patch-2.3.51 linux/drivers/usb/serial/usb-serial.c
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- Lines: 2550
- Date:
Fri Mar 10 16:18:34 2000
- Orig file:
v2.3.50/linux/drivers/usb/serial/usb-serial.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.50/linux/drivers/usb/serial/usb-serial.c linux/drivers/usb/serial/usb-serial.c
@@ -0,0 +1,2549 @@
+/*
+ * USB Serial Converter driver
+ *
+ * (C) Copyright (C) 1999, 2000
+ * Greg Kroah-Hartman (greg@kroah.com)
+ *
+ * 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.
+ *
+ * This driver was originally based on the ACM driver by Armin Fuerst (which was
+ * based on a driver by Brad Keryan)
+ *
+ * See Documentation/usb/usb-serial.txt for more information on using this driver
+ *
+ * (03/06/2000) gkh
+ * Added the keyspan pda code from Brian Warner <warner@lothar.com>
+ * Moved a bunch of the port specific stuff into its own structure. This
+ * is in anticipation of the true multiport devices (there's a bug if you
+ * try to access more than one port of any multiport device right now)
+ *
+ * (02/21/2000) gkh
+ * Made it so that any serial devices only have to specify which functions
+ * they want to overload from the generic function calls (great,
+ * inheritance in C, in a driver, just what I wanted...)
+ * Added support for set_termios and ioctl function calls. No drivers take
+ * advantage of this yet.
+ * Removed the #ifdef MODULE, now there is no module specific code.
+ * Cleaned up a few comments in usb-serial.h that were wrong (thanks again
+ * to Miles Lott).
+ * Small fix to get_free_serial.
+ *
+ * (02/14/2000) gkh
+ * Removed the Belkin and Peracom functionality from the driver due to
+ * the lack of support from the vendor, and me not wanting people to
+ * accidenatly buy the device, expecting it to work with Linux.
+ * Added read_bulk_callback and write_bulk_callback to the type structure
+ * for the needs of the FTDI and WhiteHEAT driver.
+ * Changed all reverences to FTDI to FTDI_SIO at the request of Bill
+ * Ryder.
+ * Changed the output urb size back to the max endpoint size to make
+ * the ftdi_sio driver have it easier, and due to the fact that it didn't
+ * really increase the speed any.
+ *
+ * (02/11/2000) gkh
+ * Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a
+ * patch from Miles Lott (milos@insync.net).
+ * Fixed bug with not restoring the minor range that a device grabs, if
+ * the startup function fails (thanks Miles for finding this).
+ *
+ * (02/05/2000) gkh
+ * Added initial framework for the Keyspan PDA serial converter so that
+ * Brian Warner has a place to put his code.
+ * Made the ezusb specific functions generic enough that different
+ * devices can use them (whiteheat and keyspan_pda both need them).
+ * Split out a whole bunch of structure and other stuff to a seperate
+ * usb-serial.h file.
+ * Made the Visor connection messages a little more understandable, now
+ * that Miles Lott (milos@insync.net) has gotten the Generic channel to
+ * work. Also made them always show up in the log file.
+ *
+ * (01/25/2000) gkh
+ * Added initial framework for FTDI serial converter so that Bill Ryder
+ * has a place to put his code.
+ * Added the vendor specific info from Handspring. Now we can print out
+ * informational debug messages as well as understand what is happening.
+ *
+ * (01/23/2000) gkh
+ * Fixed problem of crash when trying to open a port that didn't have a
+ * device assigned to it. Made the minor node finding a little smarter,
+ * now it looks to find a continous space for the new device.
+ *
+ * (01/21/2000) gkh
+ * Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net)
+ * Fixed get_serial_by_minor which was all messed up for multi port
+ * devices. Fixed multi port problem for generic devices. Now the number
+ * of ports is determined by the number of bulk out endpoints for the
+ * generic device.
+ *
+ * (01/19/2000) gkh
+ * Removed lots of cruft that was around from the old (pre urb) driver
+ * interface.
+ * Made the serial_table dynamic. This should save lots of memory when
+ * the number of minor nodes goes up to 256.
+ * Added initial support for devices that have more than one port.
+ * Added more debugging comments for the Visor, and added a needed
+ * set_configuration call.
+ *
+ * (01/17/2000) gkh
+ * Fixed the WhiteHEAT firmware (my processing tool had a bug)
+ * and added new debug loader firmware for it.
+ * Removed the put_char function as it isn't really needed.
+ * Added visor startup commands as found by the Win98 dump.
+ *
+ * (01/13/2000) gkh
+ * Fixed the vendor id for the generic driver to the one I meant it to be.
+ *
+ * (01/12/2000) gkh
+ * Forget the version numbering...that's pretty useless...
+ * Made the driver able to be compiled so that the user can select which
+ * converter they want to use. This allows people who only want the Visor
+ * support to not pay the memory size price of the WhiteHEAT.
+ * Fixed bug where the generic driver (idVendor=0000 and idProduct=0000)
+ * grabbed the root hub. Not good.
+ *
+ * version 0.4.0 (01/10/2000) gkh
+ * Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT
+ * device. Added startup function to allow firmware to be downloaded to
+ * a device if it needs to be.
+ * Added firmware download logic to the WhiteHEAT device.
+ * Started to add #defines to split up the different drivers for potential
+ * configuration option.
+ *
+ * version 0.3.1 (12/30/99) gkh
+ * Fixed problems with urb for bulk out.
+ * Added initial support for multiple sets of endpoints. This enables
+ * the Handspring Visor to be attached successfully. Only the first
+ * bulk in / bulk out endpoint pair is being used right now.
+ *
+ * version 0.3.0 (12/27/99) gkh
+ * Added initial support for the Handspring Visor based on a patch from
+ * Miles Lott (milos@sneety.insync.net)
+ * Cleaned up the code a bunch and converted over to using urbs only.
+ *
+ * version 0.2.3 (12/21/99) gkh
+ * Added initial support for the Connect Tech WhiteHEAT converter.
+ * Incremented the number of ports in expectation of getting the
+ * WhiteHEAT to work properly (4 ports per connection).
+ * Added notification on insertion and removal of what port the
+ * device is/was connected to (and what kind of device it was).
+ *
+ * version 0.2.2 (12/16/99) gkh
+ * Changed major number to the new allocated number. We're legal now!
+ *
+ * version 0.2.1 (12/14/99) gkh
+ * Fixed bug that happens when device node is opened when there isn't a
+ * device attached to it. Thanks to marek@webdesign.no for noticing this.
+ *
+ * version 0.2.0 (11/10/99) gkh
+ * Split up internals to make it easier to add different types of serial
+ * converters to the code.
+ * Added a "generic" driver that gets it's vendor and product id
+ * from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net)
+ * for the idea and sample code (from the usb scanner driver.)
+ * Cleared up any licensing questions by releasing it under the GNU GPL.
+ *
+ * version 0.1.2 (10/25/99) gkh
+ * Fixed bug in detecting device.
+ *
+ * version 0.1.1 (10/05/99) gkh
+ * Changed the major number to not conflict with anything else.
+ *
+ * version 0.1 (09/28/99) gkh
+ * Can recognize the two different devices and start up a read from
+ * device when asked to. Writes also work. No control signals yet, this
+ * all is vendor specific data (i.e. no spec), also no control for
+ * different baud rates or other bit settings.
+ * Currently we are using the same devid as the acm driver. This needs
+ * to change.
