[PATCH v2 1/3] radio: Add Sanyo LM7000 tuner driver

[PATCH v2 1/3] radio: Add Sanyo LM7000 tuner driver

[Ondrej Zary]

Add very simple driver for Sanyo LM7000 AM/FM tuner chip. Only FM is supported
as there is no known HW with AM implemented.

This will be used by radio-aimslab and radio-sf16fmi.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>

diff --git a/drivers/media/radio/lm7000.h b/drivers/media/radio/lm7000.h
new file mode 100644
index 0000000..139cd6b
--- /dev/null
+++ b/drivers/media/radio/lm7000.h
@@ -0,0 +1,43 @@
+#ifndef __LM7000_H
+#define __LM7000_H
+
+/* Sanyo LM7000 tuner chip control
+ *
+ * Copyright 2012 Ondrej Zary <linux@rainbow-software.org>
+ * based on radio-aimslab.c by M. Kirkwood
+ * and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec
+ */
+
+#define LM7000_DATA	(1 << 0)
+#define LM7000_CLK	(1 << 1)
+#define LM7000_CE	(1 << 2)
+
+#define LM7000_FM_100	(0 << 20)
+#define LM7000_FM_50	(1 << 20)
+#define LM7000_FM_25	(2 << 20)
+#define LM7000_BIT_FM	(1 << 23)
+
+static inline void lm7000_set_freq(u32 freq, void *handle,
+				void (*set_pins)(void *handle, u8 pins))
+{
+	int i;
+	u8 data;
+	u32 val;
+
+	freq += 171200;		/* Add 10.7 MHz IF */
+	freq /= 400;		/* Convert to 25 kHz units */
+	val = freq | LM7000_FM_25 | LM7000_BIT_FM;
+	/* write the 24-bit register, starting with LSB */
+	for (i = 0; i < 24; i++) {
+		data = val & (1 << i) ? LM7000_DATA : 0;
+		set_pins(handle, data | LM7000_CE);
+		udelay(2);
+		set_pins(handle, data | LM7000_CE | LM7000_CLK);
+		udelay(2);
+		set_pins(handle, data | LM7000_CE);
+		udelay(2);
+	}
+	set_pins(handle, 0);
+}
+
+#endif /* __LM7000_H */



-- 
Ondrej Zary

Re: [PATCH v2 1/3] radio: Add Sanyo LM7000 tuner driver

[Hans Verkuil]

On Wed June 13 2012 23:25:32 Ondrej Zary wrote:
> Add very simple driver for Sanyo LM7000 AM/FM tuner chip. Only FM is supported
> as there is no known HW with AM implemented.
> 
> This will be used by radio-aimslab and radio-sf16fmi.
> 
> Signed-off-by: Ondrej Zary <linux@rainbow-software.org>

For all three patches:

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

Thanks!

	Hans

> 
> diff --git a/drivers/media/radio/lm7000.h b/drivers/media/radio/lm7000.h
> new file mode 100644
> index 0000000..139cd6b
> --- /dev/null
> +++ b/drivers/media/radio/lm7000.h
> @@ -0,0 +1,43 @@
> +#ifndef __LM7000_H
> +#define __LM7000_H
> +
> +/* Sanyo LM7000 tuner chip control
> + *
> + * Copyright 2012 Ondrej Zary <linux@rainbow-software.org>
> + * based on radio-aimslab.c by M. Kirkwood
> + * and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec
> + */
> +
> +#define LM7000_DATA	(1 << 0)
> +#define LM7000_CLK	(1 << 1)
> +#define LM7000_CE	(1 << 2)
> +
> +#define LM7000_FM_100	(0 << 20)
> +#define LM7000_FM_50	(1 << 20)
> +#define LM7000_FM_25	(2 << 20)
> +#define LM7000_BIT_FM	(1 << 23)
> +
> +static inline void lm7000_set_freq(u32 freq, void *handle,
> +				void (*set_pins)(void *handle, u8 pins))
> +{
> +	int i;
> +	u8 data;
> +	u32 val;
> +
> +	freq += 171200;		/* Add 10.7 MHz IF */
> +	freq /= 400;		/* Convert to 25 kHz units */
> +	val = freq | LM7000_FM_25 | LM7000_BIT_FM;
> +	/* write the 24-bit register, starting with LSB */
> +	for (i = 0; i < 24; i++) {
> +		data = val & (1 << i) ? LM7000_DATA : 0;
> +		set_pins(handle, data | LM7000_CE);
> +		udelay(2);
> +		set_pins(handle, data | LM7000_CE | LM7000_CLK);
> +		udelay(2);
> +		set_pins(handle, data | LM7000_CE);
> +		udelay(2);
> +	}
> +	set_pins(handle, 0);
> +}
> +
> +#endif /* __LM7000_H */
> 
> 
> 
>