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software/liblitesata: update to multi-sector read, write

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The LiteSATA gateware now supports multi-sector transfers, and expects
a sector count register to be populated by the software before a DMA
transfer is initiated.

This patch also fixes checks for `done` and `error` during writes by
using the correct `mem2sector` read function (instead of `sector2mem`,
which is for use during read operations).

Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
This commit is contained in:
Gabriel Somlo 2023-06-20 13:26:30 -04:00
parent a9d6a0c6c9
commit 7d1e12c870
1 changed files with 18 additions and 25 deletions
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43
litex/soc/software/liblitesata/sata.c
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@ -100,20 +100,16 @@ int sata_init(int show) {
void sata_read(uint32_t sector, uint32_t count, uint8_t* buf)
{
uint32_t i;
uint8_t done = 0;
/* Write sectors */
for (i=0; i<count; i++) {
uint8_t done = 0;
while (done == 0) {
sata_sector2mem_base_write((uint64_t)(uintptr_t) buf);
sata_sector2mem_sector_write(sector + i);
sata_sector2mem_start_write(1);
while ((sata_sector2mem_done_read() & 0x1) == 0);
done = ((sata_sector2mem_error_read() & 0x1) == 0);
busy_wait_us(10);
}
buf += 512;
while (done == 0) {
sata_sector2mem_base_write((uint64_t)(uintptr_t) buf);
sata_sector2mem_sector_write(sector);
sata_sector2mem_nsectors_write(count);
sata_sector2mem_start_write(1);
while ((sata_sector2mem_done_read() & 0x1) == 0);
done = ((sata_sector2mem_error_read() & 0x1) == 0);
busy_wait_us(10);
}
#ifndef CONFIG_CPU_HAS_DMA_BUS
@ -129,20 +125,17 @@ void sata_read(uint32_t sector, uint32_t count, uint8_t* buf)
void sata_write(uint32_t sector, uint32_t count, uint8_t* buf)
{
uint32_t i;
uint8_t done = 0;
/* Write sectors */
for (i=0; i<count; i++) {
uint8_t done = 0;
while (done == 0) {
sata_mem2sector_base_write((uint64_t)(uintptr_t) buf);
sata_mem2sector_sector_write(sector + i);
sata_mem2sector_start_write(1);
while ((sata_sector2mem_done_read() & 0x1) == 0);
done = ((sata_sector2mem_error_read() & 0x1) == 0);
busy_wait_us(10);
}
buf += 512;
while (done == 0) {
sata_mem2sector_base_write((uint64_t)(uintptr_t) buf);
sata_mem2sector_sector_write(sector);
sata_mem2sector_nsectors_write(count);
sata_mem2sector_start_write(1);
while ((sata_mem2sector_done_read() & 0x1) == 0);
done = ((sata_mem2sector_error_read() & 0x1) == 0);
busy_wait_us(10);
}
}