mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Johan Hovold](/assets/img/avatar_default.png)
Export usb_serial_generic_close so that drivers can easily kill the read and write urb and make sure that the write fifo is reset. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
670 lines
17 KiB
C
670 lines
17 KiB
C
/*
|
|
* Copyright 2007, Frank A Kingswood <frank@kingswood-consulting.co.uk>
|
|
* Copyright 2007, Werner Cornelius <werner@cornelius-consult.de>
|
|
* Copyright 2009, Boris Hajduk <boris@hajduk.org>
|
|
*
|
|
* ch341.c implements a serial port driver for the Winchiphead CH341.
|
|
*
|
|
* The CH341 device can be used to implement an RS232 asynchronous
|
|
* serial port, an IEEE-1284 parallel printer port or a memory-like
|
|
* interface. In all cases the CH341 supports an I2C interface as well.
|
|
* This driver only supports the asynchronous serial interface.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/serial.h>
|
|
#include <linux/serial.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#define DEFAULT_BAUD_RATE 9600
|
|
#define DEFAULT_TIMEOUT 1000
|
|
|
|
/* flags for IO-Bits */
|
|
#define CH341_BIT_RTS (1 << 6)
|
|
#define CH341_BIT_DTR (1 << 5)
|
|
|
|
/******************************/
|
|
/* interrupt pipe definitions */
|
|
/******************************/
|
|
/* always 4 interrupt bytes */
|
|
/* first irq byte normally 0x08 */
|
|
/* second irq byte base 0x7d + below */
|
|
/* third irq byte base 0x94 + below */
|
|
/* fourth irq byte normally 0xee */
|
|
|
|
/* second interrupt byte */
|
|
#define CH341_MULT_STAT 0x04 /* multiple status since last interrupt event */
|
|
|
|
/* status returned in third interrupt answer byte, inverted in data
|
|
from irq */
|
|
#define CH341_BIT_CTS 0x01
|
|
#define CH341_BIT_DSR 0x02
|
|
#define CH341_BIT_RI 0x04
|
|
#define CH341_BIT_DCD 0x08
|
|
#define CH341_BITS_MODEM_STAT 0x0f /* all bits */
|
|
|
|
/*******************************/
|
|
/* baudrate calculation factor */
|
|
/*******************************/
|
|
#define CH341_BAUDBASE_FACTOR 1532620800
|
|
#define CH341_BAUDBASE_DIVMAX 3
|
|
|
|
/* Break support - the information used to implement this was gleaned from
|
|
* the Net/FreeBSD uchcom.c driver by Takanori Watanabe. Domo arigato.
|
|
*/
|
|
|
|
#define CH341_REQ_WRITE_REG 0x9A
|
|
#define CH341_REQ_READ_REG 0x95
|
|
#define CH341_REG_BREAK1 0x05
|
|
#define CH341_REG_BREAK2 0x18
|
|
#define CH341_NBREAK_BITS_REG1 0x01
|
|
#define CH341_NBREAK_BITS_REG2 0x40
|
|
|
|
|
|
static int debug;
|
|
|
|
static const struct usb_device_id id_table[] = {
|
|
{ USB_DEVICE(0x4348, 0x5523) },
|
|
{ USB_DEVICE(0x1a86, 0x7523) },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
|
|
|
struct ch341_private {
|
|
spinlock_t lock; /* access lock */
|
|
wait_queue_head_t delta_msr_wait; /* wait queue for modem status */
|
|
unsigned baud_rate; /* set baud rate */
|
|
u8 line_control; /* set line control value RTS/DTR */
|
|
u8 line_status; /* active status of modem control inputs */
|
|
u8 multi_status_change; /* status changed multiple since last call */
|
|
};
|
|
|
|
static int ch341_control_out(struct usb_device *dev, u8 request,
|
|
u16 value, u16 index)
|
