cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

indigo_dsp.c (4040B)

      1/****************************************************************************
      2
      3   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
      4   All rights reserved
      5   www.echoaudio.com
      6
      7   This file is part of Echo Digital Audio's generic driver library.
      8
      9   Echo Digital Audio's generic driver library is free software;
     10   you can redistribute it and/or modify it under the terms of
     11   the GNU General Public License as published by the Free Software
     12   Foundation.
     13
     14   This program is distributed in the hope that it will be useful,
     15   but WITHOUT ANY WARRANTY; without even the implied warranty of
     16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17   GNU General Public License for more details.
     18
     19   You should have received a copy of the GNU General Public License
     20   along with this program; if not, write to the Free Software
     21   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
     22   MA  02111-1307, USA.
     23
     24   *************************************************************************
     25
     26 Translation from C++ and adaptation for use in ALSA-Driver
     27 were made by Giuliano Pochini <pochini@shiny.it>
     28
     29****************************************************************************/
     30
     31
     32static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
     33			   int gain);
     34static int update_vmixer_level(struct echoaudio *chip);
     35
     36
     37static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
     38{
     39	int err;
     40
     41	if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO))
     42		return -ENODEV;
     43
     44	err = init_dsp_comm_page(chip);
     45	if (err) {
     46		dev_err(chip->card->dev,
     47			"init_hw - could not initialize DSP comm page\n");
     48		return err;
     49	}
     50
     51	chip->device_id = device_id;
     52	chip->subdevice_id = subdevice_id;
     53	chip->bad_board = true;
     54	chip->dsp_code_to_load = FW_INDIGO_DSP;
     55	/* Since this card has no ASIC, mark it as loaded so everything
     56	   works OK */
     57	chip->asic_loaded = true;
     58	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
     59
     60	err = load_firmware(chip);
     61	if (err < 0)
     62		return err;
     63	chip->bad_board = false;
     64
     65	return err;
     66}
     67
     68
     69
     70static int set_mixer_defaults(struct echoaudio *chip)
     71{
     72	return init_line_levels(chip);
     73}
     74
     75
     76
     77static u32 detect_input_clocks(const struct echoaudio *chip)
     78{
     79	return ECHO_CLOCK_BIT_INTERNAL;
     80}
     81
     82
     83
     84/* The Indigo has no ASIC. Just do nothing */
     85static int load_asic(struct echoaudio *chip)
     86{
     87	return 0;
     88}
     89
     90
     91
     92static int set_sample_rate(struct echoaudio *chip, u32 rate)
     93{
     94	u32 control_reg;
     95
     96	switch (rate) {
     97	case 96000:
     98		control_reg = MIA_96000;
     99		break;
    100	case 88200:
    101		control_reg = MIA_88200;
    102		break;
    103	case 48000:
    104		control_reg = MIA_48000;
    105		break;
    106	case 44100:
    107		control_reg = MIA_44100;
    108		break;
    109	case 32000:
    110		control_reg = MIA_32000;
    111		break;
    112	default:
    113		dev_err(chip->card->dev,
    114			"set_sample_rate: %d invalid!\n", rate);
    115		return -EINVAL;
    116	}
    117
    118	/* Set the control register if it has changed */
    119	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
    120		if (wait_handshake(chip))
    121			return -EIO;
    122
    123		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
    124		chip->comm_page->control_register = cpu_to_le32(control_reg);
    125		chip->sample_rate = rate;
    126
    127		clear_handshake(chip);
    128		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
    129	}
    130	return 0;
    131}
    132
    133
    134
    135/* This function routes the sound from a virtual channel to a real output */
    136static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
    137			   int gain)
    138{
    139	int index;
    140
    141	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
    142		       output >= num_busses_out(chip)))
    143		return -EINVAL;
    144
    145	if (wait_handshake(chip))
    146		return -EIO;
    147
    148	chip->vmixer_gain[output][pipe] = gain;
    149	index = output * num_pipes_out(chip) + pipe;
    150	chip->comm_page->vmixer[index] = gain;
    151
    152	dev_dbg(chip->card->dev,
    153		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
    154	return 0;
    155}
    156
    157
    158
    159/* Tell the DSP to read and update virtual mixer levels in comm page. */
    160static int update_vmixer_level(struct echoaudio *chip)
    161{
    162	if (wait_handshake(chip))
    163		return -EIO;
    164	clear_handshake(chip);
    165	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
    166}
    167