2 * Mac80211 SDIO driver for ST-Ericsson CW1200 device
4 * Copyright (c) 2010, ST-Ericsson
5 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/interrupt.h>
14 #include <linux/gpio.h>
15 #include <linux/delay.h>
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/sdio_func.h>
18 #include <linux/mmc/card.h>
19 #include <linux/mmc/sdio.h>
20 #include <net/mac80211.h>
24 #include <linux/platform_data/net-cw1200.h>
27 MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
28 MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SDIO driver");
29 MODULE_LICENSE("GPL");
31 #define SDIO_BLOCK_SIZE (512)
33 /* Default platform data for Sagrad modules */
34 static struct cw1200_platform_data_sdio sagrad_109x_evk_platform_data = {
37 .sdd_file = "/*(DEBLOBBED)*/",
40 /* Allow platform data to be overridden */
41 static struct cw1200_platform_data_sdio *global_plat_data = &sagrad_109x_evk_platform_data;
43 void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata)
45 global_plat_data = pdata;
49 struct sdio_func *func;
50 struct cw1200_common *core;
51 const struct cw1200_platform_data_sdio *pdata;
54 #ifndef SDIO_VENDOR_ID_STE
55 #define SDIO_VENDOR_ID_STE 0x0020
58 #ifndef SDIO_DEVICE_ID_STE_CW1200
59 #define SDIO_DEVICE_ID_STE_CW1200 0x2280
62 static const struct sdio_device_id cw1200_sdio_ids[] = {
63 { SDIO_DEVICE(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200) },
64 { /* end: all zeroes */ },
66 MODULE_DEVICE_TABLE(sdio, cw1200_sdio_ids);
68 /* hwbus_ops implemetation */
70 static int cw1200_sdio_memcpy_fromio(struct hwbus_priv *self,
74 return sdio_memcpy_fromio(self->func, dst, addr, count);
77 static int cw1200_sdio_memcpy_toio(struct hwbus_priv *self,
79 const void *src, int count)
81 return sdio_memcpy_toio(self->func, addr, (void *)src, count);
84 static void cw1200_sdio_lock(struct hwbus_priv *self)
86 sdio_claim_host(self->func);
89 static void cw1200_sdio_unlock(struct hwbus_priv *self)
91 sdio_release_host(self->func);
94 static void cw1200_sdio_irq_handler(struct sdio_func *func)
96 struct hwbus_priv *self = sdio_get_drvdata(func);
98 /* note: sdio_host already claimed here. */
100 cw1200_irq_handler(self->core);
103 static irqreturn_t cw1200_gpio_hardirq(int irq, void *dev_id)
105 return IRQ_WAKE_THREAD;
108 static irqreturn_t cw1200_gpio_irq(int irq, void *dev_id)
110 struct hwbus_priv *self = dev_id;
113 cw1200_sdio_lock(self);
114 cw1200_irq_handler(self->core);
115 cw1200_sdio_unlock(self);
122 static int cw1200_request_irq(struct hwbus_priv *self)
127 cccr = sdio_f0_readb(self->func, SDIO_CCCR_IENx, &ret);
131 /* Master interrupt enable ... */
134 /* ... for our function */
135 cccr |= BIT(self->func->num);
137 sdio_f0_writeb(self->func, cccr, SDIO_CCCR_IENx, &ret);
141 ret = enable_irq_wake(self->pdata->irq);
145 /* Request the IRQ */
146 ret = request_threaded_irq(self->pdata->irq, cw1200_gpio_hardirq,
148 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
149 "cw1200_wlan_irq", self);
159 static int cw1200_sdio_irq_subscribe(struct hwbus_priv *self)
163 pr_debug("SW IRQ subscribe\n");
164 sdio_claim_host(self->func);
165 if (self->pdata->irq)
166 ret = cw1200_request_irq(self);
168 ret = sdio_claim_irq(self->func, cw1200_sdio_irq_handler);
170 sdio_release_host(self->func);
174 static int cw1200_sdio_irq_unsubscribe(struct hwbus_priv *self)
178 pr_debug("SW IRQ unsubscribe\n");
180 if (self->pdata->irq) {
181 disable_irq_wake(self->pdata->irq);
182 free_irq(self->pdata->irq, self);
184 sdio_claim_host(self->func);
185 ret = sdio_release_irq(self->func);
186 sdio_release_host(self->func);
191 static int cw1200_sdio_off(const struct cw1200_platform_data_sdio *pdata)
194 gpio_set_value(pdata->reset, 0);
195 msleep(30); /* Min is 2 * CLK32K cycles */
196 gpio_free(pdata->reset);
199 if (pdata->power_ctrl)
200 pdata->power_ctrl(pdata, false);
202 pdata->clk_ctrl(pdata, false);
207 static int cw1200_sdio_on(const struct cw1200_platform_data_sdio *pdata)
209 /* Ensure I/Os are pulled low */
211 gpio_request(pdata->reset, "cw1200_wlan_reset");
212 gpio_direction_output(pdata->reset, 0);
214 if (pdata->powerup) {
215 gpio_request(pdata->powerup, "cw1200_wlan_powerup");
216 gpio_direction_output(pdata->powerup, 0);
