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@xxxxxxxxxxxxxxxxxxxx>
diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index c257da1..5bcce12 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -191,6 +191,9 @@ config RADIO_CADET
To compile this driver as a module, choose M here: the
module will be called radio-cadet.
+config RADIO_LM7000
+ tristate
+
config RADIO_RTRACK
tristate "AIMSlab RadioTrack (aka RadioReveal) support"
depends on ISA && VIDEO_V4L2
diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
index ca8c7d1..7f6aa63 100644
--- a/drivers/media/radio/Makefile
+++ b/drivers/media/radio/Makefile
@@ -28,5 +28,6 @@ obj-$(CONFIG_RADIO_TEF6862) += tef6862.o
obj-$(CONFIG_RADIO_TIMBERDALE) += radio-timb.o
obj-$(CONFIG_RADIO_WL1273) += radio-wl1273.o
obj-$(CONFIG_RADIO_WL128X) += wl128x/
+obj-$(CONFIG_RADIO_LM7000) += lm7000.o
ccflags-y += -Isound
diff --git a/drivers/media/radio/lm7000.c b/drivers/media/radio/lm7000.c
new file mode 100644
index 0000000..681f3af
--- /dev/null
+++ b/drivers/media/radio/lm7000.c
@@ -0,0 +1,52 @@
+/* Sanyo LM7000 tuner chip driver
+ *
+ * Copyright 2012 Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
+ * based on radio-aimslab.c by M. Kirkwood
+ * and radio-sf16fmi.c by M. Kirkwood and Petr Vandrovec
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include "lm7000.h"
+
+MODULE_AUTHOR("Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Routines for Sanyo LM7000 AM/FM radio tuner chip");
+MODULE_LICENSE("GPL");
+
+/* write the 24-bit register, starting with LSB */
+static void lm7000_write(struct lm7000 *lm, u32 val)
+{
+ int i;
+ u8 data;
+
+ for (i = 0; i < 24; i++) {
+ data = val & (1 << i) ? LM7000_DATA : 0;
+ lm->set_pins(lm, data | LM7000_CE);
+ udelay(2);
+ lm->set_pins(lm, data | LM7000_CE | LM7000_CLK);
+ udelay(2);
+ lm->set_pins(lm, data | LM7000_CE);
+ udelay(2);
+ }
+ lm->set_pins(lm, 0);
+}
+
+void lm7000_set_freq(struct lm7000 *lm, u32 freq)
+{
+ freq += 171200; /* Add 10.7 MHz IF */
+ freq /= 400; /* Convert to 25 kHz units */
+ lm7000_write(lm, freq | LM7000_FM_25 | LM7000_BIT_FM);
+}
+EXPORT_SYMBOL(lm7000_set_freq);
+
+static int __init lm7000_module_init(void)
+{
+ return 0;
+}
+
+static void __exit lm7000_module_exit(void)
+{
+}
+
+module_init(lm7000_module_init)
+module_exit(lm7000_module_exit)
diff --git a/drivers/media/radio/lm7000.h b/drivers/media/radio/lm7000.h
new file mode 100644
index 0000000..a5bc7d6
--- /dev/null
+++ b/drivers/media/radio/lm7000.h
@@ -0,0 +1,32 @@
+#ifndef __LM7000_H
+#define __LM7000_H
+
+#define LM7000_DATA (1 << 0)
+#define LM7000_CLK (1 << 1)
+#define LM7000_CE (1 << 2)
+
+#define LM7000_FREQ_MASK 0x3fff
+#define LM7000_BIT_T0 (1 << 14)
+#define LM7000_BIT_T1 (1 << 15)
+#define LM7000_BIT_B0 (1 << 16)
+#define LM7000_BIT_B1 (1 << 17)
+#define LM7000_BIT_B2 (1 << 18)
+#define LM7000_BIT_TB (1 << 19)
+#define LM7000_FM_100 (0 << 20)
+#define LM7000_FM_50 (1 << 20)
+#define LM7000_FM_25 (2 << 20)
+#define LM7000_AM_5 (3 << 20)
+#define LM7000_AM_10 (4 << 20)
+#define LM7000_AM_9 (5 << 20)
+#define LM7000_AM_1 (6 << 20)
+#define LM7000_AM_5_ (7 << 20)
+#define LM7000_BIT_FM (1 << 23)
+
+
+struct lm7000 {
+ void (*set_pins)(struct lm7000 *lm, u8 pins);
+};
+
+void lm7000_set_freq(struct lm7000 *lm, u32 freq);
+
+#endif /* __LM7000_H */
--
Ondrej Zary
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