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kernel/linux-imx6_3.14.28/arch/arm/mach-ep93xx/micro9.c 3.48 KB
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  /*
   *  linux/arch/arm/mach-ep93xx/micro9.c
   *
   * Copyright (C) 2006 Contec Steuerungstechnik & Automation GmbH
   *                    Manfred Gruber <m.gruber@tirol.com>
   * Copyright (C) 2009 Contec Steuerungstechnik & Automation GmbH
   *                    Hubert Feurstein <hubert.feurstein@contec.at>
   *
   * 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/kernel.h>
  #include <linux/init.h>
  #include <linux/platform_device.h>
  #include <linux/io.h>
  
  #include <mach/hardware.h>
  
  #include <asm/mach-types.h>
  #include <asm/mach/arch.h>
  
  #include "soc.h"
  
  /*************************************************************************
   * Micro9 NOR Flash
   *
   * Micro9-High has up to 64MB of 32-bit flash on CS1
   * Micro9-Mid has up to 64MB of either 32-bit or 16-bit flash on CS1
   * Micro9-Lite uses a separate MTD map driver for flash support
   * Micro9-Slim has up to 64MB of either 32-bit or 16-bit flash on CS1
   *************************************************************************/
  static unsigned int __init micro9_detect_bootwidth(void)
  {
  	u32 v;
  
  	/* Detect the bus width of the external flash memory */
  	v = __raw_readl(EP93XX_SYSCON_SYSCFG);
  	if (v & EP93XX_SYSCON_SYSCFG_LCSN7)
  		return 4; /* 32-bit */
  	else
  		return 2; /* 16-bit */
  }
  
  static void __init micro9_register_flash(void)
  {
  	unsigned int width;
  
  	if (machine_is_micro9())
  		width = 4;
  	else if (machine_is_micro9m() || machine_is_micro9s())
  		width = micro9_detect_bootwidth();
  	else
  		width = 0;
  
  	if (width)
  		ep93xx_register_flash(width, EP93XX_CS1_PHYS_BASE, SZ_64M);
  }
  
  
  /*************************************************************************
   * Micro9 Ethernet
   *************************************************************************/
  static struct ep93xx_eth_data __initdata micro9_eth_data = {
  	.phy_id		= 0x1f,
  };
  
  
  static void __init micro9_init_machine(void)
  {
  	ep93xx_init_devices();
  	ep93xx_register_eth(&micro9_eth_data, 1);
  	micro9_register_flash();
  }
  
  
  #ifdef CONFIG_MACH_MICRO9H
  MACHINE_START(MICRO9, "Contec Micro9-High")
  	/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  	.atag_offset	= 0x100,
  	.map_io		= ep93xx_map_io,
  	.init_irq	= ep93xx_init_irq,
  	.init_time	= ep93xx_timer_init,
  	.init_machine	= micro9_init_machine,
  	.init_late	= ep93xx_init_late,
  	.restart	= ep93xx_restart,
  MACHINE_END
  #endif
  
  #ifdef CONFIG_MACH_MICRO9M
  MACHINE_START(MICRO9M, "Contec Micro9-Mid")
  	/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  	.atag_offset	= 0x100,
  	.map_io		= ep93xx_map_io,
  	.init_irq	= ep93xx_init_irq,
  	.init_time	= ep93xx_timer_init,
  	.init_machine	= micro9_init_machine,
  	.init_late	= ep93xx_init_late,
  	.restart	= ep93xx_restart,
  MACHINE_END
  #endif
  
  #ifdef CONFIG_MACH_MICRO9L
  MACHINE_START(MICRO9L, "Contec Micro9-Lite")
  	/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  	.atag_offset	= 0x100,
  	.map_io		= ep93xx_map_io,
  	.init_irq	= ep93xx_init_irq,
  	.init_time	= ep93xx_timer_init,
  	.init_machine	= micro9_init_machine,
  	.init_late	= ep93xx_init_late,
  	.restart	= ep93xx_restart,
  MACHINE_END
  #endif
  
  #ifdef CONFIG_MACH_MICRO9S
  MACHINE_START(MICRO9S, "Contec Micro9-Slim")
  	/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  	.atag_offset	= 0x100,
  	.map_io		= ep93xx_map_io,
  	.init_irq	= ep93xx_init_irq,
  	.init_time	= ep93xx_timer_init,
  	.init_machine	= micro9_init_machine,
  	.init_late	= ep93xx_init_late,
  	.restart	= ep93xx_restart,
  MACHINE_END
  #endif