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1// SPDX-License-Identifier: GPL-2.0-or-later2 /***************************************************************************3 *4 * Copyright (C) 2007-2010 SMSC5 *6 *****************************************************************************/7 8#include <linux/module.h>9#include <linux/kmod.h>10#include <linux/netdevice.h>11#include <linux/etherdevice.h>12#include <linux/ethtool.h>13#include <linux/mii.h>14#include <linux/usb.h>15#include <linux/bitrev.h>16#include <linux/crc16.h>17#include <linux/crc32.h>18#include <linux/usb/usbnet.h>19#include <linux/slab.h>20#include <linux/of_net.h>21#include "smsc75xx.h"22 23#define SMSC_CHIPNAME "smsc75xx"24#define SMSC_DRIVER_VERSION "1.0.0"25#define HS_USB_PKT_SIZE (512)26#define FS_USB_PKT_SIZE (64)27#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)28#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)29#define DEFAULT_BULK_IN_DELAY (0x00002000)30#define MAX_SINGLE_PACKET_SIZE (9000)31#define LAN75XX_EEPROM_MAGIC (0x7500)32#define EEPROM_MAC_OFFSET (0x01)33#define DEFAULT_TX_CSUM_ENABLE (true)34#define DEFAULT_RX_CSUM_ENABLE (true)35#define SMSC75XX_INTERNAL_PHY_ID (1)36#define SMSC75XX_TX_OVERHEAD (8)37#define MAX_RX_FIFO_SIZE (20 * 1024)38#define MAX_TX_FIFO_SIZE (12 * 1024)39#define USB_VENDOR_ID_SMSC (0x0424)40#define USB_PRODUCT_ID_LAN7500 (0x7500)41#define USB_PRODUCT_ID_LAN7505 (0x7505)42#define RXW_PADDING 243#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \44 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)45 46#define SUSPEND_SUSPEND0 (0x01)47#define SUSPEND_SUSPEND1 (0x02)48#define SUSPEND_SUSPEND2 (0x04)49#define SUSPEND_SUSPEND3 (0x08)50#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \51 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)52 53struct smsc75xx_priv {54 struct usbnet *dev;55 u32 rfe_ctl;56 u32 wolopts;57 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];58 struct mutex dataport_mutex;59 spinlock_t rfe_ctl_lock;60 struct work_struct set_multicast;61 u8 suspend_flags;62};63 64static bool turbo_mode = true;65module_param(turbo_mode, bool, 0644);66MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");67 68static int smsc75xx_link_ok_nopm(struct usbnet *dev);69static int smsc75xx_phy_gig_workaround(struct usbnet *dev);70 71static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,72 u32 *data, int in_pm)73{74 u32 buf;75 int ret;76 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);77 78 BUG_ON(!dev);79 80 if (!in_pm)81 fn = usbnet_read_cmd;82 else83 fn = usbnet_read_cmd_nopm;84 85 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN86 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,87 0, index, &buf, 4);88 if (unlikely(ret < 4)) {89 ret = ret < 0 ? ret : -ENODATA;90 91 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",92 index, ret);93 return ret;94 }95 96 le32_to_cpus(&buf);97 *data = buf;98 99 return ret;100}101 102static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,103 u32 data, int in_pm)104{105 u32 buf;106 int ret;107 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);108 109 BUG_ON(!dev);110 111 if (!in_pm)112 fn = usbnet_write_cmd;113 else114 fn = usbnet_write_cmd_nopm;115 116 buf = data;117 cpu_to_le32s(&buf);118 119 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT120 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,121 0, index, &buf, 4);122 if (unlikely(ret < 0))123 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",124 index, ret);125 126 return ret;127}128 129static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,130 u32 *data)131{132 return __smsc75xx_read_reg(dev, index, data, 1);133}134 135static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,136 u32 data)137{138 return __smsc75xx_write_reg(dev, index, data, 1);139}140 141static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,142 u32 *data)143{144 return __smsc75xx_read_reg(dev, index, data, 0);145}146 147static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,148 u32 data)149{150 return __smsc75xx_write_reg(dev, index, data, 0);151}152 153/* Loop until the read is completed with timeout154 * called with phy_mutex held */155static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,156 int in_pm)157{158 unsigned long start_time = jiffies;159 u32 val;160 int ret;161 162 do {163 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);164 if (ret < 0) {165 netdev_warn(dev->net, "Error reading MII_ACCESS\n");166 return ret;167 }168 169 if (!(val & MII_ACCESS_BUSY))170 return 0;171 } while (!time_after(jiffies, start_time + HZ));172 173 return -EIO;174}175 176static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,177 int in_pm)178{179 struct usbnet *dev = netdev_priv(netdev);180 u32 val, addr;181 int ret;182 183 mutex_lock(&dev->phy_mutex);184 185 /* confirm MII not busy */186 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);187 if (ret < 0) {188 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");189 goto done;190 }191 192 /* set the address, index & direction (read from PHY) */193 phy_id &= dev->mii.phy_id_mask;194 idx &= dev->mii.reg_num_mask;195 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)196 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)197 | MII_ACCESS_READ | MII_ACCESS_BUSY;198 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);199 if (ret < 0) {200 netdev_warn(dev->net, "Error writing MII_ACCESS\n");201 goto done;202 }203 204 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);205 if (ret < 0) {206 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);207 goto done;208 }209 210 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);211 if (ret < 0) {212 netdev_warn(dev->net, "Error reading MII_DATA\n");213 goto done;214 }215 216 ret = (u16)(val & 0xFFFF);217 218done:219 mutex_unlock(&dev->phy_mutex);220 return ret;221}222 223static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,224 int idx, int regval, int in_pm)225{226 struct usbnet *dev = netdev_priv(netdev);227 u32 val, addr;228 int ret;229 230 mutex_lock(&dev->phy_mutex);231 232 /* confirm MII not busy */233 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);234 if (ret < 0) {235 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");236 goto done;237 }238 239 val = regval;240 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);241 if (ret < 0) {242 netdev_warn(dev->net, "Error writing MII_DATA\n");243 goto done;244 }245 246 /* set the address, index & direction (write to PHY) */247 phy_id &= dev->mii.phy_id_mask;248 idx &= dev->mii.reg_num_mask;249 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)250 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)251 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;252 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);253 if (ret < 0) {254 netdev_warn(dev->net, "Error writing MII_ACCESS\n");255 goto done;256 }257 258 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);259 if (ret < 0) {260 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);261 goto done;262 }263 264done:265 mutex_unlock(&dev->phy_mutex);266}267 268static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,269 int idx)270{271 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);272}273 274static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,275 int idx, int regval)276{277 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);278}279 280static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)281{282 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);283}284 285static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,286 int regval)287{288 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);289}290 291static int smsc75xx_wait_eeprom(struct usbnet *dev)292{293 unsigned long start_time = jiffies;294 u32 val;295 int ret;296 297 do {298 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);299 if (ret < 0) {300 netdev_warn(dev->net, "Error reading E2P_CMD\n");301 return ret;302 }303 304 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))305 break;306 udelay(40);307 } while (!time_after(jiffies, start_time + HZ));308 309 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {310 netdev_warn(dev->net, "EEPROM read operation timeout\n");311 return -EIO;312 }313 314 return 0;315}316 317static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)318{319 unsigned long start_time = jiffies;320 u32 val;321 int ret;322 323 do {324 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);325 if (ret < 0) {326 netdev_warn(dev->net, "Error reading E2P_CMD\n");327 return ret;328 }329 330 if (!