[ARM] 5120/1: pxa: correct platform driver names for PXA25x and PXA27x UDC drivers
The pxa2xx_udc.c driver is renamed to pxa25x_udc.c (the platform
driver name changes from pxa2xx-udc to pxa25x-udc) and the
platform driver name of pxa27x_udc.c is fixed to pxa27x-udc.
pxa_device_udc in devices.c is split into pxa25x and pxa27x flavors
and the pxa27x_device_udc is enabled in pxa27x.c.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Including from Ian Molton:
Fixes for mistakes left over from the PXA2{5,7}X UDC split.
Signed-off-by: Ian Molton <spyro@f2s.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
new file mode 100644
index 0000000..031dceb
--- /dev/null
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -0,0 +1,2388 @@
+/*
+ * Intel PXA25x and IXP4xx on-chip full speed USB device controllers
+ *
+ * Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker)
+ * Copyright (C) 2003 Robert Schwebel, Pengutronix
+ * Copyright (C) 2003 Benedikt Spranger, Pengutronix
+ * Copyright (C) 2003 David Brownell
+ * Copyright (C) 2003 Joshua Wise
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/io.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/gpio.h>
+#include <asm/system.h>
+#include <asm/mach-types.h>
+#include <asm/unaligned.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+/*
+ * This driver is PXA25x only. Grab the right register definitions.
+ */
+#ifdef CONFIG_ARCH_PXA
+#include <asm/arch/pxa25x-udc.h>
+#endif
+
+#include <asm/mach/udc_pxa2xx.h>
+
+
+/*
+ * This driver handles the USB Device Controller (UDC) in Intel's PXA 25x
+ * series processors. The UDC for the IXP 4xx series is very similar.
+ * There are fifteen endpoints, in addition to ep0.
+ *
+ * Such controller drivers work with a gadget driver. The gadget driver
+ * returns descriptors, implements configuration and data protocols used
+ * by the host to interact with this device, and allocates endpoints to
+ * the different protocol interfaces. The controller driver virtualizes
+ * usb hardware so that the gadget drivers will be more portable.
+ *
+ * This UDC hardware wants to implement a bit too much USB protocol, so
+ * it constrains the sorts of USB configuration change events that work.
+ * The errata for these chips are misleading; some "fixed" bugs from
+ * pxa250 a0/a1 b0/b1/b2 sure act like they're still there.
+ *
+ * Note that the UDC hardware supports DMA (except on IXP) but that's
+ * not used here. IN-DMA (to host) is simple enough, when the data is
+ * suitably aligned (16 bytes) ... the network stack doesn't do that,
+ * other software can. OUT-DMA is buggy in most chip versions, as well
+ * as poorly designed (data toggle not automatic). So this driver won't
+ * bother using DMA. (Mostly-working IN-DMA support was available in
+ * kernels before 2.6.23, but was never enabled or well tested.)
+ */
+
+#define DRIVER_VERSION "30-June-2007"
+#define DRIVER_DESC "PXA 25x USB Device Controller driver"
+
+
+static const char driver_name [] = "pxa25x_udc";
+
+static const char ep0name [] = "ep0";
+
+
+#ifdef CONFIG_ARCH_IXP4XX
+
+/* cpu-specific register addresses are compiled in to this code */
+#ifdef CONFIG_ARCH_PXA
+#error "Can't configure both IXP and PXA"
+#endif
+
+/* IXP doesn't yet support <linux/clk.h> */
+#define clk_get(dev,name) NULL
+#define clk_enable(clk) do { } while (0)
+#define clk_disable(clk) do { } while (0)
+#define clk_put(clk) do { } while (0)
+
+#endif
+
+#include "pxa25x_udc.h"
+
+
+#ifdef CONFIG_USB_PXA25X_SMALL
+#define SIZE_STR " (small)"
+#else
+#define SIZE_STR ""
+#endif
+
+/* ---------------------------------------------------------------------------
+ * endpoint related parts of the api to the usb controller hardware,
+ * used by gadget driver; and the inner talker-to-hardware core.
+ * ---------------------------------------------------------------------------
+ */
+
+static void pxa25x_ep_fifo_flush (struct usb_ep *ep);
+static void nuke (struct pxa25x_ep *, int status);
+
+/* one GPIO should be used to detect VBUS from the host */
+static int is_vbus_present(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_vbus) {
+ int value = gpio_get_value(mach->gpio_vbus);
+ return mach->gpio_vbus_inverted ? !value : value;
+ }
+ if (mach->udc_is_connected)
+ return mach->udc_is_connected();
+ return 1;
+}
+
+/* one GPIO should control a D+ pullup, so host sees this device (or not) */
+static void pullup_off(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_pullup)
+ gpio_set_value(mach->gpio_pullup, 0);
+ else if (mach->udc_command)
+ mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+}
+
+static void pullup_on(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_pullup)
+ gpio_set_value(mach->gpio_pullup, 1);
+ else if (mach->udc_command)
+ mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+}
+
+static void pio_irq_enable(int bEndpointAddress)
+{
+ bEndpointAddress &= 0xf;
+ if (bEndpointAddress < 8)
+ UICR0 &= ~(1 << bEndpointAddress);
+ else {
+ bEndpointAddress -= 8;
+ UICR1 &= ~(1 << bEndpointAddress);
+ }
+}
+
+static void pio_irq_disable(int bEndpointAddress)
+{
+ bEndpointAddress &= 0xf;
+ if (bEndpointAddress < 8)
+ UICR0 |= 1 << bEndpointAddress;
+ else {
+ bEndpointAddress -= 8;
+ UICR1 |= 1 << bEndpointAddress;
+ }
+}
+
+/* The UDCCR reg contains mask and interrupt status bits,
+ * so using '|=' isn't safe as it may ack an interrupt.
+ */
+#define UDCCR_MASK_BITS (UDCCR_REM | UDCCR_SRM | UDCCR_UDE)
+
+static inline void udc_set_mask_UDCCR(int mask)
+{
+ UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS);
+}
+
+static inline void udc_clear_mask_UDCCR(int mask)
+{
+ UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS);
+}
+
+static inline void udc_ack_int_UDCCR(int mask)
+{
+ /* udccr contains the bits we dont want to change */
+ __u32 udccr = UDCCR & UDCCR_MASK_BITS;
+
+ UDCCR = udccr | (mask & ~UDCCR_MASK_BITS);
+}
+
+/*
+ * endpoint enable/disable
+ *
+ * we need to verify the descriptors used to enable endpoints. since pxa25x
+ * endpoint configurations are fixed, and are pretty much always enabled,
+ * there's not a lot to manage here.
+ *
+ * because pxa25x can't selectively initialize bulk (or interrupt) endpoints,
+ * (resetting endpoint halt and toggle), SET_INTERFACE is unusable except
+ * for a single interface (with only the default altsetting) and for gadget
+ * drivers that don't halt endpoints (not reset by set_interface). that also
+ * means that if you use ISO, you must violate the USB spec rule that all
+ * iso endpoints must be in non-default altsettings.
+ */
+static int pxa25x_ep_enable (struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct pxa25x_ep *ep;
+ struct pxa25x_udc *dev;
+
+ ep = container_of (_ep, struct pxa25x_ep, ep);
+ if (!_ep || !desc || ep->desc || _ep->name == ep0name
+ || desc->bDescriptorType != USB_DT_ENDPOINT
+ || ep->bEndpointAddress != desc->bEndpointAddress
+ || ep->fifo_size < le16_to_cpu
+ (desc->wMaxPacketSize)) {
+ DMSG("%s, bad ep or descriptor\n", __func__);
+ return -EINVAL;
+ }
+
+ /* xfer types must match, except that interrupt ~= bulk */
+ if (ep->bmAttributes != desc->bmAttributes
+ && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
+ && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
+ DMSG("%s, %s type mismatch\n", __func__, _ep->name);
+ return -EINVAL;
+ }
+
+ /* hardware _could_ do smaller, but driver doesn't */
+ if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
+ && le16_to_cpu (desc->wMaxPacketSize)
+ != BULK_FIFO_SIZE)
+ || !desc->wMaxPacketSize) {
+ DMSG("%s, bad %s maxpacket\n", __func__, _ep->name);
+ return -ERANGE;
+ }
+
+ dev = ep->dev;
+ if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
+ DMSG("%s, bogus device state\n", __func__);
+ return -ESHUTDOWN;
+ }
+
+ ep->desc = desc;
+ ep->stopped = 0;
+ ep->pio_irqs = 0;
+ ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize);
+
+ /* flush fifo (mostly for OUT buffers) */
+ pxa25x_ep_fifo_flush (_ep);
+
+ /* ... reset halt state too, if we could ... */
+
+ DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
+ return 0;
+}
+
+static int pxa25x_ep_disable (struct usb_ep *_ep)
+{
+ struct pxa25x_ep *ep;
+ unsigned long flags;
+
+ ep = container_of (_ep, struct pxa25x_ep, ep);
+ if (!_ep || !ep->desc) {
+ DMSG("%s, %s not enabled\n", __func__,
+ _ep ? ep->ep.name : NULL);
+ return -EINVAL;
+ }
+ local_irq_save(flags);
+
+ nuke (ep, -ESHUTDOWN);
+
+ /* flush fifo (mostly for IN buffers) */
+ pxa25x_ep_fifo_flush (_ep);
+
+ ep->desc = NULL;
+ ep->stopped = 1;
+
+ local_irq_restore(flags);
+ DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* for the pxa25x, these can just wrap kmalloc/kfree. gadget drivers
+ * must still pass correctly initialized endpoints, since other controller
+ * drivers may care about how it's currently set up (dma issues etc).
