Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2002 Intersil Americas Inc. |
| 3 | * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org> |
| 4 | * Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/module.h> |
| 22 | |
| 23 | #include <linux/netdevice.h> |
Kai Engert | ff86a54 | 2006-12-12 21:09:41 +0100 | [diff] [blame] | 24 | #include <linux/ethtool.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/pci.h> |
| 26 | #include <linux/etherdevice.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/if_arp.h> |
| 29 | |
| 30 | #include <asm/io.h> |
| 31 | |
| 32 | #include "prismcompat.h" |
| 33 | #include "isl_38xx.h" |
| 34 | #include "isl_ioctl.h" |
| 35 | #include "islpci_dev.h" |
| 36 | #include "islpci_mgt.h" |
| 37 | #include "islpci_eth.h" |
| 38 | #include "oid_mgt.h" |
| 39 | |
| 40 | #define ISL3877_IMAGE_FILE "isl3877" |
| 41 | #define ISL3886_IMAGE_FILE "isl3886" |
| 42 | #define ISL3890_IMAGE_FILE "isl3890" |
| 43 | |
| 44 | static int prism54_bring_down(islpci_private *); |
| 45 | static int islpci_alloc_memory(islpci_private *); |
| 46 | static struct net_device_stats *islpci_statistics(struct net_device *); |
| 47 | |
| 48 | /* Temporary dummy MAC address to use until firmware is loaded. |
| 49 | * The idea there is that some tools (such as nameif) may query |
| 50 | * the MAC address before the netdev is 'open'. By using a valid |
| 51 | * OUI prefix, they can process the netdev properly. |
| 52 | * Of course, this is not the final/real MAC address. It doesn't |
| 53 | * matter, as you are suppose to be able to change it anytime via |
| 54 | * ndev->set_mac_address. Jean II */ |
| 55 | static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 }; |
| 56 | |
| 57 | static int |
| 58 | isl_upload_firmware(islpci_private *priv) |
| 59 | { |
| 60 | u32 reg, rc; |
| 61 | void __iomem *device_base = priv->device_base; |
| 62 | |
| 63 | /* clear the RAMBoot and the Reset bit */ |
| 64 | reg = readl(device_base + ISL38XX_CTRL_STAT_REG); |
| 65 | reg &= ~ISL38XX_CTRL_STAT_RESET; |
| 66 | reg &= ~ISL38XX_CTRL_STAT_RAMBOOT; |
| 67 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 68 | wmb(); |
| 69 | udelay(ISL38XX_WRITEIO_DELAY); |
| 70 | |
| 71 | /* set the Reset bit without reading the register ! */ |
| 72 | reg |= ISL38XX_CTRL_STAT_RESET; |
| 73 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 74 | wmb(); |
| 75 | udelay(ISL38XX_WRITEIO_DELAY); |
| 76 | |
| 77 | /* clear the Reset bit */ |
| 78 | reg &= ~ISL38XX_CTRL_STAT_RESET; |
| 79 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 80 | wmb(); |
| 81 | |
| 82 | /* wait a while for the device to reboot */ |
| 83 | mdelay(50); |
| 84 | |
| 85 | { |
| 86 | const struct firmware *fw_entry = NULL; |
| 87 | long fw_len; |
| 88 | const u32 *fw_ptr; |
| 89 | |
| 90 | rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV); |
| 91 | if (rc) { |
| 92 | printk(KERN_ERR |
| 93 | "%s: request_firmware() failed for '%s'\n", |
| 94 | "prism54", priv->firmware); |
| 95 | return rc; |
| 96 | } |
| 97 | /* prepare the Direct Memory Base register */ |
| 98 | reg = ISL38XX_DEV_FIRMWARE_ADDRES; |
| 99 | |
| 100 | fw_ptr = (u32 *) fw_entry->data; |
| 101 | fw_len = fw_entry->size; |
| 102 | |
| 103 | if (fw_len % 4) { |
| 104 | printk(KERN_ERR |
| 105 | "%s: firmware '%s' size is not multiple of 32bit, aborting!\n", |
| 106 | "prism54", priv->firmware); |
| 107 | release_firmware(fw_entry); |
| 108 | return -EILSEQ; /* Illegal byte sequence */; |
| 109 | } |
| 110 | |
| 111 | while (fw_len > 0) { |
| 112 | long _fw_len = |
| 113 | (fw_len > |
| 114 | ISL38XX_MEMORY_WINDOW_SIZE) ? |
| 115 | ISL38XX_MEMORY_WINDOW_SIZE : fw_len; |
| 116 | u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN; |
| 117 | |
Robert P. J. Day | beb7dd8 | 2007-05-09 07:14:03 +0200 | [diff] [blame] | 118 | /* set the card's base address for writing the data */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | isl38xx_w32_flush(device_base, reg, |
| 120 | ISL38XX_DIR_MEM_BASE_REG); |
| 121 | wmb(); /* be paranoid */ |
| 122 | |
| 123 | /* increment the write address for next iteration */ |
| 124 | reg += _fw_len; |
| 125 | fw_len -= _fw_len; |
| 126 | |
| 127 | /* write the data to the Direct Memory Window 32bit-wise */ |
| 128 | /* memcpy_toio() doesn't guarantee 32bit writes :-| */ |
| 129 | while (_fw_len > 0) { |
| 130 | /* use non-swapping writel() */ |
| 131 | __raw_writel(*fw_ptr, dev_fw_ptr); |
| 132 | fw_ptr++, dev_fw_ptr++; |
| 133 | _fw_len -= 4; |
| 134 | } |
| 135 | |
| 136 | /* flush PCI posting */ |
