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/platform_data/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/setup.h>
  38 #include <asm/mach-au1x00/au1000.h>
  39 #include <asm/mach-au1x00/gpio-au1000.h>
  40 #include <prom.h>
  41
  42 const char *get_system_type(void)
  43 {
  44         return "GPR";
  45 }
  46
  47 void __init prom_init(void)
  48 {
  49         unsigned char *memsize_str;
  50         unsigned long memsize;
  51
  52         prom_argc = fw_arg0;
  53         prom_argv = (char **)fw_arg1;
  54         prom_envp = (char **)fw_arg2;
  55
  56         prom_init_cmdline();
  57
  58         memsize_str = prom_getenv("memsize");
  59         if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
  60                 memsize = 0x04000000;
  61         add_memory_region(0, memsize, BOOT_MEM_RAM);
  62 }
  63
  64 void prom_putchar(char c)
  65 {
  66         alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
  67 }
  68
  69 static void gpr_reset(char *c)
  70 {
  71         /* switch System-LED to orange (red# and green# on) */
  72         alchemy_gpio_direction_output(4, 0);
  73         alchemy_gpio_direction_output(5, 0);
  74
  75         /* trigger watchdog to reset board in 200ms */
  76         printk(KERN_EMERG "Triggering watchdog soft reset...\n");
  77         raw_local_irq_disable();
  78         alchemy_gpio_direction_output(1, 0);
  79         udelay(1);
  80         alchemy_gpio_set_value(1, 1);
  81         while (1)
  82                 cpu_wait();
  83 }
  84
  85 static void gpr_power_off(void)
  86 {
  87         while (1)
  88                 cpu_wait();
  89 }
  90
  91 void __init board_setup(void)
  92 {
  93         printk(KERN_INFO "Trapeze ITS GPR board\n");
  94
  95         pm_power_off = gpr_power_off;
  96         _machine_halt = gpr_power_off;
  97         _machine_restart = gpr_reset;
  98
  99         /* Enable UART1/3 */
 100         alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
 101         alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
 102
 103         /* Take away Reset of UMTS-card */
 104         alchemy_gpio_direction_output(215, 1);
 105 }
 106
 107 /*
 108  * Watchdog
 109  */
 110 static struct resource gpr_wdt_resource[] = {
 111         [0] = {
 112                 .start  = 1,
 113                 .end    = 1,
 114                 .name   = "gpr-adm6320-wdt",
 115                 .flags  = IORESOURCE_IRQ,
 116         }
 117 };
 118
 119 static struct platform_device gpr_wdt_device = {
 120         .name = "adm6320-wdt",
 121         .id = 0,
 122         .num_resources = ARRAY_SIZE(gpr_wdt_resource),
 123         .resource = gpr_wdt_resource,
 124 };
 125
 126 /*
 127  * FLASH
 128  *
 129  * 0x00000000-0x00200000 : "kernel"
 130  * 0x00200000-0x00a00000 : "rootfs"
 131  * 0x01d00000-0x01f00000 : "config"
 132  * 0x01c00000-0x01d00000 : "yamon"
 133  * 0x01d00000-0x01d40000 : "yamon env vars"
 134  * 0x00000000-0x00a00000 : "kernel+rootfs"
 135  */
 136 static struct mtd_partition gpr_mtd_partitions[] = {
 137         {
 138                 .name   = "kernel",
 139                 .size   = 0x00200000,
 140                 .offset = 0,
 141         },
 142         {
 143                 .name   = "rootfs",
 144                 .size   = 0x00800000,
 145                 .offset = MTDPART_OFS_APPEND,
 146                 .mask_flags = MTD_WRITEABLE,
 147         },
 148         {
 149                 .name   = "config",
 150                 .size   = 0x00200000,
 151                 .offset = 0x01d00000,
 152         },
 153         {
 154                 .name   = "yamon",
 155                 .size   = 0x00100000,
 156                 .offset = 0x01c00000,
 157         },
 158         {
 159                 .name   = "yamon env vars",
 160                 .size   = 0x00040000,
 161                 .offset = MTDPART_OFS_APPEND,
 162         },
 163         {
 164                 .name   = "kernel+rootfs",
 165                 .size   = 0x00a00000,
 166                 .offset = 0,
 167         },
 168 };
 169
 170 static struct physmap_flash_data gpr_flash_data = {
 171         .width          = 4,
 172         .nr_parts       = ARRAY_SIZE(gpr_mtd_partitions),
 173         .parts          = gpr_mtd_partitions,
 174 };
 175
 176 static struct resource gpr_mtd_resource = {
 177         .start  = 0x1e000000,
 178         .end    = 0x1fffffff,
 179         .flags  = IORESOURCE_MEM,
 180 };
 181
 182 static struct platform_device gpr_mtd_device = {
 183         .name           = "physmap-flash",
 184         .dev            = {
 185                 .platform_data  = &gpr_flash_data,
 186         },
 187         .num_resources  = 1,
 188         .resource       = &gpr_mtd_resource,
 189 };
 190
 191 /*
 192  * LEDs
 193  */
 194 static const struct gpio_led gpr_gpio_leds[] = {
 195         {       /* green */
 196                 .name                   = "gpr:green",
 197                 .gpio                   = 4,
 198                 .active_low             = 1,
 199         },
 200         {       /* red */
 201                 .name                   = "gpr:red",
 202                 .gpio                   = 5,
 203                 .active_low             = 1,
 204         }
 205 };
 206
 207 static struct gpio_led_platform_data gpr_led_data = {
 208         .num_leds = ARRAY_SIZE(gpr_gpio_leds),
 209         .leds = gpr_gpio_leds,
 210 };
 211
 212 static struct platform_device gpr_led_devices = {
 213         .name = "leds-gpio",
 214         .id = -1,
 215         .dev = {
 216                 .platform_data = &gpr_led_data,
 217         }
 218 };
 219
 220 /*
 221  * I2C
 222  */
 223 static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
 224         .dev_id = "i2c-gpio",
 225         .table = {
 226                 /*
 227                  * This should be on "GPIO2" which has base at 200 so
 228                  * the global numbers 209 and 210 should correspond to
 229                  * local offsets 9 and 10.
 230                  */
 231                 GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
 232                                 GPIO_ACTIVE_HIGH),
 233                 GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
 234                                 GPIO_ACTIVE_HIGH),
 235         },
 236 };
 237
 238 static struct i2c_gpio_platform_data gpr_i2c_data = {
 239         /*
 240          * The open drain mode is hardwired somewhere or an electrical
 241          * property of the alchemy GPIO controller.
 242          */
 243         .sda_is_open_drain      = 1,
 244         .scl_is_open_drain      = 1,
 245         .udelay                 = 2,            /* ~100 kHz */
 246         .timeout                = HZ,
 247 };
 248
 249 static struct platform_device gpr_i2c_device = {
 250         .name                   = "i2c-gpio",
 251         .id                     = -1,
 252         .dev.platform_data      = &gpr_i2c_data,
 253 };
 254
 255 static struct i2c_board_info gpr_i2c_info[] __initdata = {
 256         {
 257                 I2C_BOARD_INFO("lm83", 0x18),
 258         }
 259 };
 260
 261
 262
 263 static struct resource alchemy_pci_host_res[] = {
 264         [0] = {
 265                 .start  = AU1500_PCI_PHYS_ADDR,
 266                 .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
 267                 .flags  = IORESOURCE_MEM,
 268         },
 269 };
 270
 271 static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
 272 {
 273         if ((slot == 0) && (pin == 1))
 274                 return AU1550_PCI_INTA;
 275         else if ((slot == 0) && (pin == 2))
 276                 return AU1550_PCI_INTB;
 277
 278         return 0xff;
 279 }
 280
 281 static struct alchemy_pci_platdata gpr_pci_pd = {
 282         .board_map_irq  = gpr_map_pci_irq,
 283         .pci_cfg_set    = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
 284                           PCI_CONFIG_CH |
 285 #if defined(__MIPSEB__)
 286                           PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
 287 #else
 288                           0,
 289 #endif
 290 };
 291
 292 static struct platform_device gpr_pci_host_dev = {
 293         .dev.platform_data = &gpr_pci_pd,
 294         .name           = "alchemy-pci",
 295         .id             = 0,
 296         .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
 297         .resource       = alchemy_pci_host_res,
 298 };
 299
 300 static struct platform_device *gpr_devices[] __initdata = {
 301         &gpr_wdt_device,
 302         &gpr_mtd_device,
 303         &gpr_i2c_device,
 304         &gpr_led_devices,
 305 };
 306
 307 static int __init gpr_pci_init(void)
 308 {
 309         return platform_device_register(&gpr_pci_host_dev);
 310 }
 311 /* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
 312 arch_initcall(gpr_pci_init);
 313
 314
 315 static int __init gpr_dev_init(void)
 316 {
 317         gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
 318         i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
 319
 320         return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
 321 }
 322 device_initcall(gpr_dev_init);