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

   1 /*
   2  *  Ralink RT305x SoC platform device registration
   3  *
   4  *  Copyright (C) 2009 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/mtd/mtd.h>
  14 #include <linux/mtd/physmap.h>
  15
  16 #include <asm/addrspace.h>
  17
  18 #include <asm/mach-ralink/rt305x.h>
  19 #include <asm/mach-ralink/rt305x_regs.h>
  20 #include "devices.h"
  21
  22 #include <ramips_eth_platform.h>
  23
  24 static struct resource rt305x_flash0_resources[] = {
  25         {
  26                 .flags  = IORESOURCE_MEM,
  27                 .start  = KSEG1ADDR(RT305X_FLASH0_BASE),
  28                 .end    = KSEG1ADDR(RT305X_FLASH0_BASE) +
  29                           RT305X_FLASH0_SIZE - 1,
  30         },
  31 };
  32
  33 static struct platform_device rt305x_flash0_device = {
  34         .name           = "physmap-flash",
  35         .resource       = rt305x_flash0_resources,
  36         .num_resources  = ARRAY_SIZE(rt305x_flash0_resources),
  37 };
  38
  39 static struct resource rt305x_flash1_resources[] = {
  40         {
  41                 .flags  = IORESOURCE_MEM,
  42                 .start  = KSEG1ADDR(RT305X_FLASH1_BASE),
  43                 .end    = KSEG1ADDR(RT305X_FLASH1_BASE) +
  44                           RT305X_FLASH1_SIZE - 1,
  45         },
  46 };
  47
  48 static struct platform_device rt305x_flash1_device = {
  49         .name           = "physmap-flash",
  50         .resource       = rt305x_flash1_resources,
  51         .num_resources  = ARRAY_SIZE(rt305x_flash1_resources),
  52 };
  53
  54 static int rt305x_flash_instance __initdata;
  55 void __init rt305x_register_flash(unsigned int id,
  56                                   struct physmap_flash_data *pdata)
  57 {
  58         struct platform_device *pdev;
  59         u32 t;
  60         int reg;
  61
  62         switch (id) {
  63         case 0:
  64                 pdev = &rt305x_flash0_device;
  65                 reg = MEMC_REG_FLASH_CFG0;
  66                 break;
  67         case 1:
  68                 pdev = &rt305x_flash1_device;
  69                 reg = MEMC_REG_FLASH_CFG1;
  70                 break;
  71         default:
  72                 return;
  73         }
  74
  75         t = rt305x_memc_rr(reg);
  76         t = (t >> FLASH_CFG_WIDTH_SHIFT) & FLASH_CFG_WIDTH_MASK;
  77
  78         switch (t) {
  79         case FLASH_CFG_WIDTH_8BIT:
  80                 pdata->width = 1;
  81                 break;
  82         case FLASH_CFG_WIDTH_16BIT:
  83                 pdata->width = 2;
  84                 break;
  85         case FLASH_CFG_WIDTH_32BIT:
  86                 pdata->width = 4;
  87                 break;
  88         default:
  89                 printk(KERN_ERR "RT305x: flash bank%u witdh is invalid\n", id);
  90                 return;
  91         }
  92
  93         pdev->dev.platform_data = pdata;
  94         pdev->id = rt305x_flash_instance;
  95
  96         platform_device_register(pdev);
  97         rt305x_flash_instance++;
  98 }
  99
 100 static void rt305x_fe_reset(void)
 101 {
 102         rt305x_sysc_wr(RAMIPS_FE_RESET_BIT, RAMIPS_FE_RESET);
 103         rt305x_sysc_wr(0, RAMIPS_FE_RESET);
 104 }
 105
 106 static struct resource rt305x_eth_resources[] = {
 107         {
 108                 .start  = RT305X_FE_BASE,
 109                 .end    = RT305X_FE_BASE + PAGE_SIZE - 1,
 110                 .flags  = IORESOURCE_MEM,
 111         }, {
 112                 .start  = RT305X_CPU_IRQ_FE,
 113                 .end    = RT305X_CPU_IRQ_FE,
 114                 .flags  = IORESOURCE_IRQ,
 115         },
 116 };
 117
 118 static struct ramips_eth_platform_data ramips_eth_data = {
 119         .mac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
 120         .reset_fe = rt305x_fe_reset,
 121         .min_pkt_len = 64
 122 };
 123
 124 static struct platform_device rt305x_eth_device = {
 125         .name           = "ramips_eth",
 126         .resource       = rt305x_eth_resources,
 127         .num_resources  = ARRAY_SIZE(rt305x_eth_resources),
 128         .dev = {
 129                 .platform_data = &ramips_eth_data,
 130         }
 131 };
 132
 133 void __init rt305x_register_ethernet(void)
 134 {
 135         platform_device_register(&rt305x_eth_device);
 136 }