// SPDX-License-Identifier: GPL-2.0-or-later
/*
 DVB device driver for cx231xx

 Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
                Based on em28xx driver

 */

#include "cx231xx.h"
#include <linux/kernel.h>
#include <linux/slab.h>

#include <media/dvbdev.h>
#include <media/dmxdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_net.h>
#include <media/dvb_frontend.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>

#include "xc5000.h"
#include "s5h1432.h"
#include "tda18271.h"
#include "s5h1411.h"
#include "lgdt3305.h"
#include "si2165.h"
#include "si2168.h"
#include "mb86a20s.h"
#include "si2157.h"
#include "lgdt3306a.h"
#include "r820t.h"
#include "mn88473.h"

MODULE_DESCRIPTION("driver for cx231xx based DVB cards");
MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
MODULE_LICENSE("GPL");

static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages [dvb]");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define CX231XX_DVB_NUM_BUFS 5
#define CX231XX_DVB_MAX_PACKETSIZE 564
#define CX231XX_DVB_MAX_PACKETS 64
#define CX231XX_DVB_MAX_FRONTENDS 2

struct cx231xx_dvb {
        struct dvb_frontend *frontend[CX231XX_DVB_MAX_FRONTENDS];

        /* feed count management */
        struct mutex lock;
        int nfeeds;

        /* general boilerplate stuff */
        struct dvb_adapter adapter;
        struct dvb_demux demux;
        struct dmxdev dmxdev;
        struct dmx_frontend fe_hw;
        struct dmx_frontend fe_mem;
        struct dvb_net net;
        struct i2c_client *i2c_client_demod[2];
        struct i2c_client *i2c_client_tuner;
};

static struct s5h1432_config dvico_s5h1432_config = {
        .output_mode   = S5H1432_SERIAL_OUTPUT,
        .gpio          = S5H1432_GPIO_ON,
        .qam_if        = S5H1432_IF_4000,
        .vsb_if        = S5H1432_IF_4000,
        .inversion     = S5H1432_INVERSION_OFF,
        .status_mode   = S5H1432_DEMODLOCKING,
        .mpeg_timing   = S5H1432_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
};

static struct tda18271_std_map cnxt_rde253s_tda18271_std_map = {
        .dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
                      .if_lvl = 1, .rfagc_top = 0x37, },
        .dvbt_7   = { .if_freq = 4000, .agc_mode = 3, .std = 5,
                      .if_lvl = 1, .rfagc_top = 0x37, },
        .dvbt_8   = { .if_freq = 4000, .agc_mode = 3, .std = 6,
                      .if_lvl = 1, .rfagc_top = 0x37, },
};

static struct tda18271_std_map mb86a20s_tda18271_config = {
        .dvbt_6   = { .if_freq = 4000, .agc_mode = 3, .std = 4,
                      .if_lvl = 0, .rfagc_top = 0x37, },
};

static struct tda18271_config cnxt_rde253s_tunerconfig = {
        .std_map = &cnxt_rde253s_tda18271_std_map,
        .gate    = TDA18271_GATE_ANALOG,
};

static struct s5h1411_config tda18271_s5h1411_config = {
        .output_mode   = S5H1411_SERIAL_OUTPUT,
        .gpio          = S5H1411_GPIO_OFF,
        .vsb_if        = S5H1411_IF_3250,
        .qam_if        = S5H1411_IF_4000,
        .inversion     = S5H1411_INVERSION_ON,
        .status_mode   = S5H1411_DEMODLOCKING,
        .mpeg_timing   = S5H1411_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
};
static struct s5h1411_config xc5000_s5h1411_config = {
        .output_mode   = S5H1411_SERIAL_OUTPUT,
        .gpio          = S5H1411_GPIO_OFF,
        .vsb_if        = S5H1411_IF_3250,
        .qam_if        = S5H1411_IF_3250,
        .inversion     = S5H1411_INVERSION_OFF,
        .status_mode   = S5H1411_DEMODLOCKING,
        .mpeg_timing   = S5H1411_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
};

