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USB: f81232: implement RX bulk-in EP

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The F81232 bulk-in is RX data + LSR channel, data format is
[LSR+Data][LSR+Data]..... , We had implemented in f81232_process_read_urb().

Signed-off-by: Peter Hung <hpeter+linux_kernel@gmail.com>
[johan: reword comment in process_read_urb ]
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Peter Hung 2015-03-17 17:48:20 +08:00 committed by Johan Hovold
parent b830d07dc3
commit 8885078949
1 changed files with 39 additions and 32 deletions
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71
drivers/usb/serial/f81232.c
View file

@ -23,6 +23,7 @@
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/serial_reg.h>
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x1934, 0x0706) },
@ -104,44 +105,50 @@ exit:
static void f81232_process_read_urb(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
struct f81232_private *priv = usb_get_serial_port_data(port);
unsigned char *data = urb->transfer_buffer;
char tty_flag = TTY_NORMAL;
unsigned long flags;
u8 line_status;
int i;
char tty_flag;
unsigned int i;
u8 lsr;
/* update line status */
spin_lock_irqsave(&priv->lock, flags);
line_status = priv->modem_status;
priv->modem_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
if (!urb->actual_length)
/*
* When opening the port we get a 1-byte packet with the current LSR,
* which we discard.
*/
if ((urb->actual_length < 2) || (urb->actual_length % 2))
return;
/* break takes precedence over parity, */
/* which takes precedence over framing errors */
if (line_status & UART_BREAK_ERROR)
tty_flag = TTY_BREAK;
else if (line_status & UART_PARITY_ERROR)
tty_flag = TTY_PARITY;
else if (line_status & UART_FRAME_ERROR)
tty_flag = TTY_FRAME;
dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
/* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
/* overrun is special, not associated with a char */
if (line_status & UART_OVERRUN_ERROR)
tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
for (i = 0; i < urb->actual_length; i += 2) {
tty_flag = TTY_NORMAL;
lsr = data[i];
if (port->port.console && port->sysrq) {
for (i = 0; i < urb->actual_length; ++i)
if (!usb_serial_handle_sysrq_char(port, data[i]))
tty_insert_flip_char(&port->port, data[i],
tty_flag);
} else {
tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
urb->actual_length);
if (lsr & UART_LSR_BRK_ERROR_BITS) {
if (lsr & UART_LSR_BI) {
tty_flag = TTY_BREAK;
port->icount.brk++;
usb_serial_handle_break(port);
} else if (lsr & UART_LSR_PE) {
tty_flag = TTY_PARITY;
port->icount.parity++;
} else if (lsr & UART_LSR_FE) {
tty_flag = TTY_FRAME;
port->icount.frame++;
}
if (lsr & UART_LSR_OE) {
port->icount.overrun++;
tty_insert_flip_char(&port->port, 0,
TTY_OVERRUN);
}
}
if (port->port.console && port->sysrq) {
if (usb_serial_handle_sysrq_char(port, data[i + 1]))
continue;
}
tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
}
tty_flip_buffer_push(&port->port);