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);
84 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
85 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
86 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
87 addr, ((u8 *)buf)[0]);
90 ret = sdio_readsb(func, buf, addr, len);
92 ret = sdio_memcpy_fromio(func, buf, addr, len);
94 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
98 sdio_release_host(func);
101 dev_err(child->parent, "sdio read failed (%d)\n", ret);
103 if (unlikely(dump)) {
104 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
105 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
106 DUMP_PREFIX_OFFSET, 16, 1,
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);
159 pm_runtime_put_noidle(&card->dev);
160 dev_err(glue->dev, "%s: failed to get_sync(%d)\n",
166 sdio_claim_host(func);
168 * To guarantee that the SDIO card is power cycled, as required to make
169 * the FW programming to succeed, let's do a brute force HW reset.
171 mmc_hw_reset(card->host);
173 sdio_enable_func(func);
174 sdio_release_host(func);
179 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 /* Let runtime PM know the card is powered off */
189 pm_runtime_put(&card->dev);
193 static int wl12xx_sdio_set_power(struct device *child, bool enable)
195 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
198 return wl12xx_sdio_power_on(glue);
200 return wl12xx_sdio_power_off(glue);
203 static struct wl1271_if_operations sdio_ops = {
204 .read = wl12xx_sdio_raw_read,
205 .write = wl12xx_sdio_raw_write,
206 .power = wl12xx_sdio_set_power,
207 .set_block_size = wl1271_sdio_set_block_size,
212 static const struct wilink_family_data wl127x_data = {
214 .nvs_name = "/*(DEBLOBBED)*/",
217 static const struct wilink_family_data wl128x_data = {
219 .nvs_name = "/*(DEBLOBBED)*/",
222 static const struct wilink_family_data wl18xx_data = {
224 .cfg_name = "/*(DEBLOBBED)*/",
225 .nvs_name = "/*(DEBLOBBED)*/",
228 static const struct of_device_id wlcore_sdio_of_match_table[] = {
229 { .compatible = "ti,wl1271", .data = &wl127x_data },
230 { .compatible = "ti,wl1273", .data = &wl127x_data },
231 { .compatible = "ti,wl1281", .data = &wl128x_data },
232 { .compatible = "ti,wl1283", .data = &wl128x_data },
233 { .compatible = "ti,wl1285", .data = &wl128x_data },
234 { .compatible = "ti,wl1801", .data = &wl18xx_data },
235 { .compatible = "ti,wl1805", .data = &wl18xx_data },
236 { .compatible = "ti,wl1807", .data = &wl18xx_data },
237 { .compatible = "ti,wl1831", .data = &wl18xx_data },
238 { .compatible = "ti,wl1835", .data = &wl18xx_data },
239 { .compatible = "ti,wl1837", .data = &wl18xx_data },
243 static int wlcore_probe_of(struct device *dev, int *irq,
244 struct wlcore_platdev_data *pdev_data)
246 struct device_node *np = dev->of_node;
247 const struct of_device_id *of_id;
249 of_id = of_match_node(wlcore_sdio_of_match_table, np);
253 pdev_data->family = of_id->data;
255 *irq = irq_of_parse_and_map(np, 0);
257 dev_err(dev, "No irq in platform data\n");
261 /* optional clock frequency params */
262 of_property_read_u32(np, "ref-clock-frequency",
263 &pdev_data->ref_clock_freq);
264 of_property_read_u32(np, "tcxo-clock-frequency",
265 &pdev_data->tcxo_clock_freq);
270 static int wlcore_probe_of(struct device *dev, int *irq,
271 struct wlcore_platdev_data *pdev_data)
277 static int wl1271_probe(struct sdio_func *func,
278 const struct sdio_device_id *id)
280 struct wlcore_platdev_data *pdev_data;
281 struct wl12xx_sdio_glue *glue;
282 struct resource res[1];
283 mmc_pm_flag_t mmcflags;
286 const char *chip_family;
288 /* We are only able to handle the wlan function */
289 if (func->num != 0x02)
292 pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL);
296 pdev_data->if_ops = &sdio_ops;
298 glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL);
302 glue->dev = &func->dev;
304 /* Grab access to FN0 for ELP reg. */
305 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
307 /* Use block mode for transferring over one block size of data */
308 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
310 ret = wlcore_probe_of(&func->dev, &irq, pdev_data);
314 /* if sdio can keep power while host is suspended, enable wow */
315 mmcflags = sdio_get_host_pm_caps(func);
316 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
318 if (mmcflags & MMC_PM_KEEP_POWER)
319 pdev_data->pwr_in_suspend = true;
321 sdio_set_drvdata(func, glue);
323 /* Tell PM core that we don't need the card to be powered now */
324 pm_runtime_put_noidle(&func->dev);
327 * Due to a hardware bug, we can't differentiate wl18xx from
328 * wl12xx, because both report the same device ID. The only
329 * way to differentiate is by checking the SDIO revision,
330 * which is 3.00 on the wl18xx chips.
332 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
333 chip_family = "wl18xx";
335 chip_family = "wl12xx";
337 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO);
339 dev_err(glue->dev, "can't allocate platform_device");
344 glue->core->dev.parent = &func->dev;
346 memset(res, 0x00, sizeof(res));
349 res[0].flags = IORESOURCE_IRQ |
350 irqd_get_trigger_type(irq_get_irq_data(irq));
353 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
355 dev_err(glue->dev, "can't add resources\n");
359 ret = platform_device_add_data(glue->core, pdev_data,
362 dev_err(glue->dev, "can't add platform data\n");
366 ret = platform_device_add(glue->core);
368 dev_err(glue->dev, "can't add platform device\n");
374 platform_device_put(glue->core);
380 static void wl1271_remove(struct sdio_func *func)
382 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
384 /* Undo decrement done above in wl1271_probe */
385 pm_runtime_get_noresume(&func->dev);
387 platform_device_unregister(glue->core);
391 static int wl1271_suspend(struct device *dev)
393 /* Tell MMC/SDIO core it's OK to power down the card
394 * (if it isn't already), but not to remove it completely */
395 struct sdio_func *func = dev_to_sdio_func(dev);
396 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
397 struct wl1271 *wl = platform_get_drvdata(glue->core);
398 mmc_pm_flag_t sdio_flags;
402 dev_err(dev, "no wilink module was probed\n");
406 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
409 /* check whether sdio should keep power */
410 if (wl->wow_enabled) {
411 sdio_flags = sdio_get_host_pm_caps(func);
413 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
414 dev_err(dev, "can't keep power while host "
420 /* keep power while host suspended */
421 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
423 dev_err(dev, "error while trying to keep power\n");
431 static int wl1271_resume(struct device *dev)
433 dev_dbg(dev, "wl1271 resume\n");
438 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
439 .suspend = wl1271_suspend,
440 .resume = wl1271_resume,
444 static struct sdio_driver wl1271_sdio_driver = {
445 .name = "wl1271_sdio",
446 .id_table = wl1271_devices,
447 .probe = wl1271_probe,
448 .remove = wl1271_remove,
451 .pm = &wl1271_sdio_pm_ops,
456 static int __init wl1271_init(void)
458 return sdio_register_driver(&wl1271_sdio_driver);
461 static void __exit wl1271_exit(void)
463 sdio_unregister_driver(&wl1271_sdio_driver);
466 module_init(wl1271_init);
467 module_exit(wl1271_exit);
469 module_param(dump, bool, 0600);
470 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
472 MODULE_LICENSE("GPL");
473 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
474 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");