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_input_clock(struct echoaudio *chip, u16 clock);
33static int set_professional_spdif(struct echoaudio *chip, char prof);
34static int update_flags(struct echoaudio *chip);
35static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
36			   int gain);
37static int update_vmixer_level(struct echoaudio *chip);
38
39
40static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
41{
42	int err;
43
44	if (snd_BUG_ON((subdevice_id & 0xfff0) != MIA))
45		return -ENODEV;
46
47	if ((err = init_dsp_comm_page(chip))) {
48		dev_err(chip->card->dev,
49			"init_hw - could not initialize DSP comm page\n");
50		return err;
51	}
52
53	chip->device_id = device_id;
54	chip->subdevice_id = subdevice_id;
55	chip->bad_board = true;
56	chip->dsp_code_to_load = FW_MIA_DSP;
57	/* Since this card has no ASIC, mark it as loaded so everything
58	   works OK */
59	chip->asic_loaded = true;
60	if ((subdevice_id & 0x0000f) == MIA_MIDI_REV)
61		chip->has_midi = true;
62	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
63		ECHO_CLOCK_BIT_SPDIF;
64
65	if ((err = load_firmware(chip)) < 0)
66		return err;
67	chip->bad_board = false;
68
69	return err;
70}
71
72
73
74static int set_mixer_defaults(struct echoaudio *chip)
75{
76	return init_line_levels(chip);
77}
78
79
80
81static u32 detect_input_clocks(const struct echoaudio *chip)
82{
83	u32 clocks_from_dsp, clock_bits;
84
85	/* Map the DSP clock detect bits to the generic driver clock
86	   detect bits */
87	clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
88
89	clock_bits = ECHO_CLOCK_BIT_INTERNAL;
90
91	if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SPDIF)
92		clock_bits |= ECHO_CLOCK_BIT_SPDIF;
93
94	return clock_bits;
95}
96
97
98
99/* The Mia has no ASIC. Just do nothing */
100static int load_asic(struct echoaudio *chip)
101{
102	return 0;
103}
104
105
106
107static int set_sample_rate(struct echoaudio *chip, u32 rate)
108{
109	u32 control_reg;
110
111	switch (rate) {
112	case 96000:
113		control_reg = MIA_96000;
114		break;
115	case 88200:
116		control_reg = MIA_88200;
117		break;
118	case 48000:
119		control_reg = MIA_48000;
120		break;
121	case 44100:
122		control_reg = MIA_44100;
123		break;
124	case 32000:
125		control_reg = MIA_32000;
126		break;
127	default:
128		dev_err(chip->card->dev,
129			"set_sample_rate: %d invalid!\n", rate);
130		return -EINVAL;
131	}
132
133	/* Override the clock setting if this Mia is set to S/PDIF clock */
134	if (chip->input_clock == ECHO_CLOCK_SPDIF)
135		control_reg |= MIA_SPDIF;
136
137	/* Set the control register if it has changed */
138	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
139		if (wait_handshake(chip))
140			return -EIO;
141
142		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
143		chip->comm_page->control_register = cpu_to_le32(control_reg);
144		chip->sample_rate = rate;
145
146		clear_handshake(chip);
147		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
148	}
149	return 0;
150}
151
152
153
154static int set_input_clock(struct echoaudio *chip, u16 clock)
155{
156	dev_dbg(chip->card->dev, "set_input_clock(%d)\n", clock);
157	if (snd_BUG_ON(clock != ECHO_CLOCK_INTERNAL &&
158		       clock != ECHO_CLOCK_SPDIF))
159		return -EINVAL;
160
161	chip->input_clock = clock;
162	return set_sample_rate(chip, chip->sample_rate);
163}
164
165
166
167/* This function routes the sound from a virtual channel to a real output */
168static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
169			   int gain)
170{
171	int index;
172
173	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
174		       output >= num_busses_out(chip)))
175		return -EINVAL;
176
177	if (wait_handshake(chip))
178		return -EIO;
179
180	chip->vmixer_gain[output][pipe] = gain;
181	index = output * num_pipes_out(chip) + pipe;
182	chip->comm_page->vmixer[index] = gain;
183
184	dev_dbg(chip->card->dev,
185		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
186	return 0;
187}
188
189
190
191/* Tell the DSP to read and update virtual mixer levels in comm page. */
192static int update_vmixer_level(struct echoaudio *chip)
193{
194	if (wait_handshake(chip))
195		return -EIO;
196	clear_handshake(chip);
197	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
198}
199
200
201
202/* Tell the DSP to reread the flags from the comm page */
203static int update_flags(struct echoaudio *chip)
204{
205	if (wait_handshake(chip))
206		return -EIO;
207	clear_handshake(chip);
208	return send_vector(chip, DSP_VC_UPDATE_FLAGS);
209}
210
211
212
213static int set_professional_spdif(struct echoaudio *chip, char prof)
214{
215	dev_dbg(chip->card->dev, "set_professional_spdif %d\n", prof);
216	if (prof)
217		chip->comm_page->flags |=
218			cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
219	else
220		chip->comm_page->flags &=
221			~cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
222	chip->professional_spdif = prof;
223	return update_flags(chip);
224}
225
226