From 7edb3daf78e5124b64a39b6eb264ec2a487e295a Mon Sep 17 00:00:00 2001 From: Manjunath Goudar Date: Tue, 2 Apr 2013 18:24:01 +0200 Subject: [PATCH] USB: EHCI: make ehci-s5p a separate driver Separate the Samsung S5P/EXYNOS host controller driver from ehci-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; however, note that other changes are still needed before S5P/EXYNOS can be booted with a multi-platform kernel. We currently expect those to get merged for 3.10. With the infrastructure added by Alan Stern in patch 3e0232039 "USB: EHCI: prepare to make ehci-hcd a library module", we can avoid this problem by turning a bus glue into a separate module, as we do here for the s5p bus glue. In V4 (arnd) - revert some of the pointless changes. - fix allocation of s5p specific data structure. In V3: - Detailed commit message added here, why this patch is required. - MODULE_LICENSE is GPL v2. - Added .extra_priv_size to eliminate the separate allocation of the s5p_ehci_hcd structure and removed .reset function pointer initialization. - Arranged #include's in alphabetical order. - After using extra_priv_size initialization, struct usb_hcd *hcd is redundant and can be removed from the probe function. - Eliminated s5p_ehci_phy_enable,contents of statements moved into the s5p_ehci_probe - Eliminated s5p_ehci_phy_disable, contents of statements moved into the s5p_ehci_remove. In V2: - Tegra patch related changes removed from this patch. Signed-off-by: Manjunath Goudar Acked-by: Jingoo Han Acked-by: Alan Stern Cc: Kukjin Kim Cc: Kyungmin Park Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/Kconfig | 5 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-hcd.c | 6 +- drivers/usb/host/ehci-s5p.c | 164 ++++++++++++++++++------------------ 4 files changed, 85 insertions(+), 91 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index ae2c747b6e17..5d4f42afb4b5 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -220,10 +220,11 @@ config USB_EHCI_SH If you use the PCI EHCI controller, this option is not necessary. config USB_EHCI_S5P - boolean "S5P EHCI support" + tristate "EHCI support for Samsung S5P/EXYNOS SoC Series" depends on USB_EHCI_HCD && PLAT_S5P help - Enable support for the S5P SOC's on-chip EHCI controller. + Enable support for the Samsung S5Pxxxx and Exynos3/4/5 SOC's + on-chip EHCI controller. config USB_EHCI_MV bool "EHCI support for Marvell PXA/MMP USB controller" diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 3e02471e0f50..3d895b5adc32 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o obj-$(CONFIG_USB_EHCI_HCD_ORION) += ehci-orion.o obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o +obj-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index c8c70a1fabc4..8f1f4b489a68 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1284,11 +1284,6 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER tegra_ehci_driver #endif -#ifdef CONFIG_USB_EHCI_S5P -#include "ehci-s5p.c" -#define PLATFORM_DRIVER s5p_ehci_driver -#endif - #ifdef CONFIG_SPARC_LEON #include "ehci-grlib.c" #define PLATFORM_DRIVER ehci_grlib_driver @@ -1311,6 +1306,7 @@ MODULE_LICENSE ("GPL"); !IS_ENABLED(CONFIG_USB_EHCI_HCD_OMAP) && \ !IS_ENABLED(CONFIG_USB_EHCI_HCD_ORION) && \ !IS_ENABLED(CONFIG_USB_EHCI_HCD_SPEAR) && \ + !IS_ENABLED(CONFIG_USB_EHCI_S5P) && \ !defined(PLATFORM_DRIVER) && \ !defined(PS3_SYSTEM_BUS_DRIVER) && \ !defined(OF_PLATFORM_DRIVER) && \ diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c index 43a2a16732f5..d8cb0ca563b5 100644 --- a/drivers/usb/host/ehci-s5p.c +++ b/drivers/usb/host/ehci-s5p.c @@ -13,13 +13,24 @@ */ #include +#include +#include +#include +#include #include -#include #include +#include #include #include #include #include +#include +#include +#include + +#include "ehci.h" + +#define DRIVER_DESC "EHCI s5p driver" #define EHCI_INSNREG00(base) (base + 0x90) #define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25) @@ -30,65 +41,17 @@ (EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \ EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN) +static const char hcd_name[] = "ehci-s5p"; +static struct hc_driver __read_mostly s5p_ehci_hc_driver; + struct s5p_ehci_hcd { - struct device *dev; - struct usb_hcd *hcd; struct clk *clk; struct usb_phy *phy; struct usb_otg *otg; struct s5p_ehci_platdata *pdata; }; -static const struct hc_driver s5p_ehci_hc_driver = { - .description = hcd_name, - .product_desc = "S5P EHCI Host Controller", - .hcd_priv_size = sizeof(struct ehci_hcd), - - .irq = ehci_irq, - .flags = HCD_MEMORY | HCD_USB2, - - .reset = ehci_setup, - .start = ehci_run, - .stop = ehci_stop, - .shutdown = ehci_shutdown, - - .get_frame_number = ehci_get_frame, - - .urb_enqueue = ehci_urb_enqueue, - .urb_dequeue = ehci_urb_dequeue, - .endpoint_disable = ehci_endpoint_disable, - .endpoint_reset = ehci_endpoint_reset, - - .hub_status_data = ehci_hub_status_data, - .hub_control = ehci_hub_control, - .bus_suspend = ehci_bus_suspend, - .bus_resume = ehci_bus_resume, - - .relinquish_port = ehci_relinquish_port, - .port_handed_over = ehci_port_handed_over, - - .