--- /dev/null
+/* cx25840 audio functions
+ *
+ * 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 <linux/videodev2.h>
+#include <linux/i2c.h>
+#include <media/v4l2-common.h>
+#include <media/cx25840.h>
+
+#include "cx25840-core.h"
+
+static int set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ struct cx25840_state *state = i2c_get_clientdata(client);
+
+ if (freq != 32000 && freq != 44100 && freq != 48000)
+ return -EINVAL;
+
+ /* assert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x01);
+
+ /* common for all inputs and rates */
+ /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ switch (freq) {
+ case 32000:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f040610);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0xee39bb01);
+
+ /* src3/4/6_ctl = 0x0801f77f */
+ cx25840_write4(client, 0x900, 0x7ff70108);
+ cx25840_write4(client, 0x904, 0x7ff70108);
+ cx25840_write4(client, 0x90c, 0x7ff70108);
+ break;
+
+ case 44100:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f040910);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0xd66bec00);
+
+ /* src3/4/6_ctl = 0x08016d59 */
+ cx25840_write4(client, 0x900, 0x596d0108);
+ cx25840_write4(client, 0x904, 0x596d0108);
+ cx25840_write4(client, 0x90c, 0x596d0108);
+ break;
+
+ case 48000:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f040a10);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0xe5d69800);
+
+ /* src3/4/6_ctl = 0x08014faa */
+ cx25840_write4(client, 0x900, 0xaa4f0108);
+ cx25840_write4(client, 0x904, 0xaa4f0108);
+ cx25840_write4(client, 0x90c, 0xaa4f0108);
+ break;
+ }
+ } else {
+ switch (freq) {
+ case 32000:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f04081e);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0x69082a01);
+
+ /* src1_ctl = 0x08010000 */
+ cx25840_write4(client, 0x8f8, 0x00000108);
+
+ /* src3/4/6_ctl = 0x08020000 */
+ cx25840_write4(client, 0x900, 0x00000208);
+ cx25840_write4(client, 0x904, 0x00000208);
+ cx25840_write4(client, 0x90c, 0x00000208);
+
+ /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
+ cx25840_write(client, 0x127, 0x54);
+ break;
+
+ case 44100:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f040918);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0xd66bec00);
+
+ /* src1_ctl = 0x08010000 */
+ cx25840_write4(client, 0x8f8, 0xcd600108);
+
+ /* src3/4/6_ctl = 0x08020000 */
+ cx25840_write4(client, 0x900, 0x85730108);
+ cx25840_write4(client, 0x904, 0x85730108);
+ cx25840_write4(client, 0x90c, 0x85730108);
+ break;
+
+ case 48000:
+ /* VID_PLL and AUX_PLL */
+ cx25840_write4(client, 0x108, 0x0f040a18);
+
+ /* AUX_PLL_FRAC */
+ cx25840_write4(client, 0x110, 0xe5d69800);
+
+ /* src1_ctl = 0x08010000 */
+ cx25840_write4(client, 0x8f8, 0x00800108);
+
+ /* src3/4/6_ctl = 0x08020000 */
+ cx25840_write4(client, 0x900, 0x55550108);
+ cx25840_write4(client, 0x904, 0x55550108);
+ cx25840_write4(client, 0x90c, 0x55550108);
+ break;
+ }
+ }
+
+ /* deassert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x00);
+
+ state->audclk_freq = freq;
+
+ return 0;
+}
+
+void cx25840_audio_set_path(struct i2c_client *client)
+{
+ struct cx25840_state *state = i2c_get_clientdata(client);
+
+ /* stop microcontroller */
+ cx25840_and_or(client, 0x803, ~0x10, 0);
+
+ /* Mute everything to prevent the PFFT! */
+ cx25840_write(client, 0x8d3, 0x1f);
+
+ if (state->aud_input == CX25840_AUDIO_SERIAL) {
+ /* Set Path1 to Serial Audio Input */
+ cx25840_write4(client, 0x8d0, 0x12100101);
+
+ /* 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 */
+ cx25840_write4(client, 0x8d0, 0x7038061f);
+
+ /* When the microcontroller detects the
+ * audio format, it will unmute the lines */
+ cx25840_and_or(client, 0x803, ~0x10, 0x10);
+ }
+
+ set_audclk_freq(client, state->audclk_freq);
+}
+
+static int get_volume(struct i2c_client *client)
+{
+ /* Volume runs +18dB to -96dB in 1/2dB steps
