root/drivers/media/usb/dvb-usb/az6027.c
// SPDX-License-Identifier: GPL-2.0-only
/* DVB USB compliant Linux driver for the AZUREWAVE DVB-S/S2 USB2.0 (AZ6027)
 * receiver.
 *
 * Copyright (C) 2009 Adams.Xu <adams.xu@azwave.com.cn>
 *
 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
 */
#include "az6027.h"

#include "stb0899_drv.h"
#include "stb0899_reg.h"
#include "stb0899_cfg.h"

#include "stb6100.h"
#include "stb6100_cfg.h"
#include <media/dvb_ca_en50221.h>

int dvb_usb_az6027_debug;
module_param_named(debug, dvb_usb_az6027_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))." DVB_USB_DEBUG_STATUS);

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

struct az6027_device_state {
        struct dvb_ca_en50221 ca;
        struct mutex ca_mutex;
        u8 power_state;
};

static const struct stb0899_s1_reg az6027_stb0899_s1_init_1[] = {

        /* 0x0000000b, SYSREG */
        { STB0899_DEV_ID                , 0x30 },
        { STB0899_DISCNTRL1             , 0x32 },
        { STB0899_DISCNTRL2             , 0x80 },
        { STB0899_DISRX_ST0             , 0x04 },
        { STB0899_DISRX_ST1             , 0x00 },
        { STB0899_DISPARITY             , 0x00 },
        { STB0899_DISSTATUS             , 0x20 },
        { STB0899_DISF22                , 0x99 },
        { STB0899_DISF22RX              , 0xa8 },
        /* SYSREG ? */
        { STB0899_ACRPRESC              , 0x11 },
        { STB0899_ACRDIV1               , 0x0a },
        { STB0899_ACRDIV2               , 0x05 },
        { STB0899_DACR1                 , 0x00 },
        { STB0899_DACR2                 , 0x00 },
        { STB0899_OUTCFG                , 0x00 },
        { STB0899_MODECFG               , 0x00 },
        { STB0899_IRQSTATUS_3           , 0xfe },
        { STB0899_IRQSTATUS_2           , 0x03 },
        { STB0899_IRQSTATUS_1           , 0x7c },
        { STB0899_IRQSTATUS_0           , 0xf4 },
        { STB0899_IRQMSK_3              , 0xf3 },
        { STB0899_IRQMSK_2              , 0xfc },
        { STB0899_IRQMSK_1              , 0xff },
        { STB0899_IRQMSK_0              , 0xff },
        { STB0899_IRQCFG                , 0x00 },
        { STB0899_I2CCFG                , 0x88 },
        { STB0899_I2CRPT                , 0x58 },
        { STB0899_IOPVALUE5             , 0x00 },
        { STB0899_IOPVALUE4             , 0x33 },
        { STB0899_IOPVALUE3             , 0x6d },
        { STB0899_IOPVALUE2             , 0x90 },
        { STB0899_IOPVALUE1             , 0x60 },
        { STB0899_IOPVALUE0             , 0x00 },
        { STB0899_GPIO00CFG             , 0x82 },
        { STB0899_GPIO01CFG             , 0x82 },
        { STB0899_GPIO02CFG             , 0x82 },
        { STB0899_GPIO03CFG             , 0x82 },
        { STB0899_GPIO04CFG             , 0x82 },
        { STB0899_GPIO05CFG             , 0x82 },
        { STB0899_GPIO06CFG             , 0x82 },
        { STB0899_GPIO07CFG             , 0x82 },
        { STB0899_GPIO08CFG             , 0x82 },
        { STB0899_GPIO09CFG             , 0x82 },
        { STB0899_GPIO10CFG             , 0x82 },
        { STB0899_GPIO11CFG             , 0x82 },
        { STB0899_GPIO12CFG             , 0x82 },
        { STB0899_GPIO13CFG             , 0x82 },
        { STB0899_GPIO14CFG             , 0x82 },
        { STB0899_GPIO15CFG             , 0x82 },
        { STB0899_GPIO16CFG             , 0x82 },
        { STB0899_GPIO17CFG             , 0x82 },
        { STB0899_GPIO18CFG             , 0x82 },
        { STB0899_GPIO19CFG             , 0x82 },
        { STB0899_GPIO20CFG             , 0x82 },
        { STB0899_SDATCFG               , 0xb8 },
        { STB0899_SCLTCFG               , 0xba },
        { STB0899_AGCRFCFG              , 0x1c }, /* 0x11 */
        { STB0899_GPIO22                , 0x82 }, /* AGCBB2CFG */
        { STB0899_GPIO21                , 0x91 }, /* AGCBB1CFG */
        { STB0899_DIRCLKCFG             , 0x82 },
        { STB0899_CLKOUT27CFG           , 0x7e },
        { STB0899_STDBYCFG              , 0x82 },
        { STB0899_CS0CFG                , 0x82 },
        { STB0899_CS1CFG                , 0x82 },
        { STB0899_DISEQCOCFG            , 0x20 },
        { STB0899_GPIO32CFG             , 0x82 },
        { STB0899_GPIO33CFG             , 0x82 },
        { STB0899_GPIO34CFG             , 0x82 },
        { STB0899_GPIO35CFG             , 0x82 },
        { STB0899_GPIO36CFG             , 0x82 },
        { STB0899_GPIO37CFG             , 0x82 },
        { STB0899_GPIO38CFG             , 0x82 },
        { STB0899_GPIO39CFG             , 0x82 },
        { STB0899_NCOARSE               , 0x17 }, /* 0x15 = 27 Mhz Clock, F/3 = 198MHz, F/6 = 99MHz */
        { STB0899_SYNTCTRL              , 0x02 }, /* 0x00 = CLK from CLKI, 0x02 = CLK from XTALI */
        { STB0899_FILTCTRL              , 0x00 },
        { STB0899_SYSCTRL               , 0x01 },
        { STB0899_STOPCLK1              , 0x20 },
        { STB0899_STOPCLK2              , 0x00 },
        { STB0899_INTBUFSTATUS          , 0x00 },
        { STB0899_INTBUFCTRL            , 0x0a },
        { 0xffff                        , 0xff },
};

