Adds a driver for the Surface platform Integration Device (SID) of the Surface Book 2. This allows for setting the performance-mode, which can be used to choose between performance-optimized vs. quiet operation. The performance-mode can be set via the perf_mode sysfs attribute on the corresponding device (MSHW0107).
4140 lines
108 KiB
Diff
4140 lines
108 KiB
Diff
From 20b5a1e18431a908f82b9422f6e54979b73900d5 Mon Sep 17 00:00:00 2001
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From: qzed <qzed@users.noreply.github.com>
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Date: Sun, 21 Apr 2019 15:18:23 +0200
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Subject: [PATCH 01/11] surface-acpi
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---
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drivers/acpi/acpica/dsopcode.c | 2 +-
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drivers/acpi/acpica/exfield.c | 12 +-
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drivers/platform/x86/Kconfig | 97 +
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drivers/platform/x86/Makefile | 1 +
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drivers/platform/x86/surface_acpi.c | 3828 +++++++++++++++++++++++++++
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drivers/tty/serdev/core.c | 90 +-
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6 files changed, 4024 insertions(+), 6 deletions(-)
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create mode 100644 drivers/platform/x86/surface_acpi.c
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diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
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index 78f9de260d5f..0cd858520f5b 100644
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--- a/drivers/acpi/acpica/dsopcode.c
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+++ b/drivers/acpi/acpica/dsopcode.c
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@@ -123,7 +123,7 @@ acpi_ds_init_buffer_field(u16 aml_opcode,
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/* Offset is in bits, count is in bits */
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- field_flags = AML_FIELD_ACCESS_BYTE;
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+ field_flags = AML_FIELD_ACCESS_BUFFER;
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bit_offset = offset;
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bit_count = (u32) length_desc->integer.value;
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diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c
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index e5798f15793a..55abd9e035a0 100644
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--- a/drivers/acpi/acpica/exfield.c
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+++ b/drivers/acpi/acpica/exfield.c
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@@ -98,6 +98,7 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
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union acpi_operand_object *buffer_desc;
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void *buffer;
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u32 buffer_length;
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+ u8 field_flags;
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ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc);
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@@ -146,11 +147,16 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
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* Note: Field.length is in bits.
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*/
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buffer_length =
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- (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length);
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+ (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length);
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+ field_flags = obj_desc->common_field.field_flags;
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- if (buffer_length > acpi_gbl_integer_byte_width) {
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+ if (buffer_length > acpi_gbl_integer_byte_width ||
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+ (field_flags & AML_FIELD_ACCESS_TYPE_MASK) == AML_FIELD_ACCESS_BUFFER) {
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- /* Field is too large for an Integer, create a Buffer instead */
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+ /*
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+ * Field is either too large for an Integer, or a actually of type
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+ * buffer, so create a Buffer.
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+ */
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buffer_desc = acpi_ut_create_buffer_object(buffer_length);
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if (!buffer_desc) {
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diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
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index b5e9db85e881..a00b5f6b23ce 100644
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--- a/drivers/platform/x86/Kconfig
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+++ b/drivers/platform/x86/Kconfig
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@@ -622,6 +622,103 @@ config THINKPAD_ACPI_HOTKEY_POLL
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If you are not sure, say Y here. The driver enables polling only if
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it is strictly necessary to do so.
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+config SURFACE_ACPI
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+ depends on ACPI
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+ tristate "Microsoft Surface ACPI/Platform Drivers"
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+ ---help---
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+ ACPI and platform drivers for Microsoft Surface devices.
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+
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+config SURFACE_ACPI_SSH
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+ bool "Surface Serial Hub Driver"
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+ depends on SURFACE_ACPI
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+ depends on X86_INTEL_LPSS
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+ depends on SERIAL_8250_DW
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+ depends on SERIAL_8250_DMA
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+ depends on SERIAL_DEV_CTRL_TTYPORT
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+ select CRC_CCITT
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+ default y
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+ ---help---
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+ Surface Serial Hub driver for 5th generation (or later) Microsoft
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+ Surface devices.
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+
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+ This is the base driver for the embedded serial controller found on
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+ 5th generation (and later) Microsoft Surface devices (e.g. Book 2,
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+ Laptop, Laptop 2, Pro 2017, Pro 6, ...). This driver itself only
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+ provides access to the embedded controller and subsequent drivers are
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+ required for the respective functionalities.
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+
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+ If you have a 5th generation (or later) Microsoft Surface device, say
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+ Y or M here.
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+
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+config SURFACE_ACPI_SSH_DEBUG_DEVICE
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+ bool "Surface Serial Hub Debug Device"
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+ depends on SURFACE_ACPI_SSH
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+ default n
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+ ---help---
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+ Debug device for direct communication with the embedded controller
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+ found on 5th generation (and later) Microsoft Surface devices (e.g.
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+ Book 2, Laptop, Laptop 2, Pro 2017, Pro 6, ...) via sysfs.
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+
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+ If you are not sure, say N here.
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+
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+config SURFACE_ACPI_SAN
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+ bool "Surface ACPI Notify Driver"
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+ depends on SURFACE_ACPI_SSH
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+ default y
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+ ---help---
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+ Surface ACPI Notify driver for 5th generation (or later) Microsoft
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+ Surface devices.
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+
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+ This driver enables basic ACPI events and requests, such as battery
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+ status requests/events, thermal events, lid status, and possibly more,
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+ which would otherwise not work on these devices.
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+
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+ If you are not sure, say Y here.
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+
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+config SURFACE_ACPI_VHF
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+ bool "Surface Virtual HID Framework Driver"
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+ depends on SURFACE_ACPI_SSH
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+ depends on HID
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+ default y
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+ ---help---
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+ Surface Virtual HID Framework driver for 5th generation (or later)
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+ Microsoft Surface devices.
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+
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+ This driver provides support for the Microsoft Virtual HID framework,
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+ which is required for the Surface Laptop (1 and newer) keyboard.
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+
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+ If you are not sure, say Y here.
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+
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+config SURFACE_ACPI_DTX
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+ bool "Surface Detachment System (DTX) Driver"
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+ depends on SURFACE_ACPI_SSH
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+ depends on INPUT
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+ default y
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+ ---help---
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+ Surface Detachment System (DTX) driver for the Microsoft Surface Book
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+ 2. This driver provides support for proper detachment handling in
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+ user-space, status-events relating to the base and support for
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+ the safe-guard keeping the base attached when the discrete GPU
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+ contained in it is running via the special /dev/surface-dtx device.
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+
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+ Also provides a standard input device to provide SW_TABLET_MODE events
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+ upon device mode change.
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+
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+ If you are not sure, say Y here.
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+
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+config SURFACE_ACPI_SID
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+ bool "Surface Platform Integration Driver"
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+ depends on SURFACE_ACPI_SSH
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+ default y
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+ ---help---
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+ Surface Platform Integration Driver for the Microsoft Surface Devices.
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+ Currently only supports the Surface Book 2. This driver provides suport
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+ for setting performance-modes via the perf_mode sysfs attribute.
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+ Performance-modes directly influence the fan-profile of the device,
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+ allowing to choose between higher performance or quieter operation.
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+
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+ If you are not sure, say Y here.
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+
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config SENSORS_HDAPS
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tristate "Thinkpad Hard Drive Active Protection System (hdaps)"
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depends on INPUT
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diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
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index ce8da260c223..8412fe7a169d 100644
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--- a/drivers/platform/x86/Makefile
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+++ b/drivers/platform/x86/Makefile
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@@ -39,6 +39,7 @@ obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
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obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
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obj-$(CONFIG_IDEAPAD_LAPTOP) += ideapad-laptop.o
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obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
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+obj-$(CONFIG_SURFACE_ACPI) += surface_acpi.o
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obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
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obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
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obj-$(CONFIG_FUJITSU_TABLET) += fujitsu-tablet.o
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diff --git a/drivers/platform/x86/surface_acpi.c b/drivers/platform/x86/surface_acpi.c
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new file mode 100644
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index 000000000000..ab793f6774a0
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--- /dev/null
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+++ b/drivers/platform/x86/surface_acpi.c
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@@ -0,0 +1,3828 @@
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+#include <asm/unaligned.h>
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+#include <linux/acpi.h>
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+#include <linux/completion.h>
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+#include <linux/crc-ccitt.h>
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+#include <linux/delay.h>
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+#include <linux/device.h>
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+#include <linux/dmaengine.h>
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+#include <linux/fs.h>
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+#include <linux/hid.h>
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+#include <linux/input.h>
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+#include <linux/ioctl.h>
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+#include <linux/jiffies.h>
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+#include <linux/kernel.h>
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+#include <linux/kfifo.h>
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+#include <linux/miscdevice.h>
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+#include <linux/module.h>
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+#include <linux/moduleparam.h>
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+#include <linux/mutex.h>
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+#include <linux/platform_device.h>
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+#include <linux/pm.h>
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+#include <linux/poll.h>
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+#include <linux/rculist.h>
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+#include <linux/refcount.h>
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+#include <linux/serdev.h>
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+#include <linux/spinlock.h>
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+#include <linux/sysfs.h>
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+#include <linux/types.h>
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+#include <linux/workqueue.h>
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+
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+
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+#define USB_VENDOR_ID_MICROSOFT 0x045e
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+#define USB_DEVICE_ID_MS_VHF 0xf001
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+#define USB_DEVICE_ID_MS_SURFACE_BASE_2_INTEGRATION 0x0922
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+
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+#define SG5_PARAM_PERM (S_IRUGO | S_IWUSR)
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+
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+
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+/*************************************************************************
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+ * Surface Serial Hub driver (cross-driver interface)
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+ */
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+
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+#ifdef CONFIG_SURFACE_ACPI_SSH
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+
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+/*
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+ * Maximum request payload size in bytes.
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+ * Value based on ACPI (255 bytes minus header/status bytes).
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+ */
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+#define SURFACEGEN5_MAX_RQST_PAYLOAD (255 - 10)
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+
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+/*
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+ * Maximum response payload size in bytes.
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+ * Value based on ACPI (255 bytes minus header/status bytes).
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+ */
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+#define SURFACEGEN5_MAX_RQST_RESPONSE (255 - 4)
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+
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+#define SURFACEGEN5_RQID_EVENT_BITS 5
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+
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+#define SURFACEGEN5_EVENT_IMMEDIATE ((unsigned long) -1)
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+
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+
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+struct surfacegen5_buf {
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+ u8 cap;
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+ u8 len;
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+ u8 *data;
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+};
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+
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+struct surfacegen5_rqst {
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+ u8 tc;
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+ u8 iid;
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+ u8 cid;
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+ u8 snc;
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+ u8 cdl;
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+ u8 *pld;
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+};
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+
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+struct surfacegen5_event {
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+ u16 rqid;
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+ u8 tc;
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+ u8 iid;
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+ u8 cid;
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+ u8 len;
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+ u8 *pld;
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+};
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+
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+
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+typedef int (*surfacegen5_ec_event_handler_fn)(struct surfacegen5_event *event, void *data);
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+typedef unsigned long (*surfacegen5_ec_event_handler_delay)(struct surfacegen5_event *event, void *data);
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+
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+struct device_link *surfacegen5_ec_consumer_add(struct device *consumer, u32 flags);
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+int surfacegen5_ec_consumer_remove(struct device_link *link);
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+
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+int surfacegen5_ec_rqst(const struct surfacegen5_rqst *rqst, struct surfacegen5_buf *result);
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+
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+int surfacegen5_ec_enable_event_source(u8 tc, u8 unknown, u16 rqid);
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+int surfacegen5_ec_disable_event_source(u8 tc, u8 unknown, u16 rqid);
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+int surfacegen5_ec_remove_event_handler(u16 rqid);
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+int surfacegen5_ec_set_event_handler(u16 rqid, surfacegen5_ec_event_handler_fn fn, void *data);
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+int surfacegen5_ec_set_delayed_event_handler(u16 rqid,
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+ surfacegen5_ec_event_handler_fn fn,
