[deliverable/linux.git] / drivers / net / wireless / wl12xx / wl1251_sdio.c

/*
 * wl12xx SDIO routines
 *
 * 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
 *
 * Copyright (C) 2005 Texas Instruments Incorporated
 * Copyright (C) 2008 Google Inc
 * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
 */
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/platform_device.h>
#include <linux/wl12xx.h>
#include <linux/irq.h>

#include "wl1251.h"

#ifndef SDIO_VENDOR_ID_TI
#define SDIO_VENDOR_ID_TI		0x104c
#endif

#ifndef SDIO_DEVICE_ID_TI_WL1251
#define SDIO_DEVICE_ID_TI_WL1251	0x9066
#endif

struct wl1251_sdio {
	struct sdio_func *func;
	u32 elp_val;
};

static struct wl12xx_platform_data *wl12xx_board_data;

static struct sdio_func *wl_to_func(struct wl1251 *wl)
{
	struct wl1251_sdio *wl_sdio = wl->if_priv;
	return wl_sdio->func;
}

static void wl1251_sdio_interrupt(struct sdio_func *func)
{
	struct wl1251 *wl = sdio_get_drvdata(func);

	wl1251_debug(DEBUG_IRQ, "IRQ");

	/* FIXME should be synchronous for sdio */
	ieee80211_queue_work(wl->hw, &wl->irq_work);
}

static const struct sdio_device_id wl1251_devices[] = {
	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
	{}
};
MODULE_DEVICE_TABLE(sdio, wl1251_devices);


static void wl1251_sdio_read(struct wl1251 *wl, int addr,
			     void *buf, size_t len)
{
	int ret;
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);
	ret = sdio_memcpy_fromio(func, buf, addr, len);
	if (ret)
		wl1251_error("sdio read failed (%d)", ret);
	sdio_release_host(func);
}

static void wl1251_sdio_write(struct wl1251 *wl, int addr,
			      void *buf, size_t len)
{
	int ret;
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);
	ret = sdio_memcpy_toio(func, addr, buf, len);
	if (ret)
		wl1251_error("sdio write failed (%d)", ret);
	sdio_release_host(func);
}

static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
{
	int ret = 0;
	struct wl1251_sdio *wl_sdio = wl->if_priv;
	struct sdio_func *func = wl_sdio->func;

	/*
	 * The hardware only supports RAW (read after write) access for
	 * reading, regular sdio_readb won't work here (it interprets
	 * the unused bits of CMD52 as write data even if we send read
	 * request).
	 */
	sdio_claim_host(func);
	*val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
	sdio_release_host(func);

	if (ret)
		wl1251_error("sdio_readb failed (%d)", ret);
}

static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
{
	int ret = 0;
	struct wl1251_sdio *wl_sdio = wl->if_priv;
	struct sdio_func *func = wl_sdio->func;

	sdio_claim_host(func);
	sdio_writeb(func, val, addr, &ret);
	sdio_release_host(func);

	if (ret)
		wl1251_error("sdio_writeb failed (%d)", ret);
	else
		wl_sdio->elp_val = val;
}

static void wl1251_sdio_reset(struct wl1251 *wl)
{
}

static void wl1251_sdio_enable_irq(struct wl1251 *wl)
{
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);
	sdio_claim_irq(func, wl1251_sdio_interrupt);
	sdio_release_host(func);
}

static void wl1251_sdio_disable_irq(struct wl1251 *wl)
{
	struct sdio_func *func = wl_to_func(wl);

	sdio_claim_host(func);
	sdio_release_irq(func);
	sdio_release_host(func);
}

/* Interrupts when using dedicated WLAN_IRQ pin */
static irqreturn_t wl1251_line_irq(int irq, void *cookie)
{
	struct wl1251 *wl = cookie;

	ieee80211_queue_work(wl->hw, &wl->irq_work);

	return IRQ_HANDLED;
}

static void wl1251_enable_line_irq(struct wl1251 *wl)
{
	return enable_irq(wl->irq);
}

static void wl1251_disable_line_irq(struct wl1251 *wl)
{
	return disable_irq(wl->irq);
}

