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 #include <linux/gpio.h>
  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 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/flash.h>
  30
  31 #define FSG_SDA_PIN             12
  32 #define FSG_SCL_PIN             13
  33
  34 #define FSG_SB_GPIO             4       /* sync button */
  35 #define FSG_RB_GPIO             9       /* reset button */
  36 #define FSG_UB_GPIO             10      /* usb button */
  37
  38 static struct flash_platform_data fsg_flash_data = {
  39         .map_name               = "cfi_probe",
  40         .width                  = 2,
  41 };
  42
  43 static struct resource fsg_flash_resource = {
  44         .flags                  = IORESOURCE_MEM,
  45 };
  46
  47 static struct platform_device fsg_flash = {
  48         .name                   = "IXP4XX-Flash",
  49         .id                     = 0,
  50         .dev = {
  51                 .platform_data  = &fsg_flash_data,
  52         },
  53         .num_resources          = 1,
  54         .resource               = &fsg_flash_resource,
  55 };
  56
  57 static struct i2c_gpio_platform_data fsg_i2c_gpio_data = {
  58         .sda_pin                = FSG_SDA_PIN,
  59         .scl_pin                = FSG_SCL_PIN,
  60 };
  61
  62 static struct platform_device fsg_i2c_gpio = {
  63         .name                   = "i2c-gpio",
  64         .id                     = 0,
  65         .dev = {
  66                 .platform_data  = &fsg_i2c_gpio_data,
  67         },
  68 };
  69
  70 static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
  71         {
  72                 I2C_BOARD_INFO("isl1208", 0x6f),
  73         },
  74 };
  75
  76 static struct resource fsg_uart_resources[] = {
  77         {
  78                 .start          = IXP4XX_UART1_BASE_PHYS,
  79                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
  80                 .flags          = IORESOURCE_MEM,
  81         },
  82         {
  83                 .start          = IXP4XX_UART2_BASE_PHYS,
  84                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  85                 .flags          = IORESOURCE_MEM,
  86         }
  87 };
  88
  89 static struct plat_serial8250_port fsg_uart_data[] = {
  90         {
  91                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
  92                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
  93                 .irq            = IRQ_IXP4XX_UART1,
  94                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  95                 .iotype         = UPIO_MEM,
  96                 .regshift       = 2,
  97                 .uartclk        = IXP4XX_UART_XTAL,
  98         },
  99         {
 100                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
 101                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
 102                 .irq            = IRQ_IXP4XX_UART2,
 103                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 104                 .iotype         = UPIO_MEM,
 105                 .regshift       = 2,
 106                 .uartclk        = IXP4XX_UART_XTAL,
 107         },
 108         { }
 109 };
 110
 111 static struct platform_device fsg_uart = {
 112         .name                   = "serial8250",
 113         .id                     = PLAT8250_DEV_PLATFORM,
 114         .dev = {
 115                 .platform_data  = fsg_uart_data,
 116         },
 117         .num_resources          = ARRAY_SIZE(fsg_uart_resources),
 118         .resource               = fsg_uart_resources,
 119 };
 120
 121 static struct platform_device fsg_leds = {
 122         .name           = "fsg-led",
 123         .id             = -1,
 124 };
 125
 126 /* Built-in 10/100 Ethernet MAC interfaces */
 127 static struct eth_plat_info fsg_plat_eth[] = {
 128         {
 129                 .phy            = 5,
 130                 .rxq            = 3,
 131                 .txreadyq       = 20,
 132         }, {
 133                 .phy            = 4,
 134                 .rxq            = 4,
 135                 .txreadyq       = 21,
 136         }
 137 };
 138
 139 static struct platform_device fsg_eth[] = {
 140         {
 141                 .name                   = "ixp4xx_eth",
 142                 .id                     = IXP4XX_ETH_NPEB,
 143                 .dev = {
 144                         .platform_data  = fsg_plat_eth,
 145                 },
 146         }, {
 147                 .name                   = "ixp4xx_eth",
 148                 .id                     = IXP4XX_ETH_NPEC,
 149                 .dev = {
 150                         .platform_data  = fsg_plat_eth + 1,
 151                 },
 152         }
 153 };
 154
 155 static struct platform_device *fsg_devices[] __initdata = {
 156         &fsg_i2c_gpio,
 157         &fsg_flash,
 158         &fsg_leds,
 159         &fsg_eth[0],
 160         &fsg_eth[1],
 161 };
 162
 163 static irqreturn_t fsg_power_handler(int irq, void *dev_id)
 164 {
 165         /* Signal init to do the ctrlaltdel action, this will bypass init if
 166          * it hasn't started and do a kernel_restart.
