| /* |
| * V4L2 Driver for i.MX3x camera host |
| * |
| * Copyright (C) 2008 |
| * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de> |
| * |
| * 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 <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/videodev2.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/vmalloc.h> |
| #include <linux/interrupt.h> |
| #include <linux/sched.h> |
| |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-dev.h> |
| #include <media/videobuf2-dma-contig.h> |
| #include <media/soc_camera.h> |
| #include <media/soc_mediabus.h> |
| |
| #include <mach/ipu.h> |
| #include <mach/mx3_camera.h> |
| #include <mach/dma.h> |
| |
| #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 |
| |
| enum csi_buffer_state { |
| CSI_BUF_NEEDS_INIT, |
| CSI_BUF_PREPARED, |
| }; |
| |
| struct mx3_camera_buffer { |
| /* common v4l buffer stuff -- must be first */ |
| struct vb2_buffer vb; |
| enum csi_buffer_state state; |
| 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 soc_camera_device *icd; |
| struct clk *clk; |
| |
| void __iomem *base; |
| |
| struct mx3_camera_pdata *pdata; |
| |
| unsigned long platform_flags; |
| unsigned long mclk; |
| |
| struct list_head capture; |
| spinlock_t lock; /* Protects video buffer lists */ |
| struct mx3_camera_buffer *active; |
| 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_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 0x%08x\n", |
| desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0); |
| |
| spin_lock(&mx3_cam->lock); |
| if (mx3_cam->active) { |
| struct vb2_buffer *vb = &mx3_cam->active->vb; |
| struct mx3_camera_buffer *buf = to_mx3_vb(vb); |
| |
| list_del_init(&buf->queue); |
| do_gettimeofday(&vb->v4l2_buf.timestamp); |
| vb->v4l2_buf.field = mx3_cam->field; |
| vb->v4l2_buf.sequence = mx3_cam->sequence++; |
| vb2_buffer_done(vb, 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 long 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; |
| int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| |
| if (bytes_per_line < 0) |
| return bytes_per_line; |
| |
| if (!mx3_cam->idmac_channel[0]) |
| return -EINVAL; |
| |
| *num_planes = 1; |
| |
| mx3_cam->sequence = 0; |
| sizes[0] = bytes_per_line * icd->user_height; |
| alloc_ctxs[0] = mx3_cam->alloc_ctx; |
| |
| if (!*count) |
| *count = 32; |
| |
| if (sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024) |
| *count = MAX_VIDEO_MEM * 1024 * 1024 / sizes[0]; |
| |
| return 0; |
| } |
| |
| static int mx3_videobuf_prepare(struct vb2_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 idmac_channel *ichan = mx3_cam->idmac_channel[0]; |
| struct scatterlist *sg; |
| struct mx3_camera_buffer *buf; |
| size_t new_size; |
| int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| |
| if (bytes_per_line < 0) |
| return bytes_per_line; |
| |
| buf = to_mx3_vb(vb); |
| sg = &buf->sg; |
| |
| new_size = bytes_per_line * icd->user_height; |
| |
| if (vb2_plane_size(vb, 0) < new_size) { |
| dev_err(icd->parent, "Buffer too small (%lu < %zu)\n", |
| vb2_plane_size(vb, 0), new_size); |
| return -ENOBUFS; |
| } |
| |
| if (buf->state == CSI_BUF_NEEDS_INIT) { |
| sg_dma_address(sg) = vb2_dma_contig_plane_paddr(vb, 0); |
| sg_dma_len(sg) = new_size; |
| |
| buf->txd = ichan->dma_chan.device->device_prep_slave_sg( |
| &ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM, |
| DMA_PREP_INTERRUPT); |
| if (!buf->txd) |
| return -EIO; |
| |
| buf->txd->callback_param = buf->txd; |
| buf->txd->callback = mx3_cam_dma_done; |
| |
| buf->state = CSI_BUF_PREPARED; |
| } |
| |
| vb2_set_plane_payload(vb, 0, new_size); |
| |
| 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 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(vb); |
| struct dma_async_tx_descriptor *txd = buf->txd; |
