drivers/media/video/omap24xxcam.h - kernel/prism - Git at Google

 /*
  * drivers/media/video/omap24xxcam.h
  *
  * Copyright (C) 2004 MontaVista Software, Inc.
  * Copyright (C) 2004 Texas Instruments.
  * Copyright (C) 2007 Nokia Corporation.
  *
  * Contact: Sakari Ailus <sakari.ailus@nokia.com>
  *
  * Based on code from Andy Lowe <source@mvista.com>.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 as published by the Free Software Foundation.
  *
  * 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., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  */

 #ifndef OMAP24XXCAM_H
 #define OMAP24XXCAM_H

 #include <media/videobuf-dma-sg.h>
 #include <media/v4l2-int-device.h>

 /*
  *
  * General driver related definitions.
  *
  */

 #define CAM_NAME				"omap24xxcam"

 #define CAM_MCLK				96000000

 /* number of bytes transferred per DMA request */
 #define DMA_THRESHOLD				32

 /*
  * NUM_CAMDMA_CHANNELS is the number of logical channels provided by
  * the camera DMA controller.
  */
 #define NUM_CAMDMA_CHANNELS			4

 /*
  * NUM_SG_DMA is the number of scatter-gather DMA transfers that can
  * be queued. (We don't have any overlay sglists now.)
  */
 #define NUM_SG_DMA				(VIDEO_MAX_FRAME)

 /*
  *
  * Register definitions.
  *
  */

 /* subsystem register block offsets */
 #define CC_REG_OFFSET				0x00000400
 #define CAMDMA_REG_OFFSET			0x00000800
 #define CAMMMU_REG_OFFSET			0x00000C00

 /* define camera subsystem register offsets */
 #define CAM_REVISION				0x000
 #define CAM_SYSCONFIG				0x010
 #define CAM_SYSSTATUS				0x014
 #define CAM_IRQSTATUS				0x018
 #define CAM_GPO					0x040
 #define CAM_GPI					0x050

 /* define camera core register offsets */
 #define CC_REVISION				0x000
 #define CC_SYSCONFIG				0x010
 #define CC_SYSSTATUS				0x014
 #define CC_IRQSTATUS				0x018
 #define CC_IRQENABLE				0x01C
 #define CC_CTRL					0x040
 #define CC_CTRL_DMA				0x044
 #define CC_CTRL_XCLK				0x048
 #define CC_FIFODATA				0x04C
 #define CC_TEST					0x050
 #define CC_GENPAR				0x054
 #define CC_CCPFSCR				0x058
 #define CC_CCPFECR				0x05C
 #define CC_CCPLSCR				0x060
 #define CC_CCPLECR				0x064
 #define CC_CCPDFR				0x068

 /* define camera dma register offsets */
 #define CAMDMA_REVISION				0x000
 #define CAMDMA_IRQSTATUS_L0			0x008
 #define CAMDMA_IRQSTATUS_L1			0x00C
 #define CAMDMA_IRQSTATUS_L2			0x010
 #define CAMDMA_IRQSTATUS_L3			0x014
 #define CAMDMA_IRQENABLE_L0			0x018
 #define CAMDMA_IRQENABLE_L1			0x01C
 #define CAMDMA_IRQENABLE_L2			0x020
 #define CAMDMA_IRQENABLE_L3			0x024
 #define CAMDMA_SYSSTATUS			0x028
 #define CAMDMA_OCP_SYSCONFIG			0x02C
 #define CAMDMA_CAPS_0				0x064
 #define CAMDMA_CAPS_2				0x06C
 #define CAMDMA_CAPS_3				0x070
 #define CAMDMA_CAPS_4				0x074
 #define CAMDMA_GCR				0x078
 #define CAMDMA_CCR(n)				(0x080 + (n)*0x60)
 #define CAMDMA_CLNK_CTRL(n)			(0x084 + (n)*0x60)
 #define CAMDMA_CICR(n)				(0x088 + (n)*0x60)
 #define CAMDMA_CSR(n)				(0x08C + (n)*0x60)
 #define CAMDMA_CSDP(n)				(0x090 + (n)*0x60)
 #define CAMDMA_CEN(n)				(0x094 + (n)*0x60)
 #define CAMDMA_CFN(n)				(0x098 + (n)*0x60)
 #define CAMDMA_CSSA(n)				(0x09C + (n)*0x60)
 #define CAMDMA_CDSA(n)				(0x0A0 + (n)*0x60)
 #define CAMDMA_CSEI(n)				(0x0A4 + (n)*0x60)
 #define CAMDMA_CSFI(n)				(0x0A8 + (n)*0x60)
 #define CAMDMA_CDEI(n)				(0x0AC + (n)*0x60)
 #define CAMDMA_CDFI(n)				(0x0B0 + (n)*0x60)
 #define CAMDMA_CSAC(n)				(0x0B4 + (n)*0x60)
 #define CAMDMA_CDAC(n)				(0x0B8 + (n)*0x60)
 #define CAMDMA_CCEN(n)				(0x0BC + (n)*0x60)
 #define CAMDMA_CCFN(n)				(0x0C0 + (n)*0x60)
 #define CAMDMA_COLOR(n)				(0x0C4 + (n)*0x60)

 /* define camera mmu register offsets */
 #define CAMMMU_REVISION				0x000
 #define CAMMMU_SYSCONFIG			0x010
 #define CAMMMU_SYSSTATUS			0x014
 #define CAMMMU_IRQSTATUS			0x018
 #define CAMMMU_IRQENABLE			0x01C
 #define CAMMMU_WALKING_ST			0x040
 #define CAMMMU_CNTL				0x044
 #define CAMMMU_FAULT_AD				0x048
 #define CAMMMU_TTB				0x04C
 #define CAMMMU_LOCK				0x050
 #define CAMMMU_LD_TLB				0x054
 #define CAMMMU_CAM				0x058
 #define CAMMMU_RAM				0x05C
 #define CAMMMU_GFLUSH				0x060
 #define CAMMMU_FLUSH_ENTRY			0x064
 #define CAMMMU_READ_CAM				0x068
 #define CAMMMU_READ_RAM				0x06C
 #define CAMMMU_EMU_FAULT_AD			0x070

 /* Define bit fields within selected registers */
 #define CAM_REVISION_MAJOR			(15 << 4)
 #define CAM_REVISION_MAJOR_SHIFT		4
 #define CAM_REVISION_MINOR			(15 << 0)
 #define CAM_REVISION_MINOR_SHIFT		0

 #define CAM_SYSCONFIG_SOFTRESET			(1 <<  1)
 #define CAM_SYSCONFIG_AUTOIDLE			(1 <<  0)

 #define CAM_SYSSTATUS_RESETDONE			(1 <<  0)

 #define CAM_IRQSTATUS_CC_IRQ			(1 <<  4)
 #define CAM_IRQSTATUS_MMU_IRQ			(1 <<  3)
 #define CAM_IRQSTATUS_DMA_IRQ2			(1 <<  2)
 #define CAM_IRQSTATUS_DMA_IRQ1			(1 <<  1)
 #define CAM_IRQSTATUS_DMA_IRQ0			(1 <<  0)

 #define CAM_GPO_CAM_S_P_EN			(1 <<  1)
 #define CAM_GPO_CAM_CCP_MODE			(1 <<  0)

