target/linux/ramips/files/arch/mips/ralink/rt305x/devices.c

   1 /*
   2  *  Ralink RT305x SoC platform device registration
   3  *
   4  *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/err.h>
  14 #include <linux/clk.h>
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mtd/physmap.h>
  17
  18 #include <asm/addrspace.h>
  19
  20 #include <asm/mach-ralink/rt305x.h>
  21 #include <asm/mach-ralink/rt305x_regs.h>
  22 #include "devices.h"
  23
  24 #include <ramips_eth_platform.h>
  25
  26 static struct resource rt305x_flash0_resources[] = {
  27         {
  28                 .flags  = IORESOURCE_MEM,
  29                 .start  = KSEG1ADDR(RT305X_FLASH0_BASE),
  30                 .end    = KSEG1ADDR(RT305X_FLASH0_BASE) +
  31                           RT305X_FLASH0_SIZE - 1,
  32         },
  33 };
  34
  35 static struct platform_device rt305x_flash0_device = {
  36         .name           = "physmap-flash",
  37         .resource       = rt305x_flash0_resources,
  38         .num_resources  = ARRAY_SIZE(rt305x_flash0_resources),
  39 };
  40
  41 static struct resource rt305x_flash1_resources[] = {
  42         {
  43                 .flags  = IORESOURCE_MEM,
  44                 .start  = KSEG1ADDR(RT305X_FLASH1_BASE),
  45                 .end    = KSEG1ADDR(RT305X_FLASH1_BASE) +
  46                           RT305X_FLASH1_SIZE - 1,
  47         },
  48 };
  49
  50 static struct platform_device rt305x_flash1_device = {
  51         .name           = "physmap-flash",
  52         .resource       = rt305x_flash1_resources,
  53         .num_resources  = ARRAY_SIZE(rt305x_flash1_resources),
  54 };
  55
  56 static int rt305x_flash_instance __initdata;
  57 void __init rt305x_register_flash(unsigned int id,
  58                                   struct physmap_flash_data *pdata)
  59 {
  60         struct platform_device *pdev;
  61         u32 t;
  62         int reg;
  63
  64         switch (id) {
  65         case 0:
  66                 pdev = &rt305x_flash0_device;
  67                 reg = MEMC_REG_FLASH_CFG0;
  68                 break;
  69         case 1:
  70                 pdev = &rt305x_flash1_device;
  71                 reg = MEMC_REG_FLASH_CFG1;
  72                 break;
  73         default:
  74                 return;
  75         }
  76
  77         t = rt305x_memc_rr(reg);
  78         t = (t >> FLASH_CFG_WIDTH_SHIFT) & FLASH_CFG_WIDTH_MASK;
  79
  80         switch (t) {
  81         case FLASH_CFG_WIDTH_8BIT:
  82                 pdata->width = 1;
  83                 break;
  84         case FLASH_CFG_WIDTH_16BIT:
  85                 pdata->width = 2;
  86                 break;
  87         case FLASH_CFG_WIDTH_32BIT:
  88                 pdata->width = 4;
  89                 break;
  90         default:
  91                 printk(KERN_ERR "RT305x: flash bank%u witdh is invalid\n", id);
  92                 return;
  93         }
  94
  95         pdev->dev.platform_data = pdata;
  96         pdev->id = rt305x_flash_instance;
  97
  98         platform_device_register(pdev);
  99         rt305x_flash_instance++;
 100 }
 101
 102 static void rt305x_fe_reset(void)
 103 {
 104         rt305x_sysc_wr(RT305X_RESET_FE, SYSC_REG_RESET_CTRL);
 105         rt305x_sysc_wr(0, SYSC_REG_RESET_CTRL);
 106 }
 107
 108 static struct resource rt305x_eth_resources[] = {
 109         {
 110                 .start  = RT305X_FE_BASE,
 111                 .end    = RT305X_FE_BASE + PAGE_SIZE - 1,
 112                 .flags  = IORESOURCE_MEM,
 113         }, {
 114                 .start  = RT305X_CPU_IRQ_FE,
 115                 .end    = RT305X_CPU_IRQ_FE,
 116                 .flags  = IORESOURCE_IRQ,
 117         },
 118 };
 119
 120 static struct ramips_eth_platform_data ramips_eth_data = {
 121         .mac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
 122         .reset_fe = rt305x_fe_reset,
 123         .min_pkt_len = 64,
 124 };
 125
 126 static struct platform_device rt305x_eth_device = {
 127         .name           = "ramips_eth",
 128         .resource       = rt305x_eth_resources,
 129         .num_resources  = ARRAY_SIZE(rt305x_eth_resources),
 130         .dev = {
 131                 .platform_data = &ramips_eth_data,
 132         }
 133 };
 134
 135 static struct resource rt305x_esw_resources[] = {
 136         {
 137                 .start  = RT305X_SWITCH_BASE,
 138                 .end    = RT305X_SWITCH_BASE + PAGE_SIZE - 1,
 139                 .flags  = IORESOURCE_MEM,
 140         },
 141 };
 142
 143 struct rt305x_esw_platform_data rt305x_esw_data;
 144 static struct platform_device rt305x_esw_device = {
 145         .name           = "rt305x-esw",
 146         .resource       = rt305x_esw_resources,
 147         .num_resources  = ARRAY_SIZE(rt305x_esw_resources),
 148         .dev = {
 149                 .platform_data = &rt305x_esw_data,
 150         }
 151 };
 152
 153 void __init rt305x_register_ethernet(void)
 154 {
 155         struct clk *clk;
 156
 157         clk = clk_get(NULL, "sys");
 158         if (IS_ERR(clk))
 159                 panic("unable to get SYS clock, err=%ld", PTR_ERR(clk));
 160
 161         ramips_eth_data.sys_freq = clk_get_rate(clk);
 162
 163         platform_device_register(&rt305x_esw_device);
 164         platform_device_register(&rt305x_eth_device);
 165 }
 166
 167 static struct resource rt305x_wifi_resources[] = {
 168         {
 169                 .start  = RT305X_WMAC_BASE,
 170                 .end    = RT305X_WMAC_BASE + 0x3FFFF,
 171                 .flags  = IORESOURCE_MEM,
 172         }, {
 173                 .start  = RT305X_CPU_IRQ_WNIC,
 174                 .end    = RT305X_CPU_IRQ_WNIC,
 175                 .flags  = IORESOURCE_IRQ,
 176         },
 177 };
 178
 179 static struct platform_device rt305x_wifi_device = {
 180         .name                   = "rt2800_wmac",
 181         .resource               = rt305x_wifi_resources,
 182         .num_resources  = ARRAY_SIZE(rt305x_wifi_resources),
 183         .dev = {
 184                 .platform_data = NULL,
 185         }
 186 };
 187
 188 void __init rt305x_register_wifi(void)
 189 {
 190         platform_device_register(&rt305x_wifi_device);
 191 }
 192
 193 static struct resource rt305x_wdt_resources[] = {
 194         {
 195                 .start  = RT305X_TIMER_BASE,
 196                 .end    = RT305X_TIMER_BASE + RT305X_TIMER_SIZE - 1,
 197                 .flags  = IORESOURCE_MEM,
 198         },
 199 };
 200
 201 static struct platform_device rt305x_wdt_device = {
 202         .name           = "ramips-wdt",
 203         .id             = -1,
 204         .resource       = rt305x_wdt_resources,
 205         .num_resources  = ARRAY_SIZE(rt305x_wdt_resources),
 206 };
 207
 208 void __init rt305x_register_wdt(void)
 209 {
 210         u32 t;
 211
 212         /* enable WDT reset output on pin SRAM_CS_N */
 213         t = rt305x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
 214         t |= SYSTEM_CONFIG_SRAM_CS0_MODE_WDT <<
 215              SYSTEM_CONFIG_SRAM_CS0_MODE_SHIFT;
 216         rt305x_sysc_wr(t, SYSC_REG_SYSTEM_CONFIG);
 217
 218         platform_device_register(&rt305x_wdt_device);
 219 }