forked from Minki/linux
V4L/DVB (7347): tuner-simple: add basic support for digital tuning of hybrid devices
Add entry points used for digital tuning via the dvb_frontend. Share state data between multiple instances of the driver for hybrid tuners. Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky
Mauro Carvalho Chehab
parent
ac8b63b30a
commit
62325497db
@ -88,14 +88,20 @@ MODULE_PARM_DESC(offset, "Allows to specify an offset for tuner");
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#define TUNER_PLL_LOCKED 0x40
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#define TUNER_STEREO_MK3 0x04
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static DEFINE_MUTEX(tuner_simple_list_mutex);
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static LIST_HEAD(hybrid_tuner_instance_list);
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struct tuner_simple_priv {
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u16 last_div;
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struct tuner_i2c_props i2c_props;
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struct list_head hybrid_tuner_instance_list;
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unsigned int type;
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struct tunertype *tun;
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u32 frequency;
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u32 bandwidth;
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};
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/* ---------------------------------------------------------------------- */
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@ -188,6 +194,9 @@ static inline char *tuner_param_name(enum param_type type)
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case TUNER_PARAM_TYPE_NTSC:
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name = "ntsc";
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break;
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case TUNER_PARAM_TYPE_DIGITAL:
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name = "digital";
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break;
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default:
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name = "unknown";
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break;
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@ -687,14 +696,118 @@ static int simple_set_params(struct dvb_frontend *fe,
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priv->frequency = params->frequency * 62500;
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break;
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}
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priv->bandwidth = 0;
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return ret;
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}
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static int simple_dvb_configure(struct dvb_frontend *fe, u8 *buf,
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const struct dvb_frontend_parameters *params)
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{
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struct tuner_simple_priv *priv = fe->tuner_priv;
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struct tunertype *tun = priv->tun;
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static struct tuner_params *t_params;
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u8 config, cb;
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u32 div;
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int ret, frequency = params->frequency / 62500;
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t_params = simple_tuner_params(fe, TUNER_PARAM_TYPE_DIGITAL);
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ret = simple_config_lookup(fe, t_params, &frequency, &config, &cb);
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if (ret < 0)
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return ret;
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div = ((frequency + t_params->iffreq) * 62500 + offset +
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tun->stepsize/2) / tun->stepsize;
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buf[0] = div >> 8;
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buf[1] = div & 0xff;
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buf[2] = config;
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buf[3] = cb;
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tuner_dbg("%s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
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tun->name, div, buf[0], buf[1], buf[2], buf[3]);
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/* calculate the frequency we set it to */
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return (div * tun->stepsize) - t_params->iffreq;
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}
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static int simple_dvb_calc_regs(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params,
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u8 *buf, int buf_len)
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{
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struct tuner_simple_priv *priv = fe->tuner_priv;
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int ret;
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u32 frequency;
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if (buf_len < 5)
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return -EINVAL;
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ret = simple_dvb_configure(fe, buf+1, params);
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if (ret < 0)
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return ret;
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else
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frequency = ret;
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buf[0] = priv->i2c_props.addr;
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priv->frequency = frequency;
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priv->bandwidth = (fe->ops.info.type == FE_OFDM) ?
