[deliverable/linux.git] / drivers / staging / media / as102 / as102_usb_drv.c

/*
 * Abilis Systems Single DVB-T Receiver
 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.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, 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.
 */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/usb.h>

#include "as102_drv.h"
#include "as102_usb_drv.h"
#include "as102_fw.h"

static void as102_usb_disconnect(struct usb_interface *interface);
static int as102_usb_probe(struct usb_interface *interface,
			   const struct usb_device_id *id);

static int as102_usb_start_stream(struct as102_dev_t *dev);
static void as102_usb_stop_stream(struct as102_dev_t *dev);

static int as102_open(struct inode *inode, struct file *file);
static int as102_release(struct inode *inode, struct file *file);

static struct usb_device_id as102_usb_id_table[] = {
	{ USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
	{ USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
	{ USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
	{ USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
	{ } /* Terminating entry */
};

/* Note that this table must always have the same number of entries as the
   as102_usb_id_table struct */
static const char *as102_device_names[] = {
	AS102_REFERENCE_DESIGN,
	AS102_PCTV_74E,
	AS102_ELGATO_EYETV_DTT_NAME,
	AS102_NBOX_DVBT_DONGLE_NAME,
	NULL /* Terminating entry */
};

struct usb_driver as102_usb_driver = {
	.name       =  DRIVER_FULL_NAME,
	.probe      =  as102_usb_probe,
	.disconnect =  as102_usb_disconnect,
	.id_table   =  as102_usb_id_table
};

static const struct file_operations as102_dev_fops = {
	.owner   = THIS_MODULE,
	.open    = as102_open,
	.release = as102_release,
};

static struct usb_class_driver as102_usb_class_driver = {
	.name		= "aton2-%d",
	.fops		= &as102_dev_fops,
	.minor_base	= AS102_DEVICE_MAJOR,
};

static int as102_usb_xfer_cmd(struct as102_bus_adapter_t *bus_adap,
			      unsigned char *send_buf, int send_buf_len,
			      unsigned char *recv_buf, int recv_buf_len)
{
	int ret = 0;
	ENTER();

	if (send_buf != NULL) {
		ret = usb_control_msg(bus_adap->usb_dev,
				      usb_sndctrlpipe(bus_adap->usb_dev, 0),
				      AS102_USB_DEVICE_TX_CTRL_CMD,
				      USB_DIR_OUT | USB_TYPE_VENDOR |
				      USB_RECIP_DEVICE,
				      bus_adap->cmd_xid, /* value */
				      0, /* index */
				      send_buf, send_buf_len,
				      USB_CTRL_SET_TIMEOUT /* 200 */);
		if (ret < 0) {
			dprintk(debug, "usb_control_msg(send) failed, err %i\n",
					ret);
			return ret;
		}

		if (ret != send_buf_len) {
			dprintk(debug, "only wrote %d of %d bytes\n",
					ret, send_buf_len);
			return -1;
		}
	}

	if (recv_buf != NULL) {
#ifdef TRACE
		dprintk(debug, "want to read: %d bytes\n", recv_buf_len);
#endif
		ret = usb_control_msg(bus_adap->usb_dev,
				      usb_rcvctrlpipe(bus_adap->usb_dev, 0),
				      AS102_USB_DEVICE_RX_CTRL_CMD,
				      USB_DIR_IN | USB_TYPE_VENDOR |
				      USB_RECIP_DEVICE,
				      bus_adap->cmd_xid, /* value */
				      0, /* index */
				      recv_buf, recv_buf_len,
				      USB_CTRL_GET_TIMEOUT /* 200 */);
		if (ret < 0) {
			dprintk(debug, "usb_control_msg(recv) failed, err %i\n",
					ret);
			return ret;
		}
#ifdef TRACE
		dprintk(debug, "read %d bytes\n", recv_buf_len);
#endif
	}

