patch-2.4.18 linux/drivers/usb/serial/kl5kusb105.c
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- Lines: 1133
- Date:
Wed Dec 26 15:09:47 2001
- Orig file:
linux.orig/drivers/usb/serial/kl5kusb105.c
- Orig date:
Thu Jan 1 00:00:00 1970
diff -Naur -X /home/marcelo/lib/dontdiff linux.orig/drivers/usb/serial/kl5kusb105.c linux/drivers/usb/serial/kl5kusb105.c
@@ -0,0 +1,1132 @@
+/*
+ * KLSI KL5KUSB105 chip RS232 converter driver
+ *
+ * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
+ *
+ * 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.
+ *
+ * All information about the device was acquired using SniffUSB ans snoopUSB
+ * on Windows98.
+ * It was written out of frustration with the PalmConnect USB Serial adapter
+ * sold by Palm Inc.
+ * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
+ * information that was not already available.
+ *
+ * It seems that KLSI bought some silicon-design information from ScanLogic,
+ * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
+ * KLSI has firmware available for their devices; it is probable that the
+ * firmware differs from that used by KLSI in their products. If you have an
+ * original KLSI device and can provide some information on it, I would be
+ * most interested in adding support for it here. If you have any information
+ * on the protocol used (or find errors in my reverse-engineered stuff), please
+ * let me know.
+ *
+ * The code was only tested with a PalmConnect USB adapter; if you
+ * are adventurous, try it with any KLSI-based device and let me know how it
+ * breaks so that I can fix it!
+ */
+
+/* TODO:
+ * check modem line signals
+ * implement handshaking or decide that we do not support it
+ */
+
+/* History:
+ * 0.3a - implemented pools of write URBs
+ * 0.3 - alpha version for public testing
+ * 0.2 - TIOCMGET works, so autopilot(1) can be used!
+ * 0.1 - can be used to to pilot-xfer -p /dev/ttyUSB0 -l
+ *
+ * The driver skeleton is mainly based on mct_u232.c and various other
+ * pieces of code shamelessly copied from the drivers/usb/serial/ directory.
+ */
+
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+/*#include <linux/fcntl.h>*/
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+/*#include <linux/spinlock.h>*/
+#include <linux/usb.h>
+
+#ifdef CONFIG_USB_SERIAL_DEBUG
+ static int debug = 1;
+#else
+ static int debug;
+#endif
+
+#include "usb-serial.h"
+#include "kl5kusb105.h"
+
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.3a"
+#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>"
+#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
+
+
+/*
+ * Function prototypes
+ */
+static int klsi_105_startup (struct usb_serial *serial);
+static void klsi_105_shutdown (struct usb_serial *serial);
+static int klsi_105_open (struct usb_serial_port *port,
+ struct file *filp);
+static void klsi_105_close (struct usb_serial_port *port,
+ struct file *filp);
+static int klsi_105_write (struct usb_serial_port *port,
+ int from_user,
+ const unsigned char *buf,
+ int count);
+static void klsi_105_write_bulk_callback (struct urb *urb);
+static int klsi_105_chars_in_buffer (struct usb_serial_port *port);
+static int klsi_105_write_room (struct usb_serial_port *port);
+
+static void klsi_105_read_bulk_callback (struct urb *urb);
+static void klsi_105_set_termios (struct usb_serial_port *port,
+ struct termios * old);
+static int klsi_105_ioctl (struct usb_serial_port *port,
+ struct file * file,
+ unsigned int cmd,
+ unsigned long arg);
+static void klsi_105_throttle (struct usb_serial_port *port);
+static void klsi_105_unthrottle (struct usb_serial_port *port);
+/*
+static void klsi_105_break_ctl (struct usb_serial_port *port,
+ int break_state );
+ */
+
+/*
+ * All of the device info needed for the MCT USB-RS232 converter.
