Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * |
| 3 | * Copyright (C) 2007,2008 SMSC |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | * |
| 19 | *************************************************************************** |
| 20 | */ |
| 21 | |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/phy.h> |
| 25 | #include <linux/pci.h> |
| 26 | #include <linux/if_vlan.h> |
| 27 | #include <linux/dma-mapping.h> |
| 28 | #include <linux/crc32.h> |
| 29 | #include <asm/unaligned.h> |
| 30 | #include "smsc9420.h" |
| 31 | |
| 32 | #define DRV_NAME "smsc9420" |
| 33 | #define PFX DRV_NAME ": " |
| 34 | #define DRV_MDIONAME "smsc9420-mdio" |
| 35 | #define DRV_DESCRIPTION "SMSC LAN9420 driver" |
| 36 | #define DRV_VERSION "1.01" |
| 37 | |
| 38 | MODULE_LICENSE("GPL"); |
| 39 | MODULE_VERSION(DRV_VERSION); |
| 40 | |
| 41 | struct smsc9420_dma_desc { |
| 42 | u32 status; |
| 43 | u32 length; |
| 44 | u32 buffer1; |
| 45 | u32 buffer2; |
| 46 | }; |
| 47 | |
| 48 | struct smsc9420_ring_info { |
| 49 | struct sk_buff *skb; |
| 50 | dma_addr_t mapping; |
| 51 | }; |
| 52 | |
| 53 | struct smsc9420_pdata { |
| 54 | void __iomem *base_addr; |
| 55 | struct pci_dev *pdev; |
| 56 | struct net_device *dev; |
| 57 | |
| 58 | struct smsc9420_dma_desc *rx_ring; |
| 59 | struct smsc9420_dma_desc *tx_ring; |
| 60 | struct smsc9420_ring_info *tx_buffers; |
| 61 | struct smsc9420_ring_info *rx_buffers; |
| 62 | dma_addr_t rx_dma_addr; |
| 63 | dma_addr_t tx_dma_addr; |
| 64 | int tx_ring_head, tx_ring_tail; |
| 65 | int rx_ring_head, rx_ring_tail; |
| 66 | |
| 67 | spinlock_t int_lock; |
| 68 | spinlock_t phy_lock; |
| 69 | |
| 70 | struct napi_struct napi; |
| 71 | |
| 72 | bool software_irq_signal; |
| 73 | bool rx_csum; |
| 74 | u32 msg_enable; |
| 75 | |
| 76 | struct phy_device *phy_dev; |
| 77 | struct mii_bus *mii_bus; |
| 78 | int phy_irq[PHY_MAX_ADDR]; |
| 79 | int last_duplex; |
| 80 | int last_carrier; |
| 81 | }; |
| 82 | |
| 83 | static const struct pci_device_id smsc9420_id_table[] = { |
| 84 | { PCI_VENDOR_ID_9420, PCI_DEVICE_ID_9420, PCI_ANY_ID, PCI_ANY_ID, }, |
| 85 | { 0, } |
| 86 | }; |
| 87 | |
| 88 | MODULE_DEVICE_TABLE(pci, smsc9420_id_table); |
| 89 | |
| 90 | #define SMSC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) |
| 91 | |
| 92 | static uint smsc_debug; |
| 93 | static uint debug = -1; |
| 94 | module_param(debug, uint, 0); |
| 95 | MODULE_PARM_DESC(debug, "debug level"); |
| 96 | |
| 97 | #define smsc_dbg(TYPE, f, a...) \ |
| 98 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 99 | printk(KERN_DEBUG PFX f "\n", ## a); \ |
| 100 | } while (0) |
| 101 | |
| 102 | #define smsc_info(TYPE, f, a...) \ |
| 103 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 104 | printk(KERN_INFO PFX f "\n", ## a); \ |
| 105 | } while (0) |
| 106 | |
| 107 | #define smsc_warn(TYPE, f, a...) \ |
| 108 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 109 | printk(KERN_WARNING PFX f "\n", ## a); \ |
| 110 | } while (0) |
| 111 | |
| 112 | static inline u32 smsc9420_reg_read(struct smsc9420_pdata *pd, u32 offset) |
| 113 | { |
| 114 | return ioread32(pd->base_addr + offset); |
| 115 | } |
| 116 | |
| 117 | static inline void |
| 118 | smsc9420_reg_write(struct smsc9420_pdata *pd, u32 offset, u32 value) |
| 119 | { |
| 120 | iowrite32(value, pd->base_addr + offset); |
| 121 | } |
| 122 | |
| 123 | static inline void smsc9420_pci_flush_write(struct smsc9420_pdata *pd) |
| 124 | { |
| 125 | /* to ensure PCI write completion, we must perform a PCI read */ |
| 126 | smsc9420_reg_read(pd, ID_REV); |
| 127 | } |
| 128 | |
| 129 | static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx) |
| 130 | { |
| 131 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; |
| 132 | unsigned long flags; |
| 133 | u32 addr; |
| 134 | int i, reg = -EIO; |
| 135 | |
| 136 | spin_lock_irqsave(&pd->phy_lock, flags); |
| 137 | |
| 138 | /* confirm MII not busy */ |
| 139 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { |
| 140 | smsc_warn(DRV, "MII is busy???"); |
| 141 | goto out; |
| 142 | } |
| 143 | |
| 144 | /* set the address, index & direction (read from PHY) */ |
| 145 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | |
| 146 | MII_ACCESS_MII_READ_; |
| 147 | smsc9420_reg_write(pd, MII_ACCESS, addr); |
| 148 | |
| 149 | /* wait for read to complete with 50us timeout */ |
| 150 | for (i = 0; i < 5; i++) { |
| 151 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & |
| 152 | MII_ACCESS_MII_BUSY_)) { |
| 153 | reg = (u16)smsc9420_reg_read(pd, MII_DATA); |
| 154 | goto out; |
| 155 | } |
| 156 | udelay(10); |
| 157 | } |
| 158 | |
| 159 | smsc_warn(DRV, "MII busy timeout!"); |
| 160 | |
| 161 | out: |
| 162 | spin_unlock_irqrestore(&pd->phy_lock, flags); |
| 163 | return reg; |
| 164 | } |
| 165 | |
| 166 | static int smsc9420_mii_write(struct mii_bus *bus, int phyaddr, int regidx, |
| 167 | u16 val) |
| 168 | { |
| 169 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; |
| 170 | unsigned long flags; |
| 171 | u32 addr; |
| 172 | int i, reg = -EIO; |
| 173 | |
| 174 | spin_lock_irqsave(&pd->phy_lock, flags); |
| 175 | |
| 176 | /* confirm MII not busy */ |
| 177 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { |
| 178 | smsc_warn(DRV, "MII is busy???"); |
| 179 | goto out; |
| 180 | } |
| 181 | |
| 182 | /* put the data to write in the MAC */ |
| 183 | smsc9420_reg_write(pd, MII_DATA, (u32)val); |
| 184 | |
| 185 | /* set the address, index & direction (write to PHY) */ |
| 186 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | |
| 187 | MII_ACCESS_MII_WRITE_; |
| 188 | smsc9420_reg_write(pd, MII_ACCESS, addr); |
| 189 | |
| 190 | /* wait for write to complete with 50us timeout */ |
| 191 | for (i = 0; i < 5; i++) { |
| 192 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & |
| 193 | MII_ACCESS_MII_BUSY_)) { |
| 194 | reg = 0; |
| 195 | goto out; |
| 196 | } |
| 197 | udelay(10); |
| 198 | } |
| 199 | |
| 200 | smsc_warn(DRV, "MII busy timeout!"); |
| 201 | |
| 202 | out: |
| 203 | spin_unlock_irqrestore(&pd->phy_lock, flags); |
| 204 | return reg; |
| 205 | } |
| 206 | |
| 207 | /* Returns hash bit number for given MAC address |
| 208 | * Example: |
| 209 | * 01 00 5E 00 00 01 -> returns bit number 31 */ |
| 210 | static u32 smsc9420_hash(u8 addr[ETH_ALEN]) |
| 211 | { |
| 212 | return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; |
| 213 | } |
| 214 | |
| 215 | static int smsc9420_eeprom_reload(struct smsc9420_pdata *pd) |
| 216 | { |
| 217 | int timeout = 100000; |
| 218 | |
| 219 | BUG_ON(!pd); |
| 220 | |
| 221 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { |
| 222 | smsc_dbg(DRV, "smsc9420_eeprom_reload: Eeprom busy"); |
| 223 | return -EIO; |
| 224 | } |
| 225 | |
| 226 | smsc9420_reg_write(pd, E2P_CMD, |
| 227 | (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_)); |
| 228 | |
| 229 | do { |
| 230 | udelay(10); |
| 231 | if (!(smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_)) |
| 232 | return 0; |
| 233 | } while (timeout--); |
| 234 | |
| 235 | smsc_warn(DRV, "smsc9420_eeprom_reload: Eeprom timed out"); |
| 236 | return -EIO; |
| 237 | } |
| 238 | |
| 239 | /* Standard ioctls for mii-tool */ |
| 240 | static int smsc9420_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 241 | { |
| 242 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 243 | |
| 244 | if (!netif_running(dev) || !pd->phy_dev) |
| 245 | return -EINVAL; |
| 246 | |
| 247 | return phy_mii_ioctl(pd->phy_dev, if_mii(ifr), cmd); |
| 248 | } |
| 249 | |
| 250 | static int smsc9420_ethtool_get_settings(struct net_device *dev, |
| 251 | struct ethtool_cmd *cmd) |
| 252 | { |
| 253 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 254 | |
