8 files changed, 51 insertions, 58 deletions

diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index c3577bbbae6c..ef2332a9941d 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -1442,11 +1442,6 @@ static int cppi_channel_abort(struct dma_channel *channel)
                 musb_writew(regs, MUSB_TXCSR, value);
                 musb_writew(regs, MUSB_TXCSR, value);
 
-                /* re-enable interrupt */
-                if (enabled)
-                        musb_writel(tibase, DAVINCI_TXCPPI_INTENAB_REG,
-                                        (1 << cppi_ch->index));
-
                 /* While we scrub the TX state RAM, ensure that we clean
                  * up any interrupt that's currently asserted:
                  * 1. Write to completion Ptr value 0x1(bit 0 set)
@@ -1459,6 +1454,11 @@ static int cppi_channel_abort(struct dma_channel *channel)
                 cppi_reset_tx(tx_ram, 1);
                 musb_writel(&tx_ram->tx_complete, 0, 0);
 
+                /* re-enable interrupt */
+                if (enabled)
+                        musb_writel(tibase, DAVINCI_TXCPPI_INTENAB_REG,
+                                        (1 << cppi_ch->index));
+
                 cppi_dump_tx(5, cppi_ch, " (done teardown)");
 
                 /* REVISIT tx side _should_ clean up the same way
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 3a61ddb62bd2..547e0e390726 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1450,7 +1450,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 #endif
 
                 if (hw_ep->max_packet_sz_tx) {
-                        printk(KERN_DEBUG
+                        DBG(1,
                                 "%s: hw_ep %d%s, %smax %d\n",
                                 musb_driver_name, i,
                                 hw_ep->is_shared_fifo ? "shared" : "tx",
@@ -1459,7 +1459,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
                                 hw_ep->max_packet_sz_tx);
                 }
                 if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
-                        printk(KERN_DEBUG
+                        DBG(1,
                                 "%s: hw_ep %d%s, %smax %d\n",
                                 musb_driver_name, i,
                                 "rx",
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 8b3c4e2ed7b8..74073f9a43f0 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -4,6 +4,7 @@
  * Copyright 2005 Mentor Graphics Corporation
  * Copyright (C) 2005-2006 by Texas Instruments
  * Copyright (C) 2006-2007 Nokia Corporation
+ * Copyright (C) 2009 MontaVista Software, Inc. <source@mvista.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -436,14 +437,6 @@ void musb_g_tx(struct musb *musb, u8 epnum)
                         csr |= MUSB_TXCSR_P_WZC_BITS;
                         csr &= ~MUSB_TXCSR_P_SENTSTALL;
                         musb_writew(epio, MUSB_TXCSR, csr);
-                        if (dma_channel_status(dma) == MUSB_DMA_STATUS_BUSY) {
-                                dma->status = MUSB_DMA_STATUS_CORE_ABORT;
-                                musb->dma_controller->channel_abort(dma);
-                        }
-
-                        if (request)
-                                musb_g_giveback(musb_ep, request, -EPIPE);
-
                         break;
                 }
 
@@ -582,15 +575,25 @@ void musb_g_tx(struct musb *musb, u8 epnum)
  */
 static void rxstate(struct musb *musb, struct musb_request *req)
 {
-        u16                     csr = 0;
         const u8                epnum = req->epnum;
         struct usb_request      *request = &req->request;
         struct musb_ep          *musb_ep = &musb->endpoints[epnum].ep_out;
         void __iomem            *epio = musb->endpoints[epnum].regs;
         unsigned                fifo_count = 0;
         u16                     len = musb_ep->packet_sz;
+        u16                     csr = musb_readw(epio, MUSB_RXCSR);
 
