mos7720.c 41.1 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>
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#include <linux/uaccess.h>
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/*
 * 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 */
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struct moschip_port {
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	__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 */
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struct moschip_serial {
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	int interrupt_started;
};

static int debug;

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

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static const struct usb_device_id moschip_port_id_table[] = {
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	{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
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	{ } /* 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;

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	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) {
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		dbg("%s", "NULL mos7720_port pointer \n");
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		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 = tty_port_tty_get(&port->port);
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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);
	}
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	tty_kref_put(tty);
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	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 = tty_port_tty_get(&mos7720_port->port->port);
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	if (tty && mos7720_port->open)
		tty_wakeup(tty);
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	tty_kref_put(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,
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			__u16 index, u8 *data)
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{
	int status;
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	u8 *buf;
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	u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);

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

	if (request == MOS_WRITE) {
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		value = value + *data;
		status = usb_control_msg(serial->dev,
				usb_sndctrlpipe(serial->dev, 0), MOS_WRITE,
				0x40, value, index, NULL, 0, MOS_WDR_TIMEOUT);
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	} else {
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		buf = kmalloc(1, GFP_KERNEL);
		if (!buf) {
			status = -ENOMEM;
			goto out;
		}
		status = usb_control_msg(serial->dev,
				usb_rcvctrlpipe(serial->dev, 0), MOS_READ,
				0xc0, value, index, buf, 1, MOS_WDR_TIMEOUT);
		*data = *buf;
		kfree(buf);
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	}
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out:
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	if (status < 0)
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		dbg("Command Write failed Value %x index %x\n", value, index);
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	return status;
}

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static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
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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) {
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			dev_err(&port->dev, "No more urbs???\n");
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			continue;
		}

		urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
					       GFP_KERNEL);
		if (!urb->transfer_buffer) {
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			dev_err(&port->dev,
				"%s-out of memory for urb buffers.\n",
				__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
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	  * 0 : THR/RHR
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	  * 1 : IER
	  * 2 : FCR
	  * 3 : LCR
	  * 4 : MCR
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	  * 5 : LSR
	  * 6 : MSR
	  * 7 : SPR
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	  *
	  * 0x08 : SP1/2 Control Reg
	  */
	port_number = port->number - port->serial->minor;
	send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
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	dbg("SS::%p LSR:%x\n", mos7720_port, data);
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	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;
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	mos7720_port->shadowLCR  = data;
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	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
	data = 0x0b;
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	mos7720_port->shadowMCR  = data;
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	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;
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	send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT,
						port_number + 1, &data);
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*/
	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;
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	mos7720_port->shadowLCR  = data;
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	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;
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	mos7720_port->shadowLCR  = data;
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	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);

	/* 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,
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			 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);
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		/* start interrupt read for this mos7720 this interrupt *
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		 * will continue as long as the mos7720 is connected    */
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		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,
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				port->bulk_in_endpointAddress),
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			  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)
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		dev_err(&port->dev, "%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 0;
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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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			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 usb_serial_port *port)
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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;
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		send_mos_cmd(serial, MOS_WRITE,
			port->number - port->serial->minor, 0x04, &data);
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		data = 0x00;
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		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;
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	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.
 */
A
Alan Cox 已提交
624
static int mos7720_write_room(struct tty_struct *tty)
625
{
A
Alan Cox 已提交
626
	struct usb_serial_port *port = tty->driver_data;
627 628 629 630
	struct moschip_port *mos7720_port;
	int room = 0;
	int i;

631
	dbg("%s:entering ...........", __func__);
632 633 634

	mos7720_port = usb_get_serial_port_data(port);
	if (mos7720_port == NULL) {
635
		dbg("%s:leaving ...........", __func__);
636 637 638
		return -ENODEV;
	}

639
	/* FIXME: Locking */
640
	for (i = 0; i < NUM_URBS; ++i) {
A
Alan Cox 已提交
641 642
		if (mos7720_port->write_urb_pool[i] &&
		    mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
643 644 645
			room += URB_TRANSFER_BUFFER_SIZE;
	}

646
	dbg("%s - returns %d", __func__, room);
647 648 649
	return room;
}

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650 651
static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port,
				 const unsigned char *data, int count)
652 653 654 655 656 657 658 659 660 661 662
{
	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;

663
	dbg("%s:entering ...........", __func__);
664 665 666 667 668 669 670 671 672 673 674 675 676

	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) {
A
Alan Cox 已提交
677 678
		if (mos7720_port->write_urb_pool[i] &&
		    mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
679
			urb = mos7720_port->write_urb_pool[i];
A
Alan Cox 已提交
680
			dbg("URB:%d", i);
681 682 683 684 685
			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) {
694 695
			dev_err(&port->dev, "%s no more kernel memory...\n",
				__func__);
696 697 698
			goto exit;
		}
	}
A
Alan Cox 已提交
699
	transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
700 701

	memcpy(urb->transfer_buffer, current_position, transfer_size);
702
	usb_serial_debug_data(debug, &port->dev, __func__, transfer_size,
703 704 705 706 707
			      urb->transfer_buffer);