+ *
+ */
+
+#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/malloc.h>
+#include <linux/fcntl.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#define DEBUG
+#include <linux/usb.h>
+
+#ifdef CONFIG_USB_SERIAL_WHITEHEAT
+#include "whiteheat.h" /* firmware for the ConnectTech WhiteHEAT device */
+#endif
+
+#ifdef CONFIG_USB_SERIAL_KEYSPAN_PDA
+struct ezusb_hex_record {
+ __u16 address;
+ __u8 data_size;
+ __u8 data[16];
+};
+#include "keyspan_pda_fw.h"
+#endif
+
+#include "usb-serial.h"
+
+/* parity check flag */
+#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+/* local function prototypes */
+static int serial_open (struct tty_struct *tty, struct file * filp);
+static void serial_close (struct tty_struct *tty, struct file * filp);
+static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count);
+static int serial_write_room (struct tty_struct *tty);
+static int serial_chars_in_buffer (struct tty_struct *tty);
+static void serial_throttle (struct tty_struct * tty);
+static void serial_unthrottle (struct tty_struct * tty);
+static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg);
+static void serial_set_termios (struct tty_struct *tty, struct termios * old);
+
+static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum);
+static void usb_serial_disconnect(struct usb_device *dev, void *ptr);
+
+static struct usb_driver usb_serial_driver = {
+ "serial",
+ usb_serial_probe,
+ usb_serial_disconnect,
+ { NULL, NULL }
+};
+
+static int serial_refcount;
+static struct tty_struct * serial_tty[SERIAL_TTY_MINORS];
+static struct termios * serial_termios[SERIAL_TTY_MINORS];
+static struct termios * serial_termios_locked[SERIAL_TTY_MINORS];
+static struct usb_serial *serial_table[SERIAL_TTY_MINORS] = {NULL, };
+
+
+
+static struct usb_serial *get_serial_by_minor (int minor)
+{
+ dbg("get_serial_by_minor %d", minor);
+
+ return serial_table[minor];
+}
+
+
+static struct usb_serial *get_free_serial (int num_ports, int *minor)
+{
+ struct usb_serial *serial = NULL;
+ int i, j;
+ int good_spot;
+
+ dbg("get_free_serial %d", num_ports);
+
+ *minor = 0;
+ for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
+ if (serial_table[i])
+ continue;
+
+ good_spot = 1;
+ for (j = 1; j <= num_ports-1; ++j)
+ if (serial_table[i+j])
+ good_spot = 0;
+ if (good_spot == 0)
+ continue;
+
+ if (!(serial = kmalloc(sizeof(struct usb_serial), GFP_KERNEL))) {
+ err("Out of memory");
+ return NULL;
+ }
+ memset(serial, 0, sizeof(struct usb_serial));
+ serial_table[i] = serial;
+ *minor = i;
+ dbg("minor base = %d", *minor);
+ for (i = *minor+1; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
+ serial_table[i] = serial;
+ return serial;
+ }
+ return NULL;
+}
+
+
+static void return_serial (struct usb_serial *serial)
+{
+ int i;
+
+ dbg("return_serial");
+
+ if (serial == NULL)
+ return;
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ serial_table[serial->minor + i] = NULL;
+ }
+
+ return;
+}
+
+
+#ifdef USES_EZUSB_FUNCTIONS
+/* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
+#define CPUCS_REG 0x7F92
+
+static int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest)
+{
+ int result;
+ unsigned char *transfer_buffer = kmalloc (length, GFP_KERNEL);
+
+// dbg("ezusb_writememory %x, %d", address, length);
+
+ if (!transfer_buffer) {
+ err("ezusb_writememory: kmalloc(%d) failed.", length);
+ return -ENOMEM;
+ }
+ memcpy (transfer_buffer, data, length);
+ result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), bRequest, 0x40, address, 0, transfer_buffer, length, 300);
+ kfree (transfer_buffer);
+ return result;
+}
+
+
+static int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit)
+{
+ int response;
+ dbg("ezusb_set_reset: %d", reset_bit);
+ response = ezusb_writememory (serial, CPUCS_REG, &reset_bit, 1, 0xa0);
+ if (response < 0) {
+ err("ezusb_set_reset %d failed", reset_bit);
+ }
+ return response;
+}
+
+#endif /* USES_EZUSB_FUNCTIONS */
+
+
+/*****************************************************************************
+ * Driver tty interface functions
+ *****************************************************************************/
+static int serial_open (struct tty_struct *tty, struct file * filp)
+{
+ struct usb_serial *serial;
+
+ dbg("serial_open");
+
+ /* initialize the pointer incase something fails */
+ tty->driver_data = NULL;
+
+ /* get the serial object associated with this tty pointer */
+ serial = get_serial_by_minor (MINOR(tty->device));
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return (-ENODEV);
+ }
+
+ /* make the tty driver remember our serial object, and us it */
+ tty->driver_data = serial;
+ serial->tty = tty;
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->open) {
+ return (serial->type->open(tty, filp));
+ } else {
+ return (generic_serial_open(tty, filp));
+ }
+}
+
+
+static void serial_close(struct tty_struct *tty, struct file * filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port;
+
+ dbg("serial_close");
+
+ if (!serial) {
+ dbg("serial == NULL!");
+ return;
+ }
+
+ port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_close port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not opened");
+ return;
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->close) {
+ serial->type->close(tty, filp);
+ } else {
+ generic_serial_close(tty, filp);
+ }
+}
+
+
+static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_write port %d, %d byte(s)", port, count);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not opened");
+ return (-EINVAL);
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->write) {
+ return (serial->type->write(tty, from_user, buf, count));
+ } else {
+ return (generic_serial_write(tty, from_user, buf, count));
+ }
+}
+
+
+static int serial_write_room (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_write_room port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return (-EINVAL);
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->write_room) {
+ return (serial->type->write_room(tty));
+ } else {
+ return (generic_write_room(tty));
+ }
+}
+
+
+static int serial_chars_in_buffer (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_chars_in_buffer port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return (-ENODEV);
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return (-EINVAL);
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->chars_in_buffer) {
+ return (serial->type->chars_in_buffer(tty));
+ } else {
+ return (generic_chars_in_buffer(tty));
+ }
+}
+
+
+static void serial_throttle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_throttle port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return;
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return;
+ }
+
+ /* pass on to the driver specific version of this function */
+ if (serial->type->throttle) {
+ serial->type->throttle(tty);
+ } else {
+ generic_throttle(tty);
+ }
+
+ return;
+}
+
+
+static void serial_unthrottle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_unthrottle port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial) {
+ dbg("serial == NULL!");
+ return;
+ }
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return;
+ }
+
+ /* pass on to the driver specific version of this function */
+ if (serial->type->unthrottle) {
+ serial->type->unthrottle(tty);
+ } else {
+ generic_unthrottle(tty);
+ }
+
+ return;
+}
+
+
+static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port;
+
+ dbg("serial_ioctl");
+
+ if (!serial) {
+ dbg("serial == NULL!");
+ return -ENODEV;
+ }
+
+ port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_ioctl port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return -ENODEV;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return -ENODEV;
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->ioctl) {
+ return (serial->type->ioctl(tty, file, cmd, arg));
+ } else {
+ return (generic_ioctl (tty, file, cmd, arg));
+ }
+}
+
+
+static void serial_set_termios (struct tty_struct *tty, struct termios * old)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port;
+
+ dbg("serial_set_termios");
+
+ if (!serial) {
+ dbg("serial == NULL!");
+ return;
+ }
+
+ port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_set_termios port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return;
+ }
+
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->set_termios) {
+ serial->type->set_termios(tty, old);
+ } else {
+ generic_set_termios (tty, old);
+ }
+
+ return;
+}
+
+
+static void serial_break (struct tty_struct *tty, int break_state)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port;
+
+ if (!serial) {
+ dbg("serial == NULL!");
+ return;
+ }
+
+ port = MINOR(tty->device) - serial->minor;
+
+ dbg("serial_break port %d", port);
+
+ /* do some sanity checking that we really have a device present */
+ if (!serial->type) {
+ dbg("serial->type == NULL!");
+ return;
+ }
+ if (!serial->port[port].active) {
+ dbg ("device not open");
+ return;
+ }
+
+ /* pass on to the driver specific version of this function if it is
+ available */
+ if (serial->type->break_ctl) {
+ serial->type->break_ctl(tty, break_state);
+ }
+}
+
+
+#ifdef CONFIG_USB_SERIAL_WHITEHEAT
+/*****************************************************************************
+ * Connect Tech's White Heat specific driver functions
+ *****************************************************************************/
+static int whiteheat_serial_open (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("whiteheat_serial_open port %d", portNumber);
+
+ if (port->active) {
+ dbg ("device already open");
+ return -EINVAL;
+ }
+ port->active = 1;
+
+ /*Start reading from the device*/
+ if (usb_submit_urb(&port->read_urb))
+ dbg("usb_submit_urb(read bulk) failed");
+
+ /* Need to do device specific setup here (control lines, baud rate, etc.) */
+ /* FIXME!!! */
+
+ return (0);
+}
+
+
+static void whiteheat_serial_close(struct tty_struct *tty, struct file * filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("whiteheat_serial_close port %d", portNumber);
+
+ /* Need to change the control lines here */
+ /* FIXME */
+
+ /* shutdown our bulk reads and writes */
+ usb_unlink_urb (&port->write_urb);
+ usb_unlink_urb (&port->read_urb);
+ port->active = 0;
+}
+
+
+static void whiteheat_set_termios (struct tty_struct *tty, struct termios *old_termios)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+ unsigned int cflag = tty->termios->c_cflag;
+
+ dbg("whiteheat_set_termios port %d", port);
+
+ /* check that they really want us to change something */
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
+ dbg("nothing to change...");
+ return;
+ }
+ }
+
+ /* do the parsing of the cflag to see what to set the line to */
+ /* FIXME!! */
+
+ return;
+}
+
+static void whiteheat_throttle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("whiteheat_throttle port %d", port);
+
+ /* Change the control signals */
+ /* FIXME!!! */
+
+ return;
+}
+
+
+static void whiteheat_unthrottle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("whiteheat_unthrottle port %d", port);
+
+ /* Change the control signals */
+ /* FIXME!!! */
+
+ return;
+}
+
+
+/* steps to download the firmware to the WhiteHEAT device:
+ - hold the reset (by writing to the reset bit of the CPUCS register)
+ - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
+ - release the reset (by writing to the CPUCS register)
+ - download the WH.HEX file for all addresses greater than 0x1b3f using
+ VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
+ - hold the reset
+ - download the WH.HEX file for all addresses less than 0x1b40 using
+ VENDOR_REQUEST_ANCHOR_LOAD
+ - release the reset
+ - device renumerated itself and comes up as new device id with all
+ firmware download completed.
