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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *
0004  *  Generic Bluetooth USB driver
0005  *
0006  *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
0007  */
0008 
0009 #include <linux/dmi.h>
0010 #include <linux/module.h>
0011 #include <linux/usb.h>
0012 #include <linux/usb/quirks.h>
0013 #include <linux/firmware.h>
0014 #include <linux/iopoll.h>
0015 #include <linux/of_device.h>
0016 #include <linux/of_irq.h>
0017 #include <linux/suspend.h>
0018 #include <linux/gpio/consumer.h>
0019 #include <linux/debugfs.h>
0020 #include <asm/unaligned.h>
0021 
0022 #include <net/bluetooth/bluetooth.h>
0023 #include <net/bluetooth/hci_core.h>
0024 
0025 #include "btintel.h"
0026 #include "btbcm.h"
0027 #include "btrtl.h"
0028 #include "btmtk.h"
0029 
0030 #define VERSION "0.8"
0031 
0032 static bool disable_scofix;
0033 static bool force_scofix;
0034 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
0035 static bool reset = true;
0036 
0037 static struct usb_driver btusb_driver;
0038 
0039 #define BTUSB_IGNORE            BIT(0)
0040 #define BTUSB_DIGIANSWER        BIT(1)
0041 #define BTUSB_CSR           BIT(2)
0042 #define BTUSB_SNIFFER           BIT(3)
0043 #define BTUSB_BCM92035          BIT(4)
0044 #define BTUSB_BROKEN_ISOC       BIT(5)
0045 #define BTUSB_WRONG_SCO_MTU     BIT(6)
0046 #define BTUSB_ATH3012           BIT(7)
0047 #define BTUSB_INTEL_COMBINED        BIT(8)
0048 #define BTUSB_INTEL_BOOT        BIT(9)
0049 #define BTUSB_BCM_PATCHRAM      BIT(10)
0050 #define BTUSB_MARVELL           BIT(11)
0051 #define BTUSB_SWAVE         BIT(12)
0052 #define BTUSB_AMP           BIT(13)
0053 #define BTUSB_QCA_ROME          BIT(14)
0054 #define BTUSB_BCM_APPLE         BIT(15)
0055 #define BTUSB_REALTEK           BIT(16)
0056 #define BTUSB_BCM2045           BIT(17)
0057 #define BTUSB_IFNUM_2           BIT(18)
0058 #define BTUSB_CW6622            BIT(19)
0059 #define BTUSB_MEDIATEK          BIT(20)
0060 #define BTUSB_WIDEBAND_SPEECH       BIT(21)
0061 #define BTUSB_VALID_LE_STATES       BIT(22)
0062 #define BTUSB_QCA_WCN6855       BIT(23)
0063 #define BTUSB_INTEL_BROKEN_SHUTDOWN_LED BIT(24)
0064 #define BTUSB_INTEL_BROKEN_INITIAL_NCMD BIT(25)
0065 #define BTUSB_INTEL_NO_WBS_SUPPORT  BIT(26)
0066 
0067 static const struct usb_device_id btusb_table[] = {
0068     /* Generic Bluetooth USB device */
0069     { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
0070 
0071     /* Generic Bluetooth AMP device */
0072     { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
0073 
0074     /* Generic Bluetooth USB interface */
0075     { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
0076 
0077     /* Apple-specific (Broadcom) devices */
0078     { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
0079       .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
0080 
0081     /* MediaTek MT76x0E */
0082     { USB_DEVICE(0x0e8d, 0x763f) },
0083 
0084     /* Broadcom SoftSailing reporting vendor specific */
0085     { USB_DEVICE(0x0a5c, 0x21e1) },
0086 
0087     /* Apple MacBookPro 7,1 */
0088     { USB_DEVICE(0x05ac, 0x8213) },
0089 
0090     /* Apple iMac11,1 */
0091     { USB_DEVICE(0x05ac, 0x8215) },
0092 
0093     /* Apple MacBookPro6,2 */
0094     { USB_DEVICE(0x05ac, 0x8218) },
0095 
0096     /* Apple MacBookAir3,1, MacBookAir3,2 */
0097     { USB_DEVICE(0x05ac, 0x821b) },
0098 
0099     /* Apple MacBookAir4,1 */
0100     { USB_DEVICE(0x05ac, 0x821f) },
0101 
0102     /* Apple MacBookPro8,2 */
0103     { USB_DEVICE(0x05ac, 0x821a) },
0104 
0105     /* Apple MacMini5,1 */
0106     { USB_DEVICE(0x05ac, 0x8281) },
0107 
0108     /* AVM BlueFRITZ! USB v2.0 */
0109     { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
0110 
0111     /* Bluetooth Ultraport Module from IBM */
0112     { USB_DEVICE(0x04bf, 0x030a) },
0113 
0114     /* ALPS Modules with non-standard id */
0115     { USB_DEVICE(0x044e, 0x3001) },
0116     { USB_DEVICE(0x044e, 0x3002) },
0117 
0118     /* Ericsson with non-standard id */
0119     { USB_DEVICE(0x0bdb, 0x1002) },
0120 
0121     /* Canyon CN-BTU1 with HID interfaces */
0122     { USB_DEVICE(0x0c10, 0x0000) },
0123 
0124     /* Broadcom BCM20702B0 (Dynex/Insignia) */
0125     { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
0126 
0127     /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
0128     { USB_VENDOR_AND_INTERFACE_INFO(0x105b, 0xff, 0x01, 0x01),
0129       .driver_info = BTUSB_BCM_PATCHRAM },
0130 
0131     /* Broadcom BCM920703 (HTC Vive) */
0132     { USB_VENDOR_AND_INTERFACE_INFO(0x0bb4, 0xff, 0x01, 0x01),
0133       .driver_info = BTUSB_BCM_PATCHRAM },
0134 
0135     /* Foxconn - Hon Hai */
0136     { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
0137       .driver_info = BTUSB_BCM_PATCHRAM },
0138 
0139     /* Lite-On Technology - Broadcom based */
0140     { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
0141       .driver_info = BTUSB_BCM_PATCHRAM },
0142 
0143     /* Broadcom devices with vendor specific id */
0144     { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
0145       .driver_info = BTUSB_BCM_PATCHRAM },
0146 
0147     /* ASUSTek Computer - Broadcom based */
0148     { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
0149       .driver_info = BTUSB_BCM_PATCHRAM },
0150 
0151     /* Belkin F8065bf - Broadcom based */
0152     { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
0153       .driver_info = BTUSB_BCM_PATCHRAM },
0154 
0155     /* IMC Networks - Broadcom based */
0156     { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
0157       .driver_info = BTUSB_BCM_PATCHRAM },
0158 
0159     /* Dell Computer - Broadcom based  */
0160     { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
0161       .driver_info = BTUSB_BCM_PATCHRAM },
0162 
0163     /* Toshiba Corp - Broadcom based */
0164     { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
0165       .driver_info = BTUSB_BCM_PATCHRAM },
0166 
0167     /* Intel Bluetooth USB Bootloader (RAM module) */
0168     { USB_DEVICE(0x8087, 0x0a5a),
0169       .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
0170 
0171     { } /* Terminating entry */
0172 };
0173 
0174 MODULE_DEVICE_TABLE(usb, btusb_table);
0175 
0176 static const struct usb_device_id blacklist_table[] = {
0177     /* CSR BlueCore devices */
0178     { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
0179 
0180     /* Broadcom BCM2033 without firmware */
0181     { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
0182 
0183     /* Broadcom BCM2045 devices */
0184     { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
0185 
0186     /* Atheros 3011 with sflash firmware */
0187     { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
0188     { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
0189     { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
0190     { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
0191     { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
0192     { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
0193     { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
0194 
0195     /* Atheros AR9285 Malbec with sflash firmware */
0196     { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
0197 
0198     /* Atheros 3012 with sflash firmware */
0199     { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
0200     { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
0201     { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
0202     { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
0203     { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
0204     { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
0205     { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
0206     { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
0207     { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
0208     { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
0209     { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
0210     { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
0211     { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
0212     { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
0213     { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
0214     { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
0215     { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
0216     { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
0217     { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
0218     { USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
0219     { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
0220     { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
0221     { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
0222     { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
0223     { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
0224     { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
0225     { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
0226     { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
0227     { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
0228     { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
0229     { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
0230     { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
0231     { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
0232     { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
0233     { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
0234     { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
0235     { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
0236     { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
0237     { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
0238     { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
0239     { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
0240     { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
0241     { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
0242     { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
0243     { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
0244     { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
0245     { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
0246     { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
0247     { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
0248     { USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
0249 
0250     /* Atheros AR5BBU12 with sflash firmware */
0251     { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
0252 
0253     /* Atheros AR5BBU12 with sflash firmware */
0254     { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
0255     { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
0256 
0257     /* QCA ROME chipset */
0258     { USB_DEVICE(0x0cf3, 0x535b), .driver_info = BTUSB_QCA_ROME |
0259                              BTUSB_WIDEBAND_SPEECH },
0260     { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME |
0261                              BTUSB_WIDEBAND_SPEECH },
0262     { USB_DEVICE(0x0cf3, 0xe009), .driver_info = BTUSB_QCA_ROME |
0263                              BTUSB_WIDEBAND_SPEECH },
0264     { USB_DEVICE(0x0cf3, 0xe010), .driver_info = BTUSB_QCA_ROME |
0265                              BTUSB_WIDEBAND_SPEECH },
0266     { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME |
0267                              BTUSB_WIDEBAND_SPEECH },
0268     { USB_DEVICE(0x0cf3, 0xe301), .driver_info = BTUSB_QCA_ROME |
0269                              BTUSB_WIDEBAND_SPEECH },
0270     { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME |
0271                              BTUSB_WIDEBAND_SPEECH },
0272     { USB_DEVICE(0x0cf3, 0xe500), .driver_info = BTUSB_QCA_ROME |
0273                              BTUSB_WIDEBAND_SPEECH },
0274     { USB_DEVICE(0x0489, 0xe092), .driver_info = BTUSB_QCA_ROME |
0275                              BTUSB_WIDEBAND_SPEECH },
0276     { USB_DEVICE(0x0489, 0xe09f), .driver_info = BTUSB_QCA_ROME |
0277                              BTUSB_WIDEBAND_SPEECH },
0278     { USB_DEVICE(0x0489, 0xe0a2), .driver_info = BTUSB_QCA_ROME |
0279                              BTUSB_WIDEBAND_SPEECH },
0280     { USB_DEVICE(0x04ca, 0x3011), .driver_info = BTUSB_QCA_ROME |
0281                              BTUSB_WIDEBAND_SPEECH },
0282     { USB_DEVICE(0x04ca, 0x3015), .driver_info = BTUSB_QCA_ROME |
0283                              BTUSB_WIDEBAND_SPEECH },
0284     { USB_DEVICE(0x04ca, 0x3016), .driver_info = BTUSB_QCA_ROME |
0285                              BTUSB_WIDEBAND_SPEECH },
0286     { USB_DEVICE(0x04ca, 0x301a), .driver_info = BTUSB_QCA_ROME |
0287                              BTUSB_WIDEBAND_SPEECH },
0288     { USB_DEVICE(0x04ca, 0x3021), .driver_info = BTUSB_QCA_ROME |
0289                              BTUSB_WIDEBAND_SPEECH },
0290     { USB_DEVICE(0x13d3, 0x3491), .driver_info = BTUSB_QCA_ROME |
0291                              BTUSB_WIDEBAND_SPEECH },
0292     { USB_DEVICE(0x13d3, 0x3496), .driver_info = BTUSB_QCA_ROME |
0293                              BTUSB_WIDEBAND_SPEECH },
0294     { USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
0295                              BTUSB_WIDEBAND_SPEECH },
0296 
0297     /* QCA WCN6855 chipset */
0298     { USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
0299                              BTUSB_WIDEBAND_SPEECH |
0300                              BTUSB_VALID_LE_STATES },
0301     { USB_DEVICE(0x0489, 0xe0cc), .driver_info = BTUSB_QCA_WCN6855 |
0302                              BTUSB_WIDEBAND_SPEECH |
0303                              BTUSB_VALID_LE_STATES },
0304     { USB_DEVICE(0x0489, 0xe0d6), .driver_info = BTUSB_QCA_WCN6855 |
0305                              BTUSB_WIDEBAND_SPEECH |
0306                              BTUSB_VALID_LE_STATES },
0307     { USB_DEVICE(0x0489, 0xe0e3), .driver_info = BTUSB_QCA_WCN6855 |
0308                              BTUSB_WIDEBAND_SPEECH |
0309                              BTUSB_VALID_LE_STATES },
0310     { USB_DEVICE(0x10ab, 0x9309), .driver_info = BTUSB_QCA_WCN6855 |
0311                              BTUSB_WIDEBAND_SPEECH |
0312                              BTUSB_VALID_LE_STATES },
0313     { USB_DEVICE(0x10ab, 0x9409), .driver_info = BTUSB_QCA_WCN6855 |
0314                              BTUSB_WIDEBAND_SPEECH |
0315                              BTUSB_VALID_LE_STATES },
0316     { USB_DEVICE(0x0489, 0xe0d0), .driver_info = BTUSB_QCA_WCN6855 |
0317                              BTUSB_WIDEBAND_SPEECH |
0318                              BTUSB_VALID_LE_STATES },
0319 
0320     /* QCA WCN785x chipset */
0321     { USB_DEVICE(0x0cf3, 0xe700), .driver_info = BTUSB_QCA_WCN6855 |
0322                              BTUSB_WIDEBAND_SPEECH |
0323                              BTUSB_VALID_LE_STATES },
0324 
0325     /* Broadcom BCM2035 */
0326     { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
0327     { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
0328     { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
0329 
0330     /* Broadcom BCM2045 */
0331     { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
0332     { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
0333 
0334     /* IBM/Lenovo ThinkPad with Broadcom chip */
0335     { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
0336     { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
0337 
0338     /* HP laptop with Broadcom chip */
0339     { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
0340 
0341     /* Dell laptop with Broadcom chip */
0342     { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
0343 
0344     /* Dell Wireless 370 and 410 devices */
0345     { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
0346     { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
0347 
0348     /* Belkin F8T012 and F8T013 devices */
0349     { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
0350     { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
0351 
0352     /* Asus WL-BTD202 device */
0353     { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
0354 
0355     /* Kensington Bluetooth USB adapter */
0356     { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
0357 
0358     /* RTX Telecom based adapters with buggy SCO support */
0359     { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
0360     { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
0361 
0362     /* CONWISE Technology based adapters with buggy SCO support */
0363     { USB_DEVICE(0x0e5e, 0x6622),
0364       .driver_info = BTUSB_BROKEN_ISOC | BTUSB_CW6622},
0365 
0366     /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
0367     { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
0368 
0369     /* Digianswer devices */
0370     { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
0371     { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
0372 
0373     /* CSR BlueCore Bluetooth Sniffer */
0374     { USB_DEVICE(0x0a12, 0x0002),
0375       .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
0376 
0377     /* Frontline ComProbe Bluetooth Sniffer */
0378     { USB_DEVICE(0x16d3, 0x0002),
0379       .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
0380 
0381     /* Marvell Bluetooth devices */
0382     { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
0383     { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
0384     { USB_DEVICE(0x1286, 0x204e), .driver_info = BTUSB_MARVELL },
0385 
0386     /* Intel Bluetooth devices */
0387     { USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_COMBINED },
0388     { USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_COMBINED },
0389     { USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_COMBINED },
0390     { USB_DEVICE(0x8087, 0x0032), .driver_info = BTUSB_INTEL_COMBINED },
0391     { USB_DEVICE(0x8087, 0x0033), .driver_info = BTUSB_INTEL_COMBINED },
0392     { USB_DEVICE(0x8087, 0x0035), .driver_info = BTUSB_INTEL_COMBINED },
0393     { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
0394     { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
0395                              BTUSB_INTEL_NO_WBS_SUPPORT |
0396                              BTUSB_INTEL_BROKEN_INITIAL_NCMD |
0397                              BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
0398     { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
0399                              BTUSB_INTEL_NO_WBS_SUPPORT |
0400                              BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
0401     { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
0402     { USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
0403                              BTUSB_INTEL_BROKEN_SHUTDOWN_LED },
0404     { USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
0405 
0406     /* Other Intel Bluetooth devices */
0407     { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
0408       .driver_info = BTUSB_IGNORE },
