mos7720.c 41.5 KB
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/*
 * mos7720.c
 *   Controls the Moschip 7720 usb to dual port serial convertor
 *
 * Copyright 2006 Moschip Semiconductor Tech. Ltd.
 *
 * 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, version 2 of the License.
 *
 * Developed by:
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 * 	Vijaya Kumar <vijaykumar.gn@gmail.com>
 *	Ajay Kumar <naanuajay@yahoo.com>
 *	Gurudeva <ngurudeva@yahoo.com>
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 *
 * Cleaned up from the original by:
 *	Greg Kroah-Hartman <gregkh@suse.de>
 *
 * Originally based on drivers/usb/serial/io_edgeport.c which is:
 *	Copyright (C) 2000 Inside Out Networks, All rights reserved.
 *	Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
 */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <asm/uaccess.h>


/*
 * Version Information
 */
#define DRIVER_VERSION "1.0.0.4F"
#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
#define DRIVER_DESC "Moschip USB Serial Driver"

/* default urb timeout */
#define MOS_WDR_TIMEOUT	(HZ * 5)

#define MOS_PORT1	0x0200
#define MOS_PORT2	0x0300
#define MOS_VENREG	0x0000
#define MOS_MAX_PORT	0x02
#define MOS_WRITE	0x0E
#define MOS_READ	0x0D

/* Interrupt Rotinue Defines	*/
#define SERIAL_IIR_RLS	0x06
#define SERIAL_IIR_RDA	0x04
#define SERIAL_IIR_CTI	0x0c
#define SERIAL_IIR_THR	0x02
#define SERIAL_IIR_MS	0x00

#define NUM_URBS			16	/* URB Count */
#define URB_TRANSFER_BUFFER_SIZE	32	/* URB Size */

/* This structure holds all of the local port information */
struct moschip_port
{
	__u8	shadowLCR;		/* last LCR value received */
	__u8	shadowMCR;		/* last MCR value received */
	__u8	shadowMSR;		/* last MSR value received */
	char			open;
	struct async_icount	icount;
	struct usb_serial_port	*port;	/* loop back to the owner */
	struct urb		*write_urb_pool[NUM_URBS];
};

/* This structure holds all of the individual serial device information */
struct moschip_serial
{
	int interrupt_started;
};

static int debug;

#define USB_VENDOR_ID_MOSCHIP		0x9710
#define MOSCHIP_DEVICE_ID_7720		0x7720
#define MOSCHIP_DEVICE_ID_7715		0x7715

static struct usb_device_id moschip_port_id_table [] = {
	{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
	{ } /* terminating entry */
};
MODULE_DEVICE_TABLE(usb, moschip_port_id_table);


/*
 * mos7720_interrupt_callback
 *	this is the callback function for when we have received data on the
 *	interrupt endpoint.
 */
static void mos7720_interrupt_callback(struct urb *urb)
{
	int result;
	int length;
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	int status = urb->status;
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	__u8 *data;
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	__u8 sp1;
	__u8 sp2;

	dbg("%s"," : Entering\n");

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	switch (status) {
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	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
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		dbg("%s - urb shutting down with status: %d", __func__,
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		    status);
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		return;
	default:
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		dbg("%s - nonzero urb status received: %d", __func__,
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		    status);
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		goto exit;
	}

	length = urb->actual_length;
	data = urb->transfer_buffer;

	/* Moschip get 4 bytes
	 * Byte 1 IIR Port 1 (port.number is 0)
	 * Byte 2 IIR Port 2 (port.number is 1)
	 * Byte 3 --------------
	 * Byte 4 FIFO status for both */
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	/* the above description is inverted
	 * 	oneukum 2007-03-14 */

	if (unlikely(length != 4)) {
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		dbg("Wrong data !!!");
		return;
	}

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	sp1 = data[3];
	sp2 = data[2];
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	if ((sp1 | sp2) & 0x01) {
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		/* No Interrupt Pending in both the ports */
		dbg("No Interrupt !!!");
	} else {
		switch (sp1 & 0x0f) {
		case SERIAL_IIR_RLS:
			dbg("Serial Port 1: Receiver status error or address "
			    "bit detected in 9-bit mode\n");
			break;
		case SERIAL_IIR_CTI:
			dbg("Serial Port 1: Receiver time out");
			break;
		case SERIAL_IIR_MS:
			dbg("Serial Port 1: Modem status change");
			break;
		}

		switch (sp2 & 0x0f) {
		case SERIAL_IIR_RLS:
			dbg("Serial Port 2: Receiver status error or address "
			    "bit detected in 9-bit mode");
			break;
		case SERIAL_IIR_CTI:
			dbg("Serial Port 2: Receiver time out");
			break;
		case SERIAL_IIR_MS:
			dbg("Serial Port 2: Modem status change");
			break;
		}
	}

exit:
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_err(&urb->dev->dev,
			"%s - Error %d submitting control urb\n",
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			__func__, result);
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	return;
}

/*
 * mos7720_bulk_in_callback
 *	this is the callback function for when we have received data on the
 *	bulk in endpoint.
 */
static void mos7720_bulk_in_callback(struct urb *urb)
{
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	int retval;
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	unsigned char *data ;
	struct usb_serial_port *port;
	struct moschip_port *mos7720_port;
	struct tty_struct *tty;
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	int status = urb->status;
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	if (status) {
		dbg("nonzero read bulk status received: %d", status);
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		return;
	}

	mos7720_port = urb->context;
	if (!mos7720_port) {
		dbg("%s","NULL mos7720_port pointer \n");
		return ;
	}

	port = mos7720_port->port;

