Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
[linux-3.10.git] / drivers / staging / 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 #include "cx25821-video.h"
24 #include "cx25821-audio-upstream.h"
25
26 #include <linux/fs.h>
27 #include <linux/errno.h>
28 #include <linux/kernel.h>
29 #include <linux/init.h>
30 #include <linux/module.h>
31 #include <linux/syscalls.h>
32 #include <linux/file.h>
33 #include <linux/fcntl.h>
34 #include <linux/delay.h>
35 #include <linux/slab.h>
36 #include <linux/uaccess.h>
37
38 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
39 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
40 MODULE_LICENSE("GPL");
41
42 static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
43                         FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
44
45 int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
46                                               struct sram_channel *ch,
47                                               unsigned int bpl, u32 risc)
48 {
49         unsigned int i, lines;
50         u32 cdt;
51
52         if (ch->cmds_start == 0) {
53                 cx_write(ch->ptr1_reg, 0);
54                 cx_write(ch->ptr2_reg, 0);
55                 cx_write(ch->cnt2_reg, 0);
56                 cx_write(ch->cnt1_reg, 0);
57                 return 0;
58         }
59
60         bpl = (bpl + 7) & ~7;   /* alignment */
61         cdt = ch->cdt;
62         lines = ch->fifo_size / bpl;
63
64         if (lines > 3)
65                 lines = 3;
66
67         BUG_ON(lines < 2);
68
69         /* write CDT */
70         for (i = 0; i < lines; i++) {
71                 cx_write(cdt + 16 * i, ch->fifo_start + bpl * i);
72                 cx_write(cdt + 16 * i + 4, 0);
73                 cx_write(cdt + 16 * i + 8, 0);
74                 cx_write(cdt + 16 * i + 12, 0);
75         }
76
77         /* write CMDS */
78         cx_write(ch->cmds_start + 0, risc);
79
80         cx_write(ch->cmds_start + 4, 0);
81         cx_write(ch->cmds_start + 8, cdt);
82         cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW);
83         cx_write(ch->cmds_start + 16, ch->ctrl_start);
84
85         /* IQ size */
86         cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
87
88         for (i = 24; i < 80; i += 4)
89                 cx_write(ch->cmds_start + i, 0);
90
91         /* fill registers */
92         cx_write(ch->ptr1_reg, ch->fifo_start);
93         cx_write(ch->ptr2_reg, cdt);
94         cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW);
95         cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1);
96
97         return 0;
98 }
99
100 static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
101                                                  __le32 *rp,
102                                                  dma_addr_t databuf_phys_addr,
103                                                  unsigned int bpl,
104                                                  int fifo_enable)
105 {
106         unsigned int line;
107         struct sram_channel *sram_ch =
108            dev->channels[dev->_audio_upstream_channel_select].sram_channels;
109         int offset = 0;
110
111         /* scan lines */
112         for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) {
113                 *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl);
114                 *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
115                 *(rp++) = cpu_to_le32(0);       /* bits 63-32 */
116
117                 /* Check if we need to enable the FIFO
118                  * after the first 3 lines.
119                  * For the upstream audio channel,
120                  * the risc engine will enable the FIFO */
121                 if (fifo_enable && line == 2) {
122                         *(rp++) = RISC_WRITECR;
123                         *(rp++) = sram_ch->dma_ctl;
124                         *(rp++) = sram_ch->fld_aud_fifo_en;
125                         *(rp++) = 0x00000020;
126                 }
127
128                 offset += AUDIO_LINE_SIZE;
129         }
130
131         return rp;
132 }
133
134 int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev,
135                                        struct pci_dev *pci,
136                                        unsigned int bpl, unsigned int lines)
137 {
138         __le32 *rp;
139         int fifo_enable = 0;
140         int frame = 0, i = 0;
141         int frame_size = AUDIO_DATA_BUF_SZ;
142         int databuf_offset = 0;
143         int risc_flag = RISC_CNT_INC;
144         dma_addr_t risc_phys_jump_addr;
145
146         /* Virtual address of Risc buffer program */
147         rp = dev->_risc_virt_addr;
148
149         /* sync instruction */
150         *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
151
152         for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) {
153                 databuf_offset = frame_size * frame;
154
155                 if (frame == 0) {
156                         fifo_enable = 1;
157                         risc_flag = RISC_CNT_RESET;
158                 } else {
159                         fifo_enable = 0;
160                         risc_flag = RISC_CNT_INC;
161                 }
162
163                 /* Calculate physical jump address */
164                 if ((frame + 1) == NUM_AUDIO_FRAMES) {
165                         risc_phys_jump_addr =