(val & E2P_CMD_BUSY))331 return 0;332 333 udelay(40);334 } while (!time_after(jiffies, start_time + HZ));335 336 netdev_warn(dev->net, "EEPROM is busy\n");337 return -EIO;338}339 340static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,341 u8 *data)342{343 u32 val;344 int i, ret;345 346 BUG_ON(!dev);347 BUG_ON(!data);348 349 ret = smsc75xx_eeprom_confirm_not_busy(dev);350 if (ret)351 return ret;352 353 for (i = 0; i < length; i++) {354 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);355 ret = smsc75xx_write_reg(dev, E2P_CMD, val);356 if (ret < 0) {357 netdev_warn(dev->net, "Error writing E2P_CMD\n");358 return ret;359 }360 361 ret = smsc75xx_wait_eeprom(dev);362 if (ret < 0)363 return ret;364 365 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);366 if (ret < 0) {367 netdev_warn(dev->net, "Error reading E2P_DATA\n");368 return ret;369 }370 371 data[i] = val & 0xFF;372 offset++;373 }374 375 return 0;376}377 378static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,379 u8 *data)380{381 u32 val;382 int i, ret;383 384 BUG_ON(!dev);385 BUG_ON(!data);386 387 ret = smsc75xx_eeprom_confirm_not_busy(dev);388 if (ret)389 return ret;390 391 /* Issue write/erase enable command */392 val = E2P_CMD_BUSY | E2P_CMD_EWEN;393 ret = smsc75xx_write_reg(dev, E2P_CMD, val);394 if (ret < 0) {395 netdev_warn(dev->net, "Error writing E2P_CMD\n");396 return ret;397 }398 399 ret = smsc75xx_wait_eeprom(dev);400 if (ret < 0)401 return ret;402 403 for (i = 0; i < length; i++) {404 405 /* Fill data register */406 val = data[i];407 ret = smsc75xx_write_reg(dev, E2P_DATA, val);408 if (ret < 0) {409 netdev_warn(dev->net, "Error writing E2P_DATA\n");410 return ret;411 }412 413 /* Send "write" command */414 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);415 ret = smsc75xx_write_reg(dev, E2P_CMD, val);416 if (ret < 0) {417 netdev_warn(dev->net, "Error writing E2P_CMD\n");418 return ret;419 }420 421 ret = smsc75xx_wait_eeprom(dev);422 if (ret < 0)423 return ret;424 425 offset++;426 }427 428 return 0;429}430 431static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)432{433 int i, ret;434 435 for (i = 0; i < 100; i++) {436 u32 dp_sel;437 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);438 if (ret < 0) {439 netdev_warn(dev->net, "Error reading DP_SEL\n");440 return ret;441 }442 443 if (dp_sel & DP_SEL_DPRDY)444 return 0;445 446 udelay(40);447 }448 449 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");450 451 return -EIO;452}453 454static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,455 u32 length, u32 *buf)456{457 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);458 u32 dp_sel;459 int i, ret;460 461 mutex_lock(&pdata->dataport_mutex);462 463 ret = smsc75xx_dataport_wait_not_busy(dev);464 if (ret < 0) {465 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");466 goto done;467 }468 469 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);470 if (ret < 0) {471 netdev_warn(dev->net, "Error reading DP_SEL\n");472 goto done;473 }474 475 dp_sel &= ~DP_SEL_RSEL;476 dp_sel |= ram_select;477 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);478 if (ret < 0) {479 netdev_warn(dev->net, "Error writing DP_SEL\n");480 goto done;481 }482 483 for (i = 0; i < length; i++) {484 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);485 if (ret < 0) {486 netdev_warn(dev->net, "Error writing DP_ADDR\n");487 goto done;488 }489 490 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);491 if (ret < 0) {492 netdev_warn(dev->net, "Error writing DP_DATA\n");493 goto done;494 }495 496 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);497 if (ret < 0) {498 netdev_warn(dev->net, "Error writing DP_CMD\n");499 goto done;500 }501 502 ret = smsc75xx_dataport_wait_not_busy(dev);503 if (ret < 0) {504 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");505 goto done;506 }507 }508 509done:510 mutex_unlock(&pdata->dataport_mutex);511 return ret;512}513 514/* returns hash bit number for given MAC address */515static u32 smsc75xx_hash(char addr[ETH_ALEN])516{517 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;518}519 520static void smsc75xx_deferred_multicast_write(struct work_struct *param)521{522 struct smsc75xx_priv *pdata =523 container_of(param, struct smsc75xx_priv, set_multicast);524 struct usbnet *dev = pdata->dev;525 int ret;526 527 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",528 pdata->rfe_ctl);529 530 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,531 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);532 533 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);534 if (ret < 0)535 netdev_warn(dev->net, "Error writing RFE_CRL\n");536}537 538static void smsc75xx_set_multicast(struct net_device *netdev)539{540 struct usbnet *dev = netdev_priv(netdev);541 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);542 unsigned long flags;543 int i;544 545 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);546 547 pdata->rfe_ctl &=548 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);549 pdata->rfe_ctl |= RFE_CTL_AB;550 551 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)552 pdata->multicast_hash_table[i] = 0;553 554 if (dev->net->flags & IFF_PROMISC) {555 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");556 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;557 } else if (dev->net->flags & IFF_ALLMULTI) {558 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");559 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;560 } else if (!netdev_mc_empty(dev->net)) {561 struct netdev_hw_addr *ha;562 563 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");564 565 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;566 567 netdev_for_each_mc_addr(ha, netdev) {568 u32 bitnum = smsc75xx_hash(ha->addr);569 pdata->multicast_hash_table[bitnum / 32] |=570 (1 << (bitnum % 32));571 }572 } else {573 netif_dbg(dev, drv, dev->net, "receive own packets only\n");574 pdata->rfe_ctl |= RFE_CTL_DPF;575 }576 577 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);578 579 /* defer register writes to a sleepable context */580 schedule_work(&pdata->set_multicast);581}582 583static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,584 u16 lcladv, u16 rmtadv)585{586 u32 flow = 0, fct_flow = 0;587 int ret;588 589 if (duplex == DUPLEX_FULL) {590 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);591 592 if (cap & FLOW_CTRL_TX) {593 flow = (FLOW_TX_FCEN | 0xFFFF);594 /* set fct_flow thresholds to 20% and 80% */595 fct_flow = (8 << 8) | 32;596 }597 598 if (cap & FLOW_CTRL_RX)599 flow |= FLOW_RX_FCEN;600 601 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",602 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),603 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));604 } else {605 netif_dbg(dev, link, dev->net, "half duplex\n");606 }607 608 ret = smsc75xx_write_reg(dev, FLOW, flow);609 if (ret < 0) {610 netdev_warn(dev->net, "Error writing FLOW\n");611 return ret;612 }613 614 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);615 if (ret < 0) {616 netdev_warn(dev->net, "Error writing FCT_FLOW\n");617 