linux/arch/arm/mach-iop32x/n2100.c
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   1/*
   2 * arch/arm/mach-iop32x/n2100.c
   3 *
   4 * Board support code for the Thecus N2100 platform.
   5 *
   6 * Author: Rory Bolt <rorybolt@pacbell.net>
   7 * Copyright (C) 2002 Rory Bolt
   8 * Copyright 2003 (c) MontaVista, Software, Inc.
   9 * Copyright (C) 2004 Intel Corp.
  10 *
  11 * This program is free software; you can redistribute it and/or modify it
  12 * under the terms of the GNU General Public License as published by the
  13 * Free Software Foundation; either version 2 of the License, or (at your
  14 * option) any later version.
  15 */
  16
  17#include <linux/mm.h>
  18#include <linux/init.h>
  19#include <linux/f75375s.h>
  20#include <linux/leds-pca9532.h>
  21#include <linux/delay.h>
  22#include <linux/kernel.h>
  23#include <linux/pci.h>
  24#include <linux/pm.h>
  25#include <linux/string.h>
  26#include <linux/serial_core.h>
  27#include <linux/serial_8250.h>
  28#include <linux/mtd/physmap.h>
  29#include <linux/i2c.h>
  30#include <linux/platform_device.h>
  31#include <linux/reboot.h>
  32#include <linux/io.h>
  33#include <linux/gpio.h>
  34#include <mach/hardware.h>
  35#include <asm/irq.h>
  36#include <asm/mach/arch.h>
  37#include <asm/mach/map.h>
  38#include <asm/mach/pci.h>
  39#include <asm/mach/time.h>
  40#include <asm/mach-types.h>
  41#include <asm/page.h>
  42#include <asm/pgtable.h>
  43#include <mach/time.h>
  44#include "gpio-iop32x.h"
  45
  46/*
  47 * N2100 timer tick configuration.
  48 */
  49static void __init n2100_timer_init(void)
  50{
  51        /* 33.000 MHz crystal.  */
  52        iop_init_time(198000000);
  53}
  54
  55
  56/*
  57 * N2100 I/O.
  58 */
  59static struct map_desc n2100_io_desc[] __initdata = {
  60        {       /* on-board devices */
  61                .virtual        = N2100_UART,
  62                .pfn            = __phys_to_pfn(N2100_UART),
  63                .length         = 0x00100000,
  64                .type           = MT_DEVICE
  65        },
  66};
  67
  68void __init n2100_map_io(void)
  69{
  70        iop3xx_map_io();
  71        iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  72}
  73
  74
  75/*
  76 * N2100 PCI.
  77 */
  78static int __init
  79n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  80{
  81        int irq;
  82
  83        if (PCI_SLOT(dev->devfn) == 1) {
  84                /* RTL8110SB #1 */
  85                irq = IRQ_IOP32X_XINT0;
  86        } else if (PCI_SLOT(dev->devfn) == 2) {
  87                /* RTL8110SB #2 */
  88                irq = IRQ_IOP32X_XINT3;
  89        } else if (PCI_SLOT(dev->devfn) == 3) {
  90                /* Sil3512 */
  91                irq = IRQ_IOP32X_XINT2;
  92        } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  93                /* VT6212 INTA */
  94                irq = IRQ_IOP32X_XINT1;
  95        } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  96                /* VT6212 INTB */
  97                irq = IRQ_IOP32X_XINT0;
  98        } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
  99                /* VT6212 INTC */
 100                irq = IRQ_IOP32X_XINT2;
 101        } else if (PCI_SLOT(dev->devfn) == 5) {
 102                /* Mini-PCI slot */
 103                irq = IRQ_IOP32X_XINT3;
 104        } else {
 105                printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 106                        "device PCI:%d:%d:%d\n", dev->bus->number,
 107                        PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 108                irq = -1;
 109        }
 110
 111        return irq;
 112}
 113
 114static struct hw_pci n2100_pci __initdata = {
 115        .nr_controllers = 1,
 116        .ops            = &iop3xx_ops,
 117        .setup          = iop3xx_pci_setup,
 118        .preinit        = iop3xx_pci_preinit,
 119        .map_irq        = n2100_pci_map_irq,
 120};
 121
 122/*
 123 * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 124 * the ->broken_parity_status flag for both ports so that the r8169
 125 * driver knows it should ignore error interrupts.
