2 * This file is part of wl1271
4 * Copyright (C) 2009-2010 Nokia Corporation
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/irq.h>
25 #include <linux/module.h>
26 #include <linux/vmalloc.h>
27 #include <linux/platform_device.h>
28 #include <linux/mmc/sdio_func.h>
29 #include <linux/mmc/sdio_ids.h>
30 #include <linux/mmc/card.h>
31 #include <linux/mmc/host.h>
32 #include <linux/gpio.h>
33 #include <linux/wl12xx.h>
34 #include <linux/pm_runtime.h>
37 #include "wl12xx_80211.h"
40 #ifndef SDIO_VENDOR_ID_TI
41 #define SDIO_VENDOR_ID_TI 0x0097
44 #ifndef SDIO_DEVICE_ID_TI_WL1271
45 #define SDIO_DEVICE_ID_TI_WL1271 0x4076
48 struct wl12xx_sdio_glue {
50 struct platform_device *core;
53 static const struct sdio_device_id wl1271_devices[] __devinitconst = {
54 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
57 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
59 static void wl1271_sdio_set_block_size(struct device *child,
62 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
63 struct sdio_func *func = dev_to_sdio_func(glue->dev);
65 sdio_claim_host(func);
66 sdio_set_block_size(func, blksz);
67 sdio_release_host(func);
70 static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
71 size_t len, bool fixed)
74 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
75 struct sdio_func *func = dev_to_sdio_func(glue->dev);
77 sdio_claim_host(func);
79 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
80 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
81 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
82 addr, ((u8 *)buf)[0]);
85 ret = sdio_readsb(func, buf, addr, len);
87 ret = sdio_memcpy_fromio(func, buf, addr, len);
89 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
93 sdio_release_host(func);
96 dev_err(child->parent, "sdio read failed (%d)\n", ret);
99 static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
100 size_t len, bool fixed)
103 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
104 struct sdio_func *func = dev_to_sdio_func(glue->dev);
106 sdio_claim_host(func);
108 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
109 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
110 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
111 addr, ((u8 *)buf)[0]);
113 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
117 ret = sdio_writesb(func, addr, buf, len);
119 ret = sdio_memcpy_toio(func, addr, buf, len);
122 sdio_release_host(func);
125 dev_err(child->parent, "sdio write failed (%d)\n", ret);
128 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
131 struct sdio_func *func = dev_to_sdio_func(glue->dev);
133 /* If enabled, tell runtime PM not to power off the card */
134 if (pm_runtime_enabled(&func->dev)) {
135 ret = pm_runtime_get_sync(&func->dev);
139 /* Runtime PM is disabled: power up the card manually */
140 ret = mmc_power_restore_host(func->card->host);
145 sdio_claim_host(func);
146 sdio_enable_func(func);
147 sdio_release_host(func);
153 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
156 struct sdio_func *func = dev_to_sdio_func(glue->dev);
158 sdio_claim_host(func);
159 sdio_disable_func(func);
160 sdio_release_host(func);
162 /* Power off the card manually, even if runtime PM is enabled. */
163 ret = mmc_power_save_host(func->card->host);
167 /* If enabled, let runtime PM know the card is powered off */
168 if (pm_runtime_enabled(&func->dev))
169 ret = pm_runtime_put_sync(&func->dev);
174 static int wl12xx_sdio_set_power(struct device *child, bool enable)
176 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
179 return wl12xx_sdio_power_on(glue);
181 return wl12xx_sdio_power_off(glue);
184 static struct wl1271_if_operations sdio_ops = {
185 .read = wl12xx_sdio_raw_read,
186 .write = wl12xx_sdio_raw_write,
187 .power = wl12xx_sdio_set_power,
188 .set_block_size = wl1271_sdio_set_block_size,
191 static int __devinit wl1271_probe(struct sdio_func *func,
192 const struct sdio_device_id *id)
