Commit | Line | Data |
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3ec410d7 BC |
1 | /* |
2 | * wl12xx SDIO routines | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
16 | * 02110-1301 USA | |
17 | * | |
18 | * Copyright (C) 2005 Texas Instruments Incorporated | |
19 | * Copyright (C) 2008 Google Inc | |
20 | * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com) | |
21 | */ | |
22 | #include <linux/module.h> | |
3ec410d7 | 23 | #include <linux/mod_devicetable.h> |
3ec410d7 BC |
24 | #include <linux/mmc/sdio_func.h> |
25 | #include <linux/mmc/sdio_ids.h> | |
8c00b39f | 26 | #include <linux/platform_device.h> |
c1f9a095 | 27 | #include <linux/wl12xx.h> |
a02a2956 | 28 | #include <linux/irq.h> |
1d4b89f2 | 29 | #include <linux/pm_runtime.h> |
3ec410d7 BC |
30 | |
31 | #include "wl1251.h" | |
3ec410d7 BC |
32 | |
33 | #ifndef SDIO_VENDOR_ID_TI | |
34 | #define SDIO_VENDOR_ID_TI 0x104c | |
35 | #endif | |
36 | ||
37 | #ifndef SDIO_DEVICE_ID_TI_WL1251 | |
38 | #define SDIO_DEVICE_ID_TI_WL1251 0x9066 | |
39 | #endif | |
40 | ||
832c10fd GI |
41 | struct wl1251_sdio { |
42 | struct sdio_func *func; | |
43 | u32 elp_val; | |
44 | }; | |
45 | ||
3ec410d7 BC |
46 | static struct sdio_func *wl_to_func(struct wl1251 *wl) |
47 | { | |
832c10fd GI |
48 | struct wl1251_sdio *wl_sdio = wl->if_priv; |
49 | return wl_sdio->func; | |
3ec410d7 BC |
50 | } |
51 | ||
52 | static void wl1251_sdio_interrupt(struct sdio_func *func) | |
53 | { | |
b5ed9c1b BC |
54 | struct wl1251 *wl = sdio_get_drvdata(func); |
55 | ||
56 | wl1251_debug(DEBUG_IRQ, "IRQ"); | |
57 | ||
58 | /* FIXME should be synchronous for sdio */ | |
16e711f9 | 59 | ieee80211_queue_work(wl->hw, &wl->irq_work); |
3ec410d7 BC |
60 | } |
61 | ||
62 | static const struct sdio_device_id wl1251_devices[] = { | |
63 | { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) }, | |
64 | {} | |
65 | }; | |
66 | MODULE_DEVICE_TABLE(sdio, wl1251_devices); | |
67 | ||
68 | ||
3c9cb9c3 GI |
69 | static void wl1251_sdio_read(struct wl1251 *wl, int addr, |
70 | void *buf, size_t len) | |
3ec410d7 BC |
71 | { |
72 | int ret; | |
73 | struct sdio_func *func = wl_to_func(wl); | |
74 | ||
75 | sdio_claim_host(func); | |
76 | ret = sdio_memcpy_fromio(func, buf, addr, len); | |
77 | if (ret) | |
78 | wl1251_error("sdio read failed (%d)", ret); | |
79 | sdio_release_host(func); | |
80 | } | |
81 | ||
3c9cb9c3 GI |
82 | static void wl1251_sdio_write(struct wl1251 *wl, int addr, |
83 | void *buf, size_t len) | |
3ec410d7 BC |
84 | { |
85 | int ret; | |
86 | struct sdio_func *func = wl_to_func(wl); | |
87 | ||
88 | sdio_claim_host(func); | |
89 | ret = sdio_memcpy_toio(func, addr, buf, len); | |
90 | if (ret) | |
91 | wl1251_error("sdio write failed (%d)", ret); | |
92 | sdio_release_host(func); | |
93 | } | |
94 | ||
3f9e750d GI |
95 | static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val) |
96 | { | |
97 | int ret = 0; | |
832c10fd GI |
98 | struct wl1251_sdio *wl_sdio = wl->if_priv; |
99 | struct sdio_func *func = wl_sdio->func; | |
