From: Manjunath Goudar <[email protected]> Separate the Tegra on-chip 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.
Signed-off-by: Manjunath Goudar <[email protected]> [swarren, reworked Manjunath's patches to split them more logically, minor re-order of added lines to better match layout of other split-up HCD drivers and existing code, add MODULE_DEVICE_TABLE, fix MODULE_LICENSE.] Signed-off-by: Stephen Warren <[email protected]> --- drivers/usb/host/Kconfig | 2 +- drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-hcd.c | 5 -- drivers/usb/host/ehci-tegra.c | 125 ++++++++++++++++++++--------------------- 4 files changed, 63 insertions(+), 70 deletions(-) diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index fcb20fd..6c9347c 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -200,7 +200,7 @@ config USB_EHCI_MSM has an external PHY. config USB_EHCI_TEGRA - boolean "NVIDIA Tegra HCD support" + tristate "NVIDIA Tegra HCD support" depends on ARCH_TEGRA select USB_EHCI_ROOT_HUB_TT select USB_PHY diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index dbc785d..c170383 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o obj-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o +obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o obj-$(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 75cf500..2eab6f0 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1278,11 +1278,6 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER ehci_hcd_msp_driver #endif -#ifdef CONFIG_USB_EHCI_TEGRA -#include "ehci-tegra.c" -#define PLATFORM_DRIVER tegra_ehci_driver -#endif - #ifdef CONFIG_SPARC_LEON #include "ehci-grlib.c" #define PLATFORM_DRIVER ehci_grlib_driver diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index edf7d36..d12bc83 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -17,25 +17,38 @@ */ #include <linux/clk.h> +#include <linux/clk/tegra.h> +#include <linux/dma-mapping.h> #include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/platform_data/tegra_usb.h> -#include <linux/irq.h> -#include <linux/usb/otg.h> #include <linux/gpio.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/platform_device.h> +#include <linux/platform_data/tegra_usb.h> #include <linux/pm_runtime.h> +#include <linux/slab.h> #include <linux/usb/ehci_def.h> #include <linux/usb/tegra_usb_phy.h> -#include <linux/clk/tegra.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> +#include <linux/usb/otg.h> + +#include "ehci.h" #define TEGRA_USB_BASE 0xC5000000 #define TEGRA_USB2_BASE 0xC5004000 #define TEGRA_USB3_BASE 0xC5008000 +#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) + #define TEGRA_USB_DMA_ALIGN 32 +#define DRIVER_DESC "Tegra EHCI driver" +#define DRV_NAME "tegra-ehci" + struct tegra_ehci_hcd { struct ehci_hcd *ehci; struct tegra_usb_phy *phy; @@ -47,6 +60,8 @@ struct tegra_ehci_hcd { enum tegra_usb_phy_port_speed port_speed; }; +static struct hc_driver __read_mostly tegra_ehci_hc_driver; + static void tegra_ehci_power_up(struct usb_hcd *hcd) { struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller); @@ -264,31 +279,6 @@ static void tegra_ehci_restart(struct usb_hcd *hcd) up_write(&ehci_cf_port_reset_rwsem); } -static void tegra_ehci_shutdown(struct usb_hcd *hcd) -{ - struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller); - - /* ehci_shutdown touches the USB controller registers, make sure - * controller has clocks to it */ - if (!tegra->host_resumed) - tegra_ehci_power_up(hcd); - - ehci_shutdown(hcd); -} - -static int tegra_ehci_setup(struct usb_hcd *hcd) -{ - struct ehci_hcd *ehci = hcd_to_ehci(hcd); - - /* EHCI registers start at offset 0x100 */ - ehci->caps = hcd->regs + 0x100; - - /* switch to host mode */ - hcd->has_tt = 1; - - return ehci_setup(hcd); -} - struct dma_aligned_buffer { void *kmalloc_ptr; void *old_xfer_buffer; @@ -368,38 +358,6 @@ static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) free_dma_aligned_buffer(urb); } -static const struct hc_driver tegra_ehci_hc_driver = { - .description = hcd_name, - .product_desc = "Tegra EHCI Host Controller", - .hcd_priv_size = sizeof(struct ehci_hcd), - .flags = HCD_USB2 | HCD_MEMORY, - - /* standard ehci functions */ - .irq = ehci_irq, - .start = ehci_run, - .stop = ehci_stop, - .urb_enqueue = ehci_urb_enqueue, - .urb_dequeue = ehci_urb_dequeue, - .endpoint_disable = ehci_endpoint_disable, - .endpoint_reset = ehci_endpoint_reset, - .get_frame_number = ehci_get_frame, - .hub_status_data = ehci_hub_status_data, - .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, - .relinquish_port = ehci_relinquish_port, - .port_handed_over = ehci_port_handed_over, - - /* modified ehci functions for tegra */ - .reset = tegra_ehci_setup, - .shutdown = tegra_ehci_shutdown, - .map_urb_for_dma = tegra_ehci_map_urb_for_dma, - .unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma, - .hub_control = tegra_ehci_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ehci_bus_suspend, - .bus_resume = ehci_bus_resume, -#endif -}; - static int setup_vbus_gpio(struct platform_device *pdev, struct tegra_ehci_platform_data *pdata) { @@ -672,6 +630,9 @@ static int tegra_ehci_probe(struct platform_device *pdev) err = -ENOMEM; goto cleanup_clk; } + tegra->ehci = hcd_to_ehci(hcd); + + hcd->has_tt = 1; hcd->phy = u_phy; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -688,6 +649,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) err = -ENOMEM; goto cleanup_hcd_create; } + tegra->ehci->caps = hcd->regs + 0x100; err = usb_phy_init(hcd->phy); if (err) { @@ -711,7 +673,6 @@ static int tegra_ehci_probe(struct platform_device *pdev) } tegra->host_resumed = 1; - tegra->ehci = hcd_to_ehci(hcd); irq = platform_get_irq(pdev, 0); if (!irq) { @@ -785,6 +746,12 @@ static void tegra_ehci_hcd_shutdown(struct platform_device *pdev) struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev); struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci); + /* + * ehci_shutdown touches the USB controller registers, make sure + * controller has clocks to it + */ + if (!tegra->host_resumed) + tegra_ehci_power_up(hcd); if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } @@ -799,10 +766,40 @@ static struct platform_driver tegra_ehci_driver = { .remove = tegra_ehci_remove, .shutdown = tegra_ehci_hcd_shutdown, .driver = { - .name = "tegra-ehci", + .name = DRV_NAME, .of_match_table = tegra_ehci_of_match, #ifdef CONFIG_PM .pm = &tegra_ehci_pm_ops, #endif } }; + +static struct ehci_driver_overrides tegra_overrides __initdata = { + .extra_priv_size = sizeof(struct tegra_ehci_hcd), + .map_urb_for_dma = tegra_ehci_map_urb_for_dma, + .unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma, + .hub_control = tegra_ehci_hub_control, +}; + +static int __init ehci_tegra_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info(DRV_NAME ": " DRIVER_DESC "\n"); + + ehci_init_driver(&tegra_ehci_hc_driver, &tegra_overrides); + return platform_driver_register(&tegra_ehci_driver); +} +module_init(ehci_tegra_init); + +static void __exit ehci_tegra_cleanup(void) +{ + platform_driver_unregister(&tegra_ehci_driver); +} +module_exit(ehci_tegra_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DEVICE_TABLE(of, tegra_ehci_of_match); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