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+ surfacegen5_ec_event_handler_delay delay, void *data);
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+
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+#endif /* CONFIG_SURFACE_ACPI_SSH */
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+
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+
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+/*************************************************************************
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+ * Surface Serial Hub Debug Device (cross-driver interface)
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+ */
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+
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+#ifdef CONFIG_SURFACE_ACPI_SSH
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+
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+int surfacegen5_ssh_sysfs_register(struct device *dev);
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+void surfacegen5_ssh_sysfs_unregister(struct device *dev);
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+
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+#endif /* CONFIG_SURFACE_ACPI_SSH */
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+
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+
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+/*************************************************************************
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+ * Surface Serial Hub driver (private implementation)
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+ */
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+
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+#ifdef CONFIG_SURFACE_ACPI_SSH
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+
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+#define SG5_RQST_TAG_FULL "surfacegen5_ec_rqst: "
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+#define SG5_RQST_TAG "rqst: "
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+#define SG5_EVENT_TAG "event: "
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+#define SG5_RECV_TAG "recv: "
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+
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+#define SG5_SUPPORTED_FLOW_CONTROL_MASK (~((u8) ACPI_UART_FLOW_CONTROL_HW))
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+
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+#define SG5_BYTELEN_SYNC 2
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+#define SG5_BYTELEN_TERM 2
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+#define SG5_BYTELEN_CRC 2
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+#define SG5_BYTELEN_CTRL 4 // command-header, ACK, or RETRY
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+#define SG5_BYTELEN_CMDFRAME 8 // without payload
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+
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+#define SG5_MAX_WRITE ( \
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+ SG5_BYTELEN_SYNC \
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+ + SG5_BYTELEN_CTRL \
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+ + SG5_BYTELEN_CRC \
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+ + SG5_BYTELEN_CMDFRAME \
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+ + SURFACEGEN5_MAX_RQST_PAYLOAD \
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+ + SG5_BYTELEN_CRC \
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+)
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+
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+#define SG5_MSG_LEN_CTRL ( \
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+ SG5_BYTELEN_SYNC \
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+ + SG5_BYTELEN_CTRL \
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+ + SG5_BYTELEN_CRC \
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+ + SG5_BYTELEN_TERM \
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+)
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+
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+#define SG5_MSG_LEN_CMD_BASE ( \
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+ SG5_BYTELEN_SYNC \
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+ + SG5_BYTELEN_CTRL \
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+ + SG5_BYTELEN_CRC \
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+ + SG5_BYTELEN_CRC \
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+) // without payload and command-frame
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+
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+#define SG5_WRITE_TIMEOUT msecs_to_jiffies(1000)
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+#define SG5_READ_TIMEOUT msecs_to_jiffies(1000)
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+#define SG5_NUM_RETRY 3
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+
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+#define SG5_WRITE_BUF_LEN SG5_MAX_WRITE
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+#define SG5_READ_BUF_LEN 512 // must be power of 2
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+#define SG5_EVAL_BUF_LEN SG5_MAX_WRITE // also works for reading
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+
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+#define SG5_FRAME_TYPE_CMD 0x80
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+#define SG5_FRAME_TYPE_ACK 0x40
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+#define SG5_FRAME_TYPE_RETRY 0x04
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+
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+#define SG5_FRAME_OFFS_CTRL SG5_BYTELEN_SYNC
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+#define SG5_FRAME_OFFS_CTRL_CRC (SG5_FRAME_OFFS_CTRL + SG5_BYTELEN_CTRL)
|
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+#define SG5_FRAME_OFFS_TERM (SG5_FRAME_OFFS_CTRL_CRC + SG5_BYTELEN_CRC)
|
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+#define SG5_FRAME_OFFS_CMD SG5_FRAME_OFFS_TERM // either TERM or CMD
|
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+#define SG5_FRAME_OFFS_CMD_PLD (SG5_FRAME_OFFS_CMD + SG5_BYTELEN_CMDFRAME)
|
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+
|
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+/*
|
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+ * A note on Request IDs (RQIDs):
|
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+ * 0x0000 is not a valid RQID
|
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+ * 0x0001 is valid, but reserved for Surface Laptop keyboard events
|
|
+ */
|
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+#define SG5_NUM_EVENT_TYPES ((1 << SURFACEGEN5_RQID_EVENT_BITS) - 1)
|
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+
|
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+/*
|
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+ * Sync: aa 55
|
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+ * Terminate: ff ff
|
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+ *
|
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+ * Request Message: sync cmd-hdr crc(cmd-hdr) cmd-rqst-frame crc(cmd-rqst-frame)
|
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+ * Ack Message: sync ack crc(ack) terminate
|
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+ * Retry Message: sync retry crc(retry) terminate
|
|
+ * Response Message: sync cmd-hdr crc(cmd-hdr) cmd-resp-frame crc(cmd-resp-frame)
|
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+ *
|
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+ * Command Header: 80 LEN 00 SEQ
|
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+ * Ack: 40 00 00 SEQ
|
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+ * Retry: 04 00 00 00
|
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+ * Command Request Frame: 80 RTC 01 00 RIID RQID RCID PLD
|
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+ * Command Response Frame: 80 RTC 00 01 RIID RQID RCID PLD
|
|
+ */
|
|
+
|
|
+struct surfacegen5_frame_ctrl {
|
|
+ u8 type;
|
|
+ u8 len; // without crc
|
|
+ u8 pad;
|
|
+ u8 seq;
|
|
+} __packed;
|
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+
|
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+struct surfacegen5_frame_cmd {
|
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+ u8 type;
|
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+ u8 tc;
|
|
+ u8 unknown1;
|
|
+ u8 unknown2;
|
|
+ u8 iid;
|
|
+ u8 rqid_lo; // id for request/response matching (low byte)
|
|
+ u8 rqid_hi; // id for request/response matching (high byte)
|
|
+ u8 cid;
|
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+} __packed;
|
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+
|
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+
|
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+enum surfacegen5_ec_state {
|
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+ SG5_EC_UNINITIALIZED,
|
|
+ SG5_EC_INITIALIZED,
|
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+ SG5_EC_SUSPENDED,
|
|
+};
|
|
+
|
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+struct surfacegen5_ec_counters {
|
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+ u8 seq; // control sequence id
|
|
+ u16 rqid; // id for request/response matching
|
|
+};
|
|
+
|
|
+struct surfacegen5_ec_writer {
|
|
+ u8 *data;
|
|
+ u8 *ptr;
|
|
+} __packed;
|
|
+
|
|
+enum surfacegen5_ec_receiver_state {
|
|
+ SG5_RCV_DISCARD,
|
|
+ SG5_RCV_CONTROL,
|
|
+ SG5_RCV_COMMAND,
|
|
+};
|
|
+
|
|
+struct surfacegen5_ec_receiver {
|
|
+ spinlock_t lock;
|
|
+ enum surfacegen5_ec_receiver_state state;
|
|
+ struct completion signal;
|
|
+ struct kfifo fifo;
|
|
+ struct {
|
|
+ bool pld;
|
|
+ u8 seq;
|
|
+ u16 rqid;
|
|
+ } expect;
|
|
+ struct {
|
|
+ u16 cap;
|
|
+ u16 len;
|
|
+ u8 *ptr;
|
|
+ } eval_buf;
|
|
+};
|
|
+
|
|
+struct surfacegen5_ec_event_handler {
|
|
+ surfacegen5_ec_event_handler_fn handler;
|
|
+ surfacegen5_ec_event_handler_delay delay;
|
|
+ void *data;
|
|
+};
|
|
+
|
|
+struct surfacegen5_ec_events {
|
|
+ spinlock_t lock;
|
|
+ struct workqueue_struct *queue_ack;
|
|
+ struct workqueue_struct *queue_evt;
|
|
+ struct surfacegen5_ec_event_handler handler[SG5_NUM_EVENT_TYPES];
|
|
+};
|
|
+
|
|
+struct surfacegen5_ec {
|
|
+ struct mutex lock;
|
|
+ enum surfacegen5_ec_state state;
|
|
+ struct serdev_device *serdev;
|
|
+ struct surfacegen5_ec_counters counter;
|
|
+ struct surfacegen5_ec_writer writer;
|
|
+ struct surfacegen5_ec_receiver receiver;
|
|
+ struct surfacegen5_ec_events events;
|
|
+};
|
|
+
|
|
+struct surfacegen5_fifo_packet {
|
|
+ u8 type; // packet type (ACK/RETRY/CMD)
|
|
+ u8 seq;
|
|
+ u8 len;
|
|
+};
|
|
+
|
|
+struct surfacegen5_event_work {
|
|
+ refcount_t refcount;
|
|
+ struct surfacegen5_ec *ec;
|
|
+ struct work_struct work_ack;
|
|
+ struct delayed_work work_evt;
|
|
+ struct surfacegen5_event event;
|
|
+ u8 seq;
|
|
+};
|
|
+
|
|
+
|
|
+static struct surfacegen5_ec surfacegen5_ec = {
|
|
+ .lock = __MUTEX_INITIALIZER(surfacegen5_ec.lock),
|
|
+ .state = SG5_EC_UNINITIALIZED,
|
|
+ .serdev = NULL,
|
|
+ .counter = {
|
|
+ .seq = 0,
|
|
+ .rqid = 0,
|
|
+ },
|
|
+ .writer = {
|
|
+ .data = NULL,
|
|
+ .ptr = NULL,
|
|
+ },
|
|
+ .receiver = {
|
|
+ .lock = __SPIN_LOCK_UNLOCKED(),
|
|
+ .state = SG5_RCV_DISCARD,
|
|
+ .expect = {},
|
|
+ },
|
|
+ .events = {
|
|
+ .lock = __SPIN_LOCK_UNLOCKED(),
|
|
+ .handler = {},
|
|
+ }
|
|
+};
|
|
+
|
|
+
|
|
+static int surfacegen5_ec_rqst_unlocked(struct surfacegen5_ec *ec,
|
|
+ const struct surfacegen5_rqst *rqst,
|
|
+ struct surfacegen5_buf *result);
|
|
+
|
|
+
|
|
+inline static struct surfacegen5_ec *surfacegen5_ec_acquire(void)
|
|
+{
|
|
+ struct surfacegen5_ec *ec = &surfacegen5_ec;
|
|
+
|
|
+ mutex_lock(&ec->lock);
|
|
+ return ec;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ec_release(struct surfacegen5_ec *ec)
|
|
+{
|
|
+ mutex_unlock(&ec->lock);
|
|
+}
|
|
+
|
|
+inline static struct surfacegen5_ec *surfacegen5_ec_acquire_init(void)
|
|
+{
|
|
+ struct surfacegen5_ec *ec = surfacegen5_ec_acquire();
|
|
+
|
|
+ if (ec->state == SG5_EC_UNINITIALIZED) {
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ return ec;
|
|
+}
|
|
+
|
|
+struct device_link *surfacegen5_ec_consumer_add(struct device *consumer, u32 flags)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ struct device_link *link;
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ return ERR_PTR(-ENXIO);
|
|
+ }
|
|
+
|
|
+ link = device_link_add(consumer, &ec->serdev->dev, flags);
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return link;
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_consumer_remove(struct device_link *link)
|
|
+{
|
|
+ struct surfacegen5_ec *ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ device_link_del(link);
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+inline static u16 surfacegen5_rqid_to_rqst(u16 rqid) {
|
|
+ return rqid << SURFACEGEN5_RQID_EVENT_BITS;
|
|
+}
|
|
+
|
|
+inline static bool surfacegen5_rqid_is_event(u16 rqid) {
|
|
+ const u16 mask = (1 << SURFACEGEN5_RQID_EVENT_BITS) - 1;
|
|
+ return rqid != 0 && (rqid | mask) == mask;
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_enable_event_source(u8 tc, u8 unknown, u16 rqid)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+
|
|
+ u8 pld[4] = { tc, unknown, rqid & 0xff, rqid >> 8 };
|
|
+ u8 buf[1] = { 0x00 };
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x01,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x0b,
|
|
+ .snc = 0x01,
|
|
+ .cdl = 0x04,
|
|
+ .pld = pld,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ result.cap = ARRAY_SIZE(buf),
|
|
+ result.len = 0,
|
|
+ result.data = buf,
|
|
+ };
|
|
+
|
|
+ int status;
|
|
+
|
|
+ // only allow RQIDs that lie within event spectrum
|
|
+ if (!surfacegen5_rqid_is_event(rqid)) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ printk(KERN_WARNING SG5_RQST_TAG_FULL "embedded controller is uninitialized\n");
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ if (ec->state == SG5_EC_SUSPENDED) {
|
|
+ dev_warn(&ec->serdev->dev, SG5_RQST_TAG "embedded controller is suspended\n");
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_rqst_unlocked(ec, &rqst, &result);
|
|
+
|
|
+ if (buf[0] != 0x00) {
|
|
+ dev_warn(&ec->serdev->dev,
|
|
+ "unexpected result while enabling event source: 0x%02x\n",
|
|
+ buf[0]);
|
|
+ }
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return status;
|
|
+
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_disable_event_source(u8 tc, u8 unknown, u16 rqid)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+
|
|
+ u8 pld[4] = { tc, unknown, rqid & 0xff, rqid >> 8 };
|
|
+ u8 buf[1] = { 0x00 };
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x01,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x0c,
|
|
+ .snc = 0x01,
|
|
+ .cdl = 0x04,
|
|
+ .pld = pld,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ result.cap = ARRAY_SIZE(buf),
|
|
+ result.len = 0,
|
|
+ result.data = buf,
|
|
+ };
|
|
+
|
|
+ int status;
|
|
+
|
|
+ // only allow RQIDs that lie within event spectrum
|
|
+ if (!surfacegen5_rqid_is_event(rqid)) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ printk(KERN_WARNING SG5_RQST_TAG_FULL "embedded controller is uninitialized\n");
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ if (ec->state == SG5_EC_SUSPENDED) {
|
|
+ dev_warn(&ec->serdev->dev, SG5_RQST_TAG "embedded controller is suspended\n");
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_rqst_unlocked(ec, &rqst, &result);
|
|
+
|
|
+ if (buf[0] != 0x00) {
|
|
+ dev_warn(&ec->serdev->dev,
|
|
+ "unexpected result while disabling event source: 0x%02x\n",
|
|
+ buf[0]);
|
|
+ }
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_set_delayed_event_handler(
|
|
+ u16 rqid, surfacegen5_ec_event_handler_fn fn,
|
|
+ surfacegen5_ec_event_handler_delay delay,
|
|
+ void *data)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ unsigned long flags;
|
|
+
|
|
+ if (!surfacegen5_rqid_is_event(rqid)) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ spin_lock_irqsave(&ec->events.lock, flags);
|
|
+
|
|
+ // 0 is not a valid event RQID
|
|
+ ec->events.handler[rqid - 1].handler = fn;
|
|
+ ec->events.handler[rqid - 1].delay = delay;
|
|
+ ec->events.handler[rqid - 1].data = data;
|
|
+
|
|
+ spin_unlock_irqrestore(&ec->events.lock, flags);
|
|
+ surfacegen5_ec_release(ec);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_set_event_handler(
|
|
+ u16 rqid, surfacegen5_ec_event_handler_fn fn, void *data)
|
|
+{
|
|
+ return surfacegen5_ec_set_delayed_event_handler(rqid, fn, NULL, data);
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_remove_event_handler(u16 rqid)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ unsigned long flags;
|
|
+
|
|
+ if (!surfacegen5_rqid_is_event(rqid)) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ spin_lock_irqsave(&ec->events.lock, flags);
|
|
+
|
|
+ // 0 is not a valid event RQID
|
|
+ ec->events.handler[rqid - 1].handler = NULL;
|
|
+ ec->events.handler[rqid - 1].delay = NULL;
|
|
+ ec->events.handler[rqid - 1].data = NULL;
|
|
+
|
|
+ spin_unlock_irqrestore(&ec->events.lock, flags);
|
|
+ surfacegen5_ec_release(ec);
|
|
+
|
|
+ /*
|
|
+ * Make sure that the handler is not in use any more after we've
|
|
+ * removed it.
|
|
+ */
|
|
+ flush_workqueue(ec->events.queue_evt);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+inline static u16 surfacegen5_ssh_crc(const u8 *buf, size_t size)
|
|
+{
|
|
+ return crc_ccitt_false(0xffff, buf, size);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_u16(struct surfacegen5_ec_writer *writer, u16 in)
|
|
+{
|
|
+ put_unaligned_le16(in, writer->ptr);
|
|
+ writer->ptr += 2;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_crc(struct surfacegen5_ec_writer *writer,
|
|
+ const u8 *buf, size_t size)
|
|
+{
|
|
+ surfacegen5_ssh_write_u16(writer, surfacegen5_ssh_crc(buf, size));
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_syn(struct surfacegen5_ec_writer *writer)
|
|
+{
|
|
+ u8 *w = writer->ptr;
|
|
+
|
|
+ *w++ = 0xaa;
|
|
+ *w++ = 0x55;
|
|
+
|
|
+ writer->ptr = w;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_ter(struct surfacegen5_ec_writer *writer)
|
|
+{
|
|
+ u8 *w = writer->ptr;
|
|
+
|
|
+ *w++ = 0xff;
|
|
+ *w++ = 0xff;
|
|
+
|
|
+ writer->ptr = w;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_buf(struct surfacegen5_ec_writer *writer,
|
|
+ u8 *in, size_t len)
|
|
+{
|
|
+ writer->ptr = memcpy(writer->ptr, in, len) + len;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_hdr(struct surfacegen5_ec_writer *writer,
|
|
+ const struct surfacegen5_rqst *rqst,
|
|
+ struct surfacegen5_ec *ec)
|
|
+{
|
|
+ struct surfacegen5_frame_ctrl *hdr = (struct surfacegen5_frame_ctrl *)writer->ptr;
|
|
+ u8 *begin = writer->ptr;
|
|
+
|
|
+ hdr->type = SG5_FRAME_TYPE_CMD;
|
|
+ hdr->len = SG5_BYTELEN_CMDFRAME + rqst->cdl; // without CRC
|
|
+ hdr->pad = 0x00;
|
|
+ hdr->seq = ec->counter.seq;
|
|
+
|
|
+ writer->ptr += sizeof(*hdr);
|
|
+
|
|
+ surfacegen5_ssh_write_crc(writer, begin, writer->ptr - begin);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_cmd(struct surfacegen5_ec_writer *writer,
|
|
+ const struct surfacegen5_rqst *rqst,
|
|
+ struct surfacegen5_ec *ec)
|
|
+{
|
|
+ struct surfacegen5_frame_cmd *cmd = (struct surfacegen5_frame_cmd *)writer->ptr;
|
|
+ u8 *begin = writer->ptr;
|
|
+
|
|
+ u16 rqid = surfacegen5_rqid_to_rqst(ec->counter.rqid);
|
|
+ u8 rqid_lo = rqid & 0xFF;
|
|
+ u8 rqid_hi = rqid >> 8;
|
|
+
|
|
+ cmd->type = SG5_FRAME_TYPE_CMD;
|
|
+ cmd->tc = rqst->tc;
|
|
+ cmd->unknown1 = 0x01;
|
|
+ cmd->unknown2 = 0x00;
|
|
+ cmd->iid = rqst->iid;
|
|
+ cmd->rqid_lo = rqid_lo;
|
|
+ cmd->rqid_hi = rqid_hi;
|
|
+ cmd->cid = rqst->cid;
|
|
+
|
|
+ writer->ptr += sizeof(*cmd);
|
|
+
|
|
+ surfacegen5_ssh_write_buf(writer, rqst->pld, rqst->cdl);
|
|
+ surfacegen5_ssh_write_crc(writer, begin, writer->ptr - begin);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_ack(struct surfacegen5_ec_writer *writer, u8 seq)
|
|
+{
|
|
+ struct surfacegen5_frame_ctrl *ack = (struct surfacegen5_frame_ctrl *)writer->ptr;
|
|
+ u8 *begin = writer->ptr;
|
|
+
|
|
+ ack->type = SG5_FRAME_TYPE_ACK;
|
|
+ ack->len = 0x00;
|
|
+ ack->pad = 0x00;
|
|
+ ack->seq = seq;
|
|
+
|
|
+ writer->ptr += sizeof(*ack);
|
|
+
|
|
+ surfacegen5_ssh_write_crc(writer, begin, writer->ptr - begin);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_writer_reset(struct surfacegen5_ec_writer *writer)
|
|
+{
|
|
+ writer->ptr = writer->data;
|
|
+}
|
|
+
|
|
+inline static int surfacegen5_ssh_writer_flush(struct surfacegen5_ec *ec)
|
|
+{
|
|
+ struct surfacegen5_ec_writer *writer = &ec->writer;
|
|
+ struct serdev_device *serdev = ec->serdev;
|
|
+ int status;
|
|
+
|
|
+ size_t len = writer->ptr - writer->data;
|
|
+
|
|
+ dev_dbg(&ec->serdev->dev, "sending message\n");
|
|
+ print_hex_dump_debug("send: ", DUMP_PREFIX_OFFSET, 16, 1,
|
|
+ writer->data, writer->ptr - writer->data, false);
|
|
+
|
|
+ status = serdev_device_write(serdev, writer->data, len, SG5_WRITE_TIMEOUT);
|
|
+ return status >= 0 ? 0 : status;
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_msg_cmd(struct surfacegen5_ec *ec,
|
|
+ const struct surfacegen5_rqst *rqst)
|
|
+{
|
|
+ surfacegen5_ssh_writer_reset(&ec->writer);
|
|
+ surfacegen5_ssh_write_syn(&ec->writer);
|
|
+ surfacegen5_ssh_write_hdr(&ec->writer, rqst, ec);
|
|
+ surfacegen5_ssh_write_cmd(&ec->writer, rqst, ec);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_write_msg_ack(struct surfacegen5_ec *ec, u8 seq)
|
|
+{
|
|
+ surfacegen5_ssh_writer_reset(&ec->writer);
|
|
+ surfacegen5_ssh_write_syn(&ec->writer);
|
|
+ surfacegen5_ssh_write_ack(&ec->writer, seq);
|
|
+ surfacegen5_ssh_write_ter(&ec->writer);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_receiver_restart(struct surfacegen5_ec *ec,
|
|
+ const struct surfacegen5_rqst *rqst)
|
|
+{
|
|
+ unsigned long flags;
|
|
+
|
|
+ spin_lock_irqsave(&ec->receiver.lock, flags);
|
|
+ reinit_completion(&ec->receiver.signal);
|
|
+ ec->receiver.state = SG5_RCV_CONTROL;
|
|
+ ec->receiver.expect.pld = rqst->snc;
|
|
+ ec->receiver.expect.seq = ec->counter.seq;
|
|
+ ec->receiver.expect.rqid = surfacegen5_rqid_to_rqst(ec->counter.rqid);
|
|
+ ec->receiver.eval_buf.len = 0;
|
|
+ spin_unlock_irqrestore(&ec->receiver.lock, flags);
|
|
+}
|
|
+
|
|
+inline static void surfacegen5_ssh_receiver_discard(struct surfacegen5_ec *ec)
|
|
+{
|
|
+ unsigned long flags;
|
|
+
|
|
+ spin_lock_irqsave(&ec->receiver.lock, flags);
|
|
+ ec->receiver.state = SG5_RCV_DISCARD;
|
|
+ ec->receiver.eval_buf.len = 0;
|
|
+ kfifo_reset(&ec->receiver.fifo);
|
|
+ spin_unlock_irqrestore(&ec->receiver.lock, flags);
|
|
+}
|
|
+
|
|
+static int surfacegen5_ec_rqst_unlocked(struct surfacegen5_ec *ec,
|
|
+ const struct surfacegen5_rqst *rqst,
|
|
+ struct surfacegen5_buf *result)
|
|
+{
|
|
+ struct device *dev = &ec->serdev->dev;
|
|
+ struct surfacegen5_fifo_packet packet = {};
|
|
+ int status;
|
|
+ int try;
|
|
+ unsigned int rem;
|
|
+
|
|
+ if (rqst->cdl > SURFACEGEN5_MAX_RQST_PAYLOAD) {
|
|
+ dev_err(dev, SG5_RQST_TAG "request payload too large\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ // write command in buffer, we may need it multiple times
|
|
+ surfacegen5_ssh_write_msg_cmd(ec, rqst);
|
|
+ surfacegen5_ssh_receiver_restart(ec, rqst);
|
|
+
|
|
+ // send command, try to get an ack response
|
|
+ for (try = 0; try < SG5_NUM_RETRY; try++) {
|
|
+ status = surfacegen5_ssh_writer_flush(ec);
|
|
+ if (status) {
|
|
+ goto ec_rqst_out;
|
|
+ }
|
|
+
|
|
+ rem = wait_for_completion_timeout(&ec->receiver.signal, SG5_READ_TIMEOUT);
|
|
+ if (rem) {
|
|
+ // completion assures valid packet, thus ignore returned length
|
|
+ (void) !kfifo_out(&ec->receiver.fifo, &packet, sizeof(packet));
|
|
+
|
|
+ if (packet.type == SG5_FRAME_TYPE_ACK) {
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ // check if we ran out of tries?
