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openwrt-xburst/target/linux/pxa/patches-2.6.21/036-270-usb-gadget-udc.patch
juhosg ba2e2fa7be [pxa] refresh 2.6.21 patches 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14454 3c298f89-4303-0410-b956-a3cf2f4a3e73
2009-02-08 19:36:13 +00:00

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70 KiB
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--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -129,6 +129,28 @@ config USB_PXA2XX_SMALL
default y if USB_ETH
default y if USB_G_SERIAL
+config USB_GADGET_PXA27X
+ boolean "PXA 27x"
+ depends on ARCH_PXA && PXA27x
+ help
+ Intel's PXA 27x series XScale ARM-5TE processors include
+ an integrated full speed USB 1.1 device controller.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "pxa27x_udc" and force all
+ gadget drivers to also be dynamically linked.
+
+config USB_PXA27X
+ tristate
+ depends on USB_GADGET_PXA27X
+ default USB_GADGET
+ select USB_GADGET_SELECTED
+
+config USB_PXA27X_DMA
+ bool # "Use DMA support"
+ depends on USB_GADGET_PXA27X
+ default n
+
config USB_GADGET_GOKU
boolean "Toshiba TC86C001 'Goku-S'"
depends on PCI
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_USB_PXA2XX) += pxa2xx_udc.o
obj-$(CONFIG_USB_GOKU) += goku_udc.o
obj-$(CONFIG_USB_OMAP) += omap_udc.o
obj-$(CONFIG_USB_LH7A40X) += lh7a40x_udc.o
+obj-$(CONFIG_USB_PXA27X) += pxa27x_udc.o
obj-$(CONFIG_USB_AT91) += at91_udc.o
obj-$(CONFIG_USB_GADGET_GUMSTIX) += gumstix_gadget.o
--- /dev/null
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -0,0 +1,2352 @@
+/*
+ * linux/drivers/usb/gadget/pxa27x_udc.c
+ * Intel PXA2xx 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
+ * Copyright (C) 2004 Intel Corporation
+ * Copyright (C) 2005 SDG Systems, LLC (Aric Blumer)
+ *
+ * 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
+ *
+ */
+
+#undef DEBUG
+ // #define DEBUG 1
+ //#define VERBOSE DBG_VERBOSE
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/irq.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/mach-types.h>
+#include <asm/unaligned.h>
+#include <asm/hardware.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/pxa-regs.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb_gadget.h>
+
+#include <asm/arch/udc.h>
+
+
+/*
+ * This driver handles the USB Device Controller (UDC) in Intel's PXA 27777777x
+ * series processors.
+ * 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.
+ */
+
+#define DRIVER_VERSION "21-Jul-2005"
+#define DRIVER_DESC "PXA 27x USB Device Controller driver"
+
+
+static const char driver_name [] = "pxa27x_udc";
+
+static const char ep0name [] = "ep0";
+
+
+#define USE_DMA
+//#define DISABLE_TEST_MODE
+
+#ifdef CONFIG_PROC_FS
+#define UDC_PROC_FILE
+#endif
+
+#include "pxa27x_udc.h"
+
+#if 0
+#ifdef CONFIG_EMBEDDED
+/* few strings, and little code to use them */
+#undef DEBUG
+#undef UDC_PROC_FILE
+#endif
+#endif
+
+#ifdef USE_DMA
+static int use_dma = 1;
+module_param(use_dma, bool, 0);
+MODULE_PARM_DESC (use_dma, "true to use dma");
+
+static void dma_nodesc_handler (int dmach, void *_ep);
+static void kick_dma(struct pxa27x_ep *ep, struct pxa27x_request *req);
+
+#define DMASTR " (dma support)"
+
+#else /* !USE_DMA */
+#define DMASTR " (pio only)"
+#endif
+
+#ifdef CONFIG_USB_PXA27X_SMALL
+#define SIZE_STR " (small)"
+#else
+#define SIZE_STR ""
+#endif
+
+#ifdef DISABLE_TEST_MODE
+/* (mode == 0) == no undocumented chip tweaks
+ * (mode & 1) == double buffer bulk IN
+ * (mode & 2) == double buffer bulk OUT
+ * ... so mode = 3 (or 7, 15, etc) does it for both
+ */
+static ushort fifo_mode = 0;
+module_param(fifo_mode, ushort, 0);
+MODULE_PARM_DESC (fifo_mode, "pxa27x udc fifo mode");
+#endif
+
+#define UDCISR0_IR0 0x3
+#define UDCISR_INT_MASK (UDC_INT_FIFOERROR | UDC_INT_PACKETCMP)
+#define UDCICR_INT_MASK UDCISR_INT_MASK
+
+#define UDCCSR_MASK (UDCCSR_FST | UDCCSR_DME)
+/* ---------------------------------------------------------------------------
+ * endpoint related parts of the api to the usb controller hardware,
+ * used by gadget driver; and the inner talker-to-hardware core.
+ * ---------------------------------------------------------------------------
+ */
+
+static void pxa27x_ep_fifo_flush (struct usb_ep *ep);
+static void nuke (struct pxa27x_ep *, int status);
+
+static void pio_irq_enable(int ep_num)
+{
+ if (ep_num < 16)
+ UDCICR0 |= 3 << (ep_num * 2);
+ else {
+ ep_num -= 16;
+ UDCICR1 |= 3 << (ep_num * 2);
+ }
+}
+
+static void pio_irq_disable(int ep_num)
+{
+ ep_num &= 0xf;
+ if (ep_num < 16)
+ UDCICR0 &= ~(3 << (ep_num * 2));
+ else {
+ ep_num -= 16;
+ UDCICR1 &= ~(3 << (ep_num * 2));
+ }
+}
+
+/* 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_OEN | 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 pxa27x
+ * endpoint configurations are fixed, and are pretty much always enabled,
+ * there's not a lot to manage here.
+ *
+ * because pxa27x 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 pxa27x_ep_enable (struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct pxa27x_ep *ep;
+ struct pxa27x_udc *dev;
+
+ ep = container_of (_ep, struct pxa27x_ep, ep);
+ if (!_ep || !desc || _ep->name == ep0name
+ || desc->bDescriptorType != USB_DT_ENDPOINT
+ || ep->fifo_size < le16_to_cpu(desc->wMaxPacketSize)) {
+ DMSG("%s, bad ep or descriptor\n", __FUNCTION__);
+ return -EINVAL;
+ }
+
+ /* xfer types must match, except that interrupt ~= bulk */
+ if( ep->ep_type != USB_ENDPOINT_XFER_BULK
+ && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
+ DMSG("%s, %s type mismatch\n", __FUNCTION__, _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", __FUNCTION__, _ep->name);
+ return -ERANGE;
+ }
+
+ dev = ep->dev;
+ if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
+ DMSG("%s, bogus device state\n", __FUNCTION__);
+ return -ESHUTDOWN;
+ }
+
+ ep->desc = desc;
+ ep->dma = -1;
+ ep->stopped = 0;
+ ep->pio_irqs = ep->dma_irqs = 0;
+ ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize);
+
+ /* flush fifo (mostly for OUT buffers) */
+ pxa27x_ep_fifo_flush (_ep);
+
+ /* ... reset halt state too, if we could ... */
+
+#ifdef USE_DMA
+ /* for (some) bulk and ISO endpoints, try to get a DMA channel and
+ * bind it to the endpoint. otherwise use PIO.
+ */
+ DMSG("%s: called attributes=%d\n", __FUNCTION__, ep->ep_type);
+ switch (ep->ep_type) {
+ case USB_ENDPOINT_XFER_ISOC:
+ if (le16_to_cpu(desc->wMaxPacketSize) % 32)
+ break;
+ // fall through
+ case USB_ENDPOINT_XFER_BULK:
+ if (!use_dma || !ep->reg_drcmr)
+ break;
+ ep->dma = pxa_request_dma ((char *)_ep->name,
+ (le16_to_cpu (desc->wMaxPacketSize) > 64)
+ ? DMA_PRIO_MEDIUM /* some iso */
+ : DMA_PRIO_LOW,
+ dma_nodesc_handler, ep);
+ if (ep->dma >= 0) {
+ *ep->reg_drcmr = DRCMR_MAPVLD | ep->dma;
+ DMSG("%s using dma%d\n", _ep->name, ep->dma);
+ }
+ default:
+ break;
+ }
+#endif
+ DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
+ return 0;
+}
+
+static int pxa27x_ep_disable (struct usb_ep *_ep)
+{
+ struct pxa27x_ep *ep;
+
+ ep = container_of (_ep, struct pxa27x_ep, ep);
+ if (!_ep || !ep->desc) {
+ DMSG("%s, %s not enabled\n", __FUNCTION__,
+ _ep ? ep->ep.name : NULL);
+ return -EINVAL;
+ }
+ nuke (ep, -ESHUTDOWN);
+
+#ifdef USE_DMA
+ if (ep->dma >= 0) {
+ *ep->reg_drcmr = 0;
+ pxa_free_dma (ep->dma);
+ ep->dma = -1;
+ }
+#endif
+
+ /* flush fifo (mostly for IN buffers) */
+ pxa27x_ep_fifo_flush (_ep);
+
+ ep->desc = 0;
+ ep->stopped = 1;
+
+ DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* for the pxa27x, 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).
+ */
+
+/*
+ * pxa27x_ep_alloc_request - allocate a request data structure
+ */
+static struct usb_request *
+pxa27x_ep_alloc_request (struct usb_ep *_ep, unsigned gfp_flags)
+{
+ struct pxa27x_request *req;
+
+ req = kmalloc (sizeof *req, gfp_flags);
+ if (!req)
+ return 0;
+
+ memset (req, 0, sizeof *req);
+ INIT_LIST_HEAD (&req->queue);
+ return &req->req;
+}
+
+
+/*
+ * pxa27x_ep_free_request - deallocate a request data structure
+ */
+static void
+pxa27x_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct pxa27x_request *req;
+
+ req = container_of(_req, struct pxa27x_request, req);
+ WARN_ON (!list_empty (&req->queue));
+ kfree(req);
+}
+
+
+/* PXA cache needs flushing with DMA I/O (it's dma-incoherent), but there's
+ * no device-affinity and the heap works perfectly well for i/o buffers.
