usb: phy: tegra: don't call into tegra-ehci directly

Both phy-tegra-usb.c and ehci-tegra.c export symbols used by the other one,
which does not work if one of them or both are loadable modules, resulting
in an error like:

drivers/built-in.o: In function `utmi_phy_clk_disable':
drivers/usb/phy/phy-tegra-usb.c:302: undefined reference to `tegra_ehci_set_phcd'
drivers/built-in.o: In function `utmi_phy_clk_enable':
drivers/usb/phy/phy-tegra-usb.c:324: undefined reference to `tegra_ehci_set_phcd'
drivers/built-in.o: In function `utmi_phy_power_on':
drivers/usb/phy/phy-tegra-usb.c:447: undefined reference to `tegra_ehci_set_pts'

This turns the interface into a one-way dependency by letting the tegra ehci
driver pass two function pointers for callbacks that need to be called by
the phy driver.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Venu Byravarasu <vbyravarasu@nvidia.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index ed201ae..e3eddc3 100644 (file)
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -611,7 +611,7 @@ static const struct dev_pm_ops tegra_ehci_pm_ops = {
 /* Bits of PORTSC1, which will get cleared by writing 1 into them */
 #define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
 
-void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
+static void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
 {
        unsigned long val;
        struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
@@ -622,9 +622,8 @@ void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val)
        val |= TEGRA_USB_PORTSC1_PTS(pts_val & 3);
        writel(val, base + TEGRA_USB_PORTSC1);
 }
-EXPORT_SYMBOL_GPL(tegra_ehci_set_pts);
 
-void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
+static void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
 {
        unsigned long val;
        struct usb_hcd *hcd = bus_to_hcd(x->otg->host);
@@ -637,7 +636,6 @@ void tegra_ehci_set_phcd(struct usb_phy *x, bool enable)
                val &= ~TEGRA_USB_PORTSC1_PHCD;
        writel(val, base + TEGRA_USB_PORTSC1);
 }
-EXPORT_SYMBOL_GPL(tegra_ehci_set_phcd);
 
 static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
 
@@ -738,7 +736,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
 
        tegra->phy = tegra_usb_phy_open(&pdev->dev, instance, hcd->regs,
                                        pdata->phy_config,
-                                       TEGRA_USB_PHY_MODE_HOST);
+                                       TEGRA_USB_PHY_MODE_HOST,
+                                       tegra_ehci_set_pts,
+                                       tegra_ehci_set_phcd);
        if (IS_ERR(tegra->phy)) {
                dev_err(&pdev->dev, "Failed to open USB phy\n");
                err = -ENXIO;

diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
index 5487d38..17d8112 100644 (file)
--- a/drivers/usb/phy/phy-tegra-usb.c
+++ b/drivers/usb/phy/phy-tegra-usb.c
@@ -299,7 +299,7 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
                val &= ~USB_SUSP_SET;
                writel(val, base + USB_SUSP_CTRL);
        } else
-               tegra_ehci_set_phcd(&phy->u_phy, true);
+               phy->set_phcd(&phy->u_phy, true);
 
        if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0)
                pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
@@ -321,7 +321,7 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
                val &= ~USB_SUSP_CLR;
                writel(val, base + USB_SUSP_CTRL);
        } else
-               tegra_ehci_set_phcd(&phy->u_phy, false);
+               phy->set_phcd(&phy->u_phy, false);
 
        if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
                                                     USB_PHY_CLK_VALID))
@@ -444,7 +444,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
        utmi_phy_clk_enable(phy);
 
        if (!phy->is_legacy_phy)
-               tegra_ehci_set_pts(&phy->u_phy, 0);
+               phy->set_pts(&phy->u_phy, 0);
 
        return 0;
 }
@@ -688,7 +688,10 @@ static int tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
 }
 
 struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
-       void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
+       void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode,
+       void (*set_pts)(struct usb_phy *x, u8 pts_val),
+       void (*set_phcd)(struct usb_phy *x, bool enable))
+
 {
        struct tegra_usb_phy *phy;
        unsigned long parent_rate;
@@ -707,6 +710,8 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
        phy->dev = dev;
        phy->is_legacy_phy =
                of_property_read_bool(np, "nvidia,has-legacy-mode");
+       phy->set_pts = set_pts;
+       phy->set_phcd = set_phcd;
        err = of_property_match_string(np, "phy_type", "ulpi");
        if (err < 0)
                phy->is_ulpi_phy = false;

diff --git a/include/linux/usb/tegra_usb_phy.h b/include/linux/usb/tegra_usb_phy.h
index 9ebebe9..1b7519a 100644 (file)
--- a/include/linux/usb/tegra_usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -61,10 +61,14 @@ struct tegra_usb_phy {
        struct device *dev;
        bool is_legacy_phy;
        bool is_ulpi_phy;
+       void (*set_pts)(struct usb_phy *x, u8 pts_val);
+       void (*set_phcd)(struct usb_phy *x, bool enable);
 };
 
 struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
-       void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode);
+       void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode,
+       void (*set_pts)(struct usb_phy *x, u8 pts_val),
+       void (*set_phcd)(struct usb_phy *x, bool enable));
 
 void tegra_usb_phy_preresume(struct usb_phy *phy);
 
@@ -75,8 +79,4 @@ void tegra_ehci_phy_restore_start(struct usb_phy *phy,
 
 void tegra_ehci_phy_restore_end(struct usb_phy *phy);
 
-void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val);
-
-void tegra_ehci_set_phcd(struct usb_phy *x, bool enable);
-
 #endif /* __TEGRA_USB_PHY_H */