arch/arm/mach-pxa/mp900.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/mp900.c
   3  *
   4  *  Support for the NEC MobilePro900/C platform
   5  *
   6  *  Based on mach-pxa/gumstix.c
   7  *
   8  *  2007, 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
   9  *  2007, 2008 Michael Petchkovsky <mkpetch@internode.on.net>
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/device.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/types.h>
  20 #include <linux/usb/isp116x.h>
  21
  22 #include <mach/hardware.h>
  23 #include <mach/pxa-regs.h>
  24 #include <asm/mach-types.h>
  25 #include <asm/mach/arch.h>
  26 #include "generic.h"
  27
  28 static void isp116x_pfm_delay(struct device *dev, int delay)
  29 {
  30
  31         /* 400Mhz PXA2 = 2.5ns / instruction */
  32
  33         int cyc = delay / 10;
  34
  35         /* 4 Instructions = 4 x 2.5ns = 10ns */
  36         __asm__ volatile ("0:\n"
  37                 "subs %0, %1, #1\n"
  38                 "bge 0b\n"
  39                 :"=r" (cyc)
  40                 :"0"(cyc)
  41         );
  42 }
  43
  44 static struct isp116x_platform_data isp116x_pfm_data = {
  45         .remote_wakeup_enable = 1,
  46         .delay = isp116x_pfm_delay,
  47 };
  48
  49 static struct resource isp116x_pfm_resources[] = {
  50         [0] =   {
  51                 .start  = 0x0d000000,
  52                 .end    = 0x0d000000 + 1,
  53                 .flags  = IORESOURCE_MEM,
  54                 },
  55         [1] =   {
  56                 .start  = 0x0d000000 + 4,
  57                 .end    = 0x0d000000 + 5,
  58                 .flags  = IORESOURCE_MEM,
  59                 },
  60         [2] =   {
  61                 .start  = 61,
  62                 .end    = 61,
  63                 .flags  = IORESOURCE_IRQ,
  64                 },
  65 };
  66
  67 static struct platform_device mp900c_dummy_device = {
  68         .name           = "mp900c_dummy",
  69         .id             = -1,
  70 };
  71
  72 static struct platform_device mp900c_usb = {
  73         .name           = "isp116x-hcd",
  74         .num_resources  = ARRAY_SIZE(isp116x_pfm_resources),
  75         .resource       = isp116x_pfm_resources,
  76         .dev.platform_data = &isp116x_pfm_data,
  77 };
  78
  79 static struct platform_device *devices[] __initdata = {
  80         &mp900c_dummy_device,
  81         &mp900c_usb,
  82 };
  83
  84 static void __init mp900c_init(void)
  85 {
  86         printk(KERN_INFO "MobilePro 900/C machine init\n");
  87         platform_add_devices(devices, ARRAY_SIZE(devices));
  88 }
  89
  90 /* Maintainer - Michael Petchkovsky <mkpetch@internode.on.net> */
  91 MACHINE_START(NEC_MP900, "MobilePro900/C")
  92         .phys_io        = 0x40000000,
  93         .boot_params    = 0xa0220100,
  94         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
  95         .timer          = &pxa_timer,
  96         .map_io         = pxa_map_io,
  97         .init_irq       = pxa25x_init_irq,
  98         .init_machine   = mp900c_init,
  99 MACHINE_END
 100