| struct idmac_channel *ichan = to_idmac_chan(txd->chan); |
| struct idmac_video_param *video = &ichan->params.video; |
| dma_cookie_t cookie; |
| u32 fourcc = icd->current_fmt->host_fmt->fourcc; |
| unsigned long flags; |
| |
| /* This is the configuration of one sg-element */ |
| video->out_pixel_fmt = fourcc_to_ipu_pix(fourcc); |
| |
| if (video->out_pixel_fmt == IPU_PIX_FMT_GENERIC) { |
| /* |
| * If the IPU DMA channel is configured to transport |
| * generic 8-bit data, we have to set up correctly the |
| * geometry parameters upon the current pixel format. |
| * So, since the DMA horizontal parameters are expressed |
| * in bytes not pixels, convert these in the right unit. |
| */ |
| int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| BUG_ON(bytes_per_line <= 0); |
| |
| video->out_width = bytes_per_line; |
| video->out_height = icd->user_height; |
| video->out_stride = bytes_per_line; |
| } 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_irqsave(&mx3_cam->lock, flags); |
| 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 0x%08x\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_irqrestore(&mx3_cam->lock, flags); |
| vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
| } |
| |
| static void mx3_videobuf_release(struct vb2_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(vb); |
| struct dma_async_tx_descriptor *txd = buf->txd; |
| unsigned long flags; |
| |
| dev_dbg(icd->parent, |
| "Release%s DMA 0x%08x, 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); |
| buf->state = CSI_BUF_NEEDS_INIT; |
| |
| if (txd) { |
| buf->txd = NULL; |
| if (mx3_cam->idmac_channel[0]) |
| async_tx_ack(txd); |
| } |
| |
| spin_unlock_irqrestore(&mx3_cam->lock, flags); |
| } |
| |
| static int mx3_videobuf_init(struct vb2_buffer *vb) |
| { |
| struct mx3_camera_buffer *buf = to_mx3_vb(vb); |
| /* This is for locking debugging only */ |
| INIT_LIST_HEAD(&buf->queue); |
| sg_init_table(&buf->sg, 1); |
| |
| buf->state = CSI_BUF_NEEDS_INIT; |
| buf->txd = NULL; |
| |
| return 0; |
| } |
| |
| static int 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 dma_chan *chan; |
| struct mx3_camera_buffer *buf, *tmp; |
| unsigned long flags; |
| |
| if (ichan) { |
| chan = &ichan->dma_chan; |
| chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); |
| } |
| |
| spin_lock_irqsave(&mx3_cam->lock, flags); |
| |
| mx3_cam->active = NULL; |
| |
| list_for_each_entry_safe(buf, tmp, &mx3_cam->capture, queue) { |
| buf->state = CSI_BUF_NEEDS_INIT; |
| list_del_init(&buf->queue); |
| } |
| |
| spin_unlock_irqrestore(&mx3_cam->lock, flags); |
| |
| return 0; |
| } |
| |
| static struct vb2_ops mx3_videobuf_ops = { |
| .queue_setup = mx3_videobuf_setup, |
| .buf_prepare = mx3_videobuf_prepare, |
| .buf_queue = mx3_videobuf_queue, |
| .buf_cleanup = mx3_videobuf_release, |
| .buf_init = mx3_videobuf_init, |
| .wait_prepare = soc_camera_unlock, |
| .wait_finish = soc_camera_lock, |
| .stop_streaming = mx3_stop_streaming, |
| }; |
| |
| static int mx3_camera_init_videobuf(struct vb2_queue *q, |
| struct soc_camera_device *icd) |
| { |
| q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| q->io_modes = VB2_MMAP | VB2_USERPTR; |
| q->drv_priv = icd; |
| q->ops = &mx3_videobuf_ops; |
| q->mem_ops = &vb2_dma_contig_memops; |
| q->buf_struct_size = sizeof(struct mx3_camera_buffer); |
| |
| return vb2_queue_init(q); |
| } |
| |
| /* First part of ipu_csi_init_interface() */ |
| static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam, |
| struct soc_camera_device *icd) |
| { |
| 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_enable(mx3_cam->clk); |
| rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk); |
| dev_dbg(icd->parent, "Set SENS_CONF to %x, rate %ld\n", conf, rate); |
