/* * 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 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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 */ /* per video frame buffer */ struct sh_mobile_ceu_buffer { struct videobuf_buffer vb; /* v4l buffer must be first */ const struct soc_camera_data_format *fmt; }; struct sh_mobile_ceu_dev { struct soc_camera_host ici; struct soc_camera_device *icd; unsigned int irq; void __iomem *base; unsigned long video_limit; /* lock used to protect videobuf */ spinlock_t lock; struct list_head capture; struct videobuf_buffer *active; struct sh_mobile_ceu_info *pdata; u32 cflcr; unsigned int is_interlaced:1; unsigned int image_mode:1; unsigned int is_16bit:1; }; struct sh_mobile_ceu_cam { struct v4l2_rect camera_rect; struct v4l2_rect camera_max; const struct soc_camera_data_format *extra_fmt; const struct soc_camera_data_format *camera_fmt; }; static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev) { unsigned long flags; flags = SOCAM_MASTER | SOCAM_PCLK_SAMPLE_RISING | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | SOCAM_DATA_ACTIVE_HIGH; if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS) flags |= SOCAM_DATAWIDTH_8; if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS) flags |= SOCAM_DATAWIDTH_16; if (flags & SOCAM_DATAWIDTH_MASK) return flags; return 0; } 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); } /* * Videobuf operations */ static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) { struct soc_camera_device *icd = vq->priv_data; struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3; *size = PAGE_ALIGN(icd->rect_current.width * icd->rect_current.height * bytes_per_pixel); if (0 == *count) *count = 2; if (pcdev->video_limit) { while (*size * *count > pcdev->video_limit) (*count)--; } dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); return 0; } static void free_buffer(struct videobuf_queue *vq, struct sh_mobile_ceu_buffer *buf) { struct soc_camera_device *icd = vq->priv_data; dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, &buf->vb, buf->vb.baddr, buf->vb.bsize); if (in_interrupt()) BUG(); videobuf_waiton(&buf->vb, 0, 0); videobuf_dma_contig_free(vq, &buf->vb); dev_dbg(&icd->dev, "%s freed\n", __func__); buf->vb.state = VIDEOBUF_NEEDS_INIT; } #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_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */ static void 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; /* 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_CPEIE); ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC); ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE); ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP); ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW); if (!pcdev->active) return; phys_addr_top = videobuf_to_dma_contig(pcdev->active); ceu_write(pcdev, CDAYR, phys_addr_top); if (pcdev->is_interlaced) { phys_addr_bottom = phys_addr_top + icd->rect_current.width; ceu_write(pcdev, CDBYR, phys_addr_bottom); } switch (icd->current_fmt->fourcc) { case V4L2_PIX_FMT_NV12: case V4L2_PIX_FMT_NV21: case V4L2_PIX_FMT_NV16: case V4L2_PIX_FMT_NV61: phys_addr_top += icd->rect_current.width * icd->rect_current.height; ceu_write(pcdev, CDACR, phys_addr_top); if (pcdev->is_interlaced) { phys_addr_bottom = phys_addr_top + icd->rect_current.width; ceu_write(pcdev, CDBCR, phys_addr_bottom); } } pcdev->active->state = VIDEOBUF_ACTIVE; ceu_write(pcdev, CAPSR, 0x1); /* start capture */ } static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, enum v4l2_field field) { struct soc_camera_device *icd = vq->priv_data; struct sh_mobile_ceu_buffer *buf; int ret; buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, vb, vb->baddr, vb->bsize); /* Added list head initialization on alloc */ WARN_ON(!list_empty(&vb->queue)); #ifdef DEBUG /* This can be useful if you want to see if we actually fill * the buffer with something */ memset((void *)vb->baddr, 0xaa, vb->bsize); #endif BUG_ON(NULL == icd->current_fmt); if (buf->fmt != icd->current_fmt || vb->width != icd->rect_current.width || vb->height != icd->rect_current.height || vb->field != field) { buf->fmt = icd->current_fmt; vb->width = icd->rect_current.width; vb->height = icd->rect_current.height; vb->field = field; vb->state = VIDEOBUF_NEEDS_INIT; } vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); if (0 != vb->baddr && vb->bsize < vb->size) { ret = -EINVAL; goto out; } if (vb->state == VIDEOBUF_NEEDS_INIT) { ret = videobuf_iolock(vq, vb, NULL); if (ret) goto fail; vb->state = VIDEOBUF_PREPARED; } return 0; fail: free_buffer(vq, buf); out: return ret; } /* Called under spinlock_irqsave(&pcdev->lock, ...) */ static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) { struct soc_camera_device *icd = vq->priv_data; struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, vb, vb->baddr, vb->bsize); vb->state = VIDEOBUF_QUEUED; list_add_tail(&vb->queue, &pcdev->capture); if (!pcdev->active) { pcdev->active = vb; sh_mobile_ceu_capture(pcdev); } } static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) { struct soc_camera_device *icd = vq->priv_data; struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; unsigned long flags; spin_lock_irqsave(&pcdev->lock, flags); if (pcdev->active == vb) { /* disable capture (release DMA buffer), reset */ ceu_write(pcdev, CAPSR, 1 << 16); pcdev->active = NULL; } if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) && !list_empty(&vb->queue)) { vb->state = VIDEOBUF_ERROR; list_del_init(&vb->queue); } spin_unlock_irqrestore(&pcdev->lock, flags); free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); } static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { .buf_setup = sh_mobile_ceu_videobuf_setup, .buf_prepare = sh_mobile_ceu_videobuf_prepare, .buf_queue = sh_mobile_ceu_videobuf_queue, .buf_release = sh_mobile_ceu_videobuf_release, }; static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) { struct sh_mobile_ceu_dev *pcdev = data; struct videobuf_buffer *vb; unsigned long flags; spin_lock_irqsave(&pcdev->lock, flags); vb = pcdev->active; if (!vb) /* Stale interrupt from a released buffer */ goto out; list_del_init(&vb->queue); if (!list_empty(&pcdev->capture)) pcdev->active = list_entry(pcdev->capture.next, struct videobuf_buffer, queue); else pcdev->active = NULL; sh_mobile_ceu_capture(pcdev); vb->state = VIDEOBUF_DONE; do_gettimeofday(&vb->ts); vb->field_count++; wake_up(&vb->done); out: spin_unlock_irqrestore(&pcdev->lock, flags); return IRQ_HANDLED; } /* 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->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; if (pcdev->icd) return -EBUSY; dev_info(&icd->dev, "SuperH Mobile CEU driver attached to camera %d\n", icd->devnum); clk_enable(pcdev->clk); ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ while (ceu_read(pcdev, CSTSR) & 1) msleep(1); 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->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; unsigned long flags; BUG_ON(icd != pcdev->icd); /* disable capture, disable interrupts */ ceu_write(pcdev, CEIER, 0); ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ /* make sure active buffer is canceled */ spin_lock_irqsave(&pcdev->lock, flags); if (pcdev->active) { list_del(&pcdev->active->queue); pcdev->active->state = VIDEOBUF_ERROR; wake_up_all(&pcdev->active->done); pcdev->active = NULL; } spin_unlock_irqrestore(&pcdev->lock, flags); clk_disable(pcdev->clk); dev_info(&icd->dev, "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 unsigned int size_src(unsigned int dst, unsigned int scale) { unsigned int mant_pre = scale >> 12, tmp; if (!dst || !scale) return dst; for (tmp = ((dst - 1) * scale + 2048 * mant_pre) / 4096 + 1; size_dst(tmp, scale) < dst; tmp++) ; return tmp; } 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 v4l2_rect *rect) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_cam *cam = icd->host_priv; struct sh_mobile_ceu_dev *pcdev = ici->priv; int