/*
* linux/drivers/usb/gadget/pxa2xx_udc.c
- * Intel PXA2xx and IXP4xx on-chip full speed USB device controllers
+ * Intel PXA25x and IXP4xx on-chip full speed USB device controllers
*
* Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker)
* Copyright (C) 2003 Robert Schwebel, Pengutronix
*
*/
-#undef DEBUG
// #define VERBOSE DBG_VERBOSE
-#include <linux/config.h>
+#include <linux/device.h>
#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/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <asm/byteorder.h>
#include <asm/dma.h>
+#include <asm/gpio.h>
#include <asm/io.h>
-#include <asm/irq.h>
#include <asm/system.h>
#include <asm/mach-types.h>
#include <asm/unaligned.h>
#include <asm/hardware.h>
-#include <asm/arch/pxa-regs.h>
-#include <linux/usb_ch9.h>
-#include <linux/usb_gadget.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
-#include <asm/arch/udc.h>
+#include <asm/mach/udc_pxa2xx.h>
/*
- * This driver handles the USB Device Controller (UDC) in Intel's PXA 2xx
+ * This driver handles the USB Device Controller (UDC) in Intel's PXA 25x
* series processors. The UDC for the IXP 4xx series is very similar.
* There are fifteen endpoints, in addition to ep0.
*
* by the host to interact with this device, and allocates endpoints to
* the different protocol interfaces. The controller driver virtualizes
* usb hardware so that the gadget drivers will be more portable.
- *
+ *
* This UDC hardware wants to implement a bit too much USB protocol, so
* it constrains the sorts of USB configuration change events that work.
* The errata for these chips are misleading; some "fixed" bugs from
* pxa250 a0/a1 b0/b1/b2 sure act like they're still there.
+ *
+ * Note that the UDC hardware supports DMA (except on IXP) but that's
+ * not used here. IN-DMA (to host) is simple enough, when the data is
+ * suitably aligned (16 bytes) ... the network stack doesn't do that,
+ * other software can. OUT-DMA is buggy in most chip versions, as well
+ * as poorly designed (data toggle not automatic). So this driver won't
+ * bother using DMA. (Mostly-working IN-DMA support was available in
+ * kernels before 2.6.23, but was never enabled or well tested.)
*/
-#define DRIVER_VERSION "14-Dec-2003"
-#define DRIVER_DESC "PXA 2xx USB Device Controller driver"
+#define DRIVER_VERSION "30-June-2007"
+#define DRIVER_DESC "PXA 25x USB Device Controller driver"
static const char driver_name [] = "pxa2xx_udc";
static const char ep0name [] = "ep0";
-// #define USE_DMA
-// #define USE_OUT_DMA
-// #define DISABLE_TEST_MODE
-
#ifdef CONFIG_ARCH_IXP4XX
-#undef USE_DMA
/* cpu-specific register addresses are compiled in to this code */
#ifdef CONFIG_ARCH_PXA
#include "pxa2xx_udc.h"
-#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 pxa2xx_ep *ep, struct pxa2xx_request *req);
-
-#ifdef USE_OUT_DMA
-#define DMASTR " (dma support)"
-#else
-#define DMASTR " (dma in)"
-#endif
-
-#else /* !USE_DMA */
-#define DMASTR " (pio only)"
-#undef USE_OUT_DMA
-#endif
-
#ifdef CONFIG_USB_PXA2XX_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, "pxa2xx udc fifo mode");
-#endif
-
/* ---------------------------------------------------------------------------
- * endpoint related parts of the api to the usb controller hardware,
+ * endpoint related parts of the api to the usb controller hardware,
* used by gadget driver; and the inner talker-to-hardware core.
* ---------------------------------------------------------------------------
*/
static void pxa2xx_ep_fifo_flush (struct usb_ep *ep);
static void nuke (struct pxa2xx_ep *, int status);
+/* one GPIO should be used to detect VBUS from the host */
+static int is_vbus_present(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_vbus) {
+ int value = gpio_get_value(mach->gpio_vbus);
+ return mach->gpio_vbus_inverted ? !value : value;
+ }
+ if (mach->udc_is_connected)
+ return mach->udc_is_connected();
+ return 1;
+}
+
+/* one GPIO should control a D+ pullup, so host sees this device (or not) */
+static void pullup_off(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_pullup)
+ gpio_set_value(mach->gpio_pullup, 0);
+ else if (mach->udc_command)
+ mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+}
+
+static void pullup_on(void)
+{
+ struct pxa2xx_udc_mach_info *mach = the_controller->mach;
+
+ if (mach->gpio_pullup)
+ gpio_set_value(mach->gpio_pullup, 1);
+ else if (mach->udc_command)
+ mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+}
+
static void pio_irq_enable(int bEndpointAddress)
{
bEndpointAddress &= 0xf;
}
ep->desc = desc;
- ep->dma = -1;
ep->stopped = 0;
- ep->pio_irqs = ep->dma_irqs = 0;
+ ep->pio_irqs = 0;
ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize);
/* flush fifo (mostly for OUT buffers) */
/* ... 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.
