[media] cx25821: make cx25821_sram_channels const
[sfrench/cifs-2.6.git] / drivers / media / pci / cx25821 / cx25821-audio-upstream.c
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 static int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
48                                               const 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         const 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 static 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
200 static 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
216 void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
217 {
218         const 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
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
259 static int cx25821_get_audio_data(struct cx25821_dev *dev,
260                            const 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
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
354 static int cx25821_openfile_audio(struct cx25821_dev *dev,
355                            const 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
435 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
436                                                  const 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
493 static 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         const 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
585 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
586 {
587         struct cx25821_dev *dev = dev_id;
588         u32 audio_status;
589         int handled = 0;
590         const 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         audio_status = cx_read(sram_ch->int_stat);
598
599         /* Only deal with our interrupt */
600         if (audio_status) {
601                 handled = cx25821_audio_upstream_irq(dev,
602                                 dev->_audio_upstream_channel, audio_status);
603         }
604
605         if (handled < 0)
606                 cx25821_stop_upstream_audio(dev);
607         else
608                 handled += handled;
609
610         return IRQ_RETVAL(handled);
611 }
612
613 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
614                                      const struct sram_channel *sram_ch)
615 {
616         int count = 0;
617         u32 tmp;
618
619         do {
620                 /* Wait 10 microsecond before checking to see if the FIFO is
621                  * turned ON. */
622                 udelay(10);
623
624                 tmp = cx_read(sram_ch->dma_ctl);
625
626                 /* 10 millisecond timeout */
627                 if (count++ > 1000) {
628                         pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
629                                 __func__);
630                         return;
631                 }
632
633         } while (!(tmp & sram_ch->fld_aud_fifo_en));
634
635 }
636
637 static int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
638                                             const struct sram_channel *sram_ch)
639 {
640         u32 tmp = 0;
641         int err = 0;
642
643         /* Set the physical start address of the RISC program in the initial
644          * program counter(IPC) member of the CMDS. */
645         cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
646         /* Risc IPC High 64 bits 63-32 */
647         cx_write(sram_ch->cmds_start + 4, 0);
648
649         /* reset counter */
650         cx_write(sram_ch->gpcnt_ctl, 3);
651
652         /* Set the line length       (It looks like we do not need to set the
653          * line length) */
654         cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
655
656         /* Set the input mode to 16-bit */
657         tmp = cx_read(sram_ch->aud_cfg);
658         tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
659                 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D |
660                 FLD_AUD_SONY_MODE;
661         cx_write(sram_ch->aud_cfg, tmp);
662
663         /* Read and write back the interrupt status register to clear it */
664         tmp = cx_read(sram_ch->int_stat);
665         cx_write(sram_ch->int_stat, tmp);
666
667         /* Clear our bits from the interrupt status register. */
668         cx_write(sram_ch->int_stat, _intr_msk);
669
670         /* Set the interrupt mask register, enable irq. */
671         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
672         tmp = cx_read(sram_ch->int_msk);
673         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
674
675         err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
676                         IRQF_SHARED, dev->name, dev);
677         if (err < 0) {
678                 pr_err("%s: can't get upstream IRQ %d\n", dev->name,
679                                 dev->pci->irq);
680                 goto fail_irq;
681         }
682
683         /* Start the DMA  engine */
684         tmp = cx_read(sram_ch->dma_ctl);
685         cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
686
687         dev->_audio_is_running = 1;
688         dev->_is_first_audio_frame = 1;
689
690         /* The fifo_en bit turns on by the first Risc program */
691         cx25821_wait_fifo_enable(dev, sram_ch);
692
693         return 0;
694
695 fail_irq:
696         cx25821_dev_unregister(dev);
697         return err;
698 }
699
700 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
701 {
702         const struct sram_channel *sram_ch;
703         int err = 0;
704
705         if (dev->_audio_is_running) {
706                 pr_warn("Audio Channel is still running so return!\n");
707                 return 0;
708         }
709
710         dev->_audio_upstream_channel = channel_select;
711         sram_ch = dev->channels[channel_select].sram_channels;
712
713         /* Work queue */
714         INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
715         dev->_irq_audio_queues =
716             create_singlethread_workqueue("cx25821_audioworkqueue");
717
718         if (!dev->_irq_audio_queues) {
719                 printk(KERN_DEBUG
720                         pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
721                 return -ENOMEM;
722         }
723
724         dev->_last_index_irq = 0;
725         dev->_audio_is_running = 0;
726         dev->_audioframe_count = 0;
727         dev->_audiofile_status = RESET_STATUS;
728         dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
729         _line_size = AUDIO_LINE_SIZE;
730
731         if ((dev->input_audiofilename) &&
732             (strcmp(dev->input_audiofilename, "") != 0))
733                 dev->_audiofilename = kstrdup(dev->input_audiofilename,
734                                               GFP_KERNEL);
735         else
736                 dev->_audiofilename = kstrdup(_defaultAudioName,
737                                               GFP_KERNEL);
738
739         if (!dev->_audiofilename) {
740                 err = -ENOMEM;
741                 goto error;
742         }
743
744         cx25821_sram_channel_setup_upstream_audio(dev, sram_ch,
745                                                   _line_size, 0);
746
747         dev->audio_upstream_riscbuf_size =
748                 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
749                 RISC_SYNC_INSTRUCTION_SIZE;
750         dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
751
752         /* Allocating buffers and prepare RISC program */
753         err = cx25821_audio_upstream_buffer_prepare(dev, sram_ch,
754                                                         _line_size);
755         if (err < 0) {
756                 pr_err("%s: Failed to set up Audio upstream buffers!\n",
757                         dev->name);
758                 goto error;
759         }
760         /* Start RISC engine */
761         cx25821_start_audio_dma_upstream(dev, sram_ch);
762
763         return 0;
764
765 error:
766         cx25821_dev_unregister(dev);
767
768         return err;
769 }