blob: 4e10e25d3ec3a4a67ed78e8e8a2cf427956a9d63 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* This file is part of the coreboot project.
*
* Copyright 2017 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef SOC_INTEL_COMMON_BLOCK_GSPI_H
#define SOC_INTEL_COMMON_BLOCK_GSPI_H
#include <spi-generic.h>
#include <stdint.h>
/* GSPI controller structure to allow SoCs to define bus-controller mapping. */
extern const struct spi_ctrlr gspi_ctrlr;
struct gspi_cfg {
/* Bus speed in MHz. */
uint32_t speed_mhz;
/* Bus should be enabled prior to ramstage with temporary base. */
uint8_t early_init;
};
/* GSPI controller APIs. */
void gspi_early_bar_init(void);
/* SoC-callbacks */
/* Get gspi_config array from SoC. Returns NULL in case of error. */
const struct gspi_cfg *gspi_get_soc_cfg(void);
/* Get base address for early init of GSPI controllers. */
uintptr_t gspi_get_soc_early_base(void);
/*
* Map given SPI bus number to GSPI bus number.
* Return value:
* 0 = success
* -1 = error
*/
int gspi_soc_spi_to_gspi_bus(unsigned int spi_bus, unsigned int *gspi_bus);
/*
* Map given GSPI bus number to devfn.
* Return value:
* -1 = error
* otherwise, devfn(>=0) corresponding to GSPI bus number.
*/
int gspi_soc_bus_to_devfn(unsigned int gspi_bus);
/*
* SoC-provided callback for getting configuration of SPI bus. Driver provides
* weak implementation with default SPI-bus configuration.
*
* Return value:
* 0 = Success
* -1 = Error
*/
int gspi_get_soc_spi_cfg(unsigned int bus, struct spi_cfg *cfg);
#endif /* SOC_INTEL_COMMON_BLOCK_GSPI_H */
|
