[PATCH] usb gadget: update pxa2xx_udc.c driver to fully support IXP4xx platform

This patch adds IXP465 into the list of known devices and
adds IXP425 and IXP465 to the list of devices that have cfr. This
is not described in the hardware documentation, but without
it driver won't work.

Workaround (#if 1) that seemed to get rid of lost
status irqs is disabled for IXP4XX as it caused freezes
during testing of control messages. No lost irqs are
visible on IXP4XX.

Driver survived tests running over night without any
visible problems.

Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c
index af63d82..269ce7f 100644 (file)
--- a/drivers/usb/gadget/pxa2xx_udc.c
+++ b/drivers/usb/gadget/pxa2xx_udc.c
@@ -60,7 +60,7 @@
 #include <linux/usb_ch9.h>
 #include <linux/usb_gadget.h>
 
-#include <asm/arch/udc.h>
+#include <asm/arch/hardware/intel_udc.h>
 
 
 /*
@@ -547,6 +547,7 @@ write_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
                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
@@ -566,6 +567,7 @@ write_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req)
                                udelay(1);
                        } while (count);
                }
+#endif
 #endif
        } else if (ep->dev->req_pending)
                ep0start(ep->dev, 0, "IN");
@@ -2429,6 +2431,7 @@ static struct pxa2xx_udc memory = {
 #define PXA210_B1              0x00000123
 #define PXA210_B0              0x00000122
 #define IXP425_A0              0x000001c1
+#define IXP465_AD              0x00000200
 
 /*
  *     probe - binds to the platform device
@@ -2465,6 +2468,8 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
                break;
 #elif  defined(CONFIG_ARCH_IXP4XX)
        case IXP425_A0:
+       case IXP465_AD:
+               dev->has_cfr = 1;
                out_dma = 0;
                break;
 #endif