arch/mips/alchemy/board-xxs1500.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * BRIEF MODULE DESCRIPTION
   4  *      MyCable XXS1500 board support
   5  *
   6  * Copyright 2003, 2008 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc. <source@mvista.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/gpio.h>
  15 #include <linux/delay.h>
  16 #include <linux/pm.h>
  17 #include <asm/bootinfo.h>
  18 #include <asm/reboot.h>
  19 #include <asm/setup.h>
  20 #include <asm/mach-au1x00/au1000.h>
  21 #include <asm/mach-au1x00/gpio-au1000.h>
  22 #include <prom.h>
  23
  24 const char *get_system_type(void)
  25 {
  26         return "XXS1500";
  27 }
  28
  29 void __init prom_init(void)
  30 {
  31         unsigned char *memsize_str;
  32         unsigned long memsize;
  33
  34         prom_argc = fw_arg0;
  35         prom_argv = (char **)fw_arg1;
  36         prom_envp = (char **)fw_arg2;
  37
  38         prom_init_cmdline();
  39
  40         memsize_str = prom_getenv("memsize");
  41         if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  42                 memsize = 0x04000000;
  43
  44         add_memory_region(0, memsize, BOOT_MEM_RAM);
  45 }
  46
  47 void prom_putchar(char c)
  48 {
  49         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  50 }
  51
  52 static void xxs1500_reset(char *c)
  53 {
  54         /* Jump to the reset vector */
  55         __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
  56 }
  57
  58 static void xxs1500_power_off(void)
  59 {
  60         while (1)
  61                 asm volatile (
  62                 "       .set    mips32                                  \n"
  63                 "       wait                                            \n"
  64                 "       .set    mips0                                   \n");
  65 }
  66
  67 void __init board_setup(void)
  68 {
  69         u32 pin_func;
  70
  71         pm_power_off = xxs1500_power_off;
  72         _machine_halt = xxs1500_power_off;
  73         _machine_restart = xxs1500_reset;
  74
  75         alchemy_gpio1_input_enable();
  76         alchemy_gpio2_enable();
  77
  78         /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
  79         pin_func  = alchemy_rdsys(AU1000_SYS_PINFUNC) & ~SYS_PF_UR3;
  80         pin_func |= SYS_PF_UR3;
  81         alchemy_wrsys(pin_func, AU1000_SYS_PINFUNC);
  82
  83         /* Enable UART */
  84         alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
  85         /* Enable DTR (MCR bit 0) = USB power up */
  86         __raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
  87         wmb();
  88 }
  89
  90 /******************************************************************************/
  91
  92 static struct resource xxs1500_pcmcia_res[] = {
  93         {
  94                 .name   = "pcmcia-io",
  95                 .flags  = IORESOURCE_MEM,
  96                 .start  = AU1000_PCMCIA_IO_PHYS_ADDR,
  97                 .end    = AU1000_PCMCIA_IO_PHYS_ADDR + 0x000400000 - 1,
  98         },
  99         {
 100                 .name   = "pcmcia-attr",
 101                 .flags  = IORESOURCE_MEM,
 102                 .start  = AU1000_PCMCIA_ATTR_PHYS_ADDR,
 103                 .end    = AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
 104         },
 105         {
 106                 .name   = "pcmcia-mem",
 107                 .flags  = IORESOURCE_MEM,
 108                 .start  = AU1000_PCMCIA_MEM_PHYS_ADDR,
 109                 .end    = AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
 110         },
 111 };
 112
 113 static struct platform_device xxs1500_pcmcia_dev = {
 114         .name           = "xxs1500_pcmcia",
 115         .id             = -1,
 116         .num_resources  = ARRAY_SIZE(xxs1500_pcmcia_res),
 117         .resource       = xxs1500_pcmcia_res,
 118 };
 119
 120 static struct platform_device *xxs1500_devs[] __initdata = {
 121         &xxs1500_pcmcia_dev,
 122 };
 123
 124 static int __init xxs1500_dev_init(void)
 125 {
 126         irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
 127         irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
 128         irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
 129         irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
 130         irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
 131         irq_set_irq_type(AU1500_GPIO207_INT, IRQ_TYPE_LEVEL_LOW);
 132
 133         irq_set_irq_type(AU1500_GPIO0_INT, IRQ_TYPE_LEVEL_LOW);
 134         irq_set_irq_type(AU1500_GPIO1_INT, IRQ_TYPE_LEVEL_LOW);
 135         irq_set_irq_type(AU1500_GPIO2_INT, IRQ_TYPE_LEVEL_LOW);
 136         irq_set_irq_type(AU1500_GPIO3_INT, IRQ_TYPE_LEVEL_LOW);
 137         irq_set_irq_type(AU1500_GPIO4_INT, IRQ_TYPE_LEVEL_LOW); /* CF irq */
 138         irq_set_irq_type(AU1500_GPIO5_INT, IRQ_TYPE_LEVEL_LOW);
 139
 140         return platform_add_devices(xxs1500_devs,
 141                                     ARRAY_SIZE(xxs1500_devs));
 142 }
 143 device_initcall(xxs1500_dev_init);