Lines Matching +full:max3420 +full:- +full:udc
1 // SPDX-License-Identifier: GPL-2.0+
3 * MAX3420 Device Controller driver for USB.
6 * (C) Copyright 2019-2020 Linaro Ltd
38 #define MAX3420_SPI_DIR_RD 0 /* read register from MAX3420 */
39 #define MAX3420_SPI_DIR_WR 1 /* write register to MAX3420 */
159 struct max3420_udc *udc; member
191 #define DRIVER_DESC "MAX3420 USB Device-Mode Driver"
192 static const char driver_name[] = "max3420-udc";
201 static void spi_ack_ctrl(struct max3420_udc *udc) in spi_ack_ctrl() argument
203 struct spi_device *spi = udc->spi; in spi_ack_ctrl()
220 static u8 spi_rd8_ack(struct max3420_udc *udc, u8 reg, int actstat) in spi_rd8_ack() argument
222 struct spi_device *spi = udc->spi; in spi_rd8_ack()
242 static u8 spi_rd8(struct max3420_udc *udc, u8 reg) in spi_rd8() argument
244 return spi_rd8_ack(udc, reg, 0); in spi_rd8()
247 static void spi_wr8_ack(struct max3420_udc *udc, u8 reg, u8 val, int actstat) in spi_wr8_ack() argument
249 struct spi_device *spi = udc->spi; in spi_wr8_ack()
268 static void spi_wr8(struct max3420_udc *udc, u8 reg, u8 val) in spi_wr8() argument
270 spi_wr8_ack(udc, reg, val, 0); in spi_wr8()
273 static void spi_rd_buf(struct max3420_udc *udc, u8 reg, void *buf, u8 len) in spi_rd_buf() argument
275 struct spi_device *spi = udc->spi; in spi_rd_buf()
295 static void spi_wr_buf(struct max3420_udc *udc, u8 reg, void *buf, u8 len) in spi_wr_buf() argument
297 struct spi_device *spi = udc->spi; in spi_wr_buf()
318 struct max3420_udc *udc = ep->udc; in spi_max3420_enable() local
323 spin_lock_irqsave(&ep->lock, flags); in spi_max3420_enable()
324 todo = ep->todo & ENABLE_EP; in spi_max3420_enable()
325 ep->todo &= ~ENABLE_EP; in spi_max3420_enable()
326 spin_unlock_irqrestore(&ep->lock, flags); in spi_max3420_enable()
328 if (!todo || ep->id == 0) in spi_max3420_enable()
331 epien = spi_rd8(udc, MAX3420_REG_EPIEN); in spi_max3420_enable()
332 epdis = spi_rd8(udc, MAX3420_REG_CLRTOGS); in spi_max3420_enable()
335 epdis &= ~BIT(ep->id + 4); in spi_max3420_enable()
336 epien |= BIT(ep->id + 1); in spi_max3420_enable()
338 epdis |= BIT(ep->id + 4); in spi_max3420_enable()
339 epien &= ~BIT(ep->id + 1); in spi_max3420_enable()
342 spi_wr8(udc, MAX3420_REG_CLRTOGS, epdis); in spi_max3420_enable()
343 spi_wr8(udc, MAX3420_REG_EPIEN, epien); in spi_max3420_enable()
350 struct max3420_udc *udc = ep->udc; in spi_max3420_stall() local
355 spin_lock_irqsave(&ep->lock, flags); in spi_max3420_stall()
356 todo = ep->todo & STALL_EP; in spi_max3420_stall()
357 ep->todo &= ~STALL_EP; in spi_max3420_stall()
358 spin_unlock_irqrestore(&ep->lock, flags); in spi_max3420_stall()
360 if (!todo || ep->id == 0) in spi_max3420_stall()
363 epstalls = spi_rd8(udc, MAX3420_REG_EPSTALLS); in spi_max3420_stall()
365 ep->halted = 1; in spi_max3420_stall()
366 epstalls |= BIT(ep->id + 1); in spi_max3420_stall()
370 ep->halted = 0; in spi_max3420_stall()
371 epstalls &= ~BIT(ep->id + 1); in spi_max3420_stall()
372 clrtogs = spi_rd8(udc, MAX3420_REG_CLRTOGS); in spi_max3420_stall()
373 clrtogs |= BIT(ep->id + 1); in spi_max3420_stall()
374 spi_wr8(udc, MAX3420_REG_CLRTOGS, clrtogs); in spi_max3420_stall()
376 spi_wr8(udc, MAX3420_REG_EPSTALLS, epstalls | ACKSTAT); in spi_max3420_stall()