| 137 | (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH); |
| 138 | wmb(); /* be paranoid again */ |
| 139 | |
| 140 | BUG_ON(_fw_len != 0); |
| 141 | } |
| 142 | |
| 143 | BUG_ON(fw_len != 0); |
| 144 | |
| 145 | /* Firmware version is at offset 40 (also for "newmac") */ |
| 146 | printk(KERN_DEBUG "%s: firmware version: %.8s\n", |
| 147 | priv->ndev->name, fw_entry->data + 40); |
| 148 | |
| 149 | release_firmware(fw_entry); |
| 150 | } |
| 151 | |
| 152 | /* now reset the device |
| 153 | * clear the Reset & ClkRun bit, set the RAMBoot bit */ |
| 154 | reg = readl(device_base + ISL38XX_CTRL_STAT_REG); |
| 155 | reg &= ~ISL38XX_CTRL_STAT_CLKRUN; |
| 156 | reg &= ~ISL38XX_CTRL_STAT_RESET; |
| 157 | reg |= ISL38XX_CTRL_STAT_RAMBOOT; |
| 158 | isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG); |
| 159 | wmb(); |
| 160 | udelay(ISL38XX_WRITEIO_DELAY); |
| 161 | |
| 162 | /* set the reset bit latches the host override and RAMBoot bits |
| 163 | * into the device for operation when the reset bit is reset */ |
| 164 | reg |= ISL38XX_CTRL_STAT_RESET; |
| 165 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 166 | /* don't do flush PCI posting here! */ |
| 167 | wmb(); |
| 168 | udelay(ISL38XX_WRITEIO_DELAY); |
| 169 | |
| 170 | /* clear the reset bit should start the whole circus */ |
| 171 | reg &= ~ISL38XX_CTRL_STAT_RESET; |
| 172 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 173 | /* don't do flush PCI posting here! */ |
| 174 | wmb(); |
| 175 | udelay(ISL38XX_WRITEIO_DELAY); |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /****************************************************************************** |
| 181 | Device Interrupt Handler |
| 182 | ******************************************************************************/ |
| 183 | |
| 184 | irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 185 | islpci_interrupt(int irq, void *config) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | { |
| 187 | u32 reg; |
| 188 | islpci_private *priv = config; |
| 189 | struct net_device *ndev = priv->ndev; |
| 190 | void __iomem *device = priv->device_base; |
| 191 | int powerstate = ISL38XX_PSM_POWERSAVE_STATE; |
| 192 | |
| 193 | /* lock the interrupt handler */ |
| 194 | spin_lock(&priv->slock); |
| 195 | |
| 196 | /* received an interrupt request on a shared IRQ line |
| 197 | * first check whether the device is in sleep mode */ |
| 198 | reg = readl(device + ISL38XX_CTRL_STAT_REG); |
| 199 | if (reg & ISL38XX_CTRL_STAT_SLEEPMODE) |
| 200 | /* device is in sleep mode, IRQ was generated by someone else */ |
| 201 | { |
| 202 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 203 | DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); |
| 204 | #endif |
| 205 | spin_unlock(&priv->slock); |
| 206 | return IRQ_NONE; |
| 207 | } |
| 208 | |
| 209 | |
| 210 | /* check whether there is any source of interrupt on the device */ |
| 211 | reg = readl(device + ISL38XX_INT_IDENT_REG); |
| 212 | |
| 213 | /* also check the contents of the Interrupt Enable Register, because this |
| 214 | * will filter out interrupt sources from other devices on the same irq ! */ |
| 215 | reg &= readl(device + ISL38XX_INT_EN_REG); |
| 216 | reg &= ISL38XX_INT_SOURCES; |
| 217 | |
| 218 | if (reg != 0) { |
| 219 | if (islpci_get_state(priv) != PRV_STATE_SLEEP) |
| 220 | powerstate = ISL38XX_PSM_ACTIVE_STATE; |
| 221 | |
| 222 | /* reset the request bits in the Identification register */ |
| 223 | isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG); |
| 224 | |
| 225 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 226 | DEBUG(SHOW_FUNCTION_CALLS, |
| 227 | "IRQ: Identification register 0x%p 0x%x \n", device, reg); |
| 228 | #endif |
| 229 | |
| 230 | /* check for each bit in the register separately */ |
| 231 | if (reg & ISL38XX_INT_IDENT_UPDATE) { |
| 232 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 233 | /* Queue has been updated */ |
| 234 | DEBUG(SHOW_TRACING, "IRQ: Update flag \n"); |
| 235 | |
| 236 | DEBUG(SHOW_QUEUE_INDEXES, |
| 237 | "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n", |
| 238 | le32_to_cpu(priv->control_block-> |
| 239 | driver_curr_frag[0]), |
| 240 | le32_to_cpu(priv->control_block-> |
| 241 | driver_curr_frag[1]), |
| 242 | le32_to_cpu(priv->control_block-> |
| 243 | driver_curr_frag[2]), |
| 244 | le32_to_cpu(priv->control_block-> |
| 245 | driver_curr_frag[3]), |
| 246 | le32_to_cpu(priv->control_block-> |
| 247 | driver_curr_frag[4]), |
| 248 | le32_to_cpu(priv->control_block-> |
| 249 | driver_curr_frag[5]) |
| 250 | ); |
| 251 | |