166                             dev->_risc_phys_start_addr +
167                             RISC_SYNC_INSTRUCTION_SIZE;
168                 } else {
169                         risc_phys_jump_addr =
170                             dev->_risc_phys_start_addr +
171                             RISC_SYNC_INSTRUCTION_SIZE +
172                             AUDIO_RISC_DMA_BUF_SIZE * (frame + 1);
173                 }
174
175                 rp = cx25821_risc_field_upstream_audio(dev, rp,
176                                                        dev->
177                                                        _audiodata_buf_phys_addr
178                                                        + databuf_offset, bpl,
179                                                        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 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         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                     "cx25821: 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         if (dev->_irq_audio_queues) {
246                 kfree(dev->_irq_audio_queues);
247                 dev->_irq_audio_queues = NULL;
248         }
249
250         if (dev->_audiofilename != NULL)
251                 kfree(dev->_audiofilename);
252 }
253
254 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
255 {
256         if (dev->_audio_is_running)
257                 cx25821_stop_upstream_audio(dev);
258
259         cx25821_free_memory_audio(dev);
260 }
261
262 int cx25821_get_audio_data(struct cx25821_dev *dev,
263                            struct sram_channel *sram_ch)
264 {
265         struct file *myfile;
266         int frame_index_temp = dev->_audioframe_index;
267         int i = 0;
268         int line_size = AUDIO_LINE_SIZE;
269         int frame_size = AUDIO_DATA_BUF_SZ;
270         int frame_offset = frame_size * frame_index_temp;
271         ssize_t vfs_read_retval = 0;
272         char mybuf[line_size];
273         loff_t file_offset = dev->_audioframe_count * frame_size;
274         loff_t pos;
275         mm_segment_t old_fs;
276
277         if (dev->_audiofile_status == END_OF_FILE)
278                 return 0;
279
280         myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
281
282         if (IS_ERR(myfile)) {
283                 const int open_errno = -PTR_ERR(myfile);
284                 printk(KERN_ERR "%s(): ERROR opening file(%s) with errno = %d!\n",
285                        __func__, dev->_audiofilename, open_errno);
286                 return PTR_ERR(myfile);
287         } else {
288                 if (!(myfile->f_op)) {
289                         printk(KERN_ERR "%s: File has no file operations registered!\n",
290                                __func__);
291                         filp_close(myfile, NULL);
292                         return -EIO;
293                 }
294
295                 if (!myfile->f_op->read) {
296                         printk(KERN_ERR "%s: File has no READ operations registered!\n",
297                                __func__);
298                         filp_close(myfile, NULL);
299                         return -EIO;
300                 }
301
302                 pos = myfile->f_pos;
303                 old_fs = get_fs();
304                 set_fs(KERNEL_DS);
305
306                 for (i = 0; i < dev->_audio_lines_count; i++) {
307                         pos = file_offset;
308
309                         vfs_read_retval =
310                             vfs_read(myfile, mybuf, line_size, &pos);
311
312                         if (vfs_read_retval > 0 && vfs_read_retval == line_size
313                             && dev->_audiodata_buf_virt_addr != NULL) {
314                                 memcpy((void *)(dev->_audiodata_buf_virt_addr +
315                                                 frame_offset / 4), mybuf,
316                                        vfs_read_retval);
317                         }
318
319                         file_offset += vfs_read_retval;
320                         frame_offset += vfs_read_retval;
321
322                         if (vfs_read_retval < line_size) {
323                                 printk(KERN_INFO
324                                        "Done: exit %s() since no more bytes to read from Audio file.\n",
325                                        __func__);
326                                 break;
327                         }
328                 }
329
330                 if (i > 0)
331                         dev->_audioframe_count++;
332
333                 dev->_audiofile_status =
334                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
335
336                 set_fs(old_fs);
337                 filp_close(myfile, NULL);
338         }
339
340         return 0;
341 }
342
343 static void cx25821_audioups_handler(struct work_struct *work)
344 {
345         struct cx25821_dev *dev =
346             container_of(work, struct cx25821_dev, _audio_work_entry);
347
348         if (!dev) {
349                 printk(KERN_ERR "ERROR %s(): since container_of(work_struct) FAILED!\n",
350                        __func__);
351                 return;
352         }
353
354         cx25821_get_audio_data(dev,
355                               dev->channels[dev->
356                                        _audio_upstream_channel_select].