| 255 | cmd->maxtxpkt = 1; |
| 256 | cmd->maxrxpkt = 1; |
| 257 | return phy_ethtool_gset(pd->phy_dev, cmd); |
| 258 | } |
| 259 | |
| 260 | static int smsc9420_ethtool_set_settings(struct net_device *dev, |
| 261 | struct ethtool_cmd *cmd) |
| 262 | { |
| 263 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 264 | |
| 265 | return phy_ethtool_sset(pd->phy_dev, cmd); |
| 266 | } |
| 267 | |
| 268 | static void smsc9420_ethtool_get_drvinfo(struct net_device *netdev, |
| 269 | struct ethtool_drvinfo *drvinfo) |
| 270 | { |
| 271 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 272 | |
| 273 | strcpy(drvinfo->driver, DRV_NAME); |
| 274 | strcpy(drvinfo->bus_info, pci_name(pd->pdev)); |
| 275 | strcpy(drvinfo->version, DRV_VERSION); |
| 276 | } |
| 277 | |
| 278 | static u32 smsc9420_ethtool_get_msglevel(struct net_device *netdev) |
| 279 | { |
| 280 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 281 | return pd->msg_enable; |
| 282 | } |
| 283 | |
| 284 | static void smsc9420_ethtool_set_msglevel(struct net_device *netdev, u32 data) |
| 285 | { |
| 286 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 287 | pd->msg_enable = data; |
| 288 | } |
| 289 | |
| 290 | static int smsc9420_ethtool_nway_reset(struct net_device *netdev) |
| 291 | { |
| 292 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 293 | return phy_start_aneg(pd->phy_dev); |
| 294 | } |
| 295 | |
Steve Glendinning | a7276db | 2008-12-15 00:59:47 -0800 | [diff] [blame] | 296 | static int smsc9420_ethtool_getregslen(struct net_device *dev) |
| 297 | { |
| 298 | /* all smsc9420 registers plus all phy registers */ |
| 299 | return 0x100 + (32 * sizeof(u32)); |
| 300 | } |
| 301 | |
| 302 | static void |
| 303 | smsc9420_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, |
| 304 | void *buf) |
| 305 | { |
| 306 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 307 | struct phy_device *phy_dev = pd->phy_dev; |
| 308 | unsigned int i, j = 0; |
| 309 | u32 *data = buf; |
| 310 | |
| 311 | regs->version = smsc9420_reg_read(pd, ID_REV); |
| 312 | for (i = 0; i < 0x100; i += (sizeof(u32))) |
| 313 | data[j++] = smsc9420_reg_read(pd, i); |
| 314 | |
| 315 | for (i = 0; i <= 31; i++) |
| 316 | data[j++] = smsc9420_mii_read(phy_dev->bus, phy_dev->addr, i); |
| 317 | } |
| 318 | |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 319 | static void smsc9420_eeprom_enable_access(struct smsc9420_pdata *pd) |
| 320 | { |
| 321 | unsigned int temp = smsc9420_reg_read(pd, GPIO_CFG); |
| 322 | temp &= ~GPIO_CFG_EEPR_EN_; |
| 323 | smsc9420_reg_write(pd, GPIO_CFG, temp); |
| 324 | msleep(1); |
| 325 | } |
| 326 | |
| 327 | static int smsc9420_eeprom_send_cmd(struct smsc9420_pdata *pd, u32 op) |
| 328 | { |
| 329 | int timeout = 100; |
| 330 | u32 e2cmd; |
| 331 | |
| 332 | smsc_dbg(HW, "op 0x%08x", op); |
| 333 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { |
| 334 | smsc_warn(HW, "Busy at start"); |
| 335 | return -EBUSY; |
| 336 | } |
| 337 | |
| 338 | e2cmd = op | E2P_CMD_EPC_BUSY_; |
| 339 | smsc9420_reg_write(pd, E2P_CMD, e2cmd); |
| 340 | |
| 341 | do { |
| 342 | msleep(1); |
| 343 | e2cmd = smsc9420_reg_read(pd, E2P_CMD); |
| 344 | } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (timeout--)); |
| 345 | |
| 346 | if (!timeout) { |
| 347 | smsc_info(HW, "TIMED OUT"); |
| 348 | return -EAGAIN; |
| 349 | } |
| 350 | |
| 351 | if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { |
| 352 | smsc_info(HW, "Error occured during eeprom operation"); |
| 353 | return -EINVAL; |
| 354 | } |
| 355 | |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static int smsc9420_eeprom_read_location(struct smsc9420_pdata *pd, |
| 360 | u8 address, u8 *data) |
| 361 | { |
| 362 | u32 op = E2P_CMD_EPC_CMD_READ_ | address; |
| 363 | int ret; |
| 364 | |
| 365 | smsc_dbg(HW, "address 0x%x", address); |
| 366 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 367 | |
| 368 | if (!ret) |
| 369 | data[address] = smsc9420_reg_read(pd, E2P_DATA); |
| 370 | |
| 371 | return ret; |
| 372 | } |
| 373 | |
| 374 | static int smsc9420_eeprom_write_location(struct smsc9420_pdata *pd, |
| 375 | u8 address, u8 data) |
| 376 | { |
| 377 | u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; |
| 378 | int ret; |
| 379 | |
| 380 | smsc_dbg(HW, "address 0x%x, data 0x%x", address, data); |
| 381 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 382 | |
| 383 | if (!ret) { |
| 384 | op = E2P_CMD_EPC_CMD_WRITE_ | address; |
| 385 | smsc9420_reg_write(pd, E2P_DATA, (u32)data); |
| 386 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 387 | } |
| 388 | |
| 389 | return ret; |
| 390 | } |
| 391 | |
| 392 | static int smsc9420_ethtool_get_eeprom_len(struct net_device *dev) |
| 393 | { |
| 394 | return SMSC9420_EEPROM_SIZE; |
| 395 | } |
| 396 | |
| 397 | static int smsc9420_ethtool_get_eeprom(struct net_device *dev, |
| 398 | struct ethtool_eeprom *eeprom, u8 *data) |
| 399 | { |
| 400 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 401 | u8 eeprom_data[SMSC9420_EEPROM_SIZE]; |
| 402 | int len, i; |
| 403 | |
| 404 | smsc9420_eeprom_enable_access(pd); |
| 405 | |
| 406 | len = min(eeprom->len, SMSC9420_EEPROM_SIZE); |
| 407 | for (i = 0; i < len; i++) { |
| 408 | int ret = smsc9420_eeprom_read_location(pd, i, eeprom_data); |
| 409 | if (ret < 0) { |
| 410 | eeprom->len = 0; |
| 411 | return ret; |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | memcpy(data, &eeprom_data[eeprom->offset], len); |
| 416 | eeprom->len = len; |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static int smsc9420_ethtool_set_eeprom(struct net_device *dev, |
| 421 | struct ethtool_eeprom *eeprom, u8 *data) |
| 422 | { |
| 423 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 424 | int ret; |
| 425 | |
| 426 | smsc9420_eeprom_enable_access(pd); |
| 427 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_); |
| 428 | ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data); |
| 429 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWDS_); |
| 430 | |
| 431 | /* Single byte write, according to man page */ |
| 432 | eeprom->len = 1; |
| 433 | |
| 434 | return ret; |
| 435 | } |
| 436 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 437 | static const struct ethtool_ops smsc9420_ethtool_ops = { |
| 438 | .get_settings = smsc9420_ethtool_get_settings, |
| 439 | .set_settings = smsc9420_ethtool_set_settings, |
| 440 | .get_drvinfo = smsc9420_ethtool_get_drvinfo, |
| 441 | .get_msglevel = smsc9420_ethtool_get_msglevel, |
| 442 | .set_msglevel = smsc9420_ethtool_set_msglevel, |
| 443 | .nway_reset = smsc9420_ethtool_nway_reset, |
| 444 | .get_link = ethtool_op_get_link, |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 445 | .get_eeprom_len = smsc9420_ethtool_get_eeprom_len, |
| 446 | .get_eeprom = smsc9420_ethtool_get_eeprom, |
| 447 | .set_eeprom = smsc9420_ethtool_set_eeprom, |
Steve Glendinning | a7276db | 2008-12-15 00:59:47 -0800 | [diff] [blame] | 448 | .get_regs_len = smsc9420_ethtool_getregslen, |
| 449 | .get_regs = smsc9420_ethtool_getregs, |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 450 | }; |
| 451 | |
| 452 | /* Sets the device MAC address to dev_addr */ |
| 453 | static void smsc9420_set_mac_address(struct net_device *dev) |
| 454 | { |
| 455 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 456 | u8 *dev_addr = dev->dev_addr; |
| 457 | u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; |
| 458 | u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | |
| 459 | (dev_addr[1] << 8) | dev_addr[0]; |
| 460 | |
| 461 | smsc9420_reg_write(pd, ADDRH, mac_high16); |
| 462 | smsc9420_reg_write(pd, ADDRL, mac_low32); |
| 463 | } |
| 464 | |