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	dbg("Entering...%s", __func__);
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	data = urb->transfer_buffer;

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	tty = port->port.tty;
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	if (tty && urb->actual_length) {
		tty_buffer_request_room(tty, urb->actual_length);
		tty_insert_flip_string(tty, data, urb->actual_length);
		tty_flip_buffer_push(tty);
	}

	if (!port->read_urb) {
		dbg("URB KILLED !!!");
		return;
	}

	if (port->read_urb->status != -EINPROGRESS) {
		port->read_urb->dev = port->serial->dev;

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		retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
		if (retval)
			dbg("usb_submit_urb(read bulk) failed, retval = %d",
			    retval);
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	}
}

/*
 * mos7720_bulk_out_data_callback
 *	this is the callback function for when we have finished sending serial
 *	data on the bulk out endpoint.
 */
static void mos7720_bulk_out_data_callback(struct urb *urb)
{
	struct moschip_port *mos7720_port;
	struct tty_struct *tty;
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	int status = urb->status;
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	if (status) {
		dbg("nonzero write bulk status received:%d", status);
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		return;
	}

	mos7720_port = urb->context;
	if (!mos7720_port) {
		dbg("NULL mos7720_port pointer");
		return ;
	}

	dbg("Entering .........");

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	tty = mos7720_port->port->port.tty;
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	if (tty && mos7720_port->open)
		tty_wakeup(tty);
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}

/*
 * send_mos_cmd
 *	this function will be used for sending command to device
 */
static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
			__u16 index, void *data)
{
	int status;
	unsigned int pipe;
	u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
	__u8 requesttype;
	__u16 size = 0x0000;

	if (value < MOS_MAX_PORT) {
		if (product == MOSCHIP_DEVICE_ID_7715) {
			value = value*0x100+0x100;
		} else {
			value = value*0x100+0x200;
		}
	} else {
		value = 0x0000;
		if ((product == MOSCHIP_DEVICE_ID_7715) &&
		    (index != 0x08)) {
			dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
			//index = 0x01 ;
		}
	}

	if (request == MOS_WRITE) {
		request = (__u8)MOS_WRITE;
		requesttype = (__u8)0x40;
		value  = value + (__u16)*((unsigned char *)data);
		data = NULL;
		pipe = usb_sndctrlpipe(serial->dev, 0);
	} else {
		request = (__u8)MOS_READ;
		requesttype = (__u8)0xC0;
		size = 0x01;
		pipe = usb_rcvctrlpipe(serial->dev,0);
	}

	status = usb_control_msg(serial->dev, pipe, request, requesttype,
				 value, index, data, size, MOS_WDR_TIMEOUT);

	if (status < 0)
		dbg("Command Write failed Value %x index %x\n",value,index);

	return status;
}

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static int mos7720_open(struct tty_struct *tty,
			struct usb_serial_port *port, struct file * filp)
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{
	struct usb_serial *serial;
	struct usb_serial_port *port0;
	struct urb *urb;
	struct moschip_serial *mos7720_serial;
	struct moschip_port *mos7720_port;
	int response;
	int port_number;
	char data;
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	int allocated_urbs = 0;
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	int j;

	serial = port->serial;

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL)
		return -ENODEV;

	port0 = serial->port[0];

	mos7720_serial = usb_get_serial_data(serial);

	if (mos7720_serial == NULL || port0 == NULL)
		return -ENODEV;

	usb_clear_halt(serial->dev, port->write_urb->pipe);
	usb_clear_halt(serial->dev, port->read_urb->pipe);

	/* Initialising the write urb pool */
	for (j = 0; j < NUM_URBS; ++j) {
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		urb = usb_alloc_urb(0,GFP_KERNEL);
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		mos7720_port->write_urb_pool[j] = urb;

		if (urb == NULL) {
			err("No more urbs???");
			continue;
		}

		urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
					       GFP_KERNEL);
		if (!urb->transfer_buffer) {
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			err("%s-out of memory for urb buffers.", __func__);
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			usb_free_urb(mos7720_port->write_urb_pool[j]);
			mos7720_port->write_urb_pool[j] = NULL;
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			continue;
		}
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		allocated_urbs++;
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	}

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	if (!allocated_urbs)
		return -ENOMEM;

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	 /* Initialize MCS7720 -- Write Init values to corresponding Registers
	  *
	  * Register Index
	  * 1 : IER
	  * 2 : FCR
	  * 3 : LCR
	  * 4 : MCR
	  *
	  * 0x08 : SP1/2 Control Reg
	  */
	port_number = port->number - port->serial->minor;
	send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
	dbg("SS::%p LSR:%x\n",mos7720_port, data);

	dbg("Check:Sending Command ..........");

	data = 0x02;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
	data = 0x02;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);

	data = 0x00;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
	data = 0x00;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);

	data = 0xCF;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
	data = 0x03;
        mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
	data = 0x0b;
        mos7720_port->shadowMCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
	data = 0x0b;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);

	data = 0x00;
	send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
	data = 0x00;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);

/*	data = 0x00;
	send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
	data = 0x03;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
	data = 0x00;
	send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
*/
	data = 0x00;
	send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);

	data = data | (port->number - port->serial->minor + 1);
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);

	data = 0x83;
        mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
	data = 0x0c;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
	data = 0x00;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
	data = 0x03;
        mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
	data = 0x0c;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
	data = 0x0c;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);

	/* force low_latency on so that our tty_push actually forces *
	 * the data through,otherwise it is scheduled, and with      *
	 * high data rates (like with OHCI) data can get lost.       */

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	if (tty)
		tty->low_latency = 1;
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	/* see if we've set up our endpoint info yet   *
	 * (can't set it up in mos7720_startup as the  *
	 * structures were not set up at that time.)   */
	if (!mos7720_serial->interrupt_started) {
		dbg("Interrupt buffer NULL !!!");

		/* not set up yet, so do it now */
		mos7720_serial->interrupt_started = 1;

		dbg("To Submit URB !!!");

		/* set up our interrupt urb */
		usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
				 usb_rcvintpipe(serial->dev,
				 		port->interrupt_in_endpointAddress),
				 port0->interrupt_in_buffer,
				 port0->interrupt_in_urb->transfer_buffer_length,
				 mos7720_interrupt_callback, mos7720_port,
				 port0->interrupt_in_urb->interval);

		/* start interrupt read for this mos7720 this interrupt *
	         * will continue as long as the mos7720 is connected    */
		dbg("Submit URB over !!!");
		response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
		if (response)
			dev_err(&port->dev,
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				"%s - Error %d submitting control urb\n",
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				__func__, response);
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	}

	/* set up our bulk in urb */
	usb_fill_bulk_urb(port->read_urb, serial->dev,
			  usb_rcvbulkpipe(serial->dev,
			  		  port->bulk_in_endpointAddress),
			  port->bulk_in_buffer,
			  port->read_urb->transfer_buffer_length,
			  mos7720_bulk_in_callback, mos7720_port);
	response = usb_submit_urb(port->read_urb, GFP_KERNEL);
	if (response)
		dev_err(&port->dev,
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			"%s - Error %d submitting read urb\n", __func__, response);
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	/* initialize our icount structure */
	memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));

	/* initialize our port settings */
	mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */

	/* send a open port command */
	mos7720_port->open = 1;

	return 0;
}

/*
 * mos7720_chars_in_buffer
 *	this function is called by the tty driver when it wants to know how many
 *	bytes of data we currently have outstanding in the port (data that has
 *	been written, but hasn't made it out the port yet)
 *	If successful, we return the number of bytes left to be written in the
 *	system,
 *	Otherwise we return a negative error number.
 */
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static int mos7720_chars_in_buffer(struct tty_struct *tty)
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{
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	struct usb_serial_port *port = tty->driver_data;
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	int i;
	int chars = 0;
	struct moschip_port *mos7720_port;

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	dbg("%s:entering ...........", __func__);
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	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL) {
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		dbg("%s:leaving ...........", __func__);
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		return -ENODEV;
	}

	for (i = 0; i < NUM_URBS; ++i) {
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		if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
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			chars += URB_TRANSFER_BUFFER_SIZE;
	}
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	dbg("%s - returns %d", __func__, chars);
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	return chars;
}

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static void mos7720_close(struct tty_struct *tty,
			struct usb_serial_port *port, struct file *filp)
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{
	struct usb_serial *serial;
	struct moschip_port *mos7720_port;
	char data;
	int j;

	dbg("mos7720_close:entering...");

	serial = port->serial;

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL)
		return;

	for (j = 0; j < NUM_URBS; ++j)
		usb_kill_urb(mos7720_port->write_urb_pool[j]);

	/* Freeing Write URBs */
	for (j = 0; j < NUM_URBS; ++j) {
		if (mos7720_port->write_urb_pool[j]) {
			kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
			usb_free_urb(mos7720_port->write_urb_pool[j]);
		}
	}

	/* While closing port, shutdown all bulk read, write  *
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	 * and interrupt read if they exists, otherwise nop   */
	dbg("Shutdown bulk write");
	usb_kill_urb(port->write_urb);
	dbg("Shutdown bulk read");
	usb_kill_urb(port->read_urb);

	mutex_lock(&serial->disc_mutex);
	/* these commands must not be issued if the device has
	 * been disconnected */
	if (!serial->disconnected) {
		data = 0x00;
		send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
			     0x04, &data);

		data = 0x00;
		send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
			     0x01, &data);
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	}
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	mutex_unlock(&serial->disc_mutex);
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	mos7720_port->open = 0;

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	dbg("Leaving %s", __func__);
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}

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static void mos7720_break(struct tty_struct *tty, int break_state)
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{
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	struct usb_serial_port *port = tty->driver_data;
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        unsigned char data;
	struct usb_serial *serial;
	struct moschip_port *mos7720_port;

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	dbg("Entering %s", __func__);
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	serial = port->serial;

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL)
		return;

	if (break_state == -1)
		data = mos7720_port->shadowLCR | UART_LCR_SBC;
	else
		data = mos7720_port->shadowLCR & ~UART_LCR_SBC;

	mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
		     0x03, &data);

	return;
}

/*
 * mos7720_write_room
 *	this function is called by the tty driver when it wants to know how many
 *	bytes of data we can accept for a specific port.
 *	If successful, we return the amount of room that we have for this port
 *	Otherwise we return a negative error number.
 */
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static int mos7720_write_room(struct tty_struct *tty)
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{
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	struct usb_serial_port *port = tty->driver_data;
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	struct moschip_port *mos7720_port;
	int room = 0;
	int i;

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	dbg("%s:entering ...........", __func__);
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	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL) {
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		dbg("%s:leaving ...........", __func__);
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		return -ENODEV;
	}

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	/* FIXME: Locking */
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	for (i = 0; i < NUM_URBS; ++i) {
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		if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
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			room += URB_TRANSFER_BUFFER_SIZE;
	}

