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![Laurent Pinchart](/assets/img/avatar_default.png)
To compute the value of the v4l2_pix_format::bytesperline field, we need information about planes layout for planar formats. The new enum soc_mbus_layout conveys that information. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1099 lines
28 KiB
C
1099 lines
28 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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/platform_device.h>
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#include <linux/slab.h>
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#include <media/atmel-isi.h>
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#include <media/soc_camera.h>
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#include <media/soc_mediabus.h>
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#include <media/videobuf2-dma-contig.h>
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#define MAX_BUFFER_NUM 32
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#define MAX_SUPPORT_WIDTH 2048
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#define MAX_SUPPORT_HEIGHT 2048
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#define VID_LIMIT_BYTES (16 * 1024 * 1024)
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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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/* ISI states */
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enum {
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ISI_STATE_IDLE = 0,
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ISI_STATE_READY,
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ISI_STATE_WAIT_SOF,
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};
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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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u32 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_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 atmel_isi {
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/* Protects the access of variables shared with the ISR */
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spinlock_t lock;
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void __iomem *regs;
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int sequence;
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/* State of the ISI module in capturing mode */
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int state;
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/* Wait queue for waiting for SOF */
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wait_queue_head_t vsync_wq;
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struct vb2_alloc_ctx *alloc_ctx;
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/* Allocate descriptors for dma buffer use */
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struct fbd *p_fb_descriptors;
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u32 fb_descriptors_phys;
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struct list_head dma_desc_head;
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struct isi_dma_desc dma_desc[MAX_BUFFER_NUM];
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struct completion complete;
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/* ISI peripherial clock */
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struct clk *pclk;
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/* ISI_MCK, feed to camera sensor to generate pixel clock */
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struct clk *mck;
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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 soc_camera_device *icd;
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struct soc_camera_host soc_host;
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};
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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 int configure_geometry(struct atmel_isi *isi, u32 width,
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u32 height, enum v4l2_mbus_pixelcode code)
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{
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u32 cfg2, cr;
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switch (code) {
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/* YUV, including grey */
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case V4L2_MBUS_FMT_Y8_1X8:
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cr = ISI_CFG2_GRAYSCALE;
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break;
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case V4L2_MBUS_FMT_UYVY8_2X8:
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cr = ISI_CFG2_YCC_SWAP_MODE_3;
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break;
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case V4L2_MBUS_FMT_VYUY8_2X8:
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cr = ISI_CFG2_YCC_SWAP_MODE_2;
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break;
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case V4L2_MBUS_FMT_YUYV8_2X8:
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cr = ISI_CFG2_YCC_SWAP_MODE_1;
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break;
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case V4L2_MBUS_FMT_YVYU8_2X8:
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cr = ISI_CFG2_YCC_SWAP_DEFAULT;
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break;
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/* RGB, TODO */
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default:
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return -EINVAL;
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}
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isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
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cfg2 = isi_readl(isi, ISI_CFG2);
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cfg2 |= cr;
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/* Set width */
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cfg2 &= ~(ISI_CFG2_IM_HSIZE_MASK);
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cfg2 |= ((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_CFG2_IM_VSIZE_MASK);
