aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/tea5761.c
blob: 4d2d3ef0860c5ebd9eeebebeefaa6c74329deb3a (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
/*
 * For Philips TEA5761 FM Chip
 * I2C address is allways 0x20 (0x10 at 7-bit mode).
 *
 * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
 * This code is placed under the terms of the GNUv2 General Public License
 *
 */

#include <linux/i2c.h>
#include <linux/videodev.h>
#include <linux/delay.h>
#include <media/tuner.h>
#include <media/tuner.h>

#define PREFIX "TEA5761 "

/* from tuner-core.c */
extern int tuner_debug;

/*****************************************************************************/

/***************************
 * TEA5761HN I2C registers *
 ***************************/

/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */

	/* first byte for reading */
#define TEA5761_INTREG_IFFLAG		0x10
#define TEA5761_INTREG_LEVFLAG		0x8
#define TEA5761_INTREG_FRRFLAG		0x2
#define TEA5761_INTREG_BLFLAG		0x1

	/* second byte for reading / byte for writing */
#define TEA5761_INTREG_IFMSK		0x10
#define TEA5761_INTREG_LEVMSK		0x8
#define TEA5761_INTREG_FRMSK		0x2
#define TEA5761_INTREG_BLMSK		0x1

/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */

	/* First byte */
#define TEA5761_FRQSET_SEARCH_UP 0x80		/* 1=Station search from botton to up */
#define TEA5761_FRQSET_SEARCH_MODE 0x40		/* 1=Search mode */

	/* Bits 0-5 for divider MSB */

	/* Second byte */
	/* Bits 0-7 for divider LSB */

/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */

	/* first byte */

#define TEA5761_TNCTRL_PUPD_0	0x40	/* Power UP/Power Down MSB */
#define TEA5761_TNCTRL_BLIM	0X20	/* 1= Japan Frequencies, 0= European frequencies */
#define TEA5761_TNCTRL_SWPM	0x10	/* 1= software port is FRRFLAG */
#define TEA5761_TNCTRL_IFCTC	0x08	/* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
#define TEA5761_TNCTRL_AFM	0x04
#define TEA5761_TNCTRL_SMUTE	0x02	/* 1= Soft mute */
#define TEA5761_TNCTRL_SNC	0x01

	/* second byte */

#define TEA5761_TNCTRL_MU	0x80	/* 1=Hard mute */
#define TEA5761_TNCTRL_SSL_1	0x40
#define TEA5761_TNCTRL_SSL_0	0x20
#define TEA5761_TNCTRL_HLSI	0x10
#define TEA5761_TNCTRL_MST	0x08	/* 1 = mono */
#define TEA5761_TNCTRL_SWP	0x04
#define TEA5761_TNCTRL_DTC	0x02	/* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
#define TEA5761_TNCTRL_AHLSI	0x01

/* FRQCHECK - Read: bytes 6 and 7  */
	/* First byte */

	/* Bits 0-5 for divider MSB */

	/* Second byte */
	/* Bits 0-7 for divider LSB */

/* TUNCHECK - Read: bytes 8 and 9  */

	/* First byte */
#define TEA5761_TUNCHECK_IF_MASK	0x7e	/* IF count */
#define TEA5761_TUNCHECK_TUNTO		0x01

	/* Second byte */
#define TEA5761_TUNCHECK_LEV_MASK	0xf0	/* Level Count */
#define TEA5761_TUNCHECK_LD		0x08
#define TEA5761_TUNCHECK_STEREO		0x04

/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */

	/* All zero = no test mode */

/* MANID - Read: bytes 12 and 13 */

	/* First byte - should be 0x10 */
#define TEA5767_MANID_VERSION_MASK	0xf0	/* Version = 1 */
#define TEA5767_MANID_ID_MSB_MASK	0x0f	/* Manufacurer ID - should be 0 */

	/* Second byte - Should be 0x2b */

#define TEA5767_MANID_ID_LSB_MASK	0xfe	/* Manufacturer ID - should be 0x15 */
#define TEA5767_MANID_IDAV		0x01	/* 1 = Chip has ID, 0 = Chip has no ID */

/* Chip ID - Read: bytes 14 and 15 */

	/* First byte - should be 0x57 */

	/* Second byte - should be 0x61 */

/*****************************************************************************/

static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	tuner_warn("This tuner doesn't support TV freq.\n");
}

#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
static void tea5761_status_dump(unsigned char *buffer)
{
	unsigned int div, frq;

	div = ((buffer[2] & 0x3f) << 8) | buffer[3];

	frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4;	/* Freq in KHz */

	printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
	       frq / 1000, frq % 1000, div);
}

/* Freq should be specifyed at 62.5 Hz */
static void set_radio_freq(struct i2c_client *c, unsigned int frq)
{
	struct tuner *t = i2c_get_clientdata(c);
	unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
	unsigned div;
	int rc;

	tuner_dbg (PREFIX "radio freq counter %d\n", frq);

	if (t->mode == T_STANDBY) {
		tuner_dbg("TEA5761 set to standby mode\n");
		buffer[5] |= TEA5761_TNCTRL_MU;
	} else {
		buffer[4] |= TEA5761_TNCTRL_PUPD_0;
	}


	if (t->audmode == V4L2_TUNER_MODE_MONO) {
		tuner_dbg("TEA5761 set to mono\n");
		buffer[5] |= TEA5761_TNCTRL_MST;
;
	} else {
		tuner_dbg("TEA5761 set to stereo\n");
	}

	div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
	buffer[1] = (div >> 8) & 0x3f;
	buffer[2] = div & 0xff;

	if (tuner_debug)
		tea5761_status_dump(buffer);

	if (7 != (rc = i2c_master_send(c, buffer, 7)))
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
}

static int tea5761_signal(struct i2c_client *c)
{
	unsigned char buffer[16];
	int rc;
	struct tuner *t = i2c_get_clientdata(c);

	memset(buffer, 0, sizeof(buffer));
	if (16 != (rc = i2c_master_recv(c, buffer, 16)))
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

	return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
}

static int tea5761_stereo(struct i2c_client *c)
{
	unsigned char buffer[16];
	int rc;
	struct tuner *t = i2c_get_clientdata(c);

	memset(buffer, 0, sizeof(buffer));
	if (16 != (rc = i2c_master_recv(c, buffer, 16)))
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

	rc = buffer[9] & TEA5761_TUNCHECK_STEREO;

	tuner_dbg("TEA5761 radio ST GET = %02x\n", rc);

	return (rc ? V4L2_TUNER_SUB_STEREO : 0);
}

int tea5761_autodetection(struct i2c_client *c)
{
	unsigned char buffer[16];
	int rc;
	struct tuner *t = i2c_get_clientdata(c);

	if (16 != (rc = i2c_master_recv(c, buffer, 16))) {
		tuner_warn("it is not a TEA5761. Received %i chars.\n", rc);
		return EINVAL;
	}

	if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) {
		tuner_warn("Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]);
		return EINVAL;
	}
	tuner_warn("TEA5761 detected.\n");
	return 0;
}

int tea5761_tuner_init(struct i2c_client *c)
{
	struct tuner *t = i2c_get_clientdata(c);

	if (tea5761_autodetection(c) == EINVAL)
		return EINVAL;

	tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio");
	strlcpy(c->name, "tea5761", sizeof(c->name));

	t->set_tv_freq = set_tv_freq;
	t->set_radio_freq = set_radio_freq;
	t->has_signal = tea5761_signal;
	t->is_stereo = tea5761_stereo;

	return (0);
}