1 files changed, 0 insertions, 320 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch b/target/linux/bcm27xx/patches-4.19/950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch
deleted file mode 100644
index fb358aa45f..0000000000
--- a/target/linux/bcm27xx/patches-4.19/950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch
+++ /dev/null
@@ -1,320 +0,0 @@
-From 0be0d6439128366a8d2ac0afaf88f19209171e51 Mon Sep 17 00:00:00 2001
-From: Jonathan Bell <jonathan@raspberrypi.org>
-Date: Thu, 9 May 2019 14:30:37 +0100
-Subject: [PATCH] drivers: char: add chardev for mmap'ing Argon control
- registers
-
-Based on the gpiomem driver, allow mapping of the decoder register
-spaces such that userspace can access control/status registers.
-This driver is intended for use with a custom ffmpeg backend accelerator
-prior to a v4l2 driver being written.
-
-Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
----
- drivers/char/broadcom/Kconfig     |   8 +
- drivers/char/broadcom/Makefile    |   1 +
- drivers/char/broadcom/argon-mem.c | 277 ++++++++++++++++++++++++++++++
- 3 files changed, 286 insertions(+)
- create mode 100644 drivers/char/broadcom/argon-mem.c
-
---- a/drivers/char/broadcom/Kconfig
-+++ b/drivers/char/broadcom/Kconfig
-@@ -49,3 +49,11 @@ config BCM2835_SMI_DEV
- 		This driver provides a character device interface (ioctl + read/write) to
- 		Broadcom's Secondary Memory interface. The low-level functionality is provided
- 		by the SMI driver itself.
-+
-+config ARGON_MEM
-+	tristate "Character device driver for the Argon decoder hardware"
-+	default n
-+	help
-+		This driver provides a character device interface for memory-map operations
-+		so userspace tools can access the control and status registers of the Argon
-+		video decoder hardware.
---- a/drivers/char/broadcom/Makefile
-+++ b/drivers/char/broadcom/Makefile
-@@ -4,3 +4,4 @@ obj-$(CONFIG_BCM_VC_SM)         += vc_sm
- 
- obj-$(CONFIG_BCM2835_DEVGPIOMEM)+= bcm2835-gpiomem.o
- obj-$(CONFIG_BCM2835_SMI_DEV)	+= bcm2835_smi_dev.o
-+obj-$(CONFIG_ARGON_MEM)		+= argon-mem.o
---- /dev/null
-+++ b/drivers/char/broadcom/argon-mem.c
-@@ -0,0 +1,277 @@
-+/**
-+ * argon-mem.c - character device access to the Argon decoder registers
-+ *
-+ * Based on bcm2835-gpiomem.c. Provides IO memory access to the decoder
-+ * register blocks such that ffmpeg plugins can access the hardware.
-+ *
-+ * Jonathan Bell <jonathan@raspberrypi.org>
-+ * Copyright (c) 2019, Raspberry Pi (Trading) Ltd.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ *    notice, this list of conditions, and the following disclaimer,
-+ *    without modification.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ *    notice, this list of conditions and the following disclaimer in the
-+ *    documentation and/or other materials provided with the distribution.
-+ * 3. The names of the above-listed copyright holders may not be used
-+ *    to endorse or promote products derived from this software without
-+ *    specific prior written permission.
