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path: root/drivers/media/platform/soc_camera/atmel-isi.c
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Diffstat (limited to 'drivers/media/platform/soc_camera/atmel-isi.c')
-rw-r--r--drivers/media/platform/soc_camera/atmel-isi.c1167
1 files changed, 0 insertions, 1167 deletions
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
deleted file mode 100644
index 46de657c3e6d..000000000000
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ /dev/null
@@ -1,1167 +0,0 @@
-/*
- * Copyright (c) 2011 Atmel Corporation
- * Josh Wu, <josh.wu@atmel.com>
- *
- * Based on previous work by Lars Haring, <lars.haring@atmel.com>
- * and Sedji Gaouaou
- * Based on the bttv driver for Bt848 with respective copyright holders
- *
- * 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.
- */
-
-#include <linux/clk.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/slab.h>
-
-#include <media/soc_camera.h>
-#include <media/drv-intf/soc_mediabus.h>
-#include <media/v4l2-of.h>
-#include <media/videobuf2-dma-contig.h>
-
-#include "atmel-isi.h"
-
-#define MAX_BUFFER_NUM 32
-#define MAX_SUPPORT_WIDTH 2048
-#define MAX_SUPPORT_HEIGHT 2048
-#define VID_LIMIT_BYTES (16 * 1024 * 1024)
-#define MIN_FRAME_RATE 15
-#define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
-
-/* Frame buffer descriptor */
-struct fbd {
- /* Physical address of the frame buffer */
- u32 fb_address;
- /* DMA Control Register(only in HISI2) */
- u32 dma_ctrl;
- /* Physical address of the next fbd */
- u32 next_fbd_address;
-};
-
-static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
-{
- fb_desc->dma_ctrl = ctrl;
-}
-
-struct isi_dma_desc {
- struct list_head list;
- struct fbd *p_fbd;
- dma_addr_t fbd_phys;
-};
-
-/* Frame buffer data */
-struct frame_buffer {
- struct vb2_v4l2_buffer vb;
- struct isi_dma_desc *p_dma_desc;
- struct list_head list;
-};
-
-struct atmel_isi {
- /* Protects the access of variables shared with the ISR */
- spinlock_t lock;
- void __iomem *regs;
-
- int sequence;
-
- /* Allocate descriptors for dma buffer use */
- struct fbd *p_fb_descriptors;
- dma_addr_t fb_descriptors_phys;
- struct list_head dma_desc_head;
- struct isi_dma_desc dma_desc[MAX_BUFFER_NUM];
- bool enable_preview_path;
-
- struct completion complete;
- /* ISI peripherial clock */
- struct clk *pclk;
- unsigned int irq;
-
- struct isi_platform_data pdata;
- u16 width_flags; /* max 12 bits */
-
- struct list_head video_buffer_list;
- struct frame_buffer *active;
-
- struct soc_camera_host soc_host;
-};
-
-static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
-{
- writel(val, isi->regs + reg);
-}
-static u32 isi_readl(struct atmel_isi *isi, u32 reg)
-{
- return readl(isi->regs + reg);
-}
-
-static u32 setup_cfg2_yuv_swap(struct atmel_isi *isi,
- const struct soc_camera_format_xlate *xlate)
-{
- if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUYV) {
- /* all convert to YUYV */
- switch (xlate->code) {
- case MEDIA_BUS_FMT_VYUY8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_3;
- case MEDIA_BUS_FMT_UYVY8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_2;
- case MEDIA_BUS_FMT_YVYU8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_1;
- }
- } else if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_RGB565) {
- /*
- * Preview path is enabled, it will convert UYVY to RGB format.
- * But if sensor output format is not UYVY, we need to set
- * YCC_SWAP_MODE to convert it as UYVY.
- */
- switch (xlate->code) {
- case MEDIA_BUS_FMT_VYUY8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_1;
- case MEDIA_BUS_FMT_YUYV8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_2;
- case MEDIA_BUS_FMT_YVYU8_2X8:
- return ISI_CFG2_YCC_SWAP_MODE_3;
- }
- }
-
- /*
- * By default, no swap for the codec path of Atmel ISI. So codec
- * output is same as sensor's output.
