835e1b86ef
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 <andy.shevchenko@gmail.com> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20200115163554.101315-10-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_EFI_EMBEDDED_FW_H
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#define _LINUX_EFI_EMBEDDED_FW_H
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#include <linux/list.h>
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#include <linux/mod_devicetable.h>
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#define EFI_EMBEDDED_FW_PREFIX_LEN 8
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/*
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* This struct and efi_embedded_fw_list are private to the efi-embedded fw
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* implementation they are in this header for use by lib/test_firmware.c only!
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*/
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struct efi_embedded_fw {
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struct list_head list;
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const char *name;
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const u8 *data;
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size_t length;
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};
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extern struct list_head efi_embedded_fw_list;
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/**
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* struct efi_embedded_fw_desc - This struct is used by the EFI embedded-fw
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* code to search for embedded firmwares.
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*
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* @name: Name to register the firmware with if found
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* @prefix: First 8 bytes of the firmware
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* @length: Length of the firmware in bytes including prefix
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* @sha256: SHA256 of the firmware
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*/
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struct efi_embedded_fw_desc {
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const char *name;
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u8 prefix[EFI_EMBEDDED_FW_PREFIX_LEN];
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u32 length;
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u8 sha256[32];
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};
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extern const struct dmi_system_id touchscreen_dmi_table[];
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int efi_get_embedded_fw(const char *name, const u8 **dat, size_t *sz);
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#endif
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