	LEAVE();
	return ret;
}

static int as102_send_ep1(struct as102_bus_adapter_t *bus_adap,
			  unsigned char *send_buf,
			  int send_buf_len,
			  int swap32)
{
	int ret = 0, actual_len;

	ret = usb_bulk_msg(bus_adap->usb_dev,
			   usb_sndbulkpipe(bus_adap->usb_dev, 1),
			   send_buf, send_buf_len, &actual_len, 200);
	if (ret) {
		dprintk(debug, "usb_bulk_msg(send) failed, err %i\n", ret);
		return ret;
	}

	if (actual_len != send_buf_len) {
		dprintk(debug, "only wrote %d of %d bytes\n",
				actual_len, send_buf_len);
		return -1;
	}
	return ret ? ret : actual_len;
}

static int as102_read_ep2(struct as102_bus_adapter_t *bus_adap,
		   unsigned char *recv_buf, int recv_buf_len)
{
	int ret = 0, actual_len;

	if (recv_buf == NULL)
		return -EINVAL;

	ret = usb_bulk_msg(bus_adap->usb_dev,
			   usb_rcvbulkpipe(bus_adap->usb_dev, 2),
			   recv_buf, recv_buf_len, &actual_len, 200);
	if (ret) {
		dprintk(debug, "usb_bulk_msg(recv) failed, err %i\n", ret);
		return ret;
	}

	if (actual_len != recv_buf_len) {
		dprintk(debug, "only read %d of %d bytes\n",
				actual_len, recv_buf_len);
		return -1;
	}
	return ret ? ret : actual_len;
}

struct as102_priv_ops_t as102_priv_ops = {
	.upload_fw_pkt	= as102_send_ep1,
	.xfer_cmd	= as102_usb_xfer_cmd,
	.as102_read_ep2	= as102_read_ep2,
	.start_stream	= as102_usb_start_stream,
	.stop_stream	= as102_usb_stop_stream,
};

static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb)
{
	int err;

	usb_fill_bulk_urb(urb,
			  dev->bus_adap.usb_dev,
			  usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
			  urb->transfer_buffer,
			  AS102_USB_BUF_SIZE,
			  as102_urb_stream_irq,
			  dev);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err)
		dprintk(debug, "%s: usb_submit_urb failed\n", __func__);

	return err;
}

void as102_urb_stream_irq(struct urb *urb)
{
	struct as102_dev_t *as102_dev = urb->context;

	if (urb->actual_length > 0) {
		dvb_dmx_swfilter(&as102_dev->dvb_dmx,
				 urb->transfer_buffer,
				 urb->actual_length);
	} else {
		if (urb->actual_length == 0)
			memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
	}

	/* is not stopped, re-submit urb */
	if (as102_dev->streaming)
		as102_submit_urb_stream(as102_dev, urb);
}

static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
{
	int i;

	ENTER();

	for (i = 0; i < MAX_STREAM_URB; i++)
		usb_free_urb(dev->stream_urb[i]);

	usb_free_coherent(dev->bus_adap.usb_dev,
			MAX_STREAM_URB * AS102_USB_BUF_SIZE,
			dev->stream,
			dev->dma_addr);
	LEAVE();
}

static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
{
	int i, ret = 0;

	ENTER();

	dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
				       MAX_STREAM_URB * AS102_USB_BUF_SIZE,
				       GFP_KERNEL,
				       &dev->dma_addr);
	if (!dev->stream) {
		dprintk(debug, "%s: usb_buffer_alloc failed\n", __func__);
		return -ENOMEM;
	}

	memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);

	/* init urb buffers */
	for (i = 0; i < MAX_STREAM_URB; i++) {
		struct urb *urb;

