diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-15 11:33:54 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-18 23:47:36 -0300 |
commit | 02b20b0b4cde011f7ad6b5363fb88b93f7ad4e5b (patch) | |
tree | de8dbf798a2867a58d2108684e1aef76ec9bbfc0 /drivers/staging/cx25821/cx25821-video-upstream-ch2.c | |
parent | 78f28b7c555359c67c2a0d23f7436e915329421e (diff) |
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-video-upstream-ch2.c')
-rw-r--r-- | drivers/staging/cx25821/cx25821-video-upstream-ch2.c | 847 |
1 files changed, 847 insertions, 0 deletions
diff --git a/drivers/staging/cx25821/cx25821-video-upstream-ch2.c b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c new file mode 100644 index 00000000000..ca91b832b01 --- /dev/null +++ b/drivers/staging/cx25821/cx25821-video-upstream-ch2.c @@ -0,0 +1,847 @@ +/*
+ * 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-video-upstream-ch2.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 <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_VID_SRC_RISC1 | FLD_VID_SRC_UF | FLD_VID_SRC_SYNC | FLD_VID_SRC_OPC_ERR;
+
+
+static __le32 *cx25821_update_riscprogram_ch2( struct cx25821_dev *dev,
+ __le32 *rp, unsigned int offset, unsigned int bpl,
+ u32 sync_line, unsigned int lines, int fifo_enable, int field_type)
+{
+ unsigned int line, i;
+ int dist_betwn_starts = bpl * 2;
+
+
+ *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
+
+
+ if( USE_RISC_NOOP_VIDEO )
+ {
+ for( i = 0; i < NUM_NO_OPS; i++ )
+ {
+ *(rp++) = cpu_to_le32(RISC_NOOP);
+ }
+ }
+
+ /* scan lines */
+ for (line = 0; line < lines; line++)
+ {
+ *(rp++) = cpu_to_le32(RISC_READ|RISC_SOL|RISC_EOL|bpl);
+ *(rp++) = cpu_to_le32(dev->_data_buf_phys_addr_ch2+offset);
+ *(rp++) = cpu_to_le32(0); /* bits 63-32 */
+
+ if ( (lines <= NTSC_FIELD_HEIGHT) || (line < (NTSC_FIELD_HEIGHT-1)) || !(dev->_isNTSC_ch2) )
+ {
+ offset += dist_betwn_starts;
+ }
+ }
+
+ return rp;
+}
+
+static __le32 *cx25821_risc_field_upstream_ch2( struct cx25821_dev *dev,
+ __le32 *rp,
+ dma_addr_t databuf_phys_addr,
+ unsigned int offset, u32 sync_line, unsigned int bpl,
+ unsigned int lines, int fifo_enable, int field_type)
+{
+ unsigned int line, i;
+ struct sram_channel *sram_ch = &dev->sram_channels[dev->_channel2_upstream_select];
+ int dist_betwn_starts = bpl * 2;
+
+
+ /* sync instruction */
+ if (sync_line != NO_SYNC_LINE)
+ {
+ *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
+ }
+
+
+ if( USE_RISC_NOOP_VIDEO )
+ {
+ for( i = 0; i < NUM_NO_OPS; i++ )
+ {
+ *(rp++) = cpu_to_le32(RISC_NOOP);
+ }
+ }
+
+ /* scan lines */
+ for (line = 0; line < lines; 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 */
+
+
+ if ( (lines <= NTSC_FIELD_HEIGHT) || (line < (NTSC_FIELD_HEIGHT-1)) || !(dev->_isNTSC_ch2) )
+ {
+ offset += dist_betwn_starts;
+ }
+
+
+ // check if we need to enable the FIFO after the first 4 lines
+ // For the upstream video channel, the risc engine will enable the FIFO.
