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>
diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c
index ee5ef86..d6d922c 100644
--- a/drivers/media/video/tuner-simple.c
+++ b/drivers/media/video/tuner-simple.c
@@ -88,14 +88,20 @@
#define TUNER_PLL_LOCKED 0x40
#define TUNER_STEREO_MK3 0x04
+static DEFINE_MUTEX(tuner_simple_list_mutex);
+static LIST_HEAD(hybrid_tuner_instance_list);
+
struct tuner_simple_priv {
u16 last_div;
+
struct tuner_i2c_props i2c_props;
+ struct list_head hybrid_tuner_instance_list;
unsigned int type;
struct tunertype *tun;
u32 frequency;
+ u32 bandwidth;
};
/* ---------------------------------------------------------------------- */
@@ -188,6 +194,9 @@
case TUNER_PARAM_TYPE_NTSC:
name = "ntsc";
break;
+ case TUNER_PARAM_TYPE_DIGITAL:
+ name = "digital";
+ break;
default:
name = "unknown";
break;
@@ -687,14 +696,118 @@
priv->frequency = params->frequency * 62500;
break;
}
+ priv->bandwidth = 0;
return ret;
}
+static int simple_dvb_configure(struct dvb_frontend *fe, u8 *buf,
+ const struct dvb_frontend_parameters *params)
+{
+ struct tuner_simple_priv *priv = fe->tuner_priv;
+ struct tunertype *tun = priv->tun;
+ static struct tuner_params *t_params;
+ u8 config, cb;
+ u32 div;
+ int ret, frequency = params->frequency / 62500;
+
+ t_params = simple_tuner_params(fe, TUNER_PARAM_TYPE_DIGITAL);
+ ret = simple_config_lookup(fe, t_params, &frequency, &config, &cb);
+ if (ret < 0)
+ return ret;
+
+ div = ((frequency + t_params->iffreq) * 62500 + offset +
+ tun->stepsize/2) / tun->stepsize;
+
+ buf[0] = div >> 8;
+ buf[1] = div & 0xff;
+ buf[2] = config;
+ buf[3] = cb;
+
+ tuner_dbg("%s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
+ tun->name, div, buf[0], buf[1], buf[2], buf[3]);
+
+ /* calculate the frequency we set it to */
+ return (div * tun->stepsize) - t_params->iffreq;
+}
+
+static int simple_dvb_calc_regs(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *params,
+ u8 *buf, int buf_len)
+{
+ struct tuner_simple_priv *priv = fe->tuner_priv;
+ int ret;
+ u32 frequency;
+
+ if (buf_len < 5)
+ return -EINVAL;
+
+ ret = simple_dvb_configure(fe, buf+1, params);
+ if (ret < 0)
+ return ret;
+ else
+ frequency = ret;
+
+ buf[0] = priv->i2c_props.addr;
+
+ priv->frequency = frequency;
+ priv->bandwidth = (fe->ops.info.type == FE_OFDM) ?