- * For instance, if sensor's output is YUYV, then codec outputs YUYV.
- * And if sensor's output is UYVY, then codec outputs UYVY.
- */
- return ISI_CFG2_YCC_SWAP_DEFAULT;
-}
-
-static void configure_geometry(struct atmel_isi *isi, u32 width,
- u32 height, const struct soc_camera_format_xlate *xlate)
-{
- u32 cfg2, psize;
- u32 fourcc = xlate->host_fmt->fourcc;
-
- isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 ||
- fourcc == V4L2_PIX_FMT_RGB32;
-
- /* According to sensor's output format to set cfg2 */
- switch (xlate->code) {
- default:
- /* Grey */
- case MEDIA_BUS_FMT_Y8_1X8:
- cfg2 = ISI_CFG2_GRAYSCALE | ISI_CFG2_COL_SPACE_YCbCr;
- break;
- /* YUV */
- case MEDIA_BUS_FMT_VYUY8_2X8:
- case MEDIA_BUS_FMT_UYVY8_2X8:
- case MEDIA_BUS_FMT_YVYU8_2X8:
- case MEDIA_BUS_FMT_YUYV8_2X8:
- cfg2 = ISI_CFG2_COL_SPACE_YCbCr |
- setup_cfg2_yuv_swap(isi, xlate);
- break;
- /* RGB, TODO */
- }
-
- isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
- /* Set width */
- cfg2 |= ((width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
- ISI_CFG2_IM_HSIZE_MASK;
- /* Set height */
- cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
- & ISI_CFG2_IM_VSIZE_MASK;
- isi_writel(isi, ISI_CFG2, cfg2);
-
- /* No down sampling, preview size equal to sensor output size */
- psize = ((width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
- ISI_PSIZE_PREV_HSIZE_MASK;
- psize |= ((height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
- ISI_PSIZE_PREV_VSIZE_MASK;
- isi_writel(isi, ISI_PSIZE, psize);
- isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING);
-
- return;
-}
-
-static bool is_supported(struct soc_camera_device *icd,
- const u32 pixformat)
-{
- switch (pixformat) {
- /* YUV, including grey */
- case V4L2_PIX_FMT_GREY:
- case V4L2_PIX_FMT_YUYV:
- case V4L2_PIX_FMT_UYVY:
- case V4L2_PIX_FMT_YVYU:
- case V4L2_PIX_FMT_VYUY:
- /* RGB */
- case V4L2_PIX_FMT_RGB565:
- return true;
- default:
- return false;
- }
-}
-
-static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
-{
- if (isi->active) {
- struct vb2_v4l2_buffer *vbuf = &isi->active->vb;
- struct frame_buffer *buf = isi->active;
-
- list_del_init(&buf->list);
- vbuf->vb2_buf.timestamp = ktime_get_ns();
- vbuf->sequence = isi->sequence++;
- vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
- }
-
- if (list_empty(&isi->video_buffer_list)) {
- isi->active = NULL;
- } else {
- /* start next dma frame. */
- isi->active = list_entry(isi->video_buffer_list.next,
- struct frame_buffer, list);
- if (!isi->enable_preview_path) {
- isi_writel(isi, ISI_DMA_C_DSCR,
- (u32)isi->active->p_dma_desc->fbd_phys);
- isi_writel(isi, ISI_DMA_C_CTRL,
- ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
- isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
- } else {
- isi_writel(isi, ISI_DMA_P_DSCR,
- (u32)isi->active->p_dma_desc->fbd_phys);
- isi_writel(isi, ISI_DMA_P_CTRL,
- ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
- isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
- }
- }
- return IRQ_HANDLED;
-}
-
-/* ISI interrupt service routine */
-static irqreturn_t isi_interrupt(int irq, void *dev_id)
-{
- struct atmel_isi *isi = dev_id;
- u32 status, mask, pending;
- irqreturn_t ret = IRQ_NONE;
-
- spin_lock(&isi->lock);
-
- status = isi_readl(isi, ISI_STATUS);
- mask = isi_readl(isi, ISI_INTMASK);
- pending = status & mask;
-
- if (pending & ISI_CTRL_SRST) {
- complete(&isi->complete);
- isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST);
- ret = IRQ_HANDLED;
- } else if (pending & ISI_CTRL_DIS) {
- complete(&isi->complete);
- isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS);
- ret = IRQ_HANDLED;
- } else {
- if (likely(pending & ISI_SR_CXFR_DONE) ||
- likely(pending & ISI_SR_PXFR_DONE))
- ret = atmel_isi_handle_streaming(isi);
- }
-
- spin_unlock(&isi->lock);
- return ret;
-}
-
-#define WAIT_ISI_RESET 1
-#define WAIT_ISI_DISABLE 0
-static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
-{
- unsigned long timeout;
- /*
- * The reset or disable will only succeed if we have a
- * pixel clock from the camera.
