1337 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 1999-2021 Petko Manolov (petkan@nucleusys.com)4 *5 */6 7#include <linux/sched.h>8#include <linux/slab.h>9#include <linux/init.h>10#include <linux/delay.h>11#include <linux/netdevice.h>12#include <linux/etherdevice.h>13#include <linux/ethtool.h>14#include <linux/mii.h>15#include <linux/usb.h>16#include <linux/module.h>17#include <asm/byteorder.h>18#include <linux/uaccess.h>19#include "pegasus.h"20 21/*22 * Version Information23 */24#define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"25#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"26 27static const char driver_name[] = "pegasus";28 29#undef PEGASUS_WRITE_EEPROM30#define BMSR_MEDIA (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \31 BMSR_100FULL | BMSR_ANEGCAPABLE)32#define CARRIER_CHECK_DELAY (2 * HZ)33 34static bool loopback;35static bool mii_mode;36static char *devid;37 38static struct usb_eth_dev usb_dev_id[] = {39#define PEGASUS_DEV(pn, vid, pid, flags) \40 {.name = pn, .vendor = vid, .device = pid, .private = flags},41#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \42 PEGASUS_DEV(pn, vid, pid, flags)43#include "pegasus.h"44#undef PEGASUS_DEV45#undef PEGASUS_DEV_CLASS46 {NULL, 0, 0, 0},47 {NULL, 0, 0, 0}48};49 50static struct usb_device_id pegasus_ids[] = {51#define PEGASUS_DEV(pn, vid, pid, flags) \52 {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},53/*54 * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product55 * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to56 * ignore adaptors belonging to the "Wireless" class 0xE0. For this one57 * case anyway, seeing as the pegasus is for "Wired" adaptors.58 */59#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \60 {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \61 .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},62#include "pegasus.h"63#undef PEGASUS_DEV64#undef PEGASUS_DEV_CLASS65 {},66 {}67};68 69MODULE_AUTHOR(DRIVER_AUTHOR);70MODULE_DESCRIPTION(DRIVER_DESC);71MODULE_LICENSE("GPL");72module_param(loopback, bool, 0);73module_param(mii_mode, bool, 0);74module_param(devid, charp, 0);75MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");76MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");77MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");78 79/* use ethtool to change the level for any given device */80static int msg_level = -1;81module_param(msg_level, int, 0);82MODULE_PARM_DESC(msg_level, "Override default message level");83 84MODULE_DEVICE_TABLE(usb, pegasus_ids);85static const struct net_device_ops pegasus_netdev_ops;86 87/*****/88 89static void async_ctrl_callback(struct urb *urb)90{91 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;92 int status = urb->status;93 94 if (status < 0)95 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);96 kfree(req);97 usb_free_urb(urb);98}99 100static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)101{102 return usb_control_msg_recv(pegasus->usb, 0, PEGASUS_REQ_GET_REGS,103 PEGASUS_REQT_READ, 0, indx, data, size,104 1000, GFP_NOIO);105}106 107static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,108 const void *data)109{110 int ret;111 112 ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REGS,113 PEGASUS_REQT_WRITE, 0, indx, data, size,114 1000, GFP_NOIO);115 if (ret < 0)116 netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);117 118 return ret;119}120 121/*122 * There is only one way to write to a single ADM8511 register and this is via123 * specific control request. 