0409 
0410     /* Realtek 8822CE Bluetooth devices */
0411     { USB_DEVICE(0x0bda, 0xb00c), .driver_info = BTUSB_REALTEK |
0412                              BTUSB_WIDEBAND_SPEECH },
0413     { USB_DEVICE(0x0bda, 0xc822), .driver_info = BTUSB_REALTEK |
0414                              BTUSB_WIDEBAND_SPEECH },
0415 
0416     /* Realtek 8852AE Bluetooth devices */
0417     { USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
0418                              BTUSB_WIDEBAND_SPEECH },
0419     { USB_DEVICE(0x0bda, 0xc852), .driver_info = BTUSB_REALTEK |
0420                              BTUSB_WIDEBAND_SPEECH },
0421     { USB_DEVICE(0x0bda, 0x385a), .driver_info = BTUSB_REALTEK |
0422                              BTUSB_WIDEBAND_SPEECH },
0423     { USB_DEVICE(0x0bda, 0x4852), .driver_info = BTUSB_REALTEK |
0424                              BTUSB_WIDEBAND_SPEECH },
0425     { USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
0426                              BTUSB_WIDEBAND_SPEECH },
0427     { USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
0428                              BTUSB_WIDEBAND_SPEECH },
0429 
0430     /* Realtek 8852CE Bluetooth devices */
0431     { USB_DEVICE(0x04ca, 0x4007), .driver_info = BTUSB_REALTEK |
0432                              BTUSB_WIDEBAND_SPEECH },
0433     { USB_DEVICE(0x04c5, 0x1675), .driver_info = BTUSB_REALTEK |
0434                              BTUSB_WIDEBAND_SPEECH },
0435     { USB_DEVICE(0x0cb8, 0xc558), .driver_info = BTUSB_REALTEK |
0436                              BTUSB_WIDEBAND_SPEECH },
0437     { USB_DEVICE(0x13d3, 0x3587), .driver_info = BTUSB_REALTEK |
0438                              BTUSB_WIDEBAND_SPEECH },
0439     { USB_DEVICE(0x13d3, 0x3586), .driver_info = BTUSB_REALTEK |
0440                              BTUSB_WIDEBAND_SPEECH },
0441 
0442     /* Realtek Bluetooth devices */
0443     { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
0444       .driver_info = BTUSB_REALTEK },
0445 
0446     /* MediaTek Bluetooth devices */
0447     { USB_VENDOR_AND_INTERFACE_INFO(0x0e8d, 0xe0, 0x01, 0x01),
0448       .driver_info = BTUSB_MEDIATEK |
0449              BTUSB_WIDEBAND_SPEECH |
0450              BTUSB_VALID_LE_STATES },
0451 
0452     /* Additional MediaTek MT7615E Bluetooth devices */
0453     { USB_DEVICE(0x13d3, 0x3560), .driver_info = BTUSB_MEDIATEK},
0454 
0455     /* Additional MediaTek MT7663 Bluetooth devices */
0456     { USB_DEVICE(0x043e, 0x310c), .driver_info = BTUSB_MEDIATEK |
0457                              BTUSB_WIDEBAND_SPEECH |
0458                              BTUSB_VALID_LE_STATES },
0459 
0460     /* Additional MediaTek MT7668 Bluetooth devices */
0461     { USB_DEVICE(0x043e, 0x3109), .driver_info = BTUSB_MEDIATEK |
0462                              BTUSB_WIDEBAND_SPEECH |
0463                              BTUSB_VALID_LE_STATES },
0464 
0465     /* Additional MediaTek MT7921 Bluetooth devices */
0466     { USB_DEVICE(0x0489, 0xe0c8), .driver_info = BTUSB_MEDIATEK |
0467                              BTUSB_WIDEBAND_SPEECH |
0468                              BTUSB_VALID_LE_STATES },
0469     { USB_DEVICE(0x04ca, 0x3802), .driver_info = BTUSB_MEDIATEK |
0470                              BTUSB_WIDEBAND_SPEECH |
0471                              BTUSB_VALID_LE_STATES },
0472     { USB_DEVICE(0x13d3, 0x3563), .driver_info = BTUSB_MEDIATEK |
0473                              BTUSB_WIDEBAND_SPEECH |
0474                              BTUSB_VALID_LE_STATES },
0475     { USB_DEVICE(0x13d3, 0x3564), .driver_info = BTUSB_MEDIATEK |
0476                              BTUSB_WIDEBAND_SPEECH |
0477                              BTUSB_VALID_LE_STATES },
0478     { USB_DEVICE(0x13d3, 0x3567), .driver_info = BTUSB_MEDIATEK |
0479                              BTUSB_WIDEBAND_SPEECH |
0480                              BTUSB_VALID_LE_STATES },
0481     { USB_DEVICE(0x0489, 0xe0cd), .driver_info = BTUSB_MEDIATEK |
0482                              BTUSB_WIDEBAND_SPEECH |
0483                              BTUSB_VALID_LE_STATES },
0484 
0485     /* MediaTek MT7922A Bluetooth devices */
0486     { USB_DEVICE(0x0489, 0xe0d8), .driver_info = BTUSB_MEDIATEK |
0487                              BTUSB_WIDEBAND_SPEECH |
0488                              BTUSB_VALID_LE_STATES },
0489     { USB_DEVICE(0x0489, 0xe0d9), .driver_info = BTUSB_MEDIATEK |
0490                              BTUSB_WIDEBAND_SPEECH |
0491                              BTUSB_VALID_LE_STATES },
0492     { USB_DEVICE(0x13d3, 0x3568), .driver_info = BTUSB_MEDIATEK |
0493                              BTUSB_WIDEBAND_SPEECH |
0494                              BTUSB_VALID_LE_STATES },
0495     { USB_DEVICE(0x0489, 0xe0e2), .driver_info = BTUSB_MEDIATEK |
0496                              BTUSB_WIDEBAND_SPEECH |
0497                              BTUSB_VALID_LE_STATES },
0498 
0499     /* Additional Realtek 8723AE Bluetooth devices */
0500     { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
0501     { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
0502 
0503     /* Additional Realtek 8723BE Bluetooth devices */
0504     { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
0505     { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
0506     { USB_DEVICE(0x04f2, 0xb49f), .driver_info = BTUSB_REALTEK },
0507     { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
0508     { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
0509     { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
0510     { USB_DEVICE(0x13d3, 0x3494), .driver_info = BTUSB_REALTEK },
0511 
0512     /* Additional Realtek 8723BU Bluetooth devices */
0513     { USB_DEVICE(0x7392, 0xa611), .driver_info = BTUSB_REALTEK },
0514 
0515     /* Additional Realtek 8723DE Bluetooth devices */
0516     { USB_DEVICE(0x0bda, 0xb009), .driver_info = BTUSB_REALTEK },
0517     { USB_DEVICE(0x2ff8, 0xb011), .driver_info = BTUSB_REALTEK },
0518 
0519     /* Additional Realtek 8761B Bluetooth devices */
0520     { USB_DEVICE(0x2357, 0x0604), .driver_info = BTUSB_REALTEK |
0521                              BTUSB_WIDEBAND_SPEECH },
0522 
0523     /* Additional Realtek 8761BU Bluetooth devices */
0524     { USB_DEVICE(0x0b05, 0x190e), .driver_info = BTUSB_REALTEK |
0525                              BTUSB_WIDEBAND_SPEECH },
0526     { USB_DEVICE(0x2550, 0x8761), .driver_info = BTUSB_REALTEK |
0527                              BTUSB_WIDEBAND_SPEECH },
0528 
0529     /* Additional Realtek 8761BUV Bluetooth devices */
0530     { USB_DEVICE(0x0bda, 0x8771), .driver_info = BTUSB_REALTEK |
0531                              BTUSB_WIDEBAND_SPEECH },
0532 
0533     /* Additional Realtek 8821AE Bluetooth devices */
0534     { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
0535     { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
0536     { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
0537     { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
0538     { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
0539 
0540     /* Additional Realtek 8822BE Bluetooth devices */
0541     { USB_DEVICE(0x13d3, 0x3526), .driver_info = BTUSB_REALTEK },
0542     { USB_DEVICE(0x0b05, 0x185c), .driver_info = BTUSB_REALTEK },
0543 
0544     /* Additional Realtek 8822CE Bluetooth devices */
0545     { USB_DEVICE(0x04ca, 0x4005), .driver_info = BTUSB_REALTEK |
0546                              BTUSB_WIDEBAND_SPEECH },
0547     { USB_DEVICE(0x04c5, 0x161f), .driver_info = BTUSB_REALTEK |
0548                              BTUSB_WIDEBAND_SPEECH },
0549     { USB_DEVICE(0x0b05, 0x18ef), .driver_info = BTUSB_REALTEK |
0550                              BTUSB_WIDEBAND_SPEECH },
0551     { USB_DEVICE(0x13d3, 0x3548), .driver_info = BTUSB_REALTEK |
0552                              BTUSB_WIDEBAND_SPEECH },
0553     { USB_DEVICE(0x13d3, 0x3549), .driver_info = BTUSB_REALTEK |
0554                              BTUSB_WIDEBAND_SPEECH },
0555     { USB_DEVICE(0x13d3, 0x3553), .driver_info = BTUSB_REALTEK |
0556                              BTUSB_WIDEBAND_SPEECH },
0557     { USB_DEVICE(0x13d3, 0x3555), .driver_info = BTUSB_REALTEK |
0558                              BTUSB_WIDEBAND_SPEECH },
0559     { USB_DEVICE(0x2ff8, 0x3051), .driver_info = BTUSB_REALTEK |
0560                              BTUSB_WIDEBAND_SPEECH },
0561     { USB_DEVICE(0x1358, 0xc123), .driver_info = BTUSB_REALTEK |
0562                              BTUSB_WIDEBAND_SPEECH },
0563     { USB_DEVICE(0x0bda, 0xc123), .driver_info = BTUSB_REALTEK |
0564                              BTUSB_WIDEBAND_SPEECH },
0565     { USB_DEVICE(0x0cb5, 0xc547), .driver_info = BTUSB_REALTEK |
0566                              BTUSB_WIDEBAND_SPEECH },
0567 
0568     /* Silicon Wave based devices */
0569     { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
0570 
0571     { } /* Terminating entry */
0572 };
0573 
0574 /* The Bluetooth USB module build into some devices needs to be reset on resume,
0575  * this is a problem with the platform (likely shutting off all power) not with
0576  * the module itself. So we use a DMI list to match known broken platforms.
0577  */
0578 static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
0579     {
0580         /* Dell OptiPlex 3060 (QCA ROME device 0cf3:e007) */
0581         .matches = {
0582             DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
0583             DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 3060"),
0584         },
0585     },
0586     {
0587         /* Dell XPS 9360 (QCA ROME device 0cf3:e300) */
0588         .matches = {
0589             DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
0590             DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
0591         },
0592     },
0593     {
0594         /* Dell Inspiron 5565 (QCA ROME device 0cf3:e009) */
0595         .matches = {
0596             DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
0597             DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5565"),
0598         },
0599     },
0600     {}
0601 };
0602 
0603 #define BTUSB_MAX_ISOC_FRAMES   10
0604 
0605 #define BTUSB_INTR_RUNNING  0
0606 #define BTUSB_BULK_RUNNING  1
0607 #define BTUSB_ISOC_RUNNING  2
0608 #define BTUSB_SUSPENDING    3
0609 #define BTUSB_DID_ISO_RESUME    4
0610 #define BTUSB_BOOTLOADER    5
0611 #define BTUSB_DOWNLOADING   6
0612 #define BTUSB_FIRMWARE_LOADED   7
0613 #define BTUSB_FIRMWARE_FAILED   8
0614 #define BTUSB_BOOTING       9
0615 #define BTUSB_DIAG_RUNNING  10
0616 #define BTUSB_OOB_WAKE_ENABLED  11
0617 #define BTUSB_HW_RESET_ACTIVE   12
0618 #define BTUSB_TX_WAIT_VND_EVT   13
0619 #define BTUSB_WAKEUP_AUTOSUSPEND    14
0620 #define BTUSB_USE_ALT3_FOR_WBS  15
0621 
0622 struct btusb_data {
0623     struct hci_dev       *hdev;
0624     struct usb_device    *udev;
0625     struct usb_interface *intf;
0626     struct usb_interface *isoc;
0627     struct usb_interface *diag;
0628     unsigned isoc_ifnum;
0629 
0630     unsigned long flags;
0631 
0632     bool poll_sync;
0633     int intr_interval;
0634     struct work_struct  work;
0635     struct work_struct  waker;
0636     struct delayed_work rx_work;
0637 
0638     struct sk_buff_head acl_q;
0639 
0640     struct usb_anchor deferred;
0641     struct usb_anchor tx_anchor;
0642     int tx_in_flight;
0643     spinlock_t txlock;
0644 
0645     struct usb_anchor intr_anchor;
0646     struct usb_anchor bulk_anchor;
0647     struct usb_anchor isoc_anchor;
0648     struct usb_anchor diag_anchor;
0649     struct usb_anchor ctrl_anchor;
0650     spinlock_t rxlock;
0651 
0652     struct sk_buff *evt_skb;
0653     struct sk_buff *acl_skb;
0654     struct sk_buff *sco_skb;
0655 
0656     struct usb_endpoint_descriptor *intr_ep;
0657     struct usb_endpoint_descriptor *bulk_tx_ep;
0658     struct usb_endpoint_descriptor *bulk_rx_ep;
0659     struct usb_endpoint_descriptor *isoc_tx_ep;
0660     struct usb_endpoint_descriptor *isoc_rx_ep;
0661     struct usb_endpoint_descriptor *diag_tx_ep;
0662     struct usb_endpoint_descriptor *diag_rx_ep;
0663 
0664     struct gpio_desc *reset_gpio;
0665 
0666     __u8 cmdreq_type;
0667     __u8 cmdreq;
0668 
0669     unsigned int sco_num;
0670     unsigned int air_mode;
0671     bool usb_alt6_packet_flow;
0672     int isoc_altsetting;
0673     int suspend_count;
0674 
0675     int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
0676     int (*recv_acl)(struct hci_dev *hdev, struct sk_buff *skb);
0677     int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
0678 
0679     int (*setup_on_usb)(struct hci_dev *hdev);
0680 
0681     int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
0682     unsigned cmd_timeout_cnt;
0683 };
0684 
0685 static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
0686 {
0687     struct btusb_data *data = hci_get_drvdata(hdev);
0688     struct gpio_desc *reset_gpio = data->reset_gpio;
0689 
0690     if (++data->cmd_timeout_cnt < 5)
0691         return;
0692 
0693     if (!reset_gpio) {
0694         bt_dev_err(hdev, "No way to reset. Ignoring and continuing");
0695         return;
0696     }
0697 
0698     /*
0699      * Toggle the hard reset line if the platform provides one. The reset
0700      * is going to yank the device off the USB and then replug. So doing
0701      * once is enough. The cleanup is handled correctly on the way out
0702      * (standard USB disconnect), and the new device is detected cleanly
0703      * and bound to the driver again like it should be.
0704      */
0705     if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
0706         bt_dev_err(hdev, "last reset failed? Not resetting again");
0707         return;
0708     }
0709 
0710     bt_dev_err(hdev, "Initiating HW reset via gpio");
0711     gpiod_set_value_cansleep(reset_gpio, 1);
0712     msleep(100);
0713     gpiod_set_value_cansleep(reset_gpio, 0);
0714 }
0715 
0716 static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
0717 {
0718     struct btusb_data *data = hci_get_drvdata(hdev);
0719     struct gpio_desc *reset_gpio = data->reset_gpio;
0720 
0721     if (++data->cmd_timeout_cnt < 5)
0722         return;
0723 
0724     if (!reset_gpio) {
0725         bt_dev_err(hdev, "No gpio to reset Realtek device, ignoring");
0726         return;
0727     }
0728 
0729     /* Toggle the hard reset line. The Realtek device is going to
0730      * yank itself off the USB and then replug. The cleanup is handled
0731      * correctly on the way out (standard USB disconnect), and the new
0732      * device is detected cleanly and bound to the driver again like
0733      * it should be.
0734      */
0735     if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
0736         bt_dev_err(hdev, "last reset failed? Not resetting again");
0737         return;
0738     }
0739 
0740     bt_dev_err(hdev, "Reset Realtek device via gpio");
0741     gpiod_set_value_cansleep(reset_gpio, 1);
0742     msleep(200);
0743     gpiod_set_value_cansleep(reset_gpio, 0);
0744 }
0745 
0746 static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
0747 {
0748     struct btusb_data *data = hci_get_drvdata(hdev);
0749     struct gpio_desc *reset_gpio = data->reset_gpio;
0750     int err;
0751 
0752     if (++data->cmd_timeout_cnt < 5)
0753         return;
0754 
0755     if (reset_gpio) {
0756         bt_dev_err(hdev, "Reset qca device via bt_en gpio");
0757 
0758         /* Toggle the hard reset line. The qca bt device is going to
0759          * yank itself off the USB and then replug. The cleanup is handled
0760          * correctly on the way out (standard USB disconnect), and the new
0761          * device is detected cleanly and bound to the driver again like
0762          * it should be.
0763          */
0764         if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
0765             bt_dev_err(hdev, "last reset failed? Not resetting again");
0766             return;
0767         }
0768 
0769         gpiod_set_value_cansleep(reset_gpio, 0);
0770         msleep(200);
0771         gpiod_set_value_cansleep(reset_gpio, 1);
0772 
0773         return;
0774     }
0775 
0776     bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
0777     /* This is not an unbalanced PM reference since the device will reset */
0778     err = usb_autopm_get_interface(data->intf);
0779     if (!err)
0780         usb_queue_reset_device(data->intf);
0781     else
0782         bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
0783 }
0784 
0785 static inline void btusb_free_frags(struct btusb_data *data)
0786 {
0787     unsigned long flags;
0788 
0789     spin_lock_irqsave(&data->rxlock, flags);
0790 
0791     kfree_skb(data->evt_skb);
0792     data->evt_skb = NULL;
0793 
0794     kfree_skb(data->acl_skb);
0795     data->acl_skb = NULL;
0796 
0797     kfree_skb(data->sco_skb);
0798     data->sco_skb = NULL;
0799 
0800     spin_unlock_irqrestore(&data->rxlock, flags);
0801 }
0802 
0803 static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb)
0804 {
0805     if (data->intr_interval) {
0806         /* Trigger dequeue immediatelly if an event is received */
0807         schedule_delayed_work(&data->rx_work, 0);
0808     }
0809 
0810     return data->recv_event(data->hdev, skb);
0811 }
0812 
0813 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
0814 {
0815     struct sk_buff *skb;
0816     unsigned long flags;
0817     int err = 0;
0818 
0819     spin_lock_irqsave(&data->rxlock, flags);
0820     skb = data->evt_skb;
0821 
0822     while (count) {
0823         int len;
0824 
0825         if (!skb) {
0826             skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
0827             if (!skb) {
0828                 err = -ENOMEM;
0829                 break;
0830             }
0831 
0832             hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
0833             hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
0834         }
0835 
0836         len = min_t(uint, hci_skb_expect(skb), count);
0837         skb_put_data(skb, buffer, len);
0838 
0839         count -= len;
0840         buffer += len;
0841         hci_skb_expect(skb) -= len;
0842 
0843         if (skb->len == HCI_EVENT_HDR_SIZE) {
0844             /* Complete event header */
0845             hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
0846 
0847             if (skb_tailroom(skb) < hci_skb_expect(skb)) {
0848                 kfree_skb(skb);
0849                 skb = NULL;
0850 
0851                 err = -EILSEQ;
0852                 break;
0853             }
0854         }
0855 
0856         if (!hci_skb_expect(skb)) {
0857             /* Complete frame */
0858             btusb_recv_event(data, skb);
0859             skb = NULL;
0860         }
0861     }
0862 
0863     data->evt_skb = skb;
0864     spin_unlock_irqrestore(&data->rxlock, flags);
0865 
0866     return err;
0867 }
0868 
0869 static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb)
0870 {
0871     /* Only queue ACL packet if intr_interval is set as it means
0872      * force_poll_sync has been enabled.
