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Diffstat (limited to 'drivers/media/i2c/cx25840/cx25840-audio.c')
-rw-r--r--drivers/media/i2c/cx25840/cx25840-audio.c558
1 files changed, 558 insertions, 0 deletions
diff --git a/drivers/media/i2c/cx25840/cx25840-audio.c b/drivers/media/i2c/cx25840/cx25840-audio.c
new file mode 100644
index 000000000..eb77ba088
--- /dev/null
+++ b/drivers/media/i2c/cx25840/cx25840-audio.c
@@ -0,0 +1,558 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* cx25840 audio functions
+ */
+
+
+#include <linux/videodev2.h>
+#include <linux/i2c.h>
+#include <media/v4l2-common.h>
+#include <media/drv-intf/cx25840.h>
+
+#include "cx25840-core.h"
+
+/*
+ * Note: The PLL and SRC parameters are based on a reference frequency that
+ * would ideally be:
+ *
+ * NTSC Color subcarrier freq * 8 = 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
+ *
+ * However, it's not the exact reference frequency that matters, only that the
+ * firmware and modules that comprise the driver for a particular board all
+ * use the same value (close to the ideal value).
+ *
+ * Comments below will note which reference frequency is assumed for various
+ * parameters. They will usually be one of
+ *
+ * ref_freq = 28.636360 MHz
+ * or
+ * ref_freq = 28.636363 MHz
+ */
+
+static int cx25840_set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ struct cx25840_state *state = to_state(i2c_get_clientdata(client));
+
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ switch (freq) {
+ case 32000:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x06, AUX PLL Post Divider = 0x10
+ */
+ cx25840_write4(client, 0x108, 0x1006040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x1bb39ee
+ * 28636363 * 0x6.dd9cf70/0x10 = 32000 * 384
+ * 196.6 MHz pre-postdivide
+ * FIXME < 200 MHz is out of specified valid range
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x01bb39ee);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src3/4/6_ctl */
+ /* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
+ cx25840_write4(client, 0x900, 0x0801f77f);
+ cx25840_write4(client, 0x904, 0x0801f77f);
+ cx25840_write4(client, 0x90c, 0x0801f77f);
+ break;
+
+ case 44100:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x10
+ */
+ cx25840_write4(client, 0x108, 0x1009040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x0ec6bd6
+ * 28636363 * 0x9.7635eb0/0x10 = 44100 * 384
+ * 271 MHz pre-postdivide
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x00ec6bd6);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src3/4/6_ctl */
+ /* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
+ cx25840_write4(client, 0x900, 0x08016d59);
+ cx25840_write4(client, 0x904, 0x08016d59);
+ cx25840_write4(client, 0x90c, 0x08016d59);
+ break;
+
+ case 48000:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x10
+ */
+ cx25840_write4(client, 0x108, 0x100a040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x098d6e5
+ * 28636363 * 0xa.4c6b728/0x10 = 48000 * 384
+ * 295 MHz pre-postdivide
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x0098d6e5);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src3/4/6_ctl */
+ /* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
+ cx25840_write4(client, 0x900, 0x08014faa);
+ cx25840_write4(client, 0x904, 0x08014faa);
+ cx25840_write4(client, 0x90c, 0x08014faa);
+ break;
+ }
+ } else {
+ switch (freq) {
+ case 32000:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x08, AUX PLL Post Divider = 0x1e
+ */
+ cx25840_write4(client, 0x108, 0x1e08040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x12a0869
+ * 28636363 * 0x8.9504348/0x1e = 32000 * 256
+ * 246 MHz pre-postdivide
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x012a0869);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x14 = 256/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x54);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src1_ctl */
+ /* 0x1.0000 = 32000/32000 */
+ cx25840_write4(client, 0x8f8, 0x08010000);
+
+ /* src3/4/6_ctl */
+ /* 0x2.0000 = 2 * (32000/32000) */
