From: Hans Verkuil Date: Tue, 23 Feb 2016 16:39:10 +0000 (-0300) Subject: [media] soc_camera/mx3_camera.c: move to staging in preparation, for removal X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5ed08a8649ddb95860fcf6d8d2e0f34b338043a5;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [media] soc_camera/mx3_camera.c: move to staging in preparation, for removal This driver is deprecated: it should become a stand-alone driver instead of using the soc-camera framework. Unless someone is willing to take this on (unlikely with such ancient hardware) it is going to be removed from the kernel soon. Signed-off-by: Hans Verkuil Acked-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig index 0a537aba35e2..355298989dd8 100644 --- a/drivers/media/platform/soc_camera/Kconfig +++ b/drivers/media/platform/soc_camera/Kconfig @@ -17,15 +17,6 @@ config SOC_CAMERA_PLATFORM help This is a generic SoC camera platform driver, useful for testing -config VIDEO_MX3 - tristate "i.MX3x Camera Sensor Interface driver" - depends on VIDEO_DEV && MX3_IPU && SOC_CAMERA - depends on MX3_IPU || COMPILE_TEST - depends on HAS_DMA - select VIDEOBUF2_DMA_CONTIG - ---help--- - This is a v4l2 driver for the i.MX3x Camera Sensor Interface - config VIDEO_PXA27x tristate "PXA27x Quick Capture Interface driver" depends on VIDEO_DEV && PXA27x && SOC_CAMERA diff --git a/drivers/media/platform/soc_camera/Makefile b/drivers/media/platform/soc_camera/Makefile index dad56b9fa01e..7ee71ae231c7 100644 --- a/drivers/media/platform/soc_camera/Makefile +++ b/drivers/media/platform/soc_camera/Makefile @@ -7,7 +7,6 @@ obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o # soc-camera host drivers have to be linked after camera drivers obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o -obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o obj-$(CONFIG_VIDEO_SH_MOBILE_CSI2) += sh_mobile_csi2.o diff --git a/drivers/media/platform/soc_camera/mx3_camera.c b/drivers/media/platform/soc_camera/mx3_camera.c deleted file mode 100644 index aa39e9569b1a..000000000000 --- a/drivers/media/platform/soc_camera/mx3_camera.c +++ /dev/null @@ -1,1264 +0,0 @@ -/* - * V4L2 Driver for i.MX3x camera host - * - * Copyright (C) 2008 - * Guennadi Liakhovetski, DENX Software Engineering, - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include - -#include -#include - -#define MX3_CAM_DRV_NAME "mx3-camera" - -/* CMOS Sensor Interface Registers */ -#define CSI_REG_START 0x60 - -#define CSI_SENS_CONF (0x60 - CSI_REG_START) -#define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START) -#define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START) -#define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START) -#define CSI_TST_CTRL (0x70 - CSI_REG_START) -#define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START) -#define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START) -#define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START) -#define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START) -#define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START) - -#define CSI_SENS_CONF_VSYNC_POL_SHIFT 0 -#define CSI_SENS_CONF_HSYNC_POL_SHIFT 1 -#define CSI_SENS_CONF_DATA_POL_SHIFT 2 -#define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3 -#define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4 -#define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7 -#define CSI_SENS_CONF_DATA_FMT_SHIFT 8 -#define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10 -#define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15 -#define CSI_SENS_CONF_DIVRATIO_SHIFT 16 - -#define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT) -#define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT) -#define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT) - -#define MAX_VIDEO_MEM 16 - -struct mx3_camera_buffer { - /* common v4l buffer stuff -- must be first */ - struct vb2_v4l2_buffer vb; - struct list_head queue; - - /* One descriptot per scatterlist (per frame) */ - struct dma_async_tx_descriptor *txd; - - /* We have to "build" a scatterlist ourselves - one element per frame */ - struct scatterlist sg; -}; - -/** - * struct mx3_camera_dev - i.MX3x camera (CSI) object - * @dev: camera device, to which the coherent buffer is attached - * @icd: currently attached camera sensor - * @clk: pointer to clock - * @base: remapped register base address - * @pdata: platform data - * @platform_flags: platform flags - * @mclk: master clock frequency in Hz - * @capture: list of capture videobuffers - * @lock: protects video buffer lists - * @active: active video buffer - * @idmac_channel: array of pointers to IPU DMAC DMA channels - * @soc_host: embedded soc_host object - */ -struct mx3_camera_dev { - /* - * i.MX3x is only supposed to handle one camera on its Camera Sensor - * Interface. If anyone ever builds hardware to enable more than one - * camera _simultaneously_, they will have to modify this driver too - */ - struct clk *clk; - - void __iomem *base; - - struct mx3_camera_pdata *pdata; - - unsigned long platform_flags; - unsigned long mclk; - u16 width_flags; /* max 15 bits */ - - struct list_head capture; - spinlock_t lock; /* Protects video buffer lists */ - struct mx3_camera_buffer *active; - size_t buf_total; - struct vb2_alloc_ctx *alloc_ctx; - enum v4l2_field field; - int sequence; - - /* IDMAC / dmaengine interface */ - struct idmac_channel *idmac_channel[1]; /* We need one channel */ - - struct soc_camera_host soc_host; -}; - -struct dma_chan_request { - struct mx3_camera_dev *mx3_cam; - enum ipu_channel id; -}; - -static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg) -{ - return __raw_readl(mx3->base + reg); -} - -static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg) -{ - __raw_writel(value, mx3->base + reg); -} - -static struct mx3_camera_buffer *to_mx3_vb(struct vb2_v4l2_buffer *vb) -{ - return container_of(vb, struct mx3_camera_buffer, vb); -} - -/* Called from the IPU IDMAC ISR */ -static void mx3_cam_dma_done(void *arg) -{ - struct idmac_tx_desc *desc = to_tx_desc(arg); - struct dma_chan *chan = desc->txd.chan; - struct idmac_channel *ichannel = to_idmac_chan(chan); - struct mx3_camera_dev *mx3_cam = ichannel->client; - - dev_dbg(chan->device->dev, "callback cookie %d, active DMA %pad\n", - desc->txd.cookie, mx3_cam->active ? &sg_dma_address(&mx3_cam->active->sg) : NULL); - - spin_lock(&mx3_cam->lock); - if (mx3_cam->active) { - struct vb2_v4l2_buffer *vb = &mx3_cam->active->vb; - struct mx3_camera_buffer *buf = to_mx3_vb(vb); - - list_del_init(&buf->queue); - vb->vb2_buf.timestamp = ktime_get_ns(); - vb->field = mx3_cam->field; - vb->sequence = mx3_cam->sequence++; - vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE); - } - - if (list_empty(&mx3_cam->capture)) { - mx3_cam->active = NULL; - spin_unlock(&mx3_cam->lock); - - /* - * stop capture - without further buffers IPU_CHA_BUF0_RDY will - * not get updated - */ - return; - } - - mx3_cam->active = list_entry(mx3_cam->capture.next, - struct mx3_camera_buffer, queue); - spin_unlock(&mx3_cam->lock); -} - -/* - * Videobuf operations - */ - -/* - * Calculate the __buffer__ (not data) size and number of buffers. - */ -static int mx3_videobuf_setup(struct vb2_queue *vq, - unsigned int *count, unsigned int *num_planes, - unsigned int sizes[], void *alloc_ctxs[]) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(vq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - - if (!mx3_cam->idmac_channel[0]) - return -EINVAL; - - alloc_ctxs[0] = mx3_cam->alloc_ctx; - - if (!vq->num_buffers) - mx3_cam->sequence = 0; - - if (!*count) - *count = 2; - - /* Called from VIDIOC_REQBUFS or in compatibility mode */ - if (!