0873      */
0874     if (!data->intr_interval)
0875         return data->recv_acl(data->hdev, skb);
0876 
0877     skb_queue_tail(&data->acl_q, skb);
0878     schedule_delayed_work(&data->rx_work, data->intr_interval);
0879 
0880     return 0;
0881 }
0882 
0883 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
0884 {
0885     struct sk_buff *skb;
0886     unsigned long flags;
0887     int err = 0;
0888 
0889     spin_lock_irqsave(&data->rxlock, flags);
0890     skb = data->acl_skb;
0891 
0892     while (count) {
0893         int len;
0894 
0895         if (!skb) {
0896             skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
0897             if (!skb) {
0898                 err = -ENOMEM;
0899                 break;
0900             }
0901 
0902             hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
0903             hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
0904         }
0905 
0906         len = min_t(uint, hci_skb_expect(skb), count);
0907         skb_put_data(skb, buffer, len);
0908 
0909         count -= len;
0910         buffer += len;
0911         hci_skb_expect(skb) -= len;
0912 
0913         if (skb->len == HCI_ACL_HDR_SIZE) {
0914             __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
0915             __le16 dlen = hci_acl_hdr(skb)->dlen;
0916             __u8 type;
0917 
0918             /* Complete ACL header */
0919             hci_skb_expect(skb) = __le16_to_cpu(dlen);
0920 
0921             /* Detect if ISO packet has been sent over bulk */
0922             if (hci_conn_num(data->hdev, ISO_LINK)) {
0923                 type = hci_conn_lookup_type(data->hdev,
0924                                 hci_handle(handle));
0925                 if (type == ISO_LINK)
0926                     hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
0927             }
0928 
0929             if (skb_tailroom(skb) < hci_skb_expect(skb)) {
0930                 kfree_skb(skb);
0931                 skb = NULL;
0932 
0933                 err = -EILSEQ;
0934                 break;
0935             }
0936         }
0937 
0938         if (!hci_skb_expect(skb)) {
0939             /* Complete frame */
0940             btusb_recv_acl(data, skb);
0941             skb = NULL;
0942         }
0943     }
0944 
0945     data->acl_skb = skb;
0946     spin_unlock_irqrestore(&data->rxlock, flags);
0947 
0948     return err;
0949 }
0950 
0951 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
0952 {
0953     struct sk_buff *skb;
0954     unsigned long flags;
0955     int err = 0;
0956 
0957     spin_lock_irqsave(&data->rxlock, flags);
0958     skb = data->sco_skb;
0959 
0960     while (count) {
0961         int len;
0962 
0963         if (!skb) {
0964             skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
0965             if (!skb) {
0966                 err = -ENOMEM;
0967                 break;
0968             }
0969 
0970             hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
0971             hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
0972         }
0973 
0974         len = min_t(uint, hci_skb_expect(skb), count);
0975         skb_put_data(skb, buffer, len);
0976 
0977         count -= len;
0978         buffer += len;
0979         hci_skb_expect(skb) -= len;
0980 
0981         if (skb->len == HCI_SCO_HDR_SIZE) {
0982             /* Complete SCO header */
0983             hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
0984 
0985             if (skb_tailroom(skb) < hci_skb_expect(skb)) {
0986                 kfree_skb(skb);
0987                 skb = NULL;
0988 
0989                 err = -EILSEQ;
0990                 break;
0991             }
0992         }
0993 
0994         if (!hci_skb_expect(skb)) {
0995             /* Complete frame */
0996             hci_recv_frame(data->hdev, skb);
0997             skb = NULL;
0998         }
0999     }
1000 
1001     data->sco_skb = skb;
1002     spin_unlock_irqrestore(&data->rxlock, flags);
1003 
1004     return err;
1005 }
1006 
1007 static void btusb_intr_complete(struct urb *urb)
1008 {
1009     struct hci_dev *hdev = urb->context;
1010     struct btusb_data *data = hci_get_drvdata(hdev);
1011     int err;
1012 
1013     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1014            urb->actual_length);
1015 
1016     if (!test_bit(HCI_RUNNING, &hdev->flags))
1017         return;
1018 
1019     if (urb->status == 0) {
1020         hdev->stat.byte_rx += urb->actual_length;
1021 
1022         if (btusb_recv_intr(data, urb->transfer_buffer,
1023                     urb->actual_length) < 0) {
1024             bt_dev_err(hdev, "corrupted event packet");
1025             hdev->stat.err_rx++;
1026         }
1027     } else if (urb->status == -ENOENT) {
1028         /* Avoid suspend failed when usb_kill_urb */
1029         return;
1030     }
1031 
1032     if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
1033         return;
1034 
1035     usb_mark_last_busy(data->udev);
1036     usb_anchor_urb(urb, &data->intr_anchor);
1037 
1038     err = usb_submit_urb(urb, GFP_ATOMIC);
1039     if (err < 0) {
1040         /* -EPERM: urb is being killed;
1041          * -ENODEV: device got disconnected
1042          */
1043         if (err != -EPERM && err != -ENODEV)
1044             bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1045                    urb, -err);
1046         if (err != -EPERM)
1047             hci_cmd_sync_cancel(hdev, -err);
1048         usb_unanchor_urb(urb);
1049     }
1050 }
1051 
1052 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1053 {
1054     struct btusb_data *data = hci_get_drvdata(hdev);
1055     struct urb *urb;
1056     unsigned char *buf;
1057     unsigned int pipe;
1058     int err, size;
1059 
1060     BT_DBG("%s", hdev->name);
1061 
1062     if (!data->intr_ep)
1063         return -ENODEV;
1064 
1065     urb = usb_alloc_urb(0, mem_flags);
1066     if (!urb)
1067         return -ENOMEM;
1068 
1069     size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
1070 
1071     buf = kmalloc(size, mem_flags);
1072     if (!buf) {
1073         usb_free_urb(urb);
1074         return -ENOMEM;
1075     }
1076 
1077     pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
1078 
1079     usb_fill_int_urb(urb, data->udev, pipe, buf, size,
1080              btusb_intr_complete, hdev, data->intr_ep->bInterval);
1081 
1082     urb->transfer_flags |= URB_FREE_BUFFER;
1083 
1084     usb_anchor_urb(urb, &data->intr_anchor);
1085 
1086     err = usb_submit_urb(urb, mem_flags);
1087     if (err < 0) {
1088         if (err != -EPERM && err != -ENODEV)
1089             bt_dev_err(hdev, "urb %p submission failed (%d)",
1090                    urb, -err);
1091         if (err != -EPERM)
1092             hci_cmd_sync_cancel(hdev, -err);
1093         usb_unanchor_urb(urb);
1094     }
1095 
1096     /* Only initialize intr_interval if URB poll sync is enabled */
1097     if (!data->poll_sync)
1098         goto done;
1099 
1100     /* The units are frames (milliseconds) for full and low speed devices,
1101      * and microframes (1/8 millisecond) for highspeed and SuperSpeed
1102      * devices.
1103      *
1104      * This is done once on open/resume so it shouldn't change even if
1105      * force_poll_sync changes.
1106      */
1107     switch (urb->dev->speed) {
1108     case USB_SPEED_SUPER_PLUS:
1109     case USB_SPEED_SUPER:   /* units are 125us */
1110         data->intr_interval = usecs_to_jiffies(urb->interval * 125);
1111         break;
1112     default:
1113         data->intr_interval = msecs_to_jiffies(urb->interval);
1114         break;
1115     }
1116 
1117 done:
1118     usb_free_urb(urb);
1119 
1120     return err;
1121 }
1122 
1123 static void btusb_bulk_complete(struct urb *urb)
1124 {
1125     struct hci_dev *hdev = urb->context;
1126     struct btusb_data *data = hci_get_drvdata(hdev);
1127     int err;
1128 
1129     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1130            urb->actual_length);
1131 
1132     if (!test_bit(HCI_RUNNING, &hdev->flags))
1133         return;
1134 
1135     if (urb->status == 0) {
1136         hdev->stat.byte_rx += urb->actual_length;
1137 
1138         if (data->recv_bulk(data, urb->transfer_buffer,
1139                     urb->actual_length) < 0) {
1140             bt_dev_err(hdev, "corrupted ACL packet");
1141             hdev->stat.err_rx++;
1142         }
1143     } else if (urb->status == -ENOENT) {
1144         /* Avoid suspend failed when usb_kill_urb */
1145         return;
1146     }
1147 
1148     if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
1149         return;
1150 
1151     usb_anchor_urb(urb, &data->bulk_anchor);
1152     usb_mark_last_busy(data->udev);
1153 
1154     err = usb_submit_urb(urb, GFP_ATOMIC);
1155     if (err < 0) {
1156         /* -EPERM: urb is being killed;
1157          * -ENODEV: device got disconnected
1158          */
1159         if (err != -EPERM && err != -ENODEV)
1160             bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1161                    urb, -err);
1162         usb_unanchor_urb(urb);
1163     }
1164 }
1165 
1166 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
1167 {
1168     struct btusb_data *data = hci_get_drvdata(hdev);
1169     struct urb *urb;
1170     unsigned char *buf;
1171     unsigned int pipe;
1172     int err, size = HCI_MAX_FRAME_SIZE;
1173 
1174     BT_DBG("%s", hdev->name);
1175 
1176     if (!data->bulk_rx_ep)
1177         return -ENODEV;
1178 
1179     urb = usb_alloc_urb(0, mem_flags);
1180     if (!urb)
1181         return -ENOMEM;
1182 
1183     buf = kmalloc(size, mem_flags);
1184     if (!buf) {
1185         usb_free_urb(urb);
1186         return -ENOMEM;
1187     }
1188 
1189     pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
1190 
1191     usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1192               btusb_bulk_complete, hdev);
1193 
1194     urb->transfer_flags |= URB_FREE_BUFFER;
1195 
1196     usb_mark_last_busy(data->udev);
1197     usb_anchor_urb(urb, &data->bulk_anchor);
1198 
1199     err = usb_submit_urb(urb, mem_flags);
1200     if (err < 0) {
1201         if (err != -EPERM && err != -ENODEV)
1202             bt_dev_err(hdev, "urb %p submission failed (%d)",
1203                    urb, -err);
1204         usb_unanchor_urb(urb);
1205     }
1206 
1207     usb_free_urb(urb);
1208 
1209     return err;
1210 }
1211 
1212 static void btusb_isoc_complete(struct urb *urb)
1213 {
1214     struct hci_dev *hdev = urb->context;
1215     struct btusb_data *data = hci_get_drvdata(hdev);
1216     int i, err;
1217 
1218     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1219            urb->actual_length);
1220 
1221     if (!test_bit(HCI_RUNNING, &hdev->flags))
1222         return;
1223 
1224     if (urb->status == 0) {
1225         for (i = 0; i < urb->number_of_packets; i++) {
1226             unsigned int offset = urb->iso_frame_desc[i].offset;
1227             unsigned int length = urb->iso_frame_desc[i].actual_length;
1228 
1229             if (urb->iso_frame_desc[i].status)
1230                 continue;
1231 
1232             hdev->stat.byte_rx += length;
1233 
1234             if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
1235                         length) < 0) {
1236                 bt_dev_err(hdev, "corrupted SCO packet");
1237                 hdev->stat.err_rx++;
1238             }
1239         }
1240     } else if (urb->status == -ENOENT) {
1241         /* Avoid suspend failed when usb_kill_urb */
1242         return;
1243     }
1244 
1245     if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1246         return;
1247 
1248     usb_anchor_urb(urb, &data->isoc_anchor);
1249 
1250     err = usb_submit_urb(urb, GFP_ATOMIC);
1251     if (err < 0) {
1252         /* -EPERM: urb is being killed;
1253          * -ENODEV: device got disconnected
1254          */
1255         if (err != -EPERM && err != -ENODEV)
1256             bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1257                    urb, -err);
1258         usb_unanchor_urb(urb);
1259     }
1260 }
1261 
1262 static inline void __fill_isoc_descriptor_msbc(struct urb *urb, int len,
1263                            int mtu, struct btusb_data *data)
1264 {
1265     int i, offset = 0;
1266     unsigned int interval;
1267 
1268     BT_DBG("len %d mtu %d", len, mtu);
1269 
1270     /* For mSBC ALT 6 setting the host will send the packet at continuous
1271      * flow. As per core spec 5, vol 4, part B, table 2.1. For ALT setting
1272      * 6 the HCI PACKET INTERVAL should be 7.5ms for every usb packets.
1273      * To maintain the rate we send 63bytes of usb packets alternatively for
1274      * 7ms and 8ms to maintain the rate as 7.5ms.
