diff options
Diffstat (limited to 'drivers/staging/cx25821/cx25821-audio-upstream.c')
-rw-r--r-- | drivers/staging/cx25821/cx25821-audio-upstream.c | 1628 |
1 files changed, 804 insertions, 824 deletions
diff --git a/drivers/staging/cx25821/cx25821-audio-upstream.c b/drivers/staging/cx25821/cx25821-audio-upstream.c index 376c953..ddddf65 100644 --- a/drivers/staging/cx25821/cx25821-audio-upstream.c +++ b/drivers/staging/cx25821/cx25821-audio-upstream.c @@ -1,824 +1,804 @@ -/*
- * Driver for the Conexant CX25821 PCIe bridge
- *
- * Copyright (C) 2009 Conexant Systems Inc.
- * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#include "cx25821-video.h"
-#include "cx25821-audio-upstream.h"
-
-#include <linux/fs.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/syscalls.h>
-#include <linux/file.h>
-#include <linux/fcntl.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-
-
-MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
-MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
-MODULE_LICENSE("GPL");
-
-
-static int _intr_msk = FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF | FLD_AUD_SRC_SYNC | FLD_AUD_SRC_OPC_ERR;
-
-
-int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev,
- struct sram_channel *ch,
- unsigned int bpl, u32 risc)
-{
- unsigned int i, lines;
- u32 cdt;
-
-
- if (ch->cmds_start == 0) {
- cx_write(ch->ptr1_reg, 0);
- cx_write(ch->ptr2_reg, 0);
- cx_write(ch->cnt2_reg, 0);
- cx_write(ch->cnt1_reg, 0);
- return 0;
- }
-
- bpl = (bpl + 7) & ~7; /* alignment */
- cdt = ch->cdt;
- lines = ch->fifo_size / bpl;
-
- if (lines > 3)
- {
- lines = 3;
- }
-
- BUG_ON(lines < 2);
-
-
- /* write CDT */
- for (i = 0; i < lines; i++) {
- cx_write(cdt + 16*i, ch->fifo_start + bpl*i);
- cx_write(cdt + 16*i + 4, 0);
- cx_write(cdt + 16*i + 8, 0);
- cx_write(cdt + 16*i + 12, 0);
- }
-
- /* write CMDS */
- cx_write(ch->cmds_start + 0, risc);
-
- cx_write(ch->cmds_start + 4, 0);
- cx_write(ch->cmds_start + 8, cdt);
- cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW);
- cx_write(ch->cmds_start + 16, ch->ctrl_start);
-
- //IQ size
- cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW);
-
- for (i = 24; i < 80; i += 4)
- cx_write(ch->cmds_start + i, 0);
-
- /* fill registers */
- cx_write(ch->ptr1_reg, ch->fifo_start);
- cx_write(ch->ptr2_reg, cdt);
- cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW);
- cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1);
-
- return 0;
-}
-
-
-static __le32 *cx25821_risc_field_upstream_audio( struct cx25821_dev *dev, __le32 *rp,
- dma_addr_t databuf_phys_addr,
- unsigned int bpl, int fifo_enable)
-{
- unsigned int line;
- struct sram_channel *sram_ch = &dev->sram_channels[dev->_audio_upstream_channel_select];
- int offset = 0;
-
-
- /* scan lines */
- for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++)
- {
- *(rp++) = cpu_to_le32(RISC_READ|RISC_SOL|RISC_EOL|bpl);
- *(rp++) = cpu_to_le32(databuf_phys_addr + offset);
- *(rp++) = cpu_to_le32(0); /* bits 63-32 */
-
- // Check if we need to enable the FIFO after the first 3 lines
- // For the upstream audio channel, the risc engine will enable the FIFO.
- if ( fifo_enable && line == 2 )
- {
- *(rp++) = RISC_WRITECR;
- *(rp++) = sram_ch->dma_ctl;
- *(rp++) = sram_ch->fld_aud_fifo_en;
- *(rp++) = 0x00000020;
- }
-
- offset += AUDIO_LINE_SIZE;
- }
-
- return rp;
-}
-
-int cx25821_risc_buffer_upstream_audio( struct cx25821_dev *dev,
- struct pci_dev *pci,
- unsigned int bpl, unsigned int lines)
-{
- __le32 *rp;
- int fifo_enable = 0;
- int frame = 0, i = 0;
- int frame_size = AUDIO_DATA_BUF_SZ;
- int databuf_offset = 0;
- int risc_flag = RISC_CNT_INC;
- dma_addr_t risc_phys_jump_addr;
-
-
- /* Virtual address of Risc buffer program */
- rp = dev->_risc_virt_addr;
-
- /* sync instruction */
- *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE);
-
-
- for( frame = 0; frame < NUM_AUDIO_FRAMES; frame++ )
- {
- databuf_offset = frame_size * frame;
-
- if( frame == 0 )
- {
- fifo_enable = 1;
- risc_flag = RISC_CNT_RESET;
- }
- else
- {
- fifo_enable = 0;
- risc_flag = RISC_CNT_INC;
- }
-
- //Calculate physical jump address
- if( (frame+1) == NUM_AUDIO_FRAMES )
- {
- risc_phys_jump_addr = dev->_risc_phys_start_addr + RISC_SYNC_INSTRUCTION_SIZE;
- }
- else
- {
- risc_phys_jump_addr = dev->_risc_phys_start_addr + RISC_SYNC_INSTRUCTION_SIZE + AUDIO_RISC_DMA_BUF_SIZE*(frame+1);
- }
-
- rp = cx25821_risc_field_upstream_audio(dev, rp, dev->_audiodata_buf_phys_addr+databuf_offset, bpl, fifo_enable);
-
-
- if( USE_RISC_NOOP_AUDIO )
- {
- for( i = 0; i < NUM_NO_OPS; i++ )
- {
- *(rp++) = cpu_to_le32(RISC_NOOP);
- }
- }
-
-
- // Loop to (Nth)FrameRISC or to Start of Risc program & generate IRQ
- *(rp++) = cpu_to_le32(RISC_JUMP|RISC_IRQ1|risc_flag);
- *(rp++) = cpu_to_le32(risc_phys_jump_addr);
- *(rp++) = cpu_to_le32(0);
-
- //Recalculate virtual address based on frame index
- rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE/4 + (AUDIO_RISC_DMA_BUF_SIZE*(frame+1)/4 ) ;
- }
-
- return 0;
-}
-
-
-void cx25821_free_memory_audio(struct cx25821_dev *dev)
-{
- if (dev->_risc_virt_addr)
- {
- pci_free_consistent(dev->pci, dev->_audiorisc_size, dev->_risc_virt_addr, dev->_risc_phys_addr);
- dev->_risc_virt_addr = NULL;
- }
-
- if (dev->_audiodata_buf_virt_addr)
- {
- pci_free_consistent(dev->pci, dev->_audiodata_buf_size, dev->_audiodata_buf_virt_addr, dev->_audiodata_buf_phys_addr);
- dev->_audiodata_buf_virt_addr = NULL;
- }
-}
-
-void cx25821_stop_upstream_audio(struct cx25821_dev *dev)
-{
- struct sram_channel *sram_ch = &dev->sram_channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B];
- u32 tmp = 0;
-
- if( !dev->_audio_is_running )
- {
- printk("cx25821: No audio file is currently running so return!\n");
- return;
- }
-
- //Disable RISC interrupts
- cx_write( sram_ch->int_msk, 0 );
-
- //Turn OFF risc and fifo enable in AUD_DMA_CNTRL
- tmp = cx_read( sram_ch->dma_ctl );
- cx_write( sram_ch->dma_ctl, tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en) );
-
- //Clear data buffer memory
- if( dev->_audiodata_buf_virt_addr )
- memset( dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size );
-
- dev->_audio_is_running = 0;
- dev->_is_first_audio_frame = 0;
- dev->_audioframe_count = 0;
- dev->_audiofile_status = END_OF_FILE;
-
- if( dev->_irq_audio_queues )
- {
- kfree(dev->_irq_audio_queues);
- dev->_irq_audio_queues = NULL;
- }
-
- if( dev->_audiofilename != NULL )
- kfree(dev->_audiofilename);
-}
-
-
-void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev)
-{
- if( dev->_audio_is_running )
- {
- cx25821_stop_upstream_audio(dev);
- }
-
- cx25821_free_memory_audio(dev);
-}
-
-
-int cx25821_get_audio_data(struct cx25821_dev *dev, struct sram_channel *sram_ch )
-{
- struct file * myfile;
- int frame_index_temp = dev->_audioframe_index;
- int i = 0;
- int line_size = AUDIO_LINE_SIZE;
- int frame_size = AUDIO_DATA_BUF_SZ;
- int frame_offset = frame_size * frame_index_temp;
- ssize_t vfs_read_retval = 0;
- char mybuf[line_size];
- loff_t file_offset = dev->_audioframe_count * frame_size;
- loff_t pos;
- mm_segment_t old_fs;
-
-
- if( dev->_audiofile_status == END_OF_FILE )
- return 0;
-
- myfile = filp_open( dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0 );
-
-
- if (IS_ERR(myfile))
- {
- const int open_errno = -PTR_ERR(myfile);
- printk("%s(): ERROR opening file(%s) with errno = %d! \n", __func__, dev->_audiofilename, open_errno);
- return PTR_ERR(myfile);
- }
- else
- {
- if( !(myfile->f_op) )
- {
- printk("%s: File has no file operations registered!\n", __func__);
- filp_close(myfile, NULL);
- return -EIO;
- }
-
-
- if( !myfile->f_op->read )
- {
- printk("%s: File has no READ operations registered! \n", __func__);
- filp_close(myfile, NULL);
- return -EIO;
- }
-
- pos = myfile->f_pos;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
-
- for( i = 0; i < dev->_audio_lines_count; i++ )
- {
- pos = file_offset;
-
- vfs_read_retval = vfs_read(myfile, mybuf, line_size, &pos);
-
-
- if( vfs_read_retval > 0 && vfs_read_retval == line_size && dev->_audiodata_buf_virt_addr != NULL )
- {
- memcpy( (void*)(dev->_audiodata_buf_virt_addr+frame_offset/4), mybuf, vfs_read_retval);
- }
-
- file_offset += vfs_read_retval;
- frame_offset += vfs_read_retval;
-
- if( vfs_read_retval < line_size )
- {
- printk(KERN_INFO "Done: exit %s() since no more bytes to read from Audio file.\n", __func__ );
- break;
- }
- }
-
- if( i > 0 )
- dev->_audioframe_count++;
-
- dev->_audiofile_status = (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
-
-
- set_fs(old_fs);
- filp_close(myfile, NULL);
- }
-
- return 0;
-}
-
-static void cx25821_audioups_handler(struct work_struct *work)
-{
- struct cx25821_dev *dev = container_of(work, struct cx25821_dev, _audio_work_entry);
-
- if( !dev )
- {
- printk("ERROR %s(): since container_of(work_struct) FAILED! \n", __func__ );
- return;
- }
-
- cx25821_get_audio_data( dev, &dev->sram_channels[dev->_audio_upstream_channel_select] );
-}
-
-int cx25821_openfile_audio(struct cx25821_dev *dev, struct sram_channel *sram_ch)
-{
- struct file * myfile;
- int i = 0, j = 0;
- int line_size = AUDIO_LINE_SIZE;
- ssize_t vfs_read_retval = 0;
- char mybuf[line_size];
- loff_t pos;
- loff_t offset = (unsigned long)0;
- mm_segment_t old_fs;
-
-
- myfile = filp_open( dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0 );
-
-
- if (IS_ERR(myfile))
- {
- const int open_errno = -PTR_ERR(myfile);
- printk("%s(): ERROR opening file(%s) with errno = %d! \n", __func__, dev->_audiofilename, open_errno);
- return PTR_ERR(myfile);
- }
- else
- {
- if( !(myfile->f_op) )
- {
- printk("%s: File has no file operations registered! \n", __func__);
- filp_close(myfile, NULL);
- return -EIO;
- }
-
-
- if( !myfile->f_op->read )
- {