*num_planes) - sizes[0] = icd->sizeimage; - else if (sizes[0] < icd->sizeimage) - return -EINVAL; - - /* If *num_planes != 0, we have already verified *count. */ - if (sizes[0] * *count + mx3_cam->buf_total > MAX_VIDEO_MEM * 1024 * 1024) - *count = (MAX_VIDEO_MEM * 1024 * 1024 - mx3_cam->buf_total) / - sizes[0]; - - *num_planes = 1; - - return 0; -} - -static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc) -{ - /* Add more formats as need arises and test possibilities appear... */ - switch (fourcc) { - case V4L2_PIX_FMT_RGB24: - return IPU_PIX_FMT_RGB24; - case V4L2_PIX_FMT_UYVY: - case V4L2_PIX_FMT_RGB565: - default: - return IPU_PIX_FMT_GENERIC; - } -} - -static void mx3_videobuf_queue(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); - struct scatterlist *sg = &buf->sg; - struct dma_async_tx_descriptor *txd; - struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; - struct idmac_video_param *video = &ichan->params.video; - const struct soc_mbus_pixelfmt *host_fmt = icd->current_fmt->host_fmt; - dma_cookie_t cookie; - size_t new_size; - - new_size = icd->sizeimage; - - if (vb2_plane_size(vb, 0) < new_size) { - dev_err(icd->parent, "Buffer #%d too small (%lu < %zu)\n", - vbuf->vb2_buf.index, vb2_plane_size(vb, 0), new_size); - goto error; - } - - if (!buf->txd) { - sg_dma_address(sg) = vb2_dma_contig_plane_dma_addr(vb, 0); - sg_dma_len(sg) = new_size; - - txd = dmaengine_prep_slave_sg( - &ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT); - if (!txd) - goto error; - - txd->callback_param = txd; - txd->callback = mx3_cam_dma_done; - - buf->txd = txd; - } else { - txd = buf->txd; - } - - vb2_set_plane_payload(vb, 0, new_size); - - /* This is the configuration of one sg-element */ - video->out_pixel_fmt = fourcc_to_ipu_pix(host_fmt->fourcc); - - if (video->out_pixel_fmt == IPU_PIX_FMT_GENERIC) { - /* - * If the IPU DMA channel is configured to transfer generic - * 8-bit data, we have to set up the geometry parameters - * correctly, according to the current pixel format. The DMA - * horizontal parameters in this case are expressed in bytes, - * not in pixels. - */ - video->out_width = icd->bytesperline; - video->out_height = icd->user_height; - video->out_stride = icd->bytesperline; - } else { - /* - * For IPU known formats the pixel unit will be managed - * successfully by the IPU code - */ - video->out_width = icd->user_width; - video->out_height = icd->user_height; - video->out_stride = icd->user_width; - } - -#ifdef DEBUG - /* helps to see what DMA actually has written */ - if (vb2_plane_vaddr(vb, 0)) - memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0)); -#endif - - spin_lock_irq(&mx3_cam->lock); - list_add_tail(&buf->queue, &mx3_cam->capture); - - if (!mx3_cam->active) - mx3_cam->active = buf; - - spin_unlock_irq(&mx3_cam->lock); - - cookie = txd->tx_submit(txd); - dev_dbg(icd->parent, "Submitted cookie %d DMA %pad\n", - cookie, &sg_dma_address(&buf->sg)); - - if (cookie >= 0) - return; - - spin_lock_irq(&mx3_cam->lock); - - /* Submit error */ - list_del_init(&buf->queue); - - if (mx3_cam->active == buf) - mx3_cam->active = NULL; - - spin_unlock_irq(&mx3_cam->lock); -error: - vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); -} - -static void mx3_videobuf_release(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); - struct dma_async_tx_descriptor *txd = buf->txd; - unsigned long flags; - - dev_dbg(icd->parent, - "Release%s DMA %pad, queue %sempty\n", - mx3_cam->active == buf ? " active" : "", &sg_dma_address(&buf->sg), - list_empty(&buf->queue) ? "" : "not "); - - spin_lock_irqsave(&mx3_cam->lock, flags); - - if (mx3_cam->active == buf) - mx3_cam->active = NULL; - - /* Doesn't hurt also if the list is empty */ - list_del_init(&buf->queue); - - if (txd) { - buf->txd = NULL; - if (mx3_cam->idmac_channel[0]) - async_tx_ack(txd); - } - - spin_unlock_irqrestore(&mx3_cam->lock, flags); - - mx3_cam->buf_total -= vb2_plane_size(vb, 0); -} - -static int mx3_videobuf_init(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); - - if (!buf->txd) { - /* This is for locking debugging only */ - INIT_LIST_HEAD(&buf->queue); - sg_init_table(&buf->sg, 1); - - mx3_cam->buf_total += vb2_plane_size(vb, 0); - } - - return 0; -} - -static void mx3_stop_streaming(struct vb2_queue *q) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(q); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; - struct mx3_camera_buffer *buf, *tmp; - unsigned long flags; - - if (ichan) - dmaengine_pause(&ichan->dma_chan); - - spin_lock_irqsave(&mx3_cam->lock, flags); - - mx3_cam->active = NULL; - - list_for_each_entry_safe(buf, tmp, &mx3_cam->capture, queue) { - list_del_init(&buf->queue); - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); - } - - spin_unlock_irqrestore(&mx3_cam->lock, flags); -} - -static struct vb2_ops mx3_videobuf_ops = { - .queue_setup = mx3_videobuf_setup, - .buf_queue = mx3_videobuf_queue, - .buf_cleanup = mx3_videobuf_release, - .buf_init = mx3_videobuf_init, - .wait_prepare = vb2_ops_wait_prepare, - .wait_finish = vb2_ops_wait_finish, - .stop_streaming = mx3_stop_streaming, -}; - -static int mx3_camera_init_videobuf(struct vb2_queue *q, - struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - - q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - q->io_modes = VB2_MMAP | VB2_USERPTR; - q->drv_priv = icd; - q->ops = &mx3_videobuf_ops; - q->mem_ops = &vb2_dma_contig_memops; - q->buf_struct_size = sizeof(struct mx3_camera_buffer); - q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - q->lock = &ici->host_lock; - - return vb2_queue_init(q); -} - -/* First part of ipu_csi_init_interface() */ -static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam) -{ - u32 conf; - long rate; - - /* Set default size: ipu_csi_set_window_size() */ - csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE); - /* ...and position to 0:0: ipu_csi_set_window_pos() */ - conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; - csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL); - - /* We use only gated clock synchronisation mode so far */ - conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT; - - /* Set generic data, platform-biggest bus-width */ - conf |= CSI_SENS_CONF_DATA_FMT_BAYER; - - if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) - conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) - conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) - conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/ - conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - - if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC) - conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT; - if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC) - conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT; - if (mx3_cam->platform_flags & MX3_CAMERA_DP) - conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; - if (mx3_cam->platform_flags & MX3_CAMERA_PCP) - conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; - if (mx3_cam->platform_flags & MX3_CAMERA_HSP) - conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; - if (mx3_cam->platform_flags & MX3_CAMERA_VSP) - conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; - - /* ipu_csi_init_interface() */ - csi_reg_write(mx3_cam, conf, CSI_SENS_CONF); - - clk_prepare_enable(mx3_cam->clk); - rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk); - dev_dbg(mx3_cam->soc_host.v4l2_dev.dev, "Set SENS_CONF to %x, rate %ld\n", conf, rate); - if (rate) - clk_set_rate(mx3_cam->clk, rate); -} - -static int mx3_camera_add_device(struct soc_camera_device *icd) -{ - dev_info(icd->parent, "MX3 Camera driver attached to camera %d\n", - icd->devnum); - - return 0; -} - -static void mx3_camera_remove_device(struct soc_camera_device *icd) -{ - dev_info(icd->parent, "MX3 Camera driver detached from camera %d\n", - icd->devnum); -} - -/* Called with .host_lock held */ -static int mx3_camera_clock_start(struct soc_camera_host *ici) -{ - struct mx3_camera_dev *mx3_cam = ici->priv; - - mx3_camera_activate(mx3_cam); - - mx3_cam->buf_total = 0; - - return 0; -} - -/* Called with .host_lock held */ -static void mx3_camera_clock_stop(struct soc_camera_host *ici) -{ - struct mx3_camera_dev *mx3_cam = ici->priv; - struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; - - if (*ichan) { - dma_release_channel(&(*ichan)->dma_chan); - *ichan = NULL; - } - - clk_disable_unprepare(mx3_cam->clk); -} - -static int test_platform_param(struct mx3_camera_dev *mx3_cam, - unsigned char buswidth, unsigned long *flags) -{ - /* - * If requested data width is supported by the platform, use it or any - * possible lower value - i.MX31 is smart enough to shift bits - */ - if (buswidth > fls(mx3_cam->width_flags)) - return -EINVAL; - - /* - * Platform specified synchronization and pixel clock polarities are - * only a recommendation and are only used during probing. MX3x - * camera interface only works in master mode, i.e., uses HSYNC and - * VSYNC signals from the sensor - */ - *flags = V4L2_MBUS_MASTER | - V4L2_MBUS_HSYNC_ACTIVE_HIGH | - V4L2_MBUS_HSYNC_ACTIVE_LOW | - V4L2_MBUS_VSYNC_ACTIVE_HIGH | - V4L2_MBUS_VSYNC_ACTIVE_LOW | - V4L2_MBUS_PCLK_SAMPLE_RISING | - V4L2_MBUS_PCLK_SAMPLE_FALLING | - V4L2_MBUS_DATA_ACTIVE_HIGH | - V4L2_MBUS_DATA_ACTIVE_LOW; - - return 0; -} - -static int mx3_camera_try_bus_param(struct soc_camera_device *icd, - const unsigned int depth) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; - unsigned long bus_flags, common_flags; - int ret = test_platform_param(mx3_cam, depth, &bus_flags); - - dev_dbg(icd->parent, "request bus width %d bit: %d\n", depth, ret); - - if (ret < 0) - return ret; - - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); - if (!ret) { - common_flags = soc_mbus_config_compatible(&cfg, - bus_flags); - if (!common_flags) { - dev_warn(icd->parent, - "Flags incompatible: camera 0x%x, host 0x%lx\n", - cfg.flags, bus_flags); - return -EINVAL; - } - } else if (ret != -ENOIOCTLCMD) { - return ret; - } - - return 0; -} - -static bool chan_filter(struct dma_chan *chan, void *arg) -{ - struct dma_chan_request *rq = arg; - struct mx3_camera_pdata *pdata; - - if (!imx_dma_is_ipu(chan)) - return false; - - if (!rq) - return false; - - pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data; - - return