width, height, cfszr_width, cdwdr_width, in_width, in_height; unsigned int left_offset, top_offset, left, top; unsigned int hscale = pcdev->cflcr & 0xffff; unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff; u32 camor; /* Switch to the camera scale */ left = size_src(rect->left, hscale); top = size_src(rect->top, vscale); dev_dbg(&icd->dev, "Left %u * 0x%x = %u, top %u * 0x%x = %u\n", rect->left, hscale, left, rect->top, vscale, top); if (left > cam->camera_rect.left) { left_offset = left - cam->camera_rect.left; } else { left_offset = 0; left = cam->camera_rect.left; } if (top > cam->camera_rect.top) { top_offset = top - cam->camera_rect.top; } else { top_offset = 0; top = cam->camera_rect.top; } dev_dbg(&icd->dev, "New left %u, top %u, offsets %u:%u\n", rect->left, rect->top, left_offset, top_offset); if (pcdev->image_mode) { width = rect->width; in_width = cam->camera_rect.width; if (!pcdev->is_16bit) { width *= 2; in_width *= 2; left_offset *= 2; } cfszr_width = cdwdr_width = rect->width; } else { unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3; if (!pcdev->is_16bit) w_factor *= 2; width = rect->width * w_factor / 2; in_width = cam->camera_rect.width * w_factor / 2; left_offset = left_offset * w_factor / 2; cfszr_width = pcdev->is_16bit ? width : width / 2; cdwdr_width = pcdev->is_16bit ? width * 2 : width; } height = rect->height; in_height = cam->camera_rect.height; if (pcdev->is_interlaced) { height /= 2; in_height /= 2; top_offset /= 2; cdwdr_width *= 2; } camor = left_offset | (top_offset << 16); ceu_write(pcdev, CAMOR, camor); ceu_write(pcdev, CAPWR, (in_height << 16) | in_width); ceu_write(pcdev, CFSZR, (height << 16) | cfszr_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); } static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; int ret; unsigned long camera_flags, common_flags, value; int yuv_lineskip; struct sh_mobile_ceu_cam *cam = icd->host_priv; u32 capsr = capture_save_reset(pcdev); camera_flags = icd->ops->query_bus_param(icd); common_flags = soc_camera_bus_param_compatible(camera_flags, make_bus_param(pcdev)); if (!common_flags) return -EINVAL; ret = icd->ops->set_bus_param(icd, common_flags); if (ret < 0) return ret; switch (common_flags & SOCAM_DATAWIDTH_MASK) { case SOCAM_DATAWIDTH_8: pcdev->is_16bit = 0; break; case SOCAM_DATAWIDTH_16: pcdev->is_16bit = 1; break; default: return -EINVAL; } ceu_write(pcdev, CRCNTR, 0); ceu_write(pcdev, CRCMPR, 0); value = 0x00000010; /* data fetch by default */ yuv_lineskip = 0; switch (icd->current_fmt->fourcc) { case V4L2_PIX_FMT_NV12: case V4L2_PIX_FMT_NV21: yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */ /* fall-through */ case V4L2_PIX_FMT_NV16: case V4L2_PIX_FMT_NV61: switch (cam->camera_fmt->fourcc) { case V4L2_PIX_FMT_UYVY: value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ break; case V4L2_PIX_FMT_VYUY: value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ break; case V4L2_PIX_FMT_YUYV: value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ break; case V4L2_PIX_FMT_YVYU: value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */ break; default: BUG(); } } if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 || icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61) value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */ value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0; value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0; value |= pcdev->is_16bit ? 