text: /*
   * Driver for AzureWave 6007 DVB-C/T USB2.0 and clones
   *
   * Copyright (c) Henry Wang <Henry.wang@AzureWave.com>
   *
   * This driver was made publicly available by Terratec, at:
   *	http://linux.terratec.de/files/TERRATEC_H7/20110323_TERRATEC_H7_Linux.tar.gz
   * The original driver's license is GPL, as declared with MODULE_LICENSE()
   *
   * Copyright (c) 2010-2012 Mauro Carvalho Chehab <mchehab@redhat.com>
   *	Driver modified by in order to work with upstream drxk driver, and
   *	tons of bugs got fixed, and converted to use dvb-usb-v2.
   *
   * 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 under version 2 of the License.
   *
   * 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 "drxk.h"
  #include "mt2063.h"
  #include "dvb_ca_en50221.h"
  #include "dvb_usb.h"
  #include "cypress_firmware.h"
  
  #define AZ6007_FIRMWARE "dvb-usb-terratec-h7-az6007.fw"
  
  static int az6007_xfer_debug;
  module_param_named(xfer_debug, az6007_xfer_debug, int, 0644);
  MODULE_PARM_DESC(xfer_debug, "Enable xfer debug");
  
  DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  
  /* Known requests (Cypress FX2 firmware + az6007 "private" ones*/
  
  #define FX2_OED			0xb5
  #define AZ6007_READ_DATA	0xb7
  #define AZ6007_I2C_RD		0xb9
  #define AZ6007_POWER		0xbc
  #define AZ6007_I2C_WR		0xbd
  #define FX2_SCON1		0xc0
  #define AZ6007_TS_THROUGH	0xc7
  #define AZ6007_READ_IR		0xb4
  
  struct az6007_device_state {
  	struct mutex		mutex;
  	struct mutex		ca_mutex;
  	struct dvb_ca_en50221	ca;
  	unsigned		warm:1;
  	int			(*gate_ctrl) (struct dvb_frontend *, int);
  	unsigned char		data[4096];
  };
  
  static struct drxk_config terratec_h7_drxk = {
  	.adr = 0x29,
  	.parallel_ts = true,
  	.dynamic_clk = true,
  	.single_master = true,
  	.enable_merr_cfg = true,
  	.no_i2c_bridge = false,
  	.chunk_size = 64,
  	.mpeg_out_clk_strength = 0x02,
  	.qam_demod_parameter_count = 2,
  	.microcode_name = "dvb-usb-terratec-h7-drxk.fw",
  };
  
  static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
  {
  	struct az6007_device_state *st = fe_to_priv(fe);
  	struct dvb_usb_adapter *adap = fe->sec_priv;
  	int status = 0;
  
  	pr_debug("%s: %s\n", __func__, enable ? "enable" : "disable");
  
  	if (!adap || !st)
  		return -EINVAL;
  
  	if (enable)
  		status = st->gate_ctrl(fe, 1);
  	else
  		status = st->gate_ctrl(fe, 0);
  
  	return status;
  }
  
  static struct mt2063_config az6007_mt2063_config = {
  	.tuner_address = 0x60,
  	.refclock = 36125000,
  };
  
  static int __az6007_read(struct usb_device *udev, u8 req, u16 value,
  			    u16 index, u8 *b, int blen)
  {
  	int ret;
  
  	ret = usb_control_msg(udev,
  			      usb_rcvctrlpipe(udev, 0),
  			      req,
  			      USB_TYPE_VENDOR | USB_DIR_IN,
  			      value, index, b, blen, 5000);
  	if (ret < 0) {
  		pr_warn("usb read operation failed. (%d)\n", ret);
  		return -EIO;
  	}
  
  	if (az6007_xfer_debug) {
  		printk(KERN_DEBUG "az6007: IN  req: %02x, value: %04x, index: %04x\n",
  		       req, value, index);
  		print_hex_dump_bytes("az6007: payload: ",
  				     DUMP_PREFIX_NONE, b, blen);
  	}
  
