source: mainline/uspace/drv/audio/sb16/dsp.c@ e941bf8

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since e941bf8 was e941bf8, checked in by Jan Vesely <jano.vesely@…>, 13 years ago

audio/sb16: Remove optical separators.
  • Property mode set to 100644
File size: 8.7 KB
Line 
1/*
2 * Copyright (c) 2011 Jan Vesely
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28/** @addtogroup drvaudiosb16
29 * @{
30 */
31/** @file
32 * @brief DSP helper functions implementation
33 */
34
35#include <devman.h>
36#include <device/hw_res.h>
37#include <libarch/ddi.h>
38#include <libarch/barrier.h>
39#include <str_error.h>
40#include <bool.h>
41
42#include "dma.h"
43#include "ddf_log.h"
44#include "dsp_commands.h"
45#include "dsp.h"
46
47#define BUFFER_ID 1
48#define BUFFER_SIZE (PAGE_SIZE)
49#define PLAY_BLOCK_SIZE (BUFFER_SIZE / 2)
50
51#ifndef DSP_RETRY_COUNT
52#define DSP_RETRY_COUNT 100
53#endif
54
55#define DSP_RESET_RESPONSE 0xaa
56
57#define AUTO_DMA_MODE
58
59static inline int sb_dsp_read(sb_dsp_t *dsp, uint8_t *data)
60{
61 assert(data);
62 assert(dsp);
63 uint8_t status;
64 size_t attempts = DSP_RETRY_COUNT;
65 do {
66 status = pio_read_8(&dsp->regs->dsp_read_status);
67 } while (--attempts && ((status & DSP_READ_READY) == 0));
68
69 if ((status & DSP_READ_READY) == 0)
70 return EIO;
71
72 *data = pio_read_8(&dsp->regs->dsp_data_read);
73 return EOK;
74}
75
76static inline int sb_dsp_write(sb_dsp_t *dsp, uint8_t data)
77{
78 assert(dsp);
79 uint8_t status;
80 size_t attempts = DSP_RETRY_COUNT;
81 do {
82 status = pio_read_8(&dsp->regs->dsp_write);
83 } while (--attempts && ((status & DSP_WRITE_BUSY) != 0));
84
85 if ((status & DSP_WRITE_BUSY))
86 return EIO;
87
88 pio_write_8(&dsp->regs->dsp_write, data);
89 return EOK;
90}
91
92static inline void sb_dsp_reset(sb_dsp_t *dsp)
93{
94 assert(dsp);
95 /* Reset DSP, see Chapter 2 of Sound Blaster HW programming guide */
96 pio_write_8(&dsp->regs->dsp_reset, 1);
97 udelay(3); /* Keep reset for 3 us */
98 pio_write_8(&dsp->regs->dsp_reset, 0);
99}
100
101static inline int sb_setup_dma(sb_dsp_t *dsp, uintptr_t pa, size_t size)
102{
103 async_sess_t *sess = devman_parent_device_connect(EXCHANGE_ATOMIC,
104 dsp->sb_dev->handle, IPC_FLAG_BLOCKING);
105 if (!sess)
106 return ENOMEM;
107
108 const int ret = hw_res_dma_channel_setup(sess,
109 dsp->dma16_channel, pa, size,
110 DMA_MODE_READ | DMA_MODE_AUTO | DMA_MODE_ON_DEMAND);
111 async_hangup(sess);
112 return ret;
113}
114
115static inline int sb_setup_buffer(sb_dsp_t *dsp, size_t size)
116{
117 assert(dsp);
118 if (size > BUFFER_SIZE || size == 0 || (size % 2) == 1)
119 size = BUFFER_SIZE;
120 uint8_t *buffer = dma_create_buffer24(size);
121 if (buffer == NULL) {
122 ddf_log_error("Failed to allocate DMA buffer.");
123 return ENOMEM;
124 }
125
126 const uintptr_t pa = addr_to_phys(buffer);
127 assert(pa < (1 << 25));
