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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  *  Copyright (c) 1999-2021 Petko Manolov (petkan@nucleusys.com)
0004  *
0005  */
0006 
0007 #include <linux/sched.h>
0008 #include <linux/slab.h>
0009 #include <linux/init.h>
0010 #include <linux/delay.h>
0011 #include <linux/netdevice.h>
0012 #include <linux/etherdevice.h>
0013 #include <linux/ethtool.h>
0014 #include <linux/mii.h>
0015 #include <linux/usb.h>
0016 #include <linux/module.h>
0017 #include <asm/byteorder.h>
0018 #include <linux/uaccess.h>
0019 #include "pegasus.h"
0020 
0021 /*
0022  * Version Information
0023  */
0024 #define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"
0025 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
0026 
0027 static const char driver_name[] = "pegasus";
0028 
0029 #undef  PEGASUS_WRITE_EEPROM
0030 #define BMSR_MEDIA  (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
0031             BMSR_100FULL | BMSR_ANEGCAPABLE)
0032 #define CARRIER_CHECK_DELAY (2 * HZ)
0033 
0034 static bool loopback;
0035 static bool mii_mode;
0036 static char *devid;
0037 
0038 static struct usb_eth_dev usb_dev_id[] = {
0039 #define PEGASUS_DEV(pn, vid, pid, flags)    \
0040     {.name = pn, .vendor = vid, .device = pid, .private = flags},
0041 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
0042     PEGASUS_DEV(pn, vid, pid, flags)
0043 #include "pegasus.h"
0044 #undef  PEGASUS_DEV
0045 #undef  PEGASUS_DEV_CLASS
0046     {NULL, 0, 0, 0},
0047     {NULL, 0, 0, 0}
0048 };
0049 
0050 static struct usb_device_id pegasus_ids[] = {
0051 #define PEGASUS_DEV(pn, vid, pid, flags) \
0052     {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
0053 /*
0054  * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
0055  * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
0056  * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
0057  * case anyway, seeing as the pegasus is for "Wired" adaptors.
0058  */
0059 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
0060     {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
0061     .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
0062 #include "pegasus.h"
0063 #undef  PEGASUS_DEV
0064 #undef  PEGASUS_DEV_CLASS
0065     {},
0066     {}
0067 };
0068 
0069 MODULE_AUTHOR(DRIVER_AUTHOR);
0070 MODULE_DESCRIPTION(DRIVER_DESC);
0071 MODULE_LICENSE("GPL");
0072 module_param(loopback, bool, 0);
0073 module_param(mii_mode, bool, 0);
0074 module_param(devid, charp, 0);
0075 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
0076 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
0077 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
0078 
0079 /* use ethtool to change the level for any given device */
0080 static int msg_level = -1;
0081 module_param(msg_level, int, 0);
0082 MODULE_PARM_DESC(msg_level, "Override default message level");
0083 
0084 MODULE_DEVICE_TABLE(usb, pegasus_ids);
0085 static const struct net_device_ops pegasus_netdev_ops;
0086 
0087 /*****/
0088 
0089 static void async_ctrl_callback(struct urb *urb)
0090 {
0091     struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
0092     int status = urb->status;
0093 
0094     if (status < 0)
0095         dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
0096     kfree(req);
0097     usb_free_urb(urb);
0098 }
0099 
0100 static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
0101 {
0102     return usb_control_msg_recv(pegasus->usb, 0, PEGASUS_REQ_GET_REGS,
0103                    PEGASUS_REQT_READ, 0, indx, data, size,
0104                    1000, GFP_NOIO);
0105 }
0106 
0107 static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
0108              const void *data)
0109 {
0110     int ret;
0111 
0112     ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REGS,
0113                     PEGASUS_REQT_WRITE, 0, indx, data, size,
0114                     1000, GFP_NOIO);
0115     if (ret < 0)
0116         netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);
0117 
0118     return ret;
0119 }
0120 
0121 /*
0122  * There is only one way to write to a single ADM8511 register and this is via
0123  * specific control request.  'data' is ignored by the device, but it is here to
0124  * not break the API.