  	return ret;
  }
  
  static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
  			    u16 index, u8 *b, int blen)
  {
  	struct az6007_device_state *st = d->priv;
  	int ret;
  
  	if (mutex_lock_interruptible(&st->mutex) < 0)
  		return -EAGAIN;
  
  	ret = __az6007_read(d->udev, req, value, index, b, blen);
  
  	mutex_unlock(&st->mutex);
  
  	return ret;
  }
  
  static int __az6007_write(struct usb_device *udev, u8 req, u16 value,
  			     u16 index, u8 *b, int blen)
  {
  	int ret;
  
  	if (az6007_xfer_debug) {
  		printk(KERN_DEBUG "az6007: OUT req: %02x, value: %04x, index: %04x\n",
  		       req, value, index);
  		print_hex_dump_bytes("az6007: payload: ",
  				     DUMP_PREFIX_NONE, b, blen);
  	}
  
  	if (blen > 64) {
  		pr_err("az6007: tried to write %d bytes, but I2C max size is 64 bytes\n",
  		       blen);
  		return -EOPNOTSUPP;
  	}
  
  	ret = usb_control_msg(udev,
  			      usb_sndctrlpipe(udev, 0),
  			      req,
  			      USB_TYPE_VENDOR | USB_DIR_OUT,
  			      value, index, b, blen, 5000);
  	if (ret != blen) {
  		pr_err("usb write operation failed. (%d)\n", ret);
  		return -EIO;
  	}
  
  	return 0;
  }
  
  static int az6007_write(struct dvb_usb_device *d, u8 req, u16 value,
  			    u16 index, u8 *b, int blen)
  {
  	struct az6007_device_state *st = d->priv;
  	int ret;
  
  	if (mutex_lock_interruptible(&st->mutex) < 0)
  		return -EAGAIN;
  
  	ret = __az6007_write(d->udev, req, value, index, b, blen);
  
  	mutex_unlock(&st->mutex);
  
  	return ret;
  }
  
  static int az6007_streaming_ctrl(struct dvb_frontend *fe, int onoff)
  {
  	struct dvb_usb_device *d = fe_to_d(fe);
  
  	pr_debug("%s: %s\n", __func__, onoff ? "enable" : "disable");
  
  	return az6007_write(d, 0xbc, onoff, 0, NULL, 0);
  }
  
  #if IS_ENABLED(CONFIG_RC_CORE)
  /* remote control stuff (does not work with my box) */
  static int az6007_rc_query(struct dvb_usb_device *d)
  {
  	struct az6007_device_state *st = d_to_priv(d);
  	unsigned code = 0;
  
  	az6007_read(d, AZ6007_READ_IR, 0, 0, st->data, 10);
  
  	if (st->data[1] == 0x44)
  		return 0;
  
  	if ((st->data[1] ^ st->data[2]) == 0xff)
  		code = st->data[1];
  	else
  		code = st->data[1] << 8 | st->data[2];
  
  	if ((st->data[3] ^ st->data[4]) == 0xff)
  		code = code << 8 | st->data[3];
  	else
  		code = code << 16 | st->data[3] << 8 | st->data[4];
  
  	rc_keydown(d->rc_dev, code, st->data[5]);
  
  	return 0;
  }
  
  static int az6007_get_rc_config(struct dvb_usb_device *d, struct dvb_usb_rc *rc)
  {
  	pr_debug("Getting az6007 Remote Control properties\n");
  
  	rc->allowed_protos = RC_BIT_NEC;
  	rc->query          = az6007_rc_query;
  	rc->interval       = 400;
  
  	return 0;
  }
  #else
  	#define az6007_get_rc_config NULL
  #endif
  
  static int az6007_ci_read_attribute_mem(struct dvb_ca_en50221 *ca,
  					int slot,
  					int address)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  	u8 *b;
  
  	if (slot != 0)
  		return -EINVAL;
  
  	b = kmalloc(12, GFP_KERNEL);
  	if (!b)
  		return -ENOMEM;
  
  	mutex_lock(&state->ca_mutex);
  
