21 #include <linux/usb/otg.h>
28 #define	DRIVER_DESC	"Marvell USB OTG transceiver driver"
33 static const char driver_name[] = "mv-otg";
52 static int mv_otg_set_vbus(struct usb_otg *otg, bool on)  in mv_otg_set_vbus()  argument
54 	struct mv_otg *mvotg = container_of(otg->usb_phy, struct mv_otg, phy);  in mv_otg_set_vbus()
61 static int mv_otg_set_host(struct usb_otg *otg,  in mv_otg_set_host()  argument
64 	otg->host = host;  in mv_otg_set_host()
69 static int mv_otg_set_peripheral(struct usb_otg *otg,  in mv_otg_set_peripheral()  argument
72 	otg->gadget = gadget;  in mv_otg_set_peripheral()
194 	struct usb_otg *otg = mvotg->phy.otg;  in mv_otg_start_host()  local
197 	if (!otg->host)  in mv_otg_start_host()
202 	hcd = bus_to_hcd(otg->host);  in mv_otg_start_host()
215 	struct usb_otg *otg = mvotg->phy.otg;  in mv_otg_start_periphrals()  local
217 	if (!otg->gadget)  in mv_otg_start_periphrals()
223 		usb_gadget_vbus_connect(otg->gadget);  in mv_otg_start_periphrals()
225 		usb_gadget_vbus_disconnect(otg->gadget);  in mv_otg_start_periphrals()
245 	dev_dbg(&mvotg->pdev->dev, "otg enabled\n");  in mv_otg_enable_internal()
274 		dev_dbg(&mvotg->pdev->dev, "otg disabled\n");  in mv_otg_disable_internal()
330 	int old_state = mvotg->phy.otg->state;  in mv_otg_update_state()
334 		mvotg->phy.otg->state = OTG_STATE_B_IDLE;  in mv_otg_update_state()
338 			mvotg->phy.otg->state = OTG_STATE_A_IDLE;  in mv_otg_update_state()
340 			mvotg->phy.otg->state = OTG_STATE_B_PERIPHERAL;  in mv_otg_update_state()
344 			mvotg->phy.otg->state = OTG_STATE_B_IDLE;  in mv_otg_update_state()
348 			mvotg->phy.otg->state = OTG_STATE_B_IDLE;  in mv_otg_update_state()
351 			mvotg->phy.otg->state = OTG_STATE_A_WAIT_VRISE;  in mv_otg_update_state()
355 			mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON;  in mv_otg_update_state()
362 			mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL;  in mv_otg_update_state()
367 			mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR;  in mv_otg_update_state()
371 			mvotg->phy.otg->state = OTG_STATE_A_HOST;  in mv_otg_update_state()
377 			mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON;  in mv_otg_update_state()
379 			mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR;  in mv_otg_update_state()
385 			mvotg->phy.otg->state = OTG_STATE_A_IDLE;  in mv_otg_update_state()
391 			mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL;  in mv_otg_update_state()
402 	struct usb_otg *otg;  in mv_otg_work()  local
409 	otg = mvotg->phy.otg;  in mv_otg_work()
410 	old_state = otg->state;  in mv_otg_work()
418 	if (old_state != mvotg->phy.otg->state) {  in mv_otg_work()
421 			 state_string[mvotg->phy.otg->state]);  in mv_otg_work()
423 		switch (mvotg->phy.otg->state) {  in mv_otg_work()
425 			otg->default_a = 0;  in mv_otg_work()
438 			otg->default_a = 1;  in mv_otg_work()
445 			mv_otg_set_vbus(otg, 1);  in mv_otg_work()
466 			mv_otg_set_vbus(otg, 0);  in mv_otg_work()
535 	if (mvotg->phy.otg->state != OTG_STATE_B_IDLE  in a_bus_req_store()
536 	    && mvotg->phy.otg->state != OTG_STATE_A_IDLE)  in a_bus_req_store()
565 	if (!mvotg->phy.otg->default_a)  in a_clr_err_store()
601 	if (!mvotg->phy.otg->default_a)  in a_bus_drop_store()
665 	struct usb_otg *otg;  in mv_otg_probe()  local
678 	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);  in mv_otg_probe()
679 	if (!otg)  in mv_otg_probe()
693 		dev_dbg(&pdev->dev, "cannot create workqueue for OTG\n");  in mv_otg_probe()
699 	/* OTG common part */  in mv_otg_probe()
702 	mvotg->phy.otg = otg;  in mv_otg_probe()
705 	otg->state = OTG_STATE_UNDEFINED;  in mv_otg_probe()
706 	otg->usb_phy = &mvotg->phy;  in mv_otg_probe()
707 	otg->set_host = mv_otg_set_host;  in mv_otg_probe()
708 	otg->set_peripheral = mv_otg_set_peripheral;  in mv_otg_probe()
709 	otg->set_vbus = mv_otg_set_vbus;  in mv_otg_probe()
748 		dev_err(&pdev->dev, "mv otg enable error %d\n", retval);  in mv_otg_probe()
797 		dev_err(&pdev->dev, "Request irq %d for OTG failed\n",  in mv_otg_probe()
818 		 "successful probe OTG device %s clock gating.\n",  in mv_otg_probe()
836 	if (mvotg->phy.otg->state != OTG_STATE_B_IDLE) {  in mv_otg_suspend()
838 			 "OTG state is not B_IDLE, it is %d!\n",  in mv_otg_suspend()
839 			 mvotg->phy.otg->state);  in mv_otg_suspend()