^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * WMI embedded Binary MOF driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2015 Andrew Lutomirski
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2017 VMware, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/wmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define WMI_BMOF_GUID "05901221-D566-11D1-B2F0-00A0C9062910"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct bmof_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) union acpi_object *bmofdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct bin_attribute bmof_bin_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) read_bmof(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct bin_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) char *buf, loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct bmof_priv *priv =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) container_of(attr, struct bmof_priv, bmof_bin_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) if (off < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (off >= priv->bmofdata->buffer.length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (count > priv->bmofdata->buffer.length - off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) count = priv->bmofdata->buffer.length - off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) memcpy(buf, priv->bmofdata->buffer.pointer + off, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct bmof_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) priv = devm_kzalloc(&wdev->dev, sizeof(struct bmof_priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) dev_set_drvdata(&wdev->dev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) priv->bmofdata = wmidev_block_query(wdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!priv->bmofdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev_err(&wdev->dev, "failed to read Binary MOF\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (priv->bmofdata->type != ACPI_TYPE_BUFFER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) dev_err(&wdev->dev, "Binary MOF is not a buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) sysfs_bin_attr_init(&priv->bmof_bin_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) priv->bmof_bin_attr.attr.name = "bmof";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) priv->bmof_bin_attr.attr.mode = 0400;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) priv->bmof_bin_attr.read = read_bmof;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) priv->bmof_bin_attr.size = priv->bmofdata->buffer.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ret = sysfs_create_bin_file(&wdev->dev.kobj, &priv->bmof_bin_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) kfree(priv->bmofdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int wmi_bmof_remove(struct wmi_device *wdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct bmof_priv *priv = dev_get_drvdata(&wdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sysfs_remove_bin_file(&wdev->dev.kobj, &priv->bmof_bin_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) kfree(priv->bmofdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static const struct wmi_device_id wmi_bmof_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) { .guid_string = WMI_BMOF_GUID },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static struct wmi_driver wmi_bmof_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .name = "wmi-bmof",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .probe = wmi_bmof_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .remove = wmi_bmof_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .id_table = wmi_bmof_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) module_wmi_driver(wmi_bmof_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) MODULE_DEVICE_TABLE(wmi, wmi_bmof_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MODULE_AUTHOR("Andrew Lutomirski <luto@kernel.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) MODULE_DESCRIPTION("WMI embedded Binary MOF driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags