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 #include <mach/imx-uart.h>
  35 #include <mach/iomux-mx3.h>
  36
  37 /*!
  38  * @file mx31ads.c
  39  *
  40  * @brief This file contains the board-specific initialization routines.
  41  *
  42  * @ingroup System
  43  */
  44
  45 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
  46 /*!
  47  * The serial port definition structure.
  48  */
  49 static struct plat_serial8250_port serial_platform_data[] = {
  50         {
  51                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
  52                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA),
  53                 .irq      = EXPIO_INT_XUART_INTA,
  54                 .uartclk  = 14745600,
  55                 .regshift = 0,
  56                 .iotype   = UPIO_MEM,
  57                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  58         }, {
  59                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
  60                 .mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB),
  61                 .irq      = EXPIO_INT_XUART_INTB,
  62                 .uartclk  = 14745600,
  63                 .regshift = 0,
  64                 .iotype   = UPIO_MEM,
  65                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  66         },
  67         {},
  68 };
  69
  70 static struct platform_device serial_device = {
  71         .name   = "serial8250",
  72         .id     = 0,
  73         .dev    = {
  74                 .platform_data = serial_platform_data,
  75         },
  76 };
  77
  78 static int __init mxc_init_extuart(void)
  79 {
  80         return platform_device_register(&serial_device);
  81 }
  82 #else
  83 static inline int mxc_init_extuart(void)
  84 {
  85         return 0;
  86 }
  87 #endif
  88
  89 #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
  90 static struct imxuart_platform_data uart_pdata = {
  91         .flags = IMXUART_HAVE_RTSCTS,
  92 };
  93
  94 static inline void mxc_init_imx_uart(void)
  95 {
  96         mxc_iomux_mode(MX31_PIN_CTS1__CTS1);
  97         mxc_iomux_mode(MX31_PIN_RTS1__RTS1);
  98         mxc_iomux_mode(MX31_PIN_TXD1__TXD1);
  99         mxc_iomux_mode(MX31_PIN_RXD1__RXD1);
 100
 101         mxc_register_device(&mxc_uart_device0, &uart_pdata);
 102 }
 103 #else /* !SERIAL_IMX */
 104 static inline void mxc_init_imx_uart(void)
 105 {
 106 }
 107 #endif /* !SERIAL_IMX */
 108
 109 /*!
 110  * This structure defines static mappings for the i.MX31ADS board.
 111  */
 112 static struct map_desc mx31ads_io_desc[] __initdata = {
 113         {
 114                 .virtual        = AIPS1_BASE_ADDR_VIRT,
 115                 .pfn            = __phys_to_pfn(AIPS1_BASE_ADDR),
 116                 .length         = AIPS1_SIZE,
 117                 .type           = MT_NONSHARED_DEVICE
 118         }, {
 119                 .virtual        = SPBA0_BASE_ADDR_VIRT,
 120                 .pfn            = __phys_to_pfn(SPBA0_BASE_ADDR),
 121                 .length         = SPBA0_SIZE,
 122                 .type           = MT_NONSHARED_DEVICE
 123         }, {
 124                 .virtual        = AIPS2_BASE_ADDR_VIRT,
 125                 .pfn            = __phys_to_pfn(AIPS2_BASE_ADDR),
 126                 .length         = AIPS2_SIZE,
 127                 .type           = MT_NONSHARED_DEVICE
 128         }, {
 129                 .virtual        = CS4_BASE_ADDR_VIRT,
 130                 .pfn            = __phys_to_pfn(CS4_BASE_ADDR),
 131                 .length         = CS4_SIZE / 2,
 132                 .type           = MT_DEVICE
 133         },
 134 };
 135
 136 /*!
 137  * Set up static virtual mappings.
 138  */
 139 void __init mx31ads_map_io(void)
 140 {
 141         mxc_map_io();
 142         iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
 143 }
 144
 145 /*!
 146  * Board specific initialization.
 147  */
 148 static void __init mxc_board_init(void)
 149 {
 150         mxc_init_extuart();
 151         mxc_init_imx_uart();
 152 }
 153
 154 static void __init mx31ads_timer_init(void)
 155 {
 156         mxc_clocks_init(26000000);
 157         mxc_timer_init("ipg_clk.0");
 158 }
 159
 160 struct sys_timer mx31ads_timer = {
 161         .init   = mx31ads_timer_init,
 162 };
 163
 164 /*
 165  * The following uses standard kernel macros defined in arch.h in order to
 166  * initialize __mach_desc_MX31ADS data structure.
 167  */
 168 MACHINE_START(MX31ADS, "Freescale MX31ADS")
 169         /* Maintainer: Freescale Semiconductor, Inc. */
 170         .phys_io        = AIPS1_BASE_ADDR,
 171         .io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 172         .boot_params    = PHYS_OFFSET + 0x100,
 173         .map_io         = mx31ads_map_io,
 174         .init_irq       = mxc_init_irq,
 175         .init_machine   = mxc_board_init,
 176         .timer          = &mx31ads_timer,
 177 MACHINE_END