mirror of https://github.com/acidanthera/audk.git
288 lines
11 KiB
C
288 lines
11 KiB
C
/** @file
|
|
This file defines the SPI Configuration Protocol.
|
|
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Revision Reference:
|
|
This Protocol was introduced in UEFI PI Specification 1.6.
|
|
|
|
**/
|
|
|
|
#ifndef __SPI_CONFIGURATION_PROTOCOL_H__
|
|
#define __SPI_CONFIGURATION_PROTOCOL_H__
|
|
|
|
///
|
|
/// Global ID for the SPI Configuration Protocol
|
|
///
|
|
#define EFI_SPI_CONFIGURATION_GUID \
|
|
{ 0x85a6d3e6, 0xb65b, 0x4afc, \
|
|
{ 0xb3, 0x8f, 0xc6, 0xd5, 0x4a, 0xf6, 0xdd, 0xc8 }}
|
|
|
|
///
|
|
/// Macros to easily specify frequencies in hertz, kilohertz and megahertz.
|
|
///
|
|
#define Hz(Frequency) (Frequency)
|
|
#define KHz(Frequency) (1000 * Hz (Frequency))
|
|
#define MHz(Frequency) (1000 * KHz (Frequency))
|
|
|
|
typedef struct _EFI_SPI_PERIPHERAL EFI_SPI_PERIPHERAL;
|
|
|
|
/**
|
|
Manipulate the chip select for a SPI device.
|
|
|
|
This routine must be called at or below TPL_NOTIFY.
|
|
Update the value of the chip select line for a SPI peripheral.
|
|
The SPI bus layer calls this routine either in the board layer or in the SPI
|
|
controller to manipulate the chip select pin at the start and end of a SPI
|
|
transaction.
|
|
|
|
@param[in] SpiPeripheral The address of an EFI_SPI_PERIPHERAL data structure
|
|
describing the SPI peripheral whose chip select pin
|
|
is to be manipulated. The routine may access the
|
|
ChipSelectParameter field to gain sufficient
|
|
context to complete the operation.
|
|
@param[in] PinValue The value to be applied to the chip select line of
|
|
the SPI peripheral.
|
|
|
|
@retval EFI_SUCCESS The chip select was set successfully
|
|
@retval EFI_NOT_READY Support for the chip select is not properly
|
|
initialized
|
|
@retval EFI_INVALID_PARAMETER The SpiPeripheral->ChipSelectParameter value
|
|
is invalid
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_SPI_CHIP_SELECT) (
|
|
IN CONST EFI_SPI_PERIPHERAL *SpiPeripheral,
|
|
IN BOOLEAN PinValue
|
|
);
|
|
|
|
/**
|
|
Set up the clock generator to produce the correct clock frequency, phase and
|
|
polarity for a SPI chip.
|
|
|
|
This routine must be called at or below TPL_NOTIFY.
|
|
This routine updates the clock generator to generate the correct frequency
|
|
and polarity for the SPI clock.
|
|
|
|
@param[in] SpiPeripheral Pointer to a EFI_SPI_PERIPHERAL data structure from
|
|
which the routine can access the ClockParameter,
|
|
ClockPhase and ClockPolarity fields. The routine
|
|
also has access to the names for the SPI bus and
|
|
chip which can be used during debugging.
|
|
@param[in] ClockHz Pointer to the requested clock frequency. The clock
|
|
generator will choose a supported clock frequency
|
|
which is less then or equal to this value.
|
|
Specify zero to turn the clock generator off.
|
|
The actual clock frequency supported by the clock
|
|
generator will be returned.
|
|
|
|
@retval EFI_SUCCESS The clock was set up successfully
|
|
@retval EFI_UNSUPPORTED The SPI controller was not able to support the
|
|
frequency requested by CLockHz
|
|
|
|
**/
|
|
typedef EFI_STATUS
|
|
(EFIAPI *EFI_SPI_CLOCK) (
|
|
IN CONST EFI_SPI_PERIPHERAL *SpiPeripheral,
|
|
IN UINT32 *ClockHz
|
|
);
|
|
|
|
///
|
|
/// The EFI_SPI_PART data structure provides a description of a SPI part which
|
|
/// is independent of the use on the board. This data is available directly
|
|
/// from the part's datasheet and may be provided by the vendor.
