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/slab.h>
  27 #include <linux/serial_core.h>
  28 #include <linux/serial_8250.h>
  29 #include <linux/mtd/physmap.h>
  30 #include <linux/i2c.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/reboot.h>
  33 #include <asm/hardware.h>
  34 #include <asm/io.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 <asm/arch/time.h>
  44
  45 /*
  46  * N2100 timer tick configuration.
  47  */
  48 static void __init n2100_timer_init(void)
  49 {
  50         /* 33.000 MHz crystal.  */
  51         iop_init_time(198000000);
  52 }
  53
  54 static struct sys_timer n2100_timer = {
  55         .init           = n2100_timer_init,
  56         .offset         = iop_gettimeoffset,
  57 };
  58
  59
  60 /*
  61  * N2100 I/O.
  62  */
  63 static struct map_desc n2100_io_desc[] __initdata = {
  64         {       /* on-board devices */
  65                 .virtual        = N2100_UART,
  66                 .pfn            = __phys_to_pfn(N2100_UART),
  67                 .length         = 0x00100000,
  68                 .type           = MT_DEVICE
  69         },
  70 };
  71
  72 void __init n2100_map_io(void)
  73 {
  74         iop3xx_map_io();
  75         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  76 }
  77
  78
  79 /*
  80  * N2100 PCI.
  81  */
  82 static int __init
  83 n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  84 {
  85         int irq;
  86
  87         if (PCI_SLOT(dev->devfn) == 1) {
  88                 /* RTL8110SB #1 */
  89                 irq = IRQ_IOP32X_XINT0;
  90         } else if (PCI_SLOT(dev->devfn) == 2) {
  91                 /* RTL8110SB #2 */
  92                 irq = IRQ_IOP32X_XINT3;
  93         } else if (PCI_SLOT(dev->devfn) == 3) {
  94                 /* Sil3512 */
  95                 irq = IRQ_IOP32X_XINT2;
  96         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  97                 /* VT6212 INTA */
  98                 irq = IRQ_IOP32X_XINT1;
  99         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
 100                 /* VT6212 INTB */
 101                 irq = IRQ_IOP32X_XINT0;
 102         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
 103                 /* VT6212 INTC */
 104                 irq = IRQ_IOP32X_XINT2;
 105         } else if (PCI_SLOT(dev->devfn) == 5) {
 106                 /* Mini-PCI slot */
 107                 irq = IRQ_IOP32X_XINT3;
 108         } else {
 109                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 110                         "device PCI:%d:%d:%d\n", dev->bus->number,
 111                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 112                 irq = -1;
 113         }
 114
 115         return irq;
 116 }
 117
 118 static struct hw_pci n2100_pci __initdata = {
 119         .swizzle        = pci_std_swizzle,
 120         .nr_controllers = 1,
 121         .setup          = iop3xx_pci_setup,
 122         .preinit        = iop3xx_pci_preinit,
 123         .scan           = iop3xx_pci_scan_bus,
 124         .map_irq        = n2100_pci_map_irq,
 125 };
 126
 127 /*
 128  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 129  * the ->broken_parity_status flag for both ports so that the r8169
 130  * driver knows it should ignore error interrupts.
 131  */
 132 static void n2100_fixup_r8169(struct pci_dev *dev)
 133 {
 134         if (dev->bus->number == 0 &&
 135             (dev->devfn == PCI_DEVFN(1, 0) ||
 136              dev->devfn == PCI_DEVFN(2, 0)))
 137                 dev->broken_parity_status = 1;
 138 }
 139 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 140
 141 static int __init n2100_pci_init(void)
 142 {
 143         if (machine_is_n2100())
 144                 pci_common_init(&n2100_pci);
 145
 146         return 0;
 147 }
 148
 149 subsys_initcall(n2100_pci_init);
 150
 151
 152 /*
 153  * N2100 machine initialisation.
