linux/drivers/net/usb/sr9800.c
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   1/* CoreChip-sz SR9800 one chip USB 2.0 Ethernet Devices
   2 *
   3 * Author : Liu Junliang <liujunliang_ljl@163.com>
   4 *
   5 * Based on asix_common.c, asix_devices.c
   6 *
   7 * This file is licensed under the terms of the GNU General Public License
   8 * version 2.  This program is licensed "as is" without any warranty of any
   9 * kind, whether express or implied.*
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/kmod.h>
  14#include <linux/init.h>
  15#include <linux/netdevice.h>
  16#include <linux/etherdevice.h>
  17#include <linux/ethtool.h>
  18#include <linux/workqueue.h>
  19#include <linux/mii.h>
  20#include <linux/usb.h>
  21#include <linux/crc32.h>
  22#include <linux/usb/usbnet.h>
  23#include <linux/slab.h>
  24#include <linux/if_vlan.h>
  25
  26#include "sr9800.h"
  27
  28static int sr_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  29                            u16 size, void *data)
  30{
  31        int err;
  32
  33        err = usbnet_read_cmd(dev, cmd, SR_REQ_RD_REG, value, index,
  34                              data, size);
  35        if ((err != size) && (err >= 0))
  36                err = -EINVAL;
  37
  38        return err;
  39}
  40
  41static int sr_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  42                             u16 size, void *data)
  43{
  44        int err;
  45
  46        err = usbnet_write_cmd(dev, cmd, SR_REQ_WR_REG, value, index,
  47                              data, size);
  48        if ((err != size) && (err >= 0))
  49                err = -EINVAL;
  50
  51        return err;
  52}
  53
  54static void
  55sr_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  56                   u16 size, void *data)
  57{
  58        usbnet_write_cmd_async(dev, cmd, SR_REQ_WR_REG, value, index, data,
  59                               size);
  60}
  61
  62static int sr_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
  63{
  64        int offset = 0;
  65
  66        /* This check is no longer done by usbnet */
  67        if (skb->len < dev->net->hard_header_len)
  68                return 0;
  69
  70        while (offset + sizeof(u32) < skb->len) {
  71                struct sk_buff *sr_skb;
  72                u16 size;
  73                u32 header = get_unaligned_le32(skb->data + offset);
  74
  75                offset += sizeof(u32);
  76                /* get the packet length */
  77                size = (u16) (header & 0x7ff);
  78                if (size != ((~header >> 16) & 0x07ff)) {
  79                        netdev_err(dev->net, "%s : Bad Header Length\n",
  80                                   __func__);
  81                        return 0;
  82                }
  83
  84                if ((size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) ||
  85                    (size + offset > skb->len)) {
  86                        netdev_err(dev->net, "%s : Bad RX Length %d\n",
  87                                   __func__, size);
  88                        return 0;
  89                }
  90                sr_skb = netdev_alloc_skb_ip_align(dev->net, size);
  91                if (!sr_skb)
  92                        return 0;
  93
  94                skb_put(sr_skb, size);
  95                memcpy(sr_skb->data, skb->data + offset, size);
  96                usbnet_skb_return(dev, sr_skb);
  97
  98                offset += (size + 1) & 0xfffe;
  99        }
 100
 101        if (skb->len != offset) {
 102                netdev_err(dev->net, "%s : Bad SKB Length %d\n", __func__,
 103                           skb->len);
 104                return 0;
 105        }
 106
 107        return 1;
 108}
 109
 110static struct sk_buff *sr_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 111                                        gfp_t flags)
 112{
 113        int headroom = skb_headroom(skb);
 114        int tailroom = skb_tailroom(skb);
 115        u32 padbytes = 0xffff0000;
 116        u32 packet_len;
 117        int padlen;
 118
 119        padlen = ((skb->len + 4) % (dev->maxpacket - 1)) ? 0 : 4;
 120
 121        if ((!skb_cloned(skb)) && ((headroom + tailroom) >= (4 + padlen))) {
 122                if ((headroom < 4) || (tailroom < padlen)) {
 123                        skb->data = memmove(skb->head + 4, skb->data,
