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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / staging / cx25821 / cx25821-audio-upstream.c
blobc20d6dece154ee66066c1456b1284f314b89a1ee
1 /*
2 * Driver for the Conexant CX25821 PCIe bridge
3 *
4 * Copyright (C) 2009 Conexant Systems Inc.
5 * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 *
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #include "cx25821-video.h"
26 #include "cx25821-audio-upstream.h"
27
28 #include <linux/fs.h>
29 #include <linux/errno.h>
30 #include <linux/kernel.h>
31 #include <linux/init.h>
32 #include <linux/module.h>
33 #include <linux/syscalls.h>
34 #include <linux/file.h>
35 #include <linux/fcntl.h>
36 #include <linux/delay.h>
37 #include <linux/slab.h>
38 #include <linux/uaccess.h>
39
40 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
41 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
42 MODULE_LICENSE("GPL");
43
44 static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
45 FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
46
47 int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
48 struct sram_channel *ch,
49 unsigned int bpl, u32 risc)
50 {
51 unsigned int i, lines;
52 u32 cdt;
53
54 if (ch->cmds_start == 0) {
55 cx_write(ch->ptr1_reg, 0);
56 cx_write(ch->ptr2_reg, 0);
57 cx_write(ch->cnt2_reg, 0);
58 cx_write(ch->cnt1_reg, 0);
59 return 0;
60 }
61
62 bpl = (bpl + 7) & ~7; /* alignment */
63 cdt = ch->cdt;
64 lines = ch->fifo_size / bpl;
65
66 if (lines > 3)
67 lines = 3;
68
69 BUG_ON(lines < 2);
70
71 /* write CDT */
72 for (i = 0; i < lines; i++) {
73 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
74 cx_write(cdt + 16 * i + 4, 0);
75 cx_write(cdt + 16 * i + 8, 0);
76 cx_write(cdt + 16 * i + 12, 0);
77 }
78
79 /* write CMDS */
80 cx_write(ch->cmds_start + 0, risc);
81
82 cx_write(ch->cmds_start + 4, 0);
83 cx_write(ch->cmds_start + 8, cdt);
84 cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW);
85 cx_write(ch->cmds_start + 16, ch->ctrl_start);
86
87 /* IQ size */
88 cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
89
90 for (i = 24; i < 80; i += 4)
91 cx_write(ch->cmds_start + i, 0);
92
93 /* fill registers */
94 cx_write(ch->ptr1_reg, ch->fifo_start);
95 cx_write(ch->ptr2_reg, cdt);
96 cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW);
97 cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1);
98
99 return 0;
100 }
101
102 static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
103 __le32 *rp,
104 dma_addr_t databuf_phys_addr,
105 unsigned int bpl,
106 int fifo_enable)
107 {
108 unsigned int line;
109 struct sram_channel *sram_ch =
110 dev->channels[dev->_audio_upstream_channel].sram_channels;
111 int offset = 0;
112
113 /* scan lines */
114 for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) {
115 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
116 *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
117 *(rp++) = cpu_to_le32(0); /* bits 63-32 */
118
119 /* Check if we need to enable the FIFO
120 * after the first 3 lines.
121 * For the upstream audio channel,
122 * the risc engine will enable the FIFO */
123 if (fifo_enable && line == 2) {
124 *(rp++) = RISC_WRITECR;
125 *(rp++) = sram_ch->dma_ctl;
126 *(rp++) = sram_ch->fld_aud_fifo_en;
127 *(rp++) = 0x00000020;
128 }
129
130 offset += AUDIO_LINE_SIZE;
131 }
132
133 return rp;
134 }
135
136 int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev,
137 struct pci_dev *pci,
138 unsigned int bpl, unsigned int lines)
139 {
140 __le32 *rp;
141 int fifo_enable = 0;
142 int frame = 0, i = 0;
143 int frame_size = AUDIO_DATA_BUF_SZ;
144 int databuf_offset = 0;
145 int risc_flag = RISC_CNT_INC;
146 dma_addr_t risc_phys_jump_addr;
147
148 /* Virtual address of Risc buffer program */
149 rp = dev->_risc_virt_addr;
150
151 /* sync instruction */
152 *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
153
154 for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) {
155 databuf_offset = frame_size * frame;
156
157 if (frame == 0) {
158 fifo_enable = 1;
159 risc_flag = RISC_CNT_RESET;
160 } else {
161 fifo_enable = 0;
162 risc_flag = RISC_CNT_INC;
163 }
164
165 /* Calculate physical jump address */
166 if ((frame + 1) == NUM_AUDIO_FRAMES) {
167 risc_phys_jump_addr =
168 dev->_risc_phys_start_addr +
169 RISC_SYNC_INSTRUCTION_SIZE;
170 } else {
171 risc_phys_jump_addr =
172 dev->_risc_phys_start_addr +
173 RISC_SYNC_INSTRUCTION_SIZE +
174 AUDIO_RISC_DMA_BUF_SIZE * (frame + 1);
175 }
176
177 rp = cx25821_risc_field_upstream_audio(dev, rp,
178 dev->
179 _audiodata_buf_phys_addr
180 + databuf_offset, bpl,
181 fifo_enable);
