// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Bt8xx based DVB adapter driver
 *
 * Copyright (C) 2002,2003 Florian Schirmer <jolt@tuxbox.org>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/i2c.h>

#include <media/dmxdev.h>
#include <media/dvbdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include "dvb-bt8xx.h"
#include "bt878.h"

static int debug;

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define dprintk(fmt, arg...) do {                               \
        if (debug)                                              \
                printk(KERN_DEBUG pr_fmt("%s: " fmt),           \
                       __func__, ##arg);                        \
} while (0)


#define IF_FREQUENCYx6 217    /* 6 * 36.16666666667MHz */

static void dvb_bt8xx_task(struct tasklet_struct *t)
{
        struct bt878 *bt = from_tasklet(bt, t, tasklet);
        struct dvb_bt8xx_card *card = dev_get_drvdata(&bt->adapter->dev);

        dprintk("%d\n", card->bt->finished_block);

        while (card->bt->last_block != card->bt->finished_block) {
                (card->bt->TS_Size ? dvb_dmx_swfilter_204 : dvb_dmx_swfilter)
                        (&card->demux,
                         &card->bt->buf_cpu[card->bt->last_block *
                                            card->bt->block_bytes],
                         card->bt->block_bytes);
                card->bt->last_block = (card->bt->last_block + 1) %
                                        card->bt->block_count;
        }
}

static int dvb_bt8xx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
        struct dvb_demux*dvbdmx = dvbdmxfeed->demux;
        struct dvb_bt8xx_card *card = dvbdmx->priv;
        int rc;

        dprintk("dvb_bt8xx: start_feed\n");

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

        mutex_lock(&card->lock);
        card->nfeeds++;
        rc = card->nfeeds;
        if (card->nfeeds == 1)
                bt878_start(card->bt, card->gpio_mode,
                            card->op_sync_orin, card->irq_err_ignore);
        mutex_unlock(&card->lock);
        return rc;
}

static int dvb_bt8xx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
        struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
        struct dvb_bt8xx_card *card = dvbdmx->priv;

        dprintk("dvb_bt8xx: stop_feed\n");

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

        mutex_lock(&card->lock);
        card->nfeeds--;
        if (card->nfeeds == 0)
                bt878_stop(card->bt);
        mutex_unlock(&card->lock);

        return 0;
}

static int is_pci_slot_eq(struct pci_dev* adev, struct pci_dev* bdev)
{
        if ((adev->subsystem_vendor == bdev->subsystem_vendor) &&
                (adev->subsystem_device == bdev->subsystem_device) &&
                (adev->bus->number == bdev->bus->number) &&
                (PCI_SLOT(adev->devfn) == PCI_SLOT(bdev->devfn)))
                return 1;
        return 0;
}

static struct bt878 *dvb_bt8xx_878_match(unsigned int bttv_nr,
                                         struct pci_dev* bttv_pci_dev)
{
        unsigned int card_nr;

        /* Hmm, n squared. Hope n is small */
        for (card_nr = 0; card_nr < bt878_num; card_nr++)
                if (is_pci_slot_eq(bt878[card_nr].dev, bttv_pci_dev))
                        return &bt878[card_nr];
        return NULL;
}

static int thomson_dtt7579_demod_init(struct dvb_frontend* fe)
{
        static u8 mt352_clock_config [] = { 0x89, 0x38, 0x38 };
        static u8 mt352_reset [] = { 0x50, 0x80 };
        static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
        static u8 mt352_agc_cfg [] = { 0x67, 0x28, 0x20 };
        static u8 mt352_gpp_ctl_cfg [] = { 0x8C, 0x33 };
        static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

        mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
        udelay(2000);
        mt352_write(fe, mt352_reset, sizeof(mt352_reset));
        mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));

        mt352_write(fe, mt352_agc_cfg, sizeof(mt352_agc_cfg));
        mt352_write(fe, mt352_gpp_ctl_cfg, sizeof(mt352_gpp_ctl_cfg));
        mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

        return 0;
}

static int thomson_dtt7579_tuner_calc_regs(struct dvb_frontend *fe, u8* pllbuf, int buf_len)
{
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        u32 div;
        unsigned char bs = 0;
        unsigned char cp = 0;

        if (buf_len < 5)
                return -EINVAL;

        div = (((c->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

        if (c->frequency < 542000000)
                cp = 0xb4;
        else if (c->frequency < 771000000)
                cp = 0xbc;
        else
                cp = 0xf4;

        if (c->frequency == 0)
                bs = 0x03;
        else if (c->frequency < 443250000)
                bs = 0x02;
        else
                bs = 0x08;

        pllbuf[0] = 0x60;
        pllbuf[1] = div >> 8;
        pllbuf[2] = div & 0xff;
        pllbuf[3] = cp;
        pllbuf[4] = bs;

        return 5;
}

static struct mt352_config thomson_dtt7579_config = {
        .demod_address = 0x0f,
        .demod_init = thomson_dtt7579_demod_init,
};

static struct zl10353_config thomson_dtt7579_zl10353_config = {
        .demod_address = 0x0f,
};

static int cx24108_tuner_set_params(struct dvb_frontend *fe)
{
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        u32 freq = c->frequency;
        int i, a, n, pump;
        u32 band, pll;
        u32 osci[]={950000,1019000,1075000,1178000,1296000,1432000,
                1576000,1718000,1856000,2036000,2150000};
        u32 bandsel[]={0,0x00020000,0x00040000,0x00100800,0x00101000,
                0x00102000,0x00104000,0x00108000,0x00110000,
                0x00120000,0x00140000};

        #define XTAL 1011100 /* Hz, really 1.0111 MHz and a /10 prescaler */
        dprintk("cx24108 debug: entering SetTunerFreq, freq=%d\n", freq);

        /* This is really the bit driving the tuner chip cx24108 */

        if (freq<950000)
                freq = 950000; /* kHz */
        else if (freq>2150000)
                freq = 2150000; /* satellite IF is 950..2150MHz */

        /* decide which VCO to use for the input frequency */
        for(i = 1; (i < ARRAY_SIZE(osci) - 1) && (osci[i] < freq); i++);
        dprintk("cx24108 debug: select vco #%d (f=%d)\n", i, freq);
        band=bandsel[i];
        /* the gain values must be set by SetSymbolrate */
        /* compute the pll divider needed, from Conexant data sheet,
           resolved for (n*32+a), remember f(vco) is f(receive) *2 or *4,
           depending on the divider bit. It is set to /4 on the 2 lowest
           bands  */
        n=((i<=2?2:1)*freq*10L)/(XTAL/100);
        a=n%32; n/=32; if(a==0) n--;
        pump=(freq<(osci[i-1]+osci[i])/2);
        pll=0xf8000000|
            ((pump?1:2)<<(14+11))|
            ((n&0x1ff)<<(5+11))|
            ((a&0x1f)<<11);
        /* everything is shifted left 11 bits to left-align the bits in the
           32bit word. Output to the tuner goes MSB-aligned, after all */
        dprintk("cx24108 debug: pump=%d, n=%d, a=%d\n", pump, n, a);
        cx24110_pll_write(fe,band);
        /* set vga and vca to their widest-band settings, as a precaution.
           SetSymbolrate might not be called to set this up */
        cx24110_pll_write(fe,0x500c0000);
        cx24110_pll_write(fe,0x83f1f800);
        cx24110_pll_write(fe,pll);
        //writereg(client,0x56,0x7f);

        return 0;
}

static int pinnsat_tuner_init(struct dvb_frontend* fe)
{
        struct dvb_bt8xx_card *card = fe->dvb->priv;

        bttv_gpio_enable(card->bttv_nr, 1, 1);  /* output */
        bttv_write_gpio(card->bttv_nr, 1, 1);   /* relay on */

        return 0;
}

static int pinnsat_tuner_sleep(struct dvb_frontend* fe)
{
        struct dvb_bt8xx_card *card = fe->dvb->priv;

        bttv_write_gpio(card->bttv_nr, 1, 0);   /* relay off */

        return 0;
}

static struct cx24110_config pctvsat_config = {
        .demod_address = 0x55,
};

static int microtune_mt7202dtf_tuner_set_params(struct dvb_frontend *fe)
{
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct dvb_bt8xx_card *card = (struct dvb_bt8xx_card *) fe->dvb->priv;
        u8 cfg, cpump, band_select;
        u8 data[4];
        u32 div;
        struct i2c_msg msg = { .addr = 0x60, .flags = 0, .buf = data, .len = sizeof(data) };