		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (urb == NULL) {
			dprintk(debug, "%s: usb_alloc_urb failed\n", __func__);
			as102_free_usb_stream_buffer(dev);
			return -ENOMEM;
		}

		urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
		urb->transfer_buffer_length = AS102_USB_BUF_SIZE;

		dev->stream_urb[i] = urb;
	}
	LEAVE();
	return ret;
}

static void as102_usb_stop_stream(struct as102_dev_t *dev)
{
	int i;

	for (i = 0; i < MAX_STREAM_URB; i++)
		usb_kill_urb(dev->stream_urb[i]);
}

static int as102_usb_start_stream(struct as102_dev_t *dev)
{
	int i, ret = 0;

	for (i = 0; i < MAX_STREAM_URB; i++) {
		ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
		if (ret) {
			as102_usb_stop_stream(dev);
			return ret;
		}
	}

	return 0;
}

static void as102_usb_release(struct kref *kref)
{
	struct as102_dev_t *as102_dev;

	ENTER();

	as102_dev = container_of(kref, struct as102_dev_t, kref);
	if (as102_dev != NULL) {
		usb_put_dev(as102_dev->bus_adap.usb_dev);
		kfree(as102_dev);
	}

	LEAVE();
}

static void as102_usb_disconnect(struct usb_interface *intf)
{
	struct as102_dev_t *as102_dev;

	ENTER();

	/* extract as102_dev_t from usb_device private data */
	as102_dev = usb_get_intfdata(intf);

	/* unregister dvb layer */
	as102_dvb_unregister(as102_dev);

	/* free usb buffers */
	as102_free_usb_stream_buffer(as102_dev);

	usb_set_intfdata(intf, NULL);

	/* usb unregister device */
	usb_deregister_dev(intf, &as102_usb_class_driver);

	/* decrement usage counter */
	kref_put(&as102_dev->kref, as102_usb_release);

	printk(KERN_INFO "%s: device has been disconnected\n", DRIVER_NAME);

	LEAVE();
}

static int as102_usb_probe(struct usb_interface *intf,
			   const struct usb_device_id *id)
{
	int ret;
	struct as102_dev_t *as102_dev;
	int i;

	ENTER();

	as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
	if (as102_dev == NULL) {
		err("%s: kzalloc failed", __func__);
		return -ENOMEM;
	}

	/* This should never actually happen */
	if ((sizeof(as102_usb_id_table) / sizeof(struct usb_device_id)) !=
	    (sizeof(as102_device_names) / sizeof(const char *))) {
		printk(KERN_ERR "Device names table invalid size");
		return -EINVAL;
	}

	/* Assign the user-friendly device name */
	for (i = 0; i < (sizeof(as102_usb_id_table) /
			 sizeof(struct usb_device_id)); i++) {
		if (id == &as102_usb_id_table[i])
			as102_dev->name = as102_device_names[i];
	}

	if (as102_dev->name == NULL)
		as102_dev->name = "Unknown AS102 device";

	/* set private callback functions */
	as102_dev->bus_adap.ops = &as102_priv_ops;

	/* init cmd token for usb bus */
	as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
	as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;

	/* init kernel device reference */
	kref_init(&as102_dev->kref);

	/* store as102 device to usb_device private data */
	usb_set_intfdata(intf, (void *) as102_dev);

	/* store in as102 device the usb_device pointer */
	as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));

	/* we can register the device now, as it is ready */
	ret = usb_register_dev(intf, &as102_usb_class_driver);
	if (ret < 0) {
		/* something prevented us from registering this driver */
		err("%s: usb_register_dev() failed (errno = %d)",
		    __func__, ret);
		goto failed;
	}

	printk(KERN_INFO "%s: device has been detected\n", DRIVER_NAME);

	/* request buffer allocation for streaming */
	ret = as102_alloc_usb_stream_buffer(as102_dev);
	if (ret != 0)
		goto failed;

	/* register dvb layer */
	ret = as102_dvb_register(as102_dev);

	LEAVE();
	return ret;

failed:
	usb_set_intfdata(intf, NULL);
	kfree(as102_dev);
	return ret;
}

static int as102_open(struct inode *inode, struct file *file)
{
	int ret = 0, minor = 0;
	struct usb_interface *intf = NULL;
	struct as102_dev_t *dev = NULL;

	ENTER();

