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