]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_sf.c
2 * Command for accessing SPI flash.
4 * Copyright (C) 2008 Atmel Corporation
11 #ifndef CONFIG_SF_DEFAULT_SPEED
12 # define CONFIG_SF_DEFAULT_SPEED 1000000
14 #ifndef CONFIG_SF_DEFAULT_MODE
15 # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
18 static struct spi_flash
*flash
;
20 static int do_spi_flash_probe(int argc
, char *argv
[])
24 unsigned int speed
= CONFIG_SF_DEFAULT_SPEED
;
25 unsigned int mode
= CONFIG_SF_DEFAULT_MODE
;
27 struct spi_flash
*new;
32 cs
= simple_strtoul(argv
[1], &endp
, 0);
33 if (*argv
[1] == 0 || (*endp
!= 0 && *endp
!= ':'))
40 cs
= simple_strtoul(endp
+ 1, &endp
, 0);
46 speed
= simple_strtoul(argv
[2], &endp
, 0);
47 if (*argv
[2] == 0 || *endp
!= 0)
51 mode
= simple_strtoul(argv
[3], &endp
, 0);
52 if (*argv
[3] == 0 || *endp
!= 0)
56 new = spi_flash_probe(bus
, cs
, speed
, mode
);
58 printf("Failed to initialize SPI flash at %u:%u\n", bus
, cs
);
63 spi_flash_free(flash
);
66 printf("%u KiB %s at %u:%u is now current device\n",
67 flash
->size
>> 10, flash
->name
, bus
, cs
);
72 puts("Usage: sf probe [bus:]cs [hz] [mode]\n");
76 static int do_spi_flash_read_write(int argc
, char *argv
[])
88 addr
= simple_strtoul(argv
[1], &endp
, 16);
89 if (*argv
[1] == 0 || *endp
!= 0)
91 offset
= simple_strtoul(argv
[2], &endp
, 16);
92 if (*argv
[2] == 0 || *endp
!= 0)
94 len
= simple_strtoul(argv
[3], &endp
, 16);
95 if (*argv
[3] == 0 || *endp
!= 0)
98 buf
= map_physmem(addr
, len
, MAP_WRBACK
);
100 puts("Failed to map physical memory\n");
104 if (strcmp(argv
[0], "read") == 0)
105 ret
= spi_flash_read(flash
, offset
, len
, buf
);
107 ret
= spi_flash_write(flash
, offset
, len
, buf
);
109 unmap_physmem(buf
, len
);
112 printf("SPI flash %s failed\n", argv
[0]);
119 printf("Usage: sf %s addr offset len\n", argv
[0]);
123 static int do_spi_flash_erase(int argc
, char *argv
[])
125 unsigned long offset
;
133 offset
= simple_strtoul(argv
[1], &endp
, 16);
134 if (*argv
[1] == 0 || *endp
!= 0)
136 len
= simple_strtoul(argv
[2], &endp
, 16);
137 if (*argv
[2] == 0 || *endp
!= 0)
140 ret
= spi_flash_erase(flash
, offset
, len
);
142 printf("SPI flash %s failed\n", argv
[0]);
149 puts("Usage: sf erase offset len\n");
153 static int do_spi_flash(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
157 /* need at least two arguments */
163 if (strcmp(cmd
, "probe") == 0)
164 return do_spi_flash_probe(argc
- 1, argv
+ 1);
166 /* The remaining commands require a selected device */
168 puts("No SPI flash selected. Please run `sf probe'\n");
172 if (strcmp(cmd
, "read") == 0 || strcmp(cmd
, "write") == 0)
173 return do_spi_flash_read_write(argc
- 1, argv
+ 1);
174 if (strcmp(cmd
, "erase") == 0)
175 return do_spi_flash_erase(argc
- 1, argv
+ 1);
183 sf
, 5, 1, do_spi_flash
,
184 "SPI flash sub-system",
185 "probe [bus:]cs [hz] [mode] - init flash device on given SPI bus\n"
187 "sf read addr offset len - read `len' bytes starting at\n"
188 " `offset' to memory at `addr'\n"
189 "sf write addr offset len - write `len' bytes from memory\n"
190 " at `addr' to flash at `offset'\n"
191 "sf erase offset len - erase `len' bytes from `offset'"