| 465 | static void smsc9420_check_mac_address(struct net_device *dev) |
| 466 | { |
| 467 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 468 | |
| 469 | /* Check if mac address has been specified when bringing interface up */ |
| 470 | if (is_valid_ether_addr(dev->dev_addr)) { |
| 471 | smsc9420_set_mac_address(dev); |
| 472 | smsc_dbg(PROBE, "MAC Address is specified by configuration"); |
| 473 | } else { |
| 474 | /* Try reading mac address from device. if EEPROM is present |
| 475 | * it will already have been set */ |
| 476 | u32 mac_high16 = smsc9420_reg_read(pd, ADDRH); |
| 477 | u32 mac_low32 = smsc9420_reg_read(pd, ADDRL); |
| 478 | dev->dev_addr[0] = (u8)(mac_low32); |
| 479 | dev->dev_addr[1] = (u8)(mac_low32 >> 8); |
| 480 | dev->dev_addr[2] = (u8)(mac_low32 >> 16); |
| 481 | dev->dev_addr[3] = (u8)(mac_low32 >> 24); |
| 482 | dev->dev_addr[4] = (u8)(mac_high16); |
| 483 | dev->dev_addr[5] = (u8)(mac_high16 >> 8); |
| 484 | |
| 485 | if (is_valid_ether_addr(dev->dev_addr)) { |
| 486 | /* eeprom values are valid so use them */ |
| 487 | smsc_dbg(PROBE, "Mac Address is read from EEPROM"); |
| 488 | } else { |
| 489 | /* eeprom values are invalid, generate random MAC */ |
| 490 | random_ether_addr(dev->dev_addr); |
| 491 | smsc9420_set_mac_address(dev); |
| 492 | smsc_dbg(PROBE, |
| 493 | "MAC Address is set to random_ether_addr"); |
| 494 | } |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | static void smsc9420_stop_tx(struct smsc9420_pdata *pd) |
| 499 | { |
| 500 | u32 dmac_control, mac_cr, dma_intr_ena; |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 501 | int timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 502 | |
| 503 | /* disable TX DMAC */ |
| 504 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 505 | dmac_control &= (~DMAC_CONTROL_ST_); |
| 506 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 507 | |
| 508 | /* Wait max 10ms for transmit process to stop */ |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 509 | while (--timeout) { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 510 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_TS_) |
| 511 | break; |
| 512 | udelay(10); |
| 513 | } |
| 514 | |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 515 | if (!timeout) |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 516 | smsc_warn(IFDOWN, "TX DMAC failed to stop"); |
| 517 | |
| 518 | /* ACK Tx DMAC stop bit */ |
| 519 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_TXPS_); |
| 520 | |
| 521 | /* mask TX DMAC interrupts */ |
| 522 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 523 | dma_intr_ena &= ~(DMAC_INTR_ENA_TX_); |
| 524 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 525 | smsc9420_pci_flush_write(pd); |
| 526 | |
| 527 | /* stop MAC TX */ |
| 528 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_TXEN_); |
| 529 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 530 | smsc9420_pci_flush_write(pd); |
| 531 | } |
| 532 | |
| 533 | static void smsc9420_free_tx_ring(struct smsc9420_pdata *pd) |
| 534 | { |
| 535 | int i; |
| 536 | |
| 537 | BUG_ON(!pd->tx_ring); |
| 538 | |
| 539 | if (!pd->tx_buffers) |
| 540 | return; |
| 541 | |
| 542 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 543 | struct sk_buff *skb = pd->tx_buffers[i].skb; |
| 544 | |
| 545 | if (skb) { |
| 546 | BUG_ON(!pd->tx_buffers[i].mapping); |
| 547 | pci_unmap_single(pd->pdev, pd->tx_buffers[i].mapping, |
| 548 | skb->len, PCI_DMA_TODEVICE); |
| 549 | dev_kfree_skb_any(skb); |
| 550 | } |
| 551 | |
| 552 | pd->tx_ring[i].status = 0; |
| 553 | pd->tx_ring[i].length = 0; |
| 554 | pd->tx_ring[i].buffer1 = 0; |
| 555 | pd->tx_ring[i].buffer2 = 0; |
| 556 | } |
| 557 | wmb(); |
| 558 | |
| 559 | kfree(pd->tx_buffers); |
| 560 | pd->tx_buffers = NULL; |
| 561 | |
| 562 | pd->tx_ring_head = 0; |
| 563 | pd->tx_ring_tail = 0; |
| 564 | } |
| 565 | |
| 566 | static void smsc9420_free_rx_ring(struct smsc9420_pdata *pd) |
| 567 | { |
| 568 | int i; |
| 569 | |
| 570 | BUG_ON(!pd->rx_ring); |
| 571 | |
| 572 | if (!pd->rx_buffers) |
| 573 | return; |
| 574 | |
| 575 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 576 | if (pd->rx_buffers[i].skb) |
| 577 | dev_kfree_skb_any(pd->rx_buffers[i].skb); |
| 578 | |
| 579 | if (pd->rx_buffers[i].mapping) |
| 580 | pci_unmap_single(pd->pdev, pd->rx_buffers[i].mapping, |
| 581 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 582 | |
| 583 | pd->rx_ring[i].status = 0; |
| 584 | pd->rx_ring[i].length = 0; |
| 585 | pd->rx_ring[i].buffer1 = 0; |
| 586 | pd->rx_ring[i].buffer2 = 0; |
| 587 | } |
| 588 | wmb(); |
| 589 | |
| 590 | kfree(pd->rx_buffers); |
| 591 | pd->rx_buffers = NULL; |
| 592 | |
| 593 | pd->rx_ring_head = 0; |
| 594 | pd->rx_ring_tail = 0; |
| 595 | } |
| 596 | |
| 597 | static void smsc9420_stop_rx(struct smsc9420_pdata *pd) |
| 598 | { |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 599 | int timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 600 | u32 mac_cr, dmac_control, dma_intr_ena; |
| 601 | |
| 602 | /* mask RX DMAC interrupts */ |
| 603 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 604 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); |
| 605 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 606 | smsc9420_pci_flush_write(pd); |
| 607 | |
| 608 | /* stop RX MAC prior to stoping DMA */ |
| 609 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_RXEN_); |
| 610 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 611 | smsc9420_pci_flush_write(pd); |
| 612 | |
| 613 | /* stop RX DMAC */ |
| 614 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 615 | dmac_control &= (~DMAC_CONTROL_SR_); |
| 616 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 617 | smsc9420_pci_flush_write(pd); |
| 618 | |
| 619 | /* wait up to 10ms for receive to stop */ |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 620 | while (--timeout) { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 621 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_RS_) |
| 622 | break; |
| 623 | udelay(10); |
| 624 | } |
| 625 | |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 626 | if (!timeout) |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 627 | smsc_warn(IFDOWN, "RX DMAC did not stop! timeout."); |
| 628 | |
| 629 | /* ACK the Rx DMAC stop bit */ |
| 630 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_RXPS_); |
| 631 | } |
| 632 | |
| 633 | static irqreturn_t smsc9420_isr(int irq, void *dev_id) |
| 634 | { |
| 635 | struct smsc9420_pdata *pd = dev_id; |
| 636 | u32 int_cfg, int_sts, int_ctl; |
| 637 | irqreturn_t ret = IRQ_NONE; |
| 638 | ulong flags; |
| 639 | |
| 640 | BUG_ON(!pd); |
| 641 | BUG_ON(!pd->base_addr); |
| 642 | |
| 643 | int_cfg = smsc9420_reg_read(pd, INT_CFG); |
| 644 | |
| 645 | /* check if it's our interrupt */ |
| 646 | if ((int_cfg & (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) != |
| 647 | (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) |
| 648 | return IRQ_NONE; |
| 649 | |
| 650 | int_sts = smsc9420_reg_read(pd, INT_STAT); |
| 651 | |
| 652 | if (likely(INT_STAT_DMAC_INT_ & int_sts)) { |
| 653 | u32 status = smsc9420_reg_read(pd, DMAC_STATUS); |
| 654 | u32 ints_to_clear = 0; |
| 655 | |
| 656 | if (status & DMAC_STS_TX_) { |
| 657 | ints_to_clear |= (DMAC_STS_TX_ | DMAC_STS_NIS_); |
| 658 | netif_wake_queue(pd->dev); |
| 659 | } |
| 660 | |
| 661 | if (status & DMAC_STS_RX_) { |
| 662 | /* mask RX DMAC interrupts */ |
| 663 | u32 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 664 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); |
| 665 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 666 | smsc9420_pci_flush_write(pd); |
| 667 | |
