![Johannes Hölzl](/assets/img/avatar_default.png)
Every usb serial driver should have a pointer to the corresponding usb driver. So the usb serial core can add a new id not only to the usb serial driver, but also to the usb driver. Also the usb drivers of ark3116, mos7720 and mos7840 missed the flag no_dynamic_id=1. This is added now. Signed-off-by: Johannes Hölzl <johannes.hoelzl@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1686 lines
42 KiB
C
1686 lines
42 KiB
C
/*
|
|
* 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:
|
|
* VijayaKumar.G.N. <vijaykumar@aspirecom.net>
|
|
* AjayKumar <ajay@aspirecom.net>
|
|
* Gurudeva.N. <gurudev@aspirecom.net>
|
|
*
|
|
* Cleaned up from the original by:
|
|
* Greg Kroah-Hartman <gregkh@suse.de>
|
|
*
|
|
* Originally based on drivers/usb/serial/io_edgeport.c which is:
|
|
* Copyright (C) 2000 Inside Out Networks, All rights reserved.
|
|
* Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_driver.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/serial.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
|
|
/*
|
|
* Version Information
|
|
*/
|
|
#define DRIVER_VERSION "1.0.0.4F"
|
|
#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
|
|
#define DRIVER_DESC "Moschip USB Serial Driver"
|
|
|
|
/* default urb timeout */
|
|
#define MOS_WDR_TIMEOUT (HZ * 5)
|
|
|
|
#define MOS_PORT1 0x0200
|
|
#define MOS_PORT2 0x0300
|
|
#define MOS_VENREG 0x0000
|
|
#define MOS_MAX_PORT 0x02
|
|
#define MOS_WRITE 0x0E
|
|
#define MOS_READ 0x0D
|
|
|
|
/* Interrupt Rotinue Defines */
|
|
#define SERIAL_IIR_RLS 0x06
|
|
#define SERIAL_IIR_RDA 0x04
|
|
#define SERIAL_IIR_CTI 0x0c
|
|
#define SERIAL_IIR_THR 0x02
|
|
#define SERIAL_IIR_MS 0x00
|
|
|
|
#define NUM_URBS 16 /* URB Count */
|
|
#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
|
|
|
|
/* This structure holds all of the local port information */
|
|
struct moschip_port
|
|
{
|
|
__u8 shadowLCR; /* last LCR value received */
|
|
__u8 shadowMCR; /* last MCR value received */
|
|
__u8 shadowMSR; /* last MSR value received */
|
|
char open;
|
|
struct async_icount icount;
|
|
struct usb_serial_port *port; /* loop back to the owner */
|
|
struct urb *write_urb_pool[NUM_URBS];
|
|
};
|
|
|
|
/* This structure holds all of the individual serial device information */
|
|
struct moschip_serial
|
|
{
|
|
int interrupt_started;
|
|
};
|
|
|
|
static int debug;
|
|
|
|
#define USB_VENDOR_ID_MOSCHIP 0x9710
|
|
#define MOSCHIP_DEVICE_ID_7720 0x7720
|
|
#define MOSCHIP_DEVICE_ID_7715 0x7715
|
|
|
|
static struct usb_device_id moschip_port_id_table [] = {
|
|
{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
|
|
{ } /* terminating entry */
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
|
|
|
|
|
|
/*
|
|
* mos7720_interrupt_callback
|
|
* this is the callback function for when we have received data on the
|
|
* interrupt endpoint.
