[deliverable/linux.git] / drivers / media / usb / 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.
 */
#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) },
	{ USB_DEVICE(SKY_IT_DIGITAL_KEY_USB_VID, SKY_IT_DIGITAL_KEY_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 * const as102_device_names[] = {
	AS102_REFERENCE_DESIGN,
	AS102_PCTV_74E,
	AS102_ELGATO_EYETV_DTT_NAME,
	AS102_NBOX_DVBT_DONGLE_NAME,
	AS102_SKY_IT_DIGITAL_KEY_NAME,
	NULL /* Terminating entry */
};

/* eLNA configuration: devices built on the reference design work best
   with 0xA0, while custom designs seem to require 0xC0 */
static uint8_t const as102_elna_cfg[] = {
	0xA0,
	0xC0,
	0xC0,
	0xA0,
	0xA0,
	0x00 /* 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 as10x_bus_adapter_t *bus_adap,
			      unsigned char *send_buf, int send_buf_len,
			      unsigned char *recv_buf, int recv_buf_len)
{
	int ret = 0;

	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) {
			dev_dbg(&bus_adap->usb_dev->dev,
				"usb_control_msg(send) failed, err %i\n", ret);
			return ret;
		}

		if (ret != send_buf_len) {
			dev_dbg(&bus_adap->usb_dev->dev,
			"only wrote %d of %d bytes\n", ret, send_buf_len);
			return -1;
		}
	}

	if (recv_buf != NULL) {
#ifdef TRACE
		dev_dbg(bus_adap->usb_dev->dev,
			"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) {
			dev_dbg(&bus_adap->usb_dev->dev,
				"usb_control_msg(recv) failed, err %i\n", ret);
			return ret;
		}
#ifdef TRACE
		dev_dbg(bus_adap->usb_dev->dev,
			"read %d bytes\n", recv_buf_len);
#endif
	}

	return ret;
}

static int as102_send_ep1(struct as10x_bus_adapter_t *bus_adap,
			  unsigned char *send_buf,
			  int send_buf_len,
			  int swap32)
{
	int ret, 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) {
		dev_dbg(&bus_adap->usb_dev->dev,
			"usb_bulk_msg(send) failed, err %i\n", ret);
		return ret;
	}

	if (actual_len != send_buf_len) {
		dev_dbg(&bus_adap->usb_dev->dev, "only wrote %d of %d bytes\n",
			actual_len, send_buf_len);
		return -1;
	}
	return actual_len;
}

static int as102_read_ep2(struct as10x_bus_adapter_t *bus_adap,
		   unsigned char *recv_buf, int recv_buf_len)
{
	int ret, 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) {
		dev_dbg(&bus_adap->usb_dev->dev,
			"usb_bulk_msg(recv) failed, err %i\n", ret);
		return ret;
	}

	if (actual_len != recv_buf_len) {
		dev_dbg(&bus_adap->usb_dev->dev, "only read %d of %d bytes\n",
			actual_len, recv_buf_len);
		return -1;
	}
	return actual_len;
}

static const 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)
		dev_dbg(&urb->dev->dev,
			"%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;

	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);
}

static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
{
	int i;

	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) {
		dev_dbg(&dev->bus_adap.usb_dev->dev,
			"%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) {
			as102_free_usb_stream_buffer(dev);
			return -ENOMEM;
		}

		urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
		urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);
		urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
		urb->transfer_buffer_length = AS102_USB_BUF_SIZE;

		dev->stream_urb[i] = urb;
	}
	return 0;
}

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;

	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);
	}
}

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

	/* 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);

	pr_info("%s: device has been disconnected\n", DRIVER_NAME);
}

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;

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

	as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
	if (as102_dev == NULL)
		return -ENOMEM;

	/* Assign the user-friendly device name */
	for (i = 0; i < ARRAY_SIZE(as102_usb_id_table); i++) {
		if (id == &as102_usb_id_table[i]) {
			as102_dev->name = as102_device_names[i];
			as102_dev->elna_cfg = as102_elna_cfg[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 */
		dev_err(&intf->dev,
			"%s: usb_register_dev() failed (errno = %d)\n",
			__func__, ret);
		goto failed;
	}

	pr_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_stream;

