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