static struct lgdt3305_config hcw_lgdt3305_config = {
        .i2c_addr           = 0x0e,
        .mpeg_mode          = LGDT3305_MPEG_SERIAL,
        .tpclk_edge         = LGDT3305_TPCLK_FALLING_EDGE,
        .tpvalid_polarity   = LGDT3305_TP_VALID_HIGH,
        .deny_i2c_rptr      = 1,
        .spectral_inversion = 1,
        .qam_if_khz         = 4000,
        .vsb_if_khz         = 3250,
};

static struct tda18271_std_map hauppauge_tda18271_std_map = {
        .atsc_6   = { .if_freq = 3250, .agc_mode = 3, .std = 4,
                      .if_lvl = 1, .rfagc_top = 0x58, },
        .qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 5,
                      .if_lvl = 1, .rfagc_top = 0x58, },
};

static struct tda18271_config hcw_tda18271_config = {
        .std_map = &hauppauge_tda18271_std_map,
        .gate    = TDA18271_GATE_DIGITAL,
};

static const struct mb86a20s_config pv_mb86a20s_config = {
        .demod_address = 0x10,
        .is_serial = true,
};

static struct tda18271_config pv_tda18271_config = {
        .std_map = &mb86a20s_tda18271_config,
        .gate    = TDA18271_GATE_DIGITAL,
        .small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
};

static const struct lgdt3306a_config hauppauge_955q_lgdt3306a_config = {
        .qam_if_khz         = 4000,
        .vsb_if_khz         = 3250,
        .spectral_inversion = 1,
        .mpeg_mode          = LGDT3306A_MPEG_SERIAL,
        .tpclk_edge         = LGDT3306A_TPCLK_RISING_EDGE,
        .tpvalid_polarity   = LGDT3306A_TP_VALID_HIGH,
        .xtalMHz            = 25,
};

static struct r820t_config astrometa_t2hybrid_r820t_config = {
        .i2c_addr               = 0x3a, /* 0x74 >> 1 */
        .xtal                   = 16000000,
        .rafael_chip            = CHIP_R828D,
        .max_i2c_msg_len        = 2,
};

static inline void print_err_status(struct cx231xx *dev, int packet, int status)
{
        char *errmsg = "Unknown";

        switch (status) {
        case -ENOENT:
                errmsg = "unlinked synchronously";
                break;
        case -ECONNRESET:
                errmsg = "unlinked asynchronously";
                break;
        case -ENOSR:
                errmsg = "Buffer error (overrun)";
                break;
        case -EPIPE:
                errmsg = "Stalled (device not responding)";
                break;
        case -EOVERFLOW:
                errmsg = "Babble (bad cable?)";
                break;
        case -EPROTO:
                errmsg = "Bit-stuff error (bad cable?)";
                break;
        case -EILSEQ:
                errmsg = "CRC/Timeout (could be anything)";
                break;
        case -ETIME:
                errmsg = "Device does not respond";
                break;
        }
        if (packet < 0) {
                dev_dbg(dev->dev,
                        "URB status %d [%s].\n", status, errmsg);
        } else {
                dev_dbg(dev->dev,
                        "URB packet %d, status %d [%s].\n",
                        packet, status, errmsg);
        }
}

static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb)
{
        int i;

        if (!dev)
                return 0;

        if (dev->state & DEV_DISCONNECTED)
                return 0;

        if (urb->status < 0) {
                print_err_status(dev, -1, urb->status);
                if (urb->status == -ENOENT)
                        return 0;
        }

        for (i = 0; i < urb->number_of_packets; i++) {
                int status = urb->iso_frame_desc[i].status;

                if (status < 0) {
                        print_err_status(dev, i, status);
                        if (urb->iso_frame_desc[i].status != -EPROTO)
                                continue;
                }

                dvb_dmx_swfilter(&dev->dvb->demux,
                                 urb->transfer_buffer +
                                urb->iso_frame_desc[i].offset,
                                urb->iso_frame_desc[i].actual_length);
        }

        return 0;
}

static inline int dvb_bulk_copy(struct cx231xx *dev, struct urb *urb)
{
        if (!dev)
                return 0;

        if (dev->state & DEV_DISCONNECTED)
                return 0;

        if (urb->status < 0) {
                print_err_status(dev, -1, urb->status);
                if (urb->status == -ENOENT)
                        return 0;
        }

