[RFC][PATCH 2/7] USB: OHCI: make ohci-omap a separate driver
Manjunath Goudar
manjunath.goudar at linaro.org
Fri Jun 7 02:03:28 EDT 2013
Separate the TI OHCI OMAP1/2 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 at linaro.org>
Cc: Felipe Balbi <balbi at ti.com>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Greg KH <greg at kroah.com>
Cc: Alan Stern <stern at rowland.harvard.edu>
Cc: linux-usb at vger.kernel.org
---
drivers/usb/host/Kconfig | 2 +-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ohci-hcd.c | 20 +-----
drivers/usb/host/ohci-omap.c | 142 ++++++++++++++++--------------------------
4 files changed, 55 insertions(+), 110 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index f827386..744673b 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -397,7 +397,7 @@ config USB_OHCI_HCD
if USB_OHCI_HCD
config USB_OHCI_HCD_OMAP1
- bool "OHCI support for OMAP1/2 chips"
+ tristate "OHCI support for OMAP1/2 chips"
depends on ARCH_OMAP1
default y
---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 2a4f11f..1326df2 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
+obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
obj-$(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 14962f8..4bfd890 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1178,11 +1178,6 @@ MODULE_LICENSE ("GPL");
#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver
#endif
-#ifdef CONFIG_USB_OHCI_HCD_OMAP1
-#include "ohci-omap.c"
-#define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver
-#endif
-
#ifdef CONFIG_USB_OHCI_HCD_OMAP3
#include "ohci-omap3.c"
#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
@@ -1256,8 +1251,8 @@ MODULE_LICENSE ("GPL");
#if !IS_ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
!IS_ENABLED(CONFIG_USB_OHCI_HCD_PLATFORM) && \
!IS_ENABLED(CONFIG_USB_OHCI_EXYNOS) && \
+ !IS_ENABLED(CONFIG_USB_OHCI_HCD_OMAP1) && \
!defined(PLATFORM_DRIVER) && \
- !defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \
!defined(OF_PLATFORM_DRIVER) && \
!defined(SA1111_DRIVER) && \
@@ -1305,12 +1300,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_platform;
#endif
-#ifdef OMAP1_PLATFORM_DRIVER
- retval = platform_driver_register(&OMAP1_PLATFORM_DRIVER);
- if (retval < 0)
- goto error_omap1_platform;
-#endif
-
#ifdef OMAP3_PLATFORM_DRIVER
retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
if (retval < 0)
@@ -1424,10 +1413,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
error_omap3_platform:
#endif
-#ifdef OMAP1_PLATFORM_DRIVER
- platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
- error_omap1_platform:
-#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
@@ -1482,9 +1467,6 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef OMAP3_PLATFORM_DRIVER
platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
#endif
-#ifdef OMAP1_PLATFORM_DRIVER
- platform_driver_unregister(&OMAP1_PLATFORM_DRIVER);
-#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
#endif
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 8747fa6..eee4b72 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -14,12 +14,21 @@
* This file is licenced under the GPL.
*/
-#include <linux/signal.h>
-#include <linux/jiffies.h>
-#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb/otg.h>
+#include <linux/platform_device.h>
+#include <linux/signal.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ohci.h"
#include <asm/io.h>
#include <asm/mach-types.h>
@@ -42,10 +51,7 @@
#define OMAP1510_LB_MMU_RAM_H 0xfffec234
#define OMAP1510_LB_MMU_RAM_L 0xfffec238
-
-#ifndef CONFIG_ARCH_OMAP
-#error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
-#endif
+#define DRIVER_DESC "OHCI OMAP driver"
#ifdef CONFIG_TPS65010
#include <linux/i2c/tps65010.h>
@@ -71,6 +77,10 @@ static struct clk *usb_dc_ck;
static int host_enabled;
static int host_initialized;
+static const char hcd_name[] = "ohci-omap";
+static struct hc_driver __read_mostly ohci_omap_hc_driver;
+
+
static void omap_ohci_clock_power(int on)
{
if (on) {
@@ -188,7 +198,7 @@ static void start_hnp(struct ohci_hcd *ohci)
/*-------------------------------------------------------------------------*/
-static int ohci_omap_init(struct usb_hcd *hcd)
+static int ohci_omap_reset(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct omap_usb_config *config = hcd->self.controller->platform_data;
@@ -201,8 +211,14 @@ static int ohci_omap_init(struct usb_hcd *hcd)
ohci_to_hcd(ohci)->self.otg_port = config->otg;
/* default/minimum OTG power budget: 8 mA */
ohci_to_hcd(ohci)->power_budget = 8;
+ ohci->hc_control = OHCI_CTRL_RWC;
+ writel(OHCI_CTRL_RWC, &ohci->regs->control);
}
+ if (config->rwc) {
+ ohci->hc_control = OHCI_CTRL_RWC;
+ writel(OHCI_CTRL_RWC, &ohci->regs->control);
+ }
/* boards can use OTG transceivers in non-OTG modes */
need_transceiver = need_transceiver
|| machine_is_omap_h2() || machine_is_omap_h3();
@@ -238,7 +254,8 @@ static int ohci_omap_init(struct usb_hcd *hcd)
omap_1510_local_bus_init();
}
- if ((ret = ohci_init(ohci)) < 0)
+ ret = ohci_setup(hcd);
+ if (ret < 0)
return ret;
/* board-specific power switching and overcurrent support */
@@ -281,14 +298,6 @@ static int ohci_omap_init(struct usb_hcd *hcd)
return 0;
}
-static void ohci_omap_stop(struct usb_hcd *hcd)
-{
- dev_dbg(hcd->self.controller, "stopping USB Controller\n");
- ohci_stop(hcd);
- omap_ohci_clock_power(0);
-}
-
-
/*-------------------------------------------------------------------------*/
/**
@@ -304,7 +313,6 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver,
{
int retval, irq;
struct usb_hcd *hcd = 0;
- struct ohci_hcd *ohci;
if (pdev->num_resources != 2) {
printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
@@ -354,8 +362,7 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver,
goto err2;
}
- ohci = hcd_to_ohci(hcd);
- ohci_hcd_init(ohci);
+ ohci_setup(hcd);
host_initialized = 0;
host_enabled = 1;
@@ -418,76 +425,6 @@ usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
/*-------------------------------------------------------------------------*/
-static int
-ohci_omap_start (struct usb_hcd *hcd)
-{
- struct omap_usb_config *config;
- struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ret;
-
- if (!host_enabled)
- return 0;
- config = hcd->self.controller->platform_data;
- if (config->otg || config->rwc) {
- ohci->hc_control = OHCI_CTRL_RWC;
- writel(OHCI_CTRL_RWC, &ohci->regs->control);
- }
-
- if ((ret = ohci_run (ohci)) < 0) {
- dev_err(hcd->self.controller, "can't start\n");
- ohci_stop (hcd);
- return ret;
- }
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static const struct hc_driver ohci_omap_hc_driver = {
- .description = hcd_name,
- .product_desc = "OMAP OHCI",
- .hcd_priv_size = sizeof(struct ohci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ohci_irq,
- .flags = HCD_USB11 | HCD_MEMORY,
-
- /*
- * basic lifecycle operations
- */
- .reset = ohci_omap_init,
- .start = ohci_omap_start,
- .stop = ohci_omap_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_omap_drv_probe(struct platform_device *dev)
{
return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
@@ -553,4 +490,29 @@ static struct platform_driver ohci_hcd_omap_driver = {
},
};
+static const struct ohci_driver_overrides omap_overrides __initconst = {
+ .product_desc = "OMAP OHCI",
+ .reset = ohci_omap_reset
+};
+
+static int __init ohci_omap_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
+ return platform_driver_register(&ohci_hcd_omap_driver);
+}
+module_init(ohci_omap_init);
+
+static void __exit ohci_omap_cleanup(void)
+{
+ platform_driver_unregister(&ohci_hcd_omap_driver);
+}
+module_exit(ohci_omap_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:ohci");
+MODULE_LICENSE("GPL");
--
1.7.9.5
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