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 DE_INIT(("init_hw() - Darla24\n")); 37 if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA24)) 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_DARLA24_DSP; 49 /* Since this card has no ASIC, mark it as loaded so everything 50 works OK */ 51 chip->asic_loaded = TRUE; 52 chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL | 53 ECHO_CLOCK_BIT_ESYNC; 54 55 if ((err = load_firmware(chip)) < 0) 56 return err; 57 chip->bad_board = FALSE; 58 59 DE_INIT(("init_hw done\n")); 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 static u32 detect_input_clocks(const struct echoaudio *chip) 73 { 74 u32 clocks_from_dsp, clock_bits; 75 76 /* Map the DSP clock detect bits to the generic driver clock 77 detect bits */ 78 clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks); 79 80 clock_bits = ECHO_CLOCK_BIT_INTERNAL; 81 82 if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC) 83 clock_bits |= ECHO_CLOCK_BIT_ESYNC; 84 85 return clock_bits; 86 } 87 88 89 90 /* The Darla24 has no ASIC. Just do nothing */ 91 static int load_asic(struct echoaudio *chip) 92 { 93 return 0; 94 } 95 96 97 98 static int set_sample_rate(struct echoaudio *chip, u32 rate) 99 { 100 u8 clock; 101 102 switch (rate) { 103 case 96000: 104 clock = GD24_96000; 105 break; 106 case 88200: 107 clock = GD24_88200; 108 break; 109 case 48000: 110 clock = GD24_48000; 111 break; 112 case 44100: 113 clock = GD24_44100; 114 break; 115 case 32000: 116 clock = GD24_32000; 117 break; 118 case 22050: 119 clock = GD24_22050; 120 break; 121 case 16000: 122 clock = GD24_16000; 123 break; 124 case 11025: 125 clock = GD24_11025; 126 break; 127 case 8000: 128 clock = GD24_8000; 129 break; 130 default: 131 DE_ACT(("set_sample_rate: Error, invalid sample rate %d\n", 132 rate)); 133 return -EINVAL; 134 } 135 136 if (wait_handshake(chip)) 137 return -EIO; 138 139 DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock)); 140 chip->sample_rate = rate; 141 142 /* Override the sample rate if this card is set to Echo sync. */ 143 if (chip->input_clock == ECHO_CLOCK_ESYNC) 144 clock = GD24_EXT_SYNC; 145 146 chip->comm_page->sample_rate = cpu_to_le32(rate); /* ignored by the DSP ? */ 147 chip->comm_page->gd_clock_state = clock; 148 clear_handshake(chip); 149 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE); 150 } 151 152 153 154 static int set_input_clock(struct echoaudio *chip, u16 clock) 155 { 156 if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL && 157 clock != ECHO_CLOCK_ESYNC)) 158 return -EINVAL; 159 chip->input_clock = clock; 160 return set_sample_rate(chip, chip->sample_rate); 161 } 162 163