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 __init
  79 n2100_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
 114 static 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  */
 127 static 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 }
 134 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 135
 136 static int __init n2100_pci_init(void)
 137 {
 138         if (machine_is_n2100())
 139                 pci_common_init(&n2100_pci);
 140
 141         return 0;
 142 }
 143
 144 subsys_initcall(n2100_pci_init);
 145
 146
 147 /*
 148  * N2100 machine initialisation.
 149  */
 150 static struct physmap_flash_data n2100_flash_data = {
 151         .width          = 2,
 152 };
 153
 154 static struct resource n2100_flash_resource = {
 155         .start          = 0xf0000000,
 156         .end            = 0xf0ffffff,
 157         .flags          = IORESOURCE_MEM,
 158 };
 159
 160 static 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
 171 static 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
 184 static struct resource n2100_uart_resource = {
 185         .start          = N2100_UART,
 186         .end            = N2100_UART + 7,
 187         .flags          = IORESOURCE_MEM,
 188 };
 189
 190 static 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
 200 static struct f75375s_platform_data n2100_f75375s = {
 201         .pwm            = { 255, 255 },
 202         .pwm_enable = { 0, 0 },
 203 };
 204
 205 static 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
 252 static 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  */
 269 static 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
 291 static 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
 306 static struct timer_list power_button_poll_timer;
 307
 308 static 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
 319 static 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 }
 344 device_initcall(n2100_request_gpios);
 345
 346 static 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
 361 MACHINE_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,
 369 MACHINE_END