/*
   * DM355 leopard board support
   *
   * Based on board-dm355-evm.c
   *
   * 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/err.h>
  #include <linux/platform_device.h>
  #include <linux/mtd/mtd.h>
  #include <linux/mtd/partitions.h>
  #include <linux/mtd/nand.h>
  #include <linux/i2c.h>
  #include <linux/gpio.h>
  #include <linux/clk.h>
  #include <linux/spi/spi.h>
  #include <linux/spi/eeprom.h>
  #include <linux/platform_data/i2c-davinci.h>
  #include <linux/platform_data/mmc-davinci.h>
  #include <linux/platform_data/mtd-davinci.h>
  #include <linux/platform_data/usb-davinci.h>
  
  #include <asm/mach-types.h>
  #include <asm/mach/arch.h>
  
  #include <mach/common.h>
  #include <mach/serial.h>
  
  #include "davinci.h"
  
  /* NOTE:  this is geared for the standard config, with a socketed
   * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
   * swap chips, maybe with a different block size, partitioning may
   * need to be changed.
   */
  #define NAND_BLOCK_SIZE		SZ_128K
  
  static struct mtd_partition davinci_nand_partitions[] = {
  	{
  		/* UBL (a few copies) plus U-Boot */
  		.name		= "bootloader",
  		.offset		= 0,
  		.size		= 15 * NAND_BLOCK_SIZE,
  		.mask_flags	= MTD_WRITEABLE, /* force read-only */
  	}, {
  		/* U-Boot environment */
  		.name		= "params",
  		.offset		= MTDPART_OFS_APPEND,
  		.size		= 1 * NAND_BLOCK_SIZE,
  		.mask_flags	= 0,
  	}, {
  		.name		= "kernel",
  		.offset		= MTDPART_OFS_APPEND,
  		.size		= SZ_4M,
  		.mask_flags	= 0,
  	}, {
  		.name		= "filesystem1",
  		.offset		= MTDPART_OFS_APPEND,
  		.size		= SZ_512M,
  		.mask_flags	= 0,
  	}, {
  		.name		= "filesystem2",
  		.offset		= MTDPART_OFS_APPEND,
  		.size		= MTDPART_SIZ_FULL,
  		.mask_flags	= 0,
  	}
  	/* two blocks with bad block table (and mirror) at the end */
  };
  
  static struct davinci_nand_pdata davinci_nand_data = {
  	.mask_chipsel		= BIT(14),
  	.parts			= davinci_nand_partitions,
  	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
  	.ecc_mode		= NAND_ECC_HW_SYNDROME,
  	.ecc_bits		= 4,
  	.bbt_options		= NAND_BBT_USE_FLASH,
  };
  
  static struct resource davinci_nand_resources[] = {
  	{
  		.start		= DM355_ASYNC_EMIF_DATA_CE0_BASE,
  		.end		= DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
  		.flags		= IORESOURCE_MEM,
  	}, {
  		.start		= DM355_ASYNC_EMIF_CONTROL_BASE,
  		.end		= DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
  		.flags		= IORESOURCE_MEM,
  	},
  };
  
  static struct platform_device davinci_nand_device = {
  	.name			= "davinci_nand",
  	.id			= 0,
  
  	.num_resources		= ARRAY_SIZE(davinci_nand_resources),
  	.resource		= davinci_nand_resources,
  
  	.dev			= {
  		.platform_data	= &davinci_nand_data,
  	},
  };
  
  static struct davinci_i2c_platform_data i2c_pdata = {
  	.bus_freq	= 400	/* kHz */,
  	.bus_delay	= 0	/* usec */,
  };
  
  static int leopard_mmc_gpio = -EINVAL;
  
  static void dm355leopard_mmcsd_gpios(unsigned gpio)
  {
  	gpio_request(gpio + 0, "mmc0_ro");
  	gpio_request(gpio + 1, "mmc0_cd");
  	gpio_request(gpio + 2, "mmc1_ro");
  	gpio_request(gpio + 3, "mmc1_cd");
  
