+++ /dev/null
-/*
- * V4L2 Driver for i.MX27 camera host
- *
- * Copyright (C) 2008, Sascha Hauer, Pengutronix
- * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography
- * Copyright (C) 2012, Javier Martin, Vista Silicon S.L.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/dma-mapping.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/gcd.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/math64.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/time.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-
-#include <media/v4l2-common.h>
-#include <media/v4l2-dev.h>
-#include <media/videobuf2-v4l2.h>
-#include <media/videobuf2-dma-contig.h>
-#include <media/soc_camera.h>
-#include <media/drv-intf/soc_mediabus.h>
-
-#include <linux/videodev2.h>
-
-#include <linux/platform_data/media/camera-mx2.h>
-
-#include <asm/dma.h>
-
-#define MX2_CAM_DRV_NAME "mx2-camera"
-#define MX2_CAM_VERSION "0.0.6"
-#define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera"
-
-/* reset values */
-#define CSICR1_RESET_VAL 0x40000800
-#define CSICR2_RESET_VAL 0x0
-#define CSICR3_RESET_VAL 0x0
-
-/* csi control reg 1 */
-#define CSICR1_SWAP16_EN (1 << 31)
-#define CSICR1_EXT_VSYNC (1 << 30)
-#define CSICR1_EOF_INTEN (1 << 29)
-#define CSICR1_PRP_IF_EN (1 << 28)
-#define CSICR1_CCIR_MODE (1 << 27)
-#define CSICR1_COF_INTEN (1 << 26)
-#define CSICR1_SF_OR_INTEN (1 << 25)
-#define CSICR1_RF_OR_INTEN (1 << 24)
-#define CSICR1_STATFF_LEVEL (3 << 22)
-#define CSICR1_STATFF_INTEN (1 << 21)
-#define CSICR1_RXFF_LEVEL(l) (((l) & 3) << 19)
-#define CSICR1_RXFF_INTEN (1 << 18)
-#define CSICR1_SOF_POL (1 << 17)
-#define CSICR1_SOF_INTEN (1 << 16)
-#define CSICR1_MCLKDIV(d) (((d) & 0xF) << 12)
-#define CSICR1_HSYNC_POL (1 << 11)
-#define CSICR1_CCIR_EN (1 << 10)
-#define CSICR1_MCLKEN (1 << 9)
-#define CSICR1_FCC (1 << 8)
-#define CSICR1_PACK_DIR (1 << 7)
-#define CSICR1_CLR_STATFIFO (1 << 6)
-#define CSICR1_CLR_RXFIFO (1 << 5)
-#define CSICR1_GCLK_MODE (1 << 4)
-#define CSICR1_INV_DATA (1 << 3)
-#define CSICR1_INV_PCLK (1 << 2)
-#define CSICR1_REDGE (1 << 1)
-#define CSICR1_FMT_MASK (CSICR1_PACK_DIR | CSICR1_SWAP16_EN)
-
-#define SHIFT_STATFF_LEVEL 22
-#define SHIFT_RXFF_LEVEL 19
-#define SHIFT_MCLKDIV 12
-
-#define SHIFT_FRMCNT 16
-
-#define CSICR1 0x00
-#define CSICR2 0x04
-#define CSISR 0x08
-#define CSISTATFIFO 0x0c
-#define CSIRFIFO 0x10
-#define CSIRXCNT 0x14
-#define CSICR3 0x1c
-#define CSIDMASA_STATFIFO 0x20
-#define CSIDMATA_STATFIFO 0x24
-#define CSIDMASA_FB1 0x28
-#define CSIDMASA_FB2 0x2c
-#define CSIFBUF_PARA 0x30
-#define CSIIMAG_PARA 0x34
-
-/* EMMA PrP */
-#define PRP_CNTL 0x00
-#define PRP_INTR_CNTL 0x04
-#define PRP_INTRSTATUS 0x08
-#define PRP_SOURCE_Y_PTR 0x0c
-#define PRP_SOURCE_CB_PTR 0x10
-#define PRP_SOURCE_CR_PTR 0x14
-#define PRP_DEST_RGB1_PTR 0x18
-#define PRP_DEST_RGB2_PTR 0x1c
-#define PRP_DEST_Y_PTR 0x20
-#define PRP_DEST_CB_PTR 0x24
-#define PRP_DEST_CR_PTR 0x28
-#define PRP_SRC_FRAME_SIZE 0x2c
-#define PRP_DEST_CH1_LINE_STRIDE 0x30
-#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
-#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
-#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
-#define PRP_CH2_OUT_IMAGE_SIZE 0x40
-#define PRP_SRC_LINE_STRIDE 0x44
-#define PRP_CSC_COEF_012 0x48
-#define PRP_CSC_COEF_345 0x4c
-#define PRP_CSC_COEF_678 0x50
-#define PRP_CH1_RZ_HORI_COEF1 0x54
-#define PRP_CH1_RZ_HORI_COEF2 0x58
-#define PRP_CH1_RZ_HORI_VALID 0x5c
-#define PRP_CH1_RZ_VERT_COEF1 0x60
-#define PRP_CH1_RZ_VERT_COEF2 0x64
-#define PRP_CH1_RZ_VERT_VALID 0x68
-#define PRP_CH2_RZ_HORI_COEF1 0x6c
-#define PRP_CH2_RZ_HORI_COEF2 0x70
-#define PRP_CH2_RZ_HORI_VALID 0x74
-#define PRP_CH2_RZ_VERT_COEF1 0x78
-#define PRP_CH2_RZ_VERT_COEF2 0x7c
-#define PRP_CH2_RZ_VERT_VALID 0x80
-
-#define PRP_CNTL_CH1EN (1 << 0)
-#define PRP_CNTL_CH2EN (1 << 1)
-#define PRP_CNTL_CSIEN (1 << 2)
-#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
-#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
-#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
-#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
-#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
-#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
-#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
-#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
-#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
-#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
-#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
-#define PRP_CNTL_CH1_LEN (1 << 9)
-#define PRP_CNTL_CH2_LEN (1 << 10)
-#define PRP_CNTL_SKIP_FRAME (1 << 11)
-#define PRP_CNTL_SWRST (1 << 12)
-#define PRP_CNTL_CLKEN (1 << 13)
-#define PRP_CNTL_WEN (1 << 14)
-#define PRP_CNTL_CH1BYP (1 << 15)
-#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
-#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
-#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
-#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
-#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
-#define PRP_CNTL_CH2B1EN (1 << 29)
-#define PRP_CNTL_CH2B2EN (1 << 30)
-#define PRP_CNTL_CH2FEN (1 << 31)
-
-/* IRQ Enable and status register */
-#define PRP_INTR_RDERR (1 << 0)
-#define PRP_INTR_CH1WERR (1 << 1)
-#define PRP_INTR_CH2WERR (1 << 2)
-#define PRP_INTR_CH1FC (1 << 3)
-#define PRP_INTR_CH2FC (1 << 5)
-#define PRP_INTR_LBOVF (1 << 7)
-#define PRP_INTR_CH2OVF (1 << 8)
