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/spi/wl12xx.h>
28 #include <linux/irq.h>
32 #ifndef SDIO_VENDOR_ID_TI
33 #define SDIO_VENDOR_ID_TI 0x104c
36 #ifndef SDIO_DEVICE_ID_TI_WL1251
37 #define SDIO_DEVICE_ID_TI_WL1251 0x9066
41 struct sdio_func *func;
45 static struct wl12xx_platform_data *wl12xx_board_data;
47 static struct sdio_func *wl_to_func(struct wl1251 *wl)
49 struct wl1251_sdio *wl_sdio = wl->if_priv;
53 static void wl1251_sdio_interrupt(struct sdio_func *func)
55 struct wl1251 *wl = sdio_get_drvdata(func);
57 wl1251_debug(DEBUG_IRQ, "IRQ");
59 /* FIXME should be synchronous for sdio */
60 ieee80211_queue_work(wl->hw, &wl->irq_work);
63 static const struct sdio_device_id wl1251_devices[] = {
64 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
67 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
70 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
71 void *buf, size_t len)
74 struct sdio_func *func = wl_to_func(wl);
76 sdio_claim_host(func);
77 ret = sdio_memcpy_fromio(func, buf, addr, len);
79 wl1251_error("sdio read failed (%d)", ret);
80 sdio_release_host(func);
83 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
84 void *buf, size_t len)
87 struct sdio_func *func = wl_to_func(wl);
89 sdio_claim_host(func);
90 ret = sdio_memcpy_toio(func, addr, buf, len);
92 wl1251_error("sdio write failed (%d)", ret);
93 sdio_release_host(func);
96 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
99 struct wl1251_sdio *wl_sdio = wl->if_priv;
100 struct sdio_func *func = wl_sdio->func;
103 * The hardware only supports RAW (read after write) access for
104 * reading, regular sdio_readb won't work here (it interprets
105 * the unused bits of CMD52 as write data even if we send read
108 sdio_claim_host(func);
109 *val = sdio_readb_ext(func, addr, &ret, wl_sdio->elp_val);
110 sdio_release_host(func);
113 wl1251_error("sdio_readb failed (%d)", ret);
116 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
119 struct wl1251_sdio *wl_sdio = wl->if_priv;
120 struct sdio_func *func = wl_sdio->func;
122 sdio_claim_host(func);
123 sdio_writeb(func, val, addr, &ret);
124 sdio_release_host(func);
127 wl1251_error("sdio_writeb failed (%d)", ret);
129 wl_sdio->elp_val = val;
132 static void wl1251_sdio_reset(struct wl1251 *wl)
134 extern int sdio_reset_comm(struct mmc_card *card);
135 struct sdio_func *func = wl_to_func(wl);
138 sdio_claim_host(func);
139 sdio_reset_comm(func->card);
140 ret = sdio_enable_func(func);
144 sdio_set_block_size(func, 512);
147 sdio_release_host(func);
150 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
152 struct sdio_func *func = wl_to_func(wl);
154 sdio_claim_host(func);
155 sdio_claim_irq(func, wl1251_sdio_interrupt);
156 sdio_release_host(func);
159 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
161 struct sdio_func *func = wl_to_func(wl);
163 sdio_claim_host(func);
164 sdio_release_irq(func);
165 sdio_release_host(func);
168 /* Interrupts when using dedicated WLAN_IRQ pin */
169 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
171 struct wl1251 *wl = cookie;
173 ieee80211_queue_work(wl->hw, &wl->irq_work);
178 static void wl1251_enable_line_irq(struct wl1251 *wl)
180 return enable_irq(wl->irq);
183 static void wl1251_disable_line_irq(struct wl1251 *wl)
185 return disable_irq(wl->irq);
188 static void wl1251_sdio_set_power(bool enable)
192 static struct wl1251_if_operations wl1251_sdio_ops = {
193 .read = wl1251_sdio_read,
194 .write = wl1251_sdio_write,
195 .write_elp = wl1251_sdio_write_elp,
196 .read_elp = wl1251_sdio_read_elp,
197 .reset = wl1251_sdio_reset,
200 static int wl1251_platform_probe(struct platform_device *pdev)
202 if (pdev->id != -1) {
203 wl1251_error("can only handle single device");
207 wl12xx_board_data = pdev->dev.platform_data;
212 * Dummy platform_driver for passing platform_data to this driver,
213 * until we have a way to pass this through SDIO subsystem or
216 static struct platform_driver wl1251_platform_driver = {
218 .name = "wl1251_data",
219 .owner = THIS_MODULE,
221 .probe = wl1251_platform_probe,
224 static int wl1251_sdio_probe(struct sdio_func *func,
225 const struct sdio_device_id *id)
229 struct ieee80211_hw *hw;
230 struct wl1251_sdio *wl_sdio;
232 hw = wl1251_alloc_hw();
238 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
239 if (wl_sdio == NULL) {
244 sdio_claim_host(func);
245 ret = sdio_enable_func(func);
249 sdio_set_block_size(func, 512);
250 sdio_release_host(func);
252 SET_IEEE80211_DEV(hw, &func->dev);
253 wl_sdio->func = func;
254 wl->if_priv = wl_sdio;
255 wl->if_ops = &wl1251_sdio_ops;
256 wl->set_power = wl1251_sdio_set_power;
258 if (wl12xx_board_data != NULL) {
259 wl->set_power = wl12xx_board_data->set_power;
260 wl->irq = wl12xx_board_data->irq;
261 wl->use_eeprom = wl12xx_board_data->use_eeprom;
265 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
267 wl1251_error("request_irq() failed: %d", ret);
271 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
272 disable_irq(wl->irq);
274 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
275 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
277 wl1251_info("using dedicated interrupt line");
279 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
280 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
282 wl1251_info("using SDIO interrupt");
285 ret = wl1251_init_ieee80211(wl);
289 /* we can power it down now until it's started */
292 sdio_set_drvdata(func, wl);
297 free_irq(wl->irq, wl);
299 sdio_claim_host(func);
300 sdio_disable_func(func);
302 sdio_release_host(func);
309 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
311 struct wl1251 *wl = sdio_get_drvdata(func);
312 struct wl1251_sdio *wl_sdio = wl->if_priv;
315 free_irq(wl->irq, wl);
319 sdio_claim_host(func);
320 sdio_release_irq(func);
321 sdio_disable_func(func);
322 sdio_release_host(func);
325 static struct sdio_driver wl1251_sdio_driver = {
326 .name = "wl1251_sdio",
327 .id_table = wl1251_devices,
328 .probe = wl1251_sdio_probe,
329 .remove = __devexit_p(wl1251_sdio_remove),
332 static int __init wl1251_sdio_init(void)
336 err = platform_driver_register(&wl1251_platform_driver);
338 wl1251_error("failed to register platform driver: %d", err);
342 err = sdio_register_driver(&wl1251_sdio_driver);
344 wl1251_error("failed to register sdio driver: %d", err);
348 static void __exit wl1251_sdio_exit(void)
350 sdio_unregister_driver(&wl1251_sdio_driver);
351 platform_driver_unregister(&wl1251_platform_driver);
352 wl1251_notice("unloaded");
355 module_init(wl1251_sdio_init);
356 module_exit(wl1251_sdio_exit);
358 MODULE_LICENSE("GPL");
359 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");