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Subject[V3, 4/4] media: platform: dwc: Add MIPI CSI-2 controller driver
Date
Add the Synopsys MIPI CSI-2 controller driver. This
controller driver is divided in platform dependent functions
and core functions. It also includes a platform for future
DesignWare drivers.

Signed-off-by: Luis Oliveira <lolivei@synopsys.com>
---
Changelog
v2-V3
- exposed IPI settings to userspace
- fixed headers

MAINTAINERS | 11 +
drivers/media/platform/dwc/Kconfig | 30 +-
drivers/media/platform/dwc/Makefile | 2 +
drivers/media/platform/dwc/dw-csi-plat.c | 699 +++++++++++++++++++++++++++++++
drivers/media/platform/dwc/dw-csi-plat.h | 77 ++++
drivers/media/platform/dwc/dw-mipi-csi.c | 494 ++++++++++++++++++++++
drivers/media/platform/dwc/dw-mipi-csi.h | 202 +++++++++
include/media/dwc/dw-mipi-csi-pltfrm.h | 102 +++++
8 files changed, 1616 insertions(+), 1 deletion(-)
create mode 100644 drivers/media/platform/dwc/dw-csi-plat.c
create mode 100644 drivers/media/platform/dwc/dw-csi-plat.h
create mode 100644 drivers/media/platform/dwc/dw-mipi-csi.c
create mode 100644 drivers/media/platform/dwc/dw-mipi-csi.h
create mode 100644 include/media/dwc/dw-mipi-csi-pltfrm.h

diff --git a/MAINTAINERS b/MAINTAINERS
index da2e509..fd5f1fc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14032,6 +14032,16 @@ S: Maintained
F: drivers/dma/dwi-axi-dmac/
F: Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt

+SYNOPSYS DESIGNWARE MIPI CSI-2 HOST VIDEO PLATFORM
+M: Luis Oliveira <luis.oliveira@synopsys.com>
+L: linux-media@vger.kernel.org
+T: git git://linuxtv.org/media_tree.git
+S: Maintained
+F: drivers/media/platform/dwc
+F: include/media/dwc/dw-mipi-csi-pltfrm.h
+F: Documentation/devicetree/bindings/media/snps,dw-csi-plat.txt
+F: Documentation/devicetree/bindings/phy/snps,dphy-rx.txt
+
SYNOPSYS DESIGNWARE DMAC DRIVER
M: Viresh Kumar <vireshk@kernel.org>
R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
@@ -16217,3 +16227,4 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
S: Buried alive in reporters
F: *
F: */
+
diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
index 353034c..7c3332c 100644
--- a/drivers/media/platform/dwc/Kconfig
+++ b/drivers/media/platform/dwc/Kconfig
@@ -1,6 +1,34 @@
#
# Synopsys DWC Platform drivers
-# Drivers here are currently for MIPI DPHY support
+# Most drivers here are currently for MIPI CSI-2 and MIPI DPHY support
+
+config DWC_MIPI_CSI2_HOST
+ bool "Synopsys Designware CSI-2 Host Controller and DPHY-RX support"
+ select VIDEO_DEV
+ select VIDEO_V4L2
+ select VIDEO_V4L2_SUBDEV_API
+ select V4L2_FWNODE
+ help
+ This selects the CSI-2 host controller support.
+
+ If you have a controller with this interface, say Y.
+
+ If unsure, say N.
+
+if DWC_MIPI_CSI2_HOST
+
+config DWC_MIPI_CSI2_HOST_PLATFORM
+ tristate "Platform bus based CSI-2 Host Controller support"
+ depends on HAS_DMA
+ help
+ This selects the CSI-2 host controller support. Select this if
+ you have an CSI-2 Host controller on Platform bus.
+
+ If you have a controller with this interface, say Y or M here.
+
+ If unsure, say N.
+
+endif # DWC_MIPI_CSI2_HOST

config DWC_MIPI_DPHY_GEN3
tristate "DesignWare platform support using a Gen3 D-PHY"
diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
index 2573e96..ab0de7d 100644
--- a/drivers/media/platform/dwc/Makefile
+++ b/drivers/media/platform/dwc/Makefile
@@ -1,2 +1,4 @@
obj-$(CONFIG_DWC_MIPI_DPHY_GEN3) += dw-dphy-platfrm.o
dw-dphy-platfrm-objs := dw-dphy-plat.o dw-dphy-rx.o
+obj-$(CONFIG_DWC_MIPI_CSI2_HOST_PLATFORM) += dw-csi-platfrm.o
+dw-csi-platfrm-objs := dw-csi-plat.o dw-mipi-csi.o
diff --git a/drivers/media/platform/dwc/dw-csi-plat.c b/drivers/media/platform/dwc/dw-csi-plat.c
new file mode 100644
index 0000000..fa73738
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-csi-plat.c
@@ -0,0 +1,699 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Synopsys, Inc.
+ *
+ * Synopsys MIPI CSI-2 Host controller driver.
+ * Platform dependent functions
+ *
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ */
+
+#include "dw-csi-plat.h"
+
+static const struct mipi_fmt *
+find_dw_mipi_csi_format(struct v4l2_mbus_framefmt *mf)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(dw_mipi_csi_formats); i++)
+ if (mf->code == dw_mipi_csi_formats[i].code)
+ return &dw_mipi_csi_formats[i];
+ return NULL;
+}
+
+static int dw_mipi_csi_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(dw_mipi_csi_formats))
+ return -EINVAL;
+
+ code->code = dw_mipi_csi_formats[code->index].code;
+ return 0;
+}
+
+static struct mipi_fmt const *
+dw_mipi_csi_try_format(struct v4l2_mbus_framefmt *mf)
+{
+ struct mipi_fmt const *fmt;
+
+ fmt = find_dw_mipi_csi_format(mf);
+ if (fmt == NULL)
+ fmt = &dw_mipi_csi_formats[0];
+
+ mf->code = fmt->code;
+ return fmt;
+}
+
+static struct v4l2_mbus_framefmt *
+dw_mipi_csi_get_format(struct mipi_csi_dev *dev,
+ struct v4l2_subdev_pad_config *cfg,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return cfg ? v4l2_subdev_get_try_format(&dev->sd, cfg,
+ 0) : NULL;
+
+ return &dev->format;
+}
+
+static int
+dw_mipi_csi_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+ struct mipi_fmt const *dev_fmt;
+ struct v4l2_mbus_framefmt *mf;
+ unsigned int i = 0;
+ const struct v4l2_bt_timings *bt_r = &v4l2_dv_timings_presets[0].bt;
+
+ mf = dw_mipi_csi_get_format(dev, cfg, fmt->which);
+
+ dev_fmt = dw_mipi_csi_try_format(&fmt->format);
+ if (dev_fmt) {
+ *mf = fmt->format;
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ dev->fmt = dev_fmt;
+ dw_mipi_csi_set_ipi_fmt(dev);
+ }
+ while (v4l2_dv_timings_presets[i].bt.width) {
+ const struct v4l2_bt_timings *bt =
+ &v4l2_dv_timings_presets[i].bt;
+ if (mf->width == bt->width && mf->height == bt->width) {
+ dw_mipi_csi_fill_timings(dev, bt);
+ return 0;
+ }
+ i++;
+ }
+
+ dw_mipi_csi_fill_timings(dev, bt_r);
+ return 0;
+
+}
+
+static int
+dw_mipi_csi_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+ struct v4l2_mbus_framefmt *mf;
+
+ mf = dw_mipi_csi_get_format(dev, cfg, fmt->which);
+ if (!mf)
+ return -EINVAL;
+
+ mutex_lock(&dev->lock);
+ fmt->format = *mf;
+ mutex_unlock(&dev->lock);
+ return 0;
+}
+
+static int
+dw_mipi_csi_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+
+ if (on) {
+ dw_mipi_csi_hw_stdby(dev);
+ dw_mipi_csi_start(dev);
+ } else {
+ phy_power_off(dev->phy);
+ dw_mipi_csi_mask_irq_power_off(dev);
+ }
+ return 0;
+}
+
+static int
+dw_mipi_csi_init_cfg(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg)
+{
+ struct v4l2_mbus_framefmt *format =
+ v4l2_subdev_get_try_format(sd, cfg, 0);
+
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+ format->code = dw_mipi_csi_formats[0].code;
+ format->width = MIN_WIDTH;
+ format->height = MIN_HEIGHT;
+ format->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static struct v4l2_subdev_core_ops dw_mipi_csi_core_ops = {
+ .s_power = dw_mipi_csi_s_power,
+};
+
+static struct v4l2_subdev_pad_ops dw_mipi_csi_pad_ops = {
+ .init_cfg = dw_mipi_csi_init_cfg,
+ .enum_mbus_code = dw_mipi_csi_enum_mbus_code,
+ .get_fmt = dw_mipi_csi_get_fmt,
+ .set_fmt = dw_mipi_csi_set_fmt,
+};
+
+static struct v4l2_subdev_ops dw_mipi_csi_subdev_ops = {
+ .core = &dw_mipi_csi_core_ops,
+ .pad = &dw_mipi_csi_pad_ops,
+};
+
+static irqreturn_t dw_mipi_csi_irq1(int irq, void *dev_id)
+{
+ struct mipi_csi_dev *csi_dev = dev_id;
+
+ dw_mipi_csi_irq_handler(csi_dev);
+
+ return IRQ_HANDLED;
+}
+
+static int
+dw_mipi_csi_parse_dt(struct platform_device *pdev, struct mipi_csi_dev *dev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct v4l2_fwnode_endpoint endpoint;
+ int ret;
+
+ node = of_graph_get_next_endpoint(node, NULL);
+ if (!node) {
+ dev_err(&pdev->dev, "No port node at %s\n",
+ pdev->dev.of_node->full_name);
+ return -EINVAL;
+ }
+
+ ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &endpoint);
+ if (ret)
+ goto err;
+
+ dev->index = endpoint.base.port - 1;
+ if (dev->index >= CSI_MAX_ENTITIES) {
+ ret = -ENXIO;
+ goto err;
+ }
+ dev->hw.num_lanes = endpoint.bus.mipi_csi2.num_data_lanes;
+
+err:
+ of_node_put(node);
+ return ret;
+}
+
+static ssize_t core_version_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "v.%d.%d*\n", csi_dev->hw_version_major,
+ csi_dev->hw_version_minor);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t n_lanes_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long lanes;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &lanes);
+ if (ret < 0)
+ return ret;
+
+ if (lanes > 8) {
+ dev_err(dev, "Invalid number of lanes %lu\n", lanes);
+ return count;
+ }
+
+ dev_info(dev, "Lanes %lu\n", lanes);
+ csi_dev->hw.num_lanes = lanes;
+
+ return count;
+}
+static ssize_t n_lanes_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.num_lanes);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t core_reset_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ /* Reset Controller and DPHY */
+ phy_reset(csi_dev->phy);
+ dw_mipi_csi_reset(csi_dev);
+
+ snprintf(buffer, 10, "Reset\n");
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t data_type_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long dt;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 16, &dt);
+ if (ret < 0)
+ return ret;
+
+ if ((dt < 0x18) || (dt > 0x2F)) {
+ dev_err(dev, "Invalid data type %lx\n", dt);
+ return count;
+ }
+
+ dev_info(dev, "Data type %lx\n", dt);
+ csi_dev->ipi_dt = dt;
+
+ return count;
+}
+
+static ssize_t data_type_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%x\n", csi_dev->ipi_dt);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t virtual_channel_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long virtual_ch;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &virtual_ch);
+ if (ret < 0)
+ return ret;
+
+ if ((virtual_ch < 0) || (virtual_ch > 8)) {
+ dev_err(dev, "Invalid Virtual Channel %lu\n", virtual_ch);
+ return count;
+ }
+
+ dev_info(dev, "Virtual Channel %lu\n", virtual_ch);
+ csi_dev->hw.virtual_ch = virtual_ch;
+
+ return count;
+}
+
+static ssize_t virtual_channel_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.virtual_ch);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t ipi_color_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long ipi_color_mode;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &ipi_color_mode);
+ if (ret < 0)
+ return ret;
+
+ if ((ipi_color_mode < 0) || (ipi_color_mode > 1)) {
