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 /* FIXME should be synchronous for sdio */
61 static const struct sdio_device_id wl1251_devices[] = {
62 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
65 MODULE_DEVICE_TABLE(sdio, wl1251_devices);
68 static void wl1251_sdio_read(struct wl1251 *wl, int addr,
69 void *buf, size_t len)
72 struct sdio_func *func = wl_to_func(wl);
74 sdio_claim_host(func);
75 ret = sdio_memcpy_fromio(func, buf, addr, len);
77 wl1251_error("sdio read failed (%d)", ret);
78 sdio_release_host(func);
81 static void wl1251_sdio_write(struct wl1251 *wl, int addr,
82 void *buf, size_t len)
85 struct sdio_func *func = wl_to_func(wl);
87 sdio_claim_host(func);
88 ret = sdio_memcpy_toio(func, addr, buf, len);
90 wl1251_error("sdio write failed (%d)", ret);
91 sdio_release_host(func);
94 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
97 struct wl1251_sdio *wl_sdio = wl->if_priv;
98 struct sdio_func *func = wl_sdio->func;
101 * The hardware only supports RAW (read after write) access for
102 * reading, regular sdio_readb won't work here (it interprets
103 * the unused bits of CMD52 as write data even if we send read
106 sdio_claim_host(func);
107 *val = sdio_readb_ext(func, addr, &ret, wl_sdio->elp_val);
108 sdio_release_host(func);
111 wl1251_error("sdio_readb failed (%d)", ret);
114 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
117 struct wl1251_sdio *wl_sdio = wl->if_priv;
118 struct sdio_func *func = wl_sdio->func;
120 sdio_claim_host(func);
121 sdio_writeb(func, val, addr, &ret);
122 sdio_release_host(func);
125 wl1251_error("sdio_writeb failed (%d)", ret);
127 wl_sdio->elp_val = val;
130 static void wl1251_sdio_reset(struct wl1251 *wl)
132 extern int sdio_reset_comm(struct mmc_card *card);
133 struct sdio_func *func = wl_to_func(wl);
136 sdio_claim_host(func);
137 sdio_reset_comm(func->card);
138 ret = sdio_enable_func(func);
142 sdio_set_block_size(func, 512);
145 sdio_release_host(func);
148 static void wl1251_sdio_enable_irq(struct wl1251 *wl)
150 struct sdio_func *func = wl_to_func(wl);
152 sdio_claim_host(func);
153 sdio_claim_irq(func, wl1251_sdio_interrupt);
154 sdio_release_host(func);
157 static void wl1251_sdio_disable_irq(struct wl1251 *wl)
159 struct sdio_func *func = wl_to_func(wl);
161 sdio_claim_host(func);
162 sdio_release_irq(func);
163 sdio_release_host(func);
166 /* Interrupts when using dedicated WLAN_IRQ pin */
167 static irqreturn_t wl1251_line_irq(int irq, void *cookie)
169 struct wl1251 *wl = cookie;
176 static void wl1251_enable_line_irq(struct wl1251 *wl)
178 return enable_irq(wl->irq);
181 static void wl1251_disable_line_irq(struct wl1251 *wl)
183 return disable_irq(wl->irq);
186 static void wl1251_sdio_set_power(bool enable)
190 static struct wl1251_if_operations wl1251_sdio_ops = {
191 .read = wl1251_sdio_read,
192 .write = wl1251_sdio_write,
193 .write_elp = wl1251_sdio_write_elp,
194 .read_elp = wl1251_sdio_read_elp,
195 .reset = wl1251_sdio_reset,
198 static int wl1251_platform_probe(struct platform_device *pdev)
200 if (pdev->id != -1) {
201 wl1251_error("can only handle single device");
205 wl12xx_board_data = pdev->dev.platform_data;
210 * Dummy platform_driver for passing platform_data to this driver,
211 * until we have a way to pass this through SDIO subsystem or
214 static struct platform_driver wl1251_platform_driver = {
216 .name = "wl1251_data",
217 .owner = THIS_MODULE,
219 .probe = wl1251_platform_probe,
222 static int wl1251_sdio_probe(struct sdio_func *func,
223 const struct sdio_device_id *id)
227 struct ieee80211_hw *hw;
228 struct wl1251_sdio *wl_sdio;
230 hw = wl1251_alloc_hw();
236 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
237 if (wl_sdio == NULL) {
242 sdio_claim_host(func);
243 ret = sdio_enable_func(func);
247 sdio_set_block_size(func, 512);
248 sdio_release_host(func);
250 SET_IEEE80211_DEV(hw, &func->dev);
251 wl_sdio->func = func;
252 wl->if_priv = wl_sdio;
253 wl->if_ops = &wl1251_sdio_ops;
254 wl->set_power = wl1251_sdio_set_power;
256 if (wl12xx_board_data != NULL) {
257 wl->set_power = wl12xx_board_data->set_power;
258 wl->irq = wl12xx_board_data->irq;
259 wl->use_eeprom = wl12xx_board_data->use_eeprom;
263 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
265 wl1251_error("request_irq() failed: %d", ret);
269 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
270 disable_irq(wl->irq);
272 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
273 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
275 wl1251_info("using dedicated interrupt line");
277 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
278 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
280 wl1251_info("using SDIO interrupt");
283 ret = wl1251_init_ieee80211(wl);
287 /* we can power it down now until it's started */
290 sdio_set_drvdata(func, wl);
295 free_irq(wl->irq, wl);
297 sdio_claim_host(func);
298 sdio_disable_func(func);
300 sdio_release_host(func);
307 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
309 struct wl1251 *wl = sdio_get_drvdata(func);
310 struct wl1251_sdio *wl_sdio = wl->if_priv;
313 free_irq(wl->irq, wl);
317 sdio_claim_host(func);
318 sdio_release_irq(func);
319 sdio_disable_func(func);
320 sdio_release_host(func);
323 static struct sdio_driver wl1251_sdio_driver = {
324 .name = "wl1251_sdio",
325 .id_table = wl1251_devices,
326 .probe = wl1251_sdio_probe,
327 .remove = __devexit_p(wl1251_sdio_remove),
330 static int __init wl1251_sdio_init(void)
334 err = platform_driver_register(&wl1251_platform_driver);
336 wl1251_error("failed to register platform driver: %d", err);
340 err = sdio_register_driver(&wl1251_sdio_driver);
342 wl1251_error("failed to register sdio driver: %d", err);
346 static void __exit wl1251_sdio_exit(void)
348 sdio_unregister_driver(&wl1251_sdio_driver);
349 platform_driver_unregister(&wl1251_platform_driver);
350 wl1251_notice("unloaded");
353 module_init(wl1251_sdio_init);
354 module_exit(wl1251_sdio_exit);
356 MODULE_LICENSE("GPL");
357 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");