// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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
 *      Driver modified by in order to work with upstream drxk driver, and
 *      tons of bugs got fixed, and converted to use dvb-usb-v2.
 */

#include "drxk.h"
#include "mt2063.h"
#include <media/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 struct drxk_config cablestar_hdci_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-technisat-cablestar-hdci-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;
        enum rc_proto proto;

        if (az6007_read(d, AZ6007_READ_IR, 0, 0, st->data, 10) < 0)
                return -EIO;

        if (st->data[1] == 0x44)
                return 0;

        if ((st->data[3] ^ st->data[4]) == 0xff) {
                if ((st->data[1] ^ st->data[2]) == 0xff) {
                        code = RC_SCANCODE_NEC(st->data[1], st->data[3]);
                        proto = RC_PROTO_NEC;
                } else {
                        code = RC_SCANCODE_NECX(st->data[1] << 8 | st->data[2],
                                                st->data[3]);
                        proto = RC_PROTO_NECX;
                }
        } else {
                code = RC_SCANCODE_NEC32(st->data[1] << 24 |
                                         st->data[2] << 16 |
                                         st->data[3] << 8  |
                                         st->data[4]);
                proto = RC_PROTO_NEC32;
        }

        rc_keydown(d->rc_dev, proto, 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_PROTO_BIT_NEC | RC_PROTO_BIT_NECX |
                                                RC_PROTO_BIT_NEC32;
        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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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_cablestar_hdci_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, &cablestar_hdci_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);
                        if (msgs[i].len < 1) {
                                ret = -EIO;
                                goto err;
                        }
                        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);
                        if (msgs[i].len < 1) {
                                ret = -EIO;
                                goto err;
                        }
                        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 const 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 dvb_usb_device_properties az6007_cablestar_hdci_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_cablestar_hdci_frontend_attach,
        .streaming_ctrl      = az6007_streaming_ctrl,
/* ditch get_rc_config as it can't work (TS35 remote, I believe it's rc5) */
        .get_rc_config       = NULL,
        .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 const 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)},
        {DVB_USB_DEVICE(USB_VID_TECHNISAT, USB_PID_TECHNISAT_USB2_CABLESTAR_HDCI,
                &az6007_cablestar_hdci_props, "Technisat CableStar Combo HD CI", RC_MAP_EMPTY)},
        {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");
MODULE_DESCRIPTION("Driver for AzureWave 6007 DVB-C/T USB2.0 and clones");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(AZ6007_FIRMWARE);