[mirror_ubuntu-bionic-kernel.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 <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_out;
	}

	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_out;
	}

	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 = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
		reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
		__raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);

		/* Enable global WMAC swapping */
		reg = __raw_readl((void __iomem *) AR5K_AR2315_BYTESWAP);
		reg |= AR5K_AR2315_BYTESWAP_WMAC;
		__raw_writel(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
	} else {
		/* Enable WMAC DMA access (assuming 5312 or 231x*/
		/* TODO: check other platforms */
		reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
		if (to_platform_device(ah->dev)->id == 0)
			reg |= AR5K_AR5312_ENABLE_WLAN0;
		else
			reg |= AR5K_AR5312_ENABLE_WLAN1;
		__raw_writel(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))
			__set_bit(ATH_STAT_2G_DISABLED, ah->status);
	}

	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_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 = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
		reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
		__raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	} else {
		/*Stop DMA access */
		reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
		if (to_platform_device(ah->dev)->id == 0)
			reg &= ~AR5K_AR5312_ENABLE_WLAN0;
		else
			reg &= ~AR5K_AR5312_ENABLE_WLAN1;
		__raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
	}

	ath5k_deinit_ah(ah);
	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>
a0b907ee FF	22	#include <ar231x_platform.h>
	23	#include "ath5k.h"
	24	#include "debug.h"
	25	#include "base.h"
	26	#include "reg.h"
a0b907ee FF	27
	28	/* return bus cachesize in 4B word units */
	29	static void ath5k_ahb_read_cachesize(struct ath_common common, int csz)
	30	{
	31	*csz = L1_CACHE_BYTES >> 2;
	32	}
	33
fda9b7af WD	34	static bool
fda9b7af WD	35	ath5k_ahb_eeprom_read(struct ath_common common, u32 off, u16 data)
a0b907ee	36	{
e0d687bd PR	37	struct ath5k_hw *ah = common->priv;
e0d687bd PR	38	struct platform_device *pdev = to_platform_device(ah->dev);
a0b907ee FF	39	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	40	u16 eeprom, eeprom_end;
	41
	42
	43
	44	bcfg = pdev->dev.platform_data;
	45	eeprom = (u16 *) bcfg->radio;
	46	eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
	47
	48	eeprom += off;
	49	if (eeprom > eeprom_end)
fda9b7af	50	return false;
a0b907ee FF	51
a0b907ee FF	52	data = eeprom;
fda9b7af	53	return true;
a0b907ee FF	54	}
	55
	56	int ath5k_hw_read_srev(struct ath5k_hw *ah)
	57	{
e0d687bd	58	struct platform_device *pdev = to_platform_device(ah->dev);
a0b907ee FF	59	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	60	ah->ah_mac_srev = bcfg->devid;
	61	return 0;
	62	}
	63
fa9bfd61 FF	64	static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw ah, u8 mac)
fa9bfd61 FF	65	{
e0d687bd	66	struct platform_device *pdev = to_platform_device(ah->dev);
fa9bfd61 FF	67	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	68	u8 *cfg_mac;
	69
e0d687bd	70	if (to_platform_device(ah->dev)->id == 0)
fa9bfd61 FF	71	cfg_mac = bcfg->config->wlan0_mac;
	72	else
	73	cfg_mac = bcfg->config->wlan1_mac;
	74
	75	memcpy(mac, cfg_mac, ETH_ALEN);
	76	return 0;
	77	}
	78
a0b907ee FF	79	static const struct ath_bus_ops ath_ahb_bus_ops = {
	80	.ath_bus_type = ATH_AHB,
	81	.read_cachesize = ath5k_ahb_read_cachesize,
	82	.eeprom_read = ath5k_ahb_eeprom_read,
fa9bfd61	83	.eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
a0b907ee FF	84	};
	85
	86	/Initialization/
	87	static int ath_ahb_probe(struct platform_device *pdev)
	88	{
	89	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
e0d687bd	90	struct ath5k_hw *ah;
a0b907ee FF	91	struct ieee80211_hw *hw;
	92	struct resource *res;
	93	void __iomem *mem;
	94	int irq;
	95	int ret = 0;
	96	u32 reg;
	97
	98	if (!pdev->dev.platform_data) {
	99	dev_err(&pdev->dev, "no platform data specified\n");
	100	ret = -EINVAL;
	101	goto err_out;
	102	}
	103
	104	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	105	if (res == NULL) {
	106	dev_err(&pdev->dev, "no memory resource found\n");
	107	ret = -ENXIO;
	108	goto err_out;
	109	}
	110
9ac47933	111	mem = ioremap_nocache(res->start, resource_size(res));
a0b907ee FF	112	if (mem == NULL) {
	113	dev_err(&pdev->dev, "ioremap failed\n");
	114	ret = -ENOMEM;
	115	goto err_out;
	116	}
	117
	118	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	119	if (res == NULL) {
	120	dev_err(&pdev->dev, "no IRQ resource found\n");
	121	ret = -ENXIO;
	122	goto err_out;
	123	}
	124
	125	irq = res->start;
	126
e0d687bd	127	hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
a0b907ee FF	128	if (hw == NULL) {
	129	dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
	130	ret = -ENOMEM;
	131	goto err_out;
	132	}
	133
e0d687bd PR	134	ah = hw->priv;
	135	ah->hw = hw;
	136	ah->dev = &pdev->dev;
	137	ah->iobase = mem;
	138	ah->irq = irq;
	139	ah->devid = bcfg->devid;
a0b907ee FF	140
	141	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
	142	/* Enable WMAC AHB arbitration */
	143	reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	144	reg \|= AR5K_AR2315_AHB_ARB_CTL_WLAN;
	145	__raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	146
	147	/* Enable global WMAC swapping */
	148	reg = __raw_readl((void __iomem *) AR5K_AR2315_BYTESWAP);
	149	reg \|= AR5K_AR2315_BYTESWAP_WMAC;
	150	__raw_writel(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
	151	} else {
	152	/* Enable WMAC DMA access (assuming 5312 or 231x*/
	153	/* TODO: check other platforms */
	154	reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
e0d687bd	155	if (to_platform_device(ah->dev)->id == 0)
a0b907ee FF	156	reg \|= AR5K_AR5312_ENABLE_WLAN0;
	157	else
	158	reg \|= AR5K_AR5312_ENABLE_WLAN1;
	159	__raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
3a9dddea FF	160
	161	/*
	162	* On a dual-band AR5312, the multiband radio is only
	163	* used as pass-through. Disable 2 GHz support in the
	164	* driver for it
	165	*/
e0d687bd	166	if (to_platform_device(ah->dev)->id == 0 &&
e4bbf2f5 PR	167	(bcfg->config->flags & (BD_WLAN0 \| BD_WLAN1)) ==
e4bbf2f5 PR	168	(BD_WLAN1 \| BD_WLAN0))
e0d687bd	169	__set_bit(ATH_STAT_2G_DISABLED, ah->status);
a0b907ee FF	170	}
a0b907ee FF	171
bb1f3ad9	172	ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
a0b907ee FF	173	if (ret != 0) {
	174	dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
	175	ret = -ENODEV;
	176	goto err_free_hw;
	177	}
	178
	179	platform_set_drvdata(pdev, hw);
	180
	181	return 0;
	182
	183	err_free_hw:
	184	ieee80211_free_hw(hw);
	185	platform_set_drvdata(pdev, NULL);
	186	err_out:
	187	return ret;
	188	}
	189
	190	static int ath_ahb_remove(struct platform_device *pdev)
	191	{
	192	struct ar231x_board_config *bcfg = pdev->dev.platform_data;
	193	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
e0d687bd	194	struct ath5k_hw *ah;
a0b907ee FF	195	u32 reg;
	196
	197	if (!hw)
	198	return 0;
	199
e0d687bd	200	ah = hw->priv;
a0b907ee FF	201
	202	if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
	203	/* Disable WMAC AHB arbitration */
	204	reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	205	reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
	206	__raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
	207	} else {
	208	/Stop DMA access /
	209	reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
e0d687bd	210	if (to_platform_device(ah->dev)->id == 0)
a0b907ee FF	211	reg &= ~AR5K_AR5312_ENABLE_WLAN0;
	212	else
	213	reg &= ~AR5K_AR5312_ENABLE_WLAN1;
	214	__raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
	215	}
	216
bb1f3ad9	217	ath5k_deinit_ah(ah);
a0b907ee	218	platform_set_drvdata(pdev, NULL);
536e5189	219	ieee80211_free_hw(hw);
a0b907ee FF	220
	221	return 0;
	222	}
	223
	224	static struct platform_driver ath_ahb_driver = {
	225	.probe = ath_ahb_probe,
	226	.remove = ath_ahb_remove,
	227	.driver = {
	228	.name = "ar231x-wmac",
	229	.owner = THIS_MODULE,
	230	},
	231	};
	232
	233	static int __init
	234	ath5k_ahb_init(void)
	235	{
	236	return platform_driver_register(&ath_ahb_driver);
	237	}
	238
	239	static void __exit
	240	ath5k_ahb_exit(void)
	241	{
	242	platform_driver_unregister(&ath_ahb_driver);
	243	}
	244
	245	module_init(ath5k_ahb_init);
	246	module_exit(ath5k_ahb_exit);