| if (rate) |
| clk_set_rate(mx3_cam->clk, rate); |
| } |
| |
| /* Called with .video_lock held */ |
| static int mx3_camera_add_device(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct mx3_camera_dev *mx3_cam = ici->priv; |
| |
| if (mx3_cam->icd) |
| return -EBUSY; |
| |
| mx3_camera_activate(mx3_cam, icd); |
| |
| mx3_cam->icd = icd; |
| |
| dev_info(icd->parent, "MX3 Camera driver attached to camera %d\n", |
| icd->devnum); |
| |
| return 0; |
| } |
| |
| /* Called with .video_lock held */ |
| static void mx3_camera_remove_device(struct soc_camera_device *icd) |
| { |
| 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]; |
| |
| BUG_ON(icd != mx3_cam->icd); |
| |
| if (*ichan) { |
| dma_release_channel(&(*ichan)->dma_chan); |
| *ichan = NULL; |
| } |
| |
| clk_disable(mx3_cam->clk); |
| |
| mx3_cam->icd = NULL; |
| |
| dev_info(icd->parent, "MX3 Camera driver detached from camera %d\n", |
| icd->devnum); |
| } |
| |
| static int test_platform_param(struct mx3_camera_dev *mx3_cam, |
| unsigned char buswidth, unsigned long *flags) |
| { |
| /* |
| * 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 = SOCAM_MASTER | |
| SOCAM_HSYNC_ACTIVE_HIGH | |
| SOCAM_HSYNC_ACTIVE_LOW | |
| SOCAM_VSYNC_ACTIVE_HIGH | |
| SOCAM_VSYNC_ACTIVE_LOW | |
| SOCAM_PCLK_SAMPLE_RISING | |
| SOCAM_PCLK_SAMPLE_FALLING | |
| SOCAM_DATA_ACTIVE_HIGH | |
| SOCAM_DATA_ACTIVE_LOW; |
| |
| /* |
| * If requested data width is supported by the platform, use it or any |
| * possible lower value - i.MX31 is smart enough to schift bits |
| */ |
| if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) |
| *flags |= SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_10 | |
| SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4; |
| else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) |
| *flags |= SOCAM_DATAWIDTH_10 | SOCAM_DATAWIDTH_8 | |
| SOCAM_DATAWIDTH_4; |
| else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) |
| *flags |= SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4; |
| else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4) |
| *flags |= SOCAM_DATAWIDTH_4; |
| |
| switch (buswidth) { |
| case 15: |
| if (!(*flags & SOCAM_DATAWIDTH_15)) |
| return -EINVAL; |
| break; |
| case 10: |
| if (!(*flags & SOCAM_DATAWIDTH_10)) |
| return -EINVAL; |
| break; |
| case 8: |
| if (!(*flags & SOCAM_DATAWIDTH_8)) |
| return -EINVAL; |
| break; |
| case 4: |
| if (!(*flags & SOCAM_DATAWIDTH_4)) |
| return -EINVAL; |
| break; |
| default: |
| dev_warn(mx3_cam->soc_host.v4l2_dev.dev, |
| "Unsupported bus width %d\n", buswidth); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int mx3_camera_try_bus_param(struct soc_camera_device *icd, |
| const unsigned int depth) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct mx3_camera_dev *mx3_cam = ici->priv; |
| unsigned long bus_flags, camera_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; |
| |
| camera_flags = icd->ops->query_bus_param(icd); |
| |
| ret = soc_camera_bus_param_compatible(camera_flags, bus_flags); |
| if (ret < 0) |
| dev_warn(icd->parent, |
| "Flags incompatible: camera %lx, host %lx\n", |
| camera_flags, bus_flags); |
| |
| return ret; |
| } |
| |
| 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, |
| }, { |
| .fourcc = V4L2_PIX_FMT_GREY, |
| .name = "Monochrome 8 bit", |
| .bits_per_sample = 8, |
| .packing = SOC_MBUS_PACKING_NONE, |
| .order = SOC_MBUS_ORDER_LE, |
| }, |
| }; |
| |
| /* 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; |
| enum v4l2_mbus_pixelcode code; |
| const struct soc_mbus_pixelfmt *fmt; |
| |
| ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); |
| if (ret < 0) |
| /* No more formats */ |
| return 0; |
| |
| fmt = soc_mbus_get_fmtdesc(code); |
| if (!fmt) { |
| dev_warn(icd->parent, |
