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uClinux2.4.x+S3C4501B平台的USB-HOST驱动设计

/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*
 *
 *      邵仕泉 张红雨  修改的811驱动程序
 *
 * SL811HS USB HCD for Linux Version 0.1 (10/28/2001)
 * 
 * requires (includes) hc_simple.[hc] simple generic HCD frontend
 *  
 * COPYRIGHT(C) 2001 by CYPRESS SEMICONDUCTOR INC.
 *
 *-------------------------------------------------------------------------*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *-------------------------------------------------------------------------*/

#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/list.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/irq.h>

#include <linux/usb.h>
#include "hcd.h"

#undef HC_URB_TIMEOUT
#undef HC_SWITCH_INT
#undef HC_ENABLE_ISOC

#define SL811_DEBUG_ERR

#ifdef SL811_DEBUG_ERR
#define DBGERR(fmt, args...) printk(fmt,## args)
#else
#define DBGERR(fmt, args...)
#endif

#ifdef SL811_DEBUG
#define DBG(fmt, args...) printk(fmt,## args)
#else
#define DBG(fmt, args...)
#endif

#ifdef SL811_DEBUG_FUNC
#define DBGFUNC(fmt, args...) printk(fmt,## args)
#else
#define DBGFUNC(fmt, args...)
#endif

#ifdef SL811_DEBUG_DATA
#define DBGDATAR(fmt, args...) printk(fmt,## args)
#define DBGDATAW(fmt, args...) printk(fmt,## args)
#else
#define DBGDATAR(fmt, args...)
#define DBGDATAW(fmt, args...)
#endif

#ifdef SL811_DEBUG_VERBOSE
#define DBGVERBOSE(fmt, args...) printk(fmt,## args)
#else
#define DBGVERBOSE(fmt, args...)
#endif

#define TRUE 1
#define FALSE 0

#define HC_SWITCH_INT
#include "hc_sl811.h"
#include "hc_simple.h"

static int urb_debug = 0;

#include "hc_simple.c"
#include "hc_sl811_rh.c"

/* forware declaration */

int SL11StartXaction (hci_t * hci, __u8 addr, __u8 epaddr, int pid, int len,
		      int toggle, int slow, int urb_state);

static int sofWaitCnt = 0;

#ifndef CONFIG_USB_SL811HC_AUTO
/* The base_addr, data_reg_addr, and irq number are board specific.
 * The current values are design to run on the Accelent SA1110 IDP
 * NOTE: values need to modify for different development boards 
 */

static int base_addr = 0x1200000;
static int data_reg_addr = 0x1200400;
static int irq = 0;

MODULE_PARM (urb_debug, "i");
MODULE_PARM_DESC (urb_debug, "debug urb messages, default is 0 (no)");

MODULE_PARM (base_addr, "i");
MODULE_PARM_DESC (base_addr, "sl811 base address 0xd3800000");
MODULE_PARM (data_reg_addr, "i");
MODULE_PARM_DESC (data_reg_addr, "sl811 data register address 0xd3810000");
MODULE_PARM (irq, "i");
MODULE_PARM_DESC (irq, "IRQ 34 (default)");

#else
/*
 * Brave soul,
 * ask for heaven's protection!
 */
/* 
 * Our board has this controller attached to CS2 with address 0xc0000000
 */


#define SL811HC_IOPORT0 0x1200000
#define SL811HC_IODATAPORT0 0x1200400
#define SL811HC_IOPORT1 0x1200000
#define SL811HC_IODATAPORT1 0x1200400
#define SL811HC_IOPORT2 0x1200000
#define SL811HC_IODATAPORT2 0x1200400
#define SL811HC_IOPORT3 0x1200000
#define SL811HC_IODATAPORT3 0x1200400

#define SL811HC_IRQ0 0
#define SL811HC_IRQ1 0
#define SL811HC_IRQ2 0
#define SL811HC_IRQ3 0

int sl811hc_portlist[] = { SL811HC_IOPORT0, SL811HC_IOPORT1, SL811HC_IOPORT2, SL811HC_IOPORT3, 0 };
int sl811hc_datalist[] = { SL811HC_IODATAPORT0, SL811HC_IODATAPORT1, SL811HC_IODATAPORT2, SL811HC_IODATAPORT3, 0 };
int sl811hc_irqlist[] = { SL811HC_IRQ0, SL811HC_IRQ1, SL811HC_IRQ2, SL811HC_IRQ3, 0 };

MODULE_PARM(sl811hc_portlist,"i");
MODULE_PARM_DESC(base_addr,"sl811hc base address (0xc0000000 default)");
MODULE_PARM(data_reg_addr,"i");
MODULE_PARM_DESC(data_reg_addr,"sl811hc data register address (0xc0010000 default)");
MODULE_PARM(irq,"i");
MODULE_PARM_DESC(irq,"IRQ 27 (default)");

#endif /* CONFIG_USB_SL811HC_AUTO */

static int hc_reset (hci_t * hci);

