| /* |
| * V4L2 Driver for SuperH Mobile CEU interface |
| * |
| * Copyright (C) 2008 Magnus Damm |
| * |
| * Based on V4L2 Driver for PXA camera host - "pxa_camera.c", |
| * |
| * Copyright (C) 2006, Sascha Hauer, Pengutronix |
| * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <linux/completion.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/errno.h> |
| #include <linux/fs.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/moduleparam.h> |
| #include <linux/time.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/videodev2.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/sched.h> |
| |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-dev.h> |
| #include <media/soc_camera.h> |
| #include <media/sh_mobile_ceu.h> |
| #include <media/sh_mobile_csi2.h> |
| #include <media/videobuf2-dma-contig.h> |
| #include <media/v4l2-mediabus.h> |
| #include <media/soc_mediabus.h> |
| |
| /* register offsets for sh7722 / sh7723 */ |
| |
| #define CAPSR 0x00 /* Capture start register */ |
| #define CAPCR 0x04 /* Capture control register */ |
| #define CAMCR 0x08 /* Capture interface control register */ |
| #define CMCYR 0x0c /* Capture interface cycle register */ |
| #define CAMOR 0x10 /* Capture interface offset register */ |
| #define CAPWR 0x14 /* Capture interface width register */ |
| #define CAIFR 0x18 /* Capture interface input format register */ |
| #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ |
| #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ |
| #define CRCNTR 0x28 /* CEU register control register */ |
| #define CRCMPR 0x2c /* CEU register forcible control register */ |
| #define CFLCR 0x30 /* Capture filter control register */ |
| #define CFSZR 0x34 /* Capture filter size clip register */ |
| #define CDWDR 0x38 /* Capture destination width register */ |
| #define CDAYR 0x3c /* Capture data address Y register */ |
| #define CDACR 0x40 /* Capture data address C register */ |
| #define CDBYR 0x44 /* Capture data bottom-field address Y register */ |
| #define CDBCR 0x48 /* Capture data bottom-field address C register */ |
| #define CBDSR 0x4c /* Capture bundle destination size register */ |
| #define CFWCR 0x5c /* Firewall operation control register */ |
| #define CLFCR 0x60 /* Capture low-pass filter control register */ |
| #define CDOCR 0x64 /* Capture data output control register */ |
| #define CDDCR 0x68 /* Capture data complexity level register */ |
| #define CDDAR 0x6c /* Capture data complexity level address register */ |
| #define CEIER 0x70 /* Capture event interrupt enable register */ |
| #define CETCR 0x74 /* Capture event flag clear register */ |
| #define CSTSR 0x7c /* Capture status register */ |
| #define CSRTR 0x80 /* Capture software reset register */ |
| #define CDSSR 0x84 /* Capture data size register */ |
| #define CDAYR2 0x90 /* Capture data address Y register 2 */ |
| #define CDACR2 0x94 /* Capture data address C register 2 */ |
| #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ |
| #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ |
| |
| #undef DEBUG_GEOMETRY |
| #ifdef DEBUG_GEOMETRY |
| #define dev_geo dev_info |
| #else |
| #define dev_geo dev_dbg |
| #endif |
| |
| /* per video frame buffer */ |
| struct sh_mobile_ceu_buffer { |
| struct vb2_buffer vb; /* v4l buffer must be first */ |
| struct list_head queue; |
| }; |
| |
| struct sh_mobile_ceu_dev { |
| struct soc_camera_host ici; |
| struct soc_camera_device *icd; |
| struct platform_device *csi2_pdev; |
| |
| unsigned int irq; |
| void __iomem *base; |
| size_t video_limit; |
| size_t buf_total; |
| |
| spinlock_t lock; /* Protects video buffer lists */ |
| struct list_head capture; |
| struct vb2_buffer *active; |
| struct vb2_alloc_ctx *alloc_ctx; |
| |
| struct sh_mobile_ceu_info *pdata; |
| struct completion complete; |
| |
| u32 cflcr; |
| |
| /* static max sizes either from platform data or default */ |
| int max_width; |
| int max_height; |
| |
| enum v4l2_field field; |
| int sequence; |
| |
| unsigned int image_mode:1; |
| unsigned int is_16bit:1; |
| unsigned int frozen:1; |
| }; |
| |
| struct sh_mobile_ceu_cam { |
| /* CEU offsets within the camera output, before the CEU scaler */ |
| unsigned int ceu_left; |
| unsigned int ceu_top; |
| /* Client output, as seen by the CEU */ |
| unsigned int width; |
| unsigned int height; |
| /* |
| * User window from S_CROP / G_CROP, produced by client cropping and |
| * scaling, CEU scaling and CEU cropping, mapped back onto the client |
| * input window |
| */ |
| struct v4l2_rect subrect; |
| /* Camera cropping rectangle */ |
| struct v4l2_rect rect; |
| const struct soc_mbus_pixelfmt *extra_fmt; |
| enum v4l2_mbus_pixelcode code; |
| }; |
| |
| static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb) |
| { |
| return container_of(vb, struct sh_mobile_ceu_buffer, vb); |
| } |
| |
| static void ceu_write(struct sh_mobile_ceu_dev *priv, |
| unsigned long reg_offs, u32 data) |
| { |
| iowrite32(data, priv->base + reg_offs); |
| } |
| |
| static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs) |
| { |
| return ioread32(priv->base + reg_offs); |
| } |
| |
| static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev) |
| { |
| int i, success = 0; |
| struct soc_camera_device *icd = pcdev->icd; |
| |
| ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
| |
| /* wait CSTSR.CPTON bit */ |
| for (i = 0; i < 1000; i++) { |
| if (!(ceu_read(pcdev, CSTSR) & 1)) { |
| success++; |
| break; |
| } |
| udelay(1); |
| } |
| |
| /* wait CAPSR.CPKIL bit */ |
| for (i = 0; i < 1000; i++) { |
| if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) { |
| success++; |
| break; |
| } |
| udelay(1); |
| } |
| |
| |
| if (2 != success) { |
| dev_warn(icd->pdev, "soft reset time out\n"); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Videobuf operations |
| */ |
| |
| /* |
| * .queue_setup() is called to check, whether the driver can accept the |
| * requested number of buffers and to fill in plane sizes |
| * for the current frame format if required |
| */ |
| static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq, |
| const struct v4l2_format *fmt, |
| unsigned int *count, unsigned int *num_planes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| |
| if (fmt) { |
| const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd, |
| fmt->fmt.pix.pixelformat); |
| int bytes_per_line; |
| |
| if (!xlate) |
| return -EINVAL; |
| |
| bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width, |
| xlate->host_fmt); |
| if (bytes_per_line < 0) |
| return bytes_per_line; |
| |
| sizes[0] = bytes_per_line * fmt->fmt.pix.height; |
| } else { |
| /* Called from VIDIOC_REQBUFS or in compatibility mode */ |
| sizes[0] = icd->sizeimage; |
| } |
| |
| alloc_ctxs[0] = pcdev->alloc_ctx; |
| |
| if (!vq->num_buffers) |
| pcdev->sequence = 0; |
| |
| if (!*count) |
| *count = 2; |
| |
| /* If *num_planes != 0, we have already verified *count. */ |
| if (pcdev->video_limit && !*num_planes) { |
| size_t size = PAGE_ALIGN(sizes[0]) * *count; |
| |
| if (size + pcdev->buf_total > pcdev->video_limit) |
| *count = (pcdev->video_limit - pcdev->buf_total) / |
| PAGE_ALIGN(sizes[0]); |
| } |
| |
| *num_planes = 1; |
| |
| dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]); |
| |
| return 0; |
| } |
| |
| #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */ |
| #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */ |
| #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */ |
| #define CEU_CEIER_VBP (1 << 20) /* vbp error */ |
| #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */ |
| #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP) |
| |
| |
| /* |
| * return value doesn't reflex the success/failure to queue the new buffer, |
| * but rather the status of the previous buffer. |
| */ |
| static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) |
| { |
| struct soc_camera_device *icd = pcdev->icd; |
| dma_addr_t phys_addr_top, phys_addr_bottom; |
| unsigned long top1, top2; |
| unsigned long bottom1, bottom2; |
| u32 status; |
| bool planar; |
| int ret = 0; |
| |
| /* |
| * The hardware is _very_ picky about this sequence. Especially |
| * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge |
| * several not-so-well documented interrupt sources in CETCR. |
| */ |
| ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK); |
| status = ceu_read(pcdev, CETCR); |
| ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC); |
| if (!pcdev->frozen) |
| ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK); |
| ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP); |
| ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW); |
| |
| /* |
| * When a VBP interrupt occurs, a capture end interrupt does not occur |
| * and the image of that frame is not captured correctly. So, soft reset |
| * is needed here. |
| */ |
| if (status & CEU_CEIER_VBP) { |
| sh_mobile_ceu_soft_reset(pcdev); |
| ret = -EIO; |
| } |
| |
| if (pcdev->frozen) { |
| complete(&pcdev->complete); |
| return ret; |
| } |
| |
| if (!pcdev->active) |
| return ret; |
| |
| if (V4L2_FIELD_INTERLACED_BT == pcdev->field) { |
| top1 = CDBYR; |
| top2 = CDBCR; |
| bottom1 = CDAYR; |
| bottom2 = CDACR; |
| } else { |
| top1 = CDAYR; |
| top2 = CDACR; |
| bottom1 = CDBYR; |
| bottom2 = CDBCR; |
| } |
| |
| phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0); |
| |
| switch (icd->current_fmt->host_fmt->fourcc) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV21: |
| case V4L2_PIX_FMT_NV16: |
| case V4L2_PIX_FMT_NV61: |
| planar = true; |
| break; |
| default: |
| planar = false; |
| } |
| |
| ceu_write(pcdev, top1, phys_addr_top); |
| if (V4L2_FIELD_NONE != pcdev->field) { |
| if (planar) |
| phys_addr_bottom = phys_addr_top + icd->user_width; |
| else |
| phys_addr_bottom = phys_addr_top + |
| soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| ceu_write(pcdev, bottom1, phys_addr_bottom); |
| } |
| |
| if (planar) { |
| phys_addr_top += icd->user_width * |
| icd->user_height; |
| ceu_write(pcdev, top2, phys_addr_top); |
| if (V4L2_FIELD_NONE != pcdev->field) { |
| phys_addr_bottom = phys_addr_top + icd->user_width; |
| ceu_write(pcdev, bottom2, phys_addr_bottom); |
| } |
| } |
| |
| ceu_write(pcdev, CAPSR, 0x1); /* start capture */ |
| |
| return ret; |
| } |
| |
| static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb) |
| { |
| struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); |
| |
| /* Added list head initialization on alloc */ |
| WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb); |
| |
| return 0; |
| } |
| |
| static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); |
| unsigned long size; |
| |
| size = icd->sizeimage; |
| |
| if (vb2_plane_size(vb, 0) < size) { |
| dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n", |
| vb->v4l2_buf.index, vb2_plane_size(vb, 0), size); |
| goto error; |
| } |
| |
| vb2_set_plane_payload(vb, 0, size); |
| |
| dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, |
| vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); |
| |
| #ifdef DEBUG |
| /* |
| * This can be useful if you want to see if we actually fill |
| * the buffer with something |
| */ |
| if (vb2_plane_vaddr(vb, 0)) |
| memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0)); |
| #endif |
| |
| spin_lock_irq(&pcdev->lock); |
| list_add_tail(&buf->queue, &pcdev->capture); |
| |
| if (!pcdev->active) { |
| /* |
| * Because there were no active buffer at this moment, |
| * we are not interested in the return value of |
| * sh_mobile_ceu_capture here. |
| */ |
| pcdev->active = vb; |
| sh_mobile_ceu_capture(pcdev); |
| } |
| spin_unlock_irq(&pcdev->lock); |
| |
| return; |
| |
| error: |
| vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
| } |
| |
| static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| |
| spin_lock_irq(&pcdev->lock); |
| |
| if (pcdev->active == vb) { |
| /* disable capture (release DMA buffer), reset */ |
| ceu_write(pcdev, CAPSR, 1 << 16); |
| pcdev->active = NULL; |
| } |
| |
| /* |
| * Doesn't hurt also if the list is empty, but it hurts, if queuing the |
| * buffer failed, and .buf_init() hasn't been called |
| */ |
| if (buf->queue.next) |
| list_del_init(&buf->queue); |
| |
| pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0)); |
| dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__, |
| pcdev->buf_total); |
| |
| spin_unlock_irq(&pcdev->lock); |
| } |
| |
| static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb) |
| { |
| struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| |
| pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0)); |
| dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__, |
| pcdev->buf_total); |
| |
| /* This is for locking debugging only */ |
| INIT_LIST_HEAD(&to_ceu_vb(vb)->queue); |
| return 0; |
| } |
| |
| static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q) |
| { |
| struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct list_head *buf_head, *tmp; |
| |
| spin_lock_irq(&pcdev->lock); |
| |
| pcdev->active = NULL; |
| |
| list_for_each_safe(buf_head, tmp, &pcdev->capture) |
| list_del_init(buf_head); |
| |
| spin_unlock_irq(&pcdev->lock); |
| |
| return sh_mobile_ceu_soft_reset(pcdev); |
| } |
| |
| static struct vb2_ops sh_mobile_ceu_videobuf_ops = { |
| .queue_setup = sh_mobile_ceu_videobuf_setup, |
| .buf_prepare = sh_mobile_ceu_videobuf_prepare, |
| .buf_queue = sh_mobile_ceu_videobuf_queue, |
| .buf_cleanup = sh_mobile_ceu_videobuf_release, |
| .buf_init = sh_mobile_ceu_videobuf_init, |
| .wait_prepare = soc_camera_unlock, |
| .wait_finish = soc_camera_lock, |
| .stop_streaming = sh_mobile_ceu_stop_streaming, |
| }; |
| |
| static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) |
| { |
| struct sh_mobile_ceu_dev *pcdev = data; |
| struct vb2_buffer *vb; |
| int ret; |
| |
| spin_lock(&pcdev->lock); |
| |
| vb = pcdev->active; |
| if (!vb) |
| /* Stale interrupt from a released buffer */ |
| goto out; |
| |
| list_del_init(&to_ceu_vb(vb)->queue); |
| |
| if (!list_empty(&pcdev->capture)) |
| pcdev->active = &list_entry(pcdev->capture.next, |
| struct sh_mobile_ceu_buffer, queue)->vb; |
| else |
| pcdev->active = NULL; |
| |
| ret = sh_mobile_ceu_capture(pcdev); |
| do_gettimeofday(&vb->v4l2_buf.timestamp); |
| if (!ret) { |
| vb->v4l2_buf.field = pcdev->field; |
| vb->v4l2_buf.sequence = pcdev->sequence++; |
| } |
| vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
| |
| out: |
| spin_unlock(&pcdev->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev) |
| { |
| struct v4l2_subdev *sd; |
| |
| if (!pcdev->csi2_pdev) |
| return NULL; |
| |
| v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev) |
| if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd)) |
| return sd; |
| |
| return NULL; |
| } |
| |
| /* Called with .video_lock held */ |
| static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct v4l2_subdev *csi2_sd; |
| int ret; |
| |
| if (pcdev->icd) |
| return -EBUSY; |
| |
| dev_info(icd->parent, |
| "SuperH Mobile CEU driver attached to camera %d\n", |
| icd->devnum); |
| |
| pm_runtime_get_sync(ici->v4l2_dev.dev); |
| |
| pcdev->buf_total = 0; |
| |
| ret = sh_mobile_ceu_soft_reset(pcdev); |
| |
| csi2_sd = find_csi2(pcdev); |
| if (csi2_sd) { |
| csi2_sd->grp_id = soc_camera_grp_id(icd); |
| v4l2_set_subdev_hostdata(csi2_sd, icd); |
| } |
| |
| ret = v4l2_subdev_call(csi2_sd, core, s_power, 1); |
| if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { |
| pm_runtime_put_sync(ici->v4l2_dev.dev); |
| return ret; |
| } |
| |
| /* |
| * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver |
| * has not found this soc-camera device among its clients |
| */ |
| if (ret == -ENODEV && csi2_sd) |
| csi2_sd->grp_id = 0; |
| pcdev->icd = icd; |
| |
| return 0; |
| } |
| |
| /* Called with .video_lock held */ |
| static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct v4l2_subdev *csi2_sd = find_csi2(pcdev); |
| |
| BUG_ON(icd != pcdev->icd); |
| |
| v4l2_subdev_call(csi2_sd, core, s_power, 0); |
| if (csi2_sd) |
| csi2_sd->grp_id = 0; |
| /* disable capture, disable interrupts */ |
| ceu_write(pcdev, CEIER, 0); |
| sh_mobile_ceu_soft_reset(pcdev); |
| |
| /* make sure active buffer is canceled */ |
| spin_lock_irq(&pcdev->lock); |
| if (pcdev->active) { |
| list_del_init(&to_ceu_vb(pcdev->active)->queue); |
| vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR); |
| pcdev->active = NULL; |
| } |
| spin_unlock_irq(&pcdev->lock); |
| |
| pm_runtime_put_sync(ici->v4l2_dev.dev); |
| |
| dev_info(icd->parent, |
| "SuperH Mobile CEU driver detached from camera %d\n", |
| icd->devnum); |
| |
| pcdev->icd = NULL; |
| } |
| |
| /* |
| * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)" |
| * in SH7722 Hardware Manual |
| */ |
| static unsigned int size_dst(unsigned int src, unsigned int scale) |
| { |
| unsigned int mant_pre = scale >> 12; |
| if (!src || !scale) |
| return src; |
| return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) * |
| mant_pre * 4096 / scale + 1; |
| } |
| |
| static u16 calc_scale(unsigned int src, unsigned int *dst) |
| { |
| u16 scale; |
| |
| if (src == *dst) |
| return 0; |
| |
| scale = (src * 4096 / *dst) & ~7; |
| |
| while (scale > 4096 && size_dst(src, scale) < *dst) |
| scale -= 8; |
| |
| *dst = size_dst(src, scale); |
| |
| return scale; |
| } |
| |
| /* rect is guaranteed to not exceed the scaled camera rectangle */ |
| static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| unsigned int height, width, cdwdr_width, in_width, in_height; |
| unsigned int left_offset, top_offset; |
| u32 camor; |
| |
| dev_geo(icd->parent, "Crop %ux%u@%u:%u\n", |
| icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top); |
| |
| left_offset = cam->ceu_left; |
| top_offset = cam->ceu_top; |
| |
| WARN_ON(icd->user_width & 3 || icd->user_height & 3); |
| |
| width = icd->user_width; |
| |
| if (pcdev->image_mode) { |
| in_width = cam->width; |
| if (!pcdev->is_16bit) { |
| in_width *= 2; |
| left_offset *= 2; |
| } |
| cdwdr_width = width; |
| } else { |
| int bytes_per_line = soc_mbus_bytes_per_line(width, |
| icd->current_fmt->host_fmt); |
| unsigned int w_factor; |
| |
| switch (icd->current_fmt->host_fmt->packing) { |
| case SOC_MBUS_PACKING_2X8_PADHI: |
| w_factor = 2; |
| break; |
| default: |
| w_factor = 1; |
| } |
| |
| in_width = cam->width * w_factor; |
| left_offset *= w_factor; |
| |
| if (bytes_per_line < 0) |
| cdwdr_width = width; |
| else |
| cdwdr_width = bytes_per_line; |
| } |
| |
| height = icd->user_height; |
| in_height = cam->height; |
| if (V4L2_FIELD_NONE != pcdev->field) { |
| height = (height / 2) & ~3; |
| in_height /= 2; |
| top_offset /= 2; |
| cdwdr_width *= 2; |
| } |
| |
| /* CSI2 special configuration */ |
| if (pcdev->pdata->csi2) { |
| in_width = ((in_width - 2) * 2); |
| left_offset *= 2; |
| } |
| |
| /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */ |
| camor = left_offset | (top_offset << 16); |
| |
| dev_geo(icd->parent, |
| "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor, |
| (in_height << 16) | in_width, (height << 16) | width, |
| cdwdr_width); |
| |
| ceu_write(pcdev, CAMOR, camor); |
| ceu_write(pcdev, CAPWR, (in_height << 16) | in_width); |
| /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */ |
| ceu_write(pcdev, CFSZR, (height << 16) | width); |
| ceu_write(pcdev, CDWDR, cdwdr_width); |
| } |
| |
| static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev) |
| { |
| u32 capsr = ceu_read(pcdev, CAPSR); |
| ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */ |
| return capsr; |
| } |
| |
| static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr) |
| { |
| unsigned long timeout = jiffies + 10 * HZ; |
| |
| /* |
| * Wait until the end of the current frame. It can take a long time, |
| * but if it has been aborted by a CAPSR reset, it shoule exit sooner. |
| */ |
| while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout)) |
| msleep(1); |
| |
| if (time_after(jiffies, timeout)) { |
| dev_err(pcdev->ici.v4l2_dev.dev, |
| "Timeout waiting for frame end! Interface problem?\n"); |
| return; |
| } |
| |
| /* Wait until reset clears, this shall not hang... */ |
| while (ceu_read(pcdev, CAPSR) & (1 << 16)) |
| udelay(10); |
| |
| /* Anything to restore? */ |
| if (capsr & ~(1 << 16)) |
| ceu_write(pcdev, CAPSR, capsr); |
| } |
| |
| /* Find the bus subdevice driver, e.g., CSI2 */ |
| static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev, |
| struct soc_camera_device *icd) |
| { |
| if (pcdev->csi2_pdev) { |
| struct v4l2_subdev *csi2_sd = find_csi2(pcdev); |
| if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd)) |
| return csi2_sd; |
| } |
| |
| return soc_camera_to_subdev(icd); |
| } |
| |
| #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \ |
| V4L2_MBUS_PCLK_SAMPLE_RISING | \ |
| V4L2_MBUS_HSYNC_ACTIVE_HIGH | \ |
| V4L2_MBUS_HSYNC_ACTIVE_LOW | \ |
| V4L2_MBUS_VSYNC_ACTIVE_HIGH | \ |
| V4L2_MBUS_VSYNC_ACTIVE_LOW | \ |
| V4L2_MBUS_DATA_ACTIVE_HIGH) |
| |
| /* Capture is not running, no interrupts, no locking needed */ |
| static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd); |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; |
| unsigned long value, common_flags = CEU_BUS_FLAGS; |
| u32 capsr = capture_save_reset(pcdev); |
| unsigned int yuv_lineskip; |
| int ret; |
| |
| /* |
| * If the client doesn't implement g_mbus_config, we just use our |
| * platform data |
| */ |
| ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); |
| if (!ret) { |
| common_flags = soc_mbus_config_compatible(&cfg, |
| common_flags); |
| if (!common_flags) |
| return -EINVAL; |
| } else if (ret != -ENOIOCTLCMD) { |
| return ret; |
| } |
| |
| /* Make choises, based on platform preferences */ |
| if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && |
| (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { |
| if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_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 (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW) |
| common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH; |
| else |
| common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW; |
| } |
| |
| cfg.flags = common_flags; |
| ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); |
| if (ret < 0 && ret != -ENOIOCTLCMD) |
| return ret; |
| |
| if (icd->current_fmt->host_fmt->bits_per_sample > 8) |
| pcdev->is_16bit = 1; |
| else |
| pcdev->is_16bit = 0; |
| |
| ceu_write(pcdev, CRCNTR, 0); |
| ceu_write(pcdev, CRCMPR, 0); |
| |
| value = 0x00000010; /* data fetch by default */ |
| yuv_lineskip = 0x10; |
| |
| switch (icd->current_fmt->host_fmt->fourcc) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV21: |
| /* convert 4:2:2 -> 4:2:0 */ |
| yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */ |
| /* fall-through */ |
| case V4L2_PIX_FMT_NV16: |
| case V4L2_PIX_FMT_NV61: |
| switch (cam->code) { |
| case V4L2_MBUS_FMT_UYVY8_2X8: |
| value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ |
| break; |
| case V4L2_MBUS_FMT_VYUY8_2X8: |
| value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ |
| break; |
| case V4L2_MBUS_FMT_YUYV8_2X8: |
| value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ |
| break; |
| case V4L2_MBUS_FMT_YVYU8_2X8: |
| value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */ |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 || |
| icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61) |
| value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */ |
| |
| value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0; |
| value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0; |
| value |= pcdev->is_16bit ? 1 << 12 : 0; |
| |
| /* CSI2 mode */ |
| if (pcdev->pdata->csi2) |
| value |= 3 << 12; |
| |
| ceu_write(pcdev, CAMCR, value); |
| |
| ceu_write(pcdev, CAPCR, 0x00300000); |
| |
| switch (pcdev->field) { |
| case V4L2_FIELD_INTERLACED_TB: |
| value = 0x101; |
| break; |
| case V4L2_FIELD_INTERLACED_BT: |
| value = 0x102; |
| break; |
| default: |
| value = 0; |
| break; |
| } |
| ceu_write(pcdev, CAIFR, value); |