+ if ( fifo_enable && line == 3 )
+ {
+ *(rp++) = RISC_WRITECR;
+ *(rp++) = sram_ch->dma_ctl;
+ *(rp++) = FLD_VID_FIFO_EN;
+ *(rp++) = 0x00000001;
+ }
+ }
+
+ return rp;
+}
+
+int cx25821_risc_buffer_upstream_ch2( struct cx25821_dev *dev, struct pci_dev *pci,
+ unsigned int top_offset,
+ unsigned int bpl, unsigned int lines)
+{
+ __le32 *rp;
+ int fifo_enable = 0;
+ int singlefield_lines = lines >> 1; //get line count for single field
+ int odd_num_lines = singlefield_lines;
+ int frame = 0;
+ int frame_size = 0;
+ int databuf_offset = 0;
+ int risc_program_size = 0;
+ int risc_flag = RISC_CNT_RESET;
+ unsigned int bottom_offset = bpl;
+ dma_addr_t risc_phys_jump_addr;
+
+
+ if( dev->_isNTSC_ch2 )
+ {
+ odd_num_lines = singlefield_lines + 1;
+ risc_program_size = FRAME1_VID_PROG_SIZE;
+ frame_size = (bpl == Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 : FRAME_SIZE_NTSC_Y422;
+ }
+ else
+ {
+ risc_program_size = PAL_VID_PROG_SIZE;
+ frame_size = (bpl == Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
+ }
+
+
+ /* Virtual address of Risc buffer program */
+ rp = dev->_dma_virt_addr_ch2;
+
+ for( frame = 0; frame < NUM_FRAMES; frame++ )
+ {
+ databuf_offset = frame_size * frame;
+
+
+ if (UNSET != top_offset)
+ {
+ fifo_enable = (frame == 0) ? FIFO_ENABLE : FIFO_DISABLE;
+ rp = cx25821_risc_field_upstream_ch2(dev, rp, dev->_data_buf_phys_addr_ch2 + databuf_offset, top_offset, 0, bpl, odd_num_lines, fifo_enable, ODD_FIELD);
+ }
+
+ fifo_enable = FIFO_DISABLE;
+
+
+ //Even field
+ rp = cx25821_risc_field_upstream_ch2(dev, rp, dev->_data_buf_phys_addr_ch2 + databuf_offset, bottom_offset, 0x200, bpl, singlefield_lines, fifo_enable, EVEN_FIELD);
+
+
+ if( frame == 0 )
+ {
+ risc_flag = RISC_CNT_RESET;
+ risc_phys_jump_addr = dev->_dma_phys_start_addr_ch2 + risc_program_size;
+ }
+ else
+ {
+ risc_flag = RISC_CNT_INC;
+ risc_phys_jump_addr = dev->_dma_phys_start_addr_ch2;
+ }
+
+
+ // Loop to 2ndFrameRISC 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);
+ }
+
+ return 0;
+}
+
+
+void cx25821_stop_upstream_video_ch2(struct cx25821_dev *dev)
+{
+ struct sram_channel *sram_ch = &dev->sram_channels[VID_UPSTREAM_SRAM_CHANNEL_J];
+ u32 tmp = 0;
+
+ if( !dev->_is_running_ch2 )
+ {
+ printk("cx25821: No video file is currently running so return!\n");
+ return;
+ }
+
+ //Disable RISC interrupts
+ tmp = cx_read( sram_ch->int_msk );
+ cx_write( sram_ch->int_msk, tmp & ~_intr_msk);
+
+ //Turn OFF risc and fifo
+ tmp = cx_read( sram_ch->dma_ctl );
+ cx_write( sram_ch->dma_ctl, tmp & ~(FLD_VID_FIFO_EN | FLD_VID_RISC_EN) );
+
+ //Clear data buffer memory
+ if( dev->_data_buf_virt_addr_ch2 )
+ memset( dev->_data_buf_virt_addr_ch2, 0, dev->_data_buf_size_ch2 );
+
+ dev->_is_running_ch2 = 0;
+ dev->_is_first_frame_ch2 = 0;
+ dev->_frame_count_ch2 = 0;
+ dev->_file_status_ch2 = END_OF_FILE;
+
+ if( dev->_irq_queues_ch2 )
+ {
+ kfree(dev->_irq_queues_ch2);
+ dev->_irq_queues_ch2 = NULL;
+ }
+
+ if( dev->_filename_ch2 != NULL )
+ kfree(dev->_filename_ch2);
+
+ tmp = cx_read( VID_CH_MODE_SEL );
+ cx_write( VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
+}
+
+void cx25821_free_mem_upstream_ch2(struct cx25821_dev *dev)
+{
+ if( dev->_is_running_ch2 )
+ {
+ cx25821_stop_upstream_video_ch2(dev);
+ }
+
+ if (dev->_dma_virt_addr_ch2)
