| /* |
| * Copyright (c) 2011 Atmel Corporation |
| * Josh Wu, <josh.wu@atmel.com> |
| * |
| * Based on previous work by Lars Haring, <lars.haring@atmel.com> |
| * and Sedji Gaouaou |
| * Based on the bttv driver for Bt848 with respective copyright holders |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/completion.h> |
| #include <linux/delay.h> |
| #include <linux/fs.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| |
| #include <media/atmel-isi.h> |
| #include <media/soc_camera.h> |
| #include <media/soc_mediabus.h> |
| #include <media/videobuf2-dma-contig.h> |
| |
| #define MAX_BUFFER_NUM 32 |
| #define MAX_SUPPORT_WIDTH 2048 |
| #define MAX_SUPPORT_HEIGHT 2048 |
| #define VID_LIMIT_BYTES (16 * 1024 * 1024) |
| #define MIN_FRAME_RATE 15 |
| #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE) |
| |
| /* ISI states */ |
| enum { |
| ISI_STATE_IDLE = 0, |
| ISI_STATE_READY, |
| ISI_STATE_WAIT_SOF, |
| }; |
| |
| /* Frame buffer descriptor */ |
| struct fbd { |
| /* Physical address of the frame buffer */ |
| u32 fb_address; |
| /* DMA Control Register(only in HISI2) */ |
| u32 dma_ctrl; |
| /* Physical address of the next fbd */ |
| u32 next_fbd_address; |
| }; |
| |
| static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) |
| { |
| fb_desc->dma_ctrl = ctrl; |
| } |
| |
| struct isi_dma_desc { |
| struct list_head list; |
| struct fbd *p_fbd; |
| u32 fbd_phys; |
| }; |
| |
| /* Frame buffer data */ |
| struct frame_buffer { |
| struct vb2_buffer vb; |
| struct isi_dma_desc *p_dma_desc; |
| struct list_head list; |
| }; |
| |
| struct atmel_isi { |
| /* Protects the access of variables shared with the ISR */ |
| spinlock_t lock; |
| void __iomem *regs; |
| |
| int sequence; |
| /* State of the ISI module in capturing mode */ |
| int state; |
| |
| /* Wait queue for waiting for SOF */ |
| wait_queue_head_t vsync_wq; |
| |
| struct vb2_alloc_ctx *alloc_ctx; |
| |
| /* Allocate descriptors for dma buffer use */ |
| struct fbd *p_fb_descriptors; |
| u32 fb_descriptors_phys; |
| struct list_head dma_desc_head; |
| struct isi_dma_desc dma_desc[MAX_BUFFER_NUM]; |
| |
| struct completion complete; |
| /* ISI peripherial clock */ |
| struct clk *pclk; |
| /* ISI_MCK, feed to camera sensor to generate pixel clock */ |
| struct clk *mck; |
| unsigned int irq; |
| |
| struct isi_platform_data *pdata; |
| u16 width_flags; /* max 12 bits */ |
| |
| struct list_head video_buffer_list; |
| struct frame_buffer *active; |
| |
| struct soc_camera_device *icd; |
| struct soc_camera_host soc_host; |
| }; |
| |
| static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) |
| { |
| writel(val, isi->regs + reg); |
| } |
| static u32 isi_readl(struct atmel_isi *isi, u32 reg) |
| { |
| return readl(isi->regs + reg); |
| } |
| |
| static int configure_geometry(struct atmel_isi *isi, u32 width, |
| u32 height, enum v4l2_mbus_pixelcode code) |
| { |
| u32 cfg2, cr; |
| |
| switch (code) { |
| /* YUV, including grey */ |
| case V4L2_MBUS_FMT_Y8_1X8: |
| cr = ISI_CFG2_GRAYSCALE; |
| break; |
| case V4L2_MBUS_FMT_UYVY8_2X8: |
| cr = ISI_CFG2_YCC_SWAP_MODE_3; |
| break; |
| case V4L2_MBUS_FMT_VYUY8_2X8: |
| cr = ISI_CFG2_YCC_SWAP_MODE_2; |
| break; |
| case V4L2_MBUS_FMT_YUYV8_2X8: |
| cr = ISI_CFG2_YCC_SWAP_MODE_1; |
| break; |
| case V4L2_MBUS_FMT_YVYU8_2X8: |
| cr = ISI_CFG2_YCC_SWAP_DEFAULT; |
| break; |
| /* RGB, TODO */ |
| default: |
| return -EINVAL; |
| } |
| |
| isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); |
| |
| cfg2 = isi_readl(isi, ISI_CFG2); |
| cfg2 |= cr; |
| /* Set width */ |
| cfg2 &= ~(ISI_CFG2_IM_HSIZE_MASK); |
| cfg2 |= ((width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & |
| ISI_CFG2_IM_HSIZE_MASK; |
| /* Set height */ |
| cfg2 &= ~(ISI_CFG2_IM_VSIZE_MASK); |
| cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) |
| & ISI_CFG2_IM_VSIZE_MASK; |
| isi_writel(isi, ISI_CFG2, cfg2); |
| |
| return 0; |
| } |
| |
| static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) |
| { |
| if (isi->active) { |
| struct vb2_buffer *vb = &isi->active->vb; |
| struct frame_buffer *buf = isi->active; |
| |
| list_del_init(&buf->list); |
| do_gettimeofday(&vb->v4l2_buf.timestamp); |
| vb->v4l2_buf.sequence = isi->sequence++; |
| vb2_buffer_done(vb, VB2_BUF_STATE_DONE); |
| } |
| |
| if (list_empty(&isi->video_buffer_list)) { |
| isi->active = NULL; |
| } else { |
| /* start next dma frame. */ |
| isi->active = list_entry(isi->video_buffer_list.next, |
| struct frame_buffer, list); |
| isi_writel(isi, ISI_DMA_C_DSCR, |
| isi->active->p_dma_desc->fbd_phys); |
| isi_writel(isi, ISI_DMA_C_CTRL, |
| ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
| isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); |
| } |
| return IRQ_HANDLED; |
| } |
| |
| /* ISI interrupt service routine */ |
| static irqreturn_t isi_interrupt(int irq, void *dev_id) |
| { |
| struct atmel_isi *isi = dev_id; |
| u32 status, mask, pending; |
| irqreturn_t ret = IRQ_NONE; |
| |
| spin_lock(&isi->lock); |
| |
| status = isi_readl(isi, ISI_STATUS); |
| mask = isi_readl(isi, ISI_INTMASK); |
| pending = status & mask; |
| |
| if (pending & ISI_CTRL_SRST) { |
| complete(&isi->complete); |
| isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); |
| ret = IRQ_HANDLED; |
| } else if (pending & ISI_CTRL_DIS) { |
| complete(&isi->complete); |
| isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); |
| ret = IRQ_HANDLED; |
| } else { |
| if ((pending & ISI_SR_VSYNC) && |
| (isi->state == ISI_STATE_IDLE)) { |
| isi->state = ISI_STATE_READY; |
| wake_up_interruptible(&isi->vsync_wq); |
| ret = IRQ_HANDLED; |
| } |
| if (likely(pending & ISI_SR_CXFR_DONE)) |
| ret = atmel_isi_handle_streaming(isi); |
| } |
| |
| spin_unlock(&isi->lock); |
| return ret; |
| } |
| |
| #define WAIT_ISI_RESET 1 |
| #define WAIT_ISI_DISABLE 0 |
| static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) |
| { |
| unsigned long timeout; |
| /* |
| * The reset or disable will only succeed if we have a |
| * pixel clock from the camera. |
| */ |
| init_completion(&isi->complete); |
| |
| if (wait_reset) { |
| isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); |
| isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); |
| } else { |
| isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); |
| isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); |
| } |
| |
| timeout = wait_for_completion_timeout(&isi->complete, |
| msecs_to_jiffies(100)); |
| if (timeout == 0) |
| return -ETIMEDOUT; |
| |
| return 0; |
| } |
| |
| /* ------------------------------------------------------------------ |
| Videobuf operations |
| ------------------------------------------------------------------*/ |
| static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| unsigned long size; |
| int ret; |
| |
| /* Reset ISI */ |
| ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); |
| if (ret < 0) { |
| dev_err(icd->parent, "Reset ISI timed out\n"); |
| return ret; |
| } |
| /* Disable all interrupts */ |
| isi_writel(isi, ISI_INTDIS, ~0UL); |
| |
| size = icd->sizeimage; |
| |
| if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM) |
| *nbuffers = MAX_BUFFER_NUM; |
| |
| if (size * *nbuffers > VID_LIMIT_BYTES) |
| *nbuffers = VID_LIMIT_BYTES / size; |
| |
| *nplanes = 1; |
| sizes[0] = size; |
| alloc_ctxs[0] = isi->alloc_ctx; |
| |
| isi->sequence = 0; |
| isi->active = NULL; |
| |
| dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__, |
| *nbuffers, size); |
| |
| return 0; |
| } |
| |
| static int buffer_init(struct vb2_buffer *vb) |
| { |
| struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb); |
| |
| buf->p_dma_desc = NULL; |
| INIT_LIST_HEAD(&buf->list); |
| |
| return 0; |
| } |
| |
| static int buffer_prepare(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); |
| struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| unsigned long size; |
| struct isi_dma_desc *desc; |
| |
| size = icd->sizeimage; |
| |
| if (vb2_plane_size(vb, 0) < size) { |
| dev_err(icd->parent, "%s data will not fit into plane (%lu < %lu)\n", |
| __func__, vb2_plane_size(vb, 0), size); |
| return -EINVAL; |
| } |
| |
| vb2_set_plane_payload(&buf->vb, 0, size); |
| |
| if (!buf->p_dma_desc) { |
| if (list_empty(&isi->dma_desc_head)) { |
| dev_err(icd->parent, "Not enough dma descriptors.\n"); |
| return -EINVAL; |
| } else { |
| /* Get an available descriptor */ |
| desc = list_entry(isi->dma_desc_head.next, |
| struct isi_dma_desc, list); |
| /* Delete the descriptor since now it is used */ |
| list_del_init(&desc->list); |
| |
| /* Initialize the dma descriptor */ |
| desc->p_fbd->fb_address = |
| vb2_dma_contig_plane_dma_addr(vb, 0); |
| desc->p_fbd->next_fbd_address = 0; |
| set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB); |
| |
| buf->p_dma_desc = desc; |
| } |
| } |
| return 0; |
| } |
| |
| static void buffer_cleanup(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb); |
| |
| /* This descriptor is available now and we add to head list */ |
| if (buf->p_dma_desc) |
| list_add(&buf->p_dma_desc->list, &isi->dma_desc_head); |
| } |
| |
| static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) |
| { |
| u32 ctrl, cfg1; |
| |
| cfg1 = isi_readl(isi, ISI_CFG1); |
| /* Enable irq: cxfr for the codec path, pxfr for the preview path */ |
| isi_writel(isi, ISI_INTEN, |
| ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); |
| |
| /* Check if already in a frame */ |
| if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { |
| dev_err(isi->icd->parent, "Already in frame handling.\n"); |
| return; |
| } |
| |
| isi_writel(isi, ISI_DMA_C_DSCR, buffer->p_dma_desc->fbd_phys); |
| isi_writel(isi, ISI_DMA_C_CTRL, ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
| isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); |
| |
| /* Enable linked list */ |
| cfg1 |= isi->pdata->frate | ISI_CFG1_DISCR; |
| |
| /* Enable codec path and ISI */ |
| ctrl = ISI_CTRL_CDC | ISI_CTRL_EN; |
| isi_writel(isi, ISI_CTRL, ctrl); |
| isi_writel(isi, ISI_CFG1, cfg1); |
| } |
| |
| static void buffer_queue(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb); |
| unsigned long flags = 0; |
| |
| spin_lock_irqsave(&isi->lock, flags); |
| list_add_tail(&buf->list, &isi->video_buffer_list); |
| |
| if (isi->active == NULL) { |
| isi->active = buf; |
| if (vb2_is_streaming(vb->vb2_queue)) |
| start_dma(isi, buf); |
| } |
| spin_unlock_irqrestore(&isi->lock, flags); |
| } |
| |
| static int start_streaming(struct vb2_queue *vq, unsigned int count) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| |
| u32 sr = 0; |
| int ret; |
| |
| spin_lock_irq(&isi->lock); |
| isi->state = ISI_STATE_IDLE; |
| /* Clear any pending SOF interrupt */ |
| sr = isi_readl(isi, ISI_STATUS); |
| /* Enable VSYNC interrupt for SOF */ |
| isi_writel(isi, ISI_INTEN, ISI_SR_VSYNC); |
| isi_writel(isi, ISI_CTRL, ISI_CTRL_EN); |
| spin_unlock_irq(&isi->lock); |
| |
| dev_dbg(icd->parent, "Waiting for SOF\n"); |
| ret = wait_event_interruptible(isi->vsync_wq, |
| isi->state != ISI_STATE_IDLE); |
| if (ret) |
| goto err; |
| |
| if (isi->state != ISI_STATE_READY) { |
| ret = -EIO; |
| goto err; |
| } |
| |
| spin_lock_irq(&isi->lock); |
| isi->state = ISI_STATE_WAIT_SOF; |
| isi_writel(isi, ISI_INTDIS, ISI_SR_VSYNC); |
| if (count) |
| start_dma(isi, isi->active); |
| spin_unlock_irq(&isi->lock); |
| |
| return 0; |
| err: |
| isi->active = NULL; |
| isi->sequence = 0; |
| INIT_LIST_HEAD(&isi->video_buffer_list); |
| return ret; |
| } |
| |
| /* abort streaming and wait for last buffer */ |
| static int stop_streaming(struct vb2_queue *vq) |
| { |
| struct soc_camera_device *icd = soc_camera_from_vb2q(vq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct atmel_isi *isi = ici->priv; |
| struct frame_buffer *buf, *node; |
| int ret = 0; |
| unsigned long timeout; |
| |
| spin_lock_irq(&isi->lock); |
| isi->active = NULL; |
| /* Release all active buffers */ |
| list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { |
| list_del_init(&buf->list); |
| vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); |
| } |
| spin_unlock_irq(&isi->lock); |
| |
| timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ; |
| /* Wait until the end of the current frame. */ |
| while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && |
| time_before(jiffies, timeout)) |
| msleep(1); |
| |
| if (time_after(jiffies, timeout)) { |
| dev_err(icd->parent, |
| "Timeout waiting for finishing codec request\n"); |
| return -ETIMEDOUT; |
| } |
| |
| /* 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, |
| }, |
| }; |
| |
| /* 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"); |