whiteheat.c
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上传日期:2013-02-24
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文件大小:20k
- /*
- * USB ConnectTech WhiteHEAT driver
- *
- * Copyright (C) 1999 - 2001
- * 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.
- *
- * See Documentation/usb/usb-serial.txt for more information on using this driver
- *
- * (05/30/2001) gkh
- * switched from using spinlock to a semaphore, which fixes lots of problems.
- *
- * (04/08/2001) gb
- * Identify version on module load.
- *
- * 2001_Mar_19 gkh
- * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
- * than once, and the got the proper usb_device_id table entries so
- * the driver works again.
- *
- * (11/01/2000) Adam J. Richter
- * usb_device_id table support
- *
- * (10/05/2000) gkh
- * Fixed bug with urb->dev not being set properly, now that the usb
- * core needs it.
- *
- * (10/03/2000) smd
- * firmware is improved to guard against crap sent to device
- * firmware now replies CMD_FAILURE on bad things
- * read_callback fix you provided for private info struct
- * command_finished now indicates success or fail
- * setup_port struct now packed to avoid gcc padding
- * firmware uses 1 based port numbering, driver now handles that
- *
- * (09/11/2000) gkh
- * Removed DEBUG #ifdefs with call to usb_serial_debug_data
- *
- * (07/19/2000) gkh
- * Added module_init and module_exit functions to handle the fact that this
- * driver is a loadable module now.
- * Fixed bug with port->minor that was found by Al Borchers
- *
- * (07/04/2000) gkh
- * Added support for port settings. Baud rate can now be changed. Line signals
- * are not transferred to and from the tty layer yet, but things seem to be
- * working well now.
- *
- * (05/04/2000) gkh
- * First cut at open and close commands. Data can flow through the ports at
- * default speeds now.
- *
- * (03/26/2000) gkh
- * Split driver up into device specific pieces.
- *
- */
- #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 "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
- #include "whiteheat.h" /* WhiteHEAT specific commands */
- /*
- * Version Information
- */
- #define DRIVER_VERSION "v1.1"
- #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
- #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
- #define CONNECT_TECH_VENDOR_ID 0x0710
- #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
- #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
- /*
- ID tables for whiteheat are unusual, because we want to different
- things for different versions of the device. Eventually, this
- will be doable from a single table. But, for now, we define two
- separate ID tables, and then a third table that combines them
- just for the purpose of exporting the autoloading information.
- */
- static __devinitdata struct usb_device_id id_table_std [] = {
- { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id id_table_prerenumeration [] = {
- { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
- { } /* Terminating entry */
- };
- static __devinitdata struct usb_device_id id_table_combined [] = {
- { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
- { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE (usb, id_table_combined);
- /* function prototypes for the Connect Tech WhiteHEAT serial converter */
- static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
- static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
- static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
- static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old);
- static void whiteheat_throttle (struct usb_serial_port *port);
- static void whiteheat_unthrottle (struct usb_serial_port *port);
- static int whiteheat_startup (struct usb_serial *serial);
- static void whiteheat_shutdown (struct usb_serial *serial);
- static struct usb_serial_device_type whiteheat_fake_device = {
- name: "Connect Tech - WhiteHEAT - (prerenumeration)",
- id_table: id_table_prerenumeration,
- needs_interrupt_in: DONT_CARE, /* don't have to have an interrupt in endpoint */
- needs_bulk_in: DONT_CARE, /* don't have to have a bulk in endpoint */
- needs_bulk_out: DONT_CARE, /* don't have to have a bulk out endpoint */
