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150efd30c3
[ Upstream commit144345a4a8] If CONFIG_RASPBERRYPI_FIRMWARE=n: drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_polarity’: drivers/gpio/gpio-raspberrypi-exp.c:71: warning: ‘get.polarity’ is used uninitialized in this function drivers/gpio/gpio-raspberrypi-exp.c: In function ‘rpi_exp_gpio_get_direction’: drivers/gpio/gpio-raspberrypi-exp.c:150: warning: ‘get.direction’ is used uninitialized in this function The dummy firmware interface functions return 0, which means success, causing subsequent code to make use of the never initialized output parameter. Fix this by making the dummy functions return an error code (-ENOSYS) instead. Note that this assumes the firmware always fills in the requested data in the CONFIG_RASPBERRYPI_FIRMWARE=y case. Fixes:d45f1a563b("staging: vc04_services: fix up rpi firmware functions") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
143 lines
6.4 KiB
C
143 lines
6.4 KiB
C
/*
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* Copyright © 2015 Broadcom
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __SOC_RASPBERRY_FIRMWARE_H__
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#define __SOC_RASPBERRY_FIRMWARE_H__
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#include <linux/types.h>
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#include <linux/of_device.h>
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struct rpi_firmware;
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enum rpi_firmware_property_status {
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RPI_FIRMWARE_STATUS_REQUEST = 0,
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RPI_FIRMWARE_STATUS_SUCCESS = 0x80000000,
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RPI_FIRMWARE_STATUS_ERROR = 0x80000001,
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};
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/**
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* struct rpi_firmware_property_tag_header - Firmware property tag header
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* @tag: One of enum_mbox_property_tag.
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* @buf_size: The number of bytes in the value buffer following this
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* struct.
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* @req_resp_size: On submit, the length of the request (though it doesn't
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* appear to be currently used by the firmware). On return,
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* the length of the response (always 4 byte aligned), with
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* the low bit set.
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*/
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struct rpi_firmware_property_tag_header {
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u32 tag;
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u32 buf_size;
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u32 req_resp_size;
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};
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enum rpi_firmware_property_tag {
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RPI_FIRMWARE_PROPERTY_END = 0,
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RPI_FIRMWARE_GET_FIRMWARE_REVISION = 0x00000001,
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RPI_FIRMWARE_SET_CURSOR_INFO = 0x00008010,
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RPI_FIRMWARE_SET_CURSOR_STATE = 0x00008011,
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RPI_FIRMWARE_GET_BOARD_MODEL = 0x00010001,
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RPI_FIRMWARE_GET_BOARD_REVISION = 0x00010002,
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RPI_FIRMWARE_GET_BOARD_MAC_ADDRESS = 0x00010003,
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RPI_FIRMWARE_GET_BOARD_SERIAL = 0x00010004,
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RPI_FIRMWARE_GET_ARM_MEMORY = 0x00010005,
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RPI_FIRMWARE_GET_VC_MEMORY = 0x00010006,
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RPI_FIRMWARE_GET_CLOCKS = 0x00010007,
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RPI_FIRMWARE_GET_POWER_STATE = 0x00020001,
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RPI_FIRMWARE_GET_TIMING = 0x00020002,
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RPI_FIRMWARE_SET_POWER_STATE = 0x00028001,
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RPI_FIRMWARE_GET_CLOCK_STATE = 0x00030001,
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RPI_FIRMWARE_GET_CLOCK_RATE = 0x00030002,
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RPI_FIRMWARE_GET_VOLTAGE = 0x00030003,
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RPI_FIRMWARE_GET_MAX_CLOCK_RATE = 0x00030004,
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RPI_FIRMWARE_GET_MAX_VOLTAGE = 0x00030005,
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RPI_FIRMWARE_GET_TEMPERATURE = 0x00030006,
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RPI_FIRMWARE_GET_MIN_CLOCK_RATE = 0x00030007,
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RPI_FIRMWARE_GET_MIN_VOLTAGE = 0x00030008,
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RPI_FIRMWARE_GET_TURBO = 0x00030009,
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RPI_FIRMWARE_GET_MAX_TEMPERATURE = 0x0003000a,
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RPI_FIRMWARE_ALLOCATE_MEMORY = 0x0003000c,
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RPI_FIRMWARE_LOCK_MEMORY = 0x0003000d,
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RPI_FIRMWARE_UNLOCK_MEMORY = 0x0003000e,
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RPI_FIRMWARE_RELEASE_MEMORY = 0x0003000f,
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RPI_FIRMWARE_EXECUTE_CODE = 0x00030010,
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RPI_FIRMWARE_EXECUTE_QPU = 0x00030011,