	/* register dvb layer */
	ret = as102_dvb_register(as102_dev);
	if (ret != 0)
		goto failed_dvb;

	return ret;

failed_dvb:
	as102_free_usb_stream_buffer(as102_dev);
failed_stream:
	usb_deregister_dev(intf, &as102_usb_class_driver);
failed:
	usb_put_dev(as102_dev->bus_adap.usb_dev);
	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;

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

	/* fetch device from usb interface */
	intf = usb_find_interface(&as102_usb_driver, minor);
	if (intf == NULL) {
		pr_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:
	return ret;
}

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

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

	return 0;
}

MODULE_DEVICE_TABLE(usb, as102_usb_id_table);
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.
41b44e04 PH	15	*/
	16	#include <linux/kernel.h>
	17	#include <linux/errno.h>
	18	#include <linux/slab.h>
	19	#include <linux/mm.h>
	20	#include <linux/usb.h>
	21
	22	#include "as102_drv.h"
	23	#include "as102_usb_drv.h"
	24	#include "as102_fw.h"
	25
	26	static void as102_usb_disconnect(struct usb_interface *interface);
	27	static int as102_usb_probe(struct usb_interface *interface,
	28	const struct usb_device_id *id);
	29
	30	static int as102_usb_start_stream(struct as102_dev_t *dev);
	31	static void as102_usb_stop_stream(struct as102_dev_t *dev);
	32
	33	static int as102_open(struct inode inode, struct file file);
	34	static int as102_release(struct inode inode, struct file file);
	35
	36	static struct usb_device_id as102_usb_id_table[] = {
	37	{ USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
	38	{ USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
5f9745b2	39	{ USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
8be62e73	40	{ USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
dd7aaa4d	41	{ USB_DEVICE(SKY_IT_DIGITAL_KEY_USB_VID, SKY_IT_DIGITAL_KEY_USB_PID) },
41b44e04 PH	42	{ } /* Terminating entry */
	43	};
	44
4f7b7c01 DH	45	/* Note that this table must always have the same number of entries as the
4f7b7c01 DH	46	as102_usb_id_table struct */
d758b9ef	47	static const char * const as102_device_names[] = {
4f7b7c01 DH	48	AS102_REFERENCE_DESIGN,
	49	AS102_PCTV_74E,
	50	AS102_ELGATO_EYETV_DTT_NAME,
8be62e73	51	AS102_NBOX_DVBT_DONGLE_NAME,
dd7aaa4d	52	AS102_SKY_IT_DIGITAL_KEY_NAME,
4f7b7c01 DH	53	NULL /* Terminating entry */
	54	};
	55
abfac0b6 GG	56	/* eLNA configuration: devices built on the reference design work best
	57	with 0xA0, while custom designs seem to require 0xC0 */
	58	static uint8_t const as102_elna_cfg[] = {
	59	0xA0,
	60	0xC0,
	61	0xC0,
	62	0xA0,
	63	0xA0,
	64	0x00 /* Terminating entry */
	65	};
	66
41b44e04	67	struct usb_driver as102_usb_driver = {
14e0e4bf SN	68	.name = DRIVER_FULL_NAME,
	69	.probe = as102_usb_probe,
	70	.disconnect = as102_usb_disconnect,
	71	.id_table = as102_usb_id_table
41b44e04 PH	72	};
41b44e04 PH	73
c7a6c001	74	static const struct file_operations as102_dev_fops = {
14e0e4bf SN	75	.owner = THIS_MODULE,
	76	.open = as102_open,
	77	.release = as102_release,
41b44e04 PH	78	};
	79
	80	static struct usb_class_driver as102_usb_class_driver = {
