// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2011 Atmel Corporation
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* Josh Wu, <josh.wu@atmel.com>
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*
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* Based on previous work by Lars Haring, <lars.haring@atmel.com>
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* and Sedji Gaouaou
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* Based on the bttv driver for Bt848 with respective copyright holders
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*/
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#include <linux/clk.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-fwnode.h>
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#include <media/videobuf2-dma-contig.h>
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#include <media/v4l2-image-sizes.h>
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#include "atmel-isi.h"
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#define MAX_SUPPORT_WIDTH 2048U
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#define MAX_SUPPORT_HEIGHT 2048U
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#define MIN_FRAME_RATE 15
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#define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
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/* Frame buffer descriptor */
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struct fbd {
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/* Physical address of the frame buffer */
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u32 fb_address;
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/* DMA Control Register(only in HISI2) */
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u32 dma_ctrl;
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/* Physical address of the next fbd */
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u32 next_fbd_address;
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};
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static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
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{
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fb_desc->dma_ctrl = ctrl;
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}
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struct isi_dma_desc {
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struct list_head list;
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struct fbd *p_fbd;
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dma_addr_t fbd_phys;
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};
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/* Frame buffer data */
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struct frame_buffer {
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struct vb2_v4l2_buffer vb;
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struct isi_dma_desc *p_dma_desc;
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struct list_head list;
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};
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struct isi_graph_entity {
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struct device_node *node;
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struct v4l2_async_subdev asd;
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struct v4l2_subdev *subdev;
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};
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/*
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* struct isi_format - ISI media bus format information
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* @fourcc: Fourcc code for this format
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* @mbus_code: V4L2 media bus format code.
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* @bpp: Bytes per pixel (when stored in memory)
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* @swap: Byte swap configuration value
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* @support: Indicates format supported by subdev
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* @skip: Skip duplicate format supported by subdev
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*/
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struct isi_format {
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u32 fourcc;
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u32 mbus_code;
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u8 bpp;
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u32 swap;
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};
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|
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struct atmel_isi {
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/* Protects the access of variables shared with the ISR */
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spinlock_t irqlock;
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struct device *dev;
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void __iomem *regs;
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int sequence;
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/* Allocate descriptors for dma buffer use */
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struct fbd *p_fb_descriptors;
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dma_addr_t fb_descriptors_phys;
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struct list_head dma_desc_head;
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struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME];
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bool enable_preview_path;
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struct completion complete;
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/* ISI peripheral clock */
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struct clk *pclk;
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unsigned int irq;
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struct isi_platform_data pdata;
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u16 width_flags; /* max 12 bits */
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struct list_head video_buffer_list;
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struct frame_buffer *active;
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struct v4l2_device v4l2_dev;
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struct video_device *vdev;
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struct v4l2_async_notifier notifier;
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struct isi_graph_entity entity;
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struct v4l2_format fmt;
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const struct isi_format **user_formats;
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unsigned int num_user_formats;
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const struct isi_format *current_fmt;
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struct mutex lock;
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struct vb2_queue queue;
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};
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#define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier)
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static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
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{
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writel(val, isi->regs + reg);
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}
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static u32 isi_readl(struct atmel_isi *isi, u32 reg)
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{
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return readl(isi->regs + reg);
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}
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static void configure_geometry(struct atmel_isi *isi)
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{
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u32 cfg2, psize;
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u32 fourcc = isi->current_fmt->fourcc;
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isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 ||
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fourcc == V4L2_PIX_FMT_RGB32 ||
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fourcc == V4L2_PIX_FMT_Y16;
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/* According to sensor's output format to set cfg2 */
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cfg2 = isi->current_fmt->swap;
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isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
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/* Set width */
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cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
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ISI_CFG2_IM_HSIZE_MASK;
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/* Set height */
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cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
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& ISI_CFG2_IM_VSIZE_MASK;
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isi_writel(isi, ISI_CFG2, cfg2);
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/* No down sampling, preview size equal to sensor output size */
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psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
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ISI_PSIZE_PREV_HSIZE_MASK;
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psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
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ISI_PSIZE_PREV_VSIZE_MASK;
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isi_writel(isi, ISI_PSIZE, psize);