381 static int spi_max3420_rwkup(struct max3420_udc *udc) in spi_max3420_rwkup() argument
387 spin_lock_irqsave(&udc->lock, flags); in spi_max3420_rwkup()
388 wake_remote = udc->todo & REMOTE_WAKEUP; in spi_max3420_rwkup()
389 udc->todo &= ~REMOTE_WAKEUP; in spi_max3420_rwkup()
390 spin_unlock_irqrestore(&udc->lock, flags); in spi_max3420_rwkup()
392 if (!wake_remote || !udc->suspended) in spi_max3420_rwkup()
395 /* Set Remote-WkUp Signal*/ in spi_max3420_rwkup()
396 usbctl = spi_rd8(udc, MAX3420_REG_USBCTL); in spi_max3420_rwkup()
398 spi_wr8(udc, MAX3420_REG_USBCTL, usbctl); in spi_max3420_rwkup()
402 /* Clear Remote-WkUp Signal*/ in spi_max3420_rwkup()
403 usbctl = spi_rd8(udc, MAX3420_REG_USBCTL); in spi_max3420_rwkup()
405 spi_wr8(udc, MAX3420_REG_USBCTL, usbctl); in spi_max3420_rwkup()
407 udc->suspended = false; in spi_max3420_rwkup()
413 static void __max3420_stop(struct max3420_udc *udc) in __max3420_stop() argument
420 max3420_nuke(&udc->ep[i], -ECONNRESET); in __max3420_stop()
423 spi_wr8(udc, MAX3420_REG_CPUCTL, 0); in __max3420_stop()
425 val = spi_rd8(udc, MAX3420_REG_USBCTL); in __max3420_stop()
427 if (udc->is_selfpowered) in __max3420_stop()
431 spi_wr8(udc, MAX3420_REG_USBCTL, val); in __max3420_stop()
434 static void __max3420_start(struct max3420_udc *udc) in __max3420_start() argument
438 /* Need this delay if bus-powered, in __max3420_start()
439 * but even for self-powered it helps stability in __max3420_start()
444 spi_wr8(udc, MAX3420_REG_PINCTL, FDUPSPI); in __max3420_start()
447 spi_wr8(udc, MAX3420_REG_USBCTL, CHIPRES); in __max3420_start()
449 spi_wr8(udc, MAX3420_REG_USBCTL, 0); in __max3420_start()
453 val = spi_rd8(udc, MAX3420_REG_USBIRQ); in __max3420_start()
459 /* Enable PULL-UP only when Vbus detected */ in __max3420_start()
460 val = spi_rd8(udc, MAX3420_REG_USBCTL); in __max3420_start()
462 spi_wr8(udc, MAX3420_REG_USBCTL, val); in __max3420_start()
465 if (udc->is_selfpowered) in __max3420_start()
467 spi_wr8(udc, MAX3420_REG_USBIEN, val); in __max3420_start()
471 spi_wr8(udc, MAX3420_REG_EPIEN, val); in __max3420_start()
474 spi_wr8(udc, MAX3420_REG_CPUCTL, IE); in __max3420_start()
477 static int max3420_start(struct max3420_udc *udc) in max3420_start() argument
482 spin_lock_irqsave(&udc->lock, flags); in max3420_start()
483 todo = udc->todo & UDC_START; in max3420_start()
484 udc->todo &= ~UDC_START; in max3420_start()
485 spin_unlock_irqrestore(&udc->lock, flags); in max3420_start()
490 if (udc->vbus_active && udc->softconnect) in max3420_start()
491 __max3420_start(udc); in max3420_start()
493 __max3420_stop(udc); in max3420_start()
500 struct max3420_udc *udc = dev_id; in max3420_vbus_handler() local
503 spin_lock_irqsave(&udc->lock, flags); in max3420_vbus_handler()
505 udc->vbus_active = !udc->vbus_active; in max3420_vbus_handler()
506 udc->todo |= UDC_START; in max3420_vbus_handler()
507 usb_udc_vbus_handler(&udc->gadget, udc->vbus_active); in max3420_vbus_handler()
508 usb_gadget_set_state(&udc->gadget, udc->vbus_active in max3420_vbus_handler()
510 spin_unlock_irqrestore(&udc->lock, flags); in max3420_vbus_handler()
512 if (udc->thread_task && in max3420_vbus_handler()
513 udc->thread_task->state != TASK_RUNNING) in max3420_vbus_handler()
514 wake_up_process(udc->thread_task); in max3420_vbus_handler()