357                                        sram_channels);
358 }
359
360 int cx25821_openfile_audio(struct cx25821_dev *dev,
361                            struct sram_channel *sram_ch)
362 {
363         struct file *myfile;
364         int i = 0, j = 0;
365         int line_size = AUDIO_LINE_SIZE;
366         ssize_t vfs_read_retval = 0;
367         char mybuf[line_size];
368         loff_t pos;
369         loff_t offset = (unsigned long)0;
370         mm_segment_t old_fs;
371
372         myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
373
374         if (IS_ERR(myfile)) {
375                 const int open_errno = -PTR_ERR(myfile);
376                 printk(KERN_ERR "%s(): ERROR opening file(%s) with errno = %d!\n",
377                        __func__, dev->_audiofilename, open_errno);
378                 return PTR_ERR(myfile);
379         } else {
380                 if (!(myfile->f_op)) {
381                         printk(KERN_ERR "%s: File has no file operations registered!\n",
382                                __func__);
383                         filp_close(myfile, NULL);
384                         return -EIO;
385                 }
386
387                 if (!myfile->f_op->read) {
388                         printk(KERN_ERR "%s: File has no READ operations registered!\n",
389                                __func__);
390                         filp_close(myfile, NULL);
391                         return -EIO;
392                 }
393
394                 pos = myfile->f_pos;
395                 old_fs = get_fs();
396                 set_fs(KERNEL_DS);
397
398                 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
399                         for (i = 0; i < dev->_audio_lines_count; i++) {
400                                 pos = offset;
401
402                                 vfs_read_retval =
403                                     vfs_read(myfile, mybuf, line_size, &pos);
404
405                                 if (vfs_read_retval > 0
406                                     && vfs_read_retval == line_size
407                                     && dev->_audiodata_buf_virt_addr != NULL) {
408                                         memcpy((void *)(dev->
409                                                         _audiodata_buf_virt_addr
410                                                         + offset / 4), mybuf,
411                                                vfs_read_retval);
412                                 }
413
414                                 offset += vfs_read_retval;
415
416                                 if (vfs_read_retval < line_size) {
417                                         printk(KERN_INFO
418                                                "Done: exit %s() since no more bytes to read from Audio file.\n",
419                                                __func__);
420                                         break;
421                                 }
422                         }
423
424                         if (i > 0)
425                                 dev->_audioframe_count++;
426
427                         if (vfs_read_retval < line_size)
428                                 break;
429                 }
430
431                 dev->_audiofile_status =
432                     (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
433
434                 set_fs(old_fs);
435                 myfile->f_pos = 0;
436                 filp_close(myfile, NULL);
437         }
438
439         return 0;
440 }
441
442 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
443                                                  struct sram_channel *sram_ch,
444                                                  int bpl)
445 {
446         int ret = 0;
447         dma_addr_t dma_addr;
448         dma_addr_t data_dma_addr;
449
450         cx25821_free_memory_audio(dev);
451
452         dev->_risc_virt_addr =
453             pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
454                                  &dma_addr);
455         dev->_risc_virt_start_addr = dev->_risc_virt_addr;
456         dev->_risc_phys_start_addr = dma_addr;
457         dev->_risc_phys_addr = dma_addr;
458         dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
459
460         if (!dev->_risc_virt_addr) {
461                 printk(KERN_DEBUG
462                         "cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning.\n");
463                 return -ENOMEM;
464         }
465         /* Clear out memory at address */
466         memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
467
468         /* For Audio Data buffer allocation */
469         dev->_audiodata_buf_virt_addr =
470             pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
471                                  &data_dma_addr);
472         dev->_audiodata_buf_phys_addr = data_dma_addr;
473         dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
474
475         if (!dev->_audiodata_buf_virt_addr) {
476                 printk(KERN_DEBUG
477                         "cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning.\n");
478                 return -ENOMEM;
479         }
480         /* Clear out memory at address */
481         memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
482
483         ret = cx25821_openfile_audio(dev, sram_ch);
484         if (ret < 0)
485                 return ret;
486
487         /* Creating RISC programs */
488         ret =
489             cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
490                                                dev->_audio_lines_count);
491         if (ret < 0) {
492                 printk(KERN_DEBUG
493                       "cx25821 ERROR creating audio upstream RISC programs!\n");
494                 goto error;
495         }
496
497         return 0;
498
499 error:
500         return ret;
501 }
502
503 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
504                                u32 status)
505 {
506         int i = 0;
507         u32 int_msk_tmp;
