[deliverable/linux.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_softc *sc, int *csz)
{
	*csz = L1_CACHE_BYTES >> 2;
}

static void ath_ahb_cleanup(struct ath_softc *sc)
{
	iounmap(sc->mem);
}

static bool ath_ahb_eeprom_read(struct ath_hw *ah, u32 off, u16 *data)
{
	struct ath_softc *sc = ah->ah_sc;
	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))) {
		DPRINTF(ah->ah_sc, 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  = {
	.read_cachesize = ath_ahb_read_cachesize,
	.cleanup = ath_ahb_cleanup,

	.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;

	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->bus_ops = &ath_ahb_bus_ops;
	sc->irq = irq;

	ret = ath_init_device(AR5416_AR9100_DEVID, sc);
	if (ret != 0) {
		dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
		ret = -ENODEV;
		goto err_free_hw;
	}

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

	ah = sc->sc_ah;
	printk(KERN_INFO
	       "%s: Atheros AR%s MAC/BB Rev:%x, "
	       "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
	       wiphy_name(hw->wiphy),
	       ath_mac_bb_name(ah->hw_version.macVersion),
	       ah->hw_version.macRev,
	       ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
	       ah->hw_version.phyRev,
	       (unsigned long)mem, irq);

	return 0;

 err_detach:
	ath_detach(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;

		ath_cleanup(sc);
		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
	24	/* return bus cachesize in 4B word units */
	25	static void ath_ahb_read_cachesize(struct ath_softc sc, int csz)
	26	{
	27	*csz = L1_CACHE_BYTES >> 2;
	28	}
	29
	30	static void ath_ahb_cleanup(struct ath_softc *sc)
	31	{
	32	iounmap(sc->mem);
	33	}
	34
cbe61d8a	35	static bool ath_ahb_eeprom_read(struct ath_hw ah, u32 off, u16 data)
9dbeb91a GJ	36	{
	37	struct ath_softc *sc = ah->ah_sc;
	38	struct platform_device *pdev = to_platform_device(sc->dev);
	39	struct ath9k_platform_data *pdata;
	40
	41	pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
	42	if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
	43	DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
	44	"%s: flash read failed, offset %08x is out of range\n",
	45	__func__, off);
	46	return false;
	47	}
	48
	49	*data = pdata->eeprom_data[off];
	50	return true;
	51	}
	52
09329d37 GJ	53	static struct ath_bus_ops ath_ahb_bus_ops = {
	54	.read_cachesize = ath_ahb_read_cachesize,
	55	.cleanup = ath_ahb_cleanup,
9dbeb91a GJ	56
9dbeb91a GJ	57	.eeprom_read = ath_ahb_eeprom_read,
09329d37 GJ	58	};
	59
	60	static int ath_ahb_probe(struct platform_device *pdev)
	61	{
	62	void __iomem *mem;
9251f0b4	63	struct ath_wiphy *aphy;
09329d37 GJ	64	struct ath_softc *sc;
	65	struct ieee80211_hw *hw;
	66	struct resource *res;
	67	int irq;
	68	int ret = 0;
cbe61d8a	69	struct ath_hw *ah;
09329d37	70
9dbeb91a GJ	71	if (!pdev->dev.platform_data) {
	72	dev_err(&pdev->dev, "no platform data specified\n");
	73	ret = -EINVAL;
	74	goto err_out;
	75	}
	76
09329d37 GJ	77	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	78	if (res == NULL) {
	79	dev_err(&pdev->dev, "no memory resource found\n");
	80	ret = -ENXIO;
	81	goto err_out;
	82	}
	83
	84	mem = ioremap_nocache(res->start, res->end - res->start + 1);
	85	if (mem == NULL) {
	86	dev_err(&pdev->dev, "ioremap failed\n");
	87	ret = -ENOMEM;
	88	goto err_out;
	89	}
	90
	91	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	92	if (res == NULL) {
	93	dev_err(&pdev->dev, "no IRQ resource found\n");
	94	ret = -ENXIO;
	95	goto err_iounmap;
	96	}
	97
	98	irq = res->start;
	99
bce048d7 JM	100	hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
bce048d7 JM	101	sizeof(struct ath_softc), &ath9k_ops);
09329d37 GJ	102	if (hw == NULL) {
	103	dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
	104	ret = -ENOMEM;
	105	goto err_iounmap;
	106	}
	107
	108	SET_IEEE80211_DEV(hw, &pdev->dev);
	109	platform_set_drvdata(pdev, hw);
	110
bce048d7 JM	111	aphy = hw->priv;
	112	sc = (struct ath_softc *) (aphy + 1);
	113	aphy->sc = sc;
	114	aphy->hw = hw;
	115	sc->pri_wiphy = aphy;
09329d37 GJ	116	sc->hw = hw;
	117	sc->dev = &pdev->dev;
	118	sc->mem = mem;
	119	sc->bus_ops = &ath_ahb_bus_ops;
	120	sc->irq = irq;
	121
1e40bcfa	122	ret = ath_init_device(AR5416_AR9100_DEVID, sc);
09329d37 GJ	123	if (ret != 0) {
	124	dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
	125	ret = -ENODEV;
	126	goto err_free_hw;
	127	}
	128
	129	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
	130	if (ret) {
	131	dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret);
	132	ret = -EIO;
	133	goto err_detach;
	134	}
	135
	136	ah = sc->sc_ah;
	137	printk(KERN_INFO
	138	"%s: Atheros AR%s MAC/BB Rev:%x, "
	139	"AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
	140	wiphy_name(hw->wiphy),
d535a42a S	141	ath_mac_bb_name(ah->hw_version.macVersion),
	142	ah->hw_version.macRev,
	143	ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
	144	ah->hw_version.phyRev,
09329d37 GJ	145	(unsigned long)mem, irq);
	146
	147	return 0;
	148
	149	err_detach:
	150	ath_detach(sc);
	151	err_free_hw:
	152	ieee80211_free_hw(hw);
	153	platform_set_drvdata(pdev, NULL);
	154	err_iounmap:
	155	iounmap(mem);
	156	err_out:
	157	return ret;
	158	}
	159
	160	static int ath_ahb_remove(struct platform_device *pdev)
	161	{
	162	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
	163
	164	if (hw) {
bce048d7 JM	165	struct ath_wiphy *aphy = hw->priv;
bce048d7 JM	166	struct ath_softc *sc = aphy->sc;
09329d37 GJ	167
	168	ath_cleanup(sc);
	169	platform_set_drvdata(pdev, NULL);
	170	}
	171
	172	return 0;
	173	}
	174
	175	static struct platform_driver ath_ahb_driver = {
	176	.probe = ath_ahb_probe,
	177	.remove = ath_ahb_remove,
	178	.driver = {
	179	.name = "ath9k",
	180	.owner = THIS_MODULE,
	181	},
	182	};
	183
	184	int ath_ahb_init(void)
	185	{
	186	return platform_driver_register(&ath_ahb_driver);
	187	}
	188
	189	void ath_ahb_exit(void)
	190	{
	191	platform_driver_unregister(&ath_ahb_driver);
	192	}