int cx18_av_s_clock_freq(struct v4l2_subdev *sd, u32 freq) { struct cx18 *cx = v4l2_get_subdevdata(sd); struct cx18_av_state *state = &cx->av_state; int retval; u8 v; if (state->aud_input > CX18_AV_AUDIO_SERIAL2) { v = cx18_av_read(cx, 0x803) & ~0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); cx18_av_write(cx, 0x8d3, 0x1f); } v = cx18_av_read(cx, 0x810) | 0x1; cx18_av_write_expect(cx, 0x810, v, v, 0x0f); retval = set_audclk_freq(cx, freq); v = cx18_av_read(cx, 0x810) & ~0x1; cx18_av_write_expect(cx, 0x810, v, v, 0x0f); if (state->aud_input > CX18_AV_AUDIO_SERIAL2) { v = cx18_av_read(cx, 0x803) | 0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); } return retval; }
static int get_balance(struct cx18 *cx) { /* balance is 7 bit, 0 to -96dB */ /* check PATH1_BAL_LEVEL */ int balance = cx18_av_read(cx, 0x8d5) & 0x7f; /* check PATH1_BAL_LEFT */ if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0) balance = 0x80 - balance; else balance = 0x80 + balance; return balance << 8; }
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); } }
static int get_treble(struct cx18 *cx) { /* treble is 49 steps +12dB to -12dB */ /* check PATH1_EQ_TREBLE_VOL */ int treble = cx18_av_read(cx, 0x8db) & 0x3f; treble = (((48 - treble) * 0xffff) + 47) / 48; return treble; }
static int get_bass(struct cx18 *cx) { /* bass is 49 steps +12dB to -12dB */ /* check PATH1_EQ_BASS_VOL */ int bass = cx18_av_read(cx, 0x8d9) & 0x3f; bass = (((48 - bass) * 0xffff) + 47) / 48; return bass; }
static int get_volume(struct cx18 *cx) { /* Volume runs +18dB to -96dB in 1/2dB steps * change to fit the msp3400 -114dB to +12dB range */ /* check PATH1_VOLUME */ int vol = 228 - cx18_av_read(cx, 0x8d4); vol = (vol / 2) + 23; return vol << 9; }
void cx18_av_audio_set_path(struct cx18 *cx) { struct cx18_av_state *state = &cx->av_state; u8 v; /* stop microcontroller */ v = cx18_av_read(cx, 0x803) & ~0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); /* assert soft reset */ v = cx18_av_read(cx, 0x810) | 0x01; cx18_av_write_expect(cx, 0x810, v, v, 0x0f); /* 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 */ v = cx18_av_read(cx, 0x810) & ~0x01; cx18_av_write_expect(cx, 0x810, v, v, 0x0f); if (state->aud_input > CX18_AV_AUDIO_SERIAL2) { /* When the microcontroller detects the * audio format, it will unmute the lines */ v = cx18_av_read(cx, 0x803) | 0x10; cx18_av_write_expect(cx, 0x803, v, v, 0x1f); } }
static int get_mute(struct cx18 *cx) { /* check SRC1_MUTE_EN */ return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0; }