1620 lines
40 KiB
C
1620 lines
40 KiB
C
/*
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* mos7720.c
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* Controls the Moschip 7720 usb to dual port serial convertor
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*
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* Copyright 2006 Moschip Semiconductor Tech. Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Developed by:
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* Vijaya Kumar <vijaykumar.gn@gmail.com>
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* Ajay Kumar <naanuajay@yahoo.com>
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* Gurudeva <ngurudeva@yahoo.com>
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*
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* Cleaned up from the original by:
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* Greg Kroah-Hartman <gregkh@suse.de>
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*
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* Originally based on drivers/usb/serial/io_edgeport.c which is:
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* Copyright (C) 2000 Inside Out Networks, All rights reserved.
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* Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/uaccess.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "1.0.0.4F"
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#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
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#define DRIVER_DESC "Moschip USB Serial Driver"
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/* default urb timeout */
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#define MOS_WDR_TIMEOUT (HZ * 5)
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#define MOS_PORT1 0x0200
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#define MOS_PORT2 0x0300
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#define MOS_VENREG 0x0000
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#define MOS_MAX_PORT 0x02
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#define MOS_WRITE 0x0E
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#define MOS_READ 0x0D
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/* Interrupt Rotinue Defines */
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#define SERIAL_IIR_RLS 0x06
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#define SERIAL_IIR_RDA 0x04
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#define SERIAL_IIR_CTI 0x0c
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#define SERIAL_IIR_THR 0x02
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#define SERIAL_IIR_MS 0x00
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#define NUM_URBS 16 /* URB Count */
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#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
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/* 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 */
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__u8 shadowMCR; /* last MCR value received */
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__u8 shadowMSR; /* last MSR value received */
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char open;
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struct async_icount icount;
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struct usb_serial_port *port; /* loop back to the owner */
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struct urb *write_urb_pool[NUM_URBS];
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};
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/* This structure holds all of the individual serial device information */
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struct moschip_serial {
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int interrupt_started;
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};
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static int debug;
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#define USB_VENDOR_ID_MOSCHIP 0x9710
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#define MOSCHIP_DEVICE_ID_7720 0x7720
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#define MOSCHIP_DEVICE_ID_7715 0x7715
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static 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 */
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};
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MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
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/*
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* mos7720_interrupt_callback
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* this is the callback function for when we have received data on the
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* interrupt endpoint.
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*/
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static void mos7720_interrupt_callback(struct urb *urb)
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{
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int result;
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int length;
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int status = urb->status;
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__u8 *data;
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__u8 sp1;
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__u8 sp2;
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dbg("%s", " : Entering\n");
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switch (status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* 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;
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default:
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dbg("%s - nonzero urb status received: %d", __func__,
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status);
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goto exit;
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}
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length = urb->actual_length;
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data = urb->transfer_buffer;
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/* Moschip get 4 bytes
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* Byte 1 IIR Port 1 (port.number is 0)
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* Byte 2 IIR Port 2 (port.number is 1)
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* Byte 3 --------------
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* Byte 4 FIFO status for both */
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/* the above description is inverted
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* oneukum 2007-03-14 */
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if (unlikely(length != 4)) {
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dbg("Wrong data !!!");
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return;
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}
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sp1 = data[3];
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sp2 = data[2];
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if ((sp1 | sp2) & 0x01) {
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/* No Interrupt Pending in both the ports */
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dbg("No Interrupt !!!");
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} else {
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switch (sp1 & 0x0f) {
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case SERIAL_IIR_RLS:
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dbg("Serial Port 1: Receiver status error or address "
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"bit detected in 9-bit mode\n");
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break;
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case SERIAL_IIR_CTI:
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dbg("Serial Port 1: Receiver time out");
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break;
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case SERIAL_IIR_MS:
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dbg("Serial Port 1: Modem status change");
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break;
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}
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switch (sp2 & 0x0f) {
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case SERIAL_IIR_RLS:
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dbg("Serial Port 2: Receiver status error or address "
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"bit detected in 9-bit mode");
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break;
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case SERIAL_IIR_CTI:
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dbg("Serial Port 2: Receiver time out");
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break;
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case SERIAL_IIR_MS:
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dbg("Serial Port 2: Modem status change");
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break;
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}
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}
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exit:
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result = usb_submit_urb(urb, GFP_ATOMIC);
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if (result)
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dev_err(&urb->dev->dev,
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"%s - Error %d submitting control urb\n",
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__func__, result);
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return;
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}
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/*
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* mos7720_bulk_in_callback
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* this is the callback function for when we have received data on the
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* bulk in endpoint.