+*/
+static int whiteheat_startup (struct usb_serial *serial)
+{
+ int response;
+ const struct whiteheat_hex_record *record;
+
+ dbg("whiteheat_startup");
+
+ response = ezusb_set_reset (serial, 1);
+
+ record = &whiteheat_loader[0];
+ while (record->address != 0xffff) {
+ response = ezusb_writememory (serial, record->address,
+ (unsigned char *)record->data, record->data_size, 0xa0);
+ if (response < 0) {
+ err("ezusb_writememory failed for loader (%d %04X %p %d)",
+ response, record->address, record->data, record->data_size);
+ break;
+ }
+ ++record;
+ }
+
+ response = ezusb_set_reset (serial, 0);
+
+ record = &whiteheat_firmware[0];
+ while (record->address < 0x1b40) {
+ ++record;
+ }
+ while (record->address != 0xffff) {
+ response = ezusb_writememory (serial, record->address,
+ (unsigned char *)record->data, record->data_size, 0xa0);
+ if (response < 0) {
+ err("ezusb_writememory failed for first firmware step (%d %04X %p %d)",
+ response, record->address, record->data, record->data_size);
+ break;
+ }
+ ++record;
+ }
+
+ response = ezusb_set_reset (serial, 1);
+
+ record = &whiteheat_firmware[0];
+ while (record->address < 0x1b40) {
+ response = ezusb_writememory (serial, record->address,
+ (unsigned char *)record->data, record->data_size, 0xa0);
+ if (response < 0) {
+ err("ezusb_writememory failed for second firmware step (%d %04X %p %d)",
+ response, record->address, record->data, record->data_size);
+ break;
+ }
+ ++record;
+ }
+
+ response = ezusb_set_reset (serial, 0);
+
+ /* we want this device to fail to have a driver assigned to it. */
+ return (1);
+}
+#endif /* CONFIG_USB_SERIAL_WHITEHEAT */
+
+
+#ifdef CONFIG_USB_SERIAL_VISOR
+/******************************************************************************
+ * Handspring Visor specific driver functions
+ ******************************************************************************/
+static int visor_serial_open (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("visor_serial_open port %d", portNumber);
+
+ if (port->active) {
+ dbg ("device already open");
+ return -EINVAL;
+ }
+
+ port->active = 1;
+
+ /*Start reading from the device*/
+ if (usb_submit_urb(&port->read_urb))
+ dbg("usb_submit_urb(read bulk) failed");
+
+ return (0);
+}
+
+static void visor_serial_close(struct tty_struct *tty, struct file * filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ unsigned char *transfer_buffer = kmalloc (0x12, GFP_KERNEL);
+
+ dbg("visor_serial_close port %d", portNumber);
+
+ if (!transfer_buffer) {
+ err("visor_serial_close: kmalloc(%d) failed.", 0x12);
+ } else {
+ /* send a shutdown message to the device */
+ usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_CLOSE_NOTIFICATION,
+ 0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300);
+ }
+
+ /* shutdown our bulk reads and writes */
+ usb_unlink_urb (&port->write_urb);
+ usb_unlink_urb (&port->read_urb);
+ port->active = 0;
+}
+
+
+static void visor_throttle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("visor_throttle port %d", port);
+
+ usb_unlink_urb (&serial->port[port].read_urb);
+
+ return;
+}
+
+
+static void visor_unthrottle (struct tty_struct * tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ dbg("visor_unthrottle port %d", port);
+
+ if (usb_unlink_urb (&serial->port[port].read_urb))
+ dbg("usb_submit_urb(read bulk) failed");
+
+ return;
+}
+
+
+static int visor_startup (struct usb_serial *serial)
+{
+ int response;
+ int i;
+ unsigned char *transfer_buffer = kmalloc (256, GFP_KERNEL);
+
+ if (!transfer_buffer) {
+ err("visor_startup: kmalloc(%d) failed.", 256);
+ return -ENOMEM;
+ }
+
+ dbg("visor_startup");
+
+ dbg("visor_setup: Set config to 1");
+ usb_set_configuration (serial->dev, 1);
+
+ /* send a get connection info request */
+ response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_GET_CONNECTION_INFORMATION,
+ 0xc2, 0x0000, 0x0000, transfer_buffer, 0x12, 300);
+ if (response < 0) {
+ err("visor_startup: error getting connection information");
+ } else {
+ struct visor_connection_info *connection_info = (struct visor_connection_info *)transfer_buffer;
+ char *string;
+ info("%s: Number of ports: %d", serial->type->name, connection_info->num_ports);
+ for (i = 0; i < connection_info->num_ports; ++i) {
+ switch (connection_info->connections[i].port_function_id) {
+ case VISOR_FUNCTION_GENERIC:
+ string = "Generic";
+ break;
+ case VISOR_FUNCTION_DEBUGGER:
+ string = "Debugger";
+ break;
+ case VISOR_FUNCTION_HOTSYNC:
+ string = "HotSync";
+ break;
+ case VISOR_FUNCTION_CONSOLE:
+ string = "Console";
+ break;
+ case VISOR_FUNCTION_REMOTE_FILE_SYS:
+ string = "Remote File System";
+ break;
+ default:
+ string = "unknown";
+ break;
+ }
+ info("%s: port %d, is for %s use and is bound to ttyUSB%d", serial->type->name, connection_info->connections[i].port, string, serial->minor + i);
+ }
+ }
+
+ /* ask for the number of bytes available, but ignore the response as it is broken */
+ response = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), VISOR_REQUEST_BYTES_AVAILABLE,
+ 0xc2, 0x0000, 0x0005, transfer_buffer, 0x02, 300);
+ if (response < 0) {
+ err("visor_startup: error getting bytes available request");
+ }
+
+ kfree (transfer_buffer);
+
+ /* continue on with initialization */
+ return (0);
+}
+
+
+#endif /* CONFIG_USB_SERIAL_VISOR*/
+
+
+#ifdef CONFIG_USB_SERIAL_FTDI_SIO
+/******************************************************************************
+ * FTDI SIO Serial Converter specific driver functions
+ ******************************************************************************/
+
+/* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
+/* Thanx to FTDI for so kindly providing details of the protocol required */
+/* to talk to the device */
+
+#include "ftdi_sio.h"
+
+static int ftdi_sio_serial_open (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ char buf[1]; /* Needed for the usb_control_msg I think */
+
+ dbg("ftdi_sio_serial_open port %d", portNumber);
+
+ if (port->active) {
+ dbg ("device already open");
+ return -EINVAL;
+ }
+ port->active = 1;
+
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
+ FTDI_SIO_RESET_SIO,
+ 0, buf, 0, HZ * 5);
+
+ /* FIXME - Should I really purge the buffers? */
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
+ FTDI_SIO_RESET_PURGE_RX,
+ 0, buf, 0, HZ * 5);
+
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
+ FTDI_SIO_RESET_PURGE_TX,
+ 0, buf, 0, HZ * 5);
+
+
+ /* As per usb_serial_init s/be CS8, B9600, 1 STOP BIT */
+ if ( usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_BAUDRATE_REQUEST,
+ FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
+ ftdi_sio_b9600, 0,
+ buf, 0, HZ * 5) < 0){
+ dbg("Error from baudrate urb");
+ return(-EINVAL);
+ }
+
+ if ( usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_DATA_REQUEST,
+ FTDI_SIO_SET_DATA_REQUEST_TYPE,
+ 8 | FTDI_SIO_SET_DATA_PARITY_NONE |
+ FTDI_SIO_SET_DATA_STOP_BITS_1, 0,
+ buf, 0, HZ * 5) < 0){
+ dbg("Error from cs8/noparity/1 stopbit urb");
+ return(-EINVAL);
+ }
+
+ /* Disable flow control */
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST,
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
+ 0, 0,
+ buf, 0, HZ * 5) < 0) {
+ dbg("error from flowcontrol urb");
+ return(-EINVAL);
+ }
+
+ /* Turn on RTS and DTR since we are not flow controlling*/
+ /* FIXME - check for correct behaviour clocal vs non clocal */
+ /* FIXME - might be able to do both simultaneously */
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST,
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ (unsigned)FTDI_SIO_SET_DTR_HIGH, 0,
+ buf, 0, HZ * 5) < 0) {
+ dbg("Error from DTR HIGH urb");
+ }
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST,
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ (unsigned)FTDI_SIO_SET_RTS_HIGH, 0,
+ buf, 0, HZ * 5) < 0) {
+ dbg("Error from RTS HIGH urb");
+ }
+
+ /*Start reading from the device*/
+ if (usb_submit_urb(&port->read_urb))
+ dbg("usb_submit_urb(read bulk) failed");
+
+ return (0);
+}
+
+
+static void ftdi_sio_serial_close (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ char buf[1];
+
+ dbg("ftdi_sio_serial_close port %d", portNumber);
+
+ /* FIXME - might be able to do both simultaneously */
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST,
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ (unsigned)FTDI_SIO_SET_DTR_LOW, 0,