-
-/* Resizing registers */
-#define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24)
-#define PRP_RZ_VALID_BILINEAR (1 << 31)
-
-#define MAX_VIDEO_MEM 16
-
-#define RESIZE_NUM_MIN 1
-#define RESIZE_NUM_MAX 20
-#define BC_COEF 3
-#define SZ_COEF (1 << BC_COEF)
-
-#define RESIZE_DIR_H 0
-#define RESIZE_DIR_V 1
-
-#define RESIZE_ALGO_BILINEAR 0
-#define RESIZE_ALGO_AVERAGING 1
-
-struct mx2_prp_cfg {
- int channel;
- u32 in_fmt;
- u32 out_fmt;
- u32 src_pixel;
- u32 ch1_pixel;
- u32 irq_flags;
- u32 csicr1;
-};
-
-/* prp resizing parameters */
-struct emma_prp_resize {
- int algo; /* type of algorithm used */
- int len; /* number of coefficients */
- unsigned char s[RESIZE_NUM_MAX]; /* table of coefficients */
-};
-
-/* prp configuration for a client-host fmt pair */
-struct mx2_fmt_cfg {
- u32 in_fmt;
- u32 out_fmt;
- struct mx2_prp_cfg cfg;
-};
-
-struct mx2_buf_internal {
- struct list_head queue;
- int bufnum;
- bool discard;
-};
-
-/* buffer for one video frame */
-struct mx2_buffer {
- /* common v4l buffer stuff -- must be first */
- struct vb2_v4l2_buffer vb;
- struct mx2_buf_internal internal;
-};
-
-enum mx2_camera_type {
- IMX27_CAMERA,
-};
-
-struct mx2_camera_dev {
- struct device *dev;
- struct soc_camera_host soc_host;
- struct clk *clk_emma_ahb, *clk_emma_ipg;
- struct clk *clk_csi_ahb, *clk_csi_per;
-
- void __iomem *base_csi, *base_emma;
-
- struct mx2_camera_platform_data *pdata;
- unsigned long platform_flags;
-
- struct list_head capture;
- struct list_head active_bufs;
- struct list_head discard;
-
- spinlock_t lock;
-
- int dma;
- struct mx2_buffer *active;
- struct mx2_buffer *fb1_active;
- struct mx2_buffer *fb2_active;
-
- u32 csicr1;
- enum mx2_camera_type devtype;
-
- struct mx2_buf_internal buf_discard[2];
- void *discard_buffer;
- dma_addr_t discard_buffer_dma;
- size_t discard_size;
- struct mx2_fmt_cfg *emma_prp;
- struct emma_prp_resize resizing[2];
- unsigned int s_width, s_height;
- u32 frame_count;
- struct vb2_alloc_ctx *alloc_ctx;
-};
-
-static struct platform_device_id mx2_camera_devtype[] = {
- {
- .name = "imx27-camera",
- .driver_data = IMX27_CAMERA,
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
-
-static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
-{
- return container_of(int_buf, struct mx2_buffer, internal);
-}
-
-static struct mx2_fmt_cfg mx27_emma_prp_table[] = {
- /*
- * This is a generic configuration which is valid for most
- * prp input-output format combinations.
- * We set the incoming and outgoing pixelformat to a
- * 16 Bit wide format and adjust the bytesperline
- * accordingly. With this configuration the inputdata
- * will not be changed by the emma and could be any type
- * of 16 Bit Pixelformat.
- */
- {
- .in_fmt = 0,
- .out_fmt = 0,
- .cfg = {
- .channel = 1,
- .in_fmt = PRP_CNTL_DATA_IN_RGB16,
- .out_fmt = PRP_CNTL_CH1_OUT_RGB16,
- .src_pixel = 0x2ca00565, /* RGB565 */
- .ch1_pixel = 0x2ca00565, /* RGB565 */
- .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
- PRP_INTR_CH1FC | PRP_INTR_LBOVF,
- .csicr1 = 0,
- }
- },
- {
- .in_fmt = MEDIA_BUS_FMT_UYVY8_2X8,
- .out_fmt = V4L2_PIX_FMT_YUYV,
- .cfg = {
- .channel = 1,
- .in_fmt = PRP_CNTL_DATA_IN_YUV422,
- .out_fmt = PRP_CNTL_CH1_OUT_YUV422,
- .src_pixel = 0x22000888, /* YUV422 (YUYV) */
- .ch1_pixel = 0x62000888, /* YUV422 (YUYV) */
- .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
- PRP_INTR_CH1FC | PRP_INTR_LBOVF,
- .csicr1 = CSICR1_SWAP16_EN,
- }
- },
- {
- .in_fmt = MEDIA_BUS_FMT_YUYV8_2X8,
- .out_fmt = V4L2_PIX_FMT_YUYV,
- .cfg = {
- .channel = 1,
- .in_fmt = PRP_CNTL_DATA_IN_YUV422,
- .out_fmt = PRP_CNTL_CH1_OUT_YUV422,
- .src_pixel = 0x22000888, /* YUV422 (YUYV) */
- .ch1_pixel = 0x62000888, /* YUV422 (YUYV) */
- .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
- PRP_INTR_CH1FC | PRP_INTR_LBOVF,
- .csicr1 = CSICR1_PACK_DIR,
- }
- },
- {
- .in_fmt = MEDIA_BUS_FMT_YUYV8_2X8,
- .out_fmt = V4L2_PIX_FMT_YUV420,
- .cfg = {
- .channel = 2,
- .in_fmt = PRP_CNTL_DATA_IN_YUV422,
- .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
- .src_pixel = 0x22000888, /* YUV422 (YUYV) */
- .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
- PRP_INTR_CH2FC | PRP_INTR_LBOVF |
- PRP_INTR_CH2OVF,
- .csicr1 = CSICR1_PACK_DIR,
- }
- },
- {
- .in_fmt = MEDIA_BUS_FMT_UYVY8_2X8,
- .out_fmt = V4L2_PIX_FMT_YUV420,
- .cfg = {
- .channel = 2,
- .in_fmt = PRP_CNTL_DATA_IN_YUV422,
- .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
- .src_pixel = 0x22000888, /* YUV422 (YUYV) */
- .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
- PRP_INTR_CH2FC | PRP_INTR_LBOVF |
- PRP_INTR_CH2OVF,
- .csicr1 = CSICR1_SWAP16_EN,
- }
- },
-};
-
-static struct mx2_fmt_cfg *mx27_emma_prp_get_format(u32 in_fmt, u32 out_fmt)
-{
- int i;
-
- for (i = 1; i < ARRAY_SIZE(mx27_emma_prp_table); i++)
- if ((mx27_emma_prp_table[i].in_fmt == in_fmt) &&
- (mx27_emma_prp_table[i].out_fmt == out_fmt)) {
- return &mx27_emma_prp_table[i];
- }
- /* If no match return the most generic configuration */
- return &mx27_emma_prp_table[0];
-};
-
-static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev,
- unsigned long phys, int bufnum)
-{
- struct mx2_fmt_cfg *prp = pcdev->emma_prp;
-
- if (prp->cfg.channel == 1) {
- writel(phys, pcdev->base_emma +
- PRP_DEST_RGB1_PTR + 4 * bufnum);
- } else {
- writel(phys, pcdev->base_emma +
- PRP_DEST_Y_PTR - 0x14 * bufnum);
- if (prp->out_fmt == V4L2_PIX_FMT_YUV420) {
- u32 imgsize = pcdev->soc_host.icd->user_height *
- pcdev->soc_host.icd->user_width;
-
- writel(phys + imgsize, pcdev->base_emma +
- PRP_DEST_CB_PTR - 0x14 * bufnum);
- writel(phys + ((5 * imgsize) / 4), pcdev->base_emma +
- PRP_DEST_CR_PTR - 0x14 * bufnum);
- }
- }
-}
-
-static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
-{
- clk_disable_unprepare(pcdev->clk_csi_ahb);
- clk_disable_unprepare(pcdev->clk_csi_per);
- writel(0, pcdev->base_csi + CSICR1);
- writel(0, pcdev->base_emma + PRP_CNTL);
-}
-
-static int mx2_camera_add_device(struct soc_camera_device *icd)
-{
- dev_info(icd->parent, "Camera driver attached to camera %d\n",
- icd->devnum);
-
- return 0;
-}
-
-static void mx2_camera_remove_device(struct soc_camera_device *icd)
-{
- dev_info(icd->parent, "Camera driver detached from camera %d\n",
- icd->devnum);
-}
-
-/*
- * The following two functions absolutely depend on the fact, that
- * there can be only one camera on mx2 camera sensor interface
- */
-static int mx2_camera_clock_start(struct soc_camera_host *ici)
-{
- struct mx2_camera_dev *pcdev = ici->priv;
- int ret;
- u32 csicr1;
-
- ret = clk_prepare_enable(pcdev->clk_csi_ahb);
- if (ret < 0)
- return ret;
-
- ret = clk_prepare_enable(pcdev->clk_csi_per);
- if (ret < 0)
- goto exit_csi_ahb;
-
- csicr1 = CSICR1_MCLKEN | CSICR1_PRP_IF_EN | CSICR1_FCC |
- CSICR1_RXFF_LEVEL(0);
-
- pcdev->csicr1 = csicr1;
- writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
-
- pcdev->frame_count = 0;
-
- return 0;
-
-exit_csi_ahb:
- clk_disable_unprepare(pcdev->clk_csi_ahb);
-
- return ret;
-}
-
-static void mx2_camera_clock_stop(struct soc_camera_host *ici)
-{
- struct mx2_camera_dev *pcdev = ici->priv;
-
- mx2_camera_deactivate(pcdev);
-}
-
-/*
- * Videobuf operations
- */
-static int mx2_videobuf_setup(struct vb2_queue *vq,
- unsigned int *count, unsigned int *num_planes,
- unsigned int sizes[], void *alloc_ctxs[])
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
-
- dev_dbg(icd->parent, "count=%d, size=%d\n", *count, sizes[0]);
-
- alloc_ctxs[0] = pcdev->alloc_ctx;
-
- sizes[0] = icd->sizeimage;
-
- if (0 == *count)
- *count = 32;
- if (!*num_planes &&
- sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024)
- *count = (MAX_VIDEO_MEM * 1024 * 1024) / sizes[0];
-
- *num_planes = 1;
-
- return 0;
-}
-
-static int mx2_videobuf_prepare(struct vb2_buffer *vb)
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
- int ret = 0;
-
- dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
- vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
-
-#ifdef DEBUG
- /*
- * This can be useful if you want to see if we actually fill
- * the buffer with something
- */
- memset((void *)vb2_plane_vaddr(vb, 0),
- 0xaa, vb2_get_plane_payload(vb, 0));
-#endif
-
- vb2_set_plane_payload(vb, 0, icd->sizeimage);
- if (vb2_plane_vaddr(vb, 0) &&
- vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
- ret = -EINVAL;
- goto out;
- }
-
- return 0;
-
-out:
- return ret;
-}
-
-static void mx2_videobuf_queue(struct vb2_buffer *vb)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct mx2_buffer *buf = container_of(vbuf, struct mx2_buffer, vb);
- unsigned long flags;
-
- dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
- vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
-
- spin_lock_irqsave(&pcdev->lock, flags);
-
- list_add_tail(&buf->internal.queue, &pcdev->capture);
-
- spin_unlock_irqrestore(&pcdev->lock, flags);
-}
-
-static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
- int bytesperline)
-{
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct mx2_fmt_cfg *prp = pcdev->emma_prp;
-
- writel((pcdev->s_width << 16) | pcdev->s_height,
- pcdev->base_emma + PRP_SRC_FRAME_SIZE);
- writel(prp->cfg.src_pixel,
- pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL);
- if (prp->cfg.channel == 1) {
- writel((icd->user_width << 16) | icd->user_height,
- pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE);
- writel(bytesperline,
- pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE);
- writel(prp->cfg.ch1_pixel,
- pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL);
- } else { /* channel 2 */
- writel((icd->user_width << 16) | icd->user_height,
- pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
- }
-
- /* Enable interrupts */
- writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL);
-}
-
-static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev)
-{
- int dir;
-
- for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
- unsigned char *s = pcdev->resizing[dir].s;
- int len = pcdev->resizing[dir].len;
- unsigned int coeff[2] = {0, 0};
- unsigned int valid = 0;
- int i;
-
- if (len == 0)
- continue;
-
- for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) {
- int j;
-
- j = i > 9 ? 1 : 0;
- coeff[j] = (coeff[j] << BC_COEF) |
- (s[i] & (SZ_COEF - 1));
-
- if (i == 5 || i == 15)
- coeff[j] <<= 1;
-
- valid = (valid << 1) | (s[i] >> BC_COEF);
- }
-
- valid |= PRP_RZ_VALID_TBL_LEN(len);
-
- if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR)
- valid |= PRP_RZ_VALID_BILINEAR;
-
- if (pcdev->emma_prp->cfg.channel == 1) {
- if (dir == RESIZE_DIR_H) {
- writel(coeff[0], pcdev->base_emma +
- PRP_CH1_RZ_HORI_COEF1);
- writel(coeff[1], pcdev->base_emma +
- PRP_CH1_RZ_HORI_COEF2);
- writel(valid, pcdev->base_emma +
- PRP_CH1_RZ_HORI_VALID);
- } else {
- writel(coeff[0], pcdev->base_emma +
