LXR linux/arch/mips/alchemy/board-gpr.c

   1/*
   2 * GPR board platform device registration (Au1550)
   3 *
   4 * Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19 */
  20
  21#include <linux/delay.h>
  22#include <linux/init.h>
  23#include <linux/interrupt.h>
  24#include <linux/kernel.h>
  25#include <linux/platform_device.h>
  26#include <linux/pm.h>
  27#include <linux/mtd/partitions.h>
  28#include <linux/mtd/physmap.h>
  29#include <linux/leds.h>
  30#include <linux/gpio.h>
  31#include <linux/i2c.h>
  32#include <linux/i2c-gpio.h>
  33#include <linux/gpio/machine.h>
  34#include <asm/bootinfo.h>
  35#include <asm/idle.h>
  36#include <asm/reboot.h>
  37#include <asm/mach-au1x00/au1000.h>
  38#include <asm/mach-au1x00/gpio-au1000.h>
  39#include <prom.h>
  40
  41const char *get_system_type(void)
  42{
  43        return "GPR";
  44}
  45
  46void __init prom_init(void)
  47{
  48        unsigned char *memsize_str;
  49        unsigned long memsize;
  50
  51        prom_argc = fw_arg0;
  52        prom_argv = (char **)fw_arg1;
  53        prom_envp = (char **)fw_arg2;
  54
  55        prom_init_cmdline();
  56
  57        memsize_str = prom_getenv("memsize");
  58        if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  59                memsize = 0x04000000;
  60        add_memory_region(0, memsize, BOOT_MEM_RAM);
  61}
  62
  63void prom_putchar(unsigned char c)
  64{
  65        alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  66}
  67
  68static void gpr_reset(char *c)
  69{
  70        /* switch System-LED to orange (red# and green# on) */
  71        alchemy_gpio_direction_output(4, 0);
  72        alchemy_gpio_direction_output(5, 0);
  73
  74        /* trigger watchdog to reset board in 200ms */
  75        printk(KERN_EMERG "Triggering watchdog soft reset...\n");
  76        raw_local_irq_disable();
  77        alchemy_gpio_direction_output(1, 0);
  78        udelay(1);
  79        alchemy_gpio_set_value(1, 1);
  80        while (1)
  81                cpu_wait();
  82}
  83
  84static void gpr_power_off(void)
  85{
  86        while (1)
  87                cpu_wait();
  88}
  89
  90void __init board_setup(void)
  91{
  92        printk(KERN_INFO "Trapeze ITS GPR board\n");
  93
  94        pm_power_off = gpr_power_off;
  95        _machine_halt = gpr_power_off;
  96        _machine_restart = gpr_reset;
  97
  98        /* Enable UART1/3 */
  99        alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
 100        alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
 101
 102        /* Take away Reset of UMTS-card */
 103        alchemy_gpio_direction_output(215, 1);
 104}
 105
 106/*
 107 * Watchdog
 108 */
 109static struct resource gpr_wdt_resource[] = {
 110        [0] = {
 111                .start  = 1,
 112                .end    = 1,
 113                .name   = "gpr-adm6320-wdt",
 114                .flags  = IORESOURCE_IRQ,
 115        }
 116};
 117
 118static struct platform_device gpr_wdt_device = {
 119        .name = "adm6320-wdt",
 120        .id = 0,
 121        .num_resources = ARRAY_SIZE(gpr_wdt_resource),
 122        .resource = gpr_wdt_resource,
 123};
 124
 125/*
 126 * FLASH
 127 *
 128 * 0x00000000-0x00200000 : "kernel"
 129 * 0x00200000-0x00a00000 : "rootfs"
 130 * 0x01d00000-0x01f00000 : "config"
 131 * 0x01c00000-0x01d00000 : "yamon"
 132 * 0x01d00000-0x01d40000 : "yamon env vars"
 133 * 0x00000000-0x00a00000 : "kernel+rootfs"
 134 */
 135static struct mtd_partition gpr_mtd_partitions[] = {
 136        {
 137                .name   = "kernel",
 138                .size   = 0x00200000,
 139                .offset = 0,
 140        },
 141        {
 142                .name   = "rootfs",
 143                .size   = 0x00800000,
 144                .offset = MTDPART_OFS_APPEND,
 145                .mask_flags = MTD_WRITEABLE,
 146        },
 147        {
 148                .name   = "config",
 149                .size   = 0x00200000,
 150                .offset = 0x01d00000,
 151        },
 152        {
 153                .name   = "yamon",
 154                .size   = 0x00100000,
 155                .offset = 0x01c00000,
 156        },
 157        {
 158                .name   = "yamon env vars",
 159                .size   = 0x00040000,
 160                .offset = MTDPART_OFS_APPEND,
 161        },
 162        {
 163                .name   = "kernel+rootfs",
 164                .size   = 0x00a00000,
 165                .offset = 0,
 166        },
 167};
 168
 169static struct physmap_flash_data gpr_flash_data = {
 170        .width          = 4,
 171        .nr_parts       = ARRAY_SIZE(gpr_mtd_partitions),
 172        .parts          = gpr_mtd_partitions,
 173};
 174
 175static struct resource gpr_mtd_resource = {
 176        .start  = 0x1e000000,
 177        .end    = 0x1fffffff,
 178        .flags  = IORESOURCE_MEM,
 179};
 180
 181static struct platform_device gpr_mtd_device = {
 182        .name           = "physmap-flash",
 183        .dev            = {
 184                .platform_data  = &gpr_flash_data,
 185        },
 186        .num_resources  = 1,
 187        .resource       = &gpr_mtd_resource,
 188};
 189
 190/*
 191 * LEDs
 192 */
 193static const struct gpio_led gpr_gpio_leds[] = {
 194        {       /* green */
 195                .name                   = "gpr:green",
 196                .gpio                   = 4,
 197                .active_low             = 1,
 198        },
 199        {       /* red */
 200                .name                   = "gpr:red",
 201                .gpio                   = 5,
 202                .active_low             = 1,
 203        }
 204};
 205
 206static struct gpio_led_platform_data gpr_led_data = {
 207        .num_leds = ARRAY_SIZE(gpr_gpio_leds),
 208        .leds = gpr_gpio_leds,
 209};
 210
 211static struct platform_device gpr_led_devices = {
 212        .name = "leds-gpio",
 213        .id = -1,
 214        .dev = {
 215                .platform_data = &gpr_led_data,
 216        }
 217};
 218
 219/*
 220 * I2C
 221 */
 222static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
 223        .dev_id = "i2c-gpio",
 224        .table = {
 225                /*
 226                 * This should be on "GPIO2" which has base at 200 so
 227                 * the global numbers 209 and 210 should correspond to
 228                 * local offsets 9 and 10.
 229                 */
 230                GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
 231                                GPIO_ACTIVE_HIGH),
 232                GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
 233                                GPIO_ACTIVE_HIGH),
 234        },
 235};
 236
 237static struct i2c_gpio_platform_data gpr_i2c_data = {
 238        /*
 239         * The open drain mode is hardwired somewhere or an electrical
 240         * property of the alchemy GPIO controller.
 241         */
 242        .sda_is_open_drain      = 1,
 243        .scl_is_open_drain      = 1,
 244        .udelay                 = 2,            /* ~100 kHz */
 245        .timeout                = HZ,
 246};
 247
 248static struct platform_device gpr_i2c_device = {
 249        .name                   = "i2c-gpio",
 250        .id                     = -1,
 251        .dev.platform_data      = &gpr_i2c_data,
 252};
 253
 254static struct i2c_board_info gpr_i2c_info[] __initdata = {
 255        {
 256                I2C_BOARD_INFO("lm83", 0x18),
 257        }
 258};
 259
 260
 261
 262static struct resource alchemy_pci_host_res[] = {
 263        [0] = {
 264                .start  = AU1500_PCI_PHYS_ADDR,
 265                .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
 266                .flags  = IORESOURCE_MEM,
 267        },
 268};
 269
 270static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
 271{
 272        if ((slot == 0) && (pin == 1))
 273                return AU1550_PCI_INTA;
 274        else if ((slot == 0) && (pin == 2))
 275                return AU1550_PCI_INTB;
 276
 277        return 0xff;
 278}
 279
 280static struct alchemy_pci_platdata gpr_pci_pd = {
 281        .board_map_irq  = gpr_map_pci_irq,
 282        .pci_cfg_set    = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
 283                          PCI_CONFIG_CH |
 284#if defined(__MIPSEB__)
 285                          PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
 286#else
 287                          0,
 288#endif
 289};
 290
 291static struct platform_device gpr_pci_host_dev = {
 292        .dev.platform_data = &gpr_pci_pd,
 293        .name           = "alchemy-pci",
 294        .id             = 0,
 295        .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
 296        .resource       = alchemy_pci_host_res,
 297};
 298
 299static struct platform_device *gpr_devices[] __initdata = {
 300        &gpr_wdt_device,
 301        &gpr_mtd_device,
 302        &gpr_i2c_device,
 303        &gpr_led_devices,
 304};
 305
 306static int __init gpr_pci_init(void)
 307{
 308        return platform_device_register(&gpr_pci_host_dev);
 309}
 310/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
 311arch_initcall(gpr_pci_init);
 312
 313
 314static int __init gpr_dev_init(void)
 315{
 316        gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
 317        i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
 318
 319        return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
 320}
 321device_initcall(gpr_dev_init);
 322