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 read_dsp(struct echoaudio *chip, u32 *data);
33static int set_professional_spdif(struct echoaudio *chip, char prof);
34static int load_asic_generic(struct echoaudio *chip, u32 cmd, short asic);
35static int check_asic_status(struct echoaudio *chip);
36static int update_flags(struct echoaudio *chip);
37
38
39static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
40{
41	int err;
42
43	if (snd_BUG_ON((subdevice_id & 0xfff0) != LAYLA20))
44		return -ENODEV;
45
46	err = init_dsp_comm_page(chip);
47	if (err) {
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->has_midi = true;
57	chip->dsp_code_to_load = FW_LAYLA20_DSP;
58	chip->input_clock_types =
59		ECHO_CLOCK_BIT_INTERNAL | ECHO_CLOCK_BIT_SPDIF |
60		ECHO_CLOCK_BIT_WORD | ECHO_CLOCK_BIT_SUPER;
61	chip->output_clock_types =
62		ECHO_CLOCK_BIT_WORD | ECHO_CLOCK_BIT_SUPER;
63
64	err = load_firmware(chip);
65	if (err < 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	chip->professional_spdif = false;
77	return init_line_levels(chip);
78}
79
80
81
82static u32 detect_input_clocks(const struct echoaudio *chip)
83{
84	u32 clocks_from_dsp, clock_bits;
85
86	/* Map the DSP clock detect bits to the generic driver clock 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	if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_WORD) {
95		if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SUPER)
96			clock_bits |= ECHO_CLOCK_BIT_SUPER;
97		else
98			clock_bits |= ECHO_CLOCK_BIT_WORD;
99	}
100
101	return clock_bits;
102}
103
104
105
106/* ASIC status check - some cards have one or two ASICs that need to be
107loaded.  Once that load is complete, this function is called to see if
108the load was successful.
109If this load fails, it does not necessarily mean that the hardware is
110defective - the external box may be disconnected or turned off.
111This routine sometimes fails for Layla20; for Layla20, the loop runs
1125 times and succeeds if it wins on three of the loops. */
113static int check_asic_status(struct echoaudio *chip)
114{
115	u32 asic_status;
116	int goodcnt, i;
117
118	chip->asic_loaded = false;
119	for (i = goodcnt = 0; i < 5; i++) {
120		send_vector(chip, DSP_VC_TEST_ASIC);
121
122		/* The DSP will return a value to indicate whether or not
123		   the ASIC is currently loaded */
124		if (read_dsp(chip, &asic_status) < 0) {
125			dev_err(chip->card->dev,
126				"check_asic_status: failed on read_dsp\n");
127			return -EIO;
128		}
129
130		if (asic_status == ASIC_ALREADY_LOADED) {
131			if (++goodcnt == 3) {
132				chip->asic_loaded = true;
133				return 0;
134			}
135		}
136	}
137	return -EIO;
138}
139
140
141
142/* Layla20 has an ASIC in the external box */
143static int load_asic(struct echoaudio *chip)
144{
145	int err;
146
147	if (chip->asic_loaded)
148		return 0;
149
150	err = load_asic_generic(chip, DSP_FNC_LOAD_LAYLA_ASIC,
151				FW_LAYLA20_ASIC);
152	if (err < 0)
153		return err;
154
155	/* Check if ASIC is alive and well. */
156	return check_asic_status(chip);
157}
158
159
160
161static int set_sample_rate(struct echoaudio *chip, u32 rate)
162{
163	if (snd_BUG_ON(rate < 8000 || rate > 50000))
164		return -EINVAL;
165
166	/* Only set the clock for internal mode. Do not return failure,
167	   simply treat it as a non-event. */
168	if (chip->input_clock != ECHO_CLOCK_INTERNAL) {
169		dev_warn(chip->card->dev,
170			 "Cannot set sample rate - clock not set to CLK_CLOCKININTERNAL\n");
171		chip->comm_page->sample_rate = cpu_to_le32(rate);
172		chip->sample_rate = rate;
173		return 0;
174	}
175
176	if (wait_handshake(chip))
177		return -EIO;
178
179	dev_dbg(chip->card->dev, "set_sample_rate(%d)\n", rate);
180	chip->sample_rate = rate;
181	chip->comm_page->sample_rate = cpu_to_le32(rate);
182	clear_handshake(chip);
183	return send_vector(chip, DSP_VC_SET_LAYLA_SAMPLE_RATE);
184}
185
186
187
188static int set_input_clock(struct echoaudio *chip, u16 clock_source)
189{
190	u16 clock;
191	u32 rate;
192
193	rate = 0;
194	switch (clock_source) {
195	case ECHO_CLOCK_INTERNAL:
196		rate = chip->sample_rate;
197		clock = LAYLA20_CLOCK_INTERNAL;
198		break;
199	case ECHO_CLOCK_SPDIF:
200		clock = LAYLA20_CLOCK_SPDIF;
201		break;
202	case ECHO_CLOCK_WORD:
203		clock = LAYLA20_CLOCK_WORD;
204		break;
205	case ECHO_CLOCK_SUPER:
206		clock = LAYLA20_CLOCK_SUPER;
207		break;
208	default:
209		dev_err(chip->card->dev,
210			"Input clock 0x%x not supported for Layla24\n",
211			clock_source);
212		return -EINVAL;
213	}
214	chip->input_clock = clock_source;
215
216	chip->comm_page->input_clock = cpu_to_le16(clock);
217	clear_handshake(chip);
218	send_vector(chip, DSP_VC_UPDATE_CLOCKS);
219
220	if (rate)
221		set_sample_rate(chip, rate);
222
223	return 0;
224}
225
226
227
228static int set_output_clock(struct echoaudio *chip, u16 clock)
229{
230	switch (clock) {
231	case ECHO_CLOCK_SUPER:
232		clock = LAYLA20_OUTPUT_CLOCK_SUPER;
233		break;
234	case ECHO_CLOCK_WORD:
235		clock = LAYLA20_OUTPUT_CLOCK_WORD;
236		break;
237	default:
238		dev_err(chip->card->dev, "set_output_clock wrong clock\n");
239		return -EINVAL;
240	}
241
242	if (wait_handshake(chip))
243		return -EIO;
244
245	chip->comm_page->output_clock = cpu_to_le16(clock);
246	chip->output_clock = clock;
247	clear_handshake(chip);
248	return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
249}
250
251
252
253/* Set input bus gain (one unit is 0.5dB !) */
254static int set_input_gain(struct echoaudio *chip, u16 input, int gain)
255{
256	if (snd_BUG_ON(input >= num_busses_in(chip)))
257		return -EINVAL;
258
259	if (wait_handshake(chip))
260		return -EIO;
261
262	chip->input_gain[input] = gain;
263	gain += GL20_INPUT_GAIN_MAGIC_NUMBER;
264	chip->comm_page->line_in_level[input] = gain;
265	return 0;
266}
267
268
269
270/* Tell the DSP to reread the flags from the comm page */
271static int update_flags(struct echoaudio *chip)
272{
273	if (wait_handshake(chip))
274		return -EIO;
275	clear_handshake(chip);
276	return send_vector(chip, DSP_VC_UPDATE_FLAGS);
277}
278
279
280
281static int set_professional_spdif(struct echoaudio *chip, char prof)
282{
283	if (prof)
284		chip->comm_page->flags |=
285			cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
286	else
287		chip->comm_page->flags &=
288			~cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
289	chip->professional_spdif = prof;
290	return update_flags(chip);
291}
292