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   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/i2c.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/reboot.h>
  31 #include <asm/hardware.h>
  32 #include <asm/io.h>
  33 #include <asm/irq.h>
  34 #include <asm/mach/arch.h>
  35 #include <asm/mach/map.h>
  36 #include <asm/mach/pci.h>
  37 #include <asm/mach/time.h>
  38 #include <asm/mach-types.h>
  39 #include <asm/page.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/arch/time.h>
  42
  43 /*
  44  * N2100 timer tick configuration.
  45  */
  46 static void __init n2100_timer_init(void)
  47 {
  48         /* 33.000 MHz crystal.  */
  49         iop_init_time(198000000);
  50 }
  51
  52 static struct sys_timer n2100_timer = {
  53         .init           = n2100_timer_init,
  54         .offset         = iop_gettimeoffset,
  55 };
  56
  57
  58 /*
  59  * N2100 I/O.
  60  */
  61 static struct map_desc n2100_io_desc[] __initdata = {
  62         {       /* on-board devices */
  63                 .virtual        = N2100_UART,
  64                 .pfn            = __phys_to_pfn(N2100_UART),
  65                 .length         = 0x00100000,
  66                 .type           = MT_DEVICE
  67         },
  68 };
  69
  70 void __init n2100_map_io(void)
  71 {
  72         iop3xx_map_io();
  73         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  74 }
  75
  76
  77 /*
  78  * N2100 PCI.
  79  */
  80 static int __init
  81 n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  82 {
  83         int irq;
  84
  85         if (PCI_SLOT(dev->devfn) == 1) {
  86                 /* RTL8110SB #1 */
  87                 irq = IRQ_IOP32X_XINT0;
  88         } else if (PCI_SLOT(dev->devfn) == 2) {
  89                 /* RTL8110SB #2 */
  90                 irq = IRQ_IOP32X_XINT3;
  91         } else if (PCI_SLOT(dev->devfn) == 3) {
  92                 /* Sil3512 */
  93                 irq = IRQ_IOP32X_XINT2;
  94         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  95                 /* VT6212 INTA */
  96                 irq = IRQ_IOP32X_XINT1;
  97         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  98                 /* VT6212 INTB */
  99                 irq = IRQ_IOP32X_XINT0;
 100         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
 101                 /* VT6212 INTC */
 102                 irq = IRQ_IOP32X_XINT2;
 103         } else if (PCI_SLOT(dev->devfn) == 5) {
 104                 /* Mini-PCI slot */
 105                 irq = IRQ_IOP32X_XINT3;
 106         } else {
 107                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 108                         "device PCI:%d:%d:%d\n", dev->bus->number,
 109                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 110                 irq = -1;
 111         }
 112
 113         return irq;
 114 }
 115
 116 static struct hw_pci n2100_pci __initdata = {
 117         .swizzle        = pci_std_swizzle,
 118         .nr_controllers = 1,
 119         .setup          = iop3xx_pci_setup,
 120         .preinit        = iop3xx_pci_preinit,
 121         .scan           = iop3xx_pci_scan_bus,
 122         .map_irq        = n2100_pci_map_irq,
 123 };
 124
 125 /*
 126  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 127  * the ->broken_parity_status flag for both ports so that the r8169
 128  * driver knows it should ignore error interrupts.
 129  */
 130 static void n2100_fixup_r8169(struct pci_dev *dev)
 131 {
 132         if (dev->bus->number == 0 &&
 133             (dev->devfn == PCI_DEVFN(1, 0) ||
 134              dev->devfn == PCI_DEVFN(2, 0)))
 135                 dev->broken_parity_status = 1;
 136 }
 137 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 138
 139 static int __init n2100_pci_init(void)
 140 {
 141         if (machine_is_n2100())
 142                 pci_common_init(&n2100_pci);
 143
 144         return 0;
 145 }
 146
 147 subsys_initcall(n2100_pci_init);
 148
 149
 150 /*
 151  * N2100 machine initialisation.
 152  */
 153 static struct physmap_flash_data n2100_flash_data = {
 154         .width          = 2,
 155 };
 156
 157 static struct resource n2100_flash_resource = {
 158         .start          = 0xf0000000,
 159         .end            = 0xf0ffffff,
 160         .flags          = IORESOURCE_MEM,
 161 };
 162
 163 static struct platform_device n2100_flash_device = {
 164         .name           = "physmap-flash",
 165         .id             = 0,
 166         .dev            = {
 167                 .platform_data  = &n2100_flash_data,
 168         },
 169         .num_resources  = 1,
 170         .resource       = &n2100_flash_resource,
 171 };
 172
 173
 174 static struct plat_serial8250_port n2100_serial_port[] = {
 175         {
 176                 .mapbase        = N2100_UART,
 177                 .membase        = (char *)N2100_UART,
 178                 .irq            = 0,
 179                 .flags          = UPF_SKIP_TEST,
 180                 .iotype         = UPIO_MEM,
 181                 .regshift       = 0,
 182                 .uartclk        = 1843200,
 183         },
 184         { },
 185 };
 186
 187 static struct resource n2100_uart_resource = {
 188         .start          = N2100_UART,
 189         .end            = N2100_UART + 7,
 190         .flags          = IORESOURCE_MEM,
 191 };
 192
 193 static struct platform_device n2100_serial_device = {
 194         .name           = "serial8250",
 195         .id             = PLAT8250_DEV_PLATFORM,
 196         .dev            = {
 197                 .platform_data          = n2100_serial_port,
 198         },
 199         .num_resources  = 1,
 200         .resource       = &n2100_uart_resource,
 201 };
 202
 203 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 204         {
 205                 I2C_BOARD_INFO("rtc-rs5c372", 0x32),
 206                 .type = "rs5c372b",
 207         },
 208 };
 209
 210 /*
 211  * Pull PCA9532 GPIO #8 low to power off the machine.
 212  */
 213 static void n2100_power_off(void)
 214 {
 215         local_irq_disable();
 216
 217         /* Start condition, I2C address of PCA9532, write transaction.  */
 218         *IOP3XX_IDBR0 = 0xc0;
 219         *IOP3XX_ICR0 = 0xe9;
 220         mdelay(1);
 221
 222         /* Write address 0x08.  */
 223         *IOP3XX_IDBR0 = 0x08;
 224         *IOP3XX_ICR0 = 0xe8;
 225         mdelay(1);
 226
 227         /* Write data 0x01, stop condition.  */
 228         *IOP3XX_IDBR0 = 0x01;
 229         *IOP3XX_ICR0 = 0xea;
 230
 231         while (1)
 232                 ;
 233 }
 234
 235
 236 static struct timer_list power_button_poll_timer;
 237
 238 static void power_button_poll(unsigned long dummy)
 239 {
 240         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
 241                 ctrl_alt_del();
 242                 return;
 243         }
 244
 245         power_button_poll_timer.expires = jiffies + (HZ / 10);
 246         add_timer(&power_button_poll_timer);
 247 }
 248
 249
 250 static void __init n2100_init_machine(void)
 251 {
 252         platform_device_register(&iop3xx_i2c0_device);
 253         platform_device_register(&n2100_flash_device);
 254         platform_device_register(&n2100_serial_device);
 255         platform_device_register(&iop3xx_dma_0_channel);
 256         platform_device_register(&iop3xx_dma_1_channel);
 257
 258         i2c_register_board_info(0, n2100_i2c_devices,
 259                 ARRAY_SIZE(n2100_i2c_devices));
 260
 261         pm_power_off = n2100_power_off;
 262
 263         init_timer(&power_button_poll_timer);
 264         power_button_poll_timer.function = power_button_poll;
 265         power_button_poll_timer.expires = jiffies + (HZ / 10);
 266         add_timer(&power_button_poll_timer);
 267 }
 268
 269 MACHINE_START(N2100, "Thecus N2100")
 270         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 271         .phys_io        = N2100_UART,
 272         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
 273         .boot_params    = 0xa0000100,
 274         .map_io         = n2100_map_io,
 275         .init_irq       = iop32x_init_irq,
 276         .timer          = &n2100_timer,
 277         .init_machine   = n2100_init_machine,
 278 MACHINE_END