+ buf, 0, HZ * 5) < 0) {
+ dbg("Error from DTR LOW urb");
+ }
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST,
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ (unsigned)FTDI_SIO_SET_RTS_LOW, 0,
+ buf, 0, HZ * 5) < 0) {
+ dbg("Error from RTS LOW urb");
+ }
+
+ /* FIXME Should I flush the device here? - not doing it for now */
+
+ /* shutdown our bulk reads and writes */
+ usb_unlink_urb (&port->write_urb);
+ usb_unlink_urb (&port->read_urb);
+ port->active = 0;
+}
+
+
+
+/* The ftdi_sio requires the first byte to have:
+ B0 1
+ B1 0
+ B2..7 length of message excluding byte 0
+*/
+static int ftdi_sio_serial_write (struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ const int data_offset = 1;
+
+ dbg("ftdi_sio_serial_write port %d, %d bytes", portNumber, count);
+
+ if (count == 0) {
+ dbg("write request of 0 bytes");
+ return 0;
+ }
+
+ /* only do something if we have a bulk out endpoint */
+ if (serial->num_bulk_out) {
+ unsigned char *first_byte = port->write_urb.transfer_buffer;
+
+ if (port->write_urb.status == -EINPROGRESS) {
+ dbg ("already writing");
+ return 0;
+ }
+
+ count += data_offset;
+ count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
+ if (count == 0) {
+ return 0;
+ }
+
+ /* Copy in the data to send */
+ if (from_user) {
+ copy_from_user(port->write_urb.transfer_buffer + data_offset ,
+ buf, count - data_offset );
+ }
+ else {
+ memcpy(port->write_urb.transfer_buffer + data_offset,
+ buf, count - data_offset );
+ }
+
+ /* Write the control byte at the front of the packet*/
+ first_byte = port->write_urb.transfer_buffer;
+ *first_byte = 1 | ((count-data_offset) << 2) ;
+
+#ifdef DEBUG
+ dbg("Bytes: %d, Control Byte: 0o%03o",count, first_byte[0]);
+
+ if (count) {
+ int i;
+ printk (KERN_DEBUG __FILE__ ": data written - length = %d, data = ", count);
+ for (i = 0; i < count; ++i) {
+ printk ("0x%02x ", first_byte[i]);
+ if (first_byte[i] > ' ' && first_byte[i] < '~') {
+ printk("%c ", first_byte[i]);
+ } else {
+ printk(" ");
+ }
+ }
+
+
+ printk ("\n");
+ }
+
+#endif
+ /* send the data out the bulk port */
+ port->write_urb.transfer_buffer_length = count;
+
+ if (usb_submit_urb(&port->write_urb))
+ dbg("usb_submit_urb(write bulk) failed");
+
+ dbg("write returning: %d", count - data_offset);
+ return (count - data_offset);
+ }
+
+ /* no bulk out, so return 0 bytes written */
+ return 0;
+}
+
+
+static void ftdi_sio_read_bulk_callback (struct urb *urb)
+{ /* ftdi_sio_serial_buld_callback */
+ struct usb_serial *serial = (struct usb_serial *)urb->context;
+ struct tty_struct *tty = serial->tty;
+ unsigned char *data = urb->transfer_buffer;
+ const int data_offset = 2;
+ int i;
+
+ dbg("ftdi_sio_read_bulk_callback");
+
+ if (urb->status) {
+ dbg("nonzero read bulk status received: %d", urb->status);
+ return;
+ }
+
+#ifdef DEBUG
+ if (urb->actual_length > 2) {
+ printk (KERN_DEBUG __FILE__ ": data read - length = %d, data = ", urb->actual_length);
+ for (i = 0; i < urb->actual_length; ++i) {
+ printk ("0x%.2x ", data[i]);
+ if (data[i] > ' ' && data[i] < '~') {
+ printk("%c ", data[i]);
+ } else {
+ printk(" ");
+ }
+ }
+ printk ("\n");
+ }
+#endif
+
+
+ if (urb->actual_length > data_offset) {
+ for (i = data_offset ; i < urb->actual_length ; ++i) {
+ tty_insert_flip_char(tty, data[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ }
+
+ /* Continue trying to always read */
+ if (usb_submit_urb(urb))
+ dbg("failed resubmitting read urb");
+
+ return;
+} /* ftdi_sio_serial_read_bulk_callback */
+
+
+static void ftdi_sio_set_termios (struct tty_struct *tty, struct termios *old_termios)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+ unsigned int cflag = tty->termios->c_cflag;
+ __u16 urb_value; /* Will hold the new flags */
+ char buf[1]; /* Perhaps I should dynamically alloc this? */
+ dbg("ftdi_sio_set_termios port %d", port);
+
+ /* FIXME - we should keep the old termios really */
+ /* FIXME -For this cut I don't care if the line is really changing or
+ not - so just do the change regardless */
+
+ /* Set number of data bits, parity, stop bits */
+
+ urb_value = 0;
+ urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
+ FTDI_SIO_SET_DATA_STOP_BITS_1);
+ urb_value |= (cflag & PARENB ?
+ (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
+ FTDI_SIO_SET_DATA_PARITY_EVEN) :
+ FTDI_SIO_SET_DATA_PARITY_NONE);
+ if (cflag & CSIZE) {
+ switch (cflag & CSIZE) {
+ case CS5: urb_value |= 5; dbg("Setting CS5"); break;
+ case CS6: urb_value |= 6; dbg("Setting CS6"); break;
+ case CS7: urb_value |= 7; dbg("Setting CS7"); break;
+ case CS8: urb_value |= 8; dbg("Setting CS8"); break;
+ default:
+ dbg("CSIZE was set but not CS5-CS8");
+ }
+ }
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_DATA_REQUEST,
+ FTDI_SIO_SET_DATA_REQUEST_TYPE,
+ urb_value , 0,
+ buf, 0, 100) < 0) {
+ dbg("FAILED to set databits/stopbits/parity");
+ }
+
+ /* Now do the baudrate */
+ /* FIXME - should drop lines on B0 */
+ /* FIXME Should also handle CLOCAL here */
+
+ switch(cflag & CBAUD){
+ case B300: urb_value = ftdi_sio_b300; dbg("Set to 300"); break;
+ case B600: urb_value = ftdi_sio_b600; dbg("Set to 600") ; break;
+ case B1200: urb_value = ftdi_sio_b1200; dbg("Set to 1200") ; break;
+ case B2400: urb_value = ftdi_sio_b2400; dbg("Set to 2400") ; break;
+ case B4800: urb_value = ftdi_sio_b4800; dbg("Set to 4800") ; break;
+ case B9600: urb_value = ftdi_sio_b9600; dbg("Set to 9600") ; break;
+ case B19200: urb_value = ftdi_sio_b19200; dbg("Set to 19200") ; break;
+ case B38400: urb_value = ftdi_sio_b38400; dbg("Set to 38400") ; break;
+ case B57600: urb_value = ftdi_sio_b57600; dbg("Set to 57600") ; break;
+ case B115200: urb_value = ftdi_sio_b115200; dbg("Set to 115200") ; break;
+ default: dbg("FTDI_SIO does not support the baudrate requested");
+ /* FIXME - how to return an error for this? */ break;
+ }
+ /* Send the URB */
+ if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_BAUDRATE_REQUEST,
+ FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
+ urb_value, 0,
+ buf, 0, 100) < 0) {
+ dbg("urb failed to set baurdrate");
+ }
+ return;
+}
+
+
+/*FIXME - the beginnings of this implementation - not even hooked into the driver yet */
+static int ftdi_sio_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+ __u16 urb_value=0; /* Will hold the new flags */
+ char buf[1];
+ int ret, mask;
+ dbg("ftdi_sio_ioctl port %d", port);
+
+ /* Based on code from acm.c */
+ switch (cmd) {
+
+ case TIOCMGET:
+ /* Request the status from the device */
+ if ((ret = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_GET_MODEM_STATUS_REQUEST,
+ FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
+ 0, 0,
+ buf, 1, HZ * 5)) < 0 ) {
+ dbg("Get not get modem status of device");
+ return(ret);
+ }
+
+ return put_user((buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
+ (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
+ (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
+ (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0),
+ (unsigned long *) arg);
+ break;
+
+ case TIOCMSET:
+ case TIOCMBIS:
+ case TIOCMBIC:
+ if ((ret = get_user(mask, (unsigned long *) arg))) return ret;
+
+ /* FIXME Need to remember if we have set DTR or RTS since we
+ can't ask the device */
+ /* FIXME - also need to find the meaning of TIOCMBIS/BIC/SET */
+ if (mask & TIOCM_DTR) {
+ switch(cmd) {
+ case TIOCMSET:
+ urb_value = FTDI_SIO_SET_DTR_HIGH | FTDI_SIO_SET_RTS_LOW;
+ break;
+
+ case TIOCMBIS:
+ /* Will leave RTS alone and set DTR */
+ urb_value = FTDI_SIO_SET_DTR_HIGH;
+ break;
+
+ case TIOCMBIC:
+ urb_value = FTDI_SIO_SET_DTR_LOW;
+ break;
+ }
+ }
+
+ if (mask & TIOCM_RTS) {
+ switch(cmd) {
+ case TIOCMSET:
+ urb_value = FTDI_SIO_SET_DTR_LOW | FTDI_SIO_SET_RTS_HIGH;
+ break;
+
+ case TIOCMBIS:
+ /* Will leave DTR and set RTS */
+ urb_value = FTDI_SIO_SET_RTS_HIGH;
+ break;
+
+ case TIOCMBIC:
+ /* Will unset RTS */
+ urb_value = FTDI_SIO_SET_RTS_LOW;
+ break;
+ }
+ }
+
+
+ return(usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST,
+ FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
+ urb_value , 0,
+ buf, 0, HZ * 5));
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+#endif /* CONFIG_USB_SERIAL_FTDI_SIO */
+
+
+#ifdef CONFIG_USB_SERIAL_KEYSPAN_PDA
+/*****************************************************************************
+ * Keyspan PDA specific driver functions