| 252 | DEBUG(SHOW_QUEUE_INDEXES, |
| 253 | "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n", |
| 254 | le32_to_cpu(priv->control_block-> |
| 255 | device_curr_frag[0]), |
| 256 | le32_to_cpu(priv->control_block-> |
| 257 | device_curr_frag[1]), |
| 258 | le32_to_cpu(priv->control_block-> |
| 259 | device_curr_frag[2]), |
| 260 | le32_to_cpu(priv->control_block-> |
| 261 | device_curr_frag[3]), |
| 262 | le32_to_cpu(priv->control_block-> |
| 263 | device_curr_frag[4]), |
| 264 | le32_to_cpu(priv->control_block-> |
| 265 | device_curr_frag[5]) |
| 266 | ); |
| 267 | #endif |
| 268 | |
| 269 | /* cleanup the data low transmit queue */ |
| 270 | islpci_eth_cleanup_transmit(priv, priv->control_block); |
| 271 | |
| 272 | /* device is in active state, update the |
| 273 | * powerstate flag if necessary */ |
| 274 | powerstate = ISL38XX_PSM_ACTIVE_STATE; |
| 275 | |
| 276 | /* check all three queues in priority order |
| 277 | * call the PIMFOR receive function until the |
| 278 | * queue is empty */ |
| 279 | if (isl38xx_in_queue(priv->control_block, |
| 280 | ISL38XX_CB_RX_MGMTQ) != 0) { |
| 281 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 282 | DEBUG(SHOW_TRACING, |
| 283 | "Received frame in Management Queue\n"); |
| 284 | #endif |
| 285 | islpci_mgt_receive(ndev); |
| 286 | |
| 287 | islpci_mgt_cleanup_transmit(ndev); |
| 288 | |
| 289 | /* Refill slots in receive queue */ |
| 290 | islpci_mgmt_rx_fill(ndev); |
| 291 | |
| 292 | /* no need to trigger the device, next |
| 293 | islpci_mgt_transaction does it */ |
| 294 | } |
| 295 | |
| 296 | while (isl38xx_in_queue(priv->control_block, |
| 297 | ISL38XX_CB_RX_DATA_LQ) != 0) { |
| 298 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 299 | DEBUG(SHOW_TRACING, |
| 300 | "Received frame in Data Low Queue \n"); |
| 301 | #endif |
| 302 | islpci_eth_receive(priv); |
| 303 | } |
| 304 | |
| 305 | /* check whether the data transmit queues were full */ |
| 306 | if (priv->data_low_tx_full) { |
| 307 | /* check whether the transmit is not full anymore */ |
| 308 | if (ISL38XX_CB_TX_QSIZE - |
| 309 | isl38xx_in_queue(priv->control_block, |
| 310 | ISL38XX_CB_TX_DATA_LQ) >= |
| 311 | ISL38XX_MIN_QTHRESHOLD) { |
| 312 | /* nope, the driver is ready for more network frames */ |
| 313 | netif_wake_queue(priv->ndev); |
| 314 | |
| 315 | /* reset the full flag */ |
| 316 | priv->data_low_tx_full = 0; |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | if (reg & ISL38XX_INT_IDENT_INIT) { |
| 322 | /* Device has been initialized */ |
| 323 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 324 | DEBUG(SHOW_TRACING, |
| 325 | "IRQ: Init flag, device initialized \n"); |
| 326 | #endif |
| 327 | wake_up(&priv->reset_done); |
| 328 | } |
| 329 | |
| 330 | if (reg & ISL38XX_INT_IDENT_SLEEP) { |
| 331 | /* Device intends to move to powersave state */ |
| 332 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 333 | DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n"); |
| 334 | #endif |
| 335 | isl38xx_handle_sleep_request(priv->control_block, |
| 336 | &powerstate, |
| 337 | priv->device_base); |
| 338 | } |
| 339 | |
| 340 | if (reg & ISL38XX_INT_IDENT_WAKEUP) { |
| 341 | /* Device has been woken up to active state */ |
| 342 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 343 | DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n"); |
| 344 | #endif |
| 345 | |
| 346 | isl38xx_handle_wakeup(priv->control_block, |
| 347 | &powerstate, priv->device_base); |
| 348 | } |
| 349 | } else { |
| 350 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 351 | DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); |
| 352 | #endif |
| 353 | spin_unlock(&priv->slock); |
| 354 | return IRQ_NONE; |
| 355 | } |
| 356 | |
| 357 | /* sleep -> ready */ |
| 358 | if (islpci_get_state(priv) == PRV_STATE_SLEEP |
| 359 | && powerstate == ISL38XX_PSM_ACTIVE_STATE) |
| 360 | islpci_set_state(priv, PRV_STATE_READY); |
| 361 | |
| 362 | /* !sleep -> sleep */ |
| 363 | if (islpci_get_state(priv) != PRV_STATE_SLEEP |
| 364 | && powerstate == ISL38XX_PSM_POWERSAVE_STATE) |
| 365 | islpci_set_state(priv, PRV_STATE_SLEEP); |
| 366 | |
| 367 | /* unlock the interrupt handler */ |
| 368 | spin_unlock(&priv->slock); |
| 369 | |
| 370 | return IRQ_HANDLED; |
| 371 | } |
| 372 | |
| 373 | /****************************************************************************** |
| 374 | Network Interface Control & Statistical functions |
| 375 | ******************************************************************************/ |
| 376 | static int |
