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

DEFINITIONS

1. gtwx5715_init

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-ixp4xx/gtwx5715-setup.c
   4  *
   5  * Gemtek GTWX5715 (Linksys WRV54G) board setup
   6  *
   7  * Copyright (C) 2004 George T. Joseph
   8  * Derived from Coyote
   9  */
  10 
  11 #include <linux/init.h>
  12 #include <linux/device.h>
  13 #include <linux/serial.h>
  14 #include <linux/tty.h>
  15 #include <linux/serial_8250.h>
  16 #include <asm/types.h>
  17 #include <asm/setup.h>
  18 #include <asm/memory.h>
  19 #include <mach/hardware.h>
  20 #include <asm/irq.h>
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/flash.h>
  24 
  25 #include "irqs.h"
  26 
  27 /* GPIO 5,6,7 and 12 are hard wired to the Kendin KS8995M Switch
  28    and operate as an SPI type interface.  The details of the interface
  29    are available on Kendin/Micrel's web site. */
  30 
  31 #define GTWX5715_KSSPI_SELECT   5
  32 #define GTWX5715_KSSPI_TXD      6
  33 #define GTWX5715_KSSPI_CLOCK    7
  34 #define GTWX5715_KSSPI_RXD      12
  35 
  36 /* The "reset" button is wired to GPIO 3.
  37    The GPIO is brought "low" when the button is pushed. */
  38 
  39 #define GTWX5715_BUTTON_GPIO    3
  40 
  41 /* Board Label      Front Label
  42    LED1             Power
  43    LED2             Wireless-G
  44    LED3             not populated but could be
  45    LED4             Internet
  46    LED5 - LED8      Controlled by KS8995M Switch
  47    LED9             DMZ */
  48 
  49 #define GTWX5715_LED1_GPIO      2
  50 #define GTWX5715_LED2_GPIO      9
  51 #define GTWX5715_LED3_GPIO      8
  52 #define GTWX5715_LED4_GPIO      1
  53 #define GTWX5715_LED9_GPIO      4
  54 
  55 /*
  56  * Xscale UART registers are 32 bits wide with only the least
  57  * significant 8 bits having any meaning.  From a configuration
  58  * perspective, this means 2 things...
  59  *
  60  *   Setting .regshift = 2 so that the standard 16550 registers
  61  *   line up on every 4th byte.
  62  *
  63  *   Shifting the register start virtual address +3 bytes when
  64  *   compiled big-endian.  Since register writes are done on a
  65  *   single byte basis, if the shift isn't done the driver will
  66  *   write the value into the most significant byte of the register,
  67  *   which is ignored, instead of the least significant.
  68  */
  69 
  70 #ifdef  __ARMEB__
  71 #define REG_OFFSET      3
  72 #else
  73 #define REG_OFFSET      0
  74 #endif
  75 
  76 /*
  77  * Only the second or "console" uart is connected on the gtwx5715.
  78  */
  79 
  80 static struct resource gtwx5715_uart_resources[] = {
  81         {
  82                 .start  = IXP4XX_UART2_BASE_PHYS,
  83                 .end    = IXP4XX_UART2_BASE_PHYS + 0x0fff,
  84                 .flags  = IORESOURCE_MEM,
  85         },
  86         {
  87                 .start  = IRQ_IXP4XX_UART2,
  88                 .end    = IRQ_IXP4XX_UART2,
  89                 .flags  = IORESOURCE_IRQ,
  90         },
  91         { },
  92 };
  93 
  94 
  95 static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
  96         {
  97         .mapbase        = IXP4XX_UART2_BASE_PHYS,
  98         .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
  99         .irq            = IRQ_IXP4XX_UART2,
 100         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 101         .iotype         = UPIO_MEM,
 102         .regshift       = 2,
 103         .uartclk        = IXP4XX_UART_XTAL,
 104         },
 105         { },
 106 };
 107 
 108 static struct platform_device gtwx5715_uart_device = {
 109         .name           = "serial8250",
 110         .id             = PLAT8250_DEV_PLATFORM,
 111         .dev                    = {
 112                 .platform_data  = gtwx5715_uart_platform_data,
 113         },
 114         .num_resources  = 2,
 115         .resource       = gtwx5715_uart_resources,
 116 };
 117 
 118 static struct flash_platform_data gtwx5715_flash_data = {
 119         .map_name       = "cfi_probe",
 120         .width          = 2,
 121 };
 122 
 123 static struct resource gtwx5715_flash_resource = {
 124         .flags          = IORESOURCE_MEM,
 125 };
 126 
 127 static struct platform_device gtwx5715_flash = {
 128         .name           = "IXP4XX-Flash",
 129         .id             = 0,
 130         .dev            = {
 131                 .platform_data = &gtwx5715_flash_data,
 132         },
 133         .num_resources  = 1,
 134         .resource       = &gtwx5715_flash_resource,
 135 };
 136 
 137 static struct platform_device *gtwx5715_devices[] __initdata = {
 138         &gtwx5715_uart_device,
 139         &gtwx5715_flash,
 140 };
 141 
 142 static void __init gtwx5715_init(void)
 143 {
 144         ixp4xx_sys_init();
 145 
 146         gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 147         gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
 148 
 149         platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
 150 }
 151 
 152 
 153 MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
 154         /* Maintainer: George Joseph */
 155         .map_io         = ixp4xx_map_io,
 156         .init_early     = ixp4xx_init_early,
 157         .init_irq       = ixp4xx_init_irq,
 158         .init_time      = ixp4xx_timer_init,
 159         .atag_offset    = 0x100,
 160         .init_machine   = gtwx5715_init,
 161 #if defined(CONFIG_PCI)
 162         .dma_zone_size  = SZ_64M,
 163 #endif
 164         .restart        = ixp4xx_restart,
 165 MACHINE_END
 166 
 167