---help---
Enable debug messages on OMAP 3 camera controller driver.
+config VIDEO_PXA27x
+ tristate "PXA27x Quick Capture Interface driver"
+ depends on VIDEO_DEV && PXA27x && HAS_DMA
+ select VIDEOBUF2_DMA_SG
+ select SG_SPLIT
+ ---help---
+ This is a v4l2 driver for the PXA27x Quick Capture Interface
+
config VIDEO_S3C_CAMIF
tristate "Samsung S3C24XX/S3C64XX SoC Camera Interface driver"
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
obj-$(CONFIG_VIDEO_MMP_CAMERA) += marvell-ccic/
obj-$(CONFIG_VIDEO_OMAP3) += omap3isp/
+obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o soc_camera/soc_mediabus.o
obj-$(CONFIG_VIDEO_VIU) += fsl-viu.o
--- /dev/null
+/*
+ * V4L2 Driver for PXA camera host
+ *
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ * Copyright (C) 2016, Robert Jarzmik <robert.jarzmik@free.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/time.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma/pxa-dma.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-clk.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-of.h>
+
+#include <media/drv-intf/soc_mediabus.h>
+#include <media/videobuf2-dma-sg.h>
+
+#include <linux/videodev2.h>
+
+#include <linux/platform_data/media/camera-pxa.h>
+
+#define PXA_CAM_VERSION "0.0.6"
+#define PXA_CAM_DRV_NAME "pxa27x-camera"
+
+#define DEFAULT_WIDTH 640
+#define DEFAULT_HEIGHT 480
+
+/* Camera Interface */
+#define CICR0 0x0000
+#define CICR1 0x0004
+#define CICR2 0x0008
+#define CICR3 0x000C
+#define CICR4 0x0010
+#define CISR 0x0014
+#define CIFR 0x0018
+#define CITOR 0x001C
+#define CIBR0 0x0028
+#define CIBR1 0x0030
+#define CIBR2 0x0038
+
+#define CICR0_DMAEN (1 << 31) /* DMA request enable */
+#define CICR0_PAR_EN (1 << 30) /* Parity enable */
+#define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
+#define CICR0_ENB (1 << 28) /* Camera interface enable */
+#define CICR0_DIS (1 << 27) /* Camera interface disable */
+#define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
+#define CICR0_TOM (1 << 9) /* Time-out mask */
+#define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
+#define CICR0_FEM (1 << 7) /* FIFO-empty mask */
+#define CICR0_EOLM (1 << 6) /* End-of-line mask */
+#define CICR0_PERRM (1 << 5) /* Parity-error mask */
+#define CICR0_QDM (1 << 4) /* Quick-disable mask */
+#define CICR0_CDM (1 << 3) /* Disable-done mask */
+#define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
+#define CICR0_EOFM (1 << 1) /* End-of-frame mask */
+#define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
+
+#define CICR1_TBIT (1 << 31) /* Transparency bit */
+#define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
+#define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
+#define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
+#define CICR1_RGB_F (1 << 11) /* RGB format */
+#define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
+#define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
+#define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
+#define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
+#define CICR1_DW (0x7 << 0) /* Data width mask */
+
+#define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
+ wait count mask */
+#define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
+ wait count mask */
+#define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
+#define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
+ wait count mask */
+#define CICR2_FSW (0x7 << 0) /* Frame stabilization
+ wait count mask */
+
+#define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
+ wait count mask */
+#define CICR3_EFW (0xff << 16) /* End-of-frame line clock
+ wait count mask */
+#define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
+#define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
+ wait count mask */
+#define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
+
+#define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
+#define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
+#define CICR4_PCP (1 << 22) /* Pixel clock polarity */
+#define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
+#define CICR4_VSP (1 << 20) /* Vertical sync polarity */
+#define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
+#define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
+#define CICR4_DIV (0xff << 0) /* Clock divisor mask */
+
+#define CISR_FTO (1 << 15) /* FIFO time-out */
+#define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
+#define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
+#define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
+#define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
+#define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
+#define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
+#define CISR_EOL (1 << 8) /* End of line */
+#define CISR_PAR_ERR (1 << 7) /* Parity error */
+#define CISR_CQD (1 << 6) /* Camera interface quick disable */
+#define CISR_CDD (1 << 5) /* Camera interface disable done */
+#define CISR_SOF (1 << 4) /* Start of frame */
+#define CISR_EOF (1 << 3) /* End of frame */
+#define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
+#define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
+#define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
+
+#define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
+#define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
+#define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
+#define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
+#define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
+#define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
+#define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
+#define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
+
+#define CICR0_SIM_MP (0 << 24)
+#define CICR0_SIM_SP (1 << 24)
+#define CICR0_SIM_MS (2 << 24)
+#define CICR0_SIM_EP (3 << 24)
+#define CICR0_SIM_ES (4 << 24)
+
+#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
+#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
+#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
+#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
+#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
+
+#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
+#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
+#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
+#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
+#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
+
+#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
+#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
+#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
+#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
+
+#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
+ CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
+ CICR0_EOFM | CICR0_FOM)
+
+#define sensor_call(cam, o, f, args...) \
+ v4l2_subdev_call(cam->sensor, o, f, ##args)
+
+/*
+ * Format handling
+ */
+/**
+ * struct soc_camera_format_xlate - match between host and sensor formats
+ * @code: code of a sensor provided format
+ * @host_fmt: host format after host translation from code
+ *
+ * Host and sensor translation structure. Used in table of host and sensor
+ * formats matchings in soc_camera_device. A host can override the generic list
+ * generation by implementing get_formats(), and use it for format checks and
+ * format setup.
+ */
+struct soc_camera_format_xlate {
+ u32 code;
+ const struct soc_mbus_pixelfmt *host_fmt;
+};
+
+/*
+ * Structures
+ */
+enum pxa_camera_active_dma {
+ DMA_Y = 0x1,
+ DMA_U = 0x2,
+ DMA_V = 0x4,
+};
+
+/* buffer for one video frame */
+struct pxa_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct vb2_v4l2_buffer vbuf;
+ struct list_head queue;
+ u32 code;
+ int nb_planes;
+ /* our descriptor lists for Y, U and V channels */
+ struct dma_async_tx_descriptor *descs[3];
+ dma_cookie_t cookie[3];
+ struct scatterlist *sg[3];
+ int sg_len[3];
+ size_t plane_sizes[3];
+ int inwork;
+ enum pxa_camera_active_dma active_dma;
+};
+
+struct pxa_camera_dev {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct v4l2_async_notifier notifier;
+ struct vb2_queue vb2_vq;
+ struct v4l2_subdev *sensor;
+ struct soc_camera_format_xlate *user_formats;
+ const struct soc_camera_format_xlate *current_fmt;
+ struct v4l2_pix_format current_pix;
+
+ struct v4l2_async_subdev asd;
+ struct v4l2_async_subdev *asds[1];
+
+ /*
+ * PXA27x is only supposed to handle one camera on its Quick Capture
+ * interface. If anyone ever builds hardware to enable more than
+ * one camera, they will have to modify this driver too
+ */
+ struct clk *clk;
+
+ unsigned int irq;
+ void __iomem *base;
+
+ int channels;
+ struct dma_chan *dma_chans[3];
+
+ struct pxacamera_platform_data *pdata;
+ struct resource *res;
+ unsigned long platform_flags;
+ unsigned long ciclk;
+ unsigned long mclk;
+ u32 mclk_divisor;
+ struct v4l2_clk *mclk_clk;
+ u16 width_flags; /* max 10 bits */
+
+ struct list_head capture;
+
+ spinlock_t lock;
+ struct mutex mlock;
+ unsigned int buf_sequence;
+
+ struct pxa_buffer *active;
+ struct tasklet_struct task_eof;
+
+ u32 save_cicr[5];
+};
+
+struct pxa_cam {
+ unsigned long flags;
+};
+
+static const char *pxa_cam_driver_description = "PXA_Camera";
+
+/*
+ * Format translation functions
+ */
+const struct soc_camera_format_xlate *soc_mbus_xlate_by_fourcc(
+ struct soc_camera_format_xlate *user_formats, unsigned int fourcc)
+{
+ unsigned int i;
+
+ for (i = 0; user_formats[i].code; i++)
+ if (user_formats[i].host_fmt->fourcc == fourcc)
+ return user_formats + i;
+ return NULL;
+}
+
+static struct soc_camera_format_xlate *soc_mbus_build_fmts_xlate(
+ struct v4l2_device *v4l2_dev, struct v4l2_subdev *subdev,
+ int (*get_formats)(struct v4l2_device *, unsigned int,
+ struct soc_camera_format_xlate *xlate))
+{
+ unsigned int i, fmts = 0, raw_fmts = 0;
+ int ret;
+ struct v4l2_subdev_mbus_code_enum code = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ struct soc_camera_format_xlate *user_formats;
+
+ while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
+ raw_fmts++;
+ code.index++;
+ }
+
+ /*
+ * First pass - only count formats this host-sensor
+ * configuration can provide
+ */
+ for (i = 0; i < raw_fmts; i++) {
+ ret = get_formats(v4l2_dev, i, NULL);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ fmts += ret;
+ }
+
+ if (!fmts)
+ return ERR_PTR(-ENXIO);
+
+ user_formats = kcalloc(fmts + 1, sizeof(*user_formats), GFP_KERNEL);
+ if (!user_formats)
+ return ERR_PTR(-ENOMEM);
+
+ /* Second pass - actually fill data formats */
+ fmts = 0;
+ for (i = 0; i < raw_fmts; i++) {
+ ret = get_formats(v4l2_dev, i, user_formats + fmts);
+ if (ret < 0)
+ goto egfmt;
+ fmts += ret;
+ }
+ user_formats[fmts].code = 0;
+
+ return user_formats;
+egfmt:
+ kfree(user_formats);
+ return ERR_PTR(ret);
+}
+
+/*
+ * Videobuf operations
+ */
+static struct pxa_buffer *vb2_to_pxa_buffer(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ return container_of(vbuf, struct pxa_buffer, vbuf);
+}
+
+static struct device *pcdev_to_dev(struct pxa_camera_dev *pcdev)
+{
+ return pcdev->v4l2_dev.dev;
+}
+
+static struct pxa_camera_dev *v4l2_dev_to_pcdev(struct v4l2_device *v4l2_dev)
+{
+ return container_of(v4l2_dev, struct pxa_camera_dev, v4l2_dev);
+}
+
+static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
+ enum pxa_camera_active_dma act_dma);
+
+static void pxa_camera_dma_irq_y(void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+
+ pxa_camera_dma_irq(pcdev, DMA_Y);
+}
+
+static void pxa_camera_dma_irq_u(void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+
+ pxa_camera_dma_irq(pcdev, DMA_U);
+}
+
+static void pxa_camera_dma_irq_v(void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+
+ pxa_camera_dma_irq(pcdev, DMA_V);
+}
+
+/**
+ * pxa_init_dma_channel - init dma descriptors
+ * @pcdev: pxa camera device
+ * @vb: videobuffer2 buffer
+ * @dma: dma video buffer
+ * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
+ * @cibr: camera Receive Buffer Register
+ *
+ * Prepares the pxa dma descriptors to transfer one camera channel.
+ *
+ * Returns 0 if success or -ENOMEM if no memory is available
+ */
+static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf, int channel,
+ struct scatterlist *sg, int sglen)
+{
+ struct dma_chan *dma_chan = pcdev->dma_chans[channel];
+ struct dma_async_tx_descriptor *tx;
+
+ tx = dmaengine_prep_slave_sg(dma_chan, sg, sglen, DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_REUSE);
+ if (!tx) {
+ dev_err(pcdev_to_dev(pcdev),
+ "dmaengine_prep_slave_sg failed\n");
+ goto fail;
+ }
+
+ tx->callback_param = pcdev;
+ switch (channel) {
+ case 0:
+ tx->callback = pxa_camera_dma_irq_y;
+ break;
+ case 1:
+ tx->callback = pxa_camera_dma_irq_u;
+ break;
+ case 2:
+ tx->callback = pxa_camera_dma_irq_v;
+ break;
+ }
+
+ buf->descs[channel] = tx;
+ return 0;
+fail:
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s (vb=%p) dma_tx=%p\n",
+ __func__, buf, tx);
+
+ return -ENOMEM;
+}
+
+static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ buf->active_dma = DMA_Y;
+ if (buf->nb_planes == 3)
+ buf->active_dma |= DMA_U | DMA_V;
+}
+
+/**
+ * pxa_dma_start_channels - start DMA channel for active buffer
+ * @pcdev: pxa camera device
+ *
+ * Initialize DMA channels to the beginning of the active video buffer, and
+ * start these channels.
+ */
+static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev)
+{
+ int i;
+ struct pxa_buffer *active;
+
+ active = pcdev->active;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s (channel=%d)\n", __func__, i);
+ dma_async_issue_pending(pcdev->dma_chans[i]);
+ }
+}
+
+static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev)
+{
+ int i;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s (channel=%d)\n", __func__, i);
+ dmaengine_terminate_all(pcdev->dma_chans[i]);
+ }
+}
+
+static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ int i;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ buf->cookie[i] = dmaengine_submit(buf->descs[i]);
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s (channel=%d) : submit vb=%p cookie=%d\n",
+ __func__, i, buf, buf->descs[i]->cookie);
+ }
+}
+
+/**
+ * pxa_camera_start_capture - start video capturing
+ * @pcdev: camera device
+ *
+ * Launch capturing. DMA channels should not be active yet. They should get
+ * activated at the end of frame interrupt, to capture only whole frames, and
+ * never begin the capture of a partial frame.
+ */
+static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0;
+
+ dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
+ __raw_writel(__raw_readl(pcdev->base + CISR), pcdev->base + CISR);
+ /* Enable End-Of-Frame Interrupt */
+ cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
+ cicr0 &= ~CICR0_EOFM;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0;
+
+ pxa_dma_stop_channels(pcdev);
+
+ cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+
+ pcdev->active = NULL;
+ dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
+}
+
+static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf,
+ enum vb2_buffer_state state)
+{
+ struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
+ list_del_init(&buf->queue);
+ vb->timestamp = ktime_get_ns();
+ vbuf->sequence = pcdev->buf_sequence++;
+ vbuf->field = V4L2_FIELD_NONE;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ dev_dbg(pcdev_to_dev(pcdev), "%s dequeud buffer (buf=0x%p)\n",
+ __func__, buf);
+
+ if (list_empty(&pcdev->capture)) {
+ pxa_camera_stop_capture(pcdev);
+ return;
+ }
+
+ pcdev->active = list_entry(pcdev->capture.next,
+ struct pxa_buffer, queue);
+}
+
+/**
+ * pxa_camera_check_link_miss - check missed DMA linking
+ * @pcdev: camera device
+ *
+ * The DMA chaining is done with DMA running. This means a tiny temporal window
+ * remains, where a buffer is queued on the chain, while the chain is already
+ * stopped. This means the tailed buffer would never be transferred by DMA.
