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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-03-26 11:46:25 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-04-03 01:01:37 -0300
commit40ac9b196d07813132e2d5a14aae40d5812f131e (patch)
treebba3da9b78faedb8706dfe3cdc051b51731a4256
parentdf3305156f989339529b3d6744b898d498fb1f7b (diff)
[media] v4l: xilinx: Add Video Timing Controller driver
The Video Timing Controller (VTC) includes a timing detector and/or a timing generator. Only the generator is currently supported. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
-rw-r--r--Documentation/devicetree/bindings/media/xilinx/xlnx,v-tc.txt33
-rw-r--r--drivers/media/platform/xilinx/Kconfig6
-rw-r--r--drivers/media/platform/xilinx/Makefile1
-rw-r--r--drivers/media/platform/xilinx/xilinx-vtc.c380
-rw-r--r--drivers/media/platform/xilinx/xilinx-vtc.h42
5 files changed, 462 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tc.txt b/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tc.txt
new file mode 100644
index 000000000000..2aed3b4a6cf1
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tc.txt
@@ -0,0 +1,33 @@
+Xilinx Video Timing Controller (VTC)
+------------------------------------
+
+The Video Timing Controller is a general purpose video timing generator and
+detector.
+
+Required properties:
+
+ - compatible: Must be "xlnx,v-tc-6.1".
+
+ - reg: Physical base address and length of the registers set for the device.
+
+ - clocks: Must contain a clock specifier for the VTC core and timing
+ interfaces clock.
+
+Optional properties:
+
+ - xlnx,detector: The VTC has a timing detector
+ - xlnx,generator: The VTC has a timing generator
+
+ At least one of the xlnx,detector and xlnx,generator properties must be
+ specified.
+
+
+Example:
+
+ vtc: vtc@43c40000 {
+ compatible = "xlnx,v-tc-6.1";
+ reg = <0x43c40000 0x10000>;
+
+ clocks = <&clkc 15>;
+ xlnx,generator;
+ };
diff --git a/drivers/media/platform/xilinx/Kconfig b/drivers/media/platform/xilinx/Kconfig
index f4347e9af252..19db82343bb8 100644
--- a/drivers/media/platform/xilinx/Kconfig
+++ b/drivers/media/platform/xilinx/Kconfig
@@ -7,4 +7,10 @@ config VIDEO_XILINX
if VIDEO_XILINX
+config VIDEO_XILINX_VTC
+ tristate "Xilinx Video Timing Controller"
+ depends on VIDEO_XILINX
+ ---help---
+ Driver for the Xilinx Video Timing Controller
+
endif #VIDEO_XILINX
diff --git a/drivers/media/platform/xilinx/Makefile b/drivers/media/platform/xilinx/Makefile
index 3ef9c8e3cc8d..6611e3228e3c 100644
--- a/drivers/media/platform/xilinx/Makefile
+++ b/drivers/media/platform/xilinx/Makefile
@@ -1,3 +1,4 @@
xilinx-video-objs += xilinx-dma.o xilinx-vip.o xilinx-vipp.o
obj-$(CONFIG_VIDEO_XILINX) += xilinx-video.o
+obj-$(CONFIG_VIDEO_XILINX_VTC) += xilinx-vtc.o
diff --git a/drivers/media/platform/xilinx/xilinx-vtc.c b/drivers/media/platform/xilinx/xilinx-vtc.c
new file mode 100644
index 000000000000..01c750edcac5
--- /dev/null
+++ b/drivers/media/platform/xilinx/xilinx-vtc.c
@@ -0,0 +1,380 @@
+/*
+ * Xilinx Video Timing Controller
+ *
+ * Copyright (C) 2013-2015 Ideas on Board
+ * Copyright (C) 2013-2015 Xilinx, Inc.
