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1a9fc855 MCC |
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> | |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1a9fc855 MCC |
36 | #include <asm/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 = | |
43 | FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF | FLD_AUD_SRC_SYNC | | |
44 | FLD_AUD_SRC_OPC_ERR; | |
45 | ||
46 | int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev, | |
47 | struct sram_channel *ch, | |
48 | unsigned int bpl, u32 risc) | |
49 | { | |
50 | unsigned int i, lines; | |
51 | u32 cdt; | |
52 | ||
53 | if (ch->cmds_start == 0) { | |
54 | cx_write(ch->ptr1_reg, 0); | |
55 | cx_write(ch->ptr2_reg, 0); | |
56 | cx_write(ch->cnt2_reg, 0); | |
57 | cx_write(ch->cnt1_reg, 0); | |
58 | return 0; | |
59 | } | |
60 | ||
61 | bpl = (bpl + 7) & ~7; /* alignment */ | |
62 | cdt = ch->cdt; | |
63 | lines = ch->fifo_size / bpl; | |
64 | ||
65 | if (lines > 3) { | |
66 | lines = 3; | |
67 | } | |
68 | ||
69 | BUG_ON(lines < 2); | |
70 | ||
71 | /* write CDT */ | |
72 | for (i = 0; i < lines; i++) { | |
73 | cx_write(cdt + 16 * i, ch->fifo_start + bpl * i); | |
74 | cx_write(cdt + 16 * i + 4, 0); | |
75 | cx_write(cdt + 16 * i + 8, 0); | |
76 | cx_write(cdt + 16 * i + 12, 0); | |
77 | } | |
78 | ||
79 | /* write CMDS */ | |
80 | cx_write(ch->cmds_start + 0, risc); | |
81 | ||
82 | cx_write(ch->cmds_start + 4, 0); | |
83 | cx_write(ch->cmds_start + 8, cdt); | |
84 | cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW); | |
85 | cx_write(ch->cmds_start + 16, ch->ctrl_start); | |
86 | ||
87 | //IQ size | |
88 | cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW); | |
89 | ||
90 | for (i = 24; i < 80; i += 4) | |
91 | cx_write(ch->cmds_start + i, 0); | |
92 | ||
93 | /* fill registers */ | |
94 | cx_write(ch->ptr1_reg, ch->fifo_start); | |
95 | cx_write(ch->ptr2_reg, cdt); | |
96 | cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW); | |
97 | cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev, | |
103 | __le32 * rp, | |
104 | dma_addr_t databuf_phys_addr, | |
105 | unsigned int bpl, | |
106 | int fifo_enable) | |
107 | { | |
108 | unsigned int line; | |
109 | struct sram_channel *sram_ch = | |
110 | &dev->sram_channels[dev->_audio_upstream_channel_select]; | |
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 after the first 3 lines | |
120 | // For the upstream audio channel, 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 | ||
187 | // Loop to (Nth)FrameRISC or to Start of Risc program & 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->sram_channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B]; | |
220 | u32 tmp = 0; | |
221 | ||
222 | if (!dev->_audio_is_running) { | |
223 | printk | |
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 | ||
260 | cx25821_free_memory_audio(dev); | |
261 | } | |
262 | ||
263 | int cx25821_get_audio_data(struct cx25821_dev *dev, | |
264 | struct sram_channel *sram_ch) | |
265 | { | |
266 | struct file *myfile; | |
267 | int frame_index_temp = dev->_audioframe_index; | |
268 | int i = 0; | |
269 | int line_size = AUDIO_LINE_SIZE; | |
270 | int frame_size = AUDIO_DATA_BUF_SZ; | |
271 | int frame_offset = frame_size * frame_index_temp; | |
272 | ssize_t vfs_read_retval = 0; | |
273 | char mybuf[line_size]; | |
274 | loff_t file_offset = dev->_audioframe_count * frame_size; | |
275 | loff_t pos; | |
276 | mm_segment_t old_fs; | |
277 | ||
278 | if (dev->_audiofile_status == END_OF_FILE) | |
279 | return 0; | |
280 | ||
281 | myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); | |
282 | ||
283 | if (IS_ERR(myfile)) { | |