        /* Feed the transport payload into the kernel demux */
        dvb_dmx_swfilter(&dev->dvb->demux,
                urb->transfer_buffer, urb->actual_length);

        return 0;
}

static int start_streaming(struct cx231xx_dvb *dvb)
{
        int rc;
        struct cx231xx *dev = dvb->adapter.priv;

        if (dev->USE_ISO) {
                dev_dbg(dev->dev, "DVB transfer mode is ISO.\n");
                cx231xx_set_alt_setting(dev, INDEX_TS1, 5);
                rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
                if (rc < 0)
                        return rc;
                dev->mode_tv = 1;
                return cx231xx_init_isoc(dev, CX231XX_DVB_MAX_PACKETS,
                                        CX231XX_DVB_NUM_BUFS,
                                        dev->ts1_mode.max_pkt_size,
                                        dvb_isoc_copy);
        } else {
                dev_dbg(dev->dev, "DVB transfer mode is BULK.\n");
                cx231xx_set_alt_setting(dev, INDEX_TS1, 0);
                rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
                if (rc < 0)
                        return rc;
                dev->mode_tv = 1;
                return cx231xx_init_bulk(dev, CX231XX_DVB_MAX_PACKETS,
                                        CX231XX_DVB_NUM_BUFS,
                                        dev->ts1_mode.max_pkt_size,
                                        dvb_bulk_copy);
        }

}

static int stop_streaming(struct cx231xx_dvb *dvb)
{
        struct cx231xx *dev = dvb->adapter.priv;

        if (dev->USE_ISO)
                cx231xx_uninit_isoc(dev);
        else
                cx231xx_uninit_bulk(dev);

        cx231xx_set_mode(dev, CX231XX_SUSPEND);

        return 0;
}

static int start_feed(struct dvb_demux_feed *feed)
{
        struct dvb_demux *demux = feed->demux;
        struct cx231xx_dvb *dvb = demux->priv;
        int rc, ret;

        if (!demux->dmx.frontend)
                return -EINVAL;

        mutex_lock(&dvb->lock);
        dvb->nfeeds++;
        rc = dvb->nfeeds;

        if (dvb->nfeeds == 1) {
                ret = start_streaming(dvb);
                if (ret < 0)
                        rc = ret;
        }

        mutex_unlock(&dvb->lock);
        return rc;
}

static int stop_feed(struct dvb_demux_feed *feed)
{
        struct dvb_demux *demux = feed->demux;
        struct cx231xx_dvb *dvb = demux->priv;
        int err = 0;

        mutex_lock(&dvb->lock);
        dvb->nfeeds--;

        if (0 == dvb->nfeeds)
                err = stop_streaming(dvb);

        mutex_unlock(&dvb->lock);
        return err;
}

/* ------------------------------------------------------------------ */
static int cx231xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
        struct cx231xx *dev = fe->dvb->priv;

        if (acquire)
                return cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
        else
                return cx231xx_set_mode(dev, CX231XX_SUSPEND);
}

/* ------------------------------------------------------------------ */

static struct xc5000_config cnxt_rde250_tunerconfig = {
        .i2c_address = 0x61,
        .if_khz = 4000,
};
static struct xc5000_config cnxt_rdu250_tunerconfig = {
        .i2c_address = 0x61,
        .if_khz = 3250,
};

/* ------------------------------------------------------------------ */
#if 0
static int attach_xc5000(u8 addr, struct cx231xx *dev)
{

        struct dvb_frontend *fe;
        struct xc5000_config cfg;

        memset(&cfg, 0, sizeof(cfg));
        cfg.i2c_adap = cx231xx_get_i2c_adap(dev, dev->board.tuner_i2c_master);
        cfg.i2c_addr = addr;

        if (!dev->dvb->frontend[0]) {
                dev_err(dev->dev, "%s/2: dvb frontend not attached. Can't attach xc5000\n",
                        dev->name);
                return -EINVAL;
        }

        fe = dvb_attach(xc5000_attach, dev->dvb->frontend[0], &cfg);
        if (!fe) {
                dev_err(dev->dev, "%s/2: xc5000 attach failed\n", dev->name);
                dvb_frontend_detach(dev->dvb->frontend[0]);
                dev->dvb->frontend[0] = NULL;
                return -EINVAL;
        }

        dev_info(dev->dev, "%s/2: xc5000 attached\n", dev->name);

        return 0;
}
#endif

int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
{
        if (dev->dvb && dev->dvb->frontend[0]) {

                struct dvb_tuner_ops *dops = &dev->dvb->frontend[0]->ops.tuner_ops;

                if (dops->set_analog_params != NULL) {
                        struct analog_parameters params;