| 377 | islpci_open(struct net_device *ndev) |
| 378 | { |
| 379 | u32 rc; |
| 380 | islpci_private *priv = netdev_priv(ndev); |
| 381 | |
| 382 | /* reset data structures, upload firmware and reset device */ |
| 383 | rc = islpci_reset(priv,1); |
| 384 | if (rc) { |
| 385 | prism54_bring_down(priv); |
| 386 | return rc; /* Returns informative message */ |
| 387 | } |
| 388 | |
| 389 | netif_start_queue(ndev); |
Luis R. Rodriguez | 7b463ce | 2008-04-01 15:17:36 -0400 | [diff] [blame] | 390 | |
Luis R. Rodriguez | 85b442e | 2008-04-22 14:03:32 -0400 | [diff] [blame] | 391 | /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on |
| 392 | * once the firmware receives a trap of being associated |
| 393 | * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we |
| 394 | * should just leave the carrier on as its expected the firmware |
| 395 | * won't send us a trigger. */ |
| 396 | if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC) |
| 397 | netif_carrier_off(ndev); |
| 398 | else |
| 399 | netif_carrier_on(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int |
| 405 | islpci_close(struct net_device *ndev) |
| 406 | { |
| 407 | islpci_private *priv = netdev_priv(ndev); |
| 408 | |
| 409 | printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name); |
| 410 | |
| 411 | netif_stop_queue(ndev); |
| 412 | |
| 413 | return prism54_bring_down(priv); |
| 414 | } |
| 415 | |
| 416 | static int |
| 417 | prism54_bring_down(islpci_private *priv) |
| 418 | { |
| 419 | void __iomem *device_base = priv->device_base; |
| 420 | u32 reg; |
| 421 | /* we are going to shutdown the device */ |
| 422 | islpci_set_state(priv, PRV_STATE_PREBOOT); |
| 423 | |
| 424 | /* disable all device interrupts in case they weren't */ |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 425 | isl38xx_disable_interrupts(priv->device_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
| 427 | /* For safety reasons, we may want to ensure that no DMA transfer is |
| 428 | * currently in progress by emptying the TX and RX queues. */ |
| 429 | |
| 430 | /* wait until interrupts have finished executing on other CPUs */ |
| 431 | synchronize_irq(priv->pdev->irq); |
| 432 | |
| 433 | reg = readl(device_base + ISL38XX_CTRL_STAT_REG); |
| 434 | reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT); |
| 435 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 436 | wmb(); |
| 437 | udelay(ISL38XX_WRITEIO_DELAY); |
| 438 | |
| 439 | reg |= ISL38XX_CTRL_STAT_RESET; |
| 440 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 441 | wmb(); |
| 442 | udelay(ISL38XX_WRITEIO_DELAY); |
| 443 | |
| 444 | /* clear the Reset bit */ |
| 445 | reg &= ~ISL38XX_CTRL_STAT_RESET; |
| 446 | writel(reg, device_base + ISL38XX_CTRL_STAT_REG); |
| 447 | wmb(); |
| 448 | |
| 449 | /* wait a while for the device to reset */ |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 450 | schedule_timeout_uninterruptible(msecs_to_jiffies(50)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | static int |
| 456 | islpci_upload_fw(islpci_private *priv) |
| 457 | { |
| 458 | islpci_state_t old_state; |
| 459 | u32 rc; |
| 460 | |
| 461 | old_state = islpci_set_state(priv, PRV_STATE_BOOT); |
| 462 | |
| 463 | printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name); |
| 464 | |
| 465 | rc = isl_upload_firmware(priv); |
| 466 | if (rc) { |
| 467 | /* error uploading the firmware */ |
| 468 | printk(KERN_ERR "%s: could not upload firmware ('%s')\n", |
| 469 | priv->ndev->name, priv->firmware); |
| 470 | |
| 471 | islpci_set_state(priv, old_state); |
| 472 | return rc; |
| 473 | } |
| 474 | |
| 475 | printk(KERN_DEBUG "%s: firmware upload complete\n", |
| 476 | priv->ndev->name); |
| 477 | |
| 478 | islpci_set_state(priv, PRV_STATE_POSTBOOT); |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static int |
| 484 | islpci_reset_if(islpci_private *priv) |
| 485 | { |
| 486 | long remaining; |
| 487 | int result = -ETIME; |
| 488 | int count; |
| 489 | |
| 490 | DEFINE_WAIT(wait); |
| 491 | prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE); |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | /* now the last step is to reset the interface */ |
| 494 | isl38xx_interface_reset(priv->device_base, priv->device_host_address); |
| 495 | islpci_set_state(priv, PRV_STATE_PREINIT); |
| 496 | |
| 497 | for(count = 0; count < 2 && result; count++) { |
| 498 | /* The software reset acknowledge needs about 220 msec here. |