- */
- switch (ep->bmAttributes) {
- 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);
- }
- }
-#endif
-
DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
return 0;
}
static int pxa2xx_ep_disable (struct usb_ep *_ep)
{
struct pxa2xx_ep *ep;
+ unsigned long flags;
ep = container_of (_ep, struct pxa2xx_ep, ep);
if (!_ep || !ep->desc) {
_ep ? ep->ep.name : NULL);
return -EINVAL;
}
- nuke (ep, -ESHUTDOWN);
+ local_irq_save(flags);
-#ifdef USE_DMA
- if (ep->dma >= 0) {
- *ep->reg_drcmr = 0;
- pxa_free_dma (ep->dma);
- ep->dma = -1;
- }
-#endif
+ nuke (ep, -ESHUTDOWN);
/* flush fifo (mostly for IN buffers) */
pxa2xx_ep_fifo_flush (_ep);
ep->desc = NULL;
ep->stopped = 1;
+ local_irq_restore(flags);
DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
return 0;
}
*/
/*
- * pxa2xx_ep_alloc_request - allocate a request data structure
+ * pxa2xx_ep_alloc_request - allocate a request data structure
*/
static struct usb_request *
-pxa2xx_ep_alloc_request (struct usb_ep *_ep, int gfp_flags)
+pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
{
struct pxa2xx_request *req;
- req = kmalloc (sizeof *req, gfp_flags);
+ req = kzalloc(sizeof(*req), gfp_flags);
if (!req)
return NULL;
- memset (req, 0, sizeof *req);
INIT_LIST_HEAD (&req->queue);
return &req->req;
}
/*
- * pxa2xx_ep_free_request - deallocate a request data structure
+ * pxa2xx_ep_free_request - deallocate a request data structure
*/
static void
pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
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 *
-pxa2xx_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)
-#ifdef USE_DMA
- *dma = virt_to_bus (retval);
-#else
- *dma = (dma_addr_t)~0;
-#endif
- return retval;
-}
-
-static void
-pxa2xx_ep_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma,
- unsigned bytes)
-{
- kfree (buf);
-}
-
/*-------------------------------------------------------------------------*/
/*
/* 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)) {
+ if (list_empty(&ep->queue))
pio_irq_disable (ep->bEndpointAddress);
-#ifdef USE_DMA
- /* unaligned data and zlps couldn't use dma */
- if (unlikely(!list_empty(&ep->queue))) {
- req = list_entry(ep->queue.next,
- struct pxa2xx_request, queue);
- kick_dma(ep,req);
- return 0;
- }
-#endif
- }
return 1;
}
count = req->req.length;
done (ep, req, 0);
ep0_idle(ep->dev);
+#ifndef CONFIG_ARCH_IXP4XX
#if 1
/* This seems to get rid of lost status irqs in some cases:
* host responds quickly, or next request involves config
} while (count);
}
#endif
+#endif
} else if (ep->dev->req_pending)
ep0start(ep->dev, 0, "IN");
return is_short;
return 0;
}
-#ifdef USE_DMA
-
-#define MAX_IN_DMA ((DCMD_LENGTH + 1) - BULK_FIFO_SIZE)
-
-static void
-start_dma_nodesc(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int is_in)
-{
- u32 dcmd = req->req.length;
- u32 buf = req->req.dma;
- u32 fifo = io_v2p ((u32)ep->reg_uddr);
-
- /* caller guarantees there's a packet or more remaining
- * - IN may end with a short packet (TSP set separately),
- * - OUT is always full length
- */
- buf += req->req.actual;
- dcmd -= req->req.actual;
- ep->dma_fixup = 0;
-
- /* no-descriptor mode can be simple for bulk-in, iso-in, iso-out */
- DCSR(ep->dma) = DCSR_NODESC;
- if (is_in) {
- DSADR(ep->dma) = buf;
- DTADR(ep->dma) = fifo;
- if (dcmd > MAX_IN_DMA)
- dcmd = MAX_IN_DMA;
- else
- ep->dma_fixup = (dcmd % ep->ep.maxpacket) != 0;
- dcmd |= DCMD_BURST32 | DCMD_WIDTH1
- | DCMD_FLOWTRG | DCMD_INCSRCADDR;
- } else {
-#ifdef USE_OUT_DMA
- DSADR(ep->dma) = fifo;
- DTADR(ep->dma) = buf;
- if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
- dcmd = ep->ep.maxpacket;
- dcmd |= DCMD_BURST32 | DCMD_WIDTH1
- | DCMD_FLOWSRC | DCMD_INCTRGADDR;
-#endif
- }
- DCMD(ep->dma) = dcmd;
- DCSR(ep->dma) = DCSR_RUN | DCSR_NODESC
- | (unlikely(is_in)
- ? DCSR_STOPIRQEN /* use dma_nodesc_handler() */
- : 0); /* use handle_ep() */
-}
-
-static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req)
-{
- int is_in = ep->bEndpointAddress & USB_DIR_IN;
-
- if (is_in) {
- /* unaligned tx buffers and zlps only work with PIO */
- if ((req->req.dma & 0x0f) != 0
- || unlikely((req->req.length - req->req.actual)
- == 0)) {
- pio_irq_enable(ep->bEndpointAddress);
- if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0)
- (void) write_fifo(ep, req);
- } else {
- start_dma_nodesc(ep, req, USB_DIR_IN);
- }
- } else {
- if ((req->req.length - req->req.actual) < ep->ep.maxpacket) {
- DMSG("%s short dma read...\n", ep->ep.name);
- /* we're always set up for pio out */
- read_fifo (ep, req);
- } else {
- *ep->reg_udccs = UDCCS_BO_DME
- | (*ep->reg_udccs & UDCCS_BO_FST);
- start_dma_nodesc(ep, req, USB_DIR_OUT);
- }
- }
-}
-
-static void cancel_dma(struct pxa2xx_ep *ep)
-{
- struct pxa2xx_request *req;
- u32 tmp;
-
- if (DCSR(ep->dma) == 0 || list_empty(&ep->queue))
- return;
-
- DCSR(ep->dma) = 0;
- while ((DCSR(ep->dma) & DCSR_STOPSTATE) == 0)
- cpu_relax();
-
- req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
- tmp = DCMD(ep->dma) & DCMD_LENGTH;
- req->req.actual = req->req.length - (tmp & DCMD_LENGTH);
-
- /* the last tx packet may be incomplete, so flush the fifo.