| "Unsupported format code #%u: %d\n", idx, 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) { |
| case V4L2_MBUS_FMT_SBGGR10_1X10: |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = &mx3_camera_formats[0]; |
| xlate->code = code; |
| xlate++; |
| dev_dbg(dev, "Providing format %s using code %d\n", |
| mx3_camera_formats[0].name, code); |
| } |
| break; |
| case V4L2_MBUS_FMT_Y10_1X10: |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = &mx3_camera_formats[1]; |
| xlate->code = code; |
| xlate++; |
| dev_dbg(dev, "Providing format %s using code %d\n", |
| mx3_camera_formats[1].name, code); |
| } |
| break; |
| default: |
| if (!mx3_camera_packing_supported(fmt)) |
| return 0; |
| } |
| |
| /* Generic pass-through */ |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = fmt; |
| xlate->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, |
| struct v4l2_crop *a) |
| { |
| struct v4l2_rect *rect = &a->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_mbus_framefmt mf; |
| 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, video, g_mbus_fmt, &mf); |
| 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, video, s_mbus_fmt, &mf); |
| 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_mbus_framefmt mf; |
| 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, video, s_mbus_fmt, &mf); |
| 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_mbus_framefmt mf; |
| __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, video, try_mbus_fmt, &mf); |
| 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->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| |
| return 0; |
| } |
| |
| static int mx3_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
| struct mx3_camera_dev *mx3_cam = ici->priv; |
| unsigned long bus_flags, camera_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; |
| |
| buswidth = fmt->bits_per_sample; |
| ret = test_platform_param(mx3_cam, buswidth, &bus_flags); |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(dev, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret); |
| |
| if (ret < 0) |
| return ret; |
| |
| camera_flags = icd->ops->query_bus_param(icd); |
| |
| common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); |
| dev_dbg(dev, "Flags cam: 0x%lx host: 0x%lx common: 0x%lx\n", |
| camera_flags, bus_flags, common_flags); |
| if (!common_flags) { |
| dev_dbg(dev, "no common flags"); |
| return -EINVAL; |
| } |
| |
| /* Make choices, based on platform preferences */ |
| if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && |
| (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { |
| if (mx3_cam->platform_flags & MX3_CAMERA_HSP) |
| common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; |
| else |
| common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; |
| } |
| |
| if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && |
| (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { |
| if (mx3_cam->platform_flags & MX3_CAMERA_VSP) |
| common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; |
| else |
| common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; |
| } |
| |
| if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && |
| (common_flags & SOCAM_DATA_ACTIVE_LOW)) { |
| if (mx3_cam->platform_flags & MX3_CAMERA_DP) |
| common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; |
| else |
| common_flags &= ~SOCAM_DATA_ACTIVE_LOW; |
| } |
| |
| if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && |
| (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { |
| if (mx3_cam->platform_flags & MX3_CAMERA_PCP) |
| common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; |
| else |
| common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; |
| } |
| |
| /* |
