[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / ath / ath9k / ahb.c

/*
 * Copyright (c) 2008-2011 Atheros Communications Inc.
 * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
 * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/nl80211.h>
#include <linux/platform_device.h>
#include <linux/ath9k_platform.h>
#include <linux/module.h>
#include "ath9k.h"

static const struct platform_device_id ath9k_platform_id_table[] = {
	{
		.name = "ath9k",
		.driver_data = AR5416_AR9100_DEVID,
	},
	{
		.name = "ar933x_wmac",
		.driver_data = AR9300_DEVID_AR9330,
	},
	{
		.name = "ar934x_wmac",
		.driver_data = AR9300_DEVID_AR9340,
	},
	{
		.name = "qca955x_wmac",
		.driver_data = AR9300_DEVID_QCA955X,
	},
	{},
};

/* return bus cachesize in 4B word units */
static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
{
	*csz = L1_CACHE_BYTES >> 2;
}

static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
{
	struct ath_softc *sc = (struct ath_softc *)common->priv;
	struct platform_device *pdev = to_platform_device(sc->dev);
	struct ath9k_platform_data *pdata;

	pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
	if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
		ath_err(common,
			"%s: flash read failed, offset %08x is out of range\n",
			__func__, off);
		return false;
	}

	*data = pdata->eeprom_data[off];
	return true;
}

static struct ath_bus_ops ath_ahb_bus_ops  = {
	.ath_bus_type = ATH_AHB,
	.read_cachesize = ath_ahb_read_cachesize,
	.eeprom_read = ath_ahb_eeprom_read,
};

static int ath_ahb_probe(struct platform_device *pdev)
{
	void __iomem *mem;
	struct ath_softc *sc;
	struct ieee80211_hw *hw;
	struct resource *res;
	const struct platform_device_id *id = platform_get_device_id(pdev);
	int irq;
	int ret = 0;
	struct ath_hw *ah;
	char hw_name[64];

	if (!pdev->dev.platform_data) {
		dev_err(&pdev->dev, "no platform data specified\n");
		ret = -EINVAL;
		goto err_out;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no memory resource found\n");
		ret = -ENXIO;
		goto err_out;
	}

	mem = ioremap_nocache(res->start, resource_size(res));
	if (mem == NULL) {
		dev_err(&pdev->dev, "ioremap failed\n");
		ret = -ENOMEM;
		goto err_out;
	}

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no IRQ resource found\n");
		ret = -ENXIO;
		goto err_iounmap;
	}

	irq = res->start;

	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
	if (hw == NULL) {
		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
		ret = -ENOMEM;
		goto err_iounmap;
	}

	SET_IEEE80211_DEV(hw, &pdev->dev);
	platform_set_drvdata(pdev, hw);

	sc = hw->priv;
	sc->hw = hw;
	sc->dev = &pdev->dev;
	sc->mem = mem;
	sc->irq = irq;

	/* Will be cleared in ath9k_start() */
	set_bit(SC_OP_INVALID, &sc->sc_flags);

	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
	if (ret) {
		dev_err(&pdev->dev, "request_irq failed\n");
		goto err_free_hw;
	}

	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
	if (ret) {
		dev_err(&pdev->dev, "failed to initialize device\n");
		goto err_irq;
	}

	ah = sc->sc_ah;
	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
		   hw_name, (unsigned long)mem, irq);

	return 0;

 err_irq:
	free_irq(irq, sc);
 err_free_hw:
	ieee80211_free_hw(hw);
	platform_set_drvdata(pdev, NULL);
 err_iounmap:
	iounmap(mem);
 err_out:
	return ret;
}

static int ath_ahb_remove(struct platform_device *pdev)
{
	struct ieee80211_hw *hw = platform_get_drvdata(pdev);

	if (hw) {
		struct ath_softc *sc = hw->priv;
		void __iomem *mem = sc->mem;

		ath9k_deinit_device(sc);
		free_irq(sc->irq, sc);
		ieee80211_free_hw(sc->hw);
		iounmap(mem);
		platform_set_drvdata(pdev, NULL);
	}

	return 0;
}

static struct platform_driver ath_ahb_driver = {
	.probe      = ath_ahb_probe,
	.remove     = ath_ahb_remove,
	.driver		= {
		.name	= "ath9k",
		.owner	= THIS_MODULE,
	},
	.id_table    = ath9k_platform_id_table,
};

MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);

int ath_ahb_init(void)
{
	return platform_driver_register(&ath_ahb_driver);
}

void ath_ahb_exit(void)
{
	platform_driver_unregister(&ath_ahb_driver);
}
Commit	Line	Data
09329d37	1	/*
5b68138e	2	* Copyright (c) 2008-2011 Atheros Communications Inc.
09329d37 GJ	3	* Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
	4	* Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
	5	*
	6	* Permission to use, copy, modify, and/or distribute this software for any
	7	* purpose with or without fee is hereby granted, provided that the above
	8	* copyright notice and this permission notice appear in all copies.
	9	*
	10	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	11	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	12	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	13	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	14	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	15	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	16	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	17	*/
	18
	19	#include <linux/nl80211.h>
	20	#include <linux/platform_device.h>
9dbeb91a	21	#include <linux/ath9k_platform.h>
9d9779e7	22	#include <linux/module.h>
394cf0a1	23	#include "ath9k.h"
09329d37	24
0a6c9b1b	25	static const struct platform_device_id ath9k_platform_id_table[] = {
6f11c819 VT	26	{
	27	.name = "ath9k",
	28	.driver_data = AR5416_AR9100_DEVID,
	29	},
e9b7c591 GJ	30	{
	31	.name = "ar933x_wmac",
	32	.driver_data = AR9300_DEVID_AR9330,
	33	},
247eee0e VT	34	{
	35	.name = "ar934x_wmac",
	36	.driver_data = AR9300_DEVID_AR9340,
	37	},
9476f4d6 GJ	38	{
	39	.name = "qca955x_wmac",
	40	.driver_data = AR9300_DEVID_QCA955X,
	41	},
6f11c819 VT	42	{},
	43	};
	44
09329d37	45	/* return bus cachesize in 4B word units */
5bb12791	46	static void ath_ahb_read_cachesize(struct ath_common common, int csz)
09329d37 GJ	47	{
	48	*csz = L1_CACHE_BYTES >> 2;
	49	}
	50
5bb12791	51	static bool ath_ahb_eeprom_read(struct ath_common common, u32 off, u16 data)
9dbeb91a	52	{
e307fcf0	53	struct ath_softc sc = (struct ath_softc )common->priv;
9dbeb91a GJ	54	struct platform_device *pdev = to_platform_device(sc->dev);
	55	struct ath9k_platform_data *pdata;
	56
	57	pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
	58	if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
3800276a JP	59	ath_err(common,
	60	"%s: flash read failed, offset %08x is out of range\n",
	61	__func__, off);
9dbeb91a GJ	62	return false;
	63	}
	64
	65	*data = pdata->eeprom_data[off];
	66	return true;
	67	}
	68
09329d37	69	static struct ath_bus_ops ath_ahb_bus_ops = {
497ad9ad	70	.ath_bus_type = ATH_AHB,
09329d37	71	.read_cachesize = ath_ahb_read_cachesize,
9dbeb91a	72	.eeprom_read = ath_ahb_eeprom_read,
09329d37 GJ	73	};
	74
	75	static int ath_ahb_probe(struct platform_device *pdev)
	76	{
	77	void __iomem *mem;
	78	struct ath_softc *sc;
	79	struct ieee80211_hw *hw;
	80	struct resource *res;
6f11c819	81	const struct platform_device_id *id = platform_get_device_id(pdev);
09329d37 GJ	82	int irq;
09329d37 GJ	83	int ret = 0;
cbe61d8a	84	struct ath_hw *ah;
f934c4d9	85	char hw_name[64];
09329d37	86
9dbeb91a GJ	87	if (!pdev->dev.platform_data) {