521 struct max3420_udc *udc = dev_id; in max3420_irq_handler() local
522 struct spi_device *spi = udc->spi; in max3420_irq_handler()
525 spin_lock_irqsave(&udc->lock, flags); in max3420_irq_handler()
526 if ((udc->todo & ENABLE_IRQ) == 0) { in max3420_irq_handler()
527 disable_irq_nosync(spi->irq); in max3420_irq_handler()
528 udc->todo |= ENABLE_IRQ; in max3420_irq_handler()
530 spin_unlock_irqrestore(&udc->lock, flags); in max3420_irq_handler()
532 if (udc->thread_task && in max3420_irq_handler()
533 udc->thread_task->state != TASK_RUNNING) in max3420_irq_handler()
534 wake_up_process(udc->thread_task); in max3420_irq_handler()
539 static void max3420_getstatus(struct max3420_udc *udc) in max3420_getstatus() argument
544 switch (udc->setup.bRequestType & USB_RECIP_MASK) { in max3420_getstatus()
547 status = udc->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED; in max3420_getstatus()
548 status |= (udc->remote_wkp << USB_DEVICE_REMOTE_WAKEUP); in max3420_getstatus()
551 if (udc->driver->setup(&udc->gadget, &udc->setup) < 0) in max3420_getstatus()
555 ep = &udc->ep[udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK]; in max3420_getstatus()
556 if (udc->setup.wIndex & USB_DIR_IN) { in max3420_getstatus()
557 if (!ep->ep_usb.caps.dir_in) in max3420_getstatus()
560 if (!ep->ep_usb.caps.dir_out) in max3420_getstatus()
563 if (ep->halted) in max3420_getstatus()
571 spi_wr_buf(udc, MAX3420_REG_EP0FIFO, &status, 2); in max3420_getstatus()
572 spi_wr8_ack(udc, MAX3420_REG_EP0BC, 2, 1); in max3420_getstatus()
575 dev_err(udc->dev, "Can't respond to getstatus request\n"); in max3420_getstatus()
576 spi_wr8(udc, MAX3420_REG_EPSTALLS, STLEP0IN | STLEP0OUT | STLSTAT); in max3420_getstatus()
579 static void max3420_set_clear_feature(struct max3420_udc *udc) in max3420_set_clear_feature() argument
582 int set = udc->setup.bRequest == USB_REQ_SET_FEATURE; in max3420_set_clear_feature()
586 switch (udc->setup.bRequestType) { in max3420_set_clear_feature()
588 if (udc->setup.wValue != USB_DEVICE_REMOTE_WAKEUP) in max3420_set_clear_feature()
591 if (udc->setup.bRequest == USB_REQ_SET_FEATURE) in max3420_set_clear_feature()
592 udc->remote_wkp = 1; in max3420_set_clear_feature()
594 udc->remote_wkp = 0; in max3420_set_clear_feature()
596 return spi_ack_ctrl(udc); in max3420_set_clear_feature()
599 if (udc->setup.wValue != USB_ENDPOINT_HALT) in max3420_set_clear_feature()
602 id = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK; in max3420_set_clear_feature()
603 ep = &udc->ep[id]; in max3420_set_clear_feature()
605 spin_lock_irqsave(&ep->lock, flags); in max3420_set_clear_feature()
606 ep->todo &= ~STALL_EP; in max3420_set_clear_feature()
608 ep->todo |= STALL; in max3420_set_clear_feature()
610 ep->todo |= UNSTALL; in max3420_set_clear_feature()
611 spin_unlock_irqrestore(&ep->lock, flags); in max3420_set_clear_feature()
619 dev_err(udc->dev, "Can't respond to SET/CLEAR FEATURE\n"); in max3420_set_clear_feature()
620 spi_wr8(udc, MAX3420_REG_EPSTALLS, STLEP0IN | STLEP0OUT | STLSTAT); in max3420_set_clear_feature()
623 static void max3420_handle_setup(struct max3420_udc *udc) in max3420_handle_setup() argument
627 spi_rd_buf(udc, MAX3420_REG_SUDFIFO, (void *)&setup, 8); in max3420_handle_setup()
