lg2160.c

Go to the documentation of this file.

/*
 *    Support for LG2160 - ATSC/MH
 *
 *    Copyright (C) 2010 Michael Krufky <[email protected]>
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/jiffies.h>
#include <linux/dvb/frontend.h>
#include "lg2160.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");

#define DBG_INFO 1
#define DBG_REG  2

#define lg_printk(kern, fmt, arg...)                    \
    printk(kern "%s: " fmt, __func__, ##arg)

#define lg_info(fmt, arg...)    printk(KERN_INFO "lg2160: " fmt, ##arg)
#define lg_warn(fmt, arg...)    lg_printk(KERN_WARNING,       fmt, ##arg)
#define lg_err(fmt, arg...) lg_printk(KERN_ERR,           fmt, ##arg)
#define lg_dbg(fmt, arg...) if (debug & DBG_INFO)           \
                lg_printk(KERN_DEBUG,         fmt, ##arg)
#define lg_reg(fmt, arg...) if (debug & DBG_REG)            \
                lg_printk(KERN_DEBUG,         fmt, ##arg)

#define lg_fail(ret)                            \
({                                  \
    int __ret;                          \
    __ret = (ret < 0);                      \
    if (__ret)                          \
        lg_err("error %d on line %d\n", ret, __LINE__);     \
    __ret;                              \
})

struct lg216x_state {
    struct i2c_adapter *i2c_adap;
    const struct lg2160_config *cfg;

    struct dvb_frontend frontend;

    u32 current_frequency;
    u8 parade_id;
    u8 fic_ver;
    unsigned int last_reset;
};

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

static int lg216x_write_reg(struct lg216x_state *state, u16 reg, u8 val)
{
    int ret;
    u8 buf[] = { reg >> 8, reg & 0xff, val };
    struct i2c_msg msg = {
        .addr = state->cfg->i2c_addr, .flags = 0,
        .buf = buf, .len = 3,
    };

    lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);

    ret = i2c_transfer(state->i2c_adap, &msg, 1);

    if (ret != 1) {
        lg_err("error (addr %02x %02x <- %02x, err = %i)\n",
               msg.buf[0], msg.buf[1], msg.buf[2], ret);
        if (ret < 0)
            return ret;
        else
            return -EREMOTEIO;
    }
    return 0;
}

static int lg216x_read_reg(struct lg216x_state *state, u16 reg, u8 *val)
{
    int ret;
    u8 reg_buf[] = { reg >> 8, reg & 0xff };
    struct i2c_msg msg[] = {
        { .addr = state->cfg->i2c_addr,
          .flags = 0, .buf = reg_buf, .len = 2 },
        { .addr = state->cfg->i2c_addr,
          .flags = I2C_M_RD, .buf = val, .len = 1 },
    };

    lg_reg("reg: 0x%04x\n", reg);

    ret = i2c_transfer(state->i2c_adap, msg, 2);

    if (ret != 2) {
        lg_err("error (addr %02x reg %04x error (ret == %i)\n",
               state->cfg->i2c_addr, reg, ret);
        if (ret < 0)
            return ret;
        else
            return -EREMOTEIO;
    }
    return 0;
}

struct lg216x_reg {
    u16 reg;
    u8 val;
};

static int lg216x_write_regs(struct lg216x_state *state,
                 struct lg216x_reg *regs, int len)
{
    int i, ret;

    lg_reg("writing %d registers...\n", len);

    for (i = 0; i < len; i++) {
        ret = lg216x_write_reg(state, regs[i].reg, regs[i].val);
        if (lg_fail(ret))
            return ret;
    }
    return 0;
}

static int lg216x_set_reg_bit(struct lg216x_state *state,
                  u16 reg, int bit, int onoff)
{
    u8 val;
    int ret;

    lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);

    ret = lg216x_read_reg(state, reg, &val);
    if (lg_fail(ret))
        goto fail;

    val &= ~(1 << bit);
    val |= (onoff & 1) << bit;

    ret = lg216x_write_reg(state, reg, val);
    lg_fail(ret);
fail:
    return ret;
}

