diff options
| -rw-r--r-- | drivers/media/video/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/media/video/Makefile | 1 | ||||
| -rw-r--r-- | drivers/media/video/sh_mobile_csi2.c | 354 | ||||
| -rw-r--r-- | include/media/sh_mobile_csi2.h | 46 |
4 files changed, 407 insertions, 0 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index c627f776c1e9..0f1ac401dedd 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -876,6 +876,12 @@ config VIDEO_PXA27x ---help--- This is a v4l2 driver for the PXA27x Quick Capture Interface +config VIDEO_SH_MOBILE_CSI2 + tristate "SuperH Mobile MIPI CSI-2 Interface driver" + depends on VIDEO_DEV && SOC_CAMERA && HAVE_CLK + ---help--- + This is a v4l2 driver for the SuperH MIPI CSI-2 Interface + config VIDEO_SH_MOBILE_CEU tristate "SuperH Mobile CEU Interface driver" depends on VIDEO_DEV && SOC_CAMERA && HAS_DMA && HAVE_CLK diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index eba259fbf7ef..88478630e854 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -160,6 +160,7 @@ obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o +obj-$(CONFIG_VIDEO_SH_MOBILE_CSI2) += sh_mobile_csi2.o obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o obj-$(CONFIG_ARCH_DAVINCI) += davinci/ diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c new file mode 100644 index 000000000000..84a646819318 --- /dev/null +++ b/drivers/media/video/sh_mobile_csi2.c @@ -0,0 +1,354 @@ +/* + * Driver for the SH-Mobile MIPI CSI-2 unit + * + * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/slab.h> +#include <linux/videodev2.h> + +#include <media/sh_mobile_csi2.h> +#include <media/soc_camera.h> +#include <media/v4l2-common.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-device.h> +#include <media/v4l2-mediabus.h> +#include <media/v4l2-subdev.h> + +#define SH_CSI2_TREF 0x00 +#define SH_CSI2_SRST 0x04 +#define SH_CSI2_PHYCNT 0x08 +#define SH_CSI2_CHKSUM 0x0C +#define SH_CSI2_VCDT 0x10 + +struct sh_csi2 { + struct v4l2_subdev subdev; + struct list_head list; + struct notifier_block notifier; + unsigned int irq; + void __iomem *base; + struct platform_device *pdev; + struct sh_csi2_client_config *client; +}; + +static int sh_csi2_try_fmt(struct v4l2_subdev *sd, + struct v4l2_mbus_framefmt *mf) +{ + struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev); + struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; + + if (mf->width > 8188) + mf->width = 8188; + else if (mf->width & 1) + mf->width &= ~1; + + switch (pdata->type) { + case SH_CSI2C: + switch (mf->code) { + case V4L2_MBUS_FMT_UYVY8_2X8: /* YUV422 */ + case V4L2_MBUS_FMT_YUYV8_1_5X8: /* YUV420 */ + case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */ + case V4L2_MBUS_FMT_SBGGR8_1X8: + case V4L2_MBUS_FMT_SGRBG8_1X8: + break; + default: + /* All MIPI CSI-2 devices must support one of primary formats */ + mf->code = V4L2_MBUS_FMT_YUYV8_2X8; + } + break; + case SH_CSI2I: + switch (mf->code) { + case V4L2_MBUS_FMT_GREY8_1X8: /* RAW8 */ + case V4L2_MBUS_FMT_SBGGR8_1X8: + case V4L2_MBUS_FMT_SGRBG8_1X8: + case V4L2_MBUS_FMT_SBGGR10_1X10: /* RAW10 */ + case V4L2_MBUS_FMT_SBGGR12_1X12: /* RAW12 */ + break; + default: + /* All MIPI CSI-2 devices must support one of primary formats */ + mf->code = V4L2_MBUS_FMT_SBGGR8_1X8; + } + break; + } + + return 0; +} + +/* + * We have done our best in try_fmt to try and tell the sensor, which formats + * we support. If now the configuration is unsuitable for us we can only + * error out. + */ +static int sh_csi2_s_fmt(struct v4l2_subdev *sd, + struct v4l2_mbus_framefmt *mf) +{ + struct sh_csi2 *priv = container_of(sd, struct sh_csi2, subdev); + u32 tmp = (priv->client->channel & 3) << 8; + + dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code); + if (mf->width > 8188 || mf->width & 1) + return -EINVAL; + + switch (mf->code) { + case V4L2_MBUS_FMT_UYVY8_2X8: + tmp |= 0x1e; /* YUV422 8 bit */ + break; + case V4L2_MBUS_FMT_YUYV8_1_5X8: + tmp |= 0x18; /* YUV420 8 bit */ + break; + case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE: + tmp |= 0x21; /* RGB555 */ + break; + case V4L2_MBUS_FMT_RGB565_2X8_BE: + tmp |= 0x22; /* RGB565 */ + break; + case V4L2_MBUS_FMT_GREY8_1X8: + case V4L2_MBUS_FMT_SBGGR8_1X8: + case V4L2_MBUS_FMT_SGRBG8_1X8: + tmp |= 0x2a; /* RAW8 */ + break; + default: + return -EINVAL; + } + + iowrite32(tmp, priv->base + SH_CSI2_VCDT); + + return 0; +} + +static struct v4l2_subdev_video_ops sh_csi2_subdev_video_ops = { + .s_mbus_fmt = sh_csi2_s_fmt, + .try_mbus_fmt = sh_csi2_try_fmt, +}; + +static struct v4l2_subdev_core_ops sh_csi2_subdev_core_ops; + +static struct v4l2_subdev_ops sh_csi2_subdev_ops = { + .core = &sh_csi2_subdev_core_ops, + .video = &sh_csi2_subdev_video_ops, +}; + +static void sh_csi2_hwinit(struct sh_csi2 *priv) +{ + struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; + __u32 tmp = 0x10; /* Enable MIPI CSI clock lane */ + + /* Reflect registers immediately */ + iowrite32(0x00000001, priv->base + SH_CSI2_TREF); + /* reset CSI2 harware */ + iowrite32(0x00000001, priv->base + SH_CSI2_SRST); + udelay(5); + iowrite32(0x00000000, priv->base + SH_CSI2_SRST); + + if (priv->client->lanes & 3) + tmp |= priv->client->lanes & 3; + else + /* Default - both lanes */ + tmp |= 3; + + if (priv->client->phy == SH_CSI2_PHY_MAIN) + tmp |= 0x8000; + + iowrite32(tmp, priv->base + SH_CSI2_PHYCNT); + + tmp = 0; + if (pdata->flags & SH_CSI2_ECC) + tmp |= 2; + if (pdata->flags & SH_CSI2_CRC) + tmp |= 1; + iowrite32(tmp, priv->base + SH_CSI2_CHKSUM); +} + +static int sh_csi2_set_bus_param(struct soc_camera_device *icd, + unsigned long flags) +{ + return 0; +} + +static unsigned long sh_csi2_query_bus_param(struct soc_camera_device *icd) +{ + struct soc_camera_link *icl = to_soc_camera_link(icd); + const unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | + SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | + SOCAM_MASTER | SOCAM_DATAWIDTH_8 | SOCAM_DATA_ACTIVE_HIGH; + + return soc_camera_apply_sensor_flags(icl, flags); +} + +static int sh_csi2_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct soc_camera_device *icd = to_soc_camera_dev(dev); + struct v4l2_device *v4l2_dev = dev_get_drvdata(dev->parent); + struct sh_csi2 *priv = + container_of(nb, struct sh_csi2, notifier); + struct sh_csi2_pdata *pdata = priv->pdev->dev.platform_data; + int ret, i; + + for (i = 0; i < pdata->num_clients; i++) + if (&pdata->clients[i].pdev->dev == icd->pdev) + break; + + dev_dbg(dev, "%s(%p): action = %lu, found #%d\n", __func__, dev, action, i); + + if (i == pdata->num_clients) + return NOTIFY_DONE; + + switch (action) { + case BUS_NOTIFY_BOUND_DRIVER: + snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s%s", + dev_name(v4l2_dev->dev), ".mipi-csi"); + ret = v4l2_device_register_subdev(v4l2_dev, &priv->subdev); + dev_dbg(dev, "%s(%p): ret(register_subdev) = %d\n", __func__, priv, ret); + if (ret < 0) + return NOTIFY_DONE; + + priv->client = pdata->clients + i; + + icd->ops->set_bus_param = sh_csi2_set_bus_param; + icd->ops->query_bus_param = sh_csi2_query_bus_param; + + pm_runtime_get_sync(v4l2_get_subdevdata(&priv->subdev)); + + sh_csi2_hwinit(priv); + break; + case BUS_NOTIFY_UNBIND_DRIVER: + priv->client = NULL; + + /* Driver is about to be unbound */ + icd->ops->set_bus_param = NULL; + icd->ops->query_bus_param = NULL; + + v4l2_device_unregister_subdev(&priv->subdev); + + pm_runtime_put(v4l2_get_subdevdata(&priv->subdev)); + break; + } + + return NOTIFY_OK; +} + +static __devinit int sh_csi2_probe(struct platform_device *pdev) +{ + struct resource *res; + unsigned int irq; + int ret; + struct sh_csi2 *priv; + /* Platform data specify the PHY, lanes, ECC, CRC */ + struct sh_csi2_pdata *pdata = pdev->dev.platform_data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + /* Interrupt unused so far */ + irq = platform_get_irq(pdev, 0); + + if (!res || (int)irq <= 0 || !pdata) { + dev_err(&pdev->dev, "Not enough CSI2 platform resources.