arch/arm/mach-ixp4xx/gtwx5715-setup.c

   1 /*
   2  * arch/arm/mach-ixp4xx/gtwx5715-setup.c
   3  *
   4  * Gemtek GTWX5715 (Linksys WRV54G) board setup
   5  *
   6  * Copyright (C) 2004 George T. Joseph
   7  * Derived from Coyote
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/device.h>
  27 #include <linux/serial.h>
  28 #include <linux/tty.h>
  29 #include <linux/serial_8250.h>
  30 #include <linux/slab.h>
  31
  32 #include <asm/types.h>
  33 #include <asm/setup.h>
  34 #include <asm/memory.h>
  35 #include <mach/hardware.h>
  36 #include <asm/irq.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/flash.h>
  40 #include <mach/gtwx5715.h>
  41
  42 /*
  43  * Xscale UART registers are 32 bits wide with only the least
  44  * significant 8 bits having any meaning.  From a configuration
  45  * perspective, this means 2 things...
  46  *
  47  *   Setting .regshift = 2 so that the standard 16550 registers
  48  *   line up on every 4th byte.
  49  *
  50  *   Shifting the register start virtual address +3 bytes when
  51  *   compiled big-endian.  Since register writes are done on a
  52  *   single byte basis, if the shift isn't done the driver will
  53  *   write the value into the most significant byte of the register,
  54  *   which is ignored, instead of the least significant.
  55  */
  56
  57 #ifdef  __ARMEB__
  58 #define REG_OFFSET      3
  59 #else
  60 #define REG_OFFSET      0
  61 #endif
  62
  63 /*
  64  * Only the second or "console" uart is connected on the gtwx5715.
  65  */
  66
  67 static struct resource gtwx5715_uart_resources[] = {
  68         {
  69                 .start  = IXP4XX_UART2_BASE_PHYS,
  70                 .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  71                 .flags  = IORESOURCE_MEM,
  72         },
  73         {
  74                 .start  = IRQ_IXP4XX_UART2,
  75                 .end    = IRQ_IXP4XX_UART2,
  76                 .flags  = IORESOURCE_IRQ,
  77         },
  78         { },
  79 };
  80
  81
  82 static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
  83         {
  84         .mapbase        = IXP4XX_UART2_BASE_PHYS,
  85         .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
  86         .irq            = IRQ_IXP4XX_UART2,
  87         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  88         .iotype         = UPIO_MEM,
  89         .regshift       = 2,
  90         .uartclk        = IXP4XX_UART_XTAL,
  91         },
  92         { },
  93 };
  94
  95 static struct platform_device gtwx5715_uart_device = {
  96         .name           = "serial8250",
  97         .id             = PLAT8250_DEV_PLATFORM,
  98         .dev                    = {
  99                 .platform_data  = gtwx5715_uart_platform_data,
 100         },
 101         .num_resources  = 2,
 102         .resource       = gtwx5715_uart_resources,
 103 };
 104
 105 static struct flash_platform_data gtwx5715_flash_data = {
 106         .map_name       = "cfi_probe",
 107         .width          = 2,
 108 };
 109
 110 static struct resource gtwx5715_flash_resource = {
 111         .flags          = IORESOURCE_MEM,
 112 };
 113
 114 static struct platform_device gtwx5715_flash = {
 115         .name           = "IXP4XX-Flash",
 116         .id             = 0,
 117         .dev            = {
 118                 .platform_data = &gtwx5715_flash_data,
 119         },
 120         .num_resources  = 1,
 121         .resource       = &gtwx5715_flash_resource,
 122 };
 123
 124 static struct platform_device *gtwx5715_devices[] __initdata = {
 125         &gtwx5715_uart_device,
 126         &gtwx5715_flash,
 127 };
 128
 129 static void __init gtwx5715_init(void)
 130 {
 131         ixp4xx_sys_init();
 132
 133         gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 134         gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
 135
 136         platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 137 }
 138
 139
 140 MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 141         /* Maintainer: George Joseph */
 142         .phys_io        = IXP4XX_UART2_BASE_PHYS,
 143         .io_pg_offst    = ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
 144         .map_io         = ixp4xx_map_io,
 145         .init_irq       = ixp4xx_init_irq,
 146         .timer          = &ixp4xx_timer,
 147         .boot_params    = 0x0100,
 148         .init_machine   = gtwx5715_init,
 149 MACHINE_END
 150
 151