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isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING);
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}
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static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
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{
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if (isi->active) {
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struct vb2_v4l2_buffer *vbuf = &isi->active->vb;
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struct frame_buffer *buf = isi->active;
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list_del_init(&buf->list);
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vbuf->vb2_buf.timestamp = ktime_get_ns();
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vbuf->sequence = isi->sequence++;
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vbuf->field = V4L2_FIELD_NONE;
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vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
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}
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if (list_empty(&isi->video_buffer_list)) {
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isi->active = NULL;
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} else {
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/* start next dma frame. */
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isi->active = list_entry(isi->video_buffer_list.next,
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struct frame_buffer, list);
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if (!isi->enable_preview_path) {
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isi_writel(isi, ISI_DMA_C_DSCR,
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(u32)isi->active->p_dma_desc->fbd_phys);
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isi_writel(isi, ISI_DMA_C_CTRL,
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ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
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isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
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} else {
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isi_writel(isi, ISI_DMA_P_DSCR,
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(u32)isi->active->p_dma_desc->fbd_phys);
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isi_writel(isi, ISI_DMA_P_CTRL,
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ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
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isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
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}
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}
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return IRQ_HANDLED;
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}
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/* ISI interrupt service routine */
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static irqreturn_t isi_interrupt(int irq, void *dev_id)
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{
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struct atmel_isi *isi = dev_id;
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u32 status, mask, pending;
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irqreturn_t ret = IRQ_NONE;
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spin_lock(&isi->irqlock);
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status = isi_readl(isi, ISI_STATUS);
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mask = isi_readl(isi, ISI_INTMASK);
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pending = status & mask;
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if (pending & ISI_CTRL_SRST) {
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complete(&isi->complete);
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isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST);
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ret = IRQ_HANDLED;
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} else if (pending & ISI_CTRL_DIS) {
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complete(&isi->complete);
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isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS);
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ret = IRQ_HANDLED;
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} else {
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if (likely(pending & ISI_SR_CXFR_DONE) ||
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likely(pending & ISI_SR_PXFR_DONE))
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ret = atmel_isi_handle_streaming(isi);
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}
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spin_unlock(&isi->irqlock);
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return ret;
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}
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#define WAIT_ISI_RESET 1
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#define WAIT_ISI_DISABLE 0
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static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
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{
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unsigned long timeout;
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/*
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* The reset or disable will only succeed if we have a
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* pixel clock from the camera.
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*/
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init_completion(&isi->complete);
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if (wait_reset) {
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isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST);
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isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST);
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} else {
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isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS);
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isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
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}
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timeout = wait_for_completion_timeout(&isi->complete,
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msecs_to_jiffies(500));
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if (timeout == 0)
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return -ETIMEDOUT;
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return 0;
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}
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/* ------------------------------------------------------------------
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Videobuf operations
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------------------------------------------------------------------*/
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static int queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct atmel_isi *isi = vb2_get_drv_priv(vq);
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unsigned long size;
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size = isi->fmt.fmt.pix.sizeimage;
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/* Make sure the image size is large enough. */
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if (*nplanes)
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return sizes[0] < size ? -EINVAL : 0;
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*nplanes = 1;
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sizes[0] = size;
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isi->active = NULL;
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dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
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*nbuffers, size);
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return 0;
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}
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static int buffer_init(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
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buf->p_dma_desc = NULL;
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INIT_LIST_HEAD(&buf->list);
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return 0;
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}
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static int buffer_prepare(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
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struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
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unsigned long size;
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struct isi_dma_desc *desc;
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size = isi->fmt.fmt.pix.sizeimage;
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if (vb2_plane_size(vb, 0) < size) {
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dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n",
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__func__, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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if (!buf->p_dma_desc) {
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if (list_empty(&isi->dma_desc_head)) {
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dev_err(isi->dev, "Not enough dma descriptors.\n");
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return -EINVAL;
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} else {
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/* Get an available descriptor */
