Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/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/pci.h>
 17 #include <linux/slab.h>
 18 #include <linux/firmware.h>
 19 #include <linux/etherdevice.h>
 20 #include <linux/delay.h>
 21 #include <linux/completion.h>
 22 #include <linux/module.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 const struct pci_device_id 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                 dma_addr_t dma_addr;
203                 desc = &ring[i];
204                 len = le16_to_cpu(desc->len);
205                 skb = rx_buf[i];
206 
207                 if (!skb) {
208                         i++;
209                         i %= ring_limit;
210                         continue;
211                 }
212 
213                 if (unlikely(len > priv->common.rx_mtu)) {
214                         if (net_ratelimit())
215                                 dev_err(&priv->pdev->dev, "rx'd frame size "
216                                         "exceeds length threshold.\n");
217 
218                         len = priv->common.rx_mtu;
219                 }
220                 dma_addr = le32_to_cpu(desc->host_addr);
221                 pci_dma_sync_single_for_cpu(priv->pdev, dma_addr,
222                         priv->common.rx_mtu + 32, PCI_DMA_FROMDEVICE);
223                 skb_put(skb, len);
224 
225                 if (p54_rx(dev, skb)) {
226                         pci_unmap_single(priv->pdev, dma_addr,
227                                 priv->common.rx_mtu + 32, PCI_DMA_FROMDEVICE);
228                         rx_buf[i] = NULL;
229                         desc->host_addr = cpu_to_le32(0);
230                 } else {
231                         skb_trim(skb, 0);
232                         pci_dma_sync_single_for_device(priv->pdev, dma_addr,
233                                 priv->common.rx_mtu + 32, PCI_DMA_FROMDEVICE);
234                         desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
235                 }
236 
237                 i++;
238                 i %= ring_limit;
239         }
240 
241         p54p_refill_rx_ring(dev, ring_index, ring, ring_limit, rx_buf, *index);
242 }
243 
244 static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
245         int ring_index, struct p54p_desc *ring, u32 ring_limit,
246         struct sk_buff **tx_buf)
247 {
248         struct p54p_priv *priv = dev->priv;
249         struct p54p_ring_control *ring_control = priv->ring_control;
250         struct p54p_desc *desc;
251         struct sk_buff *skb;
252         u32 idx, i;
253 
254         i = (*index) % ring_limit;
255         (*index) = idx = le32_to_cpu(ring_control->device_idx[ring_index]);
256         idx %= ring_limit;
257 
258         while (i != idx) {
259                 desc = &ring[i];
260 
261                 skb = tx_buf[i];
262                 tx_buf[i] = NULL;
263 
264                 pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr),
265                                  le16_to_cpu(desc->len), PCI_DMA_TODEVICE);
266 
267                 desc->host_addr = 0;
268                 desc->device_addr = 0;
269                 desc->len = 0;
270                 desc->flags = 0;
271 
272                 if (skb && FREE_AFTER_TX(skb))
273                         p54_free_skb(dev, skb);
274 
275                 i++;
276                 i %= ring_limit;
277         }
278 }
279 
280 static void p54p_tasklet(unsigned long dev_id)
281 {
282         struct ieee80211_hw *dev = (struct ieee80211_hw *)dev_id;
283         struct p54p_priv *priv = dev->priv;
284         struct p54p_ring_control *ring_control = priv->ring_control;
285 
286         p54p_check_tx_ring(dev, &priv->tx_idx_mgmt, 3, ring_control->tx_mgmt,
287                            ARRAY_SIZE(ring_control->tx_mgmt),
288                            priv->tx_buf_mgmt);
289 
290         p54p_check_tx_ring(dev, &priv->tx_idx_data, 1, ring_control->tx_data,
291                            ARRAY_SIZE(ring_control->tx_data),
292                            priv->tx_buf_data);
293 
294         p54p_check_rx_ring(dev, &priv->rx_idx_mgmt, 2, ring_control->rx_mgmt,
295                 ARRAY_SIZE(ring_control->rx_mgmt), priv->rx_buf_mgmt);
296 
297         p54p_check_rx_ring(dev, &priv->rx_idx_data, 0, ring_control->rx_data,
298                 ARRAY_SIZE(ring_control->rx_data), priv->rx_buf_data);
299 
300         wmb();
301         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
302 }
303 
304 static irqreturn_t p54p_interrupt(int irq, void *dev_id)
305 {
306         struct ieee80211_hw *dev = dev_id;
307         struct p54p_priv *priv = dev->priv;
308         __le32 reg;
309 
310         reg = P54P_READ(int_ident);
311         if (unlikely(reg == cpu_to_le32(0xFFFFFFFF))) {
312                 goto out;
313         }
314         P54P_WRITE(int_ack, reg);
315 
316         reg &= P54P_READ(int_enable);
317 
318         if (reg & cpu_to_le32(ISL38XX_INT_IDENT_UPDATE))
319                 tasklet_schedule(&priv->tasklet);
320         else if (reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT))
321                 complete(&priv->boot_comp);
322 
323 out:
324         return reg ? IRQ_HANDLED : IRQ_NONE;
325 }
326 
327 static void p54p_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
328 {
329         unsigned long flags;
330         struct p54p_priv *priv = dev->priv;
331         struct p54p_ring_control *ring_control = priv->ring_control;
332         struct p54p_desc *desc;
333         dma_addr_t mapping;
334         u32 idx, i;
335 
336         spin_lock_irqsave(&priv->lock, flags);
337         idx = le32_to_cpu(ring_control->host_idx[1]);
338         i = idx % ARRAY_SIZE(ring_control->tx_data);
339 
340         mapping = pci_map_single(priv->pdev, skb->data, skb->len,
341                                  PCI_DMA_TODEVICE);
342         if (pci_dma_mapping_error(priv->pdev, mapping)) {
343                 spin_unlock_irqrestore(&priv->lock, flags);
344                 p54_free_skb(dev, skb);
345                 dev_err(&priv->pdev->dev, "TX DMA mapping error\n");
346                 return ;
347         }
348         priv->tx_buf_data[i] = skb;
349 
350         desc = &ring_control->tx_data[i];
351         desc->host_addr = cpu_to_le32(mapping);
352         desc->device_addr = ((struct p54_hdr *)skb->data)->req_id;
353         desc->len = cpu_to_le16(skb->len);
354         desc->flags = 0;
355 
356         wmb();
357         ring_control->host_idx[1] = cpu_to_le32(idx + 1);
358         spin_unlock_irqrestore(&priv->lock, flags);
359 
360         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
361         P54P_READ(dev_int);
362 }
363 
364 static void p54p_stop(struct ieee80211_hw *dev)
365 {
366         struct p54p_priv *priv = dev->priv;
367         struct p54p_ring_control *ring_control = priv->ring_control;
368         unsigned int i;
369         struct p54p_desc *desc;
370 
371         P54P_WRITE(int_enable, cpu_to_le32(0));
372         P54P_READ(int_enable);
373         udelay(10);
374 
375         free_irq(priv->pdev->irq, dev);
376 
377         tasklet_kill(&priv->tasklet);
378 
379         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
380 
381         for (i = 0; i < ARRAY_SIZE(priv->rx_buf_data); i++) {
382                 desc = &ring_control->rx_data[i];
383                 if (desc->host_addr)
384                         pci_unmap_single(priv->pdev,
385                                          le32_to_cpu(desc->host_addr),
386                                          priv->common.rx_mtu + 32,
387                                          PCI_DMA_FROMDEVICE);
388                 kfree_skb(priv->rx_buf_data[i]);
389                 priv->rx_buf_data[i] = NULL;
390         }
391 
392         for (i = 0; i < ARRAY_SIZE(priv->rx_buf_mgmt); i++) {
393                 desc = &ring_control->rx_mgmt[i];
394                 if (desc->host_addr)
395                         pci_unmap_single(priv->pdev,
396                                          le32_to_cpu(desc->host_addr),
397                                          priv->common.rx_mtu + 32,
398                                          PCI_DMA_FROMDEVICE);
399                 kfree_skb(priv->rx_buf_mgmt[i]);
400                 priv->rx_buf_mgmt[i] = NULL;
401         }
402 
403         for (i = 0; i < ARRAY_SIZE(priv->tx_buf_data); i++) {
404                 desc = &ring_control->tx_data[i];
405                 if (desc->host_addr)
406                         pci_unmap_single(priv->pdev,
407                                          le32_to_cpu(desc->host_addr),
408                                          le16_to_cpu(desc->len),
409                                          PCI_DMA_TODEVICE);
410 
411                 p54_free_skb(dev, priv->tx_buf_data[i]);
412                 priv->tx_buf_data[i] = NULL;
413         }
414 
415         for (i = 0; i < ARRAY_SIZE(priv->tx_buf_mgmt); i++) {
416                 desc = &ring_control->tx_mgmt[i];
417                 if (desc->host_addr)
418                         pci_unmap_single(priv->pdev,
419                                          le32_to_cpu(desc->host_addr),
420                                          le16_to_cpu(desc->len),
421                                          PCI_DMA_TODEVICE);
422 
423                 p54_free_skb(dev, priv->tx_buf_mgmt[i]);
424                 priv->tx_buf_mgmt[i] = NULL;
425         }
426 
427         memset(ring_control, 0, sizeof(*ring_control));
428 }
429 
430 static int p54p_open(struct ieee80211_hw *dev)
431 {
432         struct p54p_priv *priv = dev->priv;
433         int err;
434         long timeout;
435 
436         init_completion(&priv->boot_comp);
437         err = request_irq(priv->pdev->irq, p54p_interrupt,
438                           IRQF_SHARED, "p54pci", dev);
439         if (err) {
440                 dev_err(&priv->pdev->dev, "failed to register IRQ handler\n");
441                 return err;
442         }
443 
444         memset(priv->ring_control, 0, sizeof(*priv->ring_control));
445         err = p54p_upload_firmware(dev);
446         if (err) {
447                 free_irq(priv->pdev->irq, dev);
448                 return err;
449         }
450         priv->rx_idx_data = priv->tx_idx_data = 0;
451         priv->rx_idx_mgmt = priv->tx_idx_mgmt = 0;
452 
453         p54p_refill_rx_ring(dev, 0, priv->ring_control->rx_data,
454                 ARRAY_SIZE(priv->ring_control->rx_data), priv->rx_buf_data, 0);
455 
456         p54p_refill_rx_ring(dev, 2, priv->ring_control->rx_mgmt,
457                 ARRAY_SIZE(priv->ring_control->rx_mgmt), priv->rx_buf_mgmt, 0);
458 
459         P54P_WRITE(ring_control_base, cpu_to_le32(priv->ring_control_dma));
460         P54P_READ(ring_control_base);
461         wmb();
462         udelay(10);
463 
464         P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT));
465         P54P_READ(int_enable);
466         wmb();
467         udelay(10);
468 
469         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
470         P54P_READ(dev_int);
471 
472         timeout = wait_for_completion_interruptible_timeout(
473                         &priv->boot_comp, HZ);
474         if (timeout <= 0) {
475                 wiphy_err(dev->wiphy, "Cannot boot firmware!\n");
476                 p54p_stop(dev);
477                 return timeout ? -ERESTARTSYS : -ETIMEDOUT;
478         }
479 
480         P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE));
481         P54P_READ(int_enable);
482         wmb();
483         udelay(10);
484 
485         P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
486         P54P_READ(dev_int);
487         wmb();
488         udelay(10);
489 
490         return 0;
491 }
492 
493 static void p54p_firmware_step2(const struct firmware *fw,
494                                 void *context)
495 {
496         struct p54p_priv *priv = context;
497         struct ieee80211_hw *dev = priv->common.hw;
498         struct pci_dev *pdev = priv->pdev;
499         int err;
500 
501         if (!fw) {
502                 dev_err(&pdev->dev, "Cannot find firmware (isl3886pci)\n");
503                 err = -ENOENT;
504                 goto out;
505         }
506 
507         priv->firmware = fw;
508 
509         err = p54p_open(dev);
510         if (err)
511                 goto out;
512         err = p54_read_eeprom(dev);
513         p54p_stop(dev);
514         if (err)
515                 goto out;
516 
517         err = p54_register_common(dev, &pdev->dev);
518         if (err)
519                 goto out;
520 
521 out:
522 
523         complete(&priv->fw_loaded);
524 
525         if (err) {
526                 struct device *parent = pdev->dev.parent;
527 
528                 if (parent)
529                         device_lock(parent);
530 
531                 /*
532                  * This will indirectly result in a call to p54p_remove.
533                  * Hence, we don't need to bother with freeing any
534                  * allocated ressources at all.
535                  */
536                 device_release_driver(&pdev->dev);
537 
538                 if (parent)
539                         device_unlock(parent);
540         }
541 
542         pci_dev_put(pdev);
543 }
544 
545 static int p54p_probe(struct pci_dev *pdev,
546                                 const struct pci_device_id *id)
547 {
548         struct p54p_priv *priv;
549         struct ieee80211_hw *dev;
550         unsigned long mem_addr, mem_len;
551         int err;
552 
553         pci_dev_get(pdev);
554         err = pci_enable_device(pdev);
555         if (err) {
556                 dev_err(&pdev->dev, "Cannot enable new PCI device\n");
557                 return err;
558         }
559 
560         mem_addr = pci_resource_start(pdev, 0);
561         mem_len = pci_resource_len(pdev, 0);
562         if (mem_len < sizeof(struct p54p_csr)) {
563                 dev_err(&pdev->dev, "Too short PCI resources\n");
564                 err = -ENODEV;
565                 goto err_disable_dev;
566         }
567 
568         err = pci_request_regions(pdev, "p54pci");
569         if (err) {
570                 dev_err(&pdev->dev, "Cannot obtain PCI resources\n");
571                 goto err_disable_dev;
572         }
573 
574         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
575         if (!err)
576                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
577         if (err) {
578                 dev_err(&pdev->dev, "No suitable DMA available\n");
579                 goto err_free_reg;
580         }
581 
582         pci_set_master(pdev);
583         pci_try_set_mwi(pdev);
584 
585         pci_write_config_byte(pdev, 0x40, 0);
586         pci_write_config_byte(pdev, 0x41, 0);
587 
588         dev = p54_init_common(sizeof(*priv));
589         if (!dev) {
590                 dev_err(&pdev->dev, "ieee80211 alloc failed\n");
591                 err = -ENOMEM;
592                 goto err_free_reg;
593         }
594 
595         priv = dev->priv;
596         priv->pdev = pdev;
597 
598         init_completion(&priv->fw_loaded);
599         SET_IEEE80211_DEV(dev, &pdev->dev);
600         pci_set_drvdata(pdev, dev);
601 
602         priv->map = ioremap(mem_addr, mem_len);
603         if (!priv->map) {
604                 dev_err(&pdev->dev, "Cannot map device memory\n");
605                 err = -ENOMEM;
606                 goto err_free_dev;
607         }
608 
609         priv->ring_control = pci_alloc_consistent(pdev, sizeof(*priv->ring_control),
610                                                   &priv->ring_control_dma);
611         if (!priv->ring_control) {
612                 dev_err(&pdev->dev, "Cannot allocate rings\n");
613                 err = -ENOMEM;
614                 goto err_iounmap;
615         }
616         priv->common.open = p54p_open;
617         priv->common.stop = p54p_stop;
618         priv->common.tx = p54p_tx;
619 
620         spin_lock_init(&priv->lock);
621         tasklet_init(&priv->tasklet, p54p_tasklet, (unsigned long)dev);
622 
623         err = request_firmware_nowait(THIS_MODULE, 1, "isl3886pci",
624                                       &priv->pdev->dev, GFP_KERNEL,
625                                       priv, p54p_firmware_step2);
626         if (!err)
627                 return 0;
628 
629         pci_free_consistent(pdev, sizeof(*priv->ring_control),
630                             priv->ring_control, priv->ring_control_dma);
631 
632  err_iounmap:
633         iounmap(priv->map);
634 
635  err_free_dev:
636         p54_free_common(dev);
637 
638  err_free_reg:
639         pci_release_regions(pdev);
640  err_disable_dev:
641         pci_disable_device(pdev);
642         pci_dev_put(pdev);
643         return err;
644 }
645 
646 static void p54p_remove(struct pci_dev *pdev)
647 {
648         struct ieee80211_hw *dev = pci_get_drvdata(pdev);
649         struct p54p_priv *priv;
650 
651         if (!dev)
652                 return;
653 
654         priv = dev->priv;
655         wait_for_completion(&priv->fw_loaded);
656         p54_unregister_common(dev);
657         release_firmware(priv->firmware);
658         pci_free_consistent(pdev, sizeof(*priv->ring_control),
659                             priv->ring_control, priv->ring_control_dma);
660         iounmap(priv->map);
661         pci_release_regions(pdev);
662         pci_disable_device(pdev);
663         p54_free_common(dev);
664 }
665 
666 #ifdef CONFIG_PM_SLEEP
667 static int p54p_suspend(struct device *device)
668 {
669         struct pci_dev *pdev = to_pci_dev(device);
670 
671         pci_save_state(pdev);
672         pci_set_power_state(pdev, PCI_D3hot);
673         pci_disable_device(pdev);
674         return 0;
675 }
676 
677 static int p54p_resume(struct device *device)
678 {
679         struct pci_dev *pdev = to_pci_dev(device);
680         int err;
681 
682         err = pci_reenable_device(pdev);
683         if (err)
684                 return err;
685         return pci_set_power_state(pdev, PCI_D0);
686 }
687 
688 static SIMPLE_DEV_PM_OPS(p54pci_pm_ops, p54p_suspend, p54p_resume);
689 
690 #define P54P_PM_OPS (&p54pci_pm_ops)
691 #else
692 #define P54P_PM_OPS (NULL)
693 #endif /* CONFIG_PM_SLEEP */
694 
695 static struct pci_driver p54p_driver = {
696         .name           = "p54pci",
697         .id_table       = p54p_table,
698         .probe          = p54p_probe,
699         .remove         = p54p_remove,
700         .driver.pm      = P54P_PM_OPS,
701 };
702 
703 module_pci_driver(p54p_driver);
704 

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