[net-next-2.6.git] / drivers / net / wireless / wl12xx / wl1271_sdio.c

/*
 * This file is part of wl1271
 *
 * Copyright (C) 2009-2010 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/irq.h>
#include <linux/module.h>
#include <linux/crc7.h>
#include <linux/vmalloc.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/card.h>
#include <linux/gpio.h>
#include <linux/wl12xx.h>
#include <linux/pm_runtime.h>

#include "wl1271.h"
#include "wl12xx_80211.h"
#include "wl1271_io.h"

#ifndef SDIO_VENDOR_ID_TI
#define SDIO_VENDOR_ID_TI		0x0097
#endif

#ifndef SDIO_DEVICE_ID_TI_WL1271
#define SDIO_DEVICE_ID_TI_WL1271	0x4076
#endif

static const struct sdio_device_id wl1271_devices[] = {
	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
	{}
};
MODULE_DEVICE_TABLE(sdio, wl1271_devices);

static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
{
	return wl->if_priv;
}

static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
{
	return &(wl_to_func(wl)->dev);
}

static irqreturn_t wl1271_irq(int irq, void *cookie)
{
	struct wl1271 *wl = cookie;
	unsigned long flags;

	wl1271_debug(DEBUG_IRQ, "IRQ");

	/* complete the ELP completion */
	spin_lock_irqsave(&wl->wl_lock, flags);
	if (wl->elp_compl) {
		complete(wl->elp_compl);
		wl->elp_compl = NULL;
	}

	if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
		ieee80211_queue_work(wl->hw, &wl->irq_work);
	set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	return IRQ_HANDLED;
}

static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
{
	disable_irq(wl->irq);
}

static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
{
	enable_irq(wl->irq);
}

static void wl1271_sdio_reset(struct wl1271 *wl)
{
}

static void wl1271_sdio_init(struct wl1271 *wl)
{
}

static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
				 size_t len, bool fixed)
{
	int ret;
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);

	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
		((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
		wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
			     addr, ((u8 *)buf)[0]);
	} else {
		if (fixed)
			ret = sdio_readsb(func, buf, addr, len);
		else
			ret = sdio_memcpy_fromio(func, buf, addr, len);

		wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
			     addr, len);
		wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
	}

	sdio_release_host(func);

	if (ret)
		wl1271_error("sdio read failed (%d)", ret);
}

static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
				  size_t len, bool fixed)
{
	int ret;
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);

	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
		sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
		wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
			     addr, ((u8 *)buf)[0]);
	} else {
		wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
			     addr, len);
		wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);

		if (fixed)
			ret = sdio_writesb(func, addr, buf, len);
		else
			ret = sdio_memcpy_toio(func, addr, buf, len);
	}

	sdio_release_host(func);

	if (ret)
		wl1271_error("sdio write failed (%d)", ret);
}

static int wl1271_sdio_power_on(struct wl1271 *wl)
{
	struct sdio_func *func = wl_to_func(wl);
	int ret;

	/* Power up the card */
	ret = pm_runtime_get_sync(&func->dev);
	if (ret < 0)
		goto out;

	sdio_claim_host(func);
	sdio_enable_func(func);
	sdio_release_host(func);

out:
	return ret;
}

static int wl1271_sdio_power_off(struct wl1271 *wl)
{
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);
	sdio_disable_func(func);
	sdio_release_host(func);

	/* Power down the card */
	return pm_runtime_put_sync(&func->dev);
}

static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
{
	if (enable)
		return wl1271_sdio_power_on(wl);
	else
		return wl1271_sdio_power_off(wl);
}

static struct wl1271_if_operations sdio_ops = {
	.read		= wl1271_sdio_raw_read,
	.write		= wl1271_sdio_raw_write,
	.reset		= wl1271_sdio_reset,
	.init		= wl1271_sdio_init,
	.power		= wl1271_sdio_set_power,
	.dev		= wl1271_sdio_wl_to_dev,
	.enable_irq	= wl1271_sdio_enable_interrupts,
	.disable_irq	= wl1271_sdio_disable_interrupts
};

static int __devinit wl1271_probe(struct sdio_func *func,
				  const struct sdio_device_id *id)
{
	struct ieee80211_hw *hw;
	const struct wl12xx_platform_data *wlan_data;
	struct wl1271 *wl;
	int ret;