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*/
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static void mos7720_bulk_in_callback(struct urb *urb)
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{
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int retval;
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unsigned char *data ;
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struct usb_serial_port *port;
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struct moschip_port *mos7720_port;
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struct tty_struct *tty;
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int status = urb->status;
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if (status) {
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dbg("nonzero read bulk status received: %d", status);
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return;
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}
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mos7720_port = urb->context;
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if (!mos7720_port) {
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dbg("%s", "NULL mos7720_port pointer \n");
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return ;
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}
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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) {
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tty_buffer_request_room(tty, urb->actual_length);
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tty_insert_flip_string(tty, data, urb->actual_length);
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tty_flip_buffer_push(tty);
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}
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tty_kref_put(tty);
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if (!port->read_urb) {
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dbg("URB KILLED !!!");
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return;
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}
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if (port->read_urb->status != -EINPROGRESS) {
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port->read_urb->dev = port->serial->dev;
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retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
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if (retval)
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dbg("usb_submit_urb(read bulk) failed, retval = %d",
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retval);
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}
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}
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/*
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* mos7720_bulk_out_data_callback
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* this is the callback function for when we have finished sending serial
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* data on the bulk out endpoint.
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*/
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static void mos7720_bulk_out_data_callback(struct urb *urb)
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{
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struct moschip_port *mos7720_port;
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struct tty_struct *tty;
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int status = urb->status;
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if (status) {
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dbg("nonzero write bulk status received:%d", status);
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return;
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}
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mos7720_port = urb->context;
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if (!mos7720_port) {
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dbg("NULL mos7720_port pointer");
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return ;
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}
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dbg("Entering .........");
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tty = tty_port_tty_get(&mos7720_port->port->port);
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if (tty && mos7720_port->open)
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tty_wakeup(tty);
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tty_kref_put(tty);
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}
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/*
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* send_mos_cmd
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* this function will be used for sending command to device
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*/
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static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
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__u16 index, void *data)
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{
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int status;
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unsigned int pipe;
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u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
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__u8 requesttype;
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__u16 size = 0x0000;
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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;
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} else {
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value = 0x0000;
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if ((product == MOSCHIP_DEVICE_ID_7715) &&
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(index != 0x08)) {
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dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
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/* index = 0x01 ; */
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}
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}
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if (request == MOS_WRITE) {
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request = (__u8)MOS_WRITE;
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requesttype = (__u8)0x40;
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value = value + (__u16)*((unsigned char *)data);
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data = NULL;
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pipe = usb_sndctrlpipe(serial->dev, 0);
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} else {
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request = (__u8)MOS_READ;
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requesttype = (__u8)0xC0;
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size = 0x01;
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pipe = usb_rcvctrlpipe(serial->dev, 0);
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}
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status = usb_control_msg(serial->dev, pipe, request, requesttype,
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value, index, data, size, MOS_WDR_TIMEOUT);
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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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}
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static int mos7720_open(struct tty_struct *tty,
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struct usb_serial_port *port, struct file *filp)
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{
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struct usb_serial *serial;
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struct usb_serial_port *port0;
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struct urb *urb;
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struct moschip_serial *mos7720_serial;
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struct moschip_port *mos7720_port;
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int response;
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int port_number;
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char data;
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int allocated_urbs = 0;
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int j;
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serial = port->serial;
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mos7720_port = usb_get_serial_port_data(port);
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if (mos7720_port == NULL)
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return -ENODEV;
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port0 = serial->port[0];
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mos7720_serial = usb_get_serial_data(serial);
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if (mos7720_serial == NULL || port0 == NULL)
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return -ENODEV;
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usb_clear_halt(serial->dev, port->write_urb->pipe);
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usb_clear_halt(serial->dev, port->read_urb->pipe);
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/* Initialising the write urb pool */
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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;
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if (urb == NULL) {
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err("No more urbs???");
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continue;
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}
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urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