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cfg2 |= ((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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return 0;
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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_buffer *vb = &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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do_gettimeofday(&vb->v4l2_buf.timestamp);
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vb->v4l2_buf.sequence = isi->sequence++;
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vb2_buffer_done(vb, 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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isi_writel(isi, ISI_DMA_C_DSCR,
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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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}
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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->lock);
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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 ((pending & ISI_SR_VSYNC) &&
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(isi->state == ISI_STATE_IDLE)) {
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isi->state = ISI_STATE_READY;
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wake_up_interruptible(&isi->vsync_wq);
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ret = IRQ_HANDLED;
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}
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if (likely(pending & ISI_SR_CXFR_DONE))
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ret = atmel_isi_handle_streaming(isi);
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}
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spin_unlock(&isi->lock);
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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(100));
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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, const struct v4l2_format *fmt,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], void *alloc_ctxs[])
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{
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struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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unsigned long size;
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int ret;
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/* Reset ISI */
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ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
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if (ret < 0) {
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dev_err(icd->parent, "Reset ISI timed out\n");
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return ret;
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}
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/* Disable all interrupts */
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isi_writel(isi, ISI_INTDIS, ~0UL);
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size = icd->sizeimage;
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if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
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*nbuffers = MAX_BUFFER_NUM;
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if (size * *nbuffers > VID_LIMIT_BYTES)
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*nbuffers = VID_LIMIT_BYTES / size;
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*nplanes = 1;
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sizes[0] = size;
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alloc_ctxs[0] = isi->alloc_ctx;
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isi->sequence = 0;
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isi->active = NULL;
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dev_dbg(icd->parent, "%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 frame_buffer *buf = container_of(vb, 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 soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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unsigned long size;
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struct isi_dma_desc *desc;
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size = icd->sizeimage;
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if (vb2_plane_size(vb, 0) < size) {
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dev_err(icd->parent, "%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(&buf->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(icd->parent, "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 soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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struct frame_buffer *buf = container_of(vb, 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_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
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dev_err(isi->icd->parent, "Already in frame handling.\n");
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return;
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}
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isi_writel(isi, ISI_DMA_C_DSCR, buffer->p_dma_desc->fbd_phys);
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isi_writel(isi, ISI_DMA_C_CTRL, 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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/* Enable linked list */
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cfg1 |= isi->pdata->frate | ISI_CFG1_DISCR;
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/* Enable codec path and ISI */
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ctrl = ISI_CTRL_CDC | ISI_CTRL_EN;
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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 soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
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unsigned long flags = 0;
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spin_lock_irqsave(&isi->lock, flags);
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list_add_tail(&buf->list, &isi->video_buffer_list);
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if (isi->active == NULL) {
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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->lock, flags);
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}
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static int start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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u32 sr = 0;
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int ret;
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spin_lock_irq(&isi->lock);
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isi->state = ISI_STATE_IDLE;
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/* Clear any pending SOF interrupt */
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sr = isi_readl(isi, ISI_STATUS);
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/* Enable VSYNC interrupt for SOF */
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isi_writel(isi, ISI_INTEN, ISI_SR_VSYNC);
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isi_writel(isi, ISI_CTRL, ISI_CTRL_EN);
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spin_unlock_irq(&isi->lock);
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dev_dbg(icd->parent, "Waiting for SOF\n");
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ret = wait_event_interruptible(isi->vsync_wq,
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isi->state != ISI_STATE_IDLE);
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if (ret)
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goto err;
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if (isi->state != ISI_STATE_READY) {
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ret = -EIO;
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goto err;
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}
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spin_lock_irq(&isi->lock);
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isi->state = ISI_STATE_WAIT_SOF;
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isi_writel(isi, ISI_INTDIS, ISI_SR_VSYNC);
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if (count)
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start_dma(isi, isi->active);
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spin_unlock_irq(&isi->lock);
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return 0;
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err:
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isi->active = NULL;
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isi->sequence = 0;
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INIT_LIST_HEAD(&isi->video_buffer_list);
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return ret;
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}
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/* abort streaming and wait for last buffer */
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static int stop_streaming(struct vb2_queue *vq)
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{
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struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct atmel_isi *isi = ici->priv;
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struct frame_buffer *buf, *node;
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int ret = 0;
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unsigned long timeout;
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spin_lock_irq(&isi->lock);
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isi->active = NULL;
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/* Release all active buffers */
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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_STATE_ERROR);
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}
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spin_unlock_irq(&isi->lock);
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timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ;
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/* Wait until the end of the current frame. */
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while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&
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time_before(jiffies, timeout))
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msleep(1);
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if (time_after(jiffies, timeout)) {
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dev_err(icd->parent,
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"Timeout waiting for finishing codec request\n");
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return -ETIMEDOUT;
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}
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|
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/* 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");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static 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 = soc_camera_unlock,
|
|
.wait_finish = soc_camera_lock,
|
|
};
|
|
|
|
/* ------------------------------------------------------------------
|
|
SOC camera operations for the device
|
|
------------------------------------------------------------------*/
|
|
static int isi_camera_init_videobuf(struct vb2_queue *q,
|
|
struct soc_camera_device *icd)
|
|
{
|
|
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;
|
|
|
|
return vb2_queue_init(q);
|
|
}
|
|
|
|
static int isi_camera_set_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
|
|
struct atmel_isi *isi = 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_mbus_framefmt mf;
|
|
int ret;
|
|
|
|
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, video, s_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (mf.code != xlate->code)
|
|
return -EINVAL;
|
|
|
|
ret = configure_geometry(isi, pix->width, pix->height, xlate->code);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
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_mbus_framefmt mf;
|
|
u32 pixfmt = pix->pixelformat;
|
|
int ret;
|
|
|
|
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, video, try_mbus_fmt, &mf);
|
|
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,
|
|
},
|
|
};
|
|
|
|
/* 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;
|
|
/* sensor format */
|
|
enum v4l2_mbus_pixelcode code;
|
|