rq->id == chan->chan_id && - pdata->dma_dev == chan->device->dev; -} - -static const struct soc_mbus_pixelfmt mx3_camera_formats[] = { - { - .fourcc = V4L2_PIX_FMT_SBGGR8, - .name = "Bayer BGGR (sRGB) 8 bit", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_NONE, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PACKED, - }, { - .fourcc = V4L2_PIX_FMT_GREY, - .name = "Monochrome 8 bit", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_NONE, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PACKED, - }, -}; - -/* This will be corrected as we get more formats */ -static bool mx3_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt) -{ - return fmt->packing == SOC_MBUS_PACKING_NONE || - (fmt->bits_per_sample == 8 && - fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || - (fmt->bits_per_sample > 8 && - fmt->packing == SOC_MBUS_PACKING_EXTEND16); -} - -static int mx3_camera_get_formats(struct soc_camera_device *icd, unsigned int idx, - struct soc_camera_format_xlate *xlate) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct device *dev = icd->parent; - int formats = 0, ret; - struct v4l2_subdev_mbus_code_enum code = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - .index = idx, - }; - const struct soc_mbus_pixelfmt *fmt; - - ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code); - if (ret < 0) - /* No more formats */ - return 0; - - fmt = soc_mbus_get_fmtdesc(code.code); - if (!fmt) { - dev_warn(icd->parent, - "Unsupported format code #%u: 0x%x\n", idx, code.code); - return 0; - } - - /* This also checks support for the requested bits-per-sample */ - ret = mx3_camera_try_bus_param(icd, fmt->bits_per_sample); - if (ret < 0) - return 0; - - switch (code.code) { - case MEDIA_BUS_FMT_SBGGR10_1X10: - formats++; - if (xlate) { - xlate->host_fmt = &mx3_camera_formats[0]; - xlate->code = code.code; - xlate++; - dev_dbg(dev, "Providing format %s using code 0x%x\n", - mx3_camera_formats[0].name, code.code); - } - break; - case MEDIA_BUS_FMT_Y10_1X10: - formats++; - if (xlate) { - xlate->host_fmt = &mx3_camera_formats[1]; - xlate->code = code.code; - xlate++; - dev_dbg(dev, "Providing format %s using code 0x%x\n", - mx3_camera_formats[1].name, code.code); - } - break; - default: - if (!mx3_camera_packing_supported(fmt)) - return 0; - } - - /* Generic pass-through */ - formats++; - if (xlate) { - xlate->host_fmt = fmt; - xlate->code = code.code; - dev_dbg(dev, "Providing format %c%c%c%c in pass-through mode\n", - (fmt->fourcc >> (0*8)) & 0xFF, - (fmt->fourcc >> (1*8)) & 0xFF, - (fmt->fourcc >> (2*8)) & 0xFF, - (fmt->fourcc >> (3*8)) & 0xFF); - xlate++; - } - - return formats; -} - -static void configure_geometry(struct mx3_camera_dev *mx3_cam, - unsigned int width, unsigned int height, - const struct soc_mbus_pixelfmt *fmt) -{ - u32 ctrl, width_field, height_field; - - if (fourcc_to_ipu_pix(fmt->fourcc) == IPU_PIX_FMT_GENERIC) { - /* - * As the CSI will be configured to output BAYER, here - * the width parameter count the number of samples to - * capture to complete the whole image width. - */ - unsigned int num, den; - int ret = soc_mbus_samples_per_pixel(fmt, &num, &den); - BUG_ON(ret < 0); - width = width * num / den; - } - - /* Setup frame size - this cannot be changed on-the-fly... */ - width_field = width - 1; - height_field = height - 1; - csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE); - - csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1); - csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2); - - csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE); - - /* ...and position */ - ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; - /* Sensor does the cropping */ - csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL); -} - -static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam) -{ - dma_cap_mask_t mask; - struct dma_chan *chan; - struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; - /* We have to use IDMAC_IC_7 for Bayer / generic data */ - struct dma_chan_request rq = {.mx3_cam = mx3_cam, - .id = IDMAC_IC_7}; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - dma_cap_set(DMA_PRIVATE, mask); - chan = dma_request_channel(mask, chan_filter, &rq); - if (!chan) - return -EBUSY; - - *ichan = to_idmac_chan(chan); - (*ichan)->client = mx3_cam; - - return 0; -} - -/* - * FIXME: learn to use stride != width, then we can keep stride properly aligned - * and support arbitrary (even) widths. - */ -static inline void stride_align(__u32 *width) -{ - if (ALIGN(*width, 8) < 4096) - *width = ALIGN(*width, 8); - else - *width = *width & ~7; -} - -/* - * As long as we don't implement host-side cropping and scaling, we can use - * default g_crop and cropcap from soc_camera.c - */ -static int mx3_camera_set_crop(struct soc_camera_device *icd, - const struct v4l2_crop *a) -{ - struct v4l2_crop a_writable = *a; - struct v4l2_rect *rect = &a_writable.c; - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct v4l2_subdev_format fmt = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - struct v4l2_mbus_framefmt *mf = &fmt.format; - int ret; - - soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096); - soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096); - - ret = v4l2_subdev_call(sd, video, s_crop, a); - if (ret < 0) - return ret; - - /* The capture device might have changed its output sizes */ - ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt); - if (ret < 0) - return ret; - - if (mf->code != icd->current_fmt->code) - return -EINVAL; - - if (mf->width & 7) { - /* Ouch! We can only handle 8-byte aligned width... */ - stride_align(&mf->width); - ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &fmt); - if (ret < 0) - return ret; - } - - if (mf->width != icd->user_width || mf->height != icd->user_height) - configure_geometry(mx3_cam, mf->width, mf->height, - icd->current_fmt->host_fmt); - - dev_dbg(icd->parent, "Sensor cropped %dx%d\n", - mf->width, mf->height); - - icd->user_width = mf->width; - icd->user_height = mf->height; - - return ret; -} - -static int mx3_camera_set_fmt(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - const struct soc_camera_format_xlate *xlate; - struct v4l2_pix_format *pix = &f->fmt.pix; - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - struct v4l2_mbus_framefmt *mf = &format.format; - int ret; - - xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); - if (!xlate) { - dev_warn(icd->parent, "Format %x not found\n", - pix->pixelformat); - return -EINVAL; - } - - stride_align(&pix->width); - dev_dbg(icd->parent, "Set format %dx%d\n", pix->width, pix->height); - - /* - * Might have to perform a complete interface initialisation like in - * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider - * mxc_v4l2_s_fmt() - */ - - configure_geometry(mx3_cam, pix->width, pix->height, xlate->host_fmt); - - mf->width = pix->width; - mf->height = pix->height; - mf->field = pix->field; - mf->colorspace = pix->colorspace; - mf->code = xlate->code; - - ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format); - if (ret < 0) - return ret; - - if (mf->code != xlate->code) - return -EINVAL; - - if (!mx3_cam->idmac_channel[0]) { - ret = acquire_dma_channel(mx3_cam); - if (ret < 0) - return ret; - } - - pix->width = mf->width; - pix->height = mf->height; - pix->field = mf->field; - mx3_cam->field = mf->field; - pix->colorspace = mf->colorspace; - icd->current_fmt = xlate; - - dev_dbg(icd->parent, "Sensor set %dx%d\n", pix->width, pix->height); - - return ret; -} - -static int mx3_camera_try_fmt(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - const struct soc_camera_format_xlate *xlate; - struct v4l2_pix_format *pix = &f->fmt.pix; - struct v4l2_subdev_pad_config pad_cfg; - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_TRY, - }; - struct v4l2_mbus_framefmt *mf = &format.format; - __u32 pixfmt = pix->pixelformat; - int ret; - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (pixfmt && !xlate) { - dev_warn(icd->parent, "Format %x not found\n", pixfmt); - return -EINVAL; - } - - /* limit to MX3 hardware capabilities */ - if (pix->height > 4096) - pix->height = 4096; - if (pix->width > 4096) - pix->width = 4096; - - /* limit to sensor capabilities */ - mf->width = pix->width; - mf->height = pix->height; - mf->field = pix->field; - mf->colorspace = pix->colorspace; - mf->code = xlate->code; - - ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format); - if (ret < 0) - return ret; - - pix->width = mf->width; - pix->height = mf->height; - pix->colorspace = mf->colorspace; - - switch (mf->field) { - case V4L2_FIELD_ANY: - pix->field = V4L2_FIELD_NONE; - break; - case V4L2_FIELD_NONE: - break; - default: - dev_err(icd->parent, "Field type %d unsupported.