128 /* Set 16 bit channel */
129 const int ret = sb_setup_dma(dsp, pa, size);
130 if (ret == EOK) {
131 dsp->buffer.data = buffer;
132 dsp->buffer.size = size;
133 bzero(dsp->buffer.data, dsp->buffer.size);
134 } else {
135 ddf_log_error("Failed to setup DMA16 channel: %s.",
136 str_error(ret));
137 dma_destroy_buffer(buffer);
138 }
139 return ret;
140}
141
142static inline void sb_clear_buffer(sb_dsp_t *dsp)
143{
144 dma_destroy_buffer(dsp->buffer.data);
145 dsp->buffer.data = NULL;
146 dsp->buffer.size = 0;
147}
148
149static inline size_t sample_count(unsigned sample_size, size_t byte_count)
150{
151 if (sample_size == 16) {
152 return byte_count / 2;
153 }
154 return byte_count;
155}
156
157int sb_dsp_init(sb_dsp_t *dsp, sb16_regs_t *regs, ddf_dev_t *dev,
158 int dma8, int dma16)
159{
160 assert(dsp);
161 dsp->regs = regs;
162 dsp->dma8_channel = dma8;
163 dsp->dma16_channel = dma16;
164 dsp->event_session = NULL;
165 dsp->event_exchange = NULL;
166 dsp->sb_dev = dev;
167 sb_dsp_reset(dsp);
168 /* "DSP takes about 100 microseconds to initialize itself" */
169 udelay(100);
170 uint8_t response;
171 const int ret = sb_dsp_read(dsp, &response);
172 if (ret != EOK) {
173 ddf_log_error("Failed to read DSP reset response value.");
174 return ret;
175 }
176 if (response != DSP_RESET_RESPONSE) {
177 ddf_log_error("Invalid DSP reset response: %x.", response);
178 return EIO;
179 }
180
181 /* Get DSP version number */
182 sb_dsp_write(dsp, DSP_VERSION);
183 sb_dsp_read(dsp, &dsp->version.major);
184 sb_dsp_read(dsp, &dsp->version.minor);
185
186 return ret;
187}
188
189void sb_dsp_interrupt(sb_dsp_t *dsp)
190{
191 assert(dsp);
192 if (dsp->event_exchange) {
193 ddf_log_verbose("Sending interrupt event.");
194 async_msg_0(dsp->event_exchange, IPC_FIRST_USER_METHOD);
195 } else {
196 ddf_log_warning("Interrupt with no event consumer.");
197 }
198#ifndef AUTO_DMA_MODE
199 sb_dsp_write(dsp, SINGLE_DMA_16B_DA);
200 sb_dsp_write(dsp, dsp->playing.mode);
201 sb_dsp_write(dsp, (dsp->playing.samples - 1) & 0xff);
202 sb_dsp_write(dsp, (dsp->playing.samples - 1) >> 8);
203#endif
204}
205
206int sb_dsp_get_buffer(sb_dsp_t *dsp, void **buffer, size_t *size, unsigned *id)
207{
208 assert(dsp);
209 assert(size);
210
211 /* buffer is already setup by for someone, refuse to work until
212 * it's released */
213 if (dsp->buffer.data)
214 return EBUSY;
215
216 const int ret = sb_setup_buffer(dsp, *size);
217 if (ret == EOK) {
218 ddf_log_debug("Providing buffer(%u): %p, %zu B.",
219 BUFFER_ID, dsp->buffer.data, dsp->buffer.size);
220
221 if (buffer)
222 *buffer = dsp->buffer.data;
223 if (size)
224 *size = dsp->buffer.size;
225 if (id)
226 *id = BUFFER_ID;
227 }
228 return ret;
229}
230
231int sb_dsp_set_event_session(sb_dsp_t *dsp, unsigned id, async_sess_t *session)
232{
233 assert(dsp);
234 assert(session);
235 if (id != BUFFER_ID)
236 return ENOENT;