+ * This function restarts the capture for this corner case, where :
+ * - DADR() == DADDR_STOP
+ * - a videobuffer is queued on the pcdev->capture list
+ *
+ * Please check the "DMA hot chaining timeslice issue" in
+ * Documentation/video4linux/pxa_camera.txt
+ *
+ * Context: should only be called within the dma irq handler
+ */
+static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev,
+ dma_cookie_t last_submitted,
+ dma_cookie_t last_issued)
+{
+ bool is_dma_stopped = last_submitted != last_issued;
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s : top queued buffer=%p, is_dma_stopped=%d\n",
+ __func__, pcdev->active, is_dma_stopped);
+
+ if (pcdev->active && is_dma_stopped)
+ pxa_camera_start_capture(pcdev);
+}
+
+static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
+ enum pxa_camera_active_dma act_dma)
+{
+ struct pxa_buffer *buf, *last_buf;
+ unsigned long flags;
+ u32 camera_status, overrun;
+ int chan;
+ enum dma_status last_status;
+ dma_cookie_t last_issued;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ camera_status = __raw_readl(pcdev->base + CISR);
+ dev_dbg(pcdev_to_dev(pcdev), "camera dma irq, cisr=0x%x dma=%d\n",
+ camera_status, act_dma);
+ overrun = CISR_IFO_0;
+ if (pcdev->channels == 3)
+ overrun |= CISR_IFO_1 | CISR_IFO_2;
+
+ /*
+ * pcdev->active should not be NULL in DMA irq handler.
+ *
+ * But there is one corner case : if capture was stopped due to an
+ * overrun of channel 1, and at that same channel 2 was completed.
+ *
+ * When handling the overrun in DMA irq for channel 1, we'll stop the
+ * capture and restart it (and thus set pcdev->active to NULL). But the
+ * DMA irq handler will already be pending for channel 2. So on entering
+ * the DMA irq handler for channel 2 there will be no active buffer, yet
+ * that is normal.
+ */
+ if (!pcdev->active)
+ goto out;
+
+ buf = pcdev->active;
+ WARN_ON(buf->inwork || list_empty(&buf->queue));
+
+ /*
+ * It's normal if the last frame creates an overrun, as there
+ * are no more DMA descriptors to fetch from QCI fifos
+ */
+ switch (act_dma) {
+ case DMA_U:
+ chan = 1;
+ break;
+ case DMA_V:
+ chan = 2;
+ break;
+ default:
+ chan = 0;
+ break;
+ }
+ last_buf = list_entry(pcdev->capture.prev,
+ struct pxa_buffer, queue);
+ last_status = dma_async_is_tx_complete(pcdev->dma_chans[chan],
+ last_buf->cookie[chan],
+ NULL, &last_issued);
+ if (camera_status & overrun &&
+ last_status != DMA_COMPLETE) {
+ dev_dbg(pcdev_to_dev(pcdev), "FIFO overrun! CISR: %x\n",
+ camera_status);
+ pxa_camera_stop_capture(pcdev);
+ list_for_each_entry(buf, &pcdev->capture, queue)
+ pxa_dma_add_tail_buf(pcdev, buf);
+ pxa_camera_start_capture(pcdev);
+ goto out;
+ }
+ buf->active_dma &= ~act_dma;
+ if (!buf->active_dma) {
+ pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_DONE);
+ pxa_camera_check_link_miss(pcdev, last_buf->cookie[chan],
+ last_issued);
+ }
+
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static u32 mclk_get_divisor(struct platform_device *pdev,
+ struct pxa_camera_dev *pcdev)
+{
+ unsigned long mclk = pcdev->mclk;
+ u32 div;
+ unsigned long lcdclk;
+
+ lcdclk = clk_get_rate(pcdev->clk);
+ pcdev->ciclk = lcdclk;
+
+ /* mclk <= ciclk / 4 (27.4.2) */
+ if (mclk > lcdclk / 4) {
+ mclk = lcdclk / 4;
+ dev_warn(pcdev_to_dev(pcdev),
+ "Limiting master clock to %lu\n", mclk);
+ }
+
+ /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
+ div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
+
+ /* If we're not supplying MCLK, leave it at 0 */
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ pcdev->mclk = lcdclk / (2 * (div + 1));
+
+ dev_dbg(pcdev_to_dev(pcdev), "LCD clock %luHz, target freq %luHz, divisor %u\n",
+ lcdclk, mclk, div);
+
+ return div;
+}
+
+static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
+ unsigned long pclk)
+{
+ /* We want a timeout > 1 pixel time, not ">=" */
+ u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
+
+ __raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
+}
+
+static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
+{
+ u32 cicr4 = 0;
+
+ /* disable all interrupts */
+ __raw_writel(0x3ff, pcdev->base + CICR0);
+
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ cicr4 |= CICR4_PCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ cicr4 |= CICR4_MCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ cicr4 |= CICR4_PCP;
+ if (pcdev->platform_flags & PXA_CAMERA_HSP)
+ cicr4 |= CICR4_HSP;
+ if (pcdev->platform_flags & PXA_CAMERA_VSP)
+ cicr4 |= CICR4_VSP;
+
+ __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
+
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ /* Initialise the timeout under the assumption pclk = mclk */
+ recalculate_fifo_timeout(pcdev, pcdev->mclk);
+ else
+ /* "Safe default" - 13MHz */
+ recalculate_fifo_timeout(pcdev, 13000000);
+
+ clk_prepare_enable(pcdev->clk);
+}
+
+static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
+{
+ clk_disable_unprepare(pcdev->clk);
+}
+
+static void pxa_camera_eof(unsigned long arg)
+{
+ struct pxa_camera_dev *pcdev = (struct pxa_camera_dev *)arg;
+ unsigned long cifr;
+ struct pxa_buffer *buf;
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "Camera interrupt status 0x%x\n",
+ __raw_readl(pcdev->base + CISR));
+
+ /* Reset the FIFOs */
+ cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
+ __raw_writel(cifr, pcdev->base + CIFR);
+
+ pcdev->active = list_first_entry(&pcdev->capture,
+ struct pxa_buffer, queue);
+ buf = pcdev->active;
+ pxa_videobuf_set_actdma(pcdev, buf);
+
+ pxa_dma_start_channels(pcdev);
+}
+
+static irqreturn_t pxa_camera_irq(int irq, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ unsigned long status, cicr0;
+
+ status = __raw_readl(pcdev->base + CISR);
+ dev_dbg(pcdev_to_dev(pcdev),
+ "Camera interrupt status 0x%lx\n", status);
+
+ if (!status)
+ return IRQ_NONE;
+
+ __raw_writel(status, pcdev->base + CISR);
+
+ if (status & CISR_EOF) {
+ cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+ tasklet_schedule(&pcdev->task_eof);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int test_platform_param(struct pxa_camera_dev *pcdev,
+ unsigned char buswidth, unsigned long *flags)
+{
+ /*
+ * Platform specified synchronization and pixel clock polarities are
+ * only a recommendation and are only used during probing. The PXA270
+ * quick capture interface supports both.
+ */
+ *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
+ V4L2_MBUS_MASTER : V4L2_MBUS_SLAVE) |
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_HSYNC_ACTIVE_LOW |
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_VSYNC_ACTIVE_LOW |
+ V4L2_MBUS_DATA_ACTIVE_HIGH |
+ V4L2_MBUS_PCLK_SAMPLE_RISING |
+ V4L2_MBUS_PCLK_SAMPLE_FALLING;
+
+ /* If requested data width is supported by the platform, use it */
+ if ((1 << (buswidth - 1)) & pcdev->width_flags)
+ return 0;
+
+ return -EINVAL;
+}
+
+static void pxa_camera_setup_cicr(struct pxa_camera_dev *pcdev,
+ unsigned long flags, __u32 pixfmt)
+{
+ unsigned long dw, bpp;
+ u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0, y_skip_top;
+ int ret = sensor_call(pcdev, sensor, g_skip_top_lines, &y_skip_top);
+
+ if (ret < 0)
+ y_skip_top = 0;
+
+ /*
+ * Datawidth is now guaranteed to be equal to one of the three values.
+ * We fix bit-per-pixel equal to data-width...
+ */
+ switch (pcdev->current_fmt->host_fmt->bits_per_sample) {
+ case 10:
+ dw = 4;
+ bpp = 0x40;
+ break;
+ case 9:
+ dw = 3;
+ bpp = 0x20;
+ break;
+ default:
+ /*
+ * Actually it can only be 8 now,
+ * default is just to silence compiler warnings
+ */
+ case 8:
+ dw = 2;
+ bpp = 0;
+ }
+
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ cicr4 |= CICR4_PCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ cicr4 |= CICR4_MCLK_EN;
+ if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ cicr4 |= CICR4_PCP;
+ if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ cicr4 |= CICR4_HSP;
+ if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ cicr4 |= CICR4_VSP;
+
+ cicr0 = __raw_readl(pcdev->base + CICR0);
+ if (cicr0 & CICR0_ENB)
+ __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
+
+ cicr1 = CICR1_PPL_VAL(pcdev->current_pix.width - 1) | bpp | dw;
+
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_YUV422P:
+ pcdev->channels = 3;
+ cicr1 |= CICR1_YCBCR_F;
+ /*
+ * Normally, pxa bus wants as input UYVY format. We allow all
+ * reorderings of the YUV422 format, as no processing is done,
+ * and the YUV stream is just passed through without any
+ * transformation. Note that UYVY is the only format that
+ * should be used if pxa framebuffer Overlay2 is used.
+ */
+ case V4L2_PIX_FMT_UYVY:
+ case V4L2_PIX_FMT_VYUY:
+ case V4L2_PIX_FMT_YUYV:
+ case V4L2_PIX_FMT_YVYU:
+ cicr1 |= CICR1_COLOR_SP_VAL(2);
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
+ CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
+ break;
+ }
+
+ cicr2 = 0;
+ cicr3 = CICR3_LPF_VAL(pcdev->current_pix.height - 1) |
+ CICR3_BFW_VAL(min((u32)255, y_skip_top));
+ cicr4 |= pcdev->mclk_divisor;
+
+ __raw_writel(cicr1, pcdev->base + CICR1);
+ __raw_writel(cicr2, pcdev->base + CICR2);
+ __raw_writel(cicr3, pcdev->base + CICR3);
+ __raw_writel(cicr4, pcdev->base + CICR4);
+
+ /* CIF interrupts are not used, only DMA */
+ cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ?
+ CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
+ cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+/*
+ * Videobuf2 section
+ */
+static void pxa_buffer_cleanup(struct pxa_buffer *buf)
+{
+ int i;
+
+ for (i = 0; i < 3 && buf->descs[i]; i++) {
+ dmaengine_desc_free(buf->descs[i]);
+ kfree(buf->sg[i]);
+ buf->descs[i] = NULL;
+ buf->sg[i] = NULL;
+ buf->sg_len[i] = 0;
+ buf->plane_sizes[i] = 0;
+ }
+ buf->nb_planes = 0;
+}
+
+static int pxa_buffer_init(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
+ struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
+ int nb_channels = pcdev->channels;
+ int i, ret = 0;
+ unsigned long size = vb2_plane_size(vb, 0);
+
+ switch (nb_channels) {
+ case 1:
+ buf->plane_sizes[0] = size;
+ break;
+ case 3:
+ buf->plane_sizes[0] = size / 2;
+ buf->plane_sizes[1] = size / 4;
+ buf->plane_sizes[2] = size / 4;
+ break;
+ default:
+ return -EINVAL;
+ };
+ buf->nb_planes = nb_channels;
+
+ ret = sg_split(sgt->sgl, sgt->nents, 0, nb_channels,
+ buf->plane_sizes, buf->sg, buf->sg_len, GFP_KERNEL);
+ if (ret < 0) {
+ dev_err(pcdev_to_dev(pcdev),
+ "sg_split failed: %d\n", ret);
+ return ret;
+ }
+ for (i = 0; i < nb_channels; i++) {
+ ret = pxa_init_dma_channel(pcdev, buf, i,
+ buf->sg[i], buf->sg_len[i]);
+ if (ret) {
+ pxa_buffer_cleanup(buf);
+ return ret;
+ }
+ }
+ INIT_LIST_HEAD(&buf->queue);
+
+ return ret;
+}
+
+static void pxac_vb2_cleanup(struct vb2_buffer *vb)
+{
+ struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s(vb=%p)\n", __func__, vb);
+ pxa_buffer_cleanup(buf);
+}
+
+static void pxac_vb2_queue(struct vb2_buffer *vb)
+{
+ struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s(vb=%p) nb_channels=%d size=%lu active=%p\n",
+ __func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0),
+ pcdev->active);
+
+ list_add_tail(&buf->queue, &pcdev->capture);
+
+ pxa_dma_add_tail_buf(pcdev, buf);
+}
+
+/*
+ * Please check the DMA prepared buffer structure in :
+ * Documentation/video4linux/pxa_camera.txt
+ * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
+ * modification while DMA chain is running will work anyway.
+ */
+static int pxac_vb2_prepare(struct vb2_buffer *vb)
+{
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
+ struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
+ int ret = 0;
+
+ switch (pcdev->channels) {
+ case 1:
+ case 3:
+ vb2_set_plane_payload(vb, 0, pcdev->current_pix.sizeimage);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s (vb=%p) nb_channels=%d size=%lu\n",
+ __func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0));
+
+ WARN_ON(!pcdev->current_fmt);
+
+#ifdef DEBUG
+ /*
+ * This can be useful if you want to see if we actually fill
+ * the buffer with something
+ */
+ for (i = 0; i < vb->num_planes; i++)
+ memset((void *)vb2_plane_vaddr(vb, i),
+ 0xaa, vb2_get_plane_payload(vb, i));
+#endif
+
+ /*
+ * I think, in buf_prepare you only have to protect global data,
+ * the actual buffer is yours
+ */
+ buf->inwork = 0;
+ pxa_videobuf_set_actdma(pcdev, buf);
+
+ return ret;
+}
+
+static int pxac_vb2_init(struct vb2_buffer *vb)
+{
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
+ struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s(nb_channels=%d)\n",
+ __func__, pcdev->channels);
+
+ return pxa_buffer_init(pcdev, buf);
+}
+
+static int pxac_vb2_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbufs,
+ unsigned int *num_planes, unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
+ int size = pcdev->current_pix.sizeimage;
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "%s(vq=%p nbufs=%d num_planes=%d size=%d)\n",
+ __func__, vq, *nbufs, *num_planes, size);
+ /*
+ * Called from VIDIOC_REQBUFS or in compatibility mode For YUV422P
+ * format, even if there are 3 planes Y, U and V, we reply there is only
+ * one plane, containing Y, U and V data, one after the other.
+ */
+ if (*num_planes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ *num_planes = 1;
+ switch (pcdev->channels) {
+ case 1:
+ case 3:
+ sizes[0] = size;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (!*nbufs)
+ *nbufs = 1;
+
+ return 0;
+}
+
+static int pxac_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
+
+ dev_dbg(pcdev_to_dev(pcdev), "%s(count=%d) active=%p\n",
+ __func__, count, pcdev->active);
+
+ pcdev->buf_sequence = 0;
+ if (!pcdev->active)
+ pxa_camera_start_capture(pcdev);
+
+ return 0;
+}
+
+static void pxac_vb2_stop_streaming(struct vb2_queue *vq)
+{
+ struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
+ struct pxa_buffer *buf, *tmp;
+
+ dev_dbg(pcdev_to_dev(pcdev), "%s active=%p\n",
+ __func__, pcdev->active);
+ pxa_camera_stop_capture(pcdev);
+
+ list_for_each_entry_safe(buf, tmp, &pcdev->capture, queue)
+ pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_ERROR);
+}
+
+static struct vb2_ops pxac_vb2_ops = {
+ .queue_setup = pxac_vb2_queue_setup,
+ .buf_init = pxac_vb2_init,
+ .buf_prepare = pxac_vb2_prepare,
+ .buf_queue = pxac_vb2_queue,
+ .buf_cleanup = pxac_vb2_cleanup,
+ .start_streaming = pxac_vb2_start_streaming,
+ .stop_streaming = pxac_vb2_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int pxa_camera_init_videobuf2(struct pxa_camera_dev *pcdev)
+{
+ int ret;
+ struct vb2_queue *vq = &pcdev->vb2_vq;
+
+ memset(vq, 0, sizeof(*vq));
+ vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
+ vq->drv_priv = pcdev;
+ vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vq->buf_struct_size = sizeof(struct pxa_buffer);
+ vq->dev = pcdev->v4l2_dev.dev;
+
+ vq->ops = &pxac_vb2_ops;
+ vq->mem_ops = &vb2_dma_sg_memops;
+ vq->lock = &pcdev->mlock;
+
+ ret = vb2_queue_init(vq);
+ dev_dbg(pcdev_to_dev(pcdev),
+ "vb2_queue_init(vq=%p): %d\n", vq, ret);
+
+ return ret;
+}
+
+/*
+ * Video ioctls section
+ */
+static int pxa_camera_set_bus_param(struct pxa_camera_dev *pcdev)
+{
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ u32 pixfmt = pcdev->current_fmt->host_fmt->fourcc;
+ unsigned long bus_flags, common_flags;
+ int ret;
+
+ ret = test_platform_param(pcdev,
+ pcdev->current_fmt->host_fmt->bits_per_sample,
+ &bus_flags);
+ if (ret < 0)
+ return ret;
+
+ ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(pcdev_to_dev(pcdev),
+ "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;
+ }
+
+ pcdev->channels = 1;
+
+ /* Make choises, based on platform preferences */
+ if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & PXA_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 (pcdev->platform_flags & PXA_CAMERA_VSP)
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
+ (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
+ else
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ }
+
+ cfg.flags = common_flags;
+ ret = sensor_call(pcdev, video, s_mbus_config, &cfg);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ dev_dbg(pcdev_to_dev(pcdev),
+ "camera s_mbus_config(0x%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ pxa_camera_setup_cicr(pcdev, common_flags, pixfmt);
+
+ return 0;
+}
+
+static int pxa_camera_try_bus_param(struct pxa_camera_dev *pcdev,
+ unsigned char buswidth)
+{
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ unsigned long bus_flags, common_flags;
+ int ret = test_platform_param(pcdev, buswidth, &bus_flags);
+
+ if (ret < 0)
+ return ret;
+
+ ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(pcdev_to_dev(pcdev),
+ "Flags incompatible: camera 0x%x, host 0x%lx\n",
+ cfg.flags, bus_flags);
+ return -EINVAL;
+ }
+ } else if (ret == -ENOIOCTLCMD) {
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static const struct soc_mbus_pixelfmt pxa_camera_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUV422P,
+ .name = "Planar YUV422 16 bit",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_U_V,
+ },
+};
+
+/* This will be corrected as we get more formats */
+static bool pxa_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 pxa_camera_get_formats(struct v4l2_device *v4l2_dev,
+ unsigned int idx,
+ struct soc_camera_format_xlate *xlate)
+{
+ struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
+ 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 = sensor_call(pcdev, pad, enum_mbus_code, NULL, &code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code.code);
+ if (!fmt) {
+ dev_err(pcdev_to_dev(pcdev),
+ "Invalid format code #%u: %d\n", idx, code.code);
+ return 0;
+ }
+
+ /* This also checks support for the requested bits-per-sample */
+ ret = pxa_camera_try_bus_param(pcdev, fmt->bits_per_sample);
+ if (ret < 0)
+ return 0;
+
+ switch (code.code) {
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &pxa_camera_formats[0];
+ xlate->code = code.code;
+ xlate++;
+ dev_dbg(pcdev_to_dev(pcdev),
+ "Providing format %s using code %d\n",
+ pxa_camera_formats[0].name, code.code);
+ }
+ case MEDIA_BUS_FMT_VYUY8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_YVYU8_2X8:
+ case MEDIA_BUS_FMT_RGB565_2X8_LE:
+ case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
+ if (xlate)
+ dev_dbg(pcdev_to_dev(pcdev),
+ "Providing format %s packed\n",
+ fmt->name);
+ break;
+ default:
+ if (!pxa_camera_packing_supported(fmt))
+ return 0;
+ if (xlate)
+ dev_dbg(pcdev_to_dev(pcdev),
+ "Providing format %s in pass-through mode\n",
+ fmt->name);
+ }
+
+ /* Generic pass-through */
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code.code;
+ xlate++;
+ }
+
+ return formats;
+}
+
+static int pxa_camera_build_formats(struct pxa_camera_dev *pcdev)
+{
+ struct soc_camera_format_xlate *xlate;
+
+ xlate = soc_mbus_build_fmts_xlate(&pcdev->v4l2_dev, pcdev->sensor,
+ pxa_camera_get_formats);
+ if (IS_ERR(xlate))
+ return PTR_ERR(xlate);
+
+ pcdev->user_formats = xlate;
+ return 0;
+}
+
+static void pxa_camera_destroy_formats(struct pxa_camera_dev *pcdev)
+{
+ kfree(pcdev->user_formats);
+}
+
+static int pxa_camera_check_frame(u32 width, u32 height)
+{
+ /* limit to pxa hardware capabilities */
+ return height < 32 || height > 2048 || width < 48 || width > 2048 ||
+ (width & 0x01);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int pxac_vidioc_g_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+ if (reg->reg > CIBR2)
+ return -ERANGE;
+
+ reg->val = __raw_readl(pcdev->base + reg->reg);
+ reg->size = sizeof(__u32);
+ return 0;
+}
+
+static int pxac_vidioc_s_register(struct file *file, void *priv,
+ const struct v4l2_dbg_register *reg)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(file);
+
+ if (reg->reg > CIBR2)
+ return -ERANGE;
+ if (reg->size != sizeof(__u32))
+ return -EINVAL;
+ __raw_writel(reg->val, pcdev->base + reg->reg);
+ return 0;
+}
+#endif
+
+static int pxac_vidioc_enum_fmt_vid_cap(struct file *filp, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ const struct soc_mbus_pixelfmt *format;
+ unsigned int idx;
+
+ for (idx = 0; pcdev->user_formats[idx].code; idx++);
+ if (f->index >= idx)
+ return -EINVAL;
+
+ format = pcdev->user_formats[f->index].host_fmt;
+ f->pixelformat = format->fourcc;
+ return 0;
+}
+
+static int pxac_vidioc_g_fmt_vid_cap(struct file *filp, void *priv,
+ struct v4l2_format *f)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ pix->width = pcdev->current_pix.width;
+ pix->height = pcdev->current_pix.height;
+ pix->bytesperline = pcdev->current_pix.bytesperline;
+ pix->sizeimage = pcdev->current_pix.sizeimage;
+ pix->field = pcdev->current_pix.field;
+ pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
+ pix->colorspace = pcdev->current_pix.colorspace;
+ dev_dbg(pcdev_to_dev(pcdev), "current_fmt->fourcc: 0x%08x\n",
+ pcdev->current_fmt->host_fmt->fourcc);
+ return 0;
+}
+
+static int pxac_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
+ struct v4l2_format *f)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ 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_mbus_xlate_by_fourcc(pcdev->user_formats, pixfmt);
+ if (!xlate) {
+ dev_warn(pcdev_to_dev(pcdev), "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ /*
+ * Limit to pxa hardware capabilities. YUV422P planar format requires
+ * images size to be a multiple of 16 bytes. If not, zeros will be
+ * inserted between Y and U planes, and U and V planes, which violates
+ * the YUV422P standard.
+ */
+ v4l_bound_align_image(&pix->width, 48, 2048, 1,
+ &pix->height, 32, 2048, 0,
+ pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0);
+
+ v4l2_fill_mbus_format(mf, pix, xlate->code);
+ ret = sensor_call(pcdev, pad, set_fmt, &pad_cfg, &format);
+ if (ret < 0)
+ return ret;
+
+ v4l2_fill_pix_format(pix, mf);
+
+ /* Only progressive video supported so far */
+ switch (mf->field) {
+ case V4L2_FIELD_ANY:
+ case V4L2_FIELD_NONE:
+ pix->field = V4L2_FIELD_NONE;
+ break;
+ default:
+ /* TODO: support interlaced at least in pass-through mode */
+ dev_err(pcdev_to_dev(pcdev), "Field type %d unsupported.\n",
+ mf->field);
+ return -EINVAL;
+ }
+
+ ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
+ if (ret < 0)
+ return ret;
+
+ pix->bytesperline = ret;
+ ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
+ pix->height);
+ if (ret < 0)
+ return ret;
+
+ pix->sizeimage = ret;
+ return 0;
+}
+
+static int pxac_vidioc_s_fmt_vid_cap(struct file *filp, void *priv,
+ struct v4l2_format *f)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ 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,
+ };
+ unsigned long flags;
+ int ret, is_busy;
+
+ dev_dbg(pcdev_to_dev(pcdev),
+ "s_fmt_vid_cap(pix=%dx%d:%x)\n",
+ pix->width, pix->height, pix->pixelformat);
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+ is_busy = pcdev->active || vb2_is_busy(&pcdev->vb2_vq);
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+
+ if (is_busy)
+ return -EBUSY;
+
+ ret = pxac_vidioc_try_fmt_vid_cap(filp, priv, f);
+ if (ret)
+ return ret;
+
+ xlate = soc_mbus_xlate_by_fourcc(pcdev->user_formats,
+ pix->pixelformat);
+ v4l2_fill_mbus_format(&format.format, pix, xlate->code);
+ ret = sensor_call(pcdev, pad, set_fmt, NULL, &format);
+ if (ret < 0) {
+ dev_warn(pcdev_to_dev(pcdev),
+ "Failed to configure for format %x\n",
+ pix->pixelformat);
+ } else if (pxa_camera_check_frame(pix->width, pix->height)) {
+ dev_warn(pcdev_to_dev(pcdev),
+ "Camera driver produced an unsupported frame %dx%d\n",
+ pix->width, pix->height);
+ return -EINVAL;
+ }
+
+ pcdev->current_fmt = xlate;
+ pcdev->current_pix = *pix;
+
+ ret = pxa_camera_set_bus_param(pcdev);
+ return ret;
+}
+
+static int pxac_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strlcpy(cap->bus_info, "platform:pxa-camera", sizeof(cap->bus_info));
+ strlcpy(cap->driver, PXA_CAM_DRV_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, pxa_cam_driver_description, 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 pxac_vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *i)
+{
+ if (i->index > 0)
+ return -EINVAL;
+
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+ strlcpy(i->name, "Camera", sizeof(i->name));
+
+ return 0;
+}
+
+static int pxac_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int pxac_vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+ if (i > 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int pxac_fops_camera_open(struct file *filp)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ int ret;
+
+ mutex_lock(&pcdev->mlock);
+ ret = v4l2_fh_open(filp);
+ if (ret < 0)
+ goto out;
+
+ ret = sensor_call(pcdev, core, s_power, 1);
+ if (ret)
+ v4l2_fh_release(filp);
+out:
+ mutex_unlock(&pcdev->mlock);
+ return ret;
+}
+
+static int pxac_fops_camera_release(struct file *filp)
+{
+ struct pxa_camera_dev *pcdev = video_drvdata(filp);
+ int ret;
+
+ ret = vb2_fop_release(filp);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&pcdev->mlock);
+ ret = sensor_call(pcdev, core, s_power, 0);
+ mutex_unlock(&pcdev->mlock);
+
+ return ret;
+}
+
+static const struct v4l2_file_operations pxa_camera_fops = {
+ .owner = THIS_MODULE,
+ .open = pxac_fops_camera_open,
+ .release = pxac_fops_camera_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops = {
+ .vidioc_querycap = pxac_vidioc_querycap,
+
+ .vidioc_enum_input = pxac_vidioc_enum_input,
+ .vidioc_g_input = pxac_vidioc_g_input,
+ .vidioc_s_input = pxac_vidioc_s_input,
+
+ .vidioc_enum_fmt_vid_cap = pxac_vidioc_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = pxac_vidioc_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = pxac_vidioc_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = pxac_vidioc_try_fmt_vid_cap,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_register = pxac_vidioc_g_register,
+ .vidioc_s_register = pxac_vidioc_s_register,
+#endif
+};
+
+static struct v4l2_clk_ops pxa_camera_mclk_ops = {
+};
+
+static const struct video_device pxa_camera_videodev_template = {
+ .name = "pxa-camera",
+ .minor = -1,
+ .fops = &pxa_camera_fops,
+ .ioctl_ops = &pxa_camera_ioctl_ops,
+ .release = video_device_release_empty,
+ .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING,
+};
+
+static int pxa_camera_sensor_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ int err;
+ struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
+ struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
+ struct video_device *vdev = &pcdev->vdev;
+ struct v4l2_pix_format *pix = &pcdev->current_pix;
+ struct v4l2_subdev_format format = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ struct v4l2_mbus_framefmt *mf = &format.format;
+
+ dev_info(pcdev_to_dev(pcdev), "%s(): trying to bind a device\n",
+ __func__);
+ mutex_lock(&pcdev->mlock);
+ *vdev = pxa_camera_videodev_template;
+ vdev->v4l2_dev = v4l2_dev;
+ vdev->lock = &pcdev->mlock;
+ pcdev->sensor = subdev;
+ pcdev->vdev.queue = &pcdev->vb2_vq;
+ pcdev->vdev.v4l2_dev = &pcdev->v4l2_dev;
+ pcdev->vdev.ctrl_handler = subdev->ctrl_handler;
+ video_set_drvdata(&pcdev->vdev, pcdev);
+
+ err = pxa_camera_build_formats(pcdev);
+ if (err) {
+ dev_err(pcdev_to_dev(pcdev), "building formats failed: %d\n",
+ err);
+ goto out;
+ }
+
+ pcdev->current_fmt = pcdev->user_formats;
+ pix->field = V4L2_FIELD_NONE;
+ pix->width = DEFAULT_WIDTH;
+ pix->height = DEFAULT_HEIGHT;
+ pix->bytesperline =
+ soc_mbus_bytes_per_line(pix->width,
+ pcdev->current_fmt->host_fmt);
+ pix->sizeimage =
+ soc_mbus_image_size(pcdev->current_fmt->host_fmt,
+ pix->bytesperline, pix->height);
+ pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
+ v4l2_fill_mbus_format(mf, pix, pcdev->current_fmt->code);
+ err = sensor_call(pcdev, pad, set_fmt, NULL, &format);
+ if (err)
+ goto out;
+
+ v4l2_fill_pix_format(pix, mf);
+ pr_info("%s(): colorspace=0x%x pixfmt=0x%x\n",
+ __func__, pix->colorspace, pix->pixelformat);
+
+ err = pxa_camera_init_videobuf2(pcdev);
+ if (err)
+ goto out;
+
+ err = video_register_device(&pcdev->vdev, VFL_TYPE_GRABBER, -1);
+ if (err) {
+ v4l2_err(v4l2_dev, "register video device failed: %d\n", err);
+ pcdev->sensor = NULL;
+ } else {
+ dev_info(pcdev_to_dev(pcdev),
+ "PXA Camera driver attached to camera %s\n",
+ subdev->name);
+ }
+out:
+ mutex_unlock(&pcdev->mlock);
+ return err;
+}
+
+static void pxa_camera_sensor_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(notifier->v4l2_dev);
+
+ mutex_lock(&pcdev->mlock);
+ dev_info(pcdev_to_dev(pcdev),
+ "PXA Camera driver detached from camera %s\n",
+ subdev->name);
+
+ /* disable capture, disable interrupts */
+ __raw_writel(0x3ff, pcdev->base + CICR0);
+
+ /* Stop DMA engine */
+ pxa_dma_stop_channels(pcdev);
+
+ pxa_camera_destroy_formats(pcdev);
+ video_unregister_device(&pcdev->vdev);
+ pcdev->sensor = NULL;
+
+ mutex_unlock(&pcdev->mlock);
+}
+
+/*
+ * Driver probe, remove, suspend and resume operations
+ */
+static int pxa_camera_suspend(struct device *dev)
+{
+ struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
+ int i = 0, ret = 0;
+
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);
+
+ if (pcdev->sensor) {
+ ret = sensor_call(pcdev, core, s_power, 0);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int pxa_camera_resume(struct device *dev)