  	req = 0xC1;
  	value = address;
  	index = 0;
  	blen = 1;
  
  	ret = az6007_read(d, req, value, index, b, blen);
  	if (ret < 0) {
  		pr_warn("usb in operation failed. (%d)\n", ret);
  		ret = -EINVAL;
  	} else {
  		ret = b[0];
  	}
  
  	mutex_unlock(&state->ca_mutex);
  	kfree(b);
  	return ret;
  }
  
  static int az6007_ci_write_attribute_mem(struct dvb_ca_en50221 *ca,
  					 int slot,
  					 int address,
  					 u8 value)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret;
  	u8 req;
  	u16 value1;
  	u16 index;
  	int blen;
  
  	pr_debug("%s(), slot %d\n", __func__, slot);
  	if (slot != 0)
  		return -EINVAL;
  
  	mutex_lock(&state->ca_mutex);
  	req = 0xC2;
  	value1 = address;
  	index = value;
  	blen = 0;
  
  	ret = az6007_write(d, req, value1, index, NULL, blen);
  	if (ret != 0)
  		pr_warn("usb out operation failed. (%d)\n", ret);
  
  	mutex_unlock(&state->ca_mutex);
  	return ret;
  }
  
  static int az6007_ci_read_cam_control(struct dvb_ca_en50221 *ca,
  				      int slot,
  				      u8 address)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  	u8 *b;
  
  	if (slot != 0)
  		return -EINVAL;
  
  	b = kmalloc(12, GFP_KERNEL);
  	if (!b)
  		return -ENOMEM;
  
  	mutex_lock(&state->ca_mutex);
  
  	req = 0xC3;
  	value = address;
  	index = 0;
  	blen = 2;
  
  	ret = az6007_read(d, req, value, index, b, blen);
  	if (ret < 0) {
  		pr_warn("usb in operation failed. (%d)\n", ret);
  		ret = -EINVAL;
  	} else {
  		if (b[0] == 0)
  			pr_warn("Read CI IO error\n");
  
  		ret = b[1];
  		pr_debug("read cam data = %x from 0x%x\n", b[1], value);
  	}
  
  	mutex_unlock(&state->ca_mutex);
  	kfree(b);
  	return ret;
  }
  
  static int az6007_ci_write_cam_control(struct dvb_ca_en50221 *ca,
  				       int slot,
  				       u8 address,
  				       u8 value)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret;
  	u8 req;
  	u16 value1;
  	u16 index;
  	int blen;
  
  	if (slot != 0)
  		return -EINVAL;
  
  	mutex_lock(&state->ca_mutex);
  	req = 0xC4;
  	value1 = address;
  	index = value;
  	blen = 0;
  
  	ret = az6007_write(d, req, value1, index, NULL, blen);
  	if (ret != 0) {
  		pr_warn("usb out operation failed. (%d)\n", ret);
  		goto failed;
  	}
  
  failed:
  	mutex_unlock(&state->ca_mutex);
  	return ret;
  }
  
  static int CI_CamReady(struct dvb_ca_en50221 *ca, int slot)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  
  	int ret;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  	u8 *b;
  
  	b = kmalloc(12, GFP_KERNEL);
  	if (!b)
  		return -ENOMEM;
  
  	req = 0xC8;
  	value = 0;
  	index = 0;
  	blen = 1;
  
  	ret = az6007_read(d, req, value, index, b, blen);
  	if (ret < 0) {
  		pr_warn("usb in operation failed. (%d)\n", ret);
  		ret = -EIO;
  	} else{
  		ret = b[0];
  	}
  	kfree(b);
  	return ret;
  }
  
  static int az6007_ci_slot_reset(struct dvb_ca_en50221 *ca, int slot)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret, i;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  
  	mutex_lock(&state->ca_mutex);
  
  	req = 0xC6;
  	value = 1;
  	index = 0;
  	blen = 0;
  
  	ret = az6007_write(d, req, value, index, NULL, blen);
  	if (ret != 0) {
  		pr_warn("usb out operation failed. (%d)\n", ret);
  		goto failed;
  	}
  
