drivers/media/usb/dvb-usb/dib0700_core.c

/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
 *
 *	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, version 2.
 *
 *  Copyright (C) 2005-6 DiBcom, SA
 */
#include "dib0700.h"

/* debug */
int dvb_usb_dib0700_debug;
module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

static int nb_packet_buffer_size = 21;
module_param(nb_packet_buffer_size, int, 0644);
MODULE_PARM_DESC(nb_packet_buffer_size,
	"Set the dib0700 driver data buffer size. This parameter "
	"corresponds to the number of TS packets. The actual size of "
	"the data buffer corresponds to this parameter "
	"multiplied by 188 (default: 21)");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);


int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
			u32 *romversion, u32 *ramversion, u32 *fwtype)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return -EINTR;
	}

	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
				  REQUEST_GET_VERSION,
				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
				  st->buf, 16, USB_CTRL_GET_TIMEOUT);
	if (hwversion != NULL)
		*hwversion  = (st->buf[0] << 24)  | (st->buf[1] << 16)  |
			(st->buf[2] << 8)  | st->buf[3];
	if (romversion != NULL)
		*romversion = (st->buf[4] << 24)  | (st->buf[5] << 16)  |
			(st->buf[6] << 8)  | st->buf[7];
	if (ramversion != NULL)
		*ramversion = (st->buf[8] << 24)  | (st->buf[9] << 16)  |
			(st->buf[10] << 8) | st->buf[11];
	if (fwtype != NULL)
		*fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
			(st->buf[14] << 8) | st->buf[15];
	mutex_unlock(&d->usb_mutex);
	return ret;
}

/* expecting rx buffer: request data[0] data[1] ... data[2] */
static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
{
	int status;

	deb_data(">>> ");
	debug_dump(tx, txlen, deb_data);

	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
		tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
		USB_CTRL_GET_TIMEOUT);

	if (status != txlen)
		deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

	return status < 0 ? status : 0;
}

/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
	u16 index, value;
	int status;

	if (txlen < 2) {
		err("tx buffer length is smaller than 2. Makes no sense.");
		return -EINVAL;
	}
	if (txlen > 4) {
		err("tx buffer length is larger than 4. Not supported.");
		return -EINVAL;
	}

	deb_data(">>> ");
	debug_dump(tx,txlen,deb_data);

	value = ((txlen - 2) << 8) | tx[1];
	index = 0;
	if (txlen > 2)
		index |= (tx[2] << 8);
	if (txlen > 3)
		index |= tx[3];

	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
			USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
			USB_CTRL_GET_TIMEOUT);

	if (status < 0)
		deb_info("ep 0 read error (status = %d)\n",status);

	deb_data("<<< ");
	debug_dump(rx, rxlen, deb_data);

	return status; /* length in case of success */
}

int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return -EINTR;
	}

	st->buf[0] = REQUEST_SET_GPIO;
	st->buf[1] = gpio;
	st->buf[2] = ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6);

	ret = dib0700_ctrl_wr(d, st->buf, 3);

	mutex_unlock(&d->usb_mutex);
	return ret;
}

static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (st->fw_version >= 0x10201) {
		if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
			err("could not acquire lock");
			return -EINTR;
		}

		st->buf[0] = REQUEST_SET_USB_XFER_LEN;
		st->buf[1] = (nb_ts_packets >> 8) & 0xff;
		st->buf[2] = nb_ts_packets & 0xff;

		deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);

		ret = dib0700_ctrl_wr(d, st->buf, 3);
		mutex_unlock(&d->usb_mutex);
	} else {
		deb_info("this firmware does not allow to change the USB xfer len\n");
		ret = -EIO;
	}

	return ret;
}

/*
 * I2C master xfer function (supported in 1.20 firmware)
 */
static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
				int num)
{
	/* The new i2c firmware messages are more reliable and in particular
	   properly support i2c read calls not preceded by a write */

	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;
	uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
	uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
	uint8_t en_start = 0;
	uint8_t en_stop = 0;
	int result, i;