1275      */
1276     if (data->usb_alt6_packet_flow) {
1277         interval = 7;
1278         data->usb_alt6_packet_flow = false;
1279     } else {
1280         interval = 6;
1281         data->usb_alt6_packet_flow = true;
1282     }
1283 
1284     for (i = 0; i < interval; i++) {
1285         urb->iso_frame_desc[i].offset = offset;
1286         urb->iso_frame_desc[i].length = offset;
1287     }
1288 
1289     if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1290         urb->iso_frame_desc[i].offset = offset;
1291         urb->iso_frame_desc[i].length = len;
1292         i++;
1293     }
1294 
1295     urb->number_of_packets = i;
1296 }
1297 
1298 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1299 {
1300     int i, offset = 0;
1301 
1302     BT_DBG("len %d mtu %d", len, mtu);
1303 
1304     for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1305                     i++, offset += mtu, len -= mtu) {
1306         urb->iso_frame_desc[i].offset = offset;
1307         urb->iso_frame_desc[i].length = mtu;
1308     }
1309 
1310     if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1311         urb->iso_frame_desc[i].offset = offset;
1312         urb->iso_frame_desc[i].length = len;
1313         i++;
1314     }
1315 
1316     urb->number_of_packets = i;
1317 }
1318 
1319 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
1320 {
1321     struct btusb_data *data = hci_get_drvdata(hdev);
1322     struct urb *urb;
1323     unsigned char *buf;
1324     unsigned int pipe;
1325     int err, size;
1326 
1327     BT_DBG("%s", hdev->name);
1328 
1329     if (!data->isoc_rx_ep)
1330         return -ENODEV;
1331 
1332     urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1333     if (!urb)
1334         return -ENOMEM;
1335 
1336     size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1337                         BTUSB_MAX_ISOC_FRAMES;
1338 
1339     buf = kmalloc(size, mem_flags);
1340     if (!buf) {
1341         usb_free_urb(urb);
1342         return -ENOMEM;
1343     }
1344 
1345     pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1346 
1347     usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
1348              hdev, data->isoc_rx_ep->bInterval);
1349 
1350     urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
1351 
1352     __fill_isoc_descriptor(urb, size,
1353                    le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1354 
1355     usb_anchor_urb(urb, &data->isoc_anchor);
1356 
1357     err = usb_submit_urb(urb, mem_flags);
1358     if (err < 0) {
1359         if (err != -EPERM && err != -ENODEV)
1360             bt_dev_err(hdev, "urb %p submission failed (%d)",
1361                    urb, -err);
1362         usb_unanchor_urb(urb);
1363     }
1364 
1365     usb_free_urb(urb);
1366 
1367     return err;
1368 }
1369 
1370 static void btusb_diag_complete(struct urb *urb)
1371 {
1372     struct hci_dev *hdev = urb->context;
1373     struct btusb_data *data = hci_get_drvdata(hdev);
1374     int err;
1375 
1376     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1377            urb->actual_length);
1378 
1379     if (urb->status == 0) {
1380         struct sk_buff *skb;
1381 
1382         skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
1383         if (skb) {
1384             skb_put_data(skb, urb->transfer_buffer,
1385                      urb->actual_length);
1386             hci_recv_diag(hdev, skb);
1387         }
1388     } else if (urb->status == -ENOENT) {
1389         /* Avoid suspend failed when usb_kill_urb */
1390         return;
1391     }
1392 
1393     if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
1394         return;
1395 
1396     usb_anchor_urb(urb, &data->diag_anchor);
1397     usb_mark_last_busy(data->udev);
1398 
1399     err = usb_submit_urb(urb, GFP_ATOMIC);
1400     if (err < 0) {
1401         /* -EPERM: urb is being killed;
1402          * -ENODEV: device got disconnected
1403          */
1404         if (err != -EPERM && err != -ENODEV)
1405             bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1406                    urb, -err);
1407         usb_unanchor_urb(urb);
1408     }
1409 }
1410 
1411 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
1412 {
1413     struct btusb_data *data = hci_get_drvdata(hdev);
1414     struct urb *urb;
1415     unsigned char *buf;
1416     unsigned int pipe;
1417     int err, size = HCI_MAX_FRAME_SIZE;
1418 
1419     BT_DBG("%s", hdev->name);
1420 
1421     if (!data->diag_rx_ep)
1422         return -ENODEV;
1423 
1424     urb = usb_alloc_urb(0, mem_flags);
1425     if (!urb)
1426         return -ENOMEM;
1427 
1428     buf = kmalloc(size, mem_flags);
1429     if (!buf) {
1430         usb_free_urb(urb);
1431         return -ENOMEM;
1432     }
1433 
1434     pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
1435 
1436     usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1437               btusb_diag_complete, hdev);
1438 
1439     urb->transfer_flags |= URB_FREE_BUFFER;
1440 
1441     usb_mark_last_busy(data->udev);
1442     usb_anchor_urb(urb, &data->diag_anchor);
1443 
1444     err = usb_submit_urb(urb, mem_flags);
1445     if (err < 0) {
1446         if (err != -EPERM && err != -ENODEV)
1447             bt_dev_err(hdev, "urb %p submission failed (%d)",
1448                    urb, -err);
1449         usb_unanchor_urb(urb);
1450     }
1451 
1452     usb_free_urb(urb);
1453 
1454     return err;
1455 }
1456 
1457 static void btusb_tx_complete(struct urb *urb)
1458 {
1459     struct sk_buff *skb = urb->context;
1460     struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1461     struct btusb_data *data = hci_get_drvdata(hdev);
1462     unsigned long flags;
1463 
1464     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1465            urb->actual_length);
1466 
1467     if (!test_bit(HCI_RUNNING, &hdev->flags))
1468         goto done;
1469 
1470     if (!urb->status) {
1471         hdev->stat.byte_tx += urb->transfer_buffer_length;
1472     } else {
1473         if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)
1474             hci_cmd_sync_cancel(hdev, -urb->status);
1475         hdev->stat.err_tx++;
1476     }
1477 
1478 done:
1479     spin_lock_irqsave(&data->txlock, flags);
1480     data->tx_in_flight--;
1481     spin_unlock_irqrestore(&data->txlock, flags);
1482 
1483     kfree(urb->setup_packet);
1484 
1485     kfree_skb(skb);
1486 }
1487 
1488 static void btusb_isoc_tx_complete(struct urb *urb)
1489 {
1490     struct sk_buff *skb = urb->context;
1491     struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1492 
1493     BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1494            urb->actual_length);
1495 
1496     if (!test_bit(HCI_RUNNING, &hdev->flags))
1497         goto done;
1498 
1499     if (!urb->status)
1500         hdev->stat.byte_tx += urb->transfer_buffer_length;
1501     else
1502         hdev->stat.err_tx++;
1503 
1504 done:
1505     kfree(urb->setup_packet);
1506 
1507     kfree_skb(skb);
1508 }
1509 
1510 static int btusb_open(struct hci_dev *hdev)
1511 {
1512     struct btusb_data *data = hci_get_drvdata(hdev);
1513     int err;
1514 
1515     BT_DBG("%s", hdev->name);
1516 
1517     err = usb_autopm_get_interface(data->intf);
1518     if (err < 0)
1519         return err;
1520 
1521     /* Patching USB firmware files prior to starting any URBs of HCI path
1522      * It is more safe to use USB bulk channel for downloading USB patch
1523      */
1524     if (data->setup_on_usb) {
1525         err = data->setup_on_usb(hdev);
1526         if (err < 0)
1527             goto setup_fail;
1528     }
1529 
1530     data->intf->needs_remote_wakeup = 1;
1531 
1532     if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1533         goto done;
1534 
1535     err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1536     if (err < 0)
1537         goto failed;
1538 
1539     err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1540     if (err < 0) {
1541         usb_kill_anchored_urbs(&data->intr_anchor);
1542         goto failed;
1543     }
1544 
1545     set_bit(BTUSB_BULK_RUNNING, &data->flags);
1546     btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1547 
1548     if (data->diag) {
1549         if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1550             set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1551     }
1552 
1553 done:
1554     usb_autopm_put_interface(data->intf);
1555     return 0;
1556 
1557 failed:
1558     clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1559 setup_fail:
1560     usb_autopm_put_interface(data->intf);
1561     return err;
1562 }
1563 
1564 static void btusb_stop_traffic(struct btusb_data *data)
1565 {
1566     usb_kill_anchored_urbs(&data->intr_anchor);
1567     usb_kill_anchored_urbs(&data->bulk_anchor);
1568     usb_kill_anchored_urbs(&data->isoc_anchor);
1569     usb_kill_anchored_urbs(&data->diag_anchor);
1570     usb_kill_anchored_urbs(&data->ctrl_anchor);
1571 }
1572 
1573 static int btusb_close(struct hci_dev *hdev)
1574 {
1575     struct btusb_data *data = hci_get_drvdata(hdev);
1576     int err;
1577 
1578     BT_DBG("%s", hdev->name);
1579 
1580     cancel_delayed_work(&data->rx_work);
1581     cancel_work_sync(&data->work);
1582     cancel_work_sync(&data->waker);
1583 
1584     skb_queue_purge(&data->acl_q);
1585 
1586     clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1587     clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1588     clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1589     clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1590 
1591     btusb_stop_traffic(data);
1592     btusb_free_frags(data);
1593 
1594     err = usb_autopm_get_interface(data->intf);
1595     if (err < 0)
1596         goto failed;
1597 
1598     data->intf->needs_remote_wakeup = 0;
1599 
1600     /* Enable remote wake up for auto-suspend */
1601     if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
1602         data->intf->needs_remote_wakeup = 1;
1603 
1604     usb_autopm_put_interface(data->intf);
1605 
1606 failed:
1607     usb_scuttle_anchored_urbs(&data->deferred);
1608     return 0;
1609 }
1610 
1611 static int btusb_flush(struct hci_dev *hdev)
1612 {
1613     struct btusb_data *data = hci_get_drvdata(hdev);
1614 
1615     BT_DBG("%s", hdev->name);
1616 
1617     cancel_delayed_work(&data->rx_work);
1618 
1619     skb_queue_purge(&data->acl_q);
1620 
1621     usb_kill_anchored_urbs(&data->tx_anchor);
1622     btusb_free_frags(data);
1623 
1624     return 0;
1625 }
1626 
1627 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1628 {
1629     struct btusb_data *data = hci_get_drvdata(hdev);
1630     struct usb_ctrlrequest *dr;
1631     struct urb *urb;
1632     unsigned int pipe;
1633 
1634     urb = usb_alloc_urb(0, GFP_KERNEL);
1635     if (!urb)
1636         return ERR_PTR(-ENOMEM);
1637 
1638     dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1639     if (!dr) {
1640         usb_free_urb(urb);
1641         return ERR_PTR(-ENOMEM);
1642     }
1643 
1644     dr->bRequestType = data->cmdreq_type;
1645     dr->bRequest     = data->cmdreq;
1646     dr->wIndex       = 0;
1647     dr->wValue       = 0;
1648     dr->wLength      = __cpu_to_le16(skb->len);
1649 
1650     pipe = usb_sndctrlpipe(data->udev, 0x00);
1651 
1652     usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1653                  skb->data, skb->len, btusb_tx_complete, skb);
1654 
1655     skb->dev = (void *)hdev;
1656 
1657     return urb;
1658 }
1659 
1660 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1661 {
1662     struct btusb_data *data = hci_get_drvdata(hdev);
1663     struct urb *urb;
1664     unsigned int pipe;
1665 
1666     if (!data->bulk_tx_ep)
1667         return ERR_PTR(-ENODEV);
1668 
1669     urb = usb_alloc_urb(0, GFP_KERNEL);
1670     if (!urb)
1671         return ERR_PTR(-ENOMEM);
1672 
1673     pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1674 
1675     usb_fill_bulk_urb(urb, data->udev, pipe,
1676               skb->data, skb->len, btusb_tx_complete, skb);
1677 
1678     skb->dev = (void *)hdev;
1679 
1680     return urb;
1681 }
1682 
1683 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1684 {
1685     struct btusb_data *data = hci_get_drvdata(hdev);
1686     struct urb *urb;
1687     unsigned int pipe;
1688 
1689     if (!data->isoc_tx_ep)
1690         return ERR_PTR(-ENODEV);
1691 
1692     urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1693     if (!urb)
1694         return ERR_PTR(-ENOMEM);
1695 
1696     pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1697 
1698     usb_fill_int_urb(urb, data->udev, pipe,
1699              skb->data, skb->len, btusb_isoc_tx_complete,
1700              skb, data->isoc_tx_ep->bInterval);
1701 
1702     urb->transfer_flags  = URB_ISO_ASAP;
1703 
1704     if (data->isoc_altsetting == 6)
1705         __fill_isoc_descriptor_msbc(urb, skb->len,
1706                         le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize),
1707                         data);
1708     else
1709         __fill_isoc_descriptor(urb, skb->len,
1710                        le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1711     skb->dev = (void *)hdev;
1712 
1713     return urb;
1714 }
1715 
1716 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1717 {
1718     struct btusb_data *data = hci_get_drvdata(hdev);
1719     int err;
1720 
1721     usb_anchor_urb(urb, &data->tx_anchor);
1722 
1723     err = usb_submit_urb(urb, GFP_KERNEL);
1724     if (err < 0) {
1725         if (err != -EPERM && err != -ENODEV)
1726             bt_dev_err(hdev, "urb %p submission failed (%d)",
1727                    urb, -err);
1728         kfree(urb->setup_packet);
1729         usb_unanchor_urb(urb);
1730     } else {
1731         usb_mark_last_busy(data->udev);
1732     }
1733 
1734     usb_free_urb(urb);
1735     return err;
1736 }
1737 
1738 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1739 {
1740     struct btusb_data *data = hci_get_drvdata(hdev);
1741     unsigned long flags;
1742     bool suspending;
1743 
1744     spin_lock_irqsave(&data->txlock, flags);
1745     suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1746     if (!suspending)
1747         data->tx_in_flight++;
1748     spin_unlock_irqrestore(&data->txlock, flags);
1749 
1750     if (!suspending)
1751         return submit_tx_urb(hdev, urb);
1752 
1753     usb_anchor_urb(urb, &data->deferred);
1754     schedule_work(&data->waker);
1755 
1756     usb_free_urb(urb);
1757     return 0;
1758 }
1759 
1760 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1761 {
1762     struct urb *urb;
1763 
1764     BT_DBG("%s", hdev->name);
1765 
1766     switch (hci_skb_pkt_type(skb)) {
1767     case HCI_COMMAND_PKT:
1768         urb = alloc_ctrl_urb(hdev, skb);
1769         if (IS_ERR(urb))
1770             return PTR_ERR(urb);
1771 
1772         hdev->stat.cmd_tx++;
1773         return submit_or_queue_tx_urb(hdev, urb);
1774 
1775     case HCI_ACLDATA_PKT:
1776         urb = alloc_bulk_urb(hdev, skb);
1777         if (IS_ERR(urb))
1778             return PTR_ERR(urb);
1779 
1780         hdev->stat.acl_tx++;
1781         return submit_or_queue_tx_urb(hdev, urb);
1782 
1783     case HCI_SCODATA_PKT:
1784         if (hci_conn_num(hdev, SCO_LINK) < 1)
1785             return -ENODEV;
1786 
1787         urb = alloc_isoc_urb(hdev, skb);
1788         if (IS_ERR(urb))
1789             return PTR_ERR(urb);
1790 
1791         hdev->stat.sco_tx++;
1792         return submit_tx_urb(hdev, urb);
1793 
1794     case HCI_ISODATA_PKT:
1795         urb = alloc_bulk_urb(hdev, skb);
1796         if (IS_ERR(urb))
1797             return PTR_ERR(urb);
1798 
1799         return submit_or_queue_tx_urb(hdev, urb);
1800     }
1801 
1802     return -EILSEQ;
1803 }
1804 
1805 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1806 {
1807     struct btusb_data *data = hci_get_drvdata(hdev);
1808 
1809     BT_DBG("%s evt %d", hdev->name, evt);
1810 
1811     if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1812         data->sco_num = hci_conn_num(hdev, SCO_LINK);
1813         data->air_mode = evt;
1814         schedule_work(&data->work);
1815     }
1816 }
1817 
1818 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1819 {
1820     struct btusb_data *data = hci_get_drvdata(hdev);
1821     struct usb_interface *intf = data->isoc;
1822     struct usb_endpoint_descriptor *ep_desc;
1823     int i, err;
1824 
1825     if (!data->isoc)
1826         return -ENODEV;
1827 
1828     err = usb_set_interface(data->udev, data->isoc_ifnum, altsetting);
1829     if (err < 0) {
1830         bt_dev_err(hdev, "setting interface failed (%d)", -err);
1831         return err;
1832     }
1833 
1834     data->isoc_altsetting = altsetting;
1835 
1836     data->isoc_tx_ep = NULL;
1837     data->isoc_rx_ep = NULL;
1838 
1839     for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1840         ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1841 
1842         if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1843             data->isoc_tx_ep = ep_desc;
1844             continue;
1845         }
1846 
1847         if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1848             data->isoc_rx_ep = ep_desc;
1849             continue;
1850         }
1851     }
1852 
1853     if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1854         bt_dev_err(hdev, "invalid SCO descriptors");
1855         return -ENODEV;
1856     }
1857 
1858     return 0;
1859 }
1860 
1861 static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
1862 {
1863     struct btusb_data *data = hci_get_drvdata(hdev);
1864     int err;
1865 
1866     if (data->isoc_altsetting != new_alts) {
1867         unsigned long flags;
1868 
1869         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1870         usb_kill_anchored_urbs(&data->isoc_anchor);
1871 
1872         /* When isochronous alternate setting needs to be
1873          * changed, because SCO connection has been added
1874          * or removed, a packet fragment may be left in the
1875          * reassembling state. This could lead to wrongly
1876          * assembled fragments.
1877          *
1878          * Clear outstanding fragment when selecting a new
1879          * alternate setting.
1880          */
1881         spin_lock_irqsave(&data->rxlock, flags);
1882         kfree_skb(data->sco_skb);
1883         data->sco_skb = NULL;
1884         spin_unlock_irqrestore(&data->rxlock, flags);
1885 
1886         err = __set_isoc_interface(hdev, new_alts);
1887         if (err < 0)
1888             return err;
1889     }
1890 
1891     if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1892         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1893             clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1894         else
1895             btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1896     }
1897 
1898     return 0;
1899 }
1900 
1901 static struct usb_host_interface *btusb_find_altsetting(struct btusb_data *data,
1902                             int alt)
1903 {
1904     struct usb_interface *intf = data->isoc;
1905     int i;
1906 
1907     BT_DBG("Looking for Alt no :%d", alt);
1908 
1909     if (!intf)
1910         return NULL;
1911 
1912     for (i = 0; i < intf->num_altsetting; i++) {
1913         if (intf->altsetting[i].desc.bAlternateSetting == alt)
1914             return &intf->altsetting[i];
1915     }
1916 
1917     return NULL;
1918 }
1919 
1920 static void btusb_work(struct work_struct *work)
1921 {
1922     struct btusb_data *data = container_of(work, struct btusb_data, work);
1923     struct hci_dev *hdev = data->hdev;
1924     int new_alts = 0;
1925     int err;
1926 
1927     if (data->sco_num > 0) {
1928         if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1929             err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1930             if (err < 0) {
1931                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1932                 usb_kill_anchored_urbs(&data->isoc_anchor);
1933                 return;
1934             }
1935 
1936             set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1937         }
1938 
1939         if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_CVSD) {
1940             if (hdev->voice_setting & 0x0020) {
1941                 static const int alts[3] = { 2, 4, 5 };
1942 
1943                 new_alts = alts[data->sco_num - 1];
1944             } else {
1945                 new_alts = data->sco_num;
1946             }
1947         } else if (data->air_mode == HCI_NOTIFY_ENABLE_SCO_TRANSP) {
1948             /* Bluetooth USB spec recommends alt 6 (63 bytes), but
1949              * many adapters do not support it.  Alt 1 appears to
1950              * work for all adapters that do not have alt 6, and
1951              * which work with WBS at all.  Some devices prefer
1952              * alt 3 (HCI payload >= 60 Bytes let air packet
1953              * data satisfy 60 bytes), requiring
1954              * MTU >= 3 (packets) * 25 (size) - 3 (headers) = 72
1955              * see also Core spec 5, vol 4, B 2.1.1 & Table 2.1.
1956              */
1957             if (btusb_find_altsetting(data, 6))
1958                 new_alts = 6;
1959             else if (btusb_find_altsetting(data, 3) &&
1960                  hdev->sco_mtu >= 72 &&
1961                  test_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags))
1962                 new_alts = 3;
1963             else
1964                 new_alts = 1;
1965         }
1966 
1967         if (btusb_switch_alt_setting(hdev, new_alts) < 0)
1968             bt_dev_err(hdev, "set USB alt:(%d) failed!", new_alts);
1969     } else {
1970         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1971         usb_kill_anchored_urbs(&data->isoc_anchor);
1972 
1973         __set_isoc_interface(hdev, 0);
1974         if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1975             usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1976     }
1977 }
1978 
1979 static void btusb_waker(struct work_struct *work)
1980 {
1981     struct btusb_data *data = container_of(work, struct btusb_data, waker);
1982     int err;
1983 
1984     err = usb_autopm_get_interface(data->intf);
1985     if (err < 0)
1986         return;
1987 
1988     usb_autopm_put_interface(data->intf);
1989 }
1990 
1991 static void btusb_rx_work(struct work_struct *work)
1992 {
1993     struct btusb_data *data = container_of(work, struct btusb_data,
1994                            rx_work.work);
1995     struct sk_buff *skb;
1996 
1997     /* Dequeue ACL data received during the interval */
1998     while ((skb = skb_dequeue(&data->acl_q)))
1999         data->recv_acl(data->hdev, skb);
2000 }
2001 
2002 static int btusb_setup_bcm92035(struct hci_dev *hdev)
2003 {
2004     struct sk_buff *skb;
2005     u8 val = 0x00;
2006 
2007     BT_DBG("%s", hdev->name);
2008 
2009     skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
2010     if (IS_ERR(skb))
2011         bt_dev_err(hdev, "BCM92035 command failed (%ld)", PTR_ERR(skb));
2012     else
2013         kfree_skb(skb);
2014 
2015     return 0;
2016 }
2017 
2018 static int btusb_setup_csr(struct hci_dev *hdev)
2019 {
2020     struct btusb_data *data = hci_get_drvdata(hdev);
2021     u16 bcdDevice = le16_to_cpu(data->udev->descriptor.bcdDevice);
2022     struct hci_rp_read_local_version *rp;
2023     struct sk_buff *skb;
2024     bool is_fake = false;
2025     int ret;
2026 
2027     BT_DBG("%s", hdev->name);
2028 
2029     skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
2030                  HCI_INIT_TIMEOUT);
2031     if (IS_ERR(skb)) {
2032         int err = PTR_ERR(skb);
2033         bt_dev_err(hdev, "CSR: Local version failed (%d)", err);
2034         return err;
2035     }
2036 
2037     if (skb->len != sizeof(struct hci_rp_read_local_version)) {
2038         bt_dev_err(hdev, "CSR: Local version length mismatch");
2039         kfree_skb(skb);
2040         return -EIO;
2041     }
2042 
2043     rp = (struct hci_rp_read_local_version *)skb->data;
2044 
2045     /* Detect a wide host of Chinese controllers that aren't CSR.
