2 * Driver for the Conexant CX25821 PCIe bridge
4 * Copyright (C) 2009 Conexant Systems Inc.
5 * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com>
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.
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
16 * GNU General Public License for more details.
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.
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include "cx25821-video.h"
26 #include "cx25821-audio-upstream.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>
40 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
41 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
42 MODULE_LICENSE("GPL");
44 static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF |
45 FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
47 int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
48 struct sram_channel *ch,
49 unsigned int bpl, u32 risc)
51 unsigned int i, lines;
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);
62 bpl = (bpl + 7) & ~7; /* alignment */
64 lines = ch->fifo_size / bpl;
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);
80 cx_write(ch->cmds_start + 0, risc);
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);
88 cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
90 for (i = 24; i < 80; i += 4)
91 cx_write(ch->cmds_start + i, 0);
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);
102 static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev,
104 dma_addr_t databuf_phys_addr,
109 struct sram_channel *sram_ch =
110 dev->channels[dev->_audio_upstream_channel_select].sram_channels;
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 */
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;
130 offset += AUDIO_LINE_SIZE;
136 int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev,
138 unsigned int bpl, unsigned int lines)
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;
148 /* Virtual address of Risc buffer program */
149 rp = dev->_risc_virt_addr;
151 /* sync instruction */
152 *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
154 for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) {
155 databuf_offset = frame_size * frame;
159 risc_flag = RISC_CNT_RESET;
162 risc_flag = RISC_CNT_INC;
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;
171 risc_phys_jump_addr =
172 dev->_risc_phys_start_addr +
173 RISC_SYNC_INSTRUCTION_SIZE +
174 AUDIO_RISC_DMA_BUF_SIZE * (frame + 1);
177 rp = cx25821_risc_field_upstream_audio(dev, rp,
179 _audiodata_buf_phys_addr
180 + databuf_offset, bpl,
183 if (USE_RISC_NOOP_AUDIO) {
184 for (i = 0; i < NUM_NO_OPS; i++)
185 *(rp++) = cpu_to_le32(RISC_NOOP);
188 /* Loop to (Nth)FrameRISC or to Start of Risc program &
190 *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag);
191 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
192 *(rp++) = cpu_to_le32(0);
194 /* Recalculate virtual address based on frame index */
195 rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 +
196 (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4);
202 void cx25821_free_memory_audio(struct cx25821_dev *dev)
204 if (dev->_risc_virt_addr) {
205 pci_free_consistent(dev->pci, dev->_audiorisc_size,
206 dev->_risc_virt_addr, dev->_risc_phys_addr);
207 dev->_risc_virt_addr = NULL;
210 if (dev->_audiodata_buf_virt_addr) {
211 pci_free_consistent(dev->pci, dev->_audiodata_buf_size,
212 dev->_audiodata_buf_virt_addr,
213 dev->_audiodata_buf_phys_addr);
214 dev->_audiodata_buf_virt_addr = NULL;
218 void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
220 struct sram_channel *sram_ch =
221 dev->channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B].sram_channels;
224 if (!dev->_audio_is_running) {
226 pr_fmt("No audio file is currently running so return!\n"));
229 /* Disable RISC interrupts */
230 cx_write(sram_ch->int_msk, 0);
232 /* Turn OFF risc and fifo enable in AUD_DMA_CNTRL */
233 tmp = cx_read(sram_ch->dma_ctl);
234 cx_write(sram_ch->dma_ctl,
