arch/arm/mach-ep93xx/micro9.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/arch/arm/mach-ep93xx/micro9.c
   4  *
   5  * Copyright (C) 2006 Contec Steuerungstechnik & Automation GmbH
   6  *                    Manfred Gruber <m.gruber@tirol.com>
   7  * Copyright (C) 2009 Contec Steuerungstechnik & Automation GmbH
   8  *                    Hubert Feurstein <hubert.feurstein@contec.at>
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/io.h>
  15
  16 #include "hardware.h"
  17
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20
  21 #include "soc.h"
  22
  23 /*************************************************************************
  24  * Micro9 NOR Flash
  25  *
  26  * Micro9-High has up to 64MB of 32-bit flash on CS1
  27  * Micro9-Mid has up to 64MB of either 32-bit or 16-bit flash on CS1
  28  * Micro9-Lite uses a separate MTD map driver for flash support
  29  * Micro9-Slim has up to 64MB of either 32-bit or 16-bit flash on CS1
  30  *************************************************************************/
  31 static unsigned int __init micro9_detect_bootwidth(void)
  32 {
  33         u32 v;
  34
  35         /* Detect the bus width of the external flash memory */
  36         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
  37         if (v & EP93XX_SYSCON_SYSCFG_LCSN7)
  38                 return 4; /* 32-bit */
  39         else
  40                 return 2; /* 16-bit */
  41 }
  42
  43 static void __init micro9_register_flash(void)
  44 {
  45         unsigned int width;
  46
  47         if (machine_is_micro9())
  48                 width = 4;
  49         else if (machine_is_micro9m() || machine_is_micro9s())
  50                 width = micro9_detect_bootwidth();
  51         else
  52                 width = 0;
  53
  54         if (width)
  55                 ep93xx_register_flash(width, EP93XX_CS1_PHYS_BASE, SZ_64M);
  56 }
  57
  58
  59 /*************************************************************************
  60  * Micro9 Ethernet
  61  *************************************************************************/
  62 static struct ep93xx_eth_data __initdata micro9_eth_data = {
  63         .phy_id         = 0x1f,
  64 };
  65
  66
  67 static void __init micro9_init_machine(void)
  68 {
  69         ep93xx_init_devices();
  70         ep93xx_register_eth(&micro9_eth_data, 1);
  71         micro9_register_flash();
  72 }
  73
  74
  75 #ifdef CONFIG_MACH_MICRO9H
  76 MACHINE_START(MICRO9, "Contec Micro9-High")
  77         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  78         .atag_offset    = 0x100,
  79         .map_io         = ep93xx_map_io,
  80         .init_irq       = ep93xx_init_irq,
  81         .init_time      = ep93xx_timer_init,
  82         .init_machine   = micro9_init_machine,
  83         .restart        = ep93xx_restart,
  84 MACHINE_END
  85 #endif
  86
  87 #ifdef CONFIG_MACH_MICRO9M
  88 MACHINE_START(MICRO9M, "Contec Micro9-Mid")
  89         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
  90         .atag_offset    = 0x100,
  91         .map_io         = ep93xx_map_io,
  92         .init_irq       = ep93xx_init_irq,
  93         .init_time      = ep93xx_timer_init,
  94         .init_machine   = micro9_init_machine,
  95         .restart        = ep93xx_restart,
  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         .init_time      = ep93xx_timer_init,
 106         .init_machine   = micro9_init_machine,
 107         .restart        = ep93xx_restart,
 108 MACHINE_END
 109 #endif
 110
 111 #ifdef CONFIG_MACH_MICRO9S
 112 MACHINE_START(MICRO9S, "Contec Micro9-Slim")
 113         /* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
 114         .atag_offset    = 0x100,
 115         .map_io         = ep93xx_map_io,
 116         .init_irq       = ep93xx_init_irq,
 117         .init_time      = ep93xx_timer_init,
 118         .init_machine   = micro9_init_machine,
 119         .restart        = ep93xx_restart,
 120 MACHINE_END
 121 #endif