	/* We are only able to handle the wlan function */
	if (func->num != 0x02)
		return -ENODEV;

	hw = wl1271_alloc_hw();
	if (IS_ERR(hw))
		return PTR_ERR(hw);

	wl = hw->priv;

	wl->if_priv = func;
	wl->if_ops = &sdio_ops;

	/* Grab access to FN0 for ELP reg. */
	func->card->quirks |= MMC_QUIRK_LENIENT_FN0;

	wlan_data = wl12xx_get_platform_data();
	if (IS_ERR(wlan_data)) {
		ret = PTR_ERR(wlan_data);
		wl1271_error("missing wlan platform data: %d", ret);
		goto out_free;
	}

	wl->irq = wlan_data->irq;
	wl->ref_clock = wlan_data->board_ref_clock;

	ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
	if (ret < 0) {
		wl1271_error("request_irq() failed: %d", ret);
		goto out_free;
	}

	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);

	disable_irq(wl->irq);

	ret = wl1271_init_ieee80211(wl);
	if (ret)
		goto out_irq;

	ret = wl1271_register_hw(wl);
	if (ret)
		goto out_irq;

	sdio_set_drvdata(func, wl);

	/* Tell PM core that we don't need the card to be powered now */
	pm_runtime_put_noidle(&func->dev);

	wl1271_notice("initialized");

	return 0;

 out_irq:
	free_irq(wl->irq, wl);


 out_free:
	wl1271_free_hw(wl);

	return ret;
}

static void __devexit wl1271_remove(struct sdio_func *func)
{
	struct wl1271 *wl = sdio_get_drvdata(func);

	/* Undo decrement done above in wl1271_probe */
	pm_runtime_get_noresume(&func->dev);

	wl1271_unregister_hw(wl);
	free_irq(wl->irq, wl);
	wl1271_free_hw(wl);
}

static int wl1271_suspend(struct device *dev)
{
	/* Tell MMC/SDIO core it's OK to power down the card
	 * (if it isn't already), but not to remove it completely */
	return 0;
}

static int wl1271_resume(struct device *dev)
{
	return 0;
}

static const struct dev_pm_ops wl1271_sdio_pm_ops = {
	.suspend	= wl1271_suspend,
	.resume		= wl1271_resume,
};

static struct sdio_driver wl1271_sdio_driver = {
	.name		= "wl1271_sdio",
	.id_table	= wl1271_devices,
	.probe		= wl1271_probe,
	.remove		= __devexit_p(wl1271_remove),
	.drv = {
		.pm = &wl1271_sdio_pm_ops,
	},
};

static int __init wl1271_init(void)
{
	int ret;

	ret = sdio_register_driver(&wl1271_sdio_driver);
	if (ret < 0) {
		wl1271_error("failed to register sdio driver: %d", ret);
		goto out;
	}

out:
	return ret;
}

static void __exit wl1271_exit(void)
{
	sdio_unregister_driver(&wl1271_sdio_driver);

