Separate the Samsung OHCI EXYNOS 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;
however, note that other changes are still needed before EXYNOS can
be booted with a multi-platform kernel. We currently expect those
to get merged for 3.11.
Signed-off-by: Manjunath Goudar <manjunath.gou...@linaro.org>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Jingoo Han <jg1....@samsung.com>
Cc: Kukjin Kim <kgene....@samsung.com>
Cc: Greg KH <g...@kroah.com>
Cc: Alan Stern <st...@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
---
drivers/usb/host/Kconfig | 2 +-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-exynos.c | 140 +++++++++++++++++++-------------------
drivers/usb/host/ohci-hcd.c | 5 --
drivers/usb/host/ohci-platform.c | 2 +-
5 files changed, 72 insertions(+), 78 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index bbf1907..42ce228 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -445,7 +445,7 @@ config USB_OHCI_SH
If you use the PCI OHCI controller, this option is not necessary.
config USB_OHCI_EXYNOS
- boolean "OHCI support for Samsung EXYNOS SoC Series"
+ tristate "OHCI support for Samsung EXYNOS SoC Series"
depends on USB_OHCI_HCD && ARCH_EXYNOS
help
Enable support for the Samsung Exynos SOC's on-chip OHCI controller.
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index a20a8d9..f148671 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
obj-$(CONFIG_USB_OHCI_PCI) += ohci-pci.o
+obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index e3b7e85..59d6e23 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -12,25 +12,39 @@
*/
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/platform_data/usb-exynos.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
#include <linux/usb/phy.h>
#include <linux/usb/samsung_usb_phy.h>
+#include <linux/usb/otg.h>
#include <plat/usb-phy.h>
+#include "ohci.h"
+
+#define DRIVER_DESC "OHCI exynos driver"
+
+static const char hcd_name[] = "ohci-exynos";
+static struct hc_driver __read_mostly exynos_ohci_hc_driver;
+
+#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
+
struct exynos_ohci_hcd {
- struct device *dev;
- struct usb_hcd *hcd;
struct clk *clk;
struct usb_phy *phy;
struct usb_otg *otg;
struct exynos4_ohci_platdata *pdata;
};
-static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci)
+static void exynos_ohci_phy_enable(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
+ struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
if (exynos_ohci->phy)
usb_phy_init(exynos_ohci->phy);
@@ -38,9 +52,9 @@ static void exynos_ohci_phy_enable(struct exynos_ohci_hcd
*exynos_ohci)
exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
}
-static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci)
+static void exynos_ohci_phy_disable(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
+ struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
if (exynos_ohci->phy)
usb_phy_shutdown(exynos_ohci->phy);
@@ -60,7 +74,7 @@ static int ohci_exynos_start(struct usb_hcd *hcd)
ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci);
- ret = ohci_run(ohci);
+ ret = ohci_run(hcd);
if (ret < 0) {
dev_err(hcd->self.controller, "can't start %s\n",
hcd->self.bus_name);
@@ -71,34 +85,6 @@ static int ohci_exynos_start(struct usb_hcd *hcd)
return 0;
}
-static const struct hc_driver exynos_ohci_hc_driver = {
- .description = hcd_name,
- .product_desc = "EXYNOS OHCI Host Controller",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- .irq = ohci_irq,
- .flags = HCD_MEMORY|HCD_USB11,
-
- .reset = ohci_exynos_reset,
- .start = ohci_exynos_start,
- .stop = ohci_stop,
- .shutdown = ohci_shutdown,
-
- .get_frame_number = ohci_get_frame,
-
- .urb_enqueue = ohci_urb_enqueue,
- .urb_dequeue = ohci_urb_dequeue,
- .endpoint_disable = ohci_endpoint_disable,
-
- .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 u64 ohci_exynos_dma_mask = DMA_BIT_MASK(32);
static int exynos_ohci_probe(struct platform_device *pdev)
@@ -122,11 +108,13 @@ static int exynos_ohci_probe(struct platform_device *pdev)
if (!pdev->dev.coherent_dma_mask)
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd),
- GFP_KERNEL);
- if (!exynos_ohci)
+ hcd = usb_create_hcd(&exynos_ohci_hc_driver,
+ &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd) {
+ dev_err(&pdev->dev, "Unable to create HCD\n");
return -ENOMEM;
-
+ }
+ exynos_ohci = to_exynos_ohci(hcd);
phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
if (IS_ERR_OR_NULL(phy)) {
/* Fallback to pdata */
@@ -141,16 +129,6 @@ static int exynos_ohci_probe(struct platform_device *pdev)
exynos_ohci->otg = phy->otg;
}
- exynos_ohci->dev = &pdev->dev;
-
- hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
- dev_name(&pdev->dev));
- if (!hcd) {
- dev_err(&pdev->dev, "Unable to create HCD\n");
- return -ENOMEM;
- }
-
- exynos_ohci->hcd = hcd;
exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
if (IS_ERR(exynos_ohci->clk)) {
@@ -187,10 +165,9 @@ static int exynos_ohci_probe(struct platform_device *pdev)
}
if (exynos_ohci->otg)
- exynos_ohci->otg->set_host(exynos_ohci->otg,
- &exynos_ohci->hcd->self);
+ exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci);
+ exynos_ohci_phy_enable(pdev);
ohci = hcd_to_ohci(hcd);
ohci_hcd_init(ohci);
@@ -201,12 +178,12 @@ static int exynos_ohci_probe(struct platform_device *pdev)
goto fail_add_hcd;
}
- platform_set_drvdata(pdev, exynos_ohci);
+ platform_set_drvdata(pdev, hcd);
return 0;
fail_add_hcd:
- exynos_ohci_phy_disable(exynos_ohci);
+ exynos_ohci_phy_disable(pdev);
fail_io:
clk_disable_unprepare(exynos_ohci->clk);
fail_clk:
@@ -216,16 +193,15 @@ fail_clk:
static int exynos_ohci_remove(struct platform_device *pdev)
{
- struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
- struct usb_hcd *hcd = exynos_ohci->hcd;
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
usb_remove_hcd(hcd);
if (exynos_ohci->otg)
- exynos_ohci->otg->set_host(exynos_ohci->otg,
- &exynos_ohci->hcd->self);
+ exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci);
+ exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -236,8 +212,7 @@ static int exynos_ohci_remove(struct platform_device *pdev)
static void exynos_ohci_shutdown(struct platform_device *pdev)
{
- struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
- struct usb_hcd *hcd = exynos_ohci->hcd;
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
@@ -246,9 +221,10 @@ static void exynos_ohci_shutdown(struct platform_device
*pdev)
#ifdef CONFIG_PM
static int exynos_ohci_suspend(struct device *dev)
{
- struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
- struct usb_hcd *hcd = exynos_ohci->hcd;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ struct platform_device *pdev = to_platform_device(dev);
unsigned long flags;
int rc = 0;
@@ -268,10 +244,9 @@ static int exynos_ohci_suspend(struct device *dev)
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
if (exynos_ohci->otg)
- exynos_ohci->otg->set_host(exynos_ohci->otg,
- &exynos_ohci->hcd->self);
+ exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci);
+ exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -283,16 +258,16 @@ fail:
static int exynos_ohci_resume(struct device *dev)
{
- struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
- struct usb_hcd *hcd = exynos_ohci->hcd;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
+ struct platform_device *pdev = to_platform_device(dev);
clk_prepare_enable(exynos_ohci->clk);
if (exynos_ohci->otg)
- exynos_ohci->otg->set_host(exynos_ohci->otg,
- &exynos_ohci->hcd->self);
+ exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci);
+ exynos_ohci_phy_enable(pdev);
ohci_resume(hcd, false);
@@ -303,6 +278,12 @@ static int exynos_ohci_resume(struct device *dev)
#define exynos_ohci_resume NULL
#endif
+static const struct ohci_driver_overrides exynos_overrides = {
+ .extra_priv_size = sizeof(struct exynos_ohci_hcd),
+ .reset = ohci_exynos_reset,
+ .start = ohci_exynos_start,
+};
+
static const struct dev_pm_ops exynos_ohci_pm_ops = {
.suspend = exynos_ohci_suspend,
.resume = exynos_ohci_resume,
@@ -327,6 +308,23 @@ static struct platform_driver exynos_ohci_driver = {
.of_match_table = of_match_ptr(exynos_ohci_match),
}
};
+static int __init ehci_exynos_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+ ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides);
+ return platform_driver_register(&exynos_ohci_driver);
+}
+module_init(ehci_exynos_init);
+
+static void __exit ehci_exynos_cleanup(void)
+{
+ platform_driver_unregister(&exynos_ohci_driver);
+}
+module_exit(ehci_exynos_cleanup);
MODULE_ALIAS("platform:exynos-ohci");
MODULE_AUTHOR("Jingoo Han <jg1....@samsung.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 3d624c2..8881e1a 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1152,11 +1152,6 @@ MODULE_LICENSE ("GPL");
#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver
#endif
-#ifdef CONFIG_USB_OHCI_EXYNOS
-#include "ohci-exynos.c"
-#define EXYNOS_PLATFORM_DRIVER exynos_ohci_driver
-#endif
-
#ifdef CONFIG_USB_OHCI_HCD_OMAP1
#include "ohci-omap.c"
#define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver
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);
--
1.7.9.5
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