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