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; it would be nice to have in 3.11.
V2: -omap_ohci_clock_power(0) called in usb_hcd_omap_remove(). -Removed ohci_setup() call from usb_hcd_omap_probe() and ohci_omap_reset(). -host_enabled and host_initialized variables aren't used for anything thats what removed.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Cc: Felipe Balbi balbi@ti.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg KH greg@kroah.com Cc: Alan Stern stern@rowland.harvard.edu Cc: linux-usb@vger.kernel.org --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-hcd.c | 18 ----- drivers/usb/host/ohci-omap.c | 156 +++++++++++++----------------------------- 4 files changed, 51 insertions(+), 126 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 75456f2..7a87c72 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -376,7 +376,7 @@ 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 bf4a4b2..52f2c44 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -46,6 +46,7 @@ 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 2980bb6..1abc1e7 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -1182,11 +1182,6 @@ 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 @@ -1289,12 +1284,6 @@ 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) @@ -1408,10 +1397,6 @@ 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: @@ -1466,9 +1451,6 @@ 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..b900dba 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> @@ -68,8 +74,9 @@ extern int ocpi_enable(void);
static struct clk *usb_host_ck; 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) { @@ -188,21 +195,21 @@ 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; int need_transceiver = (config->otg != 0); - int ret;
dev_dbg(hcd->self.controller, "starting USB Controller\n");
- if (config->otg) { + if (config->otg || config->rwc) { 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); } - /* boards can use OTG transceivers in non-OTG modes */ need_transceiver = need_transceiver || machine_is_omap_h2() || machine_is_omap_h3(); @@ -238,9 +245,6 @@ static int ohci_omap_init(struct usb_hcd *hcd) omap_1510_local_bus_init(); }
- if ((ret = ohci_init(ohci)) < 0) - return ret; - /* board-specific power switching and overcurrent support */ if (machine_is_omap_osk() || machine_is_omap_innovator()) { u32 rh = roothub_a (ohci); @@ -281,14 +285,6 @@ 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 +300,6 @@ 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", @@ -354,12 +349,6 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, goto err2; }
- ohci = hcd_to_ohci(hcd); - ohci_hcd_init(ohci); - - host_initialized = 0; - host_enabled = 1; - irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = -ENXIO; @@ -368,12 +357,8 @@ static int usb_hcd_omap_probe (const struct hc_driver *driver, retval = usb_add_hcd(hcd, irq, 0); if (retval) goto err3; - - host_initialized = 1; - - if (!host_enabled) - omap_ohci_clock_power(0); - + + omap_ohci_clock_power(0); return 0; err3: iounmap(hcd->regs); @@ -402,6 +387,8 @@ err0: static inline void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) { + dev_dbg(hcd->self.controller, "stopping USB Controller\n"); + omap_ohci_clock_power(0); usb_remove_hcd(hcd); if (!IS_ERR_OR_NULL(hcd->phy)) { (void) otg_set_host(hcd->phy->otg, 0); @@ -418,76 +405,6 @@ 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 +470,29 @@ 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");