	81	.name = "aton2-%d",
	82	.fops = &as102_dev_fops,
	83	.minor_base = AS102_DEVICE_MAJOR,
	84	};
	85
34490a0a	86	static int as102_usb_xfer_cmd(struct as10x_bus_adapter_t *bus_adap,
41b44e04	87	unsigned char *send_buf, int send_buf_len,
c7a6c001 DH	88	unsigned char *recv_buf, int recv_buf_len)
c7a6c001 DH	89	{
41b44e04	90	int ret = 0;
41b44e04	91
c7a6c001	92	if (send_buf != NULL) {
41b44e04 PH	93	ret = usb_control_msg(bus_adap->usb_dev,
	94	usb_sndctrlpipe(bus_adap->usb_dev, 0),
	95	AS102_USB_DEVICE_TX_CTRL_CMD,
c7a6c001 DH	96	USB_DIR_OUT \| USB_TYPE_VENDOR \|
c7a6c001 DH	97	USB_RECIP_DEVICE,
41b44e04 PH	98	bus_adap->cmd_xid, /* value */
	99	0, /* index */
	100	send_buf, send_buf_len,
	101	USB_CTRL_SET_TIMEOUT /* 200 */);
c7a6c001	102	if (ret < 0) {
2179de60 MK	103	dev_dbg(&bus_adap->usb_dev->dev,
2179de60 MK	104	"usb_control_msg(send) failed, err %i\n", ret);
41b44e04 PH	105	return ret;
	106	}
	107
c7a6c001	108	if (ret != send_buf_len) {
2179de60 MK	109	dev_dbg(&bus_adap->usb_dev->dev,
2179de60 MK	110	"only wrote %d of %d bytes\n", ret, send_buf_len);
41b44e04 PH	111	return -1;
	112	}
	113	}
	114
c7a6c001	115	if (recv_buf != NULL) {
41b44e04	116	#ifdef TRACE
2179de60 MK	117	dev_dbg(bus_adap->usb_dev->dev,
2179de60 MK	118	"want to read: %d bytes\n", recv_buf_len);
41b44e04 PH	119	#endif
	120	ret = usb_control_msg(bus_adap->usb_dev,
	121	usb_rcvctrlpipe(bus_adap->usb_dev, 0),
	122	AS102_USB_DEVICE_RX_CTRL_CMD,
c7a6c001 DH	123	USB_DIR_IN \| USB_TYPE_VENDOR \|
c7a6c001 DH	124	USB_RECIP_DEVICE,
41b44e04 PH	125	bus_adap->cmd_xid, /* value */
	126	0, /* index */
	127	recv_buf, recv_buf_len,
	128	USB_CTRL_GET_TIMEOUT /* 200 */);
c7a6c001	129	if (ret < 0) {
2179de60 MK	130	dev_dbg(&bus_adap->usb_dev->dev,
2179de60 MK	131	"usb_control_msg(recv) failed, err %i\n", ret);
41b44e04 PH	132	return ret;
	133	}
	134	#ifdef TRACE
2179de60 MK	135	dev_dbg(bus_adap->usb_dev->dev,
2179de60 MK	136	"read %d bytes\n", recv_buf_len);
41b44e04 PH	137	#endif
	138	}
	139
41b44e04 PH	140	return ret;
	141	}
	142
34490a0a	143	static int as102_send_ep1(struct as10x_bus_adapter_t *bus_adap,
41b44e04 PH	144	unsigned char *send_buf,
41b44e04 PH	145	int send_buf_len,
c7a6c001 DH	146	int swap32)
c7a6c001 DH	147	{
271430ef	148	int ret, actual_len;
41b44e04	149
c7a6c001 DH	150	ret = usb_bulk_msg(bus_adap->usb_dev,
c7a6c001 DH	151	usb_sndbulkpipe(bus_adap->usb_dev, 1),
41b44e04	152	send_buf, send_buf_len, &actual_len, 200);
c7a6c001	153	if (ret) {
2179de60 MK	154	dev_dbg(&bus_adap->usb_dev->dev,
2179de60 MK	155	"usb_bulk_msg(send) failed, err %i\n", ret);
41b44e04 PH	156	return ret;
	157	}
	158
c7a6c001	159	if (actual_len != send_buf_len) {
2179de60 MK	160	dev_dbg(&bus_adap->usb_dev->dev, "only wrote %d of %d bytes\n",
2179de60 MK	161	actual_len, send_buf_len);
41b44e04 PH	162	return -1;
41b44e04 PH	163	}
271430ef	164	return actual_len;
41b44e04 PH	165	}
41b44e04 PH	166
34490a0a	167	static int as102_read_ep2(struct as10x_bus_adapter_t *bus_adap,
c7a6c001 DH	168	unsigned char *recv_buf, int recv_buf_len)
c7a6c001 DH	169	{
271430ef	170	int ret, actual_len;
41b44e04	171
c7a6c001	172	if (recv_buf == NULL)
41b44e04 PH	173	return -EINVAL;
