445 lines
12 KiB
C
445 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Surface System Aggregator Module (SSAM) client device registry.
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*
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* Registry for non-platform/non-ACPI SSAM client devices, i.e. devices that
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* cannot be auto-detected. Provides device-hubs and performs instantiation
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* for these devices.
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*
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* Copyright (C) 2020-2022 Maximilian Luz <luzmaximilian@gmail.com>
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*/
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#include <linux/acpi.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/types.h>
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#include <linux/surface_aggregator/device.h>
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/* -- Device registry. ------------------------------------------------------ */
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/*
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* SSAM device names follow the SSAM module alias, meaning they are prefixed
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* with 'ssam:', followed by domain, category, target ID, instance ID, and
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* function, each encoded as two-digit hexadecimal, separated by ':'. In other
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* words, it follows the scheme
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*
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* ssam:dd:cc:tt:ii:ff
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*
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* Where, 'dd', 'cc', 'tt', 'ii', and 'ff' are the two-digit hexadecimal
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* values mentioned above, respectively.
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*/
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/* Root node. */
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static const struct software_node ssam_node_root = {
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.name = "ssam_platform_hub",
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};
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/* KIP device hub (connects keyboard cover devices on Surface Pro 8). */
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static const struct software_node ssam_node_hub_kip = {
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.name = "ssam:00:00:01:0e:00",
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.parent = &ssam_node_root,
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};
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/* Base device hub (devices attached to Surface Book 3 base). */
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static const struct software_node ssam_node_hub_base = {
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.name = "ssam:00:00:02:11:00",
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.parent = &ssam_node_root,
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};
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/* AC adapter. */
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static const struct software_node ssam_node_bat_ac = {
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.name = "ssam:01:02:01:01:01",
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.parent = &ssam_node_root,
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};
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/* Primary battery. */
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static const struct software_node ssam_node_bat_main = {
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.name = "ssam:01:02:01:01:00",
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.parent = &ssam_node_root,
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};
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/* Secondary battery (Surface Book 3). */
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static const struct software_node ssam_node_bat_sb3base = {
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.name = "ssam:01:02:02:01:00",
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.parent = &ssam_node_hub_base,
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};
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/* Platform profile / performance-mode device. */
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static const struct software_node ssam_node_tmp_pprof = {
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.name = "ssam:01:03:01:00:01",
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.parent = &ssam_node_root,
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};
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/* Tablet-mode switch via KIP subsystem. */
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static const struct software_node ssam_node_kip_tablet_switch = {
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.name = "ssam:01:0e:01:00:01",
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.parent = &ssam_node_root,
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};
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/* DTX / detachment-system device (Surface Book 3). */
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static const struct software_node ssam_node_bas_dtx = {
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.name = "ssam:01:11:01:00:00",
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.parent = &ssam_node_root,
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};
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/* HID keyboard (SAM, TID=1). */
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static const struct software_node ssam_node_hid_sam_keyboard = {
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.name = "ssam:01:15:01:01:00",
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.parent = &ssam_node_root,
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};
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/* HID pen stash (SAM, TID=1; pen taken / stashed away evens). */
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static const struct software_node ssam_node_hid_sam_penstash = {
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.name = "ssam:01:15:01:02:00",
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.parent = &ssam_node_root,
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};
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/* HID touchpad (SAM, TID=1). */
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static const struct software_node ssam_node_hid_sam_touchpad = {
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.name = "ssam:01:15:01:03:00",
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.parent = &ssam_node_root,
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};
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/* HID device instance 6 (SAM, TID=1, HID sensor collection). */
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static const struct software_node ssam_node_hid_sam_sensors = {
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.name = "ssam:01:15:01:06:00",
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.parent = &ssam_node_root,
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};
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/* HID device instance 7 (SAM, TID=1, UCM UCSI HID client). */
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static const struct software_node ssam_node_hid_sam_ucm_ucsi = {
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.name = "ssam:01:15:01:07:00",
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.parent = &ssam_node_root,
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};
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/* HID system controls (SAM, TID=1). */
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static const struct software_node ssam_node_hid_sam_sysctrl = {
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.name = "ssam:01:15:01:08:00",
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.parent = &ssam_node_root,
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};
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/* HID keyboard. */
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static const struct software_node ssam_node_hid_main_keyboard = {
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.name = "ssam:01:15:02:01:00",
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.parent = &ssam_node_root,
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};
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/* HID touchpad. */
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static const struct software_node ssam_node_hid_main_touchpad = {
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.name = "ssam:01:15:02:03:00",
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.parent = &ssam_node_root,
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};
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/* HID device instance 5 (unknown HID device). */
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static const struct software_node ssam_node_hid_main_iid5 = {
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.name = "ssam:01:15:02:05:00",
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.parent = &ssam_node_root,
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};
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/* HID keyboard (base hub). */
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static const struct software_node ssam_node_hid_base_keyboard = {
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.name = "ssam:01:15:02:01:00",
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.parent = &ssam_node_hub_base,
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};
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/* HID touchpad (base hub). */
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static const struct software_node ssam_node_hid_base_touchpad = {
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.name = "ssam:01:15:02:03:00",
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.parent = &ssam_node_hub_base,
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};
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/* HID device instance 5 (unknown HID device, base hub). */
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static const struct software_node ssam_node_hid_base_iid5 = {
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.name = "ssam:01:15:02:05:00",
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.parent = &ssam_node_hub_base,
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};
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/* HID device instance 6 (unknown HID device, base hub). */
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static const struct software_node ssam_node_hid_base_iid6 = {
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.name = "ssam:01:15:02:06:00",
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.parent = &ssam_node_hub_base,
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};
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/* HID keyboard (KIP hub). */
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static const struct software_node ssam_node_hid_kip_keyboard = {
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.name = "ssam:01:15:02:01:00",
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.parent = &ssam_node_hub_kip,
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};
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/* HID pen stash (KIP hub; pen taken / stashed away evens). */
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static const struct software_node ssam_node_hid_kip_penstash = {
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.name = "ssam:01:15:02:02:00",
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.parent = &ssam_node_hub_kip,
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};
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/* HID touchpad (KIP hub). */
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static const struct software_node ssam_node_hid_kip_touchpad = {
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.name = "ssam:01:15:02:03:00",
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.parent = &ssam_node_hub_kip,
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};
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/* HID device instance 5 (KIP hub, type-cover firmware update). */
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static const struct software_node ssam_node_hid_kip_fwupd = {
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.name = "ssam:01:15:02:05:00",
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.parent = &ssam_node_hub_kip,
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};
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/* Tablet-mode switch via POS subsystem. */
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static const struct software_node ssam_node_pos_tablet_switch = {
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.name = "ssam:01:26:01:00:01",
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.parent = &ssam_node_root,
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};
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/*
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* Devices for 5th- and 6th-generations models:
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* - Surface Book 2,
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* - Surface Laptop 1 and 2,
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* - Surface Pro 5 and 6.