|
|
+ if (try >= SG5_NUM_RETRY) {
|
|
+ dev_err(dev, SG5_RQST_TAG "communication failed %d times, giving up\n", try);
|
|
+ status = -EIO;
|
|
+ goto ec_rqst_out;
|
|
+ }
|
|
+
|
|
+ ec->counter.seq += 1;
|
|
+ ec->counter.rqid += 1;
|
|
+
|
|
+ // get command response/payload
|
|
+ if (rqst->snc && result) {
|
|
+ rem = wait_for_completion_timeout(&ec->receiver.signal, SG5_READ_TIMEOUT);
|
|
+ if (rem) {
|
|
+ // completion assures valid packet, thus ignore returned length
|
|
+ (void) !kfifo_out(&ec->receiver.fifo, &packet, sizeof(packet));
|
|
+
|
|
+ if (result->cap < packet.len) {
|
|
+ status = -EINVAL;
|
|
+ goto ec_rqst_out;
|
|
+ }
|
|
+
|
|
+ // completion assures valid packet, thus ignore returned length
|
|
+ (void) !kfifo_out(&ec->receiver.fifo, result->data, packet.len);
|
|
+ result->len = packet.len;
|
|
+ } else {
|
|
+ dev_err(dev, SG5_RQST_TAG "communication timed out\n");
|
|
+ status = -EIO;
|
|
+ goto ec_rqst_out;
|
|
+ }
|
|
+
|
|
+ // send ACK
|
|
+ surfacegen5_ssh_write_msg_ack(ec, packet.seq);
|
|
+ status = surfacegen5_ssh_writer_flush(ec);
|
|
+ if (status) {
|
|
+ goto ec_rqst_out;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ec_rqst_out:
|
|
+ surfacegen5_ssh_receiver_discard(ec);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+int surfacegen5_ec_rqst(const struct surfacegen5_rqst *rqst, struct surfacegen5_buf *result)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ int status;
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ printk(KERN_WARNING SG5_RQST_TAG_FULL "embedded controller is uninitialized\n");
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ if (ec->state == SG5_EC_SUSPENDED) {
|
|
+ dev_warn(&ec->serdev->dev, SG5_RQST_TAG "embedded controller is suspended\n");
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return -EPERM;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_rqst_unlocked(ec, rqst, result);
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+
|
|
+static int surfacegen5_ssh_ec_resume(struct surfacegen5_ec *ec)
|
|
+{
|
|
+ u8 buf[1] = { 0x00 };
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x01,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x16,
|
|
+ .snc = 0x01,
|
|
+ .cdl = 0x00,
|
|
+ .pld = NULL,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ result.cap = ARRAY_SIZE(buf),
|
|
+ result.len = 0,
|
|
+ result.data = buf,
|
|
+ };
|
|
+
|
|
+ int status = surfacegen5_ec_rqst_unlocked(ec, &rqst, &result);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (buf[0] != 0x00) {
|
|
+ dev_warn(&ec->serdev->dev,
|
|
+ "unexpected result while trying to resume EC: 0x%02x\n",
|
|
+ buf[0]);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_ec_suspend(struct surfacegen5_ec *ec)
|
|
+{
|
|
+ u8 buf[1] = { 0x00 };
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x01,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x15,
|
|
+ .snc = 0x01,
|
|
+ .cdl = 0x00,
|
|
+ .pld = NULL,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ result.cap = ARRAY_SIZE(buf),
|
|
+ result.len = 0,
|
|
+ result.data = buf,
|
|
+ };
|
|
+
|
|
+ int status = surfacegen5_ec_rqst_unlocked(ec, &rqst, &result);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (buf[0] != 0x00) {
|
|
+ dev_warn(&ec->serdev->dev,
|
|
+ "unexpected result while trying to suspend EC: 0x%02x\n",
|
|
+ buf[0]);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+inline static bool surfacegen5_ssh_is_valid_syn(const u8 *ptr)
|
|
+{
|
|
+ return ptr[0] == 0xaa && ptr[1] == 0x55;
|
|
+}
|
|
+
|
|
+inline static bool surfacegen5_ssh_is_valid_ter(const u8 *ptr)
|
|
+{
|
|
+ return ptr[0] == 0xff && ptr[1] == 0xff;
|
|
+}
|
|
+
|
|
+inline static bool surfacegen5_ssh_is_valid_crc(const u8 *begin, const u8 *end)
|
|
+{
|
|
+ u16 crc = surfacegen5_ssh_crc(begin, end - begin);
|
|
+ return (end[0] == (crc & 0xff)) && (end[1] == (crc >> 8));
|
|
+}
|
|
+
|
|
+
|
|
+static int surfacegen5_ssh_send_ack(struct surfacegen5_ec *ec, u8 seq)
|
|
+{
|
|
+ int status;
|
|
+ u8 buf[SG5_MSG_LEN_CTRL];
|
|
+ u16 crc;
|
|
+
|
|
+ buf[0] = 0xaa;
|
|
+ buf[1] = 0x55;
|
|
+ buf[2] = 0x40;
|
|
+ buf[3] = 0x00;
|
|
+ buf[4] = 0x00;
|
|
+ buf[5] = seq;
|
|
+
|
|
+ crc = surfacegen5_ssh_crc(buf + SG5_FRAME_OFFS_CTRL, SG5_BYTELEN_CTRL);
|
|
+ buf[6] = crc & 0xff;
|
|
+ buf[7] = crc >> 8;
|
|
+
|
|
+ buf[8] = 0xff;
|
|
+ buf[9] = 0xff;
|
|
+
|
|
+ dev_dbg(&ec->serdev->dev, "sending message\n");
|
|
+ print_hex_dump_debug("send: ", DUMP_PREFIX_OFFSET, 16, 1,
|
|
+ buf, SG5_MSG_LEN_CTRL, false);
|
|
+
|
|
+ status = serdev_device_write(ec->serdev, buf, SG5_MSG_LEN_CTRL, SG5_WRITE_TIMEOUT);
|
|
+ return status >= 0 ? 0 : status;
|
|
+}
|
|
+
|
|
+static void surfacegen5_event_work_ack_handler(struct work_struct *_work)
|
|
+{
|
|
+ struct surfacegen5_event_work *work;
|
|
+ struct surfacegen5_event *event;
|
|
+ struct surfacegen5_ec *ec;
|
|
+ struct device *dev;
|
|
+ int status;
|
|
+
|
|
+ work = container_of(_work, struct surfacegen5_event_work, work_ack);
|
|
+ event = &work->event;
|
|
+ ec = work->ec;
|
|
+ dev = &ec->serdev->dev;
|
|
+
|
|
+ // make sure we load a fresh ec state
|
|
+ smp_mb();
|
|
+
|
|
+ if (ec->state == SG5_EC_INITIALIZED) {
|
|
+ status = surfacegen5_ssh_send_ack(ec, work->seq);
|
|
+ if (status) {
|
|
+ dev_err(dev, SG5_EVENT_TAG "failed to send ACK: %d\n", status);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (refcount_dec_and_test(&work->refcount)) {
|
|
+ kfree(work);
|
|
+ }
|
|
+}
|
|
+
|
|
+static void surfacegen5_event_work_evt_handler(struct work_struct *_work)
|
|
+{
|
|
+ struct delayed_work *dwork = (struct delayed_work *)_work;
|
|
+ struct surfacegen5_event_work *work;
|
|
+ struct surfacegen5_event *event;
|
|
+ struct surfacegen5_ec *ec;
|
|
+ struct device *dev;
|
|
+ unsigned long flags;
|
|
+
|
|
+ surfacegen5_ec_event_handler_fn handler;
|
|
+ void *handler_data;
|
|
+
|
|
+ int status = 0;
|
|
+
|
|
+ work = container_of(dwork, struct surfacegen5_event_work, work_evt);
|
|
+ event = &work->event;
|
|
+ ec = work->ec;
|
|
+ dev = &ec->serdev->dev;
|
|
+
|
|
+ spin_lock_irqsave(&ec->events.lock, flags);
|
|
+ handler = ec->events.handler[event->rqid - 1].handler;
|
|
+ handler_data = ec->events.handler[event->rqid - 1].data;
|
|
+ spin_unlock_irqrestore(&ec->events.lock, flags);
|
|
+
|
|
+ /*
|
|
+ * During handler removal or driver release, we ensure every event gets
|
|
+ * handled before return of that function. Thus a handler obtained here is
|
|
+ * guaranteed to be valid at least until this function returns.
|
|
+ */
|
|
+
|
|
+ if (handler) {
|
|
+ status = handler(event, handler_data);
|
|
+ } else {
|
|
+ dev_warn(dev, SG5_EVENT_TAG "unhandled event (rqid: %04x)\n", event->rqid);
|
|
+ }
|
|
+
|
|
+ if (status) {
|
|
+ dev_err(dev, SG5_EVENT_TAG "error handling event: %d\n", status);
|
|
+ }
|
|
+
|
|
+ if (refcount_dec_and_test(&work->refcount)) {
|
|
+ kfree(work);
|
|
+ }
|
|
+}
|
|
+
|
|
+static void surfacegen5_ssh_handle_event(struct surfacegen5_ec *ec, const u8 *buf)
|
|
+{
|
|
+ struct device *dev = &ec->serdev->dev;
|
|
+ const struct surfacegen5_frame_ctrl *ctrl;
|
|
+ const struct surfacegen5_frame_cmd *cmd;
|
|
+ struct surfacegen5_event_work *work;
|
|
+ unsigned long flags;
|
|
+ u16 pld_len;
|
|
+
|
|
+ surfacegen5_ec_event_handler_delay delay_fn;
|
|
+ void *handler_data;
|
|
+ unsigned long delay = 0;
|
|
+
|
|
+ ctrl = (const struct surfacegen5_frame_ctrl *)(buf + SG5_FRAME_OFFS_CTRL);
|
|
+ cmd = (const struct surfacegen5_frame_cmd *)(buf + SG5_FRAME_OFFS_CMD);
|
|
+
|
|
+ pld_len = ctrl->len - SG5_BYTELEN_CMDFRAME;
|
|
+
|
|
+ work = kzalloc(sizeof(struct surfacegen5_event_work) + pld_len, GFP_ATOMIC);
|
|
+ if (!work) {
|
|
+ dev_warn(dev, SG5_EVENT_TAG "failed to allocate memory, dropping event\n");
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ refcount_set(&work->refcount, 2);
|
|
+ work->ec = ec;
|
|
+ work->seq = ctrl->seq;
|
|
+ work->event.rqid = (cmd->rqid_hi << 8) | cmd->rqid_lo;
|
|
+ work->event.tc = cmd->tc;
|
|
+ work->event.iid = cmd->iid;
|
|
+ work->event.cid = cmd->cid;
|
|
+ work->event.len = pld_len;
|
|
+ work->event.pld = ((u8*) work) + sizeof(struct surfacegen5_event_work);
|
|
+
|
|
+ memcpy(work->event.pld, buf + SG5_FRAME_OFFS_CMD_PLD, pld_len);
|
|
+
|
|
+ INIT_WORK(&work->work_ack, surfacegen5_event_work_ack_handler);
|
|
+ queue_work(ec->events.queue_ack, &work->work_ack);
|
|
+
|
|
+ spin_lock_irqsave(&ec->events.lock, flags);
|
|
+ handler_data = ec->events.handler[work->event.rqid - 1].data;
|
|
+ delay_fn = ec->events.handler[work->event.rqid - 1].delay;
|
|
+ if (delay_fn) {
|
|
+ delay = delay_fn(&work->event, handler_data);
|
|
+ }
|
|
+ spin_unlock_irqrestore(&ec->events.lock, flags);
|
|
+
|
|
+ // immediate execution for high priority events (e.g. keyboard)
|
|
+ if (delay == SURFACEGEN5_EVENT_IMMEDIATE) {
|
|
+ surfacegen5_event_work_evt_handler(&work->work_evt.work);
|
|
+ } else {
|
|
+ INIT_DELAYED_WORK(&work->work_evt, surfacegen5_event_work_evt_handler);
|
|
+ queue_delayed_work(ec->events.queue_evt, &work->work_evt, delay);
|
|
+ }
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_receive_msg_ctrl(struct surfacegen5_ec *ec,
|
|
+ const u8 *buf, size_t size)
|
|
+{
|
|
+ struct device *dev = &ec->serdev->dev;
|
|
+ struct surfacegen5_ec_receiver *rcv = &ec->receiver;
|
|
+ const struct surfacegen5_frame_ctrl *ctrl;
|
|
+ struct surfacegen5_fifo_packet packet;
|
|
+
|
|
+ const u8 *ctrl_begin = buf + SG5_FRAME_OFFS_CTRL;
|
|
+ const u8 *ctrl_end = buf + SG5_FRAME_OFFS_CTRL_CRC;
|
|
+
|
|
+ ctrl = (const struct surfacegen5_frame_ctrl *)(ctrl_begin);
|
|
+
|
|
+ // actual length check
|
|
+ if (size < SG5_MSG_LEN_CTRL) {
|
|
+ return 0; // need more bytes
|
|
+ }
|
|
+
|
|
+ // validate TERM
|
|
+ if (!surfacegen5_ssh_is_valid_ter(buf + SG5_FRAME_OFFS_TERM)) {
|
|
+ dev_err(dev, SG5_RECV_TAG "invalid end of message\n");
|
|
+ return size; // discard everything
|
|
+ }
|
|
+
|
|
+ // validate CRC
|
|
+ if (!surfacegen5_ssh_is_valid_crc(ctrl_begin, ctrl_end)) {
|
|
+ dev_err(dev, SG5_RECV_TAG "invalid checksum (ctrl)\n");
|
|
+ return SG5_MSG_LEN_CTRL; // only discard message
|
|
+ }
|
|
+
|
|
+ // check if we expect the message
|
|
+ if (rcv->state != SG5_RCV_CONTROL) {
|
|
+ dev_err(dev, SG5_RECV_TAG "discarding message: ctrl not expected\n");
|
|
+ return SG5_MSG_LEN_CTRL; // discard message
|
|
+ }
|
|
+
|
|
+ // check if it is for our request
|
|
+ if (ctrl->type == SG5_FRAME_TYPE_ACK && ctrl->seq != rcv->expect.seq) {
|
|
+ dev_err(dev, SG5_RECV_TAG "discarding message: ack does not match\n");
|
|
+ return SG5_MSG_LEN_CTRL; // discard message
|
|
+ }
|
|
+
|
|
+ // we now have a valid & expected ACK/RETRY message
|
|
+ dev_dbg(dev, SG5_RECV_TAG "valid control message received (type: 0x%02x)\n", ctrl->type);
|
|
+
|
|
+ packet.type = ctrl->type;
|
|
+ packet.seq = ctrl->seq;
|
|
+ packet.len = 0;
|
|
+
|
|
+ if (kfifo_avail(&rcv->fifo) >= sizeof(packet)) {
|
|
+ kfifo_in(&rcv->fifo, (u8 *) &packet, sizeof(packet));
|
|
+
|
|
+ } else {
|
|
+ dev_warn(dev, SG5_RECV_TAG
|
|
+ "dropping frame: not enough space in fifo (type = %d)\n",
|
|
+ SG5_FRAME_TYPE_CMD);
|
|
+
|
|
+ return SG5_MSG_LEN_CTRL; // discard message
|
|
+ }
|
|
+
|
|
+ // update decoder state
|
|
+ if (ctrl->type == SG5_FRAME_TYPE_ACK) {
|
|
+ rcv->state = rcv->expect.pld
|
|
+ ? SG5_RCV_COMMAND
|
|
+ : SG5_RCV_DISCARD;
|
|
+ }
|
|
+
|
|
+ complete(&rcv->signal);
|
|
+ return SG5_MSG_LEN_CTRL; // handled message
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_receive_msg_cmd(struct surfacegen5_ec *ec,
|
|
+ const u8 *buf, size_t size)
|
|
+{
|
|
+ struct device *dev = &ec->serdev->dev;
|
|
+ struct surfacegen5_ec_receiver *rcv = &ec->receiver;
|
|
+ const struct surfacegen5_frame_ctrl *ctrl;
|
|
+ const struct surfacegen5_frame_cmd *cmd;
|
|
+ struct surfacegen5_fifo_packet packet;
|
|
+
|
|
+ const u8 *ctrl_begin = buf + SG5_FRAME_OFFS_CTRL;
|
|
+ const u8 *ctrl_end = buf + SG5_FRAME_OFFS_CTRL_CRC;
|
|
+ const u8 *cmd_begin = buf + SG5_FRAME_OFFS_CMD;
|
|
+ const u8 *cmd_begin_pld = buf + SG5_FRAME_OFFS_CMD_PLD;
|
|
+ const u8 *cmd_end;
|
|
+
|
|
+ size_t msg_len;
|
|
+
|
|
+ ctrl = (const struct surfacegen5_frame_ctrl *)(ctrl_begin);
|
|
+ cmd = (const struct surfacegen5_frame_cmd *)(cmd_begin);
|
|
+
|
|
+ // we need at least a full control frame
|
|
+ if (size < (SG5_BYTELEN_SYNC + SG5_BYTELEN_CTRL + SG5_BYTELEN_CRC)) {
|
|
+ return 0; // need more bytes
|
|
+ }
|
|
+
|
|
+ // validate control-frame CRC
|
|
+ if (!surfacegen5_ssh_is_valid_crc(ctrl_begin, ctrl_end)) {
|
|
+ dev_err(dev, SG5_RECV_TAG "invalid checksum (cmd-ctrl)\n");
|
|
+ /*
|
|
+ * We can't be sure here if length is valid, thus
|
|
+ * discard everything.
|
|
+ */
|
|
+ return size;
|
|
+ }
|
|
+
|
|
+ // actual length check (ctrl->len contains command-frame but not crc)
|
|
+ msg_len = SG5_MSG_LEN_CMD_BASE + ctrl->len;
|
|
+ if (size < msg_len) {
|
|
+ return 0; // need more bytes
|
|
+ }
|
|
+
|
|
+ cmd_end = cmd_begin + ctrl->len;
|
|
+
|
|
+ // validate command-frame type
|
|
+ if (cmd->type != SG5_FRAME_TYPE_CMD) {
|
|
+ dev_err(dev, SG5_RECV_TAG "expected command frame type but got 0x%02x\n", cmd->type);
|
|
+ return size; // discard everything
|
|
+ }
|
|
+
|
|
+ // validate command-frame CRC
|
|
+ if (!surfacegen5_ssh_is_valid_crc(cmd_begin, cmd_end)) {
|
|
+ dev_err(dev, SG5_RECV_TAG "invalid checksum (cmd-pld)\n");
|
|
+
|
|
+ /*
|
|
+ * The message length is provided in the control frame. As we
|
|
+ * already validated that, we can be sure here that it's
|
|
+ * correct, so we only need to discard the message.
|
|
+ */
|
|
+ return msg_len;
|
|
+ }
|
|
+
|
|
+ // check if we received an event notification
|
|
+ if (surfacegen5_rqid_is_event((cmd->rqid_hi << 8) | cmd->rqid_lo)) {
|
|
+ surfacegen5_ssh_handle_event(ec, buf);
|
|
+ return msg_len; // handled message
|
|
+ }
|
|
+
|
|
+ // check if we expect the message
|
|
+ if (rcv->state != SG5_RCV_COMMAND) {
|
|
+ dev_dbg(dev, SG5_RECV_TAG "discarding message: command not expected\n");
|
|
+ return msg_len; // discard message
|
|
+ }
|
|
+
|
|
+ // check if response is for our request
|
|
+ if (rcv->expect.rqid != (cmd->rqid_lo | (cmd->rqid_hi << 8))) {
|
|
+ dev_dbg(dev, SG5_RECV_TAG "discarding message: command not a match\n");
|
|
+ return msg_len; // discard message
|
|
+ }
|
|
+
|
|
+ // we now have a valid & expected command message
|
|
+ dev_dbg(dev, SG5_RECV_TAG "valid command message received\n");
|
|
+
|
|
+ packet.type = ctrl->type;
|
|
+ packet.seq = ctrl->seq;
|
|
+ packet.len = cmd_end - cmd_begin_pld;
|
|
+
|
|
+ if (kfifo_avail(&rcv->fifo) >= sizeof(packet) + packet.len) {
|
|
+ kfifo_in(&rcv->fifo, &packet, sizeof(packet));
|
|
+ kfifo_in(&rcv->fifo, cmd_begin_pld, packet.len);
|
|
+
|
|
+ } else {
|
|
+ dev_warn(dev, SG5_RECV_TAG
|
|
+ "dropping frame: not enough space in fifo (type = %d)\n",
|
|
+ SG5_FRAME_TYPE_CMD);
|
|
+
|
|
+ return SG5_MSG_LEN_CTRL; // discard message
|
|
+ }
|
|
+
|
|
+ rcv->state = SG5_RCV_DISCARD;
|
|
+
|
|
+ complete(&rcv->signal);
|
|
+ return msg_len; // handled message
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_eval_buf(struct surfacegen5_ec *ec,
|
|
+ const u8 *buf, size_t size)
|
|
+{
|
|
+ struct device *dev = &ec->serdev->dev;
|
|
+ struct surfacegen5_frame_ctrl *ctrl;
|
|
+
|
|
+ // we need at least a control frame to check what to do
|
|
+ if (size < (SG5_BYTELEN_SYNC + SG5_BYTELEN_CTRL)) {
|
|
+ return 0; // need more bytes
|
|
+ }
|
|
+
|
|
+ // make sure we're actually at the start of a new message
|
|
+ if (!surfacegen5_ssh_is_valid_syn(buf)) {
|
|
+ dev_err(dev, SG5_RECV_TAG "invalid start of message\n");
|
|
+ return size; // discard everything
|
|
+ }
|
|
+
|
|
+ // handle individual message types seperately
|
|
+ ctrl = (struct surfacegen5_frame_ctrl *)(buf + SG5_FRAME_OFFS_CTRL);
|
|
+
|
|
+ switch (ctrl->type) {
|
|
+ case SG5_FRAME_TYPE_ACK:
|
|
+ case SG5_FRAME_TYPE_RETRY:
|
|
+ return surfacegen5_ssh_receive_msg_ctrl(ec, buf, size);
|
|
+
|
|
+ case SG5_FRAME_TYPE_CMD:
|
|
+ return surfacegen5_ssh_receive_msg_cmd(ec, buf, size);
|
|
+
|
|
+ default:
|
|
+ dev_err(dev, SG5_RECV_TAG "unknown frame type 0x%02x\n", ctrl->type);
|
|
+ return size; // discard everything
|
|
+ }
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_receive_buf(struct serdev_device *serdev,
|
|
+ const unsigned char *buf, size_t size)
|
|
+{
|
|
+ struct surfacegen5_ec *ec = serdev_device_get_drvdata(serdev);
|
|
+ struct surfacegen5_ec_receiver *rcv = &ec->receiver;
|
|
+ unsigned long flags;
|
|
+ int offs = 0;
|
|
+ int used, n;
|
|
+
|
|
+ dev_dbg(&serdev->dev, SG5_RECV_TAG "received buffer (size: %zu)\n", size);
|
|
+ print_hex_dump_debug(SG5_RECV_TAG, DUMP_PREFIX_OFFSET, 16, 1, buf, size, false);
|
|
+
|
|
+ /*
|
|
+ * The battery _BIX message gets a bit long, thus we have to add some
|
|
+ * additional buffering here.
