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-rw-r--r--drivers/phy/Kconfig6
-rw-r--r--drivers/phy/Makefile1
-rw-r--r--drivers/phy/phy-core.c44
-rw-r--r--drivers/phy/phy-mvebu-sata.c137
4 files changed, 175 insertions, 13 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index a49e85349d8..b901c472d7f 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -21,6 +21,12 @@ config PHY_EXYNOS_MIPI_VIDEO
Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P
and EXYNOS SoCs.
+config PHY_MVEBU_SATA
+ def_bool y
+ depends on ARCH_KIRKWOOD || ARCH_DOVE
+ depends on OF
+ select GENERIC_PHY
+
config OMAP_USB2
tristate "OMAP USB2 PHY Driver"
depends on ARCH_OMAP2PLUS
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index c447f1a98ac..b57c25371cc 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -6,5 +6,6 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o
obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o
obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
+obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 58e0e973902..645c867c125 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -94,19 +94,31 @@ static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
int phy_pm_runtime_get(struct phy *phy)
{
+ int ret;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
- return pm_runtime_get(&phy->dev);
+ ret = pm_runtime_get(&phy->dev);
+ if (ret < 0 && ret != -EINPROGRESS)
+ pm_runtime_put_noidle(&phy->dev);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(phy_pm_runtime_get);
int phy_pm_runtime_get_sync(struct phy *phy)
{
+ int ret;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
- return pm_runtime_get_sync(&phy->dev);
+ ret = pm_runtime_get_sync(&phy->dev);
+ if (ret < 0)
+ pm_runtime_put_sync(&phy->dev);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
@@ -155,13 +167,14 @@ int phy_init(struct phy *phy)
return ret;
mutex_lock(&phy->mutex);
- if (phy->init_count++ == 0 && phy->ops->init) {
+ if (phy->init_count == 0 && phy->ops->init) {
ret = phy->ops->init(phy);
if (ret < 0) {
dev_err(&phy->dev, "phy init failed --> %d\n", ret);
goto out;
}
}
+ ++phy->init_count;
out:
mutex_unlock(&phy->mutex);
@@ -179,13 +192,14 @@ int phy_exit(struct phy *phy)
return ret;
mutex_lock(&phy->mutex);
- if (--phy->init_count == 0 && phy->ops->exit) {
+ if (phy->init_count == 1 && phy->ops->exit) {
ret = phy->ops->exit(phy);
if (ret < 0) {
dev_err(&phy->dev, "phy exit failed --> %d\n", ret);
goto out;
}
}
+ --phy->init_count;
out:
mutex_unlock(&phy->mutex);
@@ -196,23 +210,27 @@ EXPORT_SYMBOL_GPL(phy_exit);
int phy_power_on(struct phy *phy)
{
- int ret = -ENOTSUPP;
+ int ret;
ret = phy_pm_runtime_get_sync(phy);
if (ret < 0 && ret != -ENOTSUPP)
return ret;
mutex_lock(&phy->mutex);
- if (phy->power_count++ == 0 && phy->ops->power_on) {
+ if (phy->power_count == 0 && phy->ops->power_on) {
ret = phy->ops->power_on(phy);
if (ret < 0) {
dev_err(&phy->dev, "phy poweron failed --> %d\n", ret);
goto out;
}
}
+ ++phy->power_count;
+ mutex_unlock(&phy->mutex);
+ return 0;
out:
mutex_unlock(&phy->mutex);
+ phy_pm_runtime_put_sync(phy);
return ret;
}
@@ -220,22 +238,22 @@ EXPORT_SYMBOL_GPL(phy_power_on);
int phy_power_off(struct phy *phy)
{
- int ret = -ENOTSUPP;
+ int ret;
mutex_lock(&phy->mutex);
- if (--phy->power_count == 0 && phy->ops->power_off) {
+ if (phy->power_count == 1 && phy->ops->power_off) {
ret = phy->ops->power_off(phy);
if (ret < 0) {
dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret);
- goto out;
+ mutex_unlock(&phy->mutex);
+ return ret;
}
}
-
-out:
+ --phy->power_count;
mutex_unlock(&phy->mutex);
phy_pm_runtime_put(phy);
- return ret;
+ return 0;
}
EXPORT_SYMBOL_GPL(phy_power_off);
@@ -360,7 +378,7 @@ EXPORT_SYMBOL_GPL(of_phy_simple_xlate);
struct phy *phy_get(struct device *dev, const char *string)
{
int index = 0;
- struct phy *phy = NULL;
+ struct phy *phy;
if (string == NULL) {
dev_WARN(dev, "missing string\n");
diff --git a/drivers/phy/phy-mvebu-sata.c b/drivers/phy/phy-mvebu-sata.c
new file mode 100644
index 00000000000..d43786f6243
--- /dev/null
+++ b/drivers/phy/phy-mvebu-sata.c
@@ -0,0 +1,137 @@
+/*
+ * phy-mvebu-sata.c: SATA Phy driver for the Marvell mvebu SoCs.