508         struct sram_channel *channel = dev->channels[chan_num].sram_channels;
509         dma_addr_t risc_phys_jump_addr;
510         __le32 *rp;
511
512         if (status & FLD_AUD_SRC_RISCI1) {
513                 /* Get interrupt_index of the program that interrupted */
514                 u32 prog_cnt = cx_read(channel->gpcnt);
515
516                 /* Since we've identified our IRQ, clear our bits from the
517                  * interrupt mask and interrupt status registers */
518                 cx_write(channel->int_msk, 0);
519                 cx_write(channel->int_stat, cx_read(channel->int_stat));
520
521                 spin_lock(&dev->slock);
522
523                 while (prog_cnt != dev->_last_index_irq) {
524                         /* Update _last_index_irq */
525                         if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
526                                 dev->_last_index_irq++;
527                         else
528                                 dev->_last_index_irq = 0;
529
530                         dev->_audioframe_index = dev->_last_index_irq;
531
532                         queue_work(dev->_irq_audio_queues,
533                                    &dev->_audio_work_entry);
534                 }
535
536                 if (dev->_is_first_audio_frame) {
537                         dev->_is_first_audio_frame = 0;
538
539                         if (dev->_risc_virt_start_addr != NULL) {
540                                 risc_phys_jump_addr =
541                                     dev->_risc_phys_start_addr +
542                                     RISC_SYNC_INSTRUCTION_SIZE +
543                                     AUDIO_RISC_DMA_BUF_SIZE;
544
545                                 rp = cx25821_risc_field_upstream_audio(dev,
546                                                                        dev->
547                                                                        _risc_virt_start_addr
548                                                                        + 1,
549                                                                        dev->
550                                                                        _audiodata_buf_phys_addr,
551                                                                        AUDIO_LINE_SIZE,
552                                                                        FIFO_DISABLE);
553
554                                 if (USE_RISC_NOOP_AUDIO) {
555                                         for (i = 0; i < NUM_NO_OPS; i++) {
556                                                 *(rp++) =
557                                                     cpu_to_le32(RISC_NOOP);
558                                         }
559                                 }
560                                 /* Jump to 2nd Audio Frame */
561                                 *(rp++) =
562                                     cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
563                                                 RISC_CNT_RESET);
564                                 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
565                                 *(rp++) = cpu_to_le32(0);
566                         }
567                 }
568
569                 spin_unlock(&dev->slock);
570         } else {
571                 if (status & FLD_AUD_SRC_OF)
572                         printk(KERN_WARNING "%s: Audio Received Overflow Error Interrupt!\n",
573                                __func__);
574
575                 if (status & FLD_AUD_SRC_SYNC)
576                         printk(KERN_WARNING "%s: Audio Received Sync Error Interrupt!\n",
577                                __func__);
578
579                 if (status & FLD_AUD_SRC_OPC_ERR)
580                         printk(KERN_WARNING "%s: Audio Received OpCode Error Interrupt!\n",
581                                __func__);
582
583                 /* Read and write back the interrupt status register to clear
584                  * our bits */
585                 cx_write(channel->int_stat, cx_read(channel->int_stat));
586         }
587
588         if (dev->_audiofile_status == END_OF_FILE) {
589                 printk(KERN_WARNING "cx25821: EOF Channel Audio Framecount = %d\n",
590                        dev->_audioframe_count);
591                 return -1;
592         }
593         /* ElSE, set the interrupt mask register, re-enable irq. */
594         int_msk_tmp = cx_read(channel->int_msk);
595         cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
596
597         return 0;
598 }
599
600 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
601 {
602         struct cx25821_dev *dev = dev_id;
603         u32 msk_stat, audio_status;
604         int handled = 0;
605         struct sram_channel *sram_ch;
606
607         if (!dev)
608                 return -1;
609
610         sram_ch = dev->channels[dev->_audio_upstream_channel_select].sram_channels;
611
612         msk_stat = cx_read(sram_ch->int_mstat);
613         audio_status = cx_read(sram_ch->int_stat);
614
615         /* Only deal with our interrupt */
616         if (audio_status) {
617                 handled =
618                     cx25821_audio_upstream_irq(dev,
619                                                dev->
620                                                _audio_upstream_channel_select,
621                                                audio_status);
622         }
623
624         if (handled < 0)
625                 cx25821_stop_upstream_audio(dev);
626         else
627                 handled += handled;
628
629         return IRQ_RETVAL(handled);
630 }
631
632 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
633                                      struct sram_channel *sram_ch)
634 {
635         int count = 0;
636         u32 tmp;
637
638         do {
639                 /* Wait 10 microsecond before checking to see if the FIFO is
640                  * turned ON. */
641                 udelay(10);
642
643                 tmp = cx_read(sram_ch->dma_ctl);
644
645                 /* 10 millisecond timeout */
646                 if (count++ > 1000) {
647                         printk(KERN_ERR
648                                "cx25821 ERROR: %s() fifo is NOT turned on. Timeout!\n",
649                              __func__);
650                         return;
651                 }
652
653         } while (!(tmp & sram_ch->fld_aud_fifo_en));
654
655 }
656
657 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
658                                      struct sram_channel *sram_ch)
659 {
660         u32 tmp = 0;
661         int err = 0;
662
663         /* Set the physical start address of the RISC program in the initial
664          * program counter(IPC) member of the CMDS. */
665         cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
666         /* Risc IPC High 64 bits 63-32 */
667         cx_write(sram_ch->cmds_start + 4, 0);
668
669         /* reset counter */
670         cx_write(sram_ch->gpcnt_ctl, 3);
671
672         /* Set the line length       (It looks like we do not need to set the
673          * line length) */
674         cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
675
676         /* Set the input mode to 16-bit */
677         tmp = cx_read(sram_ch->aud_cfg);
678         tmp |=
679             FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
680             FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
681         cx_write(sram_ch->aud_cfg, tmp);
682
683         /* Read and write back the interrupt status register to clear it */
684         tmp = cx_read(sram_ch->int_stat);
685         cx_write(sram_ch->int_stat, tmp);
686
687         /* Clear our bits from the interrupt status register. */
688         cx_write(sram_ch->int_stat, _intr_msk);
689
690         /* Set the interrupt mask register, enable irq. */
691         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
692         tmp = cx_read(sram_ch->int_msk);
693         cx_write(sram_ch->int_msk, tmp |= _intr_msk);
694
695         err =
696             request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
697                         IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
698         if (err < 0) {
699                 printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name,
700                        dev->pci->irq);
701                 goto fail_irq;
702         }
703
704         /* Start the DMA  engine */
705         tmp = cx_read(sram_ch->dma_ctl);
706         cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
707
708         dev->_audio_is_running = 1;
709         dev->_is_first_audio_frame = 1;
710
711         /* The fifo_en bit turns on by the first Risc program */
712         cx25821_wait_fifo_enable(dev, sram_ch);
713
714         return 0;
715
716 fail_irq:
717         cx25821_dev_unregister(dev);
718         return err;
719 }
720
721 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
722 {
723         struct sram_channel *sram_ch;
724         int retval = 0;
725         int err = 0;
726         int str_length = 0;
727
728         if (dev->_audio_is_running) {
729                 printk(KERN_WARNING "Audio Channel is still running so return!\n");
730                 return 0;
731         }
732
733         dev->_audio_upstream_channel_select = channel_select;
734         sram_ch = dev->channels[channel_select].sram_channels;
735
736         /* Work queue */
737         INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
738         dev->_irq_audio_queues =
739             create_singlethread_workqueue("cx25821_audioworkqueue");
740
741         if (!dev->_irq_audio_queues) {
742                 printk(KERN_DEBUG
743                         "cx25821 ERROR: create_singlethread_workqueue() for Audio FAILED!\n");
744                 return -ENOMEM;
745         }
746
747         dev->_last_index_irq = 0;
748         dev->_audio_is_running = 0;
749         dev->_audioframe_count = 0;
750         dev->_audiofile_status = RESET_STATUS;
751         dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
752         _line_size = AUDIO_LINE_SIZE;
753
754         if (dev->input_audiofilename) {
755                 str_length = strlen(dev->input_audiofilename);
756                 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
757
758                 if (!dev->_audiofilename)
759                         goto error;
760
761                 memcpy(dev->_audiofilename, dev->input_audiofilename,
762                        str_length + 1);
763
764                 /* Default if filename is empty string */
765                 if (strcmp(dev->input_audiofilename, "") == 0)
766                         dev->_audiofilename = "/root/audioGOOD.wav";
767         } else {
768                 str_length = strlen(_defaultAudioName);
769                 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
770
771                 if (!dev->_audiofilename)
772                         goto error;
773
774                 memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
775         }
776
777         retval =
778             cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size,
779                                                       0);
780
781         dev->audio_upstream_riscbuf_size =
782             AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
783             RISC_SYNC_INSTRUCTION_SIZE;
784         dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
785
786         /* Allocating buffers and prepare RISC program */
787         retval =
788             cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size);
789         if (retval < 0) {
790                 printk(KERN_ERR
791                        "%s: Failed to set up Audio upstream buffers!\n",
792                        dev->name);
793                 goto error;
794         }
795         /* Start RISC engine */
796         cx25821_start_audio_dma_upstream(dev, sram_ch);
797
798         return 0;
799
800 error:
801         cx25821_dev_unregister(dev);
802
803         return err;
804 }