 #define CAM_GPI_CC_DMA_REQ1			(1 << 24)
 #define CAP_GPI_CC_DMA_REQ0			(1 << 23)
 #define CAP_GPI_CAM_MSTANDBY			(1 << 21)
 #define CAP_GPI_CAM_WAIT			(1 << 20)
 #define CAP_GPI_CAM_S_DATA			(1 << 17)
 #define CAP_GPI_CAM_S_CLK			(1 << 16)
 #define CAP_GPI_CAM_P_DATA			(0xFFF << 3)
 #define CAP_GPI_CAM_P_DATA_SHIFT		3
 #define CAP_GPI_CAM_P_VS			(1 <<  2)
 #define CAP_GPI_CAM_P_HS			(1 <<  1)
 #define CAP_GPI_CAM_P_CLK			(1 <<  0)

 #define CC_REVISION_MAJOR			(15 << 4)
 #define CC_REVISION_MAJOR_SHIFT			4
 #define CC_REVISION_MINOR			(15 << 0)
 #define CC_REVISION_MINOR_SHIFT			0

 #define CC_SYSCONFIG_SIDLEMODE			(3 <<  3)
 #define CC_SYSCONFIG_SIDLEMODE_FIDLE		(0 <<  3)
 #define CC_SYSCONFIG_SIDLEMODE_NIDLE		(1 <<  3)
 #define CC_SYSCONFIG_SOFTRESET			(1 <<  1)
 #define CC_SYSCONFIG_AUTOIDLE			(1 <<  0)

 #define CC_SYSSTATUS_RESETDONE			(1 <<  0)

 #define CC_IRQSTATUS_FS_IRQ			(1 << 19)
 #define CC_IRQSTATUS_LE_IRQ			(1 << 18)
 #define CC_IRQSTATUS_LS_IRQ			(1 << 17)
 #define CC_IRQSTATUS_FE_IRQ			(1 << 16)
 #define CC_IRQSTATUS_FW_ERR_IRQ			(1 << 10)
 #define CC_IRQSTATUS_FSC_ERR_IRQ		(1 <<  9)
 #define CC_IRQSTATUS_SSC_ERR_IRQ		(1 <<  8)
 #define CC_IRQSTATUS_FIFO_NOEMPTY_IRQ		(1 <<  4)
 #define CC_IRQSTATUS_FIFO_FULL_IRQ		(1 <<  3)
 #define CC_IRQSTATUS_FIFO_THR_IRQ		(1 <<  2)
 #define CC_IRQSTATUS_FIFO_OF_IRQ		(1 <<  1)
 #define CC_IRQSTATUS_FIFO_UF_IRQ		(1 <<  0)

 #define CC_IRQENABLE_FS_IRQ			(1 << 19)
 #define CC_IRQENABLE_LE_IRQ			(1 << 18)
 #define CC_IRQENABLE_LS_IRQ			(1 << 17)
 #define CC_IRQENABLE_FE_IRQ			(1 << 16)
 #define CC_IRQENABLE_FW_ERR_IRQ			(1 << 10)
 #define CC_IRQENABLE_FSC_ERR_IRQ		(1 <<  9)
 #define CC_IRQENABLE_SSC_ERR_IRQ		(1 <<  8)
 #define CC_IRQENABLE_FIFO_NOEMPTY_IRQ		(1 <<  4)
 #define CC_IRQENABLE_FIFO_FULL_IRQ		(1 <<  3)
 #define CC_IRQENABLE_FIFO_THR_IRQ		(1 <<  2)
 #define CC_IRQENABLE_FIFO_OF_IRQ		(1 <<  1)
 #define CC_IRQENABLE_FIFO_UF_IRQ		(1 <<  0)

 #define CC_CTRL_CC_ONE_SHOT			(1 << 20)
 #define CC_CTRL_CC_IF_SYNCHRO			(1 << 19)
 #define CC_CTRL_CC_RST				(1 << 18)
 #define CC_CTRL_CC_FRAME_TRIG			(1 << 17)
 #define CC_CTRL_CC_EN				(1 << 16)
 #define CC_CTRL_NOBT_SYNCHRO			(1 << 13)
 #define CC_CTRL_BT_CORRECT			(1 << 12)
 #define CC_CTRL_PAR_ORDERCAM			(1 << 11)
 #define CC_CTRL_PAR_CLK_POL			(1 << 10)
 #define CC_CTRL_NOBT_HS_POL			(1 <<  9)
 #define CC_CTRL_NOBT_VS_POL			(1 <<  8)
 #define CC_CTRL_PAR_MODE			(7 <<  1)
 #define CC_CTRL_PAR_MODE_SHIFT			1
 #define CC_CTRL_PAR_MODE_NOBT8			(0 <<  1)
 #define CC_CTRL_PAR_MODE_NOBT10			(1 <<  1)
 #define CC_CTRL_PAR_MODE_NOBT12			(2 <<  1)
 #define CC_CTRL_PAR_MODE_BT8			(4 <<  1)
 #define CC_CTRL_PAR_MODE_BT10			(5 <<  1)
 #define CC_CTRL_PAR_MODE_FIFOTEST		(7 <<  1)
 #define CC_CTRL_CCP_MODE			(1 <<  0)

 #define CC_CTRL_DMA_EN				(1 <<  8)
 #define CC_CTRL_DMA_FIFO_THRESHOLD		(0x7F << 0)
 #define CC_CTRL_DMA_FIFO_THRESHOLD_SHIFT	0

 #define CC_CTRL_XCLK_DIV			(0x1F << 0)
 #define CC_CTRL_XCLK_DIV_SHIFT			0
 #define CC_CTRL_XCLK_DIV_STABLE_LOW		(0 <<  0)
 #define CC_CTRL_XCLK_DIV_STABLE_HIGH		(1 <<  0)
 #define CC_CTRL_XCLK_DIV_BYPASS			(31 << 0)

 #define CC_TEST_FIFO_RD_POINTER			(0xFF << 24)
 #define CC_TEST_FIFO_RD_POINTER_SHIFT		24
 #define CC_TEST_FIFO_WR_POINTER			(0xFF << 16)
 #define CC_TEST_FIFO_WR_POINTER_SHIFT		16
 #define CC_TEST_FIFO_LEVEL			(0xFF <<  8)
 #define CC_TEST_FIFO_LEVEL_SHIFT		8
 #define CC_TEST_FIFO_LEVEL_PEAK			(0xFF <<  0)
 #define CC_TEST_FIFO_LEVEL_PEAK_SHIFT		0

 #define CC_GENPAR_FIFO_DEPTH			(7 <<  0)
 #define CC_GENPAR_FIFO_DEPTH_SHIFT		0

 #define CC_CCPDFR_ALPHA				(0xFF <<  8)
 #define CC_CCPDFR_ALPHA_SHIFT			8
 #define CC_CCPDFR_DATAFORMAT			(15 <<  0)
 #define CC_CCPDFR_DATAFORMAT_SHIFT		0
 #define CC_CCPDFR_DATAFORMAT_YUV422BE		(0 <<  0)
 #define CC_CCPDFR_DATAFORMAT_YUV422		(1 <<  0)
 #define CC_CCPDFR_DATAFORMAT_YUV420		(2 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RGB444		(4 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RGB565		(5 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RGB888NDE		(6 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RGB888		(7 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW8NDE		(8 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW8		(9 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW10NDE		(10 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW10		(11 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW12NDE		(12 <<  0)
 #define CC_CCPDFR_DATAFORMAT_RAW12		(13 <<  0)
 #define CC_CCPDFR_DATAFORMAT_JPEG8		(15 <<  0)