+ */
+static __devinitdata struct usb_device_id id_table_combined [] = {
+ { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
+ { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
+ { } /* Terminating entry */
+};
+
+static __devinitdata struct usb_device_id palmconnect_table [] = {
+ { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
+ { } /* Terminating entry */
+};
+
+static __devinitdata struct usb_device_id kl5kusb105d_table [] = {
+ { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
+ { } /* Terminating entry */
+};
+
+
+MODULE_DEVICE_TABLE (usb, id_table_combined);
+
+
+static struct usb_serial_device_type palmconnect_device = {
+ name: "PalmConnect USB Serial",
+ id_table: palmconnect_table,
+ needs_interrupt_in: MUST_HAVE, /* 1 interrupt-in endpoints */
+ needs_bulk_in: MUST_HAVE, /* 1 bulk-in endpoint */
+ needs_bulk_out: MUST_HAVE, /* 1 bulk-out endpoint */
+ num_interrupt_in: 1,
+ num_bulk_in: 1,
+ num_bulk_out: 1,
+ num_ports: 1,
+ open: klsi_105_open,
+ close: klsi_105_close,
+ write: klsi_105_write,
+ write_bulk_callback: klsi_105_write_bulk_callback,
+ chars_in_buffer: klsi_105_chars_in_buffer,
+ write_room: klsi_105_write_room,
+ read_bulk_callback: klsi_105_read_bulk_callback,
+ ioctl: klsi_105_ioctl,
+ set_termios: klsi_105_set_termios,
+ /*break_ctl: klsi_105_break_ctl,*/
+ startup: klsi_105_startup,
+ shutdown: klsi_105_shutdown,
+ throttle: klsi_105_throttle,
+ unthrottle: klsi_105_unthrottle,
+};
+
+static struct usb_serial_device_type kl5kusb105d_device = {
+ name: "generic KL5KUSB105D USB->Serial",
+ id_table: kl5kusb105d_table,
+ needs_interrupt_in: MUST_HAVE, /* 1 interrupt-in endpoints */
+ needs_bulk_in: MUST_HAVE, /* 1 bulk-in endpoint */
+ needs_bulk_out: MUST_HAVE, /* 1 bulk-out endpoint */
+ num_interrupt_in: 1,
+ num_bulk_in: 1,
+ num_bulk_out: 1,
+ num_ports: 1,
+ open: klsi_105_open,
+ close: klsi_105_close,
+ write: klsi_105_write,
+ write_bulk_callback: klsi_105_write_bulk_callback,
+ chars_in_buffer: klsi_105_chars_in_buffer,
+ write_room: klsi_105_write_room,
+ read_bulk_callback: klsi_105_read_bulk_callback,
+ ioctl: klsi_105_ioctl,
+ set_termios: klsi_105_set_termios,
+ /*break_ctl: klsi_105_break_ctl,*/
+ startup: klsi_105_startup,
+ shutdown: klsi_105_shutdown,
+ throttle: klsi_105_throttle,
+ unthrottle: klsi_105_unthrottle,
+};
+
+
+struct klsi_105_port_settings {
+ __u8 pktlen; /* always 5, it seems */
+ __u8 baudrate;
+ __u8 databits;
+ __u8 unknown1;
+ __u8 unknown2;
+} __attribute__ ((packed));
+
+/* we implement a pool of NUM_URBS urbs per usb_serial */
+#define NUM_URBS 1
+#define URB_TRANSFER_BUFFER_SIZE 64
+struct klsi_105_private {
+ struct klsi_105_port_settings cfg;
+ struct termios termios;
+ unsigned long line_state; /* modem line settings */
+ /* write pool */
+ struct urb * write_urb_pool[NUM_URBS];
+ spinlock_t write_urb_pool_lock;
+ unsigned long bytes_in;
+ unsigned long bytes_out;
+};
+
+
+/*
+ * Handle vendor specific USB requests
+ */
+
+
+#define KLSI_TIMEOUT (HZ * 5 ) /* default urb timeout */
+
+static int klsi_105_chg_port_settings(struct usb_serial *serial,
+ struct klsi_105_port_settings *settings)
+{
+ int rc;
+
+ rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ KL5KUSB105A_SIO_SET_DATA,
+ USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
+ 0, /* value */
+ 0, /* index */
+ settings,
+ sizeof(struct klsi_105_port_settings),
+ KLSI_TIMEOUT);
+ if (rc < 0)
+ err("Change port settings failed (error = %d)", rc);
+ info(__FUNCTION__ " - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
+ settings->pktlen,
+ settings->baudrate, settings->databits,
+ settings->unknown1, settings->unknown2);
+ return rc;
+} /* klsi_105_chg_port_settings */
+
+/* translate a 16-bit status value from the device to linux's TIO bits */
+static unsigned long klsi_105_status2linestate(const __u16 status)
+{
+ unsigned long res = 0;
+
+ res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
+ | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
+ ;
+
+ return res;
+}
+/*