100 | ||
101 | /* | |
102 | * The hardware only supports RAW (read after write) access for | |
103 | * reading, regular sdio_readb won't work here (it interprets | |
104 | * the unused bits of CMD52 as write data even if we send read | |
105 | * request). | |
106 | */ | |
3f9e750d | 107 | sdio_claim_host(func); |
832c10fd | 108 | *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret); |
3f9e750d GI |
109 | sdio_release_host(func); |
110 | ||
111 | if (ret) | |
112 | wl1251_error("sdio_readb failed (%d)", ret); | |
113 | } | |
114 | ||
115 | static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val) | |
116 | { | |
117 | int ret = 0; | |
832c10fd GI |
118 | struct wl1251_sdio *wl_sdio = wl->if_priv; |
119 | struct sdio_func *func = wl_sdio->func; | |
3f9e750d GI |
120 | |
121 | sdio_claim_host(func); | |
122 | sdio_writeb(func, val, addr, &ret); | |
123 | sdio_release_host(func); | |
124 | ||
125 | if (ret) | |
126 | wl1251_error("sdio_writeb failed (%d)", ret); | |
832c10fd GI |
127 | else |
128 | wl_sdio->elp_val = val; | |
3f9e750d GI |
129 | } |
130 | ||
3c9cb9c3 | 131 | static void wl1251_sdio_reset(struct wl1251 *wl) |
3ec410d7 BC |
132 | { |
133 | } | |
134 | ||
b5ed9c1b BC |
135 | static void wl1251_sdio_enable_irq(struct wl1251 *wl) |
136 | { | |
137 | struct sdio_func *func = wl_to_func(wl); | |
138 | ||
139 | sdio_claim_host(func); | |
140 | sdio_claim_irq(func, wl1251_sdio_interrupt); | |
141 | sdio_release_host(func); | |
142 | } | |
143 | ||
144 | static void wl1251_sdio_disable_irq(struct wl1251 *wl) | |
145 | { | |
146 | struct sdio_func *func = wl_to_func(wl); | |
147 | ||
148 | sdio_claim_host(func); | |
149 | sdio_release_irq(func); | |
150 | sdio_release_host(func); | |
151 | } | |
152 | ||
a02a2956 GI |
153 | /* Interrupts when using dedicated WLAN_IRQ pin */ |
154 | static irqreturn_t wl1251_line_irq(int irq, void *cookie) | |
155 | { | |
156 | struct wl1251 *wl = cookie; | |
157 | ||
158 | ieee80211_queue_work(wl->hw, &wl->irq_work); | |
159 | ||
160 | return IRQ_HANDLED; | |
161 | } | |
162 | ||
163 | static void wl1251_enable_line_irq(struct wl1251 *wl) | |
164 | { | |
165 | return enable_irq(wl->irq); | |
166 | } | |
167 | ||
168 | static void wl1251_disable_line_irq(struct wl1251 *wl) | |
169 | { | |
170 | return disable_irq(wl->irq); | |
171 | } | |
172 | ||
cb7bbc7a | 173 | static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable) |
3ec410d7 | 174 | { |
1d4b89f2 GI |
175 | struct sdio_func *func = wl_to_func(wl); |
176 | int ret; | |
cb7bbc7a | 177 | |
1d4b89f2 GI |
178 | if (enable) { |
179 | /* | |
180 | * Power is controlled by runtime PM, but we still call board | |
181 | * callback in case it wants to do any additional setup, | |
182 | * for example enabling clock buffer for the module. | |
183 | */ | |
184 | if (wl->set_power) | |
185 | wl->set_power(true); | |
186 | ||
187 | ret = pm_runtime_get_sync(&func->dev); | |
188 | if (ret < 0) | |
189 | goto out; | |
190 | ||
191 | sdio_claim_host(func); | |
