[U-Boot-Users] [PATCH] PXA USB OHCI: "usb stop" implementation.

[Rodolfo Giometti]

Some USB keys need to be switched off before loading the kernel
otherwise they can remain in an undefined status which prevents them
to be correctly recognized by the kernel.

Signed-off-by: Rodolfo Giometti <giometti at linux.it>
---
 cpu/pxa/usb.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/cpu/pxa/usb.c b/cpu/pxa/usb.c
index 65f457f..3c11d4d 100644
--- a/cpu/pxa/usb.c
+++ b/cpu/pxa/usb.c
@@ -67,6 +67,22 @@ int usb_cpu_init()
 
 int usb_cpu_stop()
 {
+	UHCHR |= UHCHR_FHR;
+	udelay(11);
+	UHCHR &= ~UHCHR_FHR;
+
+	UHCCOMS |= 1;
+	udelay(10);
+
+#if defined(CONFIG_CPU_MONAHANS)
+	UHCHR |= UHCHR_SSEP0;
+#endif
+#if defined(CONFIG_PXA27X)
+	UHCHR |= UHCHR_SSEP2;
+#endif
+	UHCHR |= UHCHR_SSEP1;
+	UHCHR |= UHCHR_SSE;
+
 	return 0;
 }
 
-- 
1.5.2.5


-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127