- * FIXME correct req.actual if we can
- */
- if (ep->bEndpointAddress & USB_DIR_IN)
- *ep->reg_udccs = UDCCS_BI_FTF;
-}
-
-/* dma channel stopped ... normal tx end (IN), or on error (IN/OUT) */
-static void dma_nodesc_handler(int dmach, void *_ep, struct pt_regs *r)
-{
- struct pxa2xx_ep *ep = _ep;
- struct pxa2xx_request *req;
- u32 tmp, completed;
-
- local_irq_disable();
-
- req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
-
- ep->dma_irqs++;
- ep->dev->stats.irqs++;
- HEX_DISPLAY(ep->dev->stats.irqs);
-
- /* ack/clear */
- tmp = DCSR(ep->dma);
- DCSR(ep->dma) = tmp;
- if ((tmp & DCSR_STOPSTATE) == 0
- || (DDADR(ep->dma) & DDADR_STOP) != 0) {
- DBG(DBG_VERBOSE, "%s, dcsr %08x ddadr %08x\n",
- ep->ep.name, DCSR(ep->dma), DDADR(ep->dma));
- goto done;
- }
- DCSR(ep->dma) = 0; /* clear DCSR_STOPSTATE */
-
- /* update transfer status */
- completed = tmp & DCSR_BUSERR;
- if (ep->bEndpointAddress & USB_DIR_IN)
- tmp = DSADR(ep->dma);
- else
- tmp = DTADR(ep->dma);
- req->req.actual = tmp - req->req.dma;
-
- /* FIXME seems we sometimes see partial transfers... */
-
- if (unlikely(completed != 0))
- req->req.status = -EIO;
- else if (req->req.actual) {
- /* these registers have zeroes in low bits; they miscount
- * some (end-of-transfer) short packets: tx 14 as tx 12
- */
- if (ep->dma_fixup)
- req->req.actual = min(req->req.actual + 3,
- req->req.length);
-
- tmp = (req->req.length - req->req.actual);
- completed = (tmp == 0);
- if (completed && (ep->bEndpointAddress & USB_DIR_IN)) {
-
- /* maybe validate final short packet ... */
- if ((req->req.actual % ep->ep.maxpacket) != 0)
- *ep->reg_udccs = UDCCS_BI_TSP/*|UDCCS_BI_TPC*/;
-
- /* ... or zlp, using pio fallback */
- else if (ep->bmAttributes == USB_ENDPOINT_XFER_BULK
- && req->req.zero) {
- DMSG("%s zlp terminate ...\n", ep->ep.name);
- completed = 0;
- }
- }
- }
-
- if (likely(completed)) {
- done(ep, req, 0);
-
- /* maybe re-activate after completion */
- if (ep->stopped || list_empty(&ep->queue))
- goto done;
- req = list_entry(ep->queue.next, struct pxa2xx_request, queue);
- }
- kick_dma(ep, req);
-done:
- local_irq_enable();
-}
-
-#endif
-
/*-------------------------------------------------------------------------*/
static int
-pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
+pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
{
struct pxa2xx_request *req;
struct pxa2xx_ep *ep;
(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->bEndpointAddress & USB_DIR_IN) != 0)
- ? 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);
+ _ep->name, _req, _req->length, _req->buf);
local_irq_save(flags);
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->bEndpointAddress & USB_DIR_IN) != 0
- && (*ep->reg_udccs & UDCCS_BI_TFS) != 0
- && write_fifo(ep, req)) {
- req = NULL;
+ } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
+ if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0
+ && write_fifo(ep, req))
+ req = NULL;
} else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0
&& read_fifo(ep, req)) {
req = NULL;
}
- if (likely (req && ep->desc) && ep->dma < 0)
+ if (likely (req && ep->desc))
pio_irq_enable(ep->bEndpointAddress);
}
/*
- * nuke - dequeue ALL requests
+ * nuke - dequeue ALL requests
*/
static void nuke(struct pxa2xx_ep *ep, int status)
{
struct pxa2xx_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 pxa2xx_request,
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 pxa2xx_request, queue);
- kick_dma(ep, req);
- }
- } else
-#endif
- done(ep, req, -ECONNRESET);
+ done(ep, req, -ECONNRESET);
local_irq_restore(flags);
return 0;
ep->dev->req_pending = 0;
ep->dev->ep0state = EP0_STALL;
- /* and bulk/intr endpoints like dropping stalls too */
- } else {
- unsigned i;
- for (i = 0; i < 1000; i += 20) {
- if (*ep->reg_udccs & UDCCS_BI_SST)
- break;
- udelay(20);
- }
- }
- local_irq_restore(flags);