+ * Read line control via vendor command and return result through
+ * *line_state_p
+ */
+/* It seems that the status buffer has always only 2 bytes length */
+#define KLSI_STATUSBUF_LEN 2
+static int klsi_105_get_line_state(struct usb_serial *serial,
+ unsigned long *line_state_p)
+{
+ int rc;
+ __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1};
+ __u16 status;
+
+ info(__FUNCTION__ " - sending SIO Poll request");
+ rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ KL5KUSB105A_SIO_POLL,
+ USB_TYPE_VENDOR | USB_DIR_IN,
+ 0, /* value */
+ 0, /* index */
+ status_buf, KLSI_STATUSBUF_LEN,
+ 10*HZ
+ );
+ if (rc < 0)
+ err("Reading line status failed (error = %d)", rc);
+ else {
+ status = status_buf[0] + (status_buf[1]<<8);
+
+ info(__FUNCTION__ " - read status %x %x",
+ status_buf[0], status_buf[1]);
+
+ *line_state_p = klsi_105_status2linestate(status);
+ }
+
+ return rc;
+}
+
+
+/*
+ * Driver's tty interface functions
+ */
+
+static int klsi_105_startup (struct usb_serial *serial)
+{
+ struct klsi_105_private *priv;
+ int i;
+
+ /* check if we support the product id (see keyspan.c)
+ * FIXME
+ */
+
+ /* allocate the private data structure */
+ for (i=0; i<serial->num_ports; i++) {
+ serial->port[i].private = kmalloc(sizeof(struct klsi_105_private),
+ GFP_KERNEL);
+ if (!serial->port[i].private) {
+ dbg(__FUNCTION__ "kmalloc for klsi_105_private failed.");
+ return (-1); /* error */
+ }
+ priv = (struct klsi_105_private *)serial->port[i].private;
+ /* set initial values for control structures */
+ priv->cfg.pktlen = 5;
+ priv->cfg.baudrate = kl5kusb105a_sio_b9600;
+ priv->cfg.databits = kl5kusb105a_dtb_8;
+ priv->cfg.unknown1 = 0;
+ priv->cfg.unknown2 = 1;
+
+ priv->line_state = 0;
+
+ priv->bytes_in = 0;
+ priv->bytes_out = 0;
+
+ spin_lock_init (&priv->write_urb_pool_lock);
+ for (i=0; i<NUM_URBS; i++) {
+ struct urb* urb = usb_alloc_urb(0);
+
+ priv->write_urb_pool[i] = urb;
+ if (urb == NULL) {
+ err("No more urbs???");
+ continue;
+ }
+
+ urb->transfer_buffer = NULL;
+ urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
+ GFP_KERNEL);
+ if (!urb->transfer_buffer) {
+ err (__FUNCTION__
+ " - out of memory for urb buffers.");
+ continue;
+ }
+ }
+
+ /* priv->termios is left uninitalized until port opening */
+ init_waitqueue_head(&serial->port[i].write_wait);
+ }
+
+ return (0);
+} /* klsi_105_startup */
+
+
+static void klsi_105_shutdown (struct usb_serial *serial)
+{
+ int i;
+
+ dbg (__FUNCTION__);
+
+ /* stop reads and writes on all ports */
+ for (i=0; i < serial->num_ports; ++i) {
+ struct klsi_105_private *priv =
+ (struct klsi_105_private*) serial->port[i].private;
+ unsigned long flags;
+ while (serial->port[i].open_count > 0) {
+ klsi_105_close (&serial->port[i], NULL);
+ }
+
+ if (priv) {
+ /* kill our write urb pool */
+ int j;
+ struct urb **write_urbs = priv->write_urb_pool;
+ spin_lock_irqsave(&priv->write_urb_pool_lock,flags);
+
+ for (j = 0; j < NUM_URBS; j++) {
+ if (write_urbs[j]) {
+ /* FIXME - uncomment the following
+ * usb_unlink_urb call when the host
+ * controllers get fixed to set
+ * urb->dev = NULL after the urb is
+ * finished. Otherwise this call
+ * oopses. */
+ /* usb_unlink_urb(write_urbs[j]); */
+ if (write_urbs[j]->transfer_buffer)
+ kfree(write_urbs[j]->transfer_buffer);
+ usb_free_urb (write_urbs[j]);
+ }
+ }
+
+ spin_unlock_irqrestore (&priv->write_urb_pool_lock,
+ flags);
+
+ kfree(serial->port[i].private);
+ }
+ }
+} /* klsi_105_shutdown */
+
+static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial = port->serial;
+ struct klsi_105_private *priv = (struct klsi_105_private *)port->private;
+ int retval = 0;
+
+ dbg(__FUNCTION__" port %d", port->number);
+
+ down (&port->sem);
+
+ ++port->open_count;
+ MOD_INC_USE_COUNT;
+
+ if (!port->active) {
+ int rc;
+ int i;
+ unsigned long line_state;
+ port->active = 1;
+
+ /* force low_latency on so that our tty_push actually forces
+ * the data through
+ * port->tty->low_latency = 1; */
+
+ /* Do a defined restart:
+ * Set up sane default baud rate and send the 'READ_ON'
+ * vendor command.