+{
+ struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
+ int i = 0, ret = 0;
+
+ __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);
+
+ if (pcdev->sensor) {
+ ret = sensor_call(pcdev, core, s_power, 1);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ /* Restart frame capture if active buffer exists */
+ if (!ret && pcdev->active)
+ pxa_camera_start_capture(pcdev);
+
+ return ret;
+}
+
+static int pxa_camera_pdata_from_dt(struct device *dev,
+ struct pxa_camera_dev *pcdev,
+ struct v4l2_async_subdev *asd)
+{
+ u32 mclk_rate;
+ struct device_node *remote, *np = dev->of_node;
+ struct v4l2_of_endpoint ep;
+ int err = of_property_read_u32(np, "clock-frequency",
+ &mclk_rate);
+ if (!err) {
+ pcdev->platform_flags |= PXA_CAMERA_MCLK_EN;
+ pcdev->mclk = mclk_rate;
+ }
+
+ np = of_graph_get_next_endpoint(np, NULL);
+ if (!np) {
+ dev_err(dev, "could not find endpoint\n");
+ return -EINVAL;
+ }
+
+ err = v4l2_of_parse_endpoint(np, &ep);
+ if (err) {
+ dev_err(dev, "could not parse endpoint\n");
+ goto out;
+ }
+
+ switch (ep.bus.parallel.bus_width) {
+ case 4:
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_4;
+ break;
+ case 5:
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_5;
+ break;
+ case 8:
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_8;
+ break;
+ case 9:
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_9;
+ break;
+ case 10:
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
+ break;
+ default:
+ break;
+ }
+
+ if (ep.bus.parallel.flags & V4L2_MBUS_MASTER)
+ pcdev->platform_flags |= PXA_CAMERA_MASTER;
+ if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+ pcdev->platform_flags |= PXA_CAMERA_HSP;
+ if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
+ pcdev->platform_flags |= PXA_CAMERA_VSP;
+ if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+ pcdev->platform_flags |= PXA_CAMERA_PCLK_EN | PXA_CAMERA_PCP;
+ if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ pcdev->platform_flags |= PXA_CAMERA_PCLK_EN;
+
+ asd->match_type = V4L2_ASYNC_MATCH_OF;
+ remote = of_graph_get_remote_port(np);
+ if (remote) {
+ asd->match.of.node = remote;
+ of_node_put(remote);
+ } else {
+ dev_notice(dev, "no remote for %s\n", of_node_full_name(np));
+ }
+
+out:
+ of_node_put(np);
+
+ return err;
+}
+
+static int pxa_camera_probe(struct platform_device *pdev)
+{
+ struct pxa_camera_dev *pcdev;
+ struct resource *res;
+ void __iomem *base;
+ struct dma_slave_config config = {
+ .src_addr_width = 0,
+ .src_maxburst = 8,
+ .direction = DMA_DEV_TO_MEM,
+ };
+ dma_cap_mask_t mask;
+ struct pxad_param params;
+ char clk_name[V4L2_CLK_NAME_SIZE];
+ int irq;
+ int err = 0, i;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!res || irq < 0)
+ return -ENODEV;
+
+ pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
+ if (!pcdev) {
+ dev_err(&pdev->dev, "Could not allocate pcdev\n");
+ return -ENOMEM;
+ }
+
+ pcdev->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(pcdev->clk))
+ return PTR_ERR(pcdev->clk);
+
+ pcdev->res = res;
+
+ pcdev->pdata = pdev->dev.platform_data;
+ if (&pdev->dev.of_node && !pcdev->pdata) {
+ err = pxa_camera_pdata_from_dt(&pdev->dev, pcdev, &pcdev->asd);
+ } else {
+ pcdev->platform_flags = pcdev->pdata->flags;
+ pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
+ pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
+ pcdev->asd.match.i2c.adapter_id =
+ pcdev->pdata->sensor_i2c_adapter_id;
+ pcdev->asd.match.i2c.address = pcdev->pdata->sensor_i2c_address;
+ }
+ if (err < 0)
+ return err;
+
+ if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
+ PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
+ /*
+ * 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 10 bit\n");
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
+ }
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
+ pcdev->width_flags = 1 << 7;
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
+ pcdev->width_flags |= 1 << 8;
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
+ pcdev->width_flags |= 1 << 9;
+ if (!pcdev->mclk) {
+ dev_warn(&pdev->dev,
+ "mclk == 0! Please, fix your platform data. "
+ "Using default 20MHz\n");
+ pcdev->mclk = 20000000;
+ }
+
+ pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev);
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ spin_lock_init(&pcdev->lock);
+ mutex_init(&pcdev->mlock);
+
+ /*
+ * Request the regions.
+ */
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ pcdev->irq = irq;
+ pcdev->base = base;
+
+ /* request dma */
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ dma_cap_set(DMA_PRIVATE, mask);
+
+ params.prio = 0;
+ params.drcmr = 68;
+ pcdev->dma_chans[0] =
+ dma_request_slave_channel_compat(mask, pxad_filter_fn,
+ ¶ms, &pdev->dev, "CI_Y");
+ if (!pcdev->dma_chans[0]) {
+ dev_err(&pdev->dev, "Can't request DMA for Y\n");
+ return -ENODEV;
+ }
+
+ params.drcmr = 69;
+ pcdev->dma_chans[1] =
+ dma_request_slave_channel_compat(mask, pxad_filter_fn,
+ ¶ms, &pdev->dev, "CI_U");
+ if (!pcdev->dma_chans[1]) {
+ dev_err(&pdev->dev, "Can't request DMA for Y\n");
+ goto exit_free_dma_y;
+ }
+
+ params.drcmr = 70;
+ pcdev->dma_chans[2] =
+ dma_request_slave_channel_compat(mask, pxad_filter_fn,
+ ¶ms, &pdev->dev, "CI_V");
+ if (!pcdev->dma_chans[2]) {
+ dev_err(&pdev->dev, "Can't request DMA for V\n");
+ goto exit_free_dma_u;
+ }
+
+ for (i = 0; i < 3; i++) {
+ config.src_addr = pcdev->res->start + CIBR0 + i * 8;
+ err = dmaengine_slave_config(pcdev->dma_chans[i], &config);
+ if (err < 0) {
+ dev_err(&pdev->dev, "dma slave config failed: %d\n",
+ err);
+ goto exit_free_dma;
+ }
+ }
+
+ /* request irq */
+ err = devm_request_irq(&pdev->dev, pcdev->irq, pxa_camera_irq, 0,
+ PXA_CAM_DRV_NAME, pcdev);
+ if (err) {
+ dev_err(&pdev->dev, "Camera interrupt register failed\n");
+ goto exit_free_dma;
+ }
+
+ tasklet_init(&pcdev->task_eof, pxa_camera_eof, (unsigned long)pcdev);
+
+ pxa_camera_activate(pcdev);
+
+ dev_set_drvdata(&pdev->dev, pcdev);
+ err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
+ if (err)
+ goto exit_free_dma;
+
+ pcdev->asds[0] = &pcdev->asd;
+ pcdev->notifier.subdevs = pcdev->asds;
+ pcdev->notifier.num_subdevs = 1;
+ pcdev->notifier.bound = pxa_camera_sensor_bound;
+ pcdev->notifier.unbind = pxa_camera_sensor_unbind;
+
+ if (!of_have_populated_dt())
+ pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
+
+ err = pxa_camera_init_videobuf2(pcdev);
+ if (err)
+ goto exit_free_v4l2dev;
+
+ if (pcdev->mclk) {
+ v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
+ pcdev->asd.match.i2c.adapter_id,
+ pcdev->asd.match.i2c.address);
+
+ pcdev->mclk_clk = v4l2_clk_register(&pxa_camera_mclk_ops,
+ clk_name, NULL);
+ if (IS_ERR(pcdev->mclk_clk))
+ return PTR_ERR(pcdev->mclk_clk);
+ }
+
+ err = v4l2_async_notifier_register(&pcdev->v4l2_dev, &pcdev->notifier);
+ if (err)
+ goto exit_free_clk;
+
+ return 0;
+exit_free_clk:
+ v4l2_clk_unregister(pcdev->mclk_clk);
+exit_free_v4l2dev:
+ v4l2_device_unregister(&pcdev->v4l2_dev);
+exit_free_dma:
+ dma_release_channel(pcdev->dma_chans[2]);
+exit_free_dma_u:
+ dma_release_channel(pcdev->dma_chans[1]);
+exit_free_dma_y:
+ dma_release_channel(pcdev->dma_chans[0]);
+ return err;
+}
+
+static int pxa_camera_remove(struct platform_device *pdev)
+{
+ struct pxa_camera_dev *pcdev = dev_get_drvdata(&pdev->dev);
+
+ pxa_camera_deactivate(pcdev);
+ dma_release_channel(pcdev->dma_chans[0]);
+ dma_release_channel(pcdev->dma_chans[1]);
+ dma_release_channel(pcdev->dma_chans[2]);
+
+ v4l2_clk_unregister(pcdev->mclk_clk);
+ v4l2_device_unregister(&pcdev->v4l2_dev);
+
+ dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
+
+ return 0;
+}
+
+static const struct dev_pm_ops pxa_camera_pm = {
+ .suspend = pxa_camera_suspend,
+ .resume = pxa_camera_resume,
+};
+
+static const struct of_device_id pxa_camera_of_match[] = {
+ { .compatible = "marvell,pxa270-qci", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pxa_camera_of_match);
+
+static struct platform_driver pxa_camera_driver = {
+ .driver = {
+ .name = PXA_CAM_DRV_NAME,
+ .pm = &pxa_camera_pm,
+ .of_match_table = of_match_ptr(pxa_camera_of_match),
+ },
+ .probe = pxa_camera_probe,
+ .remove = pxa_camera_remove,
+};
+
+module_platform_driver(pxa_camera_driver);
+
+MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(PXA_CAM_VERSION);
+MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
help
This is a generic SoC camera platform driver, useful for testing
-config VIDEO_PXA27x
- tristate "PXA27x Quick Capture Interface driver"
- depends on VIDEO_DEV && PXA27x && HAS_DMA
- select VIDEOBUF2_DMA_SG
- select SG_SPLIT
- ---help---
- This is a v4l2 driver for the PXA27x Quick Capture Interface
-
config VIDEO_RCAR_VIN_OLD
tristate "R-Car Video Input (VIN) support (DEPRECATED)"
depends on VIDEO_DEV && SOC_CAMERA
# soc-camera host drivers have to be linked after camera drivers
obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
-obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
obj-$(CONFIG_VIDEO_RCAR_VIN_OLD) += rcar_vin.o
+++ /dev/null
-/*
- * V4L2 Driver for PXA camera host
- *
- * Copyright (C) 2006, Sascha Hauer, Pengutronix
- * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
- * Copyright (C) 2016, Robert Jarzmik <robert.jarzmik@free.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/time.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/dma/pxa-dma.h>
-
-#include <media/v4l2-async.h>
-#include <media/v4l2-clk.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-of.h>
-
-#include <media/drv-intf/soc_mediabus.h>
-#include <media/videobuf2-dma-sg.h>
-
-#include <linux/videodev2.h>
-
-#include <linux/platform_data/media/camera-pxa.h>
-
-#define PXA_CAM_VERSION "0.0.6"
-#define PXA_CAM_DRV_NAME "pxa27x-camera"
-
-#define DEFAULT_WIDTH 640
-#define DEFAULT_HEIGHT 480
-
-/* Camera Interface */
-#define CICR0 0x0000
-#define CICR1 0x0004
-#define CICR2 0x0008
-#define CICR3 0x000C
-#define CICR4 0x0010
-#define CISR 0x0014
-#define CIFR 0x0018
-#define CITOR 0x001C
-#define CIBR0 0x0028
-#define CIBR1 0x0030
-#define CIBR2 0x0038
-
-#define CICR0_DMAEN (1 << 31) /* DMA request enable */
-#define CICR0_PAR_EN (1 << 30) /* Parity enable */
-#define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
-#define CICR0_ENB (1 << 28) /* Camera interface enable */
-#define CICR0_DIS (1 << 27) /* Camera interface disable */
-#define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
-#define CICR0_TOM (1 << 9) /* Time-out mask */
-#define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
-#define CICR0_FEM (1 << 7) /* FIFO-empty mask */
-#define CICR0_EOLM (1 << 6) /* End-of-line mask */
-#define CICR0_PERRM (1 << 5) /* Parity-error mask */
-#define CICR0_QDM (1 << 4) /* Quick-disable mask */
-#define CICR0_CDM (1 << 3) /* Disable-done mask */
-#define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
-#define CICR0_EOFM (1 << 1) /* End-of-frame mask */
-#define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
-
-#define CICR1_TBIT (1 << 31) /* Transparency bit */
-#define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
-#define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
-#define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
-#define CICR1_RGB_F (1 << 11) /* RGB format */
-#define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
-#define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
-#define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
-#define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
-#define CICR1_DW (0x7 << 0) /* Data width mask */
-
-#define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
- wait count mask */
-#define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
- wait count mask */
-#define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
-#define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
- wait count mask */
-#define CICR2_FSW (0x7 << 0) /* Frame stabilization
- wait count mask */
-
-#define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
- wait count mask */
-#define CICR3_EFW (0xff << 16) /* End-of-frame line clock
- wait count mask */
-#define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
-#define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
- wait count mask */
-#define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
-
-#define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
-#define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
-#define CICR4_PCP (1 << 22) /* Pixel clock polarity */
-#define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
-#define CICR4_VSP (1 << 20) /* Vertical sync polarity */
-#define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
-#define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
-#define CICR4_DIV (0xff << 0) /* Clock divisor mask */
-
-#define CISR_FTO (1 << 15) /* FIFO time-out */
-#define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
-#define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
-#define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
-#define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
-#define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
-#define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
-#define CISR_EOL (1 << 8) /* End of line */
-#define CISR_PAR_ERR (1 << 7) /* Parity error */
-#define CISR_CQD (1 << 6) /* Camera interface quick disable */
-#define CISR_CDD (1 << 5) /* Camera interface disable done */
-#define CISR_SOF (1 << 4) /* Start of frame */
-#define CISR_EOF (1 << 3) /* End of frame */
-#define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
-#define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
-#define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
-
-#define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
-#define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
-#define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
-#define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
-#define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
-#define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
-#define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
-#define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
-
-#define CICR0_SIM_MP (0 << 24)
-#define CICR0_SIM_SP (1 << 24)
-#define CICR0_SIM_MS (2 << 24)
-#define CICR0_SIM_EP (3 << 24)
-#define CICR0_SIM_ES (4 << 24)
-
-#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
-#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
-#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
-#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
-#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
-
-#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
-#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
-#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
-#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
-#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
-
-#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
-#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
-#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
-#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
-
-#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
- CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
- CICR0_EOFM | CICR0_FOM)
-
-#define sensor_call(cam, o, f, args...) \
- v4l2_subdev_call(cam->sensor, o, f, ##args)
-
-/*
- * Format handling
- */
-/**
- * struct soc_camera_format_xlate - match between host and sensor formats
- * @code: code of a sensor provided format
- * @host_fmt: host format after host translation from code
- *
- * Host and sensor translation structure. Used in table of host and sensor
- * formats matchings in soc_camera_device. A host can override the generic list
- * generation by implementing get_formats(), and use it for format checks and
- * format setup.
- */
-struct soc_camera_format_xlate {
- u32 code;
- const struct soc_mbus_pixelfmt *host_fmt;
-};
-
-/*
- * Structures
- */
-enum pxa_camera_active_dma {
- DMA_Y = 0x1,
- DMA_U = 0x2,
- DMA_V = 0x4,
-};
-
-/* buffer for one video frame */
-struct pxa_buffer {
- /* common v4l buffer stuff -- must be first */
- struct vb2_v4l2_buffer vbuf;
- struct list_head queue;
- u32 code;
- int nb_planes;
- /* our descriptor lists for Y, U and V channels */
- struct dma_async_tx_descriptor *descs[3];
- dma_cookie_t cookie[3];
- struct scatterlist *sg[3];
- int sg_len[3];
- size_t plane_sizes[3];
- int inwork;
- enum pxa_camera_active_dma active_dma;
-};
-
-struct pxa_camera_dev {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct v4l2_async_notifier notifier;
- struct vb2_queue vb2_vq;
- struct v4l2_subdev *sensor;
- struct soc_camera_format_xlate *user_formats;
- const struct soc_camera_format_xlate *current_fmt;
- struct v4l2_pix_format current_pix;
-
- struct v4l2_async_subdev asd;
- struct v4l2_async_subdev *asds[1];
-
- /*
- * PXA27x is only supposed to handle one camera on its Quick Capture
- * interface. If anyone ever builds hardware to enable more than
- * one camera, they will have to modify this driver too
- */
- struct clk *clk;
-
- unsigned int irq;
- void __iomem *base;
-
- int channels;
- struct dma_chan *dma_chans[3];
-
- struct pxacamera_platform_data *pdata;
- struct resource *res;
- unsigned long platform_flags;
- unsigned long ciclk;
- unsigned long mclk;
- u32 mclk_divisor;
- struct v4l2_clk *mclk_clk;
- u16 width_flags; /* max 10 bits */
-
- struct list_head capture;
-
- spinlock_t lock;
- struct mutex mlock;
- unsigned int buf_sequence;
-
- struct pxa_buffer *active;
- struct tasklet_struct task_eof;
-
- u32 save_cicr[5];
-};
-
-struct pxa_cam {
- unsigned long flags;
-};
-
-static const char *pxa_cam_driver_description = "PXA_Camera";
-
-/*
- * Format translation functions
- */
-const struct soc_camera_format_xlate *soc_mbus_xlate_by_fourcc(
- struct soc_camera_format_xlate *user_formats, unsigned int fourcc)
-{
- unsigned int i;
-
- for (i = 0; user_formats[i].code; i++)
- if (user_formats[i].host_fmt->fourcc == fourcc)
- return user_formats + i;
- return NULL;
-}
-
-static struct soc_camera_format_xlate *soc_mbus_build_fmts_xlate(
- struct v4l2_device *v4l2_dev, struct v4l2_subdev *subdev,
- int (*get_formats)(struct v4l2_device *, unsigned int,
- struct soc_camera_format_xlate *xlate))
-{
- unsigned int i, fmts = 0, raw_fmts = 0;
- int ret;
- struct v4l2_subdev_mbus_code_enum code = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- struct soc_camera_format_xlate *user_formats;
-
- while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
- raw_fmts++;
- code.index++;
- }
-
- /*
- * First pass - only count formats this host-sensor
- * configuration can provide
- */
- for (i = 0; i < raw_fmts; i++) {
- ret = get_formats(v4l2_dev, i, NULL);
- if (ret < 0)
- return ERR_PTR(ret);
- fmts += ret;
- }
-
- if (!fmts)
- return ERR_PTR(-ENXIO);
-
- user_formats = kcalloc(fmts + 1, sizeof(*user_formats), GFP_KERNEL);
- if (!user_formats)
- return ERR_PTR(-ENOMEM);
-
- /* Second pass - actually fill data formats */
- fmts = 0;
- for (i = 0; i < raw_fmts; i++) {
- ret = get_formats(v4l2_dev, i, user_formats + fmts);
- if (ret < 0)
- goto egfmt;
- fmts += ret;
- }
- user_formats[fmts].code = 0;
-
- return user_formats;
-egfmt:
- kfree(user_formats);
- return ERR_PTR(ret);
-}
-
-/*
- * Videobuf operations
- */
-static struct pxa_buffer *vb2_to_pxa_buffer(struct vb2_buffer *vb)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-
- return container_of(vbuf, struct pxa_buffer, vbuf);
-}
-
-static struct device *pcdev_to_dev(struct pxa_camera_dev *pcdev)
-{
- return pcdev->v4l2_dev.dev;
-}
-
-static struct pxa_camera_dev *v4l2_dev_to_pcdev(struct v4l2_device *v4l2_dev)
-{
- return container_of(v4l2_dev, struct pxa_camera_dev, v4l2_dev);
-}
-
-static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
- enum pxa_camera_active_dma act_dma);
-
-static void pxa_camera_dma_irq_y(void *data)
-{
- struct pxa_camera_dev *pcdev = data;
-
- pxa_camera_dma_irq(pcdev, DMA_Y);
-}
-
-static void pxa_camera_dma_irq_u(void *data)
-{
- struct pxa_camera_dev *pcdev = data;
-
- pxa_camera_dma_irq(pcdev, DMA_U);
-}
-
-static void pxa_camera_dma_irq_v(void *data)
-{
- struct pxa_camera_dev *pcdev = data;
-
- pxa_camera_dma_irq(pcdev, DMA_V);
-}
-
-/**
- * pxa_init_dma_channel - init dma descriptors
- * @pcdev: pxa camera device
- * @vb: videobuffer2 buffer
- * @dma: dma video buffer
- * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
- * @cibr: camera Receive Buffer Register
- *
- * Prepares the pxa dma descriptors to transfer one camera channel.
- *
- * Returns 0 if success or -ENOMEM if no memory is available
- */
-static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
- struct pxa_buffer *buf, int channel,
- struct scatterlist *sg, int sglen)
-{
- struct dma_chan *dma_chan = pcdev->dma_chans[channel];
- struct dma_async_tx_descriptor *tx;
-
- tx = dmaengine_prep_slave_sg(dma_chan, sg, sglen, DMA_DEV_TO_MEM,
- DMA_PREP_INTERRUPT | DMA_CTRL_REUSE);
- if (!tx) {
- dev_err(pcdev_to_dev(pcdev),
- "dmaengine_prep_slave_sg failed\n");
- goto fail;
- }
-
- tx->callback_param = pcdev;
- switch (channel) {
- case 0:
- tx->callback = pxa_camera_dma_irq_y;
- break;
- case 1:
- tx->callback = pxa_camera_dma_irq_u;
- break;
- case 2:
- tx->callback = pxa_camera_dma_irq_v;
- break;
- }
-
- buf->descs[channel] = tx;
- return 0;
-fail:
- dev_dbg(pcdev_to_dev(pcdev),
- "%s (vb=%p) dma_tx=%p\n",
- __func__, buf, tx);
-
- return -ENOMEM;
-}
-
-static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev,
- struct pxa_buffer *buf)
-{
- buf->active_dma = DMA_Y;
- if (buf->nb_planes == 3)
- buf->active_dma |= DMA_U | DMA_V;
-}
-
-/**
- * pxa_dma_start_channels - start DMA channel for active buffer
- * @pcdev: pxa camera device
- *
- * Initialize DMA channels to the beginning of the active video buffer, and
- * start these channels.
- */
-static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev)
-{
- int i;
- struct pxa_buffer *active;
-
- active = pcdev->active;
-
- for (i = 0; i < pcdev->channels; i++) {
- dev_dbg(pcdev_to_dev(pcdev),
- "%s (channel=%d)\n", __func__, i);
- dma_async_issue_pending(pcdev->dma_chans[i]);
- }
-}
-
-static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev)
-{
- int i;
-
- for (i = 0; i < pcdev->channels; i++) {
- dev_dbg(pcdev_to_dev(pcdev),
- "%s (channel=%d)\n", __func__, i);
- dmaengine_terminate_all(pcdev->dma_chans[i]);
- }
-}
-
-static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev,
- struct pxa_buffer *buf)
-{
- int i;
-
- for (i = 0; i < pcdev->channels; i++) {
- buf->cookie[i] = dmaengine_submit(buf->descs[i]);
- dev_dbg(pcdev_to_dev(pcdev),
- "%s (channel=%d) : submit vb=%p cookie=%d\n",
- __func__, i, buf, buf->descs[i]->cookie);
- }
-}
-
-/**
- * pxa_camera_start_capture - start video capturing
- * @pcdev: camera device
- *
- * Launch capturing. DMA channels should not be active yet. They should get
- * activated at the end of frame interrupt, to capture only whole frames, and
- * never begin the capture of a partial frame.
- */
-static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
-{
- unsigned long cicr0;
-
- dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
- __raw_writel(__raw_readl(pcdev->base + CISR), pcdev->base + CISR);
- /* Enable End-Of-Frame Interrupt */
- cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
- cicr0 &= ~CICR0_EOFM;
- __raw_writel(cicr0, pcdev->base + CICR0);
-}
-
-static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev)
-{
- unsigned long cicr0;
-
- pxa_dma_stop_channels(pcdev);
-
- cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
- __raw_writel(cicr0, pcdev->base + CICR0);
-
- pcdev->active = NULL;
- dev_dbg(pcdev_to_dev(pcdev), "%s\n", __func__);
-}
-
-static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
- struct pxa_buffer *buf,
- enum vb2_buffer_state state)
-{
- struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
-
- /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
- list_del_init(&buf->queue);
- vb->timestamp = ktime_get_ns();
- vbuf->sequence = pcdev->buf_sequence++;
- vbuf->field = V4L2_FIELD_NONE;
- vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
- dev_dbg(pcdev_to_dev(pcdev), "%s dequeud buffer (buf=0x%p)\n",
- __func__, buf);
-
- if (list_empty(&pcdev->capture)) {
- pxa_camera_stop_capture(pcdev);
- return;
- }
-
- pcdev->active = list_entry(pcdev->capture.next,
- struct pxa_buffer, queue);
-}
-
-/**
- * pxa_camera_check_link_miss - check missed DMA linking
- * @pcdev: camera device
- *
- * The DMA chaining is done with DMA running. This means a tiny temporal window
- * remains, where a buffer is queued on the chain, while the chain is already
- * stopped. This means the tailed buffer would never be transferred by DMA.
- * This function restarts the capture for this corner case, where :
- * - DADR() == DADDR_STOP
- * - a videobuffer is queued on the pcdev->capture list
- *
- * Please check the "DMA hot chaining timeslice issue" in
- * Documentation/video4linux/pxa_camera.txt
- *
- * Context: should only be called within the dma irq handler
- */
-static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev,
- dma_cookie_t last_submitted,
- dma_cookie_t last_issued)
-{
- bool is_dma_stopped = last_submitted != last_issued;
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s : top queued buffer=%p, is_dma_stopped=%d\n",
- __func__, pcdev->active, is_dma_stopped);
-
- if (pcdev->active && is_dma_stopped)
- pxa_camera_start_capture(pcdev);
-}
-
-static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
- enum pxa_camera_active_dma act_dma)
-{
- struct pxa_buffer *buf, *last_buf;
- unsigned long flags;
- u32 camera_status, overrun;
- int chan;
- enum dma_status last_status;
- dma_cookie_t last_issued;
-
- spin_lock_irqsave(&pcdev->lock, flags);
-
- camera_status = __raw_readl(pcdev->base + CISR);
- dev_dbg(pcdev_to_dev(pcdev), "camera dma irq, cisr=0x%x dma=%d\n",
- camera_status, act_dma);
- overrun = CISR_IFO_0;
- if (pcdev->channels == 3)
- overrun |= CISR_IFO_1 | CISR_IFO_2;
-
- /*
- * pcdev->active should not be NULL in DMA irq handler.