194 struct wl12xx_platform_data *wlan_data;
195 struct wl12xx_sdio_glue *glue;
196 struct resource res[1];
197 mmc_pm_flag_t mmcflags;
200 /* We are only able to handle the wlan function */
201 if (func->num != 0x02)
204 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
206 dev_err(&func->dev, "can't allocate glue\n");
210 glue->dev = &func->dev;
212 /* Grab access to FN0 for ELP reg. */
213 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
215 /* Use block mode for transferring over one block size of data */
216 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
218 wlan_data = wl12xx_get_platform_data();
219 if (IS_ERR(wlan_data)) {
220 ret = PTR_ERR(wlan_data);
221 dev_err(glue->dev, "missing wlan platform data: %d\n", ret);
225 /* if sdio can keep power while host is suspended, enable wow */
226 mmcflags = sdio_get_host_pm_caps(func);
227 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
229 if (mmcflags & MMC_PM_KEEP_POWER)
230 wlan_data->pwr_in_suspend = true;
232 wlan_data->ops = &sdio_ops;
234 sdio_set_drvdata(func, glue);
236 /* Tell PM core that we don't need the card to be powered now */
237 pm_runtime_put_noidle(&func->dev);
239 glue->core = platform_device_alloc("wl12xx", -1);
241 dev_err(glue->dev, "can't allocate platform_device");
246 glue->core->dev.parent = &func->dev;
248 memset(res, 0x00, sizeof(res));
250 res[0].start = wlan_data->irq;
251 res[0].flags = IORESOURCE_IRQ;
254 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
256 dev_err(glue->dev, "can't add resources\n");
260 ret = platform_device_add_data(glue->core, wlan_data,
263 dev_err(glue->dev, "can't add platform data\n");
267 ret = platform_device_add(glue->core);
269 dev_err(glue->dev, "can't add platform device\n");
275 platform_device_put(glue->core);
284 static void __devexit wl1271_remove(struct sdio_func *func)
286 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
288 /* Undo decrement done above in wl1271_probe */
289 pm_runtime_get_noresume(&func->dev);
291 platform_device_del(glue->core);
292 platform_device_put(glue->core);
297 static int wl1271_suspend(struct device *dev)
299 /* Tell MMC/SDIO core it's OK to power down the card
300 * (if it isn't already), but not to remove it completely */
301 struct sdio_func *func = dev_to_sdio_func(dev);
302 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
303 struct wl1271 *wl = platform_get_drvdata(glue->core);
304 mmc_pm_flag_t sdio_flags;
307 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
310 /* check whether sdio should keep power */
311 if (wl->wow_enabled) {
312 sdio_flags = sdio_get_host_pm_caps(func);
314 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
315 dev_err(dev, "can't keep power while host "
321 /* keep power while host suspended */
322 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
324 dev_err(dev, "error while trying to keep power\n");
332 static int wl1271_resume(struct device *dev)
334 dev_dbg(dev, "wl1271 resume\n");
339 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
340 .suspend = wl1271_suspend,
341 .resume = wl1271_resume,
345 static struct sdio_driver wl1271_sdio_driver = {
346 .name = "wl1271_sdio",
347 .id_table = wl1271_devices,
348 .probe = wl1271_probe,
349 .remove = __devexit_p(wl1271_remove),
352 .pm = &wl1271_sdio_pm_ops,
357 static int __init wl1271_init(void)
359 return sdio_register_driver(&wl1271_sdio_driver);
362 static void __exit wl1271_exit(void)
364 sdio_unregister_driver(&wl1271_sdio_driver);
367 module_init(wl1271_init);
368 module_exit(wl1271_exit);
370 MODULE_LICENSE("GPL");
371 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
372 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
373 MODULE_FIRMWARE(WL127X_FW_NAME_SINGLE);
374 MODULE_FIRMWARE(WL127X_FW_NAME_MULTI);
375 MODULE_FIRMWARE(WL127X_PLT_FW_NAME);
376 MODULE_FIRMWARE(WL128X_FW_NAME_SINGLE);
377 MODULE_FIRMWARE(WL128X_FW_NAME_MULTI);
378 MODULE_FIRMWARE(WL128X_PLT_FW_NAME);