+ * FIXME: set modem line control (how?)
+ * Then read the modem line control and store values in
+ * priv->line_state.
+ */
+ priv->cfg.pktlen = 5;
+ priv->cfg.baudrate = kl5kusb105a_sio_b9600;
+ priv->cfg.databits = kl5kusb105a_dtb_8;
+ priv->cfg.unknown1 = 0;
+ priv->cfg.unknown2 = 1;
+ klsi_105_chg_port_settings(serial, &(priv->cfg));
+
+ /* set up termios structure */
+ priv->termios.c_iflag = port->tty->termios->c_iflag;
+ priv->termios.c_oflag = port->tty->termios->c_oflag;
+ priv->termios.c_cflag = port->tty->termios->c_cflag;
+ priv->termios.c_lflag = port->tty->termios->c_lflag;
+ for (i=0; i<NCCS; i++)
+ priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
+
+
+ /* READ_ON and urb submission */
+ FILL_BULK_URB(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->transfer_buffer_length,
+ klsi_105_read_bulk_callback,
+ port);
+ port->read_urb->transfer_flags |= USB_QUEUE_BULK;
+
+ rc = usb_submit_urb(port->read_urb);
+ if (rc) {
+ err(__FUNCTION__
+ " - failed submitting read urb, error %d", rc);
+ retval = rc;
+ goto exit;
+ }
+
+ rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0),
+ KL5KUSB105A_SIO_CONFIGURE,
+ USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
+ KL5KUSB105A_SIO_CONFIGURE_READ_ON,
+ 0, /* index */
+ NULL,
+ 0,
+ KLSI_TIMEOUT);
+ if (rc < 0) {
+ err("Enabling read failed (error = %d)", rc);
+ retval = rc;
+ } else
+ dbg(__FUNCTION__ " - enabled reading");
+
+ rc = klsi_105_get_line_state(serial, &line_state);
+ if (rc >= 0) {
+ priv->line_state = line_state;
+ dbg(__FUNCTION__
+ " - read line state 0x%lx", line_state);
+ retval = 0;
+ } else
+ retval = rc;
+ }
+
+exit:
+ up (&port->sem);
+
+ return retval;
+} /* klsi_105_open */
+
+
+static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial;
+ struct klsi_105_private *priv
+ = (struct klsi_105_private *)port->private;
+ dbg(__FUNCTION__" port %d", port->number);
+
+ serial = get_usb_serial (port, __FUNCTION__);
+
+ if(!serial)
+ return;
+
+ down (&port->sem);
+
+ --port->open_count;
+
+ if (port->open_count <= 0) {
+ /* send READ_OFF */
+ int rc = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ KL5KUSB105A_SIO_CONFIGURE,
+ USB_TYPE_VENDOR | USB_DIR_OUT,
+ KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
+ 0, /* index */
+ NULL, 0,
+ KLSI_TIMEOUT);
+ if (rc < 0)
+ err("Disabling read failed (error = %d)", rc);
+
+ /* shutdown our bulk reads and writes */
+ usb_unlink_urb (port->write_urb);
+ usb_unlink_urb (port->read_urb);
+ /* unlink our write pool */
+ /* FIXME */
+ /* wgg - do I need this? I think so. */
+ usb_unlink_urb (port->interrupt_in_urb);
+ port->active = 0;
+ info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
+ }
+
+ up (&port->sem);
+ MOD_DEC_USE_COUNT;
+} /* klsi_105_close */
+
+
+/* We need to write a complete 64-byte data block and encode the
+ * number actually sent in the first double-byte, LSB-order. That
+ * leaves at most 62 bytes of payload.