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

static int lg216x_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
    struct lg216x_state *state = fe->demodulator_priv;
    int ret;

    if (state->cfg->deny_i2c_rptr)
        return 0;

    lg_dbg("(%d)\n", enable);

    ret = lg216x_set_reg_bit(state, 0x0000, 0, enable ? 0 : 1);

    msleep(1);

    return ret;
}

static int lg216x_soft_reset(struct lg216x_state *state)
{
    int ret;

    lg_dbg("\n");

    ret = lg216x_write_reg(state, 0x0002, 0x00);
    if (lg_fail(ret))
        goto fail;

    msleep(20);
    ret = lg216x_write_reg(state, 0x0002, 0x01);
    if (lg_fail(ret))
        goto fail;

    state->last_reset = jiffies_to_msecs(jiffies);
fail:
    return ret;
}

static int lg216x_initialize(struct lg216x_state *state)
{
    int ret;

    static struct lg216x_reg lg2160_init[] = {
#if 0
        { .reg = 0x0015, .val = 0xe6 },
#else
        { .reg = 0x0015, .val = 0xf7 },
        { .reg = 0x001b, .val = 0x52 },
        { .reg = 0x0208, .val = 0x00 },
        { .reg = 0x0209, .val = 0x82 },
        { .reg = 0x0210, .val = 0xf9 },
        { .reg = 0x020a, .val = 0x00 },
        { .reg = 0x020b, .val = 0x82 },
        { .reg = 0x020d, .val = 0x28 },
        { .reg = 0x020f, .val = 0x14 },
#endif
    };

    static struct lg216x_reg lg2161_init[] = {
        { .reg = 0x0000, .val = 0x41 },
        { .reg = 0x0001, .val = 0xfb },
        { .reg = 0x0216, .val = 0x00 },
        { .reg = 0x0219, .val = 0x00 },
        { .reg = 0x021b, .val = 0x55 },
        { .reg = 0x0606, .val = 0x0a },
    };

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_write_regs(state,
                    lg2160_init, ARRAY_SIZE(lg2160_init));
        break;
    case LG2161:
        ret = lg216x_write_regs(state,
                    lg2161_init, ARRAY_SIZE(lg2161_init));
        break;
    default:
        ret = -EINVAL;
        break;
    }
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_soft_reset(state);
    lg_fail(ret);
fail:
    return ret;
}

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

static int lg216x_set_if(struct lg216x_state *state)
{
    u8 val;
    int ret;

    lg_dbg("%d KHz\n", state->cfg->if_khz);

    ret = lg216x_read_reg(state, 0x0132, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xfb;
    val |= (0 == state->cfg->if_khz) ? 0x04 : 0x00;

    ret = lg216x_write_reg(state, 0x0132, val);
    lg_fail(ret);

    /* if NOT zero IF, 6 MHz is the default */
fail:
    return ret;
}

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

static int lg2160_agc_fix(struct lg216x_state *state,
              int if_agc_fix, int rf_agc_fix)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0100, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xf3;
    val |= (if_agc_fix) ? 0x08 : 0x00;
    val |= (rf_agc_fix) ? 0x04 : 0x00;

    ret = lg216x_write_reg(state, 0x0100, val);
    lg_fail(ret);
fail:
    return ret;
}

#if 0
static int lg2160_agc_freeze(struct lg216x_state *state,
                 int if_agc_freeze, int rf_agc_freeze)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0100, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xcf;
    val |= (if_agc_freeze) ? 0x20 : 0x00;
    val |= (rf_agc_freeze) ? 0x10 : 0x00;

    ret = lg216x_write_reg(state, 0x0100, val);
    lg_fail(ret);
fail:
    return ret;
}
#endif

static int lg2160_agc_polarity(struct lg216x_state *state,
                   int if_agc_polarity, int rf_agc_polarity)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0100, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xfc;
    val |= (if_agc_polarity) ? 0x02 : 0x00;
    val |= (rf_agc_polarity) ? 0x01 : 0x00;

    ret = lg216x_write_reg(state, 0x0100, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg2160_tuner_pwr_save_polarity(struct lg216x_state *state,
                      int polarity)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0008, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xfe;
    val |= (polarity) ? 0x01 : 0x00;

    ret = lg216x_write_reg(state, 0x0008, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg2160_spectrum_polarity(struct lg216x_state *state,
                    int inverted)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0132, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xfd;
    val |= (inverted) ? 0x02 : 0x00;

    ret = lg216x_write_reg(state, 0x0132, val);
    lg_fail(ret);
fail:
    return lg216x_soft_reset(state);
}

static int lg2160_tuner_pwr_save(struct lg216x_state *state, int onoff)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0007, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xbf;
    val |= (onoff) ? 0x40 : 0x00;