        div = (36000000 + c->frequency + 83333) / 166666;
        cfg = 0x88;

        if (c->frequency < 175000000)
                cpump = 2;
        else if (c->frequency < 390000000)
                cpump = 1;
        else if (c->frequency < 470000000)
                cpump = 2;
        else if (c->frequency < 750000000)
                cpump = 2;
        else
                cpump = 3;

        if (c->frequency < 175000000)
                band_select = 0x0e;
        else if (c->frequency < 470000000)
                band_select = 0x05;
        else
                band_select = 0x03;

        data[0] = (div >> 8) & 0x7f;
        data[1] = div & 0xff;
        data[2] = ((div >> 10) & 0x60) | cfg;
        data[3] = (cpump << 6) | band_select;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 1);
        i2c_transfer(card->i2c_adapter, &msg, 1);
        return (div * 166666 - 36000000);
}

static int microtune_mt7202dtf_request_firmware(struct dvb_frontend* fe, const struct firmware **fw, char* name)
{
        struct dvb_bt8xx_card* bt = (struct dvb_bt8xx_card*) fe->dvb->priv;

        return request_firmware(fw, name, &bt->bt->dev->dev);
}

static const struct sp887x_config microtune_mt7202dtf_config = {
        .demod_address = 0x70,
        .request_firmware = microtune_mt7202dtf_request_firmware,
};

static int advbt771_samsung_tdtc9251dh0_demod_init(struct dvb_frontend* fe)
{
        static u8 mt352_clock_config [] = { 0x89, 0x38, 0x2d };
        static u8 mt352_reset [] = { 0x50, 0x80 };
        static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
        static u8 mt352_agc_cfg [] = { 0x67, 0x10, 0x23, 0x00, 0xFF, 0xFF,
                                       0x00, 0xFF, 0x00, 0x40, 0x40 };
        static u8 mt352_av771_extra[] = { 0xB5, 0x7A };
        static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

        mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
        udelay(2000);
        mt352_write(fe, mt352_reset, sizeof(mt352_reset));
        mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));

        mt352_write(fe, mt352_agc_cfg,sizeof(mt352_agc_cfg));
        udelay(2000);
        mt352_write(fe, mt352_av771_extra,sizeof(mt352_av771_extra));
        mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

        return 0;
}

static int advbt771_samsung_tdtc9251dh0_tuner_calc_regs(struct dvb_frontend *fe, u8 *pllbuf, int buf_len)
{
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        u32 div;
        unsigned char bs = 0;
        unsigned char cp = 0;

        if (buf_len < 5) return -EINVAL;

        div = (((c->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

        if (c->frequency < 150000000)
                cp = 0xB4;
        else if (c->frequency < 173000000)
                cp = 0xBC;
        else if (c->frequency < 250000000)
                cp = 0xB4;
        else if (c->frequency < 400000000)
                cp = 0xBC;
        else if (c->frequency < 420000000)
                cp = 0xF4;
        else if (c->frequency < 470000000)
                cp = 0xFC;
        else if (c->frequency < 600000000)
                cp = 0xBC;
        else if (c->frequency < 730000000)
                cp = 0xF4;
        else
                cp = 0xFC;

        if (c->frequency < 150000000)
                bs = 0x01;
        else if (c->frequency < 173000000)
                bs = 0x01;
        else if (c->frequency < 250000000)
                bs = 0x02;
        else if (c->frequency < 400000000)
                bs = 0x02;
        else if (c->frequency < 420000000)
                bs = 0x02;
        else if (c->frequency < 470000000)
                bs = 0x02;
        else
                bs = 0x08;

        pllbuf[0] = 0x61;
        pllbuf[1] = div >> 8;
        pllbuf[2] = div & 0xff;
        pllbuf[3] = cp;
        pllbuf[4] = bs;

        return 5;
}

static struct mt352_config advbt771_samsung_tdtc9251dh0_config = {
        .demod_address = 0x0f,
        .demod_init = advbt771_samsung_tdtc9251dh0_demod_init,
};

static const struct dst_config dst_config = {
        .demod_address = 0x55,
};

