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 <mach/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/time.h>
  30 #include <asm/memory.h>
  31 #include <asm/mach/map.h>
  32 #include <mach/common.h>
  33 #include <mach/board-mx31ads.h>
  34
  35 /*!
  36  * @file mx31ads.c
  37  *
  38  * @brief This file contains the board-specific initialization routines.
  39  *
  40  * @ingroup System
  41  */
  42
  43 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  44 /*!
  45  * The serial port definition structure.
  46  */
  47 static struct plat_serial8250_port serial_platform_data[] = {
  48         {
  49                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
  50                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA),
  51                 .irq      = EXPIO_INT_XUART_INTA,
  52                 .uartclk  = 14745600,
  53                 .regshift = 0,
  54                 .iotype   = UPIO_MEM,
  55                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  56         }, {
  57                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
  58                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB),
  59                 .irq      = EXPIO_INT_XUART_INTB,
  60                 .uartclk  = 14745600,
  61                 .regshift = 0,
  62                 .iotype   = UPIO_MEM,
  63                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  64         },
  65         {},
  66 };
  67
  68 static struct platform_device serial_device = {
  69         .name   = "serial8250",
  70         .id     = 0,
  71         .dev    = {
  72                 .platform_data = serial_platform_data,
  73         },
  74 };
  75
  76 static int __init mxc_init_extuart(void)
  77 {
  78         return platform_device_register(&serial_device);
  79 }
  80 #else
  81 static inline int mxc_init_extuart(void)
  82 {
  83         return 0;
  84 }
  85 #endif
  86
  87 /*!
  88  * This structure defines static mappings for the i.MX31ADS board.
  89  */
  90 static struct map_desc mx31ads_io_desc[] __initdata = {
  91         {
  92                 .virtual        = AIPS1_BASE_ADDR_VIRT,
  93                 .pfn            = __phys_to_pfn(AIPS1_BASE_ADDR),
  94                 .length         = AIPS1_SIZE,
  95                 .type           = MT_NONSHARED_DEVICE
  96         }, {
  97                 .virtual        = SPBA0_BASE_ADDR_VIRT,
  98                 .pfn            = __phys_to_pfn(SPBA0_BASE_ADDR),
  99                 .length         = SPBA0_SIZE,
 100                 .type           = MT_NONSHARED_DEVICE
 101         }, {
 102                 .virtual        = AIPS2_BASE_ADDR_VIRT,
 103                 .pfn            = __phys_to_pfn(AIPS2_BASE_ADDR),
 104                 .length         = AIPS2_SIZE,
 105                 .type           = MT_NONSHARED_DEVICE
 106         }, {
 107                 .virtual        = CS4_BASE_ADDR_VIRT,
 108                 .pfn            = __phys_to_pfn(CS4_BASE_ADDR),
 109                 .length         = CS4_SIZE / 2,
 110                 .type           = MT_DEVICE
 111         },
 112 };
 113
 114 /*!
 115  * Set up static virtual mappings.
 116  */
 117 void __init mx31ads_map_io(void)
 118 {
 119         mxc_map_io();
 120         iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
 121 }
 122
 123 /*!
 124  * Board specific initialization.
 125  */
 126 static void __init mxc_board_init(void)
 127 {
 128         mxc_init_extuart();
 129 }
 130
 131 static void __init mx31ads_timer_init(void)
 132 {
 133         mxc_clocks_init(26000000);
 134         mxc_timer_init("ipg_clk.0");
 135 }
 136
 137 struct sys_timer mx31ads_timer = {
 138         .init   = mx31ads_timer_init,
 139 };
 140
 141 /*
 142  * The following uses standard kernel macros defined in arch.h in order to
 143  * initialize __mach_desc_MX31ADS data structure.
 144  */
 145 MACHINE_START(MX31ADS, "Freescale MX31ADS")
 146         /* Maintainer: Freescale Semiconductor, Inc. */
 147         .phys_io        = AIPS1_BASE_ADDR,
 148         .io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 149         .boot_params    = PHYS_OFFSET + 0x100,
 150         .map_io         = mx31ads_map_io,
 151         .init_irq       = mxc_init_irq,
 152         .init_machine   = mxc_board_init,
 153         .timer          = &mx31ads_timer,
 154 MACHINE_END