// SPDX-License-Identifier: GPL-2.0-or-later
/*
* V4L2 Driver for PXA camera host
*
* Copyright (C) 2006, Sascha Hauer, Pengutronix
* Copyright (C) 2008, Guennadi Liakhovetski <[email protected]>
* Copyright (C) 2016, Robert Jarzmik <[email protected]>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/time.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/dmaengine.h>
#include <linux/dma/pxa-dma.h>
#include <media/v4l2-async.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fwnode.h>
#include <media/videobuf2-dma-sg.h>
#include <linux/videodev2.h>
#include <linux/platform_data/media/camera-pxa.h>
#include <linux/workqueue.h>
#define PXA_CAM_VERSION "0.0.6"
#define PXA_CAM_DRV_NAME "pxa27x-camera"
#define DEFAULT_WIDTH 640
#define DEFAULT_HEIGHT 480
/* Camera Interface */
#define CICR0 0x0000
#define CICR1 0x0004
#define CICR2 0x0008
#define CICR3 0x000C
#define CICR4 0x0010
#define CISR 0x0014
#define CIFR 0x0018
#define CITOR 0x001C
#define CIBR0 0x0028
#define CIBR1 0x0030
#define CIBR2 0x0038
#define CICR0_DMAEN (1UL << 31) /* DMA request enable */
#define CICR0_PAR_EN (1 << 30) /* Parity enable */
#define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
#define CICR0_ENB (1 << 28) /* Camera interface enable */
#define CICR0_DIS (1 << 27) /* Camera interface disable */
#define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
#define CICR0_TOM (1 << 9) /* Time-out mask */
#define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
#define CICR0_FEM (1 << 7) /* FIFO-empty mask */
#define CICR0_EOLM (1 << 6) /* End-of-line mask */
#define CICR0_PERRM (1 << 5) /* Parity-error mask */
#define CICR0_QDM (1 << 4) /* Quick-disable mask */
#define CICR0_CDM (1 << 3) /* Disable-done mask */
#define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
#define CICR0_EOFM (1 << 1) /* End-of-frame mask */
#define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
#define CICR1_TBIT (1UL << 31) /* Transparency bit */
#define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
#define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
#define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
#define CICR1_RGB_F (1 << 11) /* RGB format */
#define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
#define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
#define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
#define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
#define CICR1_DW (0x7 << 0) /* Data width mask */
#define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
wait count mask */
#define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
wait count mask */
#define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
#define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
wait count mask */
#define CICR2_FSW (0x7 << 0) /* Frame stabilization
wait count mask */
#define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
wait count mask */
#define CICR3_EFW (0xff << 16) /* End-of-frame line clock
wait count mask */
#define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
#define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
wait count mask */
#define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
#define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
#define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
#define CICR4_PCP (1 << 22) /* Pixel clock polarity */
#define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
#define CICR4_VSP (1 << 20) /* Vertical sync polarity */
#define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
#define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
#define CICR4_DIV (0xff << 0) /* Clock divisor mask */
#define CISR_FTO (1 << 15) /* FIFO time-out */
#define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
#define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
#define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
#define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
#define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
#define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
#define CISR_EOL (1 << 8) /* End of line */
#define CISR_PAR_ERR (1 << 7) /* Parity error */
#define CISR_CQD (1 << 6) /* Camera interface quick disable */
#define CISR_CDD (1 << 5) /* Camera interface disable done */
#define CISR_SOF (1 << 4) /* Start of frame */
#define CISR_EOF (1 << 3) /* End of frame */
#define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
#define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
#define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
#define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
#define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
#define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
#define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
#define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
#define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
#define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
#define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
#define CICR0_SIM_MP (0 << 24)
#define CICR0_SIM_SP (1 << 24)
#define CICR0_SIM_MS (2 << 24)
#define CICR0_SIM_EP (3 << 24)
#define CICR0_SIM_ES (4 << 24)
#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
CICR0_EOFM | CICR0_FOM)
#define sensor_call(cam, o, f, args...) \
v4l2_subdev_call(cam->sensor, o, f, ##args)
/*
* Format handling
*/
/**
* enum pxa_mbus_packing - data packing types on the media-bus
* @PXA_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one
* sample represents one pixel
* @PXA_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
* possibly incomplete byte high bits are padding
* @PXA_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended
* to 16 bits
*/
enum pxa_mbus_packing {
PXA_MBUS_PACKING_NONE,
PXA_MBUS_PACKING_2X8_PADHI,
PXA_MBUS_PACKING_EXTEND16,
};
/**
* enum pxa_mbus_order - sample order on the media bus
* @PXA_MBUS_ORDER_LE: least significant sample first
* @PXA_MBUS_ORDER_BE: most significant sample first
*/
enum pxa_mbus_order {
PXA_MBUS_ORDER_LE,
PXA_MBUS_ORDER_BE,
};
/**
* enum pxa_mbus_layout - planes layout in memory
* @PXA_MBUS_LAYOUT_PACKED: color components packed
* @PXA_MBUS_LAYOUT_PLANAR_2Y_U_V: YUV components stored in 3 planes (4:2:2)
* @PXA_MBUS_LAYOUT_PLANAR_2Y_C: YUV components stored in a luma and a
* chroma plane (C plane is half the size
* of Y plane)
* @PXA_MBUS_LAYOUT_PLANAR_Y_C: YUV components stored in a luma and a
* chroma plane (C plane is the same size
* as Y plane)
*/
enum pxa_mbus_layout {
PXA_MBUS_LAYOUT_PACKED = 0,
PXA_MBUS_LAYOUT_PLANAR_2Y_U_V,
PXA_MBUS_LAYOUT_PLANAR_2Y_C,
PXA_MBUS_LAYOUT_PLANAR_Y_C,
};
/**
* struct pxa_mbus_pixelfmt - Data format on the media bus
* @name: Name of the format
* @fourcc: Fourcc code, that will be obtained if the data is
* stored in memory in the following way:
* @packing: Type of sample-packing, that has to be used
* @order: Sample order when storing in memory
* @layout: Planes layout in memory
* @bits_per_sample: How many bits the bridge has to sample
*/
struct pxa_mbus_pixelfmt {
const char *name;
u32 fourcc;
enum pxa_mbus_packing packing;
enum pxa_mbus_order order;
enum pxa_mbus_layout layout;
u8 bits_per_sample;
};
/**
* struct pxa_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through
* @code: mediabus pixel-code
* @fmt: pixel format description
*/
struct pxa_mbus_lookup {
u32 code;
struct pxa_mbus_pixelfmt fmt;
};
static const struct pxa_mbus_lookup mbus_fmt[] = {
{
.code = MEDIA_BUS_FMT_YUYV8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YUYV,
.name = "YUYV",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_YVYU8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_YVYU,
.name = "YVYU",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_UYVY8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_UYVY,
.name = "UYVY",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_VYUY8_2X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_VYUY,
.name = "VYUY",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB555,
.name = "RGB555",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB555X,
.name = "RGB555X",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_BE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_RGB565_2X8_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB565,
.name = "RGB565",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_RGB565_2X8_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB565X,
.name = "RGB565X",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_BE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SBGGR8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR8,