	88	dev_err(&pdev->dev, "no platform data specified\n");
	89	ret = -EINVAL;
	90	goto err_out;
	91	}
	92
09329d37 GJ	93	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	94	if (res == NULL) {
	95	dev_err(&pdev->dev, "no memory resource found\n");
	96	ret = -ENXIO;
	97	goto err_out;
	98	}
	99
9ac47933	100	mem = ioremap_nocache(res->start, resource_size(res));
09329d37 GJ	101	if (mem == NULL) {
	102	dev_err(&pdev->dev, "ioremap failed\n");
	103	ret = -ENOMEM;
	104	goto err_out;
	105	}
	106
	107	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	108	if (res == NULL) {
	109	dev_err(&pdev->dev, "no IRQ resource found\n");
	110	ret = -ENXIO;
	111	goto err_iounmap;
	112	}
	113
	114	irq = res->start;
	115
9ac58615	116	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
09329d37 GJ	117	if (hw == NULL) {
	118	dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
	119	ret = -ENOMEM;
	120	goto err_iounmap;
	121	}
	122
	123	SET_IEEE80211_DEV(hw, &pdev->dev);
	124	platform_set_drvdata(pdev, hw);
	125
9ac58615	126	sc = hw->priv;
09329d37 GJ	127	sc->hw = hw;
	128	sc->dev = &pdev->dev;
	129	sc->mem = mem;
09329d37 GJ	130	sc->irq = irq;
09329d37 GJ	131
5e4ea1f0	132	/* Will be cleared in ath9k_start() */
781b14a3	133	set_bit(SC_OP_INVALID, &sc->sc_flags);
5e4ea1f0	134
285f2dda	135	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
580171f7	136	if (ret) {
285f2dda	137	dev_err(&pdev->dev, "request_irq failed\n");
09329d37 GJ	138	goto err_free_hw;
	139	}
	140
eb93e891	141	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
09329d37	142	if (ret) {
285f2dda S	143	dev_err(&pdev->dev, "failed to initialize device\n");
285f2dda S	144	goto err_irq;
09329d37 GJ	145	}
	146
	147	ah = sc->sc_ah;
f934c4d9	148	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
c96c31e4 JP	149	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
c96c31e4 JP	150	hw_name, (unsigned long)mem, irq);
09329d37 GJ	151
	152	return 0;
	153
285f2dda S	154	err_irq:
285f2dda S	155	free_irq(irq, sc);
09329d37 GJ	156	err_free_hw:
	157	ieee80211_free_hw(hw);
	158	platform_set_drvdata(pdev, NULL);
	159	err_iounmap:
	160	iounmap(mem);
	161	err_out:
	162	return ret;
	163	}
	164
	165	static int ath_ahb_remove(struct platform_device *pdev)
	166	{
	167	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
	168
	169	if (hw) {
9ac58615	170	struct ath_softc *sc = hw->priv;
ab5132a2	171	void __iomem *mem = sc->mem;
09329d37	172
285f2dda S	173	ath9k_deinit_device(sc);
	174	free_irq(sc->irq, sc);
	175	ieee80211_free_hw(sc->hw);
ab5132a2	176	iounmap(mem);
09329d37 GJ	177	platform_set_drvdata(pdev, NULL);
	178	}
	179
	180	return 0;
	181	}
	182
	183	static struct platform_driver ath_ahb_driver = {
	184	.probe = ath_ahb_probe,
	185	.remove = ath_ahb_remove,
	186	.driver = {
	187	.name = "ath9k",
	188	.owner = THIS_MODULE,
	189	},
6f11c819	190	.id_table = ath9k_platform_id_table,
09329d37 GJ	191	};
09329d37 GJ	192
6f11c819 VT	193	MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
6f11c819 VT	194
09329d37 GJ	195	int ath_ahb_init(void)
	196	{
	197	return platform_driver_register(&ath_ahb_driver);
	198	}
	199
	200	void ath_ahb_exit(void)
	201	{
	202	platform_driver_unregister(&ath_ahb_driver);
	203	}