+ {
+ pci_free_consistent(dev->pci, dev->_risc_size_ch2, dev->_dma_virt_addr_ch2, dev->_dma_phys_addr_ch2);
+ dev->_dma_virt_addr_ch2 = NULL;
+ }
+
+ if (dev->_data_buf_virt_addr_ch2)
+ {
+ pci_free_consistent(dev->pci, dev->_data_buf_size_ch2, dev->_data_buf_virt_addr_ch2, dev->_data_buf_phys_addr_ch2);
+ dev->_data_buf_virt_addr_ch2 = NULL;
+ }
+}
+
+
+int cx25821_get_frame_ch2(struct cx25821_dev *dev, struct sram_channel *sram_ch )
+{
+ struct file * myfile;
+ int frame_index_temp = dev->_frame_index_ch2;
+ int i = 0;
+ int line_size = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
+ int frame_size = 0;
+ int frame_offset = 0;
+ ssize_t vfs_read_retval = 0;
+ char mybuf[line_size];
+ loff_t file_offset;
+ loff_t pos;
+ mm_segment_t old_fs;
+
+
+ if( dev->_file_status_ch2 == END_OF_FILE )
+ return 0;
+
+ if( dev->_isNTSC_ch2 )
+ {
+ frame_size = (line_size == Y411_LINE_SZ) ? FRAME_SIZE_NTSC_Y411 : FRAME_SIZE_NTSC_Y422;
+ }
+ else
+ {
+ frame_size = (line_size == Y411_LINE_SZ) ? FRAME_SIZE_PAL_Y411 : FRAME_SIZE_PAL_Y422;
+ }
+
+ frame_offset = (frame_index_temp > 0) ? frame_size : 0;
+ file_offset = dev->_frame_count_ch2 * frame_size;
+
+
+ myfile = filp_open( dev->_filename_ch2, 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->_filename_ch2, open_errno);
+ return PTR_ERR(myfile);
+ }
+ else
+ {
+ if( !(myfile->f_op) )
+ {
+ printk("%s: File has no file operations registered!", __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+
+ if( !myfile->f_op->read )
+ {
+ printk("%s: File has no READ operations registered!", __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ pos = myfile->f_pos;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+
+
+ for( i = 0; i < dev->_lines_count_ch2; 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->_data_buf_virt_addr_ch2 != NULL )
+ {
+ memcpy( (void*)(dev->_data_buf_virt_addr_ch2+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 Video file.\n", __func__ );
+ break;
+ }
+ }
+
+ if( i > 0 )
+ dev->_frame_count_ch2++;
+
+ dev->_file_status_ch2 = (vfs_read_retval == line_size) ? IN_PROGRESS : END_OF_FILE;
+
+
+ set_fs(old_fs);
+ filp_close(myfile, NULL);
+ }
+
+ return 0;
+}
+
+static void cx25821_vidups_handler_ch2(struct work_struct *work)
+{
+ struct cx25821_dev *dev = container_of(work, struct cx25821_dev, _irq_work_entry_ch2);
+
+ if( !dev )
+ {
+ printk("ERROR %s(): since container_of(work_struct) FAILED! \n", __func__ );
+ return;
+ }
+
+ cx25821_get_frame_ch2( dev, &dev->sram_channels[dev->_channel2_upstream_select] );
+}
+
+
+int cx25821_openfile_ch2(struct cx25821_dev *dev, struct sram_channel *sram_ch)
+{
+ struct file * myfile;
+ int i = 0, j = 0;
+ int line_size = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
+ 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->_filename_ch2, 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->_filename_ch2, open_errno);
+ return PTR_ERR(myfile);
+ }
+ else
+ {
+ if( !(myfile->f_op) )
+ {
+ printk("%s: File has no file operations registered!", __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+
+ if( !myfile->f_op->read )
+ {
+ printk("%s: File has no READ operations registered! Returning.", __func__);
+ filp_close(myfile, NULL);
+ return -EIO;
+ }
+
+ pos = myfile->f_pos;
