brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

mmc: dw_mmc: push/pop all FIFO data if any data request

Browse Source 
When DTO interrupt occurred, there are any remaining data still in FIFO
due to RX FIFO threshold is larger than remaining data. It also
causes that dwmmc didn't trigger RXDR interrupt, so is TX.

It's responsibility of driver to read remaining bytes on seeing DTO
interrupt.

Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
This commit is contained in:
Jacob Chen 2016-09-19 10:16:50 +08:00 committed by Jaehoon Chung
parent 6dffdbc3a5
commit 2b42903397
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/mmc/dw_mmc.c
View File

@ -120,9 +120,9 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
if (host->fifo_mode && size) {
len = 0;
if (data->flags == MMC_DATA_READ) {
if ((dwmci_readl(host, DWMCI_RINTSTS) &
DWMCI_INTMSK_RXDR)) {
if (data->flags == MMC_DATA_READ &&
(mask & DWMCI_INTMSK_RXDR)) {
while (size) {
len = dwmci_readl(host, DWMCI_STATUS);
len = (len >> DWMCI_FIFO_SHIFT) &
DWMCI_FIFO_MASK;
@ -130,12 +130,13 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
for (i = 0; i < len; i++)
*buf++ =
dwmci_readl(host, DWMCI_DATA);
dwmci_writel(host, DWMCI_RINTSTS,
DWMCI_INTMSK_RXDR);
size = size > len ? (size - len) : 0;
}
} else {
if ((dwmci_readl(host, DWMCI_RINTSTS) &
DWMCI_INTMSK_TXDR)) {
dwmci_writel(host, DWMCI_RINTSTS,
DWMCI_INTMSK_RXDR);
} else if (data->flags == MMC_DATA_WRITE &&
(mask & DWMCI_INTMSK_TXDR)) {
while (size) {
len = dwmci_readl(host, DWMCI_STATUS);
len = fifo_depth - ((len >>
DWMCI_FIFO_SHIFT) &
@ -144,11 +145,11 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
for (i = 0; i < len; i++)
dwmci_writel(host, DWMCI_DATA,
*buf++);
dwmci_writel(host, DWMCI_RINTSTS,
DWMCI_INTMSK_TXDR);
size = size > len ? (size - len) : 0;
}
dwmci_writel(host, DWMCI_RINTSTS,
DWMCI_INTMSK_TXDR);
}
size = size > len ? (size - len) : 0;
}
/* Data arrived correctly. */