Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
new file mode 100644
index 0000000..3368d2b
--- /dev/null
+++ b/drivers/usb/serial/pl2303.c
@@ -0,0 +1,1200 @@
+/*
+ * Prolific PL2303 USB to serial adaptor driver
+ *
+ * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2003 IBM Corp.
+ *
+ * Original driver for 2.2.x by anonymous
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * See Documentation/usb/usb-serial.txt for more information on using this driver
+ *
+ * 2002_Mar_26 gkh
+ * allowed driver to work properly if there is no tty assigned to a port
+ * (this happens for serial console devices.)
+ *
+ * 2001_Oct_06 gkh
+ * Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it.
+ *
+ * 2001_Sep_19 gkh
+ * Added break support.
+ *
+ * 2001_Aug_30 gkh
+ * fixed oops in write_bulk_callback.
+ *
+ * 2001_Aug_28 gkh
+ * reworked buffer logic to be like other usb-serial drivers. Hopefully
+ * removing some reported problems.
+ *
+ * 2001_Jun_06 gkh
+ * finished porting to 2.4 format.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include <linux/usb.h>
+#include "usb-serial.h"
+#include "pl2303.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.12"
+#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
+
+static int debug;
+
+#define PL2303_CLOSING_WAIT (30*HZ)
+
+#define PL2303_BUF_SIZE 1024
+#define PL2303_TMP_BUF_SIZE 1024
+
+static DECLARE_MUTEX(pl2303_tmp_buf_sem);
+
+struct pl2303_buf {
+ unsigned int buf_size;
+ char *buf_buf;
+ char *buf_get;
+ char *buf_put;
+};
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
+ { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
+ { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
+ { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
+ { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
+ { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
+ { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
+ { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
+ { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
+ { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
+ { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
+ { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
+ { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
+ { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
+ { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
+ { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
+ { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static struct usb_driver pl2303_driver = {
+ .owner = THIS_MODULE,
+ .name = "pl2303",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+};
+
+#define SET_LINE_REQUEST_TYPE 0x21
+#define SET_LINE_REQUEST 0x20
+
+#define SET_CONTROL_REQUEST_TYPE 0x21
+#define SET_CONTROL_REQUEST 0x22
+#define CONTROL_DTR 0x01
+#define CONTROL_RTS 0x02
+
+#define BREAK_REQUEST_TYPE 0x21
+#define BREAK_REQUEST 0x23
+#define BREAK_ON 0xffff
+#define BREAK_OFF 0x0000
+
+#define GET_LINE_REQUEST_TYPE 0xa1
+#define GET_LINE_REQUEST 0x21
+
+#define VENDOR_WRITE_REQUEST_TYPE 0x40
+#define VENDOR_WRITE_REQUEST 0x01
+
+#define VENDOR_READ_REQUEST_TYPE 0xc0
+#define VENDOR_READ_REQUEST 0x01
+
+#define UART_STATE 0x08
+#define UART_STATE_TRANSIENT_MASK 0x74
+#define UART_DCD 0x01
+#define UART_DSR 0x02
+#define UART_BREAK_ERROR 0x04
+#define UART_RING 0x08
+#define UART_FRAME_ERROR 0x10
+#define UART_PARITY_ERROR 0x20
+#define UART_OVERRUN_ERROR 0x40
+#define UART_CTS 0x80
+
+/* function prototypes for a PL2303 serial converter */
+static int pl2303_open (struct usb_serial_port *port, struct file *filp);
+static void pl2303_close (struct usb_serial_port *port, struct file *filp);
+static void pl2303_set_termios (struct usb_serial_port *port,
+ struct termios *old);
+static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg);
+static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
+static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
+static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
+static int pl2303_write (struct usb_serial_port *port,
+ const unsigned char *buf, int count);
+static void pl2303_send (struct usb_serial_port *port);
+static int pl2303_write_room(struct usb_serial_port *port);
+static int pl2303_chars_in_buffer(struct usb_serial_port *port);
+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_startup (struct usb_serial *serial);
+static void pl2303_shutdown (struct usb_serial *serial);
+static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
+static void pl2303_buf_free(struct pl2303_buf *pb);
