diff options
Diffstat (limited to 'drivers/usb/gadget/at91_udc.c')
| -rw-r--r-- | drivers/usb/gadget/at91_udc.c | 1534 |
1 files changed, 0 insertions, 1534 deletions
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c deleted file mode 100644 index 411464690d..0000000000 --- a/drivers/usb/gadget/at91_udc.c +++ /dev/null @@ -1,1534 +0,0 @@ -/* - * at91_udc -- driver for at91-series USB peripheral controller - * - * Copyright (C) 2004 by Thomas Rathbone - * Copyright (C) 2005 by HP Labs - * Copyright (C) 2005 by David Brownell - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#undef VERBOSE_DEBUG -#undef PACKET_TRACE - -#include <common.h> -#include <errno.h> -#include <init.h> -#include <gpio.h> -#include <io.h> -#include <clock.h> -#include <usb/ch9.h> -#include <usb/gadget.h> -#include <of_gpio.h> - -#include <linux/list.h> -#include <linux/clk.h> -#include <linux/err.h> - -#include <asm/byteorder.h> - -#include <mach/hardware.h> -#include <mach/at91sam9261.h> -#include <mach/board.h> -#include <mach/cpu.h> -#include <mach/at91sam9261_matrix.h> - -#include "at91_udc.h" - - -/* - * This controller is simple and PIO-only. It's used in many AT91-series - * full speed USB controllers, including the at91rm9200 (arm920T, with MMU), - * at91sam926x (arm926ejs, with MMU), and several no-mmu versions. - * - * This driver expects the board has been wired with two GPIOs suppporting - * a VBUS sensing IRQ, and a D+ pullup. (They may be omitted, but the - * testing hasn't covered such cases.) - * - * The pullup is most important (so it's integrated on sam926x parts). It - * provides software control over whether the host enumerates the device. - * - * The VBUS sensing helps during enumeration, and allows both USB clocks - * (and the transceiver) to stay gated off until they're necessary, saving - * power. During USB suspend, the 48 MHz clock is gated off in hardware; - * it may also be gated off by software during some Linux sleep states. - */ - -#define DRIVER_VERSION "3 May 2006" - -#define driver_name "at91_udc" -static const char ep0name[] = "ep0"; - -#define at91_udp_read(udc, reg) \ - readl((udc)->udp_baseaddr + (reg)) -#define at91_udp_write(udc, reg, val) \ - writel((val), (udc)->udp_baseaddr + (reg)) - -/*-------------------------------------------------------------------------*/ - -static void done(struct at91_ep *ep, struct at91_request *req, int status) -{ - unsigned stopped = ep->stopped; - struct at91_udc *udc = ep->udc; - - list_del_init(&req->queue); - if (req->req.status == -EINPROGRESS) - req->req.status = status; - else - status = req->req.status; - if (status && status != -ESHUTDOWN) - VDBG(udc, "%s done %p, status %d\n", ep->ep.name, req, status); - - ep->stopped = 1; - req->req.complete(&ep->ep, &req->req); - ep->stopped = stopped; - - /* ep0 is always ready; other endpoints need a non-empty queue */ - if (list_empty(&ep->queue) && ep->int_mask != (1 << 0)) - at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask); -} - -/*-------------------------------------------------------------------------*/ - -/* bits indicating OUT fifo has data ready */ -#define RX_DATA_READY (AT91_UDP_RX_DATA_BK0 | AT91_UDP_RX_DATA_BK1) - -/* - * Endpoint FIFO CSR bits have a mix of bits, making it unsafe to just write - * back most of the value you just read (because of side effects, including - * bits that may change after reading and before writing). - * - * Except when changing a specific bit, always write values which: - * - clear SET_FX bits (setting them could change something) - * - set CLR_FX bits (clearing them could change something) - * - * There are also state bits like FORCESTALL, EPEDS, DIR, and EPTYPE - * that shouldn't normally be changed. - * - * NOTE at91sam9260 docs mention synch between UDPCK and MCK clock domains, - * implying a need to wait for one write to complete (test relevant bits) - * before starting the next write. This shouldn't be an issue given how - * infrequently we write, except maybe for write-then-read idioms. - */ -#define SET_FX (AT91_UDP_TXPKTRDY) -#define CLR_FX (RX_DATA_READY | AT91_UDP_RXSETUP \ - | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP) - -/* pull OUT packet data from the endpoint's fifo */ -static int read_fifo (struct at91_ep *ep, struct at91_request *req) -{ - u32 __iomem *creg = ep->creg; - u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); - u32 csr; - u8 *buf; - unsigned int count, bufferspace, is_done; - - buf = req->req.buf + req->req.actual; - bufferspace = req->req.length - req->req.actual; - - /* - * there might be nothing to read if ep_queue() calls us, - * or if we already emptied both pingpong buffers - */ -rescan: - csr = readl(creg); - if ((csr & RX_DATA_READY) == 0) - return 0; - - count = (csr & AT91_UDP_RXBYTECNT) >> 16; - if (count > ep->ep.maxpacket) - count = ep->ep.maxpacket; - if (count > bufferspace) { - DBG(ep->udc, "%s buffer overflow\n", ep->ep.name); - req->req.status = -EOVERFLOW; - count = bufferspace; - } - readsb(dreg, buf, count); - - /* release and swap pingpong mem bank */ - csr |= CLR_FX; - if (ep->is_pingpong) { - if (ep->fifo_bank == 0) { - csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); - ep->fifo_bank = 1; - } else { - csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK1); - ep->fifo_bank = 0; - } - } else - csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); - writel(csr, creg); - - req->req.actual += count; - is_done = (count < ep->ep.maxpacket); - if (count == bufferspace) - is_done = 1; - - PACKET("%s %p out/%d%s\n", ep->ep.name, &req->req, count, - is_done ? " (done)" : ""); - - /* - * avoid extra trips through IRQ logic for packets already in - * the fifo ... maybe preventing an extra (expensive) OUT-NAK - */ - if (is_done) - done(ep, req, 0); - else if (ep->is_pingpong) { - /* - * One dummy read to delay the code because of a HW glitch: - * CSR returns bad RXCOUNT when read too soon after updating - * RX_DATA_BK flags. - */ - csr = readl(creg); - - bufferspace -= count; - buf += count; - goto rescan; - } - - return is_done; -} - -/* load fifo for an IN packet */ -static int write_fifo(struct at91_ep *ep, struct at91_request *req) -{ - u32 __iomem *creg = ep->creg; - u32 csr = readl(creg); - u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); - unsigned total, count, is_last; - u8 *buf; - - /* - * TODO: allow for writing two packets to the fifo ... that'll - * reduce the amount of IN-NAKing, but probably won't affect - * throughput much. (Unlike preventing OUT-NAKing!) - */ - - /* - * If ep_queue() calls us, the queue is empty and possibly in - * odd states like TXCOMP not yet cleared (we do it, saving at - * least one IRQ) or the fifo not yet being free. Those aren't - * issues normally (IRQ handler fast path). - */ - if (unlikely(csr & (AT91_UDP_TXCOMP | AT91_UDP_TXPKTRDY))) { - if (csr & AT91_UDP_TXCOMP) { - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_TXCOMP); - writel(csr, creg); - csr = readl(creg); - } - if (csr & AT91_UDP_TXPKTRDY) - return 0; - } - - buf = req->req.buf + req->req.actual; - total = req->req.length - req->req.actual; - if (ep->ep.maxpacket < total) { - count = ep->ep.maxpacket; - is_last = 0; - } else { - count = total; - is_last = (count < ep->ep.maxpacket) || !req->req.zero; - } - - /* - * Write the packet, maybe it's a ZLP. - * - * NOTE: incrementing req->actual before we receive the ACK means - * gadget driver IN bytecounts can be wrong in fault cases. That's - * fixable with PIO drivers like this one (save "count" here, and - * do the increment later on TX irq), but not for most DMA hardware. - * - * So all gadget drivers must accept that potential error. Some - * hardware supports precise fifo status reporting, letting them - * recover when the actual bytecount matters (e.g. for USB Test - * and Measurement Class devices). - */ - writesb(dreg, buf, count); - csr &= ~SET_FX; - csr |= CLR_FX | AT91_UDP_TXPKTRDY; - writel(csr, creg); - req->req.actual += count; - - PACKET("%s %p in/%d%s\n", ep->ep.name, &req->req, count, - is_last ? " (done)" : ""); - if (is_last) - done(ep, req, 0); - return is_last; -} - -static void nuke(struct at91_ep *ep, int status) -{ - struct at91_request *req; - - /* terminate any request in the queue */ - ep->stopped = 1; - if (list_empty(&ep->queue)) - return; - - VDBG(udc, "%s %s\n", __func__, ep->ep.name); - while (!list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, struct at91_request, queue); - done(ep, req, status); - } -} - -/*-------------------------------------------------------------------------*/ - -static int at91_ep_enable(struct usb_ep *_ep, - const struct usb_endpoint_descriptor *desc) -{ - struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); - struct at91_udc *udc = ep->udc; - u16 maxpacket; - u32 tmp; - - if (!desc || ep->desc - || _ep->name == ep0name - || desc->bDescriptorType != USB_DT_ENDPOINT - || (maxpacket = le16_to_cpu(desc->wMaxPacketSize)) == 0 - || maxpacket > ep->maxpacket) { - DBG(udc, "bad ep or descriptor\n"); - return -EINVAL; - } - - if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { - DBG(udc, "bogus device state\n"); - return -ESHUTDOWN; - } - - tmp = usb_endpoint_type(desc); - switch (tmp) { - case USB_ENDPOINT_XFER_CONTROL: - DBG(udc, "only one control endpoint\n"); - return -EINVAL; - case USB_ENDPOINT_XFER_INT: - if (maxpacket > 64) - goto bogus_max; - break; - case USB_ENDPOINT_XFER_BULK: - switch (maxpacket) { - case 8: - case 16: - case 32: - case 64: - goto ok; - } -bogus_max: - DBG(udc, "bogus maxpacket %d\n", maxpacket); - return -EINVAL; - case USB_ENDPOINT_XFER_ISOC: - if (!ep->is_pingpong) { - DBG(udc, "iso requires double buffering\n"); - return -EINVAL; - } - break; - } - -ok: - - /* initialize endpoint to match this descriptor */ - ep->is_in = usb_endpoint_dir_in(desc); - ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); - ep->stopped = 0; - if (ep->is_in) - tmp |= 0x04; - tmp <<= 8; - tmp |= AT91_UDP_EPEDS; - writel(tmp, ep->creg); - - ep->desc = desc; - ep->ep.maxpacket = maxpacket; - - /* - * reset/init endpoint fifo. NOTE: leaves fifo_bank alone, - * since endpoint resets don't reset hw pingpong state. - */ - at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); - at91_udp_write(udc, AT91_UDP_RST_EP, 0); - - return 0; -} - -static int at91_ep_disable (struct usb_ep * _ep) -{ - struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); - struct at91_udc *udc = ep->udc; - - if (ep == &ep->udc->ep[0]) - return -EINVAL; - - nuke(ep, -ESHUTDOWN); - - /* restore the endpoint's pristine config */ - ep->desc = NULL; - ep->ep.maxpacket = ep->maxpacket; - - /* reset fifos and endpoint */ - if (ep->udc->clocked) { - at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); - at91_udp_write(udc, AT91_UDP_RST_EP, 0); - writel(0, ep->creg); - } - - return 0; -} - -/* - * this is a PIO-only driver, so there's nothing - * interesting for request or buffer allocation. - */ - -static struct usb_request * -at91_ep_alloc_request(struct usb_ep *_ep) -{ - struct at91_request *req; - - req = xzalloc(sizeof *req); - - INIT_LIST_HEAD(&req->queue); - return &req->req; -} - -static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) -{ - struct at91_request *req; - - req = container_of(_req, struct at91_request, req); - BUG_ON(!list_empty(&req->queue)); - kfree(req); -} - -static int at91_ep_queue(struct usb_ep *_ep, - struct usb_request *_req) -{ - struct at91_request *req; - struct at91_ep *ep; - struct at91_udc *udc; - int status; - - req = container_of(_req, struct at91_request, req); - ep = container_of(_ep, struct at91_ep, ep); - - udc = ep->udc; - - if (!_req || !_req->complete - || !_req->buf || !list_empty(&req->queue)) { - DBG(udc, "invalid request\n"); - return -EINVAL; - } - - if (!_ep || (!ep->desc && ep->ep.name != ep0name)) { - DBG(udc, "invalid ep\n"); - return -EINVAL; - } - - if (!udc || !udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { - DBG(udc, "invalid device\n"); - return -EINVAL; - } - - _req->status = -EINPROGRESS; - _req->actual = 0; - - /* try to kickstart any empty and idle queue */ - if (list_empty(&ep->queue) && !ep->stopped) { - int is_ep0; - - /* - * If this control request has a non-empty DATA stage, this - * will start that stage. It works just like a non-control - * request (until the status stage starts, maybe early). - * - * If the data stage is empty, then this starts a successful - * IN/STATUS stage. (Unsuccessful ones use set_halt.) - */ - is_ep0 = (ep->ep.name == ep0name); - if (is_ep0) { - u32 tmp; - - if (!udc->req_pending) { - status = -EINVAL; - goto done; - } - - /* - * defer changing CONFG until after the gadget driver - * reconfigures the endpoints. - */ - if (udc->wait_for_config_ack) { - tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); - tmp ^= AT91_UDP_CONFG; - VDBG(udc, "toggle config\n"); - at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); - } - if (req->req.length == 0) { -ep0_in_status: - PACKET("ep0 in/status\n"); - status = 0; - tmp = readl(ep->creg); - tmp &= ~SET_FX; - tmp |= CLR_FX | AT91_UDP_TXPKTRDY; - writel(tmp, ep->creg); - udc->req_pending = 0; - goto done; - } - } - - if (ep->is_in) - status = write_fifo(ep, req); - else { - status = read_fifo(ep, req); - - /* IN/STATUS stage is otherwise triggered by irq */ - if (status && is_ep0) - goto ep0_in_status; - } - } else - status = 0; - - if (req && !status) { - list_add_tail (&req->queue, &ep->queue); - } -done: - return (status < 0) ? status : 0; -} - -static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) -{ - struct at91_ep *ep; - struct at91_request *req; - - ep = container_of(_ep, struct at91_ep, ep); - if (!_ep || ep->ep.name == ep0name) - return -EINVAL; - - /* make sure it's actually queued on this endpoint */ - list_for_each_entry (req, &ep->queue, queue) { - if (&req->req == _req) - break; - } - if (&req->req != _req) { - return -EINVAL; - } - - done(ep, req, -ECONNRESET); - return 0; -} - -static int at91_ep_set_halt(struct usb_ep *_ep, int value) -{ - struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); - struct at91_udc *udc = ep->udc; - u32 __iomem *creg; - u32 csr; - int status = 0; - - if (!_ep || ep->is_iso || !ep->udc->clocked) - return -EINVAL; - - creg = ep->creg; - - csr = readl(creg); - - /* - * fail with still-busy IN endpoints, ensuring correct sequencing - * of data tx then stall. note that the fifo rx bytecount isn't - * completely accurate as a tx bytecount. - */ - if (ep->is_in && (!list_empty(&ep->queue) || (csr >> 16) != 0)) - status = -EAGAIN; - else { - csr |= CLR_FX; - csr &= ~SET_FX; - if (value) { - csr |= AT91_UDP_FORCESTALL; - VDBG(udc, "halt %s\n", ep->ep.name); - } else { - at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); - at91_udp_write(udc, AT91_UDP_RST_EP, 0); - csr &= ~AT91_UDP_FORCESTALL; - } - writel(csr, creg); - } - - return status; -} - -static const struct usb_ep_ops at91_ep_ops = { - .enable = at91_ep_enable, - .disable = at91_ep_disable, - .alloc_request = at91_ep_alloc_request, - .free_request = at91_ep_free_request, - .queue = at91_ep_queue, - .dequeue = at91_ep_dequeue, - .set_halt = at91_ep_set_halt, - /* there's only imprecise fifo status reporting */ -}; - -/*-------------------------------------------------------------------------*/ - -static int at91_get_frame(struct usb_gadget *gadget) -{ - struct at91_udc *udc = to_udc(gadget); - - if (!to_udc(gadget)->clocked) - return -EINVAL; - return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM; -} - -static int at91_wakeup(struct usb_gadget *gadget) -{ - struct at91_udc *udc = to_udc(gadget); - u32 glbstate; - int status = -EINVAL; - - DBG(udc, "%s\n", __func__ ); - - if (!udc->clocked || !udc->suspended) - goto done; - - /* NOTE: some "early versions" handle ESR differently ... */ - - glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT); - if (!(glbstate & AT91_UDP_ESR)) - goto done; - glbstate |= AT91_UDP_ESR; - at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate); - -done: - return status; -} - -/* reinit == restore initial software state */ -static void udc_reinit(struct at91_udc *udc) -{ - u32 i; - - INIT_LIST_HEAD(&udc->gadget.ep_list); - INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); - - for (i = 0; i < NUM_ENDPOINTS; i++) { - struct at91_ep *ep = &udc->ep[i]; - - if (i != 0) - list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); - ep->desc = NULL; - ep->stopped = 0; - ep->fifo_bank = 0; - usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket); - ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i); - /* initialize one queue per endpoint */ - INIT_LIST_HEAD(&ep->queue); - } -} - -static void stop_activity(struct at91_udc *udc) -{ - struct usb_gadget_driver *driver = udc->driver; - int i; - - if (udc->gadget.speed == USB_SPEED_UNKNOWN) - driver = NULL; - udc->gadget.speed = USB_SPEED_UNKNOWN; - udc->suspended = 0; - - for (i = 0; i < NUM_ENDPOINTS; i++) { - struct at91_ep *ep = &udc->ep[i]; - ep->stopped = 1; - nuke(ep, -ESHUTDOWN); - } - if (driver) { - driver->disconnect(&udc->gadget); - } - - udc_reinit(udc); -} - -static void clk_on(struct at91_udc *udc) -{ - if (udc->clocked) - return; - udc->clocked = 1; - clk_enable(udc->iclk); - clk_enable(udc->fclk); -} - -static void clk_off(struct at91_udc *udc) -{ - if (!udc->clocked) - return; - udc->clocked = 0; - udc->gadget.speed = USB_SPEED_UNKNOWN; - clk_disable(udc->fclk); - clk_disable(udc->iclk); -} - -/* - * activate/deactivate link with host; minimize power usage for - * inactive links by cutting clocks and transceiver power. - */ -static void pullup(struct at91_udc *udc, int is_on) -{ - int active = !udc->board.pullup_active_low; - - if (!udc->enabled || !udc->vbus) - is_on = 0; - DBG(udc, "%sactive\n", is_on ? "" : "in"); - - if (is_on) { - clk_on(udc); - at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); - at91_udp_write(udc, AT91_UDP_TXVC, 0); - if (cpu_is_at91rm9200()) - gpio_set_value(udc->board.pullup_pin, active); - else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { - u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); - - txvc |= AT91_UDP_TXVC_PUON; - at91_udp_write(udc, AT91_UDP_TXVC, txvc); - } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { - u32 usbpucr; - usbpucr = readl(AT91SAM9261_BASE_MATRIX + AT91SAM9261_MATRIX_USBPUCR); - usbpucr |= AT91SAM9261_MATRIX_USBPUCR_PUON; - writel(usbpucr, AT91SAM9261_BASE_MATRIX + AT91SAM9261_MATRIX_USBPUCR); - } - } else { - stop_activity(udc); - at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); - at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); - if (cpu_is_at91rm9200()) - gpio_set_value(udc->board.pullup_pin, !active); - else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) { - u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); - - txvc &= ~AT91_UDP_TXVC_PUON; - at91_udp_write(udc, AT91_UDP_TXVC, txvc); - } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { - u32 usbpucr; - usbpucr = readl(AT91SAM9261_BASE_MATRIX + AT91SAM9261_MATRIX_USBPUCR); - usbpucr &= ~AT91SAM9261_MATRIX_USBPUCR_PUON; - writel(usbpucr, AT91SAM9261_BASE_MATRIX + AT91SAM9261_MATRIX_USBPUCR); - } - clk_off(udc); - } -} - -/* vbus is here! turn everything on that's ready */ -static int at91_vbus_session(struct usb_gadget *gadget, int is_active) -{ - struct at91_udc *udc = to_udc(gadget); - - /* VDBG(udc, "vbus %s\n", is_active ? "on" : "off"); */ - udc->vbus = (is_active != 0); - if (udc->driver) - pullup(udc, is_active); - else - pullup(udc, 0); - return 0; -} - -static int at91_pullup(struct usb_gadget *gadget, int is_on) -{ - struct at91_udc *udc = to_udc(gadget); - - udc->enabled = is_on = !!is_on; - pullup(udc, is_on); - return 0; -} - -static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on) -{ - struct at91_udc *udc = to_udc(gadget); - - udc->selfpowered = (is_on != 0); - return 0; -} - -/*-------------------------------------------------------------------------*/ - -static int handle_ep(struct at91_ep *ep) -{ - struct at91_request *req; - u32 __iomem *creg = ep->creg; - u32 csr = readl(creg); - - if (!list_empty(&ep->queue)) - req = list_entry(ep->queue.next, - struct at91_request, queue); - else - req = NULL; - - if (ep->is_in) { - if (csr & (AT91_UDP_STALLSENT | AT91_UDP_TXCOMP)) { - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP); - writel(csr, creg); - } - if (req) - return write_fifo(ep, req); - - } else { - if (csr & AT91_UDP_STALLSENT) { - /* STALLSENT bit == ISOERR */ - if (ep->is_iso && req) - req->req.status = -EILSEQ; - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_STALLSENT); - writel(csr, creg); - csr = readl(creg); - } - if (req && (csr & RX_DATA_READY)) - return read_fifo(ep, req); - } - return 0; -} - -union setup { - u8 raw[8]; - struct usb_ctrlrequest r; -}; - -static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) -{ - u32 __iomem *creg = ep->creg; - u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); - unsigned rxcount, i = 0; - u32 tmp; - union setup pkt; - int status = 0; - - /* read and ack SETUP; hard-fail for bogus packets */ - rxcount = (csr & AT91_UDP_RXBYTECNT) >> 16; - if (likely(rxcount == 8)) { - while (rxcount--) - pkt.raw[i++] = readb(dreg); - if (pkt.r.bRequestType & USB_DIR_IN) { - csr |= AT91_UDP_DIR; - ep->is_in = 1; - } else { - csr &= ~AT91_UDP_DIR; - ep->is_in = 0; - } - } else { - /* REVISIT this happens sometimes under load; why?? */ - ERR(udc, "SETUP len %d, csr %08x\n", rxcount, csr); - status = -EINVAL; - } - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_RXSETUP); - writel(csr, creg); - udc->wait_for_addr_ack = 0; - udc->wait_for_config_ack = 0; - ep->stopped = 0; - if (unlikely(status != 0)) - goto stall; - -#define w_index le16_to_cpu(pkt.r.wIndex) -#define w_value le16_to_cpu(pkt.r.wValue) -#define w_length le16_to_cpu(pkt.r.wLength) - - VDBG(udc, "SETUP %02x.%02x v%04x i%04x l%04x\n", - pkt.r.bRequestType, pkt.r.bRequest, - w_value, w_index, w_length); - - /* - * A few standard requests get handled here, ones that touch - * hardware ... notably for device and endpoint features. - */ - udc->req_pending = 1; - csr = readl(creg); - csr |= CLR_FX; - csr &= ~SET_FX; - switch ((pkt.r.bRequestType << 8) | pkt.r.bRequest) { - - case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) - | USB_REQ_SET_ADDRESS: - writel(csr | AT91_UDP_TXPKTRDY, creg); - udc->addr = w_value; - udc->wait_for_addr_ack = 1; - udc->req_pending = 0; - /* FADDR is set later, when we ack host STATUS */ - return; - - case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) - | USB_REQ_SET_CONFIGURATION: - tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG; - if (pkt.r.wValue) - udc->wait_for_config_ack = (tmp == 0); - else - udc->wait_for_config_ack = (tmp != 0); - if (udc->wait_for_config_ack) - VDBG(udc, "wait for config\n"); - /* CONFG is toggled later, if gadget driver succeeds */ - break; - - /* - * Hosts may set or clear remote wakeup status, and - * devices may report they're VBUS powered. - */ - case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) - | USB_REQ_GET_STATUS: - tmp = (udc->selfpowered << USB_DEVICE_SELF_POWERED); - if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR) - tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP); - PACKET("get device status\n"); - writeb(tmp, dreg); - writeb(0, dreg); - goto write_in; - /* then STATUS starts later, automatically */ - case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) - | USB_REQ_SET_FEATURE: - if (w_value != USB_DEVICE_REMOTE_WAKEUP) - goto stall; - tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); - tmp |= AT91_UDP_ESR; - at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); - goto succeed; - case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) - | USB_REQ_CLEAR_FEATURE: - if (w_value != USB_DEVICE_REMOTE_WAKEUP) - goto stall; - tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); - tmp &= ~AT91_UDP_ESR; - at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); - goto succeed; - - /* - * Interfaces have no feature settings; this is pretty useless. - * we won't even insist the interface exists... - */ - case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) - | USB_REQ_GET_STATUS: - PACKET("get interface status\n"); - writeb(0, dreg); - writeb(0, dreg); - goto write_in; - /* then STATUS starts later, automatically */ - case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) - | USB_REQ_SET_FEATURE: - case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) - | USB_REQ_CLEAR_FEATURE: - goto stall; - - /* - * Hosts may clear bulk/intr endpoint halt after the gadget - * driver sets it (not widely used); or set it (for testing) - */ - case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) - | USB_REQ_GET_STATUS: - tmp = w_index & USB_ENDPOINT_NUMBER_MASK; - ep = &udc->ep[tmp]; - if (tmp >= NUM_ENDPOINTS || (tmp && !ep->desc)) - goto