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/interrupt.h>
23 #include <linux/module.h>
24 #include <linux/mod_devicetable.h>
25 #include <linux/mmc/sdio_func.h>
26 #include <linux/mmc/sdio_ids.h>
27 #include <linux/platform_device.h>
28 #include <linux/wl12xx.h>
29 #include <linux/irq.h>
30 #include <linux/pm_runtime.h>
34 static bool force_nvs_file = false;
35 module_param(force_nvs_file, bool, 0644);
36 MODULE_PARM_DESC(force_nvs_file, "Force loading NVS data from file, "
37 "not EEPROM. Default: n/N/0");
38 static bool dump_eeprom = false;
39 module_param(dump_eeprom, bool, 0644);
40 MODULE_PARM_DESC(dump_eeprom, "Dump EEPROM on module load and makes it "
41 "accessable through debugfs. Default: n/N/0");
43 #ifndef SDIO_VENDOR_ID_TI
44 #define SDIO_VENDOR_ID_TI 0x104c
47 #ifndef SDIO_DEVICE_ID_TI_WL1251
48 #define SDIO_DEVICE_ID_TI_WL1251 0x9066
52 struct sdio_func *func;
56 static struct sdio_func *wl_to_func(struct wl1251 *wl)
58 struct wl1251_sdio *wl_sdio = wl->if_priv;
62 static void wl1251_sdio_interrupt(struct sdio_func *func)
64 struct wl1251 *wl = sdio_get_drvdata(func);
66 wl1251_debug(DEBUG_IRQ, "IRQ");
68 /* FIXME should be synchronous for sdio */
69 ieee80211_queue_work(wl->hw, &wl->irq_work);
72 static const struct sdio_device_id wl1251_devices[] = {
73 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
76 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
79 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
80 void *buf, size_t len)
83 struct sdio_func *func = wl_to_func(wl);
85 sdio_claim_host(func);
86 ret = sdio_memcpy_fromio(func, buf, addr, len);
88 wl1251_error("sdio read failed (%d)", ret);
89 sdio_release_host(func);
92 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
93 void *buf, size_t len)
96 struct sdio_func *func = wl_to_func(wl);
98 sdio_claim_host(func);
99 ret = sdio_memcpy_toio(func, addr, buf, len);
101 wl1251_error("sdio write failed (%d)", ret);
102 sdio_release_host(func);
105 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
108 struct wl1251_sdio *wl_sdio = wl->if_priv;
109 struct sdio_func *func = wl_sdio->func;
112 * The hardware only supports RAW (read after write) access for
113 * reading, regular sdio_readb won't work here (it interprets
114 * the unused bits of CMD52 as write data even if we send read
117 sdio_claim_host(func);
118 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
119 sdio_release_host(func);
122 wl1251_error("sdio_readb failed (%d)", ret);
125 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
128 struct wl1251_sdio *wl_sdio = wl->if_priv;
129 struct sdio_func *func = wl_sdio->func;
131 sdio_claim_host(func);
132 sdio_writeb(func, val, addr, &ret);
133 sdio_release_host(func);
136 wl1251_error("sdio_writeb failed (%d)", ret);
138 wl_sdio->elp_val = val;
141 static void wl1251_sdio_reset(struct wl1251 *wl)
145 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
147 struct sdio_func *func = wl_to_func(wl);
149 sdio_claim_host(func);
150 sdio_claim_irq(func, wl1251_sdio_interrupt);
151 sdio_release_host(func);
154 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
156 struct sdio_func *func = wl_to_func(wl);
158 sdio_claim_host(func);
159 sdio_release_irq(func);
160 sdio_release_host(func);
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 wl->use_eeprom = false;
263 wl->dump_eeprom = dump_eeprom;
266 irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
268 ret = request_threaded_irq(wl->irq, NULL, wl1251_irq,
269 IRQF_ONESHOT, "wl1251", wl);
271 wl1251_error("request_irq() failed: %d", ret);
275 irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
277 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
278 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
280 wl1251_info("using dedicated interrupt line");
282 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
283 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
285 wl1251_info("using SDIO interrupt");
288 ret = wl1251_init_ieee80211(wl);
292 sdio_set_drvdata(func, wl);
294 /* Tell PM core that we don't need the card to be powered now */
295 pm_runtime_put_noidle(&func->dev);
301 free_irq(wl->irq, wl);
303 sdio_claim_host(func);
304 sdio_disable_func(func);
306 sdio_release_host(func);
313 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
315 struct wl1251 *wl = sdio_get_drvdata(func);
316 struct wl1251_sdio *wl_sdio = wl->if_priv;
318 /* Undo decrement done above in wl1251_probe */
319 pm_runtime_get_noresume(&func->dev);
322 free_irq(wl->irq, wl);
326 sdio_claim_host(func);
327 sdio_release_irq(func);
328 sdio_disable_func(func);
329 sdio_release_host(func);
332 static int wl1251_suspend(struct device *dev)
335 * Tell MMC/SDIO core it's OK to power down the card
336 * (if it isn't already), but not to remove it completely.
341 static int wl1251_resume(struct device *dev)
346 static const struct dev_pm_ops wl1251_sdio_pm_ops = {
347 .suspend = wl1251_suspend,
348 .resume = wl1251_resume,
351 static struct sdio_driver wl1251_sdio_driver = {
352 .name = "wl1251_sdio",
353 .id_table = wl1251_devices,
354 .probe = wl1251_sdio_probe,
355 .remove = __devexit_p(wl1251_sdio_remove),
356 .drv.pm = &wl1251_sdio_pm_ops,
359 static int __init wl1251_sdio_init(void)
363 err = sdio_register_driver(&wl1251_sdio_driver);
365 wl1251_error("failed to register sdio driver: %d", err);
369 static void __exit wl1251_sdio_exit(void)
371 sdio_unregister_driver(&wl1251_sdio_driver);
372 wl1251_notice("unloaded");
375 module_init(wl1251_sdio_init);
376 module_exit(wl1251_sdio_exit);
378 MODULE_LICENSE("GPL");
379 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");