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V4L/DVB: V4L2: soc-camera: add a MIPI CSI-2 driver for SH-Mobile platforms
Some SH-Mobile SoCs implement a MIPI CSI-2 controller, that can interface to several video clients and send data to the CEU or to the Image Signal Processor. This patch implements a v4l2-subdevice driver for CSI-2 to be used within the soc-camera framework, implementing the second subdevice in addition to the actual video clients. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski
Mauro Carvalho Chehab
parent
52d268a362
commit
077e2c10c9
@ -876,6 +876,12 @@ config VIDEO_PXA27x
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---help---
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This is a v4l2 driver for the PXA27x Quick Capture Interface
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config VIDEO_SH_MOBILE_CSI2
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tristate "SuperH Mobile MIPI CSI-2 Interface driver"
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depends on VIDEO_DEV && SOC_CAMERA && HAVE_CLK
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---help---
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This is a v4l2 driver for the SuperH MIPI CSI-2 Interface
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config VIDEO_SH_MOBILE_CEU
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tristate "SuperH Mobile CEU Interface driver"
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depends on VIDEO_DEV && SOC_CAMERA && HAS_DMA && HAVE_CLK
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@ -160,6 +160,7 @@ obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o
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obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o
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obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o
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obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
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obj-$(CONFIG_VIDEO_SH_MOBILE_CSI2) += sh_mobile_csi2.o
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obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
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obj-$(CONFIG_ARCH_DAVINCI) += davinci/
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354
drivers/media/video/sh_mobile_csi2.c
Normal file
354
drivers/media/video/sh_mobile_csi2.c
Normal file
@ -0,0 +1,354 @@
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/*
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* Driver for the SH-Mobile MIPI CSI-2 unit
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*
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* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <media/sh_mobile_csi2.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-mediabus.h>
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#include <media/v4l2-subdev.h>
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#define SH_CSI2_TREF 0x00
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#define SH_CSI2_SRST 0x04
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#define SH_CSI2_PHYCNT 0x08
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#define SH_CSI2_CHKSUM 0x0C
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#define SH_CSI2_VCDT 0x10
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struct sh_csi2 {
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struct v4l2_subdev subdev;
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struct list_head list;
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struct notifier_block notifier;
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unsigned int irq;
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void __iomem *base;
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struct platform_device *pdev;
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struct sh_csi2_client_config *client;
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};
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static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
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struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
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if (mf->width > 8188)
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mf->width = 8188;
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else if (mf->width & 1)
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mf->width &= ~1;
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switch (pdata->type) {
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case SH_CSI2C:
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switch (mf->code) {
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case V4L2_MBUS_FMT_UYVY8_2X8: /* YUV422 */
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case V4L2_MBUS_FMT_YUYV8_1_5X8: /* YUV420 */
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case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */
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case V4L2_MBUS_FMT_SBGGR8_1X8:
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case V4L2_MBUS_FMT_SGRBG8_1X8:
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break;
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default:
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/* All MIPI CSI-2 devices must support one of primary formats */
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mf->code = V4L2_MBUS_FMT_YUYV8_2X8;
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}
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break;
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case SH_CSI2I:
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switch (mf->code) {
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case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */
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case V4L2_MBUS_FMT_SBGGR8_1X8:
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case V4L2_MBUS_FMT_SGRBG8_1X8:
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case V4L2_MBUS_FMT_SBGGR10_1X10: /* RAW10 */
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case V4L2_MBUS_FMT_SBGGR12_1X12: /* RAW12 */
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break;
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default:
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/* All MIPI CSI-2 devices must support one of primary formats */
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mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
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}
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break;
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}
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return 0;
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}
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/*
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* We have done our best in try_fmt to try and tell the sensor, which formats
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* we support. If now the configuration is unsuitable for us we can only
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* error out.
