diff options
Diffstat (limited to 'drivers/usb/host/ohci-s3c2410.c')
| -rw-r--r-- | drivers/usb/host/ohci-s3c2410.c | 199 |
1 files changed, 75 insertions, 124 deletions
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c index 56dcf069246..3d753a9d314 100644 --- a/drivers/usb/host/ohci-s3c2410.c +++ b/drivers/usb/host/ohci-s3c2410.c @@ -19,14 +19,27 @@ * This file is licenced under the GPL. */ -#include <linux/platform_device.h> #include <linux/clk.h> -#include <plat/usb-control.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; @@ -38,19 +51,19 @@ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd) { - return hcd->self.controller->platform_data; + return dev_get_platdata(hcd->self.controller); } static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) { - struct s3c2410_hcd_info *info = dev->dev.platform_data; + struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev); 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; @@ -63,7 +76,7 @@ static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) static void s3c2410_stop_hc(struct platform_device *dev) { - struct s3c2410_hcd_info *info = dev->dev.platform_data; + struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev); dev_dbg(&dev->dev, "s3c2410_stop_hc:\n"); @@ -75,8 +88,8 @@ 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 +106,7 @@ ohci_s3c2410_hub_status_data(struct usb_hcd *hcd, char *buf) int orig; int portno; - orig = ohci_hub_status_data(hcd, buf); + orig = ohci_hub_status_data(hcd, buf); if (info == NULL) return orig; @@ -323,8 +336,6 @@ usb_hcd_s3c2410_remove(struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); s3c2410_stop_hc(dev); - iounmap(hcd->regs); - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } @@ -341,10 +352,11 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, struct platform_device *dev) { struct usb_hcd *hcd = NULL; + struct s3c2410_hcd_info *info = dev_get_platdata(&dev->dev); int retval; - s3c2410_usb_set_power(dev->dev.platform_data, 1, 1); - s3c2410_usb_set_power(dev->dev.platform_data, 2, 1); + s3c2410_usb_set_power(info, 1, 1); + s3c2410_usb_set_power(info, 2, 1); hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx"); if (hcd == NULL) @@ -353,53 +365,37 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver, hcd->rsrc_start = dev->resource[0].start; hcd->rsrc_len = resource_size(&dev->resource[0]); - if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { - dev_err(&dev->dev, "request_mem_region failed\n"); - retval = -EBUSY; + hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]); + if (IS_ERR(hcd->regs)) { + retval = PTR_ERR(hcd->regs); goto err_put; } - clk = clk_get(&dev->dev, "usb-host"); + clk = devm_clk_get(&dev->dev, "usb-host"); if (IS_ERR(clk)) { dev_err(&dev->dev, "cannot get usb-host clock\n"); retval = PTR_ERR(clk); - goto err_mem; + goto err_put; } - usb_clk = clk_get(&dev->dev, "usb-bus-host"); + usb_clk = devm_clk_get(&dev->dev, "usb-bus-host"); if (IS_ERR(usb_clk)) { dev_err(&dev->dev, "cannot get usb-bus-host clock\n"); retval = PTR_ERR(usb_clk); - goto err_clk; + goto err_put; } s3c2410_start_hc(dev, hcd); - hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); - if (!hcd->regs) { - dev_err(&dev->dev, "ioremap failed\n"); - retval = -ENOMEM; - goto err_ioremap; - } - - ohci_hcd_init(hcd_to_ohci(hcd)); - retval = usb_add_hcd(hcd, dev->resource[1].start, 0); if (retval != 0) goto err_ioremap; + device_wakeup_enable(hcd->self.controller); return 0; err_ioremap: s3c2410_stop_hc(dev); - iounmap(hcd->regs); - clk_put(usb_clk); - - err_clk: - clk_put(clk); - - err_mem: - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err_put: usb_put_hcd(hcd); @@ -408,77 +404,14 @@ 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) { - err("can't start %s", 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, +static struct hc_driver __read_mostly ohci_s3c2410_hc_driver; - /* - * 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 int __devinit ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) +static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) { return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev); } -static int __devexit ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) +static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); @@ -490,28 +423,15 @@ static int __devexit ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) static int ohci_hcd_s3c2410_drv_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); - struct ohci_hcd *ohci = hcd_to_ohci(hcd); struct platform_device *pdev = to_platform_device(dev); - unsigned long flags; + bool do_wakeup = device_may_wakeup(dev); int rc = 0; - /* - * Root hub was already suspended. Disable irq emission and - * mark HW unaccessible, bail out if RH has been resumed. Use - * the spinlock to properly synchronize with possible pending - * RH suspend or resume activity. - */ - spin_lock_irqsave(&ohci->lock, flags); - if (ohci->rh_state != OHCI_RH_SUSPENDED) { - rc = -EINVAL; - goto bail; - } - - clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + rc = ohci_suspend(hcd, do_wakeup); + if (rc) + return rc; s3c2410_stop_hc(pdev); -bail: - spin_unlock_irqrestore(&ohci->lock, flags); return rc; } @@ -523,8 +443,7 @@ static int ohci_hcd_s3c2410_drv_resume(struct device *dev) s3c2410_start_hc(pdev, hcd); - set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - ohci_finish_controller_resume(hcd); + ohci_resume(hcd, false); return 0; } @@ -540,7 +459,7 @@ static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = { static struct platform_driver ohci_hcd_s3c2410_driver = { .probe = ohci_hcd_s3c2410_drv_probe, - .remove = __devexit_p(ohci_hcd_s3c2410_drv_remove), + .remove = ohci_hcd_s3c2410_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .owner = THIS_MODULE, @@ -549,4 +468,36 @@ 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. + */ + + 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"); |