V4L/DVB (6128): hybrid tuner refactoring core changes, phase 1

Prepare tuner-core for conversion of tuner sub-drivers into 
dvb_frontend modules
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Mike Isely <isely@pobox.com>
Acked-by: Steven Toth <stoth@hauppauge.com>
Acked-by: Patrick Boettcher <pb@linuxtv.org>
Acked-by: Jarod Wilson <jwilson@redhat.com>
Acked-by: Oliver Endriss <o.endriss@gmx.de>
Acked-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/dvb-core/dvb_frontend.h

@@ -62,6 +62,13 @@ struct dvb_tuner_info {
 	u32 bandwidth_step;
 };
 
+struct analog_parameters {
+	unsigned int frequency;
+	unsigned int mode;
+	unsigned int audmode;
+	u64 std;
+};
+
 struct dvb_tuner_ops {
 
 	struct dvb_tuner_info info;
@@ -72,6 +79,7 @@ struct dvb_tuner_ops {
 
 	/** This is for simple PLLs - set all parameters in one go. */
 	int (*set_params)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);
+	int (*set_analog_params)(struct dvb_frontend *fe, struct analog_parameters *p);
 
 	/** This is support for demods like the mt352 - fills out the supplied buffer with what to write. */
 	int (*calc_regs)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p, u8 *buf, int buf_len);
@@ -80,6 +88,7 @@ struct dvb_tuner_ops {
 	int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);
 
 #define TUNER_STATUS_LOCKED 1
+#define TUNER_STATUS_STEREO 2
 	int (*get_status)(struct dvb_frontend *fe, u32 *status);
 
 	/** These are provided seperately from set_params in order to facilitate silicon

drivers/media/video/tuner-core.c

@@ -70,6 +70,40 @@ static struct i2c_client client_template;
 
 /* ---------------------------------------------------------------------- */
 
+static void fe_set_freq(struct tuner *t, unsigned int freq)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+	struct analog_parameters params = {
+		.frequency = freq,
+		.mode      = t->mode,
+		.audmode   = t->audmode,
+		.std       = t->std
+	};
+
+	if (NULL == fe_tuner_ops->set_analog_params) {
+		tuner_warn("Tuner frontend module has no way to set freq\n");
+		return;
+	}
+	fe_tuner_ops->set_analog_params(&t->fe, &params);
+}
+
+static void fe_release(struct tuner *t)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+	if (fe_tuner_ops->release)
+		fe_tuner_ops->release(&t->fe);
+}
+
+static void fe_standby(struct tuner *t)
+{
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+	if (fe_tuner_ops->sleep)
+		fe_tuner_ops->sleep(&t->fe);
+}
+
 /* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
 {
@@ -171,6 +205,7 @@ static void set_type(struct i2c_client *c, unsigned int type,
 		     int (*tuner_callback) (void *dev, int command,int arg))
 {
 	struct tuner *t = i2c_get_clientdata(c);
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
 	unsigned char buffer[4];
 
 	if (type == UNSET || type == TUNER_ABSENT) {
@@ -258,6 +293,17 @@ static void set_type(struct i2c_client *c, unsigned int type,
 		break;
 	}
 
+	if (fe_tuner_ops->set_analog_params) {
+		strlcpy(t->i2c.name, fe_tuner_ops->info.name, sizeof(t->i2c.name));
+
+		t->ops.set_tv_freq    = fe_set_freq;
+		t->ops.set_radio_freq = fe_set_freq;
+		t->ops.standby        = fe_standby;
+		t->ops.release        = fe_release;
+	}
+
+	tuner_info("type set to %s\n", t->i2c.name);
+
 	if (t->mode_mask == T_UNINITIALIZED)
 		t->mode_mask = new_mode_mask;
 
@@ -429,6 +475,7 @@ static int tuner_fixup_std(struct tuner *t)
 static void tuner_status(struct tuner *t)
 {
 	unsigned long freq, freq_fraction;
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
 	const char *p;
 