+ dev_err(dev,
+ "Invalid Color Mode %lu, (48 bits -> 0 or 16 bits -> 1\n",
+ ipi_color_mode);
+ return count;
+ }
+
+ dev_info(dev, "IPI Color mode %lu\n", ipi_color_mode);
+ csi_dev->hw.ipi_color_mode = ipi_color_mode;
+
+ return count;
+}
+
+static ssize_t ipi_color_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.ipi_color_mode);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t ipi_auto_flush_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long ipi_auto_flush;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &ipi_auto_flush);
+ if (ret < 0)
+ return ret;
+
+ if ((ipi_auto_flush < 0) || (ipi_auto_flush > 1)) {
+ dev_err(dev,
+ "Invalid Auto Flush Mode %lu, (No -> 0 or Yes -> 1\n",
+ ipi_auto_flush);
+ return count;
+ }
+
+ dev_info(dev, "IPI Auto Flush %lu\n", ipi_auto_flush);
+ csi_dev->hw.ipi_auto_flush = ipi_auto_flush;
+
+ return count;
+}
+
+static ssize_t ipi_auto_flush_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.ipi_auto_flush);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t ipi_timings_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long ipi_mode;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &ipi_mode);
+ if (ret < 0)
+ return ret;
+
+ if ((ipi_mode < 0) || (ipi_mode > 1)) {
+ dev_err(dev,
+ "Invalid Timing Source %lu, (from Camera -> 0 or from Controller -> 1\n",
+ ipi_mode);
+ return count;
+ }
+
+ dev_info(dev, "IPI Color mode %lu\n", ipi_mode);
+ csi_dev->hw.ipi_mode = ipi_mode;
+
+ return count;
+}
+
+static ssize_t ipi_timings_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.ipi_mode);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t output_type_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ unsigned long output;
+
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ ret = kstrtoul(buf, 10, &output);
+ if (ret < 0)
+ return ret;
+
+ if ((output < 0) || (output > 1)) {
+ dev_err(dev,
+ "Invalid Core output %lu to be used (IPI-> 0 or IDI->1 or BOTH- 2\n",
+ output);
+ return count;
+ }
+
+ dev_info(dev, "IPI Color mode %lu\n", output);
+ csi_dev->hw.output = output;
+
+ return count;
+}
+
+static ssize_t output_type_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *csi_dev = sd_to_mipi_csi_dev(sd);
+
+ char buffer[10];
+
+ snprintf(buffer, 10, "%d\n", csi_dev->hw.output);
+
+ return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static DEVICE_ATTR_RO(core_version);
+static DEVICE_ATTR_RO(core_reset);
+static DEVICE_ATTR_RW(n_lanes);
+static DEVICE_ATTR_RW(data_type);
+static DEVICE_ATTR_RW(virtual_channel);
+static DEVICE_ATTR_RW(ipi_color_mode);
+static DEVICE_ATTR_RW(ipi_auto_flush);
+static DEVICE_ATTR_RW(ipi_timings_mode);
+static DEVICE_ATTR_RW(output_type);
+
+static const struct of_device_id dw_mipi_csi_of_match[];
+
+static int csi_plat_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_id;
+ struct device *dev = &pdev->dev;
+ struct resource *res = NULL;
+ struct mipi_csi_dev *mipi_csi;
+ int ret = -ENOMEM;
+
+ mipi_csi = devm_kzalloc(dev, sizeof(*mipi_csi), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ mutex_init(&mipi_csi->lock);
+ spin_lock_init(&mipi_csi->slock);
+ mipi_csi->dev = dev;
+
+ of_id = of_match_node(dw_mipi_csi_of_match, dev->of_node);
+ if (WARN_ON(of_id == NULL))
+ return -EINVAL;
+
+ ret = dw_mipi_csi_parse_dt(pdev, mipi_csi);
+ if (ret < 0)
+ return ret;
+
+ mipi_csi->phy = devm_of_phy_get(dev, dev->of_node, NULL);
+ if (IS_ERR(mipi_csi->phy)) {
+ dev_err(dev, "No DPHY available\n");
+ return PTR_ERR(mipi_csi->phy);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mipi_csi->base_address = devm_ioremap_resource(dev, res);
+
+ if (IS_ERR(mipi_csi->base_address)) {
+ dev_err(dev, "Base address not set.\n");
+ return PTR_ERR(mipi_csi->base_address);
+ }
+
+ mipi_csi->ctrl_irq_number = platform_get_irq(pdev, 0);
+ if (mipi_csi->ctrl_irq_number <= 0) {
+ dev_err(dev, "IRQ number not set.\n");
+ return mipi_csi->ctrl_irq_number;
+ }
+
+ mipi_csi->rst = devm_reset_control_get_optional_shared(dev, NULL);
+ if (IS_ERR(mipi_csi->rst)) {
+ ret = PTR_ERR(mipi_csi->rst);
+ dev_err(dev, "error getting reset control %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_request_irq(dev, mipi_csi->ctrl_irq_number,
+ dw_mipi_csi_irq1, IRQF_SHARED,
+ dev_name(dev), mipi_csi);
+ if (ret) {
+ dev_err(dev, "IRQ failed\n");
+ goto end;
+ }
+
+ v4l2_subdev_init(&mipi_csi->sd, &dw_mipi_csi_subdev_ops);
+ mipi_csi->sd.owner = THIS_MODULE;
+ snprintf(mipi_csi->sd.name, sizeof(mipi_csi->sd.name), "%s.%d",
+ CSI_HOST_NAME, mipi_csi->index);
+ mipi_csi->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ mipi_csi->fmt = &dw_mipi_csi_formats[0];
+
+ mipi_csi->format.code = dw_mipi_csi_formats[0].code;
+ mipi_csi->format.width = MIN_WIDTH;
+ mipi_csi->format.height = MIN_HEIGHT;
+
+ mipi_csi->sd.entity.function = MEDIA_ENT_F_IO_V4L;
+ mipi_csi->pads[CSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ mipi_csi->pads[CSI_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&mipi_csi->sd.entity,
+ CSI_PADS_NUM, mipi_csi->pads);
+
+ if (ret < 0) {
+ dev_err(dev, "Media Entity init failed\n");
+ goto entity_cleanup;
+ }
+
+ v4l2_set_subdevdata(&mipi_csi->sd, pdev);
+
+ platform_set_drvdata(pdev, &mipi_csi->sd);
+
+ device_create_file(&pdev->dev, &dev_attr_core_version);
+ device_create_file(&pdev->dev, &dev_attr_core_reset);
+ device_create_file(&pdev->dev, &dev_attr_n_lanes);
+ device_create_file(&pdev->dev, &dev_attr_data_type);
+ device_create_file(&pdev->dev, &dev_attr_virtual_channel);
+ device_create_file(&pdev->dev, &dev_attr_ipi_color_mode);
+ device_create_file(&pdev->dev, &dev_attr_ipi_auto_flush);
+ device_create_file(&pdev->dev, &dev_attr_ipi_timings_mode);
+ device_create_file(&pdev->dev, &dev_attr_output_type);
+
+ if (mipi_csi->rst)
+ reset_control_deassert(mipi_csi->rst);
+
+ dw_mipi_csi_get_version(mipi_csi);
+ dw_mipi_csi_specific_mappings(mipi_csi);
+ dw_mipi_csi_mask_irq_power_off(mipi_csi);
+
+ dev_info(dev, "DW MIPI CSI-2 Host registered successfully HW v%u.%u\n",
+ mipi_csi->hw_version_major, mipi_csi->hw_version_minor);
+ return 0;
+
+entity_cleanup:
+ media_entity_cleanup(&mipi_csi->sd.entity);
+end:
+ return ret;
+}
+
+/**
+ * @short Exit routine - Exit point of the driver
+ * @param[in] pdev pointer to the platform device structure
+ * @return 0 on success and a negative number on failure
+ * Refer to Linux errors.