-        csr = musb_readw(epio, MUSB_RXCSR);
+        /* We shouldn't get here while DMA is active, but we do... */
+        if (dma_channel_status(musb_ep->dma) == MUSB_DMA_STATUS_BUSY) {
+                DBG(4, "DMA pending...\n");
+                return;
+        }
+
+        if (csr & MUSB_RXCSR_P_SENDSTALL) {
+                DBG(5, "%s stalling, RXCSR %04x\n",
+                    musb_ep->end_point.name, csr);
+                return;
+        }
 
         if (is_cppi_enabled() && musb_ep->dma) {
                 struct dma_controller   *c = musb->dma_controller;
@@ -761,19 +764,10 @@ void musb_g_rx(struct musb *musb, u8 epnum)
                         csr, dma ? " (dma)" : "", request);
 
         if (csr & MUSB_RXCSR_P_SENTSTALL) {
-                if (dma_channel_status(dma) == MUSB_DMA_STATUS_BUSY) {
-                        dma->status = MUSB_DMA_STATUS_CORE_ABORT;
-                        (void) musb->dma_controller->channel_abort(dma);
-                        request->actual += musb_ep->dma->actual_len;
-                }
-
                 csr |= MUSB_RXCSR_P_WZC_BITS;
                 csr &= ~MUSB_RXCSR_P_SENTSTALL;
                 musb_writew(epio, MUSB_RXCSR, csr);
-
-                if (request)
-                        musb_g_giveback(musb_ep, request, -EPIPE);
-                goto done;
+                return;
         }
 
         if (csr & MUSB_RXCSR_P_OVERRUN) {
@@ -795,7 +789,7 @@ void musb_g_rx(struct musb *musb, u8 epnum)
                 DBG((csr & MUSB_RXCSR_DMAENAB) ? 4 : 1,
                         "%s busy, csr %04x\n",
                         musb_ep->end_point.name, csr);
-                goto done;
+                return;
         }
 
         if (dma && (csr & MUSB_RXCSR_DMAENAB)) {
@@ -826,22 +820,15 @@ void musb_g_rx(struct musb *musb, u8 epnum)
                 if ((request->actual < request->length)
                                 && (musb_ep->dma->actual_len
                                         == musb_ep->packet_sz))
-                        goto done;
+                        return;
 #endif
                 musb_g_giveback(musb_ep, request, 0);
 
                 request = next_request(musb_ep);
                 if (!request)
-                        goto done;
-
-                /* don't start more i/o till the stall clears */
-                musb_ep_select(mbase, epnum);
-                csr = musb_readw(epio, MUSB_RXCSR);
-                if (csr & MUSB_RXCSR_P_SENDSTALL)
-                        goto done;
+                        return;
         }
 
-
         /* analyze request if the ep is hot */
         if (request)
                 rxstate(musb, to_musb_request(request));
@@ -849,8 +836,6 @@ void musb_g_rx(struct musb *musb, u8 epnum)
                 DBG(3, "packet waiting for %s%s request\n",
                                 musb_ep->desc ? "" : "inactive ",
                                 musb_ep->end_point.name);
-
-done:
         return;
 }
 
@@ -1244,7 +1229,7 @@ int musb_gadget_set_halt(struct usb_ep *ep, int value)
         void __iomem            *mbase;
         unsigned long           flags;
         u16                     csr;
-        struct musb_request     *request = NULL;
+        struct musb_request     *request;
         int                     status = 0;
 
         if (!ep)
@@ -1260,24 +1245,29 @@ int musb_gadget_set_halt(struct usb_ep *ep, int value)
 
         musb_ep_select(mbase, epnum);
 
-        /* cannot portably stall with non-empty FIFO */
         request = to_musb_request(next_request(musb_ep));
-        if (value && musb_ep->is_in) {
-                csr = musb_readw(epio, MUSB_TXCSR);
-                if (csr & MUSB_TXCSR_FIFONOTEMPTY) {
-                        DBG(3, "%s fifo busy, cannot halt\n", ep->name);
-                        spin_unlock_irqrestore(&musb->lock, flags);
-                        return -EAGAIN;
+        if (value) {
+                if (request) {
+                        DBG(3, "request in progress, cannot halt %s\n",
+                            ep->name);
+                        status = -EAGAIN;
+                        goto done;
+                }
+                /* Cannot portably stall with non-empty FIFO */
+                if (musb_ep->is_in) {
+                        csr = musb_readw(epio, MUSB_TXCSR);
+                        if (csr & MUSB_TXCSR_FIFONOTEMPTY) {
+                                DBG(3, "FIFO busy, cannot halt %s\n", ep->name);
+                                status = -EAGAIN;
+                                goto done;
+                        }
                 }
-
         }
 