 124                                            skb->len);
 125                        skb_set_tail_pointer(skb, skb->len);
 126                }
 127        } else {
 128                struct sk_buff *skb2;
 129                skb2 = skb_copy_expand(skb, 4, padlen, flags);
 130                dev_kfree_skb_any(skb);
 131                skb = skb2;
 132                if (!skb)
 133                        return NULL;
 134        }
 135
 136        skb_push(skb, 4);
 137        packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
 138        cpu_to_le32s(&packet_len);
 139        skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
 140
 141        if (padlen) {
 142                cpu_to_le32s(&padbytes);
 143                memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
 144                skb_put(skb, sizeof(padbytes));
 145        }
 146
 147        return skb;
 148}
 149
 150static void sr_status(struct usbnet *dev, struct urb *urb)
 151{
 152        struct sr9800_int_data *event;
 153        int link;
 154
 155        if (urb->actual_length < 8)
 156                return;
 157
 158        event = urb->transfer_buffer;
 159        link = event->link & 0x01;
 160        if (netif_carrier_ok(dev->net) != link) {
 161                usbnet_link_change(dev, link, 1);
 162                netdev_dbg(dev->net, "Link Status is: %d\n", link);
 163        }
 164
 165        return;
 166}
 167
 168static inline int sr_set_sw_mii(struct usbnet *dev)
 169{
 170        int ret;
 171
 172        ret = sr_write_cmd(dev, SR_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
 173        if (ret < 0)
 174                netdev_err(dev->net, "Failed to enable software MII access\n");
 175        return ret;
 176}
 177
 178static inline int sr_set_hw_mii(struct usbnet *dev)
 179{
 180        int ret;
 181
 182        ret = sr_write_cmd(dev, SR_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
 183        if (ret < 0)
 184                netdev_err(dev->net, "Failed to enable hardware MII access\n");
 185        return ret;
 186}
 187
 188static inline int sr_get_phy_addr(struct usbnet *dev)
 189{
 190        u8 buf[2];
 191        int ret;
 192
 193        ret = sr_read_cmd(dev, SR_CMD_READ_PHY_ID, 0, 0, 2, buf);
 194        if (ret < 0) {
 195                netdev_err(dev->net, "%s : Error reading PHYID register:%02x\n",
 196                           __func__, ret);
 197                goto out;
 198        }
 199        netdev_dbg(dev->net, "%s : returning 0x%04x\n", __func__,
 200                   *((__le16 *)buf));
 201
 202        ret = buf[1];
 203
 204out:
 205        return ret;
 206}
 207
 208static int sr_sw_reset(struct usbnet *dev, u8 flags)
 209{
 210        int ret;
 211
 212        ret = sr_write_cmd(dev, SR_CMD_SW_RESET, flags, 0, 0, NULL);
 213        if (ret < 0)
 214                netdev_err(dev->net, "Failed to send software reset:%02x\n",
 215                           ret);
 216
 217        return ret;
 218}
 219
 220static u16 sr_read_rx_ctl(struct usbnet *dev)
 221{
 222        __le16 v;
 223        int ret;
 224
 225        ret = sr_read_cmd(dev, SR_CMD_READ_RX_CTL, 0, 0, 2, &v);
 226        if (ret < 0) {
 227                netdev_err(dev->net, "Error reading RX_CTL register:%02x\n",
 228                           ret);
 229                goto out;
 230        }
 231
 232        ret = le16_to_cpu(v);
 233out:
 234        return ret;
 235}
 236
 237static int sr_write_rx_ctl(struct usbnet *dev, u16 mode)
 238{
 239        int ret;
 240
 241        netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
 242        ret = sr_write_cmd(dev, SR_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
 243        if (ret < 0)
 244                netdev_err(dev->net,
 245                           "Failed to write RX_CTL mode to 0x%04x:%02x\n",
 246                           mode, ret);
 247
 248        return ret;
 249}
 250
 251static u16 sr_read_medium_status(struct usbnet *dev)
 252{
 253        __le16 v;
 254        int ret;
 255
 256        ret = sr_read_cmd(dev, SR_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
 257        if (ret < 0) {
 258                netdev_err(dev->net,
 259                           "Error reading Medium Status register:%02x\n", ret);
 260                return ret;     /* TODO: callers not checking for error ret */
 261        }
 262
 263        return le16_to_cpu(v);
 264}