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RPI_FIRMWARE_SET_ENABLE_QPU = 0x00030012,
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RPI_FIRMWARE_GET_DISPMANX_RESOURCE_MEM_HANDLE = 0x00030014,
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RPI_FIRMWARE_GET_EDID_BLOCK = 0x00030020,
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RPI_FIRMWARE_GET_DOMAIN_STATE = 0x00030030,
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RPI_FIRMWARE_SET_CLOCK_STATE = 0x00038001,
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RPI_FIRMWARE_SET_CLOCK_RATE = 0x00038002,
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RPI_FIRMWARE_SET_VOLTAGE = 0x00038003,
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RPI_FIRMWARE_SET_TURBO = 0x00038009,
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RPI_FIRMWARE_SET_DOMAIN_STATE = 0x00038030,
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/* Dispmanx TAGS */
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RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE = 0x00040001,
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RPI_FIRMWARE_FRAMEBUFFER_BLANK = 0x00040002,
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RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT = 0x00040003,
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RPI_FIRMWARE_FRAMEBUFFER_GET_VIRTUAL_WIDTH_HEIGHT = 0x00040004,
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RPI_FIRMWARE_FRAMEBUFFER_GET_DEPTH = 0x00040005,
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RPI_FIRMWARE_FRAMEBUFFER_GET_PIXEL_ORDER = 0x00040006,
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RPI_FIRMWARE_FRAMEBUFFER_GET_ALPHA_MODE = 0x00040007,
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RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH = 0x00040008,
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RPI_FIRMWARE_FRAMEBUFFER_GET_VIRTUAL_OFFSET = 0x00040009,
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RPI_FIRMWARE_FRAMEBUFFER_GET_OVERSCAN = 0x0004000a,
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RPI_FIRMWARE_FRAMEBUFFER_GET_PALETTE = 0x0004000b,
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RPI_FIRMWARE_FRAMEBUFFER_RELEASE = 0x00048001,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_PHYSICAL_WIDTH_HEIGHT = 0x00044003,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_VIRTUAL_WIDTH_HEIGHT = 0x00044004,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_DEPTH = 0x00044005,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_PIXEL_ORDER = 0x00044006,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_ALPHA_MODE = 0x00044007,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_VIRTUAL_OFFSET = 0x00044009,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_OVERSCAN = 0x0004400a,
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RPI_FIRMWARE_FRAMEBUFFER_TEST_PALETTE = 0x0004400b,
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RPI_FIRMWARE_FRAMEBUFFER_SET_PHYSICAL_WIDTH_HEIGHT = 0x00048003,
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RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_WIDTH_HEIGHT = 0x00048004,
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RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH = 0x00048005,
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RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER = 0x00048006,
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RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE = 0x00048007,
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RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET = 0x00048009,
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RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN = 0x0004800a,
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RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE = 0x0004800b,
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RPI_FIRMWARE_VCHIQ_INIT = 0x00048010,
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RPI_FIRMWARE_GET_COMMAND_LINE = 0x00050001,
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RPI_FIRMWARE_GET_DMA_CHANNELS = 0x00060001,
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};
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#if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
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int rpi_firmware_property(struct rpi_firmware *fw,
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u32 tag, void *data, size_t len);
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int rpi_firmware_property_list(struct rpi_firmware *fw,
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void *data, size_t tag_size);
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struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
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#else
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static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
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void *data, size_t len)
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{
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return -ENOSYS;
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}
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static inline int rpi_firmware_property_list(struct rpi_firmware *fw,
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void *data, size_t tag_size)
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{
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return -ENOSYS;
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}
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static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
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{
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return NULL;
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}
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#endif
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#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */
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