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params->u.ofdm.bandwidth : 0;
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return 5;
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}
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static int simple_dvb_set_params(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params)
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{
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struct tuner_simple_priv *priv = fe->tuner_priv;
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u32 prev_freq, prev_bw;
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int ret;
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u8 buf[5];
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if (priv->i2c_props.adap == NULL)
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return -EINVAL;
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prev_freq = priv->frequency;
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prev_bw = priv->bandwidth;
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ret = simple_dvb_calc_regs(fe, params, buf, 5);
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if (ret != 5)
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goto fail;
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/* put analog demod in standby when tuning digital */
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if (fe->ops.analog_ops.standby)
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fe->ops.analog_ops.standby(fe);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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/* buf[0] contains the i2c address, but *
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* we already have it in i2c_props.addr */
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ret = tuner_i2c_xfer_send(&priv->i2c_props, buf+1, 4);
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if (ret != 4)
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goto fail;
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return 0;
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fail:
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/* calc_regs sets frequency and bandwidth. if we failed, unset them */
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priv->frequency = prev_freq;
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priv->bandwidth = prev_bw;
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return ret;
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}
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static int simple_release(struct dvb_frontend *fe)
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{
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kfree(fe->tuner_priv);
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struct tuner_simple_priv *priv = fe->tuner_priv;
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mutex_lock(&tuner_simple_list_mutex);
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if (priv)
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hybrid_tuner_release_state(priv);
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mutex_unlock(&tuner_simple_list_mutex);
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fe->tuner_priv = NULL;
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return 0;
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@ -707,10 +820,20 @@ static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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return 0;
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}
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static int simple_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
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{
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struct tuner_simple_priv *priv = fe->tuner_priv;
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*bandwidth = priv->bandwidth;
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return 0;
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}
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static struct dvb_tuner_ops simple_tuner_ops = {
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.set_analog_params = simple_set_params,
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.set_params = simple_dvb_set_params,
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.calc_regs = simple_dvb_calc_regs,
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.release = simple_release,
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.get_frequency = simple_get_frequency,
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.get_bandwidth = simple_get_bandwidth,
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.get_status = simple_get_status,
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.get_rf_strength = simple_get_rf_strength,
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};
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@ -721,6 +844,7 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
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unsigned int type)
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{
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struct tuner_simple_priv *priv = NULL;
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int instance;
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if (type >= tuner_count) {
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printk(KERN_WARNING "%s: invalid tuner type: %d (max: %d)\n",
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@ -728,22 +852,34 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
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return NULL;
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}
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priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
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if (priv == NULL)
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mutex_lock(&tuner_simple_list_mutex);
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instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,
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hybrid_tuner_instance_list,
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i2c_adap, i2c_addr,
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"tuner-simple");
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switch (instance) {
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case 0:
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mutex_unlock(&tuner_simple_list_mutex);
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return NULL;
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fe->tuner_priv = priv;
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break;
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case 1:
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fe->tuner_priv = priv;
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priv->i2c_props.addr = i2c_addr;
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priv->i2c_props.adap = i2c_adap;
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priv->i2c_props.name = "tuner-simple";
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priv->type = type;
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priv->tun = &tuners[type];
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break;
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default:
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fe->tuner_priv = priv;
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break;
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}
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priv->type = type;
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priv->tun = &tuners[type];
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mutex_unlock(&tuner_simple_list_mutex);
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memcpy(&fe->ops.tuner_ops, &simple_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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tuner_info("type set to %d (%s)\n", priv->type, priv->tun->name);
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tuner_info("type set to %d (%s)\n", type, priv->tun->name);
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strlcpy(fe->ops.tuner_ops.info.name, priv->tun->name,
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sizeof(fe->ops.tuner_ops.info.name));
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@ -6,10 +6,11 @@
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#define __TUNER_TYPES_H__
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enum param_type {
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TUNER_PARAM_TYPE_RADIO, \
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TUNER_PARAM_TYPE_PAL, \
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TUNER_PARAM_TYPE_SECAM, \
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TUNER_PARAM_TYPE_NTSC
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TUNER_PARAM_TYPE_RADIO,
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TUNER_PARAM_TYPE_PAL,
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TUNER_PARAM_TYPE_SECAM,
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TUNER_PARAM_TYPE_NTSC,
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TUNER_PARAM_TYPE_DIGITAL,
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};
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struct tuner_range {
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@ -105,6 +106,7 @@ struct tuner_params {
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the SECAM-L/L' standards. Range: -16:+15 */
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signed int default_top_secam_high:5;
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u16 iffreq;
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unsigned int count;
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struct tuner_range *ranges;
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@ -114,6 +116,10 @@ struct tunertype {
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char *name;
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unsigned int count;
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struct tuner_params *params;
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u16 min;
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u16 max;
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u16 stepsize;
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};
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extern struct tunertype tuners[];
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