235 tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en));
237 /* Clear data buffer memory */
238 if (dev->_audiodata_buf_virt_addr)
239 memset(dev->_audiodata_buf_virt_addr, 0,
240 dev->_audiodata_buf_size);
242 dev->_audio_is_running = 0;
243 dev->_is_first_audio_frame = 0;
244 dev->_audioframe_count = 0;
245 dev->_audiofile_status = END_OF_FILE;
247 kfree(dev->_irq_audio_queues);
248 dev->_irq_audio_queues = NULL;
250 kfree(dev->_audiofilename);
253 void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
255 if (dev->_audio_is_running)
256 cx25821_stop_upstream_audio(dev);
258 cx25821_free_memory_audio(dev);
261 int cx25821_get_audio_data(struct cx25821_dev *dev,
262 struct sram_channel *sram_ch)
265 int frame_index_temp = dev->_audioframe_index;
267 int line_size = AUDIO_LINE_SIZE;
268 int frame_size = AUDIO_DATA_BUF_SZ;
269 int frame_offset = frame_size * frame_index_temp;
270 ssize_t vfs_read_retval = 0;
271 char mybuf[line_size];
272 loff_t file_offset = dev->_audioframe_count * frame_size;
276 if (dev->_audiofile_status == END_OF_FILE)
279 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
281 if (IS_ERR(myfile)) {
282 const int open_errno = -PTR_ERR(myfile);
283 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
284 __func__, dev->_audiofilename, open_errno);
285 return PTR_ERR(myfile);
287 if (!(myfile->f_op)) {
288 pr_err("%s(): File has no file operations registered!\n",
290 filp_close(myfile, NULL);
294 if (!myfile->f_op->read) {
295 pr_err("%s(): File has no READ operations registered!\n",
297 filp_close(myfile, NULL);
305 for (i = 0; i < dev->_audio_lines_count; i++) {
309 vfs_read(myfile, mybuf, line_size, &pos);
311 if (vfs_read_retval > 0 && vfs_read_retval == line_size
312 && dev->_audiodata_buf_virt_addr != NULL) {
313 memcpy((void *)(dev->_audiodata_buf_virt_addr +
314 frame_offset / 4), mybuf,
318 file_offset += vfs_read_retval;
319 frame_offset += vfs_read_retval;
321 if (vfs_read_retval < line_size) {
322 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
329 dev->_audioframe_count++;
331 dev->_audiofile_status =
332 (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
335 filp_close(myfile, NULL);
341 static void cx25821_audioups_handler(struct work_struct *work)
343 struct cx25821_dev *dev =
344 container_of(work, struct cx25821_dev, _audio_work_entry);
347 pr_err("ERROR %s(): since container_of(work_struct) FAILED!\n",
352 cx25821_get_audio_data(dev,
354 _audio_upstream_channel_select].
358 int cx25821_openfile_audio(struct cx25821_dev *dev,
359 struct sram_channel *sram_ch)
363 int line_size = AUDIO_LINE_SIZE;
364 ssize_t vfs_read_retval = 0;
365 char mybuf[line_size];
367 loff_t offset = (unsigned long)0;
370 myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
372 if (IS_ERR(myfile)) {
373 const int open_errno = -PTR_ERR(myfile);
374 pr_err("%s(): ERROR opening file(%s) with errno = %d!\n",
375 __func__, dev->_audiofilename, open_errno);
376 return PTR_ERR(myfile);
378 if (!(myfile->f_op)) {
379 pr_err("%s(): File has no file operations registered!\n",
381 filp_close(myfile, NULL);
385 if (!myfile->f_op->read) {
386 pr_err("%s(): File has no READ operations registered!\n",
388 filp_close(myfile, NULL);
396 for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
397 for (i = 0; i < dev->_audio_lines_count; i++) {
401 vfs_read(myfile, mybuf, line_size, &pos);
403 if (vfs_read_retval > 0
404 && vfs_read_retval == line_size
405 && dev->_audiodata_buf_virt_addr != NULL) {
406 memcpy((void *)(dev->
407 _audiodata_buf_virt_addr
408 + offset / 4), mybuf,
412 offset += vfs_read_retval;
414 if (vfs_read_retval < line_size) {
415 pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
422 dev->_audioframe_count++;
424 if (vfs_read_retval < line_size)
428 dev->_audiofile_status =
429 (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
433 filp_close(myfile, NULL);
439 static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
440 struct sram_channel *sram_ch,
445 dma_addr_t data_dma_addr;
447 cx25821_free_memory_audio(dev);