+ /* and bulk/intr endpoints like dropping stalls too */
+ } else {
+ unsigned i;
+ for (i = 0; i < 1000; i += 20) {
+ if (*ep->reg_udccs & UDCCS_BI_SST)
+ break;
+ udelay(20);
+ }
+ }
+ local_irq_restore(flags);
DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
return 0;
.alloc_request = pxa2xx_ep_alloc_request,
.free_request = pxa2xx_ep_free_request,
- .alloc_buffer = pxa2xx_ep_alloc_buffer,
- .free_buffer = pxa2xx_ep_free_buffer,
-
.queue = pxa2xx_ep_queue,
.dequeue = pxa2xx_ep_dequeue,
/* ---------------------------------------------------------------------------
- * device-scoped parts of the api to the usb controller hardware
+ * device-scoped parts of the api to the usb controller hardware
* ---------------------------------------------------------------------------
*/
static void udc_disable(struct pxa2xx_udc *);
/* We disable the UDC -- and its 48 MHz clock -- whenever it's not
- * in active use.
+ * in active use.
*/
static int pullup(struct pxa2xx_udc *udc, int is_active)
{
udc = container_of(_gadget, struct pxa2xx_udc, gadget);
/* not all boards support pullup control */
- if (!udc->mach->udc_command)
+ if (!udc->mach->gpio_pullup && !udc->mach->udc_command)
return -EOPNOTSUPP;
is_active = (is_active != 0);
/* basic device status */
t = scnprintf(next, size, DRIVER_DESC "\n"
"%s version: %s\nGadget driver: %s\nHost %s\n\n",
- driver_name, DRIVER_VERSION SIZE_STR DMASTR,
+ driver_name, DRIVER_VERSION SIZE_STR "(pio)",
dev->driver ? dev->driver->driver.name : "(none)",
- is_usb_connected() ? "full speed" : "disconnected");
+ is_vbus_present() ? "full speed" : "disconnected");
size -= t;
next += t;
next += t;
}
- if (!is_usb_connected() || !dev->driver)
+ if (!is_vbus_present() || !dev->driver)
goto done;
t = scnprintf(next, size, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
struct pxa2xx_ep *ep = &dev->ep [i];
struct pxa2xx_request *req;
- int t;
if (i != 0) {
const struct usb_endpoint_descriptor *d;
continue;
tmp = *dev->ep [i].reg_udccs;
t = scnprintf(next, size,
- "%s max %d %s udccs %02x irqs %lu/%lu\n",
+ "%s max %d %s udccs %02x irqs %lu\n",
ep->ep.name, le16_to_cpu (d->wMaxPacketSize),
- (ep->dma >= 0) ? "dma" : "pio", tmp,
- ep->pio_irqs, ep->dma_irqs);
+ "pio", tmp, ep->pio_irqs);
/* TODO translate all five groups of udccs bits! */
} else /* ep0 should only have one transfer queued */
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,
+ t = scnprintf(next, size,
"\treq %p len %d/%d buf %p\n",
&req->req, req->req.actual,
req->req.length, req->req.buf);
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
-/* "function" sysfs attribute */
-static ssize_t
-show_function (struct device *_dev, struct device_attribute *attr, char *buf)
-{
- struct pxa2xx_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
+ * udc_disable - disable USB device controller
*/
static void udc_disable(struct pxa2xx_udc *dev)
{
UFNRH = UFNRH_SIM;
/* if hardware supports it, disconnect from usb */
- make_usb_disappear();
+ pullup_off();
udc_clear_mask_UDCCR(UDCCR_UDE);
#ifdef CONFIG_ARCH_PXA
/* Disable clock for USB device */
- pxa_set_cken(CKEN11_USB, 0);
+ clk_disable(dev->clk);
#endif
ep0_idle (dev);
dev->gadget.speed = USB_SPEED_UNKNOWN;
- LED_CONNECTED_OFF;
}
/*
- * udc_reinit - initialize software state
+ * udc_reinit - initialize software state
*/
static void udc_reinit(struct pxa2xx_udc *dev)
{
ep->desc = NULL;
ep->stopped = 0;
INIT_LIST_HEAD (&ep->queue);
- ep->pio_irqs = ep->dma_irqs = 0;
+ ep->pio_irqs = 0;
}
/* the rest was statically initialized, and is read-only */
#ifdef CONFIG_ARCH_PXA
/* Enable clock for USB device */
- pxa_set_cken(CKEN11_USB, 1);
- udelay(5);
+ clk_enable(dev->clk);
#endif
/* try to clear these bits before we enable the udc */
UDC_RES2 = 0x00;
}
-#ifdef DISABLE_TEST_MODE
- /* "test mode" seems to have become the default in later chip
- * revs, preventing double buffering (and invalidating docs).