static void wl1251_sdio_set_power(bool enable)
{
}

static struct wl1251_if_operations wl1251_sdio_ops = {
	.read = wl1251_sdio_read,
	.write = wl1251_sdio_write,
	.write_elp = wl1251_sdio_write_elp,
	.read_elp = wl1251_sdio_read_elp,
	.reset = wl1251_sdio_reset,
};

static int wl1251_platform_probe(struct platform_device *pdev)
{
	if (pdev->id != -1) {
		wl1251_error("can only handle single device");
		return -ENODEV;
	}

	wl12xx_board_data = pdev->dev.platform_data;
	return 0;
}

/*
 * Dummy platform_driver for passing platform_data to this driver,
 * until we have a way to pass this through SDIO subsystem or
 * some other way.
 */
static struct platform_driver wl1251_platform_driver = {
	.driver = {
		.name	= "wl1251_data",
		.owner	= THIS_MODULE,
	},
	.probe	= wl1251_platform_probe,
};

static int wl1251_sdio_probe(struct sdio_func *func,
			     const struct sdio_device_id *id)
{
	int ret;
	struct wl1251 *wl;
	struct ieee80211_hw *hw;
	struct wl1251_sdio *wl_sdio;

	hw = wl1251_alloc_hw();
	if (IS_ERR(hw))
		return PTR_ERR(hw);

	wl = hw->priv;

	wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
	if (wl_sdio == NULL) {
		ret = -ENOMEM;
		goto out_free_hw;
	}

	sdio_claim_host(func);
	ret = sdio_enable_func(func);
	if (ret)
		goto release;

	sdio_set_block_size(func, 512);
	sdio_release_host(func);

	SET_IEEE80211_DEV(hw, &func->dev);
	wl_sdio->func = func;
	wl->if_priv = wl_sdio;
	wl->if_ops = &wl1251_sdio_ops;
	wl->set_power = wl1251_sdio_set_power;

	if (wl12xx_board_data != NULL) {
		wl->set_power = wl12xx_board_data->set_power;
		wl->irq = wl12xx_board_data->irq;
		wl->use_eeprom = wl12xx_board_data->use_eeprom;
	}

	if (wl->irq) {
		ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
		if (ret < 0) {
			wl1251_error("request_irq() failed: %d", ret);
			goto disable;
		}

		set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
		disable_irq(wl->irq);

		wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
		wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;

		wl1251_info("using dedicated interrupt line");
	} else {
		wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
		wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;

		wl1251_info("using SDIO interrupt");
	}

	ret = wl1251_init_ieee80211(wl);
	if (ret)
		goto out_free_irq;

	sdio_set_drvdata(func, wl);
	return ret;

out_free_irq:
	if (wl->irq)
		free_irq(wl->irq, wl);
disable:
	sdio_claim_host(func);
	sdio_disable_func(func);
release:
	sdio_release_host(func);
	kfree(wl_sdio);
out_free_hw:
	wl1251_free_hw(wl);
	return ret;
}

static void __devexit wl1251_sdio_remove(struct sdio_func *func)
{
	struct wl1251 *wl = sdio_get_drvdata(func);
	struct wl1251_sdio *wl_sdio = wl->if_priv;

	if (wl->irq)
		free_irq(wl->irq, wl);
	kfree(wl_sdio);
	wl1251_free_hw(wl);

	sdio_claim_host(func);
	sdio_release_irq(func);
	sdio_disable_func(func);
	sdio_release_host(func);
}

static struct sdio_driver wl1251_sdio_driver = {
	.name		= "wl1251_sdio",
	.id_table	= wl1251_devices,
	.probe		= wl1251_sdio_probe,
	.remove		= __devexit_p(wl1251_sdio_remove),
};

static int __init wl1251_sdio_init(void)
{
	int err;

	err = platform_driver_register(&wl1251_platform_driver);
	if (err) {
		wl1251_error("failed to register platform driver: %d", err);
		return err;
	}

	err = sdio_register_driver(&wl1251_sdio_driver);
	if (err)
		wl1251_error("failed to register sdio driver: %d", err);
	return err;
}

static void __exit wl1251_sdio_exit(void)
{
	sdio_unregister_driver(&wl1251_sdio_driver);
	platform_driver_unregister(&wl1251_platform_driver);
	wl1251_notice("unloaded");
}

