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/pm_runtime.h>
35 #include <linux/printk.h>
37 #include <linux/of_irq.h>
40 #include "wl12xx_80211.h"
43 #ifndef SDIO_VENDOR_ID_TI
44 #define SDIO_VENDOR_ID_TI 0x0097
47 #ifndef SDIO_DEVICE_ID_TI_WL1271
48 #define SDIO_DEVICE_ID_TI_WL1271 0x4076
51 static bool dump = false;
53 struct wl12xx_sdio_glue {
55 struct platform_device *core;
58 static const struct sdio_device_id wl1271_devices[] = {
59 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
62 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
64 static void wl1271_sdio_set_block_size(struct device *child,
67 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
68 struct sdio_func *func = dev_to_sdio_func(glue->dev);
70 sdio_claim_host(func);
71 sdio_set_block_size(func, blksz);
72 sdio_release_host(func);
75 static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
76 void *buf, size_t len, bool fixed)
79 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
80 struct sdio_func *func = dev_to_sdio_func(glue->dev);
82 sdio_claim_host(func);
85 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
86 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
87 DUMP_PREFIX_OFFSET, 16, 1,
91 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
92 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
93 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
94 addr, ((u8 *)buf)[0]);
97 ret = sdio_readsb(func, buf, addr, len);
99 ret = sdio_memcpy_fromio(func, buf, addr, len);
101 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
105 sdio_release_host(func);
108 dev_err(child->parent, "sdio read failed (%d)\n", ret);
113 static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
114 void *buf, size_t len, bool fixed)
117 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
118 struct sdio_func *func = dev_to_sdio_func(glue->dev);
120 sdio_claim_host(func);
122 if (unlikely(dump)) {
123 printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
124 print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
125 DUMP_PREFIX_OFFSET, 16, 1,
129 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
130 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
131 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
132 addr, ((u8 *)buf)[0]);
134 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
138 ret = sdio_writesb(func, addr, buf, len);
140 ret = sdio_memcpy_toio(func, addr, buf, len);
143 sdio_release_host(func);
146 dev_err(child->parent, "sdio write failed (%d)\n", ret);
151 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
154 struct sdio_func *func = dev_to_sdio_func(glue->dev);
155 struct mmc_card *card = func->card;
157 ret = pm_runtime_get_sync(&card->dev);
160 * Runtime PM might be temporarily disabled, or the device
161 * might have a positive reference counter. Make sure it is
164 ret = mmc_power_restore_host(card->host);
166 pm_runtime_put_sync(&card->dev);
171 sdio_claim_host(func);
172 sdio_enable_func(func);
173 sdio_release_host(func);
179 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
182 struct sdio_func *func = dev_to_sdio_func(glue->dev);
183 struct mmc_card *card = func->card;
185 sdio_claim_host(func);
186 sdio_disable_func(func);
187 sdio_release_host(func);
189 /* Power off the card manually in case it wasn't powered off above */
190 ret = mmc_power_save_host(card->host);
194 /* Let runtime PM know the card is powered off */
195 pm_runtime_put_sync(&card->dev);
201 static int wl12xx_sdio_set_power(struct device *child, bool enable)
203 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
206 return wl12xx_sdio_power_on(glue);
208 return wl12xx_sdio_power_off(glue);
211 static struct wl1271_if_operations sdio_ops = {
212 .read = wl12xx_sdio_raw_read,
213 .write = wl12xx_sdio_raw_write,
214 .power = wl12xx_sdio_set_power,
215 .set_block_size = wl1271_sdio_set_block_size,
219 static const struct of_device_id wlcore_sdio_of_match_table[] = {
220 { .compatible = "ti,wl1271" },
221 { .compatible = "ti,wl1273" },
222 { .compatible = "ti,wl1281" },
223 { .compatible = "ti,wl1283" },
224 { .compatible = "ti,wl1801" },
225 { .compatible = "ti,wl1805" },
226 { .compatible = "ti,wl1807" },
227 { .compatible = "ti,wl1831" },
228 { .compatible = "ti,wl1835" },
229 { .compatible = "ti,wl1837" },
233 static int wlcore_probe_of(struct device *dev, int *irq,
234 struct wlcore_platdev_data *pdev_data)
236 struct device_node *np = dev->of_node;
238 if (!np || !of_match_node(wlcore_sdio_of_match_table, np))
241 *irq = irq_of_parse_and_map(np, 0);
243 dev_err(dev, "No irq in platform data\n");
248 /* optional clock frequency params */
249 of_property_read_u32(np, "ref-clock-frequency",
250 &pdev_data->ref_clock_freq);
251 of_property_read_u32(np, "tcxo-clock-frequency",
252 &pdev_data->tcxo_clock_freq);
257 static int wlcore_probe_of(struct device *dev, int *irq,
258 struct wlcore_platdev_data *pdev_data)
264 static int wl1271_probe(struct sdio_func *func,
265 const struct sdio_device_id *id)
267 struct wlcore_platdev_data pdev_data;
268 struct wl12xx_sdio_glue *glue;
269 struct resource res[1];
270 mmc_pm_flag_t mmcflags;
273 const char *chip_family;
275 /* We are only able to handle the wlan function */
276 if (func->num != 0x02)
279 memset(&pdev_data, 0x00, sizeof(pdev_data));
280 pdev_data.if_ops = &sdio_ops;
282 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
284 dev_err(&func->dev, "can't allocate glue\n");
288 glue->dev = &func->dev;
290 /* Grab access to FN0 for ELP reg. */
291 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
293 /* Use block mode for transferring over one block size of data */
294 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
296 ret = wlcore_probe_of(&func->dev, &irq, &pdev_data);
300 /* if sdio can keep power while host is suspended, enable wow */
301 mmcflags = sdio_get_host_pm_caps(func);
302 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
304 if (mmcflags & MMC_PM_KEEP_POWER)
305 pdev_data.pwr_in_suspend = true;
307 sdio_set_drvdata(func, glue);
309 /* Tell PM core that we don't need the card to be powered now */
310 pm_runtime_put_noidle(&func->dev);
313 * Due to a hardware bug, we can't differentiate wl18xx from
314 * wl12xx, because both report the same device ID. The only
315 * way to differentiate is by checking the SDIO revision,
316 * which is 3.00 on the wl18xx chips.
318 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
319 chip_family = "wl18xx";
321 chip_family = "wl12xx";
323 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO);
325 dev_err(glue->dev, "can't allocate platform_device");
330 glue->core->dev.parent = &func->dev;
332 memset(res, 0x00, sizeof(res));
335 res[0].flags = IORESOURCE_IRQ |
336 irqd_get_trigger_type(irq_get_irq_data(irq));
339 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
341 dev_err(glue->dev, "can't add resources\n");
345 ret = platform_device_add_data(glue->core, &pdev_data,
348 dev_err(glue->dev, "can't add platform data\n");
352 ret = platform_device_add(glue->core);
354 dev_err(glue->dev, "can't add platform device\n");
360 platform_device_put(glue->core);
369 static void wl1271_remove(struct sdio_func *func)
371 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
373 /* Undo decrement done above in wl1271_probe */
374 pm_runtime_get_noresume(&func->dev);
376 platform_device_unregister(glue->core);
381 static int wl1271_suspend(struct device *dev)
383 /* Tell MMC/SDIO core it's OK to power down the card
384 * (if it isn't already), but not to remove it completely */
385 struct sdio_func *func = dev_to_sdio_func(dev);
386 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
387 struct wl1271 *wl = platform_get_drvdata(glue->core);
388 mmc_pm_flag_t sdio_flags;
392 dev_err(dev, "no wilink module was probed\n");
396 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
399 /* check whether sdio should keep power */
400 if (wl->wow_enabled) {
401 sdio_flags = sdio_get_host_pm_caps(func);
403 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
404 dev_err(dev, "can't keep power while host "
410 /* keep power while host suspended */
411 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
413 dev_err(dev, "error while trying to keep power\n");
421 static int wl1271_resume(struct device *dev)
423 dev_dbg(dev, "wl1271 resume\n");
428 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
429 .suspend = wl1271_suspend,
430 .resume = wl1271_resume,
434 static struct sdio_driver wl1271_sdio_driver = {
435 .name = "wl1271_sdio",
436 .id_table = wl1271_devices,
437 .probe = wl1271_probe,
438 .remove = wl1271_remove,
441 .pm = &wl1271_sdio_pm_ops,
446 static int __init wl1271_init(void)
448 return sdio_register_driver(&wl1271_sdio_driver);
451 static void __exit wl1271_exit(void)
453 sdio_unregister_driver(&wl1271_sdio_driver);
456 module_init(wl1271_init);
457 module_exit(wl1271_exit);
459 module_param(dump, bool, S_IRUSR | S_IWUSR);
460 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
462 MODULE_LICENSE("GPL");
463 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
464 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");