- * this EXPERIMENT enables it for bulk endpoints by tweaking
- * undefined/reserved register bits (that other drivers clear).
- * Belcarra code comments noted this usage.
- */
- if (fifo_mode & 1) { /* IN endpoints */
- UDC_RES1 |= USIR0_IR1|USIR0_IR6;
- UDC_RES2 |= USIR1_IR11;
- }
- if (fifo_mode & 2) { /* OUT endpoints */
- UDC_RES1 |= USIR0_IR2|USIR0_IR7;
- UDC_RES2 |= USIR1_IR12;
- }
-#endif
-
/* enable suspend/resume and reset irqs */
udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM);
UICR0 &= ~UICR0_IM0;
/* if hardware supports it, pullup D+ and wait for reset */
- let_usb_appear();
+ pullup_on();
}
int retval;
if (!driver
- || driver->speed != USB_SPEED_FULL
+ || driver->speed < USB_SPEED_FULL
|| !driver->bind
- || !driver->unbind
|| !driver->disconnect
|| !driver->setup)
return -EINVAL;
dev->gadget.dev.driver = &driver->driver;
dev->pullup = 1;
- device_add (&dev->gadget.dev);
+ retval = device_add (&dev->gadget.dev);
+ if (retval) {
+fail:
+ dev->driver = NULL;
+ dev->gadget.dev.driver = NULL;
+ return retval;
+ }
retval = driver->bind(&dev->gadget);
if (retval) {
DMSG("bind to driver %s --> error %d\n",
driver->driver.name, retval);
device_del (&dev->gadget.dev);
-
- dev->driver = NULL;
- dev->gadget.dev.driver = NULL;
- return retval;
+ goto fail;
}
- 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.
del_timer_sync(&dev->timer);
/* report disconnect; the driver is already quiesced */
- LED_CONNECTED_OFF;
if (driver)
driver->disconnect(&dev->gadget);
if (!dev)
return -ENODEV;
- if (!driver || driver != dev->driver)
+ if (!driver || driver != dev->driver || !driver->unbind)
return -EINVAL;
local_irq_disable();
local_irq_enable();
driver->unbind(&dev->gadget);
+ dev->gadget.dev.driver = NULL;
dev->driver = NULL;
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);
*/
static irqreturn_t
-lubbock_vbus_irq(int irq, void *_dev, struct pt_regs *r)
+lubbock_vbus_irq(int irq, void *_dev)
{
struct pxa2xx_udc *dev = _dev;
int vbus;
dev->stats.irqs++;
- HEX_DISPLAY(dev->stats.irqs);
switch (irq) {
case LUBBOCK_USB_IRQ:
- LED_CONNECTED_ON;
vbus = 1;
disable_irq(LUBBOCK_USB_IRQ);
enable_irq(LUBBOCK_USB_DISC_IRQ);
break;
case LUBBOCK_USB_DISC_IRQ:
- LED_CONNECTED_OFF;
vbus = 0;
disable_irq(LUBBOCK_USB_DISC_IRQ);
enable_irq(LUBBOCK_USB_IRQ);
#endif
+static irqreturn_t udc_vbus_irq(int irq, void *_dev)
+{
+ struct pxa2xx_udc *dev = _dev;
+ int vbus = gpio_get_value(dev->mach->gpio_vbus);
+
+ if (dev->mach->gpio_vbus_inverted)
+ vbus = !vbus;
+
+ pxa2xx_udc_vbus_session(&dev->gadget, vbus);
+ return IRQ_HANDLED;
+}
+
/*-------------------------------------------------------------------------*/
/* fifos can hold packets, ready for reading... */
if (likely(req)) {
-#ifdef USE_OUT_DMA
-// TODO didn't yet debug out-dma. this approach assumes
-// the worst about short packets and RPC; it might be better.
-
- if (likely(ep->dma >= 0)) {
- if (!(udccs & UDCCS_BO_RSP)) {
- *ep->reg_udccs = UDCCS_BO_RPC;
- ep->dma_irqs++;
- return;
- }
- }
-#endif
completed = read_fifo(ep, req);
} else
pio_irq_disable (ep->bEndpointAddress);
* could cause usb protocol errors.