| |
| sh_mobile_ceu_set_rect(icd); |
| mdelay(1); |
| |
| dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr); |
| ceu_write(pcdev, CFLCR, pcdev->cflcr); |
| |
| /* |
| * A few words about byte order (observed in Big Endian mode) |
| * |
| * In data fetch mode bytes are received in chunks of 8 bytes. |
| * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) |
| * |
| * The data is however by default written to memory in reverse order: |
| * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) |
| * |
| * The lowest three bits of CDOCR allows us to do swapping, |
| * using 7 we swap the data bytes to match the incoming order: |
| * D0, D1, D2, D3, D4, D5, D6, D7 |
| */ |
| value = 0x00000007 | yuv_lineskip; |
| |
| ceu_write(pcdev, CDOCR, value); |
| ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ |
| |
| capture_restore(pcdev, capsr); |
| |
| /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ |
| return 0; |
| } |
| |
| static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd, |
| unsigned char buswidth) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd); |
| unsigned long common_flags = CEU_BUS_FLAGS; |
| struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; |
| int ret; |
| |
| ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); |
| if (!ret) |
| common_flags = soc_mbus_config_compatible(&cfg, |
| common_flags); |
| else if (ret != -ENOIOCTLCMD) |
| return ret; |
| |
| if (!common_flags || buswidth > 16) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = { |
| { |
| .fourcc = V4L2_PIX_FMT_NV12, |
| .name = "NV12", |
| .bits_per_sample = 8, |
| .packing = SOC_MBUS_PACKING_1_5X8, |
| .order = SOC_MBUS_ORDER_LE, |
| }, { |
| .fourcc = V4L2_PIX_FMT_NV21, |
| .name = "NV21", |
| .bits_per_sample = 8, |
| .packing = SOC_MBUS_PACKING_1_5X8, |
| .order = SOC_MBUS_ORDER_LE, |
| }, { |
| .fourcc = V4L2_PIX_FMT_NV16, |
| .name = "NV16", |
| .bits_per_sample = 8, |
| .packing = SOC_MBUS_PACKING_2X8_PADHI, |
| .order = SOC_MBUS_ORDER_LE, |
| }, { |
| .fourcc = V4L2_PIX_FMT_NV61, |
| .name = "NV61", |
| .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 sh_mobile_ceu_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_1_5X8) || |
| (fmt->bits_per_sample == 8 && |
| fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || |
| (fmt->bits_per_sample > 8 && |
| fmt->packing == SOC_MBUS_PACKING_EXTEND16); |
| } |
| |
| static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect); |
| |
| static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl) |
| { |
| return container_of(ctrl->handler, struct soc_camera_device, |
| ctrl_handler); |
| } |
| |
| static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct soc_camera_device *icd = ctrl_to_icd(ctrl); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_SHARPNESS: |
| switch (icd->current_fmt->host_fmt->fourcc) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV21: |
| case V4L2_PIX_FMT_NV16: |
| case V4L2_PIX_FMT_NV61: |
| ceu_write(pcdev, CLFCR, !ctrl->val); |
| return 0; |
| } |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = { |
| .s_ctrl = sh_mobile_ceu_s_ctrl, |
| }; |
| |
| static int sh_mobile_ceu_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); |
| struct device *dev = icd->parent; |
| struct soc_camera_host *ici = to_soc_camera_host(dev); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| int ret, k, n; |
| int formats = 0; |
| struct sh_mobile_ceu_cam *cam; |
| enum v4l2_mbus_pixelcode code; |
| 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_warn(dev, "unsupported format code #%u: %d\n", idx, code); |
| return 0; |
| } |
| |
| if (!pcdev->pdata->csi2) { |
| /* Are there any restrictions in the CSI-2 case? */ |
| ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample); |
| if (ret < 0) |
| return 0; |
| } |
| |
| if (!icd->host_priv) { |
| struct v4l2_mbus_framefmt mf; |
| struct v4l2_rect rect; |
| int shift = 0; |
| |
| /* Add our control */ |
| v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops, |
| V4L2_CID_SHARPNESS, 0, 1, 1, 0); |
| if (icd->ctrl_handler.error) |
| return icd->ctrl_handler.error; |
| |
| /* FIXME: subwindow is lost between close / open */ |
| |
| /* Cache current client geometry */ |
| ret = client_g_rect(sd, &rect); |
| if (ret < 0) |
| return ret; |
| |
| /* First time */ |
| ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * All currently existing CEU implementations support 2560x1920 |
| * or larger frames. If the sensor is proposing too big a frame, |
| * don't bother with possibly supportred by the CEU larger |
| * sizes, just try VGA multiples. If needed, this can be |
| * adjusted in the future. |
| */ |
| while ((mf.width > pcdev->max_width || |
| mf.height > pcdev->max_height) && shift < 4) { |
| /* Try 2560x1920, 1280x960, 640x480, 320x240 */ |
| mf.width = 2560 >> shift; |
| mf.height = 1920 >> shift; |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, |
| soc_camera_grp_id(icd), video, |
| s_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| shift++; |
| } |
| |
| if (shift == 4) { |
| dev_err(dev, "Failed to configure the client below %ux%x\n", |
| mf.width, mf.height); |
| return -EIO; |
| } |
| |
| dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height); |
| |
| cam = kzalloc(sizeof(*cam), GFP_KERNEL); |
| if (!cam) |
| return -ENOMEM; |
| |
| /* We are called with current camera crop, initialise subrect with it */ |
| cam->rect = rect; |
| cam->subrect = rect; |
| |
| cam->width = mf.width; |
| cam->height = mf.height; |
| |
| icd->host_priv = cam; |
| } else { |
| cam = icd->host_priv; |
| } |
| |
| /* Beginning of a pass */ |
| if (!idx) |
| cam->extra_fmt = NULL; |
| |
| 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: |
| if (cam->extra_fmt) |
| break; |
| |
| /* |
| * Our case is simple so far: for any of the above four camera |
| * formats we add all our four synthesized NV* formats, so, |
| * just marking the device with a single flag suffices. If |
| * the format generation rules are more complex, you would have |
| * to actually hang your already added / counted formats onto |
| * the host_priv pointer and check whether the format you're |
| * going to add now is already there. |
| */ |
| cam->extra_fmt = sh_mobile_ceu_formats; |
| |
| n = ARRAY_SIZE(sh_mobile_ceu_formats); |
| formats += n; |
| for (k = 0; xlate && k < n; k++) { |
| xlate->host_fmt = &sh_mobile_ceu_formats[k]; |
| xlate->code = code; |
| xlate++; |
| dev_dbg(dev, "Providing format %s using code %d\n", |
| sh_mobile_ceu_formats[k].name, code); |
| } |
| break; |
| default: |
| if (!sh_mobile_ceu_packing_supported(fmt)) |
| return 0; |
| } |
| |
| /* Generic pass-through */ |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = fmt; |
| xlate->code = code; |
| xlate++; |
| dev_dbg(dev, "Providing format %s in pass-through mode\n", |
| fmt->name); |
| } |
| |
| return formats; |
| } |
| |
| static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd) |
| { |
| kfree(icd->host_priv); |
| icd->host_priv = NULL; |
| } |
| |
| /* Check if any dimension of r1 is smaller than respective one of r2 */ |
| static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2) |
| { |
| return r1->width < r2->width || r1->height < r2->height; |
| } |
| |
| /* Check if r1 fails to cover r2 */ |
| static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2) |
| { |
| return r1->left > r2->left || r1->top > r2->top || |
| r1->left + r1->width < r2->left + r2->width || |
| r1->top + r1->height < r2->top + r2->height; |
| } |
| |
| static unsigned int scale_down(unsigned int size, unsigned int scale) |
| { |
| return (size * 4096 + scale / 2) / scale; |
| } |
| |
| static unsigned int calc_generic_scale(unsigned int input, unsigned int output) |
| { |
| return (input * 4096 + output / 2) / output; |
| } |
| |
| /* Get and store current client crop */ |
| static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect) |
| { |
| struct v4l2_crop crop; |
| struct v4l2_cropcap cap; |
| int ret; |
| |
| crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| ret = v4l2_subdev_call(sd, video, g_crop, &crop); |
| if (!ret) { |
| *rect = crop.c; |
| return ret; |
| } |
| |
| /* Camera driver doesn't support .g_crop(), assume default rectangle */ |
| cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| if (!ret) |
| *rect = cap.defrect; |
| |
| return ret; |
| } |
| |
| /* Client crop has changed, update our sub-rectangle to remain within the area */ |
| static void update_subrect(struct sh_mobile_ceu_cam *cam) |
| { |
| struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect; |
| |
| if (rect->width < subrect->width) |
| subrect->width = rect->width; |
| |
| if (rect->height < subrect->height) |
| subrect->height = rect->height; |
| |
| if (rect->left > subrect->left) |
| subrect->left = rect->left; |
| else if (rect->left + rect->width > |
| subrect->left + subrect->width) |
| subrect->left = rect->left + rect->width - |
| subrect->width; |
| |
| if (rect->top > subrect->top) |
| subrect->top = rect->top; |
| else if (rect->top + rect->height > |
| subrect->top + subrect->height) |
| subrect->top = rect->top + rect->height - |
| subrect->height; |
| } |
| |
| /* |
| * The common for both scaling and cropping iterative approach is: |
| * 1. try if the client can produce exactly what requested by the user |
| * 2. if (1) failed, try to double the client image until we get one big enough |
| * 3. if (2) failed, try to request the maximum image |
| */ |
| static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop, |
| struct v4l2_crop *cam_crop) |
| { |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c; |
| struct device *dev = sd->v4l2_dev->dev; |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct v4l2_cropcap cap; |
| int ret; |
| unsigned int width, height; |
| |
| v4l2_subdev_call(sd, video, s_crop, crop); |
| ret = client_g_rect(sd, cam_rect); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Now cam_crop contains the current camera input rectangle, and it must |
| * be within camera cropcap bounds |
| */ |
| if (!memcmp(rect, cam_rect, sizeof(*rect))) { |
| /* Even if camera S_CROP failed, but camera rectangle matches */ |
| dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n", |
| rect->width, rect->height, rect->left, rect->top); |
| cam->rect = *cam_rect; |
| return 0; |
| } |
| |
| /* Try to fix cropping, that camera hasn't managed to set */ |
| dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n", |
| cam_rect->width, cam_rect->height, |
| cam_rect->left, cam_rect->top, |
| rect->width, rect->height, rect->left, rect->top); |
| |
| /* We need sensor maximum rectangle */ |
| ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| if (ret < 0) |
| return ret; |
| |
| /* Put user requested rectangle within sensor bounds */ |
| soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2, |
| cap.bounds.width); |
| soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4, |
| cap.bounds.height); |
| |
| /* |
| * Popular special case - some cameras can only handle fixed sizes like |
| * QVGA, VGA,... Take care to avoid infinite loop. |
| */ |
| width = max(cam_rect->width, 2); |
| height = max(cam_rect->height, 2); |
| |
| /* |
| * Loop as long as sensor is not covering the requested rectangle and |
| * is still within its bounds |
| */ |
| while (!ret && (is_smaller(cam_rect, rect) || |
| is_inside(cam_rect, rect)) && |
| (cap.bounds.width > width || cap.bounds.height > height)) { |
| |
| width *= 2; |
| height *= 2; |
| |
| cam_rect->width = width; |
| cam_rect->height = height; |
| |
| /* |
| * We do not know what capabilities the camera has to set up |
| * left and top borders. We could try to be smarter in iterating |
| * them, e.g., if camera current left is to the right of the |
| * target left, set it to the middle point between the current |
| * left and minimum left. But that would add too much |
| * complexity: we would have to iterate each border separately. |
| * Instead we just drop to the left and top bounds. |
| */ |
| if (cam_rect->left > rect->left) |
| cam_rect->left = cap.bounds.left; |
| |
| if (cam_rect->left + cam_rect->width < rect->left + rect->width) |
| cam_rect->width = rect->left + rect->width - |
| cam_rect->left; |
| |
| if (cam_rect->top > rect->top) |
| cam_rect->top = cap.bounds.top; |
| |
| if (cam_rect->top + cam_rect->height < rect->top + rect->height) |
| cam_rect->height = rect->top + rect->height - |
| cam_rect->top; |
| |
| v4l2_subdev_call(sd, video, s_crop, cam_crop); |
| ret = client_g_rect(sd, cam_rect); |
| dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret, |
| cam_rect->width, cam_rect->height, |
| cam_rect->left, cam_rect->top); |
| } |
| |
| /* S_CROP must not modify the rectangle */ |
| if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) { |
| /* |
| * The camera failed to configure a suitable cropping, |
| * we cannot use the current rectangle, set to max |
| */ |
| *cam_rect = cap.bounds; |
| v4l2_subdev_call(sd, video, s_crop, cam_crop); |
| ret = client_g_rect(sd, cam_rect); |
| dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret, |
| cam_rect->width, cam_rect->height, |
| cam_rect->left, cam_rect->top); |
| } |
| |
| if (!ret) { |
| cam->rect = *cam_rect; |
| update_subrect(cam); |
| } |
| |
| return ret; |
| } |
| |
| /* Iterative s_mbus_fmt, also updates cached client crop on success */ |
| static int client_s_fmt(struct soc_camera_device *icd, |
| struct v4l2_mbus_framefmt *mf, bool ceu_can_scale) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct device *dev = icd->parent; |
| unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h; |
| unsigned int max_width, max_height; |
| struct v4l2_cropcap cap; |
| bool ceu_1to1; |
| int ret; |
| |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, |
| soc_camera_grp_id(icd), video, |
| s_mbus_fmt, mf); |
| if (ret < 0) |
| return ret; |
| |
| dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height); |
| |
| if (width == mf->width && height == mf->height) { |
| /* Perfect! The client has done it all. */ |
| ceu_1to1 = true; |
| goto update_cache; |
| } |
| |
| ceu_1to1 = false; |
| if (!ceu_can_scale) |
| goto update_cache; |
| |
| cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| if (ret < 0) |
| return ret; |
| |
| max_width = min(cap.bounds.width, pcdev->max_width); |
| max_height = min(cap.bounds.height, pcdev->max_height); |
| |
| /* Camera set a format, but geometry is not precise, try to improve */ |
| tmp_w = mf->width; |
| tmp_h = mf->height; |
| |
| /* width <= max_width && height <= max_height - guaranteed by try_fmt */ |
| while ((width > tmp_w || height > tmp_h) && |
| tmp_w < max_width && tmp_h < max_height) { |
| tmp_w = min(2 * tmp_w, max_width); |
| tmp_h = min(2 * tmp_h, max_height); |
| mf->width = tmp_w; |
| mf->height = tmp_h; |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, |
| soc_camera_grp_id(icd), video, |
| s_mbus_fmt, mf); |
| dev_geo(dev, "Camera scaled to %ux%u\n", |
| mf->width, mf->height); |
| if (ret < 0) { |
| /* This shouldn't happen */ |
| dev_err(dev, "Client failed to set format: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| update_cache: |
| /* Update cache */ |
| ret = client_g_rect(sd, &cam->rect); |
| if (ret < 0) |
| return ret; |
| |
| if (ceu_1to1) |
| cam->subrect = cam->rect; |
| else |
| update_subrect(cam); |
| |
| return 0; |
| } |
| |
| /** |
| * @width - on output: user width, mapped back to input |
| * @height - on output: user height, mapped back to input |
| * @mf - in- / output camera output window |
| */ |
| static int client_scale(struct soc_camera_device *icd, |
| struct v4l2_mbus_framefmt *mf, |
| unsigned int *width, unsigned int *height, |
| bool ceu_can_scale) |
| { |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct device *dev = icd->parent; |
| struct v4l2_mbus_framefmt mf_tmp = *mf; |
| unsigned int scale_h, scale_v; |
| int ret; |
| |
| /* |
| * 5. Apply iterative camera S_FMT for camera user window (also updates |
| * client crop cache and the imaginary sub-rectangle). |
| */ |
| ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale); |
| if (ret < 0) |
| return ret; |
| |
| dev_geo(dev, "5: camera scaled to %ux%u\n", |
| mf_tmp.width, mf_tmp.height); |
| |
| /* 6. Retrieve camera output window (g_fmt) */ |
| |
| /* unneeded - it is already in "mf_tmp" */ |
| |
| /* 7. Calculate new client scales. */ |
| scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width); |
| scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height); |
| |
| mf->width = mf_tmp.width; |
| mf->height = mf_tmp.height; |
| mf->colorspace = mf_tmp.colorspace; |
| |
| /* |
| * 8. Calculate new CEU crop - apply camera scales to previously |
| * updated "effective" crop. |
| */ |
| *width = scale_down(cam->subrect.width, scale_h); |
| *height = scale_down(cam->subrect.height, scale_v); |
| |
| dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height); |
| |
| return 0; |
| } |
| |
| /* |
| * CEU can scale and crop, but we don't want to waste bandwidth and kill the |
| * framerate by always requesting the maximum image from the client. See |
| * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of |
| * scaling and cropping algorithms and for the meaning of referenced here steps. |
| */ |
| static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd, |
| struct v4l2_crop *a) |
| { |
| struct v4l2_rect *rect = &a->c; |
| struct device *dev = icd->parent; |
| struct soc_camera_host *ici = to_soc_camera_host(dev); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct v4l2_crop cam_crop; |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct v4l2_rect *cam_rect = &cam_crop.c; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct v4l2_mbus_framefmt mf; |
| unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v, |
| out_width, out_height; |
| int interm_width, interm_height; |
| u32 capsr, cflcr; |
| int ret; |
| |
| dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height, |
| rect->left, rect->top); |
| |
| /* During camera cropping its output window can change too, stop CEU */ |
| capsr = capture_save_reset(pcdev); |
| dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr); |
| |
| /* |
| * 1. - 2. Apply iterative camera S_CROP for new input window, read back |
| * actual camera rectangle. |
| */ |
| ret = client_s_crop(icd, a, &cam_crop); |
| if (ret < 0) |
| return ret; |
| |
| dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n", |
| cam_rect->width, cam_rect->height, |
| cam_rect->left, cam_rect->top); |
| |
| /* On success cam_crop contains current camera crop */ |
| |
| /* 3. Retrieve camera output window */ |
| ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| if (mf.width > pcdev->max_width || mf.height > pcdev->max_height) |
| return -EINVAL; |
| |
| /* 4. Calculate camera scales */ |
| scale_cam_h = calc_generic_scale(cam_rect->width, mf.width); |
| scale_cam_v = calc_generic_scale(cam_rect->height, mf.height); |
| |
| /* Calculate intermediate window */ |
| interm_width = scale_down(rect->width, scale_cam_h); |
| interm_height = scale_down(rect->height, scale_cam_v); |
| |
| if (interm_width < icd->user_width) { |
| u32 new_scale_h; |
| |
| new_scale_h = calc_generic_scale(rect->width, icd->user_width); |
| |
| mf.width = scale_down(cam_rect->width, new_scale_h); |
| } |
| |
| if (interm_height < icd->user_height) { |
| u32 new_scale_v; |
| |
| new_scale_v = calc_generic_scale(rect->height, icd->user_height); |
| |
| mf.height = scale_down(cam_rect->height, new_scale_v); |
| } |
| |
| if (interm_width < icd->user_width || interm_height < icd->user_height) { |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, |
| soc_camera_grp_id(icd), video, |
| s_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height); |
| scale_cam_h = calc_generic_scale(cam_rect->width, mf.width); |
| scale_cam_v = calc_generic_scale(cam_rect->height, mf.height); |
| interm_width = scale_down(rect->width, scale_cam_h); |
| interm_height = scale_down(rect->height, scale_cam_v); |
| } |
| |
| /* Cache camera output window */ |
| cam->width = mf.width; |
| cam->height = mf.height; |
| |
| if (pcdev->image_mode) { |
| out_width = min(interm_width, icd->user_width); |
| out_height = min(interm_height, icd->user_height); |
| } else { |
| out_width = interm_width; |
| out_height = interm_height; |
| } |
| |
| /* |
| * 5. Calculate CEU scales from camera scales from results of (5) and |
| * the user window |
| */ |
| scale_ceu_h = calc_scale(interm_width, &out_width); |
| scale_ceu_v = calc_scale(interm_height, &out_height); |
| |
| dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v); |
| |
| /* Apply CEU scales. */ |
| cflcr = scale_ceu_h | (scale_ceu_v << 16); |
| if (cflcr != pcdev->cflcr) { |
| pcdev->cflcr = cflcr; |
| ceu_write(pcdev, CFLCR, cflcr); |
| } |
| |
| icd->user_width = out_width & ~3; |
| icd->user_height = out_height & ~3; |
| /* Offsets are applied at the CEU scaling filter input */ |
| cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1; |
| cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1; |
| |
| /* 6. Use CEU cropping to crop to the new window. */ |
| sh_mobile_ceu_set_rect(icd); |
| |
| cam->subrect = *rect; |
| |
| dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n", |
| icd->user_width, icd->user_height, |
| cam->ceu_left, cam->ceu_top); |
| |
| /* Restore capture. The CE bit can be cleared by the hardware */ |
| if (pcdev->active) |
| capsr |= 1; |
| capture_restore(pcdev, capsr); |
| |
| /* Even if only camera cropping succeeded */ |
| return ret; |
| } |
| |
| static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd, |
| struct v4l2_crop *a) |
| { |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| |
| a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| a->c = cam->subrect; |
| |
| return 0; |
| } |
| |
| /* |
| * Calculate real client output window by applying new scales to the current |
| * client crop. New scales are calculated from the requested output format and |
| * CEU crop, mapped backed onto the client input (subrect). |
| */ |
| static void calculate_client_output(struct soc_camera_device *icd, |
| const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf) |
| { |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct device *dev = icd->parent; |
| struct v4l2_rect *cam_subrect = &cam->subrect; |
| unsigned int scale_v, scale_h; |
| |
| if (cam_subrect->width == cam->rect.width && |
| cam_subrect->height == cam->rect.height) { |
| /* No sub-cropping */ |
| mf->width = pix->width; |
| mf->height = pix->height; |
| return; |
| } |
| |
| /* 1.-2. Current camera scales and subwin - cached. */ |
| |
| dev_geo(dev, "2: subwin %ux%u@%u:%u\n", |
| cam_subrect->width, cam_subrect->height, |
| cam_subrect->left, cam_subrect->top); |
| |
| /* |
| * 3. Calculate new combined scales from input sub-window to requested |
| * user window. |
| */ |
| |
| /* |
| * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF |
| * (128x96) or larger than VGA |
| */ |
| scale_h = calc_generic_scale(cam_subrect->width, pix->width); |
| scale_v = calc_generic_scale(cam_subrect->height, pix->height); |
| |
| dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v); |
| |
| /* |
| * 4. Calculate desired client output window by applying combined scales |
| * to client (real) input window. |
| */ |
| mf->width = scale_down(cam->rect.width, scale_h); |
| mf->height = scale_down(cam->rect.height, scale_v); |
| } |
| |
| /* Similar to set_crop multistage iterative algorithm */ |
| static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, |
| struct v4l2_format *f) |
| { |
| struct device *dev = icd->parent; |
| struct soc_camera_host *ici = to_soc_camera_host(dev); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| struct v4l2_mbus_framefmt mf; |
| __u32 pixfmt = pix->pixelformat; |
| const struct soc_camera_format_xlate *xlate; |
| /* Keep Compiler Happy */ |
| unsigned int ceu_sub_width = 0, ceu_sub_height = 0; |
| u16 scale_v, scale_h; |
| int ret; |
| bool image_mode; |
| enum v4l2_field field; |
| |
| switch (pix->field) { |
| default: |
