net: wl12xx: remove the nops
[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/crc7.h>
27 #include <linux/vmalloc.h>
28 #include <linux/mmc/sdio_func.h>
29 #include <linux/mmc/sdio_ids.h>
30 #include <linux/mmc/card.h>
31 #include <linux/mmc/host.h>
32 #include <linux/gpio.h>
33 #include <linux/wl12xx.h>
34 #include <linux/pm_runtime.h>
35
36 #include "wl12xx.h"
37 #include "wl12xx_80211.h"
38 #include "io.h"
39
40 #ifndef SDIO_VENDOR_ID_TI
41 #define SDIO_VENDOR_ID_TI               0x0097
42 #endif
43
44 #ifndef SDIO_DEVICE_ID_TI_WL1271
45 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
46 #endif
47
48 static const struct sdio_device_id wl1271_devices[] __devinitconst = {
49         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
50         {}
51 };
52 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
53
54 static void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
55 {
56         sdio_claim_host(wl->if_priv);
57         sdio_set_block_size(wl->if_priv, blksz);
58         sdio_release_host(wl->if_priv);
59 }
60
61 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
62 {
63         return wl->if_priv;
64 }
65
66 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
67 {
68         return &(wl_to_func(wl)->dev);
69 }
70
71 static irqreturn_t wl1271_hardirq(int irq, void *cookie)
72 {
73         struct wl1271 *wl = cookie;
74         unsigned long flags;
75
76         wl1271_debug(DEBUG_IRQ, "IRQ");
77
78         /* complete the ELP completion */
79         spin_lock_irqsave(&wl->wl_lock, flags);
80         set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
81         if (wl->elp_compl) {
82                 complete(wl->elp_compl);
83                 wl->elp_compl = NULL;
84         }
85
86         if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
87                 /* don't enqueue a work right now. mark it as pending */
88                 set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
89                 wl1271_debug(DEBUG_IRQ, "should not enqueue work");
90                 disable_irq_nosync(wl->irq);
91                 pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
92                 spin_unlock_irqrestore(&wl->wl_lock, flags);
93                 return IRQ_HANDLED;
94         }
95         spin_unlock_irqrestore(&wl->wl_lock, flags);
96
97         return IRQ_WAKE_THREAD;
98 }
99
100 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
101 {
102         disable_irq(wl->irq);
103 }
104
105 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
106 {
107         enable_irq(wl->irq);
108 }
109
110 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
111                                  size_t len, bool fixed)
112 {
113         int ret;
114         struct sdio_func *func = wl_to_func(wl);
115
116         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
117                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
118                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
119                              addr, ((u8 *)buf)[0]);
120         } else {
121                 if (fixed)
122                         ret = sdio_readsb(func, buf, addr, len);
123                 else
124                         ret = sdio_memcpy_fromio(func, buf, addr, len);
125
126                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
127                              addr, len);
128                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
129         }
130
131         if (ret)
132                 wl1271_error("sdio read failed (%d)", ret);
133 }
134
135 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
136                                   size_t len, bool fixed)
137 {
138         int ret;
139         struct sdio_func *func = wl_to_func(wl);
140
141         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
142                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
143                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
144                              addr, ((u8 *)buf)[0]);
145         } else {
146                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
147                              addr, len);
148                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
149
150                 if (fixed)
151                         ret = sdio_writesb(func, addr, buf, len);
152                 else
153                         ret = sdio_memcpy_toio(func, addr, buf, len);
154         }
155
156         if (ret)
157                 wl1271_error("sdio write failed (%d)", ret);
158 }
159
160 static int wl1271_sdio_power_on(struct wl1271 *wl)
161 {
162         struct sdio_func *func = wl_to_func(wl);
163         int ret;
164
165         /* Make sure the card will not be powered off by runtime PM */
166         ret = pm_runtime_get_sync(&func->dev);
167         if (ret < 0)
168                 goto out;
169
170         /* Runtime PM might be disabled, so power up the card manually */
171         ret = mmc_power_restore_host(func->card->host);
172         if (ret < 0)
173                 goto out;
174
175         sdio_claim_host(func);
176         sdio_enable_func(func);
177
178 out:
179         return ret;
180 }
181
182 static int wl1271_sdio_power_off(struct wl1271 *wl)
183 {
184         struct sdio_func *func = wl_to_func(wl);
185         int ret;
186
187         sdio_disable_func(func);
188         sdio_release_host(func);
189
190         /* Runtime PM might be disabled, so power off the card manually */
191         ret = mmc_power_save_host(func->card->host);
192         if (ret < 0)
193                 return ret;
194
195         /* Let runtime PM know the card is powered off */
196         return pm_runtime_put_sync(&func->dev);
197 }
198
199 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
200 {
201         if (enable)
202                 return wl1271_sdio_power_on(wl);
203         else
204                 return wl1271_sdio_power_off(wl);
205 }
206
207 static struct wl1271_if_operations sdio_ops = {
208         .read           = wl1271_sdio_raw_read,
209         .write          = wl1271_sdio_raw_write,
210         .power          = wl1271_sdio_set_power,
211         .dev            = wl1271_sdio_wl_to_dev,
212         .enable_irq     = wl1271_sdio_enable_interrupts,
213         .disable_irq    = wl1271_sdio_disable_interrupts,
214         .set_block_size = wl1271_sdio_set_block_size,
215 };
216
