diff options
| author | Mauro Carvalho Chehab | 2009-09-15 16:33:54 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2009-09-19 04:47:36 +0200 |
| commit | 02b20b0b4cde011f7ad6b5363fb88b93f7ad4e5b (patch) | |
| tree | de8dbf798a2867a58d2108684e1aef76ec9bbfc0 /drivers/staging/cx25821/cx25821-audio-upstream.c | |
| parent | Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/k... (diff) | |
| download | kernel-qcow2-linux-02b20b0b4cde011f7ad6b5363fb88b93f7ad4e5b.tar.gz kernel-qcow2-linux-02b20b0b4cde011f7ad6b5363fb88b93f7ad4e5b.tar.xz kernel-qcow2-linux-02b20b0b4cde011f7ad6b5363fb88b93f7ad4e5b.zip | |
V4L/DVB (12730): Add conexant cx25821 driver
GIT_BRANCH=devel
GIT_AUTHOR_DATE=1252851239
GIT_AUTHOR_NAME=Palash Bandyopadhyay
GIT_AUTHOR_EMAIL=Palash.Bandyopadhyay@conexant.com
Add conexant cx25821 driver release v106 of the Athena driver.
Signed-off-by: Palash Bandyopadhyay <palash.bandyopadhyay@conexant.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/staging/cx25821/cx25821-audio-upstream.c')
| -rw-r--r-- | drivers/staging/cx25821/cx25821-audio-upstream.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/drivers/staging/cx25821/cx25821-audio-upstream.c b/drivers/staging/cx25821/cx25821-audio-upstream.c new file mode 100644 index 000000000000..9138767e4d7c --- /dev/null +++ b/drivers/staging/cx25821/cx25821-audio-upstream.c @@ -0,0 +1,825 @@ +/*
+ * 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;
+}
+ |