'data' is ignored by the device, but it is here to124 * not break the API.125 */126static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)127{128 void *buf = &data;129 int ret;130 131 ret = usb_control_msg_send(pegasus->usb, 0, PEGASUS_REQ_SET_REG,132 PEGASUS_REQT_WRITE, data, indx, buf, 1,133 1000, GFP_NOIO);134 if (ret < 0)135 netif_dbg(pegasus, drv, pegasus->net, "%s failed with %d\n", __func__, ret);136 137 return ret;138}139 140static int update_eth_regs_async(pegasus_t *pegasus)141{142 int ret = -ENOMEM;143 struct urb *async_urb;144 struct usb_ctrlrequest *req;145 146 req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);147 if (req == NULL)148 return ret;149 150 async_urb = usb_alloc_urb(0, GFP_ATOMIC);151 if (async_urb == NULL) {152 kfree(req);153 return ret;154 }155 req->bRequestType = PEGASUS_REQT_WRITE;156 req->bRequest = PEGASUS_REQ_SET_REGS;157 req->wValue = cpu_to_le16(0);158 req->wIndex = cpu_to_le16(EthCtrl0);159 req->wLength = cpu_to_le16(3);160 161 usb_fill_control_urb(async_urb, pegasus->usb,162 usb_sndctrlpipe(pegasus->usb, 0), (void *)req,163 pegasus->eth_regs, 3, async_ctrl_callback, req);164 165 ret = usb_submit_urb(async_urb, GFP_ATOMIC);166 if (ret) {167 if (ret == -ENODEV)168 netif_device_detach(pegasus->net);169 netif_err(pegasus, drv, pegasus->net,170 "%s returned %d\n", __func__, ret);171 }172 return ret;173}174 175static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)176{177 int i, ret;178 __le16 regdi;179 __u8 data[4] = { phy, 0, 0, indx };180 181 if (cmd & PHY_WRITE) {182 __le16 *t = (__le16 *) & data[1];183 *t = cpu_to_le16(*regd);184 }185 set_register(p, PhyCtrl, 0);186 set_registers(p, PhyAddr, sizeof(data), data);187 set_register(p, PhyCtrl, (indx | cmd));188 for (i = 0; i < REG_TIMEOUT; i++) {189 ret = get_registers(p, PhyCtrl, 1, data);190 if (ret < 0)191 goto fail;192 if (data[0] & PHY_DONE)193 break;194 }195 if (i >= REG_TIMEOUT) {196 ret = -ETIMEDOUT;197 goto fail;198 }199 if (cmd & PHY_READ) {200 ret = get_registers(p, PhyData, 2, ®di);201 if (ret < 0)202 goto fail;203 *regd = le16_to_cpu(regdi);204 }205 return 0;206fail:207 netif_dbg(p, drv, p->net, "%s failed\n", __func__);208 return ret;209}210 211/* Returns non-negative int on success, error on failure */212static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)213{214 return __mii_op(pegasus, phy, indx, regd, PHY_READ);215}216 217/* Returns zero on success, error on failure */218static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)219{220 return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);221}222 223static int mdio_read(struct net_device *dev, int phy_id, int loc)224{225 pegasus_t *pegasus = netdev_priv(dev);226 int ret;227 u16 res;228 229 ret = read_mii_word(pegasus, phy_id, loc, &res);230 if (ret < 0)231 return ret;232 233 return (int)res;234}235 236static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)237{238 pegasus_t *pegasus = netdev_priv(dev);239 u16 data = val;240 241 write_mii_word(pegasus, phy_id, loc, &data);242}243 244static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)245{246 int ret, i;247 __le16 retdatai;248 __u8 tmp = 0;249 250 set_register(pegasus, EpromCtrl, 0);251 set_register(pegasus, EpromOffset, index);252 set_register(pegasus, EpromCtrl, EPROM_READ);253 254 for (i = 0; i < REG_TIMEOUT; i++) {255 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);256 if (ret < 0)257 goto fail;258 if (tmp & EPROM_DONE)259 break;260 }261 if (i >= REG_TIMEOUT) {262 ret = -ETIMEDOUT;263 goto fail;264 }265 266 ret = get_registers(pegasus, EpromData, 2, &retdatai);267 if (ret < 0)268 goto fail;269 *retdata = le16_to_cpu(retdatai);270 return ret;271 272fail:273 netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);274 return ret;275}276 277#ifdef PEGASUS_WRITE_EEPROM278static inline void enable_eprom_write(pegasus_t *pegasus)279{280 __u8 tmp;281 282 get_registers(pegasus, EthCtrl2, 1, &tmp);283 set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);284}285 286static inline void disable_eprom_write(pegasus_t *pegasus)287{288 __u8 tmp;289 290 get_registers(pegasus, EthCtrl2, 1, &tmp);291 set_register(pegasus, EpromCtrl, 0);292 set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);293}294 295static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)296{297 int i;298 __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };299 