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desc = list_entry(isi->dma_desc_head.next,
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struct isi_dma_desc, list);
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/* Delete the descriptor since now it is used */
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list_del_init(&desc->list);
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/* Initialize the dma descriptor */
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desc->p_fbd->fb_address =
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vb2_dma_contig_plane_dma_addr(vb, 0);
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desc->p_fbd->next_fbd_address = 0;
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set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB);
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buf->p_dma_desc = desc;
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}
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}
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return 0;
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}
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static void buffer_cleanup(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
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struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
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/* This descriptor is available now and we add to head list */
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if (buf->p_dma_desc)
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list_add(&buf->p_dma_desc->list, &isi->dma_desc_head);
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}
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static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
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{
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u32 ctrl, cfg1;
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cfg1 = isi_readl(isi, ISI_CFG1);
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/* Enable irq: cxfr for the codec path, pxfr for the preview path */
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isi_writel(isi, ISI_INTEN,
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ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
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/* Check if already in a frame */
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if (!isi->enable_preview_path) {
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if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
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dev_err(isi->dev, "Already in frame handling.\n");
|
return;
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}
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isi_writel(isi, ISI_DMA_C_DSCR,
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(u32)buffer->p_dma_desc->fbd_phys);
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isi_writel(isi, ISI_DMA_C_CTRL,
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ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
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isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
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} else {
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isi_writel(isi, ISI_DMA_P_DSCR,
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(u32)buffer->p_dma_desc->fbd_phys);
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isi_writel(isi, ISI_DMA_P_CTRL,
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ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
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isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
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}
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cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK;
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/* Enable linked list */
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cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR;
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/* Enable ISI */
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ctrl = ISI_CTRL_EN;
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if (!isi->enable_preview_path)
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ctrl |= ISI_CTRL_CDC;
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isi_writel(isi, ISI_CTRL, ctrl);
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isi_writel(isi, ISI_CFG1, cfg1);
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}
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static void buffer_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
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struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
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unsigned long flags = 0;
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spin_lock_irqsave(&isi->irqlock, flags);
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list_add_tail(&buf->list, &isi->video_buffer_list);
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|
if (!isi->active) {
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isi->active = buf;
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if (vb2_is_streaming(vb->vb2_queue))
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start_dma(isi, buf);
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}
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spin_unlock_irqrestore(&isi->irqlock, flags);
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}
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static int start_streaming(struct vb2_queue *vq, unsigned int count)
|
{
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struct atmel_isi *isi = vb2_get_drv_priv(vq);
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struct frame_buffer *buf, *node;
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int ret;
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pm_runtime_get_sync(isi->dev);
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/* Enable stream on the sub device */
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ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1);
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if (ret && ret != -ENOIOCTLCMD) {
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dev_err(isi->dev, "stream on failed in subdev\n");
|
goto err_start_stream;
|
}
|
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/* Reset ISI */
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ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
|
if (ret < 0) {
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dev_err(isi->dev, "Reset ISI timed out\n");
|
goto err_reset;
|
}
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/* Disable all interrupts */
|
isi_writel(isi, ISI_INTDIS, (u32)~0UL);
|
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isi->sequence = 0;
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configure_geometry(isi);
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spin_lock_irq(&isi->irqlock);
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/* Clear any pending interrupt */
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isi_readl(isi, ISI_STATUS);
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start_dma(isi, isi->active);
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spin_unlock_irq(&isi->irqlock);
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return 0;
|
|
err_reset:
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v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
|
|
err_start_stream:
|
pm_runtime_put(isi->dev);
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spin_lock_irq(&isi->irqlock);
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isi->active = NULL;
|
/* Release all active buffers */
|
list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
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list_del_init(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
|
}
|
spin_unlock_irq(&isi->irqlock);
|
|
return ret;
|
}
|
|
/* abort streaming and wait for last buffer */
|
static void stop_streaming(struct vb2_queue *vq)
|
{
|
struct atmel_isi *isi = vb2_get_drv_priv(vq);
|
struct frame_buffer *buf, *node;
|
int ret = 0;
|
unsigned long timeout;
|
|
/* Disable stream on the sub device */
|
ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
|
if (ret && ret != -ENOIOCTLCMD)
|
dev_err(isi->dev, "stream off failed in subdev\n");
|
|
spin_lock_irq(&isi->irqlock);
|
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->irqlock);
|
|
if (!isi->enable_preview_path) {
|
timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000;
|
/* 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(isi->dev,
|
"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(isi->dev, "Disable ISI timed out\n");
|
|
pm_runtime_put(isi->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,
|
};
|
|
static int isi_g_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *fmt)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
*fmt = isi->fmt;
|
|
return 0;
|
}
|
|
static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi,
|
unsigned int fourcc)
|
{
|
unsigned int num_formats = isi->num_user_formats;
|
const struct isi_format *fmt;
|
unsigned int i;
|
|
for (i = 0; i < num_formats; i++) {
|
fmt = isi->user_formats[i];
|
if (fmt->fourcc == fourcc)
|
return fmt;
|
}
|
|
return NULL;
|
}
|
|
static void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt,
|
struct v4l2_subdev_pad_config *pad_cfg)
|
{
|
int ret;
|
struct v4l2_subdev_frame_size_enum fse = {
|
.code = isi_fmt->mbus_code,
|
.which = V4L2_SUBDEV_FORMAT_TRY,
|
};
|
|
ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
|
pad_cfg, &fse);
|
/*
|
* Attempt to obtain format size from subdev. If not available,
|
* just use the maximum ISI can receive.