return ret;618 }619 620 return 0;621}622 623static int smsc75xx_link_reset(struct usbnet *dev)624{625 struct mii_if_info *mii = &dev->mii;626 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };627 u16 lcladv, rmtadv;628 int ret;629 630 /* write to clear phy interrupt status */631 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,632 PHY_INT_SRC_CLEAR_ALL);633 634 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);635 if (ret < 0) {636 netdev_warn(dev->net, "Error writing INT_STS\n");637 return ret;638 }639 640 mii_check_media(mii, 1, 1);641 mii_ethtool_gset(&dev->mii, &ecmd);642 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);643 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);644 645 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",646 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);647 648 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);649}650 651static void smsc75xx_status(struct usbnet *dev, struct urb *urb)652{653 u32 intdata;654 655 if (urb->actual_length != 4) {656 netdev_warn(dev->net, "unexpected urb length %d\n",657 urb->actual_length);658 return;659 }660 661 intdata = get_unaligned_le32(urb->transfer_buffer);662 663 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);664 665 if (intdata & INT_ENP_PHY_INT)666 usbnet_defer_kevent(dev, EVENT_LINK_RESET);667 else668 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",669 intdata);670}671 672static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)673{674 return MAX_EEPROM_SIZE;675}676 677static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,678 struct ethtool_eeprom *ee, u8 *data)679{680 struct usbnet *dev = netdev_priv(netdev);681 682 ee->magic = LAN75XX_EEPROM_MAGIC;683 684 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);685}686 687static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,688 struct ethtool_eeprom *ee, u8 *data)689{690 struct usbnet *dev = netdev_priv(netdev);691 692 if (ee->magic != LAN75XX_EEPROM_MAGIC) {693 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",694 ee->magic);695 return -EINVAL;696 }697 698 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);699}700 701static void smsc75xx_ethtool_get_wol(struct net_device *net,702 struct ethtool_wolinfo *wolinfo)703{704 struct usbnet *dev = netdev_priv(net);705 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);706 707 wolinfo->supported = SUPPORTED_WAKE;708 wolinfo->wolopts = pdata->wolopts;709}710 711static int smsc75xx_ethtool_set_wol(struct net_device *net,712 struct ethtool_wolinfo *wolinfo)713{714 struct usbnet *dev = netdev_priv(net);715 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);716 int ret;717 718 if (wolinfo->wolopts & ~SUPPORTED_WAKE)719 return -EINVAL;720 721 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;722 723 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);724 if (ret < 0)725 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);726 727 return ret;728}729 730static const struct ethtool_ops smsc75xx_ethtool_ops = {731 .get_link = usbnet_get_link,732 .nway_reset = usbnet_nway_reset,733 .get_drvinfo = usbnet_get_drvinfo,734 .get_msglevel = usbnet_get_msglevel,735 .set_msglevel = usbnet_set_msglevel,736 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,737 .get_eeprom = smsc75xx_ethtool_get_eeprom,738 .set_eeprom = smsc75xx_ethtool_set_eeprom,739 .get_wol = smsc75xx_ethtool_get_wol,740 .set_wol = smsc75xx_ethtool_set_wol,741 .get_link_ksettings = usbnet_get_link_ksettings_mii,742 .set_link_ksettings = usbnet_set_link_ksettings_mii,743};744 745static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)746{747 struct usbnet *dev = netdev_priv(netdev);748 749 if (!netif_running(netdev))750 return -EINVAL;751 752 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);753}754 755static void smsc75xx_init_mac_address(struct usbnet *dev)756{757 u8 addr[ETH_ALEN];758 759 /* maybe the boot loader passed the MAC address in devicetree */760 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {761 if (is_valid_ether_addr(dev->net->dev_addr)) {762 /* device tree values are valid so use them */763 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");764 return;765 }766 }767 768 /* try reading mac address from EEPROM */769 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {770 eth_hw_addr_set(dev->net, addr);771 if (is_valid_ether_addr(dev->net->dev_addr)) {772 /* eeprom values are valid so use them */773 netif_dbg(dev, ifup, dev->net,774 "MAC address read from EEPROM\n");775 return;776 }777 }778 779 /* no useful static MAC address found. generate a random one */780 eth_hw_addr_random(dev->net);781 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");782}783 784static int smsc75xx_set_mac_address(struct usbnet *dev)785{786 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |787 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;788 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;789 790 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);791 if (ret < 0) {792 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);793 return ret;794 }795 796 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);797 if (ret < 0) {798 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);799 return ret;800 }801 802 addr_hi |= ADDR_FILTX_FB_VALID;803 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);804 if (ret < 0) {805 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);806 return ret;807 }808 809 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);810 if (ret < 0)811 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);812 813 return ret;814}815 816static int smsc75xx_phy_initialize(struct usbnet *dev)817{818 int bmcr, ret, timeout = 0;819 820 /* Initialize MII structure */821 dev->mii.dev = dev->net;822 dev->mii.mdio_read = smsc75xx_mdio_read;823 dev->mii.mdio_write = smsc75xx_mdio_write;824 dev->mii.phy_id_mask = 0x1f;825 dev->mii.reg_num_mask = 0x1f;826 dev->mii.supports_gmii = 1;827 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;828 829 /* reset phy and wait for reset to complete */830 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);831 832 do {833 msleep(10);834 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);835 if (bmcr < 0) {836 netdev_warn(dev->net, "Error reading MII_BMCR\n");837 return bmcr;838 }839 timeout++;840 } while ((bmcr & BMCR_RESET) && (timeout < 100));841 842 if (timeout >= 100) {843 netdev_warn(dev->net, "timeout on PHY Reset\n");844 return -EIO;845 }846 847 /* phy workaround for gig link */848 smsc75xx_phy_gig_workaround(dev);849 850 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,851 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |852 ADVERTISE_PAUSE_ASYM);853 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,854 ADVERTISE_1000FULL);855 856 /* read and write to clear phy interrupt status */857 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);858 if (ret < 0) {859 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");860 return ret;861 }862 863 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);864 865 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,866 PHY_INT_MASK_DEFAULT);867 mii_nway_restart(&dev->mii);868 869 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");870 return 0;871}872 873static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)874{875 int ret = 0;876 u32 buf;877 bool rxenabled;878 879 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);880 if (ret < 0) {881 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);882 return ret;883 }884 885 rxenabled = ((buf & MAC_RX_RXEN) != 0);886 887 if (rxenabled) {888 buf &= ~MAC_RX_RXEN;889 ret = smsc75xx_write_reg(dev, MAC_RX, buf);890 if (ret < 0) {891 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);892 return ret;893 }894 }895 896 /* add 4 to size for FCS */897 buf &= ~MAC_RX_MAX_SIZE;898 