+ */
+
+/*
+ * pxa25x_ep_alloc_request - allocate a request data structure
+ */
+static struct usb_request *
+pxa25x_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
+{
+ struct pxa25x_request *req;
+
+ req = kzalloc(sizeof(*req), gfp_flags);
+ if (!req)
+ return NULL;
+
+ INIT_LIST_HEAD (&req->queue);
+ return &req->req;
+}
+
+
+/*
+ * pxa25x_ep_free_request - deallocate a request data structure
+ */
+static void
+pxa25x_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct pxa25x_request *req;
+
+ req = container_of (_req, struct pxa25x_request, req);
+ WARN_ON (!list_empty (&req->queue));
+ kfree(req);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * done - retire a request; caller blocked irqs
+ */
+static void done(struct pxa25x_ep *ep, struct pxa25x_request *req, int status)
+{
+ unsigned stopped = ep->stopped;
+
+ list_del_init(&req->queue);
+
+ if (likely (req->req.status == -EINPROGRESS))
+ req->req.status = status;
+ else
+ status = req->req.status;
+
+ if (status && status != -ESHUTDOWN)
+ DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n",
+ ep->ep.name, &req->req, status,
+ req->req.actual, req->req.length);
+
+ /* don't modify queue heads during completion callback */
+ ep->stopped = 1;
+ req->req.complete(&ep->ep, &req->req);
+ ep->stopped = stopped;
+}
+
+
+static inline void ep0_idle (struct pxa25x_udc *dev)
+{
+ dev->ep0state = EP0_IDLE;
+}
+
+static int
+write_packet(volatile u32 *uddr, struct pxa25x_request *req, unsigned max)
+{
+ u8 *buf;
+ unsigned length, count;
+
+ buf = req->req.buf + req->req.actual;
+ prefetch(buf);
+
+ /* how big will this packet be? */
+ length = min(req->req.length - req->req.actual, max);
+ req->req.actual += length;
+
+ count = length;
+ while (likely(count--))
+ *uddr = *buf++;
+
+ return length;
+}
+
+/*
+ * write to an IN endpoint fifo, as many packets as possible.
+ * irqs will use this to write the rest later.
+ * caller guarantees at least one packet buffer is ready (or a zlp).
+ */
+static int
+write_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
+{
+ unsigned max;
+
+ max = le16_to_cpu(ep->desc->wMaxPacketSize);
+ do {
+ unsigned count;
+ int is_last, is_short;
+
+ count = write_packet(ep->reg_uddr, req, max);
+
+ /* last packet is usually short (or a zlp) */
+ if (unlikely (count != max))
+ is_last = is_short = 1;
+ else {
+ if (likely(req->req.length != req->req.actual)
+ || req->req.zero)
+ is_last = 0;
+ else
+ is_last = 1;
+ /* interrupt/iso maxpacket may not fill the fifo */
+ is_short = unlikely (max < ep->fifo_size);
+ }
+
+ DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n",
+ ep->ep.name, count,
+ is_last ? "/L" : "", is_short ? "/S" : "",
+ req->req.length - req->req.actual, req);
+
+ /* let loose that packet. maybe try writing another one,
+ * double buffering might work. TSP, TPC, and TFS
+ * bit values are the same for all normal IN endpoints.
+ */
+ *ep->reg_udccs = UDCCS_BI_TPC;
+ if (is_short)
+ *ep->reg_udccs = UDCCS_BI_TSP;
+
+ /* requests complete when all IN data is in the FIFO */
+ if (is_last) {
+ done (ep, req, 0);
+ if (list_empty(&ep->queue))
+ pio_irq_disable (ep->bEndpointAddress);
+ return 1;
+ }
+
+ // TODO experiment: how robust can fifo mode tweaking be?
+ // double buffering is off in the default fifo mode, which
+ // prevents TFS from being set here.
+
+ } while (*ep->reg_udccs & UDCCS_BI_TFS);
+ return 0;
+}
+
+/* caller asserts req->pending (ep0 irq status nyet cleared); starts
+ * ep0 data stage. these chips want very simple state transitions.
+ */
+static inline
+void ep0start(struct pxa25x_udc *dev, u32 flags, const char *tag)
+{
+ UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR;
+ USIR0 = USIR0_IR0;
+ dev->req_pending = 0;
+ DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n",
+ __func__, tag, UDCCS0, flags);
+}
+
+static int
+write_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
+{
+ unsigned count;
+ int is_short;
+
+ count = write_packet(&UDDR0, req, EP0_FIFO_SIZE);
+ ep->dev->stats.write.bytes += count;
+
+ /* last packet "must be" short (or a zlp) */
+ is_short = (count != EP0_FIFO_SIZE);
+
+ DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count,
+ req->req.length - req->req.actual, req);
+
+ if (unlikely (is_short)) {
+ if (ep->dev->req_pending)
+ ep0start(ep->dev, UDCCS0_IPR, "short IN");
+ else
+ UDCCS0 = UDCCS0_IPR;
+
+ count = req->req.length;
+ done (ep, req, 0);
+ ep0_idle(ep->dev);
+#ifndef CONFIG_ARCH_IXP4XX
+#if 1
+ /* This seems to get rid of lost status irqs in some cases:
+ * host responds quickly, or next request involves config
+ * change automagic, or should have been hidden, or ...
+ *
+ * FIXME get rid of all udelays possible...
+ */
+ if (count >= EP0_FIFO_SIZE) {
+ count = 100;
+ do {
+ if ((UDCCS0 & UDCCS0_OPR) != 0) {
+ /* clear OPR, generate ack */
+ UDCCS0 = UDCCS0_OPR;
+ break;
+ }
+ count--;
+ udelay(1);
+ } while (count);
+ }
+#endif
+#endif
+ } else if (ep->dev->req_pending)
+ ep0start(ep->dev, 0, "IN");
+ return is_short;
+}
+
+
+/*
+ * read_fifo - unload packet(s) from the fifo we use for usb OUT
+ * transfers and put them into the request. caller should have made
+ * sure there's at least one packet ready.
+ *
+ * returns true if the request completed because of short packet or the
+ * request buffer having filled (and maybe overran till end-of-packet).
+ */
+static int
+read_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
+{
+ for (;;) {
+ u32 udccs;
+ u8 *buf;
+ unsigned bufferspace, count, is_short;
+
+ /* make sure there's a packet in the FIFO.
+ * UDCCS_{BO,IO}_RPC are all the same bit value.
+ * UDCCS_{BO,IO}_RNE are all the same bit value.
+ */
+ udccs = *ep->reg_udccs;
+ if (unlikely ((udccs & UDCCS_BO_RPC) == 0))
+ break;
+ buf = req->req.buf + req->req.actual;
+ prefetchw(buf);
+ bufferspace = req->req.length - req->req.actual;
+
+ /* read all bytes from this packet */
+ if (likely (udccs & UDCCS_BO_RNE)) {
+ count = 1 + (0x0ff & *ep->reg_ubcr);
+ req->req.actual += min (count, bufferspace);
+ } else /* zlp */
+ count = 0;
+ is_short = (count < ep->ep.maxpacket);
+ DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n",
+ ep->ep.name, udccs, count,
+ is_short ? "/S" : "",
+ req, req->req.actual, req->req.length);
+ while (likely (count-- != 0)) {
+ u8 byte = (u8) *ep->reg_uddr;
+
+ if (unlikely (bufferspace == 0)) {
+ /* this happens when the driver's buffer
+ * is smaller than what the host sent.
+ * discard the extra data.
