arch/mips/ath79/dev-wmac.c

   1 /*
   2  *  Atheros AR913X/AR933X SoC built-in WMAC device support
   3  *
   4  *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify it
   8  *  under the terms of the GNU General Public License version 2 as published
   9  *  by the Free Software Foundation.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/irq.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/ath9k_platform.h>
  17
  18 #include <asm/mach-ath79/ath79.h>
  19 #include <asm/mach-ath79/ar71xx_regs.h>
  20 #include "dev-wmac.h"
  21
  22 static struct ath9k_platform_data ath79_wmac_data;
  23
  24 static struct resource ath79_wmac_resources[] = {
  25         {
  26                 /* .start and .end fields are filled dynamically */
  27                 .flags  = IORESOURCE_MEM,
  28         }, {
  29                 .start  = ATH79_CPU_IRQ_IP2,
  30                 .end    = ATH79_CPU_IRQ_IP2,
  31                 .flags  = IORESOURCE_IRQ,
  32         },
  33 };
  34
  35 static struct platform_device ath79_wmac_device = {
  36         .name           = "ath9k",
  37         .id             = -1,
  38         .resource       = ath79_wmac_resources,
  39         .num_resources  = ARRAY_SIZE(ath79_wmac_resources),
  40         .dev = {
  41                 .platform_data = &ath79_wmac_data,
  42         },
  43 };
  44
  45 static void __init ar913x_wmac_setup(void)
  46 {
  47         /* reset the WMAC */
  48         ath79_device_reset_set(AR913X_RESET_AMBA2WMAC);
  49         mdelay(10);
  50
  51         ath79_device_reset_clear(AR913X_RESET_AMBA2WMAC);
  52         mdelay(10);
  53
  54         ath79_wmac_resources[0].start = AR913X_WMAC_BASE;
  55         ath79_wmac_resources[0].end = AR913X_WMAC_BASE + AR913X_WMAC_SIZE - 1;
  56 }
  57
  58
  59 static int ar933x_wmac_reset(void)
  60 {
  61         ath79_device_reset_clear(AR933X_RESET_WMAC);
  62         ath79_device_reset_set(AR933X_RESET_WMAC);
  63
  64         return 0;
  65 }
  66
  67 static int ar933x_r1_get_wmac_revision(void)
  68 {
  69         return ath79_soc_rev;
  70 }
  71
  72 static void __init ar933x_wmac_setup(void)
  73 {
  74         u32 t;
  75
  76         ar933x_wmac_reset();
  77
  78         ath79_wmac_device.name = "ar933x_wmac";
  79
  80         ath79_wmac_resources[0].start = AR933X_WMAC_BASE;
  81         ath79_wmac_resources[0].end = AR933X_WMAC_BASE + AR933X_WMAC_SIZE - 1;
  82
  83         t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
  84         if (t & AR933X_BOOTSTRAP_REF_CLK_40)
  85                 ath79_wmac_data.is_clk_25mhz = false;
  86         else
  87                 ath79_wmac_data.is_clk_25mhz = true;
  88
  89         if (ath79_soc_rev == 1)
  90                 ath79_wmac_data.get_mac_revision = ar933x_r1_get_wmac_revision;
  91
  92         ath79_wmac_data.external_reset = ar933x_wmac_reset;
  93 }
  94
  95 void __init ath79_register_wmac(u8 *cal_data)
  96 {
  97         if (soc_is_ar913x())
  98                 ar913x_wmac_setup();
  99         else if (soc_is_ar933x())
 100                 ar933x_wmac_setup();
 101         else
 102                 BUG();
 103
 104         if (cal_data)
 105                 memcpy(ath79_wmac_data.eeprom_data, cal_data,
 106                        sizeof(ath79_wmac_data.eeprom_data));
 107
 108         platform_device_register(&ath79_wmac_device);
 109 }