// **************************************************************************** // // Copyright Echo Digital Audio Corporation (c) 1998 - 2004 // All rights reserved // www.echoaudio.com // // This file is part of Echo Digital Audio's generic driver library. // // Echo Digital Audio's generic driver library is free software; // you can redistribute it and/or modify it under the terms of // the GNU General Public License as published by the Free Software Foundation. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, // MA 02111-1307, USA. // // **************************************************************************** // // Translation from C++ and adaptation for use in ALSA-Driver // were made by Giuliano Pochini <pochini@shiny.it> // // **************************************************************************** static int init_hw(echoaudio_t *chip, u16 device_id, u16 subdevice_id) { int err; DE_INIT(("init_hw() - Darla20\n")); snd_assert((subdevice_id & 0xfff0) == DARLA20, return -ENODEV); /* This part is common to all the cards */ if ((err = init_dsp_comm_page(chip))) { DE_INIT(("init_hw - could not initialize DSP comm page\n")); return err; } chip->device_id = device_id; chip->subdevice_id = subdevice_id; chip->bad_board = TRUE; chip->dsp_code_to_load = &card_fw[FW_DARLA20_DSP]; chip->spdif_status = GD_SPDIF_STATUS_UNDEF; chip->clock_state = GD_CLOCK_UNDEF; /* Since this card has no ASIC, mark it as loaded so everything works OK */ chip->asic_loaded = TRUE; chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL; /* Load the DSP and the ASIC on the PCI card */ if ((err = load_firmware(chip)) < 0) return err; chip->bad_board = FALSE; /* Must call this here after DSP is init to init gains and mutes */ if ((err = init_line_levels(chip)) < 0) return err; DE_INIT(("init_hw done\n")); return err; } /* The Darla20 has no external clock sources */ static u32 detect_input_clocks(const echoaudio_t *chip) { return ECHO_CLOCK_BIT_INTERNAL; } /* The Darla20 has no ASIC. Just do nothing */ static int load_asic(echoaudio_t *chip) { return 0; } //=========================================================================== // // set_sample_rate // // Set the audio sample rate for Gina20/Darla20 // // For Gina and Darla, three parameters need to be set: the resampler state, // the clock state, and the S/PDIF output status state. The idea is that // these parameters are changed as infrequently as possible. // // Resampling is no longer supported. // //=========================================================================== static int set_sample_rate(echoaudio_t *chip, u32 rate) { u8 clock_state, spdif_status; if (wait_handshake(chip)) return -EIO; /* @@ Darla20 has no S/PDIF, can I remove spdif_status ? */ switch (rate) { case 44100: clock_state = GD_CLOCK_44; spdif_status = GD_SPDIF_STATUS_44; break; case 48000: clock_state = GD_CLOCK_48; spdif_status = GD_SPDIF_STATUS_48; break; default: clock_state = GD_CLOCK_NOCHANGE; spdif_status = GD_SPDIF_STATUS_NOCHANGE; break; } if (chip->clock_state == clock_state) clock_state = GD_CLOCK_NOCHANGE; if (spdif_status == chip->spdif_status) spdif_status = GD_SPDIF_STATUS_NOCHANGE; /* Write the audio state to the comm page */ chip->comm_page->sample_rate = cpu_to_le32(rate); chip->comm_page->gd_clock_state = clock_state; chip->comm_page->gd_spdif_status = spdif_status; chip->comm_page->gd_resampler_state = 3; /* magic number - should always be 3 */ /* Save the new audio state if it changed */ if (clock_state != GD_CLOCK_NOCHANGE) chip->clock_state = clock_state; if (spdif_status != GD_SPDIF_STATUS_NOCHANGE) chip->spdif_status = spdif_status; chip->sample_rate = rate; /* Send command to DSP */ clear_handshake(chip); return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE); }