+ * It wastes much less memory than dma_alloc_coherent() would, and even
+ * prevents cacheline (32 bytes wide) sharing problems.
+ */
+static void *
+pxa27x_ep_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
+ dma_addr_t *dma, unsigned gfp_flags)
+{
+ char *retval;
+
+ retval = kmalloc (bytes, gfp_flags & ~(__GFP_DMA|__GFP_HIGHMEM));
+ if (retval)
+ *dma = virt_to_bus (retval);
+ return retval;
+}
+
+static void
+pxa27x_ep_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma,
+ unsigned bytes)
+{
+ kfree (buf);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * done - retire a request; caller blocked irqs
+ */
+static void done(struct pxa27x_ep *ep, struct pxa27x_request *req, int status)
+{
+ 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 */
+ req->req.complete(&ep->ep, &req->req);
+}
+
+
+static inline void ep0_idle (struct pxa27x_udc *dev)
+{
+ dev->ep0state = EP0_IDLE;
+ LED_EP0_OFF;
+}
+
+static int
+write_packet(volatile u32 *uddr, struct pxa27x_request *req, unsigned max)
+{
+ u32 *buf;
+ int length, count, remain;
+
+ buf = (u32*)(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;
+
+ remain = length & 0x3;
+ count = length & ~(0x3);
+
+ while (likely(count)) {
+ *uddr = *buf++;
+ count -= 4;
+ }
+
+ if (remain) {
+ volatile u8* reg=(u8*)uddr;
+ char *rd =(u8*)buf;
+
+ while (remain--) {
+ *reg=*rd++;
+ }
+ }
+
+ 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 pxa27x_ep *ep, struct pxa27x_request *req)
+{
+ unsigned max;
+
+ max = le16_to_cpu(ep->desc->wMaxPacketSize);
+ do {
+ int count;
+ int is_last, is_short;
+
+ count = write_packet(ep->reg_udcdr, 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);
+ }
+
+ DMSG("wrote %s count:%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->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_udccsr = UDCCSR_PC;
+ if (is_short)
+ *ep->reg_udccsr = UDCCSR_SP;
+
+ /* requests complete when all IN data is in the FIFO */
+ if (is_last) {
+ done (ep, req, 0);
+ if (list_empty(&ep->queue) || unlikely(ep->dma >= 0)) {
+ pio_irq_disable (ep->ep_num);
+#ifdef USE_DMA
+ /* unaligned data and zlps couldn't use dma */
+ if (unlikely(!list_empty(&ep->queue))) {
+ req = list_entry(ep->queue.next,
+ struct pxa27x_request, queue);
+ kick_dma(ep,req);
+ return 0;
+ }
+#endif
+ }
+ 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_udccsr & UDCCSR_FS);
+ 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 pxa27x_udc *dev, u32 flags, const char *tag)
+{
+ UDCCSR0 = flags|UDCCSR0_SA|UDCCSR0_OPC;
+ UDCISR0 = UDCICR_INT(0, UDC_INT_FIFOERROR | UDC_INT_PACKETCMP);
+ dev->req_pending = 0;
+ DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n",
+ __FUNCTION__, tag, UDCCSR0, flags);
+}
+
+static int
+write_ep0_fifo (struct pxa27x_ep *ep, struct pxa27x_request *req)
+{
+ unsigned count;
+ int is_short;
+
+ count = write_packet(&UDCDR0, 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->req);
+
+ if (unlikely (is_short)) {
+ if (ep->dev->req_pending)
+ ep0start(ep->dev, UDCCSR0_IPR, "short IN");
+ else
+ UDCCSR0 = UDCCSR0_IPR;
+
+ count = req->req.length;
+ done (ep, req, 0);
+ ep0_idle(ep->dev);
+#if 0
+ /* 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 ((UDCCSR0 & UDCCSR0_OPC) != 0) {
+ /* clear OPC, generate ack */
+ UDCCSR0 = UDCCSR0_OPC;
+ break;
+ }
+ count--;
+ udelay(1);
+ } while (count);
+ }
+#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 pxa27x_ep *ep, struct pxa27x_request *req)
+{
+ for (;;) {
+ u32 *buf;
+ int bufferspace, count, is_short;
+
+ /* make sure there's a packet in the FIFO.*/
+ if (unlikely ((*ep->reg_udccsr & UDCCSR_PC) == 0))
+ break;
+ buf =(u32*) (req->req.buf + req->req.actual);
+ prefetchw(buf);
+ bufferspace = req->req.length - req->req.actual;
+
+ /* read all bytes from this packet */
+ if (likely (*ep->reg_udccsr & UDCCSR_BNE)) {
+ count = 0x3ff & *ep->reg_udcbcr;
+ req->req.actual += min (count, bufferspace);
+ } else /* zlp */
+ count = 0;
+
+ is_short = (count < ep->ep.maxpacket);
+ DMSG("read %s udccsr:%02x, count:%d bytes%s req %p %d/%d\n",
+ ep->ep.name, *ep->reg_udccsr, count,
+ is_short ? "/S" : "",
+ &req->req, req->req.actual, req->req.length);
+
+// dump_regs(ep->ep_num );
+ count = min(count, bufferspace);
+ while (likely (count > 0)) {
+ *buf++ = *ep->reg_udcdr;
+ count -= 4;
+ }
+ DMSG("Buf:0x%p\n", req->req.buf);
+
+ *ep->reg_udccsr = UDCCSR_PC;
+ /* RPC/RSP/RNE could now reflect the other packet buffer */
+
+ /* completion */
+ if (is_short || req->req.actual == req->req.length) {
+ done (ep, req, 0);
+ if (list_empty(&ep->queue))
+ pio_irq_disable (ep->ep_num);
+ 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 pxa27x_ep *ep, struct pxa27x_request *req)
+{
+ u32 *buf, word;
+ unsigned bufferspace;
+
+ buf = (u32*) (req->req.buf + req->req.actual);
+ bufferspace = req->req.length - req->req.actual;
+
+ while (UDCCSR0 & UDCCSR0_RNE) {
+ word = UDCDR0;
+
+ 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++ = word;
+ req->req.actual += 4;
+ bufferspace -= 4;
+ }
+ }
+
+ UDCCSR0 = UDCCSR0_OPC ;
+
+ /* completion */
+ if (req->req.actual >= req->req.length)
+ return 1;
+
+ /* finished that packet. the next one may be waiting... */
+ return 0;
+}
+
+#ifdef USE_DMA
+
+#define MAX_IN_DMA ((DCMD_LENGTH + 1) - BULK_FIFO_SIZE)
+static void kick_dma(struct pxa27x_ep *ep, struct pxa27x_request *req)
+{
+ u32 dcmd = 0;
+ u32 len = req->req.length;
+ u32 buf = req->req.dma;
+ u32 fifo = io_v2p ((u32)ep->reg_udcdr);
+
+ buf += req->req.actual;
+ len -= req->req.actual;
+ ep->dma_con = 0;
+
+ DMSG("%s: req:0x%p length:%d, actual:%d dma:%d\n",
+ __FUNCTION__, &req->req, req->req.length,
+ req->req.actual,ep->dma);
+
+ /* no-descriptor mode can be simple for bulk-in, iso-in, iso-out */
+ DCSR(ep->dma) = DCSR_NODESC;
+ if (buf & 0x3)
+ DALGN |= 1 << ep->dma;
+ else
+ DALGN &= ~(1 << ep->dma);
+
+ if (ep->dir_in) {
+ DSADR(ep->dma) = buf;
+ DTADR(ep->dma) = fifo;
+ if (len > MAX_IN_DMA) {
+ len= MAX_IN_DMA;
+ ep->dma_con =1 ;
+ } else if (len >= ep->ep.maxpacket) {
+ if ((ep->dma_con = (len % ep->ep.maxpacket) != 0))
+ len = ep->ep.maxpacket;
+ }
+ dcmd = len | DCMD_BURST32 | DCMD_WIDTH4 | DCMD_ENDIRQEN
+ | DCMD_FLOWTRG | DCMD_INCSRCADDR;
+ } else {
+ DSADR(ep->dma) = fifo;
+ DTADR(ep->dma) = buf;
+ dcmd = len | DCMD_BURST32 | DCMD_WIDTH4 | DCMD_ENDIRQEN
+ | DCMD_FLOWSRC | DCMD_INCTRGADDR;
+ }
+ *ep->reg_udccsr = UDCCSR_DME;
+ DCMD(ep->dma) = dcmd;
+ DCSR(ep->dma) = DCSR_NODESC | DCSR_EORIRQEN \
+ | ((ep->dir_in) ? DCSR_STOPIRQEN : 0);
+ *ep->reg_drcmr = ep->dma | DRCMR_MAPVLD;
+ DCSR(ep->dma) |= DCSR_RUN;
+}
+
+static void cancel_dma(struct pxa27x_ep *ep)
+{
+ struct pxa27x_request *req;
+ u32 tmp;
+
+ if (DCSR(ep->dma) == 0 || list_empty(&ep->queue))
+ return;
+
+ DMSG("hehe dma:%d,dcsr:0x%x\n", ep->dma, DCSR(ep->dma));
+ DCSR(ep->dma) = 0;
+ while ((DCSR(ep->dma) & DCSR_STOPSTATE) == 0)
+ cpu_relax();
+
+ req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+ tmp = DCMD(ep->dma) & DCMD_LENGTH;
+ req->req.actual = req->req.length - tmp;
+
+ /* the last tx packet may be incomplete, so flush the fifo.