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);899 900 ret = smsc75xx_write_reg(dev, MAC_RX, buf);901 if (ret < 0) {902 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);903 return ret;904 }905 906 if (rxenabled) {907 buf |= MAC_RX_RXEN;908 ret = smsc75xx_write_reg(dev, MAC_RX, buf);909 if (ret < 0) {910 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);911 return ret;912 }913 }914 915 return 0;916}917 918static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)919{920 struct usbnet *dev = netdev_priv(netdev);921 int ret;922 923 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);924 if (ret < 0) {925 netdev_warn(dev->net, "Failed to set mac rx frame length\n");926 return ret;927 }928 929 return usbnet_change_mtu(netdev, new_mtu);930}931 932/* Enable or disable Rx checksum offload engine */933static int smsc75xx_set_features(struct net_device *netdev,934 netdev_features_t features)935{936 struct usbnet *dev = netdev_priv(netdev);937 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);938 unsigned long flags;939 int ret;940 941 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);942 943 if (features & NETIF_F_RXCSUM)944 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;945 else946 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);947 948 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);949 /* it's racing here! */950 951 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);952 if (ret < 0) {953 netdev_warn(dev->net, "Error writing RFE_CTL\n");954 return ret;955 }956 return 0;957}958 959static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)960{961 int timeout = 0;962 963 do {964 u32 buf;965 int ret;966 967 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);968 969 if (ret < 0) {970 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);971 return ret;972 }973 974 if (buf & PMT_CTL_DEV_RDY)975 return 0;976 977 msleep(10);978 timeout++;979 } while (timeout < 100);980 981 netdev_warn(dev->net, "timeout waiting for device ready\n");982 return -EIO;983}984 985static int smsc75xx_phy_gig_workaround(struct usbnet *dev)986{987 struct mii_if_info *mii = &dev->mii;988 int ret = 0, timeout = 0;989 u32 buf, link_up = 0;990 991 /* Set the phy in Gig loopback */992 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);993 994 /* Wait for the link up */995 do {996 link_up = smsc75xx_link_ok_nopm(dev);997 usleep_range(10000, 20000);998 timeout++;999 } while ((!link_up) && (timeout < 1000));1000 1001 if (timeout >= 1000) {1002 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");1003 return -EIO;1004 }1005 1006 /* phy reset */1007 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);1008 if (ret < 0) {1009 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);1010 return ret;1011 }1012 1013 buf |= PMT_CTL_PHY_RST;1014 1015 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);1016 if (ret < 0) {1017 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);1018 return ret;1019 }1020 1021 timeout = 0;1022 do {1023 usleep_range(10000, 20000);1024 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);1025 if (ret < 0) {1026 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",1027 ret);1028 return ret;1029 }1030 timeout++;1031 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));1032 1033 if (timeout >= 100) {1034 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");1035 return -EIO;1036 }1037 1038 return 0;1039}1040 1041static int smsc75xx_reset(struct usbnet *dev)1042{1043 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1044 u32 buf;1045 int ret = 0, timeout;1046 1047 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");1048 1049 ret = smsc75xx_wait_ready(dev, 0);1050 if (ret < 0) {1051 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");1052 return ret;1053 }1054 1055 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1056 if (ret < 0) {1057 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1058 return ret;1059 }1060 1061 buf |= HW_CFG_LRST;1062 1063 ret = smsc75xx_write_reg(dev, HW_CFG, buf);1064 if (ret < 0) {1065 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);1066 return ret;1067 }1068 1069 timeout = 0;1070 do {1071 msleep(10);1072 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1073 if (ret < 0) {1074 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1075 return ret;1076 }1077 timeout++;1078 } while ((buf & HW_CFG_LRST) && (timeout < 100));1079 1080 if (timeout >= 100) {1081 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");1082 return -EIO;1083 }1084 1085 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");1086 1087 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);1088 if (ret < 0) {1089 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);1090 return ret;1091 }1092 1093 buf |= PMT_CTL_PHY_RST;1094 1095 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);1096 if (ret < 0) {1097 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);1098 return ret;1099 }1100 1101 timeout = 0;1102 do {1103 msleep(10);1104 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);1105 if (ret < 0) {1106 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);1107 return ret;1108 }1109 timeout++;1110 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));1111 1112 if (timeout >= 100) {1113 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");1114 return -EIO;1115 }1116 1117 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");1118 1119 ret = smsc75xx_set_mac_address(dev);1120 if (ret < 0) {1121 netdev_warn(dev->net, "Failed to set mac address\n");1122 return ret;1123 }1124 1125 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",1126 dev->net->dev_addr);1127 1128 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1129 if (ret < 0) {1130 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1131 return ret;1132 }1133 1134 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",1135 buf);1136 1137 buf |= HW_CFG_BIR;1138 1139 ret = smsc75xx_write_reg(dev, HW_CFG, buf);1140 if (ret < 0) {1141 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);1142 return ret;1143 }1144 1145 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1146 if (ret < 0) {1147 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1148 return ret;1149 }1150 1151 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",1152 buf);1153 1154 if (!turbo_mode) {1155 buf = 0;1156 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;1157 } else if (dev->udev->speed == USB_SPEED_HIGH) {1158 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;1159 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;1160 } else {1161 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;1162 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;1163 }1164 1165 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",1166 (ulong)dev->rx_urb_size);1167 1168 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);1169 if (ret < 0) {1170 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);1171 return ret;1172 }1173 1174 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);1175 if (ret < 0) {1176 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);1177 return ret;1178 }1179 1180 netif_dbg(dev, ifup, dev->net,1181 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);1182 1183 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);1184 if (ret < 0) {1185 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);1186 return ret;1187 }1188 1189 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);1190 if (ret < 0) {1191 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);1192 return ret;1193 }1194 1195 netif_dbg(dev, ifup, dev->net,1196 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);1197 1198 if (turbo_mode) {1199 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1200 if (ret < 0) {1201 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1202 