static const struct stb0899_s1_reg az6027_stb0899_s1_init_3[] = {
        { STB0899_DEMOD                 , 0x00 },
        { STB0899_RCOMPC                , 0xc9 },
        { STB0899_AGC1CN                , 0x01 },
        { STB0899_AGC1REF               , 0x10 },
        { STB0899_RTC                   , 0x23 },
        { STB0899_TMGCFG                , 0x4e },
        { STB0899_AGC2REF               , 0x34 },
        { STB0899_TLSR                  , 0x84 },
        { STB0899_CFD                   , 0xf7 },
        { STB0899_ACLC                  , 0x87 },
        { STB0899_BCLC                  , 0x94 },
        { STB0899_EQON                  , 0x41 },
        { STB0899_LDT                   , 0xf1 },
        { STB0899_LDT2                  , 0xe3 },
        { STB0899_EQUALREF              , 0xb4 },
        { STB0899_TMGRAMP               , 0x10 },
        { STB0899_TMGTHD                , 0x30 },
        { STB0899_IDCCOMP               , 0xfd },
        { STB0899_QDCCOMP               , 0xff },
        { STB0899_POWERI                , 0x0c },
        { STB0899_POWERQ                , 0x0f },
        { STB0899_RCOMP                 , 0x6c },
        { STB0899_AGCIQIN               , 0x80 },
        { STB0899_AGC2I1                , 0x06 },
        { STB0899_AGC2I2                , 0x00 },
        { STB0899_TLIR                  , 0x30 },
        { STB0899_RTF                   , 0x7f },
        { STB0899_DSTATUS               , 0x00 },
        { STB0899_LDI                   , 0xbc },
        { STB0899_CFRM                  , 0xea },
        { STB0899_CFRL                  , 0x31 },
        { STB0899_NIRM                  , 0x2b },
        { STB0899_NIRL                  , 0x80 },
        { STB0899_ISYMB                 , 0x1d },
        { STB0899_QSYMB                 , 0xa6 },
        { STB0899_SFRH                  , 0x2f },
        { STB0899_SFRM                  , 0x68 },
        { STB0899_SFRL                  , 0x40 },
        { STB0899_SFRUPH                , 0x2f },
        { STB0899_SFRUPM                , 0x68 },
        { STB0899_SFRUPL                , 0x40 },
        { STB0899_EQUAI1                , 0x02 },
        { STB0899_EQUAQ1                , 0xff },
        { STB0899_EQUAI2                , 0x04 },
        { STB0899_EQUAQ2                , 0x05 },
        { STB0899_EQUAI3                , 0x02 },
        { STB0899_EQUAQ3                , 0xfd },
        { STB0899_EQUAI4                , 0x03 },
        { STB0899_EQUAQ4                , 0x07 },
        { STB0899_EQUAI5                , 0x08 },
        { STB0899_EQUAQ5                , 0xf5 },
        { STB0899_DSTATUS2              , 0x00 },
        { STB0899_VSTATUS               , 0x00 },
        { STB0899_VERROR                , 0x86 },
        { STB0899_IQSWAP                , 0x2a },
        { STB0899_ECNT1M                , 0x00 },
        { STB0899_ECNT1L                , 0x00 },
        { STB0899_ECNT2M                , 0x00 },
        { STB0899_ECNT2L                , 0x00 },
        { STB0899_ECNT3M                , 0x0a },
        { STB0899_ECNT3L                , 0xad },
        { STB0899_FECAUTO1              , 0x06 },
        { STB0899_FECM                  , 0x01 },
        { STB0899_VTH12                 , 0xb0 },
        { STB0899_VTH23                 , 0x7a },
        { STB0899_VTH34                 , 0x58 },
        { STB0899_VTH56                 , 0x38 },
        { STB0899_VTH67                 , 0x34 },
        { STB0899_VTH78                 , 0x24 },
        { STB0899_PRVIT                 , 0xff },
        { STB0899_VITSYNC               , 0x19 },
        { STB0899_RSULC                 , 0xb1 }, /* DVB = 0xb1, DSS = 0xa1 */
        { STB0899_TSULC                 , 0x42 },
        { STB0899_RSLLC                 , 0x41 },
        { STB0899_TSLPL                 , 0x12 },
        { STB0899_TSCFGH                , 0x0c },
        { STB0899_TSCFGM                , 0x00 },
        { STB0899_TSCFGL                , 0x00 },
        { STB0899_TSOUT                 , 0x69 }, /* 0x0d for CAM */
        { STB0899_RSSYNCDEL             , 0x00 },
        { STB0899_TSINHDELH             , 0x02 },
        { STB0899_TSINHDELM             , 0x00 },
        { STB0899_TSINHDELL             , 0x00 },
        { STB0899_TSLLSTKM              , 0x1b },
        { STB0899_TSLLSTKL              , 0xb3 },
        { STB0899_TSULSTKM              , 0x00 },
        { STB0899_TSULSTKL              , 0x00 },
        { STB0899_PCKLENUL              , 0xbc },
        { STB0899_PCKLENLL              , 0xcc },
        { STB0899_RSPCKLEN              , 0xbd },
        { STB0899_TSSTATUS              , 0x90 },
        { STB0899_ERRCTRL1              , 0xb6 },
        { STB0899_ERRCTRL2              , 0x95 },
        { STB0899_ERRCTRL3              , 0x8d },
        { STB0899_DMONMSK1              , 0x27 },
        { STB0899_DMONMSK0              , 0x03 },
        { STB0899_DEMAPVIT              , 0x5c },
        { STB0899_PLPARM                , 0x19 },
        { STB0899_PDELCTRL              , 0x48 },
        { STB0899_PDELCTRL2             , 0x00 },
        { STB0899_BBHCTRL1              , 0x00 },
        { STB0899_BBHCTRL2              , 0x00 },
        { STB0899_HYSTTHRESH            , 0x77 },
        { STB0899_MATCSTM               , 0x00 },
        { STB0899_MATCSTL               , 0x00 },
        { STB0899_UPLCSTM               , 0x00 },
        { STB0899_UPLCSTL               , 0x00 },
        { STB0899_DFLCSTM               , 0x00 },
        { STB0899_DFLCSTL               , 0x00 },
        { STB0899_SYNCCST               , 0x00 },
        { STB0899_SYNCDCSTM             , 0x00 },
        { STB0899_SYNCDCSTL             , 0x00 },
        { STB0899_ISI_ENTRY             , 0x00 },
        { STB0899_ISI_BIT_EN            , 0x00 },
        { STB0899_MATSTRM               , 0xf0 },
        { STB0899_MATSTRL               , 0x02 },
        { STB0899_UPLSTRM               , 0x45 },
        { STB0899_UPLSTRL               , 0x60 },
        { STB0899_DFLSTRM               , 0xe3 },
        { STB0899_DFLSTRL               , 0x00 },
        { STB0899_SYNCSTR               , 0x47 },
        { STB0899_SYNCDSTRM             , 0x05 },
        { STB0899_SYNCDSTRL             , 0x18 },
        { STB0899_CFGPDELSTATUS1        , 0x19 },
        { STB0899_CFGPDELSTATUS2        , 0x2b },
        { STB0899_BBFERRORM             , 0x00 },
        { STB0899_BBFERRORL             , 0x01 },
        { STB0899_UPKTERRORM            , 0x00 },
        { STB0899_UPKTERRORL            , 0x00 },
        { 0xffff                        , 0xff },
};