*/
static irqreturn_t
-pxa2xx_udc_irq(int irq, void *_dev, struct pt_regs *r)
+pxa2xx_udc_irq(int irq, void *_dev)
{
struct pxa2xx_udc *dev = _dev;
int handled;
dev->stats.irqs++;
- HEX_DISPLAY(dev->stats.irqs);
do {
u32 udccr = UDCCR;
if (unlikely(udccr & UDCCR_SUSIR)) {
udc_ack_int_UDCCR(UDCCR_SUSIR);
handled = 1;
- DBG(DBG_VERBOSE, "USB suspend%s\n", is_usb_connected()
+ DBG(DBG_VERBOSE, "USB suspend%s\n", is_vbus_present()
? "" : "+disconnect");
- if (!is_usb_connected())
+ if (!is_vbus_present())
stop_activity(dev, dev->driver);
else if (dev->gadget.speed != USB_SPEED_UNKNOWN
&& dev->driver
if (dev->gadget.speed != USB_SPEED_UNKNOWN
&& dev->driver
&& dev->driver->resume
- && is_usb_connected())
+ && is_vbus_present())
dev->driver->resume(&dev->gadget);
}
} else {
DBG(DBG_VERBOSE, "USB reset end\n");
dev->gadget.speed = USB_SPEED_FULL;
- LED_CONNECTED_ON;
memset(&dev->stats, 0, sizeof dev->stats);
/* driver and endpoints are still reset */
}
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.reg_udccs = &UDCCS1,
.reg_uddr = &UDDR1,
- drcmr (25)
},
.ep[2] = {
.ep = {
.reg_udccs = &UDCCS2,
.reg_ubcr = &UBCR2,
.reg_uddr = &UDDR2,
- drcmr (26)
},
#ifndef CONFIG_USB_PXA2XX_SMALL
.ep[3] = {
.bmAttributes = USB_ENDPOINT_XFER_ISOC,
.reg_udccs = &UDCCS3,
.reg_uddr = &UDDR3,
- drcmr (27)
},
.ep[4] = {
.ep = {
.reg_udccs = &UDCCS4,
.reg_ubcr = &UBCR4,
.reg_uddr = &UDDR4,
- drcmr (28)
},
.ep[5] = {
.ep = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.reg_udccs = &UDCCS6,
.reg_uddr = &UDDR6,
- drcmr (30)
},
.ep[7] = {
.ep = {
.reg_udccs = &UDCCS7,
.reg_ubcr = &UBCR7,
.reg_uddr = &UDDR7,
- drcmr (31)
},
.ep[8] = {
.ep = {
.bmAttributes = USB_ENDPOINT_XFER_ISOC,
.reg_udccs = &UDCCS8,
.reg_uddr = &UDDR8,
- drcmr (32)
},
.ep[9] = {
.ep = {
.reg_udccs = &UDCCS9,
.reg_ubcr = &UBCR9,
.reg_uddr = &UDDR9,
- drcmr (33)
},
.ep[10] = {
.ep = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.reg_udccs = &UDCCS11,
.reg_uddr = &UDDR11,
- drcmr (35)
},
.ep[12] = {
.ep = {
.reg_udccs = &UDCCS12,
.reg_ubcr = &UBCR12,
.reg_uddr = &UDDR12,
- drcmr (36)
},
.ep[13] = {
.ep = {
.bmAttributes = USB_ENDPOINT_XFER_ISOC,
.reg_udccs = &UDCCS13,
.reg_uddr = &UDDR13,
- drcmr (37)
},
.ep[14] = {
.ep = {
.reg_udccs = &UDCCS14,
.reg_ubcr = &UBCR14,
.reg_uddr = &UDDR14,
- drcmr (38)
},
.ep[15] = {
.ep = {
#define PXA210_B1 0x00000123
#define PXA210_B0 0x00000122
#define IXP425_A0 0x000001c1
+#define IXP425_B0 0x000001f1
+#define IXP465_AD 0x00000200
/*
- * probe - binds to the platform device
+ * probe - binds to the platform device
*/
-static int __init pxa2xx_udc_probe(struct device *_dev)
+static int __init pxa2xx_udc_probe(struct platform_device *pdev)
{
struct pxa2xx_udc *dev = &memory;
- int retval, out_dma = 1;
+ int retval, vbus_irq, irq;
u32 chiprev;
/* insist on Intel/ARM/XScale */
asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev));
if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) {
- printk(KERN_ERR "%s: not XScale!\n", driver_name);
+ pr_err("%s: not XScale!\n", driver_name);
return -ENODEV;
}
case PXA250_B2: case PXA210_B2:
case PXA250_B1: case PXA210_B1:
case PXA250_B0: case PXA210_B0:
- out_dma = 0;
+ /* OUT-DMA is broken ... */
/* fall through */
case PXA250_C0: case PXA210_C0:
break;
#elif defined(CONFIG_ARCH_IXP4XX)
case IXP425_A0:
- out_dma = 0;
+ case IXP425_B0:
+ case IXP465_AD:
+ dev->has_cfr = 1;
break;
#endif
default:
- out_dma = 0;
- printk(KERN_ERR "%s: unrecognized processor: %08x\n",
+ pr_err("%s: unrecognized processor: %08x\n",
driver_name, chiprev);
/* iop3xx, ixp4xx, ... */
return -ENODEV;
}
- pr_debug("%s: IRQ %d%s%s%s\n", driver_name, IRQ_USB,
- dev->has_cfr ? "" : " (!cfr)",