192 | sdio_enable_func(func); | |
193 | sdio_release_host(func); | |
194 | } else { | |
195 | sdio_claim_host(func); | |
196 | sdio_disable_func(func); | |
197 | sdio_release_host(func); | |
198 | ||
199 | ret = pm_runtime_put_sync(&func->dev); | |
200 | if (ret < 0) | |
201 | goto out; | |
202 | ||
203 | if (wl->set_power) | |
204 | wl->set_power(false); | |
205 | } | |
206 | ||
207 | out: | |
208 | return ret; | |
3ec410d7 BC |
209 | } |
210 | ||
a02a2956 | 211 | static struct wl1251_if_operations wl1251_sdio_ops = { |
3ec410d7 BC |
212 | .read = wl1251_sdio_read, |
213 | .write = wl1251_sdio_write, | |
3f9e750d GI |
214 | .write_elp = wl1251_sdio_write_elp, |
215 | .read_elp = wl1251_sdio_read_elp, | |
3ec410d7 | 216 | .reset = wl1251_sdio_reset, |
cb7bbc7a | 217 | .power = wl1251_sdio_set_power, |
3ec410d7 BC |
218 | }; |
219 | ||
3c9cb9c3 GI |
220 | static int wl1251_sdio_probe(struct sdio_func *func, |
221 | const struct sdio_device_id *id) | |
3ec410d7 BC |
222 | { |
223 | int ret; | |
224 | struct wl1251 *wl; | |
225 | struct ieee80211_hw *hw; | |
832c10fd | 226 | struct wl1251_sdio *wl_sdio; |
e4b3fdb8 | 227 | const struct wl12xx_platform_data *wl12xx_board_data; |
3ec410d7 BC |
228 | |
229 | hw = wl1251_alloc_hw(); | |
230 | if (IS_ERR(hw)) | |
231 | return PTR_ERR(hw); | |
232 | ||
233 | wl = hw->priv; | |
234 | ||
832c10fd GI |
235 | wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL); |
236 | if (wl_sdio == NULL) { | |
237 | ret = -ENOMEM; | |
238 | goto out_free_hw; | |
239 | } | |
240 | ||
3ec410d7 BC |
241 | sdio_claim_host(func); |
242 | ret = sdio_enable_func(func); | |
243 | if (ret) | |
244 | goto release; | |
245 | ||
246 | sdio_set_block_size(func, 512); | |
a02a2956 | 247 | sdio_release_host(func); |
3ec410d7 BC |
248 | |
249 | SET_IEEE80211_DEV(hw, &func->dev); | |
832c10fd GI |
250 | wl_sdio->func = func; |
251 | wl->if_priv = wl_sdio; | |
3ec410d7 | 252 | wl->if_ops = &wl1251_sdio_ops; |
3ec410d7 | 253 | |
e4b3fdb8 | 254 | wl12xx_board_data = wl12xx_get_platform_data(); |
ae29fbb1 | 255 | if (!IS_ERR(wl12xx_board_data)) { |
8c00b39f | 256 | wl->set_power = wl12xx_board_data->set_power; |
a02a2956 | 257 | wl->irq = wl12xx_board_data->irq; |
8c00b39f GI |
258 | wl->use_eeprom = wl12xx_board_data->use_eeprom; |
259 | } | |
260 | ||
a02a2956 GI |
261 | if (wl->irq) { |
262 | ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl); | |
263 | if (ret < 0) { | |
264 | wl1251_error("request_irq() failed: %d", ret); | |
265 | goto disable; | |
266 | } | |
267 | ||
dced35ae | 268 | irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); |
a02a2956 GI |
269 | disable_irq(wl->irq); |
270 | ||
271 | wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq; | |
272 | wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq; | |
273 | ||
274 | wl1251_info("using dedicated interrupt line"); | |
275 | } else { | |
276 | wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq; | |
277 | wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq; | |
278 | ||