.name = "Bayer 8 BGGR",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGBRG8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGBRG8,
.name = "Bayer 8 GBRG",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGRBG8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG8,
.name = "Bayer 8 GRBG",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SRGGB8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SRGGB8,
.name = "Bayer 8 RGGB",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 10,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_Y8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_GREY,
.name = "Grey",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_Y10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_Y10,
.name = "Grey 10bit",
.bits_per_sample = 10,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR10,
.name = "Bayer 10 BGGR",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_BE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE,
.fmt = {
.fourcc = V4L2_PIX_FMT_RGB444,
.name = "RGB444",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_BE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_UYVY8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_UYVY,
.name = "UYVY 16bit",
.bits_per_sample = 16,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_VYUY8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_VYUY,
.name = "VYUY 16bit",
.bits_per_sample = 16,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_YUYV8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_YUYV,
.name = "YUYV 16bit",
.bits_per_sample = 16,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_YVYU8_1X16,
.fmt = {
.fourcc = V4L2_PIX_FMT_YVYU,
.name = "YVYU 16bit",
.bits_per_sample = 16,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG10DPCM8,
.name = "Bayer 10 BGGR DPCM 8",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_NONE,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGBRG10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGBRG10,
.name = "Bayer 10 GBRG",
.bits_per_sample = 10,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGRBG10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG10,
.name = "Bayer 10 GRBG",
.bits_per_sample = 10,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
.fmt = {
.fourcc = V4L2_PIX_FMT_SRGGB10,
.name = "Bayer 10 RGGB",
.bits_per_sample = 10,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SBGGR12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SBGGR12,
.name = "Bayer 12 BGGR",
.bits_per_sample = 12,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGBRG12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGBRG12,
.name = "Bayer 12 GBRG",
.bits_per_sample = 12,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SGRBG12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SGRBG12,
.name = "Bayer 12 GRBG",
.bits_per_sample = 12,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
}, {
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
.fmt = {
.fourcc = V4L2_PIX_FMT_SRGGB12,
.name = "Bayer 12 RGGB",
.bits_per_sample = 12,
.packing = PXA_MBUS_PACKING_EXTEND16,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PACKED,
},
},
};
static s32 pxa_mbus_bytes_per_line(u32 width, const struct pxa_mbus_pixelfmt *mf)
{
if (mf->layout != PXA_MBUS_LAYOUT_PACKED)
return width * mf->bits_per_sample / 8;
switch (mf->packing) {
case PXA_MBUS_PACKING_NONE:
return width * mf->bits_per_sample / 8;
case PXA_MBUS_PACKING_2X8_PADHI:
case PXA_MBUS_PACKING_EXTEND16:
return width * 2;
}
return -EINVAL;
}
static s32 pxa_mbus_image_size(const struct pxa_mbus_pixelfmt *mf,
u32 bytes_per_line, u32 height)
{
if (mf->layout == PXA_MBUS_LAYOUT_PACKED)
return bytes_per_line * height;
switch (mf->packing) {
case PXA_MBUS_PACKING_2X8_PADHI:
return bytes_per_line * height * 2;
default:
return -EINVAL;
}
}
static const struct pxa_mbus_pixelfmt *pxa_mbus_find_fmtdesc(
u32 code,
const struct pxa_mbus_lookup *lookup,
int n)
{
int i;
for (i = 0; i < n; i++)
if (lookup[i].code == code)
return &lookup[i].fmt;
return NULL;
}
static const struct pxa_mbus_pixelfmt *pxa_mbus_get_fmtdesc(
u32 code)
{
return pxa_mbus_find_fmtdesc(code, mbus_fmt, ARRAY_SIZE(mbus_fmt));
}
/**
* struct pxa_camera_format_xlate - match between host and sensor formats
* @code: code of a sensor provided format
* @host_fmt: host format after host translation from code
*
* Host and sensor translation structure. Used in table of host and sensor
* formats matchings in pxa_camera_device. A host can override the generic list
* generation by implementing get_formats(), and use it for format checks and
* format setup.
*/
struct pxa_camera_format_xlate {
u32 code;
const struct pxa_mbus_pixelfmt *host_fmt;
};
/*
* Structures
*/
enum pxa_camera_active_dma {
DMA_Y = 0x1,
DMA_U = 0x2,
DMA_V = 0x4,
};
/* buffer for one video frame */
struct pxa_buffer {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vbuf;
struct list_head queue;
u32 code;
int nb_planes;
/* our descriptor lists for Y, U and V channels */
struct dma_async_tx_descriptor *descs[3];
dma_cookie_t cookie[3];
struct scatterlist *sg[3];
int sg_len[3];
size_t plane_sizes[3];
int inwork;
enum pxa_camera_active_dma active_dma;
};
struct pxa_camera_dev {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct v4l2_async_notifier notifier;
struct vb2_queue vb2_vq;
struct v4l2_subdev *sensor;
struct pxa_camera_format_xlate *user_formats;
const struct pxa_camera_format_xlate *current_fmt;
struct v4l2_pix_format current_pix;
/*
* PXA27x is only supposed to handle one camera on its Quick Capture
* interface. If anyone ever builds hardware to enable more than
* one camera, they will have to modify this driver too
*/
struct clk *clk;
unsigned int irq;
void __iomem *base;
int channels;
struct dma_chan *dma_chans[3];
struct pxacamera_platform_data *pdata;
struct resource *res;
unsigned long platform_flags;
unsigned long ciclk;
unsigned long mclk;
u32 mclk_divisor;
u16 width_flags; /* max 10 bits */
struct list_head capture;
spinlock_t lock;
struct mutex mlock;
unsigned int buf_sequence;
struct pxa_buffer *active;
struct work_struct eof_bh_work;
u32 save_cicr[5];
};
struct pxa_cam {
unsigned long flags;
};
static const char *pxa_cam_driver_description = "PXA_Camera";
/*
* Format translation functions
*/
static const struct pxa_camera_format_xlate
*pxa_mbus_xlate_by_fourcc(struct pxa_camera_format_xlate *user_formats,
unsigned int fourcc)
{
unsigned int i;
for (i = 0; user_formats[i].code; i++)
if (user_formats[i].host_fmt->fourcc == fourcc)
return user_formats + i;
return NULL;
}
static struct pxa_camera_format_xlate *pxa_mbus_build_fmts_xlate(
struct v4l2_device *v4l2_dev, struct v4l2_subdev *subdev,
int (*get_formats)(struct v4l2_device *, unsigned int,
struct pxa_camera_format_xlate *xlate))
{
unsigned int i, fmts = 0, raw_fmts = 0;
int ret;
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
struct pxa_camera_format_xlate *user_formats;
while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
raw_fmts++;
code.index++;
}
/*
* First pass - only count formats this host-sensor
* configuration can provide
*/
for (i = 0; i < raw_fmts; i++) {
ret = get_formats(v4l2_dev, i, NULL);
if (ret < 0)
return ERR_PTR(ret);
fmts += ret;
}
if (!fmts)
return ERR_PTR(-ENXIO);
user_formats = kcalloc(fmts + 1, sizeof(*user_formats), GFP_KERNEL);
if (!user_formats)
return ERR_PTR(-ENOMEM);
/* Second pass - actually fill data formats */
fmts = 0;
for (i = 0; i < raw_fmts; i++) {
ret = get_formats(v4l2_dev, i, user_formats + fmts);
if (ret < 0)
goto egfmt;
fmts += ret;
}
user_formats[fmts].code = 0;
return user_formats;
egfmt:
kfree(user_formats);
return ERR_PTR(ret);
}
/*
* Videobuf operations
*/
static struct pxa_buffer *vb2_to_pxa_buffer(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
return container_of(vbuf, struct pxa_buffer, vbuf);
}
static struct device *pcdev_to_dev(struct pxa_camera_dev *pcdev)
{
return pcdev->v4l2_dev.dev;
}
static struct pxa_camera_dev *v4l2_dev_to_pcdev(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct pxa_camera_dev, v4l2_dev);
}
static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
enum pxa_camera_active_dma act_dma);
static void pxa_camera_dma_irq_y(void *data)
{
struct pxa_camera_dev *pcdev = data;
pxa_camera_dma_irq(pcdev, DMA_Y);
}
static void pxa_camera_dma_irq_u(void *data)
{
struct pxa_camera_dev *pcdev = data;
pxa_camera_dma_irq(pcdev, DMA_U);
}
static void pxa_camera_dma_irq_v(void *data)
{
struct pxa_camera_dev *pcdev = data;
pxa_camera_dma_irq(pcdev, DMA_V);
}
/**
* pxa_init_dma_channel - init dma descriptors
* @pcdev: pxa camera device
* @buf: pxa camera buffer
* @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
* @sg: dma scatter list
* @sglen: dma scatter list length
*
* Prepares the pxa dma descriptors to transfer one camera channel.
*
* Returns 0 if success or -ENOMEM if no memory is available
*/
static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
struct pxa_buffer *buf, int channel,
struct scatterlist *sg, int sglen)
{
struct dma_chan *dma_chan = pcdev->dma_chans[channel];
struct dma_async_tx_descriptor *tx;
tx = dmaengine_prep_slave_sg(dma_chan, sg, sglen, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_REUSE);
if (!tx) {
dev_err(pcdev_to_dev(pcdev),
"dmaengine_prep_slave_sg failed\n");
goto fail;
}
tx->callback_param = pcdev;
switch (channel) {
case 0:
tx->callback = pxa_camera_dma_irq_y;
break;
case 1:
tx->callback = pxa_camera_dma_irq_u;
break;
case 2:
tx->callback = pxa_camera_dma_irq_v;
break;
}
buf->descs[channel] = tx;
return 0;
fail:
dev_dbg(pcdev_to_dev(pcdev),
"%s (vb=%p) dma_tx=%p\n",
__func__, buf, tx);
return -ENOMEM;
}
static void pxa_video_buf_set_actdma(struct pxa_camera_dev *pcdev,
struct pxa_buffer *buf)
{
buf->active_dma = DMA_Y;
if (buf->nb_planes == 3)
buf->active_dma |= DMA_U | DMA_V;
}
/**
* pxa_dma_start_channels - start DMA channel for active buffer
* @pcdev: pxa camera device
*
* Initialize DMA channels to the beginning of the active video buffer, and
* start these channels.
*/
static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev)
{
int i;
for (i = 0; i < pcdev->channels; i++) {
dev_dbg(pcdev_to_dev(pcdev),
"%s (channel=%d)\n", __func__, i);
dma_async_issue_pending(pcdev->dma_chans[i]);
}
}
static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev)
{
int i;
for (i = 0; i < pcdev->channels; i++) {
dev_dbg(pcdev_to_dev(pcdev),
"%s (channel=%d)\n", __func__, i);
dmaengine_terminate_all(pcdev->dma_chans[i]);
}
}
static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev,
struct pxa_buffer *buf)
{
int i;
for (i = 0; i < pcdev->channels; i++) {
buf->cookie[i] = dmaengine_submit(buf->descs[i]);
dev_dbg(pcdev_to_dev(pcdev),
"%s (channel=%d) : submit vb=%p cookie=%d\n",
__func__, i, buf, buf->descs[i]->cookie);
}
}
/**
* pxa_camera_start_capture - start video capturing
* @pcdev: camera device
*
* Launch capturing. DMA channels should not be active yet. They should get
* activated at the end of frame interrupt, to capture only whole frames, and
* never begin the capture of a partial frame.
*/
static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
{
unsigned long cicr0;
dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
__raw_writel(__raw_readl(pcdev->base + CISR), pcdev->base + CISR);
/* Enable End-Of-Frame Interrupt */
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
cicr0 &= ~CICR0_EOFM;
__raw_writel(cicr0, pcdev->base + CICR0);
}
static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev)
{
unsigned long cicr0;
pxa_dma_stop_channels(pcdev);
cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
__raw_writel(cicr0, pcdev->base + CICR0);
pcdev->active = NULL;
dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
}
static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
struct pxa_buffer *buf,
enum vb2_buffer_state state)
{
struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
/* _init is used to debug races, see comment in pxa_camera_reqbufs() */
list_del_init(&buf->queue);
vb->timestamp = ktime_get_ns();
vbuf->sequence = pcdev->buf_sequence++;
vbuf->field = V4L2_FIELD_NONE;
vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
dev_dbg(pcdev_to_dev(pcdev), "%s dequeued buffer (buf=0x%p)\n",
__func__, buf);
if (list_empty(&pcdev->capture)) {
pxa_camera_stop_capture(pcdev);
return;
}
pcdev->active = list_entry(pcdev->capture.next,
struct pxa_buffer, queue);
}
/**
* pxa_camera_check_link_miss - check missed DMA linking
* @pcdev: camera device
* @last_submitted: an opaque DMA cookie for last submitted
* @last_issued: an opaque DMA cookie for last issued
*
* The DMA chaining is done with DMA running. This means a tiny temporal window
* remains, where a buffer is queued on the chain, while the chain is already
* stopped. This means the tailed buffer would never be transferred by DMA.
* This function restarts the capture for this corner case, where :
* - DADR() == DADDR_STOP
* - a video buffer is queued on the pcdev->capture list
*
* Please check the "DMA hot chaining timeslice issue" in
* Documentation/driver-api/media/drivers/pxa_camera.rst
*
* Context: should only be called within the dma irq handler
*/
static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev,
dma_cookie_t last_submitted,
dma_cookie_t last_issued)
{
bool is_dma_stopped = last_submitted != last_issued;
dev_dbg(pcdev_to_dev(pcdev),
"%s : top queued buffer=%p, is_dma_stopped=%d\n",
__func__, pcdev->active, is_dma_stopped);
if (pcdev->active && is_dma_stopped)
pxa_camera_start_capture(pcdev);
}
static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
enum pxa_camera_active_dma act_dma)
{
struct pxa_buffer *buf, *last_buf;
unsigned long flags;
u32 camera_status, overrun;
int chan;
enum dma_status last_status;
dma_cookie_t last_issued;
spin_lock_irqsave(&pcdev->lock, flags);
camera_status = __raw_readl(pcdev->base + CISR);
dev_dbg(pcdev_to_dev(pcdev), "camera dma irq, cisr=0x%x dma=%d\n",
camera_status, act_dma);
overrun = CISR_IFO_0;
if (pcdev->channels == 3)
overrun |= CISR_IFO_1 | CISR_IFO_2;
/*
* pcdev->active should not be NULL in DMA irq handler.
*
* But there is one corner case : if capture was stopped due to an
* overrun of channel 1, and at that same channel 2 was completed.
*
* When handling the overrun in DMA irq for channel 1, we'll stop the
* capture and restart it (and thus set pcdev->active to NULL). But the
* DMA irq handler will already be pending for channel 2. So on entering
* the DMA irq handler for channel 2 there will be no active buffer, yet
* that is normal.
*/
if (!pcdev->active)
goto out;
buf = pcdev->active;
WARN_ON(buf->inwork || list_empty(&buf->queue));
/*
* It's normal if the last frame creates an overrun, as there
* are no more DMA descriptors to fetch from QCI fifos
*/
switch (act_dma) {
case DMA_U:
chan = 1;
break;
case DMA_V:
chan = 2;
break;
default:
chan = 0;
break;
}
last_buf = list_entry(pcdev->capture.prev,
struct pxa_buffer, queue);
last_status = dma_async_is_tx_complete(pcdev->dma_chans[chan],
last_buf->cookie[chan],
NULL, &last_issued);
if (camera_status & overrun &&
last_status != DMA_COMPLETE) {
dev_dbg(pcdev_to_dev(pcdev), "FIFO overrun! CISR: %x\n",
camera_status);
pxa_camera_stop_capture(pcdev);
list_for_each_entry(buf, &pcdev->capture, queue)
pxa_dma_add_tail_buf(pcdev, buf);
pxa_camera_start_capture(pcdev);
goto out;
}
buf->active_dma &= ~act_dma;
if (!buf->active_dma) {
pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_DONE);
pxa_camera_check_link_miss(pcdev, last_buf->cookie[chan],
last_issued);
}
out:
spin_unlock_irqrestore(&pcdev->lock, flags);
}
static u32 mclk_get_divisor(struct platform_device *pdev,
struct pxa_camera_dev *pcdev)
{
unsigned long mclk = pcdev->mclk;
u32 div;
unsigned long lcdclk;
lcdclk = clk_get_rate(pcdev->clk);
pcdev->ciclk = lcdclk;
/* mclk <= ciclk / 4 (27.4.2) */
if (mclk > lcdclk / 4) {
mclk = lcdclk / 4;
dev_warn(&pdev->dev,
"Limiting master clock to %lu\n", mclk);
}
/* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
/* If we're not supplying MCLK, leave it at 0 */
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
pcdev->mclk = lcdclk / (2 * (div + 1));
dev_dbg(&pdev->dev, "LCD clock %luHz, target freq %luHz, divisor %u\n",
lcdclk, mclk, div);
return div;
}
static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
unsigned long pclk)
{
/* We want a timeout > 1 pixel time, not ">=" */
u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
__raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
}
static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
{
u32 cicr4 = 0;
/* disable all interrupts */
__raw_writel(0x3ff, pcdev->base + CICR0);
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
cicr4 |= CICR4_PCLK_EN;
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
cicr4 |= CICR4_MCLK_EN;
if (pcdev->platform_flags & PXA_CAMERA_PCP)
cicr4 |= CICR4_PCP;
if (pcdev->platform_flags & PXA_CAMERA_HSP)
cicr4 |= CICR4_HSP;
if (pcdev->platform_flags & PXA_CAMERA_VSP)
cicr4 |= CICR4_VSP;
__raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
/* Initialise the timeout under the assumption pclk = mclk */
recalculate_fifo_timeout(pcdev, pcdev->mclk);
else
/* "Safe default" - 13MHz */
recalculate_fifo_timeout(pcdev, 13000000);
clk_prepare_enable(pcdev->clk);
}
static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
{
clk_disable_unprepare(pcdev->clk);
}
static void pxa_camera_eof_bh_work(struct work_struct *t)
{
struct pxa_camera_dev *pcdev = from_work(pcdev, t, eof_bh_work);
unsigned long cifr;
struct pxa_buffer *buf;
dev_dbg(pcdev_to_dev(pcdev),
"Camera interrupt status 0x%x\n",
__raw_readl(pcdev->base + CISR));
/* Reset the FIFOs */
cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
__raw_writel(cifr, pcdev->base + CIFR);
pcdev->active = list_first_entry(&pcdev->capture,
struct pxa_buffer, queue);
buf = pcdev->active;
pxa_video_buf_set_actdma(pcdev, buf);
pxa_dma_start_channels(pcdev);
}
static irqreturn_t pxa_camera_irq(int irq, void *data)
{
struct pxa_camera_dev *pcdev = data;
unsigned long status, cicr0;
status = __raw_readl(pcdev->base + CISR);
dev_dbg(pcdev_to_dev(pcdev),
"Camera interrupt status 0x%lx\n", status);
if (!status)
return IRQ_NONE;
__raw_writel(status, pcdev->base + CISR);
if (status & CISR_EOF) {
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
__raw_writel(cicr0, pcdev->base + CICR0);
queue_work(system_bh_wq, &pcdev->eof_bh_work);
}
return IRQ_HANDLED;
}
static void pxa_camera_setup_cicr(struct pxa_camera_dev *pcdev,
unsigned long flags, __u32 pixfmt)
{
unsigned long dw, bpp;
u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0, y_skip_top;
int ret = sensor_call(pcdev, sensor, g_skip_top_lines, &y_skip_top);
if (ret < 0)
y_skip_top = 0;
/*
* Datawidth is now guaranteed to be equal to one of the three values.
* We fix bit-per-pixel equal to data-width...
*/
switch (pcdev->current_fmt->host_fmt->bits_per_sample) {
case 10:
dw = 4;
bpp = 0x40;
break;
case 9:
dw = 3;
bpp = 0x20;
break;
default:
/*
* Actually it can only be 8 now,
* default is just to silence compiler warnings
*/
case 8:
dw = 2;
bpp = 0;
}
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
cicr4 |= CICR4_PCLK_EN;
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
cicr4 |= CICR4_MCLK_EN;
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
cicr4 |= CICR4_PCP;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
cicr4 |= CICR4_HSP;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
cicr4 |= CICR4_VSP;
cicr0 = __raw_readl(pcdev->base + CICR0);
if (cicr0 & CICR0_ENB)
__raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
cicr1 = CICR1_PPL_VAL(pcdev->current_pix.width - 1) | bpp | dw;
switch (pixfmt) {
case V4L2_PIX_FMT_YUV422P:
pcdev->channels = 3;
cicr1 |= CICR1_YCBCR_F;
/*
* Normally, pxa bus wants as input UYVY format. We allow all
* reorderings of the YUV422 format, as no processing is done,
* and the YUV stream is just passed through without any
* transformation. Note that UYVY is the only format that
* should be used if pxa framebuffer Overlay2 is used.
*/
fallthrough;
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
cicr1 |= CICR1_COLOR_SP_VAL(2);
break;
case V4L2_PIX_FMT_RGB555:
cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
break;
case V4L2_PIX_FMT_RGB565:
cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
break;
}
cicr2 = 0;
cicr3 = CICR3_LPF_VAL(pcdev->current_pix.height - 1) |
CICR3_BFW_VAL(min((u32)255, y_skip_top));
cicr4 |= pcdev->mclk_divisor;
__raw_writel(cicr1, pcdev->base + CICR1);
__raw_writel(cicr2, pcdev->base + CICR2);
__raw_writel(cicr3, pcdev->base + CICR3);
__raw_writel(cicr4, pcdev->base + CICR4);
/* CIF interrupts are not used, only DMA */
cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ?
CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
__raw_writel(cicr0, pcdev->base + CICR0);
}
/*
* Videobuf2 section
*/
static void pxa_buffer_cleanup(struct pxa_buffer *buf)
{
int i;
for (i = 0; i < 3 && buf->descs[i]; i++) {
dmaengine_desc_free(buf->descs[i]);
kfree(buf->sg[i]);
buf->descs[i] = NULL;
buf->sg[i] = NULL;
buf->sg_len[i] = 0;
buf->plane_sizes[i] = 0;
}
buf->nb_planes = 0;
}
static int pxa_buffer_init(struct pxa_camera_dev *pcdev,
struct pxa_buffer *buf)
{
struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
int nb_channels = pcdev->channels;
int i, ret = 0;
unsigned long size = vb2_plane_size(vb, 0);
switch (nb_channels) {
case 1:
buf->plane_sizes[0] = size;
break;
case 3:
buf->plane_sizes[0] = size / 2;
buf->plane_sizes[1] = size / 4;
buf->plane_sizes[2] = size / 4;
break;
default:
return -EINVAL;
}
buf->nb_planes = nb_channels;
ret = sg_split(sgt->sgl, sgt->nents, 0, nb_channels,
buf->plane_sizes, buf->sg, buf->sg_len, GFP_KERNEL);
if (ret < 0) {
dev_err(pcdev_to_dev(pcdev),
"sg_split failed: %d\n", ret);
return ret;
}
for (i = 0; i < nb_channels; i++) {
ret = pxa_init_dma_channel(pcdev, buf, i,
buf->sg[i], buf->sg_len[i]);
if (ret) {
pxa_buffer_cleanup(buf);
return ret;
}
}
INIT_LIST_HEAD(&buf->queue);
return ret;
}
static void pxac_vb2_cleanup(struct vb2_buffer *vb)
{
struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
dev_dbg(pcdev_to_dev(pcdev),
"%s(vb=%p)\n", __func__, vb);
pxa_buffer_cleanup(buf);
}
static void pxac_vb2_queue(struct vb2_buffer *vb)
{
struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
dev_dbg(pcdev_to_dev(pcdev),
"%s(vb=%p) nb_channels=%d size=%lu active=%p\n",
__func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0),
pcdev->active);
list_add_tail(&buf->queue, &pcdev->capture);
pxa_dma_add_tail_buf(pcdev, buf);
}
/*
* Please check the DMA prepared buffer structure in :
* Documentation/driver-api/media/drivers/pxa_camera.rst
* Please check also in pxa_camera_check_link_miss() to understand why DMA chain
* modification while DMA chain is running will work anyway.