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+
+
+ for( j = 0; j < NUM_FRAMES; j++ )
+ {
+ for( i = 0; i < dev->_lines_count_ch2; i++ )
+ {
+ pos = offset;
+
+ vfs_read_retval = vfs_read(myfile, mybuf, line_size, &pos);
+
+ if( vfs_read_retval > 0 && vfs_read_retval == line_size && dev->_data_buf_virt_addr_ch2 != NULL )
+ {
+ memcpy( (void*)(dev->_data_buf_virt_addr_ch2+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 Video file.\n", __func__ );
+ break;
+ }
+ }
+
+ if( i > 0 )
+ dev->_frame_count_ch2++;
+
+ if( vfs_read_retval < line_size )
+ {
+ break;
+ }
+ }
+
+ dev->_file_status_ch2 = (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_upstream_buffer_prepare_ch2(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;
+
+
+ if( dev->_dma_virt_addr_ch2 != NULL )
+ {
+ pci_free_consistent(dev->pci, dev->upstream_riscbuf_size_ch2, dev->_dma_virt_addr_ch2, dev->_dma_phys_addr_ch2);
+ }
+
+ dev->_dma_virt_addr_ch2 = pci_alloc_consistent(dev->pci, dev->upstream_riscbuf_size_ch2, &dma_addr);
+ dev->_dma_virt_start_addr_ch2 = dev->_dma_virt_addr_ch2;
+ dev->_dma_phys_start_addr_ch2 = dma_addr;
+ dev->_dma_phys_addr_ch2 = dma_addr;
+ dev->_risc_size_ch2 = dev->upstream_riscbuf_size_ch2;
+
+
+ if (!dev->_dma_virt_addr_ch2)
+ {
+ printk("cx25821: FAILED to allocate memory for Risc buffer! Returning.\n");
+ return -ENOMEM;
+ }
+
+
+ //Iniitize at this address until n bytes to 0
+ memset( dev->_dma_virt_addr_ch2, 0, dev->_risc_size_ch2 );
+
+
+ if( dev->_data_buf_virt_addr_ch2 != NULL )
+ {
+ pci_free_consistent(dev->pci, dev->upstream_databuf_size_ch2, dev->_data_buf_virt_addr_ch2, dev->_data_buf_phys_addr_ch2);
+ }
+
+ //For Video Data buffer allocation
+ dev->_data_buf_virt_addr_ch2 = pci_alloc_consistent(dev->pci, dev->upstream_databuf_size_ch2, &data_dma_addr);
+ dev->_data_buf_phys_addr_ch2 = data_dma_addr;
+ dev->_data_buf_size_ch2 = dev->upstream_databuf_size_ch2;
+
+ if (!dev->_data_buf_virt_addr_ch2)
+ {
+ printk("cx25821: FAILED to allocate memory for data buffer! Returning.\n");
+ return -ENOMEM;
+ }
+
+
+ //Initialize at this address until n bytes to 0
+ memset( dev->_data_buf_virt_addr_ch2, 0, dev->_data_buf_size_ch2 );
+
+
+ ret = cx25821_openfile_ch2(dev, sram_ch);
+ if( ret < 0 )
+ return ret;
+
+
+ //Creating RISC programs
+ ret = cx25821_risc_buffer_upstream_ch2(dev, dev->pci, 0, bpl, dev->_lines_count_ch2 );
+ if (ret < 0)
+ {
+ printk(KERN_INFO "cx25821: Failed creating Video Upstream Risc programs! \n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ return ret;
+}
+
+int cx25821_video_upstream_irq_ch2(struct cx25821_dev *dev, int chan_num, u32 status)
+{
+ u32 int_msk_tmp;
+ struct sram_channel *channel = &dev->sram_channels[chan_num];
+ int singlefield_lines = NTSC_FIELD_HEIGHT;
+ int line_size_in_bytes = Y422_LINE_SZ;
+ int odd_risc_prog_size = 0;
+ dma_addr_t risc_phys_jump_addr;
+ __le32 * rp;
+
+
+
+ if (status & FLD_VID_SRC_RISC1)
+ {
+ // We should only process one program per call
+ u32 prog_cnt = cx_read( channel->gpcnt );
+
+ //Since we've identified our IRQ, clear our bits from the interrupt mask and interrupt status registers
+ int_msk_tmp = cx_read(channel->int_msk);
+ cx_write(channel->int_msk, int_msk_tmp & ~_intr_msk);
+ cx_write( channel->int_stat, _intr_msk );
+
+ spin_lock(&dev->slock);
