arch/mips/ath79/dev-wmac.c

   1 /*
   2  *  Atheros AR913X/AR933X SoC built-in WMAC device support
   3  *
   4  *  Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
   5  *  Copyright (C) 2008-2011 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/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/irq.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/ath9k_platform.h>
  20
  21 #include <asm/mach-ath79/ath79.h>
  22 #include <asm/mach-ath79/ar71xx_regs.h>
  23 #include "dev-wmac.h"
  24
  25 static struct ath9k_platform_data ath79_wmac_data;
  26
  27 static struct resource ath79_wmac_resources[] = {
  28         {
  29                 /* .start and .end fields are filled dynamically */
  30                 .flags  = IORESOURCE_MEM,
  31         }, {
  32                 /* .start and .end fields are filled dynamically */
  33                 .flags  = IORESOURCE_IRQ,
  34         },
  35 };
  36
  37 static struct platform_device ath79_wmac_device = {
  38         .name           = "ath9k",
  39         .id             = -1,
  40         .resource       = ath79_wmac_resources,
  41         .num_resources  = ARRAY_SIZE(ath79_wmac_resources),
  42         .dev = {
  43                 .platform_data = &ath79_wmac_data,
  44         },
  45 };
  46
  47 static void __init ar913x_wmac_setup(void)
  48 {
  49         /* reset the WMAC */
  50         ath79_device_reset_set(AR913X_RESET_AMBA2WMAC);
  51         mdelay(10);
  52
  53         ath79_device_reset_clear(AR913X_RESET_AMBA2WMAC);
  54         mdelay(10);
  55
  56         ath79_wmac_resources[0].start = AR913X_WMAC_BASE;
  57         ath79_wmac_resources[0].end = AR913X_WMAC_BASE + AR913X_WMAC_SIZE - 1;
  58         ath79_wmac_resources[1].start = ATH79_CPU_IRQ_IP2;
  59         ath79_wmac_resources[1].end = ATH79_CPU_IRQ_IP2;
  60 }
  61
  62
  63 static int ar933x_wmac_reset(void)
  64 {
  65         ath79_device_reset_set(AR933X_RESET_WMAC);
  66         ath79_device_reset_clear(AR933X_RESET_WMAC);
  67
  68         return 0;
  69 }
  70
  71 static int ar933x_r1_get_wmac_revision(void)
  72 {
  73         return ath79_soc_rev;
  74 }
  75
  76 static void __init ar933x_wmac_setup(void)
  77 {
  78         u32 t;
  79
  80         ar933x_wmac_reset();
  81
  82         ath79_wmac_device.name = "ar933x_wmac";
  83
  84         ath79_wmac_resources[0].start = AR933X_WMAC_BASE;
  85         ath79_wmac_resources[0].end = AR933X_WMAC_BASE + AR933X_WMAC_SIZE - 1;
  86         ath79_wmac_resources[1].start = ATH79_CPU_IRQ_IP2;
  87         ath79_wmac_resources[1].end = ATH79_CPU_IRQ_IP2;
  88
  89         t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
  90         if (t & AR933X_BOOTSTRAP_REF_CLK_40)
  91                 ath79_wmac_data.is_clk_25mhz = false;
  92         else
  93                 ath79_wmac_data.is_clk_25mhz = true;
  94
  95         if (ath79_soc_rev == 1)
  96                 ath79_wmac_data.get_mac_revision = ar933x_r1_get_wmac_revision;
  97
  98         ath79_wmac_data.external_reset = ar933x_wmac_reset;
  99 }
 100
 101 static void ar934x_wmac_setup(void)
 102 {
 103         u32 t;
 104
 105         ath79_wmac_device.name = "ar934x_wmac";
 106
 107         ath79_wmac_resources[0].start = AR934X_WMAC_BASE;
 108         ath79_wmac_resources[0].end = AR934X_WMAC_BASE + AR934X_WMAC_SIZE - 1;
 109         ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1);
 110         ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1);
 111
 112         t = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
 113         if (t & AR934X_BOOTSTRAP_REF_CLK_40)
 114                 ath79_wmac_data.is_clk_25mhz = false;
 115         else
 116                 ath79_wmac_data.is_clk_25mhz = true;
 117 }
 118
 119 void __init ath79_register_wmac(u8 *cal_data)
 120 {
 121         if (soc_is_ar913x())
 122                 ar913x_wmac_setup();
 123         else if (soc_is_ar933x())
 124                 ar933x_wmac_setup();
 125         else if (soc_is_ar934x())
 126                 ar934x_wmac_setup();
 127         else
 128                 BUG();
 129
 130         if (cal_data)
 131                 memcpy(ath79_wmac_data.eeprom_data, cal_data,
 132                        sizeof(ath79_wmac_data.eeprom_data));
 133
 134         platform_device_register(&ath79_wmac_device);
 135 }