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Message-Id: <201304232105.40254.arnd@arndb.de>
Date: Tue, 23 Apr 2013 21:05:40 +0200
From: Arnd Bergmann <arnd@...db.de>
To: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Venu Byravarasu <vbyravarasu@...dia.com>,
Alan Stern <stern@...land.harvard.edu>,
Felipe Balbi <balbi@...com>,
Stephen Warren <swarren@...dia.com>, linux-usb@...r.kernel.org
Subject: [PATCH v2] 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@...db.de>
Cc: Venu Byravarasu <vbyravarasu@...dia.com>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: Felipe Balbi <balbi@...com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Stephen Warren <swarren@...dia.com>
Cc: linux-usb@...r.kernel.org
---
On Tuesday 23 April 2013, Greg Kroah-Hartman wrote:
> > drivers/usb/host/ehci-tegra.c | 10 +++++-----
> > drivers/usb/phy/tegra_usb_phy.c | 13 +++++++++----
> > include/linux/usb/tegra_usb_phy.h | 10 +++++-----
> > 3 files changed, 19 insertions(+), 14 deletions(-)
>
> Not all of these files are in my usb-next tree, so I can't take this
> patch, sorry.
Right. I created the patch again linux-next but then rebased the series
to 3.9-rc8 for submission. I had not realized that the files got renamed
between the trees.
Arnd
drivers/usb/host/ehci-tegra.c | 10 +++++-----
drivers/usb/phy/phy-tegra-usb.c | 13 +++++++++----
include/linux/usb/tegra_usb_phy.h | 10 +++++-----
3 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index ed201ae..e3eddc3 100644
--- 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
--- 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
--- 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 */
--
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