647
	dbg("%s - returns %d", __func__, room);
648 649 650
	return room;
}

A
Alan Cox 已提交
651 652
static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port,
				 const unsigned char *data, int count)
653 654 655 656 657 658 659 660 661 662 663
{
	int status;
	int i;
	int bytes_sent = 0;
	int transfer_size;

	struct moschip_port *mos7720_port;
	struct usb_serial *serial;
	struct urb    *urb;
	const unsigned char *current_position = data;

664
	dbg("%s:entering ...........", __func__);
665 666 667 668 669 670 671 672 673 674 675 676 677

	serial = port->serial;

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL) {
		dbg("mos7720_port is NULL");
		return -ENODEV;
	}

	/* try to find a free urb in the list */
	urb = NULL;

	for (i = 0; i < NUM_URBS; ++i) {
O
Oliver Neukum 已提交
678
		if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
679 680 681 682 683 684 685
			urb = mos7720_port->write_urb_pool[i];
			dbg("URB:%d",i);
			break;
		}
	}

	if (urb == NULL) {
686
		dbg("%s - no more free urbs", __func__);
687 688 689 690 691 692 693
		goto exit;
	}

	if (urb->transfer_buffer == NULL) {
		urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
					       GFP_KERNEL);
		if (urb->transfer_buffer == NULL) {
694
			err("%s no more kernel memory...", __func__);
695 696 697 698 699 700
			goto exit;
		}
	}
	transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);

	memcpy(urb->transfer_buffer, current_position, transfer_size);
701
	usb_serial_debug_data(debug, &port->dev, __func__, transfer_size,
702 703 704 705 706 707 708 709 710 711 712 713 714
			      urb->transfer_buffer);

	/* fill urb with data and submit  */
	usb_fill_bulk_urb(urb, serial->dev,
			  usb_sndbulkpipe(serial->dev,
			  		  port->bulk_out_endpointAddress),
			  urb->transfer_buffer, transfer_size,
			  mos7720_bulk_out_data_callback, mos7720_port);

	/* send it down the pipe */
	status = usb_submit_urb(urb,GFP_ATOMIC);
	if (status) {
		err("%s - usb_submit_urb(write bulk) failed with status = %d",
715
		    __func__, status);
716 717 718 719 720 721 722 723 724
		bytes_sent = status;
		goto exit;
	}
	bytes_sent = transfer_size;

exit:
	return bytes_sent;
}

A
Alan Cox 已提交
725
static void mos7720_throttle(struct tty_struct *tty)
726
{
A
Alan Cox 已提交
727
	struct usb_serial_port *port = tty->driver_data;
728 729 730
	struct moschip_port *mos7720_port;
	int status;

731
	dbg("%s- port %d\n", __func__, port->number);
732 733 734 735 736 737 738 739 740 741 742

	mos7720_port = usb_get_serial_port_data(port);

	if (mos7720_port == NULL)
		return;

	if (!mos7720_port->open) {
		dbg("port not opened");
		return;
	}

743
	dbg("%s: Entering ..........", __func__);
744 745 746 747

	/* if we are implementing XON/XOFF, send the stop character */
	if (I_IXOFF(tty)) {
		unsigned char stop_char = STOP_CHAR(tty);
A
Alan Cox 已提交
748
		status = mos7720_write(tty, port, &stop_char, 1);
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763
		if (status <= 0)
			return;
	}

	/* if we are implementing RTS/CTS, toggle that line */
	if (tty->termios->c_cflag & CRTSCTS) {
		mos7720_port->shadowMCR &= ~UART_MCR_RTS;
		status = send_mos_cmd(port->serial, MOS_WRITE,
				      port->number - port->serial->minor,
				      UART_MCR, &mos7720_port->shadowMCR);
		if (status != 0)
			return;
	}
}

A
Alan Cox 已提交
764
static void mos7720_unthrottle(struct tty_struct *tty)
765
{
A
Alan Cox 已提交
766
	struct usb_serial_port *port = tty->driver_data;
767
	struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
A
Alan Cox 已提交
768
	int status;
769 770 771 772 773

	if (mos7720_port == NULL)
		return;

	if (!mos7720_port->open) {
774
		dbg("%s - port not opened", __func__);
775 776 777
		return;
	}

778
	dbg("%s: Entering ..........", __func__);
779 780 781 782

	/* if we are implementing XON/XOFF, send the start character */
	if (I_IXOFF(tty)) {
		unsigned char start_char = START_CHAR(tty);
A
Alan Cox 已提交
783
		status = mos7720_write(tty, port, &start_char, 1);
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
		if (status <= 0)
			return;
	}

	/* if we are implementing RTS/CTS, toggle that line */
	if (tty->termios->c_cflag & CRTSCTS) {
		mos7720_port->shadowMCR |= UART_MCR_RTS;
		status = send_mos_cmd(port->serial, MOS_WRITE,
				      port->number - port->serial->minor,
				      UART_MCR, &mos7720_port->shadowMCR);
		if (status != 0)
			return;
	}
}

static int set_higher_rates(struct moschip_port *mos7720_port,
			    unsigned int baud)
{
	unsigned char data;
	struct usb_serial_port *port;
	struct usb_serial *serial;
	int port_number;

	if (mos7720_port == NULL)
		return -EINVAL;

	port = mos7720_port->port;
	serial = port->serial;