*/
static int pxac_vb2_prepare(struct vb2_buffer *vb)
{
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
int ret = 0;
#ifdef DEBUG
int i;
#endif
switch (pcdev->channels) {
case 1:
case 3:
vb2_set_plane_payload(vb, 0, pcdev->current_pix.sizeimage);
break;
default:
return -EINVAL;
}
dev_dbg(pcdev_to_dev(pcdev),
"%s (vb=%p) nb_channels=%d size=%lu\n",
__func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0));
WARN_ON(!pcdev->current_fmt);
#ifdef DEBUG
/*
* This can be useful if you want to see if we actually fill
* the buffer with something
*/
for (i = 0; i < vb->num_planes; i++)
memset((void *)vb2_plane_vaddr(vb, i),
0xaa, vb2_get_plane_payload(vb, i));
#endif
/*
* I think, in buf_prepare you only have to protect global data,
* the actual buffer is yours
*/
buf->inwork = 0;
pxa_video_buf_set_actdma(pcdev, buf);
return ret;
}
static int pxac_vb2_init(struct vb2_buffer *vb)
{
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
dev_dbg(pcdev_to_dev(pcdev),
"%s(nb_channels=%d)\n",
__func__, pcdev->channels);
return pxa_buffer_init(pcdev, buf);
}
static int pxac_vb2_queue_setup(struct vb2_queue *vq,
unsigned int *nbufs,
unsigned int *num_planes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
int size = pcdev->current_pix.sizeimage;
dev_dbg(pcdev_to_dev(pcdev),
"%s(vq=%p nbufs=%d num_planes=%d size=%d)\n",
__func__, vq, *nbufs, *num_planes, size);
/*
* Called from VIDIOC_REQBUFS or in compatibility mode For YUV422P
* format, even if there are 3 planes Y, U and V, we reply there is only
* one plane, containing Y, U and V data, one after the other.
*/
if (*num_planes)
return sizes[0] < size ? -EINVAL : 0;
*num_planes = 1;
switch (pcdev->channels) {
case 1:
case 3:
sizes[0] = size;
break;
default:
return -EINVAL;
}
if (!*nbufs)
*nbufs = 1;
return 0;
}
static int pxac_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
dev_dbg(pcdev_to_dev(pcdev), "%s(count=%d) active=%p\n",
__func__, count, pcdev->active);
pcdev->buf_sequence = 0;
if (!pcdev->active)
pxa_camera_start_capture(pcdev);
return 0;
}
static void pxac_vb2_stop_streaming(struct vb2_queue *vq)
{
struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
struct pxa_buffer *buf, *tmp;
dev_dbg(pcdev_to_dev(pcdev), "%s active=%p\n",
__func__, pcdev->active);
pxa_camera_stop_capture(pcdev);
list_for_each_entry_safe(buf, tmp, &pcdev->capture, queue)
pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_ERROR);
}
static const struct vb2_ops pxac_vb2_ops = {
.queue_setup = pxac_vb2_queue_setup,
.buf_init = pxac_vb2_init,
.buf_prepare = pxac_vb2_prepare,
.buf_queue = pxac_vb2_queue,
.buf_cleanup = pxac_vb2_cleanup,
.start_streaming = pxac_vb2_start_streaming,
.stop_streaming = pxac_vb2_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int pxa_camera_init_videobuf2(struct pxa_camera_dev *pcdev)
{
int ret;
struct vb2_queue *vq = &pcdev->vb2_vq;
memset(vq, 0, sizeof(*vq));
vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
vq->drv_priv = pcdev;
vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vq->buf_struct_size = sizeof(struct pxa_buffer);
vq->dev = pcdev->v4l2_dev.dev;
vq->ops = &pxac_vb2_ops;
vq->mem_ops = &vb2_dma_sg_memops;
vq->lock = &pcdev->mlock;
ret = vb2_queue_init(vq);
dev_dbg(pcdev_to_dev(pcdev),
"vb2_queue_init(vq=%p): %d\n", vq, ret);
return ret;
}
/*
* Video ioctls section
*/
static int pxa_camera_set_bus_param(struct pxa_camera_dev *pcdev)
{
unsigned int bus_width = pcdev->current_fmt->host_fmt->bits_per_sample;
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
u32 pixfmt = pcdev->current_fmt->host_fmt->fourcc;
int mbus_config;
int ret;
if (!((1 << (bus_width - 1)) & pcdev->width_flags)) {
dev_err(pcdev_to_dev(pcdev), "Unsupported bus width %u",
bus_width);
return -EINVAL;
}
pcdev->channels = 1;
/* Make choices, based on platform preferences */
mbus_config = 0;
if (pcdev->platform_flags & PXA_CAMERA_MASTER)
mbus_config |= V4L2_MBUS_MASTER;
else
mbus_config |= V4L2_MBUS_SLAVE;
if (pcdev->platform_flags & PXA_CAMERA_HSP)
mbus_config |= V4L2_MBUS_HSYNC_ACTIVE_HIGH;
else
mbus_config |= V4L2_MBUS_HSYNC_ACTIVE_LOW;
if (pcdev->platform_flags & PXA_CAMERA_VSP)
mbus_config |= V4L2_MBUS_VSYNC_ACTIVE_HIGH;
else
mbus_config |= V4L2_MBUS_VSYNC_ACTIVE_LOW;
if (pcdev->platform_flags & PXA_CAMERA_PCP)
mbus_config |= V4L2_MBUS_PCLK_SAMPLE_RISING;
else
mbus_config |= V4L2_MBUS_PCLK_SAMPLE_FALLING;
mbus_config |= V4L2_MBUS_DATA_ACTIVE_HIGH;
ret = sensor_call(pcdev, pad, get_mbus_config, 0, &cfg);
if (ret < 0 && ret != -ENOIOCTLCMD) {
dev_err(pcdev_to_dev(pcdev),
"Failed to call get_mbus_config: %d\n", ret);
return ret;
}
/*
* If the media bus configuration of the sensor differs, make sure it
* is supported by the platform.
*
* PXA does not support V4L2_MBUS_DATA_ACTIVE_LOW and the bus mastering
* roles should match.
