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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
// SPDX-License-Identifier: GPL-2.0+
/*
* SPI flash probing
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include "sf_internal.h"
/**
* spi_flash_probe_slave() - Probe for a SPI flash device on a bus
*
* @flashp: Pointer to place to put flash info, which may be NULL if the
* space should be allocated
*/
static int spi_flash_probe_slave(struct spi_flash *flash)
{
struct spi_slave *spi = flash->spi;
int ret;
/* Setup spi_slave */
if (!spi) {
printf("SF: Failed to set up slave\n");
return -ENODEV;
}
/* Claim spi bus */
ret = spi_claim_bus(spi);
if (ret) {
debug("SF: Failed to claim SPI bus: %d\n", ret);
return ret;
}
ret = spi_flash_scan(flash);
if (ret)
goto err_read_id;
#ifdef CONFIG_SPI_FLASH_MTD
ret = spi_flash_mtd_register(flash);
#endif
err_read_id:
spi_release_bus(spi);
return ret;
}
#ifndef CONFIG_DM_SPI_FLASH
struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode)
{
struct spi_slave *bus;
struct spi_flash *flash;
bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
if (!bus)
return NULL;
/* Allocate space if needed (not used by sf-uclass */
flash = calloc(1, sizeof(*flash));
if (!flash) {
debug("SF: Failed to allocate spi_flash\n");
return NULL;
}
flash->spi = bus;
if (spi_flash_probe_slave(flash)) {
spi_free_slave(bus);
free(flash);
return NULL;
}
return flash;
}
void spi_flash_free(struct spi_flash *flash)
{
#ifdef CONFIG_SPI_FLASH_MTD
spi_flash_mtd_unregister();
#endif
spi_free_slave(flash->spi);
free(flash);
}
#else /* defined CONFIG_DM_SPI_FLASH */
static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
void *buf)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
return spi_flash_cmd_read_ops(flash, offset, len, buf);
}
static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
const void *buf)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
#if defined(CONFIG_SPI_FLASH_SST)
if (flash->flags & SNOR_F_SST_WR) {
if (flash->spi->mode & SPI_TX_BYTE)
return sst_write_bp(flash, offset, len, buf);
else
return sst_write_wp(flash, offset, len, buf);
}
#endif
return spi_flash_cmd_write_ops(flash, offset, len, buf);
}
static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
return spi_flash_cmd_erase_ops(flash, offset, len);
}
static int spi_flash_std_probe(struct udevice *dev)
{
struct spi_slave *slave = dev_get_parent_priv(dev);
struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
struct spi_flash *flash;
flash = dev_get_uclass_priv(dev);
flash->dev = dev;
flash->spi = slave;
debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
return spi_flash_probe_slave(flash);
}
static const struct dm_spi_flash_ops spi_flash_std_ops = {
.read = spi_flash_std_read,
.write = spi_flash_std_write,
.erase = spi_flash_std_erase,
};
static const struct udevice_id spi_flash_std_ids[] = {
{ .compatible = "spi-flash" },
{ }
};
U_BOOT_DRIVER(spi_flash_std) = {
.name = "spi_flash_std",
.id = UCLASS_SPI_FLASH,
.of_match = spi_flash_std_ids,
.probe = spi_flash_std_probe,
.priv_auto_alloc_size = sizeof(struct spi_flash),
.ops = &spi_flash_std_ops,
};
#endif /* CONFIG_DM_SPI_FLASH */
|