- PRP_CH1_RZ_VERT_COEF1);
- writel(coeff[1], pcdev->base_emma +
- PRP_CH1_RZ_VERT_COEF2);
- writel(valid, pcdev->base_emma +
- PRP_CH1_RZ_VERT_VALID);
- }
- } else {
- if (dir == RESIZE_DIR_H) {
- writel(coeff[0], pcdev->base_emma +
- PRP_CH2_RZ_HORI_COEF1);
- writel(coeff[1], pcdev->base_emma +
- PRP_CH2_RZ_HORI_COEF2);
- writel(valid, pcdev->base_emma +
- PRP_CH2_RZ_HORI_VALID);
- } else {
- writel(coeff[0], pcdev->base_emma +
- PRP_CH2_RZ_VERT_COEF1);
- writel(coeff[1], pcdev->base_emma +
- PRP_CH2_RZ_VERT_COEF2);
- writel(valid, pcdev->base_emma +
- PRP_CH2_RZ_VERT_VALID);
- }
- }
- }
-}
-
-static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(q);
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct mx2_fmt_cfg *prp = pcdev->emma_prp;
- struct vb2_buffer *vb;
- struct mx2_buffer *buf;
- unsigned long phys;
- int bytesperline;
- unsigned long flags;
-
- if (count < 2)
- return -ENOBUFS;
-
- spin_lock_irqsave(&pcdev->lock, flags);
-
- buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
- internal.queue);
- buf->internal.bufnum = 0;
- vb = &buf->vb.vb2_buf;
-
- phys = vb2_dma_contig_plane_dma_addr(vb, 0);
- mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
- list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
-
- buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
- internal.queue);
- buf->internal.bufnum = 1;
- vb = &buf->vb.vb2_buf;
-
- phys = vb2_dma_contig_plane_dma_addr(vb, 0);
- mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
- list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
-
- bytesperline = soc_mbus_bytes_per_line(icd->user_width,
- icd->current_fmt->host_fmt);
- if (bytesperline < 0) {
- spin_unlock_irqrestore(&pcdev->lock, flags);
- return bytesperline;
- }
-
- /*
- * I didn't manage to properly enable/disable the prp
- * on a per frame basis during running transfers,
- * thus we allocate a buffer here and use it to
- * discard frames when no buffer is available.
- * Feel free to work on this ;)
- */
- pcdev->discard_size = icd->user_height * bytesperline;
- pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev,
- pcdev->discard_size,
- &pcdev->discard_buffer_dma, GFP_ATOMIC);
- if (!pcdev->discard_buffer) {
- spin_unlock_irqrestore(&pcdev->lock, flags);
- return -ENOMEM;
- }
-
- pcdev->buf_discard[0].discard = true;
- list_add_tail(&pcdev->buf_discard[0].queue,
- &pcdev->discard);
-
- pcdev->buf_discard[1].discard = true;
- list_add_tail(&pcdev->buf_discard[1].queue,
- &pcdev->discard);
-
- mx2_prp_resize_commit(pcdev);
-
- mx27_camera_emma_buf_init(icd, bytesperline);
-
- if (prp->cfg.channel == 1) {
- writel(PRP_CNTL_CH1EN |
- PRP_CNTL_CSIEN |
- prp->cfg.in_fmt |
- prp->cfg.out_fmt |
- PRP_CNTL_CH1_LEN |
- PRP_CNTL_CH1BYP |
- PRP_CNTL_CH1_TSKIP(0) |
- PRP_CNTL_IN_TSKIP(0),
- pcdev->base_emma + PRP_CNTL);
- } else {
- writel(PRP_CNTL_CH2EN |
- PRP_CNTL_CSIEN |
- prp->cfg.in_fmt |
- prp->cfg.out_fmt |
- PRP_CNTL_CH2_LEN |
- PRP_CNTL_CH2_TSKIP(0) |
- PRP_CNTL_IN_TSKIP(0),
- pcdev->base_emma + PRP_CNTL);
- }
- spin_unlock_irqrestore(&pcdev->lock, flags);
-
- return 0;
-}
-
-static void mx2_stop_streaming(struct vb2_queue *q)
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(q);
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct mx2_fmt_cfg *prp = pcdev->emma_prp;
- unsigned long flags;
- void *b;
- u32 cntl;
-
- spin_lock_irqsave(&pcdev->lock, flags);
-
- cntl = readl(pcdev->base_emma + PRP_CNTL);
- if (prp->cfg.channel == 1) {
- writel(cntl & ~PRP_CNTL_CH1EN,
- pcdev->base_emma + PRP_CNTL);
- } else {
- writel(cntl & ~PRP_CNTL_CH2EN,
- pcdev->base_emma + PRP_CNTL);
- }
- INIT_LIST_HEAD(&pcdev->capture);
- INIT_LIST_HEAD(&pcdev->active_bufs);
- INIT_LIST_HEAD(&pcdev->discard);
-
- b = pcdev->discard_buffer;
- pcdev->discard_buffer = NULL;
-
- spin_unlock_irqrestore(&pcdev->lock, flags);
-
- dma_free_coherent(ici->v4l2_dev.dev,
- pcdev->discard_size, b, pcdev->discard_buffer_dma);
-}
-
-static struct vb2_ops mx2_videobuf_ops = {
- .queue_setup = mx2_videobuf_setup,
- .buf_prepare = mx2_videobuf_prepare,
- .buf_queue = mx2_videobuf_queue,
- .start_streaming = mx2_start_streaming,
- .stop_streaming = mx2_stop_streaming,
-};
-
-static int mx2_camera_init_videobuf(struct vb2_queue *q,
- struct soc_camera_device *icd)
-{
- q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- q->io_modes = VB2_MMAP | VB2_USERPTR;
- q->drv_priv = icd;
- q->ops = &mx2_videobuf_ops;
- q->mem_ops = &vb2_dma_contig_memops;
- q->buf_struct_size = sizeof(struct mx2_buffer);
- q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-
- return vb2_queue_init(q);
-}
-
-#define MX2_BUS_FLAGS (V4L2_MBUS_MASTER | \
- V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
- V4L2_MBUS_VSYNC_ACTIVE_LOW | \
- V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
- V4L2_MBUS_HSYNC_ACTIVE_LOW | \
- V4L2_MBUS_PCLK_SAMPLE_RISING | \
- V4L2_MBUS_PCLK_SAMPLE_FALLING | \
- V4L2_MBUS_DATA_ACTIVE_HIGH | \
- V4L2_MBUS_DATA_ACTIVE_LOW)
-
-static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev)
-{
- int count = 0;
-
- readl(pcdev->base_emma + PRP_CNTL);
- writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
- while (count++ < 100) {
- if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST))
- return 0;
- barrier();
- udelay(1);
- }
-
- return -ETIMEDOUT;
-}
-
-static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
-{