- */
- init_completion(&isi->complete);
-
- if (wait_reset) {
- isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST);
- isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST);
- } else {
- isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS);
- isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
- }
-
- timeout = wait_for_completion_timeout(&isi->complete,
- msecs_to_jiffies(500));
- if (timeout == 0)
- return -ETIMEDOUT;
-
- return 0;
-}
-
-/* ------------------------------------------------------------------
- Videobuf operations
- ------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], struct device *alloc_devs[])
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
- unsigned long size;
-
- size = icd->sizeimage;
-
- if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
- *nbuffers = MAX_BUFFER_NUM;
-
- if (size * *nbuffers > VID_LIMIT_BYTES)
- *nbuffers = VID_LIMIT_BYTES / size;
-
- *nplanes = 1;
- sizes[0] = size;
-
- isi->sequence = 0;
- isi->active = NULL;
-
- dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__,
- *nbuffers, size);
-
- return 0;
-}
-
-static int buffer_init(struct vb2_buffer *vb)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
-
- buf->p_dma_desc = NULL;
- INIT_LIST_HEAD(&buf->list);
-
- return 0;
-}
-
-static int buffer_prepare(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 frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
- unsigned long size;
- struct isi_dma_desc *desc;
-
- size = icd->sizeimage;
-
- if (vb2_plane_size(vb, 0) < size) {
- dev_err(icd->parent, "%s data will not fit into plane (%lu < %lu)\n",
- __func__, vb2_plane_size(vb, 0), size);
- return -EINVAL;
- }
-
- vb2_set_plane_payload(vb, 0, size);
-
- if (!buf->p_dma_desc) {
- if (list_empty(&isi->dma_desc_head)) {
- dev_err(icd->parent, "Not enough dma descriptors.\n");
- return -EINVAL;
- } else {
- /* Get an available descriptor */
- desc = list_entry(isi->dma_desc_head.next,
- struct isi_dma_desc, list);
- /* Delete the descriptor since now it is used */
- list_del_init(&desc->list);
-
- /* Initialize the dma descriptor */
- desc->p_fbd->fb_address =
- vb2_dma_contig_plane_dma_addr(vb, 0);
- desc->p_fbd->next_fbd_address = 0;
- set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB);
-
- buf->p_dma_desc = desc;
- }
- }
- return 0;
-}
-
-static void buffer_cleanup(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 atmel_isi *isi = ici->priv;
- struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
-
- /* This descriptor is available now and we add to head list */
- if (buf->p_dma_desc)
- list_add(&buf->p_dma_desc->list, &isi->dma_desc_head);
-}
-
-static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
-{
- u32 ctrl, cfg1;
-
- cfg1 = isi_readl(isi, ISI_CFG1);
- /* Enable irq: cxfr for the codec path, pxfr for the preview path */
- isi_writel(isi, ISI_INTEN,
- ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
-
- /* Check if already in a frame */
- if (!isi->enable_preview_path) {
- if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
- dev_err(isi->soc_host.icd->parent, "Already in frame handling.\n");
- return;
- }
-
- isi_writel(isi, ISI_DMA_C_DSCR,
- (u32)buffer->p_dma_desc->fbd_phys);
- isi_writel(isi, ISI_DMA_C_CTRL,
- ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
- isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
- } else {
- isi_writel(isi, ISI_DMA_P_DSCR,
- (u32)buffer->p_dma_desc->fbd_phys);
- isi_writel(isi, ISI_DMA_P_CTRL,
- ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
- isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
- }
-
- cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK;
- /* Enable linked list */
- cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR;
-
- /* Enable ISI */
- ctrl = ISI_CTRL_EN;
-
- if (!isi->enable_preview_path)
- ctrl |= ISI_CTRL_CDC;
-
- isi_writel(isi, ISI_CTRL, ctrl);
- isi_writel(isi, ISI_CFG1, cfg1);
-}
-
-static void buffer_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 atmel_isi *isi = ici->priv;
- struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
- unsigned long flags = 0;
-
- spin_lock_irqsave(&isi->lock, flags);
- list_add_tail(&buf->list, &isi->video_buffer_list);
-
- if (isi->active == NULL) {
- isi->active = buf;
- if (vb2_is_streaming(vb->vb2_queue))
- start_dma(isi, buf);
- }
- spin_unlock_irqrestore(&isi->lock, flags);
-}
-
-static int start_streaming(struct vb2_queue *vq, unsigned int count)
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
- int ret;
-
- pm_runtime_get_sync(ici->v4l2_dev.dev);
-
- /* Reset ISI */
- ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
- if (ret < 0) {
- dev_err(icd->parent, "Reset ISI timed out\n");
- pm_runtime_put(ici->v4l2_dev.dev);
- return ret;
- }
- /* Disable all interrupts */
- isi_writel(isi, ISI_INTDIS, (u32)~0UL);
-
- configure_geometry(isi, icd->user_width, icd->user_height,
- icd->current_fmt);
-
- spin_lock_irq(&isi->lock);
- /* Clear any pending interrupt */
- isi_readl(isi, ISI_STATUS);
-
- if (count)
- start_dma(isi, isi->active);
- spin_unlock_irq(&isi->lock);
-
- return 0;
-}
-
-/* abort streaming and wait for last buffer */
-static void stop_streaming(struct vb2_queue *vq)
-{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
- struct frame_buffer *buf, *node;
- int ret = 0;
- unsigned long timeout;
-
- spin_lock_irq(&isi->lock);
- isi->active = NULL;
- /* Release all active buffers */
- list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
- list_del_init(&buf->list);
- vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
- }
- spin_unlock_irq(&isi->lock);
-
- if (!isi->enable_preview_path) {
- timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ;
- /* Wait until the end of the current frame. */
- while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&
- time_before(jiffies, timeout))
- msleep(1);
-
- if (time_after(jiffies, timeout))
- dev_err(icd->parent,
- "Timeout waiting for finishing codec request\n");
- }
-
- /* Disable interrupts */
- isi_writel(isi, ISI_INTDIS,
- ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
-
- /* Disable ISI and wait for it is done */
- ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
- if (ret < 0)
- dev_err(icd->parent, "Disable ISI timed out\n");
-
- pm_runtime_put(ici->v4l2_dev.dev);
-}
-
-static const struct vb2_ops isi_video_qops = {
- .queue_setup = queue_setup,
- .buf_init = buffer_init,
- .buf_prepare = buffer_prepare,
- .buf_cleanup = buffer_cleanup,
- .buf_queue = buffer_queue,
- .start_streaming = start_streaming,
- .stop_streaming = stop_streaming,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
-};
-
-/* ------------------------------------------------------------------
- SOC camera operations for the device
- ------------------------------------------------------------------*/
-static int isi_camera_init_videobuf(struct vb2_queue *q,
- struct soc_camera_device *icd)
-{
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
-
- q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- q->io_modes = VB2_MMAP;
- q->drv_priv = icd;
- q->buf_struct_size = sizeof(struct frame_buffer);
