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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Common SPI flash Interface
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*/
#ifndef _SPI_FLASH_H_
#define _SPI_FLASH_H_
#include <dm.h> /* Because we dereference struct udevice here */
#include <linux/types.h>
#include <linux/mtd/spi-nor.h>
/* by default ENV use the same parameters than SF command */
#ifndef CONFIG_ENV_SPI_BUS
# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
#endif
#ifndef CONFIG_ENV_SPI_CS
# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
#endif
#ifndef CONFIG_ENV_SPI_MAX_HZ
# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
#endif
#ifndef CONFIG_ENV_SPI_MODE
# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
#endif
struct spi_slave;
struct dm_spi_flash_ops {
int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
int (*write)(struct udevice *dev, u32 offset, size_t len,
const void *buf);
int (*erase)(struct udevice *dev, u32 offset, size_t len);
/**
* get_sw_write_prot() - Check state of software write-protect feature
*
* SPI flash chips can lock a region of the flash defined by a
* 'protected area'. This function checks if this protected area is
* defined.
*
* @dev: SPI flash device
* @return 0 if no region is write-protected, 1 if a region is
* write-protected, -ENOSYS if the driver does not implement this,
* other -ve value on error
*/
int (*get_sw_write_prot)(struct udevice *dev);
};
/* Access the serial operations for a device */
#define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
#ifdef CONFIG_DM_SPI_FLASH
/**
* spi_flash_read_dm() - Read data from SPI flash
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to read from
* @len: Number of bytes to read
* @buf: Buffer to put the data that is read
* @return 0 if OK, -ve on error
*/
int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
/**
* spi_flash_write_dm() - Write data to SPI flash
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to write to
* @len: Number of bytes to write
* @buf: Buffer containing bytes to write
* @return 0 if OK, -ve on error
*/
int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
const void *buf);
/**
* spi_flash_erase_dm() - Erase blocks of the SPI flash
*
* Note that @len must be a muiltiple of the flash sector size.
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to start erasing
* @len: Number of bytes to erase
* @return 0 if OK, -ve on error
*/
int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
/**
* spl_flash_get_sw_write_prot() - Check state of software write-protect feature
*
* SPI flash chips can lock a region of the flash defined by a
* 'protected area'. This function checks if this protected area is
* defined.
*
* @dev: SPI flash device
* @return 0 if no region is write-protected, 1 if a region is
* write-protected, -ENOSYS if the driver does not implement this,
* other -ve value on error
*/
int spl_flash_get_sw_write_prot(struct udevice *dev);
int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode,
struct udevice **devp);
/* Compatibility function - this is the old U-Boot API */
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode);
/* Compatibility function - this is the old U-Boot API */
void spi_flash_free(struct spi_flash *flash);
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
size_t len, void *buf)
{
return spi_flash_read_dm(flash->dev, offset, len, buf);
}
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
return spi_flash_write_dm(flash->dev, offset, len, buf);
}
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
size_t len)
{
return spi_flash_erase_dm(flash->dev, offset, len);
}
struct sandbox_state;
int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
struct udevice *bus, ofnode node, const char *spec);
void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
#else
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode);
void spi_flash_free(struct spi_flash *flash);
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
size_t len, void *buf)
{
struct mtd_info *mtd = &flash->mtd;
size_t retlen;
return mtd->_read(mtd, offset, len, &retlen, buf);
}
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
struct mtd_info *mtd = &flash->mtd;
size_t retlen;
return mtd->_write(mtd, offset, len, &retlen, buf);
}
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
size_t len)
{
struct mtd_info *mtd = &flash->mtd;
struct erase_info instr;
if (offset % mtd->erasesize || len % mtd->erasesize) {
printf("SF: Erase offset/length not multiple of erase size\n");
return -EINVAL;
}
memset(&instr, 0, sizeof(instr));
instr.addr = offset;
instr.len = len;
return mtd->_erase(mtd, &instr);
}
#endif
static inline int spi_flash_protect(struct spi_flash *flash, u32 ofs, u32 len,
bool prot)
{
if (!flash->flash_lock || !flash->flash_unlock)
return -EOPNOTSUPP;
if (prot)
return flash->flash_lock(flash, ofs, len);
else
return flash->flash_unlock(flash, ofs, len);
}
#endif /* _SPI_FLASH_H_ */
|
