/*
 * Texas Instruments TNETV107X SoC devices
 *
 * Copyright (C) 2010 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/slab.h>

#include <mach/common.h>
#include <mach/irqs.h>
#include <mach/edma.h>
#include <mach/tnetv107x.h>

#include "clock.h"

/* Base addresses for on-chip devices */
#define TNETV107X_TPCC_BASE			0x01c00000
#define TNETV107X_TPTC0_BASE			0x01c10000
#define TNETV107X_TPTC1_BASE			0x01c10400
#define TNETV107X_WDOG_BASE			0x08086700
#define TNETV107X_TSC_BASE			0x08088500
#define TNETV107X_SDIO0_BASE			0x08088700
#define TNETV107X_SDIO1_BASE			0x08088800
#define TNETV107X_KEYPAD_BASE			0x08088a00
#define TNETV107X_SSP_BASE			0x08088c00
#define TNETV107X_ASYNC_EMIF_CNTRL_BASE		0x08200000
#define TNETV107X_ASYNC_EMIF_DATA_CE0_BASE	0x30000000
#define TNETV107X_ASYNC_EMIF_DATA_CE1_BASE	0x40000000
#define TNETV107X_ASYNC_EMIF_DATA_CE2_BASE	0x44000000
#define TNETV107X_ASYNC_EMIF_DATA_CE3_BASE	0x48000000

/* TNETV107X specific EDMA3 information */
#define EDMA_TNETV107X_NUM_DMACH	64
#define EDMA_TNETV107X_NUM_TCC		64
#define EDMA_TNETV107X_NUM_PARAMENTRY	128
#define EDMA_TNETV107X_NUM_EVQUE	2
#define EDMA_TNETV107X_NUM_TC		2
#define EDMA_TNETV107X_CHMAP_EXIST	0
#define EDMA_TNETV107X_NUM_REGIONS	4
#define TNETV107X_DMACH2EVENT_MAP0	0x3C0CE000u
#define TNETV107X_DMACH2EVENT_MAP1	0x000FFFFFu

#define TNETV107X_DMACH_SDIO0_RX		26
#define TNETV107X_DMACH_SDIO0_TX		27
#define TNETV107X_DMACH_SDIO1_RX		28
#define TNETV107X_DMACH_SDIO1_TX		29

static const s8 edma_tc_mapping[][2] = {
	/* event queue no	TC no	*/
	{	 0,		 0	},
	{	 1,		 1	},
	{	-1,		-1	}
};

static const s8 edma_priority_mapping[][2] = {
	/* event queue no	Prio	*/
	{	 0,		 3	},
	{	 1,		 7	},
	{	-1,		-1	}
};

static struct edma_soc_info edma_cc0_info = {
	.n_channel		= EDMA_TNETV107X_NUM_DMACH,
	.n_region		= EDMA_TNETV107X_NUM_REGIONS,
	.n_slot			= EDMA_TNETV107X_NUM_PARAMENTRY,
	.n_tc			= EDMA_TNETV107X_NUM_TC,
	.n_cc			= 1,
	.queue_tc_mapping	= edma_tc_mapping,
	.queue_priority_mapping	= edma_priority_mapping,
	.default_queue		= EVENTQ_1,
};

static struct edma_soc_info *tnetv107x_edma_info[EDMA_MAX_CC] = {
	&edma_cc0_info,
};

static struct resource edma_resources[] = {
	{
		.name	= "edma_cc0",
		.start	= TNETV107X_TPCC_BASE,
		.end	= TNETV107X_TPCC_BASE + SZ_32K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc0",
		.start	= TNETV107X_TPTC0_BASE,
		.end	= TNETV107X_TPTC0_BASE + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma_tc1",
		.start	= TNETV107X_TPTC1_BASE,
		.end	= TNETV107X_TPTC1_BASE + SZ_1K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "edma0",
		.start	= IRQ_TNETV107X_TPCC,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "edma0_err",
		.start	= IRQ_TNETV107X_TPCC_ERR,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device edma_device = {
	.name		= "edma",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(edma_resources),
	.resource	= edma_resources,
	.dev.platform_data = tnetv107x_edma_info,
};

static struct plat_serial8250_port serial_data[] = {
	{
		.mapbase	= TNETV107X_UART0_BASE,
		.irq		= IRQ_TNETV107X_UART0,
		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
					UPF_FIXED_TYPE | UPF_IOREMAP,
		.type		= PORT_AR7,
		.iotype		= UPIO_MEM32,
		.regshift	= 2,
	},
	{
		.mapbase	= TNETV107X_UART1_BASE,
		.irq		= IRQ_TNETV107X_UART1,
		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
					UPF_FIXED_TYPE | UPF_IOREMAP,
		.type		= PORT_AR7,
		.iotype		= UPIO_MEM32,
		.regshift	= 2,
	},
	{
		.mapbase	= TNETV107X_UART2_BASE,
		.irq		= IRQ_TNETV107X_UART2,
		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
					UPF_FIXED_TYPE | UPF_IOREMAP,
		.type		= PORT_AR7,
		.iotype		= UPIO_MEM32,
		.regshift	= 2,
	},
	{
		.flags	= 0,
	},
};

struct platform_device tnetv107x_serial_device = {
	.name			= "serial8250",
	.id			= PLAT8250_DEV_PLATFORM,
	.dev.platform_data	= serial_data,
};

static struct resource mmc0_resources[] = {
	{ /* Memory mapped registers */
		.start	= TNETV107X_SDIO0_BASE,
		.end	= TNETV107X_SDIO0_BASE + 0x0ff,
		.flags	= IORESOURCE_MEM
	},
	{ /* MMC interrupt */
		.start	= IRQ_TNETV107X_MMC0,
		.flags	= IORESOURCE_IRQ
	},
	{ /* SDIO interrupt */
		.start	= IRQ_TNETV107X_SDIO0,
		.flags	= IORESOURCE_IRQ
	},
	{ /* DMA RX */
		.start	= EDMA_CTLR_CHAN(0, TNETV107X_DMACH_SDIO0_RX),
		.flags	= IORESOURCE_DMA
	},
	{ /* DMA TX */
		.start	= EDMA_CTLR_CHAN(0, TNETV107X_DMACH_SDIO0_TX),
		.flags	= IORESOURCE_DMA
	},
};

static struct resource mmc1_resources[] = {
	{ /* Memory mapped registers */
		.start	= TNETV107X_SDIO1_BASE,
		.end	= TNETV107X_SDIO1_BASE + 0x0ff,
		.flags	= IORESOURCE_MEM
	},
	{ /* MMC interrupt */
		.start	= IRQ_TNETV107X_MMC1,
		.flags	= IORESOURCE_IRQ
	},
	{ /* SDIO interrupt */
		.start	= IRQ_TNETV107X_SDIO1,
		.flags	= IORESOURCE_IRQ
	},
	{ /* DMA RX */
		.start	= EDMA_CTLR_CHAN(0, TNETV107X_DMACH_SDIO1_RX),
		.flags	= IORESOURCE_DMA
	},
	{ /* DMA TX */
		.start	= EDMA_CTLR_CHAN(0, TNETV107X_DMACH_SDIO1_TX),
		.flags	= IORESOURCE_DMA
	},
};

static u64 mmc0_dma_mask = DMA_BIT_MASK(32);
static u64 mmc1_dma_mask = DMA_BIT_MASK(32);

static struct platform_device mmc_devices[2] = {
	{
		.name		= "davinci_mmc",
		.id		= 0,
		.dev		= {
			.dma_mask		= &mmc0_dma_mask,
			.coherent_dma_mask	= DMA_BIT_MASK(32),
		},
		.num_resources	= ARRAY_SIZE(mmc0_resources),
		.resource	= mmc0_resources
	},
	{
		.name		= "davinci_mmc",
		.id		= 1,
		.dev		= {
			.dma_mask		= &mmc1_dma_mask,
			.coherent_dma_mask	= DMA_BIT_MASK(32),
		},
		.num_resources	= ARRAY_SIZE(mmc1_resources),
		.resource	= mmc1_resources
	},
};

static const u32 emif_windows[] = {
	TNETV107X_ASYNC_EMIF_DATA_CE0_BASE, TNETV107X_ASYNC_EMIF_DATA_CE1_BASE,
	TNETV107X_ASYNC_EMIF_DATA_CE2_BASE, TNETV107X_ASYNC_EMIF_DATA_CE3_BASE,
};

static const u32 emif_window_sizes[] = { SZ_256M, SZ_64M, SZ_64M, SZ_64M };

static struct resource wdt_resources[] = {
	{
		.start	= TNETV107X_WDOG_BASE,
		.end	= TNETV107X_WDOG_BASE + SZ_4K - 1,
		.flags	= IORESOURCE_MEM,
	},
};

struct platform_device tnetv107x_wdt_device = {
	.name		= "tnetv107x_wdt",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(wdt_resources),
	.resource	= wdt_resources,
};

static int __init nand_init(int chipsel, struct davinci_nand_pdata *data)
{
	struct resource res[2];
	struct platform_device *pdev;
	u32	range;
	int	ret;

	/* Figure out the resource range from the ale/cle masks */
	range = max(data->mask_cle, data->mask_ale);
	range = PAGE_ALIGN(range + 4) - 1;

	if (range >= emif_window_sizes[chipsel])
		return -EINVAL;

	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
	if (!pdev)
		return -ENOMEM;

	pdev->name		= "davinci_nand";
	pdev->id		= chipsel;
	pdev->dev.platform_data	= data;

	memset(res, 0, sizeof(res));

	res[0].start	= emif_windows[chipsel];
	res[0].end	= res[0].start + range;
	res[0].flags	= IORESOURCE_MEM;

	res[1].start	= TNETV107X_ASYNC_EMIF_CNTRL_BASE;
	res[1].end	= res[1].start + SZ_4K - 1;
	res[1].flags	= IORESOURCE_MEM;

	ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
	if (ret < 0) {
		kfree(pdev);
		return ret;
	}

	return platform_device_register(pdev);
}

static struct resource keypad_resources[] = {
	{
		.start	= TNETV107X_KEYPAD_BASE,
		.end	= TNETV107X_KEYPAD_BASE + 0xff,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= IRQ_TNETV107X_KEYPAD,
		.flags	= IORESOURCE_IRQ,
		.name	= "press",
	},
	{
		.start	= IRQ_TNETV107X_KEYPAD_FREE,
		.flags	= IORESOURCE_IRQ,
		.name	= "release",
	},
};

static struct platform_device keypad_device = {
	.name		= "tnetv107x-keypad",
	.num_resources	= ARRAY_SIZE(keypad_resources),
	.resource	= keypad_resources,
};

static struct resource tsc_resources[] = {
	{
		.start	= TNETV107X_TSC_BASE,
		.end	= TNETV107X_TSC_BASE + 0xff,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= IRQ_TNETV107X_TSC,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device tsc_device = {
	.name		= "tnetv107x-ts",
	.num_resources	= ARRAY_SIZE(tsc_resources),
	.resource	= tsc_resources,
};

static struct resource ssp_resources[] = {
	{
		.start	= TNETV107X_SSP_BASE,
		.end	= TNETV107X_SSP_BASE + 0x1ff,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= IRQ_TNETV107X_SSP,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device ssp_device = {
	.name		= "ti-ssp",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(ssp_resources),
	.resource	= ssp_resources,
};

void __init tnetv107x_devices_init(struct tnetv107x_device_info *info)
{
	int i, error;
	struct clk *tsc_clk;

	/*
	 * The reset defaults for tnetv107x tsc clock divider is set too high.
	 * This forces the clock down to a range that allows the ADC to
	 * complete sample conversion in time.
	 */
	tsc_clk = clk_get(NULL, "sys_tsc_clk");
	if (tsc_clk) {
		error = clk_set_rate(tsc_clk, 5000000);
		WARN_ON(error < 0);
		clk_put(tsc_clk);
	}

	platform_device_register(&edma_device);
	platform_device_register(&tnetv107x_wdt_device);
	platform_device_register(&tsc_device);

	if (info->serial_config)
		davinci_serial_init(info->serial_config);

	for (i = 0; i < 2; i++)
		if (info->mmc_config[i]) {
			mmc_devices[i].dev.platform_data = info->mmc_config[i];
			platform_device_register(&mmc_devices[i]);
		}

	for (i = 0; i < 4; i++)
		if (info->nand_config[i])
			nand_init(i, info->nand_config[i]);

	if (info->keypad_config) {
		keypad_device.dev.platform_data = info->keypad_config;
		platform_device_register(&keypad_device);
	}

	if (info->ssp_config) {
		ssp_device.dev.platform_data = info->ssp_config;
		platform_device_register(&ssp_device);
	}
}