Initial import

1 files changed, 348 insertions, 0 deletions

diff --git a/drivers/media/tuners/tea5761.c b/drivers/media/tuners/tea5761.c
new file mode 100644
index 000000000..bf78cb9fc
--- /dev/null
+++ b/drivers/media/tuners/tea5761.c
@@ -0,0 +1,348 @@
+/*
+ * For Philips TEA5761 FM Chip
+ * I2C address is allways 0x20 (0x10 at 7-bit mode).
+ *
+ * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
+ * This code is placed under the terms of the GNUv2 General Public License
+ *
+ */
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <media/tuner.h>
+#include "tuner-i2c.h"
+#include "tea5761.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable verbose debug messages");
+
+struct tea5761_priv {
+	struct tuner_i2c_props i2c_props;
+
+	u32 frequency;
+	bool standby;
+};
+
+/*****************************************************************************/
+
+/***************************
+ * TEA5761HN I2C registers *
+ ***************************/
+
+/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
+
+	/* first byte for reading */
+#define TEA5761_INTREG_IFFLAG		0x10
+#define TEA5761_INTREG_LEVFLAG		0x8
+#define TEA5761_INTREG_FRRFLAG		0x2
+#define TEA5761_INTREG_BLFLAG		0x1
+
+	/* second byte for reading / byte for writing */
+#define TEA5761_INTREG_IFMSK		0x10
+#define TEA5761_INTREG_LEVMSK		0x8
+#define TEA5761_INTREG_FRMSK		0x2
+#define TEA5761_INTREG_BLMSK		0x1
+
+/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
+
+	/* First byte */
+#define TEA5761_FRQSET_SEARCH_UP 0x80		/* 1=Station search from botton to up */
+#define TEA5761_FRQSET_SEARCH_MODE 0x40		/* 1=Search mode */
+
+	/* Bits 0-5 for divider MSB */
+
+	/* Second byte */
+	/* Bits 0-7 for divider LSB */
+
+/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
+
+	/* first byte */
+
+#define TEA5761_TNCTRL_PUPD_0	0x40	/* Power UP/Power Down MSB */
+#define TEA5761_TNCTRL_BLIM	0X20	/* 1= Japan Frequencies, 0= European frequencies */
+#define TEA5761_TNCTRL_SWPM	0x10	/* 1= software port is FRRFLAG */
+#define TEA5761_TNCTRL_IFCTC	0x08	/* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
+#define TEA5761_TNCTRL_AFM	0x04
+#define TEA5761_TNCTRL_SMUTE	0x02	/* 1= Soft mute */
+#define TEA5761_TNCTRL_SNC	0x01
+
+	/* second byte */
+
+#define TEA5761_TNCTRL_MU	0x80	/* 1=Hard mute */
+#define TEA5761_TNCTRL_SSL_1	0x40
+#define TEA5761_TNCTRL_SSL_0	0x20
+#define TEA5761_TNCTRL_HLSI	0x10
+#define TEA5761_TNCTRL_MST	0x08	/* 1 = mono */
+#define TEA5761_TNCTRL_SWP	0x04
+#define TEA5761_TNCTRL_DTC	0x02	/* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
+#define TEA5761_TNCTRL_AHLSI	0x01
+
+/* FRQCHECK - Read: bytes 6 and 7  */
+	/* First byte */
+
+	/* Bits 0-5 for divider MSB */
+
+	/* Second byte */
+	/* Bits 0-7 for divider LSB */
+
+/* TUNCHECK - Read: bytes 8 and 9  */
+
+	/* First byte */
+#define TEA5761_TUNCHECK_IF_MASK	0x7e	/* IF count */
+#define TEA5761_TUNCHECK_TUNTO		0x01
+
+	/* Second byte */
+#define TEA5761_TUNCHECK_LEV_MASK	0xf0	/* Level Count */
+#define TEA5761_TUNCHECK_LD		0x08
+#define TEA5761_TUNCHECK_STEREO		0x04
+
+/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
+
+	/* All zero = no test mode */
+
+/* MANID - Read: bytes 12 and 13 */
+
+	/* First byte - should be 0x10 */
+#define TEA5767_MANID_VERSION_MASK	0xf0	/* Version = 1 */
+#define TEA5767_MANID_ID_MSB_MASK	0x0f	/* Manufacurer ID - should be 0 */
+
+	/* Second byte - Should be 0x2b */
+
+#define TEA5767_MANID_ID_LSB_MASK	0xfe	/* Manufacturer ID - should be 0x15 */
+#define TEA5767_MANID_IDAV		0x01	/* 1 = Chip has ID, 0 = Chip has no ID */
+
+/* Chip ID - Read: bytes 14 and 15 */
+
+	/* First byte - should be 0x57 */
+
+	/* Second byte - should be 0x61 */
+
+/*****************************************************************************/
+
+#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
+static void tea5761_status_dump(unsigned char *buffer)
+{
+	unsigned int div, frq;
+
+	div = ((buffer[2] & 0x3f) << 8) | buffer[3];
+
+	frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4;	/* Freq in KHz */
+
+	printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
+	       frq / 1000, frq % 1000, div);
+}
+
+/* Freq should be specifyed at 62.5 Hz */
+static int __set_radio_freq(struct dvb_frontend *fe,
+			    unsigned int freq,
+			    bool mono)
+{
+	struct tea5761_priv *priv = fe->tuner_priv;
+	unsigned int frq = freq;
+	unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
+	unsigned div;
+	int rc;
+
+	tuner_dbg("radio freq counter %d\n", frq);
+
+	if (priv->standby) {
