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