/*
 * 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 <linux/mfd/da8xx-cfgchip.h>
#include <linux/platform_data/gpio-davinci.h>
#include <linux/regulator/machine.h>

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

#include <mach/common.h>
#include "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_warn("%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_warn("%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,
};

static __init void omapl138_hawk_mmc_init(void)
{
	int ret;

	ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
	if (ret) {
		pr_warn("%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_warn("%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_warn("%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_warn("%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_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_warn("%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_MASK;
	cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
	__raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));

	ret = da8xx_register_usb_phy();
	if (ret)
		pr_warn("%s: USB PHY registration failed: %d\n",
			__func__, ret);

	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_warn("%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 __init void omapl138_hawk_init(void)
{
	int ret;

	ret = da8xx_register_cfgchip();
	if (ret)
		pr_warn("%s: CFGCHIP registration failed: %d\n", __func__, ret);

	ret = da850_register_gpio();
	if (ret)
		pr_warn("%s: GPIO init failed: %d\n", __func__, ret);

	davinci_serial_init(da8xx_serial_device);

	omapl138_hawk_config_emac();

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

	omapl138_hawk_mmc_init();

	omapl138_hawk_usb_init();

	ret = da8xx_register_watchdog();
	if (ret)
		pr_warn("%s: watchdog registration failed: %d\n",
			__func__, ret);

	ret = da8xx_register_rproc();
	if (ret)
		pr_warn("%s: dsp/rproc registration failed: %d\n",
			__func__, ret);

	regulator_has_full_constraints();
}

#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,
	.init_time	= davinci_timer_init,
	.init_machine	= omapl138_hawk_init,
	.init_late	= davinci_init_late,
	.dma_zone_size	= SZ_128M,
	.restart	= da8xx_restart,
	.reserve	= da8xx_rproc_reserve_cma,
MACHINE_END