diff options
Diffstat (limited to 'drivers/media/video/cx25840/cx25840-audio.c')
-rw-r--r-- | drivers/media/video/cx25840/cx25840-audio.c | 437 |
1 files changed, 437 insertions, 0 deletions
diff --git a/drivers/media/video/cx25840/cx25840-audio.c b/drivers/media/video/cx25840/cx25840-audio.c new file mode 100644 index 0000000..d6421e1 --- /dev/null +++ b/drivers/media/video/cx25840/cx25840-audio.c @@ -0,0 +1,437 @@ +/* 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; + + /* common for all inputs and rates */ + /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */ + if (!state->is_cx23885) + cx25840_write(client, 0x127, 0x50); + + if (state->aud_input != CX25840_AUDIO_SERIAL) { + switch (freq) { + case 32000: + if (state->is_cx23885) { + /* We don't have register values + * so avoid destroying registers. */ + break; + } + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x1006040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x01bb39ee); + + if (state->is_cx25836) + break; + + /* src3/4/6_ctl = 0x0801f77f */ + cx25840_write4(client, 0x900, 0x0801f77f); + cx25840_write4(client, 0x904, 0x0801f77f); + cx25840_write4(client, 0x90c, 0x0801f77f); + break; + + case 44100: + if (state->is_cx23885) { + /* We don't have register values + * so avoid destroying registers. */ + break; + } + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x1009040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x00ec6bd6); + + if (state->is_cx25836) + break; + + /* src3/4/6_ctl = 0x08016d59 */ + cx25840_write4(client, 0x900, 0x08016d59); + cx25840_write4(client, 0x904, 0x08016d59); + cx25840_write4(client, 0x90c, 0x08016d59); + break; + + case 48000: + if (state->is_cx23885) { + /* We don't have register values + * so avoid destroying registers. */ + break; + } + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x100a040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x0098d6e5); + + if (state->is_cx25836) + break; + + /* src3/4/6_ctl = 0x08014faa */ + cx25840_write4(client, 0x900, 0x08014faa); + cx25840_write4(client, 0x904, 0x08014faa); + cx25840_write4(client, 0x90c, 0x08014faa); + break; + } + } else { + switch (freq) { + case 32000: + if (state->is_cx23885) { + /* We don't have register values + * so avoid destroying registers. */ + break; + } + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x1e08040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x012a0869); + + if (state->is_cx25836) + break; + + /* src1_ctl = 0x08010000 */ + cx25840_write4(client, 0x8f8, 0x08010000); + + /* src3/4/6_ctl = 0x08020000 */ + cx25840_write4(client, 0x900, 0x08020000); + cx25840_write4(client, 0x904, 0x08020000); + cx25840_write4(client, 0x90c, 0x08020000); + + /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */ + cx25840_write(client, 0x127, 0x54); + break; + + case 44100: + if (state->is_cx23885) { + /* We don't have register values + * so avoid destroying registers. */ + break; + } + + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x1809040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x00ec6bd6); + + if (state->is_cx25836) + break; + + /* src1_ctl = 0x08010000 */ + cx25840_write4(client, 0x8f8, 0x080160cd); + + /* src3/4/6_ctl = 0x08020000 */ + cx25840_write4(client, 0x900, 0x08017385); + cx25840_write4(client, 0x904, 0x08017385); + cx25840_write4(client, 0x90c, 0x08017385); + break; + + case 48000: + if (!state->is_cx23885) { + /* VID_PLL and AUX_PLL */ + cx25840_write4(client, 0x108, 0x180a040f); + + /* AUX_PLL_FRAC */ + cx25840_write4(client, 0x110, 0x0098d6e5); + } + + if (state->is_cx25836) + break; + + if (!state->is_cx23885) { + /* src1_ctl */ + cx25840_write4(client, 0x8f8, 0x08018000); + + /* src3/4/6_ctl */ + cx25840_write4(client, 0x900, 0x08015555); + cx25840_write4(client, 0x904, 0x08015555); + cx25840_write4(client, 0x90c, 0x08015555); + } else { + + cx25840_write4(client, 0x8f8, 0x0801867c); + + cx25840_write4(client, 0x900, 0x08014faa); + cx25840_write4(client, 0x904, 0x08014faa); + cx25840_write4(client, 0x90c, 0x08014faa); + } + break; + } + } + + state->audclk_freq = freq; + + return 0; +} + +void cx25840_audio_set_path(struct i2c_client *client) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + + /* 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 (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); + + if (state->is_cx23885) { + /* Ensure the controller is running when we exit */ + cx25840_and_or(client, 0x803, ~0x10, 0x10); + } +} + +static int get_volume(struct i2c_client *client) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + int vol; + + if (state->unmute_volume >= 0) + return state->unmute_volume; + + /* Volume runs +18dB to -96dB in 1/2dB steps + * change to fit the msp3400 -114dB to +12dB range */ + + /* check PATH1_VOLUME */ + vol = 228 - cx25840_read(client, 0x8d4); + vol = (vol / 2) + 23; + return vol << 9; +} + +static void set_volume(struct i2c_client *client, int volume) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + int vol; + + if (state->unmute_volume >= 0) { + state->unmute_volume = volume; + return; + } + + /* 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 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) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + + return state->unmute_volume >= 0; +} + +static void set_mute(struct i2c_client *client, int mute) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + + if (mute && state->unmute_volume == -1) { + int vol = get_volume(client); + + set_volume(client, 0); + state->unmute_volume = vol; + } + else if (!mute && state->unmute_volume != -1) { + int vol = state->unmute_volume; + + state->unmute_volume = -1; + set_volume(client, vol); + } +} + +int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg) +{ + struct cx25840_state *state = i2c_get_clientdata(client); + struct v4l2_control *ctrl = arg; + int retval; + + switch (cmd) { + case VIDIOC_INT_AUDIO_CLOCK_FREQ: + if (!state->is_cx25836) + 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, *(u32 *)arg); + if (state->aud_input != CX25840_AUDIO_SERIAL) { + cx25840_and_or(client, 0x803, ~0x10, 0x10); + } + if (!state->is_cx25836) + cx25840_and_or(client, 0x810, ~0x1, 0); + return retval; + + 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; +} |