284 | const int open_errno = -PTR_ERR(myfile); | |
285 | printk("%s(): ERROR opening file(%s) with errno = %d! \n", | |
286 | __func__, dev->_audiofilename, open_errno); | |
287 | return PTR_ERR(myfile); | |
288 | } else { | |
289 | if (!(myfile->f_op)) { | |
290 | printk("%s: File has no file operations registered!\n", | |
291 | __func__); | |
292 | filp_close(myfile, NULL); | |
293 | return -EIO; | |
294 | } | |
295 | ||
296 | if (!myfile->f_op->read) { | |
297 | printk("%s: File has no READ operations registered! \n", | |
298 | __func__); | |
299 | filp_close(myfile, NULL); | |
300 | return -EIO; | |
301 | } | |
302 | ||
303 | pos = myfile->f_pos; | |
304 | old_fs = get_fs(); | |
305 | set_fs(KERNEL_DS); | |
306 | ||
307 | for (i = 0; i < dev->_audio_lines_count; i++) { | |
308 | pos = file_offset; | |
309 | ||
310 | vfs_read_retval = | |
311 | vfs_read(myfile, mybuf, line_size, &pos); | |
312 | ||
313 | if (vfs_read_retval > 0 && vfs_read_retval == line_size | |
314 | && dev->_audiodata_buf_virt_addr != NULL) { | |
315 | memcpy((void *)(dev->_audiodata_buf_virt_addr + | |
316 | frame_offset / 4), mybuf, | |
317 | vfs_read_retval); | |
318 | } | |
319 | ||
320 | file_offset += vfs_read_retval; | |
321 | frame_offset += vfs_read_retval; | |
322 | ||
323 | if (vfs_read_retval < line_size) { | |
324 | printk(KERN_INFO | |
325 | "Done: exit %s() since no more bytes to read from Audio file.\n", | |
326 | __func__); | |
327 | break; | |
328 | } | |
329 | } | |
330 | ||
331 | if (i > 0) | |
332 | dev->_audioframe_count++; | |
333 | ||
334 | dev->_audiofile_status = | |
335 | (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE; | |
336 | ||
337 | set_fs(old_fs); | |
338 | filp_close(myfile, NULL); | |
339 | } | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | static void cx25821_audioups_handler(struct work_struct *work) | |
345 | { | |
346 | struct cx25821_dev *dev = | |
347 | container_of(work, struct cx25821_dev, _audio_work_entry); | |
348 | ||
349 | if (!dev) { | |
350 | printk("ERROR %s(): since container_of(work_struct) FAILED! \n", | |
351 | __func__); | |
352 | return; | |
353 | } | |
354 | ||
355 | cx25821_get_audio_data(dev, | |
356 | &dev->sram_channels[dev-> | |
357 | _audio_upstream_channel_select]); | |
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("%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("%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("%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 | ||
428 | if (vfs_read_retval < line_size) { | |
429 | break; | |
430 | } | |
431 | } | |
432 | ||
433 | dev->_audiofile_status = | |
434 | (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE; | |
435 | ||
436 | set_fs(old_fs); | |
437 | myfile->f_pos = 0; | |
438 | filp_close(myfile, NULL); | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev, | |
445 | struct sram_channel *sram_ch, | |
446 | int bpl) | |
447 | { | |
448 | int ret = 0; | |
449 | dma_addr_t dma_addr; | |
450 | dma_addr_t data_dma_addr; | |
451 | ||
452 | cx25821_free_memory_audio(dev); | |
453 | ||
454 | dev->_risc_virt_addr = | |
455 | pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size, | |
456 | &dma_addr); | |
457 | dev->_risc_virt_start_addr = dev->_risc_virt_addr; | |
458 | dev->_risc_phys_start_addr = dma_addr; | |
459 | dev->_risc_phys_addr = dma_addr; | |
460 | dev->_audiorisc_size = dev->audio_upstream_riscbuf_size; | |
461 | ||
462 | if (!dev->_risc_virt_addr) { | |
463 | printk | |
464 | ("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning.\n"); | |
465 | return -ENOMEM; | |
466 | } | |
467 | //Clear out memory at address | |
468 | memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size); | |
