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authorOndrej Zary <linux@rainbow-software.org>2012-06-12 14:37:54 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-06-21 12:12:03 -0300
commit4ecbb69414c61af3594209e081d6e834ea68a16d (patch)
tree3af05249ef46680174185336c5dd200d724eb511
parent61bdbef063d2300f706133e677c61a1bec097ff8 (diff)
[media] radio: Add Sanyo LM7000 tuner driver
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> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/radio/Kconfig3
-rw-r--r--drivers/media/radio/Makefile1
-rw-r--r--drivers/media/radio/lm7000.c52
-rw-r--r--drivers/media/radio/lm7000.h32
4 files changed, 88 insertions, 0 deletions
diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index c257da13d766..5bcce129d718 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 ca8c7d134b95..7f6aa63117c0 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 000000000000..681f3af89260
--- /dev/null
+++ b/drivers/media/radio/lm7000.c
@@ -0,0 +1,52 @@
+/* Sanyo LM7000 tuner chip driver
+ *
+ * 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
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include "lm7000.h"
+
+MODULE_AUTHOR("Ondrej Zary <linux@rainbow-software.org>");
+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 000000000000..a5bc7d632f1d
--- /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 */