|
*/
|
if (ret) {
|
pad_cfg->try_crop.width = MAX_SUPPORT_WIDTH;
|
pad_cfg->try_crop.height = MAX_SUPPORT_HEIGHT;
|
} else {
|
pad_cfg->try_crop.width = fse.max_width;
|
pad_cfg->try_crop.height = fse.max_height;
|
}
|
}
|
|
static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f,
|
const struct isi_format **current_fmt)
|
{
|
const struct isi_format *isi_fmt;
|
struct v4l2_pix_format *pixfmt = &f->fmt.pix;
|
struct v4l2_subdev_pad_config pad_cfg = {};
|
struct v4l2_subdev_format format = {
|
.which = V4L2_SUBDEV_FORMAT_TRY,
|
};
|
int ret;
|
|
isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat);
|
if (!isi_fmt) {
|
isi_fmt = isi->user_formats[isi->num_user_formats - 1];
|
pixfmt->pixelformat = isi_fmt->fourcc;
|
}
|
|
/* Limit to Atmel ISI hardware capabilities */
|
pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH);
|
pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT);
|
|
v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code);
|
|
isi_try_fse(isi, isi_fmt, &pad_cfg);
|
|
ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt,
|
&pad_cfg, &format);
|
if (ret < 0)
|
return ret;
|
|
v4l2_fill_pix_format(pixfmt, &format.format);
|
|
pixfmt->field = V4L2_FIELD_NONE;
|
pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp;
|
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
|
|
if (current_fmt)
|
*current_fmt = isi_fmt;
|
|
return 0;
|
}
|
|
static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f)
|
{
|
struct v4l2_subdev_format format = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
const struct isi_format *current_fmt;
|
int ret;
|
|
ret = isi_try_fmt(isi, f, ¤t_fmt);
|
if (ret)
|
return ret;
|
|
v4l2_fill_mbus_format(&format.format, &f->fmt.pix,
|
current_fmt->mbus_code);
|
ret = v4l2_subdev_call(isi->entity.subdev, pad,
|
set_fmt, NULL, &format);
|
if (ret < 0)
|
return ret;
|
|
isi->fmt = *f;
|
isi->current_fmt = current_fmt;
|
|
return 0;
|
}
|
|
static int isi_s_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *f)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
if (vb2_is_streaming(&isi->queue))
|
return -EBUSY;
|
|
return isi_set_fmt(isi, f);
|
}
|
|
static int isi_try_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_format *f)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
return isi_try_fmt(isi, f, NULL);
|
}
|
|
static int isi_enum_fmt_vid_cap(struct file *file, void *priv,
|
struct v4l2_fmtdesc *f)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
if (f->index >= isi->num_user_formats)
|
return -EINVAL;
|
|
f->pixelformat = isi->user_formats[f->index]->fourcc;
|
return 0;
|
}
|
|
static int isi_querycap(struct file *file, void *priv,
|
struct v4l2_capability *cap)
|
{
|
strscpy(cap->driver, "atmel-isi", sizeof(cap->driver));
|
strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card));
|
strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info));
|
return 0;
|
}
|
|
static int isi_enum_input(struct file *file, void *priv,
|
struct v4l2_input *i)
|
{
|
if (i->index != 0)
|
return -EINVAL;
|
|
i->type = V4L2_INPUT_TYPE_CAMERA;
|
strscpy(i->name, "Camera", sizeof(i->name));
|
return 0;
|
}
|
|
static int isi_g_input(struct file *file, void *priv, unsigned int *i)
|
{
|
*i = 0;
|
return 0;
|
}
|
|
static int isi_s_input(struct file *file, void *priv, unsigned int i)
|
{
|
if (i > 0)
|
return -EINVAL;
|
return 0;
|
}
|
|
static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a);
|
}
|
|
static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
|