module_init(wl1251_sdio_init);
module_exit(wl1251_sdio_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
Commit	Line	Data
3ec410d7 BC	1	/*
	2	* wl12xx SDIO routines
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	16	* 02110-1301 USA
	17	*
	18	* Copyright (C) 2005 Texas Instruments Incorporated
	19	* Copyright (C) 2008 Google Inc
	20	* Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
	21	*/
	22	#include <linux/module.h>
3ec410d7	23	#include <linux/mod_devicetable.h>
3ec410d7 BC	24	#include <linux/mmc/sdio_func.h>
3ec410d7 BC	25	#include <linux/mmc/sdio_ids.h>
8c00b39f	26	#include <linux/platform_device.h>
c1f9a095	27	#include <linux/wl12xx.h>
a02a2956	28	#include <linux/irq.h>
3ec410d7 BC	29
3ec410d7 BC	30	#include "wl1251.h"
3ec410d7 BC	31
	32	#ifndef SDIO_VENDOR_ID_TI
	33	#define SDIO_VENDOR_ID_TI 0x104c
	34	#endif
	35
	36	#ifndef SDIO_DEVICE_ID_TI_WL1251
	37	#define SDIO_DEVICE_ID_TI_WL1251 0x9066
	38	#endif
	39
832c10fd GI	40	struct wl1251_sdio {
	41	struct sdio_func *func;
	42	u32 elp_val;
	43	};
	44
8c00b39f GI	45	static struct wl12xx_platform_data *wl12xx_board_data;
8c00b39f GI	46
3ec410d7 BC	47	static struct sdio_func wl_to_func(struct wl1251 wl)
3ec410d7 BC	48	{
832c10fd GI	49	struct wl1251_sdio *wl_sdio = wl->if_priv;
832c10fd GI	50	return wl_sdio->func;
3ec410d7 BC	51	}
	52
	53	static void wl1251_sdio_interrupt(struct sdio_func *func)
	54	{
b5ed9c1b BC	55	struct wl1251 *wl = sdio_get_drvdata(func);
	56
	57	wl1251_debug(DEBUG_IRQ, "IRQ");
	58
	59	/* FIXME should be synchronous for sdio */
16e711f9	60	ieee80211_queue_work(wl->hw, &wl->irq_work);
3ec410d7 BC	61	}
	62
	63	static const struct sdio_device_id wl1251_devices[] = {
	64	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
	65	{}
	66	};
	67	MODULE_DEVICE_TABLE(sdio, wl1251_devices);
	68
	69
3c9cb9c3 GI	70	static void wl1251_sdio_read(struct wl1251 *wl, int addr,
3c9cb9c3 GI	71	void *buf, size_t len)
3ec410d7 BC	72	{
	73	int ret;
	74	struct sdio_func *func = wl_to_func(wl);
	75
	76	sdio_claim_host(func);
	77	ret = sdio_memcpy_fromio(func, buf, addr, len);
	78	if (ret)
	79	wl1251_error("sdio read failed (%d)", ret);
	80	sdio_release_host(func);
	81	}
	82
3c9cb9c3 GI	83	static void wl1251_sdio_write(struct wl1251 *wl, int addr,
3c9cb9c3 GI	84	void *buf, size_t len)
3ec410d7 BC	85	{
	86	int ret;
	87	struct sdio_func *func = wl_to_func(wl);
	88
	89	sdio_claim_host(func);
	90	ret = sdio_memcpy_toio(func, addr, buf, len);
	91	if (ret)
	92	wl1251_error("sdio write failed (%d)", ret);
	93	sdio_release_host(func);
	94	}
	95
3f9e750d GI	96	static void wl1251_sdio_read_elp(struct wl1251 wl, int addr, u32 val)
	97	{
	98	int ret = 0;
832c10fd GI	99	struct wl1251_sdio *wl_sdio = wl->if_priv;
	100	struct sdio_func *func = wl_sdio->func;
	101
	102	/*
	103	* The hardware only supports RAW (read after write) access for
	104	* reading, regular sdio_readb won't work here (it interprets
	105	* the unused bits of CMD52 as write data even if we send read
	106	* request).
	107	*/
3f9e750d	108	sdio_claim_host(func);
832c10fd	109	*val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
3f9e750d GI	110	sdio_release_host(func);
	111
	112	if (ret)
	113	wl1251_error("sdio_readb failed (%d)", ret);
	114	}
	115