+ */
+#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
+
+static int klsi_105_write (struct usb_serial_port *port, int from_user,
+ const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = port->serial;
+ struct klsi_105_private *priv =
+ (struct klsi_105_private*) port->private;
+ int result, size;
+ int bytes_sent=0;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ down (&port->sem); /* to lock against someone else trying to
+ take an URB we just selected from the pool */
+
+ while (count > 0) {
+ /* try to find a free urb (write 0 bytes if none) */
+ struct urb *urb = NULL;
+ unsigned long flags;
+ int i;
+ /* since the pool is per-port we might not need the spin lock !? */
+ spin_lock_irqsave (&priv->write_urb_pool_lock, flags);
+ for (i=0; i<NUM_URBS; i++) {
+ if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
+ urb = priv->write_urb_pool[i];
+ dbg(__FUNCTION__ " - using pool URB %d", i);
+ break;
+ }
+ }
+ spin_unlock_irqrestore (&priv->write_urb_pool_lock, flags);
+
+ if (urb==NULL) {
+ dbg (__FUNCTION__ " - no more free urbs");
+ goto exit;
+ }
+
+ if (urb->transfer_buffer == NULL) {
+ urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+ if (urb->transfer_buffer == NULL) {
+ err(__FUNCTION__ " - no more kernel memory...");
+ goto exit;
+ }
+ }
+
+ size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
+ size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
+
+ if (from_user) {
+ if (copy_from_user(urb->transfer_buffer
+ + KLSI_105_DATA_OFFSET, buf, size)) {
+ up (&port->sem);
+ return -EFAULT;
+ }
+ } else {
+ memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET,
+ buf, size);
+ }
+
+ /* write payload size into transfer buffer */
+ ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
+ ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
+
+ /* set up our urb */
+ FILL_BULK_URB(urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ urb->transfer_buffer,
+ URB_TRANSFER_BUFFER_SIZE,
+ klsi_105_write_bulk_callback,
+ port);
+ urb->transfer_flags |= USB_QUEUE_BULK;
+
+
+ /* send the data out the bulk port */
+ result = usb_submit_urb(urb);
+ if (result) {
+ err(__FUNCTION__
+ " - failed submitting write urb, error %d", result);
+ goto exit;
+ }
+ buf += size;
+ bytes_sent += size;
+ count -= size;
+ }
+exit:
+ up (&port->sem);
+ priv->bytes_out+=bytes_sent;
+
+ return bytes_sent; /* that's how much we wrote */
+} /* klsi_105_write */
+
+static void klsi_105_write_bulk_callback ( struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+ struct usb_serial *serial = port->serial;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ if (!serial) {
+ dbg(__FUNCTION__ " - bad serial pointer, exiting");
+ return;
+ }
+
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero write bulk status received: %d",
+ urb->status);
+ return;
+ }
+
+ /* from generic_write_bulk_callback */
+ queue_task(&port->tqueue, &tq_immediate);
+ mark_bh(IMMEDIATE_BH);
+
+ return;
+} /* klsi_105_write_bulk_completion_callback */
+
+
+/* return number of characters currently in the writing process */
+static int klsi_105_chars_in_buffer (struct usb_serial_port *port)
+{
+ int chars = 0;
+ int i;
+ unsigned long flags;
+ struct klsi_105_private *priv =
+ (struct klsi_105_private*) port->private;
+
+ spin_lock_irqsave (&priv->write_urb_pool_lock, flags);
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
+ chars += URB_TRANSFER_BUFFER_SIZE;
+ }
+ }
+
+ spin_unlock_irqrestore (&priv->write_urb_pool_lock, flags);
+
+ dbg (__FUNCTION__ " - returns %d", chars);
+ return (chars);
+}
+
+static int klsi_105_write_room (struct usb_serial_port *port)
+{
+ unsigned long flags;
+ int i;
+ int room = 0;
+ struct klsi_105_private *priv =
+ (struct klsi_105_private*) port->private;
+
+ spin_lock_irqsave (&priv->write_urb_pool_lock, flags);
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
+ room += URB_TRANSFER_BUFFER_SIZE;
+ }
+ }
+
+ spin_unlock_irqrestore (&priv->write_urb_pool_lock, flags);
+
+ dbg(__FUNCTION__ " - returns %d", room);
+ return (room);
+}
+
+
+
+static void klsi_105_read_bulk_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+ struct usb_serial *serial = port->serial;