	/* Ensure nobody else hits the i2c bus while we're sending our
	   sequence of messages, (such as the remote control thread) */
	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EINTR;

	for (i = 0; i < num; i++) {
		if (i == 0) {
			/* First message in the transaction */
			en_start = 1;
		} else if (!(msg[i].flags & I2C_M_NOSTART)) {
			/* Device supports repeated-start */
			en_start = 1;
		} else {
			/* Not the first packet and device doesn't support
			   repeated start */
			en_start = 0;
		}
		if (i == (num - 1)) {
			/* Last message in the transaction */
			en_stop = 1;
		}

		if (msg[i].flags & I2C_M_RD) {
			/* Read request */
			u16 index, value;
			uint8_t i2c_dest;

			i2c_dest = (msg[i].addr << 1);
			value = ((en_start << 7) | (en_stop << 6) |
				 (msg[i].len & 0x3F)) << 8 | i2c_dest;
			/* I2C ctrl + FE bus; */
			index = ((gen_mode << 6) & 0xC0) |
				((bus_mode << 4) & 0x30);

			result = usb_control_msg(d->udev,
						 usb_rcvctrlpipe(d->udev, 0),
						 REQUEST_NEW_I2C_READ,
						 USB_TYPE_VENDOR | USB_DIR_IN,
						 value, index, st->buf,
						 msg[i].len,
						 USB_CTRL_GET_TIMEOUT);
			if (result < 0) {
				deb_info("i2c read error (status = %d)\n", result);
				break;
			}

			if (msg[i].len > sizeof(st->buf)) {
				deb_info("buffer too small to fit %d bytes\n",
					 msg[i].len);
				return -EIO;
			}

			memcpy(msg[i].buf, st->buf, msg[i].len);

			deb_data("<<< ");
			debug_dump(msg[i].buf, msg[i].len, deb_data);

		} else {
			/* Write request */
			if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
				err("could not acquire lock");
				mutex_unlock(&d->i2c_mutex);
				return -EINTR;
			}
			st->buf[0] = REQUEST_NEW_I2C_WRITE;
			st->buf[1] = msg[i].addr << 1;
			st->buf[2] = (en_start << 7) | (en_stop << 6) |
				(msg[i].len & 0x3F);
			/* I2C ctrl + FE bus; */
			st->buf[3] = ((gen_mode << 6) & 0xC0) |
				 ((bus_mode << 4) & 0x30);

			if (msg[i].len > sizeof(st->buf) - 4) {
				deb_info("i2c message to big: %d\n",
					 msg[i].len);
				return -EIO;
			}

			/* The Actual i2c payload */
			memcpy(&st->buf[4], msg[i].buf, msg[i].len);

			deb_data(">>> ");
			debug_dump(st->buf, msg[i].len + 4, deb_data);

			result = usb_control_msg(d->udev,
						 usb_sndctrlpipe(d->udev, 0),
						 REQUEST_NEW_I2C_WRITE,
						 USB_TYPE_VENDOR | USB_DIR_OUT,
						 0, 0, st->buf, msg[i].len + 4,
						 USB_CTRL_GET_TIMEOUT);
			mutex_unlock(&d->usb_mutex);
			if (result < 0) {
				deb_info("i2c write error (status = %d)\n", result);
				break;
			}
		}
	}
	mutex_unlock(&d->i2c_mutex);
	return i;
}

/*
 * I2C master xfer function (pre-1.20 firmware)
 */
static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
				   struct i2c_msg *msg, int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;
	int i,len;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EINTR;
	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		mutex_unlock(&d->i2c_mutex);
		return -EINTR;
	}

	for (i = 0; i < num; i++) {
		/* fill in the address */
		st->buf[1] = msg[i].addr << 1;
		/* fill the buffer */
		if (msg[i].len > sizeof(st->buf) - 2) {
			deb_info("i2c xfer to big: %d\n",
				msg[i].len);
			return -EIO;
		}
		memcpy(&st->buf[2], msg[i].buf, msg[i].len);

		/* write/read request */
		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
			st->buf[0] = REQUEST_I2C_READ;
			st->buf[1] |= 1;