	116	static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
	117	{
	118	int ret = 0;
832c10fd GI	119	struct wl1251_sdio *wl_sdio = wl->if_priv;
832c10fd GI	120	struct sdio_func *func = wl_sdio->func;
3f9e750d GI	121
	122	sdio_claim_host(func);
	123	sdio_writeb(func, val, addr, &ret);
	124	sdio_release_host(func);
	125
	126	if (ret)
	127	wl1251_error("sdio_writeb failed (%d)", ret);
832c10fd GI	128	else
832c10fd GI	129	wl_sdio->elp_val = val;
3f9e750d GI	130	}
3f9e750d GI	131
3c9cb9c3	132	static void wl1251_sdio_reset(struct wl1251 *wl)
3ec410d7 BC	133	{
	134	}
	135
b5ed9c1b BC	136	static void wl1251_sdio_enable_irq(struct wl1251 *wl)
	137	{
	138	struct sdio_func *func = wl_to_func(wl);
	139
	140	sdio_claim_host(func);
	141	sdio_claim_irq(func, wl1251_sdio_interrupt);
	142	sdio_release_host(func);
	143	}
	144
	145	static void wl1251_sdio_disable_irq(struct wl1251 *wl)
	146	{
	147	struct sdio_func *func = wl_to_func(wl);
	148
	149	sdio_claim_host(func);
	150	sdio_release_irq(func);
	151	sdio_release_host(func);
	152	}
	153
a02a2956 GI	154	/* Interrupts when using dedicated WLAN_IRQ pin */
	155	static irqreturn_t wl1251_line_irq(int irq, void *cookie)
	156	{
	157	struct wl1251 *wl = cookie;
	158
	159	ieee80211_queue_work(wl->hw, &wl->irq_work);
	160
	161	return IRQ_HANDLED;
	162	}
	163
	164	static void wl1251_enable_line_irq(struct wl1251 *wl)
	165	{
	166	return enable_irq(wl->irq);
	167	}
	168
	169	static void wl1251_disable_line_irq(struct wl1251 *wl)
	170	{
	171	return disable_irq(wl->irq);
	172	}
	173
3c9cb9c3	174	static void wl1251_sdio_set_power(bool enable)
3ec410d7 BC	175	{
	176	}
	177
a02a2956	178	static struct wl1251_if_operations wl1251_sdio_ops = {
3ec410d7 BC	179	.read = wl1251_sdio_read,
3ec410d7 BC	180	.write = wl1251_sdio_write,
3f9e750d GI	181	.write_elp = wl1251_sdio_write_elp,
3f9e750d GI	182	.read_elp = wl1251_sdio_read_elp,
3ec410d7 BC	183	.reset = wl1251_sdio_reset,
	184	};
	185
8c00b39f GI	186	static int wl1251_platform_probe(struct platform_device *pdev)
	187	{
	188	if (pdev->id != -1) {
	189	wl1251_error("can only handle single device");
	190	return -ENODEV;
	191	}
	192
	193	wl12xx_board_data = pdev->dev.platform_data;
	194	return 0;
	195	}
	196
	197	/*
	198	* Dummy platform_driver for passing platform_data to this driver,
	199	* until we have a way to pass this through SDIO subsystem or
	200	* some other way.
	201	*/
	202	static struct platform_driver wl1251_platform_driver = {
	203	.driver = {
	204	.name = "wl1251_data",
	205	.owner = THIS_MODULE,
	206	},
	207	.probe = wl1251_platform_probe,
	208	};
	209
3c9cb9c3 GI	210	static int wl1251_sdio_probe(struct sdio_func *func,
3c9cb9c3 GI	211	const struct sdio_device_id *id)
3ec410d7 BC	212	{
	213	int ret;
	214	struct wl1251 *wl;
	215	struct ieee80211_hw *hw;
832c10fd	216	struct wl1251_sdio *wl_sdio;
3ec410d7 BC	217
	218	hw = wl1251_alloc_hw();
	219	if (IS_ERR(hw))
	220	return PTR_ERR(hw);
	221
	222	wl = hw->priv;
	223
832c10fd GI	224	wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
	225	if (wl_sdio == NULL) {
	226	ret = -ENOMEM;
	227	goto out_free_hw;
	228	}
	229
3ec410d7 BC	230	sdio_claim_host(func);
	231	ret = sdio_enable_func(func);
	232	if (ret)
	233	goto release;
	234
