/* * 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/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/version.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/videobuf-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 videobuf_buffer vb; /* v4l buffer must be first */ enum v4l2_mbus_pixelcode code; }; 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; enum v4l2_field field; unsigned int image_mode:1; unsigned int is_16bit:1; }; struct sh_mobile_ceu_cam { struct v4l2_rect ceu_rect; unsigned int cam_width; unsigned int cam_height; const struct soc_mbus_pixelfmt *extra_fmt; enum v4l2_mbus_pixelcode code; }; 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); } 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->dev, "soft reset time out\n"); return -EIO; } return 0; } /* * 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_line = soc_mbus_bytes_per_line(icd->user_width, icd->current_fmt->host_fmt); if (bytes_per_line < 0) return bytes_per_line; *size = bytes_per_line * icd->user_height; if (0 == *count) *count = 2; if (pcdev->video_limit) { while (PAGE_ALIGN(*size) * *count > pcdev->video_limit) (*count)--; } dev_dbg(icd->dev.parent, "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; struct device *dev = icd->dev.parent; dev_dbg(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(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_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; 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); 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->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 = videobuf_to_dma_contig(pcdev->active); ceu_write(pcdev, top1, phys_addr_top); if (V4L2_FIELD_NONE != pcdev->field) { phys_addr_bottom = phys_addr_top + icd->user_width; ceu_write(pcdev, bottom1, phys_addr_bottom); } 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: 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); } } pcdev->active->state = VIDEOBUF_ACTIVE; ceu_write(pcdev, CAPSR, 0x1); /* start capture */ return ret; } 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 bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, icd->current_fmt->host_fmt); int ret; if (bytes_per_line < 0) return bytes_per_line; buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); dev_dbg(icd->dev.parent, "%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->code != icd->current_fmt->code || vb->width != icd->user_width || vb->height != icd->user_height || vb->field != field) { buf->code = icd->current_fmt->code; vb->width = icd->user_width; vb->height = icd->user_height; vb->field = field; vb->state = VIDEOBUF_NEEDS_INIT; } vb->size = vb->height * bytes_per_line; 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.parent, "%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) { /* * 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); } } 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; vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ? VIDEOBUF_ERROR : 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; int ret; if (pcdev->icd) return -EBUSY; dev_info(icd->dev.parent, "SuperH Mobile CEU driver attached to camera %d\n", icd->devnum); pm_runtime_get_sync(ici->v4l2_dev.dev); ret = sh_mobile_ceu_soft_reset(pcdev); if (!ret) pcdev->icd = icd; return ret; } /* 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); sh_mobile_ceu_soft_reset(pcdev); /* 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); pm_runtime_put_sync(ici->v4l2_dev.dev); dev_info(icd->dev.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, unsigned int out_width, unsigned int out_height) { struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct sh_mobile_ceu_cam *cam = icd->host_priv; struct v4l2_rect *rect = &cam->ceu_rect; 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_dbg(icd->dev.parent, "Crop %ux%u@%u:%u\n", rect->width, rect->height, rect->left, rect->top); left_offset = rect->left; top_offset = rect->top; if (pcdev->image_mode) { in_width = rect->width; if (!pcdev->is_16bit) { in_width *= 2; left_offset *= 2; } width = out_width; cdwdr_width = out_width; } else { int bytes_per_line = soc_mbus_bytes_per_line(out_width, icd->current_fmt->host_fmt); unsigned int w_factor; width = out_width; switch (icd->current_fmt->host_fmt->packing) { case SOC_MBUS_PACKING_2X8_PADHI: w_factor = 2; break; default: w_factor = 1; } in_width = rect->width * w_factor; left_offset = left_offset * w_factor; if (bytes_per_line < 0) cdwdr_width = out_width; else cdwdr_width = bytes_per_line; } height = out_height; in_height = rect->height; if (V4L2_FIELD_NONE != pcdev->field) { height /= 2; in_height /= 2; top_offset /= 2; cdwdr_width *= 2; } /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */ camor = left_offset | (top_offset << 16); dev_geo(icd->dev.