Separate the Samsung OHCI EXYNOS 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 3.12.
Signed-off-by: Manjunath Goudar manjunath.goudar@linaro.org Signed-off-by: Deepak Saxena dsaxena@linaro.org Acked-by: Alan Stern stern@rowland.harvard.edu Acked-by: Jingoo Han jg1.han@samsung.com Cc: Vivek Gautam gautam.vivek@samsung.com Cc: Arnd Bergmann arnd@arndb.de Cc: Kukjin Kim kgene.kim@samsung.com Cc: Greg KH greg@kroah.com Cc: linux-usb@vger.kernel.org
V2: -exynos_ohci_hcd structure assignment error fixed. -Removed multiple usb_create_hcd() from prob funtion. -platform_set_drvdata() called before exynos_ohci_phy_enable(). -ohci_setup() removed because it is called in .reset member of the ohci_hc_driver structure
V3: -No major changes only "exynos" written in capital letters in "OHCI exynos driver".
V4: -No change.
V5: -No Change.
--- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ohci-exynos.c | 167 +++++++++++++++++----------------------- drivers/usb/host/ohci-hcd.c | 18 ----- 4 files changed, 71 insertions(+), 117 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 7bc598b..7b8f6bd 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -463,7 +463,7 @@ config USB_OHCI_SH If you use the PCI OHCI controller, this option is not necessary.
config USB_OHCI_EXYNOS - boolean "OHCI support for Samsung EXYNOS SoC Series" + tristate "OHCI support for Samsung EXYNOS SoC Series" depends on ARCH_EXYNOS help Enable support for the Samsung Exynos SOC's on-chip OHCI controller. diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 28adb3f..45e2ffb 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -44,6 +44,7 @@ obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o obj-$(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_UHCI_HCD) += uhci-hcd.o obj-$(CONFIG_USB_FHCI_HCD) += fhci.o diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index b0b542c..ae6068d 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -12,24 +12,39 @@ */
#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/platform_data/usb-ohci-exynos.h> #include <linux/usb/phy.h> #include <linux/usb/samsung_usb_phy.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> +#include <linux/usb/otg.h> + +#include "ohci.h" + +#define DRIVER_DESC "OHCI EXYNOS driver" + +static const char hcd_name[] = "ohci-exynos"; +static struct hc_driver __read_mostly exynos_ohci_hc_driver; + +#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
struct exynos_ohci_hcd { - struct device *dev; - struct usb_hcd *hcd; struct clk *clk; struct usb_phy *phy; struct usb_otg *otg; struct exynos4_ohci_platdata *pdata; };
-static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci) +static void exynos_ohci_phy_enable(struct platform_device *pdev) { - struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
if (exynos_ohci->phy) usb_phy_init(exynos_ohci->phy); @@ -37,9 +52,10 @@ static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci) exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); }
-static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci) +static void exynos_ohci_phy_disable(struct platform_device *pdev) { - struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
if (exynos_ohci->phy) usb_phy_shutdown(exynos_ohci->phy); @@ -47,63 +63,11 @@ static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci) exynos_ohci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); }
-static int ohci_exynos_reset(struct usb_hcd *hcd) -{ - return ohci_init(hcd_to_ohci(hcd)); -} - -static int ohci_exynos_start(struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci(hcd); - int ret; - - ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci); - - 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 exynos_ohci_hc_driver = { - .description = hcd_name, - .product_desc = "EXYNOS OHCI Host Controller", - .hcd_priv_size = sizeof(struct ohci_hcd), - - .irq = ohci_irq, - .flags = HCD_MEMORY|HCD_USB11, - - .reset = ohci_exynos_reset, - .start = ohci_exynos_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - .get_frame_number = ohci_get_frame, - - .urb_enqueue = ohci_urb_enqueue, - .urb_dequeue = ohci_urb_dequeue, - .endpoint_disable = ohci_endpoint_disable, - - .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 exynos_ohci_probe(struct platform_device *pdev) { struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; struct exynos_ohci_hcd *exynos_ohci; struct usb_hcd *hcd; - struct ohci_hcd *ohci; struct resource *res; struct usb_phy *phy; int irq; @@ -119,10 +83,14 @@ static int exynos_ohci_probe(struct platform_device *pdev) if (!pdev->dev.coherent_dma_mask) pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd), - GFP_KERNEL); - if (!exynos_ohci) + hcd = usb_create_hcd(&exynos_ohci_hc_driver, + &pdev->dev, dev_name(&pdev->dev)); + if (!hcd) { + dev_err(&pdev->dev, "Unable to create HCD\n"); return -ENOMEM; + } + + exynos_ohci = to_exynos_ohci(hcd);