 265
 266static int sr_write_medium_mode(struct usbnet *dev, u16 mode)
 267{
 268        int ret;
 269
 270        netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
 271        ret = sr_write_cmd(dev, SR_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
 272        if (ret < 0)
 273                netdev_err(dev->net,
 274                           "Failed to write Medium Mode mode to 0x%04x:%02x\n",
 275                           mode, ret);
 276        return ret;
 277}
 278
 279static int sr_write_gpio(struct usbnet *dev, u16 value, int sleep)
 280{
 281        int ret;
 282
 283        netdev_dbg(dev->net, "%s : value = 0x%04x\n", __func__, value);
 284        ret = sr_write_cmd(dev, SR_CMD_WRITE_GPIOS, value, 0, 0, NULL);
 285        if (ret < 0)
 286                netdev_err(dev->net, "Failed to write GPIO value 0x%04x:%02x\n",
 287                           value, ret);
 288        if (sleep)
 289                msleep(sleep);
 290
 291        return ret;
 292}
 293
 294/* SR9800 have a 16-bit RX_CTL value */
 295static void sr_set_multicast(struct net_device *net)
 296{
 297        struct usbnet *dev = netdev_priv(net);
 298        struct sr_data *data = (struct sr_data *)&dev->data;
 299        u16 rx_ctl = SR_DEFAULT_RX_CTL;
 300
 301        if (net->flags & IFF_PROMISC) {
 302                rx_ctl |= SR_RX_CTL_PRO;
 303        } else if (net->flags & IFF_ALLMULTI ||
 304                   netdev_mc_count(net) > SR_MAX_MCAST) {
 305                rx_ctl |= SR_RX_CTL_AMALL;
 306        } else if (netdev_mc_empty(net)) {
 307                /* just broadcast and directed */
 308        } else {
 309                /* We use the 20 byte dev->data
 310                 * for our 8 byte filter buffer
 311                 * to avoid allocating memory that
 312                 * is tricky to free later
 313                 */
 314                struct netdev_hw_addr *ha;
 315                u32 crc_bits;
 316
 317                memset(data->multi_filter, 0, SR_MCAST_FILTER_SIZE);
 318
 319                /* Build the multicast hash filter. */
 320                netdev_for_each_mc_addr(ha, net) {
 321                        crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
 322                        data->multi_filter[crc_bits >> 3] |=
 323                            1 << (crc_bits & 7);
 324                }
 325
 326                sr_write_cmd_async(dev, SR_CMD_WRITE_MULTI_FILTER, 0, 0,
 327                                   SR_MCAST_FILTER_SIZE, data->multi_filter);
 328
 329                rx_ctl |= SR_RX_CTL_AM;
 330        }
 331
 332        sr_write_cmd_async(dev, SR_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
 333}
 334
 335static int sr_mdio_read(struct net_device *net, int phy_id, int loc)
 336{
 337        struct usbnet *dev = netdev_priv(net);
 338        __le16 res;
 339
 340        mutex_lock(&dev->phy_mutex);
 341        sr_set_sw_mii(dev);
 342        sr_read_cmd(dev, SR_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, &res);
 343        sr_set_hw_mii(dev);
 344        mutex_unlock(&dev->phy_mutex);
 345
 346        netdev_dbg(dev->net,
 347                   "%s : phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", __func__,
 348                   phy_id, loc, le16_to_cpu(res));
 349
 350        return le16_to_cpu(res);
 351}
 352
 353static void
 354sr_mdio_write(struct net_device *net, int phy_id, int loc, int val)
 355{
 356        struct usbnet *dev = netdev_priv(net);
 357        __le16 res = cpu_to_le16(val);
 358
 359        netdev_dbg(dev->net,
 360                   "%s : phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", __func__,
 361                   phy_id, loc, val);
 362        mutex_lock(&dev->phy_mutex);
 363        sr_set_sw_mii(dev);
 364        sr_write_cmd(dev, SR_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
 365        sr_set_hw_mii(dev);
 366        mutex_unlock(&dev->phy_mutex);
 367}
 368
 369/* Get the PHY Identifier from the PHYSID1 & PHYSID2 MII registers */
 370static u32 sr_get_phyid(struct usbnet *dev)
 371{
 372        int phy_reg;
 373        u32 phy_id;
 374        int i;
 375
 376        /* Poll for the rare case the FW or phy isn't ready yet.  */
 377        for (i = 0; i < 100; i++) {
 378                phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID1);
 379                if (phy_reg != 0 && phy_reg != 0xFFFF)