\n", - mf->field); - ret = -EINVAL; - } - - return ret; -} - -static int mx3_camera_reqbufs(struct soc_camera_device *icd, - struct v4l2_requestbuffers *p) -{ - return 0; -} - -static unsigned int mx3_camera_poll(struct file *file, poll_table *pt) -{ - struct soc_camera_device *icd = file->private_data; - - return vb2_poll(&icd->vb2_vidq, file, pt); -} - -static int mx3_camera_querycap(struct soc_camera_host *ici, - struct v4l2_capability *cap) -{ - /* cap->name is set by the firendly caller:-> */ - strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card)); - cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; - cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; - - return 0; -} - -static int mx3_camera_set_bus_param(struct soc_camera_device *icd) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx3_camera_dev *mx3_cam = ici->priv; - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; - u32 pixfmt = icd->current_fmt->host_fmt->fourcc; - unsigned long bus_flags, common_flags; - u32 dw, sens_conf; - const struct soc_mbus_pixelfmt *fmt; - int buswidth; - int ret; - const struct soc_camera_format_xlate *xlate; - struct device *dev = icd->parent; - - fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code); - if (!fmt) - return -EINVAL; - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (!xlate) { - dev_warn(dev, "Format %x not found\n", pixfmt); - return -EINVAL; - } - - buswidth = fmt->bits_per_sample; - ret = test_platform_param(mx3_cam, buswidth, &bus_flags); - - dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret); - - if (ret < 0) - return ret; - - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); - if (!ret) { - common_flags = soc_mbus_config_compatible(&cfg, - bus_flags); - if (!common_flags) { - dev_warn(icd->parent, - "Flags incompatible: camera 0x%x, host 0x%lx\n", - cfg.flags, bus_flags); - return -EINVAL; - } - } else if (ret != -ENOIOCTLCMD) { - return ret; - } else { - common_flags = bus_flags; - } - - dev_dbg(dev, "Flags cam: 0x%x host: 0x%lx common: 0x%lx\n", - cfg.flags, bus_flags, common_flags); - - /* Make choices, based on platform preferences */ - if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { - if (mx3_cam->platform_flags & MX3_CAMERA_HSP) - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH; - else - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW; - } - - if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) { - if (mx3_cam->platform_flags & MX3_CAMERA_VSP) - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH; - else - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW; - } - - if ((common_flags & V4L2_MBUS_DATA_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)) { - if (mx3_cam->platform_flags & MX3_CAMERA_DP) - common_flags &= ~V4L2_MBUS_DATA_ACTIVE_HIGH; - else - common_flags &= ~V4L2_MBUS_DATA_ACTIVE_LOW; - } - - if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) && - (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) { - if (mx3_cam->platform_flags & MX3_CAMERA_PCP) - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING; - else - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING; - } - - cfg.flags = common_flags; - ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); - if (ret < 0 && ret != -ENOIOCTLCMD) { - dev_dbg(dev, "camera s_mbus_config(0x%lx) returned %d\n", - common_flags, ret); - return ret; - } - - /* - * So far only gated clock mode is supported. Add a line - * (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) | - * below and select the required mode when supporting other - * synchronisation protocols. - */ - sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) & - ~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) | - (1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) | - (1 << CSI_SENS_CONF_DATA_POL_SHIFT) | - (1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) | - (3 << CSI_SENS_CONF_DATA_FMT_SHIFT) | - (3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT)); - - /* TODO: Support RGB and YUV formats */ - - /* This has been set in mx3_camera_activate(), but we clear it above */ - sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER; - - if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) - sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; - if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) - sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; - if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) - sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; - if (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW) - sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; - - /* Just do what we're asked to do */ - switch (xlate->host_fmt->bits_per_sample) { - case 4: - dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - break; - case 8: - dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - break; - case 10: - dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - break; - default: - /* - * Actually it can only be 15 now, default is just to silence - * compiler warnings - */ - case 15: - dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; - } - - csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF); - - dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw); - - return 0; -} - -static struct soc_camera_host_ops mx3_soc_camera_host_ops = { - .owner = THIS_MODULE, - .add = mx3_camera_add_device, - .remove = mx3_camera_remove_device, - .clock_start = mx3_camera_clock_start, - .clock_stop = mx3_camera_clock_stop, - .set_crop = mx3_camera_set_crop, - .set_fmt = mx3_camera_set_fmt, - .try_fmt = mx3_camera_try_fmt, - .get_formats = mx3_camera_get_formats, - .init_videobuf2 = mx3_camera_init_videobuf, - .reqbufs = mx3_camera_reqbufs, - .poll = mx3_camera_poll, - .querycap = mx3_camera_querycap, - .set_bus_param = mx3_camera_set_bus_param, -}; - -static int mx3_camera_probe(struct platform_device *pdev) -{ - struct mx3_camera_pdata *pdata = pdev->dev.platform_data; - struct mx3_camera_dev *mx3_cam; - struct resource *res; - void __iomem *base; - int err = 0; - struct soc_camera_host *soc_host; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(base)) - return PTR_ERR(base); - - if (!pdata) - return -EINVAL; - - mx3_cam = devm_kzalloc(&pdev->dev, sizeof(*mx3_cam), GFP_KERNEL); - if (!mx3_cam) { - dev_err(&pdev->dev, "Could not allocate mx3 camera object\n"); - return -ENOMEM; - } - - mx3_cam->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(mx3_cam->clk)) - return PTR_ERR(mx3_cam->clk); - - mx3_cam->pdata = pdata; - mx3_cam->platform_flags = pdata->flags; - if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_MASK)) { - /* - * Platform hasn't set available data widths. This is bad. - * Warn and use a default. - */ - dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " - "data widths, using default 8 bit\n"); - mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8; - } - if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4) - mx3_cam->width_flags = 1 << 3; - if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) - mx3_cam->width_flags |= 1 << 7; - if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) - mx3_cam->width_flags |= 1 << 9; - if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) - mx3_cam->width_flags |= 1 << 14; - - mx3_cam->mclk = pdata->mclk_10khz * 10000; - if (!mx3_cam->mclk) { - dev_warn(&pdev->dev, - "mclk_10khz == 0! Please, fix your platform data. " - "Using default 20MHz\n"); - mx3_cam->mclk = 20000000; - } - - /* list of video-buffers */ - INIT_LIST_HEAD(&mx3_cam->capture); - spin_lock_init(&mx3_cam->lock); - - mx3_cam->base = base; - - soc_host = &mx3_cam->soc_host; - soc_host->drv_name = MX3_CAM_DRV_NAME; - soc_host->ops = &mx3_soc_camera_host_ops; - soc_host->priv = mx3_cam; - soc_host->v4l2_dev.dev = &pdev->dev; - soc_host->nr = pdev->id; - - mx3_cam->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); - if (IS_ERR(mx3_cam->alloc_ctx)) - return PTR_ERR(mx3_cam->alloc_ctx); - - if (pdata->asd_sizes) { - soc_host->asd = pdata->asd; - soc_host->asd_sizes = pdata->asd_sizes; - } - - err = soc_camera_host_register(soc_host); - if (err) - goto ecamhostreg; - - /* IDMAC interface */ - dmaengine_get(); - - return 0; - -ecamhostreg: - vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); - return err; -} - -static int mx3_camera_remove(struct platform_device *pdev) -{ - struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); - struct mx3_camera_dev *mx3_cam = container_of(soc_host, - struct mx3_camera_dev, soc_host); - - soc_camera_host_unregister(soc_host); - - /* - * The channel has either not been allocated, - * or should have been released - */ - if (WARN_ON(mx3_cam->idmac_channel[0])) - dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan); - - vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); - - dmaengine_put(); - - return 0; -} - -static struct platform_driver mx3_camera_driver = { - .driver = { - .name = MX3_CAM_DRV_NAME, - }, - .probe = mx3_camera_probe, - .remove = mx3_camera_remove, -}; - -module_platform_driver(mx3_camera_driver); - -MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver"); -MODULE_AUTHOR("Guennadi Liakhovetski "); -MODULE_LICENSE("GPL