101 lines
3.0 KiB
Diff
101 lines
3.0 KiB
Diff
From bb3e08008c0e48fd4f51a0f0957eecae61a24d69 Mon Sep 17 00:00:00 2001
|
|
From: Peter Robinson <pbrobinson@gmail.com>
|
|
Date: Tue, 1 Nov 2016 09:35:30 +0000
|
|
Subject: [PATCH] Revert "mmc: omap_hsmmc: Use dma_request_chan() for
|
|
requesting DMA channel"
|
|
|
|
This reverts commit 81eef6ca92014845d40e3f1310e42b7010303acc.
|
|
---
|
|
drivers/mmc/host/omap_hsmmc.c | 50 ++++++++++++++++++++++++++++++++++---------
|
|
1 file changed, 40 insertions(+), 10 deletions(-)
|
|
|
|
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
|
|
index 24ebc9a..3563321 100644
|
|
--- a/drivers/mmc/host/omap_hsmmc.c
|
|
+++ b/drivers/mmc/host/omap_hsmmc.c
|
|
@@ -32,6 +32,7 @@
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of_device.h>
|
|
+#include <linux/omap-dmaengine.h>
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mmc/core.h>
|
|
#include <linux/mmc/mmc.h>
|
|
@@ -1992,6 +1993,8 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
|
|
struct resource *res;
|
|
int ret, irq;
|
|
const struct of_device_id *match;
|
|
+ dma_cap_mask_t mask;
|
|
+ unsigned tx_req, rx_req;
|
|
const struct omap_mmc_of_data *data;
|
|
void __iomem *base;
|
|
|
|
@@ -2121,17 +2124,44 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
|
|
|
|
omap_hsmmc_conf_bus_power(host);
|
|
|
|
- host->rx_chan = dma_request_chan(&pdev->dev, "rx");
|
|
- if (IS_ERR(host->rx_chan)) {
|
|
- dev_err(mmc_dev(host->mmc), "RX DMA channel request failed\n");
|
|
- ret = PTR_ERR(host->rx_chan);
|
|
+ if (!pdev->dev.of_node) {
|
|
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
|
|
+ if (!res) {
|
|
+ dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
|
|
+ ret = -ENXIO;
|
|
+ goto err_irq;
|
|
+ }
|
|
+ tx_req = res->start;
|
|
+
|
|
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
|
|
+ if (!res) {
|
|
+ dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
|
|
+ ret = -ENXIO;
|
|
+ goto err_irq;
|
|
+ }
|
|
+ rx_req = res->start;
|
|
+ }
|
|
+
|
|
+ dma_cap_zero(mask);
|
|
+ dma_cap_set(DMA_SLAVE, mask);
|
|
+
|
|
+ host->rx_chan =
|
|
+ dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
|
|
+ &rx_req, &pdev->dev, "rx");
|
|
+
|
|
+ if (!host->rx_chan) {
|
|
+ dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n");
|
|
+ ret = -ENXIO;
|
|
goto err_irq;
|
|
}
|
|
|
|
- host->tx_chan = dma_request_chan(&pdev->dev, "tx");
|
|
- if (IS_ERR(host->tx_chan)) {
|
|
- dev_err(mmc_dev(host->mmc), "TX DMA channel request failed\n");
|
|
- ret = PTR_ERR(host->tx_chan);
|
|
+ host->tx_chan =
|
|
+ dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
|
|
+ &tx_req, &pdev->dev, "tx");
|
|
+
|
|
+ if (!host->tx_chan) {
|
|
+ dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n");
|
|
+ ret = -ENXIO;
|
|
goto err_irq;
|
|
}
|
|
|
|
@@ -2189,9 +2219,9 @@ err_slot_name:
|
|
mmc_remove_host(mmc);
|
|
err_irq:
|
|
device_init_wakeup(&pdev->dev, false);
|
|
- if (!IS_ERR_OR_NULL(host->tx_chan))
|
|
+ if (host->tx_chan)
|
|
dma_release_channel(host->tx_chan);
|
|
- if (!IS_ERR_OR_NULL(host->rx_chan))
|
|
+ if (host->rx_chan)
|
|
dma_release_channel(host->rx_chan);
|
|
pm_runtime_dont_use_autosuspend(host->dev);
|
|
pm_runtime_put_sync(host->dev);
|
|
--
|
|
2.9.3
|
|
|