+static void pl2303_buf_clear(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
+static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
+ unsigned int count);
+static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
+ unsigned int count);
+
+
+/* All of the device info needed for the PL2303 SIO serial converter */
+static struct usb_serial_device_type pl2303_device = {
+ .owner = THIS_MODULE,
+ .name = "PL-2303",
+ .id_table = id_table,
+ .num_interrupt_in = NUM_DONT_CARE,
+ .num_bulk_in = 1,
+ .num_bulk_out = 1,
+ .num_ports = 1,
+ .open = pl2303_open,
+ .close = pl2303_close,
+ .write = pl2303_write,
+ .ioctl = pl2303_ioctl,
+ .break_ctl = pl2303_break_ctl,
+ .set_termios = pl2303_set_termios,
+ .tiocmget = pl2303_tiocmget,
+ .tiocmset = pl2303_tiocmset,
+ .read_bulk_callback = pl2303_read_bulk_callback,
+ .read_int_callback = pl2303_read_int_callback,
+ .write_bulk_callback = pl2303_write_bulk_callback,
+ .write_room = pl2303_write_room,
+ .chars_in_buffer = pl2303_chars_in_buffer,
+ .attach = pl2303_startup,
+ .shutdown = pl2303_shutdown,
+};
+
+enum pl2303_type {
+ type_0, /* don't know the difference between type 0 and */
+ type_1, /* type 1, until someone from prolific tells us... */
+ HX, /* HX version of the pl2303 chip */
+};
+
+struct pl2303_private {
+ spinlock_t lock;
+ struct pl2303_buf *buf;
+ int write_urb_in_use;
+ wait_queue_head_t delta_msr_wait;
+ u8 line_control;
+ u8 line_status;
+ u8 termios_initialized;
+ enum pl2303_type type;
+};
+
+
+static int pl2303_startup (struct usb_serial *serial)
+{
+ struct pl2303_private *priv;
+ enum pl2303_type type = type_0;
+ int i;
+
+ if (serial->dev->descriptor.bDeviceClass == 0x02)
+ type = type_0;
+ else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
+ type = HX;
+ else if (serial->dev->descriptor.bDeviceClass == 0x00)
+ type = type_1;
+ else if (serial->dev->descriptor.bDeviceClass == 0xFF)
+ type = type_1;
+ dbg("device type: %d", type);
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
+ if (!priv)
+ goto cleanup;
+ memset (priv, 0x00, sizeof (struct pl2303_private));
+ spin_lock_init(&priv->lock);
+ priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
+ if (priv->buf == NULL) {
+ kfree(priv);
+ goto cleanup;
+ }
+ init_waitqueue_head(&priv->delta_msr_wait);
+ priv->type = type;
+ usb_set_serial_port_data(serial->port[i], priv);
+ }
+ return 0;
+
+cleanup:
+ for (--i; i>=0; --i) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ pl2303_buf_free(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+ return -ENOMEM;
+}
+
+static int set_control_lines (struct usb_device *dev, u8 value)
+{
+ int retval;
+
+ retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
+ SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
+ value, 0, NULL, 0, 100);
+ dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
+ return retval;
+}
+
+static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
+
+ if (!count)
+ return count;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ count = pl2303_buf_put(priv->buf, buf, count);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ pl2303_send(port);
+
+ return count;
+}
+
+static void pl2303_send(struct usb_serial_port *port)
+{
+ int count, result;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (priv->write_urb_in_use) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
+ }
+
+ count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
+ port->bulk_out_size);
+
+ if (count == 0) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
+ }
+
+ priv->write_urb_in_use = 1;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
+
+ port->write_urb->transfer_buffer_length = count;
+ port->write_urb->dev = port->serial->dev;
+ result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
+ if (result) {
+ dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
+ priv->write_urb_in_use = 0;
+ // TODO: reschedule pl2303_send
+ }
+
+ schedule_work(&port->work);
+}
+
+static int pl2303_write_room(struct usb_serial_port *port)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ int room = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ room = pl2303_buf_space_avail(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, room);
+ return room;
+}
+
+static int pl2303_chars_in_buffer(struct usb_serial_port *port)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ int chars = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ chars = pl2303_buf_data_avail(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, chars);
+ return chars;
