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hc
2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/usb/chipidea/ci.h
....@@ -1,4 +1,4 @@
1
-// SPDX-License-Identifier: GPL-2.0
1
+/* SPDX-License-Identifier: GPL-2.0 */
22 /*
33  * ci.h - common structures, functions, and macros of the ChipIdea driver
44  *
....@@ -16,6 +16,7 @@
1616 #include <linux/usb/gadget.h>
1717 #include <linux/usb/otg-fsm.h>
1818 #include <linux/usb/otg.h>
19
+#include <linux/usb/role.h>
1920 #include <linux/ulpi/interface.h>
2021 
2122 /******************************************************************************
....@@ -24,6 +25,7 @@
2425 #define TD_PAGE_COUNT      5
2526 #define CI_HDRC_PAGE_SIZE  4096ul /* page size for TD's */
2627 #define ENDPT_MAX          32
28
+#define CI_MAX_BUF_SIZE	(TD_PAGE_COUNT * CI_HDRC_PAGE_SIZE)
2729 
2830 /******************************************************************************
2931  * REGISTERS
....@@ -202,6 +204,7 @@
202204  * @in_lpm: if the core in low power mode
203205  * @wakeup_int: if wakeup interrupt occur
204206  * @rev: The revision number for controller
207
+ * @mutex: protect code from concorrent running when doing role switch
205208  */
206209 struct ci_hdrc {
207210 	struct device			*dev;
....@@ -217,6 +220,7 @@
217220 	ktime_t				hr_timeouts[NUM_OTG_FSM_TIMERS];
218221 	unsigned			enabled_otg_timer_bits;
219222 	enum otg_fsm_timer		next_otg_timer;
223
+	struct usb_role_switch		*role_switch;
220224 	struct work_struct		work;
221225 	struct workqueue_struct		*wq;
222226 
....@@ -254,6 +258,7 @@
254258 	bool				in_lpm;
255259 	bool				wakeup_int;
256260 	enum ci_revision		rev;
261
+	struct mutex                    mutex;
257262 };
258263 
259264 static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci)
....@@ -290,6 +295,26 @@
290295 	ci->roles[role]->stop(ci);
291296 }
292297 
298
+static inline enum usb_role ci_role_to_usb_role(struct ci_hdrc *ci)
299
+{
300
+	if (ci->role == CI_ROLE_HOST)
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+		return USB_ROLE_HOST;
302
+	else if (ci->role == CI_ROLE_GADGET && ci->vbus_active)
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+		return USB_ROLE_DEVICE;
304
+	else
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+		return USB_ROLE_NONE;
306
+}
307
+
308
+static inline enum ci_role usb_role_to_ci_role(enum usb_role role)
309
+{
310
+	if (role == USB_ROLE_HOST)
311
+		return CI_ROLE_HOST;
312
+	else if (role == USB_ROLE_DEVICE)
313
+		return CI_ROLE_GADGET;
314
+	else
315
+		return CI_ROLE_END;
316
+}
317
+
293318 /**
294319  * hw_read_id_reg: reads from a identification register
295320  * @ci: the controller