static int or51211_request_firmware(struct dvb_frontend* fe, const struct firmware **fw, char* name)
{
        struct dvb_bt8xx_card* bt = (struct dvb_bt8xx_card*) fe->dvb->priv;

        return request_firmware(fw, name, &bt->bt->dev->dev);
}

static void or51211_setmode(struct dvb_frontend * fe, int mode)
{
        struct dvb_bt8xx_card *bt = fe->dvb->priv;
        bttv_write_gpio(bt->bttv_nr, 0x0002, mode);   /* Reset */
        msleep(20);
}

static void or51211_reset(struct dvb_frontend * fe)
{
        struct dvb_bt8xx_card *bt = fe->dvb->priv;

        /* RESET DEVICE
         * reset is controlled by GPIO-0
         * when set to 0 causes reset and when to 1 for normal op
         * must remain reset for 128 clock cycles on a 50Mhz clock
         * also PRM1 PRM2 & PRM4 are controlled by GPIO-1,GPIO-2 & GPIO-4
         * We assume that the reset has be held low long enough or we
         * have been reset by a power on.  When the driver is unloaded
         * reset set to 0 so if reloaded we have been reset.
         */
        /* reset & PRM1,2&4 are outputs */
        int ret = bttv_gpio_enable(bt->bttv_nr, 0x001F, 0x001F);
        if (ret != 0)
                pr_warn("or51211: Init Error - Can't Reset DVR (%i)\n", ret);
        bttv_write_gpio(bt->bttv_nr, 0x001F, 0x0000);   /* Reset */
        msleep(20);
        /* Now set for normal operation */
        bttv_write_gpio(bt->bttv_nr, 0x0001F, 0x0001);
        /* wait for operation to begin */
        msleep(500);
}

static void or51211_sleep(struct dvb_frontend * fe)
{
        struct dvb_bt8xx_card *bt = fe->dvb->priv;
        bttv_write_gpio(bt->bttv_nr, 0x0001, 0x0000);
}

static const struct or51211_config or51211_config = {
        .demod_address = 0x15,
        .request_firmware = or51211_request_firmware,
        .setmode = or51211_setmode,
        .reset = or51211_reset,
        .sleep = or51211_sleep,
};

static int vp3021_alps_tded4_tuner_set_params(struct dvb_frontend *fe)
{
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct dvb_bt8xx_card *card = (struct dvb_bt8xx_card *) fe->dvb->priv;
        u8 buf[4];
        u32 div;
        struct i2c_msg msg = { .addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf) };

        div = (c->frequency + 36166667) / 166667;

        buf[0] = (div >> 8) & 0x7F;
        buf[1] = div & 0xFF;
        buf[2] = 0x85;
        if ((c->frequency >= 47000000) && (c->frequency < 153000000))
                buf[3] = 0x01;
        else if ((c->frequency >= 153000000) && (c->frequency < 430000000))
                buf[3] = 0x02;
        else if ((c->frequency >= 430000000) && (c->frequency < 824000000))
                buf[3] = 0x0C;
        else if ((c->frequency >= 824000000) && (c->frequency < 863000000))
                buf[3] = 0x8C;
        else
                return -EINVAL;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 1);
        i2c_transfer(card->i2c_adapter, &msg, 1);
        return 0;
}

static struct nxt6000_config vp3021_alps_tded4_config = {
        .demod_address = 0x0a,
        .clock_inversion = 1,
};

static int digitv_alps_tded4_demod_init(struct dvb_frontend* fe)
{
        static u8 mt352_clock_config [] = { 0x89, 0x38, 0x2d };
        static u8 mt352_reset [] = { 0x50, 0x80 };
        static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
        static u8 mt352_agc_cfg [] = { 0x67, 0x20, 0xa0 };
        static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

        mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
        udelay(2000);
        mt352_write(fe, mt352_reset, sizeof(mt352_reset));
        mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));
        mt352_write(fe, mt352_agc_cfg,sizeof(mt352_agc_cfg));
        mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

        return 0;
}

static int digitv_alps_tded4_tuner_calc_regs(struct dvb_frontend *fe,  u8 *pllbuf, int buf_len)
{
        u32 div;
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;

        if (buf_len < 5)
                return -EINVAL;