| * Make the camera work in widest common mode, we'll take care of |
| * the rest |
| */ |
| if (common_flags & SOCAM_DATAWIDTH_15) |
| common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | |
| SOCAM_DATAWIDTH_15; |
| else if (common_flags & SOCAM_DATAWIDTH_10) |
| common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | |
| SOCAM_DATAWIDTH_10; |
| else if (common_flags & SOCAM_DATAWIDTH_8) |
| common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | |
| SOCAM_DATAWIDTH_8; |
| else |
| common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | |
| SOCAM_DATAWIDTH_4; |
| |
| ret = icd->ops->set_bus_param(icd, common_flags); |
| if (ret < 0) { |
| dev_dbg(dev, "camera set_bus_param(%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 & SOCAM_PCLK_SAMPLE_FALLING) |
| sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; |
| if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) |
| sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; |
| if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) |
| sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; |
| if (common_flags & SOCAM_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, |
| .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 __devinit mx3_camera_probe(struct platform_device *pdev) |
| { |
| 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); |
| if (!res) { |
| err = -ENODEV; |
| goto egetres; |
| } |
| |
| mx3_cam = vzalloc(sizeof(*mx3_cam)); |
| if (!mx3_cam) { |
| dev_err(&pdev->dev, "Could not allocate mx3 camera object\n"); |
| err = -ENOMEM; |
| goto ealloc; |
| } |
| |
| mx3_cam->clk = clk_get(&pdev->dev, NULL); |
| if (IS_ERR(mx3_cam->clk)) { |
| err = PTR_ERR(mx3_cam->clk); |
| goto eclkget; |
| } |
| |
| mx3_cam->pdata = pdev->dev.platform_data; |
| mx3_cam->platform_flags = mx3_cam->pdata->flags; |
| if (!(mx3_cam->platform_flags & (MX3_CAMERA_DATAWIDTH_4 | |
| MX3_CAMERA_DATAWIDTH_8 | MX3_CAMERA_DATAWIDTH_10 | |
| MX3_CAMERA_DATAWIDTH_15))) { |
| /* |
| * 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; |
| } |
| |
| mx3_cam->mclk = mx3_cam->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); |
| |
| base = ioremap(res->start, resource_size(res)); |
| if (!base) { |
| pr_err("Couldn't map %x@%x\n", resource_size(res), res->start); |
| err = -ENOMEM; |
| goto eioremap; |
| } |
| |
| 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)) { |
| err = PTR_ERR(mx3_cam->alloc_ctx); |
| goto eallocctx; |
| } |
| |
| 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); |
| eallocctx: |
| iounmap(base); |
| eioremap: |
| clk_put(mx3_cam->clk); |
| eclkget: |
| vfree(mx3_cam); |
| ealloc: |
| egetres: |
| return err; |
| } |
| |
| static int __devexit 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); |
| |
| clk_put(mx3_cam->clk); |
| |
| soc_camera_host_unregister(soc_host); |
| |
| iounmap(mx3_cam->base); |
| |
| /* |
| * 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); |
| |
| vfree(mx3_cam); |
| |
| dmaengine_put(); |
| |
| dev_info(&pdev->dev, "i.MX3x Camera driver unloaded\n"); |
| |
| return 0; |
| } |
| |
| static struct platform_driver mx3_camera_driver = { |
| .driver = { |
| .name = MX3_CAM_DRV_NAME, |
| }, |
| .probe = mx3_camera_probe, |
| .remove = __devexit_p(mx3_camera_remove), |
| }; |
| |
| |
| static int __init mx3_camera_init(void) |
| { |
| return platform_driver_register(&mx3_camera_driver); |
| } |
| |
| static void __exit mx3_camera_exit(void) |
| { |
| platform_driver_unregister(&mx3_camera_driver); |
| } |
| |
| module_init(mx3_camera_init); |
| module_exit(mx3_camera_exit); |
| |
| MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver"); |
| MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_VERSION("0.2.3"); |
| MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME); |