+ *****************************************************************************/
+
+static void keyspan_pda_rx_interrupt (struct urb *urb)
+{
+ struct usb_serial *serial = (struct usb_serial *) urb->context;
+ struct tty_struct *tty = serial->tty;
+ unsigned char *data = urb->transfer_buffer;
+ int i;
+
+ /* the urb might have been killed. */
+ if (urb->status)
+ return;
+
+ /* see if the message is data or a status interrupt */
+ switch (data[0]) {
+ case 0:
+ /* rest of message is rx data */
+ if (urb->actual_length) {
+ for (i = 1; i < urb->actual_length ; ++i) {
+ tty_insert_flip_char(tty, data[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ }
+ break;
+ case 1:
+ /* status interrupt */
+ dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
+ switch (data[1]) {
+ case 1: /* modemline change */
+ break;
+ case 2: /* tx unthrottle interrupt */
+ serial->tx_throttled = 0;
+ wake_up(&serial->write_wait); /* wake up writer */
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* INT urbs are automatically re-submitted */
+}
+
+
+static void keyspan_pda_rx_throttle (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ /* stop receiving characters. We just turn off the URB request, and
+ let chars pile up in the device. If we're doing hardware
+ flowcontrol, the device will signal the other end when its buffer
+ fills up. If we're doing XON/XOFF, this would be a good time to
+ send an XOFF, although it might make sense to foist that off
+ upon the device too. */
+
+ dbg("keyspan_pda_rx_throttle port %d", port);
+ usb_unlink_urb(&serial->port[port].read_urb);
+}
+
+
+static void keyspan_pda_rx_unthrottle (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+
+ /* just restart the receive interrupt URB */
+ dbg("keyspan_pda_rx_unthrottle port %d", port);
+ if (usb_submit_urb(&serial->port[port].read_urb))
+ dbg(" usb_submit_urb(read urb) failed");
+ return;
+}
+
+
+static int keyspan_pda_setbaud (struct usb_serial *serial, int baud)
+{
+ int rc;
+ int bindex;
+
+ switch(baud) {
+ case 110: bindex = 0; break;
+ case 300: bindex = 1; break;
+ case 1200: bindex = 2; break;
+ case 2400: bindex = 3; break;
+ case 4800: bindex = 4; break;
+ case 9600: bindex = 5; break;
+ case 19200: bindex = 6; break;
+ case 38400: bindex = 7; break;
+ case 57600: bindex = 8; break;
+ case 115200: bindex = 9; break;
+ default: return -EINVAL;
+ }
+
+ /* rather than figure out how to sleep while waiting for this
+ to complete, I just use the "legacy" API. */
+ rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ 0, /* set baud */
+ USB_TYPE_VENDOR
+ | USB_RECIP_INTERFACE
+ | USB_DIR_OUT, /* type */
+ bindex, /* value */
+ 0, /* index */
+ NULL, /* &data */
+ 0, /* size */
+ 2*HZ); /* timeout */
+ return(rc);
+}
+
+
+static void keyspan_pda_break_ctl (struct tty_struct *tty, int break_state)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int value;
+ if (break_state == -1)
+ value = 1; /* start break */
+ else
+ value = 0; /* clear break */
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ 4, /* set break */
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ value, 0, NULL, 0, 2*HZ);
+ /* there is something funky about this.. the TCSBRK that 'cu' performs
+ ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
+ seconds apart, but it feels like the break sent isn't as long as it
+ is on /dev/ttyS0 */
+}
+
+
+static void keyspan_pda_set_termios (struct tty_struct *tty,
+ struct termios *old_termios)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ unsigned int cflag = tty->termios->c_cflag;
+
+ /* cflag specifies lots of stuff: number of stop bits, parity, number
+ of data bits, baud. What can the device actually handle?:
+ CSTOPB (1 stop bit or 2)
+ PARENB (parity)
+ CSIZE (5bit .. 8bit)
+ There is minimal hw support for parity (a PSW bit seems to hold the
+ parity of whatever is in the accumulator). The UART either deals
+ with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
+ 1 special, stop). So, with firmware changes, we could do:
+ 8N1: 10 bit
+ 8N2: 11 bit, extra bit always (mark?)
+ 8[EOMS]1: 11 bit, extra bit is parity
+ 7[EOMS]1: 10 bit, b0/b7 is parity
+ 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
+
+ HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
+ bit.
+
+ For now, just do baud. */
+
+ switch (cflag & CBAUD) {
+ /* we could support more values here, just need to calculate
+ the necessary divisors in the firmware. <asm/termbits.h>
+ has the Bnnn constants. */
+ case B110: keyspan_pda_setbaud(serial, 110); break;
+ case B300: keyspan_pda_setbaud(serial, 300); break;
+ case B1200: keyspan_pda_setbaud(serial, 1200); break;
+ case B2400: keyspan_pda_setbaud(serial, 2400); break;
+ case B4800: keyspan_pda_setbaud(serial, 4800); break;
+ case B9600: keyspan_pda_setbaud(serial, 9600); break;
+ case B19200: keyspan_pda_setbaud(serial, 19200); break;
+ case B38400: keyspan_pda_setbaud(serial, 38400); break;
+ case B57600: keyspan_pda_setbaud(serial, 57600); break;
+ case B115200: keyspan_pda_setbaud(serial, 115200); break;
+ default: dbg("can't handle requested baud rate"); break;
+ }
+}
+
+
+/* modem control pins: DTR and RTS are outputs and can be controlled.
+ DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
+ read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
+
+static int keyspan_pda_get_modem_info(struct usb_serial *serial,
+ unsigned char *value)
+{
+ int rc;
+ unsigned char data;
+ rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ 3, /* get pins */
+ USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
+ 0, 0, &data, 1, 2*HZ);
+ if (rc > 0)
+ *value = data;
+ return rc;
+}
+
+
+static int keyspan_pda_set_modem_info(struct usb_serial *serial,
+ unsigned char value)
+{
+ int rc;
+ rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ 3, /* set pins */
+ USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
+ value, 0, NULL, 0, 2*HZ);
+ return rc;
+}
+
+
+static int keyspan_pda_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int rc;
+ unsigned int value;
+ unsigned char status, mask;
+
+ switch (cmd) {
+ case TIOCMGET: /* get modem pins state */
+ rc = keyspan_pda_get_modem_info(serial, &status);
+ if (rc < 0)
+ return rc;
+ value =
+ ((status & (1<<7)) ? TIOCM_DTR : 0) |
+ ((status & (1<<6)) ? TIOCM_CAR : 0) |
+ ((status & (1<<5)) ? TIOCM_RNG : 0) |
+ ((status & (1<<4)) ? TIOCM_DSR : 0) |
+ ((status & (1<<3)) ? TIOCM_CTS : 0) |
+ ((status & (1<<2)) ? TIOCM_RTS : 0);
+ if (copy_to_user((unsigned int *)arg, &value, sizeof(int)))
+ return -EFAULT;
+ return 0;
+ case TIOCMSET: /* set a state as returned by MGET */
+ if (copy_from_user(&value, (unsigned int *)arg, sizeof(int)))
+ return -EFAULT;
+ status =
+ ((value & TIOCM_DTR) ? (1<<7) : 0) |
+ ((value & TIOCM_CAR) ? (1<<6) : 0) |
+ ((value & TIOCM_RNG) ? (1<<5) : 0) |
+ ((value & TIOCM_DSR) ? (1<<4) : 0) |
+ ((value & TIOCM_CTS) ? (1<<3) : 0) |
+ ((value & TIOCM_RTS) ? (1<<2) : 0);
+ rc = keyspan_pda_set_modem_info(serial, status);
+ if (rc < 0)
+ return rc;
+ return 0;
+ case TIOCMBIS: /* set bits in bitmask <arg> */
+ case TIOCMBIC: /* clear bits from bitmask <arg> */
+ if (copy_from_user(&value, (unsigned int *)arg, sizeof(int)))
+ return -EFAULT;
+ rc = keyspan_pda_get_modem_info(serial, &status);
+ if (rc < 0)
+ return rc;
+ mask =
+ ((value & TIOCM_RTS) ? (1<<2) : 0) |
+ ((value & TIOCM_DTR) ? (1<<7) : 0);
+ if (cmd == TIOCMBIS)
+ status |= mask;
+ else
+ status &= ~mask;
+ rc = keyspan_pda_set_modem_info(serial, status);
+ if (rc < 0)
+ return rc;
+ return 0;
+ case TIOCMIWAIT:
+ /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
+ /* TODO */
+ case TIOCGICOUNT:
+ /* return count of modemline transitions */
+ return 0; /* TODO */
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int keyspan_pda_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int port = MINOR(tty->device) - serial->minor;
+ int request_unthrottle = 0;
+ int rc = 0;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* guess how much room is left in the device's ring buffer, and if we
+ want to send more than that, check first, updating our notion of
+ what is left. If our write will result in no room left, ask the
+ device to give us an interrupt when the room available rises above
+ a threshold, and hold off all writers (eventually, those using
+ select() or poll() too) until we receive that unthrottle interrupt.
