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
  35 const char *get_system_type(void)
  36 {
  37         return "XXS1500";
  38 }
  39
  40 void __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
  58 void prom_putchar(unsigned char c)
  59 {
  60         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  61 }
  62
  63 static void xxs1500_reset(char *c)
  64 {
  65         /* Jump to the reset vector */
  66         __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
  67 }
  68
  69 static 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
  78 void __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
 103 static 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
 124 static 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
 131 static struct platform_device *xxs1500_devs[] __initdata = {
 132         &xxs1500_pcmcia_dev,
 133 };
 134
 135 static 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 }
 154 device_initcall(xxs1500_dev_init);