+ cx25840_write4(client, 0x900, 0x08020000);
+ cx25840_write4(client, 0x904, 0x08020000);
+ cx25840_write4(client, 0x90c, 0x08020000);
+ break;
+
+ case 44100:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x18
+ */
+ cx25840_write4(client, 0x108, 0x1809040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x0ec6bd6
+ * 28636363 * 0x9.7635eb0/0x18 = 44100 * 256
+ * 271 MHz pre-postdivide
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x00ec6bd6);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src1_ctl */
+ /* 0x1.60cd = 44100/32000 */
+ cx25840_write4(client, 0x8f8, 0x080160cd);
+
+ /* src3/4/6_ctl */
+ /* 0x1.7385 = 2 * (32000/44100) */
+ cx25840_write4(client, 0x900, 0x08017385);
+ cx25840_write4(client, 0x904, 0x08017385);
+ cx25840_write4(client, 0x90c, 0x08017385);
+ break;
+
+ case 48000:
+ /*
+ * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
+ * AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x18
+ */
+ cx25840_write4(client, 0x108, 0x180a040f);
+
+ /*
+ * VID_PLL Fraction (register 0x10c) = 0x2be2fe
+ * 28636360 * 0xf.15f17f0/4 = 108 MHz
+ * 432 MHz pre-postdivide
+ */
+
+ /*
+ * AUX_PLL Fraction = 0x098d6e5
+ * 28636363 * 0xa.4c6b728/0x18 = 48000 * 256
+ * 295 MHz pre-postdivide
+ * FIXME 28636363 ref_freq doesn't match VID PLL ref
+ */
+ cx25840_write4(client, 0x110, 0x0098d6e5);
+
+ /*
+ * SA_MCLK_SEL = 1
+ * SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
+ */
+ cx25840_write(client, 0x127, 0x50);
+
+ if (is_cx2583x(state))
+ break;
+
+ /* src1_ctl */
+ /* 0x1.8000 = 48000/32000 */
+ cx25840_write4(client, 0x8f8, 0x08018000);
+
+ /* src3/4/6_ctl */
+ /* 0x1.5555 = 2 * (32000/48000) */
+ cx25840_write4(client, 0x900, 0x08015555);
+ cx25840_write4(client, 0x904, 0x08015555);
+ cx25840_write4(client, 0x90c, 0x08015555);
+ break;
+ }
+ }
+
+ state->audclk_freq = freq;
+
+ return 0;
+}
+
+static inline int cx25836_set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ return cx25840_set_audclk_freq(client, freq);
+}
+
+static int cx23885_set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ struct cx25840_state *state = to_state(i2c_get_clientdata(client));
+
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ switch (freq) {
+ case 32000:
+ case 44100:
+ case 48000:
+ /* We don't have register values
+ * so avoid destroying registers. */
+ /* FIXME return -EINVAL; */
+ break;
+ }
+ } else {
+ switch (freq) {
+ case 32000:
+ case 44100:
+ /* We don't have register values
+ * so avoid destroying registers. */
+ /* FIXME return -EINVAL; */
+ break;
+
+ case 48000:
+ /* src1_ctl */
+ /* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
+ cx25840_write4(client, 0x8f8, 0x0801867c);
+
+ /* src3/4/6_ctl */
+ /* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
+ cx25840_write4(client, 0x900, 0x08014faa);
+ cx25840_write4(client, 0x904, 0x08014faa);
+ cx25840_write4(client, 0x90c, 0x08014faa);
+ break;
+ }
+ }
+
+ state->audclk_freq = freq;
+
+ return 0;
+}
+
+static int cx231xx_set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ struct cx25840_state *state = to_state(i2c_get_clientdata(client));
+
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ switch (freq) {
+ case 32000:
+ /* src3/4/6_ctl */
+ /* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
+ cx25840_write4(client, 0x900, 0x0801f77f);
+ cx25840_write4(client, 0x904, 0x0801f77f);
+ cx25840_write4(client, 0x90c, 0x0801f77f);
+ break;
+
+ case 44100:
+ /* src3/4/6_ctl */
+ /* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
+ cx25840_write4(client, 0x900, 0x08016d59);
+ cx25840_write4(client, 0x904, 0x08016d59);
+ cx25840_write4(client, 0x90c, 0x08016d59);
+ break;
+
+ case 48000:
+ /* src3/4/6_ctl */
+ /* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
+ cx25840_write4(client, 0x900, 0x08014faa);
+ cx25840_write4(client, 0x904, 0x08014faa);
+ cx25840_write4(client, 0x90c, 0x08014faa);
+ break;
+ }
+ } else {
+ switch (freq) {
+ /* FIXME These cases make different assumptions about audclk */
+ case 32000:
+ /* src1_ctl */
+ /* 0x1.0000 = 32000/32000 */
+ cx25840_write4(client, 0x8f8, 0x08010000);
+
+ /* src3/4/6_ctl */
+ /* 0x2.0000 = 2 * (32000/32000) */
+ cx25840_write4(client, 0x900, 0x08020000);
+ cx25840_write4(client, 0x904, 0x08020000);
+ cx25840_write4(client, 0x90c, 0x08020000);
+ break;
+
+ case 44100:
+ /* src1_ctl */
+ /* 0x1.60cd = 44100/32000 */
+ cx25840_write4(client, 0x8f8, 0x080160cd);
+
+ /* src3/4/6_ctl */
+ /* 0x1.7385 = 2 * (32000/44100) */
+ cx25840_write4(client, 0x900, 0x08017385);
+ cx25840_write4(client, 0x904, 0x08017385);
+ cx25840_write4(client, 0x90c, 0x08017385);
+ break;
+
+ case 48000:
+ /* src1_ctl */
+ /* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
+ cx25840_write4(client, 0x8f8, 0x0801867c);
+
+ /* src3/4/6_ctl */
+ /* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
+ cx25840_write4(client, 0x900, 0x08014faa);
+ cx25840_write4(client, 0x904, 0x08014faa);
+ cx25840_write4(client, 0x90c, 0x08014faa);
+ break;
+ }
+ }
+
+ state->audclk_freq = freq;
+
+ return 0;
+}
+
+static int set_audclk_freq(struct i2c_client *client, u32 freq)
+{
+ struct cx25840_state *state = to_state(i2c_get_clientdata(client));
+
+ if (freq != 32000 && freq != 44100 && freq != 48000)
+ return -EINVAL;
+
+ if (is_cx231xx(state))
+ return cx231xx_set_audclk_freq(client, freq);
+
+ if (is_cx2388x(state))
+ return cx23885_set_audclk_freq(client, freq);
+
+ if (is_cx2583x(state))
+ return cx25836_set_audclk_freq(client, freq);
+
+ return cx25840_set_audclk_freq(client, freq);
+}
+
+void cx25840_audio_set_path(struct i2c_client *client)
+{
+ struct cx25840_state *state = to_state(i2c_get_clientdata(client));
+
+ if (!is_cx2583x(state)) {
+ /* assert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x01);
+
+ /* 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, 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 */
+ cx25840_write4(client, 0x8d0, 0x1f063870);
+ }
+ }
+
+ set_audclk_freq(client, state->audclk_freq);
+
+ if (!is_cx2583x(state)) {
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ /* When the microcontroller detects the
+ * audio format, it will unmute the lines */
+ cx25840_and_or(client, 0x803, ~0x10, 0x10);
+ }
+
+ /* deassert soft reset */
+ cx25840_and_or(client, 0x810, ~0x1, 0x00);
+
+ /* Ensure the controller is running when we exit */
+ if (is_cx2388x(state) || is_cx231xx(state))
+ cx25840_and_or(client, 0x803, ~0x10, 0x10);
+ }
+}
+
+static void set_volume(struct i2c_client *client, int volume)
+{
+ int vol;
+
+ /* Convert the volume to msp3400 values (0-127) */
+ 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 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);
+ }
+}
+
+int cx25840_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct cx25840_state *state = to_state(sd);
+ int retval;
+
+ if (!is_cx2583x(state))
+ cx25840_and_or(client, 0x810, ~0x1, 1);
+ if (state->aud_input != CX25840_AUDIO_SERIAL) {
+ cx25840_and_or(client, 0x803, ~0x10, 0);
+ cx25840_write(client, 0x8d3, 0x1f);
+ }
+ retval = set_audclk_freq(client, freq);
+ if (state->aud_input != CX25840_AUDIO_SERIAL)
+ cx25840_and_or(client, 0x803, ~0x10, 0x10);
+ if (!is_cx2583x(state))
+ cx25840_and_or(client, 0x810, ~0x1, 0);
+ return retval;
+}
+
+static int cx25840_audio_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = to_sd(ctrl);
+ struct cx25840_state *state = to_state(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ if (state->mute->val)
+ set_volume(client, 0);
+ else
+ set_volume(client, state->volume->val);
+ break;
+ case V4L2_CID_AUDIO_BASS:
+ /* PATH1_EQ_BASS_VOL */
+ cx25840_and_or(client, 0x8d9, ~0x3f,
+ 48 - (ctrl->val * 48 / 0xffff));
+ break;
+ case V4L2_CID_AUDIO_TREBLE:
+ /* PATH1_EQ_TREBLE_VOL */
+ cx25840_and_or(client, 0x8db, ~0x3f,
+ 48 - (ctrl->val * 48 / 0xffff));
+ break;
+ case V4L2_CID_AUDIO_BALANCE:
+ set_balance(client, ctrl->val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+const struct v4l2_ctrl_ops cx25840_audio_ctrl_ops = {
+ .s_ctrl = cx25840_audio_s_ctrl,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 07:42:21 +0000