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path: root/drivers/mmc/host/sdhci_f_sdh30.c
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Diffstat (limited to 'drivers/mmc/host/sdhci_f_sdh30.c')
-rw-r--r--drivers/mmc/host/sdhci_f_sdh30.c113
1 files changed, 65 insertions, 48 deletions
diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
index 3f5977979cf2..e9b934e159ad 100644
--- a/drivers/mmc/host/sdhci_f_sdh30.c
+++ b/drivers/mmc/host/sdhci_f_sdh30.c
@@ -5,6 +5,7 @@
* Copyright (C) 2013 - 2015 Fujitsu Semiconductor, Ltd
* Vincent Yang <vincent.yang@tw.fujitsu.com>
* Copyright (C) 2015 Linaro Ltd Andy Green <andy.green@linaro.org>
+ * Copyright (C) 2019 Socionext Inc.
*/
#include <linux/acpi.h>
@@ -14,6 +15,7 @@
#include <linux/of.h>
#include <linux/property.h>
#include <linux/clk.h>
+#include <linux/reset.h>
#include "sdhci-pltfm.h"
#include "sdhci_f_sdh30.h"
@@ -21,14 +23,22 @@
struct f_sdhost_priv {
struct clk *clk_iface;
struct clk *clk;
+ struct reset_control *rst;
u32 vendor_hs200;
struct device *dev;
bool enable_cmd_dat_delay;
};
+static void *sdhci_f_sdhost_priv(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return sdhci_pltfm_priv(pltfm_host);
+}
+
static void sdhci_f_sdh30_soft_voltage_switch(struct sdhci_host *host)
{
- struct f_sdhost_priv *priv = sdhci_priv(host);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
u32 ctrl = 0;
usleep_range(2500, 3000);
@@ -61,7 +71,7 @@ static unsigned int sdhci_f_sdh30_get_min_clock(struct sdhci_host *host)
static void sdhci_f_sdh30_reset(struct sdhci_host *host, u8 mask)
{
- struct f_sdhost_priv *priv = sdhci_priv(host);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
u32 ctl;
if (sdhci_readw(host, SDHCI_CLOCK_CONTROL) == 0)
@@ -74,6 +84,13 @@ static void sdhci_f_sdh30_reset(struct sdhci_host *host, u8 mask)
ctl |= F_SDH30_CMD_DAT_DELAY;
sdhci_writel(host, ctl, F_SDH30_ESD_CONTROL);
}
+
+ if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) &&
+ !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
+ ctl = sdhci_readl(host, F_SDH30_TEST);
+ ctl |= F_SDH30_FORCE_CARD_INSERT;
+ sdhci_writel(host, ctl, F_SDH30_TEST);
+ }
}
static const struct sdhci_ops sdhci_f_sdh30_ops = {
@@ -85,61 +102,49 @@ static const struct sdhci_ops sdhci_f_sdh30_ops = {
.set_uhs_signaling = sdhci_set_uhs_signaling,
};
+static const struct sdhci_pltfm_data sdhci_f_sdh30_pltfm_data = {
+ .ops = &sdhci_f_sdh30_ops,
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
+ | SDHCI_QUIRK_INVERTED_WRITE_PROTECT,
+ .quirks2 = SDHCI_QUIRK2_SUPPORT_SINGLE
+ | SDHCI_QUIRK2_TUNING_WORK_AROUND,
+};
+
static int sdhci_f_sdh30_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
struct device *dev = &pdev->dev;
- int irq, ctrl = 0, ret = 0;
+ int ctrl = 0, ret = 0;
struct f_sdhost_priv *priv;
+ struct sdhci_pltfm_host *pltfm_host;
u32 reg = 0;
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- host = sdhci_alloc_host(dev, sizeof(struct f_sdhost_priv));
+ host = sdhci_pltfm_init(pdev, &sdhci_f_sdh30_pltfm_data,
+ sizeof(struct f_sdhost_priv));
if (IS_ERR(host))
return PTR_ERR(host);
- priv = sdhci_priv(host);
+ pltfm_host = sdhci_priv(host);
+ priv = sdhci_pltfm_priv(pltfm_host);
priv->dev = dev;
- host->quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
- SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
- host->quirks2 = SDHCI_QUIRK2_SUPPORT_SINGLE |
- SDHCI_QUIRK2_TUNING_WORK_AROUND;
-
priv->enable_cmd_dat_delay = device_property_read_bool(dev,
"fujitsu,cmd-dat-delay-select");
ret = mmc_of_parse(host->mmc);
if (ret)
- goto err;
-
- platform_set_drvdata(pdev, host);
-
- host->hw_name = "f_sdh30";
- host->ops = &sdhci_f_sdh30_ops;
- host->irq = irq;
-
- host->ioaddr = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(host->ioaddr)) {
- ret = PTR_ERR(host->ioaddr);
- goto err;
- }
+ return ret;
if (dev_of_node(dev)) {
sdhci_get_of_property(pdev);
priv->clk_iface = devm_clk_get(&pdev->dev, "iface");
- if (IS_ERR(priv->clk_iface)) {
- ret = PTR_ERR(priv->clk_iface);
- goto err;
- }
+ if (IS_ERR(priv->clk_iface))
+ return PTR_ERR(priv->clk_iface);
ret = clk_prepare_enable(priv->clk_iface);
if (ret)
- goto err;
+ return ret;
priv->clk = devm_clk_get(&pdev->dev, "core");
if (IS_ERR(priv->clk)) {
@@ -150,6 +155,16 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
ret = clk_prepare_enable(priv->clk);
if (ret)
goto err_clk;
+
+ priv->rst = devm_reset_control_get_optional_shared(dev, NULL);
+ if (IS_ERR(priv->rst)) {
+ ret = PTR_ERR(priv->rst);
+ goto err_rst;
+ }
+
+ ret = reset_control_deassert(priv->rst);
+ if (ret)
+ goto err_rst;
}
/* init vendor specific regs */
@@ -168,6 +183,9 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
if (reg & SDHCI_CAN_DO_8BIT)
priv->vendor_hs200 = F_SDH30_EMMC_HS200;
+ if (!(reg & SDHCI_TIMEOUT_CLK_MASK))
+ host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
+
ret = sdhci_add_host(host);
if (ret)
goto err_add_host;
@@ -175,34 +193,33 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
return 0;
err_add_host:
+ reset_control_assert(priv->rst);
+err_rst:
clk_disable_unprepare(priv->clk);
err_clk:
clk_disable_unprepare(priv->clk_iface);
-err:
- sdhci_free_host(host);
return ret;
}
-static int sdhci_f_sdh30_remove(struct platform_device *pdev)
+static void sdhci_f_sdh30_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
- struct f_sdhost_priv *priv = sdhci_priv(host);
-
- sdhci_remove_host(host, readl(host->ioaddr + SDHCI_INT_STATUS) ==
- 0xffffffff);
-
- clk_disable_unprepare(priv->clk_iface);
- clk_disable_unprepare(priv->clk);
+ struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
+ struct clk *clk_iface = priv->clk_iface;
+ struct reset_control *rst = priv->rst;
+ struct clk *clk = priv->clk;
- sdhci_free_host(host);
- platform_set_drvdata(pdev, NULL);
+ sdhci_pltfm_remove(pdev);
- return 0;
+ reset_control_assert(rst);
+ clk_disable_unprepare(clk);
+ clk_disable_unprepare(clk_iface);
}
#ifdef CONFIG_OF
static const struct of_device_id f_sdh30_dt_ids[] = {
{ .compatible = "fujitsu,mb86s70-sdhci-3.0" },
+ { .compatible = "socionext,f-sdh30-e51-mmc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, f_sdh30_dt_ids);
@@ -224,13 +241,13 @@ static struct platform_driver sdhci_f_sdh30_driver = {
.acpi_match_table = ACPI_PTR(f_sdh30_acpi_ids),
.pm = &sdhci_pltfm_pmops,
},
- .probe = sdhci_f_sdh30_probe,
- .remove = sdhci_f_sdh30_remove,
+ .probe = sdhci_f_sdh30_probe,
+ .remove = sdhci_f_sdh30_remove,
};
module_platform_driver(sdhci_f_sdh30_driver);
MODULE_DESCRIPTION("F_SDH30 SD Card Controller driver");
MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("FUJITSU SEMICONDUCTOR LTD.");
+MODULE_AUTHOR("FUJITSU SEMICONDUCTOR LTD., Socionext Inc.");
MODULE_ALIAS("platform:f_sdh30");
generated by cgit (git 2.34.1) at 2025-12-27 20:34:07 +0000