source: mainline/uspace/drv/audio/sb16/dsp.c@ 2f7042e

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 2f7042e was 00006e0, checked in by Jan Vesely <jano.vesely@…>, 13 years ago

audio: Allow client to specify buffer size.
  • Property mode set to 100644
File size: 8.6 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 buffer.\n");
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.\n",
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->sb_dev = dev;
165 sb_dsp_reset(dsp);
166 /* "DSP takes about 100 microseconds to initialize itself" */
167 udelay(100);
168 uint8_t response;
169 const int ret = sb_dsp_read(dsp, &response);
170 if (ret != EOK) {
171 ddf_log_error("Failed to read DSP reset response value.\n");
172 return ret;
173 }
174 if (response != DSP_RESET_RESPONSE) {
175 ddf_log_error("Invalid DSP reset response: %x.\n", response);
176 return EIO;
177 }
178
179 /* Get DSP version number */
180 sb_dsp_write(dsp, DSP_VERSION);
181 sb_dsp_read(dsp, &dsp->version.major);
182 sb_dsp_read(dsp, &dsp->version.minor);
183
184 return ret;
185}
186/*----------------------------------------------------------------------------*/
187void sb_dsp_interrupt(sb_dsp_t *dsp)
188{
189#ifndef AUTO_DMA_MODE
190 assert(dsp);
191 sb_dsp_write(dsp, SINGLE_DMA_16B_DA);
192 sb_dsp_write(dsp, dsp->playing.mode);
193 sb_dsp_write(dsp, (dsp->playing.samples - 1) & 0xff);
194 sb_dsp_write(dsp, (dsp->playing.samples - 1) >> 8);
195#endif
196}
197/*----------------------------------------------------------------------------*/
198int sb_dsp_get_buffer(sb_dsp_t *dsp, void **buffer, size_t *size, unsigned *id)
199{
200 assert(dsp);
201 assert(size);
202
203 const int ret = sb_setup_buffer(dsp, *size);
204 ddf_log_debug("Providing buffer(%u): %p, %zu B.\n",
205 BUFFER_ID, dsp->buffer.data, dsp->buffer.size);
206
207 if (ret == EOK && buffer)
208 *buffer = dsp->buffer.data;
209 if (ret == EOK && size)
210 *size = dsp->buffer.size;
211 if (ret == EOK && id)
212 *id = BUFFER_ID;
213 return ret;
214}
215/*----------------------------------------------------------------------------*/
216int sb_dsp_release_buffer(sb_dsp_t *dsp, unsigned id)
217{
218 assert(dsp);
219 if (id != BUFFER_ID)
220 return ENOENT;
221 sb_clear_buffer(dsp);
222 return EOK;
223}
224/*----------------------------------------------------------------------------*/
225int sb_dsp_start_playback(sb_dsp_t *dsp, unsigned id, unsigned sampling_rate,
226 unsigned sample_size, unsigned channels, bool sign)
227{
228 assert(dsp);
229
230 /* Check supported parameters */
231 ddf_log_debug("Starting playback on buffer(%u): rate: %u, size: %u, "
232 " channels: %u, signed: %s.\n", id, sampling_rate, sample_size,
233 channels, sign ? "YES" : "NO" );
234 if (id != BUFFER_ID)
235 return ENOENT;
236 if (sample_size != 16) // FIXME We only support 16 bit playback
237 return ENOTSUP;
238 if (channels != 1 && channels != 2)
239 return ENOTSUP;
240 if (sampling_rate > 44100)
241 return ENOTSUP;
242
243
244 sb_dsp_write(dsp, SET_SAMPLING_RATE_OUTPUT);
245 sb_dsp_write(dsp, sampling_rate >> 8);
246 sb_dsp_write(dsp, sampling_rate & 0xff);
247
248 ddf_log_debug("Sampling rate: %hhx:%hhx.\n",
249 sampling_rate >> 8, sampling_rate & 0xff);
250
251#ifdef AUTO_DMA_MODE
252 sb_dsp_write(dsp, AUTO_DMA_16B_DA_FIFO);
253#else
254 sb_dsp_write(dsp, SINGLE_DMA_16B_DA_FIFO);
255#endif
256
257 dsp->playing.mode = 0 |
258 (sign ? DSP_MODE_SIGNED : 0) | (channels == 2 ? DSP_MODE_STEREO : 0);
259 sb_dsp_write(dsp, dsp->playing.mode);
260
261 dsp->playing.samples = sample_count(sample_size, PLAY_BLOCK_SIZE);
262 sb_dsp_write(dsp, (dsp->playing.samples - 1) & 0xff);
263 sb_dsp_write(dsp, (dsp->playing.samples - 1) >> 8);
264
265 return EOK;
266 return ENOTSUP;
267}
268/*----------------------------------------------------------------------------*/
269int sb_dsp_stop_playback(sb_dsp_t *dsp, unsigned id)
270{
271 assert(dsp);
272 if (id != BUFFER_ID)
273 return ENOENT;
274 sb_dsp_write(dsp, DMA_16B_EXIT);
275 return EOK;
276}
277/*----------------------------------------------------------------------------*/
278int sb_dsp_start_record(sb_dsp_t *dsp, unsigned id, unsigned sample_rate,
279 unsigned sample_size, unsigned channels, bool sign)
280{
281 return ENOTSUP;
282}
283/*----------------------------------------------------------------------------*/
284int sb_dsp_stop_record(sb_dsp_t *dsp, unsigned id)
285{
286 return ENOTSUP;
287}
288/**
289 * @}
290 */
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