+ */
+ if (req->req.status != -EOVERFLOW)
+ DMSG("%s overflow %d\n",
+ ep->ep.name, count);
+ req->req.status = -EOVERFLOW;
+ } else {
+ *buf++ = byte;
+ bufferspace--;
+ }
+ }
+ *ep->reg_udccs = UDCCS_BO_RPC;
+ /* RPC/RSP/RNE could now reflect the other packet buffer */
+
+ /* iso is one request per packet */
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+ if (udccs & UDCCS_IO_ROF)
+ req->req.status = -EHOSTUNREACH;
+ /* more like "is_done" */
+ is_short = 1;
+ }
+
+ /* completion */
+ if (is_short || req->req.actual == req->req.length) {
+ done (ep, req, 0);
+ if (list_empty(&ep->queue))
+ pio_irq_disable (ep->bEndpointAddress);
+ return 1;
+ }
+
+ /* finished that packet. the next one may be waiting... */
+ }
+ return 0;
+}
+
+/*
+ * special ep0 version of the above. no UBCR0 or double buffering; status
+ * handshaking is magic. most device protocols don't need control-OUT.
+ * CDC vendor commands (and RNDIS), mass storage CB/CBI, and some other
+ * protocols do use them.
+ */
+static int
+read_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
+{
+ u8 *buf, byte;
+ unsigned bufferspace;
+
+ buf = req->req.buf + req->req.actual;
+ bufferspace = req->req.length - req->req.actual;
+
+ while (UDCCS0 & UDCCS0_RNE) {
+ byte = (u8) UDDR0;
+
+ if (unlikely (bufferspace == 0)) {
+ /* this happens when the driver's buffer
+ * is smaller than what the host sent.
+ * discard the extra data.
+ */
+ if (req->req.status != -EOVERFLOW)
+ DMSG("%s overflow\n", ep->ep.name);
+ req->req.status = -EOVERFLOW;
+ } else {
+ *buf++ = byte;
+ req->req.actual++;
+ bufferspace--;
+ }
+ }
+
+ UDCCS0 = UDCCS0_OPR | UDCCS0_IPR;
+
+ /* completion */
+ if (req->req.actual >= req->req.length)
+ return 1;
+
+ /* finished that packet. the next one may be waiting... */
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int
+pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
+{
+ struct pxa25x_request *req;
+ struct pxa25x_ep *ep;
+ struct pxa25x_udc *dev;
+ unsigned long flags;
+
+ req = container_of(_req, struct pxa25x_request, req);
+ if (unlikely (!_req || !_req->complete || !_req->buf
+ || !list_empty(&req->queue))) {
+ DMSG("%s, bad params\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct pxa25x_ep, ep);
+ if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+ DMSG("%s, bad ep\n", __func__);
+ return -EINVAL;
+ }
+
+ dev = ep->dev;
+ if (unlikely (!dev->driver
+ || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
+ DMSG("%s, bogus device state\n", __func__);
+ return -ESHUTDOWN;
+ }
+
+ /* iso is always one packet per request, that's the only way
+ * we can report per-packet status. that also helps with dma.
+ */
+ if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
+ && req->req.length > le16_to_cpu
+ (ep->desc->wMaxPacketSize)))
+ return -EMSGSIZE;
+
+ DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
+ _ep->name, _req, _req->length, _req->buf);
+
+ local_irq_save(flags);
+
+ _req->status = -EINPROGRESS;
+ _req->actual = 0;
+
+ /* kickstart this i/o queue? */
+ if (list_empty(&ep->queue) && !ep->stopped) {
+ if (ep->desc == NULL/* ep0 */) {
+ unsigned length = _req->length;
+
+ switch (dev->ep0state) {
+ case EP0_IN_DATA_PHASE:
+ dev->stats.write.ops++;
+ if (write_ep0_fifo(ep, req))
+ req = NULL;
+ break;
+
+ case EP0_OUT_DATA_PHASE:
+ dev->stats.read.ops++;
+ /* messy ... */
+ if (dev->req_config) {
+ DBG(DBG_VERBOSE, "ep0 config ack%s\n",
+ dev->has_cfr ? "" : " raced");
+ if (dev->has_cfr)
+ UDCCFR = UDCCFR_AREN|UDCCFR_ACM
+ |UDCCFR_MB1;
+ done(ep, req, 0);
+ dev->ep0state = EP0_END_XFER;
+ local_irq_restore (flags);
+ return 0;
+ }
+ if (dev->req_pending)
+ ep0start(dev, UDCCS0_IPR, "OUT");
+ if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0
+ && read_ep0_fifo(ep, req))) {
+ ep0_idle(dev);
+ done(ep, req, 0);
+ req = NULL;
+ }
+ break;
+
+ default:
+ DMSG("ep0 i/o, odd state %d\n", dev->ep0state);
+ local_irq_restore (flags);
+ return -EL2HLT;
+ }
+ /* can the FIFO can satisfy the request immediately? */
+ } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
+ if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0
+ && write_fifo(ep, req))
+ req = NULL;
+ } else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0
+ && read_fifo(ep, req)) {
+ req = NULL;
+ }
+
+ if (likely (req && ep->desc))
+ pio_irq_enable(ep->bEndpointAddress);
+ }
+
+ /* pio or dma irq handler advances the queue. */
+ if (likely(req != NULL))
+ list_add_tail(&req->queue, &ep->queue);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+
+/*
+ * nuke - dequeue ALL requests
+ */
+static void nuke(struct pxa25x_ep *ep, int status)
+{
+ struct pxa25x_request *req;
+
+ /* called with irqs blocked */
+ while (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next,
+ struct pxa25x_request,
+ queue);
+ done(ep, req, status);
+ }
+ if (ep->desc)
+ pio_irq_disable (ep->bEndpointAddress);
+}
+
+
+/* dequeue JUST ONE request */
+static int pxa25x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct pxa25x_ep *ep;
+ struct pxa25x_request *req;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct pxa25x_ep, ep);
+ if (!_ep || ep->ep.name == ep0name)
+ return -EINVAL;
+
+ local_irq_save(flags);
+
+ /* 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) {
+ local_irq_restore(flags);
+ return -EINVAL;
+ }
+
+ done(ep, req, -ECONNRESET);
+
+ local_irq_restore(flags);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int pxa25x_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ struct pxa25x_ep *ep;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct pxa25x_ep, ep);
+ if (unlikely (!_ep
+ || (!ep->desc && ep->ep.name != ep0name))
+ || ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+ DMSG("%s, bad ep\n", __func__);
+ return -EINVAL;
+ }
+ if (value == 0) {
+ /* this path (reset toggle+halt) is needed to implement
+ * SET_INTERFACE on normal hardware. but it can't be
+ * done from software on the PXA UDC, and the hardware
+ * forgets to do it as part of SET_INTERFACE automagic.
+ */
+ DMSG("only host can clear %s halt\n", _ep->name);
+ return -EROFS;
+ }
+
+ local_irq_save(flags);
+
+ if ((ep->bEndpointAddress & USB_DIR_IN) != 0
+ && ((*ep->reg_udccs & UDCCS_BI_TFS) == 0
+ || !list_empty(&ep->queue))) {
+ local_irq_restore(flags);
+ return -EAGAIN;
+ }
+
+ /* FST bit is the same for control, bulk in, bulk out, interrupt in */
+ *ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF;
+
+ /* ep0 needs special care */
+ if (!ep->desc) {
+ start_watchdog(ep->dev);
+ ep->dev->req_pending = 0;
+ ep->dev->ep0state = EP0_STALL;
+
+ /* and bulk/intr endpoints like dropping stalls too */
+ } else {
+ unsigned i;
+ for (i = 0; i < 1000; i += 20) {
+ if (*ep->reg_udccs & UDCCS_BI_SST)
+ break;
+ udelay(20);
+ }
+ }
+ local_irq_restore(flags);
+
+ DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
+ return 0;
+}
+
+static int pxa25x_ep_fifo_status(struct usb_ep *_ep)
+{
+ struct pxa25x_ep *ep;
+
+ ep = container_of(_ep, struct pxa25x_ep, ep);
+ if (!_ep) {
+ DMSG("%s, bad ep\n", __func__);
+ return -ENODEV;
+ }
+ /* pxa can't report unclaimed bytes from IN fifos */
+ if ((ep->bEndpointAddress & USB_DIR_IN) != 0)
+ return -EOPNOTSUPP;
+ if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN
+ || (*ep->reg_udccs & UDCCS_BO_RFS) == 0)
+ return 0;
+ else
+ return (*ep->reg_ubcr & 0xfff) + 1;
+}
+
+static void pxa25x_ep_fifo_flush(struct usb_ep *_ep)
+{
+ struct pxa25x_ep *ep;
+
+ ep = container_of(_ep, struct pxa25x_ep, ep);
+ if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) {
+ DMSG("%s, bad ep\n", __func__);
+ return;
+ }
+
+ /* toggle and halt bits stay unchanged */
+
+ /* for OUT, just read and discard the FIFO contents. */
+ if ((ep->bEndpointAddress & USB_DIR_IN) == 0) {
+ while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0)
+ (void) *ep->reg_uddr;
+ return;
+ }
+
+ /* most IN status is the same, but ISO can't stall */
+ *ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR
+ | (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
+ ? 0 : UDCCS_BI_SST;
+}
+
+
+static struct usb_ep_ops pxa25x_ep_ops = {
+ .enable = pxa25x_ep_enable,
+ .disable = pxa25x_ep_disable,
+
+ .alloc_request = pxa25x_ep_alloc_request,
+ .free_request = pxa25x_ep_free_request,
+
+ .queue = pxa25x_ep_queue,
+ .dequeue = pxa25x_ep_dequeue,
+
+ .set_halt = pxa25x_ep_set_halt,
+ .fifo_status = pxa25x_ep_fifo_status,
+ .fifo_flush = pxa25x_ep_fifo_flush,
+};
+
+
+/* ---------------------------------------------------------------------------
+ * device-scoped parts of the api to the usb controller hardware
+ * ---------------------------------------------------------------------------
+ */
+
+static int pxa25x_udc_get_frame(struct usb_gadget *_gadget)
+{
+ return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff);
+}
+
+static int pxa25x_udc_wakeup(struct usb_gadget *_gadget)
+{
+ /* host may not have enabled remote wakeup */
+ if ((UDCCS0 & UDCCS0_DRWF) == 0)
+ return -EHOSTUNREACH;
+ udc_set_mask_UDCCR(UDCCR_RSM);
+ return 0;
+}
+
+static void stop_activity(struct pxa25x_udc *, struct usb_gadget_driver *);
+static void udc_enable (struct pxa25x_udc *);
+static void udc_disable(struct pxa25x_udc *);
+
+/* We disable the UDC -- and its 48 MHz clock -- whenever it's not
+ * in active use.