-+ *
-+ * ALTERNATIVELY, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") version 2, as published by the Free
-+ * Software Foundation.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/platform_device.h>
-+#include <linux/mm.h>
-+#include <linux/slab.h>
-+#include <linux/cdev.h>
-+#include <linux/pagemap.h>
-+#include <linux/io.h>
-+
-+#define DRIVER_NAME "argon-mem"
-+#define DEVICE_MINOR 0
-+
-+struct argon_mem_priv {
-+	dev_t devid;
-+	struct class *class;
-+	struct cdev argon_mem_cdev;
-+	unsigned long regs_phys;
-+	unsigned long mem_window_len;
-+	struct device *dev;
-+	const char *name;
-+};
-+
-+static int argon_mem_open(struct inode *inode, struct file *file)
-+{
-+	int dev = iminor(inode);
-+	int ret = 0;
-+	struct argon_mem_priv *priv;
-+	if (dev != DEVICE_MINOR)
-+		ret = -ENXIO;
-+
-+	priv = container_of(inode->i_cdev, struct argon_mem_priv,
-+				argon_mem_cdev);
-+	if (!priv)
-+		return -EINVAL;
-+	file->private_data = priv;
-+	return ret;
-+}
-+
-+static int argon_mem_release(struct inode *inode, struct file *file)
-+{
-+	int dev = iminor(inode);
-+	int ret = 0;
-+
-+	if (dev != DEVICE_MINOR)
-+		ret = -ENXIO;
-+
-+	return ret;
-+}
-+
-+static const struct vm_operations_struct argon_mem_vm_ops = {
-+#ifdef CONFIG_HAVE_IOREMAP_PROT
-+	.access = generic_access_phys
-+#endif
-+};
-+
-+static int argon_mem_mmap(struct file *file, struct vm_area_struct *vma)
-+{
-+	struct argon_mem_priv *priv;
-+	unsigned long pages;
-+
-+	priv = file->private_data;
-+	pages = priv->regs_phys >> PAGE_SHIFT;
-+	/*
-+	 * The address decode is far larger than the actual number of registers.
-+	 * Just map the whole lot in.
-+	 */
-+	vma->vm_page_prot = phys_mem_access_prot(file, pages,
-+						 priv->mem_window_len,
-+						 vma->vm_page_prot);
-+	vma->vm_ops = &argon_mem_vm_ops;
-+	if (remap_pfn_range(vma, vma->vm_start,
-+			pages,
-+			priv->mem_window_len,
-+			vma->vm_page_prot)) {
-+		return -EAGAIN;
-+	}
-+	return 0;
-+}
-+
-+static const struct file_operations
-+argon_mem_fops = {
-+	.owner = THIS_MODULE,
-+	.open = argon_mem_open,
-+	.release = argon_mem_release,
-+	.mmap = argon_mem_mmap,
-+};
-+
-+static const struct of_device_id argon_mem_of_match[];
-+static int argon_mem_probe(struct platform_device *pdev)
-+{
-+	int err;
-+	void *ptr_err;
-+	const struct of_device_id *id;
-+	struct device *dev = &pdev->dev;
-+	struct device *argon_mem_dev;
-+	struct resource *ioresource;
-+	struct argon_mem_priv *priv;
-+
-+
-+	/* Allocate buffers and instance data */
-+
-+	priv = kzalloc(sizeof(struct argon_mem_priv), GFP_KERNEL);
-+
-+	if (!priv) {
-+		err = -ENOMEM;
-+		goto failed_inst_alloc;
-+	}
-+	platform_set_drvdata(pdev, priv);
-+
-+	priv->dev = dev;
-+	id = of_match_device(argon_mem_of_match, dev);
-+	if (!id)
-+		return -EINVAL;
-+	priv->name = id->data;
-+
-+	ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+	if (ioresource) {
-+		priv->regs_phys = ioresource->start;
-+		priv->mem_window_len = ioresource->end - ioresource->start;
-+	} else {
-+		dev_err(priv->dev, "failed to get IO resource");
-+		err = -ENOENT;
-+		goto failed_get_resource;
-+	}
-+
