release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-iop32x/iq31244.c

   1 /*
   2  * arch/arm/mach-iop32x/iq31244.c
   3  *
   4  * Board support code for the Intel EP80219 and IQ31244 platforms.
   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/serial_core.h>
  25 #include <linux/serial_8250.h>
  26 #include <linux/mtd/physmap.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/io.h>
  29 #include <mach/hardware.h>
  30 #include <asm/cputype.h>
  31 #include <asm/irq.h>
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/pci.h>
  35 #include <asm/mach/time.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/page.h>
  38 #include <asm/pgtable.h>
  39 #include <mach/time.h>
  40
  41 /*
  42  * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
  43  * same machine id, and the processor type was used to select board type.
  44  * However this assumption breaks for an iq80219 board which is an iop219
  45  * processor on an iq31244 board.  The force_ep80219 flag has been added
  46  * for old boot loaders using the iq31244 machine id for an ep80219 platform.
  47  */
  48 static int force_ep80219;
  49
  50 static int is_80219(void)
  51 {
  52         return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
  53 }
  54
  55 static int is_ep80219(void)
  56 {
  57         if (machine_is_ep80219() || force_ep80219)
  58                 return 1;
  59         else
  60                 return 0;
  61 }
  62
  63
  64 /*
  65  * EP80219/IQ31244 timer tick configuration.
  66  */
  67 static void __init iq31244_timer_init(void)
  68 {
  69         if (is_ep80219()) {
  70                 /* 33.333 MHz crystal.  */
  71                 iop_init_time(200000000);
  72         } else {
  73                 /* 33.000 MHz crystal.  */
  74                 iop_init_time(198000000);
  75         }
  76 }
  77
  78 static struct sys_timer iq31244_timer = {
  79         .init           = iq31244_timer_init,
  80 };
  81
  82
  83 /*
  84  * IQ31244 I/O.
  85  */
  86 static struct map_desc iq31244_io_desc[] __initdata = {
  87         {       /* on-board devices */
  88                 .virtual        = IQ31244_UART,
  89                 .pfn            = __phys_to_pfn(IQ31244_UART),
  90                 .length         = 0x00100000,
  91                 .type           = MT_DEVICE,
  92         },
  93 };
  94
  95 void __init iq31244_map_io(void)
  96 {
  97         iop3xx_map_io();
  98         iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
  99 }
 100
 101
 102 /*
 103  * EP80219/IQ31244 PCI.
 104  */
 105 static int __init
 106 ep80219_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 107 {
 108         int irq;
 109
 110         if (slot == 0) {
 111                 /* CFlash */
 112                 irq = IRQ_IOP32X_XINT1;
 113         } else if (slot == 1) {
 114                 /* 82551 Pro 100 */
 115                 irq = IRQ_IOP32X_XINT0;
 116         } else if (slot == 2) {
 117                 /* PCI-X Slot */
 118                 irq = IRQ_IOP32X_XINT3;
 119         } else if (slot == 3) {
 120                 /* SATA */
 121                 irq = IRQ_IOP32X_XINT2;
 122         } else {
 123                 printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
 124                         "device PCI:%d:%d:%d\n", dev->bus->number,
 125                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 126                 irq = -1;
 127         }
 128
 129         return irq;
 130 }
 131
 132 static struct hw_pci ep80219_pci __initdata = {
 133         .swizzle        = pci_std_swizzle,
 134         .nr_controllers = 1,
 135         .setup          = iop3xx_pci_setup,
 136         .preinit        = iop3xx_pci_preinit,
 137         .scan           = iop3xx_pci_scan_bus,
 138         .map_irq        = ep80219_pci_map_irq,
 139 };
 140
 141 static int __init
 142 iq31244_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 143 {
 144         int irq;
 145
 146         if (slot == 0) {
 147                 /* CFlash */
 148                 irq = IRQ_IOP32X_XINT1;
 149         } else if (slot == 1) {
 150                 /* SATA */
 151                 irq = IRQ_IOP32X_XINT2;
 152         } else if (slot == 2) {
 153                 /* PCI-X Slot */
 154                 irq = IRQ_IOP32X_XINT3;
 155         } else if (slot == 3) {
 156                 /* 82546 GigE */
 157                 irq = IRQ_IOP32X_XINT0;
 158         } else {
 159                 printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
 160                         "device PCI:%d:%d:%d\n", dev->bus->number,
 161                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 162                 irq = -1;
 163         }
 164
 165         return irq;
 166 }
 167
 168 static struct hw_pci iq31244_pci __initdata = {
 169         .swizzle        = pci_std_swizzle,
 170         .nr_controllers = 1,
 171         .setup          = iop3xx_pci_setup,
 172         .preinit        = iop3xx_pci_preinit,
 173         .scan           = iop3xx_pci_scan_bus,
 174         .map_irq        = iq31244_pci_map_irq,
 175 };
 176
 177 static int __init iq31244_pci_init(void)
 178 {
 179         if (is_ep80219())
 180                 pci_common_init(&ep80219_pci);
 181         else if (machine_is_iq31244()) {
 182                 if (is_80219()) {
 183                         printk("note: iq31244 board type has been selected\n");
 184                         printk("note: to select ep80219 operation:\n");
 185                         printk("\t1/ specify \"force_ep80219\" on the kernel"
 186                                 " command line\n");
 187                         printk("\t2/ update boot loader to pass"
 188                                 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
 189                 }
 190                 pci_common_init(&iq31244_pci);
 191         }
 192
 193         return 0;
 194 }
 195
 196 subsys_initcall(iq31244_pci_init);
 197
 198
 199 /*
 200  * IQ31244 machine initialisation.
 201  */
 202 static struct physmap_flash_data iq31244_flash_data = {
 203         .width          = 2,
 204 };
 205
 206 static struct resource iq31244_flash_resource = {
 207         .start          = 0xf0000000,
 208         .end            = 0xf07fffff,
 209         .flags          = IORESOURCE_MEM,
 210 };
 211
 212 static struct platform_device iq31244_flash_device = {
 213         .name           = "physmap-flash",
 214         .id             = 0,
 215         .dev            = {
 216                 .platform_data  = &iq31244_flash_data,
 217         },
 218         .num_resources  = 1,
 219         .resource       = &iq31244_flash_resource,
 220 };
 221
 222 static struct plat_serial8250_port iq31244_serial_port[] = {
 223         {
 224                 .mapbase        = IQ31244_UART,
 225                 .membase        = (char *)IQ31244_UART,
 226                 .irq            = IRQ_IOP32X_XINT1,
 227                 .flags          = UPF_SKIP_TEST,
 228                 .iotype         = UPIO_MEM,
 229                 .regshift       = 0,
 230                 .uartclk        = 1843200,
 231         },
 232         { },
 233 };
 234
 235 static struct resource iq31244_uart_resource = {
 236         .start          = IQ31244_UART,
 237         .end            = IQ31244_UART + 7,
 238         .flags          = IORESOURCE_MEM,
 239 };
 240
 241 static struct platform_device iq31244_serial_device = {
 242         .name           = "serial8250",
 243         .id             = PLAT8250_DEV_PLATFORM,
 244         .dev            = {
 245                 .platform_data          = iq31244_serial_port,
 246         },
 247         .num_resources  = 1,
 248         .resource       = &iq31244_uart_resource,
 249 };
 250
 251 /*
 252  * This function will send a SHUTDOWN_COMPLETE message to the PIC
 253  * controller over I2C.  We are not using the i2c subsystem since
 254  * we are going to power off and it may be removed
 255  */
 256 void ep80219_power_off(void)
 257 {
 258         /*
 259          * Send the Address byte w/ the start condition
 260          */
 261         *IOP3XX_IDBR1 = 0x60;
 262         *IOP3XX_ICR1 = 0xE9;
 263         mdelay(1);
 264
 265         /*
 266          * Send the START_MSG byte w/ no start or stop condition
 267          */
 268         *IOP3XX_IDBR1 = 0x0F;
 269         *IOP3XX_ICR1 = 0xE8;
 270         mdelay(1);
 271
 272         /*
 273          * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
 274          * stop condition
 275          */
 276         *IOP3XX_IDBR1 = 0x03;
 277         *IOP3XX_ICR1 = 0xE8;
 278         mdelay(1);
 279
 280         /*
 281          * Send an ignored byte w/ stop condition
 282          */
 283         *IOP3XX_IDBR1 = 0x00;
 284         *IOP3XX_ICR1 = 0xEA;
 285
 286         while (1)
 287                 ;
 288 }
 289
 290 static void __init iq31244_init_machine(void)
 291 {
 292         platform_device_register(&iop3xx_i2c0_device);
 293         platform_device_register(&iop3xx_i2c1_device);
 294         platform_device_register(&iq31244_flash_device);
 295         platform_device_register(&iq31244_serial_device);
 296         platform_device_register(&iop3xx_dma_0_channel);
 297         platform_device_register(&iop3xx_dma_1_channel);
 298
 299         if (is_ep80219())
 300                 pm_power_off = ep80219_power_off;
 301
 302         if (!is_80219())
 303                 platform_device_register(&iop3xx_aau_channel);
 304 }
 305
 306 static int __init force_ep80219_setup(char *str)
 307 {
 308         force_ep80219 = 1;
 309         return 1;
 310 }
 311
 312 __setup("force_ep80219", force_ep80219_setup);
 313
 314 MACHINE_START(IQ31244, "Intel IQ31244")
 315         /* Maintainer: Intel Corp. */
 316         .phys_io        = IQ31244_UART,
 317         .io_pg_offst    = ((IQ31244_UART) >> 18) & 0xfffc,
 318         .boot_params    = 0xa0000100,
 319         .map_io         = iq31244_map_io,
 320         .init_irq       = iop32x_init_irq,
 321         .timer          = &iq31244_timer,
 322         .init_machine   = iq31244_init_machine,
 323 MACHINE_END
 324
 325 /* There should have been an ep80219 machine identifier from the beginning.
 326  * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 327  * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 328  * will be selected.
 329  */
 330 MACHINE_START(EP80219, "Intel EP80219")
 331         /* Maintainer: Intel Corp. */
 332         .phys_io        = IQ31244_UART,
 333         .io_pg_offst    = ((IQ31244_UART) >> 18) & 0xfffc,
 334         .boot_params    = 0xa0000100,
 335         .map_io         = iq31244_map_io,
 336         .init_irq       = iop32x_init_irq,
 337         .timer          = &iq31244_timer,
 338         .init_machine   = iq31244_init_machine,
 339 MACHINE_END