/* soc camera host format */
|
|
const struct soc_mbus_pixelfmt *fmt;
|
|
|
|
ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
|
|
if (ret < 0)
|
|
/* No more formats */
|
|
return 0;
|
|
|
|
fmt = soc_mbus_get_fmtdesc(code);
|
|
if (!fmt) {
|
|
dev_err(icd->parent,
|
|
"Invalid format code #%u: %d\n", idx, 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) {
|
|
case V4L2_MBUS_FMT_UYVY8_2X8:
|
|
case V4L2_MBUS_FMT_VYUY8_2X8:
|
|
case V4L2_MBUS_FMT_YUYV8_2X8:
|
|
case V4L2_MBUS_FMT_YVYU8_2X8:
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = &isi_camera_formats[0];
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(icd->parent, "Providing format %s using code %d\n",
|
|
isi_camera_formats[0].name, 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;
|
|
xlate++;
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static int isi_camera_add_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
|
|
struct atmel_isi *isi = ici->priv;
|
|
int ret;
|
|
|
|
if (isi->icd)
|
|
return -EBUSY;
|
|
|
|
ret = clk_enable(isi->pclk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = clk_enable(isi->mck);
|
|
if (ret) {
|
|
clk_disable(isi->pclk);
|
|
return ret;
|
|
}
|
|
|
|
isi->icd = icd;
|
|
dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
|
|
icd->devnum);
|
|
return 0;
|
|
}
|
|
/* Called with .video_lock held */
|
|
static void isi_camera_remove_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
|
|
struct atmel_isi *isi = ici->priv;
|
|
|
|
BUG_ON(icd != isi->icd);
|
|
|
|
clk_disable(isi->mck);
|
|
clk_disable(isi->pclk);
|
|
isi->icd = NULL;
|
|
|
|
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->capabilities = (V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_STREAMING);
|
|
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;
|
|
|
|
if (isi->pdata->has_emb_sync)
|
|
cfg1 |= ISI_CFG1_EMB_SYNC;
|
|
if (isi->pdata->full_mode)
|
|
cfg1 |= ISI_CFG1_FULL_MODE;
|
|
|
|
isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
|
|
isi_writel(isi, ISI_CFG1, cfg1);
|
|
|
|
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 __devexit 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);
|
|
|
|
free_irq(isi->irq, isi);
|
|
soc_camera_host_unregister(soc_host);
|
|
vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
|
|
dma_free_coherent(&pdev->dev,
|
|
sizeof(struct fbd) * MAX_BUFFER_NUM,
|
|
isi->p_fb_descriptors,
|
|
isi->fb_descriptors_phys);
|
|
|
|
iounmap(isi->regs);
|
|
clk_unprepare(isi->mck);
|
|
clk_put(isi->mck);
|
|
clk_unprepare(isi->pclk);
|
|
clk_put(isi->pclk);
|
|
kfree(isi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit atmel_isi_probe(struct platform_device *pdev)
|
|
{
|
|
unsigned int irq;
|
|
struct atmel_isi *isi;
|
|
struct clk *pclk;
|
|
struct resource *regs;
|
|
int ret, i;
|
|
struct device *dev = &pdev->dev;
|
|
struct soc_camera_host *soc_host;
|
|
struct isi_platform_data *pdata;
|
|
|
|
pdata = dev->platform_data;
|
|
if (!pdata || !pdata->data_width_flags || !pdata->mck_hz) {
|
|
dev_err(&pdev->dev,
|
|
"No config available for Atmel ISI\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!regs)
|
|
return -ENXIO;
|
|
|
|
pclk = clk_get(&pdev->dev, "isi_clk");
|
|
if (IS_ERR(pclk))
|
|
return PTR_ERR(pclk);
|
|
|
|
ret = clk_prepare(pclk);
|
|
if (ret)
|
|
goto err_clk_prepare_pclk;
|
|
|
|
isi = kzalloc(sizeof(struct atmel_isi), GFP_KERNEL);
|
|
if (!isi) {
|
|
ret = -ENOMEM;
|
|
dev_err(&pdev->dev, "Can't allocate interface!\n");
|
|
goto err_alloc_isi;
|
|
}
|
|
|
|
isi->pclk = pclk;
|
|
isi->pdata = pdata;
|
|
isi->active = NULL;
|
|
spin_lock_init(&isi->lock);
|
|
init_waitqueue_head(&isi->vsync_wq);
|
|
INIT_LIST_HEAD(&isi->video_buffer_list);
|
|
INIT_LIST_HEAD(&isi->dma_desc_head);
|
|
|
|
/* Get ISI_MCK, provided by programmable clock or external clock */
|
|
isi->mck = clk_get(dev, "isi_mck");
|
|
if (IS_ERR(isi->mck)) {
|
|
dev_err(dev, "Failed to get isi_mck\n");
|
|
ret = PTR_ERR(isi->mck);
|
|
goto err_clk_get;
|
|
}
|
|
|
|
ret = clk_prepare(isi->mck);
|
|
if (ret)
|
|
goto err_clk_prepare_mck;
|
|
|
|
/* Set ISI_MCK's frequency, it should be faster than pixel clock */
|
|
ret = clk_set_rate(isi->mck, pdata->mck_hz);
|
|
if (ret < 0)
|
|
goto err_set_mck_rate;
|
|
|
|
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) {
|
|
ret = -ENOMEM;
|
|
dev_err(&pdev->dev, "Can't allocate descriptors!\n");
|
|
goto err_alloc_descriptors;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
isi->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
|
|
if (IS_ERR(isi->alloc_ctx)) {
|
|
ret = PTR_ERR(isi->alloc_ctx);
|
|
goto err_alloc_ctx;
|
|
}
|
|
|
|
isi->regs = ioremap(regs->start, resource_size(regs));
|
|
if (!isi->regs) {
|
|
ret = -ENOMEM;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
if (pdata->data_width_flags & ISI_DATAWIDTH_8)
|
|
isi->width_flags = 1 << 7;
|
|
if (pdata->data_width_flags & ISI_DATAWIDTH_10)
|
|
isi->width_flags |= 1 << 9;
|
|
|
|
isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
ret = irq;
|
|
goto err_req_irq;
|
|
}
|
|
|
|
ret = request_irq(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;
|
|
|
|
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:
|
|
free_irq(isi->irq, isi);
|
|
err_req_irq:
|
|
iounmap(isi->regs);
|
|
err_ioremap:
|
|
vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
|
|
err_alloc_ctx:
|
|
dma_free_coherent(&pdev->dev,
|
|
sizeof(struct fbd) * MAX_BUFFER_NUM,
|
|
isi->p_fb_descriptors,
|
|
isi->fb_descriptors_phys);
|
|
err_alloc_descriptors:
|
|
err_set_mck_rate:
|
|
clk_unprepare(isi->mck);
|
|
err_clk_prepare_mck:
|
|
clk_put(isi->mck);
|
|
err_clk_get:
|
|
kfree(isi);
|
|
err_alloc_isi:
|
|
clk_unprepare(pclk);
|
|
err_clk_prepare_pclk:
|
|
clk_put(pclk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver atmel_isi_driver = {
|
|
.probe = atmel_isi_probe,
|
|
.remove = __devexit_p(atmel_isi_remove),
|
|
.driver = {
|
|
.name = "atmel_isi",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init atmel_isi_init_module(void)
|
|
{
|
|
return platform_driver_probe(&atmel_isi_driver, &atmel_isi_probe);
|
|
}
|
|
|
|
static void __exit atmel_isi_exit(void)
|
|
{
|
|
platform_driver_unregister(&atmel_isi_driver);
|
|
}
|
|
module_init(atmel_isi_init_module);
|
|
module_exit(atmel_isi_exit);
|
|
|
|
MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
|
|
MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_SUPPORTED_DEVICE("video");
|