|
|
*/
|
|
static void mos7720_interrupt_callback(struct urb *urb)
|
|
{
|
|
int result;
|
|
int length;
|
|
__u32 *data;
|
|
unsigned int status;
|
|
__u8 sp1;
|
|
__u8 sp2;
|
|
__u8 st;
|
|
|
|
dbg("%s"," : Entering\n");
|
|
|
|
if (!urb) {
|
|
dbg("%s","Invalid Pointer !!!!:\n");
|
|
return;
|
|
}
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dbg("%s - urb shutting down with status: %d", __FUNCTION__,
|
|
urb->status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __FUNCTION__,
|
|
urb->status);
|
|
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 */
|
|
if (length && length > 4) {
|
|
dbg("Wrong data !!!");
|
|
return;
|
|
}
|
|
|
|
status = *data;
|
|
|
|
sp1 = (status & 0xff000000)>>24;
|
|
sp2 = (status & 0x00ff0000)>>16;
|
|
st = status & 0x000000ff;
|
|
|
|
if ((sp1 & 0x01) || (sp2 & 0x01)) {
|
|
/* 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",
|
|
__FUNCTION__, result);
|
|
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)
|
|
{
|
|
int status;
|
|
unsigned char *data ;
|
|
struct usb_serial_port *port;
|
|
struct moschip_port *mos7720_port;
|
|
struct tty_struct *tty;
|
|
|
|
if (urb->status) {
|
|
dbg("nonzero read bulk status received: %d",urb->status);
|
|
return;
|
|
}
|
|
|
|
mos7720_port = urb->context;
|
|
if (!mos7720_port) {
|
|
dbg("%s","NULL mos7720_port pointer \n");
|
|
return ;
|
|
}
|
|
|
|
port = mos7720_port->port;
|
|
|
|
dbg("Entering...%s", __FUNCTION__);
|
|
|
|
data = urb->transfer_buffer;
|
|
|
|
tty = port->tty;
|
|
if (tty && urb->actual_length) {
|
|
tty_buffer_request_room(tty, urb->actual_length);
|
|
tty_insert_flip_string(tty, data, urb->actual_length);
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
|
|
if (!port->read_urb) {
|
|
dbg("URB KILLED !!!");
|
|
return;
|
|
}
|
|
|
|
if (port->read_urb->status != -EINPROGRESS) {
|
|
port->read_urb->dev = port->serial->dev;
|
|
|
|
status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
|
if (status)
|
|
dbg("usb_submit_urb(read bulk) failed, status = %d",
|
|
status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (urb->status) {
|
|
dbg("nonzero write bulk status received:%d", urb->status);
|
|
return;
|
|
}
|
|
|
|
mos7720_port = urb->context;
|
|
if (!mos7720_port) {
|
|
dbg("NULL mos7720_port pointer");
|
|
return ;
|
|
}
|
|
|
|
dbg("Entering .........");
|
|
|
|
tty = mos7720_port->port->tty;
|
|
|
|
if (tty && mos7720_port->open) {
|
|
/* let the tty driver wakeup if it has a special *
|
|
* write_wakeup function */
|
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
|
tty->ldisc.write_wakeup)
|
|
(tty->ldisc.write_wakeup)(tty);
|
|
|
|
/* tell the tty driver that something has changed */
|
|
wake_up_interruptible(&tty->write_wait);
|
|
}
|
|
|
|
/* schedule_work(&mos7720_port->port->work); */
|
|
}
|
|
|
|
/*
|
|
* send_mos_cmd
|
|
* this function will be used for sending command to device
|
|
*/
|
|
static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
|
|
__u16 index, void *data)
|
|
{
|
|
int status;
|
|
unsigned int pipe;
|
|
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
|
|
__u8 requesttype;
|
|
__u16 size = 0x0000;
|
|
|
|
if (value < MOS_MAX_PORT) {
|
|
if (product == MOSCHIP_DEVICE_ID_7715) {
|
|
value = value*0x100+0x100;
|
|
} else {
|
|
value = value*0x100+0x200;
|
|
}
|
|
} else {
|
|
value = 0x0000;
|
|
if ((product == MOSCHIP_DEVICE_ID_7715) &&
|
|
(index != 0x08)) {
|
|
dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
|
|
//index = 0x01 ;
|
|
}
|
|
}
|
|
|
|
if (request == MOS_WRITE) {
|
|
request = (__u8)MOS_WRITE;
|
|
requesttype = (__u8)0x40;
|
|
value = value + (__u16)*((unsigned char *)data);
|
|
data = NULL;
|
|
pipe = usb_sndctrlpipe(serial->dev, 0);
|
|
} else {
|
|
request = (__u8)MOS_READ;
|
|
requesttype = (__u8)0xC0;
|
|
size = 0x01;
|
|
pipe = usb_rcvctrlpipe(serial->dev,0);
|
|
}
|
|
|
|
status = usb_control_msg(serial->dev, pipe, request, requesttype,
|
|
value, index, data, size, MOS_WDR_TIMEOUT);
|
|
|
|
if (status < 0)
|
|
dbg("Command Write failed Value %x index %x\n",value,index);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int mos7720_open(struct usb_serial_port *port, struct file * filp)
|
|
{
|
|
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;
