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_express_dsp.c (3287B)

      1/************************************************************************
      2
      3This file is part of Echo Digital Audio's generic driver library.
      4Copyright Echo Digital Audio Corporation (c) 1998 - 2005
      5All rights reserved
      6www.echoaudio.com
      7
      8This library is free software; you can redistribute it and/or
      9modify it under the terms of the GNU Lesser General Public
     10License as published by the Free Software Foundation; either
     11version 2.1 of the License, or (at your option) any later version.
     12
     13This library is distributed in the hope that it will be useful,
     14but WITHOUT ANY WARRANTY; without even the implied warranty of
     15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16Lesser General Public License for more details.
     17
     18You should have received a copy of the GNU Lesser General Public
     19License along with this library; if not, write to the Free Software
     20Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
     21
     22*************************************************************************
     23
     24 Translation from C++ and adaptation for use in ALSA-Driver
     25 were made by Giuliano Pochini <pochini@shiny.it>
     26
     27*************************************************************************/
     28
     29static int set_sample_rate(struct echoaudio *chip, u32 rate)
     30{
     31	u32 clock, control_reg, old_control_reg;
     32
     33	if (wait_handshake(chip))
     34		return -EIO;
     35
     36	old_control_reg = le32_to_cpu(chip->comm_page->control_register);
     37	control_reg = old_control_reg & ~INDIGO_EXPRESS_CLOCK_MASK;
     38
     39	switch (rate) {
     40	case 32000:
     41		clock = INDIGO_EXPRESS_32000;
     42		break;
     43	case 44100:
     44		clock = INDIGO_EXPRESS_44100;
     45		break;
     46	case 48000:
     47		clock = INDIGO_EXPRESS_48000;
     48		break;
     49	case 64000:
     50		clock = INDIGO_EXPRESS_32000|INDIGO_EXPRESS_DOUBLE_SPEED;
     51		break;
     52	case 88200:
     53		clock = INDIGO_EXPRESS_44100|INDIGO_EXPRESS_DOUBLE_SPEED;
     54		break;
     55	case 96000:
     56		clock = INDIGO_EXPRESS_48000|INDIGO_EXPRESS_DOUBLE_SPEED;
     57		break;
     58	default:
     59		return -EINVAL;
     60	}
     61
     62	control_reg |= clock;
     63	if (control_reg != old_control_reg) {
     64		dev_dbg(chip->card->dev,
     65			"set_sample_rate: %d clock %d\n", rate, clock);
     66		chip->comm_page->control_register = cpu_to_le32(control_reg);
     67		chip->sample_rate = rate;
     68		clear_handshake(chip);
     69		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
     70	}
     71	return 0;
     72}
     73
     74
     75
     76/* This function routes the sound from a virtual channel to a real output */
     77static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
     78			   int gain)
     79{
     80	int index;
     81
     82	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
     83		       output >= num_busses_out(chip)))
     84		return -EINVAL;
     85
     86	if (wait_handshake(chip))
     87		return -EIO;
     88
     89	chip->vmixer_gain[output][pipe] = gain;
     90	index = output * num_pipes_out(chip) + pipe;
     91	chip->comm_page->vmixer[index] = gain;
     92
     93	dev_dbg(chip->card->dev,
     94		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
     95	return 0;
     96}
     97
     98
     99
    100/* Tell the DSP to read and update virtual mixer levels in comm page. */
    101static int update_vmixer_level(struct echoaudio *chip)
    102{
    103	if (wait_handshake(chip))
    104		return -EIO;
    105	clear_handshake(chip);
    106	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
    107}
    108
    109
    110
    111static u32 detect_input_clocks(const struct echoaudio *chip)
    112{
    113	return ECHO_CLOCK_BIT_INTERNAL;
    114}
    115
    116
    117
    118/* The IndigoIO has no ASIC. Just do nothing */
    119static int load_asic(struct echoaudio *chip)
    120{
    121	return 0;
    122}