	/* read minor from inode */
	minor = iminor(inode);

	/* fetch device from usb interface */
	intf = usb_find_interface(&as102_usb_driver, minor);
	if (intf == NULL) {
		printk(KERN_ERR "%s: can't find device for minor %d\n",
				__func__, minor);
		ret = -ENODEV;
		goto exit;
	}

	/* get our device */
	dev = usb_get_intfdata(intf);
	if (dev == NULL) {
		ret = -EFAULT;
		goto exit;
	}

	/* save our device object in the file's private structure */
	file->private_data = dev;

	/* increment our usage count for the device */
	kref_get(&dev->kref);

exit:
	LEAVE();
	return ret;
}

static int as102_release(struct inode *inode, struct file *file)
{
	int ret = 0;
	struct as102_dev_t *dev = NULL;

	ENTER();

	dev = file->private_data;
	if (dev != NULL) {
		/* decrement the count on our device */
		kref_put(&dev->kref, as102_usb_release);
	}

	LEAVE();
	return ret;
}

MODULE_DEVICE_TABLE(usb, as102_usb_id_table);

/* EOF - vim: set textwidth=80 ts=8 sw=8 sts=8 noet: */
Commit	Line	Data
41b44e04 PH	1	/*
	2	* Abilis Systems Single DVB-T Receiver
	3	* Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
c7a6c001	4	* Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
41b44e04 PH	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2, or (at your option)
	9	* any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20	#include <linux/kernel.h>
	21	#include <linux/errno.h>
	22	#include <linux/slab.h>
	23	#include <linux/mm.h>
	24	#include <linux/usb.h>
	25
	26	#include "as102_drv.h"
	27	#include "as102_usb_drv.h"
	28	#include "as102_fw.h"
	29
	30	static void as102_usb_disconnect(struct usb_interface *interface);
	31	static int as102_usb_probe(struct usb_interface *interface,
	32	const struct usb_device_id *id);
	33
	34	static int as102_usb_start_stream(struct as102_dev_t *dev);
	35	static void as102_usb_stop_stream(struct as102_dev_t *dev);
	36
	37	static int as102_open(struct inode inode, struct file file);
	38	static int as102_release(struct inode inode, struct file file);
	39
	40	static struct usb_device_id as102_usb_id_table[] = {
	41	{ USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
	42	{ USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
5f9745b2	43	{ USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
8be62e73	44	{ USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
41b44e04 PH	45	{ } /* Terminating entry */
	46	};
	47
4f7b7c01 DH	48	/* Note that this table must always have the same number of entries as the
	49	as102_usb_id_table struct */
	50	static const char *as102_device_names[] = {
	51	AS102_REFERENCE_DESIGN,
	52	AS102_PCTV_74E,
	53	AS102_ELGATO_EYETV_DTT_NAME,
8be62e73	54	AS102_NBOX_DVBT_DONGLE_NAME,
4f7b7c01 DH	55	NULL /* Terminating entry */
	56	};
	57
41b44e04 PH	58	struct usb_driver as102_usb_driver = {
	59	.name = DRIVER_FULL_NAME,
	60	.probe = as102_usb_probe,
	61	.disconnect = as102_usb_disconnect,
	62	.id_table = as102_usb_id_table
	63	};
	64
c7a6c001	65	static const struct file_operations as102_dev_fops = {
