summaryrefslogtreecommitdiffstats
path: root/drivers/media/radio/radio-trust.c
blob: 2fc009509c7c338950f3824f320f37621f5e1b9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
// SPDX-License-Identifier: GPL-2.0-only
/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
 * by Eric Lammerts <eric@scintilla.utwente.nl>
 *
 * Based on radio-aztech.c. Original notes:
 *
 * 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)
 *
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
 */

#include <stdarg.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/videodev2.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include "radio-isa.h"

MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.1.99");

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

#ifndef CONFIG_RADIO_TRUST_PORT
#define CONFIG_RADIO_TRUST_PORT -1
#endif

#define TRUST_MAX 2

static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT,
			      [1 ... (TRUST_MAX - 1)] = -1 };
static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 };

module_param_array(io, int, NULL, 0444);
MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)");
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(radio_nr, "Radio device numbers");

struct trust {
	struct radio_isa_card isa;
	int ioval;
};

static struct radio_isa_card *trust_alloc(void)
{
	struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL);

	return tr ? &tr->isa : NULL;
}

/* i2c addresses */
#define TDA7318_ADDR 0x88
#define TSA6060T_ADDR 0xc4

#define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0)
#define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io)
#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io)
#define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io)
#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io)

static void write_i2c(struct trust *tr, int n, ...)
{
	unsigned char val, mask;
	va_list args;

	va_start(args, n);

	/* start condition */
	TR_SET_SDA;
	TR_SET_SCL;
	TR_DELAY;
	TR_CLR_SDA;
	TR_CLR_SCL;
	TR_DELAY;

	for (; n; n--) {
		val = va_arg(args, unsigned);
		for (mask = 0x80; mask; mask >>= 1) {
			if (val & mask)
				TR_SET_SDA;
			else
				TR_CLR_SDA;
			TR_SET_SCL;
			TR_DELAY;
			TR_CLR_SCL;
			TR_DELAY;
		}
		/* acknowledge bit */
		TR_SET_SDA;
		TR_SET_SCL;
		TR_DELAY;
		TR_CLR_SCL;
		TR_DELAY;
	}

	/* stop condition */
	TR_CLR_SDA;
	TR_DELAY;
	TR_SET_SCL;
	TR_DELAY;
	TR_SET_SDA;
	TR_DELAY;

	va_end(args);
}

static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
{
	struct trust *tr = container_of(isa, struct trust, isa);

	tr->ioval = (tr->ioval & 0xf7) | (mute << 3);
	outb(tr->ioval, isa->io);
	write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f);
	return 0;
}

static int trust_s_stereo(struct radio_isa_card *isa, bool stereo)
{
	struct trust *tr = container_of(isa, struct trust, isa);

	tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2);
	outb(tr->ioval, isa->io);
	return 0;
}

static u32 trust_g_signal(struct radio_isa_card *isa)
{
	int i, v;

	for (i = 0, v = 0; i < 100; i++)
		v |= inb(isa->io);
	return (v & 1) ? 0 : 0xffff;
}

static int trust_s_frequency(struct radio_isa_card *isa, u32 freq)
{
	struct trust *tr = container_of(isa, struct trust, isa);

	freq /= 160;	/* Convert to 10 kHz units	*/
	freq += 1070;	/* Add 10.7 MHz IF		*/
	write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1,
			freq >> 7, 0x60 | ((freq >> 15) & 1), 0);
	return 0;
}

static int basstreble2chip[15] = {
	0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
};

static int trust_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct radio_isa_card *isa =
		container_of(ctrl->handler, struct radio_isa_card, hdl);
	struct trust *tr = container_of(isa, struct trust, isa);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_BASS:
		write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]);
		return 0;
	case V4L2_CID_AUDIO_TREBLE:
		write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]);
		return 0;
	}
	return -EINVAL;
}

static const struct v4l2_ctrl_ops trust_ctrl_ops = {
	.s_ctrl = trust_s_ctrl,
};

static int trust_initialize(struct radio_isa_card *isa)
{
	struct trust *tr = container_of(isa, struct trust, isa);

	tr->ioval = 0xf;
	write_i2c(tr, 2, TDA7318_ADDR, 0x80);	/* speaker att. LF = 0 dB */
	write_i2c(tr, 2, TDA7318_ADDR, 0xa0);	/* speaker att. RF = 0 dB */
	write_i2c(tr, 2, TDA7318_ADDR, 0xc0);	/* speaker att. LR = 0 dB */
	write_i2c(tr, 2, TDA7318_ADDR, 0xe0);	/* speaker att. RR = 0 dB */
	write_i2c(tr, 2, TDA7318_ADDR, 0x40);	/* stereo 1 input, gain = 18.75 dB */

	v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
				V4L2_CID_AUDIO_BASS, 0, 15, 1, 8);
	v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
				V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8);
	return isa->hdl.error;
}

static const struct radio_isa_ops trust_ops = {
	.init = trust_initialize,
	.alloc = trust_alloc,
	.s_mute_volume = trust_s_mute_volume,
	.s_frequency = trust_s_frequency,
	.s_stereo = trust_s_stereo,
	.g_signal = trust_g_signal,
};

static const int trust_ioports[] = { 0x350, 0x358 };

static struct radio_isa_driver trust_driver = {
	.driver = {
		.match		= radio_isa_match,
		.probe		= radio_isa_probe,
		.remove		= radio_isa_remove,
		.driver		= {
			.name	= "radio-trust",
		},
	},
	.io_params = io,
	.radio_nr_params = radio_nr,
	.io_ports = trust_ioports,
	.num_of_io_ports = ARRAY_SIZE(trust_ioports),
	.region_size = 2,
	.card = "Trust FM Radio",
	.ops = &trust_ops,
	.has_stereo = true,
	.max_volume = 31,
};

static int __init trust_init(void)
{
	return isa_register_driver(&trust_driver.driver, TRUST_MAX);
}

static void __exit trust_exit(void)
{
	isa_unregister_driver(&trust_driver.driver);
}

module_init(trust_init);
module_exit(trust_exit);