+ *
+ * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
+ * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * 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/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "xilinx-vip.h"
+#include "xilinx-vtc.h"
+
+#define XVTC_CONTROL_FIELD_ID_POL_SRC (1 << 26)
+#define XVTC_CONTROL_ACTIVE_CHROMA_POL_SRC (1 << 25)
+#define XVTC_CONTROL_ACTIVE_VIDEO_POL_SRC (1 << 24)
+#define XVTC_CONTROL_HSYNC_POL_SRC (1 << 23)
+#define XVTC_CONTROL_VSYNC_POL_SRC (1 << 22)
+#define XVTC_CONTROL_HBLANK_POL_SRC (1 << 21)
+#define XVTC_CONTROL_VBLANK_POL_SRC (1 << 20)
+#define XVTC_CONTROL_CHROMA_SRC (1 << 18)
+#define XVTC_CONTROL_VBLANK_HOFF_SRC (1 << 17)
+#define XVTC_CONTROL_VSYNC_END_SRC (1 << 16)
+#define XVTC_CONTROL_VSYNC_START_SRC (1 << 15)
+#define XVTC_CONTROL_ACTIVE_VSIZE_SRC (1 << 14)
+#define XVTC_CONTROL_FRAME_VSIZE_SRC (1 << 13)
+#define XVTC_CONTROL_HSYNC_END_SRC (1 << 11)
+#define XVTC_CONTROL_HSYNC_START_SRC (1 << 10)
+#define XVTC_CONTROL_ACTIVE_HSIZE_SRC (1 << 9)
+#define XVTC_CONTROL_FRAME_HSIZE_SRC (1 << 8)
+#define XVTC_CONTROL_SYNC_ENABLE (1 << 5)
+#define XVTC_CONTROL_DET_ENABLE (1 << 3)
+#define XVTC_CONTROL_GEN_ENABLE (1 << 2)
+
+#define XVTC_STATUS_FSYNC(n) ((n) << 16)
+#define XVTC_STATUS_GEN_ACTIVE_VIDEO (1 << 13)
+#define XVTC_STATUS_GEN_VBLANK (1 << 12)
+#define XVTC_STATUS_DET_ACTIVE_VIDEO (1 << 11)
+#define XVTC_STATUS_DET_VBLANK (1 << 10)
+#define XVTC_STATUS_LOCK_LOSS (1 << 9)
+#define XVTC_STATUS_LOCK (1 << 8)
+
+#define XVTC_ERROR_ACTIVE_CHROMA_LOCK (1 << 21)
+#define XVTC_ERROR_ACTIVE_VIDEO_LOCK (1 << 20)
+#define XVTC_ERROR_HSYNC_LOCK (1 << 19)
+#define XVTC_ERROR_VSYNC_LOCK (1 << 18)
+#define XVTC_ERROR_HBLANK_LOCK (1 << 17)
+#define XVTC_ERROR_VBLANK_LOCK (1 << 16)
+
+#define XVTC_IRQ_ENABLE_FSYNC(n) ((n) << 16)
+#define XVTC_IRQ_ENABLE_GEN_ACTIVE_VIDEO (1 << 13)
+#define XVTC_IRQ_ENABLE_GEN_VBLANK (1 << 12)
+#define XVTC_IRQ_ENABLE_DET_ACTIVE_VIDEO (1 << 11)
+#define XVTC_IRQ_ENABLE_DET_VBLANK (1 << 10)
+#define XVTC_IRQ_ENABLE_LOCK_LOSS (1 << 9)
+#define XVTC_IRQ_ENABLE_LOCK (1 << 8)
+
+/*
+ * The following registers exist in two blocks, one at 0x0020 for the detector
+ * and one at 0x0060 for the generator.
+ */
+
+#define XVTC_DETECTOR_OFFSET 0x0020
+#define XVTC_GENERATOR_OFFSET 0x0060
+
+#define XVTC_ACTIVE_SIZE 0x0000
+#define XVTC_ACTIVE_VSIZE_SHIFT 16
+#define XVTC_ACTIVE_VSIZE_MASK (0x1fff << 16)
+#define XVTC_ACTIVE_HSIZE_SHIFT 0
+#define XVTC_ACTIVE_HSIZE_MASK (0x1fff << 0)
+
+#define XVTC_TIMING_STATUS 0x0004
+#define XVTC_TIMING_STATUS_ACTIVE_VIDEO (1 << 2)
+#define XVTC_TIMING_STATUS_VBLANK (1 << 1)
+#define XVTC_TIMING_STATUS_LOCKED (1 << 0)
+
+#define XVTC_ENCODING 0x0008
+#define XVTC_ENCODING_CHROMA_PARITY_SHIFT 8
+#define XVTC_ENCODING_CHROMA_PARITY_MASK (3 << 8)
+#define XVTC_ENCODING_CHROMA_PARITY_EVEN_ALL (0 << 8)
+#define XVTC_ENCODING_CHROMA_PARITY_ODD_ALL (1 << 8)
+#define XVTC_ENCODING_CHROMA_PARITY_EVEN_EVEN (2 << 8)
