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dd7b254d GP |
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")); | |
da3cec35 TI |
37 | if (snd_BUG_ON((subdevice_id & 0xfff0) != DARLA20)) |
38 | return -ENODEV; | |
dd7b254d GP |
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 | } |