+		tuner_dbg("TEA5761 set to standby mode\n");
+		buffer[5] |= TEA5761_TNCTRL_MU;
+	} else {
+		buffer[4] |= TEA5761_TNCTRL_PUPD_0;
+	}
+
+
+	if (mono) {
+		tuner_dbg("TEA5761 set to mono\n");
+		buffer[5] |= TEA5761_TNCTRL_MST;
+	} else {
+		tuner_dbg("TEA5761 set to stereo\n");
+	}
+
+	div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
+	buffer[1] = (div >> 8) & 0x3f;
+	buffer[2] = div & 0xff;
+
+	if (debug)
+		tea5761_status_dump(buffer);
+
+	if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
+		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
+
+	priv->frequency = frq * 125 / 2;
+
+	return 0;
+}
+
+static int set_radio_freq(struct dvb_frontend *fe,
+			  struct analog_parameters *params)
+{
+	struct tea5761_priv *priv = fe->analog_demod_priv;
+
+	priv->standby = false;
+
+	return __set_radio_freq(fe, params->frequency,
+				params->audmode == V4L2_TUNER_MODE_MONO);
+}
+
+static int set_radio_sleep(struct dvb_frontend *fe)
+{
+	struct tea5761_priv *priv = fe->analog_demod_priv;
+
+	priv->standby = true;
+
+	return __set_radio_freq(fe, priv->frequency, false);
+}
+
+static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
+{
+	struct tea5761_priv *priv = fe->tuner_priv;
+	int rc;
+
+	memset(buffer, 0, 16);
+	if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
+		tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
+		return -EREMOTEIO;
+	}
+
+	return 0;
+}
+
+static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
+{
+	struct tea5761_priv *priv = fe->tuner_priv;
+
+	int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
+
+	tuner_dbg("Signal strength: %d\n", signal);
+
+	return signal;
+}
+
+static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
+{
+	struct tea5761_priv *priv = fe->tuner_priv;
+
+	int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
+
+	tuner_dbg("Radio ST GET = %02x\n", stereo);
+
+	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
+}
+
+static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
+{
+	unsigned char buffer[16];
+
+	*status = 0;
+
+	if (0 == tea5761_read_status(fe, buffer)) {
+		if (tea5761_signal(fe, buffer))
+			*status = TUNER_STATUS_LOCKED;
+		if (tea5761_stereo(fe, buffer))
+			*status |= TUNER_STATUS_STEREO;
+	}
+
+	return 0;
+}
+
+static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	unsigned char buffer[16];
+
+	*strength = 0;
+
+	if (0 == tea5761_read_status(fe, buffer))
+		*strength = tea5761_signal(fe, buffer);
+
+	return 0;
+}
+
+int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
+{
+	unsigned char buffer[16];
+	int rc;
+	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
+
+	if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
+		printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
+		return -EINVAL;
+	}
+
+	if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) {
+		printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
+				    " It is not a TEA5761\n",
+				    buffer[13], buffer[14], buffer[15]);
+		return -EINVAL;
+	}
+	printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
+			    "Manufacturer ID= 0x%02x\n",
+			    buffer[14], buffer[15], buffer[13]);
+
+	return 0;
+}
+
+static int tea5761_release(struct dvb_frontend *fe)
+{
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+
+	return 0;
+}
+
+static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct tea5761_priv *priv = fe->tuner_priv;
+	*frequency = priv->frequency;
+	return 0;
+}
+
+static struct dvb_tuner_ops tea5761_tuner_ops = {
+	.info = {
+		.name           = "tea5761", // Philips TEA5761HN FM Radio
+	},
+	.set_analog_params = set_radio_freq,
+	.sleep		   = set_radio_sleep,
+	.release           = tea5761_release,
+	.get_frequency     = tea5761_get_frequency,
+	.get_status        = tea5761_get_status,
+	.get_rf_strength   = tea5761_get_rf_strength,
+};
+
+struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
+				    struct i2c_adapter* i2c_adap,
+				    u8 i2c_addr)
+{
+	struct tea5761_priv *priv = NULL;
+
+	if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
+		return NULL;
+
+	priv = kzalloc(sizeof(struct tea5761_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 = "tea5761";
+
+	memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
+	       sizeof(struct dvb_tuner_ops));
+
+	tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
+
+	return fe;
+}
+
+
+EXPORT_SYMBOL_GPL(tea5761_attach);
+EXPORT_SYMBOL_GPL(tea5761_autodetection);
+
+MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
+MODULE_LICENSE("GPL");