- q->ops = &isi_video_qops;
- q->mem_ops = &vb2_dma_contig_memops;
- q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- q->lock = &ici->host_lock;
- q->dev = ici->v4l2_dev.dev;
-
- return vb2_queue_init(q);
-}
-
-static int isi_camera_set_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_format format = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- struct v4l2_mbus_framefmt *mf = &format.format;
- int ret;
-
- /* check with atmel-isi support format, if not support use YUYV */
- if (!is_supported(icd, pix->pixelformat))
- pix->pixelformat = V4L2_PIX_FMT_YUYV;
-
- xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
- if (!xlate) {
- dev_warn(icd->parent, "Format %x not found\n",
- pix->pixelformat);
- return -EINVAL;
- }
-
- dev_dbg(icd->parent, "Plan to set format %dx%d\n",
- pix->width, pix->height);
-
- 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)
- return ret;
-
- 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, "Finally set format %dx%d\n",
- pix->width, pix->height);
-
- return ret;
-}
-
-static int isi_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;
- int ret;
-
- /* check with atmel-isi support format, if not support use YUYV */
- if (!is_supported(icd, pix->pixelformat))
- pix->pixelformat = V4L2_PIX_FMT_YUYV;
-
- 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 Atmel ISI hardware capabilities */
- if (pix->height > MAX_SUPPORT_HEIGHT)
- pix->height = MAX_SUPPORT_HEIGHT;
- if (pix->width > MAX_SUPPORT_WIDTH)
- pix->width = MAX_SUPPORT_WIDTH;
-
- /* 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;
-
- pix->width = mf->width;
- pix->height = mf->height;
- pix->colorspace = mf->colorspace;
-
- switch (mf->field) {
- case V4L2_FIELD_ANY:
- pix->field = V4L2_FIELD_NONE;
- break;
- case V4L2_FIELD_NONE:
- break;
- default:
- dev_err(icd->parent, "Field type %d unsupported.\n",
- mf->field);
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-static const struct soc_mbus_pixelfmt isi_camera_formats[] = {
- {
- .fourcc = V4L2_PIX_FMT_YUYV,
- .name = "Packed YUV422 16 bit",
- .bits_per_sample = 8,
- .packing = SOC_MBUS_PACKING_2X8_PADHI,
- .order = SOC_MBUS_ORDER_LE,
- .layout = SOC_MBUS_LAYOUT_PACKED,
- },
- {
- .fourcc = V4L2_PIX_FMT_RGB565,
- .name = "RGB565",
- .bits_per_sample = 8,
- .packing = SOC_MBUS_PACKING_2X8_PADHI,
- .order = SOC_MBUS_ORDER_LE,
- .layout = SOC_MBUS_LAYOUT_PACKED,
- },
-};
-
-/* This will be corrected as we get more formats */
-static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
-{
- return fmt->packing == SOC_MBUS_PACKING_NONE ||
- (fmt->bits_per_sample == 8 &&
- fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
- (fmt->bits_per_sample > 8 &&
- fmt->packing == SOC_MBUS_PACKING_EXTEND16);
-}
-
-#define ISI_BUS_PARAM (V4L2_MBUS_MASTER | \
- V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
- V4L2_MBUS_HSYNC_ACTIVE_LOW | \
- V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
- V4L2_MBUS_VSYNC_ACTIVE_LOW | \
- V4L2_MBUS_PCLK_SAMPLE_RISING | \
- V4L2_MBUS_PCLK_SAMPLE_FALLING | \
- V4L2_MBUS_DATA_ACTIVE_HIGH)
-
-static int isi_camera_try_bus_param(struct soc_camera_device *icd,
- unsigned char buswidth)
-{
- struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- unsigned long common_flags;
- int ret;
-
- ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = soc_mbus_config_compatible(&cfg,
- ISI_BUS_PARAM);
- if (!common_flags) {
- dev_warn(icd->parent,
- "Flags incompatible: camera 0x%x, host 0x%x\n",
- cfg.flags, ISI_BUS_PARAM);
- return -EINVAL;
- }
- } else if (ret != -ENOIOCTLCMD) {
