diff options
Diffstat (limited to 'drivers/staging/dabusb/dabusb.c')
| -rw-r--r-- | drivers/staging/dabusb/dabusb.c | 914 |
1 files changed, 914 insertions, 0 deletions
diff --git a/drivers/staging/dabusb/dabusb.c b/drivers/staging/dabusb/dabusb.c new file mode 100644 index 00000000000..f3e25e91366 --- /dev/null +++ b/drivers/staging/dabusb/dabusb.c @@ -0,0 +1,914 @@ +/*****************************************************************************/ + +/* + * 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/mutex.h> +#include <linux/firmware.h> +#include <linux/ihex.h> + +#include "dabusb.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) +{ + 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 + dev_err(&purb->dev->dev, + "dabusb_iso_complete: invalid len %d\n", len); + } + else + dev_warn(&purb->dev->dev, "dabusb_iso_complete: corrupted packet status: %d\n", purb->iso_frame_desc[i].status); + if (dst != purb->actual_length) + dev_err(&purb->dev->dev, + "dst!=purb->actual_length:%d!=%d\n", + dst, purb->actual_length); + } + + if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) { + s->overruns++; + dev_err(&purb->dev->dev, "overrun (%d)\n", s->overruns); + } + wake_up (&s->wait); +} +/*-------------------------------------------------------------------*/ +static int dabusb_alloc_buffers (pdabusb_t s) +{ + int transfer_len = 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 (transfer_len < (s->total_buffer_size << 10)) { + b = kzalloc(sizeof (buff_t), GFP_KERNEL); + if (!b) { + dev_err(&s->usbdev->dev, + "kzalloc(sizeof(buff_t))==NULL\n"); + goto err; + } + b->s = s; + b->purb = usb_alloc_urb(packets, GFP_KERNEL); + if (!b->purb) { + dev_err(&s->usbdev->dev, "usb_alloc_urb == NULL\n"); + kfree (b); + goto err; + } + + b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); + if (!b->purb->transfer_buffer) { + kfree (b->purb); + kfree (b); + dev_err(&s->usbdev->dev, + "kmalloc(%d)==NULL\n", 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; + } + + transfer_len += transfer_buffer_length; + list_add_tail (&b->buff_list, &s->free_buff_list); + } + s->got_mem = transfer_len; + + 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) { + dev_err(&s->usbdev->dev, + "usb_bulk_msg failed(%d)\n", ret); + + if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { + dev_err(&s->usbdev->dev, "set_interface failed\n"); + return -EINVAL; + } + + } + + if( ret == -EPIPE ) { + dev_warn(&s->usbdev->dev, "CLEAR_FEATURE request to remove STALL condition.\n"); + if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) + dev_err(&s->usbdev->dev, "request failed\n"); + } + + pb->size = actual_length; + return ret; +} +/* --------------------------------------------------------------------- */ +static int dabusb_writemem (pdabusb_t s, int pos, const unsigned char *data, + int len) +{ + int ret; + unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL); + + if (!transfer_buffer) { + dev_err(&s->usbdev->dev, + "dabusb_writemem: kmalloc(%d) failed.\n", 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; + const struct ihex_binrec *rec; + const struct firmware *uninitialized_var(fw); + + dbg("Enter dabusb_loadmem (internal)"); + + ret = request_ihex_firmware(&fw, "dabusb/firmware.fw", &s->usbdev->dev); + if (ret) { + dev_err(&s->usbdev->dev, + "Failed to load \"dabusb/firmware.fw\": %d\n", ret); + goto out; + } + ret = dabusb_8051_reset (s, 1); + + for (rec = (const struct ihex_binrec *)fw->data; rec; + rec = ihex_next_binrec(rec)) { + dbg("dabusb_writemem: %04X %p %d)", be32_to_cpu(rec->addr), + rec->data, be16_to_cpu(rec->len)); + + ret = dabusb_writemem(s, be32_to_cpu(rec->addr), rec->data, + be16_to_cpu(rec->len)); + if (ret < 0) { + dev_err(&s->usbdev->dev, + "dabusb_writemem failed (%d %04X %p %d)\n", + ret, be32_to_cpu(rec->addr), + rec->data, be16_to_cpu(rec->len)); + break; + } + } + ret = dabusb_8051_reset (s, 0); + release_firmware(fw); + out: + 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); + const struct firmware *fw; + unsigned int blen, n; + int ret; + + dbg("Enter dabusb_fpga_download (internal)"); + + if (!b) { + dev_err(&s->usbdev->dev, + "kmalloc(sizeof(bulk_transfer_t))==NULL\n"); + return -ENOMEM; + } + + ret = request_firmware(&fw, "dabusb/bitstream.bin", &s->usbdev->dev); + if (ret) { + dev_err(&s->usbdev->dev, + "Failed to load \"dabusb/bitstream.bin\": %d\n", ret); + kfree(b); + return ret; + } + + b->pipe = 1; + ret = dabusb_fpga_clear (s, b); + mdelay (10); + blen = fw->data[73] + (fw->data[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, fw->data + 74 + n, 60); + ret = dabusb_bulk (s, b); + if (ret < 0) { + dev_err(&s->usbdev->dev, "dabusb_bulk failed.\n"); + break; + } + mdelay (1); + } + + ret = dabusb_fpga_init (s, b); + kfree (b); + release_firmware(fw); + + 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) { + dev_err(&s->usbdev->dev, + "usb_submit_urb returned:%d\n", ret); + if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) + dev_err(&s->usbdev->dev, + "startrek: dabusb_add_buf_tail failed\n"); + 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); + + dev_err(&s->usbdev->dev, + "error: rec_buf_list is empty\n"); + 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); + dev_err(&s->usbdev->dev, + "error: still no buffer available.\n"); + 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)) { + dev_err(&s->usbdev->dev, "read: copy_to_user failed\n"); + 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)) + dev_err(&s->usbdev->dev, + "read: dabusb_add_buf_tail failed\n"); + 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; + int r; + + 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); + dev_err(&s->usbdev->dev, "set_interface failed\n"); + return -EINVAL; + } + s->opened = 1; + mutex_unlock(&s->mutex); + + file->f_pos = 0; + file->private_data = s; + + r = nonseekable_open(inode, file); + return r; +} + +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) + dev_err(&s->usbdev->dev, "set_interface failed\n"); + } + else + wake_up (&s->remove_ok); + + s->opened = 0; + return 0; +} + +static long dabusb_ioctl (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 = memdup_user((void __user *)arg, + sizeof(bulk_transfer_t)); + + if (IS_ERR(pbulk)) { + ret = PTR_ERR(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 const struct file_operations dabusb_fops = +{ + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = dabusb_read, + .unlocked_ioctl = dabusb_ioctl, + .open = dabusb_open, + .release = dabusb_release, +}; + +static char *dabusb_devnode(struct device *dev, mode_t *mode) +{ + return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); +} + +static struct usb_class_driver dabusb_class = { + .name = "dabusb%d", + .devnode = dabusb_devnode, + .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) { + dev_err(&intf->dev, "reset_configuration failed\n"); + 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) { + dev_err(&intf->dev, "set_interface failed\n"); + 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"); + + printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" + DRIVER_DESC "\n"); + +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_FIRMWARE("dabusb/firmware.fw"); +MODULE_FIRMWARE("dabusb/bitstream.bin"); + +module_param(buffers, int, 0); +MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); + +module_init (dabusb_init); +module_exit (dabusb_cleanup); + +/* --------------------------------------------------------------------- */ |