Initial import

1 files changed, 475 insertions, 0 deletions

diff --git a/drivers/media/tuners/tea5767.c b/drivers/media/tuners/tea5767.c
new file mode 100644
index 000000000..36e85d81a
--- /dev/null
+++ b/drivers/media/tuners/tea5767.c
@@ -0,0 +1,475 @@
+/*
+ * 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/slab.h>
+#include <linux/delay.h>
+#include <linux/videodev2.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");