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
  41 /*
  42  * N2100 timer tick configuration.
  43  */
  44 static void __init n2100_timer_init(void)
  45 {
  46         /* 33.000 MHz crystal.  */
  47         iop3xx_init_time(198000000);
  48 }
  49
  50 static struct sys_timer n2100_timer = {
  51         .init           = n2100_timer_init,
  52         .offset         = iop3xx_gettimeoffset,
  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 inline int __init
  79 n2100_pci_map_irq(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         .swizzle        = pci_std_swizzle,
 116         .nr_controllers = 1,
 117         .setup          = iop3xx_pci_setup,
 118         .preinit        = iop3xx_pci_preinit,
 119         .scan           = iop3xx_pci_scan_bus,
 120         .map_irq        = n2100_pci_map_irq,
 121 };
 122
 123 static int __init n2100_pci_init(void)
 124 {
 125         if (machine_is_n2100())
 126                 pci_common_init(&n2100_pci);
 127
 128         return 0;
 129 }
 130
 131 subsys_initcall(n2100_pci_init);
 132
 133
 134 /*
 135  * N2100 machine initialisation.
 136  */
 137 static struct physmap_flash_data n2100_flash_data = {
 138         .width          = 2,
 139 };
 140
 141 static struct resource n2100_flash_resource = {
 142         .start          = 0xf0000000,
 143         .end            = 0xf0ffffff,
 144         .flags          = IORESOURCE_MEM,
 145 };
 146
 147 static struct platform_device n2100_flash_device = {
 148         .name           = "physmap-flash",
 149         .id             = 0,
 150         .dev            = {
 151                 .platform_data  = &n2100_flash_data,
 152         },
 153         .num_resources  = 1,
 154         .resource       = &n2100_flash_resource,
 155 };
 156
 157
 158 static struct plat_serial8250_port n2100_serial_port[] = {
 159         {
 160                 .mapbase        = N2100_UART,
 161                 .membase        = (char *)N2100_UART,
 162                 .irq            = 0,
 163                 .flags          = UPF_SKIP_TEST,
 164                 .iotype         = UPIO_MEM,
 165                 .regshift       = 0,
 166                 .uartclk        = 1843200,
 167         },
 168         { },
 169 };
 170
 171 static struct resource n2100_uart_resource = {
 172         .start          = N2100_UART,
 173         .end            = N2100_UART + 7,
 174         .flags          = IORESOURCE_MEM,
 175 };
 176
 177 static struct platform_device n2100_serial_device = {
 178         .name           = "serial8250",
 179         .id             = PLAT8250_DEV_PLATFORM,
 180         .dev            = {
 181                 .platform_data          = n2100_serial_port,
 182         },
 183         .num_resources  = 1,
 184         .resource       = &n2100_uart_resource,
 185 };
 186
 187
 188 /*
 189  * Pull PCA9532 GPIO #8 low to power off the machine.
 190  */
 191 static void n2100_power_off(void)
 192 {
 193         local_irq_disable();
 194
 195         /* Start condition, I2C address of PCA9532, write transaction.  */
 196         *IOP3XX_IDBR0 = 0xc0;
 197         *IOP3XX_ICR0 = 0xe9;
 198         mdelay(1);
 199
 200         /* Write address 0x08.  */
 201         *IOP3XX_IDBR0 = 0x08;
 202         *IOP3XX_ICR0 = 0xe8;
 203         mdelay(1);
 204
 205         /* Write data 0x01, stop condition.  */
 206         *IOP3XX_IDBR0 = 0x01;
 207         *IOP3XX_ICR0 = 0xea;
 208
 209         while (1)
 210                 ;
 211 }
 212
 213
 214 static struct timer_list power_button_poll_timer;
 215
 216 static void power_button_poll(unsigned long dummy)
 217 {
 218         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
 219                 ctrl_alt_del();
 220                 return;
 221         }
 222
 223         power_button_poll_timer.expires = jiffies + (HZ / 10);
 224         add_timer(&power_button_poll_timer);
 225 }
 226
 227
 228 static void __init n2100_init_machine(void)
 229 {
 230         platform_device_register(&iop3xx_i2c0_device);
 231         platform_device_register(&n2100_flash_device);
 232         platform_device_register(&n2100_serial_device);
 233
 234         pm_power_off = n2100_power_off;
 235
 236         init_timer(&power_button_poll_timer);
 237         power_button_poll_timer.function = power_button_poll;
 238         power_button_poll_timer.expires = jiffies + (HZ / 10);
 239         add_timer(&power_button_poll_timer);
 240 }
 241
 242 MACHINE_START(N2100, "Thecus N2100")
 243         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 244         .phys_io        = N2100_UART,
 245         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
 246         .boot_params    = 0xa0000100,
 247         .map_io         = n2100_map_io,
 248         .init_irq       = iop32x_init_irq,
 249         .timer          = &n2100_timer,
 250         .init_machine   = n2100_init_machine,
 251 MACHINE_END