Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/net/wireless/hostap/hostap_pci.c

  1 #define PRISM2_PCI
  2 
  3 /* Host AP driver's support for Intersil Prism2.5 PCI cards is based on
  4  * driver patches from Reyk Floeter <reyk@vantronix.net> and
  5  * Andy Warner <andyw@pobox.com> */
  6 
  7 #include <linux/module.h>
  8 #include <linux/if.h>
  9 #include <linux/skbuff.h>
 10 #include <linux/netdevice.h>
 11 #include <linux/slab.h>
 12 #include <linux/workqueue.h>
 13 #include <linux/wireless.h>
 14 #include <net/iw_handler.h>
 15 
 16 #include <linux/ioport.h>
 17 #include <linux/pci.h>
 18 #include <asm/io.h>
 19 
 20 #include "hostap_wlan.h"
 21 
 22 
 23 static char *dev_info = "hostap_pci";
 24 
 25 
 26 MODULE_AUTHOR("Jouni Malinen");
 27 MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
 28                    "PCI cards.");
 29 MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
 30 MODULE_LICENSE("GPL");
 31 
 32 
 33 /* struct local_info::hw_priv */
 34 struct hostap_pci_priv {
 35         void __iomem *mem_start;
 36 };
 37 
 38 
 39 /* FIX: do we need mb/wmb/rmb with memory operations? */
 40 
 41 
 42 static DEFINE_PCI_DEVICE_TABLE(prism2_pci_id_table) = {
 43         /* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
 44         { 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
 45         /* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
 46         { 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
 47         /* Samsung MagicLAN SWL-2210P */
 48         { 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
 49         { 0 }
 50 };
 51 
 52 
 53 #ifdef PRISM2_IO_DEBUG
 54 
 55 static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
 56 {
 57         struct hostap_interface *iface;
 58         struct hostap_pci_priv *hw_priv;
 59         local_info_t *local;
 60         unsigned long flags;
 61 
 62         iface = netdev_priv(dev);
 63         local = iface->local;
 64         hw_priv = local->hw_priv;
 65 
 66         spin_lock_irqsave(&local->lock, flags);
 67         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
 68         writeb(v, hw_priv->mem_start + a);
 69         spin_unlock_irqrestore(&local->lock, flags);
 70 }
 71 
 72 static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
 73 {
 74         struct hostap_interface *iface;
 75         struct hostap_pci_priv *hw_priv;
 76         local_info_t *local;
 77         unsigned long flags;
 78         u8 v;
 79 
 80         iface = netdev_priv(dev);
 81         local = iface->local;
 82         hw_priv = local->hw_priv;
 83 
 84         spin_lock_irqsave(&local->lock, flags);
 85         v = readb(hw_priv->mem_start + a);
 86         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
 87         spin_unlock_irqrestore(&local->lock, flags);
 88         return v;
 89 }
 90 
 91 static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
 92 {
 93         struct hostap_interface *iface;
 94         struct hostap_pci_priv *hw_priv;
 95         local_info_t *local;
 96         unsigned long flags;
 97 
 98         iface = netdev_priv(dev);
 99         local = iface->local;
100         hw_priv = local->hw_priv;
101 
102         spin_lock_irqsave(&local->lock, flags);
103         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
104         writew(v, hw_priv->mem_start + a);
105         spin_unlock_irqrestore(&local->lock, flags);
106 }
107 
108 static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
109 {
110         struct hostap_interface *iface;
111         struct hostap_pci_priv *hw_priv;
112         local_info_t *local;
113         unsigned long flags;
114         u16 v;
115 
116         iface = netdev_priv(dev);
117         local = iface->local;
118         hw_priv = local->hw_priv;
119 
120         spin_lock_irqsave(&local->lock, flags);
121         v = readw(hw_priv->mem_start + a);
122         prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
123         spin_unlock_irqrestore(&local->lock, flags);
124         return v;
125 }
126 
127 #define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
128 #define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
129 #define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
130 #define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
131 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), le16_to_cpu((v)))
132 #define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw_debug(dev, (a)))
133 
134 #else /* PRISM2_IO_DEBUG */
135 
136 static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
137 {
138         struct hostap_interface *iface;
139         struct hostap_pci_priv *hw_priv;
140         iface = netdev_priv(dev);
141         hw_priv = iface->local->hw_priv;
142         writeb(v, hw_priv->mem_start + a);
143 }
144 
145 static inline u8 hfa384x_inb(struct net_device *dev, int a)
146 {
147         struct hostap_interface *iface;
148         struct hostap_pci_priv *hw_priv;
149         iface = netdev_priv(dev);