        /***********************************************
         *      Init Sequence for higher rates
         ***********************************************/
	dbg("Sending Setting Commands ..........");
	port_number = port->number - port->serial->minor;

	data = 0x000;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
	data = 0x000;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
	data = 0x0CF;
	send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
	data = 0x00b;
        mos7720_port->shadowMCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
	data = 0x00b;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);

	data = 0x000;
	send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
	data = 0x000;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);


        /***********************************************
         *              Set for higher rates           *
         ***********************************************/

	data = baud * 0x10;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);

	data = 0x003;
	send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
	data = 0x003;
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);

	data = 0x02b;
        mos7720_port->shadowMCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
	data = 0x02b;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);

        /***********************************************
         *              Set DLL/DLM
         ***********************************************/

	data = mos7720_port->shadowLCR | UART_LCR_DLAB;
        mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);

	data =  0x001; /* DLL */
        send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
	data =  0x000; /* DLM */
        send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);

	data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
        mos7720_port->shadowLCR  = data;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);

	return 0;
}

/* baud rate information */
struct divisor_table_entry
{
	__u32  baudrate;
	__u16  divisor;
};

/* Define table of divisors for moschip 7720 hardware	   *
 * These assume a 3.6864MHz crystal, the standard /16, and *
 * MCR.7 = 0.						   */
static struct divisor_table_entry divisor_table[] = {
	{   50,		2304},
	{   110,	1047},	/* 2094.545455 => 230450   => .0217 % over */
	{   134,	857},	/* 1713.011152 => 230398.5 => .00065% under */
	{   150,	768},
	{   300,	384},
	{   600,	192},
	{   1200,	96},
	{   1800,	64},
	{   2400,	48},
	{   4800,	24},
	{   7200,	16},
	{   9600,	12},
	{   19200,	6},
	{   38400,	3},
	{   57600,	2},
	{   115200,	1},
};

/*****************************************************************************
 * calc_baud_rate_divisor
 *	this function calculates the proper baud rate divisor for the specified
 *	baud rate.
 *****************************************************************************/
static int calc_baud_rate_divisor(int baudrate, int *divisor)
{
	int i;
	__u16 custom;
	__u16 round1;
	__u16 round;


917
	dbg("%s - %d", __func__, baudrate);
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967

	for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
		if (divisor_table[i].baudrate == baudrate) {
			*divisor = divisor_table[i].divisor;
			return 0;
		}
	}

        /* After trying for all the standard baud rates    *
         * Try calculating the divisor for this baud rate  */
	if (baudrate > 75 &&  baudrate < 230400) {
		/* get the divisor */
		custom = (__u16)(230400L  / baudrate);

		/* Check for round off */
		round1 = (__u16)(2304000L / baudrate);
		round = (__u16)(round1 - (custom * 10));
		if (round > 4)
			custom++;
		*divisor = custom;

		dbg("Baud %d = %d",baudrate, custom);
		return 0;
	}

	dbg("Baud calculation Failed...");
	return -EINVAL;
}

/*
 * send_cmd_write_baud_rate
 *	this function sends the proper command to change the baud rate of the
 *	specified port.
 */
static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
				    int baudrate)
{
	struct usb_serial_port *port;
	struct usb_serial *serial;
	int divisor;
	int status;
	unsigned char data;
	unsigned char number;

	if (mos7720_port == NULL)
		return -1;

	port = mos7720_port->port;
	serial = port->serial;

968
	dbg("%s: Entering ..........", __func__);
969 970

	number = port->number - port->serial->minor;
971
	dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate);
972 973 974 975

        /* Calculate the Divisor */
	status = calc_baud_rate_divisor(baudrate, &divisor);
	if (status) {
976
		err("%s - bad baud rate", __func__);
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
		return status;
	}

        /* Enable access to divisor latch */
        data = mos7720_port->shadowLCR | UART_LCR_DLAB;
        mos7720_port->shadowLCR  = data;
        send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);

	/* Write the divisor */
	data = ((unsigned char)(divisor & 0xff));
        send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);

	data = ((unsigned char)((divisor & 0xff00) >> 8));
        send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);

        /* Disable access to divisor latch */
        data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
        mos7720_port->shadowLCR = data;
        send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);

	return status;
}

/*
 * change_port_settings
 *	This routine is called to set the UART on the device to match
 *      the specified new settings.
 */
A
Alan Cox 已提交
1005 1006
static void change_port_settings(struct tty_struct *tty,
				 struct moschip_port *mos7720_port,
A
Alan Cox 已提交
1007
				 struct ktermios *old_termios)
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
{
	struct usb_serial_port *port;
	struct usb_serial *serial;
	int baud;
	unsigned cflag;
	unsigned iflag;
	__u8 mask = 0xff;
	__u8 lData;
	__u8 lParity;
	__u8 lStop;
	int status;
	int port_number;
	char data;

	if (mos7720_port == NULL)
		return ;

	port = mos7720_port->port;
	serial = port->serial;
	port_number = port->number - port->serial->minor;

1029
	dbg("%s - port %d", __func__, port->number);
1030 1031

	if (!mos7720_port->open) {
1032
		dbg("%s - port not opened", __func__);
1033 1034 1035
		return;
	}

1036
	dbg("%s: Entering ..........", __func__);
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070

	lData = UART_LCR_WLEN8;
	lStop = 0x00;	/* 1 stop bit */
	lParity = 0x00;	/* No parity */

	cflag = tty->termios->c_cflag;
	iflag = tty->termios->c_iflag;

	/* Change the number of bits */
	switch (cflag & CSIZE) {
	case CS5:
		lData = UART_LCR_WLEN5;
		mask = 0x1f;
		break;

	case CS6:
		lData = UART_LCR_WLEN6;
		mask = 0x3f;
		break;

	case CS7:
		lData = UART_LCR_WLEN7;
		mask = 0x7f;
		break;
	default:
	case CS8:
		lData = UART_LCR_WLEN8;
		break;
	}

	/* Change the Parity bit */
	if (cflag & PARENB) {
		if (cflag & PARODD) {
			lParity = UART_LCR_PARITY;
1071
			dbg("%s - parity = odd", __func__);
1072 1073
		} else {
			lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1074
			dbg("%s - parity = even", __func__);
1075 1076 1077
		}

	} else {
1078
		dbg("%s - parity = none", __func__);
1079 1080 1081 1082 1083 1084 1085 1086
	}

	if (cflag & CMSPAR)
		lParity = lParity | 0x20;

	/* Change the Stop bit */
	if (cflag & CSTOPB) {
		lStop = UART_LCR_STOP;
1087
		dbg("%s - stop bits = 2", __func__);
1088 1089
	} else {
		lStop = 0x00;
1090
		dbg("%s - stop bits = 1", __func__);
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
	}

#define LCR_BITS_MASK		0x03	/* Mask for bits/char field */
#define LCR_STOP_MASK		0x04	/* Mask for stop bits field */
#define LCR_PAR_MASK		0x38	/* Mask for parity field */

	/* Update the LCR with the correct value */
	mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
	mos7720_port->shadowLCR |= (lData | lParity | lStop);


	/* Disable Interrupts */
	data = 0x00;
        send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);

	data = 0x00;
        send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);

	data = 0xcf;
        send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);

	/* Send the updated LCR value to the mos7720 */
	data = mos7720_port->shadowLCR;
        send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);

        data = 0x00b;
        mos7720_port->shadowMCR = data;
        send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
        data = 0x00b;
        send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);

	/* set up the MCR register and send it to the mos7720 */
	mos7720_port->shadowMCR = UART_MCR_OUT2;
	if (cflag & CBAUD)
		mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);

	if (cflag & CRTSCTS) {
		mos7720_port->shadowMCR |= (UART_MCR_XONANY);

                /* To set hardware flow control to the specified *
                 * serial port, in SP1/2_CONTROL_REG             */
		if (port->number) {
			data = 0x001;
			send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
				     0x08, &data);
		} else {
			data = 0x002;
			send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
				     0x08, &data);
		}
	} else {
		mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
	}

	data = mos7720_port->shadowMCR;
	send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);

	/* Determine divisor based on baud rate */
	baud = tty_get_baud_rate(tty);
	if (!baud) {
		/* pick a default, any default... */
		dbg("Picked default baud...");
		baud = 9600;
	}

	if (baud >= 230400) {
		set_higher_rates(mos7720_port, baud);
		/* Enable Interrupts */
		data = 0x0c;
		send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
		return;
	}

1164
	dbg("%s - baud rate = %d", __func__, baud);
1165
	status = send_cmd_write_baud_rate(mos7720_port, baud);
A
Alan Cox 已提交
1166 1167 1168 1169
	/* FIXME: needs to write actual resulting baud back not just
	   blindly do so */
	if (cflag & CBAUD)
		tty_encode_baud_rate(tty, baud, baud);
1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
	/* Enable Interrupts */
	data = 0x0c;
	send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);

	if (port->read_urb->status != -EINPROGRESS) {
		port->read_urb->dev = serial->dev;

		status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
		if (status)
			dbg("usb_submit_urb(read bulk) failed, status = %d",
			    status);
	}
	return;
}

/*
 * mos7720_set_termios
 *	this function is called by the tty driver when it wants to change the
 *	termios structure.
 */
A
Alan Cox 已提交
1190 1191
static void mos7720_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
{
	int status;
	unsigned int cflag;
	struct usb_serial *serial;
	struct moschip_port *mos7720_port;

	serial = port->serial;

	mos7720_port = usb_get_serial_port_data(port);

	if (mos7720_port == NULL)
		return;

	if (!mos7720_port->open) {
1206
		dbg("%s - port not opened", __func__);
1207 1208 1209 1210 1211 1212 1213
		return;
	}

	dbg("%s\n","setting termios - ASPIRE");

	cflag = tty->termios->c_cflag;

1214
	dbg("%s - cflag %08x iflag %08x", __func__,
1215 1216 1217
	    tty->termios->c_cflag,
	    RELEVANT_IFLAG(tty->termios->c_iflag));

1218
	dbg("%s - old cflag %08x old iflag %08x", __func__,
A
Alan Cox 已提交
1219 1220
	    old_termios->c_cflag,
	    RELEVANT_IFLAG(old_termios->c_iflag));
1221

1222
	dbg("%s - port %d", __func__, port->number);
1223 1224

	/* change the port settings to the new ones specified */
A
Alan Cox 已提交
1225
	change_port_settings(tty, mos7720_port, old_termios);
1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251

	if(!port->read_urb) {
		dbg("%s","URB KILLED !!!!!\n");
		return;
	}

	if(port->read_urb->status != -EINPROGRESS) {
		port->read_urb->dev = serial->dev;
		status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
		if (status)
			dbg("usb_submit_urb(read bulk) failed, status = %d",
			    status);
	}
	return;
}

/*
 * get_lsr_info - get line status register info
 *
 * Purpose: Let user call ioctl() to get info when the UART physically
 * 	    is emptied.  On bus types like RS485, the transmitter must
 * 	    release the bus after transmitting. This must be done when
 * 	    the transmit shift register is empty, not be done when the
 * 	    transmit holding register is empty.  This functionality
 * 	    allows an RS485 driver to be written in user space.
 */
A
Alan Cox 已提交
1252
static int get_lsr_info(struct tty_struct *tty, struct moschip_port *mos7720_port,
1253 1254 1255 1256 1257
			unsigned int __user *value)
{
	int count;
	unsigned int result = 0;

A
Alan Cox 已提交
1258
	count = mos7720_chars_in_buffer(tty);
1259
	if (count == 0) {
1260
		dbg("%s -- Empty", __func__);
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277
		result = TIOCSER_TEMT;
	}

	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;
	return 0;
}

/*
 * get_number_bytes_avail - get number of bytes available
 *
 * Purpose: Let user call ioctl to get the count of number of bytes available.
 */
static int get_number_bytes_avail(struct moschip_port *mos7720_port,
				  unsigned int __user *value)
{
	unsigned int result = 0;
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	struct tty_struct *tty = mos7720_port->port->port.tty;
1279 1280 1281 1282 1283 1284

	if (!tty)
		return -ENOIOCTLCMD;

	result = tty->read_cnt;

1285
	dbg("%s(%d) = %d", __func__,  mos7720_port->port->number, result);
1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;

	return -ENOIOCTLCMD;
}

static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
			  unsigned int __user *value)
{
	unsigned int mcr ;
	unsigned int arg;
	unsigned char data;

	struct usb_serial_port *port;

	if (mos7720_port == NULL)
		return -1;

	port = (struct usb_serial_port*)mos7720_port->port;
	mcr = mos7720_port->shadowMCR;

	if (copy_from_user(&arg, value, sizeof(int)))
		return -EFAULT;

	switch (cmd) {
	case TIOCMBIS:
		if (arg & TIOCM_RTS)
			mcr |= UART_MCR_RTS;
		if (arg & TIOCM_DTR)
			mcr |= UART_MCR_RTS;
		if (arg & TIOCM_LOOP)
			mcr |= UART_MCR_LOOP;
		break;

	case TIOCMBIC:
		if (arg & TIOCM_RTS)
			mcr &= ~UART_MCR_RTS;
		if (arg & TIOCM_DTR)
			mcr &= ~UART_MCR_RTS;
		if (arg & TIOCM_LOOP)
			mcr &= ~UART_MCR_LOOP;
		break;

	case TIOCMSET:
		/* turn off the RTS and DTR and LOOPBACK
		 * and then only turn on what was asked to */
		mcr &=  ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
		mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
		mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
		mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
		break;
	}

	mos7720_port->shadowMCR = mcr;

	data = mos7720_port->shadowMCR;
	send_mos_cmd(port->serial, MOS_WRITE,
		     port->number - port->serial->minor, UART_MCR, &data);

	return 0;
}

static int get_modem_info(struct moschip_port *mos7720_port,
			  unsigned int __user *value)
{
	unsigned int result = 0;
	unsigned int msr = mos7720_port->shadowMSR;
	unsigned int mcr = mos7720_port->shadowMCR;

	result = ((mcr & UART_MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
		  | ((mcr & UART_MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
		  | ((msr & UART_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
		  | ((msr & UART_MSR_DCD)	? TIOCM_CAR: 0)   /* 0x040 */
		  | ((msr & UART_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
		  | ((msr & UART_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */


1363
	dbg("%s -- %x", __func__, result);
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394

	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;
	return 0;
}

static int get_serial_info(struct moschip_port *mos7720_port,
			   struct serial_struct __user *retinfo)
{
	struct serial_struct tmp;

	if (!retinfo)
		return -EFAULT;

	memset(&tmp, 0, sizeof(tmp));

	tmp.type		= PORT_16550A;
	tmp.line		= mos7720_port->port->serial->minor;
	tmp.port		= mos7720_port->port->number;
	tmp.irq			= 0;
	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
        tmp.xmit_fifo_size	= NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
	tmp.baud_base		= 9600;
	tmp.close_delay		= 5*HZ;
	tmp.closing_wait	= 30*HZ;

	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
		return -EFAULT;
	return 0;
}

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static int mos7720_ioctl(struct tty_struct *tty, struct file *file,
1396 1397
			 unsigned int cmd, unsigned long arg)
{
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1398
	struct usb_serial_port *port = tty->driver_data;
1399 1400 1401 1402 1403 1404 1405 1406 1407
	struct moschip_port *mos7720_port;
	struct async_icount cnow;
	struct async_icount cprev;
	struct serial_icounter_struct icount;

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL)
		return -ENODEV;

1408
	dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1409 1410 1411 1412

	switch (cmd) {
	case TIOCINQ:
		/* return number of bytes available */
1413
		dbg("%s (%d) TIOCINQ", __func__,  port->number);
1414 1415 1416 1417 1418
		return get_number_bytes_avail(mos7720_port,
					      (unsigned int __user *)arg);
		break;

	case TIOCSERGETLSR:
1419
		dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
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Alan Cox 已提交
1420
		return get_lsr_info(tty, mos7720_port, (unsigned int __user *)arg);
1421 1422
		return 0;

