/*
   *  linux/arch/arm/mach-rpc/riscpc.c
   *
   *  Copyright (C) 1998-2001 Russell King
   *
   * 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.
   *
   *  Architecture specific fixups.
   */
  #include <linux/kernel.h>
  #include <linux/tty.h>
  #include <linux/delay.h>
  #include <linux/pm.h>
  #include <linux/init.h>
  #include <linux/sched.h>
  #include <linux/device.h>
  #include <linux/serial_8250.h>
  #include <linux/ata_platform.h>
  #include <linux/io.h>
  #include <linux/i2c.h>
  #include <linux/reboot.h>
  
  #include <asm/elf.h>
  #include <asm/mach-types.h>
  #include <mach/hardware.h>
  #include <asm/hardware/iomd.h>
  #include <asm/page.h>
  #include <asm/domain.h>
  #include <asm/setup.h>
  #include <asm/system_misc.h>
  
  #include <asm/mach/map.h>
  #include <asm/mach/arch.h>
  #include <asm/mach/time.h>
  
  extern void rpc_init_irq(void);
  
  unsigned int vram_size;
  unsigned int memc_ctrl_reg;
  unsigned int number_mfm_drives;
  
  static int __init parse_tag_acorn(const struct tag *tag)
  {
  	memc_ctrl_reg = tag->u.acorn.memc_control_reg;
  	number_mfm_drives = tag->u.acorn.adfsdrives;
  
  	switch (tag->u.acorn.vram_pages) {
  	case 512:
  		vram_size += PAGE_SIZE * 256;
  	case 256:
  		vram_size += PAGE_SIZE * 256;
  	default:
  		break;
  	}
  #if 0
  	if (vram_size) {
  		desc->video_start = 0x02000000;
  		desc->video_end   = 0x02000000 + vram_size;
  	}
  #endif
  	return 0;
  }
  
  __tagtable(ATAG_ACORN, parse_tag_acorn);
  
  static struct map_desc rpc_io_desc[] __initdata = {
   	{	/* VRAM		*/
  		.virtual	=  SCREEN_BASE,
  		.pfn		= __phys_to_pfn(SCREEN_START),
  		.length		= 	2*1048576,
  		.type		= MT_DEVICE
  	}, {	/* IO space	*/
  		.virtual	=  (u32)IO_BASE,
  		.pfn		= __phys_to_pfn(IO_START),
  		.length		= 	IO_SIZE	 ,
  		.type		= MT_DEVICE
  	}, {	/* EASI space	*/
  		.virtual	= (unsigned long)EASI_BASE,
  		.pfn		= __phys_to_pfn(EASI_START),
  		.length		= EASI_SIZE,
  		.type		= MT_DEVICE
  	}
  };
  
  static void __init rpc_map_io(void)
  {
  	iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
  
  	/*
  	 * Turn off floppy.
  	 */
  	writeb(0xc, PCIO_BASE + (0x3f2 << 2));
  
  	/*
  	 * RiscPC can't handle half-word loads and stores
  	 */
  	elf_hwcap &= ~HWCAP_HALF;
  }
  
  static struct resource acornfb_resources[] = {
  	/* VIDC */
  	DEFINE_RES_MEM(0x03400000, 0x00200000),
  	DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
  };
  
  static struct platform_device acornfb_device = {
  	.name			= "acornfb",
  	.id			= -1,
  	.dev			= {
  		.coherent_dma_mask = 0xffffffff,
  	},
  	.num_resources		= ARRAY_SIZE(acornfb_resources),
  	.resource		= acornfb_resources,
  };
  
  static struct resource iomd_resources[] = {
  	DEFINE_RES_MEM(0x03200000, 0x10000),
  };
  
  static struct platform_device iomd_device = {
  	.name			= "iomd",
  	.id			= -1,
  	.num_resources		= ARRAY_SIZE(iomd_resources),
  	.resource		= iomd_resources,
  };
  
  static struct resource iomd_kart_resources[] = {
  	DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
  	DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
  };
  
  static struct platform_device kbd_device = {
  	.name			= "kart",
  	.id			= -1,
  	.dev			= {
  		.parent 	= &iomd_device.dev,
  	},
  	.num_resources		= ARRAY_SIZE(iomd_kart_resources),
  	.resource		= iomd_kart_resources,
  };
  
  static struct plat_serial8250_port serial_platform_data[] = {
  	{
  		.mapbase	= 0x03010fe0,
  		.irq		= IRQ_SERIALPORT,
  		.uartclk	= 1843200,
  		.regshift	= 2,
  		.iotype		= UPIO_MEM,
  		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
  	},
  	{ },
  };
  
  static struct platform_device serial_device = {
  	.name			= "serial8250",
  	.id			= PLAT8250_DEV_PLATFORM,
  	.dev			= {
  		.platform_data	= serial_platform_data,
  	},
  };
  
  static struct pata_platform_info pata_platform_data = {
  	.ioport_shift		= 2,
  };
  
  static struct resource pata_resources[] = {
  	DEFINE_RES_MEM(0x030107c0, 0x20),
  	DEFINE_RES_MEM(0x03010fd8, 0x04),
  	DEFINE_RES_IRQ(IRQ_HARDDISK),
  };
  
  static struct platform_device pata_device = {
  	.name			= "pata_platform",
  	.id			= -1,
  	.num_resources		= ARRAY_SIZE(pata_resources),
  	.resource		= pata_resources,
  	.dev			= {
  		.platform_data	= &pata_platform_data,
  		.coherent_dma_mask = ~0,	/* grumble */
  	},
  };
  
  static struct platform_device *devs[] __initdata = {
  	&iomd_device,
  	&kbd_device,
  	&serial_device,
  	&acornfb_device,
  	&pata_device,
  };
  
  static struct i2c_board_info i2c_rtc = {
  	I2C_BOARD_INFO("pcf8583", 0x50)
  };
  
  static int __init rpc_init(void)
  {
  	i2c_register_board_info(0, &i2c_rtc, 1);
  	return platform_add_devices(devs, ARRAY_SIZE(devs));
  }
  
  arch_initcall(rpc_init);
  
  static void rpc_restart(enum reboot_mode mode, const char *cmd)
  {
  	iomd_writeb(0, IOMD_ROMCR0);
  
  	/*
  	 * Jump into the ROM
  	 */
  	soft_restart(0);
  }
  
  void ioc_timer_init(void);
  
  MACHINE_START(RISCPC, "Acorn-RiscPC")
  	/* Maintainer: Russell King */
  	.atag_offset	= 0x100,
  	.reserve_lp0	= 1,
  	.reserve_lp1	= 1,
  	.map_io		= rpc_map_io,
  	.init_irq	= rpc_init_irq,
  	.init_time	= ioc_timer_init,
  	.restart	= rpc_restart,
  MACHINE_END