182
183 if (USE_RISC_NOOP_AUDIO) {
184 for (i = 0; i < NUM_NO_OPS; i++)
185 *(rp++) = cpu_to_le32(RISC_NOOP);
186 }
187
188 /* Loop to (Nth)FrameRISC or to Start of Risc program &
189 * generate IRQ */
190 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
191 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
192 *(rp++) = cpu_to_le32(0);
193
194 /* Recalculate virtual address based on frame index */
195 rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
196 (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
197 }
198
199 return 0;
200 }
201
202 void cx25821_free_memory_audio(struct cx25821_dev *dev)
203 {
204 if (dev->_risc_virt_addr) {
205 pci_free_consistent(dev->pci, dev->_audiorisc_size,
206 dev->_risc_virt_addr, dev->_risc_phys_addr);
207 dev->_risc_virt_addr = NULL;
208 }
209
210 if (dev->_audiodata_buf_virt_addr) {
211 pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
212 dev->_audiodata_buf_virt_addr,
213 dev->_audiodata_buf_phys_addr);
214 dev->_audiodata_buf_virt_addr = NULL;
215 }
216 }
217
218 void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
219 {
220 struct sram_channel *sram_ch =
221 dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
222 u32 tmp = 0;
223
224 if (!dev->_audio_is_running) {
225 printk(KERN_DEBUG
226 pr_fmt("No audio file is currently running so return!\n"));
227 return;
228 }
229 /* Disable RISC interrupts */
230 cx_write(sram_ch->int_msk, 0);
231
232 /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
233 tmp = cx_read(sram_ch->dma_ctl);
234 cx_write(sram_ch->dma_ctl,
235 tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
236
237 /* Clear data buffer memory */
238 if (dev->_audiodata_buf_virt_addr)
239 memset(dev->_audiodata_buf_virt_addr, 0,
240 dev->_audiodata_buf_size);
241
242 dev->_audio_is_running = 0;
243 dev->_is_first_audio_frame = 0;
244 dev->_audioframe_count = 0;
245 dev->_audiofile_status = END_OF_FILE;
246
247 kfree(dev->_irq_audio_queues);
248 dev->_irq_audio_queues = NULL;
249
250 kfree(dev->_audiofilename);
251 }
252
253 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
254 {
255 if (dev->_audio_is_running)
256 cx25821_stop_upstream_audio(dev);
257
258 cx25821_free_memory_audio(dev);
259 }
260
261 int cx25821_get_audio_data(struct cx25821_dev *dev,
262 struct sram_channel *sram_ch)
263 {
264 struct file *myfile;
265 int frame_index_temp = dev->_audioframe_index;
266 int i = 0;
267 int line_size = AUDIO_LINE_SIZE;
268 int frame_size = AUDIO_DATA_BUF_SZ;
269 int frame_offset = frame_size * frame_index_temp;
270 ssize_t vfs_read_retval = 0;
271 char mybuf[line_size];
272 loff_t file_offset = dev->_audioframe_count * frame_size;
273 loff_t pos;
274 mm_segment_t old_fs;
275
276 if (dev->_audiofile_status == END_OF_FILE)
277 return 0;
278
279 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
280
281 if (IS_ERR(myfile)) {
282 const int open_errno = -PTR_ERR(myfile);
283 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
284 __func__, dev->_audiofilename, open_errno);
285 return PTR_ERR(myfile);
286 } else {
287 if (!(myfile->f_op)) {
288 pr_err("%s(): File has no file operations registered!\n",
289 __func__);
290 filp_close(myfile, NULL);
291 return -EIO;
292 }
293
294 if (!myfile->f_op->read) {
295 pr_err("%s(): File has no READ operations registered!\n",
296 __func__);
297 filp_close(myfile, NULL);
298 return -EIO;
299 }
300
301 pos = myfile->f_pos;
302 old_fs = get_fs();
303 set_fs(KERNEL_DS);
304
305 for (i = 0; i < dev->_audio_lines_count; i++) {
306 pos = file_offset;
307
308 vfs_read_retval =
309 vfs_read(myfile, mybuf, line_size, &pos);
310
311 if (vfs_read_retval > 0 && vfs_read_retval == line_size
312 && dev->_audiodata_buf_virt_addr != NULL) {
313 memcpy((void *)(dev->_audiodata_buf_virt_addr +
314 frame_offset / 4), mybuf,
315 vfs_read_retval);
316 }
317
318 file_offset += vfs_read_retval;
319 frame_offset += vfs_read_retval;
320
321 if (vfs_read_retval < line_size) {
322 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
323 __func__);
324 break;
325 }
326 }
327
328 if (i > 0)
329 dev->_audioframe_count++;
330
331 dev->_audiofile_status =
332 (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
333
334 set_fs(old_fs);
335 filp_close(myfile, NULL);
336 }
337
338 return 0;
339 }
340
341 static void cx25821_audioups_handler(struct work_struct *work)
342 {
343 struct cx25821_dev *dev =
344 container_of(work, struct cx25821_dev, _audio_work_entry);
345
346 if (!dev) {
347 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n",
348 __func__);
349 return;
350 }
351
352 cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel].