|
|
+ */
|
|
+
|
|
+ spin_lock_irqsave(&rcv->lock, flags);
|
|
+
|
|
+ // copy to eval-buffer
|
|
+ used = min(size, (size_t)(rcv->eval_buf.cap - rcv->eval_buf.len));
|
|
+ memcpy(rcv->eval_buf.ptr + rcv->eval_buf.len, buf, used);
|
|
+ rcv->eval_buf.len += used;
|
|
+
|
|
+ // evaluate buffer until we need more bytes or eval-buf is empty
|
|
+ while (offs < rcv->eval_buf.len) {
|
|
+ n = rcv->eval_buf.len - offs;
|
|
+ n = surfacegen5_ssh_eval_buf(ec, rcv->eval_buf.ptr + offs, n);
|
|
+ if (n <= 0) break; // need more bytes
|
|
+
|
|
+ offs += n;
|
|
+ }
|
|
+
|
|
+ // throw away the evaluated parts
|
|
+ rcv->eval_buf.len -= offs;
|
|
+ memmove(rcv->eval_buf.ptr, rcv->eval_buf.ptr + offs, rcv->eval_buf.len);
|
|
+
|
|
+ spin_unlock_irqrestore(&rcv->lock, flags);
|
|
+
|
|
+ return used;
|
|
+}
|
|
+
|
|
+
|
|
+static acpi_status
|
|
+surfacegen5_ssh_setup_from_resource(struct acpi_resource *resource, void *context)
|
|
+{
|
|
+ struct serdev_device *serdev = context;
|
|
+ struct acpi_resource_common_serialbus *serial;
|
|
+ struct acpi_resource_uart_serialbus *uart;
|
|
+ int status = 0;
|
|
+
|
|
+ if (resource->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ serial = &resource->data.common_serial_bus;
|
|
+ if (serial->type != ACPI_RESOURCE_SERIAL_TYPE_UART) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ uart = &resource->data.uart_serial_bus;
|
|
+
|
|
+ // set up serdev device
|
|
+ serdev_device_set_baudrate(serdev, uart->default_baud_rate);
|
|
+
|
|
+ // serdev currently only supports RTSCTS flow control
|
|
+ if (uart->flow_control & SG5_SUPPORTED_FLOW_CONTROL_MASK) {
|
|
+ dev_warn(&serdev->dev, "unsupported flow control (value: 0x%02x)\n", uart->flow_control);
|
|
+ }
|
|
+
|
|
+ // set RTSCTS flow control
|
|
+ serdev_device_set_flow_control(serdev, uart->flow_control & ACPI_UART_FLOW_CONTROL_HW);
|
|
+
|
|
+ // serdev currently only supports EVEN/ODD parity
|
|
+ switch (uart->parity) {
|
|
+ case ACPI_UART_PARITY_NONE:
|
|
+ status = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE);
|
|
+ break;
|
|
+ case ACPI_UART_PARITY_EVEN:
|
|
+ status = serdev_device_set_parity(serdev, SERDEV_PARITY_EVEN);
|
|
+ break;
|
|
+ case ACPI_UART_PARITY_ODD:
|
|
+ status = serdev_device_set_parity(serdev, SERDEV_PARITY_ODD);
|
|
+ break;
|
|
+ default:
|
|
+ dev_warn(&serdev->dev, "unsupported parity (value: 0x%02x)\n", uart->parity);
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ if (status) {
|
|
+ dev_err(&serdev->dev, "failed to set parity (value: 0x%02x)\n", uart->parity);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ return AE_CTRL_TERMINATE; // we've found the resource and are done
|
|
+}
|
|
+
|
|
+
|
|
+static bool surfacegen5_idma_filter(struct dma_chan *chan, void *param)
|
|
+{
|
|
+ // see dw8250_idma_filter
|
|
+ return param == chan->device->dev->parent;
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_check_dma(struct serdev_device *serdev)
|
|
+{
|
|
+ struct device *dev = serdev->ctrl->dev.parent;
|
|
+ struct dma_chan *rx, *tx;
|
|
+ dma_cap_mask_t mask;
|
|
+ int status = 0;
|
|
+
|
|
+ /*
|
|
+ * The EC UART requires DMA for proper communication. If we don't use DMA,
|
|
+ * we'll drop bytes when the system has high load, e.g. during boot. This
|
|
+ * causes some ugly behaviour, i.e. battery information (_BIX) messages
|
|
+ * failing frequently. We're making sure the required DMA channels are
|
|
+ * available here so serial8250_do_startup is able to grab them later
|
|
+ * instead of silently falling back to a non-DMA approach.
|
|
+ */
|
|
+
|
|
+ dma_cap_zero(mask);
|
|
+ dma_cap_set(DMA_SLAVE, mask);
|
|
+
|
|
+ rx = dma_request_slave_channel_compat(mask, surfacegen5_idma_filter, dev->parent, dev, "rx");
|
|
+ if (IS_ERR_OR_NULL(rx)) {
|
|
+ status = rx ? PTR_ERR(rx) : -EPROBE_DEFER;
|
|
+ if (status != -EPROBE_DEFER) {
|
|
+ dev_err(&serdev->dev, "sg5_dma: error requesting rx channel: %d\n", status);
|
|
+ } else {
|
|
+ dev_dbg(&serdev->dev, "sg5_dma: rx channel not found, deferring probe\n");
|
|
+ }
|
|
+ goto check_dma_out;
|
|
+ }
|
|
+
|
|
+ tx = dma_request_slave_channel_compat(mask, surfacegen5_idma_filter, dev->parent, dev, "tx");
|
|
+ if (IS_ERR_OR_NULL(tx)) {
|
|
+ status = tx ? PTR_ERR(tx) : -EPROBE_DEFER;
|
|
+ if (status != -EPROBE_DEFER) {
|
|
+ dev_err(&serdev->dev, "sg5_dma: error requesting tx channel: %d\n", status);
|
|
+ } else {
|
|
+ dev_dbg(&serdev->dev, "sg5_dma: tx channel not found, deferring probe\n");
|
|
+ }
|
|
+ goto check_dma_release_rx;
|
|
+ }
|
|
+
|
|
+ dma_release_channel(tx);
|
|
+check_dma_release_rx:
|
|
+ dma_release_channel(rx);
|
|
+check_dma_out:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+
|
|
+static int surfacegen5_ssh_suspend(struct device *dev)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ int status = 0;
|
|
+
|
|
+ dev_dbg(dev, "suspending\n");
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (ec) {
|
|
+ status = surfacegen5_ssh_ec_suspend(ec);
|
|
+ if (status) {
|
|
+ dev_err(dev, "failed to suspend EC: %d\n", status);
|
|
+ }
|
|
+
|
|
+ ec->state = SG5_EC_SUSPENDED;
|
|
+ surfacegen5_ec_release(ec);
|
|
+ }
|
|
+
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int surfacegen5_ssh_resume(struct device *dev)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ int status = 0;
|
|
+
|
|
+ dev_dbg(dev, "resuming\n");
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (ec) {
|
|
+ ec->state = SG5_EC_INITIALIZED;
|
|
+
|
|
+ status = surfacegen5_ssh_ec_resume(ec);
|
|
+ if (status) {
|
|
+ dev_err(dev, "failed to resume EC: %d\n", status);
|
|
+ }
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+ }
|
|
+
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static SIMPLE_DEV_PM_OPS(surfacegen5_ssh_pm_ops, surfacegen5_ssh_suspend, surfacegen5_ssh_resume);
|
|
+
|
|
+
|
|
+static const struct serdev_device_ops surfacegen5_ssh_device_ops = {
|
|
+ .receive_buf = surfacegen5_ssh_receive_buf,
|
|
+ .write_wakeup = serdev_device_write_wakeup,
|
|
+};
|
|
+
|
|
+static int surfacegen5_acpi_ssh_probe(struct serdev_device *serdev)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ struct workqueue_struct *event_queue_ack;
|
|
+ struct workqueue_struct *event_queue_evt;
|
|
+ u8 *write_buf;
|
|
+ u8 *read_buf;
|
|
+ u8 *eval_buf;
|
|
+ acpi_handle *ssh = ACPI_HANDLE(&serdev->dev);
|
|
+ acpi_status status;
|
|
+
|
|
+ dev_dbg(&serdev->dev, "probing\n");
|
|
+
|
|
+ // ensure DMA is ready before we set up the device
|
|
+ status = surfacegen5_ssh_check_dma(serdev);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ // allocate buffers
|
|
+ write_buf = kzalloc(SG5_WRITE_BUF_LEN, GFP_KERNEL);
|
|
+ if (!write_buf) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_probe_write_buf;
|
|
+ }
|
|
+
|
|
+ read_buf = kzalloc(SG5_READ_BUF_LEN, GFP_KERNEL);
|
|
+ if (!read_buf) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_probe_read_buf;
|
|
+ }
|
|
+
|
|
+ eval_buf = kzalloc(SG5_EVAL_BUF_LEN, GFP_KERNEL);
|
|
+ if (!eval_buf) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_probe_eval_buf;
|
|
+ }
|
|
+
|
|
+ event_queue_ack = create_singlethread_workqueue("sg5_ackq");
|
|
+ if (!event_queue_ack) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_probe_ackq;
|
|
+ }
|
|
+
|
|
+ event_queue_evt = create_workqueue("sg5_evtq");
|
|
+ if (!event_queue_evt) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_probe_evtq;
|
|
+ }
|
|
+
|
|
+ // set up EC
|
|
+ ec = surfacegen5_ec_acquire();
|
|
+ if (ec->state != SG5_EC_UNINITIALIZED) {
|
|
+ dev_err(&serdev->dev, "embedded controller already initialized\n");
|
|
+ surfacegen5_ec_release(ec);
|
|
+
|
|
+ status = -EBUSY;
|
|
+ goto err_probe_busy;
|
|
+ }
|
|
+
|
|
+ ec->serdev = serdev;
|
|
+ ec->writer.data = write_buf;
|
|
+ ec->writer.ptr = write_buf;
|
|
+
|
|
+ // initialize receiver
|
|
+ init_completion(&ec->receiver.signal);
|
|
+ kfifo_init(&ec->receiver.fifo, read_buf, SG5_READ_BUF_LEN);
|
|
+ ec->receiver.eval_buf.ptr = eval_buf;
|
|
+ ec->receiver.eval_buf.cap = SG5_EVAL_BUF_LEN;
|
|
+ ec->receiver.eval_buf.len = 0;
|
|
+
|
|
+ // initialize event handling
|
|
+ ec->events.queue_ack = event_queue_ack;
|
|
+ ec->events.queue_evt = event_queue_evt;
|
|
+
|
|
+ ec->state = SG5_EC_INITIALIZED;
|
|
+
|
|
+ serdev_device_set_drvdata(serdev, ec);
|
|
+
|
|
+ // ensure everything is properly set-up before we open the device
|
|
+ smp_mb();
|
|
+
|
|
+ serdev_device_set_client_ops(serdev, &surfacegen5_ssh_device_ops);
|
|
+ status = serdev_device_open(serdev);
|
|
+ if (status) {
|
|
+ goto err_probe_open;
|
|
+ }
|
|
+
|
|
+ status = acpi_walk_resources(ssh, METHOD_NAME__CRS,
|
|
+ surfacegen5_ssh_setup_from_resource, serdev);
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ goto err_probe_devinit;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ssh_ec_resume(ec);
|
|
+ if (status) {
|
|
+ goto err_probe_devinit;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ssh_sysfs_register(&serdev->dev);
|
|
+ if (status) {
|
|
+ goto err_probe_devinit;
|
|
+ }
|
|
+
|
|
+ surfacegen5_ec_release(ec);
|
|
+
|
|
+ acpi_walk_dep_device_list(ssh);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_probe_devinit:
|
|
+ serdev_device_close(serdev);
|
|
+err_probe_open:
|
|
+ ec->state = SG5_EC_UNINITIALIZED;
|
|
+ serdev_device_set_drvdata(serdev, NULL);
|
|
+ surfacegen5_ec_release(ec);
|
|
+err_probe_busy:
|
|
+ destroy_workqueue(event_queue_evt);
|
|
+err_probe_evtq:
|
|
+ destroy_workqueue(event_queue_ack);
|
|
+err_probe_ackq:
|
|
+ kfree(eval_buf);
|
|
+err_probe_eval_buf:
|
|
+ kfree(read_buf);
|
|
+err_probe_read_buf:
|
|
+ kfree(write_buf);
|
|
+err_probe_write_buf:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static void surfacegen5_acpi_ssh_remove(struct serdev_device *serdev)
|
|
+{
|
|
+ struct surfacegen5_ec *ec;
|
|
+ unsigned long flags;
|
|
+ int status;
|
|
+
|
|
+ ec = surfacegen5_ec_acquire_init();
|
|
+ if (!ec) {
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ surfacegen5_ssh_sysfs_unregister(&serdev->dev);
|
|
+
|
|
+ // suspend EC and disable events
|
|
+ status = surfacegen5_ssh_ec_suspend(ec);
|
|
+ if (status) {
|
|
+ dev_err(&serdev->dev, "failed to suspend EC: %d\n", status);
|
|
+ }
|
|
+
|
|
+ // make sure all events (received up to now) have been properly handled
|
|
+ flush_workqueue(ec->events.queue_ack);
|
|
+ flush_workqueue(ec->events.queue_evt);
|
|
+
|
|
+ // remove event handlers
|
|
+ spin_lock_irqsave(&ec->events.lock, flags);
|
|
+ memset(ec->events.handler, 0,
|
|
+ sizeof(struct surfacegen5_ec_event_handler)
|
|
+ * SG5_NUM_EVENT_TYPES);
|
|
+ spin_unlock_irqrestore(&ec->events.lock, flags);
|
|
+
|
|
+ // set device to deinitialized state
|
|
+ ec->state = SG5_EC_UNINITIALIZED;
|
|
+ ec->serdev = NULL;
|
|
+
|
|
+ // ensure state and serdev get set before continuing
|
|
+ smp_mb();
|
|
+
|
|
+ /*
|
|
+ * Flush any event that has not been processed yet to ensure we're not going to
|
|
+ * use the serial device any more (e.g. for ACKing).
|
|
+ */
|
|
+ flush_workqueue(ec->events.queue_ack);
|
|
+ flush_workqueue(ec->events.queue_evt);
|
|
+
|
|
+ serdev_device_close(serdev);
|
|
+
|
|
+ /*
|
|
+ * Only at this point, no new events can be received. Destroying the
|
|
+ * workqueue here flushes all remaining events. Those events will be
|
|
+ * silently ignored and neither ACKed nor any handler gets called.
|
|
+ */
|
|
+ destroy_workqueue(ec->events.queue_ack);
|
|
+ destroy_workqueue(ec->events.queue_evt);
|
|
+
|
|
+ // free writer
|
|
+ kfree(ec->writer.data);
|
|
+ ec->writer.data = NULL;
|
|
+ ec->writer.ptr = NULL;
|
|
+
|
|
+ // free receiver
|
|
+ spin_lock_irqsave(&ec->receiver.lock, flags);
|
|
+ ec->receiver.state = SG5_RCV_DISCARD;
|
|
+ kfifo_free(&ec->receiver.fifo);
|
|
+
|
|
+ kfree(ec->receiver.eval_buf.ptr);
|
|
+ ec->receiver.eval_buf.ptr = NULL;
|
|
+ ec->receiver.eval_buf.cap = 0;
|
|
+ ec->receiver.eval_buf.len = 0;
|
|
+ spin_unlock_irqrestore(&ec->receiver.lock, flags);
|
|
+
|
|
+ serdev_device_set_drvdata(serdev, NULL);
|
|
+ surfacegen5_ec_release(ec);
|
|
+}
|
|
+
|
|
+
|
|
+static const struct acpi_device_id surfacegen5_acpi_ssh_match[] = {
|
|
+ { "MSHW0084", 0 },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, surfacegen5_acpi_ssh_match);
|
|
+
|
|
+struct serdev_device_driver surfacegen5_acpi_ssh = {
|
|
+ .probe = surfacegen5_acpi_ssh_probe,
|
|
+ .remove = surfacegen5_acpi_ssh_remove,
|
|
+ .driver = {
|
|
+ .name = "surfacegen5_acpi_ssh",
|
|
+ .acpi_match_table = ACPI_PTR(surfacegen5_acpi_ssh_match),
|
|
+ .pm = &surfacegen5_ssh_pm_ops,
|
|
+ },
|
|
+};
|
|
+
|
|
+inline int surfacegen5_acpi_ssh_register(void)
|
|
+{
|
|
+ return serdev_device_driver_register(&surfacegen5_acpi_ssh);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_ssh_unregister(void)
|
|
+{
|
|
+ serdev_device_driver_unregister(&surfacegen5_acpi_ssh);
|
|
+}
|
|
+
|
|
+#else /* CONFIG_SURFACE_ACPI_SSH */
|
|
+
|
|
+inline int surfacegen5_acpi_ssh_register(void)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_ssh_unregister(void)
|
|
+{
|
|
+}
|
|
+
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_SSH */
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Surface Serial Hub Debug Device (private implementation)
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SURFACE_ACPI_SSH_DEBUG_DEVICE
|
|
+
|
|
+static char sg5_ssh_debug_rqst_buf_sysfs[SURFACEGEN5_MAX_RQST_RESPONSE + 1] = { 0 };
|
|
+static char sg5_ssh_debug_rqst_buf_pld[SURFACEGEN5_MAX_RQST_PAYLOAD] = { 0 };
|
|
+static char sg5_ssh_debug_rqst_buf_res[SURFACEGEN5_MAX_RQST_RESPONSE] = { 0 };
|
|
+
|
|
+static ssize_t rqst_read(struct file *f, struct kobject *kobj, struct bin_attribute *attr,
|
|
+ char *buf, loff_t offs, size_t count)
|
|
+{
|
|
+ if (offs < 0 || count + offs > SURFACEGEN5_MAX_RQST_RESPONSE) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ memcpy(buf, sg5_ssh_debug_rqst_buf_sysfs + offs, count);
|
|
+ return count;
|
|
+}
|
|
+
|
|
+static ssize_t rqst_write(struct file *f, struct kobject *kobj, struct bin_attribute *attr,
|
|
+ char *buf, loff_t offs, size_t count)
|
|
+{
|
|
+ struct surfacegen5_rqst rqst = {};
|
|
+ struct surfacegen5_buf result = {};
|
|
+ int status;
|
|
+
|
|
+ // check basic write constriants
|
|
+ if (offs != 0 || count > SURFACEGEN5_MAX_RQST_PAYLOAD + 5) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ // payload length should be consistent with data provided
|
|
+ if (buf[4] + 5 != count) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ rqst.tc = buf[0];
|
|
+ rqst.iid = buf[1];
|
|
+ rqst.cid = buf[2];
|
|
+ rqst.snc = buf[3];
|
|
+ rqst.cdl = buf[4];
|
|
+ rqst.pld = sg5_ssh_debug_rqst_buf_pld;
|
|
+ memcpy(sg5_ssh_debug_rqst_buf_pld, buf + 5, count - 5);
|
|
+
|
|
+ result.cap = SURFACEGEN5_MAX_RQST_RESPONSE;
|
|
+ result.len = 0;
|
|
+ result.data = sg5_ssh_debug_rqst_buf_res;
|
|
+
|
|
+ status = surfacegen5_ec_rqst(&rqst, &result);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ sg5_ssh_debug_rqst_buf_sysfs[0] = result.len;
|
|
+ memcpy(sg5_ssh_debug_rqst_buf_sysfs + 1, result.data, result.len);
|
|
+ memset(sg5_ssh_debug_rqst_buf_sysfs + result.len + 1, 0,
|
|
+ SURFACEGEN5_MAX_RQST_RESPONSE + 1 - result.len);
|
|
+
|
|
+ return count;
|
|
+}
|
|
+
|
|
+static const BIN_ATTR_RW(rqst, SURFACEGEN5_MAX_RQST_RESPONSE + 1);
|
|
+
|
|
+
|
|
+inline int surfacegen5_ssh_sysfs_register(struct device *dev)
|
|
+{
|
|
+ return sysfs_create_bin_file(&dev->kobj, &bin_attr_rqst);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_ssh_sysfs_unregister(struct device *dev)
|
|
+{
|
|
+ sysfs_remove_bin_file(&dev->kobj, &bin_attr_rqst);
|
|
+}
|
|
+
|
|
+#elif defined(CONFIG_SURFACE_ACPI_SSH)
|
|
+
|
|
+inline int surfacegen5_ssh_sysfs_register(struct device *dev)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_ssh_sysfs_unregister(struct device *dev)
|
|
+{
|
|
+}
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_SSH_DEBUG_DEVICE*/
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Surface ACPI Notify driver
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SURFACE_ACPI_SAN
|
|
+
|
|
+#define SG5_SAN_RQST_RETRY 5
|
|
+
|
|
+#define SG5_SAN_DSM_REVISION 0
|
|
+#define SG5_SAN_DSM_FN_NOTIFY_SENSOR_TRIP_POINT 0x09
|
|
+
|
|
+static const guid_t SG5_SAN_DSM_UUID =
|
|
+ GUID_INIT(0x93b666c5, 0x70c6, 0x469f, 0xa2, 0x15, 0x3d,
|
|
+ 0x48, 0x7c, 0x91, 0xab, 0x3c);
|
|
+
|
|
+#define SG5_EVENT_DELAY_POWER msecs_to_jiffies(5000)
|
|
+
|
|
+#define SG5_EVENT_PWR_TC 0x02
|
|
+#define SG5_EVENT_PWR_RQID 0x0002
|
|
+#define SG5_EVENT_PWR_CID_HWCHANGE 0x15
|
|
+#define SG5_EVENT_PWR_CID_CHARGING 0x16
|
|
+#define SG5_EVENT_PWR_CID_ADAPTER 0x17
|
|
+#define SG5_EVENT_PWR_CID_STATE 0x4f
|
|
+
|
|
+#define SG5_EVENT_TEMP_TC 0x03
|
|
+#define SG5_EVENT_TEMP_RQID 0x0003
|
|
+#define SG5_EVENT_TEMP_CID_NOTIFY_SENSOR_TRIP_POINT 0x0b
|
|
+
|
|
+#define SG5_SAN_RQST_TAG "surfacegen5_ec_rqst: "
|
|
+
|
|
+#define SG5_QUIRK_BASE_STATE_DELAY 1000
|
|
+
|
|
+
|
|
+struct surfacegen5_san_acpi_consumer {
|
|
+ char *path;
|
|
+ bool required;
|
|
+ u32 flags;
|
|
+};
|
|
+
|
|
+struct surfacegen5_san_opreg_context {
|
|
+ struct acpi_connection_info connection;
|
|
+ struct device *dev;
|
|
+};
|
|
+
|
|
+struct surfacegen5_san_consumers {
|
|
+ u32 num;
|
|
+ struct device_link **links;
|
|
+};
|
|
+
|
|
+struct surfacegen5_san_drvdata {
|
|
+ struct surfacegen5_san_opreg_context opreg_ctx;
|
|
+ struct surfacegen5_san_consumers consumers;
|
|
+ struct device_link *ec_link;
|
|
+};
|
|
+
|
|
+struct gsb_data_in {
|
|
+ u8 cv;
|
|
+} __packed;
|
|
+
|
|
+struct gsb_data_rqsx {
|
|
+ u8 cv; // command value (should be 0x01 or 0x03)
|
|
+ u8 tc; // target controller
|
|
+ u8 tid; // expected to be 0x01, could be revision
|
|
+ u8 iid; // target sub-controller (e.g. primary vs. secondary battery)
|
|
+ u8 snc; // expect-response-flag
|
|
+ u8 cid; // command ID
|
|
+ u8 cdl; // payload length
|
|
+ u8 _pad; // padding
|
|
+ u8 pld[0]; // payload
|
|
+} __packed;
|
|
+
|
|
+struct gsb_data_etwl {
|
|
+ u8 cv; // command value (should be 0x02)
|
|
+ u8 etw3; // ?