        div = (((c->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

        pllbuf[0] = 0x61;
        pllbuf[1] = (div >> 8) & 0x7F;
        pllbuf[2] = div & 0xFF;
        pllbuf[3] = 0x85;

        dprintk("frequency %u, div %u\n", c->frequency, div);

        if (c->frequency < 470000000)
                pllbuf[4] = 0x02;
        else if (c->frequency > 823000000)
                pllbuf[4] = 0x88;
        else
                pllbuf[4] = 0x08;

        if (c->bandwidth_hz == 8000000)
                pllbuf[4] |= 0x04;

        return 5;
}

static void digitv_alps_tded4_reset(struct dvb_bt8xx_card *bt)
{
        /*
         * Reset the frontend, must be called before trying
         * to initialise the MT352 or mt352_attach
         * will fail. Same goes for the nxt6000 frontend.
         *
         */

        int ret = bttv_gpio_enable(bt->bttv_nr, 0x08, 0x08);
        if (ret != 0)
                pr_warn("digitv_alps_tded4: Init Error - Can't Reset DVR (%i)\n",
                        ret);

        /* Pulse the reset line */
        bttv_write_gpio(bt->bttv_nr, 0x08, 0x08); /* High */
        bttv_write_gpio(bt->bttv_nr, 0x08, 0x00); /* Low  */
        msleep(100);

        bttv_write_gpio(bt->bttv_nr, 0x08, 0x08); /* High */
}

static struct mt352_config digitv_alps_tded4_config = {
        .demod_address = 0x0a,
        .demod_init = digitv_alps_tded4_demod_init,
};

static struct lgdt330x_config tdvs_tua6034_config = {
        .demod_chip       = LGDT3303,
        .serial_mpeg      = 0x40, /* TPSERIAL for 3303 in TOP_CONTROL */
};

static void lgdt330x_reset(struct dvb_bt8xx_card *bt)
{
        /* Set pin 27 of the lgdt3303 chip high to reset the frontend */

        /* Pulse the reset line */
        bttv_write_gpio(bt->bttv_nr, 0x00e00007, 0x00000001); /* High */
        bttv_write_gpio(bt->bttv_nr, 0x00e00007, 0x00000000); /* Low  */
        msleep(100);

        bttv_write_gpio(bt->bttv_nr, 0x00e00007, 0x00000001); /* High */
        msleep(100);
}

static void frontend_init(struct dvb_bt8xx_card *card, u32 type)
{
        struct dst_state* state = NULL;

        switch(type) {
        case BTTV_BOARD_DVICO_DVBT_LITE:
                card->fe = dvb_attach(mt352_attach, &thomson_dtt7579_config, card->i2c_adapter);

                if (card->fe == NULL)
                        card->fe = dvb_attach(zl10353_attach, &thomson_dtt7579_zl10353_config,
                                                  card->i2c_adapter);

                if (card->fe != NULL) {
                        card->fe->ops.tuner_ops.calc_regs = thomson_dtt7579_tuner_calc_regs;
                        card->fe->ops.info.frequency_min_hz = 174 * MHz;
                        card->fe->ops.info.frequency_max_hz = 862 * MHz;
                }
                break;

        case BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE:
                lgdt330x_reset(card);
                card->fe = dvb_attach(lgdt330x_attach, &tdvs_tua6034_config,
                                      0x0e, card->i2c_adapter);
                if (card->fe != NULL) {
                        dvb_attach(simple_tuner_attach, card->fe,
                                   card->i2c_adapter, 0x61,
                                   TUNER_LG_TDVS_H06XF);
                        dprintk("dvb_bt8xx: lgdt330x detected\n");
                }
                break;

        case BTTV_BOARD_NEBULA_DIGITV:
                /*
                 * It is possible to determine the correct frontend using the I2C bus (see the Nebula SDK);
                 * this would be a cleaner solution than trying each frontend in turn.
                 */

                /* Old Nebula (marked (c)2003 on high profile pci card) has nxt6000 demod */
                digitv_alps_tded4_reset(card);
                card->fe = dvb_attach(nxt6000_attach, &vp3021_alps_tded4_config, card->i2c_adapter);
                if (card->fe != NULL) {
                        card->fe->ops.tuner_ops.set_params = vp3021_alps_tded4_tuner_set_params;
                        dprintk("dvb_bt8xx: an nxt6000 was detected on your digitv card\n");
                        break;
                }