0125  */
0126 static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
0127 {
0128     void *buf = &data;
0129     int ret;
0130 
0131     ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REG,
0132                     PEGASUS_REQT_WRITE, data, indx, buf, 1,
0133                     1000, GFP_NOIO);
0134     if (ret < 0)
0135         netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);
0136 
0137     return ret;
0138 }
0139 
0140 static int update_eth_regs_async(pegasus_t *pegasus)
0141 {
0142     int ret = -ENOMEM;
0143     struct urb *async_urb;
0144     struct usb_ctrlrequest *req;
0145 
0146     req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
0147     if (req == NULL)
0148         return ret;
0149 
0150     async_urb = usb_alloc_urb(0, GFP_ATOMIC);
0151     if (async_urb == NULL) {
0152         kfree(req);
0153         return ret;
0154     }
0155     req->bRequestType = PEGASUS_REQT_WRITE;
0156     req->bRequest = PEGASUS_REQ_SET_REGS;
0157     req->wValue = cpu_to_le16(0);
0158     req->wIndex = cpu_to_le16(EthCtrl0);
0159     req->wLength = cpu_to_le16(3);
0160 
0161     usb_fill_control_urb(async_urb, pegasus->usb,
0162                  usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
0163                  pegasus->eth_regs, 3, async_ctrl_callback, req);
0164 
0165     ret = usb_submit_urb(async_urb, GFP_ATOMIC);
0166     if (ret) {
0167         if (ret == -ENODEV)
0168             netif_device_detach(pegasus->net);
0169         netif_err(pegasus, drv, pegasus->net,
0170               "%s returned %d\n", __func__, ret);
0171     }
0172     return ret;
0173 }
0174 
0175 static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
0176 {
0177     int i, ret;
0178     __le16 regdi;
0179     __u8 data[4] = { phy, 0, 0, indx };
0180 
0181     if (cmd & PHY_WRITE) {
0182         __le16 *t = (__le16 *) & data[1];
0183         *t = cpu_to_le16(*regd);
0184     }
0185     set_register(p, PhyCtrl, 0);
0186     set_registers(p, PhyAddr, sizeof(data), data);
0187     set_register(p, PhyCtrl, (indx | cmd));
0188     for (i = 0; i < REG_TIMEOUT; i++) {
0189         ret = get_registers(p, PhyCtrl, 1, data);
0190         if (ret < 0)
0191             goto fail;
0192         if (data[0] & PHY_DONE)
0193             break;
0194     }
0195     if (i >= REG_TIMEOUT) {
0196         ret = -ETIMEDOUT;
0197         goto fail;
0198     }
0199     if (cmd & PHY_READ) {
0200         ret = get_registers(p, PhyData, 2, &regdi);
0201         if (ret < 0)
0202             goto fail;
0203         *regd = le16_to_cpu(regdi);
0204     }
0205     return 0;
0206 fail:
0207     netif_dbg(p, drv, p->net, "%s failed\n", __func__);
0208     return ret;
0209 }
0210 
0211 /* Returns non-negative int on success, error on failure */
0212 static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
0213 {
0214     return __mii_op(pegasus, phy, indx, regd, PHY_READ);
0215 }
0216 
0217 /* Returns zero on success, error on failure */
0218 static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
0219 {
0220     return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
0221 }
0222 
0223 static int mdio_read(struct net_device *dev, int phy_id, int loc)
0224 {
0225     pegasus_t *pegasus = netdev_priv(dev);
0226     int ret;
0227     u16 res;
0228 
0229     ret = read_mii_word(pegasus, phy_id, loc, &res);
0230     if (ret < 0)
0231         return ret;
0232 
0233     return (int)res;
0234 }
0235 
0236 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
0237 {
0238     pegasus_t *pegasus = netdev_priv(dev);
0239     u16 data = val;
0240 
0241     write_mii_word(pegasus, phy_id, loc, &data);
0242 }
0243 
0244 static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
0245 {
0246     int ret, i;
0247     __le16 retdatai;
0248     __u8 tmp = 0;
0249 
0250     set_register(pegasus, EpromCtrl, 0);
0251     set_register(pegasus, EpromOffset, index);
0252     set_register(pegasus, EpromCtrl, EPROM_READ);
0253 
0254     for (i = 0; i < REG_TIMEOUT; i++) {
0255         ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
0256         if (ret < 0)
0257             goto fail;
0258         if (tmp & EPROM_DONE)
0259             break;
0260     }
0261     if (i >= REG_TIMEOUT) {
0262         ret = -ETIMEDOUT;
0263         goto fail;
0264     }
0265 
0266     ret = get_registers(pegasus, EpromData, 2, &retdatai);
0267     if (ret < 0)
0268         goto fail;
0269     *retdata = le16_to_cpu(retdatai);
0270     return ret;
0271 
0272 fail:
0273     netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
0274     return ret;
0275 }
0276 
0277 #ifdef  PEGASUS_WRITE_EEPROM
0278 static inline void enable_eprom_write(pegasus_t *pegasus)
0279 {
0280     __u8 tmp;
0281 
0282     get_registers(pegasus, EthCtrl2, 1, &tmp);
0283     set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
0284 }
0285 
0286 static inline void disable_eprom_write(pegasus_t *pegasus)
0287 {
0288     __u8 tmp;
0289 
0290     get_registers(pegasus, EthCtrl2, 1, &tmp);
0291     set_register(pegasus, EpromCtrl, 0);
0292     set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
0293 }
0294 
0295 static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
0296 {
0297     int i;
0298     __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
0299     int ret;
0300     __le16 le_data = cpu_to_le16(data);
0301 
0302     set_registers(pegasus, EpromOffset, 4, d);
0303     enable_eprom_write(pegasus);
0304     set_register(pegasus, EpromOffset, index);
0305     set_registers(pegasus, EpromData, 2, &le_data);
0306     set_register(pegasus, EpromCtrl, EPROM_WRITE);
0307 
0308     for (i = 0; i < REG_TIMEOUT; i++) {
0309         ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
0310         if (ret == -ESHUTDOWN)
0311             goto fail;
0312         if (tmp & EPROM_DONE)
0313             break;
0314     }
0315     disable_eprom_write(pegasus);
0316     if (i >= REG_TIMEOUT)
0317         goto fail;
0318 
0319     return ret;
0320 
0321 fail:
0322     netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
0323     return -ETIMEDOUT;
0324 }
0325 #endif  /* PEGASUS_WRITE_EEPROM */
0326 
0327 static inline int get_node_id(pegasus_t *pegasus, u8 *id)
0328 {
0329     int i, ret;
0330     u16 w16;
0331 