629 udc->setup = setup; in max3420_handle_setup()
630 udc->setup.wValue = cpu_to_le16(setup.wValue); in max3420_handle_setup()
631 udc->setup.wIndex = cpu_to_le16(setup.wIndex); in max3420_handle_setup()
632 udc->setup.wLength = cpu_to_le16(setup.wLength); in max3420_handle_setup()
634 switch (udc->setup.bRequest) { in max3420_handle_setup()
636 /* Data+Status phase form udc */ in max3420_handle_setup()
637 if ((udc->setup.bRequestType & in max3420_handle_setup()
642 return max3420_getstatus(udc); in max3420_handle_setup()
644 /* Status phase from udc */ in max3420_handle_setup()
645 if (udc->setup.bRequestType != (USB_DIR_OUT | in max3420_handle_setup()
649 spi_rd8_ack(udc, MAX3420_REG_FNADDR, 1); in max3420_handle_setup()
650 dev_dbg(udc->dev, "Assigned Address=%d\n", udc->setup.wValue); in max3420_handle_setup()
654 /* Requests with no data phase, status phase from udc */ in max3420_handle_setup()
655 if ((udc->setup.bRequestType & USB_TYPE_MASK) in max3420_handle_setup()
658 return max3420_set_clear_feature(udc); in max3420_handle_setup()
663 if (udc->driver->setup(&udc->gadget, &setup) < 0) { in max3420_handle_setup()
665 spi_wr8(udc, MAX3420_REG_EPSTALLS, in max3420_handle_setup()
672 struct max3420_ep *ep = req->ep; in max3420_req_done()
673 struct max3420_udc *udc = ep->udc; in max3420_req_done() local
675 if (req->usb_req.status == -EINPROGRESS) in max3420_req_done()
676 req->usb_req.status = status; in max3420_req_done()
678 status = req->usb_req.status; in max3420_req_done()
680 if (status && status != -ESHUTDOWN) in max3420_req_done()
681 dev_err(udc->dev, "%s done %p, status %d\n", in max3420_req_done()
682 ep->ep_usb.name, req, status); in max3420_req_done()
684 if (req->usb_req.complete) in max3420_req_done()
685 req->usb_req.complete(&ep->ep_usb, &req->usb_req); in max3420_req_done()
688 static int max3420_do_data(struct max3420_udc *udc, int ep_id, int in) in max3420_do_data() argument
690 struct max3420_ep *ep = &udc->ep[ep_id]; in max3420_do_data()
695 if (list_empty(&ep->queue)) in max3420_do_data()
698 req = list_first_entry(&ep->queue, struct max3420_req, queue); in max3420_do_data()
699 buf = req->usb_req.buf + req->usb_req.actual; in max3420_do_data()
701 psz = ep->ep_usb.maxpacket; in max3420_do_data()
702 length = req->usb_req.length - req->usb_req.actual; in max3420_do_data()
713 spi_wr_buf(udc, MAX3420_REG_EP0FIFO + ep_id, buf, length); in max3420_do_data()
714 spi_wr8(udc, MAX3420_REG_EP0BC + ep_id, length); in max3420_do_data()
718 psz = spi_rd8(udc, MAX3420_REG_EP0BC + ep_id); in max3420_do_data()
721 spi_rd_buf(udc, MAX3420_REG_EP0FIFO + ep_id, buf, length); in max3420_do_data()
722 if (length < ep->ep_usb.maxpacket) in max3420_do_data()
726 req->usb_req.actual += length; in max3420_do_data()
728 if (req->usb_req.actual == req->usb_req.length) in max3420_do_data()
735 spin_lock_irqsave(&ep->lock, flags); in max3420_do_data()
736 list_del_init(&req->queue); in max3420_do_data()
737 spin_unlock_irqrestore(&ep->lock, flags); in max3420_do_data()
740 spi_ack_ctrl(udc); in max3420_do_data()
748 static int max3420_handle_irqs(struct max3420_udc *udc) in max3420_handle_irqs() argument
753 spi_rd_buf(udc, MAX3420_REG_EPIRQ, reg, 4); in max3420_handle_irqs()
763 spi_wr8(udc, MAX3420_REG_EPIRQ, SUDAVIRQ); in max3420_handle_irqs()