+ */
+static int csi_plat_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct mipi_csi_dev *mipi_csi = sd_to_mipi_csi_dev(sd);
+
+ dev_dbg(&pdev->dev, "Removing MIPI CSI-2 module\n");
+
+ if (mipi_csi->rst)
+ reset_control_assert(mipi_csi->rst);
+
+ media_entity_cleanup(&mipi_csi->sd.entity);
+
+ return 0;
+}
+
+/**
+ * @short of_device_id structure
+ */
+static const struct of_device_id dw_mipi_csi_of_match[] = {
+ {
+ .compatible = "snps,dw-csi-plat"},
+ { /* sentinel */ },
+};
+
+MODULE_DEVICE_TABLE(of, dw_mipi_csi_of_match);
+
+/**
+ * @short Platform driver structure
+ */
+static struct platform_driver __refdata dw_mipi_csi_pdrv = {
+ .remove = csi_plat_remove,
+ .probe = csi_plat_probe,
+ .driver = {
+ .name = CSI_HOST_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = dw_mipi_csi_of_match,
+ },
+};
+
+module_platform_driver(dw_mipi_csi_pdrv);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Luis Oliveira <lolivei@synopsys.com>");
+MODULE_DESCRIPTION("Synopsys DesignWare MIPI CSI-2 Host Platform driver");
diff --git a/drivers/media/platform/dwc/dw-csi-plat.h b/drivers/media/platform/dwc/dw-csi-plat.h
new file mode 100644
index 0000000..e806edd
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-csi-plat.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 Synopsys, Inc.
+ *
+ * Synopsys MIPI CSI-2 Host controller driver.
+ * Platform dependent functions
+ *
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ */
+
+#ifndef _DW_CSI_PLAT_H__
+#define _DW_CSI_PLAT_H__
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/ratelimit.h>
+#include <linux/reset.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#include "dw-mipi-csi.h"
+
+#define CSI_HOST_NAME "dw-mipi-csi"
+
+/* Video formats supported by the MIPI CSI-2 */
+const struct mipi_fmt dw_mipi_csi_formats[] = {
+ {
+ /* RAW 8 */
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .depth = 8,
+ },
+ {
+ /* RAW 10 */
+ .code = MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE,
+ .depth = 10,
+ },
+ {
+ /* RGB 565 */
+ .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
+ .depth = 16,
+ },
+ {
+ /* BGR 565 */
+ .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .depth = 16,
+ },
+ {
+ /* RGB 888 */
+ .code = MEDIA_BUS_FMT_RGB888_2X12_LE,
+ .depth = 24,
+ },
+ {
+ /* BGR 888 */
+ .code = MEDIA_BUS_FMT_RGB888_2X12_BE,
+ .depth = 24,
+ },
+};
+
+static inline struct mipi_csi_dev *sd_to_mipi_csi_dev(struct v4l2_subdev *sdev)
+{
+ return container_of(sdev, struct mipi_csi_dev, sd);
+}
+
+#endif /* _DW_CSI_PLAT_H__ */
diff --git a/drivers/media/platform/dwc/dw-mipi-csi.c b/drivers/media/platform/dwc/dw-mipi-csi.c
new file mode 100644
index 0000000..2d19f18
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-mipi-csi.c
@@ -0,0 +1,494 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Synopsys, Inc.
+ *
+ * Synopsys MIPI CSI-2 Host controller driver
+ *
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ */
+
+#include "dw-mipi-csi.h"
+
+static struct R_CSI2 reg = {
+ .VERSION = 0x00,
+ .N_LANES = 0x04,
+ .CTRL_RESETN = 0x08,
+ .INTERRUPT = 0x0C,
+ .DATA_IDS_1 = 0x10,
+ .DATA_IDS_2 = 0x14,
+ .IPI_MODE = 0x80,
+ .IPI_VCID = 0x84,
+ .IPI_DATA_TYPE = 0x88,
+ .IPI_MEM_FLUSH = 0x8C,
+ .IPI_HSA_TIME = 0x90,
+ .IPI_HBP_TIME = 0x94,
+ .IPI_HSD_TIME = 0x98,
+ .IPI_HLINE_TIME = 0x9C,
+ .IPI_SOFTRSTN = 0xA0,
+ .IPI_ADV_FEATURES = 0xAC,
+ .IPI_VSA_LINES = 0xB0,
+ .IPI_VBP_LINES = 0xB4,
+ .IPI_VFP_LINES = 0xB8,
+ .IPI_VACTIVE_LINES = 0xBC,
+ .INT_PHY_FATAL = 0xe0,
+ .MASK_INT_PHY_FATAL = 0xe4,
+ .FORCE_INT_PHY_FATAL = 0xe8,
+ .INT_PKT_FATAL = 0xf0,
+ .MASK_INT_PKT_FATAL = 0xf4,
+ .FORCE_INT_PKT_FATAL = 0xf8,
+ .INT_PHY = 0x110,
+ .MASK_INT_PHY = 0x114,
+ .FORCE_INT_PHY = 0x118,
+ .INT_LINE = 0x130,
+ .MASK_INT_LINE = 0x134,
+ .FORCE_INT_LINE = 0x138,
+ .INT_IPI = 0x140,
+ .MASK_INT_IPI = 0x144,
+ .FORCE_INT_IPI = 0x148,
+};
+struct interrupt_type csi_int = {
+ .PHY_FATAL = BIT(0),
+ .PKT_FATAL = BIT(1),
+ .PHY = BIT(16),
+};
+static void dw_mipi_csi_write(struct mipi_csi_dev *dev,
+ unsigned int address, unsigned int data)
+{
+ iowrite32(data, dev->base_address + address);
+}
+
+static u32 dw_mipi_csi_read(struct mipi_csi_dev *dev, unsigned long address)
+{
+ return ioread32(dev->base_address + address);
+}
+
+void dw_mipi_csi_write_part(struct mipi_csi_dev *dev,
+ unsigned long address, unsigned long data,
+ unsigned char shift, unsigned char width)
+{
+ u32 mask = (1 << width) - 1;
+ u32 temp = dw_mipi_csi_read(dev, address);
+
+ temp &= ~(mask << shift);
+ temp |= (data & mask) << shift;
+ dw_mipi_csi_write(dev, address, temp);
+}
+
+void dw_mipi_csi_reset(struct mipi_csi_dev *csi_dev)
+{
+ dw_mipi_csi_write(csi_dev, reg.CTRL_RESETN, 0);
+ usleep_range(100, 200);
+ dw_mipi_csi_write(csi_dev, reg.CTRL_RESETN, 1);
+}
+
+int dw_mipi_csi_mask_irq_power_off(struct mipi_csi_dev *csi_dev)
+{
+ if ((csi_dev->hw_version_major) == 1) {
+
+ /* set only one lane (lane 0) as active (ON) */
+ dw_mipi_csi_write(csi_dev, reg.N_LANES, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PHY_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PKT_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PHY, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PKT, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_LINE, 0);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_IPI, 0);
+
+ /* only for version 1.30 */
+ if ((csi_dev->hw_version_minor) == 30)
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_FRAME_FATAL, 0);
+
+ dw_mipi_csi_write(csi_dev, reg.CTRL_RESETN, 0);
+
+ /* only for version 1.40 */
+ if ((csi_dev->hw_version_minor) == 40) {
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_BNDRY_FRAME_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MSK_SEQ_FRAME_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MSK_CRC_FRAME_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MSK_PLD_CRC_FATAL, 0);
