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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver
0004  *
0005  * Copyright (C) 2008      Henrik Rydberg (rydberg@euromail.se)
0006  * Copyright (C) 2015      John Horan (knasher@gmail.com)
0007  *
0008  * The USB initialization and package decoding was made by
0009  * Scott Shawcroft as part of the touchd user-space driver project:
0010  * Copyright (C) 2008      Scott Shawcroft (scott.shawcroft@gmail.com)
0011  *
0012  * The BCM5974 driver is based on the appletouch driver:
0013  * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
0014  * Copyright (C) 2005      Johannes Berg (johannes@sipsolutions.net)
0015  * Copyright (C) 2005      Stelian Pop (stelian@popies.net)
0016  * Copyright (C) 2005      Frank Arnold (frank@scirocco-5v-turbo.de)
0017  * Copyright (C) 2005      Peter Osterlund (petero2@telia.com)
0018  * Copyright (C) 2005      Michael Hanselmann (linux-kernel@hansmi.ch)
0019  * Copyright (C) 2006      Nicolas Boichat (nicolas@boichat.ch)
0020  */
0021 
0022 #include <linux/kernel.h>
0023 #include <linux/errno.h>
0024 #include <linux/slab.h>
0025 #include <linux/module.h>
0026 #include <linux/usb/input.h>
0027 #include <linux/hid.h>
0028 #include <linux/mutex.h>
0029 #include <linux/input/mt.h>
0030 
0031 #define USB_VENDOR_ID_APPLE     0x05ac
0032 
0033 /* MacbookAir, aka wellspring */
0034 #define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI 0x0223
0035 #define USB_DEVICE_ID_APPLE_WELLSPRING_ISO  0x0224
0036 #define USB_DEVICE_ID_APPLE_WELLSPRING_JIS  0x0225
0037 /* MacbookProPenryn, aka wellspring2 */
0038 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI    0x0230
0039 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO 0x0231
0040 #define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS 0x0232
0041 /* Macbook5,1 (unibody), aka wellspring3 */
0042 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI    0x0236
0043 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO 0x0237
0044 #define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS 0x0238
0045 /* MacbookAir3,2 (unibody), aka wellspring5 */
0046 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI    0x023f
0047 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO 0x0240
0048 #define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS 0x0241
0049 /* MacbookAir3,1 (unibody), aka wellspring4 */
0050 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI   0x0242
0051 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO    0x0243
0052 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS    0x0244
0053 /* Macbook8 (unibody, March 2011) */
0054 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI    0x0245
0055 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO 0x0246
0056 #define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS 0x0247
0057 /* MacbookAir4,1 (unibody, July 2011) */
0058 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI   0x0249
0059 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO    0x024a
0060 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS    0x024b
0061 /* MacbookAir4,2 (unibody, July 2011) */
0062 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI    0x024c
0063 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ISO 0x024d
0064 #define USB_DEVICE_ID_APPLE_WELLSPRING6_JIS 0x024e
0065 /* Macbook8,2 (unibody) */
0066 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI   0x0252
0067 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO    0x0253
0068 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS    0x0254
0069 /* MacbookPro10,1 (unibody, June 2012) */
0070 #define USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI    0x0262
0071 #define USB_DEVICE_ID_APPLE_WELLSPRING7_ISO 0x0263
0072 #define USB_DEVICE_ID_APPLE_WELLSPRING7_JIS 0x0264
0073 /* MacbookPro10,2 (unibody, October 2012) */
0074 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI   0x0259
0075 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO    0x025a
0076 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS    0x025b
0077 /* MacbookAir6,2 (unibody, June 2013) */
0078 #define USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI    0x0290
0079 #define USB_DEVICE_ID_APPLE_WELLSPRING8_ISO 0x0291
0080 #define USB_DEVICE_ID_APPLE_WELLSPRING8_JIS 0x0292
0081 /* MacbookPro12,1 (2015) */
0082 #define USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI    0x0272
0083 #define USB_DEVICE_ID_APPLE_WELLSPRING9_ISO 0x0273
0084 #define USB_DEVICE_ID_APPLE_WELLSPRING9_JIS 0x0274
0085 
0086 #define BCM5974_DEVICE(prod) {                  \
0087     .match_flags = (USB_DEVICE_ID_MATCH_DEVICE |        \
0088             USB_DEVICE_ID_MATCH_INT_CLASS |     \
0089             USB_DEVICE_ID_MATCH_INT_PROTOCOL),  \
0090     .idVendor = USB_VENDOR_ID_APPLE,            \
0091     .idProduct = (prod),                    \
0092     .bInterfaceClass = USB_INTERFACE_CLASS_HID,     \
0093     .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE  \
0094 }
0095 
0096 /* table of devices that work with this driver */
0097 static const struct usb_device_id bcm5974_table[] = {
0098     /* MacbookAir1.1 */
0099     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI),
0100     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO),
0101     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS),
0102     /* MacbookProPenryn */
0103     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI),
0104     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO),
