LXR linux/arch/mips/alchemy/board-xxs1500.c

   1/*
   2 * BRIEF MODULE DESCRIPTION
   3 *      MyCable XXS1500 board support
   4 *
   5 * Copyright 2003, 2008 MontaVista Software Inc.
   6 * Author: MontaVista Software, Inc. <source@mvista.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21 */
  22
  23#include <linux/kernel.h>
  24#include <linux/init.h>
  25#include <linux/interrupt.h>
  26#include <linux/platform_device.h>
  27#include <linux/gpio.h>
  28#include <linux/delay.h>
  29#include <linux/pm.h>
  30#include <asm/bootinfo.h>
  31#include <asm/reboot.h>
  32#include <asm/mach-au1x00/au1000.h>
  33#include <prom.h>
  34
  35const char *get_system_type(void)
  36{
  37        return "XXS1500";
  38}
  39
  40void __init prom_init(void)
  41{
  42        unsigned char *memsize_str;
  43        unsigned long memsize;
  44
  45        prom_argc = fw_arg0;
  46        prom_argv = (char **)fw_arg1;
  47        prom_envp = (char **)fw_arg2;
  48
  49        prom_init_cmdline();
  50
  51        memsize_str = prom_getenv("memsize");
  52        if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  53                memsize = 0x04000000;
  54
  55        add_memory_region(0, memsize, BOOT_MEM_RAM);
  56}
  57
  58void prom_putchar(unsigned char c)
  59{
  60        alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  61}
  62
  63static void xxs1500_reset(char *c)
  64{
  65        /* Jump to the reset vector */
  66        __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
  67}
  68
  69static void xxs1500_power_off(void)
  70{
  71        while (1)
  72                asm volatile (
  73                "       .set    mips32                                  \n"
  74                "       wait                                            \n"
  75                "       .set    mips0                                   \n");
  76}
  77
  78void __init board_setup(void)
  79{
  80        u32 pin_func;
  81
  82        pm_power_off = xxs1500_power_off;
  83        _machine_halt = xxs1500_power_off;
  84        _machine_restart = xxs1500_reset;
  85
  86        alchemy_gpio1_input_enable();
  87        alchemy_gpio2_enable();
  88
  89        /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
  90        pin_func  = alchemy_rdsys(AU1000_SYS_PINFUNC) & ~SYS_PF_UR3;
  91        pin_func |= SYS_PF_UR3;
  92        alchemy_wrsys(pin_func, AU1000_SYS_PINFUNC);
  93
  94        /* Enable UART */
  95        alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
  96        /* Enable DTR (MCR bit 0) = USB power up */
  97        __raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
  98        wmb();
  99}
 100
 101/******************************************************************************/
 102
 103static struct resource xxs1500_pcmcia_res[] = {
 104        {
 105                .name   = "pcmcia-io",
 106                .flags  = IORESOURCE_MEM,
 107                .start  = AU1000_PCMCIA_IO_PHYS_ADDR,
 108                .end    = AU1000_PCMCIA_IO_PHYS_ADDR + 0x000400000 - 1,
 109        },
 110        {
 111                .name   = "pcmcia-attr",
 112                .flags  = IORESOURCE_MEM,
 113                .start  = AU1000_PCMCIA_ATTR_PHYS_ADDR,
 114                .end    = AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
 115        },
 116        {
 117                .name   = "pcmcia-mem",
 118                .flags  = IORESOURCE_MEM,
 119                .start  = AU1000_PCMCIA_MEM_PHYS_ADDR,
 120                .end    = AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
 121        },
 122};
 123
 124static struct platform_device xxs1500_pcmcia_dev = {
 125        .name           = "xxs1500_pcmcia",
 126        .id             = -1,
 127        .num_resources  = ARRAY_SIZE(xxs1500_pcmcia_res),
 128        .resource       = xxs1500_pcmcia_res,
 129};
 130
 131static struct platform_device *xxs1500_devs[] __initdata = {
 132        &xxs1500_pcmcia_dev,
 133};
 134
 135static int __init xxs1500_dev_init(void)
 136{
 137        irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
 138        irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
 139        irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
 140        irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
 141        irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
 142        irq_set_irq_type(AU1500_GPIO207_INT, IRQ_TYPE_LEVEL_LOW);
 143
 144        irq_set_irq_type(AU1500_GPIO0_INT, IRQ_TYPE_LEVEL_LOW);
 145        irq_set_irq_type(AU1500_GPIO1_INT, IRQ_TYPE_LEVEL_LOW);
 146        irq_set_irq_type(AU1500_GPIO2_INT, IRQ_TYPE_LEVEL_LOW);
 147        irq_set_irq_type(AU1500_GPIO3_INT, IRQ_TYPE_LEVEL_LOW);
 148        irq_set_irq_type(AU1500_GPIO4_INT, IRQ_TYPE_LEVEL_LOW); /* CF irq */
 149        irq_set_irq_type(AU1500_GPIO5_INT, IRQ_TYPE_LEVEL_LOW);
 150
 151        return platform_add_devices(xxs1500_devs,
 152                                    ARRAY_SIZE(xxs1500_devs));
 153}
 154device_initcall(xxs1500_dev_init);
 155