Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751188AbVKFTt1 (ORCPT ); Sun, 6 Nov 2005 14:49:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750941AbVKFTt1 (ORCPT ); Sun, 6 Nov 2005 14:49:27 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:48301 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S1750796AbVKFTt0 (ORCPT ); Sun, 6 Nov 2005 14:49:26 -0500 Date: Sun, 6 Nov 2005 20:47:11 +0100 From: Pavel Machek To: Richard Purdie Cc: lenz@cs.wisc.edu, kernel list , dkrivoschokov@dev.rtsoft.ru Subject: Re: pxa27x_udc -- support for usb gadget for pxa27x? Message-ID: <20051106194711.GE29901@elf.ucw.cz> References: <20051103221402.GA28206@elf.ucw.cz> <1131057308.8523.92.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1131057308.8523.92.camel@localhost.localdomain> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 77371 Lines: 2896 Hi! > > Is there recent version somewhere? I found one version > > (pxa27x-0218.patch), but it is *really* old. > > Pull it out of handhelds.org kernel26 cvs tree and let me and the usb > developers have the patch please :) This is what I extracted, with makefile hack to actually include it. [I'm signing it off, because GPL gives me right to distribute. I'm not saying this is good code or something. It could use some cleanups.] ...ahha, so it does not even compile. At the end, you'll find my fixes. Add pxa27x udc drivers from handhelds.org tree. Signed-off-by: Pavel Machek --- commit d876994b61ffc16ac949a4094fa4e04a90ca782a tree 330747a59bf128526a9f3f9eee023dd4f8c428fb parent bd8d7bcb11d32f50dce05ec96fdfbbc7489e8d62 author Sun, 06 Nov 2005 20:34:07 +0100 committer Sun, 06 Nov 2005 20:34:07 +0100 drivers/usb/gadget/Makefile | 2 drivers/usb/gadget/pxa27x_udc.c | 2347 +++++++++++++++++++++++++++++++++++++++ drivers/usb/gadget/pxa27x_udc.h | 332 ++++++ 3 files changed, 2680 insertions(+), 1 deletions(-) diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile --- 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-$(CONFIG_MACH_SPITZ) += pxa27x_udc.o # # USB gadget drivers @@ -27,4 +28,3 @@ obj-$(CONFIG_USB_ETH) += g_ether.o obj-$(CONFIG_USB_GADGETFS) += gadgetfs.o obj-$(CONFIG_USB_FILE_STORAGE) += g_file_storage.o obj-$(CONFIG_USB_G_SERIAL) += g_serial.o - diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c new file mode 100644 --- /dev/null +++ b/drivers/usb/gadget/pxa27x_udc.c @@ -0,0 +1,2347 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + + +/* + * 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, struct pt_regs *r); +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, int 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, int 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 pt_regs *r) +{ + 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_ENRINTR) { //Only happened in OUT DMA + int remain,udccsr ; + + DCSR(dmach) = DCSR_ENRINTR; + 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, int 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; + 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 + 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 pt_regs *r) +{ + 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_IESU)) { + UDCISR1 = UDCISR1_IESU; + 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_IERU)) { + UDCISR1 = UDCISR1_IERU; + 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_IECC)) { + 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_IECC; + DMSG("%s: con:%d,inter:%d,alt:%d\n", + __FUNCTION__, config,interface, alternate); + } + + /* ReSeT Interrupt Request - USB reset */ + if (unlikely(udcir & UDCISR1_IERS)) { + UDCISR1 = UDCISR1_IERS; + 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 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->mach = _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->gadget.dev.dma_mask = _dev->dma_mask; + + the_controller = dev; + dev_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 device *_dev) +{ + struct pxa27x_udc *dev = _dev->driver_data; + + 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; + } + dev_set_drvdata(_dev, 0); + the_controller = 0; + return 0; +} + +#ifdef CONFIG_PM +static int pxa27x_udc_suspend(struct device *_dev, u32 state, u32 level) +{ + int i; + struct pxa27x_udc *dev = (struct pxa27x_udc*)dev_get_drvdata(_dev); + + DMSG("%s is called\n", __FUNCTION__); + if (level == SUSPEND_POWER_DOWN) { + DMSG("%s will go into SUSPEND_POWER_DOWN\n", __FUNCTION__); + dev->udccsr0 = UDCCSR0; + for(i=1; (iep[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 device *_dev, u32 level) +{ + int i; + struct pxa27x_udc *dev = (struct pxa27x_udc*)dev_get_drvdata(_dev); + + DMSG("%s is called\n", __FUNCTION__); + if (level == RESUME_POWER_ON) { + DMSG("%s: udc resume\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 device_driver udc_driver = { + .name = "pxa2xx-udc", + .bus = &platform_bus_type, + .probe = pxa27x_udc_probe, + .remove = __exit_p(pxa27x_udc_remove), + +#ifdef CONFIG_PM + // FIXME power management support + .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 driver_register(&udc_driver); +} +module_init(udc_init); + +static void __exit udc_exit(void) +{ + driver_unregister(&udc_driver); +} +module_exit(udc_exit); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell"); +MODULE_LICENSE("GPL"); + diff --git a/drivers/usb/gadget/pxa27x_udc.h b/drivers/usb/gadget/pxa27x_udc.h new file mode 100644 --- /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 , 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 + +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 */ Fix compilation problems and fix warnings. Signed-off-by: Pavel Machek --- commit ab6660987b2c2b116995c5f827937d07613088fd tree 0430d753e0879b40570844554411bdf03c978d3e parent d876994b61ffc16ac949a4094fa4e04a90ca782a author Sun, 06 Nov 2005 20:46:12 +0100 committer Sun, 06 Nov 2005 20:46:12 +0100 drivers/usb/gadget/pxa27x_udc.c | 79 +++++++++++++++++++-------------------- 1 files changed, 38 insertions(+), 41 deletions(-) diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c --- a/drivers/usb/gadget/pxa27x_udc.c +++ b/drivers/usb/gadget/pxa27x_udc.c @@ -89,7 +89,7 @@ static const char driver_name [] = "pxa2 static const char ep0name [] = "ep0"; -#define USE_DMA +#undef USE_DMA //#define DISABLE_TEST_MODE #ifdef CONFIG_PROC_FS @@ -327,7 +327,7 @@ static int pxa27x_ep_disable (struct usb * pxa27x_ep_alloc_request - allocate a request data structure */ static struct usb_request * -pxa27x_ep_alloc_request (struct usb_ep *_ep, int gfp_flags) +pxa27x_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) { struct pxa27x_request *req; @@ -362,7 +362,7 @@ pxa27x_ep_free_request (struct usb_ep *_ */ static void * pxa27x_ep_alloc_buffer(struct usb_ep *_ep, unsigned bytes, - dma_addr_t *dma, int gfp_flags) + dma_addr_t *dma, gfp_t gfp_flags) { char *retval; @@ -850,7 +850,7 @@ static void dma_nodesc_handler(int dmach /*-------------------------------------------------------------------------*/ static int -pxa27x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags) +pxa27x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { struct pxa27x_ep *ep; struct pxa27x_request *req; @@ -2253,62 +2253,59 @@ static int __exit pxa27x_udc_remove(stru } #ifdef CONFIG_PM -static int pxa27x_udc_suspend(struct device *_dev, u32 state, u32 level) +static int pxa27x_udc_suspend(struct device *_dev, pm_message_t state) { int i; struct pxa27x_udc *dev = (struct pxa27x_udc*)dev_get_drvdata(_dev); DMSG("%s is called\n", __FUNCTION__); - if (level == SUSPEND_POWER_DOWN) { - DMSG("%s will go into SUSPEND_POWER_DOWN\n", __FUNCTION__); - dev->udccsr0 = UDCCSR0; - for(i=1; (iep[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; + DMSG("%s will go into SUSPEND_POWER_DOWN\n", __FUNCTION__); + dev->udccsr0 = UDCCSR0; + for(i=1; (iep[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 device *_dev, u32 level) +static int pxa27x_udc_resume(struct device *_dev) { int i; struct pxa27x_udc *dev = (struct pxa27x_udc*)dev_get_drvdata(_dev); DMSG("%s is called\n", __FUNCTION__); - if (level == RESUME_POWER_ON) { - DMSG("%s: udc resume\n", __FUNCTION__); + DMSG("%s: udc resume\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); - } + 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; } + 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 -- Thanks, Sharp! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/