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
40 static struct wl12xx_platform_data *wl12xx_board_data;
42 static struct sdio_func *wl_to_func(struct wl1251 *wl)
47 static void wl1251_sdio_interrupt(struct sdio_func *func)
49 struct wl1251 *wl = sdio_get_drvdata(func);
51 wl1251_debug(DEBUG_IRQ, "IRQ");
53 /* FIXME should be synchronous for sdio */
54 ieee80211_queue_work(wl->hw, &wl->irq_work);
57 static const struct sdio_device_id wl1251_devices[] = {
58 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
61 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
64 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
65 void *buf, size_t len)
68 struct sdio_func *func = wl_to_func(wl);
70 sdio_claim_host(func);
71 ret = sdio_memcpy_fromio(func, buf, addr, len);
73 wl1251_error("sdio read failed (%d)", ret);
74 sdio_release_host(func);
77 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
78 void *buf, size_t len)
81 struct sdio_func *func = wl_to_func(wl);
83 sdio_claim_host(func);
84 ret = sdio_memcpy_toio(func, addr, buf, len);
86 wl1251_error("sdio write failed (%d)", ret);
87 sdio_release_host(func);
90 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
93 struct sdio_func *func = wl_to_func(wl);
95 sdio_claim_host(func);
96 *val = sdio_readb_ext(func, addr, &ret, 1);
97 sdio_release_host(func);
100 wl1251_error("sdio_readb failed (%d)", ret);
103 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
106 struct sdio_func *func = wl_to_func(wl);
108 sdio_claim_host(func);
109 sdio_writeb(func, val, addr, &ret);
110 sdio_release_host(func);
113 wl1251_error("sdio_writeb failed (%d)", ret);
116 static void wl1251_sdio_reset(struct wl1251 *wl)
118 extern int sdio_reset_comm(struct mmc_card *card);
119 struct sdio_func *func = wl_to_func(wl);
122 sdio_claim_host(func);
123 sdio_reset_comm(func->card);
124 ret = sdio_enable_func(func);
128 sdio_set_block_size(func, 512);
131 sdio_release_host(func);
134 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
136 struct sdio_func *func = wl_to_func(wl);
138 sdio_claim_host(func);
139 sdio_claim_irq(func, wl1251_sdio_interrupt);
140 sdio_release_host(func);
143 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
145 struct sdio_func *func = wl_to_func(wl);
147 sdio_claim_host(func);
148 sdio_release_irq(func);
149 sdio_release_host(func);
152 /* Interrupts when using dedicated WLAN_IRQ pin */
153 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
155 struct wl1251 *wl = cookie;
157 ieee80211_queue_work(wl->hw, &wl->irq_work);
162 static void wl1251_enable_line_irq(struct wl1251 *wl)
164 return enable_irq(wl->irq);
167 static void wl1251_disable_line_irq(struct wl1251 *wl)
169 return disable_irq(wl->irq);
172 static void wl1251_sdio_set_power(bool enable)
176 static struct wl1251_if_operations wl1251_sdio_ops = {
177 .read = wl1251_sdio_read,
178 .write = wl1251_sdio_write,
179 .write_elp = wl1251_sdio_write_elp,
180 .read_elp = wl1251_sdio_read_elp,
181 .reset = wl1251_sdio_reset,
184 static int wl1251_platform_probe(struct platform_device *pdev)
186 if (pdev->id != -1) {
187 wl1251_error("can only handle single device");
191 wl12xx_board_data = pdev->dev.platform_data;
196 * Dummy platform_driver for passing platform_data to this driver,
197 * until we have a way to pass this through SDIO subsystem or
200 static struct platform_driver wl1251_platform_driver = {
202 .name = "wl1251_data",
203 .owner = THIS_MODULE,
205 .probe = wl1251_platform_probe,
208 static int wl1251_sdio_probe(struct sdio_func *func,
209 const struct sdio_device_id *id)
213 struct ieee80211_hw *hw;
215 hw = wl1251_alloc_hw();
221 sdio_claim_host(func);
222 ret = sdio_enable_func(func);
226 sdio_set_block_size(func, 512);
227 sdio_release_host(func);
229 SET_IEEE80211_DEV(hw, &func->dev);
231 wl->if_ops = &wl1251_sdio_ops;
232 wl->set_power = wl1251_sdio_set_power;
234 if (wl12xx_board_data != NULL) {
235 wl->set_power = wl12xx_board_data->set_power;
236 wl->irq = wl12xx_board_data->irq;
237 wl->use_eeprom = wl12xx_board_data->use_eeprom;
241 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
243 wl1251_error("request_irq() failed: %d", ret);
247 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
248 disable_irq(wl->irq);
250 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
251 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
253 wl1251_info("using dedicated interrupt line");
255 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
256 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
258 wl1251_info("using SDIO interrupt");
261 ret = wl1251_init_ieee80211(wl);
265 /* we can power it down now until it's started */
268 sdio_set_drvdata(func, wl);
273 free_irq(wl->irq, wl);
275 sdio_claim_host(func);
276 sdio_disable_func(func);
278 sdio_release_host(func);
283 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
285 struct wl1251 *wl = sdio_get_drvdata(func);
288 free_irq(wl->irq, wl);
291 sdio_claim_host(func);
292 sdio_release_irq(func);
293 sdio_disable_func(func);
294 sdio_release_host(func);
297 static struct sdio_driver wl1251_sdio_driver = {
298 .name = "wl1251_sdio",
299 .id_table = wl1251_devices,
300 .probe = wl1251_sdio_probe,
301 .remove = __devexit_p(wl1251_sdio_remove),
304 static int __init wl1251_sdio_init(void)
308 err = platform_driver_register(&wl1251_platform_driver);
310 wl1251_error("failed to register platform driver: %d", err);
314 err = sdio_register_driver(&wl1251_sdio_driver);
316 wl1251_error("failed to register sdio driver: %d", err);
320 static void __exit wl1251_sdio_exit(void)
322 sdio_unregister_driver(&wl1251_sdio_driver);
323 platform_driver_unregister(&wl1251_platform_driver);
324 wl1251_notice("unloaded");
327 module_init(wl1251_sdio_init);
328 module_exit(wl1251_sdio_exit);
330 MODULE_LICENSE("GPL");
331 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");