--- /dev/null
+/*
+ * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
+ * I2C address is allways 0xC0.
+ *
+ *
+ * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@infradead.org)
+ * This code is placed under the terms of the GNU General Public License
+ *
+ * tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
+ * from their contributions on DScaler.
+ */
+
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/videodev.h>
+#include "tuner-i2c.h"
+#include "tea5767.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+/*****************************************************************************/
+
+struct tea5767_priv {
+ struct tuner_i2c_props i2c_props;
+ u32 frequency;
+ struct tea5767_ctrl ctrl;
+};
+
+/*****************************************************************************/
+
+/******************************
+ * Write mode register values *
+ ******************************/
+
+/* First register */
+#define TEA5767_MUTE 0x80 /* Mutes output */
+#define TEA5767_SEARCH 0x40 /* Activates station search */
+/* Bits 0-5 for divider MSB */
+
+/* Second register */
+/* Bits 0-7 for divider LSB */
+
+/* Third register */
+
+/* Station search from botton to up */
+#define TEA5767_SEARCH_UP 0x80
+
+/* Searches with ADC output = 10 */
+#define TEA5767_SRCH_HIGH_LVL 0x60
+
+/* Searches with ADC output = 10 */
+#define TEA5767_SRCH_MID_LVL 0x40
+
+/* Searches with ADC output = 5 */
+#define TEA5767_SRCH_LOW_LVL 0x20
+
+/* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */
+#define TEA5767_HIGH_LO_INJECT 0x10
+
+/* Disable stereo */
+#define TEA5767_MONO 0x08
+
+/* Disable right channel and turns to mono */
+#define TEA5767_MUTE_RIGHT 0x04
+
+/* Disable left channel and turns to mono */
+#define TEA5767_MUTE_LEFT 0x02
+
+#define TEA5767_PORT1_HIGH 0x01
+
+/* Fourth register */
+#define TEA5767_PORT2_HIGH 0x80
+/* Chips stops working. Only I2C bus remains on */
+#define TEA5767_STDBY 0x40
+
+/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
+#define TEA5767_JAPAN_BAND 0x20
+
+/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
+#define TEA5767_XTAL_32768 0x10
+
+/* Cuts weak signals */
+#define TEA5767_SOFT_MUTE 0x08
+
+/* Activates high cut control */
+#define TEA5767_HIGH_CUT_CTRL 0x04
+
+/* Activates stereo noise control */
+#define TEA5767_ST_NOISE_CTL 0x02
+
+/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
+#define TEA5767_SRCH_IND 0x01
+
+/* Fifth register */
+
+/* By activating, it will use Xtal at 13 MHz as reference for divider */
+#define TEA5767_PLLREF_ENABLE 0x80
+
+/* By activating, deemphasis=50, or else, deemphasis of 50us */
+#define TEA5767_DEEMPH_75 0X40
+
+/*****************************
+ * Read mode register values *
+ *****************************/
+
+/* First register */
+#define TEA5767_READY_FLAG_MASK 0x80
+#define TEA5767_BAND_LIMIT_MASK 0X40
+/* Bits 0-5 for divider MSB after search or preset */
+
+/* Second register */
+/* Bits 0-7 for divider LSB after search or preset */
+
+/* Third register */
+#define TEA5767_STEREO_MASK 0x80
+#define TEA5767_IF_CNTR_MASK 0x7f
+
+/* Fourth register */
+#define TEA5767_ADC_LEVEL_MASK 0xf0
+
+/* should be 0 */
+#define TEA5767_CHIP_ID_MASK 0x0f
+
+/* Fifth register */
+/* Reserved for future extensions */
+#define TEA5767_RESERVED_MASK 0xff
+
+/*****************************************************************************/
+
+static void tea5767_status_dump(struct tea5767_priv *priv,
+ unsigned char *buffer)
+{
+ unsigned int div, frq;
+
+ if (TEA5767_READY_FLAG_MASK & buffer[0])
+ tuner_info("Ready Flag ON\n");
+ else
+ tuner_info("Ready Flag OFF\n");
+
+ if (TEA5767_BAND_LIMIT_MASK & buffer[0])
+ tuner_info("Tuner at band limit\n");
+ else
+ tuner_info("Tuner not at band limit\n");
+
+ div = ((buffer[0] & 0x3f) << 8) | buffer[1];
+
+ switch (priv->ctrl.xtal_freq) {
+ case TEA5767_HIGH_LO_13MHz:
+ frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
+ break;
+ case TEA5767_LOW_LO_13MHz:
+ frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
+ break;
+ case TEA5767_LOW_LO_32768:
+ frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
+ break;
+ case TEA5767_HIGH_LO_32768:
+ default:
+ frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
+ break;
+ }
+ buffer[0] = (div >> 8) & 0x3f;
+ buffer[1] = div & 0xff;
+
+ tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
+ frq / 1000, frq % 1000, div);
+
+ if (TEA5767_STEREO_MASK & buffer[2])
+ tuner_info("Stereo\n");
+ else
+ tuner_info("Mono\n");
+
+ tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
+
+ tuner_info("ADC Level = %d\n",
+ (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
+
+ tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
+
+ tuner_info("Reserved = 0x%02x\n",
+ (buffer[4] & TEA5767_RESERVED_MASK));
+}
+
+/* Freq should be specifyed at 62.5 Hz */
+static int set_radio_freq(struct dvb_frontend *fe,
+ struct analog_parameters *params)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+ unsigned int frq = params->frequency;
+ unsigned char buffer[5];
+ unsigned div;
+ int rc;
+
+ tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
+
+ buffer[2] = 0;
+
+ if (priv->ctrl.port1)
+ buffer[2] |= TEA5767_PORT1_HIGH;
+
+ if (params->audmode == V4L2_TUNER_MODE_MONO) {
+ tuner_dbg("TEA5767 set to mono\n");
+ buffer[2] |= TEA5767_MONO;
+ } else {
+ tuner_dbg("TEA5767 set to stereo\n");
+ }
+
+
+ buffer[3] = 0;
+
+ if (priv->ctrl.port2)
+ buffer[3] |= TEA5767_PORT2_HIGH;
+
+ if (priv->ctrl.high_cut)
+ buffer[3] |= TEA5767_HIGH_CUT_CTRL;
+
+ if (priv->ctrl.st_noise)
+ buffer[3] |= TEA5767_ST_NOISE_CTL;
+
+ if (priv->ctrl.soft_mute)
+ buffer[3] |= TEA5767_SOFT_MUTE;
+
+ if (priv->ctrl.japan_band)
+ buffer[3] |= TEA5767_JAPAN_BAND;
+
+ buffer[4] = 0;
+
+ if (priv->ctrl.deemph_75)
+ buffer[4] |= TEA5767_DEEMPH_75;
+
+ if (priv->ctrl.pllref)
+ buffer[4] |= TEA5767_PLLREF_ENABLE;
+
+
+ /* Rounds freq to next decimal value - for 62.5 KHz step */
+ /* frq = 20*(frq/16)+radio_frq[frq%16]; */
+
+ switch (priv->ctrl.xtal_freq) {
+ case TEA5767_HIGH_LO_13MHz:
+ tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
+ buffer[2] |= TEA5767_HIGH_LO_INJECT;
+ div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
+ break;
+ case TEA5767_LOW_LO_13MHz:
+ tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
+
+ div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
+ break;
+ case TEA5767_LOW_LO_32768:
+ tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
+ buffer[3] |= TEA5767_XTAL_32768;
+ /* const 700=4000*175 Khz - to adjust freq to right value */
+ div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
+ break;
+ case TEA5767_HIGH_LO_32768:
+ default:
+ tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
+
+ buffer[2] |= TEA5767_HIGH_LO_INJECT;
+ buffer[3] |= TEA5767_XTAL_32768;
+ div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
+ break;
+ }
+ buffer[0] = (div >> 8) & 0x3f;
+ buffer[1] = div & 0xff;
+
+ if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
+ tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
+
+ if (debug) {
+ if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
+ tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
+ else
+ tea5767_status_dump(priv, buffer);
+ }
+
+ priv->frequency = frq * 125 / 2;
+
+ return 0;
+}
+
+static int tea5767_read_status(struct dvb_frontend *fe, char *buffer)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+ int rc;
+
+ memset(buffer, 0, 5);
+ if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
+ tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+
+ int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
+
+ tuner_dbg("Signal strength: %d\n", signal);
+
+ return signal;
+}
+
+static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+
