From c7e5d78241699500b18ce783607af7ae52ee021f Mon Sep 17 00:00:00 2001
From: Marcoen Hirschberg <marcoen@gmail.com>
Date: Thu, 27 Mar 2008 11:29:24 +0000
Subject: initial Meizu M6SL port

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16844 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/tuner/tea5760uk.c | 135 +++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 firmware/drivers/tuner/tea5760uk.c

(limited to 'firmware/drivers/tuner/tea5760uk.c')

diff --git a/firmware/drivers/tuner/tea5760uk.c b/firmware/drivers/tuner/tea5760uk.c
new file mode 100644
index 0000000000..8ac6cb2dbc
--- /dev/null
+++ b/firmware/drivers/tuner/tea5760uk.c
@@ -0,0 +1,135 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ * Tuner "middleware" for Philips TEA5760 chip
+ *
+ * Copyright (C) 2004 Jörg Hohensohn
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+#include "kernel.h"
+#include "tuner.h" /* tuner abstraction interface */
+#include "fmradio.h"
+#include "fmradio_i2c.h" /* physical interface driver */
+
+#define I2C_ADR 0xC0
+static unsigned char write_bytes[7] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+static void tea5760uk_set_clear(int byte, unsigned char bits, int set)
+{
+    write_bytes[byte] &= ~bits;
+    if (set)
+        write_bytes[byte] |= bits;
+}
+
+/* tuner abstraction layer: set something to the tuner */
+int tea5760uk_set(int setting, int value)
+{
+    switch(setting)
+    {
+        case RADIO_SLEEP:
+            /* init values */
+            write_bytes[0] |= (1<<7); /* mute */
+#if CONFIG_TUNER_XTAL == 32768
+            /* 32.768kHz, soft mute, stereo noise cancelling */
+            write_bytes[3] |= (1<<4) | (1<<3) | (1<<1);
+#else
+            /* soft mute, stereo noise cancelling */
+            write_bytes[3] |= (1<<3) | (1<<1); 
+#endif
+            /* sleep / standby mode */
+            tea5760uk_set_clear(3, (1<<6), value);
+            break;
+
+        case RADIO_FREQUENCY:
+            {
+                int n;
+#if CONFIG_TUNER_XTAL == 32768
+                n = (4 * (value - 225000) + 16384) / 32768;
+#else
+                n = (4 * (value - 225000)) / 50000;
+#endif
+                write_bytes[6] = (write_bytes[6] & 0xC0) | (n >> 8);
+                write_bytes[7] = n;
+            }
+            break;
+
+        case RADIO_SCAN_FREQUENCY:
+            tea5760uk_set(RADIO_FREQUENCY, value);
+            sleep(HZ/30);
+            return tea5760uk_get(RADIO_TUNED);
+
+        case RADIO_MUTE:
+            tea5760uk_set_clear(3, (1<<2), value);
+            break;
+
+        case RADIO_REGION:
+        {
+            const struct tea5760uk_region_data *rd =
+                &tea5760uk_region_data[value];
+
+            tea5760uk_set_clear(4, (1<<1), rd->deemphasis);
+            tea5760uk_set_clear(3, (1<<5), rd->band);
+            break;
+            }
+        case RADIO_FORCE_MONO:
+            tea5760uk_set_clear(4, (1<<3), value);
+            break;
+        default:
+            return -1;
+    }
+
+    fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes));
+    return 1;
+}
+
+/* tuner abstraction layer: read something from the tuner */
+int tea5760uk_get(int setting)
+{
+    unsigned char read_bytes[16];
+    int val = -1; /* default for unsupported query */
+
+    fmradio_i2c_read(I2C_ADR, read_bytes, sizeof(read_bytes));
+
+    switch(setting)
+    {
+        case RADIO_PRESENT:
+            val = 1; /* true */
+            break;
+
+        case RADIO_TUNED:
+            val = 0;
+            if (read_bytes[0] & (1<<4)) /* IF count correct */
+            {
+                val = read_bytes[8] >> 1; /* IF counter */
+                val = (abs(val - 0x36) < 2); /* close match */
+            }
+            break;
+
+        case RADIO_STEREO:
+            val = read_bytes[9] >> 2;
+            break;
+    }
+
+    return val;
+}
+
+void tea5760uk_dbg_info(struct tea5760uk_dbg_info *info)
+{
+    fmradio_i2c_read(I2C_ADR, info->read_regs, 5);
+    memcpy(info->write_regs, write_bytes, 5);
+}
-- 
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