static struct stb0899_config az6027_stb0899_config = {
        .init_dev               = az6027_stb0899_s1_init_1,
        .init_s2_demod          = stb0899_s2_init_2,
        .init_s1_demod          = az6027_stb0899_s1_init_3,
        .init_s2_fec            = stb0899_s2_init_4,
        .init_tst               = stb0899_s1_init_5,

        .demod_address          = 0xd0, /* 0x68, 0xd0 >> 1 */

        .xtal_freq              = 27000000,
        .inversion              = IQ_SWAP_ON,

        .lo_clk                 = 76500000,
        .hi_clk                 = 99000000,

        .esno_ave               = STB0899_DVBS2_ESNO_AVE,
        .esno_quant             = STB0899_DVBS2_ESNO_QUANT,
        .avframes_coarse        = STB0899_DVBS2_AVFRAMES_COARSE,
        .avframes_fine          = STB0899_DVBS2_AVFRAMES_FINE,
        .miss_threshold         = STB0899_DVBS2_MISS_THRESHOLD,
        .uwp_threshold_acq      = STB0899_DVBS2_UWP_THRESHOLD_ACQ,
        .uwp_threshold_track    = STB0899_DVBS2_UWP_THRESHOLD_TRACK,
        .uwp_threshold_sof      = STB0899_DVBS2_UWP_THRESHOLD_SOF,
        .sof_search_timeout     = STB0899_DVBS2_SOF_SEARCH_TIMEOUT,

        .btr_nco_bits           = STB0899_DVBS2_BTR_NCO_BITS,
        .btr_gain_shift_offset  = STB0899_DVBS2_BTR_GAIN_SHIFT_OFFSET,
        .crl_nco_bits           = STB0899_DVBS2_CRL_NCO_BITS,
        .ldpc_max_iter          = STB0899_DVBS2_LDPC_MAX_ITER,

        .tuner_get_frequency    = stb6100_get_frequency,
        .tuner_set_frequency    = stb6100_set_frequency,
        .tuner_set_bandwidth    = stb6100_set_bandwidth,
        .tuner_get_bandwidth    = stb6100_get_bandwidth,
        .tuner_set_rfsiggain    = NULL,
};

static struct stb6100_config az6027_stb6100_config = {
        .tuner_address  = 0xc0,
        .refclock       = 27000000,
};


/* check for mutex FIXME */
static int az6027_usb_in_op(struct dvb_usb_device *d, u8 req,
                            u16 value, u16 index, u8 *b, int blen)
{
        int ret = -1;
        if (mutex_lock_interruptible(&d->usb_mutex))
                return -EAGAIN;

        ret = usb_control_msg(d->udev,
                              usb_rcvctrlpipe(d->udev, 0),
                              req,
                              USB_TYPE_VENDOR | USB_DIR_IN,
                              value,
                              index,
                              b,
                              blen,
                              2000);

        if (ret < 0) {
                warn("usb in operation failed. (%d)", ret);
                ret = -EIO;
        } else
                ret = 0;

        deb_xfer("in: req. %02x, val: %04x, ind: %04x, buffer: ", req, value, index);
        debug_dump(b, blen, deb_xfer);

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

static int az6027_usb_out_op(struct dvb_usb_device *d,
                             u8 req,
                             u16 value,
                             u16 index,
                             u8 *b,
                             int blen)
{
        int ret;

        deb_xfer("out: req. %02x, val: %04x, ind: %04x, buffer: ", req, value, index);
        debug_dump(b, blen, deb_xfer);

        if (mutex_lock_interruptible(&d->usb_mutex))
                return -EAGAIN;

        ret = usb_control_msg(d->udev,
                              usb_sndctrlpipe(d->udev, 0),
                              req,
                              USB_TYPE_VENDOR | USB_DIR_OUT,
                              value,
                              index,
                              b,
                              blen,
                              2000);

        if (ret != blen) {
                warn("usb out operation failed. (%d)", ret);
                mutex_unlock(&d->usb_mutex);
                return -EIO;
        } else{
                mutex_unlock(&d->usb_mutex);
                return 0;
        }
}

static int az6027_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
        int ret;
        u8 req;
        u16 value;
        u16 index;
        int blen;

        deb_info("%s %d", __func__, onoff);

        req = 0xBC;
        value = onoff;
        index = 0;
        blen = 0;

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                warn("usb out operation failed. (%d)", ret);

        return ret;
}

/* keys for the enclosed remote control */
static struct rc_map_table rc_map_az6027_table[] = {
        { 0x01, KEY_1 },
        { 0x02, KEY_2 },
};

/* remote control stuff (does not work with my box) */
static int az6027_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
{
        *state = REMOTE_NO_KEY_PRESSED;
        return 0;
}

