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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 30 | #include <asm/unaligned.h> |
| 31 | #include "smsc9420.h" |
| 32 | |
| 33 | #define DRV_NAME "smsc9420" |
| 34 | #define PFX DRV_NAME ": " |
| 35 | #define DRV_MDIONAME "smsc9420-mdio" |
| 36 | #define DRV_DESCRIPTION "SMSC LAN9420 driver" |
| 37 | #define DRV_VERSION "1.01" |
| 38 | |
| 39 | MODULE_LICENSE("GPL"); |
| 40 | MODULE_VERSION(DRV_VERSION); |
| 41 | |
| 42 | struct smsc9420_dma_desc { |
| 43 | u32 status; |
| 44 | u32 length; |
| 45 | u32 buffer1; |
| 46 | u32 buffer2; |
| 47 | }; |
| 48 | |
| 49 | struct smsc9420_ring_info { |
| 50 | struct sk_buff *skb; |
| 51 | dma_addr_t mapping; |
| 52 | }; |
| 53 | |
| 54 | struct smsc9420_pdata { |
| 55 | void __iomem *base_addr; |
| 56 | struct pci_dev *pdev; |
| 57 | struct net_device *dev; |
| 58 | |
| 59 | struct smsc9420_dma_desc *rx_ring; |
| 60 | struct smsc9420_dma_desc *tx_ring; |
| 61 | struct smsc9420_ring_info *tx_buffers; |
| 62 | struct smsc9420_ring_info *rx_buffers; |
| 63 | dma_addr_t rx_dma_addr; |
| 64 | dma_addr_t tx_dma_addr; |
| 65 | int tx_ring_head, tx_ring_tail; |
| 66 | int rx_ring_head, rx_ring_tail; |
| 67 | |
| 68 | spinlock_t int_lock; |
| 69 | spinlock_t phy_lock; |
| 70 | |
| 71 | struct napi_struct napi; |
| 72 | |
| 73 | bool software_irq_signal; |
| 74 | bool rx_csum; |
| 75 | u32 msg_enable; |
| 76 | |
| 77 | struct phy_device *phy_dev; |
| 78 | struct mii_bus *mii_bus; |
| 79 | int phy_irq[PHY_MAX_ADDR]; |
| 80 | int last_duplex; |
| 81 | int last_carrier; |
| 82 | }; |
| 83 | |
Alexey Dobriyan | a3aa188 | 2010-01-07 11:58:11 +0000 | [diff] [blame] | 84 | static DEFINE_PCI_DEVICE_TABLE(smsc9420_id_table) = { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 85 | { PCI_VENDOR_ID_9420, PCI_DEVICE_ID_9420, PCI_ANY_ID, PCI_ANY_ID, }, |
| 86 | { 0, } |
| 87 | }; |
| 88 | |
| 89 | MODULE_DEVICE_TABLE(pci, smsc9420_id_table); |
| 90 | |
| 91 | #define SMSC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) |
| 92 | |
| 93 | static uint smsc_debug; |
| 94 | static uint debug = -1; |
| 95 | module_param(debug, uint, 0); |
| 96 | MODULE_PARM_DESC(debug, "debug level"); |
| 97 | |
| 98 | #define smsc_dbg(TYPE, f, a...) \ |
| 99 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 100 | printk(KERN_DEBUG PFX f "\n", ## a); \ |
| 101 | } while (0) |
| 102 | |
| 103 | #define smsc_info(TYPE, f, a...) \ |
| 104 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 105 | printk(KERN_INFO PFX f "\n", ## a); \ |
| 106 | } while (0) |
| 107 | |
| 108 | #define smsc_warn(TYPE, f, a...) \ |
| 109 | do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \ |
| 110 | printk(KERN_WARNING PFX f "\n", ## a); \ |
| 111 | } while (0) |
| 112 | |
| 113 | static inline u32 smsc9420_reg_read(struct smsc9420_pdata *pd, u32 offset) |
| 114 | { |
| 115 | return ioread32(pd->base_addr + offset); |
| 116 | } |
| 117 | |
| 118 | static inline void |
| 119 | smsc9420_reg_write(struct smsc9420_pdata *pd, u32 offset, u32 value) |
| 120 | { |
| 121 | iowrite32(value, pd->base_addr + offset); |
| 122 | } |
| 123 | |
| 124 | static inline void smsc9420_pci_flush_write(struct smsc9420_pdata *pd) |
| 125 | { |
| 126 | /* to ensure PCI write completion, we must perform a PCI read */ |
| 127 | smsc9420_reg_read(pd, ID_REV); |
| 128 | } |
| 129 | |
| 130 | static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx) |
| 131 | { |
| 132 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; |
| 133 | unsigned long flags; |
| 134 | u32 addr; |
| 135 | int i, reg = -EIO; |
| 136 | |
| 137 | spin_lock_irqsave(&pd->phy_lock, flags); |
| 138 | |
| 139 | /* confirm MII not busy */ |
| 140 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { |
| 141 | smsc_warn(DRV, "MII is busy???"); |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | /* set the address, index & direction (read from PHY) */ |
| 146 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | |
| 147 | MII_ACCESS_MII_READ_; |
| 148 | smsc9420_reg_write(pd, MII_ACCESS, addr); |
| 149 | |
| 150 | /* wait for read to complete with 50us timeout */ |
| 151 | for (i = 0; i < 5; i++) { |
| 152 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & |
| 153 | MII_ACCESS_MII_BUSY_)) { |
| 154 | reg = (u16)smsc9420_reg_read(pd, MII_DATA); |
| 155 | goto out; |
| 156 | } |
| 157 | udelay(10); |
| 158 | } |
| 159 | |
| 160 | smsc_warn(DRV, "MII busy timeout!"); |
| 161 | |
| 162 | out: |
| 163 | spin_unlock_irqrestore(&pd->phy_lock, flags); |
| 164 | return reg; |
| 165 | } |
| 166 | |
| 167 | static int smsc9420_mii_write(struct mii_bus *bus, int phyaddr, int regidx, |
| 168 | u16 val) |
| 169 | { |
| 170 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; |
| 171 | unsigned long flags; |
| 172 | u32 addr; |
| 173 | int i, reg = -EIO; |
| 174 | |
| 175 | spin_lock_irqsave(&pd->phy_lock, flags); |
| 176 | |
| 177 | /* confirm MII not busy */ |
| 178 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { |
| 179 | smsc_warn(DRV, "MII is busy???"); |
| 180 | goto out; |
| 181 | } |
| 182 | |
| 183 | /* put the data to write in the MAC */ |
| 184 | smsc9420_reg_write(pd, MII_DATA, (u32)val); |
| 185 | |
| 186 | /* set the address, index & direction (write to PHY) */ |
| 187 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | |
| 188 | MII_ACCESS_MII_WRITE_; |
| 189 | smsc9420_reg_write(pd, MII_ACCESS, addr); |
| 190 | |
| 191 | /* wait for write to complete with 50us timeout */ |
| 192 | for (i = 0; i < 5; i++) { |
| 193 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & |
| 194 | MII_ACCESS_MII_BUSY_)) { |
| 195 | reg = 0; |
| 196 | goto out; |
| 197 | } |
| 198 | udelay(10); |
| 199 | } |
| 200 | |
| 201 | smsc_warn(DRV, "MII busy timeout!"); |
| 202 | |
| 203 | out: |
| 204 | spin_unlock_irqrestore(&pd->phy_lock, flags); |
| 205 | return reg; |
| 206 | } |
| 207 | |
| 208 | /* Returns hash bit number for given MAC address |
| 209 | * Example: |
| 210 | * 01 00 5E 00 00 01 -> returns bit number 31 */ |
| 211 | static u32 smsc9420_hash(u8 addr[ETH_ALEN]) |
| 212 | { |
| 213 | return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; |
| 214 | } |
| 215 | |
| 216 | static int smsc9420_eeprom_reload(struct smsc9420_pdata *pd) |
| 217 | { |
| 218 | int timeout = 100000; |
| 219 | |
| 220 | BUG_ON(!pd); |
| 221 | |
| 222 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { |
| 223 | smsc_dbg(DRV, "smsc9420_eeprom_reload: Eeprom busy"); |
| 224 | return -EIO; |
| 225 | } |
| 226 | |
| 227 | smsc9420_reg_write(pd, E2P_CMD, |
| 228 | (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_)); |
| 229 | |
| 230 | do { |
| 231 | udelay(10); |
| 232 | if (!(smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_)) |
| 233 | return 0; |
| 234 | } while (timeout--); |
| 235 | |
| 236 | smsc_warn(DRV, "smsc9420_eeprom_reload: Eeprom timed out"); |
| 237 | return -EIO; |
| 238 | } |
| 239 | |
| 240 | /* Standard ioctls for mii-tool */ |
| 241 | static int smsc9420_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 242 | { |
| 243 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 244 | |
| 245 | if (!netif_running(dev) || !pd->phy_dev) |
| 246 | return -EINVAL; |
| 247 | |
Richard Cochran | 28b0411 | 2010-07-17 08:48:55 +0000 | [diff] [blame] | 248 | return phy_mii_ioctl(pd->phy_dev, ifr, cmd); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | static int smsc9420_ethtool_get_settings(struct net_device *dev, |
| 252 | struct ethtool_cmd *cmd) |
| 253 | { |
| 254 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 255 | |
Steve Glendinning | 6c53b1b | 2009-11-29 23:14:45 -0800 | [diff] [blame] | 256 | if (!pd->phy_dev) |
| 257 | return -ENODEV; |
| 258 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 259 | cmd->maxtxpkt = 1; |
| 260 | cmd->maxrxpkt = 1; |
| 261 | return phy_ethtool_gset(pd->phy_dev, cmd); |
| 262 | } |
| 263 | |
| 264 | static int smsc9420_ethtool_set_settings(struct net_device *dev, |
