// SPDX-License-Identifier: GPL-2.0
/***************************************************************************/

/*
 *      m5249.c  -- platform support for ColdFire 5249 based boards
 *
 *      Copyright (C) 2002, Greg Ungerer (gerg@snapgear.com)
 */

/***************************************************************************/

#include <linux/clkdev.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfclk.h>

/***************************************************************************/

DEFINE_CLK(pll, "pll.0", MCF_CLK);
DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);

struct clk_lookup m5249_clk_lookup[] = {
        CLKDEV_INIT(NULL, "pll.0", &clk_pll),
        CLKDEV_INIT(NULL, "sys.0", &clk_sys),
        CLKDEV_INIT("mcftmr.0", NULL, &clk_sys),
        CLKDEV_INIT("mcftmr.1", NULL, &clk_sys),
        CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
        CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
        CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
        CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
        CLKDEV_INIT("imx1-i2c.1", NULL, &clk_sys),
};

/***************************************************************************/

#ifdef CONFIG_M5249C3

static struct resource m5249_smc91x_resources[] = {
        {
                .start          = 0xe0000300,
                .end            = 0xe0000300 + 0x100,
                .flags          = IORESOURCE_MEM,
        },
        {
                .start          = MCF_IRQ_GPIO6,
                .end            = MCF_IRQ_GPIO6,
                .flags          = IORESOURCE_IRQ,
        },
};

static struct platform_device m5249_smc91x = {
        .name                   = "smc91x",
        .id                     = 0,
        .num_resources          = ARRAY_SIZE(m5249_smc91x_resources),
        .resource               = m5249_smc91x_resources,
};

#endif /* CONFIG_M5249C3 */

static struct platform_device *m5249_devices[] __initdata = {
#ifdef CONFIG_M5249C3
        &m5249_smc91x,
#endif
};

/***************************************************************************/

static void __init m5249_qspi_init(void)
{
#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
        /* QSPI irq setup */
        writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
               MCFSIM_QSPIICR);
        mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
}

/***************************************************************************/

static void __init m5249_i2c_init(void)
{
#if IS_ENABLED(CONFIG_I2C_IMX)
        u32 r;

        /* first I2C controller uses regular irq setup */
        writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0,
               MCFSIM_I2CICR);
        mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C);

        /* second I2C controller is completely different */
        r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
        r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1);
        r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1);
        writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
#endif /* CONFIG_I2C_IMX */
}

/***************************************************************************/

#ifdef CONFIG_M5249C3

static void __init m5249_smc91x_init(void)
{
        u32  gpio;

        /* Set the GPIO line as interrupt source for smc91x device */
        gpio = readl(MCFSIM2_GPIOINTENABLE);
        writel(gpio | 0x40, MCFSIM2_GPIOINTENABLE);

        gpio = readl(MCFINTC2_INTPRI5);
        writel(gpio | 0x04000000, MCFINTC2_INTPRI5);
}

#endif /* CONFIG_M5249C3 */

/***************************************************************************/

void __init config_BSP(char *commandp, int size)
{
        mach_sched_init = hw_timer_init;

#ifdef CONFIG_M5249C3
        m5249_smc91x_init();
#endif
        m5249_qspi_init();
        m5249_i2c_init();

        clkdev_add_table(m5249_clk_lookup, ARRAY_SIZE(m5249_clk_lookup));
}

/***************************************************************************/

static int __init init_BSP(void)
{
        platform_add_devices(m5249_devices, ARRAY_SIZE(m5249_devices));
        return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/