From 9f7cdfe0cf7437a4ac87043622657ef34db61048 Mon Sep 17 00:00:00 2001
From: Nicolas Thill <nico@openwrt.org>
Date: Wed, 19 Oct 2005 02:41:50 +0000
Subject: [PATCH] add pl2303 bugfixes (thanks to komodo)

SVN-Revision: 2178
---
 .../patches/generic/211-pl2303_bugfixes.patch | 146 ++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 openwrt/target/linux/linux-2.4/patches/generic/211-pl2303_bugfixes.patch

diff --git a/openwrt/target/linux/linux-2.4/patches/generic/211-pl2303_bugfixes.patch b/openwrt/target/linux/linux-2.4/patches/generic/211-pl2303_bugfixes.patch
new file mode 100644
index 0000000000..bf7c3c3c42
--- /dev/null
+++ b/openwrt/target/linux/linux-2.4/patches/generic/211-pl2303_bugfixes.patch
@@ -0,0 +1,146 @@
+--- linux/drivers/usb/serial/pl2303.c.orig	2005-10-17 12:09:48.000000000 +0200
++++ linux/drivers/usb/serial/pl2303.c	2005-10-19 04:10:46.000000000 +0200
+@@ -14,6 +14,13 @@
+  * See Documentation/usb/usb-serial.txt for more information on using this driver
+  *
+  *
++ * 2005_Oct_19 grsch
++ * 		added some missing ioctl commands
++ * 		it seems that there's still an issue with the 2.6.8 version when
++ * 		using the device with echo "whatever" >/dev/usb/tts/0 .
++ * 		Apparently, a timeout is needed upon pl2303_close (implemented in
++ * 		2.6.13.4)
++ *
+  * 2005_Mar_05 grsch
+  *      ported 2.6.8 pl2303.c to 2.4.20 format
+  *      (HX model works fine now, ID table should be brought up to date)
+@@ -142,9 +149,8 @@
+ static int pl2303_write (struct usb_serial_port *port, int from_user,
+ 			 const unsigned char *buf, int count);
+ static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
+-static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
+-static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
+-			    unsigned int set, unsigned int clear);
++static int pl2303_tiocmget (struct usb_serial_port *port, unsigned int* value);
++static int pl2303_tiocmset (struct usb_serial_port *port, unsigned int cmd, unsigned int *value);
+ static int pl2303_startup (struct usb_serial *serial);
+ static void pl2303_shutdown (struct usb_serial *serial);
+ 
+@@ -642,11 +648,108 @@
+ 	return 0;
+ }
+ 
++
++
++static int pl2303_tiocmget (struct usb_serial_port *port, unsigned int *value)
++{
++	struct pl2303_private *priv = usb_get_serial_port_data(port);
++	unsigned long flags;
++	unsigned int mcr;
++	unsigned int status;
++	unsigned int result;
++
++	dbg("%s (%d)", __FUNCTION__, port->number);
++
++	spin_lock_irqsave (&priv->lock, flags);
++	mcr = priv->line_control;
++	status = priv->line_status;
++	spin_unlock_irqrestore (&priv->lock, flags);
++
++	result = ((mcr & CONTROL_DTR)		? TIOCM_DTR : 0)
++		  | ((mcr & CONTROL_RTS)	? TIOCM_RTS : 0)
++		  | ((status & UART_CTS)	? TIOCM_CTS : 0)
++		  | ((status & UART_DSR)	? TIOCM_DSR : 0)
++		  | ((status & UART_RING)	? TIOCM_RI  : 0)
++		  | ((status & UART_DCD)	? TIOCM_CD  : 0);
++
++	dbg("%s - result = %x", __FUNCTION__, result);
++
++	if (copy_to_user(value, &result, sizeof(int)))
++		return -EFAULT;
++	return 0;
++}
++
++
++
++static int pl2303_tiocmset (struct usb_serial_port *port, unsigned int cmd, unsigned int *value)
++{
++  /*
++	struct pl2303_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 |= CONTROL_RTS;
++	if (set & TIOCM_DTR)
++		priv->line_control |= CONTROL_DTR;
++	if (clear & TIOCM_RTS)
++		priv->line_control &= ~CONTROL_RTS;
++	if (clear & TIOCM_DTR)
++		priv->line_control &= ~CONTROL_DTR;
++	control = priv->line_control;
++	spin_unlock_irqrestore (&priv->lock, flags);
++
++	return set_control_lines (port->serial->dev, control);
++  */
++	struct pl2303_private *priv = port->private;
++	unsigned int arg;
++
++	if (copy_from_user(&arg, value, sizeof(int)))
++		return -EFAULT;
++
++	switch (cmd) {
++		case TIOCMBIS:
++			if (arg & TIOCM_RTS)
++				priv->line_control |= CONTROL_RTS;
++			if (arg & TIOCM_DTR)
++				priv->line_control |= CONTROL_DTR;
++			break;
++
++		case TIOCMBIC:
++			if (arg & TIOCM_RTS)
++				priv->line_control &= ~CONTROL_RTS;
++			if (arg & TIOCM_DTR)
++				priv->line_control &= ~CONTROL_DTR;
++			break;
++
++		case TIOCMSET:
++			/* turn off RTS and DTR and then only turn
++			   on what was asked to */
++			priv->line_control &= ~(CONTROL_RTS | CONTROL_DTR);
++			priv->line_control |= ((arg & TIOCM_RTS) ? CONTROL_RTS : 0);
++			priv->line_control |= ((arg & TIOCM_DTR) ? CONTROL_DTR : 0);
++			break;
++	}
++
++	return set_control_lines (port->serial->dev, priv->line_control);
++}
++
++
++
+ static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
+ {
+ 	dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
+ 
+ 	switch (cmd) {
++	        case TIOCMGET:
++		  dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
++		  return pl2303_tiocmget(port,(unsigned int *)arg);
++		case TIOCMBIS:
++		case TIOCMBIC:
++	        case TIOCMSET:
++		  dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,  port->number);
++       		  return pl2303_tiocmset(port,cmd,(unsigned int*)arg);
+ 		case TIOCMIWAIT:
+ 			dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
+ 			return wait_modem_info(port, arg);
+@@ -705,6 +808,8 @@
+ 
+ 	dbg("%s (%d)", __FUNCTION__, port->number);
+ 
++	dbg("%s - urb status %d...", __FUNCTION__, urb->status);
++
+ 	switch (urb->status) {
+ 	case 0:
+ 		/* success */
-- 
2.30.2