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 void set_mute(struct cx18 *cx, int mute) { struct cx18_av_state *state = &cx->av_state; u8 v; if (state->aud_input > CX18_AV_AUDIO_SERIAL2) { /* 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. */ v = cx18_av_read(cx, 0x803); if (mute) { /* disable microcontroller */ v &= ~0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); cx18_av_write(cx, 0x8d3, 0x1f); } else { /* enable microcontroller */ v |= 0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); } } else { /* SRC1_MUTE_EN */ cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00); } }
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_SERIAL2) { /* 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_SERIAL2) { /* When the microcontroller detects the * audio format, it will unmute the lines */ cx18_av_and_or(cx, 0x803, ~0x10, 0x10); } }
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 void set_bass(struct cx18 *cx, int bass) { /* PATH1_EQ_BASS_VOL */ cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff)); }
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_SERIAL2) { 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_SERIAL2) 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; }