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bios: add flash_transfer_cmd

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Allows to send arbitrary SPI CMDs to the FLASH.
Examples (depending on flash chip):
  - flash_transfer_cmd 0x9F 0x00 0x00 0x00 -> Read ID reg
  - flash_transfer_cmd 0x06 0x01 0x00 -> Global write protect off
This commit is contained in:
Christian Klarhorst 2024-10-26 17:10:34 +02:00
parent 59fc1caac4
commit e2bf669d6c
3 changed files with 33 additions and 1 deletions
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31
litex/soc/software/bios/cmds/cmd_spiflash.c
View file

@ -141,4 +141,35 @@ static void flash_erase_range_handler(int nb_params, char **params)
}
define_command(flash_erase_range, flash_erase_range_handler, "Erase flash range", SPIFLASH_CMDS);
static void flash_transfer_cmd(int nb_params, char **params)
{
int i;
char *c;
uint8_t w_buf[MAX_PARAM];
uint8_t r_buf[MAX_PARAM];
if (nb_params == 0) {
printf("flash_transfer_cmd <CMD_BYTE_0>, ...");
return;
}
for (i = 0; i < nb_params; ++i) {
w_buf[i] = strtoul(params[i], &c, 0);
if (*c != 0) {
printf("Incorrect value of parameter %d", i);
return;
}
}
transfer_cmd(w_buf, r_buf, nb_params);
printf("Result:");
for (i = 0; i < nb_params; ++i) {
printf("%02x ", r_buf[i]);
}
printf("\n");
}
define_command(flash_transfer_cmd, flash_transfer_cmd, "Transfer CMD to/from flash", SPIFLASH_CMDS);
#endif

2
litex/soc/software/liblitespi/spiflash.c
View file

@ -131,7 +131,7 @@ static uint32_t transfer_byte(uint8_t b)
return spiflash_core_master_rxtx_read();
}
static void transfer_cmd(volatile uint8_t *bs, volatile uint8_t *resp, int len)
void transfer_cmd(volatile uint8_t *bs, volatile uint8_t *resp, int len)
{
spiflash_len_mask_width_write(8, 1, 1);
spiflash_core_master_cs_write(1);

1
litex/soc/software/liblitespi/spiflash.h
View file

@ -14,6 +14,7 @@ void spiflash_memspeed(void);
void spiflash_init(void);
int spiflash_write_stream(uint32_t addr, uint8_t *stream, uint32_t len);
void spiflash_erase_range(uint32_t addr, uint32_t len);
void transfer_cmd(volatile uint8_t *bs, volatile uint8_t *resp, int len);
#ifdef __cplusplus
}