0332     for (i = 0; i < 3; i++) {
0333         ret = read_eprom_word(pegasus, i, &w16);
0334         if (ret < 0)
0335             return ret;
0336         ((__le16 *) id)[i] = cpu_to_le16(w16);
0337     }
0338 
0339     return 0;
0340 }
0341 
0342 static void set_ethernet_addr(pegasus_t *pegasus)
0343 {
0344     int ret;
0345     u8 node_id[6];
0346 
0347     if (pegasus->features & PEGASUS_II) {
0348         ret = get_registers(pegasus, 0x10, sizeof(node_id), node_id);
0349         if (ret < 0)
0350             goto err;
0351     } else {
0352         ret = get_node_id(pegasus, node_id);
0353         if (ret < 0)
0354             goto err;
0355         ret = set_registers(pegasus, EthID, sizeof(node_id), node_id);
0356         if (ret < 0)
0357             goto err;
0358     }
0359 
0360     eth_hw_addr_set(pegasus->net, node_id);
0361 
0362     return;
0363 err:
0364     eth_hw_addr_random(pegasus->net);
0365     netif_dbg(pegasus, drv, pegasus->net, "software assigned MAC address.\n");
0366 
0367     return;
0368 }
0369 
0370 static inline int reset_mac(pegasus_t *pegasus)
0371 {
0372     int ret, i;
0373     __u8 data = 0x8;
0374 
0375     set_register(pegasus, EthCtrl1, data);
0376     for (i = 0; i < REG_TIMEOUT; i++) {
0377         ret = get_registers(pegasus, EthCtrl1, 1, &data);
0378         if (ret < 0)
0379             goto fail;
0380         if (~data & 0x08) {
0381             if (loopback)
0382                 break;
0383             if (mii_mode && (pegasus->features & HAS_HOME_PNA))
0384                 set_register(pegasus, Gpio1, 0x34);
0385             else
0386                 set_register(pegasus, Gpio1, 0x26);
0387             set_register(pegasus, Gpio0, pegasus->features);
0388             set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
0389             break;
0390         }
0391     }
0392     if (i == REG_TIMEOUT)
0393         return -ETIMEDOUT;
0394 
0395     if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
0396         usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
0397         set_register(pegasus, Gpio0, 0x24);
0398         set_register(pegasus, Gpio0, 0x26);
0399     }
0400     if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
0401         __u16 auxmode;
0402         ret = read_mii_word(pegasus, 3, 0x1b, &auxmode);
0403         if (ret < 0)
0404             goto fail;
0405         auxmode |= 4;
0406         write_mii_word(pegasus, 3, 0x1b, &auxmode);
0407     }
0408 
0409     return 0;
0410 fail:
0411     netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
0412     return ret;
0413 }
0414 
0415 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
0416 {
0417     pegasus_t *pegasus = netdev_priv(dev);
0418     int ret;
0419     __u16 linkpart;
0420     __u8 data[4];
0421 
0422     ret = read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
0423     if (ret < 0)
0424         goto fail;
0425     data[0] = 0xc8; /* TX & RX enable, append status, no CRC */
0426     data[1] = 0;
0427     if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
0428         data[1] |= 0x20;    /* set full duplex */
0429     if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
0430         data[1] |= 0x10;    /* set 100 Mbps */
0431     if (mii_mode)
0432         data[1] = 0;
0433     data[2] = loopback ? 0x09 : 0x01;
0434 
0435     memcpy(pegasus->eth_regs, data, sizeof(data));
0436     ret = set_registers(pegasus, EthCtrl0, 3, data);
0437 
0438     if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
0439         usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
0440         usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
0441         u16 auxmode;
0442         ret = read_mii_word(pegasus, 0, 0x1b, &auxmode);
0443         if (ret < 0)
0444             goto fail;
0445         auxmode |= 4;
0446         write_mii_word(pegasus, 0, 0x1b, &auxmode);
0447     }
0448 
0449     return ret;
0450 fail:
0451     netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
0452     return ret;
0453 }
0454 
0455 static void read_bulk_callback(struct urb *urb)
0456 {
0457     pegasus_t *pegasus = urb->context;
0458     struct net_device *net;
0459     u8 *buf = urb->transfer_buffer;
0460     int rx_status, count = urb->actual_length;
0461     int status = urb->status;
0462     __u16 pkt_len;
0463 
0464     if (!pegasus)
0465         return;
0466 
0467     net = pegasus->net;
0468     if (!netif_device_present(net) || !netif_running(net))
0469         return;
0470 
0471     switch (status) {
0472     case 0:
0473         break;
0474     case -ETIME:
0475         netif_dbg(pegasus, rx_err, net, "reset MAC\n");
0476         pegasus->flags &= ~PEGASUS_RX_BUSY;
0477         break;
0478     case -EPIPE:        /* stall, or disconnect from TT */
0479         /* FIXME schedule work to clear the halt */
0480         netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
0481         return;
0482     case -ENOENT:
0483     case -ECONNRESET:
0484     case -ESHUTDOWN:
0485         netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
0486         return;
0487     default:
0488         netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
0489         goto goon;
0490     }
0491 
0492     if (count < 4)
0493         goto goon;
0494 
0495     rx_status = buf[count - 2];
0496     if (rx_status & 0x1c) {
0497         netif_dbg(pegasus, rx_err, net,
0498               "RX packet error %x\n", rx_status);
0499         net->stats.rx_errors++;
0500         if (rx_status & 0x04)   /* runt */
0501             net->stats.rx_length_errors++;
0502         if (rx_status & 0x08)
0503             net->stats.rx_crc_errors++;
0504         if (rx_status & 0x10)   /* extra bits   */
0505             net->stats.rx_frame_errors++;
0506         goto goon;
0507     }
0508     if (pegasus->chip == 0x8513) {
0509         pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
0510         pkt_len &= 0x0fff;
0511         pegasus->rx_skb->data += 2;
0512     } else {
0513         pkt_len = buf[count - 3] << 8;
0514         pkt_len += buf[count - 4];
0515         pkt_len &= 0xfff;
0516         pkt_len -= 4;
0517     }
0518 
0519     /*
0520      * If the packet is unreasonably long, quietly drop it rather than
0521      * kernel panicing by calling skb_put.