0105     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS),
0106     /* Macbook5,1 */
0107     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI),
0108     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO),
0109     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS),
0110     /* MacbookAir3,2 */
0111     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI),
0112     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO),
0113     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS),
0114     /* MacbookAir3,1 */
0115     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI),
0116     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO),
0117     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS),
0118     /* MacbookPro8 */
0119     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI),
0120     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO),
0121     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS),
0122     /* MacbookAir4,1 */
0123     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI),
0124     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO),
0125     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS),
0126     /* MacbookAir4,2 */
0127     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI),
0128     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ISO),
0129     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_JIS),
0130     /* MacbookPro8,2 */
0131     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI),
0132     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO),
0133     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS),
0134     /* MacbookPro10,1 */
0135     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI),
0136     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ISO),
0137     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_JIS),
0138     /* MacbookPro10,2 */
0139     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI),
0140     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO),
0141     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS),
0142     /* MacbookAir6,2 */
0143     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI),
0144     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ISO),
0145     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_JIS),
0146     /* MacbookPro12,1 */
0147     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI),
0148     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ISO),
0149     BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_JIS),
0150     /* Terminating entry */
0151     {}
0152 };
0153 MODULE_DEVICE_TABLE(usb, bcm5974_table);
0154 
0155 MODULE_AUTHOR("Henrik Rydberg");
0156 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
0157 MODULE_LICENSE("GPL");
0158 
0159 #define dprintk(level, format, a...)\
0160     { if (debug >= level) printk(KERN_DEBUG format, ##a); }
0161 
0162 static int debug = 1;
0163 module_param(debug, int, 0644);
0164 MODULE_PARM_DESC(debug, "Activate debugging output");
0165 
0166 /* button data structure */
0167 struct bt_data {
0168     u8 unknown1;        /* constant */
0169     u8 button;      /* left button */
0170     u8 rel_x;       /* relative x coordinate */
0171     u8 rel_y;       /* relative y coordinate */
0172 };
0173 
0174 /* trackpad header types */
0175 enum tp_type {
0176     TYPE1,          /* plain trackpad */
0177     TYPE2,          /* button integrated in trackpad */
0178     TYPE3,          /* additional header fields since June 2013 */
0179     TYPE4           /* additional header field for pressure data */
0180 };
0181 
0182 /* trackpad finger data offsets, le16-aligned */
0183 #define HEADER_TYPE1        (13 * sizeof(__le16))
0184 #define HEADER_TYPE2        (15 * sizeof(__le16))
0185 #define HEADER_TYPE3        (19 * sizeof(__le16))
0186 #define HEADER_TYPE4        (23 * sizeof(__le16))
0187 
0188 /* trackpad button data offsets */
0189 #define BUTTON_TYPE1        0
0190 #define BUTTON_TYPE2        15
0191 #define BUTTON_TYPE3        23
0192 #define BUTTON_TYPE4        31
0193 
0194 /* list of device capability bits */
0195 #define HAS_INTEGRATED_BUTTON   1
0196 
0197 /* trackpad finger data block size */
0198 #define FSIZE_TYPE1     (14 * sizeof(__le16))
0199 #define FSIZE_TYPE2     (14 * sizeof(__le16))
0200 #define FSIZE_TYPE3     (14 * sizeof(__le16))
0201 #define FSIZE_TYPE4     (15 * sizeof(__le16))
0202 
0203 /* offset from header to finger struct */
0204 #define DELTA_TYPE1     (0 * sizeof(__le16))
0205 #define DELTA_TYPE2     (0 * sizeof(__le16))
0206 #define DELTA_TYPE3     (0 * sizeof(__le16))
0207 #define DELTA_TYPE4     (1 * sizeof(__le16))
0208 
0209 /* usb control message mode switch data */
0210 #define USBMSG_TYPE1        8, 0x300, 0, 0, 0x1, 0x8
0211 #define USBMSG_TYPE2        8, 0x300, 0, 0, 0x1, 0x8
0212 #define USBMSG_TYPE3        8, 0x300, 0, 0, 0x1, 0x8
0213 #define USBMSG_TYPE4        2, 0x302, 2, 1, 0x1, 0x0
0214 
0215 /* Wellspring initialization constants */
0216 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID     1
0217 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID    9
0218 
0219 /* trackpad finger structure, le16-aligned */
0220 struct tp_finger {
0221     __le16 origin;      /* zero when switching track finger */
0222     __le16 abs_x;       /* absolute x coodinate */
0223     __le16 abs_y;       /* absolute y coodinate */
0224     __le16 rel_x;       /* relative x coodinate */
0225     __le16 rel_y;       /* relative y coodinate */