return ret;1203 }1204 1205 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);1206 1207 buf |= (HW_CFG_MEF | HW_CFG_BCE);1208 1209 ret = smsc75xx_write_reg(dev, HW_CFG, buf);1210 if (ret < 0) {1211 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);1212 return ret;1213 }1214 1215 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);1216 if (ret < 0) {1217 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);1218 return ret;1219 }1220 1221 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);1222 }1223 1224 /* set FIFO sizes */1225 buf = (MAX_RX_FIFO_SIZE - 512) / 512;1226 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);1227 if (ret < 0) {1228 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);1229 return ret;1230 }1231 1232 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);1233 1234 buf = (MAX_TX_FIFO_SIZE - 512) / 512;1235 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);1236 if (ret < 0) {1237 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);1238 return ret;1239 }1240 1241 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);1242 1243 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);1244 if (ret < 0) {1245 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);1246 return ret;1247 }1248 1249 ret = smsc75xx_read_reg(dev, ID_REV, &buf);1250 if (ret < 0) {1251 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);1252 return ret;1253 }1254 1255 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);1256 1257 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);1258 if (ret < 0) {1259 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);1260 return ret;1261 }1262 1263 /* only set default GPIO/LED settings if no EEPROM is detected */1264 if (!(buf & E2P_CMD_LOADED)) {1265 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);1266 if (ret < 0) {1267 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);1268 return ret;1269 }1270 1271 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);1272 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;1273 1274 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);1275 if (ret < 0) {1276 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);1277 return ret;1278 }1279 }1280 1281 ret = smsc75xx_write_reg(dev, FLOW, 0);1282 if (ret < 0) {1283 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);1284 return ret;1285 }1286 1287 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);1288 if (ret < 0) {1289 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);1290 return ret;1291 }1292 1293 /* Don't need rfe_ctl_lock during initialisation */1294 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);1295 if (ret < 0) {1296 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);1297 return ret;1298 }1299 1300 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;1301 1302 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);1303 if (ret < 0) {1304 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);1305 return ret;1306 }1307 1308 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);1309 if (ret < 0) {1310 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);1311 return ret;1312 }1313 1314 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",1315 pdata->rfe_ctl);1316 1317 /* Enable or disable checksum offload engines */1318 smsc75xx_set_features(dev->net, dev->net->features);1319 1320 smsc75xx_set_multicast(dev->net);1321 1322 ret = smsc75xx_phy_initialize(dev);1323 if (ret < 0) {1324 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);1325 return ret;1326 }1327 1328 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);1329 if (ret < 0) {1330 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);1331 return ret;1332 }1333 1334 /* enable PHY interrupts */1335 buf |= INT_ENP_PHY_INT;1336 1337 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);1338 if (ret < 0) {1339 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);1340 return ret;1341 }1342 1343 /* allow mac to detect speed and duplex from phy */1344 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);1345 if (ret < 0) {1346 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);1347 return ret;1348 }1349 1350 buf |= (MAC_CR_ADD | MAC_CR_ASD);1351 ret = smsc75xx_write_reg(dev, MAC_CR, buf);1352 if (ret < 0) {1353 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);1354 return ret;1355 }1356 1357 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);1358 if (ret < 0) {1359 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);1360 return ret;1361 }1362 1363 buf |= MAC_TX_TXEN;1364 1365 ret = smsc75xx_write_reg(dev, MAC_TX, buf);1366 if (ret < 0) {1367 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);1368 return ret;1369 }1370 1371 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);1372 1373 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);1374 if (ret < 0) {1375 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);1376 return ret;1377 }1378 1379 buf |= FCT_TX_CTL_EN;1380 1381 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);1382 if (ret < 0) {1383 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);1384 return ret;1385 }1386 1387 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);1388 1389 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);1390 if (ret < 0) {1391 netdev_warn(dev->net, "Failed to set max rx frame length\n");1392 return ret;1393 }1394 1395 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);1396 if (ret < 0) {1397 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);1398 return ret;1399 }1400 1401 buf |= MAC_RX_RXEN;1402 1403 ret = smsc75xx_write_reg(dev, MAC_RX, buf);1404 if (ret < 0) {1405 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);1406 return ret;1407 }1408 1409 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);1410 1411 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);1412 if (ret < 0) {1413 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);1414 return ret;1415 }1416 1417 buf |= FCT_RX_CTL_EN;1418 1419 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);1420 if (ret < 0) {1421 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);1422 return ret;1423 }1424 1425 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);1426 1427 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");1428 return 0;1429}1430 1431static const struct net_device_ops smsc75xx_netdev_ops = {1432 .ndo_open = usbnet_open,1433 .ndo_stop = usbnet_stop,1434 .ndo_start_xmit = usbnet_start_xmit,1435 .ndo_tx_timeout = usbnet_tx_timeout,1436 .ndo_get_stats64 = dev_get_tstats64,1437 .ndo_change_mtu = smsc75xx_change_mtu,1438 .ndo_set_mac_address = eth_mac_addr,1439 .ndo_validate_addr = eth_validate_addr,1440 .ndo_eth_ioctl = smsc75xx_ioctl,1441 .ndo_set_rx_mode = smsc75xx_set_multicast,1442 .ndo_set_features = smsc75xx_set_features,1443};1444 1445static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)1446{1447 struct smsc75xx_priv *pdata = NULL;1448 int ret;1449 1450 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");1451 1452 ret = usbnet_get_endpoints(dev, intf);1453 if (ret < 0) {1454 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);1455 return ret;1456 }1457 1458 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),1459 GFP_KERNEL);1460 1461 pdata = (struct smsc75xx_priv *)(dev->data[0]);1462 if (!pdata)1463 return -ENOMEM;1464 1465 pdata->dev = dev;1466 1467 spin_lock_init(&pdata->rfe_ctl_lock);1468 mutex_init(&pdata->dataport_mutex);1469 1470 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);1471 1472 if (DEFAULT_TX_CSUM_ENABLE)1473 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;1474 1475 if (DEFAULT_RX_CSUM_ENABLE)1476 dev->net->features |= NETIF_F_RXCSUM;1477 1478 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |1479 NETIF_F_RXCSUM;1480 1481 ret = smsc75xx_wait_ready(dev, 0);1482 if (ret < 0) {1483 