usbms_drv.c

mtk 6225平台的usb程序！ 对想了解mtk平台usb的朋友会有帮助！

/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2005
*
*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
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*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
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*****************************************************************************/

/*****************************************************************************
 *
 * Filename:
 * ---------
 *    usbms_drv.c
 *
 * Project:
 * --------
 *   Maui_Software
 *
 * Description:
 * ------------
 *   This file implements usb MASS STORAGE class driver
 *
 * Author:
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 * -------
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 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
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 *============================================================================
 ****************************************************************************/
 
#include "drv_comm.h"
#include "reg_base.h"
#include "intrCtrl.h"
#include "stack_common.h"
#include "stack_msgs.h"
#include "app_ltlcom.h"  
#include "app_buff_alloc.h"
#include "drvsignals.h"

#include "usb_comm.h"
#include "usb_drv.h"
#include "usb.h"
#include "usb_resource.h"

#include "usbms_utils.h"
#include "usbms_drv.h"
#include "usbms_adap.h"
#include "usb_custom.h"


UsbMs_Struct g_UsbMS;

/* static functions */
static void USB_Ms_Rx_DMA_Callback(void);
static void USB_Ms_Tx_DMA_Callback(void);

static void USB_Ms_Ep0_Command(Usb_Ep0_Status *pep0state, Usb_Command *pcmd);
static void USB_Ms_BulkIn_Reset(void);
static void USB_Ms_BulkOut_Reset(void);

static void USB_Ms_Cmd_Reset(void);


/************************************************************
	Tx/Rx path build functions(use DMA)
*************************************************************/

/* prepare to receive Rx packet to addr and length len */
void  USB_Ms_BuildRx(void *addr, kal_uint32 len)
{
	/* stop and ack DMA if previous DMA is not yet ready */
	USB_Stop_DMA_Channel(g_UsbMS.rxpipe->byEP);

	/* initialize rxpipe data */
	g_UsbMS.rxpipe->pData = (kal_uint8 *)addr;
	g_UsbMS.rxpipe->nBytesRecv = 0;
	g_UsbMS.rxpipe->nBuffLen = len;
	//USB_Ms_Dbg_Trace(USB_DBG_BUILDrecREQ, g_UsbMS.rxpipe->nBuffLen);

	/* dma running state is NOT cleared by USB_Ms_Rx_DMA_Callback */
	USB_DMA_Setup(g_UsbMS.rxpipe->byEP, USB_OUT_EP_TYPE, (kal_uint32)addr, len, USB_Ms_Rx_DMA_Callback, KAL_FALSE);
}


/* prepare to transmit Tx packet from addr and length len */	
void  USB_Ms_BuildTx(void *addr, kal_uint32 len)
{
	/* stop and ack DMA if previous DMA is not yet ready */
	USB_Stop_DMA_Channel(g_UsbMS.txpipe->byEP);

	/* initialize tx pipe*/
	g_UsbMS.txpipe->pData = (kal_uint8 *)addr;
	g_UsbMS.txpipe->nBytesLeft = len;

	/* dma running state is NOT cleared by USB_Ms_Tx_DMA_Callback */
	USB_DMA_Setup(g_UsbMS.txpipe->byEP, USB_IN_EP_TYPE, (kal_uint32)addr, len, USB_Ms_Tx_DMA_Callback, KAL_FALSE);
}


/************************************************************
	interface initialization functions
*************************************************************/

/* interface create function, prepare descriptor */
void USB_Ms_If_Create(void *ifname)
{
	kal_uint8 ep_in_id;
	kal_uint8 ep_out_id;
	kal_uint8 if_id;

	/* get resource number and register to gUsbDevice */
	g_UsbMS.ms_if_info = USB_Get_Interface_Number(&if_id);
	g_UsbMS.ms_ep_in_info = USB_Get_BulkIn_Ep(&ep_in_id);
	g_UsbMS.ms_ep_out_info = USB_Get_BulkOut_Ep(&ep_out_id);

	/* record interface name and interface descriptor length */
	g_UsbMS.ms_if_info->interface_name_ptr = (kal_char *)ifname;
	g_UsbMS.ms_if_info->ifdscr_size = USB_IFDSC_LENGTH;
	g_UsbMS.ms_ep_in_info->epdscr_size = USB_EPDSC_LENGTH;
	g_UsbMS.ms_ep_out_info->epdscr_size = USB_EPDSC_LENGTH;

	/* related endpoint info and class specific command handler*/
	g_UsbMS.ms_if_info->ep_info[0] = g_UsbMS.ms_ep_in_info;
	g_UsbMS.ms_if_info->ep_info[1] = (Usb_Ep_Info*)g_UsbMS.ms_ep_out_info;
	g_UsbMS.ms_if_info->if_class_specific_hdlr = USB_Ms_Ep0_Command;

	/* standard interface descriptor */
	g_UsbMS.ms_if_info->ifdscr.stdif.bLength = USB_IFDSC_LENGTH;
	g_UsbMS.ms_if_info->ifdscr.stdif.bDescriptorType = USB_INTERFACE;
	g_UsbMS.ms_if_info->ifdscr.stdif.bInterfaceNumber = if_id;
	g_UsbMS.ms_if_info->ifdscr.stdif.bAlternateSetting = 0;
	g_UsbMS.ms_if_info->ifdscr.stdif.bNumEndpoints = USB_MS_EP_NUMBER;
	g_UsbMS.ms_if_info->ifdscr.stdif.bInterfaceClass = USB_MS_INTERFACE_CLASS_CODE;
	g_UsbMS.ms_if_info->ifdscr.stdif.bInterfaceSubClass = USB_MS_INTERFACE_SUBCLASS_CODE;
	g_UsbMS.ms_if_info->ifdscr.stdif.bInterfaceProtocol = USB_MS_INTERFACE_PROTOCOL_CODE;
	g_UsbMS.ms_if_info->ifdscr.stdif.iInterface = USB_Get_String_Number((void *)g_UsbMS.ms_param->interface_string); 

	/* endpoint handler */
	USB_Register_Drv_Info(USB_DRV_HDLR_EP_IN, ep_in_id, NULL);
	g_UsbMS.ms_ep_in_info->ep_reset = USB_Ms_BulkIn_Reset;
	USB_Register_Drv_Info(USB_DRV_HDLR_EP_OUT, ep_out_id, NULL);
	g_UsbMS.ms_ep_out_info->ep_reset = USB_Ms_BulkOut_Reset;
	/* endpoint descriptor */
	g_UsbMS.ms_ep_in_info->epdesc.stdep.bLength = USB_EPDSC_LENGTH;