v2"); -MODULE_VERSION("0.2.3"); -MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME); diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig index 11d62b2afae5..be271084ad91 100644 --- a/drivers/staging/media/Kconfig +++ b/drivers/staging/media/Kconfig @@ -31,6 +31,8 @@ source "drivers/staging/media/mn88473/Kconfig" source "drivers/staging/media/mx2/Kconfig" +source "drivers/staging/media/mx3/Kconfig" + source "drivers/staging/media/omap1/Kconfig" source "drivers/staging/media/omap4iss/Kconfig" diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile index d3ff2d054be7..4861163371ef 100644 --- a/drivers/staging/media/Makefile +++ b/drivers/staging/media/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_DVB_CXD2099) += cxd2099/ obj-$(CONFIG_LIRC_STAGING) += lirc/ obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/ obj-$(CONFIG_VIDEO_MX2) += mx2/ +obj-$(CONFIG_VIDEO_MX3) += mx3/ obj-$(CONFIG_VIDEO_OMAP1) += omap1/ obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/ obj-$(CONFIG_DVB_MN88472) += mn88472/ diff --git a/drivers/staging/media/mx3/Kconfig b/drivers/staging/media/mx3/Kconfig new file mode 100644 index 000000000000..595d5fe7cad1 --- /dev/null +++ b/drivers/staging/media/mx3/Kconfig @@ -0,0 +1,15 @@ +config VIDEO_MX3 + tristate "i.MX3x Camera Sensor Interface driver" + depends on VIDEO_DEV && MX3_IPU && SOC_CAMERA + depends on MX3_IPU || COMPILE_TEST + depends on HAS_DMA + select VIDEOBUF2_DMA_CONTIG + ---help--- + This is a v4l2 driver for the i.MX3x Camera Sensor Interface + + This driver is deprecated: it should become a stand-alone driver + instead of using the soc-camera framework. + + Unless someone is willing to take this on (unlikely with such + ancient hardware) it is going to be removed from the kernel + soon. diff --git a/drivers/staging/media/mx3/Makefile b/drivers/staging/media/mx3/Makefile new file mode 100644 index 000000000000..6d91dcd80c1d --- /dev/null +++ b/drivers/staging/media/mx3/Makefile @@ -0,0 +1,3 @@ +# Makefile for i.MX3x Camera Sensor driver + +obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o diff --git a/drivers/staging/media/mx3/mx3_camera.c b/drivers/staging/media/mx3/mx3_camera.c new file mode 100644 index 000000000000..aa39e9569b1a --- /dev/null +++ b/drivers/staging/media/mx3/mx3_camera.c @@ -0,0 +1,1264 @@ +/* + * V4L2 Driver for i.MX3x camera host + * + * Copyright (C) 2008 + * Guennadi Liakhovetski, DENX Software Engineering, + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include + +#define MX3_CAM_DRV_NAME "mx3-camera" + +/* CMOS Sensor Interface Registers */ +#define CSI_REG_START 0x60 + +#define CSI_SENS_CONF (0x60 - CSI_REG_START) +#define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START) +#define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START) +#define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START) +#define CSI_TST_CTRL (0x70 - CSI_REG_START) +#define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START) +#define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START) +#define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START) +#define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START) +#define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START) + +#define CSI_SENS_CONF_VSYNC_POL_SHIFT 0 +#define CSI_SENS_CONF_HSYNC_POL_SHIFT 1 +#define CSI_SENS_CONF_DATA_POL_SHIFT 2 +#define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3 +#define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4 +#define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7 +#define CSI_SENS_CONF_DATA_FMT_SHIFT 8 +#define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10 +#define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15 +#define CSI_SENS_CONF_DIVRATIO_SHIFT 16 + +#define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT) +#define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT) +#define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT) + +#define MAX_VIDEO_MEM 16 + +struct mx3_camera_buffer { + /* common v4l buffer stuff -- must be first */ + struct vb2_v4l2_buffer vb; + struct list_head queue; + + /* One descriptot per scatterlist (per frame) */ + struct dma_async_tx_descriptor *txd; + + /* We have to "build" a scatterlist ourselves - one element per frame */ + struct scatterlist sg; +}; + +/** + * struct mx3_camera_dev - i.MX3x camera (CSI) object + * @dev: camera device, to which the coherent buffer is attached + * @icd: currently attached camera sensor + * @clk: pointer to clock + * @base: remapped register base address + * @pdata: platform data + * @platform_flags: platform flags + * @mclk: master clock frequency in Hz + * @capture: list of capture videobuffers + * @lock: protects video buffer lists + * @active: active video buffer + * @idmac_channel: array of pointers to IPU DMAC DMA channels + * @soc_host: embedded soc_host object + */ +struct mx3_camera_dev { + /* + * i.MX3x is only supposed to handle one camera on its Camera Sensor + * Interface. If anyone ever builds hardware to enable more than one + * camera _simultaneously_, they will have to modify this driver too + */ + struct clk *clk; + + void __iomem *base; + + struct mx3_camera_pdata *pdata; + + unsigned long platform_flags; + unsigned long mclk; + u16 width_flags; /* max 15 bits */ + + struct list_head capture; + spinlock_t lock; /* Protects video buffer lists */ + struct mx3_camera_buffer *active; + size_t buf_total; + struct vb2_alloc_ctx *alloc_ctx; + enum v4l2_field field; + int sequence; + + /* IDMAC / dmaengine interface */ + struct idmac_channel *idmac_channel[1]; /* We need one channel */ + + struct soc_camera_host soc_host; +}; + +struct dma_chan_request { + struct mx3_camera_dev *mx3_cam; + enum ipu_channel id; +}; + +static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg) +{ + return __raw_readl(mx3->base + reg); +} + +static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg) +{ + __raw_writel(value, mx3->base + reg); +} + +static struct mx3_camera_buffer *to_mx3_vb(struct vb2_v4l2_buffer *vb) +{ + return container_of(vb, struct mx3_camera_buffer, vb); +} + +/* Called from the IPU IDMAC ISR */ +static void mx3_cam_dma_done(void *arg) +{ + struct idmac_tx_desc *desc = to_tx_desc(arg); + struct dma_chan *chan = desc->txd.chan; + struct idmac_channel *ichannel = to_idmac_chan(chan); + struct mx3_camera_dev *mx3_cam = ichannel->client; + + dev_dbg(chan->device->dev, "callback cookie %d, active DMA %pad\n", + desc->txd.cookie, mx3_cam->active ? &sg_dma_address(&mx3_cam->active->sg) : NULL); + + spin_lock(&mx3_cam->lock); + if (mx3_cam->active) { + struct vb2_v4l2_buffer *vb = &mx3_cam->active->vb; + struct mx3_camera_buffer *buf = to_mx3_vb(vb); + + list_del_init(&buf->queue); + vb->vb2_buf.timestamp = ktime_get_ns(); + vb->field = mx3_cam->field; + vb->sequence = mx3_cam->sequence++; + vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE); + } + + if (list_empty(&mx3_cam->capture)) { + mx3_cam->active = NULL; + spin_unlock(&mx3_cam->lock); + + /* + * stop capture - without further buffers IPU_CHA_BUF0_RDY will + * not get updated + */ + return; + } + + mx3_cam->active = list_entry(mx3_cam->capture.next, + struct mx3_camera_buffer, queue); + spin_unlock(&mx3_cam->lock); +} + +/* + * Videobuf operations + */ + +/* + * Calculate the __buffer__ (not data) size and number of buffers. + */ +static int mx3_videobuf_setup(struct vb2_queue *vq, + unsigned int *count, unsigned int *num_planes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct soc_camera_device *icd = soc_camera_from_vb2q(vq); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + + if (!mx3_cam->idmac_channel[0]) + return -EINVAL; + + alloc_ctxs[0] = mx3_cam->alloc_ctx; + + if (!vq->num_buffers) + mx3_cam->sequence = 0; + + if (!*count) + *count = 2; + + /* Called from VIDIOC_REQBUFS or in compatibility mode */ + if (!*num_planes) + sizes[0] = icd->sizeimage; + else if (sizes[0] < icd->sizeimage) + return -EINVAL; + + /* If *num_planes != 0, we have already verified *count. */ + if (sizes[0] * *count + mx3_cam->buf_total > MAX_VIDEO_MEM * 1024 * 1024) + *count = (MAX_VIDEO_MEM * 1024 * 1024 - mx3_cam->buf_total) / + sizes[0]; + + *num_planes = 1; + + return 0; +} + +static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc) +{ + /* Add more formats as need arises and test possibilities appear... */ + switch (fourcc) { + case V4L2_PIX_FMT_RGB24: + return IPU_PIX_FMT_RGB24; + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_RGB565: + default: + return IPU_PIX_FMT_GENERIC; + } +} + +static void mx3_videobuf_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); + struct scatterlist *sg = &buf->sg; + struct dma_async_tx_descriptor *txd; + struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; + struct idmac_video_param *video = &ichan->params.video; + const struct soc_mbus_pixelfmt *host_fmt = icd->current_fmt->host_fmt; + dma_cookie_t cookie; + size_t new_size; + + new_size = icd->sizeimage; + + if (vb2_plane_size(vb, 0) < new_size) { + dev_err(icd->parent, "Buffer #%d too small (%lu < %zu)\n", + vbuf->vb2_buf.index, vb2_plane_size(vb, 0), new_size); + goto error; + } + + if (!buf->txd) { + sg_dma_address(sg) = vb2_dma_contig_plane_dma_addr(vb, 0); + sg_dma_len(sg) = new_size; + + txd = dmaengine_prep_slave_sg( + &ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT); + if (!txd) + goto error; + + txd->callback_param = txd; + txd->callback = mx3_cam_dma_done; + + buf->txd = txd; + } else { + txd = buf->txd; + } + + vb2_set_plane_payload(vb, 0, new_size); + + /* This is the configuration of one sg-element */ + video->out_pixel_fmt = fourcc_to_ipu_pix(host_fmt->fourcc); + + if (video->out_pixel_fmt == IPU_PIX_FMT_GENERIC) { + /* + * If the IPU DMA channel is configured to transfer generic + * 8-bit data, we have to set up the geometry parameters + * correctly, according to the current pixel format. The DMA + * horizontal parameters in this case are expressed in bytes, + * not in pixels. + */ + video->out_width = icd->bytesperline; + video->out_height = icd->user_height; + video->out_stride = icd->bytesperline; + } else { + /* + * For IPU known formats the pixel unit will be managed + * successfully by the IPU code + */ + video->out_width = icd->user_width; + video->out_height = icd->user_height; + video->out_stride = icd->user_width; + } + +#ifdef DEBUG + /* helps to see what DMA actually has written */ + if (vb2_plane_vaddr(vb, 0)) + memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0)); +#endif + + spin_lock_irq(&mx3_cam->lock); + list_add_tail(&buf->queue, &mx3_cam->capture); + + if (!mx3_cam->active) + mx3_cam->active = buf; + + spin_unlock_irq(&mx3_cam->lock); + + cookie = txd->tx_submit(txd); + dev_dbg(icd->parent, "Submitted cookie %d DMA %pad\n", + cookie, &sg_dma_address(&buf->sg)); + + if (cookie >= 0) + return; + + spin_lock_irq(&mx3_cam->lock); + + /* Submit error */ + list_del_init(&buf->queue); + + if (mx3_cam->active == buf) + mx3_cam->active = NULL; + + spin_unlock_irq(&mx3_cam->lock); +error: + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); +} + +static void mx3_videobuf_release(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); + struct dma_async_tx_descriptor *txd = buf->txd; + unsigned long flags; + + dev_dbg(icd->parent, + "Release%s DMA %pad, queue %sempty\n", + mx3_cam->active == buf ? " active" : "", &sg_dma_address(&buf->sg), + list_empty(&buf->queue) ? "" : "not "); + + spin_lock_irqsave(&mx3_cam->lock, flags); + + if (mx3_cam->active == buf) + mx3_cam->active = NULL; + + /* Doesn't hurt also if the list is empty */ + list_del_init(&buf->queue); + + if (txd) { + buf->txd = NULL; + if (mx3_cam->idmac_channel[0]) + async_tx_ack(txd); + } + + spin_unlock_irqrestore(&mx3_cam->lock, flags); + + mx3_cam->buf_total -= vb2_plane_size(vb, 0); +} + +static int mx3_videobuf_init(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct mx3_camera_buffer *buf = to_mx3_vb(vbuf); + + if (!buf->txd) { + /* This is for locking debugging only */ + INIT_LIST_HEAD(&buf->queue); + sg_init_table(&buf->sg, 1); + + mx3_cam->buf_total += vb2_plane_size(vb, 0); + } + + return 0; +} + +static void mx3_stop_streaming(struct vb2_queue *q) +{ + struct soc_camera_device *icd = soc_camera_from_vb2q(q); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; + struct mx3_camera_buffer *buf, *tmp; + unsigned long flags; + + if (ichan) + dmaengine_pause(&ichan->dma_chan); + + spin_lock_irqsave(&mx3_cam->lock, flags); + + mx3_cam->active = NULL; + + list_for_each_entry_safe(buf, tmp, &mx3_cam->capture, queue) { + list_del_init(&buf->queue); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + + spin_unlock_irqrestore(&mx3_cam->lock, flags); +} + +static struct vb2_ops mx3_videobuf_ops = { + .queue_setup = mx3_videobuf_setup, + .buf_queue = mx3_videobuf_queue, + .buf_cleanup = mx3_videobuf_release, + .buf_init = mx3_videobuf_init, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .stop_streaming = mx3_stop_streaming, +}; + +static int mx3_camera_init_videobuf(struct vb2_queue *q, + struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_USERPTR; + q->drv_priv = icd; + q->ops = &mx3_videobuf_ops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct mx3_camera_buffer); + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &ici->host_lock; + + return vb2_queue_init(q); +} + +/* First part of ipu_csi_init_interface() */ +static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam) +{ + u32 conf; + long rate; + + /* Set default size: ipu_csi_set_window_size() */ + csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE); + /* ...and position to 0:0: ipu_csi_set_window_pos() */ + conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; + csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL); + + /* We use only gated clock synchronisation mode so far */ + conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT; + + /* Set generic data, platform-biggest bus-width */ + conf |= CSI_SENS_CONF_DATA_FMT_BAYER; + + if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) + conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) + conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) + conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/ + conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + + if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC) + conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT; + if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC) + conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT; + if (mx3_cam->platform_flags & MX3_CAMERA_DP) + conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; + if (mx3_cam->platform_flags & MX3_CAMERA_PCP) + conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; + if (mx3_cam->platform_flags & MX3_CAMERA_HSP) + conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; + if (mx3_cam->platform_flags & MX3_CAMERA_VSP) + conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; + + /* ipu_csi_init_interface() */ + csi_reg_write(mx3_cam, conf, CSI_SENS_CONF); + + clk_prepare_enable(mx3_cam->clk); + rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk); + dev_dbg(mx3_cam->soc_host.v4l2_dev.dev, "Set SENS_CONF to %x, rate %ld\n", conf, rate); + if (rate) + clk_set_rate(mx3_cam->clk, rate); +} + +static int mx3_camera_add_device(struct soc_camera_device *icd) +{ + dev_info(icd->parent, "MX3 Camera driver attached to camera %d\n", + icd->devnum); + + return 0; +} + +static void mx3_camera_remove_device(struct soc_camera_device *icd) +{ + dev_info(icd->parent, "MX3 Camera driver detached from camera %d\n", + icd->devnum); +} + +/* Called with .host_lock held */ +static int mx3_camera_clock_start(struct soc_camera_host *ici) +{ + struct mx3_camera_dev *mx3_cam = ici->priv; + + mx3_camera_activate(mx3_cam); + + mx3_cam->buf_total = 0; + + return 0; +} + +/* Called with .host_lock held */ +static void mx3_camera_clock_stop(struct soc_camera_host *ici) +{ + struct mx3_camera_dev *mx3_cam = ici->priv; + struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; + + if (*ichan) { + dma_release_channel(&(*ichan)->dma_chan); + *ichan = NULL; + } + + clk_disable_unprepare(mx3_cam->clk); +} + +static int test_platform_param(struct mx3_camera_dev *mx3_cam, + unsigned char buswidth, unsigned long *flags) +{ + /* + * If requested data width is supported by the platform, use it or any + * possible lower value - i.MX31 is smart enough to shift bits + */ + if (buswidth > fls(mx3_cam->width_flags)) + return -EINVAL; + + /* + * Platform specified synchronization and pixel clock polarities are + * only a recommendation and are only used during probing. MX3x + * camera interface only works in master mode, i.e., uses HSYNC and + * VSYNC signals from the sensor + */ + *flags = V4L2_MBUS_MASTER | + V4L2_MBUS_HSYNC_ACTIVE_HIGH | + V4L2_MBUS_HSYNC_ACTIVE_LOW | + V4L2_MBUS_VSYNC_ACTIVE_HIGH | + V4L2_MBUS_VSYNC_ACTIVE_LOW | + V4L2_MBUS_PCLK_SAMPLE_RISING | + V4L2_MBUS_PCLK_SAMPLE_FALLING | + V4L2_MBUS_DATA_ACTIVE_HIGH | + V4L2_MBUS_DATA_ACTIVE_LOW; + + return 0; +} + +static int mx3_camera_try_bus_param(struct soc_camera_device *icd, + const unsigned int depth) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; + unsigned long bus_flags, common_flags; + int ret = test_platform_param(mx3_cam, depth, &bus_flags); + + dev_dbg(icd->parent, "request bus width %d bit: %d\n", depth, ret); + + if (ret < 0) + return ret; + + ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); + if (!ret) { + common_flags = soc_mbus_config_compatible(&cfg, + bus_flags); + if (!common_flags) { + dev_warn(icd->parent, + "Flags incompatible: camera 0x%x, host 0x%lx\n", + cfg.flags, bus_flags); + return -EINVAL; + } + } else if (ret != -ENOIOCTLCMD) { + return ret; + } + + return 0; +} + +static bool chan_filter(struct dma_chan *chan, void *arg) +{ + struct dma_chan_request *rq = arg; + struct mx3_camera_pdata *pdata; + + if (!imx_dma_is_ipu(chan)) + return false; + + if (!rq) + return false; + + pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data; + + return rq->id == chan->chan_id && + pdata->dma_dev == chan->device->dev; +} + +static const struct soc_mbus_pixelfmt mx3_camera_formats[] = { + { + .fourcc = V4L2_PIX_FMT_SBGGR8, + .name = "Bayer BGGR (sRGB) 8 bit", + .bits_per_sample = 8, + .packing = SOC_MBUS_PACKING_NONE, + .order = SOC_MBUS_ORDER_LE, + .layout = SOC_MBUS_LAYOUT_PACKED, + }, { + .fourcc = V4L2_PIX_FMT_GREY, + .name = "Monochrome 8 bit", + .bits_per_sample = 8, + .packing = SOC_MBUS_PACKING_NONE, + .order = SOC_MBUS_ORDER_LE, + .layout = SOC_MBUS_LAYOUT_PACKED, + }, +}; + +/* This will be corrected as we get more formats */ +static bool mx3_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt) +{ + return fmt->packing == SOC_MBUS_PACKING_NONE || + (fmt->bits_per_sample == 8 && + fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || + (fmt->bits_per_sample > 8 && + fmt->packing == SOC_MBUS_PACKING_EXTEND16); +} + +static int mx3_camera_get_formats(struct soc_camera_device *icd, unsigned int idx, + struct soc_camera_format_xlate *xlate) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct device *dev = icd->parent; + int formats = 0, ret; + struct v4l2_subdev_mbus_code_enum code = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + .index = idx, + }; + const struct soc_mbus_pixelfmt *fmt; + + ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code); + if (ret < 0) + /* No more formats */ + return 0; + + fmt = soc_mbus_get_fmtdesc(code.code); + if (!fmt) { + dev_warn(icd->parent, + "Unsupported format code #%u: 0x%x\n", idx, code.code); + return 0; + } + + /* This also checks support for the requested bits-per-sample */ + ret = mx3_camera_try_bus_param(icd, fmt->bits_per_sample); + if (ret < 0) + return 0; + + switch (code.code) { + case MEDIA_BUS_FMT_SBGGR10_1X10: + formats++; + if (xlate) { + xlate->host_fmt = &mx3_camera_formats[0]; + xlate->code = code.code; + xlate++; + dev_dbg(dev, "Providing format %s using code 0x%x\n", + mx3_camera_formats[0].name, code.code); + } + break; + case MEDIA_BUS_FMT_Y10_1X10: + formats++; + if (xlate) { + xlate->host_fmt = &mx3_camera_formats[1]; + xlate->code = code.code; + xlate++; + dev_dbg(dev, "Providing format %s using code 0x%x\n", + mx3_camera_formats[1].name, code.code); + } + break; + default: + if (!mx3_camera_packing_supported(fmt)) + return 0; + } + + /* Generic pass-through */ + formats++; + if (xlate) { + xlate->host_fmt = fmt; + xlate->code = code.code; + dev_dbg(dev, "Providing format %c%c%c%c in pass-through mode\n", + (fmt->fourcc >> (0*8)) & 0xFF, + (fmt->fourcc >> (1*8)) & 0xFF, + (fmt->fourcc >> (2*8)) & 0xFF, + (fmt->fourcc >> (3*8)) & 0xFF); + xlate++; + } + + return formats; +} + +static void configure_geometry(struct mx3_camera_dev *mx3_cam, + unsigned int width, unsigned int height, + const struct soc_mbus_pixelfmt *fmt) +{ + u32 ctrl, width_field, height_field; + + if (fourcc_to_ipu_pix(fmt->fourcc) == IPU_PIX_FMT_GENERIC) { + /* + * As the CSI will be configured to output BAYER, here + * the width parameter count the number of samples to + * capture to complete the whole image width. + */ + unsigned int num, den; + int ret = soc_mbus_samples_per_pixel(fmt, &num, &den); + BUG_ON(ret < 0); + width = width * num / den; + } + + /* Setup frame size - this cannot be changed on-the-fly... */ + width_field = width - 1; + height_field = height - 1; + csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE); + + csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1); + csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2); + + csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE); + + /* ...and position */ + ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; + /* Sensor does the cropping */ + csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL); +} + +static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam) +{ + dma_cap_mask_t mask; + struct dma_chan *chan; + struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; + /* We have to use IDMAC_IC_7 for Bayer / generic data */ + struct dma_chan_request rq = {.mx3_cam = mx3_cam, + .id = IDMAC_IC_7}; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_cap_set(DMA_PRIVATE, mask); + chan = dma_request_channel(mask, chan_filter, &rq); + if (!chan) + return -EBUSY; + + *ichan = to_idmac_chan(chan); + (*ichan)->client = mx3_cam; + + return 0; +} + +/* + * FIXME: learn to use stride != width, then we can keep stride properly aligned + * and support arbitrary (even) widths. + */ +static inline void stride_align(__u32 *width) +{ + if (ALIGN(*width, 8) < 4096) + *width = ALIGN(*width, 8); + else + *width = *width & ~7; +} + +/* + * As long as we don't implement host-side cropping and scaling, we can use + * default g_crop and cropcap from soc_camera.c + */ +static int mx3_camera_set_crop(struct soc_camera_device *icd, + const struct v4l2_crop *a) +{ + struct v4l2_crop a_writable = *a; + struct v4l2_rect *rect = &a_writable.c; + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + struct v4l2_mbus_framefmt *mf = &fmt.format; + int ret; + + soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096); + soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096); + + ret = v4l2_subdev_call(sd, video, s_crop, a); + if (ret < 0) + return ret; + + /* The capture device might have changed its output sizes */ + ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt); + if (ret < 0) + return ret; + + if (mf->code != icd->current_fmt->code) + return -EINVAL; + + if (mf->width & 7) { + /* Ouch! We can only handle 8-byte aligned width... */ + stride_align(&mf->width); + ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &fmt); + if (ret < 0) + return ret; + } + + if (mf->width != icd->user_width || mf->height != icd->user_height) + configure_geometry(mx3_cam, mf->width, mf->height, + icd->current_fmt->host_fmt); + + dev_dbg(icd->parent, "Sensor cropped %dx%d\n", + mf->width, mf->height); + + icd->user_width = mf->width; + icd->user_height = mf->height; + + return ret; +} + +static int mx3_camera_set_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + const struct soc_camera_format_xlate *xlate; + struct v4l2_pix_format *pix = &f->fmt.pix; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + struct v4l2_mbus_framefmt *mf = &format.format; + int ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); + if (!xlate) { + dev_warn(icd->parent, "Format %x not found\n", + pix->pixelformat); + return -EINVAL; + } + + stride_align(&pix->width); + dev_dbg(icd->parent, "Set format %dx%d\n", pix->width, pix->height); + + /* + * Might have to perform a complete interface initialisation like in + * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider + * mxc_v4l2_s_fmt() + */ + + configure_geometry(mx3_cam, pix->width, pix->height, xlate->host_fmt); + + mf->width = pix->width; + mf->height = pix->height; + mf->field = pix->field; + mf->colorspace = pix->colorspace; + mf->code = xlate->code; + + ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format); + if (ret < 0) + return ret; + + if (mf->code != xlate->code) + return -EINVAL; + + if (!mx3_cam->idmac_channel[0]) { + ret = acquire_dma_channel(mx3_cam); + if (ret < 0) + return ret; + } + + pix->width = mf->width; + pix->height = mf->height; + pix->field = mf->field; + mx3_cam->field = mf->field; + pix->colorspace = mf->colorspace; + icd->current_fmt = xlate; + + dev_dbg(icd->parent, "Sensor set %dx%d\n", pix->width, pix->height); + + return ret; +} + +static int mx3_camera_try_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + const struct soc_camera_format_xlate *xlate; + struct v4l2_pix_format *pix = &f->fmt.pix; + struct v4l2_subdev_pad_config pad_cfg; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_TRY, + }; + struct v4l2_mbus_framefmt *mf = &format.format; + __u32 pixfmt = pix->pixelformat; + int ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); + if (pixfmt && !xlate) { + dev_warn(icd->parent, "Format %x not found\n", pixfmt); + return -EINVAL; + } + + /* limit to MX3 hardware capabilities */ + if (pix->height > 4096) + pix->height = 4096; + if (pix->width > 4096) + pix->width = 4096; + + /* limit to sensor capabilities */ + mf->width = pix->width; + mf->height = pix->height; + mf->field = pix->field; + mf->colorspace = pix->colorspace; + mf->code = xlate->code; + + ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format); + if (ret < 0) + return ret; + + pix->width = mf->width; + pix->height = mf->height; + pix->colorspace = mf->colorspace; + + switch (mf->field) { + case V4L2_FIELD_ANY: + pix->field = V4L2_FIELD_NONE; + break; + case V4L2_FIELD_NONE: + break; + default: + dev_err(icd->parent, "Field type %d unsupported.