int ret;300 __le16 le_data = cpu_to_le16(data);301 302 set_registers(pegasus, EpromOffset, 4, d);303 enable_eprom_write(pegasus);304 set_register(pegasus, EpromOffset, index);305 set_registers(pegasus, EpromData, 2, &le_data);306 set_register(pegasus, EpromCtrl, EPROM_WRITE);307 308 for (i = 0; i < REG_TIMEOUT; i++) {309 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);310 if (ret == -ESHUTDOWN)311 goto fail;312 if (tmp & EPROM_DONE)313 break;314 }315 disable_eprom_write(pegasus);316 if (i >= REG_TIMEOUT)317 goto fail;318 319 return ret;320 321fail:322 netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);323 return -ETIMEDOUT;324}325#endif /* PEGASUS_WRITE_EEPROM */326 327static inline int get_node_id(pegasus_t *pegasus, u8 *id)328{329 int i, ret;330 u16 w16;331 332 for (i = 0; i < 3; i++) {333 ret = read_eprom_word(pegasus, i, &w16);334 if (ret < 0)335 return ret;336 ((__le16 *) id)[i] = cpu_to_le16(w16);337 }338 339 return 0;340}341 342static void set_ethernet_addr(pegasus_t *pegasus)343{344 int ret;345 u8 node_id[6];346 347 if (pegasus->features & PEGASUS_II) {348 ret = get_registers(pegasus, 0x10, sizeof(node_id), node_id);349 if (ret < 0)350 goto err;351 } else {352 ret = get_node_id(pegasus, node_id);353 if (ret < 0)354 goto err;355 ret = set_registers(pegasus, EthID, sizeof(node_id), node_id);356 if (ret < 0)357 goto err;358 }359 360 eth_hw_addr_set(pegasus->net, node_id);361 362 return;363err:364 eth_hw_addr_random(pegasus->net);365 netif_dbg(pegasus, drv, pegasus->net, "software assigned MAC address.\n");366 367 return;368}369 370static inline int reset_mac(pegasus_t *pegasus)371{372 int ret, i;373 __u8 data = 0x8;374 375 set_register(pegasus, EthCtrl1, data);376 for (i = 0; i < REG_TIMEOUT; i++) {377 ret = get_registers(pegasus, EthCtrl1, 1, &data);378 if (ret < 0)379 goto fail;380 if (~data & 0x08) {381 if (loopback)382 break;383 if (mii_mode && (pegasus->features & HAS_HOME_PNA))384 set_register(pegasus, Gpio1, 0x34);385 else386 set_register(pegasus, Gpio1, 0x26);387 set_register(pegasus, Gpio0, pegasus->features);388 set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);389 break;390 }391 }392 if (i == REG_TIMEOUT)393 return -ETIMEDOUT;394 395 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||396 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {397 set_register(pegasus, Gpio0, 0x24);398 set_register(pegasus, Gpio0, 0x26);399 }400 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {401 __u16 auxmode;402 ret = read_mii_word(pegasus, 3, 0x1b, &auxmode);403 if (ret < 0)404 goto fail;405 auxmode |= 4;406 write_mii_word(pegasus, 3, 0x1b, &auxmode);407 }408 409 return 0;410fail:411 netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);412 return ret;413}414 415static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)416{417 pegasus_t *pegasus = netdev_priv(dev);418 int ret;419 __u16 linkpart;420 __u8 data[4];421 422 ret = read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);423 if (ret < 0)424 goto fail;425 data[0] = 0xc8; /* TX & RX enable, append status, no CRC */426 data[1] = 0;427 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))428 data[1] |= 0x20; /* set full duplex */429 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))430 data[1] |= 0x10; /* set 100 Mbps */431 if (mii_mode)432 data[1] = 0;433 data[2] = loopback ? 0x09 : 0x01;434 435 memcpy(pegasus->eth_regs, data, sizeof(data));436 ret = set_registers(pegasus, EthCtrl0, 3, data);437 438 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||439 usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||440 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {441 u16 auxmode;442 ret = read_mii_word(pegasus, 0, 0x1b, &auxmode);443 if (ret < 0)444 goto fail;445 auxmode |= 4;446 write_mii_word(pegasus, 0, 0x1b, &auxmode);447 }448 449 return ret;450fail:451 netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);452 return ret;453}454 455static void read_bulk_callback(struct