On Tuesday 12 June 2012 22:17:43 Hans Verkuil wrote:
> 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.
Thanks for idea, it will simplify this a lot. Will resend updated patches.
> Otherwise it looks fine.
>
> Regards,
>
> Hans
>
> > 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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