449 dev->_risc_virt_addr =
450 pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size,
452 dev->_risc_virt_start_addr = dev->_risc_virt_addr;
453 dev->_risc_phys_start_addr = dma_addr;
454 dev->_risc_phys_addr = dma_addr;
455 dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
457 if (!dev->_risc_virt_addr) {
459 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning\n"));
462 /* Clear out memory at address */
463 memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size);
465 /* For Audio Data buffer allocation */
466 dev->_audiodata_buf_virt_addr =
467 pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size,
469 dev->_audiodata_buf_phys_addr = data_dma_addr;
470 dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
472 if (!dev->_audiodata_buf_virt_addr) {
474 pr_fmt("ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning\n"));
477 /* Clear out memory at address */
478 memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size);
480 ret = cx25821_openfile_audio(dev, sram_ch);
484 /* Creating RISC programs */
486 cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl,
487 dev->_audio_lines_count);
490 pr_fmt("ERROR creating audio upstream RISC programs!\n"));
500 int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num,
505 struct sram_channel *channel = dev->channels[chan_num].sram_channels;
506 dma_addr_t risc_phys_jump_addr;
509 if (status & FLD_AUD_SRC_RISCI1) {
510 /* Get interrupt_index of the program that interrupted */
511 u32 prog_cnt = cx_read(channel->gpcnt);
513 /* Since we've identified our IRQ, clear our bits from the
514 * interrupt mask and interrupt status registers */
515 cx_write(channel->int_msk, 0);
516 cx_write(channel->int_stat, cx_read(channel->int_stat));
518 spin_lock(&dev->slock);
520 while (prog_cnt != dev->_last_index_irq) {
521 /* Update _last_index_irq */
522 if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1))
523 dev->_last_index_irq++;
525 dev->_last_index_irq = 0;
527 dev->_audioframe_index = dev->_last_index_irq;
529 queue_work(dev->_irq_audio_queues,
530 &dev->_audio_work_entry);
533 if (dev->_is_first_audio_frame) {
534 dev->_is_first_audio_frame = 0;
536 if (dev->_risc_virt_start_addr != NULL) {
537 risc_phys_jump_addr =
538 dev->_risc_phys_start_addr +
539 RISC_SYNC_INSTRUCTION_SIZE +
540 AUDIO_RISC_DMA_BUF_SIZE;
542 rp = cx25821_risc_field_upstream_audio(dev,
544 _risc_virt_start_addr
547 _audiodata_buf_phys_addr,
551 if (USE_RISC_NOOP_AUDIO) {
552 for (i = 0; i < NUM_NO_OPS; i++) {
554 cpu_to_le32(RISC_NOOP);
557 /* Jump to 2nd Audio Frame */
559 cpu_to_le32(RISC_JUMP | RISC_IRQ1 |
561 *(rp++) = cpu_to_le32(risc_phys_jump_addr);
562 *(rp++) = cpu_to_le32(0);
566 spin_unlock(&dev->slock);
568 if (status & FLD_AUD_SRC_OF)
569 pr_warn("%s(): Audio Received Overflow Error Interrupt!\n",
572 if (status & FLD_AUD_SRC_SYNC)
573 pr_warn("%s(): Audio Received Sync Error Interrupt!\n",
576 if (status & FLD_AUD_SRC_OPC_ERR)
577 pr_warn("%s(): Audio Received OpCode Error Interrupt!\n",
580 /* Read and write back the interrupt status register to clear
582 cx_write(channel->int_stat, cx_read(channel->int_stat));
585 if (dev->_audiofile_status == END_OF_FILE) {
586 pr_warn("EOF Channel Audio Framecount = %d\n",
587 dev->_audioframe_count);
590 /* ElSE, set the interrupt mask register, re-enable irq. */
591 int_msk_tmp = cx_read(channel->int_msk);
592 cx_write(channel->int_msk, int_msk_tmp |= _intr_msk);
597 static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
599 struct cx25821_dev *dev = dev_id;
600 u32 msk_stat, audio_status;
602 struct sram_channel *sram_ch;
607 sram_ch = dev->channels[dev->_audio_upstream_channel_select].sram_channels;
609 msk_stat = cx_read(sram_ch->int_mstat);
610 audio_status = cx_read(sram_ch->int_stat);
612 /* Only deal with our interrupt */
615 cx25821_audio_upstream_irq(dev,
617 _audio_upstream_channel_select,
622 cx25821_stop_upstream_audio(dev);
626 return IRQ_RETVAL(handled);
629 static void cx25821_wait_fifo_enable(struct cx25821_dev *dev,
