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Diffstat (limited to 'drivers/media/common/tuners/tea5761.c')
-rw-r--r--drivers/media/common/tuners/tea5761.c324
1 files changed, 324 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/tea5761.c b/drivers/media/common/tuners/tea5761.c
new file mode 100644
index 000000000000..b93cdef9ac73
--- /dev/null
+++ b/drivers/media/common/tuners/tea5761.c
@@ -0,0 +1,324 @@
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/delay.h>
12#include <linux/videodev.h>
13#include <media/tuner.h>
14#include "tuner-i2c.h"
15#include "tea5761.h"
16
17static int debug;
18module_param(debug, int, 0644);
19MODULE_PARM_DESC(debug, "enable verbose debug messages");
20
21struct tea5761_priv {
22 struct tuner_i2c_props i2c_props;
23
24 u32 frequency;
25};
26
27/*****************************************************************************/
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
123#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
132 printk(KERN_INFO "tea5761: 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 */
137static int set_radio_freq(struct dvb_frontend *fe,
138 struct analog_parameters *params)
139{
140 struct tea5761_priv *priv = fe->tuner_priv;
141 unsigned int frq = params->frequency;
142 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
143 unsigned div;
144 int rc;
145
146 tuner_dbg("radio freq counter %d\n", frq);
147
148 if (params->mode == T_STANDBY) {
149 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
156 if (params->audmode == V4L2_TUNER_MODE_MONO) {
157 tuner_dbg("TEA5761 set to mono\n");
158 buffer[5] |= TEA5761_TNCTRL_MST;
159 } 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
167 if (debug)
168 tea5761_status_dump(buffer);
169
170 if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
171 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
172
173 priv->frequency = frq * 125 / 2;
174
175 return 0;
176}
177
178static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
179{
180 struct tea5761_priv *priv = fe->tuner_priv;
181 int rc;
182
183 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 }
188
189 return 0;
190}
191
192static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
193{
194 struct tea5761_priv *priv = fe->tuner_priv;
195
196 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
197
198 tuner_dbg("Signal strength: %d\n", signal);
199
200 return signal;
201}
202
203static 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);
212}
213
214static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
215{
216 unsigned char buffer[16];
217
218 *status = 0;
219
220 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 }
226
227 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);
238
239 return 0;
240}
241
242int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
243{
244 unsigned char buffer[16];
245 int rc;
246 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
247
248 if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
249 printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
250 return -EINVAL;
251 }
252
253 if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) {
254 printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
255 " It is not a TEA5761\n",
256 buffer[13], buffer[14], buffer[15]);
257 return -EINVAL;
258 }
259 printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
260 "Manufacturer ID= 0x%02x\n",
261 buffer[14], buffer[15], buffer[13]);
262
263 return 0;
264}
265
266static int tea5761_release(struct dvb_frontend *fe)
267{
268 kfree(fe->tuner_priv);
269 fe->tuner_priv = NULL;
270
271 return 0;
272}
273
274static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
275{
276 struct tea5761_priv *priv = fe->tuner_priv;
277 *frequency = priv->frequency;
278 return 0;
279}
280
281static struct dvb_tuner_ops tea5761_tuner_ops = {
282 .info = {
283 .name = "tea5761", // Philips TEA5761HN FM Radio
284 },
285 .set_analog_params = set_radio_freq,
286 .release = tea5761_release,
287 .get_frequency = tea5761_get_frequency,
288 .get_status = tea5761_get_status,
289 .get_rf_strength = tea5761_get_rf_strength,
290};
291
292struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
293 struct i2c_adapter* i2c_adap,
294 u8 i2c_addr)
295{
296 struct tea5761_priv *priv = NULL;
297
298 if (tea5761_autodetection(i2c_adap, i2c_addr) == EINVAL)
299 return NULL;
300
301 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
302 if (priv == NULL)
303 return NULL;
304 fe->tuner_priv = priv;
305
306 priv->i2c_props.addr = i2c_addr;
307 priv->i2c_props.adap = i2c_adap;
308 priv->i2c_props.name = "tea5761";
309
310 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
311 sizeof(struct dvb_tuner_ops));
312
313 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
314
315 return fe;
316}
317
318
319EXPORT_SYMBOL_GPL(tea5761_attach);
320EXPORT_SYMBOL_GPL(tea5761_autodetection);
321
322MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
323MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
324MODULE_LICENSE("GPL");