|
|
+ u8 etw4; // ?
|
|
+ u8 msg[0]; // error message (ASCIIZ)
|
|
+} __packed;
|
|
+
|
|
+struct gsb_data_out {
|
|
+ u8 status; // _SSH communication status
|
|
+ u8 len; // _SSH payload length
|
|
+ u8 pld[0]; // _SSH payload
|
|
+} __packed;
|
|
+
|
|
+union gsb_buffer_data {
|
|
+ struct gsb_data_in in; // common input
|
|
+ struct gsb_data_rqsx rqsx; // RQSX input
|
|
+ struct gsb_data_etwl etwl; // ETWL input
|
|
+ struct gsb_data_out out; // output
|
|
+};
|
|
+
|
|
+struct gsb_buffer {
|
|
+ u8 status; // GSB AttribRawProcess status
|
|
+ u8 len; // GSB AttribRawProcess length
|
|
+ union gsb_buffer_data data;
|
|
+} __packed;
|
|
+
|
|
+
|
|
+enum surfacegen5_pwr_event {
|
|
+ SURFACEGEN5_PWR_EVENT_BAT1_STAT = 0x03,
|
|
+ SURFACEGEN5_PWR_EVENT_BAT1_INFO = 0x04,
|
|
+ SURFACEGEN5_PWR_EVENT_ADP1_STAT = 0x05,
|
|
+ SURFACEGEN5_PWR_EVENT_ADP1_INFO = 0x06,
|
|
+ SURFACEGEN5_PWR_EVENT_BAT2_STAT = 0x07,
|
|
+ SURFACEGEN5_PWR_EVENT_BAT2_INFO = 0x08,
|
|
+};
|
|
+
|
|
+
|
|
+static int surfacegen5_acpi_notify_power_event(struct device *dev, enum surfacegen5_pwr_event event)
|
|
+{
|
|
+ acpi_handle san = ACPI_HANDLE(dev);
|
|
+ union acpi_object *obj;
|
|
+
|
|
+ obj = acpi_evaluate_dsm_typed(san, &SG5_SAN_DSM_UUID, SG5_SAN_DSM_REVISION,
|
|
+ (u8) event, NULL, ACPI_TYPE_BUFFER);
|
|
+
|
|
+ if (IS_ERR_OR_NULL(obj)) {
|
|
+ return obj ? PTR_ERR(obj) : -ENXIO;
|
|
+ }
|
|
+
|
|
+ if (obj->buffer.length != 1 || obj->buffer.pointer[0] != 0) {
|
|
+ dev_err(dev, "got unexpected result from _DSM\n");
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ ACPI_FREE(obj);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_notify_sensor_trip_point(struct device *dev, u8 iid)
|
|
+{
|
|
+ acpi_handle san = ACPI_HANDLE(dev);
|
|
+ union acpi_object *obj;
|
|
+ union acpi_object param;
|
|
+
|
|
+ param.type = ACPI_TYPE_INTEGER;
|
|
+ param.integer.value = iid;
|
|
+
|
|
+ obj = acpi_evaluate_dsm_typed(san, &SG5_SAN_DSM_UUID, SG5_SAN_DSM_REVISION,
|
|
+ SG5_SAN_DSM_FN_NOTIFY_SENSOR_TRIP_POINT,
|
|
+ ¶m, ACPI_TYPE_BUFFER);
|
|
+
|
|
+ if (IS_ERR_OR_NULL(obj)) {
|
|
+ return obj ? PTR_ERR(obj) : -ENXIO;
|
|
+ }
|
|
+
|
|
+ if (obj->buffer.length != 1 || obj->buffer.pointer[0] != 0) {
|
|
+ dev_err(dev, "got unexpected result from _DSM\n");
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ ACPI_FREE(obj);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+inline static int surfacegen5_evt_power_adapter(struct device *dev, struct surfacegen5_event *event)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_acpi_notify_power_event(dev, SURFACEGEN5_PWR_EVENT_ADP1_STAT);
|
|
+ if (status) {
|
|
+ dev_err(dev, "error handling power event (cid = %x)\n", event->cid);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline static int surfacegen5_evt_power_hwchange(struct device *dev, struct surfacegen5_event *event)
|
|
+{
|
|
+ enum surfacegen5_pwr_event evcode;
|
|
+ int status;
|
|
+
|
|
+ if (event->iid == 0x02) {
|
|
+ evcode = SURFACEGEN5_PWR_EVENT_BAT2_INFO;
|
|
+ } else {
|
|
+ evcode = SURFACEGEN5_PWR_EVENT_BAT1_INFO;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_notify_power_event(dev, evcode);
|
|
+ if (status) {
|
|
+ dev_err(dev, "error handling power event (cid = %x)\n", event->cid);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline static int surfacegen5_evt_power_state(struct device *dev, struct surfacegen5_event *event)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_acpi_notify_power_event(dev, SURFACEGEN5_PWR_EVENT_BAT1_STAT);
|
|
+ if (status) {
|
|
+ dev_err(dev, "error handling power event (cid = %x)\n", event->cid);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_notify_power_event(dev, SURFACEGEN5_PWR_EVENT_BAT2_STAT);
|
|
+ if (status) {
|
|
+ dev_err(dev, "error handling power event (cid = %x)\n", event->cid);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static unsigned long surfacegen5_evt_power_delay(struct surfacegen5_event *event, void *data)
|
|
+{
|
|
+ switch (event->cid) {
|
|
+ case SG5_EVENT_PWR_CID_CHARGING:
|
|
+ case SG5_EVENT_PWR_CID_STATE:
|
|
+ return SG5_EVENT_DELAY_POWER;
|
|
+
|
|
+ case SG5_EVENT_PWR_CID_ADAPTER:
|
|
+ case SG5_EVENT_PWR_CID_HWCHANGE:
|
|
+ default:
|
|
+ return 0;
|
|
+ }
|
|
+}
|
|
+
|
|
+static int surfacegen5_evt_power(struct surfacegen5_event *event, void *data)
|
|
+{
|
|
+ struct device *dev = (struct device *)data;
|
|
+
|
|
+ switch (event->cid) {
|
|
+ case SG5_EVENT_PWR_CID_HWCHANGE:
|
|
+ return surfacegen5_evt_power_hwchange(dev, event);
|
|
+
|
|
+ case SG5_EVENT_PWR_CID_ADAPTER:
|
|
+ return surfacegen5_evt_power_adapter(dev, event);
|
|
+
|
|
+ case SG5_EVENT_PWR_CID_CHARGING:
|
|
+ case SG5_EVENT_PWR_CID_STATE:
|
|
+ return surfacegen5_evt_power_state(dev, event);
|
|
+
|
|
+ default:
|
|
+ dev_warn(dev, "unhandled power event (cid = %x)\n", event->cid);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+inline static int surfacegen5_evt_thermal_notify(struct device *dev, struct surfacegen5_event *event)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_acpi_notify_sensor_trip_point(dev, event->iid);
|
|
+ if (status) {
|
|
+ dev_err(dev, "error handling thermal event (cid = %x)\n", event->cid);
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surfacegen5_evt_thermal(struct surfacegen5_event *event, void *data)
|
|
+{
|
|
+ struct device *dev = (struct device *)data;
|
|
+
|
|
+ switch (event->cid) {
|
|
+ case SG5_EVENT_TEMP_CID_NOTIFY_SENSOR_TRIP_POINT:
|
|
+ return surfacegen5_evt_thermal_notify(dev, event);
|
|
+
|
|
+ default:
|
|
+ dev_warn(dev, "unhandled thermal event (cid = %x)\n", event->cid);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static struct gsb_data_rqsx *surfacegen5_san_validate_rqsx(
|
|
+ struct device *dev, const char *type, struct gsb_buffer *buffer)
|
|
+{
|
|
+ struct gsb_data_rqsx *rqsx = &buffer->data.rqsx;
|
|
+
|
|
+ if (buffer->len < 8) {
|
|
+ dev_err(dev, "invalid %s package (len = %d)\n",
|
|
+ type, buffer->len);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (rqsx->cdl != buffer->len - 8) {
|
|
+ dev_err(dev, "bogus %s package (len = %d, cdl = %d)\n",
|
|
+ type, buffer->len, rqsx->cdl);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ if (rqsx->tid != 0x01) {
|
|
+ dev_warn(dev, "unsupported %s package (tid = 0x%02x)\n",
|
|
+ type, rqsx->tid);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ return rqsx;
|
|
+}
|
|
+
|
|
+static acpi_status
|
|
+surfacegen5_san_etwl(struct surfacegen5_san_opreg_context *ctx, struct gsb_buffer *buffer)
|
|
+{
|
|
+ struct gsb_data_etwl *etwl = &buffer->data.etwl;
|
|
+
|
|
+ if (buffer->len < 3) {
|
|
+ dev_err(ctx->dev, "invalid ETWL package (len = %d)\n", buffer->len);
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ dev_err(ctx->dev, "ETWL(0x%02x, 0x%02x): %.*s\n",
|
|
+ etwl->etw3, etwl->etw4,
|
|
+ buffer->len - 3, (char *)etwl->msg);
|
|
+
|
|
+ // indicate success
|
|
+ buffer->status = 0x00;
|
|
+ buffer->len = 0x00;
|
|
+
|
|
+ return AE_OK;
|
|
+}
|
|
+
|
|
+static acpi_status
|
|
+surfacegen5_san_rqst(struct surfacegen5_san_opreg_context *ctx, struct gsb_buffer *buffer)
|
|
+{
|
|
+ struct gsb_data_rqsx *gsb_rqst = surfacegen5_san_validate_rqsx(ctx->dev, "RQST", buffer);
|
|
+ struct surfacegen5_rqst rqst = {};
|
|
+ struct surfacegen5_buf result = {};
|
|
+ int status = 0;
|
|
+ int try;
|
|
+
|
|
+ if (!gsb_rqst) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ rqst.tc = gsb_rqst->tc;
|
|
+ rqst.iid = gsb_rqst->iid;
|
|
+ rqst.cid = gsb_rqst->cid;
|
|
+ rqst.snc = gsb_rqst->snc;
|
|
+ rqst.cdl = gsb_rqst->cdl;
|
|
+ rqst.pld = &gsb_rqst->pld[0];
|
|
+
|
|
+ result.cap = SURFACEGEN5_MAX_RQST_RESPONSE;
|
|
+ result.len = 0;
|
|
+ result.data = kzalloc(result.cap, GFP_KERNEL);
|
|
+
|
|
+ if (!result.data) {
|
|
+ return AE_NO_MEMORY;
|
|
+ }
|
|
+
|
|
+ for (try = 0; try < SG5_SAN_RQST_RETRY; try++) {
|
|
+ if (try) {
|
|
+ dev_warn(ctx->dev, SG5_SAN_RQST_TAG "IO error occured, trying again\n");
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_rqst(&rqst, &result);
|
|
+ if (status != -EIO) break;
|
|
+ }
|
|
+
|
|
+ if (rqst.tc == 0x11 && rqst.cid == 0x0D && status == -EPERM) {
|
|
+ /* Base state quirk:
|
|
+ * The base state may be queried from ACPI when the EC is
|
|
+ * still suspended. In this case it will return '-EPERM'.
|
|
+ * Returning 0xff (unknown base status) here will suppress
|
|
+ * error messages and cause an immediate re-query of the
|
|
+ * state. Delay return to avoid spinning.
|
|
+ */
|
|
+
|
|
+ buffer->status = 0x00;
|
|
+ buffer->len = 0x03;
|
|
+ buffer->data.out.status = 0x00;
|
|
+ buffer->data.out.len = 0x01;
|
|
+ buffer->data.out.pld[0] = 0xFF;
|
|
+ msleep(SG5_QUIRK_BASE_STATE_DELAY);
|
|
+
|
|
+ } else if (!status) { // success
|
|
+ buffer->status = 0x00;
|
|
+ buffer->len = result.len + 2;
|
|
+ buffer->data.out.status = 0x00;
|
|
+ buffer->data.out.len = result.len;
|
|
+ memcpy(&buffer->data.out.pld[0], result.data, result.len);
|
|
+
|
|
+ } else { // failure
|
|
+ dev_err(ctx->dev, SG5_SAN_RQST_TAG "failed with error %d\n", status);
|
|
+ buffer->status = 0x00;
|
|
+ buffer->len = 0x02;
|
|
+ buffer->data.out.status = 0x01; // indicate _SSH error
|
|
+ buffer->data.out.len = 0x00;
|
|
+ }
|
|
+
|
|
+ kfree(result.data);
|
|
+
|
|
+ return AE_OK;
|
|
+}
|
|
+
|
|
+static acpi_status
|
|
+surfacegen5_san_rqsg(struct surfacegen5_san_opreg_context *ctx, struct gsb_buffer *buffer)
|
|
+{
|
|
+ struct gsb_data_rqsx *rqsg = surfacegen5_san_validate_rqsx(ctx->dev, "RQSG", buffer);
|
|
+
|
|
+ if (!rqsg) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ // TODO: RQSG handler
|
|
+
|
|
+ dev_warn(ctx->dev, "unsupported request: RQSG(0x%02x, 0x%02x, 0x%02x)\n",
|
|
+ rqsg->tc, rqsg->cid, rqsg->iid);
|
|
+
|
|
+ return AE_OK;
|
|
+}
|
|
+
|
|
+
|
|
+static acpi_status
|
|
+surfacegen5_san_opreg_handler(u32 function, acpi_physical_address command,
|
|
+ u32 bits, u64 *value64,
|
|
+ void *opreg_context, void *region_context)
|
|
+{
|
|
+ struct surfacegen5_san_opreg_context *context = opreg_context;
|
|
+ struct gsb_buffer *buffer = (struct gsb_buffer *)value64;
|
|
+ int accessor_type = (0xFFFF0000 & function) >> 16;
|
|
+
|
|
+ if (command != 0) {
|
|
+ dev_warn(context->dev, "unsupported command: 0x%02llx\n", command);
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ if (accessor_type != ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS) {
|
|
+ dev_err(context->dev, "invalid access type: 0x%02x\n", accessor_type);
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ // buffer must have at least contain the command-value
|
|
+ if (buffer->len == 0) {
|
|
+ dev_err(context->dev, "request-package too small\n");
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ switch (buffer->data.in.cv) {
|
|
+ case 0x01: return surfacegen5_san_rqst(context, buffer);
|
|
+ case 0x02: return surfacegen5_san_etwl(context, buffer);
|
|
+ case 0x03: return surfacegen5_san_rqsg(context, buffer);
|
|
+ }
|
|
+
|
|
+ dev_warn(context->dev, "unsupported SAN0 request (cv: 0x%02x)\n", buffer->data.in.cv);
|
|
+ return AE_OK;
|
|
+}
|
|
+
|
|
+static int surfacegen5_san_enable_events(struct device *dev)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_ec_set_delayed_event_handler(
|
|
+ SG5_EVENT_PWR_RQID, surfacegen5_evt_power,
|
|
+ surfacegen5_evt_power_delay, dev);
|
|
+ if (status) {
|
|
+ goto err_event_handler_power;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_set_event_handler(
|
|
+ SG5_EVENT_TEMP_RQID, surfacegen5_evt_thermal,
|
|
+ dev);
|
|
+ if (status) {
|
|
+ goto err_event_handler_thermal;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_enable_event_source(SG5_EVENT_PWR_TC, 0x01, SG5_EVENT_PWR_RQID);
|
|
+ if (status) {
|
|
+ goto err_event_source_power;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_enable_event_source(SG5_EVENT_TEMP_TC, 0x01, SG5_EVENT_TEMP_RQID);
|
|
+ if (status) {
|
|
+ goto err_event_source_thermal;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_event_source_thermal:
|
|
+ surfacegen5_ec_disable_event_source(SG5_EVENT_PWR_TC, 0x01, SG5_EVENT_PWR_RQID);
|
|
+err_event_source_power:
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_TEMP_RQID);
|
|
+err_event_handler_thermal:
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_PWR_RQID);
|
|
+err_event_handler_power:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static void surfacegen5_san_disable_events(void)
|
|
+{
|
|
+ surfacegen5_ec_disable_event_source(SG5_EVENT_TEMP_TC, 0x01, SG5_EVENT_TEMP_RQID);
|
|
+ surfacegen5_ec_disable_event_source(SG5_EVENT_PWR_TC, 0x01, SG5_EVENT_PWR_RQID);
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_TEMP_RQID);
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_PWR_RQID);
|
|
+}
|
|
+
|
|
+
|
|
+static int surfacegen5_san_consumers_link(struct platform_device *pdev,
|
|
+ const struct surfacegen5_san_acpi_consumer *cons,
|
|
+ struct surfacegen5_san_consumers *out)
|
|
+{
|
|
+ const struct surfacegen5_san_acpi_consumer *con;
|
|
+ struct device_link **links, **link;
|
|
+ struct acpi_device *adev;
|
|
+ acpi_handle handle;
|
|
+ u32 max_links = 0;
|
|
+ int status;
|
|
+
|
|
+ if (!cons) {
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ // count links
|
|
+ for (con = cons; con->path; ++con) {
|
|
+ max_links += 1;
|
|
+ }
|
|
+
|
|
+ // allocate
|
|
+ links = kzalloc(max_links * sizeof(struct device_link *), GFP_KERNEL);
|
|
+ link = &links[0];
|
|
+
|
|
+ if (!links) {
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ // create links
|
|
+ for (con = cons; con->path; ++con) {
|
|
+ status = acpi_get_handle(NULL, con->path, &handle);
|
|
+ if (status) {
|
|
+ if (con->required || status != AE_NOT_FOUND) {
|
|
+ status = -ENXIO;
|
|
+ goto consumers_link_cleanup;
|
|
+ } else {
|
|
+ continue;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ status = acpi_bus_get_device(handle, &adev);
|
|
+ if (status) {
|
|
+ goto consumers_link_cleanup;
|
|
+ }
|
|
+
|
|
+ *link = device_link_add(&adev->dev, &pdev->dev, con->flags);
|
|
+ if (!(*link)) {
|
|
+ status = -EFAULT;
|
|
+ goto consumers_link_cleanup;
|
|
+ }
|
|
+
|
|
+ link += 1;
|
|
+ }
|
|
+
|
|
+ out->num = link - links;
|
|
+ out->links = links;
|
|
+
|
|
+ return 0;
|
|
+
|
|
+consumers_link_cleanup:
|
|
+ for (link = link - 1; link >= links; --link) {
|
|
+ device_link_del(*link);
|
|
+ }
|
|
+
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static void surfacegen5_san_consumers_unlink(struct surfacegen5_san_consumers *consumers) {
|
|
+ u32 i;
|
|
+
|
|
+ if (!consumers) {
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ for (i = 0; i < consumers->num; ++i) {
|
|
+ device_link_del(consumers->links[i]);
|
|
+ }
|
|
+
|
|
+ kfree(consumers->links);
|
|
+
|
|
+ consumers->num = 0;
|
|
+ consumers->links = NULL;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_san_probe(struct platform_device *pdev)
|
|
+{
|
|
+ const struct surfacegen5_san_acpi_consumer *cons;
|
|
+ struct surfacegen5_san_drvdata *drvdata;
|
|
+ struct device_link *ec_link;
|
|
+ acpi_handle san = ACPI_HANDLE(&pdev->dev); // _SAN device node
|
|
+ int status;
|
|
+
|
|
+ drvdata = kzalloc(sizeof(struct surfacegen5_san_drvdata), GFP_KERNEL);
|
|
+ if (!drvdata) {
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ /*
|
|
+ * Defer probe if the _SSH driver has not set up the controller yet. This
|
|
+ * makes sure we do not fail any initial requests (e.g. _STA request without
|
|
+ * which the battery does not get set up correctly). Otherwise register as
|
|
+ * consumer to set up a device_link.
