1 files changed, 677 insertions, 0 deletions

diff --git a/kernel/drivers/media/pci/cx25821/cx25821-video-upstream.c b/kernel/drivers/media/pci/cx25821/cx25821-video-upstream.c
new file mode 100644
index 000000000..a664997e1
--- /dev/null
+++ b/kernel/drivers/media/pci/cx25821/cx25821-video-upstream.c
@@ -0,0 +1,677 @@
+/*
+ *  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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "cx25821-video.h"
+#include "cx25821-video-upstream.h"
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.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;
+
+int cx25821_sram_channel_setup_upstream(struct cx25821_dev *dev,
+					const 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 > 4)
+		lines = 4;
+
+	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, (lines * 16) >> 3);
+	cx_write(ch->cmds_start + 16, ch->ctrl_start);
+
+	cx_write(ch->cmds_start + 20, VID_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, (lines * 16) >> 3);
+	cx_write(ch->cnt1_reg, (bpl >> 3) - 1);
+
+	return 0;
+}
+
+static __le32 *cx25821_update_riscprogram(struct cx25821_channel *chan,
+					  __le32 *rp, unsigned int offset,
+					  unsigned int bpl, u32 sync_line,
+					  unsigned int lines, int fifo_enable,
+					  int field_type)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	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(out->_data_buf_phys_addr + offset);
+		*(rp++) = cpu_to_le32(0);	/* bits 63-32 */
+
+		if ((lines <= NTSC_FIELD_HEIGHT)
+		    || (line < (NTSC_FIELD_HEIGHT - 1)) || !(out->is_60hz)) {
+			offset += dist_betwn_starts;
+		}
+	}
+
+	return rp;
+}
+
+static __le32 *cx25821_risc_field_upstream(struct cx25821_channel *chan, __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)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	unsigned int line, i;
+	const struct sram_channel *sram_ch = chan->sram_channels;
+	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)) || !(out->is_60hz))
+			/* to skip the other field line */
+			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++) = cpu_to_le32(RISC_WRITECR);
+			*(rp++) = cpu_to_le32(sram_ch->dma_ctl);
+			*(rp++) = cpu_to_le32(FLD_VID_FIFO_EN);
+			*(rp++) = cpu_to_le32(0x00000001);
+		}
+	}
+
+	return rp;
+}
+
+static int cx25821_risc_buffer_upstream(struct cx25821_channel *chan,
+					struct pci_dev *pci,
+					unsigned int top_offset,
+					unsigned int bpl, unsigned int lines)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	__le32 *rp;
+	int fifo_enable = 0;
+	/* get line count for single field */
+	int singlefield_lines = lines >> 1;
+	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 (out->is_60hz) {
+		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 = out->_dma_virt_addr;
+
+	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(chan, rp,
+					out->_data_buf_phys_addr +
+					databuf_offset, top_offset, 0, bpl,
+					odd_num_lines, fifo_enable, ODD_FIELD);
+		}
+
+		fifo_enable = FIFO_DISABLE;
+
+		/* Even Field */
+		rp = cx25821_risc_field_upstream(chan, rp,
+						 out->_data_buf_phys_addr +
+						 databuf_offset, bottom_offset,
+						 0x200, bpl, singlefield_lines,
+						 fifo_enable, EVEN_FIELD);
+
+		if (frame == 0) {
+			risc_flag = RISC_CNT_RESET;
+			risc_phys_jump_addr = out->_dma_phys_start_addr +
+				risc_program_size;
+		} else {
+			risc_phys_jump_addr = out->_dma_phys_start_addr;
+			risc_flag = RISC_CNT_INC;
+		}
+
+		/* 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(struct cx25821_channel *chan)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	const struct sram_channel *sram_ch = chan->sram_channels;
+	u32 tmp = 0;
+
+	if (!out->_is_running) {
+		pr_info("No video file is currently running so return!\n");
+		return;
+	}
+
+	/* Set the interrupt mask register, disable irq. */
+	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) & ~(1 << sram_ch->irq_bit));
+
+	/* Disable RISC interrupts */
+	tmp = cx_read(sram_ch->int_msk);
+	cx_write(sram_ch->int_msk, tmp & ~_intr_msk);
+
+	/* Turn OFF risc and fifo enable */
+	tmp = cx_read(sram_ch->dma_ctl);
+	cx_write(sram_ch->dma_ctl, tmp & ~(FLD_VID_FIFO_EN | FLD_VID_RISC_EN));
+
+	free_irq(dev->pci->irq, chan);
+
+	/* Clear data buffer memory */
+	if (out->_data_buf_virt_addr)
+		memset(out->_data_buf_virt_addr, 0, out->_data_buf_size);
+
+	out->_is_running = 0;
+	out->_is_first_frame = 0;
+	out->_frame_count = 0;
+	out->_file_status = END_OF_FILE;
+
+	tmp = cx_read(VID_CH_MODE_SEL);
+	cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
+}
+
+void cx25821_free_mem_upstream(struct cx25821_channel *chan)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+
+	if (out->_is_running)
+		cx25821_stop_upstream_video(chan);
+
+	if (out->_dma_virt_addr) {
+		pci_free_consistent(dev->pci, out->_risc_size,
+				    out->_dma_virt_addr, out->_dma_phys_addr);
+		out->_dma_virt_addr = NULL;
+	}
+
+	if (out->_data_buf_virt_addr) {
+		pci_free_consistent(dev->pci, out->_data_buf_size,
+				    out->_data_buf_virt_addr,
+				    out->_data_buf_phys_addr);
+		out->_data_buf_virt_addr = NULL;
+	}
+}
+
+int cx25821_write_frame(struct cx25821_channel *chan,
+		const char __user *data, size_t count)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	int line_size = (out->_pixel_format == PIXEL_FRMT_411) ?
+		Y411_LINE_SZ : Y422_LINE_SZ;
+	int frame_size = 0;
+	int frame_offset = 0;
+	int curpos = out->curpos;
+
+	if (out->is_60hz)
+		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;
+
+	if (curpos == 0) {
+		out->cur_frame_index = out->_frame_index;
+		if (wait_event_interruptible(out->waitq, out->cur_frame_index != out->_frame_index))
+			return -EINTR;
+		out->cur_frame_index = out->_frame_index;
+	}
+
+	frame_offset = out->cur_frame_index ? frame_size : 0;
+
+	if (frame_size - curpos < count)
+		count = frame_size - curpos;
+	if (copy_from_user((__force char *)out->_data_buf_virt_addr + frame_offset + curpos,
+				data, count))
+		return -EFAULT;
+	curpos += count;
+	if (curpos == frame_size) {
+		out->_frame_count++;
+		curpos = 0;
+	}
+	out->curpos = curpos;
+
+	return count;
+}
+
+static int cx25821_upstream_buffer_prepare(struct cx25821_channel *chan,
+					   const struct sram_channel *sram_ch,
+					   int bpl)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	int ret = 0;
+	dma_addr_t dma_addr;
+	dma_addr_t data_dma_addr;
+
+	if (out->_dma_virt_addr != NULL)
+		pci_free_consistent(dev->pci, out->upstream_riscbuf_size,
+				out->_dma_virt_addr, out->_dma_phys_addr);
+
+	out->_dma_virt_addr = pci_alloc_consistent(dev->pci,
+			out->upstream_riscbuf_size, &dma_addr);
+	out->_dma_virt_start_addr = out->_dma_virt_addr;
+	out->_dma_phys_start_addr = dma_addr;
+	out->_dma_phys_addr = dma_addr;
+	out->_risc_size = out->upstream_riscbuf_size;
+
+	if (!out->_dma_virt_addr) {
+		pr_err("FAILED to allocate memory for Risc buffer! Returning\n");
+		return -ENOMEM;
+	}
+
+	/* Clear memory at address */
+	memset(out->_dma_virt_addr, 0, out->_risc_size);
+
+	if (out->_data_buf_virt_addr != NULL)
+		pci_free_consistent(dev->pci, out->upstream_databuf_size,
+				out->_data_buf_virt_addr,
+				out->_data_buf_phys_addr);
+	/* For Video Data buffer allocation */
+	out->_data_buf_virt_addr = pci_alloc_consistent(dev->pci,
+			out->upstream_databuf_size, &data_dma_addr);
+	out->_data_buf_phys_addr = data_dma_addr;
+	out->_data_buf_size = out->upstream_databuf_size;
+
+	if (!out->_data_buf_virt_addr) {
+		pr_err("FAILED to allocate memory for data buffer! Returning\n");
+		return -ENOMEM;
+	}
+
+	/* Clear memory at address */
+	memset(out->_data_buf_virt_addr, 0, out->_data_buf_size);
+
+	/* Create RISC programs */
+	ret = cx25821_risc_buffer_upstream(chan, dev->pci, 0, bpl,
+			out->_lines_count);
+	if (ret < 0) {
+		pr_info("Failed creating Video Upstream Risc programs!\n");
+		goto error;
+	}
+
+	return 0;
+
+error:
+	return ret;
+}
+
+static int cx25821_video_upstream_irq(struct cx25821_channel *chan, u32 status)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	u32 int_msk_tmp;
+	const struct sram_channel *channel = chan->sram_channels;
+	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);
+
+		wake_up(&out->waitq);
+
+		spin_lock(&dev->slock);
+
+		out->_frame_index = prog_cnt;
+
+		if (out->_is_first_frame) {
+			out->_is_first_frame = 0;
+
+			if (out->is_60hz) {
+				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 (out->_dma_virt_start_addr != NULL) {
+				line_size_in_bytes =
+				    (out->_pixel_format ==
+				     PIXEL_FRMT_411) ? Y411_LINE_SZ :
+				    Y422_LINE_SZ;
+				risc_phys_jump_addr =
+				    out->_dma_phys_start_addr +
+				    odd_risc_prog_size;
+
+				rp = cx25821_update_riscprogram(chan,
+					out->_dma_virt_start_addr, 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);
+	} else {
+		if (status & FLD_VID_SRC_UF)
+			pr_err("%s(): Video Received Underflow Error Interrupt!\n",
+			       __func__);
+
+		if (status & FLD_VID_SRC_SYNC)
+			pr_err("%s(): Video Received Sync Error Interrupt!\n",
+			       __func__);
+
+		if (status & FLD_VID_SRC_OPC_ERR)
+			pr_err("%s(): Video Received OpCode Error Interrupt!\n",
+			       __func__);
+	}
+
+	if (out->_file_status == END_OF_FILE) {
+		pr_err("EOF Channel 1 Framecount = %d\n", out->_frame_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(int irq, void *dev_id)
+{
+	struct cx25821_channel *chan = dev_id;
+	struct cx25821_dev *dev = chan->dev;
+	u32 vid_status;
+	int handled = 0;
+	const struct sram_channel *sram_ch;
+
+	if (!dev)
+		return -1;
+
+	sram_ch = chan->sram_channels;
+
+	vid_status = cx_read(sram_ch->int_stat);
+
+	/* Only deal with our interrupt */
+	if (vid_status)
+		handled = cx25821_video_upstream_irq(chan, vid_status);
+
+	return IRQ_RETVAL(handled);
+}
+
+static void cx25821_set_pixelengine(struct cx25821_channel *chan,
+				    const struct sram_channel *ch,
+				    int pix_format)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	int width = WIDTH_D1;
+	int height = out->_lines_count;
+	int num_lines, odd_num_lines;
+	u32 value;
+	int vip_mode = OUTPUT_FRMT_656;
+
+	value = ((pix_format & 0x3) << 12) | (vip_mode & 0x7);
+	value &= 0xFFFFFFEF;
+	value |= out->is_60hz ? 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 (out->is_60hz)
+		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);
+}
+
+static int cx25821_start_video_dma_upstream(struct cx25821_channel *chan,
+					    const struct sram_channel *sram_ch)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	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, out->_dma_phys_addr);
+	/* Risc IPC High 64 bits 63-32 */
+	cx_write(sram_ch->cmds_start + 4, 0);
+
+	/* 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,
+			IRQF_SHARED, dev->name, chan);
+	if (err < 0) {
+		pr_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);
+
+	out->_is_running = 1;
+	out->_is_first_frame = 1;
+
+	return 0;
+
+fail_irq:
+	cx25821_dev_unregister(dev);
+	return err;
+}
+
+int cx25821_vidupstream_init(struct cx25821_channel *chan,
+				 int pixel_format)
+{
+	struct cx25821_video_out_data *out = chan->out;
+	struct cx25821_dev *dev = chan->dev;
+	const struct sram_channel *sram_ch;
+	u32 tmp;
+	int err = 0;
+	int data_frame_size = 0;
+	int risc_buffer_size = 0;
+
+	if (out->_is_running) {
+		pr_info("Video Channel is still running so return!\n");
+		return 0;
+	}
+
+	sram_ch = chan->sram_channels;
+
+	out->is_60hz = dev->tvnorm & V4L2_STD_525_60;
+
+	/* 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);
+
+	out->_is_running = 0;
+	out->_frame_count = 0;
+	out->_file_status = RESET_STATUS;
+	out->_lines_count = out->is_60hz ? 480 : 576;
+	out->_pixel_format = pixel_format;
+	out->_line_size = (out->_pixel_format == PIXEL_FRMT_422) ?
+		(WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
+	data_frame_size = out->is_60hz ? NTSC_DATA_BUF_SZ : PAL_DATA_BUF_SZ;
+	risc_buffer_size = out->is_60hz ?
+		NTSC_RISC_BUF_SIZE : PAL_RISC_BUF_SIZE;
+
+	out->_is_running = 0;
+	out->_frame_count = 0;
+	out->_file_status = RESET_STATUS;
+	out->_lines_count = out->is_60hz ? 480 : 576;
+	out->_pixel_format = pixel_format;
+	out->_line_size = (out->_pixel_format == PIXEL_FRMT_422) ?
+		(WIDTH_D1 * 2) : (WIDTH_D1 * 3) / 2;
+	out->curpos = 0;
+	init_waitqueue_head(&out->waitq);
+
+	err = cx25821_sram_channel_setup_upstream(dev, sram_ch,
+			out->_line_size, 0);
+
+	/* setup fifo + format */
+	cx25821_set_pixelengine(chan, sram_ch, out->_pixel_format);
+
+	out->upstream_riscbuf_size = risc_buffer_size * 2;
+	out->upstream_databuf_size = data_frame_size * 2;
+
+	/* Allocating buffers and prepare RISC program */
+	err = cx25821_upstream_buffer_prepare(chan, sram_ch, out->_line_size);
+	if (err < 0) {
+		pr_err("%s: Failed to set up Video upstream buffers!\n",
+		       dev->name);
+		goto error;
+	}
+
+	cx25821_start_video_dma_upstream(chan, sram_ch);
+
+	return 0;
+
+error:
+	cx25821_dev_unregister(dev);
+
+	return err;
+}