|
|
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) {
|
|
urb = usb_alloc_urb(0,GFP_ATOMIC);
|
|
mos7720_port->write_urb_pool[j] = urb;
|
|
|
|
if (urb == NULL) {
|
|
err("No more urbs???");
|
|
continue;
|
|
}
|
|
|
|
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
|
|
GFP_KERNEL);
|
|
if (!urb->transfer_buffer) {
|
|
err("%s-out of memory for urb buffers.", __FUNCTION__);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Initialize MCS7720 -- Write Init values to corresponding Registers
|
|
*
|
|
* Register Index
|
|
* 1 : IER
|
|
* 2 : FCR
|
|
* 3 : LCR
|
|
* 4 : MCR
|
|
*
|
|
* 0x08 : SP1/2 Control Reg
|
|
*/
|
|
port_number = port->number - port->serial->minor;
|
|
send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
|
|
dbg("SS::%p LSR:%x\n",mos7720_port, data);
|
|
|
|
dbg("Check:Sending Command ..........");
|
|
|
|
data = 0x02;
|
|
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
|
|
data = 0x02;
|
|
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
|
|
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
|
|
|
|
data = 0xCF;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
|
|
data = 0x03;
|
|
mos7720_port->shadowLCR = data;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
|
|
data = 0x0b;
|
|
mos7720_port->shadowMCR = data;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
|
|
data = 0x0b;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
|
|
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
|
|
|
|
/* data = 0x00;
|
|
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
|
|
data = 0x03;
|
|
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
|
|
data = 0x00;
|
|
send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
|
|
*/
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
|
|
|
|
data = data | (port->number - port->serial->minor + 1);
|
|
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
|
|
|
|
data = 0x83;
|
|
mos7720_port->shadowLCR = data;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
|
|
data = 0x0c;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
|
|
data = 0x00;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
|
|
data = 0x03;
|
|
mos7720_port->shadowLCR = data;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
|
|
data = 0x0c;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
|
|
data = 0x0c;
|
|
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
|
|
|
|
//Matrix
|
|
|
|
/* force low_latency on so that our tty_push actually forces *
|
|
* the data through,otherwise it is scheduled, and with *
|
|
* high data rates (like with OHCI) data can get lost. */
|
|
|
|
if (port->tty)
|
|
port->tty->low_latency = 1;
|
|
|
|
/* see if we've set up our endpoint info yet *
|
|
* (can't set it up in mos7720_startup as the *
|
|
* structures were not set up at that time.) */
|
|
if (!mos7720_serial->interrupt_started) {
|
|
dbg("Interrupt buffer NULL !!!");
|
|
|
|
/* not set up yet, so do it now */
|
|
mos7720_serial->interrupt_started = 1;
|
|
|
|
dbg("To Submit URB !!!");
|
|
|
|
/* set up our interrupt urb */
|
|
usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
|
|
usb_rcvintpipe(serial->dev,
|
|
port->interrupt_in_endpointAddress),
|
|
port0->interrupt_in_buffer,
|
|
port0->interrupt_in_urb->transfer_buffer_length,
|
|
mos7720_interrupt_callback, mos7720_port,
|
|
port0->interrupt_in_urb->interval);
|
|
|
|
/* start interrupt read for this mos7720 this interrupt *
|
|
* will continue as long as the mos7720 is connected */
|
|
dbg("Submit URB over !!!");
|
|
response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
|
|
if (response)
|
|
dev_err(&port->dev,
|
|
"%s - Error %d submitting control urb",
|
|
__FUNCTION__, response);
|
|
}
|
|
|
|
/* set up our bulk in urb */
|
|
usb_fill_bulk_urb(port->read_urb, serial->dev,
|
|
usb_rcvbulkpipe(serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
port->bulk_in_buffer,
|
|
port->read_urb->transfer_buffer_length,
|
|
mos7720_bulk_in_callback, mos7720_port);
|
|
response = usb_submit_urb(port->read_urb, GFP_KERNEL);
|
|
if (response)
|
|
dev_err(&port->dev,
|
|
"%s - Error %d submitting read urb", __FUNCTION__, response);
|
|
|
|
/* 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.