urb *urb)456{457 pegasus_t *pegasus = urb->context;458 struct net_device *net;459 u8 *buf = urb->transfer_buffer;460 int rx_status, count = urb->actual_length;461 int status = urb->status;462 __u16 pkt_len;463 464 if (!pegasus)465 return;466 467 net = pegasus->net;468 if (!netif_device_present(net) || !netif_running(net))469 return;470 471 switch (status) {472 case 0:473 break;474 case -ETIME:475 netif_dbg(pegasus, rx_err, net, "reset MAC\n");476 pegasus->flags &= ~PEGASUS_RX_BUSY;477 break;478 case -EPIPE: /* stall, or disconnect from TT */479 /* FIXME schedule work to clear the halt */480 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");481 return;482 case -ENOENT:483 case -ECONNRESET:484 case -ESHUTDOWN:485 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);486 return;487 default:488 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);489 goto goon;490 }491 492 if (count < 4)493 goto goon;494 495 rx_status = buf[count - 2];496 if (rx_status & 0x1c) {497 netif_dbg(pegasus, rx_err, net,498 "RX packet error %x\n", rx_status);499 net->stats.rx_errors++;500 if (rx_status & 0x04) /* runt */501 net->stats.rx_length_errors++;502 if (rx_status & 0x08)503 net->stats.rx_crc_errors++;504 if (rx_status & 0x10) /* extra bits */505 net->stats.rx_frame_errors++;506 goto goon;507 }508 if (pegasus->chip == 0x8513) {509 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);510 pkt_len &= 0x0fff;511 pegasus->rx_skb->data += 2;512 } else {513 pkt_len = buf[count - 3] << 8;514 pkt_len += buf[count - 4];515 pkt_len &= 0xfff;516 pkt_len -= 4;517 }518 519 /*520 * If the packet is unreasonably long, quietly drop it rather than521 * kernel panicing by calling skb_put.522 */523 if (pkt_len > PEGASUS_MTU)524 goto goon;525 526 /*527 * at this point we are sure pegasus->rx_skb != NULL528 * so we go ahead and pass up the packet.529 */530 skb_put(pegasus->rx_skb, pkt_len);531 pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);532 netif_rx(pegasus->rx_skb);533 net->stats.rx_packets++;534 net->stats.rx_bytes += pkt_len;535 536 if (pegasus->flags & PEGASUS_UNPLUG)537 return;538 539 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,540 GFP_ATOMIC);541 542 if (pegasus->rx_skb == NULL)543 goto tl_sched;544goon:545 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,546 usb_rcvbulkpipe(pegasus->usb, 1),547 pegasus->rx_skb->data, PEGASUS_MTU,548 read_bulk_callback, pegasus);549 rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);550 if (rx_status == -ENODEV)551 netif_device_detach(pegasus->net);552 else if (rx_status) {553 pegasus->flags |= PEGASUS_RX_URB_FAIL;554 goto tl_sched;555 } else {556 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;557 }558 559 return;560 561tl_sched:562 tasklet_schedule(&pegasus->rx_tl);563}564 565static void rx_fixup(struct tasklet_struct *t)566{567 pegasus_t *pegasus = from_tasklet(pegasus, t, rx_tl);568 int status;569 570 if (pegasus->flags & PEGASUS_UNPLUG)571 return;572 573 if (pegasus->flags & PEGASUS_RX_URB_FAIL)574 if (pegasus->rx_skb)575 goto try_again;576 if (pegasus->rx_skb == NULL)577 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,578 PEGASUS_MTU,579 GFP_ATOMIC);580 if (pegasus->rx_skb == NULL) {581 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");582 tasklet_schedule(&pegasus->rx_tl);583 return;584 }585 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,586 usb_rcvbulkpipe(pegasus->usb, 1),587 pegasus->rx_skb->data, PEGASUS_MTU,588 read_bulk_callback, pegasus);589try_again:590 status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);591 if (status == -ENODEV)592 netif_device_detach(pegasus->net);593 else if (status) {594 pegasus->flags |= PEGASUS_RX_URB_FAIL;595 tasklet_schedule(&pegasus->rx_tl);596 } else {597 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;598 }599}600 601static void write_bulk_callback(struct urb *urb)602{603 pegasus_t *pegasus = urb->context;604 struct net_device *net;605 int status = urb->status;606 607 if (!pegasus)608 return;609 610 net = pegasus->net;611 612 if (!netif_device_present(net) || !netif_running(net))613 return;614 615 switch (status) {616 case -EPIPE:617 /* FIXME schedule_work() to clear the tx halt */618 netif_stop_queue(net);619 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");620 return;621 case -ENOENT:622 case -ECONNRESET:623 case -ESHUTDOWN:624 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);625 return;626 default:627 netif_info(pegasus, tx_err, net, "TX status %d\n", status);628 fallthrough;629 case 0:630 break;631 }632 633 netif_trans_update(net); /* prevent tx timeout */634 netif_wake_queue(net);635}636 637static void intr_callback(struct urb *urb)638{639 pegasus_t *pegasus = urb->context;640 struct net_device *net;641 int res, status = urb->status;642 643 if (!pegasus)644 return;645 net = pegasus->net;646 647 switch (status) {648 case 0:649 break;650 case -ECONNRESET: /* unlink */651 case -ENOENT:652 case -ESHUTDOWN:653 return;654 default:655 /* some Pegasus-I products report LOTS of data656 * toggle errors... avoid log spamming657 */658 netif_dbg(pegasus, timer, net, "intr status %d\n", status);659 }660 661 if (urb->actual_length >= 6) {662 u8 *d = urb->transfer_buffer;663 664 /* byte 0 == tx_status1, reg 2B */665 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL666 |LATE_COL|JABBER_TIMEOUT)) {667 net->stats.tx_errors++;668 if (d[0] & TX_UNDERRUN)669 net->stats.tx_fifo_errors++;670 if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))671 net->stats.tx_aborted_errors++;672 if (d[0] & LATE_COL)673 net->stats.tx_window_errors++;674 }675 676 /* d[5].LINK_STATUS lies on some adapters.677 * d[0].NO_CARRIER kicks in only with failed TX.678 * ... so monitoring with MII may be safest.679 */680 681 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */682 net->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];683 }684 685 res = usb_submit_urb(urb, GFP_ATOMIC);686 if (res == -ENODEV)687 netif_device_detach(pegasus->net);688 if (res)689 netif_err(pegasus, timer, net,690 "can't resubmit interrupt urb, %d\n", res);691}692 693static void pegasus_tx_timeout(struct net_device *net, unsigned int txqueue)694{695 pegasus_t *pegasus = netdev_priv(net);696 netif_warn(pegasus, timer, net, "tx timeout\n");697 usb_unlink_urb(pegasus->tx_urb);698 net->stats.tx_errors++;699}700 701static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,702 struct net_device *net)703{704 pegasus_t *pegasus = netdev_priv(net);705 int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;706 int res;707 __u16 l16 = skb->len;708 709 netif_stop_queue(net);710 711 ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);712 skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);713 usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,714 usb_sndbulkpipe(pegasus->usb, 2),715 pegasus->tx_buff, count,716 write_bulk_callback, pegasus);717 if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {718 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);719 switch (res) {720 case -EPIPE: /* stall, or disconnect from TT */721 /* cleanup should already have been scheduled */722 break;723 case -ENODEV: /* disconnect() upcoming */724 case -EPERM:725 netif_device_detach(pegasus->net);726 break;727 default:728 net->stats.tx_errors++;729 netif_start_queue(net);730 }731 } else {732 net->stats.tx_packets++;733 net->stats.tx_bytes += skb->len;734 }735 dev_kfree_skb(skb);736 737 return NETDEV_TX_OK;738}739 740static inline void disable_net_traffic(pegasus_t *pegasus)741{742 __le16 tmp = cpu_to_le16(0);743 744 set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);745}746 747static inline int get_interrupt_interval(pegasus_t *pegasus)748{749 u16 data;750 u8 interval;751 int ret;752 753 ret = read_eprom_word(pegasus, 4, &data);754 if (ret < 0)755 return ret;756 757 interval = data >> 8;758 if (pegasus->usb->speed != USB_SPEED_HIGH) {759 if (interval < 0x80) {760 