-+	/* Create character device entries */
-+
-+	err = alloc_chrdev_region(&priv->devid,
-+				  DEVICE_MINOR, 1, priv->name);
-+	if (err != 0) {
-+		dev_err(priv->dev, "unable to allocate device number");
-+		goto failed_alloc_chrdev;
-+	}
-+	cdev_init(&priv->argon_mem_cdev, &argon_mem_fops);
-+	priv->argon_mem_cdev.owner = THIS_MODULE;
-+	err = cdev_add(&priv->argon_mem_cdev, priv->devid, 1);
-+	if (err != 0) {
-+		dev_err(priv->dev, "unable to register device");
-+		goto failed_cdev_add;
-+	}
-+
-+	/* Create sysfs entries */
-+
-+	priv->class = class_create(THIS_MODULE, priv->name);
-+	ptr_err = priv->class;
-+	if (IS_ERR(ptr_err))
-+		goto failed_class_create;
-+
-+	argon_mem_dev = device_create(priv->class, NULL,
-+					priv->devid, NULL,
-+					priv->name);
-+	ptr_err = argon_mem_dev;
-+	if (IS_ERR(ptr_err))
-+		goto failed_device_create;
-+
-+	dev_info(priv->dev, "%s initialised: Registers at 0x%08lx length 0x%08lx",
-+		priv->name, priv->regs_phys, priv->mem_window_len);
-+
-+	return 0;
-+
-+failed_device_create:
-+	class_destroy(priv->class);
-+failed_class_create:
-+	cdev_del(&priv->argon_mem_cdev);
-+	err = PTR_ERR(ptr_err);
-+failed_cdev_add:
-+	unregister_chrdev_region(priv->devid, 1);
-+failed_alloc_chrdev:
-+failed_get_resource:
-+	kfree(priv);
-+failed_inst_alloc:
-+	dev_err(priv->dev, "could not load argon_mem");
-+	return err;
-+}
-+
-+static int argon_mem_remove(struct platform_device *pdev)
-+{
-+	struct device *dev = &pdev->dev;
-+	struct argon_mem_priv *priv = platform_get_drvdata(pdev);
-+
-+	device_destroy(priv->class, priv->devid);
-+	class_destroy(priv->class);
-+	cdev_del(&priv->argon_mem_cdev);
-+	unregister_chrdev_region(priv->devid, 1);
-+	kfree(priv);
-+
-+	dev_info(dev, "%s driver removed - OK", priv->name);
-+	return 0;
-+}
-+
-+static const char argon_hevc_name[] = "argon-hevcmem";
-+static const char argon_h264_name[] = "argon-h264mem";
-+static const char argon_vp9_name[] = "argon-vp9mem";
-+static const char argon_intc_name[] = "argon-intcmem";
-+
-+static const struct of_device_id argon_mem_of_match[] = {
-+	{
-+		.compatible = "raspberrypi,argon-hevc-decoder",
-+		.data = &argon_hevc_name,
-+	},
-+	{
-+		.compatible = "raspberrypi,argon-h264-decoder",
-+		.data = &argon_h264_name,
-+	},
-+	{
-+		.compatible = "raspberrypi,argon-vp9-decoder",
-+		.data = &argon_vp9_name,
-+	},
-+	/* The "intc" is included as this block of hardware contains the
-+	 * "frame done" status flags.
-+	 */
-+	{
-+		.compatible = "raspberrypi,argon-local-intc",
-+		.data = &argon_intc_name,
-+	},
-+	{ /* sentinel */ },
-+};
-+
-+MODULE_DEVICE_TABLE(of, argon_mem_of_match);
-+
-+static struct platform_driver argon_mem_driver = {
-+	.probe = argon_mem_probe,
-+	.remove = argon_mem_remove,
-+	.driver = {
-+		   .name = DRIVER_NAME,
-+		   .owner = THIS_MODULE,
-+		   .of_match_table = argon_mem_of_match,
-+		   },
-+};
-+
-+module_platform_driver(argon_mem_driver);
-+
-+MODULE_ALIAS("platform:argon-mem");
-+MODULE_LICENSE("GPL");
-+MODULE_DESCRIPTION("Driver for accessing Argon decoder registers from userspace");
-+MODULE_AUTHOR("Jonathan Bell <jonathan@raspberrypi.org>");