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Message-Id: <1364507705-22012-7-git-send-email-arnd@arndb.de>
Date: Thu, 28 Mar 2013 22:55:04 +0100
From: Arnd Bergmann <arnd@...db.de>
To: Alan Stern <stern@...land.harvard.edu>
Cc: linux-usb@...r.kernel.org,
Manjunath Goudar <manjunath.goudar@...aro.org>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Greg KH <greg@...ah.com>, David Brown <davidb@...eaurora.org>,
Daniel Walker <dwalker@...o99.com>,
Bryan Huntsman <bryanh@...eaurora.org>,
Brian Swetland <swetland@...gle.com>,
Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v3 6/7] USB: EHCI: make ehci-msm a separate driver
From: Manjunath Goudar <manjunath.goudar@...aro.org>
Separate the Qualcomm QSD/MSM on-chip host controller driver from
ehci-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 Qualcomm QSD/MSM
can be booted with a multi-platform kernel, which is not expected before
3.11.
With the infrastructure added by Alan Stern in patch 3e0232039
"USB: EHCI: prepare to make ehci-hcd a library module", we can
avoid this problem by turning a bus glue into a separate
module, as we do here for the msm bus glue.
In V3:
1.Detail commit message added here,why this patch is required.
2.Arranged #include's in alphabetical order.
3.drive.name initialized hcd_name[] = "ehci-msm" in platform_driver structure initialization
instead of "msm-ehci",that is reason it was breaking in EHCI USB testing.this one fixed in V3.
In V2:
Tegra patch related changes removed from this patch.
Signed-off-by: Manjunath Goudar <manjunath.goudar@...aro.org>
Cc: Greg KH <greg@...ah.com>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: David Brown <davidb@...eaurora.org>
Cc: Daniel Walker <dwalker@...o99.com>
Cc: Bryan Huntsman <bryanh@...eaurora.org>
Cc: Brian Swetland <swetland@...gle.com>
Cc: linux-usb@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
drivers/usb/host/Kconfig | 2 +-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-hcd.c | 6 +---
drivers/usb/host/ehci-msm.c | 85 ++++++++++++++++++++-------------------------
4 files changed, 40 insertions(+), 54 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 8c564aa..35a5d3b 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -190,7 +190,7 @@ config USB_EHCI_HCD_AT91
Atmel chips.
config USB_EHCI_MSM
- bool "Support for MSM on-chip EHCI USB controller"
+ tristate "Support for Qualcomm QSD/MSM on-chip EHCI USB controller"
depends on USB_EHCI_HCD && ARCH_MSM
select USB_EHCI_ROOT_HUB_TT
select USB_MSM_OTG
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 368d3eb..4fb73c1 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_USB_EHCI_HCD_ORION) += ehci-orion.o
obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o
obj-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o
obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
+obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index efc641c..d5c4ae8 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1260,11 +1260,6 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_octeon_driver
#endif
-#ifdef CONFIG_USB_EHCI_MSM
-#include "ehci-msm.c"
-#define PLATFORM_DRIVER ehci_msm_driver
-#endif
-
#ifdef CONFIG_TILE_USB
#include "ehci-tilegx.c"
#define PLATFORM_DRIVER ehci_hcd_tilegx_driver
@@ -1304,6 +1299,7 @@ MODULE_LICENSE ("GPL");
!IS_ENABLED(CONFIG_USB_EHCI_HCD_SPEAR) && \
!IS_ENABLED(CONFIG_USB_EHCI_S5P) && \
!IS_ENABLED(CONFIG_USB_EHCI_HCD_AT91) && \
+ !IS_ENABLED(CONFIG_USB_EHCI_MSM) && \
!defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER) && \
!defined(OF_PLATFORM_DRIVER) && \
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index 88a49c8..3b45f0c 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -22,16 +22,26 @@
* along with this program; if not, you can find it at http://www.fsf.org
*/
-#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
-
#include <linux/usb/otg.h>
#include <linux/usb/msm_hsusb_hw.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
#define MSM_USB_BASE (hcd->regs)
+#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"
+
+static const char hcd_name[] = "ehci-msm";
+static struct hc_driver __read_mostly msm_hc_driver;
static struct usb_phy *phy;
static int ehci_msm_reset(struct usb_hcd *hcd)
@@ -56,52 +66,6 @@ static int ehci_msm_reset(struct usb_hcd *hcd)
return 0;
}
-static struct hc_driver msm_hc_driver = {
- .description = hcd_name,
- .product_desc = "Qualcomm On-Chip EHCI Host Controller",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_USB2 | HCD_MEMORY,
-
- .reset = ehci_msm_reset,
- .start = ehci_run,
-
- .stop = ehci_stop,
- .shutdown = ehci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ehci_urb_enqueue,
- .urb_dequeue = ehci_urb_dequeue,
- .endpoint_disable = ehci_endpoint_disable,
- .endpoint_reset = ehci_endpoint_reset,
- .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-
- /*
- * scheduling support
- */
- .get_frame_number = ehci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ehci_hub_status_data,
- .hub_control = ehci_hub_control,
- .relinquish_port = ehci_relinquish_port,
- .port_handed_over = ehci_port_handed_over,
-
- /*
- * PM support
- */
- .bus_suspend = ehci_bus_suspend,
- .bus_resume = ehci_bus_resume,
-};
-
static int ehci_msm_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
@@ -226,3 +190,28 @@ static struct platform_driver ehci_msm_driver = {
.pm = &ehci_msm_dev_pm_ops,
},
};
+
+static const struct ehci_driver_overrides msm_overrides __initdata = {
+ .reset = ehci_msm_reset,
+};
+
+static int __init ehci_msm_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+ ehci_init_driver(&msm_hc_driver, &msm_overrides);
+ return platform_driver_register(&ehci_msm_driver);
+}
+module_init(ehci_msm_init);
+
+static void __exit ehci_msm_cleanup(void)
+{
+ platform_driver_unregister(&ehci_msm_driver);
+}
+module_exit(ehci_msm_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:msm-ehci");
+MODULE_LICENSE("GPL");
--
1.8.1.2
--
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