+ params->u.ofdm.bandwidth : 0;
+
+ return 5;
+}
+
+static int simple_dvb_set_params(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *params)
+{
+ struct tuner_simple_priv *priv = fe->tuner_priv;
+ u32 prev_freq, prev_bw;
+ int ret;
+ u8 buf[5];
+
+ if (priv->i2c_props.adap == NULL)
+ return -EINVAL;
+
+ prev_freq = priv->frequency;
+ prev_bw = priv->bandwidth;
+
+ ret = simple_dvb_calc_regs(fe, params, buf, 5);
+ if (ret != 5)
+ goto fail;
+
+ /* put analog demod in standby when tuning digital */
+ if (fe->ops.analog_ops.standby)
+ fe->ops.analog_ops.standby(fe);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ /* buf[0] contains the i2c address, but *
+ * we already have it in i2c_props.addr */
+ ret = tuner_i2c_xfer_send(&priv->i2c_props, buf+1, 4);
+ if (ret != 4)
+ goto fail;
+
+ return 0;
+fail:
+ /* calc_regs sets frequency and bandwidth. if we failed, unset them */
+ priv->frequency = prev_freq;
+ priv->bandwidth = prev_bw;
+
+ return ret;
+}
static int simple_release(struct dvb_frontend *fe)
{
- kfree(fe->tuner_priv);
+ struct tuner_simple_priv *priv = fe->tuner_priv;
+
+ mutex_lock(&tuner_simple_list_mutex);
+
+ if (priv)
+ hybrid_tuner_release_state(priv);
+
+ mutex_unlock(&tuner_simple_list_mutex);
+
fe->tuner_priv = NULL;
return 0;
@@ -707,10 +820,20 @@
return 0;
}
+static int simple_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+ struct tuner_simple_priv *priv = fe->tuner_priv;
+ *bandwidth = priv->bandwidth;
+ return 0;
+}
+
static struct dvb_tuner_ops simple_tuner_ops = {
.set_analog_params = simple_set_params,
+ .set_params = simple_dvb_set_params,
+ .calc_regs = simple_dvb_calc_regs,
.release = simple_release,
.get_frequency = simple_get_frequency,
+ .get_bandwidth = simple_get_bandwidth,
.get_status = simple_get_status,
.get_rf_strength = simple_get_rf_strength,
};
@@ -721,6 +844,7 @@
unsigned int type)
{
struct tuner_simple_priv *priv = NULL;
+ int instance;
if (type >= tuner_count) {
printk(KERN_WARNING "%s: invalid tuner type: %d (max: %d)\n",
@@ -728,22 +852,34 @@
return NULL;
}
- priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
- if (priv == NULL)
+ mutex_lock(&tuner_simple_list_mutex);
+
+ instance = hybrid_tuner_request_state(struct tuner_simple_priv, priv,
+ hybrid_tuner_instance_list,
+ i2c_adap, i2c_addr,
+ "tuner-simple");
+ switch (instance) {
+ case 0:
+ mutex_unlock(&tuner_simple_list_mutex);
return NULL;
- fe->tuner_priv = priv;
+ break;
+ case 1:
+ fe->tuner_priv = priv;
- priv->i2c_props.addr = i2c_addr;
- priv->i2c_props.adap = i2c_adap;
- priv->i2c_props.name = "tuner-simple";
+ priv->type = type;
+ priv->tun = &tuners[type];
+ break;
+ default:
+ fe->tuner_priv = priv;
+ break;
+ }
- priv->type = type;
- priv->tun = &tuners[type];
+ mutex_unlock(&tuner_simple_list_mutex);
memcpy(&fe->ops.tuner_ops, &simple_tuner_ops,
sizeof(struct dvb_tuner_ops));
- tuner_info("type set to %d (%s)\n", priv->type, priv->tun->name);
+ tuner_info("type set to %d (%s)\n", type, priv->tun->name);
strlcpy(fe->ops.tuner_ops.info.name, priv->tun->name,
sizeof(fe->ops.tuner_ops.info.name));
diff --git a/include/media/tuner-types.h b/include/media/tuner-types.h
index b201371..4b5e5cf 100644
--- a/include/media/tuner-types.h
+++ b/include/media/tuner-types.h
@@ -6,10 +6,11 @@
#define __TUNER_TYPES_H__
enum param_type {
- TUNER_PARAM_TYPE_RADIO, \
- TUNER_PARAM_TYPE_PAL, \
- TUNER_PARAM_TYPE_SECAM, \
- TUNER_PARAM_TYPE_NTSC
+ TUNER_PARAM_TYPE_RADIO,
+ TUNER_PARAM_TYPE_PAL,
+ TUNER_PARAM_TYPE_SECAM,
+ TUNER_PARAM_TYPE_NTSC,
+ TUNER_PARAM_TYPE_DIGITAL,
};
struct tuner_range {
@@ -105,6 +106,7 @@
the SECAM-L/L' standards. Range: -16:+15 */
signed int default_top_secam_high:5;
+ u16 iffreq;
unsigned int count;
struct tuner_range *ranges;
@@ -114,6 +116,10 @@
char *name;
unsigned int count;
struct tuner_params *params;
+
+ u16 min;
+ u16 max;
+ u16 stepsize;
};
extern struct tunertype tuners[];