simpad.c

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/*
 * linux/arch/arm/mach-sa1100/simpad.c
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/mfd/ucb1x00.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <asm/setup.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>
#include <linux/platform_data/mfd-mcp-sa11x0.h>
#include <mach/simpad.h>
#include <mach/irqs.h>

#include <linux/serial_core.h>
#include <linux/ioport.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/leds.h>
#include <linux/i2c-gpio.h>

#include "generic.h"

/*
 * CS3 support
 */

static long cs3_shadow;
static spinlock_t cs3_lock;
static struct gpio_chip cs3_gpio;

long simpad_get_cs3_ro(void)
{
    return readl(CS3_BASE);
}
EXPORT_SYMBOL(simpad_get_cs3_ro);

long simpad_get_cs3_shadow(void)
{
    return cs3_shadow;
}
EXPORT_SYMBOL(simpad_get_cs3_shadow);

static void __simpad_write_cs3(void)
{
    writel(cs3_shadow, CS3_BASE);
}

void simpad_set_cs3_bit(int value)
{
    unsigned long flags;

    spin_lock_irqsave(&cs3_lock, flags);
    cs3_shadow |= value;
    __simpad_write_cs3();
    spin_unlock_irqrestore(&cs3_lock, flags);
}
EXPORT_SYMBOL(simpad_set_cs3_bit);

void simpad_clear_cs3_bit(int value)
{
    unsigned long flags;

    spin_lock_irqsave(&cs3_lock, flags);
    cs3_shadow &= ~value;
    __simpad_write_cs3();
    spin_unlock_irqrestore(&cs3_lock, flags);
}
EXPORT_SYMBOL(simpad_clear_cs3_bit);

static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
    if (offset > 15)
        return;
    if (value)
        simpad_set_cs3_bit(1 << offset);
    else
        simpad_clear_cs3_bit(1 << offset);
};

static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
{
    if (offset > 15)
        return simpad_get_cs3_ro() & (1 << (offset - 16));
    return simpad_get_cs3_shadow() & (1 << offset);
};

static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
    if (offset > 15)
        return 0;
    return -EINVAL;
};

static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
    int value)
{
    if (offset > 15)
        return -EINVAL;
    cs3_gpio_set(chip, offset, value);
    return 0;
};

static struct map_desc simpad_io_desc[] __initdata = {
    {   /* MQ200 */
        .virtual    =  0xf2800000,
        .pfn        = __phys_to_pfn(0x4b800000),
        .length     = 0x00800000,
        .type       = MT_DEVICE
    }, {    /* Simpad CS3 */
        .virtual    = (unsigned long)CS3_BASE,
        .pfn        = __phys_to_pfn(SA1100_CS3_PHYS),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    },
};


static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
    if (port->mapbase == (u_int)&Ser1UTCR0) {
        if (state)
        {
            simpad_clear_cs3_bit(RS232_ON);
            simpad_clear_cs3_bit(DECT_POWER_ON);
        }else
        {
            simpad_set_cs3_bit(RS232_ON);
            simpad_set_cs3_bit(DECT_POWER_ON);
        }
    }
}

static struct sa1100_port_fns simpad_port_fns __initdata = {
    .pm    = simpad_uart_pm,
};


static struct mtd_partition simpad_partitions[] = {
    {
        .name       = "SIMpad boot firmware",
        .size       = 0x00080000,
        .offset     = 0,
        .mask_flags = MTD_WRITEABLE,
    }, {
        .name       = "SIMpad kernel",
        .size       = 0x0010000,
        .offset     = MTDPART_OFS_APPEND,
    }, {
        .name       = "SIMpad root jffs2",
        .size       = MTDPART_SIZ_FULL,
        .offset     = MTDPART_OFS_APPEND,
    }
};

static struct flash_platform_data simpad_flash_data = {
    .map_name    = "cfi_probe",
    .parts       = simpad_partitions,
    .nr_parts    = ARRAY_SIZE(simpad_partitions),
};


static struct resource simpad_flash_resources [] = {
    DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
    DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
};

static struct ucb1x00_plat_data simpad_ucb1x00_data = {
    .gpio_base  = SIMPAD_UCB1X00_GPIO_BASE,
};

static struct mcp_plat_data simpad_mcp_data = {
    .mccr0      = MCCR0_ADM,
    .sclk_rate  = 11981000,
    .codec_pdata    = &simpad_ucb1x00_data,
};



static void __init simpad_map_io(void)
{
    sa1100_map_io();

    iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));

    /* Initialize CS3 */
    cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
        RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
    __simpad_write_cs3(); /* Spinlocks not yet initialized */

        sa1100_register_uart_fns(&simpad_port_fns);
    sa1100_register_uart(0, 3);  /* serial interface */
    sa1100_register_uart(1, 1);  /* DECT             */

