From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 roms/u-boot/arch/arm/mach-at91/phy.c | 57 ++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 roms/u-boot/arch/arm/mach-at91/phy.c

(limited to 'roms/u-boot/arch/arm/mach-at91/phy.c')

diff --git a/roms/u-boot/arch/arm/mach-at91/phy.c b/roms/u-boot/arch/arm/mach-at91/phy.c
new file mode 100644
index 000000000..6101eee35
--- /dev/null
+++ b/roms/u-boot/arch/arm/mach-at91/phy.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * (C) Copyright 2012
+ * Markus Hubig <mhubig@imko.de>
+ * IMKO GmbH <www.imko.de>
+ *
+ * Copyright (C) 2013 DENX Software Engineering, hs@denx.de
+ */
+
+#include <common.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/sizes.h>
+#include <asm/arch/at91_rstc.h>
+#include <watchdog.h>
+
+void at91_phy_reset(void)
+{
+	unsigned long erstl;
+	unsigned long start = get_timer(0);
+	unsigned long const timeout = 1000; /* 1000ms */
+	at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
+
+	erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
+
+	/*
+	 * Need to reset PHY -> 500ms reset
+	 * Reset PHY by pulling the NRST line for 500ms to low. To do so
+	 * disable user reset for low level on NRST pin and poll the NRST
+	 * level in reset status register.
+	 */
+	writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(0x0D) |
+		AT91_RSTC_MR_URSTEN, &rstc->mr);
+
+	writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr);
+
+	/* Wait for end of hardware reset */
+	while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL)) {
+		/* avoid shutdown by watchdog */
+		WATCHDOG_RESET();
+		mdelay(10);
+
+		/* timeout for not getting stuck in an endless loop */
+		if (get_timer(start) >= timeout) {
+			puts("*** ERROR: Timeout waiting for PHY reset!\n");
+			break;
+		}
+	};
+
+	/* Restore NRST value */
+	writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN, &rstc->mr);
+}
-- 
cgit 1.2.3-korg