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linux-next/drivers/media/platform/pxa_camera.c
Robert Jarzmik f727b6cda4 media: pxa_camera: remove the dmaengine compat need 
As the pxa architecture switched towards the dmaengine slave map, the
old compatibility mechanism to acquire the dma requestor line number and
priority are not needed anymore.

This patch simplifies the dma resource acquisition, using the more
generic function dma_request_slave_channel().

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-06-18 21:29:40 +02:00

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/*
* V4L2 Driver for PXA camera host
*
* Copyright (C) 2006, Sascha Hauer, Pengutronix
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
* Copyright (C) 2016, Robert Jarzmik <robert.jarzmik@free.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#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-clk.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>
#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 (1 << 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 (1 << 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));
}
static unsigned int pxa_mbus_config_compatible(const struct v4l2_mbus_config *cfg,
unsigned int flags)
{
unsigned long common_flags;
bool hsync = true, vsync = true, pclk, data, mode;
bool mipi_lanes, mipi_clock;
common_flags = cfg->flags & flags;
switch (cfg->type) {
case V4L2_MBUS_PARALLEL:
hsync = common_flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH |
V4L2_MBUS_HSYNC_ACTIVE_LOW);
vsync = common_flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH |
V4L2_MBUS_VSYNC_ACTIVE_LOW);
/* fall through */
case V4L2_MBUS_BT656:
pclk = common_flags & (V4L2_MBUS_PCLK_SAMPLE_RISING |
V4L2_MBUS_PCLK_SAMPLE_FALLING);
data = common_flags & (V4L2_MBUS_DATA_ACTIVE_HIGH |
V4L2_MBUS_DATA_ACTIVE_LOW);
mode = common_flags & (V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE);
return (!hsync || !vsync || !pclk || !data || !mode) ?
0 : common_flags;
case V4L2_MBUS_CSI2:
mipi_lanes = common_flags & V4L2_MBUS_CSI2_LANES;
mipi_clock = common_flags & (V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK);
return (!mipi_lanes || !mipi_clock) ? 0 : common_flags;
default:
WARN_ON(1);
return -EINVAL;
}
return 0;
}
/**
* 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;
struct v4l2_async_subdev asd;
struct v4l2_async_subdev *asds[1];
/*
* 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;
struct v4l2_clk *mclk_clk;
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 tasklet_struct task_eof;
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_videobuf_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 videobuffer is queued on the pcdev->capture list
*
* Please check the "DMA hot chaining timeslice issue" in
* Documentation/media/v4l-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(unsigned long arg)
{
struct pxa_camera_dev *pcdev = (struct pxa_camera_dev *)arg;
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_videobuf_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);
tasklet_schedule(&pcdev->task_eof);
}
return IRQ_HANDLED;
}
static int test_platform_param(struct pxa_camera_dev *pcdev,
unsigned char buswidth, unsigned long *flags)
{
/*
* Platform specified synchronization and pixel clock polarities are
* only a recommendation and are only used during probing. The PXA270
* quick capture interface supports both.
*/
*flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
V4L2_MBUS_MASTER : V4L2_MBUS_SLAVE) |
V4L2_MBUS_HSYNC_ACTIVE_HIGH |
V4L2_MBUS_HSYNC_ACTIVE_LOW |
V4L2_MBUS_VSYNC_ACTIVE_HIGH |
V4L2_MBUS_VSYNC_ACTIVE_LOW |
V4L2_MBUS_DATA_ACTIVE_HIGH |
V4L2_MBUS_PCLK_SAMPLE_RISING |
V4L2_MBUS_PCLK_SAMPLE_FALLING;
/* If requested data width is supported by the platform, use it */
if ((1 << (buswidth - 1)) & pcdev->width_flags)
return 0;
return -EINVAL;
}
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.
*/
/* fall through */
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/media/v4l-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;
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_videobuf_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)
{
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
u32 pixfmt = pcdev->current_fmt->host_fmt->fourcc;
unsigned long bus_flags, common_flags;
int ret;
ret = test_platform_param(pcdev,
pcdev->current_fmt->host_fmt->bits_per_sample,
&bus_flags);
if (ret < 0)
return ret;
ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
if (!ret) {
common_flags = pxa_mbus_config_compatible(&cfg,
bus_flags);
if (!common_flags) {
dev_warn(pcdev_to_dev(pcdev),
"Flags incompatible: camera 0x%x, host 0x%lx\n",
cfg.flags, bus_flags);
return -EINVAL;
}
} else if (ret != -ENOIOCTLCMD) {
return ret;
} else {
common_flags = bus_flags;
}
pcdev->channels = 1;
/* Make choises, based on platform preferences */
if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
if (pcdev->platform_flags & PXA_CAMERA_HSP)
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
else
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
}
if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
if (pcdev->platform_flags & PXA_CAMERA_VSP)
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
else
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
}
if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
(common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
if (pcdev->platform_flags & PXA_CAMERA_PCP)
common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
else
common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
}
cfg.flags = common_flags;
ret = sensor_call(pcdev, video, s_mbus_config, &cfg);
if (ret < 0 && ret != -ENOIOCTLCMD) {
dev_dbg(pcdev_to_dev(pcdev),
"camera s_mbus_config(0x%lx) returned %d\n",
common_flags, ret);
return ret;
}
pxa_camera_setup_cicr(pcdev, common_flags, pixfmt);
return 0;
}
static int pxa_camera_try_bus_param(struct pxa_camera_dev *pcdev,
unsigned char buswidth)
{
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
unsigned long bus_flags, common_flags;
int ret = test_platform_param(pcdev, buswidth, &bus_flags);
if (ret < 0)
return ret;
ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
if (!ret) {
common_flags = pxa_mbus_config_compatible(&cfg,
bus_flags);
if (!common_flags) {
dev_warn(pcdev_to_dev(pcdev),
"Flags incompatible: camera 0x%x, host 0x%lx\n",
cfg.flags, bus_flags);
return -EINVAL;
}
} else if (ret == -ENOIOCTLCMD) {
ret = 0;
}
return ret;
}
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;
}
/* This also checks support for the requested bits-per-sample */
ret = pxa_camera_try_bus_param(pcdev, fmt->bits_per_sample);
if (ret < 0)
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);
}
/* fall through */
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_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_cfg, &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)
{
strlcpy(cap->bus_info, "platform:pxa-camera", sizeof(cap->bus_info));
strlcpy(cap->driver, PXA_CAM_DRV_NAME, sizeof(cap->driver));
strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
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;
strlcpy(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 v4l2_clk_ops pxa_camera_mclk_ops = {
};
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_subdev *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_GRABBER, -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_subdev *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);
if (pcdev->mclk_clk) {
v4l2_clk_unregister(pcdev->mclk_clk);
pcdev->mclk_clk = NULL;
}
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,
struct v4l2_async_subdev *asd)
{
u32 mclk_rate;
struct device_node *remote, *np = dev->of_node;
struct v4l2_fwnode_endpoint ep;
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_next_endpoint(np, NULL);
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->match_type = V4L2_ASYNC_MATCH_FWNODE;
remote = of_graph_get_remote_port(np);
if (remote) {
asd->match.fwnode = of_fwnode_handle(remote);
of_node_put(remote);
} else {
dev_notice(dev, "no remote for %pOF\n", np);
}
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,
};
char clk_name[V4L2_CLK_NAME_SIZE];
int irq;
int err = 0, i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!res || 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);
pcdev->res = res;
pcdev->pdata = pdev->dev.platform_data;
if (&pdev->dev.of_node && !pcdev->pdata) {
err = pxa_camera_pdata_from_dt(&pdev->dev, pcdev, &pcdev->asd);
} else {
pcdev->platform_flags = pcdev->pdata->flags;
pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
pcdev->asd.match.i2c.adapter_id =
pcdev->pdata->sensor_i2c_adapter_id;
pcdev->asd.match.i2c.address = pcdev->pdata->sensor_i2c_address;
}
if (err < 0)
return err;
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 the regions.
*/
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
pcdev->irq = irq;
pcdev->base = base;
/* request dma */
pcdev->dma_chans[0] = dma_request_slave_channel(&pdev->dev, "CI_Y");
if (!pcdev->dma_chans[0]) {
dev_err(&pdev->dev, "Can't request DMA for Y\n");
return -ENODEV;
}
pcdev->dma_chans[1] = dma_request_slave_channel(&pdev->dev, "CI_U");
if (!pcdev->dma_chans[1]) {
dev_err(&pdev->dev, "Can't request DMA for Y\n");
err = -ENODEV;
goto exit_free_dma_y;
}
pcdev->dma_chans[2] = dma_request_slave_channel(&pdev->dev, "CI_V");
if (!pcdev->dma_chans[2]) {
dev_err(&pdev->dev, "Can't request DMA for V\n");
err = -ENODEV;
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;
}
}
/* 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_free_dma;
}
tasklet_init(&pcdev->task_eof, pxa_camera_eof, (unsigned long)pcdev);
pxa_camera_activate(pcdev);
dev_set_drvdata(&pdev->dev, pcdev);
err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
if (err)
goto exit_deactivate;
pcdev->asds[0] = &pcdev->asd;
pcdev->notifier.subdevs = pcdev->asds;
pcdev->notifier.num_subdevs = 1;
pcdev->notifier.ops = &pxa_camera_sensor_ops;
if (!of_have_populated_dt())
pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
err = pxa_camera_init_videobuf2(pcdev);
if (err)
goto exit_free_v4l2dev;
if (pcdev->mclk) {
v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
pcdev->asd.match.i2c.adapter_id,
pcdev->asd.match.i2c.address);
pcdev->mclk_clk = v4l2_clk_register(&pxa_camera_mclk_ops,
clk_name, NULL);
if (IS_ERR(pcdev->mclk_clk)) {
err = PTR_ERR(pcdev->mclk_clk);
goto exit_free_v4l2dev;
}
}
err = v4l2_async_notifier_register(&pcdev->v4l2_dev, &pcdev->notifier);
if (err)
goto exit_free_clk;
return 0;
exit_free_clk:
v4l2_clk_unregister(pcdev->mclk_clk);
exit_free_v4l2dev:
v4l2_device_unregister(&pcdev->v4l2_dev);
exit_deactivate:
pxa_camera_deactivate(pcdev);
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]);
return err;
}
static int pxa_camera_remove(struct platform_device *pdev)
{
struct pxa_camera_dev *pcdev = dev_get_drvdata(&pdev->dev);
pxa_camera_deactivate(pcdev);
dma_release_channel(pcdev->dma_chans[0]);
dma_release_channel(pcdev->dma_chans[1]);
dma_release_channel(pcdev->dma_chans[2]);
v4l2_async_notifier_unregister(&pcdev->notifier);
if (pcdev->mclk_clk) {
v4l2_clk_unregister(pcdev->mclk_clk);
pcdev->mclk_clk = NULL;
}
v4l2_device_unregister(&pcdev->v4l2_dev);
dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
return 0;
}
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 = of_match_ptr(pxa_camera_of_match),
},
.probe = pxa_camera_probe,
.remove = pxa_camera_remove,
};
module_platform_driver(pxa_camera_driver);
MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
MODULE_LICENSE("GPL");
MODULE_VERSION(PXA_CAM_VERSION);
MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
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