  	msleep(500);
  	req = 0xC6;
  	value = 0;
  	index = 0;
  	blen = 0;
  
  	ret = az6007_write(d, req, value, index, NULL, blen);
  	if (ret != 0) {
  		pr_warn("usb out operation failed. (%d)\n", ret);
  		goto failed;
  	}
  
  	for (i = 0; i < 15; i++) {
  		msleep(100);
  
  		if (CI_CamReady(ca, slot)) {
  			pr_debug("CAM Ready\n");
  			break;
  		}
  	}
  	msleep(5000);
  
  failed:
  	mutex_unlock(&state->ca_mutex);
  	return ret;
  }
  
  static int az6007_ci_slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
  {
  	return 0;
  }
  
  static int az6007_ci_slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  
  	int ret;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  
  	pr_debug("%s()\n", __func__);
  	mutex_lock(&state->ca_mutex);
  	req = 0xC7;
  	value = 1;
  	index = 0;
  	blen = 0;
  
  	ret = az6007_write(d, req, value, index, NULL, blen);
  	if (ret != 0) {
  		pr_warn("usb out operation failed. (%d)\n", ret);
  		goto failed;
  	}
  
  failed:
  	mutex_unlock(&state->ca_mutex);
  	return ret;
  }
  
  static int az6007_ci_poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
  {
  	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
  	struct az6007_device_state *state = d_to_priv(d);
  	int ret;
  	u8 req;
  	u16 value;
  	u16 index;
  	int blen;
  	u8 *b;
  
  	b = kmalloc(12, GFP_KERNEL);
  	if (!b)
  		return -ENOMEM;
  	mutex_lock(&state->ca_mutex);
  
  	req = 0xC5;
  	value = 0;
  	index = 0;
  	blen = 1;
  
  	ret = az6007_read(d, req, value, index, b, blen);
  	if (ret < 0) {
  		pr_warn("usb in operation failed. (%d)\n", ret);
  		ret = -EIO;
  	} else
  		ret = 0;
  
  	if (!ret && b[0] == 1) {
  		ret = DVB_CA_EN50221_POLL_CAM_PRESENT |
  		      DVB_CA_EN50221_POLL_CAM_READY;
  	}
  
  	mutex_unlock(&state->ca_mutex);
  	kfree(b);
  	return ret;
  }
  
  
  static void az6007_ci_uninit(struct dvb_usb_device *d)
  {
  	struct az6007_device_state *state;
  
  	pr_debug("%s()\n", __func__);
  
  	if (NULL == d)
  		return;
  
  	state = d_to_priv(d);
  	if (NULL == state)
  		return;
  
  	if (NULL == state->ca.data)
  		return;
  
  	dvb_ca_en50221_release(&state->ca);
  
  	memset(&state->ca, 0, sizeof(state->ca));
  }
  
  
  static int az6007_ci_init(struct dvb_usb_adapter *adap)
  {
  	struct dvb_usb_device *d = adap_to_d(adap);
  	struct az6007_device_state *state = adap_to_priv(adap);
  	int ret;
  
  	pr_debug("%s()\n", __func__);
  
  	mutex_init(&state->ca_mutex);
  	state->ca.owner			= THIS_MODULE;
  	state->ca.read_attribute_mem	= az6007_ci_read_attribute_mem;
  	state->ca.write_attribute_mem	= az6007_ci_write_attribute_mem;
  	state->ca.read_cam_control	= az6007_ci_read_cam_control;
  	state->ca.write_cam_control	= az6007_ci_write_cam_control;
  	state->ca.slot_reset		= az6007_ci_slot_reset;
  	state->ca.slot_shutdown		= az6007_ci_slot_shutdown;
  	state->ca.slot_ts_enable	= az6007_ci_slot_ts_enable;
  	state->ca.poll_slot_status	= az6007_ci_poll_slot_status;
  	state->ca.data			= d;
  