41b44e04 PH	66	.owner = THIS_MODULE,
	67	.open = as102_open,
	68	.release = as102_release,
	69	};
	70
	71	static struct usb_class_driver as102_usb_class_driver = {
	72	.name = "aton2-%d",
	73	.fops = &as102_dev_fops,
	74	.minor_base = AS102_DEVICE_MAJOR,
	75	};
	76
	77	static int as102_usb_xfer_cmd(struct as102_bus_adapter_t *bus_adap,
	78	unsigned char *send_buf, int send_buf_len,
c7a6c001 DH	79	unsigned char *recv_buf, int recv_buf_len)
c7a6c001 DH	80	{
41b44e04 PH	81	int ret = 0;
	82	ENTER();
	83
c7a6c001	84	if (send_buf != NULL) {
41b44e04 PH	85	ret = usb_control_msg(bus_adap->usb_dev,
	86	usb_sndctrlpipe(bus_adap->usb_dev, 0),
	87	AS102_USB_DEVICE_TX_CTRL_CMD,
c7a6c001 DH	88	USB_DIR_OUT \| USB_TYPE_VENDOR \|
c7a6c001 DH	89	USB_RECIP_DEVICE,
41b44e04 PH	90	bus_adap->cmd_xid, /* value */
	91	0, /* index */
	92	send_buf, send_buf_len,
	93	USB_CTRL_SET_TIMEOUT /* 200 */);
c7a6c001	94	if (ret < 0) {
41b44e04 PH	95	dprintk(debug, "usb_control_msg(send) failed, err %i\n",
	96	ret);
	97	return ret;
	98	}
	99
c7a6c001	100	if (ret != send_buf_len) {
41b44e04 PH	101	dprintk(debug, "only wrote %d of %d bytes\n",
	102	ret, send_buf_len);
	103	return -1;
	104	}
	105	}
	106
c7a6c001	107	if (recv_buf != NULL) {
41b44e04 PH	108	#ifdef TRACE
	109	dprintk(debug, "want to read: %d bytes\n", recv_buf_len);
	110	#endif
	111	ret = usb_control_msg(bus_adap->usb_dev,
	112	usb_rcvctrlpipe(bus_adap->usb_dev, 0),
	113	AS102_USB_DEVICE_RX_CTRL_CMD,
c7a6c001 DH	114	USB_DIR_IN \| USB_TYPE_VENDOR \|
c7a6c001 DH	115	USB_RECIP_DEVICE,
41b44e04 PH	116	bus_adap->cmd_xid, /* value */
	117	0, /* index */
	118	recv_buf, recv_buf_len,
	119	USB_CTRL_GET_TIMEOUT /* 200 */);
c7a6c001	120	if (ret < 0) {
41b44e04 PH	121	dprintk(debug, "usb_control_msg(recv) failed, err %i\n",
	122	ret);
	123	return ret;
	124	}
	125	#ifdef TRACE
	126	dprintk(debug, "read %d bytes\n", recv_buf_len);
	127	#endif
	128	}
	129
	130	LEAVE();
	131	return ret;
	132	}
	133
	134	static int as102_send_ep1(struct as102_bus_adapter_t *bus_adap,
	135	unsigned char *send_buf,
	136	int send_buf_len,
c7a6c001 DH	137	int swap32)
c7a6c001 DH	138	{
41b44e04 PH	139	int ret = 0, actual_len;
41b44e04 PH	140
c7a6c001 DH	141	ret = usb_bulk_msg(bus_adap->usb_dev,
c7a6c001 DH	142	usb_sndbulkpipe(bus_adap->usb_dev, 1),
41b44e04	143	send_buf, send_buf_len, &actual_len, 200);
c7a6c001	144	if (ret) {
41b44e04 PH	145	dprintk(debug, "usb_bulk_msg(send) failed, err %i\n", ret);
	146	return ret;
	147	}
	148
c7a6c001	149	if (actual_len != send_buf_len) {
41b44e04 PH	150	dprintk(debug, "only wrote %d of %d bytes\n",
	151	actual_len, send_buf_len);
	152	return -1;
	153	}
	154	return ret ? ret : actual_len;
	155	}
	156
	157	static int as102_read_ep2(struct as102_bus_adapter_t *bus_adap,
c7a6c001 DH	158	unsigned char *recv_buf, int recv_buf_len)
c7a6c001 DH	159	{
41b44e04 PH	160	int ret = 0, actual_len;
41b44e04 PH	161
c7a6c001	162	if (recv_buf == NULL)
41b44e04 PH	163	return -EINVAL;
41b44e04 PH	164
c7a6c001 DH	165	ret = usb_bulk_msg(bus_adap->usb_dev,
c7a6c001 DH	166	usb_rcvbulkpipe(bus_adap->usb_dev, 2),
41b44e04	167	recv_buf, recv_buf_len, &actual_len, 200);
c7a6c001	168	if (ret) {
41b44e04 PH	169	dprintk(debug, "usb_bulk_msg(recv) failed, err %i\n", ret);
	170	return ret;
	171	}
	172
c7a6c001	173	if (actual_len != recv_buf_len) {
41b44e04 PH	174	dprintk(debug, "only read %d of %d bytes\n",
	175	actual_len, recv_buf_len);
	176	return -1;
	177	}
	178	return ret ? ret : actual_len;
	179	}
	180
	181	struct as102_priv_ops_t as102_priv_ops = {
	182	.upload_fw_pkt = as102_send_ep1,
	183	.xfer_cmd = as102_usb_xfer_cmd,
	184	.as102_read_ep2 = as102_read_ep2,
	185	.start_stream = as102_usb_start_stream,
	186	.stop_stream = as102_usb_stop_stream,
	187	};
	188
c7a6c001 DH	189	static int as102_submit_urb_stream(struct as102_dev_t dev, struct urb urb)
c7a6c001 DH	190	{
41b44e04 PH	191	int err;
	192
	193	usb_fill_bulk_urb(urb,
	194	dev->bus_adap.usb_dev,
	195	usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
	196	urb->transfer_buffer,
	197	AS102_USB_BUF_SIZE,
	198	as102_urb_stream_irq,
	199	dev);
	200
c7a6c001 DH	201	err = usb_submit_urb(urb, GFP_ATOMIC);
	202	if (err)
	203	dprintk(debug, "%s: usb_submit_urb failed\n", __func__);
41b44e04 PH	204
	205	return err;
	206	}
	207
41b44e04	208	void as102_urb_stream_irq(struct urb *urb)
41b44e04 PH	209	{
	210	struct as102_dev_t *as102_dev = urb->context;
	211
	212	if (urb->actual_length > 0) {
41b44e04 PH	213	dvb_dmx_swfilter(&as102_dev->dvb_dmx,
	214	urb->transfer_buffer,
	215	urb->actual_length);
41b44e04	216	} else {
c7a6c001	217	if (urb->actual_length == 0)
41b44e04 PH	218	memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
	219	}
	220
	221	/* is not stopped, re-submit urb */
	222	if (as102_dev->streaming)
	223	as102_submit_urb_stream(as102_dev, urb);
	224	}
	225
c7a6c001 DH	226	static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
c7a6c001 DH	227	{
41b44e04 PH	228	int i;
	229
	230	ENTER();
	231
	232	for (i = 0; i < MAX_STREAM_URB; i++)
	233	usb_free_urb(dev->stream_urb[i]);
	234
9d8e18b1	235	usb_free_coherent(dev->bus_adap.usb_dev,
41b44e04 PH	236	MAX_STREAM_URB * AS102_USB_BUF_SIZE,
	237	dev->stream,
	238	dev->dma_addr);
	239	LEAVE();
	240	}
	241
c7a6c001 DH	242	static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
c7a6c001 DH	243	{
41b44e04 PH	244	int i, ret = 0;
	245
	246	ENTER();
	247
9d8e18b1	248	dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
41b44e04 PH	249	MAX_STREAM_URB * AS102_USB_BUF_SIZE,
	250	GFP_KERNEL,
	251	&dev->dma_addr);
	252	if (!dev->stream) {
c7a6c001	253	dprintk(debug, "%s: usb_buffer_alloc failed\n", __func__);
41b44e04 PH	254	return -ENOMEM;
	255	}
	256
	257	memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);
	258
	259	/* init urb buffers */
	260	for (i = 0; i < MAX_STREAM_URB; i++) {
	261	struct urb *urb;
	262
c7a6c001 DH	263	urb = usb_alloc_urb(0, GFP_ATOMIC);
	264	if (urb == NULL) {
	265	dprintk(debug, "%s: usb_alloc_urb failed\n", __func__);
41b44e04 PH	266	as102_free_usb_stream_buffer(dev);
	267	return -ENOMEM;
	268	}
	269
	270	urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
	271	urb->transfer_buffer_length = AS102_USB_BUF_SIZE;
	272
	273	dev->stream_urb[i] = urb;
	274	}
	275	LEAVE();
	276	return ret;
	277	}
	278
c7a6c001 DH	279	static void as102_usb_stop_stream(struct as102_dev_t *dev)
c7a6c001 DH	280	{
41b44e04 PH	281	int i;
	282
	283	for (i = 0; i < MAX_STREAM_URB; i++)
	284	usb_kill_urb(dev->stream_urb[i]);
	285	}
	286
c7a6c001 DH	287	static int as102_usb_start_stream(struct as102_dev_t *dev)
c7a6c001 DH	288	{
41b44e04 PH	289	int i, ret = 0;
	290
	291	for (i = 0; i < MAX_STREAM_URB; i++) {
c7a6c001 DH	292	ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
c7a6c001 DH	293	if (ret) {
41b44e04 PH	294	as102_usb_stop_stream(dev);
	295	return ret;
	296	}
	297	}
	298
	299	return 0;
	300	}
	301
c7a6c001 DH	302	static void as102_usb_release(struct kref *kref)
c7a6c001 DH	303	{
41b44e04 PH	304	struct as102_dev_t *as102_dev;
	305
	306	ENTER();
	307
	308	as102_dev = container_of(kref, struct as102_dev_t, kref);
	309	if (as102_dev != NULL) {
	310	usb_put_dev(as102_dev->bus_adap.usb_dev);
	311	kfree(as102_dev);
	312	}
	313
	314	LEAVE();
	315	}
	316
c7a6c001 DH	317	static void as102_usb_disconnect(struct usb_interface *intf)
c7a6c001 DH	318	{
41b44e04 PH	319	struct as102_dev_t *as102_dev;
	320
	321	ENTER();
	322
	323	/* extract as102_dev_t from usb_device private data */
	324	as102_dev = usb_get_intfdata(intf);
	325
	326	/* unregister dvb layer */
	327	as102_dvb_unregister(as102_dev);
	328
	329	/* free usb buffers */
	330	as102_free_usb_stream_buffer(as102_dev);
	331
	332	usb_set_intfdata(intf, NULL);
	333
	334	/* usb unregister device */
	335	usb_deregister_dev(intf, &as102_usb_class_driver);
	336
	337	/* decrement usage counter */
	338	kref_put(&as102_dev->kref, as102_usb_release);
	339
	340	printk(KERN_INFO "%s: device has been disconnected\n", DRIVER_NAME);
	341
	342	LEAVE();
	343	}
	344
	345	static int as102_usb_probe(struct usb_interface *intf,
c7a6c001 DH	346	const struct usb_device_id *id)
c7a6c001 DH	347	{
41b44e04 PH	348	int ret;
41b44e04 PH	349	struct as102_dev_t *as102_dev;
4f7b7c01	350	int i;
41b44e04 PH	351
	352	ENTER();
	353
c7a6c001 DH	354	as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
	355	if (as102_dev == NULL) {
	356	err("%s: kzalloc failed", __func__);
41b44e04 PH	357	return -ENOMEM;
	358	}
	359
4f7b7c01 DH	360	/* This should never actually happen */
	361	if ((sizeof(as102_usb_id_table) / sizeof(struct usb_device_id)) !=
	362	(sizeof(as102_device_names) / sizeof(const char *))) {
	363	printk(KERN_ERR "Device names table invalid size");
	364	return -EINVAL;
	365	}
	366
	367	/* Assign the user-friendly device name */
	368	for (i = 0; i < (sizeof(as102_usb_id_table) /
	369	sizeof(struct usb_device_id)); i++) {
	370	if (id == &as102_usb_id_table[i])
	371	as102_dev->name = as102_device_names[i];
	372	}
	373
	374	if (as102_dev->name == NULL)
	375	as102_dev->name = "Unknown AS102 device";
