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_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
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)
136 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
138 struct sdio_func *func = wl_to_func(wl);
140 sdio_claim_host(func);
141 sdio_claim_irq(func, wl1251_sdio_interrupt);
142 sdio_release_host(func);
145 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
147 struct sdio_func *func = wl_to_func(wl);
149 sdio_claim_host(func);
150 sdio_release_irq(func);
151 sdio_release_host(func);
154 /* Interrupts when using dedicated WLAN_IRQ pin */
155 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
157 struct wl1251 *wl = cookie;
159 ieee80211_queue_work(wl->hw, &wl->irq_work);
164 static void wl1251_enable_line_irq(struct wl1251 *wl)
166 return enable_irq(wl->irq);
169 static void wl1251_disable_line_irq(struct wl1251 *wl)
171 return disable_irq(wl->irq);
174 static void wl1251_sdio_set_power(bool enable)
178 static struct wl1251_if_operations wl1251_sdio_ops = {
179 .read = wl1251_sdio_read,
180 .write = wl1251_sdio_write,
181 .write_elp = wl1251_sdio_write_elp,
182 .read_elp = wl1251_sdio_read_elp,
183 .reset = wl1251_sdio_reset,
186 static int wl1251_platform_probe(struct platform_device *pdev)
188 if (pdev->id != -1) {
189 wl1251_error("can only handle single device");
193 wl12xx_board_data = pdev->dev.platform_data;
198 * Dummy platform_driver for passing platform_data to this driver,
199 * until we have a way to pass this through SDIO subsystem or
202 static struct platform_driver wl1251_platform_driver = {
204 .name = "wl1251_data",
205 .owner = THIS_MODULE,
207 .probe = wl1251_platform_probe,
210 static int wl1251_sdio_probe(struct sdio_func *func,
211 const struct sdio_device_id *id)
215 struct ieee80211_hw *hw;
216 struct wl1251_sdio *wl_sdio;
218 hw = wl1251_alloc_hw();
224 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
225 if (wl_sdio == NULL) {
230 sdio_claim_host(func);
231 ret = sdio_enable_func(func);
235 sdio_set_block_size(func, 512);
236 sdio_release_host(func);
238 SET_IEEE80211_DEV(hw, &func->dev);
239 wl_sdio->func = func;
240 wl->if_priv = wl_sdio;
241 wl->if_ops = &wl1251_sdio_ops;
242 wl->set_power = wl1251_sdio_set_power;
244 if (wl12xx_board_data != NULL) {
245 wl->set_power = wl12xx_board_data->set_power;
246 wl->irq = wl12xx_board_data->irq;
247 wl->use_eeprom = wl12xx_board_data->use_eeprom;
251 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
253 wl1251_error("request_irq() failed: %d", ret);
257 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
258 disable_irq(wl->irq);
260 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
261 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
263 wl1251_info("using dedicated interrupt line");
265 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
266 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
268 wl1251_info("using SDIO interrupt");
271 ret = wl1251_init_ieee80211(wl);
275 sdio_set_drvdata(func, wl);
280 free_irq(wl->irq, wl);
282 sdio_claim_host(func);
283 sdio_disable_func(func);
285 sdio_release_host(func);
292 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
294 struct wl1251 *wl = sdio_get_drvdata(func);
295 struct wl1251_sdio *wl_sdio = wl->if_priv;
298 free_irq(wl->irq, wl);
302 sdio_claim_host(func);
303 sdio_release_irq(func);
304 sdio_disable_func(func);
305 sdio_release_host(func);
308 static struct sdio_driver wl1251_sdio_driver = {
309 .name = "wl1251_sdio",
310 .id_table = wl1251_devices,
311 .probe = wl1251_sdio_probe,
312 .remove = __devexit_p(wl1251_sdio_remove),
315 static int __init wl1251_sdio_init(void)
319 err = platform_driver_register(&wl1251_platform_driver);
321 wl1251_error("failed to register platform driver: %d", err);
325 err = sdio_register_driver(&wl1251_sdio_driver);
327 wl1251_error("failed to register sdio driver: %d", err);
331 static void __exit wl1251_sdio_exit(void)
333 sdio_unregister_driver(&wl1251_sdio_driver);
334 platform_driver_unregister(&wl1251_platform_driver);
335 wl1251_notice("unloaded");
338 module_init(wl1251_sdio_init);
339 module_exit(wl1251_sdio_exit);
341 MODULE_LICENSE("GPL");
342 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");