io_edgeport.c

基于S3CEB2410平台LINUX操作系统下 USB驱动源代码

//
static DIVISOR_TABLE_ENTRY  DivisorTable[] = {
	{   75,		3072},  
	{   110,	2095},		/* 2094.545455 => 230450   => .0217 % over */
	{   134,	1713},		/* 1713.011152 => 230398.5 => .00065% under */
	{   150,	1536},
	{   300,	768},
	{   600,	384},
	{   1200,	192},
	{   1800,	128},
	{   2400,	96},
	{   4800,	48},
	{   7200,	32},
	{   9600,	24},
	{   14400,	16},
	{   19200,	12},
	{   38400,	6},
	{   57600,	4},
	{   115200,	2},
	{   230400,	1},
};

/* local variables */
static int	CmdUrbs = 0;							/* Number of outstanding Command Write Urbs */


/* local function prototypes */

/* function prototypes for all URB callbacks */
static void edge_interrupt_callback	(struct urb *urb);
static void edge_bulk_in_callback	(struct urb *urb);
static void edge_bulk_out_data_callback	(struct urb *urb);
static void edge_bulk_out_cmd_callback	(struct urb *urb);

/* function prototypes for the usbserial callbacks */
static int  edge_open			(struct usb_serial_port *port, struct file *filp);
static void edge_close			(struct usb_serial_port *port, struct file *filp);
static int  edge_write			(struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
static int  edge_write_room		(struct usb_serial_port *port);
static int  edge_chars_in_buffer	(struct usb_serial_port *port);
static void edge_throttle		(struct usb_serial_port *port);
static void edge_unthrottle		(struct usb_serial_port *port);
static void edge_set_termios		(struct usb_serial_port *port, struct termios *old_termios);
static int  edge_ioctl			(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
static void edge_break			(struct usb_serial_port *port, int break_state);
static int  edge_startup		(struct usb_serial *serial);
static void edge_shutdown		(struct usb_serial *serial);


#include "io_tables.h"	/* all of the devices that this driver supports */


/* function prototypes for all of our local functions */
static int  process_rcvd_data		(struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
static void process_rcvd_status		(struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
static void handle_new_msr		(struct edgeport_port *edge_port, __u8 newMsr);
static void handle_new_lsr		(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
static int  send_iosp_ext_cmd		(struct edgeport_port *edge_port, __u8 command, __u8 param);
static int  calc_baud_rate_divisor	(int baud_rate, int *divisor);
static int  send_cmd_write_baud_rate	(struct edgeport_port *edge_port, int baudRate);
static void change_port_settings	(struct edgeport_port *edge_port, struct termios *old_termios);
static int  send_cmd_write_uart_register	(struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
static int  write_cmd_usb		(struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
static void send_more_port_data		(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);

static int  sram_write			(struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
static int  rom_read			(struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
static int  rom_write			(struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
static void get_manufacturing_desc	(struct edgeport_serial *edge_serial);
static void get_boot_desc		(struct edgeport_serial *edge_serial);
static void load_application_firmware	(struct edgeport_serial *edge_serial);


static void unicode_to_ascii		(char *string, short *unicode, int unicode_size);





// ************************************************************************
// ************************************************************************
// ************************************************************************
// ************************************************************************

/************************************************************************
 *									*
 * update_edgeport_E2PROM()	Compare current versions of		*
 *				Boot ROM and Manufacture 		*
 *				Descriptors with versions		*
 *				embedded in this driver			*
 *									*
 ************************************************************************/
static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
{
	__u32 BootCurVer;
	__u32 BootNewVer;
	__u8 BootMajorVersion;                  
	__u8 BootMinorVersion;                  
	__u16 BootBuildNumber;
	__u8 *BootImage;      
	__u32 BootSize;
	PEDGE_FIRMWARE_IMAGE_RECORD record;
	unsigned char *firmware;
	int response;


	switch (edge_serial->product_info.iDownloadFile) {
		case EDGE_DOWNLOAD_FILE_I930:
			BootMajorVersion	= BootCodeImageVersion_GEN1.MajorVersion;
			BootMinorVersion	= BootCodeImageVersion_GEN1.MinorVersion;
			BootBuildNumber		= BootCodeImageVersion_GEN1.BuildNumber;
			BootImage		= &BootCodeImage_GEN1[0];
			BootSize		= sizeof( BootCodeImage_GEN1 );
			break;

		case EDGE_DOWNLOAD_FILE_80251:
			BootMajorVersion	= BootCodeImageVersion_GEN2.MajorVersion;
			BootMinorVersion	= BootCodeImageVersion_GEN2.MinorVersion;
			BootBuildNumber		= BootCodeImageVersion_GEN2.BuildNumber;
			BootImage		= &BootCodeImage_GEN2[0];
			BootSize		= sizeof( BootCodeImage_GEN2 );
			break;

		default:
			return;
	}

	// Check Boot Image Version
	BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
		     (edge_serial->boot_descriptor.MinorVersion << 16) +
		      edge_serial->boot_descriptor.BuildNumber;

	BootNewVer = (BootMajorVersion << 24) +
		     (BootMinorVersion << 16) +
		      BootBuildNumber;

	dbg("Current Boot Image version %d.%d.%d",
	    edge_serial->boot_descriptor.MajorVersion,
	    edge_serial->boot_descriptor.MinorVersion,
	    edge_serial->boot_descriptor.BuildNumber);


	if (BootNewVer > BootCurVer) {
		dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
		    edge_serial->boot_descriptor.MajorVersion,
		    edge_serial->boot_descriptor.MinorVersion,
		    edge_serial->boot_descriptor.BuildNumber,
		    BootMajorVersion,
		    BootMinorVersion,
		    BootBuildNumber);


		dbg("Downloading new Boot Image");

		firmware = BootImage;

		for (;;) {
			record = (PEDGE_FIRMWARE_IMAGE_RECORD)firmware;
			response = rom_write (edge_serial->serial, record->ExtAddr, record->Addr, record->Len, &record->Data[0]);
			if (response < 0) {
				err("sram_write failed (%x, %x, %d)", record->ExtAddr, record->Addr, record->Len);
				break;
			}
			firmware += sizeof (EDGE_FIRMWARE_IMAGE_RECORD) + record->Len;
			if (firmware >= &BootImage[BootSize]) {
				break;
			}
		}
	} else {
		dbg("Boot Image -- already up to date");
	}
}


/************************************************************************
 *									*
 *  Get string descriptor from device					*
 *									*
 ************************************************************************/
static int get_string (struct usb_device *dev, int Id, char *string)
{
	struct usb_string_descriptor StringDesc;
	struct usb_string_descriptor *pStringDesc;

	dbg(__FUNCTION__ " - USB String ID = %d", Id );

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
		return 0;
	}

	pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);

	if (!pStringDesc) {
		return 0;
	}

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
		kfree(pStringDesc);
		return 0;
	}

	unicode_to_ascii(string,  pStringDesc->wData,     pStringDesc->bLength/2-1);

	kfree(pStringDesc);
	return strlen(string);
}


#if 0
/************************************************************************
 *
 *  Get string descriptor from device
 *
 ************************************************************************/
static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
{
	struct usb_string_descriptor StringDesc;
	struct usb_string_descriptor *pStringDesc;

	dbg(__FUNCTION__ " - USB String ID = %d", Id );

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
		return 0;
	}

	pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);

	if (!pStringDesc) {
		return -1;
	}

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
		kfree(pStringDesc);
		return -1;
	}

	*pRetDesc = pStringDesc;
	return 0;
}
#endif

static void get_product_info(struct edgeport_serial *edge_serial)
{
	struct edgeport_product_info *product_info = &edge_serial->product_info;

	memset (product_info, 0, sizeof(struct edgeport_product_info));

	product_info->ProductId		= (__u16)(edge_serial->serial->dev->descriptor.idProduct & ~ION_DEVICE_ID_GENERATION_2);
	product_info->NumPorts		= edge_serial->manuf_descriptor.NumPorts;
	product_info->ProdInfoVer	= 0;

	product_info->RomSize		= edge_serial->manuf_descriptor.RomSize;
	product_info->RamSize		= edge_serial->manuf_descriptor.RamSize;
	product_info->CpuRev		= edge_serial->manuf_descriptor.CpuRev;
	product_info->BoardRev		= edge_serial->manuf_descriptor.BoardRev;

	product_info->BootMajorVersion	= edge_serial->boot_descriptor.MajorVersion;
	product_info->BootMinorVersion	= edge_serial->boot_descriptor.MinorVersion;
	product_info->BootBuildNumber	= edge_serial->boot_descriptor.BuildNumber;

	memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));

	// check if this is 2nd generation hardware
	if (edge_serial->serial->dev->descriptor.idProduct & ION_DEVICE_ID_GENERATION_2) {
		product_info->FirmwareMajorVersion	= OperationalCodeImageVersion_GEN2.MajorVersion;
		product_info->FirmwareMinorVersion	= OperationalCodeImageVersion_GEN2.MinorVersion;
		product_info->FirmwareBuildNumber	= OperationalCodeImageVersion_GEN2.BuildNumber;
		product_info->iDownloadFile		= EDGE_DOWNLOAD_FILE_80251;
	} else {
		product_info->FirmwareMajorVersion	= OperationalCodeImageVersion_GEN1.MajorVersion;
		product_info->FirmwareMinorVersion	= OperationalCodeImageVersion_GEN1.MinorVersion;
		product_info->FirmwareBuildNumber	= OperationalCodeImageVersion_GEN1.BuildNumber;
		product_info->iDownloadFile		= EDGE_DOWNLOAD_FILE_I930;
	}