|
{
|
|
int r;
|
|
dbg("ch341_control_out(%02x,%02x,%04x,%04x)", USB_DIR_OUT|0x40,
|
|
(int)request, (int)value, (int)index);
|
|
|
|
r = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
|
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
|
|
value, index, NULL, 0, DEFAULT_TIMEOUT);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int ch341_control_in(struct usb_device *dev,
|
|
u8 request, u16 value, u16 index,
|
|
char *buf, unsigned bufsize)
|
|
{
|
|
int r;
|
|
dbg("ch341_control_in(%02x,%02x,%04x,%04x,%p,%u)", USB_DIR_IN|0x40,
|
|
(int)request, (int)value, (int)index, buf, (int)bufsize);
|
|
|
|
r = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
|
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
|
|
value, index, buf, bufsize, DEFAULT_TIMEOUT);
|
|
return r;
|
|
}
|
|
|
|
static int ch341_set_baudrate(struct usb_device *dev,
|
|
struct ch341_private *priv)
|
|
{
|
|
short a, b;
|
|
int r;
|
|
unsigned long factor;
|
|
short divisor;
|
|
|
|
dbg("ch341_set_baudrate(%d)", priv->baud_rate);
|
|
|
|
if (!priv->baud_rate)
|
|
return -EINVAL;
|
|
factor = (CH341_BAUDBASE_FACTOR / priv->baud_rate);
|
|
divisor = CH341_BAUDBASE_DIVMAX;
|
|
|
|
while ((factor > 0xfff0) && divisor) {
|
|
factor >>= 3;
|
|
divisor--;
|
|
}
|
|
|
|
if (factor > 0xfff0)
|
|
return -EINVAL;
|
|
|
|
factor = 0x10000 - factor;
|
|
a = (factor & 0xff00) | divisor;
|
|
b = factor & 0xff;
|
|
|
|
r = ch341_control_out(dev, 0x9a, 0x1312, a);
|
|
if (!r)
|
|
r = ch341_control_out(dev, 0x9a, 0x0f2c, b);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int ch341_set_handshake(struct usb_device *dev, u8 control)
|
|
{
|
|
dbg("ch341_set_handshake(0x%02x)", control);
|
|
return ch341_control_out(dev, 0xa4, ~control, 0);
|
|
}
|
|
|
|
static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv)
|
|
{
|
|
char *buffer;
|
|
int r;
|
|
const unsigned size = 8;
|
|
unsigned long flags;
|
|
|
|
dbg("ch341_get_status()");
|
|
|
|
buffer = kmalloc(size, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
r = ch341_control_in(dev, 0x95, 0x0706, 0, buffer, size);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
/* setup the private status if available */
|
|
if (r == 2) {
|
|
r = 0;
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_status = (~(*buffer)) & CH341_BITS_MODEM_STAT;
|
|
priv->multi_status_change = 0;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
} else
|
|
r = -EPROTO;
|
|
|
|
out: kfree(buffer);
|
|
return r;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------- */
|
|
|
|
static int ch341_configure(struct usb_device *dev, struct ch341_private *priv)
|
|
{
|
|
char *buffer;
|
|
int r;
|
|
const unsigned size = 8;
|
|
|
|
dbg("ch341_configure()");
|
|
|
|
buffer = kmalloc(size, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
/* expect two bytes 0x27 0x00 */
|
|
r = ch341_control_in(dev, 0x5f, 0, 0, buffer, size);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_control_out(dev, 0xa1, 0, 0);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_set_baudrate(dev, priv);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
/* expect two bytes 0x56 0x00 */
|
|