- printk("%s: File has no READ operations registered! \n", __func__);
- filp_close(myfile, NULL);
- return -EIO;
- }
-
- pos = myfile->f_pos;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
-
- for( j = 0; j < NUM_AUDIO_FRAMES; j++ )
- {
- for( i = 0; i < dev->_audio_lines_count; i++ )
- {
- pos = offset;
-
- vfs_read_retval = vfs_read(myfile, mybuf, line_size, &pos);
-
-
- if( vfs_read_retval > 0 && vfs_read_retval == line_size && dev->_audiodata_buf_virt_addr != NULL )
- {
- memcpy( (void*)(dev->_audiodata_buf_virt_addr+offset/4), mybuf, vfs_read_retval);
- }
-
- offset += vfs_read_retval;
-
- if( vfs_read_retval < line_size )
- {
- printk(KERN_INFO "Done: exit %s() since no more bytes to read from Audio file.\n", __func__ );
- break;
- }
- }
-
- if( i > 0 )
- {
- dev->_audioframe_count++;
- }
-
- if( vfs_read_retval < line_size )
- {
- break;
- }
- }
-
- dev->_audiofile_status = (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
-
- set_fs(old_fs);
- myfile->f_pos = 0;
- filp_close(myfile, NULL);
- }
-
- return 0;
-}
-
-static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev,
- struct sram_channel *sram_ch,
- int bpl)
-{
- int ret = 0;
- dma_addr_t dma_addr;
- dma_addr_t data_dma_addr;
-
-
- cx25821_free_memory_audio(dev);
-
- dev->_risc_virt_addr = pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size, &dma_addr);
- dev->_risc_virt_start_addr = dev->_risc_virt_addr;
- dev->_risc_phys_start_addr = dma_addr;
- dev->_risc_phys_addr = dma_addr;
- dev->_audiorisc_size = dev->audio_upstream_riscbuf_size;
-
-
- if (!dev->_risc_virt_addr)
- {
- printk("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning.\n");
- return -ENOMEM;
- }
-
- //Clear out memory at address
- memset( dev->_risc_virt_addr, 0, dev->_audiorisc_size );
-
-
- //For Audio Data buffer allocation
- dev->_audiodata_buf_virt_addr = pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size, &data_dma_addr);
- dev->_audiodata_buf_phys_addr = data_dma_addr;
- dev->_audiodata_buf_size = dev->audio_upstream_databuf_size;
-
- if (!dev->_audiodata_buf_virt_addr)
- {
- printk("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning. \n");
- return -ENOMEM;
- }
-
- //Clear out memory at address
- memset( dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size );
-
-
- ret = cx25821_openfile_audio(dev, sram_ch);
- if( ret < 0 )
- return ret;
-
-
- //Creating RISC programs
- ret = cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl, dev->_audio_lines_count );
- if (ret < 0)
- {
- printk(KERN_DEBUG "cx25821 ERROR creating audio upstream RISC programs! \n");
- goto error;
- }
-
- return 0;
-
-error:
- return ret;
-}
-
-int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num, u32 status)
-{
- int i = 0;
- u32 int_msk_tmp;
- struct sram_channel *channel = &dev->sram_channels[chan_num];
- dma_addr_t risc_phys_jump_addr;
- __le32 * rp;
-
-
- if (status & FLD_AUD_SRC_RISCI1)
- {
- //Get interrupt_index of the program that interrupted
- u32 prog_cnt = cx_read( channel->gpcnt );
-
- //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers
- cx_write(channel->int_msk, 0);
- cx_write(channel->int_stat, cx_read(channel->int_stat) );
-
- spin_lock(&dev->slock);
-
-
- while(prog_cnt != dev->_last_index_irq)
- {
- //Update _last_index_irq
- if(dev->_last_index_irq < (NUMBER_OF_PROGRAMS-1))
- {
- dev->_last_index_irq++;
- }
- else
- {
- dev->_last_index_irq = 0;
- }
-
- dev->_audioframe_index = dev->_last_index_irq;
-
- queue_work(dev->_irq_audio_queues, &dev->_audio_work_entry);
- }
-
-
- if ( dev->_is_first_audio_frame )
- {
- dev->_is_first_audio_frame = 0;
-
- if( dev->_risc_virt_start_addr != NULL )
- {
- risc_phys_jump_addr = dev->_risc_phys_start_addr + RISC_SYNC_INSTRUCTION_SIZE + AUDIO_RISC_DMA_BUF_SIZE;
-
- rp = cx25821_risc_field_upstream_audio(dev, dev->_risc_virt_start_addr+1, dev->_audiodata_buf_phys_addr, AUDIO_LINE_SIZE, FIFO_DISABLE);
-
- if( USE_RISC_NOOP_AUDIO )
- {
- for( i = 0; i < NUM_NO_OPS; i++ )
- {
- *(rp++) = cpu_to_le32(RISC_NOOP);
- }
- }
-
- // Jump to 2nd Audio Frame
- *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_RESET);
- *(rp++) = cpu_to_le32(risc_phys_jump_addr);
- *(rp++) = cpu_to_le32(0);
- }
- }
-
- spin_unlock(&dev->slock);
- }
- else
- {
- if(status & FLD_AUD_SRC_OF)
- printk("%s: Audio Received Overflow Error Interrupt!\n", __func__);
-
- if(status & FLD_AUD_SRC_SYNC)
- printk("%s: Audio Received Sync Error Interrupt!\n", __func__);
-
- if(status & FLD_AUD_SRC_OPC_ERR)
- printk("%s: Audio Received OpCode Error Interrupt!\n", __func__);
-
- // Read and write back the interrupt status register to clear our bits
- cx_write(channel->int_stat, cx_read(channel->int_stat) );
- }
-
-
- if( dev->_audiofile_status == END_OF_FILE )
- {
- printk("cx25821: EOF Channel Audio Framecount = %d\n", dev->_audioframe_count );
- return -1;
- }
-
- //ElSE, set the interrupt mask register, re-enable irq.