0226     __le16 tool_major;  /* tool area, major axis */
0227     __le16 tool_minor;  /* tool area, minor axis */
0228     __le16 orientation; /* 16384 when point, else 15 bit angle */
0229     __le16 touch_major; /* touch area, major axis */
0230     __le16 touch_minor; /* touch area, minor axis */
0231     __le16 unused[2];   /* zeros */
0232     __le16 pressure;    /* pressure on forcetouch touchpad */
0233     __le16 multi;       /* one finger: varies, more fingers: constant */
0234 } __attribute__((packed,aligned(2)));
0235 
0236 /* trackpad finger data size, empirically at least ten fingers */
0237 #define MAX_FINGERS     16
0238 #define MAX_FINGER_ORIENTATION  16384
0239 
0240 /* device-specific parameters */
0241 struct bcm5974_param {
0242     int snratio;        /* signal-to-noise ratio */
0243     int min;        /* device minimum reading */
0244     int max;        /* device maximum reading */
0245 };
0246 
0247 /* device-specific configuration */
0248 struct bcm5974_config {
0249     int ansi, iso, jis; /* the product id of this device */
0250     int caps;       /* device capability bitmask */
0251     int bt_ep;      /* the endpoint of the button interface */
0252     int bt_datalen;     /* data length of the button interface */
0253     int tp_ep;      /* the endpoint of the trackpad interface */
0254     enum tp_type tp_type;   /* type of trackpad interface */
0255     int tp_header;      /* bytes in header block */
0256     int tp_datalen;     /* data length of the trackpad interface */
0257     int tp_button;      /* offset to button data */
0258     int tp_fsize;       /* bytes in single finger block */
0259     int tp_delta;       /* offset from header to finger struct */
0260     int um_size;        /* usb control message length */
0261     int um_req_val;     /* usb control message value */
0262     int um_req_idx;     /* usb control message index */
0263     int um_switch_idx;  /* usb control message mode switch index */
0264     int um_switch_on;   /* usb control message mode switch on */
0265     int um_switch_off;  /* usb control message mode switch off */
0266     struct bcm5974_param p; /* finger pressure limits */
0267     struct bcm5974_param w; /* finger width limits */
0268     struct bcm5974_param x; /* horizontal limits */
0269     struct bcm5974_param y; /* vertical limits */
0270     struct bcm5974_param o; /* orientation limits */
0271 };
0272 
0273 /* logical device structure */
0274 struct bcm5974 {
0275     char phys[64];
0276     struct usb_device *udev;    /* usb device */
0277     struct usb_interface *intf; /* our interface */
0278     struct input_dev *input;    /* input dev */
0279     struct bcm5974_config cfg;  /* device configuration */
0280     struct mutex pm_mutex;      /* serialize access to open/suspend */
0281     int opened;         /* 1: opened, 0: closed */
0282     struct urb *bt_urb;     /* button usb request block */
0283     struct bt_data *bt_data;    /* button transferred data */
0284     struct urb *tp_urb;     /* trackpad usb request block */
0285     u8 *tp_data;            /* trackpad transferred data */
0286     const struct tp_finger *index[MAX_FINGERS]; /* finger index data */
0287     struct input_mt_pos pos[MAX_FINGERS];       /* position array */
0288     int slots[MAX_FINGERS];             /* slot assignments */
0289 };
0290 
0291 /* trackpad finger block data, le16-aligned */
0292 static const struct tp_finger *get_tp_finger(const struct bcm5974 *dev, int i)
0293 {
0294     const struct bcm5974_config *c = &dev->cfg;
0295     u8 *f_base = dev->tp_data + c->tp_header + c->tp_delta;
0296 
0297     return (const struct tp_finger *)(f_base + i * c->tp_fsize);
0298 }
0299 
0300 #define DATAFORMAT(type)                \
0301     type,                       \
0302     HEADER_##type,                  \
0303     HEADER_##type + (MAX_FINGERS) * (FSIZE_##type), \
0304     BUTTON_##type,                  \
0305     FSIZE_##type,                   \
0306     DELTA_##type,                   \
0307     USBMSG_##type
0308 
0309 /* logical signal quality */
0310 #define SN_PRESSURE 45      /* pressure signal-to-noise ratio */
0311 #define SN_WIDTH    25      /* width signal-to-noise ratio */
0312 #define SN_COORD    250     /* coordinate signal-to-noise ratio */
0313 #define SN_ORIENT   10      /* orientation signal-to-noise ratio */
0314 
0315 /* device constants */
0316 static const struct bcm5974_config bcm5974_config_table[] = {
0317     {
0318         USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
0319         USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
0320         USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
0321         0,
0322         0x84, sizeof(struct bt_data),
0323         0x81, DATAFORMAT(TYPE1),
0324         { SN_PRESSURE, 0, 256 },
0325         { SN_WIDTH, 0, 2048 },
0326         { SN_COORD, -4824, 5342 },
0327         { SN_COORD, -172, 5820 },
0328         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0329     },
0330     {
0331         USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
0332         USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
0333         USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
0334         0,
0335         0x84, sizeof(struct bt_data),
0336         0x81, DATAFORMAT(TYPE1),
0337         { SN_PRESSURE, 0, 256 },
0338         { SN_WIDTH, 0, 2048 },
0339         { SN_COORD, -4824, 4824 },
0340         { SN_COORD, -172, 4290 },
0341         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0342     },
