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kernel/linux-imx6_3.14.28/arch/arm/mach-pxa/mp900.c 2.31 KB
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  /*
   *  linux/arch/arm/mach-pxa/mp900.c
   *
   *  Support for the NEC MobilePro900/C platform
   *
   *  Based on mach-pxa/gumstix.c
   *
   *  2007, 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
   *  2007, 2008 Michael Petchkovsky <mkpetch@internode.on.net>
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License version 2 as
   *  published by the Free Software Foundation.
   */
  
  #include <linux/init.h>
  #include <linux/device.h>
  #include <linux/platform_device.h>
  #include <linux/types.h>
  #include <linux/usb/isp116x.h>
  
  #include <asm/mach-types.h>
  #include <asm/mach/arch.h>
  
  #include <mach/pxa25x.h>
  #include "generic.h"
  
  static void isp116x_pfm_delay(struct device *dev, int delay)
  {
  
  	/* 400Mhz PXA2 = 2.5ns / instruction */
  
  	int cyc = delay / 10;
  
  	/* 4 Instructions = 4 x 2.5ns = 10ns */
  	__asm__ volatile ("0:
  "
  		"subs %0, %1, #1
  "
  		"bge 0b
  "
  		:"=r" (cyc)
  		:"0"(cyc)
  	);
  }
  
  static struct isp116x_platform_data isp116x_pfm_data = {
  	.remote_wakeup_enable = 1,
  	.delay = isp116x_pfm_delay,
  };
  
  static struct resource isp116x_pfm_resources[] = {
  	[0] =	{
  		.start	= 0x0d000000,
  		.end	= 0x0d000000 + 1,
  		.flags	= IORESOURCE_MEM,
  		},
  	[1] =	{
  		.start  = 0x0d000000 + 4,
  		.end	= 0x0d000000 + 5,
  		.flags  = IORESOURCE_MEM,
  		},
  	[2] =	{
  		.start	= 61,
  		.end	= 61,
  		.flags	= IORESOURCE_IRQ,
  		},
  };
  
  static struct platform_device mp900c_dummy_device = {
  	.name		= "mp900c_dummy",
  	.id		= -1,
  };
  
  static struct platform_device mp900c_usb = {
  	.name		= "isp116x-hcd",
  	.num_resources	= ARRAY_SIZE(isp116x_pfm_resources),
  	.resource	= isp116x_pfm_resources,
  	.dev.platform_data = &isp116x_pfm_data,
  };
  
  static struct platform_device *devices[] __initdata = {
  	&mp900c_dummy_device,
  	&mp900c_usb,
  };
  
  static void __init mp900c_init(void)
  {
  	printk(KERN_INFO "MobilePro 900/C machine init
  ");
  	pxa_set_ffuart_info(NULL);
  	pxa_set_btuart_info(NULL);
  	pxa_set_stuart_info(NULL);
  	platform_add_devices(devices, ARRAY_SIZE(devices));
  }
  
  /* Maintainer - Michael Petchkovsky <mkpetch@internode.on.net> */
  MACHINE_START(NEC_MP900, "MobilePro900/C")
  	.atag_offset	= 0x220100,
  	.init_time	= pxa_timer_init,
  	.map_io		= pxa25x_map_io,
  	.nr_irqs	= PXA_NR_IRQS,
  	.init_irq	= pxa25x_init_irq,
  	.handle_irq	= pxa25x_handle_irq,
  	.init_machine	= mp900c_init,
  	.restart	= pxa_restart,
  MACHINE_END