drivers/net/wireless/p54/p54pci.c

   1
   2 /*
   3  * Linux device driver for PCI based Prism54
   4  *
   5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   6  * Copyright (c) 2008, Christian Lamparter <chunkeey@web.de>
   7  *
   8  * Based on the islsm (softmac prism54) driver, which is:
   9  * Copyright 2004-2006 Jean-Baptiste Note <jean-baptiste.note@m4x.org>, et al.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/pci.h>
  18 #include <linux/slab.h>
  19 #include <linux/firmware.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/delay.h>
  22 #include <linux/completion.h>
  23 #include <net/mac80211.h>
  24
  25 #include "p54.h"
  26 #include "lmac.h"
  27 #include "p54pci.h"
  28
  29 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  30 MODULE_DESCRIPTION("Prism54 PCI wireless driver");
  31 MODULE_LICENSE("GPL");
  32 MODULE_ALIAS("prism54pci");
  33 MODULE_FIRMWARE("isl3886pci");
  34
  35 static DEFINE_PCI_DEVICE_TABLE(p54p_table) = {
  36         /* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
  37         { PCI_DEVICE(0x1260, 0x3890) },
  38         /* 3COM 3CRWE154G72 Wireless LAN adapter */
  39         { PCI_DEVICE(0x10b7, 0x6001) },
  40         /* Intersil PRISM Indigo Wireless LAN adapter */
  41         { PCI_DEVICE(0x1260, 0x3877) },
  42         /* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
  43         { PCI_DEVICE(0x1260, 0x3886) },
  44         /* Intersil PRISM Xbow Wireless LAN adapter (Symbol AP-300) */
  45         { PCI_DEVICE(0x1260, 0xffff) },
  46         { },
  47 };
  48
  49 MODULE_DEVICE_TABLE(pci, p54p_table);
  50
  51 static int p54p_upload_firmware(struct ieee80211_hw *dev)
  52 {
  53         struct p54p_priv *priv = dev->priv;
  54         __le32 reg;
  55         int err;
  56         __le32 *data;
  57         u32 remains, left, device_addr;
  58
  59         P54P_WRITE(int_enable, cpu_to_le32(0));
  60         P54P_READ(int_enable);
  61         udelay(10);
  62
  63         reg = P54P_READ(ctrl_stat);
  64         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
  65         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
  66         P54P_WRITE(ctrl_stat, reg);
  67         P54P_READ(ctrl_stat);
  68         udelay(10);
  69
  70         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
  71         P54P_WRITE(ctrl_stat, reg);
  72         wmb();
  73         udelay(10);
  74
  75         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
  76         P54P_WRITE(ctrl_stat, reg);
  77         wmb();
  78
  79         /* wait for the firmware to reset properly */
  80         mdelay(10);
  81
  82         err = p54_parse_firmware(dev, priv->firmware);
  83         if (err)
  84                 return err;
  85
  86         if (priv->common.fw_interface != FW_LM86) {
  87                 dev_err(&priv->pdev->dev, "wrong firmware, "
  88                         "please get a LM86(PCI) firmware a try again.\n");
  89                 return -EINVAL;
  90         }
  91
  92         data = (__le32 *) priv->firmware->data;
  93         remains = priv->firmware->size;
  94         device_addr = ISL38XX_DEV_FIRMWARE_ADDR;
  95         while (remains) {
  96                 u32 i = 0;
  97                 left = min((u32)0x1000, remains);
  98                 P54P_WRITE(direct_mem_base, cpu_to_le32(device_addr));
  99                 P54P_READ(int_enable);
 100
 101                 device_addr += 0x1000;
 102                 while (i < left) {
 103                         P54P_WRITE(direct_mem_win[i], *data++);
 104                         i += sizeof(u32);
 105                 }
 106
 107                 remains -= left;
 108                 P54P_READ(int_enable);
 109         }
 110
 111         reg = P54P_READ(ctrl_stat);
 112         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
 113         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
 114         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
 115         P54P_WRITE(ctrl_stat, reg);
 116         P54P_READ(ctrl_stat);
 117         udelay(10);
 118
 119         reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