 #define CAMDMA_REVISION_MAJOR			(15 << 4)
 #define CAMDMA_REVISION_MAJOR_SHIFT		4
 #define CAMDMA_REVISION_MINOR			(15 << 0)
 #define CAMDMA_REVISION_MINOR_SHIFT		0

 #define CAMDMA_OCP_SYSCONFIG_MIDLEMODE		(3 << 12)
 #define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_FSTANDBY	(0 << 12)
 #define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_NSTANDBY	(1 << 12)
 #define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_SSTANDBY	(2 << 12)
 #define CAMDMA_OCP_SYSCONFIG_FUNC_CLOCK		(1 <<  9)
 #define CAMDMA_OCP_SYSCONFIG_OCP_CLOCK		(1 <<  8)
 #define CAMDMA_OCP_SYSCONFIG_EMUFREE		(1 <<  5)
 #define CAMDMA_OCP_SYSCONFIG_SIDLEMODE		(3 <<  3)
 #define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_FIDLE	(0 <<  3)
 #define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_NIDLE	(1 <<  3)
 #define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_SIDLE	(2 <<  3)
 #define CAMDMA_OCP_SYSCONFIG_SOFTRESET		(1 <<  1)
 #define CAMDMA_OCP_SYSCONFIG_AUTOIDLE		(1 <<  0)

 #define CAMDMA_SYSSTATUS_RESETDONE		(1 <<  0)

 #define CAMDMA_GCR_ARBITRATION_RATE		(0xFF << 16)
 #define CAMDMA_GCR_ARBITRATION_RATE_SHIFT	16
 #define CAMDMA_GCR_MAX_CHANNEL_FIFO_DEPTH	(0xFF << 0)
 #define CAMDMA_GCR_MAX_CHANNEL_FIFO_DEPTH_SHIFT	0

 #define CAMDMA_CCR_SEL_SRC_DST_SYNC		(1 << 24)
 #define CAMDMA_CCR_PREFETCH			(1 << 23)
 #define CAMDMA_CCR_SUPERVISOR			(1 << 22)
 #define CAMDMA_CCR_SECURE			(1 << 21)
 #define CAMDMA_CCR_BS				(1 << 18)
 #define CAMDMA_CCR_TRANSPARENT_COPY_ENABLE	(1 << 17)
 #define CAMDMA_CCR_CONSTANT_FILL_ENABLE		(1 << 16)
 #define CAMDMA_CCR_DST_AMODE			(3 << 14)
 #define CAMDMA_CCR_DST_AMODE_CONST_ADDR		(0 << 14)
 #define CAMDMA_CCR_DST_AMODE_POST_INC		(1 << 14)
 #define CAMDMA_CCR_DST_AMODE_SGL_IDX		(2 << 14)
 #define CAMDMA_CCR_DST_AMODE_DBL_IDX		(3 << 14)
 #define CAMDMA_CCR_SRC_AMODE			(3 << 12)
 #define CAMDMA_CCR_SRC_AMODE_CONST_ADDR		(0 << 12)
 #define CAMDMA_CCR_SRC_AMODE_POST_INC		(1 << 12)
 #define CAMDMA_CCR_SRC_AMODE_SGL_IDX		(2 << 12)
 #define CAMDMA_CCR_SRC_AMODE_DBL_IDX		(3 << 12)
 #define CAMDMA_CCR_WR_ACTIVE			(1 << 10)
 #define CAMDMA_CCR_RD_ACTIVE			(1 <<  9)
 #define CAMDMA_CCR_SUSPEND_SENSITIVE		(1 <<  8)
 #define CAMDMA_CCR_ENABLE			(1 <<  7)
 #define CAMDMA_CCR_PRIO				(1 <<  6)
 #define CAMDMA_CCR_FS				(1 <<  5)
 #define CAMDMA_CCR_SYNCHRO			((3 << 19) | (31 << 0))
 #define CAMDMA_CCR_SYNCHRO_CAMERA		0x01

 #define CAMDMA_CLNK_CTRL_ENABLE_LNK		(1 << 15)
 #define CAMDMA_CLNK_CTRL_NEXTLCH_ID		(0x1F << 0)
 #define CAMDMA_CLNK_CTRL_NEXTLCH_ID_SHIFT	0

 #define CAMDMA_CICR_MISALIGNED_ERR_IE		(1 << 11)
 #define CAMDMA_CICR_SUPERVISOR_ERR_IE		(1 << 10)
 #define CAMDMA_CICR_SECURE_ERR_IE		(1 <<  9)
 #define CAMDMA_CICR_TRANS_ERR_IE		(1 <<  8)
 #define CAMDMA_CICR_PACKET_IE			(1 <<  7)
 #define CAMDMA_CICR_BLOCK_IE			(1 <<  5)
 #define CAMDMA_CICR_LAST_IE			(1 <<  4)
 #define CAMDMA_CICR_FRAME_IE			(1 <<  3)
 #define CAMDMA_CICR_HALF_IE			(1 <<  2)
 #define CAMDMA_CICR_DROP_IE			(1 <<  1)

 #define CAMDMA_CSR_MISALIGNED_ERR		(1 << 11)
 #define CAMDMA_CSR_SUPERVISOR_ERR		(1 << 10)
 #define CAMDMA_CSR_SECURE_ERR			(1 <<  9)
 #define CAMDMA_CSR_TRANS_ERR			(1 <<  8)
 #define CAMDMA_CSR_PACKET			(1 <<  7)
 #define CAMDMA_CSR_SYNC				(1 <<  6)
 #define CAMDMA_CSR_BLOCK			(1 <<  5)
 #define CAMDMA_CSR_LAST				(1 <<  4)
 #define CAMDMA_CSR_FRAME			(1 <<  3)
 #define CAMDMA_CSR_HALF				(1 <<  2)
 #define CAMDMA_CSR_DROP				(1 <<  1)