stall; - - if (tmp) { - if ((w_index & USB_DIR_IN)) { - if (!ep->is_in) - goto stall; - } else if (ep->is_in) - goto stall; - } - PACKET("get %s status\n", ep->ep.name); - if (readl(ep->creg) & AT91_UDP_FORCESTALL) - tmp = (1 << USB_ENDPOINT_HALT); - else - tmp = 0; - writeb(tmp, dreg); - writeb(0, dreg); - goto write_in; - /* then STATUS starts later, automatically */ - case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) - | USB_REQ_SET_FEATURE: - tmp = w_index & USB_ENDPOINT_NUMBER_MASK; - ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) - goto stall; - if (!ep->desc || ep->is_iso) - goto stall; - if ((w_index & USB_DIR_IN)) { - if (!ep->is_in) - goto stall; - } else if (ep->is_in) - goto stall; - - tmp = readl(ep->creg); - tmp &= ~SET_FX; - tmp |= CLR_FX | AT91_UDP_FORCESTALL; - writel(tmp, ep->creg); - goto succeed; - case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) - | USB_REQ_CLEAR_FEATURE: - tmp = w_index & USB_ENDPOINT_NUMBER_MASK; - ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) - goto stall; - if (tmp == 0) - goto succeed; - if (!ep->desc || ep->is_iso) - goto stall; - if ((w_index & USB_DIR_IN)) { - if (!ep->is_in) - goto stall; - } else if (ep->is_in) - goto stall; - - at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); - at91_udp_write(udc, AT91_UDP_RST_EP, 0); - tmp = readl(ep->creg); - tmp |= CLR_FX; - tmp &= ~(SET_FX | AT91_UDP_FORCESTALL); - writel(tmp, ep->creg); - if (!list_empty(&ep->queue)) - handle_ep(ep); - goto succeed; - } - -#undef w_value -#undef w_index -#undef w_length - - /* pass request up to the gadget driver */ - if (udc->driver) { - status = udc->driver->setup(&udc->gadget, &pkt.r); - } - else - status = -ENODEV; - if (status < 0) { -stall: - VDBG(udc, "req %02x.%02x protocol STALL; stat %d\n", - pkt.r.bRequestType, pkt.r.bRequest, status); - csr |= AT91_UDP_FORCESTALL; - writel(csr, creg); - udc->req_pending = 0; - } - return; - -succeed: - /* immediate successful (IN) STATUS after zero length DATA */ - PACKET("ep0 in/status\n"); -write_in: - csr |= AT91_UDP_TXPKTRDY; - writel(csr, creg); - udc->req_pending = 0; -} - -static void handle_ep0(struct at91_udc *udc) -{ - struct at91_ep *ep0 = &udc->ep[0]; - u32 __iomem *creg = ep0->creg; - u32 csr = readl(creg); - struct at91_request *req; - - if (unlikely(csr & AT91_UDP_STALLSENT)) { - nuke(ep0, -EPROTO); - udc->req_pending = 0; - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL); - writel(csr, creg); - VDBG(udc, "ep0 stalled\n"); - csr = readl(creg); - } - if (csr & AT91_UDP_RXSETUP) { - nuke(ep0, 0); - udc->req_pending = 0; - handle_setup(udc, ep0, csr); - return; - } - - if (list_empty(&ep0->queue)) - req = NULL; - else - req = list_entry(ep0->queue.next, struct at91_request, queue); - - /* host ACKed an IN packet that we sent */ - if (csr & AT91_UDP_TXCOMP) { - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_TXCOMP); - - /* write more IN DATA? */ - if (req && ep0->is_in) { - if (handle_ep(ep0)) - udc->req_pending = 0; - - /* - * Ack after: - * - last IN DATA packet (including GET_STATUS) - * - IN/STATUS for OUT DATA - * - IN/STATUS for any zero-length DATA stage - * except for the IN DATA case, the host should send - * an OUT status later, which we'll ack. - */ - } else { - udc->req_pending = 0; - writel(csr, creg); - - /* - * SET_ADDRESS takes effect only after the STATUS - * (to the original address) gets acked. - */ - if (udc->wait_for_addr_ack) { - u32 tmp; - - at91_udp_write(udc, AT91_UDP_FADDR, - AT91_UDP_FEN | udc->addr); - tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); - tmp &= ~AT91_UDP_FADDEN; - if (udc->addr) - tmp |= AT91_UDP_FADDEN; - at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); - - udc->wait_for_addr_ack = 0; - VDBG(udc, "address %d\n", udc->addr); - } - } - } - - /* OUT packet arrived ... */ - else if (csr & AT91_UDP_RX_DATA_BK0) { - csr |= CLR_FX; - csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); - - /* OUT DATA stage */ - if (!ep0->is_in) { - if (req) { - if (handle_ep(ep0)) { - /* send IN/STATUS */ - PACKET("ep0 in/status\n"); - csr = readl(creg); - csr &= ~SET_FX; - csr |= CLR_FX | AT91_UDP_TXPKTRDY; - writel(csr, creg); - udc->req_pending = 0; - } - } else if (udc->req_pending) { - /* - * AT91 hardware has a hard time with this - * "deferred response" mode for control-OUT - * transfers. (For control-IN it's fine.) - * - * The normal solution leaves OUT data in the - * fifo until the gadget driver is ready. - * We couldn't do that here without disabling - * the IRQ that tells about SETUP packets, - * e.g. when the host gets impatient... - * - * Working around it by copying into a buffer - * would almost be a non-deferred response, - * except that it wouldn't permit reliable - * stalling of the request. Instead, demand - * that gadget drivers not use this mode. - */ - DBG(udc, "no control-OUT deferred responses!