  	ret = dvb_ca_en50221_init(&adap->dvb_adap,
  				  &state->ca,
  				  0, /* flags */
  				  1);/* n_slots */
  	if (ret != 0) {
  		pr_err("Cannot initialize CI: Error %d.\n", ret);
  		memset(&state->ca, 0, sizeof(state->ca));
  		return ret;
  	}
  
  	pr_debug("CI initialized.\n");
  
  	return 0;
  }
  
  static int az6007_read_mac_addr(struct dvb_usb_adapter *adap, u8 mac[6])
  {
  	struct dvb_usb_device *d = adap_to_d(adap);
  	struct az6007_device_state *st = adap_to_priv(adap);
  	int ret;
  
  	ret = az6007_read(d, AZ6007_READ_DATA, 6, 0, st->data, 6);
  	memcpy(mac, st->data, 6);
  
  	if (ret > 0)
  		pr_debug("%s: mac is %pM\n", __func__, mac);
  
  	return ret;
  }
  
  static int az6007_frontend_attach(struct dvb_usb_adapter *adap)
  {
  	struct az6007_device_state *st = adap_to_priv(adap);
  	struct dvb_usb_device *d = adap_to_d(adap);
  
  	pr_debug("attaching demod drxk\n");
  
  	adap->fe[0] = dvb_attach(drxk_attach, &terratec_h7_drxk,
  				 &d->i2c_adap);
  	if (!adap->fe[0])
  		return -EINVAL;
  
  	adap->fe[0]->sec_priv = adap;
  	st->gate_ctrl = adap->fe[0]->ops.i2c_gate_ctrl;
  	adap->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
  
  	az6007_ci_init(adap);
  
  	return 0;
  }
  
  static int az6007_tuner_attach(struct dvb_usb_adapter *adap)
  {
  	struct dvb_usb_device *d = adap_to_d(adap);
  
  	pr_debug("attaching tuner mt2063\n");
  
  	/* Attach mt2063 to DVB-C frontend */
  	if (adap->fe[0]->ops.i2c_gate_ctrl)
  		adap->fe[0]->ops.i2c_gate_ctrl(adap->fe[0], 1);
  	if (!dvb_attach(mt2063_attach, adap->fe[0],
  			&az6007_mt2063_config,
  			&d->i2c_adap))
  		return -EINVAL;
  
  	if (adap->fe[0]->ops.i2c_gate_ctrl)
  		adap->fe[0]->ops.i2c_gate_ctrl(adap->fe[0], 0);
  
  	return 0;
  }
  
  static int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
  {
  	struct az6007_device_state *state = d_to_priv(d);
  	int ret;
  
  	pr_debug("%s()\n", __func__);
  
  	if (!state->warm) {
  		mutex_init(&state->mutex);
  
  		ret = az6007_write(d, AZ6007_POWER, 0, 2, NULL, 0);
  		if (ret < 0)
  			return ret;
  		msleep(60);
  		ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
  		if (ret < 0)
  			return ret;
  		msleep(100);
  		ret = az6007_write(d, AZ6007_POWER, 1, 3, NULL, 0);
  		if (ret < 0)
  			return ret;
  		msleep(20);
  		ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
  		if (ret < 0)
  			return ret;
  
  		msleep(400);
  		ret = az6007_write(d, FX2_SCON1, 0, 3, NULL, 0);
  		if (ret < 0)
  			return ret;
  		msleep(150);
  		ret = az6007_write(d, FX2_SCON1, 1, 3, NULL, 0);
  		if (ret < 0)
  			return ret;
  		msleep(430);
  		ret = az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
  		if (ret < 0)
  			return ret;
  
  		state->warm = true;
  
  		return 0;
  	}
  
  	if (!onoff)
  		return 0;
  
  	az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
  	az6007_write(d, AZ6007_TS_THROUGH, 0, 0, NULL, 0);
  
  	return 0;
  }
  
  /* I2C */
  static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
  			   int num)
  {
  	struct dvb_usb_device *d = i2c_get_adapdata(adap);
  	struct az6007_device_state *st = d_to_priv(d);
  	int i, j, len;
  	int ret = 0;
  	u16 index;
  	u16 value;
  	int length;
  	u8 req, addr;
  
