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
cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev * dev,struct sram_channel * ch,unsigned int bpl,u32 risc)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
cx25821_risc_field_upstream_audio(struct cx25821_dev * dev,__le32 * rp,dma_addr_t databuf_phys_addr,unsigned int bpl,int fifo_enable)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_select].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
cx25821_risc_buffer_upstream_audio(struct cx25821_dev * dev,struct pci_dev * pci,unsigned int bpl,unsigned int lines)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
cx25821_free_memory_audio(struct cx25821_dev * dev)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
cx25821_stop_upstream_audio(struct cx25821_dev * dev)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
cx25821_free_mem_upstream_audio(struct cx25821_dev * dev)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
cx25821_get_audio_data(struct cx25821_dev * dev,struct sram_channel * sram_ch)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
cx25821_audioups_handler(struct work_struct * work)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,
353 dev->channels[dev->
354 _audio_upstream_channel_select].
355 sram_channels);
356 }
357
cx25821_openfile_audio(struct cx25821_dev * dev,struct sram_channel * sram_ch)358 int cx25821_openfile_audio(struct cx25821_dev *dev,
359 struct sram_channel *sram_ch)
360 {
361 struct file *myfile;
362 int i = 0, j = 0;
363 int line_size = AUDIO_LINE_SIZE;
364 ssize_t vfs_read_retval = 0;
365 char mybuf[line_size];
366 loff_t pos;
367 loff_t offset = (unsigned long)0;
368 mm_segment_t old_fs;
369
370 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
371
372 if (IS_ERR(myfile)) {
373 const int open_errno = -PTR_ERR(myfile);
374 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
375 __func__, dev->_audiofilename, open_errno);
376 return PTR_ERR(myfile);
377 } else {
378 if (!(myfile->f_op)) {
379 pr_err("%s(): File has no file operations registered!\n",
380 __func__);
381 filp_close(myfile, NULL);
382 return -EIO;
383 }
384
385 if (!myfile->f_op->read) {
386 pr_err("%s(): File has no READ operations registered!\n",
387 __func__);
388 filp_close(myfile, NULL);
389 return -EIO;
390 }
391
392 pos = myfile->f_pos;
393 old_fs = get_fs();
394 set_fs(KERNEL_DS);
395
396 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
397 for (i = 0; i < dev->_audio_lines_count; i++) {
398 pos = offset;
399
400 vfs_read_retval =
401 vfs_read(myfile, mybuf, line_size, &pos);
402
403 if (vfs_read_retval > 0
404 && vfs_read_retval == line_size
405 && dev->_audiodata_buf_virt_addr != NULL) {
406 memcpy((void *)(dev->
407 _audiodata_buf_virt_addr
408 + offset / 4), mybuf,
409 vfs_read_retval);
410 }
411
412 offset += vfs_read_retval;
413
414 if (vfs_read_retval < line_size) {
415 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
416 __func__);
417 break;
418 }
419 }
420
421 if (i > 0)
422 dev->_audioframe_count++;
423
424 if (vfs_read_retval < line_size)
425 break;
426 }
427
428 dev->_audiofile_status =
429 (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
430
431 set_fs(old_fs);
432 myfile->f_pos = 0;
433 filp_close(myfile, NULL);
434 }
435
436 return 0;
437 }
438
cx25821_audio_upstream_buffer_prepare(struct cx25821_dev * dev,struct sram_channel * sram_ch,int bpl)439 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
440 struct sram_channel *sram_ch,
441 int bpl)
442 {
443 int ret = 0;
444 dma_addr_t dma_addr;
445 dma_addr_t data_dma_addr;
446
447 cx25821_free_memory_audio(dev);
448
449 dev->_risc_virt_addr =
450 pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
451 &dma_addr);
452 dev->_risc_virt_start_addr = dev->_risc_virt_addr;
453 dev->_risc_phys_start_addr = dma_addr;
454 dev->_risc_phys_addr = dma_addr;
455 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
456
457 if (!dev->_risc_virt_addr) {
458 printk(KERN_DEBUG
459 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
460 return -ENOMEM;
461 }
462 /* Clear out memory at address */
463 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
464
465 /* For Audio Data buffer allocation */
466 dev->_audiodata_buf_virt_addr =
467 pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
468 &data_dma_addr);
469 dev->_audiodata_buf_phys_addr = data_dma_addr;
470 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
471
472 if (!dev->_audiodata_buf_virt_addr) {
473 printk(KERN_DEBUG
474 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