+ Block if we can't write anything at all, otherwise write as much as
+ we can. */
+
+ if (count == 0) {
+ dbg(" write request of 0 bytes");
+ return (0);
+ }
+
+ /* we might block because of:
+ the TX urb is in-flight (wait until it completes)
+ the device is full (wait until it says there is room)
+ */
+ while (serial->port[port].write_urb.status == -EINPROGRESS) {
+ if (0 /* file->f_flags & O_NONBLOCK */) {
+ rc = -EAGAIN;
+ goto err;
+ }
+ interruptible_sleep_on(&serial->write_wait);
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ goto err;
+ }
+ }
+
+ /* at this point the URB is in our control, nobody else can submit it
+ again (the only sudden transition was the one from EINPROGRESS to
+ finished) */
+
+ /* the next potential block is that our TX process might be throttled.
+ The transition from throttled->not happens because of an Rx
+ interrupt, and the wake_up occurs during the same interrupt, so we
+ have to be careful to avoid a race that would cause us to sleep
+ forever. */
+
+ add_wait_queue(&serial->write_wait, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ while (serial->tx_throttled) {
+ /* device can't accomodate any more characters. Sleep until it
+ can. Woken up by an Rx interrupt message, which clears
+ tx_throttled first. */
+ dbg(" tx_throttled, going to sleep");
+ if (signal_pending(current)) {
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&serial->write_wait, &wait);
+ dbg(" woke up because of signal");
+ rc = -ERESTARTSYS;
+ goto err;
+ }
+ schedule();
+ dbg(" woke up");
+ }
+ remove_wait_queue(&serial->write_wait, &wait);
+ set_current_state(TASK_RUNNING);
+
+ count = (count > serial->port[port].bulk_out_size) ?
+ serial->port[port].bulk_out_size : count;
+ if (count > serial->tx_room) {
+ unsigned char room;
+ /* Looks like we might overrun the Tx buffer. Ask the device
+ how much room it really has */
+ rc = usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev, 0),
+ 6, /* write_room */
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE
+ | USB_DIR_IN,
+ 0, /* value: 0 means "remaining room" */
+ 0, /* index */
+ &room,
+ 1,
+ 2*HZ);
+ if (rc < 0) {
+ dbg(" roomquery failed");
+ return rc; /* failed */
+ }
+ if (rc == 0) {
+ dbg(" roomquery returned 0 bytes");
+ return -EIO; /* device didn't return any data */
+ }
+ dbg(" roomquery says %d", room);
+ serial->tx_room = room;
+ if (count > serial->tx_room) {
+ /* we're about to completely fill the Tx buffer, so
+ we'll be throttled afterwards. */
+ count = serial->tx_room;
+ request_unthrottle = 1;
+ }
+ }
+ serial->tx_room -= count;
+
+ if (count) {
+ /* now transfer data */
+ if (from_user) {
+ copy_from_user(serial->port[port].write_urb.transfer_buffer,
+ buf, count);
+ }
+ else {
+ memcpy (serial->port[port].write_urb.transfer_buffer,
+ buf, count);
+ }
+ /* send the data out the bulk port */
+ serial->port[port].write_urb.transfer_buffer_length = count;
+
+ if (usb_submit_urb(&serial->port[port].write_urb))
+ dbg(" usb_submit_urb(write bulk) failed");
+ }
+ else {
+ /* There wasn't any room left, so we are throttled until
+ the buffer empties a bit */
+ request_unthrottle = 1;
+ }
+
+ if (request_unthrottle) {
+ dbg(" request_unthrottle");
+ /* ask the device to tell us when the tx buffer becomes
+ sufficiently empty */
+ serial->tx_throttled = 1; /* block writers */
+ rc = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ 7, /* request_unthrottle */
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE
+ | USB_DIR_OUT,
+ 16, /* value: threshold */
+ 0, /* index */
+ NULL,
+ 0,
+ 2*HZ);
+ }
+
+ return (count);
+ err:
+ return (rc);
+}
+
+
+static void keyspan_pda_write_bulk_callback (struct urb *urb)
+{
+ struct usb_serial *serial = (struct usb_serial *) urb->context;
+ struct tty_struct *tty = serial->tty;
+
+ wake_up_interruptible(&serial->write_wait);
+
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+
+ wake_up_interruptible(&tty->write_wait);
+}
+
+
+static int keyspan_pda_write_room (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+
+ /* used by n_tty.c for processing of tabs and such. Giving it our
+ conservative guess is probably good enough, but needs testing by
+ running a console through the device. */
+
+ return (serial->tx_room);
+}
+
+
+static int keyspan_pda_chars_in_buffer (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+ unsigned char count;
+ int rc;
+
+ /* used by tty stuff to wait for output to drain. Go ask the
+ device how much is still queued in the tx ring */
+ rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ 6, /* write_room */
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE
+ | USB_DIR_IN,
+ 1, /* value: 1 means chars_in_buffer */
+ 0, /* index */
+ &count,
+ 1,
+ 2*HZ);
+ if (rc < 0)
+ return rc; /* failed */
+ if (rc == 0)
+ return -EIO; /* device didn't return any data */
+ return (count);
+}
+
+
+static int keyspan_pda_serial_open (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ unsigned char room;
+ int rc;
+
+ if (port->active) {
+ return -EINVAL;
+ }
+ port->active = 1;
+
+ /* find out how much room is in the Tx ring */
+ rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ 6, /* write_room */
+ USB_TYPE_VENDOR | USB_RECIP_INTERFACE
+ | USB_DIR_IN,
+ 0, /* value */
+ 0, /* index */
+ &room,
+ 1,
+ 2*HZ);
+ if (rc < 0) {
+ dbg(" roomquery failed");
+ return rc; /* failed */
+ }
+ if (rc == 0) {
+ dbg(" roomquery returned 0 bytes");
+ return -EIO; /* device didn't return any data */
+ }
+ serial->tx_room = room;
+ serial->tx_throttled = room ? 0 : 1;
+
+ /* the normal serial device seems to always turn on DTR and RTS here,
+ so do the same */
+ if (tty->termios->c_cflag & CBAUD)
+ keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) );
+ else
+ keyspan_pda_set_modem_info(serial, 0);
+
+ /*Start reading from the device*/
+ if (usb_submit_urb(&port->read_urb))
+ dbg(" usb_submit_urb(read int) failed");
+
+ return (0);
+}
+
+
+static void keyspan_pda_serial_close(struct tty_struct *tty,
+ struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ /* the normal serial device seems to always shut off DTR and RTS now */
+ if (tty->termios->c_cflag & HUPCL)
+ keyspan_pda_set_modem_info(serial, 0);
+
+ /* shutdown our bulk reads and writes */
+ usb_unlink_urb (&port->write_urb);
+ usb_unlink_urb (&port->read_urb);
+ port->active = 0;
+}
+
+
+/* download the firmware to a "fake" device (pre-renumeration) */
+static int keyspan_pda_fake_startup (struct usb_serial *serial)
+{
+ int response;
+ const struct ezusb_hex_record *record;
+
+ /* download the firmware here ... */
+ response = ezusb_set_reset(serial, 1);
+
+ record = &keyspan_pda_firmware[0];
+ while(record->address != 0xffff) {
+ response = ezusb_writememory(serial, record->address,
+ (unsigned char *)record->data,
+ record->data_size, 0xa0);
+ if (response < 0) {
+ err("ezusb_writememory failed for Keyspan PDA "
+ "firmware (%d %04X %p %d)",
+ response,
+ record->address, record->data, record->data_size);
+ break;
+ }
+ record++;
+ }
+ /* bring device out of reset. Renumeration will occur in a moment
+ and the new device will bind to the real driver */
+ response = ezusb_set_reset(serial, 0);
+
+ /* we want this device to fail to have a driver assigned to it. */
+ return (1);
+}
+
+
+/* do some startup allocations not currently performed by usb_serial_probe() */
+static int keyspan_pda_startup (struct usb_serial *serial)
+{
+ struct usb_endpoint_descriptor *intin;