netif_info(pegasus, timer, pegasus->net,761 "intr interval changed from %ums to %ums\n",762 interval, 0x80);763 interval = 0x80;764 data = (data & 0x00FF) | ((u16)interval << 8);765#ifdef PEGASUS_WRITE_EEPROM766 write_eprom_word(pegasus, 4, data);767#endif768 }769 }770 pegasus->intr_interval = interval;771 772 return 0;773}774 775static void set_carrier(struct net_device *net)776{777 pegasus_t *pegasus = netdev_priv(net);778 u16 tmp;779 780 if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))781 return;782 783 if (tmp & BMSR_LSTATUS)784 netif_carrier_on(net);785 else786 netif_carrier_off(net);787}788 789static void free_all_urbs(pegasus_t *pegasus)790{791 usb_free_urb(pegasus->intr_urb);792 usb_free_urb(pegasus->tx_urb);793 usb_free_urb(pegasus->rx_urb);794}795 796static void unlink_all_urbs(pegasus_t *pegasus)797{798 usb_kill_urb(pegasus->intr_urb);799 usb_kill_urb(pegasus->tx_urb);800 usb_kill_urb(pegasus->rx_urb);801}802 803static int alloc_urbs(pegasus_t *pegasus)804{805 int res = -ENOMEM;806 807 pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);808 if (!pegasus->rx_urb) {809 return res;810 }811 pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);812 if (!pegasus->tx_urb) {813 usb_free_urb(pegasus->rx_urb);814 return res;815 }816 pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);817 if (!pegasus->intr_urb) {818 usb_free_urb(pegasus->tx_urb);819 usb_free_urb(pegasus->rx_urb);820 return res;821 }822 823 return 0;824}825 826static int pegasus_open(struct net_device *net)827{828 pegasus_t *pegasus = netdev_priv(net);829 int res=-ENOMEM;830 831 if (pegasus->rx_skb == NULL)832 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,833 PEGASUS_MTU,834 GFP_KERNEL);835 if (!pegasus->rx_skb)836 goto exit;837 838 set_registers(pegasus, EthID, 6, net->dev_addr);839 840 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,841 usb_rcvbulkpipe(pegasus->usb, 1),842 pegasus->rx_skb->data, PEGASUS_MTU,843 read_bulk_callback, pegasus);844 if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {845 if (res == -ENODEV)846 netif_device_detach(pegasus->net);847 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);848 goto exit;849 }850 851 usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,852 usb_rcvintpipe(pegasus->usb, 3),853 pegasus->intr_buff, sizeof(pegasus->intr_buff),854 intr_callback, pegasus, pegasus->intr_interval);855 if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {856 if (res == -ENODEV)857 netif_device_detach(pegasus->net);858 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);859 usb_kill_urb(pegasus->rx_urb);860 goto exit;861 }862 res = enable_net_traffic(net, pegasus->usb);863 if (res < 0) {864 netif_dbg(pegasus, ifup, net,865 "can't enable_net_traffic() - %d\n", res);866 res = -EIO;867 usb_kill_urb(pegasus->rx_urb);868 usb_kill_urb(pegasus->intr_urb);869 goto exit;870 }871 set_carrier(net);872 netif_start_queue(net);873 netif_dbg(pegasus, ifup, net, "open\n");874 res = 0;875exit:876 return res;877}878 879static int pegasus_close(struct net_device *net)880{881 pegasus_t *pegasus = netdev_priv(net);882 883 netif_stop_queue(net);884 if (!(pegasus->flags & PEGASUS_UNPLUG))885 disable_net_traffic(pegasus);886 tasklet_kill(&pegasus->rx_tl);887 unlink_all_urbs(pegasus);888 889 return 0;890}891 892static void pegasus_get_drvinfo(struct net_device *dev,893 struct ethtool_drvinfo *info)894{895 pegasus_t *pegasus = netdev_priv(dev);896 897 strscpy(info->driver, driver_name, sizeof(info->driver));898 usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));899}900 901/* also handles three patterns of some kind in hardware */902#define WOL_SUPPORTED (WAKE_MAGIC|WAKE_PHY)903 904static void905pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)906{907 pegasus_t *pegasus = netdev_priv(dev);908 909 wol->supported = WAKE_MAGIC | WAKE_PHY;910 wol->wolopts = pegasus->wolopts;911}912 913static int914pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)915{916 