  	if (mutex_lock_interruptible(&st->mutex) < 0)
  		return -EAGAIN;
  
  	for (i = 0; i < num; i++) {
  		addr = msgs[i].addr << 1;
  		if (((i + 1) < num)
  		    && (msgs[i].len == 1)
  		    && ((msgs[i].flags & I2C_M_RD) != I2C_M_RD)
  		    && (msgs[i + 1].flags & I2C_M_RD)
  		    && (msgs[i].addr == msgs[i + 1].addr)) {
  			/*
  			 * A write + read xfer for the same address, where
  			 * the first xfer has just 1 byte length.
  			 * Need to join both into one operation
  			 */
  			if (az6007_xfer_debug)
  				printk(KERN_DEBUG "az6007: I2C W/R addr=0x%x len=%d/%d\n",
  				       addr, msgs[i].len, msgs[i + 1].len);
  			req = AZ6007_I2C_RD;
  			index = msgs[i].buf[0];
  			value = addr | (1 << 8);
  			length = 6 + msgs[i + 1].len;
  			len = msgs[i + 1].len;
  			ret = __az6007_read(d->udev, req, value, index,
  					    st->data, length);
  			if (ret >= len) {
  				for (j = 0; j < len; j++)
  					msgs[i + 1].buf[j] = st->data[j + 5];
  			} else
  				ret = -EIO;
  			i++;
  		} else if (!(msgs[i].flags & I2C_M_RD)) {
  			/* write bytes */
  			if (az6007_xfer_debug)
  				printk(KERN_DEBUG "az6007: I2C W addr=0x%x len=%d\n",
  				       addr, msgs[i].len);
  			req = AZ6007_I2C_WR;
  			index = msgs[i].buf[0];
  			value = addr | (1 << 8);
  			length = msgs[i].len - 1;
  			len = msgs[i].len - 1;
  			for (j = 0; j < len; j++)
  				st->data[j] = msgs[i].buf[j + 1];
  			ret =  __az6007_write(d->udev, req, value, index,
  					      st->data, length);
  		} else {
  			/* read bytes */
  			if (az6007_xfer_debug)
  				printk(KERN_DEBUG "az6007: I2C R addr=0x%x len=%d\n",
  				       addr, msgs[i].len);
  			req = AZ6007_I2C_RD;
  			index = msgs[i].buf[0];
  			value = addr;
  			length = msgs[i].len + 6;
  			len = msgs[i].len;
  			ret = __az6007_read(d->udev, req, value, index,
  					    st->data, length);
  			for (j = 0; j < len; j++)
  				msgs[i].buf[j] = st->data[j + 5];
  		}
  		if (ret < 0)
  			goto err;
  	}
  err:
  	mutex_unlock(&st->mutex);
  
  	if (ret < 0) {
  		pr_info("%s ERROR: %i\n", __func__, ret);
  		return ret;
  	}
  	return num;
  }
  
  static u32 az6007_i2c_func(struct i2c_adapter *adapter)
  {
  	return I2C_FUNC_I2C;
  }
  
  static struct i2c_algorithm az6007_i2c_algo = {
  	.master_xfer = az6007_i2c_xfer,
  	.functionality = az6007_i2c_func,
  };
  
  static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
  {
  	int ret;
  	u8 *mac;
  
  	pr_debug("Identifying az6007 state\n");
  
  	mac = kmalloc(6, GFP_ATOMIC);
  	if (!mac)
  		return -ENOMEM;
  
