xref: /openbmc/linux/include/linux/usb/chipidea.h (revision cff3608e)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Platform data for the chipidea USB dual role controller
 */

#ifndef __LINUX_USB_CHIPIDEA_H
#define __LINUX_USB_CHIPIDEA_H

#include <linux/extcon.h>
#include <linux/usb/otg.h>

struct ci_hdrc;

/**
 * struct ci_hdrc_cable - structure for external connector cable state tracking
 * @connected: true if cable is connected, false otherwise
 * @changed: set to true when extcon event happen
 * @enabled: set to true if we've enabled the vbus or id interrupt
 * @edev: device which generate events
 * @ci: driver state of the chipidea device
 * @nb: hold event notification callback
 * @conn: used for notification registration
 */
struct ci_hdrc_cable {
	bool				connected;
	bool				changed;
	bool				enabled;
	struct extcon_dev		*edev;
	struct ci_hdrc			*ci;
	struct notifier_block		nb;
};

struct ci_hdrc_platform_data {
	const char	*name;
	/* offset of the capability registers */
	uintptr_t	 capoffset;
	unsigned	 power_budget;
	struct phy	*phy;
	/* old usb_phy interface */
	struct usb_phy	*usb_phy;
	enum usb_phy_interface phy_mode;
	unsigned long	 flags;
#define CI_HDRC_REGS_SHARED		BIT(0)
#define CI_HDRC_DISABLE_DEVICE_STREAMING	BIT(1)
#define CI_HDRC_SUPPORTS_RUNTIME_PM	BIT(2)
#define CI_HDRC_DISABLE_HOST_STREAMING	BIT(3)
#define CI_HDRC_DISABLE_STREAMING (CI_HDRC_DISABLE_DEVICE_STREAMING |	\
		CI_HDRC_DISABLE_HOST_STREAMING)
	/*
	 * Only set it when DCCPARAMS.DC==1 and DCCPARAMS.HC==1,
	 * but otg is not supported (no register otgsc).
	 */
#define CI_HDRC_DUAL_ROLE_NOT_OTG	BIT(4)
#define CI_HDRC_IMX28_WRITE_FIX		BIT(5)
#define CI_HDRC_FORCE_FULLSPEED		BIT(6)
#define CI_HDRC_TURN_VBUS_EARLY_ON	BIT(7)
#define CI_HDRC_SET_NON_ZERO_TTHA	BIT(8)
#define CI_HDRC_OVERRIDE_AHB_BURST	BIT(9)
#define CI_HDRC_OVERRIDE_TX_BURST	BIT(10)
#define CI_HDRC_OVERRIDE_RX_BURST	BIT(11)
#define CI_HDRC_OVERRIDE_PHY_CONTROL	BIT(12) /* Glue layer manages phy */
#define CI_HDRC_REQUIRES_ALIGNED_DMA	BIT(13)
#define CI_HDRC_IMX_IS_HSIC		BIT(14)
#define CI_HDRC_PMQOS			BIT(15)
#define CI_HDRC_PHY_VBUS_CONTROL	BIT(16)
#define CI_HDRC_HAS_PORTSC_PEC_MISSED	BIT(17)
#define CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS	BIT(18)
	enum usb_dr_mode	dr_mode;
#define CI_HDRC_CONTROLLER_RESET_EVENT		0
#define CI_HDRC_CONTROLLER_STOPPED_EVENT	1
#define CI_HDRC_IMX_HSIC_ACTIVE_EVENT		2
#define CI_HDRC_IMX_HSIC_SUSPEND_EVENT		3
#define CI_HDRC_CONTROLLER_VBUS_EVENT		4
	int	(*notify_event) (struct ci_hdrc *ci, unsigned event);
	struct regulator	*reg_vbus;
	struct usb_otg_caps	ci_otg_caps;
	bool			tpl_support;
	/* interrupt threshold setting */
	u32			itc_setting;
	u32			ahb_burst_config;
	u32			tx_burst_size;
	u32			rx_burst_size;

	/* VBUS and ID signal state tracking, using extcon framework */
	struct ci_hdrc_cable		vbus_extcon;
	struct ci_hdrc_cable		id_extcon;
	u32			phy_clkgate_delay_us;

	/* pins */
	struct pinctrl *pctl;
	struct pinctrl_state *pins_default;
	struct pinctrl_state *pins_host;
	struct pinctrl_state *pins_device;

	/* platform-specific hooks */
	int (*hub_control)(struct ci_hdrc *ci, u16 typeReq, u16 wValue,
			   u16 wIndex, char *buf, u16 wLength,
			   bool *done, unsigned long *flags);
	void (*enter_lpm)(struct ci_hdrc *ci, bool enable);
};

/* Default offset of capability registers */
#define DEF_CAPOFFSET		0x100

/* Add ci hdrc device */
struct platform_device *ci_hdrc_add_device(struct device *dev,
			struct resource *res, int nres,
			struct ci_hdrc_platform_data *platdata);
/* Remove ci hdrc device */
void ci_hdrc_remove_device(struct platform_device *pdev);
/* Get current available role */
enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev);

#endif