diff options
| author | Ondrej Zary <linux@rainbow-software.org> | 2012-06-12 14:37:54 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-06-21 12:12:03 -0300 |
| commit | 4ecbb69414c61af3594209e081d6e834ea68a16d (patch) | |
| tree | 3af05249ef46680174185336c5dd200d724eb511 | |
| parent | 61bdbef063d2300f706133e677c61a1bec097ff8 (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/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/media/radio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/media/radio/lm7000.c | 52 | ||||
| -rw-r--r-- | drivers/media/radio/lm7000.h | 32 |
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 */ |