|
|
///
|
|
typedef struct _EFI_SPI_PART {
|
|
///
|
|
/// A Unicode string specifying the SPI chip vendor.
|
|
///
|
|
CONST CHAR16 *Vendor;
|
|
|
|
///
|
|
/// A Unicode string specifying the SPI chip part number.
|
|
///
|
|
CONST CHAR16 *PartNumber;
|
|
|
|
///
|
|
/// The minimum SPI bus clock frequency used to access this chip. This value
|
|
/// may be specified in the chip's datasheet. If not, use the value of zero.
|
|
///
|
|
UINT32 MinClockHz;
|
|
|
|
///
|
|
/// The maximum SPI bus clock frequency used to access this chip. This value
|
|
/// is found in the chip's datasheet.
|
|
///
|
|
UINT32 MaxClockHz;
|
|
|
|
///
|
|
/// Specify the polarity of the chip select pin. This value can be found in
|
|
/// the SPI chip's datasheet. Specify TRUE when a one asserts the chip select
|
|
///and FALSE when a zero asserts the chip select.
|
|
///
|
|
BOOLEAN ChipSelectPolarity;
|
|
} EFI_SPI_PART;
|
|
|
|
///
|
|
/// The EFI_SPI_BUS data structure provides the connection details between the
|
|
/// physical SPI bus and the EFI_SPI_HC_PROTOCOL instance which controls that
|
|
/// SPI bus. This data structure also describes the details of how the clock is
|
|
/// generated for that SPI bus. Finally this data structure provides the list
|
|
/// of physical SPI devices which are attached to the SPI bus.
|
|
///
|
|
typedef struct _EFI_SPI_BUS {
|
|
///
|
|
/// A Unicode string describing the SPI bus
|
|
///
|
|
CONST CHAR16 *FriendlyName;
|
|
|
|
///
|
|
/// Address of the first EFI_SPI_PERIPHERAL data structure connected to this
|
|
/// bus. Specify NULL if there are no SPI peripherals connected to this bus.
|
|
///
|
|
CONST EFI_SPI_PERIPHERAL *Peripherallist;
|
|
|
|
///
|
|
/// Address of an EFI_DEVICE_PATH_PROTOCOL data structure which uniquely
|
|
/// describes the SPI controller.
|
|
///
|
|
CONST EFI_DEVICE_PATH_PROTOCOL *ControllerPath;
|
|
|
|
///
|
|
/// Address of the routine which controls the clock used by the SPI bus for
|
|
/// this SPI peripheral. The SPI host co ntroller's clock routine is called
|
|
/// when this value is set to NULL.
|
|
///
|
|
EFI_SPI_CLOCK Clock;
|
|
|
|
///
|
|
/// Address of a data structure containing the additional values which
|
|
/// describe the necessary control for the clock. When Clock is NULL,
|
|
/// the declaration for this data structure is provided by the vendor of the
|
|
/// host's SPI controller driver. When Clock is not NULL, the declaration for
|
|
/// this data structure is provided by the board layer.
|
|
///
|
|
VOID *ClockParameter;
|
|
} EFI_SPI_BUS;
|
|
|
|
///
|
|
/// The EFI_SPI_PERIPHERAL data structure describes how a specific block of
|
|
/// logic which is connected to the SPI bus. This data structure also selects
|
|
/// which upper level driver is used to manipulate this SPI device.
|
|
/// The SpiPeripheraLDriverGuid is available from the vendor of the SPI
|
|
/// peripheral driver.
|
|
///
|
|
struct _EFI_SPI_PERIPHERAL {
|
|
///
|
|
/// Address of the next EFI_SPI_PERIPHERAL data structure. Specify NULL if
|
|
/// the current data structure is the last one on the SPI bus.
|
|
///
|
|
CONST EFI_SPI_PERIPHERAL *NextSpiPeripheral;
|
|
|
|
///
|
|
/// A unicode string describing the function of the SPI part.
|
|
///
|
|
CONST CHAR16 *FriendlyName;
|
|
|
|
///
|
|
/// Address of a GUID provided by the vendor of the SPI peripheral driver.
|
|
/// Instead of using a " EFI_SPI_IO_PROTOCOL" GUID, the SPI bus driver uses
|
|
/// this GUID to identify an EFI_SPI_IO_PROTOCOL data structure and to
|
|
/// provide the connection points for the SPI peripheral drivers.
|
|
/// This reduces the comparison logic in the SPI peripheral driver's
|
|
/// Supported routine.
|
|
///
|
|
CONST GUID *SpiPeripheralDriverGuid;
|
|
|
|
///
|
|
/// The address of an EFI_SPI_PART data structure which describes this chip.
|
|
///
|
|
CONST EFI_SPI_PART *SpiPart;
|
|
|
|
///
|
|
/// The maximum clock frequency is specified in the EFI_SPI_P ART. When this
|
|
/// this value is non-zero and less than the value in the EFI_SPI_PART then
|
|
/// this value is used for the maximum clock frequency for the SPI part.
|
|
///
|
|
UINT32 MaxClockHz;
|
|
|
|
///
|
|
/// Specify the idle value of the clock as found in the datasheet.
|
|
/// Use zero (0) if the clock'S idle value is low or one (1) if the the
|
|
/// clock's idle value is high.
|
|
///
|
|
BOOLEAN ClockPolarity;
|
|
|
|
///
|
|
/// Specify the clock delay after chip select. Specify zero (0) to delay an
|
|
/// entire clock cycle or one (1) to delay only half a clock cycle.
|
|
///
|
|
BOOLEAN ClockPhase;
|
|
|
|
///
|
|
/// SPI peripheral attributes, select zero or more of:
|
|
/// * SPI_PART_SUPPORTS_2_B1T_DATA_BUS_W1DTH - The SPI peripheral is wired to
|
|
/// support a 2-bit data bus
|
|
/// * SPI_PART_SUPPORTS_4_B1T_DATA_BUS_W1DTH - The SPI peripheral is wired to
|
|
/// support a 4-bit data bus
|
|
///
|
|
UINT32 Attributes;
|
|
|
|
///
|
|
/// Address of a vendor specific data structure containing additional board
|
|
/// configuration details related to the SPI chip. The SPI peripheral layer
|
|
/// uses this data structure when configuring the chip.
|
|
///
|
|
CONST VOID *ConfigurationData;
|
|
|
|
///
|
|
/// The address of an EFI_SPI_BUS data structure which describes the SPI bus
|
|
/// to which this chip is connected.
|
|
///
|
|
CONST EFI_SPI_BUS *SpiBus;
|
|
|
|
///
|
|
/// Address of the routine which controls the chip select pin for this SPI
|
|
/// peripheral. Call the SPI host controller's chip select routine when this
|
|
/// value is set to NULL.
|
|
///
|
|
EFI_SPI_CHIP_SELECT ChipSelect;
|
|
|
|
///
|
|
/// Address of a data structure containing the additional values which
|
|
/// describe the necessary control for the chip select. When ChipSelect is
|
|
/// NULL, the declaration for this data structure is provided by the vendor
|
|
/// of the host's SPI controller driver. The vendor's documentation specifies
|
|
/// the necessary values to use for the chip select pin selection and
|
|
/// control. When Chipselect is not NULL, the declaration for this data
|
|
/// structure is provided by the board layer.
|
|
///
|
|
VOID *ChipSelectParameter;
|
|
};
|
|
|
|
///
|
|
/// Describe the details of the board's SPI busses to the SPI driver stack.
|
|
/// The board layer uses the EFI_SPI_CONFIGURATION_PROTOCOL to expose the data
|
|
/// tables which describe the board's SPI busses, The SPI bus layer uses these
|
|
/// tables to configure the clock, chip select and manage the SPI transactions
|
|
/// on the SPI controllers.
|
|
///
|
|
typedef struct _EFI_SPI_CONFIGURATION_PROTOCOL {
|
|
///
|
|
/// The number of SPI busses on the board.
|
|
///
|
|
UINT32 BusCount;
|
|
|
|
///
|
|
/// The address of an array of EFI_SPI_BUS data structure addresses.
|
|
///
|
|
CONST EFI_SPI_BUS *CONST *CONST Buslist;
|
|
} EFI_SPI_CONFIGURATION_PROTOCOL;
|
|
|
|
extern EFI_GUID gEfiSpiConfigurationProtocolGuid;
|
|
|
|
#endif // __SPI_CONFIGURATION_PROTOCOL_H__
|