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| author | Marek Vasut <marek.vasut+renesas@mailbox.org> | 2024-02-20 09:38:14 +0100 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2024-04-15 15:19:12 +0900 |
| commit | 60649a8d6cc975a36d06aad14ed55079e75bc4fa (patch) | |
| tree | 7aadcd5e9163ecff0832564b5ff9c91442bdfbf7 | |
| parent | a3b2786651c7966ea9038f16c97f401406bdf7d3 (diff) | |
| download | u-boot-60649a8d6cc975a36d06aad14ed55079e75bc4fa.zip u-boot-60649a8d6cc975a36d06aad14ed55079e75bc4fa.tar.gz u-boot-60649a8d6cc975a36d06aad14ed55079e75bc4fa.tar.bz2 | |
mmc: tmio: Check INFO1 for completion during DMA transfer
In case a CRC error occurs during DMA transfer, the transfer completion
flag is not set in TMIO_SD_DMA_INFO1 and the transfer would eventually
time out. The timeout could be very long in case the transfer consists
of a large amount of blocks, the base timeout is 10 seconds and every
block adds 100 us more.
In case a CRC error does occur, a completion flag is set in a different
register, TMIO_SD_INFO1. Use this other completion flag to detect DMA
transfer ended and stop waiting for TMIO_SD_DMA_INFO1 completion flag.
This reduces the lengthy timeout in case of an error. The unconditional
check of TMIO_SD_DMA_INFO2 register for DMA related errors must not be
skipped in any case to actually recognize the DMA error and report it.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Tested-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
| -rw-r--r-- | drivers/mmc/tmio-common.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c index 890c496..719c483 100644 --- a/drivers/mmc/tmio-common.c +++ b/drivers/mmc/tmio-common.c @@ -299,7 +299,13 @@ static int tmio_sd_dma_wait_for_irq(struct udevice *dev, u32 flag, struct tmio_sd_priv *priv = dev_get_priv(dev); long wait = 1000000 + 10 * blocks; - while (!(tmio_sd_readl(priv, TMIO_SD_DMA_INFO1) & flag)) { + for (;;) { + if (tmio_sd_readl(priv, TMIO_SD_DMA_INFO1) & flag) + break; + + if (tmio_sd_readl(priv, TMIO_SD_INFO1) & TMIO_SD_INFO1_CMP) + break; + if (wait-- < 0) { dev_err(dev, "timeout during DMA\n"); return -ETIMEDOUT; |