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*/
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static int sh_csi2_s_fmt(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *mf)
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{
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struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev);
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u32 tmp = (priv->client->channel & 3) << 8;
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dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
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if (mf->width > 8188 || mf->width & 1)
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return -EINVAL;
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switch (mf->code) {
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case V4L2_MBUS_FMT_UYVY8_2X8:
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tmp |= 0x1e; /* YUV422 8 bit */
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break;
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case V4L2_MBUS_FMT_YUYV8_1_5X8:
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tmp |= 0x18; /* YUV420 8 bit */
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break;
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case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
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tmp |= 0x21; /* RGB555 */
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break;
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case V4L2_MBUS_FMT_RGB565_2X8_BE:
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tmp |= 0x22; /* RGB565 */
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break;
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case V4L2_MBUS_FMT_GREY8_1X8:
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case V4L2_MBUS_FMT_SBGGR8_1X8:
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case V4L2_MBUS_FMT_SGRBG8_1X8:
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tmp |= 0x2a; /* RAW8 */
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break;
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default:
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return -EINVAL;
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}
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iowrite32(tmp, priv->base + SH_CSI2_VCDT);
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return 0;
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}
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static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = {
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.s_mbus_fmt = sh_csi2_s_fmt,
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.try_mbus_fmt = sh_csi2_try_fmt,
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};
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static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops;
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static struct v4l2_subdev_ops sh_csi2_subdev_ops = {
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.core = &sh_csi2_subdev_core_ops,
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.video = &sh_csi2_subdev_video_ops,
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};
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static void sh_csi2_hwinit(struct sh_csi2 *priv)
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{
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struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
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__u32 tmp = 0x10; /* Enable MIPI CSI clock lane */
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/* Reflect registers immediately */
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iowrite32(0x00000001, priv->base + SH_CSI2_TREF);
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/* reset CSI2 harware */
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iowrite32(0x00000001, priv->base + SH_CSI2_SRST);
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udelay(5);
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iowrite32(0x00000000, priv->base + SH_CSI2_SRST);
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if (priv->client->lanes & 3)
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tmp |= priv->client->lanes & 3;
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else
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/* Default - both lanes */
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tmp |= 3;
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if (priv->client->phy == SH_CSI2_PHY_MAIN)
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tmp |= 0x8000;
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iowrite32(tmp, priv->base + SH_CSI2_PHYCNT);
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tmp = 0;
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if (pdata->flags & SH_CSI2_ECC)
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tmp |= 2;
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if (pdata->flags & SH_CSI2_CRC)
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tmp |= 1;
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iowrite32(tmp, priv->base + SH_CSI2_CHKSUM);
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}
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static int sh_csi2_set_bus_param(struct soc_camera_device *icd,
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unsigned long flags)
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{
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return 0;
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}
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static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd)
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{
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struct soc_camera_link *icl = to_soc_camera_link(icd);
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const unsigned long flags = SOCAM_PCLK_SAMPLE_RISING |
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SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
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SOCAM_MASTER | SOCAM_DATAWIDTH_8 | SOCAM_DATA_ACTIVE_HIGH;
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return soc_camera_apply_sensor_flags(icl, flags);
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}
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static int sh_csi2_notify(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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struct device *dev = data;
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struct soc_camera_device *icd = to_soc_camera_dev(dev);
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struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent);
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struct sh_csi2 *priv =
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container_of(nb, struct sh_csi2, notifier);
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struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data;
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int ret, i;
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for (i = 0; i < pdata->num_clients; i++)
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if (&pdata->clients[i].pdev->dev == icd->pdev)
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break;
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dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i);
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if (i == pdata->num_clients)
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return NOTIFY_DONE;
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switch (action) {
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case BUS_NOTIFY_BOUND_DRIVER:
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snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s",
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dev_name(v4l2_dev->dev), ".mipi-csi");
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ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev);
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dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret);
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if (ret < 0)
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return NOTIFY_DONE;
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priv->client = pdata->clients + i;
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icd->ops->set_bus_param = sh_csi2_set_bus_param;
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icd->ops->query_bus_param = sh_csi2_query_bus_param;
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pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev));
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sh_csi2_hwinit(priv);
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break;
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case BUS_NOTIFY_UNBIND_DRIVER:
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priv->client = NULL;
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/* Driver is about to be unbound */
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icd->ops->set_bus_param = NULL;
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icd->ops->query_bus_param = NULL;
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v4l2_device_unregister_subdev(&priv->subdev);
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pm_runtime_put(v4l2_get_subdevdata(&priv->subdev));