    ret = lg216x_write_reg(state, 0x0007, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg216x_set_parade(struct lg216x_state *state, int id)
{
    int ret;

    ret = lg216x_write_reg(state, 0x013e, id & 0x7f);
    if (lg_fail(ret))
        goto fail;

    state->parade_id = id & 0x7f;
fail:
    return ret;
}

static int lg216x_set_ensemble(struct lg216x_state *state, int id)
{
    int ret;
    u16 reg;
    u8 val;

    switch (state->cfg->lg_chip) {
    case LG2160:
        reg = 0x0400;
        break;
    case LG2161:
    default:
        reg = 0x0500;
        break;
    }

    ret = lg216x_read_reg(state, reg, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xfe;
    val |= (id) ? 0x01 : 0x00;

    ret = lg216x_write_reg(state, reg, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg2160_set_spi_clock(struct lg216x_state *state)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0014, &val);
    if (lg_fail(ret))
        goto fail;

    val &= 0xf3;
    val |= (state->cfg->spi_clock << 2);

    ret = lg216x_write_reg(state, 0x0014, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg2161_set_output_interface(struct lg216x_state *state)
{
    u8 val;
    int ret;

    ret = lg216x_read_reg(state, 0x0014, &val);
    if (lg_fail(ret))
        goto fail;

    val &= ~0x07;
    val |= state->cfg->output_if; /* FIXME: needs sanity check */

    ret = lg216x_write_reg(state, 0x0014, val);
    lg_fail(ret);
fail:
    return ret;
}

static int lg216x_enable_fic(struct lg216x_state *state, int onoff)
{
    int ret;

    ret = lg216x_write_reg(state, 0x0017, 0x23);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_write_reg(state, 0x0016, 0xfc);
    if (lg_fail(ret))
        goto fail;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_write_reg(state, 0x0016,
                       0xfc | ((onoff) ? 0x02 : 0x00));
        break;
    case LG2161:
        ret = lg216x_write_reg(state, 0x0016, (onoff) ? 0x10 : 0x00);
        break;
    }
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_initialize(state);
    if (lg_fail(ret))
        goto fail;

    if (onoff) {
        ret = lg216x_write_reg(state, 0x0017, 0x03);
        lg_fail(ret);
    }
fail:
    return ret;
}

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

static int lg216x_get_fic_version(struct lg216x_state *state, u8 *ficver)
{
    u8 val;
    int ret;

    *ficver = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0128, &val);
    if (lg_fail(ret))
        goto fail;

    *ficver = (val >> 3) & 0x1f;
fail:
    return ret;
}

#if 0
static int lg2160_get_parade_id(struct lg216x_state *state, u8 *id)
{
    u8 val;
    int ret;

    *id = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0123, &val);
    if (lg_fail(ret))
        goto fail;

    *id = val & 0x7f;
fail:
    return ret;
}
#endif

static int lg216x_get_nog(struct lg216x_state *state, u8 *nog)
{
    u8 val;
    int ret;

    *nog = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0124, &val);
    if (lg_fail(ret))
        goto fail;

    *nog = ((val >> 4) & 0x07) + 1;
fail:
    return ret;
}

static int lg216x_get_tnog(struct lg216x_state *state, u8 *tnog)
{
    u8 val;
    int ret;

    *tnog = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0125, &val);
    if (lg_fail(ret))
        goto fail;

    *tnog = val & 0x1f;
fail:
    return ret;
}

static int lg216x_get_sgn(struct lg216x_state *state, u8 *sgn)
{
    u8 val;
    int ret;

    *sgn = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0124, &val);
    if (lg_fail(ret))
        goto fail;

    *sgn = val & 0x0f;
fail:
    return ret;
}

static int lg216x_get_prc(struct lg216x_state *state, u8 *prc)
{
    u8 val;
    int ret;

    *prc = 0xff; /* invalid value */

    ret = lg216x_read_reg(state, 0x0125, &val);
    if (lg_fail(ret))
        goto fail;