/*
int az6027_power_ctrl(struct dvb_usb_device *d, int onoff)
{
        u8 v = onoff;
        return az6027_usb_out_op(d,0xBC,v,3,NULL,1);
}
*/

static int az6027_ci_read_attribute_mem(struct dvb_ca_en50221 *ca,
                                        int slot,
                                        int address)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        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 = az6027_usb_in_op(d, req, value, index, b, blen);
        if (ret < 0) {
                warn("usb in operation failed. (%d)", ret);
                ret = -EINVAL;
        } else {
                ret = b[0];
        }

        mutex_unlock(&state->ca_mutex);
        kfree(b);
        return ret;
}

static int az6027_ci_write_attribute_mem(struct dvb_ca_en50221 *ca,
                                         int slot,
                                         int address,
                                         u8 value)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        int ret;
        u8 req;
        u16 value1;
        u16 index;
        int blen;

        deb_info("%s %d", __func__, slot);
        if (slot != 0)
                return -EINVAL;

        mutex_lock(&state->ca_mutex);
        req = 0xC2;
        value1 = address;
        index = value;
        blen = 0;

        ret = az6027_usb_out_op(d, req, value1, index, NULL, blen);
        if (ret != 0)
                warn("usb out operation failed. (%d)", ret);

        mutex_unlock(&state->ca_mutex);
        return ret;
}

static int az6027_ci_read_cam_control(struct dvb_ca_en50221 *ca,
                                      int slot,
                                      u8 address)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        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 = az6027_usb_in_op(d, req, value, index, b, blen);
        if (ret < 0) {
                warn("usb in operation failed. (%d)", ret);
                ret = -EINVAL;
        } else {
                if (b[0] == 0)
                        warn("Read CI IO error");

                ret = b[1];
                deb_info("read cam data = %x from 0x%x", b[1], value);
        }

        mutex_unlock(&state->ca_mutex);
        kfree(b);
        return ret;
}

static int az6027_ci_write_cam_control(struct dvb_ca_en50221 *ca,
                                       int slot,
                                       u8 address,
                                       u8 value)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        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 = az6027_usb_out_op(d, req, value1, index, NULL, blen);
        if (ret != 0) {
                warn("usb out operation failed. (%d)", 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 = az6027_usb_in_op(d, req, value, index, b, blen);
        if (ret < 0) {
                warn("usb in operation failed. (%d)", ret);
                ret = -EIO;
        } else{
                ret = b[0];
        }
        kfree(b);
        return ret;
}

static int az6027_ci_slot_reset(struct dvb_ca_en50221 *ca, int slot)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        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 = az6027_usb_out_op(d, req, value, index, NULL, blen);
        if (ret != 0) {
                warn("usb out operation failed. (%d)", ret);
                goto failed;
        }

        msleep(500);
        req = 0xC6;
        value = 0;
        index = 0;
        blen = 0;

        ret = az6027_usb_out_op(d, req, value, index, NULL, blen);
        if (ret != 0) {
                warn("usb out operation failed. (%d)", ret);
                goto failed;
        }

        for (i = 0; i < 15; i++) {
                msleep(100);

                if (CI_CamReady(ca, slot)) {
                        deb_info("CAM Ready");
                        break;
                }
        }
        msleep(5000);

failed:
        mutex_unlock(&state->ca_mutex);
        return ret;
}

static int az6027_ci_slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
{
        return 0;
}

static int az6027_ci_slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;

        int ret;
        u8 req;
        u16 value;
        u16 index;
        int blen;

        deb_info("%s", __func__);
        mutex_lock(&state->ca_mutex);
        req = 0xC7;
        value = 1;
        index = 0;
        blen = 0;

        ret = az6027_usb_out_op(d, req, value, index, NULL, blen);
        if (ret != 0) {
                warn("usb out operation failed. (%d)", ret);
                goto failed;
        }

failed:
        mutex_unlock(&state->ca_mutex);
        return ret;
}

static int az6027_ci_poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
{
        struct dvb_usb_device *d = ca->data;
        struct az6027_device_state *state = d->priv;
        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 = az6027_usb_in_op(d, req, value, index, b, blen);
        if (ret < 0) {
                warn("usb in operation failed. (%d)", 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 az6027_ci_uninit(struct dvb_usb_device *d)
{
        struct az6027_device_state *state;

        deb_info("%s", __func__);

        if (NULL == d)
                return;

        state = d->priv;
        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 az6027_ci_init(struct dvb_usb_adapter *a)
{
        struct dvb_usb_device *d = a->dev;
        struct az6027_device_state *state = d->priv;
        int ret;

        deb_info("%s", __func__);

        mutex_init(&state->ca_mutex);