0522      */
0523     if (pkt_len > PEGASUS_MTU)
0524         goto goon;
0525 
0526     /*
0527      * at this point we are sure pegasus->rx_skb != NULL
0528      * so we go ahead and pass up the packet.
0529      */
0530     skb_put(pegasus->rx_skb, pkt_len);
0531     pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
0532     netif_rx(pegasus->rx_skb);
0533     net->stats.rx_packets++;
0534     net->stats.rx_bytes += pkt_len;
0535 
0536     if (pegasus->flags & PEGASUS_UNPLUG)
0537         return;
0538 
0539     pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
0540                               GFP_ATOMIC);
0541 
0542     if (pegasus->rx_skb == NULL)
0543         goto tl_sched;
0544 goon:
0545     usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
0546               usb_rcvbulkpipe(pegasus->usb, 1),
0547               pegasus->rx_skb->data, PEGASUS_MTU,
0548               read_bulk_callback, pegasus);
0549     rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
0550     if (rx_status == -ENODEV)
0551         netif_device_detach(pegasus->net);
0552     else if (rx_status) {
0553         pegasus->flags |= PEGASUS_RX_URB_FAIL;
0554         goto tl_sched;
0555     } else {
0556         pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
0557     }
0558 
0559     return;
0560 
0561 tl_sched:
0562     tasklet_schedule(&pegasus->rx_tl);
0563 }
0564 
0565 static void rx_fixup(struct tasklet_struct *t)
0566 {
0567     pegasus_t *pegasus = from_tasklet(pegasus, t, rx_tl);
0568     int status;
0569 
0570     if (pegasus->flags & PEGASUS_UNPLUG)
0571         return;
0572 
0573     if (pegasus->flags & PEGASUS_RX_URB_FAIL)
0574         if (pegasus->rx_skb)
0575             goto try_again;
0576     if (pegasus->rx_skb == NULL)
0577         pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
0578                                   PEGASUS_MTU,
0579                                   GFP_ATOMIC);
0580     if (pegasus->rx_skb == NULL) {
0581         netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
0582         tasklet_schedule(&pegasus->rx_tl);
0583         return;
0584     }
0585     usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
0586               usb_rcvbulkpipe(pegasus->usb, 1),
0587               pegasus->rx_skb->data, PEGASUS_MTU,
0588               read_bulk_callback, pegasus);
0589 try_again:
0590     status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
0591     if (status == -ENODEV)
0592         netif_device_detach(pegasus->net);
0593     else if (status) {
0594         pegasus->flags |= PEGASUS_RX_URB_FAIL;
0595         tasklet_schedule(&pegasus->rx_tl);
0596     } else {
0597         pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
0598     }
0599 }
0600 
0601 static void write_bulk_callback(struct urb *urb)
0602 {
0603     pegasus_t *pegasus = urb->context;
0604     struct net_device *net;
0605     int status = urb->status;
0606 
0607     if (!pegasus)
0608         return;
0609 
0610     net = pegasus->net;
0611 
0612     if (!netif_device_present(net) || !netif_running(net))
0613         return;
0614 
0615     switch (status) {
0616     case -EPIPE:
0617         /* FIXME schedule_work() to clear the tx halt */
0618         netif_stop_queue(net);
0619         netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
0620         return;
0621     case -ENOENT:
0622     case -ECONNRESET:
0623     case -ESHUTDOWN:
0624         netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
0625         return;
0626     default:
0627         netif_info(pegasus, tx_err, net, "TX status %d\n", status);
0628         fallthrough;
0629     case 0:
0630         break;
0631     }
0632 
0633     netif_trans_update(net); /* prevent tx timeout */
0634     netif_wake_queue(net);
0635 }
0636 
0637 static void intr_callback(struct urb *urb)
0638 {
0639     pegasus_t *pegasus = urb->context;
0640     struct net_device *net;
0641     int res, status = urb->status;
0642 
0643     if (!pegasus)
0644         return;
0645     net = pegasus->net;
0646 
0647     switch (status) {
0648     case 0:
0649         break;
0650     case -ECONNRESET:   /* unlink */
0651     case -ENOENT:
0652     case -ESHUTDOWN:
0653         return;
0654     default:
0655         /* some Pegasus-I products report LOTS of data
0656          * toggle errors... avoid log spamming
0657          */
0658         netif_dbg(pegasus, timer, net, "intr status %d\n", status);
0659     }
0660 
0661     if (urb->actual_length >= 6) {
0662         u8 *d = urb->transfer_buffer;
0663 
0664         /* byte 0 == tx_status1, reg 2B */
0665         if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
0666                     |LATE_COL|JABBER_TIMEOUT)) {
0667             net->stats.tx_errors++;
0668             if (d[0] & TX_UNDERRUN)
0669                 net->stats.tx_fifo_errors++;
0670             if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
0671                 net->stats.tx_aborted_errors++;
0672             if (d[0] & LATE_COL)
0673                 net->stats.tx_window_errors++;
0674         }
0675 
0676         /* d[5].LINK_STATUS lies on some adapters.
0677          * d[0].NO_CARRIER kicks in only with failed TX.
0678          * ... so monitoring with MII may be safest.