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");1484 goto free_pdata;1485 }1486 1487 smsc75xx_init_mac_address(dev);1488 1489 /* Init all registers */1490 ret = smsc75xx_reset(dev);1491 if (ret < 0) {1492 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);1493 goto cancel_work;1494 }1495 1496 dev->net->netdev_ops = &smsc75xx_netdev_ops;1497 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;1498 dev->net->flags |= IFF_MULTICAST;1499 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;1500 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;1501 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;1502 return 0;1503 1504cancel_work:1505 cancel_work_sync(&pdata->set_multicast);1506free_pdata:1507 kfree(pdata);1508 dev->data[0] = 0;1509 return ret;1510}1511 1512static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)1513{1514 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1515 if (pdata) {1516 cancel_work_sync(&pdata->set_multicast);1517 netif_dbg(dev, ifdown, dev->net, "free pdata\n");1518 kfree(pdata);1519 dev->data[0] = 0;1520 }1521}1522 1523static u16 smsc_crc(const u8 *buffer, size_t len)1524{1525 return bitrev16(crc16(0xFFFF, buffer, len));1526}1527 1528static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,1529 u32 wuf_mask1)1530{1531 int cfg_base = WUF_CFGX + filter * 4;1532 int mask_base = WUF_MASKX + filter * 16;1533 int ret;1534 1535 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);1536 if (ret < 0) {1537 netdev_warn(dev->net, "Error writing WUF_CFGX\n");1538 return ret;1539 }1540 1541 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);1542 if (ret < 0) {1543 netdev_warn(dev->net, "Error writing WUF_MASKX\n");1544 return ret;1545 }1546 1547 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);1548 if (ret < 0) {1549 netdev_warn(dev->net, "Error writing WUF_MASKX\n");1550 return ret;1551 }1552 1553 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);1554 if (ret < 0) {1555 netdev_warn(dev->net, "Error writing WUF_MASKX\n");1556 return ret;1557 }1558 1559 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);1560 if (ret < 0) {1561 netdev_warn(dev->net, "Error writing WUF_MASKX\n");1562 return ret;1563 }1564 1565 return 0;1566}1567 1568static int smsc75xx_enter_suspend0(struct usbnet *dev)1569{1570 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1571 u32 val;1572 int ret;1573 1574 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1575 if (ret < 0) {1576 netdev_warn(dev->net, "Error reading PMT_CTL\n");1577 return ret;1578 }1579 1580 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));1581 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;1582 1583 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1584 if (ret < 0) {1585 netdev_warn(dev->net, "Error writing PMT_CTL\n");1586 return ret;1587 }1588 1589 pdata->suspend_flags |= SUSPEND_SUSPEND0;1590 1591 return 0;1592}1593 1594static int smsc75xx_enter_suspend1(struct usbnet *dev)1595{1596 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1597 u32 val;1598 int ret;1599 1600 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1601 if (ret < 0) {1602 netdev_warn(dev->net, "Error reading PMT_CTL\n");1603 return ret;1604 }1605 1606 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);1607 val |= PMT_CTL_SUS_MODE_1;1608 1609 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1610 if (ret < 0) {1611 netdev_warn(dev->net, "Error writing PMT_CTL\n");1612 return ret;1613 }1614 1615 /* clear wol status, enable energy detection */1616 val &= ~PMT_CTL_WUPS;1617 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);1618 1619 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1620 if (ret < 0) {1621 netdev_warn(dev->net, "Error writing PMT_CTL\n");1622 return ret;1623 }1624 1625 pdata->suspend_flags |= SUSPEND_SUSPEND1;1626 1627 return 0;1628}1629 1630static int smsc75xx_enter_suspend2(struct usbnet *dev)1631{1632 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1633 u32 val;1634 int ret;1635 1636 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1637 if (ret < 0) {1638 netdev_warn(dev->net, "Error reading PMT_CTL\n");1639 return ret;1640 }1641 1642 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);1643 val |= PMT_CTL_SUS_MODE_2;1644 1645 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1646 if (ret < 0) {1647 netdev_warn(dev->net, "Error writing PMT_CTL\n");1648 return ret;1649 }1650 1651 pdata->suspend_flags |= SUSPEND_SUSPEND2;1652 1653 return 0;1654}1655 1656static int smsc75xx_enter_suspend3(struct usbnet *dev)1657{1658 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1659 u32 val;1660 int ret;1661 1662 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);1663 if (ret < 0) {1664 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");1665 return ret;1666 }1667 1668 if (val & FCT_RX_CTL_RXUSED) {1669 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");1670 return -EBUSY;1671 }1672 1673 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1674 if (ret < 0) {1675 netdev_warn(dev->net, "Error reading PMT_CTL\n");1676 return ret;1677 }1678 1679 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);1680 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;1681 1682 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1683 if (ret < 0) {1684 netdev_warn(dev->net, "Error writing PMT_CTL\n");1685 return ret;1686 }1687 1688 /* clear wol status */1689 val &= ~PMT_CTL_WUPS;1690 val |= PMT_CTL_WUPS_WOL;1691 1692 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1693 if (ret < 0) {1694 netdev_warn(dev->net, "Error writing PMT_CTL\n");1695 return ret;1696 }1697 1698 pdata->suspend_flags |= SUSPEND_SUSPEND3;1699 1700 return 0;1701}1702 1703static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)1704{1705 struct mii_if_info *mii = &dev->mii;1706 int ret;1707 1708 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");1709 1710 /* read to clear */1711 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);1712 if (ret < 0) {1713 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");1714 return ret;1715 }1716 1717 /* enable interrupt source */1718 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);1719 if (ret < 0) {1720 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");1721 return ret;1722 }1723 1724 ret |= mask;1725 1726 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);1727 1728 return 0;1729}1730 1731static int smsc75xx_link_ok_nopm(struct usbnet *dev)1732{1733 struct mii_if_info *mii = &dev->mii;1734 int ret;1735 1736 /* first, a dummy read, needed to latch some MII phys */1737 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);1738 if (ret < 0) {1739 netdev_warn(dev->net, "Error reading MII_BMSR\n");1740 return ret;1741 }1742 1743 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);1744 if (ret < 0) {1745 netdev_warn(dev->net, "Error reading MII_BMSR\n");1746 return ret;1747 }1748 1749 return !!