- return ret;
- }
-
- if ((1 << (buswidth - 1)) & isi->width_flags)
- return 0;
- return -EINVAL;
-}
-
-
-static int isi_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);
- int formats = 0, ret, i, n;
- /* sensor format */
- struct v4l2_subdev_mbus_code_enum code = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- .index = idx,
- };
- /* soc camera host format */
- const struct soc_mbus_pixelfmt *fmt;
-
- 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(icd->parent,
- "Invalid format code #%u: %d\n", idx, code.code);
- return 0;
- }
-
- /* This also checks support for the requested bits-per-sample */
- ret = isi_camera_try_bus_param(icd, fmt->bits_per_sample);
- if (ret < 0) {
- dev_err(icd->parent,
- "Fail to try the bus parameters.\n");
- return 0;
- }
-
- switch (code.code) {
- case MEDIA_BUS_FMT_UYVY8_2X8:
- case MEDIA_BUS_FMT_VYUY8_2X8:
- case MEDIA_BUS_FMT_YUYV8_2X8:
- case MEDIA_BUS_FMT_YVYU8_2X8:
- n = ARRAY_SIZE(isi_camera_formats);
- formats += n;
- for (i = 0; xlate && i < n; i++, xlate++) {
- xlate->host_fmt = &isi_camera_formats[i];
- xlate->code = code.code;
- dev_dbg(icd->parent, "Providing format %s using code %d\n",
- xlate->host_fmt->name, xlate->code);
- }
- break;
- default:
- if (!isi_camera_packing_supported(fmt))
- return 0;
- if (xlate)
- dev_dbg(icd->parent,
- "Providing format %s in pass-through mode\n",
- fmt->name);
- }
-
- /* Generic pass-through */
- formats++;
- if (xlate) {
- xlate->host_fmt = fmt;
- xlate->code = code.code;
- xlate++;
- }
-
- return formats;
-}
-
-static int isi_camera_add_device(struct soc_camera_device *icd)
-{
- dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
- icd->devnum);
-
- return 0;
-}
-
-static void isi_camera_remove_device(struct soc_camera_device *icd)
-{
- dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
- icd->devnum);
-}
-
-static unsigned int isi_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 int isi_camera_querycap(struct soc_camera_host *ici,
- struct v4l2_capability *cap)
-{
- strcpy(cap->driver, "atmel-isi");
- strcpy(cap->card, "Atmel Image Sensor Interface");
- cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
- cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
-
- return 0;
-}
-
-static int isi_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 atmel_isi *isi = ici->priv;
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- unsigned long common_flags;
- int ret;
- u32 cfg1 = 0;
-
- ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = soc_mbus_config_compatible(&cfg,
- ISI_BUS_PARAM);
- if (!common_flags) {
- dev_warn(icd->parent,
- "Flags incompatible: camera 0x%x, host 0x%x\n",
- cfg.flags, ISI_BUS_PARAM);
- return -EINVAL;
- }
- } else if (ret != -ENOIOCTLCMD) {
- return ret;
- } else {
- common_flags = ISI_BUS_PARAM;
- }
- dev_dbg(icd->parent, "Flags cam: 0x%x host: 0x%x common: 0x%lx\n",
- cfg.flags, ISI_BUS_PARAM, common_flags);
-
- /* Make choises, based on platform preferences */
- if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
- if (isi->pdata.hsync_act_low)
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
- }
-
- if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
- if (isi->pdata.vsync_act_low)
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
- }
-
- if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
- (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
- if (isi->pdata.pclk_act_falling)
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
- else
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
- }
-
- 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;
- }
-
- /* set bus param for ISI */
- if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
- cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
- if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
- cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
- if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
- cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
-
- dev_dbg(icd->parent, "vsync active %s, hsync active %s, sampling on pix clock %s edge\n",
- common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? "low" : "high",
- common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? "low" : "high",
- common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING ? "falling" : "rising");
-
- if (isi->pdata.has_emb_sync)
- cfg1 |= ISI_CFG1_EMB_SYNC;
- if (isi->pdata.full_mode)
- cfg1 |= ISI_CFG1_FULL_MODE;
-
- cfg1 |= ISI_CFG1_THMASK_BEATS_16;
-
- /* Enable PM and peripheral clock before operate isi registers */
- pm_runtime_get_sync(ici->v4l2_dev.dev);
-
- isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
- isi_writel(isi, ISI_CFG1, cfg1);
-
- pm_runtime_put(ici->v4l2_dev.dev);
-
- return 0;
-}
-
-static struct soc_camera_host_ops isi_soc_camera_host_ops = {
- .owner = THIS_MODULE,
- .add = isi_camera_add_device,
- .remove = isi_camera_remove_device,
- .set_fmt = isi_camera_set_fmt,
- .try_fmt = isi_camera_try_fmt,
- .get_formats = isi_camera_get_formats,
- .init_videobuf2 = isi_camera_init_videobuf,
- .poll = isi_camera_poll,
- .querycap = isi_camera_querycap,
- .set_bus_param = isi_camera_set_bus_param,
-};
-
-/* -----------------------------------------------------------------------*/
-static int atmel_isi_remove(struct platform_device *pdev)
-{
- struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
- struct atmel_isi *isi = container_of(soc_host,
- struct atmel_isi, soc_host);
-
- soc_camera_host_unregister(soc_host);
- dma_free_coherent(&pdev->dev,
- sizeof(struct fbd) * MAX_BUFFER_NUM,
- isi->p_fb_descriptors,
- isi->fb_descriptors_phys);
- pm_runtime_disable(&pdev->dev);
-
- return 0;
-}
-
-static int atmel_isi_parse_dt(struct atmel_isi *isi,
- struct platform_device *pdev)
-{
- struct device_node *np= pdev->dev.of_node;
- struct v4l2_of_endpoint ep;
- int err;
-
- /* Default settings for ISI */
- isi->pdata.full_mode = 1;
- isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
-
- np = of_graph_get_next_endpoint(np, NULL);
- if (!np) {
- dev_err(&pdev->dev, "Could not find the endpoint\n");
- return -EINVAL;
- }
-
- err = v4l2_of_parse_endpoint(np, &ep);
- of_node_put(np);
- if (err) {
- dev_err(&pdev->dev, "Could not parse the endpoint\n");
- return err;
- }
-
- switch (ep.bus.parallel.bus_width) {
- case 8:
- isi->pdata.data_width_flags = ISI_DATAWIDTH_8;
- break;
- case 10:
- isi->pdata.data_width_flags =
- ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10;
- break;
- default:
- dev_err(&pdev->dev, "Unsupported bus width: %d\n",
- ep.bus.parallel.bus_width);
- return -EINVAL;
- }
-
- if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
- isi->pdata.hsync_act_low = true;
- if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
- isi->pdata.vsync_act_low = true;
- if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
- isi->pdata.pclk_act_falling = true;
-
- if (ep.bus_type == V4L2_MBUS_BT656)
- isi->pdata.has_emb_sync = true;
-
- return 0;
-}
-
-static int atmel_isi_probe(struct platform_device *pdev)
-{
- int irq;
- struct atmel_isi *isi;
- struct resource *regs;
- int ret, i;
- struct soc_camera_host *soc_host;