                /* New Nebula (marked (c)2005 on low profile pci card) has mt352 demod */
                digitv_alps_tded4_reset(card);
                card->fe = dvb_attach(mt352_attach, &digitv_alps_tded4_config, card->i2c_adapter);

                if (card->fe != NULL) {
                        card->fe->ops.tuner_ops.calc_regs = digitv_alps_tded4_tuner_calc_regs;
                        dprintk("dvb_bt8xx: an mt352 was detected on your digitv card\n");
                }
                break;

        case BTTV_BOARD_AVDVBT_761:
                card->fe = dvb_attach(sp887x_attach, &microtune_mt7202dtf_config, card->i2c_adapter);
                if (card->fe) {
                        card->fe->ops.tuner_ops.set_params = microtune_mt7202dtf_tuner_set_params;
                }
                break;

        case BTTV_BOARD_AVDVBT_771:
                card->fe = dvb_attach(mt352_attach, &advbt771_samsung_tdtc9251dh0_config, card->i2c_adapter);
                if (card->fe != NULL) {
                        card->fe->ops.tuner_ops.calc_regs = advbt771_samsung_tdtc9251dh0_tuner_calc_regs;
                        card->fe->ops.info.frequency_min_hz = 174 * MHz;
                        card->fe->ops.info.frequency_max_hz = 862 * MHz;
                }
                break;

        case BTTV_BOARD_TWINHAN_DST:
                /*      DST is not a frontend driver !!!                */
                state = kmalloc(sizeof (struct dst_state), GFP_KERNEL);
                if (!state) {
                        pr_err("No memory\n");
                        break;
                }
                /*      Setup the Card                                  */
                state->config = &dst_config;
                state->i2c = card->i2c_adapter;
                state->bt = card->bt;
                state->dst_ca = NULL;
                /*      DST is not a frontend, attaching the ASIC       */
                if (dvb_attach(dst_attach, state, &card->dvb_adapter) == NULL) {
                        pr_err("%s: Could not find a Twinhan DST\n", __func__);
                        kfree(state);
                        break;
                }
                /*      Attach other DST peripherals if any             */
                /*      Conditional Access device                       */
                card->fe = &state->frontend;
                if (state->dst_hw_cap & DST_TYPE_HAS_CA)
                        dvb_attach(dst_ca_attach, state, &card->dvb_adapter);
                break;

        case BTTV_BOARD_PINNACLESAT:
                card->fe = dvb_attach(cx24110_attach, &pctvsat_config, card->i2c_adapter);
                if (card->fe) {
                        card->fe->ops.tuner_ops.init = pinnsat_tuner_init;
                        card->fe->ops.tuner_ops.sleep = pinnsat_tuner_sleep;
                        card->fe->ops.tuner_ops.set_params = cx24108_tuner_set_params;
                }
                break;

        case BTTV_BOARD_PC_HDTV:
                card->fe = dvb_attach(or51211_attach, &or51211_config, card->i2c_adapter);
                if (card->fe != NULL)
                        dvb_attach(simple_tuner_attach, card->fe,
                                   card->i2c_adapter, 0x61,
                                   TUNER_PHILIPS_FCV1236D);
                break;
        }

        if (card->fe == NULL)
                pr_err("A frontend driver was not found for device [%04x:%04x] subsystem [%04x:%04x]\n",
                       card->bt->dev->vendor,
                       card->bt->dev->device,
                       card->bt->dev->subsystem_vendor,
                       card->bt->dev->subsystem_device);
        else
                if (dvb_register_frontend(&card->dvb_adapter, card->fe)) {
                        pr_err("Frontend registration failed!\n");
                        dvb_frontend_detach(card->fe);
                        card->fe = NULL;
                }
}

static int dvb_bt8xx_load_card(struct dvb_bt8xx_card *card, u32 type)
{
        int result;

        result = dvb_register_adapter(&card->dvb_adapter, card->card_name,
                                      THIS_MODULE, &card->bt->dev->dev,
                                      adapter_nr);
        if (result < 0) {
                pr_err("dvb_register_adapter failed (errno = %d)\n", result);
                return result;
        }
        card->dvb_adapter.priv = card;

        card->bt->adapter = card->i2c_adapter;

        memset(&card->demux, 0, sizeof(struct dvb_demux));

        card->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING;

        card->demux.priv = card;
        card->demux.filternum = 256;
        card->demux.feednum = 256;
        card->demux.start_feed = dvb_bt8xx_start_feed;
        card->demux.stop_feed = dvb_bt8xx_stop_feed;
        card->demux.write_to_decoder = NULL;

        result = dvb_dmx_init(&card->demux);
        if (result < 0) {
                pr_err("dvb_dmx_init failed (errno = %d)\n", result);
                goto err_unregister_adaptor;
        }

        card->dmxdev.filternum = 256;
        card->dmxdev.demux = &card->demux.dmx;
        card->dmxdev.capabilities = 0;

        result = dvb_dmxdev_init(&card->dmxdev, &card->dvb_adapter);
        if (result < 0) {
                pr_err("dvb_dmxdev_init failed (errno = %d)\n", result);
                goto err_dmx_release;
        }

        card->fe_hw.source = DMX_FRONTEND_0;

        result = card->demux.dmx.add_frontend(&card->demux.dmx, &card->fe_hw);
        if (result < 0) {
                pr_err("dvb_dmx_init failed (errno = %d)\n", result);
                goto err_dmxdev_release;
        }

        card->fe_mem.source = DMX_MEMORY_FE;

        result = card->demux.dmx.add_frontend(&card->demux.dmx, &card->fe_mem);
        if (result < 0) {
                pr_err("dvb_dmx_init failed (errno = %d)\n", result);
                goto err_remove_hw_frontend;
        }

        result = card->demux.dmx.connect_frontend(&card->demux.dmx, &card->fe_hw);
        if (result < 0) {
                pr_err("dvb_dmx_init failed (errno = %d)\n", result);
                goto err_remove_mem_frontend;
        }

        result = dvb_net_init(&card->dvb_adapter, &card->dvbnet, &card->demux.dmx);
        if (result < 0) {
                pr_err("dvb_net_init failed (errno = %d)\n", result);
                goto err_disconnect_frontend;
        }

        tasklet_setup(&card->bt->tasklet, dvb_bt8xx_task);

        frontend_init(card, type);

        return 0;

err_disconnect_frontend:
        card->demux.dmx.disconnect_frontend(&card->demux.dmx);
err_remove_mem_frontend:
        card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_mem);
err_remove_hw_frontend:
        card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
err_dmxdev_release:
        dvb_dmxdev_release(&card->dmxdev);
err_dmx_release:
        dvb_dmx_release(&card->demux);
err_unregister_adaptor:
        dvb_unregister_adapter(&card->dvb_adapter);
        return result;
}

static int dvb_bt8xx_probe(struct bttv_sub_device *sub)
{
        struct dvb_bt8xx_card *card;
        struct pci_dev* bttv_pci_dev;
        int ret;

        if (!(card = kzalloc(sizeof(struct dvb_bt8xx_card), GFP_KERNEL)))
                return -ENOMEM;

        mutex_init(&card->lock);
        card->bttv_nr = sub->core->nr;
        strscpy(card->card_name, sub->core->v4l2_dev.name,
                sizeof(card->card_name));
        card->i2c_adapter = &sub->core->i2c_adap;

        switch(sub->core->type) {
        case BTTV_BOARD_PINNACLESAT:
                card->gpio_mode = 0x0400c060;
                /* should be: BT878_A_GAIN=0,BT878_A_PWRDN,BT878_DA_DPM,BT878_DA_SBR,
                              BT878_DA_IOM=1,BT878_DA_APP to enable serial highspeed mode. */
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                break;

        case BTTV_BOARD_DVICO_DVBT_LITE:
                card->gpio_mode = 0x0400C060;
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                /* 26, 15, 14, 6, 5
                 * A_PWRDN  DA_DPM DA_SBR DA_IOM_DA
                 * DA_APP(parallel) */
                break;

        case BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE:
                card->gpio_mode = 0x0400c060;
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                break;

        case BTTV_BOARD_NEBULA_DIGITV:
        case BTTV_BOARD_AVDVBT_761:
                card->gpio_mode = (1 << 26) | (1 << 14) | (1 << 5);
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                /* A_PWRDN DA_SBR DA_APP (high speed serial) */
                break;

        case BTTV_BOARD_AVDVBT_771: //case 0x07711461:
                card->gpio_mode = 0x0400402B;
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                /* A_PWRDN DA_SBR  DA_APP[0] PKTP=10 RISC_ENABLE FIFO_ENABLE*/
                break;

        case BTTV_BOARD_TWINHAN_DST:
                card->gpio_mode = 0x2204f2c;
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_APABORT | BT878_ARIPERR |
                                       BT878_APPERR | BT878_AFBUS;
                /* 25,21,14,11,10,9,8,3,2 then
                 * 0x33 = 5,4,1,0
                 * A_SEL=SML, DA_MLB, DA_SBR,
                 * DA_SDR=f, fifo trigger = 32 DWORDS
                 * IOM = 0 == audio A/D
                 * DPM = 0 == digital audio mode
                 * == async data parallel port
                 * then 0x33 (13 is set by start_capture)
                 * DA_APP = async data parallel port,
                 * ACAP_EN = 1,
                 * RISC+FIFO ENABLE */
                break;

        case BTTV_BOARD_PC_HDTV:
                card->gpio_mode = 0x0100EC7B;
                card->op_sync_orin = BT878_RISC_SYNC_MASK;
                card->irq_err_ignore = BT878_AFBUS | BT878_AFDSR;
                break;

        default:
                pr_err("Unknown bttv card type: %d\n", sub->core->type);
                kfree(card);
                return -ENODEV;
        }

        dprintk("dvb_bt8xx: identified card%d as %s\n", card->bttv_nr, card->card_name);

        if (!(bttv_pci_dev = bttv_get_pcidev(card->bttv_nr))) {
                pr_err("no pci device for card %d\n", card->bttv_nr);
                kfree(card);
                return -ENODEV;
        }

        if (!(card->bt = dvb_bt8xx_878_match(card->bttv_nr, bttv_pci_dev))) {
                pr_err("unable to determine DMA core of card %d,\n", card->bttv_nr);
                pr_err("if you have the ALSA bt87x audio driver installed, try removing it.\n");

                kfree(card);
                return -ENODEV;
        }

        mutex_init(&card->bt->gpio_lock);
        card->bt->bttv_nr = sub->core->nr;

        if ( (ret = dvb_bt8xx_load_card(card, sub->core->type)) ) {
                kfree(card);
                return ret;
        }

        dev_set_drvdata(&sub->dev, card);
        return 0;
}

static void dvb_bt8xx_remove(struct bttv_sub_device *sub)
{
        struct dvb_bt8xx_card *card = dev_get_drvdata(&sub->dev);

        dprintk("dvb_bt8xx: unloading card%d\n", card->bttv_nr);

        bt878_stop(card->bt);
        tasklet_kill(&card->bt->tasklet);
        dvb_net_release(&card->dvbnet);
        card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_mem);
        card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
        dvb_dmxdev_release(&card->dmxdev);
        dvb_dmx_release(&card->demux);
        if (card->fe) {
                dvb_unregister_frontend(card->fe);
                dvb_frontend_detach(card->fe);
        }
        dvb_unregister_adapter(&card->dvb_adapter);

        kfree(card);
}

static struct bttv_sub_driver driver = {
        .drv = {
                .name           = "dvb-bt8xx",
        },
        .probe          = dvb_bt8xx_probe,
        .remove         = dvb_bt8xx_remove,
        /* FIXME:
         * .shutdown    = dvb_bt8xx_shutdown,
         * .suspend     = dvb_bt8xx_suspend,
         * .resume      = dvb_bt8xx_resume,
         */
};

static int __init dvb_bt8xx_init(void)
{
        return bttv_sub_register(&driver, "dvb");
}

static void __exit dvb_bt8xx_exit(void)
{
        bttv_sub_unregister(&driver);
}

module_init(dvb_bt8xx_init);
module_exit(dvb_bt8xx_exit);

MODULE_DESCRIPTION("Bt8xx based DVB adapter driver");
MODULE_AUTHOR("Florian Schirmer <jolt@tuxbox.org>");
MODULE_LICENSE("GPL");