(ret & BMSR_LSTATUS);1750}1751 1752static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)1753{1754 int ret;1755 1756 if (!netif_running(dev->net)) {1757 /* interface is ifconfig down so fully power down hw */1758 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");1759 return smsc75xx_enter_suspend2(dev);1760 }1761 1762 if (!link_up) {1763 /* link is down so enter EDPD mode */1764 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");1765 1766 /* enable PHY wakeup events for if cable is attached */1767 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,1768 PHY_INT_MASK_ANEG_COMP);1769 if (ret < 0) {1770 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");1771 return ret;1772 }1773 1774 netdev_info(dev->net, "entering SUSPEND1 mode\n");1775 return smsc75xx_enter_suspend1(dev);1776 }1777 1778 /* enable PHY wakeup events so we remote wakeup if cable is pulled */1779 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,1780 PHY_INT_MASK_LINK_DOWN);1781 if (ret < 0) {1782 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");1783 return ret;1784 }1785 1786 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");1787 return smsc75xx_enter_suspend3(dev);1788}1789 1790static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)1791{1792 struct usbnet *dev = usb_get_intfdata(intf);1793 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);1794 u32 val, link_up;1795 int ret;1796 1797 ret = usbnet_suspend(intf, message);1798 if (ret < 0) {1799 netdev_warn(dev->net, "usbnet_suspend error\n");1800 return ret;1801 }1802 1803 if (pdata->suspend_flags) {1804 netdev_warn(dev->net, "error during last resume\n");1805 pdata->suspend_flags = 0;1806 }1807 1808 /* determine if link is up using only _nopm functions */1809 link_up = smsc75xx_link_ok_nopm(dev);1810 1811 if (message.event == PM_EVENT_AUTO_SUSPEND) {1812 ret = smsc75xx_autosuspend(dev, link_up);1813 goto done;1814 }1815 1816 /* if we get this far we're not autosuspending */1817 /* if no wol options set, or if link is down and we're not waking on1818 * PHY activity, enter lowest power SUSPEND2 mode1819 */1820 if (!(pdata->wolopts & SUPPORTED_WAKE) ||1821 !(link_up || (pdata->wolopts & WAKE_PHY))) {1822 netdev_info(dev->net, "entering SUSPEND2 mode\n");1823 1824 /* disable energy detect (link up) & wake up events */1825 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);1826 if (ret < 0) {1827 netdev_warn(dev->net, "Error reading WUCSR\n");1828 goto done;1829 }1830 1831 val &= ~(WUCSR_MPEN | WUCSR_WUEN);1832 1833 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);1834 if (ret < 0) {1835 netdev_warn(dev->net, "Error writing WUCSR\n");1836 goto done;1837 }1838 1839 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1840 if (ret < 0) {1841 netdev_warn(dev->net, "Error reading PMT_CTL\n");1842 goto done;1843 }1844 1845 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);1846 1847 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);1848 if (ret < 0) {1849 netdev_warn(dev->net, "Error writing PMT_CTL\n");1850 goto done;1851 }1852 1853 ret = smsc75xx_enter_suspend2(dev);1854 goto done;1855 }1856 1857 if (pdata->wolopts & WAKE_PHY) {1858 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,1859 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));1860 if (ret < 0) {1861 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");1862 goto done;1863 }1864 1865 /* if link is down then configure EDPD and enter SUSPEND1,1866 * otherwise enter SUSPEND0 below1867 */1868 if (!link_up) {1869 struct mii_if_info *mii = &dev->mii;1870 netdev_info(dev->net, "entering SUSPEND1 mode\n");1871 1872 /* enable energy detect power-down mode */1873 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,1874 PHY_MODE_CTRL_STS);1875 if (ret < 0) {1876 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");1877 goto done;1878 }1879 1880 ret |= MODE_CTRL_STS_EDPWRDOWN;1881 1882 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,1883 PHY_MODE_CTRL_STS, ret);1884 1885 /* enter SUSPEND1 mode */1886 ret = smsc75xx_enter_suspend1(dev);1887 goto done;1888 }1889 }1890 1891 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {1892 int i, filter = 0;1893 1894 /* disable all filters */1895 for (i = 0; i < WUF_NUM; i++) {1896 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);1897 if (ret < 0) {1898 netdev_warn(dev->net, "Error writing WUF_CFGX\n");1899 goto done;1900 }1901 }1902 1903 if (pdata->wolopts & WAKE_MCAST) {1904 const u8 mcast[] = {0x01, 0x00, 0x5E};1905 netdev_info(dev->net, "enabling multicast detection\n");1906 1907 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST1908 | smsc_crc(mcast, 3);1909 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);1910 if (ret < 0) {1911 netdev_warn(dev->net, "Error writing wakeup filter\n");1912 goto done;1913 }1914 }1915 1916 if (pdata->wolopts & WAKE_ARP) {1917 const u8 arp[] = {0x08, 0x06};1918 netdev_info(dev->net, "enabling ARP detection\n");1919 1920 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)1921 | smsc_crc(arp, 2);1922 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);1923 if (ret < 0) {1924 netdev_warn(dev->net, "Error writing wakeup filter\n");1925 goto done;1926 }1927 }1928 1929 /* clear any pending pattern match packet status */1930 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);1931 if (ret < 0) {1932 netdev_warn(dev->net, "Error reading WUCSR\n");1933 goto done;1934 }1935 1936 val |= WUCSR_WUFR;1937 1938 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);1939 if (ret < 0) {1940 netdev_warn(dev->net, "Error writing WUCSR\n");1941 goto done;1942 }1943 1944 netdev_info(dev->net, "enabling packet match detection\n");1945 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);1946 if (ret < 0) {1947 netdev_warn(dev->net, "Error reading WUCSR\n");1948 goto done;1949 }1950 1951 val |= WUCSR_WUEN;1952 1953 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);1954 if (ret < 0) {1955 netdev_warn(dev->net, "Error writing WUCSR\n");1956 goto done;1957 }1958 } else {1959 netdev_info(dev->net, "disabling packet match detection\n");1960 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);1961 if (ret < 0) {1962 netdev_warn(dev->net, "Error reading WUCSR\n");1963 goto done;1964 }1965 1966 val &= ~WUCSR_WUEN;1967 1968 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);1969 if (ret < 0) {1970 netdev_warn(dev->net, "Error writing WUCSR\n");1971 goto done;1972 }1973 }1974 1975 /* disable magic, bcast & unicast wakeup sources */1976 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);1977 if (ret < 0) {1978 netdev_warn(dev->net, "Error reading WUCSR\n");1979 goto done;1980 }1981 1982 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);1983 1984 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);1985 if (ret < 0) {1986 netdev_warn(dev->net, "Error writing WUCSR\n");1987 goto done;1988 }1989 1990 if (pdata->wolopts & WAKE_PHY) {1991 netdev_info(dev->net, "enabling PHY wakeup\n");1992 1993 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);1994 if (ret < 0) {1995 netdev_warn(dev->net, "Error reading PMT_CTL\n");1996 goto done;1997 }1998 1999 /* clear wol status, enable energy detection */2000 val &= ~PMT_CTL_WUPS;2001 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);2002 2003 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);2004 if (ret < 0) {2005 netdev_warn(dev->net, "Error writing PMT_CTL\n");2006 goto done;2007 }2008 }2009 2010 if (pdata->wolopts & WAKE_MAGIC) {2011 netdev_info(dev->net, "enabling magic packet wakeup\n");2012 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);2013 if (ret < 0) {2014 netdev_warn(dev->net, "Error reading WUCSR\n");2015 goto done;2016 }2017 2018 /* clear any pending magic packet status */2019 val |= WUCSR_MPR | WUCSR_MPEN;2020 2021 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);2022 if (ret < 0) {2023 netdev_warn(dev->net, "Error writing WUCSR\n");2024 goto done;2025 }2026 }2027 2028 if (pdata->wolopts & WAKE_BCAST) {2029 netdev_info(dev->net, "enabling broadcast detection\n");2030 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);2031 if (ret < 0) {2032 netdev_warn(dev->net, "Error reading WUCSR\n");2033 goto done;2034 }2035 2036 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;2037 2038 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);2039 if (ret < 0) {2040 netdev_warn(dev->net, "Error writing WUCSR\n");2041 goto done;2042 }2043 }2044 2045 if (pdata->wolopts & WAKE_UCAST) {2046 netdev_info(dev->net, "enabling unicast detection\n");2047 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);2048 if (ret < 0) {2049 netdev_warn(dev->net, "Error reading WUCSR\n");2050 goto done;2051 }2052 2053 val |= WUCSR_WUFR | WUCSR_PFDA_EN;2054 2055 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);2056 if (ret < 0) {2057 