+#define XVTC_ENCODING_CHROMA_PARITY_ODD_EVEN (3 << 8)
+#define XVTC_ENCODING_VIDEO_FORMAT_SHIFT 0
+#define XVTC_ENCODING_VIDEO_FORMAT_MASK (0xf << 0)
+#define XVTC_ENCODING_VIDEO_FORMAT_YUV422 (0 << 0)
+#define XVTC_ENCODING_VIDEO_FORMAT_YUV444 (1 << 0)
+#define XVTC_ENCODING_VIDEO_FORMAT_RGB (2 << 0)
+#define XVTC_ENCODING_VIDEO_FORMAT_YUV420 (3 << 0)
+
+#define XVTC_POLARITY 0x000c
+#define XVTC_POLARITY_ACTIVE_CHROMA_POL (1 << 5)
+#define XVTC_POLARITY_ACTIVE_VIDEO_POL (1 << 4)
+#define XVTC_POLARITY_HSYNC_POL (1 << 3)
+#define XVTC_POLARITY_VSYNC_POL (1 << 2)
+#define XVTC_POLARITY_HBLANK_POL (1 << 1)
+#define XVTC_POLARITY_VBLANK_POL (1 << 0)
+
+#define XVTC_HSIZE 0x0010
+#define XVTC_HSIZE_MASK (0x1fff << 0)
+
+#define XVTC_VSIZE 0x0014
+#define XVTC_VSIZE_MASK (0x1fff << 0)
+
+#define XVTC_HSYNC 0x0018
+#define XVTC_HSYNC_END_SHIFT 16
+#define XVTC_HSYNC_END_MASK (0x1fff << 16)
+#define XVTC_HSYNC_START_SHIFT 0
+#define XVTC_HSYNC_START_MASK (0x1fff << 0)
+
+#define XVTC_F0_VBLANK_H 0x001c
+#define XVTC_F0_VBLANK_HEND_SHIFT 16
+#define XVTC_F0_VBLANK_HEND_MASK (0x1fff << 16)
+#define XVTC_F0_VBLANK_HSTART_SHIFT 0
+#define XVTC_F0_VBLANK_HSTART_MASK (0x1fff << 0)
+
+#define XVTC_F0_VSYNC_V 0x0020
+#define XVTC_F0_VSYNC_VEND_SHIFT 16
+#define XVTC_F0_VSYNC_VEND_MASK (0x1fff << 16)
+#define XVTC_F0_VSYNC_VSTART_SHIFT 0
+#define XVTC_F0_VSYNC_VSTART_MASK (0x1fff << 0)
+
+#define XVTC_F0_VSYNC_H 0x0024
+#define XVTC_F0_VSYNC_HEND_SHIFT 16
+#define XVTC_F0_VSYNC_HEND_MASK (0x1fff << 16)
+#define XVTC_F0_VSYNC_HSTART_SHIFT 0
+#define XVTC_F0_VSYNC_HSTART_MASK (0x1fff << 0)
+
+#define XVTC_FRAME_SYNC_CONFIG(n) (0x0100 + 4 * (n))
+#define XVTC_FRAME_SYNC_V_START_SHIFT 16
+#define XVTC_FRAME_SYNC_V_START_MASK (0x1fff << 16)
+#define XVTC_FRAME_SYNC_H_START_SHIFT 0
+#define XVTC_FRAME_SYNC_H_START_MASK (0x1fff << 0)
+
+#define XVTC_GENERATOR_GLOBAL_DELAY 0x0104
+
+/**
+ * struct xvtc_device - Xilinx Video Timing Controller device structure
+ * @xvip: Xilinx Video IP device
+ * @list: entry in the global VTC list
+ * @has_detector: the VTC has a timing detector
+ * @has_generator: the VTC has a timing generator
+ * @config: generator timings configuration
+ */
+struct xvtc_device {
+ struct xvip_device xvip;
+ struct list_head list;
+
+ bool has_detector;
+ bool has_generator;
+
+ struct xvtc_config config;
+};
+
+static LIST_HEAD(xvtc_list);
+static DEFINE_MUTEX(xvtc_lock);
+
+static inline void xvtc_gen_write(struct xvtc_device *xvtc, u32 addr, u32 value)
+{
+ xvip_write(&xvtc->xvip, XVTC_GENERATOR_OFFSET + addr, value);
+}
+
+/* -----------------------------------------------------------------------------
+ * Generator Operations
+ */
+
+int xvtc_generator_start(struct xvtc_device *xvtc,
+ const struct xvtc_config *config)
+{
+ int ret;
+
+ if (!xvtc->has_generator)
+ return -ENXIO;
+
+ ret = clk_prepare_enable(xvtc->xvip.clk);
+ if (ret < 0)
+ return ret;
+
+ /* We don't care about the chroma active signal, encoding parameters are
+ * not important for now.
