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/*
* Atheros AR9XXX SoCs built-in WMAC device support
*
* Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Parts of this file are based on Atheros 2.6.15/2.6.31 BSP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/ath9k_platform.h>
#include <asm/mach-ar71xx/ar71xx.h>
#include "dev-ar9xxx-wmac.h"
#define MHZ_25 (25 * 1000 * 1000)
static struct ath9k_platform_data ar9xxx_wmac_data = {
.led_pin = -1,
};
static char ar9xxx_wmac_mac[6];
static struct resource ar9xxx_wmac_resources[] = {
{
/* .start and .end fields are filled dynamically */
.flags = IORESOURCE_MEM,
}, {
.start = AR71XX_CPU_IRQ_IP2,
.end = AR71XX_CPU_IRQ_IP2,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device ar9xxx_wmac_device = {
.name = "ath9k",
.id = -1,
.resource = ar9xxx_wmac_resources,
.num_resources = ARRAY_SIZE(ar9xxx_wmac_resources),
.dev = {
.platform_data = &ar9xxx_wmac_data,
},
};
static void ar913x_wmac_init(void)
{
ar71xx_device_stop(RESET_MODULE_AMBA2WMAC);
mdelay(10);
ar71xx_device_start(RESET_MODULE_AMBA2WMAC);
mdelay(10);
ar9xxx_wmac_resources[0].start = AR91XX_WMAC_BASE;
ar9xxx_wmac_resources[0].end = AR91XX_WMAC_BASE + AR91XX_WMAC_SIZE - 1;
}
static int ar933x_r1_get_wmac_revision(void)
{
return ar71xx_soc_rev;
}
static int ar933x_wmac_reset(void)
{
unsigned retries = 0;
ar71xx_device_stop(AR933X_RESET_WMAC);
ar71xx_device_start(AR933X_RESET_WMAC);
while (1) {
u32 bootstrap;
bootstrap = ar71xx_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
if ((bootstrap & AR933X_BOOTSTRAP_EEPBUSY) == 0)
return 0;
if (retries > 20)
break;
udelay(10000);
retries++;
}
pr_err("ar93xx: WMAC reset timed out");
return -ETIMEDOUT;
}
static void ar933x_wmac_init(void)
{
ar9xxx_wmac_device.name = "ar933x_wmac";
ar9xxx_wmac_resources[0].start = AR933X_WMAC_BASE;
ar9xxx_wmac_resources[0].end = AR933X_WMAC_BASE + AR933X_WMAC_SIZE - 1;
if (ar71xx_ref_freq == MHZ_25)
ar9xxx_wmac_data.is_clk_25mhz = true;
if (ar71xx_soc_rev == 1)
ar9xxx_wmac_data.get_mac_revision = ar933x_r1_get_wmac_revision;
ar9xxx_wmac_data.external_reset = ar933x_wmac_reset;
ar933x_wmac_reset();
}
static void ar934x_wmac_init(void)
{
ar9xxx_wmac_device.name = "ar934x_wmac";
ar9xxx_wmac_resources[0].start = AR934X_WMAC_BASE;
ar9xxx_wmac_resources[0].end = AR934X_WMAC_BASE + AR934X_WMAC_SIZE - 1;
ar9xxx_wmac_resources[1].start = AR934X_IP2_IRQ_WMAC;
ar9xxx_wmac_resources[1].start = AR934X_IP2_IRQ_WMAC;
if (ar71xx_ref_freq == MHZ_25)
ar9xxx_wmac_data.is_clk_25mhz = true;
}
void __init ar9xxx_add_device_wmac(u8 *cal_data, u8 *mac_addr)
{
switch (ar71xx_soc) {
case AR71XX_SOC_AR9130:
case AR71XX_SOC_AR9132:
ar913x_wmac_init();
break;
case AR71XX_SOC_AR9330:
case AR71XX_SOC_AR9331:
ar933x_wmac_init();
break;
case AR71XX_SOC_AR9341:
case AR71XX_SOC_AR9342:
case AR71XX_SOC_AR9344:
ar934x_wmac_init();
break;
default:
BUG();
}
if (cal_data)
memcpy(ar9xxx_wmac_data.eeprom_data, cal_data,
sizeof(ar9xxx_wmac_data.eeprom_data));
if (mac_addr) {
memcpy(ar9xxx_wmac_mac, mac_addr, sizeof(ar9xxx_wmac_mac));
ar9xxx_wmac_data.macaddr = ar9xxx_wmac_mac;
}
platform_device_register(&ar9xxx_wmac_device);
}
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