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/config.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/mm.h>
  25 #include <linux/sched.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/bitops.h>
  28 #include <linux/pci.h>
  29 #include <linux/ioport.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/serial.h>
  33 #include <linux/tty.h>
  34 #include <linux/serial_core.h>
  35 #include <linux/device.h>
  36
  37 #include <asm/io.h>
  38 #include <asm/irq.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/page.h>
  41 #include <asm/system.h>
  42 #include <asm/hardware.h>
  43 #include <asm/mach-types.h>
  44
  45 #include <asm/mach/pci.h>
  46 #include <asm/mach/map.h>
  47 #include <asm/mach/irq.h>
  48 #include <asm/mach/time.h>
  49 #include <asm/mach/arch.h>
  50 #include <asm/mach/flash.h>
  51
  52 /*************************************************************************
  53  * ENP-2611 timer tick configuration
  54  *************************************************************************/
  55 static void __init enp2611_timer_init(void)
  56 {
  57         ixp2000_init_time(50 * 1000 * 1000);
  58 }
  59
  60 static struct sys_timer enp2611_timer = {
  61         .init           = enp2611_timer_init,
  62         .offset         = ixp2000_gettimeoffset,
  63 };
  64
  65
  66 /*************************************************************************
  67  * ENP-2611 PCI
  68  *************************************************************************/
  69 static int enp2611_pci_setup(int nr, struct pci_sys_data *sys)
  70 {
  71         sys->mem_offset = 0xe0000000;
  72         ixp2000_pci_setup(nr, sys);
  73         return 1;
  74 }
  75
  76 static void __init enp2611_pci_preinit(void)
  77 {
  78         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
  79         ixp2000_pci_preinit();
  80 }
  81
  82 static inline int enp2611_pci_valid_device(struct pci_bus *bus,
  83                                                 unsigned int devfn)
  84 {
  85         /* The 82559 ethernet controller appears at both PCI:1:0:0 and
  86          * PCI:1:2:0, so let's pretend the second one isn't there.
  87          */
  88         if (bus->number == 0x01 && devfn == 0x10)
  89                 return 0;
  90
  91         return 1;
  92 }
  93
  94 static int enp2611_pci_read_config(struct pci_bus *bus, unsigned int devfn,
  95                                         int where, int size, u32 *value)
  96 {
  97         if (enp2611_pci_valid_device(bus, devfn))
  98                 return ixp2000_pci_read_config(bus, devfn, where, size, value);
  99
 100         return PCIBIOS_DEVICE_NOT_FOUND;
 101 }
 102
 103 static int enp2611_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 104                                         int where, int size, u32 value)
 105 {
 106         if (enp2611_pci_valid_device(bus, devfn))
 107                 return ixp2000_pci_write_config(bus, devfn, where, size, value);
 108
 109         return PCIBIOS_DEVICE_NOT_FOUND;
 110 }
 111
 112 static struct pci_ops enp2611_pci_ops = {
 113         .read   = enp2611_pci_read_config,
 114         .write  = enp2611_pci_write_config
 115 };
 116
 117 static struct pci_bus * __init enp2611_pci_scan_bus(int nr,
 118                                                 struct pci_sys_data *sys)
 119 {
 120         return pci_scan_bus(sys->busnr, &enp2611_pci_ops, sys);
 121 }
 122
 123 static int __init enp2611_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 124 {
 125         int irq;
 126
 127         if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 0) {
 128                 /* IXP2400. */
 129                 irq = IRQ_IXP2000_PCIA;
 130         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 1) {
 131                 /* 21555 non-transparent bridge.  */
 132                 irq = IRQ_IXP2000_PCIB;
 133         } else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 4) {
 134                 /* PCI2050B transparent bridge.  */
 135                 irq = -1;
 136         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 0) {
 137                 /* 82559 ethernet.  */
 138                 irq = IRQ_IXP2000_PCIA;
 139         } else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 1) {
 140                 /* SPI-3 option board.  */
 141                 irq = IRQ_IXP2000_PCIB;
 142         } else {
 143                 printk(KERN_ERR "enp2611_pci_map_irq() called for unknown "
 144                                 "device PCI:%d:%d:%d\n", dev->bus->number,
 145                                 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 146                 irq = -1;
 147         }
 148
 149         return irq;
 150 }
 151
 152 struct hw_pci enp2611_pci __initdata = {
 153         .nr_controllers = 1,
 154         .setup          = enp2611_pci_setup,
 155         .preinit        = enp2611_pci_preinit,
 156         .scan           = enp2611_pci_scan_bus,
 157         .map_irq        = enp2611_pci_map_irq,
 158 };
 159
 160 int __init enp2611_pci_init(void)
 161 {
 162         if (machine_is_enp2611())
 163                 pci_common_init(&enp2611_pci);
 164
 165         return 0;
 166 }
 167
 168 subsys_initcall(enp2611_pci_init);
 169
 170
 171 /*************************************************************************
 172  * ENP-2611 Machine Intialization
 173  *************************************************************************/
 174 static struct flash_platform_data enp2611_flash_platform_data = {
 175         .map_name       = "cfi_probe",
 176         .width          = 1,
 177 };
 178
 179 static struct ixp2000_flash_data enp2611_flash_data = {
 180         .platform_data  = &enp2611_flash_platform_data,
 181         .nr_banks       = 1
 182 };
 183
 184 static struct resource enp2611_flash_resource = {
 185         .start          = 0xc4000000,
 186         .end            = 0xc4000000 + 0x00ffffff,
 187         .flags          = IORESOURCE_MEM,
 188 };
 189
 190 static struct platform_device enp2611_flash = {
 191         .name           = "IXP2000-Flash",
 192         .id             = 0,
 193         .dev            = {
 194                 .platform_data = &enp2611_flash_data,
 195         },
 196         .num_resources  = 1,
 197         .resource       = &enp2611_flash_resource,
 198 };
 199
 200 static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
 201         .sda_pin        = ENP2611_GPIO_SDA,
 202         .scl_pin        = ENP2611_GPIO_SCL,
 203 };
 204
 205 static struct platform_device enp2611_i2c_controller = {
 206         .name           = "IXP2000-I2C",
 207         .id             = 0,
 208         .dev            = {
 209                 .platform_data = &enp2611_i2c_gpio_pins
 210         },
 211         .num_resources  = 0
 212 };
 213
 214 static struct platform_device *enp2611_devices[] __initdata = {
 215         &enp2611_flash,
 216         &enp2611_i2c_controller
 217 };
 218
 219 static void __init enp2611_init_machine(void)
 220 {
 221         platform_add_devices(enp2611_devices, ARRAY_SIZE(enp2611_devices));
 222         ixp2000_uart_init();
 223 }
 224
 225
 226 MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
 227         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 228         .phys_ram       = 0x00000000,
 229         .phys_io        = IXP2000_UART_PHYS_BASE,
 230         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
 231         .boot_params    = 0x00000100,
 232         .map_io         = ixp2000_map_io,
 233         .init_irq       = ixp2000_init_irq,
 234         .timer          = &enp2611_timer,
 235         .init_machine   = enp2611_init_machine,
 236 MACHINE_END
 237
 238