218 if (pdata->reset || pdata->powerup)
219 msleep(10); /* Settle time? */
221 /* Enable 3v3 and 1v8 to hardware */
222 if (pdata->power_ctrl) {
223 if (pdata->power_ctrl(pdata, true)) {
224 pr_err("power_ctrl() failed!\n");
230 if (pdata->clk_ctrl) {
231 if (pdata->clk_ctrl(pdata, true)) {
232 pr_err("clk_ctrl() failed!\n");
235 msleep(10); /* Delay until clock is stable for 2 cycles */
238 /* Enable POWERUP signal */
239 if (pdata->powerup) {
240 gpio_set_value(pdata->powerup, 1);
241 msleep(250); /* or more..? */
243 /* Enable RSTn signal */
245 gpio_set_value(pdata->reset, 1);
246 msleep(50); /* Or more..? */
251 static size_t cw1200_sdio_align_size(struct hwbus_priv *self, size_t size)
253 if (self->pdata->no_nptb)
254 size = round_up(size, SDIO_BLOCK_SIZE);
256 size = sdio_align_size(self->func, size);
261 static int cw1200_sdio_pm(struct hwbus_priv *self, bool suspend)
265 if (self->pdata->irq)
266 ret = irq_set_irq_wake(self->pdata->irq, suspend);
270 static const struct hwbus_ops cw1200_sdio_hwbus_ops = {
271 .hwbus_memcpy_fromio = cw1200_sdio_memcpy_fromio,
272 .hwbus_memcpy_toio = cw1200_sdio_memcpy_toio,
273 .lock = cw1200_sdio_lock,
274 .unlock = cw1200_sdio_unlock,
275 .align_size = cw1200_sdio_align_size,
276 .power_mgmt = cw1200_sdio_pm,
279 /* Probe Function to be called by SDIO stack when device is discovered */
280 static int cw1200_sdio_probe(struct sdio_func *func,
281 const struct sdio_device_id *id)
283 struct hwbus_priv *self;
286 pr_info("cw1200_wlan_sdio: Probe called\n");
288 /* We are only able to handle the wlan function */
289 if (func->num != 0x01)
292 self = kzalloc(sizeof(*self), GFP_KERNEL);
294 pr_err("Can't allocate SDIO hwbus_priv.\n");
298 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
300 self->pdata = global_plat_data; /* FIXME */
302 sdio_set_drvdata(func, self);
303 sdio_claim_host(func);
304 sdio_enable_func(func);
305 sdio_release_host(func);
307 status = cw1200_sdio_irq_subscribe(self);
309 status = cw1200_core_probe(&cw1200_sdio_hwbus_ops,
310 self, &func->dev, &self->core,
311 self->pdata->ref_clk,
312 self->pdata->macaddr,
313 self->pdata->sdd_file,
314 self->pdata->have_5ghz);
316 cw1200_sdio_irq_unsubscribe(self);
317 sdio_claim_host(func);
318 sdio_disable_func(func);
319 sdio_release_host(func);
320 sdio_set_drvdata(func, NULL);
327 /* Disconnect Function to be called by SDIO stack when
328 * device is disconnected
330 static void cw1200_sdio_disconnect(struct sdio_func *func)
332 struct hwbus_priv *self = sdio_get_drvdata(func);
335 cw1200_sdio_irq_unsubscribe(self);
337 cw1200_core_release(self->core);
340 sdio_claim_host(func);
341 sdio_disable_func(func);
342 sdio_release_host(func);
343 sdio_set_drvdata(func, NULL);
349 static int cw1200_sdio_suspend(struct device *dev)
352 struct sdio_func *func = dev_to_sdio_func(dev);
353 struct hwbus_priv *self = sdio_get_drvdata(func);
355 if (!cw1200_can_suspend(self->core))
358 /* Notify SDIO that CW1200 will remain powered during suspend */
359 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
361 pr_err("Error setting SDIO pm flags: %i\n", ret);
366 static int cw1200_sdio_resume(struct device *dev)
371 static const struct dev_pm_ops cw1200_pm_ops = {
372 .suspend = cw1200_sdio_suspend,
373 .resume = cw1200_sdio_resume,
377 static struct sdio_driver sdio_driver = {
378 .name = "cw1200_wlan_sdio",
379 .id_table = cw1200_sdio_ids,
380 .probe = cw1200_sdio_probe,
381 .remove = cw1200_sdio_disconnect,
384 .pm = &cw1200_pm_ops,
389 /* Init Module function -> Called by insmod */
390 static int __init cw1200_sdio_init(void)
392 const struct cw1200_platform_data_sdio *pdata;
395 /* FIXME -- this won't support multiple devices */
396 pdata = global_plat_data;
398 if (cw1200_sdio_on(pdata)) {
403 ret = sdio_register_driver(&sdio_driver);
410 cw1200_sdio_off(pdata);
414 /* Called at Driver Unloading */
415 static void __exit cw1200_sdio_exit(void)
417 const struct cw1200_platform_data_sdio *pdata;
419 /* FIXME -- this won't support multiple devices */
420 pdata = global_plat_data;
421 sdio_unregister_driver(&sdio_driver);
422 cw1200_sdio_off(pdata);
426 module_init(cw1200_sdio_init);
427 module_exit(cw1200_sdio_exit);