📄 usbdev.c
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}
/*********************************************************************************************************
** Function name: usbdev_open
** Descriptions : open device
** Input : inode : information of device
** filp : pointer of file
** Output : 0 : OK
** other : not OK
** Created by : MingYuan Zheng
** Created Date : 2005-12-26
**------------- ------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
static int usbdev_open(struct inode *inode, struct file *filp)
{
unsigned long flag;
unsigned int num;
INT32U i;
/* get the device minor and save into filp structure */
num = MINOR(inode->i_rdev);
filp->private_data = (void *)num; /* 取得次设备号并保存在filp结构中 */
if (usage == 0)
{
/* disable interrupt */
local_irq_save(flag);
/* initialize global variable */
for (i = 0; i < NUMS_REC_ENDPOINTS; i++)
{
sema_init(&rec_sem[i], 1); /* 接收端点信号量 */
sema_init(&rec_irq_sem[i], 0); /* 接收端点中断信号量 */
sema_init(&send_sem[i], 1); /* 发送端点信号量 */
sema_init(&send_irq_sem[i], 0); /* 发送端点中断信号量 */
init_waitqueue_head(&rec_queue[i]); /* 接收数据等待队列 */
init_waitqueue_head(&send_queue[i]); /* 发送数据等待队列 */
rec_timeout[i] = 0; /* 超时时间置为0 */
send_timeout[i] = 0;
b_send[i] = 0; /* 已发送标志置为0 */
b_rec[i] = 0; /* 已接收标志置为0 */
}
/* enable interrupt */
local_irq_restore(flag);
}
usage++;
MOD_INC_USE_COUNT; /* increase the number of opened driver */
return 0; /* success */
}
/*********************************************************************************************************
** Function name: usbdev_init
** Descriptions : init driver
** Input : none
** Output : 0: OK
** other: not OK
** Created by : MingYuan Zheng
** Created Date : 2005-12-26
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
int usbdev_init(void)
{
int result;
/* register the device */
result = register_chrdev(MAJOR_NR, DEVICE_NAME, &usbdev_fops); /* 注册设备 */
if (result < 0)
{
printk(KERN_ERR DEVICE_NAME ": Unable to get major %d\n", MAJOR_NR );
return(result);
}
/* Initialize the USB device controller */
USB_Initialize(); /* 初始化 USB 设备控制器 */
/* register the interrupt handler*/
request_irq(IRQ_USBD, usb_irq_handle, SA_INTERRUPT, "my" DEVICE_NAME, NULL);
/* clear usb device interrupt and enable usb interrupt */
SRCPND = INT_USBD; /* 清除USB中断并使能USB中断 */
INTPND = INT_USBD;
INTMSK &= ~(INT_USBD);
if (MAJOR_NR == 0)
{
MAJOR_NR = result; /* dynamic */
}
printk(KERN_INFO DEVICE_NAME ": init OK\n");
return(0);
}
/*********************************************************************************************************
** Function name: usbdev_cleanup
** Descriptions : unload driver
** Input : none
** Output : none
** Created by : MingYuan Zheng
** Created Date : 2005-12-26
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void usbdev_cleanup(void)
{
printk("Unloading S3C2410 USB Device Controller Driver\n");
CLKCON &= ~CLKCON_USBD; /* 关闭 USB 设备控制器时钟 close the clock of the USB device controller */
free_irq(IRQ_USBD, NULL); /* 释放 USB 中断号 release the USB interrupt */
USB_DISCONNCET(); /* 断开 USB 总线连接 disconnect the USB bus */
unregister_chrdev(MAJOR_NR, DEVICE_NAME);
}
module_init(usbdev_init);
module_exit(usbdev_cleanup);
/*******************************************************************
下面内容与 Linux 操作系统无关
********************************************************************/
/* define USB event flag variable */
EPPFLAGS bEPPflags; /* 定义 USB 事件标志变量 */
/*********************************************************************************************************
** Function name : USB_Initialize
** Descriptions : Initialize the USB device controller 初始化USB设备控制器
** Input : NULL
** Output : 0: Initialize sucessfully 1: Initialize fail 0: 初始化成功 1: 初始化失败
** Created by : MingYuan Zheng 郑明远
** Created Date : 2006-01-12
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U USB_Initialize(void)