| 668 | ints_to_clear |= (DMAC_STS_RX_ | DMAC_STS_NIS_); |
Neil Horman | 908a7a1 | 2008-12-22 20:43:12 -0800 | [diff] [blame] | 669 | netif_rx_schedule(&pd->napi); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | if (ints_to_clear) |
| 673 | smsc9420_reg_write(pd, DMAC_STATUS, ints_to_clear); |
| 674 | |
| 675 | ret = IRQ_HANDLED; |
| 676 | } |
| 677 | |
| 678 | if (unlikely(INT_STAT_SW_INT_ & int_sts)) { |
| 679 | /* mask software interrupt */ |
| 680 | spin_lock_irqsave(&pd->int_lock, flags); |
| 681 | int_ctl = smsc9420_reg_read(pd, INT_CTL); |
| 682 | int_ctl &= (~INT_CTL_SW_INT_EN_); |
| 683 | smsc9420_reg_write(pd, INT_CTL, int_ctl); |
| 684 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 685 | |
| 686 | smsc9420_reg_write(pd, INT_STAT, INT_STAT_SW_INT_); |
| 687 | pd->software_irq_signal = true; |
| 688 | smp_wmb(); |
| 689 | |
| 690 | ret = IRQ_HANDLED; |
| 691 | } |
| 692 | |
| 693 | /* to ensure PCI write completion, we must perform a PCI read */ |
| 694 | smsc9420_pci_flush_write(pd); |
| 695 | |
| 696 | return ret; |
| 697 | } |
| 698 | |
Steve Glendinning | e312674 | 2008-12-12 22:31:50 -0800 | [diff] [blame] | 699 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 700 | static void smsc9420_poll_controller(struct net_device *dev) |
| 701 | { |
| 702 | disable_irq(dev->irq); |
| 703 | smsc9420_isr(0, dev); |
| 704 | enable_irq(dev->irq); |
| 705 | } |
| 706 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| 707 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 708 | static void smsc9420_dmac_soft_reset(struct smsc9420_pdata *pd) |
| 709 | { |
| 710 | smsc9420_reg_write(pd, BUS_MODE, BUS_MODE_SWR_); |
| 711 | smsc9420_reg_read(pd, BUS_MODE); |
| 712 | udelay(2); |
| 713 | if (smsc9420_reg_read(pd, BUS_MODE) & BUS_MODE_SWR_) |
| 714 | smsc_warn(DRV, "Software reset not cleared"); |
| 715 | } |
| 716 | |
| 717 | static int smsc9420_stop(struct net_device *dev) |
| 718 | { |
| 719 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 720 | u32 int_cfg; |
| 721 | ulong flags; |
| 722 | |
| 723 | BUG_ON(!pd); |
| 724 | BUG_ON(!pd->phy_dev); |
| 725 | |
| 726 | /* disable master interrupt */ |
| 727 | spin_lock_irqsave(&pd->int_lock, flags); |
| 728 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 729 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 730 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 731 | |
| 732 | netif_tx_disable(dev); |
| 733 | napi_disable(&pd->napi); |
| 734 | |
| 735 | smsc9420_stop_tx(pd); |
| 736 | smsc9420_free_tx_ring(pd); |
| 737 | |
| 738 | smsc9420_stop_rx(pd); |
| 739 | smsc9420_free_rx_ring(pd); |
| 740 | |
| 741 | free_irq(dev->irq, pd); |
| 742 | |
| 743 | smsc9420_dmac_soft_reset(pd); |
| 744 | |
| 745 | phy_stop(pd->phy_dev); |
| 746 | |
| 747 | phy_disconnect(pd->phy_dev); |
| 748 | pd->phy_dev = NULL; |
| 749 | mdiobus_unregister(pd->mii_bus); |
| 750 | mdiobus_free(pd->mii_bus); |
| 751 | |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | static void smsc9420_rx_count_stats(struct net_device *dev, u32 desc_status) |
| 756 | { |
| 757 | if (unlikely(desc_status & RDES0_ERROR_SUMMARY_)) { |
| 758 | dev->stats.rx_errors++; |
| 759 | if (desc_status & RDES0_DESCRIPTOR_ERROR_) |
| 760 | dev->stats.rx_over_errors++; |
| 761 | else if (desc_status & (RDES0_FRAME_TOO_LONG_ | |
| 762 | RDES0_RUNT_FRAME_ | RDES0_COLLISION_SEEN_)) |
| 763 | dev->stats.rx_frame_errors++; |
| 764 | else if (desc_status & RDES0_CRC_ERROR_) |
| 765 | dev->stats.rx_crc_errors++; |
| 766 | } |
| 767 | |
| 768 | if (unlikely(desc_status & RDES0_LENGTH_ERROR_)) |
| 769 | dev->stats.rx_length_errors++; |
| 770 | |
| 771 | if (unlikely(!((desc_status & RDES0_LAST_DESCRIPTOR_) && |
| 772 | (desc_status & RDES0_FIRST_DESCRIPTOR_)))) |
| 773 | dev->stats.rx_length_errors++; |
| 774 | |
| 775 | if (desc_status & RDES0_MULTICAST_FRAME_) |
| 776 | dev->stats.multicast++; |
| 777 | } |
| 778 | |
| 779 | static void smsc9420_rx_handoff(struct smsc9420_pdata *pd, const int index, |
| 780 | const u32 status) |
| 781 | { |
| 782 | struct net_device *dev = pd->dev; |
| 783 | struct sk_buff *skb; |
| 784 | u16 packet_length = (status & RDES0_FRAME_LENGTH_MASK_) |
| 785 | >> RDES0_FRAME_LENGTH_SHFT_; |
| 786 | |
| 787 | /* remove crc from packet lendth */ |
| 788 | packet_length -= 4; |
| 789 | |
| 790 | if (pd->rx_csum) |
| 791 | packet_length -= 2; |
| 792 | |
| 793 | dev->stats.rx_packets++; |
| 794 | dev->stats.rx_bytes += packet_length; |
| 795 | |
| 796 | pci_unmap_single(pd->pdev, pd->rx_buffers[index].mapping, |
| 797 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 798 | pd->rx_buffers[index].mapping = 0; |
| 799 | |
| 800 | skb = pd->rx_buffers[index].skb; |
| 801 | pd->rx_buffers[index].skb = NULL; |
| 802 | |
| 803 | if (pd->rx_csum) { |
| 804 | u16 hw_csum = get_unaligned_le16(skb_tail_pointer(skb) + |
| 805 | NET_IP_ALIGN + packet_length + 4); |
| 806 | put_unaligned_le16(cpu_to_le16(hw_csum), &skb->csum); |
| 807 | skb->ip_summed = CHECKSUM_COMPLETE; |
| 808 | } |
| 809 | |
| 810 | skb_reserve(skb, NET_IP_ALIGN); |
| 811 | skb_put(skb, packet_length); |
| 812 | |
| 813 | skb->protocol = eth_type_trans(skb, dev); |
| 814 | |
| 815 | netif_receive_skb(skb); |
| 816 | dev->last_rx = jiffies; |
| 817 | } |
| 818 | |
| 819 | static int smsc9420_alloc_rx_buffer(struct smsc9420_pdata *pd, int index) |
| 820 | { |
| 821 | struct sk_buff *skb = netdev_alloc_skb(pd->dev, PKT_BUF_SZ); |
| 822 | dma_addr_t mapping; |
| 823 | |
| 824 | BUG_ON(pd->rx_buffers[index].skb); |
| 825 | BUG_ON(pd->rx_buffers[index].mapping); |
| 826 | |
| 827 | if (unlikely(!skb)) { |
| 828 | smsc_warn(RX_ERR, "Failed to allocate new skb!"); |
| 829 | return -ENOMEM; |
| 830 | } |
| 831 | |
| 832 | skb->dev = pd->dev; |
| 833 | |
| 834 | mapping = pci_map_single(pd->pdev, skb_tail_pointer(skb), |
| 835 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 836 | if (pci_dma_mapping_error(pd->pdev, mapping)) { |
| 837 | dev_kfree_skb_any(skb); |
| 838 | smsc_warn(RX_ERR, "pci_map_single failed!"); |
| 839 | return -ENOMEM; |
| 840 | } |
| 841 | |
| 842 | pd->rx_buffers[index].skb = skb; |
| 843 | pd->rx_buffers[index].mapping = mapping; |
| 844 | pd->rx_ring[index].buffer1 = mapping + NET_IP_ALIGN; |
| 845 | pd->rx_ring[index].status = RDES0_OWN_; |
| 846 | wmb(); |
| 847 | |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | static void smsc9420_alloc_new_rx_buffers(struct smsc9420_pdata *pd) |
| 852 | { |
| 853 | while (pd->rx_ring_tail != pd->rx_ring_head) { |
| 854 | if (smsc9420_alloc_rx_buffer(pd, pd->rx_ring_tail)) |
| 855 | break; |
| 856 | |
| 857 | pd->rx_ring_tail = (pd->rx_ring_tail + 1) % RX_RING_SIZE; |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | static int smsc9420_rx_poll(struct napi_struct *napi, int budget) |
| 862 | { |
| 863 | struct smsc9420_pdata *pd = |
| 864 | container_of(napi, struct smsc9420_pdata, napi); |
| 865 | struct net_device *dev = pd->dev; |
| 866 | u32 drop_frame_cnt, dma_intr_ena, status; |
| 867 | int work_done; |
| 868 | |
| 869 | for (work_done = 0; work_done < budget; work_done++) { |
| 870 | rmb(); |
| 871 | status = pd->rx_ring[pd->rx_ring_head].status; |
| 872 | |
| 873 | /* stop if DMAC owns this dma descriptor */ |
| 874 | if (status & RDES0_OWN_) |
| 875 | break; |
| 876 | |
| 877 | smsc9420_rx_count_stats(dev, status); |
| 878 | smsc9420_rx_handoff(pd, pd->rx_ring_head, status); |
| 879 | pd->rx_ring_head = (pd->rx_ring_head + 1) % RX_RING_SIZE; |
| 880 | smsc9420_alloc_new_rx_buffers(pd); |
| 881 | } |
| 882 | |
| 883 | drop_frame_cnt = smsc9420_reg_read(pd, MISS_FRAME_CNTR); |
| 884 | dev->stats.rx_dropped += |
| 885 | (drop_frame_cnt & 0xFFFF) + ((drop_frame_cnt >> 17) & 0x3FF); |
