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.h>
29 #include <linux/mmc/sdio_func.h>
30 #include <linux/mmc/sdio_ids.h>
31 #include <linux/mmc/card.h>
32 #include <linux/mmc/host.h>
33 #include <linux/gpio.h>
34 #include <linux/wl12xx.h>
35 #include <linux/pm_runtime.h>
36 #include <linux/printk.h>
39 #include "wl12xx_80211.h"
42 #ifndef SDIO_VENDOR_ID_TI
43 #define SDIO_VENDOR_ID_TI 0x0097
46 #ifndef SDIO_DEVICE_ID_TI_WL1271
47 #define SDIO_DEVICE_ID_TI_WL1271 0x4076
50 static bool dump = false;
52 struct wl12xx_sdio_glue {
54 struct platform_device *core;
57 static const struct sdio_device_id wl1271_devices[] = {
58 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
61 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
63 static void wl1271_sdio_set_block_size(struct device *child,
66 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
67 struct sdio_func *func = dev_to_sdio_func(glue->dev);
69 sdio_claim_host(func);
70 sdio_set_block_size(func, blksz);
71 sdio_release_host(func);
74 static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
75 void *buf, size_t len, bool fixed)
78 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
79 struct sdio_func *func = dev_to_sdio_func(glue->dev);
81 sdio_claim_host(func);
84 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
85 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
86 DUMP_PREFIX_OFFSET, 16, 1,
90 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
91 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
92 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
93 addr, ((u8 *)buf)[0]);
96 ret = sdio_readsb(func, buf, addr, len);
98 ret = sdio_memcpy_fromio(func, buf, addr, len);
100 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
104 sdio_release_host(func);
107 dev_err(child->parent, "sdio read failed (%d)\n", ret);
112 static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
113 void *buf, size_t len, bool fixed)
116 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
117 struct sdio_func *func = dev_to_sdio_func(glue->dev);
119 sdio_claim_host(func);
121 if (unlikely(dump)) {
122 printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
123 print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
124 DUMP_PREFIX_OFFSET, 16, 1,
128 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
129 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
130 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
131 addr, ((u8 *)buf)[0]);
133 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
137 ret = sdio_writesb(func, addr, buf, len);
139 ret = sdio_memcpy_toio(func, addr, buf, len);
142 sdio_release_host(func);
145 dev_err(child->parent, "sdio write failed (%d)\n", ret);
150 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
153 struct sdio_func *func = dev_to_sdio_func(glue->dev);
154 struct mmc_card *card = func->card;
156 ret = pm_runtime_get_sync(&card->dev);
159 * Runtime PM might be temporarily disabled, or the device
160 * might have a positive reference counter. Make sure it is
163 ret = mmc_power_restore_host(card->host);
165 pm_runtime_put_sync(&card->dev);
170 sdio_claim_host(func);
171 sdio_enable_func(func);
172 sdio_release_host(func);
178 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
181 struct sdio_func *func = dev_to_sdio_func(glue->dev);
182 struct mmc_card *card = func->card;
184 sdio_claim_host(func);
185 sdio_disable_func(func);
186 sdio_release_host(func);
188 /* Power off the card manually in case it wasn't powered off above */
189 ret = mmc_power_save_host(card->host);
193 /* Let runtime PM know the card is powered off */
194 pm_runtime_put_sync(&card->dev);
200 static int wl12xx_sdio_set_power(struct device *child, bool enable)
202 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
205 return wl12xx_sdio_power_on(glue);
207 return wl12xx_sdio_power_off(glue);
210 static struct wl1271_if_operations sdio_ops = {
211 .read = wl12xx_sdio_raw_read,
212 .write = wl12xx_sdio_raw_write,
213 .power = wl12xx_sdio_set_power,
214 .set_block_size = wl1271_sdio_set_block_size,
217 static int wl1271_probe(struct sdio_func *func,
218 const struct sdio_device_id *id)
220 struct wlcore_platdev_data *pdev_data;
221 struct wl12xx_sdio_glue *glue;
222 struct resource res[1];
223 mmc_pm_flag_t mmcflags;
225 const char *chip_family;
227 /* We are only able to handle the wlan function */
228 if (func->num != 0x02)
231 pdev_data = kzalloc(sizeof(*pdev_data), GFP_KERNEL);
233 dev_err(&func->dev, "can't allocate platdev_data\n");
237 pdev_data->if_ops = &sdio_ops;
239 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
241 dev_err(&func->dev, "can't allocate glue\n");
242 goto out_free_pdev_data;
245 glue->dev = &func->dev;
247 /* Grab access to FN0 for ELP reg. */
248 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
250 /* Use block mode for transferring over one block size of data */
251 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
253 pdev_data->pdata = wl12xx_get_platform_data();
254 if (IS_ERR(pdev_data->pdata)) {
255 ret = PTR_ERR(pdev_data->pdata);
256 dev_err(glue->dev, "missing wlan platform data: %d\n", ret);
260 /* if sdio can keep power while host is suspended, enable wow */
261 mmcflags = sdio_get_host_pm_caps(func);
262 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
264 if (mmcflags & MMC_PM_KEEP_POWER)
265 pdev_data->pdata->pwr_in_suspend = true;
267 sdio_set_drvdata(func, glue);
269 /* Tell PM core that we don't need the card to be powered now */
270 pm_runtime_put_noidle(&func->dev);
273 * Due to a hardware bug, we can't differentiate wl18xx from
274 * wl12xx, because both report the same device ID. The only
275 * way to differentiate is by checking the SDIO revision,
276 * which is 3.00 on the wl18xx chips.
278 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
279 chip_family = "wl18xx";
281 chip_family = "wl12xx";
283 glue->core = platform_device_alloc(chip_family, -1);
285 dev_err(glue->dev, "can't allocate platform_device");
290 glue->core->dev.parent = &func->dev;
292 memset(res, 0x00, sizeof(res));
294 res[0].start = pdev_data->pdata->irq;
295 res[0].flags = IORESOURCE_IRQ;
298 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
300 dev_err(glue->dev, "can't add resources\n");
304 ret = platform_device_add_data(glue->core, pdev_data,
307 dev_err(glue->dev, "can't add platform data\n");
311 ret = platform_device_add(glue->core);
313 dev_err(glue->dev, "can't add platform device\n");
319 platform_device_put(glue->core);
331 static void wl1271_remove(struct sdio_func *func)
333 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
335 /* Undo decrement done above in wl1271_probe */
336 pm_runtime_get_noresume(&func->dev);
338 platform_device_unregister(glue->core);
343 static int wl1271_suspend(struct device *dev)
345 /* Tell MMC/SDIO core it's OK to power down the card
346 * (if it isn't already), but not to remove it completely */
347 struct sdio_func *func = dev_to_sdio_func(dev);
348 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
349 struct wl1271 *wl = platform_get_drvdata(glue->core);
350 mmc_pm_flag_t sdio_flags;
353 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
356 /* check whether sdio should keep power */
357 if (wl->wow_enabled) {
358 sdio_flags = sdio_get_host_pm_caps(func);
360 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
361 dev_err(dev, "can't keep power while host "
367 /* keep power while host suspended */
368 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
370 dev_err(dev, "error while trying to keep power\n");
378 static int wl1271_resume(struct device *dev)
380 dev_dbg(dev, "wl1271 resume\n");
385 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
386 .suspend = wl1271_suspend,
387 .resume = wl1271_resume,
391 static struct sdio_driver wl1271_sdio_driver = {
392 .name = "wl1271_sdio",
393 .id_table = wl1271_devices,
394 .probe = wl1271_probe,
395 .remove = wl1271_remove,
398 .pm = &wl1271_sdio_pm_ops,
403 static int __init wl1271_init(void)
405 return sdio_register_driver(&wl1271_sdio_driver);
408 static void __exit wl1271_exit(void)
410 sdio_unregister_driver(&wl1271_sdio_driver);
413 module_init(wl1271_init);
414 module_exit(wl1271_exit);
416 module_param(dump, bool, S_IRUSR | S_IWUSR);
417 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
419 MODULE_LICENSE("GPL");
420 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
421 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");