         /* set/clear the stall and toggle bits */
         DBG(2, "%s: %s stall\n", ep->name, value ? "set" : "clear");
         if (musb_ep->is_in) {
                 csr = musb_readw(epio, MUSB_TXCSR);
-                if (csr & MUSB_TXCSR_FIFONOTEMPTY)
-                        csr |= MUSB_TXCSR_FLUSHFIFO;
                 csr |= MUSB_TXCSR_P_WZC_BITS
                         | MUSB_TXCSR_CLRDATATOG;
                 if (value)
@@ -1300,14 +1290,13 @@ int musb_gadget_set_halt(struct usb_ep *ep, int value)
                 musb_writew(epio, MUSB_RXCSR, csr);
         }
 
-done:
-
         /* maybe start the first request in the queue */
         if (!musb_ep->busy && !value && request) {
                 DBG(3, "restarting the request\n");
                 musb_ep_restart(musb, request);
         }
 
+done:
         spin_unlock_irqrestore(&musb->lock, flags);
         return status;
 }
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
index 7a6778675ad3..522efb31b56b 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -511,7 +511,8 @@ static void ep0_txstate(struct musb *musb)
 
         /* update the flags */
         if (fifo_count < MUSB_MAX_END0_PACKET
-                        || request->actual == request->length) {
+                        || (request->actual == request->length
+                                && !request->zero)) {
                 musb->ep0_state = MUSB_EP0_STAGE_STATUSOUT;
                 csr |= MUSB_CSR0_P_DATAEND;
         } else
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index cf94511485f2..e3ab40a966eb 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1301,8 +1301,11 @@ void musb_host_tx(struct musb *musb, u8 epnum)
                 return;
         } else  if (usb_pipeisoc(pipe) && dma) {
                 if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
-                                offset, length))
+                                offset, length)) {
+                        if (is_cppi_enabled() || tusb_dma_omap())
+                                musb_h_tx_dma_start(hw_ep);
                         return;
+                }
         } else  if (tx_csr & MUSB_TXCSR_DMAENAB) {
                 DBG(1, "not complete, but DMA enabled?\n");
                 return;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 34875201ee04..6761d2088db8 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -35,7 +35,7 @@
 
 #include <asm/mach-types.h>
 #include <mach/hardware.h>
-#include <mach/mux.h>
+#include <plat/mux.h>
 
 #include "musb_core.h"
 #include "omap2430.h"
diff --git a/drivers/usb/musb/omap2430.h b/drivers/usb/musb/omap2430.h
index dc7670718cd2..fbede7798aed 100644
--- a/drivers/usb/musb/omap2430.h
+++ b/drivers/usb/musb/omap2430.h
@@ -12,7 +12,7 @@
 
 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
 #include <mach/hardware.h>
-#include <mach/usb.h>
+#include <plat/usb.h>
 
 /*
  * OMAP2430-specific definitions
diff --git a/drivers/usb/musb/tusb6010_omap.c b/drivers/usb/musb/tusb6010_omap.c
index 7e073a0d7ac9..e13c77052e5e 100644
--- a/drivers/usb/musb/tusb6010_omap.c
+++ b/drivers/usb/musb/tusb6010_omap.c
@@ -15,8 +15,8 @@
 #include <linux/usb.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
-#include <mach/dma.h>
-#include <mach/mux.h>
+#include <plat/dma.h>
+#include <plat/mux.h>
 
 #include "musb_core.h"