1 << 12 : 0; ceu_write(pcdev, CAMCR, value); ceu_write(pcdev, CAPCR, 0x00300000); ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0); mdelay(1); sh_mobile_ceu_set_rect(icd, &icd->rect_current); 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 = 0x00000017; if (yuv_lineskip) value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */ ceu_write(pcdev, CDOCR, value); ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ dev_dbg(&icd->dev, "S_FMT successful for %c%c%c%c %ux%u@%u:%u\n", pixfmt & 0xff, (pixfmt >> 8) & 0xff, (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff, icd->rect_current.width, icd->rect_current.height, icd->rect_current.left, icd->rect_current.top); 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) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; unsigned long camera_flags, common_flags; camera_flags = icd->ops->query_bus_param(icd); common_flags = soc_camera_bus_param_compatible(camera_flags, make_bus_param(pcdev)); if (!common_flags) return -EINVAL; return 0; } static const struct soc_camera_data_format sh_mobile_ceu_formats[] = { { .name = "NV12", .depth = 12, .fourcc = V4L2_PIX_FMT_NV12, .colorspace = V4L2_COLORSPACE_JPEG, }, { .name = "NV21", .depth = 12, .fourcc = V4L2_PIX_FMT_NV21, .colorspace = V4L2_COLORSPACE_JPEG, }, { .name = "NV16", .depth = 16, .fourcc = V4L2_PIX_FMT_NV16, .colorspace = V4L2_COLORSPACE_JPEG, }, { .name = "NV61", .depth = 16, .fourcc = V4L2_PIX_FMT_NV61, .colorspace = V4L2_COLORSPACE_JPEG, }, }; static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx, struct soc_camera_format_xlate *xlate) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); int ret, k, n; int formats = 0; struct sh_mobile_ceu_cam *cam; ret = sh_mobile_ceu_try_bus_param(icd); if (ret < 0) return 0; if (!icd->host_priv) { cam = kzalloc(sizeof(*cam), GFP_KERNEL); if (!cam) return -ENOMEM; icd->host_priv = cam; cam->camera_max = icd->rect_max; } else { cam = icd->host_priv; } /* Beginning of a pass */ if (!idx) cam->extra_fmt = NULL; switch (icd->formats[idx].fourcc) { case V4L2_PIX_FMT_UYVY: case V4L2_PIX_FMT_VYUY: case V4L2_PIX_FMT_YUYV: case V4L2_PIX_FMT_YVYU: if (cam->extra_fmt) goto add_single_format; /* * 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 = (void *)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->cam_fmt = icd->formats + idx; xlate->buswidth = icd->formats[idx].depth; xlate++; dev_dbg(ici->v4l2_dev.dev, "Providing format %s using %s\n", sh_mobile_ceu_formats[k].name, icd->formats[idx].name); } default: add_single_format: /* Generic pass-through */ formats++; if (xlate) { xlate->host_fmt = icd->formats + idx; xlate->cam_fmt = icd->formats + idx; xlate->buswidth = icd->formats[idx].depth; xlate++; dev_dbg(ici->v4l2_dev.dev, "Providing format %s in pass-through mode\n", icd->formats[idx].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; } /* * 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. For * cropping we also have to take care of the current scale. The common for both * scaling and cropping 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 sh_mobile_ceu_set_crop(struct soc_camera_device *icd, struct v4l2_crop *a) { struct v4l2_rect *rect = &a->c; struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; struct v4l2_crop cam_crop; struct v4l2_rect *cam_rect = &cam_crop.c, target, cam_max; struct sh_mobile_ceu_cam *cam = icd->host_priv; struct device *control = to_soc_camera_control(icd); struct v4l2_subdev *sd = dev_get_drvdata(control); unsigned int hscale = pcdev->cflcr & 0xffff; unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff; unsigned short width, height; u32 capsr; int ret; /* Scale back up into client units */ cam_rect->left = size_src(rect->left, hscale); cam_rect->width = size_src(rect->width, hscale); cam_rect->top = size_src(rect->top, vscale); cam_rect->height = size_src(rect->height, vscale); target = *cam_rect; capsr = capture_save_reset(pcdev); dev_dbg(&icd->dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr); /* First attempt - see if the client can deliver a perfect result */ ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop); if (!ret && !memcmp(&target, &cam_rect, sizeof(target))) { dev_dbg(&icd->dev, "Camera S_CROP successful for %ux%u@%u:%u\n", cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top); goto ceu_set_rect; } /* Try to fix cropping, that camera hasn't managed to do */ dev_dbg(&icd->dev, "Fix camera S_CROP %d for %ux%u@%u:%u" " to %ux%u@%u:%u\n", ret, cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top, target.width, target.height, target.left, target.top); /* * Popular