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Subject[PATCH v4 4/7] usb: serial: reimplement RX bulk-in ep for F81232
Date
The F81232 bulk-in is RX data channel. Data format is
[LSR+Data][LSR+Data]..... , We had reimplemented in this patch.

Signed-off-by: Peter Hung <hpeter+linux_kernel@gmail.com>
---
drivers/usb/serial/f81232.c | 47 +++++++++++++++------------------------------
1 file changed, 15 insertions(+), 32 deletions(-)

diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 274120d..12e1ae4 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -194,47 +194,30 @@ 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;
+ u8 line_status = 0;
int i;

- /* update line status */
- spin_lock_irqsave(&priv->lock, flags);
- line_status = priv->line_status;
- priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
- spin_unlock_irqrestore(&priv->lock, flags);
-
if (!urb->actual_length)
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);
-
- /* overrun is special, not associated with a char */
- if (line_status & UART_OVERRUN_ERROR)
- tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
-
- 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);
+ /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
+
+ if (urb->actual_length >= 2) {
+
+ for (i = 0 ; i < urb->actual_length ; i += 2) {
+ line_status |= data[i+0];
+ tty_insert_flip_string_fixed_flag(&port->port,
+ &data[i+1], tty_flag, 1);
+ }
+
+ if (unlikely(line_status & UART_LSR_OE))
+ tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
+
+ tty_flip_buffer_push(&port->port);
}

- tty_flip_buffer_push(&port->port);
}

static int set_control_lines(struct usb_device *dev, u8 value)
--
1.9.1


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