*/
if (cfg.bus.parallel.flags != mbus_config) {
unsigned int pxa_mbus_role = mbus_config & (V4L2_MBUS_MASTER |
V4L2_MBUS_SLAVE);
unsigned int flags = cfg.bus.parallel.flags;
if (pxa_mbus_role != (flags & (V4L2_MBUS_MASTER |
V4L2_MBUS_SLAVE))) {
dev_err(pcdev_to_dev(pcdev),
"Unsupported mbus configuration: bus mastering\n");
return -EINVAL;
}
if (flags & V4L2_MBUS_DATA_ACTIVE_LOW) {
dev_err(pcdev_to_dev(pcdev),
"Unsupported mbus configuration: DATA_ACTIVE_LOW\n");
return -EINVAL;
}
}
pxa_camera_setup_cicr(pcdev, cfg.bus.parallel.flags, pixfmt);
return 0;
}
static const struct pxa_mbus_pixelfmt pxa_camera_formats[] = {
{
.fourcc = V4L2_PIX_FMT_YUV422P,
.name = "Planar YUV422 16 bit",
.bits_per_sample = 8,
.packing = PXA_MBUS_PACKING_2X8_PADHI,
.order = PXA_MBUS_ORDER_LE,
.layout = PXA_MBUS_LAYOUT_PLANAR_2Y_U_V,
},
};
/* This will be corrected as we get more formats */
static bool pxa_camera_packing_supported(const struct pxa_mbus_pixelfmt *fmt)
{
return fmt->packing == PXA_MBUS_PACKING_NONE ||
(fmt->bits_per_sample == 8 &&
fmt->packing == PXA_MBUS_PACKING_2X8_PADHI) ||
(fmt->bits_per_sample > 8 &&
fmt->packing == PXA_MBUS_PACKING_EXTEND16);
}
static int pxa_camera_get_formats(struct v4l2_device *v4l2_dev,
unsigned int idx,
struct pxa_camera_format_xlate *xlate)
{
struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
int formats = 0, ret;
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.index = idx,
};
const struct pxa_mbus_pixelfmt *fmt;
ret = sensor_call(pcdev, pad, enum_mbus_code, NULL, &code);
if (ret < 0)
/* No more formats */
return 0;
fmt = pxa_mbus_get_fmtdesc(code.code);
if (!fmt) {
dev_err(pcdev_to_dev(pcdev),
"Invalid format code #%u: %d\n", idx, code.code);
return 0;
}
switch (code.code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
formats++;
if (xlate) {
xlate->host_fmt = &pxa_camera_formats[0];
xlate->code = code.code;
xlate++;
dev_dbg(pcdev_to_dev(pcdev),
"Providing format %s using code %d\n",
pxa_camera_formats[0].name, code.code);
}
fallthrough;
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YVYU8_2X8:
case MEDIA_BUS_FMT_RGB565_2X8_LE:
case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
if (xlate)
dev_dbg(pcdev_to_dev(pcdev),
"Providing format %s packed\n",
fmt->name);
break;
default:
if (!pxa_camera_packing_supported(fmt))
return 0;
if (xlate)
dev_dbg(pcdev_to_dev(pcdev),
"Providing format %s in pass-through mode\n",
fmt->name);
break;
}
/* Generic pass-through */
formats++;
if (xlate) {
xlate->host_fmt = fmt;
xlate->code = code.code;
xlate++;
}
return formats;
}
static int pxa_camera_build_formats(struct pxa_camera_dev *pcdev)
{
struct pxa_camera_format_xlate *xlate;
xlate = pxa_mbus_build_fmts_xlate(&pcdev->v4l2_dev, pcdev->sensor,
pxa_camera_get_formats);
if (IS_ERR(xlate))
return PTR_ERR(xlate);
pcdev->user_formats = xlate;
return 0;
}
static void pxa_camera_destroy_formats(struct pxa_camera_dev *pcdev)
{
kfree(pcdev->user_formats);
}
static int pxa_camera_check_frame(u32 width, u32 height)
{
/* limit to pxa hardware capabilities */
return height < 32 || height > 2048 || width < 48 || width > 2048 ||
(width & 0x01);
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int pxac_vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct pxa_camera_dev *pcdev = video_drvdata(file);
if (reg->reg > CIBR2)
return -ERANGE;
reg->val = __raw_readl(pcdev->base + reg->reg);
reg->size = sizeof(__u32);
return 0;
}
static int pxac_vidioc_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
struct pxa_camera_dev *pcdev = video_drvdata(file);
if (reg->reg > CIBR2)
return -ERANGE;
if (reg->size != sizeof(__u32))
return -EINVAL;
__raw_writel(reg->val, pcdev->base + reg->reg);
return 0;
}
#endif
static int pxac_vidioc_enum_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_fmtdesc *f)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
const struct pxa_mbus_pixelfmt *format;
unsigned int idx;
for (idx = 0; pcdev->user_formats[idx].code; idx++);
if (f->index >= idx)
return -EINVAL;
format = pcdev->user_formats[f->index].host_fmt;
f->pixelformat = format->fourcc;
return 0;
}
static int pxac_vidioc_g_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *f)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->width = pcdev->current_pix.width;
pix->height = pcdev->current_pix.height;
pix->bytesperline = pcdev->current_pix.bytesperline;
pix->sizeimage = pcdev->current_pix.sizeimage;
pix->field = pcdev->current_pix.field;
pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
pix->colorspace = pcdev->current_pix.colorspace;
dev_dbg(pcdev_to_dev(pcdev), "current_fmt->fourcc: 0x%08x\n",
pcdev->current_fmt->host_fmt->fourcc);
return 0;
}
static int pxac_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *f)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
const struct pxa_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_subdev_pad_config pad_cfg;
struct v4l2_subdev_state pad_state = {
.pads = &pad_cfg,
};
struct v4l2_subdev_format format = {
.which = V4L2_SUBDEV_FORMAT_TRY,
};
struct v4l2_mbus_framefmt *mf = &format.format;
__u32 pixfmt = pix->pixelformat;
int ret;
xlate = pxa_mbus_xlate_by_fourcc(pcdev->user_formats, pixfmt);
if (!xlate) {
dev_warn(pcdev_to_dev(pcdev), "Format %x not found\n", pixfmt);
return -EINVAL;
}
/*
* Limit to pxa hardware capabilities. YUV422P planar format requires
* images size to be a multiple of 16 bytes. If not, zeros will be
* inserted between Y and U planes, and U and V planes, which violates
* the YUV422P standard.