- int_msk_tmp = cx_read( channel->int_msk );
- cx_write( channel->int_msk, int_msk_tmp |= _intr_msk );
-
- return 0;
-}
-
-static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id)
-{
- struct cx25821_dev *dev = dev_id;
- u32 msk_stat, audio_status;
- int handled = 0;
- struct sram_channel *sram_ch;
-
-
- if( !dev )
- return -1;
-
-
- sram_ch = &dev->sram_channels[dev->_audio_upstream_channel_select];
-
- msk_stat = cx_read(sram_ch->int_mstat);
- audio_status = cx_read(sram_ch->int_stat);
-
- // Only deal with our interrupt
- if(audio_status)
- {
- handled = cx25821_audio_upstream_irq(dev, dev->_audio_upstream_channel_select, audio_status);
- }
-
-
- if( handled < 0 )
- {
- cx25821_stop_upstream_audio(dev);
- }
- else
- {
- handled += handled;
- }
-
- return IRQ_RETVAL(handled);
-}
-
-
-static void cx25821_wait_fifo_enable(struct cx25821_dev *dev, struct sram_channel *sram_ch)
-{
- int count = 0;
- u32 tmp;
-
- do
- {
- //Wait 10 microsecond before checking to see if the FIFO is turned ON.
- udelay(10);
-
- tmp = cx_read( sram_ch->dma_ctl );
-
- if(count++ > 1000) //10 millisecond timeout
- {
- printk("cx25821 ERROR: %s() fifo is NOT turned on. Timeout!\n", __func__);
- return;
- }
-
- } while( !(tmp & sram_ch->fld_aud_fifo_en) );
-
-}
-
-
-int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev,
- struct sram_channel *sram_ch)
-{
- u32 tmp = 0;
- int err = 0;
-
-
- // Set the physical start address of the RISC program in the initial program counter(IPC) member of the CMDS.
- cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr);
- cx_write(sram_ch->cmds_start + 4, 0); /* Risc IPC High 64 bits 63-32 */
-
-
- /* reset counter */
- cx_write(sram_ch->gpcnt_ctl, 3);
-
- //Set the line length (It looks like we do not need to set the line length)
- cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH);
-
- //Set the input mode to 16-bit
- tmp = cx_read( sram_ch->aud_cfg );
- tmp |= FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE | FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE;
- cx_write( sram_ch->aud_cfg, tmp );
-
- // Read and write back the interrupt status register to clear it
- tmp = cx_read( sram_ch->int_stat);
- cx_write( sram_ch->int_stat, tmp);
-
- // Clear our bits from the interrupt status register.
- cx_write( sram_ch->int_stat, _intr_msk );
-
-
- //Set the interrupt mask register, enable irq.
- cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit));
- tmp = cx_read( sram_ch->int_msk );
- cx_write( sram_ch->int_msk, tmp |= _intr_msk );
-
-
- err = request_irq(dev->pci->irq, cx25821_upstream_irq_audio, IRQF_SHARED | IRQF_DISABLED, dev->name, dev);
- if (err < 0)
- {
- printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name, dev->pci->irq);
- goto fail_irq;
- }
-
-
- // Start the DMA engine
- tmp = cx_read( sram_ch->dma_ctl );
- cx_set( sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en );
-
- dev->_audio_is_running = 1;
- dev->_is_first_audio_frame = 1;
-
- // The fifo_en bit turns on by the first Risc program
- cx25821_wait_fifo_enable(dev, sram_ch);
-
- return 0;
-
-
-fail_irq:
- cx25821_dev_unregister(dev);
- return err;
-}
-
-
-int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select)
-{
- struct sram_channel *sram_ch;
- int retval = 0;
- int err = 0;
- int str_length = 0;
-
- if( dev->_audio_is_running )
- {
- printk("Audio Channel is still running so return!\n");
- return 0;
- }
-
- dev->_audio_upstream_channel_select = channel_select;
- sram_ch = &dev->sram_channels[channel_select];
-
- //Work queue
- INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler);
- dev->_irq_audio_queues = create_singlethread_workqueue("cx25821_audioworkqueue");
-
- if(!dev->_irq_audio_queues)
- {
- printk("cx25821 ERROR: create_singlethread_workqueue() for Audio FAILED!\n");
- return -ENOMEM;
- }
-
-
- dev->_last_index_irq = 0;
- dev->_audio_is_running = 0;
- dev->_audioframe_count = 0;
- dev->_audiofile_status = RESET_STATUS;
- dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER;
- _line_size = AUDIO_LINE_SIZE;
-
-
- if( dev->input_audiofilename )
- {
- str_length = strlen(dev->input_audiofilename);
- dev->_audiofilename = (char *) kmalloc(str_length + 1, GFP_KERNEL);
-
- if( !dev->_audiofilename )
- goto error;
-
- memcpy(dev->_audiofilename, dev->input_audiofilename, str_length + 1);
-
- //Default if filename is empty string
- if( strcmp(dev->input_audiofilename,"") == 0)
- {
- dev->_audiofilename = "/root/audioGOOD.wav";
- }
- }
- else
- {
- str_length = strlen(_defaultAudioName);
- dev->_audiofilename = (char *) kmalloc(str_length + 1, GFP_KERNEL);
-
- if( !dev->_audiofilename )
- goto error;
-
- memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1);
- }
-
-
- retval = cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size, 0);
-
- dev->audio_upstream_riscbuf_size = AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS + RISC_SYNC_INSTRUCTION_SIZE;
- dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS;
-
-