 380                        break;
 381                mdelay(1);
 382        }
 383
 384        if (phy_reg <= 0 || phy_reg == 0xFFFF)
 385                return 0;
 386
 387        phy_id = (phy_reg & 0xffff) << 16;
 388
 389        phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID2);
 390        if (phy_reg < 0)
 391                return 0;
 392
 393        phy_id |= (phy_reg & 0xffff);
 394
 395        return phy_id;
 396}
 397
 398static void
 399sr_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 400{
 401        struct usbnet *dev = netdev_priv(net);
 402        u8 opt;
 403
 404        if (sr_read_cmd(dev, SR_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
 405                wolinfo->supported = 0;
 406                wolinfo->wolopts = 0;
 407                return;
 408        }
 409        wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
 410        wolinfo->wolopts = 0;
 411        if (opt & SR_MONITOR_LINK)
 412                wolinfo->wolopts |= WAKE_PHY;
 413        if (opt & SR_MONITOR_MAGIC)
 414                wolinfo->wolopts |= WAKE_MAGIC;
 415}
 416
 417static int
 418sr_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 419{
 420        struct usbnet *dev = netdev_priv(net);
 421        u8 opt = 0;
 422
 423        if (wolinfo->wolopts & WAKE_PHY)
 424                opt |= SR_MONITOR_LINK;
 425        if (wolinfo->wolopts & WAKE_MAGIC)
 426                opt |= SR_MONITOR_MAGIC;
 427
 428        if (sr_write_cmd(dev, SR_CMD_WRITE_MONITOR_MODE,
 429                         opt, 0, 0, NULL) < 0)
 430                return -EINVAL;
 431
 432        return 0;
 433}
 434
 435static int sr_get_eeprom_len(struct net_device *net)
 436{
 437        struct usbnet *dev = netdev_priv(net);
 438        struct sr_data *data = (struct sr_data *)&dev->data;
 439
 440        return data->eeprom_len;
 441}
 442
 443static int sr_get_eeprom(struct net_device *net,
 444                              struct ethtool_eeprom *eeprom, u8 *data)
 445{
 446        struct usbnet *dev = netdev_priv(net);
 447        __le16 *ebuf = (__le16 *)data;
 448        int ret;
 449        int i;
 450
 451        /* Crude hack to ensure that we don't overwrite memory
 452         * if an odd length is supplied
 453         */
 454        if (eeprom->len % 2)
 455                return -EINVAL;
 456
 457        eeprom->magic = SR_EEPROM_MAGIC;
 458
 459        /* sr9800 returns 2 bytes from eeprom on read */
 460        for (i = 0; i < eeprom->len / 2; i++) {
 461                ret = sr_read_cmd(dev, SR_CMD_READ_EEPROM, eeprom->offset + i,
 462                                  0, 2, &ebuf[i]);
 463                if (ret < 0)
 464                        return -EINVAL;
 465        }
 466        return 0;
 467}
 468
 469static void sr_get_drvinfo(struct net_device *net,
 470                                 struct ethtool_drvinfo *info)
 471{
 472        struct usbnet *dev = netdev_priv(net);
 473        struct sr_data *data = (struct sr_data *)&dev->data;
 474
 475        /* Inherit standard device info */
 476        usbnet_get_drvinfo(net, info);
 477        strncpy(info->driver, DRIVER_NAME, sizeof(info->driver));
 478        strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
 479        info->eedump_len = data->eeprom_len;
 480}
 481
 482static u32 sr_get_link(struct net_device *net)
 483{
 484        struct usbnet *dev = netdev_priv(net);
 485
 486        return mii_link_ok(&dev->mii);
 487}
 488
 489static int sr_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 490{
 491        struct usbnet *dev = netdev_priv(net);
 492
 493        return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 494}
 495
 496static int sr_set_mac_address(struct net_device *net, void *p)
 497{
 498        struct usbnet *dev = netdev_priv(net);
 499        struct sr_data *data = (struct sr_data *)&dev->data;
 500        struct sockaddr *addr = p;
 501
 502        if (netif_running(net))
 503                return -EBUSY;
 504        if (!is_valid_ether_addr(addr->sa_data))
 505                return -EADDRNOTAVAIL;
 506
 507        memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
 508
 509        /* We use the 20 byte dev->data
 510         * for our 6 byte mac buffer
 511         * to avoid allocating memory that
 512         * is tricky to free later
 513         */
 514        memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