return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a);
|
}
|
|
static int isi_enum_framesizes(struct file *file, void *fh,
|
struct v4l2_frmsizeenum *fsize)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
const struct isi_format *isi_fmt;
|
struct v4l2_subdev_frame_size_enum fse = {
|
.index = fsize->index,
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
int ret;
|
|
isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format);
|
if (!isi_fmt)
|
return -EINVAL;
|
|
fse.code = isi_fmt->mbus_code;
|
|
ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
|
NULL, &fse);
|
if (ret)
|
return ret;
|
|
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
fsize->discrete.width = fse.max_width;
|
fsize->discrete.height = fse.max_height;
|
|
return 0;
|
}
|
|
static int isi_enum_frameintervals(struct file *file, void *fh,
|
struct v4l2_frmivalenum *fival)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
const struct isi_format *isi_fmt;
|
struct v4l2_subdev_frame_interval_enum fie = {
|
.index = fival->index,
|
.width = fival->width,
|
.height = fival->height,
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
int ret;
|
|
isi_fmt = find_format_by_fourcc(isi, fival->pixel_format);
|
if (!isi_fmt)
|
return -EINVAL;
|
|
fie.code = isi_fmt->mbus_code;
|
|
ret = v4l2_subdev_call(isi->entity.subdev, pad,
|
enum_frame_interval, NULL, &fie);
|
if (ret)
|
return ret;
|
|
fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
|
fival->discrete = fie.interval;
|
|
return 0;
|
}
|
|
static void isi_camera_set_bus_param(struct atmel_isi *isi)
|
{
|
u32 cfg1 = 0;
|
|
/* set bus param for ISI */
|
if (isi->pdata.hsync_act_low)
|
cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
|
if (isi->pdata.vsync_act_low)
|
cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
|
if (isi->pdata.pclk_act_falling)
|
cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
|
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(isi->dev);
|
|
isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
|
isi_writel(isi, ISI_CFG1, cfg1);
|
|
pm_runtime_put(isi->dev);
|
}
|
|
/* -----------------------------------------------------------------------*/
|
static int atmel_isi_parse_dt(struct atmel_isi *isi,
|
struct platform_device *pdev)
|
{
|
struct device_node *np = pdev->dev.of_node;
|
struct v4l2_fwnode_endpoint ep = { .bus_type = 0 };
|
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_fwnode_endpoint_parse(of_fwnode_handle(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 isi_open(struct file *file)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
struct v4l2_subdev *sd = isi->entity.subdev;
|
int ret;
|
|
if (mutex_lock_interruptible(&isi->lock))
|
return -ERESTARTSYS;
|
|
ret = v4l2_fh_open(file);
|
if (ret < 0)
|
goto unlock;
|
|
if (!v4l2_fh_is_singular_file(file))
|
goto fh_rel;
|
|
ret = v4l2_subdev_call(sd, core, s_power, 1);
|
if (ret < 0 && ret != -ENOIOCTLCMD)
|
goto fh_rel;
|
|
ret = isi_set_fmt(isi, &isi->fmt);
|
if (ret)
|
v4l2_subdev_call(sd, core, s_power, 0);
|
fh_rel:
|
if (ret)
|
v4l2_fh_release(file);
|
unlock:
|
mutex_unlock(&isi->lock);
|
return ret;
|
}
|
|
static int isi_release(struct file *file)
|
{
|
struct atmel_isi *isi = video_drvdata(file);
|
struct v4l2_subdev *sd = isi->entity.subdev;
|
bool fh_singular;
|
int ret;
|
|
mutex_lock(&isi->lock);
|
|
fh_singular = v4l2_fh_is_singular_file(file);
|
|
ret = _vb2_fop_release(file, NULL);
|
|
if (fh_singular)
|
v4l2_subdev_call(sd, core, s_power, 0);
|
|
mutex_unlock(&isi->lock);
