143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* RadioTrack II driver
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* Copyright 1998 Ben Pfaff
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*
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* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
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* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
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* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
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*
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* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
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*
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* Fully tested with actual hardware and the v4l2-compliance tool.
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*/
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#include <linux/module.h> /* Modules */
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#include <linux/init.h> /* Initdata */
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#include <linux/ioport.h> /* request_region */
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#include <linux/delay.h> /* udelay */
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#include <linux/videodev2.h> /* kernel radio structs */
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#include <linux/mutex.h>
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#include <linux/io.h> /* outb, outb_p */
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include "radio-isa.h"
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MODULE_AUTHOR("Ben Pfaff");
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MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("0.1.99");
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#ifndef CONFIG_RADIO_RTRACK2_PORT
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#define CONFIG_RADIO_RTRACK2_PORT -1
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#endif
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#define RTRACK2_MAX 2
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static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT,
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[1 ... (RTRACK2_MAX - 1)] = -1 };
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static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 };
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module_param_array(io, int, NULL, 0444);
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MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)");
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module_param_array(radio_nr, int, NULL, 0444);
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MODULE_PARM_DESC(radio_nr, "Radio device numbers");
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static struct radio_isa_card *rtrack2_alloc(void)
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{
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return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL);
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}
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static void zero(struct radio_isa_card *isa)
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{
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outb_p(1, isa->io);
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outb_p(3, isa->io);
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outb_p(1, isa->io);
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}
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static void one(struct radio_isa_card *isa)
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{
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outb_p(5, isa->io);
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outb_p(7, isa->io);
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outb_p(5, isa->io);
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}
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static int rtrack2_s_frequency(struct radio_isa_card *isa, u32 freq)
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{
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int i;
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freq = freq / 200 + 856;
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outb_p(0xc8, isa->io);
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outb_p(0xc9, isa->io);
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outb_p(0xc9, isa->io);
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for (i = 0; i < 10; i++)
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zero(isa);
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for (i = 14; i >= 0; i--)
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if (freq & (1 << i))
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one(isa);
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else
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zero(isa);
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outb_p(0xc8, isa->io);
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outb_p(v4l2_ctrl_g_ctrl(isa->mute), isa->io);
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return 0;
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}
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static u32 rtrack2_g_signal(struct radio_isa_card *isa)
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{
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/* bit set = no signal present */
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return (inb(isa->io) & 2) ? 0 : 0xffff;
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}
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static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
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{
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outb(mute, isa->io);
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return 0;
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}
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static const struct radio_isa_ops rtrack2_ops = {
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.alloc = rtrack2_alloc,
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.s_mute_volume = rtrack2_s_mute_volume,
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.s_frequency = rtrack2_s_frequency,
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.g_signal = rtrack2_g_signal,
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};
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static const int rtrack2_ioports[] = { 0x20f, 0x30f };
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static struct radio_isa_driver rtrack2_driver = {
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.driver = {
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.match = radio_isa_match,
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.probe = radio_isa_probe,
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.remove = radio_isa_remove,
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.driver = {
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.name = "radio-rtrack2",
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},
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},
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.io_params = io,
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.radio_nr_params = radio_nr,
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.io_ports = rtrack2_ioports,
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.num_of_io_ports = ARRAY_SIZE(rtrack2_ioports),
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.region_size = 4,
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.card = "AIMSlab RadioTrack II",
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.ops = &rtrack2_ops,
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.has_stereo = true,
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};
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static int __init rtrack2_init(void)
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{
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return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX);
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}
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static void __exit rtrack2_exit(void)
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{
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isa_unregister_driver(&rtrack2_driver.driver);
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}
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module_init(rtrack2_init);
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module_exit(rtrack2_exit);
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