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/gpio.h>
14 #include <linux/delay.h>
15 #include <linux/mmc/host.h>
16 #include <linux/mmc/sdio_func.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/sdio.h>
19 #include <net/mac80211.h>
23 #include <linux/platform_data/net-cw1200.h>
26 MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
27 MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SDIO driver");
28 MODULE_LICENSE("GPL");
30 #define SDIO_BLOCK_SIZE (512)
32 /* Default platform data for Sagrad modules */
33 static struct cw1200_platform_data_sdio sagrad_109x_evk_platform_data = {
36 .sdd_file = "sdd_sagrad_1091_1098.bin",
39 /* Allow platform data to be overridden */
40 static struct cw1200_platform_data_sdio *global_plat_data = &sagrad_109x_evk_platform_data;
42 void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata)
44 global_plat_data = pdata;
48 struct sdio_func *func;
49 struct cw1200_common *core;
50 const struct cw1200_platform_data_sdio *pdata;
53 #ifndef SDIO_VENDOR_ID_STE
54 #define SDIO_VENDOR_ID_STE 0x0020
57 #ifndef SDIO_DEVICE_ID_STE_CW1200
58 #define SDIO_DEVICE_ID_STE_CW1200 0x2280
61 static const struct sdio_device_id cw1200_sdio_ids[] = {
62 { SDIO_DEVICE(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200) },
63 { /* end: all zeroes */ },
66 /* hwbus_ops implemetation */
68 static int cw1200_sdio_memcpy_fromio(struct hwbus_priv *self,
72 return sdio_memcpy_fromio(self->func, dst, addr, count);
75 static int cw1200_sdio_memcpy_toio(struct hwbus_priv *self,
77 const void *src, int count)
79 return sdio_memcpy_toio(self->func, addr, (void *)src, count);
82 static void cw1200_sdio_lock(struct hwbus_priv *self)
84 sdio_claim_host(self->func);
87 static void cw1200_sdio_unlock(struct hwbus_priv *self)
89 sdio_release_host(self->func);
92 static void cw1200_sdio_irq_handler(struct sdio_func *func)
94 struct hwbus_priv *self = sdio_get_drvdata(func);
96 /* note: sdio_host already claimed here. */
98 cw1200_irq_handler(self->core);
101 static irqreturn_t cw1200_gpio_hardirq(int irq, void *dev_id)
103 return IRQ_WAKE_THREAD;
106 static irqreturn_t cw1200_gpio_irq(int irq, void *dev_id)
108 struct hwbus_priv *self = dev_id;
111 cw1200_sdio_lock(self);
112 cw1200_irq_handler(self->core);
113 cw1200_sdio_unlock(self);
120 static int cw1200_request_irq(struct hwbus_priv *self)
125 cccr = sdio_f0_readb(self->func, SDIO_CCCR_IENx, &ret);
129 /* Master interrupt enable ... */
132 /* ... for our function */
133 cccr |= BIT(self->func->num);
135 sdio_f0_writeb(self->func, cccr, SDIO_CCCR_IENx, &ret);
139 ret = enable_irq_wake(self->pdata->irq);
143 /* Request the IRQ */
144 ret = request_threaded_irq(self->pdata->irq, cw1200_gpio_hardirq,
146 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
147 "cw1200_wlan_irq", self);
157 static int cw1200_sdio_irq_subscribe(struct hwbus_priv *self)
161 pr_debug("SW IRQ subscribe\n");
162 sdio_claim_host(self->func);
163 if (self->pdata->irq)
164 ret = cw1200_request_irq(self);
166 ret = sdio_claim_irq(self->func, cw1200_sdio_irq_handler);
168 sdio_release_host(self->func);
172 static int cw1200_sdio_irq_unsubscribe(struct hwbus_priv *self)
176 pr_debug("SW IRQ unsubscribe\n");
178 if (self->pdata->irq) {
179 disable_irq_wake(self->pdata->irq);
180 free_irq(self->pdata->irq, self);
182 sdio_claim_host(self->func);
183 ret = sdio_release_irq(self->func);
184 sdio_release_host(self->func);
189 static int cw1200_sdio_off(const struct cw1200_platform_data_sdio *pdata)
192 gpio_set_value(pdata->reset, 0);
193 msleep(30); /* Min is 2 * CLK32K cycles */
194 gpio_free(pdata->reset);
197 if (pdata->power_ctrl)
198 pdata->power_ctrl(pdata, false);
200 pdata->clk_ctrl(pdata, false);
205 static int cw1200_sdio_on(const struct cw1200_platform_data_sdio *pdata)
207 /* Ensure I/Os are pulled low */
209 gpio_request(pdata->reset, "cw1200_wlan_reset");
210 gpio_direction_output(pdata->reset, 0);
212 if (pdata->powerup) {
213 gpio_request(pdata->powerup, "cw1200_wlan_powerup");
214 gpio_direction_output(pdata->powerup, 0);
216 if (pdata->reset || pdata->powerup)
217 msleep(10); /* Settle time? */
