X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch;fp=target%2Flinux%2Fbrcm2708%2Fpatches-4.19%2F950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch;h=0000000000000000000000000000000000000000;hb=7d7aa2fd924c27829ec25f825481554dd81bce97;hp=fb358aa45f740934cfdc69024ac5990dda709b6d;hpb=e7bfda2c243e66a75ff966ba04c28b1590b5d24c;p=openwrt%2Fopenwrt.git diff --git a/target/linux/brcm2708/patches-4.19/950-0478-drivers-char-add-chardev-for-mmap-ing-Argon-control-.patch b/target/linux/brcm2708/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/brcm2708/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 -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 ---- - 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 -+ * 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 -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#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 ");