- num_interrupt_in: NUM_DONT_CARE,
- num_bulk_in: NUM_DONT_CARE,
- num_bulk_out: NUM_DONT_CARE,
- num_ports: 1,
- startup: whiteheat_startup
- };
- static struct usb_serial_device_type whiteheat_device = {
- name: "Connect Tech - WhiteHEAT",
- id_table: id_table_std,
- needs_interrupt_in: DONT_CARE, /* don't have to have an interrupt in endpoint */
- needs_bulk_in: DONT_CARE, /* don't have to have a bulk in endpoint */
- needs_bulk_out: DONT_CARE, /* don't have to have a bulk out endpoint */
- num_interrupt_in: NUM_DONT_CARE,
- num_bulk_in: NUM_DONT_CARE,
- num_bulk_out: NUM_DONT_CARE,
- num_ports: 4,
- open: whiteheat_open,
- close: whiteheat_close,
- throttle: whiteheat_throttle,
- unthrottle: whiteheat_unthrottle,
- ioctl: whiteheat_ioctl,
- set_termios: whiteheat_set_termios,
- shutdown: whiteheat_shutdown,
- };
- struct whiteheat_private {
- __u8 command_finished;
- wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
- };
- /* local function prototypes */
- static inline void set_rts (struct usb_serial_port *port, unsigned char rts);
- static inline void set_dtr (struct usb_serial_port *port, unsigned char dtr);
- static inline void set_break (struct usb_serial_port *port, unsigned char brk);
- #define COMMAND_PORT 4
- #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
- /*****************************************************************************
- * Connect Tech's White Heat specific driver functions
- *****************************************************************************/
- static void command_port_write_callback (struct urb *urb)
- {
- dbg (__FUNCTION__);
- if (urb->status) {
- dbg ("nonzero urb status: %d", urb->status);
- return;
- }
- usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
- return;
- }
- static void command_port_read_callback (struct urb *urb)
- {
- struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
- struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
- struct whiteheat_private *info;
- unsigned char *data = urb->transfer_buffer;
- int result;
- dbg (__FUNCTION__);
- if (urb->status) {
- dbg (__FUNCTION__ " - nonzero urb status: %d", urb->status);
- return;
- }
- if (!serial) {
- dbg(__FUNCTION__ " - bad serial pointer, exiting");
- return;
- }
-
- usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
- info = (struct whiteheat_private *)port->private;
- if (!info) {
- dbg (__FUNCTION__ " - info is NULL, exiting.");
- return;
- }
- /* right now, if the command is COMMAND_COMPLETE, just flip the bit saying the command finished */
- /* in the future we're going to have to pay attention to the actual command that completed */
- if (data[0] == WHITEHEAT_CMD_COMPLETE) {
- info->command_finished = WHITEHEAT_CMD_COMPLETE;
- wake_up_interruptible(&info->wait_command);
- }
-
- if (data[0] == WHITEHEAT_CMD_FAILURE) {
- info->command_finished = WHITEHEAT_CMD_FAILURE;
- wake_up_interruptible(&info->wait_command);
- }
-
- /* 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,
- command_port_read_callback, port);
- result = usb_submit_urb(port->read_urb);
- if (result)
- dbg(__FUNCTION__ " - failed resubmitting read urb, error %d", result);
- }
- static int whiteheat_send_cmd (struct usb_serial *serial, __u8 command, __u8 *data, __u8 datasize)
- {
- struct whiteheat_private *info;
- struct usb_serial_port *port;
- int timeout;
- __u8 *transfer_buffer;
- int retval = 0;
- dbg(__FUNCTION__" - command %d", command);
- port = &serial->port[COMMAND_PORT];
- info = (struct whiteheat_private *)port->private;
- info->command_finished = FALSE;
-
- transfer_buffer = (__u8 *)port->write_urb->transfer_buffer;
- transfer_buffer[0] = command;
- memcpy (&transfer_buffer[1], data, datasize);
- port->write_urb->transfer_buffer_length = datasize + 1;
- port->write_urb->dev = serial->dev;
- retval = usb_submit_urb (port->write_urb);
- if (retval) {
- dbg (__FUNCTION__" - submit urb failed");
- goto exit;
- }
- /* wait for the command to complete */
- timeout = COMMAND_TIMEOUT;
- while (timeout && (info->command_finished == FALSE)) {
- timeout = interruptible_sleep_on_timeout (&info->wait_command, timeout);
- }
- if (info->command_finished == FALSE) {
- dbg (__FUNCTION__ " - command timed out.");