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*/
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static const struct software_node *ssam_node_group_gen5[] = {
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&ssam_node_root,
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&ssam_node_tmp_pprof,
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NULL,
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};
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/* Devices for Surface Book 3. */
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static const struct software_node *ssam_node_group_sb3[] = {
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&ssam_node_root,
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&ssam_node_hub_base,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_bat_sb3base,
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&ssam_node_tmp_pprof,
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&ssam_node_bas_dtx,
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&ssam_node_hid_base_keyboard,
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&ssam_node_hid_base_touchpad,
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&ssam_node_hid_base_iid5,
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&ssam_node_hid_base_iid6,
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NULL,
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};
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/* Devices for Surface Laptop 3 and 4. */
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static const struct software_node *ssam_node_group_sl3[] = {
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&ssam_node_root,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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&ssam_node_hid_main_keyboard,
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&ssam_node_hid_main_touchpad,
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&ssam_node_hid_main_iid5,
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NULL,
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};
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/* Devices for Surface Laptop 5. */
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static const struct software_node *ssam_node_group_sl5[] = {
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&ssam_node_root,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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&ssam_node_hid_main_keyboard,
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&ssam_node_hid_main_touchpad,
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&ssam_node_hid_main_iid5,
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&ssam_node_hid_sam_ucm_ucsi,
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NULL,
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};
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/* Devices for Surface Laptop Studio. */
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static const struct software_node *ssam_node_group_sls[] = {
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&ssam_node_root,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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&ssam_node_pos_tablet_switch,
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&ssam_node_hid_sam_keyboard,
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&ssam_node_hid_sam_penstash,
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&ssam_node_hid_sam_touchpad,
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&ssam_node_hid_sam_sensors,
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&ssam_node_hid_sam_ucm_ucsi,
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&ssam_node_hid_sam_sysctrl,
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NULL,
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};
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/* Devices for Surface Laptop Go. */
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static const struct software_node *ssam_node_group_slg1[] = {
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&ssam_node_root,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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NULL,
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};
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/* Devices for Surface Pro 7 and Surface Pro 7+. */
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static const struct software_node *ssam_node_group_sp7[] = {
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&ssam_node_root,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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NULL,
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};
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/* Devices for Surface Pro 8 */
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static const struct software_node *ssam_node_group_sp8[] = {
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&ssam_node_root,
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&ssam_node_hub_kip,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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&ssam_node_kip_tablet_switch,
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&ssam_node_hid_kip_keyboard,
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&ssam_node_hid_kip_penstash,
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&ssam_node_hid_kip_touchpad,
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&ssam_node_hid_kip_fwupd,
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&ssam_node_hid_sam_sensors,
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&ssam_node_hid_sam_ucm_ucsi,
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NULL,
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};
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/* Devices for Surface Pro 9 */
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static const struct software_node *ssam_node_group_sp9[] = {
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&ssam_node_root,
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&ssam_node_hub_kip,
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&ssam_node_bat_ac,