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- unsigned long common_flags;
- int ret;
- int bytesperline;
- u32 csicr1 = pcdev->csicr1;
-
- ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = soc_mbus_config_compatible(&cfg, MX2_BUS_FLAGS);
- if (!common_flags) {
- dev_warn(icd->parent,
- "Flags incompatible: camera 0x%x, host 0x%x\n",
- cfg.flags, MX2_BUS_FLAGS);
- return -EINVAL;
- }
- } else if (ret != -ENOIOCTLCMD) {
- return ret;
- } else {
- common_flags = MX2_BUS_FLAGS;
- }
-
- if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH)
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
- else
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
- }
-
- if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
- (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
- if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING)
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
- else
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
- }
-
- cfg.flags = common_flags;
- ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
- if (ret < 0 && ret != -ENOIOCTLCMD) {
- dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
- common_flags, ret);
- return ret;
- }
-
- csicr1 = (csicr1 & ~CSICR1_FMT_MASK) | pcdev->emma_prp->cfg.csicr1;
-
- if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
- csicr1 |= CSICR1_REDGE;
- if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
- csicr1 |= CSICR1_SOF_POL;
- if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
- csicr1 |= CSICR1_HSYNC_POL;
- if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC)
- csicr1 |= CSICR1_EXT_VSYNC;
- if (pcdev->platform_flags & MX2_CAMERA_CCIR)
- csicr1 |= CSICR1_CCIR_EN;
- if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE)
- csicr1 |= CSICR1_CCIR_MODE;
- if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK)
- csicr1 |= CSICR1_GCLK_MODE;
- if (pcdev->platform_flags & MX2_CAMERA_INV_DATA)
- csicr1 |= CSICR1_INV_DATA;
-
- pcdev->csicr1 = csicr1;
-
- bytesperline = soc_mbus_bytes_per_line(icd->user_width,
- icd->current_fmt->host_fmt);
- if (bytesperline < 0)
- return bytesperline;
-
- ret = mx27_camera_emma_prp_reset(pcdev);
- if (ret)
- return ret;
-
- writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
-
- return 0;
-}
-
-static int mx2_camera_set_crop(struct soc_camera_device *icd,
- const struct v4l2_crop *a)
-{
- struct v4l2_crop a_writable = *a;
- struct v4l2_rect *rect = &a_writable.c;
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- struct v4l2_subdev_format fmt = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- struct v4l2_mbus_framefmt *mf = &fmt.format;
- int ret;
-
- soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
- soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
-
- ret = v4l2_subdev_call(sd, video, s_crop, a);
- if (ret < 0)
- return ret;
-
- /* The capture device might have changed its output */
- ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
- if (ret < 0)
- return ret;
-
- dev_dbg(icd->parent, "Sensor cropped %dx%d\n",
- mf->width, mf->height);
-
- icd->user_width = mf->width;
- icd->user_height = mf->height;
-
- return ret;
-}
-
-static int mx2_camera_get_formats(struct soc_camera_device *icd,
- unsigned int idx,
- struct soc_camera_format_xlate *xlate)
-{
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- const struct soc_mbus_pixelfmt *fmt;
- struct device *dev = icd->parent;
- struct v4l2_subdev_mbus_code_enum code = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- .index = idx,
- };
- int ret, formats = 0;
-
- ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
- if (ret < 0)
- /* no more formats */
- return 0;
-
- fmt = soc_mbus_get_fmtdesc(code.code);
- if (!fmt) {
- dev_err(dev, "Invalid format code #%u: %d\n", idx, code.code);
- return 0;
- }
-
- if (code.code == MEDIA_BUS_FMT_YUYV8_2X8 ||
- code.code == MEDIA_BUS_FMT_UYVY8_2X8) {
- formats++;
- if (xlate) {
- /*
- * CH2 can output YUV420 which is a standard format in
- * soc_mediabus.c
- */
- xlate->host_fmt =
- soc_mbus_get_fmtdesc(MEDIA_BUS_FMT_YUYV8_1_5X8);
- xlate->code = code.code;
- dev_dbg(dev, "Providing host format %s for sensor code %d\n",
- xlate->host_fmt->name, code.code);
- xlate++;
- }
- }
-
- if (code.code == MEDIA_BUS_FMT_UYVY8_2X8) {
- formats++;
- if (xlate) {
- xlate->host_fmt =
- soc_mbus_get_fmtdesc(MEDIA_BUS_FMT_YUYV8_2X8);
- xlate->code = code.code;
- dev_dbg(dev, "Providing host format %s for sensor code %d\n",
- xlate->host_fmt->name, code.code);
- xlate++;
- }
- }
-
- /* Generic pass-trough */
- formats++;
- if (xlate) {
- xlate->host_fmt = fmt;
- xlate->code = code.code;
- xlate++;
- }
- return formats;
-}
-
-static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev,
- struct v4l2_mbus_framefmt *mf_in,
- struct v4l2_pix_format *pix_out, bool apply)
-{
- unsigned int num, den;
- unsigned long m;
- int i, dir;
-
- for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
- struct emma_prp_resize tmprsz;
- unsigned char *s = tmprsz.s;
- int len = 0;
- int in, out;
-
- if (dir == RESIZE_DIR_H) {
- in = mf_in->width;
- out = pix_out->width;
- } else {
- in = mf_in->height;
- out = pix_out->height;
- }
-
- if (in < out)
- return -EINVAL;
- else if (in == out)
- continue;
-
- /* Calculate ratio */
- m = gcd(in, out);
- num = in / m;
- den = out / m;
- if (num > RESIZE_NUM_MAX)
- return -EINVAL;
-
- if ((num >= 2 * den) && (den == 1) &&
- (num < 9) && (!(num & 0x01))) {
