1/*
2 * RadioTrack II driver
3 * Copyright 1998 Ben Pfaff
4 *
5 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
6 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
7 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
8 *
9 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
10 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
11 *
12 * Fully tested with actual hardware and the v4l2-compliance tool.
13 */
14
15#include <linux/module.h>	/* Modules 			*/
16#include <linux/init.h>		/* Initdata			*/
17#include <linux/ioport.h>	/* request_region		*/
18#include <linux/delay.h>	/* udelay			*/
19#include <linux/videodev2.h>	/* kernel radio structs		*/
20#include <linux/mutex.h>
21#include <linux/io.h>		/* outb, outb_p			*/
22#include <linux/slab.h>
23#include <media/v4l2-device.h>
24#include <media/v4l2-ioctl.h>
25#include "radio-isa.h"
26
27MODULE_AUTHOR("Ben Pfaff");
28MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
29MODULE_LICENSE("GPL");
30MODULE_VERSION("0.1.99");
31
32#ifndef CONFIG_RADIO_RTRACK2_PORT
33#define CONFIG_RADIO_RTRACK2_PORT -1
34#endif
35
36#define RTRACK2_MAX 2
37
38static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT,
39			      [1 ... (RTRACK2_MAX - 1)] = -1 };
40static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 };
41
42module_param_array(io, int, NULL, 0444);
43MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)");
44module_param_array(radio_nr, int, NULL, 0444);
45MODULE_PARM_DESC(radio_nr, "Radio device numbers");
46
47static struct radio_isa_card *rtrack2_alloc(void)
48{
49	return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL);
50}
51
52static void zero(struct radio_isa_card *isa)
53{
54	outb_p(1, isa->io);
55	outb_p(3, isa->io);
56	outb_p(1, isa->io);
57}
58
59static void one(struct radio_isa_card *isa)
60{
61	outb_p(5, isa->io);
62	outb_p(7, isa->io);
63	outb_p(5, isa->io);
64}
65
66static int rtrack2_s_frequency(struct radio_isa_card *isa, u32 freq)
67{
68	int i;
69
70	freq = freq / 200 + 856;
71
72	outb_p(0xc8, isa->io);
73	outb_p(0xc9, isa->io);
74	outb_p(0xc9, isa->io);
75
76	for (i = 0; i < 10; i++)
77		zero(isa);
78
79	for (i = 14; i >= 0; i--)
80		if (freq & (1 << i))
81			one(isa);
82		else
83			zero(isa);
84
85	outb_p(0xc8, isa->io);
86	outb_p(v4l2_ctrl_g_ctrl(isa->mute), isa->io);
87	return 0;
88}
89
90static u32 rtrack2_g_signal(struct radio_isa_card *isa)
91{
92	/* bit set = no signal present	*/
93	return (inb(isa->io) & 2) ? 0 : 0xffff;
94}
95
96static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
97{
98	outb(mute, isa->io);
99	return 0;
100}
101
102static const struct radio_isa_ops rtrack2_ops = {
103	.alloc = rtrack2_alloc,
104	.s_mute_volume = rtrack2_s_mute_volume,
105	.s_frequency = rtrack2_s_frequency,
106	.g_signal = rtrack2_g_signal,
107};
108
109static const int rtrack2_ioports[] = { 0x20f, 0x30f };
110
111static struct radio_isa_driver rtrack2_driver = {
112	.driver = {
113		.match		= radio_isa_match,
114		.probe		= radio_isa_probe,
115		.remove		= radio_isa_remove,
116		.driver		= {
117			.name	= "radio-rtrack2",
118		},
119	},
120	.io_params = io,
121	.radio_nr_params = radio_nr,
122	.io_ports = rtrack2_ioports,
123	.num_of_io_ports = ARRAY_SIZE(rtrack2_ioports),
124	.region_size = 4,
125	.card = "AIMSlab RadioTrack II",
126	.ops = &rtrack2_ops,
127	.has_stereo = true,
128};
129
130static int __init rtrack2_init(void)
131{
132	return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX);
133}
134
135static void __exit rtrack2_exit(void)
136{
137	isa_unregister_driver(&rtrack2_driver.driver);
138}
139
140module_init(rtrack2_init);
141module_exit(rtrack2_exit);
142