 #define CAMDMA_CSDP_SRC_ENDIANNESS		(1 << 21)
 #define CAMDMA_CSDP_SRC_ENDIANNESS_LOCK		(1 << 20)
 #define CAMDMA_CSDP_DST_ENDIANNESS		(1 << 19)
 #define CAMDMA_CSDP_DST_ENDIANNESS_LOCK		(1 << 18)
 #define CAMDMA_CSDP_WRITE_MODE			(3 << 16)
 #define CAMDMA_CSDP_WRITE_MODE_WRNP		(0 << 16)
 #define CAMDMA_CSDP_WRITE_MODE_POSTED		(1 << 16)
 #define CAMDMA_CSDP_WRITE_MODE_POSTED_LAST_WRNP	(2 << 16)
 #define CAMDMA_CSDP_DST_BURST_EN		(3 << 14)
 #define CAMDMA_CSDP_DST_BURST_EN_1		(0 << 14)
 #define CAMDMA_CSDP_DST_BURST_EN_16		(1 << 14)
 #define CAMDMA_CSDP_DST_BURST_EN_32		(2 << 14)
 #define CAMDMA_CSDP_DST_BURST_EN_64		(3 << 14)
 #define CAMDMA_CSDP_DST_PACKED			(1 << 13)
 #define CAMDMA_CSDP_WR_ADD_TRSLT		(15 << 9)
 #define CAMDMA_CSDP_WR_ADD_TRSLT_ENABLE_MREQADD	(3 <<  9)
 #define CAMDMA_CSDP_SRC_BURST_EN		(3 <<  7)
 #define CAMDMA_CSDP_SRC_BURST_EN_1		(0 <<  7)
 #define CAMDMA_CSDP_SRC_BURST_EN_16		(1 <<  7)
 #define CAMDMA_CSDP_SRC_BURST_EN_32		(2 <<  7)
 #define CAMDMA_CSDP_SRC_BURST_EN_64		(3 <<  7)
 #define CAMDMA_CSDP_SRC_PACKED			(1 <<  6)
 #define CAMDMA_CSDP_RD_ADD_TRSLT		(15 << 2)
 #define CAMDMA_CSDP_RD_ADD_TRSLT_ENABLE_MREQADD	(3 <<  2)
 #define CAMDMA_CSDP_DATA_TYPE			(3 <<  0)
 #define CAMDMA_CSDP_DATA_TYPE_8BITS		(0 <<  0)
 #define CAMDMA_CSDP_DATA_TYPE_16BITS		(1 <<  0)
 #define CAMDMA_CSDP_DATA_TYPE_32BITS		(2 <<  0)

 #define CAMMMU_SYSCONFIG_AUTOIDLE		(1 <<  0)

 /*
  *
  * Declarations.
  *
  */

 /* forward declarations */
 struct omap24xxcam_sgdma;
 struct omap24xxcam_dma;

 typedef void (*sgdma_callback_t)(struct omap24xxcam_sgdma *cam,
 				 u32 status, void *arg);
 typedef void (*dma_callback_t)(struct omap24xxcam_dma *cam,
 			       u32 status, void *arg);

 struct channel_state {
 	dma_callback_t callback;
 	void *arg;
 };

 /* sgdma state for each of the possible videobuf_buffers + 2 overlays */
 struct sgdma_state {
 	const struct scatterlist *sglist;
 	int sglen;		 /* number of sglist entries */
 	int next_sglist;	 /* index of next sglist entry to process */
 	unsigned int bytes_read; /* number of bytes read */
 	unsigned int len;        /* total length of sglist (excluding
 				  * bytes due to page alignment) */
 	int queued_sglist;	 /* number of sglist entries queued for DMA */
 	u32 csr;		 /* DMA return code */
 	sgdma_callback_t callback;
 	void *arg;
 };

 /* physical DMA channel management */
 struct omap24xxcam_dma {
 	spinlock_t lock;	/* Lock for the whole structure. */

 	unsigned long base;	/* base address for dma controller */

 	/* While dma_stop!=0, an attempt to start a new DMA transfer will
 	 * fail.
 	 */
 	atomic_t dma_stop;
 	int free_dmach;		/* number of dma channels free */
 	int next_dmach;		/* index of next dma channel to use */
 	struct channel_state ch_state[NUM_CAMDMA_CHANNELS];
 };

 /* scatter-gather DMA (scatterlist stuff) management */
 struct omap24xxcam_sgdma {
 	struct omap24xxcam_dma dma;

 	spinlock_t lock;	/* Lock for the fields below. */
 	int free_sgdma;		/* number of free sg dma slots */
 	int next_sgdma;		/* index of next sg dma slot to use */
 	struct sgdma_state sg_state[NUM_SG_DMA];

 	/* Reset timer data */
 	struct timer_list reset_timer;
 };

 /* per-device data structure */
 struct omap24xxcam_device {
 	/*** mutex  ***/
 	/*
 	 * mutex serialises access to this structure. Also camera
 	 * opening and releasing is synchronised by this.
 	 */
 	struct mutex mutex;

 	/*** general driver state information ***/
 	atomic_t users;
 	/*
 	 * Lock to serialise core enabling and disabling and access to
 	 * sgdma_in_queue.
 	 */
 	spinlock_t core_enable_disable_lock;
 	/*
 	 * Number or sgdma requests in scatter-gather queue, protected
 	 * by the lock above.
 	 */
 	int sgdma_in_queue;
 	/*
 	 * Sensor interface parameters: interface type, CC_CTRL
 	 * register value and interface specific data.
 	 */
 	int if_type;
 	union {
 		struct parallel {
 			u32 xclk;
 		} bt656;
 	} if_u;
 	u32 cc_ctrl;

 	/*** subsystem structures ***/
 	struct omap24xxcam_sgdma sgdma;

 	/*** hardware resources ***/
 	unsigned int irq;
 	unsigned long mmio_base;
 	unsigned long mmio_base_phys;
 	unsigned long mmio_size;

 	/*** interfaces and device ***/
 	struct v4l2_int_device *sdev;
 	struct device *dev;
 	struct video_device *vfd;

 	/*** camera and sensor reset related stuff ***/
 	struct work_struct sensor_reset_work;
 	/*
 	 * We're in the middle of a reset. Don't enable core if this
 	 * is non-zero! This exists to help decisionmaking in a case
 	 * where videobuf_qbuf is called while we are in the middle of
 	 * a reset.
 	 */
 	atomic_t in_reset;
 	/*
 	 * Non-zero if we don't want any resets for now. Used to
 	 * prevent reset work to run when we're about to stop
 	 * streaming.
 	 */
 	atomic_t reset_disable;

 	/*** video device parameters ***/
 	int capture_mem;

 	/*** camera module clocks ***/
 	struct clk *fck;
 	struct clk *ick;

 	/*** capture data ***/
 	/* file handle, if streaming is on */
 	struct file *streaming;
 };

 /* Per-file handle data. */
 struct omap24xxcam_fh {
 	spinlock_t vbq_lock; /* spinlock for the videobuf queue */
 	struct videobuf_queue vbq;
 	struct v4l2_pix_format pix; /* serialise pix by vbq->lock */
 	atomic_t field_count; /* field counter for videobuf_buffer */
 	/* accessing cam here doesn't need serialisation: it's constant */
 	struct omap24xxcam_device *cam;
 };

 /*
  *
  * Register I/O functions.
  *
  */

 static inline u32 omap24xxcam_reg_in(unsigned long base, u32 offset)
 {
 	return readl(base + offset);
 }

 static inline u32 omap24xxcam_reg_out(unsigned long base, u32 offset,
 					  u32 val)
 {
 	writel(val, base + offset);
 	return val;
 }

 static inline u32 omap24xxcam_reg_merge(unsigned long base, u32 offset,
 					    u32 val, u32 mask)
 {
 	u32 addr = base + offset;
 	u32 new_val = (readl(addr) & ~mask) | (val & mask);

 	writel(new_val, addr);
 	return new_val;
 }

 /*
  *
  * Function prototypes.
  *
  */

 /* dma prototypes */

 void omap24xxcam_dma_hwinit(struct omap24xxcam_dma *dma);
 void omap24xxcam_dma_isr(struct omap24xxcam_dma *dma);