| 886 | |
| 887 | /* Kick RXDMA */ |
| 888 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); |
| 889 | smsc9420_pci_flush_write(pd); |
| 890 | |
| 891 | if (work_done < budget) { |
Neil Horman | 908a7a1 | 2008-12-22 20:43:12 -0800 | [diff] [blame] | 892 | netif_rx_complete(&pd->napi); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 893 | |
| 894 | /* re-enable RX DMA interrupts */ |
| 895 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 896 | dma_intr_ena |= (DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); |
| 897 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 898 | smsc9420_pci_flush_write(pd); |
| 899 | } |
| 900 | return work_done; |
| 901 | } |
| 902 | |
| 903 | static void |
| 904 | smsc9420_tx_update_stats(struct net_device *dev, u32 status, u32 length) |
| 905 | { |
| 906 | if (unlikely(status & TDES0_ERROR_SUMMARY_)) { |
| 907 | dev->stats.tx_errors++; |
| 908 | if (status & (TDES0_EXCESSIVE_DEFERRAL_ | |
| 909 | TDES0_EXCESSIVE_COLLISIONS_)) |
| 910 | dev->stats.tx_aborted_errors++; |
| 911 | |
| 912 | if (status & (TDES0_LOSS_OF_CARRIER_ | TDES0_NO_CARRIER_)) |
| 913 | dev->stats.tx_carrier_errors++; |
| 914 | } else { |
| 915 | dev->stats.tx_packets++; |
| 916 | dev->stats.tx_bytes += (length & 0x7FF); |
| 917 | } |
| 918 | |
| 919 | if (unlikely(status & TDES0_EXCESSIVE_COLLISIONS_)) { |
| 920 | dev->stats.collisions += 16; |
| 921 | } else { |
| 922 | dev->stats.collisions += |
| 923 | (status & TDES0_COLLISION_COUNT_MASK_) >> |
| 924 | TDES0_COLLISION_COUNT_SHFT_; |
| 925 | } |
| 926 | |
| 927 | if (unlikely(status & TDES0_HEARTBEAT_FAIL_)) |
| 928 | dev->stats.tx_heartbeat_errors++; |
| 929 | } |
| 930 | |
| 931 | /* Check for completed dma transfers, update stats and free skbs */ |
| 932 | static void smsc9420_complete_tx(struct net_device *dev) |
| 933 | { |
| 934 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 935 | |
| 936 | while (pd->tx_ring_tail != pd->tx_ring_head) { |
| 937 | int index = pd->tx_ring_tail; |
| 938 | u32 status, length; |
| 939 | |
| 940 | rmb(); |
| 941 | status = pd->tx_ring[index].status; |
| 942 | length = pd->tx_ring[index].length; |
| 943 | |
| 944 | /* Check if DMA still owns this descriptor */ |
| 945 | if (unlikely(TDES0_OWN_ & status)) |
| 946 | break; |
| 947 | |
| 948 | smsc9420_tx_update_stats(dev, status, length); |
| 949 | |
| 950 | BUG_ON(!pd->tx_buffers[index].skb); |
| 951 | BUG_ON(!pd->tx_buffers[index].mapping); |
| 952 | |
| 953 | pci_unmap_single(pd->pdev, pd->tx_buffers[index].mapping, |
| 954 | pd->tx_buffers[index].skb->len, PCI_DMA_TODEVICE); |
| 955 | pd->tx_buffers[index].mapping = 0; |
| 956 | |
| 957 | dev_kfree_skb_any(pd->tx_buffers[index].skb); |
| 958 | pd->tx_buffers[index].skb = NULL; |
| 959 | |
| 960 | pd->tx_ring[index].buffer1 = 0; |
| 961 | wmb(); |
| 962 | |
| 963 | pd->tx_ring_tail = (pd->tx_ring_tail + 1) % TX_RING_SIZE; |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | static int smsc9420_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 968 | { |
| 969 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 970 | dma_addr_t mapping; |
| 971 | int index = pd->tx_ring_head; |
| 972 | u32 tmp_desc1; |
| 973 | bool about_to_take_last_desc = |
| 974 | (((pd->tx_ring_head + 2) % TX_RING_SIZE) == pd->tx_ring_tail); |
| 975 | |
| 976 | smsc9420_complete_tx(dev); |
| 977 | |
| 978 | rmb(); |
| 979 | BUG_ON(pd->tx_ring[index].status & TDES0_OWN_); |
| 980 | BUG_ON(pd->tx_buffers[index].skb); |
| 981 | BUG_ON(pd->tx_buffers[index].mapping); |
| 982 | |
| 983 | mapping = pci_map_single(pd->pdev, skb->data, |
| 984 | skb->len, PCI_DMA_TODEVICE); |
| 985 | if (pci_dma_mapping_error(pd->pdev, mapping)) { |
| 986 | smsc_warn(TX_ERR, "pci_map_single failed, dropping packet"); |
| 987 | return NETDEV_TX_BUSY; |
| 988 | } |
| 989 | |
| 990 | pd->tx_buffers[index].skb = skb; |
| 991 | pd->tx_buffers[index].mapping = mapping; |
| 992 | |
| 993 | tmp_desc1 = (TDES1_LS_ | ((u32)skb->len & 0x7FF)); |
| 994 | if (unlikely(about_to_take_last_desc)) { |
| 995 | tmp_desc1 |= TDES1_IC_; |
| 996 | netif_stop_queue(pd->dev); |
| 997 | } |
| 998 | |
| 999 | /* check if we are at the last descriptor and need to set EOR */ |
| 1000 | if (unlikely(index == (TX_RING_SIZE - 1))) |
| 1001 | tmp_desc1 |= TDES1_TER_; |
| 1002 | |
| 1003 | pd->tx_ring[index].buffer1 = mapping; |
| 1004 | pd->tx_ring[index].length = tmp_desc1; |
| 1005 | wmb(); |
| 1006 | |
| 1007 | /* increment head */ |
| 1008 | pd->tx_ring_head = (pd->tx_ring_head + 1) % TX_RING_SIZE; |
| 1009 | |
| 1010 | /* assign ownership to DMAC */ |
| 1011 | pd->tx_ring[index].status = TDES0_OWN_; |
| 1012 | wmb(); |
| 1013 | |
| 1014 | /* kick the DMA */ |
| 1015 | smsc9420_reg_write(pd, TX_POLL_DEMAND, 1); |
| 1016 | smsc9420_pci_flush_write(pd); |
| 1017 | |
| 1018 | dev->trans_start = jiffies; |
| 1019 | |
| 1020 | return NETDEV_TX_OK; |
| 1021 | } |
| 1022 | |
| 1023 | static struct net_device_stats *smsc9420_get_stats(struct net_device *dev) |
| 1024 | { |
| 1025 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1026 | u32 counter = smsc9420_reg_read(pd, MISS_FRAME_CNTR); |
| 1027 | dev->stats.rx_dropped += |
| 1028 | (counter & 0x0000FFFF) + ((counter >> 17) & 0x000003FF); |
| 1029 | return &dev->stats; |
| 1030 | } |
| 1031 | |
| 1032 | static void smsc9420_set_multicast_list(struct net_device *dev) |
| 1033 | { |
| 1034 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1035 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); |
| 1036 | |
| 1037 | if (dev->flags & IFF_PROMISC) { |
| 1038 | smsc_dbg(HW, "Promiscuous Mode Enabled"); |
| 1039 | mac_cr |= MAC_CR_PRMS_; |
| 1040 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1041 | mac_cr &= (~MAC_CR_HPFILT_); |
| 1042 | } else if (dev->flags & IFF_ALLMULTI) { |
| 1043 | smsc_dbg(HW, "Receive all Multicast Enabled"); |
| 1044 | mac_cr &= (~MAC_CR_PRMS_); |
| 1045 | mac_cr |= MAC_CR_MCPAS_; |
| 1046 | mac_cr &= (~MAC_CR_HPFILT_); |
| 1047 | } else if (dev->mc_count > 0) { |
| 1048 | struct dev_mc_list *mc_list = dev->mc_list; |
| 1049 | u32 hash_lo = 0, hash_hi = 0; |
| 1050 | |
| 1051 | smsc_dbg(HW, "Multicast filter enabled"); |
| 1052 | while (mc_list) { |
| 1053 | u32 bit_num = smsc9420_hash(mc_list->dmi_addr); |
| 1054 | u32 mask = 1 << (bit_num & 0x1F); |
| 1055 | |
| 1056 | if (bit_num & 0x20) |
| 1057 | hash_hi |= mask; |
| 1058 | else |
| 1059 | hash_lo |= mask; |
| 1060 | |
| 1061 | mc_list = mc_list->next; |
| 1062 | } |
| 1063 | smsc9420_reg_write(pd, HASHH, hash_hi); |
| 1064 | smsc9420_reg_write(pd, HASHL, hash_lo); |
| 1065 | |
| 1066 | mac_cr &= (~MAC_CR_PRMS_); |
| 1067 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1068 | mac_cr |= MAC_CR_HPFILT_; |
| 1069 | } else { |
| 1070 | smsc_dbg(HW, "Receive own packets only."); |
| 1071 | smsc9420_reg_write(pd, HASHH, 0); |
| 1072 | smsc9420_reg_write(pd, HASHL, 0); |
| 1073 | |
| 1074 | mac_cr &= (~MAC_CR_PRMS_); |
| 1075 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1076 | mac_cr &= (~MAC_CR_HPFILT_); |
| 1077 | } |
| 1078 | |
| 1079 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1080 | smsc9420_pci_flush_write(pd); |
| 1081 | } |
| 1082 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1083 | static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd) |
| 1084 | { |
| 1085 | struct phy_device *phy_dev = pd->phy_dev; |
| 1086 | u32 flow; |
| 1087 | |
| 1088 | if (phy_dev->duplex == DUPLEX_FULL) { |
| 1089 | u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); |
| 1090 | u16 rmtadv = phy_read(phy_dev, MII_LPA); |
Steve Glendinning | bc02ff9 | 2008-12-16 02:00:48 -0800 | [diff] [blame] | 1091 | u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1092 | |