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GFP_KERNEL);
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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]);
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mos7720_port->write_urb_pool[j] = NULL;
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continue;
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}
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allocated_urbs++;
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}
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if (!allocated_urbs)
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return -ENOMEM;
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/* Initialize MCS7720 -- Write Init values to corresponding Registers
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*
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* Register Index
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* 1 : IER
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* 2 : FCR
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* 3 : LCR
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* 4 : MCR
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*
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* 0x08 : SP1/2 Control Reg
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*/
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port_number = port->number - port->serial->minor;
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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 ..........");
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data = 0x02;
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send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
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data = 0x02;
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send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
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data = 0x00;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
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data = 0x00;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
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data = 0xCF;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
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data = 0x03;
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mos7720_port->shadowLCR = data;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
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data = 0x0b;
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mos7720_port->shadowMCR = data;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
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data = 0x0b;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
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data = 0x00;
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send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
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data = 0x00;
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send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
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/* data = 0x00;
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send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
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data = 0x03;
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send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
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data = 0x00;
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send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT,
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port_number + 1, &data);
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*/
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data = 0x00;
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send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
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data = data | (port->number - port->serial->minor + 1);
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send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
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data = 0x83;
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mos7720_port->shadowLCR = data;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
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data = 0x0c;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
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data = 0x00;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
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data = 0x03;
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mos7720_port->shadowLCR = data;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
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data = 0x0c;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
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data = 0x0c;
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send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
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/* force low_latency on so that our tty_push actually forces *
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* the data through,otherwise it is scheduled, and with *
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* high data rates (like with OHCI) data can get lost. */
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if (tty)
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tty->low_latency = 1;
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/* see if we've set up our endpoint info yet *
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* (can't set it up in mos7720_startup as the *
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* structures were not set up at that time.) */
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if (!mos7720_serial->interrupt_started) {
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dbg("Interrupt buffer NULL !!!");
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|
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/* not set up yet, so do it now */
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mos7720_serial->interrupt_started = 1;
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dbg("To Submit URB !!!");
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/* set up our interrupt urb */
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usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
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usb_rcvintpipe(serial->dev,
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port->interrupt_in_endpointAddress),
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port0->interrupt_in_buffer,
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port0->interrupt_in_urb->transfer_buffer_length,
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mos7720_interrupt_callback, mos7720_port,
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port0->interrupt_in_urb->interval);
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|
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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 !!!");
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response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
|
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if (response)
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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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}
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|
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/* set up our bulk in urb */
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usb_fill_bulk_urb(port->read_urb, serial->dev,
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usb_rcvbulkpipe(serial->dev,
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port->bulk_in_endpointAddress),
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port->bulk_in_buffer,
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port->read_urb->transfer_buffer_length,
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mos7720_bulk_in_callback, mos7720_port);
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response = usb_submit_urb(port->read_urb, GFP_KERNEL);
|
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if (response)
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dev_err(&port->dev, "%s - Error %d submitting read urb\n",
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__func__, response);
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|
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/* initialize our icount structure */
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memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
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|
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/* initialize our port settings */
|
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mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
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|
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/* send a open port command */
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mos7720_port->open = 1;
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|
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return 0;
|
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}
|
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|
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/*
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* mos7720_chars_in_buffer
|
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* 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
|
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* 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
|
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* system,
|
|
* Otherwise we return a negative error number.