+}
+
+static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
+{
+ struct usb_serial *serial = port->serial;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int cflag;
+ unsigned char *buf;
+ int baud;
+ int i;
+ u8 control;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if ((!port->tty) || (!port->tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (!priv->termios_initialized) {
+ *(port->tty->termios) = tty_std_termios;
+ port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ priv->termios_initialized = 1;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ cflag = port->tty->termios->c_cflag;
+ /* check that they really want us to change something */
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
+ dbg("%s - nothing to change...", __FUNCTION__);
+ return;
+ }
+ }
+
+ buf = kmalloc (7, GFP_KERNEL);
+ if (!buf) {
+ dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
+ return;
+ }
+ memset (buf, 0x00, 0x07);
+
+ i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
+ GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+ dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+
+
+ if (cflag & CSIZE) {
+ switch (cflag & CSIZE) {
+ case CS5: buf[6] = 5; break;
+ case CS6: buf[6] = 6; break;
+ case CS7: buf[6] = 7; break;
+ default:
+ case CS8: buf[6] = 8; break;
+ }
+ dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
+ }
+
+ baud = 0;
+ switch (cflag & CBAUD) {
+ case B0: baud = 0; break;
+ case B75: baud = 75; break;
+ case B150: baud = 150; break;
+ case B300: baud = 300; break;
+ case B600: baud = 600; break;
+ case B1200: baud = 1200; break;
+ case B1800: baud = 1800; break;
+ case B2400: baud = 2400; break;
+ case B4800: baud = 4800; break;
+ case B9600: baud = 9600; break;
+ case B19200: baud = 19200; break;
+ case B38400: baud = 38400; break;
+ case B57600: baud = 57600; break;
+ case B115200: baud = 115200; break;
+ case B230400: baud = 230400; break;
+ case B460800: baud = 460800; break;
+ default:
+ dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
+ break;
+ }
+ dbg("%s - baud = %d", __FUNCTION__, baud);
+ if (baud) {
+ buf[0] = baud & 0xff;
+ buf[1] = (baud >> 8) & 0xff;
+ buf[2] = (baud >> 16) & 0xff;
+ buf[3] = (baud >> 24) & 0xff;
+ }
+
+ /* For reference buf[4]=0 is 1 stop bits */
+ /* For reference buf[4]=1 is 1.5 stop bits */
+ /* For reference buf[4]=2 is 2 stop bits */
+ if (cflag & CSTOPB) {
+ buf[4] = 2;
+ dbg("%s - stop bits = 2", __FUNCTION__);
+ } else {
+ buf[4] = 0;
+ dbg("%s - stop bits = 1", __FUNCTION__);
+ }
+
+ if (cflag & PARENB) {
+ /* For reference buf[5]=0 is none parity */
+ /* For reference buf[5]=1 is odd parity */
+ /* For reference buf[5]=2 is even parity */
+ /* For reference buf[5]=3 is mark parity */
+ /* For reference buf[5]=4 is space parity */
+ if (cflag & PARODD) {
+ buf[5] = 1;
+ dbg("%s - parity = odd", __FUNCTION__);
+ } else {
+ buf[5] = 2;
+ dbg("%s - parity = even", __FUNCTION__);
+ }
+ } else {
+ buf[5] = 0;
+ dbg("%s - parity = none", __FUNCTION__);
+ }
+
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+ dbg ("0x21:0x20:0:0 %d", i);
+
+ /* change control lines if we are switching to or from B0 */
+ spin_lock_irqsave(&priv->lock, flags);
+ control = priv->line_control;
+ if ((cflag & CBAUD) == B0)
+ priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
+ else
+ priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
+ if (control != priv->line_control) {
+ control = priv->line_control;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ set_control_lines(serial->dev, control);
+ } else {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+
+ buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
+
+ i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
+ GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
+ 0, 0, buf, 7, 100);
+ dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
+
+ if (cflag & CRTSCTS) {
+ __u16 index;
+ if (priv->type == HX)
+ index = 0x61;
+ else
+ index = 0x41;
+ i = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ VENDOR_WRITE_REQUEST,
+ VENDOR_WRITE_REQUEST_TYPE,
+ 0x0, index, NULL, 0, 100);
+ dbg ("0x40:0x1:0x0:0x%x %d", index, i);
+ }
+
+ kfree (buf);
+}
+
+static int pl2303_open (struct usb_serial_port *port, struct file *filp)
+{
+ struct termios tmp_termios;
+ struct usb_serial *serial = port->serial;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned char *buf;
+ int result;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ usb_clear_halt(serial->dev, port->write_urb->pipe);