353 sram_channels);
354 }
355
356 int cx25821_openfile_audio(struct cx25821_dev *dev,
357 struct sram_channel *sram_ch)
358 {
359 struct file *myfile;
360 int i = 0, j = 0;
361 int line_size = AUDIO_LINE_SIZE;
362 ssize_t vfs_read_retval = 0;
363 char mybuf[line_size];
364 loff_t pos;
365 loff_t offset = (unsigned long)0;
366 mm_segment_t old_fs;
367
368 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
369
370 if (IS_ERR(myfile)) {
371 const int open_errno = -PTR_ERR(myfile);
372 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
373 __func__, dev->_audiofilename, open_errno);
374 return PTR_ERR(myfile);
375 } else {
376 if (!(myfile->f_op)) {
377 pr_err("%s(): File has no file operations registered!\n",
378 __func__);
379 filp_close(myfile, NULL);
380 return -EIO;
381 }
382
383 if (!myfile->f_op->read) {
384 pr_err("%s(): File has no READ operations registered!\n",
385 __func__);
386 filp_close(myfile, NULL);
387 return -EIO;
388 }
389
390 pos = myfile->f_pos;
391 old_fs = get_fs();
392 set_fs(KERNEL_DS);
393
394 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
395 for (i = 0; i < dev->_audio_lines_count; i++) {
396 pos = offset;
397
398 vfs_read_retval =
399 vfs_read(myfile, mybuf, line_size, &pos);
400
401 if (vfs_read_retval > 0
402 && vfs_read_retval == line_size
403 && dev->_audiodata_buf_virt_addr != NULL) {
404 memcpy((void *)(dev->
405 _audiodata_buf_virt_addr
406 + offset / 4), mybuf,
407 vfs_read_retval);
408 }
409
410 offset += vfs_read_retval;
411
412 if (vfs_read_retval < line_size) {
413 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
414 __func__);
415 break;
416 }
417 }
418
419 if (i > 0)
420 dev->_audioframe_count++;
421
422 if (vfs_read_retval < line_size)
423 break;
424 }
425
426 dev->_audiofile_status =
427 (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
428
429 set_fs(old_fs);
430 myfile->f_pos = 0;
431 filp_close(myfile, NULL);
432 }
433
434 return 0;
435 }
436
437 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
438 struct sram_channel *sram_ch,
439 int bpl)
440 {
441 int ret = 0;
442 dma_addr_t dma_addr;
443 dma_addr_t data_dma_addr;
444
445 cx25821_free_memory_audio(dev);
446
447 dev->_risc_virt_addr =
448 pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
449 &dma_addr);
450 dev->_risc_virt_start_addr = dev->_risc_virt_addr;
451 dev->_risc_phys_start_addr = dma_addr;
452 dev->_risc_phys_addr = dma_addr;
453 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
454
455 if (!dev->_risc_virt_addr) {
456 printk(KERN_DEBUG
457 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
458 return -ENOMEM;
459 }
460 /* Clear out memory at address */
461 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
462
463 /* For Audio Data buffer allocation */
464 dev->_audiodata_buf_virt_addr =
465 pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
466 &data_dma_addr);
467 dev->_audiodata_buf_phys_addr = data_dma_addr;
468 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
469
470 if (!dev->_audiodata_buf_virt_addr) {
471 printk(KERN_DEBUG
472 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
473 return -ENOMEM;
474 }
475 /* Clear out memory at address */
476 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
477
478 ret = cx25821_openfile_audio(dev, sram_ch);
479 if (ret < 0)
480 return ret;
481
482 /* Creating RISC programs */
483 ret =
484 cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
485 dev->_audio_lines_count);
486 if (ret < 0) {
487 printk(KERN_DEBUG
488 pr_fmt("ERROR creating audio upstream RISC programs!\n"));
489 goto error;
490 }
491
492 return 0;
493
494 error:
495 return ret;
496 }
497
498 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
499 u32 status)
500 {
501 int i = 0;
502 u32 int_msk_tmp;
503 struct sram_channel *channel = dev->channels[chan_num].sram_channels;
504 dma_addr_t risc_phys_jump_addr;
505 __le32 *rp;
506
507 if (status & FLD_AUD_SRC_RISCI1) {
