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
  41 const char *get_system_type(void)
  42 {
  43         return "GPR";
  44 }
  45
  46 void __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
  63 void prom_putchar(unsigned char c)
  64 {
  65         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  66 }
  67
  68 static 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
  84 static void gpr_power_off(void)
  85 {
  86         while (1)
  87                 cpu_wait();
  88 }
  89
  90 void __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  */
 109 static 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
 118 static 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  */
 135 static 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
 169 static 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
 175 static struct resource gpr_mtd_resource = {
 176         .start  = 0x1e000000,
 177         .end    = 0x1fffffff,
 178         .flags  = IORESOURCE_MEM,
 179 };
 180
 181 static 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  */
 193 static 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
 206 static struct gpio_led_platform_data gpr_led_data = {
 207         .num_leds = ARRAY_SIZE(gpr_gpio_leds),
 208         .leds = gpr_gpio_leds,
 209 };
 210
 211 static 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  */
 222 static 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
 237 static 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
 248 static struct platform_device gpr_i2c_device = {
 249         .name                   = "i2c-gpio",
 250         .id                     = -1,
 251         .dev.platform_data      = &gpr_i2c_data,
 252 };
 253
 254 static struct i2c_board_info gpr_i2c_info[] __initdata = {
 255         {
 256                 I2C_BOARD_INFO("lm83", 0x18),
 257         }
 258 };
 259
 260
 261
 262 static 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
 270 static 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
 280 static 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
 291 static 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
 299 static struct platform_device *gpr_devices[] __initdata = {
 300         &gpr_wdt_device,
 301         &gpr_mtd_device,
 302         &gpr_i2c_device,
 303         &gpr_led_devices,
 304 };
 305
 306 static 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 */
 311 arch_initcall(gpr_pci_init);
 312
 313
 314 static 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 }
 321 device_initcall(gpr_dev_init);