/***************************************************************************
 * Function Name : SL811Read
 *
 * Read a byte of data from the SL811H/SL11H
 *
 * Input:  hci = data structure for the host controller
 *         offset = address of SL811/SL11H register or memory
 *
 * Return: data 
 **************************************************************************/
char SL811Read (hci_t * hci, char offset)
{
	hcipriv_t *hp = &hci->hp;
	char data;
	writeb (offset, hp->hcport);
	wmb ();
	data = readb (hp->hcport2);
	rmb ();
	return (data);
}

/***************************************************************************
 * Function Name : SL811Write
 *
 * Write a byte of data to the SL811H/SL11H
 *
 * Input:  hci = data structure for the host controller
 *         offset = address of SL811/SL11H register or memory
 *         data  = the data going to write to SL811H
 *
 * Return: none 
 **************************************************************************/
void SL811Write (hci_t * hci, char offset, char data)
{
	hcipriv_t *hp = &hci->hp;
	writeb (offset, hp->hcport);
	writeb (data, hp->hcport2);
	wmb ();
}

/***************************************************************************
 * Function Name : SL811BufRead
 *
 * Read consecutive bytes of data from the SL811H/SL11H buffer
 *
 * Input:  hci = data structure for the host controller
 *         offset = SL811/SL11H register offset
 *         buf = the buffer where the data will store
 *         size = number of bytes to read
 *
 * Return: none 
 **************************************************************************/
void SL811BufRead (hci_t * hci, short offset, char *buf, short size)
{
	hcipriv_t *hp = &hci->hp;
	if (size <= 0)
		return;
	writeb ((char) offset, hp->hcport);
	wmb ();
	DBGDATAR ("SL811BufRead: offset = 0x%x, data = ", offset);
	while (size--) {
		*buf++ = (char) readb (hp->hcport2);
		DBGDATAR ("0x%x ", *(buf - 1));
		rmb ();
	}
	DBGDATAR ("\n");
}

/***************************************************************************
 * Function Name : SL811BufWrite
 *
 * Write consecutive bytes of data to the SL811H/SL11H buffer
 *
 * Input:  hci = data structure for the host controller
 *         offset = SL811/SL11H register offset
 *         buf = the data buffer 
 *         size = number of bytes to write
 *
 * Return: none 
 **************************************************************************/
void SL811BufWrite (hci_t * hci, short offset, char *buf, short size)
{
	hcipriv_t *hp = &hci->hp;
	if (size <= 0)
		return;
	writeb ((char) offset, hp->hcport);
	wmb ();
	DBGDATAW ("SL811BufWrite: offset = 0x%x, data = ", offset);
	while (size--) {
		DBGDATAW ("0x%x ", *buf);
		writeb (*buf, hp->hcport2);
		wmb ();
		buf++;
	}
	DBGDATAW ("\n");
}

/***************************************************************************
 * Function Name : regTest
 *
 * This routine test the Read/Write functionality of SL811HS registers  
 *
 * 1) Store original register value into a buffer
 * 2) Write to registers with a RAMP pattern. (10, 11, 12, ..., 255)
 * 3) Read from register
 * 4) Compare the written value with the read value and make sure they are 
 *    equivalent
 * 5) Restore the original register value 
 *
 * Input:  hci = data structure for the host controller
 *   
 *
 * Return: TRUE = passed; FALSE = failed 
 **************************************************************************/
int regTest (hci_t * hci)
{
	int i, data, result = TRUE;
	char buf[256];

	DBGFUNC ("Enter regTest\n");
	for (i = 0x10; i < 256; i++) {
		/* save the original buffer */
		buf[i] = (char) SL811Read (hci, i);

		/* Write the new data to the buffer */
		SL811Write (hci, i, i);
	}

	/* compare the written data */
	for (i = 0x10; i < 256; i++) {
		data = SL811Read (hci, i);
		if (data != i) {
			DBGERR ("Pattern test failed!! value = 0x%x, s/b 0x%x\n",
				data, i);
			result = FALSE;
		}
	}

	if(result!=FALSE)
DBGERR ("GOOD LUCK,Pattern test PASSED!! ");
	/* restore the data */
	for (i = 0x10; i < 256; i++) {
		SL811Write (hci, i, buf[i]);
	}

	return (result);
}

/***************************************************************************
 * Function Name : regShow
 *
 * Display all SL811HS register values
 *
 * Input:  hci = data structure for the host controller
 *
 * Return: none 
 **************************************************************************/
void regShow (hci_t * hci)
{
	int i;
	for (i = 0; i < 256; i++) {
		printk ("offset %d: 0x%x\n", i, SL811Read (hci, i));
	}
}

/************************************************************************
 * Function Name : USBReset
 *  
 * This function resets SL811HS controller and detects the speed of
 * the connecting device				  
 *
 * Input:  hci = data structure for the host controller
 *                
 * Return: 0 = no device attached; 1 = USB device attached
 *                
 ***********************************************************************/
static int USBReset (hci_t * hci)
{
	int status;
	hcipriv_t *hp = &hci->hp;