{
bEPPflags.value = 0;
USB_InitHareware(); /* 初始化硬件 Initialize hardware */
USB_InitSFR(); /* 初始化相关寄存器 Initialize the related register */
USB_ConfigEndpoint(); /* 配置所有端点 Config all the endpoint */
USB_SetAddressEnable(0, 1); /* 设置默认地址为0 Config the default address is 0 */
USB_Reconnect();
return 0; /* 初始化USB成功 Initialize USB sucessfully */
}
/*********************************************************************************************************
** Function name : USB_InitSFR
** Descriptions : Initialize the SFR of USB Device Contoller
初始化USB设备控制器相关寄存器
** Input : NULL
** Output : NULL
** Created by : MingYuan Zheng 郑明远
** Created Date : 2006-01-12
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void USB_InitSFR(void)
{
INT32U tmp;
UD_PWR = DISABLE_SUSPEND; /* 禁止挂起模式 disable suspend mode */
tmp = UD_INT;
UD_INT = tmp;
/* 清除USB控制器所有中断 clear all interrupt of USB Device */
tmp = UD_USBINT;
UD_USBINT = tmp;
/* 使能 EP0 ~ EP4 和 复位中断 Enable interrupt of EP0 ~ EP4 and reset interrupt */
USB_InterruptEnable(EP0_INT | EP1_INT | EP2_INT | EP3_INT | EP4_INT, RESET_INT);
}
/*********************************************************************************************************
** Function name : USB_ConfigEndpoint
** Descriptions : config all endpoint
配置所有端点
** Input : NULL
** Output : NULL
** Created by : MingYuan Zheng 郑明远
** Created Date : 2006-01-12
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void USB_ConfigEndpoint(void)
{
USB_ConfigMaxPaketSize(0, FIFO_SIZE_16); /* 端点 0 最大包长度为16 Endpoint 0 Max packet is 16 */
USB_ConfigMaxPaketSize(1, FIFO_SIZE_64); /* 端点 1 最大包长度为64 Endpoint 1 Max packet is 64 */
USB_ConfigMaxPaketSize(2, FIFO_SIZE_64); /* 端点 2 最大包长度为64 Endpoint 2 Max packet is 64 */
USB_ConfigMaxPaketSize(3, FIFO_SIZE_64); /* 端点 3 最大包长度为64 Endpoint 3 Max packet is 64 */
USB_ConfigMaxPaketSize(4, FIFO_SIZE_64); /* 端点 4 最大包长度为64 Endpoint 4 Max packet is 64 */
/* Configure endpoint 0 */
USB_SetCurEndpoint(0);
UD_ICSR1 = EP0_SERVICED_OUT_PKT_RDY | EP0_SERVICED_SETUP_END; /* 配置端点0: 清除相关标志 */
/* Endpoint 1: IN, Bulk transfer, disble DMA */
USB_ConfigEpControlStatus(1, EPI_MODE_IN, EPI_BULK, EPO_BULK); /* 配置端点1: IN 端点, 批量传输, 禁止DMA中断 */
/* Endpoint 2: OUT, Bulk transfer, disble DMA */
USB_ConfigEpControlStatus(2, EPI_MODE_OUT, EPI_BULK, EPO_BULK); /* 配置端点2: OUT 端点, 批量传输, 禁止DMA中断 */
/* Endpoint 3: IN, Bulk transfer, disble DMA */
USB_ConfigEpControlStatus(3, EPI_MODE_IN, EPI_BULK, EPO_BULK); /* 配置端点3: IN 端点, 批量传输, 禁止DMA中断 */
/* Endpoint 4: OUT, Bulk transfer, disble DMA */
USB_ConfigEpControlStatus(4, EPI_MODE_OUT, EPI_BULK, EPO_BULK); /* 配置端点4: OUT 端点, 批量传输, 禁止DMA中断 */
}
/*********************************************************************************************************
** Function name : USB_BusReset
** Descriptions : process USB bus reset
USB 总线复位处理
** Input : NULL
** Output : NULL
** Created by : MingYuan Zheng 郑明远
** Created Date : 2006-01-12
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void USB_BusReset(void)
{
USB_InitHareware();
USB_InitSFR(); /* 初始化相关寄存器 Initialize the related register */
USB_ConfigEndpoint(); /* 配置所有端点 Config all the endpoint */
USB_SetAddressEnable(0, 1); /* 设置默认地址为0 Config the default address is 0 */
UD_USBINT = RESET_INT; /* 清除USB中断 */
}
/*********************************************************************************************************
** Function name : USB_Suspend
** Descriptions : process USB bus suspend
USB 总线挂起
** Input : NULL
** Output : NULL
** Created by : MingYuan Zheng 郑明远
** Created Date : 2006-01-12
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void USB_Suspend(void)
{
UD_USBINT = SUSPEND_INT;
}
/*********************************************************************************************************
** End Of File
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