From: Christian Lamparter <chunkeey@googlemail.com>
Date: Mon, 6 Dec 2010 12:22:42 +0000 (+0100)
Subject: carl9170 firmware: reset PTA-DMA registers before reboot
X-Git-Tag: 1.9.2~10
X-Git-Url: https://jxself.org/git/?p=carl9170fw.git;a=commitdiff_plain;h=e8448cf14674dafd86899f191475ea54b151d08a

carl9170 firmware: reset PTA-DMA registers before reboot

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
---

diff --git a/carlfw/usb/main.c b/carlfw/usb/main.c
index 6545ec0..48ece0e 100644
--- a/carlfw/usb/main.c
+++ b/carlfw/usb/main.c
@@ -224,6 +224,17 @@ static void turn_power_off(void)
 
 	set(AR9170_MAC_REG_DMA_TRIGGER, 0);
 
+	andl(AR9170_USB_REG_DMA_CTL, ~(AR9170_USB_DMA_CTL_ENABLE_TO_DEVICE |
+				       AR9170_USB_DMA_CTL_ENABLE_FROM_DEVICE |
+				       AR9170_USB_DMA_CTL_UP_PACKET_MODE |
+				       AR9170_USB_DMA_CTL_DOWN_STREAM));
+
+	/* Do a software reset to PTA component */
+	orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_RESET);
+	andl(AR9170_PTA_REG_DMA_MODE_CTRL, ~AR9170_PTA_DMA_MODE_CTRL_RESET);
+
+	orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_DISABLE_USB);
+
 	set(AR9170_MAC_REG_POWER_STATE_CTRL,
 	    AR9170_MAC_POWER_STATE_CTRL_RESET);
 
@@ -272,8 +283,6 @@ static void turn_power_off(void)
 
 void __noreturn reboot(void)
 {
-	set(AR9170_MAC_REG_DMA_TRIGGER, 0);
-
 	/* write watchdog magic pattern for suspend  */
 	andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xffff);
 	orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x98760000);