--- /dev/null
+/*
+ Option Card (PCMCIA to) USB to Serial Driver
+
+ Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
+
+ This driver is free software; you can redistribute it and/or modify
+ it under the terms of Version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+
+ Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
+
+ History:
+
+ 2005-05-19 v0.1 Initial version, based on incomplete docs
+ and analysis of misbehavior of the standard driver
+ 2005-05-20 v0.2 Extended the input buffer to avoid losing
+ random 64-byte chunks of data
+ 2005-05-21 v0.3 implemented chars_in_buffer()
+ turned on low_latency
+ simplified the code somewhat
+*/
+#define DRIVER_VERSION "v0.3"
+#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
+#define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include "usb-serial.h"
+
+/* Function prototypes */
+static int option_open (struct usb_serial_port *port, struct file *filp);
+static void option_close (struct usb_serial_port *port, struct file *filp);
+static int option_startup (struct usb_serial *serial);
+static void option_shutdown (struct usb_serial *serial);
+static void option_rx_throttle (struct usb_serial_port *port);
+static void option_rx_unthrottle (struct usb_serial_port *port);
+static int option_write_room (struct usb_serial_port *port);
+
+static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
+
+
+static int option_write (struct usb_serial_port *port,
+ const unsigned char *buf, int count);
+
+static int option_chars_in_buffer (struct usb_serial_port *port);
+static int option_ioctl (struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg);
+static void option_set_termios (struct usb_serial_port *port,
+ struct termios *old);
+static void option_break_ctl (struct usb_serial_port *port, int break_state);
+static int option_tiocmget (struct usb_serial_port *port, struct file *file);
+static int option_tiocmset (struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear);
+static int option_send_setup (struct usb_serial_port *port);
+
+/* Vendor and product IDs */
+#define OPTION_VENDOR_ID 0x0AF0
+
+#define OPTION_PRODUCT_OLD 0x5000
+#define OPTION_PRODUCT_WLAN 0x6000
+
+static struct usb_device_id option_ids[] = {
+ { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
+ { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_WLAN) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, option_ids);
+
+static struct usb_driver option_driver = {
+ .owner = THIS_MODULE,
+ .name = "option",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = option_ids,
+};
+
+/* The card has three separate interfaces, wich the serial driver
+ * recognizes separately, thus num_port=1.
+ */
+static struct usb_serial_device_type option_3port_device = {
+ .owner = THIS_MODULE,
+ .name = "Option 3-port card",
+ .short_name = "option",
+ .id_table = option_ids,
+ .num_interrupt_in = NUM_DONT_CARE,
+ .num_bulk_in = NUM_DONT_CARE,
+ .num_bulk_out = NUM_DONT_CARE,
+ .num_ports = 1, /* 3 */
+ .open = option_open,
+ .close = option_close,
+ .write = option_write,
+ .write_room = option_write_room,
+ .chars_in_buffer = option_chars_in_buffer,
+ .throttle = option_rx_throttle,
+ .unthrottle = option_rx_unthrottle,
+ .ioctl = option_ioctl,
+ .set_termios = option_set_termios,
+ .break_ctl = option_break_ctl,
+ .tiocmget = option_tiocmget,
+ .tiocmset = option_tiocmset,
+ .attach = option_startup,
+ .shutdown = option_shutdown,
+ .read_int_callback = option_instat_callback,
+};
+
+static int debug;
+
+/* per port private data */
+
+#define N_IN_URB 4
+#define N_OUT_URB 1
+#define IN_BUFLEN 1024
+#define OUT_BUFLEN 1024
+
+struct option_port_private {
+ /* Input endpoints and buffer for this port */
+ struct urb *in_urbs[N_IN_URB];
+ char in_buffer[N_IN_URB][IN_BUFLEN];
+ /* Output endpoints and buffer for this port */
+ struct urb *out_urbs[N_OUT_URB];
+ char out_buffer[N_OUT_URB][OUT_BUFLEN];
+
+ /* Settings for the port */
+ int rts_state; /* Handshaking pins (outputs) */
+ int dtr_state;
+ int cts_state; /* Handshaking pins (inputs) */
+ int dsr_state;
+ int dcd_state;
+ int ri_state;
+ // int break_on;
+
+ unsigned long tx_start_time[N_OUT_URB];
+};
+
+
+/* Functions used by new usb-serial code. */
+static int __init
+option_init (void)
+{
+ int retval;
+ retval = usb_serial_register(&option_3port_device);
+ if (retval)
+ goto failed_3port_device_register;
+ retval = usb_register(&option_driver);
+ if (retval)
+ goto failed_driver_register;
+
+ info(DRIVER_DESC ": " DRIVER_VERSION);
+
+ return 0;
+
+failed_driver_register:
+ usb_serial_deregister (&option_3port_device);
+failed_3port_device_register:
+ return retval;
+}
+
+static void __exit
+option_exit (void)
+{
+ usb_deregister (&option_driver);
+ usb_serial_deregister (&option_3port_device);
+}
+
+module_init(option_init);
+module_exit(option_exit);
+
+static void
+option_rx_throttle (struct usb_serial_port *port)
+{
+ dbg("%s", __FUNCTION__);
+}
+
+
+static void
+option_rx_unthrottle (struct usb_serial_port *port)
+{
+ dbg("%s", __FUNCTION__);
+}
+
+
+static void
+option_break_ctl (struct usb_serial_port *port, int break_state)
+{
+ /* Unfortunately, I don't know how to send a break */
+ dbg("%s", __FUNCTION__);
+}
+
+
+static void
+option_set_termios (struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ dbg("%s", __FUNCTION__);
+
+ option_send_setup(port);
+}
+
+static int
+option_tiocmget(struct usb_serial_port *port, struct file *file)
+{
+ unsigned int value;
+ struct option_port_private *portdata;
+
+ portdata = usb_get_serial_port_data(port);
+
+ value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
+ ((portdata->dtr_state) ? TIOCM_DTR : 0) |
+ ((portdata->cts_state) ? TIOCM_CTS : 0) |
+ ((portdata->dsr_state) ? TIOCM_DSR : 0) |
+ ((portdata->dcd_state) ? TIOCM_CAR : 0) |
+ ((portdata->ri_state) ? TIOCM_RNG : 0);
+
+ return value;
+}
+
+static int
+option_tiocmset (struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct option_port_private *portdata;
+
+ portdata = usb_get_serial_port_data(port);
+
+ if (set & TIOCM_RTS)
+ portdata->rts_state = 1;
+ if (set & TIOCM_DTR)
+ portdata->dtr_state = 1;
+
+ if (clear & TIOCM_RTS)
+ portdata->rts_state = 0;
+ if (clear & TIOCM_DTR)
+ portdata->dtr_state = 0;
+ return option_send_setup(port);
+}
+
+static int
+option_ioctl (struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+
+/* Write */
+static int
+option_write(struct usb_serial_port *port,
+ const unsigned char *buf, int count)
+{
+ struct option_port_private *portdata;
+ int i;
+ int left, todo;
+ struct urb *this_urb = NULL; /* spurious */
+ int err;
+
+ portdata = usb_get_serial_port_data(port);
+
+ dbg("%s: write (%d chars)", __FUNCTION__, count);
+
+#if 0
+ spin_lock(&port->lock);
+ if (port->write_urb_busy) {
+ spin_unlock(&port->lock);
+ dbg("%s: already writing", __FUNCTION__);
+ return 0;
+ }
+ port->write_urb_busy = 1;
+ spin_unlock(&port->lock);
+#endif
+
+ i = 0;
+ left = count;
+ while (left>0) {
+ todo = left;
+ if (todo > OUT_BUFLEN)
+ todo = OUT_BUFLEN;
+
+ for (;i < N_OUT_URB; i++) {
+ /* Check we have a valid urb/endpoint before we use it... */
+ this_urb = portdata->out_urbs[i];
+ if (this_urb->status != -EINPROGRESS)
+ break;
+ if (this_urb->transfer_flags & URB_ASYNC_UNLINK)
+ continue;
+ if (time_before(jiffies, portdata->tx_start_time[i] + 10 * HZ))
+ continue;
+ this_urb->transfer_flags |= URB_ASYNC_UNLINK;
+ usb_unlink_urb(this_urb);
+ }
+
+ if (i == N_OUT_URB) {
+ /* no bulk out free! */
+ dbg("%s: no output urb -- left %d", __FUNCTION__,count-left);
+#if 0
+ port->write_urb_busy = 0;
+#endif
+ return count-left;
+ }
+
+ dbg("%s: endpoint %d buf %d", __FUNCTION__, usb_pipeendpoint(this_urb->pipe), i);
+
+ memcpy (this_urb->transfer_buffer, buf, todo);
+
+ /* send the data out the bulk port */
+ this_urb->transfer_buffer_length = todo;
+
+ this_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
+ this_urb->dev = port->serial->dev;
+ err = usb_submit_urb(this_urb, GFP_ATOMIC);
+ if (err) {
+ dbg("usb_submit_urb %p (write bulk) failed (%d,, has %d)", this_urb, err, this_urb->status);
+ continue;
+ }
+ portdata->tx_start_time[i] = jiffies;
+ buf += todo;
+ left -= todo;
+ }
+
+ count -= left;
+#if 0
+ port->write_urb_busy = 0;
+#endif
+ dbg("%s: wrote (did %d)", __FUNCTION__, count);
+ return count;
+}
+
+static void
+option_indat_callback (struct urb *urb, struct pt_regs *regs)
+{
+ int i, err;
+ int endpoint;
+ struct usb_serial_port *port;
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+
+ dbg("%s: %p", __FUNCTION__, urb);
+
+ endpoint = usb_pipeendpoint(urb->pipe);
+ port = (struct usb_serial_port *) urb->context;
+
+ if (urb->status) {
+ dbg("%s: nonzero status: %d on endpoint %02x.",
+ __FUNCTION__, urb->status, endpoint);
+ } else {
+ tty = port->tty;
+ if (urb->actual_length) {
+ for (i = 0; i < urb->actual_length ; ++i) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+ tty_flip_buffer_push(tty);
+ tty_insert_flip_char(tty, data[i], 0);
+ }
+ tty_flip_buffer_push(tty);
+ } else {
+ dbg("%s: empty read urb received", __FUNCTION__);
+ }
+
+ /* Resubmit urb so we continue receiving */
+ if (port->open_count && urb->status != -ESHUTDOWN) {
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err)
+ printk(KERN_ERR "%s: resubmit read urb failed. (%d)", __FUNCTION__, err);
+ }
+ }
+ return;
+}
+
+static void
+option_outdat_callback (struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_serial_port *port;
+
+ dbg("%s", __FUNCTION__);
+
+ port = (struct usb_serial_port *) urb->context;
+
+ if (port->open_count)
+ schedule_work(&port->work);
+}
+
+static void
+option_instat_callback (struct urb *urb, struct pt_regs *regs)
+{
+ int err;
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct option_port_private *portdata = usb_get_serial_port_data(port);
+ struct usb_serial *serial = port->serial;
+
+ dbg("%s", __FUNCTION__);
+ dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
+
+ if (urb->status == 0) {
+ struct usb_ctrlrequest *req_pkt =
+ (struct usb_ctrlrequest *)urb->transfer_buffer;
+
+ if (!req_pkt) {
+ dbg("%s: NULL req_pkt\n", __FUNCTION__);
+ return;
+ }
+ if ((req_pkt->bRequestType == 0xA1) && (req_pkt->bRequest == 0x20)) {
+ int old_dcd_state;
+ unsigned char signals = *((unsigned char *)
+ urb->transfer_buffer + sizeof(struct usb_ctrlrequest));
+
+ dbg("%s: signal x%x", __FUNCTION__, signals);
+
+ old_dcd_state = portdata->dcd_state;
+ portdata->cts_state = 1;
+ portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
+ portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
+ portdata->ri_state = ((signals & 0x08) ? 1 : 0);
+
+ if (port->tty && !C_CLOCAL(port->tty)
+ && old_dcd_state && !portdata->dcd_state) {
+ tty_hangup(port->tty);
+ }
+ } else
+ dbg("%s: type %x req %x", __FUNCTION__, req_pkt->bRequestType,req_pkt->bRequest);
+ } else
+ dbg("%s: error %d", __FUNCTION__, urb->status);
+
+ /* Resubmit urb so we continue receiving IRQ data */
+ if (urb->status != -ESHUTDOWN) {
+ urb->dev = serial->dev;
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err)
+ dbg("%s: resubmit intr urb failed. (%d)", __FUNCTION__, err);
+ }
+}
+
+
+static int
+option_write_room (struct usb_serial_port *port)
+{
+ struct option_port_private *portdata;
+ int i;
+ int data_len = 0;
+ struct urb *this_urb;
+
+ portdata = usb_get_serial_port_data(port);
+
+ for (i=0; i < N_OUT_URB; i++)
+ this_urb = portdata->out_urbs[i];
+ if (this_urb && this_urb->status != -EINPROGRESS)
+ data_len += OUT_BUFLEN;
+
+ dbg("%s: %d", __FUNCTION__, data_len);
+ return data_len;
+}
+
+
+static int
+option_chars_in_buffer (struct usb_serial_port *port)
+{
+ struct option_port_private *portdata;
+ int i;
+ int data_len = 0;
+ struct urb *this_urb;
+
+ portdata = usb_get_serial_port_data(port);
+
+ for (i=0; i < N_OUT_URB; i++)
+ this_urb = portdata->out_urbs[i];
+ if (this_urb && this_urb->status == -EINPROGRESS)
+ data_len += this_urb->transfer_buffer_length;
+
+ dbg("%s: %d", __FUNCTION__, data_len);
+ return data_len;
+}
+
+
+static int
+option_open (struct usb_serial_port *port, struct file *filp)
+{
+ struct option_port_private *portdata;
+ struct usb_serial *serial = port->serial;
+ int i, err;
+ struct urb *urb;
+
+ portdata = usb_get_serial_port_data(port);
+
+ dbg("%s", __FUNCTION__);
+
+ /* Set some sane defaults */
+ portdata->rts_state = 1;
+ portdata->dtr_state = 1;
+
+ /* Reset low level data toggle and start reading from endpoints */
+ for (i = 0; i < N_IN_URB; i++) {
+ urb = portdata->in_urbs[i];
+ if (! urb)
+ continue;
+ if (urb->dev != serial->dev) {
+ dbg("%s: dev %p != %p", __FUNCTION__, urb->dev, serial->dev);
+ continue;
+ }
+
+ /* make sure endpoint data toggle is synchronized with the device */
+
+ usb_clear_halt(urb->dev, urb->pipe);
+
+ err = usb_submit_urb(urb, GFP_KERNEL);
+ if (err) {
+ dbg("%s: submit urb %d failed (%d) %d", __FUNCTION__, i, err,
+ urb->transfer_buffer_length);
+ }
+ }
+
+ /* Reset low level data toggle on out endpoints */
+ for (i = 0; i < N_OUT_URB; i++) {
+ urb = portdata->out_urbs[i];
+ if (! urb)
+ continue;
+ urb->dev = serial->dev;
+ /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe), 0); */
+ }
+
+ port->tty->low_latency = 1;
+
+ option_send_setup(port);
+
+ return (0);
+}
+
+static inline void
+stop_urb(struct urb *urb)
+{
+ if (urb && urb->status == -EINPROGRESS) {
+ urb->transfer_flags &= ~URB_ASYNC_UNLINK;
+ usb_kill_urb(urb);
+ }
+}
+
+static void
+option_close(struct usb_serial_port *port, struct file *filp)
+{
+ int i;
+ struct usb_serial *serial = port->serial;
+ struct option_port_private *portdata;
+
+ dbg("%s", __FUNCTION__);
+ portdata = usb_get_serial_port_data(port);
+
+ portdata->rts_state = 0;
+ portdata->dtr_state = 0;
+
+ if (serial->dev) {
+ option_send_setup(port);
+
+ /* Stop reading/writing urbs */
+ for (i = 0; i < N_IN_URB; i++)
+ stop_urb(portdata->in_urbs[i]);
+ for (i = 0; i < N_OUT_URB; i++)
+ stop_urb(portdata->out_urbs[i]);
+ }
+ port->tty = NULL;
+}
+
+
+/* Helper functions used by option_setup_urbs */
+static struct urb *
+option_setup_urb (struct usb_serial *serial, int endpoint,
+ int dir, void *ctx, char *buf, int len,
+ void (*callback)(struct urb *, struct pt_regs *regs))
+{
+ struct urb *urb;
+
+ if (endpoint == -1)
+ return NULL; /* endpoint not needed */
+
+ urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
+ if (urb == NULL) {
+ dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
+ return NULL;
+ }
+
+ /* Fill URB using supplied data. */
+ usb_fill_bulk_urb(urb, serial->dev,
+ usb_sndbulkpipe(serial->dev, endpoint) | dir,
+ buf, len, callback, ctx);
+
+ return urb;
+}
+
+/* Setup urbs */
+static void
+option_setup_urbs(struct usb_serial *serial)
+{
+ int j;
+ struct usb_serial_port *port;
+ struct option_port_private *portdata;
+
+ dbg("%s", __FUNCTION__);
+
+ port = serial->port[0];
+ portdata = usb_get_serial_port_data(port);
+
+ /* Do indat endpoints first */
+ for (j = 0; j <= N_IN_URB; ++j) {
+ portdata->in_urbs[j] = option_setup_urb (serial,
+ port->bulk_in_endpointAddress, USB_DIR_IN, port,
+ portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
+ }
+
+ /* outdat endpoints */
+ for (j = 0; j <= N_OUT_URB; ++j) {
+ portdata->out_urbs[j] = option_setup_urb (serial,
+ port->bulk_out_endpointAddress, USB_DIR_OUT, port,
+ portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
+ }
+}
+
+
+static int
+option_send_setup(struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+ struct option_port_private *portdata;
+
+ dbg("%s", __FUNCTION__);
+
+ portdata = usb_get_serial_port_data(port);
+
+ if (port->tty) {
+ int val = 0;
+ if (portdata->dtr_state)
+ val |= 0x01;
+ if (portdata->rts_state)
+ val |= 0x02;
+
+ return usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
+ }
+
+ return 0;
+}
+
+
+static int
+option_startup (struct usb_serial *serial)
+{
+ int i, err;
+ struct usb_serial_port *port;
+ struct option_port_private *portdata;
+
+ dbg("%s", __FUNCTION__);
+
+ /* Now setup per port private data */
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ portdata = kmalloc(sizeof(struct option_port_private), GFP_KERNEL);
+ if (!portdata) {
+ dbg("%s: kmalloc for option_port_private (%d) failed!.", __FUNCTION__, i);
+ return (1);
+ }
+ memset(portdata, 0, sizeof(struct option_port_private));
+
+ usb_set_serial_port_data(port, portdata);
+
+ if (! port->interrupt_in_urb)
+ continue;
+ err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
+ if (err)
+ dbg("%s: submit irq_in urb failed %d", __FUNCTION__, err);
+ }
+
+ option_setup_urbs(serial);
+
+ return (0);
+}
+
+static void
+option_shutdown (struct usb_serial *serial)
+{
+ int i, j;
+ struct usb_serial_port *port;
+ struct option_port_private *portdata;
+
+ dbg("%s", __FUNCTION__);
+
+ /* Stop reading/writing urbs */
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = serial->port[i];
+ portdata = usb_get_serial_port_data(port);
+ for (j = 0; j < N_IN_URB; j++)
+ stop_urb(portdata->in_urbs[j]);
+ for (j = 0; j < N_OUT_URB; j++)
+ stop_urb(portdata->out_urbs[j]);
+ }
+
+ /* Now free them */
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = serial->port[i];
+ portdata = usb_get_serial_port_data(port);
+
+ for (j = 0; j < N_IN_URB; j++) {
+ if (portdata->in_urbs[j]) {
+ usb_free_urb(portdata->in_urbs[j]);
+ portdata->in_urbs[j] = NULL;
+ }
+ }
+ for (j = 0; j < N_OUT_URB; j++) {
+ if (portdata->out_urbs[j]) {
+ usb_free_urb(portdata->out_urbs[j]);
+ portdata->out_urbs[j] = NULL;
+ }
+ }
+ }
+
+ /* Now free per port private data */
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ kfree(usb_get_serial_port_data(port));
+ }
+}
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug messages");
+
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff