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Subject[PATCH 1/4] xhci: Introduce xhci_init_driver()
Date
Since the struct hc_driver is mostly the same across the xhci-pci,
xhci-plat, and the upcoming xhci-tegra driver, introduce the function
xhci_init_driver() which will populate the hc_driver with the default
xHCI operations. The caller must supply a setup function which will
be used as the hc_driver's reset callback.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
---
drivers/usb/host/xhci-pci.c | 69 +++++---------------------------------------
drivers/usb/host/xhci-plat.c | 60 +++-----------------------------------
drivers/usb/host/xhci.c | 68 +++++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/xhci.h | 1 +
4 files changed, 80 insertions(+), 118 deletions(-)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index e20520f..97648e4 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -40,6 +40,8 @@

static const char hcd_name[] = "xhci_hcd";

+static struct hc_driver __read_mostly xhci_pci_hc_driver;
+
/* called after powerup, by probe or system-pm "wakeup" */
static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
{
@@ -313,68 +315,6 @@ static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
}
#endif /* CONFIG_PM */

-static const struct hc_driver xhci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "xHCI Host Controller",
- .hcd_priv_size = sizeof(struct xhci_hcd *),
-
- /*
- * generic hardware linkage
- */
- .irq = xhci_irq,
- .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
-
- /*
- * basic lifecycle operations
- */
- .reset = xhci_pci_setup,
- .start = xhci_run,
-#ifdef CONFIG_PM
- .pci_suspend = xhci_pci_suspend,
- .pci_resume = xhci_pci_resume,
-#endif
- .stop = xhci_stop,
- .shutdown = xhci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = xhci_urb_enqueue,
- .urb_dequeue = xhci_urb_dequeue,
- .alloc_dev = xhci_alloc_dev,
- .free_dev = xhci_free_dev,
- .alloc_streams = xhci_alloc_streams,
- .free_streams = xhci_free_streams,
- .add_endpoint = xhci_add_endpoint,
- .drop_endpoint = xhci_drop_endpoint,
- .endpoint_reset = xhci_endpoint_reset,
- .check_bandwidth = xhci_check_bandwidth,
- .reset_bandwidth = xhci_reset_bandwidth,
- .address_device = xhci_address_device,
- .enable_device = xhci_enable_device,
- .update_hub_device = xhci_update_hub_device,
- .reset_device = xhci_discover_or_reset_device,
-
- /*
- * scheduling support
- */
- .get_frame_number = xhci_get_frame,
-
- /* Root hub support */
- .hub_control = xhci_hub_control,
- .hub_status_data = xhci_hub_status_data,
- .bus_suspend = xhci_bus_suspend,
- .bus_resume = xhci_bus_resume,
- /*
- * call back when device connected and addressed
- */
- .update_device = xhci_update_device,
- .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm,
- .enable_usb3_lpm_timeout = xhci_enable_usb3_lpm_timeout,
- .disable_usb3_lpm_timeout = xhci_disable_usb3_lpm_timeout,
- .find_raw_port_number = xhci_find_raw_port_number,
-};
-
/*-------------------------------------------------------------------------*/

/* PCI driver selection metadata; PCI hotplugging uses this */
@@ -406,6 +346,11 @@ static struct pci_driver xhci_pci_driver = {

int __init xhci_register_pci(void)
{
+ xhci_init_driver(&xhci_pci_hc_driver, xhci_pci_setup);
+#ifdef CONFIG_PM
+ xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
+ xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
+#endif
return pci_register_driver(&xhci_pci_driver);
}

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 29d8adb..49799db 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -21,6 +21,8 @@
#include "xhci.h"
#include "xhci-mvebu.h"

+static struct hc_driver __read_mostly xhci_plat_hc_driver;
+
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
/*
@@ -37,61 +39,6 @@ static int xhci_plat_setup(struct usb_hcd *hcd)
return xhci_gen_setup(hcd, xhci_plat_quirks);
}

-static int xhci_plat_start(struct usb_hcd *hcd)
-{
- return xhci_run(hcd);
-}
-
-static const struct hc_driver xhci_plat_xhci_driver = {
- .description = "xhci-hcd",
- .product_desc = "xHCI Host Controller",
- .hcd_priv_size = sizeof(struct xhci_hcd *),
-
- /*
- * generic hardware linkage
- */
- .irq = xhci_irq,
- .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
-
- /*
- * basic lifecycle operations
- */
- .reset = xhci_plat_setup,
- .start = xhci_plat_start,
- .stop = xhci_stop,
- .shutdown = xhci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = xhci_urb_enqueue,
- .urb_dequeue = xhci_urb_dequeue,
- .alloc_dev = xhci_alloc_dev,
- .free_dev = xhci_free_dev,
- .alloc_streams = xhci_alloc_streams,
- .free_streams = xhci_free_streams,
- .add_endpoint = xhci_add_endpoint,
- .drop_endpoint = xhci_drop_endpoint,
- .endpoint_reset = xhci_endpoint_reset,
- .check_bandwidth = xhci_check_bandwidth,
- .reset_bandwidth = xhci_reset_bandwidth,
- .address_device = xhci_address_device,
- .enable_device = xhci_enable_device,
- .update_hub_device = xhci_update_hub_device,
- .reset_device = xhci_discover_or_reset_device,
-
- /*
- * scheduling support
- */
- .get_frame_number = xhci_get_frame,
-
- /* Root hub support */
- .hub_control = xhci_hub_control,
- .hub_status_data = xhci_hub_status_data,
- .bus_suspend = xhci_bus_suspend,
- .bus_resume = xhci_bus_resume,
-};
-
static int xhci_plat_probe(struct platform_device *pdev)
{
const struct hc_driver *driver;
@@ -105,7 +52,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
if (usb_disabled())
return -ENODEV;

- driver = &xhci_plat_xhci_driver;
+ driver = &xhci_plat_hc_driver;

irq = platform_get_irq(pdev, 0);
if (irq < 0)
@@ -288,6 +235,7 @@ MODULE_ALIAS("platform:xhci-hcd");

int xhci_register_plat(void)
{
+ xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup);
return platform_driver_register(&usb_xhci_driver);
}

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 7436d5f..8de75b7 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -4873,6 +4873,74 @@ error:
return retval;
}

+static const struct hc_driver xhci_hc_driver = {
+ .description = "xhci-hcd",
+ .product_desc = "xHCI Host Controller",
+ .hcd_priv_size = sizeof(struct xhci_hcd *),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = xhci_irq,
+ .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = NULL, /* set in xhci_init_driver() */
+ .start = xhci_run,
+ .stop = xhci_stop,
+ .shutdown = xhci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = xhci_urb_enqueue,
+ .urb_dequeue = xhci_urb_dequeue,
+ .alloc_dev = xhci_alloc_dev,
+ .free_dev = xhci_free_dev,
+ .alloc_streams = xhci_alloc_streams,
+ .free_streams = xhci_free_streams,
+ .add_endpoint = xhci_add_endpoint,
+ .drop_endpoint = xhci_drop_endpoint,
+ .endpoint_reset = xhci_endpoint_reset,
+ .check_bandwidth = xhci_check_bandwidth,
+ .reset_bandwidth = xhci_reset_bandwidth,
+ .address_device = xhci_address_device,
+ .enable_device = xhci_enable_device,
+ .update_hub_device = xhci_update_hub_device,
+ .reset_device = xhci_discover_or_reset_device,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = xhci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_control = xhci_hub_control,
+ .hub_status_data = xhci_hub_status_data,
+ .bus_suspend = xhci_bus_suspend,
+ .bus_resume = xhci_bus_resume,
+
+ /*
+ * call back when device connected and addressed
+ */
+ .update_device = xhci_update_device,
+ .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm,
+ .enable_usb3_lpm_timeout = xhci_enable_usb3_lpm_timeout,
+ .disable_usb3_lpm_timeout = xhci_disable_usb3_lpm_timeout,
+ .find_raw_port_number = xhci_find_raw_port_number,
+};
+
+void xhci_init_driver(struct hc_driver *drv, int (*setup_fn)(struct usb_hcd *))
+{
+ *drv = xhci_hc_driver;
+ drv->reset = setup_fn;
+}
+EXPORT_SYMBOL_GPL(xhci_init_driver);
+
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 9ffecd5..0d9b2cf 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1760,6 +1760,7 @@ int xhci_run(struct usb_hcd *hcd);
void xhci_stop(struct usb_hcd *hcd);
void xhci_shutdown(struct usb_hcd *hcd);
int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks);
+void xhci_init_driver(struct hc_driver *drv, int (*setup_fn)(struct usb_hcd *));

#ifdef CONFIG_PM
int xhci_suspend(struct xhci_hcd *xhci);
--
2.0.0.526.g5318336


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