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	DE_INIT(("init_hw() - Darla24\n"));
37	snd_assert((subdevice_id & 0xfff0) == DARLA24, return -ENODEV);
38
39	if ((err = init_dsp_comm_page(chip))) {
40		DE_INIT(("init_hw - could not initialize DSP comm page\n"));
41		return err;
42	}
43
44	chip->device_id = device_id;
45	chip->subdevice_id = subdevice_id;
46	chip->bad_board = TRUE;
47	chip->dsp_code_to_load = &card_fw[FW_DARLA24_DSP];
48	/* Since this card has no ASIC, mark it as loaded so everything
49	   works OK */
50	chip->asic_loaded = TRUE;
51	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
52		ECHO_CLOCK_BIT_ESYNC;
53
54	if ((err = load_firmware(chip)) < 0)
55		return err;
56	chip->bad_board = FALSE;
57
58	if ((err = init_line_levels(chip)) < 0)
59		return err;
60
61	DE_INIT(("init_hw done\n"));
62	return err;
63}
64
65
66
67static u32 detect_input_clocks(const struct echoaudio *chip)
68{
69	u32 clocks_from_dsp, clock_bits;
70
71	/* Map the DSP clock detect bits to the generic driver clock
72	   detect bits */
73	clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
74
75	clock_bits = ECHO_CLOCK_BIT_INTERNAL;
76
77	if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_ESYNC)
78		clock_bits |= ECHO_CLOCK_BIT_ESYNC;
79
80	return clock_bits;
81}
82
83
84
85/* The Darla24 has no ASIC. Just do nothing */
86static int load_asic(struct echoaudio *chip)
87{
88	return 0;
89}
90
91
92
93static int set_sample_rate(struct echoaudio *chip, u32 rate)
94{
95	u8 clock;
96
97	switch (rate) {
98	case 96000:
99		clock = GD24_96000;
100		break;
101	case 88200:
102		clock = GD24_88200;
103		break;
104	case 48000:
105		clock = GD24_48000;
106		break;
107	case 44100:
108		clock = GD24_44100;
109		break;
110	case 32000:
111		clock = GD24_32000;
112		break;
113	case 22050:
114		clock = GD24_22050;
115		break;
116	case 16000:
117		clock = GD24_16000;
118		break;
119	case 11025:
120		clock = GD24_11025;
121		break;
122	case 8000:
123		clock = GD24_8000;
124		break;
125	default:
126		DE_ACT(("set_sample_rate: Error, invalid sample rate %d\n",
127			rate));
128		return -EINVAL;
129	}
130
131	if (wait_handshake(chip))
132		return -EIO;
133
134	DE_ACT(("set_sample_rate: %d clock %d\n", rate, clock));
135	chip->sample_rate = rate;
136
137	/* Override the sample rate if this card is set to Echo sync. */
138	if (chip->input_clock == ECHO_CLOCK_ESYNC)
139		clock = GD24_EXT_SYNC;
140
141	chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP ? */
142	chip->comm_page->gd_clock_state = clock;
143	clear_handshake(chip);
144	return send_vector(chip, DSP_VC_SET_GD_AUDIO_STATE);
145}
146
147
148
149static int set_input_clock(struct echoaudio *chip, u16 clock)
150{
151	snd_assert(clock == ECHO_CLOCK_INTERNAL ||
152		   clock == ECHO_CLOCK_ESYNC, return -EINVAL);
153	chip->input_clock = clock;
154	return set_sample_rate(chip, chip->sample_rate);
155}
156