diff options
author | Johan Hovold <jhovold@gmail.com> | 2013-12-29 19:23:00 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-03 12:31:47 -0800 |
commit | ccfe8188a321f4039a7e52c8336bb4ff3ca35139 (patch) | |
tree | 07957fea4fa7be2a9b633ea3d1b818d22e166231 /drivers | |
parent | 71c671bf4cead0e801eccbed3fe790e817f6b6d4 (diff) | |
download | op-kernel-dev-ccfe8188a321f4039a7e52c8336bb4ff3ca35139.zip op-kernel-dev-ccfe8188a321f4039a7e52c8336bb4ff3ca35139.tar.gz |
USB: pl2303: clean up driver somewhat
Use u16 rather than __u16.
Fix multi-line comment style.
Remove some comments.
Remove unnecessary whitespace and add some where appropriate.
Drop DRIVER_DESC define.
Merge and simplify multi-line error message.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/usb/serial/pl2303.c | 61 |
1 files changed, 34 insertions, 27 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 6234d55..a44154a 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -12,7 +12,6 @@ * * See Documentation/usb/usb-serial.txt for more information on using this * driver - * */ #include <linux/kernel.h> @@ -32,11 +31,6 @@ #include <asm/unaligned.h> #include "pl2303.h" -/* - * Version Information - */ -#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" - static const struct usb_device_id id_table[] = { { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, @@ -146,27 +140,34 @@ struct pl2303_private { u8 line_settings[7]; }; -static int pl2303_vendor_read(__u16 value, __u16 index, +static int pl2303_vendor_read(u16 value, u16 index, struct usb_serial *serial, unsigned char *buf) { - int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + int res; + + res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, value, index, buf, 1, 100); + dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index, res, buf[0]); + return res; } -static int pl2303_vendor_write(__u16 value, __u16 index, - struct usb_serial *serial) +static int pl2303_vendor_write(u16 value, u16 index, struct usb_serial *serial) { - int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + int res; + + res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, value, index, NULL, 0, 100); + dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n", VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index, res); + return res; } @@ -215,14 +216,14 @@ static int pl2303_startup(struct usb_serial *serial) pl2303_vendor_write(2, 0x24, serial); kfree(buf); + return 0; } static void pl2303_release(struct usb_serial *serial) { - struct pl2303_serial_private *spriv; + struct pl2303_serial_private *spriv = usb_get_serial_data(serial); - spriv = usb_get_serial_data(serial); kfree(spriv); } @@ -245,9 +246,8 @@ static int pl2303_port_probe(struct usb_serial_port *port) static int pl2303_port_remove(struct usb_serial_port *port) { - struct pl2303_private *priv; + struct pl2303_private *priv = usb_get_serial_port_data(port); - priv = usb_get_serial_port_data(port); kfree(priv); return 0; @@ -261,8 +261,10 @@ static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, value, 0, NULL, 0, 100); + dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__, value, retval); + return retval; } @@ -488,13 +490,13 @@ static void pl2303_dtr_rts(struct usb_serial_port *port, int on) u8 control; spin_lock_irqsave(&priv->lock, flags); - /* Change DTR and RTS */ if (on) priv->line_control |= (CONTROL_DTR | CONTROL_RTS); else priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); control = priv->line_control; spin_unlock_irqrestore(&priv->lock, flags); + pl2303_set_control_lines(port, control); } @@ -525,8 +527,8 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); if (result) { - dev_err(&port->dev, "%s - failed submitting interrupt urb," - " error %d\n", __func__, result); + dev_err(&port->dev, "failed to submit interrupt urb: %d\n", + result); return result; } @@ -596,8 +598,10 @@ static int pl2303_tiocmget(struct tty_struct *tty) static int pl2303_carrier_raised(struct usb_serial_port *port) { struct pl2303_private *priv = usb_get_serial_port_data(port); + if (priv->line_status & UART_DCD) return 1; + return 0; } @@ -662,6 +666,7 @@ static int pl2303_ioctl(struct tty_struct *tty, default: break; } + return -ENOIOCTLCMD; } @@ -676,6 +681,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state) state = BREAK_OFF; else state = BREAK_ON; + dev_dbg(&port->dev, "%s - turning break %s\n", __func__, state == BREAK_OFF ? "off" : "on"); @@ -690,7 +696,6 @@ static void pl2303_update_line_status(struct usb_serial_port *port, unsigned char *data, unsigned int actual_length) { - struct pl2303_private *priv = usb_get_serial_port_data(port); struct tty_struct *tty; unsigned long flags; @@ -702,12 +707,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port, idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); - if (idv == SIEMENS_VENDOR_ID) { if (idp == SIEMENS_PRODUCT_ID_X65 || idp == SIEMENS_PRODUCT_ID_SX1 || idp == SIEMENS_PRODUCT_ID_X75) { - length = 1; status_idx = 0; } @@ -721,8 +724,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port, prev_line_status = priv->line_status; priv->line_status = data[status_idx]; spin_unlock_irqrestore(&priv->lock, flags); + if (priv->line_status & UART_BREAK_ERROR) usb_serial_handle_break(port); + wake_up_interruptible(&port->port.delta_msr_wait); tty = tty_port_tty_get(&port->port); @@ -766,10 +771,11 @@ static void pl2303_read_int_callback(struct urb *urb) exit: retval = usb_submit_urb(urb, GFP_ATOMIC); - if (retval) + if (retval) { dev_err(&port->dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); + } } static void pl2303_process_read_urb(struct urb *urb) @@ -791,8 +797,10 @@ static void pl2303_process_read_urb(struct urb *urb) if (!urb->actual_length) return; - /* break takes precedence over parity, */ - /* which takes precedence over framing errors */ + /* + * 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) @@ -820,7 +828,6 @@ static void pl2303_process_read_urb(struct urb *urb) tty_flip_buffer_push(&port->port); } -/* All of the device info needed for the PL2303 SIO serial converter */ static struct usb_serial_driver pl2303_device = { .driver = { .owner = THIS_MODULE, @@ -832,7 +839,7 @@ static struct usb_serial_driver pl2303_device = { .bulk_out_size = 256, .open = pl2303_open, .close = pl2303_close, - .dtr_rts = pl2303_dtr_rts, + .dtr_rts = pl2303_dtr_rts, .carrier_raised = pl2303_carrier_raised, .ioctl = pl2303_ioctl, .break_ctl = pl2303_break_ctl, @@ -854,5 +861,5 @@ static struct usb_serial_driver * const serial_drivers[] = { module_usb_serial_driver(serial_drivers, id_table); -MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); MODULE_LICENSE("GPL"); |