- //Allocating buffers and prepare RISC program
- retval = cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size);
- if (retval < 0)
- {
- printk(KERN_ERR "%s: Failed to set up Audio upstream buffers!\n", dev->name);
- goto error;
- }
-
- //Start RISC engine
- cx25821_start_audio_dma_upstream(dev, sram_ch);
-
- return 0;
-
-error:
- cx25821_dev_unregister(dev);
-
- return err;
-}
+/* + * Driver for the Conexant CX25821 PCIe bridge + * + * Copyright (C) 2009 Conexant Systems Inc. + * Authors <hiep.huynh@conexant.com>, <shu.lin@conexant.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "cx25821-video.h" +#include "cx25821-audio-upstream.h" + +#include <linux/fs.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/syscalls.h> +#include <linux/file.h> +#include <linux/fcntl.h> +#include <linux/delay.h> +#include <asm/uaccess.h> + +MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards"); +MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>"); +MODULE_LICENSE("GPL"); + +static int _intr_msk = + FLD_AUD_SRC_RISCI1 | FLD_AUD_SRC_OF | FLD_AUD_SRC_SYNC | + FLD_AUD_SRC_OPC_ERR; + +int cx25821_sram_channel_setup_upstream_audio(struct cx25821_dev *dev, + struct sram_channel *ch, + unsigned int bpl, u32 risc) +{ + unsigned int i, lines; + u32 cdt; + + if (ch->cmds_start == 0) { + cx_write(ch->ptr1_reg, 0); + cx_write(ch->ptr2_reg, 0); + cx_write(ch->cnt2_reg, 0); + cx_write(ch->cnt1_reg, 0); + return 0; + } + + bpl = (bpl + 7) & ~7; /* alignment */ + cdt = ch->cdt; + lines = ch->fifo_size / bpl; + + if (lines > 3) { + lines = 3; + } + + BUG_ON(lines < 2); + + /* write CDT */ + for (i = 0; i < lines; i++) { + cx_write(cdt + 16 * i, ch->fifo_start + bpl * i); + cx_write(cdt + 16 * i + 4, 0); + cx_write(cdt + 16 * i + 8, 0); + cx_write(cdt + 16 * i + 12, 0); + } + + /* write CMDS */ + cx_write(ch->cmds_start + 0, risc); + + cx_write(ch->cmds_start + 4, 0); + cx_write(ch->cmds_start + 8, cdt); + cx_write(ch->cmds_start + 12, AUDIO_CDT_SIZE_QW); + cx_write(ch->cmds_start + 16, ch->ctrl_start); + + //IQ size + cx_write(ch->cmds_start + 20, AUDIO_IQ_SIZE_DW); + + for (i = 24; i < 80; i += 4) + cx_write(ch->cmds_start + i, 0); + + /* fill registers */ + cx_write(ch->ptr1_reg, ch->fifo_start); + cx_write(ch->ptr2_reg, cdt); + cx_write(ch->cnt2_reg, AUDIO_CDT_SIZE_QW); + cx_write(ch->cnt1_reg, AUDIO_CLUSTER_SIZE_QW - 1); + + return 0; +} + +static __le32 *cx25821_risc_field_upstream_audio(struct cx25821_dev *dev, + __le32 * rp, + dma_addr_t databuf_phys_addr, + unsigned int bpl, + int fifo_enable) +{ + unsigned int line; + struct sram_channel *sram_ch = + &dev->sram_channels[dev->_audio_upstream_channel_select]; + int offset = 0; + + /* scan lines */ + for (line = 0; line < LINES_PER_AUDIO_BUFFER; line++) { + *(rp++) = cpu_to_le32(RISC_READ | RISC_SOL | RISC_EOL | bpl); + *(rp++) = cpu_to_le32(databuf_phys_addr + offset); + *(rp++) = cpu_to_le32(0); /* bits 63-32 */ + + // Check if we need to enable the FIFO after the first 3 lines + // For the upstream audio channel, the risc engine will enable the FIFO. + if (fifo_enable && line == 2) { + *(rp++) = RISC_WRITECR; + *(rp++) = sram_ch->dma_ctl; + *(rp++) = sram_ch->fld_aud_fifo_en; + *(rp++) = 0x00000020; + } + + offset += AUDIO_LINE_SIZE; + } + + return rp; +} + +int cx25821_risc_buffer_upstream_audio(struct cx25821_dev *dev, + struct pci_dev *pci, + unsigned int bpl, unsigned int lines) +{ + __le32 *rp; + int fifo_enable = 0; + int frame = 0, i = 0; + int frame_size = AUDIO_DATA_BUF_SZ; + int databuf_offset = 0; + int risc_flag = RISC_CNT_INC; + dma_addr_t risc_phys_jump_addr; + + /* Virtual address of Risc buffer program */ + rp = dev->_risc_virt_addr; + + /* sync instruction */ + *(rp++) = cpu_to_le32(RISC_RESYNC | AUDIO_SYNC_LINE); + + for (frame = 0; frame < NUM_AUDIO_FRAMES; frame++) { + databuf_offset = frame_size * frame; + + if (frame == 0) { + fifo_enable = 1; + risc_flag = RISC_CNT_RESET; + } else { + fifo_enable = 0; + risc_flag = RISC_CNT_INC; + } + + //Calculate physical jump address + if ((frame + 1) == NUM_AUDIO_FRAMES) { + risc_phys_jump_addr = + dev->_risc_phys_start_addr + + RISC_SYNC_INSTRUCTION_SIZE; + } else { + risc_phys_jump_addr = + dev->_risc_phys_start_addr + + RISC_SYNC_INSTRUCTION_SIZE + + AUDIO_RISC_DMA_BUF_SIZE * (frame + 1); + } + + rp = cx25821_risc_field_upstream_audio(dev, rp, + dev-> + _audiodata_buf_phys_addr + + databuf_offset, bpl, + fifo_enable); + + if (USE_RISC_NOOP_AUDIO) { + for (i = 0; i < NUM_NO_OPS; i++) { + *(rp++) = cpu_to_le32(RISC_NOOP); + } + } + + // Loop to (Nth)FrameRISC or to Start of Risc program & generate IRQ + *(rp++) = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | risc_flag); + *(rp++) = cpu_to_le32(risc_phys_jump_addr); + *(rp++) = cpu_to_le32(0); + + //Recalculate virtual address based on frame index + rp = dev->_risc_virt_addr + RISC_SYNC_INSTRUCTION_SIZE / 4 + + (AUDIO_RISC_DMA_BUF_SIZE * (frame + 1) / 4); + } + + return 0; +} + +void cx25821_free_memory_audio(struct cx25821_dev *dev) +{ + if (dev->_risc_virt_addr) { + pci_free_consistent(dev->pci, dev->_audiorisc_size, + dev->_risc_virt_addr, dev->_risc_phys_addr); + dev->_risc_virt_addr = NULL; + } + + if (dev->_audiodata_buf_virt_addr) { + pci_free_consistent(dev->pci, dev->_audiodata_buf_size, + dev->_audiodata_buf_virt_addr, + dev->_audiodata_buf_phys_addr); + dev->_audiodata_buf_virt_addr = NULL; + } +} + +void cx25821_stop_upstream_audio(struct cx25821_dev *dev) +{ + struct sram_channel *sram_ch = + &dev->sram_channels[AUDIO_UPSTREAM_SRAM_CHANNEL_B]; + u32 tmp = 0; + + if (!dev->_audio_is_running) { + printk + ("cx25821: No audio file is currently running so return!