|
|
+ */
|
|
+ ec_link = surfacegen5_ec_consumer_add(&pdev->dev, DL_FLAG_PM_RUNTIME);
|
|
+ if (IS_ERR_OR_NULL(ec_link)) {
|
|
+ if (PTR_ERR(ec_link) == -ENXIO) {
|
|
+ status = -EPROBE_DEFER;
|
|
+ } else {
|
|
+ status = -EFAULT;
|
|
+ }
|
|
+
|
|
+ goto err_probe_ec_link;
|
|
+ }
|
|
+
|
|
+ drvdata->ec_link = ec_link;
|
|
+ drvdata->opreg_ctx.dev = &pdev->dev;
|
|
+
|
|
+ cons = acpi_device_get_match_data(&pdev->dev);
|
|
+ status = surfacegen5_san_consumers_link(pdev, cons, &drvdata->consumers);
|
|
+ if (status) {
|
|
+ goto err_probe_consumers;
|
|
+ }
|
|
+
|
|
+ platform_set_drvdata(pdev, drvdata);
|
|
+
|
|
+ status = acpi_install_address_space_handler(san,
|
|
+ ACPI_ADR_SPACE_GSBUS,
|
|
+ &surfacegen5_san_opreg_handler,
|
|
+ NULL, &drvdata->opreg_ctx);
|
|
+
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ status = -ENODEV;
|
|
+ goto err_probe_install_handler;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_san_enable_events(&pdev->dev);
|
|
+ if (status) {
|
|
+ goto err_probe_enable_events;
|
|
+ }
|
|
+
|
|
+ acpi_walk_dep_device_list(san);
|
|
+ return 0;
|
|
+
|
|
+err_probe_enable_events:
|
|
+ acpi_remove_address_space_handler(san, ACPI_ADR_SPACE_GSBUS, &surfacegen5_san_opreg_handler);
|
|
+err_probe_install_handler:
|
|
+ platform_set_drvdata(san, NULL);
|
|
+ surfacegen5_san_consumers_unlink(&drvdata->consumers);
|
|
+err_probe_consumers:
|
|
+ surfacegen5_ec_consumer_remove(drvdata->ec_link);
|
|
+err_probe_ec_link:
|
|
+ kfree(drvdata);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_san_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct surfacegen5_san_drvdata *drvdata = platform_get_drvdata(pdev);
|
|
+ acpi_handle san = ACPI_HANDLE(&pdev->dev); // _SAN device node
|
|
+ acpi_status status = AE_OK;
|
|
+
|
|
+ acpi_remove_address_space_handler(san, ACPI_ADR_SPACE_GSBUS, &surfacegen5_san_opreg_handler);
|
|
+ surfacegen5_san_disable_events();
|
|
+
|
|
+ surfacegen5_san_consumers_unlink(&drvdata->consumers);
|
|
+ surfacegen5_ec_consumer_remove(drvdata->ec_link);
|
|
+ kfree(drvdata);
|
|
+
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+
|
|
+static const struct surfacegen5_san_acpi_consumer surfacegen5_mshw0091_consumers[] = {
|
|
+ { "\\_SB.SRTC", true, DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS },
|
|
+ { "\\ADP1", true, DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS },
|
|
+ { "\\_SB.BAT1", true, DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS },
|
|
+ { "\\_SB.BAT2", false, DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS },
|
|
+ { },
|
|
+};
|
|
+
|
|
+static const struct acpi_device_id surfacegen5_acpi_san_match[] = {
|
|
+ { "MSHW0091", (long unsigned int) surfacegen5_mshw0091_consumers },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, surfacegen5_acpi_san_match);
|
|
+
|
|
+struct platform_driver surfacegen5_acpi_san = {
|
|
+ .probe = surfacegen5_acpi_san_probe,
|
|
+ .remove = surfacegen5_acpi_san_remove,
|
|
+ .driver = {
|
|
+ .name = "surfacegen5_acpi_san",
|
|
+ .acpi_match_table = ACPI_PTR(surfacegen5_acpi_san_match),
|
|
+ },
|
|
+};
|
|
+
|
|
+
|
|
+inline int surfacegen5_acpi_san_register(void)
|
|
+{
|
|
+ return platform_driver_register(&surfacegen5_acpi_san);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_san_unregister(void)
|
|
+{
|
|
+ platform_driver_unregister(&surfacegen5_acpi_san);
|
|
+}
|
|
+
|
|
+#else /* CONFIG_SURFACE_ACPI_SAN */
|
|
+
|
|
+inline int surfacegen5_acpi_san_register(void)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_san_unregister(void)
|
|
+{
|
|
+}
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_SAN */
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Virtual HID Framework driver
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SURFACE_ACPI_VHF
|
|
+
|
|
+#define SG5_VHF_INPUT_NAME "Microsoft Virtual HID Framework Device"
|
|
+
|
|
+/*
|
|
+ * Request ID for VHF events. This value is based on the output of the Surface
|
|
+ * EC and should not be changed.
|
|
+ */
|
|
+#define SG5_VHF_RQID 0x0001
|
|
+
|
|
+
|
|
+struct surfacegen5_vhf_evtctx {
|
|
+ struct device *dev;
|
|
+ struct hid_device *hid;
|
|
+};
|
|
+
|
|
+struct surfacegen5_vhf_drvdata {
|
|
+ struct device_link *ec_link;
|
|
+ struct surfacegen5_vhf_evtctx event_ctx;
|
|
+};
|
|
+
|
|
+
|
|
+/*
|
|
+ * These report descriptors have been extracted from a Surface Book 2.
|
|
+ * They seems to be similar enough to be usable on the Surface Laptop.
|
|
+ */
|
|
+static const u8 vhf_hid_desc[] = {
|
|
+ // keyboard descriptor (event command ID 0x03)
|
|
+ 0x05, 0x01, /* Usage Page (Desktop), */
|
|
+ 0x09, 0x06, /* Usage (Keyboard), */
|
|
+ 0xA1, 0x01, /* Collection (Application), */
|
|
+ 0x85, 0x01, /* Report ID (1), */
|
|
+ 0x15, 0x00, /* Logical Minimum (0), */
|
|
+ 0x25, 0x01, /* Logical Maximum (1), */
|
|
+ 0x75, 0x01, /* Report Size (1), */
|
|
+ 0x95, 0x08, /* Report Count (8), */
|
|
+ 0x05, 0x07, /* Usage Page (Keyboard), */
|
|
+ 0x19, 0xE0, /* Usage Minimum (KB Leftcontrol), */
|
|
+ 0x29, 0xE7, /* Usage Maximum (KB Right GUI), */
|
|
+ 0x81, 0x02, /* Input (Variable), */
|
|
+ 0x75, 0x08, /* Report Size (8), */
|
|
+ 0x95, 0x0A, /* Report Count (10), */
|
|
+ 0x19, 0x00, /* Usage Minimum (None), */
|
|
+ 0x29, 0x91, /* Usage Maximum (KB LANG2), */
|
|
+ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */
|
|
+ 0x81, 0x00, /* Input, */
|
|
+ 0x05, 0x0C, /* Usage Page (Consumer), */
|
|
+ 0x0A, 0xC0, 0x02, /* Usage (02C0h), */
|
|
+ 0xA1, 0x02, /* Collection (Logical), */
|
|
+ 0x1A, 0xC1, 0x02, /* Usage Minimum (02C1h), */
|
|
+ 0x2A, 0xC6, 0x02, /* Usage Maximum (02C6h), */
|
|
+ 0x95, 0x06, /* Report Count (6), */
|
|
+ 0xB1, 0x03, /* Feature (Constant, Variable), */
|
|
+ 0xC0, /* End Collection, */
|
|
+ 0x05, 0x08, /* Usage Page (LED), */
|
|
+ 0x19, 0x01, /* Usage Minimum (01h), */
|
|
+ 0x29, 0x03, /* Usage Maximum (03h), */
|
|
+ 0x75, 0x01, /* Report Size (1), */
|
|
+ 0x95, 0x03, /* Report Count (3), */
|
|
+ 0x25, 0x01, /* Logical Maximum (1), */
|
|
+ 0x91, 0x02, /* Output (Variable), */
|
|
+ 0x95, 0x05, /* Report Count (5), */
|
|
+ 0x91, 0x01, /* Output (Constant), */
|
|
+ 0xC0, /* End Collection, */
|
|
+
|
|
+ // media key descriptor (event command ID 0x04)
|
|
+ 0x05, 0x0C, /* Usage Page (Consumer), */
|
|
+ 0x09, 0x01, /* Usage (Consumer Control), */
|
|
+ 0xA1, 0x01, /* Collection (Application), */
|
|
+ 0x85, 0x03, /* Report ID (3), */
|
|
+ 0x75, 0x10, /* Report Size (16), */
|
|
+ 0x15, 0x00, /* Logical Minimum (0), */
|
|
+ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
|
|
+ 0x19, 0x00, /* Usage Minimum (00h), */
|
|
+ 0x2A, 0xFF, 0x03, /* Usage Maximum (03FFh), */
|
|
+ 0x81, 0x00, /* Input, */
|
|
+ 0xC0, /* End Collection, */
|
|
+};
|
|
+
|
|
+
|
|
+static int vhf_hid_start(struct hid_device *hid)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void vhf_hid_stop(struct hid_device *hid)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+}
|
|
+
|
|
+static int vhf_hid_open(struct hid_device *hid)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void vhf_hid_close(struct hid_device *hid)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+}
|
|
+
|
|
+static int vhf_hid_parse(struct hid_device *hid)
|
|
+{
|
|
+ return hid_parse_report(hid, (u8 *)vhf_hid_desc, ARRAY_SIZE(vhf_hid_desc));
|
|
+}
|
|
+
|
|
+static int vhf_hid_raw_request(struct hid_device *hid, unsigned char reportnum,
|
|
+ u8 *buf, size_t len, unsigned char rtype,
|
|
+ int reqtype)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int vhf_hid_output_report(struct hid_device *hid, u8 *buf, size_t len)
|
|
+{
|
|
+ hid_dbg(hid, "%s\n", __func__);
|
|
+ print_hex_dump_debug("report:", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false);
|
|
+
|
|
+ return len;
|
|
+}
|
|
+
|
|
+static struct hid_ll_driver vhf_hid_ll_driver = {
|
|
+ .start = vhf_hid_start,
|
|
+ .stop = vhf_hid_stop,
|
|
+ .open = vhf_hid_open,
|
|
+ .close = vhf_hid_close,
|
|
+ .parse = vhf_hid_parse,
|
|
+ .raw_request = vhf_hid_raw_request,
|
|
+ .output_report = vhf_hid_output_report,
|
|
+};
|
|
+
|
|
+
|
|
+static struct hid_device *surfacegen5_vhf_create_hid_device(struct platform_device *pdev)
|
|
+{
|
|
+ struct hid_device *hid;
|
|
+
|
|
+ hid = hid_allocate_device();
|
|
+ if (IS_ERR(hid)) {
|
|
+ return hid;
|
|
+ }
|
|
+
|
|
+ hid->dev.parent = &pdev->dev;
|
|
+
|
|
+ hid->bus = BUS_VIRTUAL;
|
|
+ hid->vendor = USB_VENDOR_ID_MICROSOFT;
|
|
+ hid->product = USB_DEVICE_ID_MS_VHF;
|
|
+
|
|
+ hid->ll_driver = &vhf_hid_ll_driver;
|
|
+
|
|
+ sprintf(hid->name, "%s", SG5_VHF_INPUT_NAME);
|
|
+
|
|
+ return hid;
|
|
+}
|
|
+
|
|
+static int surfacegen5_vhf_event_handler(struct surfacegen5_event *event, void *data)
|
|
+{
|
|
+ struct surfacegen5_vhf_evtctx *ctx = (struct surfacegen5_vhf_evtctx *)data;
|
|
+
|
|
+ if (event->tc == 0x08 && (event->cid == 0x03 || event->cid == 0x04)) {
|
|
+ return hid_input_report(ctx->hid, HID_INPUT_REPORT, event->pld, event->len, 1);
|
|
+ }
|
|
+
|
|
+ dev_warn(ctx->dev, "unsupported event (tc = %d, cid = %d)\n", event->tc, event->cid);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static unsigned long surfacegen5_vhf_event_delay(struct surfacegen5_event *event, void *data)
|
|
+{
|
|
+ // high priority immediate execution for keyboard events
|
|
+ if (event->tc == 0x08 && (event->cid == 0x03 || event->cid == 0x04)) {
|
|
+ return SURFACEGEN5_EVENT_IMMEDIATE;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_vhf_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct surfacegen5_vhf_drvdata *drvdata;
|
|
+ struct device_link *ec_link;
|
|
+ struct hid_device *hid;
|
|
+ int status;
|
|
+
|
|
+ drvdata = kzalloc(sizeof(struct surfacegen5_vhf_drvdata), GFP_KERNEL);
|
|
+ if (!drvdata) {
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ // add device link to EC
|
|
+ ec_link = surfacegen5_ec_consumer_add(&pdev->dev, DL_FLAG_PM_RUNTIME);
|
|
+ if (IS_ERR_OR_NULL(ec_link)) {
|
|
+ if (PTR_ERR(ec_link) == -ENXIO) {
|
|
+ status = -EPROBE_DEFER;
|
|
+ } else {
|
|
+ status = -EFAULT;
|
|
+ }
|
|
+
|
|
+ goto err_probe_ec_link;
|
|
+ }
|
|
+
|
|
+ hid = surfacegen5_vhf_create_hid_device(pdev);
|
|
+ if (IS_ERR(hid)) {
|
|
+ status = PTR_ERR(hid);
|
|
+ goto err_probe_hid;
|
|
+ }
|
|
+
|
|
+ status = hid_add_device(hid);
|
|
+ if (status) {
|
|
+ goto err_add_hid;
|
|
+ }
|
|
+
|
|
+ drvdata->ec_link = ec_link;
|
|
+ drvdata->event_ctx.dev = &pdev->dev;
|
|
+ drvdata->event_ctx.hid = hid;
|
|
+
|
|
+ platform_set_drvdata(pdev, drvdata);
|
|
+
|
|
+ /*
|
|
+ * Set event hanlder for VHF events. They seem to be enabled by
|
|
+ * default, thus there should be no need to explicitly enable them.
|
|
+ */
|
|
+ status = surfacegen5_ec_set_delayed_event_handler(
|
|
+ SG5_VHF_RQID,
|
|
+ surfacegen5_vhf_event_handler,
|
|
+ surfacegen5_vhf_event_delay,
|
|
+ &drvdata->event_ctx);
|
|
+ if (status) {
|
|
+ goto err_add_hid;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_add_hid:
|
|
+ hid_destroy_device(hid);
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+err_probe_hid:
|
|
+ surfacegen5_ec_consumer_remove(drvdata->ec_link);
|
|
+err_probe_ec_link:
|
|
+ kfree(drvdata);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_vhf_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct surfacegen5_vhf_drvdata *drvdata = platform_get_drvdata(pdev);
|
|
+
|
|
+ surfacegen5_ec_remove_event_handler(SG5_VHF_RQID);
|
|
+
|
|
+ hid_destroy_device(drvdata->event_ctx.hid);
|
|
+ surfacegen5_ec_consumer_remove(drvdata->ec_link);
|
|
+ kfree(drvdata);
|
|
+
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static const struct acpi_device_id surfacegen5_acpi_vhf_match[] = {
|
|
+ { "MSHW0096" },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, surfacegen5_acpi_vhf_match);
|
|
+
|
|
+struct platform_driver surfacegen5_acpi_vhf = {
|
|
+ .probe = surfacegen5_acpi_vhf_probe,
|
|
+ .remove = surfacegen5_acpi_vhf_remove,
|
|
+ .driver = {
|
|
+ .name = "surfacegen5_acpi_vhf",
|
|
+ .acpi_match_table = ACPI_PTR(surfacegen5_acpi_vhf_match),
|
|
+ },
|
|
+};
|
|
+
|
|
+
|
|
+inline int surfacegen5_acpi_vhf_register(void)
|
|
+{
|
|
+ return platform_driver_register(&surfacegen5_acpi_vhf);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_vhf_unregister(void)
|
|
+{
|
|
+ platform_driver_unregister(&surfacegen5_acpi_vhf);
|
|
+}
|
|
+
|
|
+#else /* CONFIG_SURFACE_ACPI_VHF */
|
|
+
|
|
+inline int surfacegen5_acpi_vhf_register(void)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_vhf_unregister(void)
|
|
+{
|
|
+}
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_VHF */
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Detachment System Driver (DTX)
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SURFACE_ACPI_DTX
|
|
+
|
|
+#define SG5_DTX_INPUT_NAME "Microsoft Surface Base 2 Integration Device"
|
|
+
|
|
+#define DTX_CMD_LATCH_LOCK _IO(0x11, 0x01)
|
|
+#define DTX_CMD_LATCH_UNLOCK _IO(0x11, 0x02)
|
|
+#define DTX_CMD_LATCH_REQUEST _IO(0x11, 0x03)
|
|
+#define DTX_CMD_LATCH_OPEN _IO(0x11, 0x04)
|
|
+#define DTX_CMD_GET_OPMODE _IOR(0x11, 0x05, int)
|
|
+
|
|
+#define SG5_RQST_DTX_TC 0x11
|
|
+#define SG5_RQST_DTX_CID_LATCH_LOCK 0x06
|
|
+#define SG5_RQST_DTX_CID_LATCH_UNLOCK 0x07
|
|
+#define SG5_RQST_DTX_CID_LATCH_REQUEST 0x08
|
|
+#define SG5_RQST_DTX_CID_LATCH_OPEN 0x09
|
|
+#define SG5_RQST_DTX_CID_GET_OPMODE 0x0D
|
|
+
|
|
+#define SG5_EVENT_DTX_TC 0x11
|
|
+#define SG5_EVENT_DTX_RQID 0x0011
|
|
+#define SG5_EVENT_DTX_CID_CONNECTION 0x0c
|
|
+#define SG5_EVENT_DTX_CID_BUTTON 0x0e
|
|
+#define SG5_EVENT_DTX_CID_ERROR 0x0f
|
|
+#define SG5_EVENT_DTX_CID_LATCH_STATUS 0x11
|
|
+
|
|
+#define DTX_OPMODE_TABLET 0x00
|
|
+#define DTX_OPMODE_LAPTOP 0x01
|
|
+#define DTX_OPMODE_STUDIO 0x02
|
|
+
|
|
+#define DTX_LATCH_CLOSED 0x00
|
|
+#define DTX_LATCH_OPENED 0x01
|
|
+
|
|
+// Warning: This must always be a power of 2!