- int sum = 0;
- int j;
-
- /* Average scaling for >= 2:1 ratios */
- /* Support can be added for num >=9 and odd values */
-
- tmprsz.algo = RESIZE_ALGO_AVERAGING;
- len = num;
-
- for (i = 0; i < (len / 2); i++)
- s[i] = 8;
-
- do {
- for (i = 0; i < (len / 2); i++) {
- s[i] = s[i] >> 1;
- sum = 0;
- for (j = 0; j < (len / 2); j++)
- sum += s[j];
- if (sum == 4)
- break;
- }
- } while (sum != 4);
-
- for (i = (len / 2); i < len; i++)
- s[i] = s[len - i - 1];
-
- s[len - 1] |= SZ_COEF;
- } else {
- /* bilinear scaling for < 2:1 ratios */
- int v; /* overflow counter */
- int coeff, nxt; /* table output */
- int in_pos_inc = 2 * den;
- int out_pos = num;
- int out_pos_inc = 2 * num;
- int init_carry = num - den;
- int carry = init_carry;
-
- tmprsz.algo = RESIZE_ALGO_BILINEAR;
- v = den + in_pos_inc;
- do {
- coeff = v - out_pos;
- out_pos += out_pos_inc;
- carry += out_pos_inc;
- for (nxt = 0; v < out_pos; nxt++) {
- v += in_pos_inc;
- carry -= in_pos_inc;
- }
-
- if (len > RESIZE_NUM_MAX)
- return -EINVAL;
-
- coeff = ((coeff << BC_COEF) +
- (in_pos_inc >> 1)) / in_pos_inc;
-
- if (coeff >= (SZ_COEF - 1))
- coeff--;
-
- coeff |= SZ_COEF;
- s[len] = (unsigned char)coeff;
- len++;
-
- for (i = 1; i < nxt; i++) {
- if (len >= RESIZE_NUM_MAX)
- return -EINVAL;
- s[len] = 0;
- len++;
- }
- } while (carry != init_carry);
- }
- tmprsz.len = len;
- if (dir == RESIZE_DIR_H)
- mf_in->width = pix_out->width;
- else
- mf_in->height = pix_out->height;
-
- if (apply)
- memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz));
- }
- return 0;
-}
-
-static int mx2_camera_set_fmt(struct soc_camera_device *icd,
- struct v4l2_format *f)
-{
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- const struct soc_camera_format_xlate *xlate;
- struct v4l2_pix_format *pix = &f->fmt.pix;
- struct v4l2_subdev_format format = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- struct v4l2_mbus_framefmt *mf = &format.format;
- int ret;
-
- dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
- __func__, pix->width, pix->height);
-
- xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
- if (!xlate) {
- dev_warn(icd->parent, "Format %x not found\n",
- pix->pixelformat);
- return -EINVAL;
- }
-
- mf->width = pix->width;
- mf->height = pix->height;
- mf->field = pix->field;
- mf->colorspace = pix->colorspace;
- mf->code = xlate->code;
-
- ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format);
- if (ret < 0 && ret != -ENOIOCTLCMD)
- return ret;
-
- /* Store width and height returned by the sensor for resizing */
- pcdev->s_width = mf->width;
- pcdev->s_height = mf->height;
- dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
- __func__, pcdev->s_width, pcdev->s_height);
-
- pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
- xlate->host_fmt->fourcc);
-
- memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
- if ((mf->width != pix->width || mf->height != pix->height) &&
- pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
- if (mx2_emmaprp_resize(pcdev, mf, pix, true) < 0)
- dev_dbg(icd->parent, "%s: can't resize\n", __func__);
- }
-
- if (mf->code != xlate->code)
- return -EINVAL;
-
- pix->width = mf->width;
- pix->height = mf->height;
- pix->field = mf->field;
- pix->colorspace = mf->colorspace;
- icd->current_fmt = xlate;
-
- dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
- __func__, pix->width, pix->height);
-
- return 0;
-}
-
-static int mx2_camera_try_fmt(struct soc_camera_device *icd,
- struct v4l2_format *f)
-{
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- const struct soc_camera_format_xlate *xlate;
- struct v4l2_pix_format *pix = &f->fmt.pix;
- struct v4l2_subdev_pad_config pad_cfg;
- struct v4l2_subdev_format format = {
- .which = V4L2_SUBDEV_FORMAT_TRY,
- };
- struct v4l2_mbus_framefmt *mf = &format.format;
- __u32 pixfmt = pix->pixelformat;
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct mx2_camera_dev *pcdev = ici->priv;
- struct mx2_fmt_cfg *emma_prp;
- int ret;
-
- dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
- __func__, pix->width, pix->height);
-
- xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
- if (pixfmt && !xlate) {
- dev_warn(icd->parent, "Format %x not found\n", pixfmt);
- return -EINVAL;
- }
-
- /*
- * limit to MX27 hardware capabilities: width must be a multiple of 8 as
- * requested by the CSI. (Table 39-2 in the i.MX27 Reference Manual).
- */
- pix->width &= ~0x7;
-
- /* limit to sensor capabilities */
- mf->width = pix->width;
- mf->height = pix->height;
- mf->field = pix->field;
- mf->colorspace = pix->colorspace;
- mf->code = xlate->code;
-
- ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format);
- if (ret < 0)
- return ret;
-
- dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
- __func__, pcdev->s_width, pcdev->s_height);
-
- /* If the sensor does not support image size try PrP resizing */
- emma_prp = mx27_emma_prp_get_format(xlate->code,
- xlate->host_fmt->fourcc);
-
- if ((mf->width != pix->width || mf->height != pix->height) &&
- emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
- if (mx2_emmaprp_resize(pcdev, mf, pix, false) < 0)
- dev_dbg(icd->parent, "%s: can't resize\n", __func__);
- }
-
- if (mf->field == V4L2_FIELD_ANY)
- mf->field = V4L2_FIELD_NONE;
- /*
- * Driver supports interlaced images provided they have
- * both fields so that they can be processed as if they
- * were progressive.