| pix->field = V4L2_FIELD_NONE; |
| /* fall-through */ |
| case V4L2_FIELD_INTERLACED_TB: |
| case V4L2_FIELD_INTERLACED_BT: |
| case V4L2_FIELD_NONE: |
| field = pix->field; |
| break; |
| case V4L2_FIELD_INTERLACED: |
| field = V4L2_FIELD_INTERLACED_TB; |
| break; |
| } |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(dev, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| /* 1.-4. Calculate desired client output geometry */ |
| calculate_client_output(icd, pix, &mf); |
| mf.field = pix->field; |
| mf.colorspace = pix->colorspace; |
| mf.code = xlate->code; |
| |
| switch (pixfmt) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV21: |
| case V4L2_PIX_FMT_NV16: |
| case V4L2_PIX_FMT_NV61: |
| image_mode = true; |
| break; |
| default: |
| image_mode = false; |
| } |
| |
| dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code, |
| pix->width, pix->height); |
| |
| dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height); |
| |
| /* 5. - 9. */ |
| ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height, |
| image_mode && V4L2_FIELD_NONE == field); |
| |
| dev_geo(dev, "5-9: client scale return %d\n", ret); |
| |
| /* Done with the camera. Now see if we can improve the result */ |
| |
| dev_geo(dev, "fmt %ux%u, requested %ux%u\n", |
| mf.width, mf.height, pix->width, pix->height); |
| if (ret < 0) |
| return ret; |
| |
| if (mf.code != xlate->code) |
| return -EINVAL; |
| |
| /* 9. Prepare CEU crop */ |
| cam->width = mf.width; |
| cam->height = mf.height; |
| |
| /* 10. Use CEU scaling to scale to the requested user window. */ |
| |
| /* We cannot scale up */ |
| if (pix->width > ceu_sub_width) |
| ceu_sub_width = pix->width; |
| |
| if (pix->height > ceu_sub_height) |
| ceu_sub_height = pix->height; |
| |
| pix->colorspace = mf.colorspace; |
| |
| if (image_mode) { |
| /* Scale pix->{width x height} down to width x height */ |
| scale_h = calc_scale(ceu_sub_width, &pix->width); |
| scale_v = calc_scale(ceu_sub_height, &pix->height); |
| } else { |
| pix->width = ceu_sub_width; |
| pix->height = ceu_sub_height; |
| scale_h = 0; |
| scale_v = 0; |
| } |
| |
| pcdev->cflcr = scale_h | (scale_v << 16); |
| |
| /* |
| * We have calculated CFLCR, the actual configuration will be performed |
| * in sh_mobile_ceu_set_bus_param() |
| */ |
| |
| dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n", |
| ceu_sub_width, scale_h, pix->width, |
| ceu_sub_height, scale_v, pix->height); |
| |
| cam->code = xlate->code; |
| icd->current_fmt = xlate; |
| |
| pcdev->field = field; |
| pcdev->image_mode = image_mode; |
| |
| /* CFSZR requirement */ |
| pix->width &= ~3; |
| pix->height &= ~3; |
| |
| return 0; |
| } |
| |
| static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, |
| struct v4l2_format *f) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| const struct soc_camera_format_xlate *xlate; |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct v4l2_mbus_framefmt mf; |
| __u32 pixfmt = pix->pixelformat; |
| int width, height; |
| int ret; |
| |
| dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n", |
| pixfmt, pix->width, pix->height); |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(icd->parent, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| /* FIXME: calculate using depth and bus width */ |
| |
| /* CFSZR requires height and width to be 4-pixel aligned */ |
| v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2, |
| &pix->height, 4, pcdev->max_height, 2, 0); |
| |
| width = pix->width; |
| height = pix->height; |
| |
| /* limit to sensor capabilities */ |
| mf.width = pix->width; |
| mf.height = pix->height; |
| mf.field = pix->field; |
| mf.code = xlate->code; |
| mf.colorspace = pix->colorspace; |
| |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd), |
| video, try_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| pix->width = mf.width; |
| pix->height = mf.height; |
| pix->field = mf.field; |
| pix->colorspace = mf.colorspace; |
| |
| switch (pixfmt) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV21: |
| case V4L2_PIX_FMT_NV16: |
| case V4L2_PIX_FMT_NV61: |
| /* FIXME: check against rect_max after converting soc-camera */ |
| /* We can scale precisely, need a bigger image from camera */ |
| if (pix->width < width || pix->height < height) { |
| /* |
| * We presume, the sensor behaves sanely, i.e., if |
| * requested a bigger rectangle, it will not return a |
| * smaller one. |
| */ |
| mf.width = pcdev->max_width; |
| mf.height = pcdev->max_height; |
| ret = v4l2_device_call_until_err(sd->v4l2_dev, |
| soc_camera_grp_id(icd), video, |
| try_mbus_fmt, &mf); |
| if (ret < 0) { |
| /* Shouldn't actually happen... */ |
| dev_err(icd->parent, |
| "FIXME: client try_fmt() = %d\n", ret); |
| return ret; |
| } |
| } |
| /* We will scale exactly */ |
| if (mf.width > width) |
| pix->width = width; |
| if (mf.height > height) |
| pix->height = height; |
| } |
| |
| pix->width &= ~3; |
| pix->height &= ~3; |
| |
| dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n", |
| __func__, ret, pix->pixelformat, pix->width, pix->height); |
| |
| return ret; |
| } |
| |
| static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd, |
| struct v4l2_crop *a) |
| { |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| u32 out_width = icd->user_width, out_height = icd->user_height; |
| int ret; |
| |
| /* Freeze queue */ |
| pcdev->frozen = 1; |
| /* Wait for frame */ |
| ret = wait_for_completion_interruptible(&pcdev->complete); |
| /* Stop the client */ |
| ret = v4l2_subdev_call(sd, video, s_stream, 0); |
| if (ret < 0) |
| dev_warn(icd->parent, |
| "Client failed to stop the stream: %d\n", ret); |
| else |
| /* Do the crop, if it fails, there's nothing more we can do */ |
| sh_mobile_ceu_set_crop(icd, a); |
| |
| dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height); |
| |
| if (icd->user_width != out_width || icd->user_height != out_height) { |
| struct v4l2_format f = { |
| .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| .fmt.pix = { |
| .width = out_width, |
| .height = out_height, |
| .pixelformat = icd->current_fmt->host_fmt->fourcc, |
| .field = pcdev->field, |
| .colorspace = icd->colorspace, |
| }, |
| }; |
| ret = sh_mobile_ceu_set_fmt(icd, &f); |
| if (!ret && (out_width != f.fmt.pix.width || |
| out_height != f.fmt.pix.height)) |
| ret = -EINVAL; |
| if (!ret) { |
| icd->user_width = out_width & ~3; |
| icd->user_height = out_height & ~3; |
| ret = sh_mobile_ceu_set_bus_param(icd); |
| } |
| } |
| |
| /* Thaw the queue */ |
| pcdev->frozen = 0; |
| spin_lock_irq(&pcdev->lock); |
| sh_mobile_ceu_capture(pcdev); |
| spin_unlock_irq(&pcdev->lock); |
| /* Start the client */ |
| ret = v4l2_subdev_call(sd, video, s_stream, 1); |
| return ret; |
| } |
| |
| static unsigned int sh_mobile_ceu_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 sh_mobile_ceu_querycap(struct soc_camera_host *ici, |
| struct v4l2_capability *cap) |
| { |
| strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); |
| cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| return 0; |
| } |
| |
| static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q, |
| struct soc_camera_device *icd) |
| { |
| q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| q->io_modes = VB2_MMAP | VB2_USERPTR; |
| q->drv_priv = icd; |
| q->ops = &sh_mobile_ceu_videobuf_ops; |
| q->mem_ops = &vb2_dma_contig_memops; |
| q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer); |
| |
| return vb2_queue_init(q); |
| } |
| |
| static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { |
| .owner = THIS_MODULE, |
| .add = sh_mobile_ceu_add_device, |
| .remove = sh_mobile_ceu_remove_device, |
| .get_formats = sh_mobile_ceu_get_formats, |
| .put_formats = sh_mobile_ceu_put_formats, |
| .get_crop = sh_mobile_ceu_get_crop, |
| .set_crop = sh_mobile_ceu_set_crop, |
| .set_livecrop = sh_mobile_ceu_set_livecrop, |
| .set_fmt = sh_mobile_ceu_set_fmt, |
| .try_fmt = sh_mobile_ceu_try_fmt, |
| .poll = sh_mobile_ceu_poll, |
| .querycap = sh_mobile_ceu_querycap, |
