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8573a9e6 MCC |
1 | /* |
2 | * For Philips TEA5761 FM Chip | |
3 | * I2C address is allways 0x20 (0x10 at 7-bit mode). | |
4 | * | |
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 | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/i2c.h> | |
11 | #include <linux/videodev.h> | |
12 | #include <linux/delay.h> | |
13 | #include <media/tuner.h> | |
8573a9e6 MCC |
14 | |
15 | #define PREFIX "TEA5761 " | |
16 | ||
17 | /* from tuner-core.c */ | |
18 | extern int tuner_debug; | |
19 | ||
20 | /*****************************************************************************/ | |
21 | ||
22 | /*************************** | |
23 | * TEA5761HN I2C registers * | |
24 | ***************************/ | |
25 | ||
26 | /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */ | |
27 | ||
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 | |
33 | ||
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 | |
39 | ||
40 | /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */ | |
41 | ||
42 | /* First byte */ | |
43 | #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */ | |
44 | #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */ | |
45 | ||
46 | /* Bits 0-5 for divider MSB */ | |
47 | ||
48 | /* Second byte */ | |
49 | /* Bits 0-7 for divider LSB */ | |
50 | ||
51 | /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */ | |
52 | ||
53 | /* first byte */ | |
54 | ||
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 | |
62 | ||
63 | /* second byte */ | |
64 | ||
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 | |
73 | ||
74 | /* FRQCHECK - Read: bytes 6 and 7 */ | |
75 | /* First byte */ | |
76 | ||
77 | /* Bits 0-5 for divider MSB */ | |
78 | ||
79 | /* Second byte */ | |
80 | /* Bits 0-7 for divider LSB */ | |
81 | ||
82 | /* TUNCHECK - Read: bytes 8 and 9 */ | |
83 | ||
84 | /* First byte */ | |
85 | #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */ | |
86 | #define TEA5761_TUNCHECK_TUNTO 0x01 | |
87 | ||
88 | /* Second byte */ | |
89 | #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */ | |
90 | #define TEA5761_TUNCHECK_LD 0x08 | |
91 | #define TEA5761_TUNCHECK_STEREO 0x04 | |
92 | ||
93 | /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */ | |
94 | ||
95 | /* All zero = no test mode */ | |
96 | ||
97 | /* MANID - Read: bytes 12 and 13 */ | |
98 | ||
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 */ | |
102 | ||
103 | /* Second byte - Should be 0x2b */ | |
104 | ||
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 */ | |
107 | ||
108 | /* Chip ID - Read: bytes 14 and 15 */ | |
109 | ||
110 | /* First byte - should be 0x57 */ | |
111 | ||
112 | /* Second byte - should be 0x61 */ | |
113 | ||
114 | /*****************************************************************************/ | |
115 | ||
116 | static void set_tv_freq(struct i2c_client *c, unsigned int freq) | |
117 | { | |
118 | struct tuner *t = i2c_get_clientdata(c); | |
119 | ||
120 | tuner_warn("This tuner doesn't support TV freq.\n"); | |
121 | } | |
122 | ||
123 | #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */ | |
124 | static void tea5761_status_dump(unsigned char *buffer) | |
125 | { | |
126 | unsigned int div, frq; | |
127 | ||
128 | div = ((buffer[2] & 0x3f) << 8) | buffer[3]; | |
129 | ||
130 | frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */ | |
131 | ||
132 | printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n", | |
133 | frq / 1000, frq % 1000, div); | |
134 | } | |
135 | ||
136 | /* Freq should be specifyed at 62.5 Hz */ | |
137 | static void set_radio_freq(struct i2c_client *c, unsigned int frq) | |
138 | { | |
139 | struct tuner *t = i2c_get_clientdata(c); | |
140 | unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 }; | |
141 | unsigned div; | |
142 | int rc; | |
143 | ||
144 | tuner_dbg (PREFIX "radio freq counter %d\n", frq); | |
145 | ||
146 | if (t->mode == T_STANDBY) { | |
147 | tuner_dbg("TEA5761 set to standby mode\n"); | |
148 | buffer[5] |= TEA5761_TNCTRL_MU; | |
149 | } else { | |
150 | buffer[4] |= TEA5761_TNCTRL_PUPD_0; | |
151 | } | |
152 | ||
153 | ||
154 | if (t->audmode == V4L2_TUNER_MODE_MONO) { | |
155 | tuner_dbg("TEA5761 set to mono\n"); | |
156 | buffer[5] |= TEA5761_TNCTRL_MST; | |
157 | ; | |
158 | } else { | |
159 | tuner_dbg("TEA5761 set to stereo\n"); | |
160 | } | |
161 | ||
162 | div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15; | |
163 | buffer[1] = (div >> 8) & 0x3f; | |
164 | buffer[2] = div & 0xff; | |
165 | ||
166 | if (tuner_debug) | |
167 | tea5761_status_dump(buffer); | |
168 | ||
169 | if (7 != (rc = i2c_master_send(c, buffer, 7))) | |
170 | tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); | |
171 | } | |
172 | ||
173 | static int tea5761_signal(struct i2c_client *c) | |
174 | { | |
175 | unsigned char buffer[16]; | |
176 | int rc; | |
177 | struct tuner *t = i2c_get_clientdata(c); | |
178 | ||
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); | |
182 | ||
183 | return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); | |
184 | } | |
185 | ||
186 | static int tea5761_stereo(struct i2c_client *c) | |
187 | { | |
188 | unsigned char buffer[16]; | |
189 | int rc; | |
190 | struct tuner *t = i2c_get_clientdata(c); | |
191 | ||
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); | |
195 | ||
196 | rc = buffer[9] & TEA5761_TUNCHECK_STEREO; | |
197 | ||
198 | tuner_dbg("TEA5761 radio ST GET = %02x\n", rc); | |
199 | ||
200 | return (rc ? V4L2_TUNER_SUB_STEREO : 0); | |
201 | } | |
202 | ||
203 | int tea5761_autodetection(struct i2c_client *c) | |
204 | { | |
205 | unsigned char buffer[16]; | |
206 | int rc; | |
207 | struct tuner *t = i2c_get_clientdata(c); | |
208 | ||
209 | if (16 != (rc = i2c_master_recv(c, buffer, 16))) { | |
210 | tuner_warn("it is not a TEA5761. Received %i chars.\n", rc); | |
211 | return EINVAL; | |
212 | } | |
213 | ||
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]); | |
216 | return EINVAL; | |
217 | } | |
218 | tuner_warn("TEA5761 detected.\n"); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | int tea5761_tuner_init(struct i2c_client *c) | |
223 | { | |
224 | struct tuner *t = i2c_get_clientdata(c); | |
225 | ||
226 | if (tea5761_autodetection(c) == EINVAL) | |
227 | return EINVAL; | |
228 | ||
229 | tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio"); | |
230 | strlcpy(c->name, "tea5761", sizeof(c->name)); | |
231 | ||
7a91a80a MK |
232 | t->ops.set_tv_freq = set_tv_freq; |
233 | t->ops.set_radio_freq = set_radio_freq; | |
234 | t->ops.has_signal = tea5761_signal; | |
235 | t->ops.is_stereo = tea5761_stereo; | |
8573a9e6 MCC |
236 | |
237 | return (0); | |
238 | } |