1 files changed, 324 insertions, 0 deletions

diff --git a/drivers/media/common/tuners/tea5761.c b/drivers/media/common/tuners/tea5761.c
new file mode 100644
index 000000000000..b93cdef9ac73
--- /dev/null
+++ b/drivers/media/common/tuners/tea5761.c
@@ -0,0 +1,324 @@
+/*
+ * 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/delay.h>
+#include <linux/videodev.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;
+};
+
+/*****************************************************************************/
+
+/***************************
+ * 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,
+                          struct analog_parameters *params)
+{
+        struct tea5761_priv *priv = fe->tuner_priv;
+        unsigned int frq = params->frequency;
+        unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
+        unsigned div;
+        int rc;
+
+        tuner_dbg("radio freq counter %d\n", frq);
+
+        if (params->mode == T_STANDBY) {
+                tuner_dbg("TEA5761 set to standby mode\n");
+                buffer[5] |= TEA5761_TNCTRL_MU;
+        } else {
+                buffer[4] |= TEA5761_TNCTRL_PUPD_0;
+        }
+
+
+        if (params->audmode == V4L2_TUNER_MODE_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 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,
+        .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) == EINVAL)
+                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");