41b44e04 PH	174
c7a6c001 DH	175	ret = usb_bulk_msg(bus_adap->usb_dev,
c7a6c001 DH	176	usb_rcvbulkpipe(bus_adap->usb_dev, 2),
41b44e04	177	recv_buf, recv_buf_len, &actual_len, 200);
c7a6c001	178	if (ret) {
2179de60 MK	179	dev_dbg(&bus_adap->usb_dev->dev,
2179de60 MK	180	"usb_bulk_msg(recv) failed, err %i\n", ret);
41b44e04 PH	181	return ret;
	182	}
	183
c7a6c001	184	if (actual_len != recv_buf_len) {
2179de60 MK	185	dev_dbg(&bus_adap->usb_dev->dev, "only read %d of %d bytes\n",
2179de60 MK	186	actual_len, recv_buf_len);
41b44e04 PH	187	return -1;
41b44e04 PH	188	}
271430ef	189	return actual_len;
41b44e04 PH	190	}
41b44e04 PH	191
f691ba98	192	static const struct as102_priv_ops_t as102_priv_ops = {
41b44e04 PH	193	.upload_fw_pkt = as102_send_ep1,
	194	.xfer_cmd = as102_usb_xfer_cmd,
	195	.as102_read_ep2 = as102_read_ep2,
	196	.start_stream = as102_usb_start_stream,
	197	.stop_stream = as102_usb_stop_stream,
	198	};
	199
c7a6c001 DH	200	static int as102_submit_urb_stream(struct as102_dev_t dev, struct urb urb)
c7a6c001 DH	201	{
41b44e04 PH	202	int err;
	203
	204	usb_fill_bulk_urb(urb,
	205	dev->bus_adap.usb_dev,
	206	usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
	207	urb->transfer_buffer,
	208	AS102_USB_BUF_SIZE,
	209	as102_urb_stream_irq,
	210	dev);
	211
c7a6c001 DH	212	err = usb_submit_urb(urb, GFP_ATOMIC);
c7a6c001 DH	213	if (err)
2179de60 MK	214	dev_dbg(&urb->dev->dev,
2179de60 MK	215	"%s: usb_submit_urb failed\n", __func__);
41b44e04 PH	216
	217	return err;
	218	}
	219
41b44e04	220	void as102_urb_stream_irq(struct urb *urb)
41b44e04 PH	221	{
	222	struct as102_dev_t *as102_dev = urb->context;
	223
	224	if (urb->actual_length > 0) {
41b44e04 PH	225	dvb_dmx_swfilter(&as102_dev->dvb_dmx,
	226	urb->transfer_buffer,
	227	urb->actual_length);
41b44e04	228	} else {
c7a6c001	229	if (urb->actual_length == 0)
41b44e04 PH	230	memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
	231	}
	232
	233	/* is not stopped, re-submit urb */
	234	if (as102_dev->streaming)
	235	as102_submit_urb_stream(as102_dev, urb);
	236	}
	237
c7a6c001 DH	238	static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
c7a6c001 DH	239	{
41b44e04 PH	240	int i;
41b44e04 PH	241
41b44e04 PH	242	for (i = 0; i < MAX_STREAM_URB; i++)
	243	usb_free_urb(dev->stream_urb[i]);
	244
9d8e18b1	245	usb_free_coherent(dev->bus_adap.usb_dev,
41b44e04 PH	246	MAX_STREAM_URB * AS102_USB_BUF_SIZE,
	247	dev->stream,
	248	dev->dma_addr);
41b44e04 PH	249	}
41b44e04 PH	250
c7a6c001 DH	251	static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
c7a6c001 DH	252	{
444f8bda	253	int i;
41b44e04	254
9d8e18b1	255	dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
41b44e04 PH	256	MAX_STREAM_URB * AS102_USB_BUF_SIZE,
	257	GFP_KERNEL,
	258	&dev->dma_addr);
	259	if (!dev->stream) {
2179de60 MK	260	dev_dbg(&dev->bus_adap.usb_dev->dev,
2179de60 MK	261	"%s: usb_buffer_alloc failed\n", __func__);
41b44e04 PH	262	return -ENOMEM;
	263	}
	264
	265	memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);
	266
	267	/* init urb buffers */
	268	for (i = 0; i < MAX_STREAM_URB; i++) {
	269	struct urb *urb;
	270
c7a6c001 DH	271	urb = usb_alloc_urb(0, GFP_ATOMIC);
c7a6c001 DH	272	if (urb == NULL) {
41b44e04 PH	273	as102_free_usb_stream_buffer(dev);
	274	return -ENOMEM;
	275	}
	276
	277	urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
f8f7be01 GG	278	urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);
f8f7be01 GG	279	urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
41b44e04 PH	280	urb->transfer_buffer_length = AS102_USB_BUF_SIZE;
	281
	282	dev->stream_urb[i] = urb;
	283	}
444f8bda	284	return 0;
41b44e04 PH	285	}
41b44e04 PH	286
c7a6c001 DH	287	static void as102_usb_stop_stream(struct as102_dev_t *dev)
c7a6c001 DH	288	{
41b44e04 PH	289	int i;
	290
	291	for (i = 0; i < MAX_STREAM_URB; i++)
	292	usb_kill_urb(dev->stream_urb[i]);
	293	}
	294
c7a6c001 DH	295	static int as102_usb_start_stream(struct as102_dev_t *dev)
c7a6c001 DH	296	{
41b44e04 PH	297	int i, ret = 0;
	298
	299	for (i = 0; i < MAX_STREAM_URB; i++) {
c7a6c001 DH	300	ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
c7a6c001 DH	301	if (ret) {
41b44e04 PH	302	as102_usb_stop_stream(dev);
	303	return ret;
	304	}
	305	}
	306
	307	return 0;
	308	}
	309
c7a6c001 DH	310	static void as102_usb_release(struct kref *kref)
c7a6c001 DH	311	{
41b44e04 PH	312	struct as102_dev_t *as102_dev;
41b44e04 PH	313
41b44e04 PH	314	as102_dev = container_of(kref, struct as102_dev_t, kref);
	315	if (as102_dev != NULL) {
	316	usb_put_dev(as102_dev->bus_adap.usb_dev);
	317	kfree(as102_dev);
	318	}
41b44e04 PH	319	}
41b44e04 PH	320
c7a6c001 DH	321	static void as102_usb_disconnect(struct usb_interface *intf)
c7a6c001 DH	322	{
41b44e04 PH	323	struct as102_dev_t *as102_dev;
41b44e04 PH	324
41b44e04 PH	325	/* extract as102_dev_t from usb_device private data */
	326	as102_dev = usb_get_intfdata(intf);
	327
	328	/* unregister dvb layer */
	329	as102_dvb_unregister(as102_dev);
	330
	331	/* free usb buffers */
	332	as102_free_usb_stream_buffer(as102_dev);
	333
	334	usb_set_intfdata(intf, NULL);
	335
	336	/* usb unregister device */
	337	usb_deregister_dev(intf, &as102_usb_class_driver);
	338
	339	/* decrement usage counter */
	340	kref_put(&as102_dev->kref, as102_usb_release);
	341
7d462fe5	342	pr_info("%s: device has been disconnected\n", DRIVER_NAME);
41b44e04 PH	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	351
4f7b7c01	352	/* This should never actually happen */
b330f606	353	if (ARRAY_SIZE(as102_usb_id_table) !=
4f7b7c01	354	(sizeof(as102_device_names) / sizeof(const char *))) {
7d462fe5	355	pr_err("Device names table invalid size");
4f7b7c01 DH	356	return -EINVAL;
	357	}
	358
eabd0eaf	359	as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
535ec049	360	if (as102_dev == NULL)
eabd0eaf	361	return -ENOMEM;
eabd0eaf	362
4f7b7c01	363	/* Assign the user-friendly device name */
b330f606	364	for (i = 0; i < ARRAY_SIZE(as102_usb_id_table); i++) {
abfac0b6	365	if (id == &as102_usb_id_table[i]) {
4f7b7c01	366	as102_dev->name = as102_device_names[i];
abfac0b6 GG	367	as102_dev->elna_cfg = as102_elna_cfg[i];
abfac0b6 GG	368	}
4f7b7c01 DH	369	}
	370
	371	if (as102_dev->name == NULL)
	372	as102_dev->name = "Unknown AS102 device";
	373
41b44e04 PH	374	/* set private callback functions */