|
|
*/
|
|
static int mos7720_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int i;
|
|
int chars = 0;
|
|
struct moschip_port *mos7720_port;
|
|
|
|
dbg("%s:entering ...........", __func__);
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
if (mos7720_port == NULL) {
|
|
dbg("%s:leaving ...........", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (mos7720_port->write_urb_pool[i] &&
|
|
mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
|
|
chars += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
dbg("%s - returns %d", __func__, chars);
|
|
return chars;
|
|
}
|
|
|
|
static void mos7720_close(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
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 *
|
|
* 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);
|
|
}
|
|
mutex_unlock(&serial->disc_mutex);
|
|
mos7720_port->open = 0;
|
|
|
|
dbg("Leaving %s", __func__);
|
|
}
|
|
|
|
static void mos7720_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned char data;
|
|
struct usb_serial *serial;
|
|
struct moschip_port *mos7720_port;
|
|
|
|
dbg("Entering %s", __func__);
|
|
|
|
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.
|
|
*/
|
|
static int mos7720_write_room(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7720_port;
|
|
int room = 0;
|
|
int i;
|
|
|
|
dbg("%s:entering ...........", __func__);
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
if (mos7720_port == NULL) {
|
|
dbg("%s:leaving ...........", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* FIXME: Locking */
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (mos7720_port->write_urb_pool[i] &&
|
|
mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
|
|
room += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
|
|
dbg("%s - returns %d", __func__, room);
|
|
return room;
|
|
}
|
|
|
|
static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port,
|
|
const unsigned char *data, int count)
|
|
{
|
|
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;
|
|
|
|
dbg("%s:entering ...........", __func__);
|
|
|
|
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) {
|
|
if (mos7720_port->write_urb_pool[i] &&
|
|
mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
|
|
urb = mos7720_port->write_urb_pool[i];
|
|
dbg("URB:%d", i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (urb == NULL) {
|
|
dbg("%s - no more free urbs", __func__);
|
|
goto exit;
|
|
}
|
|
|
|
if (urb->transfer_buffer == NULL) {
|
|
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
|
|
GFP_KERNEL);
|
|
if (urb->transfer_buffer == NULL) {
|
|
err("%s no more kernel memory...", __func__);
|
|
goto exit;
|
|
}
|
|
}
|
|
transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
|
|
|
|
memcpy(urb->transfer_buffer, current_position, transfer_size);
|
|
usb_serial_debug_data(debug, &port->dev, __func__, transfer_size,
|
|
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",
|
|
__func__, status);
|
|
bytes_sent = status;
|
|
goto exit;
|
|
}
|
|
bytes_sent = transfer_size;
|
|
|
|
exit:
|
|
return bytes_sent;
|
|
}
|
|
|
|
static void mos7720_throttle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7720_port;
|
|
int status;
|
|
|
|
dbg("%s- port %d\n", __func__, port->number);
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
|
|
if (mos7720_port == NULL)
|
|
return;
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("port not opened");
|
|
return;
|
|
}
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
/* if we are implementing XON/XOFF, send the stop character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char stop_char = STOP_CHAR(tty);
|
|
status = mos7720_write(tty, port, &stop_char, 1);
|
|
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 void mos7720_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
|
|
int status;
|
|
|
|
if (mos7720_port == NULL)
|
|
return;
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
/* if we are implementing XON/XOFF, send the start character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char start_char = START_CHAR(tty);
|
|
status = mos7720_write(tty, port, &start_char, 1);
|
|
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;
|
|
|
|
|
|
dbg("%s - %d", __func__, baudrate);
|
|
|
|
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;
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
number = port->number - port->serial->minor;
|
|
dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate);
|
|
|
|
/* Calculate the Divisor */
|
|
status = calc_baud_rate_divisor(baudrate, &divisor);
|
|
if (status) {
|
|
err("%s - bad baud rate", __func__);
|
|
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.
|
|
*/
|
|
static void change_port_settings(struct tty_struct *tty,
|
|
struct moschip_port *mos7720_port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
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;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
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;
|
|
dbg("%s - parity = odd", __func__);
|
|
} else {
|
|
lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
|
|
dbg("%s - parity = even", __func__);
|
|
}
|
|
|
|
} else {
|
|
dbg("%s - parity = none", __func__);
|
|
}
|
|
|
|
if (cflag & CMSPAR)
|
|
lParity = lParity | 0x20;
|
|
|
|
/* Change the Stop bit */
|
|
if (cflag & CSTOPB) {
|
|
lStop = UART_LCR_STOP;
|
|
dbg("%s - stop bits = 2", __func__);
|
|
} else {
|
|
lStop = 0x00;
|
|
dbg("%s - stop bits = 1", __func__);
|
|
}
|
|
|
|
#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;
|
|
}
|
|
|
|
dbg("%s - baud rate = %d", __func__, baud);
|
|
status = send_cmd_write_baud_rate(mos7720_port, baud);
|
|
/* FIXME: needs to write actual resulting baud back not just
|
|
blindly do so */
|
|
if (cflag & CBAUD)
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
/* 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.
