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linux/drivers/media/video/omap24xxcam.h
Sakari Ailus 39aee69a16 V4L/DVB (9815): omap2: add OMAP2 camera driver. 
Add a driver for the OMAP2 camera block. OMAP2 is used in e.g. Nokia
N800/N810 internet tablet.

This driver uses the V4L2 internal ioctl interface.

Signed-off-by: Sakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: Trilok Soni <soni.trilok@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-12-30 09:38:35 -02:00

594 lines
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/*
* 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
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