	wl1271_notice("unloaded");
}

module_init(wl1271_init);
module_exit(wl1271_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
MODULE_FIRMWARE(WL1271_FW_NAME);
Commit	Line	Data
5129dffe TP	1	/*
	2	* This file is part of wl1271
	3	*
	4	* Copyright (C) 2009-2010 Nokia Corporation
	5	*
	6	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	7	*
	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.
	11	*
	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.
	16	*
	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
	20	* 02110-1301 USA
	21	*
	22	*/
	23
	24	#include <linux/irq.h>
	25	#include <linux/module.h>
	26	#include <linux/crc7.h>
	27	#include <linux/vmalloc.h>
	28	#include <linux/mmc/sdio_func.h>
	29	#include <linux/mmc/sdio_ids.h>
	30	#include <linux/mmc/card.h>
19b87173	31	#include <linux/gpio.h>
09cecc34	32	#include <linux/wl12xx.h>
00cbb3c5	33	#include <linux/pm_runtime.h>
5129dffe TP	34
	35	#include "wl1271.h"
	36	#include "wl12xx_80211.h"
	37	#include "wl1271_io.h"
	38
5129dffe TP	39	#ifndef SDIO_VENDOR_ID_TI
	40	#define SDIO_VENDOR_ID_TI 0x0097
	41	#endif
	42
	43	#ifndef SDIO_DEVICE_ID_TI_WL1271
	44	#define SDIO_DEVICE_ID_TI_WL1271 0x4076
	45	#endif
	46
	47	static const struct sdio_device_id wl1271_devices[] = {
	48	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
	49	{}
	50	};
	51	MODULE_DEVICE_TABLE(sdio, wl1271_devices);
	52
	53	static inline struct sdio_func wl_to_func(struct wl1271 wl)
	54	{
	55	return wl->if_priv;
	56	}
	57
	58	static struct device wl1271_sdio_wl_to_dev(struct wl1271 wl)
	59	{
	60	return &(wl_to_func(wl)->dev);
	61	}
	62
	63	static irqreturn_t wl1271_irq(int irq, void *cookie)
	64	{
	65	struct wl1271 *wl = cookie;
	66	unsigned long flags;
	67
	68	wl1271_debug(DEBUG_IRQ, "IRQ");
	69
	70	/* complete the ELP completion */
	71	spin_lock_irqsave(&wl->wl_lock, flags);
	72	if (wl->elp_compl) {
	73	complete(wl->elp_compl);
	74	wl->elp_compl = NULL;
	75	}
	76
1e73eb62 JO	77	if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
	78	ieee80211_queue_work(wl->hw, &wl->irq_work);
	79	set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
5129dffe TP	80	spin_unlock_irqrestore(&wl->wl_lock, flags);
	81
	82	return IRQ_HANDLED;
	83	}
	84
	85	static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
	86	{
	87	disable_irq(wl->irq);
	88	}
	89
	90	static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
	91	{
	92	enable_irq(wl->irq);
	93	}
	94
	95	static void wl1271_sdio_reset(struct wl1271 *wl)
	96	{
	97	}
	98
	99	static void wl1271_sdio_init(struct wl1271 *wl)
	100	{
	101	}
	102
	103	static void wl1271_sdio_raw_read(struct wl1271 wl, int addr, void buf,
a3b8ea75	104	size_t len, bool fixed)
5129dffe TP	105	{
	106	int ret;
	107	struct sdio_func *func = wl_to_func(wl);
	108
49063a0d OBC	109	sdio_claim_host(func);
49063a0d OBC	110
5129dffe TP	111	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
5129dffe TP	112	((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
a3b8ea75	113	wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
5129dffe TP	114	addr, ((u8 *)buf)[0]);
	115	} else {
	116	if (fixed)
	117	ret = sdio_readsb(func, buf, addr, len);
	118	else
	119	ret = sdio_memcpy_fromio(func, buf, addr, len);
	120
99e50314	121	wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
5129dffe	122	addr, len);
a3b8ea75	123	wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
5129dffe TP	124	}
5129dffe TP	125
49063a0d OBC	126	sdio_release_host(func);
49063a0d OBC	127
5129dffe TP	128	if (ret)
5129dffe TP	129	wl1271_error("sdio read failed (%d)", ret);
5129dffe TP	130	}
	131
	132	static void wl1271_sdio_raw_write(struct wl1271 wl, int addr, void buf,
a3b8ea75	133	size_t len, bool fixed)
5129dffe TP	134	{
	135	int ret;
	136	struct sdio_func *func = wl_to_func(wl);
	137
49063a0d OBC	138	sdio_claim_host(func);
49063a0d OBC	139
5129dffe TP	140	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
5129dffe TP	141	sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
a3b8ea75	142	wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
5129dffe TP	143	addr, ((u8 *)buf)[0]);
5129dffe TP	144	} else {
99e50314	145	wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
5129dffe	146	addr, len);
a3b8ea75	147	wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
5129dffe TP	148
	149	if (fixed)
	150	ret = sdio_writesb(func, addr, buf, len);
	151	else
	152	ret = sdio_memcpy_toio(func, addr, buf, len);
	153	}
49063a0d OBC	154
	155	sdio_release_host(func);
	156
5129dffe TP	157	if (ret)
5129dffe TP	158	wl1271_error("sdio write failed (%d)", ret);
49063a0d OBC	159	}
49063a0d OBC	160
2cc78ff7	161	static int wl1271_sdio_power_on(struct wl1271 *wl)
49063a0d OBC	162	{
49063a0d OBC	163	struct sdio_func *func = wl_to_func(wl);
00cbb3c5 OBC	164	int ret;
	165
	166	/* Power up the card */
	167	ret = pm_runtime_get_sync(&func->dev);
	168	if (ret < 0)
	169	goto out;
5129dffe	170
49063a0d OBC	171	sdio_claim_host(func);
	172	sdio_enable_func(func);
	173	sdio_release_host(func);
2cc78ff7	174
00cbb3c5 OBC	175	out:
00cbb3c5 OBC	176	return ret;
49063a0d OBC	177	}
49063a0d OBC	178
2cc78ff7	179	static int wl1271_sdio_power_off(struct wl1271 *wl)
49063a0d OBC	180	{
	181	struct sdio_func *func = wl_to_func(wl);
	182
	183	sdio_claim_host(func);
	184	sdio_disable_func(func);
	185	sdio_release_host(func);
2cc78ff7	186
00cbb3c5 OBC	187	/* Power down the card */
00cbb3c5 OBC	188	return pm_runtime_put_sync(&func->dev);
5129dffe TP	189	}
5129dffe TP	190
2cc78ff7	191	static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
becd551c	192	{
49063a0d	193	if (enable)
2cc78ff7	194	return wl1271_sdio_power_on(wl);
49063a0d	195	else
2cc78ff7	196	return wl1271_sdio_power_off(wl);
becd551c TP	197	}
becd551c TP	198
5129dffe TP	199	static struct wl1271_if_operations sdio_ops = {
	200	.read = wl1271_sdio_raw_read,
	201	.write = wl1271_sdio_raw_write,
	202	.reset = wl1271_sdio_reset,
	203	.init = wl1271_sdio_init,
becd551c	204	.power = wl1271_sdio_set_power,
5129dffe TP	205	.dev = wl1271_sdio_wl_to_dev,
	206	.enable_irq = wl1271_sdio_enable_interrupts,
	207	.disable_irq = wl1271_sdio_disable_interrupts
	208	};
	209
5129dffe TP	210	static int __devinit wl1271_probe(struct sdio_func *func,
	211	const struct sdio_device_id *id)
	212	{
	213	struct ieee80211_hw *hw;
09cecc34	214	const struct wl12xx_platform_data *wlan_data;
5129dffe TP	215	struct wl1271 *wl;
	216	int ret;
	217
	218	/* We are only able to handle the wlan function */
	219	if (func->num != 0x02)
	220	return -ENODEV;
	221
	222	hw = wl1271_alloc_hw();
	223	if (IS_ERR(hw))
	224	return PTR_ERR(hw);
	225
	226	wl = hw->priv;
	227
	228	wl->if_priv = func;
	229	wl->if_ops = &sdio_ops;
	230
5129dffe TP	231	/* Grab access to FN0 for ELP reg. */
	232	func->card->quirks \|= MMC_QUIRK_LENIENT_FN0;
	233
09cecc34 OBC	234	wlan_data = wl12xx_get_platform_data();
	235	if (IS_ERR(wlan_data)) {
	236	ret = PTR_ERR(wlan_data);
	237	wl1271_error("missing wlan platform data: %d", ret);
5129dffe TP	238	goto out_free;
	239	}
	240
09cecc34	241	wl->irq = wlan_data->irq;
15cea993	242	wl->ref_clock = wlan_data->board_ref_clock;
09cecc34	243
5129dffe TP	244	ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
	245	if (ret < 0) {
	246	wl1271_error("request_irq() failed: %d", ret);
	247	goto out_free;
	248	}
	249
	250	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
	251
	252	disable_irq(wl->irq);
	253
	254	ret = wl1271_init_ieee80211(wl);
	255	if (ret)
	256	goto out_irq;
	257
	258	ret = wl1271_register_hw(wl);
	259	if (ret)
	260	goto out_irq;
	261
49d7f6d8 TP	262	sdio_set_drvdata(func, wl);
49d7f6d8 TP	263
00cbb3c5 OBC	264	/* Tell PM core that we don't need the card to be powered now */
	265	pm_runtime_put_noidle(&func->dev);
	266
5129dffe TP	267	wl1271_notice("initialized");
	268
	269	return 0;
	270
5129dffe TP	271	out_irq:
	272	free_irq(wl->irq, wl);
	273
	274
	275	out_free:
3b56dd6a	276	wl1271_free_hw(wl);
5129dffe TP	277
	278	return ret;
	279	}
	280
	281	static void __devexit wl1271_remove(struct sdio_func *func)
	282	{
	283	struct wl1271 *wl = sdio_get_drvdata(func);
	284
00cbb3c5 OBC	285	/* Undo decrement done above in wl1271_probe */
	286	pm_runtime_get_noresume(&func->dev);
	287
3b56dd6a	288	wl1271_unregister_hw(wl);
4e23b11b	289	free_irq(wl->irq, wl);
801a673e	290	wl1271_free_hw(wl);
5129dffe TP	291	}
5129dffe TP	292
674f3058 OBC	293	static int wl1271_suspend(struct device *dev)
	294	{
	295	/* Tell MMC/SDIO core it's OK to power down the card
	296	* (if it isn't already), but not to remove it completely */
	297	return 0;
	298	}
	299
	300	static int wl1271_resume(struct device *dev)
	301	{
	302	return 0;
	303	}
	304
	305	static const struct dev_pm_ops wl1271_sdio_pm_ops = {
	306	.suspend = wl1271_suspend,
	307	.resume = wl1271_resume,
	308	};
	309
5129dffe	310	static struct sdio_driver wl1271_sdio_driver = {
f4b5d8d8	311	.name = "wl1271_sdio",
5129dffe TP	312	.id_table = wl1271_devices,
	313	.probe = wl1271_probe,
	314	.remove = __devexit_p(wl1271_remove),
674f3058 OBC	315	.drv = {
	316	.pm = &wl1271_sdio_pm_ops,
	317	},
5129dffe TP	318	};
	319
	320	static int __init wl1271_init(void)
	321	{
	322	int ret;
	323
	324	ret = sdio_register_driver(&wl1271_sdio_driver);
	325	if (ret < 0) {
	326	wl1271_error("failed to register sdio driver: %d", ret);
	327	goto out;
	328	}
	329
	330	out:
	331	return ret;
	332	}
	333
	334	static void __exit wl1271_exit(void)
	335	{
	336	sdio_unregister_driver(&wl1271_sdio_driver);
	337
	338	wl1271_notice("unloaded");
	339	}
	340
	341	module_init(wl1271_init);
	342	module_exit(wl1271_exit);
	343
	344	MODULE_LICENSE("GPL");
	345	MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
	346	MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
	347	MODULE_FIRMWARE(WL1271_FW_NAME);