	DBGFUNC ("enter USBReset\n");

	SL811Write (hci, SL11H_CTLREG2, 0xae);

	// setup master and full speed

	SL811Write (hci, SL11H_CTLREG1, 0x08);	// reset USB
	mdelay (20);		// 20ms                             
	SL811Write (hci, SL11H_CTLREG1, 0);	// remove SE0        

	for (status = 0; status < 100; status++)
		SL811Write (hci, SL11H_INTSTATREG, 0xff);	// clear all interrupt bits

	status = SL811Read (hci, SL11H_INTSTATREG);

	if (status & 0x40)	// Check if device is removed
	{
		DBG ("USBReset: Device removed\n");
		SL811Write (hci, SL11H_INTENBLREG,
			    SL11H_INTMASK_XFERDONE | SL11H_INTMASK_SOFINTR |
			    SL11H_INTMASK_INSRMV);
		hp->RHportStatus->portStatus &=
		    ~(PORT_CONNECT_STAT | PORT_ENABLE_STAT);

		return 0;
	}

	SL811Write (hci, SL11H_BUFLNTHREG_B, 0);	//zero lenth
	SL811Write (hci, SL11H_PIDEPREG_B, 0x50);	//send SOF to EP0       
	SL811Write (hci, SL11H_DEVADDRREG_B, 0x01);	//address0
	SL811Write (hci, SL11H_SOFLOWREG, 0xe0);

	if (!(status & 0x80)) {
		/* slow speed device connect directly to root-hub */

		DBG ("USBReset: low speed Device attached\n");
		SL811Write (hci, SL11H_CTLREG1, 0x8);
		mdelay (20);
		SL811Write (hci, SL11H_SOFTMRREG, 0xee);
		SL811Write (hci, SL11H_CTLREG1, 0x21);

		/* start the SOF or EOP */

		SL811Write (hci, SL11H_HOSTCTLREG_B, 0x01);
		hp->RHportStatus->portStatus |=
		    (PORT_CONNECT_STAT | PORT_LOW_SPEED_DEV_ATTACH_STAT);

		/* clear all interrupt bits */

		for (status = 0; status < 20; status++)
			SL811Write (hci, SL11H_INTSTATREG, 0xff);
	} else {
		/* full speed device connect directly to root hub */

		DBG ("USBReset: full speed Device attached\n");
		SL811Write (hci, SL11H_CTLREG1, 0x8);
		mdelay (20);
		SL811Write (hci, SL11H_SOFTMRREG, 0xae);
		SL811Write (hci, SL11H_CTLREG1, 0x01);

		/* start the SOF or EOP */

		SL811Write (hci, SL11H_HOSTCTLREG_B, 0x01);
		hp->RHportStatus->portStatus |= (PORT_CONNECT_STAT);
		hp->RHportStatus->portStatus &= ~PORT_LOW_SPEED_DEV_ATTACH_STAT;

		/* clear all interrupt bits */

		SL811Write (hci, SL11H_INTSTATREG, 0xff);

	}

	/* enable all interrupts */
	SL811Write (hci, SL11H_INTENBLREG,
		    SL11H_INTMASK_XFERDONE | SL11H_INTMASK_SOFINTR |
		    SL11H_INTMASK_INSRMV);

	return 1;
}

/*-------------------------------------------------------------------------*/
/* tl functions */
static inline void hc_mark_last_trans (hci_t * hci)
{
	hcipriv_t *hp = &hci->hp;
	__u8 *ptd = hp->tl;

	dbg ("enter hc_mark_last_trans\n");
	if (ptd == NULL) {
		printk ("hc_mark_last_trans: ptd = null\n");
		return;
	}
	if (hp->xferPktLen > 0)
		*(ptd + hp->tl_last) |= (1 << 3);
}

static inline void hc_flush_data_cache (hci_t * hci, void *data, int len)
{
}

/************************************************************************
 * Function Name : hc_add_trans
 *  
 * This function sets up the SL811HS register and transmit the USB packets.
 * 
 * 1) Determine if enough time within the current frame to send the packet
 * 2) Load the data into the SL811HS register
 * 3) Set the appropriate command to the register and trigger the transmit
 *
 * Input:  hci = data structure for the host controller
 *         len = data length
 *         data = transmitting data
 *         toggle = USB toggle bit, either 0 or 1
 *         maxps = maximum packet size for this endpoint
 *         slow = speed of the device
 *         endpoint = endpoint number
 *         address = USB address of the device
 *         pid = packet ID
 *         format = 
 *         urb_state = the current stage of USB transaction
 *       
 * Return: 0 = no time left to schedule the transfer
 *         1 = success 
 *                
 ***********************************************************************/
static inline int hc_add_trans (hci_t * hci, int len, void *data, int toggle,
				int maxps, int slow, int endpoint, int address,
				int pid, int format, int urb_state)
{
	hcipriv_t *hp = &hci->hp;
	__u16 speed;