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
32static 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
67static 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 */
75static 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 */
83static int load_asic(struct echoaudio *chip)
84{
85	return 0;
86}
87
88
89
90static 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