+ * FIXME correct req.actual if we can
+ */
+ *ep->reg_udccsr = UDCCSR_FEF;
+}
+
+static void dma_nodesc_handler(int dmach, void *_ep)
+{
+ struct pxa27x_ep *ep = _ep;
+ struct pxa27x_request *req, *req_next;
+ u32 dcsr, tmp, completed;
+
+ local_irq_disable();
+
+ req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+
+ DMSG("%s, buf:0x%p\n",__FUNCTION__, req->req.buf);
+
+ ep->dma_irqs++;
+ ep->dev->stats.irqs++;
+ HEX_DISPLAY(ep->dev->stats.irqs);
+
+ completed = 0;
+
+ dcsr = DCSR(dmach);
+ DCSR(ep->dma) &= ~DCSR_RUN;
+
+ if (dcsr & DCSR_BUSERR) {
+ DCSR(dmach) = DCSR_BUSERR;
+ printk(KERN_ERR " Buss Error\n");
+ req->req.status = -EIO;
+ completed = 1;
+ } else if (dcsr & DCSR_ENDINTR) {
+ DCSR(dmach) = DCSR_ENDINTR;
+ if (ep->dir_in) {
+ tmp = req->req.length - req->req.actual;
+ /* Last packet is a short one*/
+ if ( tmp < ep->ep.maxpacket) {
+ int count = 0;
+
+ *ep->reg_udccsr = UDCCSR_SP | \
+ (*ep->reg_udccsr & UDCCSR_MASK);
+ /*Wait for packet out */
+ while( (count++ < 10000) && \
+ !(*ep->reg_udccsr & UDCCSR_FS));
+ if (count >= 10000)
+ DMSG("Failed to send packet\n");
+ else
+ DMSG("%s: short packet sent len:%d,"
+ "length:%d,actual:%d\n", __FUNCTION__,
+ tmp, req->req.length, req->req.actual);
+ req->req.actual = req->req.length;
+ completed = 1;
+ /* There are still packets to transfer */
+ } else if ( ep->dma_con) {
+ DMSG("%s: more packets,length:%d,actual:%d\n",
+ __FUNCTION__,req->req.length,
+ req->req.actual);
+ req->req.actual += ep->ep.maxpacket;
+ completed = 0;
+ } else {
+ DMSG("%s: no more packets,length:%d,"
+ "actual:%d\n", __FUNCTION__,
+ req->req.length, req->req.actual);
+ req->req.actual = req->req.length;
+ completed = 1;
+ }
+ } else {
+ req->req.actual = req->req.length;
+ completed = 1;
+ }
+ } else if (dcsr & DCSR_EORINTR) { //Only happened in OUT DMA
+ int remain,udccsr ;
+
+ DCSR(dmach) = DCSR_EORINTR;
+ remain = DCMD(dmach) & DCMD_LENGTH;
+ req->req.actual = req->req.length - remain;
+
+ udccsr = *ep->reg_udccsr;
+ if (udccsr & UDCCSR_SP) {
+ *ep->reg_udccsr = UDCCSR_PC | (udccsr & UDCCSR_MASK);
+ completed = 1;
+ }
+ DMSG("%s: length:%d actual:%d\n",
+ __FUNCTION__, req->req.length, req->req.actual);
+ } else
+ DMSG("%s: Others dma:%d DCSR:0x%x DCMD:0x%x\n",
+ __FUNCTION__, dmach, DCSR(dmach), DCMD(dmach));
+
+ if (likely(completed)) {
+ if (req->queue.next != &ep->queue) {
+ req_next = list_entry(req->queue.next,
+ struct pxa27x_request, queue);
+ kick_dma(ep, req_next);
+ }
+ done(ep, req, 0);
+ } else {
+ kick_dma(ep, req);
+ }
+
+ local_irq_enable();
+}
+
+#endif
+/*-------------------------------------------------------------------------*/
+
+static int
+pxa27x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, unsigned gfp_flags)
+{
+ struct pxa27x_ep *ep;
+ struct pxa27x_request *req;
+ struct pxa27x_udc *dev;
+ unsigned long flags;
+
+ req = container_of(_req, struct pxa27x_request, req);
+ if (unlikely (!_req || !_req->complete || !_req->buf||
+ !list_empty(&req->queue))) {
+ DMSG("%s, bad params\n", __FUNCTION__);
+ return -EINVAL;
+ }
+
+ ep = container_of(_ep, struct pxa27x_ep, ep);
+ if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+ DMSG("%s, bad ep\n", __FUNCTION__);
+ return -EINVAL;
+ }
+
+ DMSG("%s, ep point %d is queue\n", __FUNCTION__, ep->ep_num);
+
+ dev = ep->dev;
+ if (unlikely (!dev->driver
+ || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
+ DMSG("%s, bogus device state\n", __FUNCTION__);
+ 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->ep_type == USB_ENDPOINT_XFER_ISOC
+ && req->req.length > le16_to_cpu
+ (ep->desc->wMaxPacketSize)))
+ return -EMSGSIZE;
+
+#ifdef USE_DMA
+ // FIXME caller may already have done the dma mapping
+ if (ep->dma >= 0) {
+ _req->dma = dma_map_single(dev->dev, _req->buf, _req->length,
+ (ep->dir_in) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ }
+#endif
+
+ 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 == 0 /* ep0 */) {
+ unsigned length = _req->length;
+
+ switch (dev->ep0state) {
+ case EP0_IN_DATA_PHASE:
+ dev->stats.write.ops++;
+ if (write_ep0_fifo(ep, req))
+ req = 0;
+ break;
+
+ case EP0_OUT_DATA_PHASE:
+ dev->stats.read.ops++;
+ if (dev->req_pending)
+ ep0start(dev, UDCCSR0_IPR, "OUT");
+ if (length == 0 || ((UDCCSR0 & UDCCSR0_RNE) != 0
+ && read_ep0_fifo(ep, req))) {
+ ep0_idle(dev);
+ done(ep, req, 0);
+ req = 0;
+ }
+ break;
+ case EP0_NO_ACTION:
+ ep0_idle(dev);
+ req=0;
+ break;
+ default:
+ DMSG("ep0 i/o, odd state %d\n", dev->ep0state);
+ local_irq_restore (flags);
+ return -EL2HLT;
+ }
+#ifdef USE_DMA
+ /* either start dma or prime pio pump */
+ } else if (ep->dma >= 0) {
+ kick_dma(ep, req);
+#endif
+ /* can the FIFO can satisfy the request immediately? */
+ } else if (ep->dir_in
+ && (*ep->reg_udccsr & UDCCSR_FS) != 0
+ && write_fifo(ep, req)) {
+ req = 0;
+ } else if ((*ep->reg_udccsr & UDCCSR_FS) != 0
+ && read_fifo(ep, req)) {
+ req = 0;
+ }
+ DMSG("req:%p,ep->desc:%p,ep->dma:%d\n", req, ep->desc, ep->dma);
+ if (likely (req && ep->desc) && ep->dma < 0)
+ pio_irq_enable(ep->ep_num);
+ }
+
+ /* pio or dma irq handler advances the queue. */
+ if (likely (req != 0))
+ list_add_tail(&req->queue, &ep->queue);
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+
+/*
+ * nuke - dequeue ALL requests
+ */
+static void nuke(struct pxa27x_ep *ep, int status)
+{
+ struct pxa27x_request *req;
+
+ /* called with irqs blocked */
+#ifdef USE_DMA
+ if (ep->dma >= 0 && !ep->stopped)
+ cancel_dma(ep);
+#endif
+ while (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+ done(ep, req, status);
+ }
+ if (ep->desc)
+ pio_irq_disable (ep->ep_num);
+}
+
+
+/* dequeue JUST ONE request */
+static int pxa27x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct pxa27x_ep *ep;
+ struct pxa27x_request *req;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct pxa27x_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;
+ }
+
+#ifdef USE_DMA
+ if (ep->dma >= 0 && ep->queue.next == &req->queue && !ep->stopped) {
+ cancel_dma(ep);
+ done(ep, req, -ECONNRESET);
+ /* restart i/o */
+ if (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next,
+ struct pxa27x_request, queue);
+ kick_dma(ep, req);
+ }
+ } else
+#endif
+ done(ep, req, -ECONNRESET);
+
+ local_irq_restore(flags);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int pxa27x_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ struct pxa27x_ep *ep;
+ unsigned long flags;
+
+ DMSG("%s is called\n", __FUNCTION__);
+ ep = container_of(_ep, struct pxa27x_ep, ep);
+ if (unlikely (!_ep
+ || (!ep->desc && ep->ep.name != ep0name))
+ || ep->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ DMSG("%s, bad ep\n", __FUNCTION__);
+ 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->dir_in && ((*ep->reg_udccsr & UDCCSR_FS) == 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_udccsr = UDCCSR_FST|UDCCSR_FEF;
+
+ /* ep0 needs special care */
+ if (!ep->desc) {
+ start_watchdog(ep->dev);
+ ep->dev->req_pending = 0;
+ ep->dev->ep0state = EP0_STALL;
+ LED_EP0_OFF;
+
+ /* and bulk/intr endpoints like dropping stalls too */
+ } else {
+ unsigned i;
+ for (i = 0; i < 1000; i += 20) {
+ if (*ep->reg_udccsr & UDCCSR_SST)
+ break;
+ udelay(20);
+ }
+ }
+ local_irq_restore(flags);
+
+ DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
+ return 0;
+}
+
+static int pxa27x_ep_fifo_status(struct usb_ep *_ep)
+{
+ struct pxa27x_ep *ep;
+
+ ep = container_of(_ep, struct pxa27x_ep, ep);
+ if (!_ep) {
+ DMSG("%s, bad ep\n", __FUNCTION__);
+ return -ENODEV;
+ }
+ /* pxa can't report unclaimed bytes from IN fifos */
+ if (ep->dir_in)
+ return -EOPNOTSUPP;
+ if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN
+ || (*ep->reg_udccsr & UDCCSR_FS) == 0)
+ return 0;
+ else
+ return (*ep->reg_udcbcr & 0xfff) + 1;
+}
+
+static void pxa27x_ep_fifo_flush(struct usb_ep *_ep)
+{
+ struct pxa27x_ep *ep;
+
+ ep = container_of(_ep, struct pxa27x_ep, ep);
+ if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) {
+ DMSG("%s, bad ep\n", __FUNCTION__);
+ return;
+ }
+
+ /* toggle and halt bits stay unchanged */
+
+ /* for OUT, just read and discard the FIFO contents. */
+ if (!ep->dir_in) {
+ while (((*ep->reg_udccsr) & UDCCSR_BNE) != 0)
+ (void) *ep->reg_udcdr;
+ return;
+ }
+
+ /* most IN status is the same, but ISO can't stall */
+ *ep->reg_udccsr = UDCCSR_PC|UDCCSR_FST|UDCCSR_TRN
+ | (ep->ep_type == USB_ENDPOINT_XFER_ISOC)
+ ? 0 : UDCCSR_SST;
+}
+
+
+static struct usb_ep_ops pxa27x_ep_ops = {
+ .enable = pxa27x_ep_enable,
+ .disable = pxa27x_ep_disable,
+
+ .alloc_request = pxa27x_ep_alloc_request,
+ .free_request = pxa27x_ep_free_request,
+
+ .alloc_buffer = pxa27x_ep_alloc_buffer,
+ .free_buffer = pxa27x_ep_free_buffer,
+
+ .queue = pxa27x_ep_queue,
+ .dequeue = pxa27x_ep_dequeue,
+
+ .set_halt = pxa27x_ep_set_halt,
+ .fifo_status = pxa27x_ep_fifo_status,
+ .fifo_flush = pxa27x_ep_fifo_flush,
+};
+
+
+/* ---------------------------------------------------------------------------
+ * device-scoped parts of the api to the usb controller hardware
+ * ---------------------------------------------------------------------------
+ */
+
+static int pxa27x_udc_get_frame(struct usb_gadget *_gadget)
+{
+ return (UDCFNR & 0x3FF);
+}
+
+static int pxa27x_udc_wakeup(struct usb_gadget *_gadget)
+{
+ /* host may not have enabled remote wakeup */
+ if ((UDCCR & UDCCR_DWRE) == 0)
+ return -EHOSTUNREACH;
+ udc_set_mask_UDCCR(UDCCR_UDR);
+ return 0;
+}
+
+static const struct usb_gadget_ops pxa27x_udc_ops = {
+ .get_frame = pxa27x_udc_get_frame,
+ .wakeup = pxa27x_udc_wakeup,
+ // current versions must always be self-powered
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef UDC_PROC_FILE
+
+static const char proc_node_name [] = "driver/udc";
+
+static int
+udc_proc_read(char *page, char **start, off_t off, int count,
+ int *eof, void *_dev)
+{
+ char *buf = page;
+ struct pxa27x_udc *dev = _dev;
+ char *next = buf;
+ unsigned size = count;
+ unsigned long flags;
+ int i, t;
+ u32 tmp;
+
+ if (off != 0)
+ return 0;
+
+ local_irq_save(flags);
+
+ /* basic device status */
+ t = scnprintf(next, size, DRIVER_DESC "\n"
+ "%s version: %s\nGadget driver: %s\n",
+ driver_name, DRIVER_VERSION SIZE_STR DMASTR,
+ dev->driver ? dev->driver->driver.name : "(none)");
+ size -= t;
+ next += t;
+
+ /* registers for device and ep0 */
+ t = scnprintf(next, size,
+ "uicr %02X.%02X, usir %02X.%02x, ufnr %02X\n",
+ UDCICR1, UDCICR0, UDCISR1, UDCISR0, UDCFNR);
+ size -= t;
+ next += t;
+
+ tmp = UDCCR;
+ t = scnprintf(next, size,"udccr %02X =%s%s%s%s%s%s%s%s%s%s, con=%d,inter=%d,altinter=%d\n", tmp,
+ (tmp & UDCCR_OEN) ? " oen":"",
+ (tmp & UDCCR_AALTHNP) ? " aalthnp":"",
+ (tmp & UDCCR_AHNP) ? " rem" : "",
+ (tmp & UDCCR_BHNP) ? " rstir" : "",
+ (tmp & UDCCR_DWRE) ? " dwre" : "",
+ (tmp & UDCCR_SMAC) ? " smac" : "",
+ (tmp & UDCCR_EMCE) ? " emce" : "",
+ (tmp & UDCCR_UDR) ? " udr" : "",
+ (tmp & UDCCR_UDA) ? " uda" : "",
+ (tmp & UDCCR_UDE) ? " ude" : "",
+ (tmp & UDCCR_ACN) >> UDCCR_ACN_S,
+ (tmp & UDCCR_AIN) >> UDCCR_AIN_S,
+ (tmp & UDCCR_AAISN)>> UDCCR_AAISN_S );
+
+ size -= t;
+ next += t;
+
+ tmp = UDCCSR0;
+ t = scnprintf(next, size,
+ "udccsr0 %02X =%s%s%s%s%s%s%s\n", tmp,
+ (tmp & UDCCSR0_SA) ? " sa" : "",
+ (tmp & UDCCSR0_RNE) ? " rne" : "",
+ (tmp & UDCCSR0_FST) ? " fst" : "",
+ (tmp & UDCCSR0_SST) ? " sst" : "",
+ (tmp & UDCCSR0_DME) ? " dme" : "",
+ (tmp & UDCCSR0_IPR) ? " ipr" : "",
+ (tmp & UDCCSR0_OPC) ? " opc" : "");
+ size -= t;
+ next += t;
+
+ if (!dev->driver)
+ goto done;
+
+ t = scnprintf(next, size, "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);
+ size -= t;
+ next += t;
+
+ /* dump endpoint queues */
+ for (i = 0; i < UDC_EP_NUM; i++) {
+ struct pxa27x_ep *ep = &dev->ep [i];
+ struct pxa27x_request *req;
+ int t;
+
+ if (i != 0) {
+ const struct usb_endpoint_descriptor *d;
+
+ d = ep->desc;
+ if (!d)
+ continue;
+ tmp = *dev->ep [i].reg_udccsr;
+ t = scnprintf(next, size,
+ "%s max %d %s udccs %02x udccr:0x%x\n",
+ ep->ep.name, le16_to_cpu (d->wMaxPacketSize),
+ (ep->dma >= 0) ? "dma" : "pio", tmp,
+ *dev->ep[i].reg_udccr);
+ /* TODO translate all five groups of udccs bits! */
+
+ } else /* ep0 should only have one transfer queued */
+ t = scnprintf(next, size, "ep0 max 16 pio irqs %lu\n",
+ ep->pio_irqs);
+ if (t <= 0 || t > size)
+ goto done;
+ size -= t;
+ next += t;
+
+ if (list_empty(&ep->queue)) {
+ t = scnprintf(next, size, "\t(nothing queued)\n");
+ if (t <= 0 || t > size)
+ goto done;
+ size -= t;
+ next += t;
+ continue;
+ }
+ list_for_each_entry(req, &ep->queue, queue) {
+#ifdef USE_DMA
+ if (ep->dma >= 0 && req->queue.prev == &ep->queue)
+ t = scnprintf(next, size,
+ "\treq %p len %d/%d "
+ "buf %p (dma%d dcmd %08x)\n",
+ &req->req, req->req.actual,
+ req->req.length, req->req.buf,
+ ep->dma, DCMD(ep->dma)
+ // low 13 bits == bytes-to-go
+ );
+ else
+#endif
+ t = scnprintf(next, size,
+ "\treq %p len %d/%d buf %p\n",
+ &req->req, req->req.actual,
+ req->req.length, req->req.buf);
+ if (t <= 0 || t > size)
+ goto done;
+ size -= t;
+ next += t;
+ }
+ }
+
+done:
+ local_irq_restore(flags);
+ *eof = 1;
+ return count - size;
+}
+
+#define create_proc_files() \
+ create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
+#define remove_proc_files() \
+ remove_proc_entry(proc_node_name, NULL)
+
+#else /* !UDC_PROC_FILE */
+#define create_proc_files() do {} while (0)
+#define remove_proc_files() do {} while (0)
+
+#endif /* UDC_PROC_FILE */
+
+/* "function" sysfs attribute */
+static ssize_t
+show_function (struct device *_dev, struct device_attribute *attr, char *buf)
+{
+ struct pxa27x_udc *dev = dev_get_drvdata (_dev);
+
+ if (!dev->driver
+ || !dev->driver->function
+ || strlen (dev->driver->function) > PAGE_SIZE)
+ return 0;
+ return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function);
+}
+static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * udc_disable - disable USB device controller
+ */
+static void udc_disable(struct pxa27x_udc *dev)
+{
+ UDCICR0 = UDCICR1 = 0x00000000;
+
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ /* Disable clock for USB device */
+ pxa_set_cken(CKEN11_USB, 0);
+
+ ep0_idle (dev);
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+ LED_CONNECTED_OFF;
+ if (dev->mach->udc_command)
+ dev->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+}
+
+
+/*
+ * udc_reinit - initialize software state
+ */
+static void udc_reinit(struct pxa27x_udc *dev)
+{
+ u32 i;
+
+ dev->ep0state = EP0_IDLE;
+
+ /* basic endpoint records init */
+ for (i = 0; i < UDC_EP_NUM; i++) {
+ struct pxa27x_ep *ep = &dev->ep[i];
+
+ ep->stopped = 0;
+ ep->pio_irqs = ep->dma_irqs = 0;
+ }
+ dev->configuration = 0;
+ dev->interface = 0;
+ dev->alternate = 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 pxa27x_udc *dev)
+{
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ // MST_MSCWR2 &= ~(MST_MSCWR2_nUSBC_SC);
+
+ /* Enable clock for USB device */
+ pxa_set_cken(CKEN11_USB, 1);
+
+ UDCICR0 = UDCICR1 = 0;
+
+ ep0_idle(dev);
+ dev->gadget.speed = USB_SPEED_FULL;
+ dev->stats.irqs = 0;
+
+ udc_set_mask_UDCCR(UDCCR_UDE);
+ udelay (2);
+ if (UDCCR & UDCCR_EMCE)
+ {
+ printk(KERN_ERR ": There are error in configuration, udc disabled\n");
+ }
+
+ /* caller must be able to sleep in order to cope
+ * with startup transients.