+ dw_mipi_csi_write(csi_dev, reg.MSK_DATA_ID, 0);
+ dw_mipi_csi_write(csi_dev, reg.MSK_ECC_CORRECT, 0);
+ }
+ }
+
+ return 0;
+}
+
+int dw_mipi_csi_hw_stdby(struct mipi_csi_dev *csi_dev)
+{
+ if ((csi_dev->hw_version_major) == 1) {
+
+ /* set only one lane (lane 0) as active (ON) */
+ dw_mipi_csi_reset(csi_dev);
+ dw_mipi_csi_write(csi_dev, reg.N_LANES, 0);
+ phy_init(csi_dev->phy);
+
+ /* only for version 1.30 */
+ if ((csi_dev->hw_version_minor) == 30)
+ dw_mipi_csi_write(csi_dev,
+ reg.MASK_INT_FRAME_FATAL, 0xFFFFFFFF);
+
+ /* common */
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PHY_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PKT_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PHY, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_PKT, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_LINE, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MASK_INT_IPI, 0xFFFFFFFF);
+
+ /* only for version 1.40 */
+ if ((csi_dev->hw_version_minor) == 40) {
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_BNDRY_FRAME_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_SEQ_FRAME_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_CRC_FRAME_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_PLD_CRC_FATAL, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev, reg.MSK_DATA_ID, 0xFFFFFFFF);
+ dw_mipi_csi_write(csi_dev,
+ reg.MSK_ECC_CORRECT, 0xFFFFFFFF);
+ }
+ }
+ return 0;
+}
+
+void dw_mipi_csi_set_ipi_fmt(struct mipi_csi_dev *csi_dev)
+{
+ struct device *dev = csi_dev->dev;
+
+ if (csi_dev->ipi_dt)
+ dw_mipi_csi_write(csi_dev, reg.IPI_DATA_TYPE, csi_dev->ipi_dt);
+ else {
+ switch (csi_dev->fmt->code) {
+ case MEDIA_BUS_FMT_RGB565_2X8_BE:
+ case MEDIA_BUS_FMT_RGB565_2X8_LE:
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_DATA_TYPE, CSI_2_RGB565);
+ dev_dbg(dev, "DT: RGB 565");
+ break;
+
+ case MEDIA_BUS_FMT_RGB888_2X12_LE:
+ case MEDIA_BUS_FMT_RGB888_2X12_BE:
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_DATA_TYPE, CSI_2_RGB888);
+ dev_dbg(dev, "DT: RGB 888");
+ break;
+ case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_DATA_TYPE, CSI_2_RAW10);
+ dev_dbg(dev, "DT: RAW 10");
+ break;
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_DATA_TYPE, CSI_2_RAW8);
+ dev_dbg(dev, "DT: RAW 8");
+ break;
+ default:
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_DATA_TYPE, CSI_2_RGB565);
+ dev_dbg(dev, "Error");
+ break;
+ }
+ }
+}
+
+void dw_mipi_csi_fill_timings(struct mipi_csi_dev *dev,
+ const struct v4l2_bt_timings *bt)
+{
+ if (bt == NULL)
+ return;
+ dev->hw.virtual_ch = 0;
+ dev->hw.ipi_color_mode = 0;
+ dev->hw.ipi_auto_flush = 1;
+ dev->hw.ipi_mode = 0;
+ dev->hw.hsa = bt->hsync;
+ dev->hw.hbp = bt->hbackporch;
+ dev->hw.hsd = bt->hsync;
+ dev->hw.htotal = bt->height + bt->vfrontporch +
+ bt->vsync + bt->vbackporch;
+ dev->hw.vsa = bt->vsync;
+ dev->hw.vbp = bt->vbackporch;
+ dev->hw.vfp = bt->vfrontporch;
+ dev->hw.vactive = bt->height;
+ dev->hw.output = 2;
+}
+
+void dw_mipi_csi_start(struct mipi_csi_dev *csi_dev)
+{
+ const struct v4l2_bt_timings *bt = &v4l2_dv_timings_presets[0].bt;
+ struct device *dev = csi_dev->dev;
+
+ dw_mipi_csi_fill_timings(csi_dev, bt);
+ dw_mipi_csi_write(csi_dev, reg.N_LANES, (csi_dev->hw.num_lanes - 1));
+ dev_dbg(dev, "N Lanes: %d\n", csi_dev->hw.num_lanes);
+
+ /* IPI Related Configuration */
+ if ((csi_dev->hw.output == IPI_OUT)
+ || (csi_dev->hw.output == BOTH_OUT)) {
+
+ if (csi_dev->hw_version_major >= 1) {
+ if (csi_dev->hw_version_minor >= 20)
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_ADV_FEATURES, 0x30000);
+
+ if (csi_dev->hw_version_minor >= 30)
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_SOFTRSTN, 0x1);
+ }
+ /* address | data, | shift | width */
+ dw_mipi_csi_write_part(csi_dev, reg.IPI_MODE, 1, 24, 1);
+ dw_mipi_csi_write_part(csi_dev,
+ reg.IPI_MODE,
+ csi_dev->hw.ipi_mode,
+ 0, 1);
+
+ dw_mipi_csi_write_part(csi_dev,
+ reg.IPI_MODE,
+ csi_dev->hw.ipi_color_mode,
+ 8, 1);
+
+ dw_mipi_csi_write_part(csi_dev,
+ reg.IPI_VCID,
+ csi_dev->hw.virtual_ch,
+ 0, 2);
+
+ dw_mipi_csi_write_part(csi_dev,
+ reg.IPI_MEM_FLUSH,
+ csi_dev->hw.ipi_auto_flush,
+ 8, 1);
+
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_HSA_TIME, csi_dev->hw.hsa);
+
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_HBP_TIME, csi_dev->hw.hbp);
+
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_HSD_TIME, csi_dev->hw.hsd);
+
+ dev_dbg(dev, "IPI enable\n");
+ dev_dbg(dev, "IPI MODE: %d\n", csi_dev->hw.ipi_mode);
+ dev_dbg(dev, "Color Mode: %d\n", csi_dev->hw.ipi_color_mode);
+ dev_dbg(dev, "Virtual Channel: %d\n", csi_dev->hw.virtual_ch);
+ dev_dbg(dev, "Auto-flush: %d\n", csi_dev->hw.ipi_auto_flush);
+ dev_dbg(dev, "HSA: %d\n", csi_dev->hw.hsa);
+ dev_dbg(dev, "HBP: %d\n", csi_dev->hw.hbp);
+ dev_dbg(dev, "HSD: %d\n", csi_dev->hw.hsd);
+
+ if (csi_dev->hw.ipi_mode == AUTO_TIMING) {
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_HLINE_TIME, csi_dev->hw.htotal);
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_VSA_LINES, csi_dev->hw.vsa);
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_VBP_LINES, csi_dev->hw.vbp);
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_VFP_LINES, csi_dev->hw.vfp);
+ dw_mipi_csi_write(csi_dev,
+ reg.IPI_VACTIVE_LINES, csi_dev->hw.vactive);
+ dev_dbg(dev,
+ "Horizontal Total: %d\n", csi_dev->hw.htotal);
+ dev_dbg(dev,
+ "Vertical Sync Active: %d\n", csi_dev->hw.vsa);
+ dev_dbg(dev,
+ "Vertical Back Porch: %d\n", csi_dev->hw.vbp);
+ dev_dbg(dev,
+ "Vertical Front Porch: %d\n", csi_dev->hw.vfp);
+ dev_dbg(dev,
+ "Vertical Active: %d\n", csi_dev->hw.vactive);
+ }
+ }
+ phy_power_on(csi_dev->phy);
+}
+