217 static int __devinit wl1271_probe(struct sdio_func *func,
218                                   const struct sdio_device_id *id)
219 {
220         struct ieee80211_hw *hw;
221         const struct wl12xx_platform_data *wlan_data;
222         struct wl1271 *wl;
223         unsigned long irqflags;
224         mmc_pm_flag_t mmcflags;
225         int ret;
226
227         /* We are only able to handle the wlan function */
228         if (func->num != 0x02)
229                 return -ENODEV;
230
231         hw = wl1271_alloc_hw();
232         if (IS_ERR(hw))
233                 return PTR_ERR(hw);
234
235         wl = hw->priv;
236
237         wl->if_priv = func;
238         wl->if_ops = &sdio_ops;
239
240         /* Grab access to FN0 for ELP reg. */
241         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
242
243         /* Use block mode for transferring over one block size of data */
244         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
245
246         wlan_data = wl12xx_get_platform_data();
247         if (IS_ERR(wlan_data)) {
248                 ret = PTR_ERR(wlan_data);
249                 wl1271_error("missing wlan platform data: %d", ret);
250                 goto out_free;
251         }
252
253         wl->irq = wlan_data->irq;
254         wl->ref_clock = wlan_data->board_ref_clock;
255         wl->tcxo_clock = wlan_data->board_tcxo_clock;
256         wl->platform_quirks = wlan_data->platform_quirks;
257
258         if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
259                 irqflags = IRQF_TRIGGER_RISING;
260         else
261                 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
262
263         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
264                                    irqflags,
265                                    DRIVER_NAME, wl);
266         if (ret < 0) {
267                 wl1271_error("request_irq() failed: %d", ret);
268                 goto out_free;
269         }
270
271         enable_irq_wake(wl->irq);
272         device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
273
274         disable_irq(wl->irq);
275
276         /* if sdio can keep power while host is suspended, enable wow */
277         mmcflags = sdio_get_host_pm_caps(func);
278         wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
279
280         if (mmcflags & MMC_PM_KEEP_POWER)
281                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
282
283         ret = wl1271_init_ieee80211(wl);
284         if (ret)
285                 goto out_irq;
286
287         ret = wl1271_register_hw(wl);
288         if (ret)
289                 goto out_irq;
290
291         sdio_set_drvdata(func, wl);
292
293         /* Tell PM core that we don't need the card to be powered now */
294         pm_runtime_put_noidle(&func->dev);
295
296         return 0;
297
298  out_irq:
299         free_irq(wl->irq, wl);
300
301  out_free:
302         wl1271_free_hw(wl);
303
304         return ret;
305 }
306
307 static void __devexit wl1271_remove(struct sdio_func *func)
308 {
309         struct wl1271 *wl = sdio_get_drvdata(func);
310
311         /* Undo decrement done above in wl1271_probe */
312         pm_runtime_get_noresume(&func->dev);
313
314         wl1271_unregister_hw(wl);
315         device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
316         disable_irq_wake(wl->irq);
317         free_irq(wl->irq, wl);
318         wl1271_free_hw(wl);
319 }
320
321 #ifdef CONFIG_PM
322 static int wl1271_suspend(struct device *dev)
323 {
324         /* Tell MMC/SDIO core it's OK to power down the card
325          * (if it isn't already), but not to remove it completely */
326         struct sdio_func *func = dev_to_sdio_func(dev);
327         struct wl1271 *wl = sdio_get_drvdata(func);
328         mmc_pm_flag_t sdio_flags;
329         int ret = 0;
330
331         wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
332                      wl->wow_enabled);
333
334         /* check whether sdio should keep power */
335         if (wl->wow_enabled) {
336                 sdio_flags = sdio_get_host_pm_caps(func);
337
338                 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
339                         wl1271_error("can't keep power while host "
340                                      "is suspended");
341                         ret = -EINVAL;
342                         goto out;
343                 }
344
345                 /* keep power while host suspended */
346                 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
347                 if (ret) {
348                         wl1271_error("error while trying to keep power");
349                         goto out;
350                 }
351
352                 /* release host */
353                 sdio_release_host(func);
354         }
355 out:
356         return ret;
357 }
358
359 static int wl1271_resume(struct device *dev)
360 {
361         struct sdio_func *func = dev_to_sdio_func(dev);
362         struct wl1271 *wl = sdio_get_drvdata(func);
363
364         wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
365         if (wl->wow_enabled) {
366                 /* claim back host */
367                 sdio_claim_host(func);
368         }
369
370         return 0;
371 }
372
373 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
374         .suspend        = wl1271_suspend,
375         .resume         = wl1271_resume,
376 };
377 #endif
378
379 static struct sdio_driver wl1271_sdio_driver = {
380         .name           = "wl1271_sdio",
381         .id_table       = wl1271_devices,
382         .probe          = wl1271_probe,
383         .remove         = __devexit_p(wl1271_remove),
384 #ifdef CONFIG_PM
385         .drv = {
386                 .pm = &wl1271_sdio_pm_ops,
387         },
388 #endif
389 };
390
391 static int __init wl1271_init(void)
392 {
393         return sdio_register_driver(&wl1271_sdio_driver);
394 }
395
396 static void __exit wl1271_exit(void)
397 {
398         sdio_unregister_driver(&wl1271_sdio_driver);
399 }
400
401 module_init(wl1271_init);
402 module_exit(wl1271_exit);
403
404 MODULE_LICENSE("GPL");
405 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
406 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
407 MODULE_FIRMWARE(WL1271_FW_NAME);
408 MODULE_FIRMWARE(WL128X_FW_NAME);
409 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
410 MODULE_FIRMWARE(WL128X_AP_FW_NAME);