Hi Ondrej!
On Tue June 12 2012 20:37:54 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.
It feels to me that it is overkill to turn this into a full blown module.
Can't this be done as a single lm7000.h header that contains a single
static inline function like this:
static inline void lm7000_set_freq(u32 freq, void *handle,
void (*set_pins)(void *handle,
u8 pins))
{
...
}
It does the job just as well.
Otherwise it looks fine.
Regards,
Hans
> This will be used by radio-aimslab and radio-sf16fmi.
>
> Signed-off-by: Ondrej Zary <li...@rainbow-software.org>
>
> 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 <li...@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 <li...@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 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 */
>
>
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