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) != DARLA24))
37		return -ENODEV;
38
39	if ((err = init_dsp_comm_page(chip))) {
40		dev_err(chip->card->dev,
41			"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 = FW_DARLA24_DSP;
49	/* Since this card has no ASIC, mark it as loaded so everything
50	   works OK */
51	chip->asic_loaded = TRUE;
52	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
53		ECHO_CLOCK_BIT_ESYNC;
54
55	if ((err = load_firmware(chip)) < 0)
56		return err;
57	chip->bad_board = FALSE;
58
59	return err;
60}
61
62
63
64static int set_mixer_defaults(struct echoaudio *chip)
65{
66	return init_line_levels(chip);
67}
68
69
70
71static u32 detect_input_clocks(const struct echoaudio *chip)
72{
73	u32 clocks_from_dsp, clock_bits;
74
75	/* Map the DSP clock detect bits to the generic driver clock
76	   detect bits */
77	clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
78
79	clock_bits = ECHO_CLOCK_BIT_INTERNAL;
80
81	if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
82		clock_bits |= ECHO_CLOCK_BIT_ESYNC;
83
84	return clock_bits;
85}
86
87
88
89/* The Darla24 has no ASIC. Just do nothing */
90static int load_asic(struct echoaudio *chip)
91{
92	return 0;
93}
94
95
96
97static int set_sample_rate(struct echoaudio *chip, u32 rate)
98{
99	u8 clock;
100
101	switch (rate) {
102	case 96000:
103		clock = GD24_96000;
104		break;
105	case 88200:
106		clock = GD24_88200;
107		break;
108	case 48000:
109		clock = GD24_48000;
110		break;
111	case 44100:
112		clock = GD24_44100;
113		break;
114	case 32000:
115		clock = GD24_32000;
116		break;
117	case 22050:
118		clock = GD24_22050;
119		break;
120	case 16000:
121		clock = GD24_16000;
122		break;
123	case 11025:
124		clock = GD24_11025;
125		break;
126	case 8000:
127		clock = GD24_8000;
128		break;
129	default:
130		dev_err(chip->card->dev,
131			"set_sample_rate: Error, invalid sample rate %d\n",
132			rate);
133		return -EINVAL;
134	}
135
136	if (wait_handshake(chip))
137		return -EIO;
138
139	dev_dbg(chip->card->dev,
140		"set_sample_rate: %d clock %d\n", rate, clock);
141	chip->sample_rate = rate;
142
143	/* Override the sample rate if this card is set to Echo sync. */
144	if (chip->input_clock == ECHO_CLOCK_ESYNC)
145		clock = GD24_EXT_SYNC;
146
147	chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP ? */
148	chip->comm_page->gd_clock_state = clock;
149	clear_handshake(chip);
150	return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
151}
152
153
154
155static int set_input_clock(struct echoaudio *chip, u16 clock)
156{
157	if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
158		       clock != ECHO_CLOCK_ESYNC))
159		return -EINVAL;
160	chip->input_clock = clock;
161	return set_sample_rate(chip, chip->sample_rate);
162}
163
164