+ intin = serial->port[0].interrupt_in_endpoint;
+
+ /* set up the receive interrupt urb */
+ FILL_INT_URB(&serial->port[0].read_urb, serial->dev,
+ usb_rcvintpipe(serial->dev, intin->bEndpointAddress),
+ serial->port[0].interrupt_in_buffer,
+ intin->wMaxPacketSize,
+ keyspan_pda_rx_interrupt,
+ serial,
+ intin->bInterval);
+
+ init_waitqueue_head(&serial->write_wait);
+
+ return (0);
+}
+
+#endif /* CONFIG_USB_SERIAL_KEYSPAN_PDA */
+
+
+/*****************************************************************************
+ * generic devices specific driver functions
+ *****************************************************************************/
+static int generic_serial_open (struct tty_struct *tty, struct file *filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("generic_serial_open port %d", portNumber);
+
+ if (port->active) {
+ dbg ("device already open");
+ return -EINVAL;
+ }
+ port->active = 1;
+
+ /* if we have a bulk interrupt, start reading from it */
+ if (serial->num_bulk_in) {
+ /*Start reading from the device*/
+ if (usb_submit_urb(&port->read_urb))
+ dbg("usb_submit_urb(read bulk) failed");
+ }
+
+ return (0);
+}
+
+
+static void generic_serial_close(struct tty_struct *tty, struct file * filp)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("generic_serial_close port %d", portNumber);
+
+ /* shutdown any bulk reads that might be going on */
+ if (serial->num_bulk_out) {
+ usb_unlink_urb (&port->write_urb);
+ }
+ if (serial->num_bulk_in) {
+ usb_unlink_urb (&port->read_urb);
+ }
+
+ port->active = 0;
+}
+
+
+static int generic_serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
+{
+ struct usb_serial *serial = (struct usb_serial *) tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("generic_serial_write port %d", portNumber);
+
+ if (count == 0) {
+ dbg("write request of 0 bytes");
+ return (0);
+ }
+
+ /* only do something if we have a bulk out endpoint */
+ if (serial->num_bulk_out) {
+ if (port->write_urb.status == -EINPROGRESS) {
+ dbg ("already writing");
+ return (0);
+ }
+
+ count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
+
+ if (from_user) {
+ copy_from_user(port->write_urb.transfer_buffer, buf, count);
+ }
+ else {
+ memcpy (port->write_urb.transfer_buffer, buf, count);
+ }
+
+ /* send the data out the bulk port */
+ port->write_urb.transfer_buffer_length = count;
+
+ if (usb_submit_urb(&port->write_urb))
+ dbg("usb_submit_urb(write bulk) failed");
+
+ return (count);
+ }
+
+ /* no bulk out, so return 0 bytes written */
+ return (0);
+}
+
+
+static int generic_write_room (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+ int room;
+
+ dbg("generic_write_room port %d", portNumber);
+
+ if (serial->num_bulk_out) {
+ if (port->write_urb.status == -EINPROGRESS)
+ room = 0;
+ else
+ room = port->bulk_out_size;
+ dbg("generic_write_room returns %d", room);
+ return (room);
+ }
+
+ return (0);
+}
+
+
+static int generic_chars_in_buffer (struct tty_struct *tty)
+{
+ struct usb_serial *serial = (struct usb_serial *)tty->driver_data;
+ int portNumber = MINOR(tty->device) - serial->minor;
+ struct usb_serial_port *port = &serial->port[portNumber];
+
+ dbg("generic_chars_in_buffer port %d", portNumber);
+
+ if (serial->num_bulk_out) {
+ if (port->write_urb.status == -EINPROGRESS) {
+ return (port->bulk_out_size);
+ }
+ }
+
+ return (0);
+}
+
+
+static void generic_throttle (struct tty_struct *tty)
+{
+ /* do nothing for the generic device */
+ return;
+}
+
+
+static void generic_unthrottle (struct tty_struct *tty)
+{
+ /* do nothing for the generic device */
+ return;
+}
+
+
+static int generic_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
+{
+ /* generic driver doesn't support any ioctls yet */
+ return -ENOIOCTLCMD;
+}
+
+
+static void generic_set_termios (struct tty_struct *tty, struct termios * old)
+{
+ /* generic driver doesn't really care about setting any line settings */
+ return;
+}
+
+
+static void generic_read_bulk_callback (struct urb *urb)
+{
+ struct usb_serial *serial = (struct usb_serial *)urb->context;
+ struct tty_struct *tty = serial->tty;
+ unsigned char *data = urb->transfer_buffer;
+ int i;
+
+ dbg("generic_read_bulk_callback");
+
+ if (urb->status) {
+ dbg("nonzero read bulk status received: %d", urb->status);
+ return;
+ }
+
+#ifdef DEBUG
+ if (urb->actual_length) {
+ printk (KERN_DEBUG __FILE__ ": data read - length = %d, data = ", urb->actual_length);
+ for (i = 0; i < urb->actual_length; ++i) {
+ printk ("%.2x ", data[i]);
+ }
+ printk ("\n");
+ }
+#endif
+
+ if (urb->actual_length) {
+ for (i = 0; i < urb->actual_length ; ++i) {
+ tty_insert_flip_char(tty, data[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ }
+
+ /* Continue trying to always read */
+ if (usb_submit_urb(urb))
+ dbg("failed resubmitting read urb");
+
+ return;
+}
+
+
+static void generic_write_bulk_callback (struct urb *urb)
+{
+ struct usb_serial *serial = (struct usb_serial *) urb->context;
+ struct tty_struct *tty = serial->tty;
+
+ dbg("generic_write_bulk_callback");
+
+ if (urb->status) {
+ dbg("nonzero write bulk status received: %d", urb->status);
+ return;
+ }
+
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+
+ wake_up_interruptible(&tty->write_wait);
+
+ return;
+}
+
+
+
+static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum)
+{
+ struct usb_serial *serial = NULL;
+ struct usb_serial_port *port;
+ struct usb_interface_descriptor *interface;
+ struct usb_endpoint_descriptor *endpoint;
+ struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
+ struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
+ struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
+ struct usb_serial_device_type *type;
+ int device_num;
+ int minor;
+ int buffer_size;
+ int i;
+ char interrupt_pipe;
+ char bulk_in_pipe;
+ char bulk_out_pipe;
+ int num_interrupt_in = 0;
+ int num_bulk_in = 0;
+ int num_bulk_out = 0;
+ int num_ports;
+
+ /* loop through our list of known serial converters, and see if this device matches */
+ device_num = 0;
+ while (usb_serial_devices[device_num] != NULL) {
+ type = usb_serial_devices[device_num];
+ dbg ("Looking at %s Vendor id=%.4x Product id=%.4x", type->name, *(type->idVendor), *(type->idProduct));
+
+ /* look at the device descriptor */
+ if ((dev->descriptor.idVendor == *(type->idVendor)) &&
+ (dev->descriptor.idProduct == *(type->idProduct))) {
+
+ dbg("descriptor matches...looking at the endpoints");
+
+ /* descriptor matches, let's try to find the endpoints needed */
+ interrupt_pipe = bulk_in_pipe = bulk_out_pipe = HAS_NOT;
+
+ /* check out the endpoints */
+ interface = &dev->actconfig->interface[ifnum].altsetting[0];
+ for (i = 0; i < interface->bNumEndpoints; ++i) {
+ endpoint = &interface->endpoint[i];
+
+ if ((endpoint->bEndpointAddress & 0x80) &&
+ ((endpoint->bmAttributes & 3) == 0x02)) {
+ /* we found a bulk in endpoint */
+ dbg("found bulk in");
+ bulk_in_pipe = HAS;
+ bulk_in_endpoint[num_bulk_in] = endpoint;
+ ++num_bulk_in;
+ }
+
+ if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
+ ((endpoint->bmAttributes & 3) == 0x02)) {
+ /* we found a bulk out endpoint */
+ dbg("found bulk out");
+ bulk_out_pipe = HAS;
+ bulk_out_endpoint[num_bulk_out] = endpoint;
+ ++num_bulk_out;
+ }
+
+ if ((endpoint->bEndpointAddress & 0x80) &&
+ ((endpoint->bmAttributes & 3) == 0x03)) {
+ /* we found a interrupt in endpoint */
+ dbg("found interrupt in");
+ interrupt_pipe = HAS;
+ interrupt_in_endpoint[num_interrupt_in] = endpoint;