 126 */
 127static void n2100_fixup_r8169(struct pci_dev *dev)
 128{
 129        if (dev->bus->number == 0 &&
 130            (dev->devfn == PCI_DEVFN(1, 0) ||
 131             dev->devfn == PCI_DEVFN(2, 0)))
 132                dev->broken_parity_status = 1;
 133}
 134DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 135
 136static int __init n2100_pci_init(void)
 137{
 138        if (machine_is_n2100())
 139                pci_common_init(&n2100_pci);
 140
 141        return 0;
 142}
 143
 144subsys_initcall(n2100_pci_init);
 145
 146
 147/*
 148 * N2100 machine initialisation.
 149 */
 150static struct physmap_flash_data n2100_flash_data = {
 151        .width          = 2,
 152};
 153
 154static struct resource n2100_flash_resource = {
 155        .start          = 0xf0000000,
 156        .end            = 0xf0ffffff,
 157        .flags          = IORESOURCE_MEM,
 158};
 159
 160static struct platform_device n2100_flash_device = {
 161        .name           = "physmap-flash",
 162        .id             = 0,
 163        .dev            = {
 164                .platform_data  = &n2100_flash_data,
 165        },
 166        .num_resources  = 1,
 167        .resource       = &n2100_flash_resource,
 168};
 169
 170
 171static struct plat_serial8250_port n2100_serial_port[] = {
 172        {
 173                .mapbase        = N2100_UART,
 174                .membase        = (char *)N2100_UART,
 175                .irq            = 0,
 176                .flags          = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
 177                .iotype         = UPIO_MEM,
 178                .regshift       = 0,
 179                .uartclk        = 1843200,
 180        },
 181        { },
 182};
 183
 184static struct resource n2100_uart_resource = {
 185        .start          = N2100_UART,
 186        .end            = N2100_UART + 7,
 187        .flags          = IORESOURCE_MEM,
 188};
 189
 190static struct platform_device n2100_serial_device = {
 191        .name           = "serial8250",
 192        .id             = PLAT8250_DEV_PLATFORM,
 193        .dev            = {
 194                .platform_data          = n2100_serial_port,
 195        },
 196        .num_resources  = 1,
 197        .resource       = &n2100_uart_resource,
 198};
 199
 200static struct f75375s_platform_data n2100_f75375s = {
 201        .pwm            = { 255, 255 },
 202        .pwm_enable = { 0, 0 },
 203};
 204
 205static struct pca9532_platform_data n2100_leds = {
 206        .leds = {
 207        {       .name = "n2100:red:satafail0",
 208                .state = PCA9532_OFF,
 209                .type = PCA9532_TYPE_LED,
 210        },
 211        {       .name = "n2100:red:satafail1",
 212                .state = PCA9532_OFF,
 213                .type = PCA9532_TYPE_LED,
 214        },
 215        {       .name = "n2100:blue:usb",
 216                .state = PCA9532_OFF,
 217                .type = PCA9532_TYPE_LED,
 218        },
 219        {       .type = PCA9532_TYPE_NONE },
 220
 221        {       .type = PCA9532_TYPE_NONE },
 222        {       .type = PCA9532_TYPE_NONE },
 223        {       .type = PCA9532_TYPE_NONE },
 224        {       .name = "n2100:red:usb",
 225                .state = PCA9532_OFF,
 226                .type = PCA9532_TYPE_LED,
 227        },
 228
 229        {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 230        {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
 231        {       .type = PCA9532_TYPE_NONE },
 232        {       .type = PCA9532_TYPE_NONE },
 233
 234        {       .type = PCA9532_TYPE_NONE },
 235        {       .name = "n2100:orange:system",
 236                .state = PCA9532_OFF,
 237                .type = PCA9532_TYPE_LED,
 238        },
 239        {       .name = "n2100:red:system",
 240                .state = PCA9532_OFF,
 241                .type = PCA9532_TYPE_LED,
 242        },
 243        {       .name = "N2100 beeper"  ,
 244                .state =  PCA9532_OFF,
 245                .type = PCA9532_TYPE_N2100_BEEP,
 246        },
 247        },
 248        .psc = { 0, 0 },
 249        .pwm = { 0, 0 },
 250};
 251
 252static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 253        {
 254                I2C_BOARD_INFO("rs5c372b", 0x32),
 255        },
 256        {
 257                I2C_BOARD_INFO("f75375", 0x2e),
 258                .platform_data = &n2100_f75375s,
 259        },
 260        {
 261                I2C_BOARD_INFO("pca9532", 0x60),
 262                .platform_data = &n2100_leds,
 263        },
 264};
 265
 266/*
 267 * Pull PCA9532 GPIO #8 low to power off the machine.
 268 */
 269static void n2100_power_off(void)
 270{
 271        local_irq_disable();
 272
 273        /* Start condition, I2C address of PCA9532, write transaction.  */
 274        *IOP3XX_IDBR0 = 0xc0;
 275        *IOP3XX_ICR0 = 0xe9;
 276        mdelay(1);
 277
 278        /* Write address 0x08.  */
 279        *IOP3XX_IDBR0 = 0x08;
 280        *IOP3XX_ICR0 = 0xe8;
 281        mdelay(1);
 282
 283        /* Write data 0x01, stop condition.  */
 284        *IOP3XX_IDBR0 = 0x01;
 285        *IOP3XX_ICR0 = 0xea;
 286
 287        while (1)
 288                ;
 289}
 290
 291static void n2100_restart(enum reboot_mode mode, const char *cmd)
 292{
 293        int ret;
 294
 295        ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
 296        if (ret) {
 297                pr_crit("could not drive reset GPIO low\n");
 298                return;
 299        }
 300        /* Wait for reset to happen */
 301        while (1)
 302                ;
 303}
 304
 305
 306static struct timer_list power_button_poll_timer;
 307
 308static void power_button_poll(struct timer_list *unused)
 309{
 310        if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
 311                ctrl_alt_del();
 312                return;
 313        }
 314
 315        power_button_poll_timer.expires = jiffies + (HZ / 10);
 316        add_timer(&power_button_poll_timer);
 317}
 318
 319static int __init n2100_request_gpios(void)
 320{
 321        int ret;
 322
 323        if (!machine_is_n2100())
 324                return 0;
 325
 326        ret = gpio_request(N2100_HARDWARE_RESET, "reset");
 327        if (ret)
 328                pr_err("could not request reset GPIO\n");
 329
 330        ret = gpio_request(N2100_POWER_BUTTON, "power");
 331        if (ret)
 332                pr_err("could not request power GPIO\n");
 333        else {
 334                ret = gpio_direction_input(N2100_POWER_BUTTON);
 335                if (ret)
 336                        pr_err("could not set power GPIO as input\n");
 337        }
 338        /* Set up power button poll timer */
 339        timer_setup(&power_button_poll_timer, power_button_poll, 0);
 340        power_button_poll_timer.expires = jiffies + (HZ / 10);
 341        add_timer(&power_button_poll_timer);
 342        return 0;
 343}
 344device_initcall(n2100_request_gpios);
 345
 346static void __init n2100_init_machine(void)
 347{
 348        register_iop32x_gpio();
 349        platform_device_register(&iop3xx_i2c0_device);
 350        platform_device_register(&n2100_flash_device);
 351        platform_device_register(&n2100_serial_device);
 352        platform_device_register(&iop3xx_dma_0_channel);
 353        platform_device_register(&iop3xx_dma_1_channel);
 354
 355        i2c_register_board_info(0, n2100_i2c_devices,
 356                ARRAY_SIZE(n2100_i2c_devices));
 357
 358        pm_power_off = n2100_power_off;
 359}
 360
 361MACHINE_START(N2100, "Thecus N2100")
 362        /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 363        .atag_offset    = 0x100,
 364        .map_io         = n2100_map_io,
 365        .init_irq       = iop32x_init_irq,
 366        .init_time      = n2100_timer_init,
 367        .init_machine   = n2100_init_machine,
 368        .restart        = n2100_restart,
 369MACHINE_END
 370