279 | wl1251_info("using SDIO interrupt"); | |
280 | } | |
281 | ||
3ec410d7 | 282 | ret = wl1251_init_ieee80211(wl); |
3ec410d7 | 283 | if (ret) |
a02a2956 | 284 | goto out_free_irq; |
3ec410d7 | 285 | |
3ec410d7 | 286 | sdio_set_drvdata(func, wl); |
1d4b89f2 GI |
287 | |
288 | /* Tell PM core that we don't need the card to be powered now */ | |
289 | pm_runtime_put_noidle(&func->dev); | |
290 | ||
3ec410d7 BC |
291 | return ret; |
292 | ||
a02a2956 GI |
293 | out_free_irq: |
294 | if (wl->irq) | |
295 | free_irq(wl->irq, wl); | |
3ec410d7 | 296 | disable: |
b5ed9c1b | 297 | sdio_claim_host(func); |
3ec410d7 BC |
298 | sdio_disable_func(func); |
299 | release: | |
300 | sdio_release_host(func); | |
832c10fd GI |
301 | kfree(wl_sdio); |
302 | out_free_hw: | |
aa679c36 | 303 | wl1251_free_hw(wl); |
3ec410d7 BC |
304 | return ret; |
305 | } | |
306 | ||
307 | static void __devexit wl1251_sdio_remove(struct sdio_func *func) | |
308 | { | |
309 | struct wl1251 *wl = sdio_get_drvdata(func); | |
832c10fd | 310 | struct wl1251_sdio *wl_sdio = wl->if_priv; |
3ec410d7 | 311 | |
1d4b89f2 GI |
312 | /* Undo decrement done above in wl1251_probe */ |
313 | pm_runtime_get_noresume(&func->dev); | |
314 | ||
a02a2956 GI |
315 | if (wl->irq) |
316 | free_irq(wl->irq, wl); | |
832c10fd | 317 | kfree(wl_sdio); |
3ec410d7 BC |
318 | wl1251_free_hw(wl); |
319 | ||
320 | sdio_claim_host(func); | |
321 | sdio_release_irq(func); | |
322 | sdio_disable_func(func); | |
323 | sdio_release_host(func); | |
324 | } | |
325 | ||
1d4b89f2 GI |
326 | static int wl1251_suspend(struct device *dev) |
327 | { | |
328 | /* | |
329 | * Tell MMC/SDIO core it's OK to power down the card | |
330 | * (if it isn't already), but not to remove it completely. | |
331 | */ | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static int wl1251_resume(struct device *dev) | |
336 | { | |
337 | return 0; | |
338 | } | |
339 | ||
340 | static const struct dev_pm_ops wl1251_sdio_pm_ops = { | |
341 | .suspend = wl1251_suspend, | |
342 | .resume = wl1251_resume, | |
343 | }; | |
344 | ||
3ec410d7 BC |
345 | static struct sdio_driver wl1251_sdio_driver = { |
346 | .name = "wl1251_sdio", | |
347 | .id_table = wl1251_devices, | |
348 | .probe = wl1251_sdio_probe, | |
349 | .remove = __devexit_p(wl1251_sdio_remove), | |
1d4b89f2 | 350 | .drv.pm = &wl1251_sdio_pm_ops, |
3ec410d7 BC |
351 | }; |
352 | ||
353 | static int __init wl1251_sdio_init(void) | |
354 | { | |
355 | int err; | |
356 | ||
357 | err = sdio_register_driver(&wl1251_sdio_driver); | |
358 | if (err) | |
359 | wl1251_error("failed to register sdio driver: %d", err); | |
360 | return err; | |
361 | } | |
362 | ||
363 | static void __exit wl1251_sdio_exit(void) | |
364 | { | |
365 | sdio_unregister_driver(&wl1251_sdio_driver); | |
366 | wl1251_notice("unloaded"); | |
367 | } | |
368 | ||
369 | module_init(wl1251_sdio_init); | |
370 | module_exit(wl1251_sdio_exit); | |
371 | ||
372 | MODULE_LICENSE("GPL"); | |
31c726f0 | 373 | MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>"); |