 /* sgdma prototypes */

 void omap24xxcam_sgdma_process(struct omap24xxcam_sgdma *sgdma);
 int omap24xxcam_sgdma_queue(struct omap24xxcam_sgdma *sgdma,
 			    const struct scatterlist *sglist, int sglen,
 			    int len, sgdma_callback_t callback, void *arg);
 void omap24xxcam_sgdma_sync(struct omap24xxcam_sgdma *sgdma);
 void omap24xxcam_sgdma_init(struct omap24xxcam_sgdma *sgdma,
 			    unsigned long base,
 			    void (*reset_callback)(unsigned long data),
 			    unsigned long reset_callback_data);
 void omap24xxcam_sgdma_exit(struct omap24xxcam_sgdma *sgdma);

 #endif
	/*
	* drivers/media/video/omap24xxcam.h
	*
	* Copyright (C) 2004 MontaVista Software, Inc.
	* Copyright (C) 2004 Texas Instruments.
	* Copyright (C) 2007 Nokia Corporation.
	*
	* Contact: Sakari Ailus <sakari.ailus@nokia.com>
	*
	* Based on code from Andy Lowe <source@mvista.com>.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* version 2 as published by the Free Software Foundation.
	*
	* 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., 51 Franklin St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*/

	#ifndef OMAP24XXCAM_H
	#define OMAP24XXCAM_H

	#include <media/videobuf-dma-sg.h>
	#include <media/v4l2-int-device.h>

	/*
	*
	* General driver related definitions.
	*
	*/

	#define CAM_NAME "omap24xxcam"

	#define CAM_MCLK 96000000

	/* number of bytes transferred per DMA request */
	#define DMA_THRESHOLD 32

	/*
	* NUM_CAMDMA_CHANNELS is the number of logical channels provided by
	* the camera DMA controller.
	*/
	#define NUM_CAMDMA_CHANNELS 4

	/*
	* NUM_SG_DMA is the number of scatter-gather DMA transfers that can
	* be queued. (We don't have any overlay sglists now.)
	*/
	#define NUM_SG_DMA (VIDEO_MAX_FRAME)

	/*
	*
	* Register definitions.
	*
	*/

	/* subsystem register block offsets */
	#define CC_REG_OFFSET 0x00000400
	#define CAMDMA_REG_OFFSET 0x00000800
	#define CAMMMU_REG_OFFSET 0x00000C00

	/* define camera subsystem register offsets */
	#define CAM_REVISION 0x000
	#define CAM_SYSCONFIG 0x010
	#define CAM_SYSSTATUS 0x014
	#define CAM_IRQSTATUS 0x018
	#define CAM_GPO 0x040
	#define CAM_GPI 0x050

	/* define camera core register offsets */
	#define CC_REVISION 0x000
	#define CC_SYSCONFIG 0x010
	#define CC_SYSSTATUS 0x014
	#define CC_IRQSTATUS 0x018
	#define CC_IRQENABLE 0x01C
	#define CC_CTRL 0x040
	#define CC_CTRL_DMA 0x044
	#define CC_CTRL_XCLK 0x048
	#define CC_FIFODATA 0x04C
	#define CC_TEST 0x050
	#define CC_GENPAR 0x054
	#define CC_CCPFSCR 0x058
	#define CC_CCPFECR 0x05C
	#define CC_CCPLSCR 0x060
	#define CC_CCPLECR 0x064
	#define CC_CCPDFR 0x068

	/* define camera dma register offsets */
	#define CAMDMA_REVISION 0x000
	#define CAMDMA_IRQSTATUS_L0 0x008
	#define CAMDMA_IRQSTATUS_L1 0x00C
	#define CAMDMA_IRQSTATUS_L2 0x010
	#define CAMDMA_IRQSTATUS_L3 0x014
	#define CAMDMA_IRQENABLE_L0 0x018
	#define CAMDMA_IRQENABLE_L1 0x01C
	#define CAMDMA_IRQENABLE_L2 0x020
	#define CAMDMA_IRQENABLE_L3 0x024
	#define CAMDMA_SYSSTATUS 0x028
	#define CAMDMA_OCP_SYSCONFIG 0x02C
	#define CAMDMA_CAPS_0 0x064
	#define CAMDMA_CAPS_2 0x06C
	#define CAMDMA_CAPS_3 0x070
	#define CAMDMA_CAPS_4 0x074
	#define CAMDMA_GCR 0x078
	#define CAMDMA_CCR(n) (0x080 + (n)*0x60)
	#define CAMDMA_CLNK_CTRL(n) (0x084 + (n)*0x60)
	#define CAMDMA_CICR(n) (0x088 + (n)*0x60)
	#define CAMDMA_CSR(n) (0x08C + (n)*0x60)
	#define CAMDMA_CSDP(n) (0x090 + (n)*0x60)
	#define CAMDMA_CEN(n) (0x094 + (n)*0x60)
	#define CAMDMA_CFN(n) (0x098 + (n)*0x60)
	#define CAMDMA_CSSA(n) (0x09C + (n)*0x60)
	#define CAMDMA_CDSA(n) (0x0A0 + (n)*0x60)
	#define CAMDMA_CSEI(n) (0x0A4 + (n)*0x60)
	#define CAMDMA_CSFI(n) (0x0A8 + (n)*0x60)
	#define CAMDMA_CDEI(n) (0x0AC + (n)*0x60)
	#define CAMDMA_CDFI(n) (0x0B0 + (n)*0x60)
	#define CAMDMA_CSAC(n) (0x0B4 + (n)*0x60)
	#define CAMDMA_CDAC(n) (0x0B8 + (n)*0x60)
	#define CAMDMA_CCEN(n) (0x0BC + (n)*0x60)
	#define CAMDMA_CCFN(n) (0x0C0 + (n)*0x60)
	#define CAMDMA_COLOR(n) (0x0C4 + (n)*0x60)

	/* define camera mmu register offsets */
	#define CAMMMU_REVISION 0x000
	#define CAMMMU_SYSCONFIG 0x010
	#define CAMMMU_SYSSTATUS 0x014
	#define CAMMMU_IRQSTATUS 0x018
	#define CAMMMU_IRQENABLE 0x01C
	#define CAMMMU_WALKING_ST 0x040
	#define CAMMMU_CNTL 0x044
	#define CAMMMU_FAULT_AD 0x048
	#define CAMMMU_TTB 0x04C
	#define CAMMMU_LOCK 0x050
	#define CAMMMU_LD_TLB 0x054
	#define CAMMMU_CAM 0x058
	#define CAMMMU_RAM 0x05C
	#define CAMMMU_GFLUSH 0x060
	#define CAMMMU_FLUSH_ENTRY 0x064
	#define CAMMMU_READ_CAM 0x068
	#define CAMMMU_READ_RAM 0x06C
	#define CAMMMU_EMU_FAULT_AD 0x070

	/* Define bit fields within selected registers */
	#define CAM_REVISION_MAJOR (15 << 4)
	#define CAM_REVISION_MAJOR_SHIFT 4
	#define CAM_REVISION_MINOR (15 << 0)
	#define CAM_REVISION_MINOR_SHIFT 0

	#define CAM_SYSCONFIG_SOFTRESET (1 << 1)
	#define CAM_SYSCONFIG_AUTOIDLE (1 << 0)

	#define CAM_SYSSTATUS_RESETDONE (1 << 0)

	#define CAM_IRQSTATUS_CC_IRQ (1 << 4)
	#define CAM_IRQSTATUS_MMU_IRQ (1 << 3)
	#define CAM_IRQSTATUS_DMA_IRQ2 (1 << 2)
	#define CAM_IRQSTATUS_DMA_IRQ1 (1 << 1)
	#define CAM_IRQSTATUS_DMA_IRQ0 (1 << 0)