764 max3420_handle_setup(udc); in max3420_handle_irqs()
769 spi_wr8(udc, MAX3420_REG_USBIRQ, VBUSIRQ); in max3420_handle_irqs()
770 dev_dbg(udc->dev, "Cable plugged in\n"); in max3420_handle_irqs()
775 spi_wr8(udc, MAX3420_REG_USBIRQ, NOVBUSIRQ); in max3420_handle_irqs()
776 dev_dbg(udc->dev, "Cable pulled out\n"); in max3420_handle_irqs()
781 spi_wr8(udc, MAX3420_REG_USBIRQ, URESIRQ); in max3420_handle_irqs()
782 dev_dbg(udc->dev, "USB Reset - Start\n"); in max3420_handle_irqs()
787 spi_wr8(udc, MAX3420_REG_USBIRQ, URESDNIRQ); in max3420_handle_irqs()
788 dev_dbg(udc->dev, "USB Reset - END\n"); in max3420_handle_irqs()
789 spi_wr8(udc, MAX3420_REG_USBIEN, URESDNIRQ | URESIRQ); in max3420_handle_irqs()
790 spi_wr8(udc, MAX3420_REG_EPIEN, SUDAVIRQ | IN0BAVIRQ in max3420_handle_irqs()
796 spi_wr8(udc, MAX3420_REG_USBIRQ, SUSPIRQ); in max3420_handle_irqs()
797 dev_dbg(udc->dev, "USB Suspend - Enter\n"); in max3420_handle_irqs()
798 udc->suspended = true; in max3420_handle_irqs()
803 spi_wr8(udc, MAX3420_REG_USBIRQ, BUSACTIRQ); in max3420_handle_irqs()
804 dev_dbg(udc->dev, "USB Suspend - Exit\n"); in max3420_handle_irqs()
805 udc->suspended = false; in max3420_handle_irqs()
810 spi_wr8(udc, MAX3420_REG_USBIRQ, RWUDNIRQ); in max3420_handle_irqs()
811 dev_dbg(udc->dev, "Asked Host to wakeup\n"); in max3420_handle_irqs()
816 spi_wr8(udc, MAX3420_REG_USBIRQ, OSCOKIRQ); in max3420_handle_irqs()
817 dev_dbg(udc->dev, "Osc stabilized, start work\n"); in max3420_handle_irqs()
821 if (epirq & OUT0DAVIRQ && max3420_do_data(udc, 0, 0)) { in max3420_handle_irqs()
822 spi_wr8_ack(udc, MAX3420_REG_EPIRQ, OUT0DAVIRQ, 1); in max3420_handle_irqs()
826 if (epirq & IN0BAVIRQ && max3420_do_data(udc, 0, 1)) in max3420_handle_irqs()
829 if (epirq & OUT1DAVIRQ && max3420_do_data(udc, 1, 0)) { in max3420_handle_irqs()
830 spi_wr8_ack(udc, MAX3420_REG_EPIRQ, OUT1DAVIRQ, 1); in max3420_handle_irqs()
834 if (epirq & IN2BAVIRQ && max3420_do_data(udc, 2, 1)) in max3420_handle_irqs()
837 if (epirq & IN3BAVIRQ && max3420_do_data(udc, 3, 1)) in max3420_handle_irqs()
845 struct max3420_udc *udc = dev_id; in max3420_thread() local
846 struct spi_device *spi = udc->spi; in max3420_thread()
856 spin_lock_irqsave(&udc->lock, flags); in max3420_thread()
857 if (udc->todo & ENABLE_IRQ) { in max3420_thread()
858 enable_irq(spi->irq); in max3420_thread()
859 udc->todo &= ~ENABLE_IRQ; in max3420_thread()
861 spin_unlock_irqrestore(&udc->lock, flags); in max3420_thread()
867 mutex_lock(&udc->spi_bus_mutex); in max3420_thread()
869 /* If bus-vbus_active and disconnected */ in max3420_thread()
870 if (!udc->vbus_active || !udc->softconnect) in max3420_thread()
873 if (max3420_start(udc)) { in max3420_thread()
878 if (max3420_handle_irqs(udc)) { in max3420_thread()
883 if (spi_max3420_rwkup(udc)) { in max3420_thread()
888 max3420_do_data(udc, 0, 1); /* get done with the EP0 ZLP */ in max3420_thread()
891 struct max3420_ep *ep = &udc->ep[i]; in max3420_thread()
899 mutex_unlock(&udc->spi_bus_mutex); in max3420_thread()
903 dev_info(udc->dev, "SPI thread exiting\n"); in max3420_thread()
910 struct max3420_udc *udc = ep->udc; in max3420_ep_set_halt() local
913 spin_lock_irqsave(&ep->lock, flags); in max3420_ep_set_halt()
915 ep->todo &= ~STALL_EP; in max3420_ep_set_halt()
917 ep->todo |= STALL; in max3420_ep_set_halt()
919 ep->todo |= UNSTALL; in max3420_ep_set_halt()
921 spin_unlock_irqrestore(&ep->lock, flags); in max3420_ep_set_halt()
923 wake_up_process(udc->thread_task); in max3420_ep_set_halt()
925 dev_dbg(udc->dev, "%sStall %s\n", stall ? "" : "Un", ep->name); in max3420_ep_set_halt()
935 spin_lock_irqsave(&ep->lock, flags); in __max3420_ep_enable()
936 ep->ep_usb.desc = desc; in __max3420_ep_enable()
937 ep->ep_usb.maxpacket = maxp; in __max3420_ep_enable()
939 ep->todo &= ~ENABLE_EP; in __max3420_ep_enable()
940 ep->todo |= ENABLE; in __max3420_ep_enable()
941 spin_unlock_irqrestore(&ep->lock, flags); in __max3420_ep_enable()
950 struct max3420_udc *udc = ep->udc; in max3420_ep_enable() local
954 wake_up_process(udc->thread_task); in max3420_ep_enable()
964 spin_lock_irqsave(&ep->lock, flags); in max3420_nuke()
966 list_for_each_entry_safe(req, r, &ep->queue, queue) { in max3420_nuke()
967 list_del_init(&req->queue); in max3420_nuke()
969 spin_unlock_irqrestore(&ep->lock, flags); in max3420_nuke()
971 spin_lock_irqsave(&ep->lock, flags); in max3420_nuke()
974 spin_unlock_irqrestore(&ep->lock, flags); in max3420_nuke()
979 struct max3420_udc *udc = ep->udc; in __max3420_ep_disable() local
982 spin_lock_irqsave(&ep->lock, flags); in __max3420_ep_disable()
984 ep->ep_usb.desc = NULL; in __max3420_ep_disable()
986 ep->todo &= ~ENABLE_EP; in __max3420_ep_disable()
987 ep->todo |= DISABLE; in __max3420_ep_disable()
989 spin_unlock_irqrestore(&ep->lock, flags); in __max3420_ep_disable()
991 dev_dbg(udc->dev, "Disabled %s\n", ep->name); in __max3420_ep_disable()
997 struct max3420_udc *udc = ep->udc; in max3420_ep_disable() local
999 max3420_nuke(ep, -ESHUTDOWN); in max3420_ep_disable()
1003 wake_up_process(udc->thread_task); in max3420_ep_disable()
1018 req->ep = ep; in max3420_alloc_request()
1020 return &req->usb_req; in max3420_alloc_request()
1033 struct max3420_udc *udc = ep->udc; in max3420_ep_queue() local
1036 _req->status = -EINPROGRESS; in max3420_ep_queue()
1037 _req->actual = 0; in max3420_ep_queue()
1039 spin_lock_irqsave(&ep->lock, flags); in max3420_ep_queue()
1040 list_add_tail(&req->queue, &ep->queue); in max3420_ep_queue()
1041 spin_unlock_irqrestore(&ep->lock, flags); in max3420_ep_queue()
1043 wake_up_process(udc->thread_task); in max3420_ep_queue()
1053 spin_lock_irqsave(&ep->lock, flags); in max3420_ep_dequeue()
1056 list_for_each_entry(t, &ep->queue, queue) in max3420_ep_dequeue()
1058 list_del_init(&req->queue); in max3420_ep_dequeue()
1062 spin_unlock_irqrestore(&ep->lock, flags); in max3420_ep_dequeue()
1065 max3420_req_done(req, -ECONNRESET); in max3420_ep_dequeue()
1082 struct max3420_udc *udc = to_udc(gadget); in max3420_wakeup() local
1084 int ret = -EINVAL; in max3420_wakeup()
1086 spin_lock_irqsave(&udc->lock, flags); in max3420_wakeup()
1089 if (udc->remote_wkp) { in max3420_wakeup()
1090 udc->todo |= REMOTE_WAKEUP; in max3420_wakeup()
1094 spin_unlock_irqrestore(&udc->lock, flags); in max3420_wakeup()
1096 if (udc->thread_task && in max3420_wakeup()
1097 udc->thread_task->state != TASK_RUNNING) in max3420_wakeup()
1098 wake_up_process(udc->thread_task); in max3420_wakeup()
1105 struct max3420_udc *udc = to_udc(gadget); in max3420_udc_start() local
