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