0679          */
0680 
0681         /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
0682         net->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
0683     }
0684 
0685     res = usb_submit_urb(urb, GFP_ATOMIC);
0686     if (res == -ENODEV)
0687         netif_device_detach(pegasus->net);
0688     if (res)
0689         netif_err(pegasus, timer, net,
0690               "can't resubmit interrupt urb, %d\n", res);
0691 }
0692 
0693 static void pegasus_tx_timeout(struct net_device *net, unsigned int txqueue)
0694 {
0695     pegasus_t *pegasus = netdev_priv(net);
0696     netif_warn(pegasus, timer, net, "tx timeout\n");
0697     usb_unlink_urb(pegasus->tx_urb);
0698     net->stats.tx_errors++;
0699 }
0700 
0701 static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
0702                         struct net_device *net)
0703 {
0704     pegasus_t *pegasus = netdev_priv(net);
0705     int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
0706     int res;
0707     __u16 l16 = skb->len;
0708 
0709     netif_stop_queue(net);
0710 
0711     ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
0712     skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
0713     usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
0714               usb_sndbulkpipe(pegasus->usb, 2),
0715               pegasus->tx_buff, count,
0716               write_bulk_callback, pegasus);
0717     if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
0718         netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
0719         switch (res) {
0720         case -EPIPE:        /* stall, or disconnect from TT */
0721             /* cleanup should already have been scheduled */
0722             break;
0723         case -ENODEV:       /* disconnect() upcoming */
0724         case -EPERM:
0725             netif_device_detach(pegasus->net);
0726             break;
0727         default:
0728             net->stats.tx_errors++;
0729             netif_start_queue(net);
0730         }
0731     } else {
0732         net->stats.tx_packets++;
0733         net->stats.tx_bytes += skb->len;
0734     }
0735     dev_kfree_skb(skb);
0736 
0737     return NETDEV_TX_OK;
0738 }
0739 
0740 static inline void disable_net_traffic(pegasus_t *pegasus)
0741 {
0742     __le16 tmp = cpu_to_le16(0);
0743 
0744     set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
0745 }
0746 
0747 static inline int get_interrupt_interval(pegasus_t *pegasus)
0748 {
0749     u16 data;
0750     u8 interval;
0751     int ret;
0752 
0753     ret = read_eprom_word(pegasus, 4, &data);
0754     if (ret < 0)
0755         return ret;
0756 
0757     interval = data >> 8;
0758     if (pegasus->usb->speed != USB_SPEED_HIGH) {
0759         if (interval < 0x80) {
0760             netif_info(pegasus, timer, pegasus->net,
0761                    "intr interval changed from %ums to %ums\n",
0762                    interval, 0x80);
0763             interval = 0x80;
0764             data = (data & 0x00FF) | ((u16)interval << 8);
0765 #ifdef PEGASUS_WRITE_EEPROM
0766             write_eprom_word(pegasus, 4, data);
0767 #endif
0768         }
0769     }
0770     pegasus->intr_interval = interval;
0771 
0772     return 0;
0773 }
0774 
0775 static void set_carrier(struct net_device *net)
0776 {
0777     pegasus_t *pegasus = netdev_priv(net);
0778     u16 tmp;
0779 
0780     if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
0781         return;
0782 
0783     if (tmp & BMSR_LSTATUS)
0784         netif_carrier_on(net);
0785     else
0786         netif_carrier_off(net);
0787 }
0788 
0789 static void free_all_urbs(pegasus_t *pegasus)
0790 {
0791     usb_free_urb(pegasus->intr_urb);
0792     usb_free_urb(pegasus->tx_urb);
0793     usb_free_urb(pegasus->rx_urb);
0794 }
0795 
0796 static void unlink_all_urbs(pegasus_t *pegasus)
0797 {
0798     usb_kill_urb(pegasus->intr_urb);
0799     usb_kill_urb(pegasus->tx_urb);
0800     usb_kill_urb(pegasus->rx_urb);
0801 }
0802 
0803 static int alloc_urbs(pegasus_t *pegasus)
0804 {
0805     int res = -ENOMEM;
0806 
0807     pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
0808     if (!pegasus->rx_urb) {
0809         return res;
0810     }
0811     pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
0812     if (!pegasus->tx_urb) {
0813         usb_free_urb(pegasus->rx_urb);
0814         return res;
0815     }
0816     pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
0817     if (!pegasus->intr_urb) {
0818         usb_free_urb(pegasus->tx_urb);
0819         usb_free_urb(pegasus->rx_urb);
0820         return res;
0821     }
0822 
0823     return 0;
0824 }
0825 
0826 static int pegasus_open(struct net_device *net)
0827 {
0828     pegasus_t *pegasus = netdev_priv(net);
0829     int res=-ENOMEM;
0830 
0831     if (pegasus->rx_skb == NULL)
0832         pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
0833                                   PEGASUS_MTU,
0834                                   GFP_KERNEL);
0835     if (!pegasus->rx_skb)
0836         goto exit;
0837 
0838     set_registers(pegasus, EthID, 6, net->dev_addr);
0839 
0840     usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
0841               usb_rcvbulkpipe(pegasus->usb, 1),
0842               pegasus->rx_skb->data, PEGASUS_MTU,
0843               read_bulk_callback, pegasus);
0844     if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
0845         if (res == -ENODEV)