| 499 | * Be conservative and wait for up to one second. */ |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 500 | |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 501 | remaining = schedule_timeout_uninterruptible(HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
| 503 | if(remaining > 0) { |
| 504 | result = 0; |
| 505 | break; |
| 506 | } |
| 507 | |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 508 | /* If we're here it's because our IRQ hasn't yet gone through. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | * Retry a bit more... |
| 510 | */ |
| 511 | printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n", |
| 512 | priv->ndev->name); |
| 513 | } |
| 514 | |
| 515 | finish_wait(&priv->reset_done, &wait); |
| 516 | |
| 517 | if (result) { |
| 518 | printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); |
| 519 | return result; |
| 520 | } |
| 521 | |
| 522 | islpci_set_state(priv, PRV_STATE_INIT); |
| 523 | |
| 524 | /* Now that the device is 100% up, let's allow |
| 525 | * for the other interrupts -- |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 526 | * NOTE: this is not *yet* true since we've only allowed the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | * INIT interrupt on the IRQ line. We can perhaps poll |
| 528 | * the IRQ line until we know for sure the reset went through */ |
| 529 | isl38xx_enable_common_interrupts(priv->device_base); |
| 530 | |
| 531 | down_write(&priv->mib_sem); |
| 532 | result = mgt_commit(priv); |
| 533 | if (result) { |
| 534 | printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); |
| 535 | up_write(&priv->mib_sem); |
| 536 | return result; |
| 537 | } |
| 538 | up_write(&priv->mib_sem); |
| 539 | |
| 540 | islpci_set_state(priv, PRV_STATE_READY); |
| 541 | |
| 542 | printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name); |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | int |
| 547 | islpci_reset(islpci_private *priv, int reload_firmware) |
| 548 | { |
| 549 | isl38xx_control_block *cb = /* volatile not needed */ |
| 550 | (isl38xx_control_block *) priv->control_block; |
| 551 | unsigned counter; |
| 552 | int rc; |
| 553 | |
| 554 | if (reload_firmware) |
| 555 | islpci_set_state(priv, PRV_STATE_PREBOOT); |
| 556 | else |
| 557 | islpci_set_state(priv, PRV_STATE_POSTBOOT); |
| 558 | |
| 559 | printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name); |
| 560 | |
| 561 | /* disable all device interrupts in case they weren't */ |
| 562 | isl38xx_disable_interrupts(priv->device_base); |
| 563 | |
| 564 | /* flush all management queues */ |
| 565 | priv->index_mgmt_tx = 0; |
| 566 | priv->index_mgmt_rx = 0; |
| 567 | |
| 568 | /* clear the indexes in the frame pointer */ |
| 569 | for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { |
| 570 | cb->driver_curr_frag[counter] = cpu_to_le32(0); |
| 571 | cb->device_curr_frag[counter] = cpu_to_le32(0); |
| 572 | } |
| 573 | |
| 574 | /* reset the mgmt receive queue */ |
| 575 | for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { |
| 576 | isl38xx_fragment *frag = &cb->rx_data_mgmt[counter]; |
| 577 | frag->size = cpu_to_le16(MGMT_FRAME_SIZE); |
| 578 | frag->flags = 0; |
| 579 | frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr); |
| 580 | } |
| 581 | |
| 582 | for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { |
| 583 | cb->rx_data_low[counter].address = |
| 584 | cpu_to_le32((u32) priv->pci_map_rx_address[counter]); |
| 585 | } |
| 586 | |
| 587 | /* since the receive queues are filled with empty fragments, now we can |
| 588 | * set the corresponding indexes in the Control Block */ |
| 589 | priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] = |
| 590 | cpu_to_le32(ISL38XX_CB_RX_QSIZE); |
| 591 | priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] = |
| 592 | cpu_to_le32(ISL38XX_CB_MGMT_QSIZE); |
| 593 | |
| 594 | /* reset the remaining real index registers and full flags */ |
| 595 | priv->free_data_rx = 0; |
| 596 | priv->free_data_tx = 0; |
| 597 | priv->data_low_tx_full = 0; |
| 598 | |
| 599 | if (reload_firmware) { /* Should we load the firmware ? */ |
| 600 | /* now that the data structures are cleaned up, upload |
| 601 | * firmware and reset interface */ |
| 602 | rc = islpci_upload_fw(priv); |
| 603 | if (rc) { |
| 604 | printk(KERN_ERR "%s: islpci_reset: failure\n", |
| 605 | priv->ndev->name); |
| 606 | return rc; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | /* finally reset interface */ |
| 611 | rc = islpci_reset_if(priv); |
| 612 | if (rc) |
| 613 | printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n"); |
| 614 | return rc; |
| 615 | } |
| 616 | |