469 | ||
470 | //For Audio Data buffer allocation | |
471 | dev->_audiodata_buf_virt_addr = | |
472 | pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size, | |
473 | &data_dma_addr); | |
474 | dev->_audiodata_buf_phys_addr = data_dma_addr; | |
475 | dev->_audiodata_buf_size = dev->audio_upstream_databuf_size; | |
476 | ||
477 | if (!dev->_audiodata_buf_virt_addr) { | |
478 | printk | |
479 | ("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning. \n"); | |
480 | return -ENOMEM; | |
481 | } | |
482 | //Clear out memory at address | |
483 | memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size); | |
484 | ||
485 | ret = cx25821_openfile_audio(dev, sram_ch); | |
486 | if (ret < 0) | |
487 | return ret; | |
488 | ||
489 | //Creating RISC programs | |
490 | ret = | |
491 | cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl, | |
492 | dev->_audio_lines_count); | |
493 | if (ret < 0) { | |
494 | printk(KERN_DEBUG | |
495 | "cx25821 ERROR creating audio upstream RISC programs! \n"); | |
496 | goto error; | |
497 | } | |
498 | ||
499 | return 0; | |
500 | ||
501 | error: | |
502 | return ret; | |
503 | } | |
504 | ||
505 | int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num, | |
506 | u32 status) | |
507 | { | |
508 | int i = 0; | |
509 | u32 int_msk_tmp; | |
510 | struct sram_channel *channel = &dev->sram_channels[chan_num]; | |
511 | dma_addr_t risc_phys_jump_addr; | |
512 | __le32 *rp; | |
513 | ||
514 | if (status & FLD_AUD_SRC_RISCI1) { | |
515 | //Get interrupt_index of the program that interrupted | |
516 | u32 prog_cnt = cx_read(channel->gpcnt); | |
517 | ||
518 | //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers | |
519 | cx_write(channel->int_msk, 0); | |
520 | cx_write(channel->int_stat, cx_read(channel->int_stat)); | |
521 | ||
522 | spin_lock(&dev->slock); | |
523 | ||
524 | while (prog_cnt != dev->_last_index_irq) { | |
525 | //Update _last_index_irq | |
526 | if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1)) { | |
527 | dev->_last_index_irq++; | |
528 | } else { | |
529 | dev->_last_index_irq = 0; | |
530 | } | |
531 | ||
532 | dev->_audioframe_index = dev->_last_index_irq; | |
533 | ||
534 | queue_work(dev->_irq_audio_queues, | |
535 | &dev->_audio_work_entry); | |
536 | } | |
537 | ||
538 | if (dev->_is_first_audio_frame) { | |
539 | dev->_is_first_audio_frame = 0; | |
540 | ||
541 | if (dev->_risc_virt_start_addr != NULL) { | |
542 | risc_phys_jump_addr = | |
543 | dev->_risc_phys_start_addr + | |
544 | RISC_SYNC_INSTRUCTION_SIZE + | |
545 | AUDIO_RISC_DMA_BUF_SIZE; | |
546 | ||
547 | rp = cx25821_risc_field_upstream_audio(dev, | |
548 | dev-> | |
549 | _risc_virt_start_addr | |
550 | + 1, | |
551 | dev-> | |
552 | _audiodata_buf_phys_addr, | |
553 | AUDIO_LINE_SIZE, | |
554 | FIFO_DISABLE); | |
555 | ||
556 | if (USE_RISC_NOOP_AUDIO) { | |
557 | for (i = 0; i < NUM_NO_OPS; i++) { | |
558 | *(rp++) = | |
559 | cpu_to_le32(RISC_NOOP); | |
560 | } | |
561 | } | |
562 | // Jump to 2nd Audio Frame | |
563 | *(rp++) = | |
564 | cpu_to_le32(RISC_JUMP | RISC_IRQ1 | | |
565 | RISC_CNT_RESET); | |
566 | *(rp++) = cpu_to_le32(risc_phys_jump_addr); | |
567 | *(rp++) = cpu_to_le32(0); | |
568 | } | |
569 | } | |
570 | ||
571 | spin_unlock(&dev->slock); | |
572 | } else { | |
573 | if (status & FLD_AUD_SRC_OF) | |
574 | printk("%s: Audio Received Overflow Error Interrupt!\n", | |
575 | __func__); | |
576 | ||
577 | if (status & FLD_AUD_SRC_SYNC) | |
578 | printk("%s: Audio Received Sync Error Interrupt!\n", | |
579 | __func__); | |
580 | ||
581 | if (status & FLD_AUD_SRC_OPC_ERR) | |
582 | printk("%s: Audio Received OpCode Error Interrupt!\n", | |