			/* special thing in the current firmware: when length is zero the read-failed */
			len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2,
					      st->buf, msg[i + 1].len);
			if (len <= 0) {
				deb_info("I2C read failed on address 0x%02x\n",
						msg[i].addr);
				break;
			}

			if (msg[i + 1].len > sizeof(st->buf)) {
				deb_info("i2c xfer buffer to small for %d\n",
					msg[i].len);
				return -EIO;
			}
			memcpy(msg[i + 1].buf, st->buf, msg[i + 1].len);

			msg[i+1].len = len;

			i++;
		} else {
			st->buf[0] = REQUEST_I2C_WRITE;
			if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0)
				break;
		}
	}
	mutex_unlock(&d->usb_mutex);
	mutex_unlock(&d->i2c_mutex);

	return i;
}

static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
			    int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;

	if (st->fw_use_new_i2c_api == 1) {
		/* User running at least fw 1.20 */
		return dib0700_i2c_xfer_new(adap, msg, num);
	} else {
		/* Use legacy calls */
		return dib0700_i2c_xfer_legacy(adap, msg, num);
	}
}

static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

struct i2c_algorithm dib0700_i2c_algo = {
	.master_xfer   = dib0700_i2c_xfer,
	.functionality = dib0700_i2c_func,
};

int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
			struct dvb_usb_device_description **desc, int *cold)
{
	s16 ret;
	u8 *b;

	b = kmalloc(16, GFP_KERNEL);
	if (!b)
		return	-ENOMEM;


	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
		REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);

	deb_info("FW GET_VERSION length: %d\n",ret);

	*cold = ret <= 0;
	deb_info("cold: %d\n", *cold);

	kfree(b);
	return 0;
}

static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
	u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
	u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return -EINTR;
	}

	st->buf[0] = REQUEST_SET_CLOCK;
	st->buf[1] = (en_pll << 7) | (pll_src << 6) |
		(pll_range << 5) | (clock_gpio3 << 4);
	st->buf[2] = (pll_prediv >> 8)  & 0xff; /* MSB */
	st->buf[3] =  pll_prediv        & 0xff; /* LSB */
	st->buf[4] = (pll_loopdiv >> 8) & 0xff; /* MSB */
	st->buf[5] =  pll_loopdiv       & 0xff; /* LSB */
	st->buf[6] = (free_div >> 8)    & 0xff; /* MSB */
	st->buf[7] =  free_div          & 0xff; /* LSB */
	st->buf[8] = (dsuScaler >> 8)   & 0xff; /* MSB */
	st->buf[9] =  dsuScaler         & 0xff; /* LSB */

	ret = dib0700_ctrl_wr(d, st->buf, 10);
	mutex_unlock(&d->usb_mutex);

	return ret;
}

int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
{
	struct dib0700_state *st = d->priv;
	u16 divider;
	int ret;

	if (scl_kHz == 0)
		return -EINVAL;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return -EINTR;
	}

	st->buf[0] = REQUEST_SET_I2C_PARAM;
	divider = (u16) (30000 / scl_kHz);
	st->buf[1] = 0;
	st->buf[2] = (u8) (divider >> 8);
	st->buf[3] = (u8) (divider & 0xff);
	divider = (u16) (72000 / scl_kHz);
	st->buf[4] = (u8) (divider >> 8);
	st->buf[5] = (u8) (divider & 0xff);
	divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */
	st->buf[6] = (u8) (divider >> 8);
	st->buf[7] = (u8) (divider & 0xff);

	deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
		(st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
		st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);

	ret = dib0700_ctrl_wr(d, st->buf, 8);
	mutex_unlock(&d->usb_mutex);

	return ret;
}


int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
{
	switch (clk_MHz) {
		case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
		default: return -EINVAL;
	}
	return 0;
}

static int dib0700_jumpram(struct usb_device *udev, u32 address)
{
	int ret = 0, actlen;
	u8 *buf;

	buf = kmalloc(8, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	buf[0] = REQUEST_JUMPRAM;
	buf[1] = 0;
	buf[2] = 0;
	buf[3] = 0;
	buf[4] = (address >> 24) & 0xff;
	buf[5] = (address >> 16) & 0xff;
	buf[6] = (address >> 8)  & 0xff;
	buf[7] =  address        & 0xff;

