349 lines
8.7 KiB
C
349 lines
8.7 KiB
C
/* cx25840 audio functions
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <linux/videodev2.h>
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#include <linux/i2c.h>
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#include <media/v4l2-common.h>
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#include "cx25840.h"
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static int set_audclk_freq(struct i2c_client *client, u32 freq)
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{
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struct cx25840_state *state = i2c_get_clientdata(client);
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if (freq != 32000 && freq != 44100 && freq != 48000)
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return -EINVAL;
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/* assert soft reset */
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cx25840_and_or(client, 0x810, ~0x1, 0x01);
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/* common for all inputs and rates */
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/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
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cx25840_write(client, 0x127, 0x50);
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if (state->aud_input != CX25840_AUDIO_SERIAL) {
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switch (freq) {
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case 32000:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f040610);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0xee39bb01);
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/* src3/4/6_ctl = 0x0801f77f */
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cx25840_write4(client, 0x900, 0x7ff70108);
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cx25840_write4(client, 0x904, 0x7ff70108);
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cx25840_write4(client, 0x90c, 0x7ff70108);
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break;
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case 44100:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f040910);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0xd66bec00);
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/* src3/4/6_ctl = 0x08016d59 */
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cx25840_write4(client, 0x900, 0x596d0108);
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cx25840_write4(client, 0x904, 0x596d0108);
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cx25840_write4(client, 0x90c, 0x596d0108);
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break;
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case 48000:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f040a10);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0xe5d69800);
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/* src3/4/6_ctl = 0x08014faa */
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cx25840_write4(client, 0x900, 0xaa4f0108);
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cx25840_write4(client, 0x904, 0xaa4f0108);
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cx25840_write4(client, 0x90c, 0xaa4f0108);
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break;
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}
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} else {
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switch (freq) {
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case 32000:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f04081e);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0x69082a01);
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/* src1_ctl = 0x08010000 */
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cx25840_write4(client, 0x8f8, 0x00000108);
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/* src3/4/6_ctl = 0x08020000 */
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cx25840_write4(client, 0x900, 0x00000208);
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cx25840_write4(client, 0x904, 0x00000208);
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cx25840_write4(client, 0x90c, 0x00000208);
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/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
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cx25840_write(client, 0x127, 0x54);
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break;
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case 44100:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f040918);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0xd66bec00);
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/* src1_ctl = 0x08010000 */
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cx25840_write4(client, 0x8f8, 0xcd600108);
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/* src3/4/6_ctl = 0x08020000 */
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cx25840_write4(client, 0x900, 0x85730108);
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cx25840_write4(client, 0x904, 0x85730108);
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cx25840_write4(client, 0x90c, 0x85730108);
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break;
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case 48000:
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/* VID_PLL and AUX_PLL */
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cx25840_write4(client, 0x108, 0x0f040a18);
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/* AUX_PLL_FRAC */
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cx25840_write4(client, 0x110, 0xe5d69800);
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/* src1_ctl = 0x08010000 */
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cx25840_write4(client, 0x8f8, 0x00800108);
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/* src3/4/6_ctl = 0x08020000 */
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cx25840_write4(client, 0x900, 0x55550108);
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cx25840_write4(client, 0x904, 0x55550108);
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cx25840_write4(client, 0x90c, 0x55550108);
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break;
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}
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}
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/* deassert soft reset */
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cx25840_and_or(client, 0x810, ~0x1, 0x00);
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state->audclk_freq = freq;
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return 0;
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}
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void cx25840_audio_set_path(struct i2c_client *client)
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{
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struct cx25840_state *state = i2c_get_clientdata(client);
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/* stop microcontroller */
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cx25840_and_or(client, 0x803, ~0x10, 0);
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/* Mute everything to prevent the PFFT! */
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cx25840_write(client, 0x8d3, 0x1f);
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if (state->aud_input == CX25840_AUDIO_SERIAL) {
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/* Set Path1 to Serial Audio Input */
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cx25840_write4(client, 0x8d0, 0x12100101);
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/* The microcontroller should not be started for the
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* non-tuner inputs: autodetection is specific for
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* TV audio. */
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} else {
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/* Set Path1 to Analog Demod Main Channel */
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cx25840_write4(client, 0x8d0, 0x7038061f);
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/* When the microcontroller detects the
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* audio format, it will unmute the lines */
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cx25840_and_or(client, 0x803, ~0x10, 0x10);
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}
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set_audclk_freq(client, state->audclk_freq);
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}
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static int get_volume(struct i2c_client *client)
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{
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/* Volume runs +18dB to -96dB in 1/2dB steps
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* change to fit the msp3400 -114dB to +12dB range */
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/* check PATH1_VOLUME */
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int vol = 228 - cx25840_read(client, 0x8d4);
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vol = (vol / 2) + 23;
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return vol << 9;
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}
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static void set_volume(struct i2c_client *client, int volume)
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{
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/* First convert the volume to msp3400 values (0-127) */
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int vol = volume >> 9;
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/* now scale it up to cx25840 values
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* -114dB to -96dB maps to 0
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* this should be 19, but in my testing that was 4dB too loud */
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if (vol <= 23) {
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vol = 0;
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} else {
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vol -= 23;
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}
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/* PATH1_VOLUME */
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cx25840_write(client, 0x8d4, 228 - (vol * 2));
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}
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static int get_bass(struct i2c_client *client)
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{
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/* bass is 49 steps +12dB to -12dB */
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/* check PATH1_EQ_BASS_VOL */
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int bass = cx25840_read(client, 0x8d9) & 0x3f;
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bass = (((48 - bass) * 0xffff) + 47) / 48;
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return bass;
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}
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static void set_bass(struct i2c_client *client, int bass)
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{
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/* PATH1_EQ_BASS_VOL */
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cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
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}
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static int get_treble(struct i2c_client *client)
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{
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/* treble is 49 steps +12dB to -12dB */
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/* check PATH1_EQ_TREBLE_VOL */
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int treble = cx25840_read(client, 0x8db) & 0x3f;
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treble = (((48 - treble) * 0xffff) + 47) / 48;
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return treble;
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}
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static void set_treble(struct i2c_client *client, int treble)
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{
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/* PATH1_EQ_TREBLE_VOL */
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cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
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}
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static int get_balance(struct i2c_client *client)
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{
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/* balance is 7 bit, 0 to -96dB */
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/* check PATH1_BAL_LEVEL */
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int balance = cx25840_read(client, 0x8d5) & 0x7f;
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/* check PATH1_BAL_LEFT */
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if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
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balance = 0x80 - balance;
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else
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balance = 0x80 + balance;
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return balance << 8;
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}
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static void set_balance(struct i2c_client *client, int balance)
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{
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int bal = balance >> 8;
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if (bal > 0x80) {
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/* PATH1_BAL_LEFT */
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cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
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/* PATH1_BAL_LEVEL */
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cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
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} else {
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/* PATH1_BAL_LEFT */
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cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
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/* PATH1_BAL_LEVEL */
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cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
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}
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}
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static int get_mute(struct i2c_client *client)
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{
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/* check SRC1_MUTE_EN */
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return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
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}
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static void set_mute(struct i2c_client *client, int mute)
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{
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struct cx25840_state *state = i2c_get_clientdata(client);
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if (state->aud_input != CX25840_AUDIO_SERIAL) {
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/* Must turn off microcontroller in order to mute sound.
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* Not sure if this is the best method, but it does work.
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* If the microcontroller is running, then it will undo any
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* changes to the mute register. */
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if (mute) {
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/* disable microcontroller */
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cx25840_and_or(client, 0x803, ~0x10, 0x00);
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cx25840_write(client, 0x8d3, 0x1f);
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} else {
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/* enable microcontroller */
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cx25840_and_or(client, 0x803, ~0x10, 0x10);
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}
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} else {
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/* SRC1_MUTE_EN */
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cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
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}
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}
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int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
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{
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struct v4l2_control *ctrl = arg;
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switch (cmd) {
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case VIDIOC_INT_AUDIO_CLOCK_FREQ:
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return set_audclk_freq(client, *(u32 *)arg);
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case VIDIOC_G_CTRL:
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value = get_volume(client);
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break;
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case V4L2_CID_AUDIO_BASS:
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ctrl->value = get_bass(client);
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break;
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case V4L2_CID_AUDIO_TREBLE:
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ctrl->value = get_treble(client);
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break;
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case V4L2_CID_AUDIO_BALANCE:
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ctrl->value = get_balance(client);
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break;
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = get_mute(client);
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break;
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default:
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return -EINVAL;
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}
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break;
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case VIDIOC_S_CTRL:
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME:
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set_volume(client, ctrl->value);
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break;
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case V4L2_CID_AUDIO_BASS:
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set_bass(client, ctrl->value);
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break;
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case V4L2_CID_AUDIO_TREBLE:
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set_treble(client, ctrl->value);
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break;
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case V4L2_CID_AUDIO_BALANCE:
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set_balance(client, ctrl->value);
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break;
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case V4L2_CID_AUDIO_MUTE:
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set_mute(client, ctrl->value);
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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