|
|
*/
|
|
static int mos7720_chars_in_buffer(struct usb_serial_port *port)
|
|
{
|
|
int i;
|
|
int chars = 0;
|
|
struct moschip_port *mos7720_port;
|
|
|
|
dbg("%s:entering ...........", __FUNCTION__);
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
if (mos7720_port == NULL) {
|
|
dbg("%s:leaving ...........", __FUNCTION__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
|
|
chars += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
dbg("%s - returns %d", __FUNCTION__, chars);
|
|
return chars;
|
|
}
|
|
|
|
static void mos7720_close(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 */
|
|
if (serial->dev) {
|
|
dbg("Shutdown bulk write");
|
|
usb_kill_urb(port->write_urb);
|
|
dbg("Shutdown bulk read");
|
|
usb_kill_urb(port->read_urb);
|
|
}
|
|
|
|
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);
|
|
|
|
mos7720_port->open = 0;
|
|
|
|
dbg("Leaving %s", __FUNCTION__);
|
|
}
|
|
|
|
static void mos7720_break(struct usb_serial_port *port, int break_state)
|
|
{
|
|
unsigned char data;
|
|
struct usb_serial *serial;
|
|
struct moschip_port *mos7720_port;
|
|
|
|
dbg("Entering %s", __FUNCTION__);
|
|
|
|
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 usb_serial_port *port)
|
|
{
|
|
struct moschip_port *mos7720_port;
|
|
int room = 0;
|
|
int i;
|
|
|
|
dbg("%s:entering ...........", __FUNCTION__);
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
if (mos7720_port == NULL) {
|
|
dbg("%s:leaving ...........", __FUNCTION__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
|
|
room += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
|
|
dbg("%s - returns %d", __FUNCTION__, room);
|
|
return room;
|
|
}
|
|
|
|
static int mos7720_write(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 ...........", __FUNCTION__);
|
|
|
|
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]->status != -EINPROGRESS) {
|
|
urb = mos7720_port->write_urb_pool[i];
|
|
dbg("URB:%d",i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (urb == NULL) {
|
|
dbg("%s - no more free urbs", __FUNCTION__);
|
|
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...", __FUNCTION__);
|
|
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, __FUNCTION__, 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",
|
|
__FUNCTION__, status);
|
|
bytes_sent = status;
|
|
goto exit;
|
|
}
|
|
bytes_sent = transfer_size;
|
|
|
|
exit:
|
|
return bytes_sent;
|
|
}
|
|
|
|
static void mos7720_throttle(struct usb_serial_port *port)
|
|
{
|
|
struct moschip_port *mos7720_port;
|
|
struct tty_struct *tty;
|
|
int status;
|
|
|
|
dbg("%s- port %d\n", __FUNCTION__, 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 ..........", __FUNCTION__);
|
|
|
|
tty = port->tty;
|
|
if (!tty) {
|
|
dbg("%s - no tty available", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* if we are implementing XON/XOFF, send the stop character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char stop_char = STOP_CHAR(tty);
|
|
status = mos7720_write(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 usb_serial_port *port)
|
|
{
|
|
struct tty_struct *tty;
|
|
int status;
|
|
struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
|
|
|
|
if (mos7720_port == NULL)
|
|
return;
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("%s - port not opened", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s: Entering ..........", __FUNCTION__);
|
|
|
|
tty = port->tty;
|
|
if (!tty) {
|
|
dbg("%s - no tty available", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* if we are implementing XON/XOFF, send the start character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char start_char = START_CHAR(tty);
|
|
status = mos7720_write(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", __FUNCTION__, 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 ..........", __FUNCTION__);
|
|
|
|
number = port->number - port->serial->minor;
|
|
dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate);
|
|
|
|
/* Calculate the Divisor */
|
|
status = calc_baud_rate_divisor(baudrate, &divisor);
|
|
if (status) {
|
|
err("%s - bad baud rate", __FUNCTION__);
|
|
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 moschip_port *mos7720_port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct usb_serial_port *port;
|
|
struct usb_serial *serial;
|
|
struct tty_struct *tty;
|
|
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", __FUNCTION__, port->number);