 167          */
 168         ctrl_alt_del();
 169
 170         return IRQ_HANDLED;
 171 }
 172
 173 static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
 174 {
 175         /* This is the paper-clip reset which does an emergency reboot. */
 176         printk(KERN_INFO "Restarting system.\n");
 177         machine_restart(NULL);
 178
 179         /* This should never be reached. */
 180         return IRQ_HANDLED;
 181 }
 182
 183 static void __init fsg_init(void)
 184 {
 185         uint8_t __iomem *f;
 186
 187         ixp4xx_sys_init();
 188
 189         fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 190         fsg_flash_resource.end =
 191                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 192
 193         *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
 194         *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
 195
 196         /* Configure CS2 for operation, 8bit and writable */
 197         *IXP4XX_EXP_CS2 = 0xbfff0002;
 198
 199         i2c_register_board_info(0, fsg_i2c_board_info,
 200                                 ARRAY_SIZE(fsg_i2c_board_info));
 201
 202         /* This is only useful on a modified machine, but it is valuable
 203          * to have it first in order to see debug messages, and so that
 204          * it does *not* get removed if platform_add_devices fails!
 205          */
 206         (void)platform_device_register(&fsg_uart);
 207
 208         platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
 209
 210         if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
 211                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
 212                         "FSG reset button", NULL) < 0) {
 213
 214                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 215                         gpio_to_irq(FSG_RB_GPIO));
 216         }
 217
 218         if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
 219                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
 220                         "FSG power button", NULL) < 0) {
 221
 222                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 223                         gpio_to_irq(FSG_SB_GPIO));
 224         }
 225
 226         /*
 227          * Map in a portion of the flash and read the MAC addresses.
 228          * Since it is stored in BE in the flash itself, we need to
 229          * byteswap it if we're in LE mode.
 230          */
 231         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
 232         if (f) {
 233 #ifdef __ARMEB__
 234                 int i;
 235                 for (i = 0; i < 6; i++) {
 236                         fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
 237                         fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
 238                 }
 239 #else
 240
 241                 /*
 242                   Endian-swapped reads from unaligned addresses are
 243                   required to extract the two MACs from the big-endian
 244                   Redboot config area in flash.
 245                 */
 246
 247                 fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
 248                 fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
 249                 fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
 250                 fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
 251                 fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
 252                 fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
 253
 254                 fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
 255                 fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
 256                 fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
 257                 fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
 258                 fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
 259                 fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
 260 #endif
 261                 iounmap(f);
 262         }
 263         printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
 264                fsg_plat_eth[0].hwaddr);
 265         printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
 266                fsg_plat_eth[1].hwaddr);
 267
 268 }
 269
 270 MACHINE_START(FSG, "Freecom FSG-3")
 271         /* Maintainer: www.nslu2-linux.org */
 272         .map_io         = ixp4xx_map_io,
 273         .init_irq       = ixp4xx_init_irq,
 274         .timer          = &ixp4xx_timer,
 275         .atag_offset    = 0x100,
 276         .init_machine   = fsg_init,
 277 #if defined(CONFIG_PCI)
 278         .dma_zone_size  = SZ_64M,
 279 #endif
 280 MACHINE_END
 281