+int dw_mipi_csi_irq_handler(struct mipi_csi_dev *csi_dev)
+{
+ struct device *dev = csi_dev->dev;
+ u32 global_int_status, i_sts;
+ unsigned long flags;
+
+ global_int_status = dw_mipi_csi_read(csi_dev, reg.INTERRUPT);
+ spin_lock_irqsave(&csi_dev->slock, flags);
+
+ if (global_int_status & csi_int.PHY_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_PHY_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: PHY FATAL: %08X\n",
+ reg.INT_PHY_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.PKT_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_PKT_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: PKT FATAL: %08X\n",
+ reg.INT_PKT_FATAL, i_sts);
+ }
+
+ if ((global_int_status & csi_int.FRAME_FATAL)
+ && ((csi_dev->hw_version_major) == 1)
+ && ((csi_dev->hw_version_minor) == 30)) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_FRAME_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: FRAME FATAL: %08X\n",
+ reg.INT_FRAME_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.PHY) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_PHY);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: PHY: %08X\n",
+ reg.INT_PHY, i_sts);
+ }
+
+ if (global_int_status & csi_int.PKT) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_PKT);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: PKT: %08X\n",
+ reg.INT_PKT, i_sts);
+ }
+
+ if (global_int_status & csi_int.LINE) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_LINE);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: LINE: %08X\n",
+ reg.INT_LINE, i_sts);
+ }
+
+ if (global_int_status & csi_int.IPI) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.INT_IPI);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: IPI: %08X\n",
+ reg.INT_IPI, i_sts);
+ }
+
+ if (global_int_status & csi_int.BNDRY_FRAME_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_BNDRY_FRAME_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_BNDRY_FRAME_FATAL: %08X\n",
+ reg.ST_BNDRY_FRAME_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.SEQ_FRAME_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_SEQ_FRAME_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_SEQ_FRAME_FATAL: %08X\n",
+ reg.ST_SEQ_FRAME_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.CRC_FRAME_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_CRC_FRAME_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_CRC_FRAME_FATAL: %08X\n",
+ reg.ST_CRC_FRAME_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.PLD_CRC_FATAL) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_PLD_CRC_FATAL);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_PLD_CRC_FATAL: %08X\n",
+ reg.ST_PLD_CRC_FATAL, i_sts);
+ }
+
+ if (global_int_status & csi_int.DATA_ID) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_DATA_ID);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_DATA_ID: %08X\n",
+ reg.ST_DATA_ID, i_sts);
+ }
+
+ if (global_int_status & csi_int.ECC_CORRECTED) {
+ i_sts = dw_mipi_csi_read(csi_dev, reg.ST_ECC_CORRECT);
+ dev_err_ratelimited(dev,
+ "interrupt %08X: ST_ECC_CORRECT: %08X\n",
+ reg.ST_ECC_CORRECT, i_sts);
+ }
+
+ spin_unlock_irqrestore(&csi_dev->slock, flags);
+
+ return 1;
+}
+
+void dw_mipi_csi_get_version(struct mipi_csi_dev *csi_dev)
+{
+ uint32_t hw_version;
+
+ hw_version = dw_mipi_csi_read(csi_dev, reg.VERSION);
+ csi_dev->hw_version_major = (uint8_t) ((hw_version >> 24) - '0');
+ csi_dev->hw_version_minor = (uint8_t) ((hw_version >> 16) - '0');
+ csi_dev->hw_version_minor = csi_dev->hw_version_minor * 10;
+ csi_dev->hw_version_minor += (uint8_t) ((hw_version >> 8) - '0');
+}
+
+int dw_mipi_csi_specific_mappings(struct mipi_csi_dev *csi_dev)
+{
+ struct device *dev = csi_dev->dev;
+
+ if ((csi_dev->hw_version_major) == 1)
+ if ((csi_dev->hw_version_minor) == 30) {
+
+ dev_dbg(dev, "We are version 30");
+ /*
+ * Hardware registers that were
+ * exclusive to version < 1.40
+ */
+ reg.INT_FRAME_FATAL = 0x100;
+ reg.MASK_INT_FRAME_FATAL = 0x104;
+ reg.FORCE_INT_FRAME_FATAL = 0x108;
+ reg.INT_PKT = 0x120;
+ reg.MASK_INT_PKT = 0x124;
+ reg.FORCE_INT_PKT = 0x128;
+
+ /* interrupt source present until this release */
+ csi_int.PKT = BIT(17);
+ csi_int.LINE = BIT(18);
+ csi_int.IPI = BIT(19);
+ csi_int.FRAME_FATAL = BIT(2);
+
+ } else if ((csi_dev->hw_version_minor) == 40) {
+ dev_dbg(dev, "We are version 40");
+ /*
+ * HW registers that were added
+ * to version 1.40
+ */
+ reg.ST_BNDRY_FRAME_FATAL = 0x280;
+ reg.MSK_BNDRY_FRAME_FATAL = 0x284;
+ reg.FORCE_BNDRY_FRAME_FATAL = 0x288;
+ reg.ST_SEQ_FRAME_FATAL = 0x290;
+ reg.MSK_SEQ_FRAME_FATAL = 0x294;
+ reg.FORCE_SEQ_FRAME_FATAL = 0x298;
+ reg.ST_CRC_FRAME_FATAL = 0x2a0;
+ reg.MSK_CRC_FRAME_FATAL = 0x2a4;
+ reg.FORCE_CRC_FRAME_FATAL = 0x2a8;
+ reg.ST_PLD_CRC_FATAL = 0x2b0;
+ reg.MSK_PLD_CRC_FATAL = 0x2b4;
+ reg.FORCE_PLD_CRC_FATAL = 0x2b8;
+ reg.ST_DATA_ID = 0x2c0;
+ reg.MSK_DATA_ID = 0x2c4;
+ reg.FORCE_DATA_ID = 0x2c8;
+ reg.ST_ECC_CORRECT = 0x2d0;
+ reg.MSK_ECC_CORRECT = 0x2d4;
+ reg.FORCE_ECC_CORRECT = 0x2d8;
+ reg.DATA_IDS_VC_1 = 0x0;
+ reg.DATA_IDS_VC_2 = 0x0;
+ reg.VC_EXTENSION = 0x0;
+
+ /* interrupts map were changed */
+ csi_int.LINE = BIT(17);
+ csi_int.IPI = BIT(18);
+ csi_int.BNDRY_FRAME_FATAL = BIT(2);
+ csi_int.SEQ_FRAME_FATAL = BIT(3);
+ csi_int.CRC_FRAME_FATAL = BIT(4);
+ csi_int.PLD_CRC_FATAL = BIT(5);
+ csi_int.DATA_ID = BIT(6);
+ csi_int.ECC_CORRECTED = BIT(7);
+
+ } else
+ dev_info(dev, "Version minor not supported.");
+ else
+ dev_info(dev, "Version major not supported.");
+
+ return 0;
+}
diff --git a/drivers/media/platform/dwc/dw-mipi-csi.h b/drivers/media/platform/dwc/dw-mipi-csi.h
new file mode 100644
index 0000000..b7163f3
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-mipi-csi.h
@@ -0,0 +1,202 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Synopsys, Inc.