  	/* Try to read the mac address */
  	ret = __az6007_read(d->udev, AZ6007_READ_DATA, 6, 0, mac, 6);
  	if (ret == 6)
  		ret = WARM;
  	else
  		ret = COLD;
  
  	kfree(mac);
  
  	if (ret == COLD) {
  		__az6007_write(d->udev, 0x09, 1, 0, NULL, 0);
  		__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
  		__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
  	}
  
  	pr_debug("Device is on %s state\n",
  		 ret == WARM ? "warm" : "cold");
  	return ret;
  }
  
  static void az6007_usb_disconnect(struct usb_interface *intf)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	az6007_ci_uninit(d);
  	dvb_usbv2_disconnect(intf);
  }
  
  static int az6007_download_firmware(struct dvb_usb_device *d,
  	const struct firmware *fw)
  {
  	pr_debug("Loading az6007 firmware\n");
  
  	return cypress_load_firmware(d->udev, fw, CYPRESS_FX2);
  }
  
  /* DVB USB Driver stuff */
  static struct dvb_usb_device_properties az6007_props = {
  	.driver_name         = KBUILD_MODNAME,
  	.owner               = THIS_MODULE,
  	.firmware            = AZ6007_FIRMWARE,
  
  	.adapter_nr          = adapter_nr,
  	.size_of_priv        = sizeof(struct az6007_device_state),
  	.i2c_algo            = &az6007_i2c_algo,
  	.tuner_attach        = az6007_tuner_attach,
  	.frontend_attach     = az6007_frontend_attach,
  	.streaming_ctrl      = az6007_streaming_ctrl,
  	.get_rc_config       = az6007_get_rc_config,
  	.read_mac_address    = az6007_read_mac_addr,
  	.download_firmware   = az6007_download_firmware,
  	.identify_state	     = az6007_identify_state,
  	.power_ctrl          = az6007_power_ctrl,
  	.num_adapters        = 1,
  	.adapter             = {
  		{ .stream = DVB_USB_STREAM_BULK(0x02, 10, 4096), }
  	}
  };
  
  static struct usb_device_id az6007_usb_table[] = {
  	{DVB_USB_DEVICE(USB_VID_AZUREWAVE, USB_PID_AZUREWAVE_6007,
  		&az6007_props, "Azurewave 6007", RC_MAP_EMPTY)},
  	{DVB_USB_DEVICE(USB_VID_TERRATEC, USB_PID_TERRATEC_H7,
  		&az6007_props, "Terratec H7", RC_MAP_NEC_TERRATEC_CINERGY_XS)},
  	{DVB_USB_DEVICE(USB_VID_TERRATEC, USB_PID_TERRATEC_H7_2,
  		&az6007_props, "Terratec H7", RC_MAP_NEC_TERRATEC_CINERGY_XS)},
  	{0},
  };
  
  MODULE_DEVICE_TABLE(usb, az6007_usb_table);
  
  static int az6007_suspend(struct usb_interface *intf, pm_message_t msg)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  
  	az6007_ci_uninit(d);
  	return dvb_usbv2_suspend(intf, msg);
  }
  
  static int az6007_resume(struct usb_interface *intf)
  {
  	struct dvb_usb_device *d = usb_get_intfdata(intf);
  	struct dvb_usb_adapter *adap = &d->adapter[0];
  
  	az6007_ci_init(adap);
  	return dvb_usbv2_resume(intf);
  }
  
  /* usb specific object needed to register this driver with the usb subsystem */
  static struct usb_driver az6007_usb_driver = {
  	.name		= KBUILD_MODNAME,
  	.id_table	= az6007_usb_table,
  	.probe		= dvb_usbv2_probe,
  	.disconnect	= az6007_usb_disconnect,
  	.no_dynamic_id	= 1,
  	.soft_unbind	= 1,
  	/*
  	 * FIXME: need to implement reset_resume, likely with
  	 * dvb-usb-v2 core support
  	 */
  	.suspend	= az6007_suspend,
  	.resume		= az6007_resume,
  };
  
  module_usb_driver(az6007_usb_driver);
  
  MODULE_AUTHOR("Henry Wang <Henry.wang@AzureWave.com>");
  MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
  MODULE_DESCRIPTION("Driver for AzureWave 6007 DVB-C/T USB2.0 and clones");
  MODULE_VERSION("2.0");
  MODULE_LICENSE("GPL");
  MODULE_FIRMWARE(AZ6007_FIRMWARE);
  