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&ssam_node_bat_main,
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&ssam_node_tmp_pprof,
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/* TODO: Tablet mode switch (via POS subsystem) */
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&ssam_node_hid_kip_keyboard,
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&ssam_node_hid_kip_penstash,
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&ssam_node_hid_kip_touchpad,
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&ssam_node_hid_kip_fwupd,
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&ssam_node_hid_sam_sensors,
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&ssam_node_hid_sam_ucm_ucsi,
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NULL,
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};
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/* -- SSAM platform/meta-hub driver. ---------------------------------------- */
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static const struct acpi_device_id ssam_platform_hub_match[] = {
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/* Surface Pro 4, 5, and 6 (OMBR < 0x10) */
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{ "MSHW0081", (unsigned long)ssam_node_group_gen5 },
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/* Surface Pro 6 (OMBR >= 0x10) */
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{ "MSHW0111", (unsigned long)ssam_node_group_gen5 },
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/* Surface Pro 7 */
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{ "MSHW0116", (unsigned long)ssam_node_group_sp7 },
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/* Surface Pro 7+ */
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{ "MSHW0119", (unsigned long)ssam_node_group_sp7 },
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/* Surface Pro 8 */
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{ "MSHW0263", (unsigned long)ssam_node_group_sp8 },
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/* Surface Pro 9 */
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{ "MSHW0343", (unsigned long)ssam_node_group_sp9 },
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/* Surface Book 2 */
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{ "MSHW0107", (unsigned long)ssam_node_group_gen5 },
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/* Surface Book 3 */
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{ "MSHW0117", (unsigned long)ssam_node_group_sb3 },
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/* Surface Laptop 1 */
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{ "MSHW0086", (unsigned long)ssam_node_group_gen5 },
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||
|
|
/* Surface Laptop 2 */
|
||
|
|
{ "MSHW0112", (unsigned long)ssam_node_group_gen5 },
|
||
|
|
|
||
|
|
/* Surface Laptop 3 (13", Intel) */
|
||
|
|
{ "MSHW0114", (unsigned long)ssam_node_group_sl3 },
|
||
|
|
|
||
|
|
/* Surface Laptop 3 (15", AMD) and 4 (15", AMD) */
|
||
|
|
{ "MSHW0110", (unsigned long)ssam_node_group_sl3 },
|
||
|
|
|
||
|
|
/* Surface Laptop 4 (13", Intel) */
|
||
|
|
{ "MSHW0250", (unsigned long)ssam_node_group_sl3 },
|
||
|
|
|
||
|
|
/* Surface Laptop 5 */
|
||
|
|
{ "MSHW0350", (unsigned long)ssam_node_group_sl5 },
|
||
|
|
|
||
|
|
/* Surface Laptop Go 1 */
|
||
|
|
{ "MSHW0118", (unsigned long)ssam_node_group_slg1 },
|
||
|
|
|
||
|
|
/* Surface Laptop Go 2 */
|
||
|
|
{ "MSHW0290", (unsigned long)ssam_node_group_slg1 },
|
||
|
|
|
||
|
|
/* Surface Laptop Studio */
|
||
|
|
{ "MSHW0123", (unsigned long)ssam_node_group_sls },
|
||
|
|
|
||
|
|
{ },
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(acpi, ssam_platform_hub_match);
|
||
|
|
|
||
|
|
static int ssam_platform_hub_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
const struct software_node **nodes;
|
||
|
|
struct ssam_controller *ctrl;
|
||
|
|
struct fwnode_handle *root;
|
||
|
|
int status;
|
||
|
|
|
||
|
|
nodes = (const struct software_node **)acpi_device_get_match_data(&pdev->dev);
|
||
|
|
if (!nodes)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* As we're adding the SSAM client devices as children under this device
|
||
|
|
* and not the SSAM controller, we need to add a device link to the
|
||
|
|
* controller to ensure that we remove all of our devices before the
|
||
|
|
* controller is removed. This also guarantees proper ordering for
|
||
|
|
* suspend/resume of the devices on this hub.
|
||
|
|
*/
|
||
|
|
ctrl = ssam_client_bind(&pdev->dev);
|
||
|
|
if (IS_ERR(ctrl))
|
||
|
|
return PTR_ERR(ctrl) == -ENODEV ? -EPROBE_DEFER : PTR_ERR(ctrl);
|
||
|
|
|
||
|
|
status = software_node_register_node_group(nodes);
|
||
|
|
if (status)
|
||
|
|
return status;
|
||
|
|
|
||
|
|
root = software_node_fwnode(&ssam_node_root);
|
||
|
|
if (!root) {
|
||
|
|
software_node_unregister_node_group(nodes);
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
set_secondary_fwnode(&pdev->dev, root);
|
||
|
|
|
||
|
|
status = __ssam_register_clients(&pdev->dev, ctrl, root);
|
||
|
|
if (status) {
|
||
|
|
set_secondary_fwnode(&pdev->dev, NULL);
|
||
|
|
software_node_unregister_node_group(nodes);
|
||
|
|
}
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, nodes);
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ssam_platform_hub_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
const struct software_node **nodes = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
ssam_remove_clients(&pdev->dev);
|
||
|
|
set_secondary_fwnode(&pdev->dev, NULL);
|
||
|
|
software_node_unregister_node_group(nodes);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver ssam_platform_hub_driver = {
|
||
|
|
.probe = ssam_platform_hub_probe,
|
||
|
|
.remove = ssam_platform_hub_remove,
|
||
|
|
.driver = {
|
||
|
|
.name = "surface_aggregator_platform_hub",
|
||
|
|
.acpi_match_table = ssam_platform_hub_match,
|
||
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
module_platform_driver(ssam_platform_hub_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
|
||
|
|
MODULE_DESCRIPTION("Device-registry for Surface System Aggregator Module");
|
||
|
|
MODULE_LICENSE("GPL");
|