583 | __func__); | |
584 | ||
585 | // Read and write back the interrupt status register to clear our bits | |
586 | cx_write(channel->int_stat, cx_read(channel->int_stat)); | |
587 | } | |
588 | ||
589 | if (dev->_audiofile_status == END_OF_FILE) { | |
590 | printk("cx25821: EOF Channel Audio Framecount = %d\n", | |
591 | dev->_audioframe_count); | |
592 | return -1; | |
593 | } | |
594 | //ElSE, set the interrupt mask register, re-enable irq. | |
595 | int_msk_tmp = cx_read(channel->int_msk); | |
596 | cx_write(channel->int_msk, int_msk_tmp |= _intr_msk); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id) | |
602 | { | |
603 | struct cx25821_dev *dev = dev_id; | |
604 | u32 msk_stat, audio_status; | |
605 | int handled = 0; | |
606 | struct sram_channel *sram_ch; | |
607 | ||
608 | if (!dev) | |
609 | return -1; | |
610 | ||
611 | sram_ch = &dev->sram_channels[dev->_audio_upstream_channel_select]; | |
612 | ||
613 | msk_stat = cx_read(sram_ch->int_mstat); | |
614 | audio_status = cx_read(sram_ch->int_stat); | |
615 | ||
616 | // Only deal with our interrupt | |
617 | if (audio_status) { | |
618 | handled = | |
619 | cx25821_audio_upstream_irq(dev, | |
620 | dev-> | |
621 | _audio_upstream_channel_select, | |
622 | audio_status); | |
623 | } | |
624 | ||
625 | if (handled < 0) { | |
626 | cx25821_stop_upstream_audio(dev); | |
627 | } else { | |
628 | handled += handled; | |
629 | } | |
630 | ||
631 | return IRQ_RETVAL(handled); | |
632 | } | |
633 | ||
634 | static void cx25821_wait_fifo_enable(struct cx25821_dev *dev, | |
635 | struct sram_channel *sram_ch) | |
636 | { | |
637 | int count = 0; | |
638 | u32 tmp; | |
639 | ||
640 | do { | |
641 | //Wait 10 microsecond before checking to see if the FIFO is turned ON. | |
642 | udelay(10); | |
643 | ||
644 | tmp = cx_read(sram_ch->dma_ctl); | |
645 | ||
646 | if (count++ > 1000) //10 millisecond timeout | |
647 | { | |
648 | printk | |
649 | ("cx25821 ERROR: %s() fifo is NOT turned on. Timeout!\n", | |
650 | __func__); | |
651 | return; | |
652 | } | |
653 | ||
654 | } while (!(tmp & sram_ch->fld_aud_fifo_en)); | |
655 | ||
656 | } | |
657 | ||
658 | int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev, | |
659 | struct sram_channel *sram_ch) | |
660 | { | |
661 | u32 tmp = 0; | |
662 | int err = 0; | |
663 | ||
664 | // Set the physical start address of the RISC program in the initial program counter(IPC) member of the CMDS. | |
665 | cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr); | |
666 | cx_write(sram_ch->cmds_start + 4, 0); /* Risc IPC High 64 bits 63-32 */ | |
667 | ||
668 | /* reset counter */ | |
669 | cx_write(sram_ch->gpcnt_ctl, 3); | |
670 | ||
671 | //Set the line length (It looks like we do not need to set the line length) | |
672 | cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH); | |
673 | ||
674 | //Set the input mode to 16-bit | |
675 | tmp = cx_read(sram_ch->aud_cfg); | |
676 | tmp |= | |
677 | FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE | | |
678 | FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE; | |
679 | cx_write(sram_ch->aud_cfg, tmp); | |
680 | ||
681 | // Read and write back the interrupt status register to clear it | |
682 | tmp = cx_read(sram_ch->int_stat); | |
683 | cx_write(sram_ch->int_stat, tmp); | |
684 | ||
685 | // Clear our bits from the interrupt status register. | |
686 | cx_write(sram_ch->int_stat, _intr_msk); | |
687 | ||
688 | //Set the interrupt mask register, enable irq. | |
689 | cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit)); | |
690 | tmp = cx_read(sram_ch->int_msk); | |
691 | cx_write(sram_ch->int_msk, tmp |= _intr_msk); | |
692 | ||
693 | err = | |
694 | request_irq(dev->pci->irq, cx25821_upstream_irq_audio, | |
695 | IRQF_SHARED | IRQF_DISABLED, dev->name, dev); | |
696 | if (err < 0) { | |
697 | printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name, | |
698 | dev->pci->irq); | |
699 | goto fail_irq; | |
700 | } | |
701 | ||
702 | // Start the DMA engine | |
703 | tmp = cx_read(sram_ch->dma_ctl); | |
704 | cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en); | |
705 | ||
706 | dev->_audio_is_running = 1; | |
707 | dev->_is_first_audio_frame = 1; | |
708 | ||
709 | // The fifo_en bit turns on by the first Risc program | |
710 | cx25821_wait_fifo_enable(dev, sram_ch); | |
711 | ||
712 | return 0; | |
713 | ||
714 | fail_irq: | |
715 | cx25821_dev_unregister(dev); | |
716 | return err; | |
717 | } | |
718 | ||
719 | int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select) | |
720 | { | |
721 | struct sram_channel *sram_ch; | |
722 | int retval = 0; | |
723 | int err = 0; | |
724 | int str_length = 0; | |
725 | ||
726 | if (dev->_audio_is_running) { | |
727 | printk("Audio Channel is still running so return!\n"); | |
728 | return 0; | |
729 | } | |
730 | ||
731 | dev->_audio_upstream_channel_select = channel_select; | |
732 | sram_ch = &dev->sram_channels[channel_select]; | |
733 | ||
734 | //Work queue | |
735 | INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler); | |
736 | dev->_irq_audio_queues = | |
737 | create_singlethread_workqueue("cx25821_audioworkqueue"); | |
738 | ||
739 | if (!dev->_irq_audio_queues) { | |
740 | printk | |
741 | ("cx25821 ERROR: create_singlethread_workqueue() for Audio FAILED!\n"); | |
742 | return -ENOMEM; | |
743 | } | |
744 | ||
745 | dev->_last_index_irq = 0; | |
746 | dev->_audio_is_running = 0; | |
747 | dev->_audioframe_count = 0; | |
748 | dev->_audiofile_status = RESET_STATUS; | |
749 | dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER; | |
750 | _line_size = AUDIO_LINE_SIZE; | |
751 | ||
752 | if (dev->input_audiofilename) { | |
753 | str_length = strlen(dev->input_audiofilename); | |
754 | dev->_audiofilename = | |
755 | (char *)kmalloc(str_length + 1, GFP_KERNEL); | |
756 | ||
757 | if (!dev->_audiofilename) | |
758 | goto error; | |
759 | ||
760 | memcpy(dev->_audiofilename, dev->input_audiofilename, | |
761 | str_length + 1); | |
762 | ||
763 | //Default if filename is empty string | |
764 | if (strcmp(dev->input_audiofilename, "") == 0) { | |
765 | dev->_audiofilename = "/root/audioGOOD.wav"; | |
766 | } | |
767 | } else { | |
768 | str_length = strlen(_defaultAudioName); | |
769 | dev->_audiofilename = | |
770 | (char *)kmalloc(str_length + 1, GFP_KERNEL); | |
771 | ||
772 | if (!dev->_audiofilename) | |
773 | goto error; | |
774 | ||
775 | memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1); | |
776 | } | |
777 | ||
778 | retval = | |
779 | cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size, | |
780 | 0); | |
781 | ||
782 | dev->audio_upstream_riscbuf_size = | |
783 | AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS + | |
784 | RISC_SYNC_INSTRUCTION_SIZE; | |
785 | dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS; | |
786 | ||
787 | //Allocating buffers and prepare RISC program | |
788 | retval = | |
789 | cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size); | |
790 | if (retval < 0) { | |
791 | printk(KERN_ERR | |
792 | "%s: Failed to set up Audio upstream buffers!\n", | |
793 | dev->name); | |
794 | goto error; | |
795 | } | |
796 | //Start RISC engine | |
797 | cx25821_start_audio_dma_upstream(dev, sram_ch); | |
798 | ||
799 | return 0; | |
800 | ||
801 | error: | |
802 | cx25821_dev_unregister(dev); | |
803 | ||
804 | return err; | |
805 | } |