        state->ca.owner                 = THIS_MODULE;
        state->ca.read_attribute_mem    = az6027_ci_read_attribute_mem;
        state->ca.write_attribute_mem   = az6027_ci_write_attribute_mem;
        state->ca.read_cam_control      = az6027_ci_read_cam_control;
        state->ca.write_cam_control     = az6027_ci_write_cam_control;
        state->ca.slot_reset            = az6027_ci_slot_reset;
        state->ca.slot_shutdown         = az6027_ci_slot_shutdown;
        state->ca.slot_ts_enable        = az6027_ci_slot_ts_enable;
        state->ca.poll_slot_status      = az6027_ci_poll_slot_status;
        state->ca.data                  = d;

        ret = dvb_ca_en50221_init(&a->dvb_adap,
                                  &state->ca,
                                  0, /* flags */
                                  1);/* n_slots */
        if (ret != 0) {
                err("Cannot initialize CI: Error %d.", ret);
                memset(&state->ca, 0, sizeof(state->ca));
                return ret;
        }

        deb_info("CI initialized.");

        return 0;
}

/*
static int az6027_read_mac_addr(struct dvb_usb_device *d, u8 mac[6])
{
        az6027_usb_in_op(d, 0xb7, 6, 0, &mac[0], 6);
        return 0;
}
*/

static int az6027_set_voltage(struct dvb_frontend *fe,
                              enum fe_sec_voltage voltage)
{

        u8 buf;
        struct dvb_usb_adapter *adap = fe->dvb->priv;

        struct i2c_msg i2c_msg = {
                .addr   = 0x99,
                .flags  = 0,
                .buf    = &buf,
                .len    = 1
        };

        /*
         * 2   --18v
         * 1   --13v
         * 0   --off
         */
        switch (voltage) {
        case SEC_VOLTAGE_13:
                buf = 1;
                i2c_transfer(&adap->dev->i2c_adap, &i2c_msg, 1);
                break;

        case SEC_VOLTAGE_18:
                buf = 2;
                i2c_transfer(&adap->dev->i2c_adap, &i2c_msg, 1);
                break;

        case SEC_VOLTAGE_OFF:
                buf = 0;
                i2c_transfer(&adap->dev->i2c_adap, &i2c_msg, 1);
                break;

        default:
                return -EINVAL;
        }
        return 0;
}


static int az6027_frontend_poweron(struct dvb_usb_adapter *adap)
{
        int ret;
        u8 req;
        u16 value;
        u16 index;
        int blen;

        req = 0xBC;
        value = 1; /* power on */
        index = 3;
        blen = 0;

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                return -EIO;

        return 0;
}
static int az6027_frontend_reset(struct dvb_usb_adapter *adap)
{
        int ret;
        u8 req;
        u16 value;
        u16 index;
        int blen;

        /* reset demodulator */
        req = 0xC0;
        value = 1; /* high */
        index = 3;
        blen = 0;

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                return -EIO;

        req = 0xC0;
        value = 0; /* low */
        index = 3;
        blen = 0;
        msleep_interruptible(200);

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                return -EIO;

        msleep_interruptible(200);

        req = 0xC0;
        value = 1; /*high */
        index = 3;
        blen = 0;

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                return -EIO;

        msleep_interruptible(200);
        return 0;
}

static int az6027_frontend_tsbypass(struct dvb_usb_adapter *adap, int onoff)
{
        int ret;
        u8 req;
        u16 value;
        u16 index;
        int blen;

        /* TS passthrough */
        req = 0xC7;
        value = onoff;
        index = 0;
        blen = 0;

        ret = az6027_usb_out_op(adap->dev, req, value, index, NULL, blen);
        if (ret != 0)
                return -EIO;

        return 0;
}

static int az6027_frontend_attach(struct dvb_usb_adapter *adap)
{

        az6027_frontend_poweron(adap);
        az6027_frontend_reset(adap);

        deb_info("adap = %p, dev = %p\n", adap, adap->dev);
        adap->fe_adap[0].fe = stb0899_attach(&az6027_stb0899_config, &adap->dev->i2c_adap);

        if (adap->fe_adap[0].fe) {
                deb_info("found STB0899 DVB-S/DVB-S2 frontend @0x%02x", az6027_stb0899_config.demod_address);
                if (stb6100_attach(adap->fe_adap[0].fe, &az6027_stb6100_config, &adap->dev->i2c_adap)) {
                        deb_info("found STB6100 DVB-S/DVB-S2 frontend @0x%02x", az6027_stb6100_config.tuner_address);
                        adap->fe_adap[0].fe->ops.set_voltage = az6027_set_voltage;
                        az6027_ci_init(adap);
                } else {
                        adap->fe_adap[0].fe = NULL;
                }
        } else
                warn("no front-end attached\n");

        az6027_frontend_tsbypass(adap, 0);

        return 0;
}

static struct dvb_usb_device_properties az6027_properties;

static void az6027_usb_disconnect(struct usb_interface *intf)
{
        struct dvb_usb_device *d = usb_get_intfdata(intf);
        az6027_ci_uninit(d);
        dvb_usb_device_exit(intf);
}


static int az6027_usb_probe(struct usb_interface *intf,
                            const struct usb_device_id *id)
{
        return dvb_usb_device_init(intf,
                                   &az6027_properties,
                                   THIS_MODULE,
                                   NULL,
                                   adapter_nr);
}