	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
		deb_fw("jumpram to 0x%x failed\n",address);
		goto out;
	}
	if (actlen != 8) {
		deb_fw("jumpram to 0x%x failed\n",address);
		ret = -EIO;
		goto out;
	}
out:
	kfree(buf);
	return ret;
}

int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
{
	struct hexline hx;
	int pos = 0, ret, act_len, i, adap_num;
	u8 *buf;
	u32 fw_version;

	buf = kmalloc(260, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
		deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",
				hx.addr, hx.len, hx.chk);

		buf[0] = hx.len;
		buf[1] = (hx.addr >> 8) & 0xff;
		buf[2] =  hx.addr       & 0xff;
		buf[3] = hx.type;
		memcpy(&buf[4],hx.data,hx.len);
		buf[4+hx.len] = hx.chk;

		ret = usb_bulk_msg(udev,
			usb_sndbulkpipe(udev, 0x01),
			buf,
			hx.len + 5,
			&act_len,
			1000);

		if (ret < 0) {
			err("firmware download failed at %d with %d",pos,ret);
			goto out;
		}
	}

	if (ret == 0) {
		/* start the firmware */
		if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
			info("firmware started successfully.");
			msleep(500);
		}
	} else
		ret = -EIO;

	/* the number of ts packet has to be at least 1 */
	if (nb_packet_buffer_size < 1)
		nb_packet_buffer_size = 1;

	/* get the firmware version */
	usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				  REQUEST_GET_VERSION,
				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
				  buf, 16, USB_CTRL_GET_TIMEOUT);
	fw_version = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];

	/* set the buffer size - DVB-USB is allocating URB buffers
	 * only after the firwmare download was successful */
	for (i = 0; i < dib0700_device_count; i++) {
		for (adap_num = 0; adap_num < dib0700_devices[i].num_adapters;
				adap_num++) {
			if (fw_version >= 0x10201) {
				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 188*nb_packet_buffer_size;
			} else {
				/* for fw version older than 1.20.1,
				 * the buffersize has to be n times 512 */
				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = ((188*nb_packet_buffer_size+188/2)/512)*512;
				if (dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize < 512)
					dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 512;
			}
		}
	}
out:
	kfree(buf);
	return ret;
}

int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	struct dib0700_state *st = adap->dev->priv;
	int ret;

	if ((onoff != 0) && (st->fw_version >= 0x10201)) {
		/* for firmware later than 1.20.1,
		 * the USB xfer length can be set  */
		ret = dib0700_set_usb_xfer_len(adap->dev,
			st->nb_packet_buffer_size);
		if (ret < 0) {
			deb_info("can not set the USB xfer len\n");
			return ret;
		}
	}

	mutex_lock(&adap->dev->usb_mutex);

	st->buf[0] = REQUEST_ENABLE_VIDEO;
	/* this bit gives a kind of command,
	 * rather than enabling something or not */
	st->buf[1] = (onoff << 4) | 0x00;

	if (st->disable_streaming_master_mode == 1)
		st->buf[2] = 0x00;
	else
		st->buf[2] = 0x01 << 4; /* Master mode */

	st->buf[3] = 0x00;

	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

	st->channel_state &= ~0x3;
	if ((adap->fe_adap[0].stream.props.endpoint != 2)
			&& (adap->fe_adap[0].stream.props.endpoint != 3)) {
		deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->fe_adap[0].stream.props.endpoint);
		if (onoff)
			st->channel_state |=	1 << (adap->id);
		else
			st->channel_state |=	1 << ~(adap->id);
	} else {
		if (onoff)
			st->channel_state |=	1 << (adap->fe_adap[0].stream.props.endpoint-2);
		else
			st->channel_state |=	1 << (3-adap->fe_adap[0].stream.props.endpoint);
	}

	st->buf[2] |= st->channel_state;

	deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);

	ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
	mutex_unlock(&adap->dev->usb_mutex);

	return ret;
}

int dib0700_change_protocol(struct rc_dev *rc, u64 *rc_type)
{
	struct dvb_usb_device *d = rc->priv;
	struct dib0700_state *st = d->priv;
	int new_proto, ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return -EINTR;
	}

	st->buf[0] = REQUEST_SET_RC;
	st->buf[1] = 0;
	st->buf[2] = 0;