r = ch341_control_in(dev, 0x95, 0x2518, 0, buffer, size);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_control_out(dev, 0x9a, 0x2518, 0x0050);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
/* expect 0xff 0xee */
|
|
r = ch341_get_status(dev, priv);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_control_out(dev, 0xa1, 0x501f, 0xd90a);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_set_baudrate(dev, priv);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = ch341_set_handshake(dev, priv->line_control);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
/* expect 0x9f 0xee */
|
|
r = ch341_get_status(dev, priv);
|
|
|
|
out: kfree(buffer);
|
|
return r;
|
|
}
|
|
|
|
/* allocate private data */
|
|
static int ch341_attach(struct usb_serial *serial)
|
|
{
|
|
struct ch341_private *priv;
|
|
int r;
|
|
|
|
dbg("ch341_attach()");
|
|
|
|
/* private data */
|
|
priv = kzalloc(sizeof(struct ch341_private), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&priv->lock);
|
|
init_waitqueue_head(&priv->delta_msr_wait);
|
|
priv->baud_rate = DEFAULT_BAUD_RATE;
|
|
priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR;
|
|
|
|
r = ch341_configure(serial->dev, priv);
|
|
if (r < 0)
|
|
goto error;
|
|
|
|
usb_set_serial_port_data(serial->port[0], priv);
|
|
return 0;
|
|
|
|
error: kfree(priv);
|
|
return r;
|
|
}
|
|
|
|
static int ch341_carrier_raised(struct usb_serial_port *port)
|
|
{
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
if (priv->line_status & CH341_BIT_DCD)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void ch341_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
/* drop DTR and RTS */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (on)
|
|
priv->line_control |= CH341_BIT_RTS | CH341_BIT_DTR;
|
|
else
|
|
priv->line_control &= ~(CH341_BIT_RTS | CH341_BIT_DTR);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ch341_set_handshake(port->serial->dev, priv->line_control);
|
|
wake_up_interruptible(&priv->delta_msr_wait);
|
|
}
|
|
|
|
static void ch341_close(struct usb_serial_port *port)
|
|
{
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
usb_serial_generic_close(port);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
|
|
|
|
/* open this device, set default parameters */
|
|
static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct ch341_private *priv = usb_get_serial_port_data(serial->port[0]);
|
|
int r;
|
|
|
|
dbg("ch341_open()");
|
|
|
|
priv->baud_rate = DEFAULT_BAUD_RATE;
|
|
|
|
r = ch341_configure(serial->dev, priv);
|
|
if (r)
|
|
goto out;
|
|
|
|
r = ch341_set_handshake(serial->dev, priv->line_control);
|
|
if (r)
|
|
goto out;
|
|
|
|
r = ch341_set_baudrate(serial->dev, priv);
|
|
if (r)
|
|
goto out;
|
|
|
|
dbg("%s - submitting interrupt urb", __func__);
|
|
port->interrupt_in_urb->dev = serial->dev;
|
|
r = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (r) {
|
|
dev_err(&port->dev, "%s - failed submitting interrupt urb,"
|
|
" error %d\n", __func__, r);
|
|
ch341_close(port);
|
|
return -EPROTO;
|
|
}
|
|
|
|
r = usb_serial_generic_open(tty, port);
|
|
|
|
out: return r;
|
|
}
|
|
|
|
/* Old_termios contains the original termios settings and
|
|
* tty->termios contains the new setting to be used.