                        params.frequency = freq;
                        params.std = dev->norm;
                        params.mode = 0;        /* 0- Air; 1 - cable */
                        /*params.audmode = ;       */

                        /* Set the analog parameters to set the frequency */
                        dops->set_analog_params(dev->dvb->frontend[0], &params);
                }

        }

        return 0;
}

int cx231xx_reset_analog_tuner(struct cx231xx *dev)
{
        int status = 0;

        if (dev->dvb && dev->dvb->frontend[0]) {

                struct dvb_tuner_ops *dops = &dev->dvb->frontend[0]->ops.tuner_ops;

                if (dops->init != NULL && !dev->xc_fw_load_done) {

                        dev_dbg(dev->dev,
                                "Reloading firmware for XC5000\n");
                        status = dops->init(dev->dvb->frontend[0]);
                        if (status == 0) {
                                dev->xc_fw_load_done = 1;
                                dev_dbg(dev->dev,
                                        "XC5000 firmware download completed\n");
                        } else {
                                dev->xc_fw_load_done = 0;
                                dev_dbg(dev->dev,
                                        "XC5000 firmware download failed !!!\n");
                        }
                }

        }

        return status;
}

/* ------------------------------------------------------------------ */

static int register_dvb(struct cx231xx_dvb *dvb,
                        struct module *module,
                        struct cx231xx *dev, struct device *device)
{
        int result;

        mutex_init(&dvb->lock);


        /* register adapter */
        result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
                                      adapter_nr);
        if (result < 0) {
                dev_warn(dev->dev,
                       "%s: dvb_register_adapter failed (errno = %d)\n",
                       dev->name, result);
                goto fail_adapter;
        }
        dvb_register_media_controller(&dvb->adapter, dev->media_dev);

        /* Ensure all frontends negotiate bus access */
        dvb->frontend[0]->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;
        if (dvb->frontend[1])
                dvb->frontend[1]->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;

        dvb->adapter.priv = dev;

        /* register frontend */
        result = dvb_register_frontend(&dvb->adapter, dvb->frontend[0]);
        if (result < 0) {
                dev_warn(dev->dev,
                       "%s: dvb_register_frontend failed (errno = %d)\n",
                       dev->name, result);
                goto fail_frontend0;
        }

        if (dvb->frontend[1]) {
                result = dvb_register_frontend(&dvb->adapter, dvb->frontend[1]);
                if (result < 0) {
                        dev_warn(dev->dev,
                                 "%s: 2nd dvb_register_frontend failed (errno = %d)\n",
                                dev->name, result);
                        goto fail_frontend1;
                }

                /* MFE lock */
                dvb->adapter.mfe_shared = 1;
        }

        /* register demux stuff */
        dvb->demux.dmx.capabilities =
            DMX_TS_FILTERING | DMX_SECTION_FILTERING |
            DMX_MEMORY_BASED_FILTERING;
        dvb->demux.priv = dvb;
        dvb->demux.filternum = 256;
        dvb->demux.feednum = 256;
        dvb->demux.start_feed = start_feed;
        dvb->demux.stop_feed = stop_feed;

        result = dvb_dmx_init(&dvb->demux);
        if (result < 0) {
                dev_warn(dev->dev,
                         "%s: dvb_dmx_init failed (errno = %d)\n",
                       dev->name, result);
                goto fail_dmx;
        }

        dvb->dmxdev.filternum = 256;
        dvb->dmxdev.demux = &dvb->demux.dmx;
        dvb->dmxdev.capabilities = 0;
        result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
        if (result < 0) {
                dev_warn(dev->dev,
                         "%s: dvb_dmxdev_init failed (errno = %d)\n",
                         dev->name, result);
                goto fail_dmxdev;
        }

        dvb->fe_hw.source = DMX_FRONTEND_0;
        result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
        if (result < 0) {
                dev_warn(dev->dev,
                       "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
                       dev->name, result);
                goto fail_fe_hw;
        }

        dvb->fe_mem.source = DMX_MEMORY_FE;
        result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
        if (result < 0) {
                dev_warn(dev->dev,
                         "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
                         dev->name, result);
                goto fail_fe_mem;
        }

        result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
        if (result < 0) {
                dev_warn(dev->dev,
                         "%s: connect_frontend failed (errno = %d)\n",
                         dev->name, result);
                goto fail_fe_conn;
        }

        /* register network adapter */
        dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
        result = dvb_create_media_graph(&dvb->adapter,
                                        dev->tuner_type == TUNER_ABSENT);
        if (result < 0)
                goto fail_create_graph;

        return 0;

fail_create_graph:
        dvb_net_release(&dvb->net);
fail_fe_conn:
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
fail_fe_mem:
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
fail_fe_hw:
        dvb_dmxdev_release(&dvb->dmxdev);
fail_dmxdev:
        dvb_dmx_release(&dvb->demux);
fail_dmx:
        if (dvb->frontend[1])
                dvb_unregister_frontend(dvb->frontend[1]);
        dvb_unregister_frontend(dvb->frontend[0]);
fail_frontend1:
        if (dvb->frontend[1])
                dvb_frontend_detach(dvb->frontend[1]);
fail_frontend0:
        dvb_frontend_detach(dvb->frontend[0]);
        dvb_unregister_adapter(&dvb->adapter);
fail_adapter:
        return result;
}

static void unregister_dvb(struct cx231xx_dvb *dvb)
{
        dvb_net_release(&dvb->net);
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
        dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
        dvb_dmxdev_release(&dvb->dmxdev);
        dvb_dmx_release(&dvb->demux);
        if (dvb->frontend[1])
                dvb_unregister_frontend(dvb->frontend[1]);
        dvb_unregister_frontend(dvb->frontend[0]);
        if (dvb->frontend[1])
                dvb_frontend_detach(dvb->frontend[1]);
        dvb_frontend_detach(dvb->frontend[0]);
        dvb_unregister_adapter(&dvb->adapter);

        /* remove I2C tuner */
        dvb_module_release(dvb->i2c_client_tuner);
        dvb->i2c_client_tuner = NULL;
        /* remove I2C demod(s) */
        dvb_module_release(dvb->i2c_client_demod[1]);
        dvb->i2c_client_demod[1] = NULL;
        dvb_module_release(dvb->i2c_client_demod[0]);
        dvb->i2c_client_demod[0] = NULL;
}

static int dvb_init(struct cx231xx *dev)
{
        int result;
        struct cx231xx_dvb *dvb;
        struct i2c_adapter *tuner_i2c;
        struct i2c_adapter *demod_i2c;
        struct i2c_client *client;
        struct i2c_adapter *adapter;

        if (!dev->board.has_dvb) {
                /* This device does not support the extension */
                return 0;
        }

        dvb = kzalloc_obj(struct cx231xx_dvb);

        if (dvb == NULL) {
                dev_info(dev->dev,
                         "cx231xx_dvb: memory allocation failed\n");
                return -ENOMEM;
        }
        dev->dvb = dvb;
        dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
        dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;

        tuner_i2c = cx231xx_get_i2c_adap(dev, dev->board.tuner_i2c_master);
        demod_i2c = cx231xx_get_i2c_adap(dev, dev->board.demod_i2c_master);
        mutex_lock(&dev->lock);
        cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
        cx231xx_demod_reset(dev);
        /* init frontend */
        switch (dev->model) {
        case CX231XX_BOARD_CNXT_CARRAERA:
        case CX231XX_BOARD_CNXT_RDE_250:

                dev->dvb->frontend[0] = dvb_attach(s5h1432_attach,
                                        &dvico_s5h1432_config,
                                        demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach s5h1432 front end\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                if (!dvb_attach(xc5000_attach, dev->dvb->frontend[0],
                               tuner_i2c,
                               &cnxt_rde250_tunerconfig)) {
                        result = -EINVAL;
                        goto out_free;
                }

