1 /***************************************************************************
3 Copyright Echo Digital Audio Corporation (c) 1998 - 2004
7 This file is part of Echo Digital Audio's generic driver library.
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
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.
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,
24 *************************************************************************
26 Translation from C++ and adaptation for use in ALSA-Driver
27 were made by Giuliano Pochini <pochini@shiny.it>
29 ****************************************************************************/
32 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
36 DE_INIT(("init_hw() - Darla24\n"));
37 snd_assert((subdevice_id & 0xfff0) == DARLA24, return -ENODEV);
39 if ((err = init_dsp_comm_page(chip))) {
40 DE_INIT(("init_hw - could not initialize DSP comm page\n"));
44 chip->device_id = device_id;
45 chip->subdevice_id = subdevice_id;
46 chip->bad_board = TRUE;
47 chip->dsp_code_to_load = &card_fw[FW_DARLA24_DSP];
48 /* Since this card has no ASIC, mark it as loaded so everything
50 chip->asic_loaded = TRUE;
51 chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
54 if ((err = load_firmware(chip)) < 0)
56 chip->bad_board = FALSE;
58 if ((err = init_line_levels(chip)) < 0)
61 DE_INIT(("init_hw done\n"));
67 static u32 detect_input_clocks(const struct echoaudio *chip)
69 u32 clocks_from_dsp, clock_bits;
71 /* Map the DSP clock detect bits to the generic driver clock
73 clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
75 clock_bits = ECHO_CLOCK_BIT_INTERNAL;
77 if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
78 clock_bits |= ECHO_CLOCK_BIT_ESYNC;
85 /* The Darla24 has no ASIC. Just do nothing */
86 static int load_asic(struct echoaudio *chip)
93 static int set_sample_rate(struct echoaudio *chip, u32 rate)
126 DE_ACT(("set_sample_rate: Error, invalid sample rate %d\n",
131 if (wait_handshake(chip))
134 DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
135 chip->sample_rate = rate;
137 /* Override the sample rate if this card is set to Echo sync. */
138 if (chip->input_clock == ECHO_CLOCK_ESYNC)
139 clock = GD24_EXT_SYNC;
141 chip->comm_page->sample_rate = cpu_to_le32(rate); /* ignored by the DSP ? */
142 chip->comm_page->gd_clock_state = clock;
143 clear_handshake(chip);
144 return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
149 static int set_input_clock(struct echoaudio *chip, u16 clock)
151 snd_assert(clock == ECHO_CLOCK_INTERNAL ||
152 clock == ECHO_CLOCK_ESYNC, return -EINVAL);
153 chip->input_clock = clock;
154 return set_sample_rate(chip, chip->sample_rate);