arch/arm/mach-mx3/mx31ads.c

   1 /*
   2  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   3  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
   4  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/types.h>
  22 #include <linux/init.h>
  23 #include <linux/clk.h>
  24 #include <linux/serial_8250.h>
  25
  26 #include <asm/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/memory.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/arch/common.h>
  32
  33 /*!
  34  * @file mx31ads.c
  35  *
  36  * @brief This file contains the board-specific initialization routines.
  37  *
  38  * @ingroup System
  39  */
  40
  41 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  42 /*!
  43  * The serial port definition structure.
  44  */
  45 static struct plat_serial8250_port serial_platform_data[] = {
  46         {
  47                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
  48                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA),
  49                 .irq      = EXPIO_INT_XUART_INTA,
  50                 .uartclk  = 14745600,
  51                 .regshift = 0,
  52                 .iotype   = UPIO_MEM,
  53                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  54         }, {
  55                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
  56                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB),
  57                 .irq      = EXPIO_INT_XUART_INTB,
  58                 .uartclk  = 14745600,
  59                 .regshift = 0,
  60                 .iotype   = UPIO_MEM,
  61                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  62         },
  63         {},
  64 };
  65
  66 static struct platform_device serial_device = {
  67         .name   = "serial8250",
  68         .id     = 0,
  69         .dev    = {
  70                 .platform_data = serial_platform_data,
  71         },
  72 };
  73
  74 static int __init mxc_init_extuart(void)
  75 {
  76         return platform_device_register(&serial_device);
  77 }
  78 #else
  79 static inline int mxc_init_extuart(void)
  80 {
  81         return 0;
  82 }
  83 #endif
  84
  85 /*!
  86  * This structure defines static mappings for the i.MX31ADS board.
  87  */
  88 static struct map_desc mx31ads_io_desc[] __initdata = {
  89         {
  90                 .virtual        = AIPS1_BASE_ADDR_VIRT,
  91                 .pfn            = __phys_to_pfn(AIPS1_BASE_ADDR),
  92                 .length         = AIPS1_SIZE,
  93                 .type           = MT_NONSHARED_DEVICE
  94         }, {
  95                 .virtual        = SPBA0_BASE_ADDR_VIRT,
  96                 .pfn            = __phys_to_pfn(SPBA0_BASE_ADDR),
  97                 .length         = SPBA0_SIZE,
  98                 .type           = MT_NONSHARED_DEVICE
  99         }, {
 100                 .virtual        = AIPS2_BASE_ADDR_VIRT,
 101                 .pfn            = __phys_to_pfn(AIPS2_BASE_ADDR),
 102                 .length         = AIPS2_SIZE,
 103                 .type           = MT_NONSHARED_DEVICE
 104         }, {
 105                 .virtual        = CS4_BASE_ADDR_VIRT,
 106                 .pfn            = __phys_to_pfn(CS4_BASE_ADDR),
 107                 .length         = CS4_SIZE / 2,
 108                 .type           = MT_DEVICE
 109         },
 110 };
 111
 112 /*!
 113  * Set up static virtual mappings.
 114  */
 115 void __init mx31ads_map_io(void)
 116 {
 117         mxc_map_io();
 118         iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
 119 }
 120
 121 /*!
 122  * Board specific initialization.
 123  */
 124 static void __init mxc_board_init(void)
 125 {
 126         mxc_init_extuart();
 127 }
 128
 129 /*
 130  * The following uses standard kernel macros defined in arch.h in order to
 131  * initialize __mach_desc_MX31ADS data structure.
 132  */
 133 MACHINE_START(MX31ADS, "Freescale MX31ADS")
 134         /* Maintainer: Freescale Semiconductor, Inc. */
 135         .phys_io        = AIPS1_BASE_ADDR,
 136         .io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 137         .boot_params    = PHYS_OFFSET + 0x100,
 138         .map_io         = mx31ads_map_io,
 139         .init_irq       = mxc_init_irq,
 140         .init_machine   = mxc_board_init,
 141         .timer          = &mxc_timer,
 142 MACHINE_END