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 #include "gpio-iop32x.h"
  41
  42 /*
  43  * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
  44  * same machine id, and the processor type was used to select board type.
  45  * However this assumption breaks for an iq80219 board which is an iop219
  46  * processor on an iq31244 board.  The force_ep80219 flag has been added
  47  * for old boot loaders using the iq31244 machine id for an ep80219 platform.
  48  */
  49 static int force_ep80219;
  50
  51 static int is_80219(void)
  52 {
  53         return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
  54 }
  55
  56 static int is_ep80219(void)
  57 {
  58         if (machine_is_ep80219() || force_ep80219)
  59                 return 1;
  60         else
  61                 return 0;
  62 }
  63
  64
  65 /*
  66  * EP80219/IQ31244 timer tick configuration.
  67  */
  68 static void __init iq31244_timer_init(void)
  69 {
  70         if (is_ep80219()) {
  71                 /* 33.333 MHz crystal.  */
  72                 iop_init_time(200000000);
  73         } else {
  74                 /* 33.000 MHz crystal.  */
  75                 iop_init_time(198000000);
  76         }
  77 }
  78
  79
  80 /*
  81  * IQ31244 I/O.
  82  */
  83 static struct map_desc iq31244_io_desc[] __initdata = {
  84         {       /* on-board devices */
  85                 .virtual        = IQ31244_UART,
  86                 .pfn            = __phys_to_pfn(IQ31244_UART),
  87                 .length         = 0x00100000,
  88                 .type           = MT_DEVICE,
  89         },
  90 };
  91
  92 void __init iq31244_map_io(void)
  93 {
  94         iop3xx_map_io();
  95         iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
  96 }
  97
  98
  99 /*
 100  * EP80219/IQ31244 PCI.
 101  */
 102 static int __init
 103 ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 104 {
 105         int irq;
 106
 107         if (slot == 0) {
 108                 /* CFlash */
 109                 irq = IRQ_IOP32X_XINT1;
 110         } else if (slot == 1) {
 111                 /* 82551 Pro 100 */
 112                 irq = IRQ_IOP32X_XINT0;
 113         } else if (slot == 2) {
 114                 /* PCI-X Slot */
 115                 irq = IRQ_IOP32X_XINT3;
 116         } else if (slot == 3) {
 117                 /* SATA */
 118                 irq = IRQ_IOP32X_XINT2;
 119         } else {
 120                 printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
 121                         "device PCI:%d:%d:%d\n", dev->bus->number,
 122                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 123                 irq = -1;
 124         }
 125
 126         return irq;
 127 }
 128
 129 static struct hw_pci ep80219_pci __initdata = {
 130         .nr_controllers = 1,
 131         .ops            = &iop3xx_ops,
 132         .setup          = iop3xx_pci_setup,
 133         .preinit        = iop3xx_pci_preinit,
 134         .map_irq        = ep80219_pci_map_irq,
 135 };
 136
 137 static int __init
 138 iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 139 {
 140         int irq;
 141
 142         if (slot == 0) {
 143                 /* CFlash */
 144                 irq = IRQ_IOP32X_XINT1;
 145         } else if (slot == 1) {
 146                 /* SATA */
 147                 irq = IRQ_IOP32X_XINT2;
 148         } else if (slot == 2) {
 149                 /* PCI-X Slot */
 150                 irq = IRQ_IOP32X_XINT3;
 151         } else if (slot == 3) {
 152                 /* 82546 GigE */
 153                 irq = IRQ_IOP32X_XINT0;
 154         } else {
 155                 printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
 156                         "device PCI:%d:%d:%d\n", dev->bus->number,
 157                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 158                 irq = -1;
 159         }
 160
 161         return irq;
 162 }
 163
 164 static struct hw_pci iq31244_pci __initdata = {
 165         .nr_controllers = 1,
 166         .ops            = &iop3xx_ops,
 167         .setup          = iop3xx_pci_setup,
 168         .preinit        = iop3xx_pci_preinit,
 169         .map_irq        = iq31244_pci_map_irq,
 170 };
 171
 172 static int __init iq31244_pci_init(void)
 173 {
 174         if (is_ep80219())
 175                 pci_common_init(&ep80219_pci);
 176         else if (machine_is_iq31244()) {
 177                 if (is_80219()) {
 178                         printk("note: iq31244 board type has been selected\n");
 179                         printk("note: to select ep80219 operation:\n");
 180                         printk("\t1/ specify \"force_ep80219\" on the kernel"
 181                                 " command line\n");
 182                         printk("\t2/ update boot loader to pass"
 183                                 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
 184                 }
 185                 pci_common_init(&iq31244_pci);
 186         }
 187
 188         return 0;
 189 }
 190
 191 subsys_initcall(iq31244_pci_init);
 192
 193
 194 /*
 195  * IQ31244 machine initialisation.
