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].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->_audiodata_buf_phys_addr + databuf_offset,
179 bpl, fifo_enable);
180
181 if (USE_RISC_NOOP_AUDIO) {
182 for (i = 0; i < NUM_NO_OPS; i++)
183 *(rp++) = cpu_to_le32(RISC_NOOP);
184 }
185
186 /* Loop to (Nth)FrameRISC or to Start of Risc program &
187 * generate IRQ */
188 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
189 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
190 *(rp++) = cpu_to_le32(0);
191
192 /* Recalculate virtual address based on frame index */
193 rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
194 (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
195 }
196
197 return 0;
198 }
199
cx25821_free_memory_audio(struct cx25821_dev * dev)200 void cx25821_free_memory_audio(struct cx25821_dev *dev)
201 {
202 if (dev->_risc_virt_addr) {
203 pci_free_consistent(dev->pci, dev->_audiorisc_size,
204 dev->_risc_virt_addr, dev->_risc_phys_addr);
205 dev->_risc_virt_addr = NULL;
206 }
207
208 if (dev->_audiodata_buf_virt_addr) {
209 pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
210 dev->_audiodata_buf_virt_addr,
211 dev->_audiodata_buf_phys_addr);
212 dev->_audiodata_buf_virt_addr = NULL;
213 }
214 }
215
cx25821_stop_upstream_audio(struct cx25821_dev * dev)216 void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
217 {
218 struct sram_channel *sram_ch =
219 dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
220 u32 tmp = 0;
221
222 if (!dev->_audio_is_running) {
223 printk(KERN_DEBUG
224 pr_fmt("No audio file is currently running so return!\n"));
225 return;
226 }
227 /* Disable RISC interrupts */
228 cx_write(sram_ch->int_msk, 0);
229
230 /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
231 tmp = cx_read(sram_ch->dma_ctl);
232 cx_write(sram_ch->dma_ctl,
233 tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
234
235 /* Clear data buffer memory */
236 if (dev->_audiodata_buf_virt_addr)
237 memset(dev->_audiodata_buf_virt_addr, 0,
238 dev->_audiodata_buf_size);
239
240 dev->_audio_is_running = 0;
241 dev->_is_first_audio_frame = 0;
242 dev->_audioframe_count = 0;
243 dev->_audiofile_status = END_OF_FILE;
244
245 kfree(dev->_irq_audio_queues);
246 dev->_irq_audio_queues = NULL;
247
248 kfree(dev->_audiofilename);
249 }
250
cx25821_free_mem_upstream_audio(struct cx25821_dev * dev)251 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
252 {
253 if (dev->_audio_is_running)
254 cx25821_stop_upstream_audio(dev);
255
256 cx25821_free_memory_audio(dev);
257 }
258
cx25821_get_audio_data(struct cx25821_dev * dev,struct sram_channel * sram_ch)259 int cx25821_get_audio_data(struct cx25821_dev *dev,
260 struct sram_channel *sram_ch)
261 {
262 struct file *myfile;
263 int frame_index_temp = dev->_audioframe_index;
264 int i = 0;
265 int line_size = AUDIO_LINE_SIZE;
266 int frame_size = AUDIO_DATA_BUF_SZ;
267 int frame_offset = frame_size * frame_index_temp;
268 ssize_t vfs_read_retval = 0;
269 char mybuf[line_size];
270 loff_t file_offset = dev->_audioframe_count * frame_size;
271 loff_t pos;
272 mm_segment_t old_fs;
273
274 if (dev->_audiofile_status == END_OF_FILE)
275 return 0;
276
277 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
278
279 if (IS_ERR(myfile)) {
280 const int open_errno = -PTR_ERR(myfile);
281 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
282 __func__, dev->_audiofilename, open_errno);
283 return PTR_ERR(myfile);
284 } else {
285 if (!(myfile->f_op)) {