\n"); + return; + } + //Disable RISC interrupts + cx_write(sram_ch->int_msk, 0); + + //Turn OFF risc and fifo enable in AUD_DMA_CNTRL + tmp = cx_read(sram_ch->dma_ctl); + cx_write(sram_ch->dma_ctl, + tmp & ~(sram_ch->fld_aud_fifo_en | sram_ch->fld_aud_risc_en)); + + //Clear data buffer memory + if (dev->_audiodata_buf_virt_addr) + memset(dev->_audiodata_buf_virt_addr, 0, + dev->_audiodata_buf_size); + + dev->_audio_is_running = 0; + dev->_is_first_audio_frame = 0; + dev->_audioframe_count = 0; + dev->_audiofile_status = END_OF_FILE; + + if (dev->_irq_audio_queues) { + kfree(dev->_irq_audio_queues); + dev->_irq_audio_queues = NULL; + } + + if (dev->_audiofilename != NULL) + kfree(dev->_audiofilename); +} + +void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev) +{ + if (dev->_audio_is_running) { + cx25821_stop_upstream_audio(dev); + } + + cx25821_free_memory_audio(dev); +} + +int cx25821_get_audio_data(struct cx25821_dev *dev, + struct sram_channel *sram_ch) +{ + struct file *myfile; + int frame_index_temp = dev->_audioframe_index; + int i = 0; + int line_size = AUDIO_LINE_SIZE; + int frame_size = AUDIO_DATA_BUF_SZ; + int frame_offset = frame_size * frame_index_temp; + ssize_t vfs_read_retval = 0; + char mybuf[line_size]; + loff_t file_offset = dev->_audioframe_count * frame_size; + loff_t pos; + mm_segment_t old_fs; + + if (dev->_audiofile_status == END_OF_FILE) + return 0; + + myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); + + if (IS_ERR(myfile)) { + const int open_errno = -PTR_ERR(myfile); + printk("%s(): ERROR opening file(%s) with errno = %d! \n", + __func__, dev->_audiofilename, open_errno); + return PTR_ERR(myfile); + } else { + if (!(myfile->f_op)) { + printk("%s: File has no file operations registered!\n", + __func__); + filp_close(myfile, NULL); + return -EIO; + } + + if (!myfile->f_op->read) { + printk("%s: File has no READ operations registered! \n", + __func__); + filp_close(myfile, NULL); + return -EIO; + } + + pos = myfile->f_pos; + old_fs = get_fs(); + set_fs(KERNEL_DS); + + for (i = 0; i < dev->_audio_lines_count; i++) { + pos = file_offset; + + vfs_read_retval = + vfs_read(myfile, mybuf, line_size, &pos); + + if (vfs_read_retval > 0 && vfs_read_retval == line_size + && dev->_audiodata_buf_virt_addr != NULL) { + memcpy((void *)(dev->_audiodata_buf_virt_addr + + frame_offset / 4), mybuf, + vfs_read_retval); + } + + file_offset += vfs_read_retval; + frame_offset += vfs_read_retval; + + if (vfs_read_retval < line_size) { + printk(KERN_INFO + "Done: exit %s() since no more bytes to read from Audio file.\n", + __func__); + break; + } + } + + if (i > 0) + dev->_audioframe_count++; + + dev->_audiofile_status = + (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE; + + set_fs(old_fs); + filp_close(myfile, NULL); + } + + return 0; +} + +static void cx25821_audioups_handler(struct work_struct *work) +{ + struct cx25821_dev *dev = + container_of(work, struct cx25821_dev, _audio_work_entry); + + if (!dev) { + printk("ERROR %s(): since container_of(work_struct) FAILED! \n", + __func__); + return; + } + + cx25821_get_audio_data(dev, + &dev->sram_channels[dev-> + _audio_upstream_channel_select]); +} + +int cx25821_openfile_audio(struct cx25821_dev *dev, + struct sram_channel *sram_ch) +{ + struct file *myfile; + int i = 0, j = 0; + int line_size = AUDIO_LINE_SIZE; + ssize_t vfs_read_retval = 0; + char mybuf[line_size]; + loff_t pos; + loff_t offset = (unsigned long)0; + mm_segment_t old_fs; + + myfile = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0); + + if (IS_ERR(myfile)) { + const int open_errno = -PTR_ERR(myfile); + printk("%s(): ERROR opening file(%s) with errno = %d! \n", + __func__, dev->_audiofilename, open_errno); + return PTR_ERR(myfile); + } else { + if (!(myfile->f_op)) { + printk("%s: File has no file operations registered! \n", + __func__); + filp_close(myfile, NULL); + return -EIO; + } + + if (!myfile->f_op->read) { + printk("%s: File has no READ operations registered! \n", + __func__); + filp_close(myfile, NULL); + return -EIO; + } + + pos = myfile->f_pos; + old_fs = get_fs(); + set_fs(KERNEL_DS); + + for (j = 0; j < NUM_AUDIO_FRAMES; j++) { + for (i = 0; i < dev->_audio_lines_count; i++) { + pos = offset; + + vfs_read_retval = + vfs_read(myfile, mybuf, line_size, &pos); + + if (vfs_read_retval > 0 + && vfs_read_retval == line_size + && dev->_audiodata_buf_virt_addr != NULL) { + memcpy((void *)(dev-> + _audiodata_buf_virt_addr + + offset / 4), mybuf, + vfs_read_retval); + } + + offset += vfs_read_retval; + + if (vfs_read_retval < line_size) { + printk(KERN_INFO + "Done: exit %s() since no more bytes to read from Audio file.