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/wl12xx.h>
28 #include <linux/irq.h>
29 #include <linux/pm_runtime.h>
33 #ifndef SDIO_VENDOR_ID_TI
34 #define SDIO_VENDOR_ID_TI 0x104c
37 #ifndef SDIO_DEVICE_ID_TI_WL1251
38 #define SDIO_DEVICE_ID_TI_WL1251 0x9066
42 struct sdio_func
*func
;
46 static struct wl12xx_platform_data
*wl12xx_board_data
;
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.
189 ret
= pm_runtime_get_sync(&func
->dev
);
193 sdio_claim_host(func
);
194 sdio_enable_func(func
);
195 sdio_release_host(func
);
197 sdio_claim_host(func
);
198 sdio_disable_func(func
);
199 sdio_release_host(func
);
201 ret
= pm_runtime_put_sync(&func
->dev
);
206 wl
->set_power(false);
213 static struct wl1251_if_operations wl1251_sdio_ops
= {
214 .read
= wl1251_sdio_read
,
215 .write
= wl1251_sdio_write
,
216 .write_elp
= wl1251_sdio_write_elp
,
217 .read_elp
= wl1251_sdio_read_elp
,
218 .reset
= wl1251_sdio_reset
,
219 .power
= wl1251_sdio_set_power
,
222 static int wl1251_platform_probe(struct platform_device
*pdev
)
224 if (pdev
->id
!= -1) {
225 wl1251_error("can only handle single device");
229 wl12xx_board_data
= pdev
->dev
.platform_data
;
234 * Dummy platform_driver for passing platform_data to this driver,
235 * until we have a way to pass this through SDIO subsystem or
238 static struct platform_driver wl1251_platform_driver
= {
240 .name
= "wl1251_data",
241 .owner
= THIS_MODULE
,
243 .probe
= wl1251_platform_probe
,
246 static int wl1251_sdio_probe(struct sdio_func
*func
,
247 const struct sdio_device_id
*id
)
251 struct ieee80211_hw
*hw
;
252 struct wl1251_sdio
*wl_sdio
;
254 hw
= wl1251_alloc_hw();
260 wl_sdio
= kzalloc(sizeof(*wl_sdio
), GFP_KERNEL
);
261 if (wl_sdio
== NULL
) {
266 sdio_claim_host(func
);
267 ret
= sdio_enable_func(func
);
271 sdio_set_block_size(func
, 512);
272 sdio_release_host(func
);
274 SET_IEEE80211_DEV(hw
, &func
->dev
);
275 wl_sdio
->func
= func
;
276 wl
->if_priv
= wl_sdio
;
277 wl
->if_ops
= &wl1251_sdio_ops
;
279 if (wl12xx_board_data
!= NULL
) {
280 wl
->set_power
= wl12xx_board_data
->set_power
;
281 wl
->irq
= wl12xx_board_data
->irq
;
282 wl
->use_eeprom
= wl12xx_board_data
->use_eeprom
;
286 ret
= request_irq(wl
->irq
, wl1251_line_irq
, 0, "wl1251", wl
);
288 wl1251_error("request_irq() failed: %d", ret
);
292 set_irq_type(wl
->irq
, IRQ_TYPE_EDGE_RISING
);
293 disable_irq(wl
->irq
);
295 wl1251_sdio_ops
.enable_irq
= wl1251_enable_line_irq
;
296 wl1251_sdio_ops
.disable_irq
= wl1251_disable_line_irq
;
298 wl1251_info("using dedicated interrupt line");
300 wl1251_sdio_ops
.enable_irq
= wl1251_sdio_enable_irq
;
301 wl1251_sdio_ops
.disable_irq
= wl1251_sdio_disable_irq
;
303 wl1251_info("using SDIO interrupt");
306 ret
= wl1251_init_ieee80211(wl
);
310 sdio_set_drvdata(func
, wl
);
312 /* Tell PM core that we don't need the card to be powered now */
313 pm_runtime_put_noidle(&func
->dev
);
319 free_irq(wl
->irq
, wl
);
321 sdio_claim_host(func
);
322 sdio_disable_func(func
);
324 sdio_release_host(func
);
331 static void __devexit
wl1251_sdio_remove(struct sdio_func
*func
)
333 struct wl1251
*wl
= sdio_get_drvdata(func
);
334 struct wl1251_sdio
*wl_sdio
= wl
->if_priv
;
336 /* Undo decrement done above in wl1251_probe */
337 pm_runtime_get_noresume(&func
->dev
);
340 free_irq(wl
->irq
, wl
);
344 sdio_claim_host(func
);
345 sdio_release_irq(func
);
346 sdio_disable_func(func
);
347 sdio_release_host(func
);
350 static int wl1251_suspend(struct device
*dev
)
353 * Tell MMC/SDIO core it's OK to power down the card
354 * (if it isn't already), but not to remove it completely.
359 static int wl1251_resume(struct device
*dev
)
364 static const struct dev_pm_ops wl1251_sdio_pm_ops
= {
365 .suspend
= wl1251_suspend
,
366 .resume
= wl1251_resume
,
369 static struct sdio_driver wl1251_sdio_driver
= {
370 .name
= "wl1251_sdio",
371 .id_table
= wl1251_devices
,
372 .probe
= wl1251_sdio_probe
,
373 .remove
= __devexit_p(wl1251_sdio_remove
),
374 .drv
.pm
= &wl1251_sdio_pm_ops
,
377 static int __init
wl1251_sdio_init(void)
381 err
= platform_driver_register(&wl1251_platform_driver
);
383 wl1251_error("failed to register platform driver: %d", err
);
387 err
= sdio_register_driver(&wl1251_sdio_driver
);
389 wl1251_error("failed to register sdio driver: %d", err
);
393 static void __exit
wl1251_sdio_exit(void)
395 sdio_unregister_driver(&wl1251_sdio_driver
);
396 platform_driver_unregister(&wl1251_platform_driver
);
397 wl1251_notice("unloaded");
400 module_init(wl1251_sdio_init
);
401 module_exit(wl1251_sdio_exit
);
403 MODULE_LICENSE("GPL");
404 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");