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,
221 wl1251_show_long_doze(struct device *dev, struct device_attribute *attr,
224 struct wl1251 *wl = dev_get_drvdata(dev);
225 return sprintf(buf, "%d\n", wl->long_doze_mode);
229 wl1251_set_long_doze(struct device *dev, struct device_attribute *attr,
230 const char *buf, size_t count)
232 struct wl1251 *wl = dev_get_drvdata(dev);
235 ret = kstrtoint(buf, 10, &val);
239 wl->long_doze_mode = !!val;
244 wl1251_show_ps_rate_thr(struct device *dev, struct device_attribute *attr,
247 struct wl1251 *wl = dev_get_drvdata(dev);
248 return sprintf(buf, "%u\n", wl->ps_rate_threshold);
252 wl1251_set_ps_rate_thr(struct device *dev, struct device_attribute *attr,
253 const char *buf, size_t count)
255 struct wl1251 *wl = dev_get_drvdata(dev);
259 ret = kstrtouint(buf, 10, &val);
263 wl->ps_rate_threshold = val;
267 static struct device_attribute wl1251_attrs[] = {
268 __ATTR(long_doze_mode, S_IRUGO | S_IWUGO,
269 wl1251_show_long_doze, wl1251_set_long_doze),
270 __ATTR(ps_rate_threshold, S_IRUGO | S_IWUGO,
271 wl1251_show_ps_rate_thr, wl1251_set_ps_rate_thr),
274 static int wl1251_sdio_probe(struct sdio_func *func,
275 const struct sdio_device_id *id)
279 struct ieee80211_hw *hw;
280 struct wl1251_sdio *wl_sdio;
281 const struct wl12xx_platform_data *wl12xx_board_data;
283 hw = wl1251_alloc_hw();
289 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
290 if (wl_sdio == NULL) {
295 sdio_claim_host(func);
296 ret = sdio_enable_func(func);
300 sdio_set_block_size(func, 512);
301 sdio_release_host(func);
303 SET_IEEE80211_DEV(hw, &func->dev);
304 wl_sdio->func = func;
305 wl->if_priv = wl_sdio;
306 wl->if_ops = &wl1251_sdio_ops;
308 wl12xx_board_data = wl12xx_get_platform_data();
309 if (!IS_ERR(wl12xx_board_data)) {
310 wl->set_power = wl12xx_board_data->set_power;
311 wl->irq = wl12xx_board_data->irq;
312 wl->use_eeprom = wl12xx_board_data->use_eeprom;
316 wl->use_eeprom = false;
317 wl->dump_eeprom = dump_eeprom;
320 irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
322 ret = request_threaded_irq(wl->irq, NULL, wl1251_irq,
323 IRQF_ONESHOT, "wl1251", wl);
325 wl1251_error("request_irq() failed: %d", ret);
329 irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
331 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
332 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
334 wl1251_info("using dedicated interrupt line");
336 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
337 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
339 wl1251_info("using SDIO interrupt");
342 ret = wl1251_init_ieee80211(wl);
346 sdio_set_drvdata(func, wl);
348 for (t = 0; t < ARRAY_SIZE(wl1251_attrs); t++) {
349 ret = device_create_file(&func->dev, &wl1251_attrs[t]);
352 device_remove_file(&func->dev,
358 /* Tell PM core that we don't need the card to be powered now */
359 pm_runtime_put_noidle(&func->dev);
365 free_irq(wl->irq, wl);
367 sdio_claim_host(func);
368 sdio_disable_func(func);
370 sdio_release_host(func);
377 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
379 struct wl1251 *wl = sdio_get_drvdata(func);
380 struct wl1251_sdio *wl_sdio = wl->if_priv;
383 /* Undo decrement done above in wl1251_probe */
384 pm_runtime_get_noresume(&func->dev);
386 for (t = 0; t < ARRAY_SIZE(wl1251_attrs); t++)
387 device_remove_file(&func->dev, &wl1251_attrs[t]);
390 free_irq(wl->irq, wl);
394 sdio_claim_host(func);
395 sdio_release_irq(func);
396 sdio_disable_func(func);
397 sdio_release_host(func);
400 static int wl1251_suspend(struct device *dev)
403 * Tell MMC/SDIO core it's OK to power down the card
404 * (if it isn't already), but not to remove it completely.
409 static int wl1251_resume(struct device *dev)
414 static const struct dev_pm_ops wl1251_sdio_pm_ops = {
415 .suspend = wl1251_suspend,
416 .resume = wl1251_resume,
419 static struct sdio_driver wl1251_sdio_driver = {
420 .name = "wl1251_sdio",
421 .id_table = wl1251_devices,
422 .probe = wl1251_sdio_probe,
423 .remove = __devexit_p(wl1251_sdio_remove),
424 .drv.pm = &wl1251_sdio_pm_ops,
427 static int __init wl1251_sdio_init(void)
431 err = sdio_register_driver(&wl1251_sdio_driver);
433 wl1251_error("failed to register sdio driver: %d", err);
437 static void __exit wl1251_sdio_exit(void)
439 sdio_unregister_driver(&wl1251_sdio_driver);
440 wl1251_notice("unloaded");
443 module_init(wl1251_sdio_init);
444 module_exit(wl1251_sdio_exit);
446 MODULE_LICENSE("GPL");
447 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");