    *prc = ((val >> 5) & 0x07) + 1;
fail:
    return ret;
}

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

static int lg216x_get_rs_frame_mode(struct lg216x_state *state,
                    enum atscmh_rs_frame_mode *rs_framemode)
{
    u8 val;
    int ret;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0410, &val);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x0513, &val);
        break;
    default:
        ret = -EINVAL;
    }
    if (lg_fail(ret))
        goto fail;

    switch ((val >> 4) & 0x03) {
#if 1
    default:
#endif
    case 0x00:
        *rs_framemode = ATSCMH_RSFRAME_PRI_ONLY;
        break;
    case 0x01:
        *rs_framemode = ATSCMH_RSFRAME_PRI_SEC;
        break;
#if 0
    default:
        *rs_framemode = ATSCMH_RSFRAME_RES;
        break;
#endif
    }
fail:
    return ret;
}

static
int lg216x_get_rs_frame_ensemble(struct lg216x_state *state,
                 enum atscmh_rs_frame_ensemble *rs_frame_ens)
{
    u8 val;
    int ret;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0400, &val);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x0500, &val);
        break;
    default:
        ret = -EINVAL;
    }
    if (lg_fail(ret))
        goto fail;

    val &= 0x01;
    *rs_frame_ens = (enum atscmh_rs_frame_ensemble) val;
fail:
    return ret;
}

static int lg216x_get_rs_code_mode(struct lg216x_state *state,
                   enum atscmh_rs_code_mode *rs_code_pri,
                   enum atscmh_rs_code_mode *rs_code_sec)
{
    u8 val;
    int ret;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0410, &val);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x0513, &val);
        break;
    default:
        ret = -EINVAL;
    }
    if (lg_fail(ret))
        goto fail;

    *rs_code_pri = (enum atscmh_rs_code_mode) ((val >> 2) & 0x03);
    *rs_code_sec = (enum atscmh_rs_code_mode) (val & 0x03);
fail:
    return ret;
}

static int lg216x_get_sccc_block_mode(struct lg216x_state *state,
                      enum atscmh_sccc_block_mode *sccc_block)
{
    u8 val;
    int ret;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0315, &val);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x0511, &val);
        break;
    default:
        ret = -EINVAL;
    }
    if (lg_fail(ret))
        goto fail;

    switch (val & 0x03) {
    case 0x00:
        *sccc_block = ATSCMH_SCCC_BLK_SEP;
        break;
    case 0x01:
        *sccc_block = ATSCMH_SCCC_BLK_COMB;
        break;
    default:
        *sccc_block = ATSCMH_SCCC_BLK_RES;
        break;
    }
fail:
    return ret;
}

static int lg216x_get_sccc_code_mode(struct lg216x_state *state,
                     enum atscmh_sccc_code_mode *mode_a,
                     enum atscmh_sccc_code_mode *mode_b,
                     enum atscmh_sccc_code_mode *mode_c,
                     enum atscmh_sccc_code_mode *mode_d)
{
    u8 val;
    int ret;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0316, &val);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x0512, &val);
        break;
    default:
        ret = -EINVAL;
    }
    if (lg_fail(ret))
        goto fail;

    switch ((val >> 6) & 0x03) {
    case 0x00:
        *mode_a = ATSCMH_SCCC_CODE_HLF;
        break;
    case 0x01:
        *mode_a = ATSCMH_SCCC_CODE_QTR;
        break;
    default:
        *mode_a = ATSCMH_SCCC_CODE_RES;
        break;
    }

    switch ((val >> 4) & 0x03) {
    case 0x00:
        *mode_b = ATSCMH_SCCC_CODE_HLF;
        break;
    case 0x01:
        *mode_b = ATSCMH_SCCC_CODE_QTR;
        break;
    default:
        *mode_b = ATSCMH_SCCC_CODE_RES;
        break;
    }

    switch ((val >> 2) & 0x03) {
    case 0x00:
        *mode_c = ATSCMH_SCCC_CODE_HLF;
        break;
    case 0x01:
        *mode_c = ATSCMH_SCCC_CODE_QTR;
        break;
    default:
        *mode_c = ATSCMH_SCCC_CODE_RES;
        break;
    }

    switch (val & 0x03) {
    case 0x00:
        *mode_d = ATSCMH_SCCC_CODE_HLF;
        break;
    case 0x01:
        *mode_d = ATSCMH_SCCC_CODE_QTR;
        break;
    default:
        *mode_d = ATSCMH_SCCC_CODE_RES;
        break;
    }
fail:
    return ret;
}

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

#if 0
static int lg216x_read_fic_err_count(struct lg216x_state *state, u8 *err)
{
    u8 fic_err;
    int ret;

    *err = 0;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg216x_read_reg(state, 0x0012, &fic_err);
        break;
    case LG2161:
        ret = lg216x_read_reg(state, 0x001e, &fic_err);
        break;
    }
    if (lg_fail(ret))
        goto fail;

