X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fstaging%2Fchunkeey.git;a=blobdiff_plain;f=target%2Flinux%2Fbcm27xx%2Fpatches-5.10%2F950-0052-char-broadcom-Add-vcio-module.patch;fp=target%2Flinux%2Fbcm27xx%2Fpatches-5.10%2F950-0052-char-broadcom-Add-vcio-module.patch;h=0000000000000000000000000000000000000000;hp=9d3260b121b38136a06254a5d79843834eba69c9;hb=d5c4f24b2af991df2ec24df1a3f906049370f59f;hpb=99ad84b6d9727a63f99a16e0b8386747262e3433 diff --git a/target/linux/bcm27xx/patches-5.10/950-0052-char-broadcom-Add-vcio-module.patch b/target/linux/bcm27xx/patches-5.10/950-0052-char-broadcom-Add-vcio-module.patch deleted file mode 100644 index 9d3260b121..0000000000 --- a/target/linux/bcm27xx/patches-5.10/950-0052-char-broadcom-Add-vcio-module.patch +++ /dev/null @@ -1,254 +0,0 @@ -From ee17bae9c9f8fbe02644f13c01c6dd06e9c4bbc3 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= -Date: Fri, 26 Jun 2015 14:27:06 +0200 -Subject: [PATCH] char: broadcom: Add vcio module -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Add module for accessing the mailbox property channel through -/dev/vcio. Was previously in bcm2708-vcio. - -Signed-off-by: Noralf Trønnes - -char: vcio: Add compat ioctl handling - -There was no compat ioctl handler, so 32 bit userspace on a -64 bit kernel failed as IOCTL_MBOX_PROPERTY used the size -of char*. - -Signed-off-by: Dave Stevenson - -char: vcio: Fail probe if rpi_firmware is not found. - -Device Tree is now the only supported config mechanism, therefore -uncomment the block of code that fails the probe if the -firmware node can't be found. - -Signed-off-by: Dave Stevenson ---- - drivers/char/broadcom/Kconfig | 6 + - drivers/char/broadcom/Makefile | 1 + - drivers/char/broadcom/vcio.c | 194 +++++++++++++++++++++++++++++++++ - 3 files changed, 201 insertions(+) - create mode 100644 drivers/char/broadcom/vcio.c - ---- a/drivers/char/broadcom/Kconfig -+++ b/drivers/char/broadcom/Kconfig -@@ -15,6 +15,12 @@ config BCM2708_VCMEM - help - Helper for videocore memory access and total size allocation. - -+config BCM_VCIO -+ tristate "Mailbox userspace access" -+ depends on BCM2835_MBOX -+ help -+ Gives access to the mailbox property channel from userspace. -+ - endif - - config BCM2835_DEVGPIOMEM ---- a/drivers/char/broadcom/Makefile -+++ b/drivers/char/broadcom/Makefile -@@ -1,3 +1,4 @@ - obj-$(CONFIG_BCM2708_VCMEM) += vc_mem.o -+obj-$(CONFIG_BCM_VCIO) += vcio.o - obj-$(CONFIG_BCM2835_DEVGPIOMEM)+= bcm2835-gpiomem.o - obj-$(CONFIG_BCM2835_SMI_DEV) += bcm2835_smi_dev.o ---- /dev/null -+++ b/drivers/char/broadcom/vcio.c -@@ -0,0 +1,194 @@ -+/* -+ * Copyright (C) 2010 Broadcom -+ * Copyright (C) 2015 Noralf Trønnes -+ * -+ * 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. -+ * -+ */ -+ -+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#define MBOX_CHAN_PROPERTY 8 -+ -+#define VCIO_IOC_MAGIC 100 -+#define IOCTL_MBOX_PROPERTY _IOWR(VCIO_IOC_MAGIC, 0, char *) -+#ifdef CONFIG_COMPAT -+#define IOCTL_MBOX_PROPERTY32 _IOWR(VCIO_IOC_MAGIC, 0, compat_uptr_t) -+#endif -+ -+static struct { -+ dev_t devt; -+ struct cdev cdev; -+ struct class *class; -+ struct rpi_firmware *fw; -+} vcio; -+ -+static int vcio_user_property_list(void *user) -+{ -+ u32 *buf, size; -+ int ret; -+ -+ /* The first 32-bit is the size of the buffer */ -+ if (copy_from_user(&size, user, sizeof(size))) -+ return -EFAULT; -+ -+ buf = kmalloc(size, GFP_KERNEL); -+ if (!buf) -+ return -ENOMEM; -+ -+ if (copy_from_user(buf, user, size)) { -+ kfree(buf); -+ return -EFAULT; -+ } -+ -+ /* Strip off protocol encapsulation */ -+ ret = rpi_firmware_property_list(vcio.fw, &buf[2], size - 12); -+ if (ret) { -+ kfree(buf); -+ return ret; -+ } -+ -+ buf[1] = RPI_FIRMWARE_STATUS_SUCCESS; -+ if (copy_to_user(user, buf, size)) -+ ret = -EFAULT; -+ -+ kfree(buf); -+ -+ return ret; -+} -+ -+static int vcio_device_open(struct inode *inode, struct file *file) -+{ -+ try_module_get(THIS_MODULE); -+ -+ return 0; -+} -+ -+static int vcio_device_release(struct inode *inode, struct file *file) -+{ -+ module_put(THIS_MODULE); -+ -+ return 0; -+} -+ -+static long vcio_device_ioctl(struct file *file, unsigned int ioctl_num, -+ unsigned long ioctl_param) -+{ -+ switch (ioctl_num) { -+ case IOCTL_MBOX_PROPERTY: -+ return vcio_user_property_list((void *)ioctl_param); -+ default: -+ pr_err("unknown ioctl: %x\n", ioctl_num); -+ return -EINVAL; -+ } -+} -+ -+#ifdef CONFIG_COMPAT -+static long vcio_device_compat_ioctl(struct file *file, unsigned int ioctl_num, -+ unsigned long ioctl_param) -+{ -+ switch (ioctl_num) { -+ case IOCTL_MBOX_PROPERTY32: -+ return vcio_user_property_list(compat_ptr(ioctl_param)); -+ default: -+ pr_err("unknown ioctl: %x\n", ioctl_num); -+ return -EINVAL; -+ } -+} -+#endif -+ -+const struct file_operations vcio_fops = { -+ .unlocked_ioctl = vcio_device_ioctl, -+#ifdef CONFIG_COMPAT -+ .compat_ioctl = vcio_device_compat_ioctl, -+#endif -+ .open = vcio_device_open, -+ .release = vcio_device_release, -+}; -+ -+static int __init vcio_init(void) -+{ -+ struct device_node *np; -+ static struct device *dev; -+ int ret; -+ -+ np = of_find_compatible_node(NULL, NULL, -+ "raspberrypi,bcm2835-firmware"); -+ if (!of_device_is_available(np)) -+ return -ENODEV; -+ -+ vcio.fw = rpi_firmware_get(np); -+ if (!vcio.fw) -+ return -ENODEV; -+ -+ ret = alloc_chrdev_region(&vcio.devt, 0, 1, "vcio"); -+ if (ret) { -+ pr_err("failed to allocate device number\n"); -+ return ret; -+ } -+ -+ cdev_init(&vcio.cdev, &vcio_fops); -+ vcio.cdev.owner = THIS_MODULE; -+ ret = cdev_add(&vcio.cdev, vcio.devt, 1); -+ if (ret) { -+ pr_err("failed to register device\n"); -+ goto err_unregister_chardev; -+ } -+ -+ /* -+ * Create sysfs entries -+ * 'bcm2708_vcio' is used for backwards compatibility so we don't break -+ * userspace. Raspian has a udev rule that changes the permissions. -+ */ -+ vcio.class = class_create(THIS_MODULE, "bcm2708_vcio"); -+ if (IS_ERR(vcio.class)) { -+ ret = PTR_ERR(vcio.class); -+ pr_err("failed to create class\n"); -+ goto err_cdev_del; -+ } -+ -+ dev = device_create(vcio.class, NULL, vcio.devt, NULL, "vcio"); -+ if (IS_ERR(dev)) { -+ ret = PTR_ERR(dev); -+ pr_err("failed to create device\n"); -+ goto err_class_destroy; -+ } -+ -+ return 0; -+ -+err_class_destroy: -+ class_destroy(vcio.class); -+err_cdev_del: -+ cdev_del(&vcio.cdev); -+err_unregister_chardev: -+ unregister_chrdev_region(vcio.devt, 1); -+ -+ return ret; -+} -+module_init(vcio_init); -+ -+static void __exit vcio_exit(void) -+{ -+ device_destroy(vcio.class, vcio.devt); -+ class_destroy(vcio.class); -+ cdev_del(&vcio.cdev); -+ unregister_chrdev_region(vcio.devt, 1); -+} -+module_exit(vcio_exit); -+ -+MODULE_AUTHOR("Gray Girling"); -+MODULE_AUTHOR("Noralf Trønnes"); -+MODULE_DESCRIPTION("Mailbox userspace access"); -+MODULE_LICENSE("GPL");