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/delay.h>
  21 #include <linux/kernel.h>
  22 #include <linux/pci.h>
  23 #include <linux/pm.h>
  24 #include <linux/string.h>
  25 #include <linux/slab.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 <asm/hardware.h>
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/mach/arch.h>
  36 #include <asm/mach/map.h>
  37 #include <asm/mach/pci.h>
  38 #include <asm/mach/time.h>
  39 #include <asm/mach-types.h>
  40 #include <asm/page.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/arch/time.h>
  43
  44 /*
  45  * N2100 timer tick configuration.
  46  */
  47 static void __init n2100_timer_init(void)
  48 {
  49         /* 33.000 MHz crystal.  */
  50         iop_init_time(198000000);
  51 }
  52
  53 static struct sys_timer n2100_timer = {
  54         .init           = n2100_timer_init,
  55         .offset         = iop_gettimeoffset,
  56 };
  57
  58
  59 /*
  60  * N2100 I/O.
  61  */
  62 static struct map_desc n2100_io_desc[] __initdata = {
  63         {       /* on-board devices */
  64                 .virtual        = N2100_UART,
  65                 .pfn            = __phys_to_pfn(N2100_UART),
  66                 .length         = 0x00100000,
  67                 .type           = MT_DEVICE
  68         },
  69 };
  70
  71 void __init n2100_map_io(void)
  72 {
  73         iop3xx_map_io();
  74         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  75 }
  76
  77
  78 /*
  79  * N2100 PCI.
  80  */
  81 static int __init
  82 n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  83 {
  84         int irq;
  85
  86         if (PCI_SLOT(dev->devfn) == 1) {
  87                 /* RTL8110SB #1 */
  88                 irq = IRQ_IOP32X_XINT0;
  89         } else if (PCI_SLOT(dev->devfn) == 2) {
  90                 /* RTL8110SB #2 */
  91                 irq = IRQ_IOP32X_XINT3;
  92         } else if (PCI_SLOT(dev->devfn) == 3) {
  93                 /* Sil3512 */
  94                 irq = IRQ_IOP32X_XINT2;
  95         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  96                 /* VT6212 INTA */
  97                 irq = IRQ_IOP32X_XINT1;
  98         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  99                 /* VT6212 INTB */
 100                 irq = IRQ_IOP32X_XINT0;
 101         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
 102                 /* VT6212 INTC */
 103                 irq = IRQ_IOP32X_XINT2;
 104         } else if (PCI_SLOT(dev->devfn) == 5) {
 105                 /* Mini-PCI slot */
 106                 irq = IRQ_IOP32X_XINT3;
 107         } else {
 108                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 109                         "device PCI:%d:%d:%d\n", dev->bus->number,
 110                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 111                 irq = -1;
 112         }
 113
 114         return irq;
 115 }
 116
 117 static struct hw_pci n2100_pci __initdata = {
 118         .swizzle        = pci_std_swizzle,
 119         .nr_controllers = 1,
 120         .setup          = iop3xx_pci_setup,
 121         .preinit        = iop3xx_pci_preinit,
 122         .scan           = iop3xx_pci_scan_bus,
 123         .map_irq        = n2100_pci_map_irq,
 124 };
 125
 126 /*
 127  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 128  * the ->broken_parity_status flag for both ports so that the r8169
 129  * driver knows it should ignore error interrupts.
 130  */
 131 static void n2100_fixup_r8169(struct pci_dev *dev)
 132 {
 133         if (dev->bus->number == 0 &&
 134             (dev->devfn == PCI_DEVFN(1, 0) ||
 135              dev->devfn == PCI_DEVFN(2, 0)))
 136                 dev->broken_parity_status = 1;
 137 }
 138 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 139
 140 static int __init n2100_pci_init(void)
 141 {
 142         if (machine_is_n2100())
 143                 pci_common_init(&n2100_pci);
 144
 145         return 0;
 146 }
 147
 148 subsys_initcall(n2100_pci_init);
 149
 150
 151 /*
 152  * N2100 machine initialisation.