	#define CAM_GPO_CAM_S_P_EN (1 << 1)
	#define CAM_GPO_CAM_CCP_MODE (1 << 0)

	#define CAM_GPI_CC_DMA_REQ1 (1 << 24)
	#define CAP_GPI_CC_DMA_REQ0 (1 << 23)
	#define CAP_GPI_CAM_MSTANDBY (1 << 21)
	#define CAP_GPI_CAM_WAIT (1 << 20)
	#define CAP_GPI_CAM_S_DATA (1 << 17)
	#define CAP_GPI_CAM_S_CLK (1 << 16)
	#define CAP_GPI_CAM_P_DATA (0xFFF << 3)
	#define CAP_GPI_CAM_P_DATA_SHIFT 3
	#define CAP_GPI_CAM_P_VS (1 << 2)
	#define CAP_GPI_CAM_P_HS (1 << 1)
	#define CAP_GPI_CAM_P_CLK (1 << 0)

	#define CC_REVISION_MAJOR (15 << 4)
	#define CC_REVISION_MAJOR_SHIFT 4
	#define CC_REVISION_MINOR (15 << 0)
	#define CC_REVISION_MINOR_SHIFT 0

	#define CC_SYSCONFIG_SIDLEMODE (3 << 3)
	#define CC_SYSCONFIG_SIDLEMODE_FIDLE (0 << 3)
	#define CC_SYSCONFIG_SIDLEMODE_NIDLE (1 << 3)
	#define CC_SYSCONFIG_SOFTRESET (1 << 1)
	#define CC_SYSCONFIG_AUTOIDLE (1 << 0)

	#define CC_SYSSTATUS_RESETDONE (1 << 0)

	#define CC_IRQSTATUS_FS_IRQ (1 << 19)
	#define CC_IRQSTATUS_LE_IRQ (1 << 18)
	#define CC_IRQSTATUS_LS_IRQ (1 << 17)
	#define CC_IRQSTATUS_FE_IRQ (1 << 16)
	#define CC_IRQSTATUS_FW_ERR_IRQ (1 << 10)
	#define CC_IRQSTATUS_FSC_ERR_IRQ (1 << 9)
	#define CC_IRQSTATUS_SSC_ERR_IRQ (1 << 8)
	#define CC_IRQSTATUS_FIFO_NOEMPTY_IRQ (1 << 4)
	#define CC_IRQSTATUS_FIFO_FULL_IRQ (1 << 3)
	#define CC_IRQSTATUS_FIFO_THR_IRQ (1 << 2)
	#define CC_IRQSTATUS_FIFO_OF_IRQ (1 << 1)
	#define CC_IRQSTATUS_FIFO_UF_IRQ (1 << 0)

	#define CC_IRQENABLE_FS_IRQ (1 << 19)
	#define CC_IRQENABLE_LE_IRQ (1 << 18)
	#define CC_IRQENABLE_LS_IRQ (1 << 17)
	#define CC_IRQENABLE_FE_IRQ (1 << 16)
	#define CC_IRQENABLE_FW_ERR_IRQ (1 << 10)
	#define CC_IRQENABLE_FSC_ERR_IRQ (1 << 9)
	#define CC_IRQENABLE_SSC_ERR_IRQ (1 << 8)
	#define CC_IRQENABLE_FIFO_NOEMPTY_IRQ (1 << 4)
	#define CC_IRQENABLE_FIFO_FULL_IRQ (1 << 3)
	#define CC_IRQENABLE_FIFO_THR_IRQ (1 << 2)
	#define CC_IRQENABLE_FIFO_OF_IRQ (1 << 1)
	#define CC_IRQENABLE_FIFO_UF_IRQ (1 << 0)

	#define CC_CTRL_CC_ONE_SHOT (1 << 20)
	#define CC_CTRL_CC_IF_SYNCHRO (1 << 19)
	#define CC_CTRL_CC_RST (1 << 18)
	#define CC_CTRL_CC_FRAME_TRIG (1 << 17)
	#define CC_CTRL_CC_EN (1 << 16)
	#define CC_CTRL_NOBT_SYNCHRO (1 << 13)
	#define CC_CTRL_BT_CORRECT (1 << 12)
	#define CC_CTRL_PAR_ORDERCAM (1 << 11)
	#define CC_CTRL_PAR_CLK_POL (1 << 10)
	#define CC_CTRL_NOBT_HS_POL (1 << 9)
	#define CC_CTRL_NOBT_VS_POL (1 << 8)
	#define CC_CTRL_PAR_MODE (7 << 1)
	#define CC_CTRL_PAR_MODE_SHIFT 1
	#define CC_CTRL_PAR_MODE_NOBT8 (0 << 1)
	#define CC_CTRL_PAR_MODE_NOBT10 (1 << 1)
	#define CC_CTRL_PAR_MODE_NOBT12 (2 << 1)
	#define CC_CTRL_PAR_MODE_BT8 (4 << 1)
	#define CC_CTRL_PAR_MODE_BT10 (5 << 1)
	#define CC_CTRL_PAR_MODE_FIFOTEST (7 << 1)
	#define CC_CTRL_CCP_MODE (1 << 0)

	#define CC_CTRL_DMA_EN (1 << 8)
	#define CC_CTRL_DMA_FIFO_THRESHOLD (0x7F << 0)
	#define CC_CTRL_DMA_FIFO_THRESHOLD_SHIFT 0

	#define CC_CTRL_XCLK_DIV (0x1F << 0)
	#define CC_CTRL_XCLK_DIV_SHIFT 0
	#define CC_CTRL_XCLK_DIV_STABLE_LOW (0 << 0)
	#define CC_CTRL_XCLK_DIV_STABLE_HIGH (1 << 0)
	#define CC_CTRL_XCLK_DIV_BYPASS (31 << 0)

	#define CC_TEST_FIFO_RD_POINTER (0xFF << 24)
	#define CC_TEST_FIFO_RD_POINTER_SHIFT 24
	#define CC_TEST_FIFO_WR_POINTER (0xFF << 16)
	#define CC_TEST_FIFO_WR_POINTER_SHIFT 16
	#define CC_TEST_FIFO_LEVEL (0xFF << 8)
	#define CC_TEST_FIFO_LEVEL_SHIFT 8
	#define CC_TEST_FIFO_LEVEL_PEAK (0xFF << 0)
	#define CC_TEST_FIFO_LEVEL_PEAK_SHIFT 0

	#define CC_GENPAR_FIFO_DEPTH (7 << 0)
	#define CC_GENPAR_FIFO_DEPTH_SHIFT 0

	#define CC_CCPDFR_ALPHA (0xFF << 8)
	#define CC_CCPDFR_ALPHA_SHIFT 8
	#define CC_CCPDFR_DATAFORMAT (15 << 0)
	#define CC_CCPDFR_DATAFORMAT_SHIFT 0
	#define CC_CCPDFR_DATAFORMAT_YUV422BE (0 << 0)
	#define CC_CCPDFR_DATAFORMAT_YUV422 (1 << 0)
	#define CC_CCPDFR_DATAFORMAT_YUV420 (2 << 0)
	#define CC_CCPDFR_DATAFORMAT_RGB444 (4 << 0)
	#define CC_CCPDFR_DATAFORMAT_RGB565 (5 << 0)
	#define CC_CCPDFR_DATAFORMAT_RGB888NDE (6 << 0)
	#define CC_CCPDFR_DATAFORMAT_RGB888 (7 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW8NDE (8 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW8 (9 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW10NDE (10 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW10 (11 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW12NDE (12 << 0)
	#define CC_CCPDFR_DATAFORMAT_RAW12 (13 << 0)
	#define CC_CCPDFR_DATAFORMAT_JPEG8 (15 << 0)

