This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
In V2:
-ohci_hcd_init(), ohci_run() and ohci_stop revert back to static routine.
-ohci_setup() and ohci_start() functions written to generic OHCI initialization
for all ohci bus glue.
Signed-off-by: Manjunath Goudar <manjunath.goudar@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
drivers/usb/host/Makefile | 2 +
drivers/usb/host/ohci-hcd.c | 123 +++++++++++++++++++++++++++++++++-----
drivers/usb/host/ohci-pci.c | 2 +-
drivers/usb/host/ohci-platform.c | 2 +-
drivers/usb/host/ohci.h | 30 +++++++++-
5 files changed, 138 insertions(+), 21 deletions(-)
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 58c14c1..a38d76b 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -40,7 +40,9 @@ obj-$(CONFIG_USB_EHCI_TEGRA) +=ehci-tegra.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
+
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
+
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9e6de95..7922c61 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -79,13 +79,7 @@ static const char hcd_name [] = "ohci_hcd";
#include "pci-quirks.h"
static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static int ohci_init (struct ohci_hcd *ohci);
-static void ohci_stop (struct usb_hcd *hcd);
-
-#if defined(CONFIG_PM) || defined(CONFIG_PCI)
-static int ohci_restart (struct ohci_hcd *ohci);
-#endif
-
+static void ohci_stop(struct usb_hcd *hcd);
#ifdef CONFIG_PCI
static void sb800_prefetch(struct ohci_hcd *ohci, int on);
#else
@@ -520,7 +514,7 @@ done:
/* init memory, and kick BIOS/SMM off */
-static int ohci_init (struct ohci_hcd *ohci)
+int ohci_init(struct ohci_hcd *ohci)
{
int ret;
struct usb_hcd *hcd = ohci_to_hcd(ohci);
@@ -590,6 +584,7 @@ static int ohci_init (struct ohci_hcd *ohci)
return ret;
}
+EXPORT_SYMBOL_GPL(ohci_init);
/*-------------------------------------------------------------------------*/
@@ -597,11 +592,11 @@ static int ohci_init (struct ohci_hcd *ohci)
* resets USB and controller
* enable interrupts
*/
-static int ohci_run (struct ohci_hcd *ohci)
+static int ohci_run(struct usb_hcd *hcd)
{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
u32 mask, val;
int first = ohci->fminterval == 0;
- struct usb_hcd *hcd = ohci_to_hcd(ohci);
ohci->rh_state = OHCI_RH_HALTED;
@@ -767,7 +762,37 @@ retry:
return 0;
}
+/*------------------------------------------------------------------------*/
+
+/* ohci generic function for all OHCI bus glue */
+
+static int ohci_setup(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int retval;
+
+ ohci->sbrn = HCD_USB11;
+
+ /* data structure init */
+ retval = ohci_init(ohci);
+ if (retval)
+ return retval;
+ ohci_usb_reset(ohci);
+ return 0;
+}
+static int ohci_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+ ret = ohci_run(hcd);
+ if (ret < 0) {
+ ohci_err(ohci, "can't start\n");
+ ohci_stop(hcd);
+ }
+ return ret;
+}
+/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
@@ -949,11 +974,12 @@ static void ohci_stop (struct usb_hcd *hcd)
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
/* must not be called from interrupt context */
-static int ohci_restart (struct ohci_hcd *ohci)
+int ohci_restart(struct ohci_hcd *ohci)
{
int temp;
int i;
struct urb_priv *priv;
+ struct usb_hcd *hcd;
spin_lock_irq(&ohci->lock);
ohci->rh_state = OHCI_RH_HALTED;
@@ -1001,19 +1027,22 @@ static int ohci_restart (struct ohci_hcd *ohci)
ohci->ed_controltail = NULL;
ohci->ed_bulktail = NULL;
- if ((temp = ohci_run (ohci)) < 0) {
- ohci_err (ohci, "can't restart, %d\n", temp);
+ hcd = ohci_to_hcd(ohci);
+ temp = ohci_run(hcd);
+ if (temp < 0) {
+ ohci_err(ohci, "can't restart, %d\n", temp);
return temp;
}
ohci_dbg(ohci, "restart complete\n");
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_restart);
#endif
#ifdef CONFIG_PM
-static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
@@ -1031,9 +1060,9 @@ static int __maybe_unused ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_suspend);
-
-static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
+int ohci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int port;
@@ -1081,11 +1110,73 @@ static int __maybe_unused ohci_resume(struct usb_hcd *hcd, bool hibernated)
return 0;
}
+EXPORT_SYMBOL_GPL(ohci_resume);
#endif
/*-------------------------------------------------------------------------*/
+/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+
+static const struct hc_driver ohci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "OHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_MEMORY | HCD_USB11,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ohci_setup,
+ .start = ohci_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+ .start_port_reset = ohci_start_port_reset,
+};
+
+void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ohci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+EXPORT_SYMBOL_GPL(ohci_init_driver);
+
+/*-------------------------------------------------------------------------*/
+
MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE ("GPL");
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 951514e..0b34b59 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -288,7 +288,7 @@ static int ohci_pci_start (struct usb_hcd *hcd)
}
#endif /* CONFIG_PM */
- ret = ohci_run (ohci);
+ ret = ohci_run(hcd);
if (ret < 0) {
ohci_err (ohci, "can't start\n");
ohci_stop (hcd);
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index c3e7287..545c657 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -46,7 +46,7 @@ static int ohci_platform_start(struct usb_hcd *hcd)
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int err;
- err = ohci_run(ohci);
+ err = ohci_run(hcd);
if (err < 0) {
ohci_err(ohci, "can't start\n");
ohci_stop(hcd);
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d329914..455e9b1 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -357,7 +357,6 @@ struct ohci_hcd {
* I/O memory used to communicate with the HC (dma-consistent)
*/
struct ohci_regs __iomem *regs;
-
/*
* main memory used to communicate with the HC (dma-consistent).
* hcd adds to schedule for a live hc any time, but removals finish
@@ -373,7 +372,6 @@ struct ohci_hcd {
struct ed *periodic [NUM_INTS]; /* shadow int_table */
void (*start_hnp)(struct ohci_hcd *ohci);
-
/*
* memory management for queue data structures
*/
@@ -392,7 +390,7 @@ struct ohci_hcd {
unsigned long next_statechange; /* suspend/resume */
u32 fminterval; /* saved register */
unsigned autostop:1; /* rh auto stopping/stopped */
-
+ u8 sbrn;
unsigned long flags; /* for HC bugs */
#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
#define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */
@@ -718,3 +716,29 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
{ return ohci_readl (hc, &hc->regs->roothub.status); }
static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ohci_init_driver(struct hc_driver *drv,
+ const struct ohci_driver_overrides *over);
+extern int ohci_init(struct ohci_hcd *ohci);
+extern int ohci_restart(struct ohci_hcd *ohci);
+#ifdef CONFIG_PM
+extern int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#else
+static inline int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+{
+ return 0;
+}
+static inline int ohci_resume(struct usb_hcd *hcd, bool hibernated)
+{
+ return 0;
+}
+#endif
--
1.7.9.5
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