+ *
+ * Synopsys MIPI CSI-2 Host controller driver
+ *
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ */
+
+#ifndef _DW_MIPI_CSI_H__
+#define _DW_MIPI_CSI_H__
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/phy/phy.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/dwc/dw-mipi-csi-pltfrm.h>
+
+/* DW MIPI CSI-2 register addresses*/
+
+struct R_CSI2 {
+ u16 VERSION;
+ u16 N_LANES;
+ u16 CTRL_RESETN;
+ u16 INTERRUPT;
+ u16 DATA_IDS_1;
+ u16 DATA_IDS_2;
+ u16 DATA_IDS_VC_1;
+ u16 DATA_IDS_VC_2;
+ u16 IPI_MODE;
+ u16 IPI_VCID;
+ u16 IPI_DATA_TYPE;
+ u16 IPI_MEM_FLUSH;
+ u16 IPI_HSA_TIME;
+ u16 IPI_HBP_TIME;
+ u16 IPI_HSD_TIME;
+ u16 IPI_HLINE_TIME;
+ u16 IPI_SOFTRSTN;
+ u16 IPI_ADV_FEATURES;
+ u16 IPI_VSA_LINES;
+ u16 IPI_VBP_LINES;
+ u16 IPI_VFP_LINES;
+ u16 IPI_VACTIVE_LINES;
+ u16 VC_EXTENSION;
+ u16 INT_PHY_FATAL;
+ u16 MASK_INT_PHY_FATAL;
+ u16 FORCE_INT_PHY_FATAL;
+ u16 INT_PKT_FATAL;
+ u16 MASK_INT_PKT_FATAL;
+ u16 FORCE_INT_PKT_FATAL;
+ u16 INT_FRAME_FATAL;
+ u16 MASK_INT_FRAME_FATAL;
+ u16 FORCE_INT_FRAME_FATAL;
+ u16 INT_PHY;
+ u16 MASK_INT_PHY;
+ u16 FORCE_INT_PHY;
+ u16 INT_PKT;
+ u16 MASK_INT_PKT;
+ u16 FORCE_INT_PKT;
+ u16 INT_LINE;
+ u16 MASK_INT_LINE;
+ u16 FORCE_INT_LINE;
+ u16 INT_IPI;
+ u16 MASK_INT_IPI;
+ u16 FORCE_INT_IPI;
+ u16 ST_BNDRY_FRAME_FATAL;
+ u16 MSK_BNDRY_FRAME_FATAL;
+ u16 FORCE_BNDRY_FRAME_FATAL;
+ u16 ST_SEQ_FRAME_FATAL;
+ u16 MSK_SEQ_FRAME_FATAL;
+ u16 FORCE_SEQ_FRAME_FATAL;
+ u16 ST_CRC_FRAME_FATAL;
+ u16 MSK_CRC_FRAME_FATAL;
+ u16 FORCE_CRC_FRAME_FATAL;
+ u16 ST_PLD_CRC_FATAL;
+ u16 MSK_PLD_CRC_FATAL;
+ u16 FORCE_PLD_CRC_FATAL;
+ u16 ST_DATA_ID;
+ u16 MSK_DATA_ID;
+ u16 FORCE_DATA_ID;
+ u16 ST_ECC_CORRECT;
+ u16 MSK_ECC_CORRECT;
+ u16 FORCE_ECC_CORRECT;
+};
+/* Interrupt Masks */
+struct interrupt_type {
+ u32 PHY_FATAL;
+ u32 PKT_FATAL;
+ u32 FRAME_FATAL;
+ u32 PHY;
+ u32 PKT;
+ u32 LINE;
+ u32 IPI;
+ u32 BNDRY_FRAME_FATAL;
+ u32 SEQ_FRAME_FATAL;
+ u32 CRC_FRAME_FATAL;
+ u32 PLD_CRC_FATAL;
+ u32 DATA_ID;
+ u32 ECC_CORRECTED;
+};
+
+/* IPI Data Types */
+enum data_type {
+ CSI_2_YUV420_8 = 0x18,
+ CSI_2_YUV420_10 = 0x19,
+ CSI_2_YUV420_8_LEG = 0x1A,
+ CSI_2_YUV420_8_SHIFT = 0x1C,
+ CSI_2_YUV420_10_SHIFT = 0x1D,
+ CSI_2_YUV422_8 = 0x1E,
+ CSI_2_YUV422_10 = 0x1F,
+ CSI_2_RGB444 = 0x20,
+ CSI_2_RGB555 = 0x21,
+ CSI_2_RGB565 = 0x22,
+ CSI_2_RGB666 = 0x23,
+ CSI_2_RGB888 = 0x24,
+ CSI_2_RAW6 = 0x28,
+ CSI_2_RAW7 = 0x29,
+ CSI_2_RAW8 = 0x2A,
+ CSI_2_RAW10 = 0x2B,
+ CSI_2_RAW12 = 0x2C,
+ CSI_2_RAW14 = 0x2D,
+};
+
+/* DWC MIPI CSI-2 output types */
+enum output {
+ IPI_OUT = 0,
+ IDI_OUT = 1,
+ BOTH_OUT = 2
+};
+
+/* IPI output types */
+enum ipi_output {
+ CAMERA_TIMING = 0,
+ AUTO_TIMING = 1
+};
+
+/* Format template */
+struct mipi_fmt {
+ u32 code;
+ u8 depth;
+};
+
+/* CSI specific configuration */
+struct csi_hw {
+
+ uint32_t num_lanes;
+ uint32_t output;
+ uint32_t ipi_mode;
+ uint32_t ipi_color_mode;
+ uint32_t ipi_auto_flush;
+ uint32_t virtual_ch;
+ uint32_t hsa;
+ uint32_t hbp;
+ uint32_t hsd;
+ uint32_t htotal;
+ uint32_t vsa;
+ uint32_t vbp;
+ uint32_t vfp;
+ uint32_t vactive;
+};
+
+/* Structure to embed device driver information */
+struct mipi_csi_dev {
+ struct v4l2_subdev sd;
+ struct video_device vdev;
+ struct device *dev;
+
+ struct mutex lock;
+ spinlock_t slock;
+ struct media_pad pads[CSI_PADS_NUM];
+ u8 index;
+
+ /* Store current format */
+ const struct mipi_fmt *fmt;
+ struct v4l2_mbus_framefmt format;
+
+ /* Device Tree Information */
+ void __iomem *base_address;
+ uint32_t ctrl_irq_number;
+