 515        sr_write_cmd_async(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 516                           data->mac_addr);
 517
 518        return 0;
 519}
 520
 521static const struct ethtool_ops sr9800_ethtool_ops = {
 522        .get_drvinfo    = sr_get_drvinfo,
 523        .get_link       = sr_get_link,
 524        .get_msglevel   = usbnet_get_msglevel,
 525        .set_msglevel   = usbnet_set_msglevel,
 526        .get_wol        = sr_get_wol,
 527        .set_wol        = sr_set_wol,
 528        .get_eeprom_len = sr_get_eeprom_len,
 529        .get_eeprom     = sr_get_eeprom,
 530        .get_settings   = usbnet_get_settings,
 531        .set_settings   = usbnet_set_settings,
 532        .nway_reset     = usbnet_nway_reset,
 533};
 534
 535static int sr9800_link_reset(struct usbnet *dev)
 536{
 537        struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 538        u16 mode;
 539
 540        mii_check_media(&dev->mii, 1, 1);
 541        mii_ethtool_gset(&dev->mii, &ecmd);
 542        mode = SR9800_MEDIUM_DEFAULT;
 543
 544        if (ethtool_cmd_speed(&ecmd) != SPEED_100)
 545                mode &= ~SR_MEDIUM_PS;
 546
 547        if (ecmd.duplex != DUPLEX_FULL)
 548                mode &= ~SR_MEDIUM_FD;
 549
 550        netdev_dbg(dev->net, "%s : speed: %u duplex: %d mode: 0x%04x\n",
 551                   __func__, ethtool_cmd_speed(&ecmd), ecmd.duplex, mode);
 552
 553        sr_write_medium_mode(dev, mode);
 554
 555        return 0;
 556}
 557
 558
 559static int sr9800_set_default_mode(struct usbnet *dev)
 560{
 561        u16 rx_ctl;
 562        int ret;
 563
 564        sr_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 565        sr_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 566                      ADVERTISE_ALL | ADVERTISE_CSMA);
 567        mii_nway_restart(&dev->mii);
 568
 569        ret = sr_write_medium_mode(dev, SR9800_MEDIUM_DEFAULT);
 570        if (ret < 0)
 571                goto out;
 572
 573        ret = sr_write_cmd(dev, SR_CMD_WRITE_IPG012,
 574                                SR9800_IPG0_DEFAULT | SR9800_IPG1_DEFAULT,
 575                                SR9800_IPG2_DEFAULT, 0, NULL);
 576        if (ret < 0) {
 577                netdev_dbg(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
 578                goto out;
 579        }
 580
 581        /* Set RX_CTL to default values with 2k buffer, and enable cactus */
 582        ret = sr_write_rx_ctl(dev, SR_DEFAULT_RX_CTL);
 583        if (ret < 0)
 584                goto out;
 585
 586        rx_ctl = sr_read_rx_ctl(dev);
 587        netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
 588                   rx_ctl);
 589
 590        rx_ctl = sr_read_medium_status(dev);
 591        netdev_dbg(dev->net, "Medium Status:0x%04x after all initializations\n",
 592                   rx_ctl);
 593
 594        return 0;
 595out:
 596        return ret;
 597}
 598
 599static int sr9800_reset(struct usbnet *dev)
 600{
 601        struct sr_data *data = (struct sr_data *)&dev->data;
 602        int ret, embd_phy;
 603        u16 rx_ctl;
 604
 605        ret = sr_write_gpio(dev,
 606                        SR_GPIO_RSE | SR_GPIO_GPO_2 | SR_GPIO_GPO2EN, 5);
 607        if (ret < 0)
 608                goto out;
 609
 610        embd_phy = ((sr_get_phy_addr(dev) & 0x1f) == 0x10 ? 1 : 0);
 611
 612        ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
 613        if (ret < 0) {
 614                netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
 615                goto out;
 616        }
 617
 618        ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_PRL);
 619        if (ret < 0)
 620                goto out;
 621
 622        msleep(150);
 623
 624        ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
 625        if (ret < 0)
 626                goto out;
 627
 628        msleep(150);
 629
 630        if (embd_phy) {
 631                ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
 632                if (ret < 0)
 633                        goto out;
 634        } else {
 635                ret = sr_sw_reset(dev, SR_SWRESET_PRTE);
 636                if (ret < 0)
 637                        goto out;
 638        }
 639
 640        msleep(150);
 641        rx_ctl = sr_read_rx_ctl(dev);
 642        netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
 643        ret = sr_write_rx_ctl(dev, 0x0000);
 644        if (ret < 0)
 645                goto out;
 646
 647        rx_ctl = sr_read_rx_ctl(dev);
 648        netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
 649
 650        ret = sr_sw_reset(dev, SR_SWRESET_PRL);
 651        if (ret < 0)
 652                goto out;
 653
 654        msleep(150);
 655
 656        ret = sr_sw_reset(dev, SR_SWRESET_IPRL | SR_SWRESET_PRL);
 657        if (ret < 0)
 658                goto out;
 659
 660        msleep(150);
 661
 662        ret = sr9800_set_default_mode(dev);
 663        if (ret < 0)
 664                goto out;
 665
 666        /* Rewrite MAC address */
 667        memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
 668        ret = sr_write_cmd(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 669                                                        data->mac_addr);
 670        if (ret < 0)
 671                goto out;
 672
 673        return 0;
 674
 675out:
 676        return ret;
 677}
 678
 679static const struct net_device_ops sr9800_netdev_ops = {
 680        .ndo_open               = usbnet_open,
 681        .ndo_stop               = usbnet_stop,
 682        .ndo_start_xmit         = usbnet_start_xmit,
 683        .ndo_tx_timeout         = usbnet_tx_timeout,
 684        .ndo_change_mtu         = usbnet_change_mtu,
 685        .ndo_set_mac_address    = sr_set_mac_address,
 686        .ndo_validate_addr      = eth_validate_addr,
 687        .ndo_do_ioctl           = sr_ioctl,
 688        .ndo_set_rx_mode        = sr_set_multicast,
 689};
 690
 691static int sr9800_phy_powerup(struct usbnet *dev)
 692{
 693        int ret;
 694
 695        /* set the embedded Ethernet PHY in power-down state */
 696        ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_IPRL);
 697        if (ret < 0) {
 698                netdev_err(dev->net, "Failed to power down PHY : %d\n", ret);
 699                return ret;
 700        }
 701        msleep(20);
 702
 703        /* set the embedded Ethernet PHY in power-up state */
 704        ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
 705        if (ret < 0) {
 706                netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
 707                return ret;
 708        }
 709        msleep(600);
 710
 711        /* set the embedded Ethernet PHY in reset state */
 712        ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
 713        if (ret < 0) {
 714                netdev_err(dev->net, "Failed to power up PHY: %d\n", ret);
 715                return ret;
 716        }
 717        msleep(20);
 718
 719        /* set the embedded Ethernet PHY in power-up state */
 720        ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
 721        if (ret < 0) {
 722                netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
 723                return ret;
 724        }
 725
 726        return 0;
 727}
 728
 729static int sr9800_bind(struct usbnet *dev, struct usb_interface *intf)
 730{
 731        struct sr_data *data = (struct sr_data *)&dev->data;
 732        u16 led01_mux, led23_mux;
 733        int ret, embd_phy;
 734        u32 phyid;
 735        u16 rx_ctl;
 736
 737        data->eeprom_len = SR9800_EEPROM_LEN;
 738
 739        usbnet_get_endpoints(dev, intf);
 740
 741        /* LED Setting Rule :
 742         * AABB:CCDD
 743         * AA : MFA0(LED0)
 744         * BB : MFA1(LED1)
 745         * CC : MFA2(LED2), Reserved for SR9800
 746         * DD : MFA3(LED3), Reserved for SR9800
 747         */
 748        led01_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_LINK;
 749        led23_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_TX_ACTIVE;
 750        ret = sr_write_cmd(dev, SR_CMD_LED_MUX, led01_mux, led23_mux, 0, NULL);
 751        if (ret < 0) {
 752                        netdev_err(dev->net, "set LINK LED failed : %d\n", ret);
 753                        goto out;
 754        }
 755
 756        /* Get the MAC address */
 757        ret = sr_read_cmd(dev, SR_CMD_READ_NODE_ID, 0, 0, ETH_ALEN,
 758                          dev->net->dev_addr);
 759        if (ret < 0) {
 760                netdev_dbg(dev->net, "Failed to read MAC address: %d\n", ret);
 761                return ret;
 762        }
 763        netdev_dbg(dev->net, "mac addr : %pM\n", dev->net->dev_addr);
 764
 765        /* Initialize MII structure */
