1 files changed, 55 insertions, 0 deletions
diff --git a/include/media/tuner-types.h b/include/media/tuner-types.h
new file mode 100644
index 00000000000..15821ab14a9
--- /dev/null
+++ b/include/media/tuner-types.h
@@ -0,0 +1,55 @@
+/*
+ * descriptions for simple tuners.
+ */
+
+#ifndef __TUNER_TYPES_H__
+#define __TUNER_TYPES_H__
+
+enum param_type {
+	TUNER_PARAM_TYPE_RADIO, \
+	TUNER_PARAM_TYPE_PAL, \
+	TUNER_PARAM_TYPE_SECAM, \
+	TUNER_PARAM_TYPE_NTSC
+};
+
+struct tuner_range {
+	unsigned short limit;
+	unsigned char cb;
+};
+
+struct tuner_params {
+	enum param_type type;
+	/* Many Philips based tuners have a comment like this in their
+	 * datasheet:
+	 *
+	 *   For channel selection involving band switching, and to ensure
+	 *   smooth tuning to the desired channel without causing
+	 *   unnecessary charge pump action, it is recommended to consider
+	 *   the difference between wanted channel frequency and the
+	 *   current channel frequency.  Unnecessary charge pump action
+	 *   will result in very low tuning voltage which may drive the
+	 *   oscillator to extreme conditions.
+	 *
+	 * Set cb_first_if_lower_freq to 1, if this check is
+	 * required for this tuner.
+	 *
+	 * I tested this for PAL by first setting the TV frequency to
+	 * 203 MHz and then switching to 96.6 MHz FM radio. The result was
+	 * static unless the control byte was sent first.
+	 */
+	unsigned int cb_first_if_lower_freq:1;
+	unsigned char config; /* to be moved into struct tuner_range for dvb-pll merge */
+
+	unsigned int count;
+	struct tuner_range *ranges;
+};
+
+struct tunertype {
+	char *name;
+	struct tuner_params *params;
+};
+
+extern struct tunertype tuners[];
+extern unsigned const int tuner_count;
+
+#endif