    *err = fic_err;
fail:
    return ret;
}

static int lg2160_read_crc_err_count(struct lg216x_state *state, u16 *err)
{
    u8 crc_err1, crc_err2;
    int ret;

    *err = 0;

    ret = lg216x_read_reg(state, 0x0411, &crc_err1);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_read_reg(state, 0x0412, &crc_err2);
    if (lg_fail(ret))
        goto fail;

    *err = (u16)(((crc_err2 & 0x0f) << 8) | crc_err1);
fail:
    return ret;
}

static int lg2161_read_crc_err_count(struct lg216x_state *state, u16 *err)
{
    u8 crc_err;
    int ret;

    *err = 0;

    ret = lg216x_read_reg(state, 0x0612, &crc_err);
    if (lg_fail(ret))
        goto fail;

    *err = (u16)crc_err;
fail:
    return ret;
}

static int lg216x_read_crc_err_count(struct lg216x_state *state, u16 *err)
{
    int ret;
    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg2160_read_crc_err_count(state, err);
        break;
    case LG2161:
        ret = lg2161_read_crc_err_count(state, err);
        break;
    default:
        ret = -EINVAL;
        break;
    }
    return ret;
}

static int lg2160_read_rs_err_count(struct lg216x_state *state, u16 *err)
{
    u8 rs_err1, rs_err2;
    int ret;

    *err = 0;

    ret = lg216x_read_reg(state, 0x0413, &rs_err1);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_read_reg(state, 0x0414, &rs_err2);
    if (lg_fail(ret))
        goto fail;

    *err = (u16)(((rs_err2 & 0x0f) << 8) | rs_err1);
fail:
    return ret;
}

static int lg2161_read_rs_err_count(struct lg216x_state *state, u16 *err)
{
    u8 rs_err1, rs_err2;
    int ret;

    *err = 0;

    ret = lg216x_read_reg(state, 0x0613, &rs_err1);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_read_reg(state, 0x0614, &rs_err2);
    if (lg_fail(ret))
        goto fail;

    *err = (u16)((rs_err1 << 8) | rs_err2);
fail:
    return ret;
}

static int lg216x_read_rs_err_count(struct lg216x_state *state, u16 *err)
{
    int ret;
    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg2160_read_rs_err_count(state, err);
        break;
    case LG2161:
        ret = lg2161_read_rs_err_count(state, err);
        break;
    default:
        ret = -EINVAL;
        break;
    }
    return ret;
}
#endif

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

static int lg216x_get_frontend(struct dvb_frontend *fe)
{
    struct lg216x_state *state = fe->demodulator_priv;
    int ret;

    lg_dbg("\n");

    fe->dtv_property_cache.modulation = VSB_8;
    fe->dtv_property_cache.frequency = state->current_frequency;
    fe->dtv_property_cache.delivery_system = SYS_ATSCMH;

    ret = lg216x_get_fic_version(state,
                     &fe->dtv_property_cache.atscmh_fic_ver);
    if (lg_fail(ret))
        goto fail;
    if (state->fic_ver != fe->dtv_property_cache.atscmh_fic_ver) {
        state->fic_ver = fe->dtv_property_cache.atscmh_fic_ver;

#if 0
        ret = lg2160_get_parade_id(state,
                &fe->dtv_property_cache.atscmh_parade_id);
        if (lg_fail(ret))
            goto fail;
/* #else */
        fe->dtv_property_cache.atscmh_parade_id = state->parade_id;
#endif
        ret = lg216x_get_nog(state,
                     &fe->dtv_property_cache.atscmh_nog);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_tnog(state,
                      &fe->dtv_property_cache.atscmh_tnog);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_sgn(state,
                     &fe->dtv_property_cache.atscmh_sgn);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_prc(state,
                     &fe->dtv_property_cache.atscmh_prc);
        if (lg_fail(ret))
            goto fail;

