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