diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/net/wireless/wl12xx/sdio.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/net/wireless/wl12xx/sdio.c')
-rw-r--r-- | drivers/net/wireless/wl12xx/sdio.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/sdio.c b/drivers/net/wireless/wl12xx/sdio.c new file mode 100644 index 00000000000..fb1fd5af75e --- /dev/null +++ b/drivers/net/wireless/wl12xx/sdio.c | |||
@@ -0,0 +1,418 @@ | |||
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 < 0) | ||
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); | ||