	#define CAMDMA_REVISION_MAJOR (15 << 4)
	#define CAMDMA_REVISION_MAJOR_SHIFT 4
	#define CAMDMA_REVISION_MINOR (15 << 0)
	#define CAMDMA_REVISION_MINOR_SHIFT 0

	#define CAMDMA_OCP_SYSCONFIG_MIDLEMODE (3 << 12)
	#define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_FSTANDBY (0 << 12)
	#define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_NSTANDBY (1 << 12)
	#define CAMDMA_OCP_SYSCONFIG_MIDLEMODE_SSTANDBY (2 << 12)
	#define CAMDMA_OCP_SYSCONFIG_FUNC_CLOCK (1 << 9)
	#define CAMDMA_OCP_SYSCONFIG_OCP_CLOCK (1 << 8)
	#define CAMDMA_OCP_SYSCONFIG_EMUFREE (1 << 5)
	#define CAMDMA_OCP_SYSCONFIG_SIDLEMODE (3 << 3)
	#define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_FIDLE (0 << 3)
	#define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_NIDLE (1 << 3)
	#define CAMDMA_OCP_SYSCONFIG_SIDLEMODE_SIDLE (2 << 3)
	#define CAMDMA_OCP_SYSCONFIG_SOFTRESET (1 << 1)
	#define CAMDMA_OCP_SYSCONFIG_AUTOIDLE (1 << 0)

	#define CAMDMA_SYSSTATUS_RESETDONE (1 << 0)

	#define CAMDMA_GCR_ARBITRATION_RATE (0xFF << 16)
	#define CAMDMA_GCR_ARBITRATION_RATE_SHIFT 16
	#define CAMDMA_GCR_MAX_CHANNEL_FIFO_DEPTH (0xFF << 0)
	#define CAMDMA_GCR_MAX_CHANNEL_FIFO_DEPTH_SHIFT 0

	#define CAMDMA_CCR_SEL_SRC_DST_SYNC (1 << 24)
	#define CAMDMA_CCR_PREFETCH (1 << 23)
	#define CAMDMA_CCR_SUPERVISOR (1 << 22)
	#define CAMDMA_CCR_SECURE (1 << 21)
	#define CAMDMA_CCR_BS (1 << 18)
	#define CAMDMA_CCR_TRANSPARENT_COPY_ENABLE (1 << 17)
	#define CAMDMA_CCR_CONSTANT_FILL_ENABLE (1 << 16)
	#define CAMDMA_CCR_DST_AMODE (3 << 14)
	#define CAMDMA_CCR_DST_AMODE_CONST_ADDR (0 << 14)
	#define CAMDMA_CCR_DST_AMODE_POST_INC (1 << 14)
	#define CAMDMA_CCR_DST_AMODE_SGL_IDX (2 << 14)
	#define CAMDMA_CCR_DST_AMODE_DBL_IDX (3 << 14)
	#define CAMDMA_CCR_SRC_AMODE (3 << 12)
	#define CAMDMA_CCR_SRC_AMODE_CONST_ADDR (0 << 12)
	#define CAMDMA_CCR_SRC_AMODE_POST_INC (1 << 12)
	#define CAMDMA_CCR_SRC_AMODE_SGL_IDX (2 << 12)
	#define CAMDMA_CCR_SRC_AMODE_DBL_IDX (3 << 12)
	#define CAMDMA_CCR_WR_ACTIVE (1 << 10)
	#define CAMDMA_CCR_RD_ACTIVE (1 << 9)
	#define CAMDMA_CCR_SUSPEND_SENSITIVE (1 << 8)
	#define CAMDMA_CCR_ENABLE (1 << 7)
	#define CAMDMA_CCR_PRIO (1 << 6)
	#define CAMDMA_CCR_FS (1 << 5)
	#define CAMDMA_CCR_SYNCHRO ((3 << 19) \| (31 << 0))
	#define CAMDMA_CCR_SYNCHRO_CAMERA 0x01

	#define CAMDMA_CLNK_CTRL_ENABLE_LNK (1 << 15)
	#define CAMDMA_CLNK_CTRL_NEXTLCH_ID (0x1F << 0)
	#define CAMDMA_CLNK_CTRL_NEXTLCH_ID_SHIFT 0

	#define CAMDMA_CICR_MISALIGNED_ERR_IE (1 << 11)
	#define CAMDMA_CICR_SUPERVISOR_ERR_IE (1 << 10)
	#define CAMDMA_CICR_SECURE_ERR_IE (1 << 9)
	#define CAMDMA_CICR_TRANS_ERR_IE (1 << 8)
	#define CAMDMA_CICR_PACKET_IE (1 << 7)
	#define CAMDMA_CICR_BLOCK_IE (1 << 5)
	#define CAMDMA_CICR_LAST_IE (1 << 4)
	#define CAMDMA_CICR_FRAME_IE (1 << 3)
	#define CAMDMA_CICR_HALF_IE (1 << 2)
	#define CAMDMA_CICR_DROP_IE (1 << 1)

	#define CAMDMA_CSR_MISALIGNED_ERR (1 << 11)
	#define CAMDMA_CSR_SUPERVISOR_ERR (1 << 10)
	#define CAMDMA_CSR_SECURE_ERR (1 << 9)
	#define CAMDMA_CSR_TRANS_ERR (1 << 8)
	#define CAMDMA_CSR_PACKET (1 << 7)
	#define CAMDMA_CSR_SYNC (1 << 6)
	#define CAMDMA_CSR_BLOCK (1 << 5)
	#define CAMDMA_CSR_LAST (1 << 4)
	#define CAMDMA_CSR_FRAME (1 << 3)
	#define CAMDMA_CSR_HALF (1 << 2)
	#define CAMDMA_CSR_DROP (1 << 1)

	#define CAMDMA_CSDP_SRC_ENDIANNESS (1 << 21)
	#define CAMDMA_CSDP_SRC_ENDIANNESS_LOCK (1 << 20)
	#define CAMDMA_CSDP_DST_ENDIANNESS (1 << 19)
	#define CAMDMA_CSDP_DST_ENDIANNESS_LOCK (1 << 18)
	#define CAMDMA_CSDP_WRITE_MODE (3 << 16)
	#define CAMDMA_CSDP_WRITE_MODE_WRNP (0 << 16)
	#define CAMDMA_CSDP_WRITE_MODE_POSTED (1 << 16)
	#define CAMDMA_CSDP_WRITE_MODE_POSTED_LAST_WRNP (2 << 16)
	#define CAMDMA_CSDP_DST_BURST_EN (3 << 14)
	#define CAMDMA_CSDP_DST_BURST_EN_1 (0 << 14)
	#define CAMDMA_CSDP_DST_BURST_EN_16 (1 << 14)
	#define CAMDMA_CSDP_DST_BURST_EN_32 (2 << 14)
	#define CAMDMA_CSDP_DST_BURST_EN_64 (3 << 14)
	#define CAMDMA_CSDP_DST_PACKED (1 << 13)
	#define CAMDMA_CSDP_WR_ADD_TRSLT (15 << 9)
	#define CAMDMA_CSDP_WR_ADD_TRSLT_ENABLE_MREQADD (3 << 9)
	#define CAMDMA_CSDP_SRC_BURST_EN (3 << 7)
	#define CAMDMA_CSDP_SRC_BURST_EN_1 (0 << 7)
	#define CAMDMA_CSDP_SRC_BURST_EN_16 (1 << 7)
	#define CAMDMA_CSDP_SRC_BURST_EN_32 (2 << 7)
	#define CAMDMA_CSDP_SRC_BURST_EN_64 (3 << 7)
	#define CAMDMA_CSDP_SRC_PACKED (1 << 6)
	#define CAMDMA_CSDP_RD_ADD_TRSLT (15 << 2)
	#define CAMDMA_CSDP_RD_ADD_TRSLT_ENABLE_MREQADD (3 << 2)
	#define CAMDMA_CSDP_DATA_TYPE (3 << 0)
	#define CAMDMA_CSDP_DATA_TYPE_8BITS (0 << 0)
	#define CAMDMA_CSDP_DATA_TYPE_16BITS (1 << 0)
	#define CAMDMA_CSDP_DATA_TYPE_32BITS (2 << 0)

	#define CAMMMU_SYSCONFIG_AUTOIDLE (1 << 0)

	/*
	*
	* Declarations.
	*
	*/

	/* forward declarations */
	struct omap24xxcam_sgdma;
	struct omap24xxcam_dma;

	typedef void (sgdma_callback_t)(struct omap24xxcam_sgdma cam,
	u32 status, void *arg);
	typedef void (dma_callback_t)(struct omap24xxcam_dma cam,
	u32 status, void *arg);

	struct channel_state {
	dma_callback_t callback;
	void *arg;
	};

	/* sgdma state for each of the possible videobuf_buffers + 2 overlays */
	struct sgdma_state {
	const struct scatterlist *sglist;
	int sglen; /* number of sglist entries */
	int next_sglist; /* index of next sglist entry to process */
	unsigned int bytes_read; /* number of bytes read */
	unsigned int len; /* total length of sglist (excluding
	* bytes due to page alignment) */
	int queued_sglist; /* number of sglist entries queued for DMA */
	u32 csr; /* DMA return code */
	sgdma_callback_t callback;
	void *arg;
	};

	/* physical DMA channel management */
	struct omap24xxcam_dma {
	spinlock_t lock; /* Lock for the whole structure. */

	unsigned long base; /* base address for dma controller */

	/* While dma_stop!=0, an attempt to start a new DMA transfer will
	* fail.
	*/
	atomic_t dma_stop;
	int free_dmach; /* number of dma channels free */
	int next_dmach; /* index of next dma channel to use */
	struct channel_state ch_state[NUM_CAMDMA_CHANNELS];
	};

	/* scatter-gather DMA (scatterlist stuff) management */
	struct omap24xxcam_sgdma {
	struct omap24xxcam_dma dma;

	spinlock_t lock; /* Lock for the fields below. */
	int free_sgdma; /* number of free sg dma slots */
	int next_sgdma; /* index of next sg dma slot to use */
	struct sgdma_state sg_state[NUM_SG_DMA];

	/* Reset timer data */
	struct timer_list reset_timer;
	};

	/* per-device data structure */
	struct omap24xxcam_device {
	/* mutex */
	/*
	* mutex serialises access to this structure. Also camera
	* opening and releasing is synchronised by this.
	*/
	struct mutex mutex;

	/* general driver state information */
	atomic_t users;
	/*
	* Lock to serialise core enabling and disabling and access to
	* sgdma_in_queue.
	*/
	spinlock_t core_enable_disable_lock;
	/*
	* Number or sgdma requests in scatter-gather queue, protected
	* by the lock above.
	*/
	int sgdma_in_queue;
	/*
	* Sensor interface parameters: interface type, CC_CTRL
	* register value and interface specific data.
	*/
	int if_type;
	union {
	struct parallel {
	u32 xclk;
	} bt656;
	} if_u;
	u32 cc_ctrl;

	/* subsystem structures */
	struct omap24xxcam_sgdma sgdma;

	/* hardware resources */
	unsigned int irq;
	unsigned long mmio_base;
	unsigned long mmio_base_phys;
	unsigned long mmio_size;

	/* interfaces and device */
	struct v4l2_int_device *sdev;
	struct device *dev;
	struct video_device *vfd;

	/* camera and sensor reset related stuff */
	struct work_struct sensor_reset_work;
	/*
	* We're in the middle of a reset. Don't enable core if this
	* is non-zero! This exists to help decisionmaking in a case
	* where videobuf_qbuf is called while we are in the middle of
	* a reset.
	*/
	atomic_t in_reset;
	/*
	* Non-zero if we don't want any resets for now. Used to
	* prevent reset work to run when we're about to stop
	* streaming.
	*/
	atomic_t reset_disable;

	/* video device parameters */
	int capture_mem;

	/* camera module clocks */
	struct clk *fck;
	struct clk *ick;

	/* capture data */
	/* file handle, if streaming is on */
	struct file *streaming;
	};

	/* Per-file handle data. */
	struct omap24xxcam_fh {
	spinlock_t vbq_lock; /* spinlock for the videobuf queue */
	struct videobuf_queue vbq;
	struct v4l2_pix_format pix; /* serialise pix by vbq->lock */
	atomic_t field_count; /* field counter for videobuf_buffer */
	/* accessing cam here doesn't need serialisation: it's constant */
	struct omap24xxcam_device *cam;
	};

	/*
	*
	* Register I/O functions.
	*
	*/

	static inline u32 omap24xxcam_reg_in(unsigned long base, u32 offset)
	{
	return readl(base + offset);
	}

	static inline u32 omap24xxcam_reg_out(unsigned long base, u32 offset,
	u32 val)
	{
	writel(val, base + offset);
	return val;
	}

	static inline u32 omap24xxcam_reg_merge(unsigned long base, u32 offset,
	u32 val, u32 mask)
	{
	u32 addr = base + offset;
	u32 new_val = (readl(addr) & ~mask) \| (val & mask);

	writel(new_val, addr);
	return new_val;
	}

	/*
	*
	* Function prototypes.
	*
	*/

	/* dma prototypes */

	void omap24xxcam_dma_hwinit(struct omap24xxcam_dma *dma);
	void omap24xxcam_dma_isr(struct omap24xxcam_dma *dma);

	/* sgdma prototypes */

	void omap24xxcam_sgdma_process(struct omap24xxcam_sgdma *sgdma);
	int omap24xxcam_sgdma_queue(struct omap24xxcam_sgdma *sgdma,
	const struct scatterlist *sglist, int sglen,
	int len, sgdma_callback_t callback, void *arg);
	void omap24xxcam_sgdma_sync(struct omap24xxcam_sgdma *sgdma);
	void omap24xxcam_sgdma_init(struct omap24xxcam_sgdma *sgdma,
	unsigned long base,
	void (*reset_callback)(unsigned long data),
	unsigned long reset_callback_data);
	void omap24xxcam_sgdma_exit(struct omap24xxcam_sgdma *sgdma);

	#endif