- retval = -ETIMEDOUT;
- goto exit;
- }
- if (info->command_finished == WHITEHEAT_CMD_FAILURE) {
- dbg (__FUNCTION__ " - command failed.");
- retval = -EIO;
- goto exit;
- }
- if (info->command_finished == WHITEHEAT_CMD_COMPLETE)
- dbg (__FUNCTION__ " - command completed.");
- exit:
- return retval;
- }
- static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
- {
- struct whiteheat_min_set open_command;
- struct usb_serial_port *command_port;
- struct whiteheat_private *info;
- int retval = 0;
- dbg(__FUNCTION__" - port %d", port->number);
- down (&port->sem);
- ++port->open_count;
- MOD_INC_USE_COUNT;
-
- if (!port->active) {
- port->active = 1;
- /* set up some stuff for our command port */
- command_port = &port->serial->port[COMMAND_PORT];
- if (command_port->private == NULL) {
- info = (struct whiteheat_private *)kmalloc (sizeof(struct whiteheat_private), GFP_KERNEL);
- if (info == NULL) {
- err(__FUNCTION__ " - out of memory");
- retval = -ENOMEM;
- goto error_exit;
- }
-
- init_waitqueue_head(&info->wait_command);
- command_port->private = info;
- command_port->write_urb->complete = command_port_write_callback;
- command_port->read_urb->complete = command_port_read_callback;
- command_port->read_urb->dev = port->serial->dev;
- command_port->tty = port->tty; /* need this to "fake" our our sanity check macros */
- retval = usb_submit_urb (command_port->read_urb);
- if (retval) {
- err(__FUNCTION__ " - failed submitting read urb, error %d", retval);
- goto error_exit;
- }
- }
-
- /* Start reading from the device */
- port->read_urb->dev = port->serial->dev;
- retval = usb_submit_urb(port->read_urb);
- if (retval) {
- err(__FUNCTION__ " - failed submitting read urb, error %d", retval);
- goto error_exit;
- }
-
- /* send an open port command */
- /* firmware uses 1 based port numbering */
- open_command.port = port->number - port->serial->minor + 1;
- retval = whiteheat_send_cmd (port->serial, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
- if (retval)
- goto error_exit;
-
- /* Need to do device specific setup here (control lines, baud rate, etc.) */
- /* FIXME!!! */
- }
- dbg(__FUNCTION__ " - exit");
- up (&port->sem);
-
- return retval;
- error_exit:
- --port->open_count;
- MOD_DEC_USE_COUNT;
- dbg(__FUNCTION__ " - error_exit");
- up (&port->sem);
-
- return retval;
- }
- static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
- {
- struct whiteheat_min_set close_command;
-
- dbg(__FUNCTION__ " - port %d", port->number);
-
- down (&port->sem);
- --port->open_count;
- if (port->open_count <= 0) {
- /* send a close command to the port */
- /* firmware uses 1 based port numbering */
- close_command.port = port->number - port->serial->minor + 1;
- whiteheat_send_cmd (port->serial, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
-
- /* 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;
- }
- MOD_DEC_USE_COUNT;
- up (&port->sem);
- }
- static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
- {
- dbg(__FUNCTION__ " - port %d, cmd 0x%.4x", port->number, cmd);
- return -ENOIOCTLCMD;
- }
- static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
- {
- unsigned int cflag;
- struct whiteheat_port_settings port_settings;
- dbg(__FUNCTION__ " -port %d", port->number);
- down (&port->sem);
- if ((!port->tty) || (!port->tty->termios)) {
- dbg(__FUNCTION__" - no tty structures");
- goto exit;
- }
-
- cflag = port->tty->termios->c_cflag;
- /* check that they really want us to change something */
- if (old_termios) {
- if ((cflag == old_termios->c_cflag) &&
- (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
- dbg(__FUNCTION__ " - nothing to change...");
- goto exit;
- }
- }
- /* set the port number */
- /* firmware uses 1 based port numbering */
- port_settings.port = port->number + 1;
- /* get the byte size */
- switch (cflag & CSIZE) {
- case CS5: port_settings.bits = 5; break;
- case CS6: port_settings.bits = 6; break;
- case CS7: port_settings.bits = 7; break;
- default:
- case CS8: port_settings.bits = 8; break;
- }
- dbg(__FUNCTION__ " - data bits = %d", port_settings.bits);
-
- /* determine the parity */
- if (cflag & PARENB)
- if (cflag & PARODD)
- port_settings.parity = 'o';
- else
