diff options
Diffstat (limited to 'drivers/usb/host/ohci-s3c2410.c')
| -rw-r--r-- | drivers/usb/host/ohci-s3c2410.c | 136 |
1 files changed, 61 insertions, 75 deletions
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c index 4919afa4125e..f90101b9cdb9 100644 --- a/drivers/usb/host/ohci-s3c2410.c +++ b/drivers/usb/host/ohci-s3c2410.c @@ -19,19 +19,36 @@ * This file is licenced under the GPL. */ -#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include <linux/platform_data/usb-ohci-s3c2410.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> + +#include "ohci.h" + #define valid_port(idx) ((idx) == 1 || (idx) == 2) /* clock device associated with the hcd */ + +#define DRIVER_DESC "OHCI S3C2410 driver" + +static const char hcd_name[] = "ohci-s3c2410"; + static struct clk *clk; static struct clk *usb_clk; /* forward definitions */ +static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength); +static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); + static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); /* conversion functions */ @@ -47,10 +64,10 @@ static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) dev_dbg(&dev->dev, "s3c2410_start_hc:\n"); - clk_enable(usb_clk); + clk_prepare_enable(usb_clk); mdelay(2); /* let the bus clock stabilise */ - clk_enable(clk); + clk_prepare_enable(clk); if (info != NULL) { info->hcd = hcd; @@ -75,8 +92,8 @@ static void s3c2410_stop_hc(struct platform_device *dev) (info->enable_oc)(info, 0); } - clk_disable(clk); - clk_disable(usb_clk); + clk_disable_unprepare(clk); + clk_disable_unprepare(usb_clk); } /* ohci_s3c2410_hub_status_data @@ -93,7 +110,7 @@ ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf) int orig; int portno; - orig = ohci_hub_status_data(hcd, buf); + orig = orig_ohci_hub_status_data(hcd, buf); if (info == NULL) return orig; @@ -164,7 +181,7 @@ static int ohci_s3c2410_hub_control( * process the request straight away and exit */ if (info == NULL) { - ret = ohci_hub_control(hcd, typeReq, wValue, + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); goto out; } @@ -214,7 +231,7 @@ static int ohci_s3c2410_hub_control( break; } - ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); if (ret) goto out; @@ -374,8 +391,6 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, s3c2410_start_hc(dev, hcd); - ohci_hcd_init(hcd_to_ohci(hcd)); - retval = usb_add_hcd(hcd, dev->resource[1].start, 0); if (retval != 0) goto err_ioremap; @@ -392,71 +407,7 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, /*-------------------------------------------------------------------------*/ -static int -ohci_s3c2410_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - ret = ohci_init(ohci); - if (ret < 0) - return ret; - - ret = ohci_run(ohci); - if (ret < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - - return 0; -} - - -static const struct hc_driver ohci_s3c2410_hc_driver = { - .description = hcd_name, - .product_desc = "S3C24XX OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .start = ohci_s3c2410_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_s3c2410_hub_status_data, - .hub_control = ohci_s3c2410_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/* device driver */ +static struct hc_driver __read_mostly ohci_s3c2410_hc_driver; static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) { @@ -533,4 +484,39 @@ static struct platform_driver ohci_hcd_s3c2410_driver = { }, }; +static int __init ohci_s3c2410_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_s3c2410_hc_driver, NULL); + + /* + * The Samsung HW has some unusual quirks, which require + * Sumsung-specific workarounds. We override certain hc_driver + * functions here to achieve that. We explicitly do not enhance + * ohci_driver_overrides to allow this more easily, since this + * is an unusual case, and we don't want to encourage others to + * override these functions by making it too easy. + */ + + orig_ohci_hub_control = ohci_s3c2410_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_s3c2410_hc_driver.hub_status_data; + + ohci_s3c2410_hc_driver.hub_status_data = ohci_s3c2410_hub_status_data; + ohci_s3c2410_hc_driver.hub_control = ohci_s3c2410_hub_control; + + return platform_driver_register(&ohci_hcd_s3c2410_driver); +} +module_init(ohci_s3c2410_init); + +static void __exit ohci_s3c2410_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_s3c2410_driver); +} +module_exit(ohci_s3c2410_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:s3c2410-ohci"); |