| 265 | struct ethtool_cmd *cmd) |
| 266 | { |
| 267 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 268 | |
Steve Glendinning | 6c53b1b | 2009-11-29 23:14:45 -0800 | [diff] [blame] | 269 | if (!pd->phy_dev) |
| 270 | return -ENODEV; |
| 271 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 272 | return phy_ethtool_sset(pd->phy_dev, cmd); |
| 273 | } |
| 274 | |
| 275 | static void smsc9420_ethtool_get_drvinfo(struct net_device *netdev, |
| 276 | struct ethtool_drvinfo *drvinfo) |
| 277 | { |
| 278 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 279 | |
| 280 | strcpy(drvinfo->driver, DRV_NAME); |
| 281 | strcpy(drvinfo->bus_info, pci_name(pd->pdev)); |
| 282 | strcpy(drvinfo->version, DRV_VERSION); |
| 283 | } |
| 284 | |
| 285 | static u32 smsc9420_ethtool_get_msglevel(struct net_device *netdev) |
| 286 | { |
| 287 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 288 | return pd->msg_enable; |
| 289 | } |
| 290 | |
| 291 | static void smsc9420_ethtool_set_msglevel(struct net_device *netdev, u32 data) |
| 292 | { |
| 293 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
| 294 | pd->msg_enable = data; |
| 295 | } |
| 296 | |
| 297 | static int smsc9420_ethtool_nway_reset(struct net_device *netdev) |
| 298 | { |
| 299 | struct smsc9420_pdata *pd = netdev_priv(netdev); |
Steve Glendinning | 6c53b1b | 2009-11-29 23:14:45 -0800 | [diff] [blame] | 300 | |
| 301 | if (!pd->phy_dev) |
| 302 | return -ENODEV; |
| 303 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 304 | return phy_start_aneg(pd->phy_dev); |
| 305 | } |
| 306 | |
Steve Glendinning | a7276db | 2008-12-15 00:59:47 -0800 | [diff] [blame] | 307 | static int smsc9420_ethtool_getregslen(struct net_device *dev) |
| 308 | { |
| 309 | /* all smsc9420 registers plus all phy registers */ |
| 310 | return 0x100 + (32 * sizeof(u32)); |
| 311 | } |
| 312 | |
| 313 | static void |
| 314 | smsc9420_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, |
| 315 | void *buf) |
| 316 | { |
| 317 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 318 | struct phy_device *phy_dev = pd->phy_dev; |
| 319 | unsigned int i, j = 0; |
| 320 | u32 *data = buf; |
| 321 | |
| 322 | regs->version = smsc9420_reg_read(pd, ID_REV); |
| 323 | for (i = 0; i < 0x100; i += (sizeof(u32))) |
| 324 | data[j++] = smsc9420_reg_read(pd, i); |
| 325 | |
Steve Glendinning | 6c53b1b | 2009-11-29 23:14:45 -0800 | [diff] [blame] | 326 | // cannot read phy registers if the net device is down |
| 327 | if (!phy_dev) |
| 328 | return; |
| 329 | |
Steve Glendinning | a7276db | 2008-12-15 00:59:47 -0800 | [diff] [blame] | 330 | for (i = 0; i <= 31; i++) |
| 331 | data[j++] = smsc9420_mii_read(phy_dev->bus, phy_dev->addr, i); |
| 332 | } |
| 333 | |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 334 | static void smsc9420_eeprom_enable_access(struct smsc9420_pdata *pd) |
| 335 | { |
| 336 | unsigned int temp = smsc9420_reg_read(pd, GPIO_CFG); |
| 337 | temp &= ~GPIO_CFG_EEPR_EN_; |
| 338 | smsc9420_reg_write(pd, GPIO_CFG, temp); |
| 339 | msleep(1); |
| 340 | } |
| 341 | |
| 342 | static int smsc9420_eeprom_send_cmd(struct smsc9420_pdata *pd, u32 op) |
| 343 | { |
| 344 | int timeout = 100; |
| 345 | u32 e2cmd; |
| 346 | |
| 347 | smsc_dbg(HW, "op 0x%08x", op); |
| 348 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { |
| 349 | smsc_warn(HW, "Busy at start"); |
| 350 | return -EBUSY; |
| 351 | } |
| 352 | |
| 353 | e2cmd = op | E2P_CMD_EPC_BUSY_; |
| 354 | smsc9420_reg_write(pd, E2P_CMD, e2cmd); |
| 355 | |
| 356 | do { |
| 357 | msleep(1); |
| 358 | e2cmd = smsc9420_reg_read(pd, E2P_CMD); |
Steve Glendinning | 9df8f4e | 2009-02-16 07:46:06 +0000 | [diff] [blame] | 359 | } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 360 | |
| 361 | if (!timeout) { |
| 362 | smsc_info(HW, "TIMED OUT"); |
| 363 | return -EAGAIN; |
| 364 | } |
| 365 | |
| 366 | if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 367 | smsc_info(HW, "Error occurred during eeprom operation"); |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 368 | return -EINVAL; |
| 369 | } |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | static int smsc9420_eeprom_read_location(struct smsc9420_pdata *pd, |
| 375 | u8 address, u8 *data) |
| 376 | { |
| 377 | u32 op = E2P_CMD_EPC_CMD_READ_ | address; |
| 378 | int ret; |
| 379 | |
| 380 | smsc_dbg(HW, "address 0x%x", address); |
| 381 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 382 | |
| 383 | if (!ret) |
| 384 | data[address] = smsc9420_reg_read(pd, E2P_DATA); |
| 385 | |
| 386 | return ret; |
| 387 | } |
| 388 | |
| 389 | static int smsc9420_eeprom_write_location(struct smsc9420_pdata *pd, |
| 390 | u8 address, u8 data) |
| 391 | { |
| 392 | u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; |
| 393 | int ret; |
| 394 | |
| 395 | smsc_dbg(HW, "address 0x%x, data 0x%x", address, data); |
| 396 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 397 | |
| 398 | if (!ret) { |
| 399 | op = E2P_CMD_EPC_CMD_WRITE_ | address; |
| 400 | smsc9420_reg_write(pd, E2P_DATA, (u32)data); |
| 401 | ret = smsc9420_eeprom_send_cmd(pd, op); |
| 402 | } |
| 403 | |
| 404 | return ret; |
| 405 | } |
| 406 | |
| 407 | static int smsc9420_ethtool_get_eeprom_len(struct net_device *dev) |
| 408 | { |
| 409 | return SMSC9420_EEPROM_SIZE; |
| 410 | } |
| 411 | |
| 412 | static int smsc9420_ethtool_get_eeprom(struct net_device *dev, |
| 413 | struct ethtool_eeprom *eeprom, u8 *data) |
| 414 | { |
| 415 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 416 | u8 eeprom_data[SMSC9420_EEPROM_SIZE]; |
| 417 | int len, i; |
| 418 | |
| 419 | smsc9420_eeprom_enable_access(pd); |
| 420 | |
| 421 | len = min(eeprom->len, SMSC9420_EEPROM_SIZE); |
| 422 | for (i = 0; i < len; i++) { |
| 423 | int ret = smsc9420_eeprom_read_location(pd, i, eeprom_data); |
| 424 | if (ret < 0) { |
| 425 | eeprom->len = 0; |
| 426 | return ret; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | memcpy(data, &eeprom_data[eeprom->offset], len); |
Steve Glendinning | 196b7e1 | 2009-02-15 22:55:01 +0000 | [diff] [blame] | 431 | eeprom->magic = SMSC9420_EEPROM_MAGIC; |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 432 | eeprom->len = len; |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static int smsc9420_ethtool_set_eeprom(struct net_device *dev, |
| 437 | struct ethtool_eeprom *eeprom, u8 *data) |
| 438 | { |
| 439 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 440 | int ret; |
| 441 | |
Steve Glendinning | 196b7e1 | 2009-02-15 22:55:01 +0000 | [diff] [blame] | 442 | if (eeprom->magic != SMSC9420_EEPROM_MAGIC) |
| 443 | return -EINVAL; |
| 444 | |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 445 | smsc9420_eeprom_enable_access(pd); |
| 446 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_); |
| 447 | ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data); |
| 448 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWDS_); |
| 449 | |
| 450 | /* Single byte write, according to man page */ |
| 451 | eeprom->len = 1; |
| 452 | |
| 453 | return ret; |
| 454 | } |
| 455 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 456 | static const struct ethtool_ops smsc9420_ethtool_ops = { |
| 457 | .get_settings = smsc9420_ethtool_get_settings, |
| 458 | .set_settings = smsc9420_ethtool_set_settings, |
| 459 | .get_drvinfo = smsc9420_ethtool_get_drvinfo, |
| 460 | .get_msglevel = smsc9420_ethtool_get_msglevel, |
| 461 | .set_msglevel = smsc9420_ethtool_set_msglevel, |
| 462 | .nway_reset = smsc9420_ethtool_nway_reset, |
| 463 | .get_link = ethtool_op_get_link, |
Steve Glendinning | 012b215 | 2008-12-12 22:32:22 -0800 | [diff] [blame] | 464 | .get_eeprom_len = smsc9420_ethtool_get_eeprom_len, |
| 465 | .get_eeprom = smsc9420_ethtool_get_eeprom, |
| 466 | .set_eeprom = smsc9420_ethtool_set_eeprom, |
Steve Glendinning | a7276db | 2008-12-15 00:59:47 -0800 | [diff] [blame] | 467 | .get_regs_len = smsc9420_ethtool_getregslen, |
