arch/arm/mach-ep93xx/micro9.c

   1 /*
   2  *  linux/arch/arm/mach-ep93xx/micro9.c
   3  *
   4  * Copyright (C) 2006 Contec Steuerungstechnik & Automation GmbH
   5  *                    Manfred Gruber <m.gruber@tirol.com>
   6  * Copyright (C) 2009 Contec Steuerungstechnik & Automation GmbH
   7  *                    Hubert Feurstein <hubert.feurstein@contec.at>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/io.h>
  18
  19 #include <mach/hardware.h>
  20
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23
  24
  25 /*************************************************************************
  26  * Micro9 NOR Flash
  27  *
  28  * Micro9-High has up to 64MB of 32-bit flash on CS1
  29  * Micro9-Mid has up to 64MB of either 32-bit or 16-bit flash on CS1
  30  * Micro9-Lite uses a separate MTD map driver for flash support
  31  * Micro9-Slim has up to 64MB of either 32-bit or 16-bit flash on CS1
  32  *************************************************************************/
  33 static unsigned int __init micro9_detect_bootwidth(void)
  34 {
  35         u32 v;
  36
  37         /* Detect the bus width of the external flash memory */
  38         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
  39         if (v & EP93XX_SYSCON_SYSCFG_LCSN7)
  40                 return 4; /* 32-bit */
  41         else
  42                 return 2; /* 16-bit */
  43 }
  44
  45 static void __init micro9_register_flash(void)
  46 {
  47         unsigned int width;
  48
  49         if (machine_is_micro9())
  50                 width = 4;
  51         else if (machine_is_micro9m() || machine_is_micro9s())
  52                 width = micro9_detect_bootwidth();
  53         else
  54                 width = 0;
  55
  56         if (width)
  57                 ep93xx_register_flash(width, EP93XX_CS1_PHYS_BASE, SZ_64M);
  58 }
  59
  60
  61 /*************************************************************************
  62  * Micro9 Ethernet
  63  *************************************************************************/
  64 static struct ep93xx_eth_data __initdata micro9_eth_data = {
  65         .phy_id         = 0x1f,
  66 };
  67
  68
  69 static void __init micro9_init_machine(void)
  70 {
  71         ep93xx_init_devices();
  72         ep93xx_register_eth(&micro9_eth_data, 1);
  73         micro9_register_flash();
  74 }
  75
  76
  77 #ifdef CONFIG_MACH_MICRO9H
  78 MACHINE_START(MICRO9, "Contec Micro9-High")
  79         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  80         .atag_offset    = 0x100,
  81         .map_io         = ep93xx_map_io,
  82         .init_irq       = ep93xx_init_irq,
  83         .timer          = &ep93xx_timer,
  84         .init_machine   = micro9_init_machine,
  85 MACHINE_END
  86 #endif
  87
  88 #ifdef CONFIG_MACH_MICRO9M
  89 MACHINE_START(MICRO9M, "Contec Micro9-Mid")
  90         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  91         .atag_offset    = 0x100,
  92         .map_io         = ep93xx_map_io,
  93         .init_irq       = ep93xx_init_irq,
  94         .timer          = &ep93xx_timer,
  95         .init_machine   = micro9_init_machine,
  96 MACHINE_END
  97 #endif
  98
  99 #ifdef CONFIG_MACH_MICRO9L
 100 MACHINE_START(MICRO9L, "Contec Micro9-Lite")
 101         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
 102         .atag_offset    = 0x100,
 103         .map_io         = ep93xx_map_io,
 104         .init_irq       = ep93xx_init_irq,
 105         .timer          = &ep93xx_timer,
 106         .init_machine   = micro9_init_machine,
 107 MACHINE_END
 108 #endif
 109
 110 #ifdef CONFIG_MACH_MICRO9S
 111 MACHINE_START(MICRO9S, "Contec Micro9-Slim")
 112         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
 113         .atag_offset    = 0x100,
 114         .map_io         = ep93xx_map_io,
 115         .init_irq       = ep93xx_init_irq,
 116         .timer          = &ep93xx_timer,
 117         .init_machine   = micro9_init_machine,
 118 MACHINE_END
 119 #endif