    // Reassign UART 1 pins
    GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
    GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
    GPDR &= ~GPIO_UART_RXD;
    PPAR |= PPAR_UPR;

    /*
     * Set up registers for sleep mode.
     */


    PWER = PWER_GPIO0| PWER_RTC;
    PGSR = 0x818;
    PCFR = 0;
    PSDR = 0;

}

static void simpad_power_off(void)
{
    local_irq_disable();
    cs3_shadow = SD_MEDIAQ;
    __simpad_write_cs3(); /* Bypass spinlock here */

    /* disable internal oscillator, float CS lines */
    PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
    /* enable wake-up on GPIO0 */
    PWER = GFER = GRER = PWER_GPIO0;
    /*
     * set scratchpad to zero, just in case it is used as a
     * restart address by the bootloader.
     */
    PSPR = 0;
    PGSR = 0;
    /* enter sleep mode */
    PMCR = PMCR_SF;
    while(1);

    local_irq_enable(); /* we won't ever call it */


}

/*
 * gpio_keys
*/

static struct gpio_keys_button simpad_button_table[] = {
    { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
};

static struct gpio_keys_platform_data simpad_keys_data = {
    .buttons = simpad_button_table,
    .nbuttons = ARRAY_SIZE(simpad_button_table),
};

static struct platform_device simpad_keys = {
    .name = "gpio-keys",
    .dev = {
        .platform_data = &simpad_keys_data,
    },
};

static struct gpio_keys_button simpad_polled_button_table[] = {
    { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
    { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
    { KEY_UP,    SIMPAD_UCB1X00_GPIO_UP,    1, "up button" },
    { KEY_DOWN,  SIMPAD_UCB1X00_GPIO_DOWN,  1, "down button" },
    { KEY_LEFT,  SIMPAD_UCB1X00_GPIO_LEFT,  1, "left button" },
    { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
};

static struct gpio_keys_platform_data simpad_polled_keys_data = {
    .buttons = simpad_polled_button_table,
    .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
    .poll_interval = 50,
};

static struct platform_device simpad_polled_keys = {
    .name = "gpio-keys-polled",
    .dev = {
        .platform_data = &simpad_polled_keys_data,
    },
};

/*
 * GPIO LEDs
 */

static struct gpio_led simpad_leds[] = {
    {
        .name = "simpad:power",
        .gpio = SIMPAD_CS3_LED2_ON,
        .active_low = 0,
        .default_trigger = "default-on",
    },
};

static struct gpio_led_platform_data simpad_led_data = {
    .num_leds = ARRAY_SIZE(simpad_leds),
    .leds = simpad_leds,
};

static struct platform_device simpad_gpio_leds = {
    .name = "leds-gpio",
    .id = 0,
    .dev = {
        .platform_data = &simpad_led_data,
    },
};

/*
 * i2c
 */
static struct i2c_gpio_platform_data simpad_i2c_data = {
    .sda_pin = GPIO_GPIO21,
    .scl_pin = GPIO_GPIO25,
    .udelay = 10,
    .timeout = HZ,
};

static struct platform_device simpad_i2c = {
    .name = "i2c-gpio",
    .id = 0,
    .dev = {
        .platform_data = &simpad_i2c_data,
    },
};

/*
 * MediaQ Video Device
 */
static struct platform_device simpad_mq200fb = {
    .name = "simpad-mq200",
    .id   = 0,
};

static struct platform_device *devices[] __initdata = {
    &simpad_keys,
    &simpad_polled_keys,
    &simpad_mq200fb,
    &simpad_gpio_leds,
    &simpad_i2c,
};



static int __init simpad_init(void)
{
    int ret;

    spin_lock_init(&cs3_lock);

    cs3_gpio.label = "simpad_cs3";
    cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
    cs3_gpio.ngpio = 24;
    cs3_gpio.set = cs3_gpio_set;
    cs3_gpio.get = cs3_gpio_get;
    cs3_gpio.direction_input = cs3_gpio_direction_input;
    cs3_gpio.direction_output = cs3_gpio_direction_output;
    ret = gpiochip_add(&cs3_gpio);
    if (ret)
        printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");

    pm_power_off = simpad_power_off;

    sa11x0_ppc_configure_mcp();
    sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
                  ARRAY_SIZE(simpad_flash_resources));
    sa11x0_register_mcp(&simpad_mcp_data);

    ret = platform_add_devices(devices, ARRAY_SIZE(devices));
    if(ret)
        printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");

    return 0;
}

arch_initcall(simpad_init);


MACHINE_START(SIMPAD, "Simpad")
    /* Maintainer: Holger Freyther */
    .atag_offset    = 0x100,
    .map_io     = simpad_map_io,
    .nr_irqs    = SA1100_NR_IRQS,
    .init_irq   = sa1100_init_irq,
    .init_late  = sa11x0_init_late,
    .timer      = &sa1100_timer,
    .restart    = sa11x0_restart,
MACHINE_END