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); 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); } 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; /* Make choises, based on platform preferences */ if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW) common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; else common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; } if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW) common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; else common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; } 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->host_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->code) { case V4L2_MBUS_FMT_YUYV8_2X8_BE: value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ break; case V4L2_MBUS_FMT_YVYU8_2X8_BE: value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ break; case V4L2_MBUS_FMT_YUYV8_2X8_LE: value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ break; case V4L2_MBUS_FMT_YVYU8_2X8_LE: 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 & 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); 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, icd->user_width, icd->user_height); mdelay(1); 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.parent, "S_FMT successful for %c%c%c%c %ux%u\n", pixfmt & 0xff, (pixfmt >> 8) & 0xff, (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff, icd->user_width, icd->user_height); 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->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 || buswidth > 16 || (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_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 = 12, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, }, { .fourcc = V4L2_PIX_FMT_NV21, .name = "NV21", .bits_per_sample = 12, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, }, { .fourcc = V4L2_PIX_FMT_NV16, .name = "NV16", .bits_per_sample = 16, .packing = SOC_MBUS_PACKING_NONE, .order = SOC_MBUS_ORDER_LE, }, { .fourcc = V4L2_PIX_FMT_NV61, .name = "NV61", .bits_per_sample = 16, .packing = SOC_MBUS_PACKING_NONE, .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_2X8_PADHI) || (fmt->bits_per_sample > 8 && fmt->packing == SOC_MBUS_PACKING_EXTEND16); } static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx, struct soc_camera_format_xlate *xlate) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->dev.parent; 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_err(icd->dev.parent, "Invalid format code #%d: %d\n", idx, code); return -EINVAL; } ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample); if (ret < 0) return 0; if (!icd->host_priv) { cam = kzalloc(sizeof(*cam), GFP_KERNEL); if (!cam) return -ENOMEM; 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_YUYV8_2X8_BE: case V4L2_MBUS_FMT_YVYU8_2X8_BE: case V4L2_MBUS_FMT_YUYV8_2X8_LE: case V4L2_MBUS_FMT_YVYU8_2X8_LE: 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", xlate->host_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 scale_up(unsigned int size, unsigned int scale) { return (size * scale + 2048) / 4096; } static unsigned int calc_generic_scale(unsigned int input, unsigned int output) { return (input * 4096 + output / 2) / output; } 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 < 0) return ret; *rect = cap.defrect; return ret; } /* * 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 v4l2_subdev *sd, struct v4l2_crop *crop, struct v4l2_crop *cam_crop) { struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c; struct device *dev = sd->v4l2_dev->dev; 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 %ux%u@%u:%u\n", rect->width, rect->height, rect->left, rect->top); return 0; } /* Try to fix cropping, that camera hasn't managed to set */ dev_geo(dev, "Fix camera S_CROP for %ux%u@%u:%u to %ux%u@%u:%u\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; 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); 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. */ 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 %ux%u@%u:%u\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 %ux%u@%u:%u\n", ret, cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top); } return ret; } static int get_camera_scales(struct v4l2_subdev *sd, struct v4l2_rect *rect, unsigned int *scale_h, unsigned int *scale_v) { struct v4l2_mbus_framefmt mf; int ret; ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); if (ret < 0) return ret; *scale_h = calc_generic_scale(rect->width, mf.width); *scale_v = calc_generic_scale(rect->height, mf.height); return 0; } static int get_camera_subwin(struct soc_camera_device *icd, struct v4l2_rect *cam_subrect, unsigned int cam_hscale, unsigned int cam_vscale) { struct sh_mobile_ceu_cam *cam = icd->host_priv; struct v4l2_rect *ceu_rect = &cam->ceu_rect; if (!ceu_rect->width) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->dev.parent; struct v4l2_mbus_framefmt mf; int ret; /* First time */ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); if (ret < 0) return ret; dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height); if (mf.width > 2560) { ceu_rect->width = 2560; ceu_rect->left = (mf.width - 2560) / 2; } else { ceu_rect->width = mf.width; ceu_rect->left = 0; } if (mf.height > 1920) { ceu_rect->height = 1920; ceu_rect->top = (mf.height - 1920) / 2; } else { ceu_rect->height = mf.height; ceu_rect->top = 0; } dev_geo(dev, "initialised CEU rect %ux%u@%u:%u\n", ceu_rect->width, ceu_rect->height, ceu_rect->left, ceu_rect->top); } cam_subrect->width = scale_up(ceu_rect->width, cam_hscale); cam_subrect->left = scale_up(ceu_rect->left, cam_hscale); cam_subrect->height = scale_up(ceu_rect->height, cam_vscale); cam_subrect->top = scale_up(ceu_rect->top, cam_vscale); return 0; } static int client_s_fmt(struct soc_camera_device *icd, struct v4l2_mbus_framefmt *mf, bool ceu_can_scale) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->dev.parent; unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h; unsigned int max_width, max_height; struct v4l2_cropcap cap; int ret; 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, 2560); max_height = min(cap.bounds.height, 1920); ret = v4l2_subdev_call(sd, 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) || !ceu_can_scale) return 0; /* 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_subdev_call(sd, 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; } } return 0; } /** * @rect - camera cropped rectangle * @sub_rect - CEU cropped rectangle, mapped back to camera input area * @ceu_rect - on output calculated CEU crop rectangle */ static int client_scale(struct soc_camera_device *icd, struct v4l2_rect *rect, struct v4l2_rect *sub_rect, struct v4l2_rect *ceu_rect, struct v4l2_mbus_framefmt *mf, bool ceu_can_scale) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct sh_mobile_ceu_cam *cam = icd->host_priv; struct device *dev = icd->dev.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. */ 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 camera scales. */ ret = get_camera_scales(sd, rect, &scale_h, &scale_v); if (ret < 0) return ret; dev_geo(dev, "7: camera scales %u:%u\n", scale_h, scale_v); cam->cam_width = mf_tmp.width; cam->cam_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 * calculated "effective" crop. */ ceu_rect->left = scale_down(sub_rect->left, scale_h); ceu_rect->width = scale_down(sub_rect->width, scale_h); ceu_rect->top = scale_down(sub_rect->top, scale_v); ceu_rect->height = scale_down(sub_rect->height, scale_v); dev_geo(dev, "8: new CEU rect %ux%u@%u:%u\n", ceu_rect->width, ceu_rect->height, ceu_rect->left, ceu_rect->top); return 0; } /* Get combined scales */ static int get_scales(struct soc_camera_device *icd, unsigned int *scale_h, unsigned int *scale_v) { struct sh_mobile_ceu_cam *cam = icd->host_priv; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct v4l2_crop cam_crop; unsigned int width_in, height_in; int ret; cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ret = client_g_rect(sd, &cam_crop.c); if (ret < 0) return ret; ret = get_camera_scales(sd, &cam_crop.c, scale_h, scale_v); if (ret < 0) return ret; width_in = scale_up(cam->ceu_rect.width, *scale_h); height_in = scale_up(cam->ceu_rect.height, *scale_v); *scale_h = calc_generic_scale(width_in, icd->user_width); *scale_v = calc_generic_scale(height_in, icd->user_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_camera_ceu.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 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 sh_mobile_ceu_cam *cam = icd->host_priv; struct v4l2_rect *cam_rect = &cam_crop.c, *ceu_rect = &cam->ceu_rect; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->dev.parent; struct v4l2_mbus_framefmt mf; unsigned int scale_comb_h, scale_comb_v, scale_ceu_h, scale_ceu_v, out_width, out_height; u32 capsr, cflcr; int ret; /* 1. Calculate current combined scales. */ ret = get_scales(icd, &scale_comb_h, &scale_comb_v); if (ret < 0) return ret; dev_geo(dev, "1: combined scales %u:%u\n", scale_comb_h, scale_comb_v); /* 2. Apply iterative camera S_CROP for new input window. */ ret = client_s_crop(sd, a, &cam_crop); if (ret < 0) return ret; dev_geo(dev, "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. If old combined scales applied to new crop produce an impossible * user window, adjust scales to produce nearest possible window. */ out_width = scale_down(rect->width, scale_comb_h); out_height = scale_down(rect->height, scale_comb_v); if (out_width > 2560) out_width = 2560; else if (out_width < 2) out_width = 2; if (out_height > 1920) out_height = 1920; else if (out_height < 4) out_height = 4; dev_geo(dev, "3: Adjusted output %ux%u\n", out_width, out_height); /* 4. Use G_CROP to retrieve actual input window: already in cam_crop */ /* * 5. Using actual input window and calculated combined scales calculate * camera target output window. */ mf.width = scale_down(cam_rect->width, scale_comb_h); mf.height = scale_down(cam_rect->height, scale_comb_v); dev_geo(dev, "5: camera target %ux%u\n", mf.width, mf.height); /* 6. - 9. */ mf.code = cam->code; mf.field = pcdev->field; capsr = capture_save_reset(pcdev); dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr); /* Make relative to camera rectangle */ rect->left -= cam_rect->left; rect->top -= cam_rect->top; ret = client_scale(icd, cam_rect, rect, ceu_rect, &mf, pcdev->image_mode && V4L2_FIELD_NONE == pcdev->field); dev_geo(dev, "6-9: %d\n", ret); /* 10. Use CEU cropping to crop to the new window. */ sh_mobile_ceu_set_rect(icd, out_width, out_height); dev_geo(dev, "10: CEU cropped to %ux%u@%u:%u\n", ceu_rect->width, ceu_rect->height, ceu_rect->left, ceu_rect->top); /* * 11. Calculate CEU scales from camera scales from results of (10) and * user window from (3) */ scale_ceu_h = calc_scale(ceu_rect->width, &out_width); scale_ceu_v = calc_scale(ceu_rect->height, &out_height); dev_geo(dev, "11: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v); /* 12. Apply CEU scales. */ cflcr = scale_ceu_h | (scale_ceu_v << 16); if (cflcr != pcdev->cflcr) { pcdev->cflcr = cflcr; ceu_write(pcdev, CFLCR, cflcr); } /* Restore capture */ if (pcdev->active) capsr |= 1; capture_restore(pcdev, capsr); icd->user_width = out_width; icd->user_height = out_height; /* 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; struct v4l2_mbus_framefmt mf; struct v4l2_subdev *sd = soc_camera_to_subdev(icd); struct device *dev = icd->dev.parent; __u32 pixfmt = pix->pixelformat; const struct soc_camera_format_xlate *xlate; struct v4l2_crop cam_crop; struct v4l2_rect *cam_rect = &cam_crop.c, cam_subrect, ceu_rect; unsigned int scale_cam_h, scale_cam_v; 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. Calculate current camera scales. */ cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ret = client_g_rect(sd, cam_rect); if (ret < 0) return ret; ret = get_camera_scales(sd, cam_rect, &scale_cam_h, &scale_cam_v); if (ret < 0) return ret; dev_geo(dev, "1: camera scales %u:%u\n", scale_cam_h, scale_cam_v); /* * 2. Calculate "effective" input crop (sensor subwindow) - CEU crop * scaled back at current camera scales onto input window. */ ret = get_camera_subwin(icd, &cam_subrect, scale_cam_h, scale_cam_v); if (ret < 0) return ret; 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 "effective" input window to * requested user window. */ 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 camera output window by applying combined scales to real * input window. */ mf.width = scale_down(cam_rect->width, scale_h); mf.height = scale_down(cam_rect->height, scale_v); 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, "4: camera output %ux%u\n", mf.width, mf.height); /* 5. - 9. */ ret = client_scale(icd, cam_rect, &cam_subrect, &ceu_rect, &mf, image_mode && V4L2_FIELD_NONE == field); dev_geo(dev, "5-9: client scale %d\n", ret); /* Done with the camera. Now see if we can improve the result */ dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n", ret, mf.width, mf.height, pix->width, pix->height); if (ret < 0) return ret; if (mf.code != xlate->code) return -EINVAL; /* 10. Use CEU scaling to scale to the requested user window. */ /* We cannot scale up */ if (pix->width > mf.width) pix->width = mf.width; if (pix->width > ceu_rect.width) pix->width = ceu_rect.width; if (pix->height > mf.height) pix->height = mf.height; if (pix->height > ceu_rect.height) pix->height = ceu_rect.height; pix->colorspace = mf.colorspace; if (image_mode) { /* Scale pix->{width x height} down to width x height */ scale_h = calc_scale(ceu_rect.width, &pix->width); scale_v = calc_scale(ceu_rect.height, &pix->height); pcdev->cflcr = scale_h | (scale_v << 16); } else { pix->width = ceu_rect.width; pix->height = ceu_rect.height; scale_h = scale_v = 0; pcdev->cflcr = 0; } dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n", ceu_rect.width, scale_h, pix->width, ceu_rect.height, scale_v, pix->height); cam->code = xlate->code; cam->ceu_rect = ceu_rect; icd->current_fmt = xlate; pcdev->field = field; pcdev->image_mode = image_mode; return 0; } static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, struct v4l2_format *f) { 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; xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); if (!xlate) { dev_warn(icd->dev.parent, "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 = soc_mbus_bytes_per_line(width, xlate->host_fmt); if (pix->bytesperline < 0) return pix->bytesperline; pix->sizeimage = height * pix->bytesperline; /* 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_subdev_call(sd, 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 = 2560; mf.height = 1920; ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); if (ret < 0) { /* Shouldn't actually happen... */ dev_err(icd->dev.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; } 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, icd->dev.parent, &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, pcdev->field, sizeof(struct sh_mobile_ceu_buffer), icd); } static int sh_mobile_ceu_get_parm(struct soc_camera_device *icd, struct v4l2_streamparm *parm) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); return v4l2_subdev_call(sd, video, g_parm, parm); } static int sh_mobile_ceu_set_parm(struct soc_camera_device *icd, struct v4l2_streamparm *parm) { struct v4l2_subdev *sd = soc_camera_to_subdev(icd); return v4l2_subdev_call(sd, video, s_parm, parm); } 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->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->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, .set_parm = sh_mobile_ceu_set_parm, .get_parm = sh_mobile_ceu_get_parm, .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 || (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); 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_clk; return 0; 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); 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); 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) { 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");