        ret = lg216x_get_rs_frame_mode(state,
            (enum atscmh_rs_frame_mode *)
            &fe->dtv_property_cache.atscmh_rs_frame_mode);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_rs_frame_ensemble(state,
            (enum atscmh_rs_frame_ensemble *)
            &fe->dtv_property_cache.atscmh_rs_frame_ensemble);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_rs_code_mode(state,
            (enum atscmh_rs_code_mode *)
            &fe->dtv_property_cache.atscmh_rs_code_mode_pri,
            (enum atscmh_rs_code_mode *)
            &fe->dtv_property_cache.atscmh_rs_code_mode_sec);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_sccc_block_mode(state,
            (enum atscmh_sccc_block_mode *)
            &fe->dtv_property_cache.atscmh_sccc_block_mode);
        if (lg_fail(ret))
            goto fail;
        ret = lg216x_get_sccc_code_mode(state,
            (enum atscmh_sccc_code_mode *)
            &fe->dtv_property_cache.atscmh_sccc_code_mode_a,
            (enum atscmh_sccc_code_mode *)
            &fe->dtv_property_cache.atscmh_sccc_code_mode_b,
            (enum atscmh_sccc_code_mode *)
            &fe->dtv_property_cache.atscmh_sccc_code_mode_c,
            (enum atscmh_sccc_code_mode *)
            &fe->dtv_property_cache.atscmh_sccc_code_mode_d);
        if (lg_fail(ret))
            goto fail;
    }
#if 0
    ret = lg216x_read_fic_err_count(state,
                (u8 *)&fe->dtv_property_cache.atscmh_fic_err);
    if (lg_fail(ret))
        goto fail;
    ret = lg216x_read_crc_err_count(state,
                &fe->dtv_property_cache.atscmh_crc_err);
    if (lg_fail(ret))
        goto fail;
    ret = lg216x_read_rs_err_count(state,
                &fe->dtv_property_cache.atscmh_rs_err);
    if (lg_fail(ret))
        goto fail;

    switch (state->cfg->lg_chip) {
    case LG2160:
        if (((fe->dtv_property_cache.atscmh_rs_err >= 240) &&
             (fe->dtv_property_cache.atscmh_crc_err >= 240)) &&
            ((jiffies_to_msecs(jiffies) - state->last_reset) > 6000))
            ret = lg216x_soft_reset(state);
        break;
    case LG2161:
        /* no fix needed here (as far as we know) */
        ret = 0;
        break;
    }
    lg_fail(ret);
#endif
fail:
    return ret;
}

static int lg216x_get_property(struct dvb_frontend *fe,
                   struct dtv_property *tvp)
{
    return (DTV_ATSCMH_FIC_VER == tvp->cmd) ?
        lg216x_get_frontend(fe) : 0;
}


static int lg2160_set_frontend(struct dvb_frontend *fe)
{
    struct lg216x_state *state = fe->demodulator_priv;
    int ret;

    lg_dbg("(%d)\n", fe->dtv_property_cache.frequency);

    if (fe->ops.tuner_ops.set_params) {
        ret = fe->ops.tuner_ops.set_params(fe);
        if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 0);
        if (lg_fail(ret))
            goto fail;
        state->current_frequency = fe->dtv_property_cache.frequency;
    }

    ret = lg2160_agc_fix(state, 0, 0);
    if (lg_fail(ret))
        goto fail;
    ret = lg2160_agc_polarity(state, 0, 0);
    if (lg_fail(ret))
        goto fail;
    ret = lg2160_tuner_pwr_save_polarity(state, 1);
    if (lg_fail(ret))
        goto fail;
    ret = lg216x_set_if(state);
    if (lg_fail(ret))
        goto fail;
    ret = lg2160_spectrum_polarity(state, state->cfg->spectral_inversion);
    if (lg_fail(ret))
        goto fail;

    /* be tuned before this point */
    ret = lg216x_soft_reset(state);
    if (lg_fail(ret))
        goto fail;

    ret = lg2160_tuner_pwr_save(state, 0);
    if (lg_fail(ret))
        goto fail;

    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg2160_set_spi_clock(state);
        if (lg_fail(ret))
            goto fail;
        break;
    case LG2161:
        ret = lg2161_set_output_interface(state);
        if (lg_fail(ret))
            goto fail;
        break;
    }

    ret = lg216x_set_parade(state, fe->dtv_property_cache.atscmh_parade_id);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_set_ensemble(state,
            fe->dtv_property_cache.atscmh_rs_frame_ensemble);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_initialize(state);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_enable_fic(state, 1);
    lg_fail(ret);

    lg216x_get_frontend(fe);
fail:
    return ret;
}

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

static int lg2160_read_lock_status(struct lg216x_state *state,
                   int *acq_lock, int *sync_lock)
{
    u8 val;
    int ret;

    *acq_lock = 0;
    *sync_lock = 0;

    ret = lg216x_read_reg(state, 0x011b, &val);
    if (lg_fail(ret))
        goto fail;

    *sync_lock = (val & 0x20) ? 0 : 1;
    *acq_lock  = (val & 0x40) ? 0 : 1;
fail:
    return ret;
}

#ifdef USE_LG2161_LOCK_BITS
static int lg2161_read_lock_status(struct lg216x_state *state,
                   int *acq_lock, int *sync_lock)
{
    u8 val;
    int ret;

    *acq_lock = 0;
    *sync_lock = 0;

    ret = lg216x_read_reg(state, 0x0304, &val);
    if (lg_fail(ret))
        goto fail;

    *sync_lock = (val & 0x80) ? 0 : 1;

    ret = lg216x_read_reg(state, 0x011b, &val);
    if (lg_fail(ret))
        goto fail;

    *acq_lock  = (val & 0x40) ? 0 : 1;
fail:
    return ret;
}
#endif

static int lg216x_read_lock_status(struct lg216x_state *state,
                   int *acq_lock, int *sync_lock)
{
#ifdef USE_LG2161_LOCK_BITS
    int ret;
    switch (state->cfg->lg_chip) {
    case LG2160:
        ret = lg2160_read_lock_status(state, acq_lock, sync_lock);
        break;
    case LG2161:
        ret = lg2161_read_lock_status(state, acq_lock, sync_lock);
        break;
    default:
        ret = -EINVAL;
        break;
    }
    return ret;
#else
    return lg2160_read_lock_status(state, acq_lock, sync_lock);
#endif
}

static int lg216x_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
    struct lg216x_state *state = fe->demodulator_priv;
    int ret, acq_lock, sync_lock;

    *status = 0;

    ret = lg216x_read_lock_status(state, &acq_lock, &sync_lock);
    if (lg_fail(ret))
        goto fail;

    lg_dbg("%s%s\n",
           acq_lock  ? "SIGNALEXIST " : "",
           sync_lock ? "SYNCLOCK"     : "");

    if (acq_lock)
        *status |= FE_HAS_SIGNAL;
    if (sync_lock)
        *status |= FE_HAS_SYNC;

    if (*status)
        *status |= FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_LOCK;

fail:
    return ret;
}

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

static int lg2160_read_snr(struct dvb_frontend *fe, u16 *snr)
{
    struct lg216x_state *state = fe->demodulator_priv;
    u8 snr1, snr2;
    int ret;

    *snr = 0;

    ret = lg216x_read_reg(state, 0x0202, &snr1);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_read_reg(state, 0x0203, &snr2);
    if (lg_fail(ret))
        goto fail;

    if ((snr1 == 0xba) || (snr2 == 0xdf))
        *snr = 0;
    else
#if 1
    *snr =  ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 >> 4);
#else /* BCD */
    *snr =  (snr2 | (snr1 << 8));
#endif
fail:
    return ret;
}

static int lg2161_read_snr(struct dvb_frontend *fe, u16 *snr)
{
    struct lg216x_state *state = fe->demodulator_priv;
    u8 snr1, snr2;
    int ret;

    *snr = 0;

    ret = lg216x_read_reg(state, 0x0302, &snr1);
    if (lg_fail(ret))
        goto fail;

    ret = lg216x_read_reg(state, 0x0303, &snr2);
    if (lg_fail(ret))
        goto fail;

    if ((snr1 == 0xba) || (snr2 == 0xfd))
        *snr = 0;
    else

    *snr =  ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 & 0x0f);
fail:
    return ret;
}

static int lg216x_read_signal_strength(struct dvb_frontend *fe,
                       u16 *strength)
{
#if 0
    /* borrowed from lgdt330x.c
     *
     * Calculate strength from SNR up to 35dB
     * Even though the SNR can go higher than 35dB,
     * there is some comfort factor in having a range of
     * strong signals that can show at 100%
     */
    struct lg216x_state *state = fe->demodulator_priv;
    u16 snr;
    int ret;
#endif
    *strength = 0;
#if 0
    ret = fe->ops.read_snr(fe, &snr);
    if (lg_fail(ret))
        goto fail;
    /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
    /* scale the range 0 - 35*2^24 into 0 - 65535 */
    if (state->snr >= 8960 * 0x10000)
        *strength = 0xffff;
    else
        *strength = state->snr / 8960;
fail:
    return ret;
#else
    return 0;
#endif
}

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

static int lg216x_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
#if 0
    struct lg216x_state *state = fe->demodulator_priv;
    int ret;

    ret = lg216x_read_rs_err_count(state,
                       &fe->dtv_property_cache.atscmh_rs_err);
    if (lg_fail(ret))
        goto fail;

    *ucblocks = fe->dtv_property_cache.atscmh_rs_err;
fail:
#else
    *ucblocks = 0;
#endif
    return 0;
}

static int lg216x_get_tune_settings(struct dvb_frontend *fe,
                    struct dvb_frontend_tune_settings
                    *fe_tune_settings)
{
    fe_tune_settings->min_delay_ms = 500;
    lg_dbg("\n");
    return 0;
}

static void lg216x_release(struct dvb_frontend *fe)
{
    struct lg216x_state *state = fe->demodulator_priv;
    lg_dbg("\n");
    kfree(state);
}

static struct dvb_frontend_ops lg2160_ops = {
    .delsys = { SYS_ATSCMH },
    .info = {
        .name = "LG Electronics LG2160 ATSC/MH Frontend",
        .frequency_min      = 54000000,
        .frequency_max      = 858000000,
        .frequency_stepsize = 62500,
    },
    .i2c_gate_ctrl        = lg216x_i2c_gate_ctrl,
#if 0
    .init                 = lg216x_init,
    .sleep                = lg216x_sleep,
#endif
    .get_property         = lg216x_get_property,

    .set_frontend         = lg2160_set_frontend,
    .get_frontend         = lg216x_get_frontend,
    .get_tune_settings    = lg216x_get_tune_settings,
    .read_status          = lg216x_read_status,
#if 0
    .read_ber             = lg216x_read_ber,
#endif
    .read_signal_strength = lg216x_read_signal_strength,
    .read_snr             = lg2160_read_snr,
    .read_ucblocks        = lg216x_read_ucblocks,
    .release              = lg216x_release,
};

static struct dvb_frontend_ops lg2161_ops = {
    .delsys = { SYS_ATSCMH },
    .info = {
        .name = "LG Electronics LG2161 ATSC/MH Frontend",
        .frequency_min      = 54000000,
        .frequency_max      = 858000000,
        .frequency_stepsize = 62500,
    },
    .i2c_gate_ctrl        = lg216x_i2c_gate_ctrl,
#if 0
    .init                 = lg216x_init,
    .sleep                = lg216x_sleep,
#endif
    .get_property         = lg216x_get_property,

    .set_frontend         = lg2160_set_frontend,
    .get_frontend         = lg216x_get_frontend,
    .get_tune_settings    = lg216x_get_tune_settings,
    .read_status          = lg216x_read_status,
#if 0
    .read_ber             = lg216x_read_ber,
#endif
    .read_signal_strength = lg216x_read_signal_strength,
    .read_snr             = lg2161_read_snr,
    .read_ucblocks        = lg216x_read_ucblocks,
    .release              = lg216x_release,
};

struct dvb_frontend *lg2160_attach(const struct lg2160_config *config,
                   struct i2c_adapter *i2c_adap)
{
    struct lg216x_state *state = NULL;

    lg_dbg("(%d-%04x)\n",
           i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
           config ? config->i2c_addr : 0);

    state = kzalloc(sizeof(struct lg216x_state), GFP_KERNEL);
    if (!state)
        return NULL;

    state->cfg = config;
    state->i2c_adap = i2c_adap;
    state->fic_ver = 0xff;
    state->parade_id = 0xff;

    switch (config->lg_chip) {
    default:
        lg_warn("invalid chip requested, defaulting to LG2160");
        /* fall-thru */
    case LG2160:
        memcpy(&state->frontend.ops, &lg2160_ops,
               sizeof(struct dvb_frontend_ops));
        break;
    case LG2161:
        memcpy(&state->frontend.ops, &lg2161_ops,
               sizeof(struct dvb_frontend_ops));
        break;
    }

    state->frontend.demodulator_priv = state;
    state->current_frequency = -1;
    /* parade 1 by default */
    state->frontend.dtv_property_cache.atscmh_parade_id = 1;

    return &state->frontend;
}
EXPORT_SYMBOL(lg2160_attach);

MODULE_DESCRIPTION("LG Electronics LG216x ATSC/MH Demodulator Driver");
MODULE_AUTHOR("Michael Krufky <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.3");

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */