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/*
* arch/arm/mach-ks8695/board-acs5k.c
*
* Brivo Systems LLC, ACS-5000 Master Board
*
* Copyright 2008 Simtec Electronics
* Daniel Silverstone <dsilvers@simtec.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-gpio.h>
#include <linux/platform_data/pca953x.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/partitions.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <mach/devices.h>
#include <mach/gpio-ks8695.h>
#include "generic.h"
static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
.sda_pin = 4,
.scl_pin = 5,
.udelay = 10,
};
static struct platform_device acs5k_i2c_device = {
.name = "i2c-gpio",
.id = -1,
.num_resources = 0,
.resource = NULL,
.dev = {
.platform_data = &acs5k_i2c_device_platdata,
},
};
static int acs5k_pca9555_setup(struct i2c_client *client,
unsigned gpio_base, unsigned ngpio,
void *context)
{
static int acs5k_gpio_value[] = {
-1, -1, -1, -1, -1, -1, -1, 0, 1, 1, -1, 0, 1, 0, -1, -1
};
int n;
for (n = 0; n < ARRAY_SIZE(acs5k_gpio_value); ++n) {
gpio_request(gpio_base + n, "ACS-5000 GPIO Expander");
if (acs5k_gpio_value[n] < 0)
gpio_direction_input(gpio_base + n);
else
gpio_direction_output(gpio_base + n,
acs5k_gpio_value[n]);
gpio_export(gpio_base + n, 0); /* Export, direction locked down */
}
return 0;
}
static struct pca953x_platform_data acs5k_i2c_pca9555_platdata = {
.gpio_base = 16, /* Start directly after the CPU's GPIO */
.invert = 0, /* Do not invert */
.setup = acs5k_pca9555_setup,
};
static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
{
I2C_BOARD_INFO("pcf8563", 0x51),
},
{
I2C_BOARD_INFO("pca9555", 0x20),
.platform_data = &acs5k_i2c_pca9555_platdata,
},
};
static void acs5k_i2c_init(void)
{
/* The gpio interface */
platform_device_register(&acs5k_i2c_device);
/* I2C devices */
i2c_register_board_info(0, acs5k_i2c_devs,
ARRAY_SIZE(acs5k_i2c_devs));
}
static struct mtd_partition acs5k_nor_partitions[] = {
[0] = {
.name = "Boot Agent and config",
.size = SZ_256K,
.offset = 0,
.mask_flags = MTD_WRITEABLE,
},
[1] = {
.name = "Kernel",
.size = SZ_1M,
.offset = SZ_256K,
},
[2] = {
.name = "SquashFS1",
.size = SZ_2M,
.offset = SZ_256K + SZ_1M,
},
[3] = {
.name = "SquashFS2",
.size = SZ_4M + SZ_2M,
.offset = SZ_256K + SZ_1M + SZ_2M,
},
[4] = {
.name = "Data",
.size = SZ_16M + SZ_4M + SZ_2M + SZ_512K, /* 22.5 MB */
.offset = SZ_256K + SZ_8M + SZ_1M,
}
};
static struct physmap_flash_data acs5k_nor_pdata = {
.width = 4,
.nr_parts = ARRAY_SIZE(acs5k_nor_partitions),
.parts = acs5k_nor_partitions,
};
static struct resource acs5k_nor_resource[] = {
[0] = {
.start = SZ_32M, /* We expect the bootloader to map
* the flash here.
*/
.end = SZ_32M + SZ_16M - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = SZ_32M + SZ_16M,
.end = SZ_32M + SZ_32M - SZ_256K - 1,
.flags = IORESOURCE_MEM,
}
};
static struct platform_device acs5k_device_nor = {
.name = "physmap-flash",
.id = -1,
.num_resources = ARRAY_SIZE(acs5k_nor_resource),
.resource = acs5k_nor_resource,
.dev = {
.platform_data = &acs5k_nor_pdata,
},
};
static void __init acs5k_register_nor(void)
{
int ret;
if (acs5k_nor_partitions[0].mask_flags == 0)
printk(KERN_WARNING "Warning: Unprotecting bootloader and configuration partition\n");
ret = platform_device_register(&acs5k_device_nor);
if (ret < 0)
printk(KERN_ERR "failed to register physmap-flash device\n");
}
static int __init acs5k_protection_setup(char *s)
{
/* We can't allocate anything here but we should be able
* to trivially parse s and decide if we can protect the
* bootloader partition or not
*/
if (strcmp(s, "no") == 0)
acs5k_nor_partitions[0].mask_flags = 0;
return 1;
}
__setup("protect_bootloader=", acs5k_protection_setup);
static void __init acs5k_init_gpio(void)
{
int i;
ks8695_register_gpios();
for (i = 0; i < 4; ++i)
gpio_request(i, "ACS5K IRQ");
gpio_request(7, "ACS5K KS_FRDY");
for (i = 8; i < 16; ++i)
gpio_request(i, "ACS5K Unused");
gpio_request(3, "ACS5K CAN Control");
gpio_request(6, "ACS5K Heartbeat");
gpio_direction_output(3, 1); /* Default CAN_RESET high */
gpio_direction_output(6, 0); /* Default KS8695_ACTIVE low */
gpio_export(3, 0); /* export CAN_RESET as output only */
gpio_export(6, 0); /* export KS8695_ACTIVE as output only */
}
static void __init acs5k_init(void)
{
acs5k_init_gpio();
/* Network device */
ks8695_add_device_lan(); /* eth0 = LAN */
ks8695_add_device_wan(); /* ethX = WAN */
/* NOR devices */
acs5k_register_nor();
/* I2C bus */
acs5k_i2c_init();
}
MACHINE_START(ACS5K, "Brivo Systems LLC ACS-5000 Master board")
/* Maintainer: Simtec Electronics. */
.atag_offset = 0x100,
.map_io = ks8695_map_io,
.init_irq = ks8695_init_irq,
.init_machine = acs5k_init,
.init_time = ks8695_timer_init,
.restart = ks8695_restart,
MACHINE_END
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