*/
v4l_bound_align_image(&pix->width, 48, 2048, 1,
&pix->height, 32, 2048, 0,
pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0);
v4l2_fill_mbus_format(mf, pix, xlate->code);
ret = sensor_call(pcdev, pad, set_fmt, &pad_state, &format);
if (ret < 0)
return ret;
v4l2_fill_pix_format(pix, mf);
/* Only progressive video supported so far */
switch (mf->field) {
case V4L2_FIELD_ANY:
case V4L2_FIELD_NONE:
pix->field = V4L2_FIELD_NONE;
break;
default:
/* TODO: support interlaced at least in pass-through mode */
dev_err(pcdev_to_dev(pcdev), "Field type %d unsupported.\n",
mf->field);
return -EINVAL;
}
ret = pxa_mbus_bytes_per_line(pix->width, xlate->host_fmt);
if (ret < 0)
return ret;
pix->bytesperline = ret;
ret = pxa_mbus_image_size(xlate->host_fmt, pix->bytesperline,
pix->height);
if (ret < 0)
return ret;
pix->sizeimage = ret;
return 0;
}
static int pxac_vidioc_s_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *f)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
const struct pxa_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_subdev_format format = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
unsigned long flags;
int ret, is_busy;
dev_dbg(pcdev_to_dev(pcdev),
"s_fmt_vid_cap(pix=%dx%d:%x)\n",
pix->width, pix->height, pix->pixelformat);
spin_lock_irqsave(&pcdev->lock, flags);
is_busy = pcdev->active || vb2_is_busy(&pcdev->vb2_vq);
spin_unlock_irqrestore(&pcdev->lock, flags);
if (is_busy)
return -EBUSY;
ret = pxac_vidioc_try_fmt_vid_cap(filp, priv, f);
if (ret)
return ret;
xlate = pxa_mbus_xlate_by_fourcc(pcdev->user_formats,
pix->pixelformat);
v4l2_fill_mbus_format(&format.format, pix, xlate->code);
ret = sensor_call(pcdev, pad, set_fmt, NULL, &format);
if (ret < 0) {
dev_warn(pcdev_to_dev(pcdev),
"Failed to configure for format %x\n",
pix->pixelformat);
} else if (pxa_camera_check_frame(pix->width, pix->height)) {
dev_warn(pcdev_to_dev(pcdev),
"Camera driver produced an unsupported frame %dx%d\n",
pix->width, pix->height);
return -EINVAL;
}
pcdev->current_fmt = xlate;
pcdev->current_pix = *pix;
ret = pxa_camera_set_bus_param(pcdev);
return ret;
}
static int pxac_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->bus_info, "platform:pxa-camera", sizeof(cap->bus_info));
strscpy(cap->driver, PXA_CAM_DRV_NAME, sizeof(cap->driver));
strscpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
return 0;
}
static int pxac_vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index > 0)
return -EINVAL;
i->type = V4L2_INPUT_TYPE_CAMERA;
strscpy(i->name, "Camera", sizeof(i->name));
return 0;
}
static int pxac_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int pxac_vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
if (i > 0)
return -EINVAL;
return 0;
}
static int pxac_sensor_set_power(struct pxa_camera_dev *pcdev, int on)
{
int ret;
ret = sensor_call(pcdev, core, s_power, on);
if (ret == -ENOIOCTLCMD)
ret = 0;
if (ret) {
dev_warn(pcdev_to_dev(pcdev),
"Failed to put subdevice in %s mode: %d\n",
on ? "normal operation" : "power saving", ret);
}
return ret;
}
static int pxac_fops_camera_open(struct file *filp)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
int ret;
mutex_lock(&pcdev->mlock);
ret = v4l2_fh_open(filp);
if (ret < 0)
goto out;
if (!v4l2_fh_is_singular_file(filp))
goto out;
ret = pxac_sensor_set_power(pcdev, 1);
if (ret)
v4l2_fh_release(filp);
out:
mutex_unlock(&pcdev->mlock);
return ret;
}
static int pxac_fops_camera_release(struct file *filp)
{
struct pxa_camera_dev *pcdev = video_drvdata(filp);
int ret;
bool fh_singular;
mutex_lock(&pcdev->mlock);
fh_singular = v4l2_fh_is_singular_file(filp);
ret = _vb2_fop_release(filp, NULL);
if (fh_singular)
ret = pxac_sensor_set_power(pcdev, 0);
mutex_unlock(&pcdev->mlock);
return ret;
}
static const struct v4l2_file_operations pxa_camera_fops = {
.owner = THIS_MODULE,
.open = pxac_fops_camera_open,
.release = pxac_fops_camera_release,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops = {
.vidioc_querycap = pxac_vidioc_querycap,
.vidioc_enum_input = pxac_vidioc_enum_input,
.vidioc_g_input = pxac_vidioc_g_input,
.vidioc_s_input = pxac_vidioc_s_input,
.vidioc_enum_fmt_vid_cap = pxac_vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = pxac_vidioc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = pxac_vidioc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = pxac_vidioc_try_fmt_vid_cap,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = pxac_vidioc_g_register,
.vidioc_s_register = pxac_vidioc_s_register,
#endif
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct video_device pxa_camera_videodev_template = {
.name = "pxa-camera",
.minor = -1,
.fops = &pxa_camera_fops,
.ioctl_ops = &pxa_camera_ioctl_ops,
.release = video_device_release_empty,
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING,
};
static int pxa_camera_sensor_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_connection *asd)
{
int err;
struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
struct video_device *vdev = &pcdev->vdev;
struct v4l2_pix_format *pix = &pcdev->current_pix;
struct v4l2_subdev_format format = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
struct v4l2_mbus_framefmt *mf = &format.format;
dev_info(pcdev_to_dev(pcdev), "%s(): trying to bind a device\n",
__func__);
mutex_lock(&pcdev->mlock);
*vdev = pxa_camera_videodev_template;
vdev->v4l2_dev = v4l2_dev;
vdev->lock = &pcdev->mlock;
pcdev->sensor = subdev;
pcdev->vdev.queue = &pcdev->vb2_vq;
pcdev->vdev.v4l2_dev = &pcdev->v4l2_dev;
pcdev->vdev.ctrl_handler = subdev->ctrl_handler;
video_set_drvdata(&pcdev->vdev, pcdev);
err = pxa_camera_build_formats(pcdev);
if (err) {
dev_err(pcdev_to_dev(pcdev), "building formats failed: %d\n",
err);
goto out;
}
pcdev->current_fmt = pcdev->user_formats;
pix->field = V4L2_FIELD_NONE;
pix->width = DEFAULT_WIDTH;
pix->height = DEFAULT_HEIGHT;
pix->bytesperline =
pxa_mbus_bytes_per_line(pix->width,
pcdev->current_fmt->host_fmt);
pix->sizeimage =
pxa_mbus_image_size(pcdev->current_fmt->host_fmt,
pix->bytesperline, pix->height);
pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
v4l2_fill_mbus_format(mf, pix, pcdev->current_fmt->code);
err = pxac_sensor_set_power(pcdev, 1);
if (err)
goto out;
err = sensor_call(pcdev, pad, set_fmt, NULL, &format);
if (err)
goto out_sensor_poweroff;
v4l2_fill_pix_format(pix, mf);
pr_info("%s(): colorspace=0x%x pixfmt=0x%x\n",
__func__, pix->colorspace, pix->pixelformat);
err = pxa_camera_init_videobuf2(pcdev);
if (err)
goto out_sensor_poweroff;
err = video_register_device(&pcdev->vdev, VFL_TYPE_VIDEO, -1);
if (err) {
v4l2_err(v4l2_dev, "register video device failed: %d\n", err);
pcdev->sensor = NULL;
} else {
dev_info(pcdev_to_dev(pcdev),
"PXA Camera driver attached to camera %s\n",
subdev->name);
}
out_sensor_poweroff:
err = pxac_sensor_set_power(pcdev, 0);
out:
mutex_unlock(&pcdev->mlock);
return err;
}
static void pxa_camera_sensor_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_connection *asd)
{
struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(notifier->v4l2_dev);
mutex_lock(&pcdev->mlock);
dev_info(pcdev_to_dev(pcdev),
"PXA Camera driver detached from camera %s\n",
subdev->name);
/* disable capture, disable interrupts */
__raw_writel(0x3ff, pcdev->base + CICR0);
/* Stop DMA engine */
pxa_dma_stop_channels(pcdev);
pxa_camera_destroy_formats(pcdev);
video_unregister_device(&pcdev->vdev);
pcdev->sensor = NULL;
mutex_unlock(&pcdev->mlock);
}
static const struct v4l2_async_notifier_operations pxa_camera_sensor_ops = {
.bound = pxa_camera_sensor_bound,
.unbind = pxa_camera_sensor_unbind,
};
/*
* Driver probe, remove, suspend and resume operations
*/
static int pxa_camera_suspend(struct device *dev)
{
struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
int i = 0, ret = 0;
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0);
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1);
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2);
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);
if (pcdev->sensor)
ret = pxac_sensor_set_power(pcdev, 0);
return ret;
}
static int pxa_camera_resume(struct device *dev)
{
struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
int i = 0, ret = 0;
__raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0);
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1);
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2);
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);
if (pcdev->sensor) {
ret = pxac_sensor_set_power(pcdev, 1);
}
/* Restart frame capture if active buffer exists */
if (!ret && pcdev->active)
pxa_camera_start_capture(pcdev);
return ret;
}
static int pxa_camera_pdata_from_dt(struct device *dev,
struct pxa_camera_dev *pcdev)
{
u32 mclk_rate;
struct v4l2_async_connection *asd;
struct device_node *np = dev->of_node;
struct v4l2_fwnode_endpoint ep = { .bus_type = 0 };
int err = of_property_read_u32(np, "clock-frequency",
&mclk_rate);
if (!err) {
pcdev->platform_flags |= PXA_CAMERA_MCLK_EN;
pcdev->mclk = mclk_rate;
}
np = of_graph_get_endpoint_by_regs(np, 0, -1);
if (!np) {
dev_err(dev, "could not find endpoint\n");
return -EINVAL;
}
err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep);
if (err) {
dev_err(dev, "could not parse endpoint\n");
goto out;
}
switch (ep.bus.parallel.bus_width) {
case 4:
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_4;
break;
case 5:
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_5;
break;
case 8:
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_8;
break;
case 9:
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_9;
break;
case 10:
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
break;
default:
break;
}
if (ep.bus.parallel.flags & V4L2_MBUS_MASTER)
pcdev->platform_flags |= PXA_CAMERA_MASTER;
if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
pcdev->platform_flags |= PXA_CAMERA_HSP;
if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
pcdev->platform_flags |= PXA_CAMERA_VSP;
if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
pcdev->platform_flags |= PXA_CAMERA_PCLK_EN | PXA_CAMERA_PCP;
if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
pcdev->platform_flags |= PXA_CAMERA_PCLK_EN;
asd = v4l2_async_nf_add_fwnode_remote(&pcdev->notifier,
of_fwnode_handle(np),
struct v4l2_async_connection);
if (IS_ERR(asd))
err = PTR_ERR(asd);
out:
of_node_put(np);
return err;
}
static int pxa_camera_probe(struct platform_device *pdev)
{
struct pxa_camera_dev *pcdev;
struct resource *res;
void __iomem *base;
struct dma_slave_config config = {
.src_addr_width = 0,
.src_maxburst = 8,
.direction = DMA_DEV_TO_MEM,
};
int irq;
int err = 0, i;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENODEV;
pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
if (!pcdev) {
dev_err(&pdev->dev, "Could not allocate pcdev\n");
return -ENOMEM;
}
pcdev->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pcdev->clk))
return PTR_ERR(pcdev->clk);
/*
* Request the regions.
*/
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(base))
return PTR_ERR(base);
pcdev->irq = irq;
pcdev->base = base;
err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
if (err)
return err;
v4l2_async_nf_init(&pcdev->notifier, &pcdev->v4l2_dev);
pcdev->res = res;
pcdev->pdata = pdev->dev.platform_data;
if (pcdev->pdata) {
struct v4l2_async_connection *asd;
pcdev->platform_flags = pcdev->pdata->flags;
pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
asd = v4l2_async_nf_add_i2c(&pcdev->notifier,
pcdev->pdata->sensor_i2c_adapter_id,
pcdev->pdata->sensor_i2c_address,
struct v4l2_async_connection);
if (IS_ERR(asd))
err = PTR_ERR(asd);
} else if (pdev->dev.of_node) {
err = pxa_camera_pdata_from_dt(&pdev->dev, pcdev);
} else {
err = -ENODEV;
}
if (err < 0)
goto exit_v4l2_device_unregister;
if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
/*
* Platform hasn't set available data widths. This is bad.
* Warn and use a default.
*/
dev_warn(&pdev->dev, "WARNING! Platform hasn't set available data widths, using default 10 bit\n");
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
}
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
pcdev->width_flags = 1 << 7;
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
pcdev->width_flags |= 1 << 8;
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
pcdev->width_flags |= 1 << 9;
if (!pcdev->mclk) {
dev_warn(&pdev->dev,
"mclk == 0! Please, fix your platform data. Using default 20MHz\n");
pcdev->mclk = 20000000;
}
pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev);
INIT_LIST_HEAD(&pcdev->capture);
spin_lock_init(&pcdev->lock);
mutex_init(&pcdev->mlock);
/* request dma */
pcdev->dma_chans[0] = dma_request_chan(&pdev->dev, "CI_Y");
if (IS_ERR(pcdev->dma_chans[0])) {
dev_err(&pdev->dev, "Can't request DMA for Y\n");
err = PTR_ERR(pcdev->dma_chans[0]);
goto exit_notifier_cleanup;
}
pcdev->dma_chans[1] = dma_request_chan(&pdev->dev, "CI_U");
if (IS_ERR(pcdev->dma_chans[1])) {
dev_err(&pdev->dev, "Can't request DMA for U\n");
err = PTR_ERR(pcdev->dma_chans[1]);
goto exit_free_dma_y;
}
pcdev->dma_chans[2] = dma_request_chan(&pdev->dev, "CI_V");
if (IS_ERR(pcdev->dma_chans[2])) {
dev_err(&pdev->dev, "Can't request DMA for V\n");
err = PTR_ERR(pcdev->dma_chans[2]);
goto exit_free_dma_u;
}
for (i = 0; i < 3; i++) {
config.src_addr = pcdev->res->start + CIBR0 + i * 8;
err = dmaengine_slave_config(pcdev->dma_chans[i], &config);
if (err < 0) {
dev_err(&pdev->dev, "dma slave config failed: %d\n",
err);
goto exit_free_dma;
}
}
INIT_WORK(&pcdev->eof_bh_work, pxa_camera_eof_bh_work);
pxa_camera_activate(pcdev);
platform_set_drvdata(pdev, pcdev);
err = pxa_camera_init_videobuf2(pcdev);
if (err)
goto exit_deactivate;
/* request irq */
err = devm_request_irq(&pdev->dev, pcdev->irq, pxa_camera_irq, 0,
PXA_CAM_DRV_NAME, pcdev);
if (err) {
dev_err(&pdev->dev, "Camera interrupt register failed\n");
goto exit_deactivate;
}
pcdev->notifier.ops = &pxa_camera_sensor_ops;
err = v4l2_async_nf_register(&pcdev->notifier);
if (err)
goto exit_deactivate;
return 0;
exit_deactivate:
pxa_camera_deactivate(pcdev);
cancel_work_sync(&pcdev->eof_bh_work);
exit_free_dma:
dma_release_channel(pcdev->dma_chans[2]);
exit_free_dma_u:
dma_release_channel(pcdev->dma_chans[1]);
exit_free_dma_y:
dma_release_channel(pcdev->dma_chans[0]);
exit_notifier_cleanup:
v4l2_async_nf_cleanup(&pcdev->notifier);
exit_v4l2_device_unregister:
v4l2_device_unregister(&pcdev->v4l2_dev);
return err;
}
static void pxa_camera_remove(struct platform_device *pdev)
{
struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
pxa_camera_deactivate(pcdev);
cancel_work_sync(&pcdev->eof_bh_work);
dma_release_channel(pcdev->dma_chans[0]);
dma_release_channel(pcdev->dma_chans[1]);
dma_release_channel(pcdev->dma_chans[2]);
v4l2_async_nf_unregister(&pcdev->notifier);
v4l2_async_nf_cleanup(&pcdev->notifier);
v4l2_device_unregister(&pcdev->v4l2_dev);
dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
}
static const struct dev_pm_ops pxa_camera_pm = {
.suspend = pxa_camera_suspend,
.resume = pxa_camera_resume,
};
static const struct of_device_id pxa_camera_of_match[] = {
{ .compatible = "marvell,pxa270-qci", },
{},
};
MODULE_DEVICE_TABLE(of, pxa_camera_of_match);
static struct platform_driver pxa_camera_driver = {
.driver = {
.name = PXA_CAM_DRV_NAME,
.pm = &pxa_camera_pm,
.of_match_table = pxa_camera_of_match,
},
.probe = pxa_camera_probe,
.remove_new = pxa_camera_remove,
};
module_platform_driver(pxa_camera_driver);
MODULE_DESCRIPTION("PXA27x Camera Driver");
MODULE_AUTHOR("Guennadi Liakhovetski <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_VERSION(PXA_CAM_VERSION);
MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
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