--- /dev/null
+/*****************************************************************************/
+
+/*
+ * dabusb.c -- dab usb driver.
+ *
+ * Copyright (C) 1999 Deti Fliegl (deti@fliegl.de)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *
+ * $Id: dabusb.c,v 1.54 2000/07/24 21:39:39 deti Exp $
+ *
+ */
+
+/*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/socket.h>
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include <linux/delay.h>
+#include <linux/usb.h>
+#include <linux/smp_lock.h>
+#include <linux/mutex.h>
+
+#include "dabusb.h"
+#include "dabfirmware.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.54"
+#define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de"
+#define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999"
+
+/* --------------------------------------------------------------------- */
+
+#ifdef CONFIG_USB_DYNAMIC_MINORS
+#define NRDABUSB 256
+#else
+#define NRDABUSB 4
+#endif
+
+/*-------------------------------------------------------------------*/
+
+static dabusb_t dabusb[NRDABUSB];
+static int buffers = 256;
+static struct usb_driver dabusb_driver;
+
+/*-------------------------------------------------------------------*/
+
+static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src)
+{
+ unsigned long flags;
+ struct list_head *tmp;
+ int ret = 0;
+
+ spin_lock_irqsave (&s->lock, flags);
+
+ if (list_empty (src)) {
+ // no elements in source buffer
+ ret = -1;
+ goto err;
+ }
+ tmp = src->next;
+ list_move_tail (tmp, dst);
+
+ err: spin_unlock_irqrestore (&s->lock, flags);
+ return ret;
+}
+/*-------------------------------------------------------------------*/
+#ifdef DEBUG
+static void dump_urb (struct urb *urb)
+{
+ dbg("urb :%p", urb);
+ dbg("dev :%p", urb->dev);
+ dbg("pipe :%08X", urb->pipe);
+ dbg("status :%d", urb->status);
+ dbg("transfer_flags :%08X", urb->transfer_flags);
+ dbg("transfer_buffer :%p", urb->transfer_buffer);
+ dbg("transfer_buffer_length:%d", urb->transfer_buffer_length);
+ dbg("actual_length :%d", urb->actual_length);
+ dbg("setup_packet :%p", urb->setup_packet);
+ dbg("start_frame :%d", urb->start_frame);
+ dbg("number_of_packets :%d", urb->number_of_packets);
+ dbg("interval :%d", urb->interval);
+ dbg("error_count :%d", urb->error_count);
+ dbg("context :%p", urb->context);
+ dbg("complete :%p", urb->complete);
+}
+#endif
+/*-------------------------------------------------------------------*/
+static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q)
+{
+ unsigned long flags;
+ pbuff_t b;
+
+ dbg("dabusb_cancel_queue");
+
+ spin_lock_irqsave (&s->lock, flags);
+
+ list_for_each_entry(b, q, buff_list) {
+#ifdef DEBUG
+ dump_urb(b->purb);
+#endif
+ usb_unlink_urb (b->purb);
+ }
+ spin_unlock_irqrestore (&s->lock, flags);
+ return 0;
+}
+/*-------------------------------------------------------------------*/
+static int dabusb_free_queue (struct list_head *q)
+{
+ struct list_head *tmp;
+ struct list_head *p;
+ pbuff_t b;
+
+ dbg("dabusb_free_queue");
+ for (p = q->next; p != q;) {
+ b = list_entry (p, buff_t, buff_list);
+
+#ifdef DEBUG
+ dump_urb(b->purb);
+#endif
+ kfree(b->purb->transfer_buffer);
+ usb_free_urb(b->purb);
+ tmp = p->next;
+ list_del (p);
+ kfree (b);
+ p = tmp;
+ }
+
+ return 0;
+}
+/*-------------------------------------------------------------------*/
+static int dabusb_free_buffers (pdabusb_t s)
+{
+ unsigned long flags;
+ dbg("dabusb_free_buffers");
+
+ spin_lock_irqsave(&s->lock, flags);
+
+ dabusb_free_queue (&s->free_buff_list);
+ dabusb_free_queue (&s->rec_buff_list);
+
+ spin_unlock_irqrestore(&s->lock, flags);
+
+ s->got_mem = 0;
+ return 0;
+}
+/*-------------------------------------------------------------------*/
+static void dabusb_iso_complete (struct urb *purb, struct pt_regs *regs)
+{
+ pbuff_t b = purb->context;
+ pdabusb_t s = b->s;
+ int i;
+ int len;
+ int dst = 0;
+ void *buf = purb->transfer_buffer;
+
+ dbg("dabusb_iso_complete");
+
+ // process if URB was not killed
+ if (purb->status != -ENOENT) {
+ unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE);
+ int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe));
+ for (i = 0; i < purb->number_of_packets; i++)
+ if (!purb->iso_frame_desc[i].status) {
+ len = purb->iso_frame_desc[i].actual_length;
+ if (len <= pipesize) {
+ memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len);
+ dst += len;
+ }
+ else
+ err("dabusb_iso_complete: invalid len %d", len);
+ }
+ else
+ warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status);
+ if (dst != purb->actual_length)
+ err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length);
+ }
+
+ if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) {
+ s->overruns++;
+ err("overrun (%d)", s->overruns);
+ }
+ wake_up (&s->wait);
+}
+/*-------------------------------------------------------------------*/
+static int dabusb_alloc_buffers (pdabusb_t s)
+{
+ int buffers = 0;
+ pbuff_t b;
+ unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE);
+ int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe));
+ int packets = _ISOPIPESIZE / pipesize;
+ int transfer_buffer_length = packets * pipesize;
+ int i;
+
+ dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d",
+ pipesize, packets, transfer_buffer_length);
+
+ while (buffers < (s->total_buffer_size << 10)) {
+ b = (pbuff_t) kzalloc (sizeof (buff_t), GFP_KERNEL);
+ if (!b) {
+ err("kzalloc(sizeof(buff_t))==NULL");
+ goto err;
+ }
+ b->s = s;
+ b->purb = usb_alloc_urb(packets, GFP_KERNEL);
+ if (!b->purb) {
+ err("usb_alloc_urb == NULL");
+ kfree (b);
+ goto err;
+ }
+
+ b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL);
+ if (!b->purb->transfer_buffer) {
+ kfree (b->purb);
+ kfree (b);
+ err("kmalloc(%d)==NULL", transfer_buffer_length);
+ goto err;
+ }
+
+ b->purb->transfer_buffer_length = transfer_buffer_length;
+ b->purb->number_of_packets = packets;
+ b->purb->complete = dabusb_iso_complete;
+ b->purb->context = b;
+ b->purb->dev = s->usbdev;
+ b->purb->pipe = pipe;
+ b->purb->transfer_flags = URB_ISO_ASAP;
+
+ for (i = 0; i < packets; i++) {
+ b->purb->iso_frame_desc[i].offset = i * pipesize;
+ b->purb->iso_frame_desc[i].length = pipesize;
+ }
+
+ buffers += transfer_buffer_length;
+ list_add_tail (&b->buff_list, &s->free_buff_list);
+ }
+ s->got_mem = buffers;
+
+ return 0;
+
+ err:
+ dabusb_free_buffers (s);
+ return -ENOMEM;
+}
+/*-------------------------------------------------------------------*/
+static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb)
+{
+ int ret;
+ unsigned int pipe;
+ int actual_length;
+
+ dbg("dabusb_bulk");
+
+ if (!pb->pipe)
+ pipe = usb_rcvbulkpipe (s->usbdev, 2);
+ else
+ pipe = usb_sndbulkpipe (s->usbdev, 2);
+
+ ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100);
+ if(ret<0) {
+ err("dabusb: usb_bulk_msg failed(%d)",ret);
+
+ if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
+ err("set_interface failed");
+ return -EINVAL;
+ }
+
+ }
+
+ if( ret == -EPIPE ) {
+ warn("CLEAR_FEATURE request to remove STALL condition.");
+ if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe)))
+ err("request failed");
+ }
+
+ pb->size = actual_length;
+ return ret;
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len)
+{
+ int ret;
+ unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL);
+
+ if (!transfer_buffer) {
+ err("dabusb_writemem: kmalloc(%d) failed.", len);
+ return -ENOMEM;
+ }
+
+ memcpy (transfer_buffer, data, len);
+
+ ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300);
+
+ kfree (transfer_buffer);
+ return ret;
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit)
+{
+ dbg("dabusb_8051_reset: %d",reset_bit);
+ return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1);
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_loadmem (pdabusb_t s, const char *fname)
+{
+ int ret;
+ PINTEL_HEX_RECORD ptr = firmware;
+
+ dbg("Enter dabusb_loadmem (internal)");
+
+ ret = dabusb_8051_reset (s, 1);
+ while (ptr->Type == 0) {
+
+ dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length);
+
+ ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length);
+ if (ret < 0) {
+ err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length);
+ break;
+ }
+ ptr++;
+ }
+ ret = dabusb_8051_reset (s, 0);
+
+ dbg("dabusb_loadmem: exit");
+
+ return ret;
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b)
+{
+ b->size = 4;
+ b->data[0] = 0x2a;
+ b->data[1] = 0;
+ b->data[2] = 0;
+ b->data[3] = 0;
+
+ dbg("dabusb_fpga_clear");
+
+ return dabusb_bulk (s, b);
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b)
+{
+ b->size = 4;
+ b->data[0] = 0x2c;
+ b->data[1] = 0;
+ b->data[2] = 0;
+ b->data[3] = 0;
+
+ dbg("dabusb_fpga_init");
+
+ return dabusb_bulk (s, b);
+}
+/* --------------------------------------------------------------------- */
+static int dabusb_fpga_download (pdabusb_t s, const char *fname)
+{
+ pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
+ unsigned int blen, n;
+ int ret;
+ unsigned char *buf = bitstream;
+
+ dbg("Enter dabusb_fpga_download (internal)");
+
+ if (!b) {
+ err("kmalloc(sizeof(bulk_transfer_t))==NULL");
+ return -ENOMEM;
+ }
+
+ b->pipe = 1;
+ ret = dabusb_fpga_clear (s, b);
+ mdelay (10);
+ blen = buf[73] + (buf[72] << 8);
+
+ dbg("Bitstream len: %i", blen);
+
+ b->data[0] = 0x2b;
+ b->data[1] = 0;
+ b->data[2] = 0;
+ b->data[3] = 60;
+
+ for (n = 0; n <= blen + 60; n += 60) {
+ // some cclks for startup
+ b->size = 64;
+ memcpy (b->data + 4, buf + 74 + n, 60);
+ ret = dabusb_bulk (s, b);
+ if (ret < 0) {
+ err("dabusb_bulk failed.");
+ break;
+ }
+ mdelay (1);
+ }
+
+ ret = dabusb_fpga_init (s, b);
+ kfree (b);
+
+ dbg("exit dabusb_fpga_download");
+
+ return ret;
+}
+
+static int dabusb_stop (pdabusb_t s)
+{
+ dbg("dabusb_stop");
+
+ s->state = _stopped;
+ dabusb_cancel_queue (s, &s->rec_buff_list);
+
+ dbg("pending_io: %d", s->pending_io.counter);
+
+ s->pending_io.counter = 0;
+ return 0;
+}
+
+static int dabusb_startrek (pdabusb_t s)
+{
+ if (!s->got_mem && s->state != _started) {
+
+ dbg("dabusb_startrek");
+
+ if (dabusb_alloc_buffers (s) < 0)
+ return -ENOMEM;
+ dabusb_stop (s);
+ s->state = _started;
+ s->readptr = 0;
+ }
+
+ if (!list_empty (&s->free_buff_list)) {
+ pbuff_t end;
+ int ret;
+
+ while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) {
+
+ dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list);
+
+ end = list_entry (s->rec_buff_list.prev, buff_t, buff_list);
+
+ ret = usb_submit_urb (end->purb, GFP_KERNEL);
+ if (ret) {
+ err("usb_submit_urb returned:%d", ret);
+ if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
+ err("startrek: dabusb_add_buf_tail failed");
+ break;
+ }
+ else
+ atomic_inc (&s->pending_io);
+ }
+ dbg("pending_io: %d",s->pending_io.counter);
+ }
+
+ return 0;
+}
+
+static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos)
+{
+ pdabusb_t s = (pdabusb_t) file->private_data;
+ unsigned long flags;
+ unsigned ret = 0;
+ int rem;
+ int cnt;
+ pbuff_t b;
+ struct urb *purb = NULL;
+
+ dbg("dabusb_read");
+
+ if (*ppos)
+ return -ESPIPE;
+
+ if (s->remove_pending)
+ return -EIO;
+
+
+ if (!s->usbdev)
+ return -EIO;
+
+ while (count > 0) {
+ dabusb_startrek (s);
+
+ spin_lock_irqsave (&s->lock, flags);
+
+ if (list_empty (&s->rec_buff_list)) {
+
+ spin_unlock_irqrestore(&s->lock, flags);
+
+ err("error: rec_buf_list is empty");
+ goto err;
+ }
+
+ b = list_entry (s->rec_buff_list.next, buff_t, buff_list);
+ purb = b->purb;
+
+ spin_unlock_irqrestore(&s->lock, flags);
+
+ if (purb->status == -EINPROGRESS) {
+ if (file->f_flags & O_NONBLOCK) // return nonblocking
+ {
+ if (!ret)
+ ret = -EAGAIN;
+ goto err;
+ }
+
+ interruptible_sleep_on (&s->wait);
+
+ if (signal_pending (current)) {
+ if (!ret)
+ ret = -ERESTARTSYS;
+ goto err;
+ }
+
+ spin_lock_irqsave (&s->lock, flags);
+
+ if (list_empty (&s->rec_buff_list)) {
+ spin_unlock_irqrestore(&s->lock, flags);
+ err("error: still no buffer available.");
+ goto err;
+ }
+ spin_unlock_irqrestore(&s->lock, flags);
+ s->readptr = 0;
+ }
+ if (s->remove_pending) {
+ ret = -EIO;
+ goto err;
+ }
+
+ rem = purb->actual_length - s->readptr; // set remaining bytes to copy
+
+ if (count >= rem)
+ cnt = rem;
+ else
+ cnt = count;
+
+ dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt);
+
+ if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) {
+ err("read: copy_to_user failed");
+ if (!ret)
+ ret = -EFAULT;
+ goto err;
+ }
+
+ s->readptr += cnt;
+ count -= cnt;
+ buf += cnt;
+ ret += cnt;
+
+ if (s->readptr == purb->actual_length) {
+ // finished, take next buffer
+ if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
+ err("read: dabusb_add_buf_tail failed");
+ s->readptr = 0;
+ }
+ }
+ err: //mutex_unlock(&s->mutex);
+ return ret;
+}
+
+static int dabusb_open (struct inode *inode, struct file *file)
+{
+ int devnum = iminor(inode);
+ pdabusb_t s;
+
+ if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
+ return -EIO;
+
+ s = &dabusb[devnum - DABUSB_MINOR];
+
+ dbg("dabusb_open");
+ mutex_lock(&s->mutex);
+
+ while (!s->usbdev || s->opened) {
+ mutex_unlock(&s->mutex);
+
+ if (file->f_flags & O_NONBLOCK) {
+ return -EBUSY;
+ }
+ msleep_interruptible(500);
+
+ if (signal_pending (current)) {
+ return -EAGAIN;
+ }
+ mutex_lock(&s->mutex);
+ }
+ if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
+ mutex_unlock(&s->mutex);
+ err("set_interface failed");
+ return -EINVAL;
+ }
+ s->opened = 1;
+ mutex_unlock(&s->mutex);
+
+ file->f_pos = 0;
+ file->private_data = s;
+
+ return nonseekable_open(inode, file);
+}
+
+static int dabusb_release (struct inode *inode, struct file *file)
+{
+ pdabusb_t s = (pdabusb_t) file->private_data;
+
+ dbg("dabusb_release");
+
+ mutex_lock(&s->mutex);
+ dabusb_stop (s);
+ dabusb_free_buffers (s);
+ mutex_unlock(&s->mutex);
+
+ if (!s->remove_pending) {
+ if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0)
+ err("set_interface failed");
+ }
+ else
+ wake_up (&s->remove_ok);
+
+ s->opened = 0;
+ return 0;
+}
+
+static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ pdabusb_t s = (pdabusb_t) file->private_data;
+ pbulk_transfer_t pbulk;
+ int ret = 0;
+ int version = DABUSB_VERSION;
+
+ dbg("dabusb_ioctl");
+
+ if (s->remove_pending)
+ return -EIO;
+
+ mutex_lock(&s->mutex);
+
+ if (!s->usbdev) {
+ mutex_unlock(&s->mutex);
+ return -EIO;
+ }
+
+ switch (cmd) {
+
+ case IOCTL_DAB_BULK:
+ pbulk = (pbulk_transfer_t) kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
+
+ if (!pbulk) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
+ ret = -EFAULT;
+ kfree (pbulk);
+ break;
+ }
+
+ ret=dabusb_bulk (s, pbulk);
+ if(ret==0)
+ if (copy_to_user((void __user *)arg, pbulk,
+ sizeof(bulk_transfer_t)))
+ ret = -EFAULT;
+ kfree (pbulk);
+ break;
+
+ case IOCTL_DAB_OVERRUNS:
+ ret = put_user (s->overruns, (unsigned int __user *) arg);
+ break;
+
+ case IOCTL_DAB_VERSION:
+ ret = put_user (version, (unsigned int __user *) arg);
+ break;
+
+ default:
+ ret = -ENOIOCTLCMD;
+ break;
+ }
+ mutex_unlock(&s->mutex);
+ return ret;
+}
+
+static struct file_operations dabusb_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = dabusb_read,
+ .ioctl = dabusb_ioctl,
+ .open = dabusb_open,
+ .release = dabusb_release,
+};
+
+static struct usb_class_driver dabusb_class = {
+ .name = "dabusb%d",
+ .fops = &dabusb_fops,
+ .minor_base = DABUSB_MINOR,
+};
+
+
+/* --------------------------------------------------------------------- */
+static int dabusb_probe (struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *usbdev = interface_to_usbdev(intf);
+ int retval;
+ pdabusb_t s;
+
+ dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d",
+ le16_to_cpu(usbdev->descriptor.idVendor),
+ le16_to_cpu(usbdev->descriptor.idProduct),
+ intf->altsetting->desc.bInterfaceNumber);
+
+ /* We don't handle multiple configurations */
+ if (usbdev->descriptor.bNumConfigurations != 1)
+ return -ENODEV;
+
+ if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF &&
+ le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999)
+ return -ENODEV;
+
+
+
+ s = &dabusb[intf->minor];
+
+ mutex_lock(&s->mutex);
+ s->remove_pending = 0;
+ s->usbdev = usbdev;
+ s->devnum = intf->minor;
+
+ if (usb_reset_configuration (usbdev) < 0) {
+ err("reset_configuration failed");
+ goto reject;
+ }
+ if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) {
+ dabusb_loadmem (s, NULL);
+ goto reject;
+ }
+ else {
+ dabusb_fpga_download (s, NULL);
+
+ if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) {
+ err("set_interface failed");
+ goto reject;
+ }
+ }
+ dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber);
+ usb_set_intfdata (intf, s);
+ mutex_unlock(&s->mutex);
+
+ retval = usb_register_dev(intf, &dabusb_class);
+ if (retval) {
+ usb_set_intfdata (intf, NULL);
+ return -ENOMEM;
+ }
+
+ return 0;
+
+ reject:
+ mutex_unlock(&s->mutex);
+ s->usbdev = NULL;
+ return -ENODEV;
+}
+
+static void dabusb_disconnect (struct usb_interface *intf)
+{
+ wait_queue_t __wait;
+ pdabusb_t s = usb_get_intfdata (intf);
+
+ dbg("dabusb_disconnect");
+
+ init_waitqueue_entry(&__wait, current);
+
+ usb_set_intfdata (intf, NULL);
+ if (s) {
+ usb_deregister_dev (intf, &dabusb_class);
+ s->remove_pending = 1;
+ wake_up (&s->wait);
+ add_wait_queue(&s->remove_ok, &__wait);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (s->state == _started)
+ schedule();
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&s->remove_ok, &__wait);
+
+ s->usbdev = NULL;
+ s->overruns = 0;
+ }
+}
+
+static struct usb_device_id dabusb_ids [] = {
+ // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */
+ { USB_DEVICE(0x0547, 0x9999) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, dabusb_ids);
+
+static struct usb_driver dabusb_driver = {
+ .name = "dabusb",
+ .probe = dabusb_probe,
+ .disconnect = dabusb_disconnect,
+ .id_table = dabusb_ids,
+};
+
+/* --------------------------------------------------------------------- */
+
+static int __init dabusb_init (void)
+{
+ int retval;
+ unsigned u;
+
+ /* initialize struct */
+ for (u = 0; u < NRDABUSB; u++) {
+ pdabusb_t s = &dabusb[u];
+ memset (s, 0, sizeof (dabusb_t));
+ mutex_init (&s->mutex);
+ s->usbdev = NULL;
+ s->total_buffer_size = buffers;
+ init_waitqueue_head (&s->wait);
+ init_waitqueue_head (&s->remove_ok);
+ spin_lock_init (&s->lock);
+ INIT_LIST_HEAD (&s->free_buff_list);
+ INIT_LIST_HEAD (&s->rec_buff_list);
+ }
+
+ /* register misc device */
+ retval = usb_register(&dabusb_driver);
+ if (retval)
+ goto out;
+
+ dbg("dabusb_init: driver registered");
+
+ info(DRIVER_VERSION ":" DRIVER_DESC);
+
+out:
+ return retval;
+}
+
+static void __exit dabusb_cleanup (void)
+{
+ dbg("dabusb_cleanup");
+
+ usb_deregister (&dabusb_driver);
+}
+
+/* --------------------------------------------------------------------- */
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+module_param(buffers, int, 0);
+MODULE_PARM_DESC (buffers, "Number of buffers (default=256)");
+
+module_init (dabusb_init);
+module_exit (dabusb_cleanup);
+
+/* --------------------------------------------------------------------- */
git://git.onelab.eu / linux-2.6.git / blobdiff