arch/arm/mach-iop32x/n2100.c

   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  */
  49 static 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  */
  59 static 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
  68 void __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  */
  78 static int n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  79 {
  80         int irq;
  81
  82         if (PCI_SLOT(dev->devfn) == 1) {
  83                 /* RTL8110SB #1 */
  84                 irq = IRQ_IOP32X_XINT0;
  85         } else if (PCI_SLOT(dev->devfn) == 2) {
  86                 /* RTL8110SB #2 */
  87                 irq = IRQ_IOP32X_XINT3;
  88         } else if (PCI_SLOT(dev->devfn) == 3) {
  89                 /* Sil3512 */
  90                 irq = IRQ_IOP32X_XINT2;
  91         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  92                 /* VT6212 INTA */
  93                 irq = IRQ_IOP32X_XINT1;
  94         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  95                 /* VT6212 INTB */
  96                 irq = IRQ_IOP32X_XINT0;
  97         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
  98                 /* VT6212 INTC */
  99                 irq = IRQ_IOP32X_XINT2;
 100         } else if (PCI_SLOT(dev->devfn) == 5) {
 101                 /* Mini-PCI slot */
 102                 irq = IRQ_IOP32X_XINT3;
 103         } else {
 104                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 105                         "device PCI:%d:%d:%d\n", dev->bus->number,
 106                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 107                 irq = -1;
 108         }
 109
 110         return irq;
 111 }
 112
 113 static struct hw_pci n2100_pci __initdata = {
 114         .nr_controllers = 1,
 115         .ops            = &iop3xx_ops,
 116         .setup          = iop3xx_pci_setup,
 117         .preinit        = iop3xx_pci_preinit,
 118         .map_irq        = n2100_pci_map_irq,
 119 };
 120
 121 /*
 122  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 123  * the ->broken_parity_status flag for both ports so that the r8169
 124  * driver knows it should ignore error interrupts.
 125  */
 126 static void n2100_fixup_r8169(struct pci_dev *dev)
 127 {
 128         if (dev->bus->number == 0 &&
 129             (dev->devfn == PCI_DEVFN(1, 0) ||
 130              dev->devfn == PCI_DEVFN(2, 0)))
 131                 dev->broken_parity_status = 1;
 132 }
 133 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 134
 135 static int __init n2100_pci_init(void)
 136 {
 137         if (machine_is_n2100())
 138                 pci_common_init(&n2100_pci);
 139
 140         return 0;
 141 }
 142
 143 subsys_initcall(n2100_pci_init);
 144
 145
 146 /*
 147  * N2100 machine initialisation.
 148  */
 149 static struct physmap_flash_data n2100_flash_data = {
 150         .width          = 2,
 151 };
 152
 153 static struct resource n2100_flash_resource = {
 154         .start          = 0xf0000000,
 155         .end            = 0xf0ffffff,
 156         .flags          = IORESOURCE_MEM,
 157 };
 158
 159 static struct platform_device n2100_flash_device = {
 160         .name           = "physmap-flash",
 161         .id             = 0,
 162         .dev            = {
 163                 .platform_data  = &n2100_flash_data,
 164         },
 165         .num_resources  = 1,
 166         .resource       = &n2100_flash_resource,
 167 };
 168
 169
 170 static struct plat_serial8250_port n2100_serial_port[] = {
 171         {
 172                 .mapbase        = N2100_UART,
 173                 .membase        = (char *)N2100_UART,
 174                 .irq            = 0,
 175                 .flags          = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
 176                 .iotype         = UPIO_MEM,
 177                 .regshift       = 0,
 178                 .uartclk        = 1843200,
 179         },
 180         { },
 181 };
 182
 183 static struct resource n2100_uart_resource = {
 184         .start          = N2100_UART,
 185         .end            = N2100_UART + 7,
 186         .flags          = IORESOURCE_MEM,
 187 };
 188
 189 static struct platform_device n2100_serial_device = {
 190         .name           = "serial8250",
 191         .id             = PLAT8250_DEV_PLATFORM,
 192         .dev            = {
 193                 .platform_data          = n2100_serial_port,
 194         },
 195         .num_resources  = 1,
 196         .resource       = &n2100_uart_resource,
 197 };
 198
 199 static struct f75375s_platform_data n2100_f75375s = {
 200         .pwm            = { 255, 255 },
 201         .pwm_enable = { 0, 0 },
 202 };
 203
 204 static struct pca9532_platform_data n2100_leds = {
 205         .leds = {
 206         {       .name = "n2100:red:satafail0",
 207                 .state = PCA9532_OFF,
 208                 .type = PCA9532_TYPE_LED,
 209         },
 210         {       .name = "n2100:red:satafail1",
 211                 .state = PCA9532_OFF,
 212                 .type = PCA9532_TYPE_LED,
 213         },
 214         {       .name = "n2100:blue:usb",
 215                 .state = PCA9532_OFF,
 216                 .type = PCA9532_TYPE_LED,
 217         },
 218         {       .type = PCA9532_TYPE_NONE },
 219
 220         {       .type = PCA9532_TYPE_NONE },
 221         {       .type = PCA9532_TYPE_NONE },
 222         {       .type = PCA9532_TYPE_NONE },
 223         {       .name = "n2100:red:usb",
 224                 .state = PCA9532_OFF,
 225                 .type = PCA9532_TYPE_LED,
 226         },
 227
 228         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 229         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
 230         {       .type = PCA9532_TYPE_NONE },
 231         {       .type = PCA9532_TYPE_NONE },
 232
 233         {       .type = PCA9532_TYPE_NONE },
 234         {       .name = "n2100:orange:system",
 235                 .state = PCA9532_OFF,
 236                 .type = PCA9532_TYPE_LED,
 237         },
 238         {       .name = "n2100:red:system",
 239                 .state = PCA9532_OFF,
 240                 .type = PCA9532_TYPE_LED,
 241         },
 242         {       .name = "N2100 beeper"  ,
 243                 .state =  PCA9532_OFF,
 244                 .type = PCA9532_TYPE_N2100_BEEP,
 245         },
 246         },
 247         .psc = { 0, 0 },
 248         .pwm = { 0, 0 },
 249 };
 250
 251 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 252         {
 253                 I2C_BOARD_INFO("rs5c372b", 0x32),
 254         },
 255         {
 256                 I2C_BOARD_INFO("f75375", 0x2e),
 257                 .platform_data = &n2100_f75375s,
 258         },
 259         {
 260                 I2C_BOARD_INFO("pca9532", 0x60),
 261                 .platform_data = &n2100_leds,
 262         },
 263 };
 264
 265 /*
 266  * Pull PCA9532 GPIO #8 low to power off the machine.
 267  */
 268 static void n2100_power_off(void)
 269 {
 270         local_irq_disable();
 271
 272         /* Start condition, I2C address of PCA9532, write transaction.  */
 273         *IOP3XX_IDBR0 = 0xc0;
 274         *IOP3XX_ICR0 = 0xe9;
 275         mdelay(1);
 276
 277         /* Write address 0x08.  */
 278         *IOP3XX_IDBR0 = 0x08;
 279         *IOP3XX_ICR0 = 0xe8;
 280         mdelay(1);
 281
 282         /* Write data 0x01, stop condition.  */
 283         *IOP3XX_IDBR0 = 0x01;
 284         *IOP3XX_ICR0 = 0xea;
 285
 286         while (1)
 287                 ;
 288 }
 289
 290 static void n2100_restart(enum reboot_mode mode, const char *cmd)
 291 {
 292         int ret;
 293
 294         ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
 295         if (ret) {
 296                 pr_crit("could not drive reset GPIO low\n");
 297                 return;
 298         }
 299         /* Wait for reset to happen */
 300         while (1)
 301                 ;
 302 }
 303
 304
 305 static struct timer_list power_button_poll_timer;
 306
 307 static void power_button_poll(struct timer_list *unused)
 308 {
 309         if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
 310                 ctrl_alt_del();
 311                 return;
 312         }
 313
 314         power_button_poll_timer.expires = jiffies + (HZ / 10);
 315         add_timer(&power_button_poll_timer);
 316 }
 317
 318 static int __init n2100_request_gpios(void)
 319 {
 320         int ret;
 321
 322         if (!machine_is_n2100())
 323                 return 0;
 324
 325         ret = gpio_request(N2100_HARDWARE_RESET, "reset");
 326         if (ret)
 327                 pr_err("could not request reset GPIO\n");
 328
 329         ret = gpio_request(N2100_POWER_BUTTON, "power");
 330         if (ret)
 331                 pr_err("could not request power GPIO\n");
 332         else {
 333                 ret = gpio_direction_input(N2100_POWER_BUTTON);
 334                 if (ret)
 335                         pr_err("could not set power GPIO as input\n");
 336         }
 337         /* Set up power button poll timer */
 338         timer_setup(&power_button_poll_timer, power_button_poll, 0);
 339         power_button_poll_timer.expires = jiffies + (HZ / 10);
 340         add_timer(&power_button_poll_timer);
 341         return 0;
 342 }
 343 device_initcall(n2100_request_gpios);
 344
 345 static void __init n2100_init_machine(void)
 346 {
 347         register_iop32x_gpio();
 348         platform_device_register(&iop3xx_i2c0_device);
 349         platform_device_register(&n2100_flash_device);
 350         platform_device_register(&n2100_serial_device);
 351         platform_device_register(&iop3xx_dma_0_channel);
 352         platform_device_register(&iop3xx_dma_1_channel);
 353
 354         i2c_register_board_info(0, n2100_i2c_devices,
 355                 ARRAY_SIZE(n2100_i2c_devices));
 356
 357         pm_power_off = n2100_power_off;
 358 }
 359
 360 MACHINE_START(N2100, "Thecus N2100")
 361         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 362         .atag_offset    = 0x100,
 363         .map_io         = n2100_map_io,
 364         .init_irq       = iop32x_init_irq,
 365         .init_time      = n2100_timer_init,
 366         .init_machine   = n2100_init_machine,
 367         .restart        = n2100_restart,
 368 MACHINE_END