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/slab.h> 12#include <linux/delay.h> 13#include <linux/videodev2.h> 14#include <media/tuner.h> 15#include "tuner-i2c.h" 16#include "tea5761.h" 17 18static int debug; 19module_param(debug, int, 0644); 20MODULE_PARM_DESC(debug, "enable verbose debug messages"); 21 22struct tea5761_priv { 23 struct tuner_i2c_props i2c_props; 24 25 u32 frequency; 26}; 27 28/*****************************************************************************/ 29 30/*************************** 31 * TEA5761HN I2C registers * 32 ***************************/ 33 34/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */ 35 36 /* first byte for reading */ 37#define TEA5761_INTREG_IFFLAG 0x10 38#define TEA5761_INTREG_LEVFLAG 0x8 39#define TEA5761_INTREG_FRRFLAG 0x2 40#define TEA5761_INTREG_BLFLAG 0x1 41 42 /* second byte for reading / byte for writing */ 43#define TEA5761_INTREG_IFMSK 0x10 44#define TEA5761_INTREG_LEVMSK 0x8 45#define TEA5761_INTREG_FRMSK 0x2 46#define TEA5761_INTREG_BLMSK 0x1 47 48/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */ 49 50 /* First byte */ 51#define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */ 52#define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */ 53 54 /* Bits 0-5 for divider MSB */ 55 56 /* Second byte */ 57 /* Bits 0-7 for divider LSB */ 58 59/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */ 60 61 /* first byte */ 62 63#define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */ 64#define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */ 65#define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */ 66#define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */ 67#define TEA5761_TNCTRL_AFM 0x04 68#define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */ 69#define TEA5761_TNCTRL_SNC 0x01 70 71 /* second byte */ 72 73#define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */ 74#define TEA5761_TNCTRL_SSL_1 0x40 75#define TEA5761_TNCTRL_SSL_0 0x20 76#define TEA5761_TNCTRL_HLSI 0x10 77#define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */ 78#define TEA5761_TNCTRL_SWP 0x04 79#define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */ 80#define TEA5761_TNCTRL_AHLSI 0x01 81 82/* FRQCHECK - Read: bytes 6 and 7 */ 83 /* First byte */ 84 85 /* Bits 0-5 for divider MSB */ 86 87 /* Second byte */ 88 /* Bits 0-7 for divider LSB */ 89 90/* TUNCHECK - Read: bytes 8 and 9 */ 91 92 /* First byte */ 93#define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */ 94#define TEA5761_TUNCHECK_TUNTO 0x01 95 96 /* Second byte */ 97#define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */ 98#define TEA5761_TUNCHECK_LD 0x08 99#define TEA5761_TUNCHECK_STEREO 0x04 100 101/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */ 102 103 /* All zero = no test mode */ 104 105/* MANID - Read: bytes 12 and 13 */ 106 107 /* First byte - should be 0x10 */ 108#define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */ 109#define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */ 110 111 /* Second byte - Should be 0x2b */ 112 113#define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */ 114#define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */ 115 116/* Chip ID - Read: bytes 14 and 15 */ 117 118 /* First byte - should be 0x57 */ 119 120 /* Second byte - should be 0x61 */ 121 122/*****************************************************************************/ 123 124#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */ 125static void tea5761_status_dump(unsigned char *buffer) 126{ 127 unsigned int div, frq; 128 129 div = ((buffer[2] & 0x3f) << 8) | buffer[3]; 130 131 frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */ 132 133 printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n", 134 frq / 1000, frq % 1000, div); 135} 136 137/* Freq should be specifyed at 62.5 Hz */ 138static int set_radio_freq(struct dvb_frontend *fe, 139 struct analog_parameters *params) 140{ 141 struct tea5761_priv *priv = fe->tuner_priv; 142 unsigned int frq = params->frequency; 143 unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 }; 144 unsigned div; 145 int rc; 146 147 tuner_dbg("radio freq counter %d\n", frq); 148 149 if (params->mode == T_STANDBY) { 150 tuner_dbg("TEA5761 set to standby mode\n"); 151 buffer[5] |= TEA5761_TNCTRL_MU; 152 } else { 153 buffer[4] |= TEA5761_TNCTRL_PUPD_0; 154 } 155 156 157 if (params->audmode == V4L2_TUNER_MODE_MONO) { 158 tuner_dbg("TEA5761 set to mono\n"); 159 buffer[5] |= TEA5761_TNCTRL_MST; 160 } else { 161 tuner_dbg("TEA5761 set to stereo\n"); 162 } 163 164 div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15; 165 buffer[1] = (div >> 8) & 0x3f; 166 buffer[2] = div & 0xff; 167 168 if (debug) 169 tea5761_status_dump(buffer); 170 171 if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7))) 172 tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); 173 174 priv->frequency = frq * 125 / 2; 175 176 return 0; 177} 178 179static int tea5761_read_status(struct dvb_frontend *fe, char *buffer) 180{ 181 struct tea5761_priv *priv = fe->tuner_priv; 182 int rc; 183 184 memset(buffer, 0, 16); 185 if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) { 186 tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc); 187 return -EREMOTEIO; 188 } 189 190 return 0; 191} 192 193static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer) 194{ 195 struct tea5761_priv *priv = fe->tuner_priv; 196 197 int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); 198 199 tuner_dbg("Signal strength: %d\n", signal); 200 201 return signal; 202} 203 204static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer) 205{ 206 struct tea5761_priv *priv = fe->tuner_priv; 207 208 int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO; 209 210 tuner_dbg("Radio ST GET = %02x\n", stereo); 211 212 return (stereo ? V4L2_TUNER_SUB_STEREO : 0); 213} 214 215static int tea5761_get_status(struct dvb_frontend *fe, u32 *status) 216{ 217 unsigned char buffer[16]; 218 219 *status = 0; 220 221 if (0 == tea5761_read_status(fe, buffer)) { 222 if (tea5761_signal(fe, buffer)) 223 *status = TUNER_STATUS_LOCKED; 224 if (tea5761_stereo(fe, buffer)) 225 *status |= TUNER_STATUS_STEREO; 226 } 227 228 return 0; 229} 230 231static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength) 232{ 233 unsigned char buffer[16]; 234 235 *strength = 0; 236 237 if (0 == tea5761_read_status(fe, buffer)) 238 *strength = tea5761_signal(fe, buffer); 239 240 return 0; 241} 242 243int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) 244{ 245 unsigned char buffer[16]; 246 int rc; 247 struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; 248 249 if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) { 250 printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc); 251 return -EINVAL; 252 } 253 254 if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) { 255 printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x." 256 " It is not a TEA5761\n", 257 buffer[13], buffer[14], buffer[15]); 258 return -EINVAL; 259 } 260 printk(KERN_WARNING "tea5761: TEA%02x%02x detected. " 261 "Manufacturer ID= 0x%02x\n", 262 buffer[14], buffer[15], buffer[13]); 263 264 return 0; 265} 266 267static int tea5761_release(struct dvb_frontend *fe) 268{ 269 kfree(fe->tuner_priv); 270 fe->tuner_priv = NULL; 271 272 return 0; 273} 274 275static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency) 276{ 277 struct tea5761_priv *priv = fe->tuner_priv; 278 *frequency = priv->frequency; 279 return 0; 280} 281 282static struct dvb_tuner_ops tea5761_tuner_ops = { 283 .info = { 284 .name = "tea5761", // Philips TEA5761HN FM Radio 285 }, 286 .set_analog_params = set_radio_freq, 287 .release = tea5761_release, 288 .get_frequency = tea5761_get_frequency, 289 .get_status = tea5761_get_status, 290 .get_rf_strength = tea5761_get_rf_strength, 291}; 292 293struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe, 294 struct i2c_adapter* i2c_adap, 295 u8 i2c_addr) 296{ 297 struct tea5761_priv *priv = NULL; 298 299 if (tea5761_autodetection(i2c_adap, i2c_addr) != 0) 300 return NULL; 301 302 priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL); 303 if (priv == NULL) 304 return NULL; 305 fe->tuner_priv = priv; 306 307 priv->i2c_props.addr = i2c_addr; 308 priv->i2c_props.adap = i2c_adap; 309 priv->i2c_props.name = "tea5761"; 310 311 memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops, 312 sizeof(struct dvb_tuner_ops)); 313 314 tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio"); 315 316 return fe; 317} 318 319 320EXPORT_SYMBOL_GPL(tea5761_attach); 321EXPORT_SYMBOL_GPL(tea5761_autodetection); 322 323MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver"); 324MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>"); 325MODULE_LICENSE("GPL"); 326