|
|
return ret;
|
}
|
|
static const struct v4l2_ioctl_ops isi_ioctl_ops = {
|
.vidioc_querycap = isi_querycap,
|
|
.vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap,
|
.vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap,
|
.vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap,
|
.vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap,
|
|
.vidioc_enum_input = isi_enum_input,
|
.vidioc_g_input = isi_g_input,
|
.vidioc_s_input = isi_s_input,
|
|
.vidioc_g_parm = isi_g_parm,
|
.vidioc_s_parm = isi_s_parm,
|
.vidioc_enum_framesizes = isi_enum_framesizes,
|
.vidioc_enum_frameintervals = isi_enum_frameintervals,
|
|
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
.vidioc_querybuf = vb2_ioctl_querybuf,
|
.vidioc_qbuf = vb2_ioctl_qbuf,
|
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
.vidioc_expbuf = vb2_ioctl_expbuf,
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
|
.vidioc_streamon = vb2_ioctl_streamon,
|
.vidioc_streamoff = vb2_ioctl_streamoff,
|
|
.vidioc_log_status = v4l2_ctrl_log_status,
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
};
|
|
static const struct v4l2_file_operations isi_fops = {
|
.owner = THIS_MODULE,
|
.unlocked_ioctl = video_ioctl2,
|
.open = isi_open,
|
.release = isi_release,
|
.poll = vb2_fop_poll,
|
.mmap = vb2_fop_mmap,
|
.read = vb2_fop_read,
|
};
|
|
static int isi_set_default_fmt(struct atmel_isi *isi)
|
{
|
struct v4l2_format f = {
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
.fmt.pix = {
|
.width = VGA_WIDTH,
|
.height = VGA_HEIGHT,
|
.field = V4L2_FIELD_NONE,
|
.pixelformat = isi->user_formats[0]->fourcc,
|
},
|
};
|
int ret;
|
|
ret = isi_try_fmt(isi, &f, NULL);
|
if (ret)
|
return ret;
|
isi->current_fmt = isi->user_formats[0];
|
isi->fmt = f;
|
return 0;
|
}
|
|
static const struct isi_format isi_formats[] = {
|
{
|
.fourcc = V4L2_PIX_FMT_YUYV,
|
.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_DEFAULT,
|
}, {
|
.fourcc = V4L2_PIX_FMT_YUYV,
|
.mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_1,
|
}, {
|
.fourcc = V4L2_PIX_FMT_YUYV,
|
.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_2,
|
}, {
|
.fourcc = V4L2_PIX_FMT_YUYV,
|
.mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_3,
|
}, {
|
.fourcc = V4L2_PIX_FMT_RGB565,
|
.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_2,
|
}, {
|
.fourcc = V4L2_PIX_FMT_RGB565,
|
.mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_3,
|
}, {
|
.fourcc = V4L2_PIX_FMT_RGB565,
|
.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_DEFAULT,
|
}, {
|
.fourcc = V4L2_PIX_FMT_RGB565,
|
.mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
|
.bpp = 2,
|
.swap = ISI_CFG2_YCC_SWAP_MODE_1,
|
}, {
|
.fourcc = V4L2_PIX_FMT_GREY,
|
.mbus_code = MEDIA_BUS_FMT_Y10_1X10,
|
.bpp = 1,
|
.swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE,
|
}, {
|
.fourcc = V4L2_PIX_FMT_Y16,
|
.mbus_code = MEDIA_BUS_FMT_Y10_1X10,
|
.bpp = 2,
|
.swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE,
|
},
|
};
|
|
static int isi_formats_init(struct atmel_isi *isi)
|
{
|
const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)];
|
unsigned int num_fmts = 0, i, j;
|
struct v4l2_subdev *subdev = isi->entity.subdev;
|
struct v4l2_subdev_mbus_code_enum mbus_code = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
};
|
|
while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
|
NULL, &mbus_code)) {
|
for (i = 0; i < ARRAY_SIZE(isi_formats); i++) {
|
if (isi_formats[i].mbus_code != mbus_code.code)
|
continue;