+ struct klsi_105_private *priv =
+ (struct klsi_105_private*) port->private;
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ int rc;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ /* The urb might have been killed. */
+ if (urb->status) {
+ dbg(__FUNCTION__ " - nonzero read bulk status received: %d",
+ urb->status);
+ return;
+ }
+ if (!serial) {
+ dbg(__FUNCTION__ " - bad serial pointer, exiting");
+ return;
+ }
+
+ /* The data received is again preceded by a length double-byte in LSB-
+ * first order (see klsi_105_write() )
+ */
+ if (urb->actual_length == 0) {
+ /* empty urbs seem to happen, we ignore them */
+ /* dbg(__FUNCTION__ " - emtpy URB"); */
+ ;
+ } else if (urb->actual_length <= 2) {
+ dbg(__FUNCTION__ " - size %d URB not understood",
+ urb->actual_length);
+ usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
+ } else {
+ int i;
+ int bytes_sent = ((__u8 *) data)[0] +
+ ((unsigned int) ((__u8 *) data)[1] << 8);
+ tty = port->tty;
+ /* we should immediately resubmit the URB, before attempting
+ * to pass the data on to the tty layer. But that needs locking
+ * against re-entry an then mixed-up data because of
+ * intermixed tty_flip_buffer_push()s
+ * FIXME
+ */
+ usb_serial_debug_data (__FILE__, __FUNCTION__,
+ urb->actual_length, data);
+
+ if (bytes_sent + 2 > urb->actual_length) {
+ dbg(__FUNCTION__
+ " - trying to read more data than available"
+ " (%d vs. %d)",
+ bytes_sent+2, urb->actual_length);
+ /* cap at implied limit */
+ bytes_sent = urb->actual_length - 2;
+ }
+
+ for (i = 2; i < 2+bytes_sent; i++) {
+ /* if we insert more than TTY_FLIPBUF_SIZE characters,
+ * we drop them. */
+ if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ tty_flip_buffer_push(tty);
+ }
+ /* this doesn't actually push the data through unless
+ * tty->low_latency is set */
+ tty_insert_flip_char(tty, ((__u8*) data)[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ priv->bytes_in += bytes_sent;
+ }
+ /* Continue trying to always read */
+ FILL_BULK_URB(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->transfer_buffer_length,
+ klsi_105_read_bulk_callback,
+ port);
+ rc = usb_submit_urb(port->read_urb);
+ if (rc)
+ err(__FUNCTION__
+ " - failed resubmitting read urb, error %d", rc);
+} /* klsi_105_read_bulk_callback */
+
+
+static void klsi_105_set_termios (struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ struct usb_serial *serial = port->serial;
+ struct klsi_105_private *priv = (struct klsi_105_private *)port->private;
+ unsigned int iflag = port->tty->termios->c_iflag;
+ unsigned int old_iflag = old_termios->c_iflag;
+ unsigned int cflag = port->tty->termios->c_cflag;
+ unsigned int old_cflag = old_termios->c_cflag;
+
+ /*
+ * Update baud rate
+ */
+ if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
+ /* reassert DTR and (maybe) RTS on transition from B0 */
+ if( (old_cflag & CBAUD) == B0 ) {
+ dbg(__FUNCTION__ ": baud was B0");
+#if 0
+ priv->control_state |= TIOCM_DTR;
+ /* don't set RTS if using hardware flow control */
+ if (!(old_cflag & CRTSCTS)) {
+ priv->control_state |= TIOCM_RTS;
+ }
+ mct_u232_set_modem_ctrl(serial, priv->control_state);
+#endif
+ }
+
+ switch(cflag & CBAUD) {
+ case B0: /* handled below */
+ break;
+ case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200;
+ break;
+ case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400;
+ break;
+ case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800;
+ break;
+ case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600;
+ break;
+ case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200;
+ break;
+ case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400;
+ break;
+ case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600;
+ break;
+ case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200;
+ break;
+ default:
+ err("KLSI USB->Serial converter:"
+ " unsupported baudrate request, using default"
+ " of 9600");
+ priv->cfg.baudrate = kl5kusb105a_sio_b9600;
+ break;
+ }
+ if ((cflag & CBAUD) == B0 ) {
+ dbg(__FUNCTION__ ": baud is B0");
+ /* Drop RTS and DTR */
+ /* maybe this should be simulated by sending read
+ * disable and read enable messages?
