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

   1 /*
   2  * Ralink RT288x SoC specific setup
   3  *
   4  * Copyright (C) 2008-2009 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 #include <linux/gpio.h>
  18
  19 #include <asm/mach-ralink/common.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 rt288x_detect_sys_type(void)
  27 {
  28         u32 n0;
  29         u32 n1;
  30         u32 id;
  31
  32         n0 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME0);
  33         n1 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME1);
  34         id = rt288x_sysc_rr(SYSC_REG_CHIP_ID);
  35
  36         snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
  37                 "Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
  38                 (char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
  39                 (char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
  40                 (char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
  41                 (char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
  42                 (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
  43                 (id & CHIP_ID_REV_MASK));
  44 }
  45
  46 static void rt288x_gpio_reserve(int first, int last)
  47 {
  48         for (; first <= last; first++)
  49                 gpio_request(first, "reserved");
  50 }
  51
  52 void __init rt288x_gpio_init(u32 mode)
  53 {
  54         rt288x_sysc_wr(mode, SYSC_REG_GPIO_MODE);
  55
  56         ramips_gpio_init();
  57         if ((mode & RT2880_GPIO_MODE_I2C) == 0)
  58                 rt288x_gpio_reserve(1, 2);
  59
  60         if ((mode & RT2880_GPIO_MODE_SPI) == 0)
  61                 rt288x_gpio_reserve(3, 6);
  62
  63         if ((mode & RT2880_GPIO_MODE_UART0) == 0)
  64                 rt288x_gpio_reserve(7, 14);
  65
  66         if ((mode & RT2880_GPIO_MODE_JTAG) == 0)
  67                 rt288x_gpio_reserve(17, 21);
  68
  69         if ((mode & RT2880_GPIO_MODE_MDIO) == 0)
  70                 rt288x_gpio_reserve(22, 23);
  71
  72         if ((mode & RT2880_GPIO_MODE_SDRAM) == 0)
  73                 rt288x_gpio_reserve(24, 39);
  74
  75         if ((mode & RT2880_GPIO_MODE_PCI) == 0)
  76                 rt288x_gpio_reserve(40, 71);
  77 }