- out_dma ? "" : " (broken dma-out)",
- SIZE_STR DMASTR
- );
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
-#ifdef USE_DMA
-#ifndef USE_OUT_DMA
- out_dma = 0;
-#endif
- /* pxa 250 erratum 130 prevents using OUT dma (fixed C0) */
- if (!out_dma) {
- DMSG("disabled OUT dma\n");
- dev->ep[ 2].reg_drcmr = dev->ep[ 4].reg_drcmr = 0;
- dev->ep[ 7].reg_drcmr = dev->ep[ 9].reg_drcmr = 0;
- dev->ep[12].reg_drcmr = dev->ep[14].reg_drcmr = 0;
+#ifdef CONFIG_ARCH_PXA
+ dev->clk = clk_get(&pdev->dev, "UDCCLK");
+ if (IS_ERR(dev->clk)) {
+ retval = PTR_ERR(dev->clk);
+ goto err_clk;
}
#endif
+ pr_debug("%s: IRQ %d%s%s\n", driver_name, irq,
+ dev->has_cfr ? "" : " (!cfr)",
+ SIZE_STR "(pio)"
+ );
+
/* other non-static parts of init */
- dev->dev = _dev;
- dev->mach = _dev->platform_data;
+ dev->dev = &pdev->dev;
+ dev->mach = pdev->dev.platform_data;
+
+ if (dev->mach->gpio_vbus) {
+ if ((retval = gpio_request(dev->mach->gpio_vbus,
+ "pxa2xx_udc GPIO VBUS"))) {
+ dev_dbg(&pdev->dev,
+ "can't get vbus gpio %d, err: %d\n",
+ dev->mach->gpio_vbus, retval);
+ goto err_gpio_vbus;
+ }
+ gpio_direction_input(dev->mach->gpio_vbus);
+ vbus_irq = gpio_to_irq(dev->mach->gpio_vbus);
+ } else
+ vbus_irq = 0;
+
+ if (dev->mach->gpio_pullup) {
+ if ((retval = gpio_request(dev->mach->gpio_pullup,
+ "pca2xx_udc GPIO PULLUP"))) {
+ dev_dbg(&pdev->dev,
+ "can't get pullup gpio %d, err: %d\n",
+ dev->mach->gpio_pullup, retval);
+ goto err_gpio_pullup;
+ }
+ gpio_direction_output(dev->mach->gpio_pullup, 0);
+ }
init_timer(&dev->timer);
dev->timer.function = udc_watchdog;
dev->timer.data = (unsigned long) dev;
device_initialize(&dev->gadget.dev);
- dev->gadget.dev.parent = _dev;
- dev->gadget.dev.dma_mask = _dev->dma_mask;
+ dev->gadget.dev.parent = &pdev->dev;
+ dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
the_controller = dev;
- dev_set_drvdata(_dev, dev);
+ platform_set_drvdata(pdev, dev);
udc_disable(dev);
udc_reinit(dev);
- dev->vbus = is_usb_connected();
+ dev->vbus = is_vbus_present();
/* irq setup after old hardware state is cleaned up */
- retval = request_irq(IRQ_USB, pxa2xx_udc_irq,
- SA_INTERRUPT, driver_name, dev);
+ retval = request_irq(irq, pxa2xx_udc_irq,
+ IRQF_DISABLED, 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;
+ pr_err("%s: can't get irq %d, err %d\n",
+ driver_name, irq, retval);
+ goto err_irq1;
}
dev->got_irq = 1;
if (machine_is_lubbock()) {
retval = request_irq(LUBBOCK_USB_DISC_IRQ,
lubbock_vbus_irq,
- SA_INTERRUPT | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
driver_name, dev);
if (retval != 0) {
- printk(KERN_ERR "%s: can't get irq %i, err %d\n",
+ pr_err("%s: can't get irq %i, err %d\n",
driver_name, LUBBOCK_USB_DISC_IRQ, retval);
lubbock_fail0:
- free_irq(IRQ_USB, dev);
- return -EBUSY;
+ goto err_irq_lub;
}
retval = request_irq(LUBBOCK_USB_IRQ,
lubbock_vbus_irq,
- SA_INTERRUPT | SA_SAMPLE_RANDOM,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
driver_name, dev);
if (retval != 0) {
- printk(KERN_ERR "%s: can't get irq %i, err %d\n",
+ pr_err("%s: can't get irq %i, err %d\n",
driver_name, LUBBOCK_USB_IRQ, retval);
free_irq(LUBBOCK_USB_DISC_IRQ, dev);
goto lubbock_fail0;
}
-#ifdef DEBUG
- /* with U-Boot (but not BLOB), hex is off by default */
- HEX_DISPLAY(dev->stats.irqs);
- LUB_DISC_BLNK_LED &= 0xff;
+ } else
#endif
+ if (vbus_irq) {
+ retval = request_irq(vbus_irq, udc_vbus_irq,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM |
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ driver_name, dev);
+ if (retval != 0) {
+ pr_err("%s: can't get irq %i, err %d\n",
+ driver_name, vbus_irq, retval);
+ goto err_vbus_irq;
+ }
}
-#endif