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break;
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}
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return NOTIFY_OK;
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}
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static __devinit int sh_csi2_probe(struct platform_device *pdev)
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{
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struct resource *res;
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unsigned int irq;
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int ret;
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struct sh_csi2 *priv;
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/* Platform data specify the PHY, lanes, ECC, CRC */
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struct sh_csi2_pdata *pdata = pdev->dev.platform_data;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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/* Interrupt unused so far */
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irq = platform_get_irq(pdev, 0);
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if (!res || (int)irq <= 0 || !pdata) {
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dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n");
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return -ENODEV;
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}
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/* TODO: Add support for CSI2I. Careful: different register layout! */
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if (pdata->type != SH_CSI2C) {
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dev_err(&pdev->dev, "Only CSI2C supported ATM.\n");
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return -EINVAL;
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}
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priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->irq = irq;
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priv->notifier.notifier_call = sh_csi2_notify;
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/* We MUST attach after the MIPI sensor */
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ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier);
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if (ret < 0) {
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dev_err(&pdev->dev, "CSI2 cannot register notifier\n");
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goto ernotify;
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}
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if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
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dev_err(&pdev->dev, "CSI2 register region already claimed\n");
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ret = -EBUSY;
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goto ereqreg;
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}
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priv->base = ioremap(res->start, resource_size(res));
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if (!priv->base) {
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ret = -ENXIO;
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dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n");
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goto eremap;
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}
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priv->pdev = pdev;
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v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops);
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v4l2_set_subdevdata(&priv->subdev, &pdev->dev);
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platform_set_drvdata(pdev, priv);
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pm_runtime_enable(&pdev->dev);
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dev_dbg(&pdev->dev, "CSI2 probed.\n");
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return 0;
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eremap:
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release_mem_region(res->start, resource_size(res));
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ereqreg:
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bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
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ernotify:
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kfree(priv);
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return ret;
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}
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static __devexit int sh_csi2_remove(struct platform_device *pdev)
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{
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struct sh_csi2 *priv = platform_get_drvdata(pdev);
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier);
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pm_runtime_disable(&pdev->dev);
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iounmap(priv->base);
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release_mem_region(res->start, resource_size(res));
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platform_set_drvdata(pdev, NULL);
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kfree(priv);
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return 0;
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}
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static struct platform_driver __refdata sh_csi2_pdrv = {
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.remove = __devexit_p(sh_csi2_remove),
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.driver = {
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.name = "sh-mobile-csi2",
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.owner = THIS_MODULE,
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},
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};
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static int __init sh_csi2_init(void)
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{
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return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe);
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}
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static void __exit sh_csi2_exit(void)
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{
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platform_driver_unregister(&sh_csi2_pdrv);
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}
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module_init(sh_csi2_init);
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module_exit(sh_csi2_exit);
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MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver");
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MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:sh-mobile-csi2");
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46
include/media/sh_mobile_csi2.h
Normal file
46
include/media/sh_mobile_csi2.h
Normal file
@ -0,0 +1,46 @@
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/*
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* Driver header for the SH-Mobile MIPI CSI-2 unit
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*
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* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef SH_MIPI_CSI
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#define SH_MIPI_CSI
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enum sh_csi2_phy {
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SH_CSI2_PHY_MAIN,
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SH_CSI2_PHY_SUB,
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};
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enum sh_csi2_type {
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SH_CSI2C,
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SH_CSI2I,
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};
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#define SH_CSI2_CRC (1 << 0)
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#define SH_CSI2_ECC (1 << 1)
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struct platform_device;
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struct sh_csi2_client_config {
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enum sh_csi2_phy phy;
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unsigned char lanes; /* bitmask[3:0] */
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unsigned char channel; /* 0..3 */
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struct platform_device *pdev; /* client platform device */
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};
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struct sh_csi2_pdata {
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enum sh_csi2_type type;
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unsigned int flags;
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struct sh_csi2_client_config *clients;
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int num_clients;
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};
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struct device;
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struct v4l2_device;
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#endif
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