+ */
+static int pullup(struct pxa25x_udc *udc)
+{
+ int is_active = udc->vbus && udc->pullup && !udc->suspended;
+ DMSG("%s\n", is_active ? "active" : "inactive");
+ if (is_active) {
+ if (!udc->active) {
+ udc->active = 1;
+ /* Enable clock for USB device */
+ clk_enable(udc->clk);
+ udc_enable(udc);
+ }
+ } else {
+ if (udc->active) {
+ if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+ DMSG("disconnect %s\n", udc->driver
+ ? udc->driver->driver.name
+ : "(no driver)");
+ stop_activity(udc, udc->driver);
+ }
+ udc_disable(udc);
+ /* Disable clock for USB device */
+ clk_disable(udc->clk);
+ udc->active = 0;
+ }
+
+ }
+ return 0;
+}
+
+/* VBUS reporting logically comes from a transceiver */
+static int pxa25x_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
+{
+ struct pxa25x_udc *udc;
+
+ udc = container_of(_gadget, struct pxa25x_udc, gadget);
+ udc->vbus = (is_active != 0);
+ DMSG("vbus %s\n", is_active ? "supplied" : "inactive");
+ pullup(udc);
+ return 0;
+}
+
+/* drivers may have software control over D+ pullup */
+static int pxa25x_udc_pullup(struct usb_gadget *_gadget, int is_active)
+{
+ struct pxa25x_udc *udc;
+
+ udc = container_of(_gadget, struct pxa25x_udc, gadget);
+
+ /* not all boards support pullup control */
+ if (!udc->mach->gpio_pullup && !udc->mach->udc_command)
+ return -EOPNOTSUPP;
+
+ udc->pullup = (is_active != 0);
+ pullup(udc);
+ return 0;
+}
+
+static const struct usb_gadget_ops pxa25x_udc_ops = {
+ .get_frame = pxa25x_udc_get_frame,
+ .wakeup = pxa25x_udc_wakeup,
+ .vbus_session = pxa25x_udc_vbus_session,
+ .pullup = pxa25x_udc_pullup,
+
+ // .vbus_draw ... boards may consume current from VBUS, up to
+ // 100-500mA based on config. the 500uA suspend ceiling means
+ // that exclusively vbus-powered PXA designs violate USB specs.
+};
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
+
+static int
+udc_seq_show(struct seq_file *m, void *_d)
+{
+ struct pxa25x_udc *dev = m->private;
+ unsigned long flags;
+ int i;
+ u32 tmp;
+
+ local_irq_save(flags);
+
+ /* basic device status */
+ seq_printf(m, DRIVER_DESC "\n"
+ "%s version: %s\nGadget driver: %s\nHost %s\n\n",
+ driver_name, DRIVER_VERSION SIZE_STR "(pio)",
+ dev->driver ? dev->driver->driver.name : "(none)",
+ is_vbus_present() ? "full speed" : "disconnected");
+
+ /* registers for device and ep0 */
+ seq_printf(m,
+ "uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
+ UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
+
+ tmp = UDCCR;
+ seq_printf(m,
+ "udccr %02X =%s%s%s%s%s%s%s%s\n", tmp,
+ (tmp & UDCCR_REM) ? " rem" : "",
+ (tmp & UDCCR_RSTIR) ? " rstir" : "",
+ (tmp & UDCCR_SRM) ? " srm" : "",
+ (tmp & UDCCR_SUSIR) ? " susir" : "",
+ (tmp & UDCCR_RESIR) ? " resir" : "",
+ (tmp & UDCCR_RSM) ? " rsm" : "",
+ (tmp & UDCCR_UDA) ? " uda" : "",
+ (tmp & UDCCR_UDE) ? " ude" : "");
+
+ tmp = UDCCS0;
+ seq_printf(m,
+ "udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp,
+ (tmp & UDCCS0_SA) ? " sa" : "",
+ (tmp & UDCCS0_RNE) ? " rne" : "",
+ (tmp & UDCCS0_FST) ? " fst" : "",
+ (tmp & UDCCS0_SST) ? " sst" : "",
+ (tmp & UDCCS0_DRWF) ? " dwrf" : "",
+ (tmp & UDCCS0_FTF) ? " ftf" : "",
+ (tmp & UDCCS0_IPR) ? " ipr" : "",
+ (tmp & UDCCS0_OPR) ? " opr" : "");
+
+ if (dev->has_cfr) {
+ tmp = UDCCFR;
+ seq_printf(m,
+ "udccfr %02X =%s%s\n", tmp,
+ (tmp & UDCCFR_AREN) ? " aren" : "",
+ (tmp & UDCCFR_ACM) ? " acm" : "");
+ }
+
+ if (!is_vbus_present() || !dev->driver)
+ goto done;
+
+ seq_printf(m, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
+ dev->stats.write.bytes, dev->stats.write.ops,
+ dev->stats.read.bytes, dev->stats.read.ops,
+ dev->stats.irqs);
+
+ /* dump endpoint queues */
+ for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
+ struct pxa25x_ep *ep = &dev->ep [i];
+ struct pxa25x_request *req;
+
+ if (i != 0) {
+ const struct usb_endpoint_descriptor *desc;
+
+ desc = ep->desc;
+ if (!desc)
+ continue;
+ tmp = *dev->ep [i].reg_udccs;
+ seq_printf(m,
+ "%s max %d %s udccs %02x irqs %lu\n",
+ ep->ep.name, le16_to_cpu(desc->wMaxPacketSize),
+ "pio", tmp, ep->pio_irqs);
+ /* TODO translate all five groups of udccs bits! */
+
+ } else /* ep0 should only have one transfer queued */
+ seq_printf(m, "ep0 max 16 pio irqs %lu\n",
+ ep->pio_irqs);
+
+ if (list_empty(&ep->queue)) {
+ seq_printf(m, "\t(nothing queued)\n");
+ continue;
+ }
+ list_for_each_entry(req, &ep->queue, queue) {
+ seq_printf(m,
+ "\treq %p len %d/%d buf %p\n",
+ &req->req, req->req.actual,
+ req->req.length, req->req.buf);
+ }
+ }
+
+done:
+ local_irq_restore(flags);
+ return 0;
+}
+
+static int
+udc_debugfs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, udc_seq_show, inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+ .open = udc_debugfs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
+#define create_debug_files(dev) \
+ do { \
+ dev->debugfs_udc = debugfs_create_file(dev->gadget.name, \
+ S_IRUGO, NULL, dev, &debug_fops); \
+ } while (0)
+#define remove_debug_files(dev) \
+ do { \
+ if (dev->debugfs_udc) \
+ debugfs_remove(dev->debugfs_udc); \
+ } while (0)
+
+#else /* !CONFIG_USB_GADGET_DEBUG_FILES */
+
+#define create_debug_files(dev) do {} while (0)
+#define remove_debug_files(dev) do {} while (0)
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * udc_disable - disable USB device controller
+ */
+static void udc_disable(struct pxa25x_udc *dev)
+{
+ /* block all irqs */
+ udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM);
+ UICR0 = UICR1 = 0xff;
+ UFNRH = UFNRH_SIM;
+
+ /* if hardware supports it, disconnect from usb */
+ pullup_off();
+
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ ep0_idle (dev);
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+}
+
+
+/*
+ * udc_reinit - initialize software state
+ */
+static void udc_reinit(struct pxa25x_udc *dev)
+{
+ u32 i;
+
+ /* device/ep0 records init */
+ INIT_LIST_HEAD (&dev->gadget.ep_list);
+ INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
+ dev->ep0state = EP0_IDLE;
+
+ /* basic endpoint records init */
+ for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
+ struct pxa25x_ep *ep = &dev->ep[i];
+
+ if (i != 0)
+ list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
+
+ ep->desc = NULL;
+ ep->stopped = 0;
+ INIT_LIST_HEAD (&ep->queue);
+ ep->pio_irqs = 0;
+ }
+
+ /* the rest was statically initialized, and is read-only */
+}
+
+/* until it's enabled, this UDC should be completely invisible
+ * to any USB host.