| .set_bus_param = sh_mobile_ceu_set_bus_param, |
| .init_videobuf2 = sh_mobile_ceu_init_videobuf, |
| }; |
| |
| struct bus_wait { |
| struct notifier_block notifier; |
| struct completion completion; |
| struct device *dev; |
| }; |
| |
| static int bus_notify(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct device *dev = data; |
| struct bus_wait *wait = container_of(nb, struct bus_wait, notifier); |
| |
| if (wait->dev != dev) |
| return NOTIFY_DONE; |
| |
| switch (action) { |
| case BUS_NOTIFY_UNBOUND_DRIVER: |
| /* Protect from module unloading */ |
| wait_for_completion(&wait->completion); |
| return NOTIFY_OK; |
| } |
| return NOTIFY_DONE; |
| } |
| |
| static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) |
| { |
| struct sh_mobile_ceu_dev *pcdev; |
| struct resource *res; |
| void __iomem *base; |
| unsigned int irq; |
| int err = 0; |
| struct bus_wait wait = { |
| .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion), |
| .notifier.notifier_call = bus_notify, |
| }; |
| struct sh_mobile_ceu_companion *csi2; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| irq = platform_get_irq(pdev, 0); |
| if (!res || (int)irq <= 0) { |
| dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); |
| err = -ENODEV; |
| goto exit; |
| } |
| |
| pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| if (!pcdev) { |
| dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
| err = -ENOMEM; |
| goto exit; |
| } |
| |
| INIT_LIST_HEAD(&pcdev->capture); |
| spin_lock_init(&pcdev->lock); |
| init_completion(&pcdev->complete); |
| |
| pcdev->pdata = pdev->dev.platform_data; |
| if (!pcdev->pdata) { |
| err = -EINVAL; |
| dev_err(&pdev->dev, "CEU platform data not set.\n"); |
| goto exit_kfree; |
| } |
| |
| pcdev->max_width = pcdev->pdata->max_width ? : 2560; |
| pcdev->max_height = pcdev->pdata->max_height ? : 1920; |
| |
| base = ioremap_nocache(res->start, resource_size(res)); |
| if (!base) { |
| err = -ENXIO; |
| dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); |
| goto exit_kfree; |
| } |
| |
| pcdev->irq = irq; |
| pcdev->base = base; |
| pcdev->video_limit = 0; /* only enabled if second resource exists */ |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| if (res) { |
| err = dma_declare_coherent_memory(&pdev->dev, res->start, |
| res->start, |
| resource_size(res), |
| DMA_MEMORY_MAP | |
| DMA_MEMORY_EXCLUSIVE); |
| if (!err) { |
| dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); |
| err = -ENXIO; |
| goto exit_iounmap; |
| } |
| |
| pcdev->video_limit = resource_size(res); |
| } |
| |
| /* request irq */ |
| err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, |
| dev_name(&pdev->dev), pcdev); |
| if (err) { |
| dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); |
| goto exit_release_mem; |
| } |
| |
| pm_suspend_ignore_children(&pdev->dev, true); |
| pm_runtime_enable(&pdev->dev); |
| pm_runtime_resume(&pdev->dev); |
| |
| pcdev->ici.priv = pcdev; |
| pcdev->ici.v4l2_dev.dev = &pdev->dev; |
| pcdev->ici.nr = pdev->id; |
| pcdev->ici.drv_name = dev_name(&pdev->dev); |
| pcdev->ici.ops = &sh_mobile_ceu_host_ops; |
| |
| pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); |
| if (IS_ERR(pcdev->alloc_ctx)) { |
| err = PTR_ERR(pcdev->alloc_ctx); |
| goto exit_free_clk; |
| } |
| |
| err = soc_camera_host_register(&pcdev->ici); |
| if (err) |
| goto exit_free_ctx; |
| |
| /* CSI2 interfacing */ |
| csi2 = pcdev->pdata->csi2; |
| if (csi2) { |
| struct platform_device *csi2_pdev = |
| platform_device_alloc("sh-mobile-csi2", csi2->id); |
| struct sh_csi2_pdata *csi2_pdata = csi2->platform_data; |
| |
| if (!csi2_pdev) { |
| err = -ENOMEM; |
| goto exit_host_unregister; |
| } |
| |
| pcdev->csi2_pdev = csi2_pdev; |
| |
| err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata)); |
| if (err < 0) |
| goto exit_pdev_put; |
| |
| csi2_pdata = csi2_pdev->dev.platform_data; |
| csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev; |
| |
| csi2_pdev->resource = csi2->resource; |
| csi2_pdev->num_resources = csi2->num_resources; |
| |
| err = platform_device_add(csi2_pdev); |
| if (err < 0) |
| goto exit_pdev_put; |
| |
| wait.dev = &csi2_pdev->dev; |
| |
| err = bus_register_notifier(&platform_bus_type, &wait.notifier); |
| if (err < 0) |
| goto exit_pdev_unregister; |
| |
| /* |
| * From this point the driver module will not unload, until |
| * we complete the completion. |
| */ |
| |
| if (!csi2_pdev->dev.driver) { |
| complete(&wait.completion); |
| /* Either too late, or probing failed */ |
| bus_unregister_notifier(&platform_bus_type, &wait.notifier); |
| err = -ENXIO; |
| goto exit_pdev_unregister; |
| } |
| |
| /* |
| * The module is still loaded, in the worst case it is hanging |
| * in device release on our completion. So, _now_ dereferencing |
| * the "owner" is safe! |
| */ |
| |
| err = try_module_get(csi2_pdev->dev.driver->owner); |
| |
| /* Let notifier complete, if it has been locked */ |
| complete(&wait.completion); |
| bus_unregister_notifier(&platform_bus_type, &wait.notifier); |
| if (!err) { |
| err = -ENODEV; |
| goto exit_pdev_unregister; |
| } |
| } |
| |
| return 0; |
| |
| exit_pdev_unregister: |
| platform_device_del(pcdev->csi2_pdev); |
| exit_pdev_put: |
| pcdev->csi2_pdev->resource = NULL; |
| platform_device_put(pcdev->csi2_pdev); |
| exit_host_unregister: |
| soc_camera_host_unregister(&pcdev->ici); |
| exit_free_ctx: |
| vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); |
| exit_free_clk: |
| pm_runtime_disable(&pdev->dev); |
| free_irq(pcdev->irq, pcdev); |
| exit_release_mem: |
| if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| dma_release_declared_memory(&pdev->dev); |
| exit_iounmap: |
| iounmap(base); |
| exit_kfree: |
| kfree(pcdev); |
| exit: |
| return err; |
| } |
| |
| static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev) |
| { |
| struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
| struct sh_mobile_ceu_dev *pcdev = container_of(soc_host, |
| struct sh_mobile_ceu_dev, ici); |
| struct platform_device *csi2_pdev = pcdev->csi2_pdev; |
| |
| soc_camera_host_unregister(soc_host); |
| pm_runtime_disable(&pdev->dev); |
| free_irq(pcdev->irq, pcdev); |
| if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| dma_release_declared_memory(&pdev->dev); |
| iounmap(pcdev->base); |
| vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); |
| if (csi2_pdev && csi2_pdev->dev.driver) { |
| struct module *csi2_drv = csi2_pdev->dev.driver->owner; |
| platform_device_del(csi2_pdev); |
| csi2_pdev->resource = NULL; |
| platform_device_put(csi2_pdev); |
| module_put(csi2_drv); |
| } |
| kfree(pcdev); |
| |
| return 0; |
| } |
| |
| static int sh_mobile_ceu_runtime_nop(struct device *dev) |
| { |
| /* Runtime PM callback shared between ->runtime_suspend() |
| * and ->runtime_resume(). Simply returns success. |
| * |
| * This driver re-initializes all registers after |
| * pm_runtime_get_sync() anyway so there is no need |
| * to save and restore registers here. |
| */ |
| return 0; |
| } |
| |
| static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = { |
| .runtime_suspend = sh_mobile_ceu_runtime_nop, |
| .runtime_resume = sh_mobile_ceu_runtime_nop, |
| }; |
| |
| static struct platform_driver sh_mobile_ceu_driver = { |
| .driver = { |
| .name = "sh_mobile_ceu", |
| .pm = &sh_mobile_ceu_dev_pm_ops, |
| }, |
| .probe = sh_mobile_ceu_probe, |
| .remove = __devexit_p(sh_mobile_ceu_remove), |
| }; |
| |
| static int __init sh_mobile_ceu_init(void) |
| { |
| /* Whatever return code */ |
| request_module("sh_mobile_csi2"); |
| return platform_driver_register(&sh_mobile_ceu_driver); |
| } |
| |
| static void __exit sh_mobile_ceu_exit(void) |
| { |
| platform_driver_unregister(&sh_mobile_ceu_driver); |
| } |
| |
| module_init(sh_mobile_ceu_init); |
| module_exit(sh_mobile_ceu_exit); |
| |
| MODULE_DESCRIPTION("SuperH Mobile CEU driver"); |
| MODULE_AUTHOR("Magnus Damm"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION("0.0.6"); |
| MODULE_ALIAS("platform:sh_mobile_ceu"); |