arch/arm/mach-ks8695/board-acs5k.c

   1 /*
   2  * arch/arm/mach-ks8695/board-acs5k.c
   3  *
   4  * Brivo Systems LLC, ACS-5000 Master Board
   5  *
   6  * Copyright 2008 Simtec Electronics
   7  *                Daniel Silverstone <dsilvers@simtec.co.uk>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #include <linux/gpio.h>
  14 #include <linux/kernel.h>
  15 #include <linux/types.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19
  20 #include <linux/i2c.h>
  21 #include <linux/i2c-algo-bit.h>
  22 #include <linux/i2c-gpio.h>
  23 #include <linux/i2c/pca953x.h>
  24
  25 #include <linux/mtd/mtd.h>
  26 #include <linux/mtd/map.h>
  27 #include <linux/mtd/physmap.h>
  28 #include <linux/mtd/partitions.h>
  29
  30 #include <asm/mach-types.h>
  31
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/irq.h>
  35
  36 #include <mach/devices.h>
  37 #include <mach/gpio-ks8695.h>
  38
  39 #include "generic.h"
  40
  41 static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
  42         .sda_pin        = 4,
  43         .scl_pin        = 5,
  44         .udelay         = 10,
  45 };
  46
  47 static struct platform_device acs5k_i2c_device = {
  48         .name           = "i2c-gpio",
  49         .id             = -1,
  50         .num_resources  = 0,
  51         .resource       = NULL,
  52         .dev            = {
  53                 .platform_data  = &acs5k_i2c_device_platdata,
  54         },
  55 };
  56
  57 static int acs5k_pca9555_setup(struct i2c_client *client,
  58                                unsigned gpio_base, unsigned ngpio,
  59                                void *context)
  60 {
  61         static int acs5k_gpio_value[] = {
  62                 -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, -1, 0, 1, 0, -1, -1
  63         };
  64         int n;
  65
  66         for (n = 0; n < ARRAY_SIZE(acs5k_gpio_value); ++n) {
  67                 gpio_request(gpio_base + n, "ACS-5000 GPIO Expander");
  68                 if (acs5k_gpio_value[n] < 0)
  69                         gpio_direction_input(gpio_base + n);
  70                 else
  71                         gpio_direction_output(gpio_base + n,
  72                                               acs5k_gpio_value[n]);
  73                 gpio_export(gpio_base + n, 0); /* Export, direction locked down */
  74         }
  75
  76         return 0;
  77 }
  78
  79 static struct pca953x_platform_data acs5k_i2c_pca9555_platdata = {
  80         .gpio_base      = 16, /* Start directly after the CPU's GPIO */
  81         .invert         = 0, /* Do not invert */
  82         .setup          = acs5k_pca9555_setup,
  83 };
  84
  85 static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
  86         {
  87                 I2C_BOARD_INFO("pcf8563", 0x51),
  88         },
  89         {
  90                 I2C_BOARD_INFO("pca9555", 0x20),
  91                 .platform_data = &acs5k_i2c_pca9555_platdata,
  92         },
  93 };
  94
  95 static void acs5k_i2c_init(void)
  96 {
  97         /* The gpio interface */
  98         platform_device_register(&acs5k_i2c_device);
  99         /* I2C devices */
 100         i2c_register_board_info(0, acs5k_i2c_devs,
 101                                 ARRAY_SIZE(acs5k_i2c_devs));
 102 }
 103
 104 static struct mtd_partition acs5k_nor_partitions[] = {
 105         [0] = {
 106                 .name   = "Boot Agent and config",
 107                 .size   = SZ_256K,
 108                 .offset = 0,
 109                 .mask_flags = MTD_WRITEABLE,
 110         },
 111         [1] = {
 112                 .name   = "Kernel",
 113                 .size   = SZ_1M,
 114                 .offset = SZ_256K,
 115         },
 116         [2] = {
 117                 .name   = "SquashFS1",
 118                 .size   = SZ_2M,
 119                 .offset = SZ_256K + SZ_1M,
 120         },
 121         [3] = {
 122                 .name   = "SquashFS2",
 123                 .size   = SZ_4M + SZ_2M,
 124                 .offset = SZ_256K + SZ_1M + SZ_2M,
 125         },
 126         [4] = {
 127                 .name   = "Data",
 128                 .size   = SZ_16M + SZ_4M + SZ_2M + SZ_512K, /* 22.5 MB */
 129                 .offset = SZ_256K + SZ_8M + SZ_1M,
 130         }
 131 };
 132
 133 static struct physmap_flash_data acs5k_nor_pdata = {
 134         .width          = 4,
 135         .nr_parts       = ARRAY_SIZE(acs5k_nor_partitions),
 136         .parts          = acs5k_nor_partitions,
 137 };
 138
 139 static struct resource acs5k_nor_resource[] = {
 140         [0] = {
 141                 .start = SZ_32M, /* We expect the bootloader to map
 142                                   * the flash here.
 143                                   */
 144                 .end   = SZ_32M + SZ_16M - 1,
 145                 .flags = IORESOURCE_MEM,
 146         },
 147         [1] = {
 148                 .start = SZ_32M + SZ_16M,
 149                 .end   = SZ_32M + SZ_32M - SZ_256K - 1,
 150                 .flags = IORESOURCE_MEM,
 151         }
 152 };
 153
 154 static struct platform_device acs5k_device_nor = {
 155         .name           = "physmap-flash",
 156         .id             = -1,
 157         .num_resources  = ARRAY_SIZE(acs5k_nor_resource),
 158         .resource       = acs5k_nor_resource,
 159         .dev            = {
 160                 .platform_data = &acs5k_nor_pdata,
 161         },
 162 };
 163
 164 static void __init acs5k_register_nor(void)
 165 {
 166         int ret;
 167
 168         if (acs5k_nor_partitions[0].mask_flags == 0)
 169                 printk(KERN_WARNING "Warning: Unprotecting bootloader and configuration partition\n");
 170
 171         ret = platform_device_register(&acs5k_device_nor);
 172         if (ret < 0)
 173                 printk(KERN_ERR "failed to register physmap-flash device\n");
 174 }
 175
 176 static int __init acs5k_protection_setup(char *s)
 177 {
 178         /* We can't allocate anything here but we should be able
 179          * to trivially parse s and decide if we can protect the
 180          * bootloader partition or not
 181          */
 182         if (strcmp(s, "no") == 0)
 183                 acs5k_nor_partitions[0].mask_flags = 0;
 184
 185         return 1;
 186 }
 187
 188 __setup("protect_bootloader=", acs5k_protection_setup);
 189
 190 static void __init acs5k_init_gpio(void)
 191 {
 192         int i;
 193
 194         ks8695_register_gpios();
 195         for (i = 0; i < 4; ++i)
 196                 gpio_request(i, "ACS5K IRQ");
 197         gpio_request(7, "ACS5K KS_FRDY");
 198         for (i = 8; i < 16; ++i)
 199                 gpio_request(i, "ACS5K Unused");
 200
 201         gpio_request(3, "ACS5K CAN Control");
 202         gpio_request(6, "ACS5K Heartbeat");
 203         gpio_direction_output(3, 1); /* Default CAN_RESET high */
 204         gpio_direction_output(6, 0); /* Default KS8695_ACTIVE low */
 205         gpio_export(3, 0); /* export CAN_RESET as output only */
 206         gpio_export(6, 0); /* export KS8695_ACTIVE as output only */
 207 }
 208
 209 static void __init acs5k_init(void)
 210 {
 211         acs5k_init_gpio();
 212
 213         /* Network device */
 214         ks8695_add_device_lan();        /* eth0 = LAN */
 215         ks8695_add_device_wan();        /* ethX = WAN */
 216
 217         /* NOR devices */
 218         acs5k_register_nor();
 219
 220         /* I2C bus */
 221         acs5k_i2c_init();
 222 }
 223
 224 MACHINE_START(ACS5K, "Brivo Systems LLC ACS-5000 Master board")
 225         /* Maintainer: Simtec Electronics. */
 226         .atag_offset    = 0x100,
 227         .map_io         = ks8695_map_io,
 228         .init_irq       = ks8695_init_irq,
 229         .init_machine   = acs5k_init,
 230         .init_time      = ks8695_timer_init,
 231         .restart        = ks8695_restart,
 232 MACHINE_END