[linux-block.git] / drivers / net / wireless / ath / ath5k / 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/etherdevice.h>
#include <linux/export.h>
#include <ar231x_platform.h>
#include "ath5k.h"
#include "debug.h"
#include "base.h"
#include "reg.h"

/* return bus cachesize in 4B word units */
static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
{
	*csz = L1_CACHE_BYTES >> 2;
}

static bool
ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
{
	struct ath5k_hw *ah = common->priv;
	struct platform_device *pdev = to_platform_device(ah->dev);
	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	u16 *eeprom, *eeprom_end;


	bcfg = pdev->dev.platform_data;
	eeprom = (u16 *) bcfg->radio;
	eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;

	eeprom += off;
	if (eeprom > eeprom_end)
		return false;

	*data = *eeprom;
	return true;
}

int ath5k_hw_read_srev(struct ath5k_hw *ah)
{
	struct platform_device *pdev = to_platform_device(ah->dev);
	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	ah->ah_mac_srev = bcfg->devid;
	return 0;
}

static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
{
	struct platform_device *pdev = to_platform_device(ah->dev);
	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	u8 *cfg_mac;

	if (to_platform_device(ah->dev)->id == 0)
		cfg_mac = bcfg->config->wlan0_mac;
	else
		cfg_mac = bcfg->config->wlan1_mac;

	memcpy(mac, cfg_mac, ETH_ALEN);
	return 0;
}

static const struct ath_bus_ops ath_ahb_bus_ops = {
	.ath_bus_type = ATH_AHB,
	.read_cachesize = ath5k_ahb_read_cachesize,
	.eeprom_read = ath5k_ahb_eeprom_read,
	.eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
};

/*Initialization*/
static int ath_ahb_probe(struct platform_device *pdev)
{
	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	struct ath5k_hw *ah;
	struct ieee80211_hw *hw;
	struct resource *res;
	void __iomem *mem;
	int irq;
	int ret = 0;
	u32 reg;

	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 ath5k_hw), &ath5k_hw_ops);
	if (hw == NULL) {
		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
		ret = -ENOMEM;
		goto err_iounmap;
	}

	ah = hw->priv;
	ah->hw = hw;
	ah->dev = &pdev->dev;
	ah->iobase = mem;
	ah->irq = irq;
	ah->devid = bcfg->devid;

	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
		/* Enable WMAC AHB arbitration */
		reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
		reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
		iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);

		/* Enable global WMAC swapping */
		reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP);
		reg |= AR5K_AR2315_BYTESWAP_WMAC;
		iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
	} else {
		/* Enable WMAC DMA access (assuming 5312 or 231x*/
		/* TODO: check other platforms */
		reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
		if (to_platform_device(ah->dev)->id == 0)
			reg |= AR5K_AR5312_ENABLE_WLAN0;
		else
			reg |= AR5K_AR5312_ENABLE_WLAN1;
		iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);

		/*
		 * On a dual-band AR5312, the multiband radio is only
		 * used as pass-through. Disable 2 GHz support in the
		 * driver for it
		 */
		if (to_platform_device(ah->dev)->id == 0 &&
		    (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) ==
		     (BD_WLAN1 | BD_WLAN0))
			ah->ah_capabilities.cap_needs_2GHz_ovr = true;
		else
			ah->ah_capabilities.cap_needs_2GHz_ovr = false;
	}

	ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
	if (ret != 0) {
		dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
		ret = -ENODEV;
		goto err_free_hw;
	}

	platform_set_drvdata(pdev, hw);

	return 0;

 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 ar231x_board_config *bcfg = pdev->dev.platform_data;
	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
	struct ath5k_hw *ah;
	u32 reg;

	if (!hw)
		return 0;

	ah = hw->priv;

	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
		/* Disable WMAC AHB arbitration */
		reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
		reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
		iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	} else {
		/*Stop DMA access */
		reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
		if (to_platform_device(ah->dev)->id == 0)
			reg &= ~AR5K_AR5312_ENABLE_WLAN0;
		else
			reg &= ~AR5K_AR5312_ENABLE_WLAN1;
		iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
	}

	ath5k_deinit_ah(ah);
	iounmap(ah->iobase);
	platform_set_drvdata(pdev, NULL);
	ieee80211_free_hw(hw);

	return 0;
}

static struct platform_driver ath_ahb_driver = {
	.probe      = ath_ahb_probe,
	.remove     = ath_ahb_remove,
	.driver		= {
		.name	= "ar231x-wmac",
		.owner	= THIS_MODULE,
	},
};

static int __init
ath5k_ahb_init(void)
{
	return platform_driver_register(&ath_ahb_driver);
}