 120         P54P_WRITE(ctrl_stat, reg);
 121         wmb();
 122         udelay(10);
 123
 124         reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
 125         P54P_WRITE(ctrl_stat, reg);
 126         wmb();
 127         udelay(10);
 128
 129         /* wait for the firmware to boot properly */
 130         mdelay(100);
 131
 132         return 0;
 133 }
 134
 135 static void p54p_refill_rx_ring(struct ieee80211_hw *dev,
 136         int ring_index, struct p54p_desc *ring, u32 ring_limit,
 137         struct sk_buff **rx_buf, u32 index)
 138 {
 139         struct p54p_priv *priv = dev->priv;
 140         struct p54p_ring_control *ring_control = priv->ring_control;
 141         u32 limit, idx, i;
 142
 143         idx = le32_to_cpu(ring_control->host_idx[ring_index]);
 144         limit = idx;
 145         limit -= index;
 146         limit = ring_limit - limit;
 147
 148         i = idx % ring_limit;
 149         while (limit-- > 1) {
 150                 struct p54p_desc *desc = &ring[i];
 151
 152                 if (!desc->host_addr) {
 153                         struct sk_buff *skb;
 154                         dma_addr_t mapping;
 155                         skb = dev_alloc_skb(priv->common.rx_mtu + 32);
 156                         if (!skb)
 157                                 break;
 158
 159                         mapping = pci_map_single(priv->pdev,
 160                                                  skb_tail_pointer(skb),
 161                                                  priv->common.rx_mtu + 32,
 162                                                  PCI_DMA_FROMDEVICE);
 163
 164                         if (pci_dma_mapping_error(priv->pdev, mapping)) {
 165                                 dev_kfree_skb_any(skb);
 166                                 dev_err(&priv->pdev->dev,
 167                                         "RX DMA Mapping error\n");
 168                                 break;
 169                         }
 170
 171                         desc->host_addr = cpu_to_le32(mapping);
 172                         desc->device_addr = 0;  // FIXME: necessary?
 173                         desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
 174                         desc->flags = 0;
 175                         rx_buf[i] = skb;
 176                 }
 177
 178                 i++;
 179                 idx++;
 180                 i %= ring_limit;
 181         }
 182
 183         wmb();
 184         ring_control->host_idx[ring_index] = cpu_to_le32(idx);
 185 }
 186
 187 static void p54p_check_rx_ring(struct ieee80211_hw *dev, u32 *index,
 188         int ring_index, struct p54p_desc *ring, u32 ring_limit,
 189         struct sk_buff **rx_buf)
 190 {
 191         struct p54p_priv *priv = dev->priv;
 192         struct p54p_ring_control *ring_control = priv->ring_control;
 193         struct p54p_desc *desc;
 194         u32 idx, i;
 195
 196         i = (*index) % ring_limit;
 197         (*index) = idx = le32_to_cpu(ring_control->device_idx[ring_index]);
 198         idx %= ring_limit;
 199         while (i != idx) {
 200                 u16 len;
 201                 struct sk_buff *skb;
 202                 desc = &ring[i];
 203                 len = le16_to_cpu(desc->len);
 204                 skb = rx_buf[i];
 205
 206                 if (!skb) {
 207                         i++;
 208                         i %= ring_limit;
 209                         continue;
 210                 }
 211
 212                 if (unlikely(len > priv->common.rx_mtu)) {
 213                         if (net_ratelimit())
 214                                 dev_err(&priv->pdev->dev, "rx'd frame size "
 215                                         "exceeds length threshold.\n");
 216
 217                         len = priv->common.rx_mtu;
 218                 }
 219                 skb_put(skb, len);
 220
 221                 if (p54_rx(dev, skb)) {
 222                         pci_unmap_single(priv->pdev,
 223                                          le32_to_cpu(desc->host_addr),
 224                                          priv->common.rx_mtu + 32,
 225                                          PCI_DMA_FROMDEVICE);