+ int stereo = buffer[2] & TEA5767_STEREO_MASK;
+
+ tuner_dbg("Radio ST GET = %02x\n", stereo);
+
+ return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
+}
+
+static int tea5767_get_status(struct dvb_frontend *fe, u32 *status)
+{
+ unsigned char buffer[5];
+
+ *status = 0;
+
+ if (0 == tea5767_read_status(fe, buffer)) {
+ if (tea5767_signal(fe, buffer))
+ *status = TUNER_STATUS_LOCKED;
+ if (tea5767_stereo(fe, buffer))
+ *status |= TUNER_STATUS_STEREO;
+ }
+
+ return 0;
+}
+
+static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ unsigned char buffer[5];
+
+ *strength = 0;
+
+ if (0 == tea5767_read_status(fe, buffer))
+ *strength = tea5767_signal(fe, buffer);
+
+ return 0;
+}
+
+static int tea5767_standby(struct dvb_frontend *fe)
+{
+ unsigned char buffer[5];
+ struct tea5767_priv *priv = fe->tuner_priv;
+ unsigned div, rc;
+
+ div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
+ buffer[0] = (div >> 8) & 0x3f;
+ buffer[1] = div & 0xff;
+ buffer[2] = TEA5767_PORT1_HIGH;
+ buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
+ TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;
+ buffer[4] = 0;
+
+ if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
+ tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
+
+ return 0;
+}
+
+int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
+{
+ struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
+ unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ int rc;
+
+ if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
+ printk(KERN_WARNING "It is not a TEA5767. Received %i bytes.\n", rc);
+ return EINVAL;
+ }
+
+ /* If all bytes are the same then it's a TV tuner and not a tea5767 */
+ if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
+ buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
+ printk(KERN_WARNING "All bytes are equal. It is not a TEA5767\n");
+ return EINVAL;
+ }
+
+ /* Status bytes:
+ * Byte 4: bit 3:1 : CI (Chip Identification) == 0
+ * bit 0 : internally set to 0
+ * Byte 5: bit 7:0 : == 0
+ */
+ if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {
+ printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
+ return EINVAL;
+ }
+
+
+ return 0;
+}
+
+static int tea5767_release(struct dvb_frontend *fe)
+{
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+
+ return 0;
+}
+
+static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+ *frequency = priv->frequency;
+
+ return 0;
+}
+
+static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg)
+{
+ struct tea5767_priv *priv = fe->tuner_priv;
+
+ memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));
+
+ return 0;
+}
+
+static struct dvb_tuner_ops tea5767_tuner_ops = {
+ .info = {
+ .name = "tea5767", // Philips TEA5767HN FM Radio
+ },
+
+ .set_analog_params = set_radio_freq,
+ .set_config = tea5767_set_config,
+ .sleep = tea5767_standby,
+ .release = tea5767_release,
+ .get_frequency = tea5767_get_frequency,
+ .get_status = tea5767_get_status,
+ .get_rf_strength = tea5767_get_rf_strength,
+};
+
+struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe,
+ struct i2c_adapter* i2c_adap,
+ u8 i2c_addr)
+{
+ struct tea5767_priv *priv = NULL;
+
+ priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return NULL;
+ fe->tuner_priv = priv;
+
+ priv->i2c_props.addr = i2c_addr;
+ priv->i2c_props.adap = i2c_adap;
+ priv->i2c_props.name = "tea5767";
+
+ priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768;
+ priv->ctrl.port1 = 1;
+ priv->ctrl.port2 = 1;
+ priv->ctrl.high_cut = 1;
+ priv->ctrl.st_noise = 1;
+ priv->ctrl.japan_band = 1;
+
+ memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
+
+ return fe;
+}
+
+EXPORT_SYMBOL_GPL(tea5767_attach);
+EXPORT_SYMBOL_GPL(tea5767_autodetection);
+
+MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
+MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff