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USB: ark3116: reimplement read processing 

Use process_read_urb to implement read processing.

Compile-only tested.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Bart Hartgers <bart.hartgers@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2010-05-07 20:45:34 +02:00 committed by Greg Kroah-Hartman
parent 70ced221cc
commit 82b71cfdf3
1 changed files with 30 additions and 72 deletions
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102
drivers/usb/serial/ark3116.c
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@ -42,7 +42,7 @@ static int debug;
* Version information
*/
#define DRIVER_VERSION "v0.5"
#define DRIVER_VERSION "v0.6"
#define DRIVER_AUTHOR "Bart Hartgers <bart.hartgers+ark3116@gmail.com>"
#define DRIVER_DESC "USB ARK3116 serial/IrDA driver"
#define DRIVER_DEV_DESC "ARK3116 RS232/IrDA"
@ -672,87 +672,45 @@ static void ark3116_read_int_callback(struct urb *urb)
* error for the next block of data as well...
* For now, let's pretend this can't happen.
*/
static void send_to_tty(struct tty_struct *tty,
const unsigned char *chars,
size_t size, char flag)
static void ark3116_process_read_urb(struct urb *urb)
{
if (size == 0)
return;
if (flag == TTY_NORMAL) {
tty_insert_flip_string(tty, chars, size);
} else {
int i;
for (i = 0; i < size; ++i)
tty_insert_flip_char(tty, chars[i], flag);
}
}
static void ark3116_read_bulk_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct usb_serial_port *port = urb->context;
struct ark3116_private *priv = usb_get_serial_port_data(port);
const __u8 *data = urb->transfer_buffer;
int status = urb->status;
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
char tty_flag = TTY_NORMAL;
unsigned long flags;
int result;
char flag;
__u32 lsr;
switch (status) {
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__func__, status);
/* update line status */
spin_lock_irqsave(&priv->status_lock, flags);
lsr = priv->lsr;
priv->lsr &= ~UART_LSR_BRK_ERROR_BITS;
spin_unlock_irqrestore(&priv->status_lock, flags);
if (!urb->actual_length)
return;
default:
dbg("%s - nonzero urb status received: %d",
__func__, status);
break;
case 0: /* success */
spin_lock_irqsave(&priv->status_lock, flags);
lsr = priv->lsr;
/* clear error bits */
priv->lsr &= ~UART_LSR_BRK_ERROR_BITS;
spin_unlock_irqrestore(&priv->status_lock, flags);
tty = tty_port_tty_get(&port->port);
if (!tty)
return;
if (unlikely(lsr & UART_LSR_BI))
flag = TTY_BREAK;
else if (unlikely(lsr & UART_LSR_PE))
flag = TTY_PARITY;
else if (unlikely(lsr & UART_LSR_FE))
flag = TTY_FRAME;
else
flag = TTY_NORMAL;
if (lsr & UART_LSR_BRK_ERROR_BITS) {
if (lsr & UART_LSR_BI)
tty_flag = TTY_BREAK;
else if (lsr & UART_LSR_PE)
tty_flag = TTY_PARITY;
else if (lsr & UART_LSR_FE)
tty_flag = TTY_FRAME;
tty = tty_port_tty_get(&port->port);
if (tty) {
/* overrun is special, not associated with a char */
if (unlikely(lsr & UART_LSR_OE))
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
send_to_tty(tty, data, urb->actual_length, flag);
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
/* Throttle the device if requested by tty */
spin_lock_irqsave(&port->lock, flags);
port->throttled = port->throttle_req;
if (port->throttled) {
spin_unlock_irqrestore(&port->lock, flags);
return;
} else
spin_unlock_irqrestore(&port->lock, flags);
/* overrun is special, not associated with a char */
if (lsr & UART_LSR_OE)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
}
/* Continue reading from device */
result = usb_submit_urb(urb, GFP_ATOMIC);
if (result)
dev_err(&urb->dev->dev, "%s - failed resubmitting"
" read urb, error %d\n", __func__, result);
tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
urb->actual_length);
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
static struct usb_driver ark3116_driver = {
@ -782,7 +740,7 @@ static struct usb_serial_driver ark3116_device = {
.close = ark3116_close,
.break_ctl = ark3116_break_ctl,
.read_int_callback = ark3116_read_int_callback,
.read_bulk_callback = ark3116_read_bulk_callback,
.process_read_urb = ark3116_process_read_urb,
};
static int __init ark3116_init(void)