[PATCH v11 09/10] platform/x86: touchscreen_dmi: Add EFI embedded firmware info support
From: Hans de Goede <hidden>
Date: 2020-01-11 14:57:52
Also in:
linux-doc, linux-efi, lkml, platform-driver-x86
Subsystem:
extensible firmware interface (efi), silead touchscreen driver, the rest, x86 platform drivers · Maintainers:
Ard Biesheuvel, Hans de Goede, Linus Torvalds, Ilpo Järvinen
Sofar we have been unable to get permission from the vendors to put the
firmware for touchscreens listed in touchscreen_dmi in linux-firmware.
Some of the tablets with such a touchscreen have a touchscreen driver, and
thus a copy of the firmware, as part of their EFI code.
This commit adds the necessary info for the new EFI embedded-firmware code
to extract these firmwares, making the touchscreen work OOTB without the
user needing to manually add the firmware.
Acked-by: Andy Shevchenko <redacted>
Acked-by: Ard Biesheuvel <redacted>
Signed-off-by: Hans de Goede <redacted>
---
Changes in v7:
- Remove adding of PROPERTY_ENTRY_BOOL("efi-embedded-firmware"), to touchscreen
props, as this is no longer necessary
Changes in v6:
- Switch from crc sums to SHA256 hashes for the firmware hashes
---
drivers/firmware/efi/embedded-firmware.c | 3 ++
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/touchscreen_dmi.c | 41 +++++++++++++++++++++++-
include/linux/efi_embedded_fw.h | 2 ++
4 files changed, 46 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/efi/embedded-firmware.c b/drivers/firmware/efi/embedded-firmware.c
index 6668ad48133f..9592c6d12840 100644
--- a/drivers/firmware/efi/embedded-firmware.c
+++ b/drivers/firmware/efi/embedded-firmware.c@@ -21,6 +21,9 @@ EXPORT_SYMBOL_GPL(efi_embedded_fw_list); static bool checked_for_fw; static const struct dmi_system_id * const embedded_fw_table[] = { +#ifdef CONFIG_TOUCHSCREEN_DMI + touchscreen_dmi_table, +#endif NULL };
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 27d5b40fb717..a65f4ffb289a 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig@@ -1253,6 +1253,7 @@ config INTEL_TURBO_MAX_3 config TOUCHSCREEN_DMI bool "DMI based touchscreen configuration info" depends on ACPI && DMI && I2C=y && TOUCHSCREEN_SILEAD + select EFI_EMBEDDED_FIRMWARE if EFI ---help--- Certain ACPI based tablets with e.g. Silead or Chipone touchscreens do not have enough data in ACPI tables for the touchscreen driver to
diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index 72205771d03d..4449e4c0b26b 100644
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c@@ -11,12 +11,15 @@ #include <linux/acpi.h> #include <linux/device.h> #include <linux/dmi.h> +#include <linux/efi_embedded_fw.h> #include <linux/i2c.h> #include <linux/notifier.h> #include <linux/property.h> #include <linux/string.h> struct ts_dmi_data { + /* The EFI embedded-fw code expects this to be the first member! */ + struct efi_embedded_fw_desc embedded_fw; const char *acpi_name; const struct property_entry *properties; };
@@ -64,6 +67,15 @@ static const struct property_entry chuwi_hi8_pro_props[] = { }; static const struct ts_dmi_data chuwi_hi8_pro_data = { + .embedded_fw = { + .name = "silead/gsl3680-chuwi-hi8-pro.fw", + .prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 }, + .length = 39864, + .sha256 = { 0xc0, 0x88, 0xc5, 0xef, 0xd1, 0x70, 0x77, 0x59, + 0x4e, 0xe9, 0xc4, 0xd8, 0x2e, 0xcd, 0xbf, 0x95, + 0x32, 0xd9, 0x03, 0x28, 0x0d, 0x48, 0x9f, 0x92, + 0x35, 0x37, 0xf6, 0x8b, 0x2a, 0xe4, 0x73, 0xff }, + }, .acpi_name = "MSSL1680:00", .properties = chuwi_hi8_pro_props, };
@@ -181,6 +193,15 @@ static const struct property_entry cube_iwork8_air_props[] = { }; static const struct ts_dmi_data cube_iwork8_air_data = { + .embedded_fw = { + .name = "silead/gsl3670-cube-iwork8-air.fw", + .prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 }, + .length = 38808, + .sha256 = { 0xff, 0x62, 0x2d, 0xd1, 0x8a, 0x78, 0x04, 0x7b, + 0x33, 0x06, 0xb0, 0x4f, 0x7f, 0x02, 0x08, 0x9c, + 0x96, 0xd4, 0x9f, 0x04, 0xe1, 0x47, 0x25, 0x25, + 0x60, 0x77, 0x41, 0x33, 0xeb, 0x12, 0x82, 0xfc }, + }, .acpi_name = "MSSL1680:00", .properties = cube_iwork8_air_props, };
@@ -390,6 +411,15 @@ static const struct property_entry onda_v80_plus_v3_props[] = { }; static const struct ts_dmi_data onda_v80_plus_v3_data = { + .embedded_fw = { + .name = "silead/gsl3676-onda-v80-plus-v3.fw", + .prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 }, + .length = 37224, + .sha256 = { 0x8f, 0xbd, 0x8f, 0x0c, 0x6b, 0xba, 0x5b, 0xf5, + 0xa3, 0xc7, 0xa3, 0xc0, 0x4f, 0xcd, 0xdf, 0x32, + 0xcc, 0xe4, 0x70, 0xd6, 0x46, 0x9c, 0xd7, 0xa7, + 0x4b, 0x82, 0x3f, 0xab, 0xc7, 0x90, 0xea, 0x23 }, + }, .acpi_name = "MSSL1680:00", .properties = onda_v80_plus_v3_props, };
@@ -456,6 +486,15 @@ static const struct property_entry pipo_w2s_props[] = { }; static const struct ts_dmi_data pipo_w2s_data = { + .embedded_fw = { + .name = "silead/gsl1680-pipo-w2s.fw", + .prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 }, + .length = 39072, + .sha256 = { 0xd0, 0x58, 0xc4, 0x7d, 0x55, 0x2d, 0x62, 0x18, + 0xd1, 0x6a, 0x71, 0x73, 0x0b, 0x3f, 0xbe, 0x60, + 0xbb, 0x45, 0x8c, 0x52, 0x27, 0xb7, 0x18, 0xf4, + 0x31, 0x00, 0x6a, 0x49, 0x76, 0xd8, 0x7c, 0xd3 }, + }, .acpi_name = "MSSL1680:00", .properties = pipo_w2s_props, };
@@ -642,7 +681,7 @@ static const struct ts_dmi_data trekstor_surftab_wintron70_data = { }; /* NOTE: Please keep this table sorted alphabetically */ -static const struct dmi_system_id touchscreen_dmi_table[] = { +const struct dmi_system_id touchscreen_dmi_table[] = { { /* Chuwi Hi8 */ .driver_data = (void *)&chuwi_hi8_data,
diff --git a/include/linux/efi_embedded_fw.h b/include/linux/efi_embedded_fw.h
index 5a8ae662911b..c4737fd07e33 100644
--- a/include/linux/efi_embedded_fw.h
+++ b/include/linux/efi_embedded_fw.h@@ -34,6 +34,8 @@ struct efi_embedded_fw_desc { u8 sha256[32]; }; +extern const struct dmi_system_id touchscreen_dmi_table[]; + int efi_get_embedded_fw(const char *name, void **dat, size_t *sz); #endif
--
2.24.1