special case - some cameras can only handle fixed sizes like * QVGA, VGA,... Take care to avoid infinite loop. */ width = max(cam_rect->width, 1); height = max(cam_rect->height, 1); cam_max.width = size_src(icd->rect_max.width, hscale); cam_max.left = size_src(icd->rect_max.left, hscale); cam_max.height = size_src(icd->rect_max.height, vscale); cam_max.top = size_src(icd->rect_max.top, vscale); while (!ret && (is_smaller(cam_rect, &target) || is_inside(cam_rect, &target)) && cam_max.width >= width && cam_max.height >= height) { width *= 2; height *= 2; cam_rect->width = width; cam_rect->height = height; /* We do not know what the camera is capable of, play safe */ if (cam_rect->left > target.left) cam_rect->left = cam_max.left; if (cam_rect->left + cam_rect->width < target.left + target.width) cam_rect->width = target.left + target.width - cam_rect->left; if (cam_rect->top > target.top) cam_rect->top = cam_max.top; if (cam_rect->top + cam_rect->height < target.top + target.height) cam_rect->height = target.top + target.height - cam_rect->top; if (cam_rect->width + cam_rect->left > cam_max.width + cam_max.left) cam_rect->left = max(cam_max.width + cam_max.left - cam_rect->width, cam_max.left); if (cam_rect->height + cam_rect->top > cam_max.height + cam_max.top) cam_rect->top = max(cam_max.height + cam_max.top - cam_rect->height, cam_max.top); ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop); dev_dbg(&icd->dev, "Camera S_CROP %d for %ux%u@%u:%u\n", ret, cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top); } /* * If the camera failed to configure cropping, it should not modify the * rectangle */ if ((ret < 0 && (is_smaller(&icd->rect_current, rect) || is_inside(&icd->rect_current, rect))) || is_smaller(cam_rect, &target) || is_inside(cam_rect, &target)) { /* * The camera failed to configure a suitable cropping, * we cannot use the current rectangle, set to max */ *cam_rect = cam_max; ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop); dev_dbg(&icd->dev, "Camera S_CROP %d for max %ux%u@%u:%u\n", ret, cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top); if (ret < 0 && ret != -ENOIOCTLCMD) /* All failed, hopefully resume current capture */ goto resume_capture; /* Finally, adjust the target rectangle */ if (target.width > cam_rect->width) target.width = cam_rect->width; if (target.height > cam_rect->height) target.height = cam_rect->height; if (target.left + target.width > cam_rect->left + cam_rect->width) target.left = cam_rect->left + cam_rect->width - target.width; if (target.top + target.height > cam_rect->top + cam_rect->height) target.top = cam_rect->top + cam_rect->height - target.height; } /* We now have a rectangle, larger than requested, let's crop */ /* * We have to preserve camera rectangle between close() / open(), * because soc-camera core calls .set_fmt() on each first open() with * last before last close() _user_ rectangle, which can be different * from camera rectangle. */ dev_dbg(&icd->dev, "SH S_CROP from %ux%u@%u:%u to %ux%u@%u:%u, scale to %ux%u@%u:%u\n", cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top, target.width, target.height, target.left, target.top, rect->width, rect->height, rect->left, rect->top); ret = 0; ceu_set_rect: cam->camera_rect = *cam_rect; rect->width = size_dst(target.width, hscale); rect->left = size_dst(target.left, hscale); rect->height = size_dst(target.height, vscale); rect->top = size_dst(target.top, vscale); sh_mobile_ceu_set_rect(icd, rect); resume_capture: /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */ if (pcdev->active) capsr |= 1; capture_restore(pcdev, capsr); /* Even if only camera cropping succeeded */ return ret; } /* Similar to set_crop multistage iterative algorithm */ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, struct v4l2_format *f) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); 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; __u32 pixfmt = pix->pixelformat; const struct soc_camera_format_xlate *xlate; unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h; u16 vscale, hscale; int ret, is_interlaced; switch (pix->field) { case V4L2_FIELD_INTERLACED: is_interlaced = 1; break; case V4L2_FIELD_ANY: default: pix->field = V4L2_FIELD_NONE; /* fall-through */ case V4L2_FIELD_NONE: is_interlaced = 0; break; } xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); if (!xlate) { dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt); return -EINVAL; } pix->pixelformat = xlate->cam_fmt->fourcc; ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f); pix->pixelformat = pixfmt; dev_dbg(&icd->dev, "Camera %d fmt %ux%u, requested %ux%u, max %ux%u\n", ret, pix->width, pix->height, width, height, icd->rect_max.width, icd->rect_max.height); if (ret < 0) return ret; switch (pixfmt) { case V4L2_PIX_FMT_NV12: case V4L2_PIX_FMT_NV21: case V4L2_PIX_FMT_NV16: case V4L2_PIX_FMT_NV61: pcdev->image_mode = 1; break; default: pcdev->image_mode = 0; } if ((abs(width - pix->width) < 4 && abs(height - pix->height) < 4) || !pcdev->image_mode || is_interlaced) { hscale = 0; vscale = 0; goto out; } /* Camera set a format, but geometry is not precise, try to improve */ /* * FIXME: when soc-camera is converted to implement traditional S_FMT * and S_CROP semantics, replace CEU limits with camera maxima */ tmp_w = pix->width; tmp_h = pix->height; while ((width > tmp_w || height > tmp_h) && tmp_w < 2560 && tmp_h < 1920) { tmp_w = min(2 * tmp_w, (__u32)2560); tmp_h = min(2 * tmp_h, (__u32)1920); pix->width = tmp_w; pix->height = tmp_h; pix->pixelformat = xlate->cam_fmt->fourcc; ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f); pix->pixelformat = pixfmt; dev_dbg(&icd->dev, "Camera scaled to %ux%u\n", pix->width, pix->height); if (ret < 0) { /* This shouldn't happen */ dev_err(&icd->dev, "Client failed to set format: %d\n", ret); return ret; } } /* We cannot scale up */ if (width > pix->width) width = pix->width; if (height > pix->height) height = pix->height; /* Let's rock: scale pix->{width x height} down to width x height */ hscale = calc_scale(pix->width, &width); vscale = calc_scale(pix->height, &height); dev_dbg(&icd->dev, "W: %u : 0x%x = %u, H: %u : 0x%x = %u\n", pix->width, hscale, width, pix->height, vscale, height); out: pcdev->cflcr = hscale | (vscale << 16); icd->buswidth = xlate->buswidth; icd->current_fmt = xlate->host_fmt; cam->camera_fmt = xlate->cam_fmt; cam->camera_rect.width = pix->width; cam->camera_rect.height = pix->height; icd->rect_max.left = size_dst(cam->camera_max.left, hscale); icd->rect_max.width = size_dst(cam->camera_max.width, hscale); icd->rect_max.top = size_dst(cam->camera_max.top, vscale); icd->rect_max.height = size_dst(cam->camera_max.height, vscale); icd->rect_current.left = icd->rect_max.left; icd->rect_current.top = icd->rect_max.top; pcdev->is_interlaced = is_interlaced; pix->width = width; pix->height = height; 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->dev.parent); const struct soc_camera_format_xlate *xlate; struct v4l2_pix_format *pix = &f->fmt.pix; __u32 pixfmt = pix->pixelformat; int width, height; int ret; xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); if (!xlate) { dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt); return -EINVAL; } /* FIXME: calculate using depth and bus width */ v4l_bound_align_image(&pix->width, 2, 2560, 1, &pix->height, 4, 1920, 2, 0); width = pix->width; height = pix->height; pix->bytesperline = pix->width * DIV_ROUND_UP(xlate->host_fmt->depth, 8); pix->sizeimage = pix->height * pix->bytesperline; pix->pixelformat = xlate->cam_fmt->fourcc; /* limit to sensor capabilities */ ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, try_fmt, f); pix->pixelformat = pixfmt; if (ret < 0) return ret; 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) { int tmp_w = pix->width, tmp_h = pix->height; pix->width = 2560; pix->height = 1920; ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, try_fmt, f); if (ret < 0) { /* Shouldn't actually happen... */ dev_err(&icd->dev, "FIXME: try_fmt() returned %d\n", ret); pix->width = tmp_w; pix->height = tmp_h; } } if (pix->width > width) pix->width = width; if (pix->height > height) pix->height = height; } return ret; } static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, struct v4l2_requestbuffers *p) { int i; /* This is for locking debugging only. I removed spinlocks and now I * check whether .prepare is ever called on a linked buffer, or whether * a dma IRQ can occur for an in-work or unlinked buffer. Until now * it hadn't triggered */ for (i = 0; i < p->count; i++) { struct sh_mobile_ceu_buffer *buf; buf = container_of(icf->vb_vidq.bufs[i], struct sh_mobile_ceu_buffer, vb); INIT_LIST_HEAD(&buf->vb.queue); } return 0; } static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) { struct soc_camera_file *icf = file->private_data; struct sh_mobile_ceu_buffer *buf; buf = list_entry(icf->vb_vidq.stream.next, struct sh_mobile_ceu_buffer, vb.stream); poll_wait(file, &buf->vb.done, pt); if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR) return POLLIN|POLLRDNORM; return 0; } 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->version = KERNEL_VERSION(0, 0, 5); cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; return 0; } static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, struct soc_camera_device *icd) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; videobuf_queue_dma_contig_init(q, &sh_mobile_ceu_videobuf_ops, ici->v4l2_dev.dev, &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, pcdev->is_interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE, sizeof(struct sh_mobile_ceu_buffer), icd); } static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd, struct v4l2_control *ctrl) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; u32 val; switch (ctrl->id) { case V4L2_CID_SHARPNESS: val = ceu_read(pcdev, CLFCR); ctrl->value = val ^ 1; return 0; } return -ENOIOCTLCMD; } static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd, struct v4l2_control *ctrl) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_dev *pcdev = ici->priv; switch (ctrl->id) { case V4L2_CID_SHARPNESS: switch (icd->current_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->value); return 0; } return -EINVAL; } return -ENOIOCTLCMD; } static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = { { .id = V4L2_CID_SHARPNESS, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Low-pass filter", .minimum = 0, .maximum = 1, .step = 1, .default_value = 0, }, }; 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, .set_crop = sh_mobile_ceu_set_crop, .set_fmt = sh_mobile_ceu_set_fmt, .try_fmt = sh_mobile_ceu_try_fmt, .set_ctrl = sh_mobile_ceu_set_ctrl, .get_ctrl = sh_mobile_ceu_get_ctrl, .reqbufs = sh_mobile_ceu_reqbufs, .poll = sh_mobile_ceu_poll, .querycap = sh_mobile_ceu_querycap, .set_bus_param = sh_mobile_ceu_set_bus_param, .init_videobuf = sh_mobile_ceu_init_videobuf, .controls = sh_mobile_ceu_controls, .num_controls = ARRAY_SIZE(sh_mobile_ceu_controls), }; 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; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); if (!res || !irq) { 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); pcdev->pdata = pdev->dev.platform_data; if (!pcdev->pdata) { err = -EINVAL; dev_err(&pdev->dev, "CEU platform data not set.\n"); goto exit_kfree; } 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; err = soc_camera_host_register(&pcdev->ici); if (err) goto exit_free_irq; return 0; exit_free_irq: 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); soc_camera_host_unregister(soc_host); free_irq(pcdev->irq, pcdev); if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) dma_release_declared_memory(&pdev->dev); iounmap(pcdev->base); 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 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 = __exit_p(sh_mobile_ceu_remove), }; static int __init sh_mobile_ceu_init(void) { 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_ALIAS("platform:sh_mobile_ceu");