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path: root/drivers/media/tuners/tea5761.c
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Diffstat (limited to 'drivers/media/tuners/tea5761.c')
-rw-r--r--drivers/media/tuners/tea5761.c348
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 000000000000..bf78cb9fc52c
--- /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");