2046      *
2047      * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891
2048      *
2049      * The main thing they have in common is that these are really popular low-cost
2050      * options that support newer Bluetooth versions but rely on heavy VID/PID
2051      * squatting of this poor old Bluetooth 1.1 device. Even sold as such.
2052      *
2053      * We detect actual CSR devices by checking that the HCI manufacturer code
2054      * is Cambridge Silicon Radio (10) and ensuring that LMP sub-version and
2055      * HCI rev values always match. As they both store the firmware number.
2056      */
2057     if (le16_to_cpu(rp->manufacturer) != 10 ||
2058         le16_to_cpu(rp->hci_rev) != le16_to_cpu(rp->lmp_subver))
2059         is_fake = true;
2060 
2061     /* Known legit CSR firmware build numbers and their supported BT versions:
2062      * - 1.1 (0x1) -> 0x0073, 0x020d, 0x033c, 0x034e
2063      * - 1.2 (0x2) ->                 0x04d9, 0x0529
2064      * - 2.0 (0x3) ->         0x07a6, 0x07ad, 0x0c5c
2065      * - 2.1 (0x4) ->         0x149c, 0x1735, 0x1899 (0x1899 is a BlueCore4-External)
2066      * - 4.0 (0x6) ->         0x1d86, 0x2031, 0x22bb
2067      *
2068      * e.g. Real CSR dongles with LMP subversion 0x73 are old enough that
2069      *      support BT 1.1 only; so it's a dead giveaway when some
2070      *      third-party BT 4.0 dongle reuses it.
2071      */
2072     else if (le16_to_cpu(rp->lmp_subver) <= 0x034e &&
2073          le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_1)
2074         is_fake = true;
2075 
2076     else if (le16_to_cpu(rp->lmp_subver) <= 0x0529 &&
2077          le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_1_2)
2078         is_fake = true;
2079 
2080     else if (le16_to_cpu(rp->lmp_subver) <= 0x0c5c &&
2081          le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_0)
2082         is_fake = true;
2083 
2084     else if (le16_to_cpu(rp->lmp_subver) <= 0x1899 &&
2085          le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_2_1)
2086         is_fake = true;
2087 
2088     else if (le16_to_cpu(rp->lmp_subver) <= 0x22bb &&
2089          le16_to_cpu(rp->hci_ver) > BLUETOOTH_VER_4_0)
2090         is_fake = true;
2091 
2092     /* Other clones which beat all the above checks */
2093     else if (bcdDevice == 0x0134 &&
2094          le16_to_cpu(rp->lmp_subver) == 0x0c5c &&
2095          le16_to_cpu(rp->hci_ver) == BLUETOOTH_VER_2_0)
2096         is_fake = true;
2097 
2098     if (is_fake) {
2099         bt_dev_warn(hdev, "CSR: Unbranded CSR clone detected; adding workarounds and force-suspending once...");
2100 
2101         /* Generally these clones have big discrepancies between
2102          * advertised features and what's actually supported.
2103          * Probably will need to be expanded in the future;
2104          * without these the controller will lock up.
2105          */
2106         set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2107         set_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks);
2108         set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks);
2109 
2110         /* Clear the reset quirk since this is not an actual
2111          * early Bluetooth 1.1 device from CSR.
2112          */
2113         clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2114         clear_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2115 
2116         /*
2117          * Special workaround for these BT 4.0 chip clones, and potentially more:
2118          *
2119          * - 0x0134: a Barrot 8041a02                 (HCI rev: 0x0810 sub: 0x1012)
2120          * - 0x7558: IC markings FR3191AHAL 749H15143 (HCI rev/sub-version: 0x0709)
2121          *
2122          * These controllers are really messed-up.
2123          *
2124          * 1. Their bulk RX endpoint will never report any data unless
2125          *    the device was suspended at least once (yes, really).
2126          * 2. They will not wakeup when autosuspended and receiving data
2127          *    on their bulk RX endpoint from e.g. a keyboard or mouse
2128          *    (IOW remote-wakeup support is broken for the bulk endpoint).
2129          *
2130          * To fix 1. enable runtime-suspend, force-suspend the
2131          * HCI and then wake-it up by disabling runtime-suspend.
2132          *
2133          * To fix 2. clear the HCI's can_wake flag, this way the HCI
2134          * will still be autosuspended when it is not open.
2135          *
2136          * --
2137          *
2138          * Because these are widespread problems we prefer generic solutions; so
2139          * apply this initialization quirk to every controller that gets here,
2140          * it should be harmless. The alternative is to not work at all.
2141          */
2142         pm_runtime_allow(&data->udev->dev);
2143 
2144         ret = pm_runtime_suspend(&data->udev->dev);
2145         if (ret >= 0)
2146             msleep(200);
2147         else
2148             bt_dev_warn(hdev, "CSR: Couldn't suspend the device for our Barrot 8041a02 receive-issue workaround");
2149 
2150         pm_runtime_forbid(&data->udev->dev);
2151 
2152         device_set_wakeup_capable(&data->udev->dev, false);
2153 
2154         /* Re-enable autosuspend if this was requested */
2155         if (enable_autosuspend)
2156             usb_enable_autosuspend(data->udev);
2157     }
2158 
2159     kfree_skb(skb);
2160 
2161     return 0;
2162 }
2163 
2164 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
2165 {
2166     struct sk_buff *skb;
2167     struct hci_event_hdr *hdr;
2168     struct hci_ev_cmd_complete *evt;
2169 
2170     skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
2171     if (!skb)
2172         return -ENOMEM;
2173 
2174     hdr = skb_put(skb, sizeof(*hdr));
2175     hdr->evt = HCI_EV_CMD_COMPLETE;
2176     hdr->plen = sizeof(*evt) + 1;
2177 
2178     evt = skb_put(skb, sizeof(*evt));
2179     evt->ncmd = 0x01;
2180     evt->opcode = cpu_to_le16(opcode);
2181 
2182     skb_put_u8(skb, 0x00);
2183 
2184     hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2185 
2186     return hci_recv_frame(hdev, skb);
2187 }
2188 
2189 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
2190                  int count)
2191 {
2192     struct hci_dev *hdev = data->hdev;
2193 
2194     /* When the device is in bootloader mode, then it can send
2195      * events via the bulk endpoint. These events are treated the
2196      * same way as the ones received from the interrupt endpoint.
2197      */
2198     if (btintel_test_flag(hdev, INTEL_BOOTLOADER))
2199         return btusb_recv_intr(data, buffer, count);
2200 
2201     return btusb_recv_bulk(data, buffer, count);
2202 }
2203 
2204 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
2205 {
2206     if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2207         struct hci_event_hdr *hdr = (void *)skb->data;
2208 
2209         if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
2210             hdr->plen > 0) {
2211             const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
2212             unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
2213 
2214             switch (skb->data[2]) {
2215             case 0x02:
2216                 /* When switching to the operational firmware
2217                  * the device sends a vendor specific event
2218                  * indicating that the bootup completed.
2219                  */
2220                 btintel_bootup(hdev, ptr, len);
2221                 break;
2222             case 0x06:
2223                 /* When the firmware loading completes the
2224                  * device sends out a vendor specific event
2225                  * indicating the result of the firmware
2226                  * loading.
2227                  */
2228                 btintel_secure_send_result(hdev, ptr, len);
2229                 break;
2230             }
2231         }
2232     }
2233 
2234     return hci_recv_frame(hdev, skb);
2235 }
2236 
2237 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
2238 {
2239     struct urb *urb;
2240 
2241     BT_DBG("%s", hdev->name);
2242 
2243     switch (hci_skb_pkt_type(skb)) {
2244     case HCI_COMMAND_PKT:
2245         if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
2246             struct hci_command_hdr *cmd = (void *)skb->data;
2247             __u16 opcode = le16_to_cpu(cmd->opcode);
2248 
2249             /* When in bootloader mode and the command 0xfc09
2250              * is received, it needs to be send down the
2251              * bulk endpoint. So allocate a bulk URB instead.
2252              */
2253             if (opcode == 0xfc09)
2254                 urb = alloc_bulk_urb(hdev, skb);
2255             else
2256                 urb = alloc_ctrl_urb(hdev, skb);
2257 
2258             /* When the 0xfc01 command is issued to boot into
2259              * the operational firmware, it will actually not
2260              * send a command complete event. To keep the flow
2261              * control working inject that event here.
2262              */
2263             if (opcode == 0xfc01)
2264                 inject_cmd_complete(hdev, opcode);
2265         } else {
2266             urb = alloc_ctrl_urb(hdev, skb);
2267         }
2268         if (IS_ERR(urb))
2269             return PTR_ERR(urb);
2270 
2271         hdev->stat.cmd_tx++;
2272         return submit_or_queue_tx_urb(hdev, urb);
2273 
2274     case HCI_ACLDATA_PKT:
2275         urb = alloc_bulk_urb(hdev, skb);
2276         if (IS_ERR(urb))
2277             return PTR_ERR(urb);
2278 
2279         hdev->stat.acl_tx++;
2280         return submit_or_queue_tx_urb(hdev, urb);
2281 
2282     case HCI_SCODATA_PKT:
2283         if (hci_conn_num(hdev, SCO_LINK) < 1)
2284             return -ENODEV;
2285 
2286         urb = alloc_isoc_urb(hdev, skb);
2287         if (IS_ERR(urb))
2288             return PTR_ERR(urb);
2289 
2290         hdev->stat.sco_tx++;
2291         return submit_tx_urb(hdev, urb);
2292 
2293     case HCI_ISODATA_PKT:
2294         urb = alloc_bulk_urb(hdev, skb);
2295         if (IS_ERR(urb))
2296             return PTR_ERR(urb);
2297 
2298         return submit_or_queue_tx_urb(hdev, urb);
2299     }
2300 
2301     return -EILSEQ;
2302 }
2303 
2304 /* UHW CR mapping */
2305 #define MTK_BT_MISC     0x70002510
2306 #define MTK_BT_SUBSYS_RST   0x70002610
2307 #define MTK_UDMA_INT_STA_BT 0x74000024
2308 #define MTK_UDMA_INT_STA_BT1    0x74000308
2309 #define MTK_BT_WDT_STATUS   0x740003A0
2310 #define MTK_EP_RST_OPT      0x74011890
2311 #define MTK_EP_RST_IN_OUT_OPT   0x00010001
2312 #define MTK_BT_RST_DONE     0x00000100
2313 #define MTK_BT_RESET_WAIT_MS    100
2314 #define MTK_BT_RESET_NUM_TRIES  10
2315 
2316 static void btusb_mtk_wmt_recv(struct urb *urb)
2317 {
2318     struct hci_dev *hdev = urb->context;
2319     struct btusb_data *data = hci_get_drvdata(hdev);
2320     struct sk_buff *skb;
2321     int err;
2322 
2323     if (urb->status == 0 && urb->actual_length > 0) {
2324         hdev->stat.byte_rx += urb->actual_length;
2325 
2326         /* WMT event shouldn't be fragmented and the size should be
2327          * less than HCI_WMT_MAX_EVENT_SIZE.
2328          */
2329         skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
2330         if (!skb) {
2331             hdev->stat.err_rx++;
2332             kfree(urb->setup_packet);
2333             return;
2334         }
2335 
2336         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2337         skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
2338 
2339         /* When someone waits for the WMT event, the skb is being cloned
2340          * and being processed the events from there then.
2341          */
2342         if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
2343             data->evt_skb = skb_clone(skb, GFP_ATOMIC);
2344             if (!data->evt_skb) {
2345                 kfree_skb(skb);
2346                 kfree(urb->setup_packet);
2347                 return;
2348             }
2349         }
2350 
2351         err = hci_recv_frame(hdev, skb);
2352         if (err < 0) {
2353             kfree_skb(data->evt_skb);
2354             data->evt_skb = NULL;
2355             kfree(urb->setup_packet);
2356             return;
2357         }
2358 
2359         if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
2360                        &data->flags)) {
2361             /* Barrier to sync with other CPUs */
2362             smp_mb__after_atomic();
2363             wake_up_bit(&data->flags,
2364                     BTUSB_TX_WAIT_VND_EVT);
2365         }
2366         kfree(urb->setup_packet);
2367         return;
2368     } else if (urb->status == -ENOENT) {
2369         /* Avoid suspend failed when usb_kill_urb */
2370         return;
2371     }
2372 
2373     usb_mark_last_busy(data->udev);
2374 
2375     /* The URB complete handler is still called with urb->actual_length = 0
2376      * when the event is not available, so we should keep re-submitting
2377      * URB until WMT event returns, Also, It's necessary to wait some time
2378      * between the two consecutive control URBs to relax the target device
2379      * to generate the event. Otherwise, the WMT event cannot return from
2380      * the device successfully.
2381      */
2382     udelay(500);
2383 
2384     usb_anchor_urb(urb, &data->ctrl_anchor);
2385     err = usb_submit_urb(urb, GFP_ATOMIC);
2386     if (err < 0) {
2387         kfree(urb->setup_packet);
2388         /* -EPERM: urb is being killed;
2389          * -ENODEV: device got disconnected
2390          */
2391         if (err != -EPERM && err != -ENODEV)
2392             bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
2393                    urb, -err);
2394         usb_unanchor_urb(urb);
2395     }
2396 }
2397 
2398 static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
2399 {
2400     struct btusb_data *data = hci_get_drvdata(hdev);
2401     struct usb_ctrlrequest *dr;
2402     unsigned char *buf;
2403     int err, size = 64;
2404     unsigned int pipe;
2405     struct urb *urb;
2406 
2407     urb = usb_alloc_urb(0, GFP_KERNEL);
2408     if (!urb)
2409         return -ENOMEM;
2410 
2411     dr = kmalloc(sizeof(*dr), GFP_KERNEL);
2412     if (!dr) {
2413         usb_free_urb(urb);
2414         return -ENOMEM;
2415     }
2416 
2417     dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
2418     dr->bRequest     = 1;
2419     dr->wIndex       = cpu_to_le16(0);
2420     dr->wValue       = cpu_to_le16(48);
2421     dr->wLength      = cpu_to_le16(size);
2422 
2423     buf = kmalloc(size, GFP_KERNEL);
2424     if (!buf) {
2425         kfree(dr);
2426         usb_free_urb(urb);
2427         return -ENOMEM;
2428     }
2429 
2430     pipe = usb_rcvctrlpipe(data->udev, 0);
2431 
2432     usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
2433                  buf, size, btusb_mtk_wmt_recv, hdev);
2434 
2435     urb->transfer_flags |= URB_FREE_BUFFER;
2436 
2437     usb_anchor_urb(urb, &data->ctrl_anchor);
2438     err = usb_submit_urb(urb, GFP_KERNEL);
2439     if (err < 0) {
2440         if (err != -EPERM && err != -ENODEV)
2441             bt_dev_err(hdev, "urb %p submission failed (%d)",
2442                    urb, -err);
2443         usb_unanchor_urb(urb);
2444     }
2445 
2446     usb_free_urb(urb);
2447 
2448     return err;
2449 }
2450 
2451 static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
2452                   struct btmtk_hci_wmt_params *wmt_params)
2453 {
2454     struct btusb_data *data = hci_get_drvdata(hdev);
2455     struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
2456     u32 hlen, status = BTMTK_WMT_INVALID;
2457     struct btmtk_hci_wmt_evt *wmt_evt;
2458     struct btmtk_hci_wmt_cmd *wc;
2459     struct btmtk_wmt_hdr *hdr;
2460     int err;
2461 
2462     /* Send the WMT command and wait until the WMT event returns */
2463     hlen = sizeof(*hdr) + wmt_params->dlen;
2464     if (hlen > 255)
2465         return -EINVAL;
2466 
2467     wc = kzalloc(hlen, GFP_KERNEL);
2468     if (!wc)
2469         return -ENOMEM;
2470 
2471     hdr = &wc->hdr;
2472     hdr->dir = 1;
2473     hdr->op = wmt_params->op;
2474     hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
2475     hdr->flag = wmt_params->flag;
2476     memcpy(wc->data, wmt_params->data, wmt_params->dlen);
2477 
2478     set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2479 
2480     err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
2481 
2482     if (err < 0) {
2483         clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2484         goto err_free_wc;
2485     }
2486 
2487     /* Submit control IN URB on demand to process the WMT event */
2488     err = btusb_mtk_submit_wmt_recv_urb(hdev);
2489     if (err < 0)
2490         goto err_free_wc;
2491 
2492     /* The vendor specific WMT commands are all answered by a vendor
2493      * specific event and will have the Command Status or Command
2494      * Complete as with usual HCI command flow control.
2495      *
2496      * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
2497      * state to be cleared. The driver specific event receive routine
2498      * will clear that state and with that indicate completion of the
2499      * WMT command.
2500      */
2501     err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
2502                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
2503     if (err == -EINTR) {
2504         bt_dev_err(hdev, "Execution of wmt command interrupted");
2505         clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2506         goto err_free_wc;
2507     }
2508 
2509     if (err) {
2510         bt_dev_err(hdev, "Execution of wmt command timed out");
2511         clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
2512         err = -ETIMEDOUT;
2513         goto err_free_wc;
2514     }
2515 
2516     /* Parse and handle the return WMT event */
2517     wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
2518     if (wmt_evt->whdr.op != hdr->op) {
2519         bt_dev_err(hdev, "Wrong op received %d expected %d",
2520                wmt_evt->whdr.op, hdr->op);
2521         err = -EIO;
2522         goto err_free_skb;
2523     }
2524 
2525     switch (wmt_evt->whdr.op) {
2526     case BTMTK_WMT_SEMAPHORE:
2527         if (wmt_evt->whdr.flag == 2)
2528             status = BTMTK_WMT_PATCH_UNDONE;
2529         else
2530             status = BTMTK_WMT_PATCH_DONE;
2531         break;
2532     case BTMTK_WMT_FUNC_CTRL:
2533         wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
2534         if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
2535             status = BTMTK_WMT_ON_DONE;
2536         else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
2537             status = BTMTK_WMT_ON_PROGRESS;
2538         else
2539             status = BTMTK_WMT_ON_UNDONE;
2540         break;
2541     case BTMTK_WMT_PATCH_DWNLD:
2542         if (wmt_evt->whdr.flag == 2)
2543             status = BTMTK_WMT_PATCH_DONE;
2544         else if (wmt_evt->whdr.flag == 1)
2545             status = BTMTK_WMT_PATCH_PROGRESS;
2546         else
2547             status = BTMTK_WMT_PATCH_UNDONE;
2548         break;
2549     }
2550 
2551     if (wmt_params->status)
2552         *wmt_params->status = status;
2553 
2554 err_free_skb:
2555     kfree_skb(data->evt_skb);
2556     data->evt_skb = NULL;
2557 err_free_wc:
2558     kfree(wc);
2559     return err;
2560 }
2561 
2562 static int btusb_mtk_func_query(struct hci_dev *hdev)
2563 {
2564     struct btmtk_hci_wmt_params wmt_params;
2565     int status, err;
2566     u8 param = 0;
2567 
2568     /* Query whether the function is enabled */
2569     wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2570     wmt_params.flag = 4;
2571     wmt_params.dlen = sizeof(param);
2572     wmt_params.data = &param;
2573     wmt_params.status = &status;
2574 
2575     err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2576     if (err < 0) {
2577         bt_dev_err(hdev, "Failed to query function status (%d)", err);
2578         return err;
2579     }
2580 
2581     return status;
2582 }
2583 
2584 static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
2585 {
2586     struct hci_dev *hdev = data->hdev;
2587     int pipe, err;
2588     void *buf;
2589 
2590     buf = kzalloc(4, GFP_KERNEL);
2591     if (!buf)
2592         return -ENOMEM;
2593 
2594     put_unaligned_le32(val, buf);
2595 
2596     pipe = usb_sndctrlpipe(data->udev, 0);
2597     err = usb_control_msg(data->udev, pipe, 0x02,
2598                   0x5E,
2599                   reg >> 16, reg & 0xffff,
2600                   buf, 4, USB_CTRL_SET_TIMEOUT);
2601     if (err < 0) {
2602         bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
2603         goto err_free_buf;
2604     }
2605 
2606 err_free_buf:
2607     kfree(buf);
2608 
2609     return err;
2610 }
2611 
2612 static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2613 {
2614     struct hci_dev *hdev = data->hdev;
2615     int pipe, err;
2616     void *buf;
2617 
2618     buf = kzalloc(4, GFP_KERNEL);
2619     if (!buf)
2620         return -ENOMEM;
2621 
2622     pipe = usb_rcvctrlpipe(data->udev, 0);
2623     err = usb_control_msg(data->udev, pipe, 0x01,
2624                   0xDE,
2625                   reg >> 16, reg & 0xffff,
2626                   buf, 4, USB_CTRL_SET_TIMEOUT);
2627     if (err < 0) {
2628         bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
2629         goto err_free_buf;
2630     }
2631 
2632     *val = get_unaligned_le32(buf);
2633     bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
2634 
2635 err_free_buf:
2636     kfree(buf);
2637 
2638     return err;
2639 }
2640 
2641 static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
2642 {
2643     int pipe, err, size = sizeof(u32);
2644     void *buf;
2645 
2646     buf = kzalloc(size, GFP_KERNEL);
2647     if (!buf)
2648         return -ENOMEM;
2649 
2650     pipe = usb_rcvctrlpipe(data->udev, 0);
2651     err = usb_control_msg(data->udev, pipe, 0x63,
2652                   USB_TYPE_VENDOR | USB_DIR_IN,
2653                   reg >> 16, reg & 0xffff,
2654                   buf, size, USB_CTRL_SET_TIMEOUT);
2655     if (err < 0)
2656         goto err_free_buf;
2657 
2658     *val = get_unaligned_le32(buf);
2659 
2660 err_free_buf:
2661     kfree(buf);
2662 
2663     return err;
2664 }
2665 
2666 static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
2667 {
2668     return btusb_mtk_reg_read(data, reg, id);
2669 }
2670 
2671 static int btusb_mtk_setup(struct hci_dev *hdev)
2672 {
2673     struct btusb_data *data = hci_get_drvdata(hdev);
2674     struct btmtk_hci_wmt_params wmt_params;
2675     ktime_t calltime, delta, rettime;
2676     struct btmtk_tci_sleep tci_sleep;
2677     unsigned long long duration;
2678     struct sk_buff *skb;
2679     const char *fwname;
2680     int err, status;
2681     u32 dev_id;
2682     char fw_bin_name[64];
2683     u32 fw_version = 0;
2684     u8 param;
2685 
2686     calltime = ktime_get();
2687 
2688     err = btusb_mtk_id_get(data, 0x80000008, &dev_id);
2689     if (err < 0) {
2690         bt_dev_err(hdev, "Failed to get device id (%d)", err);
2691         return err;
2692     }
2693 
2694     if (!dev_id) {
2695         err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
2696         if (err < 0) {
2697             bt_dev_err(hdev, "Failed to get device id (%d)", err);
2698             return err;
2699         }
2700         err = btusb_mtk_id_get(data, 0x80021004, &fw_version);
2701         if (err < 0) {
2702             bt_dev_err(hdev, "Failed to get fw version (%d)", err);
2703             return err;
2704         }
2705     }
2706 
2707     switch (dev_id) {
2708     case 0x7663:
2709         fwname = FIRMWARE_MT7663;
2710         break;
2711     case 0x7668:
2712         fwname = FIRMWARE_MT7668;
2713         break;
2714     case 0x7922:
2715     case 0x7961:
2716         snprintf(fw_bin_name, sizeof(fw_bin_name),
2717             "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
2718              dev_id & 0xffff, (fw_version & 0xff) + 1);
2719         err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
2720                         btusb_mtk_hci_wmt_sync);
2721         if (err < 0) {
2722             bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
2723             return err;
2724         }
2725 
2726         /* It's Device EndPoint Reset Option Register */
2727         btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2728 
2729         /* Enable Bluetooth protocol */
2730         param = 1;
2731         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2732         wmt_params.flag = 0;
2733         wmt_params.dlen = sizeof(param);
2734         wmt_params.data = &param;
2735         wmt_params.status = NULL;
2736 
2737         err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2738         if (err < 0) {
2739             bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2740             return err;
2741         }
2742 
2743         hci_set_msft_opcode(hdev, 0xFD30);
2744         hci_set_aosp_capable(hdev);
2745         goto done;
2746     default:
2747         bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
2748                dev_id);
2749         return -ENODEV;
2750     }
2751 
2752     /* Query whether the firmware is already download */
2753     wmt_params.op = BTMTK_WMT_SEMAPHORE;
2754     wmt_params.flag = 1;
2755     wmt_params.dlen = 0;
2756     wmt_params.data = NULL;
2757     wmt_params.status = &status;
2758 
2759     err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2760     if (err < 0) {
2761         bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
2762         return err;
2763     }
2764 
2765     if (status == BTMTK_WMT_PATCH_DONE) {
2766         bt_dev_info(hdev, "firmware already downloaded");
2767         goto ignore_setup_fw;
2768     }
2769 
2770     /* Setup a firmware which the device definitely requires */
2771     err = btmtk_setup_firmware(hdev, fwname,
2772                    btusb_mtk_hci_wmt_sync);
2773     if (err < 0)
2774         return err;
2775 
2776 ignore_setup_fw:
2777     err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
2778                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
2779                  2000, 5000000);
2780     /* -ETIMEDOUT happens */
2781     if (err < 0)
2782         return err;
2783 
2784     /* The other errors happen in btusb_mtk_func_query */
2785     if (status < 0)
2786         return status;
2787 
2788     if (status == BTMTK_WMT_ON_DONE) {
2789         bt_dev_info(hdev, "function already on");
2790         goto ignore_func_on;
2791     }
2792 
2793     /* Enable Bluetooth protocol */
2794     param = 1;
2795     wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2796     wmt_params.flag = 0;
2797     wmt_params.dlen = sizeof(param);
2798     wmt_params.data = &param;
2799     wmt_params.status = NULL;
2800 
2801     err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2802     if (err < 0) {
2803         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2804         return err;
2805     }
2806 
2807 ignore_func_on:
2808     /* Apply the low power environment setup */
2809     tci_sleep.mode = 0x5;
2810     tci_sleep.duration = cpu_to_le16(0x640);
2811     tci_sleep.host_duration = cpu_to_le16(0x640);
2812     tci_sleep.host_wakeup_pin = 0;
2813     tci_sleep.time_compensation = 0;
2814 
2815     skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
2816                  HCI_INIT_TIMEOUT);
2817     if (IS_ERR(skb)) {
2818         err = PTR_ERR(skb);
2819         bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
2820         return err;
2821     }
2822     kfree_skb(skb);
2823 
2824 done:
2825     rettime = ktime_get();
2826     delta = ktime_sub(rettime, calltime);
2827     duration = (unsigned long long)ktime_to_ns(delta) >> 10;
2828 
2829     bt_dev_info(hdev, "Device setup in %llu usecs", duration);
2830 
2831     return 0;
2832 }
2833 
2834 static int btusb_mtk_shutdown(struct hci_dev *hdev)
2835 {
2836     struct btmtk_hci_wmt_params wmt_params;
2837     u8 param = 0;
2838     int err;
2839 
2840     /* Disable the device */
2841     wmt_params.op = BTMTK_WMT_FUNC_CTRL;
2842     wmt_params.flag = 0;
2843     wmt_params.dlen = sizeof(param);
2844     wmt_params.data = &param;
2845     wmt_params.status = NULL;
2846 
2847     err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
2848     if (err < 0) {
2849         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
2850         return err;
2851     }
2852 
2853     return 0;
2854 }
2855 
2856 static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
2857 {
2858     struct btusb_data *data = hci_get_drvdata(hdev);
2859     u32 val;
2860     int err, retry = 0;
2861 
2862     /* It's MediaTek specific bluetooth reset mechanism via USB */
2863     if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
2864         bt_dev_err(hdev, "last reset failed? Not resetting again");
2865         return;
2866     }
2867 
2868     err = usb_autopm_get_interface(data->intf);
2869     if (err < 0)
2870         return;
2871 
2872     btusb_stop_traffic(data);
2873     usb_kill_anchored_urbs(&data->tx_anchor);
2874 
2875     /* It's Device EndPoint Reset Option Register */
2876     bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
2877     btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
2878     btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
2879 
2880     /* Reset the bluetooth chip via USB interface. */
2881     btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
2882     btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
2883     btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
2884     btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
2885     btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
2886     /* MT7921 need to delay 20ms between toggle reset bit */
2887     msleep(20);
2888     btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
2889     btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
2890 
2891     /* Poll the register until reset is completed */
2892     do {
2893         btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
2894         if (val & MTK_BT_RST_DONE) {
2895             bt_dev_dbg(hdev, "Bluetooth Reset Successfully");
2896             break;
2897         }
2898 
2899         bt_dev_dbg(hdev, "Polling Bluetooth Reset CR");
2900         retry++;
2901         msleep(MTK_BT_RESET_WAIT_MS);
2902     } while (retry < MTK_BT_RESET_NUM_TRIES);
2903 
2904     btusb_mtk_id_get(data, 0x70010200, &val);
2905     if (!val)
2906         bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
2907 
2908     usb_queue_reset_device(data->intf);
2909 
2910     clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
2911 }
2912 
2913 static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
2914 {
2915     struct btusb_data *data = hci_get_drvdata(hdev);
2916     u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
2917 
2918     switch (handle) {
2919     case 0xfc6f:        /* Firmware dump from device */
2920         /* When the firmware hangs, the device can no longer
2921          * suspend and thus disable auto-suspend.
2922          */
2923         usb_disable_autosuspend(data->udev);
2924         fallthrough;
2925     case 0x05ff:        /* Firmware debug logging 1 */
2926     case 0x05fe:        /* Firmware debug logging 2 */
2927         return hci_recv_diag(hdev, skb);
2928     }
2929 
2930     return hci_recv_frame(hdev, skb);
2931 }
2932 
2933 #ifdef CONFIG_PM
2934 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
2935 static int marvell_config_oob_wake(struct hci_dev *hdev)
2936 {
2937     struct sk_buff *skb;
2938     struct btusb_data *data = hci_get_drvdata(hdev);
2939     struct device *dev = &data->udev->dev;
2940     u16 pin, gap, opcode;
2941     int ret;
2942     u8 cmd[5];
2943 
2944     /* Move on if no wakeup pin specified */
2945     if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) ||
2946         of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
2947         return 0;
2948 
2949     /* Vendor specific command to configure a GPIO as wake-up pin */
2950     opcode = hci_opcode_pack(0x3F, 0x59);
2951     cmd[0] = opcode & 0xFF;
2952     cmd[1] = opcode >> 8;
2953     cmd[2] = 2; /* length of parameters that follow */
2954     cmd[3] = pin;
2955     cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */
2956 
2957     skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
2958     if (!skb) {
2959         bt_dev_err(hdev, "%s: No memory", __func__);
2960         return -ENOMEM;
2961     }
2962 
2963     skb_put_data(skb, cmd, sizeof(cmd));
2964     hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
2965 
2966     ret = btusb_send_frame(hdev, skb);
2967     if (ret) {
2968         bt_dev_err(hdev, "%s: configuration failed", __func__);
2969         kfree_skb(skb);
2970         return ret;
2971     }
2972 
2973     return 0;
2974 }
2975 #endif
2976 
2977 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2978                     const bdaddr_t *bdaddr)
2979 {
2980     struct sk_buff *skb;
2981     u8 buf[8];
2982     long ret;
2983 
2984     buf[0] = 0xfe;
2985     buf[1] = sizeof(bdaddr_t);
2986     memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2987 
2988     skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2989     if (IS_ERR(skb)) {
2990         ret = PTR_ERR(skb);
2991         bt_dev_err(hdev, "changing Marvell device address failed (%ld)",
2992                ret);
2993         return ret;
2994     }
2995     kfree_skb(skb);
2996 
2997     return 0;
2998 }
2999 
3000 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
3001                     const bdaddr_t *bdaddr)
3002 {
3003     struct sk_buff *skb;
3004     u8 buf[10];
3005     long ret;
3006 
3007     buf[0] = 0x01;
3008     buf[1] = 0x01;
3009     buf[2] = 0x00;
3010     buf[3] = sizeof(bdaddr_t);
3011     memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
3012 
3013     skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
3014     if (IS_ERR(skb)) {
3015         ret = PTR_ERR(skb);
3016         bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3017         return ret;
3018     }
3019     kfree_skb(skb);
3020 
3021     return 0;
3022 }
3023 
3024 static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
3025                 const bdaddr_t *bdaddr)
3026 {
3027     struct sk_buff *skb;
3028     u8 buf[6];
3029     long ret;
3030 
3031     memcpy(buf, bdaddr, sizeof(bdaddr_t));
3032 
3033     skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
3034                 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
3035     if (IS_ERR(skb)) {
3036         ret = PTR_ERR(skb);
3037         bt_dev_err(hdev, "Change address command failed (%ld)", ret);
3038         return ret;
3039     }
3040     kfree_skb(skb);
3041 
3042     return 0;
3043 }
3044 
3045 #define QCA_DFU_PACKET_LEN  4096
3046 
3047 #define QCA_GET_TARGET_VERSION  0x09
3048 #define QCA_CHECK_STATUS    0x05
3049 #define QCA_DFU_DOWNLOAD    0x01
3050 
3051 #define QCA_SYSCFG_UPDATED  0x40
3052 #define QCA_PATCH_UPDATED   0x80
3053 #define QCA_DFU_TIMEOUT     3000
3054 #define QCA_FLAG_MULTI_NVM      0x80
3055 #define QCA_BT_RESET_WAIT_MS    100
3056 
3057 #define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
3058 #define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
3059 
3060 struct qca_version {
3061     __le32  rom_version;
3062     __le32  patch_version;
3063     __le32  ram_version;
3064     __u8    chip_id;
3065     __u8    platform_id;
3066     __le16  flag;
3067     __u8    reserved[4];
3068 } __packed;
3069 
3070 struct qca_rampatch_version {
3071     __le16  rom_version_high;
3072     __le16  rom_version_low;
3073     __le16  patch_version;
3074 } __packed;
3075 
3076 struct qca_device_info {
3077     u32 rom_version;
3078     u8  rampatch_hdr;   /* length of header in rampatch */
3079     u8  nvm_hdr;    /* length of header in NVM */
3080     u8  ver_offset; /* offset of version structure in rampatch */
3081 };
3082 
3083 static const struct qca_device_info qca_devices_table[] = {
3084     { 0x00000100, 20, 4,  8 }, /* Rome 1.0 */
3085     { 0x00000101, 20, 4,  8 }, /* Rome 1.1 */
3086     { 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
3087     { 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
3088     { 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
3089     { 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
3090     { 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
3091     { 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
3092     { 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
3093     { 0x00190200, 40, 4, 16 }, /* WCN785x 2.0 */
3094 };
3095 
3096 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
3097                      void *data, u16 size)
3098 {
3099     int pipe, err;
3100     u8 *buf;
3101 
3102     buf = kmalloc(size, GFP_KERNEL);
3103     if (!buf)
3104         return -ENOMEM;
3105 
3106     /* Found some of USB hosts have IOT issues with ours so that we should
3107      * not wait until HCI layer is ready.
3108      */
3109     pipe = usb_rcvctrlpipe(udev, 0);
3110     err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
3111                   0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3112     if (err < 0) {
3113         dev_err(&udev->dev, "Failed to access otp area (%d)", err);
3114         goto done;
3115     }
3116 
3117     memcpy(data, buf, size);
3118 
3119 done:
3120     kfree(buf);
3121 
3122     return err;
3123 }
3124 
3125 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
3126                        const struct firmware *firmware,
3127                        size_t hdr_size)
3128 {
3129     struct btusb_data *btdata = hci_get_drvdata(hdev);
3130     struct usb_device *udev = btdata->udev;
3131     size_t count, size, sent = 0;
3132     int pipe, len, err;
3133     u8 *buf;
3134 
3135     buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
3136     if (!buf)
3137         return -ENOMEM;
3138 
3139     count = firmware->size;
3140 
3141     size = min_t(size_t, count, hdr_size);
3142     memcpy(buf, firmware->data, size);
3143 
3144     /* USB patches should go down to controller through USB path
3145      * because binary format fits to go down through USB channel.
3146      * USB control path is for patching headers and USB bulk is for
3147      * patch body.
3148      */
3149     pipe = usb_sndctrlpipe(udev, 0);
3150     err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
3151                   0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
3152     if (err < 0) {
3153         bt_dev_err(hdev, "Failed to send headers (%d)", err);
3154         goto done;
3155     }
3156 
3157     sent += size;
3158     count -= size;
3159 
3160     /* ep2 need time to switch from function acl to function dfu,
3161      * so we add 20ms delay here.
3162      */
3163     msleep(20);
3164 
3165     while (count) {
3166         size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
3167 
3168         memcpy(buf, firmware->data + sent, size);
3169 
3170         pipe = usb_sndbulkpipe(udev, 0x02);
3171         err = usb_bulk_msg(udev, pipe, buf, size, &len,
3172                    QCA_DFU_TIMEOUT);
3173         if (err < 0) {
3174             bt_dev_err(hdev, "Failed to send body at %zd of %zd (%d)",
3175                    sent, firmware->size, err);
3176             break;
3177         }
3178 
3179         if (size != len) {
3180             bt_dev_err(hdev, "Failed to get bulk buffer");
3181             err = -EILSEQ;
3182             break;
3183         }
3184 
3185         sent  += size;
3186         count -= size;
3187     }
3188 
3189 done:
3190     kfree(buf);
3191     return err;
3192 }
3193 
3194 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
3195                      struct qca_version *ver,
3196                      const struct qca_device_info *info)
3197 {
3198     struct qca_rampatch_version *rver;
3199     const struct firmware *fw;
3200     u32 ver_rom, ver_patch, rver_rom;
3201     u16 rver_rom_low, rver_rom_high, rver_patch;
3202     char fwname[64];
3203     int err;
3204 
3205     ver_rom = le32_to_cpu(ver->rom_version);
3206     ver_patch = le32_to_cpu(ver->patch_version);
3207 
3208     snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
3209 
3210     err = request_firmware(&fw, fwname, &hdev->dev);
3211     if (err) {
3212         bt_dev_err(hdev, "failed to request rampatch file: %s (%d)",
3213                fwname, err);
3214         return err;
3215     }
3216 
3217     bt_dev_info(hdev, "using rampatch file: %s", fwname);
3218 
3219     rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
3220     rver_rom_low = le16_to_cpu(rver->rom_version_low);
3221     rver_patch = le16_to_cpu(rver->patch_version);
3222 
3223     if (ver_rom & ~0xffffU) {
3224         rver_rom_high = le16_to_cpu(rver->rom_version_high);
3225         rver_rom = le32_to_cpu(rver_rom_high << 16 | rver_rom_low);
3226     } else {
3227         rver_rom = rver_rom_low;
3228     }
3229 
3230     bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
3231             "firmware rome 0x%x build 0x%x",
3232             rver_rom, rver_patch, ver_rom, ver_patch);
3233 
3234     if (rver_rom != ver_rom || rver_patch <= ver_patch) {
3235         bt_dev_err(hdev, "rampatch file version did not match with firmware");
3236         err = -EINVAL;
3237         goto done;
3238     }
3239 
3240     err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
3241 
3242 done:
3243     release_firmware(fw);
3244 
3245     return err;
3246 }
3247 
3248 static void btusb_generate_qca_nvm_name(char *fwname, size_t max_size,
3249                     const struct qca_version *ver)
3250 {
3251     u32 rom_version = le32_to_cpu(ver->rom_version);
3252     u16 flag = le16_to_cpu(ver->flag);
3253 
3254     if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
3255         /* The board_id should be split into two bytes
3256          * The 1st byte is chip ID, and the 2nd byte is platform ID
3257          * For example, board ID 0x010A, 0x01 is platform ID. 0x0A is chip ID
3258          * we have several platforms, and platform IDs are continuously added
3259          * Platform ID:
3260          * 0x00 is for Mobile
3261          * 0x01 is for X86
3262          * 0x02 is for Automotive
3263          * 0x03 is for Consumer electronic
3264          */
3265         u16 board_id = (ver->chip_id << 8) + ver->platform_id;
3266         const char *variant;
3267 
3268         switch (le32_to_cpu(ver->ram_version)) {
3269         case WCN6855_2_0_RAM_VERSION_GF:
3270         case WCN6855_2_1_RAM_VERSION_GF:
3271             variant = "_gf";
3272             break;
3273         default:
3274             variant = "";
3275             break;
3276         }
3277 
3278         if (board_id == 0) {
3279             snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
3280                 rom_version, variant);
3281         } else {
3282             snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
3283                 rom_version, variant, board_id);
3284         }
3285     } else {
3286         snprintf(fwname, max_size, "qca/nvm_usb_%08x.bin",
3287             rom_version);
3288     }
3289 
3290 }
3291 
3292 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
3293                     struct qca_version *ver,
3294                     const struct qca_device_info *info)
3295 {
3296     const struct firmware *fw;
3297     char fwname[64];
3298     int err;
3299 
3300     btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);
3301 
3302     err = request_firmware(&fw, fwname, &hdev->dev);
3303     if (err) {
3304         bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
3305                fwname, err);
3306         return err;
3307     }
3308 
3309     bt_dev_info(hdev, "using NVM file: %s", fwname);
3310 
3311     err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
3312 
3313     release_firmware(fw);
3314 
3315     return err;
3316 }
3317 
3318 /* identify the ROM version and check whether patches are needed */
3319 static bool btusb_qca_need_patch(struct usb_device *udev)
3320 {
3321     struct qca_version ver;
3322 
3323     if (btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3324                       sizeof(ver)) < 0)
3325         return false;
3326     /* only low ROM versions need patches */
3327     return !(le32_to_cpu(ver.rom_version) & ~0xffffU);
3328 }
3329 
3330 static int btusb_setup_qca(struct hci_dev *hdev)
3331 {
3332     struct btusb_data *btdata = hci_get_drvdata(hdev);
3333     struct usb_device *udev = btdata->udev;
3334     const struct qca_device_info *info = NULL;
3335     struct qca_version ver;
3336     u32 ver_rom;
3337     u8 status;
3338     int i, err;
3339 
3340     err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3341                     sizeof(ver));
3342     if (err < 0)
3343         return err;
3344 
3345     ver_rom = le32_to_cpu(ver.rom_version);
3346 
3347     for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
3348         if (ver_rom == qca_devices_table[i].rom_version)
3349             info = &qca_devices_table[i];
3350     }
3351     if (!info) {
3352         /* If the rom_version is not matched in the qca_devices_table
3353          * and the high ROM version is not zero, we assume this chip no
3354          * need to load the rampatch and nvm.
3355          */
3356         if (ver_rom & ~0xffffU)
3357             return 0;
3358 
3359         bt_dev_err(hdev, "don't support firmware rome 0x%x", ver_rom);
3360         return -ENODEV;
3361     }
3362 
3363     err = btusb_qca_send_vendor_req(udev, QCA_CHECK_STATUS, &status,
3364                     sizeof(status));
3365     if (err < 0)
3366         return err;
3367 
3368     if (!(status & QCA_PATCH_UPDATED)) {
3369         err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
3370         if (err < 0)
3371             return err;
3372     }
3373 
3374     err = btusb_qca_send_vendor_req(udev, QCA_GET_TARGET_VERSION, &ver,
3375                     sizeof(ver));
3376     if (err < 0)
3377         return err;
3378 
3379     if (!(status & QCA_SYSCFG_UPDATED)) {
3380         err = btusb_setup_qca_load_nvm(hdev, &ver, info);
3381         if (err < 0)
3382             return err;
3383 
3384         /* WCN6855 2.1 and later will reset to apply firmware downloaded here, so
3385          * wait ~100ms for reset Done then go ahead, otherwise, it maybe
3386          * cause potential enable failure.
3387          */
3388         if (info->rom_version >= 0x00130201)
3389             msleep(QCA_BT_RESET_WAIT_MS);
3390     }
3391 
3392     /* Mark HCI_OP_ENHANCED_SETUP_SYNC_CONN as broken as it doesn't seem to
3393      * work with the likes of HSP/HFP mSBC.
3394      */
3395     set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
3396 
3397     return 0;
3398 }
3399 
3400 static inline int __set_diag_interface(struct hci_dev *hdev)
3401 {
3402     struct btusb_data *data = hci_get_drvdata(hdev);
3403     struct usb_interface *intf = data->diag;
3404     int i;
3405 
3406     if (!data->diag)
3407         return -ENODEV;
3408 
3409     data->diag_tx_ep = NULL;
3410     data->diag_rx_ep = NULL;
3411 
3412     for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3413         struct usb_endpoint_descriptor *ep_desc;
3414 
3415         ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3416 
3417         if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3418             data->diag_tx_ep = ep_desc;
3419             continue;
3420         }
3421 
3422         if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3423             data->diag_rx_ep = ep_desc;
3424             continue;
3425         }
3426     }
3427 
3428     if (!data->diag_tx_ep || !data->diag_rx_ep) {
3429         bt_dev_err(hdev, "invalid diagnostic descriptors");
3430         return -ENODEV;
3431     }
3432 
3433     return 0;
3434 }
3435 
3436 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
3437 {
3438     struct btusb_data *data = hci_get_drvdata(hdev);
3439     struct sk_buff *skb;
3440     struct urb *urb;
3441     unsigned int pipe;
3442 
3443     if (!data->diag_tx_ep)
3444         return ERR_PTR(-ENODEV);
3445 
3446     urb = usb_alloc_urb(0, GFP_KERNEL);
3447     if (!urb)
3448         return ERR_PTR(-ENOMEM);
3449 
3450     skb = bt_skb_alloc(2, GFP_KERNEL);
3451     if (!skb) {
3452         usb_free_urb(urb);
3453         return ERR_PTR(-ENOMEM);
3454     }
3455 
3456     skb_put_u8(skb, 0xf0);
3457     skb_put_u8(skb, enable);
3458 
3459     pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
3460 
3461     usb_fill_bulk_urb(urb, data->udev, pipe,
3462               skb->data, skb->len, btusb_tx_complete, skb);
3463 
3464     skb->dev = (void *)hdev;
3465 
3466     return urb;
3467 }
3468 
3469 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
3470 {
3471     struct btusb_data *data = hci_get_drvdata(hdev);
3472     struct urb *urb;
3473 
3474     if (!data->diag)
3475         return -ENODEV;
3476 
3477     if (!test_bit(HCI_RUNNING, &hdev->flags))
3478         return -ENETDOWN;
3479 
3480     urb = alloc_diag_urb(hdev, enable);
3481     if (IS_ERR(urb))
3482         return PTR_ERR(urb);
3483 
3484     return submit_or_queue_tx_urb(hdev, urb);
3485 }
3486 
3487 #ifdef CONFIG_PM
3488 static irqreturn_t btusb_oob_wake_handler(int irq, void *priv)
3489 {
3490     struct btusb_data *data = priv;
3491 
3492     pm_wakeup_event(&data->udev->dev, 0);
3493     pm_system_wakeup();
3494 
3495     /* Disable only if not already disabled (keep it balanced) */
3496     if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
3497         disable_irq_nosync(irq);
3498         disable_irq_wake(irq);
3499     }
3500     return IRQ_HANDLED;
3501 }
3502 
3503 static const struct of_device_id btusb_match_table[] = {
3504     { .compatible = "usb1286,204e" },
3505     { .compatible = "usbcf3,e300" }, /* QCA6174A */
3506     { .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
3507     { }
3508 };
3509 MODULE_DEVICE_TABLE(of, btusb_match_table);
3510 
3511 /* Use an oob wakeup pin? */
3512 static int btusb_config_oob_wake(struct hci_dev *hdev)
3513 {
3514     struct btusb_data *data = hci_get_drvdata(hdev);
3515     struct device *dev = &data->udev->dev;
3516     int irq, ret;
3517 
3518     clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
3519 
3520     if (!of_match_device(btusb_match_table, dev))
3521         return 0;
3522 
3523     /* Move on if no IRQ specified */
3524     irq = of_irq_get_byname(dev->of_node, "wakeup");
3525     if (irq <= 0) {
3526         bt_dev_dbg(hdev, "%s: no OOB Wakeup IRQ in DT", __func__);
3527         return 0;
3528     }
3529 
3530     irq_set_status_flags(irq, IRQ_NOAUTOEN);
3531     ret = devm_request_irq(&hdev->dev, irq, btusb_oob_wake_handler,
3532                    0, "OOB Wake-on-BT", data);
3533     if (ret) {
3534         bt_dev_err(hdev, "%s: IRQ request failed", __func__);
3535         return ret;
3536     }
3537 
3538     ret = device_init_wakeup(dev, true);
3539     if (ret) {
3540         bt_dev_err(hdev, "%s: failed to init_wakeup", __func__);
3541         return ret;
3542     }
3543 
3544     data->oob_wake_irq = irq;
3545     bt_dev_info(hdev, "OOB Wake-on-BT configured at IRQ %u", irq);
3546     return 0;
3547 }
3548 #endif
3549 
3550 static void btusb_check_needs_reset_resume(struct usb_interface *intf)
3551 {
3552     if (dmi_check_system(btusb_needs_reset_resume_table))
3553         interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
3554 }
3555 
3556 static bool btusb_wakeup(struct hci_dev *hdev)
3557 {
3558     struct btusb_data *data = hci_get_drvdata(hdev);
3559 
3560     return device_may_wakeup(&data->udev->dev);
3561 }
3562 
3563 static int btusb_shutdown_qca(struct hci_dev *hdev)
3564 {
3565     struct sk_buff *skb;
3566 
3567     skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
3568     if (IS_ERR(skb)) {
3569         bt_dev_err(hdev, "HCI reset during shutdown failed");
3570         return PTR_ERR(skb);
3571     }
3572     kfree_skb(skb);
3573 
3574     return 0;
3575 }
3576 
3577 static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf,
3578                     size_t count, loff_t *ppos)
3579 {
3580     struct btusb_data *data = file->private_data;
3581     char buf[3];
3582 
3583     buf[0] = data->poll_sync ? 'Y' : 'N';
3584     buf[1] = '\n';
3585     buf[2] = '\0';
3586     return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
3587 }
3588 
3589 static ssize_t force_poll_sync_write(struct file *file,
3590                      const char __user *user_buf,
3591                      size_t count, loff_t *ppos)
3592 {
3593     struct btusb_data *data = file->private_data;
3594     bool enable;
3595     int err;
3596 
3597     err = kstrtobool_from_user(user_buf, count, &enable);
3598     if (err)
3599         return err;
3600 
3601     /* Only allow changes while the adapter is down */
3602     if (test_bit(HCI_UP, &data->hdev->flags))
3603         return -EPERM;
3604 
3605     if (data->poll_sync == enable)
3606         return -EALREADY;
3607 
3608     data->poll_sync = enable;
3609 
3610     return count;
3611 }
3612 
3613 static const struct file_operations force_poll_sync_fops = {
3614     .open       = simple_open,
3615     .read       = force_poll_sync_read,
3616     .write      = force_poll_sync_write,
3617     .llseek     = default_llseek,
3618 };
3619 
3620 static int btusb_probe(struct usb_interface *intf,
3621                const struct usb_device_id *id)
3622 {
3623     struct usb_endpoint_descriptor *ep_desc;
3624     struct gpio_desc *reset_gpio;
3625     struct btusb_data *data;
3626     struct hci_dev *hdev;
3627     unsigned ifnum_base;
3628     int i, err, priv_size;
3629 
3630     BT_DBG("intf %p id %p", intf, id);
3631 
3632     /* interface numbers are hardcoded in the spec */
3633     if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
3634         if (!(id->driver_info & BTUSB_IFNUM_2))
3635             return -ENODEV;
3636         if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
3637             return -ENODEV;
3638     }
3639 
3640     ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
3641 
3642     if (!id->driver_info) {
3643         const struct usb_device_id *match;
3644 
3645         match = usb_match_id(intf, blacklist_table);
3646         if (match)
3647             id = match;
3648     }
3649 
3650     if (id->driver_info == BTUSB_IGNORE)
3651         return -ENODEV;
3652 
3653     if (id->driver_info & BTUSB_ATH3012) {
3654         struct usb_device *udev = interface_to_usbdev(intf);
3655 
3656         /* Old firmware would otherwise let ath3k driver load
3657          * patch and sysconfig files
3658          */
3659         if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001 &&
3660             !btusb_qca_need_patch(udev))
3661             return -ENODEV;
3662     }
3663 
3664     data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
3665     if (!data)
3666         return -ENOMEM;
3667 
3668     for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
3669         ep_desc = &intf->cur_altsetting->endpoint[i].desc;
3670 
3671         if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
3672             data->intr_ep = ep_desc;
3673             continue;
3674         }
3675 
3676         if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
3677             data->bulk_tx_ep = ep_desc;
3678             continue;
3679         }
3680 
3681         if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
3682             data->bulk_rx_ep = ep_desc;
3683             continue;
3684         }