	/* fill urb with data and submit  */
	usb_fill_bulk_urb(urb, serial->dev,
			  usb_sndbulkpipe(serial->dev,
A
Alan Cox 已提交
708
					port->bulk_out_endpointAddress),
709 710 711 712
			  urb->transfer_buffer, transfer_size,
			  mos7720_bulk_out_data_callback, mos7720_port);

	/* send it down the pipe */
A
Alan Cox 已提交
713
	status = usb_submit_urb(urb, GFP_ATOMIC);
714
	if (status) {
715 716
		dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
			"with status = %d\n", __func__, status);
717 718 719 720 721 722 723 724 725
		bytes_sent = status;
		goto exit;
	}
	bytes_sent = transfer_size;

exit:
	return bytes_sent;
}

A
Alan Cox 已提交
726
static void mos7720_throttle(struct tty_struct *tty)
727
{
A
Alan Cox 已提交
728
	struct usb_serial_port *port = tty->driver_data;
729 730 731
	struct moschip_port *mos7720_port;
	int status;

732
	dbg("%s- port %d\n", __func__, port->number);
733 734 735 736 737 738 739 740 741 742 743

	mos7720_port = usb_get_serial_port_data(port);

	if (mos7720_port == NULL)
		return;

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

744
	dbg("%s: Entering ..........", __func__);
745 746 747 748

	/* 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
749
		status = mos7720_write(tty, port, &stop_char, 1);
750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
		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
765
static void mos7720_unthrottle(struct tty_struct *tty)
766
{
A
Alan Cox 已提交
767
	struct usb_serial_port *port = tty->driver_data;
768
	struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
A
Alan Cox 已提交
769
	int status;
770 771 772 773 774

	if (mos7720_port == NULL)
		return;

	if (!mos7720_port->open) {
775
		dbg("%s - port not opened", __func__);
776 777 778
		return;
	}

779
	dbg("%s: Entering ..........", __func__);
780 781 782 783

	/* 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
784
		status = mos7720_write(tty, port, &start_char, 1);
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
		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;

A
Alan Cox 已提交
814 815 816
	 /***********************************************
	 *      Init Sequence for higher rates
	 ***********************************************/
817 818 819 820 821 822 823 824 825 826
	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;
A
Alan Cox 已提交
827
	mos7720_port->shadowMCR  = data;
828 829 830 831 832 833 834 835 836 837
	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);


A
Alan Cox 已提交
838 839 840
	/***********************************************
	 *              Set for higher rates           *
	 ***********************************************/
841 842

	data = baud * 0x10;
A
Alan Cox 已提交
843
	send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
844 845 846 847 848 849 850

	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;
A
Alan Cox 已提交
851
	mos7720_port->shadowMCR  = data;
852 853 854 855
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
	data = 0x02b;
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);

A
Alan Cox 已提交
856 857 858
	/***********************************************
	 *              Set DLL/DLM
	 ***********************************************/
859 860

	data = mos7720_port->shadowLCR | UART_LCR_DLAB;
A
Alan Cox 已提交
861
	mos7720_port->shadowLCR  = data;
862 863 864
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);

	data =  0x001; /* DLL */
A
Alan Cox 已提交
865
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
866
	data =  0x000; /* DLM */
A
Alan Cox 已提交
867
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
868 869

	data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
A
Alan Cox 已提交
870
	mos7720_port->shadowLCR  = data;
871 872 873 874 875 876
	send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);

	return 0;
}

/* baud rate information */
A
Alan Cox 已提交
877
struct divisor_table_entry {
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
	__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

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

A
Alan Cox 已提交
926 927
	/* After trying for all the standard baud rates    *
	 * Try calculating the divisor for this baud rate  */
928 929 930 931 932 933 934 935 936 937 938
	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;

A
Alan Cox 已提交
939
		dbg("Baud %d = %d", baudrate, custom);
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
		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

A
Alan Cox 已提交
973
	/* Calculate the Divisor */
974 975
	status = calc_baud_rate_divisor(baudrate, &divisor);
	if (status) {
976
		dev_err(&port->dev, "%s - bad baud rate\n", __func__);
977 978 979
		return status;
	}

A
Alan Cox 已提交
980 981 982 983
	/* 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);
984 985 986

	/* Write the divisor */
	data = ((unsigned char)(divisor & 0xff));
A
Alan Cox 已提交
987
	send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
988 989

	data = ((unsigned char)((divisor & 0xff00) >> 8));
A
Alan Cox 已提交
990
	send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
991

