202 строки
5.9 KiB
C
202 строки
5.9 KiB
C
/****************************************************************************
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Copyright Echo Digital Audio Corporation (c) 1998 - 2004
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All rights reserved
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www.echoaudio.com
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This file is part of Echo Digital Audio's generic driver library.
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Echo Digital Audio's generic driver library is free software;
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you can redistribute it and/or modify it under the terms of
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the GNU General Public License as published by the Free Software
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Foundation.
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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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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., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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*************************************************************************
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Translation from C++ and adaptation for use in ALSA-Driver
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were made by Giuliano Pochini <pochini@shiny.it>
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****************************************************************************/
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/* These functions are common for Gina24, Layla24 and Mona cards */
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/* ASIC status check - some cards have one or two ASICs that need to be
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loaded. Once that load is complete, this function is called to see if
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the load was successful.
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If this load fails, it does not necessarily mean that the hardware is
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defective - the external box may be disconnected or turned off. */
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static int check_asic_status(struct echoaudio *chip)
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{
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u32 asic_status;
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send_vector(chip, DSP_VC_TEST_ASIC);
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/* The DSP will return a value to indicate whether or not the
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ASIC is currently loaded */
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if (read_dsp(chip, &asic_status) < 0) {
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dev_err(chip->card->dev,
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"check_asic_status: failed on read_dsp\n");
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chip->asic_loaded = false;
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return -EIO;
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}
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chip->asic_loaded = (asic_status == ASIC_ALREADY_LOADED);
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return chip->asic_loaded ? 0 : -EIO;
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}
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/* Most configuration of Gina24, Layla24, or Mona is accomplished by writing
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the control register. write_control_reg sends the new control register
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value to the DSP. */
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static int write_control_reg(struct echoaudio *chip, u32 value, char force)
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{
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/* Handle the digital input auto-mute */
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if (chip->digital_in_automute)
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value |= GML_DIGITAL_IN_AUTO_MUTE;
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else
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value &= ~GML_DIGITAL_IN_AUTO_MUTE;
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dev_dbg(chip->card->dev, "write_control_reg: 0x%x\n", value);
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/* Write the control register */
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value = cpu_to_le32(value);
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if (value != chip->comm_page->control_register || force) {
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if (wait_handshake(chip))
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return -EIO;
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chip->comm_page->control_register = value;
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clear_handshake(chip);
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return send_vector(chip, DSP_VC_WRITE_CONTROL_REG);
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}
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return 0;
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}
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/* Gina24, Layla24, and Mona support digital input auto-mute. If the digital
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input auto-mute is enabled, the DSP will only enable the digital inputs if
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the card is syncing to a valid clock on the ADAT or S/PDIF inputs.
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If the auto-mute is disabled, the digital inputs are enabled regardless of
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what the input clock is set or what is connected. */
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static int set_input_auto_mute(struct echoaudio *chip, int automute)
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{
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dev_dbg(chip->card->dev, "set_input_auto_mute %d\n", automute);
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chip->digital_in_automute = automute;
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/* Re-set the input clock to the current value - indirectly causes
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the auto-mute flag to be sent to the DSP */
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return set_input_clock(chip, chip->input_clock);
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}
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/* S/PDIF coax / S/PDIF optical / ADAT - switch */
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static int set_digital_mode(struct echoaudio *chip, u8 mode)
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{
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u8 previous_mode;
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int err, i, o;
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if (chip->bad_board)
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return -EIO;
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/* All audio channels must be closed before changing the digital mode */
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if (snd_BUG_ON(chip->pipe_alloc_mask))
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return -EAGAIN;
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if (snd_BUG_ON(!(chip->digital_modes & (1 << mode))))
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return -EINVAL;
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previous_mode = chip->digital_mode;
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err = dsp_set_digital_mode(chip, mode);
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/* If we successfully changed the digital mode from or to ADAT,
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then make sure all output, input and monitor levels are
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updated by the DSP comm object. */
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if (err >= 0 && previous_mode != mode &&
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(previous_mode == DIGITAL_MODE_ADAT || mode == DIGITAL_MODE_ADAT)) {
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spin_lock_irq(&chip->lock);
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for (o = 0; o < num_busses_out(chip); o++)
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for (i = 0; i < num_busses_in(chip); i++)
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set_monitor_gain(chip, o, i,
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chip->monitor_gain[o][i]);
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#ifdef ECHOCARD_HAS_INPUT_GAIN
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for (i = 0; i < num_busses_in(chip); i++)
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set_input_gain(chip, i, chip->input_gain[i]);
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update_input_line_level(chip);
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#endif
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for (o = 0; o < num_busses_out(chip); o++)
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set_output_gain(chip, o, chip->output_gain[o]);
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update_output_line_level(chip);
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spin_unlock_irq(&chip->lock);
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}
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return err;
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}
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/* Set the S/PDIF output format */
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static int set_professional_spdif(struct echoaudio *chip, char prof)
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{
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u32 control_reg;
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int err;
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/* Clear the current S/PDIF flags */
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control_reg = le32_to_cpu(chip->comm_page->control_register);
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control_reg &= GML_SPDIF_FORMAT_CLEAR_MASK;
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/* Set the new S/PDIF flags depending on the mode */
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control_reg |= GML_SPDIF_TWO_CHANNEL | GML_SPDIF_24_BIT |
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GML_SPDIF_COPY_PERMIT;
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if (prof) {
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/* Professional mode */
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control_reg |= GML_SPDIF_PRO_MODE;
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switch (chip->sample_rate) {
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case 32000:
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control_reg |= GML_SPDIF_SAMPLE_RATE0 |
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GML_SPDIF_SAMPLE_RATE1;
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break;
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case 44100:
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control_reg |= GML_SPDIF_SAMPLE_RATE0;
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break;
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case 48000:
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control_reg |= GML_SPDIF_SAMPLE_RATE1;
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break;
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}
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} else {
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/* Consumer mode */
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switch (chip->sample_rate) {
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case 32000:
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control_reg |= GML_SPDIF_SAMPLE_RATE0 |
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GML_SPDIF_SAMPLE_RATE1;
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break;
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case 48000:
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control_reg |= GML_SPDIF_SAMPLE_RATE1;
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break;
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}
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}
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if ((err = write_control_reg(chip, control_reg, false)))
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return err;
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chip->professional_spdif = prof;
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dev_dbg(chip->card->dev, "set_professional_spdif to %s\n",
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prof ? "Professional" : "Consumer");
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return 0;
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}
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