+ * change to fit the msp3400 -114dB to +12dB range */
+
+ /* check PATH1_VOLUME */
+ int vol = 228 - cx25840_read(client, 0x8d4);
+ vol = (vol / 2) + 23;
+ return vol << 9;
+}
+
+static void set_volume(struct i2c_client *client, int volume)
+{
+ /* First convert the volume to msp3400 values (0-127) */
+ int vol = volume >> 9;
+ /* now scale it up to cx25840 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 */
+ cx25840_write(client, 0x8d4, 228 - (vol * 2));
+}
+
+static int get_bass(struct i2c_client *client)
+{
+ /* bass is 49 steps +12dB to -12dB */
+
+ /* check PATH1_EQ_BASS_VOL */
+ int bass = cx25840_read(client, 0x8d9) & 0x3f;
+ bass = (((48 - bass) * 0xffff) + 47) / 48;
+ return bass;
+}
+
+static void set_bass(struct i2c_client *client, int bass)
+{
+ /* PATH1_EQ_BASS_VOL */
+ cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
+}
+
+static int get_treble(struct i2c_client *client)
+{
+ /* treble is 49 steps +12dB to -12dB */
+
+ /* check PATH1_EQ_TREBLE_VOL */
+ int treble = cx25840_read(client, 0x8db) & 0x3f;
+ treble = (((48 - treble) * 0xffff) + 47) / 48;
+ return treble;
+}
+
+static void set_treble(struct i2c_client *client, int treble)
+{
+ /* PATH1_EQ_TREBLE_VOL */
+ cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
+}
+
+static int get_balance(struct i2c_client *client)
+{
+ /* balance is 7 bit, 0 to -96dB */
+
+ /* check PATH1_BAL_LEVEL */
+ int balance = cx25840_read(client, 0x8d5) & 0x7f;
+ /* check PATH1_BAL_LEFT */
+ if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
+ balance = 0x80 - balance;
+ else
+ balance = 0x80 + balance;
+ return balance << 8;
+}
+
+static void set_balance(struct i2c_client *client, int balance)
+{
+ int bal = balance >> 8;
+ if (bal > 0x80) {
+ /* PATH1_BAL_LEFT */
+ cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
+ /* PATH1_BAL_LEVEL */
+ cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
+ } else {
+ /* PATH1_BAL_LEFT */
+ cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
+ /* PATH1_BAL_LEVEL */
+ cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
+ }
+}
+
+static int get_mute(struct i2c_client *client)
+{
+ /* check SRC1_MUTE_EN */
+ return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
+}
+
+static void set_mute(struct i2c_client *client, int mute)
+{
+ struct cx25840_state *state = i2c_get_clientdata(client);
+
+ if (state->aud_input != CX25840_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 */
+ cx25840_and_or(client, 0x803, ~0x10, 0x00);
+ cx25840_write(client, 0x8d3, 0x1f);
+ } else {
+ /* enable microcontroller */
+ cx25840_and_or(client, 0x803, ~0x10, 0x10);
+ }
+ } else {
+ /* SRC1_MUTE_EN */
+ cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
+ }
+}
+
+int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+ struct v4l2_control *ctrl = arg;
+
+ switch (cmd) {
+ case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+ return set_audclk_freq(client, *(u32 *)arg);
+
+ case VIDIOC_G_CTRL:
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ ctrl->value = get_volume(client);
+ break;
+ case V4L2_CID_AUDIO_BASS:
+ ctrl->value = get_bass(client);
+ break;
+ case V4L2_CID_AUDIO_TREBLE:
+ ctrl->value = get_treble(client);
+ break;
+ case V4L2_CID_AUDIO_BALANCE:
+ ctrl->value = get_balance(client);
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = get_mute(client);
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+
+ case VIDIOC_S_CTRL:
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ set_volume(client, ctrl->value);
+ break;
+ case V4L2_CID_AUDIO_BASS:
+ set_bass(client, ctrl->value);
+ break;
+ case V4L2_CID_AUDIO_TREBLE:
+ set_treble(client, ctrl->value);
+ break;
+ case V4L2_CID_AUDIO_BALANCE:
+ set_balance(client, ctrl->value);
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ set_mute(client, ctrl->value);
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
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