A
Alan Cox 已提交
992 993 994 995
	/* 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);
996 997 998 999 1000 1001 1002 1003 1004

	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
	}

#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 */
A
Alan Cox 已提交
1098 1099
	mos7720_port->shadowLCR &=
			~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1100 1101 1102 1103 1104
	mos7720_port->shadowLCR |= (lData | lParity | lStop);


	/* Disable Interrupts */
	data = 0x00;
A
Alan Cox 已提交
1105 1106
	send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
							UART_IER, &data);
1107 1108

	data = 0x00;
A
Alan Cox 已提交
1109
	send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1110 1111

	data = 0xcf;
A
Alan Cox 已提交
1112
	send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1113 1114 1115

	/* Send the updated LCR value to the mos7720 */
	data = mos7720_port->shadowLCR;
A
Alan Cox 已提交
1116
	send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1117

A
Alan Cox 已提交
1118 1119 1120 1121 1122
	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);
1123 1124 1125 1126 1127 1128 1129 1130

	/* 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);
A
Alan Cox 已提交
1131 1132
		/* To set hardware flow control to the specified *
		 * serial port, in SP1/2_CONTROL_REG             */
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 1164
		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;
	}

1165
	dbg("%s - baud rate = %d", __func__, baud);
1166
	status = send_cmd_write_baud_rate(mos7720_port, baud);
A
Alan Cox 已提交
1167 1168 1169 1170
	/* FIXME: needs to write actual resulting baud back not just
	   blindly do so */
	if (cflag & CBAUD)
		tty_encode_baud_rate(tty, baud, baud);
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190
	/* 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
1191 1192
static void mos7720_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
{
	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) {
1207
		dbg("%s - port not opened", __func__);
1208 1209 1210
		return;
	}

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	dbg("%s\n", "setting termios - ASPIRE");
1212 1213 1214

	cflag = tty->termios->c_cflag;

1215
	dbg("%s - cflag %08x iflag %08x", __func__,
1216 1217 1218
	    tty->termios->c_cflag,
	    RELEVANT_IFLAG(tty->termios->c_iflag));

1219
	dbg("%s - old cflag %08x old iflag %08x", __func__,
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1220 1221
	    old_termios->c_cflag,
	    RELEVANT_IFLAG(old_termios->c_iflag));
1222

1223
	dbg("%s - port %d", __func__, port->number);
1224 1225

	/* change the port settings to the new ones specified */
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	change_port_settings(tty, mos7720_port, old_termios);
1227

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1228 1229
	if (!port->read_urb) {
		dbg("%s", "URB KILLED !!!!!\n");
1230 1231 1232
		return;
	}

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	if (port->read_urb->status != -EINPROGRESS) {
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
		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.
 */
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static int get_lsr_info(struct tty_struct *tty,
		struct moschip_port *mos7720_port, unsigned int __user *value)
1255
{
1256
	struct usb_serial_port *port = tty->driver_data;
1257
	unsigned int result = 0;
1258 1259 1260
	unsigned char data = 0;
	int port_number = port->number - port->serial->minor;
	int count;
1261

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	count = mos7720_chars_in_buffer(tty);
1263
	if (count == 0) {
1264 1265 1266 1267 1268 1269 1270
		send_mos_cmd(port->serial, MOS_READ, port_number,
							UART_LSR, &data);
		if ((data & (UART_LSR_TEMT | UART_LSR_THRE))
					== (UART_LSR_TEMT | UART_LSR_THRE)) {
			dbg("%s -- Empty", __func__);
			result = TIOCSER_TEMT;
		}
1271 1272 1273 1274 1275 1276
	}
	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;
	return 0;
}

1277 1278 1279 1280 1281 1282 1283 1284 1285 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
static int mos7720_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct usb_serial_port *port = tty->driver_data;
	struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
	unsigned int result = 0;
	unsigned int mcr ;
	unsigned int msr ;

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

	mcr = mos7720_port->shadowMCR;
	msr = mos7720_port->shadowMSR;

	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 */

	dbg("%s -- %x", __func__, result);

	return result;
}

static int mos7720_tiocmset(struct tty_struct *tty, struct file *file,
					unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;
	struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
	unsigned int mcr ;
	unsigned char lmcr;

	dbg("%s - port %d", __func__, port->number);
	dbg("he was at tiocmget");

	mcr = mos7720_port->shadowMCR;

	if (set & TIOCM_RTS)
		mcr |= UART_MCR_RTS;
	if (set & TIOCM_DTR)
		mcr |= UART_MCR_DTR;
	if (set & TIOCM_LOOP)
		mcr |= UART_MCR_LOOP;

	if (clear & TIOCM_RTS)
		mcr &= ~UART_MCR_RTS;
	if (clear & TIOCM_DTR)
		mcr &= ~UART_MCR_DTR;
	if (clear & TIOCM_LOOP)
		mcr &= ~UART_MCR_LOOP;

	mos7720_port->shadowMCR = mcr;
	lmcr = mos7720_port->shadowMCR;

	send_mos_cmd(port->serial, MOS_WRITE,
		port->number - port->serial->minor, UART_MCR, &lmcr);

	return 0;
}

1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
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;

