mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
75318d2d7c
It is no longer needed, so let's remove it, saving a bit of memory. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
369 lines
10 KiB
C
369 lines
10 KiB
C
/*
|
|
* USB ZyXEL omni.net LCD PLUS driver
|
|
*
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* See Documentation/usb/usb-serial.txt for more information on using this driver
|
|
*
|
|
* Please report both successes and troubles to the author at omninet@kroah.com
|
|
*
|
|
* (05/30/2001) gkh
|
|
* switched from using spinlock to a semaphore, which fixes lots of problems.
|
|
*
|
|
* (04/08/2001) gb
|
|
* Identify version on module load.
|
|
*
|
|
* (11/01/2000) Adam J. Richter
|
|
* usb_device_id table support
|
|
*
|
|
* (10/05/2000) gkh
|
|
* Fixed bug with urb->dev not being set properly, now that the usb
|
|
* core needs it.
|
|
*
|
|
* (08/28/2000) gkh
|
|
* Added locks for SMP safeness.
|
|
* Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
|
|
* than once.
|
|
* Fixed potential race in omninet_write_bulk_callback
|
|
*
|
|
* (07/19/2000) gkh
|
|
* Added module_init and module_exit functions to handle the fact that this
|
|
* driver is a loadable module now.
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#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 <asm/uaccess.h>
|
|
#include <linux/usb.h>
|
|
#include "usb-serial.h"
|
|
|
|
static int debug;
|
|
|
|
/*
|
|
* Version Information
|
|
*/
|
|
#define DRIVER_VERSION "v1.1"
|
|
#define DRIVER_AUTHOR "Alessandro Zummo"
|
|
#define DRIVER_DESC "USB ZyXEL omni.net LCD PLUS Driver"
|
|
|
|
#define ZYXEL_VENDOR_ID 0x0586
|
|
#define ZYXEL_OMNINET_ID 0x1000
|
|
#define BT_IGNITIONPRO_ID 0x2000 /* This one seems to be a re-branded ZyXEL device */
|
|
|
|
/* function prototypes */
|
|
static int omninet_open (struct usb_serial_port *port, struct file *filp);
|
|
static void omninet_close (struct usb_serial_port *port, struct file *filp);
|
|
static void omninet_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
|
|
static void omninet_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
|
|
static int omninet_write (struct usb_serial_port *port, const unsigned char *buf, int count);
|
|
static int omninet_write_room (struct usb_serial_port *port);
|
|
static void omninet_shutdown (struct usb_serial *serial);
|
|
|
|
static struct usb_device_id id_table [] = {
|
|
{ USB_DEVICE(ZYXEL_VENDOR_ID, ZYXEL_OMNINET_ID) },
|
|
{ USB_DEVICE(ZYXEL_VENDOR_ID, BT_IGNITIONPRO_ID) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE (usb, id_table);
|
|
|
|
static struct usb_driver omninet_driver = {
|
|
.name = "omninet",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.id_table = id_table,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
|
|
static struct usb_serial_driver zyxel_omninet_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "omninet",
|
|
},
|
|
.description = "ZyXEL - omni.net lcd plus usb",
|
|
.id_table = id_table,
|
|
.num_interrupt_in = 1,
|
|
.num_bulk_in = 1,
|
|
.num_bulk_out = 2,
|
|
.num_ports = 1,
|
|
.open = omninet_open,
|
|
.close = omninet_close,
|
|
.write = omninet_write,
|
|
.write_room = omninet_write_room,
|
|
.read_bulk_callback = omninet_read_bulk_callback,
|
|
.write_bulk_callback = omninet_write_bulk_callback,
|
|
.shutdown = omninet_shutdown,
|
|
};
|
|
|
|
|
|
/* The protocol.
|
|
*
|
|
* The omni.net always exchange 64 bytes of data with the host. The first
|
|
* four bytes are the control header, you can see it in the above structure.
|
|
*
|
|
* oh_seq is a sequence number. Don't know if/how it's used.
|
|
* oh_len is the length of the data bytes in the packet.
|
|
* oh_xxx Bit-mapped, related to handshaking and status info.
|
|
* I normally set it to 0x03 in trasmitted frames.
|
|
* 7: Active when the TA is in a CONNECTed state.
|
|
* 6: unknown
|
|
* 5: handshaking, unknown
|
|
* 4: handshaking, unknown
|
|
* 3: unknown, usually 0
|
|
* 2: unknown, usually 0
|
|
* 1: handshaking, unknown, usually set to 1 in trasmitted frames
|
|
* 0: handshaking, unknown, usually set to 1 in trasmitted frames
|
|
* oh_pad Probably a pad byte.
|
|
*
|
|
* After the header you will find data bytes if oh_len was greater than zero.