| 1093 | if (cap & FLOW_CTRL_RX) |
| 1094 | flow = 0xFFFF0002; |
| 1095 | else |
| 1096 | flow = 0; |
| 1097 | |
| 1098 | smsc_info(LINK, "rx pause %s, tx pause %s", |
| 1099 | (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), |
| 1100 | (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); |
| 1101 | } else { |
| 1102 | smsc_info(LINK, "half duplex"); |
| 1103 | flow = 0; |
| 1104 | } |
| 1105 | |
| 1106 | smsc9420_reg_write(pd, FLOW, flow); |
| 1107 | } |
| 1108 | |
| 1109 | /* Update link mode if anything has changed. Called periodically when the |
| 1110 | * PHY is in polling mode, even if nothing has changed. */ |
| 1111 | static void smsc9420_phy_adjust_link(struct net_device *dev) |
| 1112 | { |
| 1113 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1114 | struct phy_device *phy_dev = pd->phy_dev; |
| 1115 | int carrier; |
| 1116 | |
| 1117 | if (phy_dev->duplex != pd->last_duplex) { |
| 1118 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); |
| 1119 | if (phy_dev->duplex) { |
| 1120 | smsc_dbg(LINK, "full duplex mode"); |
| 1121 | mac_cr |= MAC_CR_FDPX_; |
| 1122 | } else { |
| 1123 | smsc_dbg(LINK, "half duplex mode"); |
| 1124 | mac_cr &= ~MAC_CR_FDPX_; |
| 1125 | } |
| 1126 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1127 | |
| 1128 | smsc9420_phy_update_flowcontrol(pd); |
| 1129 | pd->last_duplex = phy_dev->duplex; |
| 1130 | } |
| 1131 | |
| 1132 | carrier = netif_carrier_ok(dev); |
| 1133 | if (carrier != pd->last_carrier) { |
| 1134 | if (carrier) |
| 1135 | smsc_dbg(LINK, "carrier OK"); |
| 1136 | else |
| 1137 | smsc_dbg(LINK, "no carrier"); |
| 1138 | pd->last_carrier = carrier; |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | static int smsc9420_mii_probe(struct net_device *dev) |
| 1143 | { |
| 1144 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1145 | struct phy_device *phydev = NULL; |
| 1146 | |
| 1147 | BUG_ON(pd->phy_dev); |
| 1148 | |
| 1149 | /* Device only supports internal PHY at address 1 */ |
| 1150 | if (!pd->mii_bus->phy_map[1]) { |
| 1151 | pr_err("%s: no PHY found at address 1\n", dev->name); |
| 1152 | return -ENODEV; |
| 1153 | } |
| 1154 | |
| 1155 | phydev = pd->mii_bus->phy_map[1]; |
| 1156 | smsc_info(PROBE, "PHY addr %d, phy_id 0x%08X", phydev->addr, |
| 1157 | phydev->phy_id); |
| 1158 | |
| 1159 | phydev = phy_connect(dev, phydev->dev.bus_id, |
| 1160 | &smsc9420_phy_adjust_link, 0, PHY_INTERFACE_MODE_MII); |
| 1161 | |
| 1162 | if (IS_ERR(phydev)) { |
| 1163 | pr_err("%s: Could not attach to PHY\n", dev->name); |
| 1164 | return PTR_ERR(phydev); |
| 1165 | } |
| 1166 | |
| 1167 | pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", |
| 1168 | dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq); |
| 1169 | |
| 1170 | /* mask with MAC supported features */ |
| 1171 | phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
| 1172 | SUPPORTED_Asym_Pause); |
| 1173 | phydev->advertising = phydev->supported; |
| 1174 | |
| 1175 | pd->phy_dev = phydev; |
| 1176 | pd->last_duplex = -1; |
| 1177 | pd->last_carrier = -1; |
| 1178 | |
| 1179 | return 0; |
| 1180 | } |
| 1181 | |
| 1182 | static int smsc9420_mii_init(struct net_device *dev) |
| 1183 | { |
| 1184 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1185 | int err = -ENXIO, i; |
| 1186 | |
| 1187 | pd->mii_bus = mdiobus_alloc(); |
| 1188 | if (!pd->mii_bus) { |
| 1189 | err = -ENOMEM; |
| 1190 | goto err_out_1; |
| 1191 | } |
| 1192 | pd->mii_bus->name = DRV_MDIONAME; |
| 1193 | snprintf(pd->mii_bus->id, MII_BUS_ID_SIZE, "%x", |
| 1194 | (pd->pdev->bus->number << 8) | pd->pdev->devfn); |
| 1195 | pd->mii_bus->priv = pd; |
| 1196 | pd->mii_bus->read = smsc9420_mii_read; |
| 1197 | pd->mii_bus->write = smsc9420_mii_write; |
| 1198 | pd->mii_bus->irq = pd->phy_irq; |
| 1199 | for (i = 0; i < PHY_MAX_ADDR; ++i) |
| 1200 | pd->mii_bus->irq[i] = PHY_POLL; |
| 1201 | |
| 1202 | /* Mask all PHYs except ID 1 (internal) */ |
| 1203 | pd->mii_bus->phy_mask = ~(1 << 1); |
| 1204 | |
| 1205 | if (mdiobus_register(pd->mii_bus)) { |
| 1206 | smsc_warn(PROBE, "Error registering mii bus"); |
| 1207 | goto err_out_free_bus_2; |
| 1208 | } |
| 1209 | |
| 1210 | if (smsc9420_mii_probe(dev) < 0) { |
| 1211 | smsc_warn(PROBE, "Error probing mii bus"); |
| 1212 | goto err_out_unregister_bus_3; |
| 1213 | } |
| 1214 | |
| 1215 | return 0; |
| 1216 | |
| 1217 | err_out_unregister_bus_3: |
| 1218 | mdiobus_unregister(pd->mii_bus); |
| 1219 | err_out_free_bus_2: |
| 1220 | mdiobus_free(pd->mii_bus); |
| 1221 | err_out_1: |
| 1222 | return err; |
| 1223 | } |
| 1224 | |
| 1225 | static int smsc9420_alloc_tx_ring(struct smsc9420_pdata *pd) |
| 1226 | { |
| 1227 | int i; |
| 1228 | |
| 1229 | BUG_ON(!pd->tx_ring); |
| 1230 | |
| 1231 | pd->tx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) * |
| 1232 | TX_RING_SIZE), GFP_KERNEL); |
| 1233 | if (!pd->tx_buffers) { |
| 1234 | smsc_warn(IFUP, "Failed to allocated tx_buffers"); |
| 1235 | return -ENOMEM; |
| 1236 | } |
| 1237 | |
| 1238 | /* Initialize the TX Ring */ |
| 1239 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1240 | pd->tx_buffers[i].skb = NULL; |
| 1241 | pd->tx_buffers[i].mapping = 0; |
| 1242 | pd->tx_ring[i].status = 0; |
| 1243 | pd->tx_ring[i].length = 0; |
| 1244 | pd->tx_ring[i].buffer1 = 0; |
| 1245 | pd->tx_ring[i].buffer2 = 0; |
| 1246 | } |
| 1247 | pd->tx_ring[TX_RING_SIZE - 1].length = TDES1_TER_; |
| 1248 | wmb(); |
| 1249 | |
| 1250 | pd->tx_ring_head = 0; |
| 1251 | pd->tx_ring_tail = 0; |
| 1252 | |
| 1253 | smsc9420_reg_write(pd, TX_BASE_ADDR, pd->tx_dma_addr); |
| 1254 | smsc9420_pci_flush_write(pd); |
| 1255 | |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | static int smsc9420_alloc_rx_ring(struct smsc9420_pdata *pd) |
| 1260 | { |
| 1261 | int i; |
| 1262 | |
| 1263 | BUG_ON(!pd->rx_ring); |
| 1264 | |
| 1265 | pd->rx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) * |
| 1266 | RX_RING_SIZE), GFP_KERNEL); |
| 1267 | if (pd->rx_buffers == NULL) { |
| 1268 | smsc_warn(IFUP, "Failed to allocated rx_buffers"); |
| 1269 | goto out; |
| 1270 | } |
| 1271 | |
| 1272 | /* initialize the rx ring */ |
| 1273 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1274 | pd->rx_ring[i].status = 0; |
| 1275 | pd->rx_ring[i].length = PKT_BUF_SZ; |
| 1276 | pd->rx_ring[i].buffer2 = 0; |
| 1277 | pd->rx_buffers[i].skb = NULL; |
| 1278 | pd->rx_buffers[i].mapping = 0; |
| 1279 | } |
| 1280 | pd->rx_ring[RX_RING_SIZE - 1].length = (PKT_BUF_SZ | RDES1_RER_); |
| 1281 | |
| 1282 | /* now allocate the entire ring of skbs */ |
| 1283 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1284 | if (smsc9420_alloc_rx_buffer(pd, i)) { |
| 1285 | smsc_warn(IFUP, "failed to allocate rx skb %d", i); |
| 1286 | goto out_free_rx_skbs; |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | pd->rx_ring_head = 0; |
| 1291 | pd->rx_ring_tail = 0; |
| 1292 | |
| 1293 | smsc9420_reg_write(pd, VLAN1, ETH_P_8021Q); |
| 1294 | smsc_dbg(IFUP, "VLAN1 = 0x%08x", smsc9420_reg_read(pd, VLAN1)); |
| 1295 | |
| 1296 | if (pd->rx_csum) { |
| 1297 | /* Enable RX COE */ |
| 1298 | u32 coe = smsc9420_reg_read(pd, COE_CR) | RX_COE_EN; |
| 1299 | smsc9420_reg_write(pd, COE_CR, coe); |
| 1300 | smsc_dbg(IFUP, "COE_CR = 0x%08x", coe); |
| 1301 | } |
| 1302 | |
| 1303 | smsc9420_reg_write(pd, RX_BASE_ADDR, pd->rx_dma_addr); |
| 1304 | smsc9420_pci_flush_write(pd); |
| 1305 | |
| 1306 | return 0; |
| 1307 | |
| 1308 | out_free_rx_skbs: |
| 1309 | smsc9420_free_rx_ring(pd); |
| 1310 | out: |
| 1311 | return -ENOMEM; |
| 1312 | } |
| 1313 | |
| 1314 | static int smsc9420_open(struct net_device *dev) |
| 1315 | { |
| 1316 | struct smsc9420_pdata *pd; |
