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(const 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         .nr_controllers = 1,
 134         .ops            = &iop3xx_ops,
 135         .setup          = iop3xx_pci_setup,
 136         .preinit        = iop3xx_pci_preinit,
 137         .map_irq        = ep80219_pci_map_irq,
 138 };
 139
 140 static int __init
 141 iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 142 {
 143         int irq;
 144
 145         if (slot == 0) {
 146                 /* CFlash */
 147                 irq = IRQ_IOP32X_XINT1;
 148         } else if (slot == 1) {
 149                 /* SATA */
 150                 irq = IRQ_IOP32X_XINT2;
 151         } else if (slot == 2) {
 152                 /* PCI-X Slot */
 153                 irq = IRQ_IOP32X_XINT3;
 154         } else if (slot == 3) {
 155                 /* 82546 GigE */
 156                 irq = IRQ_IOP32X_XINT0;
 157         } else {
 158                 printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
 159                         "device PCI:%d:%d:%d\n", dev->bus->number,
 160                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 161                 irq = -1;
 162         }
 163
 164         return irq;
 165 }
 166
 167 static struct hw_pci iq31244_pci __initdata = {
 168         .nr_controllers = 1,
 169         .ops            = &iop3xx_ops,
 170         .setup          = iop3xx_pci_setup,
 171         .preinit        = iop3xx_pci_preinit,
 172         .map_irq        = iq31244_pci_map_irq,
 173 };
 174
 175 static int __init iq31244_pci_init(void)
 176 {
 177         if (is_ep80219())
 178                 pci_common_init(&ep80219_pci);
 179         else if (machine_is_iq31244()) {
 180                 if (is_80219()) {
 181                         printk("note: iq31244 board type has been selected\n");
 182                         printk("note: to select ep80219 operation:\n");
 183                         printk("\t1/ specify \"force_ep80219\" on the kernel"
 184                                 " command line\n");
 185                         printk("\t2/ update boot loader to pass"
 186                                 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
 187                 }
 188                 pci_common_init(&iq31244_pci);
 189         }
 190
 191         return 0;
 192 }
 193
 194 subsys_initcall(iq31244_pci_init);
 195
 196
 197 /*
 198  * IQ31244 machine initialisation.
 199  */
 200 static struct physmap_flash_data iq31244_flash_data = {
 201         .width          = 2,
 202 };
 203
 204 static struct resource iq31244_flash_resource = {
 205         .start          = 0xf0000000,
 206         .end            = 0xf07fffff,
 207         .flags          = IORESOURCE_MEM,
 208 };
 209
 210 static struct platform_device iq31244_flash_device = {
 211         .name           = "physmap-flash",
 212         .id             = 0,
 213         .dev            = {
 214                 .platform_data  = &iq31244_flash_data,
 215         },
 216         .num_resources  = 1,
 217         .resource       = &iq31244_flash_resource,
 218 };
 219
 220 static struct plat_serial8250_port iq31244_serial_port[] = {
 221         {
 222                 .mapbase        = IQ31244_UART,
 223                 .membase        = (char *)IQ31244_UART,
 224                 .irq            = IRQ_IOP32X_XINT1,
 225                 .flags          = UPF_SKIP_TEST,
 226                 .iotype         = UPIO_MEM,
 227                 .regshift       = 0,
 228                 .uartclk        = 1843200,
 229         },
 230         { },
 231 };
 232
 233 static struct resource iq31244_uart_resource = {
 234         .start          = IQ31244_UART,
 235         .end            = IQ31244_UART + 7,
 236         .flags          = IORESOURCE_MEM,
 237 };
 238
 239 static struct platform_device iq31244_serial_device = {
 240         .name           = "serial8250",
 241         .id             = PLAT8250_DEV_PLATFORM,
 242         .dev            = {
 243                 .platform_data          = iq31244_serial_port,
 244         },
 245         .num_resources  = 1,
 246         .resource       = &iq31244_uart_resource,
 247 };
 248
 249 /*
 250  * This function will send a SHUTDOWN_COMPLETE message to the PIC
 251  * controller over I2C.  We are not using the i2c subsystem since
 252  * we are going to power off and it may be removed
 253  */
 254 void ep80219_power_off(void)
 255 {
 256         /*
 257          * Send the Address byte w/ the start condition
 258          */
 259         *IOP3XX_IDBR1 = 0x60;
 260         *IOP3XX_ICR1 = 0xE9;
 261         mdelay(1);
 262
 263         /*
 264          * Send the START_MSG byte w/ no start or stop condition
 265          */
 266         *IOP3XX_IDBR1 = 0x0F;
 267         *IOP3XX_ICR1 = 0xE8;
 268         mdelay(1);
 269
 270         /*
 271          * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
 272          * stop condition
 273          */
 274         *IOP3XX_IDBR1 = 0x03;
 275         *IOP3XX_ICR1 = 0xE8;
 276         mdelay(1);
 277
 278         /*
 279          * Send an ignored byte w/ stop condition
 280          */
 281         *IOP3XX_IDBR1 = 0x00;
 282         *IOP3XX_ICR1 = 0xEA;
 283
 284         while (1)
 285                 ;
 286 }
 287
 288 static void __init iq31244_init_machine(void)
 289 {
 290         platform_device_register(&iop3xx_i2c0_device);
 291         platform_device_register(&iop3xx_i2c1_device);
 292         platform_device_register(&iq31244_flash_device);
 293         platform_device_register(&iq31244_serial_device);
 294         platform_device_register(&iop3xx_dma_0_channel);
 295         platform_device_register(&iop3xx_dma_1_channel);
 296
 297         if (is_ep80219())
 298                 pm_power_off = ep80219_power_off;
 299
 300         if (!is_80219())
 301                 platform_device_register(&iop3xx_aau_channel);
 302 }
 303
 304 static int __init force_ep80219_setup(char *str)
 305 {
 306         force_ep80219 = 1;
 307         return 1;
 308 }
 309
 310 __setup("force_ep80219", force_ep80219_setup);
 311
 312 MACHINE_START(IQ31244, "Intel IQ31244")
 313         /* Maintainer: Intel Corp. */
 314         .atag_offset    = 0x100,
 315         .map_io         = iq31244_map_io,
 316         .init_irq       = iop32x_init_irq,
 317         .timer          = &iq31244_timer,
 318         .init_machine   = iq31244_init_machine,
 319         .restart        = iop3xx_restart,
 320 MACHINE_END
 321
 322 /* There should have been an ep80219 machine identifier from the beginning.
 323  * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 324  * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 325  * will be selected.
 326  */
 327 MACHINE_START(EP80219, "Intel EP80219")
 328         /* Maintainer: Intel Corp. */
 329         .atag_offset    = 0x100,
 330         .map_io         = iq31244_map_io,
 331         .init_irq       = iop32x_init_irq,
 332         .timer          = &iq31244_timer,
 333         .init_machine   = iq31244_init_machine,
 334         .restart        = iop3xx_restart,
 335 MACHINE_END