+ */
+ ;
+#if 0
+ priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
+ mct_u232_set_modem_ctrl(serial, priv->control_state);
+#endif
+ }
+ }
+
+ if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
+ /* set the number of data bits */
+ switch (cflag & CSIZE) {
+ case CS5:
+ dbg(__FUNCTION__ " - 5 bits/byte not supported");
+ return ;
+ case CS6:
+ dbg(__FUNCTION__ " - 6 bits/byte not supported");
+ return ;
+ case CS7:
+ priv->cfg.databits = kl5kusb105a_dtb_7;
+ break;
+ case CS8:
+ priv->cfg.databits = kl5kusb105a_dtb_8;
+ break;
+ default:
+ err("CSIZE was not CS5-CS8, using default of 8");
+ priv->cfg.databits = kl5kusb105a_dtb_8;
+ break;
+ }
+ }
+
+ /*
+ * Update line control register (LCR)
+ */
+ if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
+ || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
+
+#if 0
+ priv->last_lcr = 0;
+
+ /* set the parity */
+ if (cflag & PARENB)
+ priv->last_lcr |= (cflag & PARODD) ?
+ MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
+ else
+ priv->last_lcr |= MCT_U232_PARITY_NONE;
+
+ /* set the number of stop bits */
+ priv->last_lcr |= (cflag & CSTOPB) ?
+ MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
+
+ mct_u232_set_line_ctrl(serial, priv->last_lcr);
+#endif
+ ;
+ }
+
+ /*
+ * Set flow control: well, I do not really now how to handle DTR/RTS.
+ * Just do what we have seen with SniffUSB on Win98.
+ */
+ if( (iflag & IXOFF) != (old_iflag & IXOFF)
+ || (iflag & IXON) != (old_iflag & IXON)
+ || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
+
+ /* Drop DTR/RTS if no flow control otherwise assert */
+#if 0
+ if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
+ priv->control_state |= TIOCM_DTR | TIOCM_RTS;
+ else
+ priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
+ mct_u232_set_modem_ctrl(serial, priv->control_state);
+#endif
+ ;
+ }
+
+ /* now commit changes to device */
+ klsi_105_chg_port_settings(serial, &(priv->cfg));
+} /* klsi_105_set_termios */
+
+
+#if 0
+static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
+{
+ struct usb_serial *serial = port->serial;
+ struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
+ unsigned char lcr = priv->last_lcr;
+
+ dbg (__FUNCTION__ "state=%d", break_state);
+
+ if (break_state)
+ lcr |= MCT_U232_SET_BREAK;
+
+ mct_u232_set_line_ctrl(serial, lcr);
+} /* mct_u232_break_ctl */
+#endif
+
+static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial *serial = port->serial;
+ struct klsi_105_private *priv = (struct klsi_105_private *)port->private;
+ int mask;
+
+ dbg (__FUNCTION__ "cmd=0x%x", cmd);
+
+ /* Based on code from acm.c and others */
+ switch (cmd) {
+ case TIOCMGET: {
+ int rc;
+ unsigned long line_state;
+ dbg (__FUNCTION__ " - TIOCMGET request, just guessing");
+
+ rc = klsi_105_get_line_state(serial, &line_state);
+ if (rc < 0) {
+ err("Reading line control failed (error = %d)", rc);
+ /* better return value? EAGAIN? */
+ return -ENOIOCTLCMD;
+ } else {
+ priv->line_state = line_state;
+ dbg(__FUNCTION__ " - read line state 0x%lx", line_state);
+ }
+ return put_user(priv->line_state, (unsigned long *) arg);
+ };
+
+ case TIOCMSET: /* Turns on and off the lines as specified by the mask */
+ case TIOCMBIS: /* turns on (Sets) the lines as specified by the mask */
+ case TIOCMBIC: /* turns off (Clears) the lines as specified by the mask */
+ if (get_user(mask, (unsigned long *) arg))
+ return -EFAULT;
+
+ if ((cmd == TIOCMSET) || (mask & TIOCM_RTS)) {
+ /* RTS needs set */