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("%s - port not opened", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
tty = mos7720_port->port->tty;
|
|
|
|
if ((!tty) || (!tty->termios)) {
|
|
dbg("%s - no tty structures", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s: Entering ..........", __FUNCTION__);
|
|
|
|
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", __FUNCTION__);
|
|
} else {
|
|
lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
|
|
dbg("%s - parity = even", __FUNCTION__);
|
|
}
|
|
|
|
} else {
|
|
dbg("%s - parity = none", __FUNCTION__);
|
|
}
|
|
|
|
if (cflag & CMSPAR)
|
|
lParity = lParity | 0x20;
|
|
|
|
/* Change the Stop bit */
|
|
if (cflag & CSTOPB) {
|
|
lStop = UART_LCR_STOP;
|
|
dbg("%s - stop bits = 2", __FUNCTION__);
|
|
} else {
|
|
lStop = 0x00;
|
|
dbg("%s - stop bits = 1", __FUNCTION__);
|
|
}
|
|
|
|
#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", __FUNCTION__, baud);
|
|
status = send_cmd_write_baud_rate(mos7720_port, 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 usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
int status;
|
|
unsigned int cflag;
|
|
struct usb_serial *serial;
|
|
struct moschip_port *mos7720_port;
|
|
struct tty_struct *tty;
|
|
|
|
serial = port->serial;
|
|
|
|
mos7720_port = usb_get_serial_port_data(port);
|
|
|
|
if (mos7720_port == NULL)
|
|
return;
|
|
|
|
tty = port->tty;
|
|
|
|
if (!port->tty || !port->tty->termios) {
|
|
dbg("%s - no tty or termios", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
if (!mos7720_port->open) {
|
|
dbg("%s - port not opened", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s\n","setting termios - ASPIRE");
|
|
|
|
cflag = tty->termios->c_cflag;
|
|
|
|
if (!cflag) {
|
|
printk("%s %s\n",__FUNCTION__,"cflag is NULL");
|
|
return;
|
|
}
|
|
|
|
/* check that they really want us to change something */
|
|
if (old_termios) {
|
|
if ((cflag == old_termios->c_cflag) &&
|
|
(RELEVANT_IFLAG(tty->termios->c_iflag) ==
|
|
RELEVANT_IFLAG(old_termios->c_iflag))) {
|
|
dbg("Nothing to change");
|
|
return;
|
|
}
|
|
}
|
|
|
|
dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
|
|
tty->termios->c_cflag,
|
|
RELEVANT_IFLAG(tty->termios->c_iflag));
|
|
|
|
if (old_termios)
|
|
dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
|
|
old_termios->c_cflag,
|
|
RELEVANT_IFLAG(old_termios->c_iflag));
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
/* change the port settings to the new ones specified */
|
|
change_port_settings(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 moschip_port *mos7720_port,
|
|
unsigned int __user *value)
|
|
{
|
|
int count;
|
|
unsigned int result = 0;
|
|
|
|
count = mos7720_chars_in_buffer(mos7720_port->port);
|
|
if (count == 0) {
|
|
dbg("%s -- Empty", __FUNCTION__);
|
|
result = TIOCSER_TEMT;
|
|
}
|
|
|
|
if (copy_to_user(value, &result, sizeof(int)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* get_number_bytes_avail - get number of bytes available
|
|
*
|
|
* Purpose: Let user call ioctl to get the count of number of bytes available.
|
|
*/
|
|
static int get_number_bytes_avail(struct moschip_port *mos7720_port,
|
|
unsigned int __user *value)
|
|
{
|
|
unsigned int result = 0;
|
|
struct tty_struct *tty = mos7720_port->port->tty;
|
|
|
|
if (!tty)
|
|
return -ENOIOCTLCMD;
|
|
|
|
result = tty->read_cnt;
|
|
|
|
dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result);
|
|
if (copy_to_user(value, &result, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
|
|
unsigned int __user *value)
|
|
{
|
|
unsigned int mcr ;
|
|
unsigned int arg;
|
|
unsigned char data;
|
|
|
|
struct usb_serial_port *port;
|
|
|
|
if (mos7720_port == NULL)
|
|
return -1;
|
|
|
|
port = (struct usb_serial_port*)mos7720_port->port;
|
|
mcr = mos7720_port->shadowMCR;
|
|
|
|
if (copy_from_user(&arg, value, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
switch (cmd) {
|
|
case TIOCMBIS:
|
|
if (arg & TIOCM_RTS)
|
|
mcr |= UART_MCR_RTS;
|
|
if (arg & TIOCM_DTR)
|
|
mcr |= UART_MCR_RTS;
|
|
if (arg & TIOCM_LOOP)
|
|
mcr |= UART_MCR_LOOP;
|
|
break;
|
|
|
|
case TIOCMBIC:
|
|
if (arg & TIOCM_RTS)
|
|
mcr &= ~UART_MCR_RTS;
|
|
if (arg & TIOCM_DTR)
|
|
mcr &= ~UART_MCR_RTS;
|
|
if (arg & TIOCM_LOOP)
|
|
mcr &= ~UART_MCR_LOOP;
|
|
break;
|
|
|
|
case TIOCMSET:
|
|
/* turn off the RTS and DTR and LOOPBACK
|
|
* and then only turn on what was asked to */
|
|
mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
|
|
mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
|
|
mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
|
|
mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
|
|
break;
|
|
}
|
|
|
|
mos7720_port->shadowMCR = mcr;
|
|
|
|
data = mos7720_port->shadowMCR;
|
|
send_mos_cmd(port->serial, MOS_WRITE,
|
|
port->number - port->serial->minor, UART_MCR, &data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_modem_info(struct moschip_port *mos7720_port,
|
|
unsigned int __user *value)
|
|
{
|
|
unsigned int result = 0;
|
|
unsigned int msr = mos7720_port->shadowMSR;
|
|
unsigned int mcr = mos7720_port->shadowMCR;
|
|
|
|
result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
|
|
| ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
|
|
| ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
|
|
| ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
|
|
| ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
|
|
| ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
|
|
|
|
|
|
dbg("%s -- %x", __FUNCTION__, 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 usb_serial_port *port, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
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", __FUNCTION__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCINQ:
|
|
/* return number of bytes available */
|
|
dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
|
|
return get_number_bytes_avail(mos7720_port,
|
|
(unsigned int __user *)arg);
|
|
break;
|
|
|
|
case TIOCSERGETLSR:
|
|
dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
|
|
return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
|
|
return 0;
|
|
|
|
case TIOCMBIS:
|
|
case TIOCMBIC:
|
|
case TIOCMSET:
|
|
dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
|
|
port->number);
|
|
return set_modem_info(mos7720_port, cmd,
|
|
(unsigned int __user *)arg);
|
|
|
|
case TIOCMGET:
|
|
dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
|
|
return get_modem_info(mos7720_port,
|
|
(unsigned int __user *)arg);
|
|
|
|
case TIOCGSERIAL:
|
|
dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
|
|
return get_serial_info(mos7720_port,
|
|
(struct serial_struct __user *)arg);
|
|
|
|
case TIOCSSERIAL:
|
|
dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
|
|
break;
|
|
|
|
case TIOCMIWAIT:
|
|
dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, 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", __FUNCTION__,
|
|
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 ..........", __FUNCTION__);
|
|
|
|
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", __FUNCTION__);
|
|
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", __FUNCTION__);
|
|
usb_set_serial_data(serial, NULL);
|
|
kfree(mos7720_serial);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Initialize all port interrupt end point to port 0 int
|
|
* endpoint. Our device has only one interrupt endpoint
|
|
* comman to all ports */
|
|
serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
|
|
|
|
mos7720_port->port = serial->port[i];
|
|
usb_set_serial_port_data(serial->port[i], mos7720_port);
|
|
|
|
dbg("port number is %d", serial->port[i]->number);
|
|
dbg("serial number is %d", serial->minor);
|
|
}
|
|
|
|
|
|
/* setting configuration feature to one */
|
|
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
(__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
|
|
|
|
send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
|
|
dbg("LSR:%x",data);
|
|
|
|
send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
|
|
dbg("LSR:%x",data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mos7720_shutdown(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
|
|
/* free private structure allocated for serial port */
|
|
for (i=0; i < serial->num_ports; ++i) {
|
|
kfree(usb_get_serial_port_data(serial->port[i]));
|
|
usb_set_serial_port_data(serial->port[i], NULL);
|
|
}
|
|
|
|
/* free private structure allocated for serial device */
|
|
kfree(usb_get_serial_data(serial));
|
|
usb_set_serial_data(serial, NULL);
|
|
}
|
|
|
|
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_interrupt_in = 1,
|
|
.num_bulk_in = 2,
|
|
.num_bulk_out = 2,
|
|
.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,
|
|
};
|
|
|
|
static int __init moschip7720_init(void)
|
|
{
|
|
int retval;
|
|
|
|
dbg("%s: Entering ..........", __FUNCTION__);
|
|
|
|
/* 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");
|