When resuming from suspend on Armada 38x SoC MBus windows have to be
re-configured and for that purpose mv_conf_mbus_windows function needed
rework. MBus windows register base address obtaining was moved to
armada_38x_quirks function in order to be kept in pxa global structure,
because it is used during a resume.
This commit fixes resuming from suspend by calling MBus windows
configuration routine and therefore enabling proper DMA operation.
Signed-off-by: Marcin Wojtas <m...@semihalf.com>
---
drivers/mmc/host/sdhci-pxav3.c | 38 +++++++++++++++++++-------------------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index f5edf9d..76b9a70 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -63,6 +63,7 @@ struct sdhci_pxa {
struct clk *clk_io;
u8 power_mode;
void __iomem *sdio3_conf_reg;
+ void __iomem *mbus_win_regs;
};
/*
@@ -81,30 +82,16 @@ struct sdhci_pxa {
#define SDIO3_CONF_CLK_INV BIT(0)
#define SDIO3_CONF_SD_FB_CLK BIT(2)
-static int mv_conf_mbus_windows(struct platform_device *pdev,
+static int mv_conf_mbus_windows(struct device *dev, void __iomem *regs,
const struct mbus_dram_target_info *dram)
{
int i;
- void __iomem *regs;
- struct resource *res;
if (!dram) {
- dev_err(&pdev->dev, "no mbus dram info\n");
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res) {
- dev_err(&pdev->dev, "cannot get mbus registers\n");
+ dev_err(dev, "no mbus dram info\n");
return -EINVAL;
}
- regs = ioremap(res->start, resource_size(res));
- if (!regs) {
- dev_err(&pdev->dev, "cannot map mbus registers\n");
- return -ENOMEM;
- }
-
for (i = 0; i < SDHCI_MAX_WIN_NUM; i++) {
writel(0, regs + SDHCI_WINDOW_CTRL(i));
writel(0, regs + SDHCI_WINDOW_BASE(i));
@@ -122,8 +109,6 @@ static int mv_conf_mbus_windows(struct platform_device
*pdev,
writel(cs->base, regs + SDHCI_WINDOW_BASE(i));
}
- iounmap(regs);
-
return 0;
}
@@ -135,6 +120,14 @@ static int armada_38x_quirks(struct platform_device *pdev,
struct sdhci_pxa *pxa = pltfm_host->priv;
struct resource *res;
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mbus");
+ pxa->mbus_win_regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pxa->mbus_win_regs)) {
+ dev_err(mmc_dev(host->mmc),
+ "failed to obtain MBus windows register base\n");
+ return PTR_ERR(pxa->mbus_win_regs);
+ }
+
host->quirks &= ~SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN;
host->quirks |= SDHCI_QUIRK_MISSING_CAPS;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -403,7 +396,8 @@ static int sdhci_pxav3_probe(struct platform_device *pdev)
ret = armada_38x_quirks(pdev, host);
if (ret < 0)
goto err_mbus_win;
- ret = mv_conf_mbus_windows(pdev, mv_mbus_dram_info());
+ ret = mv_conf_mbus_windows(&pdev->dev, pxa->mbus_win_regs,
+ mv_mbus_dram_info());
if (ret < 0)
goto err_mbus_win;
}
@@ -520,6 +514,12 @@ static int sdhci_pxav3_resume(struct device *dev)
{
int ret;
struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_pxa *pxa = pltfm_host->priv;
+
+ if (pxa->mbus_win_regs)
+ ret = mv_conf_mbus_windows(dev, pxa->mbus_win_regs,
+ mv_mbus_dram_info());
pm_runtime_get_sync(dev);
ret = sdhci_resume_host(host);
--
1.8.3.1
--
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