This patch allow to register specific glue code for xhci controller.
It creates a structure called xhci_plat_ops to register functions
specific to an SoC. Currently there are only probe() and remove() but
it can be extended later, it was the point to create such a structure.
Each compatible string can then be associated to an instance of this
structure. In the non device tree case a default structure is used.
Signed-off-by: Gregory CLEMENT <gregory.clem...@free-electrons.com>
---
drivers/usb/host/xhci-plat.c | 72 +++++++++++++++++++++++++++++++++++++++++---
drivers/usb/host/xhci.h | 4 +++
2 files changed, 72 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 151901ce1ba9..8029cc82edc4 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
#include "xhci.h"
@@ -85,7 +86,7 @@ static const struct hc_driver xhci_plat_xhci_driver = {
.bus_resume = xhci_bus_resume,
};
-static int xhci_plat_probe(struct platform_device *pdev)
+int common_xhci_plat_probe(struct platform_device *pdev, void *priv)
{
const struct hc_driver *driver;
struct xhci_hcd *xhci;
@@ -145,6 +146,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
/* USB 2.0 roothub is stored in the platform_device now. */
hcd = platform_get_drvdata(pdev);
xhci = hcd_to_xhci(hcd);
+ xhci->priv = priv;
xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
dev_name(&pdev->dev), hcd);
if (!xhci->shared_hcd) {
@@ -185,7 +187,7 @@ put_hcd:
return ret;
}
-static int xhci_plat_remove(struct platform_device *dev)
+int common_xhci_plat_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
@@ -202,6 +204,26 @@ static int xhci_plat_remove(struct platform_device *dev)
return 0;
}
+static int default_xhci_plat_probe(struct platform_device *pdev)
+{
+ return common_xhci_plat_probe(pdev, NULL);
+}
+
+static int default_xhci_plat_remove(struct platform_device *pdev)
+{
+ return common_xhci_plat_remove(pdev);
+}
+
+struct xhci_plat_ops {
+ int (*probe)(struct platform_device *);
+ int (*remove)(struct platform_device *);
+};
+
+static struct xhci_plat_ops xhci_plat_default = {
+ .probe = default_xhci_plat_probe,
+ .remove = default_xhci_plat_remove,
+};
+
#ifdef CONFIG_PM
static int xhci_plat_suspend(struct device *dev)
{
@@ -229,13 +251,55 @@ static const struct dev_pm_ops xhci_plat_pm_ops = {
#ifdef CONFIG_OF
static const struct of_device_id usb_xhci_of_match[] = {
- { .compatible = "generic-xhci" },
- { .compatible = "xhci-platform" },
+ {
+ .compatible = "generic-xhci",
+ .data = (void *) &xhci_plat_default,
+ },
+ {
+ .compatible = "xhci-platform",
+ .data = (void *) &xhci_plat_default,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif
+static int xhci_plat_probe(struct platform_device *pdev)
+{
+ const struct xhci_plat_ops *plat_of = &xhci_plat_default;
+
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match =
+ of_match_device(usb_xhci_of_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+ plat_of = match->data;
+ }
+
+ if (!plat_of || !plat_of->probe)
+ return -ENODEV;
+
+ return plat_of->probe(pdev);
+}
+
+static int xhci_plat_remove(struct platform_device *pdev)
+{
+ const struct xhci_plat_ops *plat_of = &xhci_plat_default;
+
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match =
+ of_match_device(usb_xhci_of_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+ plat_of = match->data;
+ }
+
+ if (!plat_of || !plat_of->remove)
+ return -ENODEV;
+
+ return plat_of->remove(pdev);
+}
+
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index d280e9213d08..96dd3df3dd8c 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1461,6 +1461,7 @@ struct xhci_hcd {
__u32 hcc_params;
spinlock_t lock;
+ void *priv;
/* packed release number */
u8 sbrn;
@@ -1597,6 +1598,9 @@ static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd
*xhci)
return xhci->main_hcd;
}
+int common_xhci_plat_probe(struct platform_device *pdev, void *priv);
+int common_xhci_plat_remove(struct platform_device *dev);
+
#define xhci_dbg(xhci, fmt, args...) \
dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
#define xhci_err(xhci, fmt, args...) \
--
1.8.1.2
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