                break;
        case CX231XX_BOARD_CNXT_SHELBY:
        case CX231XX_BOARD_CNXT_RDU_250:

                dev->dvb->frontend[0] = dvb_attach(s5h1411_attach,
                                               &xc5000_s5h1411_config,
                                               demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach s5h1411 front end\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                if (!dvb_attach(xc5000_attach, dev->dvb->frontend[0],
                               tuner_i2c,
                               &cnxt_rdu250_tunerconfig)) {
                        result = -EINVAL;
                        goto out_free;
                }
                break;
        case CX231XX_BOARD_CNXT_RDE_253S:

                dev->dvb->frontend[0] = dvb_attach(s5h1432_attach,
                                        &dvico_s5h1432_config,
                                        demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach s5h1432 front end\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                if (!dvb_attach(tda18271_attach, dev->dvb->frontend[0],
                               dev->board.tuner_addr, tuner_i2c,
                               &cnxt_rde253s_tunerconfig)) {
                        result = -EINVAL;
                        goto out_free;
                }
                break;
        case CX231XX_BOARD_CNXT_RDU_253S:
        case CX231XX_BOARD_KWORLD_UB445_USB_HYBRID:

                dev->dvb->frontend[0] = dvb_attach(s5h1411_attach,
                                               &tda18271_s5h1411_config,
                                               demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach s5h1411 front end\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                if (!dvb_attach(tda18271_attach, dev->dvb->frontend[0],
                               dev->board.tuner_addr, tuner_i2c,
                               &cnxt_rde253s_tunerconfig)) {
                        result = -EINVAL;
                        goto out_free;
                }
                break;
        case CX231XX_BOARD_HAUPPAUGE_EXETER:

                dev_info(dev->dev,
                         "%s: looking for tuner / demod on i2c bus: %d\n",
                       __func__, i2c_adapter_id(tuner_i2c));

                dev->dvb->frontend[0] = dvb_attach(lgdt3305_attach,
                                                &hcw_lgdt3305_config,
                                                demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach LG3305 front end\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                dvb_attach(tda18271_attach, dev->dvb->frontend[0],
                           dev->board.tuner_addr, tuner_i2c,
                           &hcw_tda18271_config);
                break;

        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1113xx:
        {
                struct si2165_platform_data si2165_pdata = {};

                /* attach demod */
                si2165_pdata.fe = &dev->dvb->frontend[0];
                si2165_pdata.chip_mode = SI2165_MODE_PLL_XTAL;
                si2165_pdata.ref_freq_hz = 16000000;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2165", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &si2165_pdata);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                dev->dvb->frontend[0]->ops.i2c_gate_ctrl = NULL;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                dvb_attach(tda18271_attach, dev->dvb->frontend[0],
                        dev->board.tuner_addr, tuner_i2c,
                        &hcw_tda18271_config);

                dev->cx231xx_reset_analog_tuner = NULL;
                break;
        }
        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
        {
                struct si2165_platform_data si2165_pdata = {};
                struct si2157_config si2157_config = {};

                /* attach demod */
                si2165_pdata.fe = &dev->dvb->frontend[0];
                si2165_pdata.chip_mode = SI2165_MODE_PLL_EXT;
                si2165_pdata.ref_freq_hz = 24000000;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2165", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &si2165_pdata);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                dev->dvb->frontend[0]->ops.i2c_gate_ctrl = NULL;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                /* attach tuner */
                si2157_config.fe = dev->dvb->frontend[0];
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
                si2157_config.mdev = dev->media_dev;
#endif
                si2157_config.if_port = 1;
                si2157_config.inversion = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2157", NULL, tuner_i2c,
                                                dev->board.tuner_addr,
                                                &si2157_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dev->cx231xx_reset_analog_tuner = NULL;

                dev->dvb->i2c_client_tuner = client;
                break;
        }
        case CX231XX_BOARD_HAUPPAUGE_955Q:
        {
                struct si2157_config si2157_config = {};
                struct lgdt3306a_config lgdt3306a_config = {};

                lgdt3306a_config = hauppauge_955q_lgdt3306a_config;
                lgdt3306a_config.fe = &dev->dvb->frontend[0];
                lgdt3306a_config.i2c_adapter = &adapter;