+ *
+ * Copyright (C) 2013 Andrew Lunn <andrew@lunn.ch>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/phy/phy.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+struct priv {
+ struct clk *clk;
+ void __iomem *base;
+};
+
+#define SATA_PHY_MODE_2 0x0330
+#define MODE_2_FORCE_PU_TX BIT(0)
+#define MODE_2_FORCE_PU_RX BIT(1)
+#define MODE_2_PU_PLL BIT(2)
+#define MODE_2_PU_IVREF BIT(3)
+#define SATA_IF_CTRL 0x0050
+#define CTRL_PHY_SHUTDOWN BIT(9)
+
+static int phy_mvebu_sata_power_on(struct phy *phy)
+{
+ struct priv *priv = phy_get_drvdata(phy);
+ u32 reg;
+
+ clk_prepare_enable(priv->clk);
+
+ /* Enable PLL and IVREF */
+ reg = readl(priv->base + SATA_PHY_MODE_2);
+ reg |= (MODE_2_FORCE_PU_TX | MODE_2_FORCE_PU_RX |
+ MODE_2_PU_PLL | MODE_2_PU_IVREF);
+ writel(reg , priv->base + SATA_PHY_MODE_2);
+
+ /* Enable PHY */
+ reg = readl(priv->base + SATA_IF_CTRL);
+ reg &= ~CTRL_PHY_SHUTDOWN;
+ writel(reg, priv->base + SATA_IF_CTRL);
+
+ clk_disable_unprepare(priv->clk);
+
+ return 0;
+}
+
+static int phy_mvebu_sata_power_off(struct phy *phy)
+{
+ struct priv *priv = phy_get_drvdata(phy);
+ u32 reg;
+
+ clk_prepare_enable(priv->clk);
+
+ /* Disable PLL and IVREF */
+ reg = readl(priv->base + SATA_PHY_MODE_2);
+ reg &= ~(MODE_2_FORCE_PU_TX | MODE_2_FORCE_PU_RX |
+ MODE_2_PU_PLL | MODE_2_PU_IVREF);
+ writel(reg, priv->base + SATA_PHY_MODE_2);
+
+ /* Disable PHY */
+ reg = readl(priv->base + SATA_IF_CTRL);
+ reg |= CTRL_PHY_SHUTDOWN;
+ writel(reg, priv->base + SATA_IF_CTRL);
+
+ clk_disable_unprepare(priv->clk);
+
+ return 0;
+}
+
+static struct phy_ops phy_mvebu_sata_ops = {
+ .power_on = phy_mvebu_sata_power_on,
+ .power_off = phy_mvebu_sata_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int phy_mvebu_sata_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ struct priv *priv;
+ struct phy *phy;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->clk = devm_clk_get(&pdev->dev, "sata");
+ if (IS_ERR(priv->clk))
+ return PTR_ERR(priv->clk);
+
+ phy_provider = devm_of_phy_provider_register(&pdev->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ phy = devm_phy_create(&pdev->dev, &phy_mvebu_sata_ops, NULL);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ phy_set_drvdata(phy, priv);
+
+ /* The boot loader may of left it on. Turn it off. */
+ phy_mvebu_sata_power_off(phy);
+
+ return 0;
+}
+
+static const struct of_device_id phy_mvebu_sata_of_match[] = {
+ { .compatible = "marvell,mvebu-sata-phy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, phy_mvebu_sata_of_match);
+
+static struct platform_driver phy_mvebu_sata_driver = {
+ .probe = phy_mvebu_sata_probe,
+ .driver = {
+ .name = "phy-mvebu-sata",
+ .owner = THIS_MODULE,
+ .of_match_table = phy_mvebu_sata_of_match,
+ }
+};
+module_platform_driver(phy_mvebu_sata_driver);
+
+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
+MODULE_DESCRIPTION("Marvell MVEBU SATA PHY driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 06:15:59 +0000