2 * For Philips TEA5761 FM Chip
3 * I2C address is allways 0x20 (0x10 at 7-bit mode).
5 * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
6 * This code is placed under the terms of the GNUv2 General Public License
10 #include <linux/i2c.h>
11 #include <linux/videodev.h>
12 #include <linux/delay.h>
13 #include <media/tuner.h>
15 #define PREFIX "TEA5761 "
17 /* from tuner-core.c */
18 extern int tuner_debug;
20 /*****************************************************************************/
22 /***************************
23 * TEA5761HN I2C registers *
24 ***************************/
26 /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
28 /* first byte for reading */
29 #define TEA5761_INTREG_IFFLAG 0x10
30 #define TEA5761_INTREG_LEVFLAG 0x8
31 #define TEA5761_INTREG_FRRFLAG 0x2
32 #define TEA5761_INTREG_BLFLAG 0x1
34 /* second byte for reading / byte for writing */
35 #define TEA5761_INTREG_IFMSK 0x10
36 #define TEA5761_INTREG_LEVMSK 0x8
37 #define TEA5761_INTREG_FRMSK 0x2
38 #define TEA5761_INTREG_BLMSK 0x1
40 /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
43 #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
44 #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */
46 /* Bits 0-5 for divider MSB */
49 /* Bits 0-7 for divider LSB */
51 /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
55 #define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */
56 #define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */
57 #define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */
58 #define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
59 #define TEA5761_TNCTRL_AFM 0x04
60 #define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */
61 #define TEA5761_TNCTRL_SNC 0x01
65 #define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */
66 #define TEA5761_TNCTRL_SSL_1 0x40
67 #define TEA5761_TNCTRL_SSL_0 0x20
68 #define TEA5761_TNCTRL_HLSI 0x10
69 #define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */
70 #define TEA5761_TNCTRL_SWP 0x04
71 #define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
72 #define TEA5761_TNCTRL_AHLSI 0x01
74 /* FRQCHECK - Read: bytes 6 and 7 */
77 /* Bits 0-5 for divider MSB */
80 /* Bits 0-7 for divider LSB */
82 /* TUNCHECK - Read: bytes 8 and 9 */
85 #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
86 #define TEA5761_TUNCHECK_TUNTO 0x01
89 #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
90 #define TEA5761_TUNCHECK_LD 0x08
91 #define TEA5761_TUNCHECK_STEREO 0x04
93 /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
95 /* All zero = no test mode */
97 /* MANID - Read: bytes 12 and 13 */
99 /* First byte - should be 0x10 */
100 #define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */
101 #define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */
103 /* Second byte - Should be 0x2b */
105 #define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */
106 #define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */
108 /* Chip ID - Read: bytes 14 and 15 */
110 /* First byte - should be 0x57 */
112 /* Second byte - should be 0x61 */
114 /*****************************************************************************/
116 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
118 struct tuner *t = i2c_get_clientdata(c);
120 tuner_warn("This tuner doesn't support TV freq.\n");
123 #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
124 static void tea5761_status_dump(unsigned char *buffer)
126 unsigned int div, frq;
128 div = ((buffer[2] & 0x3f) << 8) | buffer[3];
130 frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */
132 printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
133 frq / 1000, frq % 1000, div);
136 /* Freq should be specifyed at 62.5 Hz */
137 static void set_radio_freq(struct i2c_client *c, unsigned int frq)
139 struct tuner *t = i2c_get_clientdata(c);
140 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
144 tuner_dbg (PREFIX "radio freq counter %d\n", frq);
146 if (t->mode == T_STANDBY) {
147 tuner_dbg("TEA5761 set to standby mode\n");
148 buffer[5] |= TEA5761_TNCTRL_MU;
150 buffer[4] |= TEA5761_TNCTRL_PUPD_0;
154 if (t->audmode == V4L2_TUNER_MODE_MONO) {
155 tuner_dbg("TEA5761 set to mono\n");
156 buffer[5] |= TEA5761_TNCTRL_MST;
159 tuner_dbg("TEA5761 set to stereo\n");
162 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
163 buffer[1] = (div >> 8) & 0x3f;
164 buffer[2] = div & 0xff;
167 tea5761_status_dump(buffer);
169 if (7 != (rc = i2c_master_send(c, buffer, 7)))
170 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
173 static int tea5761_signal(struct i2c_client *c)
175 unsigned char buffer[16];
177 struct tuner *t = i2c_get_clientdata(c);
179 memset(buffer, 0, sizeof(buffer));
180 if (16 != (rc = i2c_master_recv(c, buffer, 16)))
181 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
183 return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
186 static int tea5761_stereo(struct i2c_client *c)
188 unsigned char buffer[16];
190 struct tuner *t = i2c_get_clientdata(c);
192 memset(buffer, 0, sizeof(buffer));
193 if (16 != (rc = i2c_master_recv(c, buffer, 16)))
194 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
196 rc = buffer[9] & TEA5761_TUNCHECK_STEREO;
198 tuner_dbg("TEA5761 radio ST GET = %02x\n", rc);
200 return (rc ? V4L2_TUNER_SUB_STEREO : 0);
203 int tea5761_autodetection(struct i2c_client *c)
205 unsigned char buffer[16];
207 struct tuner *t = i2c_get_clientdata(c);
209 if (16 != (rc = i2c_master_recv(c, buffer, 16))) {
210 tuner_warn("it is not a TEA5761. Received %i chars.\n", rc);
214 if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) {
215 tuner_warn("Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]);
218 tuner_warn("TEA5761 detected.\n");
222 static struct tuner_operations tea5761_tuner_ops = {
223 .set_tv_freq = set_tv_freq,
224 .set_radio_freq = set_radio_freq,
225 .has_signal = tea5761_signal,
226 .is_stereo = tea5761_stereo,
229 int tea5761_tuner_init(struct i2c_client *c)
231 struct tuner *t = i2c_get_clientdata(c);
233 if (tea5761_autodetection(c) == EINVAL)
236 tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio");
237 strlcpy(c->name, "tea5761", sizeof(c->name));
239 memcpy(&t->ops, &tea5761_tuner_ops, sizeof(struct tuner_operations));