0343     {
0344         USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI,
0345         USB_DEVICE_ID_APPLE_WELLSPRING3_ISO,
0346         USB_DEVICE_ID_APPLE_WELLSPRING3_JIS,
0347         HAS_INTEGRATED_BUTTON,
0348         0x84, sizeof(struct bt_data),
0349         0x81, DATAFORMAT(TYPE2),
0350         { SN_PRESSURE, 0, 300 },
0351         { SN_WIDTH, 0, 2048 },
0352         { SN_COORD, -4460, 5166 },
0353         { SN_COORD, -75, 6700 },
0354         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0355     },
0356     {
0357         USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI,
0358         USB_DEVICE_ID_APPLE_WELLSPRING4_ISO,
0359         USB_DEVICE_ID_APPLE_WELLSPRING4_JIS,
0360         HAS_INTEGRATED_BUTTON,
0361         0x84, sizeof(struct bt_data),
0362         0x81, DATAFORMAT(TYPE2),
0363         { SN_PRESSURE, 0, 300 },
0364         { SN_WIDTH, 0, 2048 },
0365         { SN_COORD, -4620, 5140 },
0366         { SN_COORD, -150, 6600 },
0367         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0368     },
0369     {
0370         USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI,
0371         USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO,
0372         USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS,
0373         HAS_INTEGRATED_BUTTON,
0374         0x84, sizeof(struct bt_data),
0375         0x81, DATAFORMAT(TYPE2),
0376         { SN_PRESSURE, 0, 300 },
0377         { SN_WIDTH, 0, 2048 },
0378         { SN_COORD, -4616, 5112 },
0379         { SN_COORD, -142, 5234 },
0380         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0381     },
0382     {
0383         USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI,
0384         USB_DEVICE_ID_APPLE_WELLSPRING5_ISO,
0385         USB_DEVICE_ID_APPLE_WELLSPRING5_JIS,
0386         HAS_INTEGRATED_BUTTON,
0387         0x84, sizeof(struct bt_data),
0388         0x81, DATAFORMAT(TYPE2),
0389         { SN_PRESSURE, 0, 300 },
0390         { SN_WIDTH, 0, 2048 },
0391         { SN_COORD, -4415, 5050 },
0392         { SN_COORD, -55, 6680 },
0393         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0394     },
0395     {
0396         USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI,
0397         USB_DEVICE_ID_APPLE_WELLSPRING6_ISO,
0398         USB_DEVICE_ID_APPLE_WELLSPRING6_JIS,
0399         HAS_INTEGRATED_BUTTON,
0400         0x84, sizeof(struct bt_data),
0401         0x81, DATAFORMAT(TYPE2),
0402         { SN_PRESSURE, 0, 300 },
0403         { SN_WIDTH, 0, 2048 },
0404         { SN_COORD, -4620, 5140 },
0405         { SN_COORD, -150, 6600 },
0406         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0407     },
0408     {
0409         USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI,
0410         USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO,
0411         USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS,
0412         HAS_INTEGRATED_BUTTON,
0413         0x84, sizeof(struct bt_data),
0414         0x81, DATAFORMAT(TYPE2),
0415         { SN_PRESSURE, 0, 300 },
0416         { SN_WIDTH, 0, 2048 },
0417         { SN_COORD, -4750, 5280 },
0418         { SN_COORD, -150, 6730 },
0419         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0420     },
0421     {
0422         USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI,
0423         USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO,
0424         USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS,
0425         HAS_INTEGRATED_BUTTON,
0426         0x84, sizeof(struct bt_data),
0427         0x81, DATAFORMAT(TYPE2),
0428         { SN_PRESSURE, 0, 300 },
0429         { SN_WIDTH, 0, 2048 },
0430         { SN_COORD, -4620, 5140 },
0431         { SN_COORD, -150, 6600 },
0432         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0433     },
0434     {
0435         USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI,
0436         USB_DEVICE_ID_APPLE_WELLSPRING7_ISO,
0437         USB_DEVICE_ID_APPLE_WELLSPRING7_JIS,
0438         HAS_INTEGRATED_BUTTON,
0439         0x84, sizeof(struct bt_data),
0440         0x81, DATAFORMAT(TYPE2),
0441         { SN_PRESSURE, 0, 300 },
0442         { SN_WIDTH, 0, 2048 },
0443         { SN_COORD, -4750, 5280 },
0444         { SN_COORD, -150, 6730 },
0445         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0446     },
0447     {
0448         USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI,
0449         USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO,
0450         USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS,
0451         HAS_INTEGRATED_BUTTON,
0452         0x84, sizeof(struct bt_data),
0453         0x81, DATAFORMAT(TYPE2),
0454         { SN_PRESSURE, 0, 300 },
0455         { SN_WIDTH, 0, 2048 },
0456         { SN_COORD, -4750, 5280 },
0457         { SN_COORD, -150, 6730 },
0458         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0459     },
0460     {
0461         USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI,
0462         USB_DEVICE_ID_APPLE_WELLSPRING8_ISO,
0463         USB_DEVICE_ID_APPLE_WELLSPRING8_JIS,
0464         HAS_INTEGRATED_BUTTON,
0465         0, sizeof(struct bt_data),
0466         0x83, DATAFORMAT(TYPE3),
0467         { SN_PRESSURE, 0, 300 },
0468         { SN_WIDTH, 0, 2048 },
0469         { SN_COORD, -4620, 5140 },
0470         { SN_COORD, -150, 6600 },
0471         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0472     },
0473     {
0474         USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI,
0475         USB_DEVICE_ID_APPLE_WELLSPRING9_ISO,
0476         USB_DEVICE_ID_APPLE_WELLSPRING9_JIS,
0477         HAS_INTEGRATED_BUTTON,
0478         0, sizeof(struct bt_data),
0479         0x83, DATAFORMAT(TYPE4),
0480         { SN_PRESSURE, 0, 300 },
0481         { SN_WIDTH, 0, 2048 },
0482         { SN_COORD, -4828, 5345 },
0483         { SN_COORD, -203, 6803 },
0484         { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
0485     },
0486     {}
0487 };
0488 
0489 /* return the device-specific configuration by device */
0490 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
0491 {
0492     u16 id = le16_to_cpu(udev->descriptor.idProduct);
0493     const struct bcm5974_config *cfg;
0494 
0495     for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
0496         if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
0497             return cfg;
0498 
0499     return bcm5974_config_table;
0500 }
0501 
0502 /* convert 16-bit little endian to signed integer */
0503 static inline int raw2int(__le16 x)
0504 {
0505     return (signed short)le16_to_cpu(x);
0506 }
0507 
0508 static void set_abs(struct input_dev *input, unsigned int code,
0509             const struct bcm5974_param *p)
0510 {
0511     int fuzz = p->snratio ? (p->max - p->min) / p->snratio : 0;
0512     input_set_abs_params(input, code, p->min, p->max, fuzz, 0);
0513 }
0514 
0515 /* setup which logical events to report */
0516 static void setup_events_to_report(struct input_dev *input_dev,
0517                    const struct bcm5974_config *cfg)
0518 {
0519     __set_bit(EV_ABS, input_dev->evbit);
0520 
0521     /* for synaptics only */
0522     input_set_abs_params(input_dev, ABS_PRESSURE, 0, 256, 5, 0);
0523     input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 16, 0, 0);
0524 
0525     /* finger touch area */
0526     set_abs(input_dev, ABS_MT_TOUCH_MAJOR, &cfg->w);
0527     set_abs(input_dev, ABS_MT_TOUCH_MINOR, &cfg->w);
0528     /* finger approach area */
0529     set_abs(input_dev, ABS_MT_WIDTH_MAJOR, &cfg->w);
0530     set_abs(input_dev, ABS_MT_WIDTH_MINOR, &cfg->w);
0531     /* finger orientation */
0532     set_abs(input_dev, ABS_MT_ORIENTATION, &cfg->o);
0533     /* finger position */
0534     set_abs(input_dev, ABS_MT_POSITION_X, &cfg->x);
0535     set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y);
0536 
0537     __set_bit(EV_KEY, input_dev->evbit);
0538     __set_bit(BTN_LEFT, input_dev->keybit);
0539 
0540     if (cfg->caps & HAS_INTEGRATED_BUTTON)
0541         __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
0542 
0543     input_mt_init_slots(input_dev, MAX_FINGERS,
0544         INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
0545 }
0546 
0547 /* report button data as logical button state */
0548 static int report_bt_state(struct bcm5974 *dev, int size)
0549 {
0550     if (size != sizeof(struct bt_data))
0551         return -EIO;
0552 
0553     dprintk(7,
0554         "bcm5974: button data: %x %x %x %x\n",
0555         dev->bt_data->unknown1, dev->bt_data->button,
0556         dev->bt_data->rel_x, dev->bt_data->rel_y);
0557 
0558     input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
0559     input_sync(dev->input);
0560 
0561     return 0;
0562 }
0563 
0564 static void report_finger_data(struct input_dev *input, int slot,
0565                    const struct input_mt_pos *pos,
0566                    const struct tp_finger *f)
0567 {
0568     input_mt_slot(input, slot);
0569     input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
0570 
0571     input_report_abs(input, ABS_MT_TOUCH_MAJOR,
0572              raw2int(f->touch_major) << 1);
0573     input_report_abs(input, ABS_MT_TOUCH_MINOR,
0574              raw2int(f->touch_minor) << 1);
0575     input_report_abs(input, ABS_MT_WIDTH_MAJOR,
0576              raw2int(f->tool_major) << 1);
0577     input_report_abs(input, ABS_MT_WIDTH_MINOR,
0578              raw2int(f->tool_minor) << 1);
0579     input_report_abs(input, ABS_MT_ORIENTATION,
0580              MAX_FINGER_ORIENTATION - raw2int(f->orientation));
0581     input_report_abs(input, ABS_MT_POSITION_X, pos->x);
0582     input_report_abs(input, ABS_MT_POSITION_Y, pos->y);
0583 }
0584 
0585 static void report_synaptics_data(struct input_dev *input,
0586                   const struct bcm5974_config *cfg,
0587                   const struct tp_finger *f, int raw_n)
0588 {
0589     int abs_p = 0, abs_w = 0;
0590 
0591     if (raw_n) {
0592         int p = raw2int(f->touch_major);
0593         int w = raw2int(f->tool_major);
0594         if (p > 0 && raw2int(f->origin)) {
0595             abs_p = clamp_val(256 * p / cfg->p.max, 0, 255);
0596             abs_w = clamp_val(16 * w / cfg->w.max, 0, 15);
0597         }
0598     }
0599 
0600     input_report_abs(input, ABS_PRESSURE, abs_p);
0601     input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
0602 }
0603 
0604 /* report trackpad data as logical trackpad state */
0605 static int report_tp_state(struct bcm5974 *dev, int size)
0606 {
0607     const struct bcm5974_config *c = &dev->cfg;
0608     const struct tp_finger *f;
0609     struct input_dev *input = dev->input;
0610     int raw_n, i, n = 0;
0611 
0612     if (size < c->tp_header || (size - c->tp_header) % c->tp_fsize != 0)
0613         return -EIO;
0614 
0615     raw_n = (size - c->tp_header) / c->tp_fsize;
0616 
0617     for (i = 0; i < raw_n; i++) {
0618         f = get_tp_finger(dev, i);
0619         if (raw2int(f->touch_major) == 0)
0620             continue;
0621         dev->pos[n].x = raw2int(f->abs_x);