pegasus_t *pegasus = netdev_priv(dev);917 u8 reg78 = 0x04;918 int ret;919 920 if (wol->wolopts & ~WOL_SUPPORTED)921 return -EINVAL;922 923 if (wol->wolopts & WAKE_MAGIC)924 reg78 |= 0x80;925 if (wol->wolopts & WAKE_PHY)926 reg78 |= 0x40;927 /* FIXME this 0x10 bit still needs to get set in the chip... */928 if (wol->wolopts)929 pegasus->eth_regs[0] |= 0x10;930 else931 pegasus->eth_regs[0] &= ~0x10;932 pegasus->wolopts = wol->wolopts;933 934 ret = set_register(pegasus, WakeupControl, reg78);935 if (!ret)936 ret = device_set_wakeup_enable(&pegasus->usb->dev,937 wol->wolopts);938 return ret;939}940 941static inline void pegasus_reset_wol(struct net_device *dev)942{943 struct ethtool_wolinfo wol;944 945 memset(&wol, 0, sizeof wol);946 (void) pegasus_set_wol(dev, &wol);947}948 949static int950pegasus_get_link_ksettings(struct net_device *dev,951 struct ethtool_link_ksettings *ecmd)952{953 pegasus_t *pegasus;954 955 pegasus = netdev_priv(dev);956 mii_ethtool_get_link_ksettings(&pegasus->mii, ecmd);957 return 0;958}959 960static int961pegasus_set_link_ksettings(struct net_device *dev,962 const struct ethtool_link_ksettings *ecmd)963{964 pegasus_t *pegasus = netdev_priv(dev);965 return mii_ethtool_set_link_ksettings(&pegasus->mii, ecmd);966}967 968static int pegasus_nway_reset(struct net_device *dev)969{970 pegasus_t *pegasus = netdev_priv(dev);971 return mii_nway_restart(&pegasus->mii);972}973 974static u32 pegasus_get_link(struct net_device *dev)975{976 pegasus_t *pegasus = netdev_priv(dev);977 return mii_link_ok(&pegasus->mii);978}979 980static u32 pegasus_get_msglevel(struct net_device *dev)981{982 pegasus_t *pegasus = netdev_priv(dev);983 return pegasus->msg_enable;984}985 986static void pegasus_set_msglevel(struct net_device *dev, u32 v)987{988 pegasus_t *pegasus = netdev_priv(dev);989 pegasus->msg_enable = v;990}991 992static const struct ethtool_ops ops = {993 .get_drvinfo = pegasus_get_drvinfo,994 .nway_reset = pegasus_nway_reset,995 .get_link = pegasus_get_link,996 .get_msglevel = pegasus_get_msglevel,997 .set_msglevel = pegasus_set_msglevel,998 .get_wol = pegasus_get_wol,999 .set_wol = pegasus_set_wol,1000 .get_link_ksettings = pegasus_get_link_ksettings,1001 .set_link_ksettings = pegasus_set_link_ksettings,1002};1003 1004static 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 1030static 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 1048static __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 else1060 return i;1061 }1062fail:1063 return 0xff;1064}1065 1066static 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 else1077 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 else1087 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 else1096 set_register(pegasus, Reg81, 2);1097 1098 return;1099fail:1100 netif_dbg(pegasus, drv, pegasus->net, "%s failed\n", __func__);1101}1102 1103static 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 1113static 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 Bluetooth1118 * 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 1129static 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_DRV1172 | 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 1206out3:1207 usb_set_intfdata(intf, NULL);1208out2:1209 free_all_urbs(pegasus);1210out1:1211 free_netdev(net);1212out:1213 return res;1214}1215 1216static 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 1238static 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 1251static 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 1270static 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 1281static 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 1291static 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 1322static 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 1330static void __exit pegasus_exit(void)1331{1332 usb_deregister(&pegasus_driver);1333}1334 1335module_init(pegasus_init);1336module_exit(pegasus_exit);1337