| 1317 | u32 bus_mode, mac_cr, dmac_control, int_cfg, dma_intr_ena, int_ctl; |
| 1318 | unsigned long flags; |
| 1319 | int result = 0, timeout; |
| 1320 | |
| 1321 | BUG_ON(!dev); |
| 1322 | pd = netdev_priv(dev); |
| 1323 | BUG_ON(!pd); |
| 1324 | |
| 1325 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 1326 | smsc_warn(IFUP, "dev_addr is not a valid MAC address"); |
| 1327 | result = -EADDRNOTAVAIL; |
| 1328 | goto out_0; |
| 1329 | } |
| 1330 | |
| 1331 | netif_carrier_off(dev); |
| 1332 | |
| 1333 | /* disable, mask and acknowlege all interrupts */ |
| 1334 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1335 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1336 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1337 | smsc9420_reg_write(pd, INT_CTL, 0); |
| 1338 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1339 | smsc9420_reg_write(pd, DMAC_INTR_ENA, 0); |
| 1340 | smsc9420_reg_write(pd, INT_STAT, 0xFFFFFFFF); |
| 1341 | smsc9420_pci_flush_write(pd); |
| 1342 | |
| 1343 | if (request_irq(dev->irq, smsc9420_isr, IRQF_SHARED | IRQF_DISABLED, |
| 1344 | DRV_NAME, pd)) { |
| 1345 | smsc_warn(IFUP, "Unable to use IRQ = %d", dev->irq); |
| 1346 | result = -ENODEV; |
| 1347 | goto out_0; |
| 1348 | } |
| 1349 | |
| 1350 | smsc9420_dmac_soft_reset(pd); |
| 1351 | |
| 1352 | /* make sure MAC_CR is sane */ |
| 1353 | smsc9420_reg_write(pd, MAC_CR, 0); |
| 1354 | |
| 1355 | smsc9420_set_mac_address(dev); |
| 1356 | |
| 1357 | /* Configure GPIO pins to drive LEDs */ |
| 1358 | smsc9420_reg_write(pd, GPIO_CFG, |
| 1359 | (GPIO_CFG_LED_3_ | GPIO_CFG_LED_2_ | GPIO_CFG_LED_1_)); |
| 1360 | |
| 1361 | bus_mode = BUS_MODE_DMA_BURST_LENGTH_16; |
| 1362 | |
| 1363 | #ifdef __BIG_ENDIAN |
| 1364 | bus_mode |= BUS_MODE_DBO_; |
| 1365 | #endif |
| 1366 | |
| 1367 | smsc9420_reg_write(pd, BUS_MODE, bus_mode); |
| 1368 | |
| 1369 | smsc9420_pci_flush_write(pd); |
| 1370 | |
| 1371 | /* set bus master bridge arbitration priority for Rx and TX DMA */ |
| 1372 | smsc9420_reg_write(pd, BUS_CFG, BUS_CFG_RXTXWEIGHT_4_1); |
| 1373 | |
| 1374 | smsc9420_reg_write(pd, DMAC_CONTROL, |
| 1375 | (DMAC_CONTROL_SF_ | DMAC_CONTROL_OSF_)); |
| 1376 | |
| 1377 | smsc9420_pci_flush_write(pd); |
| 1378 | |
| 1379 | /* test the IRQ connection to the ISR */ |
| 1380 | smsc_dbg(IFUP, "Testing ISR using IRQ %d", dev->irq); |
Steve Glendinning | 1609559 | 2009-01-29 17:29:15 -0800 | [diff] [blame] | 1381 | pd->software_irq_signal = false; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1382 | |
| 1383 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1384 | /* configure interrupt deassertion timer and enable interrupts */ |
| 1385 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; |
| 1386 | int_cfg &= ~(INT_CFG_INT_DEAS_MASK); |
| 1387 | int_cfg |= (INT_DEAS_TIME & INT_CFG_INT_DEAS_MASK); |
| 1388 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1389 | |
| 1390 | /* unmask software interrupt */ |
| 1391 | int_ctl = smsc9420_reg_read(pd, INT_CTL) | INT_CTL_SW_INT_EN_; |
| 1392 | smsc9420_reg_write(pd, INT_CTL, int_ctl); |
| 1393 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1394 | smsc9420_pci_flush_write(pd); |
| 1395 | |
| 1396 | timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1397 | while (timeout--) { |
| 1398 | if (pd->software_irq_signal) |
| 1399 | break; |
| 1400 | msleep(1); |
| 1401 | } |
| 1402 | |
| 1403 | /* disable interrupts */ |
| 1404 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1405 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1406 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1407 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1408 | |
| 1409 | if (!pd->software_irq_signal) { |
| 1410 | smsc_warn(IFUP, "ISR failed signaling test"); |
| 1411 | result = -ENODEV; |
| 1412 | goto out_free_irq_1; |
| 1413 | } |
| 1414 | |
| 1415 | smsc_dbg(IFUP, "ISR passed test using IRQ %d", dev->irq); |
| 1416 | |
| 1417 | result = smsc9420_alloc_tx_ring(pd); |
| 1418 | if (result) { |
| 1419 | smsc_warn(IFUP, "Failed to Initialize tx dma ring"); |
| 1420 | result = -ENOMEM; |
| 1421 | goto out_free_irq_1; |
| 1422 | } |
| 1423 | |
| 1424 | result = smsc9420_alloc_rx_ring(pd); |
| 1425 | if (result) { |
| 1426 | smsc_warn(IFUP, "Failed to Initialize rx dma ring"); |
| 1427 | result = -ENOMEM; |
| 1428 | goto out_free_tx_ring_2; |
| 1429 | } |
| 1430 | |
| 1431 | result = smsc9420_mii_init(dev); |
| 1432 | if (result) { |
| 1433 | smsc_warn(IFUP, "Failed to initialize Phy"); |
| 1434 | result = -ENODEV; |
| 1435 | goto out_free_rx_ring_3; |
| 1436 | } |
| 1437 | |
| 1438 | /* Bring the PHY up */ |
| 1439 | phy_start(pd->phy_dev); |
| 1440 | |
| 1441 | napi_enable(&pd->napi); |
| 1442 | |
| 1443 | /* start tx and rx */ |
| 1444 | mac_cr = smsc9420_reg_read(pd, MAC_CR) | MAC_CR_TXEN_ | MAC_CR_RXEN_; |
| 1445 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1446 | |
| 1447 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 1448 | dmac_control |= DMAC_CONTROL_ST_ | DMAC_CONTROL_SR_; |
| 1449 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 1450 | smsc9420_pci_flush_write(pd); |
| 1451 | |
| 1452 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 1453 | dma_intr_ena |= |
| 1454 | (DMAC_INTR_ENA_TX_ | DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); |
| 1455 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 1456 | smsc9420_pci_flush_write(pd); |
| 1457 | |
| 1458 | netif_wake_queue(dev); |
| 1459 | |
| 1460 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); |
| 1461 | |
| 1462 | /* enable interrupts */ |
| 1463 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1464 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; |
| 1465 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1466 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1467 | |
| 1468 | return 0; |
| 1469 | |
| 1470 | out_free_rx_ring_3: |
| 1471 | smsc9420_free_rx_ring(pd); |
| 1472 | out_free_tx_ring_2: |
| 1473 | smsc9420_free_tx_ring(pd); |
| 1474 | out_free_irq_1: |
| 1475 | free_irq(dev->irq, pd); |
| 1476 | out_0: |
| 1477 | return result; |
| 1478 | } |
| 1479 | |
| 1480 | #ifdef CONFIG_PM |
| 1481 | |
| 1482 | static int smsc9420_suspend(struct pci_dev *pdev, pm_message_t state) |
| 1483 | { |
| 1484 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1485 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1486 | u32 int_cfg; |
| 1487 | ulong flags; |
| 1488 | |
| 1489 | /* disable interrupts */ |
| 1490 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1491 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1492 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1493 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1494 | |
| 1495 | if (netif_running(dev)) { |
| 1496 | netif_tx_disable(dev); |
| 1497 | smsc9420_stop_tx(pd); |
| 1498 | smsc9420_free_tx_ring(pd); |
| 1499 | |
| 1500 | napi_disable(&pd->napi); |
| 1501 | smsc9420_stop_rx(pd); |
| 1502 | smsc9420_free_rx_ring(pd); |
| 1503 | |
| 1504 | free_irq(dev->irq, pd); |
| 1505 | |
| 1506 | netif_device_detach(dev); |
| 1507 | } |
| 1508 | |
| 1509 | pci_save_state(pdev); |
| 1510 | pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); |
| 1511 | pci_disable_device(pdev); |
| 1512 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 1513 | |
| 1514 | return 0; |
| 1515 | } |
| 1516 | |
| 1517 | static int smsc9420_resume(struct pci_dev *pdev) |
| 1518 | { |
| 1519 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1520 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1521 | int err; |
| 1522 | |
| 1523 | pci_set_power_state(pdev, PCI_D0); |
| 1524 | pci_restore_state(pdev); |
| 1525 | |
| 1526 | err = pci_enable_device(pdev); |
| 1527 | if (err) |
| 1528 | return err; |
