Lines Matching full:udc
159 struct max3420_udc *udc; member
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
331 epien = spi_rd8(udc, MAX3420_REG_EPIEN); in spi_max3420_enable()
332 epdis = spi_rd8(udc, MAX3420_REG_CLRTOGS); 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
363 epstalls = spi_rd8(udc, MAX3420_REG_EPSTALLS); in spi_max3420_stall()
372 clrtogs = spi_rd8(udc, MAX3420_REG_CLRTOGS); 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()
396 usbctl = spi_rd8(udc, MAX3420_REG_USBCTL); in spi_max3420_rwkup()
398 spi_wr8(udc, MAX3420_REG_USBCTL, usbctl); 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
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()
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()
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()
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()
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()
673 struct max3420_udc *udc = ep->udc; in max3420_req_done() local
681 dev_err(udc->dev, "%s done %p, status %d\n", 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()
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()
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()
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()
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
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()
950 struct max3420_udc *udc = ep->udc; in max3420_ep_enable() local
954 wake_up_process(udc->thread_task); in max3420_ep_enable()
979 struct max3420_udc *udc = ep->udc; in __max3420_ep_disable() local
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
1003 wake_up_process(udc->thread_task); in max3420_ep_disable()
1033 struct max3420_udc *udc = ep->udc; in max3420_ep_queue() local
1043 wake_up_process(udc->thread_task); in max3420_ep_queue()
1082 struct max3420_udc *udc = to_udc(gadget); in max3420_wakeup() local
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()
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()
1165 ep->udc = udc; in max3420_eps_init()
1198 &udc->gadget.ep_list); in max3420_eps_init()
1204 struct max3420_udc *udc; in max3420_probe() local
1209 dev_err(&spi->dev, "UDC needs full duplex to work\n"); in max3420_probe()
1222 udc = devm_kzalloc(&spi->dev, sizeof(*udc), GFP_KERNEL); in max3420_probe()
1223 if (!udc) 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()
1261 "max3420", udc); in max3420_probe()
1265 udc->thread_task = kthread_create(max3420_thread, udc, in max3420_probe()
1267 if (IS_ERR(udc->thread_task)) in max3420_probe()
1268 return PTR_ERR(udc->thread_task); 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()
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",