- port_settings.parity = 'e';
- else
- port_settings.parity = 'n';
- dbg(__FUNCTION__ " - parity = %c", port_settings.parity);
- /* figure out the stop bits requested */
- if (cflag & CSTOPB)
- port_settings.stop = 2;
- else
- port_settings.stop = 1;
- dbg(__FUNCTION__ " - stop bits = %d", port_settings.stop);
-
- /* figure out the flow control settings */
- if (cflag & CRTSCTS)
- port_settings.hflow = (WHITEHEAT_CTS_FLOW | WHITEHEAT_RTS_FLOW);
- else
- port_settings.hflow = 0;
- dbg(__FUNCTION__ " - hardware flow control = %s %s %s %s",
- (port_settings.hflow & WHITEHEAT_CTS_FLOW) ? "CTS" : "",
- (port_settings.hflow & WHITEHEAT_RTS_FLOW) ? "RTS" : "",
- (port_settings.hflow & WHITEHEAT_DSR_FLOW) ? "DSR" : "",
- (port_settings.hflow & WHITEHEAT_DTR_FLOW) ? "DTR" : "");
-
- /* determine software flow control */
- if (I_IXOFF(port->tty))
- port_settings.sflow = 'b';
- else
- port_settings.sflow = 'n';
- dbg(__FUNCTION__ " - software flow control = %c", port_settings.sflow);
-
- port_settings.xon = START_CHAR(port->tty);
- port_settings.xoff = STOP_CHAR(port->tty);
- dbg(__FUNCTION__ " - XON = %2x, XOFF = %2x", port_settings.xon, port_settings.xoff);
- /* get the baud rate wanted */
- port_settings.baud = tty_get_baud_rate(port->tty);
- dbg(__FUNCTION__ " - baud rate = %d", port_settings.baud);
- /* handle any settings that aren't specified in the tty structure */
- port_settings.lloop = 0;
-
- /* now send the message to the device */
- whiteheat_send_cmd (port->serial, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
-
- exit:
- up (&port->sem);
- return;
- }
- static void whiteheat_throttle (struct usb_serial_port *port)
- {
- dbg(__FUNCTION__" - port %d", port->number);
- /* Change the control signals */
- /* FIXME!!! */
- return;
- }
- static void whiteheat_unthrottle (struct usb_serial_port *port)
- {
- dbg(__FUNCTION__" - port %d", port->number);
- /* 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(__FUNCTION__);
-
- 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(__FUNCTION__ " - 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, 0xa3);
- if (response < 0) {
- err(__FUNCTION__ " - 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(__FUNCTION__" - 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;
- }
- static void whiteheat_shutdown (struct usb_serial *serial)
- {
- struct usb_serial_port *command_port;
- int i;
- dbg(__FUNCTION__);
- /* stop reads and writes on all ports */
- for (i=0; i < serial->num_ports; ++i) {
- while (serial->port[i].open_count > 0) {
- whiteheat_close (&serial->port[i], NULL);
- }
- }
- /* free up our private data for our command port */
- command_port = &serial->port[COMMAND_PORT];
- if (command_port->private != NULL) {
- kfree (command_port->private);
- command_port->private = NULL;
- }
- return;
- }
- static void set_command (struct usb_serial_port *port, unsigned char state, unsigned char command)
- {
- struct whiteheat_rdb_set rdb_command;
-
- /* send a set rts command to the port */
- /* firmware uses 1 based port numbering */
- rdb_command.port = port->number - port->serial->minor + 1;
- rdb_command.state = state;
- whiteheat_send_cmd (port->serial, command, (__u8 *)&rdb_command, sizeof(rdb_command));
- }
- static inline void set_rts (struct usb_serial_port *port, unsigned char rts)
- {
- set_command (port, rts, WHITEHEAT_SET_RTS);
- }
- static inline void set_dtr (struct usb_serial_port *port, unsigned char dtr)
- {
- set_command (port, dtr, WHITEHEAT_SET_DTR);
- }
- static inline void set_break (struct usb_serial_port *port, unsigned char brk)
- {
- set_command (port, brk, WHITEHEAT_SET_BREAK);
- }
- static int __init whiteheat_init (void)
- {
- usb_serial_register (&whiteheat_fake_device);
- usb_serial_register (&whiteheat_device);
- info(DRIVER_VERSION ":" DRIVER_DESC);
- return 0;
- }
- static void __exit whiteheat_exit (void)
- {
- usb_serial_deregister (&whiteheat_fake_device);
- usb_serial_deregister (&whiteheat_device);
- }
- module_init(whiteheat_init);
- module_exit(whiteheat_exit);
- MODULE_AUTHOR( DRIVER_AUTHOR );
- MODULE_DESCRIPTION( DRIVER_DESC );
- MODULE_LICENSE("GPL");
- MODULE_PARM(debug, "i");
- MODULE_PARM_DESC(debug, "Debug enabled or not");