1 files changed, 361 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-av-audio.c b/drivers/media/video/cx18/cx18-av-audio.c
new file mode 100644
index 000000000000..2dc3a5dd170e
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-av-audio.c
@@ -0,0 +1,361 @@
+/*
+ *  cx18 ADEC audio functions
+ *
+ *  Derived from cx25840-audio.c
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#include "cx18-driver.h"
+
+static int set_audclk_freq(struct cx18 *cx, u32 freq)
+{
+	struct cx18_av_state *state = &cx->av_state;
+
+	if (freq != 32000 && freq != 44100 && freq != 48000)
+		return -EINVAL;
+
+	/* common for all inputs and rates */
+	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
+	cx18_av_write(cx, 0x127, 0x50);
+
+	if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
+		switch (freq) {
+		case 32000:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x1006040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x01bb39ee);
+
+			/* src3/4/6_ctl = 0x0801f77f */
+			cx18_av_write4(cx, 0x900, 0x0801f77f);
+			cx18_av_write4(cx, 0x904, 0x0801f77f);
+			cx18_av_write4(cx, 0x90c, 0x0801f77f);
+			break;
+
+		case 44100:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x1009040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x00ec6bd6);
+
+			/* src3/4/6_ctl = 0x08016d59 */
+			cx18_av_write4(cx, 0x900, 0x08016d59);
+			cx18_av_write4(cx, 0x904, 0x08016d59);
+			cx18_av_write4(cx, 0x90c, 0x08016d59);
+			break;
+
+		case 48000:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x100a040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x0098d6e5);
+
+			/* src3/4/6_ctl = 0x08014faa */
+			cx18_av_write4(cx, 0x900, 0x08014faa);
+			cx18_av_write4(cx, 0x904, 0x08014faa);
+			cx18_av_write4(cx, 0x90c, 0x08014faa);
+			break;
+		}
+	} else {
+		switch (freq) {
+		case 32000:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x1e08040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x012a0869);
+
+			/* src1_ctl = 0x08010000 */
+			cx18_av_write4(cx, 0x8f8, 0x08010000);
+
+			/* src3/4/6_ctl = 0x08020000 */
+			cx18_av_write4(cx, 0x900, 0x08020000);
+			cx18_av_write4(cx, 0x904, 0x08020000);
+			cx18_av_write4(cx, 0x90c, 0x08020000);
+
+			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
+			cx18_av_write(cx, 0x127, 0x54);
+			break;
+
+		case 44100:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x1809040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x00ec6bd6);
+
+			/* src1_ctl = 0x08010000 */
+			cx18_av_write4(cx, 0x8f8, 0x080160cd);
+
+			/* src3/4/6_ctl = 0x08020000 */
+			cx18_av_write4(cx, 0x900, 0x08017385);
+			cx18_av_write4(cx, 0x904, 0x08017385);
+			cx18_av_write4(cx, 0x90c, 0x08017385);
+			break;
+
+		case 48000:
+			/* VID_PLL and AUX_PLL */
+			cx18_av_write4(cx, 0x108, 0x180a040f);
+
+			/* AUX_PLL_FRAC */
+			cx18_av_write4(cx, 0x110, 0x0098d6e5);
+
+			/* src1_ctl = 0x08010000 */
+			cx18_av_write4(cx, 0x8f8, 0x08018000);
+
+			/* src3/4/6_ctl = 0x08020000 */
+			cx18_av_write4(cx, 0x900, 0x08015555);
+			cx18_av_write4(cx, 0x904, 0x08015555);
+			cx18_av_write4(cx, 0x90c, 0x08015555);
+			break;
+		}
+	}
+
+	state->audclk_freq = freq;
+
+	return 0;
+}
+
+void cx18_av_audio_set_path(struct cx18 *cx)
+{
+	struct cx18_av_state *state = &cx->av_state;
+
+	/* stop microcontroller */
+	cx18_av_and_or(cx, 0x803, ~0x10, 0);
+
+	/* assert soft reset */
+	cx18_av_and_or(cx, 0x810, ~0x1, 0x01);
+
+	/* Mute everything to prevent the PFFT! */
+	cx18_av_write(cx, 0x8d3, 0x1f);
+
+	if (state->aud_input == CX18_AV_AUDIO_SERIAL) {
+		/* Set Path1 to Serial Audio Input */
+		cx18_av_write4(cx, 0x8d0, 0x01011012);
+
+		/* The microcontroller should not be started for the
+		 * non-tuner inputs: autodetection is specific for
+		 * TV audio. */
+	} else {
+		/* Set Path1 to Analog Demod Main Channel */
+		cx18_av_write4(cx, 0x8d0, 0x1f063870);
+	}
+
+	set_audclk_freq(cx, state->audclk_freq);
+
+	/* deassert soft reset */
+	cx18_av_and_or(cx, 0x810, ~0x1, 0x00);
+
+	if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
+		/* When the microcontroller detects the
+		 * audio format, it will unmute the lines */
+		cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
+	}
+}
+
+static int get_volume(struct cx18 *cx)
+{
+	/* Volume runs +18dB to -96dB in 1/2dB steps
+	 * change to fit the msp3400 -114dB to +12dB range */
+
+	/* check PATH1_VOLUME */
+	int vol = 228 - cx18_av_read(cx, 0x8d4);