0622         dev->pos[n].y = c->y.min + c->y.max - raw2int(f->abs_y);
0623         dev->index[n++] = f;
0624     }
0625 
0626     input_mt_assign_slots(input, dev->slots, dev->pos, n, 0);
0627 
0628     for (i = 0; i < n; i++)
0629         report_finger_data(input, dev->slots[i],
0630                    &dev->pos[i], dev->index[i]);
0631 
0632     input_mt_sync_frame(input);
0633 
0634     report_synaptics_data(input, c, get_tp_finger(dev, 0), raw_n);
0635 
0636     /* later types report button events via integrated button only */
0637     if (c->caps & HAS_INTEGRATED_BUTTON) {
0638         int ibt = raw2int(dev->tp_data[c->tp_button]);
0639         input_report_key(input, BTN_LEFT, ibt);
0640     }
0641 
0642     input_sync(input);
0643 
0644     return 0;
0645 }
0646 
0647 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
0648 {
0649     const struct bcm5974_config *c = &dev->cfg;
0650     int retval = 0, size;
0651     char *data;
0652 
0653     /* Type 3 does not require a mode switch */
0654     if (c->tp_type == TYPE3)
0655         return 0;
0656 
0657     data = kmalloc(c->um_size, GFP_KERNEL);
0658     if (!data) {
0659         dev_err(&dev->intf->dev, "out of memory\n");
0660         retval = -ENOMEM;
0661         goto out;
0662     }
0663 
0664     /* read configuration */
0665     size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
0666             BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
0667             USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0668             c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
0669 
0670     if (size != c->um_size) {
0671         dev_err(&dev->intf->dev, "could not read from device\n");
0672         retval = -EIO;
0673         goto out;
0674     }
0675 
0676     /* apply the mode switch */
0677     data[c->um_switch_idx] = on ? c->um_switch_on : c->um_switch_off;
0678 
0679     /* write configuration */
0680     size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
0681             BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
0682             USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0683             c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
0684 
0685     if (size != c->um_size) {
0686         dev_err(&dev->intf->dev, "could not write to device\n");
0687         retval = -EIO;
0688         goto out;
0689     }
0690 
0691     dprintk(2, "bcm5974: switched to %s mode.\n",
0692         on ? "wellspring" : "normal");
0693 
0694  out:
0695     kfree(data);
0696     return retval;
0697 }
0698 
0699 static void bcm5974_irq_button(struct urb *urb)
0700 {
0701     struct bcm5974 *dev = urb->context;
0702     struct usb_interface *intf = dev->intf;
0703     int error;
0704 
0705     switch (urb->status) {
0706     case 0:
0707         break;
0708     case -EOVERFLOW:
0709     case -ECONNRESET:
0710     case -ENOENT:
0711     case -ESHUTDOWN:
0712         dev_dbg(&intf->dev, "button urb shutting down: %d\n",
0713             urb->status);
0714         return;
0715     default:
0716         dev_dbg(&intf->dev, "button urb status: %d\n", urb->status);
0717         goto exit;
0718     }
0719 
0720     if (report_bt_state(dev, dev->bt_urb->actual_length))
0721         dprintk(1, "bcm5974: bad button package, length: %d\n",
0722             dev->bt_urb->actual_length);
0723 
0724 exit:
0725     error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
0726     if (error)
0727         dev_err(&intf->dev, "button urb failed: %d\n", error);
0728 }
0729 
0730 static void bcm5974_irq_trackpad(struct urb *urb)
0731 {
0732     struct bcm5974 *dev = urb->context;
0733     struct usb_interface *intf = dev->intf;
0734     int error;
0735 
0736     switch (urb->status) {
0737     case 0:
0738         break;
0739     case -EOVERFLOW:
0740     case -ECONNRESET:
0741     case -ENOENT:
0742     case -ESHUTDOWN:
0743         dev_dbg(&intf->dev, "trackpad urb shutting down: %d\n",
0744             urb->status);
0745         return;
0746     default:
0747         dev_dbg(&intf->dev, "trackpad urb status: %d\n", urb->status);
0748         goto exit;
0749     }
0750 
0751     /* control response ignored */
0752     if (dev->tp_urb->actual_length == 2)
0753         goto exit;
0754 
0755     if (report_tp_state(dev, dev->tp_urb->actual_length))
0756         dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
0757             dev->tp_urb->actual_length);
0758 
0759 exit:
0760     error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
0761     if (error)
0762         dev_err(&intf->dev, "trackpad urb failed: %d\n", error);
0763 }
0764 
0765 /*
0766  * The Wellspring trackpad, like many recent Apple trackpads, share
0767  * the usb device with the keyboard. Since keyboards are usually
0768  * handled by the HID system, the device ends up being handled by two
0769  * modules. Setting up the device therefore becomes slightly
0770  * complicated. To enable multitouch features, a mode switch is
0771  * required, which is usually applied via the control interface of the
0772  * device.  It can be argued where this switch should take place. In
0773  * some drivers, like appletouch, the switch is made during
0774  * probe. However, the hid module may also alter the state of the
0775  * device, resulting in trackpad malfunction under certain
0776  * circumstances. To get around this problem, there is at least one
0777  * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
0778  * receive a reset_resume request rather than the normal resume.
0779  * Since the implementation of reset_resume is equal to mode switch
0780  * plus start_traffic, it seems easier to always do the switch when
0781  * starting traffic on the device.
0782  */
0783 static int bcm5974_start_traffic(struct bcm5974 *dev)
0784 {
0785     int error;
0786 
0787     error = bcm5974_wellspring_mode(dev, true);
0788     if (error) {
0789         dprintk(1, "bcm5974: mode switch failed\n");
0790         goto err_out;
0791     }
0792 
0793     if (dev->bt_urb) {
0794         error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
0795         if (error)
0796             goto err_reset_mode;
0797     }
0798 
0799     error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
0800     if (error)
0801         goto err_kill_bt;
0802 
0803     return 0;
0804 
0805 err_kill_bt:
0806     usb_kill_urb(dev->bt_urb);
0807 err_reset_mode:
0808     bcm5974_wellspring_mode(dev, false);
0809 err_out:
0810     return error;
0811 }
0812 
0813 static void bcm5974_pause_traffic(struct bcm5974 *dev)
0814 {
0815     usb_kill_urb(dev->tp_urb);
0816     usb_kill_urb(dev->bt_urb);
0817     bcm5974_wellspring_mode(dev, false);
0818 }
0819 
0820 /*
0821  * The code below implements open/close and manual suspend/resume.
0822  * All functions may be called in random order.
0823  *
0824  * Opening a suspended device fails with EACCES - permission denied.
0825  *
0826  * Failing a resume leaves the device resumed but closed.
0827  */
0828 static int bcm5974_open(struct input_dev *input)
0829 {
0830     struct bcm5974 *dev = input_get_drvdata(input);
0831     int error;
0832 
0833     error = usb_autopm_get_interface(dev->intf);
0834     if (error)
0835         return error;
0836 
0837     mutex_lock(&dev->pm_mutex);
0838 
0839     error = bcm5974_start_traffic(dev);
0840     if (!error)
0841         dev->opened = 1;
0842 
0843     mutex_unlock(&dev->pm_mutex);
0844 
0845     if (error)
0846         usb_autopm_put_interface(dev->intf);
0847 
0848     return error;
0849 }
0850 
0851 static void bcm5974_close(struct input_dev *input)
0852 {
0853     struct bcm5974 *dev = input_get_drvdata(input);
0854 
0855     mutex_lock(&dev->pm_mutex);
0856 
0857     bcm5974_pause_traffic(dev);
0858     dev->opened = 0;
0859 
0860     mutex_unlock(&dev->pm_mutex);
0861 
0862     usb_autopm_put_interface(dev->intf);
0863 }
0864 
0865 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
0866 {
0867     struct bcm5974 *dev = usb_get_intfdata(iface);
0868 
0869     mutex_lock(&dev->pm_mutex);
0870 
0871     if (dev->opened)
0872         bcm5974_pause_traffic(dev);
0873 
0874     mutex_unlock(&dev->pm_mutex);
0875 
0876     return 0;
0877 }
0878 
0879 static int bcm5974_resume(struct usb_interface *iface)
0880 {
0881     struct bcm5974 *dev = usb_get_intfdata(iface);
0882     int error = 0;
0883 
0884     mutex_lock(&dev->pm_mutex);
0885 
0886     if (dev->opened)
0887         error = bcm5974_start_traffic(dev);
0888 
0889     mutex_unlock(&dev->pm_mutex);
0890 
0891     return error;
0892 }
0893 
0894 static int bcm5974_probe(struct usb_interface *iface,
0895              const struct usb_device_id *id)
0896 {
0897     struct usb_device *udev = interface_to_usbdev(iface);
0898     const struct bcm5974_config *cfg;
0899     struct bcm5974 *dev;
0900     struct input_dev *input_dev;
0901     int error = -ENOMEM;
0902 
0903     /* find the product index */
0904     cfg = bcm5974_get_config(udev);
0905 
0906     /* allocate memory for our device state and initialize it */
0907     dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
0908     input_dev = input_allocate_device();
0909     if (!dev || !input_dev) {
0910         dev_err(&iface->dev, "out of memory\n");
0911         goto err_free_devs;
0912     }
0913 
0914     dev->udev = udev;
0915     dev->intf = iface;
0916     dev->input = input_dev;
0917     dev->cfg = *cfg;
0918     mutex_init(&dev->pm_mutex);
0919 
0920     /* setup urbs */
0921     if (cfg->tp_type == TYPE1) {
