linux/arch/arm/mach-iop32x/em7210.c
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   1/*
   2 * arch/arm/mach-iop32x/em7210.c
   3 *
   4 * Board support code for the Lanner EM7210 platforms.
   5 *
   6 * Based on arch/arm/mach-iop32x/iq31244.c file.
   7 *
   8 * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 *
  14 */
  15
  16#include <linux/mm.h>
  17#include <linux/init.h>
  18#include <linux/kernel.h>
  19#include <linux/pci.h>
  20#include <linux/pm.h>
  21#include <linux/serial_core.h>
  22#include <linux/serial_8250.h>
  23#include <linux/mtd/physmap.h>
  24#include <linux/platform_device.h>
  25#include <linux/i2c.h>
  26#include <mach/hardware.h>
  27#include <linux/io.h>
  28#include <linux/irq.h>
  29#include <asm/mach/arch.h>
  30#include <asm/mach/map.h>
  31#include <asm/mach/pci.h>
  32#include <asm/mach/time.h>
  33#include <asm/mach-types.h>
  34#include <mach/time.h>
  35
  36static void __init em7210_timer_init(void)
  37{
  38        /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
  39        /* 33.333 MHz crystal.                                */
  40        iop_init_time(200000000);
  41}
  42
  43static struct sys_timer em7210_timer = {
  44        .init           = em7210_timer_init,
  45};
  46
  47/*
  48 * EM7210 RTC
  49 */
  50static struct i2c_board_info __initdata em7210_i2c_devices[] = {
  51        {
  52                I2C_BOARD_INFO("rs5c372a", 0x32),
  53        },
  54};
  55
  56/*
  57 * EM7210 I/O
  58 */
  59static struct map_desc em7210_io_desc[] __initdata = {
  60        {       /* on-board devices */
  61                .virtual        = IQ31244_UART,
  62                .pfn            = __phys_to_pfn(IQ31244_UART),
  63                .length         = 0x00100000,
  64                .type           = MT_DEVICE,
  65        },
  66};
  67
  68void __init em7210_map_io(void)
  69{
  70        iop3xx_map_io();
  71        iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
  72}
  73
  74
  75/*
  76 * EM7210 PCI
  77 */
  78#define INTA    IRQ_IOP32X_XINT0
  79#define INTB    IRQ_IOP32X_XINT1
  80#define INTC    IRQ_IOP32X_XINT2
  81#define INTD    IRQ_IOP32X_XINT3
  82
  83static int __init
  84em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  85{
  86        static int pci_irq_table[][4] = {
  87                /*
  88                 * PCI IDSEL/INTPIN->INTLINE
  89                 * A       B       C       D
  90                 */
  91                {INTB, INTB, INTB, INTB}, /* console / uart */
  92                {INTA, INTA, INTA, INTA}, /* 1st 82541      */
  93                {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
  94                {INTC, INTC, INTC, INTC}, /* GD31244        */
  95                {INTD, INTA, INTA, INTA}, /* mini-PCI       */
  96                {INTD, INTC, INTA, INTA}, /* NEC USB        */
  97        };
  98
  99        if (pin < 1 || pin > 4)
 100                return -1;
 101
 102        return pci_irq_table[slot % 6][pin - 1];
 103}
 104
 105static struct hw_pci em7210_pci __initdata = {
 106        .swizzle        = pci_std_swizzle,
 107        .nr_controllers = 1,
 108        .setup          = iop3xx_pci_setup,
 109        .preinit        = iop3xx_pci_preinit,
 110        .scan           = iop3xx_pci_scan_bus,
 111        .map_irq        = em7210_pci_map_irq,
 112};
 113
 114static int __init em7210_pci_init(void)
 115{
 116        if (machine_is_em7210())
 117                pci_common_init(&em7210_pci);
 118
 119        return 0;
 120}
 121
 122subsys_initcall(em7210_pci_init);
 123
 124
 125/*
 126 * EM7210 Flash
 127 */
 128static struct physmap_flash_data em7210_flash_data = {
 129        .width          = 2,
 130};
 131
 132static struct resource em7210_flash_resource = {
 133        .start          = 0xf0000000,
 134        .end            = 0xf1ffffff,
 135        .flags          = IORESOURCE_MEM,
 136};
 137
 138static struct platform_device em7210_flash_device = {
 139        .name           = "physmap-flash",
 140        .id             = 0,
 141        .dev            = {
 142                .platform_data  = &em7210_flash_data,
 143        },
 144        .num_resources  = 1,
 145        .resource       = &em7210_flash_resource,
 146};
 147
 148
 149/*
 150 * EM7210 UART
 151 * The physical address of the serial port is 0xfe800000,
 152 * so it can be used for physical and virtual address.
 153 */
 154static struct plat_serial8250_port em7210_serial_port[] = {
 155        {
 156                .mapbase        = IQ31244_UART,
 157                .membase        = (char *)IQ31244_UART,
 158                .irq            = IRQ_IOP32X_XINT1,
 159                .flags          = UPF_SKIP_TEST,
 160                .iotype         = UPIO_MEM,
 161                .regshift       = 0,
 162                .uartclk        = 1843200,
 163        },
 164        { },
 165};
 166
 167static struct resource em7210_uart_resource = {
 168        .start          = IQ31244_UART,
 169        .end            = IQ31244_UART + 7,
 170        .flags          = IORESOURCE_MEM,
 171};
 172
 173static struct platform_device em7210_serial_device = {
 174        .name           = "serial8250",
 175        .id             = PLAT8250_DEV_PLATFORM,
 176        .dev            = {
 177                .platform_data          = em7210_serial_port,
 178        },
 179        .num_resources  = 1,
 180        .resource       = &em7210_uart_resource,
 181};
 182
 183void em7210_power_off(void)
 184{
 185        *IOP3XX_GPOE &= 0xfe;
 186        *IOP3XX_GPOD |= 0x01;
 187}
 188
 189static void __init em7210_init_machine(void)
 190{
 191        platform_device_register(&em7210_serial_device);
 192        platform_device_register(&iop3xx_i2c0_device);
 193        platform_device_register(&iop3xx_i2c1_device);
 194        platform_device_register(&em7210_flash_device);
 195        platform_device_register(&iop3xx_dma_0_channel);
 196        platform_device_register(&iop3xx_dma_1_channel);
 197
 198        i2c_register_board_info(0, em7210_i2c_devices,
 199                ARRAY_SIZE(em7210_i2c_devices));
 200
 201
 202        pm_power_off = em7210_power_off;
 203}
 204
 205MACHINE_START(EM7210, "Lanner EM7210")
 206        .atag_offset    = 0x100,
 207        .map_io         = em7210_map_io,
 208        .init_irq       = iop32x_init_irq,
 209        .timer          = &em7210_timer,
 210        .init_machine   = em7210_init_machine,
 211MACHINE_END
 212