| 617 | static struct net_device_stats * |
| 618 | islpci_statistics(struct net_device *ndev) |
| 619 | { |
| 620 | islpci_private *priv = netdev_priv(ndev); |
| 621 | |
| 622 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 623 | DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n"); |
| 624 | #endif |
| 625 | |
| 626 | return &priv->statistics; |
| 627 | } |
| 628 | |
| 629 | /****************************************************************************** |
| 630 | Network device configuration functions |
| 631 | ******************************************************************************/ |
| 632 | static int |
| 633 | islpci_alloc_memory(islpci_private *priv) |
| 634 | { |
| 635 | int counter; |
| 636 | |
| 637 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 638 | printk(KERN_DEBUG "islpci_alloc_memory\n"); |
| 639 | #endif |
| 640 | |
| 641 | /* remap the PCI device base address to accessable */ |
| 642 | if (!(priv->device_base = |
| 643 | ioremap(pci_resource_start(priv->pdev, 0), |
| 644 | ISL38XX_PCI_MEM_SIZE))) { |
| 645 | /* error in remapping the PCI device memory address range */ |
| 646 | printk(KERN_ERR "PCI memory remapping failed \n"); |
| 647 | return -1; |
| 648 | } |
| 649 | |
| 650 | /* memory layout for consistent DMA region: |
| 651 | * |
| 652 | * Area 1: Control Block for the device interface |
| 653 | * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that |
| 654 | * the number of supported stations in the AP determines the minimal |
| 655 | * size of the buffer ! |
| 656 | */ |
| 657 | |
| 658 | /* perform the allocation */ |
| 659 | priv->driver_mem_address = pci_alloc_consistent(priv->pdev, |
| 660 | HOST_MEM_BLOCK, |
| 661 | &priv-> |
| 662 | device_host_address); |
| 663 | |
| 664 | if (!priv->driver_mem_address) { |
| 665 | /* error allocating the block of PCI memory */ |
| 666 | printk(KERN_ERR "%s: could not allocate DMA memory, aborting!", |
| 667 | "prism54"); |
| 668 | return -1; |
| 669 | } |
| 670 | |
| 671 | /* assign the Control Block to the first address of the allocated area */ |
| 672 | priv->control_block = |
| 673 | (isl38xx_control_block *) priv->driver_mem_address; |
| 674 | |
| 675 | /* set the Power Save Buffer pointer directly behind the CB */ |
| 676 | priv->device_psm_buffer = |
| 677 | priv->device_host_address + CONTROL_BLOCK_SIZE; |
| 678 | |
| 679 | /* make sure all buffer pointers are initialized */ |
| 680 | for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { |
| 681 | priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0); |
| 682 | priv->control_block->device_curr_frag[counter] = cpu_to_le32(0); |
| 683 | } |
| 684 | |
| 685 | priv->index_mgmt_rx = 0; |
| 686 | memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx)); |
| 687 | memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx)); |
| 688 | |
| 689 | /* allocate rx queue for management frames */ |
| 690 | if (islpci_mgmt_rx_fill(priv->ndev) < 0) |
| 691 | goto out_free; |
| 692 | |
| 693 | /* now get the data rx skb's */ |
| 694 | memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx)); |
| 695 | memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address)); |
| 696 | |
| 697 | for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { |
| 698 | struct sk_buff *skb; |
| 699 | |
| 700 | /* allocate an sk_buff for received data frames storage |
| 701 | * each frame on receive size consists of 1 fragment |
| 702 | * include any required allignment operations */ |
| 703 | if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) { |
| 704 | /* error allocating an sk_buff structure elements */ |
| 705 | printk(KERN_ERR "Error allocating skb.\n"); |
| 706 | skb = NULL; |
| 707 | goto out_free; |
| 708 | } |
| 709 | skb_reserve(skb, (4 - (long) skb->data) & 0x03); |
| 710 | /* add the new allocated sk_buff to the buffer array */ |
| 711 | priv->data_low_rx[counter] = skb; |
| 712 | |
| 713 | /* map the allocated skb data area to pci */ |
| 714 | priv->pci_map_rx_address[counter] = |
| 715 | pci_map_single(priv->pdev, (void *) skb->data, |
| 716 | MAX_FRAGMENT_SIZE_RX + 2, |
| 717 | PCI_DMA_FROMDEVICE); |
| 718 | if (!priv->pci_map_rx_address[counter]) { |
| 719 | /* error mapping the buffer to device |
| 720 | accessable memory address */ |
| 721 | printk(KERN_ERR "failed to map skb DMA'able\n"); |
| 722 | goto out_free; |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | prism54_acl_init(&priv->acl); |
Dan Williams | eab411f | 2006-07-17 21:21:47 -0400 | [diff] [blame] | 727 | prism54_wpa_bss_ie_init(priv); |