netdev_warn(dev->net, "Error writing WUCSR\n");2058 goto done;2059 }2060 }2061 2062 /* enable receiver to enable frame reception */2063 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);2064 if (ret < 0) {2065 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);2066 goto done;2067 }2068 2069 val |= MAC_RX_RXEN;2070 2071 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);2072 if (ret < 0) {2073 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);2074 goto done;2075 }2076 2077 /* some wol options are enabled, so enter SUSPEND0 */2078 netdev_info(dev->net, "entering SUSPEND0 mode\n");2079 ret = smsc75xx_enter_suspend0(dev);2080 2081done:2082 /*2083 * TODO: resume() might need to handle the suspend failure2084 * in system sleep2085 */2086 if (ret && PMSG_IS_AUTO(message))2087 usbnet_resume(intf);2088 return ret;2089}2090 2091static int smsc75xx_resume(struct usb_interface *intf)2092{2093 struct usbnet *dev = usb_get_intfdata(intf);2094 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);2095 u8 suspend_flags = pdata->suspend_flags;2096 int ret;2097 u32 val;2098 2099 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);2100 2101 /* do this first to ensure it's cleared even in error case */2102 pdata->suspend_flags = 0;2103 2104 if (suspend_flags & SUSPEND_ALLMODES) {2105 /* Disable wakeup sources */2106 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);2107 if (ret < 0) {2108 netdev_warn(dev->net, "Error reading WUCSR\n");2109 return ret;2110 }2111 2112 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN2113 | WUCSR_BCST_EN);2114 2115 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);2116 if (ret < 0) {2117 netdev_warn(dev->net, "Error writing WUCSR\n");2118 return ret;2119 }2120 2121 /* clear wake-up status */2122 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);2123 if (ret < 0) {2124 netdev_warn(dev->net, "Error reading PMT_CTL\n");2125 return ret;2126 }2127 2128 val &= ~PMT_CTL_WOL_EN;2129 val |= PMT_CTL_WUPS;2130 2131 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);2132 if (ret < 0) {2133 netdev_warn(dev->net, "Error writing PMT_CTL\n");2134 return ret;2135 }2136 }2137 2138 if (suspend_flags & SUSPEND_SUSPEND2) {2139 netdev_info(dev->net, "resuming from SUSPEND2\n");2140 2141 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);2142 if (ret < 0) {2143 netdev_warn(dev->net, "Error reading PMT_CTL\n");2144 return ret;2145 }2146 2147 val |= PMT_CTL_PHY_PWRUP;2148 2149 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);2150 if (ret < 0) {2151 netdev_warn(dev->net, "Error writing PMT_CTL\n");2152 return ret;2153 }2154 }2155 2156 ret = smsc75xx_wait_ready(dev, 1);2157 if (ret < 0) {2158 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");2159 return ret;2160 }2161 2162 return usbnet_resume(intf);2163}2164 2165static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,2166 u32 rx_cmd_a, u32 rx_cmd_b)2167{2168 if (!(dev->net->features & NETIF_F_RXCSUM) ||2169 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {2170 skb->ip_summed = CHECKSUM_NONE;2171 } else {2172 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));2173 skb->ip_summed = CHECKSUM_COMPLETE;2174 }2175}2176 2177static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)2178{2179 /* This check is no longer done by usbnet */2180 if (skb->len < dev->net->hard_header_len)2181 return 0;2182 2183 while (skb->len > 0) {2184 u32 rx_cmd_a, rx_cmd_b, align_count, size;2185 struct sk_buff *ax_skb;2186 unsigned char *packet;2187 2188 rx_cmd_a = get_unaligned_le32(skb->data);2189 skb_pull(skb, 4);2190 2191 rx_cmd_b = get_unaligned_le32(skb->data);2192 skb_pull(skb, 4 + RXW_PADDING);2193 2194 packet = skb->data;2195 2196 /* get the packet length */2197 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;2198 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;2199 2200 if (unlikely(size > skb->len)) {2201 netif_dbg(dev, rx_err, dev->net,2202 "size err rx_cmd_a=0x%08x\n",2203 rx_cmd_a);2204 return 0;2205 }2206 2207 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {2208 netif_dbg(dev, rx_err, dev->net,2209 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);2210 dev->net->stats.rx_errors++;2211 dev->net->stats.rx_dropped++;2212 2213 if (rx_cmd_a & RX_CMD_A_FCS)2214 dev->net->stats.rx_crc_errors++;2215 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))2216 dev->net->stats.rx_frame_errors++;2217 } else {2218 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */2219 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {2220 netif_dbg(dev, rx_err, dev->net,2221 "size err rx_cmd_a=0x%08x\n",2222 rx_cmd_a);2223 return 0;2224 }2225 2226 /* last frame in this batch */2227 if (skb->len == size) {2228 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,2229 rx_cmd_b);2230 2231 skb_trim(skb, skb->len - 4); /* remove fcs */2232 2233 return 1;2234 }2235 2236 /* Use "size - 4" to remove fcs */2237 ax_skb = netdev_alloc_skb_ip_align(dev->net, size - 4);2238 if (unlikely(!ax_skb)) {2239 netdev_warn(dev->net, "Error allocating skb\n");2240 return 0;2241 }2242 2243 skb_put(ax_skb, size - 4);2244 memcpy(ax_skb->data, packet, size - 4);2245 2246 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,2247 rx_cmd_b);2248 2249 usbnet_skb_return(dev, ax_skb);2250 }2251 2252 skb_pull(skb, size);2253 2254 /* padding bytes before the next frame starts */2255 if (skb->len)2256 skb_pull(skb, align_count);2257 }2258 2259 return 1;2260}2261 2262static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,2263 struct sk_buff *skb, gfp_t flags)2264{2265 u32 tx_cmd_a, tx_cmd_b;2266 void *ptr;2267 2268 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {2269 dev_kfree_skb_any(skb);2270 return NULL;2271 }2272 2273 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;2274 2275 if (skb->ip_summed == CHECKSUM_PARTIAL)2276 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;2277 2278 if (skb_is_gso(skb)) {2279 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);2280 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;2281 2282 tx_cmd_a |= TX_CMD_A_LSO;2283 } else {2284 tx_cmd_b = 0;2285 }2286 2287 ptr = skb_push(skb, 8);2288 put_unaligned_le32(tx_cmd_a, ptr);2289 put_unaligned_le32(tx_cmd_b, ptr + 4);2290 2291 return skb;2292}2293 2294static int smsc75xx_manage_power(struct usbnet *dev, int on)2295{2296 dev->intf->needs_remote_wakeup = on;2297 return 0;2298}2299 2300static const struct driver_info smsc75xx_info = {2301 .description = "smsc75xx USB 2.0 Gigabit Ethernet",2302 .bind = smsc75xx_bind,2303 .unbind = smsc75xx_unbind,2304 .link_reset = smsc75xx_link_reset,2305 .reset = smsc75xx_reset,2306 .rx_fixup = smsc75xx_rx_fixup,2307 .tx_fixup = smsc75xx_tx_fixup,2308 .status = smsc75xx_status,2309 .manage_power = smsc75xx_manage_power,2310 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,2311};2312 2313static const struct usb_device_id products[] = {2314 {2315 /* SMSC7500 USB Gigabit Ethernet Device */2316 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),2317 .driver_info = (unsigned long) &smsc75xx_info,2318 },2319 {2320 /* SMSC7500 USB Gigabit Ethernet Device */2321 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),2322 .driver_info = (unsigned long) &smsc75xx_info,2323 },2324 { }, /* END */2325};2326MODULE_DEVICE_TABLE(usb, products);2327 2328static struct usb_driver smsc75xx_driver = {2329 .name = SMSC_CHIPNAME,2330 .id_table = products,2331 .probe = usbnet_probe,2332 .suspend = smsc75xx_suspend,2333 .resume = smsc75xx_resume,2334 .reset_resume = smsc75xx_resume,2335 .disconnect = usbnet_disconnect,2336 .disable_hub_initiated_lpm = 1,2337 .supports_autosuspend = 1,2338};2339 2340module_usb_driver(smsc75xx_driver);2341 2342MODULE_AUTHOR("Nancy Lin");2343MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");2344MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");2345MODULE_LICENSE("GPL");2346