	/* Set the IR mode */
	if (*rc_type & RC_BIT_RC5) {
		new_proto = 1;
		*rc_type = RC_BIT_RC5;
	} else if (*rc_type & RC_BIT_NEC) {
		new_proto = 0;
		*rc_type = RC_BIT_NEC;
	} else if (*rc_type & RC_BIT_RC6_MCE) {
		if (st->fw_version < 0x10200) {
			ret = -EINVAL;
			goto out;
		}
		new_proto = 2;
		*rc_type = RC_BIT_RC6_MCE;
	} else {
		ret = -EINVAL;
		goto out;
	}

	st->buf[1] = new_proto;

	ret = dib0700_ctrl_wr(d, st->buf, 3);
	if (ret < 0) {
		err("ir protocol setup failed");
		goto out;
	}

	d->props.rc.core.protocol = *rc_type;

out:
	mutex_unlock(&d->usb_mutex);
	return ret;
}

/* This is the structure of the RC response packet starting in firmware 1.20 */
struct dib0700_rc_response {
	u8 report_id;
	u8 data_state;
	union {
		struct {
			u8 system;
			u8 not_system;
			u8 data;
			u8 not_data;
		} nec;
		struct {
			u8 not_used;
			u8 system;
			u8 data;
			u8 not_data;
		} rc5;
	};
};
#define RC_MSG_SIZE_V1_20 6

static void dib0700_rc_urb_completion(struct urb *purb)
{
	struct dvb_usb_device *d = purb->context;
	struct dib0700_rc_response *poll_reply;
	enum rc_type protocol;
	u32 keycode;
	u8 toggle;

	deb_info("%s()\n", __func__);
	if (d->rc_dev == NULL) {
		/* This will occur if disable_rc_polling=1 */
		kfree(purb->transfer_buffer);
		usb_free_urb(purb);
		return;
	}

	poll_reply = purb->transfer_buffer;

	if (purb->status < 0) {
		deb_info("discontinuing polling\n");
		kfree(purb->transfer_buffer);
		usb_free_urb(purb);
		return;
	}

	if (purb->actual_length != RC_MSG_SIZE_V1_20) {
		deb_info("malformed rc msg size=%d\n", purb->actual_length);
		goto resubmit;
	}

	deb_data("IR ID = %02X state = %02X System = %02X %02X Cmd = %02X %02X (len %d)\n",
		 poll_reply->report_id, poll_reply->data_state,
		 poll_reply->nec.system, poll_reply->nec.not_system,
		 poll_reply->nec.data, poll_reply->nec.not_data,
		 purb->actual_length);

	switch (d->props.rc.core.protocol) {
	case RC_BIT_NEC:
		toggle = 0;

		/* NEC protocol sends repeat code as 0 0 0 FF */
		if (poll_reply->nec.system     == 0x00 &&
		    poll_reply->nec.not_system == 0x00 &&
		    poll_reply->nec.data       == 0x00 &&
		    poll_reply->nec.not_data   == 0xff) {
			poll_reply->data_state = 2;
			rc_repeat(d->rc_dev);
			goto resubmit;
		}

		if ((poll_reply->nec.data ^ poll_reply->nec.not_data) != 0xff) {
			deb_data("NEC32 protocol\n");
			keycode = RC_SCANCODE_NEC32(poll_reply->nec.system     << 24 |
						     poll_reply->nec.not_system << 16 |
						     poll_reply->nec.data       << 8  |
						     poll_reply->nec.not_data);
			protocol = RC_TYPE_NEC32;
		} else if ((poll_reply->nec.system ^ poll_reply->nec.not_system) != 0xff) {
			deb_data("NEC extended protocol\n");
			keycode = RC_SCANCODE_NECX(poll_reply->nec.system << 8 |
						    poll_reply->nec.not_system,
						    poll_reply->nec.data);

			protocol = RC_TYPE_NECX;
		} else {
			deb_data("NEC normal protocol\n");
			keycode = RC_SCANCODE_NEC(poll_reply->nec.system,
						   poll_reply->nec.data);
			protocol = RC_TYPE_NEC;
		}

		break;
	default:
		deb_data("RC5 protocol\n");
		protocol = RC_TYPE_RC5;
		toggle = poll_reply->report_id;
		keycode = RC_SCANCODE_RC5(poll_reply->rc5.system, poll_reply->rc5.data);

		if ((poll_reply->rc5.data ^ poll_reply->rc5.not_data) != 0xff) {
			/* Key failed integrity check */
			err("key failed integrity check: %02x %02x %02x %02x",
			    poll_reply->rc5.not_used, poll_reply->rc5.system,
			    poll_reply->rc5.data, poll_reply->rc5.not_data);
			goto resubmit;
		}

		break;
	}

	rc_keydown(d->rc_dev, protocol, keycode, toggle);

resubmit:
	/* Clean the buffer before we requeue */
	memset(purb->transfer_buffer, 0, RC_MSG_SIZE_V1_20);