+ */
+ msleep(100);
+
+ /* enable suspend/resume and reset irqs */
+ UDCICR1 = UDCICR1_IECC | UDCICR1_IERU | UDCICR1_IESU | UDCICR1_IERS;
+
+ /* enable ep0 irqs */
+ UDCICR0 = UDCICR_INT(0,UDCICR_INT_MASK);
+#if 0
+ for(i=1; i < UDC_EP_NUM; i++) {
+ if (dev->ep[i].assigned)
+ pio_irq_enable(i);
+ }
+#endif
+ if (dev->mach->udc_command)
+ dev->mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+}
+
+
+/* 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 pxa27x_udc *dev = the_controller;
+ int retval;
+#if 0
+ DMSG("dev=0x%x, driver=0x%x, speed=%d,"
+ "bind=0x%x, unbind=0x%x, disconnect=0x%x, setup=0x%x\n",
+ (unsigned)dev, (unsigned)driver, driver->speed,
+ (unsigned)driver->bind, (unsigned)driver->unbind,
+ (unsigned)driver->disconnect, (unsigned)driver->setup);
+#endif
+ if (!driver || driver->speed != USB_SPEED_FULL
+ || !driver->bind
+ || !driver->unbind
+ || !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;
+
+ device_add (&dev->gadget.dev);
+ retval = driver->bind(&dev->gadget);
+ if (retval) {
+ DMSG("bind to driver %s --> error %d\n",
+ driver->driver.name, retval);
+ device_del (&dev->gadget.dev);
+
+ dev->driver = 0;
+ dev->gadget.dev.driver = 0;
+ return retval;
+ }
+ device_create_file(dev->dev, &dev_attr_function);
+
+ /* ... then enable host detection and ep0; and we're ready
+ * for set_configuration as well as eventual disconnect.
+ * NOTE: this shouldn't power up until later.
+ */
+ DMSG("registered gadget driver '%s'\n", driver->driver.name);
+ udc_enable(dev);
+ dump_state(dev);
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+static void
+stop_activity(struct pxa27x_udc *dev, struct usb_gadget_driver *driver)
+{
+ int i;
+
+ DMSG("Trace path 1\n");
+ /* don't disconnect drivers more than once */
+ if (dev->gadget.speed == USB_SPEED_UNKNOWN)
+ driver = 0;
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+
+ /* prevent new request submissions, kill any outstanding requests */
+ for (i = 0; i < UDC_EP_NUM; i++) {
+ struct pxa27x_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 pxa27x_udc *dev = the_controller;
+
+ if (!dev)
+ return -ENODEV;
+ if (!driver || driver != dev->driver)
+ return -EINVAL;
+
+ local_irq_disable();
+ udc_disable(dev);
+ stop_activity(dev, driver);
+ local_irq_enable();
+
+ driver->unbind(&dev->gadget);
+ dev->driver = 0;
+
+ device_del (&dev->gadget.dev);
+ device_remove_file(dev->dev, &dev_attr_function);
+
+ DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
+ dump_state(dev);
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+#ifndef enable_disconnect_irq
+#define enable_disconnect_irq() do {} while (0)
+#define disable_disconnect_irq() do {} while (0)
+#endif
+
+
+/*-------------------------------------------------------------------------*/
+
+static inline void clear_ep_state (struct pxa27x_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 < UDC_EP_NUM; i++)
+ nuke(&dev->ep[i], -ECONNABORTED);
+}
+
+static void udc_watchdog(unsigned long _dev)
+{
+ struct pxa27x_udc *dev = (void *)_dev;
+
+ local_irq_disable();
+ if (dev->ep0state == EP0_STALL
+ && (UDCCSR0 & UDCCSR0_FST) == 0
+ && (UDCCSR0 & UDCCSR0_SST) == 0) {
+ UDCCSR0 = UDCCSR0_FST|UDCCSR0_FTF;
+ DBG(DBG_VERBOSE, "ep0 re-stall\n");
+ start_watchdog(dev);
+ }
+ local_irq_enable();
+}
+
+static void handle_ep0 (struct pxa27x_udc *dev)
+{
+ u32 udccsr0 = UDCCSR0;
+ struct pxa27x_ep *ep = &dev->ep [0];
+ struct pxa27x_request *req;
+ union {
+ struct usb_ctrlrequest r;
+ u8 raw [8];
+ u32 word [2];
+ } u;
+
+ if (list_empty(&ep->queue))
+ req = 0;
+ else
+ req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+
+ /* clear stall status */
+ if (udccsr0 & UDCCSR0_SST) {
+ nuke(ep, -EPIPE);
+ UDCCSR0 = UDCCSR0_SST;
+ del_timer(&dev->timer);
+ ep0_idle(dev);
+ }
+
+ /* previous request unfinished? non-error iff back-to-back ... */
+ if ((udccsr0 & UDCCSR0_SA) != 0 && dev->ep0state != EP0_IDLE) {
+ nuke(ep, 0);
+ del_timer(&dev->timer);
+ ep0_idle(dev);
+ }
+
+ switch (dev->ep0state) {
+ case EP0_NO_ACTION:
+ printk(KERN_INFO"%s: Busy\n", __FUNCTION__);
+ /*Fall through */
+ case EP0_IDLE:
+ /* late-breaking status? */
+ udccsr0 = UDCCSR0;
+
+ /* start control request? */
+ if (likely((udccsr0 & (UDCCSR0_OPC|UDCCSR0_SA|UDCCSR0_RNE))
+ == (UDCCSR0_OPC|UDCCSR0_SA|UDCCSR0_RNE))) {
+ int i;
+
+ nuke (ep, -EPROTO);
+ /* read SETUP packet */
+ for (i = 0; i < 2; i++) {
+ if (unlikely(!(UDCCSR0 & UDCCSR0_RNE))) {
+bad_setup:
+ DMSG("SETUP %d!\n", i);
+ goto stall;
+ }
+ u.word [i] = UDCDR0;
+ }
+ if (unlikely((UDCCSR0 & UDCCSR0_RNE) != 0))
+ goto bad_setup;
+
+ le16_to_cpus (&u.r.wValue);
+ le16_to_cpus (&u.r.wIndex);
+ le16_to_cpus (&u.r.wLength);
+
+ LED_EP0_ON;
+
+ DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n",
+ u.r.bRequestType, u.r.bRequest,
+ u.r.wValue, u.r.wIndex, 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;
+#if 0
+ switch (u.r.bRequest) {
+ /* hardware was supposed to hide this */
+ case USB_REQ_SET_CONFIGURATION:
+ case USB_REQ_SET_INTERFACE:
+ case USB_REQ_SET_ADDRESS:
+ printk(KERN_ERR "Should not come here\n");
+ break;
+ }
+
+#endif
+ 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", UDCCSR0, i);
+stall:
+ /* the watchdog timer helps deal with cases
+ * where udc seems to clear FST wrongly, and
+ * then NAKs instead of STALLing.
+ */
+ ep0start(dev, UDCCSR0_FST|UDCCSR0_FTF, "stall");
+ start_watchdog(dev);
+ dev->ep0state = EP0_STALL;
+ LED_EP0_OFF;
+
+ /* 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, UDCCSR0_IPR, "defer/IPR");
+ }
+
+ /* expect at least one data or status stage irq */
+ return;
+
+ } else {
+ /* some random early IRQ:
+ * - we acked FST
+ * - IPR cleared
+ * - OPC got set, without SA (likely status stage)
+ */
+ UDCCSR0 = udccsr0 & (UDCCSR0_SA|UDCCSR0_OPC);
+ }
+ break;
+ case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
+ if (udccsr0 & UDCCSR0_OPC) {
+ UDCCSR0 = UDCCSR0_OPC|UDCCSR0_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 (udccsr0 & UDCCSR0_OPC) {
+ 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_STALL:
+ UDCCSR0 = UDCCSR0_FST;
+ break;
+ }
+ UDCISR0 = UDCISR_INT(0, UDCISR_INT_MASK);
+}
+
+
+static void handle_ep(struct pxa27x_ep *ep)
+{
+ struct pxa27x_request *req;
+ int completed;
+ u32 udccsr=0;
+
+ DMSG("%s is called\n", __FUNCTION__);
+ do {
+ completed = 0;
+ if (likely (!list_empty(&ep->queue))) {
+ req = list_entry(ep->queue.next,
+ struct pxa27x_request, queue);
+ } else
+ req = 0;
+
+// udccsr = *ep->reg_udccsr;
+ DMSG("%s: req:%p, udcisr0:0x%x udccsr %p:0x%x\n", __FUNCTION__,
+ req, UDCISR0, ep->reg_udccsr, *ep->reg_udccsr);
+ if (unlikely(ep->dir_in)) {
+ udccsr = (UDCCSR_SST | UDCCSR_TRN) & *ep->reg_udccsr;
+ if (unlikely (udccsr))
+ *ep->reg_udccsr = udccsr;
+
+ if (req && likely ((*ep->reg_udccsr & UDCCSR_FS) != 0))
+ completed = write_fifo(ep, req);
+
+ } else {
+ udccsr = (UDCCSR_SST | UDCCSR_TRN) & *ep->reg_udccsr;
+ if (unlikely(udccsr))
+ *ep->reg_udccsr = udccsr;
+
+ /* fifos can hold packets, ready for reading... */
+ if (likely(req)) {
+ completed = read_fifo(ep, req);
+ } else {
+ pio_irq_disable (ep->ep_num);
+ *ep->reg_udccsr = UDCCSR_FEF;
+ DMSG("%s: no req for out data\n",
+ __FUNCTION__);
+ }
+ }
+ ep->pio_irqs++;
+ } while (completed);
+}
+
+static void pxa27x_change_configuration (struct pxa27x_udc *dev)
+{
+ struct usb_ctrlrequest req ;
+
+ req.bRequestType = 0;
+ req.bRequest = USB_REQ_SET_CONFIGURATION;
+ req.wValue = dev->configuration;
+ req.wIndex = 0;
+ req.wLength = 0;
+
+ dev->ep0state = EP0_NO_ACTION;
+ dev->driver->setup(&dev->gadget, &req);
+
+}
+
+static void pxa27x_change_interface (struct pxa27x_udc *dev)
+{
+ struct usb_ctrlrequest req;
+
+ req.bRequestType = USB_RECIP_INTERFACE;
+ req.bRequest = USB_REQ_SET_INTERFACE;
+ req.wValue = dev->alternate;
+ req.wIndex = dev->interface;
+ req.wLength = 0;
+
+ dev->ep0state = EP0_NO_ACTION;
+ dev->driver->setup(&dev->gadget, &req);
+}
+
+/*
+ * pxa27x_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
+pxa27x_udc_irq(int irq, void *_dev)
+{
+ struct pxa27x_udc *dev = _dev;
+ int handled;
+
+ dev->stats.irqs++;
+ HEX_DISPLAY(dev->stats.irqs);
+
+// printk("\n");
+ DBG(DBG_VERBOSE, "Interrupt, UDCISR0:0x%08x, UDCISR1:0x%08x, "
+ "UDCCR:0x%08x\n", UDCISR0, UDCISR1, UDCCR);
+ do {
+ u32 udcir = UDCISR1 & 0xF8000000;
+
+ handled = 0;
+
+ /* SUSpend Interrupt Request */
+ if (unlikely(udcir & UDCISR1_IRSU)) {
+ UDCISR1 = UDCISR1_IRSU;
+ handled = 1;
+ DBG(DBG_VERBOSE, "USB suspend\n");
+ 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(udcir & UDCISR1_IRRU)) {
+ UDCISR1 = UDCISR1_IRRU;
+ handled = 1;
+ DBG(DBG_VERBOSE, "USB resume\n");
+
+ if (dev->gadget.speed != USB_SPEED_UNKNOWN
+ && dev->driver
+ && dev->driver->resume)
+ dev->driver->resume(&dev->gadget);
+ }
+
+ if (unlikely(udcir & UDCISR1_IRCC)) {
+ unsigned config, interface, alternate;
+
+ handled = 1;
+ DBG(DBG_VERBOSE, "USB SET_CONFIGURATION or "
+ "SET_INTERFACE command received\n");
+
+ UDCCR |= UDCCR_SMAC;
+
+ config = (UDCCR & UDCCR_ACN) >> UDCCR_ACN_S;
+
+ if (dev->configuration != config) {
+ dev->configuration = config;
+ pxa27x_change_configuration(dev) ;
+ }
+
+ interface = (UDCCR & UDCCR_AIN) >> UDCCR_AIN_S;
+ alternate = (UDCCR & UDCCR_AAISN) >> UDCCR_AAISN_S;
+
+ if ( (dev->configuration != interface) || \
+ (dev->alternate != alternate)){
+ dev->interface = config;
+ dev->alternate = alternate;
+ pxa27x_change_interface(dev);
+ }
+
+ UDCISR1 = UDCISR1_IRCC;
+ DMSG("%s: con:%d,inter:%d,alt:%d\n",
+ __FUNCTION__, config,interface, alternate);
+ }
+
+ /* ReSeT Interrupt Request - USB reset */
+ if (unlikely(udcir & UDCISR1_IRRS)) {
+ UDCISR1 = UDCISR1_IRRS;
+ 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);
+
+ }
+ INFO("USB reset\n");
+ dev->gadget.speed = USB_SPEED_FULL;
+ memset(&dev->stats, 0, sizeof dev->stats);
+
+ } else {
+ u32 udcisr0 = UDCISR0 ;
+ u32 udcisr1 = UDCISR1 & 0xFFFF;
+ int i;
+
+ if (unlikely (!udcisr0 && !udcisr1))
+ continue;
+
+ DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", udcisr1,udcisr0);
+
+ /* control traffic */
+ if (udcisr0 & UDCISR0_IR0) {
+ dev->ep[0].pio_irqs++;
+ handle_ep0(dev);
+ handled = 1;
+ }
+
+ udcisr0 >>= 2;
+ /* endpoint data transfers */
+ for (i = 1; udcisr0!=0 && i < 16; udcisr0>>=2,i++) {
+ UDCISR0 = UDCISR_INT(i, UDCISR_INT_MASK);
+
+ if (udcisr0 & UDC_INT_FIFOERROR)
+ printk(KERN_ERR" Endpoint %d Fifo error\n", i);
+ if (udcisr0 & UDC_INT_PACKETCMP) {
+ handle_ep(&dev->ep[i]);
+ handled = 1;
+ }
+
+ }
+
+ for (i = 0; udcisr1!=0 && i < 8; udcisr1 >>= 2, i++) {
+ UDCISR1 = UDCISR_INT(i, UDCISR_INT_MASK);
+
+ if (udcisr1 & UDC_INT_FIFOERROR) {
+ printk(KERN_ERR" Endpoint %d fifo error\n", (i+16));
+ }
+
+ if (udcisr1 & UDC_INT_PACKETCMP) {
+ handle_ep(&dev->ep[i+16]);
+ handled = 1;
+ }
+ }
+ }
+
+ /* we could also ask for 1 msec SOF (SIR) interrupts */
+
+ } while (handled);
+ return IRQ_HANDLED;
+}
+
+static inline void validate_fifo_size(struct pxa27x_ep *pxa_ep, u8 bmAttributes)
+{
+ switch (bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ pxa_ep->fifo_size = EP0_FIFO_SIZE;
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ pxa_ep->fifo_size = ISO_FIFO_SIZE;
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ pxa_ep->fifo_size = BULK_FIFO_SIZE;
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ pxa_ep->fifo_size = INT_FIFO_SIZE;
+ break;
+ default:
+ break;
+ }
+}
+
+static void udc_init_ep(struct pxa27x_udc *dev)
+{
+ int i;
+
+ INIT_LIST_HEAD (&dev->gadget.ep_list);
+ INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
+
+ for (i = 0; i < UDC_EP_NUM; i++) {
+ struct pxa27x_ep *ep = &dev->ep[i];
+
+ ep->dma = -1;
+ if (i != 0) {
+ memset(ep, 0, sizeof(*ep));
+ }
+ INIT_LIST_HEAD (&ep->queue);
+ }
+}
+#define NAME_SIZE 18
+
+struct usb_ep* pxa27x_ep_config(
+ struct usb_gadget *gadget,
+ struct usb_endpoint_descriptor *desc,
+ int config, int interface, int alt
+)
+{
+ u32 tmp ;
+ unsigned i;
+ char* name;
+ struct usb_ep * ep = NULL;
+ struct pxa27x_ep *pxa_ep = NULL;
+ struct pxa27x_udc *dev = the_controller;
+
+ DMSG("pxa27x_config_ep is called\n");
+ DMSG(" usb endpoint descriptor is:\n"
+ " bLength:%d\n"
+ " bDescriptorType:%x\n"
+ " bEndpointAddress:%x\n"
+ " bmAttributes:%x\n"
+ " wMaxPacketSize:%d\n",
+ desc->bLength,
+ desc->bDescriptorType,desc->bEndpointAddress,
+ desc->bmAttributes,desc->wMaxPacketSize);
+
+ for (i = 1; i < UDC_EP_NUM; i++) {
+ if(!dev->ep[i].assigned) {
+ pxa_ep = &dev->ep[i];
+ pxa_ep->assigned = 1;
+ pxa_ep->ep_num = i;
+ break;
+ }
+ }
+ if (unlikely(i == UDC_EP_NUM)) {
+ printk(KERN_ERR __FILE__ ": Failed to find a spare endpoint\n");
+ return ep;
+ }
+
+
+ ep = &pxa_ep->ep;
+
+ pxa_ep->dev = dev;
+ pxa_ep->desc = desc;
+ pxa_ep->pio_irqs = pxa_ep->dma_irqs = 0;
+ pxa_ep->dma = -1;
+
+ if (!(desc->bEndpointAddress & 0xF))
+ desc->bEndpointAddress |= i;
+
+ if (!(desc->wMaxPacketSize)) {
+ validate_fifo_size(pxa_ep, desc->bmAttributes);
+ desc->wMaxPacketSize = pxa_ep->fifo_size;
+ } else
+ pxa_ep->fifo_size = desc->wMaxPacketSize;
+
+ pxa_ep->dir_in = (desc->bEndpointAddress & USB_DIR_IN) ? 1 : 0;
+ pxa_ep->ep_type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+ pxa_ep->stopped = 1;
+ pxa_ep->dma_con = 0;
+ pxa_ep->config = config;
+ pxa_ep->interface = interface;
+ pxa_ep->aisn = alt;
+
+ pxa_ep->reg_udccsr = &UDCCSR0 + i;
+ pxa_ep->reg_udcbcr = &UDCBCR0 + i;
+ pxa_ep->reg_udcdr = &UDCDR0 + i ;
+ pxa_ep->reg_udccr = &UDCCRA - 1 + i;
+#ifdef USE_DMA
+ pxa_ep->reg_drcmr = &DRCMR24 + i;
+#endif
+
+#if 0
+ DMSG("udccsr=0x%8x, udcbcr=0x%8x, udcdr=0x%8x,"
+ "udccr0=0x%8x\n",
+ (unsigned)pxa_ep->reg_udccsr,
+ (unsigned)pxa_ep->reg_udcbcr,
+ (unsigned)pxa_ep->reg_udcdr,
+ (unsigned)pxa_ep->reg_udccr);
+#endif
+ /* Configure UDCCR */
+ tmp = 0;
+ tmp |= (pxa_ep->config << UDCCONR_CN_S) & UDCCONR_CN;
+ tmp |= (pxa_ep->interface << UDCCONR_IN_S) & UDCCONR_IN;
+ tmp |= (pxa_ep->aisn << UDCCONR_AISN_S) & UDCCONR_AISN;
+ tmp |= (desc->bEndpointAddress << UDCCONR_EN_S) & UDCCONR_EN;
+ tmp |= (pxa_ep->ep_type << UDCCONR_ET_S) & UDCCONR_ET;
+ tmp |= (pxa_ep->dir_in) ? UDCCONR_ED : 0;
+ tmp |= (min(pxa_ep->fifo_size, (unsigned)desc->wMaxPacketSize) \
+ << UDCCONR_MPS_S ) & UDCCONR_MPS;
+ tmp |= UDCCONR_DE | UDCCONR_EE;
+// tmp |= UDCCONR_EE;
+
+ *pxa_ep->reg_udccr = tmp;
+
+#ifdef USE_DMA
+ /* Only BULK use DMA */
+ if ((pxa_ep->ep_type & USB_ENDPOINT_XFERTYPE_MASK)\
+ == USB_ENDPOINT_XFER_BULK)
+ *pxa_ep->reg_udccsr = UDCCSR_DME;
+#endif
+
+ DMSG("UDCCR: 0x%p is 0x%x\n", pxa_ep->reg_udccr,*pxa_ep->reg_udccr);
+
+ /* Fill ep name*/
+ name = kmalloc(NAME_SIZE, GFP_KERNEL);
+ if (!name) {
+ printk(KERN_ERR "%s: Error\n", __FUNCTION__);
+ return NULL;
+ }
+
+ switch (pxa_ep->ep_type) {
+ case USB_ENDPOINT_XFER_BULK:
+ sprintf(name, "Bulk-%s-%d", (pxa_ep->dir_in ? "in":"out"), i);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ sprintf(name, "Interrupt-%s-%d", (pxa_ep->dir_in ? \
+ "in":"out"), i);
+ break;
+ default:
+ sprintf(name, "endpoint-%s-%d", (pxa_ep->dir_in ? \
+ "in":"out"), i);
+ break;
+ }
+ ep->name = name;
+
+ ep->ops = &pxa27x_ep_ops;
+ ep->maxpacket = min((ushort)pxa_ep->fifo_size, desc->wMaxPacketSize);
+
+ list_add_tail (&ep->ep_list, &gadget->ep_list);
+ return ep;
+}
+
+EXPORT_SYMBOL(pxa27x_ep_config);
+
+/*-------------------------------------------------------------------------*/
+
+static void nop_release (struct device *dev)
+{
+ DMSG("%s %s\n", __FUNCTION__, 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 pxa27x_udc memory = {
+ .gadget = {
+ .ops = &pxa27x_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 = &pxa27x_ep_ops,
+ .maxpacket = EP0_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .reg_udccsr = &UDCCSR0,
+ .reg_udcdr = &UDCDR0,
+ }
+};
+
+#define CP15R0_VENDOR_MASK 0xffffe000
+
+#define CP15R0_XSCALE_VALUE 0x69054000 /* intel/arm/xscale */
+
+/*
+ * probe - binds to the platform device
+ */
+static int __init pxa27x_udc_probe(struct platform_device *_dev)
+{
+ struct pxa27x_udc *dev = &memory;
+ int retval;
+ u32 chiprev;
+
+ /* insist on Intel/ARM/XScale */
+ asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev));
+ if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) {
+ printk(KERN_ERR "%s: not XScale!\n", driver_name);
+ return -ENODEV;
+ }
+ /* other non-static parts of init */
+ dev->dev = &_dev->dev;
+ dev->mach = _dev->dev.platform_data;
+
+ init_timer(&dev->timer);
+ dev->timer.function = udc_watchdog;
+ dev->timer.data = (unsigned long) dev;
+
+ device_initialize(&dev->gadget.dev);
+ dev->gadget.dev.parent = &_dev->dev;
+ dev->gadget.dev.dma_mask = _dev->dev.dma_mask;
+
+ the_controller = dev;
+ platform_set_drvdata(_dev, dev);
+
+ udc_disable(dev);
+ udc_init_ep(dev);
+ udc_reinit(dev);
+
+ /* irq setup after old hardware state is cleaned up */
+ retval = request_irq(IRQ_USB, pxa27x_udc_irq,
+ SA_INTERRUPT, driver_name, dev);
+ if (retval != 0) {
+ printk(KERN_ERR "%s: can't get irq %i, err %d\n",
+ driver_name, IRQ_USB, retval);
+ return -EBUSY;
+ }
+ dev->got_irq = 1;
+
+ create_proc_files();
+
+ return 0;
+}
+
+static int __exit pxa27x_udc_remove(struct platform_device *_dev)
+{
+ struct pxa27x_udc *dev = (struct pxa27x_udc*)platform_get_drvdata(_dev);
+
+ udc_disable(dev);
+ remove_proc_files();
+ usb_gadget_unregister_driver(dev->driver);
+
+ if (dev->got_irq) {
+ free_irq(IRQ_USB, dev);
+ dev->got_irq = 0;
+ }
+ if (machine_is_lubbock() && dev->got_disc) {
+ free_irq(LUBBOCK_USB_DISC_IRQ, dev);
+ dev->got_disc = 0;
+ }
+ platform_set_drvdata(_dev, 0);
+ the_controller = 0;
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static void pxa27x_udc_shutdown(struct platform_device *_dev)
+{
+ struct pxa27x_udc *dev = (struct pxa27x_udc*)platform_get_drvdata(_dev);
+
+ udc_disable(dev);
+}
+
+static int pxa27x_udc_suspend(struct platform_device *_dev, pm_message_t state)
+{
+ int i;
+ struct pxa27x_udc *dev = (struct pxa27x_udc*)platform_get_drvdata(_dev);
+
+ DMSG("%s is called\n", __FUNCTION__);
+ dev->udccsr0 = UDCCSR0;
+ for(i=1; (i<UDC_EP_NUM); i++) {
+ if (dev->ep[i].assigned) {
+ struct pxa27x_ep *ep = &dev->ep[i];
+
+ ep->udccsr_value = *ep->reg_udccsr;
+ ep->udccr_value = *ep->reg_udccr;
+ DMSG("EP%d, udccsr:0x%x, udccr:0x%x\n",
+ i, *ep->reg_udccsr, *ep->reg_udccr);
+ }
+ }
+
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+ pxa_set_cken(CKEN11_USB, 0);
+ // MST_MSCWR2 |= MST_MSCWR2_nUSBC_SC;
+
+ return 0;
+}
+
+static int pxa27x_udc_resume(struct platform_device *_dev)
+{
+ int i;
+ struct pxa27x_udc *dev = (struct pxa27x_udc*)platform_get_drvdata(_dev);
+
+ DMSG("%s is called\n", __FUNCTION__);
+
+ UDCCSR0 = dev->udccsr0 & (UDCCSR0_FST | UDCCSR0_DME);
+ for (i=1; i < UDC_EP_NUM; i++) {
+ if (dev->ep[i].assigned) {
+ struct pxa27x_ep *ep = &dev->ep[i];
+
+ *ep->reg_udccsr = ep->udccsr_value;
+ *ep->reg_udccr = ep->udccr_value;
+ DMSG("EP%d, udccsr:0x%x, udccr:0x%x\n",
+ i, *ep->reg_udccsr, *ep->reg_udccr);
+ }
+ }
+ udc_enable(dev);
+ /* OTGPH bit is set when sleep mode is entered.
+ * it indicates that OTG pad is retaining its state.