|
|
/* Code supported, have we got this fourcc yet? */
|
for (j = 0; j < num_fmts; j++)
|
if (isi_fmts[j]->fourcc == isi_formats[i].fourcc)
|
/* Already available */
|
break;
|
if (j == num_fmts)
|
/* new */
|
isi_fmts[num_fmts++] = isi_formats + i;
|
}
|
mbus_code.index++;
|
}
|
|
if (!num_fmts)
|
return -ENXIO;
|
|
isi->num_user_formats = num_fmts;
|
isi->user_formats = devm_kcalloc(isi->dev,
|
num_fmts, sizeof(struct isi_format *),
|
GFP_KERNEL);
|
if (!isi->user_formats)
|
return -ENOMEM;
|
|
memcpy(isi->user_formats, isi_fmts,
|
num_fmts * sizeof(struct isi_format *));
|
isi->current_fmt = isi->user_formats[0];
|
|
return 0;
|
}
|
|
static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
|
{
|
struct atmel_isi *isi = notifier_to_isi(notifier);
|
int ret;
|
|
isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
|
ret = isi_formats_init(isi);
|
if (ret) {
|
dev_err(isi->dev, "No supported mediabus format found\n");
|
return ret;
|
}
|
isi_camera_set_bus_param(isi);
|
|
ret = isi_set_default_fmt(isi);
|
if (ret) {
|
dev_err(isi->dev, "Could not set default format\n");
|
return ret;
|
}
|
|
ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1);
|
if (ret) {
|
dev_err(isi->dev, "Failed to register video device\n");
|
return ret;
|
}
|
|
dev_dbg(isi->dev, "Device registered as %s\n",
|
video_device_node_name(isi->vdev));
|
return 0;
|
}
|
|
static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier,
|
struct v4l2_subdev *sd,
|
struct v4l2_async_subdev *asd)
|
{
|
struct atmel_isi *isi = notifier_to_isi(notifier);
|
|
dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev));
|
|
/* Checks internally if vdev have been init or not */
|
video_unregister_device(isi->vdev);
|
}
|
|
static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier,
|
struct v4l2_subdev *subdev,
|
struct v4l2_async_subdev *asd)
|
{
|
struct atmel_isi *isi = notifier_to_isi(notifier);
|
|
dev_dbg(isi->dev, "subdev %s bound\n", subdev->name);
|
|
isi->entity.subdev = subdev;
|
|
return 0;
|
}
|
|
static const struct v4l2_async_notifier_operations isi_graph_notify_ops = {
|
.bound = isi_graph_notify_bound,
|
.unbind = isi_graph_notify_unbind,
|
.complete = isi_graph_notify_complete,
|
};
|
|
static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node)
|
{
|
struct device_node *ep = NULL;
|
struct device_node *remote;
|
|
ep = of_graph_get_next_endpoint(node, ep);
|
if (!ep)
|
return -EINVAL;
|
|
remote = of_graph_get_remote_port_parent(ep);
|
of_node_put(ep);
|
if (!remote)
|
return -EINVAL;
|
|
/* Remote node to connect */
|
isi->entity.node = remote;
|
isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
|
isi->entity.asd.match.fwnode = of_fwnode_handle(remote);
|
return 0;
|
}
|
|
static int isi_graph_init(struct atmel_isi *isi)
|
{
|
int ret;
|
|
/* Parse the graph to extract a list of subdevice DT nodes. */
|
ret = isi_graph_parse(isi, isi->dev->of_node);
|
if (ret < 0) {
|
dev_err(isi->dev, "Graph parsing failed\n");
|
return ret;
|
}
|
|
v4l2_async_notifier_init(&isi->notifier);
|
|
ret = v4l2_async_notifier_add_subdev(&isi->notifier, &isi->entity.asd);
|
if (ret) {
|
of_node_put(isi->entity.node);
|
return ret;
|
}
|
|
isi->notifier.ops = &isi_graph_notify_ops;
|
|
ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier);
|
if (ret < 0) {
|
dev_err(isi->dev, "Notifier registration failed\n");
|
v4l2_async_notifier_cleanup(&isi->notifier);
|
return ret;
|
}
|
|
return 0;
|
}
|
|
|
static int atmel_isi_probe(struct platform_device *pdev)
|
