release/src-rt-6.x.4708/linux/linux-2.6.36/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/delay.h>
  30 #include <linux/serial.h>
  31 #include <linux/tty.h>
  32 #include <linux/serial_core.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/io.h>
  35
  36 #include <asm/irq.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/page.h>
  39 #include <asm/system.h>
  40 #include <mach/hardware.h>
  41 #include <asm/mach-types.h>
  42
  43 #include <asm/mach/pci.h>
  44 #include <asm/mach/map.h>
  45 #include <asm/mach/irq.h>
  46 #include <asm/mach/time.h>
  47 #include <asm/mach/arch.h>
  48 #include <asm/mach/flash.h>
  49
  50 /*************************************************************************
  51  * ENP-2611 timer tick configuration
  52  *************************************************************************/
  53 static void __init enp2611_timer_init(void)
  54 {
  55         ixp2000_init_time(50 * 1000 * 1000);
  56 }
  57
  58 static struct sys_timer enp2611_timer = {
  59         .init           = enp2611_timer_init,
  60         .offset         = ixp2000_gettimeoffset,
  61 };
  62
  63
  64 /*************************************************************************
  65  * ENP-2611 I/O
  66  *************************************************************************/
  67 static struct map_desc enp2611_io_desc[] __initdata = {
  68         {
  69                 .virtual        = ENP2611_CALEB_VIRT_BASE,
  70                 .pfn            = __phys_to_pfn(ENP2611_CALEB_PHYS_BASE),
  71                 .length         = ENP2611_CALEB_SIZE,
  72                 .type           = MT_DEVICE,
  73         }, {
  74                 .virtual        = ENP2611_PM3386_0_VIRT_BASE,
  75                 .pfn            = __phys_to_pfn(ENP2611_PM3386_0_PHYS_BASE),
  76                 .length         = ENP2611_PM3386_0_SIZE,
  77                 .type           = MT_DEVICE,
  78         }, {
  79                 .virtual        = ENP2611_PM3386_1_VIRT_BASE,
  80                 .pfn            = __phys_to_pfn(ENP2611_PM3386_1_PHYS_BASE),
  81                 .length         = ENP2611_PM3386_1_SIZE,
  82                 .type           = MT_DEVICE,
  83         }
  84 };
  85
  86 void __init enp2611_map_io(void)
  87 {
  88         ixp2000_map_io();
  89         iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
  90 }
  91
  92
  93 /*************************************************************************
  94  * ENP-2611 PCI
  95  *************************************************************************/
  96 static int enp2611_pci_setup(int nr, struct pci_sys_data *sys)
  97 {
  98         sys->mem_offset = 0xe0000000;
  99         ixp2000_pci_setup(nr, sys);
 100         return 1;
 101 }
 102
 103 static void __init enp2611_pci_preinit(void)
 104 {
 105         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
 106         ixp2000_pci_preinit();
 107         pcibios_setup("firmware");
 108 }
 109
 110 static inline int enp2611_pci_valid_device(struct pci_bus *bus,
 111                                                 unsigned int devfn)
 112 {
 113         /* The 82559 ethernet controller appears at both PCI:1:0:0 and
 114          * PCI:1:2:0, so let's pretend the second one isn't there.
 115          */
 116         if (bus->number == 0x01 && devfn == 0x10)
 117                 return 0;
 118
 119         return 1;
 120 }
 121
 122 static int enp2611_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 123                                         int where, int size, u32 *value)
 124 {
 125         if (enp2611_pci_valid_device(bus, devfn))
 126                 return ixp2000_pci_read_config(bus, devfn, where, size, value);
 127
 128         return PCIBIOS_DEVICE_NOT_FOUND;
 129 }
 130
 131 static int enp2611_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 132                                         int where, int size, u32 value)
 133 {
 134         if (enp2611_pci_valid_device(bus, devfn))
 135                 return ixp2000_pci_write_config(bus, devfn, where, size, value);
 136
 137         return PCIBIOS_DEVICE_NOT_FOUND;
 138 }
 139
 140 static struct pci_ops enp2611_pci_ops = {
 141         .read   = enp2611_pci_read_config,
 142         .write  = enp2611_pci_write_config
 143 };
 144
 145 static struct pci_bus * __init enp2611_pci_scan_bus(int nr,
 146                                                 struct pci_sys_data *sys)
 147 {
 148         return pci_scan_bus(sys->busnr, &enp2611_pci_ops, sys);
 149 }
 150
 151 static int __init enp2611_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 152 {
 153         int irq;
 154
 155         if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 0) {
 156                 /* IXP2400. */
 157                 irq = IRQ_IXP2000_PCIA;
 158         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 1) {
 159                 /* 21555 non-transparent bridge.  */
 160                 irq = IRQ_IXP2000_PCIB;
 161         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 4) {
 162                 /* PCI2050B transparent bridge.  */
 163                 irq = -1;
 164         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 0) {
 165                 /* 82559 ethernet.  */
 166                 irq = IRQ_IXP2000_PCIA;
 167         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 1) {
 168                 /* SPI-3 option board.  */
 169                 irq = IRQ_IXP2000_PCIB;
 170         } else {
 171                 printk(KERN_ERR "enp2611_pci_map_irq() called for unknown "
 172                                 "device PCI:%d:%d:%d\n", dev->bus->number,
 173                                 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 174                 irq = -1;
 175         }
 176
 177         return irq;
 178 }
 179
 180 struct hw_pci enp2611_pci __initdata = {
 181         .nr_controllers = 1,
 182         .setup          = enp2611_pci_setup,
 183         .preinit        = enp2611_pci_preinit,
 184         .scan           = enp2611_pci_scan_bus,
 185         .map_irq        = enp2611_pci_map_irq,
 186 };
 187
 188 int __init enp2611_pci_init(void)
 189 {
 190         if (machine_is_enp2611())
 191                 pci_common_init(&enp2611_pci);
 192
 193         return 0;
 194 }
 195
 196 subsys_initcall(enp2611_pci_init);
 197
 198
 199 /*************************************************************************
 200  * ENP-2611 Machine Initialization
 201  *************************************************************************/
 202 static struct flash_platform_data enp2611_flash_platform_data = {
 203         .map_name       = "cfi_probe",
 204         .width          = 1,
 205 };
 206
 207 static struct ixp2000_flash_data enp2611_flash_data = {
 208         .platform_data  = &enp2611_flash_platform_data,
 209         .nr_banks       = 1
 210 };
 211
 212 static struct resource enp2611_flash_resource = {
 213         .start          = 0xc4000000,
 214         .end            = 0xc4000000 + 0x00ffffff,
 215         .flags          = IORESOURCE_MEM,
 216 };
 217
 218 static struct platform_device enp2611_flash = {
 219         .name           = "IXP2000-Flash",
 220         .id             = 0,
 221         .dev            = {
 222                 .platform_data = &enp2611_flash_data,
 223         },
 224         .num_resources  = 1,
 225         .resource       = &enp2611_flash_resource,
 226 };
 227
 228 static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
 229         .sda_pin        = ENP2611_GPIO_SDA,
 230         .scl_pin        = ENP2611_GPIO_SCL,
 231 };
 232
 233 static struct platform_device enp2611_i2c_controller = {
 234         .name           = "IXP2000-I2C",
 235         .id             = 0,
 236         .dev            = {
 237                 .platform_data = &enp2611_i2c_gpio_pins
 238         },
 239         .num_resources  = 0
 240 };
 241
 242 static struct platform_device *enp2611_devices[] __initdata = {
 243         &enp2611_flash,
 244         &enp2611_i2c_controller
 245 };
 246
 247 static void __init enp2611_init_machine(void)
 248 {
 249         platform_add_devices(enp2611_devices, ARRAY_SIZE(enp2611_devices));
 250         ixp2000_uart_init();
 251 }
 252
 253
 254 MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
 255         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 256         .phys_io        = IXP2000_UART_PHYS_BASE,
 257         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 258         .boot_params    = 0x00000100,
 259         .map_io         = enp2611_map_io,
 260         .init_irq       = ixp2000_init_irq,
 261         .timer          = &enp2611_timer,
 262         .init_machine   = enp2611_init_machine,
 263 MACHINE_END