Hi Felipe,
Thanks for the patch. Please find some of the comments below.
On Tue, Jul 15, 2014 at 6:56 PM, Felipe Balbi <balbi@xxxxxx> wrote:
> From: Benoit Parrot <bparrot@xxxxxx>
>
> Add Video Processing Front End (VPFE) driver for AM43XX family of devices
> Driver supports the following:
> - Dual instances (AM43XX has two hardware instance)
> - V4L2 API using MMAP buffer access based on videobuf2 api
> - Asynchronous sensor/decoder sub device registration
>
> [detheridge@xxxxxx - fixed up for v3.14]
> [balbi@xxxxxx - updated for v3.16-rc5
> - fixed v4l2-compliance
> - fixed a kernel crash
> - fixed checkpatch.pl ]
>
> Signed-off-by: Benoit Parrot <bparrot@xxxxxx>
> Signed-off-by: Darren Etheridge <detheridge@xxxxxx>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> drivers/media/platform/Kconfig | 1 +
> drivers/media/platform/Makefile | 2 +
> drivers/media/platform/ti-vpfe/Kconfig | 12 +
> drivers/media/platform/ti-vpfe/Makefile | 2 +
> drivers/media/platform/ti-vpfe/am437x_isif.c | 1053 +++++++++
> drivers/media/platform/ti-vpfe/am437x_isif.h | 355 +++
> drivers/media/platform/ti-vpfe/am437x_isif_regs.h | 144 ++
> drivers/media/platform/ti-vpfe/vpfe_capture.c | 2478 +++++++++++++++++++++
> drivers/media/platform/ti-vpfe/vpfe_capture.h | 263 +++
> 9 files changed, 4310 insertions(+)
> create mode 100644 drivers/media/platform/ti-vpfe/Kconfig
> create mode 100644 drivers/media/platform/ti-vpfe/Makefile
> create mode 100644 drivers/media/platform/ti-vpfe/am437x_isif.c
> create mode 100644 drivers/media/platform/ti-vpfe/am437x_isif.h
> create mode 100644 drivers/media/platform/ti-vpfe/am437x_isif_regs.h
> create mode 100644 drivers/media/platform/ti-vpfe/vpfe_capture.c
> create mode 100644 drivers/media/platform/ti-vpfe/vpfe_capture.h
>
The ti-vpfe folder makes it kind of generic (drivers under
media/platform are platform specific.
for example the Davinci too has vpfe.
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index 8108c69..c119f0a 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -120,6 +120,7 @@ config VIDEO_S3C_CAMIF
> source "drivers/media/platform/soc_camera/Kconfig"
> source "drivers/media/platform/exynos4-is/Kconfig"
> source "drivers/media/platform/s5p-tv/Kconfig"
> +source "drivers/media/platform/ti-vpfe/Kconfig"
>
> endif # V4L_PLATFORM_DRIVERS
>
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index e5269da..bd6b321 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -52,3 +52,5 @@ obj-y += davinci/
> obj-$(CONFIG_ARCH_OMAP) += omap/
>
> ccflags-y += -I$(srctree)/drivers/media/i2c
> +
> +obj-$(CONFIG_VIDEO_AM437X_VPFE) += ti-vpfe/
> diff --git a/drivers/media/platform/ti-vpfe/Kconfig b/drivers/media/platform/ti-vpfe/Kconfig
> new file mode 100644
> index 0000000..6758bb7
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/Kconfig
> @@ -0,0 +1,12 @@
> +config VIDEO_AM437X_VPFE
> + tristate "TI AM437x VPFE video capture driver"
> + depends on VIDEO_V4L2 && ARCH_OMAP3
> + select MEDIA_CONTROLLER
> + select VIDEO_V4L2_SUBDEV_API
> + select VIDEOBUF2_DMA_CONTIG
> + help
> + Support for AM437x Video Processing Front End based Video
> + Capture Driver.
> +
> + To compile this driver as a module, choose M here. The module
> + will be called ti_vpfe.
> diff --git a/drivers/media/platform/ti-vpfe/Makefile b/drivers/media/platform/ti-vpfe/Makefile
> new file mode 100644
> index 0000000..0155cd8
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/Makefile
> @@ -0,0 +1,2 @@
> +ti-vpfe-y := am437x_isif.o vpfe_capture.o
> +obj-$(CONFIG_VIDEO_AM437X_VPFE) += ti-vpfe.o
> diff --git a/drivers/media/platform/ti-vpfe/am437x_isif.c b/drivers/media/platform/ti-vpfe/am437x_isif.c
> new file mode 100644
> index 0000000..1f4262b
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/am437x_isif.c
> @@ -0,0 +1,1053 @@
> +/*
> + * TI AM437x Image Sensor Interface
> + *
> + * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
> + *
> + * Benoit Parrot <bparrot@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/uaccess.h>
> +#include <linux/videodev2.h>
> +#include <linux/gfp.h>
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/module.h>
> +#include <linux/clk-private.h>
> +#include <linux/pm_runtime.h>
> +#include "vpfe_capture.h"
> +
> +/* Print Four-character-code (FOURCC) */
> +static char *print_fourcc(u32 fmt)
> +{
> + static char code[5];
> +
> + code[0] = (unsigned char)(fmt & 0xff);
> + code[1] = (unsigned char)((fmt>>8) & 0xff);
> + code[2] = (unsigned char)((fmt>>16) & 0xff);
> + code[3] = (unsigned char)((fmt>>24) & 0xff);
> + code[4] = '\0';
> +
> + return code;
> +}
> +
> +/* Raw Bayer formats */
> +static u32 isif_raw_bayer_pix_formats[] = {
> + V4L2_PIX_FMT_SBGGR8,
> + V4L2_PIX_FMT_SBGGR16,
> + V4L2_PIX_FMT_UYVY,
> + V4L2_PIX_FMT_YUYV
> +};
> +
> +/* Raw YUV formats */
> +static u32 isif_raw_yuv_pix_formats[] = {
> + V4L2_PIX_FMT_UYVY,
> + V4L2_PIX_FMT_YUYV
> +};
> +
> +static inline u32 isif_read(struct vpfe_isif_device *isif,
> + u32 offset)
> +{
> + return readl(isif->isif_cfg.base_addr + offset);
> +}
> +
> +static inline void isif_write(struct vpfe_isif_device *isif,
> + u32 val, u32 offset)
> +{
> + writel(val, isif->isif_cfg.base_addr + offset);
> +}
> +
> +static void isif_enable(struct vpfe_isif_device *isif, int flag)
> +{
> + unsigned int pcr = 0;
> +
> + pcr = isif_read(isif, ISIF_PCR);
> +
> + if (flag) { /* Enable */
> + pcr = 1;
> + } else { /* Disable */
> + pcr = 0;
> + }
> +
> + dev_dbg(isif->isif_cfg.dev,
> + "isif_enable(%d) pcr:%x\n", flag, pcr);
> + isif_write(isif, pcr, ISIF_PCR);
> +}
> +static void isif_module_enable(struct vpfe_isif_device *isif, int flag)
> +{
> + unsigned int cfg = 0;
> +
> + cfg = isif_read(isif, ISIF_VPFE_CONFIG);
> +
> + if (flag) { /* Enable */
> + cfg = (ISIF_VPFE_CONFIG_VPFE_EN_ENABLE<<
> + ISIF_VPFE_CONFIG_VPFE_EN_SHIFT);
> + } else { /* Disable */
> + cfg &= ~(ISIF_VPFE_CONFIG_VPFE_EN_ENABLE<<
> + ISIF_VPFE_CONFIG_VPFE_EN_SHIFT);
> + }
> +
> + dev_dbg(isif->isif_cfg.dev,
> + "isif_module_enable(%d) cfg:%x\n", flag, cfg);
> + isif_write(isif, cfg, ISIF_VPFE_CONFIG);
> +}
> +
> +/*
> + * isif_setwin()
> + * This function will configure the window size
> + * to be capture in ISIF reg
> + */
> +static void isif_setwin(struct vpfe_isif_device *isif,
> + struct v4l2_rect *image_win, enum isif_frmfmt frm_fmt, int bpp)
> +{
> + int horz_start, horz_nr_pixels;
> + int vert_start, vert_nr_lines;
> + int val = 0, mid_img = 0;
> +
> + dev_dbg(isif->isif_cfg.dev, "isif_setwin: %dx%d (WxH)\n",
> + image_win->width, image_win->height);
> + dev_dbg(isif->isif_cfg.dev, "isif_setwin: top %d left %d\n",
> + image_win->top, image_win->left);
> + /*
> + * ppc - per pixel count. indicates how many pixels per cell
> + * output to SDRAM. example, for ycbcr, it is one y and one c, so 2.
> + * raw capture this is 1
> + */
> + horz_start = image_win->left * bpp;
> + horz_nr_pixels = (image_win->width * bpp) - 1;
> + isif_write(isif,
> + (horz_start << ISIF_HORZ_INFO_SPH_SHIFT) | horz_nr_pixels,
> + ISIF_HORZ_INFO);
> +
> + vert_start = image_win->top;
> +
> + if (frm_fmt == ISIF_FRMFMT_INTERLACED) {
> + vert_nr_lines = (image_win->height >> 1) - 1;
> + vert_start >>= 1;
> + /* Since first line doesn't have any data */
> + vert_start += 1;
> + /* configure VDINT0 */
> + val = (vert_start << ISIF_VDINT_VDINT0_SHIFT);
> + isif_write(isif, val, ISIF_VDINT);
> +
> + } else {
> + /* Since first line doesn't have any data */
> + vert_start += 1;
> + vert_nr_lines = image_win->height - 1;
> + /*
> + * configure VDINT0 and VDINT1. VDINT1 will be at half
> + * of image height
> + */
> + mid_img = vert_start + (image_win->height / 2);
> + val = (vert_start << ISIF_VDINT_VDINT0_SHIFT) |
> + (mid_img & ISIF_VDINT_VDINT1_MASK);
> + isif_write(isif, val, ISIF_VDINT);
> + }
> + isif_write(isif,
> + (vert_start << ISIF_VERT_START_SLV0_SHIFT) | vert_start,
> + ISIF_VERT_START);
> + isif_write(isif, vert_nr_lines, ISIF_VERT_LINES);
> + dev_dbg(isif->isif_cfg.dev, "End of isif_setwin...\n");
> +}
> +
> +static void isif_readregs(struct vpfe_isif_device *isif)
> +{
> + dev_dbg(isif->isif_cfg.dev, "ALAW: 0x%x\n",
> + isif_read(isif, ISIF_ALAW));
> + dev_dbg(isif->isif_cfg.dev, "CLAMP: 0x%x\n",
> + isif_read(isif, ISIF_CLAMP));
> + dev_dbg(isif->isif_cfg.dev, "DCSUB: 0x%x\n",
> + isif_read(isif, ISIF_DCSUB));
> + dev_dbg(isif->isif_cfg.dev, "BLKCMP: 0x%x\n",
> + isif_read(isif, ISIF_BLKCMP));
> + dev_dbg(isif->isif_cfg.dev, "COLPTN: 0x%x\n",
> + isif_read(isif, ISIF_COLPTN));
> + dev_dbg(isif->isif_cfg.dev, "HSIZE_OFF: 0x%x\n",
> + isif_read(isif, ISIF_HSIZE_OFF));
> + dev_dbg(isif->isif_cfg.dev, "SDOFST: 0x%x\n",
> + isif_read(isif, ISIF_SDOFST));
> + dev_dbg(isif->isif_cfg.dev, "SYN_MODE: 0x%x\n",
> + isif_read(isif, ISIF_SYN_MODE));
> + dev_dbg(isif->isif_cfg.dev, "HORZ_INFO: 0x%x\n",
> + isif_read(isif, ISIF_HORZ_INFO));
> + dev_dbg(isif->isif_cfg.dev, "VERT_START: 0x%x\n",
> + isif_read(isif, ISIF_VERT_START));
> + dev_dbg(isif->isif_cfg.dev, "VERT_LINES: 0x%x\n",
> + isif_read(isif, ISIF_VERT_LINES));
> +}
> +
> +static int validate_isif_param(struct vpfe_isif_device *isif,
> + struct isif_config_params_raw *ccdcparam)
> +{
> + if (ccdcparam->alaw.enable) {
> + u8 max_gamma =
> + isif_gamma_width_max_bit(ccdcparam->alaw.gamma_wd);
> + u8 max_data =
> + isif_data_size_max_bit(ccdcparam->data_sz);
> +
> + if ((ccdcparam->alaw.gamma_wd > ISIF_GAMMA_BITS_09_0) ||
> + (ccdcparam->alaw.gamma_wd < ISIF_GAMMA_BITS_15_6) ||
> + (max_gamma > max_data)) {
> + dev_dbg(isif->isif_cfg.dev, "\nInvalid data line select");
> + return -1;
> + }
> + }
> + return 0;
> +}
> +
> +static int isif_update_raw_params(struct vpfe_isif_device *isif,
> + struct isif_config_params_raw *raw_params)
> +{
> + struct isif_config_params_raw *config_params =
> + &isif->isif_cfg.bayer.config_params;
> +
> + memcpy(config_params, raw_params, sizeof(*raw_params));
> +
> + return 0;
> +}
> +
> +/*
> + * isif_restore_defaults()
> + * This function will write defaults to all ISIF registers
> + */
> +static void isif_restore_defaults(struct vpfe_isif_device *isif)
> +{
> + int i;
> +
> + /* disable ISIF */
> + isif_enable(isif, 0);
> + /* set all registers to default value */
> + for (i = 4; i <= 0x94; i += 4)
> + isif_write(isif, 0, i);
> + isif_write(isif, ISIF_NO_CULLING, ISIF_CULLING);
> + isif_write(isif, ISIF_GAMMA_BITS_11_2, ISIF_ALAW);
> +}
> +
> +static int isif_intr_status(struct vpfe_isif_device *isif);
> +static void isif_clear_intr(struct vpfe_isif_device *isif, int vdint);
> +
> +static int isif_close(struct vpfe_isif_device *isif, struct device *dev)
> +{
> + int dma_cntl, i, pcr;
> +
> + dev_dbg(isif->isif_cfg.dev, "isif_close\n");
> +
> + /* If the ISIF module is still busy wait for it to be done */
> + i = 0;
> + while (i++ < 10) {
> + usleep_range(5000, 6000);
> + pcr = isif_read(isif, ISIF_PCR);
> + if (pcr) {
> + /* make sure it it is disabled */
> + isif_enable(isif, 0);
> + } else {
> + break;
> + }
> + }
> +
> + /* Disable ISIF by resetting all register to default POR values */
> + isif_restore_defaults(isif);
> +
> + /* if DMA_CNTL overflow bit is set. Clear it
> + * It appears to take a while for this to become quiescent ~20ms
> + */
> + i = 0;
> + while (i++ < 10) {
> + dma_cntl = isif_read(isif, ISIF_DMA_CNTL);
> + if (dma_cntl & ISIF_DMA_CNTL_OVERFLOW) {
> + /* Clear the overflow bit */
> + isif_write(isif, dma_cntl, ISIF_DMA_CNTL);
> + usleep_range(5000, 6000);
> + } else {
> + break;
> + }
> + }
> +
> + /* Disabled the module at the CONFIG level */
> + isif_module_enable(isif, 0);
> +
> + pm_runtime_put_sync(dev);
> + return 0;
> +}
> +
> +static int isif_open(struct vpfe_isif_device *isif, struct device *dev)
> +{
> + dev_dbg(isif->isif_cfg.dev, "isif_open\n");
> +
> + pm_runtime_get_sync(dev);
> + isif_module_enable(isif, 1);
> + isif_restore_defaults(isif);
> +
> + return 0;
> +}
> +
> +/* Parameter operations */
> +static int isif_set_params(struct vpfe_isif_device *isif, void __user *params)
> +{
> + struct isif_config_params_raw isif_raw_params;
> + int x;
> +
> + if (isif->isif_cfg.if_type != VPFE_RAW_BAYER)
> + return -EINVAL;
> +
> + x = copy_from_user(&isif_raw_params, params, sizeof(isif_raw_params));
> + if (x) {
> + dev_dbg(isif->isif_cfg.dev, "error copying ccdc params, %d\n", x);
> + return -EFAULT;
> + }
> +
> + if (!validate_isif_param(isif, &isif_raw_params)) {
> + if (!isif_update_raw_params(isif, &isif_raw_params))
> + return 0;
> + }
> + return -EINVAL;
> +}
> +
> +/*
> + * isif_config_ycbcr()
> + * This function will configure ISIF for YCbCr video capture
> + */
> +static void isif_config_ycbcr(struct vpfe_isif_device *isif)
> +{
> + struct isif_params_ycbcr *params = &isif->isif_cfg.ycbcr;
> + u32 syn_mode;
> +
> + dev_dbg(isif->isif_cfg.dev, "isif_config_ycbcr:\n");
> + /*
> + * first restore the ISIF registers to default values
> + * This is important since we assume default values to be set in
> + * a lot of registers that we didn't touch
> + */
> + isif_restore_defaults(isif);
> +
> + /*
> + * configure pixel format, frame format, configure video frame
> + * format, enable output to SDRAM, enable internal timing generator
> + * and 8bit pack mode
> + */
> + syn_mode = (((params->pix_fmt & ISIF_SYN_MODE_INPMOD_MASK) <<
> + ISIF_SYN_MODE_INPMOD_SHIFT) |
> + ((params->frm_fmt & ISIF_SYN_FLDMODE_MASK) <<
> + ISIF_SYN_FLDMODE_SHIFT) | ISIF_VDHDEN_ENABLE |
> + ISIF_WEN_ENABLE | ISIF_DATA_PACK_ENABLE);
> +
> + /* setup BT.656 sync mode */
> + if (params->bt656_enable) {
> + isif_write(isif, ISIF_REC656IF_BT656_EN, ISIF_REC656IF);
> +
> + /*
> + * configure the FID, VD, HD pin polarity,
> + * fld,hd pol positive, vd negative, 8-bit data
> + */
> + syn_mode |= ISIF_SYN_MODE_VD_POL_NEGATIVE;
> + if (isif->isif_cfg.if_type == VPFE_BT656_10BIT)
> + syn_mode |= ISIF_SYN_MODE_10BITS;
> + else
> + syn_mode |= ISIF_SYN_MODE_8BITS;
> + } else {
> + /* y/c external sync mode */
> + syn_mode |= (((params->fid_pol & ISIF_FID_POL_MASK) <<
> + ISIF_FID_POL_SHIFT) |
> + ((params->hd_pol & ISIF_HD_POL_MASK) <<
> + ISIF_HD_POL_SHIFT) |
> + ((params->vd_pol & ISIF_VD_POL_MASK) <<
> + ISIF_VD_POL_SHIFT));
> + }
> + isif_write(isif, syn_mode, ISIF_SYN_MODE);
> +
> + /* configure video window */
> + isif_setwin(isif, ¶ms->win, params->frm_fmt, params->bytesperpixel);
> +
> + /*
> + * configure the order of y cb cr in SDRAM, and disable latch
> + * internal register on vsync
> + */
> + if (isif->isif_cfg.if_type == VPFE_BT656_10BIT)
> + isif_write(isif,
> + (params->pix_order << ISIF_CCDCFG_Y8POS_SHIFT) |
> + ISIF_LATCH_ON_VSYNC_DISABLE |
> + ISIF_CCDCFG_BW656_10BIT,
> + ISIF_CCDCFG);
> + else
> + isif_write(isif,
> + (params->pix_order << ISIF_CCDCFG_Y8POS_SHIFT) |
> + ISIF_LATCH_ON_VSYNC_DISABLE, ISIF_CCDCFG);
> +
> + /*
> + * configure the horizontal line offset. This should be a
> + * on 32 byte boundary. So clear LSB 5 bits
> + */
> + isif_write(isif, params->bytesperline, ISIF_HSIZE_OFF);
> +
> + /* configure the memory line offset */
> + if (params->buf_type == ISIF_BUFTYPE_FLD_INTERLEAVED)
> + /* two fields are interleaved in memory */
> + isif_write(isif, ISIF_SDOFST_FIELD_INTERLEAVED, ISIF_SDOFST);
> +
> + dev_dbg(isif->isif_cfg.dev, "\nEnd of isif_config_ycbcr...\n");
> +}
> +
> +static void isif_config_black_clamp(struct vpfe_isif_device *isif,
> + struct isif_black_clamp *bclamp)
> +{
> + u32 val;
> +
> + if (!bclamp->enable) {
> + /* configure DCSub */
> + val = (bclamp->dc_sub) & ISIF_BLK_DC_SUB_MASK;
> + isif_write(isif, val, ISIF_DCSUB);
> + dev_dbg(isif->isif_cfg.dev,
> + "\nWriting 0x%x to DCSUB...\n", val);
> + isif_write(isif, ISIF_CLAMP_DEFAULT_VAL, ISIF_CLAMP);
> + dev_dbg(isif->isif_cfg.dev,
> + "\nWriting 0x0000 to CLAMP...\n");
> + return;
> + }
> + /*
> + * Configure gain, Start pixel, No of line to be avg,
> + * No of pixel/line to be avg, & Enable the Black clamping
> + */
> + val = ((bclamp->sgain & ISIF_BLK_SGAIN_MASK) |
> + ((bclamp->start_pixel & ISIF_BLK_ST_PXL_MASK) <<
> + ISIF_BLK_ST_PXL_SHIFT) |
> + ((bclamp->sample_ln & ISIF_BLK_SAMPLE_LINE_MASK) <<
> + ISIF_BLK_SAMPLE_LINE_SHIFT) |
> + ((bclamp->sample_pixel & ISIF_BLK_SAMPLE_LN_MASK) <<
> + ISIF_BLK_SAMPLE_LN_SHIFT) | ISIF_BLK_CLAMP_ENABLE);
> + isif_write(isif, val, ISIF_CLAMP);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x%x to CLAMP...\n", val);
> + /* If Black clamping is enable then make dcsub 0 */
> + isif_write(isif, ISIF_DCSUB_DEFAULT_VAL, ISIF_DCSUB);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x00000000 to DCSUB...\n");
> +}
> +
> +static void isif_config_black_compense(struct vpfe_isif_device *isif,
> + struct isif_black_compensation *bcomp)
> +{
> + u32 val;
> +
> + val = ((bcomp->b & ISIF_BLK_COMP_MASK) |
> + ((bcomp->gb & ISIF_BLK_COMP_MASK) <<
> + ISIF_BLK_COMP_GB_COMP_SHIFT) |
> + ((bcomp->gr & ISIF_BLK_COMP_MASK) <<
> + ISIF_BLK_COMP_GR_COMP_SHIFT) |
> + ((bcomp->r & ISIF_BLK_COMP_MASK) <<
> + ISIF_BLK_COMP_R_COMP_SHIFT));
> + isif_write(isif, val, ISIF_BLKCMP);
> +}
> +
> +/*
> + * isif_config_raw()
> + * This function will configure ISIF for Raw capture mode
> + */
> +static void isif_config_raw(struct vpfe_isif_device *isif)
> +{
> + struct isif_params_raw *params = &isif->isif_cfg.bayer;
> + struct isif_config_params_raw *config_params =
> + &isif->isif_cfg.bayer.config_params;
> + unsigned int syn_mode = 0;
> + unsigned int val;
> +
> + dev_dbg(isif->isif_cfg.dev, "isif_config_raw:\n");
> +
> + /* Reset ISIF */
> + isif_restore_defaults(isif);
> +
> + /* Disable latching function registers on VSYNC */
> + isif_write(isif, ISIF_LATCH_ON_VSYNC_DISABLE, ISIF_CCDCFG);
> +
> + /*
> + * Configure the vertical sync polarity(SYN_MODE.VDPOL),
> + * horizontal sync polarity (SYN_MODE.HDPOL), frame id polarity
> + * (SYN_MODE.FLDPOL), frame format(progressive or interlace),
> + * data size(SYNMODE.DATSIZ), &pixel format (Input mode), output
> + * SDRAM, enable internal timing generator
> + */
> + syn_mode =
> + (((params->vd_pol & ISIF_VD_POL_MASK) << ISIF_VD_POL_SHIFT) |
> + ((params->hd_pol & ISIF_HD_POL_MASK) << ISIF_HD_POL_SHIFT) |
> + ((params->fid_pol & ISIF_FID_POL_MASK) << ISIF_FID_POL_SHIFT) |
> + ((params->frm_fmt & ISIF_FRM_FMT_MASK) << ISIF_FRM_FMT_SHIFT) |
> + ((config_params->data_sz & ISIF_DATA_SZ_MASK) <<
> + ISIF_DATA_SZ_SHIFT) |
> + ((params->pix_fmt & ISIF_PIX_FMT_MASK) << ISIF_PIX_FMT_SHIFT) |
> + ISIF_WEN_ENABLE | ISIF_VDHDEN_ENABLE);
> +
> + /* Enable and configure aLaw register if needed */
> + if (config_params->alaw.enable) {
> + val = ((config_params->alaw.gamma_wd &
> + ISIF_ALAW_GAMMA_WD_MASK) | ISIF_ALAW_ENABLE);
> + isif_write(isif, val, ISIF_ALAW);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x%x to ALAW...\n", val);
> + }
> +
> + /* Configure video window */
> + isif_setwin(isif, ¶ms->win, params->frm_fmt, params->bytesperpixel);
> +
> + /* Configure Black Clamp */
> + isif_config_black_clamp(isif, &config_params->blk_clamp);
> +
> + /* Configure Black level compensation */
> + isif_config_black_compense(isif, &config_params->blk_comp);
> +
> + /* If data size is 8 bit then pack the data */
> + if ((config_params->data_sz == ISIF_DATA_8BITS) ||
> + config_params->alaw.enable)
> + syn_mode |= ISIF_DATA_PACK_ENABLE;
> +
> + /* Configure the color pattern according to mt9t001 sensor */
> +/* isif_write(isif, ISIF_COLPTN_VAL, ISIF_COLPTN);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0xBB11BB11 to COLPTN...\n"); */
> +
> + /*
> + * Configure Horizontal offset register. If pack 8 is enabled then
> + * 1 pixel will take 1 byte
> + */
> +
> + isif_write(isif, params->bytesperline, ISIF_HSIZE_OFF);
> + dev_dbg(isif->isif_cfg.dev, "Writing %d (%x) to HSIZE_OFF\n",
> + params->bytesperline, params->bytesperline);
> +
> + /* Set value for SDOFST */
> + if (params->frm_fmt == ISIF_FRMFMT_INTERLACED) {
> + if (params->image_invert_enable) {
> + /* For intelace inverse mode */
> + isif_write(isif, ISIF_INTERLACED_IMAGE_INVERT,
> + ISIF_SDOFST);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x4B6D to SDOFST..\n");
> + }
> +
> + else {
> + /* For intelace non inverse mode */
> + isif_write(isif, ISIF_INTERLACED_NO_IMAGE_INVERT,
> + ISIF_SDOFST);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x0249 to SDOFST..\n");
> + }
> + } else if (params->frm_fmt == ISIF_FRMFMT_PROGRESSIVE) {
> + isif_write(isif, ISIF_PROGRESSIVE_NO_IMAGE_INVERT,
> + ISIF_SDOFST);
> + dev_dbg(isif->isif_cfg.dev, "\nWriting 0x0000 to SDOFST...\n");
> + }
> +
> + isif_write(isif, syn_mode, ISIF_SYN_MODE);
> + dev_dbg(isif->isif_cfg.dev,
> + "\nWriting 0x%x to SYN_MODE...\n", syn_mode);
> +
> + dev_dbg(isif->isif_cfg.dev, "end of isif_config_raw...\n");
> + isif_readregs(isif);
> +}
> +
> +static int isif_configure(struct vpfe_isif_device *isif)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + isif_config_raw(isif);
> + else
> + isif_config_ycbcr(isif);
> + return 0;
> +}
> +
> +static int isif_set_buftype(struct vpfe_isif_device *isif,
> + enum isif_buftype buf_type)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + isif->isif_cfg.bayer.buf_type = buf_type;
> + else
> + isif->isif_cfg.ycbcr.buf_type = buf_type;
> + return 0;
> +}
> +
> +static enum isif_buftype isif_get_buftype(struct vpfe_isif_device *isif)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + return isif->isif_cfg.bayer.buf_type;
> +
> + return isif->isif_cfg.ycbcr.buf_type;
> +}
> +
> +static int isif_enum_pix(struct vpfe_isif_device *isif, u32 *pix, int i)
> +{
> + int ret = -EINVAL;
> +
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER) {
> + if (i < ARRAY_SIZE(isif_raw_bayer_pix_formats)) {
> + *pix = isif_raw_bayer_pix_formats[i];
> + ret = 0;
> + }
> + } else {
> + if (i < ARRAY_SIZE(isif_raw_yuv_pix_formats)) {
> + *pix = isif_raw_yuv_pix_formats[i];
> + ret = 0;
> + }
> + }
> + return ret;
> +}
> +
> +static int isif_set_pixel_format(struct vpfe_isif_device *isif, u32 pixfmt)
> +{
> + dev_dbg(isif->isif_cfg.dev, "isif_set_pixel_format: if_type: %d, pixfmt:%s\n",
> + isif->isif_cfg.if_type, print_fourcc(pixfmt));
> +
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER) {
> + isif->isif_cfg.bayer.pix_fmt = ISIF_PIXFMT_RAW;
> + /*
> + * Need to clear it in case it was left on
> + * after the last capture.
> + */
> + isif->isif_cfg.bayer.config_params.alaw.enable = 0;
> +
> + switch (pixfmt) {
> + case V4L2_PIX_FMT_SBGGR8:
> + isif->isif_cfg.bayer.config_params.alaw.enable = 1;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + case V4L2_PIX_FMT_UYVY:
> + case V4L2_PIX_FMT_YUV420:
> + case V4L2_PIX_FMT_NV12:
> + case V4L2_PIX_FMT_RGB565X:
> + break; /* nothing for now */
> + case V4L2_PIX_FMT_SBGGR16:
> + default:
> + return -EINVAL;
> + }
> + } else {
> + switch (pixfmt) {
> + case V4L2_PIX_FMT_YUYV:
> + isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_YCBYCR;
> + break;
> + case V4L2_PIX_FMT_UYVY:
> + isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_CBYCRY;
> + break;
> + default:
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static u32 isif_get_pixel_format(struct vpfe_isif_device *isif)
> +{
> + u32 pixfmt;
> +
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER) {
> + pixfmt = V4L2_PIX_FMT_YUYV;
> + } else {
> + if (isif->isif_cfg.ycbcr.pix_order == ISIF_PIXORDER_YCBYCR)
> + pixfmt = V4L2_PIX_FMT_YUYV;
> + else
> + pixfmt = V4L2_PIX_FMT_UYVY;
> + }
> +
> + return pixfmt;
> +}
> +
> +static int isif_set_image_window(struct vpfe_isif_device *isif,
> + struct v4l2_rect *win, unsigned int bpp)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER) {
> + isif->isif_cfg.bayer.win = *win;
> + isif->isif_cfg.bayer.bytesperpixel = bpp;
> + isif->isif_cfg.bayer.bytesperline = ALIGN(win->width * bpp, 32);
> + } else {
> + isif->isif_cfg.ycbcr.win = *win;
> + isif->isif_cfg.ycbcr.bytesperpixel = bpp;
> + isif->isif_cfg.ycbcr.bytesperline = ALIGN(win->width * bpp, 32);
> + }
> +
> + return 0;
> +}
> +
> +static void isif_get_image_window(struct vpfe_isif_device *isif,
> + struct v4l2_rect *win)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + *win = isif->isif_cfg.bayer.win;
> + else
> + *win = isif->isif_cfg.ycbcr.win;
> +}
> +
> +static unsigned int isif_get_line_length(struct vpfe_isif_device *isif)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + return isif->isif_cfg.bayer.bytesperline;
> +
> + return isif->isif_cfg.ycbcr.bytesperline;
> +}
> +
> +static int isif_set_frame_format(struct vpfe_isif_device *isif,
> + enum isif_frmfmt frm_fmt)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + isif->isif_cfg.bayer.frm_fmt = frm_fmt;
> + else
> + isif->isif_cfg.ycbcr.frm_fmt = frm_fmt;
> +
> + return 0;
> +}
> +
> +static enum isif_frmfmt isif_get_frame_format(struct vpfe_isif_device *isif)
> +{
> + if (isif->isif_cfg.if_type == VPFE_RAW_BAYER)
> + return isif->isif_cfg.bayer.frm_fmt;
> +
> + return isif->isif_cfg.ycbcr.frm_fmt;
> +}
> +
> +static int isif_getfid(struct vpfe_isif_device *isif)
> +{
> + return (isif_read(isif, ISIF_SYN_MODE) >> 15) & 1;
> +}
> +
> +/* misc operations */
> +static inline void isif_setfbaddr(struct vpfe_isif_device *isif,
> + unsigned long addr)
> +{
> + isif_write(isif, addr & 0xffffffe0, ISIF_SDR_ADDR);
> +}
> +
> +static int isif_set_hw_if_params(struct vpfe_isif_device *isif,
> + struct vpfe_hw_if_param *params)
> +{
> + isif->isif_cfg.if_type = params->if_type;
> +
> + switch (params->if_type) {
> + case VPFE_BT656:
> + case VPFE_YCBCR_SYNC_16:
> + case VPFE_YCBCR_SYNC_8:
> + case VPFE_BT656_10BIT:
> + isif->isif_cfg.ycbcr.vd_pol = params->vdpol;
> + isif->isif_cfg.ycbcr.hd_pol = params->hdpol;
> + break;
> + case VPFE_RAW_BAYER:
> + isif->isif_cfg.bayer.vd_pol = params->vdpol;
> + isif->isif_cfg.bayer.hd_pol = params->hdpol;
> + if (params->bus_width == 10)
> + isif->isif_cfg.bayer.config_params.data_sz =
> + ISIF_DATA_10BITS;
> + else
> + isif->isif_cfg.bayer.config_params.data_sz =
> + ISIF_DATA_8BITS;
> + dev_dbg(isif->isif_cfg.dev, "params.bus_width: %d\n",
> + params->bus_width);
> + dev_dbg(isif->isif_cfg.dev, "config_params.data_sz: %d\n",
> + isif->isif_cfg.bayer.config_params.data_sz);
> + break;
> +
> + default:
> + /* TODO add support for raw bayer here */
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static void isif_save_context(struct vpfe_isif_device *isif)
> +{
> + isif->isif_ctx[ISIF_PCR >> 2] = isif_read(isif, ISIF_PCR);
> + isif->isif_ctx[ISIF_SYN_MODE >> 2] = isif_read(isif, ISIF_SYN_MODE);
> + isif->isif_ctx[ISIF_HD_VD_WID >> 2] = isif_read(isif, ISIF_HD_VD_WID);
> + isif->isif_ctx[ISIF_PIX_LINES >> 2] = isif_read(isif, ISIF_PIX_LINES);
> + isif->isif_ctx[ISIF_HORZ_INFO >> 2] = isif_read(isif, ISIF_HORZ_INFO);
> + isif->isif_ctx[ISIF_VERT_START >> 2] = isif_read(isif, ISIF_VERT_START);
> + isif->isif_ctx[ISIF_VERT_LINES >> 2] = isif_read(isif, ISIF_VERT_LINES);
> + isif->isif_ctx[ISIF_CULLING >> 2] = isif_read(isif, ISIF_CULLING);
> + isif->isif_ctx[ISIF_HSIZE_OFF >> 2] = isif_read(isif, ISIF_HSIZE_OFF);
> + isif->isif_ctx[ISIF_SDOFST >> 2] = isif_read(isif, ISIF_SDOFST);
> + isif->isif_ctx[ISIF_SDR_ADDR >> 2] = isif_read(isif, ISIF_SDR_ADDR);
> + isif->isif_ctx[ISIF_CLAMP >> 2] = isif_read(isif, ISIF_CLAMP);
> + isif->isif_ctx[ISIF_DCSUB >> 2] = isif_read(isif, ISIF_DCSUB);
> + isif->isif_ctx[ISIF_COLPTN >> 2] = isif_read(isif, ISIF_COLPTN);
> + isif->isif_ctx[ISIF_BLKCMP >> 2] = isif_read(isif, ISIF_BLKCMP);
> + isif->isif_ctx[ISIF_VDINT >> 2] = isif_read(isif, ISIF_VDINT);
> + isif->isif_ctx[ISIF_ALAW >> 2] = isif_read(isif, ISIF_ALAW);
> + isif->isif_ctx[ISIF_REC656IF >> 2] = isif_read(isif, ISIF_REC656IF);
> + isif->isif_ctx[ISIF_CCDCFG >> 2] = isif_read(isif, ISIF_CCDCFG);
> +}
> +
> +static void isif_restore_context(struct vpfe_isif_device *isif)
> +{
> + isif_write(isif, isif->isif_ctx[ISIF_SYN_MODE >> 2], ISIF_SYN_MODE);
> + isif_write(isif, isif->isif_ctx[ISIF_HD_VD_WID >> 2], ISIF_HD_VD_WID);
> + isif_write(isif, isif->isif_ctx[ISIF_PIX_LINES >> 2], ISIF_PIX_LINES);
> + isif_write(isif, isif->isif_ctx[ISIF_HORZ_INFO >> 2], ISIF_HORZ_INFO);
> + isif_write(isif, isif->isif_ctx[ISIF_VERT_START >> 2], ISIF_VERT_START);
> + isif_write(isif, isif->isif_ctx[ISIF_VERT_LINES >> 2], ISIF_VERT_LINES);
> + isif_write(isif, isif->isif_ctx[ISIF_CULLING >> 2], ISIF_CULLING);
> + isif_write(isif, isif->isif_ctx[ISIF_HSIZE_OFF >> 2], ISIF_HSIZE_OFF);
> + isif_write(isif, isif->isif_ctx[ISIF_SDOFST >> 2], ISIF_SDOFST);
> + isif_write(isif, isif->isif_ctx[ISIF_SDR_ADDR >> 2], ISIF_SDR_ADDR);
> + isif_write(isif, isif->isif_ctx[ISIF_CLAMP >> 2], ISIF_CLAMP);
> + isif_write(isif, isif->isif_ctx[ISIF_DCSUB >> 2], ISIF_DCSUB);
> + isif_write(isif, isif->isif_ctx[ISIF_COLPTN >> 2], ISIF_COLPTN);
> + isif_write(isif, isif->isif_ctx[ISIF_BLKCMP >> 2], ISIF_BLKCMP);
> + isif_write(isif, isif->isif_ctx[ISIF_VDINT >> 2], ISIF_VDINT);
> + isif_write(isif, isif->isif_ctx[ISIF_ALAW >> 2], ISIF_ALAW);
> + isif_write(isif, isif->isif_ctx[ISIF_REC656IF >> 2], ISIF_REC656IF);
> + isif_write(isif, isif->isif_ctx[ISIF_CCDCFG >> 2], ISIF_CCDCFG);
> + isif_write(isif, isif->isif_ctx[ISIF_PCR >> 2], ISIF_PCR);
> +}
> +
> +static void isif_clear_intr(struct vpfe_isif_device *isif, int vdint)
> +{
> + unsigned int vpfe_int_status;
> +
> + vpfe_int_status = isif_read(isif, ISIF_VPFE_IRQ_STATUS);
> +
> + switch (vdint) {
> + /* VD0 interrrupt */
> + case ISIF_VPFE_VDINT0:
> + vpfe_int_status &= ~ISIF_VPFE_VDINT0;
> + vpfe_int_status |= ISIF_VPFE_VDINT0;
> + break;
> + /* VD1 interrrupt */
> + case ISIF_VPFE_VDINT1:
> + vpfe_int_status &= ~ISIF_VPFE_VDINT1;
> + vpfe_int_status |= ISIF_VPFE_VDINT1;
> + break;
> + /* VD2 interrrupt */
> + case ISIF_VPFE_VDINT2:
> + vpfe_int_status &= ~ISIF_VPFE_VDINT2;
> + vpfe_int_status |= ISIF_VPFE_VDINT2;
> + break;
> + /* Clear all interrrupts */
> + default:
> + vpfe_int_status &= ~(ISIF_VPFE_VDINT0 |
> + ISIF_VPFE_VDINT1 |
> + ISIF_VPFE_VDINT2);
> + vpfe_int_status |= (ISIF_VPFE_VDINT0 |
> + ISIF_VPFE_VDINT1 |
> + ISIF_VPFE_VDINT2);
> + break;
> + }
> + /* Clear specific VDINT from the status register */
> + isif_write(isif, vpfe_int_status, ISIF_VPFE_IRQ_STATUS);
> +
> + vpfe_int_status = isif_read(isif, ISIF_VPFE_IRQ_STATUS);
> +
> + /* Acknowledge that we are done with all interrupts */
> + isif_write(isif, 1, ISIF_VPFE_IRQ_EOI);
> +}
> +
> +static int isif_intr_status(struct vpfe_isif_device *isif)
> +{
> + return isif_read(isif, ISIF_VPFE_IRQ_STATUS);
> +}
> +
> +static int isif_intr_enable(struct vpfe_isif_device *isif, int vdint)
> +{
> + unsigned int intr;
> +
> + dev_vdbg(isif->isif_cfg.dev, "isif_intr_enable(%d) ", vdint);
> + isif_write(isif, vdint, ISIF_VPFE_IRQ_ENABLE_SET);
> + intr = isif_read(isif, ISIF_VPFE_IRQ_ENABLE_SET);
> + dev_vdbg(isif->isif_cfg.dev, "irq_enable_set: %x\n", intr);
> +
> + return 0;
> +}
> +
> +static int isif_intr_disable(struct vpfe_isif_device *isif, int vdint)
> +{
> + unsigned int intr;
> +
> + dev_vdbg(isif->isif_cfg.dev, "isif_intr_disable(%d) ", vdint);
> + isif_write(isif, vdint, ISIF_VPFE_IRQ_ENABLE_CLR);
> + intr = isif_read(isif, ISIF_VPFE_IRQ_ENABLE_CLR);
> + dev_vdbg(isif->isif_cfg.dev, "irq_enable_CLR: %x\n", intr);
> +
> + return 0;
> +}
> +
> +int isif_remove(struct vpfe_isif_device *isif, struct platform_device *pdev)
> +{
> + struct resource *res;
> +
> + dev_vdbg(isif->isif_cfg.dev, "isif_remove\n");
> +
> + pm_runtime_disable(&pdev->dev);
> + iounmap(isif->isif_cfg.base_addr);
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (res)
> + release_mem_region(res->start, resource_size(res));
> +
> + return 0;
> +}
> +
> +int isif_suspend(struct vpfe_isif_device *isif, struct device *dev)
> +{
> + dev_dbg(isif->isif_cfg.dev, "isif_suspend\n");
> +
> + pm_runtime_get_sync(dev);
> + isif_module_enable(isif, 1);
> +
> + /* Save ISIF context */
> + isif_save_context(isif);
> +
> + /* Disable ISIF */
> + isif_enable(isif, 0);
> + isif_module_enable(isif, 0);
> + /* Disable both master and slave clock */
> + pm_runtime_put_sync(dev);
> +
> + return 0;
> +}
> +
> +int isif_resume(struct vpfe_isif_device *isif, struct device *dev)
> +{
> + dev_dbg(isif->isif_cfg.dev, "isif_resume\n");
> +
> + /* Enable both master and slave clock */
> + pm_runtime_get_sync(dev);
> + isif_module_enable(isif, 1);
> + /* Restore ISIF context */
> + isif_restore_context(isif);
> +
> + isif_module_enable(isif, 0);
> + pm_runtime_put_sync(dev);
> +
> + return 0;
> +}
> +
> +/*
> + * vpfe_isif_init() - Initialize V4L2 subdev and media entity
> + * @isif: VPFE isif module
> + * @pdev: Pointer to platform device structure.