| 1529 | |
| 1530 | pci_set_master(pdev); |
| 1531 | |
| 1532 | err = pci_enable_wake(pdev, 0, 0); |
| 1533 | if (err) |
| 1534 | smsc_warn(IFUP, "pci_enable_wake failed: %d", err); |
| 1535 | |
| 1536 | if (netif_running(dev)) { |
| 1537 | err = smsc9420_open(dev); |
| 1538 | netif_device_attach(dev); |
| 1539 | } |
| 1540 | return err; |
| 1541 | } |
| 1542 | |
| 1543 | #endif /* CONFIG_PM */ |
| 1544 | |
| 1545 | static const struct net_device_ops smsc9420_netdev_ops = { |
| 1546 | .ndo_open = smsc9420_open, |
| 1547 | .ndo_stop = smsc9420_stop, |
| 1548 | .ndo_start_xmit = smsc9420_hard_start_xmit, |
| 1549 | .ndo_get_stats = smsc9420_get_stats, |
| 1550 | .ndo_set_multicast_list = smsc9420_set_multicast_list, |
| 1551 | .ndo_do_ioctl = smsc9420_do_ioctl, |
| 1552 | .ndo_validate_addr = eth_validate_addr, |
Stephen Hemminger | fe96aaa | 2009-01-09 11:13:14 +0000 | [diff] [blame] | 1553 | .ndo_set_mac_address = eth_mac_addr, |
Steve Glendinning | e312674 | 2008-12-12 22:31:50 -0800 | [diff] [blame] | 1554 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1555 | .ndo_poll_controller = smsc9420_poll_controller, |
| 1556 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1557 | }; |
| 1558 | |
| 1559 | static int __devinit |
| 1560 | smsc9420_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 1561 | { |
| 1562 | struct net_device *dev; |
| 1563 | struct smsc9420_pdata *pd; |
| 1564 | void __iomem *virt_addr; |
| 1565 | int result = 0; |
| 1566 | u32 id_rev; |
| 1567 | |
| 1568 | printk(KERN_INFO DRV_DESCRIPTION " version " DRV_VERSION "\n"); |
| 1569 | |
| 1570 | /* First do the PCI initialisation */ |
| 1571 | result = pci_enable_device(pdev); |
| 1572 | if (unlikely(result)) { |
| 1573 | printk(KERN_ERR "Cannot enable smsc9420\n"); |
| 1574 | goto out_0; |
| 1575 | } |
| 1576 | |
| 1577 | pci_set_master(pdev); |
| 1578 | |
| 1579 | dev = alloc_etherdev(sizeof(*pd)); |
| 1580 | if (!dev) { |
| 1581 | printk(KERN_ERR "ether device alloc failed\n"); |
| 1582 | goto out_disable_pci_device_1; |
| 1583 | } |
| 1584 | |
| 1585 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 1586 | |
| 1587 | if (!(pci_resource_flags(pdev, SMSC_BAR) & IORESOURCE_MEM)) { |
| 1588 | printk(KERN_ERR "Cannot find PCI device base address\n"); |
| 1589 | goto out_free_netdev_2; |
| 1590 | } |
| 1591 | |
| 1592 | if ((pci_request_regions(pdev, DRV_NAME))) { |
| 1593 | printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n"); |
| 1594 | goto out_free_netdev_2; |
| 1595 | } |
| 1596 | |
| 1597 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { |
| 1598 | printk(KERN_ERR "No usable DMA configuration, aborting.\n"); |
| 1599 | goto out_free_regions_3; |
| 1600 | } |
| 1601 | |
| 1602 | virt_addr = ioremap(pci_resource_start(pdev, SMSC_BAR), |
| 1603 | pci_resource_len(pdev, SMSC_BAR)); |
| 1604 | if (!virt_addr) { |
| 1605 | printk(KERN_ERR "Cannot map device registers, aborting.\n"); |
| 1606 | goto out_free_regions_3; |
| 1607 | } |
| 1608 | |
| 1609 | /* registers are double mapped with 0 offset for LE and 0x200 for BE */ |
| 1610 | virt_addr += LAN9420_CPSR_ENDIAN_OFFSET; |
| 1611 | |
| 1612 | dev->base_addr = (ulong)virt_addr; |
| 1613 | |
| 1614 | pd = netdev_priv(dev); |
| 1615 | |
| 1616 | /* pci descriptors are created in the PCI consistent area */ |
| 1617 | pd->rx_ring = pci_alloc_consistent(pdev, |
| 1618 | sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE + |
| 1619 | sizeof(struct smsc9420_dma_desc) * TX_RING_SIZE, |
| 1620 | &pd->rx_dma_addr); |
| 1621 | |
| 1622 | if (!pd->rx_ring) |
| 1623 | goto out_free_io_4; |
| 1624 | |
| 1625 | /* descriptors are aligned due to the nature of pci_alloc_consistent */ |
| 1626 | pd->tx_ring = (struct smsc9420_dma_desc *) |
| 1627 | (pd->rx_ring + RX_RING_SIZE); |
| 1628 | pd->tx_dma_addr = pd->rx_dma_addr + |
| 1629 | sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE; |
| 1630 | |
| 1631 | pd->pdev = pdev; |
| 1632 | pd->dev = dev; |
| 1633 | pd->base_addr = virt_addr; |
| 1634 | pd->msg_enable = smsc_debug; |
| 1635 | pd->rx_csum = true; |
| 1636 | |
| 1637 | smsc_dbg(PROBE, "lan_base=0x%08lx", (ulong)virt_addr); |
| 1638 | |
| 1639 | id_rev = smsc9420_reg_read(pd, ID_REV); |
| 1640 | switch (id_rev & 0xFFFF0000) { |
| 1641 | case 0x94200000: |
| 1642 | smsc_info(PROBE, "LAN9420 identified, ID_REV=0x%08X", id_rev); |
| 1643 | break; |
| 1644 | default: |
| 1645 | smsc_warn(PROBE, "LAN9420 NOT identified"); |
| 1646 | smsc_warn(PROBE, "ID_REV=0x%08X", id_rev); |
| 1647 | goto out_free_dmadesc_5; |
| 1648 | } |
| 1649 | |
| 1650 | smsc9420_dmac_soft_reset(pd); |
| 1651 | smsc9420_eeprom_reload(pd); |
| 1652 | smsc9420_check_mac_address(dev); |
| 1653 | |
| 1654 | dev->netdev_ops = &smsc9420_netdev_ops; |
| 1655 | dev->ethtool_ops = &smsc9420_ethtool_ops; |
| 1656 | dev->irq = pdev->irq; |
| 1657 | |
| 1658 | netif_napi_add(dev, &pd->napi, smsc9420_rx_poll, NAPI_WEIGHT); |
| 1659 | |
| 1660 | result = register_netdev(dev); |
| 1661 | if (result) { |
| 1662 | smsc_warn(PROBE, "error %i registering device", result); |
| 1663 | goto out_free_dmadesc_5; |
| 1664 | } |
| 1665 | |
| 1666 | pci_set_drvdata(pdev, dev); |
| 1667 | |
| 1668 | spin_lock_init(&pd->int_lock); |
| 1669 | spin_lock_init(&pd->phy_lock); |
| 1670 | |
| 1671 | dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr); |
| 1672 | |
| 1673 | return 0; |
| 1674 | |
| 1675 | out_free_dmadesc_5: |
| 1676 | pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) * |
| 1677 | (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr); |
| 1678 | out_free_io_4: |
| 1679 | iounmap(virt_addr - LAN9420_CPSR_ENDIAN_OFFSET); |
| 1680 | out_free_regions_3: |
| 1681 | pci_release_regions(pdev); |
| 1682 | out_free_netdev_2: |
| 1683 | free_netdev(dev); |
| 1684 | out_disable_pci_device_1: |
| 1685 | pci_disable_device(pdev); |
| 1686 | out_0: |
| 1687 | return -ENODEV; |
| 1688 | } |
| 1689 | |
| 1690 | static void __devexit smsc9420_remove(struct pci_dev *pdev) |
| 1691 | { |
| 1692 | struct net_device *dev; |
| 1693 | struct smsc9420_pdata *pd; |
| 1694 | |
| 1695 | dev = pci_get_drvdata(pdev); |
| 1696 | if (!dev) |
| 1697 | return; |
| 1698 | |
| 1699 | pci_set_drvdata(pdev, NULL); |
| 1700 | |
| 1701 | pd = netdev_priv(dev); |
| 1702 | unregister_netdev(dev); |
| 1703 | |
| 1704 | /* tx_buffers and rx_buffers are freed in stop */ |
| 1705 | BUG_ON(pd->tx_buffers); |
| 1706 | BUG_ON(pd->rx_buffers); |
| 1707 | |
| 1708 | BUG_ON(!pd->tx_ring); |
| 1709 | BUG_ON(!pd->rx_ring); |
| 1710 | |
| 1711 | pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) * |
| 1712 | (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr); |
| 1713 | |
| 1714 | iounmap(pd->base_addr - LAN9420_CPSR_ENDIAN_OFFSET); |
| 1715 | pci_release_regions(pdev); |
| 1716 | free_netdev(dev); |
| 1717 | pci_disable_device(pdev); |
| 1718 | } |
| 1719 | |
| 1720 | static struct pci_driver smsc9420_driver = { |
| 1721 | .name = DRV_NAME, |
| 1722 | .id_table = smsc9420_id_table, |
| 1723 | .probe = smsc9420_probe, |
| 1724 | .remove = __devexit_p(smsc9420_remove), |
| 1725 | #ifdef CONFIG_PM |
| 1726 | .suspend = smsc9420_suspend, |
| 1727 | .resume = smsc9420_resume, |
| 1728 | #endif /* CONFIG_PM */ |
| 1729 | }; |
| 1730 | |
| 1731 | static int __init smsc9420_init_module(void) |
| 1732 | { |
| 1733 | smsc_debug = netif_msg_init(debug, SMSC_MSG_DEFAULT); |
| 1734 | |
| 1735 | return pci_register_driver(&smsc9420_driver); |
| 1736 | } |
| 1737 | |
| 1738 | static void __exit smsc9420_exit_module(void) |
| 1739 | { |
| 1740 | pci_unregister_driver(&smsc9420_driver); |
| 1741 | } |
| 1742 | |
| 1743 | module_init(smsc9420_init_module); |
| 1744 | module_exit(smsc9420_exit_module); |