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

   1 /*
   2  * arch/arm/mach-ixp4xx/fsg-setup.c
   3  *
   4  * FSG board-setup
   5  *
   6  * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
   7  *
   8  * based on ixdp425-setup.c:
   9  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
  10  * based on nslu2-power.c
  11  *      Copyright (C) 2005 Tower Technologies
  12  *
  13  * Author: Rod Whitby <rod@whitby.id.au>
  14  * Maintainers: http://www.nslu2-linux.org/
  15  *
  16  */
  17
  18 #include <linux/if_ether.h>
  19 #include <linux/irq.h>
  20 #include <linux/serial.h>
  21 #include <linux/serial_8250.h>
  22 #include <linux/leds.h>
  23 #include <linux/reboot.h>
  24 #include <linux/i2c.h>
  25 #include <linux/i2c-gpio.h>
  26 #include <linux/io.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/flash.h>
  31 #include <asm/gpio.h>
  32
  33 static struct flash_platform_data fsg_flash_data = {
  34         .map_name               = "cfi_probe",
  35         .width                  = 2,
  36 };
  37
  38 static struct resource fsg_flash_resource = {
  39         .flags                  = IORESOURCE_MEM,
  40 };
  41
  42 static struct platform_device fsg_flash = {
  43         .name                   = "IXP4XX-Flash",
  44         .id                     = 0,
  45         .dev = {
  46                 .platform_data  = &fsg_flash_data,
  47         },
  48         .num_resources          = 1,
  49         .resource               = &fsg_flash_resource,
  50 };
  51
  52 static struct i2c_gpio_platform_data fsg_i2c_gpio_data = {
  53         .sda_pin                = FSG_SDA_PIN,
  54         .scl_pin                = FSG_SCL_PIN,
  55 };
  56
  57 static struct platform_device fsg_i2c_gpio = {
  58         .name                   = "i2c-gpio",
  59         .id                     = 0,
  60         .dev = {
  61                 .platform_data  = &fsg_i2c_gpio_data,
  62         },
  63 };
  64
  65 static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
  66         {
  67                 I2C_BOARD_INFO("isl1208", 0x6f),
  68         },
  69 };
  70
  71 static struct resource fsg_uart_resources[] = {
  72         {
  73                 .start          = IXP4XX_UART1_BASE_PHYS,
  74                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
  75                 .flags          = IORESOURCE_MEM,
  76         },
  77         {
  78                 .start          = IXP4XX_UART2_BASE_PHYS,
  79                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  80                 .flags          = IORESOURCE_MEM,
  81         }
  82 };
  83
  84 static struct plat_serial8250_port fsg_uart_data[] = {
  85         {
  86                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
  87                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
  88                 .irq            = IRQ_IXP4XX_UART1,
  89                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  90                 .iotype         = UPIO_MEM,
  91                 .regshift       = 2,
  92                 .uartclk        = IXP4XX_UART_XTAL,
  93         },
  94         {
  95                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
  96                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
  97                 .irq            = IRQ_IXP4XX_UART2,
  98                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  99                 .iotype         = UPIO_MEM,
 100                 .regshift       = 2,
 101                 .uartclk        = IXP4XX_UART_XTAL,
 102         },
 103         { }
 104 };
 105
 106 static struct platform_device fsg_uart = {
 107         .name                   = "serial8250",
 108         .id                     = PLAT8250_DEV_PLATFORM,
 109         .dev = {
 110                 .platform_data  = fsg_uart_data,
 111         },
 112         .num_resources          = ARRAY_SIZE(fsg_uart_resources),
 113         .resource               = fsg_uart_resources,
 114 };
 115
 116 static struct platform_device fsg_leds = {
 117         .name           = "fsg-led",
 118         .id             = -1,
 119 };
 120
 121 /* Built-in 10/100 Ethernet MAC interfaces */
 122 static struct eth_plat_info fsg_plat_eth[] = {
 123         {
 124                 .phy            = 5,
 125                 .rxq            = 3,
 126                 .txreadyq       = 20,
 127         }, {
 128                 .phy            = 4,
 129                 .rxq            = 4,
 130                 .txreadyq       = 21,
 131         }
 132 };
 133
 134 static struct platform_device fsg_eth[] = {
 135         {
 136                 .name                   = "ixp4xx_eth",
 137                 .id                     = IXP4XX_ETH_NPEB,
 138                 .dev = {
 139                         .platform_data  = fsg_plat_eth,
 140                 },
 141         }, {
 142                 .name                   = "ixp4xx_eth",
 143                 .id                     = IXP4XX_ETH_NPEC,
 144                 .dev = {
 145                         .platform_data  = fsg_plat_eth + 1,
 146                 },
 147         }
 148 };
 149
 150 static struct platform_device *fsg_devices[] __initdata = {
 151         &fsg_i2c_gpio,
 152         &fsg_flash,
 153         &fsg_leds,
 154         &fsg_eth[0],
 155         &fsg_eth[1],
 156 };
 157
 158 static irqreturn_t fsg_power_handler(int irq, void *dev_id)
 159 {
 160         /* Signal init to do the ctrlaltdel action, this will bypass init if
 161          * it hasn't started and do a kernel_restart.
 162          */
 163         ctrl_alt_del();
 164
 165         return IRQ_HANDLED;
 166 }
 167
 168 static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
 169 {
 170         /* This is the paper-clip reset which does an emergency reboot. */
 171         printk(KERN_INFO "Restarting system.\n");
 172         machine_restart(NULL);
 173
 174         /* This should never be reached. */
 175         return IRQ_HANDLED;
 176 }
 177
 178 static void __init fsg_init(void)
 179 {
 180         uint8_t __iomem *f;
 181
 182         ixp4xx_sys_init();
 183
 184         fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 185         fsg_flash_resource.end =
 186                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 187
 188         *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
 189         *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
 190
 191         /* Configure CS2 for operation, 8bit and writable */
 192         *IXP4XX_EXP_CS2 = 0xbfff0002;
 193
 194         i2c_register_board_info(0, fsg_i2c_board_info,
 195                                 ARRAY_SIZE(fsg_i2c_board_info));
 196
 197         /* This is only useful on a modified machine, but it is valuable
 198          * to have it first in order to see debug messages, and so that
 199          * it does *not* get removed if platform_add_devices fails!
 200          */
 201         (void)platform_device_register(&fsg_uart);
 202
 203         platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
 204
 205         if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
 206                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
 207                         "FSG reset button", NULL) < 0) {
 208
 209                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 210                         gpio_to_irq(FSG_RB_GPIO));
 211         }
 212
 213         if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
 214                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
 215                         "FSG power button", NULL) < 0) {
 216
 217                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 218                         gpio_to_irq(FSG_SB_GPIO));
 219         }
 220
 221         /*
 222          * Map in a portion of the flash and read the MAC addresses.
 223          * Since it is stored in BE in the flash itself, we need to
 224          * byteswap it if we're in LE mode.
 225          */
 226         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
 227         if (f) {
 228 #ifdef __ARMEB__
 229                 int i;
 230                 for (i = 0; i < 6; i++) {
 231                         fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
 232                         fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
 233                 }
 234 #else
 235
 236                 /*
 237                   Endian-swapped reads from unaligned addresses are
 238                   required to extract the two MACs from the big-endian
 239                   Redboot config area in flash.
 240                 */
 241
 242                 fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
 243                 fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
 244                 fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
 245                 fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
 246                 fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
 247                 fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
 248
 249                 fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
 250                 fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
 251                 fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
 252                 fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
 253                 fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
 254                 fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
 255 #endif
 256                 iounmap(f);
 257         }
 258         printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
 259                fsg_plat_eth[0].hwaddr);
 260         printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
 261                fsg_plat_eth[1].hwaddr);
 262
 263 }
 264
 265 MACHINE_START(FSG, "Freecom FSG-3")
 266         /* Maintainer: www.nslu2-linux.org */
 267         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
 268         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc,
 269         .map_io         = ixp4xx_map_io,
 270         .init_irq       = ixp4xx_init_irq,
 271         .timer          = &ixp4xx_timer,
 272         .boot_params    = 0x0100,
 273         .init_machine   = fsg_init,
 274 MACHINE_END
 275