// SPDX-License-Identifier: GPL-2.0-only /* * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI * * Copyright (C) 2011-2013 Texas Instruments Incorporated - https://www.ti.com * Author: Keshava Munegowda <[email protected]> * Author: Roger Quadros <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/platform_data/usb-omap.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/err.h> #include "omap-usb.h" #define USBHS_DRIVER_NAME … #define OMAP_EHCI_DEVICE … #define OMAP_OHCI_DEVICE … /* OMAP USBHOST Register addresses */ /* UHH Register Set */ #define OMAP_UHH_REVISION … #define OMAP_UHH_SYSCONFIG … #define OMAP_UHH_SYSCONFIG_MIDLEMODE … #define OMAP_UHH_SYSCONFIG_CACTIVITY … #define OMAP_UHH_SYSCONFIG_SIDLEMODE … #define OMAP_UHH_SYSCONFIG_ENAWAKEUP … #define OMAP_UHH_SYSCONFIG_SOFTRESET … #define OMAP_UHH_SYSCONFIG_AUTOIDLE … #define OMAP_UHH_SYSSTATUS … #define OMAP_UHH_HOSTCONFIG … #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS … #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS … #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS … #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS … #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN … #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN … #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN … #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN … #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS … #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS … #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS … #define OMAP4_UHH_HOSTCONFIG_APP_START_CLK … /* OMAP4-specific defines */ #define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR … #define OMAP4_UHH_SYSCONFIG_NOIDLE … #define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR … #define OMAP4_UHH_SYSCONFIG_NOSTDBY … #define OMAP4_UHH_SYSCONFIG_SOFTRESET … #define OMAP4_P1_MODE_CLEAR … #define OMAP4_P1_MODE_TLL … #define OMAP4_P1_MODE_HSIC … #define OMAP4_P2_MODE_CLEAR … #define OMAP4_P2_MODE_TLL … #define OMAP4_P2_MODE_HSIC … #define OMAP_UHH_DEBUG_CSR … /* Values of UHH_REVISION - Note: these are not given in the TRM */ #define OMAP_USBHS_REV1 … #define OMAP_USBHS_REV2 … #define is_omap_usbhs_rev1(x) … #define is_omap_usbhs_rev2(x) … #define is_ehci_phy_mode(x) … #define is_ehci_tll_mode(x) … #define is_ehci_hsic_mode(x) … struct usbhs_hcd_omap { … }; /*-------------------------------------------------------------------------*/ static const char usbhs_driver_name[] = …; static u64 usbhs_dmamask = …; /*-------------------------------------------------------------------------*/ static inline void usbhs_write(void __iomem *base, u32 reg, u32 val) { … } static inline u32 usbhs_read(void __iomem *base, u32 reg) { … } /*-------------------------------------------------------------------------*/ /* * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h> * to the device tree binding portN-mode found in * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt' */ static const char * const port_modes[] = …; static struct platform_device *omap_usbhs_alloc_child(const char *name, struct resource *res, int num_resources, void *pdata, size_t pdata_size, struct device *dev) { … } static int omap_usbhs_alloc_children(struct platform_device *pdev) { … } static bool is_ohci_port(enum usbhs_omap_port_mode pmode) { … } static int usbhs_runtime_resume(struct device *dev) { … } static int usbhs_runtime_suspend(struct device *dev) { … } static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap, unsigned reg) { … } static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap, unsigned reg) { … } static void omap_usbhs_init(struct device *dev) { … } static int usbhs_omap_get_dt_pdata(struct device *dev, struct usbhs_omap_platform_data *pdata) { … } static const struct of_device_id usbhs_child_match_table[] = …; /** * usbhs_omap_probe - initialize TI-based HCDs * * Allocates basic resources for this USB host controller. * * @pdev: Pointer to this device's platform device structure */ static int usbhs_omap_probe(struct platform_device *pdev) { … } static int usbhs_omap_remove_child(struct device *dev, void *data) { … } /** * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs * @pdev: USB Host Controller being removed * * Reverses the effect of usbhs_omap_probe(). */ static void usbhs_omap_remove(struct platform_device *pdev) { … } static const struct dev_pm_ops usbhsomap_dev_pm_ops = …; static const struct of_device_id usbhs_omap_dt_ids[] = …; MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids); static struct platform_driver usbhs_omap_driver = …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; static int omap_usbhs_drvinit(void) { … } /* * init before ehci and ohci drivers; * The usbhs core driver should be initialized much before * the omap ehci and ohci probe functions are called. * This usbhs core driver should be initialized after * usb tll driver */ fs_initcall_sync(omap_usbhs_drvinit); static void omap_usbhs_drvexit(void) { … } module_exit(omap_usbhs_drvexit);
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