 226                         rx_buf[i] = NULL;
 227                         desc->host_addr = 0;
 228                 } else {
 229                         skb_trim(skb, 0);
 230                         desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
 231                 }
 232
 233                 i++;
 234                 i %= ring_limit;
 235         }
 236
 237         p54p_refill_rx_ring(dev, ring_index, ring, ring_limit, rx_buf, *index);
 238 }
 239
 240 static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
 241         int ring_index, struct p54p_desc *ring, u32 ring_limit,
 242         struct sk_buff **tx_buf)
 243 {
 244         struct p54p_priv *priv = dev->priv;
 245         struct p54p_ring_control *ring_control = priv->ring_control;
 246         struct p54p_desc *desc;
 247         struct sk_buff *skb;
 248         u32 idx, i;
 249
 250         i = (*index) % ring_limit;
 251         (*index) = idx = le32_to_cpu(ring_control->device_idx[ring_index]);
 252         idx %= ring_limit;
 253
 254         while (i != idx) {
 255                 desc = &ring[i];
 256
 257                 skb = tx_buf[i];
 258                 tx_buf[i] = NULL;
 259
 260                 pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr),
 261                                  le16_to_cpu(desc->len), PCI_DMA_TODEVICE);
 262
 263                 desc->host_addr = 0;
 264                 desc->device_addr = 0;
 265                 desc->len = 0;
 266                 desc->flags = 0;
 267
 268                 if (skb && FREE_AFTER_TX(skb))
 269                         p54_free_skb(dev, skb);
 270
 271                 i++;
 272                 i %= ring_limit;
 273         }
 274 }
 275
 276 static void p54p_tasklet(unsigned long dev_id)
 277 {
 278         struct ieee80211_hw *dev = (struct ieee80211_hw *)dev_id;
 279         struct p54p_priv *priv = dev->priv;
 280         struct p54p_ring_control *ring_control = priv->ring_control;
 281
 282         p54p_check_tx_ring(dev, &priv->tx_idx_mgmt, 3, ring_control->tx_mgmt,
 283                            ARRAY_SIZE(ring_control->tx_mgmt),
 284                            priv->tx_buf_mgmt);
 285
 286         p54p_check_tx_ring(dev, &priv->tx_idx_data, 1, ring_control->tx_data,
 287                            ARRAY_SIZE(ring_control->tx_data),
 288                            priv->tx_buf_data);
 289
 290         p54p_check_rx_ring(dev, &priv->rx_idx_mgmt, 2, ring_control->rx_mgmt,
 291                 ARRAY_SIZE(ring_control->rx_mgmt), priv->rx_buf_mgmt);
 292
 293         p54p_check_rx_ring(dev, &priv->rx_idx_data, 0, ring_control->rx_data,
 294                 ARRAY_SIZE(ring_control->rx_data), priv->rx_buf_data);
 295
 296         wmb();
 297         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
 298 }
 299
 300 static irqreturn_t p54p_interrupt(int irq, void *dev_id)
 301 {
 302         struct ieee80211_hw *dev = dev_id;
 303         struct p54p_priv *priv = dev->priv;
 304         __le32 reg;
 305
 306         reg = P54P_READ(int_ident);
 307         if (unlikely(reg == cpu_to_le32(0xFFFFFFFF))) {
 308                 goto out;
 309         }
 310         P54P_WRITE(int_ack, reg);
 311
 312         reg &= P54P_READ(int_enable);
 313
 314         if (reg & cpu_to_le32(ISL38XX_INT_IDENT_UPDATE))
 315                 tasklet_schedule(&priv->tasklet);
 316         else if (reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT))
 317                 complete(&priv->boot_comp);
 318
 319 out:
 320         return reg ? IRQ_HANDLED : IRQ_NONE;
 321 }
 322
 323 static void p54p_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 324 {
 325         unsigned long flags;
 326         struct p54p_priv *priv = dev->priv;
 327         struct p54p_ring_control *ring_control = priv->ring_control;
 328         struct p54p_desc *desc;
 329         dma_addr_t mapping;
 330         u32 device_idx, idx, i;
 331
 332         spin_lock_irqsave(&priv->lock, flags);
 333         device_idx = le32_to_cpu(ring_control->device_idx[1]);
 334         idx = le32_to_cpu(ring_control->host_idx[1]);
 335         i = idx % ARRAY_SIZE(ring_control->tx_data);
 336
 337         mapping = pci_map_single(priv->pdev, skb->data, skb->len,
 338                                  PCI_DMA_TODEVICE);
 339         if (pci_dma_mapping_error(priv->pdev, mapping)) {
 340                 spin_unlock_irqrestore(&priv->lock, flags);
 341                 p54_free_skb(dev, skb);
 342                 dev_err(&priv->pdev->dev, "TX DMA mapping error\n");
 343                 return ;
 344         }
 345         priv->tx_buf_data[i] = skb;
 346
 347         desc = &ring_control->tx_data[i];
 348         desc->host_addr = cpu_to_le32(mapping);
 349         desc->device_addr = ((struct p54_hdr *)skb->data)->req_id;
 350         desc->len = cpu_to_le16(skb->len);
 351         desc->flags = 0;
 352
 353         wmb();
 354         ring_control->host_idx[1] = cpu_to_le32(idx + 1);
 355         spin_unlock_irqrestore(&priv->lock, flags);
 356
 357         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
 358         P54P_READ(dev_int);
 359 }
 360
 361 static void p54p_stop(struct ieee80211_hw *dev)
 362 {
 363         struct p54p_priv *priv = dev->priv;
 364         struct p54p_ring_control *ring_control = priv->ring_control;
 365         unsigned int i;
 366         struct p54p_desc *desc;
 367
 368         P54P_WRITE(int_enable, cpu_to_le32(0));
 369         P54P_READ(int_enable);
 370         udelay(10);
 371
 372         free_irq(priv->pdev->irq, dev);
 373
 374         tasklet_kill(&priv->tasklet);
 375
 376         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
 377
 378         for (i = 0; i < ARRAY_SIZE(priv->rx_buf_data); i++) {
 379                 desc = &ring_control->rx_data[i];
 380                 if (desc->host_addr)
 381                         pci_unmap_single(priv->pdev,
 382                                          le32_to_cpu(desc->host_addr),
 383                                          priv->common.rx_mtu + 32,
 384                                          PCI_DMA_FROMDEVICE);
 385                 kfree_skb(priv->rx_buf_data[i]);
 386                 priv->rx_buf_data[i] = NULL;
 387         }
 388
 389         for (i = 0; i < ARRAY_SIZE(priv->rx_buf_mgmt); i++) {
 390                 desc = &ring_control->rx_mgmt[i];
 391                 if (desc->host_addr)
 392                         pci_unmap_single(priv->pdev,
 393                                          le32_to_cpu(desc->host_addr),
 394                                          priv->common.rx_mtu + 32,
 395                                          PCI_DMA_FROMDEVICE);
 396                 kfree_skb(priv->rx_buf_mgmt[i]);
 397                 priv->rx_buf_mgmt[i] = NULL;
 398         }
 399
 400         for (i = 0; i < ARRAY_SIZE(priv->tx_buf_data); i++) {
 401                 desc = &ring_control->tx_data[i];
 402                 if (desc->host_addr)
 403                         pci_unmap_single(priv->pdev,
 404                                          le32_to_cpu(desc->host_addr),
 405                                          le16_to_cpu(desc->len),
 406                                          PCI_DMA_TODEVICE);
 407
 408                 p54_free_skb(dev, priv->tx_buf_data[i]);
 409                 priv->tx_buf_data[i] = NULL;
 410         }
 411
 412         for (i = 0; i < ARRAY_SIZE(priv->tx_buf_mgmt); i++) {
 413                 desc = &ring_control->tx_mgmt[i];
 414                 if (desc->host_addr)
 415                         pci_unmap_single(priv->pdev,
 416                                          le32_to_cpu(desc->host_addr),
 417                                          le16_to_cpu(desc->len),
 418                                          PCI_DMA_TODEVICE);
 419
 420                 p54_free_skb(dev, priv->tx_buf_mgmt[i]);
 421                 priv->tx_buf_mgmt[i] = NULL;
 422         }
 423
 424         memset(ring_control, 0, sizeof(*ring_control));
 425 }
 426
 427 static int p54p_open(struct ieee80211_hw *dev)
 428 {
 429         struct p54p_priv *priv = dev->priv;
 430         int err;
 431
 432         init_completion(&priv->boot_comp);
 433         err = request_irq(priv->pdev->irq, p54p_interrupt,
 434                           IRQF_SHARED, "p54pci", dev);
 435         if (err) {
 436                 dev_err(&priv->pdev->dev, "failed to register IRQ handler\n");
 437                 return err;
 438         }
 439
 440         memset(priv->ring_control, 0, sizeof(*priv->ring_control));
 441         err = p54p_upload_firmware(dev);
 442         if (err) {
 443                 free_irq(priv->pdev->irq, dev);
 444                 return err;
 445         }
 446         priv->rx_idx_data = priv->tx_idx_data = 0;
 447         priv->rx_idx_mgmt = priv->tx_idx_mgmt = 0;
 448
 449         p54p_refill_rx_ring(dev, 0, priv->ring_control->rx_data,
 450                 ARRAY_SIZE(priv->ring_control->rx_data), priv->rx_buf_data, 0);
 451
 452         p54p_refill_rx_ring(dev, 2, priv->ring_control->rx_mgmt,
 453                 ARRAY_SIZE(priv->ring_control->rx_mgmt), priv->rx_buf_mgmt, 0);
 454
 455         P54P_WRITE(ring_control_base, cpu_to_le32(priv->ring_control_dma));
 456         P54P_READ(ring_control_base);
 457         wmb();
 458         udelay(10);
 459
 460         P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT));
 461         P54P_READ(int_enable);
 462         wmb();
 463         udelay(10);
 464
 465         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
 466         P54P_READ(dev_int);
 467
 468         if (!wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ)) {
 469                 wiphy_err(dev->wiphy, "cannot boot firmware!\n");
 470                 p54p_stop(dev);
 471                 return -ETIMEDOUT;
 472         }
 473
 474         P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE));
 475         P54P_READ(int_enable);
 476         wmb();
 477         udelay(10);
 478
 479         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
 480         P54P_READ(dev_int);
 481         wmb();
 482         udelay(10);
 483
 484         return 0;
 485 }
 486
 487 static int __devinit p54p_probe(struct pci_dev *pdev,
 488                                 const struct pci_device_id *id)
 489 {
 490         struct p54p_priv *priv;
 491         struct ieee80211_hw *dev;
 492         unsigned long mem_addr, mem_len;
 493         int err;
 494
 495         err = pci_enable_device(pdev);
 496         if (err) {
 497                 dev_err(&pdev->dev, "Cannot enable new PCI device\n");
 498                 return err;
 499         }
 500
 501         mem_addr = pci_resource_start(pdev, 0);
 502         mem_len = pci_resource_len(pdev, 0);
 503         if (mem_len < sizeof(struct p54p_csr)) {
 504                 dev_err(&pdev->dev, "Too short PCI resources\n");
 505                 goto err_disable_dev;
 506         }
 507
 508         err = pci_request_regions(pdev, "p54pci");
 509         if (err) {
 510                 dev_err(&pdev->dev, "Cannot obtain PCI resources\n");
 511                 goto err_disable_dev;
 512         }
 513
 514         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) ||
 515             pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
 516                 dev_err(&pdev->dev, "No suitable DMA available\n");
 517                 goto err_free_reg;
 518         }
 519
 520         pci_set_master(pdev);
 521         pci_try_set_mwi(pdev);
 522
 523         pci_write_config_byte(pdev, 0x40, 0);
 524         pci_write_config_byte(pdev, 0x41, 0);
 525
 526         dev = p54_init_common(sizeof(*priv));
 527         if (!dev) {
 528                 dev_err(&pdev->dev, "ieee80211 alloc failed\n");
 529                 err = -ENOMEM;
 530                 goto err_free_reg;
 531         }
 532
 533         priv = dev->priv;
 534         priv->pdev = pdev;
 535
 536         SET_IEEE80211_DEV(dev, &pdev->dev);
 537         pci_set_drvdata(pdev, dev);
 538
 539         priv->map = ioremap(mem_addr, mem_len);
 540         if (!priv->map) {
 541                 dev_err(&pdev->dev, "Cannot map device memory\n");
 542                 err = -ENOMEM;
 543                 goto err_free_dev;
 544         }
 545
 546         priv->ring_control = pci_alloc_consistent(pdev, sizeof(*priv->ring_control),
 547                                                   &priv->ring_control_dma);
 548         if (!priv->ring_control) {