> + * Return 0 on success and a negative error code on failure.
> + */
> +
> +static const struct isif_hw_ops isif_ops = {
> + .open = isif_open,
> + .close = isif_close,
> + .enable = isif_enable,
> + .set_hw_if_params = isif_set_hw_if_params,
> + .set_params = isif_set_params,
> + .configure = isif_configure,
> + .set_buftype = isif_set_buftype,
> + .get_buftype = isif_get_buftype,
> + .enum_pix = isif_enum_pix,
> + .set_pixel_format = isif_set_pixel_format,
> + .get_pixel_format = isif_get_pixel_format,
> + .set_frame_format = isif_set_frame_format,
> + .get_frame_format = isif_get_frame_format,
> + .set_image_window = isif_set_image_window,
> + .get_image_window = isif_get_image_window,
> + .get_line_length = isif_get_line_length,
> + .setfbaddr = isif_setfbaddr,
> + .getfid = isif_getfid,
> + .clear_intr = isif_clear_intr,
> + .intr_status = isif_intr_status,
> + .intr_enable = isif_intr_enable,
> + .intr_disable = isif_intr_disable,
> +};
> +
why are these exposed as function pointers ?
> +static void isif_config_defaults(struct vpfe_isif_device *isif)
> +{
> + isif->isif_cfg.if_type = VPFE_RAW_BAYER;
> +
> + isif->isif_cfg.ycbcr.pix_fmt = ISIF_PIXFMT_YCBCR_8BIT;
> + isif->isif_cfg.ycbcr.frm_fmt = ISIF_FRMFMT_INTERLACED;
> + isif->isif_cfg.ycbcr.fid_pol = VPFE_PINPOL_POSITIVE;
> + isif->isif_cfg.ycbcr.vd_pol = VPFE_PINPOL_POSITIVE;
> + isif->isif_cfg.ycbcr.hd_pol = VPFE_PINPOL_POSITIVE;
> + isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_CBYCRY;
> + isif->isif_cfg.ycbcr.buf_type = ISIF_BUFTYPE_FLD_INTERLEAVED;
> + /* ISIF_WIN_PAL */
> + isif->isif_cfg.ycbcr.win.left = 0;
> + isif->isif_cfg.ycbcr.win.top = 0;
> + isif->isif_cfg.ycbcr.win.width = 720;
> + isif->isif_cfg.ycbcr.win.height = 576;
> + isif->isif_cfg.ycbcr.bt656_enable = 1;
> +
> + isif->isif_cfg.bayer.pix_fmt = ISIF_PIXFMT_RAW;
> + isif->isif_cfg.bayer.frm_fmt = ISIF_FRMFMT_PROGRESSIVE;
> + isif->isif_cfg.bayer.fid_pol = VPFE_PINPOL_POSITIVE;
> + isif->isif_cfg.bayer.vd_pol = VPFE_PINPOL_POSITIVE;
> + isif->isif_cfg.bayer.hd_pol = VPFE_PINPOL_POSITIVE;
> + /* ISIF_WIN_SVGA */
> + isif->isif_cfg.bayer.win.left = 0;
> + isif->isif_cfg.bayer.win.top = 0;
> + isif->isif_cfg.bayer.win.width = 800;
> + isif->isif_cfg.bayer.win.height = 600;
> + isif->isif_cfg.bayer.config_params.data_sz = ISIF_DATA_8BITS;
> + isif->isif_cfg.bayer.config_params.alaw.gamma_wd = ISIF_GAMMA_BITS_09_0;
> +}
> +
> +int vpfe_isif_init(struct vpfe_isif_device *isif, struct platform_device *pdev)
> +{
> + struct resource *res;
> + int status = 0;
> +
> + dev_dbg(&pdev->dev, "vpfe_isif_init\n");
> +
> + if (!isif) {
> + dev_err(&pdev->dev, "Failed to init isif device: isif is null\n");
> + return -EFAULT;
> + }
> +
> + strncpy(isif->name, "AM437x ISIF", sizeof(isif->name));
> + isif->owner = THIS_MODULE;
> +
> + dev_dbg(&pdev->dev, "vpfe_isif_init: %s\n", isif->name);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + status = -ENODEV;
> + goto fail_nores;
> + }
> +
> + res = request_mem_region(res->start, resource_size(res), res->name);
> + if (!res) {
> + status = -EBUSY;
> + goto fail_nores;
> + }
> +
> + isif->isif_cfg.base_addr =
> + ioremap_nocache(res->start, resource_size(res));
> + if (!isif->isif_cfg.base_addr) {
> + status = -ENOMEM;
> + goto fail_nomem;
> + }
> +
devm_ioremap_resource() instead ?
> + /* not sure we still need this but keeping it for
> + * 1st pass multi-instance mods
> + */
> + isif->isif_cfg.dev = &pdev->dev;
> +
> + /* Enabling module functional clock */
> + pm_runtime_enable(&pdev->dev);
> +
> + /* for now just enable it here instead of waiting for the open */
> + pm_runtime_get_sync(&pdev->dev);
> +
> + /* Populate the function pointers table */
> + isif->hw_ops = isif_ops;
> + isif_config_defaults(isif);
> + pm_runtime_put_sync(&pdev->dev);
> +
> + return 0;
> +
> +fail_nomem:
> + release_mem_region(res->start, resource_size(res));
> +fail_nores:
> + isif_remove(isif, pdev);
> + return status;
> +}
> +
> +/*
> + * vpfe_isif_cleanup - isif module cleanup
> + * @isif: pointer to isif subdevice
> + * @dev: pointer to platform device structure
> + */
> +void
> +vpfe_isif_cleanup(struct vpfe_isif_device *isif, struct platform_device *pdev)
> +{
> + isif_remove(isif, pdev);
> +}
> diff --git a/drivers/media/platform/ti-vpfe/am437x_isif.h b/drivers/media/platform/ti-vpfe/am437x_isif.h
> new file mode 100644
> index 0000000..c8af122
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/am437x_isif.h
> @@ -0,0 +1,355 @@
> +/*
> + * TI AM437x Image Sensor Interface device API
> + *
> + * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
> + *
> + * Benoit Parrot <bparrot@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _AM437X_ISIF_H
> +#define _AM437X_ISIF_H
> +
> +#ifdef __KERNEL__
> +#include <linux/videodev2.h>
> +#include <linux/device.h>
> +#include <linux/io.h>
> +#include "am437x_isif_regs.h"
> +#include "vpfe_capture.h"
> +
> +enum isif_pixfmt {
> + ISIF_PIXFMT_RAW,
> + ISIF_PIXFMT_YCBCR_16BIT,
> + ISIF_PIXFMT_YCBCR_8BIT
> +};
> +
> +enum isif_frmfmt {
> + ISIF_FRMFMT_PROGRESSIVE,
> + ISIF_FRMFMT_INTERLACED
> +};
> +
> +/* PIXEL ORDER IN MEMORY from LSB to MSB */
> +/* only applicable for 8-bit input mode */
> +enum isif_pixorder {
> + ISIF_PIXORDER_YCBYCR,
> + ISIF_PIXORDER_CBYCRY,
> +};
> +
> +enum isif_buftype {
> + ISIF_BUFTYPE_FLD_INTERLEAVED,
> + ISIF_BUFTYPE_FLD_SEPARATED
> +};
> +
> +
> +/* enum for No of pixel per line to be avg. in Black Clamping*/
> +enum isif_sample_length {
> + ISIF_SAMPLE_1PIXELS,
> + ISIF_SAMPLE_2PIXELS,
> + ISIF_SAMPLE_4PIXELS,
> + ISIF_SAMPLE_8PIXELS,
> + ISIF_SAMPLE_16PIXELS
> +};
> +
> +/* enum for No of lines in Black Clamping */
> +enum isif_sample_line {
> + ISIF_SAMPLE_1LINES,
> + ISIF_SAMPLE_2LINES,
> + ISIF_SAMPLE_4LINES,
> + ISIF_SAMPLE_8LINES,
> + ISIF_SAMPLE_16LINES
> +};
> +
> +/* enum for Alaw gamma width */
> +enum isif_gamma_width {
> + ISIF_GAMMA_BITS_15_6, /* use bits 15-6 for gamma */
> + ISIF_GAMMA_BITS_14_5,
> + ISIF_GAMMA_BITS_13_4,
> + ISIF_GAMMA_BITS_12_3,
> + ISIF_GAMMA_BITS_11_2,
> + ISIF_GAMMA_BITS_10_1,
> + ISIF_GAMMA_BITS_09_0 /* use bits 9-0 for gamma */
> +};
> +
> +/* returns the highest bit used for the gamma */
> +static inline u8 isif_gamma_width_max_bit(enum isif_gamma_width width)
> +{
> + return 15 - width;
> +}
> +
> +enum isif_data_size {
> + ISIF_DATA_16BITS,
> + ISIF_DATA_15BITS,
> + ISIF_DATA_14BITS,
> + ISIF_DATA_13BITS,
> + ISIF_DATA_12BITS,
> + ISIF_DATA_11BITS,
> + ISIF_DATA_10BITS,
> + ISIF_DATA_8BITS
> +};
> +
> +/* returns the highest bit used for this data size */
> +static inline u8 isif_data_size_max_bit(enum isif_data_size sz)
> +{
> + return sz == ISIF_DATA_8BITS ? 7 : 15 - sz;
> +}
> +
> +/* structure for ALaw */
> +struct isif_a_law {
> + /* Enable/disable A-Law */
> + unsigned char enable;
> + /* Gamma Width Input */
> + enum isif_gamma_width gamma_wd;
> +};
> +
> +/* structure for Black Clamping */
> +struct isif_black_clamp {
> + unsigned char enable;
> + /* only if bClampEnable is TRUE */
> + enum isif_sample_length sample_pixel;
> + /* only if bClampEnable is TRUE */
> + enum isif_sample_line sample_ln;
> + /* only if bClampEnable is TRUE */
> + unsigned short start_pixel;
> + /* only if bClampEnable is TRUE */
> + unsigned short sgain;
> + /* only if bClampEnable is FALSE */
> + unsigned short dc_sub;
> +};
> +
> +/* structure for Black Level Compensation */
> +struct isif_black_compensation {
> + /* Constant value to subtract from Red component */
> + char r;
> + /* Constant value to subtract from Gr component */
> + char gr;
> + /* Constant value to subtract from Blue component */
> + char b;
> + /* Constant value to subtract from Gb component */
> + char gb;
> +};
> +
> +/* Structure for ISIF configuration parameters for raw capture mode passed
> + * by application
> + */
> +struct isif_config_params_raw {
> + /* data size value from 8 to 16 bits */
> + enum isif_data_size data_sz;
> + /* Structure for Optional A-Law */
> + struct isif_a_law alaw;
> + /* Structure for Optical Black Clamp */
> + struct isif_black_clamp blk_clamp;
> + /* Structure for Black Compensation */
> + struct isif_black_compensation blk_comp;
> +};
> +
> +
> +/* Define for extra pixel/line and extra lines/frame */
> +#define NUM_EXTRAPIXELS 8
> +#define NUM_EXTRALINES 8
> +
> +/* settings for commonly used video formats */
> +#define ISIF_WIN_PAL {0, 0, 720, 576}
> +/* ntsc square pixel */
> +#define ISIF_WIN_VGA {0, 0, (640 + NUM_EXTRAPIXELS), (480 + NUM_EXTRALINES)}
> +#define ISIF_WIN_SVGA {0, 0, (800), (600)}
> +
> +/* Structure for ISIF configuration parameters for raw capture mode */
> +struct isif_params_raw {
> + /* pixel format */
> + enum isif_pixfmt pix_fmt;
> + /* progressive or interlaced frame */
> + enum isif_frmfmt frm_fmt;
> + /* v4l2 format for reference */
> + struct v4l2_format fmt;
> + /* video window */
> + struct v4l2_rect win;
> + /* Current Format Bytes Per Pixels */
> + unsigned int bytesperpixel;
> + /* Current Format Bytes per Lines
> + * (Aligned to 32 bytes) used for HORZ_INFO
> + */
> + unsigned int bytesperline;
> + /* field id polarity */
> + enum vpfe_pin_pol fid_pol;
> + /* vertical sync polarity */
> + enum vpfe_pin_pol vd_pol;
> + /* horizontal sync polarity */
> + enum vpfe_pin_pol hd_pol;
> + /* interleaved or separated fields */
> + enum isif_buftype buf_type;
> + /*
> + * enable to store the image in inverse
> + * order in memory(bottom to top)
> + */
> + unsigned char image_invert_enable;
> + /* configurable paramaters */
> + struct isif_config_params_raw config_params;
> +};
> +
> +struct isif_params_ycbcr {
> + /* pixel format */
> + enum isif_pixfmt pix_fmt;
> + /* progressive or interlaced frame */
> + enum isif_frmfmt frm_fmt;
> + /* v4l2 format for reference */
> + struct v4l2_format fmt;
> + /* video window */
> + struct v4l2_rect win;
> + /* Current Format Bytes Per Pixels */
> + unsigned int bytesperpixel;
> + /* Current Format Bytes per Lines
> + * (Aligned to 32 bytes) used for HORZ_INFO
> + */
> + unsigned int bytesperline;
> + /* field id polarity */
> + enum vpfe_pin_pol fid_pol;
> + /* vertical sync polarity */
> + enum vpfe_pin_pol vd_pol;
> + /* horizontal sync polarity */
> + enum vpfe_pin_pol hd_pol;
> + /* enable BT.656 embedded sync mode */
> + int bt656_enable;
> + /* cb:y:cr:y or y:cb:y:cr in memory */
> + enum isif_pixorder pix_order;
> + /* interleaved or separated fields */
> + enum isif_buftype buf_type;
> +};
> +
> +/*
> + * isif operational configuration
> + */
> +struct isif_oper_config {
> + struct device *dev;
> + /* ISIF interface type */
> + enum vpfe_hw_if_type if_type;
> + /* Raw Bayer configuration */
> + struct isif_params_raw bayer;
> + /* YCbCr configuration */
> + struct isif_params_ycbcr ycbcr;
> + /* ccdc base address */
> + void __iomem *base_addr;
> +};
> +
> +
> +/*
> + * isif hw operations
> + */
> +struct vpfe_isif_device;
> +
> +struct isif_hw_ops {
> + /* Pointer to initialize function to initialize isif device */
> + int (*open)(struct vpfe_isif_device *isif, struct device *dev);
> + /* Pointer to deinitialize function */
> + int (*close)(struct vpfe_isif_device *isif,
> + struct device *dev);
> + /* set isif base address */
> + void (*set_isif_base)(struct vpfe_isif_device *isif,
> + void *base, int size);
> + /* Pointer to function to enable or disable isif */
> + void (*enable)(struct vpfe_isif_device *isif, int en);
> + /* reset sbl. only for 6446 */
> + void (*reset)(struct vpfe_isif_device *isif);
> + /* enable output to sdram */
> + void (*enable_out_to_sdram)(struct vpfe_isif_device *isif,
> + int en);
> + /* Pointer to function to set hw parameters */
> + int (*set_hw_if_params)(struct vpfe_isif_device *isif,
> + struct vpfe_hw_if_param *param);
> + /* get interface parameters */
> + int (*get_hw_if_params)(struct vpfe_isif_device *isif,
> + struct vpfe_hw_if_param *param);
> + /*
> + * Pointer to function to set parameters. Used
> + * for implementing VPFE_S_ISIF_PARAMS
> + */
> + int (*set_params)(struct vpfe_isif_device *isif,
> + void __user *params);
> + /*
> + * Pointer to function to get parameter. Used
> + * for implementing VPFE_G_ISIF_PARAMS
> + */
> + int (*get_params)(struct vpfe_isif_device *isif,
> + void __user *params);
> + /* Pointer to function to configure isif */
> + int (*configure)(struct vpfe_isif_device *isif);
> +
> + /* Pointer to function to set buffer type */
> + int (*set_buftype)(struct vpfe_isif_device *isif,
> + enum isif_buftype buf_type);
> + /* Pointer to function to get buffer type */
> + enum isif_buftype (*get_buftype)(struct vpfe_isif_device *isif);
> + /* Pointer to function to set frame format */
> + int (*set_frame_format)(struct vpfe_isif_device *isif,
> + enum isif_frmfmt frm_fmt);
> + /* Pointer to function to get frame format */
> + enum isif_frmfmt (*get_frame_format)(struct vpfe_isif_device *isif);
> + /* enumerate hw pix formats */
> + int (*enum_pix)(struct vpfe_isif_device *isif, u32 *hw_pix, int i);
> + /* Pointer to function to set buffer type */
> + u32 (*get_pixel_format)(struct vpfe_isif_device *isif);
> + /* Pointer to function to get pixel format. */
> + int (*set_pixel_format)(struct vpfe_isif_device *isif, u32 pixfmt);
> + /* Pointer to function to set image window */
> + int (*set_image_window)(struct vpfe_isif_device *isif,
> + struct v4l2_rect *win, unsigned int bpp);
> + /* Pointer to function to set image window */
> + void (*get_image_window)(struct vpfe_isif_device *isif,
> + struct v4l2_rect *win);
> + /* Pointer to function to get line length */
> + unsigned int (*get_line_length)(struct vpfe_isif_device *isif);
> +
> + /* Query ISIF control IDs */
> + int (*queryctrl)(struct vpfe_isif_device *isif,
> + struct v4l2_queryctrl *qctrl);
> + /* Set ISIF control */
> + int (*set_control)(struct vpfe_isif_device *isif,
> + struct v4l2_control *ctrl);
> + /* Get ISIF control */
> + int (*get_control)(struct vpfe_isif_device *isif,
> + struct v4l2_control *ctrl);
> + /* Clear Interrupt */
> + void (*clear_intr)(struct vpfe_isif_device *isif, int vdint);
> + /* Read Interrupt Status */
> + int (*intr_status)(struct vpfe_isif_device *isif);
> + /* Enable Interrupt */
> + int (*intr_enable)(struct vpfe_isif_device *isif, int vdint);
> + /* Disable Interrupt */
> + int (*intr_disable)(struct vpfe_isif_device *isif, int vdint);
> +
> + /* Pointer to function to set frame buffer address */
> + void (*setfbaddr)(struct vpfe_isif_device *isif, unsigned long addr);
> + /* Pointer to function to get field id */
> + int (*getfid)(struct vpfe_isif_device *isif);
> +};
> +
> +struct vpfe_isif_device {
> + /* isif device name */
> + char name[32];
> + /* module owner */
> + struct module *owner;
> + struct isif_oper_config isif_cfg;
> + /* hw ops */
> + struct isif_hw_ops hw_ops;
> + /* ISIF Save/Restore context */
> + u32 isif_ctx[ISIF_REG_END / sizeof(u32)];
> +
> +};
> +
> +int vpfe_isif_init(struct vpfe_isif_device *isif,
> + struct platform_device *pdev);
> +void vpfe_isif_cleanup(struct vpfe_isif_device *isif,
> + struct platform_device *pdev);
> +int isif_remove(struct vpfe_isif_device *isif, struct platform_device *pdev);
> +int isif_suspend(struct vpfe_isif_device *isif, struct device *dev);
> +int isif_resume(struct vpfe_isif_device *isif, struct device *dev);
> +
> +#endif
> +#endif
> diff --git a/drivers/media/platform/ti-vpfe/am437x_isif_regs.h b/drivers/media/platform/ti-vpfe/am437x_isif_regs.h
> new file mode 100644
> index 0000000..843e3ff
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/am437x_isif_regs.h
> @@ -0,0 +1,144 @@
> +/*
> + * TI AM437x Image Sensor Interface Registers
> + *
> + * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
> + *
> + * Benoit Parrot <bparrot@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _AM437X_ISIF_REGS_H
> +#define _AM437X_ISIF_REGS_H
> +
> +/**************************************************************************\
> +* Register OFFSET Definitions
> +\**************************************************************************/
> +#define ISIF_PID 0x0
> +#define ISIF_PCR 0x4
> +#define ISIF_SYN_MODE 0x8
> +#define ISIF_HD_VD_WID 0xc
> +#define ISIF_PIX_LINES 0x10
> +#define ISIF_HORZ_INFO 0x14
> +#define ISIF_VERT_START 0x18
> +#define ISIF_VERT_LINES 0x1c
> +#define ISIF_CULLING 0x20
> +#define ISIF_HSIZE_OFF 0x24
> +#define ISIF_SDOFST 0x28
> +#define ISIF_SDR_ADDR 0x2c
> +#define ISIF_CLAMP 0x30
> +#define ISIF_DCSUB 0x34
> +#define ISIF_COLPTN 0x38
> +#define ISIF_BLKCMP 0x3c
> +#define ISIF_VDINT 0x48
> +#define ISIF_ALAW 0x4c
> +#define ISIF_REC656IF 0x50
> +#define ISIF_CCDCFG 0x54
> +#define ISIF_DMA_CNTL 0x98
> +#define ISIF_VPFE_SYSCONFIG 0x104
> +#define ISIF_VPFE_CONFIG 0x108
> +#define ISIF_VPFE_IRQ_EOI 0x110
> +#define ISIF_VPFE_IRQ_STATUS_RAW 0x114
> +#define ISIF_VPFE_IRQ_STATUS 0x118
> +#define ISIF_VPFE_IRQ_ENABLE_SET 0x11c
> +#define ISIF_VPFE_IRQ_ENABLE_CLR 0x120
> +#define ISIF_REG_END 0x124
> +
> +/***************************************************************
> +* Define for various register bit mask and shifts for ISIF
> +****************************************************************/
> +#define ISIF_FID_POL_MASK 1
> +#define ISIF_FID_POL_SHIFT 4
> +#define ISIF_HD_POL_MASK 1
> +#define ISIF_HD_POL_SHIFT 3
> +#define ISIF_VD_POL_MASK 1
> +#define ISIF_VD_POL_SHIFT 2
> +#define ISIF_HSIZE_OFF_MASK 0xffffffe0
> +#define ISIF_32BYTE_ALIGN_VAL 31
> +#define ISIF_FRM_FMT_MASK 0x1
> +#define ISIF_FRM_FMT_SHIFT 7
> +#define ISIF_DATA_SZ_MASK 7
> +#define ISIF_DATA_SZ_SHIFT 8
> +#define ISIF_PIX_FMT_MASK 3
> +#define ISIF_PIX_FMT_SHIFT 12
> +#define ISIF_VP2SDR_DISABLE 0xFFFBFFFF
> +#define ISIF_WEN_ENABLE (1 << 17)
> +#define ISIF_SDR2RSZ_DISABLE 0xFFF7FFFF
> +#define ISIF_VDHDEN_ENABLE (1 << 16)
> +#define ISIF_LPF_ENABLE (1 << 14)
> +#define ISIF_ALAW_ENABLE (1 << 3)
> +#define ISIF_ALAW_GAMMA_WD_MASK 7
> +#define ISIF_BLK_CLAMP_ENABLE (1 << 31)
> +#define ISIF_BLK_SGAIN_MASK 0x1F
> +#define ISIF_BLK_ST_PXL_MASK 0x7FFF
> +#define ISIF_BLK_ST_PXL_SHIFT 10
> +#define ISIF_BLK_SAMPLE_LN_MASK 7
> +#define ISIF_BLK_SAMPLE_LN_SHIFT 28
> +#define ISIF_BLK_SAMPLE_LINE_MASK 7
> +#define ISIF_BLK_SAMPLE_LINE_SHIFT 25
> +#define ISIF_BLK_DC_SUB_MASK 0x03FFF
> +#define ISIF_BLK_COMP_MASK 0xFF
> +#define ISIF_BLK_COMP_GB_COMP_SHIFT 8
> +#define ISIF_BLK_COMP_GR_COMP_SHIFT 16
> +#define ISIF_BLK_COMP_R_COMP_SHIFT 24
> +#define ISIF_LATCH_ON_VSYNC_DISABLE (1 << 15)
> +#define ISIF_DATA_PACK_ENABLE (1 << 11)
> +#define ISIF_HORZ_INFO_SPH_SHIFT 16
> +#define ISIF_VERT_START_SLV0_SHIFT 16
> +#define ISIF_VDINT_VDINT0_SHIFT 16
> +#define ISIF_VDINT_VDINT1_MASK 0xFFFF
> +#define ISIF_PPC_RAW 1
> +#define ISIF_DCSUB_DEFAULT_VAL 0
> +#define ISIF_CLAMP_DEFAULT_VAL 0
> +#define ISIF_COLPTN_VAL 0xBB11BB11
> +#define ISIF_TWO_BYTES_PER_PIXEL 2
> +#define ISIF_INTERLACED_IMAGE_INVERT 0x4B6D
> +#define ISIF_INTERLACED_NO_IMAGE_INVERT 0x0249
> +#define ISIF_PROGRESSIVE_IMAGE_INVERT 0x4000
> +#define ISIF_PROGRESSIVE_NO_IMAGE_INVERT 0
> +#define ISIF_INTERLACED_HEIGHT_SHIFT 1
> +#define ISIF_SYN_MODE_INPMOD_SHIFT 12
> +#define ISIF_SYN_MODE_INPMOD_MASK 3
> +#define ISIF_SYN_MODE_8BITS (7 << 8)
> +#define ISIF_SYN_MODE_10BITS (6 << 8)
> +#define ISIF_SYN_MODE_11BITS (5 << 8)
> +#define ISIF_SYN_MODE_12BITS (4 << 8)
> +#define ISIF_SYN_MODE_13BITS (3 << 8)
> +#define ISIF_SYN_MODE_14BITS (2 << 8)
> +#define ISIF_SYN_MODE_15BITS (1 << 8)
> +#define ISIF_SYN_MODE_16BITS (0 << 8)
> +#define ISIF_SYN_FLDMODE_MASK 1
> +#define ISIF_SYN_FLDMODE_SHIFT 7
> +#define ISIF_REC656IF_BT656_EN 3
> +#define ISIF_SYN_MODE_VD_POL_NEGATIVE (1 << 2)
> +#define ISIF_CCDCFG_Y8POS_SHIFT 11
> +#define ISIF_CCDCFG_BW656_10BIT (1 << 5)
> +#define ISIF_SDOFST_FIELD_INTERLEAVED 0x249
> +#define ISIF_NO_CULLING 0xffff00ff
> +#define ISIF_VPFE_VDINT0 (1 << 0)
> +#define ISIF_VPFE_VDINT1 (1 << 1)
> +#define ISIF_VPFE_VDINT2 (1 << 2)
> +#define ISIF_DMA_CNTL_OVERFLOW (1 << 31)
> +
> +#define ISIF_VPFE_CONFIG_PCLK_INV_SHIFT 0
> +#define ISIF_VPFE_CONFIG_PCLK_INV_MASK 1
> +#define ISIF_VPFE_CONFIG_PCLK_INV_NOT_INV 0
> +#define ISIF_VPFE_CONFIG_PCLK_INV_INV 1
> +#define ISIF_VPFE_CONFIG_VPFE_EN_SHIFT 1
> +#define ISIF_VPFE_CONFIG_VPFE_EN_MASK 2
> +#define ISIF_VPFE_CONFIG_VPFE_EN_DISABLE 0
> +#define ISIF_VPFE_CONFIG_VPFE_EN_ENABLE 1
> +#define ISIF_VPFE_CONFIG_VPFE_ST_SHIFT 2
> +#define ISIF_VPFE_CONFIG_VPFE_ST_MASK 4
> +#define ISIF_VPFE_CONFIG_VPFE_ST_OCP_ACTIVE 0
> +#define ISIF_VPFE_CONFIG_VPFE_ST_OCP_STANDBY 1
> +
> +
> +#endif
> diff --git a/drivers/media/platform/ti-vpfe/vpfe_capture.c b/drivers/media/platform/ti-vpfe/vpfe_capture.c
> new file mode 100644
> index 0000000..fa54756
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/vpfe_capture.c
> @@ -0,0 +1,2478 @@
> +/*
> + * TI VPFE Multi instance Capture Driver
> + *
> + * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
> + *
> + * Benoit Parrot <bparrot@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * Detail description:
> + * VPFE Capture driver allows applications to capture and stream video
> + * frames on TI AM43xx SoCs from a YUV or Raw Bayer source such as
> + * decoder or image sensor device.
> + *
> + * This SoC has a dual Video Processing Front End (VPFE) instances for
> + * capturing video/raw image data into memory buffers. The data can then
> + * be stored or passed on to a compatible display device.
> + * A typical EVM using these SoCs have following high level configuration.
> + *
> + *
> + * decoder(OV2659/ YUV/
> + * TVP514x) --> Raw Bayer RGB ---> VPFE (CCDC/ISIF)
> + * data input | |
> + * V |
> + * SDRAM |
> + * V
> + * Image Processor
> + * |
> + * V
> + * SDRAM
> + *
> + * The data flow happens from a sensor/decoder connected to the VPFE over a
> + * YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
> + * and to the input of VPFE. The input data is first passed through
> + * ISIF (Image Sensor Interface). The ISIF does very little or no
> + * processing on YUV data and does lightly pre-process Raw Bayer RGB
> + * data through data gain/offset etc. After this, data is written to SDRAM.
> + *
> + * Features supported
> + * - MMAP IO
> + * - Capture using OV2659 in raw mode
> + * - Support for interfacing decoders/sensor using sub-device model
> + * - Support for asynchronous sub-device registration
> + * - Support media controller API
> + * - Support videobuf2 buffer API
> + * - Work with AM437x ISIF to do Raw Bayer RGB/YUV data capture
> + * to SDRAM.
> + * TODO list
> + * - Support for control ioctls
> + */
> +
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/init.h>
> +#include <linux/platform_device.h>
> +#include <linux/interrupt.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-of.h>
> +#include <linux/io.h>
> +#include "vpfe_capture.h"
> +#include <media/tvp514x.h>
> +
> +#include "am437x_isif_regs.h"
> +
> +static int debug;
> +static u32 numbuffers = 3;
> +static u32 bufsize = (800 * 600 * 2);
> +
> +module_param(numbuffers, uint, S_IRUGO);
> +module_param(bufsize, uint, S_IRUGO);
> +module_param(debug, int, 0644);
> +
> +MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
> +MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
> +MODULE_PARM_DESC(debug, "Debug level 0-1");
> +
> +MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Texas Instruments");
> +
> +#define MAX_WIDTH 4096
> +#define MAX_HEIGHT 4096
> +
> +/* standard information */
> +struct vpfe_standard {
> + v4l2_std_id std_id;
> + unsigned int width;
> + unsigned int height;
> + struct v4l2_fract pixelaspect;
> + /* 0 - progressive, 1 - interlaced */
> + int frame_format;
> +};
> +
> +/* MULTI: Global default OK for multi-instance use */
> +/* data structures */
> +static struct vpfe_config_params config_params = {
> + .min_numbuffers = 3,
> + .numbuffers = 3,
> + .min_bufsize = 800 * 600 * 2,
> + .device_bufsize = 800 * 600 * 2,
> +};
> +
> +static const struct vpfe_standard vpfe_standards[] = {
> + {V4L2_STD_525_60, 800, 600, {1, 1}, 0},
> + {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
> +};
> +
> +/* map mbus_fmt to pixelformat */
> +static void mbus_to_pix(struct vpfe_device *vpfe,
> + const struct v4l2_mbus_framefmt *mbus,
> + struct v4l2_pix_format *pix, unsigned int *bpp)
> +{
> + unsigned int bus_width =
> + vpfe->current_subdev->isif_if_params.bus_width;
> +
> + switch (mbus->code) {
> + case V4L2_MBUS_FMT_UYVY8_2X8:
> + pix->pixelformat = V4L2_PIX_FMT_UYVY;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + case V4L2_MBUS_FMT_YUYV8_2X8:
> + pix->pixelformat = V4L2_PIX_FMT_YUYV;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + case V4L2_MBUS_FMT_YVYU8_2X8:
> + pix->pixelformat = V4L2_PIX_FMT_YVYU;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + case V4L2_MBUS_FMT_VYUY8_2X8:
> + pix->pixelformat = V4L2_PIX_FMT_VYUY;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + case V4L2_MBUS_FMT_YDYUYDYV8_1X16:
> + pix->pixelformat = V4L2_PIX_FMT_NV12;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_Y12_1X12:
> + pix->pixelformat = V4L2_PIX_FMT_YUV420;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_YUYV8_1_5X8:
> + pix->pixelformat = V4L2_PIX_FMT_YUV420;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_SBGGR8_1X8:
> + pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_SGBRG8_1X8:
> + pix->pixelformat = V4L2_PIX_FMT_SGBRG8;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_SGRBG8_1X8:
> + pix->pixelformat = V4L2_PIX_FMT_SGRBG8;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_SRGGB8_1X8:
> + pix->pixelformat = V4L2_PIX_FMT_SRGGB8;
> + *bpp = (bus_width == 10) ? 2 : 1;
> + break;
> +
> + case V4L2_MBUS_FMT_BGR565_2X8_BE:
> + pix->pixelformat = V4L2_PIX_FMT_RGB565;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + case V4L2_MBUS_FMT_RGB565_2X8_BE:
> + pix->pixelformat = V4L2_PIX_FMT_RGB565X;
> + *bpp = (bus_width == 10) ? 4 : 2;
> + break;
> +
> + default:
> + pr_err("Invalid mbus code set\n");
> + *bpp = 1;
> + }
> +
> + pix->bytesperline = pix->width * *bpp;
> + /* pitch should be 32 bytes aligned */
> + pix->bytesperline = ALIGN(pix->bytesperline, 32);
> + if (pix->pixelformat == V4L2_PIX_FMT_NV12)
> + pix->sizeimage = pix->bytesperline * pix->height +
> + ((pix->bytesperline * pix->height) >> 1);
> + else if (pix->pixelformat == V4L2_PIX_FMT_YUV420)
> + pix->sizeimage = pix->bytesperline * pix->height +
> + ((pix->bytesperline * pix->height) >> 1);
> + else
> + pix->sizeimage = pix->bytesperline * pix->height;
> +}
> +
> +/* map mbus_fmt to pixelformat */
> +static int pix_to_mbus(struct vpfe_device *vpfe,
> + struct v4l2_pix_format *pix,
> + struct v4l2_mbus_framefmt *mbus)
> +{
> + memset(mbus, 0, sizeof(*mbus));
> + mbus->width = pix->width;
> + mbus->height = pix->height;
> +
> + switch (pix->pixelformat) {
> + case V4L2_PIX_FMT_UYVY:
> + mbus->code = V4L2_MBUS_FMT_UYVY8_2X8;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + mbus->code = V4L2_MBUS_FMT_YUYV8_2X8;
> + break;
> + case V4L2_PIX_FMT_YVYU:
> + mbus->code = V4L2_MBUS_FMT_YVYU8_2X8;
> + break;
> + case V4L2_PIX_FMT_VYUY:
> + mbus->code = V4L2_MBUS_FMT_VYUY8_2X8;
> + break;
> + case V4L2_PIX_FMT_NV12:
> + mbus->code = V4L2_MBUS_FMT_YDYUYDYV8_1X16;
> + break;
> + case V4L2_PIX_FMT_YUV420:
> + mbus->code = V4L2_MBUS_FMT_Y12_1X12;
> + break;
> + case V4L2_PIX_FMT_SBGGR8:
> + mbus->code = V4L2_MBUS_FMT_SBGGR8_1X8;
> + break;
> + case V4L2_PIX_FMT_SGBRG8:
> + mbus->code = V4L2_MBUS_FMT_SGBRG8_1X8;
> + break;
> + case V4L2_PIX_FMT_SGRBG8:
> + mbus->code = V4L2_MBUS_FMT_SGRBG8_1X8;
> + break;
> + case V4L2_PIX_FMT_SRGGB8:
> + mbus->code = V4L2_MBUS_FMT_SRGGB8_1X8;
> + break;
> + case V4L2_PIX_FMT_RGB565:
> + mbus->code = V4L2_MBUS_FMT_BGR565_2X8_BE;
> + break;
> + case V4L2_PIX_FMT_RGB565X:
> + mbus->code = V4L2_MBUS_FMT_RGB565_2X8_BE;
> + break;
> + default:
> + pr_err("Invalid pixel code\n");
> + return -EINVAL;
> + }
> +
> + mbus->colorspace = pix->colorspace;
> + mbus->field = pix->field;
> +
> + return 0;
> +}
> +
> +static int cmp_v4l2_format(const struct v4l2_format *lhs,
> + const struct v4l2_format *rhs)
> +{
> + return lhs->type == rhs->type &&
> + lhs->fmt.pix.width == rhs->fmt.pix.width &&
> + lhs->fmt.pix.height == rhs->fmt.pix.height &&
> + lhs->fmt.pix.pixelformat == rhs->fmt.pix.pixelformat &&
> + lhs->fmt.pix.field == rhs->fmt.pix.field &&
> + lhs->fmt.pix.colorspace == rhs->fmt.pix.colorspace;
> +}
> +
> +/*
> + * vpfe_get_isif_image_format - Get image parameters based on ISIF settings
> + */
> +static int vpfe_get_isif_image_format(struct vpfe_device *vpfe,
> + struct v4l2_format *f)
> +{
> + struct v4l2_rect image_win;
> + enum isif_buftype buf_type;
> + enum isif_frmfmt frm_fmt;
> +
> + memset(f, 0, sizeof(*f));
> + f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
> + vpfe->vpfe_isif.hw_ops.get_image_window(
> + &vpfe->vpfe_isif, &image_win);
> + f->fmt.pix.width = image_win.width;
> + f->fmt.pix.height = image_win.height;
> + f->fmt.pix.bytesperline =
> + vpfe->vpfe_isif.hw_ops.get_line_length(
> + &vpfe->vpfe_isif);
> + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
> + f->fmt.pix.height;
> + buf_type = vpfe->vpfe_isif.hw_ops.get_buftype(
> + &vpfe->vpfe_isif);
> + f->fmt.pix.pixelformat =
> + vpfe->vpfe_isif.hw_ops.get_pixel_format(
> + &vpfe->vpfe_isif);
> + frm_fmt =
> + vpfe->vpfe_isif.hw_ops.get_frame_format(
> + &vpfe->vpfe_isif);
> + if (frm_fmt == ISIF_FRMFMT_PROGRESSIVE) {
> + f->fmt.pix.field = V4L2_FIELD_NONE;
> + } else if (frm_fmt == ISIF_FRMFMT_INTERLACED) {
> + if (buf_type == ISIF_BUFTYPE_FLD_INTERLEAVED) {
> + f->fmt.pix.field = V4L2_FIELD_INTERLACED;
> + } else if (buf_type == ISIF_BUFTYPE_FLD_SEPARATED) {
> + f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
> + } else {
> + dev_err(vpfe->dev, "Invalid buf_type\n");
> + return -EINVAL;
> + }
> + } else {
> + dev_err(vpfe->dev, "Invalid frm_fmt\n");
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * vpfe_config_isif_image_format()
> + * For a pix format, configure isif to setup the capture
> + */
> +static int vpfe_config_isif_image_format(struct vpfe_device *vpfe)
> +{
> + enum isif_frmfmt frm_fmt = ISIF_FRMFMT_INTERLACED;
> + int ret = 0;
> +
> + if (vpfe->vpfe_isif.hw_ops.set_pixel_format(
> + &vpfe->vpfe_isif,
> + vpfe->fmt.fmt.pix.pixelformat) < 0) {
> + dev_err(vpfe->dev,
> + "couldn't set pix format in isif\n");
> + return -EINVAL;
> + }
> + /* configure the image window */
> + vpfe->vpfe_isif.hw_ops.set_image_window(
> + &vpfe->vpfe_isif,
> + &vpfe->crop, vpfe->bpp);
> +
> + switch (vpfe->fmt.fmt.pix.field) {
> + case V4L2_FIELD_INTERLACED:
> + /* do nothing, since it is default */
> + ret = vpfe->vpfe_isif.hw_ops.set_buftype(
> + &vpfe->vpfe_isif,
> + ISIF_BUFTYPE_FLD_INTERLEAVED);
> + break;
> + case V4L2_FIELD_NONE:
> + frm_fmt = ISIF_FRMFMT_PROGRESSIVE;
> + /* buffer type only applicable for interlaced scan */
> + break;
> + case V4L2_FIELD_SEQ_TB:
> + ret = vpfe->vpfe_isif.hw_ops.set_buftype(
> + &vpfe->vpfe_isif,
> + ISIF_BUFTYPE_FLD_SEPARATED);
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + /* set the frame format */
> + if (!ret)
> + ret = vpfe->vpfe_isif.hw_ops.set_frame_format(
> + &vpfe->vpfe_isif, frm_fmt);
> +
> + return ret;
> +}
> +/*
> + * vpfe_config_image_format()
> + * For a given standard, this functions sets up the default
> + * pix format & crop values in the vpfe device and isif. It first
> + * starts with defaults based values from the standard table.