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, -}; - -static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci) -{ - struct platform_device *pdev = to_platform_device(s5p_ehci->dev); - - if (s5p_ehci->phy) - usb_phy_init(s5p_ehci->phy); - else if (s5p_ehci->pdata->phy_init) - s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); -} - -static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci) -{ - struct platform_device *pdev = to_platform_device(s5p_ehci->dev); - - if (s5p_ehci->phy) - usb_phy_shutdown(s5p_ehci->phy); - else if (s5p_ehci->pdata->phy_exit) - s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); -} +#define to_s5p_ehci(hcd) (struct s5p_ehci_hcd *)(hcd_to_ehci(hcd)->priv) static void s5p_setup_vbus_gpio(struct platform_device *pdev) { @@ -134,11 +97,13 @@ static int s5p_ehci_probe(struct platform_device *pdev) s5p_setup_vbus_gpio(pdev); - s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd), - GFP_KERNEL); - if (!s5p_ehci) + hcd = usb_create_hcd(&s5p_ehci_hc_driver, + &pdev->dev, dev_name(&pdev->dev)); + if (!hcd) { + dev_err(&pdev->dev, "Unable to create HCD\n"); return -ENOMEM; - + } + s5p_ehci = to_s5p_ehci(hcd); phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); if (IS_ERR(phy)) { /* Fallback to pdata */ @@ -153,16 +118,6 @@ static int s5p_ehci_probe(struct platform_device *pdev) s5p_ehci->otg = phy->otg; } - s5p_ehci->dev = &pdev->dev; - - hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev, - dev_name(&pdev->dev)); - if (!hcd) { - dev_err(&pdev->dev, "Unable to create HCD\n"); - return -ENOMEM; - } - - s5p_ehci->hcd = hcd; s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost"); if (IS_ERR(s5p_ehci->clk)) { @@ -199,9 +154,12 @@ static int s5p_ehci_probe(struct platform_device *pdev) } if (s5p_ehci->otg) - s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); + s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self); - s5p_ehci_phy_enable(s5p_ehci); + if (s5p_ehci->phy) + usb_phy_init(s5p_ehci->phy); + else if (s5p_ehci->pdata->phy_init) + s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; @@ -220,7 +178,10 @@ static int s5p_ehci_probe(struct platform_device *pdev) return 0; fail_add_hcd: - s5p_ehci_phy_disable(s5p_ehci); + if (s5p_ehci->phy) + usb_phy_shutdown(s5p_ehci->phy); + else if (s5p_ehci->pdata->phy_exit) + s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); fail_io: clk_disable_unprepare(s5p_ehci->clk); fail_clk: @@ -230,15 +191,18 @@ fail_clk: static int s5p_ehci_remove(struct platform_device *pdev) { - struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = s5p_ehci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd); usb_remove_hcd(hcd); if (s5p_ehci->otg) - s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); + s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self); - s5p_ehci_phy_disable(s5p_ehci); + if (s5p_ehci->phy) + usb_phy_shutdown(s5p_ehci->phy); + else if (s5p_ehci->pdata->phy_exit) + s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); clk_disable_unprepare(s5p_ehci->clk); @@ -249,8 +213,7 @@ static int s5p_ehci_remove(struct platform_device *pdev) static void s5p_ehci_shutdown(struct platform_device *pdev) { - struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev); - struct usb_hcd *hcd = s5p_ehci->hcd; + struct usb_hcd *hcd = platform_get_drvdata(pdev); if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); @@ -259,17 +222,22 @@ static void s5p_ehci_shutdown(struct platform_device *pdev) #ifdef CONFIG_PM static int s5p_ehci_suspend(struct device *dev) { - struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); - struct usb_hcd *hcd = s5p_ehci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd); + struct platform_device *pdev = to_platform_device(dev); + bool do_wakeup = device_may_wakeup(dev); int rc; rc = ehci_suspend(hcd, do_wakeup); if (s5p_ehci->otg) - s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); + s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self); - s5p_ehci_phy_disable(s5p_ehci); + if (s5p_ehci->phy) + usb_phy_shutdown(s5p_ehci->phy); + else if (s5p_ehci->pdata->phy_exit) + s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); clk_disable_unprepare(s5p_ehci->clk); @@ -278,15 +246,19 @@ static int s5p_ehci_suspend(struct device *dev) static int s5p_ehci_resume(struct device *dev) { - struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev); - struct usb_hcd *hcd = s5p_ehci->hcd; + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct s5p_ehci_hcd *s5p_ehci = to_s5p_ehci(hcd); + struct platform_device *pdev = to_platform_device(dev); clk_prepare_enable(s5p_ehci->clk); if (s5p_ehci->otg) - s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self); + s5p_ehci->otg->set_host(s5p_ehci->otg, &hcd->self); - s5p_ehci_phy_enable(s5p_ehci); + if (s5p_ehci->phy) + usb_phy_init(s5p_ehci->phy); + else if (s5p_ehci->pdata->phy_init) + s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); /* DMA burst Enable */ writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs)); @@ -323,5 +295,29 @@ static struct platform_driver s5p_ehci_driver = { .of_match_table = of_match_ptr(exynos_ehci_match), } }; +static const struct ehci_driver_overrides s5p_overrides __initdata = { + .extra_priv_size = sizeof(struct s5p_ehci_hcd), +}; + +static int __init ehci_s5p_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ehci_init_driver(&s5p_ehci_hc_driver, &s5p_overrides); + return platform_driver_register(&s5p_ehci_driver); +} +module_init(ehci_s5p_init); + +static void __exit ehci_s5p_cleanup(void) +{ + platform_driver_unregister(&s5p_ehci_driver); +} +module_exit(ehci_s5p_cleanup); +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:s5p-ehci"); +MODULE_AUTHOR("Jingoo Han"); +MODULE_AUTHOR("Joonyoung Shim"); +MODULE_LICENSE("GPL v2"); -- 2.30.2