/* I2C */
static int az6027_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], int num)
{
        struct dvb_usb_device *d = i2c_get_adapdata(adap);
        int i = 0, j = 0, len = 0;
        u16 index;
        u16 value;
        int length;
        u8 req;
        u8 *data;

        data = kmalloc(256, GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        if (mutex_lock_interruptible(&d->i2c_mutex) < 0) {
                kfree(data);
                return -EAGAIN;
        }

        if (num > 2)
                warn("more than 2 i2c messages at a time is not handled yet. TODO.");

        for (i = 0; i < num; i++) {

                if (msg[i].addr == 0x99) {
                        req = 0xBE;
                        index = 0;
                        if (msg[i].len < 1) {
                                i = -EOPNOTSUPP;
                                break;
                        }
                        value = msg[i].buf[0] & 0x00ff;
                        length = 1;
                        az6027_usb_out_op(d, req, value, index, data, length);
                }

                if (msg[i].addr == 0xd0) {
                        /* write/read request */
                        if (i + 1 < num && (msg[i + 1].flags & I2C_M_RD)) {
                                req = 0xB9;
                                if (msg[i].len < 1) {
                                        i = -EOPNOTSUPP;
                                        break;
                                }
                                index = (((msg[i].buf[0] << 8) & 0xff00) | (msg[i].buf[1] & 0x00ff));
                                value = msg[i].addr + (msg[i].len << 8);
                                length = msg[i + 1].len + 6;
                                az6027_usb_in_op(d, req, value, index, data, length);
                                len = msg[i + 1].len;
                                for (j = 0; j < len; j++)
                                        msg[i + 1].buf[j] = data[j + 5];

                                i++;
                        } else {

                                /* demod 16bit addr */
                                req = 0xBD;
                                if (msg[i].len < 1) {
                                        i = -EOPNOTSUPP;
                                        break;
                                }
                                index = (((msg[i].buf[0] << 8) & 0xff00) | (msg[i].buf[1] & 0x00ff));
                                value = msg[i].addr + (2 << 8);
                                length = msg[i].len - 2;
                                len = msg[i].len - 2;
                                for (j = 0; j < len; j++)
                                        data[j] = msg[i].buf[j + 2];
                                az6027_usb_out_op(d, req, value, index, data, length);
                        }
                }

                if (msg[i].addr == 0xc0) {
                        if (msg[i].flags & I2C_M_RD) {

                                req = 0xB9;
                                index = 0x0;
                                value = msg[i].addr;
                                length = msg[i].len + 6;
                                az6027_usb_in_op(d, req, value, index, data, length);
                                len = msg[i].len;
                                for (j = 0; j < len; j++)
                                        msg[i].buf[j] = data[j + 5];

                        } else {

                                req = 0xBD;
                                if (msg[i].len < 1) {
                                        i = -EOPNOTSUPP;
                                        break;
                                }
                                index = msg[i].buf[0] & 0x00FF;
                                value = msg[i].addr + (1 << 8);
                                length = msg[i].len - 1;
                                len = msg[i].len - 1;

                                for (j = 0; j < len; j++)
                                        data[j] = msg[i].buf[j + 1];

                                az6027_usb_out_op(d, req, value, index, data, length);
                        }
                }
        }
        mutex_unlock(&d->i2c_mutex);
        kfree(data);

        return i;
}


static u32 az6027_i2c_func(struct i2c_adapter *adapter)
{
        return I2C_FUNC_I2C;
}

static const struct i2c_algorithm az6027_i2c_algo = {
        .master_xfer   = az6027_i2c_xfer,
        .functionality = az6027_i2c_func,
};

static int az6027_identify_state(struct usb_device *udev,
                                 const struct dvb_usb_device_properties *props,
                                 const struct dvb_usb_device_description **desc,
                                 int *cold)
{
        u8 *b;
        s16 ret;

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

        ret = usb_control_msg(udev,
                                  usb_rcvctrlpipe(udev, 0),
                                  0xb7,
                                  USB_TYPE_VENDOR | USB_DIR_IN,
                                  6,
                                  0,
                                  b,
                                  6,
                                  USB_CTRL_GET_TIMEOUT);