+
+ dev->_frame_index_ch2 = prog_cnt;
+
+ queue_work(dev->_irq_queues_ch2, &dev->_irq_work_entry_ch2);
+
+
+ if ( dev->_is_first_frame_ch2 )
+ {
+ dev->_is_first_frame_ch2 = 0;
+
+ if( dev->_isNTSC_ch2 )
+ {
+ singlefield_lines += 1;
+ odd_risc_prog_size = ODD_FLD_NTSC_PROG_SIZE;
+ }
+ else
+ {
+ singlefield_lines = PAL_FIELD_HEIGHT;
+ odd_risc_prog_size = ODD_FLD_PAL_PROG_SIZE;
+ }
+
+
+ if( dev->_dma_virt_start_addr_ch2 != NULL )
+ {
+ line_size_in_bytes = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ? Y411_LINE_SZ : Y422_LINE_SZ;
+ risc_phys_jump_addr = dev->_dma_phys_start_addr_ch2 + odd_risc_prog_size;
+
+ rp = cx25821_update_riscprogram_ch2(dev, dev->_dma_virt_start_addr_ch2, TOP_OFFSET, line_size_in_bytes, 0x0, singlefield_lines, FIFO_DISABLE, ODD_FIELD);
+
+ // Jump to Even Risc program of 1st Frame
+ *(rp++) = cpu_to_le32(RISC_JUMP);
+ *(rp++) = cpu_to_le32(risc_phys_jump_addr);
+ *(rp++) = cpu_to_le32(0);
+ }
+ }
+
+ spin_unlock(&dev->slock);
+ }
+
+
+ if( dev->_file_status_ch2 == END_OF_FILE )
+ {
+ printk("cx25821: EOF Channel 2 Framecount = %d\n", dev->_frame_count_ch2 );
+ 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_ch2(int irq, void *dev_id)
+{
+ struct cx25821_dev *dev = dev_id;
+ u32 msk_stat, vid_status;
+ int handled = 0;
+ int channel_num = 0;
+ struct sram_channel *sram_ch;
+
+
+ if( !dev )
+ return -1;
+
+ channel_num = VID_UPSTREAM_SRAM_CHANNEL_J;
+
+ sram_ch = &dev->sram_channels[channel_num];
+
+ msk_stat = cx_read(sram_ch->int_mstat);
+ vid_status = cx_read(sram_ch->int_stat);
+
+ // Only deal with our interrupt
+ if(vid_status)
+ {
+ handled = cx25821_video_upstream_irq_ch2(dev, channel_num, vid_status);
+ }
+
+
+ if( handled < 0 )
+ {
+ cx25821_stop_upstream_video_ch2(dev);
+ }
+ else
+ {
+ handled += handled;
+ }
+
+ return IRQ_RETVAL(handled);
+}
+
+
+static void cx25821_set_pixelengine_ch2(struct cx25821_dev *dev, struct sram_channel *ch, int pix_format)
+{
+ int width = WIDTH_D1;
+ int height = dev->_lines_count_ch2;
+ int num_lines, odd_num_lines;
+ u32 value;
+ int vip_mode = PIXEL_ENGINE_VIP1;
+
+
+ value = ( (pix_format & 0x3) << 12 ) | ( vip_mode & 0x7 );
+ value &= 0xFFFFFFEF;
+ value |= dev->_isNTSC_ch2 ? 0 : 0x10;
+ cx_write( ch->vid_fmt_ctl, value );
+
+ // set number of active pixels in each line. Default is 720 pixels in both NTSC and PAL format
+ cx_write( ch->vid_active_ctl1, width );
+
+ num_lines = (height / 2) & 0x3FF;
+ odd_num_lines = num_lines;
+
+ if(dev->_isNTSC_ch2)
+ {
+ odd_num_lines += 1;
+ }
+
+ value = (num_lines << 16) | odd_num_lines;
+
+ // set number of active lines in field 0 (top) and field 1 (bottom)
+ cx_write( ch->vid_active_ctl2, value );
+
+ cx_write( ch->vid_cdt_size, VID_CDT_SIZE >> 3 );
+}
+
+
+int cx25821_start_video_dma_upstream_ch2(struct cx25821_dev *dev,
+ struct sram_channel *sram_ch)
+{
+ u32 tmp = 0;
+ int err = 0;
+
+
+ // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
+ tmp = cx_read( VID_CH_MODE_SEL );
+ cx_write( VID_CH_MODE_SEL, tmp | 0x1B0001FF);
+
+
+ // 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->_dma_phys_addr_ch2);
+ cx_write(sram_ch->cmds_start + 4, 0); /* Risc IPC High 64 bits 63-32 */
+
+ /* reset counter */
+ cx_write(sram_ch->gpcnt_ctl, 3);
+
+ // 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_ch2, 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 | FLD_VID_RISC_EN );
+
+ dev->_is_running_ch2 = 1;
+ dev->_is_first_frame_ch2 = 1;
+
+ return 0;
+
+
+fail_irq:
+ cx25821_dev_unregister(dev);
+ return err;
+}
+
+
+int cx25821_vidupstream_init_ch2(struct cx25821_dev *dev, int channel_select, int pixel_format)
+{
+ struct sram_channel *sram_ch;
+ u32 tmp;
+ int retval = 0;
+ int err = 0;
+ int data_frame_size = 0;
+ int risc_buffer_size = 0;
+ int str_length = 0;
+
+ if( dev->_is_running_ch2 )
+ {
+ printk("Video Channel is still running so return!\n");
+ return 0;
+ }
+
+ dev->_channel2_upstream_select = channel_select;
+ sram_ch = &dev->sram_channels[channel_select];
+
+
+ INIT_WORK(&dev->_irq_work_entry_ch2, cx25821_vidups_handler_ch2);
+ dev->_irq_queues_ch2 = create_singlethread_workqueue("cx25821_workqueue2");
+
+ if(!dev->_irq_queues_ch2)
+ {
+ printk("cx25821: create_singlethread_workqueue() for Video FAILED!\n");
+ return -ENOMEM;
+ }
+
+ // 656/VIP SRC Upstream Channel I & J and 7 - Host Bus Interface for channel A-C
+ tmp = cx_read( VID_CH_MODE_SEL );
+ cx_write( VID_CH_MODE_SEL, tmp | 0x1B0001FF);
+
+
+ dev->_is_running_ch2 = 0;
+ dev->_frame_count_ch2 = 0;
+ dev->_file_status_ch2 = RESET_STATUS;
+ dev->_lines_count_ch2 = dev->_isNTSC_ch2 ? 480 : 576;
+ dev->_pixel_format_ch2 = pixel_format;
+ dev->_line_size_ch2 = (dev->_pixel_format_ch2 == PIXEL_FRMT_422) ? (WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
+ data_frame_size = dev->_isNTSC_ch2 ? NTSC_DATA_BUF_SZ : PAL_DATA_BUF_SZ;
+ risc_buffer_size = dev->_isNTSC_ch2 ? NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
+
+
+ if( dev->input_filename_ch2 )
+ {
+ str_length = strlen(dev->input_filename_ch2);
+ dev->_filename_ch2 = (char *) kmalloc(str_length + 1, GFP_KERNEL);
+
+ if( !dev->_filename_ch2 )
+ goto error;
+
+ memcpy(dev->_filename_ch2, dev->input_filename_ch2, str_length + 1);
+ }
+ else
+ {
+ str_length = strlen(dev->_defaultname_ch2);
+ dev->_filename_ch2 = (char *) kmalloc(str_length + 1, GFP_KERNEL);
+
+ if( !dev->_filename_ch2 )
+ goto error;
+
+ memcpy(dev->_filename_ch2, dev->_defaultname_ch2, str_length + 1);
+ }
+
+
+ //Default if filename is empty string
+ if( strcmp(dev->input_filename_ch2,"") == 0)
+ {
+ if( dev->_isNTSC_ch2 )
+ {
+ dev->_filename_ch2 = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ? "/root/vid411.yuv" : "/root/vidtest.yuv";
+ }
+ else
+ {
+ dev->_filename_ch2 = (dev->_pixel_format_ch2 == PIXEL_FRMT_411) ? "/root/pal411.yuv" : "/root/pal422.yuv";
+ }
+ }
+
+
+ retval = cx25821_sram_channel_setup_upstream(dev, sram_ch, dev->_line_size_ch2, 0);
+
+
+ /* setup fifo + format */
+ cx25821_set_pixelengine_ch2(dev, sram_ch, dev->_pixel_format_ch2);
+
+ dev->upstream_riscbuf_size_ch2 = risc_buffer_size * 2;
+ dev->upstream_databuf_size_ch2 = data_frame_size * 2;
+
+
+ //Allocating buffers and prepare RISC program
+ retval = cx25821_upstream_buffer_prepare_ch2(dev, sram_ch, dev->_line_size_ch2);
+ if (retval < 0)
+ {
+ printk(KERN_ERR "%s: Failed to set up Video upstream buffers!\n", dev->name);
+ goto error;
+ }
+
+
+ cx25821_start_video_dma_upstream_ch2(dev, sram_ch);
+
+ return 0;
+
+error:
+ cx25821_dev_unregister(dev);
+
+ return err;
+}
+
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