release/src-rt-6.x/linux/linux-2.6/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/delay.h>
  20 #include <linux/kernel.h>
  21 #include <linux/pci.h>
  22 #include <linux/pm.h>
  23 #include <linux/string.h>
  24 #include <linux/slab.h>
  25 #include <linux/serial_core.h>
  26 #include <linux/serial_8250.h>
  27 #include <linux/mtd/physmap.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/reboot.h>
  30 #include <asm/hardware.h>
  31 #include <asm/io.h>
  32 #include <asm/irq.h>
  33 #include <asm/mach/arch.h>
  34 #include <asm/mach/map.h>
  35 #include <asm/mach/pci.h>
  36 #include <asm/mach/time.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/page.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/arch/time.h>
  41
  42 /*
  43  * N2100 timer tick configuration.
  44  */
  45 static void __init n2100_timer_init(void)
  46 {
  47         /* 33.000 MHz crystal.  */
  48         iop_init_time(198000000);
  49 }
  50
  51 static struct sys_timer n2100_timer = {
  52         .init           = n2100_timer_init,
  53         .offset         = iop_gettimeoffset,
  54 };
  55
  56
  57 /*
  58  * N2100 I/O.
  59  */
  60 static struct map_desc n2100_io_desc[] __initdata = {
  61         {       /* on-board devices */
  62                 .virtual        = N2100_UART,
  63                 .pfn            = __phys_to_pfn(N2100_UART),
  64                 .length         = 0x00100000,
  65                 .type           = MT_DEVICE
  66         },
  67 };
  68
  69 void __init n2100_map_io(void)
  70 {
  71         iop3xx_map_io();
  72         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  73 }
  74
  75
  76 /*
  77  * N2100 PCI.
  78  */
  79 static int __init
  80 n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  81 {
  82         int irq;
  83
  84         if (PCI_SLOT(dev->devfn) == 1) {
  85                 /* RTL8110SB #1 */
  86                 irq = IRQ_IOP32X_XINT0;
  87         } else if (PCI_SLOT(dev->devfn) == 2) {
  88                 /* RTL8110SB #2 */
  89                 irq = IRQ_IOP32X_XINT3;
  90         } else if (PCI_SLOT(dev->devfn) == 3) {
  91                 /* Sil3512 */
  92                 irq = IRQ_IOP32X_XINT2;
  93         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  94                 /* VT6212 INTA */
  95                 irq = IRQ_IOP32X_XINT1;
  96         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  97                 /* VT6212 INTB */
  98                 irq = IRQ_IOP32X_XINT0;
  99         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
 100                 /* VT6212 INTC */
 101                 irq = IRQ_IOP32X_XINT2;
 102         } else if (PCI_SLOT(dev->devfn) == 5) {
 103                 /* Mini-PCI slot */
 104                 irq = IRQ_IOP32X_XINT3;
 105         } else {
 106                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 107                         "device PCI:%d:%d:%d\n", dev->bus->number,
 108                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 109                 irq = -1;
 110         }
 111
 112         return irq;
 113 }
 114
 115 static struct hw_pci n2100_pci __initdata = {
 116         .swizzle        = pci_std_swizzle,
 117         .nr_controllers = 1,
 118         .setup          = iop3xx_pci_setup,
 119         .preinit        = iop3xx_pci_preinit,
 120         .scan           = iop3xx_pci_scan_bus,
 121         .map_irq        = n2100_pci_map_irq,
 122 };
 123
 124 /*
 125  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 126  * the ->broken_parity_status flag for both ports so that the r8169
 127  * driver knows it should ignore error interrupts.
 128  */
 129 static void n2100_fixup_r8169(struct pci_dev *dev)
 130 {
 131         if (dev->bus->number == 0 &&
 132             (dev->devfn == PCI_DEVFN(1, 0) ||
 133              dev->devfn == PCI_DEVFN(2, 0)))
 134                 dev->broken_parity_status = 1;
 135 }
 136 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 137
 138 static int __init n2100_pci_init(void)
 139 {
 140         if (machine_is_n2100())
 141                 pci_common_init(&n2100_pci);
 142
 143         return 0;
 144 }
 145
 146 subsys_initcall(n2100_pci_init);
 147
 148
 149 /*
 150  * N2100 machine initialisation.
