target/linux/ramips/files/arch/mips/ralink/rt288x/rt288x.c

   1 /*
   2  * Ralink RT288x SoC specific setup
   3  *
   4  * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   5  * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  * Parts of this file are based on Ralink's 2.6.21 BSP
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License version 2 as published
  11  * by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17
  18 #include <asm/mach-ralink/common.h>
  19 #include <asm/mach-ralink/ramips_gpio.h>
  20 #include <asm/mach-ralink/rt288x.h>
  21 #include <asm/mach-ralink/rt288x_regs.h>
  22
  23 void __iomem * rt288x_sysc_base;
  24 void __iomem * rt288x_memc_base;
  25
  26 void __init ramips_soc_prom_init(void)
  27 {
  28         void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT2880_SYSC_BASE);
  29         u32 n0;
  30         u32 n1;
  31         u32 id;
  32
  33         n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
  34         n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
  35         id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
  36
  37         snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
  38                 "Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
  39                 (char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
  40                 (char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
  41                 (char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
  42                 (char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
  43                 (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
  44                 (id & CHIP_ID_REV_MASK));
  45
  46         ramips_mem_base = RT2880_SDRAM_BASE;
  47         ramips_mem_size_min = RT288X_MEM_SIZE_MIN;
  48         ramips_mem_size_max = RT288X_MEM_SIZE_MAX;
  49 }
  50
  51 static struct ramips_gpio_chip rt288x_gpio_chips[] = {
  52         {
  53                 .chip = {
  54                         .label  = "RT288X-GPIO0",
  55                         .base   = 0,
  56                         .ngpio  = 24,
  57                 },
  58                 .regs = {
  59                         [RAMIPS_GPIO_REG_INT]   = 0x00,
  60                         [RAMIPS_GPIO_REG_EDGE]  = 0x04,
  61                         [RAMIPS_GPIO_REG_RENA]  = 0x08,
  62                         [RAMIPS_GPIO_REG_FENA]  = 0x0c,
  63                         [RAMIPS_GPIO_REG_DATA]  = 0x20,
  64                         [RAMIPS_GPIO_REG_DIR]   = 0x24,
  65                         [RAMIPS_GPIO_REG_POL]   = 0x28,
  66                         [RAMIPS_GPIO_REG_SET]   = 0x2c,
  67                         [RAMIPS_GPIO_REG_RESET] = 0x30,
  68                         [RAMIPS_GPIO_REG_TOGGLE] = 0x34,
  69                 },
  70                 .map_base = RT2880_PIO_BASE,
  71                 .map_size = RT2880_PIO_SIZE,
  72         },
  73         {
  74                 .chip = {
  75                         .label  = "RT288X-GPIO1",
  76                         .base   = 24,
  77                         .ngpio  = 16,
  78                 },
  79                 .regs = {
  80                         [RAMIPS_GPIO_REG_INT]   = 0x38,
  81                         [RAMIPS_GPIO_REG_EDGE]  = 0x3c,
  82                         [RAMIPS_GPIO_REG_RENA]  = 0x40,
  83                         [RAMIPS_GPIO_REG_FENA]  = 0x44,
  84                         [RAMIPS_GPIO_REG_DATA]  = 0x48,
  85                         [RAMIPS_GPIO_REG_DIR]   = 0x4c,
  86                         [RAMIPS_GPIO_REG_POL]   = 0x50,
  87                         [RAMIPS_GPIO_REG_SET]   = 0x54,
  88                         [RAMIPS_GPIO_REG_RESET] = 0x58,
  89                         [RAMIPS_GPIO_REG_TOGGLE] = 0x5c,
  90                 },
  91                 .map_base = RT2880_PIO_BASE,
  92                 .map_size = RT2880_PIO_SIZE,
  93         },
  94         {
  95                 .chip = {
  96                         .label  = "RT288X-GPIO2",
  97                         .base   = 40,
  98                         .ngpio  = 32,
  99                 },
 100                 .regs = {
 101                         [RAMIPS_GPIO_REG_INT]   = 0x60,
 102                         [RAMIPS_GPIO_REG_EDGE]  = 0x64,
 103                         [RAMIPS_GPIO_REG_RENA]  = 0x68,
 104                         [RAMIPS_GPIO_REG_FENA]  = 0x6c,
 105                         [RAMIPS_GPIO_REG_DATA]  = 0x70,
 106                         [RAMIPS_GPIO_REG_DIR]   = 0x74,
 107                         [RAMIPS_GPIO_REG_POL]   = 0x78,
 108                         [RAMIPS_GPIO_REG_SET]   = 0x7c,
 109                         [RAMIPS_GPIO_REG_RESET] = 0x80,
 110                         [RAMIPS_GPIO_REG_TOGGLE] = 0x84,
 111                 },
 112                 .map_base = RT2880_PIO_BASE,
 113                 .map_size = RT2880_PIO_SIZE,
 114         },
 115 };
 116
 117 static struct ramips_gpio_data rt288x_gpio_data = {
 118         .chips = rt288x_gpio_chips,
 119         .num_chips = ARRAY_SIZE(rt288x_gpio_chips),
 120 };
 121
 122 static void rt288x_gpio_reserve(int first, int last)
 123 {
 124         for (; first <= last; first++)
 125                 gpio_request(first, "reserved");
 126 }
 127
 128 void __init rt288x_gpio_init(u32 mode)
 129 {
 130         rt288x_sysc_wr(mode, SYSC_REG_GPIO_MODE);
 131
 132         ramips_gpio_init(&rt288x_gpio_data);
 133         if ((mode & RT2880_GPIO_MODE_I2C) == 0)
 134                 rt288x_gpio_reserve(1, 2);
 135
 136         if ((mode & RT2880_GPIO_MODE_SPI) == 0)
 137                 rt288x_gpio_reserve(3, 6);
 138
 139         if ((mode & RT2880_GPIO_MODE_UART0) == 0)
 140                 rt288x_gpio_reserve(7, 14);
 141
 142         if ((mode & RT2880_GPIO_MODE_JTAG) == 0)
 143                 rt288x_gpio_reserve(17, 21);
 144
 145         if ((mode & RT2880_GPIO_MODE_MDIO) == 0)
 146                 rt288x_gpio_reserve(22, 23);
 147
 148         if ((mode & RT2880_GPIO_MODE_SDRAM) == 0)
 149                 rt288x_gpio_reserve(24, 39);
 150
 151         if ((mode & RT2880_GPIO_MODE_PCI) == 0)
 152                 rt288x_gpio_reserve(40, 71);
 153 }