\n"); + return -ENODEV; + } + + /* TODO: Add support for CSI2I. Careful: different register layout! */ + if (pdata->type != SH_CSI2C) { + dev_err(&pdev->dev, "Only CSI2C supported ATM.\n"); + return -EINVAL; + } + + priv = kzalloc(sizeof(struct sh_csi2), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->irq = irq; + priv->notifier.notifier_call = sh_csi2_notify; + + /* We MUST attach after the MIPI sensor */ + ret = bus_register_notifier(&soc_camera_bus_type, &priv->notifier); + if (ret < 0) { + dev_err(&pdev->dev, "CSI2 cannot register notifier\n"); + goto ernotify; + } + + if (!request_mem_region(res->start, resource_size(res), pdev->name)) { + dev_err(&pdev->dev, "CSI2 register region already claimed\n"); + ret = -EBUSY; + goto ereqreg; + } + + priv->base = ioremap(res->start, resource_size(res)); + if (!priv->base) { + ret = -ENXIO; + dev_err(&pdev->dev, "Unable to ioremap CSI2 registers.\n"); + goto eremap; + } + + priv->pdev = pdev; + + v4l2_subdev_init(&priv->subdev, &sh_csi2_subdev_ops); + v4l2_set_subdevdata(&priv->subdev, &pdev->dev); + + platform_set_drvdata(pdev, priv); + + pm_runtime_enable(&pdev->dev); + + dev_dbg(&pdev->dev, "CSI2 probed.\n"); + + return 0; + +eremap: + release_mem_region(res->start, resource_size(res)); +ereqreg: + bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier); +ernotify: + kfree(priv); + + return ret; +} + +static __devexit int sh_csi2_remove(struct platform_device *pdev) +{ + struct sh_csi2 *priv = platform_get_drvdata(pdev); + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + bus_unregister_notifier(&soc_camera_bus_type, &priv->notifier); + pm_runtime_disable(&pdev->dev); + iounmap(priv->base); + release_mem_region(res->start, resource_size(res)); + platform_set_drvdata(pdev, NULL); + kfree(priv); + + return 0; +} + +static struct platform_driver __refdata sh_csi2_pdrv = { + .remove = __devexit_p(sh_csi2_remove), + .driver = { + .name = "sh-mobile-csi2", + .owner = THIS_MODULE, + }, +}; + +static int __init sh_csi2_init(void) +{ + return platform_driver_probe(&sh_csi2_pdrv, sh_csi2_probe); +} + +static void __exit sh_csi2_exit(void) +{ + platform_driver_unregister(&sh_csi2_pdrv); +} + +module_init(sh_csi2_init); +module_exit(sh_csi2_exit); + +MODULE_DESCRIPTION("SH-Mobile MIPI CSI-2 driver"); +MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:sh-mobile-csi2"); diff --git a/include/media/sh_mobile_csi2.h b/include/media/sh_mobile_csi2.h new file mode 100644 index 000000000000..4d2615174461 --- /dev/null +++ b/include/media/sh_mobile_csi2.h @@ -0,0 +1,46 @@ +/* + * Driver header for the SH-Mobile MIPI CSI-2 unit + * + * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef SH_MIPI_CSI +#define SH_MIPI_CSI + +enum sh_csi2_phy { + SH_CSI2_PHY_MAIN, + SH_CSI2_PHY_SUB, +}; + +enum sh_csi2_type { + SH_CSI2C, + SH_CSI2I, +}; + +#define SH_CSI2_CRC (1 << 0) +#define SH_CSI2_ECC (1 << 1) + +struct platform_device; + +struct sh_csi2_client_config { + enum sh_csi2_phy phy; + unsigned char lanes; /* bitmask[3:0] */ + unsigned char channel; /* 0..3 */ + struct platform_device *pdev; /* client platform device */ +}; + +struct sh_csi2_pdata { + enum sh_csi2_type type; + unsigned int flags; + struct sh_csi2_client_config *clients; + int num_clients; +}; + +struct device; +struct v4l2_device; + +#endif |