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.
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.
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
18 * Copyright (C) 2005 Texas Instruments Incorporated
19 * Copyright (C) 2008 Google Inc
20 * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
22 #include <linux/module.h>
23 #include <linux/mod_devicetable.h>
24 #include <linux/mmc/sdio_func.h>
25 #include <linux/mmc/sdio_ids.h>
26 #include <linux/platform_device.h>
27 #include <linux/wl12xx.h>
28 #include <linux/irq.h>
29 #include <linux/pm_runtime.h>
33 #ifndef SDIO_VENDOR_ID_TI
34 #define SDIO_VENDOR_ID_TI 0x104c
37 #ifndef SDIO_DEVICE_ID_TI_WL1251
38 #define SDIO_DEVICE_ID_TI_WL1251 0x9066
42 struct sdio_func *func;
46 static struct sdio_func *wl_to_func(struct wl1251 *wl)
48 struct wl1251_sdio *wl_sdio = wl->if_priv;
52 static void wl1251_sdio_interrupt(struct sdio_func *func)
54 struct wl1251 *wl = sdio_get_drvdata(func);
56 wl1251_debug(DEBUG_IRQ, "IRQ");
58 /* FIXME should be synchronous for sdio */
59 ieee80211_queue_work(wl->hw, &wl->irq_work);
62 static const struct sdio_device_id wl1251_devices[] = {
63 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
66 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
69 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
70 void *buf, size_t len)
73 struct sdio_func *func = wl_to_func(wl);
75 sdio_claim_host(func);
76 ret = sdio_memcpy_fromio(func, buf, addr, len);
78 wl1251_error("sdio read failed (%d)", ret);
79 sdio_release_host(func);
82 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
83 void *buf, size_t len)
86 struct sdio_func *func = wl_to_func(wl);
88 sdio_claim_host(func);
89 ret = sdio_memcpy_toio(func, addr, buf, len);
91 wl1251_error("sdio write failed (%d)", ret);
92 sdio_release_host(func);
95 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
98 struct wl1251_sdio *wl_sdio = wl->if_priv;
99 struct sdio_func *func = wl_sdio->func;
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
107 sdio_claim_host(func);
108 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
109 sdio_release_host(func);
112 wl1251_error("sdio_readb failed (%d)", ret);
115 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
118 struct wl1251_sdio *wl_sdio = wl->if_priv;
119 struct sdio_func *func = wl_sdio->func;
121 sdio_claim_host(func);
122 sdio_writeb(func, val, addr, &ret);
123 sdio_release_host(func);
126 wl1251_error("sdio_writeb failed (%d)", ret);
128 wl_sdio->elp_val = val;
131 static void wl1251_sdio_reset(struct wl1251 *wl)
135 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
137 struct sdio_func *func = wl_to_func(wl);
139 sdio_claim_host(func);
140 sdio_claim_irq(func, wl1251_sdio_interrupt);
141 sdio_release_host(func);
144 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
146 struct sdio_func *func = wl_to_func(wl);
148 sdio_claim_host(func);
149 sdio_release_irq(func);
150 sdio_release_host(func);
153 /* Interrupts when using dedicated WLAN_IRQ pin */
154 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
156 struct wl1251 *wl = cookie;
158 ieee80211_queue_work(wl->hw, &wl->irq_work);
163 static void wl1251_enable_line_irq(struct wl1251 *wl)
165 return enable_irq(wl->irq);
168 static void wl1251_disable_line_irq(struct wl1251 *wl)
170 return disable_irq(wl->irq);
173 static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
175 struct sdio_func *func = wl_to_func(wl);
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.
187 ret = pm_runtime_get_sync(&func->dev);
191 sdio_claim_host(func);
192 sdio_enable_func(func);
193 sdio_release_host(func);
195 sdio_claim_host(func);
196 sdio_disable_func(func);
197 sdio_release_host(func);
199 ret = pm_runtime_put_sync(&func->dev);
204 wl->set_power(false);
211 static struct wl1251_if_operations wl1251_sdio_ops = {
212 .read = wl1251_sdio_read,
213 .write = wl1251_sdio_write,
214 .write_elp = wl1251_sdio_write_elp,
215 .read_elp = wl1251_sdio_read_elp,
216 .reset = wl1251_sdio_reset,
217 .power = wl1251_sdio_set_power,
220 static int wl1251_sdio_probe(struct sdio_func *func,
221 const struct sdio_device_id *id)
225 struct ieee80211_hw *hw;
226 struct wl1251_sdio *wl_sdio;
227 const struct wl12xx_platform_data *wl12xx_board_data;
229 hw = wl1251_alloc_hw();
235 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
236 if (wl_sdio == NULL) {
241 sdio_claim_host(func);
242 ret = sdio_enable_func(func);
246 sdio_set_block_size(func, 512);
247 sdio_release_host(func);
249 SET_IEEE80211_DEV(hw, &func->dev);
250 wl_sdio->func = func;
251 wl->if_priv = wl_sdio;
252 wl->if_ops = &wl1251_sdio_ops;
254 wl12xx_board_data = wl12xx_get_platform_data();
255 if (!IS_ERR(wl12xx_board_data)) {
256 wl->set_power = wl12xx_board_data->set_power;
257 wl->irq = wl12xx_board_data->irq;
258 wl->use_eeprom = wl12xx_board_data->use_eeprom;
262 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
264 wl1251_error("request_irq() failed: %d", ret);
268 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
269 disable_irq(wl->irq);
271 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
272 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
274 wl1251_info("using dedicated interrupt line");
276 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
277 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
279 wl1251_info("using SDIO interrupt");
282 ret = wl1251_init_ieee80211(wl);
286 sdio_set_drvdata(func, wl);
288 /* Tell PM core that we don't need the card to be powered now */
289 pm_runtime_put_noidle(&func->dev);
295 free_irq(wl->irq, wl);
297 sdio_claim_host(func);
298 sdio_disable_func(func);
300 sdio_release_host(func);
307 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
309 struct wl1251 *wl = sdio_get_drvdata(func);
310 struct wl1251_sdio *wl_sdio = wl->if_priv;
312 /* Undo decrement done above in wl1251_probe */
313 pm_runtime_get_noresume(&func->dev);
316 free_irq(wl->irq, wl);
320 sdio_claim_host(func);
321 sdio_release_irq(func);
322 sdio_disable_func(func);
323 sdio_release_host(func);
326 static int wl1251_suspend(struct device *dev)
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.
335 static int wl1251_resume(struct device *dev)
340 static const struct dev_pm_ops wl1251_sdio_pm_ops = {
341 .suspend = wl1251_suspend,
342 .resume = wl1251_resume,
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),
350 .drv.pm = &wl1251_sdio_pm_ops,
353 static int __init wl1251_sdio_init(void)
357 err = sdio_register_driver(&wl1251_sdio_driver);
359 wl1251_error("failed to register sdio driver: %d", err);
363 static void __exit wl1251_sdio_exit(void)
365 sdio_unregister_driver(&wl1251_sdio_driver);
366 wl1251_notice("unloaded");
369 module_init(wl1251_sdio_init);
370 module_exit(wl1251_sdio_exit);
372 MODULE_LICENSE("GPL");
373 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");