0846             netif_device_detach(pegasus->net);
0847         netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
0848         goto exit;
0849     }
0850 
0851     usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
0852              usb_rcvintpipe(pegasus->usb, 3),
0853              pegasus->intr_buff, sizeof(pegasus->intr_buff),
0854              intr_callback, pegasus, pegasus->intr_interval);
0855     if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
0856         if (res == -ENODEV)
0857             netif_device_detach(pegasus->net);
0858         netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
0859         usb_kill_urb(pegasus->rx_urb);
0860         goto exit;
0861     }
0862     res = enable_net_traffic(net, pegasus->usb);
0863     if (res < 0) {
0864         netif_dbg(pegasus, ifup, net,
0865               "can't enable_net_traffic() - %d\n", res);
0866         res = -EIO;
0867         usb_kill_urb(pegasus->rx_urb);
0868         usb_kill_urb(pegasus->intr_urb);
0869         goto exit;
0870     }
0871     set_carrier(net);
0872     netif_start_queue(net);
0873     netif_dbg(pegasus, ifup, net, "open\n");
0874     res = 0;
0875 exit:
0876     return res;
0877 }
0878 
0879 static int pegasus_close(struct net_device *net)
0880 {
0881     pegasus_t *pegasus = netdev_priv(net);
0882 
0883     netif_stop_queue(net);
0884     if (!(pegasus->flags & PEGASUS_UNPLUG))
0885         disable_net_traffic(pegasus);
0886     tasklet_kill(&pegasus->rx_tl);
0887     unlink_all_urbs(pegasus);
0888 
0889     return 0;
0890 }
0891 
0892 static void pegasus_get_drvinfo(struct net_device *dev,
0893                 struct ethtool_drvinfo *info)
0894 {
0895     pegasus_t *pegasus = netdev_priv(dev);
0896 
0897     strlcpy(info->driver, driver_name, sizeof(info->driver));
0898     usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
0899 }
0900 
0901 /* also handles three patterns of some kind in hardware */
0902 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
0903 
0904 static void
0905 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
0906 {
0907     pegasus_t   *pegasus = netdev_priv(dev);
0908 
0909     wol->supported = WAKE_MAGIC | WAKE_PHY;
0910     wol->wolopts = pegasus->wolopts;
0911 }
0912 
0913 static int
0914 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
0915 {
0916     pegasus_t   *pegasus = netdev_priv(dev);
0917     u8      reg78 = 0x04;
0918     int     ret;
0919 
0920     if (wol->wolopts & ~WOL_SUPPORTED)
0921         return -EINVAL;
0922 
0923     if (wol->wolopts & WAKE_MAGIC)
0924         reg78 |= 0x80;
0925     if (wol->wolopts & WAKE_PHY)
0926         reg78 |= 0x40;
0927     /* FIXME this 0x10 bit still needs to get set in the chip... */
0928     if (wol->wolopts)
0929         pegasus->eth_regs[0] |= 0x10;
0930     else
0931         pegasus->eth_regs[0] &= ~0x10;
0932     pegasus->wolopts = wol->wolopts;
0933 
0934     ret = set_register(pegasus, WakeupControl, reg78);
0935     if (!ret)
0936         ret = device_set_wakeup_enable(&pegasus->usb->dev,
0937                         wol->wolopts);
0938     return ret;
0939 }
0940 
0941 static inline void pegasus_reset_wol(struct net_device *dev)
0942 {
0943     struct ethtool_wolinfo wol;
0944 
0945     memset(&wol, 0, sizeof wol);
0946     (void) pegasus_set_wol(dev, &wol);
0947 }
0948 
0949 static int
0950 pegasus_get_link_ksettings(struct net_device *dev,
0951                struct ethtool_link_ksettings *ecmd)
0952 {
0953     pegasus_t *pegasus;
0954 
0955     pegasus = netdev_priv(dev);
0956     mii_ethtool_get_link_ksettings(&pegasus->mii, ecmd);
0957     return 0;
0958 }
0959 
0960 static int
0961 pegasus_set_link_ksettings(struct net_device *dev,
0962                const struct ethtool_link_ksettings *ecmd)
0963 {
0964     pegasus_t *pegasus = netdev_priv(dev);
0965     return mii_ethtool_set_link_ksettings(&pegasus->mii, ecmd);
0966 }
0967 
0968 static int pegasus_nway_reset(struct net_device *dev)
0969 {
0970     pegasus_t *pegasus = netdev_priv(dev);
0971     return mii_nway_restart(&pegasus->mii);
0972 }
0973 
0974 static u32 pegasus_get_link(struct net_device *dev)
0975 {
0976     pegasus_t *pegasus = netdev_priv(dev);
0977     return mii_link_ok(&pegasus->mii);
0978 }
0979 
0980 static u32 pegasus_get_msglevel(struct net_device *dev)
0981 {
0982     pegasus_t *pegasus = netdev_priv(dev);
0983     return pegasus->msg_enable;
0984 }
0985 
0986 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
0987 {
0988     pegasus_t *pegasus = netdev_priv(dev);
0989     pegasus->msg_enable = v;
0990 }
0991 
0992 static const struct ethtool_ops ops = {
0993     .get_drvinfo = pegasus_get_drvinfo,
0994     .nway_reset = pegasus_nway_reset,
0995     .get_link = pegasus_get_link,
0996     .get_msglevel = pegasus_get_msglevel,
0997     .set_msglevel = pegasus_set_msglevel,
0998     .get_wol = pegasus_get_wol,
0999     .set_wol = pegasus_set_wol,
1000     .get_link_ksettings = pegasus_get_link_ksettings,
1001     .set_link_ksettings = pegasus_set_link_ksettings,
1002 };
1003 
1004 static int pegasus_siocdevprivate(struct net_device *net, struct ifreq *rq,
1005                   void __user *udata, int cmd)
1006 {
1007     __u16 *data = (__u16 *) &rq->ifr_ifru;
1008     pegasus_t *pegasus = netdev_priv(net);
1009     int res;
1010 
1011     switch (cmd) {
1012     case SIOCDEVPRIVATE:
1013         data[0] = pegasus->phy;
1014         fallthrough;
1015     case SIOCDEVPRIVATE + 1:
1016         res = read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1017         break;
1018     case SIOCDEVPRIVATE + 2:
1019         if (!capable(CAP_NET_ADMIN))
1020             return -EPERM;
1021         write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
1022         res = 0;
1023         break;
1024     default:
1025         res = -EOPNOTSUPP;
1026     }
1027     return res;
1028 }
1029 
1030 static void pegasus_set_multicast(struct net_device *net)
1031 {
1032     pegasus_t *pegasus = netdev_priv(net);
1033 
1034     if (net->flags & IFF_PROMISC) {
1035         pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1036         netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1037     } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1038         pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1039         pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1040         netif_dbg(pegasus, link, net, "set allmulti\n");
1041     } else {
1042         pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1043         pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1044     }
1045     update_eth_regs_async(pegasus);
1046 }
1047 
1048 static __u8 mii_phy_probe(pegasus_t *pegasus)
1049 {
1050     int i, ret;
1051     __u16 tmp;
1052 
1053     for (i = 0; i < 32; i++) {
1054         ret = read_mii_word(pegasus, i, MII_BMSR, &tmp);
1055         if (ret < 0)
1056             goto fail;
1057         if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1058             continue;
1059         else
1060             return i;
1061     }
1062 fail:
1063     return 0xff;
1064 }
1065 
1066 static inline void setup_pegasus_II(pegasus_t *pegasus)
1067 {
1068     int ret;
1069     __u8 data = 0xa5;
1070 
1071     set_register(pegasus, Reg1d, 0);
1072     set_register(pegasus, Reg7b, 1);
1073     msleep(100);
1074     if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1075         set_register(pegasus, Reg7b, 0);
1076     else
1077         set_register(pegasus, Reg7b, 2);
1078 
1079     set_register(pegasus, 0x83, data);
1080     ret = get_registers(pegasus, 0x83, 1, &data);
1081     if (ret < 0)
1082         goto fail;
1083 
1084     if (data == 0xa5)
1085         pegasus->chip = 0x8513;
1086     else
1087         pegasus->chip = 0;
1088 
1089     set_register(pegasus, 0x80, 0xc0);
1090     set_register(pegasus, 0x83, 0xff);
1091     set_register(pegasus, 0x84, 0x01);
1092 
1093     if (pegasus->features & HAS_HOME_PNA && mii_mode)
1094         set_register(pegasus, Reg81, 6);
1095     else
1096         set_register(pegasus, Reg81, 2);
1097 
1098     return;
1099 fail:
1100     netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);
1101 }
1102 
1103 static void check_carrier(struct work_struct *work)
1104 {
1105     pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1106     set_carrier(pegasus->net);
1107     if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1108         queue_delayed_work(system_long_wq, &pegasus->carrier_check,
1109             CARRIER_CHECK_DELAY);
1110     }
1111 }
1112 
1113 static int pegasus_blacklisted(struct usb_device *udev)
1114 {
1115     struct usb_device_descriptor *udd = &udev->descriptor;
1116 
1117     /* Special quirk to keep the driver from handling the Belkin Bluetooth
1118      * dongle which happens to have the same ID.
1119      */
1120     if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1121         (udd->idProduct == cpu_to_le16(0x0121)) &&
1122         (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1123         (udd->bDeviceProtocol == 1))
1124         return 1;
1125 
1126     return 0;
1127 }
1128 
1129 static int pegasus_probe(struct usb_interface *intf,
1130              const struct usb_device_id *id)
1131 {
1132     struct usb_device *dev = interface_to_usbdev(intf);
1133     struct net_device *net;
1134     pegasus_t *pegasus;
1135     int dev_index = id - pegasus_ids;
1136     int res = -ENOMEM;
1137 
1138     if (pegasus_blacklisted(dev))
1139         return -ENODEV;
1140 
1141     net = alloc_etherdev(sizeof(struct pegasus));
1142     if (!net)
1143         goto out;
1144 
1145     pegasus = netdev_priv(net);
1146     pegasus->dev_index = dev_index;
1147 
1148     res = alloc_urbs(pegasus);
1149     if (res < 0) {
1150         dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1151         goto out1;
1152     }
1153 
1154     tasklet_setup(&pegasus->rx_tl, rx_fixup);
1155 
1156     INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1157 
1158     pegasus->intf = intf;
1159     pegasus->usb = dev;
1160     pegasus->net = net;
1161 
1162 
1163     net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1164     net->netdev_ops = &pegasus_netdev_ops;
1165     net->ethtool_ops = &ops;
1166     pegasus->mii.dev = net;
1167     pegasus->mii.mdio_read = mdio_read;
1168     pegasus->mii.mdio_write = mdio_write;
1169     pegasus->mii.phy_id_mask = 0x1f;
1170     pegasus->mii.reg_num_mask = 0x1f;
1171     pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1172                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1173 
1174     pegasus->features = usb_dev_id[dev_index].private;
1175     res = get_interrupt_interval(pegasus);
1176     if (res)
1177         goto out2;
1178     if (reset_mac(pegasus)) {
