Separate the OHCI NXP 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.
Many place function name and struct name started with usb, current scenario replaced usb with ohci for proper naming.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Arnd Bergmann arnd@arndb.de Cc: Alan Stern stern@rowland.harvard.edu Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org --- drivers/usb/host/Kconfig | 8 +++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 15 ------ drivers/usb/host/ohci-nxp.c | 124 +++++++++++++++++-------------------------- 4 files changed, 58 insertions(+), 90 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index f19524f..002bf73 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -398,6 +398,14 @@ config USB_OHCI_HCD_S3CXXXX Enables support for the on-chip OHCI controller on S3CXXXX chips.
+config USB_OHCI_HCD_LPC32XX + tristate "Support for LPC on-chip OHCI USB controller" + depends on USB_OHCI_HCD && ARCH_LPC32XX + default y + ---help--- + Enables support for the on-chip OHCI controller on + NXP 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 9dffe81..edc0909 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o obj-$(CONFIG_USB_OHCI_HCD_S3CXXXX) += ohci-s3c2410.o +obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o
obj-$(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 f3dcaa2..9a0b023 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1194,11 +1194,6 @@ MODULE_LICENSE ("GPL"); #define EP93XX_PLATFORM_DRIVER ohci_hcd_ep93xx_driver #endif
-#ifdef CONFIG_ARCH_LPC32XX -#include "ohci-nxp.c" -#define NXP_PLATFORM_DRIVER usb_hcd_nxp_driver -#endif - #ifdef CONFIG_ARCH_DAVINCI_DA8XX #include "ohci-da8xx.c" #define DAVINCI_PLATFORM_DRIVER ohci_hcd_da8xx_driver @@ -1301,12 +1296,6 @@ static int __init ohci_hcd_mod_init(void) goto error_ep93xx; #endif
-#ifdef NXP_PLATFORM_DRIVER - retval = platform_driver_register(&NXP_PLATFORM_DRIVER); - if (retval < 0) - goto error_nxp; -#endif - #ifdef DAVINCI_PLATFORM_DRIVER retval = platform_driver_register(&DAVINCI_PLATFORM_DRIVER); if (retval < 0) @@ -1320,10 +1309,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER); error_davinci: #endif -#ifdef NXP_PLATFORM_DRIVER - platform_driver_unregister(&NXP_PLATFORM_DRIVER); - error_nxp: -#endif #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c index 7d7d507..8d6eecf 100644 --- a/drivers/usb/host/ohci-nxp.c +++ b/drivers/usb/host/ohci-nxp.c @@ -19,10 +19,19 @@ * or implied. */ #include <linux/clk.h> -#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> #include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of.h> +#include <linux/platform_device.h> #include <linux/usb/isp1301.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> + +#include "ohci.h" +
#include <mach/hardware.h> #include <asm/mach-types.h> @@ -57,6 +66,11 @@ #define start_int_umask(irq) #endif
+#define DRIVER_DESC "OHCI NXP driver" + +static const char hcd_name[] = "ohci-nxp"; +static struct hc_driver __read_mostly ohci_nxp_hc_driver; + static struct i2c_client *isp1301_i2c_client;
extern int usb_disabled(void); @@ -132,14 +146,14 @@ static inline void isp1301_vbus_off(void) OTG1_VBUS_DRV); }
-static void nxp_start_hc(void) +static void ohci_nxp_start_hc(void) { unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN; __raw_writel(tmp, USB_OTG_STAT_CONTROL); isp1301_vbus_on(); }
-static void nxp_stop_hc(void) +static void ohci_nxp_stop_hc(void) { unsigned long tmp; isp1301_vbus_off(); @@ -147,68 +161,9 @@ static void nxp_stop_hc(void) __raw_writel(tmp, USB_OTG_STAT_CONTROL); }
-static int ohci_nxp_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - if ((ret = ohci_init(ohci)) < 0) - return ret; - - 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_nxp_hc_driver = { - .description = hcd_name, - .product_desc = "nxp OHCI", - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - .hcd_priv_size = sizeof(struct ohci_hcd), - /* - * basic lifecycle operations - */ - .start = ohci_nxp_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 usb_hcd_nxp_probe(struct platform_device *pdev) +static int ohci_hcd_nxp_probe(struct platform_device *pdev) { struct usb_hcd *hcd = 0; - struct ohci_hcd *ohci; const struct hc_driver *driver = &ohci_nxp_hc_driver; struct resource *res; int ret = 0, irq; @@ -313,17 +268,15 @@ static int usb_hcd_nxp_probe(struct platform_device *pdev) goto fail_resource; }
- nxp_start_hc(); + ohci_nxp_start_hc(); platform_set_drvdata(pdev, hcd); - ohci = hcd_to_ohci(hcd); - ohci_hcd_init(ohci);
dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); ret = usb_add_hcd(hcd, irq, 0); if (ret == 0) return ret;
- nxp_stop_hc(); + ohci_nxp_stop_hc(); fail_resource: usb_put_hcd(hcd); fail_hcd: @@ -345,12 +298,12 @@ fail_disable: return ret; }
-static int usb_hcd_nxp_remove(struct platform_device *pdev) +static int ohci_hcd_nxp_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd); - nxp_stop_hc(); + ohci_nxp_stop_hc(); usb_put_hcd(hcd); clk_disable(usb_pll_clk); clk_put(usb_pll_clk); @@ -366,20 +319,41 @@ static int usb_hcd_nxp_remove(struct platform_device *pdev) MODULE_ALIAS("platform:usb-ohci");
#ifdef CONFIG_OF -static const struct of_device_id usb_hcd_nxp_match[] = { +static const struct of_device_id ohci_hcd_nxp_match[] = { { .compatible = "nxp,ohci-nxp" }, {}, }; -MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match); +MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match); #endif
-static struct platform_driver usb_hcd_nxp_driver = { +static struct platform_driver ohci_hcd_nxp_driver = { .driver = { .name = "usb-ohci", .owner = THIS_MODULE, - .of_match_table = of_match_ptr(usb_hcd_nxp_match), + .of_match_table = of_match_ptr(ohci_hcd_nxp_match), }, - .probe = usb_hcd_nxp_probe, - .remove = usb_hcd_nxp_remove, + .probe = ohci_hcd_nxp_probe, + .remove = ohci_hcd_nxp_remove, };
+static int __init ohci_nxp_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ohci_init_driver(&ohci_nxp_hc_driver, NULL); + return platform_driver_register(&ohci_hcd_nxp_driver); +} +module_init(ohci_nxp_init); + +static void __exit ohci_nxp_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_nxp_driver); +} +module_exit(ohci_nxp_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL v2"); +