0922         dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
0923         if (!dev->bt_urb)
0924             goto err_free_devs;
0925     }
0926 
0927     dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
0928     if (!dev->tp_urb)
0929         goto err_free_bt_urb;
0930 
0931     if (dev->bt_urb) {
0932         dev->bt_data = usb_alloc_coherent(dev->udev,
0933                       dev->cfg.bt_datalen, GFP_KERNEL,
0934                       &dev->bt_urb->transfer_dma);
0935         if (!dev->bt_data)
0936             goto err_free_urb;
0937     }
0938 
0939     dev->tp_data = usb_alloc_coherent(dev->udev,
0940                       dev->cfg.tp_datalen, GFP_KERNEL,
0941                       &dev->tp_urb->transfer_dma);
0942     if (!dev->tp_data)
0943         goto err_free_bt_buffer;
0944 
0945     if (dev->bt_urb) {
0946         usb_fill_int_urb(dev->bt_urb, udev,
0947                  usb_rcvintpipe(udev, cfg->bt_ep),
0948                  dev->bt_data, dev->cfg.bt_datalen,
0949                  bcm5974_irq_button, dev, 1);
0950 
0951         dev->bt_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0952     }
0953 
0954     usb_fill_int_urb(dev->tp_urb, udev,
0955              usb_rcvintpipe(udev, cfg->tp_ep),
0956              dev->tp_data, dev->cfg.tp_datalen,
0957              bcm5974_irq_trackpad, dev, 1);
0958 
0959     dev->tp_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0960 
0961     /* create bcm5974 device */
0962     usb_make_path(udev, dev->phys, sizeof(dev->phys));
0963     strlcat(dev->phys, "/input0", sizeof(dev->phys));
0964 
0965     input_dev->name = "bcm5974";
0966     input_dev->phys = dev->phys;
0967     usb_to_input_id(dev->udev, &input_dev->id);
0968     /* report driver capabilities via the version field */
0969     input_dev->id.version = cfg->caps;
0970     input_dev->dev.parent = &iface->dev;
0971 
0972     input_set_drvdata(input_dev, dev);
0973 
0974     input_dev->open = bcm5974_open;
0975     input_dev->close = bcm5974_close;
0976 
0977     setup_events_to_report(input_dev, cfg);
0978 
0979     error = input_register_device(dev->input);
0980     if (error)
0981         goto err_free_buffer;
0982 
0983     /* save our data pointer in this interface device */
0984     usb_set_intfdata(iface, dev);
0985 
0986     return 0;
0987 
0988 err_free_buffer:
0989     usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
0990         dev->tp_data, dev->tp_urb->transfer_dma);
0991 err_free_bt_buffer:
0992     if (dev->bt_urb)
0993         usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
0994                   dev->bt_data, dev->bt_urb->transfer_dma);
0995 err_free_urb:
0996     usb_free_urb(dev->tp_urb);
0997 err_free_bt_urb:
0998     usb_free_urb(dev->bt_urb);
0999 err_free_devs:
1000     usb_set_intfdata(iface, NULL);
1001     input_free_device(input_dev);
1002     kfree(dev);
1003     return error;
1004 }
1005 
1006 static void bcm5974_disconnect(struct usb_interface *iface)
1007 {
1008     struct bcm5974 *dev = usb_get_intfdata(iface);
1009 
1010     usb_set_intfdata(iface, NULL);
1011 
1012     input_unregister_device(dev->input);
1013     usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
1014               dev->tp_data, dev->tp_urb->transfer_dma);
1015     if (dev->bt_urb)
1016         usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
1017                   dev->bt_data, dev->bt_urb->transfer_dma);
1018     usb_free_urb(dev->tp_urb);
1019     usb_free_urb(dev->bt_urb);
1020     kfree(dev);
1021 }
1022 
1023 static struct usb_driver bcm5974_driver = {
1024     .name           = "bcm5974",
1025     .probe          = bcm5974_probe,
1026     .disconnect     = bcm5974_disconnect,
1027     .suspend        = bcm5974_suspend,
1028     .resume         = bcm5974_resume,
1029     .id_table       = bcm5974_table,
1030     .supports_autosuspend   = 1,
1031 };
1032 
1033 module_usb_driver(bcm5974_driver);
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