286 pr_err("%s(): File has no file operations registered!\n",
287 __func__);
288 filp_close(myfile, NULL);
289 return -EIO;
290 }
291
292 if (!myfile->f_op->read) {
293 pr_err("%s(): File has no READ operations registered!\n",
294 __func__);
295 filp_close(myfile, NULL);
296 return -EIO;
297 }
298
299 pos = myfile->f_pos;
300 old_fs = get_fs();
301 set_fs(KERNEL_DS);
302
303 for (i = 0; i < dev->_audio_lines_count; i++) {
304 pos = file_offset;
305
306 vfs_read_retval = vfs_read(myfile, mybuf, line_size,
307 &pos);
308
309 if (vfs_read_retval > 0 && vfs_read_retval == line_size
310 && dev->_audiodata_buf_virt_addr != NULL) {
311 memcpy((void *)(dev->_audiodata_buf_virt_addr +
312 frame_offset / 4), mybuf,
313 vfs_read_retval);
314 }
315
316 file_offset += vfs_read_retval;
317 frame_offset += vfs_read_retval;
318
319 if (vfs_read_retval < line_size) {
320 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
321 __func__);
322 break;
323 }
324 }
325
326 if (i > 0)
327 dev->_audioframe_count++;
328
329 dev->_audiofile_status = (vfs_read_retval == line_size) ?
330 IN_PROGRESS : END_OF_FILE;
331
332 set_fs(old_fs);
333 filp_close(myfile, NULL);
334 }
335
336 return 0;
337 }
338
cx25821_audioups_handler(struct work_struct * work)339 static void cx25821_audioups_handler(struct work_struct *work)
340 {
341 struct cx25821_dev *dev = container_of(work, struct cx25821_dev,
342 _audio_work_entry);
343
344 if (!dev) {
345 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n",
346 __func__);
347 return;
348 }
349
350 cx25821_get_audio_data(dev, dev->channels[dev->_audio_upstream_channel].
351 sram_channels);
352 }
353
cx25821_openfile_audio(struct cx25821_dev * dev,struct sram_channel * sram_ch)354 int cx25821_openfile_audio(struct cx25821_dev *dev,
355 struct sram_channel *sram_ch)
356 {
357 struct file *myfile;
358 int i = 0, j = 0;
359 int line_size = AUDIO_LINE_SIZE;
360 ssize_t vfs_read_retval = 0;
361 char mybuf[line_size];
362 loff_t pos;
363 loff_t offset = (unsigned long)0;
364 mm_segment_t old_fs;
365
366 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
367
368 if (IS_ERR(myfile)) {
369 const int open_errno = -PTR_ERR(myfile);
370 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
371 __func__, dev->_audiofilename, open_errno);
372 return PTR_ERR(myfile);
373 } else {
374 if (!(myfile->f_op)) {
375 pr_err("%s(): File has no file operations registered!\n",
376 __func__);
377 filp_close(myfile, NULL);
378 return -EIO;
379 }
380
381 if (!myfile->f_op->read) {
382 pr_err("%s(): File has no READ operations registered!\n",
383 __func__);
384 filp_close(myfile, NULL);
385 return -EIO;
386 }
387
388 pos = myfile->f_pos;
389 old_fs = get_fs();
390 set_fs(KERNEL_DS);
391
392 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
393 for (i = 0; i < dev->_audio_lines_count; i++) {
394 pos = offset;
395
396 vfs_read_retval = vfs_read(myfile, mybuf,
397 line_size, &pos);
398
399 if (vfs_read_retval > 0 &&
400 vfs_read_retval == line_size &&
401 dev->_audiodata_buf_virt_addr != NULL) {
402 memcpy((void *)(dev->
403 _audiodata_buf_virt_addr
404 + offset / 4), mybuf,
405 vfs_read_retval);
406 }
407
408 offset += vfs_read_retval;
409
410 if (vfs_read_retval < line_size) {
411 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
412 __func__);
413 break;
414 }
415 }
416
417 if (i > 0)
418 dev->_audioframe_count++;
419
420 if (vfs_read_retval < line_size)
421 break;
422 }
423
424 dev->_audiofile_status = (vfs_read_retval == line_size) ?