	// Determine Product type and set appropriate flags
	switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
		case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
		case ION_DEVICE_ID_EDGEPORT_4T:
		case ION_DEVICE_ID_EDGEPORT_4:
		case ION_DEVICE_ID_EDGEPORT_2:
		case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
		case ION_DEVICE_ID_EDGEPORT_8:
		case ION_DEVICE_ID_EDGEPORT_421:
		case ION_DEVICE_ID_EDGEPORT_21:
		case ION_DEVICE_ID_EDGEPORT_2_DIN:
		case ION_DEVICE_ID_EDGEPORT_4_DIN:
		case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
			product_info->IsRS232 = 1;
			break;

		case ION_DEVICE_ID_EDGEPORT_2I:				   // Edgeport/2 RS422/RS485
			product_info->IsRS422 = 1;
			product_info->IsRS485 = 1;
			break;

		case ION_DEVICE_ID_EDGEPORT_8I:				   // Edgeport/4 RS422
		case ION_DEVICE_ID_EDGEPORT_4I:				   // Edgeport/4 RS422
			product_info->IsRS422 = 1;
			break;
	}

	// Dump Product Info structure
	dbg("**Product Information:");
	dbg("  ProductId             %x", product_info->ProductId );
	dbg("  NumPorts              %d", product_info->NumPorts );
	dbg("  ProdInfoVer           %d", product_info->ProdInfoVer );
	dbg("  IsServer              %d", product_info->IsServer);
	dbg("  IsRS232               %d", product_info->IsRS232 );
	dbg("  IsRS422               %d", product_info->IsRS422 );
	dbg("  IsRS485               %d", product_info->IsRS485 );
	dbg("  RomSize               %d", product_info->RomSize );
	dbg("  RamSize               %d", product_info->RamSize );
	dbg("  CpuRev                %x", product_info->CpuRev  );
	dbg("  BoardRev              %x", product_info->BoardRev);
	dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
	    product_info->BootMinorVersion,
	    product_info->BootBuildNumber);
	dbg("  FirmwareMajorVersion  %d.%d.%d", product_info->FirmwareMajorVersion,
	    product_info->FirmwareMinorVersion,
	    product_info->FirmwareBuildNumber);
	dbg("  ManufactureDescDate   %d/%d/%d", product_info->ManufactureDescDate[0],
	    product_info->ManufactureDescDate[1],
	    product_info->ManufactureDescDate[2]+1900);
	dbg("  iDownloadFile         0x%x",     product_info->iDownloadFile);

}


/************************************************************************/
/************************************************************************/
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/************************************************************************/
/************************************************************************/

/*****************************************************************************
 * edge_interrupt_callback
 *	this is the callback function for when we have received data on the 
 *	interrupt endpoint.
 *****************************************************************************/
static void edge_interrupt_callback (struct urb *urb)
{
	struct edgeport_serial	*edge_serial = (struct edgeport_serial *)urb->context;
	struct edgeport_port *edge_port;
	struct usb_serial_port *port;
	unsigned char *data = urb->transfer_buffer;
	int length = urb->actual_length;
	int bytes_avail;
	int position;
	int txCredits;
	int portNumber;
	int result;

	dbg(__FUNCTION__);

	if (serial_paranoia_check (edge_serial->serial, __FUNCTION__)) {
		return;
	}

	if (urb->status) {
		dbg(__FUNCTION__" - nonzero control read status received: %d", urb->status);
		return;
	}

	// process this interrupt-read even if there are no ports open
	if (length) {
		usb_serial_debug_data (__FILE__, __FUNCTION__, length, data);

		if (length > 1) {
			bytes_avail = data[0] | (data[1] << 8);
			if (bytes_avail) {
				edge_serial->rxBytesAvail += bytes_avail;
				dbg(__FUNCTION__" - bytes_avail = %d, rxBytesAvail %d", bytes_avail, edge_serial->rxBytesAvail);

				if ((edge_serial->rxBytesAvail > 0) &&
				    (edge_serial->read_urb->status != -EINPROGRESS)) {
					dbg(" --- Posting a read");

					/* we have pending bytes on the bulk in pipe, send a request */
					edge_serial->read_urb->dev = edge_serial->serial->dev;
					result = usb_submit_urb(edge_serial->read_urb);
					if (result) {
						dbg(__FUNCTION__" - usb_submit_urb(read bulk) failed with result = %d", result);
					}
				}
			}
		}
		/* grab the txcredits for the ports if available */
		position = 2;
		portNumber = 0;
		while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
			txCredits = data[position] | (data[position+1] << 8);
			if (txCredits) {
				port = &edge_serial->serial->port[portNumber];
				if (port_paranoia_check (port, __FUNCTION__) == 0) {
					edge_port = (struct edgeport_port *)port->private;
					if (edge_port->open) {
						edge_port->txCredits += txCredits;
						dbg(__FUNCTION__" - txcredits for port%d = %d", portNumber, edge_port->txCredits);

						/* tell the tty driver that something has changed */
						wake_up_interruptible(&edge_port->port->tty->write_wait);

						// Since we have more credit, check if more data can be sent
						send_more_port_data(edge_serial, edge_port);
					}
				}