Dmitry Torokhov | 93b2dd1 | 2006-10-08 00:38:15 -0400 | [diff] [blame] | 728 | if (mgt_init(priv)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | goto out_free; |
| 730 | |
| 731 | return 0; |
| 732 | out_free: |
| 733 | islpci_free_memory(priv); |
| 734 | return -1; |
| 735 | } |
| 736 | |
| 737 | int |
| 738 | islpci_free_memory(islpci_private *priv) |
| 739 | { |
| 740 | int counter; |
| 741 | |
| 742 | if (priv->device_base) |
| 743 | iounmap(priv->device_base); |
| 744 | priv->device_base = NULL; |
| 745 | |
| 746 | /* free consistent DMA area... */ |
| 747 | if (priv->driver_mem_address) |
| 748 | pci_free_consistent(priv->pdev, HOST_MEM_BLOCK, |
| 749 | priv->driver_mem_address, |
| 750 | priv->device_host_address); |
| 751 | |
| 752 | /* clear some dangling pointers */ |
| 753 | priv->driver_mem_address = NULL; |
| 754 | priv->device_host_address = 0; |
| 755 | priv->device_psm_buffer = 0; |
| 756 | priv->control_block = NULL; |
| 757 | |
| 758 | /* clean up mgmt rx buffers */ |
| 759 | for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { |
| 760 | struct islpci_membuf *buf = &priv->mgmt_rx[counter]; |
| 761 | if (buf->pci_addr) |
| 762 | pci_unmap_single(priv->pdev, buf->pci_addr, |
| 763 | buf->size, PCI_DMA_FROMDEVICE); |
| 764 | buf->pci_addr = 0; |
Jesper Juhl | b4558ea | 2005-10-28 16:53:13 -0400 | [diff] [blame] | 765 | kfree(buf->mem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | buf->size = 0; |
| 767 | buf->mem = NULL; |
| 768 | } |
| 769 | |
| 770 | /* clean up data rx buffers */ |
| 771 | for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { |
| 772 | if (priv->pci_map_rx_address[counter]) |
| 773 | pci_unmap_single(priv->pdev, |
| 774 | priv->pci_map_rx_address[counter], |
| 775 | MAX_FRAGMENT_SIZE_RX + 2, |
| 776 | PCI_DMA_FROMDEVICE); |
| 777 | priv->pci_map_rx_address[counter] = 0; |
| 778 | |
| 779 | if (priv->data_low_rx[counter]) |
| 780 | dev_kfree_skb(priv->data_low_rx[counter]); |
| 781 | priv->data_low_rx[counter] = NULL; |
| 782 | } |
| 783 | |
| 784 | /* Free the acces control list and the WPA list */ |
| 785 | prism54_acl_clean(&priv->acl); |
Dan Williams | eab411f | 2006-07-17 21:21:47 -0400 | [diff] [blame] | 786 | prism54_wpa_bss_ie_clean(priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | mgt_clean(priv); |
| 788 | |
| 789 | return 0; |
| 790 | } |
| 791 | |
| 792 | #if 0 |
| 793 | static void |
| 794 | islpci_set_multicast_list(struct net_device *dev) |
| 795 | { |
| 796 | /* put device into promisc mode and let network layer handle it */ |
| 797 | } |
| 798 | #endif |
| 799 | |
Kai Engert | ff86a54 | 2006-12-12 21:09:41 +0100 | [diff] [blame] | 800 | static void islpci_ethtool_get_drvinfo(struct net_device *dev, |
| 801 | struct ethtool_drvinfo *info) |
| 802 | { |
| 803 | strcpy(info->driver, DRV_NAME); |
| 804 | strcpy(info->version, DRV_VERSION); |
| 805 | } |
| 806 | |
| 807 | static struct ethtool_ops islpci_ethtool_ops = { |
| 808 | .get_drvinfo = islpci_ethtool_get_drvinfo, |
| 809 | }; |
| 810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | struct net_device * |
| 812 | islpci_setup(struct pci_dev *pdev) |
| 813 | { |
| 814 | islpci_private *priv; |
| 815 | struct net_device *ndev = alloc_etherdev(sizeof (islpci_private)); |
| 816 | |
| 817 | if (!ndev) |
| 818 | return ndev; |
| 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | pci_set_drvdata(pdev, ndev); |
| 821 | #if defined(SET_NETDEV_DEV) |
| 822 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 823 | #endif |
| 824 | |
| 825 | /* setup the structure members */ |
| 826 | ndev->base_addr = pci_resource_start(pdev, 0); |
| 827 | ndev->irq = pdev->irq; |
| 828 | |
| 829 | /* initialize the function pointers */ |
| 830 | ndev->open = &islpci_open; |
| 831 | ndev->stop = &islpci_close; |
| 832 | ndev->get_stats = &islpci_statistics; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | ndev->do_ioctl = &prism54_ioctl; |
| 834 | ndev->wireless_handlers = |
| 835 | (struct iw_handler_def *) &prism54_handler_def; |
Kai Engert | ff86a54 | 2006-12-12 21:09:41 +0100 | [diff] [blame] | 836 | ndev->ethtool_ops = &islpci_ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
| 838 | ndev->hard_start_xmit = &islpci_eth_transmit; |
| 839 | /* ndev->set_multicast_list = &islpci_set_multicast_list; */ |
| 840 | ndev->addr_len = ETH_ALEN; |
| 841 | ndev->set_mac_address = &prism54_set_mac_address; |
| 842 | /* Get a non-zero dummy MAC address for nameif. Jean II */ |
| 843 | memcpy(ndev->dev_addr, dummy_mac, 6); |
| 844 | |
| 845 | #ifdef HAVE_TX_TIMEOUT |