475 return -ENOMEM;
476 }
477 /* Clear out memory at address */
478 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
479
480 ret = cx25821_openfile_audio(dev, sram_ch);
481 if (ret < 0)
482 return ret;
483
484 /* Creating RISC programs */
485 ret =
486 cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
487 dev->_audio_lines_count);
488 if (ret < 0) {
489 printk(KERN_DEBUG
490 pr_fmt("ERROR creating audio upstream RISC programs!\n"));
491 goto error;
492 }
493
494 return 0;
495
496 error:
497 return ret;
498 }
499
cx25821_audio_upstream_irq(struct cx25821_dev * dev,int chan_num,u32 status)500 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
501 u32 status)
502 {
503 int i = 0;
504 u32 int_msk_tmp;
505 struct sram_channel *channel = dev->channels[chan_num].sram_channels;
506 dma_addr_t risc_phys_jump_addr;
507 __le32 *rp;
508
509 if (status & FLD_AUD_SRC_RISCI1) {
510 /* Get interrupt_index of the program that interrupted */
511 u32 prog_cnt = cx_read(channel->gpcnt);
512
513 /* Since we've identified our IRQ, clear our bits from the
514 * interrupt mask and interrupt status registers */
515 cx_write(channel->int_msk, 0);
516 cx_write(channel->int_stat, cx_read(channel->int_stat));
517
518 spin_lock(&dev->slock);
519
520 while (prog_cnt != dev->_last_index_irq) {
521 /* Update _last_index_irq */
522 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
523 dev->_last_index_irq++;
524 else
525 dev->_last_index_irq = 0;
526
527 dev->_audioframe_index = dev->_last_index_irq;
528
529 queue_work(dev->_irq_audio_queues,
530 &dev->_audio_work_entry);
531 }
532
533 if (dev->_is_first_audio_frame) {
534 dev->_is_first_audio_frame = 0;
535
536 if (dev->_risc_virt_start_addr != NULL) {
537 risc_phys_jump_addr =
538 dev->_risc_phys_start_addr +
539 RISC_SYNC_INSTRUCTION_SIZE +
540 AUDIO_RISC_DMA_BUF_SIZE;
541
542 rp = cx25821_risc_field_upstream_audio(dev,
543 dev->
544 _risc_virt_start_addr
545 + 1,
546 dev->
547 _audiodata_buf_phys_addr,
548 AUDIO_LINE_SIZE,
549 FIFO_DISABLE);
550
551 if (USE_RISC_NOOP_AUDIO) {
552 for (i = 0; i < NUM_NO_OPS; i++) {
553 *(rp++) =
554 cpu_to_le32(RISC_NOOP);
555 }
556 }
557 /* Jump to 2nd Audio Frame */
558 *(rp++) =
559 cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
560 RISC_CNT_RESET);
561 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
562 *(rp++) = cpu_to_le32(0);
563 }
564 }
565
566 spin_unlock(&dev->slock);
567 } else {
568 if (status & FLD_AUD_SRC_OF)
569 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
570 __func__);
571
572 if (status & FLD_AUD_SRC_SYNC)
573 pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
574 __func__);
575
576 if (status & FLD_AUD_SRC_OPC_ERR)
577 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
578 __func__);
579
580 /* Read and write back the interrupt status register to clear
581 * our bits */
582 cx_write(channel->int_stat, cx_read(channel->int_stat));
583 }
584
585 if (dev->_audiofile_status == END_OF_FILE) {
586 pr_warn("EOF Channel Audio Framecount = %d\n",
587 dev->_audioframe_count);
588 return -1;
589 }
590 /* ElSE, set the interrupt mask register, re-enable irq. */
591 int_msk_tmp = cx_read(channel->int_msk);
592 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
593
594 return 0;
595 }
596
cx25821_upstream_irq_audio(int irq,void * dev_id)597 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
598 {
599 struct cx25821_dev *dev = dev_id;
600 u32 msk_stat, audio_status;
601 int handled = 0;
602 struct sram_channel *sram_ch;
603
604 if (!dev)
605 return -1;
606
607 sram_ch = dev->channels[dev->_audio_upstream_channel_select].sram_channels;
608
609 msk_stat = cx_read(sram_ch->int_mstat);
610 audio_status = cx_read(sram_ch->int_stat);
611
612 /* Only deal with our interrupt */
613 if (audio_status) {
614 handled =
615 cx25821_audio_upstream_irq(dev,
616 dev->
617 _audio_upstream_channel_select,
618 audio_status);
619 }
620
621 if (handled < 0)
622 cx25821_stop_upstream_audio(dev);
623 else
624 handled += handled;
625
626 return IRQ_RETVAL(handled);
627 }
628
cx25821_wait_fifo_enable(struct cx25821_dev * dev,struct sram_channel * sram_ch)629 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
630 struct sram_channel *sram_ch)
631 {
632 int count = 0;
633 u32 tmp;
634
635 do {
636 /* Wait 10 microsecond before checking to see if the FIFO is
637 * turned ON. */
638 udelay(10);
639
640 tmp = cx_read(sram_ch->dma_ctl);
641
642 /* 10 millisecond timeout */
643 if (count++ > 1000) {
644 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
645 __func__);
646 return;