425 IN_PROGRESS : END_OF_FILE;
426
427 set_fs(old_fs);
428 myfile->f_pos = 0;
429 filp_close(myfile, NULL);
430 }
431
432 return 0;
433 }
434
cx25821_audio_upstream_buffer_prepare(struct cx25821_dev * dev,struct sram_channel * sram_ch,int bpl)435 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
436 struct sram_channel *sram_ch,
437 int bpl)
438 {
439 int ret = 0;
440 dma_addr_t dma_addr;
441 dma_addr_t data_dma_addr;
442
443 cx25821_free_memory_audio(dev);
444
445 dev->_risc_virt_addr = pci_alloc_consistent(dev->pci,
446 dev->audio_upstream_riscbuf_size, &dma_addr);
447 dev->_risc_virt_start_addr = dev->_risc_virt_addr;
448 dev->_risc_phys_start_addr = dma_addr;
449 dev->_risc_phys_addr = dma_addr;
450 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
451
452 if (!dev->_risc_virt_addr) {
453 printk(KERN_DEBUG
454 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
455 return -ENOMEM;
456 }
457 /* Clear out memory at address */
458 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
459
460 /* For Audio Data buffer allocation */
461 dev->_audiodata_buf_virt_addr = pci_alloc_consistent(dev->pci,
462 dev->audio_upstream_databuf_size, &data_dma_addr);
463 dev->_audiodata_buf_phys_addr = data_dma_addr;
464 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
465
466 if (!dev->_audiodata_buf_virt_addr) {
467 printk(KERN_DEBUG
468 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
469 return -ENOMEM;
470 }
471 /* Clear out memory at address */
472 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
473
474 ret = cx25821_openfile_audio(dev, sram_ch);
475 if (ret < 0)
476 return ret;
477
478 /* Creating RISC programs */
479 ret = cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
480 dev->_audio_lines_count);
481 if (ret < 0) {
482 printk(KERN_DEBUG
483 pr_fmt("ERROR creating audio upstream RISC programs!\n"));
484 goto error;
485 }
486
487 return 0;
488
489 error:
490 return ret;
491 }
492
cx25821_audio_upstream_irq(struct cx25821_dev * dev,int chan_num,u32 status)493 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
494 u32 status)
495 {
496 int i = 0;
497 u32 int_msk_tmp;
498 struct sram_channel *channel = dev->channels[chan_num].sram_channels;
499 dma_addr_t risc_phys_jump_addr;
500 __le32 *rp;
501
502 if (status & FLD_AUD_SRC_RISCI1) {
503 /* Get interrupt_index of the program that interrupted */
504 u32 prog_cnt = cx_read(channel->gpcnt);
505
506 /* Since we've identified our IRQ, clear our bits from the
507 * interrupt mask and interrupt status registers */
508 cx_write(channel->int_msk, 0);
509 cx_write(channel->int_stat, cx_read(channel->int_stat));
510
511 spin_lock(&dev->slock);
512
513 while (prog_cnt != dev->_last_index_irq) {
514 /* Update _last_index_irq */
515 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
516 dev->_last_index_irq++;
517 else
518 dev->_last_index_irq = 0;
519
520 dev->_audioframe_index = dev->_last_index_irq;
521
522 queue_work(dev->_irq_audio_queues,
523 &dev->_audio_work_entry);
524 }
525
526 if (dev->_is_first_audio_frame) {
527 dev->_is_first_audio_frame = 0;
528
529 if (dev->_risc_virt_start_addr != NULL) {
530 risc_phys_jump_addr =
531 dev->_risc_phys_start_addr +
532 RISC_SYNC_INSTRUCTION_SIZE +
533 AUDIO_RISC_DMA_BUF_SIZE;
534
535 rp = cx25821_risc_field_upstream_audio(dev,
536 dev->_risc_virt_start_addr + 1,
537 dev->_audiodata_buf_phys_addr,
538 AUDIO_LINE_SIZE, FIFO_DISABLE);
539
540 if (USE_RISC_NOOP_AUDIO) {