- */
- if (mf->field != V4L2_FIELD_NONE && !V4L2_FIELD_HAS_BOTH(mf->field)) {
- dev_err(icd->parent, "Field type %d unsupported.\n",
- mf->field);
- return -EINVAL;
- }
-
- pix->width = mf->width;
- pix->height = mf->height;
- pix->field = mf->field;
- pix->colorspace = mf->colorspace;
-
- dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
- __func__, pix->width, pix->height);
-
- return 0;
-}
-
-static int mx2_camera_querycap(struct soc_camera_host *ici,
- struct v4l2_capability *cap)
-{
- /* cap->name is set by the friendly caller:-> */
- strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card));
- cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
- cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
-
- return 0;
-}
-
-static unsigned int mx2_camera_poll(struct file *file, poll_table *pt)
-{
- struct soc_camera_device *icd = file->private_data;
-
- return vb2_poll(&icd->vb2_vidq, file, pt);
-}
-
-static struct soc_camera_host_ops mx2_soc_camera_host_ops = {
- .owner = THIS_MODULE,
- .add = mx2_camera_add_device,
- .remove = mx2_camera_remove_device,
- .clock_start = mx2_camera_clock_start,
- .clock_stop = mx2_camera_clock_stop,
- .set_fmt = mx2_camera_set_fmt,
- .set_crop = mx2_camera_set_crop,
- .get_formats = mx2_camera_get_formats,
- .try_fmt = mx2_camera_try_fmt,
- .init_videobuf2 = mx2_camera_init_videobuf,
- .poll = mx2_camera_poll,
- .querycap = mx2_camera_querycap,
- .set_bus_param = mx2_camera_set_bus_param,
-};
-
-static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
- int bufnum, bool err)
-{
-#ifdef DEBUG
- struct mx2_fmt_cfg *prp = pcdev->emma_prp;
-#endif
- struct mx2_buf_internal *ibuf;
- struct mx2_buffer *buf;
- struct vb2_buffer *vb;
- struct vb2_v4l2_buffer *vbuf;
- unsigned long phys;
-
- ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal,
- queue);
-
- BUG_ON(ibuf->bufnum != bufnum);
-
- if (ibuf->discard) {
- /*
- * Discard buffer must not be returned to user space.
- * Just return it to the discard queue.
- */
- list_move_tail(pcdev->active_bufs.next, &pcdev->discard);
- } else {
- buf = mx2_ibuf_to_buf(ibuf);
-
- vb = &buf->vb.vb2_buf;
- vbuf = to_vb2_v4l2_buffer(vb);
-#ifdef DEBUG
- phys = vb2_dma_contig_plane_dma_addr(vb, 0);
- if (prp->cfg.channel == 1) {
- if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR +
- 4 * bufnum) != phys) {
- dev_err(pcdev->dev, "%lx != %x\n", phys,
- readl(pcdev->base_emma +
- PRP_DEST_RGB1_PTR + 4 * bufnum));
- }
- } else {
- if (readl(pcdev->base_emma + PRP_DEST_Y_PTR -
- 0x14 * bufnum) != phys) {
- dev_err(pcdev->dev, "%lx != %x\n", phys,
- readl(pcdev->base_emma +
- PRP_DEST_Y_PTR - 0x14 * bufnum));
- }
- }
-#endif
- dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb,
- vb2_plane_vaddr(vb, 0),
- vb2_get_plane_payload(vb, 0));
-
- list_del_init(&buf->internal.queue);
- vb->timestamp = ktime_get_ns();
- vbuf->sequence = pcdev->frame_count;
- if (err)
- vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
- else
- vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
- }
-
- pcdev->frame_count++;
-
- if (list_empty(&pcdev->capture)) {
- if (list_empty(&pcdev->discard)) {
- dev_warn(pcdev->dev, "%s: trying to access empty discard list\n",
- __func__);
- return;
- }
-
- ibuf = list_first_entry(&pcdev->discard,
- struct mx2_buf_internal, queue);
- ibuf->bufnum = bufnum;
-
- list_move_tail(pcdev->discard.next, &pcdev->active_bufs);
- mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum);
- return;
- }
-
- buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
- internal.queue);
-
- buf->internal.bufnum = bufnum;
-
- list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
-
- vb = &buf->vb.vb2_buf;
-
- phys = vb2_dma_contig_plane_dma_addr(vb, 0);
- mx27_update_emma_buf(pcdev, phys, bufnum);
-}
-
-static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
-{
- struct mx2_camera_dev *pcdev = data;
- unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS);
- struct mx2_buf_internal *ibuf;
-
- spin_lock(&pcdev->lock);
-
- if (list_empty(&pcdev->active_bufs)) {
- dev_warn(pcdev->dev, "%s: called while active list is empty\n",
- __func__);
-
- if (!status) {
- spin_unlock(&pcdev->lock);
- return IRQ_NONE;
- }
- }
-
- if (status & (1 << 7)) { /* overflow */
- u32 cntl = readl(pcdev->base_emma + PRP_CNTL);
- writel(cntl & ~(PRP_CNTL_CH1EN | PRP_CNTL_CH2EN),
- pcdev->base_emma + PRP_CNTL);
- writel(cntl, pcdev->base_emma + PRP_CNTL);
-
- ibuf = list_first_entry(&pcdev->active_bufs,
- struct mx2_buf_internal, queue);
- mx27_camera_frame_done_emma(pcdev,
- ibuf->bufnum, true);
-
- status &= ~(1 << 7);
- } else if (((status & (3 << 5)) == (3 << 5)) ||
- ((status & (3 << 3)) == (3 << 3))) {
- /*
- * Both buffers have triggered, process the one we're expecting
- * to first
- */
- ibuf = list_first_entry(&pcdev->active_bufs,
- struct mx2_buf_internal, queue);
- mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false);
- status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */
- } else if ((status & (1 << 6)) || (status & (1 << 4))) {
- mx27_camera_frame_done_emma(pcdev, 0, false);
- } else if ((status & (1 << 5)) || (status & (1 << 3))) {
- mx27_camera_frame_done_emma(pcdev, 1, false);
