spi_flash.h
5.72 KB
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
197
198
199
/*
* Common SPI flash Interface
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
#ifndef _SPI_FLASH_H_
#define _SPI_FLASH_H_
#include <dm.h> /* Because we dereference struct udevice here */
#include <linux/types.h>
#ifndef CONFIG_SF_DEFAULT_SPEED
# define CONFIG_SF_DEFAULT_SPEED 1000000
#endif
#ifndef CONFIG_SF_DEFAULT_MODE
# define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
#endif
#ifndef CONFIG_SF_DEFAULT_CS
# define CONFIG_SF_DEFAULT_CS 0
#endif
#ifndef CONFIG_SF_DEFAULT_BUS
# define CONFIG_SF_DEFAULT_BUS 0
#endif
struct spi_slave;
/**
* struct spi_flash - SPI flash structure
*
* @spi: SPI slave
* @name: Name of SPI flash
* @dual_flash: Indicates dual flash memories - dual stacked, parallel
* @shift: Flash shift useful in dual parallel
* @size: Total flash size
* @page_size: Write (page) size
* @sector_size: Sector size
* @erase_size: Erase size
* @bank_read_cmd: Bank read cmd
* @bank_write_cmd: Bank write cmd
* @bank_curr: Current flash bank
* @poll_cmd: Poll cmd - for flash erase/program
* @erase_cmd: Erase cmd 4K, 32K, 64K
* @read_cmd: Read cmd - Array Fast, Extn read and quad read.
* @write_cmd: Write cmd - page and quad program.
* @dummy_byte: Dummy cycles for read operation.
* @memory_map: Address of read-only SPI flash access
* @read: Flash read ops: Read len bytes at offset into buf
* Supported cmds: Fast Array Read
* @write: Flash write ops: Write len bytes from buf into offset
* Supported cmds: Page Program
* @erase: Flash erase ops: Erase len bytes from offset
* Supported cmds: Sector erase 4K, 32K, 64K
* return 0 - Success, 1 - Failure
*/
struct spi_flash {
#ifdef CONFIG_DM_SPI_FLASH
struct spi_slave *spi;
struct udevice *dev;
#else
struct spi_slave *spi;
#endif
const char *name;
u8 dual_flash;
u8 shift;
u32 size;
u32 page_size;
u32 sector_size;
u32 erase_size;
#ifdef CONFIG_SPI_FLASH_BAR
u8 bank_read_cmd;
u8 bank_write_cmd;
u8 bank_curr;
#endif
u8 poll_cmd;
u8 erase_cmd;
u8 read_cmd;
u8 write_cmd;
u8 dummy_byte;
void *memory_map;
#ifndef CONFIG_DM_SPI_FLASH
/*
* These are not strictly needed for driver model, but keep them here
* whilt the transition is in progress.
*
* Normally each driver would provide its own operations, but for
* SPI flash most chips use the same algorithms. One approach is
* to create a 'common' SPI flash device which knows how to talk
* to most devices, and then allow other drivers to be used instead
* if requird, perhaps with a way of scanning through the list to
* find the driver that matches the device.
*/
int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
int (*write)(struct spi_flash *flash, u32 offset, size_t len,
const void *buf);
int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
#endif
};
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);
};
/* 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
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);
int spi_flash_remove(struct udevice *flash);
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
size_t len, void *buf)
{
return sf_get_ops(flash->dev)->read(flash->dev, offset, len, buf);
}
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
return sf_get_ops(flash->dev)->write(flash->dev, offset, len, buf);
}
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
size_t len)
{
return sf_get_ops(flash->dev)->erase(flash->dev, offset, len);
}
struct sandbox_state;
int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
struct udevice *bus, int of_offset, 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);
/**
* Set up a new SPI flash from an fdt node
*
* @param blob Device tree blob
* @param slave_node Pointer to this SPI slave node in the device tree
* @param spi_node Cached pointer to the SPI interface this node belongs
* to
* @return 0 if ok, -1 on error
*/
struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
int spi_node);
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 flash->read(flash, offset, len, buf);
}
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
return flash->write(flash, offset, len, buf);
}
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
size_t len)
{
return flash->erase(flash, offset, len);
}
#endif
void spi_boot(void) __noreturn;
void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);
#endif /* _SPI_FLASH_H_ */