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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 7/9] pcm038: Stop ongoing ULPI transfers before registering the transceiver
Date: Thu, 13 Dec 2012 18:00:42 +0100	[thread overview]
Message-ID: <1355418044-27452-8-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1355418044-27452-1-git-send-email-s.hauer@pengutronix.de>

The ULPI lines are normally input to the USB port. In order to configure
the ULPI transceiver properly the ongoing transfers must be stopped. This
can be done by configuring the the STP pin as gpio output and drinving
it high.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/boards/pcm038/pcm970.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boards/pcm038/pcm970.c b/arch/arm/boards/pcm038/pcm970.c
index 7b25110..a50a1f2 100644
--- a/arch/arm/boards/pcm038/pcm970.c
+++ b/arch/arm/boards/pcm038/pcm970.c
@@ -160,7 +160,7 @@ static int pcm970_init(void)
 		PA1_PF_USBH2_DIR,
 		PA2_PF_USBH2_DATA7,
 		PA3_PF_USBH2_NXT,
-		PA4_PF_USBH2_STP,
+		4 | GPIO_PORTA | GPIO_GPIO | GPIO_OUT,
 		PD19_AF_USBH2_DATA4,
 		PD20_AF_USBH2_DATA3,
 		PD21_AF_USBH2_DATA6,
@@ -176,8 +176,14 @@ static int pcm970_init(void)
 	/* Configure SJA1000 on cs4 */
 	imx27_setup_weimcs(4, 0x0000DCF6, 0x444A0301, 0x44443302);
 
-	if (IS_ENABLED(CONFIG_USB))
+	if (IS_ENABLED(CONFIG_USB)) {
+		/* Stop ULPI */
+		gpio_direction_output(4, 1);
+		mdelay(1);
+		imx_gpio_mode(PA4_PF_USBH2_STP);
+
 		imx27_add_usbh2(&pcm970_usbh2_pdata);
+	}
 
 #ifdef CONFIG_DISK_INTF_PLATFORM_IDE
 	pcm970_ide_init();
-- 
1.7.10.4


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  parent reply	other threads:[~2012-12-13 17:00 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-13 17:00 [PATCH] i.MX chipidea support Sascha Hauer
2012-12-13 17:00 ` [PATCH 1/9] USB ehci: Allow to register independently from device Sascha Hauer
2012-12-13 17:00 ` [PATCH 2/9] USB i.MX: Add chipidea driver support Sascha Hauer
2012-12-13 17:00 ` [PATCH 3/9] ARM i.MX27: Add USB device functions Sascha Hauer
2012-12-13 17:00 ` [PATCH 4/9] ARM i.MX51: " Sascha Hauer
2012-12-13 17:00 ` [PATCH 5/9] ARM i.MX31: " Sascha Hauer
2012-12-13 17:00 ` [PATCH 6/9] ARM i.MX pcm038: switch to chipidea support Sascha Hauer
2012-12-13 17:00 ` Sascha Hauer [this message]
2012-12-13 17:00 ` [PATCH 8/9] fixup! USB i.MX: Add chipidea driver support Sascha Hauer
2012-12-13 17:00 ` [PATCH 9/9] ARM i.MX pcm038: Update defconfig for chipidea driver Sascha Hauer

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