/*

   * ATSTK1002/ATSTK1006 daughterboard-specific init code

   *

   * Copyright (C) 2005-2007 Atmel Corporation

   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */

  #include <linux/clk.h>
  #include <linux/etherdevice.h>

  #include <linux/init.h>

  #include <linux/kernel.h>

  #include <linux/platform_device.h>

  #include <linux/string.h>
  #include <linux/types.h>

  #include <linux/spi/spi.h>

  #include <linux/spi/at73c213.h>

  #include <linux/atmel-mci.h>

  #include <video/atmel_lcdc.h>

  #include <asm/io.h>

  #include <asm/setup.h>

  #include <mach/at32ap700x.h>
  #include <mach/board.h>
  #include <mach/init.h>
  #include <mach/portmux.h>

  #include "atstk1000.h"

  /* Oscillator frequencies. These are board specific */
  unsigned long at32_board_osc_rates[3] = {
  	[0] = 32768,	/* 32.768 kHz on RTC osc */
  	[1] = 20000000,	/* 20 MHz on osc0 */
  	[2] = 12000000,	/* 12 MHz on osc1 */
  };

  /*
   * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
   * have the AT32AP7000 chip on board; the difference is that the
   * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
   * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
   * none.)
   *
   * The RAM difference is handled by the boot loader, so the only
   * difference we end up handling here is the NAND flash.
   */
  #ifdef CONFIG_BOARD_ATSTK1006
  #include <linux/mtd/partitions.h>

  #include <mach/smc.h>

  
  static struct smc_timing nand_timing __initdata = {
  	.ncs_read_setup		= 0,
  	.nrd_setup		= 10,
  	.ncs_write_setup	= 0,
  	.nwe_setup		= 10,
  
  	.ncs_read_pulse		= 30,
  	.nrd_pulse		= 15,
  	.ncs_write_pulse	= 30,
  	.nwe_pulse		= 15,
  
  	.read_cycle		= 30,
  	.write_cycle		= 30,
  
  	.ncs_read_recover	= 0,
  	.nrd_recover		= 15,
  	.ncs_write_recover	= 0,
  	/* WE# high -> RE# low min 60 ns */
  	.nwe_recover		= 50,
  };
  
  static struct smc_config nand_config __initdata = {
  	.bus_width		= 1,
  	.nrd_controlled		= 1,
  	.nwe_controlled		= 1,
  	.nwait_mode		= 0,
  	.byte_write		= 0,
  	.tdf_cycles		= 2,
  	.tdf_mode		= 0,
  };
  
  static struct mtd_partition nand_partitions[] = {
  	{
  		.name		= "main",
  		.offset		= 0x00000000,
  		.size		= MTDPART_SIZ_FULL,
  	},
  };

  static struct atmel_nand_data atstk1006_nand_data __initdata = {

  	.cle		= 21,
  	.ale		= 22,
  	.rdy_pin	= GPIO_PIN_PB(30),
  	.enable_pin	= GPIO_PIN_PB(29),

  	.parts		= nand_partitions,
  	.num_parts	= ARRAY_SIZE(num_partitions),

  };
  #endif

  struct eth_addr {
  	u8 addr[6];
  };
  
  static struct eth_addr __initdata hw_addr[2];

  static struct macb_platform_data __initdata eth_data[2] = {

  	{
  		/*
  		 * The MDIO pullups on STK1000 are a bit too weak for
  		 * the autodetection to work properly, so we have to
  		 * mask out everything but the correct address.
  		 */
  		.phy_mask	= ~(1U << 16),
  	},
  	{
  		.phy_mask	= ~(1U << 17),
  	},
  };

  #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC

  static struct at73c213_board_info at73c213_data = {
  	.ssc_id		= 0,
  	.shortname	= "AVR32 STK1000 external DAC",
  };
  #endif

  #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM

  static struct spi_board_info spi0_board_info[] __initdata = {

  #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC

  	{
  		/* AT73C213 */
  		.modalias	= "at73c213",
  		.max_speed_hz	= 200000,
  		.chip_select	= 0,
  		.mode		= SPI_MODE_1,
  		.platform_data	= &at73c213_data,
  	},
  #endif

  	{

  		/* QVGA display */

  		.modalias	= "ltv350qv",

  		.max_speed_hz	= 16000000,

  		.chip_select	= 1,

  		.mode		= SPI_MODE_3,

  	},
  };

  #endif

  #ifdef CONFIG_BOARD_ATSTK100X_SPI1

  static struct spi_board_info spi1_board_info[] __initdata = { {
  	/* patch in custom entries here */
  } };
  #endif

  /*
   * The next two functions should go away as the boot loader is
   * supposed to initialize the macb address registers with a valid
   * ethernet address. But we need to keep it around for a while until
   * we can be reasonably sure the boot loader does this.
   *
   * The phy_id is ignored as the driver will probe for it.
   */

  static int __init parse_tag_ethernet(struct tag *tag)
  {
  	int i;
  
  	i = tag->u.ethernet.mac_index;

  	if (i < ARRAY_SIZE(hw_addr))
  		memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
  		       sizeof(hw_addr[i].addr));

  	return 0;
  }
  __tagtable(ATAG_ETHERNET, parse_tag_ethernet);

  static void __init set_hw_addr(struct platform_device *pdev)
  {
  	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	const u8 *addr;
  	void __iomem *regs;
  	struct clk *pclk;
  
  	if (!res)
  		return;
  	if (pdev->id >= ARRAY_SIZE(hw_addr))
  		return;
  
  	addr = hw_addr[pdev->id].addr;
  	if (!is_valid_ether_addr(addr))
  		return;
  
  	/*
  	 * Since this is board-specific code, we'll cheat and use the
  	 * physical address directly as we happen to know that it's
  	 * the same as the virtual address.
  	 */
  	regs = (void __iomem __force *)res->start;
  	pclk = clk_get(&pdev->dev, "pclk");

  	if (IS_ERR(pclk))

  		return;
  
  	clk_enable(pclk);
  	__raw_writel((addr[3] << 24) | (addr[2] << 16)
  		     | (addr[1] << 8) | addr[0], regs + 0x98);
  	__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
  	clk_disable(pclk);
  	clk_put(pclk);
  }

  #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  static void __init atstk1002_setup_extdac(void)

  {
  	struct clk *gclk;
  	struct clk *pll;
  
  	gclk = clk_get(NULL, "gclk0");
  	if (IS_ERR(gclk))
  		goto err_gclk;
  	pll = clk_get(NULL, "pll0");
  	if (IS_ERR(pll))
  		goto err_pll;
  
  	if (clk_set_parent(gclk, pll)) {
  		pr_debug("STK1000: failed to set pll0 as parent for DAC clock
  ");
  		goto err_set_clk;
  	}

  	at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);

  	at73c213_data.dac_clk = gclk;

  
  err_set_clk:
  	clk_put(pll);
  err_pll:
  	clk_put(gclk);
  err_gclk:
  	return;
  }

  #else
  static void __init atstk1002_setup_extdac(void)
  {
  
  }
  #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */

  void __init setup_board(void)
  {

  #ifdef	CONFIG_BOARD_ATSTK100X_SW2_CUSTOM

  	at32_map_usart(0, 1, 0);	/* USART 0/B: /dev/ttyS1, IRDA */

  #else

  	at32_map_usart(1, 0, 0);	/* USART 1/A: /dev/ttyS0, DB9 */

  #endif
  	/* USART 2/unused: expansion connector */

  	at32_map_usart(3, 2, 0);	/* USART 3/C: /dev/ttyS2, DB9 */

  
  	at32_setup_serial_console(0);
  }

  #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM

  static struct mci_platform_data __initdata mci0_data = {
  	.slot[0] = {
  		.bus_width	= 4,

  /* MMC card detect requires MACB0 *NOT* be used */
  #ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM

  		.detect_pin	= GPIO_PIN_PC(14), /* gpio30/sdcd */
  		.wp_pin		= GPIO_PIN_PC(15), /* gpio31/sdwp */

  #else

  		.detect_pin	= -ENODEV,
  		.wp_pin		= -ENODEV,

  #endif	/* SW6 for sd{cd,wp} routing */

  	},
  };

  
  #endif	/* SW2 for MMC signal routing */

  static int __init atstk1002_init(void)
  {

  	/*
  	 * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
  	 * SDRAM-specific pins so that nobody messes with them.
  	 */

  	at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);

  #ifdef CONFIG_BOARD_ATSTK1006
  	smc_set_timing(&nand_config, &nand_timing);
  	smc_set_configuration(3, &nand_config);
  	at32_add_device_nand(0, &atstk1006_nand_data);
  #endif

  #ifdef	CONFIG_BOARD_ATSTK100X_SW2_CUSTOM

  	at32_add_device_usart(1);

  #else
  	at32_add_device_usart(0);

  #endif

  	at32_add_device_usart(2);

  #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM

  	set_hw_addr(at32_add_device_eth(0, &eth_data[0]));

  #endif

  #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM

  	at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));

  #endif

  #ifdef CONFIG_BOARD_ATSTK100X_SPI1

  	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
  #endif

  #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM

  	at32_add_device_mci(0, &mci0_data);

  #endif

  #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
  	set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
  #else

  	at32_add_device_lcdc(0, &atstk1000_lcdc_data,

  			     fbmem_start, fbmem_size,
  			     ATMEL_LCDC_PRI_24BIT | ATMEL_LCDC_PRI_CONTROL);

  #endif

  	at32_add_device_usba(0, NULL);

  #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM

  	at32_add_device_ssc(0, ATMEL_SSC_TX);
  #endif

  	atstk1000_setup_j2_leds();

  	atstk1002_setup_extdac();

  	return 0;
  }
  postcore_initcall(atstk1002_init);