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Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -03001/*
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>
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -030011#include <linux/delay.h>
Michael Krufkyffbb8072007-08-21 01:14:12 -030012#include <linux/videodev.h>
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -030013#include <media/tuner.h>
Michael Krufky7ab10bf2007-08-27 21:23:40 -030014#include "tuner-i2c.h"
15#include "tea5761.h"
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -030016
Douglas Schilling Landgrafff699e62008-04-22 14:41:48 -030017static int debug;
Michael Krufky7ab10bf2007-08-27 21:23:40 -030018module_param(debug, int, 0644);
19MODULE_PARM_DESC(debug, "enable verbose debug messages");
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -030020
Michael Krufkydb8a6952007-08-21 01:24:42 -030021struct tea5761_priv {
22 struct tuner_i2c_props i2c_props;
Michael Krufky7ab10bf2007-08-27 21:23:40 -030023
24 u32 frequency;
Michael Krufkydb8a6952007-08-21 01:24:42 -030025};
26
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -030027/*****************************************************************************/
28
29/***************************
30 * TEA5761HN I2C registers *
31 ***************************/
32
33/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
34
35 /* first byte for reading */
36#define TEA5761_INTREG_IFFLAG 0x10
37#define TEA5761_INTREG_LEVFLAG 0x8
38#define TEA5761_INTREG_FRRFLAG 0x2
39#define TEA5761_INTREG_BLFLAG 0x1
40
41 /* second byte for reading / byte for writing */
42#define TEA5761_INTREG_IFMSK 0x10
43#define TEA5761_INTREG_LEVMSK 0x8
44#define TEA5761_INTREG_FRMSK 0x2
45#define TEA5761_INTREG_BLMSK 0x1
46
47/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
48
49 /* First byte */
50#define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
51#define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */
52
53 /* Bits 0-5 for divider MSB */
54
55 /* Second byte */
56 /* Bits 0-7 for divider LSB */
57
58/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
59
60 /* first byte */
61
62#define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */
63#define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */
64#define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */
65#define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
66#define TEA5761_TNCTRL_AFM 0x04
67#define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */
68#define TEA5761_TNCTRL_SNC 0x01
69
70 /* second byte */
71
72#define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */
73#define TEA5761_TNCTRL_SSL_1 0x40
74#define TEA5761_TNCTRL_SSL_0 0x20
75#define TEA5761_TNCTRL_HLSI 0x10
76#define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */
77#define TEA5761_TNCTRL_SWP 0x04
78#define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
79#define TEA5761_TNCTRL_AHLSI 0x01
80
81/* FRQCHECK - Read: bytes 6 and 7 */
82 /* First byte */
83
84 /* Bits 0-5 for divider MSB */
85
86 /* Second byte */
87 /* Bits 0-7 for divider LSB */
88
89/* TUNCHECK - Read: bytes 8 and 9 */
90
91 /* First byte */
92#define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
93#define TEA5761_TUNCHECK_TUNTO 0x01
94
95 /* Second byte */
96#define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
97#define TEA5761_TUNCHECK_LD 0x08
98#define TEA5761_TUNCHECK_STEREO 0x04
99
100/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
101
102 /* All zero = no test mode */
103
104/* MANID - Read: bytes 12 and 13 */
105
106 /* First byte - should be 0x10 */
107#define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */
108#define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */
109
110 /* Second byte - Should be 0x2b */
111
112#define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */
113#define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */
114
115/* Chip ID - Read: bytes 14 and 15 */
116
117 /* First byte - should be 0x57 */
118
119 /* Second byte - should be 0x61 */
120
121/*****************************************************************************/
122
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300123#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
124static 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
Michael Krufky27566652008-04-22 14:41:53 -0300132 printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300133 frq / 1000, frq % 1000, div);
134}
135
136/* Freq should be specifyed at 62.5 Hz */
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300137static int set_radio_freq(struct dvb_frontend *fe,
138 struct analog_parameters *params)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300139{
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300140 struct tea5761_priv *priv = fe->tuner_priv;
141 unsigned int frq = params->frequency;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300142 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
143 unsigned div;
144 int rc;
145
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300146 tuner_dbg("radio freq counter %d\n", frq);
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300147
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300148 if (params->mode == T_STANDBY) {
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300149 tuner_dbg("TEA5761 set to standby mode\n");
150 buffer[5] |= TEA5761_TNCTRL_MU;
151 } else {
152 buffer[4] |= TEA5761_TNCTRL_PUPD_0;
153 }
154
155
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300156 if (params->audmode == V4L2_TUNER_MODE_MONO) {
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300157 tuner_dbg("TEA5761 set to mono\n");
158 buffer[5] |= TEA5761_TNCTRL_MST;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300159 } else {
160 tuner_dbg("TEA5761 set to stereo\n");
161 }
162
163 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
164 buffer[1] = (div >> 8) & 0x3f;
165 buffer[2] = div & 0xff;
166
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300167 if (debug)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300168 tea5761_status_dump(buffer);
169
Michael Krufkydb8a6952007-08-21 01:24:42 -0300170 if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300171 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300172
173 priv->frequency = frq * 125 / 2;
174
175 return 0;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300176}
177
Michael Krufkyfd443f72007-08-31 16:39:57 -0300178static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300179{
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300180 struct tea5761_priv *priv = fe->tuner_priv;
Michael Krufkyfd443f72007-08-31 16:39:57 -0300181 int rc;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300182
Michael Krufkyfd443f72007-08-31 16:39:57 -0300183 memset(buffer, 0, 16);
184 if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
185 tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
186 return -EREMOTEIO;
187 }
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300188
Michael Krufkyfd443f72007-08-31 16:39:57 -0300189 return 0;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300190}
191
Michael Krufkyfd443f72007-08-31 16:39:57 -0300192static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300193{
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300194 struct tea5761_priv *priv = fe->tuner_priv;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300195
Michael Krufkyfd443f72007-08-31 16:39:57 -0300196 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300197
Michael Krufkyfd443f72007-08-31 16:39:57 -0300198 tuner_dbg("Signal strength: %d\n", signal);
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300199
Michael Krufkyfd443f72007-08-31 16:39:57 -0300200 return signal;
201}
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300202
Michael Krufkyfd443f72007-08-31 16:39:57 -0300203static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
204{
205 struct tea5761_priv *priv = fe->tuner_priv;
206
207 int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
208
209 tuner_dbg("Radio ST GET = %02x\n", stereo);
210
211 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300212}
213
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300214static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
215{
Michael Krufkyfd443f72007-08-31 16:39:57 -0300216 unsigned char buffer[16];
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300217
218 *status = 0;
219
Michael Krufkyfd443f72007-08-31 16:39:57 -0300220 if (0 == tea5761_read_status(fe, buffer)) {
221 if (tea5761_signal(fe, buffer))
222 *status = TUNER_STATUS_LOCKED;
223 if (tea5761_stereo(fe, buffer))
224 *status |= TUNER_STATUS_STEREO;
225 }
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300226
Michael Krufkyfd443f72007-08-31 16:39:57 -0300227 return 0;
228}
229
230static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
231{
232 unsigned char buffer[16];
233
234 *strength = 0;
235
236 if (0 == tea5761_read_status(fe, buffer))
237 *strength = tea5761_signal(fe, buffer);
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300238
239 return 0;
240}
241
242int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300243{
244 unsigned char buffer[16];
245 int rc;
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300246 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300247
Michael Krufkydb8a6952007-08-21 01:24:42 -0300248 if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300249 printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300250 return EINVAL;
251 }
252
253 if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) {
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300254 printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]);
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300255 return EINVAL;
256 }
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300257 printk(KERN_WARNING "TEA5761 detected.\n");
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300258 return 0;
259}
260
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300261static int tea5761_release(struct dvb_frontend *fe)
Michael Krufkydb8a6952007-08-21 01:24:42 -0300262{
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300263 kfree(fe->tuner_priv);
264 fe->tuner_priv = NULL;
265
266 return 0;
Michael Krufkydb8a6952007-08-21 01:24:42 -0300267}
268
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300269static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
270{
271 struct tea5761_priv *priv = fe->tuner_priv;
272 *frequency = priv->frequency;
273 return 0;
274}
275
276static struct dvb_tuner_ops tea5761_tuner_ops = {
277 .info = {
278 .name = "tea5761", // Philips TEA5761HN FM Radio
279 },
280 .set_analog_params = set_radio_freq,
281 .release = tea5761_release,
282 .get_frequency = tea5761_get_frequency,
283 .get_status = tea5761_get_status,
Michael Krufkyfd443f72007-08-31 16:39:57 -0300284 .get_rf_strength = tea5761_get_rf_strength,
Michael Krufkye407cd52007-06-06 16:16:29 -0300285};
286
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300287struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
288 struct i2c_adapter* i2c_adap,
289 u8 i2c_addr)
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300290{
Michael Krufkydb8a6952007-08-21 01:24:42 -0300291 struct tea5761_priv *priv = NULL;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300292
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300293 if (tea5761_autodetection(i2c_adap, i2c_addr) == EINVAL)
294 return NULL;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300295
Michael Krufkydb8a6952007-08-21 01:24:42 -0300296 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
297 if (priv == NULL)
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300298 return NULL;
299 fe->tuner_priv = priv;
Michael Krufkydb8a6952007-08-21 01:24:42 -0300300
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300301 priv->i2c_props.addr = i2c_addr;
302 priv->i2c_props.adap = i2c_adap;
Michael Krufky27566652008-04-22 14:41:53 -0300303 priv->i2c_props.name = "tea5761";
Michael Krufkydb8a6952007-08-21 01:24:42 -0300304
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300305 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
306 sizeof(struct dvb_tuner_ops));
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300307
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300308 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300309
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300310 return fe;
Mauro Carvalho Chehab8573a9e2007-04-08 01:09:11 -0300311}
Michael Krufky7ab10bf2007-08-27 21:23:40 -0300312
313
314EXPORT_SYMBOL_GPL(tea5761_attach);
315EXPORT_SYMBOL_GPL(tea5761_autodetection);
316
317MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
318MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
319MODULE_LICENSE("GPL");