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	port = (struct usb_serial_port *)mos7720_port->port;
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 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 1395 1396 1397 1398 1399 1400
	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;

	}

	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_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;
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1401
	tmp.xmit_fifo_size	= NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1402 1403 1404 1405 1406 1407 1408 1409 1410
	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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1411
static int mos7720_ioctl(struct tty_struct *tty, struct file *file,
1412 1413
			 unsigned int cmd, unsigned long arg)
{
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1414
	struct usb_serial_port *port = tty->driver_data;
1415 1416 1417 1418 1419 1420 1421 1422 1423
	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;

1424
	dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1425 1426 1427

	switch (cmd) {
	case TIOCSERGETLSR:
1428
		dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
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1429 1430
		return get_lsr_info(tty, mos7720_port,
					(unsigned int __user *)arg);
1431 1432
		return 0;

A
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1433
	/* FIXME: These should be using the mode methods */
1434 1435
	case TIOCMBIS:
	case TIOCMBIC:
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1436 1437
		dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET",
					__func__, port->number);
1438 1439 1440 1441
		return set_modem_info(mos7720_port, cmd,
				      (unsigned int __user *)arg);

	case TIOCGSERIAL:
1442
		dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1443 1444 1445 1446
		return get_serial_info(mos7720_port,
				       (struct serial_struct __user *)arg);

	case TIOCMIWAIT:
1447
		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
		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)) ||
A
Alan Cox 已提交
1459
			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
				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;

1481
		dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
A
Alan Cox 已提交
1482
		    port->number, icount.rx, icount.tx);
1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
		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;

1499
	dbg("%s: Entering ..........", __func__);
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510

	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) {
1511
		dev_err(&dev->dev, "%s - Out of memory\n", __func__);
1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523
		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) {
1524
			dev_err(&dev->dev, "%s - Out of memory\n", __func__);
1525 1526 1527 1528 1529 1530 1531 1532
			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 */
A
Alan Cox 已提交
1533 1534
		serial->port[i]->interrupt_in_endpointAddress =
				serial->port[0]->interrupt_in_endpointAddress;
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545

		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),
A
Alan Cox 已提交
1546
			(__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5*HZ);
1547

A
Alan Cox 已提交
1548 1549 1550
	/* LSR For Port 1 */
	send_mos_cmd(serial, MOS_READ, 0x00, UART_LSR, &data);
	dbg("LSR:%x", data);
1551

A
Alan Cox 已提交
1552 1553 1554
	/* LSR For Port 2 */
	send_mos_cmd(serial, MOS_READ, 0x01, UART_LSR, &data);
	dbg("LSR:%x", data);
1555 1556 1557 1558

	return 0;
}

1559
static void mos7720_release(struct usb_serial *serial)
1560 1561 1562 1563
{
	int i;

	/* free private structure allocated for serial port */
1564
	for (i = 0; i < serial->num_ports; ++i)
1565 1566 1567 1568 1569 1570
		kfree(usb_get_serial_port_data(serial->port[i]));

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

1571 1572 1573 1574 1575 1576 1577 1578
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,
};

1579 1580 1581 1582 1583 1584
static struct usb_serial_driver moschip7720_2port_driver = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"moschip7720",
	},
	.description		= "Moschip 2 port adapter",
1585
	.usb_driver		= &usb_driver,
1586 1587 1588 1589 1590 1591 1592
	.id_table		= moschip_port_id_table,
	.num_ports		= 2,
	.open			= mos7720_open,
	.close			= mos7720_close,
	.throttle		= mos7720_throttle,
	.unthrottle		= mos7720_unthrottle,
	.attach			= mos7720_startup,
1593
	.release		= mos7720_release,
1594
	.ioctl			= mos7720_ioctl,
1595 1596
	.tiocmget		= mos7720_tiocmget,
	.tiocmset		= mos7720_tiocmset,
1597 1598 1599 1600 1601 1602
	.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,
1603
	.read_int_callback	= mos7720_interrupt_callback,
1604 1605 1606 1607 1608 1609
};

static int __init moschip7720_init(void)
{
	int retval;

1610
	dbg("%s: Entering ..........", __func__);
1611 1612 1613 1614 1615 1616

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

1617 1618
	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
	       DRIVER_DESC "\n");
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643

	/* 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 */
A
Alan Cox 已提交
1644 1645
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
1646 1647 1648 1649
MODULE_LICENSE("GPL");

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