- *
- * But there is one corner case : if capture was stopped due to an
- * overrun of channel 1, and at that same channel 2 was completed.
- *
- * When handling the overrun in DMA irq for channel 1, we'll stop the
- * capture and restart it (and thus set pcdev->active to NULL). But the
- * DMA irq handler will already be pending for channel 2. So on entering
- * the DMA irq handler for channel 2 there will be no active buffer, yet
- * that is normal.
- */
- if (!pcdev->active)
- goto out;
-
- buf = pcdev->active;
- WARN_ON(buf->inwork || list_empty(&buf->queue));
-
- /*
- * It's normal if the last frame creates an overrun, as there
- * are no more DMA descriptors to fetch from QCI fifos
- */
- switch (act_dma) {
- case DMA_U:
- chan = 1;
- break;
- case DMA_V:
- chan = 2;
- break;
- default:
- chan = 0;
- break;
- }
- last_buf = list_entry(pcdev->capture.prev,
- struct pxa_buffer, queue);
- last_status = dma_async_is_tx_complete(pcdev->dma_chans[chan],
- last_buf->cookie[chan],
- NULL, &last_issued);
- if (camera_status & overrun &&
- last_status != DMA_COMPLETE) {
- dev_dbg(pcdev_to_dev(pcdev), "FIFO overrun! CISR: %x\n",
- camera_status);
- pxa_camera_stop_capture(pcdev);
- list_for_each_entry(buf, &pcdev->capture, queue)
- pxa_dma_add_tail_buf(pcdev, buf);
- pxa_camera_start_capture(pcdev);
- goto out;
- }
- buf->active_dma &= ~act_dma;
- if (!buf->active_dma) {
- pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_DONE);
- pxa_camera_check_link_miss(pcdev, last_buf->cookie[chan],
- last_issued);
- }
-
-out:
- spin_unlock_irqrestore(&pcdev->lock, flags);
-}
-
-static u32 mclk_get_divisor(struct platform_device *pdev,
- struct pxa_camera_dev *pcdev)
-{
- unsigned long mclk = pcdev->mclk;
- u32 div;
- unsigned long lcdclk;
-
- lcdclk = clk_get_rate(pcdev->clk);
- pcdev->ciclk = lcdclk;
-
- /* mclk <= ciclk / 4 (27.4.2) */
- if (mclk > lcdclk / 4) {
- mclk = lcdclk / 4;
- dev_warn(pcdev_to_dev(pcdev),
- "Limiting master clock to %lu\n", mclk);
- }
-
- /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
- div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
-
- /* If we're not supplying MCLK, leave it at 0 */
- if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
- pcdev->mclk = lcdclk / (2 * (div + 1));
-
- dev_dbg(pcdev_to_dev(pcdev), "LCD clock %luHz, target freq %luHz, divisor %u\n",
- lcdclk, mclk, div);
-
- return div;
-}
-
-static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
- unsigned long pclk)
-{
- /* We want a timeout > 1 pixel time, not ">=" */
- u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
-
- __raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
-}
-
-static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
-{
- u32 cicr4 = 0;
-
- /* disable all interrupts */
- __raw_writel(0x3ff, pcdev->base + CICR0);
-
- if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
- cicr4 |= CICR4_PCLK_EN;
- if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
- cicr4 |= CICR4_MCLK_EN;
- if (pcdev->platform_flags & PXA_CAMERA_PCP)
- cicr4 |= CICR4_PCP;
- if (pcdev->platform_flags & PXA_CAMERA_HSP)
- cicr4 |= CICR4_HSP;
- if (pcdev->platform_flags & PXA_CAMERA_VSP)
- cicr4 |= CICR4_VSP;
-
- __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
-
- if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
- /* Initialise the timeout under the assumption pclk = mclk */
- recalculate_fifo_timeout(pcdev, pcdev->mclk);
- else
- /* "Safe default" - 13MHz */
- recalculate_fifo_timeout(pcdev, 13000000);
-
- clk_prepare_enable(pcdev->clk);
-}
-
-static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
-{
- clk_disable_unprepare(pcdev->clk);
-}
-
-static void pxa_camera_eof(unsigned long arg)
-{
- struct pxa_camera_dev *pcdev = (struct pxa_camera_dev *)arg;
- unsigned long cifr;
- struct pxa_buffer *buf;
-
- dev_dbg(pcdev_to_dev(pcdev),
- "Camera interrupt status 0x%x\n",
- __raw_readl(pcdev->base + CISR));
-
- /* Reset the FIFOs */
- cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
- __raw_writel(cifr, pcdev->base + CIFR);
-
- pcdev->active = list_first_entry(&pcdev->capture,
- struct pxa_buffer, queue);
- buf = pcdev->active;
- pxa_videobuf_set_actdma(pcdev, buf);
-
- pxa_dma_start_channels(pcdev);
-}
-
-static irqreturn_t pxa_camera_irq(int irq, void *data)
-{
- struct pxa_camera_dev *pcdev = data;
- unsigned long status, cicr0;
-
- status = __raw_readl(pcdev->base + CISR);
- dev_dbg(pcdev_to_dev(pcdev),
- "Camera interrupt status 0x%lx\n", status);
-
- if (!status)
- return IRQ_NONE;
-
- __raw_writel(status, pcdev->base + CISR);
-
- if (status & CISR_EOF) {
- cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
- __raw_writel(cicr0, pcdev->base + CICR0);
- tasklet_schedule(&pcdev->task_eof);
- }
-
- return IRQ_HANDLED;
-}
-
-static int test_platform_param(struct pxa_camera_dev *pcdev,
- unsigned char buswidth, unsigned long *flags)
-{
- /*
- * Platform specified synchronization and pixel clock polarities are
- * only a recommendation and are only used during probing. The PXA270
- * quick capture interface supports both.
- */
- *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
- V4L2_MBUS_MASTER : V4L2_MBUS_SLAVE) |
- V4L2_MBUS_HSYNC_ACTIVE_HIGH |
- V4L2_MBUS_HSYNC_ACTIVE_LOW |
- V4L2_MBUS_VSYNC_ACTIVE_HIGH |
- V4L2_MBUS_VSYNC_ACTIVE_LOW |
- V4L2_MBUS_DATA_ACTIVE_HIGH |
- V4L2_MBUS_PCLK_SAMPLE_RISING |
- V4L2_MBUS_PCLK_SAMPLE_FALLING;
-
- /* If requested data width is supported by the platform, use it */
- if ((1 << (buswidth - 1)) & pcdev->width_flags)
- return 0;
-
- return -EINVAL;
-}
-
-static void pxa_camera_setup_cicr(struct pxa_camera_dev *pcdev,
- unsigned long flags, __u32 pixfmt)
-{
- unsigned long dw, bpp;
- u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0, y_skip_top;
- int ret = sensor_call(pcdev, sensor, g_skip_top_lines, &y_skip_top);
-
- if (ret < 0)
- y_skip_top = 0;
-
- /*
- * Datawidth is now guaranteed to be equal to one of the three values.
- * We fix bit-per-pixel equal to data-width...
- */
- switch (pcdev->current_fmt->host_fmt->bits_per_sample) {
- case 10:
- dw = 4;
- bpp = 0x40;
- break;
- case 9:
- dw = 3;
- bpp = 0x20;
- break;
- default:
- /*
- * Actually it can only be 8 now,
- * default is just to silence compiler warnings
- */
- case 8:
- dw = 2;
- bpp = 0;
- }
-
- if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
- cicr4 |= CICR4_PCLK_EN;
- if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
- cicr4 |= CICR4_MCLK_EN;
- if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
- cicr4 |= CICR4_PCP;
- if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
- cicr4 |= CICR4_HSP;
- if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
- cicr4 |= CICR4_VSP;
-
- cicr0 = __raw_readl(pcdev->base + CICR0);
- if (cicr0 & CICR0_ENB)
- __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
-
- cicr1 = CICR1_PPL_VAL(pcdev->current_pix.width - 1) | bpp | dw;
-
- switch (pixfmt) {
- case V4L2_PIX_FMT_YUV422P:
- pcdev->channels = 3;
- cicr1 |= CICR1_YCBCR_F;
- /*
- * Normally, pxa bus wants as input UYVY format. We allow all
- * reorderings of the YUV422 format, as no processing is done,
- * and the YUV stream is just passed through without any
- * transformation. Note that UYVY is the only format that
- * should be used if pxa framebuffer Overlay2 is used.
- */
- case V4L2_PIX_FMT_UYVY:
- case V4L2_PIX_FMT_VYUY:
- case V4L2_PIX_FMT_YUYV:
- case V4L2_PIX_FMT_YVYU:
- cicr1 |= CICR1_COLOR_SP_VAL(2);
- break;
- case V4L2_PIX_FMT_RGB555:
- cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
- CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
- break;
- case V4L2_PIX_FMT_RGB565:
- cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
- break;
- }
-
- cicr2 = 0;
- cicr3 = CICR3_LPF_VAL(pcdev->current_pix.height - 1) |
- CICR3_BFW_VAL(min((u32)255, y_skip_top));
- cicr4 |= pcdev->mclk_divisor;
-
- __raw_writel(cicr1, pcdev->base + CICR1);
- __raw_writel(cicr2, pcdev->base + CICR2);
- __raw_writel(cicr3, pcdev->base + CICR3);
- __raw_writel(cicr4, pcdev->base + CICR4);
-
- /* CIF interrupts are not used, only DMA */
- cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ?
- CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
- cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
- __raw_writel(cicr0, pcdev->base + CICR0);
-}
-
-/*
- * Videobuf2 section
- */
-static void pxa_buffer_cleanup(struct pxa_buffer *buf)
-{
- int i;
-
- for (i = 0; i < 3 && buf->descs[i]; i++) {
- dmaengine_desc_free(buf->descs[i]);
- kfree(buf->sg[i]);
- buf->descs[i] = NULL;
- buf->sg[i] = NULL;
- buf->sg_len[i] = 0;
- buf->plane_sizes[i] = 0;
- }
- buf->nb_planes = 0;
-}
-
-static int pxa_buffer_init(struct pxa_camera_dev *pcdev,
- struct pxa_buffer *buf)
-{
- struct vb2_buffer *vb = &buf->vbuf.vb2_buf;
- struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
- int nb_channels = pcdev->channels;
- int i, ret = 0;
- unsigned long size = vb2_plane_size(vb, 0);
-
- switch (nb_channels) {
- case 1:
- buf->plane_sizes[0] = size;
- break;
- case 3:
- buf->plane_sizes[0] = size / 2;
- buf->plane_sizes[1] = size / 4;
- buf->plane_sizes[2] = size / 4;
- break;
- default:
- return -EINVAL;
- };
- buf->nb_planes = nb_channels;
-
- ret = sg_split(sgt->sgl, sgt->nents, 0, nb_channels,
- buf->plane_sizes, buf->sg, buf->sg_len, GFP_KERNEL);
- if (ret < 0) {
- dev_err(pcdev_to_dev(pcdev),
- "sg_split failed: %d\n", ret);
- return ret;
- }
- for (i = 0; i < nb_channels; i++) {
- ret = pxa_init_dma_channel(pcdev, buf, i,
- buf->sg[i], buf->sg_len[i]);
- if (ret) {
- pxa_buffer_cleanup(buf);
- return ret;
- }
- }
- INIT_LIST_HEAD(&buf->queue);
-
- return ret;
-}
-
-static void pxac_vb2_cleanup(struct vb2_buffer *vb)
-{
- struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s(vb=%p)\n", __func__, vb);
- pxa_buffer_cleanup(buf);
-}
-
-static void pxac_vb2_queue(struct vb2_buffer *vb)
-{
- struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s(vb=%p) nb_channels=%d size=%lu active=%p\n",
- __func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0),
- pcdev->active);
-
- list_add_tail(&buf->queue, &pcdev->capture);
-
- pxa_dma_add_tail_buf(pcdev, buf);
-}
-
-/*
- * Please check the DMA prepared buffer structure in :
- * Documentation/video4linux/pxa_camera.txt
- * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
- * modification while DMA chain is running will work anyway.
- */
-static int pxac_vb2_prepare(struct vb2_buffer *vb)
-{
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
- struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
- int ret = 0;
-
- switch (pcdev->channels) {
- case 1:
- case 3:
- vb2_set_plane_payload(vb, 0, pcdev->current_pix.sizeimage);
- break;
- default:
- return -EINVAL;
- }
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s (vb=%p) nb_channels=%d size=%lu\n",
- __func__, vb, pcdev->channels, vb2_get_plane_payload(vb, 0));
-
- WARN_ON(!pcdev->current_fmt);
-
-#ifdef DEBUG
- /*
- * This can be useful if you want to see if we actually fill
- * the buffer with something
- */
- for (i = 0; i < vb->num_planes; i++)
- memset((void *)vb2_plane_vaddr(vb, i),
- 0xaa, vb2_get_plane_payload(vb, i));
-#endif
-
- /*
- * I think, in buf_prepare you only have to protect global data,
- * the actual buffer is yours
- */
- buf->inwork = 0;
- pxa_videobuf_set_actdma(pcdev, buf);
-
- return ret;
-}
-
-static int pxac_vb2_init(struct vb2_buffer *vb)
-{
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vb->vb2_queue);
- struct pxa_buffer *buf = vb2_to_pxa_buffer(vb);
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s(nb_channels=%d)\n",
- __func__, pcdev->channels);
-
- return pxa_buffer_init(pcdev, buf);
-}
-
-static int pxac_vb2_queue_setup(struct vb2_queue *vq,
- unsigned int *nbufs,
- unsigned int *num_planes, unsigned int sizes[],
- struct device *alloc_devs[])
-{
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
- int size = pcdev->current_pix.sizeimage;
-
- dev_dbg(pcdev_to_dev(pcdev),
- "%s(vq=%p nbufs=%d num_planes=%d size=%d)\n",
- __func__, vq, *nbufs, *num_planes, size);
- /*
- * Called from VIDIOC_REQBUFS or in compatibility mode For YUV422P
- * format, even if there are 3 planes Y, U and V, we reply there is only
- * one plane, containing Y, U and V data, one after the other.
