wl12xx: Handle platforms without level trigger interrupts
[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[] = {
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         spin_unlock_irqrestore(&wl->wl_lock, flags);
86
87         return IRQ_WAKE_THREAD;
88 }
89
90 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
91 {
92         disable_irq(wl->irq);
93 }
94
95 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
96 {
97         enable_irq(wl->irq);
98 }
99
100 static void wl1271_sdio_reset(struct wl1271 *wl)
101 {
102 }
103
104 static void wl1271_sdio_init(struct wl1271 *wl)
105 {
106 }
107
108 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
109                                  size_t len, bool fixed)
110 {
111         int ret;
112         struct sdio_func *func = wl_to_func(wl);
113
114         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
115                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
116                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
117                              addr, ((u8 *)buf)[0]);
118         } else {
119                 if (fixed)
120                         ret = sdio_readsb(func, buf, addr, len);
121                 else
122                         ret = sdio_memcpy_fromio(func, buf, addr, len);
123
124                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
125                              addr, len);
126                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
127         }
128
129         if (ret)
130                 wl1271_error("sdio read failed (%d)", ret);
131 }
132
133 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
134                                   size_t len, bool fixed)
135 {
136         int ret;
137         struct sdio_func *func = wl_to_func(wl);
138
139         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
140                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
141                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
142                              addr, ((u8 *)buf)[0]);
143         } else {
144                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
145                              addr, len);
146                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
147
148                 if (fixed)
149                         ret = sdio_writesb(func, addr, buf, len);
150                 else
151                         ret = sdio_memcpy_toio(func, addr, buf, len);
152         }
153
154         if (ret)
155                 wl1271_error("sdio write failed (%d)", ret);
156 }
157
158 static int wl1271_sdio_power_on(struct wl1271 *wl)
159 {
160         struct sdio_func *func = wl_to_func(wl);
161         int ret;
162
163         /* Make sure the card will not be powered off by runtime PM */
164         ret = pm_runtime_get_sync(&func->dev);
165         if (ret < 0)
166                 goto out;
167
168         /* Runtime PM might be disabled, so power up the card manually */
169         ret = mmc_power_restore_host(func->card->host);
170         if (ret < 0)
171                 goto out;
172
173         sdio_claim_host(func);
174         sdio_enable_func(func);
175
176 out:
177         return ret;
178 }
179
180 static int wl1271_sdio_power_off(struct wl1271 *wl)
181 {
182         struct sdio_func *func = wl_to_func(wl);
183         int ret;
184
185         sdio_disable_func(func);
186         sdio_release_host(func);
187
188         /* Runtime PM might be disabled, so power off the card manually */
189         ret = mmc_power_save_host(func->card->host);
190         if (ret < 0)
191                 return ret;
192
193         /* Let runtime PM know the card is powered off */
194         return pm_runtime_put_sync(&func->dev);
195 }
196
197 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
198 {
199         if (enable)
200                 return wl1271_sdio_power_on(wl);
201         else
202                 return wl1271_sdio_power_off(wl);
203 }
204
205 static struct wl1271_if_operations sdio_ops = {
206         .read           = wl1271_sdio_raw_read,
207         .write          = wl1271_sdio_raw_write,
208         .reset          = wl1271_sdio_reset,
209         .init           = wl1271_sdio_init,
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         int ret;
225
226         /* We are only able to handle the wlan function */
227         if (func->num != 0x02)
228                 return -ENODEV;
229
230         hw = wl1271_alloc_hw();
231         if (IS_ERR(hw))
232                 return PTR_ERR(hw);
233
234         wl = hw->priv;
235
236         wl->if_priv = func;
237         wl->if_ops = &sdio_ops;
238
239         /* Grab access to FN0 for ELP reg. */
240         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
241
242         /* Use block mode for transferring over one block size of data */
243         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
244
245         wlan_data = wl12xx_get_platform_data();
246         if (IS_ERR(wlan_data)) {
247                 ret = PTR_ERR(wlan_data);
248                 wl1271_error("missing wlan platform data: %d", ret);
249                 goto out_free;
250         }
251
252         wl->irq = wlan_data->irq;
253         wl->ref_clock = wlan_data->board_ref_clock;
254         wl->tcxo_clock = wlan_data->board_tcxo_clock;
255         wl->platform_quirks = wlan_data->platform_quirks;
256
257         if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
258                 irqflags = IRQF_TRIGGER_RISING;
259         else
260                 irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
261
262         ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
263                                    irqflags,
264                                    DRIVER_NAME, wl);
265         if (ret < 0) {
266                 wl1271_error("request_irq() failed: %d", ret);
267                 goto out_free;
268         }
269
270         disable_irq(wl->irq);
271
272         ret = wl1271_init_ieee80211(wl);
273         if (ret)
274                 goto out_irq;
275
276         ret = wl1271_register_hw(wl);
277         if (ret)
278                 goto out_irq;
279
280         sdio_set_drvdata(func, wl);
281
282         /* Tell PM core that we don't need the card to be powered now */
283         pm_runtime_put_noidle(&func->dev);
284
285         wl1271_notice("initialized");
286
287         return 0;
288
289  out_irq:
290         free_irq(wl->irq, wl);
291
292  out_free:
293         wl1271_free_hw(wl);
294
295         return ret;
296 }
297
298 static void __devexit wl1271_remove(struct sdio_func *func)
299 {
300         struct wl1271 *wl = sdio_get_drvdata(func);
301
302         /* Undo decrement done above in wl1271_probe */
303         pm_runtime_get_noresume(&func->dev);
304
305         wl1271_unregister_hw(wl);
306         free_irq(wl->irq, wl);
307         wl1271_free_hw(wl);
308 }
309
310 static int wl1271_suspend(struct device *dev)
311 {
312         /* Tell MMC/SDIO core it's OK to power down the card
313          * (if it isn't already), but not to remove it completely */
314         return 0;
315 }
316
317 static int wl1271_resume(struct device *dev)
318 {
319         return 0;
320 }
321
322 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
323         .suspend        = wl1271_suspend,
324         .resume         = wl1271_resume,
325 };
326
327 static struct sdio_driver wl1271_sdio_driver = {
328         .name           = "wl1271_sdio",
329         .id_table       = wl1271_devices,
330         .probe          = wl1271_probe,
331         .remove         = __devexit_p(wl1271_remove),
332         .drv = {
333                 .pm = &wl1271_sdio_pm_ops,
334         },
335 };
336
337 static int __init wl1271_init(void)
338 {
339         int ret;
340
341         ret = sdio_register_driver(&wl1271_sdio_driver);
342         if (ret < 0) {
343                 wl1271_error("failed to register sdio driver: %d", ret);
344                 goto out;
345         }
346
347 out:
348         return ret;
349 }
350
351 static void __exit wl1271_exit(void)
352 {
353         sdio_unregister_driver(&wl1271_sdio_driver);
354
355         wl1271_notice("unloaded");
356 }
357
358 module_init(wl1271_init);
359 module_exit(wl1271_exit);
360
361 MODULE_LICENSE("GPL");
362 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
363 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
364 MODULE_FIRMWARE(WL1271_FW_NAME);
365 MODULE_FIRMWARE(WL128X_FW_NAME);
366 MODULE_FIRMWARE(WL127X_AP_FW_NAME);
367 MODULE_FIRMWARE(WL128X_AP_FW_NAME);