| 1 | /* |
| 2 | * Atheros AR9XXX SoCs built-in WMAC device support |
| 3 | * |
| 4 | * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> |
| 5 | * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> |
| 6 | * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| 7 | * |
| 8 | * Parts of this file are based on Atheros 2.6.15/2.6.31 BSP |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License version 2 as published |
| 12 | * by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/etherdevice.h> |
| 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/ath9k_platform.h> |
| 21 | |
| 22 | #include <asm/mach-ar71xx/ar71xx.h> |
| 23 | |
| 24 | #include "dev-ar9xxx-wmac.h" |
| 25 | |
| 26 | #define MHZ_25 (25 * 1000 * 1000) |
| 27 | |
| 28 | static struct ath9k_platform_data ar9xxx_wmac_data = { |
| 29 | .led_pin = -1, |
| 30 | }; |
| 31 | static char ar9xxx_wmac_mac[6]; |
| 32 | |
| 33 | static struct resource ar9xxx_wmac_resources[] = { |
| 34 | { |
| 35 | /* .start and .end fields are filled dynamically */ |
| 36 | .flags = IORESOURCE_MEM, |
| 37 | }, { |
| 38 | .start = AR71XX_CPU_IRQ_IP2, |
| 39 | .end = AR71XX_CPU_IRQ_IP2, |
| 40 | .flags = IORESOURCE_IRQ, |
| 41 | }, |
| 42 | }; |
| 43 | |
| 44 | static struct platform_device ar9xxx_wmac_device = { |
| 45 | .name = "ath9k", |
| 46 | .id = -1, |
| 47 | .resource = ar9xxx_wmac_resources, |
| 48 | .num_resources = ARRAY_SIZE(ar9xxx_wmac_resources), |
| 49 | .dev = { |
| 50 | .platform_data = &ar9xxx_wmac_data, |
| 51 | }, |
| 52 | }; |
| 53 | |
| 54 | static void ar913x_wmac_init(void) |
| 55 | { |
| 56 | ar71xx_device_stop(RESET_MODULE_AMBA2WMAC); |
| 57 | mdelay(10); |
| 58 | |
| 59 | ar71xx_device_start(RESET_MODULE_AMBA2WMAC); |
| 60 | mdelay(10); |
| 61 | |
| 62 | ar9xxx_wmac_resources[0].start = AR91XX_WMAC_BASE; |
| 63 | ar9xxx_wmac_resources[0].end = AR91XX_WMAC_BASE + AR91XX_WMAC_SIZE - 1; |
| 64 | } |
| 65 | |
| 66 | static int ar933x_r1_get_wmac_revision(void) |
| 67 | { |
| 68 | return ar71xx_soc_rev; |
| 69 | } |
| 70 | |
| 71 | static int ar933x_wmac_reset(void) |
| 72 | { |
| 73 | unsigned retries = 0; |
| 74 | |
| 75 | ar71xx_device_stop(AR933X_RESET_WMAC); |
| 76 | ar71xx_device_start(AR933X_RESET_WMAC); |
| 77 | |
| 78 | while (1) { |
| 79 | u32 bootstrap; |
| 80 | |
| 81 | bootstrap = ar71xx_reset_rr(AR933X_RESET_REG_BOOTSTRAP); |
| 82 | if ((bootstrap & AR933X_BOOTSTRAP_EEPBUSY) == 0) |
| 83 | return 0; |
| 84 | |
| 85 | if (retries > 20) |
| 86 | break; |
| 87 | |
| 88 | udelay(10000); |
| 89 | retries++; |
| 90 | } |
| 91 | |
| 92 | pr_err("ar93xx: WMAC reset timed out"); |
| 93 | return -ETIMEDOUT; |
| 94 | } |
| 95 | |
| 96 | static void ar933x_wmac_init(void) |
| 97 | { |
| 98 | ar9xxx_wmac_device.name = "ar933x_wmac"; |
| 99 | ar9xxx_wmac_resources[0].start = AR933X_WMAC_BASE; |
| 100 | ar9xxx_wmac_resources[0].end = AR933X_WMAC_BASE + AR933X_WMAC_SIZE - 1; |
| 101 | if (ar71xx_ref_freq == MHZ_25) |
| 102 | ar9xxx_wmac_data.is_clk_25mhz = true; |
| 103 | |
| 104 | if (ar71xx_soc_rev == 1) |
| 105 | ar9xxx_wmac_data.get_mac_revision = ar933x_r1_get_wmac_revision; |
| 106 | |
| 107 | ar9xxx_wmac_data.external_reset = ar933x_wmac_reset; |
| 108 | |
| 109 | ar933x_wmac_reset(); |
| 110 | } |
| 111 | |
| 112 | static void ar934x_wmac_init(void) |
| 113 | { |
| 114 | ar9xxx_wmac_device.name = "ar934x_wmac"; |
| 115 | ar9xxx_wmac_resources[0].start = AR934X_WMAC_BASE; |
| 116 | ar9xxx_wmac_resources[0].end = AR934X_WMAC_BASE + AR934X_WMAC_SIZE - 1; |
| 117 | if (ar71xx_ref_freq == MHZ_25) |
| 118 | ar9xxx_wmac_data.is_clk_25mhz = true; |
| 119 | } |
| 120 | |
| 121 | void __init ar9xxx_add_device_wmac(u8 *cal_data, u8 *mac_addr) |
| 122 | { |
| 123 | switch (ar71xx_soc) { |
| 124 | case AR71XX_SOC_AR9130: |
| 125 | case AR71XX_SOC_AR9132: |
| 126 | ar913x_wmac_init(); |
| 127 | break; |
| 128 | |
| 129 | case AR71XX_SOC_AR9330: |
| 130 | case AR71XX_SOC_AR9331: |
| 131 | ar933x_wmac_init(); |
| 132 | break; |
| 133 | |
| 134 | case AR71XX_SOC_AR9341: |
| 135 | case AR71XX_SOC_AR9342: |
| 136 | case AR71XX_SOC_AR9344: |
| 137 | ar934x_wmac_init(); |
| 138 | break; |
| 139 | |
| 140 | default: |
| 141 | BUG(); |
| 142 | } |
| 143 | |
| 144 | if (cal_data) |
| 145 | memcpy(ar9xxx_wmac_data.eeprom_data, cal_data, |
| 146 | sizeof(ar9xxx_wmac_data.eeprom_data)); |
| 147 | |
| 148 | if (mac_addr) { |
| 149 | memcpy(ar9xxx_wmac_mac, mac_addr, sizeof(ar9xxx_wmac_mac)); |
| 150 | ar9xxx_wmac_data.macaddr = ar9xxx_wmac_mac; |
| 151 | } |
| 152 | |
| 153 | platform_device_register(&ar9xxx_wmac_device); |
| 154 | } |
| 155 | |
