diff options
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 11 | ||||
| -rw-r--r-- | drivers/mmc/host/dw_mmc.h | 3 |
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 94d8fe321260..c04a5769e2ea 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1112,11 +1112,15 @@ static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) mci_writel(host, CTRL, temp); /* - * Use the initial fifoth_val for PIO mode. + * Use the initial fifoth_val for PIO mode. If wm_algined + * is set, we set watermark same as data size. * If next issued data may be transfered by DMA mode, * prev_blksz should be invalidated. */ - mci_writel(host, FIFOTH, host->fifoth_val); + if (host->wm_aligned) + dw_mci_adjust_fifoth(host, data); + else + mci_writel(host, FIFOTH, host->fifoth_val); host->prev_blksz = 0; } else { /* @@ -2978,6 +2982,9 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) of_property_read_u32(np, "data-addr", &host->data_addr_override); + if (of_get_property(np, "fifo-watermark-aligned", NULL)) + host->wm_aligned = true; + if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) pdata->bus_hz = clock_frequency; diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index e08e3272a5ad..ce347361f3dc 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -115,6 +115,8 @@ struct dw_mci_dma_slave { * @slot: Slots sharing this MMC controller. * @fifo_depth: depth of FIFO. * @data_addr_override: override fifo reg offset with this value. + * @wm_aligned: force fifo watermark equal with data length in PIO mode. + * Set as true if alignment is needed. * @data_shift: log2 of FIFO item size. * @part_buf_start: Start index in part_buf. * @part_buf_count: Bytes of partial data in part_buf. @@ -163,6 +165,7 @@ struct dw_mci { void __iomem *regs; void __iomem *fifo_reg; u32 data_addr_override; + bool wm_aligned; struct scatterlist *sg; struct sg_mapping_iter sg_miter; |