1179         dev_err(&intf->dev, "can't reset MAC\n");
1180         res = -EIO;
1181         goto out2;
1182     }
1183     set_ethernet_addr(pegasus);
1184     if (pegasus->features & PEGASUS_II) {
1185         dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1186         setup_pegasus_II(pegasus);
1187     }
1188     pegasus->phy = mii_phy_probe(pegasus);
1189     if (pegasus->phy == 0xff) {
1190         dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1191         pegasus->phy = 1;
1192     }
1193     pegasus->mii.phy_id = pegasus->phy;
1194     usb_set_intfdata(intf, pegasus);
1195     SET_NETDEV_DEV(net, &intf->dev);
1196     pegasus_reset_wol(net);
1197     res = register_netdev(net);
1198     if (res)
1199         goto out3;
1200     queue_delayed_work(system_long_wq, &pegasus->carrier_check,
1201                CARRIER_CHECK_DELAY);
1202     dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
1203          usb_dev_id[dev_index].name, net->dev_addr);
1204     return 0;
1205 
1206 out3:
1207     usb_set_intfdata(intf, NULL);
1208 out2:
1209     free_all_urbs(pegasus);
1210 out1:
1211     free_netdev(net);
1212 out:
1213     return res;
1214 }
1215 
1216 static void pegasus_disconnect(struct usb_interface *intf)
1217 {
1218     struct pegasus *pegasus = usb_get_intfdata(intf);
1219 
1220     usb_set_intfdata(intf, NULL);
1221     if (!pegasus) {
1222         dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1223         return;
1224     }
1225 
1226     pegasus->flags |= PEGASUS_UNPLUG;
1227     cancel_delayed_work_sync(&pegasus->carrier_check);
1228     unregister_netdev(pegasus->net);
1229     unlink_all_urbs(pegasus);
1230     free_all_urbs(pegasus);
1231     if (pegasus->rx_skb != NULL) {
1232         dev_kfree_skb(pegasus->rx_skb);
1233         pegasus->rx_skb = NULL;
1234     }
1235     free_netdev(pegasus->net);
1236 }
1237 
1238 static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1239 {
1240     struct pegasus *pegasus = usb_get_intfdata(intf);
1241 
1242     netif_device_detach(pegasus->net);
1243     cancel_delayed_work_sync(&pegasus->carrier_check);
1244     if (netif_running(pegasus->net)) {
1245         usb_kill_urb(pegasus->rx_urb);
1246         usb_kill_urb(pegasus->intr_urb);
1247     }
1248     return 0;
1249 }
1250 
1251 static int pegasus_resume(struct usb_interface *intf)
1252 {
1253     struct pegasus *pegasus = usb_get_intfdata(intf);
1254 
1255     netif_device_attach(pegasus->net);
1256     if (netif_running(pegasus->net)) {
1257         pegasus->rx_urb->status = 0;
1258         pegasus->rx_urb->actual_length = 0;
1259         read_bulk_callback(pegasus->rx_urb);
1260 
1261         pegasus->intr_urb->status = 0;
1262         pegasus->intr_urb->actual_length = 0;
1263         intr_callback(pegasus->intr_urb);
1264     }
1265     queue_delayed_work(system_long_wq, &pegasus->carrier_check,
1266                 CARRIER_CHECK_DELAY);
1267     return 0;
1268 }
1269 
1270 static const struct net_device_ops pegasus_netdev_ops = {
1271     .ndo_open =         pegasus_open,
1272     .ndo_stop =         pegasus_close,
1273     .ndo_siocdevprivate =       pegasus_siocdevprivate,
1274     .ndo_start_xmit =       pegasus_start_xmit,
1275     .ndo_set_rx_mode =      pegasus_set_multicast,
1276     .ndo_tx_timeout =       pegasus_tx_timeout,
1277     .ndo_set_mac_address =      eth_mac_addr,
1278     .ndo_validate_addr =        eth_validate_addr,
1279 };
1280 
1281 static struct usb_driver pegasus_driver = {
1282     .name = driver_name,
1283     .probe = pegasus_probe,
1284     .disconnect = pegasus_disconnect,
1285     .id_table = pegasus_ids,
1286     .suspend = pegasus_suspend,
1287     .resume = pegasus_resume,
1288     .disable_hub_initiated_lpm = 1,
1289 };
1290 
1291 static void __init parse_id(char *id)
1292 {
1293     unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1294     char *token, *name = NULL;
1295 
1296     if ((token = strsep(&id, ":")) != NULL)
1297         name = token;
1298     /* name now points to a null terminated string*/
1299     if ((token = strsep(&id, ":")) != NULL)
1300         vendor_id = simple_strtoul(token, NULL, 16);
1301     if ((token = strsep(&id, ":")) != NULL)
1302         device_id = simple_strtoul(token, NULL, 16);
1303     flags = simple_strtoul(id, NULL, 16);
1304     pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1305         driver_name, name, vendor_id, device_id, flags);
1306 
1307     if (vendor_id > 0x10000 || vendor_id == 0)
1308         return;
1309     if (device_id > 0x10000 || device_id == 0)
1310         return;
1311 
1312     for (i = 0; usb_dev_id[i].name; i++);
1313     usb_dev_id[i].name = name;
1314     usb_dev_id[i].vendor = vendor_id;
1315     usb_dev_id[i].device = device_id;
1316     usb_dev_id[i].private = flags;
1317     pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1318     pegasus_ids[i].idVendor = vendor_id;
1319     pegasus_ids[i].idProduct = device_id;
1320 }
1321 
1322 static int __init pegasus_init(void)
1323 {
1324     pr_info("%s: " DRIVER_DESC "\n", driver_name);
1325     if (devid)
1326         parse_id(devid);
1327     return usb_register(&pegasus_driver);
1328 }
1329 
1330 static void __exit pegasus_exit(void)
1331 {
1332     usb_deregister(&pegasus_driver);
1333 }
1334 
1335 module_init(pegasus_init);
1336 module_exit(pegasus_exit);
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