setup.c

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/*
 * s6105 control routines
 *
 * Copyright (c) 2009 emlix GmbH
 */
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>

#include <asm/bootparam.h>

#include <variant/hardware.h>
#include <variant/gpio.h>

#include <platform/gpio.h>

void platform_halt(void)
{
    local_irq_disable();
    while (1)
        ;
}

void platform_power_off(void)
{
    platform_halt();
}

void platform_restart(void)
{
    platform_halt();
}

void __init platform_setup(char **cmdline)
{
    unsigned long reg;

    reg = readl(S6_REG_GREG1 + S6_GREG1_PLLSEL);
    reg &= ~(S6_GREG1_PLLSEL_GMAC_MASK << S6_GREG1_PLLSEL_GMAC |
        S6_GREG1_PLLSEL_GMII_MASK << S6_GREG1_PLLSEL_GMII);
    reg |= S6_GREG1_PLLSEL_GMAC_125MHZ << S6_GREG1_PLLSEL_GMAC |
        S6_GREG1_PLLSEL_GMII_125MHZ << S6_GREG1_PLLSEL_GMII;
    writel(reg, S6_REG_GREG1 + S6_GREG1_PLLSEL);

    reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
    reg &= ~(1 << S6_GREG1_BLOCK_SB);
    reg &= ~(1 << S6_GREG1_BLOCK_GMAC);
    writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);

    reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
    reg |= 1 << S6_GREG1_BLOCK_SB;
    reg |= 1 << S6_GREG1_BLOCK_GMAC;
    writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);

    printk(KERN_NOTICE "S6105 on Stretch S6000 - "
        "Copyright (C) 2009 emlix GmbH <[email protected]>\n");
}

void __init platform_init(bp_tag_t *first)
{
    s6_gpio_init(0);
    gpio_request(GPIO_LED1_NGREEN, "led1_green");
    gpio_request(GPIO_LED1_RED, "led1_red");
    gpio_direction_output(GPIO_LED1_NGREEN, 1);
}

void platform_heartbeat(void)
{
    static unsigned int c;

    if (!(++c & 0x4F))
        gpio_direction_output(GPIO_LED1_RED, !(c & 0x10));
}