 154  */
 155 static struct physmap_flash_data n2100_flash_data = {
 156         .width          = 2,
 157 };
 158
 159 static struct resource n2100_flash_resource = {
 160         .start          = 0xf0000000,
 161         .end            = 0xf0ffffff,
 162         .flags          = IORESOURCE_MEM,
 163 };
 164
 165 static struct platform_device n2100_flash_device = {
 166         .name           = "physmap-flash",
 167         .id             = 0,
 168         .dev            = {
 169                 .platform_data  = &n2100_flash_data,
 170         },
 171         .num_resources  = 1,
 172         .resource       = &n2100_flash_resource,
 173 };
 174
 175
 176 static struct plat_serial8250_port n2100_serial_port[] = {
 177         {
 178                 .mapbase        = N2100_UART,
 179                 .membase        = (char *)N2100_UART,
 180                 .irq            = 0,
 181                 .flags          = UPF_SKIP_TEST,
 182                 .iotype         = UPIO_MEM,
 183                 .regshift       = 0,
 184                 .uartclk        = 1843200,
 185         },
 186         { },
 187 };
 188
 189 static struct resource n2100_uart_resource = {
 190         .start          = N2100_UART,
 191         .end            = N2100_UART + 7,
 192         .flags          = IORESOURCE_MEM,
 193 };
 194
 195 static struct platform_device n2100_serial_device = {
 196         .name           = "serial8250",
 197         .id             = PLAT8250_DEV_PLATFORM,
 198         .dev            = {
 199                 .platform_data          = n2100_serial_port,
 200         },
 201         .num_resources  = 1,
 202         .resource       = &n2100_uart_resource,
 203 };
 204
 205 static struct f75375s_platform_data n2100_f75375s = {
 206         .pwm            = { 255, 255 },
 207         .pwm_enable = { 0, 0 },
 208 };
 209
 210 static struct pca9532_platform_data n2100_leds = {
 211         .leds = {
 212         {       .name = "n2100:red:satafail0",
 213                 .state = PCA9532_OFF,
 214                 .type = PCA9532_TYPE_LED,
 215         },
 216         {       .name = "n2100:red:satafail1",
 217                 .state = PCA9532_OFF,
 218                 .type = PCA9532_TYPE_LED,
 219         },
 220         {       .name = "n2100:blue:usb",
 221                 .state = PCA9532_OFF,
 222                 .type = PCA9532_TYPE_LED,
 223         },
 224         {       .type = PCA9532_TYPE_NONE },
 225
 226         {       .type = PCA9532_TYPE_NONE },
 227         {       .type = PCA9532_TYPE_NONE },
 228         {       .type = PCA9532_TYPE_NONE },
 229         {       .name = "n2100:red:usb",
 230                 .state = PCA9532_OFF,
 231                 .type = PCA9532_TYPE_LED,
 232         },
 233
 234         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 235         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
 236         {       .type = PCA9532_TYPE_NONE },
 237         {       .type = PCA9532_TYPE_NONE },
 238
 239         {       .type = PCA9532_TYPE_NONE },
 240         {       .name = "n2100:orange:system",
 241                 .state = PCA9532_OFF,
 242                 .type = PCA9532_TYPE_LED,
 243         },
 244         {       .name = "n2100:red:system",
 245                 .state = PCA9532_OFF,
 246                 .type = PCA9532_TYPE_LED,
 247         },
 248         {       .name = "N2100 beeper"  ,
 249                 .state =  PCA9532_OFF,
 250                 .type = PCA9532_TYPE_N2100_BEEP,
 251         },
 252         },
 253         .psc = { 0, 0 },
 254         .pwm = { 0, 0 },
 255 };
 256
 257 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 258         {
 259                 I2C_BOARD_INFO("rs5c372b", 0x32),
 260         },
 261         {
 262                 I2C_BOARD_INFO("f75375", 0x2e),
 263                 .platform_data = &n2100_f75375s,
 264         },
 265         {
 266                 I2C_BOARD_INFO("pca9532", 0x60),
 267                 .platform_data = &n2100_leds,
 268         },
 269 };
 270
 271 /*
 272  * Pull PCA9532 GPIO #8 low to power off the machine.
 273  */
 274 static void n2100_power_off(void)
 275 {
 276         local_irq_disable();
 277
 278         /* Start condition, I2C address of PCA9532, write transaction.  */
 279         *IOP3XX_IDBR0 = 0xc0;
 280         *IOP3XX_ICR0 = 0xe9;
 281         mdelay(1);
 282
 283         /* Write address 0x08.  */
 284         *IOP3XX_IDBR0 = 0x08;
 285         *IOP3XX_ICR0 = 0xe8;
 286         mdelay(1);
 287
 288         /* Write data 0x01, stop condition.  */
 289         *IOP3XX_IDBR0 = 0x01;
 290         *IOP3XX_ICR0 = 0xea;
 291
 292         while (1)
 293                 ;
 294 }
 295
 296
 297 static struct timer_list power_button_poll_timer;
 298
 299 static void power_button_poll(unsigned long dummy)
 300 {
 301         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
 302                 ctrl_alt_del();
 303                 return;
 304         }
 305
 306         power_button_poll_timer.expires = jiffies + (HZ / 10);
 307         add_timer(&power_button_poll_timer);
 308 }
 309
 310
 311 static void __init n2100_init_machine(void)
 312 {
 313         platform_device_register(&iop3xx_i2c0_device);
 314         platform_device_register(&n2100_flash_device);
 315         platform_device_register(&n2100_serial_device);
 316         platform_device_register(&iop3xx_dma_0_channel);
 317         platform_device_register(&iop3xx_dma_1_channel);
 318
 319         i2c_register_board_info(0, n2100_i2c_devices,
 320                 ARRAY_SIZE(n2100_i2c_devices));
 321
 322         pm_power_off = n2100_power_off;
 323
 324         init_timer(&power_button_poll_timer);
 325         power_button_poll_timer.function = power_button_poll;
 326         power_button_poll_timer.expires = jiffies + (HZ / 10);
 327         add_timer(&power_button_poll_timer);
 328 }
 329
 330 MACHINE_START(N2100, "Thecus N2100")
 331         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 332         .phys_io        = N2100_UART,
 333         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
 334         .boot_params    = 0xa0000100,
 335         .map_io         = n2100_map_io,
 336         .init_irq       = iop32x_init_irq,
 337         .timer          = &n2100_timer,
 338         .init_machine   = n2100_init_machine,
 339 MACHINE_END