\n", + mf->field); + ret = -EINVAL; + } + + return ret; +} + +static int mx3_camera_reqbufs(struct soc_camera_device *icd, + struct v4l2_requestbuffers *p) +{ + return 0; +} + +static unsigned int mx3_camera_poll(struct file *file, poll_table *pt) +{ + struct soc_camera_device *icd = file->private_data; + + return vb2_poll(&icd->vb2_vidq, file, pt); +} + +static int mx3_camera_querycap(struct soc_camera_host *ici, + struct v4l2_capability *cap) +{ + /* cap->name is set by the firendly caller:-> */ + strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card)); + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +static int mx3_camera_set_bus_param(struct soc_camera_device *icd) +{ + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + struct mx3_camera_dev *mx3_cam = ici->priv; + struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; + u32 pixfmt = icd->current_fmt->host_fmt->fourcc; + unsigned long bus_flags, common_flags; + u32 dw, sens_conf; + const struct soc_mbus_pixelfmt *fmt; + int buswidth; + int ret; + const struct soc_camera_format_xlate *xlate; + struct device *dev = icd->parent; + + fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code); + if (!fmt) + return -EINVAL; + + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); + if (!xlate) { + dev_warn(dev, "Format %x not found\n", pixfmt); + return -EINVAL; + } + + buswidth = fmt->bits_per_sample; + ret = test_platform_param(mx3_cam, buswidth, &bus_flags); + + dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret); + + if (ret < 0) + return ret; + + ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); + if (!ret) { + common_flags = soc_mbus_config_compatible(&cfg, + bus_flags); + if (!common_flags) { + dev_warn(icd->parent, + "Flags incompatible: camera 0x%x, host 0x%lx\n", + cfg.flags, bus_flags); + return -EINVAL; + } + } else if (ret != -ENOIOCTLCMD) { + return ret; + } else { + common_flags = bus_flags; + } + + dev_dbg(dev, "Flags cam: 0x%x host: 0x%lx common: 0x%lx\n", + cfg.flags, bus_flags, common_flags); + + /* Make choices, based on platform preferences */ + if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && + (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { + if (mx3_cam->platform_flags & MX3_CAMERA_HSP) + common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH; + else + common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW; + } + + if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) && + (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) { + if (mx3_cam->platform_flags & MX3_CAMERA_VSP) + common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH; + else + common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW; + } + + if ((common_flags & V4L2_MBUS_DATA_ACTIVE_HIGH) && + (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)) { + if (mx3_cam->platform_flags & MX3_CAMERA_DP) + common_flags &= ~V4L2_MBUS_DATA_ACTIVE_HIGH; + else + common_flags &= ~V4L2_MBUS_DATA_ACTIVE_LOW; + } + + if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) && + (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) { + if (mx3_cam->platform_flags & MX3_CAMERA_PCP) + common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING; + else + common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING; + } + + cfg.flags = common_flags; + ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); + if (ret < 0 && ret != -ENOIOCTLCMD) { + dev_dbg(dev, "camera s_mbus_config(0x%lx) returned %d\n", + common_flags, ret); + return ret; + } + + /* + * So far only gated clock mode is supported. Add a line + * (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) | + * below and select the required mode when supporting other + * synchronisation protocols. + */ + sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) & + ~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) | + (1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) | + (1 << CSI_SENS_CONF_DATA_POL_SHIFT) | + (1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) | + (3 << CSI_SENS_CONF_DATA_FMT_SHIFT) | + (3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT)); + + /* TODO: Support RGB and YUV formats */ + + /* This has been set in mx3_camera_activate(), but we clear it above */ + sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER; + + if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) + sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; + if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) + sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; + if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) + sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; + if (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW) + sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; + + /* Just do what we're asked to do */ + switch (xlate->host_fmt->bits_per_sample) { + case 4: + dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + break; + case 8: + dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + break; + case 10: + dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + break; + default: + /* + * Actually it can only be 15 now, default is just to silence + * compiler warnings + */ + case 15: + dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; + } + + csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF); + + dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw); + + return 0; +} + +static struct soc_camera_host_ops mx3_soc_camera_host_ops = { + .owner = THIS_MODULE, + .add = mx3_camera_add_device, + .remove = mx3_camera_remove_device, + .clock_start = mx3_camera_clock_start, + .clock_stop = mx3_camera_clock_stop, + .set_crop = mx3_camera_set_crop, + .set_fmt = mx3_camera_set_fmt, + .try_fmt = mx3_camera_try_fmt, + .get_formats = mx3_camera_get_formats, + .init_videobuf2 = mx3_camera_init_videobuf, + .reqbufs = mx3_camera_reqbufs, + .poll = mx3_camera_poll, + .querycap = mx3_camera_querycap, + .set_bus_param = mx3_camera_set_bus_param, +}; + +static int mx3_camera_probe(struct platform_device *pdev) +{ + struct mx3_camera_pdata *pdata = pdev->dev.platform_data; + struct mx3_camera_dev *mx3_cam; + struct resource *res; + void __iomem *base; + int err = 0; + struct soc_camera_host *soc_host; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (!pdata) + return -EINVAL; + + mx3_cam = devm_kzalloc(&pdev->dev, sizeof(*mx3_cam), GFP_KERNEL); + if (!mx3_cam) { + dev_err(&pdev->dev, "Could not allocate mx3 camera object\n"); + return -ENOMEM; + } + + mx3_cam->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(mx3_cam->clk)) + return PTR_ERR(mx3_cam->clk); + + mx3_cam->pdata = pdata; + mx3_cam->platform_flags = pdata->flags; + if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_MASK)) { + /* + * Platform hasn't set available data widths. This is bad. + * Warn and use a default. + */ + dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " + "data widths, using default 8 bit\n"); + mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8; + } + if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4) + mx3_cam->width_flags = 1 << 3; + if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) + mx3_cam->width_flags |= 1 << 7; + if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) + mx3_cam->width_flags |= 1 << 9; + if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) + mx3_cam->width_flags |= 1 << 14; + + mx3_cam->mclk = pdata->mclk_10khz * 10000; + if (!mx3_cam->mclk) { + dev_warn(&pdev->dev, + "mclk_10khz == 0! Please, fix your platform data. " + "Using default 20MHz\n"); + mx3_cam->mclk = 20000000; + } + + /* list of video-buffers */ + INIT_LIST_HEAD(&mx3_cam->capture); + spin_lock_init(&mx3_cam->lock); + + mx3_cam->base = base; + + soc_host = &mx3_cam->soc_host; + soc_host->drv_name = MX3_CAM_DRV_NAME; + soc_host->ops = &mx3_soc_camera_host_ops; + soc_host->priv = mx3_cam; + soc_host->v4l2_dev.dev = &pdev->dev; + soc_host->nr = pdev->id; + + mx3_cam->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(mx3_cam->alloc_ctx)) + return PTR_ERR(mx3_cam->alloc_ctx); + + if (pdata->asd_sizes) { + soc_host->asd = pdata->asd; + soc_host->asd_sizes = pdata->asd_sizes; + } + + err = soc_camera_host_register(soc_host); + if (err) + goto ecamhostreg; + + /* IDMAC interface */ + dmaengine_get(); + + return 0; + +ecamhostreg: + vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); + return err; +} + +static int mx3_camera_remove(struct platform_device *pdev) +{ + struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); + struct mx3_camera_dev *mx3_cam = container_of(soc_host, + struct mx3_camera_dev, soc_host); + + soc_camera_host_unregister(soc_host); + + /* + * The channel has either not been allocated, + * or should have been released + */ + if (WARN_ON(mx3_cam->idmac_channel[0])) + dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan); + + vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx); + + dmaengine_put(); + + return 0; +} + +static struct platform_driver mx3_camera_driver = { + .driver = { + .name = MX3_CAM_DRV_NAME, + }, + .probe = mx3_camera_probe, + .remove = mx3_camera_remove, +}; + +module_platform_driver(mx3_camera_driver); + +MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver"); +MODULE_AUTHOR("Guennadi Liakhovetski "); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.2.3"); +MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME);