linux/drivers/media/radio/radio-aztech.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * radio-aztech.c - Aztech radio card driver
 *
 * Converted to the radio-isa framework by Hans Verkuil <[email protected]>
 * Converted to V4L2 API by Mauro Carvalho Chehab <[email protected]>
 * Adapted to support the Video for Linux API by
 * Russell Kroll <[email protected]>.  Based on original tuner code by:
 *
 * Quay Ly
 * Donald Song
 * Jason Lewis      ([email protected])
 * Scott McGrath    ([email protected])
 * William McGrath  ([email protected])
 *
 * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
*/

#include <linux/module.h>	/* Modules			*/
#include <linux/init.h>		/* Initdata			*/
#include <linux/ioport.h>	/* request_region		*/
#include <linux/delay.h>	/* udelay			*/
#include <linux/videodev2.h>	/* kernel radio structs		*/
#include <linux/io.h>		/* outb, outb_p			*/
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include "radio-isa.h"
#include "lm7000.h"

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_VERSION(…) …;

/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
#ifndef CONFIG_RADIO_AZTECH_PORT
#define CONFIG_RADIO_AZTECH_PORT …
#endif

#define AZTECH_MAX …

static int io[AZTECH_MAX] = …;
static int radio_nr[AZTECH_MAX]	= …;

module_param_array(…);
MODULE_PARM_DESC(…) …;
module_param_array(…);
MODULE_PARM_DESC(…) …;

struct aztech { … };

/* bit definitions for register read */
#define AZTECH_BIT_NOT_TUNED …
#define AZTECH_BIT_MONO …
/* bit definitions for register write */
#define AZTECH_BIT_TUN_CE …
#define AZTECH_BIT_TUN_CLK …
#define AZTECH_BIT_TUN_DATA …
/* bits 0 and 2 are volume control, bits 3..5 are not connected */

static void aztech_set_pins(void *handle, u8 pins)
{ … }

static struct radio_isa_card *aztech_alloc(void)
{ … }

static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
{ … }

static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
{ … }

static u32 aztech_g_signal(struct radio_isa_card *isa)
{ … }

static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
{ … }

static const struct radio_isa_ops aztech_ops = …;

static const int aztech_ioports[] = …;

static struct radio_isa_driver aztech_driver = …;

static int __init aztech_init(void)
{ … }

static void __exit aztech_exit(void)
{ … }

module_init(…) …;
module_exit(aztech_exit);