- */
- if (*num_planes)
- return sizes[0] < size ? -EINVAL : 0;
-
- *num_planes = 1;
- switch (pcdev->channels) {
- case 1:
- case 3:
- sizes[0] = size;
- break;
- default:
- return -EINVAL;
- }
-
- if (!*nbufs)
- *nbufs = 1;
-
- return 0;
-}
-
-static int pxac_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
-{
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
-
- dev_dbg(pcdev_to_dev(pcdev), "%s(count=%d) active=%p\n",
- __func__, count, pcdev->active);
-
- pcdev->buf_sequence = 0;
- if (!pcdev->active)
- pxa_camera_start_capture(pcdev);
-
- return 0;
-}
-
-static void pxac_vb2_stop_streaming(struct vb2_queue *vq)
-{
- struct pxa_camera_dev *pcdev = vb2_get_drv_priv(vq);
- struct pxa_buffer *buf, *tmp;
-
- dev_dbg(pcdev_to_dev(pcdev), "%s active=%p\n",
- __func__, pcdev->active);
- pxa_camera_stop_capture(pcdev);
-
- list_for_each_entry_safe(buf, tmp, &pcdev->capture, queue)
- pxa_camera_wakeup(pcdev, buf, VB2_BUF_STATE_ERROR);
-}
-
-static struct vb2_ops pxac_vb2_ops = {
- .queue_setup = pxac_vb2_queue_setup,
- .buf_init = pxac_vb2_init,
- .buf_prepare = pxac_vb2_prepare,
- .buf_queue = pxac_vb2_queue,
- .buf_cleanup = pxac_vb2_cleanup,
- .start_streaming = pxac_vb2_start_streaming,
- .stop_streaming = pxac_vb2_stop_streaming,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
-};
-
-static int pxa_camera_init_videobuf2(struct pxa_camera_dev *pcdev)
-{
- int ret;
- struct vb2_queue *vq = &pcdev->vb2_vq;
-
- memset(vq, 0, sizeof(*vq));
- vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
- vq->drv_priv = pcdev;
- vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- vq->buf_struct_size = sizeof(struct pxa_buffer);
- vq->dev = pcdev->v4l2_dev.dev;
-
- vq->ops = &pxac_vb2_ops;
- vq->mem_ops = &vb2_dma_sg_memops;
- vq->lock = &pcdev->mlock;
-
- ret = vb2_queue_init(vq);
- dev_dbg(pcdev_to_dev(pcdev),
- "vb2_queue_init(vq=%p): %d\n", vq, ret);
-
- return ret;
-}
-
-/*
- * Video ioctls section
- */
-static int pxa_camera_set_bus_param(struct pxa_camera_dev *pcdev)
-{
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- u32 pixfmt = pcdev->current_fmt->host_fmt->fourcc;
- unsigned long bus_flags, common_flags;
- int ret;
-
- ret = test_platform_param(pcdev,
- pcdev->current_fmt->host_fmt->bits_per_sample,
- &bus_flags);
- if (ret < 0)
- return ret;
-
- ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = soc_mbus_config_compatible(&cfg,
- bus_flags);
- if (!common_flags) {
- dev_warn(pcdev_to_dev(pcdev),
- "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;
- }
-
- pcdev->channels = 1;
-
- /* Make choises, based on platform preferences */
- if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & PXA_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 (pcdev->platform_flags & PXA_CAMERA_VSP)
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
- }
-
- if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
- (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
- if (pcdev->platform_flags & PXA_CAMERA_PCP)
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
- else
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
- }
-
- cfg.flags = common_flags;
- ret = sensor_call(pcdev, video, s_mbus_config, &cfg);
- if (ret < 0 && ret != -ENOIOCTLCMD) {
- dev_dbg(pcdev_to_dev(pcdev),
- "camera s_mbus_config(0x%lx) returned %d\n",
- common_flags, ret);
- return ret;
- }
-
- pxa_camera_setup_cicr(pcdev, common_flags, pixfmt);
-
- return 0;
-}
-
-static int pxa_camera_try_bus_param(struct pxa_camera_dev *pcdev,
- unsigned char buswidth)
-{
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- unsigned long bus_flags, common_flags;
- int ret = test_platform_param(pcdev, buswidth, &bus_flags);
-
- if (ret < 0)
- return ret;
-
- ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = soc_mbus_config_compatible(&cfg,
- bus_flags);
- if (!common_flags) {
- dev_warn(pcdev_to_dev(pcdev),
- "Flags incompatible: camera 0x%x, host 0x%lx\n",
- cfg.flags, bus_flags);
- return -EINVAL;
- }
- } else if (ret == -ENOIOCTLCMD) {
- ret = 0;
- }
-
- return ret;
-}
-
-static const struct soc_mbus_pixelfmt pxa_camera_formats[] = {
- {
- .fourcc = V4L2_PIX_FMT_YUV422P,
- .name = "Planar YUV422 16 bit",
- .bits_per_sample = 8,
- .packing = SOC_MBUS_PACKING_2X8_PADHI,
- .order = SOC_MBUS_ORDER_LE,
- .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_U_V,
- },
-};
-
-/* This will be corrected as we get more formats */
-static bool pxa_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 pxa_camera_get_formats(struct v4l2_device *v4l2_dev,
- unsigned int idx,
- struct soc_camera_format_xlate *xlate)
-{
- struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
- 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 = sensor_call(pcdev, pad, enum_mbus_code, NULL, &code);
- if (ret < 0)
- /* No more formats */
- return 0;
-
- fmt = soc_mbus_get_fmtdesc(code.code);
- if (!fmt) {
- dev_err(pcdev_to_dev(pcdev),
- "Invalid format code #%u: %d\n", idx, code.code);
- return 0;
- }
-
- /* This also checks support for the requested bits-per-sample */
- ret = pxa_camera_try_bus_param(pcdev, fmt->bits_per_sample);
- if (ret < 0)
- return 0;
-
- switch (code.code) {
- case MEDIA_BUS_FMT_UYVY8_2X8:
- formats++;
- if (xlate) {
- xlate->host_fmt = &pxa_camera_formats[0];
- xlate->code = code.code;
- xlate++;
- dev_dbg(pcdev_to_dev(pcdev),
- "Providing format %s using code %d\n",
- pxa_camera_formats[0].name, code.code);
- }
- case MEDIA_BUS_FMT_VYUY8_2X8:
- case MEDIA_BUS_FMT_YUYV8_2X8:
- case MEDIA_BUS_FMT_YVYU8_2X8:
- case MEDIA_BUS_FMT_RGB565_2X8_LE:
- case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
- if (xlate)
- dev_dbg(pcdev_to_dev(pcdev),
- "Providing format %s packed\n",
- fmt->name);
- break;
- default:
- if (!pxa_camera_packing_supported(fmt))
- return 0;
- if (xlate)
- dev_dbg(pcdev_to_dev(pcdev),
- "Providing format %s in pass-through mode\n",
- fmt->name);
- }
-
- /* Generic pass-through */
- formats++;
- if (xlate) {
- xlate->host_fmt = fmt;
- xlate->code = code.code;
- xlate++;
- }
-
- return formats;
-}
-
-static int pxa_camera_build_formats(struct pxa_camera_dev *pcdev)
-{
- struct soc_camera_format_xlate *xlate;
-
- xlate = soc_mbus_build_fmts_xlate(&pcdev->v4l2_dev, pcdev->sensor,
- pxa_camera_get_formats);
- if (IS_ERR(xlate))
- return PTR_ERR(xlate);
-
- pcdev->user_formats = xlate;
- return 0;
-}
-
-static void pxa_camera_destroy_formats(struct pxa_camera_dev *pcdev)
-{
- kfree(pcdev->user_formats);
-}
-
-static int pxa_camera_check_frame(u32 width, u32 height)
-{
- /* limit to pxa hardware capabilities */
- return height < 32 || height > 2048 || width < 48 || width > 2048 ||
- (width & 0x01);
-}
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-static int pxac_vidioc_g_register(struct file *file, void *priv,
- struct v4l2_dbg_register *reg)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(file);
-
- if (reg->reg > CIBR2)
- return -ERANGE;
-
- reg->val = __raw_readl(pcdev->base + reg->reg);
- reg->size = sizeof(__u32);
- return 0;
-}
-
-static int pxac_vidioc_s_register(struct file *file, void *priv,
- const struct v4l2_dbg_register *reg)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(file);
-
- if (reg->reg > CIBR2)
- return -ERANGE;
- if (reg->size != sizeof(__u32))
- return -EINVAL;
- __raw_writel(reg->val, pcdev->base + reg->reg);
- return 0;
-}
-#endif
-
-static int pxac_vidioc_enum_fmt_vid_cap(struct file *filp, void *priv,
- struct v4l2_fmtdesc *f)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- const struct soc_mbus_pixelfmt *format;
- unsigned int idx;
-
- for (idx = 0; pcdev->user_formats[idx].code; idx++);
- if (f->index >= idx)
- return -EINVAL;
-
- format = pcdev->user_formats[f->index].host_fmt;
- f->pixelformat = format->fourcc;
- return 0;
-}
-
-static int pxac_vidioc_g_fmt_vid_cap(struct file *filp, void *priv,
- struct v4l2_format *f)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- struct v4l2_pix_format *pix = &f->fmt.pix;
-
- pix->width = pcdev->current_pix.width;
- pix->height = pcdev->current_pix.height;
- pix->bytesperline = pcdev->current_pix.bytesperline;
- pix->sizeimage = pcdev->current_pix.sizeimage;
- pix->field = pcdev->current_pix.field;
- pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
- pix->colorspace = pcdev->current_pix.colorspace;
- dev_dbg(pcdev_to_dev(pcdev), "current_fmt->fourcc: 0x%08x\n",
- pcdev->current_fmt->host_fmt->fourcc);
- return 0;
-}
-
-static int pxac_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
- struct v4l2_format *f)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- 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_mbus_xlate_by_fourcc(pcdev->user_formats, pixfmt);
- if (!xlate) {
- dev_warn(pcdev_to_dev(pcdev), "Format %x not found\n", pixfmt);
- return -EINVAL;
- }
-
- /*
- * Limit to pxa hardware capabilities. YUV422P planar format requires
- * images size to be a multiple of 16 bytes. If not, zeros will be
- * inserted between Y and U planes, and U and V planes, which violates
- * the YUV422P standard.
- */
- v4l_bound_align_image(&pix->width, 48, 2048, 1,
- &pix->height, 32, 2048, 0,
- pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0);
-
- v4l2_fill_mbus_format(mf, pix, xlate->code);
- ret = sensor_call(pcdev, pad, set_fmt, &pad_cfg, &format);
- if (ret < 0)
- return ret;
-
- v4l2_fill_pix_format(pix, mf);
-
- /* Only progressive video supported so far */
- switch (mf->field) {
- case V4L2_FIELD_ANY:
- case V4L2_FIELD_NONE:
- pix->field = V4L2_FIELD_NONE;
- break;
- default:
- /* TODO: support interlaced at least in pass-through mode */
- dev_err(pcdev_to_dev(pcdev), "Field type %d unsupported.\n",
- mf->field);
- return -EINVAL;
- }
-
- ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
- if (ret < 0)
- return ret;
-
- pix->bytesperline = ret;
- ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
- pix->height);
- if (ret < 0)
- return ret;
-
- pix->sizeimage = ret;
- return 0;
-}
-
-static int pxac_vidioc_s_fmt_vid_cap(struct file *filp, void *priv,
- struct v4l2_format *f)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- 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,
- };
- unsigned long flags;
- int ret, is_busy;
-
- dev_dbg(pcdev_to_dev(pcdev),
- "s_fmt_vid_cap(pix=%dx%d:%x)\n",
- pix->width, pix->height, pix->pixelformat);
-
- spin_lock_irqsave(&pcdev->lock, flags);
- is_busy = pcdev->active || vb2_is_busy(&pcdev->vb2_vq);
- spin_unlock_irqrestore(&pcdev->lock, flags);
-
- if (is_busy)
- return -EBUSY;
-
- ret = pxac_vidioc_try_fmt_vid_cap(filp, priv, f);
- if (ret)
- return ret;
-
- xlate = soc_mbus_xlate_by_fourcc(pcdev->user_formats,
- pix->pixelformat);
- v4l2_fill_mbus_format(&format.format, pix, xlate->code);
- ret = sensor_call(pcdev, pad, set_fmt, NULL, &format);
- if (ret < 0) {
- dev_warn(pcdev_to_dev(pcdev),
- "Failed to configure for format %x\n",
- pix->pixelformat);
- } else if (pxa_camera_check_frame(pix->width, pix->height)) {
- dev_warn(pcdev_to_dev(pcdev),
- "Camera driver produced an unsupported frame %dx%d\n",
- pix->width, pix->height);
- return -EINVAL;
- }
-
- pcdev->current_fmt = xlate;
- pcdev->current_pix = *pix;
-
- ret = pxa_camera_set_bus_param(pcdev);
- return ret;
-}
-
-static int pxac_vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
-{
- strlcpy(cap->bus_info, "platform:pxa-camera", sizeof(cap->bus_info));
- strlcpy(cap->driver, PXA_CAM_DRV_NAME, sizeof(cap->driver));
- strlcpy(cap->card, pxa_cam_driver_description, 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 pxac_vidioc_enum_input(struct file *file, void *priv,
- struct v4l2_input *i)
-{
- if (i->index > 0)
- return -EINVAL;
-
- i->type = V4L2_INPUT_TYPE_CAMERA;
- strlcpy(i->name, "Camera", sizeof(i->name));
-
- return 0;
-}
-
-static int pxac_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
-{
- *i = 0;
-
- return 0;
-}
-
-static int pxac_vidioc_s_input(struct file *file, void *priv, unsigned int i)
-{
- if (i > 0)
- return -EINVAL;
-
- return 0;
-}
-
-static int pxac_fops_camera_open(struct file *filp)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- int ret;
-
- mutex_lock(&pcdev->mlock);
- ret = v4l2_fh_open(filp);
- if (ret < 0)
- goto out;
-
- ret = sensor_call(pcdev, core, s_power, 1);
- if (ret)
- v4l2_fh_release(filp);
-out:
- mutex_unlock(&pcdev->mlock);
- return ret;
-}
-
-static int pxac_fops_camera_release(struct file *filp)
-{
- struct pxa_camera_dev *pcdev = video_drvdata(filp);
- int ret;
-
- ret = vb2_fop_release(filp);
- if (ret < 0)
- return ret;
-
- mutex_lock(&pcdev->mlock);
- ret = sensor_call(pcdev, core, s_power, 0);
- mutex_unlock(&pcdev->mlock);
-
- return ret;
-}
-
-static const struct v4l2_file_operations pxa_camera_fops = {
- .owner = THIS_MODULE,
- .open = pxac_fops_camera_open,
- .release = pxac_fops_camera_release,
- .read = vb2_fop_read,
- .poll = vb2_fop_poll,
- .mmap = vb2_fop_mmap,
- .unlocked_ioctl = video_ioctl2,
-};
-
-static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops = {
- .vidioc_querycap = pxac_vidioc_querycap,
-
- .vidioc_enum_input = pxac_vidioc_enum_input,
- .vidioc_g_input = pxac_vidioc_g_input,
- .vidioc_s_input = pxac_vidioc_s_input,
-
- .vidioc_enum_fmt_vid_cap = pxac_vidioc_enum_fmt_vid_cap,