 	switch (t->mode) {
@@ -449,6 +496,15 @@ static void tuner_status(struct tuner *t)
 	tuner_info("Standard:        0x%08lx\n", (unsigned long)t->std);
 	if (t->mode != V4L2_TUNER_RADIO)
 	       return;
+	if (fe_tuner_ops->get_status) {
+		u32 tuner_status;
+
+		fe_tuner_ops->get_status(&t->fe, &tuner_status);
+		if (tuner_status & TUNER_STATUS_LOCKED)
+			tuner_info("Tuner is locked.\n");
+		if (tuner_status & TUNER_STATUS_STEREO)
+			tuner_info("Stereo:          yes\n");
+	}
 	if (t->ops.has_signal) {
 		tuner_info("Signal strength: %d\n", t->ops.has_signal(t));
 	}
@@ -634,6 +690,7 @@ static inline int check_v4l2(struct tuner *t)
 static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 {
 	struct tuner *t = i2c_get_clientdata(client);
+	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
 
 	if (tuner_debug>1)
 		v4l_i2c_print_ioctl(&(t->i2c),cmd);
@@ -720,8 +777,17 @@ static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 				return 0;
 
 			if (V4L2_TUNER_RADIO == t->mode) {
-				if (t->ops.has_signal)
-					vt->signal = t->ops.has_signal(t);
+				if (fe_tuner_ops->get_status) {
+					u32 tuner_status;
+
+					fe_tuner_ops->get_status(&t->fe, &tuner_status);
+						if (tuner_status & TUNER_STATUS_STEREO)
+							vt->flags |= VIDEO_TUNER_STEREO_ON;
+						else
+							vt->flags &= ~VIDEO_TUNER_STEREO_ON;
+						vt->signal = tuner_status & TUNER_STATUS_LOCKED
+							? 65535 : 0;
+				} else {
 					if (t->ops.is_stereo) {
 						if (t->ops.is_stereo(t))
 							vt->flags |=
@@ -730,6 +796,9 @@ static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 							vt->flags &=
 								~VIDEO_TUNER_STEREO_ON;
 					}
+					if (t->ops.has_signal)
+						vt->signal = t->ops.has_signal(t);
+				}
 				vt->flags |= VIDEO_TUNER_LOW;	/* Allow freqs at 62.5 Hz */
 
 				vt->rangelow = radio_range[0] * 16000;
@@ -751,9 +820,17 @@ static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 			if (check_v4l2(t) == EINVAL)
 				return 0;
 
-			if (V4L2_TUNER_RADIO == t->mode && t->ops.is_stereo)
+			if (V4L2_TUNER_RADIO == t->mode) {
+				if (fe_tuner_ops->get_status) {
+					u32 tuner_status;
+
+					fe_tuner_ops->get_status(&t->fe, &tuner_status);
+					va->mode = (tuner_status & TUNER_STATUS_STEREO)
+					    ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
+				} else if (t->ops.is_stereo)
 					va->mode = t->ops.is_stereo(t)
 					    ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
+			}
 			return 0;
 		}
 #endif
@@ -804,6 +881,15 @@ static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 				return 0;
 			switch_v4l2();
 			f->type = t->mode;
+			if (fe_tuner_ops->get_frequency) {
+				u32 abs_freq;
+
+				fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
+				f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
+					(abs_freq * 2 + 125/2) / 125 :
+					(abs_freq + 62500/2) / 62500;
+				break;
+			}
 			f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
 				t->radio_freq : t->tv_freq;
 			break;
@@ -828,16 +914,23 @@ static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 			}
 
 			/* radio mode */
-			if (t->ops.has_signal)
-				tuner->signal = t->ops.has_signal(t);
-
 			tuner->rxsubchans =
 				V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+			if (fe_tuner_ops->get_status) {
+				u32 tuner_status;
+
+				fe_tuner_ops->get_status(&t->fe, &tuner_status);
+				tuner->rxsubchans = (tuner_status & TUNER_STATUS_STEREO) ?
+					V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
+				tuner->signal = tuner_status & TUNER_STATUS_LOCKED ? 65535 : 0;
+			} else {
 				if (t->ops.is_stereo) {
 					tuner->rxsubchans = t->ops.is_stereo(t) ?
 						V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
 				}
-
+				if (t->ops.has_signal)
+					tuner->signal = t->ops.has_signal(t);
+			}
 			tuner->capability |=
 			    V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 			tuner->audmode = t->audmode;

drivers/media/video/tuner-driver.h

@@ -25,6 +25,7 @@
 #include <linux/videodev2.h>
 #include <linux/i2c.h>
 #include "tuner-i2c.h"
+#include "dvb_frontend.h"
 
 extern unsigned const int tuner_count;
 
@@ -58,6 +59,8 @@ struct tuner {
 	int          using_v4l2;
 	void *priv;
 
+	struct dvb_frontend fe;
+
 	/* used by tda9887 */
 	unsigned int       tda9887_config;