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>
31 #include <linux/gpio.h>
35 #ifndef SDIO_VENDOR_ID_TI
36 #define SDIO_VENDOR_ID_TI 0x104c
39 #ifndef SDIO_DEVICE_ID_TI_WL1251
40 #define SDIO_DEVICE_ID_TI_WL1251 0x9066
44 struct sdio_func *func;
48 static struct sdio_func *wl_to_func(struct wl1251 *wl)
50 struct wl1251_sdio *wl_sdio = wl->if_priv;
54 static void wl1251_sdio_interrupt(struct sdio_func *func)
56 struct wl1251 *wl = sdio_get_drvdata(func);
58 wl1251_debug(DEBUG_IRQ, "IRQ");
60 /* FIXME should be synchronous for sdio */
61 ieee80211_queue_work(wl->hw, &wl->irq_work);
64 static const struct sdio_device_id wl1251_devices[] = {
65 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
68 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
71 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
72 void *buf, size_t len)
75 struct sdio_func *func = wl_to_func(wl);
77 sdio_claim_host(func);
78 ret = sdio_memcpy_fromio(func, buf, addr, len);
80 wl1251_error("sdio read failed (%d)", ret);
81 sdio_release_host(func);
84 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
85 void *buf, size_t len)
88 struct sdio_func *func = wl_to_func(wl);
90 sdio_claim_host(func);
91 ret = sdio_memcpy_toio(func, addr, buf, len);
93 wl1251_error("sdio write failed (%d)", ret);
94 sdio_release_host(func);
97 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
100 struct wl1251_sdio *wl_sdio = wl->if_priv;
101 struct sdio_func *func = wl_sdio->func;
104 * The hardware only supports RAW (read after write) access for
105 * reading, regular sdio_readb won't work here (it interprets
106 * the unused bits of CMD52 as write data even if we send read
109 sdio_claim_host(func);
110 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
111 sdio_release_host(func);
114 wl1251_error("sdio_readb failed (%d)", ret);
117 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
120 struct wl1251_sdio *wl_sdio = wl->if_priv;
121 struct sdio_func *func = wl_sdio->func;
123 sdio_claim_host(func);
124 sdio_writeb(func, val, addr, &ret);
125 sdio_release_host(func);
128 wl1251_error("sdio_writeb failed (%d)", ret);
130 wl_sdio->elp_val = val;
133 static void wl1251_sdio_reset(struct wl1251 *wl)
137 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
139 struct sdio_func *func = wl_to_func(wl);
141 sdio_claim_host(func);
142 sdio_claim_irq(func, wl1251_sdio_interrupt);
143 sdio_release_host(func);
146 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
148 struct sdio_func *func = wl_to_func(wl);
150 sdio_claim_host(func);
151 sdio_release_irq(func);
152 sdio_release_host(func);
155 /* Interrupts when using dedicated WLAN_IRQ pin */
156 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
158 struct wl1251 *wl = cookie;
160 ieee80211_queue_work(wl->hw, &wl->irq_work);
165 static void wl1251_enable_line_irq(struct wl1251 *wl)
167 return enable_irq(wl->irq);
170 static void wl1251_disable_line_irq(struct wl1251 *wl)
172 return disable_irq(wl->irq);
175 static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
177 struct sdio_func *func = wl_to_func(wl);
182 * Power is controlled by runtime PM, but we still call board
183 * callback in case it wants to do any additional setup,
184 * for example enabling clock buffer for the module.
186 if (gpio_is_valid(wl->power_gpio))
187 gpio_set_value(wl->power_gpio, true);
190 ret = pm_runtime_get_sync(&func->dev);
192 pm_runtime_put_sync(&func->dev);
196 sdio_claim_host(func);
197 sdio_enable_func(func);
198 sdio_release_host(func);
200 sdio_claim_host(func);
201 sdio_disable_func(func);
202 sdio_release_host(func);
204 ret = pm_runtime_put_sync(&func->dev);
208 if (gpio_is_valid(wl->power_gpio))
209 gpio_set_value(wl->power_gpio, false);
216 static struct wl1251_if_operations wl1251_sdio_ops = {
217 .read = wl1251_sdio_read,
218 .write = wl1251_sdio_write,
219 .write_elp = wl1251_sdio_write_elp,
220 .read_elp = wl1251_sdio_read_elp,
221 .reset = wl1251_sdio_reset,
222 .power = wl1251_sdio_set_power,
225 static int wl1251_sdio_probe(struct sdio_func *func,
226 const struct sdio_device_id *id)
230 struct ieee80211_hw *hw;
231 struct wl1251_sdio *wl_sdio;
232 const struct wl1251_platform_data *wl1251_board_data;
234 hw = wl1251_alloc_hw();
240 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
241 if (wl_sdio == NULL) {
246 sdio_claim_host(func);
247 ret = sdio_enable_func(func);
251 sdio_set_block_size(func, 512);
252 sdio_release_host(func);
254 SET_IEEE80211_DEV(hw, &func->dev);
255 wl_sdio->func = func;
256 wl->if_priv = wl_sdio;
257 wl->if_ops = &wl1251_sdio_ops;
259 wl1251_board_data = wl1251_get_platform_data();
260 if (!IS_ERR(wl1251_board_data)) {
261 wl->power_gpio = wl1251_board_data->power_gpio;
262 wl->irq = wl1251_board_data->irq;
263 wl->use_eeprom = wl1251_board_data->use_eeprom;
266 if (gpio_is_valid(wl->power_gpio)) {
267 ret = devm_gpio_request(&func->dev, wl->power_gpio,
270 wl1251_error("Failed to request gpio: %d\n", ret);
276 irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
277 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
279 wl1251_error("request_irq() failed: %d", ret);
283 irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
285 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
286 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
288 wl1251_info("using dedicated interrupt line");
290 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
291 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
293 wl1251_info("using SDIO interrupt");
296 ret = wl1251_init_ieee80211(wl);
300 sdio_set_drvdata(func, wl);
302 /* Tell PM core that we don't need the card to be powered now */
303 pm_runtime_put_noidle(&func->dev);
309 free_irq(wl->irq, wl);
311 sdio_claim_host(func);
312 sdio_disable_func(func);
314 sdio_release_host(func);
321 static void wl1251_sdio_remove(struct sdio_func *func)
323 struct wl1251 *wl = sdio_get_drvdata(func);
324 struct wl1251_sdio *wl_sdio = wl->if_priv;
326 /* Undo decrement done above in wl1251_probe */
327 pm_runtime_get_noresume(&func->dev);
330 free_irq(wl->irq, wl);
334 sdio_claim_host(func);
335 sdio_release_irq(func);
336 sdio_disable_func(func);
337 sdio_release_host(func);
340 static int wl1251_suspend(struct device *dev)
343 * Tell MMC/SDIO core it's OK to power down the card
344 * (if it isn't already), but not to remove it completely.
349 static int wl1251_resume(struct device *dev)
354 static const struct dev_pm_ops wl1251_sdio_pm_ops = {
355 .suspend = wl1251_suspend,
356 .resume = wl1251_resume,
359 static struct sdio_driver wl1251_sdio_driver = {
360 .name = "wl1251_sdio",
361 .id_table = wl1251_devices,
362 .probe = wl1251_sdio_probe,
363 .remove = wl1251_sdio_remove,
364 .drv.pm = &wl1251_sdio_pm_ops,
367 static int __init wl1251_sdio_init(void)
371 err = sdio_register_driver(&wl1251_sdio_driver);
373 wl1251_error("failed to register sdio driver: %d", err);
377 static void __exit wl1251_sdio_exit(void)
379 sdio_unregister_driver(&wl1251_sdio_driver);
380 wl1251_notice("unloaded");
383 module_init(wl1251_sdio_init);
384 module_exit(wl1251_sdio_exit);
386 MODULE_LICENSE("GPL");
387 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");