219 /* Enable 3v3 and 1v8 to hardware */
220 if (pdata->power_ctrl) {
221 if (pdata->power_ctrl(pdata, true)) {
222 pr_err("power_ctrl() failed!\n");
228 if (pdata->clk_ctrl) {
229 if (pdata->clk_ctrl(pdata, true)) {
230 pr_err("clk_ctrl() failed!\n");
233 msleep(10); /* Delay until clock is stable for 2 cycles */
236 /* Enable POWERUP signal */
237 if (pdata->powerup) {
238 gpio_set_value(pdata->powerup, 1);
239 msleep(250); /* or more..? */
241 /* Enable RSTn signal */
243 gpio_set_value(pdata->reset, 1);
244 msleep(50); /* Or more..? */
249 static size_t cw1200_sdio_align_size(struct hwbus_priv *self, size_t size)
251 if (self->pdata->no_nptb)
252 size = round_up(size, SDIO_BLOCK_SIZE);
254 size = sdio_align_size(self->func, size);
259 static int cw1200_sdio_pm(struct hwbus_priv *self, bool suspend)
263 if (self->pdata->irq)
264 ret = irq_set_irq_wake(self->pdata->irq, suspend);
268 static struct hwbus_ops cw1200_sdio_hwbus_ops = {
269 .hwbus_memcpy_fromio = cw1200_sdio_memcpy_fromio,
270 .hwbus_memcpy_toio = cw1200_sdio_memcpy_toio,
271 .lock = cw1200_sdio_lock,
272 .unlock = cw1200_sdio_unlock,
273 .align_size = cw1200_sdio_align_size,
274 .power_mgmt = cw1200_sdio_pm,
277 /* Probe Function to be called by SDIO stack when device is discovered */
278 static int cw1200_sdio_probe(struct sdio_func *func,
279 const struct sdio_device_id *id)
281 struct hwbus_priv *self;
284 pr_info("cw1200_wlan_sdio: Probe called\n");
286 /* We are only able to handle the wlan function */
287 if (func->num != 0x01)
290 self = kzalloc(sizeof(*self), GFP_KERNEL);
292 pr_err("Can't allocate SDIO hwbus_priv.\n");
296 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
298 self->pdata = global_plat_data; /* FIXME */
300 sdio_set_drvdata(func, self);
301 sdio_claim_host(func);
302 sdio_enable_func(func);
303 sdio_release_host(func);
305 status = cw1200_sdio_irq_subscribe(self);
307 status = cw1200_core_probe(&cw1200_sdio_hwbus_ops,
308 self, &func->dev, &self->core,
309 self->pdata->ref_clk,
310 self->pdata->macaddr,
311 self->pdata->sdd_file,
312 self->pdata->have_5ghz);
314 cw1200_sdio_irq_unsubscribe(self);
315 sdio_claim_host(func);
316 sdio_disable_func(func);
317 sdio_release_host(func);
318 sdio_set_drvdata(func, NULL);
325 /* Disconnect Function to be called by SDIO stack when
326 * device is disconnected
328 static void cw1200_sdio_disconnect(struct sdio_func *func)
330 struct hwbus_priv *self = sdio_get_drvdata(func);
333 cw1200_sdio_irq_unsubscribe(self);
335 cw1200_core_release(self->core);
338 sdio_claim_host(func);
339 sdio_disable_func(func);
340 sdio_release_host(func);
341 sdio_set_drvdata(func, NULL);
347 static int cw1200_sdio_suspend(struct device *dev)
350 struct sdio_func *func = dev_to_sdio_func(dev);
351 struct hwbus_priv *self = sdio_get_drvdata(func);
353 if (!cw1200_can_suspend(self->core))
356 /* Notify SDIO that CW1200 will remain powered during suspend */
357 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
359 pr_err("Error setting SDIO pm flags: %i\n", ret);
364 static int cw1200_sdio_resume(struct device *dev)
369 static const struct dev_pm_ops cw1200_pm_ops = {
370 .suspend = cw1200_sdio_suspend,
371 .resume = cw1200_sdio_resume,
375 static struct sdio_driver sdio_driver = {
376 .name = "cw1200_wlan_sdio",
377 .id_table = cw1200_sdio_ids,
378 .probe = cw1200_sdio_probe,
379 .remove = cw1200_sdio_disconnect,
382 .pm = &cw1200_pm_ops,
387 /* Init Module function -> Called by insmod */
388 static int __init cw1200_sdio_init(void)
390 const struct cw1200_platform_data_sdio *pdata;
393 /* FIXME -- this won't support multiple devices */
394 pdata = global_plat_data;
396 if (cw1200_sdio_on(pdata)) {
401 ret = sdio_register_driver(&sdio_driver);
408 cw1200_sdio_off(pdata);
412 /* Called at Driver Unloading */
413 static void __exit cw1200_sdio_exit(void)
415 const struct cw1200_platform_data_sdio *pdata;
417 /* FIXME -- this won't support multiple devices */
418 pdata = global_plat_data;
419 sdio_unregister_driver(&sdio_driver);
420 cw1200_sdio_off(pdata);
424 module_init(cw1200_sdio_init);
425 module_exit(cw1200_sdio_exit);