/*
   *  linux/arch/arm/mach-pxa/gumstix.c
   *
   *  Support for the Gumstix motherboards.
   *
   *  Original Author:	Craig Hughes
   *  Created:	Feb 14, 2008
   *  Copyright:	Craig Hughes
   *
   *  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.
   *
   *  Implemented based on lubbock.c by Nicolas Pitre and code from Craig
   *  Hughes
   */
  
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/init.h>
  #include <linux/platform_device.h>
  #include <linux/interrupt.h>
  #include <linux/delay.h>
  #include <linux/mtd/mtd.h>
  #include <linux/mtd/partitions.h>
  #include <linux/gpio.h>
  #include <linux/err.h>
  #include <linux/clk.h>
  #include <linux/usb/gpio_vbus.h>
  
  #include <asm/setup.h>
  #include <asm/memory.h>
  #include <asm/mach-types.h>
  #include <mach/hardware.h>
  #include <asm/irq.h>
  #include <asm/sizes.h>
  
  #include <asm/mach/arch.h>
  #include <asm/mach/map.h>
  #include <asm/mach/irq.h>
  #include <asm/mach/flash.h>
  
  #include <mach/pxa25x.h>
  #include <linux/platform_data/mmc-pxamci.h>
  #include <mach/udc.h>
  #include <mach/gumstix.h>
  
  #include "generic.h"
  
  static struct resource flash_resource = {
  	.start	= 0x00000000,
  	.end	= SZ_64M - 1,
  	.flags	= IORESOURCE_MEM,
  };
  
  static struct mtd_partition gumstix_partitions[] = {
  	{
  		.name =		"Bootloader",
  		.size =		0x00040000,
  		.offset =	0,
  		.mask_flags =	MTD_WRITEABLE  /* force read-only */
  	} , {
  		.name =		"rootfs",
  		.size =		MTDPART_SIZ_FULL,
  		.offset =	MTDPART_OFS_APPEND
  	}
  };
  
  static struct flash_platform_data gumstix_flash_data = {
  	.map_name	= "cfi_probe",
  	.parts		= gumstix_partitions,
  	.nr_parts	= ARRAY_SIZE(gumstix_partitions),
  	.width		= 2,
  };
  
  static struct platform_device gumstix_flash_device = {
  	.name		= "pxa2xx-flash",
  	.id		= 0,
  	.dev = {
  		.platform_data = &gumstix_flash_data,
  	},
  	.resource = &flash_resource,
  	.num_resources = 1,
  };
  
  static struct platform_device *devices[] __initdata = {
  	&gumstix_flash_device,
  };
  
  #ifdef CONFIG_MMC_PXA
  static struct pxamci_platform_data gumstix_mci_platform_data = {
  	.ocr_mask		= MMC_VDD_32_33|MMC_VDD_33_34,
  	.gpio_card_detect 	= -1,
  	.gpio_card_ro		= -1,
  	.gpio_power		= -1,
  };
  
  static void __init gumstix_mmc_init(void)
  {
  	pxa_set_mci_info(&gumstix_mci_platform_data);
  }
  #else
  static void __init gumstix_mmc_init(void)
  {
  	pr_debug("Gumstix mmc disabled
  ");
  }
  #endif
  
  #ifdef CONFIG_USB_PXA25X
  static struct gpio_vbus_mach_info gumstix_udc_info = {
  	.gpio_vbus		= GPIO_GUMSTIX_USB_GPIOn,
  	.gpio_pullup		= GPIO_GUMSTIX_USB_GPIOx,
  };
  
  static struct platform_device gumstix_gpio_vbus = {
  	.name	= "gpio-vbus",
  	.id	= -1,
  	.dev	= {
  		.platform_data	= &gumstix_udc_info,
  	},
  };
  
  static void __init gumstix_udc_init(void)
  {
  	platform_device_register(&gumstix_gpio_vbus);
  }
  #else
  static void gumstix_udc_init(void)
  {
  	pr_debug("Gumstix udc is disabled
  ");
  }
  #endif
  
  #ifdef CONFIG_BT
  /* Normally, the bootloader would have enabled this 32kHz clock but many
  ** boards still have u-boot 1.1.4 so we check if it has been turned on and
  ** if not, we turn it on with a warning message. */
  static void gumstix_setup_bt_clock(void)
  {
  	int timeout = 500;
  
  	if (!(OSCC & OSCC_OOK))
  		pr_warning("32kHz clock was not on. Bootloader may need to "
  				"be updated
  ");
  	else
  		return;
  
  	OSCC |= OSCC_OON;
  	do {
  		if (OSCC & OSCC_OOK)
  			break;
  		udelay(1);
  	} while (--timeout);
  	if (!timeout)
  		pr_err("Failed to start 32kHz clock
  ");
  }
  
  static void __init gumstix_bluetooth_init(void)
  {
  	int err;
  
  	gumstix_setup_bt_clock();
  
  	err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
  	if (err) {
  		pr_err("gumstix: failed request gpio for bluetooth reset
  ");
  		return;
  	}
  
  	err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
  	if (err) {
  		pr_err("gumstix: can't reset bluetooth
  ");
  		return;
  	}
  	gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
  	udelay(100);
  	gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
  }
  #else
  static void gumstix_bluetooth_init(void)
  {
  	pr_debug("Gumstix Bluetooth is disabled
  ");
  }
  #endif
  
  static unsigned long gumstix_pin_config[] __initdata = {
  	GPIO12_32KHz,
  	/* BTUART */
  	GPIO42_HWUART_RXD,
  	GPIO43_HWUART_TXD,
  	GPIO44_HWUART_CTS,
  	GPIO45_HWUART_RTS,
  	/* MMC */
  	GPIO6_MMC_CLK,
  	GPIO53_MMC_CLK,
  	GPIO8_MMC_CS0,
  };
  
  int __attribute__((weak)) am200_init(void)
  {
  	return 0;
  }
  
  int __attribute__((weak)) am300_init(void)
  {
  	return 0;
  }
  
  static void __init carrier_board_init(void)
  {
  	/*
  	 * put carrier/expansion board init here if
  	 * they cannot be detected programatically
  	 */
  	am200_init();
  	am300_init();
  }
  
  static void __init gumstix_init(void)
  {
  	pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
  
  	pxa_set_ffuart_info(NULL);
  	pxa_set_btuart_info(NULL);
  	pxa_set_stuart_info(NULL);
  	pxa_set_hwuart_info(NULL);
  
  	gumstix_bluetooth_init();
  	gumstix_udc_init();
  	gumstix_mmc_init();
  	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
  	carrier_board_init();
  }
  
  MACHINE_START(GUMSTIX, "Gumstix")
  	.atag_offset	= 0x100, /* match u-boot bi_boot_params */
  	.map_io		= pxa25x_map_io,
  	.nr_irqs	= PXA_NR_IRQS,
  	.init_irq	= pxa25x_init_irq,
  	.handle_irq	= pxa25x_handle_irq,
  	.init_time	= pxa_timer_init,
  	.init_machine	= gumstix_init,
  	.restart	= pxa_restart,
  MACHINE_END