541 for (i = 0; i < NUM_NO_OPS; i++) {
542 *(rp++) =
543 cpu_to_le32(RISC_NOOP);
544 }
545 }
546 /* Jump to 2nd Audio Frame */
547 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
548 RISC_CNT_RESET);
549 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
550 *(rp++) = cpu_to_le32(0);
551 }
552 }
553
554 spin_unlock(&dev->slock);
555 } else {
556 if (status & FLD_AUD_SRC_OF)
557 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
558 __func__);
559
560 if (status & FLD_AUD_SRC_SYNC)
561 pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
562 __func__);
563
564 if (status & FLD_AUD_SRC_OPC_ERR)
565 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
566 __func__);
567
568 /* Read and write back the interrupt status register to clear
569 * our bits */
570 cx_write(channel->int_stat, cx_read(channel->int_stat));
571 }
572
573 if (dev->_audiofile_status == END_OF_FILE) {
574 pr_warn("EOF Channel Audio Framecount = %d\n",
575 dev->_audioframe_count);
576 return -1;
577 }
578 /* ElSE, set the interrupt mask register, re-enable irq. */
579 int_msk_tmp = cx_read(channel->int_msk);
580 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
581
582 return 0;
583 }
584
cx25821_upstream_irq_audio(int irq,void * dev_id)585 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
586 {
587 struct cx25821_dev *dev = dev_id;
588 u32 msk_stat, audio_status;
589 int handled = 0;
590 struct sram_channel *sram_ch;
591
592 if (!dev)
593 return -1;
594
595 sram_ch = dev->channels[dev->_audio_upstream_channel].sram_channels;
596
597 msk_stat = cx_read(sram_ch->int_mstat);
598 audio_status = cx_read(sram_ch->int_stat);
599
600 /* Only deal with our interrupt */
601 if (audio_status) {
602 handled = cx25821_audio_upstream_irq(dev,
603 dev->_audio_upstream_channel, audio_status);
604 }
605
606 if (handled < 0)
607 cx25821_stop_upstream_audio(dev);
608 else
609 handled += handled;
610
611 return IRQ_RETVAL(handled);
612 }
613
cx25821_wait_fifo_enable(struct cx25821_dev * dev,struct sram_channel * sram_ch)614 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
615 struct sram_channel *sram_ch)
616 {
617 int count = 0;
618 u32 tmp;
619
620 do {
621 /* Wait 10 microsecond before checking to see if the FIFO is
622 * turned ON. */
623 udelay(10);
624
625 tmp = cx_read(sram_ch->dma_ctl);
626
627 /* 10 millisecond timeout */
628 if (count++ > 1000) {
629 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
630 __func__);
631 return;
632 }
633
634 } while (!(tmp & sram_ch->fld_aud_fifo_en));
635
636 }
637
cx25821_start_audio_dma_upstream(struct cx25821_dev * dev,struct sram_channel * sram_ch)638 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
639 struct sram_channel *sram_ch)
640 {
641 u32 tmp = 0;
642 int err = 0;
643
644 /* Set the physical start address of the RISC program in the initial
645 * program counter(IPC) member of the CMDS. */
646 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
647 /* Risc IPC High 64 bits 63-32 */
648 cx_write(sram_ch->cmds_start + 4, 0);
649
650 /* reset counter */
651 cx_write(sram_ch->gpcnt_ctl, 3);
652
653 /* Set the line length (It looks like we do not need to set the
654 * line length) */
655 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
656
657 /* Set the input mode to 16-bit */
658 tmp = cx_read(sram_ch->aud_cfg);
659 tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
660 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D |
661 FLD_AUD_SONY_MODE;
