Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
sdmmc_host: support multiblock transfers
Change-Id: I6414028bbafd4ea4ef469f9a387f4bd52ec227e5
+37
-6
+34
-6
firmware/drivers/sdmmc_host.c
+34
-6
firmware/drivers/sdmmc_host.c
···
677
677
if (start + count > host->cardinfo.numblocks)
678
678
goto out;
679
679
680
+
int max_nr_blocks = MAX(host->config.max_nr_blocks, 1);
680
681
while (count > 0)
681
682
{
682
-
/* TODO: multiple block transfers */
683
-
int xfer_count = 1;
683
+
int xfer_count = count;
684
+
if (xfer_count > max_nr_blocks)
685
+
xfer_count = max_nr_blocks;
684
686
685
687
/* Set block length for non-HCS cards */
686
688
if (!host->is_hcs_card)
···
692
694
693
695
struct sdmmc_host_command cmd = {
694
696
.buffer = buf,
695
-
.nr_blocks = 1,
697
+
.nr_blocks = xfer_count,
696
698
.block_len = SD_BLOCK_SIZE,
697
699
.flags = SDMMC_RESP_SHORT | data_dir,
698
700
};
699
701
700
-
if (data_dir == SDMMC_DATA_WRITE)
701
-
cmd.command = SD_WRITE_BLOCK;
702
+
if (xfer_count > 1)
703
+
{
704
+
if (data_dir == SDMMC_DATA_WRITE)
705
+
cmd.command = SD_WRITE_MULTIPLE_BLOCK;
706
+
else
707
+
cmd.command = SD_READ_MULTIPLE_BLOCK;
708
+
}
702
709
else
703
-
cmd.command = SD_READ_SINGLE_BLOCK;
710
+
{
711
+
if (data_dir == SDMMC_DATA_WRITE)
712
+
cmd.command = SD_WRITE_BLOCK;
713
+
else
714
+
cmd.command = SD_READ_SINGLE_BLOCK;
715
+
}
704
716
705
717
if (host->cardinfo.sd2plus)
706
718
cmd.argument = start;
···
710
722
rc = sdmmc_host_submit_cmd(host, &cmd, NULL);
711
723
if (rc)
712
724
goto out;
725
+
726
+
/*
727
+
* NOTE: some controllers can send CMD12 automatically after
728
+
* the end of a transfer, eg. X1000; it might be worth
729
+
* supporting that via a feature flag.
730
+
*/
731
+
if (xfer_count > 1)
732
+
{
733
+
memset(&cmd, 0, sizeof(cmd));
734
+
cmd.command = SD_STOP_TRANSMISSION;
735
+
cmd.flags = SDMMC_RESP_SHORT | SDMMC_RESP_BUSY;
736
+
737
+
rc = sdmmc_host_submit_cmd(host, &cmd, NULL);
738
+
if (rc)
739
+
goto out;
740
+
}
713
741
714
742
buf += xfer_count * SD_BLOCK_SIZE;
715
743
start += xfer_count;