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 | err = init_dsp_comm_page(chip); |
40 | if (err) { |
41 | dev_err(chip->card->dev, |
42 | "init_hw: could not initialize DSP comm page\n" ); |
43 | return err; |
44 | } |
45 | |
46 | chip->device_id = device_id; |
47 | chip->subdevice_id = subdevice_id; |
48 | chip->bad_board = true; |
49 | chip->dsp_code_to_load = FW_DARLA20_DSP; |
50 | chip->spdif_status = GD_SPDIF_STATUS_UNDEF; |
51 | chip->clock_state = GD_CLOCK_UNDEF; |
52 | /* Since this card has no ASIC, mark it as loaded so everything |
53 | works OK */ |
54 | chip->asic_loaded = true; |
55 | chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL; |
56 | |
57 | err = load_firmware(chip); |
58 | if (err < 0) |
59 | return err; |
60 | chip->bad_board = false; |
61 | |
62 | return err; |
63 | } |
64 | |
65 | |
66 | |
67 | static int set_mixer_defaults(struct echoaudio *chip) |
68 | { |
69 | return init_line_levels(chip); |
70 | } |
71 | |
72 | |
73 | |
74 | /* The Darla20 has no external clock sources */ |
75 | static u32 detect_input_clocks(const struct echoaudio *chip) |
76 | { |
77 | return ECHO_CLOCK_BIT_INTERNAL; |
78 | } |
79 | |
80 | |
81 | |
82 | /* The Darla20 has no ASIC. Just do nothing */ |
83 | static int load_asic(struct echoaudio *chip) |
84 | { |
85 | return 0; |
86 | } |
87 | |
88 | |
89 | |
90 | static int set_sample_rate(struct echoaudio *chip, u32 rate) |
91 | { |
92 | u8 clock_state, spdif_status; |
93 | |
94 | if (wait_handshake(chip)) |
95 | return -EIO; |
96 | |
97 | switch (rate) { |
98 | case 44100: |
99 | clock_state = GD_CLOCK_44; |
100 | spdif_status = GD_SPDIF_STATUS_44; |
101 | break; |
102 | case 48000: |
103 | clock_state = GD_CLOCK_48; |
104 | spdif_status = GD_SPDIF_STATUS_48; |
105 | break; |
106 | default: |
107 | clock_state = GD_CLOCK_NOCHANGE; |
108 | spdif_status = GD_SPDIF_STATUS_NOCHANGE; |
109 | break; |
110 | } |
111 | |
112 | if (chip->clock_state == clock_state) |
113 | clock_state = GD_CLOCK_NOCHANGE; |
114 | if (spdif_status == chip->spdif_status) |
115 | spdif_status = GD_SPDIF_STATUS_NOCHANGE; |
116 | |
117 | chip->comm_page->sample_rate = cpu_to_le32(rate); |
118 | chip->comm_page->gd_clock_state = clock_state; |
119 | chip->comm_page->gd_spdif_status = spdif_status; |
120 | chip->comm_page->gd_resampler_state = 3; /* magic number - should always be 3 */ |
121 | |
122 | /* Save the new audio state if it changed */ |
123 | if (clock_state != GD_CLOCK_NOCHANGE) |
124 | chip->clock_state = clock_state; |
125 | if (spdif_status != GD_SPDIF_STATUS_NOCHANGE) |
126 | chip->spdif_status = spdif_status; |
127 | chip->sample_rate = rate; |
128 | |
129 | clear_handshake(chip); |
130 | return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE); |
131 | } |
132 | |