static void __exit
ath5k_ahb_exit(void)
{
	platform_driver_unregister(&ath_ahb_driver);
}

module_init(ath5k_ahb_init);
module_exit(ath5k_ahb_exit);
Commit	Line	Data
a0b907ee FF	1	/*
	2	* Copyright (c) 2008-2009 Atheros Communications Inc.
	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>
fa9bfd61	21	#include <linux/etherdevice.h>
32b92f4f	22	#include <linux/export.h>
a0b907ee FF	23	#include <ar231x_platform.h>
	24	#include "ath5k.h"
	25	#include "debug.h"
	26	#include "base.h"
	27	#include "reg.h"
a0b907ee FF	28
	29	/* return bus cachesize in 4B word units */
	30	static void ath5k_ahb_read_cachesize(struct ath_common common, int csz)
	31	{
	32	*csz = L1_CACHE_BYTES >> 2;
	33	}
	34
fda9b7af WD	35	static bool
fda9b7af WD	36	ath5k_ahb_eeprom_read(struct ath_common common, u32 off, u16 data)
a0b907ee	37	{
e0d687bd PR	38	struct ath5k_hw *ah = common->priv;
e0d687bd PR	39	struct platform_device *pdev = to_platform_device(ah->dev);
a0b907ee FF	40	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	41	u16 eeprom, eeprom_end;
	42
	43
	44
	45	bcfg = pdev->dev.platform_data;
	46	eeprom = (u16 *) bcfg->radio;
	47	eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
	48
	49	eeprom += off;
	50	if (eeprom > eeprom_end)
fda9b7af	51	return false;
a0b907ee FF	52
a0b907ee FF	53	data = eeprom;
fda9b7af	54	return true;
a0b907ee FF	55	}
	56
	57	int ath5k_hw_read_srev(struct ath5k_hw *ah)
	58	{
e0d687bd	59	struct platform_device *pdev = to_platform_device(ah->dev);
a0b907ee FF	60	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	61	ah->ah_mac_srev = bcfg->devid;
	62	return 0;
	63	}
	64
fa9bfd61 FF	65	static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw ah, u8 mac)
fa9bfd61 FF	66	{
e0d687bd	67	struct platform_device *pdev = to_platform_device(ah->dev);
fa9bfd61 FF	68	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	69	u8 *cfg_mac;
	70
e0d687bd	71	if (to_platform_device(ah->dev)->id == 0)
fa9bfd61 FF	72	cfg_mac = bcfg->config->wlan0_mac;
	73	else
	74	cfg_mac = bcfg->config->wlan1_mac;
	75
	76	memcpy(mac, cfg_mac, ETH_ALEN);
	77	return 0;
	78	}
	79
a0b907ee FF	80	static const struct ath_bus_ops ath_ahb_bus_ops = {
	81	.ath_bus_type = ATH_AHB,
	82	.read_cachesize = ath5k_ahb_read_cachesize,
	83	.eeprom_read = ath5k_ahb_eeprom_read,
fa9bfd61	84	.eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
a0b907ee FF	85	};
	86
	87	/Initialization/
	88	static int ath_ahb_probe(struct platform_device *pdev)
	89	{
	90	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
e0d687bd	91	struct ath5k_hw *ah;
a0b907ee FF	92	struct ieee80211_hw *hw;
	93	struct resource *res;
	94	void __iomem *mem;
	95	int irq;
	96	int ret = 0;
	97	u32 reg;
	98
	99	if (!pdev->dev.platform_data) {
	100	dev_err(&pdev->dev, "no platform data specified\n");
	101	ret = -EINVAL;
	102	goto err_out;
	103	}
	104
	105	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	106	if (res == NULL) {
	107	dev_err(&pdev->dev, "no memory resource found\n");
	108	ret = -ENXIO;
	109	goto err_out;
	110	}
	111
9ac47933	112	mem = ioremap_nocache(res->start, resource_size(res));
a0b907ee FF	113	if (mem == NULL) {
	114	dev_err(&pdev->dev, "ioremap failed\n");
	115	ret = -ENOMEM;
	116	goto err_out;
	117	}
	118
	119	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	120	if (res == NULL) {
	121	dev_err(&pdev->dev, "no IRQ resource found\n");
	122	ret = -ENXIO;
2db0d2ba	123	goto err_iounmap;
a0b907ee FF	124	}
	125
	126	irq = res->start;
	127
e0d687bd	128	hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
a0b907ee FF	129	if (hw == NULL) {
	130	dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
	131	ret = -ENOMEM;
2db0d2ba	132	goto err_iounmap;
a0b907ee FF	133	}
a0b907ee FF	134
e0d687bd PR	135	ah = hw->priv;
	136	ah->hw = hw;
	137	ah->dev = &pdev->dev;
	138	ah->iobase = mem;
	139	ah->irq = irq;
	140	ah->devid = bcfg->devid;
a0b907ee FF	141
	142	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
	143	/* Enable WMAC AHB arbitration */
cede8b64	144	reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
a0b907ee	145	reg \|= AR5K_AR2315_AHB_ARB_CTL_WLAN;
cede8b64	146	iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
a0b907ee FF	147
a0b907ee FF	148	/* Enable global WMAC swapping */
cede8b64	149	reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP);
a0b907ee	150	reg \|= AR5K_AR2315_BYTESWAP_WMAC;
cede8b64	151	iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
a0b907ee FF	152	} else {
	153	/* Enable WMAC DMA access (assuming 5312 or 231x*/
	154	/* TODO: check other platforms */
cede8b64	155	reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
e0d687bd	156	if (to_platform_device(ah->dev)->id == 0)
a0b907ee FF	157	reg \|= AR5K_AR5312_ENABLE_WLAN0;
	158	else
	159	reg \|= AR5K_AR5312_ENABLE_WLAN1;
cede8b64	160	iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
3a9dddea FF	161
	162	/*
	163	* On a dual-band AR5312, the multiband radio is only
	164	* used as pass-through. Disable 2 GHz support in the
	165	* driver for it
	166	*/
e0d687bd	167	if (to_platform_device(ah->dev)->id == 0 &&
e4bbf2f5 PR	168	(bcfg->config->flags & (BD_WLAN0 \| BD_WLAN1)) ==
e4bbf2f5 PR	169	(BD_WLAN1 \| BD_WLAN0))
86f62d9b NK	170	ah->ah_capabilities.cap_needs_2GHz_ovr = true;
	171	else
	172	ah->ah_capabilities.cap_needs_2GHz_ovr = false;
a0b907ee FF	173	}
a0b907ee FF	174
bb1f3ad9	175	ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
a0b907ee FF	176	if (ret != 0) {
	177	dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
	178	ret = -ENODEV;
	179	goto err_free_hw;
	180	}
	181
	182	platform_set_drvdata(pdev, hw);
	183
	184	return 0;
	185
	186	err_free_hw:
	187	ieee80211_free_hw(hw);
	188	platform_set_drvdata(pdev, NULL);
2db0d2ba JB	189	err_iounmap:
2db0d2ba JB	190	iounmap(mem);
a0b907ee FF	191	err_out:
	192	return ret;
	193	}
	194
	195	static int ath_ahb_remove(struct platform_device *pdev)
	196	{
	197	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	198	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
e0d687bd	199	struct ath5k_hw *ah;
a0b907ee FF	200	u32 reg;
	201
	202	if (!hw)
	203	return 0;
	204
e0d687bd	205	ah = hw->priv;
a0b907ee FF	206
	207	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
	208	/* Disable WMAC AHB arbitration */
cede8b64	209	reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
a0b907ee	210	reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
cede8b64	211	iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
a0b907ee FF	212	} else {
a0b907ee FF	213	/Stop DMA access /
cede8b64	214	reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
e0d687bd	215	if (to_platform_device(ah->dev)->id == 0)
a0b907ee FF	216	reg &= ~AR5K_AR5312_ENABLE_WLAN0;
	217	else
	218	reg &= ~AR5K_AR5312_ENABLE_WLAN1;
cede8b64	219	iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
a0b907ee FF	220	}
a0b907ee FF	221
bb1f3ad9	222	ath5k_deinit_ah(ah);
3708dc24	223	iounmap(ah->iobase);
a0b907ee	224	platform_set_drvdata(pdev, NULL);
536e5189	225	ieee80211_free_hw(hw);
a0b907ee FF	226
	227	return 0;
	228	}
	229
	230	static struct platform_driver ath_ahb_driver = {
	231	.probe = ath_ahb_probe,
	232	.remove = ath_ahb_remove,
	233	.driver = {
	234	.name = "ar231x-wmac",
	235	.owner = THIS_MODULE,
	236	},
	237	};
	238
	239	static int __init
	240	ath5k_ahb_init(void)
	241	{
	242	return platform_driver_register(&ath_ahb_driver);
	243	}
	244
	245	static void __exit
	246	ath5k_ahb_exit(void)
	247	{
	248	platform_driver_unregister(&ath_ahb_driver);
	249	}
	250
	251	module_init(ath5k_ahb_init);
	252	module_exit(ath5k_ahb_exit);