 153  */
 154 static struct physmap_flash_data n2100_flash_data = {
 155         .width          = 2,
 156 };
 157
 158 static struct resource n2100_flash_resource = {
 159         .start          = 0xf0000000,
 160         .end            = 0xf0ffffff,
 161         .flags          = IORESOURCE_MEM,
 162 };
 163
 164 static struct platform_device n2100_flash_device = {
 165         .name           = "physmap-flash",
 166         .id             = 0,
 167         .dev            = {
 168                 .platform_data  = &n2100_flash_data,
 169         },
 170         .num_resources  = 1,
 171         .resource       = &n2100_flash_resource,
 172 };
 173
 174
 175 static struct plat_serial8250_port n2100_serial_port[] = {
 176         {
 177                 .mapbase        = N2100_UART,
 178                 .membase        = (char *)N2100_UART,
 179                 .irq            = 0,
 180                 .flags          = UPF_SKIP_TEST,
 181                 .iotype         = UPIO_MEM,
 182                 .regshift       = 0,
 183                 .uartclk        = 1843200,
 184         },
 185         { },
 186 };
 187
 188 static struct resource n2100_uart_resource = {
 189         .start          = N2100_UART,
 190         .end            = N2100_UART + 7,
 191         .flags          = IORESOURCE_MEM,
 192 };
 193
 194 static struct platform_device n2100_serial_device = {
 195         .name           = "serial8250",
 196         .id             = PLAT8250_DEV_PLATFORM,
 197         .dev            = {
 198                 .platform_data          = n2100_serial_port,
 199         },
 200         .num_resources  = 1,
 201         .resource       = &n2100_uart_resource,
 202 };
 203
 204 static struct f75375s_platform_data n2100_f75375s = {
 205         .pwm            = { 255, 255 },
 206         .pwm_enable = { 0, 0 },
 207 };
 208
 209 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 210         {
 211                 I2C_BOARD_INFO("rtc-rs5c372", 0x32),
 212                 .type = "rs5c372b",
 213         },
 214         {
 215                 I2C_BOARD_INFO("f75375", 0x2e),
 216                 .type = "f75375",
 217                 .platform_data = &n2100_f75375s,
 218         },
 219 };
 220
 221 /*
 222  * Pull PCA9532 GPIO #8 low to power off the machine.
 223  */
 224 static void n2100_power_off(void)
 225 {
 226         local_irq_disable();
 227
 228         /* Start condition, I2C address of PCA9532, write transaction.  */
 229         *IOP3XX_IDBR0 = 0xc0;
 230         *IOP3XX_ICR0 = 0xe9;
 231         mdelay(1);
 232
 233         /* Write address 0x08.  */
 234         *IOP3XX_IDBR0 = 0x08;
 235         *IOP3XX_ICR0 = 0xe8;
 236         mdelay(1);
 237
 238         /* Write data 0x01, stop condition.  */
 239         *IOP3XX_IDBR0 = 0x01;
 240         *IOP3XX_ICR0 = 0xea;
 241
 242         while (1)
 243                 ;
 244 }
 245
 246
 247 static struct timer_list power_button_poll_timer;
 248
 249 static void power_button_poll(unsigned long dummy)
 250 {
 251         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
 252                 ctrl_alt_del();
 253                 return;
 254         }
 255
 256         power_button_poll_timer.expires = jiffies + (HZ / 10);
 257         add_timer(&power_button_poll_timer);
 258 }
 259
 260
 261 static void __init n2100_init_machine(void)
 262 {
 263         platform_device_register(&iop3xx_i2c0_device);
 264         platform_device_register(&n2100_flash_device);
 265         platform_device_register(&n2100_serial_device);
 266         platform_device_register(&iop3xx_dma_0_channel);
 267         platform_device_register(&iop3xx_dma_1_channel);
 268
 269         i2c_register_board_info(0, n2100_i2c_devices,
 270                 ARRAY_SIZE(n2100_i2c_devices));
 271
 272         pm_power_off = n2100_power_off;
 273
 274         init_timer(&power_button_poll_timer);
 275         power_button_poll_timer.function = power_button_poll;
 276         power_button_poll_timer.expires = jiffies + (HZ / 10);
 277         add_timer(&power_button_poll_timer);
 278 }
 279
 280 MACHINE_START(N2100, "Thecus N2100")
 281         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 282         .phys_io        = N2100_UART,
 283         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
 284         .boot_params    = 0xa0000100,
 285         .map_io         = n2100_map_io,
 286         .init_irq       = iop32x_init_irq,
 287         .timer          = &n2100_timer,
 288         .init_machine   = n2100_init_machine,
 289 MACHINE_END