+ usb_clear_halt(serial->dev, port->read_urb->pipe);
+
+ buf = kmalloc(10, GFP_KERNEL);
+ if (buf==NULL)
+ return -ENOMEM;
+
+#define FISH(a,b,c,d) \
+ result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
+ b, a, c, d, buf, 1, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
+
+#define SOUP(a,b,c,d) \
+ result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
+ b, a, c, d, NULL, 0, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
+
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
+
+ if (priv->type == HX) {
+ /* HX chip */
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
+ /* reset upstream data pipes */
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
+ } else {
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
+ }
+
+ kfree(buf);
+
+ /* Setup termios */
+ if (port->tty) {
+ pl2303_set_termios (port, &tmp_termios);
+ }
+
+ //FIXME: need to assert RTS and DTR if CRTSCTS off
+
+ dbg("%s - submitting read urb", __FUNCTION__);
+ port->read_urb->dev = serial->dev;
+ result = usb_submit_urb (port->read_urb, GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
+ pl2303_close (port, NULL);
+ return -EPROTO;
+ }
+
+ dbg("%s - submitting interrupt urb", __FUNCTION__);
+ port->interrupt_in_urb->dev = serial->dev;
+ result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
+ pl2303_close (port, NULL);
+ return -EPROTO;
+ }
+ return 0;
+}
+
+
+static void pl2303_close (struct usb_serial_port *port, struct file *filp)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int c_cflag;
+ int bps;
+ long timeout;
+ wait_queue_t wait; \
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ /* wait for data to drain from the buffer */
+ spin_lock_irqsave(&priv->lock, flags);
+ timeout = PL2303_CLOSING_WAIT;
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&port->tty->write_wait, &wait);
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (pl2303_buf_data_avail(priv->buf) == 0
+ || timeout == 0 || signal_pending(current)
+ || !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ break;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irqsave(&priv->lock, flags);
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->tty->write_wait, &wait);
+ /* clear out any remaining data in the buffer */
+ pl2303_buf_clear(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* wait for characters to drain from the device */
+ /* (this is long enough for the entire 256 byte */
+ /* pl2303 hardware buffer to drain with no flow */
+ /* control for data rates of 1200 bps or more, */
+ /* for lower rates we should really know how much */
+ /* data is in the buffer to compute a delay */
+ /* that is not unnecessarily long) */
+ bps = tty_get_baud_rate(port->tty);
+ if (bps > 1200)
+ timeout = max((HZ*2560)/bps,HZ/10);
+ else
+ timeout = 2*HZ;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(timeout);
+
+ /* shutdown our urbs */
+ dbg("%s - shutting down urbs", __FUNCTION__);
+ usb_kill_urb(port->write_urb);
+ usb_kill_urb(port->read_urb);
+ usb_kill_urb(port->interrupt_in_urb);
+
+ if (port->tty) {
+ c_cflag = port->tty->termios->c_cflag;
+ if (c_cflag & HUPCL) {
+ /* drop DTR and RTS */
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->line_control = 0;
+ spin_unlock_irqrestore (&priv->lock, flags);
+ set_control_lines (port->serial->dev, 0);
+ }
+ }
+}
+
+static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ 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);
+}
+
+static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
+{
+ 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);
+
+ return result;
+}
+
+static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
+{
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int prevstatus;
+ unsigned int status;
+ unsigned int changed;
+
+ spin_lock_irqsave (&priv->lock, flags);
+ prevstatus = priv->line_status;
+ spin_unlock_irqrestore (&priv->lock, flags);
+
+ while (1) {
+ interruptible_sleep_on(&priv->delta_msr_wait);
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+
+ spin_lock_irqsave (&priv->lock, flags);
+ status = priv->line_status;
+ spin_unlock_irqrestore (&priv->lock, flags);
+
+ changed=prevstatus^status;
+
+ if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
+ ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
+ ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
+ ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
+ return 0;
+ }
+ prevstatus = status;
+ }
+ /* NOTREACHED */
+ return 0;
+}
+
+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 TIOCMIWAIT:
+ dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
+ return wait_modem_info(port, arg);
+
+ default:
+ dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
+ break;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
+{
+ struct usb_serial *serial = port->serial;
+ u16 state;
+ int result;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (break_state == 0)
+ state = BREAK_OFF;
+ else
+ state = BREAK_ON;
+ dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
+
+ result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
+ 0, NULL, 0, 100);
+ if (result)
+ dbg("%s - error sending break = %d", __FUNCTION__, result);
+}
+
+
+static void pl2303_shutdown (struct usb_serial *serial)
+{
+ int i;
+ struct pl2303_private *priv;
+
+ dbg("%s", __FUNCTION__);
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ if (priv) {
+ pl2303_buf_free(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+ }
+}
+
+
+static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ unsigned char *data = urb->transfer_buffer;
+ unsigned long flags;
+ int status;
+ u8 uart_state;
+
+ dbg("%s (%d)", __FUNCTION__, port->number);
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+ return;
+ default:
+ dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+ goto exit;
+ }
+
+
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
+
+ if (urb->actual_length < UART_STATE)
+ goto exit;
+
+ /* Save off the uart status for others to look at */
+ uart_state = data[UART_STATE];
+ spin_lock_irqsave(&priv->lock, flags);
+ uart_state |= (priv->line_status & UART_STATE_TRANSIENT_MASK);
+ priv->line_status = uart_state;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+exit:
+ status = usb_submit_urb (urb, GFP_ATOMIC);
+ if (status)
+ dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
+ __FUNCTION__, status);
+}
+
+
+static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ unsigned long flags;
+ int i;
+ int result;
+ u8 status;
+ char tty_flag;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (urb->status) {
+ dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
+ if (!port->open_count) {
+ dbg("%s - port is closed, exiting.", __FUNCTION__);
+ return;
+ }
+ if (urb->status == -EPROTO) {
+ /* PL2303 mysteriously fails with -EPROTO reschedule the read */
+ dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
+ urb->status = 0;
+ urb->dev = port->serial->dev;
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ return;
+ }
+ dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
+ return;
+ }
+
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+
+ /* get tty_flag from status */
+ tty_flag = TTY_NORMAL;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ status = priv->line_status;
+ priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ wake_up_interruptible (&priv->delta_msr_wait);
+
+ /* break takes precedence over parity, */
+ /* which takes precedence over framing errors */
+ if (status & UART_BREAK_ERROR )
+ tty_flag = TTY_BREAK;
+ else if (status & UART_PARITY_ERROR)
+ tty_flag = TTY_PARITY;
+ else if (status & UART_FRAME_ERROR)
+ tty_flag = TTY_FRAME;
+ dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
+
+ tty = port->tty;
+ if (tty && urb->actual_length) {
+ /* overrun is special, not associated with a char */
+ if (status & UART_OVERRUN_ERROR)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+
+ for (i = 0; i < urb->actual_length; ++i) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ tty_flip_buffer_push(tty);
+ }
+ tty_insert_flip_char (tty, data[i], tty_flag);
+ }
+ tty_flip_buffer_push (tty);
+ }
+
+ /* Schedule the next read _if_ we are still open */
+ if (port->open_count) {
+ urb->dev = port->serial->dev;
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ }
+
+ return;
+}
+
+
+
+static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct pl2303_private *priv = usb_get_serial_port_data(port);
+ int result;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+ priv->write_urb_in_use = 0;
+ return;
+ default:
+ /* error in the urb, so we have to resubmit it */
+ dbg("%s - Overflow in write", __FUNCTION__);
+ dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+ port->write_urb->transfer_buffer_length = 1;
+ port->write_urb->dev = port->serial->dev;
+ result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
+ else
+ return;
+ }
+
+ priv->write_urb_in_use = 0;
+
+ /* send any buffered data */
+ pl2303_send(port);
+}
+
+
+/*
+ * pl2303_buf_alloc
+ *
+ * Allocate a circular buffer and all associated memory.