|
|
*/
|
|
static void ch341_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned baud_rate;
|
|
unsigned long flags;
|
|
|
|
dbg("ch341_set_termios()");
|
|
|
|
baud_rate = tty_get_baud_rate(tty);
|
|
|
|
priv->baud_rate = baud_rate;
|
|
|
|
if (baud_rate) {
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_control |= (CH341_BIT_DTR | CH341_BIT_RTS);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
ch341_set_baudrate(port->serial->dev, priv);
|
|
} else {
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_control &= ~(CH341_BIT_DTR | CH341_BIT_RTS);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
ch341_set_handshake(port->serial->dev, priv->line_control);
|
|
|
|
/* Unimplemented:
|
|
* (cflag & CSIZE) : data bits [5, 8]
|
|
* (cflag & PARENB) : parity {NONE, EVEN, ODD}
|
|
* (cflag & CSTOPB) : stop bits [1, 2]
|
|
*/
|
|
}
|
|
|
|
static void ch341_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
const uint16_t ch341_break_reg =
|
|
CH341_REG_BREAK1 | ((uint16_t) CH341_REG_BREAK2 << 8);
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int r;
|
|
uint16_t reg_contents;
|
|
uint8_t *break_reg;
|
|
|
|
dbg("%s()", __func__);
|
|
|
|
break_reg = kmalloc(2, GFP_KERNEL);
|
|
if (!break_reg) {
|
|
dev_err(&port->dev, "%s - kmalloc failed\n", __func__);
|
|
return;
|
|
}
|
|
|
|
r = ch341_control_in(port->serial->dev, CH341_REQ_READ_REG,
|
|
ch341_break_reg, 0, break_reg, 2);
|
|
if (r < 0) {
|
|
dev_err(&port->dev, "%s - USB control read error (%d)\n",
|
|
__func__, r);
|
|
goto out;
|
|
}
|
|
dbg("%s - initial ch341 break register contents - reg1: %x, reg2: %x",
|
|
__func__, break_reg[0], break_reg[1]);
|
|
if (break_state != 0) {
|
|
dbg("%s - Enter break state requested", __func__);
|
|
break_reg[0] &= ~CH341_NBREAK_BITS_REG1;
|
|
break_reg[1] &= ~CH341_NBREAK_BITS_REG2;
|
|
} else {
|
|
dbg("%s - Leave break state requested", __func__);
|
|
break_reg[0] |= CH341_NBREAK_BITS_REG1;
|
|
break_reg[1] |= CH341_NBREAK_BITS_REG2;
|
|
}
|
|
dbg("%s - New ch341 break register contents - reg1: %x, reg2: %x",
|
|
__func__, break_reg[0], break_reg[1]);
|
|
reg_contents = get_unaligned_le16(break_reg);
|
|
r = ch341_control_out(port->serial->dev, CH341_REQ_WRITE_REG,
|
|
ch341_break_reg, reg_contents);
|
|
if (r < 0)
|
|
dev_err(&port->dev, "%s - USB control write error (%d)\n",
|
|
__func__, r);
|
|
out:
|
|
kfree(break_reg);
|
|
}
|
|
|
|
static int ch341_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 control;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (set & TIOCM_RTS)
|
|
priv->line_control |= CH341_BIT_RTS;
|
|
if (set & TIOCM_DTR)
|
|
priv->line_control |= CH341_BIT_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
priv->line_control &= ~CH341_BIT_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
priv->line_control &= ~CH341_BIT_DTR;
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
return ch341_set_handshake(port->serial->dev, control);
|
|
}
|
|
|
|
static void ch341_read_int_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
unsigned int actual_length = urb->actual_length;
|
|
int status;
|
|
|
|
dbg("%s (%d)", __func__, port->number);
|
|
|
|
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", __func__,
|
|
urb->status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __func__,
|
|
urb->status);
|
|
goto exit;
|
|
}
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __func__,
|
|
urb->actual_length, urb->transfer_buffer);
|
|
|
|
if (actual_length >= 4) {
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_status = (~(data[2])) & CH341_BITS_MODEM_STAT;
|
|
if ((data[1] & CH341_MULT_STAT))
|
|
priv->multi_status_change = 1;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
wake_up_interruptible(&priv->delta_msr_wait);
|
|
}
|
|
|
|
exit:
|
|
status = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (status)
|
|
dev_err(&urb->dev->dev,
|
|
"%s - usb_submit_urb failed with result %d\n",
|
|
__func__, status);
|
|
}
|
|
|
|
static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
|
|
{
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 prevstatus;
|
|
u8 status;
|
|
u8 changed;
|
|
u8 multi_change = 0;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
prevstatus = priv->line_status;
|
|
priv->multi_status_change = 0;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
while (!multi_change) {
|
|
interruptible_sleep_on(&priv->delta_msr_wait);
|
|
/* see if a signal did it */
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
status = priv->line_status;
|
|
multi_change = priv->multi_status_change;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
changed = prevstatus ^ status;
|
|
|
|
if (((arg & TIOCM_RNG) && (changed & CH341_BIT_RI)) ||
|
|
((arg & TIOCM_DSR) && (changed & CH341_BIT_DSR)) ||
|
|
((arg & TIOCM_CD) && (changed & CH341_BIT_DCD)) ||
|
|
((arg & TIOCM_CTS) && (changed & CH341_BIT_CTS))) {
|
|
return 0;
|
|
}
|
|
prevstatus = status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*static int ch341_ioctl(struct usb_serial_port *port, struct file *file,*/
|
|
static int ch341_ioctl(struct tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCMIWAIT:
|
|
dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
|
|
return wait_modem_info(port, arg);
|
|
|
|
default:
|
|
dbg("%s not supported = 0x%04x", __func__, cmd);
|
|
break;
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static int ch341_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct ch341_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 mcr;
|
|
u8 status;
|
|
unsigned int result;
|
|
|
|
dbg("%s (%d)", __func__, port->number);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
mcr = priv->line_control;
|
|
status = priv->line_status;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
result = ((mcr & CH341_BIT_DTR) ? TIOCM_DTR : 0)
|
|
| ((mcr & CH341_BIT_RTS) ? TIOCM_RTS : 0)
|
|
| ((status & CH341_BIT_CTS) ? TIOCM_CTS : 0)
|
|
| ((status & CH341_BIT_DSR) ? TIOCM_DSR : 0)
|
|
| ((status & CH341_BIT_RI) ? TIOCM_RI : 0)
|
|
| ((status & CH341_BIT_DCD) ? TIOCM_CD : 0);
|
|
|
|
dbg("%s - result = %x", __func__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static int ch341_reset_resume(struct usb_interface *intf)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
struct usb_serial *serial = NULL;
|
|
struct ch341_private *priv;
|
|
|
|
serial = usb_get_intfdata(intf);
|
|
priv = usb_get_serial_port_data(serial->port[0]);
|
|
|
|
/*reconfigure ch341 serial port after bus-reset*/
|
|
ch341_configure(dev, priv);
|
|
|
|
usb_serial_resume(intf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_driver ch341_driver = {
|
|
.name = "ch341",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.suspend = usb_serial_suspend,
|
|
.resume = usb_serial_resume,
|
|
.reset_resume = ch341_reset_resume,
|
|
.id_table = id_table,
|
|
.no_dynamic_id = 1,
|
|
.supports_autosuspend = 1,
|
|
};
|
|
|
|
static struct usb_serial_driver ch341_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ch341-uart",
|
|
},
|
|
.id_table = id_table,
|
|
.usb_driver = &ch341_driver,
|
|
.num_ports = 1,
|
|
.open = ch341_open,
|
|
.dtr_rts = ch341_dtr_rts,
|
|
.carrier_raised = ch341_carrier_raised,
|
|
.close = ch341_close,
|
|
.ioctl = ch341_ioctl,
|
|
.set_termios = ch341_set_termios,
|
|
.break_ctl = ch341_break_ctl,
|
|
.tiocmget = ch341_tiocmget,
|
|
.tiocmset = ch341_tiocmset,
|
|
.read_int_callback = ch341_read_int_callback,
|
|
.attach = ch341_attach,
|
|
};
|
|
|
|
static int __init ch341_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = usb_serial_register(&ch341_device);
|
|
if (retval)
|
|
return retval;
|
|
retval = usb_register(&ch341_driver);
|
|
if (retval)
|
|
usb_serial_deregister(&ch341_device);
|
|
return retval;
|
|
}
|
|
|
|
static void __exit ch341_exit(void)
|
|
{
|
|
usb_deregister(&ch341_driver);
|
|
usb_serial_deregister(&ch341_device);
|
|
}
|
|
|
|
module_init(ch341_init);
|
|
module_exit(ch341_exit);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
|
|
|
/* EOF ch341.c */
|