|
|
+#define SURFACE_DTX_CLIENT_BUF_SIZE 16
|
|
+
|
|
+#define SG5_DTX_CONNECT_OPMODE_DELAY 1000
|
|
+
|
|
+#define DTX_ERR KERN_ERR "surfacegen5_acpi_dtx: "
|
|
+#define DTX_WARN KERN_WARNING "surfacegen5_acpi_dtx: "
|
|
+
|
|
+
|
|
+struct surface_dtx_event {
|
|
+ u8 type;
|
|
+ u8 code;
|
|
+ u8 arg0;
|
|
+ u8 arg1;
|
|
+} __packed;
|
|
+
|
|
+struct surface_dtx_dev {
|
|
+ wait_queue_head_t waitq;
|
|
+ struct miscdevice mdev;
|
|
+ spinlock_t client_lock;
|
|
+ struct list_head client_list;
|
|
+ struct mutex mutex;
|
|
+ bool active;
|
|
+ struct device_link *ec_link;
|
|
+ spinlock_t input_lock;
|
|
+ struct input_dev *input_dev;
|
|
+};
|
|
+
|
|
+struct surface_dtx_client {
|
|
+ struct list_head node;
|
|
+ struct surface_dtx_dev *ddev;
|
|
+ struct fasync_struct *fasync;
|
|
+ spinlock_t buffer_lock;
|
|
+ unsigned int buffer_head;
|
|
+ unsigned int buffer_tail;
|
|
+ struct surface_dtx_event buffer[SURFACE_DTX_CLIENT_BUF_SIZE];
|
|
+};
|
|
+
|
|
+
|
|
+static struct surface_dtx_dev surface_dtx_dev;
|
|
+
|
|
+
|
|
+static int sg5_ec_query_opmpde(void)
|
|
+{
|
|
+ u8 result_buf[1];
|
|
+ int status;
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = SG5_RQST_DTX_TC,
|
|
+ .iid = 0,
|
|
+ .cid = SG5_RQST_DTX_CID_GET_OPMODE,
|
|
+ .snc = 1,
|
|
+ .cdl = 0,
|
|
+ .pld = NULL,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ .cap = 1,
|
|
+ .len = 0,
|
|
+ .data = result_buf,
|
|
+ };
|
|
+
|
|
+ status = surfacegen5_ec_rqst(&rqst, &result);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (result.len != 1) {
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ return result.data[0];
|
|
+}
|
|
+
|
|
+
|
|
+static int dtx_cmd_simple(u8 cid)
|
|
+{
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = SG5_RQST_DTX_TC,
|
|
+ .iid = 0,
|
|
+ .cid = cid,
|
|
+ .snc = 0,
|
|
+ .cdl = 0,
|
|
+ .pld = NULL,
|
|
+ };
|
|
+
|
|
+ return surfacegen5_ec_rqst(&rqst, NULL);
|
|
+}
|
|
+
|
|
+static int dtx_cmd_get_opmode(int __user *buf)
|
|
+{
|
|
+ int opmode = sg5_ec_query_opmpde();
|
|
+ if (opmode < 0) {
|
|
+ return opmode;
|
|
+ }
|
|
+
|
|
+ if (put_user(opmode, buf)) {
|
|
+ return -EACCES;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int surface_dtx_open(struct inode *inode, struct file *file)
|
|
+{
|
|
+ struct surface_dtx_dev *ddev = container_of(file->private_data, struct surface_dtx_dev, mdev);
|
|
+ struct surface_dtx_client *client;
|
|
+
|
|
+ // initialize client
|
|
+ client = kzalloc(sizeof(struct surface_dtx_client), GFP_KERNEL);
|
|
+ if (!client) {
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ spin_lock_init(&client->buffer_lock);
|
|
+ client->buffer_head = 0;
|
|
+ client->buffer_tail = 0;
|
|
+ client->ddev = ddev;
|
|
+
|
|
+ // attach client
|
|
+ spin_lock(&ddev->client_lock);
|
|
+ list_add_tail_rcu(&client->node, &ddev->client_list);
|
|
+ spin_unlock(&ddev->client_lock);
|
|
+
|
|
+ file->private_data = client;
|
|
+ nonseekable_open(inode, file);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surface_dtx_release(struct inode *inode, struct file *file)
|
|
+{
|
|
+ struct surface_dtx_client *client = file->private_data;
|
|
+
|
|
+ // detach client
|
|
+ spin_lock(&client->ddev->client_lock);
|
|
+ list_del_rcu(&client->node);
|
|
+ spin_unlock(&client->ddev->client_lock);
|
|
+ synchronize_rcu();
|
|
+
|
|
+ kfree(client);
|
|
+ file->private_data = NULL;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static ssize_t surface_dtx_read(struct file *file, char __user *buf, size_t count, loff_t *offs)
|
|
+{
|
|
+ struct surface_dtx_client *client = file->private_data;
|
|
+ struct surface_dtx_dev *ddev = client->ddev;
|
|
+ struct surface_dtx_event event;
|
|
+ size_t read = 0;
|
|
+ int status = 0;
|
|
+
|
|
+ if (count != 0 && count < sizeof(struct surface_dtx_event)) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ if (!ddev->active) {
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ // check availability
|
|
+ if (client->buffer_head == client->buffer_tail){
|
|
+ if (file->f_flags & O_NONBLOCK) {
|
|
+ return -EAGAIN;
|
|
+ }
|
|
+
|
|
+ status = wait_event_interruptible(ddev->waitq,
|
|
+ client->buffer_head != client->buffer_tail ||
|
|
+ !ddev->active);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (!ddev->active) {
|
|
+ return -ENODEV;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ // copy events one by one
|
|
+ while (read + sizeof(struct surface_dtx_event) <= count) {
|
|
+ spin_lock_irq(&client->buffer_lock);
|
|
+
|
|
+ if(client->buffer_head == client->buffer_tail) {
|
|
+ spin_unlock_irq(&client->buffer_lock);
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ // get one event
|
|
+ event = client->buffer[client->buffer_tail];
|
|
+ client->buffer_tail = (client->buffer_tail + 1) & (SURFACE_DTX_CLIENT_BUF_SIZE - 1);
|
|
+ spin_unlock_irq(&client->buffer_lock);
|
|
+
|
|
+ // copy to userspace
|
|
+ if(copy_to_user(buf, &event, sizeof(struct surface_dtx_event))) {
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ read += sizeof(struct surface_dtx_event);
|
|
+ }
|
|
+
|
|
+ return read;
|
|
+}
|
|
+
|
|
+static __poll_t surface_dtx_poll(struct file *file, struct poll_table_struct *pt)
|
|
+{
|
|
+ struct surface_dtx_client *client = file->private_data;
|
|
+ int mask;
|
|
+
|
|
+ poll_wait(file, &client->ddev->waitq, pt);
|
|
+
|
|
+ if (client->ddev->active) {
|
|
+ mask = EPOLLOUT | EPOLLWRNORM;
|
|
+ } else {
|
|
+ mask = EPOLLHUP | EPOLLERR;
|
|
+ }
|
|
+
|
|
+ if (client->buffer_head != client->buffer_tail) {
|
|
+ mask |= EPOLLIN | EPOLLRDNORM;
|
|
+ }
|
|
+
|
|
+ return mask;
|
|
+}
|
|
+
|
|
+static int surface_dtx_fasync(int fd, struct file *file, int on)
|
|
+{
|
|
+ struct surface_dtx_client *client = file->private_data;
|
|
+
|
|
+ return fasync_helper(fd, file, on, &client->fasync);
|
|
+}
|
|
+
|
|
+static long surface_dtx_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
+{
|
|
+ struct surface_dtx_client *client = file->private_data;
|
|
+ struct surface_dtx_dev *ddev = client->ddev;
|
|
+ int status;
|
|
+
|
|
+ status = mutex_lock_interruptible(&ddev->mutex);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (!ddev->active) {
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ switch (cmd) {
|
|
+ case DTX_CMD_LATCH_LOCK:
|
|
+ status = dtx_cmd_simple(SG5_RQST_DTX_CID_LATCH_LOCK);
|
|
+ break;
|
|
+
|
|
+ case DTX_CMD_LATCH_UNLOCK:
|
|
+ status = dtx_cmd_simple(SG5_RQST_DTX_CID_LATCH_UNLOCK);
|
|
+ break;
|
|
+
|
|
+ case DTX_CMD_LATCH_REQUEST:
|
|
+ status = dtx_cmd_simple(SG5_RQST_DTX_CID_LATCH_REQUEST);
|
|
+ break;
|
|
+
|
|
+ case DTX_CMD_LATCH_OPEN:
|
|
+ status = dtx_cmd_simple(SG5_RQST_DTX_CID_LATCH_OPEN);
|
|
+ break;
|
|
+
|
|
+ case DTX_CMD_GET_OPMODE:
|
|
+ status = dtx_cmd_get_opmode((int __user *)arg);
|
|
+ break;
|
|
+
|
|
+ default:
|
|
+ status = -EINVAL;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static const struct file_operations surface_dtx_fops = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .open = surface_dtx_open,
|
|
+ .release = surface_dtx_release,
|
|
+ .read = surface_dtx_read,
|
|
+ .poll = surface_dtx_poll,
|
|
+ .fasync = surface_dtx_fasync,
|
|
+ .unlocked_ioctl = surface_dtx_ioctl,
|
|
+ .llseek = no_llseek,
|
|
+};
|
|
+
|
|
+static struct surface_dtx_dev surface_dtx_dev = {
|
|
+ .mdev = {
|
|
+ .minor = MISC_DYNAMIC_MINOR,
|
|
+ .name = "surface_dtx",
|
|
+ .fops = &surface_dtx_fops,
|
|
+ },
|
|
+ .client_lock = __SPIN_LOCK_UNLOCKED(),
|
|
+ .input_lock = __SPIN_LOCK_UNLOCKED(),
|
|
+ .mutex = __MUTEX_INITIALIZER(surface_dtx_dev.mutex),
|
|
+ .active = false,
|
|
+};
|
|
+
|
|
+
|
|
+static void surface_dtx_push_event(struct surface_dtx_dev *ddev, struct surface_dtx_event *event)
|
|
+{
|
|
+ struct surface_dtx_client *client;
|
|
+
|
|
+ rcu_read_lock();
|
|
+ list_for_each_entry_rcu(client, &ddev->client_list, node) {
|
|
+ spin_lock(&client->buffer_lock);
|
|
+
|
|
+ client->buffer[client->buffer_head++] = *event;
|
|
+ client->buffer_head &= SURFACE_DTX_CLIENT_BUF_SIZE - 1;
|
|
+
|
|
+ if (unlikely(client->buffer_head == client->buffer_tail)) {
|
|
+ printk(DTX_WARN "event buffer overrun\n");
|
|
+ client->buffer_tail = (client->buffer_tail + 1) & (SURFACE_DTX_CLIENT_BUF_SIZE - 1);
|
|
+ }
|
|
+
|
|
+ spin_unlock(&client->buffer_lock);
|
|
+
|
|
+ kill_fasync(&client->fasync, SIGIO, POLL_IN);
|
|
+ }
|
|
+ rcu_read_unlock();
|
|
+
|
|
+ wake_up_interruptible(&ddev->waitq);
|
|
+}
|
|
+
|
|
+
|
|
+static void surface_dtx_update_opmpde(struct surface_dtx_dev *ddev)
|
|
+{
|
|
+ struct surface_dtx_event event;
|
|
+ int opmode;
|
|
+
|
|
+ // get operation mode
|
|
+ opmode = sg5_ec_query_opmpde();
|
|
+ if (opmode < 0) {
|
|
+ printk(DTX_ERR "EC request failed with error %d\n", opmode);
|
|
+ }
|
|
+
|
|
+ // send DTX event
|
|
+ event.type = 0x11;
|
|
+ event.code = 0x0D;
|
|
+ event.arg0 = opmode;
|
|
+ event.arg1 = 0x00;
|
|
+
|
|
+ surface_dtx_push_event(ddev, &event);
|
|
+
|
|
+ // send SW_TABLET_MODE event
|
|
+ spin_lock(&ddev->input_lock);
|
|
+ input_report_switch(ddev->input_dev, SW_TABLET_MODE, opmode == 0x00);
|
|
+ input_sync(ddev->input_dev);
|
|
+ spin_unlock(&ddev->input_lock);
|
|
+}
|
|
+
|
|
+static int surface_dtx_evt_dtx(struct surfacegen5_event *in_event, void *data)
|
|
+{
|
|
+ struct surface_dtx_dev *ddev = data;
|
|
+ struct surface_dtx_event event;
|
|
+
|
|
+ switch (in_event->cid) {
|
|
+ case SG5_EVENT_DTX_CID_CONNECTION:
|
|
+ case SG5_EVENT_DTX_CID_BUTTON:
|
|
+ case SG5_EVENT_DTX_CID_ERROR:
|
|
+ case SG5_EVENT_DTX_CID_LATCH_STATUS:
|
|
+ if (in_event->len > 2) {
|
|
+ printk(DTX_ERR "unexpected payload size (cid: %x, len: %u)\n",
|
|
+ in_event->cid, in_event->len);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ event.type = in_event->tc;
|
|
+ event.code = in_event->cid;
|
|
+ event.arg0 = in_event->len >= 1 ? in_event->pld[0] : 0x00;
|
|
+ event.arg1 = in_event->len >= 2 ? in_event->pld[1] : 0x00;
|
|
+ surface_dtx_push_event(ddev, &event);
|
|
+ break;
|
|
+
|
|
+ default:
|
|
+ printk(DTX_WARN "unhandled dtx event (cid: %x)\n", in_event->cid);
|
|
+ }
|
|
+
|
|
+ // update device mode
|
|
+ if (in_event->cid == SG5_EVENT_DTX_CID_CONNECTION) {
|
|
+ if (in_event->pld[0]) {
|
|
+ // Note: we're already in a workqueue task
|
|
+ msleep(SG5_DTX_CONNECT_OPMODE_DELAY);
|
|
+ }
|
|
+
|
|
+ surface_dtx_update_opmpde(ddev);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int surface_dtx_events_setup(struct surface_dtx_dev *ddev)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_ec_set_event_handler(SG5_EVENT_DTX_RQID, surface_dtx_evt_dtx, ddev);
|
|
+ if (status) {
|
|
+ goto err_event_handler;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_ec_enable_event_source(SG5_EVENT_DTX_TC, 0x01, SG5_EVENT_DTX_RQID);
|
|
+ if (status) {
|
|
+ goto err_event_source;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_event_source:
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_DTX_RQID);
|
|
+err_event_handler:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static void surface_dtx_events_disable(void)
|
|
+{
|
|
+ surfacegen5_ec_disable_event_source(SG5_EVENT_DTX_TC, 0x01, SG5_EVENT_DTX_RQID);
|
|
+ surfacegen5_ec_remove_event_handler(SG5_EVENT_DTX_RQID);
|
|
+}
|
|
+
|
|
+
|
|
+static struct input_dev *surface_dtx_register_inputdev(struct platform_device *pdev)
|
|
+{
|
|
+ struct input_dev *input_dev;
|
|
+ int status;
|
|
+
|
|
+ input_dev = input_allocate_device();
|
|
+ if (!input_dev) {
|
|
+ return ERR_PTR(-ENOMEM);
|
|
+ }
|
|
+
|
|
+ input_dev->name = SG5_DTX_INPUT_NAME;
|
|
+ input_dev->dev.parent = &pdev->dev;
|
|
+ input_dev->id.bustype = BUS_VIRTUAL;
|
|
+ input_dev->id.vendor = USB_VENDOR_ID_MICROSOFT;
|
|
+ input_dev->id.product = USB_DEVICE_ID_MS_SURFACE_BASE_2_INTEGRATION;
|
|
+
|
|
+ input_set_capability(input_dev, EV_SW, SW_TABLET_MODE);
|
|
+
|
|
+ status = sg5_ec_query_opmpde();
|
|
+ if (status < 0) {
|
|
+ input_free_device(input_dev);
|
|
+ return ERR_PTR(status);
|
|
+ }
|
|
+
|
|
+ input_report_switch(input_dev, SW_TABLET_MODE, status == 0x00);
|
|
+
|
|
+ status = input_register_device(input_dev);
|
|
+ if (status) {
|
|
+ input_unregister_device(input_dev);
|
|
+ return ERR_PTR(status);
|
|
+ }
|
|
+
|
|
+ return input_dev;
|
|
+}
|
|
+
|
|
+
|
|
+static int surfacegen5_acpi_dtx_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct surface_dtx_dev *ddev = &surface_dtx_dev;
|
|
+ struct device_link *ec_link;
|
|
+ struct input_dev *input_dev;
|
|
+ int status;
|
|
+
|
|
+ // link to ec
|
|
+ ec_link = surfacegen5_ec_consumer_add(&pdev->dev, DL_FLAG_PM_RUNTIME);
|
|
+ if (IS_ERR_OR_NULL(ec_link)) {
|
|
+ if (PTR_ERR(ec_link) == -ENXIO) {
|
|
+ // Defer probe if the _SSH driver has not set up the controller yet.
