wl12xx: one SDIO initialization is enough
[linux-2.6.git] / drivers / net / wireless / wl12xx / sdio.c
1 /*
2  * This file is part of wl1271
3  *
4  * Copyright (C) 2009-2010 Nokia Corporation
5  *
6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/irq.h>
25 #include <linux/module.h>
26 #include <linux/vmalloc.h>
27 #include <linux/mmc/sdio_func.h>
28 #include <linux/mmc/sdio_ids.h>
29 #include <linux/mmc/card.h>
30 #include <linux/mmc/host.h>
31 #include <linux/gpio.h>
32 #include <linux/wl12xx.h>
33 #include <linux/pm_runtime.h>
34
35 #include "wl12xx.h"
36 #include "wl12xx_80211.h"
37 #include "io.h"
38
39 #ifndef SDIO_VENDOR_ID_TI
40 #define SDIO_VENDOR_ID_TI               0x0097
41 #endif
42
43 #ifndef SDIO_DEVICE_ID_TI_WL1271
44 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
45 #endif
46
47 static const struct sdio_device_id wl1271_devices[] __devinitconst = {
48         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
49         {}
50 };
51 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
52
53 static void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
54 {
55         sdio_claim_host(wl->if_priv);
56         sdio_set_block_size(wl->if_priv, blksz);
57         sdio_release_host(wl->if_priv);
58 }
59
60 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
61 {
62         return wl->if_priv;
63 }
64
65 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
66 {
67         return &(wl_to_func(wl)->dev);
68 }
69
70 static irqreturn_t wl1271_hardirq(int irq, void *cookie)
71 {
72         struct wl1271 *wl = cookie;
73         unsigned long flags;
74
75         wl1271_debug(DEBUG_IRQ, "IRQ");
76
77         /* complete the ELP completion */
78         spin_lock_irqsave(&wl->wl_lock, flags);
79         set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
80         if (wl->elp_compl) {
81                 complete(wl->elp_compl);
82                 wl->elp_compl = NULL;
83         }
84
85         if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
86                 /* don't enqueue a work right now. mark it as pending */
87                 set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
88                 wl1271_debug(DEBUG_IRQ, "should not enqueue work");
89                 disable_irq_nosync(wl->irq);
90                 pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
91                 spin_unlock_irqrestore(&wl->wl_lock, flags);
92                 return IRQ_HANDLED;
93         }
94         spin_unlock_irqrestore(&wl->wl_lock, flags);
95
96         return IRQ_WAKE_THREAD;
97 }
98
99 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
100 {
101         disable_irq(wl->irq);
102 }
103
104 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
105 {
106         enable_irq(wl->irq);
107 }
108
109 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
110                                  size_t len, bool fixed)
111 {
112         int ret;
113         struct sdio_func *func = wl_to_func(wl);
114
115         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
116                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
117                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
118                              addr, ((u8 *)buf)[0]);
119         } else {
120                 if (fixed)
121                         ret = sdio_readsb(func, buf, addr, len);
122                 else
123                         ret = sdio_memcpy_fromio(func, buf, addr, len);
124
125                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
126                              addr, len);
127                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
128         }
129
130         if (ret)
131                 wl1271_error("sdio read failed (%d)", ret);
132 }
133
134 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
135                                   size_t len, bool fixed)
136 {
137         int ret;
138         struct sdio_func *func = wl_to_func(wl);
139
140         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
141                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
142                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
143                              addr, ((u8 *)buf)[0]);
144         } else {
145                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
146                              addr, len);
147                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
148
149                 if (fixed)