+ if( ((cmd == TIOCMSET) && (mask & TIOCM_RTS)) ||
+ (cmd == TIOCMBIS) )
+ dbg (__FUNCTION__ " - set RTS not handled");
+ /* priv->control_state |= TIOCM_RTS; */
+ else
+ dbg (__FUNCTION__ " - clear RTS not handled");
+ /* priv->control_state &= ~TIOCM_RTS; */
+ }
+
+ if ((cmd == TIOCMSET) || (mask & TIOCM_DTR)) {
+ /* DTR needs set */
+ if( ((cmd == TIOCMSET) && (mask & TIOCM_DTR)) ||
+ (cmd == TIOCMBIS) )
+ dbg (__FUNCTION__ " - set DTR not handled");
+ /* priv->control_state |= TIOCM_DTR; */
+ else
+ dbg (__FUNCTION__ " - clear DTR not handled");
+ /* priv->control_state &= ~TIOCM_DTR; */
+ }
+ /*
+ mct_u232_set_modem_ctrl(serial, priv->control_state);
+ */
+ break;
+
+ case TIOCMIWAIT:
+ /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
+ /* TODO */
+ dbg (__FUNCTION__ " - TIOCMIWAIT not handled");
+ return -ENOIOCTLCMD;
+
+ case TIOCGICOUNT:
+ /* return count of modemline transitions */
+ /* TODO */
+ dbg (__FUNCTION__ " - TIOCGICOUNT not handled");
+ return -ENOIOCTLCMD;
+ case TCGETS: {
+ /* return current info to caller */
+ int retval;
+
+ dbg (__FUNCTION__ " - TCGETS data faked/incomplete");
+
+ retval = verify_area(VERIFY_WRITE, (void *)arg,
+ sizeof(struct termios));
+
+ if (retval)
+ return(retval);
+
+ kernel_termios_to_user_termios((struct termios *)arg,
+ &priv->termios);
+ return(0);
+ }
+ case TCSETS: {
+ /* set port termios to the one given by the user */
+ int retval;
+
+ dbg (__FUNCTION__ " - TCSETS not handled");
+
+ retval = verify_area(VERIFY_READ, (void *)arg,
+ sizeof(struct termios));
+
+ if (retval)
+ return(retval);
+
+ user_termios_to_kernel_termios(&priv->termios,
+ (struct termios *)arg);
+ klsi_105_set_termios(port, &priv->termios);
+ return(0);
+ }
+ case TCSETSW: {
+ /* set port termios and try to wait for completion of last
+ * write operation */
+ /* We guess here. If there are not too many write urbs
+ * outstanding, we lie. */
+ /* what is the right way to wait here? schedule() ? */
+ /*
+ while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE)
+ schedule();
+ */
+ return -ENOIOCTLCMD;
+ }
+ default:
+ dbg(__FUNCTION__ ": arg not supported - 0x%04x",cmd);
+ return(-ENOIOCTLCMD);
+ break;
+ }
+ return 0;
+} /* klsi_105_ioctl */
+
+static void klsi_105_throttle (struct usb_serial_port *port)
+{
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ down (&port->sem);
+
+ usb_unlink_urb (port->read_urb);
+
+ up (&port->sem);
+
+ return;
+}
+static void klsi_105_unthrottle (struct usb_serial_port *port)
+{
+ int result;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ down (&port->sem);
+
+ port->read_urb->dev = port->serial->dev;
+ result = usb_submit_urb(port->read_urb);
+ if (result)
+ err(__FUNCTION__ " - failed submitting read urb, error %d",
+ result);
+
+ up (&port->sem);
+
+ return;
+}
+
+
+
+static int __init klsi_105_init (void)
+{
+ usb_serial_register (&palmconnect_device);
+ usb_serial_register (&kl5kusb105d_device);
+
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+}
+
+
+static void __exit klsi_105_exit (void)
+{
+ usb_serial_deregister (&palmconnect_device);
+ usb_serial_deregister (&kl5kusb105d_device);
+}
+
+
+module_init (klsi_105_init);
+module_exit (klsi_105_exit);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "enable extensive debugging messages");
+/* FIXME: implement
+MODULE_PARM(num_urbs, "i");
+MODULE_PARM_DESC(num_urbs, "number of URBs to use in write pool");
+*/
+
+/* vim: set sts=8 ts=8 sw=8: */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)