board-omapl138-hawk.c

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/*
 * Hawkboard.org based on TI's OMAP-L138 Platform
 *
 * Initial code: Syed Mohammed Khasim
 *
 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of
 * any kind, whether express or implied.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/cp_intc.h>
#include <mach/da8xx.h>
#include <mach/mux.h>

#define HAWKBOARD_PHY_ID        "davinci_mdio-0:07"
#define DA850_HAWK_MMCSD_CD_PIN     GPIO_TO_PIN(3, 12)
#define DA850_HAWK_MMCSD_WP_PIN     GPIO_TO_PIN(3, 13)

#define DA850_USB1_VBUS_PIN     GPIO_TO_PIN(2, 4)
#define DA850_USB1_OC_PIN       GPIO_TO_PIN(6, 13)

static short omapl138_hawk_mii_pins[] __initdata = {
    DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
    DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
    DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
    DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
    DA850_MDIO_D,
    -1
};

static __init void omapl138_hawk_config_emac(void)
{
    void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
    int ret;
    u32 val;
    struct davinci_soc_info *soc_info = &davinci_soc_info;

    val = __raw_readl(cfgchip3);
    val &= ~BIT(8);
    ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
    if (ret) {
        pr_warning("%s: cpgmac/mii mux setup failed: %d\n",
            __func__, ret);
        return;
    }

    /* configure the CFGCHIP3 register for MII */
    __raw_writel(val, cfgchip3);
    pr_info("EMAC: MII PHY configured\n");

    soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;

    ret = da8xx_register_emac();
    if (ret)
        pr_warning("%s: emac registration failed: %d\n",
            __func__, ret);
}

/*
 * The following EDMA channels/slots are not being used by drivers (for
 * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
 * hence they are being reserved for codecs on the DSP side.
 */
static const s16 da850_dma0_rsv_chans[][2] = {
    /* (offset, number) */
    { 8,  6},
    {24,  4},
    {30,  2},
    {-1, -1}
};

static const s16 da850_dma0_rsv_slots[][2] = {
    /* (offset, number) */
    { 8,  6},
    {24,  4},
    {30, 50},
    {-1, -1}
};

static const s16 da850_dma1_rsv_chans[][2] = {
    /* (offset, number) */
    { 0, 28},
    {30,  2},
    {-1, -1}
};

static const s16 da850_dma1_rsv_slots[][2] = {
    /* (offset, number) */
    { 0, 28},
    {30, 90},
    {-1, -1}
};

static struct edma_rsv_info da850_edma_cc0_rsv = {
    .rsv_chans  = da850_dma0_rsv_chans,
    .rsv_slots  = da850_dma0_rsv_slots,
};

static struct edma_rsv_info da850_edma_cc1_rsv = {
    .rsv_chans  = da850_dma1_rsv_chans,
    .rsv_slots  = da850_dma1_rsv_slots,
};

static struct edma_rsv_info *da850_edma_rsv[2] = {
    &da850_edma_cc0_rsv,
    &da850_edma_cc1_rsv,
};

static const short hawk_mmcsd0_pins[] = {
    DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
    DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
    DA850_GPIO3_12, DA850_GPIO3_13,
    -1
};

static int da850_hawk_mmc_get_ro(int index)
{
    return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
}

static int da850_hawk_mmc_get_cd(int index)
{
    return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
}

static struct davinci_mmc_config da850_mmc_config = {
    .get_ro     = da850_hawk_mmc_get_ro,
    .get_cd     = da850_hawk_mmc_get_cd,
    .wires      = 4,
    .max_freq   = 50000000,
    .caps       = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
    .version    = MMC_CTLR_VERSION_2,
};

static __init void omapl138_hawk_mmc_init(void)
{
    int ret;

    ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
    if (ret) {
        pr_warning("%s: MMC/SD0 mux setup failed: %d\n",
            __func__, ret);
        return;
    }

    ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
            GPIOF_DIR_IN, "MMC CD");
    if (ret < 0) {
        pr_warning("%s: can not open GPIO %d\n",
            __func__, DA850_HAWK_MMCSD_CD_PIN);
        return;
    }

    ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
            GPIOF_DIR_IN, "MMC WP");
    if (ret < 0) {
        pr_warning("%s: can not open GPIO %d\n",
            __func__, DA850_HAWK_MMCSD_WP_PIN);
        goto mmc_setup_wp_fail;
    }

    ret = da8xx_register_mmcsd0(&da850_mmc_config);
    if (ret) {
        pr_warning("%s: MMC/SD0 registration failed: %d\n",
            __func__, ret);
        goto mmc_setup_mmcsd_fail;
    }

    return;

mmc_setup_mmcsd_fail:
    gpio_free(DA850_HAWK_MMCSD_WP_PIN);
mmc_setup_wp_fail:
    gpio_free(DA850_HAWK_MMCSD_CD_PIN);
}

static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
static da8xx_ocic_handler_t hawk_usb_ocic_handler;

static const short da850_hawk_usb11_pins[] = {
    DA850_GPIO2_4, DA850_GPIO6_13,
    -1
};

static int hawk_usb_set_power(unsigned port, int on)
{
    gpio_set_value(DA850_USB1_VBUS_PIN, on);
    return 0;
}

static int hawk_usb_get_power(unsigned port)
{
    return gpio_get_value(DA850_USB1_VBUS_PIN);
}

static int hawk_usb_get_oci(unsigned port)
{
    return !gpio_get_value(DA850_USB1_OC_PIN);
}

static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
{
    int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
    int error       = 0;

    if (handler != NULL) {
        hawk_usb_ocic_handler = handler;

        error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
                    IRQF_DISABLED | IRQF_TRIGGER_RISING |
                    IRQF_TRIGGER_FALLING,
                    "OHCI over-current indicator", NULL);
        if (error)
            pr_err("%s: could not request IRQ to watch "
                "over-current indicator changes\n", __func__);
    } else {
        free_irq(irq, NULL);
    }
    return error;
}

static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
    .set_power      = hawk_usb_set_power,
    .get_power      = hawk_usb_get_power,
    .get_oci        = hawk_usb_get_oci,
    .ocic_notify    = hawk_usb_ocic_notify,
    /* TPS2087 switch @ 5V */
    .potpgt         = (3 + 1) / 2,  /* 3 ms max */
};

static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
{
    hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
    return IRQ_HANDLED;
}

static __init void omapl138_hawk_usb_init(void)
{
    int ret;
    u32 cfgchip2;

    ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
    if (ret) {
        pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
            __func__, ret);
        return;
    }

    /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */

    cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
    cfgchip2 &= ~CFGCHIP2_REFFREQ;
    cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
    __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));

    ret = gpio_request_one(DA850_USB1_VBUS_PIN,
            GPIOF_DIR_OUT, "USB1 VBUS");
    if (ret < 0) {
        pr_err("%s: failed to request GPIO for USB 1.1 port "
            "power control: %d\n", __func__, ret);
        return;
    }

    ret = gpio_request_one(DA850_USB1_OC_PIN,
            GPIOF_DIR_IN, "USB1 OC");
    if (ret < 0) {
        pr_err("%s: failed to request GPIO for USB 1.1 port "
            "over-current indicator: %d\n", __func__, ret);
        goto usb11_setup_oc_fail;
    }

    ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
    if (ret) {
        pr_warning("%s: USB 1.1 registration failed: %d\n",
            __func__, ret);
        goto usb11_setup_fail;
    }

    return;

usb11_setup_fail:
    gpio_free(DA850_USB1_OC_PIN);
usb11_setup_oc_fail:
    gpio_free(DA850_USB1_VBUS_PIN);
}

static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
    .enabled_uarts = 0x7,
};

static __init void omapl138_hawk_init(void)
{
    int ret;

    davinci_serial_init(&omapl138_hawk_uart_config);

    omapl138_hawk_config_emac();

    ret = da850_register_edma(da850_edma_rsv);
    if (ret)
        pr_warning("%s: EDMA registration failed: %d\n",
            __func__, ret);

    omapl138_hawk_mmc_init();

    omapl138_hawk_usb_init();

    ret = da8xx_register_watchdog();
    if (ret)
        pr_warning("omapl138_hawk_init: "
            "watchdog registration failed: %d\n",
            ret);
}

#ifdef CONFIG_SERIAL_8250_CONSOLE
static int __init omapl138_hawk_console_init(void)
{
    if (!machine_is_omapl138_hawkboard())
        return 0;

    return add_preferred_console("ttyS", 2, "115200");
}
console_initcall(omapl138_hawk_console_init);
#endif

static void __init omapl138_hawk_map_io(void)
{
    da850_init();
}

MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
    .atag_offset    = 0x100,
    .map_io     = omapl138_hawk_map_io,
    .init_irq   = cp_intc_init,
    .timer      = &davinci_timer,
    .init_machine   = omapl138_hawk_init,
    .init_late  = davinci_init_late,
    .dma_zone_size  = SZ_128M,
    .restart    = da8xx_restart,
MACHINE_END