+ */
+ xvtc_gen_write(xvtc, XVTC_POLARITY,
+ XVTC_POLARITY_ACTIVE_CHROMA_POL |
+ XVTC_POLARITY_ACTIVE_VIDEO_POL |
+ XVTC_POLARITY_HSYNC_POL | XVTC_POLARITY_VSYNC_POL |
+ XVTC_POLARITY_HBLANK_POL | XVTC_POLARITY_VBLANK_POL);
+
+ /* Hardcode the polarity to active high, as required by the video in to
+ * AXI4-stream core.
+ */
+ xvtc_gen_write(xvtc, XVTC_ENCODING, 0);
+
+ /* Configure the timings. The VBLANK and VSYNC signals assertion and
+ * deassertion are hardcoded to the first pixel of the line.
+ */
+ xvtc_gen_write(xvtc, XVTC_ACTIVE_SIZE,
+ (config->vblank_start << XVTC_ACTIVE_VSIZE_SHIFT) |
+ (config->hblank_start << XVTC_ACTIVE_HSIZE_SHIFT));
+ xvtc_gen_write(xvtc, XVTC_HSIZE, config->hsize);
+ xvtc_gen_write(xvtc, XVTC_VSIZE, config->vsize);
+ xvtc_gen_write(xvtc, XVTC_HSYNC,
+ (config->hsync_end << XVTC_HSYNC_END_SHIFT) |
+ (config->hsync_start << XVTC_HSYNC_START_SHIFT));
+ xvtc_gen_write(xvtc, XVTC_F0_VBLANK_H, 0);
+ xvtc_gen_write(xvtc, XVTC_F0_VSYNC_V,
+ (config->vsync_end << XVTC_F0_VSYNC_VEND_SHIFT) |
+ (config->vsync_start << XVTC_F0_VSYNC_VSTART_SHIFT));
+ xvtc_gen_write(xvtc, XVTC_F0_VSYNC_H, 0);
+
+ /* Enable the generator. Set the source of all generator parameters to
+ * generator registers.
+ */
+ xvip_write(&xvtc->xvip, XVIP_CTRL_CONTROL,
+ XVTC_CONTROL_ACTIVE_CHROMA_POL_SRC |
+ XVTC_CONTROL_ACTIVE_VIDEO_POL_SRC |
+ XVTC_CONTROL_HSYNC_POL_SRC | XVTC_CONTROL_VSYNC_POL_SRC |
+ XVTC_CONTROL_HBLANK_POL_SRC | XVTC_CONTROL_VBLANK_POL_SRC |
+ XVTC_CONTROL_CHROMA_SRC | XVTC_CONTROL_VBLANK_HOFF_SRC |
+ XVTC_CONTROL_VSYNC_END_SRC | XVTC_CONTROL_VSYNC_START_SRC |
+ XVTC_CONTROL_ACTIVE_VSIZE_SRC |
+ XVTC_CONTROL_FRAME_VSIZE_SRC | XVTC_CONTROL_HSYNC_END_SRC |
+ XVTC_CONTROL_HSYNC_START_SRC |
+ XVTC_CONTROL_ACTIVE_HSIZE_SRC |
+ XVTC_CONTROL_FRAME_HSIZE_SRC | XVTC_CONTROL_GEN_ENABLE |
+ XVIP_CTRL_CONTROL_REG_UPDATE);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xvtc_generator_start);
+
+int xvtc_generator_stop(struct xvtc_device *xvtc)
+{
+ if (!xvtc->has_generator)
+ return -ENXIO;
+
+ xvip_write(&xvtc->xvip, XVIP_CTRL_CONTROL, 0);
+
+ clk_disable_unprepare(xvtc->xvip.clk);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xvtc_generator_stop);
+
+struct xvtc_device *xvtc_of_get(struct device_node *np)
+{
+ struct device_node *xvtc_node;
+ struct xvtc_device *found = NULL;
+ struct xvtc_device *xvtc;
+
+ if (!of_find_property(np, "xlnx,vtc", NULL))
+ return NULL;
+
+ xvtc_node = of_parse_phandle(np, "xlnx,vtc", 0);
+ if (xvtc_node == NULL)
+ return ERR_PTR(-EINVAL);
+
+ mutex_lock(&xvtc_lock);
+ list_for_each_entry(xvtc, &xvtc_list, list) {
+ if (xvtc->xvip.dev->of_node == xvtc_node) {
+ found = xvtc;
+ break;
+ }
+ }
+ mutex_unlock(&xvtc_lock);
+
+ of_node_put(xvtc_node);
+
+ if (!found)
+ return ERR_PTR(-EPROBE_DEFER);
+
+ return found;
+}
+EXPORT_SYMBOL_GPL(xvtc_of_get);
+
+void xvtc_put(struct xvtc_device *xvtc)
+{
+}
+EXPORT_SYMBOL_GPL(xvtc_put);
+
+/* -----------------------------------------------------------------------------
+ * Registration and Unregistration
+ */
+
+static void xvtc_register_device(struct xvtc_device *xvtc)
