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

   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
  80static 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
  95static 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
 108static 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
 118static struct flash_platform_data gtwx5715_flash_data = {
 119        .map_name       = "cfi_probe",
 120        .width          = 2,
 121};
 122
 123static struct resource gtwx5715_flash_resource = {
 124        .flags          = IORESOURCE_MEM,
 125};
 126
 127static 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
 137static struct platform_device *gtwx5715_devices[] __initdata = {
 138        &gtwx5715_uart_device,
 139        &gtwx5715_flash,
 140};
 141
 142static 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
 153MACHINE_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,
 165MACHINE_END
 166
 167
 168