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/delay.h>
12 #include <linux/videodev2.h>
13 #include <media/tuner.h>
14 #include "tuner-i2c.h"
18 module_param(debug, int, 0644);
19 MODULE_PARM_DESC(debug, "enable verbose debug messages");
22 struct tuner_i2c_props i2c_props;
27 /*****************************************************************************/
29 /***************************
30 * TEA5761HN I2C registers *
31 ***************************/
33 /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
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
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
47 /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
50 #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
51 #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */
53 /* Bits 0-5 for divider MSB */
56 /* Bits 0-7 for divider LSB */
58 /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
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
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
81 /* FRQCHECK - Read: bytes 6 and 7 */
84 /* Bits 0-5 for divider MSB */
87 /* Bits 0-7 for divider LSB */
89 /* TUNCHECK - Read: bytes 8 and 9 */
92 #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
93 #define TEA5761_TUNCHECK_TUNTO 0x01
96 #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
97 #define TEA5761_TUNCHECK_LD 0x08
98 #define TEA5761_TUNCHECK_STEREO 0x04
100 /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
102 /* All zero = no test mode */
104 /* MANID - Read: bytes 12 and 13 */
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 */
110 /* Second byte - Should be 0x2b */
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 */
115 /* Chip ID - Read: bytes 14 and 15 */
117 /* First byte - should be 0x57 */
119 /* Second byte - should be 0x61 */
121 /*****************************************************************************/
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(KERN_INFO "tea5761: 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 int set_radio_freq(struct dvb_frontend *fe,
138 struct analog_parameters *params)
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 };
146 tuner_dbg("radio freq counter %d\n", frq);
148 if (params->mode == T_STANDBY) {
149 tuner_dbg("TEA5761 set to standby mode\n");
150 buffer[5] |= TEA5761_TNCTRL_MU;
152 buffer[4] |= TEA5761_TNCTRL_PUPD_0;
156 if (params->audmode == V4L2_TUNER_MODE_MONO) {
157 tuner_dbg("TEA5761 set to mono\n");
158 buffer[5] |= TEA5761_TNCTRL_MST;
160 tuner_dbg("TEA5761 set to stereo\n");
163 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
164 buffer[1] = (div >> 8) & 0x3f;
165 buffer[2] = div & 0xff;
168 tea5761_status_dump(buffer);
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);
173 priv->frequency = frq * 125 / 2;
178 static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
180 struct tea5761_priv *priv = fe->tuner_priv;
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);
192 static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
194 struct tea5761_priv *priv = fe->tuner_priv;
196 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
198 tuner_dbg("Signal strength: %d\n", signal);
203 static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
205 struct tea5761_priv *priv = fe->tuner_priv;
207 int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
209 tuner_dbg("Radio ST GET = %02x\n", stereo);
211 return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
214 static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
216 unsigned char buffer[16];
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;
230 static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
232 unsigned char buffer[16];
236 if (0 == tea5761_read_status(fe, buffer))
237 *strength = tea5761_signal(fe, buffer);
242 int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
244 unsigned char buffer[16];
246 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
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);
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]);
259 printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
260 "Manufacturer ID= 0x%02x\n",
261 buffer[14], buffer[15], buffer[13]);
266 static int tea5761_release(struct dvb_frontend *fe)
268 kfree(fe->tuner_priv);
269 fe->tuner_priv = NULL;
274 static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
276 struct tea5761_priv *priv = fe->tuner_priv;
277 *frequency = priv->frequency;
281 static struct dvb_tuner_ops tea5761_tuner_ops = {
283 .name = "tea5761", // Philips TEA5761HN FM Radio
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,
292 struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
293 struct i2c_adapter* i2c_adap,
296 struct tea5761_priv *priv = NULL;
298 if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
301 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
304 fe->tuner_priv = priv;
306 priv->i2c_props.addr = i2c_addr;
307 priv->i2c_props.adap = i2c_adap;
308 priv->i2c_props.name = "tea5761";
310 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
311 sizeof(struct dvb_tuner_ops));
313 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
319 EXPORT_SYMBOL_GPL(tea5761_attach);
320 EXPORT_SYMBOL_GPL(tea5761_autodetection);
322 MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
323 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
324 MODULE_LICENSE("GPL");