create_proc_files();
return 0;
+
+ err_vbus_irq:
+#ifdef CONFIG_ARCH_LUBBOCK
+ free_irq(LUBBOCK_USB_DISC_IRQ, dev);
+ err_irq_lub:
+#endif
+ free_irq(irq, dev);
+ err_irq1:
+ if (dev->mach->gpio_pullup)
+ gpio_free(dev->mach->gpio_pullup);
+ err_gpio_pullup:
+ if (dev->mach->gpio_vbus)
+ gpio_free(dev->mach->gpio_vbus);
+ err_gpio_vbus:
+#ifdef CONFIG_ARCH_PXA
+ clk_put(dev->clk);
+ err_clk:
+#endif
+ return retval;
+}
+
+static void pxa2xx_udc_shutdown(struct platform_device *_dev)
+{
+ pullup_off();
}
-static int __exit pxa2xx_udc_remove(struct device *_dev)
+
+static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
{
- struct pxa2xx_udc *dev = dev_get_drvdata(_dev);
+ struct pxa2xx_udc *dev = platform_get_drvdata(pdev);
+
+ if (dev->driver)
+ return -EBUSY;
udc_disable(dev);
remove_proc_files();
- usb_gadget_unregister_driver(dev->driver);
if (dev->got_irq) {
- free_irq(IRQ_USB, dev);
+ free_irq(platform_get_irq(pdev, 0), dev);
dev->got_irq = 0;
}
+#ifdef CONFIG_ARCH_LUBBOCK
if (machine_is_lubbock()) {
free_irq(LUBBOCK_USB_DISC_IRQ, dev);
free_irq(LUBBOCK_USB_IRQ, dev);
}
- dev_set_drvdata(_dev, NULL);
+#endif
+ if (dev->mach->gpio_vbus) {
+ free_irq(gpio_to_irq(dev->mach->gpio_vbus), dev);
+ gpio_free(dev->mach->gpio_vbus);
+ }
+ if (dev->mach->gpio_pullup)
+ gpio_free(dev->mach->gpio_pullup);
+
+#ifdef CONFIG_ARCH_PXA
+ clk_put(dev->clk);
+#endif
+
+ platform_set_drvdata(pdev, NULL);
the_controller = NULL;
return 0;
}
*
* For now, we punt and forcibly disconnect from the USB host when PXA
* enters any suspend state. While we're disconnected, we always disable
- * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
+ * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
* Boards without software pullup control shouldn't use those states.
* VBUS IRQs should probably be ignored so that the PXA device just acts
* "dead" to USB hosts until system resume.
*/
-static int pxa2xx_udc_suspend(struct device *dev, u32 state, u32 level)
+static int pxa2xx_udc_suspend(struct platform_device *dev, pm_message_t state)
{
- struct pxa2xx_udc *udc = dev_get_drvdata(dev);
+ struct pxa2xx_udc *udc = platform_get_drvdata(dev);
+
+ if (!udc->mach->gpio_pullup && !udc->mach->udc_command)
+ WARN("USB host won't detect disconnect!\n");
+ pullup(udc, 0);
- if (level == SUSPEND_POWER_DOWN) {
- if (!udc->mach->udc_command)
- WARN("USB host won't detect disconnect!\n");
- pullup(udc, 0);
- }
return 0;
}
-static int pxa2xx_udc_resume(struct device *dev, u32 level)
+static int pxa2xx_udc_resume(struct platform_device *dev)
{
- struct pxa2xx_udc *udc = dev_get_drvdata(dev);
+ struct pxa2xx_udc *udc = platform_get_drvdata(dev);
+
+ pullup(udc, 1);
- if (level == RESUME_POWER_ON)
- pullup(udc, 1);
return 0;
}
/*-------------------------------------------------------------------------*/
-static struct device_driver udc_driver = {
- .name = "pxa2xx-udc",
- .bus = &platform_bus_type,
- .probe = pxa2xx_udc_probe,
+static struct platform_driver udc_driver = {
+ .shutdown = pxa2xx_udc_shutdown,
.remove = __exit_p(pxa2xx_udc_remove),
.suspend = pxa2xx_udc_suspend,
.resume = pxa2xx_udc_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "pxa2xx-udc",
+ },
};
static int __init udc_init(void)
{
- printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
- return driver_register(&udc_driver);
+ pr_info("%s: version %s\n", driver_name, DRIVER_VERSION);
+ return platform_driver_probe(&udc_driver, pxa2xx_udc_probe);
}
module_init(udc_init);
static void __exit udc_exit(void)
{
- driver_unregister(&udc_driver);
+ platform_driver_unregister(&udc_driver);
}
module_exit(udc_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff