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 set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
33			   int gain);
34static int update_vmixer_level(struct echoaudio *chip);
35
36
37static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
38{
39	int err;
40
41	if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO))
42		return -ENODEV;
43
44	if ((err = init_dsp_comm_page(chip))) {
45		dev_err(chip->card->dev,
46			"init_hw - could not initialize DSP comm page\n");
47		return err;
48	}
49
50	chip->device_id = device_id;
51	chip->subdevice_id = subdevice_id;
52	chip->bad_board = TRUE;
53	chip->dsp_code_to_load = FW_INDIGO_DSP;
54	/* Since this card has no ASIC, mark it as loaded so everything
55	   works OK */
56	chip->asic_loaded = TRUE;
57	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
58
59	if ((err = load_firmware(chip)) < 0)
60		return err;
61	chip->bad_board = FALSE;
62
63	return err;
64}
65
66
67
68static int set_mixer_defaults(struct echoaudio *chip)
69{
70	return init_line_levels(chip);
71}
72
73
74
75static u32 detect_input_clocks(const struct echoaudio *chip)
76{
77	return ECHO_CLOCK_BIT_INTERNAL;
78}
79
80
81
82/* The Indigo 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	u32 control_reg;
93
94	switch (rate) {
95	case 96000:
96		control_reg = MIA_96000;
97		break;
98	case 88200:
99		control_reg = MIA_88200;
100		break;
101	case 48000:
102		control_reg = MIA_48000;
103		break;
104	case 44100:
105		control_reg = MIA_44100;
106		break;
107	case 32000:
108		control_reg = MIA_32000;
109		break;
110	default:
111		dev_err(chip->card->dev,
112			"set_sample_rate: %d invalid!\n", rate);
113		return -EINVAL;
114	}
115
116	/* Set the control register if it has changed */
117	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
118		if (wait_handshake(chip))
119			return -EIO;
120
121		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
122		chip->comm_page->control_register = cpu_to_le32(control_reg);
123		chip->sample_rate = rate;
124
125		clear_handshake(chip);
126		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
127	}
128	return 0;
129}
130
131
132
133/* This function routes the sound from a virtual channel to a real output */
134static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
135			   int gain)
136{
137	int index;
138
139	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
140		       output >= num_busses_out(chip)))
141		return -EINVAL;
142
143	if (wait_handshake(chip))
144		return -EIO;
145
146	chip->vmixer_gain[output][pipe] = gain;
147	index = output * num_pipes_out(chip) + pipe;
148	chip->comm_page->vmixer[index] = gain;
149
150	dev_dbg(chip->card->dev,
151		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
152	return 0;
153}
154
155
156
157/* Tell the DSP to read and update virtual mixer levels in comm page. */
158static int update_vmixer_level(struct echoaudio *chip)
159{
160	if (wait_handshake(chip))
161		return -EIO;
162	clear_handshake(chip);
163	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
164}
165
166