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 <asm/bootinfo.h>
  34 #include <asm/idle.h>
  35 #include <asm/reboot.h>
  36 #include <asm/mach-au1x00/au1000.h>
  37 #include <prom.h>
  38
  39 const char *get_system_type(void)
  40 {
  41         return "GPR";
  42 }
  43
  44 void __init prom_init(void)
  45 {
  46         unsigned char *memsize_str;
  47         unsigned long memsize;
  48
  49         prom_argc = fw_arg0;
  50         prom_argv = (char **)fw_arg1;
  51         prom_envp = (char **)fw_arg2;
  52
  53         prom_init_cmdline();
  54
  55         memsize_str = prom_getenv("memsize");
  56         if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  57                 memsize = 0x04000000;
  58         add_memory_region(0, memsize, BOOT_MEM_RAM);
  59 }
  60
  61 void prom_putchar(unsigned char c)
  62 {
  63         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  64 }
  65
  66 static void gpr_reset(char *c)
  67 {
  68         /* switch System-LED to orange (red# and green# on) */
  69         alchemy_gpio_direction_output(4, 0);
  70         alchemy_gpio_direction_output(5, 0);
  71
  72         /* trigger watchdog to reset board in 200ms */
  73         printk(KERN_EMERG "Triggering watchdog soft reset...\n");
  74         raw_local_irq_disable();
  75         alchemy_gpio_direction_output(1, 0);
  76         udelay(1);
  77         alchemy_gpio_set_value(1, 1);
  78         while (1)
  79                 cpu_wait();
  80 }
  81
  82 static void gpr_power_off(void)
  83 {
  84         while (1)
  85                 cpu_wait();
  86 }
  87
  88 void __init board_setup(void)
  89 {
  90         printk(KERN_INFO "Trapeze ITS GPR board\n");
  91
  92         pm_power_off = gpr_power_off;
  93         _machine_halt = gpr_power_off;
  94         _machine_restart = gpr_reset;
  95
  96         /* Enable UART1/3 */
  97         alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
  98         alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
  99
 100         /* Take away Reset of UMTS-card */
 101         alchemy_gpio_direction_output(215, 1);
 102 }
 103
 104 /*
 105  * Watchdog
 106  */
 107 static struct resource gpr_wdt_resource[] = {
 108         [0] = {
 109                 .start  = 1,
 110                 .end    = 1,
 111                 .name   = "gpr-adm6320-wdt",
 112                 .flags  = IORESOURCE_IRQ,
 113         }
 114 };
 115
 116 static struct platform_device gpr_wdt_device = {
 117         .name = "adm6320-wdt",
 118         .id = 0,
 119         .num_resources = ARRAY_SIZE(gpr_wdt_resource),
 120         .resource = gpr_wdt_resource,
 121 };
 122
 123 /*
 124  * FLASH
 125  *
 126  * 0x00000000-0x00200000 : "kernel"
 127  * 0x00200000-0x00a00000 : "rootfs"
 128  * 0x01d00000-0x01f00000 : "config"
 129  * 0x01c00000-0x01d00000 : "yamon"
 130  * 0x01d00000-0x01d40000 : "yamon env vars"
 131  * 0x00000000-0x00a00000 : "kernel+rootfs"
 132  */
 133 static struct mtd_partition gpr_mtd_partitions[] = {
 134         {
 135                 .name   = "kernel",
 136                 .size   = 0x00200000,
 137                 .offset = 0,
 138         },
 139         {
 140                 .name   = "rootfs",
 141                 .size   = 0x00800000,
 142                 .offset = MTDPART_OFS_APPEND,
 143                 .mask_flags = MTD_WRITEABLE,
 144         },
 145         {
 146                 .name   = "config",
 147                 .size   = 0x00200000,
 148                 .offset = 0x01d00000,
 149         },
 150         {
 151                 .name   = "yamon",
 152                 .size   = 0x00100000,
 153                 .offset = 0x01c00000,
 154         },
 155         {
 156                 .name   = "yamon env vars",
 157                 .size   = 0x00040000,
 158                 .offset = MTDPART_OFS_APPEND,
 159         },
 160         {
 161                 .name   = "kernel+rootfs",
 162                 .size   = 0x00a00000,
 163                 .offset = 0,
 164         },
 165 };
 166
 167 static struct physmap_flash_data gpr_flash_data = {
 168         .width          = 4,
 169         .nr_parts       = ARRAY_SIZE(gpr_mtd_partitions),
 170         .parts          = gpr_mtd_partitions,
 171 };
 172
 173 static struct resource gpr_mtd_resource = {
 174         .start  = 0x1e000000,
 175         .end    = 0x1fffffff,
 176         .flags  = IORESOURCE_MEM,
 177 };
 178
 179 static struct platform_device gpr_mtd_device = {
 180         .name           = "physmap-flash",
 181         .dev            = {
 182                 .platform_data  = &gpr_flash_data,
 183         },
 184         .num_resources  = 1,
 185         .resource       = &gpr_mtd_resource,
 186 };
 187
 188 /*
 189  * LEDs
 190  */
 191 static struct gpio_led gpr_gpio_leds[] = {
 192         {       /* green */
 193                 .name                   = "gpr:green",
 194                 .gpio                   = 4,
 195                 .active_low             = 1,
 196         },
 197         {       /* red */
 198                 .name                   = "gpr:red",
 199                 .gpio                   = 5,
 200                 .active_low             = 1,
 201         }
 202 };
 203
 204 static struct gpio_led_platform_data gpr_led_data = {
 205         .num_leds = ARRAY_SIZE(gpr_gpio_leds),
 206         .leds = gpr_gpio_leds,
 207 };
 208
 209 static struct platform_device gpr_led_devices = {
 210         .name = "leds-gpio",
 211         .id = -1,
 212         .dev = {
 213                 .platform_data = &gpr_led_data,
 214         }
 215 };
 216
 217 /*
 218  * I2C
 219  */
 220 static struct i2c_gpio_platform_data gpr_i2c_data = {
 221         .sda_pin                = 209,
 222         .sda_is_open_drain      = 1,
 223         .scl_pin                = 210,
 224         .scl_is_open_drain      = 1,
 225         .udelay                 = 2,            /* ~100 kHz */
 226         .timeout                = HZ,
 227 };
 228
 229 static struct platform_device gpr_i2c_device = {
 230         .name                   = "i2c-gpio",
 231         .id                     = -1,
 232         .dev.platform_data      = &gpr_i2c_data,
 233 };
 234
 235 static struct i2c_board_info gpr_i2c_info[] __initdata = {
 236         {
 237                 I2C_BOARD_INFO("lm83", 0x18),
 238                 .type = "lm83"
 239         }
 240 };
 241
 242
 243
 244 static struct resource alchemy_pci_host_res[] = {
 245         [0] = {
 246                 .start  = AU1500_PCI_PHYS_ADDR,
 247                 .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
 248                 .flags  = IORESOURCE_MEM,
 249         },
 250 };
 251
 252 static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
 253 {
 254         if ((slot == 0) && (pin == 1))
 255                 return AU1550_PCI_INTA;
 256         else if ((slot == 0) && (pin == 2))
 257                 return AU1550_PCI_INTB;
 258
 259         return 0xff;
 260 }
 261
 262 static struct alchemy_pci_platdata gpr_pci_pd = {
 263         .board_map_irq  = gpr_map_pci_irq,
 264         .pci_cfg_set    = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
 265                           PCI_CONFIG_CH |
 266 #if defined(__MIPSEB__)
 267                           PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
 268 #else
 269                           0,
 270 #endif
 271 };
 272
 273 static struct platform_device gpr_pci_host_dev = {
 274         .dev.platform_data = &gpr_pci_pd,
 275         .name           = "alchemy-pci",
 276         .id             = 0,
 277         .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
 278         .resource       = alchemy_pci_host_res,
 279 };
 280
 281 static struct platform_device *gpr_devices[] __initdata = {
 282         &gpr_wdt_device,
 283         &gpr_mtd_device,
 284         &gpr_i2c_device,
 285         &gpr_led_devices,
 286 };
 287
 288 static int __init gpr_pci_init(void)
 289 {
 290         return platform_device_register(&gpr_pci_host_dev);
 291 }
 292 /* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
 293 arch_initcall(gpr_pci_init);
 294
 295
 296 static int __init gpr_dev_init(void)
 297 {
 298         i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
 299
 300         return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
 301 }
 302 device_initcall(gpr_dev_init);