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

/*
 * Copyright (c) 2008-2009 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 "ath9k.h"

/* 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_print(common, ATH_DBG_FATAL,
			  "%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_wiphy *aphy;
	struct ath_softc *sc;
	struct ieee80211_hw *hw;
	struct resource *res;
	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, res->end - res->start + 1);
	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_wiphy) +
				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);

	aphy = hw->priv;
	sc = (struct ath_softc *) (aphy + 1);
	aphy->sc = sc;
	aphy->hw = hw;
	sc->pri_wiphy = aphy;
	sc->hw = hw;
	sc->dev = &pdev->dev;
	sc->mem = mem;
	sc->irq = irq;

	/* Will be cleared in ath9k_start() */
	sc->sc_flags |= SC_OP_INVALID;

	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(AR5416_AR9100_DEVID, sc, 0x0, &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_wiphy *aphy = hw->priv;
		struct ath_softc *sc = aphy->sc;
		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,
	},
};

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	/*
cee075a2	2	* Copyright (c) 2008-2009 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>
394cf0a1	22	#include "ath9k.h"
09329d37 GJ	23
09329d37 GJ	24	/* return bus cachesize in 4B word units */
5bb12791	25	static void ath_ahb_read_cachesize(struct ath_common common, int csz)
09329d37 GJ	26	{
	27	*csz = L1_CACHE_BYTES >> 2;
	28	}
	29
5bb12791	30	static bool ath_ahb_eeprom_read(struct ath_common common, u32 off, u16 data)
9dbeb91a	31	{
e307fcf0	32	struct ath_softc sc = (struct ath_softc )common->priv;
9dbeb91a GJ	33	struct platform_device *pdev = to_platform_device(sc->dev);
	34	struct ath9k_platform_data *pdata;
	35
	36	pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
	37	if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
5bb12791	38	ath_print(common, ATH_DBG_FATAL,
c46917bb LR	39	"%s: flash read failed, offset %08x "
	40	"is out of range\n",
	41	__func__, off);
9dbeb91a GJ	42	return false;
	43	}
	44
	45	*data = pdata->eeprom_data[off];
	46	return true;
	47	}
	48
09329d37	49	static struct ath_bus_ops ath_ahb_bus_ops = {
497ad9ad	50	.ath_bus_type = ATH_AHB,
09329d37	51	.read_cachesize = ath_ahb_read_cachesize,
9dbeb91a	52	.eeprom_read = ath_ahb_eeprom_read,
09329d37 GJ	53	};
	54
	55	static int ath_ahb_probe(struct platform_device *pdev)
	56	{
	57	void __iomem *mem;
9251f0b4	58	struct ath_wiphy *aphy;
09329d37 GJ	59	struct ath_softc *sc;
	60	struct ieee80211_hw *hw;
	61	struct resource *res;
	62	int irq;
	63	int ret = 0;
cbe61d8a	64	struct ath_hw *ah;
f934c4d9	65	char hw_name[64];
09329d37	66
9dbeb91a GJ	67	if (!pdev->dev.platform_data) {
	68	dev_err(&pdev->dev, "no platform data specified\n");
	69	ret = -EINVAL;
	70	goto err_out;
	71	}
	72
09329d37 GJ	73	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	74	if (res == NULL) {
	75	dev_err(&pdev->dev, "no memory resource found\n");
	76	ret = -ENXIO;
	77	goto err_out;
	78	}
	79
	80	mem = ioremap_nocache(res->start, res->end - res->start + 1);
	81	if (mem == NULL) {
	82	dev_err(&pdev->dev, "ioremap failed\n");
	83	ret = -ENOMEM;
	84	goto err_out;
	85	}
	86
	87	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	88	if (res == NULL) {
	89	dev_err(&pdev->dev, "no IRQ resource found\n");
	90	ret = -ENXIO;
	91	goto err_iounmap;
	92	}
	93
	94	irq = res->start;
	95
bce048d7 JM	96	hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
bce048d7 JM	97	sizeof(struct ath_softc), &ath9k_ops);
09329d37 GJ	98	if (hw == NULL) {
	99	dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
	100	ret = -ENOMEM;
	101	goto err_iounmap;
	102	}
	103
	104	SET_IEEE80211_DEV(hw, &pdev->dev);
	105	platform_set_drvdata(pdev, hw);
	106
bce048d7 JM	107	aphy = hw->priv;
	108	sc = (struct ath_softc *) (aphy + 1);
	109	aphy->sc = sc;
	110	aphy->hw = hw;
	111	sc->pri_wiphy = aphy;
09329d37 GJ	112	sc->hw = hw;
	113	sc->dev = &pdev->dev;
	114	sc->mem = mem;
09329d37 GJ	115	sc->irq = irq;
09329d37 GJ	116
5e4ea1f0 S	117	/* Will be cleared in ath9k_start() */
	118	sc->sc_flags \|= SC_OP_INVALID;
	119
285f2dda	120	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
580171f7	121	if (ret) {
285f2dda	122	dev_err(&pdev->dev, "request_irq failed\n");
09329d37 GJ	123	goto err_free_hw;
	124	}
	125
285f2dda	126	ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops);
09329d37	127	if (ret) {
285f2dda S	128	dev_err(&pdev->dev, "failed to initialize device\n");
285f2dda S	129	goto err_irq;
09329d37 GJ	130	}
	131
	132	ah = sc->sc_ah;
f934c4d9	133	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
c96c31e4 JP	134	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
c96c31e4 JP	135	hw_name, (unsigned long)mem, irq);
09329d37 GJ	136
	137	return 0;
	138
285f2dda S	139	err_irq:
285f2dda S	140	free_irq(irq, sc);
09329d37 GJ	141	err_free_hw:
	142	ieee80211_free_hw(hw);
	143	platform_set_drvdata(pdev, NULL);
	144	err_iounmap:
	145	iounmap(mem);
	146	err_out:
	147	return ret;
	148	}
	149
	150	static int ath_ahb_remove(struct platform_device *pdev)
	151	{
	152	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
	153
	154	if (hw) {
bce048d7 JM	155	struct ath_wiphy *aphy = hw->priv;
bce048d7 JM	156	struct ath_softc *sc = aphy->sc;
ab5132a2	157	void __iomem *mem = sc->mem;
09329d37	158
285f2dda S	159	ath9k_deinit_device(sc);
	160	free_irq(sc->irq, sc);
	161	ieee80211_free_hw(sc->hw);
ab5132a2	162	iounmap(mem);
09329d37 GJ	163	platform_set_drvdata(pdev, NULL);
	164	}
	165
	166	return 0;
	167	}
	168
	169	static struct platform_driver ath_ahb_driver = {
	170	.probe = ath_ahb_probe,
	171	.remove = ath_ahb_remove,
	172	.driver = {
	173	.name = "ath9k",
	174	.owner = THIS_MODULE,
	175	},
	176	};
	177
	178	int ath_ahb_init(void)
	179	{
	180	return platform_driver_register(&ath_ahb_driver);
	181	}
	182
	183	void ath_ahb_exit(void)
	184	{
	185	platform_driver_unregister(&ath_ahb_driver);
	186	}