 766        dev->mii.dev = dev->net;
 767        dev->mii.mdio_read = sr_mdio_read;
 768        dev->mii.mdio_write = sr_mdio_write;
 769        dev->mii.phy_id_mask = 0x1f;
 770        dev->mii.reg_num_mask = 0x1f;
 771        dev->mii.phy_id = sr_get_phy_addr(dev);
 772
 773        dev->net->netdev_ops = &sr9800_netdev_ops;
 774        dev->net->ethtool_ops = &sr9800_ethtool_ops;
 775
 776        embd_phy = ((dev->mii.phy_id & 0x1f) == 0x10 ? 1 : 0);
 777        /* Reset the PHY to normal operation mode */
 778        ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
 779        if (ret < 0) {
 780                netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
 781                return ret;
 782        }
 783
 784        /* Init PHY routine */
 785        ret = sr9800_phy_powerup(dev);
 786        if (ret < 0)
 787                goto out;
 788
 789        rx_ctl = sr_read_rx_ctl(dev);
 790        netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
 791        ret = sr_write_rx_ctl(dev, 0x0000);
 792        if (ret < 0)
 793                goto out;
 794
 795        rx_ctl = sr_read_rx_ctl(dev);
 796        netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
 797
 798        /* Read PHYID register *AFTER* the PHY was reset properly */
 799        phyid = sr_get_phyid(dev);
 800        netdev_dbg(dev->net, "PHYID=0x%08x\n", phyid);
 801
 802        /* medium mode setting */
 803        ret = sr9800_set_default_mode(dev);
 804        if (ret < 0)
 805                goto out;
 806
 807        if (dev->udev->speed == USB_SPEED_HIGH) {
 808                ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
 809                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].byte_cnt,
 810                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].threshold,
 811                        0, NULL);
 812                if (ret < 0) {
 813                        netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
 814                        goto out;
 815                }
 816                dev->rx_urb_size =
 817                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].size;
 818        } else {
 819                ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
 820                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].byte_cnt,
 821                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].threshold,
 822                        0, NULL);
 823                if (ret < 0) {
 824                        netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
 825                        goto out;
 826                }
 827                dev->rx_urb_size =
 828                        SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].size;
 829        }
 830        netdev_dbg(dev->net, "%s : setting rx_urb_size with : %zu\n", __func__,
 831                   dev->rx_urb_size);
 832        return 0;
 833
 834out:
 835        return ret;
 836}
 837
 838static const struct driver_info sr9800_driver_info = {
 839        .description    = "CoreChip SR9800 USB 2.0 Ethernet",
 840        .bind           = sr9800_bind,
 841        .status         = sr_status,
 842        .link_reset     = sr9800_link_reset,
 843        .reset          = sr9800_reset,
 844        .flags          = DRIVER_FLAG,
 845        .rx_fixup       = sr_rx_fixup,
 846        .tx_fixup       = sr_tx_fixup,
 847};
 848
 849static const struct usb_device_id       products[] = {
 850        {
 851                USB_DEVICE(0x0fe6, 0x9800),     /* SR9800 Device  */
 852                .driver_info = (unsigned long) &sr9800_driver_info,
 853        },
 854        {},             /* END */
 855};
 856
 857MODULE_DEVICE_TABLE(usb, products);
 858
 859static struct usb_driver sr_driver = {
 860        .name           = DRIVER_NAME,
 861        .id_table       = products,
 862        .probe          = usbnet_probe,
 863        .suspend        = usbnet_suspend,
 864        .resume         = usbnet_resume,
 865        .disconnect     = usbnet_disconnect,
 866        .supports_autosuspend = 1,
 867};
 868
 869module_usb_driver(sr_driver);
 870
 871MODULE_AUTHOR("Liu Junliang <liujunliang_ljl@163.com");
 872MODULE_VERSION(DRIVER_VERSION);
 873MODULE_DESCRIPTION("SR9800 USB 2.0 USB2NET Dev : http://www.corechip-sz.com");
 874MODULE_LICENSE("GPL");
 875
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