+ */
+
+static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
+{
+
+ struct pl2303_buf *pb;
+
+
+ if (size == 0)
+ return NULL;
+
+ pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
+ if (pb == NULL)
+ return NULL;
+
+ pb->buf_buf = kmalloc(size, GFP_KERNEL);
+ if (pb->buf_buf == NULL) {
+ kfree(pb);
+ return NULL;
+ }
+
+ pb->buf_size = size;
+ pb->buf_get = pb->buf_put = pb->buf_buf;
+
+ return pb;
+
+}
+
+
+/*
+ * pl2303_buf_free
+ *
+ * Free the buffer and all associated memory.
+ */
+
+static void pl2303_buf_free(struct pl2303_buf *pb)
+{
+ if (pb != NULL) {
+ if (pb->buf_buf != NULL)
+ kfree(pb->buf_buf);
+ kfree(pb);
+ }
+}
+
+
+/*
+ * pl2303_buf_clear
+ *
+ * Clear out all data in the circular buffer.
+ */
+
+static void pl2303_buf_clear(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ pb->buf_get = pb->buf_put;
+ /* equivalent to a get of all data available */
+}
+
+
+/*
+ * pl2303_buf_data_avail
+ *
+ * Return the number of bytes of data available in the circular
+ * buffer.
+ */
+
+static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
+ else
+ return 0;
+}
+
+
+/*
+ * pl2303_buf_space_avail
+ *
+ * Return the number of bytes of space available in the circular
+ * buffer.
+ */
+
+static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
+{
+ if (pb != NULL)
+ return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
+ else
+ return 0;
+}
+
+
+/*
+ * pl2303_buf_put
+ *
+ * Copy data data from a user buffer and put it into the circular buffer.
+ * Restrict to the amount of space available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
+ unsigned int count)
+{
+
+ unsigned int len;
+
+
+ if (pb == NULL)
+ return 0;
+
+ len = pl2303_buf_space_avail(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_put;
+ if (count > len) {
+ memcpy(pb->buf_put, buf, len);
+ memcpy(pb->buf_buf, buf+len, count - len);
+ pb->buf_put = pb->buf_buf + count - len;
+ } else {
+ memcpy(pb->buf_put, buf, count);
+ if (count < len)
+ pb->buf_put += count;
+ else /* count == len */
+ pb->buf_put = pb->buf_buf;
+ }
+
+ return count;
+
+}
+
+
+/*
+ * pl2303_buf_get
+ *
+ * Get data from the circular buffer and copy to the given buffer.
+ * Restrict to the amount of data available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
+ unsigned int count)
+{
+
+ unsigned int len;
+
+
+ if (pb == NULL)
+ return 0;
+
+ len = pl2303_buf_data_avail(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_get;
+ if (count > len) {
+ memcpy(buf, pb->buf_get, len);
+ memcpy(buf+len, pb->buf_buf, count - len);
+ pb->buf_get = pb->buf_buf + count - len;
+ } else {
+ memcpy(buf, pb->buf_get, count);
+ if (count < len)
+ pb->buf_get += count;
+ else /* count == len */
+ pb->buf_get = pb->buf_buf;
+ }
+
+ return count;
+
+}
+
+static int __init pl2303_init (void)
+{
+ int retval;
+ retval = usb_serial_register(&pl2303_device);
+ if (retval)
+ goto failed_usb_serial_register;
+ retval = usb_register(&pl2303_driver);
+ if (retval)
+ goto failed_usb_register;
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+failed_usb_register:
+ usb_serial_deregister(&pl2303_device);
+failed_usb_serial_register:
+ return retval;
+}
+
+
+static void __exit pl2303_exit (void)
+{
+ usb_deregister (&pl2303_driver);
+ usb_serial_deregister (&pl2303_device);
+}
+
+
+module_init(pl2303_init);
+module_exit(pl2303_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+