3685     }
3686 
3687     if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
3688         return -ENODEV;
3689 
3690     if (id->driver_info & BTUSB_AMP) {
3691         data->cmdreq_type = USB_TYPE_CLASS | 0x01;
3692         data->cmdreq = 0x2b;
3693     } else {
3694         data->cmdreq_type = USB_TYPE_CLASS;
3695         data->cmdreq = 0x00;
3696     }
3697 
3698     data->udev = interface_to_usbdev(intf);
3699     data->intf = intf;
3700 
3701     INIT_WORK(&data->work, btusb_work);
3702     INIT_WORK(&data->waker, btusb_waker);
3703     INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work);
3704 
3705     skb_queue_head_init(&data->acl_q);
3706 
3707     init_usb_anchor(&data->deferred);
3708     init_usb_anchor(&data->tx_anchor);
3709     spin_lock_init(&data->txlock);
3710 
3711     init_usb_anchor(&data->intr_anchor);
3712     init_usb_anchor(&data->bulk_anchor);
3713     init_usb_anchor(&data->isoc_anchor);
3714     init_usb_anchor(&data->diag_anchor);
3715     init_usb_anchor(&data->ctrl_anchor);
3716     spin_lock_init(&data->rxlock);
3717 
3718     priv_size = 0;
3719 
3720     data->recv_event = hci_recv_frame;
3721     data->recv_bulk = btusb_recv_bulk;
3722 
3723     if (id->driver_info & BTUSB_INTEL_COMBINED) {
3724         /* Allocate extra space for Intel device */
3725         priv_size += sizeof(struct btintel_data);
3726 
3727         /* Override the rx handlers */
3728         data->recv_event = btusb_recv_event_intel;
3729         data->recv_bulk = btusb_recv_bulk_intel;
3730     }
3731 
3732     data->recv_acl = hci_recv_frame;
3733 
3734     hdev = hci_alloc_dev_priv(priv_size);
3735     if (!hdev)
3736         return -ENOMEM;
3737 
3738     hdev->bus = HCI_USB;
3739     hci_set_drvdata(hdev, data);
3740 
3741     if (id->driver_info & BTUSB_AMP)
3742         hdev->dev_type = HCI_AMP;
3743     else
3744         hdev->dev_type = HCI_PRIMARY;
3745 
3746     data->hdev = hdev;
3747 
3748     SET_HCIDEV_DEV(hdev, &intf->dev);
3749 
3750     reset_gpio = gpiod_get_optional(&data->udev->dev, "reset",
3751                     GPIOD_OUT_LOW);
3752     if (IS_ERR(reset_gpio)) {
3753         err = PTR_ERR(reset_gpio);
3754         goto out_free_dev;
3755     } else if (reset_gpio) {
3756         data->reset_gpio = reset_gpio;
3757     }
3758 
3759     hdev->open   = btusb_open;
3760     hdev->close  = btusb_close;
3761     hdev->flush  = btusb_flush;
3762     hdev->send   = btusb_send_frame;
3763     hdev->notify = btusb_notify;
3764     hdev->wakeup = btusb_wakeup;
3765 
3766 #ifdef CONFIG_PM
3767     err = btusb_config_oob_wake(hdev);
3768     if (err)
3769         goto out_free_dev;
3770 
3771     /* Marvell devices may need a specific chip configuration */
3772     if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
3773         err = marvell_config_oob_wake(hdev);
3774         if (err)
3775             goto out_free_dev;
3776     }
3777 #endif
3778     if (id->driver_info & BTUSB_CW6622)
3779         set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3780 
3781     if (id->driver_info & BTUSB_BCM2045)
3782         set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
3783 
3784     if (id->driver_info & BTUSB_BCM92035)
3785         hdev->setup = btusb_setup_bcm92035;
3786 
3787     if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3788         (id->driver_info & BTUSB_BCM_PATCHRAM)) {
3789         hdev->manufacturer = 15;
3790         hdev->setup = btbcm_setup_patchram;
3791         hdev->set_diag = btusb_bcm_set_diag;
3792         hdev->set_bdaddr = btbcm_set_bdaddr;
3793 
3794         /* Broadcom LM_DIAG Interface numbers are hardcoded */
3795         data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3796     }
3797 
3798     if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) &&
3799         (id->driver_info & BTUSB_BCM_APPLE)) {
3800         hdev->manufacturer = 15;
3801         hdev->setup = btbcm_setup_apple;
3802         hdev->set_diag = btusb_bcm_set_diag;
3803 
3804         /* Broadcom LM_DIAG Interface numbers are hardcoded */
3805         data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
3806     }
3807 
3808     /* Combined Intel Device setup to support multiple setup routine */
3809     if (id->driver_info & BTUSB_INTEL_COMBINED) {
3810         err = btintel_configure_setup(hdev);
3811         if (err)
3812             goto out_free_dev;
3813 
3814         /* Transport specific configuration */
3815         hdev->send = btusb_send_frame_intel;
3816         hdev->cmd_timeout = btusb_intel_cmd_timeout;
3817 
3818         if (id->driver_info & BTUSB_INTEL_NO_WBS_SUPPORT)
3819             btintel_set_flag(hdev, INTEL_ROM_LEGACY_NO_WBS_SUPPORT);
3820 
3821         if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
3822             btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);
3823 
3824         if (id->driver_info & BTUSB_INTEL_BROKEN_SHUTDOWN_LED)
3825             btintel_set_flag(hdev, INTEL_BROKEN_SHUTDOWN_LED);
3826     }
3827 
3828     if (id->driver_info & BTUSB_MARVELL)
3829         hdev->set_bdaddr = btusb_set_bdaddr_marvell;
3830 
3831     if (IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) &&
3832         (id->driver_info & BTUSB_MEDIATEK)) {
3833         hdev->setup = btusb_mtk_setup;
3834         hdev->shutdown = btusb_mtk_shutdown;
3835         hdev->manufacturer = 70;
3836         hdev->cmd_timeout = btusb_mtk_cmd_timeout;
3837         hdev->set_bdaddr = btmtk_set_bdaddr;
3838         set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
3839         set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
3840         data->recv_acl = btusb_recv_acl_mtk;
3841     }
3842 
3843     if (id->driver_info & BTUSB_SWAVE) {
3844         set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
3845         set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
3846     }
3847 
3848     if (id->driver_info & BTUSB_INTEL_BOOT) {
3849         hdev->manufacturer = 2;
3850         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3851     }
3852 
3853     if (id->driver_info & BTUSB_ATH3012) {
3854         data->setup_on_usb = btusb_setup_qca;
3855         hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3856         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3857         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
3858     }
3859 
3860     if (id->driver_info & BTUSB_QCA_ROME) {
3861         data->setup_on_usb = btusb_setup_qca;
3862         hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
3863         hdev->cmd_timeout = btusb_qca_cmd_timeout;
3864         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3865         btusb_check_needs_reset_resume(intf);
3866     }
3867 
3868     if (id->driver_info & BTUSB_QCA_WCN6855) {
3869         data->setup_on_usb = btusb_setup_qca;
3870         hdev->shutdown = btusb_shutdown_qca;
3871         hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
3872         hdev->cmd_timeout = btusb_qca_cmd_timeout;
3873         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3874         hci_set_msft_opcode(hdev, 0xFD70);
3875     }
3876 
3877     if (id->driver_info & BTUSB_AMP) {
3878         /* AMP controllers do not support SCO packets */
3879         data->isoc = NULL;
3880     } else {
3881         /* Interface orders are hardcoded in the specification */
3882         data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
3883         data->isoc_ifnum = ifnum_base + 1;
3884     }
3885 
3886     if (IS_ENABLED(CONFIG_BT_HCIBTUSB_RTL) &&
3887         (id->driver_info & BTUSB_REALTEK)) {
3888         hdev->setup = btrtl_setup_realtek;
3889         hdev->shutdown = btrtl_shutdown_realtek;
3890         hdev->cmd_timeout = btusb_rtl_cmd_timeout;
3891 
3892         /* Realtek devices need to set remote wakeup on auto-suspend */
3893         set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
3894         set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
3895     }
3896 
3897     if (!reset)
3898         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3899 
3900     if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
3901         if (!disable_scofix)
3902             set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
3903     }
3904 
3905     if (id->driver_info & BTUSB_BROKEN_ISOC)
3906         data->isoc = NULL;
3907 
3908     if (id->driver_info & BTUSB_WIDEBAND_SPEECH)
3909         set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
3910 
3911     if (id->driver_info & BTUSB_VALID_LE_STATES)
3912         set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
3913 
3914     if (id->driver_info & BTUSB_DIGIANSWER) {
3915         data->cmdreq_type = USB_TYPE_VENDOR;
3916         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3917     }
3918 
3919     if (id->driver_info & BTUSB_CSR) {
3920         struct usb_device *udev = data->udev;
3921         u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
3922 
3923         /* Old firmware would otherwise execute USB reset */
3924         if (bcdDevice < 0x117)
3925             set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
3926 
3927         /* This must be set first in case we disable it for fakes */
3928         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
3929 
3930         /* Fake CSR devices with broken commands */
3931         if (le16_to_cpu(udev->descriptor.idVendor)  == 0x0a12 &&
3932             le16_to_cpu(udev->descriptor.idProduct) == 0x0001)
3933             hdev->setup = btusb_setup_csr;
3934     }
3935 
3936     if (id->driver_info & BTUSB_SNIFFER) {
3937         struct usb_device *udev = data->udev;
3938 
3939         /* New sniffer firmware has crippled HCI interface */
3940         if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
3941             set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
3942     }
3943 
3944     if (id->driver_info & BTUSB_INTEL_BOOT) {
3945         /* A bug in the bootloader causes that interrupt interface is
3946          * only enabled after receiving SetInterface(0, AltSetting=0).
3947          */
3948         err = usb_set_interface(data->udev, 0, 0);
3949         if (err < 0) {
3950             BT_ERR("failed to set interface 0, alt 0 %d", err);
3951             goto out_free_dev;
3952         }
3953     }
3954 
3955     if (data->isoc) {
3956         err = usb_driver_claim_interface(&btusb_driver,
3957                          data->isoc, data);
3958         if (err < 0)
3959             goto out_free_dev;
3960     }
3961 
3962     if (IS_ENABLED(CONFIG_BT_HCIBTUSB_BCM) && data->diag) {
3963         if (!usb_driver_claim_interface(&btusb_driver,
3964                         data->diag, data))
3965             __set_diag_interface(hdev);
3966         else
3967             data->diag = NULL;
3968     }
3969 
3970     if (enable_autosuspend)
3971         usb_enable_autosuspend(data->udev);
3972 
3973     err = hci_register_dev(hdev);
3974     if (err < 0)
3975         goto out_free_dev;
3976 
3977     usb_set_intfdata(intf, data);
3978 
3979     debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data,
3980                 &force_poll_sync_fops);
3981 
3982     return 0;
3983 
3984 out_free_dev:
3985     if (data->reset_gpio)
3986         gpiod_put(data->reset_gpio);
3987     hci_free_dev(hdev);
3988     return err;
3989 }
3990 
3991 static void btusb_disconnect(struct usb_interface *intf)
3992 {
3993     struct btusb_data *data = usb_get_intfdata(intf);
3994     struct hci_dev *hdev;
3995 
3996     BT_DBG("intf %p", intf);
3997 
3998     if (!data)
3999         return;
4000 
4001     hdev = data->hdev;
4002     usb_set_intfdata(data->intf, NULL);
4003 
4004     if (data->isoc)
4005         usb_set_intfdata(data->isoc, NULL);
4006 
4007     if (data->diag)
4008         usb_set_intfdata(data->diag, NULL);
4009 
4010     hci_unregister_dev(hdev);
4011 
4012     if (intf == data->intf) {
4013         if (data->isoc)
4014             usb_driver_release_interface(&btusb_driver, data->isoc);
4015         if (data->diag)
4016             usb_driver_release_interface(&btusb_driver, data->diag);
4017     } else if (intf == data->isoc) {
4018         if (data->diag)
4019             usb_driver_release_interface(&btusb_driver, data->diag);
4020         usb_driver_release_interface(&btusb_driver, data->intf);
4021     } else if (intf == data->diag) {
4022         usb_driver_release_interface(&btusb_driver, data->intf);
4023         if (data->isoc)
4024             usb_driver_release_interface(&btusb_driver, data->isoc);
4025     }
4026 
4027     if (data->oob_wake_irq)
4028         device_init_wakeup(&data->udev->dev, false);
4029 
4030     if (data->reset_gpio)
4031         gpiod_put(data->reset_gpio);
4032 
4033     hci_free_dev(hdev);
4034 }
4035 
4036 #ifdef CONFIG_PM
4037 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
4038 {
4039     struct btusb_data *data = usb_get_intfdata(intf);
4040 
4041     BT_DBG("intf %p", intf);
4042 
4043     if (data->suspend_count++)
4044         return 0;
4045 
4046     spin_lock_irq(&data->txlock);
4047     if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
4048         set_bit(BTUSB_SUSPENDING, &data->flags);
4049         spin_unlock_irq(&data->txlock);
4050     } else {
4051         spin_unlock_irq(&data->txlock);
4052         data->suspend_count--;
4053         return -EBUSY;
4054     }
4055 
4056     cancel_work_sync(&data->work);
4057 
4058     btusb_stop_traffic(data);
4059     usb_kill_anchored_urbs(&data->tx_anchor);
4060 
4061     if (data->oob_wake_irq && device_may_wakeup(&data->udev->dev)) {
4062         set_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags);
4063         enable_irq_wake(data->oob_wake_irq);
4064         enable_irq(data->oob_wake_irq);
4065     }
4066 
4067     /* For global suspend, Realtek devices lose the loaded fw
4068      * in them. But for autosuspend, firmware should remain.
4069      * Actually, it depends on whether the usb host sends
4070      * set feature (enable wakeup) or not.
4071      */
4072     if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
4073         if (PMSG_IS_AUTO(message) &&
4074             device_can_wakeup(&data->udev->dev))
4075             data->udev->do_remote_wakeup = 1;
4076         else if (!PMSG_IS_AUTO(message) &&
4077              !device_may_wakeup(&data->udev->dev)) {
4078             data->udev->do_remote_wakeup = 0;
4079             data->udev->reset_resume = 1;
4080         }
4081     }
4082 
4083     return 0;
4084 }
4085 
4086 static void play_deferred(struct btusb_data *data)
4087 {
4088     struct urb *urb;
4089     int err;
4090 
4091     while ((urb = usb_get_from_anchor(&data->deferred))) {
4092         usb_anchor_urb(urb, &data->tx_anchor);
4093 
4094         err = usb_submit_urb(urb, GFP_ATOMIC);
4095         if (err < 0) {
4096             if (err != -EPERM && err != -ENODEV)
4097                 BT_ERR("%s urb %p submission failed (%d)",
4098                        data->hdev->name, urb, -err);
4099             kfree(urb->setup_packet);
4100             usb_unanchor_urb(urb);
4101             usb_free_urb(urb);
4102             break;
4103         }
4104 
4105         data->tx_in_flight++;
4106         usb_free_urb(urb);
4107     }
4108 
4109     /* Cleanup the rest deferred urbs. */
4110     while ((urb = usb_get_from_anchor(&data->deferred))) {
4111         kfree(urb->setup_packet);
4112         usb_free_urb(urb);
4113     }
4114 }
4115 
4116 static int btusb_resume(struct usb_interface *intf)
4117 {
4118     struct btusb_data *data = usb_get_intfdata(intf);
4119     struct hci_dev *hdev = data->hdev;
4120     int err = 0;
4121 
4122     BT_DBG("intf %p", intf);
4123 
4124     if (--data->suspend_count)
4125         return 0;
4126 
4127     /* Disable only if not already disabled (keep it balanced) */
4128     if (test_and_clear_bit(BTUSB_OOB_WAKE_ENABLED, &data->flags)) {
4129         disable_irq(data->oob_wake_irq);
4130         disable_irq_wake(data->oob_wake_irq);
4131     }
4132 
4133     if (!test_bit(HCI_RUNNING, &hdev->flags))
4134         goto done;
4135 
4136     if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
4137         err = btusb_submit_intr_urb(hdev, GFP_NOIO);
4138         if (err < 0) {
4139             clear_bit(BTUSB_INTR_RUNNING, &data->flags);
4140             goto failed;
4141         }
4142     }
4143 
4144     if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
4145         err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
4146         if (err < 0) {
4147             clear_bit(BTUSB_BULK_RUNNING, &data->flags);
4148             goto failed;
4149         }
4150 
4151         btusb_submit_bulk_urb(hdev, GFP_NOIO);
4152     }
4153 
4154     if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
4155         if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
4156             clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
4157         else
4158             btusb_submit_isoc_urb(hdev, GFP_NOIO);
4159     }
4160 
4161     spin_lock_irq(&data->txlock);
4162     play_deferred(data);
4163     clear_bit(BTUSB_SUSPENDING, &data->flags);
4164     spin_unlock_irq(&data->txlock);
4165     schedule_work(&data->work);
4166 
4167     return 0;
4168 
4169 failed:
4170     usb_scuttle_anchored_urbs(&data->deferred);
4171 done:
4172     spin_lock_irq(&data->txlock);
4173     clear_bit(BTUSB_SUSPENDING, &data->flags);
4174     spin_unlock_irq(&data->txlock);
4175 
4176     return err;
4177 }
4178 #endif
4179 
4180 static struct usb_driver btusb_driver = {
4181     .name       = "btusb",
4182     .probe      = btusb_probe,
4183     .disconnect = btusb_disconnect,
4184 #ifdef CONFIG_PM
4185     .suspend    = btusb_suspend,
4186     .resume     = btusb_resume,
4187 #endif
4188     .id_table   = btusb_table,
4189     .supports_autosuspend = 1,
4190     .disable_hub_initiated_lpm = 1,
4191 };
4192 
4193 module_usb_driver(btusb_driver);
4194 
4195 module_param(disable_scofix, bool, 0644);
4196 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
4197 
4198 module_param(force_scofix, bool, 0644);
4199 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
4200 
4201 module_param(enable_autosuspend, bool, 0644);
4202 MODULE_PARM_DESC(enable_autosuspend, "Enable USB autosuspend by default");
4203 
4204 module_param(reset, bool, 0644);
4205 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
4206 
4207 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4208 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
4209 MODULE_VERSION(VERSION);
4210 MODULE_LICENSE("GPL");
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