	376
41b44e04 PH	377	/* set private callback functions */
	378	as102_dev->bus_adap.ops = &as102_priv_ops;
	379
	380	/* init cmd token for usb bus */
	381	as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
	382	as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;
	383
	384	/* init kernel device reference */
	385	kref_init(&as102_dev->kref);
	386
	387	/* store as102 device to usb_device private data */
	388	usb_set_intfdata(intf, (void *) as102_dev);
	389
	390	/* store in as102 device the usb_device pointer */
	391	as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));
	392
	393	/* we can register the device now, as it is ready */
c7a6c001 DH	394	ret = usb_register_dev(intf, &as102_usb_class_driver);
c7a6c001 DH	395	if (ret < 0) {
41b44e04 PH	396	/* something prevented us from registering this driver */
41b44e04 PH	397	err("%s: usb_register_dev() failed (errno = %d)",
c7a6c001	398	__func__, ret);
41b44e04 PH	399	goto failed;
	400	}
	401
	402	printk(KERN_INFO "%s: device has been detected\n", DRIVER_NAME);
	403
	404	/* request buffer allocation for streaming */
c7a6c001 DH	405	ret = as102_alloc_usb_stream_buffer(as102_dev);
c7a6c001 DH	406	if (ret != 0)
41b44e04 PH	407	goto failed;
	408
	409	/* register dvb layer */
	410	ret = as102_dvb_register(as102_dev);
	411
	412	LEAVE();
	413	return ret;
	414
	415	failed:
	416	usb_set_intfdata(intf, NULL);
	417	kfree(as102_dev);
	418	return ret;
	419	}
	420
c7a6c001 DH	421	static int as102_open(struct inode inode, struct file file)
c7a6c001 DH	422	{
41b44e04 PH	423	int ret = 0, minor = 0;
	424	struct usb_interface *intf = NULL;
	425	struct as102_dev_t *dev = NULL;
	426
	427	ENTER();
	428
	429	/* read minor from inode */
	430	minor = iminor(inode);
	431
	432	/* fetch device from usb interface */
c7a6c001 DH	433	intf = usb_find_interface(&as102_usb_driver, minor);
c7a6c001 DH	434	if (intf == NULL) {
41b44e04	435	printk(KERN_ERR "%s: can't find device for minor %d\n",
c7a6c001	436	__func__, minor);
41b44e04 PH	437	ret = -ENODEV;
	438	goto exit;
	439	}
	440
	441	/* get our device */
c7a6c001 DH	442	dev = usb_get_intfdata(intf);
c7a6c001 DH	443	if (dev == NULL) {
41b44e04 PH	444	ret = -EFAULT;
	445	goto exit;
	446	}
	447
	448	/* save our device object in the file's private structure */
	449	file->private_data = dev;
	450
	451	/* increment our usage count for the device */
	452	kref_get(&dev->kref);
	453
	454	exit:
	455	LEAVE();
	456	return ret;
	457	}
	458
c7a6c001 DH	459	static int as102_release(struct inode inode, struct file file)
c7a6c001 DH	460	{
41b44e04 PH	461	int ret = 0;
	462	struct as102_dev_t *dev = NULL;
	463
	464	ENTER();
	465
c7a6c001 DH	466	dev = file->private_data;
c7a6c001 DH	467	if (dev != NULL) {
41b44e04 PH	468	/* decrement the count on our device */
	469	kref_put(&dev->kref, as102_usb_release);
	470	}
	471
	472	LEAVE();
	473	return ret;
	474	}
	475
	476	MODULE_DEVICE_TABLE(usb, as102_usb_id_table);
	477
	478	/* EOF - vim: set textwidth=80 ts=8 sw=8 sts=8 noet: */