	/* Requeue URB */
	usb_submit_urb(purb, GFP_ATOMIC);
}

int dib0700_rc_setup(struct dvb_usb_device *d, struct usb_interface *intf)
{
	struct dib0700_state *st = d->priv;
	struct urb *purb;
	const struct usb_endpoint_descriptor *e;
	int ret, rc_ep = 1;
	unsigned int pipe = 0;

	/* Poll-based. Don't initialize bulk mode */
	if (st->fw_version < 0x10200 || !intf)
		return 0;

	/* Starting in firmware 1.20, the RC info is provided on a bulk pipe */

	if (intf->cur_altsetting->desc.bNumEndpoints < rc_ep + 1)
		return -ENODEV;

	purb = usb_alloc_urb(0, GFP_KERNEL);
	if (purb == NULL)
		return -ENOMEM;

	purb->transfer_buffer = kzalloc(RC_MSG_SIZE_V1_20, GFP_KERNEL);
	if (purb->transfer_buffer == NULL) {
		err("rc kzalloc failed");
		usb_free_urb(purb);
		return -ENOMEM;
	}

	purb->status = -EINPROGRESS;

	/*
	 * Some devices like the Hauppauge NovaTD model 52009 use an interrupt
	 * endpoint, while others use a bulk one.
	 */
	e = &intf->cur_altsetting->endpoint[rc_ep].desc;
	if (usb_endpoint_dir_in(e)) {
		if (usb_endpoint_xfer_bulk(e)) {
			pipe = usb_rcvbulkpipe(d->udev, rc_ep);
			usb_fill_bulk_urb(purb, d->udev, pipe,
					  purb->transfer_buffer,
					  RC_MSG_SIZE_V1_20,
					  dib0700_rc_urb_completion, d);

		} else if (usb_endpoint_xfer_int(e)) {
			pipe = usb_rcvintpipe(d->udev, rc_ep);
			usb_fill_int_urb(purb, d->udev, pipe,
					  purb->transfer_buffer,
					  RC_MSG_SIZE_V1_20,
					  dib0700_rc_urb_completion, d, 1);
		}
	}

	if (!pipe) {
		err("There's no endpoint for remote controller");
		kfree(purb->transfer_buffer);
		usb_free_urb(purb);
		return 0;
	}

	ret = usb_submit_urb(purb, GFP_ATOMIC);
	if (ret) {
		err("rc submit urb failed");
		kfree(purb->transfer_buffer);
		usb_free_urb(purb);
	}

	return ret;
}

static int dib0700_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{
	int i;
	struct dvb_usb_device *dev;

	for (i = 0; i < dib0700_device_count; i++)
		if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
		    &dev, adapter_nr) == 0) {
			struct dib0700_state *st = dev->priv;
			u32 hwversion, romversion, fw_version, fwtype;

			dib0700_get_version(dev, &hwversion, &romversion,
				&fw_version, &fwtype);

			deb_info("Firmware version: %x, %d, 0x%x, %d\n",
				hwversion, romversion, fw_version, fwtype);

			st->fw_version = fw_version;
			st->nb_packet_buffer_size = (u32)nb_packet_buffer_size;

			/* Disable polling mode on newer firmwares */
			if (st->fw_version >= 0x10200)
				dev->props.rc.core.bulk_mode = true;
			else
				dev->props.rc.core.bulk_mode = false;

			dib0700_rc_setup(dev, intf);

			return 0;
		}

	return -ENODEV;
}

static struct usb_driver dib0700_driver = {
	.name       = "dvb_usb_dib0700",
	.probe      = dib0700_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table   = dib0700_usb_id_table,
};

module_usb_driver(dib0700_driver);

MODULE_FIRMWARE("dvb-usb-dib0700-1.20.fw");
MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");