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 "hardware.h"
  20
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23
  24 #include "soc.h"
  25
  26 /*************************************************************************
  27  * Micro9 NOR Flash
  28  *
  29  * Micro9-High has up to 64MB of 32-bit flash on CS1
  30  * Micro9-Mid has up to 64MB of either 32-bit or 16-bit flash on CS1
  31  * Micro9-Lite uses a separate MTD map driver for flash support
  32  * Micro9-Slim has up to 64MB of either 32-bit or 16-bit flash on CS1
  33  *************************************************************************/
  34 static unsigned int __init micro9_detect_bootwidth(void)
  35 {
  36         u32 v;
  37
  38         /* Detect the bus width of the external flash memory */
  39         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
  40         if (v & EP93XX_SYSCON_SYSCFG_LCSN7)
  41                 return 4; /* 32-bit */
  42         else
  43                 return 2; /* 16-bit */
  44 }
  45
  46 static void __init micro9_register_flash(void)
  47 {
  48         unsigned int width;
  49
  50         if (machine_is_micro9())
  51                 width = 4;
  52         else if (machine_is_micro9m() || machine_is_micro9s())
  53                 width = micro9_detect_bootwidth();
  54         else
  55                 width = 0;
  56
  57         if (width)
  58                 ep93xx_register_flash(width, EP93XX_CS1_PHYS_BASE, SZ_64M);
  59 }
  60
  61
  62 /*************************************************************************
  63  * Micro9 Ethernet
  64  *************************************************************************/
  65 static struct ep93xx_eth_data __initdata micro9_eth_data = {
  66         .phy_id         = 0x1f,
  67 };
  68
  69
  70 static void __init micro9_init_machine(void)
  71 {
  72         ep93xx_init_devices();
  73         ep93xx_register_eth(&micro9_eth_data, 1);
  74         micro9_register_flash();
  75 }
  76
  77
  78 #ifdef CONFIG_MACH_MICRO9H
  79 MACHINE_START(MICRO9, "Contec Micro9-High")
  80         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  81         .atag_offset    = 0x100,
  82         .map_io         = ep93xx_map_io,
  83         .init_irq       = ep93xx_init_irq,
  84         .init_time      = ep93xx_timer_init,
  85         .init_machine   = micro9_init_machine,
  86         .init_late      = ep93xx_init_late,
  87         .restart        = ep93xx_restart,
  88 MACHINE_END
  89 #endif
  90
  91 #ifdef CONFIG_MACH_MICRO9M
  92 MACHINE_START(MICRO9M, "Contec Micro9-Mid")
  93         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  94         .atag_offset    = 0x100,
  95         .map_io         = ep93xx_map_io,
  96         .init_irq       = ep93xx_init_irq,
  97         .init_time      = ep93xx_timer_init,
  98         .init_machine   = micro9_init_machine,
  99         .init_late      = ep93xx_init_late,
 100         .restart        = ep93xx_restart,
 101 MACHINE_END
 102 #endif
 103
 104 #ifdef CONFIG_MACH_MICRO9L
 105 MACHINE_START(MICRO9L, "Contec Micro9-Lite")
 106         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
 107         .atag_offset    = 0x100,
 108         .map_io         = ep93xx_map_io,
 109         .init_irq       = ep93xx_init_irq,
 110         .init_time      = ep93xx_timer_init,
 111         .init_machine   = micro9_init_machine,
 112         .init_late      = ep93xx_init_late,
 113         .restart        = ep93xx_restart,
 114 MACHINE_END
 115 #endif
 116
 117 #ifdef CONFIG_MACH_MICRO9S
 118 MACHINE_START(MICRO9S, "Contec Micro9-Slim")
 119         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
 120         .atag_offset    = 0x100,
 121         .map_io         = ep93xx_map_io,
 122         .init_irq       = ep93xx_init_irq,
 123         .init_time      = ep93xx_timer_init,
 124         .init_machine   = micro9_init_machine,
 125         .init_late      = ep93xx_init_late,
 126         .restart        = ep93xx_restart,
 127 MACHINE_END
 128 #endif