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 32 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id) 33 { 34 int err; 35 36 if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20)) 37 return -ENODEV; 38 39 if ((err = init_dsp_comm_page(chip))) { 40 dev_err(chip->card->dev, 41 "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 return err; 61 } 62 63 64 65 static int set_mixer_defaults(struct echoaudio *chip) 66 { 67 return init_line_levels(chip); 68 } 69 70 71 72 /* The Darla20 has no external clock sources */ 73 static u32 detect_input_clocks(const struct echoaudio *chip) 74 { 75 return ECHO_CLOCK_BIT_INTERNAL; 76 } 77 78 79 80 /* The Darla20 has no ASIC. Just do nothing */ 81 static int load_asic(struct echoaudio *chip) 82 { 83 return 0; 84 } 85 86 87 88 static int set_sample_rate(struct echoaudio *chip, u32 rate) 89 { 90 u8 clock_state, spdif_status; 91 92 if (wait_handshake(chip)) 93 return -EIO; 94 95 switch (rate) { 96 case 44100: 97 clock_state = GD_CLOCK_44; 98 spdif_status = GD_SPDIF_STATUS_44; 99 break; 100 case 48000: 101 clock_state = GD_CLOCK_48; 102 spdif_status = GD_SPDIF_STATUS_48; 103 break; 104 default: 105 clock_state = GD_CLOCK_NOCHANGE; 106 spdif_status = GD_SPDIF_STATUS_NOCHANGE; 107 break; 108 } 109 110 if (chip->clock_state == clock_state) 111 clock_state = GD_CLOCK_NOCHANGE; 112 if (spdif_status == chip->spdif_status) 113 spdif_status = GD_SPDIF_STATUS_NOCHANGE; 114 115 chip->comm_page->sample_rate = cpu_to_le32(rate); 116 chip->comm_page->gd_clock_state = clock_state; 117 chip->comm_page->gd_spdif_status = spdif_status; 118 chip->comm_page->gd_resampler_state = 3; /* magic number - should always be 3 */ 119 120 /* Save the new audio state if it changed */ 121 if (clock_state != GD_CLOCK_NOCHANGE) 122 chip->clock_state = clock_state; 123 if (spdif_status != GD_SPDIF_STATUS_NOCHANGE) 124 chip->spdif_status = spdif_status; 125 chip->sample_rate = rate; 126 127 clear_handshake(chip); 128 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE); 129 } 130