if (of_device_is_compatible(pdev->dev.of_node, "samsung,exynos5440-ohci")) @@ -143,17 +111,6 @@ static int exynos_ohci_probe(struct platform_device *pdev) }
skip_phy: - - exynos_ohci->dev = &pdev->dev; - - hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev, - dev_name(&pdev->dev)); - if (!hcd) { - dev_err(&pdev->dev, "Unable to create HCD\n"); - return -ENOMEM; - } - - exynos_ohci->hcd = hcd; exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
if (IS_ERR(exynos_ohci->clk)) { @@ -190,26 +147,21 @@ skip_phy: }
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci); + platform_set_drvdata(pdev, hcd);
- ohci = hcd_to_ohci(hcd); - ohci_hcd_init(ohci); + exynos_ohci_phy_enable(pdev);
err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) { dev_err(&pdev->dev, "Failed to add USB HCD\n"); goto fail_add_hcd; } - - platform_set_drvdata(pdev, exynos_ohci); - return 0;
fail_add_hcd: - exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev); fail_io: clk_disable_unprepare(exynos_ohci->clk); fail_clk: @@ -219,16 +171,15 @@ fail_clk:
static int exynos_ohci_remove(struct platform_device *pdev) { - struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
usb_remove_hcd(hcd);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -239,8 +190,7 @@ static int exynos_ohci_remove(struct platform_device *pdev)
static void exynos_ohci_shutdown(struct platform_device *pdev) { - struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev);
if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); @@ -249,9 +199,10 @@ static void exynos_ohci_shutdown(struct platform_device *pdev) #ifdef CONFIG_PM static int exynos_ohci_suspend(struct device *dev) { - struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd); struct ohci_hcd *ohci = hcd_to_ohci(hcd); + struct platform_device *pdev = to_platform_device(dev); unsigned long flags; int rc = 0;
@@ -271,10 +222,9 @@ static int exynos_ohci_suspend(struct device *dev) clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_disable(exynos_ohci); + exynos_ohci_phy_disable(pdev);
clk_disable_unprepare(exynos_ohci->clk);
@@ -286,16 +236,16 @@ fail:
static int exynos_ohci_resume(struct device *dev) { - struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); - struct usb_hcd *hcd = exynos_ohci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd); + struct platform_device *pdev = to_platform_device(dev);
clk_prepare_enable(exynos_ohci->clk);
if (exynos_ohci->otg) - exynos_ohci->otg->set_host(exynos_ohci->otg, - &exynos_ohci->hcd->self); + exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
- exynos_ohci_phy_enable(exynos_ohci); + exynos_ohci_phy_enable(pdev);
ohci_resume(hcd, false);
@@ -306,6 +256,10 @@ static int exynos_ohci_resume(struct device *dev) #define exynos_ohci_resume NULL #endif
+static const struct ohci_driver_overrides exynos_overrides __initconst = { + .extra_priv_size = sizeof(struct exynos_ohci_hcd), +}; + static const struct dev_pm_ops exynos_ohci_pm_ops = { .suspend = exynos_ohci_suspend, .resume = exynos_ohci_resume, @@ -331,6 +285,23 @@ static struct platform_driver exynos_ohci_driver = { .of_match_table = of_match_ptr(exynos_ohci_match), } }; +static int __init ohci_exynos_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides); + return platform_driver_register(&exynos_ohci_driver); +} +module_init(ohci_exynos_init); + +static void __exit ohci_exynos_cleanup(void) +{ + platform_driver_unregister(&exynos_ohci_driver); +} +module_exit(ohci_exynos_cleanup);
MODULE_ALIAS("platform:exynos-ohci"); MODULE_AUTHOR("Jingoo Han jg1.han@samsung.com"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index a9d3437..2980bb6 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_EXYNOS -#include "ohci-exynos.c" -#define EXYNOS_PLATFORM_DRIVER exynos_ohci_driver -#endif - #ifdef CONFIG_USB_OHCI_HCD_OMAP1 #include "ohci-omap.c" #define OMAP1_PLATFORM_DRIVER ohci_hcd_omap_driver @@ -1336,12 +1331,6 @@ static int __init ohci_hcd_mod_init(void) goto error_s3c2410; #endif
-#ifdef EXYNOS_PLATFORM_DRIVER - retval = platform_driver_register(&EXYNOS_PLATFORM_DRIVER); - if (retval < 0) - goto error_exynos; -#endif - #ifdef EP93XX_PLATFORM_DRIVER retval = platform_driver_register(&EP93XX_PLATFORM_DRIVER); if (retval < 0) @@ -1395,10 +1384,6 @@ static int __init ohci_hcd_mod_init(void) platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); error_ep93xx: #endif -#ifdef EXYNOS_PLATFORM_DRIVER - platform_driver_unregister(&EXYNOS_PLATFORM_DRIVER); - error_exynos: -#endif #ifdef S3C2410_PLATFORM_DRIVER platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); error_s3c2410: @@ -1463,9 +1448,6 @@ static void __exit ohci_hcd_mod_exit(void) #ifdef EP93XX_PLATFORM_DRIVER platform_driver_unregister(&EP93XX_PLATFORM_DRIVER); #endif -#ifdef EXYNOS_PLATFORM_DRIVER - platform_driver_unregister(&EXYNOS_PLATFORM_DRIVER); -#endif #ifdef S3C2410_PLATFORM_DRIVER platform_driver_unregister(&S3C2410_PLATFORM_DRIVER); #endif