1108 spin_lock_irqsave(&udc->lock, flags); in max3420_udc_start()
1110 driver->driver.bus = NULL; in max3420_udc_start()
1111 udc->driver = driver; in max3420_udc_start()
1112 udc->gadget.speed = USB_SPEED_FULL; in max3420_udc_start()
1114 udc->gadget.is_selfpowered = udc->is_selfpowered; in max3420_udc_start()
1115 udc->remote_wkp = 0; in max3420_udc_start()
1116 udc->softconnect = true; in max3420_udc_start()
1117 udc->todo |= UDC_START; in max3420_udc_start()
1118 spin_unlock_irqrestore(&udc->lock, flags); in max3420_udc_start()
1120 if (udc->thread_task && in max3420_udc_start()
1121 udc->thread_task->state != TASK_RUNNING) in max3420_udc_start()
1122 wake_up_process(udc->thread_task); in max3420_udc_start()
1129 struct max3420_udc *udc = to_udc(gadget); in max3420_udc_stop() local
1132 spin_lock_irqsave(&udc->lock, flags); in max3420_udc_stop()
1133 udc->is_selfpowered = udc->gadget.is_selfpowered; in max3420_udc_stop()
1134 udc->gadget.speed = USB_SPEED_UNKNOWN; in max3420_udc_stop()
1135 udc->driver = NULL; in max3420_udc_stop()
1136 udc->softconnect = false; in max3420_udc_stop()
1137 udc->todo |= UDC_START; in max3420_udc_stop()
1138 spin_unlock_irqrestore(&udc->lock, flags); in max3420_udc_stop()
1140 if (udc->thread_task && in max3420_udc_stop()
1141 udc->thread_task->state != TASK_RUNNING) in max3420_udc_stop()
1142 wake_up_process(udc->thread_task); in max3420_udc_stop()
1153 static void max3420_eps_init(struct max3420_udc *udc) in max3420_eps_init() argument
1157 INIT_LIST_HEAD(&udc->gadget.ep_list); in max3420_eps_init()
1160 struct max3420_ep *ep = &udc->ep[idx]; in max3420_eps_init()
1162 spin_lock_init(&ep->lock); in max3420_eps_init()
1163 INIT_LIST_HEAD(&ep->queue); in max3420_eps_init()
1165 ep->udc = udc; in max3420_eps_init()
1166 ep->id = idx; in max3420_eps_init()
1167 ep->halted = 0; in max3420_eps_init()
1168 ep->maxpacket = 0; in max3420_eps_init()
1169 ep->ep_usb.name = ep->name; in max3420_eps_init()
1170 ep->ep_usb.ops = &max3420_ep_ops; in max3420_eps_init()
1171 usb_ep_set_maxpacket_limit(&ep->ep_usb, MAX3420_EP_MAX_PACKET); in max3420_eps_init()
1174 ep->ep_usb.desc = &ep0_desc; in max3420_eps_init()
1175 ep->ep_usb.maxpacket = usb_endpoint_maxp(&ep0_desc); in max3420_eps_init()
1176 ep->ep_usb.caps.type_control = true; in max3420_eps_init()
1177 ep->ep_usb.caps.dir_in = true; in max3420_eps_init()
1178 ep->ep_usb.caps.dir_out = true; in max3420_eps_init()
1179 snprintf(ep->name, MAX3420_EPNAME_SIZE, "ep0"); in max3420_eps_init()
1184 ep->ep_usb.caps.dir_in = false; in max3420_eps_init()
1185 ep->ep_usb.caps.dir_out = true; in max3420_eps_init()
1186 snprintf(ep->name, MAX3420_EPNAME_SIZE, "ep1-bulk-out"); in max3420_eps_init()
1188 ep->ep_usb.caps.dir_in = true; in max3420_eps_init()
1189 ep->ep_usb.caps.dir_out = false; in max3420_eps_init()
1190 snprintf(ep->name, MAX3420_EPNAME_SIZE, in max3420_eps_init()
1191 "ep%d-bulk-in", idx); in max3420_eps_init()
1193 ep->ep_usb.caps.type_iso = false; in max3420_eps_init()
1194 ep->ep_usb.caps.type_int = false; in max3420_eps_init()
1195 ep->ep_usb.caps.type_bulk = true; in max3420_eps_init()
1197 list_add_tail(&ep->ep_usb.ep_list, in max3420_eps_init()
1198 &udc->gadget.ep_list); in max3420_eps_init()
1204 struct max3420_udc *udc; in max3420_probe() local
1208 if (spi->master->flags & SPI_MASTER_HALF_DUPLEX) { in max3420_probe()
1209 dev_err(&spi->dev, "UDC needs full duplex to work\n"); in max3420_probe()
1210 return -EINVAL; in max3420_probe()
1213 spi->mode = SPI_MODE_3; in max3420_probe()
1214 spi->bits_per_word = 8; in max3420_probe()
1218 dev_err(&spi->dev, "Unable to setup SPI bus\n"); in max3420_probe()
1219 return -EFAULT; in max3420_probe()
1222 udc = devm_kzalloc(&spi->dev, sizeof(*udc), GFP_KERNEL); in max3420_probe()
1223 if (!udc) in max3420_probe()
1224 return -ENOMEM; in max3420_probe()
1226 udc->spi = spi; in max3420_probe()
1228 udc->remote_wkp = 0; in max3420_probe()
1231 udc->gadget.ops = &max3420_udc_ops; in max3420_probe()
1232 udc->gadget.max_speed = USB_SPEED_FULL; in max3420_probe()
1233 udc->gadget.speed = USB_SPEED_UNKNOWN; in max3420_probe()
1234 udc->gadget.ep0 = &udc->ep[0].ep_usb; in max3420_probe()
1235 udc->gadget.name = driver_name; in max3420_probe()
1237 spin_lock_init(&udc->lock); in max3420_probe()
1238 mutex_init(&udc->spi_bus_mutex); in max3420_probe()
1240 udc->ep0req.ep = &udc->ep[0]; in max3420_probe()
1241 udc->ep0req.usb_req.buf = udc->ep0buf; in max3420_probe()
1242 INIT_LIST_HEAD(&udc->ep0req.queue); in max3420_probe()
1245 max3420_eps_init(udc); in max3420_probe()
1248 spi_rd_buf(udc, MAX3420_REG_EPIRQ, reg, 8); in max3420_probe()
1249 spi_wr8(udc, MAX3420_REG_PINCTL, FDUPSPI); in max3420_probe()
1251 err = usb_add_gadget_udc(&spi->dev, &udc->gadget); in max3420_probe()
1255 udc->dev = &udc->gadget.dev; in max3420_probe()
1257 spi_set_drvdata(spi, udc); in max3420_probe()
1259 irq = of_irq_get_byname(spi->dev.of_node, "udc"); in max3420_probe()
1260 err = devm_request_irq(&spi->dev, irq, max3420_irq_handler, 0, in max3420_probe()
1261 "max3420", udc); in max3420_probe()
1265 udc->thread_task = kthread_create(max3420_thread, udc, in max3420_probe()
1266 "max3420-thread"); in max3420_probe()
1267 if (IS_ERR(udc->thread_task)) in max3420_probe()
1268 return PTR_ERR(udc->thread_task); in max3420_probe()
1270 irq = of_irq_get_byname(spi->dev.of_node, "vbus"); in max3420_probe()
1271 if (irq <= 0) { /* no vbus irq implies self-powered design */ in max3420_probe()
1272 udc->is_selfpowered = 1; in max3420_probe()
1273 udc->vbus_active = true; in max3420_probe()
1274 udc->todo |= UDC_START; in max3420_probe()
1275 usb_udc_vbus_handler(&udc->gadget, udc->vbus_active); in max3420_probe()
1276 usb_gadget_set_state(&udc->gadget, USB_STATE_POWERED); in max3420_probe()
1277 max3420_start(udc); in max3420_probe()
1279 udc->is_selfpowered = 0; in max3420_probe()
1281 spi_rd_buf(udc, MAX3420_REG_EPIRQ, reg, 8); in max3420_probe()
1283 udc->vbus_active = true; in max3420_probe()
1285 err = devm_request_irq(&spi->dev, irq, in max3420_probe()
1286 max3420_vbus_handler, 0, "vbus", udc); in max3420_probe()
1296 struct max3420_udc *udc = spi_get_drvdata(spi); in max3420_remove() local
1299 usb_del_gadget_udc(&udc->gadget); in max3420_remove()
1301 spin_lock_irqsave(&udc->lock, flags); in max3420_remove()
1303 kthread_stop(udc->thread_task); in max3420_remove()
1305 spin_unlock_irqrestore(&udc->lock, flags); in max3420_remove()
1311 { .compatible = "maxim,max3420-udc"},
1312 { .compatible = "maxim,max3421-udc"},
1319 .name = "max3420-udc",