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Alan Cox 已提交
1423
	/* FIXME: These should be using the mode methods */
1424 1425 1426
	case TIOCMBIS:
	case TIOCMBIC:
	case TIOCMSET:
1427
		dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
1428 1429 1430 1431 1432
		    port->number);
		return set_modem_info(mos7720_port, cmd,
				      (unsigned int __user *)arg);

	case TIOCMGET:
1433
		dbg("%s (%d) TIOCMGET", __func__,  port->number);
1434 1435 1436 1437
		return get_modem_info(mos7720_port,
				      (unsigned int __user *)arg);

	case TIOCGSERIAL:
1438
		dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1439 1440 1441 1442
		return get_serial_info(mos7720_port,
				       (struct serial_struct __user *)arg);

	case TIOCMIWAIT:
1443
		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
		cprev = mos7720_port->icount;
		while (1) {
			if (signal_pending(current))
				return -ERESTARTSYS;
			cnow = mos7720_port->icount;
			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
			    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
				return -EIO; /* no change => error */
			if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
			    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
			    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
				return 0;
			}
			cprev = cnow;
		}
		/* NOTREACHED */
		break;

	case TIOCGICOUNT:
		cnow = mos7720_port->icount;
		icount.cts = cnow.cts;
		icount.dsr = cnow.dsr;
		icount.rng = cnow.rng;
		icount.dcd = cnow.dcd;
		icount.rx = cnow.rx;
		icount.tx = cnow.tx;
		icount.frame = cnow.frame;
		icount.overrun = cnow.overrun;
		icount.parity = cnow.parity;
		icount.brk = cnow.brk;
		icount.buf_overrun = cnow.buf_overrun;

1477
		dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
		    port->number, icount.rx, icount.tx );
		if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
			return -EFAULT;
		return 0;
	}

	return -ENOIOCTLCMD;
}

static int mos7720_startup(struct usb_serial *serial)
{
	struct moschip_serial *mos7720_serial;
	struct moschip_port *mos7720_port;
	struct usb_device *dev;
	int i;
	char data;

1495
	dbg("%s: Entering ..........", __func__);
1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506

	if (!serial) {
		dbg("Invalid Handler");
		return -ENODEV;
	}

	dev = serial->dev;

	/* create our private serial structure */
	mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
	if (mos7720_serial == NULL) {
1507
		err("%s - Out of memory", __func__);
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
		return -ENOMEM;
	}

	usb_set_serial_data(serial, mos7720_serial);

	/* we set up the pointers to the endpoints in the mos7720_open *
	 * function, as the structures aren't created yet.             */

	/* set up port private structures */
	for (i = 0; i < serial->num_ports; ++i) {
		mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
		if (mos7720_port == NULL) {
1520
			err("%s - Out of memory", __func__);
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566
			usb_set_serial_data(serial, NULL);
			kfree(mos7720_serial);
			return -ENOMEM;
		}

		/* Initialize all port interrupt end point to port 0 int
		 * endpoint.  Our device has only one interrupt endpoint
		 * comman to all ports */
		serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;

		mos7720_port->port = serial->port[i];
		usb_set_serial_port_data(serial->port[i], mos7720_port);

		dbg("port number is %d", serial->port[i]->number);
		dbg("serial number is %d", serial->minor);
	}


	/* setting configuration feature to one */
	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			(__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);

	send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data);  // LSR For Port 1
	dbg("LSR:%x",data);

	send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data);  // LSR For Port 2
	dbg("LSR:%x",data);

	return 0;
}

static void mos7720_shutdown(struct usb_serial *serial)
{
	int i;

	/* free private structure allocated for serial port */
	for (i=0; i < serial->num_ports; ++i) {
		kfree(usb_get_serial_port_data(serial->port[i]));
		usb_set_serial_port_data(serial->port[i], NULL);
	}

	/* free private structure allocated for serial device */
	kfree(usb_get_serial_data(serial));
	usb_set_serial_data(serial, NULL);
}

1567 1568 1569 1570 1571 1572 1573 1574
static struct usb_driver usb_driver = {
	.name =		"moschip7720",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	moschip_port_id_table,
	.no_dynamic_id =	1,
};

1575 1576 1577 1578 1579 1580
static struct usb_serial_driver moschip7720_2port_driver = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"moschip7720",
	},
	.description		= "Moschip 2 port adapter",
1581
	.usb_driver		= &usb_driver,
1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	.id_table		= moschip_port_id_table,
	.num_ports		= 2,
	.open			= mos7720_open,
	.close			= mos7720_close,
	.throttle		= mos7720_throttle,
	.unthrottle		= mos7720_unthrottle,
	.attach			= mos7720_startup,
	.shutdown		= mos7720_shutdown,
	.ioctl			= mos7720_ioctl,
	.set_termios		= mos7720_set_termios,
	.write			= mos7720_write,
	.write_room		= mos7720_write_room,
	.chars_in_buffer	= mos7720_chars_in_buffer,
	.break_ctl		= mos7720_break,
	.read_bulk_callback	= mos7720_bulk_in_callback,
1597
	.read_int_callback	= mos7720_interrupt_callback,
1598 1599 1600 1601 1602 1603
};

static int __init moschip7720_init(void)
{
	int retval;

1604
	dbg("%s: Entering ..........", __func__);
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642

	/* Register with the usb serial */
	retval = usb_serial_register(&moschip7720_2port_driver);
	if (retval)
		goto failed_port_device_register;

	info(DRIVER_DESC " " DRIVER_VERSION);

	/* Register with the usb */
	retval = usb_register(&usb_driver);
	if (retval)
		goto failed_usb_register;

	return 0;

failed_usb_register:
	usb_serial_deregister(&moschip7720_2port_driver);

failed_port_device_register:
	return retval;
}

static void __exit moschip7720_exit(void)
{
	usb_deregister(&usb_driver);
	usb_serial_deregister(&moschip7720_2port_driver);
}

module_init(moschip7720_init);
module_exit(moschip7720_exit);

/* Module information */
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");