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Merge pull request #979 from antmicro/litespi-qpi 

WIP: enable QPI mode in liblitespi
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enjoy-digital 2021-07-29 17:59:51 +02:00 committed by GitHub
parent c5b5abd103 0a0e337754
commit 1933beadb1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 32 additions and 0 deletions
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32
litex/soc/software/liblitespi/spiflash.c
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@ -56,6 +56,22 @@ void spiflash_dummy_bits_setup(unsigned int dummy_bits)
#endif
}
static void spiflash_master_write(uint32_t val, size_t len, size_t width, uint32_t mask)
{
/* empty rx queue */
while (spiflash_mmap_master_status_rx_ready_read())
spiflash_mmap_master_rxtx_read();
spiflash_mmap_master_cs_write(1);
spiflash_mmap_master_phyconfig_len_write(8 * len);
spiflash_mmap_master_phyconfig_mask_write(mask);
spiflash_mmap_master_phyconfig_width_write(width);
spiflash_mmap_master_rxtx_write(val);
while (!spiflash_mmap_master_status_rx_ready_read());
spiflash_mmap_master_cs_write(0);
}
void spiflash_init(void)
{
int ret;
@ -68,6 +84,22 @@ void spiflash_init(void)
#if (USER_DEFINED_DUMMY_BITS > 0)
spiflash_dummy_bits_setup(USER_DEFINED_DUMMY_BITS);
#endif
#ifdef FLASH_CHIP_MX25L12833F_QUAD
/* enable write enable latch */
printf("Enabling quad lines on MX25L12833F...\n");
spiflash_master_write(0x00000006, 1, 1, 0x1);
/* enable quad lines */
spiflash_master_write(0x00014307, 3, 1, 0x1);
#ifdef FLASH_CHIP_MX25L12833F_QPI
/* enter qpi */
printf("Entering QPI mode...\n");
spiflash_master_write(0x00000035, 1, 1, 0x1);
#endif
#endif /* FLASH_CHIP_MX25L12833F_QUAD */
}
#endif