| /* |
| * 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/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/videodev2.h> |
| #include <linux/clk.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> |
| |
| /* 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 device *dev; |
| struct soc_camera_host ici; |
| struct soc_camera_device *icd; |
| |
| unsigned int irq; |
| void __iomem *base; |
| struct clk *clk; |
| unsigned long video_limit; |
| |
| /* lock used to protect videobuf */ |
| spinlock_t lock; |
| struct list_head capture; |
| struct videobuf_buffer *active; |
| int is_interlace; |
| |
| struct sh_mobile_ceu_info *pdata; |
| |
| 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->width * icd->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_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_interlace) { |
| phys_addr_bottom = phys_addr_top + icd->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->width * icd->height; |
| ceu_write(pcdev, CDACR, phys_addr_top); |
| if (pcdev->is_interlace) { |
| phys_addr_bottom = phys_addr_top + icd->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->width || |
| vb->height != icd->height || |
| vb->field != field) { |
| buf->fmt = icd->current_fmt; |
| vb->width = icd->width; |
| vb->height = icd->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; |
| } |
| |
| 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; |
| unsigned long flags; |
| |
| dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
| vb, vb->baddr, vb->bsize); |
| |
| vb->state = VIDEOBUF_QUEUED; |
| spin_lock_irqsave(&pcdev->lock, flags); |
| list_add_tail(&vb->queue, &pcdev->capture); |
| |
| if (!pcdev->active) { |
| pcdev->active = vb; |
| sh_mobile_ceu_capture(pcdev); |
| } |
| |
| spin_unlock_irqrestore(&pcdev->lock, flags); |
| } |
| |
| static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb) |
| { |
| 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; |
| 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); |
| 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 = -EBUSY; |
| |
| if (pcdev->icd) |
| goto err; |
| |
| dev_info(&icd->dev, |
| "SuperH Mobile CEU driver attached to camera %d\n", |
| icd->devnum); |
| |
| ret = icd->ops->init(icd); |
| if (ret) |
| goto err; |
| |
| clk_enable(pcdev->clk); |
| |
| ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
| while (ceu_read(pcdev, CSTSR) & 1) |
| msleep(1); |
| |
| pcdev->icd = icd; |
| err: |
| 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); |
| 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); |
| |
| icd->ops->release(icd); |
| |
| dev_info(&icd->dev, |
| "SuperH Mobile CEU driver detached from camera %d\n", |
| icd->devnum); |
| |
| pcdev->icd = NULL; |
| } |
| |
| 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, buswidth, width, height, cfszr_width, cdwdr_width; |
| unsigned long camera_flags, common_flags, value; |
| int yuv_mode, yuv_lineskip; |
| |
| 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: |
| buswidth = 8; |
| break; |
| case SOCAM_DATAWIDTH_16: |
| buswidth = 16; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ceu_write(pcdev, CRCNTR, 0); |
| ceu_write(pcdev, CRCMPR, 0); |
| |
| value = 0x00000010; /* data fetch by default */ |
| yuv_mode = 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: |
| yuv_mode = 1; |
| switch (pcdev->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 |= buswidth == 16 ? 1 << 12 : 0; |
| ceu_write(pcdev, CAMCR, value); |
| |
| ceu_write(pcdev, CAPCR, 0x00300000); |
| ceu_write(pcdev, CAIFR, (pcdev->is_interlace) ? 0x101 : 0); |
| |
| mdelay(1); |
| |
| if (yuv_mode) { |
| width = icd->width * 2; |
| width = buswidth == 16 ? width / 2 : width; |
| cfszr_width = cdwdr_width = icd->width; |
| } else { |
| width = icd->width * ((icd->current_fmt->depth + 7) >> 3); |
| width = buswidth == 16 ? width / 2 : width; |
| cfszr_width = buswidth == 8 ? width / 2 : width; |
| cdwdr_width = buswidth == 16 ? width * 2 : width; |
| } |
| |
| height = icd->height; |
| if (pcdev->is_interlace) { |
| height /= 2; |
| cdwdr_width *= 2; |
| } |
| |
| ceu_write(pcdev, CAMOR, 0); |
| ceu_write(pcdev, CAPWR, (height << 16) | width); |
| ceu_write(pcdev, CFLCR, 0); /* no scaling */ |
| ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width); |
| ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */ |
| |
| /* 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, CDWDR, cdwdr_width); |
| ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ |
| |
| /* 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; |
| |
| ret = sh_mobile_ceu_try_bus_param(icd); |
| if (ret < 0) |
| return 0; |
| |
| /* Beginning of a pass */ |
| if (!idx) |
| icd->host_priv = 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 (icd->host_priv) |
| 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. |
| */ |
| icd->host_priv = (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->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->dev, |
| "Providing format %s in pass-through mode\n", |
| icd->formats[idx].name); |
| } |
| } |
| |
| return formats; |
| } |
| |
| static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd, |
| struct v4l2_rect *rect) |
| { |
| return icd->ops->set_crop(icd, rect); |
| } |
| |
| 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; |
| __u32 pixfmt = f->fmt.pix.pixelformat; |
| const struct soc_camera_format_xlate *xlate; |
| struct v4l2_format cam_f = *f; |
| int ret; |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(&ici->dev, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc; |
| ret = icd->ops->set_fmt(icd, &cam_f); |
| |
| if (!ret) { |
| icd->buswidth = xlate->buswidth; |
| icd->current_fmt = xlate->host_fmt; |
| pcdev->camera_fmt = xlate->cam_fmt; |
| } |
| |
| return ret; |
| } |
| |
| 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); |
| struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| const struct soc_camera_format_xlate *xlate; |
| __u32 pixfmt = f->fmt.pix.pixelformat; |
| int ret; |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(&ici->dev, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| /* FIXME: calculate using depth and bus width */ |
| |
| if (f->fmt.pix.height < 4) |
| f->fmt.pix.height = 4; |
| if (f->fmt.pix.height > 1920) |
| f->fmt.pix.height = 1920; |
| if (f->fmt.pix.width < 2) |
| f->fmt.pix.width = 2; |
| if (f->fmt.pix.width > 2560) |
| f->fmt.pix.width = 2560; |
| f->fmt.pix.width &= ~0x01; |
| f->fmt.pix.height &= ~0x03; |
| |
| f->fmt.pix.bytesperline = f->fmt.pix.width * |
| DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
| f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
| |
| /* limit to sensor capabilities */ |
| ret = icd->ops->try_fmt(icd, f); |
| if (ret < 0) |
| return ret; |
| |
| switch (f->fmt.pix.field) { |
| case V4L2_FIELD_INTERLACED: |
| pcdev->is_interlace = 1; |
| break; |
| case V4L2_FIELD_ANY: |
| f->fmt.pix.field = V4L2_FIELD_NONE; |
| /* fall-through */ |
| case V4L2_FIELD_NONE: |
| pcdev->is_interlace = 0; |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| |
| 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->dev, &pcdev->lock, |
| V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| V4L2_FIELD_ANY, |
| sizeof(struct sh_mobile_ceu_buffer), |
| icd); |
| } |
| |
| 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, |
| .set_crop = sh_mobile_ceu_set_crop, |
| .set_fmt = sh_mobile_ceu_set_fmt, |
| .try_fmt = sh_mobile_ceu_try_fmt, |
| .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, |
| }; |
| |
| static int sh_mobile_ceu_probe(struct platform_device *pdev) |
| { |
| struct sh_mobile_ceu_dev *pcdev; |
| struct resource *res; |
| void __iomem *base; |
| char clk_name[8]; |
| 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; |
| } |
| |
| platform_set_drvdata(pdev, pcdev); |
| 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, res->end - res->start + 1); |
| 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 */ |
| pcdev->dev = &pdev->dev; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| if (res) { |
| err = dma_declare_coherent_memory(&pdev->dev, res->start, |
| res->start, |
| (res->end - res->start) + 1, |
| 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 = (res->end - res->start) + 1; |
| } |
| |
| /* 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; |
| } |
| |
| snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id); |
| pcdev->clk = clk_get(&pdev->dev, clk_name); |
| if (IS_ERR(pcdev->clk)) { |
| dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); |
| err = PTR_ERR(pcdev->clk); |
| goto exit_free_irq; |
| } |
| |
| pcdev->ici.priv = pcdev; |
| pcdev->ici.dev.parent = &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: |
| clk_put(pcdev->clk); |
| 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 sh_mobile_ceu_remove(struct platform_device *pdev) |
| { |
| struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev); |
| |
| soc_camera_host_unregister(&pcdev->ici); |
| clk_put(pcdev->clk); |
| 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 struct platform_driver sh_mobile_ceu_driver = { |
| .driver = { |
| .name = "sh_mobile_ceu", |
| }, |
| .probe = sh_mobile_ceu_probe, |
| .remove = 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"); |