 549                 dev_err(&pdev->dev, "Cannot allocate rings\n");
 550                 err = -ENOMEM;
 551                 goto err_iounmap;
 552         }
 553         priv->common.open = p54p_open;
 554         priv->common.stop = p54p_stop;
 555         priv->common.tx = p54p_tx;
 556
 557         spin_lock_init(&priv->lock);
 558         tasklet_init(&priv->tasklet, p54p_tasklet, (unsigned long)dev);
 559
 560         err = request_firmware(&priv->firmware, "isl3886pci",
 561                                &priv->pdev->dev);
 562         if (err) {
 563                 dev_err(&pdev->dev, "Cannot find firmware (isl3886pci)\n");
 564                 err = request_firmware(&priv->firmware, "isl3886",
 565                                        &priv->pdev->dev);
 566                 if (err)
 567                         goto err_free_common;
 568         }
 569
 570         err = p54p_open(dev);
 571         if (err)
 572                 goto err_free_common;
 573         err = p54_read_eeprom(dev);
 574         p54p_stop(dev);
 575         if (err)
 576                 goto err_free_common;
 577
 578         err = p54_register_common(dev, &pdev->dev);
 579         if (err)
 580                 goto err_free_common;
 581
 582         return 0;
 583
 584  err_free_common:
 585         release_firmware(priv->firmware);
 586         pci_free_consistent(pdev, sizeof(*priv->ring_control),
 587                             priv->ring_control, priv->ring_control_dma);
 588
 589  err_iounmap:
 590         iounmap(priv->map);
 591
 592  err_free_dev:
 593         pci_set_drvdata(pdev, NULL);
 594         p54_free_common(dev);
 595
 596  err_free_reg:
 597         pci_release_regions(pdev);
 598  err_disable_dev:
 599         pci_disable_device(pdev);
 600         return err;
 601 }
 602
 603 static void __devexit p54p_remove(struct pci_dev *pdev)
 604 {
 605         struct ieee80211_hw *dev = pci_get_drvdata(pdev);
 606         struct p54p_priv *priv;
 607
 608         if (!dev)
 609                 return;
 610
 611         p54_unregister_common(dev);
 612         priv = dev->priv;
 613         release_firmware(priv->firmware);
 614         pci_free_consistent(pdev, sizeof(*priv->ring_control),
 615                             priv->ring_control, priv->ring_control_dma);
 616         iounmap(priv->map);
 617         pci_release_regions(pdev);
 618         pci_disable_device(pdev);
 619         p54_free_common(dev);
 620 }
 621
 622 #ifdef CONFIG_PM
 623 static int p54p_suspend(struct pci_dev *pdev, pm_message_t state)
 624 {
 625         struct ieee80211_hw *dev = pci_get_drvdata(pdev);
 626         struct p54p_priv *priv = dev->priv;
 627
 628         if (priv->common.mode != NL80211_IFTYPE_UNSPECIFIED) {
 629                 ieee80211_stop_queues(dev);
 630                 p54p_stop(dev);
 631         }
 632
 633         pci_save_state(pdev);
 634         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 635         return 0;
 636 }
 637
 638 static int p54p_resume(struct pci_dev *pdev)
 639 {
 640         struct ieee80211_hw *dev = pci_get_drvdata(pdev);
 641         struct p54p_priv *priv = dev->priv;
 642
 643         pci_set_power_state(pdev, PCI_D0);
 644         pci_restore_state(pdev);
 645
 646         if (priv->common.mode != NL80211_IFTYPE_UNSPECIFIED) {
 647                 p54p_open(dev);
 648                 ieee80211_wake_queues(dev);
 649         }
 650
 651         return 0;
 652 }
 653 #endif /* CONFIG_PM */
 654
 655 static struct pci_driver p54p_driver = {
 656         .name           = "p54pci",
 657         .id_table       = p54p_table,
 658         .probe          = p54p_probe,
 659         .remove         = __devexit_p(p54p_remove),
 660 #ifdef CONFIG_PM
 661         .suspend        = p54p_suspend,
 662         .resume         = p54p_resume,
 663 #endif /* CONFIG_PM */
 664 };
 665
 666 static int __init p54p_init(void)
 667 {
 668         return pci_register_driver(&p54p_driver);
 669 }
 670
 671 static void __exit p54p_exit(void)
 672 {
 673         pci_unregister_driver(&p54p_driver);
 674 }
 675
 676 module_init(p54p_init);
 677 module_exit(p54p_exit);