From: Faiz Abbas <faiz_abbas@ti.com>
To: <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-mmc@vger.kernel.org>
Cc: <kishon@ti.com>, <adrian.hunter@intel.com>,
<mark.rutland@arm.com>, <robh+dt@kernel.org>,
<ulf.hansson@linaro.org>, <zhang.chunyan@linaro.org>,
<tony@atomide.com>
Subject: [PATCH v3 3/7] mmc: sdhci-omap: Add using external dma
Date: Tue, 10 Dec 2019 15:21:47 +0530 [thread overview]
Message-ID: <20191210095151.15441-4-faiz_abbas@ti.com> (raw)
In-Reply-To: <20191210095151.15441-1-faiz_abbas@ti.com>
From: Chunyan Zhang <zhang.chunyan@linaro.org>
sdhci-omap can support both external dma controller via dmaengine framework
as well as ADMA which standard SD host controller provides.
Fixes by Faiz Abbas <fazi_abbas@ti.com>:
1. Switch to DMA slave mode when using external DMA
2. Add offset to mapbase
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
---
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/sdhci-omap.c | 16 +++++++++++++++-
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 66ba8daa1cbe..89ce19e5755f 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -998,6 +998,7 @@ config MMC_SDHCI_OMAP
depends on MMC_SDHCI_PLTFM && OF
select THERMAL
imply TI_SOC_THERMAL
+ select MMC_SDHCI_EXTERNAL_DMA if DMA_ENGINE
help
This selects the Secure Digital Host Controller Interface (SDHCI)
support present in TI's DRA7 SOCs. The controller supports
diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 083e7e053c95..84d85aa743da 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -685,7 +685,11 @@ static int sdhci_omap_enable_dma(struct sdhci_host *host)
struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON);
- reg |= CON_DMA_MASTER;
+ reg &= ~CON_DMA_MASTER;
+ /* Switch to DMA slave mode when using external DMA */
+ if (!host->use_external_dma)
+ reg |= CON_DMA_MASTER;
+
sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg);
return 0;
@@ -1037,6 +1041,7 @@ static int sdhci_omap_probe(struct platform_device *pdev)
const struct of_device_id *match;
struct sdhci_omap_data *data;
const struct soc_device_attribute *soc;
+ struct resource *regs;
match = of_match_device(omap_sdhci_match, dev);
if (!match)
@@ -1049,6 +1054,10 @@ static int sdhci_omap_probe(struct platform_device *pdev)
}
offset = data->offset;
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+
host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata,
sizeof(*omap_host));
if (IS_ERR(host)) {
@@ -1065,6 +1074,7 @@ static int sdhci_omap_probe(struct platform_device *pdev)
omap_host->timing = MMC_TIMING_LEGACY;
omap_host->flags = data->flags;
host->ioaddr += offset;
+ host->mapbase = regs->start + offset;
mmc = host->mmc;
sdhci_get_of_property(pdev);
@@ -1134,6 +1144,10 @@ static int sdhci_omap_probe(struct platform_device *pdev)
host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning;
host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq;
+ /* Switch to external DMA only if there is the "dmas" property */
+ if (of_find_property(dev->of_node, "dmas", NULL))
+ sdhci_switch_external_dma(host, true);
+
ret = sdhci_setup_host(host);
if (ret)
goto err_put_sync;
--
2.19.2
next prev parent reply other threads:[~2019-12-10 9:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 9:51 [PATCH v3 0/7] Port am335 and am437 devices to sdhci-omap Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 1/7] dt-bindings: sdhci-omap: Add properties for using external dma Faiz Abbas
2019-12-18 21:39 ` Rob Herring
2019-12-10 9:51 ` [PATCH v3 2/7] mmc: sdhci: add support for using external DMA devices Faiz Abbas
2019-12-12 12:55 ` Adrian Hunter
2019-12-16 8:27 ` Faiz Abbas
2019-12-16 13:45 ` Adrian Hunter
2019-12-23 14:25 ` Faiz Abbas
2019-12-10 9:51 ` Faiz Abbas [this message]
2019-12-10 9:51 ` [PATCH v3 4/7] mmc: sdhci: Add quirk for disabling DTO during erase command Faiz Abbas
2019-12-13 9:40 ` Adrian Hunter
2019-12-16 8:42 ` Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 5/7] mmc: sdhci-omap: Add DISABLE_DTO_FOR_ERASE Quirk Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 6/7] dt-bindings: sdhci-omap: Add am335x and am437x specific bindings Faiz Abbas
2019-12-10 9:51 ` [PATCH v3 7/7] mmc: sdhci-omap: Add am335x and am437x specific compatibles Faiz Abbas
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