xref: /openbmc/linux/sound/pci/echoaudio/mia_dsp.c (revision 22246614)
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 
32 static int set_input_clock(struct echoaudio *chip, u16 clock);
33 static int set_professional_spdif(struct echoaudio *chip, char prof);
34 static int update_flags(struct echoaudio *chip);
35 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
36 			   int gain);
37 static int update_vmixer_level(struct echoaudio *chip);
38 
39 
40 static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
41 {
42 	int err;
43 
44 	DE_INIT(("init_hw() - Mia\n"));
45 	snd_assert((subdevice_id & 0xfff0) == MIA, return -ENODEV);
46 
47 	if ((err = init_dsp_comm_page(chip))) {
48 		DE_INIT(("init_hw - could not initialize DSP comm page\n"));
49 		return err;
50 	}
51 
52 	chip->device_id = device_id;
53 	chip->subdevice_id = subdevice_id;
54 	chip->bad_board = TRUE;
55 	chip->dsp_code_to_load = &card_fw[FW_MIA_DSP];
56 	/* Since this card has no ASIC, mark it as loaded so everything
57 	   works OK */
58 	chip->asic_loaded = TRUE;
59 	if ((subdevice_id & 0x0000f) == MIA_MIDI_REV)
60 		chip->has_midi = TRUE;
61 	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL |
62 		ECHO_CLOCK_BIT_SPDIF;
63 
64 	if ((err = load_firmware(chip)) < 0)
65 		return err;
66 	chip->bad_board = FALSE;
67 
68 	if ((err = init_line_levels(chip)))
69 		return err;
70 
71 	/* Default routing of the virtual channels: vchannels 0-3 go to analog
72 	outputs and vchannels 4-7 go to S/PDIF outputs */
73 	set_vmixer_gain(chip, 0, 0, 0);
74 	set_vmixer_gain(chip, 1, 1, 0);
75 	set_vmixer_gain(chip, 0, 2, 0);
76 	set_vmixer_gain(chip, 1, 3, 0);
77 	set_vmixer_gain(chip, 2, 4, 0);
78 	set_vmixer_gain(chip, 3, 5, 0);
79 	set_vmixer_gain(chip, 2, 6, 0);
80 	set_vmixer_gain(chip, 3, 7, 0);
81 	err = update_vmixer_level(chip);
82 
83 	DE_INIT(("init_hw done\n"));
84 	return err;
85 }
86 
87 
88 
89 static u32 detect_input_clocks(const struct echoaudio *chip)
90 {
91 	u32 clocks_from_dsp, clock_bits;
92 
93 	/* Map the DSP clock detect bits to the generic driver clock
94 	   detect bits */
95 	clocks_from_dsp = le32_to_cpu(chip->comm_page->status_clocks);
96 
97 	clock_bits = ECHO_CLOCK_BIT_INTERNAL;
98 
99 	if (clocks_from_dsp & GLDM_CLOCK_DETECT_BIT_SPDIF)
100 		clock_bits |= ECHO_CLOCK_BIT_SPDIF;
101 
102 	return clock_bits;
103 }
104 
105 
106 
107 /* The Mia has no ASIC. Just do nothing */
108 static int load_asic(struct echoaudio *chip)
109 {
110 	return 0;
111 }
112 
113 
114 
115 static int set_sample_rate(struct echoaudio *chip, u32 rate)
116 {
117 	u32 control_reg;
118 
119 	switch (rate) {
120 	case 96000:
121 		control_reg = MIA_96000;
122 		break;
123 	case 88200:
124 		control_reg = MIA_88200;
125 		break;
126 	case 48000:
127 		control_reg = MIA_48000;
128 		break;
129 	case 44100:
130 		control_reg = MIA_44100;
131 		break;
132 	case 32000:
133 		control_reg = MIA_32000;
134 		break;
135 	default:
136 		DE_ACT(("set_sample_rate: %d invalid!\n", rate));
137 		return -EINVAL;
138 	}
139 
140 	/* Override the clock setting if this Mia is set to S/PDIF clock */
141 	if (chip->input_clock == ECHO_CLOCK_SPDIF)
142 		control_reg |= MIA_SPDIF;
143 
144 	/* Set the control register if it has changed */
145 	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
146 		if (wait_handshake(chip))
147 			return -EIO;
148 
149 		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
150 		chip->comm_page->control_register = cpu_to_le32(control_reg);
151 		chip->sample_rate = rate;
152 
153 		clear_handshake(chip);
154 		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
155 	}
156 	return 0;
157 }
158 
159 
160 
161 static int set_input_clock(struct echoaudio *chip, u16 clock)
162 {
163 	DE_ACT(("set_input_clock(%d)\n", clock));
164 	snd_assert(clock == ECHO_CLOCK_INTERNAL || clock == ECHO_CLOCK_SPDIF,
165 		   return -EINVAL);
166 
167 	chip->input_clock = clock;
168 	return set_sample_rate(chip, chip->sample_rate);
169 }
170 
171 
172 
173 /* This function routes the sound from a virtual channel to a real output */
174 static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
175 			   int gain)
176 {
177 	int index;
178 
179 	snd_assert(pipe < num_pipes_out(chip) &&
180 		   output < num_busses_out(chip), return -EINVAL);
181 
182 	if (wait_handshake(chip))
183 		return -EIO;
184 
185 	chip->vmixer_gain[output][pipe] = gain;
186 	index = output * num_pipes_out(chip) + pipe;
187 	chip->comm_page->vmixer[index] = gain;
188 
189 	DE_ACT(("set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain));
190 	return 0;
191 }
192 
193 
194 
195 /* Tell the DSP to read and update virtual mixer levels in comm page. */
196 static int update_vmixer_level(struct echoaudio *chip)
197 {
198 	if (wait_handshake(chip))
199 		return -EIO;
200 	clear_handshake(chip);
201 	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
202 }
203 
204 
205 
206 /* Tell the DSP to reread the flags from the comm page */
207 static int update_flags(struct echoaudio *chip)
208 {
209 	if (wait_handshake(chip))
210 		return -EIO;
211 	clear_handshake(chip);
212 	return send_vector(chip, DSP_VC_UPDATE_FLAGS);
213 }
214 
215 
216 
217 static int set_professional_spdif(struct echoaudio *chip, char prof)
218 {
219 	DE_ACT(("set_professional_spdif %d\n", prof));
220 	if (prof)
221 		chip->comm_page->flags |=
222 			__constant_cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
223 	else
224 		chip->comm_page->flags &=
225 			~__constant_cpu_to_le32(DSP_FLAG_PROFESSIONAL_SPDIF);
226 	chip->professional_spdif = prof;
227 	return update_flags(chip);
228 }
229 
230