143 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * RadioTrack II driver4 * Copyright 1998 Ben Pfaff5 *6 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood7 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>8 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>9 *10 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>11 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>12 *13 * Fully tested with actual hardware and the v4l2-compliance tool.14 */15 16#include <linux/module.h> /* Modules */17#include <linux/init.h> /* Initdata */18#include <linux/ioport.h> /* request_region */19#include <linux/delay.h> /* udelay */20#include <linux/videodev2.h> /* kernel radio structs */21#include <linux/mutex.h>22#include <linux/io.h> /* outb, outb_p */23#include <linux/slab.h>24#include <media/v4l2-device.h>25#include <media/v4l2-ioctl.h>26#include "radio-isa.h"27 28MODULE_AUTHOR("Ben Pfaff");29MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");30MODULE_LICENSE("GPL");31MODULE_VERSION("0.1.99");32 33#ifndef CONFIG_RADIO_RTRACK2_PORT34#define CONFIG_RADIO_RTRACK2_PORT -135#endif36 37#define RTRACK2_MAX 238 39static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT,40 [1 ... (RTRACK2_MAX - 1)] = -1 };41static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 };42 43module_param_array(io, int, NULL, 0444);44MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)");45module_param_array(radio_nr, int, NULL, 0444);46MODULE_PARM_DESC(radio_nr, "Radio device numbers");47 48static struct radio_isa_card *rtrack2_alloc(void)49{50 return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL);51}52 53static void zero(struct radio_isa_card *isa)54{55 outb_p(1, isa->io);56 outb_p(3, isa->io);57 outb_p(1, isa->io);58}59 60static void one(struct radio_isa_card *isa)61{62 outb_p(5, isa->io);63 outb_p(7, isa->io);64 outb_p(5, isa->io);65}66 67static int rtrack2_s_frequency(struct radio_isa_card *isa, u32 freq)68{69 int i;70 71 freq = freq / 200 + 856;72 73 outb_p(0xc8, isa->io);74 outb_p(0xc9, isa->io);75 outb_p(0xc9, isa->io);76 77 for (i = 0; i < 10; i++)78 zero(isa);79 80 for (i = 14; i >= 0; i--)81 if (freq & (1 << i))82 one(isa);83 else84 zero(isa);85 86 outb_p(0xc8, isa->io);87 outb_p(v4l2_ctrl_g_ctrl(isa->mute), isa->io);88 return 0;89}90 91static u32 rtrack2_g_signal(struct radio_isa_card *isa)92{93 /* bit set = no signal present */94 return (inb(isa->io) & 2) ? 0 : 0xffff;95}96 97static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)98{99 outb(mute, isa->io);100 return 0;101}102 103static const struct radio_isa_ops rtrack2_ops = {104 .alloc = rtrack2_alloc,105 .s_mute_volume = rtrack2_s_mute_volume,106 .s_frequency = rtrack2_s_frequency,107 .g_signal = rtrack2_g_signal,108};109 110static const int rtrack2_ioports[] = { 0x20f, 0x30f };111 112static struct radio_isa_driver rtrack2_driver = {113 .driver = {114 .match = radio_isa_match,115 .probe = radio_isa_probe,116 .remove = radio_isa_remove,117 .driver = {118 .name = "radio-rtrack2",119 },120 },121 .io_params = io,122 .radio_nr_params = radio_nr,123 .io_ports = rtrack2_ioports,124 .num_of_io_ports = ARRAY_SIZE(rtrack2_ioports),125 .region_size = 4,126 .card = "AIMSlab RadioTrack II",127 .ops = &rtrack2_ops,128 .has_stereo = true,129};130 131static int __init rtrack2_init(void)132{133 return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX);134}135 136static void __exit rtrack2_exit(void)137{138 isa_unregister_driver(&rtrack2_driver.driver);139}140 141module_init(rtrack2_init);142module_exit(rtrack2_exit);143