| 468 | .get_regs = smsc9420_ethtool_getregs, |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 469 | }; |
| 470 | |
| 471 | /* Sets the device MAC address to dev_addr */ |
| 472 | static void smsc9420_set_mac_address(struct net_device *dev) |
| 473 | { |
| 474 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 475 | u8 *dev_addr = dev->dev_addr; |
| 476 | u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; |
| 477 | u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | |
| 478 | (dev_addr[1] << 8) | dev_addr[0]; |
| 479 | |
| 480 | smsc9420_reg_write(pd, ADDRH, mac_high16); |
| 481 | smsc9420_reg_write(pd, ADDRL, mac_low32); |
| 482 | } |
| 483 | |
| 484 | static void smsc9420_check_mac_address(struct net_device *dev) |
| 485 | { |
| 486 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 487 | |
| 488 | /* Check if mac address has been specified when bringing interface up */ |
| 489 | if (is_valid_ether_addr(dev->dev_addr)) { |
| 490 | smsc9420_set_mac_address(dev); |
| 491 | smsc_dbg(PROBE, "MAC Address is specified by configuration"); |
| 492 | } else { |
| 493 | /* Try reading mac address from device. if EEPROM is present |
| 494 | * it will already have been set */ |
| 495 | u32 mac_high16 = smsc9420_reg_read(pd, ADDRH); |
| 496 | u32 mac_low32 = smsc9420_reg_read(pd, ADDRL); |
| 497 | dev->dev_addr[0] = (u8)(mac_low32); |
| 498 | dev->dev_addr[1] = (u8)(mac_low32 >> 8); |
| 499 | dev->dev_addr[2] = (u8)(mac_low32 >> 16); |
| 500 | dev->dev_addr[3] = (u8)(mac_low32 >> 24); |
| 501 | dev->dev_addr[4] = (u8)(mac_high16); |
| 502 | dev->dev_addr[5] = (u8)(mac_high16 >> 8); |
| 503 | |
| 504 | if (is_valid_ether_addr(dev->dev_addr)) { |
| 505 | /* eeprom values are valid so use them */ |
| 506 | smsc_dbg(PROBE, "Mac Address is read from EEPROM"); |
| 507 | } else { |
| 508 | /* eeprom values are invalid, generate random MAC */ |
| 509 | random_ether_addr(dev->dev_addr); |
| 510 | smsc9420_set_mac_address(dev); |
| 511 | smsc_dbg(PROBE, |
| 512 | "MAC Address is set to random_ether_addr"); |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | static void smsc9420_stop_tx(struct smsc9420_pdata *pd) |
| 518 | { |
| 519 | u32 dmac_control, mac_cr, dma_intr_ena; |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 520 | int timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 521 | |
| 522 | /* disable TX DMAC */ |
| 523 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 524 | dmac_control &= (~DMAC_CONTROL_ST_); |
| 525 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 526 | |
| 527 | /* Wait max 10ms for transmit process to stop */ |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 528 | while (--timeout) { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 529 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_TS_) |
| 530 | break; |
| 531 | udelay(10); |
| 532 | } |
| 533 | |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 534 | if (!timeout) |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 535 | smsc_warn(IFDOWN, "TX DMAC failed to stop"); |
| 536 | |
| 537 | /* ACK Tx DMAC stop bit */ |
| 538 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_TXPS_); |
| 539 | |
| 540 | /* mask TX DMAC interrupts */ |
| 541 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 542 | dma_intr_ena &= ~(DMAC_INTR_ENA_TX_); |
| 543 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 544 | smsc9420_pci_flush_write(pd); |
| 545 | |
| 546 | /* stop MAC TX */ |
| 547 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_TXEN_); |
| 548 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 549 | smsc9420_pci_flush_write(pd); |
| 550 | } |
| 551 | |
| 552 | static void smsc9420_free_tx_ring(struct smsc9420_pdata *pd) |
| 553 | { |
| 554 | int i; |
| 555 | |
| 556 | BUG_ON(!pd->tx_ring); |
| 557 | |
| 558 | if (!pd->tx_buffers) |
| 559 | return; |
| 560 | |
| 561 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 562 | struct sk_buff *skb = pd->tx_buffers[i].skb; |
| 563 | |
| 564 | if (skb) { |
| 565 | BUG_ON(!pd->tx_buffers[i].mapping); |
| 566 | pci_unmap_single(pd->pdev, pd->tx_buffers[i].mapping, |
| 567 | skb->len, PCI_DMA_TODEVICE); |
| 568 | dev_kfree_skb_any(skb); |
| 569 | } |
| 570 | |
| 571 | pd->tx_ring[i].status = 0; |
| 572 | pd->tx_ring[i].length = 0; |
| 573 | pd->tx_ring[i].buffer1 = 0; |
| 574 | pd->tx_ring[i].buffer2 = 0; |
| 575 | } |
| 576 | wmb(); |
| 577 | |
| 578 | kfree(pd->tx_buffers); |
| 579 | pd->tx_buffers = NULL; |
| 580 | |
| 581 | pd->tx_ring_head = 0; |
| 582 | pd->tx_ring_tail = 0; |
| 583 | } |
| 584 | |
| 585 | static void smsc9420_free_rx_ring(struct smsc9420_pdata *pd) |
| 586 | { |
| 587 | int i; |
| 588 | |
| 589 | BUG_ON(!pd->rx_ring); |
| 590 | |
| 591 | if (!pd->rx_buffers) |
| 592 | return; |
| 593 | |
| 594 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 595 | if (pd->rx_buffers[i].skb) |
| 596 | dev_kfree_skb_any(pd->rx_buffers[i].skb); |
| 597 | |
| 598 | if (pd->rx_buffers[i].mapping) |
| 599 | pci_unmap_single(pd->pdev, pd->rx_buffers[i].mapping, |
| 600 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 601 | |
| 602 | pd->rx_ring[i].status = 0; |
| 603 | pd->rx_ring[i].length = 0; |
| 604 | pd->rx_ring[i].buffer1 = 0; |
| 605 | pd->rx_ring[i].buffer2 = 0; |
| 606 | } |
| 607 | wmb(); |
| 608 | |
| 609 | kfree(pd->rx_buffers); |
| 610 | pd->rx_buffers = NULL; |
| 611 | |
| 612 | pd->rx_ring_head = 0; |
| 613 | pd->rx_ring_tail = 0; |
| 614 | } |
| 615 | |
| 616 | static void smsc9420_stop_rx(struct smsc9420_pdata *pd) |
| 617 | { |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 618 | int timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 619 | u32 mac_cr, dmac_control, dma_intr_ena; |
| 620 | |
| 621 | /* mask RX DMAC interrupts */ |
| 622 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 623 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); |
| 624 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 625 | smsc9420_pci_flush_write(pd); |
| 626 | |
| 627 | /* stop RX MAC prior to stoping DMA */ |
| 628 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_RXEN_); |
| 629 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 630 | smsc9420_pci_flush_write(pd); |
| 631 | |
| 632 | /* stop RX DMAC */ |
| 633 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 634 | dmac_control &= (~DMAC_CONTROL_SR_); |
| 635 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 636 | smsc9420_pci_flush_write(pd); |
| 637 | |
| 638 | /* wait up to 10ms for receive to stop */ |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 639 | while (--timeout) { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 640 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_RS_) |
| 641 | break; |
| 642 | udelay(10); |
| 643 | } |
| 644 | |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 645 | if (!timeout) |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 646 | smsc_warn(IFDOWN, "RX DMAC did not stop! timeout."); |
| 647 | |
| 648 | /* ACK the Rx DMAC stop bit */ |
| 649 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_RXPS_); |
| 650 | } |
| 651 | |
| 652 | static irqreturn_t smsc9420_isr(int irq, void *dev_id) |
| 653 | { |
| 654 | struct smsc9420_pdata *pd = dev_id; |
| 655 | u32 int_cfg, int_sts, int_ctl; |
| 656 | irqreturn_t ret = IRQ_NONE; |
| 657 | ulong flags; |
| 658 | |
| 659 | BUG_ON(!pd); |
| 660 | BUG_ON(!pd->base_addr); |
| 661 | |
| 662 | int_cfg = smsc9420_reg_read(pd, INT_CFG); |
| 663 | |
| 664 | /* check if it's our interrupt */ |
| 665 | if ((int_cfg & (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) != |
| 666 | (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) |
| 667 | return IRQ_NONE; |
| 668 | |
| 669 | int_sts = smsc9420_reg_read(pd, INT_STAT); |
| 670 | |
| 671 | if (likely(INT_STAT_DMAC_INT_ & int_sts)) { |
| 672 | u32 status = smsc9420_reg_read(pd, DMAC_STATUS); |
| 673 | u32 ints_to_clear = 0; |
| 674 | |
| 675 | if (status & DMAC_STS_TX_) { |
| 676 | ints_to_clear |= (DMAC_STS_TX_ | DMAC_STS_NIS_); |