                /* perform probe/init/attach */
                client = dvb_module_probe("lgdt3306a", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &lgdt3306a_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                dev->dvb->frontend[0]->ops.i2c_gate_ctrl = NULL;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                /* attach tuner */
                si2157_config.fe = dev->dvb->frontend[0];
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
                si2157_config.mdev = dev->media_dev;
#endif
                si2157_config.if_port = 1;
                si2157_config.inversion = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2157", NULL, tuner_i2c,
                                                dev->board.tuner_addr,
                                                &si2157_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dev->cx231xx_reset_analog_tuner = NULL;

                dev->dvb->i2c_client_tuner = client;
                break;
        }
        case CX231XX_BOARD_PV_PLAYTV_USB_HYBRID:
        case CX231XX_BOARD_KWORLD_UB430_USB_HYBRID:

                dev_info(dev->dev,
                         "%s: looking for demod on i2c bus: %d\n",
                         __func__, i2c_adapter_id(tuner_i2c));

                dev->dvb->frontend[0] = dvb_attach(mb86a20s_attach,
                                                &pv_mb86a20s_config,
                                                demod_i2c);

                if (!dev->dvb->frontend[0]) {
                        dev_err(dev->dev,
                                "Failed to attach mb86a20s demod\n");
                        result = -EINVAL;
                        goto out_free;
                }

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                dvb_attach(tda18271_attach, dev->dvb->frontend[0],
                           dev->board.tuner_addr, tuner_i2c,
                           &pv_tda18271_config);
                break;

        case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
        {
                struct si2157_config si2157_config = {};
                struct si2168_config si2168_config = {};

                /* attach demodulator chip */
                si2168_config.ts_mode = SI2168_TS_SERIAL; /* from *.inf file */
                si2168_config.fe = &dev->dvb->frontend[0];
                si2168_config.i2c_adapter = &adapter;
                si2168_config.ts_clock_inv = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2168", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &si2168_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                /* attach tuner chip */
                si2157_config.fe = dev->dvb->frontend[0];
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
                si2157_config.mdev = dev->media_dev;
#endif
                si2157_config.if_port = 1;
                si2157_config.inversion = false;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2157", NULL, tuner_i2c,
                                                dev->board.tuner_addr,
                                                &si2157_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dev->cx231xx_reset_analog_tuner = NULL;
                dev->dvb->i2c_client_tuner = client;
                break;
        }
        case CX231XX_BOARD_ASTROMETA_T2HYBRID:
        {
                struct mn88473_config mn88473_config = {};

                /* attach demodulator chip */
                mn88473_config.i2c_wr_max = 16;
                mn88473_config.xtal = 25000000;
                mn88473_config.fe = &dev->dvb->frontend[0];

                /* perform probe/init/attach */
                client = dvb_module_probe("mn88473", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &mn88473_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                /* attach tuner chip */
                dvb_attach(r820t_attach, dev->dvb->frontend[0],
                           tuner_i2c,
                           &astrometa_t2hybrid_r820t_config);
                break;
        }
        case CX231XX_BOARD_HAUPPAUGE_935C:
        {
                struct si2157_config si2157_config = {};
                struct si2168_config si2168_config = {};

                /* attach demodulator chip */
                si2168_config.ts_mode = SI2168_TS_SERIAL;
                si2168_config.fe = &dev->dvb->frontend[0];
                si2168_config.i2c_adapter = &adapter;
                si2168_config.ts_clock_inv = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2168", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &si2168_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;
                dev->dvb->frontend[0]->ops.i2c_gate_ctrl = NULL;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;

                /* attach tuner */
                si2157_config.fe = dev->dvb->frontend[0];
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
                si2157_config.mdev = dev->media_dev;
#endif
                si2157_config.if_port = 1;
                si2157_config.inversion = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2157", NULL, tuner_i2c,
                                                dev->board.tuner_addr,
                                                &si2157_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dev->cx231xx_reset_analog_tuner = NULL;
                dev->dvb->i2c_client_tuner = client;
                break;
        }
        case CX231XX_BOARD_HAUPPAUGE_975:
        {
                struct i2c_adapter *adapter2;
                struct si2157_config si2157_config = {};
                struct lgdt3306a_config lgdt3306a_config = {};
                struct si2168_config si2168_config = {};