+	vol = (vol / 2) + 23;
+	return vol << 9;
+}
+
+static void set_volume(struct cx18 *cx, int volume)
+{
+	/* First convert the volume to msp3400 values (0-127) */
+	int vol = volume >> 9;
+	/* now scale it up to cx18_av values
+	 * -114dB to -96dB maps to 0
+	 * this should be 19, but in my testing that was 4dB too loud */
+	if (vol <= 23)
+		vol = 0;
+	else
+		vol -= 23;
+
+	/* PATH1_VOLUME */
+	cx18_av_write(cx, 0x8d4, 228 - (vol * 2));
+}
+
+static int get_bass(struct cx18 *cx)
+{
+	/* bass is 49 steps +12dB to -12dB */
+
+	/* check PATH1_EQ_BASS_VOL */
+	int bass = cx18_av_read(cx, 0x8d9) & 0x3f;
+	bass = (((48 - bass) * 0xffff) + 47) / 48;
+	return bass;
+}
+
+static void set_bass(struct cx18 *cx, int bass)
+{
+	/* PATH1_EQ_BASS_VOL */
+	cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
+}
+
+static int get_treble(struct cx18 *cx)
+{
+	/* treble is 49 steps +12dB to -12dB */
+
+	/* check PATH1_EQ_TREBLE_VOL */
+	int treble = cx18_av_read(cx, 0x8db) & 0x3f;
+	treble = (((48 - treble) * 0xffff) + 47) / 48;
+	return treble;
+}
+
+static void set_treble(struct cx18 *cx, int treble)
+{
+	/* PATH1_EQ_TREBLE_VOL */
+	cx18_av_and_or(cx, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
+}
+
+static int get_balance(struct cx18 *cx)
+{
+	/* balance is 7 bit, 0 to -96dB */
+
+	/* check PATH1_BAL_LEVEL */
+	int balance = cx18_av_read(cx, 0x8d5) & 0x7f;
+	/* check PATH1_BAL_LEFT */
+	if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0)
+		balance = 0x80 - balance;
+	else
+		balance = 0x80 + balance;
+	return balance << 8;
+}
+
+static void set_balance(struct cx18 *cx, int balance)
+{
+	int bal = balance >> 8;
+	if (bal > 0x80) {
+		/* PATH1_BAL_LEFT */
+		cx18_av_and_or(cx, 0x8d5, 0x7f, 0x80);
+		/* PATH1_BAL_LEVEL */
+		cx18_av_and_or(cx, 0x8d5, ~0x7f, bal & 0x7f);
+	} else {
+		/* PATH1_BAL_LEFT */
+		cx18_av_and_or(cx, 0x8d5, 0x7f, 0x00);
+		/* PATH1_BAL_LEVEL */
+		cx18_av_and_or(cx, 0x8d5, ~0x7f, 0x80 - bal);
+	}
+}
+
+static int get_mute(struct cx18 *cx)
+{
+	/* check SRC1_MUTE_EN */
+	return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0;
+}
+
+static void set_mute(struct cx18 *cx, int mute)
+{
+	struct cx18_av_state *state = &cx->av_state;
+
+	if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
+		/* Must turn off microcontroller in order to mute sound.
+		 * Not sure if this is the best method, but it does work.
+		 * If the microcontroller is running, then it will undo any
+		 * changes to the mute register. */
+		if (mute) {
+			/* disable microcontroller */
+			cx18_av_and_or(cx, 0x803, ~0x10, 0x00);
+			cx18_av_write(cx, 0x8d3, 0x1f);
+		} else {
+			/* enable microcontroller */
+			cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
+		}
+	} else {
+		/* SRC1_MUTE_EN */
+		cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
+	}
+}
+
+int cx18_av_audio(struct cx18 *cx, unsigned int cmd, void *arg)
+{
+	struct cx18_av_state *state = &cx->av_state;
+	struct v4l2_control *ctrl = arg;
+	int retval;
+
+	switch (cmd) {
+	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+		if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
+			cx18_av_and_or(cx, 0x803, ~0x10, 0);
+			cx18_av_write(cx, 0x8d3, 0x1f);
+		}
+		cx18_av_and_or(cx, 0x810, ~0x1, 1);
+		retval = set_audclk_freq(cx, *(u32 *)arg);
+		cx18_av_and_or(cx, 0x810, ~0x1, 0);
+		if (state->aud_input != CX18_AV_AUDIO_SERIAL)
+			cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
+		return retval;
+
+	case VIDIOC_G_CTRL:
+		switch (ctrl->id) {
+		case V4L2_CID_AUDIO_VOLUME:
+			ctrl->value = get_volume(cx);
+			break;
+		case V4L2_CID_AUDIO_BASS:
+			ctrl->value = get_bass(cx);
+			break;
+		case V4L2_CID_AUDIO_TREBLE:
+			ctrl->value = get_treble(cx);
+			break;
+		case V4L2_CID_AUDIO_BALANCE:
+			ctrl->value = get_balance(cx);
+			break;
+		case V4L2_CID_AUDIO_MUTE:
+			ctrl->value = get_mute(cx);
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+
+	case VIDIOC_S_CTRL:
+		switch (ctrl->id) {
+		case V4L2_CID_AUDIO_VOLUME:
+			set_volume(cx, ctrl->value);
+			break;
+		case V4L2_CID_AUDIO_BASS:
+			set_bass(cx, ctrl->value);
+			break;
+		case V4L2_CID_AUDIO_TREBLE:
+			set_treble(cx, ctrl->value);
+			break;
+		case V4L2_CID_AUDIO_BALANCE:
+			set_balance(cx, ctrl->value);
+			break;
+		case V4L2_CID_AUDIO_MUTE:
+			set_mute(cx, ctrl->value);
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}