- .vidioc_g_fmt_vid_cap = pxac_vidioc_g_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = pxac_vidioc_s_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = pxac_vidioc_try_fmt_vid_cap,
-
- .vidioc_reqbufs = vb2_ioctl_reqbufs,
- .vidioc_create_bufs = vb2_ioctl_create_bufs,
- .vidioc_querybuf = vb2_ioctl_querybuf,
- .vidioc_qbuf = vb2_ioctl_qbuf,
- .vidioc_dqbuf = vb2_ioctl_dqbuf,
- .vidioc_expbuf = vb2_ioctl_expbuf,
- .vidioc_streamon = vb2_ioctl_streamon,
- .vidioc_streamoff = vb2_ioctl_streamoff,
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- .vidioc_g_register = pxac_vidioc_g_register,
- .vidioc_s_register = pxac_vidioc_s_register,
-#endif
-};
-
-static struct v4l2_clk_ops pxa_camera_mclk_ops = {
-};
-
-static const struct video_device pxa_camera_videodev_template = {
- .name = "pxa-camera",
- .minor = -1,
- .fops = &pxa_camera_fops,
- .ioctl_ops = &pxa_camera_ioctl_ops,
- .release = video_device_release_empty,
- .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING,
-};
-
-static int pxa_camera_sensor_bound(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *subdev,
- struct v4l2_async_subdev *asd)
-{
- int err;
- struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
- struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(v4l2_dev);
- struct video_device *vdev = &pcdev->vdev;
- struct v4l2_pix_format *pix = &pcdev->current_pix;
- struct v4l2_subdev_format format = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- struct v4l2_mbus_framefmt *mf = &format.format;
-
- dev_info(pcdev_to_dev(pcdev), "%s(): trying to bind a device\n",
- __func__);
- mutex_lock(&pcdev->mlock);
- *vdev = pxa_camera_videodev_template;
- vdev->v4l2_dev = v4l2_dev;
- vdev->lock = &pcdev->mlock;
- pcdev->sensor = subdev;
- pcdev->vdev.queue = &pcdev->vb2_vq;
- pcdev->vdev.v4l2_dev = &pcdev->v4l2_dev;
- pcdev->vdev.ctrl_handler = subdev->ctrl_handler;
- video_set_drvdata(&pcdev->vdev, pcdev);
-
- err = pxa_camera_build_formats(pcdev);
- if (err) {
- dev_err(pcdev_to_dev(pcdev), "building formats failed: %d\n",
- err);
- goto out;
- }
-
- pcdev->current_fmt = pcdev->user_formats;
- pix->field = V4L2_FIELD_NONE;
- pix->width = DEFAULT_WIDTH;
- pix->height = DEFAULT_HEIGHT;
- pix->bytesperline =
- soc_mbus_bytes_per_line(pix->width,
- pcdev->current_fmt->host_fmt);
- pix->sizeimage =
- soc_mbus_image_size(pcdev->current_fmt->host_fmt,
- pix->bytesperline, pix->height);
- pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
- v4l2_fill_mbus_format(mf, pix, pcdev->current_fmt->code);
- err = sensor_call(pcdev, pad, set_fmt, NULL, &format);
- if (err)
- goto out;
-
- v4l2_fill_pix_format(pix, mf);
- pr_info("%s(): colorspace=0x%x pixfmt=0x%x\n",
- __func__, pix->colorspace, pix->pixelformat);
-
- err = pxa_camera_init_videobuf2(pcdev);
- if (err)
- goto out;
-
- err = video_register_device(&pcdev->vdev, VFL_TYPE_GRABBER, -1);
- if (err) {
- v4l2_err(v4l2_dev, "register video device failed: %d\n", err);
- pcdev->sensor = NULL;
- } else {
- dev_info(pcdev_to_dev(pcdev),
- "PXA Camera driver attached to camera %s\n",
- subdev->name);
- }
-out:
- mutex_unlock(&pcdev->mlock);
- return err;
-}
-
-static void pxa_camera_sensor_unbind(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *subdev,
- struct v4l2_async_subdev *asd)
-{
- struct pxa_camera_dev *pcdev = v4l2_dev_to_pcdev(notifier->v4l2_dev);
-
- mutex_lock(&pcdev->mlock);
- dev_info(pcdev_to_dev(pcdev),
- "PXA Camera driver detached from camera %s\n",
- subdev->name);
-
- /* disable capture, disable interrupts */
- __raw_writel(0x3ff, pcdev->base + CICR0);
-
- /* Stop DMA engine */
- pxa_dma_stop_channels(pcdev);
-
- pxa_camera_destroy_formats(pcdev);
- video_unregister_device(&pcdev->vdev);
- pcdev->sensor = NULL;
-
- mutex_unlock(&pcdev->mlock);
-}
-
-/*
- * Driver probe, remove, suspend and resume operations
- */
-static int pxa_camera_suspend(struct device *dev)
-{
- struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
- int i = 0, ret = 0;
-
- pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0);
- pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1);
- pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2);
- pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
- pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);
-
- if (pcdev->sensor) {
- ret = sensor_call(pcdev, core, s_power, 0);
- if (ret == -ENOIOCTLCMD)
- ret = 0;
- }
-
- return ret;
-}
-
-static int pxa_camera_resume(struct device *dev)
-{
- struct pxa_camera_dev *pcdev = dev_get_drvdata(dev);
- int i = 0, ret = 0;
-
- __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0);
- __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1);
- __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2);
- __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
- __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);
-
- if (pcdev->sensor) {
- ret = sensor_call(pcdev, core, s_power, 1);
- if (ret == -ENOIOCTLCMD)
- ret = 0;
- }
-
- /* Restart frame capture if active buffer exists */
- if (!ret && pcdev->active)
- pxa_camera_start_capture(pcdev);
-
- return ret;
-}
-
-static int pxa_camera_pdata_from_dt(struct device *dev,
- struct pxa_camera_dev *pcdev,
- struct v4l2_async_subdev *asd)
-{
- u32 mclk_rate;
- struct device_node *remote, *np = dev->of_node;
- struct v4l2_of_endpoint ep;
- int err = of_property_read_u32(np, "clock-frequency",
- &mclk_rate);
- if (!err) {
- pcdev->platform_flags |= PXA_CAMERA_MCLK_EN;
- pcdev->mclk = mclk_rate;
- }
-
- np = of_graph_get_next_endpoint(np, NULL);
- if (!np) {
- dev_err(dev, "could not find endpoint\n");
- return -EINVAL;
- }
-
- err = v4l2_of_parse_endpoint(np, &ep);
- if (err) {
- dev_err(dev, "could not parse endpoint\n");
- goto out;
- }
-
- switch (ep.bus.parallel.bus_width) {
- case 4:
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_4;
- break;
- case 5:
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_5;
- break;
- case 8:
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_8;
- break;
- case 9:
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_9;
- break;
- case 10:
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
- break;
- default:
- break;
- }
-
- if (ep.bus.parallel.flags & V4L2_MBUS_MASTER)
- pcdev->platform_flags |= PXA_CAMERA_MASTER;
- if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
- pcdev->platform_flags |= PXA_CAMERA_HSP;
- if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
- pcdev->platform_flags |= PXA_CAMERA_VSP;
- if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
- pcdev->platform_flags |= PXA_CAMERA_PCLK_EN | PXA_CAMERA_PCP;
- if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
- pcdev->platform_flags |= PXA_CAMERA_PCLK_EN;
-
- asd->match_type = V4L2_ASYNC_MATCH_OF;
- remote = of_graph_get_remote_port(np);
- if (remote) {
- asd->match.of.node = remote;
- of_node_put(remote);
- } else {
- dev_notice(dev, "no remote for %s\n", of_node_full_name(np));
- }
-
-out:
- of_node_put(np);
-
- return err;
-}
-
-static int pxa_camera_probe(struct platform_device *pdev)
-{
- struct pxa_camera_dev *pcdev;
- struct resource *res;
- void __iomem *base;
- struct dma_slave_config config = {
- .src_addr_width = 0,
- .src_maxburst = 8,
- .direction = DMA_DEV_TO_MEM,
- };
- dma_cap_mask_t mask;
- struct pxad_param params;
- char clk_name[V4L2_CLK_NAME_SIZE];
- int irq;
- int err = 0, i;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irq = platform_get_irq(pdev, 0);
- if (!res || irq < 0)
- return -ENODEV;
-
- pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
- if (!pcdev) {
- dev_err(&pdev->dev, "Could not allocate pcdev\n");
- return -ENOMEM;
- }
-
- pcdev->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(pcdev->clk))
- return PTR_ERR(pcdev->clk);
-
- pcdev->res = res;
-
- pcdev->pdata = pdev->dev.platform_data;
- if (&pdev->dev.of_node && !pcdev->pdata) {
- err = pxa_camera_pdata_from_dt(&pdev->dev, pcdev, &pcdev->asd);
- } else {
- pcdev->platform_flags = pcdev->pdata->flags;
- pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
- pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
- pcdev->asd.match.i2c.adapter_id =
- pcdev->pdata->sensor_i2c_adapter_id;
- pcdev->asd.match.i2c.address = pcdev->pdata->sensor_i2c_address;
- }
- if (err < 0)
- return err;
-
- if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
- PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
- /*
- * 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 10 bit\n");
- pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
- }
- if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
- pcdev->width_flags = 1 << 7;
- if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
- pcdev->width_flags |= 1 << 8;
- if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
- pcdev->width_flags |= 1 << 9;
- if (!pcdev->mclk) {
- dev_warn(&pdev->dev,
- "mclk == 0! Please, fix your platform data. "
- "Using default 20MHz\n");
- pcdev->mclk = 20000000;
- }
-
- pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev);
-
- INIT_LIST_HEAD(&pcdev->capture);
- spin_lock_init(&pcdev->lock);
- mutex_init(&pcdev->mlock);
-
- /*
- * Request the regions.
- */
- base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- pcdev->irq = irq;
- pcdev->base = base;
-
- /* request dma */
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- dma_cap_set(DMA_PRIVATE, mask);
-
- params.prio = 0;
- params.drcmr = 68;
- pcdev->dma_chans[0] =
- dma_request_slave_channel_compat(mask, pxad_filter_fn,
- ¶ms, &pdev->dev, "CI_Y");
- if (!pcdev->dma_chans[0]) {
- dev_err(&pdev->dev, "Can't request DMA for Y\n");
- return -ENODEV;
- }
-
- params.drcmr = 69;
- pcdev->dma_chans[1] =
- dma_request_slave_channel_compat(mask, pxad_filter_fn,
- ¶ms, &pdev->dev, "CI_U");
- if (!pcdev->dma_chans[1]) {
- dev_err(&pdev->dev, "Can't request DMA for Y\n");
- goto exit_free_dma_y;
- }
-
- params.drcmr = 70;
- pcdev->dma_chans[2] =
- dma_request_slave_channel_compat(mask, pxad_filter_fn,
- ¶ms, &pdev->dev, "CI_V");
- if (!pcdev->dma_chans[2]) {
- dev_err(&pdev->dev, "Can't request DMA for V\n");
- goto exit_free_dma_u;
- }
-
- for (i = 0; i < 3; i++) {
- config.src_addr = pcdev->res->start + CIBR0 + i * 8;
- err = dmaengine_slave_config(pcdev->dma_chans[i], &config);
- if (err < 0) {
- dev_err(&pdev->dev, "dma slave config failed: %d\n",
- err);
- goto exit_free_dma;
- }
- }
-
- /* request irq */
- err = devm_request_irq(&pdev->dev, pcdev->irq, pxa_camera_irq, 0,
- PXA_CAM_DRV_NAME, pcdev);
- if (err) {
- dev_err(&pdev->dev, "Camera interrupt register failed\n");
- goto exit_free_dma;
- }
-
- tasklet_init(&pcdev->task_eof, pxa_camera_eof, (unsigned long)pcdev);
-
- pxa_camera_activate(pcdev);
-
- dev_set_drvdata(&pdev->dev, pcdev);
- err = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
- if (err)
- goto exit_free_dma;
-
- pcdev->asds[0] = &pcdev->asd;
- pcdev->notifier.subdevs = pcdev->asds;
- pcdev->notifier.num_subdevs = 1;
- pcdev->notifier.bound = pxa_camera_sensor_bound;
- pcdev->notifier.unbind = pxa_camera_sensor_unbind;
-
- if (!of_have_populated_dt())
- pcdev->asd.match_type = V4L2_ASYNC_MATCH_I2C;
-
- err = pxa_camera_init_videobuf2(pcdev);
- if (err)
- goto exit_free_v4l2dev;
-
- if (pcdev->mclk) {
- v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
- pcdev->asd.match.i2c.adapter_id,
- pcdev->asd.match.i2c.address);
-
- pcdev->mclk_clk = v4l2_clk_register(&pxa_camera_mclk_ops,
- clk_name, NULL);
- if (IS_ERR(pcdev->mclk_clk))
- return PTR_ERR(pcdev->mclk_clk);
- }
-
- err = v4l2_async_notifier_register(&pcdev->v4l2_dev, &pcdev->notifier);
- if (err)
- goto exit_free_clk;
-
- return 0;
-exit_free_clk:
- v4l2_clk_unregister(pcdev->mclk_clk);
-exit_free_v4l2dev:
- v4l2_device_unregister(&pcdev->v4l2_dev);
-exit_free_dma:
- dma_release_channel(pcdev->dma_chans[2]);
-exit_free_dma_u:
- dma_release_channel(pcdev->dma_chans[1]);
-exit_free_dma_y:
- dma_release_channel(pcdev->dma_chans[0]);
- return err;
-}
-
-static int pxa_camera_remove(struct platform_device *pdev)
-{
- struct pxa_camera_dev *pcdev = dev_get_drvdata(&pdev->dev);
-
- pxa_camera_deactivate(pcdev);
- dma_release_channel(pcdev->dma_chans[0]);
- dma_release_channel(pcdev->dma_chans[1]);
- dma_release_channel(pcdev->dma_chans[2]);
-
- v4l2_clk_unregister(pcdev->mclk_clk);
- v4l2_device_unregister(&pcdev->v4l2_dev);
-
- dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
-
- return 0;
-}
-
-static const struct dev_pm_ops pxa_camera_pm = {
- .suspend = pxa_camera_suspend,
- .resume = pxa_camera_resume,
-};
-
-static const struct of_device_id pxa_camera_of_match[] = {
- { .compatible = "marvell,pxa270-qci", },
- {},
-};
-MODULE_DEVICE_TABLE(of, pxa_camera_of_match);
-
-static struct platform_driver pxa_camera_driver = {
- .driver = {
- .name = PXA_CAM_DRV_NAME,
- .pm = &pxa_camera_pm,
- .of_match_table = of_match_ptr(pxa_camera_of_match),
- },
- .probe = pxa_camera_probe,
- .remove = pxa_camera_remove,
-};
-
-module_platform_driver(pxa_camera_driver);
-
-MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
-MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(PXA_CAM_VERSION);
-MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff