target/linux/ar71xx/files/arch/mips/ar71xx/dev-ar9xxx-wmac.c

   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 }