diff options
Diffstat (limited to 'drivers/mmc/host/tmio_mmc_dma.c')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_dma.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c index dc4b10b..5fcf14f 100644 --- a/drivers/mmc/host/tmio_mmc_dma.c +++ b/drivers/mmc/host/tmio_mmc_dma.c @@ -268,7 +268,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat return; if (!host->chan_tx && !host->chan_rx) { + struct resource *res = platform_get_resource(host->pdev, + IORESOURCE_MEM, 0); + struct dma_slave_config cfg = {}; dma_cap_mask_t mask; + int ret; + + if (!res) + return; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); @@ -281,6 +288,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat if (!host->chan_tx) return; + cfg.slave_id = pdata->dma->slave_id_tx; + cfg.direction = DMA_MEM_TO_DEV; + cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift); + cfg.src_addr = 0; + ret = dmaengine_slave_config(host->chan_tx, &cfg); + if (ret < 0) + goto ecfgtx; + host->chan_rx = dma_request_channel(mask, pdata->dma->filter, pdata->dma->chan_priv_rx); dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__, @@ -289,6 +304,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat if (!host->chan_rx) goto ereqrx; + cfg.slave_id = pdata->dma->slave_id_rx; + cfg.direction = DMA_DEV_TO_MEM; + cfg.src_addr = cfg.dst_addr; + cfg.dst_addr = 0; + ret = dmaengine_slave_config(host->chan_rx, &cfg); + if (ret < 0) + goto ecfgrx; + host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA); if (!host->bounce_buf) goto ebouncebuf; @@ -302,9 +325,11 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat return; ebouncebuf: +ecfgrx: dma_release_channel(host->chan_rx); host->chan_rx = NULL; ereqrx: +ecfgtx: dma_release_channel(host->chan_tx); host->chan_tx = NULL; } |