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