+ ++num_interrupt_in;
+ }
+
+ }
+
+ /* verify that we found all of the endpoints that we need */
+ if ((interrupt_pipe & type->needs_interrupt_in) &&
+ (bulk_in_pipe & type->needs_bulk_in) &&
+ (bulk_out_pipe & type->needs_bulk_out)) {
+ /* found all that we need */
+ info("%s converter detected", type->name);
+
+#ifdef CONFIG_USB_SERIAL_GENERIC
+ if (type == &generic_device)
+ num_ports = num_bulk_out;
+ else
+#endif
+ num_ports = type->num_ports;
+
+ serial = get_free_serial (num_ports, &minor);
+ if (serial == NULL) {
+ err("No more free serial devices");
+ return NULL;
+ }
+
+ serial->dev = dev;
+ serial->type = type;
+ serial->minor = minor;
+ serial->num_ports = num_ports;
+ serial->num_bulk_in = num_bulk_in;
+ serial->num_bulk_out = num_bulk_out;
+ serial->num_interrupt_in = num_interrupt_in;
+
+ /* collect interrupt_in endpoints now, because
+ the keyspan_pda startup function needs
+ to know about them */
+ for (i = 0; i < num_interrupt_in; ++i) {
+ port = &serial->port[i];
+ buffer_size = interrupt_in_endpoint[i]->wMaxPacketSize;
+ port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+ if (!port->interrupt_in_buffer) {
+ err("Couldn't allocate interrupt_in_buffer");
+ goto probe_error;
+ }
+ port->interrupt_in_endpoint = interrupt_in_endpoint[i];
+ }
+
+ /* if this device type has a startup function, call it */
+ if (type->startup) {
+ if (type->startup (serial)) {
+ return_serial (serial);
+ return NULL;
+ }
+ }
+
+ /* set up the endpoint information */
+ for (i = 0; i < num_bulk_in; ++i) {
+ port = &serial->port[i];
+ buffer_size = bulk_in_endpoint[i]->wMaxPacketSize;
+ port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+ if (!port->bulk_in_buffer) {
+ err("Couldn't allocate bulk_in_buffer");
+ goto probe_error;
+ }
+ if (serial->type->read_bulk_callback) {
+ FILL_BULK_URB(&port->read_urb, dev, usb_rcvbulkpipe (dev, bulk_in_endpoint[i]->bEndpointAddress),
+ port->bulk_in_buffer, buffer_size, serial->type->read_bulk_callback, serial);
+ } else {
+ FILL_BULK_URB(&port->read_urb, dev, usb_rcvbulkpipe (dev, bulk_in_endpoint[i]->bEndpointAddress),
+ port->bulk_in_buffer, buffer_size, generic_read_bulk_callback, serial);
+ }
+ }
+
+ for (i = 0; i < num_bulk_out; ++i) {
+ port = &serial->port[i];
+ port->bulk_out_size = bulk_out_endpoint[i]->wMaxPacketSize;
+ port->bulk_out_buffer = kmalloc (port->bulk_out_size, GFP_KERNEL);
+ if (!port->bulk_out_buffer) {
+ err("Couldn't allocate bulk_out_buffer");
+ goto probe_error;
+ }
+ if (serial->type->write_bulk_callback) {
+ FILL_BULK_URB(&port->write_urb, dev, usb_sndbulkpipe (dev, bulk_out_endpoint[i]->bEndpointAddress),
+ port->bulk_out_buffer, port->bulk_out_size, serial->type->write_bulk_callback, serial);
+ } else {
+ FILL_BULK_URB(&port->write_urb, dev, usb_sndbulkpipe (dev, bulk_out_endpoint[i]->bEndpointAddress),
+ port->bulk_out_buffer, port->bulk_out_size, generic_write_bulk_callback, serial);
+ }
+ }
+
+#if 0 /* use this code when WhiteHEAT is up and running */
+ for (i = 0; i < num_interrupt_in; ++i) {
+ buffer_size = interrupt_in_endpoint[i]->wMaxPacketSize;
+ serial->interrupt_in_buffer[i] = kmalloc (buffer_size, GFP_KERNEL);
+ if (!serial->interrupt_in_buffer[i]) {
+ err("Couldn't allocate interrupt_in_buffer");
+ goto probe_error;
+ }
+ FILL_INT_URB(&serial->control_urb[i], dev, usb_rcvintpipe (dev, interrupt_in_endpoint[i]->bEndpointAddress),
+ serial->interrupt_in_buffer[i], buffer_size, serial_control_irq,
+ serial, interrupt_in_endpoint[i]->bInterval);
+ }
+#endif
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ info("%s converter now attached to ttyUSB%d", type->name, serial->minor + i);
+ }
+
+ MOD_INC_USE_COUNT;
+
+ return serial;
+ } else {
+ info("descriptors matched, but endpoints did not");
+ }
+ }
+
+ /* look at the next type in our list */
+ ++device_num;
+ }
+
+probe_error:
+ if (serial) {
+ for (i = 0; i < num_bulk_in; ++i)
+ if (serial->port[i].bulk_in_buffer[i])
+ kfree (serial->port[i].bulk_in_buffer);
+ for (i = 0; i < num_bulk_out; ++i)
+ if (serial->port[i].bulk_out_buffer)
+ kfree (serial->port[i].bulk_out_buffer);
+ for (i = 0; i < num_interrupt_in; ++i)
+ if (serial->port[i].interrupt_in_buffer)
+ kfree (serial->port[i].interrupt_in_buffer);
+
+ /* return the minor range that this device had */
+ return_serial (serial);
+
+ /* free up any memory that we allocated */
+ kfree (serial);
+ }
+ return NULL;
+}
+
+
+static void usb_serial_disconnect(struct usb_device *dev, void *ptr)
+{
+ struct usb_serial *serial = (struct usb_serial *) ptr;
+ struct usb_serial_port *port;
+ int i;
+
+ if (serial) {
+ /* need to stop any transfers...*/
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = &serial->port[i];
+ usb_unlink_urb (&port->write_urb);
+ usb_unlink_urb (&port->read_urb);
+ port->active = 0;
+ }
+
+ /* free up any memory that we allocated */
+ for (i = 0; i < serial->num_bulk_in; ++i) {
+ port = &serial->port[i];
+ if (port->bulk_in_buffer)
+ kfree (port->bulk_in_buffer);
+ }
+ for (i = 0; i < serial->num_bulk_out; ++i) {
+ port = &serial->port[i];
+ if (port->bulk_out_buffer)
+ kfree (port->bulk_out_buffer);
+ }
+ for (i = 0; i < serial->num_interrupt_in; ++i) {
+ port = &serial->port[i];
+ if (port->interrupt_in_buffer)
+ kfree (port->interrupt_in_buffer);
+ }
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ info("%s converter now disconnected from ttyUSB%d", serial->type->name, serial->minor + i);
+ }
+
+ /* return the minor range that this device had */
+ return_serial (serial);
+
+ /* free up any memory that we allocated */
+ kfree (serial);
+
+ } else {
+ info("device disconnected");
+ }
+
+ MOD_DEC_USE_COUNT;
+}
+
+
+static struct tty_driver serial_tty_driver = {
+ magic: TTY_DRIVER_MAGIC,
+ driver_name: "usb",
+ name: "ttyUSB",
+ major: SERIAL_TTY_MAJOR,
+ minor_start: 0,
+ num: SERIAL_TTY_MINORS,
+ type: TTY_DRIVER_TYPE_SERIAL,
+ subtype: SERIAL_TYPE_NORMAL,
+ flags: TTY_DRIVER_REAL_RAW,
+ refcount: &serial_refcount,
+ table: serial_tty,
+ proc_entry: NULL,
+ other: NULL,
+ termios: serial_termios,
+ termios_locked: serial_termios_locked,
+
+ open: serial_open,
+ close: serial_close,
+ write: serial_write,
+ put_char: NULL,
+ flush_chars: NULL,
+ write_room: serial_write_room,
+ ioctl: serial_ioctl,
+ set_termios: serial_set_termios,
+ set_ldisc: NULL,
+ throttle: serial_throttle,
+ unthrottle: serial_unthrottle,
+ stop: NULL,
+ start: NULL,
+ hangup: NULL,
+ break_ctl: serial_break,
+ wait_until_sent: NULL,
+ send_xchar: NULL,
+ read_proc: NULL,
+ chars_in_buffer: serial_chars_in_buffer,
+ flush_buffer: NULL
+};
+
+
+int usb_serial_init(void)
+{
+ int i;
+
+ /* Initalize our global data */
+ for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
+ serial_table[i] = NULL;
+ }
+
+ /* register the tty driver */
+ serial_tty_driver.init_termios = tty_std_termios;
+ serial_tty_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ if (tty_register_driver (&serial_tty_driver)) {
+ err("failed to register tty driver");
+ return -EPERM;
+ }
+
+ /* register the USB driver */
+ if (usb_register(&usb_serial_driver) < 0) {
+ tty_unregister_driver(&serial_tty_driver);
+ return -1;
+ }
+
+ info("support registered");
+ return 0;
+}
+
+
+void usb_serial_exit(void)
+{
+ tty_unregister_driver(&serial_tty_driver);
+ usb_deregister(&usb_serial_driver);
+}
+
+
+module_init(usb_serial_init);
+module_exit(usb_serial_exit);
+
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)