150                         ret = sdio_writesb(func, addr, buf, len);
151                 else
152                         ret = sdio_memcpy_toio(func, addr, buf, len);
153         }
154
155         if (ret)
156                 wl1271_error("sdio write failed (%d)", ret);
157 }
158
159 static int wl1271_sdio_power_on(struct wl1271 *wl)
160 {
161         struct sdio_func *func = wl_to_func(wl);
162         int ret;
163
164         /* If enabled, tell runtime PM not to power off the card */
165         if (pm_runtime_enabled(&func->dev)) {
166                 ret = pm_runtime_get_sync(&func->dev);
167                 if (ret)
168                         goto out;
169         } else {
170                 /* Runtime PM is disabled: power up the card manually */
171                 ret = mmc_power_restore_host(func->card->host);
172                 if (ret < 0)
173                         goto out;
174         }
175
176         sdio_claim_host(func);
177         sdio_enable_func(func);
178
179 out:
180         return ret;
181 }
182
183 static int wl1271_sdio_power_off(struct wl1271 *wl)
184 {
185         struct sdio_func *func = wl_to_func(wl);
186         int ret;
187
188         sdio_disable_func(func);
189         sdio_release_host(func);
190
191         /* Power off the card manually, even if runtime PM is enabled. */
192         ret = mmc_power_save_host(func->card->host);
193         if (ret < 0)
194                 return ret;
195
196         /* If enabled, let runtime PM know the card is powered off */
197         if (pm_runtime_enabled(&func->dev))
198                 ret = pm_runtime_put_sync(&func->dev);
199
200         return ret;
201 }
202
203 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
204 {
205         if (enable)
206                 return wl1271_sdio_power_on(wl);
207         else
208                 return wl1271_sdio_power_off(wl);
209 }
210
211 static struct wl1271_if_operations sdio_ops = {
212         .read           = wl1271_sdio_raw_read,
213         .write          = wl1271_sdio_raw_write,
214         .power          = wl1271_sdio_set_power,
215         .dev            = wl1271_sdio_wl_to_dev,
216         .enable_irq     = wl1271_sdio_enable_interrupts,
217         .disable_irq    = wl1271_sdio_disable_interrupts,
218         .set_block_size = wl1271_sdio_set_block_size,
219 };
220
221 static int __devinit wl1271_probe(struct sdio_func *func,
222                                   const struct sdio_device_id *id)
223 {
224         struct ieee80211_hw *hw;
225         const struct wl12xx_platform_data *wlan_data;
226         struct wl1271 *wl;
227         unsigned long irqflags;
228         mmc_pm_flag_t mmcflags;
229         int ret;
230
231         /* We are only able to handle the wlan function */
232         if (func->num != 0x02)
233                 return -ENODEV;
234
235         hw = wl1271_alloc_hw();
236         if (IS_ERR(hw))
237                 return PTR_ERR(hw);
238
239         wl = hw->priv;
240
241         wl->if_priv = func;
242         wl->if_ops = &sdio_ops;
243
244         /* Grab access to FN0 for ELP reg. */
245         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
246
247         /* Use block mode for transferring over one block size of data */
248         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
249
250         wlan_data = wl12xx_get_platform_data();
251         if (IS_ERR(wlan_data)) {
252                 ret = PTR_ERR(wlan_data);
253                 wl1271_error("missing wlan platform data: %d", ret);
254                 goto out_free;
255         }
256
257         wl->irq = wlan_data->irq;
258         wl->ref_clock = wlan_data->board_ref_clock;
259         wl->tcxo_clock = wlan_data->board_tcxo_clock;
260         wl->platform_quirks = wlan_data->platform_quirks;
261
262         if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
263                 irqflags = IRQF_TRIGGER_RISING;
264         else
265                 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
266
267         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
268                                    irqflags,
269                                    DRIVER_NAME, wl);
270         if (ret < 0) {
271                 wl1271_error("request_irq() failed: %d", ret);
272                 goto out_free;
273         }
274
275         ret = enable_irq_wake(wl->irq);
276         if (!ret) {
277                 wl->irq_wake_enabled = true;
278                 device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
279
280                 /* if sdio can keep power while host is suspended, enable wow */
281                 mmcflags = sdio_get_host_pm_caps(func);
282                 wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
283
284                 if (mmcflags & MMC_PM_KEEP_POWER)
285                         hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
286         }
287         disable_irq(wl->irq);
288
289         ret = wl1271_init_ieee80211(wl);
290         if (ret)
291                 goto out_irq;
292
293         ret = wl1271_register_hw(wl);
294         if (ret)
295                 goto out_irq;
296
297         sdio_set_drvdata(func, wl);
298
299         /* Tell PM core that we don't need the card to be powered now */
300         pm_runtime_put_noidle(&func->dev);
301
302         return 0;
303
304  out_irq:
305         free_irq(wl->irq, wl);
306
307  out_free:
308         wl1271_free_hw(wl);
309
310         return ret;
311 }
312
313 static void __devexit wl1271_remove(struct sdio_func *func)
314 {
315         struct wl1271 *wl = sdio_get_drvdata(func);
316
317         /* Undo decrement done above in wl1271_probe */
318         pm_runtime_get_noresume(&func->dev);
319
320         wl1271_unregister_hw(wl);
321         if (wl->irq_wake_enabled) {
322                 device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
323                 disable_irq_wake(wl->irq);
324         }
325         free_irq(wl->irq, wl);
326         wl1271_free_hw(wl);
327 }
328
329 #ifdef CONFIG_PM
330 static int wl1271_suspend(struct device *dev)
331 {
332         /* Tell MMC/SDIO core it's OK to power down the card
333          * (if it isn't already), but not to remove it completely */
334         struct sdio_func *func = dev_to_sdio_func(dev);
335         struct wl1271 *wl = sdio_get_drvdata(func);
336         mmc_pm_flag_t sdio_flags;
337         int ret = 0;
338
339         wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
340                      wl->wow_enabled);
341
342         /* check whether sdio should keep power */
343         if (wl->wow_enabled) {
344                 sdio_flags = sdio_get_host_pm_caps(func);
345
346                 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
347                         wl1271_error("can't keep power while host "
348                                      "is suspended");
349                         ret = -EINVAL;
350                         goto out;
351                 }
352
353                 /* keep power while host suspended */
354                 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
355                 if (ret) {
356                         wl1271_error("error while trying to keep power");
357                         goto out;
358                 }
359
360                 /* release host */
361                 sdio_release_host(func);
362         }
363 out:
364         return ret;
365 }
366
367 static int wl1271_resume(struct device *dev)
368 {
369         struct sdio_func *func = dev_to_sdio_func(dev);
370         struct wl1271 *wl = sdio_get_drvdata(func);
371
372         wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
373         if (wl->wow_enabled) {
374                 /* claim back host */
375                 sdio_claim_host(func);
376         }
377
378         return 0;
379 }
380
381 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
382         .suspend        = wl1271_suspend,
383         .resume         = wl1271_resume,
384 };
385 #endif
386
387 static struct sdio_driver wl1271_sdio_driver = {
388         .name           = "wl1271_sdio",
389         .id_table       = wl1271_devices,
390         .probe          = wl1271_probe,
391         .remove         = __devexit_p(wl1271_remove),
392 #ifdef CONFIG_PM
393         .drv = {
394                 .pm = &wl1271_sdio_pm_ops,
395         },
396 #endif
397 };
398
399 static int __init wl1271_init(void)
400 {
401         return sdio_register_driver(&wl1271_sdio_driver);
402 }
403
404 static void __exit wl1271_exit(void)
405 {
406         sdio_unregister_driver(&wl1271_sdio_driver);
407 }
408
409 module_init(wl1271_init);
410 module_exit(wl1271_exit);
411
412 MODULE_LICENSE("GPL");
413 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
414 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
415 MODULE_FIRMWARE(WL1271_FW_NAME);
416 MODULE_FIRMWARE(WL128X_FW_NAME);
417 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
418 MODULE_FIRMWARE(WL128X_AP_FW_NAME);