508 /* Get interrupt_index of the program that interrupted */
509 u32 prog_cnt = cx_read(channel->gpcnt);
510
511 /* Since we've identified our IRQ, clear our bits from the
512 * interrupt mask and interrupt status registers */
513 cx_write(channel->int_msk, 0);
514 cx_write(channel->int_stat, cx_read(channel->int_stat));
515
516 spin_lock(&dev->slock);
517
518 while (prog_cnt != dev->_last_index_irq) {
519 /* Update _last_index_irq */
520 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
521 dev->_last_index_irq++;
522 else
523 dev->_last_index_irq = 0;
524
525 dev->_audioframe_index = dev->_last_index_irq;
526
527 queue_work(dev->_irq_audio_queues,
528 &dev->_audio_work_entry);
529 }
530
531 if (dev->_is_first_audio_frame) {
532 dev->_is_first_audio_frame = 0;
533
534 if (dev->_risc_virt_start_addr != NULL) {
535 risc_phys_jump_addr =
536 dev->_risc_phys_start_addr +
537 RISC_SYNC_INSTRUCTION_SIZE +
538 AUDIO_RISC_DMA_BUF_SIZE;
539
540 rp = cx25821_risc_field_upstream_audio(dev,
541 dev->_risc_virt_start_addr + 1,
542 dev->_audiodata_buf_phys_addr,
543 AUDIO_LINE_SIZE, FIFO_DISABLE);
544
545 if (USE_RISC_NOOP_AUDIO) {
546 for (i = 0; i < NUM_NO_OPS; i++) {
547 *(rp++) =
548 cpu_to_le32(RISC_NOOP);
549 }
550 }
551 /* Jump to 2nd Audio Frame */
552 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
553 RISC_CNT_RESET);
554 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
555 *(rp++) = cpu_to_le32(0);
556 }
557 }
558
559 spin_unlock(&dev->slock);
560 } else {
561 if (status & FLD_AUD_SRC_OF)
562 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
563 __func__);
564
565 if (status & FLD_AUD_SRC_SYNC)
566 pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
567 __func__);
568
569 if (status & FLD_AUD_SRC_OPC_ERR)
570 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
571 __func__);
572
573 /* Read and write back the interrupt status register to clear
574 * our bits */
575 cx_write(channel->int_stat, cx_read(channel->int_stat));
576 }
577
578 if (dev->_audiofile_status == END_OF_FILE) {
579 pr_warn("EOF Channel Audio Framecount = %d\n",
580 dev->_audioframe_count);
581 return -1;
582 }
583 /* ElSE, set the interrupt mask register, re-enable irq. */
584 int_msk_tmp = cx_read(channel->int_msk);
585 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
586
587 return 0;
588 }
589
590 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
591 {
592 struct cx25821_dev *dev = dev_id;
593 u32 msk_stat, audio_status;
594 int handled = 0;
595 struct sram_channel *sram_ch;
596
597 if (!dev)
598 return -1;
599
600 sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels;
601
602 msk_stat = cx_read(sram_ch->int_mstat);
603 audio_status = cx_read(sram_ch->int_stat);
604
605 /* Only deal with our interrupt */
606 if (audio_status) {
607 handled = cx25821_audio_upstream_irq(dev,
608 dev->_audio_upstream_channel, audio_status);
609 }
610
611 if (handled < 0)
612 cx25821_stop_upstream_audio(dev);
613 else
614 handled += handled;
615
616 return IRQ_RETVAL(handled);
617 }
618
619 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
620 struct sram_channel *sram_ch)
621 {
622 int count = 0;
623 u32 tmp;
624
625 do {
626 /* Wait 10 microsecond before checking to see if the FIFO is
627 * turned ON. */
628 udelay(10);
629
630 tmp = cx_read(sram_ch->dma_ctl);
631
632 /* 10 millisecond timeout */
633 if (count++ > 1000) {
634 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
635 __func__);
636 return;
637 }
638
639 } while (!(tmp & sram_ch->fld_aud_fifo_en));
640
641 }
642
643 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
644 struct sram_channel *sram_ch)
645 {
646 u32 tmp = 0;
647 int err = 0;
648
649 /* Set the physical start address of the RISC program in the initial
650 * program counter(IPC) member of the CMDS. */
651 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
652 /* Risc IPC High 64 bits 63-32 */
653 cx_write(sram_ch->cmds_start + 4, 0);
654