  	/* we "know" these are input-only so we don't
  	 * need to call gpio_direction_input()
  	 */
  
  	leopard_mmc_gpio = gpio;
  }
  
  static struct i2c_board_info dm355leopard_i2c_info[] = {
  	{ I2C_BOARD_INFO("dm355leopard_msp", 0x25),
  		.platform_data = dm355leopard_mmcsd_gpios,
  		/* plus irq */ },
  	/* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
  	/* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
  };
  
  static void __init leopard_init_i2c(void)
  {
  	davinci_init_i2c(&i2c_pdata);
  
  	gpio_request(5, "dm355leopard_msp");
  	gpio_direction_input(5);
  	dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
  
  	i2c_register_board_info(1, dm355leopard_i2c_info,
  			ARRAY_SIZE(dm355leopard_i2c_info));
  }
  
  static struct resource dm355leopard_dm9000_rsrc[] = {
  	{
  		/* addr */
  		.start	= 0x04000000,
  		.end	= 0x04000001,
  		.flags	= IORESOURCE_MEM,
  	}, {
  		/* data */
  		.start	= 0x04000016,
  		.end	= 0x04000017,
  		.flags	= IORESOURCE_MEM,
  	}, {
  		.flags	= IORESOURCE_IRQ
  			| IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
  	},
  };
  
  static struct platform_device dm355leopard_dm9000 = {
  	.name		= "dm9000",
  	.id		= -1,
  	.resource	= dm355leopard_dm9000_rsrc,
  	.num_resources	= ARRAY_SIZE(dm355leopard_dm9000_rsrc),
  };
  
  static struct platform_device *davinci_leopard_devices[] __initdata = {
  	&dm355leopard_dm9000,
  	&davinci_nand_device,
  };
  
  static void __init dm355_leopard_map_io(void)
  {
  	dm355_init();
  }
  
  static int dm355leopard_mmc_get_cd(int module)
  {
  	if (!gpio_is_valid(leopard_mmc_gpio))
  		return -ENXIO;
  	/* low == card present */
  	return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
  }
  
  static int dm355leopard_mmc_get_ro(int module)
  {
  	if (!gpio_is_valid(leopard_mmc_gpio))
  		return -ENXIO;
  	/* high == card's write protect switch active */
  	return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
  }
  
  static struct davinci_mmc_config dm355leopard_mmc_config = {
  	.get_cd		= dm355leopard_mmc_get_cd,
  	.get_ro		= dm355leopard_mmc_get_ro,
  	.wires		= 4,
  	.max_freq       = 50000000,
  	.caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
  };
  
  /* Don't connect anything to J10 unless you're only using USB host
   * mode *and* have to do so with some kind of gender-bender.  If
   * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
   * the ID pin won't need any help.
   */
  #ifdef CONFIG_USB_MUSB_PERIPHERAL
  #define USB_ID_VALUE	0	/* ID pulled high; *should* float */
  #else
  #define USB_ID_VALUE	1	/* ID pulled low */
  #endif
  
  static struct spi_eeprom at25640a = {
  	.byte_len	= SZ_64K / 8,
  	.name		= "at25640a",
  	.page_size	= 32,
  	.flags		= EE_ADDR2,
  };
  
  static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
  	{
  		.modalias	= "at25",
  		.platform_data	= &at25640a,
  		.max_speed_hz	= 10 * 1000 * 1000,	/* at 3v3 */
  		.bus_num	= 0,
  		.chip_select	= 0,
  		.mode		= SPI_MODE_0,
  	},
  };
  
  static __init void dm355_leopard_init(void)
  {
  	struct clk *aemif;
  	int ret;
  
  	ret = dm355_gpio_register();
  	if (ret)
  		pr_warn("%s: GPIO init failed: %d
  ", __func__, ret);
  
  	gpio_request(9, "dm9000");
  	gpio_direction_input(9);
  	dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
  
  	aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
  	if (IS_ERR(aemif))
  		WARN("%s: unable to get AEMIF clock
  ", __func__);
  	else
  		clk_prepare_enable(aemif);
  
  	platform_add_devices(davinci_leopard_devices,
  			     ARRAY_SIZE(davinci_leopard_devices));
  	leopard_init_i2c();
  	davinci_serial_init(dm355_serial_device);
  
  	/* NOTE:  NAND flash timings set by the UBL are slower than
  	 * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
  	 * but could be 0x0400008c for about 25% faster page reads.
  	 */
  
  	gpio_request(2, "usb_id_toggle");
  	gpio_direction_output(2, USB_ID_VALUE);
  	/* irlml6401 switches over 1A in under 8 msec */
  	davinci_setup_usb(1000, 8);
  
  	davinci_setup_mmc(0, &dm355leopard_mmc_config);
  	davinci_setup_mmc(1, &dm355leopard_mmc_config);
  
  	dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
  			ARRAY_SIZE(dm355_leopard_spi_info));
  }
  
  MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
  	.atag_offset  = 0x100,
  	.map_io	      = dm355_leopard_map_io,
  	.init_irq     = davinci_irq_init,
  	.init_time	= davinci_timer_init,
  	.init_machine = dm355_leopard_init,
  	.init_late	= davinci_init_late,
  	.dma_zone_size	= SZ_128M,
  	.restart	= davinci_restart,
  MACHINE_END