usb-ohci-s3c2410.c

周立功magic2410实验箱源码 第6章Linux高级实验(part2) 6.9 IDE硬盘实验. 6.10 USB主机驱动编译与加载实验 6.11 U盘驱动程序编译与使用实验 6.12

/*
 *  linux/drivers/usb/usb-ohci-s3c2410.c
 *
 *  OHCI r1.0 compatible, CPU embedded USB host controller
 *
 *  2003-09-03 kwanghyun la<[e-mail]>
 *  	- to get the USB CLOCK setting value & set register for s3c2410
 */
 #ifndef __KERNEL__
    #define __KERNEL__
#endif
#ifndef MODULE
    #define MODULE
#endif

//#include <linux/sched.h>
//#include <linux/kernel.h>       /* printk() */
//#include <linux/init.h>

#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/pci.h>

#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>

#define OHCI_HW_DRIVER 1
#include "usb-ohci.h"

int __devinit
hc_add_ohci(struct pci_dev *dev, int irq, void *membase, unsigned long flags,
	    ohci_t **ohci, const char *name, const char *slot_name);
extern void hc_remove_ohci(ohci_t *ohci);

static ohci_t *s3c2410_ohci;				// 定一个控制器设备结构体指针


/*********************************************************************************************************
** Function name: s3c2410_ohci_configure
** Descriptions:
** Input:A:
**       B：
**       C：
** Output 0:
**        1:
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void __init s3c2410_ohci_configure(void)
{
#if CONFIG_MAX_ROOT_PORTS < 2
	/* 1 host port, 1 slave port*/
	MISCCR &= ~MISCCR_USBPAD;

#else
	/* 2 host port */
	MISCCR |= MISCCR_USBPAD;


#endif

	/* UPLLCON */
// laputa for USB PLL setting value chaged input 12MHz --> output 48MHz 	
	UPLLCON = FInsrt(0x38, fPLL_MDIV) | FInsrt(0x02, fPLL_PDIV) 
		| FInsrt(0x02, fPLL_SDIV);

	/* CLKCON */
	CLKCON  |= CLKCON_USBH;

	//laputa append begine -->
//	CLKSLOW &= ~(UCLK_ON | MPLL_OFF | SLOW_BIT); 
	//laputa append end <--
	


	udelay(11);
}

/*********************************************************************************************************
** Function name: Fuction1
** Descriptions:
** Input:A:
**       B：
**       C：
** Output 0:
**        1:
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static int __init s3c2410_ohci_init(void)
{
	int ret;

	s3c2410_ohci_configure();

	/*
	 * Initialise the generic OHCI driver.
	 */
	// FIXME : io_p2v() ?
	ret = hc_add_ohci((struct pci_dev *)1, 
										IRQ_USBH,
			  (void *)(io_p2v(USBHOST_CTL_BASE)), 		// USB主机控制器基地址
			  0, 																			//
			  &s3c2410_ohci,													//
			  "usb-ohci", 
			  "s3c2410");

	return ret;
}

/*********************************************************************************************************
** Function name: s3c2410_ohci_exit
** Descriptions: 
** Input:A:
**       B：
**       C：
** Output 0:
**        1:
** Created by:
** Created Date: 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static void __exit s3c2410_ohci_exit(void)
{
	hc_remove_ohci(s3c2410_ohci);							// 

	/*
	 * Stop the USB clock.
	 */
	CLKCON &= ~CLKCON_USBH;
}

module_init(s3c2410_ohci_init);
module_exit(s3c2410_ohci_exit);