|
|
*
|
|
*/
|
|
|
|
struct omninet_header
|
|
{
|
|
__u8 oh_seq;
|
|
__u8 oh_len;
|
|
__u8 oh_xxx;
|
|
__u8 oh_pad;
|
|
};
|
|
|
|
struct omninet_data
|
|
{
|
|
__u8 od_outseq; // Sequence number for bulk_out URBs
|
|
};
|
|
|
|
static int omninet_open (struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct usb_serial_port *wport;
|
|
struct omninet_data *od;
|
|
int result = 0;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
od = kmalloc( sizeof(struct omninet_data), GFP_KERNEL );
|
|
if( !od ) {
|
|
err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct omninet_data));
|
|
return -ENOMEM;
|
|
}
|
|
|
|
usb_set_serial_port_data(port, od);
|
|
wport = serial->port[1];
|
|
wport->tty = port->tty;
|
|
|
|
/* Start reading from the device */
|
|
usb_fill_bulk_urb(port->read_urb, serial->dev,
|
|
usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
|
|
port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
|
|
omninet_read_bulk_callback, port);
|
|
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
|
|
if (result)
|
|
err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void omninet_close (struct usb_serial_port *port, struct file * filp)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct usb_serial_port *wport;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
wport = serial->port[1];
|
|
usb_kill_urb(wport->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
|
|
kfree(usb_get_serial_port_data(port));
|
|
}
|
|
|
|
|
|
#define OMNINET_DATAOFFSET 0x04
|
|
#define OMNINET_HEADERLEN sizeof(struct omninet_header)
|
|
#define OMNINET_BULKOUTSIZE (64 - OMNINET_HEADERLEN)
|
|
|
|
static void omninet_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
struct omninet_header *header = (struct omninet_header *) &data[0];
|
|
|
|
int i;
|
|
int result;
|
|
|
|
// dbg("omninet_read_bulk_callback");
|
|
|
|
if (urb->status) {
|
|
dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
}
|
|
|
|
if ((debug) && (header->oh_xxx != 0x30)) {
|
|
if (urb->actual_length) {
|
|
printk (KERN_DEBUG __FILE__ ": omninet_read %d: ", header->oh_len);
|
|
for (i = 0; i < (header->oh_len + OMNINET_HEADERLEN); i++) {
|
|
printk ("%.2x ", data[i]);
|
|
}
|
|
printk ("\n");
|
|
}
|
|
}
|
|
|
|
if (urb->actual_length && header->oh_len) {
|
|
for (i = 0; i < header->oh_len; i++) {
|
|
tty_insert_flip_char(port->tty, data[OMNINET_DATAOFFSET + i], 0);
|
|
}
|
|
tty_flip_buffer_push(port->tty);
|
|
}
|
|
|
|
/* Continue trying to always read */
|
|
usb_fill_bulk_urb(urb, port->serial->dev,
|
|
usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
|
|
urb->transfer_buffer, urb->transfer_buffer_length,
|
|
omninet_read_bulk_callback, port);
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result)
|
|
err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
|
|
|
|
return;
|
|
}
|
|
|
|
static int omninet_write (struct usb_serial_port *port, const unsigned char *buf, int count)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct usb_serial_port *wport = serial->port[1];
|
|
|
|
struct omninet_data *od = usb_get_serial_port_data(port);
|
|
struct omninet_header *header = (struct omninet_header *) wport->write_urb->transfer_buffer;
|
|
|
|
int result;
|
|
|
|
// dbg("omninet_write port %d", port->number);
|
|
|
|
if (count == 0) {
|
|
dbg("%s - write request of 0 bytes", __FUNCTION__);
|
|
return (0);
|
|
}
|
|
|
|
spin_lock(&port->lock);
|
|
if (port->write_urb_busy) {
|
|
spin_unlock(&port->lock);
|
|
dbg("%s - already writing", __FUNCTION__);
|
|
return 0;
|
|
}
|
|
port->write_urb_busy = 1;
|
|
spin_unlock(&port->lock);
|
|
|
|
count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
|
|
|
|
memcpy (wport->write_urb->transfer_buffer + OMNINET_DATAOFFSET, buf, count);
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, wport->write_urb->transfer_buffer);
|
|
|
|
header->oh_seq = od->od_outseq++;
|
|
header->oh_len = count;
|
|
header->oh_xxx = 0x03;
|
|
header->oh_pad = 0x00;
|
|
|
|
/* send the data out the bulk port, always 64 bytes */
|
|
wport->write_urb->transfer_buffer_length = 64;
|
|
|
|
wport->write_urb->dev = serial->dev;
|
|
result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
|
|
if (result) {
|
|
port->write_urb_busy = 0;
|
|
err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
|
|
} else
|
|
result = count;
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static int omninet_write_room (struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct usb_serial_port *wport = serial->port[1];
|
|
|
|
int room = 0; // Default: no room
|
|
|
|
if (wport->write_urb_busy)
|
|
room = wport->bulk_out_size - OMNINET_HEADERLEN;
|
|
|
|
// dbg("omninet_write_room returns %d", room);
|
|
|
|
return (room);
|
|
}
|
|
|
|
static void omninet_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
/* struct omninet_header *header = (struct omninet_header *) urb->transfer_buffer; */
|
|
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
|
|
|
|
// dbg("omninet_write_bulk_callback, port %0x\n", port);
|
|
|
|
port->write_urb_busy = 0;
|
|
if (urb->status) {
|
|
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
}
|
|
|
|
schedule_work(&port->work);
|
|
|
|
// dbg("omninet_write_bulk_callback, tty %0x\n", tty);
|
|
}
|
|
|
|
|
|
static void omninet_shutdown (struct usb_serial *serial)
|
|
{
|
|
dbg ("%s", __FUNCTION__);
|
|
}
|
|
|
|
|
|
static int __init omninet_init (void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&zyxel_omninet_device);
|
|
if (retval)
|
|
goto failed_usb_serial_register;
|
|
retval = usb_register(&omninet_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
info(DRIVER_VERSION ":" DRIVER_DESC);
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&zyxel_omninet_device);
|
|
failed_usb_serial_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit omninet_exit (void)
|
|
{
|
|
usb_deregister (&omninet_driver);
|
|
usb_serial_deregister (&zyxel_omninet_device);
|
|
}
|
|
|
|
|
|
module_init(omninet_init);
|
|
module_exit(omninet_exit);
|
|
|
|
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");
|