> + * It then checks if sub device support g_mbus_fmt and then override the
> + * values based on that.Sets crop values to match with scan resolution
> + * starting at 0,0. It calls vpfe_config_isif_image_format() set the
> + * values in isif
> + */
> +static int vpfe_config_image_format(struct vpfe_device *vpfe,
> + v4l2_std_id std_id)
> +{
> + struct vpfe_subdev_info *sdinfo = vpfe->current_subdev;
> + struct v4l2_mbus_framefmt mbus_fmt;
> + struct v4l2_pix_format *pix = &vpfe->fmt.fmt.pix;
> + struct v4l2_pix_format pix_test;
> + struct v4l2_subdev_format sd_fmt;
> + int i, ret = 0;
> +
> + for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
> + if (vpfe_standards[i].std_id & std_id) {
> + vpfe->std_info.active_pixels =
> + vpfe_standards[i].width;
> + vpfe->std_info.active_lines =
> + vpfe_standards[i].height;
> + vpfe->std_info.frame_format =
> + vpfe_standards[i].frame_format;
> + vpfe->std_index = i;
> + break;
> + }
> + }
> +
> + if (i == ARRAY_SIZE(vpfe_standards)) {
> + dev_err(vpfe->dev, "standard not supported\n");
> + return -EINVAL;
> + }
> +
> + vpfe->crop.top = 0;
> + vpfe->crop.left = 0;
> + vpfe->crop.width = vpfe->std_info.active_pixels;
> + vpfe->crop.height = vpfe->std_info.active_lines;
> + pix->width = vpfe->crop.width;
> + pix->height = vpfe->crop.height;
> +
> + /* first field and frame format based on standard frame format */
> + if (vpfe->std_info.frame_format) {
> + pix->field = V4L2_FIELD_INTERLACED;
> + /* assume V4L2_PIX_FMT_UYVY as default */
> + pix->pixelformat = V4L2_PIX_FMT_YUYV;
> + v4l2_fill_mbus_format(&mbus_fmt, pix,
> + V4L2_MBUS_FMT_YUYV10_2X10);
> + } else {
> + pix->field = V4L2_FIELD_NONE;
> + /* assume V4L2_PIX_FMT_SBGGR8 */
> + pix->pixelformat = V4L2_PIX_FMT_YUYV;
> + v4l2_fill_mbus_format(&mbus_fmt, pix,
> + V4L2_MBUS_FMT_YUYV10_2X10);
> + }
> +
> + /* copy pix format for testing */
> + pix_test = *pix;
> +
> + if (!v4l2_device_has_op(&vpfe->v4l2_dev, video, g_mbus_fmt)) {
> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> +
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev,
> + sdinfo->grp_id, pad, get_fmt, NULL, &sd_fmt);
> +
> + if (ret && ret != -ENOIOCTLCMD) {
> + dev_err(vpfe->dev,
> + "error in getting g_mbus_fmt from sub device\n");
> + return ret;
> + }
> + } else {
> + /* if sub device supports g_mbus_fmt, override the defaults */
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev,
> + sdinfo->grp_id, video, g_mbus_fmt, &mbus_fmt);
> +
> + if (ret && ret != -ENOIOCTLCMD) {
> + dev_err(vpfe->dev,
> + "error in getting g_mbus_fmt from sub device\n");
> + return ret;
> + } else if (ret == -ENOIOCTLCMD) {
> + dev_dbg(vpfe->dev,
> + "sub device '%s' does not support g_mbus_fmt\n",
> + sdinfo->name);
> + } else {
> + dev_dbg(vpfe->dev,
> + "v4l2_subdev_call g_mbus_fmt: %d\n", ret);
> + }
> + }
> +
> + /* convert mbus_format to v4l2_format */
> + v4l2_fill_pix_format(pix, &sd_fmt.format);
> + mbus_to_pix(vpfe, &sd_fmt.format, pix, &vpfe->bpp);
> +
> + /* Update the crop window based on found values */
> + vpfe->crop.width = pix->width;
> + vpfe->crop.height = pix->height;
> +
> + /* Sets the values in ISIF */
> + ret = vpfe_config_isif_image_format(vpfe);
> +
> + return ret;
> +}
> +
> +static int vpfe_initialize_device(struct vpfe_device *vpfe)
> +{
> + int ret = 0;
> +
> + /* set first input of current subdevice as the current input */
> + vpfe->current_input = 0;
> +
> + /* set default standard */
> + vpfe->std_index = 0;
> +
> + /* Configure the default format information */
> + ret = vpfe_config_image_format(vpfe,
> + vpfe_standards[vpfe->std_index].std_id);
> + if (ret)
> + return ret;
> +
> + /* now open the isif device to initialize it */
> + ret = vpfe->vpfe_isif.hw_ops.open(
> + &vpfe->vpfe_isif,
> + vpfe->dev);
> + if (!ret)
> + vpfe->initialized = 1;
> +
> + /* Clear all VPFE/ISIF interrupts */
> + if (vpfe->vpfe_isif.hw_ops.clear_intr)
> + vpfe->vpfe_isif.hw_ops.clear_intr(
> + &vpfe->vpfe_isif, -1);
> +
> + return ret;
> +}
> +
> +/*
> + * vpfe_open : It creates object of file handle structure and
> + * stores it in private_data member of filepointer
> + */
> +static int vpfe_open(struct file *file)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh;
> +
> + if (!vpfe->cfg->num_subdevs) {
> + dev_err(vpfe->dev, "No decoder/sensor registered\n");
> + return -ENODEV;
> + }
> +
> + /* Allocate memory for the file handle object */
> + fh = kmalloc(sizeof(*fh), GFP_KERNEL);
> + if (NULL == fh)
> + return -ENOMEM;
> +
> + /* store pointer to fh in private_data member of file */
> + file->private_data = fh;
> + fh->vpfe = vpfe;
> + mutex_lock(&vpfe->lock);
> + /* If decoder is not initialized. initialize it */
> + if (!vpfe->initialized) {
> + if (vpfe_initialize_device(vpfe)) {
> + mutex_unlock(&vpfe->lock);
> + return -ENODEV;
> + }
> + }
> + /* Increment device usrs counter */
> + vpfe->usrs++;
> + /* Set io_allowed member to false */
> + fh->io_allowed = 0;
> + /* Initialize priority of this instance to default priority */
> + fh->prio = V4L2_PRIORITY_UNSET;
> + v4l2_prio_open(&vpfe->prio, &fh->prio);
> + mutex_unlock(&vpfe->lock);
> +
> + return 0;
> +}
> +
> +/**
> + * vpfe_schedule_next_buffer: set next buffer address for capture
> + * @vpfe : ptr to device
> + *
> + * This function will get next buffer from the dma queue and
> + * set the buffer address in the vpfe register for capture.
> + * the buffer is marked active
> + *
> + * Assumes caller is holding vpfe->dma_queue_lock already
> + */
> +static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe)
> +{
> + unsigned long addr;
> +
> + vpfe->next_frm = list_entry(vpfe->dma_queue.next,
> + struct vpfe_cap_buffer, list);
> + list_del(&vpfe->next_frm->list);
> +
> + vpfe->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
> + addr = vb2_dma_contig_plane_dma_addr(&vpfe->next_frm->vb, 0);
> +
> + vpfe->vpfe_isif.hw_ops.setfbaddr(&vpfe->vpfe_isif, addr);
> +}
> +
> +static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe)
> +{
> + unsigned long addr;
> +
> + addr = vb2_dma_contig_plane_dma_addr(&vpfe->next_frm->vb, 0);
> + addr += vpfe->field_off;
> + vpfe->vpfe_isif.hw_ops.setfbaddr(&vpfe->vpfe_isif, addr);
> +}
> +
> +/*
> + * vpfe_process_buffer_complete: process a completed buffer
> + * @vpfe : ptr to device
> + *
> + * This function time stamp the buffer and mark it as DONE. It also
> + * wake up any process waiting on the QUEUE and set the next buffer
> + * as current
> + */
> +static void vpfe_process_buffer_complete(struct vpfe_device *vpfe)
> +{
> + v4l2_get_timestamp(&vpfe->cur_frm->vb.v4l2_buf.timestamp);
> +
> + vb2_buffer_done(&vpfe->cur_frm->vb, VB2_BUF_STATE_DONE);
> + vpfe->cur_frm = vpfe->next_frm;
> +}
> +
> +/*
> + * vpfe_isr : ISR handler for vpfe capture (VINT0)
> + * @irq: irq number
> + * @dev_id: dev_id ptr
> + *
> + * It changes status of the captured buffer, takes next buffer from the queue
> + * and sets its address in VPFE registers
> + */
> +static irqreturn_t vpfe_isr(int irq, void *dev_id)
> +{
> + struct vpfe_device *vpfe = dev_id;
> + int vpfe_intr_status;
> + enum v4l2_field field;
> + int fid;
> +
> + /* Which interrupt did we get */
> + vpfe_intr_status = vpfe->vpfe_isif.hw_ops.intr_status(
> + &vpfe->vpfe_isif);
> +
> + /* if streaming not started, don't do anything */
> + if (!vpfe->started)
> + goto clear_intr;
> +
> + if (vpfe_intr_status & ISIF_VPFE_VDINT0) {
> + field = vpfe->fmt.fmt.pix.field;
> +
> + /* only for 6446 this will be applicable */
> + if (vpfe->vpfe_isif.hw_ops.reset)
> + vpfe->vpfe_isif.hw_ops.reset(
> + &vpfe->vpfe_isif);
> +
> + if (field == V4L2_FIELD_NONE) {
> + /* handle progressive frame capture */
> + if (vpfe->cur_frm != vpfe->next_frm)
> + vpfe_process_buffer_complete(vpfe);
> + goto next_intr;
> + }
> +
> + /* interlaced or TB capture check which field
> + we are in hardware */
> + fid = vpfe->vpfe_isif.hw_ops.getfid(
> + &vpfe->vpfe_isif);
> +
> + /* switch the software maintained field id */
> + vpfe->field_id ^= 1;
> + if (fid == vpfe->field_id) {
> + /* we are in-sync here,continue */
> + if (fid == 0) {
> + /*
> + * One frame is just being captured. If the
> + * next frame is available, release the
> + * current frame and move on
> + */
> + if (vpfe->cur_frm != vpfe->next_frm)
> + vpfe_process_buffer_complete(vpfe);
> + /*
> + * based on whether the two fields are stored
> + * interleavely or separately in memory,
> + * reconfigure the ISIF memory address
> + */
> + if (field == V4L2_FIELD_SEQ_TB)
> + vpfe_schedule_bottom_field(vpfe);
> +
> + goto next_intr;
> + }
> + /*
> + * if one field is just being captured configure
> + * the next frame get the next frame from the empty
> + * queue if no frame is available hold on to the
> + * current buffer
> + */
> + spin_lock(&vpfe->dma_queue_lock);
> + if (!list_empty(&vpfe->dma_queue) &&
> + vpfe->cur_frm == vpfe->next_frm)
> + vpfe_schedule_next_buffer(vpfe);
> + spin_unlock(&vpfe->dma_queue_lock);
> + } else if (fid == 0) {
> + /*
> + * out of sync. Recover from any hardware out-of-sync.
> + * May loose one frame
> + */
> + vpfe->field_id = fid;
> + }
> + }
> +
> +next_intr:
> + if (vpfe_intr_status & ISIF_VPFE_VDINT1) {
> + spin_lock(&vpfe->dma_queue_lock);
> + if ((vpfe->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
> + !list_empty(&vpfe->dma_queue) &&
> + vpfe->cur_frm == vpfe->next_frm)
> + vpfe_schedule_next_buffer(vpfe);
> + spin_unlock(&vpfe->dma_queue_lock);
> + }
> +
> +clear_intr:
> + if (vpfe->vpfe_isif.hw_ops.clear_intr)
> + vpfe->vpfe_isif.hw_ops.clear_intr(
> + &vpfe->vpfe_isif, vpfe_intr_status);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void vpfe_detach_irq(struct vpfe_device *vpfe)
> +{
> + enum isif_frmfmt frame_format;
> + unsigned int intr = ISIF_VPFE_VDINT0;
> +
> + frame_format = vpfe->vpfe_isif.hw_ops.get_frame_format(
> + &vpfe->vpfe_isif);
> + if (frame_format == ISIF_FRMFMT_PROGRESSIVE)
> + intr |= ISIF_VPFE_VDINT1;
> +
> + vpfe->vpfe_isif.hw_ops.intr_disable(
> + &vpfe->vpfe_isif, intr);
> +}
> +
> +static int vpfe_attach_irq(struct vpfe_device *vpfe)
> +{
> + enum isif_frmfmt frame_format;
> + unsigned int intr = ISIF_VPFE_VDINT0;
> +
> + frame_format = vpfe->vpfe_isif.hw_ops.get_frame_format(
> + &vpfe->vpfe_isif);
> + if (frame_format == ISIF_FRMFMT_PROGRESSIVE)
> + intr |= ISIF_VPFE_VDINT1;
> +
> + vpfe->vpfe_isif.hw_ops.intr_enable(
> + &vpfe->vpfe_isif, intr);
> + return 0;
> +}
> +
> +/* vpfe_stop_isif_capture: stop streaming in ccdc/isif */
> +static void vpfe_stop_isif_capture(struct vpfe_device *vpfe)
> +{
> + vpfe->started = 0;
> + vpfe->vpfe_isif.hw_ops.enable(&vpfe->vpfe_isif, 0);
> + if (vpfe->vpfe_isif.hw_ops.enable_out_to_sdram)
> + vpfe->vpfe_isif.hw_ops.enable_out_to_sdram(
> + &vpfe->vpfe_isif, 0);
> +}
> +
> + /*
> + * vpfe_release : function to clean up file close
> + * @filep: file pointer
> + *
> + * This function deletes buffer queue, frees the
> + * buffers and the vpfe file handle
> + */
> +static int vpfe_release(struct file *file)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh = file->private_data;
> + struct vpfe_subdev_info *sdinfo;
> + int ret;
> +
> + /* Get the device lock */
> + mutex_lock(&vpfe->lock);
> + /* if this instance is doing IO */
> + if (fh->io_allowed) {
> + if (vpfe->started) {
> + sdinfo = vpfe->current_subdev;
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev,
> + sdinfo->grp_id,
> + video, s_stream, 0);
> + if (ret && (ret != -ENOIOCTLCMD))
> + dev_err(vpfe->dev,
> + "stream off failed in subdev\n");
> + vpfe_stop_isif_capture(vpfe);
> + vpfe_detach_irq(vpfe);
> + vb2_queue_release(&vpfe->buffer_queue);
> + vb2_dma_contig_cleanup_ctx(vpfe->alloc_ctx);
> + }
> + vpfe->io_usrs = 0;
> + vpfe->numbuffers = config_params.numbuffers;
> + }
> +
> + /* Decrement device usrs counter */
> + vpfe->usrs--;
> + /* Close the priority */
> + v4l2_prio_close(&vpfe->prio, fh->prio);
> + /* If this is the last file handle */
> + if (!vpfe->usrs) {
> + vpfe->initialized = 0;
> + if (vpfe->vpfe_isif.hw_ops.close)
> + vpfe->vpfe_isif.hw_ops.close(
> + &vpfe->vpfe_isif, vpfe->dev);
> + }
> + mutex_unlock(&vpfe->lock);
> + file->private_data = NULL;
> +
> + /* Free memory allocated to file handle object */
> + kfree(fh);
> +
> + return 0;
> +}
> +
> +/*
> + * vpfe_mmap : It is used to map kernel space buffers into user spaces
> + * @file: file pointer
> + * @vma: ptr to vm_area_struct
> + */
> +static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
> +{
> + /* Get the device object and file handle object */
> + struct vpfe_device *vpfe = video_drvdata(file);
> + int ret;
> +
> + if (mutex_lock_interruptible(&vpfe->lock))
> + return -ERESTARTSYS;
> +
> + ret = vb2_mmap(&vpfe->buffer_queue, vma);
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +/*
> + * vpfe_poll: It is used for select/poll system call
> + * @filep: file pointer
> + * @wait: poll table to wait
> + */
> +static unsigned int vpfe_poll(struct file *file, poll_table *wait)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + int ret = 0;
> +
> + if (vpfe->started) {
> + mutex_lock(&vpfe->lock);
> + ret = vb2_poll(&vpfe->buffer_queue, file, wait);
> + mutex_unlock(&vpfe->lock);
> + }
> +
> + return ret;
> +}
> +
> +/* vpfe capture driver file operations */
> +static const struct v4l2_file_operations vpfe_fops = {
> + .owner = THIS_MODULE,
> + .open = vpfe_open,
> + .release = vpfe_release,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = vpfe_mmap,
> + .poll = vpfe_poll
> +};
> +
> +static int vpfe_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + cap->version = KERNEL_VERSION(3, 17, 0);
> + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
> + | V4L2_CAP_READWRITE;
> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> + strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
> + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
> + "VPFE");
> + strlcpy(cap->card, vpfe->cfg->card_name, sizeof(cap->card));
> +
> + return 0;
> +}
> +
> +/* get the subdev which is connected to the output video node */
> +static struct v4l2_subdev *
> +vpfe_remote_subdev(struct vpfe_device *vpfe, u32 *pad)
> +{
> + struct media_pad *remote = media_entity_remote_pad(&vpfe->pad);
> +
> + if (remote == NULL)
> + return NULL;
> + else if ((remote->entity->type & MEDIA_ENT_T_V4L2_SUBDEV) == 0)
> + return NULL;
> +
> + if (pad)
> + *pad = remote->index;
> +
> + return media_entity_to_v4l2_subdev(remote->entity);
> +}
> +
> +/* get the format set at output pad of the adjacent subdev */
> +static int __vpfe_get_format(struct vpfe_device *vpfe,
> + struct v4l2_format *format, unsigned int *bpp)
> +{
> + struct v4l2_subdev_format fmt;
> + struct v4l2_subdev *subdev;
> + struct media_pad *remote;
> + u32 pad;
> + int ret;
> +
> + subdev = vpfe_remote_subdev(vpfe, &pad);
> + if (subdev == NULL)
> + return -EINVAL;
> +
> + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + remote = media_entity_remote_pad(&vpfe->pad);
> + fmt.pad = remote->index;
> +
> + ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
> + if (ret == -ENOIOCTLCMD)
> + return -EINVAL;
> +
> + format->type = vpfe->fmt.type;
> +
> + /* convert mbus_format to v4l2_format */
> + v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
> + mbus_to_pix(vpfe, &fmt.format, &format->fmt.pix, bpp);
> +
> + return 0;
> +}
> +
> +/* set the format at output pad of the adjacent subdev */
> +static int __vpfe_set_format(struct vpfe_device *vpfe,
> + struct v4l2_format *format, unsigned int *bpp)
> +{
> + struct v4l2_subdev_format fmt;
> + struct v4l2_subdev *subdev;
> + struct media_pad *remote;
> + u32 pad;
> + int ret;
> +
> + subdev = vpfe_remote_subdev(vpfe, &pad);
> + if (subdev == NULL)
> + return -EINVAL;
> +
> + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
> + remote = media_entity_remote_pad(&vpfe->pad);
> + fmt.pad = remote->index;
> +
> + ret = pix_to_mbus(vpfe, &format->fmt.pix, &fmt.format);
> + if (ret)
> + return ret;
> +
> + ret = v4l2_subdev_call(subdev, pad, set_fmt, NULL, &fmt);
> + if (ret == -ENOIOCTLCMD)
> + return -EINVAL;
> +
> + format->type = vpfe->fmt.type;
> +
> + /* convert mbus_format to v4l2_format */
> + v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
> + mbus_to_pix(vpfe, &fmt.format, &format->fmt.pix, bpp);
> +
> + return 0;
> +}
> +
> +static int vpfe_g_fmt(struct file *file, void *priv,
> + struct v4l2_format *fmt)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_format format;
> + unsigned int bpp;
> + int ret = 0;
> +
> + ret = __vpfe_get_format(vpfe, &format, &bpp);
> + if (ret)
> + return ret;
> +
> + /* Fill in the information about format */
> + *fmt = vpfe->fmt;
> + return ret;
> +}
> +
> +static int vpfe_enum_fmt(struct file *file, void *priv,
> + struct v4l2_fmtdesc *fmt)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_mbus_framefmt mbus;
> + struct v4l2_subdev_mbus_code_enum mbus_code;
> + struct v4l2_subdev *subdev;
> + struct media_pad *remote;
> + struct v4l2_pix_format pix;
> + u32 pad, bpp;
> + int ret;
> +
> + subdev = vpfe_remote_subdev(vpfe, &pad);
> + if (subdev == NULL)
> + return -EINVAL;
> +
> + remote = media_entity_remote_pad(&vpfe->pad);
> + mbus_code.index = fmt->index;
> + ret = v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &mbus_code);
> + if (ret)
> + return -EINVAL;
> +
> + mbus.code = mbus_code.code;
> + mbus_to_pix(vpfe, &mbus, &pix, &bpp);
> +
> + /* Should be V4L2_BUF_TYPE_VIDEO_CAPTURE */
> + fmt->type = vpfe->fmt.type;
> + fmt->pixelformat = pix.pixelformat;
> +
> + switch (fmt->pixelformat) {
> + case V4L2_PIX_FMT_UYVY:
> + case V4L2_PIX_FMT_YUYV:
> + case V4L2_PIX_FMT_VYUY:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "YUV 4:2:2");
> + break;
> + case V4L2_PIX_FMT_YVYU:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "YVU 4:2:2");
> + break;
> + case V4L2_PIX_FMT_NV12:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "Y/CbCr 4:2:0");
> + break;
> + case V4L2_PIX_FMT_YUV420:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "YUV 4:2:0");
> + break;
> + case V4L2_PIX_FMT_SBGGR8:
> + case V4L2_PIX_FMT_SGBRG8:
> + case V4L2_PIX_FMT_SGRBG8:
> + case V4L2_PIX_FMT_SRGGB8:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "SRGB-8");
> + break;
> + case V4L2_PIX_FMT_RGB565:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "RGB-16 (5-6-5)");
> + break;
> + case V4L2_PIX_FMT_RGB565X:
> + snprintf(fmt->description, sizeof(fmt->description),
> + "RGB-16 (5-6-5) BE");
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int vpfe_s_fmt(struct file *file, void *priv,
> + struct v4l2_format *fmt)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_format format;
> + unsigned int bpp;
> + int ret = 0;
> +
> + memset(&format, 0x00, sizeof(format));
> +
> + /* If streaming is started, return error */
> + if (vpfe->started) {
> + dev_err(vpfe->dev, "Streaming is started\n");
> + return -EBUSY;
> + }
> +
> + /* Check for valid frame format */
> + ret = __vpfe_get_format(vpfe, &format, &bpp);
> + if (ret)
> + return ret;
> + if (!cmp_v4l2_format(fmt, &format)) {
> + /* Sensor format is different from the requested format
> + * so we need to change it
> + */
> + ret = __vpfe_set_format(vpfe, fmt, &bpp);
> + if (ret)
> + return ret;
> + } else /* Just make sure all of the fields are consistent */
> + *fmt = format;
> +
> + /* store the pixel format in the device object */
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + /* First detach any IRQ if currently attached */
> + vpfe_detach_irq(vpfe);
> + vpfe->fmt = *fmt;
> + vpfe->bpp = bpp;
> +
> + /* Update the crop window based on found values */
> + vpfe->crop.width = fmt->fmt.pix.width;
> + vpfe->crop.height = fmt->fmt.pix.height;
> +
> + /* set image capture parameters in the isif */
> + ret = vpfe_config_isif_image_format(vpfe);
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_try_fmt(struct file *file, void *priv,
> + struct v4l2_format *fmt)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_format format;
> + unsigned int bpp;
> + int ret = 0;
> +
> + memset(&format, 0x00, sizeof(format));
> +
> + ret = __vpfe_get_format(vpfe, &format, &bpp);
> + if (ret)
> + return ret;
> +
> + *fmt = format;
> +
> + return 0;
> +}
> +
> +static int vpfe_enum_size(struct file *file, void *priv,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_mbus_framefmt mbus;
> + struct v4l2_subdev_frame_size_enum fse;
> + struct v4l2_subdev *subdev;
> + struct media_pad *remote;
> + struct v4l2_pix_format pix;
> + u32 pad;
> + int ret;
> +
> + memset(fsize->reserved, 0x00, sizeof(fsize->reserved));
> +
> + subdev = vpfe_remote_subdev(vpfe, &pad);
> + if (subdev == NULL)
> + return -EINVAL;
> +
> + /* Construct pix from parameter and use defualt for the rest */
> + pix.pixelformat = fsize->pixel_format;
> + pix.width = 640;
> + pix.height = 480;
> + pix.colorspace = V4L2_COLORSPACE_JPEG;
> + pix.field = V4L2_FIELD_NONE;
> +
> + ret = pix_to_mbus(vpfe, &pix, &mbus);
> + if (ret)
> + return ret;
> +
> + remote = media_entity_remote_pad(&vpfe->pad);
> + fse.index = fsize->index;
> + fse.pad = remote->index;
> + fse.code = mbus.code;
> +
> + ret = v4l2_subdev_call(subdev, pad, enum_frame_size, NULL, &fse);
> + if (ret)
> + return -EINVAL;
> +
> + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> + fsize->discrete.width = fse.max_width;
> + fsize->discrete.height = fse.max_height;
> +
> + return 0;
> +}
> +
> +/*
> + * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
> + * given app input index
> + */
> +static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe,
> + int *subdev_index,
> + int *subdev_input_index,
> + int app_input_index)
> +{
> + struct vpfe_config *cfg = vpfe->cfg;
> + struct vpfe_subdev_info *sdinfo;
> + int i, j = 0;
> +
> + for (i = 0; i < cfg->num_subdevs; i++) {
> + sdinfo = &cfg->sub_devs[i];
> + if (app_input_index < (j + sdinfo->num_inputs)) {
> + *subdev_index = i;
> + *subdev_input_index = app_input_index - j;
> + return 0;
> + }
> + j += sdinfo->num_inputs;
> + }
> +
> + return -EINVAL;
> +}
> +
> +/*
> + * vpfe_get_app_input - Get app input index for a given subdev input index
> + * driver stores the input index of the current sub device and translate it
> + * when application request the current input
> + */
> +static int vpfe_get_app_input_index(struct vpfe_device *vpfe,
> + int *app_input_index)
> +{
> + struct vpfe_config *cfg = vpfe->cfg;
> + struct vpfe_subdev_info *sdinfo;
> + int i, j = 0;
> +
> + for (i = 0; i < cfg->num_subdevs; i++) {
> + sdinfo = &cfg->sub_devs[i];
> + if (!strcmp(sdinfo->name, vpfe->current_subdev->name)) {
> + if (vpfe->current_input >= sdinfo->num_inputs)
> + return -1;
> + *app_input_index = j + vpfe->current_input;
> + return 0;
> + }
> + j += sdinfo->num_inputs;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int vpfe_enum_input(struct file *file, void *priv,
> + struct v4l2_input *inp)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_subdev_info *sdinfo;
> + int subdev, index;
> +
> + if (vpfe_get_subdev_input_index(vpfe,
> + &subdev, &index,
> + inp->index) < 0)
> + return -EINVAL;
> +
> + sdinfo = &vpfe->cfg->sub_devs[subdev];
> + memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
> +
> + return 0;
> +}
> +
> +static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + return vpfe_get_app_input_index(vpfe, index);
> +}
> +
> +/* Assumes caller is holding vpfe->lock */
> +static int vpfe_set_input(struct vpfe_device *vpfe, unsigned int index)
> +{
> + struct v4l2_subdev *sd;
> + struct vpfe_subdev_info *sdinfo;
> + int subdev_index = 0, inp_index = 0;
> + struct vpfe_route *route;
> + u32 input = 0, output = 0;
> + int ret = -EINVAL;
> +
> + /*
> + * If streaming is started return device busy
> + * error
> + */
> + if (vpfe->started) {
> + dev_err(vpfe->dev, "Streaming is on\n");
> + ret = -EBUSY;
> + goto get_out;
> + }
> + ret = vpfe_get_subdev_input_index(vpfe,
> + &subdev_index, &inp_index, index);
> + if (ret < 0) {
> + dev_err(vpfe->dev, "invalid input index\n");
> + goto get_out;
> + }
> +
> + sdinfo = &vpfe->cfg->sub_devs[subdev_index];
> + sd = vpfe->sd[subdev_index];
> + route = &sdinfo->routes[inp_index];
> + if (route && sdinfo->can_route) {
> + input = route->input;
> + output = route->output;
> + if (sd)
> + ret = v4l2_subdev_call(sd, video,
> + s_routing, input, output, 0);
> +
> + if (ret) {
> + ret = -EINVAL;
> + goto get_out;
> + }
> + }
> +
> + vpfe->current_subdev = sdinfo;
> + vpfe->current_input = index;
> + vpfe->std_index = 0;
> +
> + /* set the bus/interface parameter for the sub device in isif */
> + ret = vpfe->vpfe_isif.hw_ops.set_hw_if_params(
> + &vpfe->vpfe_isif, &sdinfo->isif_if_params);
> + if (ret)
> + goto get_out;
> +
> + /* set the default image parameters in the device */
> + ret = vpfe_config_image_format(vpfe,
> + vpfe_standards[vpfe->std_index].std_id);
> +
> +get_out:
> + return ret;
> +}
> +
> +static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + int ret = -EINVAL;
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + ret = vpfe_set_input(vpfe, index);
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_subdev_info *sdinfo;
> + int ret = 0;
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + sdinfo = vpfe->current_subdev;
> + if (ret)
> + return ret;
> +
> + /* Call querystd function of decoder device */
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
> + video, querystd, std_id);
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_subdev_info *sdinfo;
> + int ret = 0;
> +
> + /* Call decoder driver function to set the standard */
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + sdinfo = vpfe->current_subdev;
> + /* If streaming is started, return device busy error */
> + if (vpfe->started) {
> + dev_err(vpfe->dev, "streaming is started\n");
> + ret = -EBUSY;
> + goto unlock_out;
> + }
> +
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
> + video, s_std, std_id);
> + if (ret < 0) {
> + dev_err(vpfe->dev, "Failed to set standard\n");
> + goto unlock_out;
> + }
> + ret = vpfe_config_image_format(vpfe, std_id);
> +
> +unlock_out:
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + *std_id = vpfe_standards[vpfe->std_index].std_id;
> +
> + return 0;
> +}
> +/*
> + * Videobuf operations
> + */
> +
> +/*
> + * vpfe_buffer_queue_setup : Callback function for buffer setup.
> + * @vq: vb2_queue ptr
> + * @fmt: v4l2 format
> + * @nbuffers: ptr to number of buffers requested by application
> + * @nplanes:: contains number of distinct video planes needed to hold a frame
> + * @sizes[]: contains the size (in bytes) of each plane.
> + * @alloc_ctxs: ptr to allocation context
> + *
> + * This callback function is called when reqbuf() is called to adjust
> + * the buffer count and buffer size
> + */
> +
> +static int vpfe_buffer_queue_setup(struct vb2_queue *vq,
> + const struct v4l2_format *fmt,
> + unsigned int *nbuffers, unsigned int *nplanes,
> + unsigned int sizes[], void *alloc_ctxs[])
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> + struct vpfe_device *vpfe = fh->vpfe;
> + unsigned long size;
> +
> + size = vpfe->fmt.fmt.pix.sizeimage;
> +
> + if (*nbuffers < config_params.min_numbuffers)
> + *nbuffers = config_params.min_numbuffers;
> +
> + *nplanes = 1;
> + sizes[0] = size;
> + alloc_ctxs[0] = vpfe->alloc_ctx;
> +
> + return 0;
> +}
> +
> +/*
> + * vpfe_buffer_prepare : callback function for buffer prepare
> + * @vb: ptr to vb2_buffer
> + *
> + * This is the callback function for buffer prepare when vb2_qbuf()
> + * function is called. The buffer is prepared and user space virtual address
> + * or user address is converted into physical address
> + */
> +static int vpfe_buffer_prepare(struct vb2_buffer *vb)
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
> + struct vpfe_device *vpfe = fh->vpfe;
> + unsigned long addr;
> +
> + /* If buffer is not initialized, initialize it */
> + if (vb->state != VB2_BUF_STATE_ACTIVE &&
> + vb->state != VB2_BUF_STATE_PREPARED) {
> + vb2_set_plane_payload(vb, 0, vpfe->fmt.fmt.pix.sizeimage);
> + if (vb2_plane_vaddr(vb, 0) &&
> + vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
> + goto exit;
> + addr = vb2_dma_contig_plane_dma_addr(vb, 0);
> +
> + /* Make sure user addresses are aligned to 32 bytes */
> + if (!ALIGN(addr, 32))
> + goto exit;
> + }
> +
> + return 0;
> +
> +exit:
> + return -EINVAL;
> +}
> +
> +/*
> + * vpfe_buffer_queue : Callback function to add buffer to DMA queue
> + * @vb: ptr to vb2_buffer
> + */
> +static void vpfe_buffer_queue(struct vb2_buffer *vb)
> +{
> + /* Get the file handle object and device object */
> + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
> + struct vpfe_device *vpfe = fh->vpfe;
> + struct vpfe_cap_buffer *buf = container_of(vb,
> + struct vpfe_cap_buffer, vb);
> + unsigned long flags;
> +
> + /* add the buffer to the DMA queue */
> + spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
> + list_add_tail(&buf->list, &vpfe->dma_queue);
> + spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
> +}
> +
> +/*
> + * vpfe_buffer_cleanup : Callback function to free buffer
> + * @vb: ptr to vb2_buffer
> + *
> + * This function is called from the videobuf2 layer to free memory
> + * allocated to the buffers
> + */
> +static void vpfe_buffer_cleanup(struct vb2_buffer *vb)
> +{
> + /* Get the file handle object and device object */
> + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
> + struct vpfe_device *vpfe = fh->vpfe;
> + struct vpfe_cap_buffer *buf = container_of(vb,
> + struct vpfe_cap_buffer, vb);
> + unsigned long flags;
> +
> + /*
> + * We need to flush the buffer from the dma queue since
> + * they are de-allocated
> + */
> + spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
> +
> + if (vb->state == VB2_BUF_STATE_ACTIVE)
> + list_del_init(&buf->list);
> +
> + spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
> +}
> +
> +static void vpfe_wait_prepare(struct vb2_queue *vq)
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> + struct vpfe_device *vpfe = fh->vpfe;
> +
> + mutex_unlock(&vpfe->lock);
> +}
> +
> +static void vpfe_wait_finish(struct vb2_queue *vq)
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> + struct vpfe_device *vpfe = fh->vpfe;
> +
> + mutex_lock(&vpfe->lock);
> +}
> +
make use of vb2_ops_wait_prepare/finish helper functions.
> +static int vpfe_buffer_init(struct vb2_buffer *vb)
> +{
> + struct vpfe_cap_buffer *buf = container_of(vb,
> + struct vpfe_cap_buffer, vb);
> +
> + INIT_LIST_HEAD(&buf->list);
> +
> + return 0;
> +}
Is this required ?
> +
> +static void vpfe_calculate_offsets(struct vpfe_device *vpfe);
> +static void vpfe_start_isif_capture(struct vpfe_device *vpfe);
> +
> +static int vpfe_start_streaming(struct vb2_queue *vq, unsigned int count)
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> + struct vpfe_device *vpfe = fh->vpfe;
> + unsigned long addr = 0;
> + unsigned long flags;
> + int ret = 0;
> +
> + /* If buffer queue is empty, return error */
> + spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
> + if (list_empty(&vpfe->dma_queue)) {
> + spin_unlock_irqrestore(&vpfe->irqlock, flags);
> + return -EIO;
> + }
> +
> + /* Get the next frame from the buffer queue */
> + vpfe->next_frm = list_entry(vpfe->dma_queue.next,
> + struct vpfe_cap_buffer, list);
> + vpfe->cur_frm = vpfe->next_frm;
> + /* Remove buffer from the buffer queue */
> + list_del(&vpfe->cur_frm->list);
> + spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
> +
> + /* Mark state of the current frame to active */
> + vpfe->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
> + /* Initialize field_id and started member */
> + vpfe->field_id = 0;
> + addr = vb2_dma_contig_plane_dma_addr(&vpfe->cur_frm->vb, 0);
> +
> + /* Calculate field offset */
> + vpfe_calculate_offsets(vpfe);
> +
> + if (vpfe_attach_irq(vpfe) < 0) {
> + dev_err(vpfe->dev,
> + "Error in attaching interrupt handle\n");
> + return -EFAULT;
> + }
> + if (vpfe->vpfe_isif.hw_ops.configure(&vpfe->vpfe_isif) < 0) {
> + dev_err(vpfe->dev,
> + "Error in configuring isif\n");
> + return -EINVAL;
> + }
> +
> + vpfe->vpfe_isif.hw_ops.setfbaddr(
> + &vpfe->vpfe_isif, (unsigned long)(addr));
> + vpfe_start_isif_capture(vpfe);
> +
> + return ret;
> +}
> +
> +/* abort streaming and wait for last buffer */
> +static void vpfe_stop_streaming(struct vb2_queue *vq)
> +{
> + struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> + struct vpfe_device *vpfe = fh->vpfe;
> + unsigned long flags;
> +
> + if (!vb2_is_streaming(vq))
> + return;
> +
> + /* release all active buffers */
> + spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
> +
> + if (vpfe->cur_frm)
> + vb2_buffer_done(&vpfe->cur_frm->vb, VB2_BUF_STATE_DONE);
> +
> + while (!list_empty(&vpfe->dma_queue)) {
> + struct vpfe_cap_buffer *buf;
> +
> + buf = list_first_entry(&vpfe->dma_queue, struct vpfe_cap_buffer,
> + list);
> + list_del(&buf->list);
> + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
> + }
> +
> + spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
> +}
> +
> +static struct vb2_ops video_qops = {
> + .queue_setup = vpfe_buffer_queue_setup,
> + .wait_prepare = vpfe_wait_prepare,
> + .wait_finish = vpfe_wait_finish,
> + .buf_init = vpfe_buffer_init,
> + .buf_prepare = vpfe_buffer_prepare,
> + .start_streaming = vpfe_start_streaming,
> + .stop_streaming = vpfe_stop_streaming,
> + .buf_cleanup = vpfe_buffer_cleanup,
> + .buf_queue = vpfe_buffer_queue,
> +};
> +
> +/*
> + * vpfe_reqbufs() - request buffer handler
> + * @file: file ptr
> + * @priv: file handle
> + * @reqbuf: request buffer structure ptr
> + *
> + * Currently support REQBUF only once opening
> + * the device.
> + */
> +static int vpfe_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *req_buf)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh = file->private_data;
> + struct vb2_queue *q;
> + int ret = 0;
> +
> + if (req_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + dev_err(vpfe->dev, "Invalid buffer type\n");
> + return -EINVAL;
> + }
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + if (vpfe->io_usrs != 0) {
> + dev_err(vpfe->dev, "Only one IO user allowed\n");
> + ret = -EBUSY;
> + goto unlock_out;
> + }
> +
> + /* Initialize videobuf2 queue as per the buffer type */
> + vpfe->alloc_ctx = vb2_dma_contig_init_ctx(vpfe->dev);
> + if (IS_ERR(vpfe->alloc_ctx)) {
> + dev_err(vpfe->dev, "Failed to get the context\n");
> + ret = PTR_ERR(vpfe->alloc_ctx);
> + goto unlock_out;
> + }
> +
> + q = &vpfe->buffer_queue;
> + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + q->io_modes = VB2_MMAP | VB2_USERPTR;
> + q->drv_priv = fh;
> + q->ops = &video_qops;
> + q->mem_ops = &vb2_dma_contig_memops;
> + q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
> + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> +
> + ret = vb2_queue_init(q);
> + if (ret) {
> + dev_err(vpfe->dev, "vb2_queue_init() failed\n");
> + vb2_dma_contig_cleanup_ctx(vpfe->alloc_ctx);
> + goto unlock_out;
> + }
> +
> + /* Set io allowed member of file handle to TRUE */
> + fh->io_allowed = 1;
> + /* Increment io usrs member of channel object to 1 */
> + vpfe->io_usrs = 1;
> + /* Store type of memory requested in channel object */
> + vpfe->memory = req_buf->memory;
> + INIT_LIST_HEAD(&vpfe->dma_queue);
> +
> + /* Allocate buffers */
> + ret = vb2_reqbufs(&vpfe->buffer_queue, req_buf);
> +
> +unlock_out:
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +/*
> + * vpfe_querybuf() - query buffer handler
> + * @file: file ptr
> + * @priv: file handle
> + * @buf: v4l2 buffer structure ptr
> + */
> +static int vpfe_querybuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + dev_dbg(vpfe->dev, "Invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + if (vpfe->memory != V4L2_MEMORY_MMAP) {
> + dev_dbg(vpfe->dev, "Invalid memory\n");
> + return -EINVAL;
> + }
> +
> + return vb2_querybuf(&vpfe->buffer_queue, buf);
> +}
> +
> +/*
> + * vpfe_qbuf() - queue buffer handler
> + * @file: file ptr
> + * @priv: file handle
> + * @buf: v4l2 buffer structure ptr
> + */
> +static int vpfe_qbuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh = file->private_data;
> +
> + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
> + dev_err(vpfe->dev, "Invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * If this file handle is not allowed to do IO,
> + * return error
> + */
> + if (!fh->io_allowed) {
> + dev_err(vpfe->dev, "fh->io_allowed\n");
> + return -EACCES;
> + }
> +
> + return vb2_qbuf(&vpfe->buffer_queue, buf);
> +}
> +
> +/*
> + * vpfe_dqbuf() - dequeue buffer handler
> + * @file: file ptr
> + * @priv: file handle
> + * @buf: v4l2 buffer structure ptr
> + */
> +static int vpfe_dqbuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
> + dev_err(vpfe->dev, "Invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + return vb2_dqbuf(&vpfe->buffer_queue, buf,
> + (file->f_flags & O_NONBLOCK));
> +}
> +
> +/*
> + * vpfe_calculate_offsets : This function calculates buffers offset
> + * for top and bottom field
> + */
> +static void vpfe_calculate_offsets(struct vpfe_device *vpfe)
> +{
> + struct v4l2_rect image_win;
> +
> + vpfe->vpfe_isif.hw_ops.get_image_window(
> + &vpfe->vpfe_isif, &image_win);
> + vpfe->field_off = image_win.height * image_win.width;
> +}
> +
> +/* vpfe_start_isif_capture: start streaming in ccdc/isif */
> +static void vpfe_start_isif_capture(struct vpfe_device *vpfe)
> +{
> + vpfe->vpfe_isif.hw_ops.enable(&vpfe->vpfe_isif, 1);
> + if (vpfe->vpfe_isif.hw_ops.enable_out_to_sdram)
> + vpfe->vpfe_isif.hw_ops.enable_out_to_sdram(
> + &vpfe->vpfe_isif, 1);
> + vpfe->started = 1;
> +}
> +
> +/*
> + * vpfe_streamon() - streamon handler
> + * @file: file ptr
> + * @priv: file handle
> + * @buftype: v4l2 buffer type
> +
> + * Assume the DMA queue is not empty.
> + * application is expected to call QBUF before calling
> + * this ioctl. If not, driver returns error
> + */
> +static int vpfe_streamon(struct file *file, void *priv,
> + enum v4l2_buf_type buf_type)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh = file->private_data;
> + struct vpfe_subdev_info *sdinfo;
> + int ret = 0;
> +
> + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
> + dev_err(vpfe->dev, "Invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + /* If file handle is not allowed IO, return error */
> + if (!fh->io_allowed) {
> + dev_err(vpfe->dev, "fh->io_allowed\n");
> + return -EACCES;
> + }
> +
> + /* If streaming is already started, return error */
> + if (vpfe->started) {
> + dev_err(vpfe->dev, "device started\n");
> + return -EBUSY;
> + }
> +
> + sdinfo = vpfe->current_subdev;
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
> + video, s_stream, 1);
> +
> + if (ret && (ret != -ENOIOCTLCMD)) {
> + dev_err(vpfe->dev, "stream on failed in subdev\n");
> + return -EINVAL;
> + }
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + goto unlock_out;
> +
> + /* Call vb2_streamon to start streaming * in videobuf2 */
> + ret = vb2_streamon(&vpfe->buffer_queue, buf_type);
> + if (ret)
> + goto unlock_out;
> +
> +unlock_out:
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +/*
> + * vpfe_streamoff() - streamoff handler
> + * @file: file ptr
> + * @priv: file handle
> + * @buftype: v4l2 buffer type
> + */
> +static int vpfe_streamoff(struct file *file, void *priv,
> + enum v4l2_buf_type buf_type)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct vpfe_fh *fh = file->private_data;
> + struct vpfe_subdev_info *sdinfo;
> + int ret = 0;
> +
> + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
> + dev_err(vpfe->dev, "Invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + /* If io is allowed for this file handle, return error */
> + if (!fh->io_allowed) {
> + dev_err(vpfe->dev, "fh->io_allowed\n");
> + return -EACCES;
> + }
> +
> + /* If streaming is not started, return error */
> + if (!vpfe->started) {
> + dev_err(vpfe->dev, "device started\n");
> + return -EINVAL;
> + }
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + vpfe_stop_isif_capture(vpfe);
> + vpfe_detach_irq(vpfe);
> +
> + sdinfo = vpfe->current_subdev;
> + ret = v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
> + video, s_stream, 0);
> +
> + if (ret && (ret != -ENOIOCTLCMD))
> + dev_err(vpfe->dev, "stream off failed in subdev\n");
> +
> + ret = vb2_streamoff(&vpfe->buffer_queue, buf_type);
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_cropcap(struct file *file, void *priv,
> + struct v4l2_cropcap *crop)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + if (vpfe->std_index >= ARRAY_SIZE(vpfe_standards))
> + return -EINVAL;
> +
> + memset(crop, 0, sizeof(struct v4l2_cropcap));
> + crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + crop->defrect.width = vpfe_standards[vpfe->std_index].width;
> + crop->bounds.width = crop->defrect.width;
> + crop->defrect.height = vpfe_standards[vpfe->std_index].height;
> + crop->bounds.height = crop->defrect.height;
> + crop->pixelaspect = vpfe_standards[vpfe->std_index].pixelaspect;
> +
> + return 0;
> +}
> +
> +static int vpfe_g_crop(struct file *file, void *priv,
> + struct v4l2_crop *crop)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> +
> + crop->c = vpfe->crop;
> +
> + return 0;
> +}
> +
> +static int vpfe_s_crop(struct file *file, void *priv,
> + const struct v4l2_crop *crop)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + struct v4l2_rect rect = crop->c;
> + int ret = 0;
> +
> + if (vpfe->started) {
> + /* make sure streaming is not started */
> + dev_err(vpfe->dev,
> + "Cannot change crop when streaming is ON\n");
> + return -EBUSY;
> + }
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + if (rect.top < 0 || rect.left < 0) {
> + dev_err(vpfe->dev,
> + "doesn't support negative values for top & left\n");
> + ret = -EINVAL;
> + goto unlock_out;
> + }
> +
> + /* adjust the width to 16 pixel boundary */
> + rect.width = ((rect.width + 15) & ~0xf);
> +
> + /* make sure parameters are valid */
> + if ((rect.left + rect.width >
> + vpfe->std_info.active_pixels) ||
> + (rect.top + rect.height >
> + vpfe->std_info.active_lines)) {
> + dev_err(vpfe->dev, "Error in S_CROP params\n");
> + ret = -EINVAL;
> + goto unlock_out;
> + }
> + vpfe->vpfe_isif.hw_ops.set_image_window(
> + &vpfe->vpfe_isif, &rect, vpfe->bpp);
> + vpfe->fmt.fmt.pix.width = rect.width;
> + vpfe->fmt.fmt.pix.height = rect.height;
> + vpfe->fmt.fmt.pix.bytesperline =
> + vpfe->vpfe_isif.hw_ops.get_line_length(
> + &vpfe->vpfe_isif);
> + vpfe->fmt.fmt.pix.sizeimage =
> + vpfe->fmt.fmt.pix.bytesperline *
> + vpfe->fmt.fmt.pix.height;
> + vpfe->crop = rect;
> +
> +unlock_out:
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +
> +static long vpfe_param_handler(struct file *file, void *priv,
> + bool valid_prio, unsigned int cmd, void *param)
> +{
> + struct vpfe_device *vpfe = video_drvdata(file);
> + int ret = 0;
> +
> + if (vpfe->started)
> + return -EBUSY;
> +
> + ret = mutex_lock_interruptible(&vpfe->lock);
> + if (ret)
> + return ret;
> +
> + switch (cmd) {
> + case VPFE_CMD_S_ISIF_RAW_PARAMS:
> + dev_warn(vpfe->dev,
> + "VPFE_CMD_S_ISIF_RAW_PARAMS: experimental ioctl\n");
> + if (vpfe->vpfe_isif.hw_ops.set_params) {
> + ret = vpfe->vpfe_isif.hw_ops.set_params(
> + &vpfe->vpfe_isif, param);
> + if (ret)
> + goto unlock_out;
> + ret = vpfe_get_isif_image_format(vpfe, &vpfe->fmt);
> + if (ret < 0)
> + goto unlock_out;
> + } else {
> + ret = -EINVAL;
> + }
> + break;
> + default:
> + ret = -ENOTTY;
> + }
> +
> +unlock_out:
> + mutex_unlock(&vpfe->lock);
> +
> + return ret;
> +}
> +
> +static int vpfe_vidioc_g_priority(struct file *file, void *priv,
> + enum v4l2_priority *p)
> +{
> + struct vpfe_fh *fh = file->private_data;
> + struct vpfe_device *vpfe = fh->vpfe;
> +
> + *p = v4l2_prio_max(&vpfe->prio);
> +
> + return 0;
> +}
> +
> +static int vpfe_vidioc_s_priority(struct file *file, void *priv,
> + enum v4l2_priority p)
> +{
> + struct vpfe_fh *fh = file->private_data;
> + struct vpfe_device *vpfe = fh->vpfe;
> +
> + return v4l2_prio_change(&vpfe->prio, &fh->prio, p);
> +}
> +
> +/* vpfe capture ioctl operations */
> +static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
> + .vidioc_querycap = vpfe_querycap,
> + .vidioc_g_priority = vpfe_vidioc_g_priority,
> + .vidioc_s_priority = vpfe_vidioc_s_priority,
> + .vidioc_g_fmt_vid_cap = vpfe_g_fmt,
> + .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt,
> + .vidioc_s_fmt_vid_cap = vpfe_s_fmt,
> + .vidioc_try_fmt_vid_cap = vpfe_try_fmt,
> + .vidioc_enum_framesizes = vpfe_enum_size,
> + .vidioc_enum_input = vpfe_enum_input,
> + .vidioc_g_input = vpfe_g_input,
> + .vidioc_s_input = vpfe_s_input,
> + .vidioc_querystd = vpfe_querystd,
> + .vidioc_s_std = vpfe_s_std,
> + .vidioc_g_std = vpfe_g_std,
> + .vidioc_reqbufs = vpfe_reqbufs,
> + .vidioc_querybuf = vpfe_querybuf,
> + .vidioc_qbuf = vpfe_qbuf,
> + .vidioc_dqbuf = vpfe_dqbuf,
> + .vidioc_streamon = vpfe_streamon,
> + .vidioc_streamoff = vpfe_streamoff,
> + .vidioc_cropcap = vpfe_cropcap,
> + .vidioc_g_crop = vpfe_g_crop,
> + .vidioc_s_crop = vpfe_s_crop,
> + .vidioc_default = vpfe_param_handler,
> +};
> +
use vb2 helpers.
> +static int vpfe_async_bound(struct v4l2_async_notifier *notifier,
> + struct v4l2_subdev *subdev,
> + struct v4l2_async_subdev *asd)
> +{
> + int i, j;
> + struct vpfe_subdev_info *sdinfo;
> + struct vpfe_device *vpfe = container_of(notifier->v4l2_dev,
> + struct vpfe_device, v4l2_dev);
> +
> + for (i = 0; i < vpfe->cfg->num_subdevs; i++) {
> + sdinfo = &vpfe->cfg->sub_devs[i];
> +
> + if (!strcmp(sdinfo->name, subdev->name)) {
> + vpfe->sd[i] = subdev;
> + dev_info(vpfe->dev,
> + "v4l2 sub device %s registered\n",
> + subdev->name);
> + vpfe->sd[i]->grp_id =
> + sdinfo->grp_id;
> + /* update tvnorms from the sub devices */
> + for (j = 0;
> + j < sdinfo->num_inputs;
> + j++) {
> + vpfe->video_dev->tvnorms |=
> + sdinfo->inputs[j].std;
> + }
> + return 0;
> + }
> + }
> +
> + dev_warn(vpfe->dev, "vpfe_async_bound sub device (%s) not matched\n",
> + subdev->name);
> +
> + return -EINVAL;
> +}
> +
> +static int vpfe_probe_complete(struct vpfe_device *vpfe)
> +{
> + int err;
> + unsigned int flags;
> +
> + spin_lock_init(&vpfe->irqlock);
> + spin_lock_init(&vpfe->dma_queue_lock);
> + mutex_init(&vpfe->lock);
> +
> + /* Initialize field of the device objects */
> + vpfe->numbuffers = config_params.numbuffers;
> +
> + /* Initialize prio member of device object */
> + v4l2_prio_init(&vpfe->prio);
> +
> + vpfe->pad.flags = MEDIA_PAD_FL_SINK;
> + err = media_entity_init(&vpfe->video_dev->entity,
> + 1, &vpfe->pad, 0);
> + if (err < 0)
> + return err;
> +
> + /* set video driver private data */
> + video_set_drvdata(vpfe->video_dev, vpfe);
> + vpfe->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> +
> + dev_info(vpfe->dev, "%s capture driver initialized\n",
> + vpfe->cfg->card_name);
> +
> + /* set first sub device as current one */
> + vpfe->current_subdev = &vpfe->cfg->sub_devs[0];
> +
> + /* select input 0 */
> + err = vpfe_set_input(vpfe, 0);
> + if (err)
> + goto probe_out;
> +
> + /* connect subdev to video node */
> + dev_err(vpfe->dev, "sd[0]->entity is %x\n",
> + (unsigned int)&vpfe->sd[0]->entity);
> + dev_err(vpfe->dev, "video_dev->entity is %x\n",
> + (unsigned int)&vpfe->video_dev->entity);
> +
> + dev_err(vpfe->dev, "source_pad:%d source->num_pads:%d\n",
> + 0, vpfe->sd[0]->entity.num_pads);
> + dev_err(vpfe->dev, "sink_pad:%d sink->num_pads:%d\n",
> + 0, vpfe->video_dev->entity.num_pads);
> +
> + flags = MEDIA_LNK_FL_ENABLED;
> + err = media_entity_create_link(&vpfe->sd[0]->entity, 0,
> + &vpfe->video_dev->entity,
> + 0, flags);
> + if (err < 0)
> + goto probe_out;
> +
> + err = v4l2_device_register_subdev_nodes(&vpfe->v4l2_dev);
> + if (err < 0)
> + goto probe_out;
> +
> + err = video_register_device(vpfe->video_dev,
> + VFL_TYPE_GRABBER, -1);
> + if (err) {
> + dev_err(vpfe->dev,
> + "Unable to register video device.\n");
> + goto probe_out;
> + }
> + dev_info(vpfe->dev, "video device registered as %s\n",
> + video_device_node_name(vpfe->video_dev));
> +
> + return 0;
> +
> +probe_out:
> + v4l2_device_unregister(&vpfe->v4l2_dev);
> +
> + return err;
> +}
> +
> +static int vpfe_async_complete(struct v4l2_async_notifier *notifier)
> +{
> + struct vpfe_device *vpfe = container_of(notifier->v4l2_dev,
> + struct vpfe_device, v4l2_dev);
> + return vpfe_probe_complete(vpfe);
> +}
> +
> +static struct vpfe_config *
> +vpfe_get_pdata(struct platform_device *pdev)
> +{
> + struct vpfe_config *pdata;
> + struct device_node *endpoint, *rem;
> + struct vpfe_subdev_info *sdinfo;
> + const char *instance_name;
> +
> + if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
> + return pdev->dev.platform_data;
> +
> + /* the hwmods property basically provides us with the instance
> + * name and number. So use instead of creating some other means
> + */
> + of_property_read_string(pdev->dev.of_node, "ti,hwmods", &instance_name);
> +
> + endpoint = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
> + if (!endpoint)
> + return NULL;
> +
> + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> + if (!pdata)
> + goto done;
> +
> + /* Populate vpfe_config with default if needed */
> + pdata->card_name = (char *)instance_name;
> + pdata->isif = "AM437x ISIF";
> +
> + /* We only support one sub_devive per port */
> + /* Will need cleanup */
> + pdata->num_subdevs = 1;
> + sdinfo = &pdata->sub_devs[0];
> + sdinfo->grp_id = 0;
> +
> + /* There is only one input on the camera */
> + sdinfo->num_inputs = 1;
> + sdinfo->inputs[0].index = 0;
> + strcpy(sdinfo->inputs[0].name, "camera");
> + sdinfo->inputs[0].type = V4L2_INPUT_TYPE_CAMERA;
> + sdinfo->inputs[0].std = V4L2_STD_ALL;
> + sdinfo->inputs[0].capabilities = V4L2_IN_CAP_STD;
> +
> + sdinfo->can_route = 0;
> + sdinfo->routes = NULL;
> +
> + of_property_read_u32(endpoint, "if_type",
> + &sdinfo->isif_if_params.if_type);
> + if (sdinfo->isif_if_params.if_type < 0)
> + sdinfo->isif_if_params.if_type = VPFE_RAW_BAYER;
> + of_property_read_u32(endpoint, "bus_width",
> + &sdinfo->isif_if_params.bus_width);
> + if (sdinfo->isif_if_params.bus_width != 10)
> + sdinfo->isif_if_params.bus_width = 8;
> + of_property_read_u32(endpoint, "hdpol",
> + &sdinfo->isif_if_params.hdpol);
> + if (sdinfo->isif_if_params.hdpol != 0)
> + sdinfo->isif_if_params.hdpol = 1;
> + of_property_read_u32(endpoint, "vdpol",
> + &sdinfo->isif_if_params.vdpol);
> + if (sdinfo->isif_if_params.vdpol != 0)
> + sdinfo->isif_if_params.vdpol = 1;
> +
> + rem = of_graph_get_remote_port_parent(endpoint);
> + if (rem == NULL) {
> + dev_err(&pdev->dev, "Remote device at %s not found\n",
> + endpoint->full_name);
> + goto done;
> + } else {
> + strncpy(sdinfo->name, rem->name, sizeof(sdinfo->name));
> + }
> +
> + sdinfo->asd.match_type = V4L2_ASYNC_MATCH_OF;
> + sdinfo->asd.match.of.node = rem;
> + pdata->asd[0] = &sdinfo->asd;
> + pdata->asd_sizes = 1;
> + of_node_put(rem);
> +
> +done:
> + of_node_put(endpoint);
> +
> + return pdata;
> +}
> +
> +static int vpfe_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct vpfe_subdev_info *sdinfo;
> + struct vpfe_config *vpfe_cfg;
> + struct vpfe_device *vpfe;
> + struct i2c_adapter *i2c_adap;
> + struct video_device *vfd;
> + int ret = -ENOMEM, i, j;
> + int num_subdevs = 0;
> +
> + /* Default number of buffers should be 3 */
> + if ((numbuffers > 0) &&
> + (numbuffers < config_params.min_numbuffers))
> + numbuffers = config_params.min_numbuffers;
> +
> + config_params.numbuffers = numbuffers;
> +
> + vpfe = devm_kzalloc(dev, sizeof(*vpfe), GFP_KERNEL);
> + if (!vpfe)
> + return -ENOMEM;
> +
> + vpfe->sd = devm_kmalloc_array(dev, num_subdevs,
> + sizeof(struct v4l2_subdev), GFP_KERNEL);
> + if (!vpfe->sd)
> + return -ENOMEM;
> +
> + vpfe->dev = dev;
> +
> + vpfe_cfg = vpfe_get_pdata(pdev);
> + if (!vpfe_cfg) {
> + dev_err(dev, "Unable to get vpfe config\n");
> + return -ENODEV;
> + }
> +
> + vpfe->cfg = vpfe_cfg;
> + if (!vpfe_cfg->isif ||
> + !vpfe_cfg->card_name ||
> + !vpfe_cfg->sub_devs) {
> + dev_err(dev, "null ptr in vpfe_cfg\n");
> + return -ENOENT;
> + }
> +
> + vpfe->isif_irq0 = platform_get_irq(pdev, 0);
> + if (vpfe->isif_irq0 < 0) {
> + dev_err(vpfe->dev,
> + "Unable to get interrupt for VINT0\n");
> + return -ENODEV;
> + }
> +
> + ret = devm_request_irq(dev, vpfe->isif_irq0, vpfe_isr, 0,
> + "vpfe_capture0", vpfe);
> + if (ret != 0) {
> + dev_err(vpfe->dev, "Unable to request interrupt\n");
> + return ret;
> + }
> +
> + /* Allocate memory for video device */
> + vfd = video_device_alloc();
> + if (!vfd)
> + return -ENOMEM;
> +
> + /* Initialize field of video device */
> + vfd->release = video_device_release;
> + vfd->fops = &vpfe_fops;
> + vfd->ioctl_ops = &vpfe_ioctl_ops;
> + vfd->tvnorms = 0;
> + vfd->v4l2_dev = &vpfe->v4l2_dev;
> +
> + snprintf(vfd->name, sizeof(vfd->name),
> + "%s_V%d.%d.%d",
> + CAPTURE_DRV_NAME,
> + (VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
> + (VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
> + (VPFE_CAPTURE_VERSION_CODE) & 0xff);
> +
> + vpfe->video_dev = vfd;
> + vpfe->media_dev.dev = vpfe->dev;
> +
> + strcpy((char *)&vpfe->media_dev.model, "ti-vpfe-media");
> +
> + ret = media_device_register(&vpfe->media_dev);
> + if (ret) {
> + dev_err(vpfe->dev,
> + "Unable to register media device.\n");
> + goto probe_out_video_release;
> + }
> +
> + vpfe->v4l2_dev.mdev = &vpfe->media_dev;
> +
> + ret = v4l2_device_register(&pdev->dev, &vpfe->v4l2_dev);
> + if (ret) {
> + dev_err(vpfe->dev,
> + "Unable to register v4l2 device.\n");
> + goto probe_out_media_unregister;
> + }
> +
> + ret = vpfe_isif_init(&vpfe->vpfe_isif, pdev);
> + if (ret) {
> + dev_err(vpfe->dev, "Error initializing isif\n");
> + ret = -EINVAL;
> + goto probe_out_v4l2_unregister;
> + }
> +
> + num_subdevs = vpfe_cfg->num_subdevs;
> + if (vpfe->cfg->asd_sizes == 0) {
> + i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
> +
> + for (i = 0; i < num_subdevs; i++) {
> + struct v4l2_input *inps;
> +
> + sdinfo = &vpfe_cfg->sub_devs[i];
> +
> + /* Load up the subdevice */
> + vpfe->sd[i] =
> + v4l2_i2c_new_subdev_board(&vpfe->v4l2_dev,
> + i2c_adap,
> + &sdinfo->board_info,
> + NULL);
> + if (vpfe->sd[i]) {
> + dev_info(vpfe->dev,
> + "v4l2 sub device %s registered\n",
> + sdinfo->name);
> + vpfe->sd[i]->grp_id = sdinfo->grp_id;
> + /* update tvnorms from the sub devices */
> + for (j = 0; j < sdinfo->num_inputs; j++) {
> + inps = &sdinfo->inputs[j];
> + vfd->tvnorms |= inps->std;
> + }
> + } else {
> + dev_err(vpfe->dev,
> + "v4l2 sub device %s register fails\n",
> + sdinfo->name);
> + goto probe_out_v4l2_unregister;
> + }
> + }
> + vpfe_probe_complete(vpfe);
> +
> + } else {
> + vpfe->notifier.subdevs = vpfe->cfg->asd;
> + vpfe->notifier.num_subdevs = vpfe->cfg->asd_sizes;
> + vpfe->notifier.bound = vpfe_async_bound;
> + vpfe->notifier.complete = vpfe_async_complete;
> + ret = v4l2_async_notifier_register(&vpfe->v4l2_dev,
> + &vpfe->notifier);
> + if (ret) {
> + dev_err(vpfe->dev, "Error registering async notifier\n");
> + ret = -EINVAL;
> + goto probe_out_v4l2_unregister;
> + }
> + }
> +
> + return 0;
> +
> +probe_out_v4l2_unregister:
> + v4l2_device_unregister(&vpfe->v4l2_dev);
> +
> +probe_out_media_unregister:
> + media_device_unregister(&vpfe->media_dev);
> +
> +probe_out_video_release:
> + if (!video_is_registered(vpfe->video_dev))
> + video_device_release(vpfe->video_dev);
> +
> + return ret;
> +}
> +
> +/*
> + * vpfe_remove : It un-register device from V4L2 driver
> + */
> +static int vpfe_remove(struct platform_device *pdev)
> +{
> + struct vpfe_device *vpfe = platform_get_drvdata(pdev);
> +
> + isif_remove(&vpfe->vpfe_isif, pdev);
> + v4l2_async_notifier_unregister(&vpfe->notifier);
> + v4l2_device_unregister(&vpfe->v4l2_dev);
> + media_device_unregister(&vpfe->media_dev);
> + video_unregister_device(vpfe->video_dev);
> +
> + return 0;
> +}
> +
> +static int vpfe_suspend(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct vpfe_device *vpfe = platform_get_drvdata(pdev);
> +
> + isif_suspend(&vpfe->vpfe_isif, dev);
> + pinctrl_pm_select_sleep_state(dev);
> +
> + return 0;
> +}
> +
> +static int vpfe_resume(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct vpfe_device *vpfe = platform_get_drvdata(pdev);
> +
> + isif_resume(&vpfe->vpfe_isif, dev);
> + pinctrl_pm_select_default_state(dev);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops vpfe_dev_pm_ops = {
> + .suspend = vpfe_suspend,
> + .resume = vpfe_resume,
> +};
> +
> +static const struct of_device_id vpfe_of_match[] = {
> + { .compatible = "ti,am437x-vpfe", },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, vpfe_of_match);
> +
> +static struct platform_driver vpfe_driver = {
> + .driver = {
> + .name = CAPTURE_DRV_NAME,
> + .owner = THIS_MODULE,
> + .pm = &vpfe_dev_pm_ops,
> + .of_match_table = vpfe_of_match,
> + },
> + .probe = vpfe_probe,
> + .remove = vpfe_remove,
> +};
> +
> +module_platform_driver(vpfe_driver);
> diff --git a/drivers/media/platform/ti-vpfe/vpfe_capture.h b/drivers/media/platform/ti-vpfe/vpfe_capture.h
> new file mode 100644
> index 0000000..91be779
> --- /dev/null
> +++ b/drivers/media/platform/ti-vpfe/vpfe_capture.h
> @@ -0,0 +1,263 @@
> +/*
> + * TI VPFE Multi instance Capture Driver
> + *
> + * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
> + *
> + * Benoit Parrot <bparrot@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef _VPFE_CAPTURE_H
> +#define _VPFE_CAPTURE_H
> +
> +#ifdef __KERNEL__
> +
> +/* Header files */
> +#include <media/v4l2-dev.h>
> +#include <linux/videodev2.h>
> +#include <linux/clk.h>
> +#include <linux/i2c.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-device.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +enum vpfe_pin_pol {
> + VPFE_PINPOL_POSITIVE,
> + VPFE_PINPOL_NEGATIVE
> +};
> +
> +enum vpfe_hw_if_type {
> + /* BT656 - 8 bit */
> + VPFE_BT656,
> + /* BT1120 - 16 bit */
> + VPFE_BT1120,
> + /* Raw Bayer */
> + VPFE_RAW_BAYER,
> + /* YCbCr - 8 bit with external sync */
> + VPFE_YCBCR_SYNC_8,
> + /* YCbCr - 16 bit with external sync */
> + VPFE_YCBCR_SYNC_16,
> + /* BT656 - 10 bit */
> + VPFE_BT656_10BIT
> +};
> +
> +/* interface description */
> +struct vpfe_hw_if_param {
> + enum vpfe_hw_if_type if_type;
> + enum vpfe_pin_pol hdpol;
> + enum vpfe_pin_pol vdpol;
> + unsigned int bus_width;
> +};
> +
> +#include "am437x_isif.h"
> +
> +#define VPFE_CAPTURE_NUM_DECODERS 5
> +
> +/* Macros */
> +#define VPFE_MAJOR_RELEASE 0
> +#define VPFE_MINOR_RELEASE 0
> +#define VPFE_BUILD 1
> +#define VPFE_CAPTURE_VERSION_CODE ((VPFE_MAJOR_RELEASE << 16) | \
> + (VPFE_MINOR_RELEASE << 8) | \
> + VPFE_BUILD)
> +
> +#define CAPTURE_DRV_NAME "vpfe-capture"
> +#define VPFE_MAX_SUBDEV 2
> +#define VPFE_MAX_INPUTS 2
> +
> +struct vpfe_pixel_format {
> + struct v4l2_fmtdesc fmtdesc;
> + /* bytes per pixel */
> + int bpp;
> +};
> +
> +struct vpfe_std_info {
> + int active_pixels;
> + int active_lines;
> + /* current frame format */
> + int frame_format;
> +};
> +
> +struct vpfe_route {
> + u32 input;
> + u32 output;
> +};
> +
> +struct vpfe_subdev_info {
> + /* Sub device name */
> + char name[32];
> + /* Sub device group id */
> + int grp_id;
> + /* Number of inputs supported */
> + int num_inputs;
> + /* inputs available at the sub device */
> + struct v4l2_input inputs[VPFE_MAX_INPUTS];
> + /* Sub dev routing information for each input */
> + struct vpfe_route *routes;
> + /* check if sub dev supports routing */
> + int can_route;
> + /* isif bus/interface configuration */
> + struct vpfe_hw_if_param isif_if_params;
> + /* i2c subdevice board info */
> + struct i2c_board_info board_info;
> + struct v4l2_async_subdev asd;
> +};
> +
> +struct vpfe_config {
> + /* Number of sub devices connected to vpfe */
> + int num_subdevs;
> + /* i2c bus adapter no */
> + int i2c_adapter_id;
> + /* information about each subdev */
> + struct vpfe_subdev_info sub_devs[VPFE_MAX_SUBDEV];
> + /* evm card info */
> + char *card_name;
> + /* isif name */
> + char *isif;
> + /* vpfe clock */
> + struct clk *vpssclk;
> + struct clk *slaveclk;
> + /* Function for Clearing the interrupt */
> + void (*clr_intr)(int vdint);
> + /* Flat array, arranged in groups */
> + struct v4l2_async_subdev *asd[VPFE_MAX_SUBDEV];
> + int asd_sizes;
> +};
> +
> +struct vpfe_cap_buffer {
> + struct vb2_buffer vb;
> + struct list_head list;
> +};
> +
> +struct vpfe_device {
> + /* V4l2 specific parameters */
> + /* Identifies video device for this channel */
> + struct video_device *video_dev;
> + /* media pad of video entity */
> + struct media_pad pad;
> + /* sub devices */
> + struct v4l2_subdev **sd;
> + /* vpfe cfg */
> + struct vpfe_config *cfg;
> + /* V4l2 device */
> + struct v4l2_device v4l2_dev;
> + /* parent device */
> + struct device *dev;
> + /* Subdevive Async Notifier */
> + struct v4l2_async_notifier notifier;
> + /* Used to keep track of state of the priority */
> + struct v4l2_prio_state prio;
> + /* number of open instances of the channel */
> + u32 usrs;
> + /* Indicates id of the field which is being displayed */
> + u32 field_id;
> + /* flag to indicate whether decoder is initialized */
> + u8 initialized;
> + /* current interface type */
> + struct vpfe_hw_if_param vpfe_if_params;
> + /* ptr to currently selected sub device */
> + struct vpfe_subdev_info *current_subdev;
> + /* current input at the sub device */
> + int current_input;
> + /* Keeps track of the information about the standard */
> + struct vpfe_std_info std_info;
> + /* std index into std table */
> + int std_index;
> + /* IRQs used when CCDC/ISIF output to SDRAM */
> + unsigned int isif_irq0;
> + unsigned int isif_irq1;
> + /* number of buffers in fbuffers */
> + u32 numbuffers;
> + /* List of buffer pointers for storing frames */
> + u8 *fbuffers[VIDEO_MAX_FRAME];
> + /* Pointer pointing to current v4l2_buffer */
> + struct vpfe_cap_buffer *cur_frm;
> + /* Pointer pointing to next v4l2_buffer */
> + struct vpfe_cap_buffer *next_frm;
> + /*
> + * This field keeps track of type of buffer exchange mechanism
> + * user has selected
> + */
> + enum v4l2_memory memory;
> + /* Used to store pixel format */
> + struct v4l2_format fmt;
> + /* Used to store current bytes per pixel based on current format */
> + unsigned int bpp;
> + /*
> + * used when IMP is chained to store the crop window which
> + * is different from the image window
> + */
> + struct v4l2_rect crop;
> + /* Buffer queue used in video-buf */
> + struct vb2_queue buffer_queue;
> + /* Allocator-specific contexts for each plane */
> + struct vb2_alloc_ctx *alloc_ctx;
> + /* Queue of filled frames */
> + struct list_head dma_queue;
> + /* Used in video-buf */
> + spinlock_t irqlock;
> + /* IRQ lock for DMA queue */
> + spinlock_t dma_queue_lock;
> + /* lock used to access this structure */
> + struct mutex lock;
> + /* number of users performing IO */
> + u32 io_usrs;
> + /* Indicates whether streaming started */
> + u8 started;
> + /*
> + * offset where second field starts from the starting of the
> + * buffer for field separated YCbCr formats
> + */
> + u32 field_off;
> + /* media device */
> + struct media_device media_dev;
> + /* isif sub device */
> + struct vpfe_isif_device vpfe_isif;
> +};
> +
> +/* File handle structure */
> +struct vpfe_fh {
> + struct vpfe_device *vpfe;
> + /* Indicates whether this file handle is doing IO */
> + u8 io_allowed;
> + /* Used to keep track priority of this instance */
> + enum v4l2_priority prio;
> +};
> +
> +struct vpfe_config_params {
> + u8 min_numbuffers;
> + u8 numbuffers;
> + u32 min_bufsize;
> + u32 device_bufsize;
> +};
> +
> +struct vpfe_v4l2_subdev {
> + struct list_head list; /* internal use only */
> + struct i2c_client *client;
> + void *priv;
> + struct device_node *node;
> +};
> +
> +void vpfe_register_subdev(struct vpfe_v4l2_subdev *subdev);
> +void vpfe_unregister_subdev(struct vpfe_v4l2_subdev *subdev);
> +
> +#endif /* End of __KERNEL__ */
> +/**
> + * VPFE_CMD_S_ISIF_RAW_PARAMS - EXPERIMENTAL IOCTL to set raw capture params
> + * This can be used to configure modules such as defect pixel correction,
> + * color space conversion, culling etc. This is an experimental ioctl that
> + * will change in future kernels. So use this ioctl with care !
> + * TODO: This is to be split into multiple ioctls and also explore the
> + * possibility of extending the v4l2 api to include this
> + **/
> +#define VPFE_CMD_S_ISIF_RAW_PARAMS _IOW('V', BASE_VIDIOC_PRIVATE + 1, \
> + void *)
> +#endif /* _VPFE_CAPTURE_H */
Regards,
--Prabhakar Lad
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