\n", + __func__); + break; + } + } + + if (i > 0) { + dev->_audioframe_count++; + } + + if (vfs_read_retval < line_size) { + break; + } + } + + dev->_audiofile_status = + (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE; + + set_fs(old_fs); + myfile->f_pos = 0; + filp_close(myfile, NULL); + } + + return 0; +} + +static int cx25821_audio_upstream_buffer_prepare(struct cx25821_dev *dev, + struct sram_channel *sram_ch, + int bpl) +{ + int ret = 0; + dma_addr_t dma_addr; + dma_addr_t data_dma_addr; + + cx25821_free_memory_audio(dev); + + dev->_risc_virt_addr = + pci_alloc_consistent(dev->pci, dev->audio_upstream_riscbuf_size, + &dma_addr); + dev->_risc_virt_start_addr = dev->_risc_virt_addr; + dev->_risc_phys_start_addr = dma_addr; + dev->_risc_phys_addr = dma_addr; + dev->_audiorisc_size = dev->audio_upstream_riscbuf_size; + + if (!dev->_risc_virt_addr) { + printk + ("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for RISC program! Returning.\n"); + return -ENOMEM; + } + //Clear out memory at address + memset(dev->_risc_virt_addr, 0, dev->_audiorisc_size); + + //For Audio Data buffer allocation + dev->_audiodata_buf_virt_addr = + pci_alloc_consistent(dev->pci, dev->audio_upstream_databuf_size, + &data_dma_addr); + dev->_audiodata_buf_phys_addr = data_dma_addr; + dev->_audiodata_buf_size = dev->audio_upstream_databuf_size; + + if (!dev->_audiodata_buf_virt_addr) { + printk + ("cx25821 ERROR: pci_alloc_consistent() FAILED to allocate memory for data buffer! Returning. \n"); + return -ENOMEM; + } + //Clear out memory at address + memset(dev->_audiodata_buf_virt_addr, 0, dev->_audiodata_buf_size); + + ret = cx25821_openfile_audio(dev, sram_ch); + if (ret < 0) + return ret; + + //Creating RISC programs + ret = + cx25821_risc_buffer_upstream_audio(dev, dev->pci, bpl, + dev->_audio_lines_count); + if (ret < 0) { + printk(KERN_DEBUG + "cx25821 ERROR creating audio upstream RISC programs! \n"); + goto error; + } + + return 0; + + error: + return ret; +} + +int cx25821_audio_upstream_irq(struct cx25821_dev *dev, int chan_num, + u32 status) +{ + int i = 0; + u32 int_msk_tmp; + struct sram_channel *channel = &dev->sram_channels[chan_num]; + dma_addr_t risc_phys_jump_addr; + __le32 *rp; + + if (status & FLD_AUD_SRC_RISCI1) { + //Get interrupt_index of the program that interrupted + u32 prog_cnt = cx_read(channel->gpcnt); + + //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers + cx_write(channel->int_msk, 0); + cx_write(channel->int_stat, cx_read(channel->int_stat)); + + spin_lock(&dev->slock); + + while (prog_cnt != dev->_last_index_irq) { + //Update _last_index_irq + if (dev->_last_index_irq < (NUMBER_OF_PROGRAMS - 1)) { + dev->_last_index_irq++; + } else { + dev->_last_index_irq = 0; + } + + dev->_audioframe_index = dev->_last_index_irq; + + queue_work(dev->_irq_audio_queues, + &dev->_audio_work_entry); + } + + if (dev->_is_first_audio_frame) { + dev->_is_first_audio_frame = 0; + + if (dev->_risc_virt_start_addr != NULL) { + risc_phys_jump_addr = + dev->_risc_phys_start_addr + + RISC_SYNC_INSTRUCTION_SIZE + + AUDIO_RISC_DMA_BUF_SIZE; + + rp = cx25821_risc_field_upstream_audio(dev, + dev-> + _risc_virt_start_addr + + 1, + dev-> + _audiodata_buf_phys_addr, + AUDIO_LINE_SIZE, + FIFO_DISABLE); + + if (USE_RISC_NOOP_AUDIO) { + for (i = 0; i < NUM_NO_OPS; i++) { + *(rp++) = + cpu_to_le32(RISC_NOOP); + } + } + // Jump to 2nd Audio Frame + *(rp++) = + cpu_to_le32(RISC_JUMP | RISC_IRQ1 | + RISC_CNT_RESET); + *(rp++) = cpu_to_le32(risc_phys_jump_addr); + *(rp++) = cpu_to_le32(0); + } + } + + spin_unlock(&dev->slock); + } else { + if (status & FLD_AUD_SRC_OF) + printk("%s: Audio Received Overflow Error Interrupt!\n", + __func__); + + if (status & FLD_AUD_SRC_SYNC) + printk("%s: Audio Received Sync Error Interrupt!\n", + __func__); + + if (status & FLD_AUD_SRC_OPC_ERR) + printk("%s: Audio Received OpCode Error Interrupt!\n", + __func__); + + // Read and write back the interrupt status register to clear our bits + cx_write(channel->int_stat, cx_read(channel->int_stat)); + } + + if (dev->_audiofile_status == END_OF_FILE) { + printk("cx25821: EOF Channel Audio Framecount = %d\n", + dev->_audioframe_count); + return -1; + } + //ElSE, set the interrupt mask register, re-enable irq. + int_msk_tmp = cx_read(channel->int_msk); + cx_write(channel->int_msk, int_msk_tmp |= _intr_msk); + + return 0; +} + +static irqreturn_t cx25821_upstream_irq_audio(int irq, void *dev_id) +{ + struct cx25821_dev *dev = dev_id; + u32 msk_stat, audio_status; + int handled = 0; + struct sram_channel *sram_ch; + + if (!dev) + return -1; + + sram_ch = &dev->sram_channels[dev->_audio_upstream_channel_select]; + + msk_stat = cx_read(sram_ch->int_mstat); + audio_status = cx_read(sram_ch->int_stat); + + // Only deal with our interrupt + if (audio_status) { + handled = + cx25821_audio_upstream_irq(dev, + dev-> + _audio_upstream_channel_select, + audio_status); + } + + if (handled < 0) { + cx25821_stop_upstream_audio(dev); + } else { + handled += handled; + } + + return IRQ_RETVAL(handled); +} + +static void cx25821_wait_fifo_enable(struct cx25821_dev *dev, + struct sram_channel *sram_ch) +{ + int count = 0; + u32 tmp; + + do { + //Wait 10 microsecond before checking to see if the FIFO is turned ON. + udelay(10); + + tmp = cx_read(sram_ch->dma_ctl); + + if (count++ > 1000) //10 millisecond timeout + { + printk + ("cx25821 ERROR: %s() fifo is NOT turned on. Timeout!\n", + __func__); + return; + } + + } while (!(tmp & sram_ch->fld_aud_fifo_en)); + +} + +int cx25821_start_audio_dma_upstream(struct cx25821_dev *dev, + struct sram_channel *sram_ch) +{ + u32 tmp = 0; + int err = 0; + + // Set the physical start address of the RISC program in the initial program counter(IPC) member of the CMDS. + cx_write(sram_ch->cmds_start + 0, dev->_risc_phys_addr); + cx_write(sram_ch->cmds_start + 4, 0); /* Risc IPC High 64 bits 63-32 */ + + /* reset counter */ + cx_write(sram_ch->gpcnt_ctl, 3); + + //Set the line length (It looks like we do not need to set the line length) + cx_write(sram_ch->aud_length, AUDIO_LINE_SIZE & FLD_AUD_DST_LN_LNGTH); + + //Set the input mode to 16-bit + tmp = cx_read(sram_ch->aud_cfg); + tmp |= + FLD_AUD_SRC_ENABLE | FLD_AUD_DST_PK_MODE | FLD_AUD_CLK_ENABLE | + FLD_AUD_MASTER_MODE | FLD_AUD_CLK_SELECT_PLL_D | FLD_AUD_SONY_MODE; + cx_write(sram_ch->aud_cfg, tmp); + + // Read and write back the interrupt status register to clear it + tmp = cx_read(sram_ch->int_stat); + cx_write(sram_ch->int_stat, tmp); + + // Clear our bits from the interrupt status register. + cx_write(sram_ch->int_stat, _intr_msk); + + //Set the interrupt mask register, enable irq. + cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << sram_ch->irq_bit)); + tmp = cx_read(sram_ch->int_msk); + cx_write(sram_ch->int_msk, tmp |= _intr_msk); + + err = + request_irq(dev->pci->irq, cx25821_upstream_irq_audio, + IRQF_SHARED | IRQF_DISABLED, dev->name, dev); + if (err < 0) { + printk(KERN_ERR "%s: can't get upstream IRQ %d\n", dev->name, + dev->pci->irq); + goto fail_irq; + } + + // Start the DMA engine + tmp = cx_read(sram_ch->dma_ctl); + cx_set(sram_ch->dma_ctl, tmp | sram_ch->fld_aud_risc_en); + + dev->_audio_is_running = 1; + dev->_is_first_audio_frame = 1; + + // The fifo_en bit turns on by the first Risc program + cx25821_wait_fifo_enable(dev, sram_ch); + + return 0; + + fail_irq: + cx25821_dev_unregister(dev); + return err; +} + +int cx25821_audio_upstream_init(struct cx25821_dev *dev, int channel_select) +{ + struct sram_channel *sram_ch; + int retval = 0; + int err = 0; + int str_length = 0; + + if (dev->_audio_is_running) { + printk("Audio Channel is still running so return!\n"); + return 0; + } + + dev->_audio_upstream_channel_select = channel_select; + sram_ch = &dev->sram_channels[channel_select]; + + //Work queue + INIT_WORK(&dev->_audio_work_entry, cx25821_audioups_handler); + dev->_irq_audio_queues = + create_singlethread_workqueue("cx25821_audioworkqueue"); + + if (!dev->_irq_audio_queues) { + printk + ("cx25821 ERROR: create_singlethread_workqueue() for Audio FAILED!\n"); + return -ENOMEM; + } + + dev->_last_index_irq = 0; + dev->_audio_is_running = 0; + dev->_audioframe_count = 0; + dev->_audiofile_status = RESET_STATUS; + dev->_audio_lines_count = LINES_PER_AUDIO_BUFFER; + _line_size = AUDIO_LINE_SIZE; + + if (dev->input_audiofilename) { + str_length = strlen(dev->input_audiofilename); + dev->_audiofilename = + (char *)kmalloc(str_length + 1, GFP_KERNEL); + + if (!dev->_audiofilename) + goto error; + + memcpy(dev->_audiofilename, dev->input_audiofilename, + str_length + 1); + + //Default if filename is empty string + if (strcmp(dev->input_audiofilename, "") == 0) { + dev->_audiofilename = "/root/audioGOOD.wav"; + } + } else { + str_length = strlen(_defaultAudioName); + dev->_audiofilename = + (char *)kmalloc(str_length + 1, GFP_KERNEL); + + if (!dev->_audiofilename) + goto error; + + memcpy(dev->_audiofilename, _defaultAudioName, str_length + 1); + } + + retval = + cx25821_sram_channel_setup_upstream_audio(dev, sram_ch, _line_size, + 0); + + dev->audio_upstream_riscbuf_size = + AUDIO_RISC_DMA_BUF_SIZE * NUM_AUDIO_PROGS + + RISC_SYNC_INSTRUCTION_SIZE; + dev->audio_upstream_databuf_size = AUDIO_DATA_BUF_SZ * NUM_AUDIO_PROGS; + + //Allocating buffers and prepare RISC program + retval = + cx25821_audio_upstream_buffer_prepare(dev, sram_ch, _line_size); + if (retval < 0) { + printk(KERN_ERR + "%s: Failed to set up Audio upstream buffers!\n", + dev->name); + goto error; + } + //Start RISC engine + cx25821_start_audio_dma_upstream(dev, sram_ch); + + return 0; + + error: + cx25821_dev_unregister(dev); + + return err; +} |