1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * RadioTrack II driver |
4 | * Copyright 1998 Ben Pfaff |
5 | * |
6 | * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood |
7 | * 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 | |
28 | MODULE_AUTHOR("Ben Pfaff" ); |
29 | MODULE_DESCRIPTION("A driver for the RadioTrack II radio card." ); |
30 | MODULE_LICENSE("GPL" ); |
31 | MODULE_VERSION("0.1.99" ); |
32 | |
33 | #ifndef CONFIG_RADIO_RTRACK2_PORT |
34 | #define CONFIG_RADIO_RTRACK2_PORT -1 |
35 | #endif |
36 | |
37 | #define RTRACK2_MAX 2 |
38 | |
39 | static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT, |
40 | [1 ... (RTRACK2_MAX - 1)] = -1 }; |
41 | static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 }; |
42 | |
43 | module_param_array(io, int, NULL, 0444); |
44 | MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)" ); |
45 | module_param_array(radio_nr, int, NULL, 0444); |
46 | MODULE_PARM_DESC(radio_nr, "Radio device numbers" ); |
47 | |
48 | static struct radio_isa_card *rtrack2_alloc(void) |
49 | { |
50 | return kzalloc(size: sizeof(struct radio_isa_card), GFP_KERNEL); |
51 | } |
52 | |
53 | static void zero(struct radio_isa_card *isa) |
54 | { |
55 | outb_p(value: 1, port: isa->io); |
56 | outb_p(value: 3, port: isa->io); |
57 | outb_p(value: 1, port: isa->io); |
58 | } |
59 | |
60 | static void one(struct radio_isa_card *isa) |
61 | { |
62 | outb_p(value: 5, port: isa->io); |
63 | outb_p(value: 7, port: isa->io); |
64 | outb_p(value: 5, port: isa->io); |
65 | } |
66 | |
67 | static 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(value: 0xc8, port: isa->io); |
74 | outb_p(value: 0xc9, port: isa->io); |
75 | outb_p(value: 0xc9, port: 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 | else |
84 | zero(isa); |
85 | |
86 | outb_p(value: 0xc8, port: isa->io); |
87 | outb_p(value: v4l2_ctrl_g_ctrl(ctrl: isa->mute), port: isa->io); |
88 | return 0; |
89 | } |
90 | |
91 | static u32 rtrack2_g_signal(struct radio_isa_card *isa) |
92 | { |
93 | /* bit set = no signal present */ |
94 | return (inb(port: isa->io) & 2) ? 0 : 0xffff; |
95 | } |
96 | |
97 | static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
98 | { |
99 | outb(value: mute, port: isa->io); |
100 | return 0; |
101 | } |
102 | |
103 | static 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 | |
110 | static const int rtrack2_ioports[] = { 0x20f, 0x30f }; |
111 | |
112 | static 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 | |
131 | static int __init rtrack2_init(void) |
132 | { |
133 | return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX); |
134 | } |
135 | |
136 | static void __exit rtrack2_exit(void) |
137 | { |
138 | isa_unregister_driver(&rtrack2_driver.driver); |
139 | } |
140 | |
141 | module_init(rtrack2_init); |
142 | module_exit(rtrack2_exit); |
143 | |