+{
+ mutex_lock(&xvtc_lock);
+ list_add_tail(&xvtc->list, &xvtc_list);
+ mutex_unlock(&xvtc_lock);
+}
+
+static void xvtc_unregister_device(struct xvtc_device *xvtc)
+{
+ mutex_lock(&xvtc_lock);
+ list_del(&xvtc->list);
+ mutex_unlock(&xvtc_lock);
+}
+
+/* -----------------------------------------------------------------------------
+ * Platform Device Driver
+ */
+
+static int xvtc_parse_of(struct xvtc_device *xvtc)
+{
+ struct device_node *node = xvtc->xvip.dev->of_node;
+
+ xvtc->has_detector = of_property_read_bool(node, "xlnx,detector");
+ xvtc->has_generator = of_property_read_bool(node, "xlnx,generator");
+
+ return 0;
+}
+
+static int xvtc_probe(struct platform_device *pdev)
+{
+ struct xvtc_device *xvtc;
+ int ret;
+
+ xvtc = devm_kzalloc(&pdev->dev, sizeof(*xvtc), GFP_KERNEL);
+ if (!xvtc)
+ return -ENOMEM;
+
+ xvtc->xvip.dev = &pdev->dev;
+
+ ret = xvtc_parse_of(xvtc);
+ if (ret < 0)
+ return ret;
+
+ ret = xvip_init_resources(&xvtc->xvip);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, xvtc);
+
+ xvip_print_version(&xvtc->xvip);
+
+ xvtc_register_device(xvtc);
+
+ return 0;
+}
+
+static int xvtc_remove(struct platform_device *pdev)
+{
+ struct xvtc_device *xvtc = platform_get_drvdata(pdev);
+
+ xvtc_unregister_device(xvtc);
+
+ xvip_cleanup_resources(&xvtc->xvip);
+
+ return 0;
+}
+
+static const struct of_device_id xvtc_of_id_table[] = {
+ { .compatible = "xlnx,v-tc-6.1" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, xvtc_of_id_table);
+
+static struct platform_driver xvtc_driver = {
+ .driver = {
+ .name = "xilinx-vtc",
+ .of_match_table = xvtc_of_id_table,
+ },
+ .probe = xvtc_probe,
+ .remove = xvtc_remove,
+};
+
+module_platform_driver(xvtc_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Xilinx Video Timing Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/platform/xilinx/xilinx-vtc.h b/drivers/media/platform/xilinx/xilinx-vtc.h
new file mode 100644
index 000000000000..e1bb2cfcf428
--- /dev/null
+++ b/drivers/media/platform/xilinx/xilinx-vtc.h
@@ -0,0 +1,42 @@
+/*
+ * Xilinx Video Timing Controller
+ *
+ * Copyright (C) 2013-2015 Ideas on Board
+ * Copyright (C) 2013-2015 Xilinx, Inc.
+ *
+ * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
+ * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * 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 __XILINX_VTC_H__
+#define __XILINX_VTC_H__
+
+struct device_node;
+struct xvtc_device;
+
+#define XVTC_MAX_HSIZE 8191
+#define XVTC_MAX_VSIZE 8191
+
+struct xvtc_config {
+ unsigned int hblank_start;
+ unsigned int hsync_start;
+ unsigned int hsync_end;
+ unsigned int hsize;
+ unsigned int vblank_start;
+ unsigned int vsync_start;
+ unsigned int vsync_end;
+ unsigned int vsize;
+};
+
+struct xvtc_device *xvtc_of_get(struct device_node *np);
+void xvtc_put(struct xvtc_device *xvtc);
+
+int xvtc_generator_start(struct xvtc_device *xvtc,
+ const struct xvtc_config *config);
+int xvtc_generator_stop(struct xvtc_device *xvtc);
+
+#endif /* __XILINX_VTC_H__ */

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