	235	sdio_set_block_size(func, 512);
a02a2956	236	sdio_release_host(func);
3ec410d7 BC	237
3ec410d7 BC	238	SET_IEEE80211_DEV(hw, &func->dev);
832c10fd GI	239	wl_sdio->func = func;
832c10fd GI	240	wl->if_priv = wl_sdio;
3ec410d7 BC	241	wl->if_ops = &wl1251_sdio_ops;
	242	wl->set_power = wl1251_sdio_set_power;
	243
8c00b39f GI	244	if (wl12xx_board_data != NULL) {
8c00b39f GI	245	wl->set_power = wl12xx_board_data->set_power;
a02a2956	246	wl->irq = wl12xx_board_data->irq;
8c00b39f GI	247	wl->use_eeprom = wl12xx_board_data->use_eeprom;
	248	}
	249
a02a2956 GI	250	if (wl->irq) {
	251	ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
	252	if (ret < 0) {
	253	wl1251_error("request_irq() failed: %d", ret);
	254	goto disable;
	255	}
	256
	257	set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
	258	disable_irq(wl->irq);
	259
	260	wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
	261	wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
	262
	263	wl1251_info("using dedicated interrupt line");
	264	} else {
	265	wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
	266	wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
	267
	268	wl1251_info("using SDIO interrupt");
	269	}
	270
3ec410d7	271	ret = wl1251_init_ieee80211(wl);
3ec410d7	272	if (ret)
a02a2956	273	goto out_free_irq;
3ec410d7	274
3ec410d7 BC	275	sdio_set_drvdata(func, wl);
	276	return ret;
	277
a02a2956 GI	278	out_free_irq:
	279	if (wl->irq)
	280	free_irq(wl->irq, wl);
3ec410d7	281	disable:
b5ed9c1b	282	sdio_claim_host(func);
3ec410d7 BC	283	sdio_disable_func(func);
	284	release:
	285	sdio_release_host(func);
832c10fd GI	286	kfree(wl_sdio);
832c10fd GI	287	out_free_hw:
aa679c36	288	wl1251_free_hw(wl);
3ec410d7 BC	289	return ret;
	290	}
	291
	292	static void __devexit wl1251_sdio_remove(struct sdio_func *func)
	293	{
	294	struct wl1251 *wl = sdio_get_drvdata(func);
832c10fd	295	struct wl1251_sdio *wl_sdio = wl->if_priv;
3ec410d7	296
a02a2956 GI	297	if (wl->irq)
a02a2956 GI	298	free_irq(wl->irq, wl);
832c10fd	299	kfree(wl_sdio);
3ec410d7 BC	300	wl1251_free_hw(wl);
	301
	302	sdio_claim_host(func);
	303	sdio_release_irq(func);
	304	sdio_disable_func(func);
	305	sdio_release_host(func);
	306	}
	307
	308	static struct sdio_driver wl1251_sdio_driver = {
	309	.name = "wl1251_sdio",
	310	.id_table = wl1251_devices,
	311	.probe = wl1251_sdio_probe,
	312	.remove = __devexit_p(wl1251_sdio_remove),
	313	};
	314
	315	static int __init wl1251_sdio_init(void)
	316	{
	317	int err;
	318
8c00b39f GI	319	err = platform_driver_register(&wl1251_platform_driver);
	320	if (err) {
	321	wl1251_error("failed to register platform driver: %d", err);
	322	return err;
	323	}
	324
3ec410d7 BC	325	err = sdio_register_driver(&wl1251_sdio_driver);
	326	if (err)
	327	wl1251_error("failed to register sdio driver: %d", err);
	328	return err;
	329	}
	330
	331	static void __exit wl1251_sdio_exit(void)
	332	{
	333	sdio_unregister_driver(&wl1251_sdio_driver);
8c00b39f	334	platform_driver_unregister(&wl1251_platform_driver);
3ec410d7 BC	335	wl1251_notice("unloaded");
	336	}
	337
	338	module_init(wl1251_sdio_init);
	339	module_exit(wl1251_sdio_exit);
	340
	341	MODULE_LICENSE("GPL");
31c726f0	342	MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");