linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 * radio-aztech.c - Aztech radio card driver

 *

 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>

 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>

 * Adapted to support the Video for Linux API by

 * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:

 *

 * Quay Ly

 * Donald Song

 * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)

 * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)

 * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)

 *

 * 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("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");

MODULE_DESCRIPTION("A driver for the Aztech radio card.");

MODULE_LICENSE("GPL");

MODULE_VERSION("1.0.0");

​

/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */

#ifndef CONFIG_RADIO_AZTECH_PORT

#define CONFIG_RADIO_AZTECH_PORT -1

#endif

​

#define AZTECH_MAX 2

​

static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,

                  [1 ... (AZTECH_MAX - 1)] = -1 };

static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 };

​

module_param_array(io, int, NULL, 0444);

MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");

module_param_array(radio_nr, int, NULL, 0444);

MODULE_PARM_DESC(radio_nr, "Radio device numbers");

​

struct aztech {

    struct radio_isa_card isa;

    int curvol;

};

​

/* bit definitions for register read */

#define AZTECH_BIT_NOT_TUNED    (1 << 0)

#define AZTECH_BIT_MONO     (1 << 1)

/* bit definitions for register write */

#define AZTECH_BIT_TUN_CE   (1 << 1)

#define AZTECH_BIT_TUN_CLK  (1 << 6)