150         hw_priv = iface->local->hw_priv;
151         return readb(hw_priv->mem_start + a);
152 }
153 
154 static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
155 {
156         struct hostap_interface *iface;
157         struct hostap_pci_priv *hw_priv;
158         iface = netdev_priv(dev);
159         hw_priv = iface->local->hw_priv;
160         writew(v, hw_priv->mem_start + a);
161 }
162 
163 static inline u16 hfa384x_inw(struct net_device *dev, int a)
164 {
165         struct hostap_interface *iface;
166         struct hostap_pci_priv *hw_priv;
167         iface = netdev_priv(dev);
168         hw_priv = iface->local->hw_priv;
169         return readw(hw_priv->mem_start + a);
170 }
171 
172 #define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
173 #define HFA384X_INB(a) hfa384x_inb(dev, (a))
174 #define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
175 #define HFA384X_INW(a) hfa384x_inw(dev, (a))
176 #define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), le16_to_cpu((v)))
177 #define HFA384X_INW_DATA(a) cpu_to_le16(hfa384x_inw(dev, (a)))
178 
179 #endif /* PRISM2_IO_DEBUG */
180 
181 
182 static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
183                             int len)
184 {
185         u16 d_off;
186         __le16 *pos;
187 
188         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
189         pos = (__le16 *) buf;
190 
191         for ( ; len > 1; len -= 2)
192                 *pos++ = HFA384X_INW_DATA(d_off);
193 
194         if (len & 1)
195                 *((char *) pos) = HFA384X_INB(d_off);
196 
197         return 0;
198 }
199 
200 
201 static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
202 {
203         u16 d_off;
204         __le16 *pos;
205 
206         d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
207         pos = (__le16 *) buf;
208 
209         for ( ; len > 1; len -= 2)
210                 HFA384X_OUTW_DATA(*pos++, d_off);
211 
212         if (len & 1)
213                 HFA384X_OUTB(*((char *) pos), d_off);
214 
215         return 0;
216 }
217 
218 
219 /* FIX: This might change at some point.. */
220 #include "hostap_hw.c"
221 
222 static void prism2_pci_cor_sreset(local_info_t *local)
223 {
224         struct net_device *dev = local->dev;
225         u16 reg;
226 
227         reg = HFA384X_INB(HFA384X_PCICOR_OFF);
228         printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);
229 
230         /* linux-wlan-ng uses extremely long hold and settle times for
231          * COR sreset. A comment in the driver code mentions that the long
232          * delays appear to be necessary. However, at least IBM 22P6901 seems
233          * to work fine with shorter delays.
234          *
235          * Longer delays can be configured by uncommenting following line: */
236 /* #define PRISM2_PCI_USE_LONG_DELAYS */
237 
238 #ifdef PRISM2_PCI_USE_LONG_DELAYS
239         int i;
240 
241         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
242         mdelay(250);
243 
244         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
245         mdelay(500);
246 
247         /* Wait for f/w to complete initialization (CMD:BUSY == 0) */
248         i = 2000000 / 10;
249         while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
250                 udelay(10);
251 
252 #else /* PRISM2_PCI_USE_LONG_DELAYS */
253 
254         HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
255         mdelay(2);
256         HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
257         mdelay(2);
258 
259 #endif /* PRISM2_PCI_USE_LONG_DELAYS */
260 
261         if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
262                 printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
263         }
264 }
265 
266 
267 static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
268 {
269         struct net_device *dev = local->dev;
270 
271         HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
272         mdelay(10);
273         HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
274         mdelay(10);
275         HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
276         mdelay(10);
277 }
278 
279 
280 static struct prism2_helper_functions prism2_pci_funcs =
281 {
282         .card_present   = NULL,
283         .cor_sreset     = prism2_pci_cor_sreset,
284         .genesis_reset  = prism2_pci_genesis_reset,
285         .hw_type        = HOSTAP_HW_PCI,
286 };
287 
288 
289 static int prism2_pci_probe(struct pci_dev *pdev,
290                             const struct pci_device_id *id)
291 {
292         unsigned long phymem;
293         void __iomem *mem = NULL;
294         local_info_t *local = NULL;
295         struct net_device *dev = NULL;
296         static int cards_found /* = 0 */;
297         int irq_registered = 0;
298         struct hostap_interface *iface;
299         struct hostap_pci_priv *hw_priv;
300 
301         hw_priv = kzalloc(sizeof(*hw_priv), GFP_KERNEL);