|
|
*/
|
|
static void mos7720_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
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) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s\n", "setting termios - ASPIRE");
|
|
|
|
cflag = tty->termios->c_cflag;
|
|
|
|
dbg("%s - cflag %08x iflag %08x", __func__,
|
|
tty->termios->c_cflag,
|
|
RELEVANT_IFLAG(tty->termios->c_iflag));
|
|
|
|
dbg("%s - old cflag %08x old iflag %08x", __func__,
|
|
old_termios->c_cflag,
|
|
RELEVANT_IFLAG(old_termios->c_iflag));
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
/* change the port settings to the new ones specified */
|
|
change_port_settings(tty, mos7720_port, old_termios);
|
|
|
|
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.
|
|
*/
|
|
static int get_lsr_info(struct tty_struct *tty,
|
|
struct moschip_port *mos7720_port, unsigned int __user *value)
|
|
{
|
|
int count;
|
|
unsigned int result = 0;
|
|
|
|
count = mos7720_chars_in_buffer(tty);
|
|
if (count == 0) {
|
|
dbg("%s -- Empty", __func__);
|
|
result = TIOCSER_TEMT;
|
|
}
|
|
|
|
if (copy_to_user(value, &result, sizeof(int)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
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 */
|
|
|
|
|
|
dbg("%s -- %x", __func__, result);
|
|
|
|
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;
|
|
}
|
|
|
|
static int mos7720_ioctl(struct tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
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;
|
|
|
|
dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCSERGETLSR:
|
|
dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
|
|
return get_lsr_info(tty, mos7720_port,
|
|
(unsigned int __user *)arg);
|
|
return 0;
|
|
|
|
/* FIXME: These should be using the mode methods */
|
|
case TIOCMBIS:
|
|
case TIOCMBIC:
|
|
case TIOCMSET:
|
|
dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET",
|
|
__func__, port->number);
|
|
return set_modem_info(mos7720_port, cmd,
|
|
(unsigned int __user *)arg);
|
|
|
|
case TIOCMGET:
|
|
dbg("%s (%d) TIOCMGET", __func__, port->number);
|
|
return get_modem_info(mos7720_port,
|
|
(unsigned int __user *)arg);
|
|
|
|
case TIOCGSERIAL:
|
|
dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
|
|
return get_serial_info(mos7720_port,
|
|
(struct serial_struct __user *)arg);
|
|
|
|
case TIOCMIWAIT:
|
|
dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
|
|
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;
|
|
|
|
dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
|
|
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;
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
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) {
|
|
err("%s - Out of memory", __func__);
|
|
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) {
|
|
err("%s - Out of memory", __func__);
|
|
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);
|
|
|
|
/* LSR For Port 1 */
|
|
send_mos_cmd(serial, MOS_READ, 0x00, UART_LSR, &data);
|
|
dbg("LSR:%x", data);
|
|
|
|
/* LSR For Port 2 */
|
|
send_mos_cmd(serial, MOS_READ, 0x01, UART_LSR, &data);
|
|
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);
|
|
}
|
|
|
|
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,
|
|
};
|
|
|
|
static struct usb_serial_driver moschip7720_2port_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "moschip7720",
|
|
},
|
|
.description = "Moschip 2 port adapter",
|
|
.usb_driver = &usb_driver,
|
|
.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,
|
|
.read_int_callback = mos7720_interrupt_callback,
|
|
};
|
|
|
|
static int __init moschip7720_init(void)
|
|
{
|
|
int retval;
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
/* 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");
|