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 init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id) 33{ 34 int err; 35 36 DE_INIT(("init_hw() - Darla20\n")); 37 if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20)) 38 return -ENODEV; 39 40 if ((err = init_dsp_comm_page(chip))) { 41 DE_INIT(("init_hw - could not initialize DSP comm page\n")); 42 return err; 43 } 44 45 chip->device_id = device_id; 46 chip->subdevice_id = subdevice_id; 47 chip->bad_board = TRUE; 48 chip->dsp_code_to_load = FW_DARLA20_DSP; 49 chip->spdif_status = GD_SPDIF_STATUS_UNDEF; 50 chip->clock_state = GD_CLOCK_UNDEF; 51 /* Since this card has no ASIC, mark it as loaded so everything 52 works OK */ 53 chip->asic_loaded = TRUE; 54 chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL; 55 56 if ((err = load_firmware(chip)) < 0) 57 return err; 58 chip->bad_board = FALSE; 59 60 DE_INIT(("init_hw done\n")); 61 return err; 62} 63 64 65 66static int set_mixer_defaults(struct echoaudio *chip) 67{ 68 return init_line_levels(chip); 69} 70 71 72 73/* The Darla20 has no external clock sources */ 74static u32 detect_input_clocks(const struct echoaudio *chip) 75{ 76 return ECHO_CLOCK_BIT_INTERNAL; 77} 78 79 80 81/* The Darla20 has no ASIC. Just do nothing */ 82static int load_asic(struct echoaudio *chip) 83{ 84 return 0; 85} 86 87 88 89static int set_sample_rate(struct echoaudio *chip, u32 rate) 90{ 91 u8 clock_state, spdif_status; 92 93 if (wait_handshake(chip)) 94 return -EIO; 95 96 switch (rate) { 97 case 44100: 98 clock_state = GD_CLOCK_44; 99 spdif_status = GD_SPDIF_STATUS_44; 100 break; 101 case 48000: 102 clock_state = GD_CLOCK_48; 103 spdif_status = GD_SPDIF_STATUS_48; 104 break; 105 default: 106 clock_state = GD_CLOCK_NOCHANGE; 107 spdif_status = GD_SPDIF_STATUS_NOCHANGE; 108 break; 109 } 110 111 if (chip->clock_state == clock_state) 112 clock_state = GD_CLOCK_NOCHANGE; 113 if (spdif_status == chip->spdif_status) 114 spdif_status = GD_SPDIF_STATUS_NOCHANGE; 115 116 chip->comm_page->sample_rate = cpu_to_le32(rate); 117 chip->comm_page->gd_clock_state = clock_state; 118 chip->comm_page->gd_spdif_status = spdif_status; 119 chip->comm_page->gd_resampler_state = 3; /* magic number - should always be 3 */ 120 121 /* Save the new audio state if it changed */ 122 if (clock_state != GD_CLOCK_NOCHANGE) 123 chip->clock_state = clock_state; 124 if (spdif_status != GD_SPDIF_STATUS_NOCHANGE) 125 chip->spdif_status = spdif_status; 126 chip->sample_rate = rate; 127 128 clear_handshake(chip); 129 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE); 130} 131