+ */
+static void udc_enable (struct pxa25x_udc *dev)
+{
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ /* try to clear these bits before we enable the udc */
+ udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR);
+
+ ep0_idle(dev);
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+ dev->stats.irqs = 0;
+
+ /*
+ * sequence taken from chapter 12.5.10, PXA250 AppProcDevManual:
+ * - enable UDC
+ * - if RESET is already in progress, ack interrupt
+ * - unmask reset interrupt
+ */
+ udc_set_mask_UDCCR(UDCCR_UDE);
+ if (!(UDCCR & UDCCR_UDA))
+ udc_ack_int_UDCCR(UDCCR_RSTIR);
+
+ if (dev->has_cfr /* UDC_RES2 is defined */) {
+ /* pxa255 (a0+) can avoid a set_config race that could
+ * prevent gadget drivers from configuring correctly
+ */
+ UDCCFR = UDCCFR_ACM | UDCCFR_MB1;
+ } else {
+ /* "USB test mode" for pxa250 errata 40-42 (stepping a0, a1)
+ * which could result in missing packets and interrupts.
+ * supposedly one bit per endpoint, controlling whether it
+ * double buffers or not; ACM/AREN bits fit into the holes.
+ * zero bits (like USIR0_IRx) disable double buffering.
+ */
+ UDC_RES1 = 0x00;
+ UDC_RES2 = 0x00;
+ }
+
+ /* enable suspend/resume and reset irqs */
+ udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM);
+
+ /* enable ep0 irqs */
+ UICR0 &= ~UICR0_IM0;
+
+ /* if hardware supports it, pullup D+ and wait for reset */
+ pullup_on();
+}
+
+
+/* when a driver is successfully registered, it will receive
+ * control requests including set_configuration(), which enables
+ * non-control requests. then usb traffic follows until a
+ * disconnect is reported. then a host may connect again, or
+ * the driver might get unbound.
+ */
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ struct pxa25x_udc *dev = the_controller;
+ int retval;
+
+ if (!driver
+ || driver->speed < USB_SPEED_FULL
+ || !driver->bind
+ || !driver->disconnect
+ || !driver->setup)
+ return -EINVAL;
+ if (!dev)
+ return -ENODEV;
+ if (dev->driver)
+ return -EBUSY;
+
+ /* first hook up the driver ... */
+ dev->driver = driver;
+ dev->gadget.dev.driver = &driver->driver;
+ dev->pullup = 1;
+
+ retval = device_add (&dev->gadget.dev);
+ if (retval) {
+fail:
+ dev->driver = NULL;
+ dev->gadget.dev.driver = NULL;
+ return retval;
+ }
+ retval = driver->bind(&dev->gadget);
+ if (retval) {
+ DMSG("bind to driver %s --> error %d\n",
+ driver->driver.name, retval);
+ device_del (&dev->gadget.dev);
+ goto fail;
+ }
+
+ /* ... then enable host detection and ep0; and we're ready
+ * for set_configuration as well as eventual disconnect.
+ */
+ DMSG("registered gadget driver '%s'\n", driver->driver.name);
+ pullup(dev);
+ dump_state(dev);
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+static void
+stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
+{
+ int i;
+
+ /* don't disconnect drivers more than once */
+ if (dev->gadget.speed == USB_SPEED_UNKNOWN)
+ driver = NULL;
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+
+ /* prevent new request submissions, kill any outstanding requests */
+ for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
+ struct pxa25x_ep *ep = &dev->ep[i];
+
+ ep->stopped = 1;
+ nuke(ep, -ESHUTDOWN);
+ }
+ del_timer_sync(&dev->timer);
+
+ /* report disconnect; the driver is already quiesced */
+ if (driver)
+ driver->disconnect(&dev->gadget);
+
+ /* re-init driver-visible data structures */
+ udc_reinit(dev);
+}
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct pxa25x_udc *dev = the_controller;
+
+ if (!dev)
+ return -ENODEV;
+ if (!driver || driver != dev->driver || !driver->unbind)
+ return -EINVAL;
+
+ local_irq_disable();
+ dev->pullup = 0;
+ pullup(dev);
+ stop_activity(dev, driver);
+ local_irq_enable();
+
+ driver->unbind(&dev->gadget);
+ dev->gadget.dev.driver = NULL;
+ dev->driver = NULL;
+
+ device_del (&dev->gadget.dev);
+
+ DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
+ dump_state(dev);
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_ARCH_LUBBOCK
+
+/* Lubbock has separate connect and disconnect irqs. More typical designs
+ * use one GPIO as the VBUS IRQ, and another to control the D+ pullup.
+ */
+
+static irqreturn_t
+lubbock_vbus_irq(int irq, void *_dev)
+{
+ struct pxa25x_udc *dev = _dev;
+ int vbus;
+
+ dev->stats.irqs++;
+ switch (irq) {
+ case LUBBOCK_USB_IRQ:
+ vbus = 1;
+ disable_irq(LUBBOCK_USB_IRQ);
+ enable_irq(LUBBOCK_USB_DISC_IRQ);
+ break;
+ case LUBBOCK_USB_DISC_IRQ:
+ vbus = 0;
+ disable_irq(LUBBOCK_USB_DISC_IRQ);
+ enable_irq(LUBBOCK_USB_IRQ);
+ break;
+ default:
+ return IRQ_NONE;
+ }
+
+ pxa25x_udc_vbus_session(&dev->gadget, vbus);
+ return IRQ_HANDLED;
+}
+
+#endif
+
+static irqreturn_t udc_vbus_irq(int irq, void *_dev)
+{
+ struct pxa25x_udc *dev = _dev;
+ int vbus = gpio_get_value(dev->mach->gpio_vbus);
+
+ if (dev->mach->gpio_vbus_inverted)
+ vbus = !vbus;
+
+ pxa25x_udc_vbus_session(&dev->gadget, vbus);
+ return IRQ_HANDLED;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static inline void clear_ep_state (struct pxa25x_udc *dev)
+{
+ unsigned i;
+
+ /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
+ * fifos, and pending transactions mustn't be continued in any case.
+ */
+ for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++)
+ nuke(&dev->ep[i], -ECONNABORTED);
+}
+
+static void udc_watchdog(unsigned long _dev)
+{
+ struct pxa25x_udc *dev = (void *)_dev;
+
+ local_irq_disable();
+ if (dev->ep0state == EP0_STALL
+ && (UDCCS0 & UDCCS0_FST) == 0
+ && (UDCCS0 & UDCCS0_SST) == 0) {
+ UDCCS0 = UDCCS0_FST|UDCCS0_FTF;
+ DBG(DBG_VERBOSE, "ep0 re-stall\n");
+ start_watchdog(dev);
+ }
+ local_irq_enable();
+}
+
+static void handle_ep0 (struct pxa25x_udc *dev)
+{
+ u32 udccs0 = UDCCS0;
+ struct pxa25x_ep *ep = &dev->ep [0];
+ struct pxa25x_request *req;
+ union {
+ struct usb_ctrlrequest r;
+ u8 raw [8];
+ u32 word [2];
+ } u;
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct pxa25x_request, queue);
+
+ /* clear stall status */
+ if (udccs0 & UDCCS0_SST) {
+ nuke(ep, -EPIPE);
+ UDCCS0 = UDCCS0_SST;
+ del_timer(&dev->timer);
+ ep0_idle(dev);
+ }
+
+ /* previous request unfinished? non-error iff back-to-back ... */
+ if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) {
+ nuke(ep, 0);
+ del_timer(&dev->timer);
+ ep0_idle(dev);
+ }
+
+ switch (dev->ep0state) {
+ case EP0_IDLE:
+ /* late-breaking status? */
+ udccs0 = UDCCS0;
+
+ /* start control request? */
+ if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))
+ == (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) {
+ int i;
+
+ nuke (ep, -EPROTO);
+
+ /* read SETUP packet */
+ for (i = 0; i < 8; i++) {
+ if (unlikely(!(UDCCS0 & UDCCS0_RNE))) {
+bad_setup:
+ DMSG("SETUP %d!\n", i);
+ goto stall;
+ }
+ u.raw [i] = (u8) UDDR0;
+ }
+ if (unlikely((UDCCS0 & UDCCS0_RNE) != 0))
+ goto bad_setup;
+
+got_setup:
+ DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n",
+ u.r.bRequestType, u.r.bRequest,
+ le16_to_cpu(u.r.wValue),
+ le16_to_cpu(u.r.wIndex),
+ le16_to_cpu(u.r.wLength));
+
+ /* cope with automagic for some standard requests. */
+ dev->req_std = (u.r.bRequestType & USB_TYPE_MASK)
+ == USB_TYPE_STANDARD;
+ dev->req_config = 0;
+ dev->req_pending = 1;
+ switch (u.r.bRequest) {
+ /* hardware restricts gadget drivers here! */
+ case USB_REQ_SET_CONFIGURATION:
+ if (u.r.bRequestType == USB_RECIP_DEVICE) {
+ /* reflect hardware's automagic
+ * up to the gadget driver.
+ */
+config_change:
+ dev->req_config = 1;
+ clear_ep_state(dev);
+ /* if !has_cfr, there's no synch
+ * else use AREN (later) not SA|OPR
+ * USIR0_IR0 acts edge sensitive
+ */
+ }
+ break;
+ /* ... and here, even more ... */
+ case USB_REQ_SET_INTERFACE:
+ if (u.r.bRequestType == USB_RECIP_INTERFACE) {
+ /* udc hardware is broken by design:
+ * - altsetting may only be zero;
+ * - hw resets all interfaces' eps;
+ * - ep reset doesn't include halt(?).
+ */
+ DMSG("broken set_interface (%d/%d)\n",
+ le16_to_cpu(u.r.wIndex),
+ le16_to_cpu(u.r.wValue));
+ goto config_change;
+ }
+ break;
+ /* hardware was supposed to hide this */
+ case USB_REQ_SET_ADDRESS:
+ if (u.r.bRequestType == USB_RECIP_DEVICE) {
+ ep0start(dev, 0, "address");
+ return;
+ }
+ break;
+ }
+
+ if (u.r.bRequestType & USB_DIR_IN)
+ dev->ep0state = EP0_IN_DATA_PHASE;
+ else
+ dev->ep0state = EP0_OUT_DATA_PHASE;
+
+ i = dev->driver->setup(&dev->gadget, &u.r);
+ if (i < 0) {
+ /* hardware automagic preventing STALL... */
+ if (dev->req_config) {
+ /* hardware sometimes neglects to tell
+ * tell us about config change events,
+ * so later ones may fail...
+ */
+ WARN("config change %02x fail %d?\n",
+ u.r.bRequest, i);
+ return;
+ /* TODO experiment: if has_cfr,
+ * hardware didn't ACK; maybe we
+ * could actually STALL!
+ */
+ }
+ DBG(DBG_VERBOSE, "protocol STALL, "
+ "%02x err %d\n", UDCCS0, i);
+stall:
+ /* the watchdog timer helps deal with cases
+ * where udc seems to clear FST wrongly, and
+ * then NAKs instead of STALLing.
+ */
+ ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall");
+ start_watchdog(dev);
+ dev->ep0state = EP0_STALL;
+
+ /* deferred i/o == no response yet */
+ } else if (dev->req_pending) {
+ if (likely(dev->ep0state == EP0_IN_DATA_PHASE
+ || dev->req_std || u.r.wLength))
+ ep0start(dev, 0, "defer");
+ else
+ ep0start(dev, UDCCS0_IPR, "defer/IPR");
+ }
+
+ /* expect at least one data or status stage irq */
+ return;
+
+ } else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA))
+ == (UDCCS0_OPR|UDCCS0_SA))) {
+ unsigned i;
+
+ /* pxa210/250 erratum 131 for B0/B1 says RNE lies.
+ * still observed on a pxa255 a0.
+ */
+ DBG(DBG_VERBOSE, "e131\n");
+ nuke(ep, -EPROTO);
+
+ /* read SETUP data, but don't trust it too much */
+ for (i = 0; i < 8; i++)
+ u.raw [i] = (u8) UDDR0;
+ if ((u.r.bRequestType & USB_RECIP_MASK)
+ > USB_RECIP_OTHER)
+ goto stall;
+ if (u.word [0] == 0 && u.word [1] == 0)
+ goto stall;
+ goto got_setup;
+ } else {
+ /* some random early IRQ:
+ * - we acked FST
+ * - IPR cleared
+ * - OPR got set, without SA (likely status stage)
+ */
+ UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR);
+ }
+ break;
+ case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
+ if (udccs0 & UDCCS0_OPR) {
+ UDCCS0 = UDCCS0_OPR|UDCCS0_FTF;
+ DBG(DBG_VERBOSE, "ep0in premature status\n");
+ if (req)
+ done(ep, req, 0);
+ ep0_idle(dev);
+ } else /* irq was IPR clearing */ {
+ if (req) {
+ /* this IN packet might finish the request */
+ (void) write_ep0_fifo(ep, req);
+ } /* else IN token before response was written */
+ }
+ break;
+ case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
+ if (udccs0 & UDCCS0_OPR) {
+ if (req) {
+ /* this OUT packet might finish the request */
+ if (read_ep0_fifo(ep, req))
+ done(ep, req, 0);
+ /* else more OUT packets expected */
+ } /* else OUT token before read was issued */
+ } else /* irq was IPR clearing */ {
+ DBG(DBG_VERBOSE, "ep0out premature status\n");
+ if (req)
+ done(ep, req, 0);
+ ep0_idle(dev);
+ }
+ break;
+ case EP0_END_XFER:
+ if (req)
+ done(ep, req, 0);
+ /* ack control-IN status (maybe in-zlp was skipped)
+ * also appears after some config change events.
+ */
+ if (udccs0 & UDCCS0_OPR)
+ UDCCS0 = UDCCS0_OPR;
+ ep0_idle(dev);
+ break;
+ case EP0_STALL:
+ UDCCS0 = UDCCS0_FST;
+ break;
+ }
+ USIR0 = USIR0_IR0;
+}
+
+static void handle_ep(struct pxa25x_ep *ep)
+{
+ struct pxa25x_request *req;
+ int is_in = ep->bEndpointAddress & USB_DIR_IN;
+ int completed;
+ u32 udccs, tmp;
+
+ do {
+ completed = 0;
+ if (likely (!list_empty(&ep->queue)))
+ req = list_entry(ep->queue.next,
+ struct pxa25x_request, queue);
+ else
+ req = NULL;
+
+ // TODO check FST handling
+
+ udccs = *ep->reg_udccs;
+ if (unlikely(is_in)) { /* irq from TPC, SST, or (ISO) TUR */
+ tmp = UDCCS_BI_TUR;
+ if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
+ tmp |= UDCCS_BI_SST;
+ tmp &= udccs;
+ if (likely (tmp))
+ *ep->reg_udccs = tmp;
+ if (req && likely ((udccs & UDCCS_BI_TFS) != 0))
+ completed = write_fifo(ep, req);
+
+ } else { /* irq from RPC (or for ISO, ROF) */
+ if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
+ tmp = UDCCS_BO_SST | UDCCS_BO_DME;
+ else
+ tmp = UDCCS_IO_ROF | UDCCS_IO_DME;
+ tmp &= udccs;
+ if (likely(tmp))
+ *ep->reg_udccs = tmp;
+
+ /* fifos can hold packets, ready for reading... */
+ if (likely(req)) {
+ completed = read_fifo(ep, req);
+ } else
+ pio_irq_disable (ep->bEndpointAddress);
+ }
+ ep->pio_irqs++;
+ } while (completed);
+}
+
+/*
+ * pxa25x_udc_irq - interrupt handler
+ *
+ * avoid delays in ep0 processing. the control handshaking isn't always
+ * under software control (pxa250c0 and the pxa255 are better), and delays
+ * could cause usb protocol errors.
+ */
+static irqreturn_t
+pxa25x_udc_irq(int irq, void *_dev)
+{
+ struct pxa25x_udc *dev = _dev;
+ int handled;
+
+ dev->stats.irqs++;
+ do {
+ u32 udccr = UDCCR;
+
+ handled = 0;
+
+ /* SUSpend Interrupt Request */
+ if (unlikely(udccr & UDCCR_SUSIR)) {
+ udc_ack_int_UDCCR(UDCCR_SUSIR);
+ handled = 1;
+ DBG(DBG_VERBOSE, "USB suspend%s\n", is_vbus_present()
+ ? "" : "+disconnect");
+
+ if (!is_vbus_present())
+ stop_activity(dev, dev->driver);
+ else if (dev->gadget.speed != USB_SPEED_UNKNOWN
+ && dev->driver
+ && dev->driver->suspend)
+ dev->driver->suspend(&dev->gadget);
+ ep0_idle (dev);
+ }
+
+ /* RESume Interrupt Request */
+ if (unlikely(udccr & UDCCR_RESIR)) {
+ udc_ack_int_UDCCR(UDCCR_RESIR);
+ handled = 1;
+ DBG(DBG_VERBOSE, "USB resume\n");
+
+ if (dev->gadget.speed != USB_SPEED_UNKNOWN
+ && dev->driver
+ && dev->driver->resume
+ && is_vbus_present())
+ dev->driver->resume(&dev->gadget);
+ }
+
+ /* ReSeT Interrupt Request - USB reset */
+ if (unlikely(udccr & UDCCR_RSTIR)) {
+ udc_ack_int_UDCCR(UDCCR_RSTIR);
+ handled = 1;
+
+ if ((UDCCR & UDCCR_UDA) == 0) {
+ DBG(DBG_VERBOSE, "USB reset start\n");
+
+ /* reset driver and endpoints,
+ * in case that's not yet done
+ */
+ stop_activity (dev, dev->driver);
+
+ } else {
+ DBG(DBG_VERBOSE, "USB reset end\n");
+ dev->gadget.speed = USB_SPEED_FULL;
+ memset(&dev->stats, 0, sizeof dev->stats);
+ /* driver and endpoints are still reset */
+ }
+
+ } else {
+ u32 usir0 = USIR0 & ~UICR0;
+ u32 usir1 = USIR1 & ~UICR1;
+ int i;
+
+ if (unlikely (!usir0 && !usir1))
+ continue;
+
+ DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0);
+
+ /* control traffic */
+ if (usir0 & USIR0_IR0) {
+ dev->ep[0].pio_irqs++;
+ handle_ep0(dev);
+ handled = 1;
+ }
+
+ /* endpoint data transfers */
+ for (i = 0; i < 8; i++) {
+ u32 tmp = 1 << i;
+
+ if (i && (usir0 & tmp)) {
+ handle_ep(&dev->ep[i]);
+ USIR0 |= tmp;
+ handled = 1;
+ }
+ if (usir1 & tmp) {
+ handle_ep(&dev->ep[i+8]);
+ USIR1 |= tmp;
+ handled = 1;
+ }
+ }
+ }
+
+ /* we could also ask for 1 msec SOF (SIR) interrupts */
+
+ } while (handled);
+ return IRQ_HANDLED;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void nop_release (struct device *dev)
+{
+ DMSG("%s %s\n", __func__, dev->bus_id);
+}
+
+/* this uses load-time allocation and initialization (instead of
+ * doing it at run-time) to save code, eliminate fault paths, and
+ * be more obviously correct.
+ */
+static struct pxa25x_udc memory = {
+ .gadget = {
+ .ops = &pxa25x_udc_ops,
+ .ep0 = &memory.ep[0].ep,
+ .name = driver_name,
+ .dev = {
+ .bus_id = "gadget",
+ .release = nop_release,
+ },
+ },
+
+ /* control endpoint */
+ .ep[0] = {
+ .ep = {
+ .name = ep0name,
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = EP0_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .reg_udccs = &UDCCS0,
+ .reg_uddr = &UDDR0,
+ },
+
+ /* first group of endpoints */
+ .ep[1] = {
+ .ep = {
+ .name = "ep1in-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 1,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS1,
+ .reg_uddr = &UDDR1,
+ },
+ .ep[2] = {
+ .ep = {
+ .name = "ep2out-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = 2,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS2,
+ .reg_ubcr = &UBCR2,
+ .reg_uddr = &UDDR2,
+ },
+#ifndef CONFIG_USB_PXA25X_SMALL
+ .ep[3] = {
+ .ep = {
+ .name = "ep3in-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 3,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS3,
+ .reg_uddr = &UDDR3,
+ },
+ .ep[4] = {
+ .ep = {
+ .name = "ep4out-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = 4,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS4,
+ .reg_ubcr = &UBCR4,
+ .reg_uddr = &UDDR4,
+ },
+ .ep[5] = {
+ .ep = {
+ .name = "ep5in-int",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = INT_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = INT_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 5,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .reg_udccs = &UDCCS5,
+ .reg_uddr = &UDDR5,
+ },
+
+ /* second group of endpoints */
+ .ep[6] = {
+ .ep = {
+ .name = "ep6in-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 6,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS6,
+ .reg_uddr = &UDDR6,
+ },
+ .ep[7] = {
+ .ep = {
+ .name = "ep7out-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = 7,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS7,
+ .reg_ubcr = &UBCR7,
+ .reg_uddr = &UDDR7,
+ },
+ .ep[8] = {
+ .ep = {
+ .name = "ep8in-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 8,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS8,
+ .reg_uddr = &UDDR8,
+ },
+ .ep[9] = {
+ .ep = {
+ .name = "ep9out-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = 9,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS9,
+ .reg_ubcr = &UBCR9,
+ .reg_uddr = &UDDR9,
+ },
+ .ep[10] = {
+ .ep = {
+ .name = "ep10in-int",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = INT_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = INT_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 10,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .reg_udccs = &UDCCS10,
+ .reg_uddr = &UDDR10,
+ },
+
+ /* third group of endpoints */
+ .ep[11] = {
+ .ep = {
+ .name = "ep11in-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 11,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS11,
+ .reg_uddr = &UDDR11,
+ },
+ .ep[12] = {
+ .ep = {
+ .name = "ep12out-bulk",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = BULK_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = BULK_FIFO_SIZE,
+ .bEndpointAddress = 12,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .reg_udccs = &UDCCS12,
+ .reg_ubcr = &UBCR12,
+ .reg_uddr = &UDDR12,
+ },
+ .ep[13] = {
+ .ep = {
+ .name = "ep13in-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 13,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS13,
+ .reg_uddr = &UDDR13,
+ },
+ .ep[14] = {
+ .ep = {
+ .name = "ep14out-iso",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = ISO_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = ISO_FIFO_SIZE,
+ .bEndpointAddress = 14,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .reg_udccs = &UDCCS14,
+ .reg_ubcr = &UBCR14,
+ .reg_uddr = &UDDR14,
+ },
+ .ep[15] = {
+ .ep = {
+ .name = "ep15in-int",
+ .ops = &pxa25x_ep_ops,
+ .maxpacket = INT_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = INT_FIFO_SIZE,
+ .bEndpointAddress = USB_DIR_IN | 15,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .reg_udccs = &UDCCS15,
+ .reg_uddr = &UDDR15,
+ },
+#endif /* !CONFIG_USB_PXA25X_SMALL */
+};
+
+#define CP15R0_VENDOR_MASK 0xffffe000
+
+#if defined(CONFIG_ARCH_PXA)
+#define CP15R0_XSCALE_VALUE 0x69052000 /* intel/arm/xscale */
+
+#elif defined(CONFIG_ARCH_IXP4XX)
+#define CP15R0_XSCALE_VALUE 0x69054000 /* intel/arm/ixp4xx */
+
+#endif
+
+#define CP15R0_PROD_MASK 0x000003f0
+#define PXA25x 0x00000100 /* and PXA26x */
+#define PXA210 0x00000120
+
+#define CP15R0_REV_MASK 0x0000000f
+
+#define CP15R0_PRODREV_MASK (CP15R0_PROD_MASK | CP15R0_REV_MASK)
+
+#define PXA255_A0 0x00000106 /* or PXA260_B1 */
+#define PXA250_C0 0x00000105 /* or PXA26x_B0 */
+#define PXA250_B2 0x00000104
+#define PXA250_B1 0x00000103 /* or PXA260_A0 */
+#define PXA250_B0 0x00000102
+#define PXA250_A1 0x00000101
+#define PXA250_A0 0x00000100
+
+#define PXA210_C0 0x00000125
+#define PXA210_B2 0x00000124
+#define PXA210_B1 0x00000123
+#define PXA210_B0 0x00000122
+#define IXP425_A0 0x000001c1
+#define IXP425_B0 0x000001f1
+#define IXP465_AD 0x00000200
+
+/*
+ * probe - binds to the platform device
+ */
+static int __init pxa25x_udc_probe(struct platform_device *pdev)
+{
+ struct pxa25x_udc *dev = &memory;
+ int retval, vbus_irq, irq;
+ u32 chiprev;
+
+ /* insist on Intel/ARM/XScale */
+ asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev));
+ if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) {
+ pr_err("%s: not XScale!\n", driver_name);
+ return -ENODEV;
+ }
+
+ /* trigger chiprev-specific logic */
+ switch (chiprev & CP15R0_PRODREV_MASK) {
+#if defined(CONFIG_ARCH_PXA)
+ case PXA255_A0:
+ dev->has_cfr = 1;
+ break;
+ case PXA250_A0:
+ case PXA250_A1:
+ /* A0/A1 "not released"; ep 13, 15 unusable */
+ /* fall through */
+ case PXA250_B2: case PXA210_B2:
+ case PXA250_B1: case PXA210_B1:
+ case PXA250_B0: case PXA210_B0:
+ /* OUT-DMA is broken ... */
+ /* fall through */
+ case PXA250_C0: case PXA210_C0:
+ break;
+#elif defined(CONFIG_ARCH_IXP4XX)
+ case IXP425_A0:
+ case IXP425_B0:
+ case IXP465_AD:
+ dev->has_cfr = 1;
+ break;
+#endif
+ default:
+ pr_err("%s: unrecognized processor: %08x\n",
+ driver_name, chiprev);
+ /* iop3xx, ixp4xx, ... */
+ return -ENODEV;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ dev->clk = clk_get(&pdev->dev, "UDCCLK");
+ if (IS_ERR(dev->clk)) {
+ retval = PTR_ERR(dev->clk);
+ goto err_clk;
+ }
+
+ pr_debug("%s: IRQ %d%s%s\n", driver_name, irq,
+ dev->has_cfr ? "" : " (!cfr)",
+ SIZE_STR "(pio)"
+ );
+
+ /* other non-static parts of init */
+ dev->dev = &pdev->dev;
+ dev->mach = pdev->dev.platform_data;
+
+ if (dev->mach->gpio_vbus) {
+ if ((retval = gpio_request(dev->mach->gpio_vbus,
+ "pxa25x_udc GPIO VBUS"))) {
+ dev_dbg(&pdev->dev,
+ "can't get vbus gpio %d, err: %d\n",
+ dev->mach->gpio_vbus, retval);
+ goto err_gpio_vbus;
+ }
+ gpio_direction_input(dev->mach->gpio_vbus);
+ vbus_irq = gpio_to_irq(dev->mach->gpio_vbus);
+ } else
+ vbus_irq = 0;
+
+ if (dev->mach->gpio_pullup) {
+ if ((retval = gpio_request(dev->mach->gpio_pullup,
+ "pca25x_udc GPIO PULLUP"))) {
+ dev_dbg(&pdev->dev,
+ "can't get pullup gpio %d, err: %d\n",
+ dev->mach->gpio_pullup, retval);
+ goto err_gpio_pullup;
+ }
+ gpio_direction_output(dev->mach->gpio_pullup, 0);
+ }
+
+ init_timer(&dev->timer);
+ dev->timer.function = udc_watchdog;
+ dev->timer.data = (unsigned long) dev;
+
+ device_initialize(&dev->gadget.dev);
+ dev->gadget.dev.parent = &pdev->dev;
+ dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
+
+ the_controller = dev;
+ platform_set_drvdata(pdev, dev);
+
+ udc_disable(dev);
+ udc_reinit(dev);
+
+ dev->vbus = is_vbus_present();
+
+ /* irq setup after old hardware state is cleaned up */
+ retval = request_irq(irq, pxa25x_udc_irq,
+ IRQF_DISABLED, driver_name, dev);
+ if (retval != 0) {
+ pr_err("%s: can't get irq %d, err %d\n",
+ driver_name, irq, retval);
+ goto err_irq1;
+ }
+ dev->got_irq = 1;
+
+#ifdef CONFIG_ARCH_LUBBOCK
+ if (machine_is_lubbock()) {
+ retval = request_irq(LUBBOCK_USB_DISC_IRQ,
+ lubbock_vbus_irq,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
+ driver_name, dev);
+ if (retval != 0) {
+ pr_err("%s: can't get irq %i, err %d\n",
+ driver_name, LUBBOCK_USB_DISC_IRQ, retval);
+lubbock_fail0:
+ goto err_irq_lub;
+ }
+ retval = request_irq(LUBBOCK_USB_IRQ,
+ lubbock_vbus_irq,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
+ driver_name, dev);
+ if (retval != 0) {
+ pr_err("%s: can't get irq %i, err %d\n",
+ driver_name, LUBBOCK_USB_IRQ, retval);
+ free_irq(LUBBOCK_USB_DISC_IRQ, dev);
+ goto lubbock_fail0;
+ }
+ } else
+#endif
+ if (vbus_irq) {
+ retval = request_irq(vbus_irq, udc_vbus_irq,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM |
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ driver_name, dev);
+ if (retval != 0) {
+ pr_err("%s: can't get irq %i, err %d\n",
+ driver_name, vbus_irq, retval);
+ goto err_vbus_irq;
+ }
+ }
+ create_debug_files(dev);
+
+ return 0;
+
+ err_vbus_irq:
+#ifdef CONFIG_ARCH_LUBBOCK
+ free_irq(LUBBOCK_USB_DISC_IRQ, dev);
+ err_irq_lub:
+#endif
+ free_irq(irq, dev);
+ err_irq1:
+ if (dev->mach->gpio_pullup)
+ gpio_free(dev->mach->gpio_pullup);
+ err_gpio_pullup:
+ if (dev->mach->gpio_vbus)
+ gpio_free(dev->mach->gpio_vbus);
+ err_gpio_vbus:
+ clk_put(dev->clk);
+ err_clk:
+ return retval;
+}
+
+static void pxa25x_udc_shutdown(struct platform_device *_dev)
+{
+ pullup_off();
+}
+
+static int __exit pxa25x_udc_remove(struct platform_device *pdev)
+{
+ struct pxa25x_udc *dev = platform_get_drvdata(pdev);
+
+ if (dev->driver)
+ return -EBUSY;
+
+ dev->pullup = 0;
+ pullup(dev);
+
+ remove_debug_files(dev);
+
+ if (dev->got_irq) {
+ free_irq(platform_get_irq(pdev, 0), dev);
+ dev->got_irq = 0;
+ }
+#ifdef CONFIG_ARCH_LUBBOCK
+ if (machine_is_lubbock()) {
+ free_irq(LUBBOCK_USB_DISC_IRQ, dev);
+ free_irq(LUBBOCK_USB_IRQ, dev);
+ }
+#endif
+ if (dev->mach->gpio_vbus) {
+ free_irq(gpio_to_irq(dev->mach->gpio_vbus), dev);
+ gpio_free(dev->mach->gpio_vbus);
+ }
+ if (dev->mach->gpio_pullup)
+ gpio_free(dev->mach->gpio_pullup);
+
+ clk_put(dev->clk);
+
+ platform_set_drvdata(pdev, NULL);
+ the_controller = NULL;
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_PM
+
+/* USB suspend (controlled by the host) and system suspend (controlled
+ * by the PXA) don't necessarily work well together. If USB is active,
+ * the 48 MHz clock is required; so the system can't enter 33 MHz idle
+ * mode, or any deeper PM saving state.
+ *
+ * For now, we punt and forcibly disconnect from the USB host when PXA
+ * enters any suspend state. While we're disconnected, we always disable
+ * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
+ * Boards without software pullup control shouldn't use those states.
+ * VBUS IRQs should probably be ignored so that the PXA device just acts
+ * "dead" to USB hosts until system resume.
+ */
+static int pxa25x_udc_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct pxa25x_udc *udc = platform_get_drvdata(dev);
+ unsigned long flags;
+
+ if (!udc->mach->gpio_pullup && !udc->mach->udc_command)
+ WARN("USB host won't detect disconnect!\n");
+ udc->suspended = 1;
+
+ local_irq_save(flags);
+ pullup(udc);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static int pxa25x_udc_resume(struct platform_device *dev)
+{
+ struct pxa25x_udc *udc = platform_get_drvdata(dev);
+ unsigned long flags;
+
+ udc->suspended = 0;
+ local_irq_save(flags);
+ pullup(udc);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+#else
+#define pxa25x_udc_suspend NULL
+#define pxa25x_udc_resume NULL
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static struct platform_driver udc_driver = {
+ .shutdown = pxa25x_udc_shutdown,
+ .remove = __exit_p(pxa25x_udc_remove),
+ .suspend = pxa25x_udc_suspend,
+ .resume = pxa25x_udc_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "pxa25x-udc",
+ },
+};
+
+static int __init udc_init(void)
+{
+ pr_info("%s: version %s\n", driver_name, DRIVER_VERSION);
+ return platform_driver_probe(&udc_driver, pxa25x_udc_probe);
+}
+module_init(udc_init);
+
+static void __exit udc_exit(void)
+{
+ platform_driver_unregister(&udc_driver);
+}
+module_exit(udc_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa25x-udc");