+ * Upon exit from sleep mode and before clearing OTGPH,
+ * Software must configure the USB OTG pad, UDC, and UHC
+ * to the state they were in before entering sleep mode.*/
+ PSSR |= PSSR_OTGPH;
+ return 0;
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static struct platform_driver udc_driver = {
+ .driver = {
+ .name = "pxa2xx-udc",
+ },
+ .probe = pxa27x_udc_probe,
+ .remove = __exit_p(pxa27x_udc_remove),
+
+#ifdef CONFIG_PM
+ // FIXME power management support
+ .shutdown = pxa27x_udc_shutdown,
+ .suspend = pxa27x_udc_suspend,
+ .resume = pxa27x_udc_resume
+#endif
+};
+
+static int __init udc_init(void)
+{
+ printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
+ return platform_driver_register(&udc_driver);
+}
+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");
+
--- /dev/null
+++ b/drivers/usb/gadget/pxa27x_udc.h
@@ -0,0 +1,332 @@
+/*
+ * linux/drivers/usb/gadget/pxa27x_udc.h
+ * Intel PXA27x on-chip full speed USB device controller
+ *
+ * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
+ * Copyright (C) 2003 David Brownell
+ * Copyright (C) 2004 Intel Corporation
+ *
+ * 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
+ */
+
+#ifndef __LINUX_USB_GADGET_PXA27X_H
+#define __LINUX_USB_GADGET_PXA27X_H
+
+#include <linux/types.h>
+
+struct pxa27x_udc;
+
+struct pxa27x_ep {
+ struct usb_ep ep;
+ struct pxa27x_udc *dev;
+
+ const struct usb_endpoint_descriptor *desc;
+ struct list_head queue;
+ unsigned long pio_irqs;
+ unsigned long dma_irqs;
+
+ int dma;
+ unsigned fifo_size;
+ unsigned ep_num;
+ unsigned ep_type;
+
+ unsigned stopped : 1;
+ unsigned dma_con : 1;
+ unsigned dir_in : 1;
+ unsigned assigned : 1;
+
+ unsigned config;
+ unsigned interface;
+ unsigned aisn;
+ /* UDCCSR = UDC Control/Status Register for this EP
+ * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
+ * UDCDR = UDC Endpoint Data Register (the fifo)
+ * UDCCR = UDC Endpoint Configuration Registers
+ * DRCM = DMA Request Channel Map
+ */
+ volatile u32 *reg_udccsr;
+ volatile u32 *reg_udcbcr;
+ volatile u32 *reg_udcdr;
+ volatile u32 *reg_udccr;
+#ifdef USE_DMA
+ volatile u32 *reg_drcmr;
+#define drcmr(n) .reg_drcmr = & DRCMR ## n ,
+#else
+#define drcmr(n)
+#endif
+
+#ifdef CONFIG_PM
+ unsigned udccsr_value;
+ unsigned udccr_value;
+#endif
+};
+
+struct pxa27x_request {
+ struct usb_request req;
+ struct list_head queue;
+};
+
+enum ep0_state {
+ EP0_IDLE,
+ EP0_IN_DATA_PHASE,
+ EP0_OUT_DATA_PHASE,
+// EP0_END_XFER,
+ EP0_STALL,
+ EP0_NO_ACTION
+};
+
+#define EP0_FIFO_SIZE ((unsigned)16)
+#define BULK_FIFO_SIZE ((unsigned)64)
+#define ISO_FIFO_SIZE ((unsigned)256)
+#define INT_FIFO_SIZE ((unsigned)8)
+
+struct udc_stats {
+ struct ep0stats {
+ unsigned long ops;
+ unsigned long bytes;
+ } read, write;
+ unsigned long irqs;
+};
+
+#ifdef CONFIG_USB_PXA27X_SMALL
+/* when memory's tight, SMALL config saves code+data. */
+//#undef USE_DMA
+//#define UDC_EP_NUM 3
+#endif
+
+#ifndef UDC_EP_NUM
+#define UDC_EP_NUM 24
+#endif
+
+struct pxa27x_udc {
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+
+ enum ep0_state ep0state;
+ struct udc_stats stats;
+ unsigned got_irq : 1,
+ got_disc : 1,
+ has_cfr : 1,
+ req_pending : 1,
+ req_std : 1,
+ req_config : 1;
+
+#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
+ struct timer_list timer;
+
+ struct device *dev;
+ struct pxa2xx_udc_mach_info *mach;
+ u64 dma_mask;
+ struct pxa27x_ep ep [UDC_EP_NUM];
+
+ unsigned configuration,
+ interface,
+ alternate;
+#ifdef CONFIG_PM
+ unsigned udccsr0;
+#endif
+};
+
+/*-------------------------------------------------------------------------*/
+#if 0
+#ifdef DEBUG
+#define HEX_DISPLAY(n) do { \
+ if (machine_is_mainstone())\
+ { MST_LEDDAT1 = (n); } \
+ } while(0)
+
+#define HEX_DISPLAY1(n) HEX_DISPLAY(n)
+
+#define HEX_DISPLAY2(n) do { \
+ if (machine_is_mainstone()) \
+ { MST_LEDDAT2 = (n); } \
+ } while(0)
+
+#endif /* DEBUG */
+#endif
+/*-------------------------------------------------------------------------*/
+
+/* LEDs are only for debug */
+#ifndef HEX_DISPLAY
+#define HEX_DISPLAY(n) do {} while(0)
+#endif
+
+#ifndef LED_CONNECTED_ON
+#define LED_CONNECTED_ON do {} while(0)
+#define LED_CONNECTED_OFF do {} while(0)
+#endif
+#ifndef LED_EP0_ON
+#define LED_EP0_ON do {} while (0)
+#define LED_EP0_OFF do {} while (0)
+#endif
+
+static struct pxa27x_udc *the_controller;
+
+#if 0
+/*-------------------------------------------------------------------------*/
+
+
+/* one GPIO should be used to detect host disconnect */
+static inline int is_usb_connected(void)
+{
+ if (!the_controller->mach->udc_is_connected)
+ return 1;
+ return the_controller->mach->udc_is_connected();
+}
+
+/* one GPIO should force the host to see this device (or not) */
+static inline void make_usb_disappear(void)
+{
+ if (!the_controller->mach->udc_command)
+ return;
+ the_controller->mach->udc_command(PXA27X_UDC_CMD_DISCONNECT);
+}
+
+static inline void let_usb_appear(void)
+{
+ if (!the_controller->mach->udc_command)
+ return;
+ the_controller->mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Debugging support vanishes in non-debug builds. DBG_NORMAL should be
+ * mostly silent during normal use/testing, with no timing side-effects.
+ */
+#define DBG_NORMAL 1 /* error paths, device state transitions */
+#define DBG_VERBOSE 2 /* add some success path trace info */
+#define DBG_NOISY 3 /* ... even more: request level */
+#define DBG_VERY_NOISY 4 /* ... even more: packet level */
+
+#ifdef DEBUG
+
+static const char *state_name[] = {
+ "EP0_IDLE",
+ "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
+ "EP0_END_XFER", "EP0_STALL"
+};
+
+#define DMSG(stuff...) printk(KERN_ERR "udc: " stuff)
+
+#ifdef VERBOSE
+# define UDC_DEBUG DBG_VERBOSE
+#else
+# define UDC_DEBUG DBG_NORMAL
+#endif
+
+static void __attribute__ ((__unused__))
+dump_udccr(const char *label)
+{
+ u32 udccr = UDCCR;
+ DMSG("%s 0x%08x =%s%s%s%s%s%s%s%s%s%s, con=%d,inter=%d,altinter=%d\n",
+ label, udccr,
+ (udccr & UDCCR_OEN) ? " oen":"",
+ (udccr & UDCCR_AALTHNP) ? " aalthnp":"",
+ (udccr & UDCCR_AHNP) ? " rem" : "",
+ (udccr & UDCCR_BHNP) ? " rstir" : "",
+ (udccr & UDCCR_DWRE) ? " dwre" : "",
+ (udccr & UDCCR_SMAC) ? " smac" : "",
+ (udccr & UDCCR_EMCE) ? " emce" : "",
+ (udccr & UDCCR_UDR) ? " udr" : "",
+ (udccr & UDCCR_UDA) ? " uda" : "",
+ (udccr & UDCCR_UDE) ? " ude" : "",
+ (udccr & UDCCR_ACN) >> UDCCR_ACN_S,
+ (udccr & UDCCR_AIN) >> UDCCR_AIN_S,
+ (udccr & UDCCR_AAISN)>> UDCCR_AAISN_S );
+}
+
+static void __attribute__ ((__unused__))
+dump_udccsr0(const char *label)
+{
+ u32 udccsr0 = UDCCSR0;
+
+ DMSG("%s %s 0x%08x =%s%s%s%s%s%s%s\n",
+ label, state_name[the_controller->ep0state], udccsr0,
+ (udccsr0 & UDCCSR0_SA) ? " sa" : "",
+ (udccsr0 & UDCCSR0_RNE) ? " rne" : "",
+ (udccsr0 & UDCCSR0_FST) ? " fst" : "",
+ (udccsr0 & UDCCSR0_SST) ? " sst" : "",
+ (udccsr0 & UDCCSR0_DME) ? " dme" : "",
+ (udccsr0 & UDCCSR0_IPR) ? " ipr" : "",
+ (udccsr0 & UDCCSR0_OPC) ? " opr" : "");
+}
+
+static void __attribute__ ((__unused__))
+dump_state(struct pxa27x_udc *dev)
+{
+ unsigned i;
+
+ DMSG("%s, udcicr %02X.%02X, udcsir %02X.%02x, udcfnr %02X\n",
+ state_name[dev->ep0state],
+ UDCICR1, UDCICR0, UDCISR1, UDCISR0, UDCFNR);
+ dump_udccr("udccr");
+
+ if (!dev->driver) {
+ DMSG("no gadget driver bound\n");
+ return;
+ } else
+ DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
+
+
+ dump_udccsr0 ("udccsr0");
+ DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
+ dev->stats.write.bytes, dev->stats.write.ops,
+ dev->stats.read.bytes, dev->stats.read.ops);
+
+ for (i = 1; i < UDC_EP_NUM; i++) {
+ if (dev->ep [i].desc == 0)
+ continue;
+ DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccsr);
+ }
+}
+
+#if 0
+static void dump_regs(u8 ep)
+{
+ DMSG("EP:%d UDCCSR:0x%08x UDCBCR:0x%08x\n UDCCR:0x%08x\n",
+ ep,UDCCSN(ep), UDCBCN(ep), UDCCN(ep));
+}
+static void dump_req (struct pxa27x_request *req)
+{
+ struct usb_request *r = &req->req;
+
+ DMSG("%s: buf:0x%08x length:%d dma:0x%08x actual:%d\n",
+ __FUNCTION__, (unsigned)r->buf, r->length,
+ r->dma, r->actual);
+}
+#endif
+
+#else
+
+#define DMSG(stuff...) do{}while(0)
+
+#define dump_udccr(x) do{}while(0)
+#define dump_udccsr0(x) do{}while(0)
+#define dump_state(x) do{}while(0)
+
+#define UDC_DEBUG ((unsigned)0)
+
+#endif
+
+#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
+
+#define WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
+#define INFO(stuff...) printk(KERN_INFO "udc: " stuff)
+
+
+#endif /* __LINUX_USB_GADGET_PXA27X_H */
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