655 /* reset counter */
656 cx_write(sram_ch->gpcnt_ctl, 3);
657
658 /* Set the line length (It looks like we do not need to set the
659 * line length) */
660 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
661
662 /* Set the input mode to 16-bit */
663 tmp = cx_read(sram_ch->aud_cfg);
664 tmp |=
665 FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
666 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
667 cx_write(sram_ch->aud_cfg, tmp);
668
669 /* Read and write back the interrupt status register to clear it */
670 tmp = cx_read(sram_ch->int_stat);
671 cx_write(sram_ch->int_stat, tmp);
672
673 /* Clear our bits from the interrupt status register. */
674 cx_write(sram_ch->int_stat, _intr_msk);
675
676 /* Set the interrupt mask register, enable irq. */
677 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
678 tmp = cx_read(sram_ch->int_msk);
679 cx_write(sram_ch->int_msk, tmp |= _intr_msk);
680
681 err =
682 request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
683 IRQF_SHARED, dev->name, dev);
684 if (err < 0) {
685 pr_err("%s: can't get upstream IRQ %d\n",
686 dev->name, dev->pci->irq);
687 goto fail_irq;
688 }
689
690 /* Start the DMA engine */
691 tmp = cx_read(sram_ch->dma_ctl);
692 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
693
694 dev->_audio_is_running = 1;
695 dev->_is_first_audio_frame = 1;
696
697 /* The fifo_en bit turns on by the first Risc program */
698 cx25821_wait_fifo_enable(dev, sram_ch);
699
700 return 0;
701
702 fail_irq:
703 cx25821_dev_unregister(dev);
704 return err;
705 }
706
707 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
708 {
709 struct sram_channel *sram_ch;
710 int retval = 0;
711 int err = 0;
712 int str_length = 0;
713
714 if (dev->_audio_is_running) {
715 pr_warn("Audio Channel is still running so return!\n");
716 return 0;
717 }
718
719 dev->_audio_upstream_channel = channel_select;
720 sram_ch = dev->channels[channel_select].sram_channels;
721
722 /* Work queue */
723 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
724 dev->_irq_audio_queues =
725 create_singlethread_workqueue("cx25821_audioworkqueue");
726
727 if (!dev->_irq_audio_queues) {
728 printk(KERN_DEBUG
729 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
730 return -ENOMEM;
731 }
732
733 dev->_last_index_irq = 0;
734 dev->_audio_is_running = 0;
735 dev->_audioframe_count = 0;
736 dev->_audiofile_status = RESET_STATUS;
737 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
738 _line_size = AUDIO_LINE_SIZE;
739
740 if (dev->input_audiofilename) {
741 str_length = strlen(dev->input_audiofilename);
742 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
743
744 if (!dev->_audiofilename)
745 goto error;
746
747 memcpy(dev->_audiofilename, dev->input_audiofilename,
748 str_length + 1);
749
750 /* Default if filename is empty string */
751 if (strcmp(dev->input_audiofilename, "") == 0)
752 dev->_audiofilename = "/root/audioGOOD.wav";
753 } else {
754 str_length = strlen(_defaultAudioName);
755 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
756
757 if (!dev->_audiofilename)
758 goto error;
759
760 memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
761 }
762
763 retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
764 _line_size, 0);
765
766 dev->audio_upstream_riscbuf_size =
767 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
768 RISC_SYNC_INSTRUCTION_SIZE;
769 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
770
771 /* Allocating buffers and prepare RISC program */
772 retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
773 _line_size);
774 if (retval < 0) {
775 pr_err("%s: Failed to set up Audio upstream buffers!\n",
776 dev->name);
777 goto error;
778 }
779 /* Start RISC engine */
780 cx25821_start_audio_dma_upstream(dev, sram_ch);
781
782 return 0;
783
784 error:
785 cx25821_dev_unregister(dev);
786
787 return err;
788 }
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