arch/arm/mach-ixp4xx/dsmg600-setup.c

   1 /*
   2  * DSM-G600 board-setup
   3  *
   4  * Copyright (C) 2006 Tower Technologies
   5  * Author: Alessandro Zummo <a.zummo@towertech.it>
   6  *
   7  * based ixdp425-setup.c:
   8  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
   9  *
  10  * Author: Alessandro Zummo <a.zummo@towertech.it>
  11  * Maintainers: http://www.nslu2-linux.org/
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/serial.h>
  16 #include <linux/serial_8250.h>
  17
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/flash.h>
  21
  22 static struct flash_platform_data dsmg600_flash_data = {
  23         .map_name               = "cfi_probe",
  24         .width                  = 2,
  25 };
  26
  27 static struct resource dsmg600_flash_resource = {
  28         .flags                  = IORESOURCE_MEM,
  29 };
  30
  31 static struct platform_device dsmg600_flash = {
  32         .name                   = "IXP4XX-Flash",
  33         .id                     = 0,
  34         .dev.platform_data      = &dsmg600_flash_data,
  35         .num_resources          = 1,
  36         .resource               = &dsmg600_flash_resource,
  37 };
  38
  39 static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = {
  40         .sda_pin                = DSMG600_SDA_PIN,
  41         .scl_pin                = DSMG600_SCL_PIN,
  42 };
  43
  44 static struct platform_device dsmg600_i2c_controller = {
  45         .name                   = "IXP4XX-I2C",
  46         .id                     = 0,
  47         .dev.platform_data      = &dsmg600_i2c_gpio_pins,
  48 };
  49
  50 #ifdef CONFIG_LEDS_CLASS
  51 static struct resource dsmg600_led_resources[] = {
  52         {
  53                 .name           = "power",
  54                 .start          = DSMG600_LED_PWR_GPIO,
  55                 .end            = DSMG600_LED_PWR_GPIO,
  56                 .flags          = IXP4XX_GPIO_HIGH,
  57         },
  58         {
  59                 .name           = "wlan",
  60                 .start          = DSMG600_LED_WLAN_GPIO,
  61                 .end            = DSMG600_LED_WLAN_GPIO,
  62                 .flags          = IXP4XX_GPIO_LOW,
  63         },
  64 };
  65
  66 static struct platform_device dsmg600_leds = {
  67         .name                   = "IXP4XX-GPIO-LED",
  68         .id                     = -1,
  69         .num_resources          = ARRAY_SIZE(dsmg600_led_resources),
  70         .resource               = dsmg600_led_resources,
  71 };
  72 #endif
  73
  74 static struct resource dsmg600_uart_resources[] = {
  75         {
  76                 .start          = IXP4XX_UART1_BASE_PHYS,
  77                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
  78                 .flags          = IORESOURCE_MEM,
  79         },
  80         {
  81                 .start          = IXP4XX_UART2_BASE_PHYS,
  82                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  83                 .flags          = IORESOURCE_MEM,
  84         }
  85 };
  86
  87 static struct plat_serial8250_port dsmg600_uart_data[] = {
  88         {
  89                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
  90                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
  91                 .irq            = IRQ_IXP4XX_UART1,
  92                 .flags          = UPF_BOOT_AUTOCONF,
  93                 .iotype         = UPIO_MEM,
  94                 .regshift       = 2,
  95                 .uartclk        = IXP4XX_UART_XTAL,
  96         },
  97         {
  98                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
  99                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 100                 .irq            = IRQ_IXP4XX_UART2,
 101                 .flags          = UPF_BOOT_AUTOCONF,
 102                 .iotype         = UPIO_MEM,
 103                 .regshift       = 2,
 104                 .uartclk        = IXP4XX_UART_XTAL,
 105         },
 106         { }
 107 };
 108
 109 static struct platform_device dsmg600_uart = {
 110         .name                   = "serial8250",
 111         .id                     = PLAT8250_DEV_PLATFORM,
 112         .dev.platform_data      = dsmg600_uart_data,
 113         .num_resources          = ARRAY_SIZE(dsmg600_uart_resources),
 114         .resource               = dsmg600_uart_resources,
 115 };
 116
 117 static struct platform_device *dsmg600_devices[] __initdata = {
 118         &dsmg600_i2c_controller,
 119         &dsmg600_flash,
 120 };
 121
 122 static void dsmg600_power_off(void)
 123 {
 124         /* enable the pwr cntl gpio */
 125         gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);
 126
 127         /* poweroff */
 128         gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
 129 }
 130
 131 static void __init dsmg600_init(void)
 132 {
 133         ixp4xx_sys_init();
 134
 135         /* Make sure that GPIO14 and GPIO15 are not used as clocks */
 136         *IXP4XX_GPIO_GPCLKR = 0;
 137
 138         dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 139         dsmg600_flash_resource.end =
 140                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 141
 142         pm_power_off = dsmg600_power_off;
 143
 144         /* The UART is required on the DSM-G600 (Redboot cannot use the
 145          * NIC) -- do it here so that it does *not* get removed if
 146          * platform_add_devices fails!
 147          */
 148         (void)platform_device_register(&dsmg600_uart);
 149
 150         platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
 151
 152 #ifdef CONFIG_LEDS_CLASS
 153         /* We don't care whether or not this works. */
 154         (void)platform_device_register(&dsmg600_leds);
 155 #endif
 156 }
 157
 158 static void __init dsmg600_fixup(struct machine_desc *desc,
 159                 struct tag *tags, char **cmdline, struct meminfo *mi)
 160 {
 161        /* The xtal on this machine is non-standard. */
 162         ixp4xx_timer_freq = DSMG600_FREQ;
 163 }
 164
 165 MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
 166         /* Maintainer: www.nslu2-linux.org */
 167         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
 168         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
 169         .boot_params    = 0x00000100,
 170         .fixup          = dsmg600_fixup,
 171         .map_io         = ixp4xx_map_io,
 172         .init_irq       = ixp4xx_init_irq,
 173         .timer          = &ixp4xx_timer,
 174         .init_machine   = dsmg600_init,
 175 MACHINE_END