Separate the OHCI pxa27x/pxa3xx host controller driver from
ohci-hcd host code so that it can be built as a separate driver
module. This work is part of enabling multi-platform kernels on
ARM.
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
V2:
-Changed ohci_hcd and pxa27x_ohci struct variable names.
1 ohci_hcd struct variable name is ohci.
2 pxa27x_ohci struct variable name is pxa_ohci.
V3:
-Rewrite the macro definition of to_pxa27x_ohci.
-clk_put() function has been called before usb_put_hcd().
---
drivers/usb/host/Kconfig | 8 ++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-hcd.c | 5 -
drivers/usb/host/ohci-pxa27x.c | 242 ++++++++++++++++++----------------------
4 files changed, 115 insertions(+), 141 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index cdfaa04..0d7ee36 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -422,6 +422,14 @@ config USB_OHCI_HCD_EP93XX
Enables support for the on-chip OHCI controller on
EP93XX chips.
+config USB_OHCI_HCD_PXA27X
+ tristate "Support for PXA27X/PXA3XX on-chip OHCI USB controller"
+ depends on USB_OHCI_HCD && (PXA27x || PXA3xx)
+ default y
+ ---help---
+ Enables support for the on-chip OHCI controller on
+ PXA27x/PXA3xx chips.
+
config USB_OHCI_HCD_AT91
tristate "Support for Atmel on-chip OHCI USB controller"
depends on USB_OHCI_HCD && ARCH_AT91
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 3fee3ea..8b7fa89 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_USB_OHCI_HCD_S3CXXXX) += ohci-s3c2410.o
obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o
obj-$(CONFIG_USB_OHCI_HCD_DA8XX) += ohci-da8xx.o
obj-$(CONFIG_USB_OHCI_HCD_EP93XX) += ohci-ep93xx.o
+obj-$(CONFIG_USB_OHCI_HCD_PXA27X) += ohci-pxa27x.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 3f46cff..f601dde 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1184,11 +1184,6 @@ MODULE_LICENSE ("GPL");
#define SA1111_DRIVER ohci_hcd_sa1111_driver
#endif
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
-#include "ohci-pxa27x.c"
-#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
-#endif
-
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF
#include "ohci-ppc-of.c"
#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 5fb91f1..394f221 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -19,15 +19,26 @@
* This file is licenced under the GPL.
*/
-#include <linux/device.h>
-#include <linux/signal.h>
-#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
-#include <mach/hardware.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include <linux/platform_data/usb-pxa3xx-ulpi.h>
+#include <linux/platform_device.h>
+#include <linux/signal.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/otg.h>
+
+#include <mach/hardware.h>
+
+#include "ohci.h"
+
+#define DRIVER_DESC "OHCI PXA27x/PXA3x driver"
/*
* UHC: USB Host Controller (OHCI-like) register definitions
@@ -101,16 +112,16 @@
#define PXA_UHC_MAX_PORTNUM 3
-struct pxa27x_ohci {
- /* must be 1st member here for hcd_to_ohci() to work */
- struct ohci_hcd ohci;
+static const char hcd_name[] = "ohci-pxa27x";
+
+static struct hc_driver __read_mostly ohci_pxa27x_hc_driver;
- struct device *dev;
+struct pxa27x_ohci {
struct clk *clk;
void __iomem *mmio_base;
};
-#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)hcd_to_ohci(hcd)
+#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)(hcd_to_ohci(hcd)->priv)
/*
PMM_NPS_MODE -- PMM Non-power switching mode
@@ -122,10 +133,10 @@ struct pxa27x_ohci {
PMM_PERPORT_MODE -- PMM per port switching mode
Ports are powered individually.
*/
-static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *ohci, int mode)
+static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *pxa_ohci, int mode)
{
- uint32_t uhcrhda = __raw_readl(ohci->mmio_base + UHCRHDA);
- uint32_t uhcrhdb = __raw_readl(ohci->mmio_base + UHCRHDB);
+ uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
+ uint32_t uhcrhdb = __raw_readl(pxa_ohci->mmio_base + UHCRHDB);
switch (mode) {
case PMM_NPS_MODE:
@@ -149,20 +160,18 @@ static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *ohci, int mode)
uhcrhda |= RH_A_NPS;
}
- __raw_writel(uhcrhda, ohci->mmio_base + UHCRHDA);
- __raw_writel(uhcrhdb, ohci->mmio_base + UHCRHDB);
+ __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
+ __raw_writel(uhcrhdb, pxa_ohci->mmio_base + UHCRHDB);
return 0;
}
-extern int usb_disabled(void);
-
/*-------------------------------------------------------------------------*/
-static inline void pxa27x_setup_hc(struct pxa27x_ohci *ohci,
+static inline void pxa27x_setup_hc(struct pxa27x_ohci *pxa_ohci,
struct pxaohci_platform_data *inf)
{
- uint32_t uhchr = __raw_readl(ohci->mmio_base + UHCHR);
- uint32_t uhcrhda = __raw_readl(ohci->mmio_base + UHCRHDA);
+ uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
+ uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
if (inf->flags & ENABLE_PORT1)
uhchr &= ~UHCHR_SSEP1;
@@ -194,17 +203,17 @@ static inline void pxa27x_setup_hc(struct pxa27x_ohci *ohci,
uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2);
}
- __raw_writel(uhchr, ohci->mmio_base + UHCHR);
- __raw_writel(uhcrhda, ohci->mmio_base + UHCRHDA);
+ __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
+ __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
}
-static inline void pxa27x_reset_hc(struct pxa27x_ohci *ohci)
+static inline void pxa27x_reset_hc(struct pxa27x_ohci *pxa_ohci)
{
- uint32_t uhchr = __raw_readl(ohci->mmio_base + UHCHR);
+ uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
- __raw_writel(uhchr | UHCHR_FHR, ohci->mmio_base + UHCHR);
+ __raw_writel(uhchr | UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
udelay(11);
- __raw_writel(uhchr & ~UHCHR_FHR, ohci->mmio_base + UHCHR);
+ __raw_writel(uhchr & ~UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
}
#ifdef CONFIG_PXA27x
@@ -213,25 +222,26 @@ extern void pxa27x_clear_otgph(void);
#define pxa27x_clear_otgph() do {} while (0)
#endif
-static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
+static int pxa27x_start_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
{
int retval = 0;
struct pxaohci_platform_data *inf;
uint32_t uhchr;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
inf = dev->platform_data;
- clk_prepare_enable(ohci->clk);
+ clk_prepare_enable(pxa_ohci->clk);
- pxa27x_reset_hc(ohci);
+ pxa27x_reset_hc(pxa_ohci);
- uhchr = __raw_readl(ohci->mmio_base + UHCHR) | UHCHR_FSBIR;
- __raw_writel(uhchr, ohci->mmio_base + UHCHR);
+ uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) | UHCHR_FSBIR;
+ __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
- while (__raw_readl(ohci->mmio_base + UHCHR) & UHCHR_FSBIR)
+ while (__raw_readl(pxa_ohci->mmio_base + UHCHR) & UHCHR_FSBIR)
cpu_relax();
- pxa27x_setup_hc(ohci, inf);
+ pxa27x_setup_hc(pxa_ohci, inf);
if (inf->init)
retval = inf->init(dev);
@@ -240,38 +250,39 @@ static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
return retval;
if (cpu_is_pxa3xx())
- pxa3xx_u2d_start_hc(&ohci_to_hcd(&ohci->ohci)->self);
+ pxa3xx_u2d_start_hc(&hcd->self);
- uhchr = __raw_readl(ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
- __raw_writel(uhchr, ohci->mmio_base + UHCHR);
- __raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, ohci->mmio_base + UHCHIE);
+ uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
+ __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
+ __raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, pxa_ohci->mmio_base + UHCHIE);
/* Clear any OTG Pin Hold */
pxa27x_clear_otgph();
return 0;
}
-static void pxa27x_stop_hc(struct pxa27x_ohci *ohci, struct device *dev)
+static void pxa27x_stop_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
{
struct pxaohci_platform_data *inf;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
uint32_t uhccoms;
inf = dev->platform_data;
if (cpu_is_pxa3xx())
- pxa3xx_u2d_stop_hc(&ohci_to_hcd(&ohci->ohci)->self);
+ pxa3xx_u2d_stop_hc(&hcd->self);
if (inf->exit)
inf->exit(dev);
- pxa27x_reset_hc(ohci);
+ pxa27x_reset_hc(pxa_ohci);
/* Host Controller Reset */
- uhccoms = __raw_readl(ohci->mmio_base + UHCCOMS) | 0x01;
- __raw_writel(uhccoms, ohci->mmio_base + UHCCOMS);
+ uhccoms = __raw_readl(pxa_ohci->mmio_base + UHCCOMS) | 0x01;
+ __raw_writel(uhccoms, pxa_ohci->mmio_base + UHCCOMS);
udelay(10);
- clk_disable_unprepare(ohci->clk);
+ clk_disable_unprepare(pxa_ohci->clk);
}
#ifdef CONFIG_OF
@@ -356,7 +367,8 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
int retval, irq;
struct usb_hcd *hcd;
struct pxaohci_platform_data *inf;
- struct pxa27x_ohci *ohci;
+ struct pxa27x_ohci *pxa_ohci;
+ struct ohci_hcd *ohci;
struct resource *r;
struct clk *usb_clk;
@@ -409,29 +421,31 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
}
/* initialize "struct pxa27x_ohci" */
- ohci = (struct pxa27x_ohci *)hcd_to_ohci(hcd);
- ohci->dev = &pdev->dev;
- ohci->clk = usb_clk;
- ohci->mmio_base = (void __iomem *)hcd->regs;
+ pxa_ohci = to_pxa27x_ohci(hcd);
+ pxa_ohci->clk = usb_clk;
+ pxa_ohci->mmio_base = (void __iomem *)hcd->regs;
- if ((retval = pxa27x_start_hc(ohci, &pdev->dev)) < 0) {
+ retval = pxa27x_start_hc(pxa_ohci, &pdev->dev);
+ if (retval < 0) {
pr_debug("pxa27x_start_hc failed");
goto err3;
}
/* Select Power Management Mode */
- pxa27x_ohci_select_pmm(ohci, inf->port_mode);
+ pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
if (inf->power_budget)
hcd->power_budget = inf->power_budget;
- ohci_hcd_init(hcd_to_ohci(hcd));
+ /* The value of NDP in roothub_a is incorrect on this hardware */
+ ohci = hcd_to_ohci(hcd);
+ ohci->num_ports = 3;
retval = usb_add_hcd(hcd, irq, 0);
if (retval == 0)
return retval;
- pxa27x_stop_hc(ohci, &pdev->dev);
+ pxa27x_stop_hc(pxa_ohci, &pdev->dev);
err3:
iounmap(hcd->regs);
err2:
@@ -459,88 +473,18 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
*/
void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
{
- struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
+ struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
usb_remove_hcd(hcd);
- pxa27x_stop_hc(ohci, &pdev->dev);
+ pxa27x_stop_hc(pxa_ohci, &pdev->dev);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ clk_put(pxa_ohci->clk);
usb_put_hcd(hcd);
- clk_put(ohci->clk);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int
-ohci_pxa27x_start (struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
- ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
-
- /* The value of NDP in roothub_a is incorrect on this hardware */
- ohci->num_ports = 3;
-
- if ((ret = ohci_init(ohci)) < 0)
- return ret;
-
- if ((ret = ohci_run (ohci)) < 0) {
- dev_err(hcd->self.controller, "can't start %s",
- hcd->self.bus_name);
- ohci_stop (hcd);
- return ret;
- }
-
- return 0;
}
/*-------------------------------------------------------------------------*/
-static const struct hc_driver ohci_pxa27x_hc_driver = {
- .description = hcd_name,
- .product_desc = "PXA27x OHCI",
- .hcd_priv_size = sizeof(struct pxa27x_ohci),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_USB11 | HCD_MEMORY,
-
- /*
- * basic lifecycle operations
- */
- .start = ohci_pxa27x_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,
-#ifdef CONFIG_PM
- .bus_suspend = ohci_bus_suspend,
- .bus_resume = ohci_bus_resume,
-#endif
- .start_port_reset = ohci_start_port_reset,
-};
-
-/*-------------------------------------------------------------------------*/
-
static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
{
pr_debug ("In ohci_hcd_pxa27x_drv_probe");
@@ -563,38 +507,43 @@ static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
+ struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
bool do_wakeup = device_may_wakeup(dev);
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
- if (time_before(jiffies, ohci->ohci.next_statechange))
+ if (time_before(jiffies, ohci->next_statechange))
msleep(5);
- ohci->ohci.next_statechange = jiffies;
+
+ ohci->next_statechange = jiffies;
ret = ohci_suspend(hcd, do_wakeup);
if (ret)
return ret;
- pxa27x_stop_hc(ohci, dev);
+ pxa27x_stop_hc(pxa_ohci, dev);
return ret;
}
static int ohci_hcd_pxa27x_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
+ struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
struct pxaohci_platform_data *inf = dev->platform_data;
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int status;
- if (time_before(jiffies, ohci->ohci.next_statechange))
+ if (time_before(jiffies, ohci->next_statechange))
msleep(5);
- ohci->ohci.next_statechange = jiffies;
- if ((status = pxa27x_start_hc(ohci, dev)) < 0)
+ ohci->next_statechange = jiffies;
+
+ status = pxa27x_start_hc(pxa_ohci, dev);
+ if (status < 0)
return status;
/* Select Power Management Mode */
- pxa27x_ohci_select_pmm(ohci, inf->port_mode);
+ pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
ohci_resume(hcd, false);
return 0;
@@ -606,9 +555,6 @@ static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = {
};
#endif
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:pxa27x-ohci");
-
static struct platform_driver ohci_hcd_pxa27x_driver = {
.probe = ohci_hcd_pxa27x_drv_probe,
.remove = ohci_hcd_pxa27x_drv_remove,
@@ -623,3 +569,27 @@ static struct platform_driver ohci_hcd_pxa27x_driver = {
},
};
+static const struct ohci_driver_overrides pxa27x_overrides __initconst = {
+ .extra_priv_size = sizeof(struct pxa27x_ohci),
+};
+
+static int __init ohci_pxa27x_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+ ohci_init_driver(&ohci_pxa27x_hc_driver, &pxa27x_overrides);
+ return platform_driver_register(&ohci_hcd_pxa27x_driver);
+}
+module_init(ohci_pxa27x_init);
+
+static void __exit ohci_pxa27x_cleanup(void)
+{
+ platform_driver_unregister(&ohci_hcd_pxa27x_driver);
+}
+module_exit(ohci_pxa27x_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa27x-ohci");
--
1.7.9.5
--
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