| 846 | ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT; |
| 847 | ndev->tx_timeout = &islpci_eth_tx_timeout; |
| 848 | #endif |
| 849 | |
| 850 | /* allocate a private device structure to the network device */ |
| 851 | priv = netdev_priv(ndev); |
| 852 | priv->ndev = ndev; |
| 853 | priv->pdev = pdev; |
| 854 | priv->monitor_type = ARPHRD_IEEE80211; |
| 855 | priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ? |
| 856 | priv->monitor_type : ARPHRD_ETHER; |
| 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | /* Add pointers to enable iwspy support. */ |
| 859 | priv->wireless_data.spy_data = &priv->spy_data; |
| 860 | ndev->wireless_data = &priv->wireless_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
| 862 | /* save the start and end address of the PCI memory area */ |
| 863 | ndev->mem_start = (unsigned long) priv->device_base; |
| 864 | ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE; |
| 865 | |
| 866 | #if VERBOSE > SHOW_ERROR_MESSAGES |
| 867 | DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base); |
| 868 | #endif |
| 869 | |
| 870 | init_waitqueue_head(&priv->reset_done); |
| 871 | |
| 872 | /* init the queue read locks, process wait counter */ |
Matthias Kaehlcke | 1b34fd3 | 2007-11-05 09:41:01 +0100 | [diff] [blame] | 873 | mutex_init(&priv->mgmt_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | priv->mgmt_received = NULL; |
| 875 | init_waitqueue_head(&priv->mgmt_wqueue); |
Matthias Kaehlcke | f813921 | 2008-02-15 20:56:59 +0100 | [diff] [blame] | 876 | mutex_init(&priv->stats_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | spin_lock_init(&priv->slock); |
| 878 | |
| 879 | /* init state machine with off#1 state */ |
| 880 | priv->state = PRV_STATE_OFF; |
| 881 | priv->state_off = 1; |
| 882 | |
| 883 | /* initialize workqueue's */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 884 | INIT_WORK(&priv->stats_work, prism54_update_stats); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | priv->stats_timestamp = 0; |
| 886 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 887 | INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | priv->reset_task_pending = 0; |
| 889 | |
| 890 | /* allocate various memory areas */ |
| 891 | if (islpci_alloc_memory(priv)) |
| 892 | goto do_free_netdev; |
| 893 | |
| 894 | /* select the firmware file depending on the device id */ |
| 895 | switch (pdev->device) { |
| 896 | case 0x3877: |
| 897 | strcpy(priv->firmware, ISL3877_IMAGE_FILE); |
| 898 | break; |
| 899 | |
| 900 | case 0x3886: |
| 901 | strcpy(priv->firmware, ISL3886_IMAGE_FILE); |
| 902 | break; |
| 903 | |
| 904 | default: |
| 905 | strcpy(priv->firmware, ISL3890_IMAGE_FILE); |
| 906 | break; |
| 907 | } |
| 908 | |
| 909 | if (register_netdev(ndev)) { |
| 910 | DEBUG(SHOW_ERROR_MESSAGES, |
| 911 | "ERROR: register_netdev() failed \n"); |
| 912 | goto do_islpci_free_memory; |
| 913 | } |
| 914 | |
| 915 | return ndev; |
| 916 | |
| 917 | do_islpci_free_memory: |
| 918 | islpci_free_memory(priv); |
| 919 | do_free_netdev: |
| 920 | pci_set_drvdata(pdev, NULL); |
| 921 | free_netdev(ndev); |
| 922 | priv = NULL; |
| 923 | return NULL; |
| 924 | } |
| 925 | |
| 926 | islpci_state_t |
| 927 | islpci_set_state(islpci_private *priv, islpci_state_t new_state) |
| 928 | { |
| 929 | islpci_state_t old_state; |
| 930 | |
| 931 | /* lock */ |
| 932 | old_state = priv->state; |
| 933 | |
| 934 | /* this means either a race condition or some serious error in |
| 935 | * the driver code */ |
| 936 | switch (new_state) { |
| 937 | case PRV_STATE_OFF: |
| 938 | priv->state_off++; |
| 939 | default: |
| 940 | priv->state = new_state; |
| 941 | break; |
| 942 | |
| 943 | case PRV_STATE_PREBOOT: |
| 944 | /* there are actually many off-states, enumerated by |
| 945 | * state_off */ |
| 946 | if (old_state == PRV_STATE_OFF) |
| 947 | priv->state_off--; |
| 948 | |
| 949 | /* only if hw_unavailable is zero now it means we either |
| 950 | * were in off#1 state, or came here from |
| 951 | * somewhere else */ |
| 952 | if (!priv->state_off) |
| 953 | priv->state = new_state; |
| 954 | break; |
| 955 | }; |
| 956 | #if 0 |
| 957 | printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n", |
| 958 | priv->ndev->name, old_state, new_state, priv->state_off); |
| 959 | #endif |
| 960 | |
| 961 | /* invariants */ |
| 962 | BUG_ON(priv->state_off < 0); |
| 963 | BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF)); |
| 964 | BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF)); |
| 965 | |
| 966 | /* unlock */ |
| 967 | return old_state; |
| 968 | } |