 196  */
 197 static struct physmap_flash_data iq31244_flash_data = {
 198         .width          = 2,
 199 };
 200
 201 static struct resource iq31244_flash_resource = {
 202         .start          = 0xf0000000,
 203         .end            = 0xf07fffff,
 204         .flags          = IORESOURCE_MEM,
 205 };
 206
 207 static struct platform_device iq31244_flash_device = {
 208         .name           = "physmap-flash",
 209         .id             = 0,
 210         .dev            = {
 211                 .platform_data  = &iq31244_flash_data,
 212         },
 213         .num_resources  = 1,
 214         .resource       = &iq31244_flash_resource,
 215 };
 216
 217 static struct plat_serial8250_port iq31244_serial_port[] = {
 218         {
 219                 .mapbase        = IQ31244_UART,
 220                 .membase        = (char *)IQ31244_UART,
 221                 .irq            = IRQ_IOP32X_XINT1,
 222                 .flags          = UPF_SKIP_TEST,
 223                 .iotype         = UPIO_MEM,
 224                 .regshift       = 0,
 225                 .uartclk        = 1843200,
 226         },
 227         { },
 228 };
 229
 230 static struct resource iq31244_uart_resource = {
 231         .start          = IQ31244_UART,
 232         .end            = IQ31244_UART + 7,
 233         .flags          = IORESOURCE_MEM,
 234 };
 235
 236 static struct platform_device iq31244_serial_device = {
 237         .name           = "serial8250",
 238         .id             = PLAT8250_DEV_PLATFORM,
 239         .dev            = {
 240                 .platform_data          = iq31244_serial_port,
 241         },
 242         .num_resources  = 1,
 243         .resource       = &iq31244_uart_resource,
 244 };
 245
 246 /*
 247  * This function will send a SHUTDOWN_COMPLETE message to the PIC
 248  * controller over I2C.  We are not using the i2c subsystem since
 249  * we are going to power off and it may be removed
 250  */
 251 void ep80219_power_off(void)
 252 {
 253         /*
 254          * Send the Address byte w/ the start condition
 255          */
 256         *IOP3XX_IDBR1 = 0x60;
 257         *IOP3XX_ICR1 = 0xE9;
 258         mdelay(1);
 259
 260         /*
 261          * Send the START_MSG byte w/ no start or stop condition
 262          */
 263         *IOP3XX_IDBR1 = 0x0F;
 264         *IOP3XX_ICR1 = 0xE8;
 265         mdelay(1);
 266
 267         /*
 268          * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
 269          * stop condition
 270          */
 271         *IOP3XX_IDBR1 = 0x03;
 272         *IOP3XX_ICR1 = 0xE8;
 273         mdelay(1);
 274
 275         /*
 276          * Send an ignored byte w/ stop condition
 277          */
 278         *IOP3XX_IDBR1 = 0x00;
 279         *IOP3XX_ICR1 = 0xEA;
 280
 281         while (1)
 282                 ;
 283 }
 284
 285 static void __init iq31244_init_machine(void)
 286 {
 287         register_iop32x_gpio();
 288         platform_device_register(&iop3xx_i2c0_device);
 289         platform_device_register(&iop3xx_i2c1_device);
 290         platform_device_register(&iq31244_flash_device);
 291         platform_device_register(&iq31244_serial_device);
 292         platform_device_register(&iop3xx_dma_0_channel);
 293         platform_device_register(&iop3xx_dma_1_channel);
 294
 295         if (is_ep80219())
 296                 pm_power_off = ep80219_power_off;
 297
 298         if (!is_80219())
 299                 platform_device_register(&iop3xx_aau_channel);
 300 }
 301
 302 static int __init force_ep80219_setup(char *str)
 303 {
 304         force_ep80219 = 1;
 305         return 1;
 306 }
 307
 308 __setup("force_ep80219", force_ep80219_setup);
 309
 310 MACHINE_START(IQ31244, "Intel IQ31244")
 311         /* Maintainer: Intel Corp. */
 312         .atag_offset    = 0x100,
 313         .map_io         = iq31244_map_io,
 314         .init_irq       = iop32x_init_irq,
 315         .init_time      = iq31244_timer_init,
 316         .init_machine   = iq31244_init_machine,
 317         .restart        = iop3xx_restart,
 318 MACHINE_END
 319
 320 /* There should have been an ep80219 machine identifier from the beginning.
 321  * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 322  * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 323  * will be selected.
 324  */
 325 MACHINE_START(EP80219, "Intel EP80219")
 326         /* Maintainer: Intel Corp. */
 327         .atag_offset    = 0x100,
 328         .map_io         = iq31244_map_io,
 329         .init_irq       = iop32x_init_irq,
 330         .init_time      = iq31244_timer_init,
 331         .init_machine   = iq31244_init_machine,
 332         .restart        = iop3xx_restart,
 333 MACHINE_END