                /* attach first demodulator chip */
                lgdt3306a_config = hauppauge_955q_lgdt3306a_config;
                lgdt3306a_config.fe = &dev->dvb->frontend[0];
                lgdt3306a_config.i2c_adapter = &adapter;

                /* perform probe/init/attach */
                client = dvb_module_probe("lgdt3306a", NULL, demod_i2c,
                                                dev->board.demod_addr,
                                                &lgdt3306a_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[0] = client;

                /* attach second demodulator chip */
                si2168_config.ts_mode = SI2168_TS_SERIAL;
                si2168_config.fe = &dev->dvb->frontend[1];
                si2168_config.i2c_adapter = &adapter2;
                si2168_config.ts_clock_inv = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2168", NULL, adapter,
                                                dev->board.demod_addr2,
                                                &si2168_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dvb->i2c_client_demod[1] = client;
                dvb->frontend[1]->id = 1;

                /* define general-purpose callback pointer */
                dvb->frontend[0]->callback = cx231xx_tuner_callback;
                dvb->frontend[1]->callback = cx231xx_tuner_callback;

                /* attach tuner */
                si2157_config.fe = dev->dvb->frontend[0];
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
                si2157_config.mdev = dev->media_dev;
#endif
                si2157_config.if_port = 1;
                si2157_config.inversion = true;

                /* perform probe/init/attach */
                client = dvb_module_probe("si2157", NULL, adapter,
                                                dev->board.tuner_addr,
                                                &si2157_config);
                if (!client) {
                        result = -ENODEV;
                        goto out_free;
                }
                dev->cx231xx_reset_analog_tuner = NULL;
                dvb->i2c_client_tuner = client;

                dvb->frontend[1]->tuner_priv = dvb->frontend[0]->tuner_priv;

                memcpy(&dvb->frontend[1]->ops.tuner_ops,
                        &dvb->frontend[0]->ops.tuner_ops,
                        sizeof(struct dvb_tuner_ops));
                break;
        }
        default:
                dev_err(dev->dev,
                        "%s/2: The frontend of your DVB/ATSC card isn't supported yet\n",
                        dev->name);
                break;
        }
        if (!dvb->frontend[0]) {
                dev_err(dev->dev,
                       "%s/2: frontend initialization failed\n", dev->name);
                result = -EINVAL;
                goto out_free;
        }

        /* register everything */
        result = register_dvb(dvb, THIS_MODULE, dev, dev->dev);

        if (result < 0)
                goto out_free;


        dev_info(dev->dev, "Successfully loaded cx231xx-dvb\n");

ret:
        cx231xx_set_mode(dev, CX231XX_SUSPEND);
        mutex_unlock(&dev->lock);
        return result;

out_free:
        /* remove I2C tuner */
        dvb_module_release(dvb->i2c_client_tuner);
        dvb->i2c_client_tuner = NULL;
        /* remove I2C demod(s) */
        dvb_module_release(dvb->i2c_client_demod[1]);
        dvb->i2c_client_demod[1] = NULL;
        dvb_module_release(dvb->i2c_client_demod[0]);
        dvb->i2c_client_demod[0] = NULL;
        kfree(dvb);
        dev->dvb = NULL;
        goto ret;
}

static int dvb_fini(struct cx231xx *dev)
{
        if (!dev->board.has_dvb) {
                /* This device does not support the extension */
                return 0;
        }

        if (dev->dvb) {
                unregister_dvb(dev->dvb);
                kfree(dev->dvb);
                dev->dvb = NULL;
        }

        return 0;
}

static struct cx231xx_ops dvb_ops = {
        .id = CX231XX_DVB,
        .name = "Cx231xx dvb Extension",
        .init = dvb_init,
        .fini = dvb_fini,
};

static int __init cx231xx_dvb_register(void)
{
        return cx231xx_register_extension(&dvb_ops);
}

static void __exit cx231xx_dvb_unregister(void)
{
        cx231xx_unregister_extension(&dvb_ops);
}

module_init(cx231xx_dvb_register);
module_exit(cx231xx_dvb_unregister);