\n"); - writel(csr | AT91_UDP_FORCESTALL, creg); - udc->req_pending = 0; - } - - /* STATUS stage for control-IN; ack. */ - } else { - PACKET("ep0 out/status ACK\n"); - writel(csr, creg); - - /* "early" status stage */ - if (req) - done(ep0, req, 0); - } - } -} - -static void at91_udc_irq (void *_udc) -{ - struct at91_udc *udc = _udc; - u32 rescans = 5; - - while (rescans--) { - u32 status; - - status = at91_udp_read(udc, AT91_UDP_ISR); - if (!status) - break; - - /* USB reset irq: not maskable */ - if (status & AT91_UDP_ENDBUSRES) { - at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS); - /* Atmel code clears this irq twice */ - at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); - at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); - VDBG(udc, "end bus reset\n"); - udc->addr = 0; - stop_activity(udc); - - /* enable ep0 */ - at91_udp_write(udc, AT91_UDP_CSR(0), - AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL); - udc->gadget.speed = USB_SPEED_FULL; - udc->suspended = 0; - - /* - * NOTE: this driver keeps clocks off unless the - * USB host is present. That saves power, but for - * boards that don't support VBUS detection, both - * clocks need to be active most of the time. - */ - - /* host initiated suspend (3+ms bus idle) */ - } else if (status & AT91_UDP_RXSUSP) { - at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP); - at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP); - /* VDBG(udc, "bus suspend\n"); */ - if (udc->suspended) - continue; - udc->suspended = 1; - - /* - * NOTE: when suspending a VBUS-powered device, the - * gadget driver should switch into slow clock mode - * and then into standby to avoid drawing more than - * 500uA power (2500uA for some high-power configs). - */ - if (udc->driver && udc->driver->suspend) { - udc->driver->suspend(&udc->gadget); - } - - /* host initiated resume */ - } else if (status & AT91_UDP_RXRSM) { - at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); - at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); - /* VDBG(udc, "bus resume\n"); */ - if (!udc->suspended) - continue; - udc->suspended = 0; - - /* - * NOTE: for a VBUS-powered device, the gadget driver - * would normally want to switch out of slow clock - * mode into normal mode. - */ - if (udc->driver && udc->driver->resume) { - udc->driver->resume(&udc->gadget); - } - - /* endpoint IRQs are cleared by handling them */ - } else { - int i; - unsigned mask = 1; - struct at91_ep *ep = &udc->ep[1]; - - if (status & mask) - handle_ep0(udc); - for (i = 1; i < NUM_ENDPOINTS; i++) { - mask <<= 1; - if (status & mask) - handle_ep(ep); - ep++; - } - } - } -} - -static int at91_udc_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver) -{ - struct at91_udc *udc = container_of(gadget, struct at91_udc, gadget); - - if (!udc->iclk) - return -ENODEV; - - udc->driver = driver; - udc->enabled = 1; - udc->selfpowered = 1; - - DBG(udc, "bound to %s\n", driver->function); - return 0; -} - -static int at91_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver *driver) -{ - struct at91_udc *udc = container_of(gadget, struct at91_udc, gadget); - - udc->enabled = 0; - at91_udp_write(udc, AT91_UDP_IDR, ~0); - udc->driver = NULL; - - DBG(udc, "unbound from %s\n", driver->function); - return 0; -} - -static void at91_udc_gadget_poll(struct usb_gadget *gadget); - -static const struct usb_gadget_ops at91_udc_ops = { - .get_frame = at91_get_frame, - .wakeup = at91_wakeup, - .set_selfpowered = at91_set_selfpowered, - .vbus_session = at91_vbus_session, - .pullup = at91_pullup, - - /* - * VBUS-powered devices may also also want to support bigger - * power budgets after an appropriate SET_CONFIGURATION. - */ - /* .vbus_power = at91_vbus_power, */ - .udc_start = at91_udc_start, - .udc_stop = at91_udc_stop, - .udc_poll = at91_udc_gadget_poll, -}; - -/*-------------------------------------------------------------------------*/ - -static struct at91_udc controller = { - .gadget = { - .ops = &at91_udc_ops, - .ep0 = &controller.ep[0].ep, - .name = driver_name, - }, - .ep[0] = { - .ep = { - .name = ep0name, - .ops = &at91_ep_ops, - }, - .udc = &controller, - .maxpacket = 8, - .int_mask = 1 << 0, - }, - .ep[1] = { - .ep = { - .name = "ep1", - .ops = &at91_ep_ops, - }, - .udc = &controller, - .is_pingpong = 1, - .maxpacket = 64, - .int_mask = 1 << 1, - }, - .ep[2] = { - .ep = { - .name = "ep2", - .ops = &at91_ep_ops, - }, - .udc = &controller, - .is_pingpong = 1, - .maxpacket = 64, - .int_mask = 1 << 2, - }, - .ep[3] = { - .ep = { - /* could actually do bulk too */ - .name = "ep3-int", - .ops = &at91_ep_ops, - }, - .udc = &controller, - .maxpacket = 8, - .int_mask = 1 << 3, - }, - .ep[4] = { - .ep = { - .name = "ep4", - .ops = &at91_ep_ops, - }, - .udc = &controller, - .is_pingpong = 1, - .maxpacket = 256, - .int_mask = 1 << 4, - }, - .ep[5] = { - .ep = { - .name = "ep5", - .ops = &at91_ep_ops, - }, - .udc = &controller, - .is_pingpong = 1, - .maxpacket = 256, - .int_mask = 1 << 5, - }, - /* ep6 and ep7 are also reserved (custom silicon might use them) */ -}; - -static void at91_udc_irq (void *_udc); - -static int at91_udc_vbus_set(struct param_d *p, void *priv) -{ - return -EROFS; -} - -static void at91_udc_gadget_poll(struct usb_gadget *gadget) -{ - struct at91_udc *udc = &controller; - u32 value; - - if (!udc->udp_baseaddr) - return; - - if (gpio_is_valid(udc->board.vbus_pin)) { - value = gpio_get_value(udc->board.vbus_pin); - value ^= udc->board.vbus_active_low; - - udc->gpio_vbus_val = value; - - if (!value) - return; - } - - value = at91_udp_read(udc, AT91_UDP_ISR) & (~(AT91_UDP_SOFINT)); - if (value) - at91_udc_irq(udc); -} - -static void __init at91udc_of_init(struct at91_udc *udc, struct device_node *np) -{ - enum of_gpio_flags flags; - struct at91_udc_data *board; - - board = &udc->board; - - board->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0, - &flags); - board->vbus_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; - - board->pullup_pin = of_get_named_gpio_flags(np, "atmel,pullup-gpio", 0, - &flags); - board->pullup_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; -} - -/*-------------------------------------------------------------------------*/ - -static int __init at91udc_probe(struct device_d *dev) -{ - struct resource *iores; - struct at91_udc *udc = &controller; - int retval; - const char *iclk_name; - const char *fclk_name; - - /* init software state */ - udc->dev = dev; - udc->enabled = 0; - - if (dev->platform_data) { - /* small (so we copy it) */ - udc->board = *(struct at91_udc_data *)dev->platform_data; - iclk_name = "udc_clk"; - fclk_name = "udpck"; - } else { - if (!IS_ENABLED(CONFIG_OFDEVICE) || !dev->device_node) { - dev_err(dev, "no DT and no platform_data\n"); - return -ENODEV; - } - - at91udc_of_init(udc, dev->device_node); - iclk_name = "pclk"; - fclk_name = "hclk"; - } - - /* rm9200 needs manual D+ pullup; off by default */ - if (cpu_is_at91rm9200()) { - if (udc->board.pullup_pin <= 0) { - DBG(udc, "no D+ pullup?\n"); - retval = -ENODEV; - goto fail0; - } - retval = gpio_request(udc->board.pullup_pin, "udc_pullup"); - if (retval) { - DBG(udc, "D+ pullup is busy\n"); - goto fail0; - } - gpio_direction_output(udc->board.pullup_pin, - udc->board.pullup_active_low); - } - - /* newer chips have more FIFO memory than rm9200 */ - if (cpu_is_at91sam9260() || cpu_is_at91sam9g20()) { - udc->ep[0].maxpacket = 64; - udc->ep[3].maxpacket = 64; - udc->ep[4].maxpacket = 512; - udc->ep[5].maxpacket = 512; - } else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) { - udc->ep[3].maxpacket = 64; - } else if (cpu_is_at91sam9263()) { - udc->ep[0].maxpacket = 64; - udc->ep[3].maxpacket = 64; - } - - iores = dev_request_mem_resource(dev, 0); - if (IS_ERR(iores)) - return PTR_ERR(iores); - udc->udp_baseaddr = IOMEM(iores->start); - if (IS_ERR(udc->udp_baseaddr)) { - retval = PTR_ERR(udc->udp_baseaddr); - goto fail0a; - } - - udc_reinit(udc); - - /* get interface and function clocks */ - udc->iclk = clk_get(dev, iclk_name); - udc->fclk = clk_get(dev, fclk_name); - if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) { - DBG(udc, "clocks missing\n"); - retval = -ENODEV; - /* NOTE: we "know" here that refcounts on these are NOPs */ - goto fail0a; - } - - /* don't do anything until we have both gadget driver and VBUS */ - clk_enable(udc->iclk); - at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); - at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff); - /* Clear all pending interrupts - UDP may be used by bootloader. */ - at91_udp_write(udc, AT91_UDP_ICR, 0xffffffff); - clk_disable(udc->iclk); - - if (gpio_is_valid(udc->board.vbus_pin)) { - retval = gpio_request(udc->board.vbus_pin, "udc_vbus"); - if (retval < 0) { - dev_err(dev, "request vbus pin failed\n"); - goto fail0a; - } - gpio_direction_input(udc->board.vbus_pin); - - /* - * Get the initial state of VBUS - we cannot expect - * a pending interrupt. - */ - udc->vbus = gpio_get_value(udc->board.vbus_pin); - DBG(udc, "VBUS detection: host:%s \n", - udc->vbus ? "present":"absent"); - - udc->gpio_vbus_val = udc->vbus; - - dev_add_param_bool(dev, "vbus", - at91_udc_vbus_set, NULL, &udc->gpio_vbus_val, udc); - } else { - DBG(udc, "no VBUS detection, assuming always-on\n"); - udc->vbus = 1; - } - - retval = usb_add_gadget_udc_release(dev, &udc->gadget, NULL); - if (retval) - goto fail0a; - - INFO(udc, "%s version %s\n", driver_name, DRIVER_VERSION); - return 0; - -fail0a: - if (cpu_is_at91rm9200()) - gpio_free(udc->board.pullup_pin); -fail0: - DBG(udc, "%s probe failed, %d\n", driver_name, retval); - return retval; -} -static const struct of_device_id at91_udc_dt_ids[] = { - { .compatible = "atmel,at91rm9200-udc" }, - { .compatible = "atmel,at91sam9260-udc" }, - { .compatible = "atmel,at91sam9261-udc" }, - { .compatible = "atmel,at91sam9263-udc" }, - { /* sentinel */ } -}; - -static struct driver_d at91_udc_driver = { - .name = driver_name, - .probe = at91udc_probe, - .of_compatible = DRV_OF_COMPAT(at91_udc_dt_ids), -}; -device_platform_driver(at91_udc_driver); |