	375	as102_dev->bus_adap.ops = &as102_priv_ops;
	376
	377	/* init cmd token for usb bus */
	378	as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
	379	as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;
	380
	381	/* init kernel device reference */
	382	kref_init(&as102_dev->kref);
	383
	384	/* store as102 device to usb_device private data */
	385	usb_set_intfdata(intf, (void *) as102_dev);
	386
	387	/* store in as102 device the usb_device pointer */
	388	as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));
	389
	390	/* we can register the device now, as it is ready */
c7a6c001 DH	391	ret = usb_register_dev(intf, &as102_usb_class_driver);
c7a6c001 DH	392	if (ret < 0) {
41b44e04	393	/* something prevented us from registering this driver */
8048926b GKH	394	dev_err(&intf->dev,
	395	"%s: usb_register_dev() failed (errno = %d)\n",
	396	__func__, ret);
41b44e04 PH	397	goto failed;
	398	}
	399
7d462fe5	400	pr_info("%s: device has been detected\n", DRIVER_NAME);
41b44e04 PH	401
41b44e04 PH	402	/* request buffer allocation for streaming */
c7a6c001 DH	403	ret = as102_alloc_usb_stream_buffer(as102_dev);
c7a6c001 DH	404	if (ret != 0)
cd19f7d3	405	goto failed_stream;
41b44e04 PH	406
	407	/* register dvb layer */
	408	ret = as102_dvb_register(as102_dev);
cd19f7d3 AK	409	if (ret != 0)
cd19f7d3 AK	410	goto failed_dvb;
41b44e04	411
41b44e04 PH	412	return ret;
41b44e04 PH	413
cd19f7d3 AK	414	failed_dvb:
	415	as102_free_usb_stream_buffer(as102_dev);
	416	failed_stream:
	417	usb_deregister_dev(intf, &as102_usb_class_driver);
41b44e04	418	failed:
cd19f7d3	419	usb_put_dev(as102_dev->bus_adap.usb_dev);
41b44e04 PH	420	usb_set_intfdata(intf, NULL);
	421	kfree(as102_dev);
	422	return ret;
	423	}
	424
c7a6c001 DH	425	static int as102_open(struct inode inode, struct file file)
c7a6c001 DH	426	{
41b44e04 PH	427	int ret = 0, minor = 0;
	428	struct usb_interface *intf = NULL;
	429	struct as102_dev_t *dev = NULL;
	430
41b44e04 PH	431	/* read minor from inode */
	432	minor = iminor(inode);
	433
	434	/* fetch device from usb interface */
c7a6c001 DH	435	intf = usb_find_interface(&as102_usb_driver, minor);
c7a6c001 DH	436	if (intf == NULL) {
7d462fe5 SN	437	pr_err("%s: can't find device for minor %d\n",
7d462fe5 SN	438	__func__, minor);
41b44e04 PH	439	ret = -ENODEV;
	440	goto exit;
	441	}
	442
	443	/* get our device */
c7a6c001 DH	444	dev = usb_get_intfdata(intf);
c7a6c001 DH	445	if (dev == NULL) {
41b44e04 PH	446	ret = -EFAULT;
	447	goto exit;
	448	}
	449
	450	/* save our device object in the file's private structure */
	451	file->private_data = dev;
	452
	453	/* increment our usage count for the device */
	454	kref_get(&dev->kref);
	455
	456	exit:
41b44e04 PH	457	return ret;
	458	}
	459
c7a6c001 DH	460	static int as102_release(struct inode inode, struct file file)
c7a6c001 DH	461	{
41b44e04 PH	462	struct as102_dev_t *dev = NULL;
41b44e04 PH	463
c7a6c001 DH	464	dev = file->private_data;
c7a6c001 DH	465	if (dev != NULL) {
41b44e04 PH	466	/* decrement the count on our device */
	467	kref_put(&dev->kref, as102_usb_release);
	468	}
	469
444f8bda	470	return 0;
41b44e04 PH	471	}
	472
	473	MODULE_DEVICE_TABLE(usb, as102_usb_id_table);