| 677 | netif_wake_queue(pd->dev); |
| 678 | } |
| 679 | |
| 680 | if (status & DMAC_STS_RX_) { |
| 681 | /* mask RX DMAC interrupts */ |
| 682 | u32 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 683 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); |
| 684 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 685 | smsc9420_pci_flush_write(pd); |
| 686 | |
| 687 | ints_to_clear |= (DMAC_STS_RX_ | DMAC_STS_NIS_); |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 688 | napi_schedule(&pd->napi); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | if (ints_to_clear) |
| 692 | smsc9420_reg_write(pd, DMAC_STATUS, ints_to_clear); |
| 693 | |
| 694 | ret = IRQ_HANDLED; |
| 695 | } |
| 696 | |
| 697 | if (unlikely(INT_STAT_SW_INT_ & int_sts)) { |
| 698 | /* mask software interrupt */ |
| 699 | spin_lock_irqsave(&pd->int_lock, flags); |
| 700 | int_ctl = smsc9420_reg_read(pd, INT_CTL); |
| 701 | int_ctl &= (~INT_CTL_SW_INT_EN_); |
| 702 | smsc9420_reg_write(pd, INT_CTL, int_ctl); |
| 703 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 704 | |
| 705 | smsc9420_reg_write(pd, INT_STAT, INT_STAT_SW_INT_); |
| 706 | pd->software_irq_signal = true; |
| 707 | smp_wmb(); |
| 708 | |
| 709 | ret = IRQ_HANDLED; |
| 710 | } |
| 711 | |
| 712 | /* to ensure PCI write completion, we must perform a PCI read */ |
| 713 | smsc9420_pci_flush_write(pd); |
| 714 | |
| 715 | return ret; |
| 716 | } |
| 717 | |
Steve Glendinning | e312674 | 2008-12-12 22:31:50 -0800 | [diff] [blame] | 718 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 719 | static void smsc9420_poll_controller(struct net_device *dev) |
| 720 | { |
| 721 | disable_irq(dev->irq); |
| 722 | smsc9420_isr(0, dev); |
| 723 | enable_irq(dev->irq); |
| 724 | } |
| 725 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| 726 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 727 | static void smsc9420_dmac_soft_reset(struct smsc9420_pdata *pd) |
| 728 | { |
| 729 | smsc9420_reg_write(pd, BUS_MODE, BUS_MODE_SWR_); |
| 730 | smsc9420_reg_read(pd, BUS_MODE); |
| 731 | udelay(2); |
| 732 | if (smsc9420_reg_read(pd, BUS_MODE) & BUS_MODE_SWR_) |
| 733 | smsc_warn(DRV, "Software reset not cleared"); |
| 734 | } |
| 735 | |
| 736 | static int smsc9420_stop(struct net_device *dev) |
| 737 | { |
| 738 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 739 | u32 int_cfg; |
| 740 | ulong flags; |
| 741 | |
| 742 | BUG_ON(!pd); |
| 743 | BUG_ON(!pd->phy_dev); |
| 744 | |
| 745 | /* disable master interrupt */ |
| 746 | spin_lock_irqsave(&pd->int_lock, flags); |
| 747 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 748 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 749 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 750 | |
| 751 | netif_tx_disable(dev); |
| 752 | napi_disable(&pd->napi); |
| 753 | |
| 754 | smsc9420_stop_tx(pd); |
| 755 | smsc9420_free_tx_ring(pd); |
| 756 | |
| 757 | smsc9420_stop_rx(pd); |
| 758 | smsc9420_free_rx_ring(pd); |
| 759 | |
| 760 | free_irq(dev->irq, pd); |
| 761 | |
| 762 | smsc9420_dmac_soft_reset(pd); |
| 763 | |
| 764 | phy_stop(pd->phy_dev); |
| 765 | |
| 766 | phy_disconnect(pd->phy_dev); |
| 767 | pd->phy_dev = NULL; |
| 768 | mdiobus_unregister(pd->mii_bus); |
| 769 | mdiobus_free(pd->mii_bus); |
| 770 | |
| 771 | return 0; |
| 772 | } |
| 773 | |
| 774 | static void smsc9420_rx_count_stats(struct net_device *dev, u32 desc_status) |
| 775 | { |
| 776 | if (unlikely(desc_status & RDES0_ERROR_SUMMARY_)) { |
| 777 | dev->stats.rx_errors++; |
| 778 | if (desc_status & RDES0_DESCRIPTOR_ERROR_) |
| 779 | dev->stats.rx_over_errors++; |
| 780 | else if (desc_status & (RDES0_FRAME_TOO_LONG_ | |
| 781 | RDES0_RUNT_FRAME_ | RDES0_COLLISION_SEEN_)) |
| 782 | dev->stats.rx_frame_errors++; |
| 783 | else if (desc_status & RDES0_CRC_ERROR_) |
| 784 | dev->stats.rx_crc_errors++; |
| 785 | } |
| 786 | |
| 787 | if (unlikely(desc_status & RDES0_LENGTH_ERROR_)) |
| 788 | dev->stats.rx_length_errors++; |
| 789 | |
| 790 | if (unlikely(!((desc_status & RDES0_LAST_DESCRIPTOR_) && |
| 791 | (desc_status & RDES0_FIRST_DESCRIPTOR_)))) |
| 792 | dev->stats.rx_length_errors++; |
| 793 | |
| 794 | if (desc_status & RDES0_MULTICAST_FRAME_) |
| 795 | dev->stats.multicast++; |
| 796 | } |
| 797 | |
| 798 | static void smsc9420_rx_handoff(struct smsc9420_pdata *pd, const int index, |
| 799 | const u32 status) |
| 800 | { |
| 801 | struct net_device *dev = pd->dev; |
| 802 | struct sk_buff *skb; |
| 803 | u16 packet_length = (status & RDES0_FRAME_LENGTH_MASK_) |
| 804 | >> RDES0_FRAME_LENGTH_SHFT_; |
| 805 | |
| 806 | /* remove crc from packet lendth */ |
| 807 | packet_length -= 4; |
| 808 | |
| 809 | if (pd->rx_csum) |
| 810 | packet_length -= 2; |
| 811 | |
| 812 | dev->stats.rx_packets++; |
| 813 | dev->stats.rx_bytes += packet_length; |
| 814 | |
| 815 | pci_unmap_single(pd->pdev, pd->rx_buffers[index].mapping, |
| 816 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 817 | pd->rx_buffers[index].mapping = 0; |
| 818 | |
| 819 | skb = pd->rx_buffers[index].skb; |
| 820 | pd->rx_buffers[index].skb = NULL; |
| 821 | |
| 822 | if (pd->rx_csum) { |
| 823 | u16 hw_csum = get_unaligned_le16(skb_tail_pointer(skb) + |
| 824 | NET_IP_ALIGN + packet_length + 4); |
Steve Glendinning | cd7a3b7 | 2009-03-20 01:14:53 -0700 | [diff] [blame] | 825 | put_unaligned_le16(hw_csum, &skb->csum); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 826 | skb->ip_summed = CHECKSUM_COMPLETE; |
| 827 | } |
| 828 | |
| 829 | skb_reserve(skb, NET_IP_ALIGN); |
| 830 | skb_put(skb, packet_length); |
| 831 | |
| 832 | skb->protocol = eth_type_trans(skb, dev); |
| 833 | |
| 834 | netif_receive_skb(skb); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | static int smsc9420_alloc_rx_buffer(struct smsc9420_pdata *pd, int index) |
| 838 | { |
| 839 | struct sk_buff *skb = netdev_alloc_skb(pd->dev, PKT_BUF_SZ); |
| 840 | dma_addr_t mapping; |
| 841 | |
| 842 | BUG_ON(pd->rx_buffers[index].skb); |
| 843 | BUG_ON(pd->rx_buffers[index].mapping); |
| 844 | |
| 845 | if (unlikely(!skb)) { |
| 846 | smsc_warn(RX_ERR, "Failed to allocate new skb!"); |
| 847 | return -ENOMEM; |
| 848 | } |
| 849 | |
| 850 | skb->dev = pd->dev; |
| 851 | |
| 852 | mapping = pci_map_single(pd->pdev, skb_tail_pointer(skb), |
| 853 | PKT_BUF_SZ, PCI_DMA_FROMDEVICE); |
| 854 | if (pci_dma_mapping_error(pd->pdev, mapping)) { |
| 855 | dev_kfree_skb_any(skb); |
| 856 | smsc_warn(RX_ERR, "pci_map_single failed!"); |
| 857 | return -ENOMEM; |
| 858 | } |
| 859 | |
| 860 | pd->rx_buffers[index].skb = skb; |
| 861 | pd->rx_buffers[index].mapping = mapping; |
| 862 | pd->rx_ring[index].buffer1 = mapping + NET_IP_ALIGN; |
| 863 | pd->rx_ring[index].status = RDES0_OWN_; |
| 864 | wmb(); |
| 865 | |
| 866 | return 0; |
| 867 | } |
| 868 | |
| 869 | static void smsc9420_alloc_new_rx_buffers(struct smsc9420_pdata *pd) |
| 870 | { |
| 871 | while (pd->rx_ring_tail != pd->rx_ring_head) { |
| 872 | if (smsc9420_alloc_rx_buffer(pd, pd->rx_ring_tail)) |
| 873 | break; |
| 874 | |
| 875 | pd->rx_ring_tail = (pd->rx_ring_tail + 1) % RX_RING_SIZE; |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | static int smsc9420_rx_poll(struct napi_struct *napi, int budget) |
| 880 | { |
| 881 | struct smsc9420_pdata *pd = |
| 882 | container_of(napi, struct smsc9420_pdata, napi); |
| 883 | struct net_device *dev = pd->dev; |
| 884 | u32 drop_frame_cnt, dma_intr_ena, status; |
| 885 | int work_done; |
| 886 | |
| 887 | for (work_done = 0; work_done < budget; work_done++) { |
| 888 | rmb(); |
| 889 | status = pd->rx_ring[pd->rx_ring_head].status; |
| 890 | |
| 891 | /* stop if DMAC owns this dma descriptor */ |
| 892 | if (status & RDES0_OWN_) |
| 893 | break; |
| 894 | |
| 895 | smsc9420_rx_count_stats(dev, status); |
| 896 | smsc9420_rx_handoff(pd, pd->rx_ring_head, status); |
| 897 | pd->rx_ring_head = (pd->rx_ring_head + 1) % RX_RING_SIZE; |
| 898 | smsc9420_alloc_new_rx_buffers(pd); |
| 899 | } |
| 900 | |
| 901 | drop_frame_cnt = smsc9420_reg_read(pd, MISS_FRAME_CNTR); |
| 902 | dev->stats.rx_dropped += |
| 903 | (drop_frame_cnt & 0xFFFF) + ((drop_frame_cnt >> 17) & 0x3FF); |
| 904 | |
| 905 | /* Kick RXDMA */ |
| 906 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); |
| 907 | smsc9420_pci_flush_write(pd); |
| 908 | |
| 909 | if (work_done < budget) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 910 | napi_complete(&pd->napi); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 911 | |
| 912 | /* re-enable RX DMA interrupts */ |
| 913 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 914 | dma_intr_ena |= (DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); |
| 915 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 916 | smsc9420_pci_flush_write(pd); |
| 917 | } |
| 918 | return work_done; |
| 919 | } |
| 920 | |
| 921 | static void |
| 922 | smsc9420_tx_update_stats(struct net_device *dev, u32 status, u32 length) |
| 923 | { |
| 924 | if (unlikely(status & TDES0_ERROR_SUMMARY_)) { |
| 925 | dev->stats.tx_errors++; |
| 926 | if (status & (TDES0_EXCESSIVE_DEFERRAL_ | |
| 927 | TDES0_EXCESSIVE_COLLISIONS_)) |
| 928 | dev->stats.tx_aborted_errors++; |
| 929 | |
| 930 | if (status & (TDES0_LOSS_OF_CARRIER_ | TDES0_NO_CARRIER_)) |
| 931 | dev->stats.tx_carrier_errors++; |
| 932 | } else { |
| 933 | dev->stats.tx_packets++; |
| 934 | dev->stats.tx_bytes += (length & 0x7FF); |
| 935 | } |
| 936 | |
| 937 | if (unlikely(status & TDES0_EXCESSIVE_COLLISIONS_)) { |
| 938 | dev->stats.collisions += 16; |
| 939 | } else { |
| 940 | dev->stats.collisions += |
| 941 | (status & TDES0_COLLISION_COUNT_MASK_) >> |
| 942 | TDES0_COLLISION_COUNT_SHFT_; |
| 943 | } |
| 944 | |
| 945 | if (unlikely(status & TDES0_HEARTBEAT_FAIL_)) |
| 946 | dev->stats.tx_heartbeat_errors++; |
| 947 | } |
| 948 | |
| 949 | /* Check for completed dma transfers, update stats and free skbs */ |
| 950 | static void smsc9420_complete_tx(struct net_device *dev) |
| 951 | { |
| 952 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 953 | |
| 954 | while (pd->tx_ring_tail != pd->tx_ring_head) { |
| 955 | int index = pd->tx_ring_tail; |
| 956 | u32 status, length; |
| 957 | |
| 958 | rmb(); |
| 959 | status = pd->tx_ring[index].status; |
| 960 | length = pd->tx_ring[index].length; |
| 961 | |
| 962 | /* Check if DMA still owns this descriptor */ |
| 963 | if (unlikely(TDES0_OWN_ & status)) |
| 964 | break; |
| 965 | |
| 966 | smsc9420_tx_update_stats(dev, status, length); |
| 967 | |
| 968 | BUG_ON(!pd->tx_buffers[index].skb); |
| 969 | BUG_ON(!pd->tx_buffers[index].mapping); |
| 970 | |
| 971 | pci_unmap_single(pd->pdev, pd->tx_buffers[index].mapping, |
| 972 | pd->tx_buffers[index].skb->len, PCI_DMA_TODEVICE); |
| 973 | pd->tx_buffers[index].mapping = 0; |
| 974 | |
| 975 | dev_kfree_skb_any(pd->tx_buffers[index].skb); |
| 976 | pd->tx_buffers[index].skb = NULL; |
| 977 | |
| 978 | pd->tx_ring[index].buffer1 = 0; |
| 979 | wmb(); |
| 980 | |
| 981 | pd->tx_ring_tail = (pd->tx_ring_tail + 1) % TX_RING_SIZE; |
| 982 | } |
| 983 | } |
| 984 | |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 985 | static netdev_tx_t smsc9420_hard_start_xmit(struct sk_buff *skb, |
| 986 | struct net_device *dev) |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 987 | { |
| 988 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 989 | dma_addr_t mapping; |
| 990 | int index = pd->tx_ring_head; |
| 991 | u32 tmp_desc1; |
| 992 | bool about_to_take_last_desc = |
| 993 | (((pd->tx_ring_head + 2) % TX_RING_SIZE) == pd->tx_ring_tail); |
| 994 | |
| 995 | smsc9420_complete_tx(dev); |
| 996 | |
| 997 | rmb(); |
| 998 | BUG_ON(pd->tx_ring[index].status & TDES0_OWN_); |
| 999 | BUG_ON(pd->tx_buffers[index].skb); |
| 1000 | BUG_ON(pd->tx_buffers[index].mapping); |
| 1001 | |
| 1002 | mapping = pci_map_single(pd->pdev, skb->data, |
| 1003 | skb->len, PCI_DMA_TODEVICE); |
| 1004 | if (pci_dma_mapping_error(pd->pdev, mapping)) { |
| 1005 | smsc_warn(TX_ERR, "pci_map_single failed, dropping packet"); |
| 1006 | return NETDEV_TX_BUSY; |
| 1007 | } |
| 1008 | |
| 1009 | pd->tx_buffers[index].skb = skb; |
| 1010 | pd->tx_buffers[index].mapping = mapping; |
| 1011 | |
| 1012 | tmp_desc1 = (TDES1_LS_ | ((u32)skb->len & 0x7FF)); |
| 1013 | if (unlikely(about_to_take_last_desc)) { |
| 1014 | tmp_desc1 |= TDES1_IC_; |
| 1015 | netif_stop_queue(pd->dev); |
| 1016 | } |
| 1017 | |
| 1018 | /* check if we are at the last descriptor and need to set EOR */ |
| 1019 | if (unlikely(index == (TX_RING_SIZE - 1))) |
| 1020 | tmp_desc1 |= TDES1_TER_; |
| 1021 | |
| 1022 | pd->tx_ring[index].buffer1 = mapping; |
| 1023 | pd->tx_ring[index].length = tmp_desc1; |
| 1024 | wmb(); |
| 1025 | |
| 1026 | /* increment head */ |
| 1027 | pd->tx_ring_head = (pd->tx_ring_head + 1) % TX_RING_SIZE; |
| 1028 | |
| 1029 | /* assign ownership to DMAC */ |
| 1030 | pd->tx_ring[index].status = TDES0_OWN_; |
| 1031 | wmb(); |
| 1032 | |
| 1033 | /* kick the DMA */ |
| 1034 | smsc9420_reg_write(pd, TX_POLL_DEMAND, 1); |
| 1035 | smsc9420_pci_flush_write(pd); |
| 1036 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1037 | return NETDEV_TX_OK; |
| 1038 | } |
| 1039 | |
| 1040 | static struct net_device_stats *smsc9420_get_stats(struct net_device *dev) |
| 1041 | { |
| 1042 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1043 | u32 counter = smsc9420_reg_read(pd, MISS_FRAME_CNTR); |
| 1044 | dev->stats.rx_dropped += |
| 1045 | (counter & 0x0000FFFF) + ((counter >> 17) & 0x000003FF); |
| 1046 | return &dev->stats; |
| 1047 | } |
| 1048 | |
| 1049 | static void smsc9420_set_multicast_list(struct net_device *dev) |
| 1050 | { |
| 1051 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1052 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); |
| 1053 | |
| 1054 | if (dev->flags & IFF_PROMISC) { |
| 1055 | smsc_dbg(HW, "Promiscuous Mode Enabled"); |
| 1056 | mac_cr |= MAC_CR_PRMS_; |
| 1057 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1058 | mac_cr &= (~MAC_CR_HPFILT_); |
| 1059 | } else if (dev->flags & IFF_ALLMULTI) { |
| 1060 | smsc_dbg(HW, "Receive all Multicast Enabled"); |
| 1061 | mac_cr &= (~MAC_CR_PRMS_); |
| 1062 | mac_cr |= MAC_CR_MCPAS_; |
| 1063 | mac_cr &= (~MAC_CR_HPFILT_); |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 1064 | } else if (!netdev_mc_empty(dev)) { |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1065 | struct netdev_hw_addr *ha; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1066 | u32 hash_lo = 0, hash_hi = 0; |
| 1067 | |
| 1068 | smsc_dbg(HW, "Multicast filter enabled"); |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1069 | netdev_for_each_mc_addr(ha, dev) { |
| 1070 | u32 bit_num = smsc9420_hash(ha->addr); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1071 | u32 mask = 1 << (bit_num & 0x1F); |
| 1072 | |
| 1073 | if (bit_num & 0x20) |
| 1074 | hash_hi |= mask; |
| 1075 | else |
| 1076 | hash_lo |= mask; |
| 1077 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1078 | } |
| 1079 | smsc9420_reg_write(pd, HASHH, hash_hi); |
| 1080 | smsc9420_reg_write(pd, HASHL, hash_lo); |
| 1081 | |
| 1082 | mac_cr &= (~MAC_CR_PRMS_); |
| 1083 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1084 | mac_cr |= MAC_CR_HPFILT_; |
| 1085 | } else { |
| 1086 | smsc_dbg(HW, "Receive own packets only."); |
| 1087 | smsc9420_reg_write(pd, HASHH, 0); |
| 1088 | smsc9420_reg_write(pd, HASHL, 0); |
| 1089 | |
| 1090 | mac_cr &= (~MAC_CR_PRMS_); |
| 1091 | mac_cr &= (~MAC_CR_MCPAS_); |
| 1092 | mac_cr &= (~MAC_CR_HPFILT_); |
| 1093 | } |
| 1094 | |
| 1095 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1096 | smsc9420_pci_flush_write(pd); |
| 1097 | } |
| 1098 | |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1099 | static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd) |
| 1100 | { |
| 1101 | struct phy_device *phy_dev = pd->phy_dev; |
| 1102 | u32 flow; |
| 1103 | |
| 1104 | if (phy_dev->duplex == DUPLEX_FULL) { |
| 1105 | u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); |
| 1106 | u16 rmtadv = phy_read(phy_dev, MII_LPA); |
Steve Glendinning | bc02ff9 | 2008-12-16 02:00:48 -0800 | [diff] [blame] | 1107 | u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1108 | |
| 1109 | if (cap & FLOW_CTRL_RX) |
| 1110 | flow = 0xFFFF0002; |
| 1111 | else |
| 1112 | flow = 0; |
| 1113 | |
| 1114 | smsc_info(LINK, "rx pause %s, tx pause %s", |
| 1115 | (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), |
| 1116 | (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); |
| 1117 | } else { |
| 1118 | smsc_info(LINK, "half duplex"); |
| 1119 | flow = 0; |
| 1120 | } |
| 1121 | |
| 1122 | smsc9420_reg_write(pd, FLOW, flow); |
| 1123 | } |
| 1124 | |
| 1125 | /* Update link mode if anything has changed. Called periodically when the |
| 1126 | * PHY is in polling mode, even if nothing has changed. */ |
| 1127 | static void smsc9420_phy_adjust_link(struct net_device *dev) |
| 1128 | { |
| 1129 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1130 | struct phy_device *phy_dev = pd->phy_dev; |
| 1131 | int carrier; |
| 1132 | |
| 1133 | if (phy_dev->duplex != pd->last_duplex) { |
| 1134 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); |
| 1135 | if (phy_dev->duplex) { |
| 1136 | smsc_dbg(LINK, "full duplex mode"); |
| 1137 | mac_cr |= MAC_CR_FDPX_; |
| 1138 | } else { |
| 1139 | smsc_dbg(LINK, "half duplex mode"); |
| 1140 | mac_cr &= ~MAC_CR_FDPX_; |
| 1141 | } |
| 1142 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1143 | |
| 1144 | smsc9420_phy_update_flowcontrol(pd); |
| 1145 | pd->last_duplex = phy_dev->duplex; |
| 1146 | } |
| 1147 | |
| 1148 | carrier = netif_carrier_ok(dev); |
| 1149 | if (carrier != pd->last_carrier) { |
| 1150 | if (carrier) |
| 1151 | smsc_dbg(LINK, "carrier OK"); |
| 1152 | else |
| 1153 | smsc_dbg(LINK, "no carrier"); |
| 1154 | pd->last_carrier = carrier; |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | static int smsc9420_mii_probe(struct net_device *dev) |
| 1159 | { |
| 1160 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1161 | struct phy_device *phydev = NULL; |
| 1162 | |
| 1163 | BUG_ON(pd->phy_dev); |
| 1164 | |
| 1165 | /* Device only supports internal PHY at address 1 */ |
| 1166 | if (!pd->mii_bus->phy_map[1]) { |
| 1167 | pr_err("%s: no PHY found at address 1\n", dev->name); |
| 1168 | return -ENODEV; |
| 1169 | } |
| 1170 | |
| 1171 | phydev = pd->mii_bus->phy_map[1]; |
| 1172 | smsc_info(PROBE, "PHY addr %d, phy_id 0x%08X", phydev->addr, |
| 1173 | phydev->phy_id); |
| 1174 | |
Kay Sievers | db1d7bf | 2009-01-26 21:12:58 -0800 | [diff] [blame] | 1175 | phydev = phy_connect(dev, dev_name(&phydev->dev), |
Julia Lawall | a974a67 | 2009-11-18 08:23:17 +0000 | [diff] [blame] | 1176 | smsc9420_phy_adjust_link, 0, PHY_INTERFACE_MODE_MII); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1177 | |
| 1178 | if (IS_ERR(phydev)) { |
| 1179 | pr_err("%s: Could not attach to PHY\n", dev->name); |
| 1180 | return PTR_ERR(phydev); |
| 1181 | } |
| 1182 | |
| 1183 | pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", |
Kay Sievers | db1d7bf | 2009-01-26 21:12:58 -0800 | [diff] [blame] | 1184 | dev->name, phydev->drv->name, dev_name(&phydev->dev), phydev->irq); |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1185 | |
| 1186 | /* mask with MAC supported features */ |
| 1187 | phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
| 1188 | SUPPORTED_Asym_Pause); |
| 1189 | phydev->advertising = phydev->supported; |
| 1190 | |
| 1191 | pd->phy_dev = phydev; |
| 1192 | pd->last_duplex = -1; |
| 1193 | pd->last_carrier = -1; |
| 1194 | |
| 1195 | return 0; |
| 1196 | } |
| 1197 | |
| 1198 | static int smsc9420_mii_init(struct net_device *dev) |
| 1199 | { |
| 1200 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1201 | int err = -ENXIO, i; |
| 1202 | |
| 1203 | pd->mii_bus = mdiobus_alloc(); |
| 1204 | if (!pd->mii_bus) { |
| 1205 | err = -ENOMEM; |
| 1206 | goto err_out_1; |
| 1207 | } |
| 1208 | pd->mii_bus->name = DRV_MDIONAME; |
| 1209 | snprintf(pd->mii_bus->id, MII_BUS_ID_SIZE, "%x", |
| 1210 | (pd->pdev->bus->number << 8) | pd->pdev->devfn); |
| 1211 | pd->mii_bus->priv = pd; |
| 1212 | pd->mii_bus->read = smsc9420_mii_read; |
| 1213 | pd->mii_bus->write = smsc9420_mii_write; |
| 1214 | pd->mii_bus->irq = pd->phy_irq; |
| 1215 | for (i = 0; i < PHY_MAX_ADDR; ++i) |
| 1216 | pd->mii_bus->irq[i] = PHY_POLL; |
| 1217 | |
| 1218 | /* Mask all PHYs except ID 1 (internal) */ |
| 1219 | pd->mii_bus->phy_mask = ~(1 << 1); |
| 1220 | |
| 1221 | if (mdiobus_register(pd->mii_bus)) { |
| 1222 | smsc_warn(PROBE, "Error registering mii bus"); |
| 1223 | goto err_out_free_bus_2; |
| 1224 | } |
| 1225 | |
| 1226 | if (smsc9420_mii_probe(dev) < 0) { |
| 1227 | smsc_warn(PROBE, "Error probing mii bus"); |
| 1228 | goto err_out_unregister_bus_3; |
| 1229 | } |
| 1230 | |
| 1231 | return 0; |
| 1232 | |
| 1233 | err_out_unregister_bus_3: |
| 1234 | mdiobus_unregister(pd->mii_bus); |
| 1235 | err_out_free_bus_2: |
| 1236 | mdiobus_free(pd->mii_bus); |
| 1237 | err_out_1: |
| 1238 | return err; |
| 1239 | } |
| 1240 | |
| 1241 | static int smsc9420_alloc_tx_ring(struct smsc9420_pdata *pd) |
| 1242 | { |
| 1243 | int i; |
| 1244 | |
| 1245 | BUG_ON(!pd->tx_ring); |
| 1246 | |
| 1247 | pd->tx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) * |
| 1248 | TX_RING_SIZE), GFP_KERNEL); |
| 1249 | if (!pd->tx_buffers) { |
| 1250 | smsc_warn(IFUP, "Failed to allocated tx_buffers"); |
| 1251 | return -ENOMEM; |
| 1252 | } |
| 1253 | |
| 1254 | /* Initialize the TX Ring */ |
| 1255 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1256 | pd->tx_buffers[i].skb = NULL; |
| 1257 | pd->tx_buffers[i].mapping = 0; |
| 1258 | pd->tx_ring[i].status = 0; |
| 1259 | pd->tx_ring[i].length = 0; |
| 1260 | pd->tx_ring[i].buffer1 = 0; |
| 1261 | pd->tx_ring[i].buffer2 = 0; |
| 1262 | } |
| 1263 | pd->tx_ring[TX_RING_SIZE - 1].length = TDES1_TER_; |
| 1264 | wmb(); |
| 1265 | |
| 1266 | pd->tx_ring_head = 0; |
| 1267 | pd->tx_ring_tail = 0; |
| 1268 | |
| 1269 | smsc9420_reg_write(pd, TX_BASE_ADDR, pd->tx_dma_addr); |
| 1270 | smsc9420_pci_flush_write(pd); |
| 1271 | |
| 1272 | return 0; |
| 1273 | } |
| 1274 | |
| 1275 | static int smsc9420_alloc_rx_ring(struct smsc9420_pdata *pd) |
| 1276 | { |
| 1277 | int i; |
| 1278 | |
| 1279 | BUG_ON(!pd->rx_ring); |
| 1280 | |
| 1281 | pd->rx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) * |
| 1282 | RX_RING_SIZE), GFP_KERNEL); |
| 1283 | if (pd->rx_buffers == NULL) { |
| 1284 | smsc_warn(IFUP, "Failed to allocated rx_buffers"); |
| 1285 | goto out; |
| 1286 | } |
| 1287 | |
| 1288 | /* initialize the rx ring */ |
| 1289 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1290 | pd->rx_ring[i].status = 0; |
| 1291 | pd->rx_ring[i].length = PKT_BUF_SZ; |
| 1292 | pd->rx_ring[i].buffer2 = 0; |
| 1293 | pd->rx_buffers[i].skb = NULL; |
| 1294 | pd->rx_buffers[i].mapping = 0; |
| 1295 | } |
| 1296 | pd->rx_ring[RX_RING_SIZE - 1].length = (PKT_BUF_SZ | RDES1_RER_); |
| 1297 | |
| 1298 | /* now allocate the entire ring of skbs */ |
| 1299 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1300 | if (smsc9420_alloc_rx_buffer(pd, i)) { |
| 1301 | smsc_warn(IFUP, "failed to allocate rx skb %d", i); |
| 1302 | goto out_free_rx_skbs; |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | pd->rx_ring_head = 0; |
| 1307 | pd->rx_ring_tail = 0; |
| 1308 | |
| 1309 | smsc9420_reg_write(pd, VLAN1, ETH_P_8021Q); |
| 1310 | smsc_dbg(IFUP, "VLAN1 = 0x%08x", smsc9420_reg_read(pd, VLAN1)); |
| 1311 | |
| 1312 | if (pd->rx_csum) { |
| 1313 | /* Enable RX COE */ |
| 1314 | u32 coe = smsc9420_reg_read(pd, COE_CR) | RX_COE_EN; |
| 1315 | smsc9420_reg_write(pd, COE_CR, coe); |
| 1316 | smsc_dbg(IFUP, "COE_CR = 0x%08x", coe); |
| 1317 | } |
| 1318 | |
| 1319 | smsc9420_reg_write(pd, RX_BASE_ADDR, pd->rx_dma_addr); |
| 1320 | smsc9420_pci_flush_write(pd); |
| 1321 | |
| 1322 | return 0; |
| 1323 | |
| 1324 | out_free_rx_skbs: |
| 1325 | smsc9420_free_rx_ring(pd); |
| 1326 | out: |
| 1327 | return -ENOMEM; |
| 1328 | } |
| 1329 | |
| 1330 | static int smsc9420_open(struct net_device *dev) |
| 1331 | { |
| 1332 | struct smsc9420_pdata *pd; |
| 1333 | u32 bus_mode, mac_cr, dmac_control, int_cfg, dma_intr_ena, int_ctl; |
| 1334 | unsigned long flags; |
| 1335 | int result = 0, timeout; |
| 1336 | |
| 1337 | BUG_ON(!dev); |
| 1338 | pd = netdev_priv(dev); |
| 1339 | BUG_ON(!pd); |
| 1340 | |
| 1341 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 1342 | smsc_warn(IFUP, "dev_addr is not a valid MAC address"); |
| 1343 | result = -EADDRNOTAVAIL; |
| 1344 | goto out_0; |
| 1345 | } |
| 1346 | |
| 1347 | netif_carrier_off(dev); |
| 1348 | |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 1349 | /* disable, mask and acknowledge all interrupts */ |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1350 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1351 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1352 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1353 | smsc9420_reg_write(pd, INT_CTL, 0); |
| 1354 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1355 | smsc9420_reg_write(pd, DMAC_INTR_ENA, 0); |
| 1356 | smsc9420_reg_write(pd, INT_STAT, 0xFFFFFFFF); |
| 1357 | smsc9420_pci_flush_write(pd); |
| 1358 | |
| 1359 | if (request_irq(dev->irq, smsc9420_isr, IRQF_SHARED | IRQF_DISABLED, |
| 1360 | DRV_NAME, pd)) { |
| 1361 | smsc_warn(IFUP, "Unable to use IRQ = %d", dev->irq); |
| 1362 | result = -ENODEV; |
| 1363 | goto out_0; |
| 1364 | } |
| 1365 | |
| 1366 | smsc9420_dmac_soft_reset(pd); |
| 1367 | |
| 1368 | /* make sure MAC_CR is sane */ |
| 1369 | smsc9420_reg_write(pd, MAC_CR, 0); |
| 1370 | |
| 1371 | smsc9420_set_mac_address(dev); |
| 1372 | |
| 1373 | /* Configure GPIO pins to drive LEDs */ |
| 1374 | smsc9420_reg_write(pd, GPIO_CFG, |
| 1375 | (GPIO_CFG_LED_3_ | GPIO_CFG_LED_2_ | GPIO_CFG_LED_1_)); |
| 1376 | |
| 1377 | bus_mode = BUS_MODE_DMA_BURST_LENGTH_16; |
| 1378 | |
| 1379 | #ifdef __BIG_ENDIAN |
| 1380 | bus_mode |= BUS_MODE_DBO_; |
| 1381 | #endif |
| 1382 | |
| 1383 | smsc9420_reg_write(pd, BUS_MODE, bus_mode); |
| 1384 | |
| 1385 | smsc9420_pci_flush_write(pd); |
| 1386 | |
| 1387 | /* set bus master bridge arbitration priority for Rx and TX DMA */ |
| 1388 | smsc9420_reg_write(pd, BUS_CFG, BUS_CFG_RXTXWEIGHT_4_1); |
| 1389 | |
| 1390 | smsc9420_reg_write(pd, DMAC_CONTROL, |
| 1391 | (DMAC_CONTROL_SF_ | DMAC_CONTROL_OSF_)); |
| 1392 | |
| 1393 | smsc9420_pci_flush_write(pd); |
| 1394 | |
| 1395 | /* test the IRQ connection to the ISR */ |
| 1396 | smsc_dbg(IFUP, "Testing ISR using IRQ %d", dev->irq); |
Steve Glendinning | 1609559 | 2009-01-29 17:29:15 -0800 | [diff] [blame] | 1397 | pd->software_irq_signal = false; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1398 | |
| 1399 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1400 | /* configure interrupt deassertion timer and enable interrupts */ |
| 1401 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; |
| 1402 | int_cfg &= ~(INT_CFG_INT_DEAS_MASK); |
| 1403 | int_cfg |= (INT_DEAS_TIME & INT_CFG_INT_DEAS_MASK); |
| 1404 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1405 | |
| 1406 | /* unmask software interrupt */ |
| 1407 | int_ctl = smsc9420_reg_read(pd, INT_CTL) | INT_CTL_SW_INT_EN_; |
| 1408 | smsc9420_reg_write(pd, INT_CTL, int_ctl); |
| 1409 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1410 | smsc9420_pci_flush_write(pd); |
| 1411 | |
| 1412 | timeout = 1000; |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1413 | while (timeout--) { |
| 1414 | if (pd->software_irq_signal) |
| 1415 | break; |
| 1416 | msleep(1); |
| 1417 | } |
| 1418 | |
| 1419 | /* disable interrupts */ |
| 1420 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1421 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1422 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1423 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1424 | |
| 1425 | if (!pd->software_irq_signal) { |
| 1426 | smsc_warn(IFUP, "ISR failed signaling test"); |
| 1427 | result = -ENODEV; |
| 1428 | goto out_free_irq_1; |
| 1429 | } |
| 1430 | |
| 1431 | smsc_dbg(IFUP, "ISR passed test using IRQ %d", dev->irq); |
| 1432 | |
| 1433 | result = smsc9420_alloc_tx_ring(pd); |
| 1434 | if (result) { |
| 1435 | smsc_warn(IFUP, "Failed to Initialize tx dma ring"); |
| 1436 | result = -ENOMEM; |
| 1437 | goto out_free_irq_1; |
| 1438 | } |
| 1439 | |
| 1440 | result = smsc9420_alloc_rx_ring(pd); |
| 1441 | if (result) { |
| 1442 | smsc_warn(IFUP, "Failed to Initialize rx dma ring"); |
| 1443 | result = -ENOMEM; |
| 1444 | goto out_free_tx_ring_2; |
| 1445 | } |
| 1446 | |
| 1447 | result = smsc9420_mii_init(dev); |
| 1448 | if (result) { |
| 1449 | smsc_warn(IFUP, "Failed to initialize Phy"); |
| 1450 | result = -ENODEV; |
| 1451 | goto out_free_rx_ring_3; |
| 1452 | } |
| 1453 | |
| 1454 | /* Bring the PHY up */ |
| 1455 | phy_start(pd->phy_dev); |
| 1456 | |
| 1457 | napi_enable(&pd->napi); |
| 1458 | |
| 1459 | /* start tx and rx */ |
| 1460 | mac_cr = smsc9420_reg_read(pd, MAC_CR) | MAC_CR_TXEN_ | MAC_CR_RXEN_; |
| 1461 | smsc9420_reg_write(pd, MAC_CR, mac_cr); |
| 1462 | |
| 1463 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); |
| 1464 | dmac_control |= DMAC_CONTROL_ST_ | DMAC_CONTROL_SR_; |
| 1465 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); |
| 1466 | smsc9420_pci_flush_write(pd); |
| 1467 | |
| 1468 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); |
| 1469 | dma_intr_ena |= |
| 1470 | (DMAC_INTR_ENA_TX_ | DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); |
| 1471 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); |
| 1472 | smsc9420_pci_flush_write(pd); |
| 1473 | |
| 1474 | netif_wake_queue(dev); |
| 1475 | |
| 1476 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); |
| 1477 | |
| 1478 | /* enable interrupts */ |
| 1479 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1480 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; |
| 1481 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1482 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1483 | |
| 1484 | return 0; |
| 1485 | |
| 1486 | out_free_rx_ring_3: |
| 1487 | smsc9420_free_rx_ring(pd); |
| 1488 | out_free_tx_ring_2: |
| 1489 | smsc9420_free_tx_ring(pd); |
| 1490 | out_free_irq_1: |
| 1491 | free_irq(dev->irq, pd); |
| 1492 | out_0: |
| 1493 | return result; |
| 1494 | } |
| 1495 | |
| 1496 | #ifdef CONFIG_PM |
| 1497 | |
| 1498 | static int smsc9420_suspend(struct pci_dev *pdev, pm_message_t state) |
| 1499 | { |
| 1500 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1501 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1502 | u32 int_cfg; |
| 1503 | ulong flags; |
| 1504 | |
| 1505 | /* disable interrupts */ |
| 1506 | spin_lock_irqsave(&pd->int_lock, flags); |
| 1507 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); |
| 1508 | smsc9420_reg_write(pd, INT_CFG, int_cfg); |
| 1509 | spin_unlock_irqrestore(&pd->int_lock, flags); |
| 1510 | |
| 1511 | if (netif_running(dev)) { |
| 1512 | netif_tx_disable(dev); |
| 1513 | smsc9420_stop_tx(pd); |
| 1514 | smsc9420_free_tx_ring(pd); |
| 1515 | |
| 1516 | napi_disable(&pd->napi); |
| 1517 | smsc9420_stop_rx(pd); |
| 1518 | smsc9420_free_rx_ring(pd); |
| 1519 | |
| 1520 | free_irq(dev->irq, pd); |
| 1521 | |
| 1522 | netif_device_detach(dev); |
| 1523 | } |
| 1524 | |
| 1525 | pci_save_state(pdev); |
| 1526 | pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); |
| 1527 | pci_disable_device(pdev); |
| 1528 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 1529 | |
| 1530 | return 0; |
| 1531 | } |
| 1532 | |
| 1533 | static int smsc9420_resume(struct pci_dev *pdev) |
| 1534 | { |
| 1535 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1536 | struct smsc9420_pdata *pd = netdev_priv(dev); |
| 1537 | int err; |
| 1538 | |
| 1539 | pci_set_power_state(pdev, PCI_D0); |
| 1540 | pci_restore_state(pdev); |
| 1541 | |
| 1542 | err = pci_enable_device(pdev); |
| 1543 | if (err) |
| 1544 | return err; |
| 1545 | |
| 1546 | pci_set_master(pdev); |
| 1547 | |
| 1548 | err = pci_enable_wake(pdev, 0, 0); |
| 1549 | if (err) |
| 1550 | smsc_warn(IFUP, "pci_enable_wake failed: %d", err); |
| 1551 | |
| 1552 | if (netif_running(dev)) { |
| 1553 | err = smsc9420_open(dev); |
| 1554 | netif_device_attach(dev); |
| 1555 | } |
| 1556 | return err; |
| 1557 | } |
| 1558 | |
| 1559 | #endif /* CONFIG_PM */ |
| 1560 | |
| 1561 | static const struct net_device_ops smsc9420_netdev_ops = { |
| 1562 | .ndo_open = smsc9420_open, |
| 1563 | .ndo_stop = smsc9420_stop, |
| 1564 | .ndo_start_xmit = smsc9420_hard_start_xmit, |
| 1565 | .ndo_get_stats = smsc9420_get_stats, |
| 1566 | .ndo_set_multicast_list = smsc9420_set_multicast_list, |
| 1567 | .ndo_do_ioctl = smsc9420_do_ioctl, |
| 1568 | .ndo_validate_addr = eth_validate_addr, |
Stephen Hemminger | fe96aaa | 2009-01-09 11:13:14 +0000 | [diff] [blame] | 1569 | .ndo_set_mac_address = eth_mac_addr, |
Steve Glendinning | e312674 | 2008-12-12 22:31:50 -0800 | [diff] [blame] | 1570 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1571 | .ndo_poll_controller = smsc9420_poll_controller, |
| 1572 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1573 | }; |
| 1574 | |
| 1575 | static int __devinit |
| 1576 | smsc9420_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 1577 | { |
| 1578 | struct net_device *dev; |
| 1579 | struct smsc9420_pdata *pd; |
| 1580 | void __iomem *virt_addr; |
| 1581 | int result = 0; |
| 1582 | u32 id_rev; |
| 1583 | |
| 1584 | printk(KERN_INFO DRV_DESCRIPTION " version " DRV_VERSION "\n"); |
| 1585 | |
| 1586 | /* First do the PCI initialisation */ |
| 1587 | result = pci_enable_device(pdev); |
| 1588 | if (unlikely(result)) { |
| 1589 | printk(KERN_ERR "Cannot enable smsc9420\n"); |
| 1590 | goto out_0; |
| 1591 | } |
| 1592 | |
| 1593 | pci_set_master(pdev); |
| 1594 | |
| 1595 | dev = alloc_etherdev(sizeof(*pd)); |
| 1596 | if (!dev) { |
| 1597 | printk(KERN_ERR "ether device alloc failed\n"); |
| 1598 | goto out_disable_pci_device_1; |
| 1599 | } |
| 1600 | |
| 1601 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 1602 | |
| 1603 | if (!(pci_resource_flags(pdev, SMSC_BAR) & IORESOURCE_MEM)) { |
| 1604 | printk(KERN_ERR "Cannot find PCI device base address\n"); |
| 1605 | goto out_free_netdev_2; |
| 1606 | } |
| 1607 | |
| 1608 | if ((pci_request_regions(pdev, DRV_NAME))) { |
| 1609 | printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n"); |
| 1610 | goto out_free_netdev_2; |
| 1611 | } |
| 1612 | |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 1613 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
Steve Glendinning | 2cb3772 | 2008-12-11 20:54:30 -0800 | [diff] [blame] | 1614 | printk(KERN_ERR "No usable DMA configuration, aborting.\n"); |
| 1615 | goto out_free_regions_3; |
| 1616 | } |
| 1617 | |
| 1618 | virt_addr = ioremap(pci_resource_start(pdev, SMSC_BAR), |
| 1619 | pci_resource_len(pdev, SMSC_BAR)); |
| 1620 | if (!virt_addr) { |
| 1621 | printk(KERN_ERR "Cannot map device registers, aborting.\n"); |
| 1622 | goto out_free_regions_3; |
| 1623 | } |
| 1624 | |
| 1625 | /* registers are double mapped with 0 offset for LE and 0x200 for BE */ |
| 1626 | virt_addr += LAN9420_CPSR_ENDIAN_OFFSET; |
| 1627 | |
| 1628 | dev->base_addr = (ulong)virt_addr; |
| 1629 | |
| 1630 | pd = netdev_priv(dev); |
| 1631 | |
| 1632 | /* pci descriptors are created in the PCI consistent area */ |
| 1633 | pd->rx_ring = pci_alloc_consistent(pdev, |
| 1634 | sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE + |
| 1635 | sizeof(struct smsc9420_dma_desc) * TX_RING_SIZE, |
| 1636 | &pd->rx_dma_addr); |
| 1637 | |
| 1638 | if (!pd->rx_ring) |
| 1639 | goto out_free_io_4; |
| 1640 | |
| 1641 | /* descriptors are aligned due to the nature of pci_alloc_consistent */ |
| 1642 | pd->tx_ring = (struct smsc9420_dma_desc *) |
| 1643 | (pd->rx_ring + RX_RING_SIZE); |
| 1644 | pd->tx_dma_addr = pd->rx_dma_addr + |
| 1645 | sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE; |
| 1646 | |
| 1647 | pd->pdev = pdev; |
| 1648 | pd->dev = dev; |
| 1649 | pd->base_addr = virt_addr; |
| 1650 | pd->msg_enable = smsc_debug; |
| 1651 | pd->rx_csum = true; |
| 1652 | |
| 1653 | smsc_dbg(PROBE, "lan_base=0x%08lx", (ulong)virt_addr); |
| 1654 | |
| 1655 | id_rev = smsc9420_reg_read(pd, ID_REV); |
| 1656 | switch (id_rev & 0xFFFF0000) { |
| 1657 | case 0x94200000: |
| 1658 | smsc_info(PROBE, "LAN9420 identified, ID_REV=0x%08X", id_rev); |
| 1659 | break; |
| 1660 | default: |
| 1661 | smsc_warn(PROBE, "LAN9420 NOT identified"); |
| 1662 | smsc_warn(PROBE, "ID_REV=0x%08X", id_rev); |
| 1663 | goto out_free_dmadesc_5; |
| 1664 | } |
| 1665 | |
| 1666 | smsc9420_dmac_soft_reset(pd); |
| 1667 | smsc9420_eeprom_reload(pd); |
| 1668 | smsc9420_check_mac_address(dev); |
| 1669 | |
| 1670 | dev->netdev_ops = &smsc9420_netdev_ops; |
| 1671 | dev->ethtool_ops = &smsc9420_ethtool_ops; |
| 1672 | dev->irq = pdev->irq; |
| 1673 | |
| 1674 | netif_napi_add(dev, &pd->napi, smsc9420_rx_poll, NAPI_WEIGHT); |
| 1675 | |
| 1676 | result = register_netdev(dev); |
| 1677 | if (result) { |
| 1678 | smsc_warn(PROBE, "error %i registering device", result); |
| 1679 | goto out_free_dmadesc_5; |
| 1680 | } |
| 1681 | |
| 1682 | pci_set_drvdata(pdev, dev); |
| 1683 | |
| 1684 | spin_lock_init(&pd->int_lock); |
| 1685 | spin_lock_init(&pd->phy_lock); |
| 1686 | |
| 1687 | dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr); |
| 1688 | |
| 1689 | return 0; |
| 1690 | |
| 1691 | out_free_dmadesc_5: |
| 1692 | pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) * |
| 1693 | (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr); |
| 1694 | out_free_io_4: |
| 1695 | iounmap(virt_addr - LAN9420_CPSR_ENDIAN_OFFSET); |
| 1696 | out_free_regions_3: |
| 1697 | pci_release_regions(pdev); |
| 1698 | out_free_netdev_2: |
| 1699 | free_netdev(dev); |
| 1700 | out_disable_pci_device_1: |
| 1701 | pci_disable_device(pdev); |
| 1702 | out_0: |
| 1703 | return -ENODEV; |
| 1704 | } |
| 1705 | |
| 1706 | static void __devexit smsc9420_remove(struct pci_dev *pdev) |
| 1707 | { |
| 1708 | struct net_device *dev; |
| 1709 | struct smsc9420_pdata *pd; |
| 1710 | |
| 1711 | dev = pci_get_drvdata(pdev); |
| 1712 | if (!dev) |
| 1713 | return; |
| 1714 | |
| 1715 | pci_set_drvdata(pdev, NULL); |
| 1716 | |
| 1717 | pd = netdev_priv(dev); |
| 1718 | unregister_netdev(dev); |
| 1719 | |
| 1720 | /* tx_buffers and rx_buffers are freed in stop */ |
| 1721 | BUG_ON(pd->tx_buffers); |
| 1722 | BUG_ON(pd->rx_buffers); |
| 1723 | |
| 1724 | BUG_ON(!pd->tx_ring); |
| 1725 | BUG_ON(!pd->rx_ring); |
| 1726 | |
| 1727 | pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) * |
| 1728 | (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr); |
| 1729 | |
| 1730 | iounmap(pd->base_addr - LAN9420_CPSR_ENDIAN_OFFSET); |
| 1731 | pci_release_regions(pdev); |
| 1732 | free_netdev(dev); |
| 1733 | pci_disable_device(pdev); |
| 1734 | } |
| 1735 | |
| 1736 | static struct pci_driver smsc9420_driver = { |
| 1737 | .name = DRV_NAME, |
| 1738 | .id_table = smsc9420_id_table, |
| 1739 | .probe = smsc9420_probe, |
| 1740 | .remove = __devexit_p(smsc9420_remove), |
| 1741 | #ifdef CONFIG_PM |
| 1742 | .suspend = smsc9420_suspend, |
| 1743 | .resume = smsc9420_resume, |
| 1744 | #endif /* CONFIG_PM */ |
| 1745 | }; |
| 1746 | |
| 1747 | static int __init smsc9420_init_module(void) |
| 1748 | { |
| 1749 | smsc_debug = netif_msg_init(debug, SMSC_MSG_DEFAULT); |
| 1750 | |
| 1751 | return pci_register_driver(&smsc9420_driver); |
| 1752 | } |
| 1753 | |
| 1754 | static void __exit smsc9420_exit_module(void) |
| 1755 | { |
| 1756 | pci_unregister_driver(&smsc9420_driver); |
| 1757 | } |
| 1758 | |
| 1759 | module_init(smsc9420_init_module); |
| 1760 | module_exit(smsc9420_exit_module); |