662 cx_write(sram_ch->aud_cfg, tmp);
663
664 /* Read and write back the interrupt status register to clear it */
665 tmp = cx_read(sram_ch->int_stat);
666 cx_write(sram_ch->int_stat, tmp);
667
668 /* Clear our bits from the interrupt status register. */
669 cx_write(sram_ch->int_stat, _intr_msk);
670
671 /* Set the interrupt mask register, enable irq. */
672 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
673 tmp = cx_read(sram_ch->int_msk);
674 cx_write(sram_ch->int_msk, tmp |= _intr_msk);
675
676 err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
677 IRQF_SHARED, dev->name, dev);
678 if (err < 0) {
679 pr_err("%s: can't get upstream IRQ %d\n", dev->name,
680 dev->pci->irq);
681 goto fail_irq;
682 }
683
684 /* Start the DMA engine */
685 tmp = cx_read(sram_ch->dma_ctl);
686 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
687
688 dev->_audio_is_running = 1;
689 dev->_is_first_audio_frame = 1;
690
691 /* The fifo_en bit turns on by the first Risc program */
692 cx25821_wait_fifo_enable(dev, sram_ch);
693
694 return 0;
695
696 fail_irq:
697 cx25821_dev_unregister(dev);
698 return err;
699 }
700
cx25821_audio_upstream_init(struct cx25821_dev * dev,int channel_select)701 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
702 {
703 struct sram_channel *sram_ch;
704 int retval = 0;
705 int err = 0;
706 int str_length = 0;
707
708 if (dev->_audio_is_running) {
709 pr_warn("Audio Channel is still running so return!\n");
710 return 0;
711 }
712
713 dev->_audio_upstream_channel = channel_select;
714 sram_ch = dev->channels[channel_select].sram_channels;
715
716 /* Work queue */
717 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
718 dev->_irq_audio_queues =
719 create_singlethread_workqueue("cx25821_audioworkqueue");
720
721 if (!dev->_irq_audio_queues) {
722 printk(KERN_DEBUG
723 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
724 return -ENOMEM;
725 }
726
727 dev->_last_index_irq = 0;
728 dev->_audio_is_running = 0;
729 dev->_audioframe_count = 0;
730 dev->_audiofile_status = RESET_STATUS;
731 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
732 _line_size = AUDIO_LINE_SIZE;
733
734 if (dev->input_audiofilename) {
735 str_length = strlen(dev->input_audiofilename);
736 dev->_audiofilename = kmemdup(dev->input_audiofilename,
737 str_length + 1, GFP_KERNEL);
738
739 if (!dev->_audiofilename)
740 goto error;
741
742 /* Default if filename is empty string */
743 if (strcmp(dev->input_audiofilename, "") == 0)
744 dev->_audiofilename = "/root/audioGOOD.wav";
745 } else {
746 str_length = strlen(_defaultAudioName);
747 dev->_audiofilename = kmemdup(_defaultAudioName,
748 str_length + 1, GFP_KERNEL);
749
750 if (!dev->_audiofilename)
751 goto error;
752 }
753
754 retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
755 _line_size, 0);
756
757 dev->audio_upstream_riscbuf_size =
758 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
759 RISC_SYNC_INSTRUCTION_SIZE;
760 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
761
762 /* Allocating buffers and prepare RISC program */
763 retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
764 _line_size);
765 if (retval < 0) {
766 pr_err("%s: Failed to set up Audio upstream buffers!\n",
767 dev->name);
768 goto error;
769 }
770 /* Start RISC engine */
771 cx25821_start_audio_dma_upstream(dev, sram_ch);
772
773 return 0;
774
775 error:
776 cx25821_dev_unregister(dev);
777
778 return err;
779 }
780