-
- isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
- if (!isi) {
- dev_err(&pdev->dev, "Can't allocate interface!\n");
- return -ENOMEM;
- }
-
- isi->pclk = devm_clk_get(&pdev->dev, "isi_clk");
- if (IS_ERR(isi->pclk))
- return PTR_ERR(isi->pclk);
-
- ret = atmel_isi_parse_dt(isi, pdev);
- if (ret)
- return ret;
-
- isi->active = NULL;
- spin_lock_init(&isi->lock);
- INIT_LIST_HEAD(&isi->video_buffer_list);
- INIT_LIST_HEAD(&isi->dma_desc_head);
-
- isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
- sizeof(struct fbd) * MAX_BUFFER_NUM,
- &isi->fb_descriptors_phys,
- GFP_KERNEL);
- if (!isi->p_fb_descriptors) {
- dev_err(&pdev->dev, "Can't allocate descriptors!\n");
- return -ENOMEM;
- }
-
- for (i = 0; i < MAX_BUFFER_NUM; i++) {
- isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i;
- isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys +
- i * sizeof(struct fbd);
- list_add(&isi->dma_desc[i].list, &isi->dma_desc_head);
- }
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- isi->regs = devm_ioremap_resource(&pdev->dev, regs);
- if (IS_ERR(isi->regs)) {
- ret = PTR_ERR(isi->regs);
- goto err_ioremap;
- }
-
- if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8)
- isi->width_flags = 1 << 7;
- if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10)
- isi->width_flags |= 1 << 9;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- ret = irq;
- goto err_req_irq;
- }
-
- ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi);
- if (ret) {
- dev_err(&pdev->dev, "Unable to request irq %d\n", irq);
- goto err_req_irq;
- }
- isi->irq = irq;
-
- soc_host = &isi->soc_host;
- soc_host->drv_name = "isi-camera";
- soc_host->ops = &isi_soc_camera_host_ops;
- soc_host->priv = isi;
- soc_host->v4l2_dev.dev = &pdev->dev;
- soc_host->nr = pdev->id;
-
- pm_suspend_ignore_children(&pdev->dev, true);
- pm_runtime_enable(&pdev->dev);
-
- ret = soc_camera_host_register(soc_host);
- if (ret) {
- dev_err(&pdev->dev, "Unable to register soc camera host\n");
- goto err_register_soc_camera_host;
- }
- return 0;
-
-err_register_soc_camera_host:
- pm_runtime_disable(&pdev->dev);
-err_req_irq:
-err_ioremap:
- dma_free_coherent(&pdev->dev,
- sizeof(struct fbd) * MAX_BUFFER_NUM,
- isi->p_fb_descriptors,
- isi->fb_descriptors_phys);
-
- return ret;
-}
-
-#ifdef CONFIG_PM
-static int atmel_isi_runtime_suspend(struct device *dev)
-{
- struct soc_camera_host *soc_host = to_soc_camera_host(dev);
- struct atmel_isi *isi = container_of(soc_host,
- struct atmel_isi, soc_host);
-
- clk_disable_unprepare(isi->pclk);
-
- return 0;
-}
-static int atmel_isi_runtime_resume(struct device *dev)
-{
- struct soc_camera_host *soc_host = to_soc_camera_host(dev);
- struct atmel_isi *isi = container_of(soc_host,
- struct atmel_isi, soc_host);
-
- return clk_prepare_enable(isi->pclk);
-}
-#endif /* CONFIG_PM */
-
-static const struct dev_pm_ops atmel_isi_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend,
- atmel_isi_runtime_resume, NULL)
-};
-
-static const struct of_device_id atmel_isi_of_match[] = {
- { .compatible = "atmel,at91sam9g45-isi" },
- { }
-};
-MODULE_DEVICE_TABLE(of, atmel_isi_of_match);
-
-static struct platform_driver atmel_isi_driver = {
- .remove = atmel_isi_remove,
- .driver = {
- .name = "atmel_isi",
- .of_match_table = of_match_ptr(atmel_isi_of_match),
- .pm = &atmel_isi_dev_pm_ops,
- },
-};
-
-module_platform_driver_probe(atmel_isi_driver, atmel_isi_probe);
-
-MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
-MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("video");