+ struct csi_hw hw;
+ struct phy *phy;
+ struct reset_control *rst;
+
+ u8 ipi_dt;
+ u8 hw_version_major;
+ u16 hw_version_minor;
+};
+
+void dw_mipi_csi_reset(struct mipi_csi_dev *csi_dev);
+int dw_mipi_csi_mask_irq_power_off(struct mipi_csi_dev *csi_dev);
+int dw_mipi_csi_hw_stdby(struct mipi_csi_dev *csi_dev);
+void dw_mipi_csi_set_ipi_fmt(struct mipi_csi_dev *csi_dev);
+void dw_mipi_csi_start(struct mipi_csi_dev *csi_dev);
+int dw_mipi_csi_irq_handler(struct mipi_csi_dev *csi_dev);
+void dw_mipi_csi_get_version(struct mipi_csi_dev *csi_dev);
+int dw_mipi_csi_specific_mappings(struct mipi_csi_dev *csi_dev);
+void dw_mipi_csi_fill_timings(struct mipi_csi_dev *dev,
+ const struct v4l2_bt_timings *bt);
+
+#endif /*_DW_MIPI_CSI_H__ */
diff --git a/include/media/dwc/dw-mipi-csi-pltfrm.h b/include/media/dwc/dw-mipi-csi-pltfrm.h
new file mode 100644
index 0000000..c36f206
--- /dev/null
+++ b/include/media/dwc/dw-mipi-csi-pltfrm.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 Synopsys, Inc.
+ *
+ * Synopsys MIPI CSI-2 video platform helper
+ *
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ *
+ */
+
+#ifndef __DW_MIPI_CSI_PLTFRM_INCLUDES_H_
+#define __DW_MIPI_CSI_PLTFRM_INCLUDES_H_
+
+#include <media/media-entity.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-mediabus.h>
+#include <media/v4l2-subdev.h>
+
+#define MAX_WIDTH 3280
+#define MAX_HEIGHT 1852
+#define MIN_WIDTH 640
+#define MIN_HEIGHT 480
+
+/* The subdevices' group IDs. */
+#define GRP_ID_SENSOR (10)
+#define GRP_ID_CSI (20)
+#define GRP_ID_VIF (30)
+#define GRP_ID_VIDEODEV (40)
+
+#define CSI_MAX_ENTITIES (2)
+#define VIF_MAX_ENTITIES (2)
+#define PLAT_MAX_SENSORS (2)
+
+enum video_dev_pads {
+ VIDEO_DEV_SD_PAD_SINK_VIF1 = 0,
+ VIDEO_DEV_SD_PAD_SINK_VIF2 = 1,
+ VIDEO_DEV_SD_PAD_SOURCE_DMA = 2,
+ VIDEO_DEV_SD_PADS_NUM = 3,
+};
+enum vif_pads {
+ VIF_PAD_SINK_CSI = 0,
+ VIF_PAD_SOURCE_DMA = 1,
+ VIF_PADS_NUM = 2,
+};
+
+enum mipi_csi_pads {
+ CSI_PAD_SINK = 0,
+ CSI_PAD_SOURCE = 1,
+ CSI_PADS_NUM = 2,
+};
+
+struct plat_csi_source_info {
+ u16 flags;
+ u16 mux_id;
+};
+
+struct plat_csi_fmt {
+ char *name;
+ u32 mbus_code;
+ u32 fourcc;
+ u8 depth;
+};
+
+struct plat_csi_media_pipeline;
+
+/*
+ * Media pipeline operations to be called from within a video node, i.e. the
+ * last entity within the pipeline. Implemented by related media device driver.
+ */
+struct plat_csi_media_pipeline_ops {
+ int (*prepare)(struct plat_csi_media_pipeline *p,
+ struct media_entity *me);
+ int (*unprepare)(struct plat_csi_media_pipeline *p);
+ int (*open)(struct plat_csi_media_pipeline *p, struct media_entity *me,
+ bool resume);
+ int (*close)(struct plat_csi_media_pipeline *p);
+ int (*set_stream)(struct plat_csi_media_pipeline *p, bool state);
+ int (*set_format)(struct plat_csi_media_pipeline *p,
+ struct v4l2_subdev_format *fmt);
+};
+
+struct plat_csi_video_entity {
+ struct video_device vdev;
+ struct plat_csi_media_pipeline *pipe;
+};
+
+struct plat_csi_media_pipeline {
+ struct media_pipeline mp;
+ const struct plat_csi_media_pipeline_ops *ops;
+};
+
+static inline struct plat_csi_video_entity
+*vdev_to_plat_csi_video_entity(struct video_device *vdev)
+{
+ return container_of(vdev, struct plat_csi_video_entity, vdev);
+}
+
+#define plat_csi_pipeline_call(ent, op, args...) \
+ (!(ent) ? -ENOENT : (((ent)->pipe->ops && (ent)->pipe->ops->op) ? \
+ (ent)->pipe->ops->op(((ent)->pipe), ##args) : -ENOIOCTLCMD)) \
+
+#endif /* __DW_MIPI_CSI_PLTFRM_INCLUDES_H_ */
--
2.7.4
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