302         if (hw_priv == NULL)
303                 return -ENOMEM;
304 
305         if (pci_enable_device(pdev))
306                 goto err_out_free;
307 
308         phymem = pci_resource_start(pdev, 0);
309 
310         if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
311                 printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
312                 goto err_out_disable;
313         }
314 
315         mem = pci_ioremap_bar(pdev, 0);
316         if (mem == NULL) {
317                 printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
318                 goto fail;
319         }
320 
321         dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
322                                      &pdev->dev);
323         if (dev == NULL)
324                 goto fail;
325         iface = netdev_priv(dev);
326         local = iface->local;
327         local->hw_priv = hw_priv;
328         cards_found++;
329 
330         dev->irq = pdev->irq;
331         hw_priv->mem_start = mem;
332         dev->base_addr = (unsigned long) mem;
333 
334         prism2_pci_cor_sreset(local);
335 
336         pci_set_drvdata(pdev, dev);
337 
338         if (request_irq(dev->irq, prism2_interrupt, IRQF_SHARED, dev->name,
339                         dev)) {
340                 printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
341                 goto fail;
342         } else
343                 irq_registered = 1;
344 
345         if (!local->pri_only && prism2_hw_config(dev, 1)) {
346                 printk(KERN_DEBUG "%s: hardware initialization failed\n",
347                        dev_info);
348                 goto fail;
349         }
350 
351         printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
352                "mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);
353 
354         return hostap_hw_ready(dev);
355 
356  fail:
357         if (irq_registered && dev)
358                 free_irq(dev->irq, dev);
359 
360         if (mem)
361                 iounmap(mem);
362 
363         release_mem_region(phymem, pci_resource_len(pdev, 0));
364 
365  err_out_disable:
366         pci_disable_device(pdev);
367         prism2_free_local_data(dev);
368 
369  err_out_free:
370         kfree(hw_priv);
371 
372         return -ENODEV;
373 }
374 
375 
376 static void prism2_pci_remove(struct pci_dev *pdev)
377 {
378         struct net_device *dev;
379         struct hostap_interface *iface;
380         void __iomem *mem_start;
381         struct hostap_pci_priv *hw_priv;
382 
383         dev = pci_get_drvdata(pdev);
384         iface = netdev_priv(dev);
385         hw_priv = iface->local->hw_priv;
386 
387         /* Reset the hardware, and ensure interrupts are disabled. */
388         prism2_pci_cor_sreset(iface->local);
389         hfa384x_disable_interrupts(dev);
390 
391         if (dev->irq)
392                 free_irq(dev->irq, dev);
393 
394         mem_start = hw_priv->mem_start;
395         prism2_free_local_data(dev);
396         kfree(hw_priv);
397 
398         iounmap(mem_start);
399 
400         release_mem_region(pci_resource_start(pdev, 0),
401                            pci_resource_len(pdev, 0));
402         pci_disable_device(pdev);
403 }
404 
405 
406 #ifdef CONFIG_PM
407 static int prism2_pci_suspend(struct pci_dev *pdev, pm_message_t state)
408 {
409         struct net_device *dev = pci_get_drvdata(pdev);
410 
411         if (netif_running(dev)) {
412                 netif_stop_queue(dev);
413                 netif_device_detach(dev);
414         }
415         prism2_suspend(dev);
416         pci_save_state(pdev);
417         pci_disable_device(pdev);
418         pci_set_power_state(pdev, PCI_D3hot);
419 
420         return 0;
421 }
422 
423 static int prism2_pci_resume(struct pci_dev *pdev)
424 {
425         struct net_device *dev = pci_get_drvdata(pdev);
426         int err;
427 
428         err = pci_enable_device(pdev);
429         if (err) {
430                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
431                        dev->name);
432                 return err;
433         }
434         pci_restore_state(pdev);
435         prism2_hw_config(dev, 0);
436         if (netif_running(dev)) {
437                 netif_device_attach(dev);
438                 netif_start_queue(dev);
439         }
440 
441         return 0;
442 }
443 #endif /* CONFIG_PM */
444 
445 
446 MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);
447 
448 static struct pci_driver prism2_pci_driver = {
449         .name           = "hostap_pci",
450         .id_table       = prism2_pci_id_table,
451         .probe          = prism2_pci_probe,
452         .remove         = prism2_pci_remove,
453 #ifdef CONFIG_PM
454         .suspend        = prism2_pci_suspend,
455         .resume         = prism2_pci_resume,
456 #endif /* CONFIG_PM */
457 };
458 
459 module_pci_driver(prism2_pci_driver);
460 

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