630 struct sram_channel *sram_ch)
636 /* Wait 10 microsecond before checking to see if the FIFO is
640 tmp = cx_read(sram_ch->dma_ctl);
642 /* 10 millisecond timeout */
643 if (count++ > 1000) {
644 pr_err("ERROR: %s() fifo is NOT turned on. Timeout!\n",
649 } while (!(tmp & sram_ch->fld_aud_fifo_en));
653 int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
654 struct sram_channel *sram_ch)
659 /* Set the physical start address of the RISC program in the initial
660 * program counter(IPC) member of the CMDS. */
661 cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
662 /* Risc IPC High 64 bits 63-32 */
663 cx_write(sram_ch->cmds_start + 4, 0);
666 cx_write(sram_ch->gpcnt_ctl, 3);
668 /* Set the line length (It looks like we do not need to set the
670 cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
672 /* Set the input mode to 16-bit */
673 tmp = cx_read(sram_ch->aud_cfg);
675 FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE |
676 FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
677 cx_write(sram_ch->aud_cfg, tmp);
679 /* Read and write back the interrupt status register to clear it */
680 tmp = cx_read(sram_ch->int_stat);
681 cx_write(sram_ch->int_stat, tmp);
683 /* Clear our bits from the interrupt status register. */
684 cx_write(sram_ch->int_stat, _intr_msk);
686 /* Set the interrupt mask register, enable irq. */
687 cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
688 tmp = cx_read(sram_ch->int_msk);
689 cx_write(sram_ch->int_msk, tmp |= _intr_msk);
692 request_irq(dev->pci->irq, cx25821_upstream_irq_audio,
693 IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
695 pr_err("%s: can't get upstream IRQ %d\n",
696 dev->name, dev->pci->irq);
700 /* Start the DMA engine */
701 tmp = cx_read(sram_ch->dma_ctl);
702 cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en);
704 dev->_audio_is_running = 1;
705 dev->_is_first_audio_frame = 1;
707 /* The fifo_en bit turns on by the first Risc program */
708 cx25821_wait_fifo_enable(dev, sram_ch);
713 cx25821_dev_unregister(dev);
717 int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
719 struct sram_channel *sram_ch;
724 if (dev->_audio_is_running) {
725 pr_warn("Audio Channel is still running so return!\n");
729 dev->_audio_upstream_channel_select = channel_select;
730 sram_ch = dev->channels[channel_select].sram_channels;
733 INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
734 dev->_irq_audio_queues =
735 create_singlethread_workqueue("cx25821_audioworkqueue");
737 if (!dev->_irq_audio_queues) {
739 pr_fmt("ERROR: create_singlethread_workqueue() for Audio FAILED!\n"));
743 dev->_last_index_irq = 0;
744 dev->_audio_is_running = 0;
745 dev->_audioframe_count = 0;
746 dev->_audiofile_status = RESET_STATUS;
747 dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
748 _line_size = AUDIO_LINE_SIZE;
750 if (dev->input_audiofilename) {
751 str_length = strlen(dev->input_audiofilename);
752 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
754 if (!dev->_audiofilename)
757 memcpy(dev->_audiofilename, dev->input_audiofilename,
760 /* Default if filename is empty string */
761 if (strcmp(dev->input_audiofilename, "") == 0)
762 dev->_audiofilename = "/root/audioGOOD.wav";
764 str_length = strlen(_defaultAudioName);
765 dev->_audiofilename = kmalloc(str_length + 1, GFP_KERNEL);
767 if (!dev->_audiofilename)
770 memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
774 cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size,
777 dev->audio_upstream_riscbuf_size =
778 AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS +
779 RISC_SYNC_INSTRUCTION_SIZE;
780 dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
782 /* Allocating buffers and prepare RISC program */
784 cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size);
786 pr_err("%s: Failed to set up Audio upstream buffers!\n",
790 /* Start RISC engine */
791 cx25821_start_audio_dma_upstream(dev, sram_ch);
796 cx25821_dev_unregister(dev);