1 /* SPDX-License-Identifier: GPL-2.0 */
3  * ci.h - common structures, functions, and macros of the ChipIdea driver
5  * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
17 #include <linux/usb/otg-fsm.h>
19 #include <linux/usb/role.h>
76  * struct ci_hw_ep - endpoint representation
127  * struct ci_role_driver - host/gadget role driver
128  * @start: start this role
129  * @stop: stop this role
130  * @suspend: system suspend handler for this role
131  * @resume: system resume handler for this role
132  * @irq: irq handler for this role
133  * @name: role name string (host/gadget)
145  * struct hw_bank - hardware register mapping representation
165  * struct ci_hdrc - chipidea device representation
171  * @role: current role
172  * @is_otg: if the device is otg-capable
178  * @work: work for role changing
193  * @remote_wakeup: host-enabled remote wakeup
211  * @mutex: protect code from concorrent running when doing role switch
219 	enum ci_role			role;  member
270 	BUG_ON(ci->role >= CI_ROLE_END || !ci->roles[ci->role]);  in ci_role()
271 	return ci->roles[ci->role];  in ci_role()
274 static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role)  in ci_role_start()  argument
278 	if (role >= CI_ROLE_END)  in ci_role_start()
279 		return -EINVAL;  in ci_role_start()
281 	if (!ci->roles[role])  in ci_role_start()
282 		return -ENXIO;  in ci_role_start()
284 	ret = ci->roles[role]->start(ci);  in ci_role_start()
288 	ci->role = role;  in ci_role_start()
290 	if (ci->usb_phy) {  in ci_role_start()
291 		if (role == CI_ROLE_HOST)  in ci_role_start()
292 			usb_phy_set_event(ci->usb_phy, USB_EVENT_ID);  in ci_role_start()
295 			usb_phy_set_event(ci->usb_phy, USB_EVENT_NONE);  in ci_role_start()
303 	enum ci_role role = ci->role;  in ci_role_stop()  local
305 	if (role == CI_ROLE_END)  in ci_role_stop()
308 	ci->role = CI_ROLE_END;  in ci_role_stop()
310 	ci->roles[role]->stop(ci);  in ci_role_stop()
312 	if (ci->usb_phy)  in ci_role_stop()
313 		usb_phy_set_event(ci->usb_phy, USB_EVENT_NONE);  in ci_role_stop()
318 	if (ci->role == CI_ROLE_HOST)  in ci_role_to_usb_role()
320 	else if (ci->role == CI_ROLE_GADGET && ci->vbus_active)  in ci_role_to_usb_role()
326 static inline enum ci_role usb_role_to_ci_role(enum usb_role role)  in usb_role_to_ci_role()  argument
328 	if (role == USB_ROLE_HOST)  in usb_role_to_ci_role()
330 	else if (role == USB_ROLE_DEVICE)  in usb_role_to_ci_role()
346 	return ioread32(ci->hw_bank.abs + offset) & mask;  in hw_read_id_reg()
354  * @data: new value
357 			    u32 mask, u32 data)  in hw_write_id_reg()  argument
360 		data = (ioread32(ci->hw_bank.abs + offset) & ~mask)  in hw_write_id_reg()
361 			| (data & mask);  in hw_write_id_reg()
363 	iowrite32(data, ci->hw_bank.abs + offset);  in hw_write_id_reg()
376 	return ioread32(ci->hw_bank.regmap[reg]) & mask;  in hw_read()
393 	if (ci->imx28_write_fix)  in __hw_write()
404  * @data: new value
407 			    u32 mask, u32 data)  in hw_write()  argument
410 		data = (ioread32(ci->hw_bank.regmap[reg]) & ~mask)  in hw_write()
411 			| (data & mask);  in hw_write()
413 	__hw_write(ci, data, ci->hw_bank.regmap[reg]);  in hw_write()
427 	u32 val = ioread32(ci->hw_bank.regmap[reg]) & mask;  in hw_test_and_clear()
429 	__hw_write(ci, val, ci->hw_bank.regmap[reg]);  in hw_test_and_clear()
438  * @data: new value
443 				    u32 mask, u32 data)  in hw_test_and_write()  argument
447 	hw_write(ci, reg, mask, data);  in hw_test_and_write()
460 	struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps;  in ci_otg_is_fsm_mode()
462 	return ci->is_otg && ci->roles[CI_ROLE_HOST] &&  in ci_otg_is_fsm_mode()
463 		ci->roles[CI_ROLE_GADGET] && (otg_caps->srp_support ||  in ci_otg_is_fsm_mode()
464 		otg_caps->hnp_support || otg_caps->adp_support);  in ci_otg_is_fsm_mode()