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


enum {
        AZUREWAVE_AZ6027,
        TERRATEC_DVBS2CI_V1,
        TERRATEC_DVBS2CI_V2,
        TECHNISAT_USB2_HDCI_V1,
        TECHNISAT_USB2_HDCI_V2,
        ELGATO_EYETV_SAT,
        ELGATO_EYETV_SAT_V2,
        ELGATO_EYETV_SAT_V3,
};

static const struct usb_device_id az6027_usb_table[] = {
        DVB_USB_DEV(AZUREWAVE, AZUREWAVE_AZ6027),
        DVB_USB_DEV(TERRATEC, TERRATEC_DVBS2CI_V1),
        DVB_USB_DEV(TERRATEC, TERRATEC_DVBS2CI_V2),
        DVB_USB_DEV(TECHNISAT, TECHNISAT_USB2_HDCI_V1),
        DVB_USB_DEV(TECHNISAT, TECHNISAT_USB2_HDCI_V2),
        DVB_USB_DEV(ELGATO, ELGATO_EYETV_SAT),
        DVB_USB_DEV(ELGATO, ELGATO_EYETV_SAT_V2),
        DVB_USB_DEV(ELGATO, ELGATO_EYETV_SAT_V3),
        { }
};

MODULE_DEVICE_TABLE(usb, az6027_usb_table);

static struct dvb_usb_device_properties az6027_properties = {
        .caps = DVB_USB_IS_AN_I2C_ADAPTER,
        .usb_ctrl = CYPRESS_FX2,
        .firmware            = "dvb-usb-az6027-03.fw",
        .no_reconnect        = 1,

        .size_of_priv     = sizeof(struct az6027_device_state),
        .identify_state         = az6027_identify_state,
        .num_adapters = 1,
        .adapter = {
                {
                .num_frontends = 1,
                .fe = {{
                        .streaming_ctrl   = az6027_streaming_ctrl,
                        .frontend_attach  = az6027_frontend_attach,

                        /* parameter for the MPEG2-data transfer */
                        .stream = {
                                .type = USB_BULK,
                                .count = 10,
                                .endpoint = 0x02,
                                .u = {
                                        .bulk = {
                                                .buffersize = 4096,
                                        }
                                }
                        },
                }},
                }
        },
/*
        .power_ctrl       = az6027_power_ctrl,
        .read_mac_address = az6027_read_mac_addr,
 */
        .rc.legacy = {
                .rc_map_table     = rc_map_az6027_table,
                .rc_map_size      = ARRAY_SIZE(rc_map_az6027_table),
                .rc_interval      = 400,
                .rc_query         = az6027_rc_query,
        },

        .i2c_algo         = &az6027_i2c_algo,

        .num_device_descs = 8,
        .devices = {
                {
                        .name = "AZUREWAVE DVB-S/S2 USB2.0 (AZ6027)",
                        .cold_ids = { &az6027_usb_table[AZUREWAVE_AZ6027], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "TERRATEC S7",
                        .cold_ids = { &az6027_usb_table[TERRATEC_DVBS2CI_V1], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "TERRATEC S7 MKII",
                        .cold_ids = { &az6027_usb_table[TERRATEC_DVBS2CI_V2], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "Technisat SkyStar USB 2 HD CI",
                        .cold_ids = { &az6027_usb_table[TECHNISAT_USB2_HDCI_V1], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "Technisat SkyStar USB 2 HD CI",
                        .cold_ids = { &az6027_usb_table[TECHNISAT_USB2_HDCI_V2], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "Elgato EyeTV Sat",
                        .cold_ids = { &az6027_usb_table[ELGATO_EYETV_SAT], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "Elgato EyeTV Sat",
                        .cold_ids = { &az6027_usb_table[ELGATO_EYETV_SAT_V2], NULL },
                        .warm_ids = { NULL },
                }, {
                        .name = "Elgato EyeTV Sat",
                        .cold_ids = { &az6027_usb_table[ELGATO_EYETV_SAT_V3], NULL },
                        .warm_ids = { NULL },
                },
                { NULL },
        }
};

/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver az6027_usb_driver = {
        .name           = "dvb_usb_az6027",
        .probe          = az6027_usb_probe,
        .disconnect     = az6027_usb_disconnect,
        .id_table       = az6027_usb_table,
};

module_usb_driver(az6027_usb_driver);

MODULE_AUTHOR("Adams Xu <Adams.xu@azwave.com.cn>");
MODULE_DESCRIPTION("Driver for AZUREWAVE DVB-S/S2 USB2.0 (AZ6027)");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");