647 }
648
649 } while (!(tmp & sram_ch->fld_aud_fifo_en));
650
651 }
652
cx25821_start_audio_dma_upstream(struct cx25821_dev * dev,struct sram_channel * sram_ch)653 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
654 struct sram_channel *sram_ch)
655 {
656 u32 tmp = 0;
657 int err = 0;
658
659 /* Set the physical start address of the RISC program in the initial
660 * program counter(IPC) member of the CMDS. */
661 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
662 /* Risc IPC High 64 bits 63-32 */
663 cx_write(sram_ch->cmds_start + 4, 0);
664
665 /* reset counter */
666 cx_write(sram_ch->gpcnt_ctl, 3);
667
668 /* Set the line length (It looks like we do not need to set the
669 * line length) */
670 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
671
672 /* Set the input mode to 16-bit */
673 tmp = cx_read(sram_ch->aud_cfg);
674 tmp |=
675 FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
676 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
677 cx_write(sram_ch->aud_cfg, tmp);
678
679 /* Read and write back the interrupt status register to clear it */
680 tmp = cx_read(sram_ch->int_stat);
681 cx_write(sram_ch->int_stat, tmp);
682
683 /* Clear our bits from the interrupt status register. */
684 cx_write(sram_ch->int_stat, _intr_msk);
685
686 /* Set the interrupt mask register, enable irq. */
687 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
688 tmp = cx_read(sram_ch->int_msk);
689 cx_write(sram_ch->int_msk, tmp |= _intr_msk);
690
691 err =
692 request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
693 IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
694 if (err < 0) {
695 pr_err("%s: can't get upstream IRQ %d\n",
696 dev->name, dev->pci->irq);
697 goto fail_irq;
698 }
699
700 /* Start the DMA engine */
701 tmp = cx_read(sram_ch->dma_ctl);
702 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
703
704 dev->_audio_is_running = 1;
705 dev->_is_first_audio_frame = 1;
706
707 /* The fifo_en bit turns on by the first Risc program */
708 cx25821_wait_fifo_enable(dev, sram_ch);
709
710 return 0;
711
712 fail_irq:
713 cx25821_dev_unregister(dev);
714 return err;
715 }
716
cx25821_audio_upstream_init(struct cx25821_dev * dev,int channel_select)717 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
718 {
719 struct sram_channel *sram_ch;
720 int retval = 0;
721 int err = 0;
722 int str_length = 0;
723
724 if (dev->_audio_is_running) {
725 pr_warn("Audio Channel is still running so return!\n");
726 return 0;
727 }
728
729 dev->_audio_upstream_channel_select = channel_select;
730 sram_ch = dev->channels[channel_select].sram_channels;
731
732 /* Work queue */
733 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
734 dev->_irq_audio_queues =
735 create_singlethread_workqueue("cx25821_audioworkqueue");
736
737 if (!dev->_irq_audio_queues) {
738 printk(KERN_DEBUG
739 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
740 return -ENOMEM;
741 }
742
743 dev->_last_index_irq = 0;
744 dev->_audio_is_running = 0;
745 dev->_audioframe_count = 0;
746 dev->_audiofile_status = RESET_STATUS;
747 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
748 _line_size = AUDIO_LINE_SIZE;
749
750 if (dev->input_audiofilename) {
751 str_length = strlen(dev->input_audiofilename);
752 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
753
754 if (!dev->_audiofilename)
755 goto error;
756
757 memcpy(dev->_audiofilename, dev->input_audiofilename,
758 str_length + 1);
759
760 /* Default if filename is empty string */
761 if (strcmp(dev->input_audiofilename, "") == 0)
762 dev->_audiofilename = "/root/audioGOOD.wav";
763 } else {
764 str_length = strlen(_defaultAudioName);
765 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
766
767 if (!dev->_audiofilename)
768 goto error;
769
770 memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
771 }
772
773 retval =
774 cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size,
775 0);
776
777 dev->audio_upstream_riscbuf_size =
778 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
779 RISC_SYNC_INSTRUCTION_SIZE;
780 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
781
782 /* Allocating buffers and prepare RISC program */
783 retval =
784 cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size);
785 if (retval < 0) {
786 pr_err("%s: Failed to set up Audio upstream buffers!\n",
787 dev->name);
788 goto error;
789 }
790 /* Start RISC engine */
791 cx25821_start_audio_dma_upstream(dev, sram_ch);
792
793 return 0;
794
795 error:
796 cx25821_dev_unregister(dev);
797
798 return err;
799 }
800