|
|
+ status = -EPROBE_DEFER;
|
|
+ } else {
|
|
+ status = -EFAULT;
|
|
+ }
|
|
+
|
|
+ goto err_probe_ec_link;
|
|
+ }
|
|
+
|
|
+ input_dev = surface_dtx_register_inputdev(pdev);
|
|
+ if (IS_ERR(input_dev)) {
|
|
+ status = PTR_ERR(input_dev);
|
|
+ goto err_input_dev;
|
|
+ }
|
|
+
|
|
+ // initialize device
|
|
+ mutex_lock(&ddev->mutex);
|
|
+ if (ddev->active) {
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+ status = -ENODEV;
|
|
+ goto err_register;
|
|
+ }
|
|
+
|
|
+ INIT_LIST_HEAD(&ddev->client_list);
|
|
+ init_waitqueue_head(&ddev->waitq);
|
|
+ ddev->active = true;
|
|
+ ddev->ec_link = ec_link;
|
|
+ ddev->input_dev = input_dev;
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+
|
|
+ status = misc_register(&ddev->mdev);
|
|
+ if (status) {
|
|
+ goto err_register;
|
|
+ }
|
|
+
|
|
+ // enable events
|
|
+ status = surface_dtx_events_setup(ddev);
|
|
+ if (status) {
|
|
+ goto err_events_setup;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_events_setup:
|
|
+ misc_deregister(&ddev->mdev);
|
|
+err_register:
|
|
+ input_unregister_device(ddev->input_dev);
|
|
+err_input_dev:
|
|
+ surfacegen5_ec_consumer_remove(ec_link);
|
|
+err_probe_ec_link:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_dtx_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct surface_dtx_dev *ddev = &surface_dtx_dev;
|
|
+ struct surface_dtx_client *client;
|
|
+
|
|
+ mutex_lock(&ddev->mutex);
|
|
+ if (!ddev->active) {
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ // mark as inactive
|
|
+ ddev->active = false;
|
|
+ mutex_unlock(&ddev->mutex);
|
|
+
|
|
+ // After this call we're guaranteed that no more input events will arive
|
|
+ surface_dtx_events_disable();
|
|
+
|
|
+ // wake up clients
|
|
+ spin_lock(&ddev->client_lock);
|
|
+ list_for_each_entry(client, &ddev->client_list, node) {
|
|
+ kill_fasync(&client->fasync, SIGIO, POLL_HUP);
|
|
+ }
|
|
+ spin_unlock(&ddev->client_lock);
|
|
+
|
|
+ wake_up_interruptible(&ddev->waitq);
|
|
+
|
|
+ // unregister user-space devices
|
|
+ input_unregister_device(ddev->input_dev);
|
|
+ misc_deregister(&ddev->mdev);
|
|
+
|
|
+ // unlink
|
|
+ surfacegen5_ec_consumer_remove(ddev->ec_link);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static const struct acpi_device_id surfacegen5_acpi_dtx_match[] = {
|
|
+ { "MSHW0133", 0 },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, surfacegen5_acpi_dtx_match);
|
|
+
|
|
+struct platform_driver surfacegen5_acpi_dtx = {
|
|
+ .probe = surfacegen5_acpi_dtx_probe,
|
|
+ .remove = surfacegen5_acpi_dtx_remove,
|
|
+ .driver = {
|
|
+ .name = "surfacegen5_acpi_dtx",
|
|
+ .acpi_match_table = ACPI_PTR(surfacegen5_acpi_dtx_match),
|
|
+ },
|
|
+};
|
|
+
|
|
+
|
|
+inline int surfacegen5_acpi_dtx_register(void)
|
|
+{
|
|
+ return platform_driver_register(&surfacegen5_acpi_dtx);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_dtx_unregister(void)
|
|
+{
|
|
+ platform_driver_unregister(&surfacegen5_acpi_dtx);
|
|
+}
|
|
+
|
|
+#else /* CONFIG_SURFACE_ACPI_DTX */
|
|
+
|
|
+inline int surfacegen5_acpi_dtx_register(void)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_dtx_unregister(void)
|
|
+{
|
|
+}
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_DTX */
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Surface Platform Integration Driver
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_SURFACE_ACPI_SID
|
|
+
|
|
+enum sg5_perf_mode {
|
|
+ SG5_PERF_MODE_NORMAL = 1,
|
|
+ SG5_PERF_MODE_BATTERY = 2,
|
|
+ SG5_PERF_MODE_PERF1 = 3,
|
|
+ SG5_PERF_MODE_PERF2 = 4,
|
|
+
|
|
+ __SG5_PERF_MODE__START = 1,
|
|
+ __SG5_PERF_MODE__END = 4,
|
|
+};
|
|
+
|
|
+enum sg5_param_perf_mode {
|
|
+ SG5_PARAM_PERF_MODE_AS_IS = 0,
|
|
+ SG5_PARAM_PERF_MODE_NORMAL = SG5_PERF_MODE_NORMAL,
|
|
+ SG5_PARAM_PERF_MODE_BATTERY = SG5_PERF_MODE_BATTERY,
|
|
+ SG5_PARAM_PERF_MODE_PERF1 = SG5_PERF_MODE_PERF1,
|
|
+ SG5_PARAM_PERF_MODE_PERF2 = SG5_PERF_MODE_PERF2,
|
|
+
|
|
+ __SG5_PARAM_PERF_MODE__START = 0,
|
|
+ __SG5_PARAM_PERF_MODE__END = 4,
|
|
+};
|
|
+
|
|
+struct surface_sid_drvdata {
|
|
+ struct device_link *ec_link;
|
|
+};
|
|
+
|
|
+
|
|
+static int sg5_ec_perf_mode_get(void)
|
|
+{
|
|
+ u8 result_buf[8] = { 0 };
|
|
+ int status;
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x03,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x02,
|
|
+ .snc = 0x01,
|
|
+ .cdl = 0x00,
|
|
+ .pld = NULL,
|
|
+ };
|
|
+
|
|
+ struct surfacegen5_buf result = {
|
|
+ .cap = ARRAY_SIZE(result_buf),
|
|
+ .len = 0,
|
|
+ .data = result_buf,
|
|
+ };
|
|
+
|
|
+ status = surfacegen5_ec_rqst(&rqst, &result);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (result.len != 8) {
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ return get_unaligned_le32(&result.data[0]);
|
|
+}
|
|
+
|
|
+static int sg5_ec_perf_mode_set(int perf_mode)
|
|
+{
|
|
+ u8 payload[4] = { 0 };
|
|
+
|
|
+ struct surfacegen5_rqst rqst = {
|
|
+ .tc = 0x03,
|
|
+ .iid = 0x00,
|
|
+ .cid = 0x03,
|
|
+ .snc = 0x00,
|
|
+ .cdl = ARRAY_SIZE(payload),
|
|
+ .pld = payload,
|
|
+ };
|
|
+
|
|
+ if (perf_mode < __SG5_PERF_MODE__START || perf_mode > __SG5_PERF_MODE__END) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ put_unaligned_le32(perf_mode, &rqst.pld[0]);
|
|
+ return surfacegen5_ec_rqst(&rqst, NULL);
|
|
+}
|
|
+
|
|
+
|
|
+static int param_perf_mode_set(const char *val, const struct kernel_param *kp)
|
|
+{
|
|
+ int perf_mode;
|
|
+ int status;
|
|
+
|
|
+ status = kstrtoint(val, 0, &perf_mode);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ if (perf_mode < __SG5_PARAM_PERF_MODE__START || perf_mode > __SG5_PARAM_PERF_MODE__END) {
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ return param_set_int(val, kp);
|
|
+}
|
|
+
|
|
+static const struct kernel_param_ops param_perf_mode_ops = {
|
|
+ .set = param_perf_mode_set,
|
|
+ .get = param_get_int,
|
|
+};
|
|
+
|
|
+static int param_perf_mode_init = SG5_PARAM_PERF_MODE_AS_IS;
|
|
+static int param_perf_mode_exit = SG5_PARAM_PERF_MODE_AS_IS;
|
|
+
|
|
+module_param_cb(perf_mode_init, ¶m_perf_mode_ops, ¶m_perf_mode_init, SG5_PARAM_PERM);
|
|
+module_param_cb(perf_mode_exit, ¶m_perf_mode_ops, ¶m_perf_mode_exit, SG5_PARAM_PERM);
|
|
+
|
|
+MODULE_PARM_DESC(perf_mode_init, "Performance-mode to be set on module initialization");
|
|
+MODULE_PARM_DESC(perf_mode_exit, "Performance-mode to be set on module exit");
|
|
+
|
|
+
|
|
+static ssize_t perf_mode_show(struct device *dev, struct device_attribute *attr, char *data)
|
|
+{
|
|
+ int perf_mode;
|
|
+
|
|
+ perf_mode = sg5_ec_perf_mode_get();
|
|
+ if (perf_mode < 0) {
|
|
+ dev_err(dev, "failed to get current performance mode: %d", perf_mode);
|
|
+ return -EIO;
|
|
+ }
|
|
+
|
|
+ return sprintf(data, "%d\n", perf_mode);
|
|
+}
|
|
+
|
|
+static ssize_t perf_mode_store(struct device *dev, struct device_attribute *attr,
|
|
+ const char *data, size_t count)
|
|
+{
|
|
+ int perf_mode;
|
|
+ int status;
|
|
+
|
|
+ status = kstrtoint(data, 0, &perf_mode);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ status = sg5_ec_perf_mode_set(perf_mode);
|
|
+ if (status) {
|
|
+ return status;
|
|
+ }
|
|
+
|
|
+ // TODO: Should we notify ACPI here?
|
|
+ //
|
|
+ // There is a _DSM call described as
|
|
+ // WSID._DSM: Notify DPTF on Slider State change
|
|
+ // which calls
|
|
+ // ODV3 = ToInteger (Arg3)
|
|
+ // Notify(IETM, 0x88)
|
|
+ // IETM is an INT3400 Intel Dynamic Power Performance Management
|
|
+ // device, part of the DPTF framework. From the corresponding
|
|
+ // kernel driver, it looks like event 0x88 is being ignored. Also
|
|
+ // it is currently unknown what the consequecnes of setting ODV3
|
|
+ // are.
|
|
+
|
|
+ return count;
|
|
+}
|
|
+
|
|
+const static DEVICE_ATTR_RW(perf_mode);
|
|
+
|
|
+
|
|
+static int surfacegen5_acpi_sid_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct surface_sid_drvdata *drvdata;
|
|
+ struct device_link *ec_link;
|
|
+ int status;
|
|
+
|
|
+ // link to ec
|
|
+ ec_link = surfacegen5_ec_consumer_add(&pdev->dev, DL_FLAG_PM_RUNTIME);
|
|
+ if (IS_ERR_OR_NULL(ec_link)) {
|
|
+ if (PTR_ERR(ec_link) == -ENXIO) {
|
|
+ // Defer probe if the _SSH driver has not set up the controller yet.
|
|
+ status = -EPROBE_DEFER;
|
|
+ } else {
|
|
+ status = -EFAULT;
|
|
+ }
|
|
+
|
|
+ goto err_probe_ec_link;
|
|
+ }
|
|
+
|
|
+ // set up driver data
|
|
+ drvdata = kzalloc(sizeof(struct surface_sid_drvdata), GFP_KERNEL);
|
|
+ if (!drvdata) {
|
|
+ status = -ENOMEM;
|
|
+ goto err_drvdata;
|
|
+ }
|
|
+ drvdata->ec_link = ec_link;
|
|
+ platform_set_drvdata(pdev, drvdata);
|
|
+
|
|
+ // set initial perf_mode
|
|
+ if (param_perf_mode_init != SG5_PARAM_PERF_MODE_AS_IS) {
|
|
+ status = sg5_ec_perf_mode_set(param_perf_mode_init);
|
|
+ if (status) {
|
|
+ goto err_set_perf;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ // register perf_mode attribute
|
|
+ status = sysfs_create_file(&pdev->dev.kobj, &dev_attr_perf_mode.attr);
|
|
+ if (status) {
|
|
+ goto err_sysfs;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_sysfs:
|
|
+ sg5_ec_perf_mode_set(param_perf_mode_exit);
|
|
+err_set_perf:
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ kfree(drvdata);
|
|
+err_drvdata:
|
|
+ surfacegen5_ec_consumer_remove(ec_link);
|
|
+err_probe_ec_link:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int surfacegen5_acpi_sid_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct surface_sid_drvdata *drvdata = platform_get_drvdata(pdev);
|
|
+
|
|
+ // remove perf_mode attribute
|
|
+ sysfs_remove_file(&pdev->dev.kobj, &dev_attr_perf_mode.attr);
|
|
+
|
|
+ // set exit perf_mode
|
|
+ sg5_ec_perf_mode_set(param_perf_mode_exit);
|
|
+
|
|
+ // remove consumer and clean up
|
|
+ surfacegen5_ec_consumer_remove(drvdata->ec_link);
|
|
+ platform_set_drvdata(pdev, NULL);
|
|
+ kfree(drvdata);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static const struct acpi_device_id surfacegen5_acpi_sid_match[] = {
|
|
+ { "MSHW0107", 0 }, /* Surface Book 2 */
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, surfacegen5_acpi_sid_match);
|
|
+
|
|
+struct platform_driver surfacegen5_acpi_sid = {
|
|
+ .probe = surfacegen5_acpi_sid_probe,
|
|
+ .remove = surfacegen5_acpi_sid_remove,
|
|
+ .driver = {
|
|
+ .name = "surfacegen5_acpi_sid",
|
|
+ .acpi_match_table = ACPI_PTR(surfacegen5_acpi_sid_match),
|
|
+ },
|
|
+};
|
|
+
|
|
+
|
|
+inline int surfacegen5_acpi_sid_register(void)
|
|
+{
|
|
+ return platform_driver_register(&surfacegen5_acpi_sid);
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_sid_unregister(void)
|
|
+{
|
|
+ platform_driver_unregister(&surfacegen5_acpi_sid);
|
|
+}
|
|
+
|
|
+#else /* CONFIG_SURFACE_ACPI_SID */
|
|
+
|
|
+inline int surfacegen5_acpi_sid_register(void)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+inline void surfacegen5_acpi_sid_unregister(void)
|
|
+{
|
|
+}
|
|
+
|
|
+#endif /* CONFIG_SURFACE_ACPI_SID */
|
|
+
|
|
+
|
|
+/*************************************************************************
|
|
+ * Module initialization
|
|
+ */
|
|
+
|
|
+int __init surface_acpi_init(void)
|
|
+{
|
|
+ int status;
|
|
+
|
|
+ status = surfacegen5_acpi_ssh_register();
|
|
+ if (status) {
|
|
+ goto err_ssh;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_san_register();
|
|
+ if (status) {
|
|
+ goto err_san;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_vhf_register();
|
|
+ if (status) {
|
|
+ goto err_vhf;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_dtx_register();
|
|
+ if (status) {
|
|
+ goto err_dtx;
|
|
+ }
|
|
+
|
|
+ status = surfacegen5_acpi_sid_register();
|
|
+ if (status) {
|
|
+ goto err_sid;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_sid:
|
|
+ surfacegen5_acpi_sid_unregister();
|
|
+err_dtx:
|
|
+ surfacegen5_acpi_vhf_unregister();
|
|
+err_vhf:
|
|
+ surfacegen5_acpi_san_unregister();
|
|
+err_san:
|
|
+ surfacegen5_acpi_ssh_unregister();
|
|
+err_ssh:
|
|
+ return status;
|
|
+}
|
|
+
|
|
+void __exit surface_acpi_exit(void)
|
|
+{
|
|
+ surfacegen5_acpi_sid_unregister();
|
|
+ surfacegen5_acpi_dtx_unregister();
|
|
+ surfacegen5_acpi_vhf_unregister();
|
|
+ surfacegen5_acpi_san_unregister();
|
|
+ surfacegen5_acpi_ssh_unregister();
|
|
+}
|
|
+
|
|
+module_init(surface_acpi_init)
|
|
+module_exit(surface_acpi_exit)
|
|
+
|
|
+MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
|
|
+MODULE_DESCRIPTION("ACPI/Platform Drivers for Microsoft Surface Devices");
|
|
+MODULE_LICENSE("GPL v2");
|
|
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
|
|
index a0ac16ee6575..0dd242ff24d1 100644
|
|
--- a/drivers/tty/serdev/core.c
|
|
+++ b/drivers/tty/serdev/core.c
|
|
@@ -558,8 +558,7 @@ static acpi_status acpi_serdev_register_device(struct serdev_controller *ctrl,
|
|
struct serdev_device *serdev = NULL;
|
|
int err;
|
|
|
|
- if (acpi_bus_get_status(adev) || !adev->status.present ||
|
|
- acpi_device_enumerated(adev))
|
|
+ if (acpi_bus_get_status(adev) || !adev->status.present)
|
|
return AE_OK;
|
|
|
|
serdev = serdev_device_alloc(ctrl);
|
|
@@ -582,6 +581,81 @@ static acpi_status acpi_serdev_register_device(struct serdev_controller *ctrl,
|
|
return AE_OK;
|
|
}
|
|
|
|
+struct acpi_serdev_add_device_from_resource_ctx {
|
|
+ acpi_handle ctrl_handle;
|
|
+ acpi_handle device_handle;
|
|
+ struct serdev_controller *ctrl;
|
|
+ struct acpi_device *device;
|
|
+};
|
|
+
|
|
+static acpi_status
|
|
+acpi_serdev_add_device_from_resource(struct acpi_resource *resource, void *data)
|
|
+{
|
|
+ struct acpi_serdev_add_device_from_resource_ctx* ctx = data;
|
|
+ struct acpi_resource_source *ctrl_name;
|
|
+ acpi_handle ctrl_handle;
|
|
+ acpi_status status;
|
|
+
|
|
+ if (resource->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
|
|
+ return AE_OK;
|
|
+
|
|
+ if (resource->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
|
|
+ return AE_OK;
|
|
+
|
|
+ ctrl_name = &resource->data.common_serial_bus.resource_source;
|
|
+ if (ctrl_name->string_length == 0 || !ctrl_name->string_ptr) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ status = acpi_get_handle(ctx->device_handle, ctrl_name->string_ptr,
|
|
+ &ctrl_handle);
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ return AE_OK;
|
|
+ }
|
|
+
|
|
+ if (ctrl_handle == ctx->ctrl_handle) {
|
|
+ return acpi_serdev_register_device(ctx->ctrl, ctx->device);
|
|
+ }
|
|
+
|
|
+ return AE_OK;
|
|
+}
|
|
+
|
|
+static acpi_status
|
|
+acpi_serdev_add_devices_from_resources(acpi_handle handle, u32 level,
|
|
+ void *data, void **return_value)
|
|
+{
|
|
+ struct acpi_serdev_add_device_from_resource_ctx *ctx = data;
|
|
+ acpi_status status;
|
|
+
|
|
+ ctx->device_handle = handle;
|
|
+
|
|
+ status = acpi_bus_get_device(handle, &ctx->device);
|
|
+ if (status) return AE_OK;
|
|
+
|
|
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
|
|
+ acpi_serdev_add_device_from_resource,
|
|
+ ctx);
|
|
+
|
|
+ if (status == AE_NOT_FOUND)
|
|
+ return AE_OK; // not finding _CRS is not an error
|
|
+ else
|
|
+ return status;
|
|
+}
|
|
+
|
|
+static int
|
|
+acpi_serdev_register_devices_from_resources(acpi_handle handle,
|
|
+ struct serdev_controller *ctrl)
|
|
+{
|
|
+ struct acpi_serdev_add_device_from_resource_ctx ctx = {
|
|
+ .ctrl = ctrl,
|
|
+ .ctrl_handle = handle,
|
|
+ };
|
|
+
|
|
+ return acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 128,
|
|
+ acpi_serdev_add_devices_from_resources,
|
|
+ NULL, &ctx, NULL);
|
|
+}
|
|
+
|
|
static acpi_status acpi_serdev_add_device(acpi_handle handle, u32 level,
|
|
void *data, void **return_value)
|
|
{
|
|
@@ -591,6 +665,9 @@ static acpi_status acpi_serdev_add_device(acpi_handle handle, u32 level,
|
|
if (acpi_bus_get_device(handle, &adev))
|
|
return AE_OK;
|
|
|
|
+ if (acpi_device_enumerated(adev))
|
|
+ return AE_OK;
|
|
+
|
|
return acpi_serdev_register_device(ctrl, adev);
|
|
}
|
|
|
|
@@ -608,6 +685,15 @@ static int acpi_serdev_register_devices(struct serdev_controller *ctrl)
|
|
if (ACPI_FAILURE(status))
|
|
dev_dbg(&ctrl->dev, "failed to enumerate serdev slaves\n");
|
|
|
|
+ if (!ctrl->serdev) {
|
|
+ status = acpi_serdev_register_devices_from_resources(handle, ctrl);
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ dev_dbg(&ctrl->dev,
|
|
+ "failed to register serdev slaves from resources: %x\n",
|
|
+ status);
|
|
+ }
|
|
+ }
|
|
+
|
|
if (!ctrl->serdev)
|
|
return -ENODEV;
|
|
|
|
--
|
|
2.21.0
|
|
|