release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-ixp2000/enp2611.c

   1 /*
   2  * arch/arm/mach-ixp2000/enp2611.c
   3  *
   4  * Radisys ENP-2611 support.
   5  *
   6  * Created 2004 by Lennert Buytenhek from the ixdp2x01 code.  The
   7  * original version carries the following notices:
   8  *
   9  * Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
  10  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
  11  *
  12  * Copyright (C) 2002-2003 Intel Corp.
  13  * Copyright (C) 2003-2004 MontaVista Software, Inc.
  14  *
  15  *  This program is free software; you can redistribute  it and/or modify it
  16  *  under  the terms of  the GNU General  Public License as published by the
  17  *  Free Software Foundation;  either version 2 of the  License, or (at your
  18  *  option) any later version.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/mm.h>
  24 #include <linux/sched.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/bitops.h>
  27 #include <linux/pci.h>
  28 #include <linux/ioport.h>
  29 #include <linux/slab.h>
  30 #include <linux/delay.h>
  31 #include <linux/serial.h>
  32 #include <linux/tty.h>
  33 #include <linux/serial_core.h>
  34 #include <linux/platform_device.h>
  35
  36 #include <asm/io.h>
  37 #include <asm/irq.h>
  38 #include <asm/pgtable.h>
  39 #include <asm/page.h>
  40 #include <asm/system.h>
  41 #include <asm/hardware.h>
  42 #include <asm/mach-types.h>
  43
  44 #include <asm/mach/pci.h>
  45 #include <asm/mach/map.h>
  46 #include <asm/mach/irq.h>
  47 #include <asm/mach/time.h>
  48 #include <asm/mach/arch.h>
  49 #include <asm/mach/flash.h>
  50
  51 /*************************************************************************
  52  * ENP-2611 timer tick configuration
  53  *************************************************************************/
  54 static void __init enp2611_timer_init(void)
  55 {
  56         ixp2000_init_time(50 * 1000 * 1000);
  57 }
  58
  59 static struct sys_timer enp2611_timer = {
  60         .init           = enp2611_timer_init,
  61         .offset         = ixp2000_gettimeoffset,
  62 };
  63
  64
  65 /*************************************************************************
  66  * ENP-2611 I/O
  67  *************************************************************************/
  68 static struct map_desc enp2611_io_desc[] __initdata = {
  69         {
  70                 .virtual        = ENP2611_CALEB_VIRT_BASE,
  71                 .pfn            = __phys_to_pfn(ENP2611_CALEB_PHYS_BASE),
  72                 .length         = ENP2611_CALEB_SIZE,
  73                 .type           = MT_DEVICE_IXP2000,
  74         }, {
  75                 .virtual        = ENP2611_PM3386_0_VIRT_BASE,
  76                 .pfn            = __phys_to_pfn(ENP2611_PM3386_0_PHYS_BASE),
  77                 .length         = ENP2611_PM3386_0_SIZE,
  78                 .type           = MT_DEVICE_IXP2000,
  79         }, {
  80                 .virtual        = ENP2611_PM3386_1_VIRT_BASE,
  81                 .pfn            = __phys_to_pfn(ENP2611_PM3386_1_PHYS_BASE),
  82                 .length         = ENP2611_PM3386_1_SIZE,
  83                 .type           = MT_DEVICE_IXP2000,
  84         }
  85 };
  86
  87 void __init enp2611_map_io(void)
  88 {
  89         ixp2000_map_io();
  90         iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
  91 }
  92
  93
  94 /*************************************************************************
  95  * ENP-2611 PCI
  96  *************************************************************************/
  97 static int enp2611_pci_setup(int nr, struct pci_sys_data *sys)
  98 {
  99         sys->mem_offset = 0xe0000000;
 100         ixp2000_pci_setup(nr, sys);
 101         return 1;
 102 }
 103
 104 static void __init enp2611_pci_preinit(void)
 105 {
 106         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
 107         ixp2000_pci_preinit();
 108         pcibios_setup("firmware");
 109 }
 110
 111 static inline int enp2611_pci_valid_device(struct pci_bus *bus,
 112                                                 unsigned int devfn)
 113 {
 114         /* The 82559 ethernet controller appears at both PCI:1:0:0 and
 115          * PCI:1:2:0, so let's pretend the second one isn't there.