- }
-
- spin_unlock(&pcdev->lock);
- writel(status, pcdev->base_emma + PRP_INTRSTATUS);
-
- return IRQ_HANDLED;
-}
-
-static int mx27_camera_emma_init(struct platform_device *pdev)
-{
- struct mx2_camera_dev *pcdev = platform_get_drvdata(pdev);
- struct resource *res_emma;
- int irq_emma;
- int err = 0;
-
- res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- irq_emma = platform_get_irq(pdev, 1);
- if (!res_emma || !irq_emma) {
- dev_err(pcdev->dev, "no EMMA resources\n");
- err = -ENODEV;
- goto out;
- }
-
- pcdev->base_emma = devm_ioremap_resource(pcdev->dev, res_emma);
- if (IS_ERR(pcdev->base_emma)) {
- err = PTR_ERR(pcdev->base_emma);
- goto out;
- }
-
- err = devm_request_irq(pcdev->dev, irq_emma, mx27_camera_emma_irq, 0,
- MX2_CAM_DRV_NAME, pcdev);
- if (err) {
- dev_err(pcdev->dev, "Camera EMMA interrupt register failed\n");
- goto out;
- }
-
- pcdev->clk_emma_ipg = devm_clk_get(pcdev->dev, "emma-ipg");
- if (IS_ERR(pcdev->clk_emma_ipg)) {
- err = PTR_ERR(pcdev->clk_emma_ipg);
- goto out;
- }
-
- clk_prepare_enable(pcdev->clk_emma_ipg);
-
- pcdev->clk_emma_ahb = devm_clk_get(pcdev->dev, "emma-ahb");
- if (IS_ERR(pcdev->clk_emma_ahb)) {
- err = PTR_ERR(pcdev->clk_emma_ahb);
- goto exit_clk_emma_ipg;
- }
-
- clk_prepare_enable(pcdev->clk_emma_ahb);
-
- err = mx27_camera_emma_prp_reset(pcdev);
- if (err)
- goto exit_clk_emma_ahb;
-
- return err;
-
-exit_clk_emma_ahb:
- clk_disable_unprepare(pcdev->clk_emma_ahb);
-exit_clk_emma_ipg:
- clk_disable_unprepare(pcdev->clk_emma_ipg);
-out:
- return err;
-}
-
-static int mx2_camera_probe(struct platform_device *pdev)
-{
- struct mx2_camera_dev *pcdev;
- struct resource *res_csi;
- int irq_csi;
- int err = 0;
-
- dev_dbg(&pdev->dev, "initialising\n");
-
- res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irq_csi = platform_get_irq(pdev, 0);
- if (res_csi == NULL || irq_csi < 0) {
- dev_err(&pdev->dev, "Missing platform resources data\n");
- err = -ENODEV;
- goto exit;
- }
-
- pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
- if (!pcdev) {
- dev_err(&pdev->dev, "Could not allocate pcdev\n");
- err = -ENOMEM;
- goto exit;
- }
-
- pcdev->clk_csi_ahb = devm_clk_get(&pdev->dev, "ahb");
- if (IS_ERR(pcdev->clk_csi_ahb)) {
- dev_err(&pdev->dev, "Could not get csi ahb clock\n");
- err = PTR_ERR(pcdev->clk_csi_ahb);
- goto exit;
- }
-
- pcdev->clk_csi_per = devm_clk_get(&pdev->dev, "per");
- if (IS_ERR(pcdev->clk_csi_per)) {
- dev_err(&pdev->dev, "Could not get csi per clock\n");
- err = PTR_ERR(pcdev->clk_csi_per);
- goto exit;
- }
-
- pcdev->pdata = pdev->dev.platform_data;
- if (pcdev->pdata) {
- long rate;
-
- pcdev->platform_flags = pcdev->pdata->flags;
-
- rate = clk_round_rate(pcdev->clk_csi_per,
- pcdev->pdata->clk * 2);
- if (rate <= 0) {
- err = -ENODEV;
- goto exit;
- }
- err = clk_set_rate(pcdev->clk_csi_per, rate);
- if (err < 0)
- goto exit;
- }
-
- INIT_LIST_HEAD(&pcdev->capture);
- INIT_LIST_HEAD(&pcdev->active_bufs);
- INIT_LIST_HEAD(&pcdev->discard);
- spin_lock_init(&pcdev->lock);
-
- pcdev->base_csi = devm_ioremap_resource(&pdev->dev, res_csi);
- if (IS_ERR(pcdev->base_csi)) {
- err = PTR_ERR(pcdev->base_csi);
- goto exit;
- }
-
- pcdev->dev = &pdev->dev;
- platform_set_drvdata(pdev, pcdev);
-
- err = mx27_camera_emma_init(pdev);
- if (err)
- goto exit;
-
- /*
- * We're done with drvdata here. Clear the pointer so that
- * v4l2 core can start using drvdata on its purpose.
- */
- platform_set_drvdata(pdev, NULL);
-
- pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME,
- pcdev->soc_host.ops = &mx2_soc_camera_host_ops,
- pcdev->soc_host.priv = pcdev;
- pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
- pcdev->soc_host.nr = pdev->id;
-
- pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
- if (IS_ERR(pcdev->alloc_ctx)) {
- err = PTR_ERR(pcdev->alloc_ctx);
- goto eallocctx;
- }
- err = soc_camera_host_register(&pcdev->soc_host);
- if (err)
- goto exit_free_emma;
-
- dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
- clk_get_rate(pcdev->clk_csi_per));
-
- return 0;
-
-exit_free_emma:
- vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
-eallocctx:
- clk_disable_unprepare(pcdev->clk_emma_ipg);
- clk_disable_unprepare(pcdev->clk_emma_ahb);
-exit:
- return err;
-}
-
-static int mx2_camera_remove(struct platform_device *pdev)
-{
- struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
- struct mx2_camera_dev *pcdev = container_of(soc_host,
- struct mx2_camera_dev, soc_host);
-
- soc_camera_host_unregister(&pcdev->soc_host);
-
- vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
-
- clk_disable_unprepare(pcdev->clk_emma_ipg);
- clk_disable_unprepare(pcdev->clk_emma_ahb);
-
- dev_info(&pdev->dev, "MX2 Camera driver unloaded\n");
-
- return 0;
-}
-
-static struct platform_driver mx2_camera_driver = {
- .driver = {
- .name = MX2_CAM_DRV_NAME,
- },
- .id_table = mx2_camera_devtype,
- .remove = mx2_camera_remove,
-};
-
-module_platform_driver_probe(mx2_camera_driver, mx2_camera_probe);
-
-MODULE_DESCRIPTION("i.MX27 SoC Camera Host driver");
-MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(MX2_CAM_VERSION);
projects / karo-tx-linux.git / commitdiff