237 if (dsp->event_session)
238 return EBUSY;
239 dsp->event_session = session;
240 ddf_log_debug("Set event session.");
241 return EOK;
242}
243
244int sb_dsp_release_buffer(sb_dsp_t *dsp, unsigned id)
245{
246 assert(dsp);
247 if (id != BUFFER_ID)
248 return ENOENT;
249 sb_clear_buffer(dsp);
250 if (dsp->event_exchange)
251 async_exchange_end(dsp->event_exchange);
252 dsp->event_exchange = NULL;
253 if (dsp->event_session)
254 async_hangup(dsp->event_session);
255 dsp->event_session = NULL;
256 ddf_log_debug("DSP buffer released.");
257 return EOK;
258}
259
260int sb_dsp_start_playback(sb_dsp_t *dsp, unsigned id, unsigned parts,
261 unsigned sampling_rate, unsigned sample_size, unsigned channels, bool sign)
262{
263 assert(dsp);
264
265 if (!dsp->event_session)
266 return EINVAL;
267
268 /* Play block size must be even number (we use DMA 16)*/
269 if (dsp->buffer.size % (parts * 2))
270 return EINVAL;
271
272 const unsigned play_block_size = dsp->buffer.size / parts;
273
274 /* Check supported parameters */
275 ddf_log_debug("Starting playback on buffer(%u): rate: %u, size: %u, "
276 " channels: %u, signed: %s.", id, sampling_rate, sample_size,
277 channels, sign ? "YES" : "NO" );
278 if (id != BUFFER_ID)
279 return ENOENT;
280 if (sample_size != 16) // FIXME We only support 16 bit playback
281 return ENOTSUP;
282 if (channels != 1 && channels != 2)
283 return ENOTSUP;
284 if (sampling_rate > 44100)
285 return ENOTSUP;
286
287 dsp->event_exchange = async_exchange_begin(dsp->event_session);
288 if (!dsp->event_exchange)
289 return ENOMEM;
290
291 sb_dsp_write(dsp, SET_SAMPLING_RATE_OUTPUT);
292 sb_dsp_write(dsp, sampling_rate >> 8);
293 sb_dsp_write(dsp, sampling_rate & 0xff);
294
295 ddf_log_debug("Sampling rate: %hhx:%hhx.",
296 sampling_rate >> 8, sampling_rate & 0xff);
297
298#ifdef AUTO_DMA_MODE
299 sb_dsp_write(dsp, AUTO_DMA_16B_DA_FIFO);
300#else
301 sb_dsp_write(dsp, SINGLE_DMA_16B_DA_FIFO);
302#endif
303
304 dsp->playing.mode = 0 |
305 (sign ? DSP_MODE_SIGNED : 0) | (channels == 2 ? DSP_MODE_STEREO : 0);
306 sb_dsp_write(dsp, dsp->playing.mode);
307
308 dsp->playing.samples = sample_count(sample_size, play_block_size);
309 sb_dsp_write(dsp, (dsp->playing.samples - 1) & 0xff);
310 sb_dsp_write(dsp, (dsp->playing.samples - 1) >> 8);
311
312 return EOK;
313}
314
315int sb_dsp_stop_playback(sb_dsp_t *dsp, unsigned id)
316{
317 assert(dsp);
318 if (id != BUFFER_ID)
319 return ENOENT;
320 async_exchange_end(dsp->event_exchange);
321 sb_dsp_write(dsp, DMA_16B_EXIT);
322 return EOK;
323}
324
325int sb_dsp_start_record(sb_dsp_t *dsp, unsigned id, unsigned sample_rate,
326 unsigned sample_size, unsigned channels, bool sign)
327{
328 return ENOTSUP;
329}
330
331int sb_dsp_stop_record(sb_dsp_t *dsp, unsigned id)
332{
333 return ENOTSUP;
334}
335/**
336 * @}
337 */
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