 116          */
 117         if (bus->number == 0x01 && devfn == 0x10)
 118                 return 0;
 119
 120         return 1;
 121 }
 122
 123 static int enp2611_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 124                                         int where, int size, u32 *value)
 125 {
 126         if (enp2611_pci_valid_device(bus, devfn))
 127                 return ixp2000_pci_read_config(bus, devfn, where, size, value);
 128
 129         return PCIBIOS_DEVICE_NOT_FOUND;
 130 }
 131
 132 static int enp2611_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 133                                         int where, int size, u32 value)
 134 {
 135         if (enp2611_pci_valid_device(bus, devfn))
 136                 return ixp2000_pci_write_config(bus, devfn, where, size, value);
 137
 138         return PCIBIOS_DEVICE_NOT_FOUND;
 139 }
 140
 141 static struct pci_ops enp2611_pci_ops = {
 142         .read   = enp2611_pci_read_config,
 143         .write  = enp2611_pci_write_config
 144 };
 145
 146 static struct pci_bus * __init enp2611_pci_scan_bus(int nr,
 147                                                 struct pci_sys_data *sys)
 148 {
 149         return pci_scan_bus(sys->busnr, &enp2611_pci_ops, sys);
 150 }
 151
 152 static int __init enp2611_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 153 {
 154         int irq;
 155
 156         if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 0) {
 157                 /* IXP2400. */
 158                 irq = IRQ_IXP2000_PCIA;
 159         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 1) {
 160                 /* 21555 non-transparent bridge.  */
 161                 irq = IRQ_IXP2000_PCIB;
 162         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 4) {
 163                 /* PCI2050B transparent bridge.  */
 164                 irq = -1;
 165         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 0) {
 166                 /* 82559 ethernet.  */
 167                 irq = IRQ_IXP2000_PCIA;
 168         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 1) {
 169                 /* SPI-3 option board.  */
 170                 irq = IRQ_IXP2000_PCIB;
 171         } else {
 172                 printk(KERN_ERR "enp2611_pci_map_irq() called for unknown "
 173                                 "device PCI:%d:%d:%d\n", dev->bus->number,
 174                                 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 175                 irq = -1;
 176         }
 177
 178         return irq;
 179 }
 180
 181 struct hw_pci enp2611_pci __initdata = {
 182         .nr_controllers = 1,
 183         .setup          = enp2611_pci_setup,
 184         .preinit        = enp2611_pci_preinit,
 185         .scan           = enp2611_pci_scan_bus,
 186         .map_irq        = enp2611_pci_map_irq,
 187 };
 188
 189 int __init enp2611_pci_init(void)
 190 {
 191         if (machine_is_enp2611())
 192                 pci_common_init(&enp2611_pci);
 193
 194         return 0;
 195 }
 196
 197 subsys_initcall(enp2611_pci_init);
 198
 199
 200 /*************************************************************************
 201  * ENP-2611 Machine Initialization
 202  *************************************************************************/
 203 static struct flash_platform_data enp2611_flash_platform_data = {
 204         .map_name       = "cfi_probe",
 205         .width          = 1,
 206 };
 207
 208 static struct ixp2000_flash_data enp2611_flash_data = {
 209         .platform_data  = &enp2611_flash_platform_data,
 210         .nr_banks       = 1
 211 };
 212
 213 static struct resource enp2611_flash_resource = {
 214         .start          = 0xc4000000,
 215         .end            = 0xc4000000 + 0x00ffffff,
 216         .flags          = IORESOURCE_MEM,
 217 };
 218
 219 static struct platform_device enp2611_flash = {
 220         .name           = "IXP2000-Flash",
 221         .id             = 0,
 222         .dev            = {
 223                 .platform_data = &enp2611_flash_data,
 224         },
 225         .num_resources  = 1,
 226         .resource       = &enp2611_flash_resource,
 227 };
 228
 229 static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
 230         .sda_pin        = ENP2611_GPIO_SDA,
 231         .scl_pin        = ENP2611_GPIO_SCL,
 232 };
 233
 234 static struct platform_device enp2611_i2c_controller = {
 235         .name           = "IXP2000-I2C",
 236         .id             = 0,
 237         .dev            = {
 238                 .platform_data = &enp2611_i2c_gpio_pins
 239         },
 240         .num_resources  = 0
 241 };
 242
 243 static struct platform_device *enp2611_devices[] __initdata = {
 244         &enp2611_flash,
 245         &enp2611_i2c_controller
 246 };
 247
 248 static void __init enp2611_init_machine(void)
 249 {
 250         platform_add_devices(enp2611_devices, ARRAY_SIZE(enp2611_devices));
 251         ixp2000_uart_init();
 252 }
 253
 254
 255 MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
 256         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 257         .phys_io        = IXP2000_UART_PHYS_BASE,
 258         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 259         .boot_params    = 0x00000100,
 260         .map_io         = enp2611_map_io,
 261         .init_irq       = ixp2000_init_irq,
 262         .timer          = &enp2611_timer,
 263         .init_machine   = enp2611_init_machine,
 264 MACHINE_END
 265
 266