{
|
int irq;
|
struct atmel_isi *isi;
|
struct vb2_queue *q;
|
struct resource *regs;
|
int ret, i;
|
|
isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
|
if (!isi)
|
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;
|
isi->dev = &pdev->dev;
|
mutex_init(&isi->lock);
|
spin_lock_init(&isi->irqlock);
|
INIT_LIST_HEAD(&isi->video_buffer_list);
|
INIT_LIST_HEAD(&isi->dma_desc_head);
|
|
q = &isi->queue;
|
|
/* Initialize the top-level structure */
|
ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
|
if (ret)
|
return ret;
|
|
isi->vdev = video_device_alloc();
|
if (!isi->vdev) {
|
ret = -ENOMEM;
|
goto err_vdev_alloc;
|
}
|
|
/* video node */
|
isi->vdev->fops = &isi_fops;
|
isi->vdev->v4l2_dev = &isi->v4l2_dev;
|
isi->vdev->queue = &isi->queue;
|
strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
|
isi->vdev->release = video_device_release;
|
isi->vdev->ioctl_ops = &isi_ioctl_ops;
|
isi->vdev->lock = &isi->lock;
|
isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
|
V4L2_CAP_READWRITE;
|
video_set_drvdata(isi->vdev, isi);
|
|
/* buffer queue */
|
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
|
q->lock = &isi->lock;
|
q->drv_priv = isi;
|
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->min_buffers_needed = 2;
|
q->dev = &pdev->dev;
|
|
ret = vb2_queue_init(q);
|
if (ret < 0) {
|
dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
|
goto err_vb2_queue;
|
}
|
isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
|
sizeof(struct fbd) * VIDEO_MAX_FRAME,
|
&isi->fb_descriptors_phys,
|
GFP_KERNEL);
|
if (!isi->p_fb_descriptors) {
|
dev_err(&pdev->dev, "Can't allocate descriptors!\n");
|
ret = -ENOMEM;
|
goto err_dma_alloc;
|
}
|
|
for (i = 0; i < VIDEO_MAX_FRAME; 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;
|
|
ret = isi_graph_init(isi);
|
if (ret < 0)
|
goto err_req_irq;
|
|
pm_suspend_ignore_children(&pdev->dev, true);
|
pm_runtime_enable(&pdev->dev);
|
platform_set_drvdata(pdev, isi);
|
return 0;
|
|
err_req_irq:
|
err_ioremap:
|
dma_free_coherent(&pdev->dev,
|
sizeof(struct fbd) * VIDEO_MAX_FRAME,
|
isi->p_fb_descriptors,
|
isi->fb_descriptors_phys);
|
err_dma_alloc:
|
err_vb2_queue:
|
video_device_release(isi->vdev);
|
err_vdev_alloc:
|
v4l2_device_unregister(&isi->v4l2_dev);
|
|
return ret;
|
}
|
|
static int atmel_isi_remove(struct platform_device *pdev)
|
{
|
struct atmel_isi *isi = platform_get_drvdata(pdev);
|
|
dma_free_coherent(&pdev->dev,
|
sizeof(struct fbd) * VIDEO_MAX_FRAME,
|
isi->p_fb_descriptors,
|
isi->fb_descriptors_phys);
|
pm_runtime_disable(&pdev->dev);
|
v4l2_async_notifier_unregister(&isi->notifier);
|
v4l2_async_notifier_cleanup(&isi->notifier);
|
v4l2_device_unregister(&isi->v4l2_dev);
|
|
return 0;
|
}
|
|
#ifdef CONFIG_PM
|
static int atmel_isi_runtime_suspend(struct device *dev)
|
{
|
struct atmel_isi *isi = dev_get_drvdata(dev);
|
|
clk_disable_unprepare(isi->pclk);
|
|
return 0;
|
}
|
static int atmel_isi_runtime_resume(struct device *dev)
|
{
|
struct atmel_isi *isi = dev_get_drvdata(dev);
|
|
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 = {
|
.driver = {
|
.name = "atmel_isi",
|
.of_match_table = of_match_ptr(atmel_isi_of_match),
|
.pm = &atmel_isi_dev_pm_ops,
|
},
|
.probe = atmel_isi_probe,
|
.remove = atmel_isi_remove,
|
};
|
|
module_platform_driver(atmel_isi_driver);
|
|
MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
|
MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
|
MODULE_LICENSE("GPL");
|
MODULE_SUPPORTED_DEVICE("video");
|