 151  */
 152 static struct physmap_flash_data n2100_flash_data = {
 153         .width          = 2,
 154 };
 155
 156 static struct resource n2100_flash_resource = {
 157         .start          = 0xf0000000,
 158         .end            = 0xf0ffffff,
 159         .flags          = IORESOURCE_MEM,
 160 };
 161
 162 static struct platform_device n2100_flash_device = {
 163         .name           = "physmap-flash",
 164         .id             = 0,
 165         .dev            = {
 166                 .platform_data  = &n2100_flash_data,
 167         },
 168         .num_resources  = 1,
 169         .resource       = &n2100_flash_resource,
 170 };
 171
 172
 173 static struct plat_serial8250_port n2100_serial_port[] = {
 174         {
 175                 .mapbase        = N2100_UART,
 176                 .membase        = (char *)N2100_UART,
 177                 .irq            = 0,
 178                 .flags          = UPF_SKIP_TEST,
 179                 .iotype         = UPIO_MEM,
 180                 .regshift       = 0,
 181                 .uartclk        = 1843200,
 182         },
 183         { },
 184 };
 185
 186 static struct resource n2100_uart_resource = {
 187         .start          = N2100_UART,
 188         .end            = N2100_UART + 7,
 189         .flags          = IORESOURCE_MEM,
 190 };
 191
 192 static struct platform_device n2100_serial_device = {
 193         .name           = "serial8250",
 194         .id             = PLAT8250_DEV_PLATFORM,
 195         .dev            = {
 196                 .platform_data          = n2100_serial_port,
 197         },
 198         .num_resources  = 1,
 199         .resource       = &n2100_uart_resource,
 200 };
 201
 202
 203 /*
 204  * Pull PCA9532 GPIO #8 low to power off the machine.
 205  */
 206 static void n2100_power_off(void)
 207 {
 208         local_irq_disable();
 209
 210         /* Start condition, I2C address of PCA9532, write transaction.  */
 211         *IOP3XX_IDBR0 = 0xc0;
 212         *IOP3XX_ICR0 = 0xe9;
 213         mdelay(1);
 214
 215         /* Write address 0x08.  */
 216         *IOP3XX_IDBR0 = 0x08;
 217         *IOP3XX_ICR0 = 0xe8;
 218         mdelay(1);
 219
 220         /* Write data 0x01, stop condition.  */
 221         *IOP3XX_IDBR0 = 0x01;
 222         *IOP3XX_ICR0 = 0xea;
 223
 224         while (1)
 225                 ;
 226 }
 227
 228
 229 static struct timer_list power_button_poll_timer;
 230
 231 static void power_button_poll(unsigned long dummy)
 232 {
 233         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
 234                 ctrl_alt_del();
 235                 return;
 236         }
 237
 238         power_button_poll_timer.expires = jiffies + (HZ / 10);
 239         add_timer(&power_button_poll_timer);
 240 }
 241
 242
 243 static void __init n2100_init_machine(void)
 244 {
 245         platform_device_register(&iop3xx_i2c0_device);
 246         platform_device_register(&n2100_flash_device);
 247         platform_device_register(&n2100_serial_device);
 248
 249         pm_power_off = n2100_power_off;
 250
 251         init_timer(&power_button_poll_timer);
 252         power_button_poll_timer.function = power_button_poll;
 253         power_button_poll_timer.expires = jiffies + (HZ / 10);
 254         add_timer(&power_button_poll_timer);
 255 }
 256
 257 MACHINE_START(N2100, "Thecus N2100")
 258         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 259         .phys_io        = N2100_UART,
 260         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
 261         .boot_params    = 0xa0000100,
 262         .map_io         = n2100_map_io,
 263         .init_irq       = iop32x_init_irq,
 264         .timer          = &n2100_timer,
 265         .init_machine   = n2100_init_machine,
 266 MACHINE_END