1 files changed, 90 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/83xx/usb_834x.c b/arch/powerpc/platforms/83xx/usb_834x.c
new file mode 100644
index 000000000000..3a8d6c662d06
--- /dev/null
+++ b/arch/powerpc/platforms/83xx/usb_834x.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Freescale 83xx USB SOC setup code
+ *
+ * Copyright (C) 2007 Freescale Semiconductor, Inc.
+ * Author: Li Yang
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include <sysdev/fsl_soc.h>
+
+#include "mpc83xx.h"
+
+int __init mpc834x_usb_cfg(void)
+{
+	unsigned long sccr, sicrl, sicrh;
+	void __iomem *immap;
+	struct device_node *np = NULL;
+	int port0_is_dr = 0, port1_is_dr = 0;
+	const void *prop, *dr_mode;
+
+	immap = ioremap(get_immrbase(), 0x1000);
+	if (!immap)
+		return -ENOMEM;
+
+	/* Read registers */
+	/* Note: DR and MPH must use the same clock setting in SCCR */
+	sccr = in_be32(immap + MPC83XX_SCCR_OFFS) & ~MPC83XX_SCCR_USB_MASK;
+	sicrl = in_be32(immap + MPC83XX_SICRL_OFFS) & ~MPC834X_SICRL_USB_MASK;
+	sicrh = in_be32(immap + MPC83XX_SICRH_OFFS) & ~MPC834X_SICRH_USB_UTMI;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
+	if (np) {
+		sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */
+
+		prop = of_get_property(np, "phy_type", NULL);
+		port1_is_dr = 1;
+		if (prop &&
+		    (!strcmp(prop, "utmi") || !strcmp(prop, "utmi_wide"))) {
+			sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
+			sicrh |= MPC834X_SICRH_USB_UTMI;
+			port0_is_dr = 1;
+		} else if (prop && !strcmp(prop, "serial")) {
+			dr_mode = of_get_property(np, "dr_mode", NULL);
+			if (dr_mode && !strcmp(dr_mode, "otg")) {
+				sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
+				port0_is_dr = 1;
+			} else {
+				sicrl |= MPC834X_SICRL_USB1;
+			}
+		} else if (prop && !strcmp(prop, "ulpi")) {
+			sicrl |= MPC834X_SICRL_USB1;
+		} else {
+			pr_warn("834x USB PHY type not supported\n");
+		}
+		of_node_put(np);
+	}
+	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-mph");
+	if (np) {
+		sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
+
+		prop = of_get_property(np, "port0", NULL);
+		if (prop) {
+			if (port0_is_dr)
+				pr_warn("834x USB port0 can't be used by both DR and MPH!\n");
+			sicrl &= ~MPC834X_SICRL_USB0;
+		}
+		prop = of_get_property(np, "port1", NULL);
+		if (prop) {
+			if (port1_is_dr)
+				pr_warn("834x USB port1 can't be used by both DR and MPH!\n");
+			sicrl &= ~MPC834X_SICRL_USB1;
+		}
+		of_node_put(np);
+	}
+
+	/* Write back */
+	out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
+	out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
+	out_be32(immap + MPC83XX_SICRH_OFFS, sicrh);
+
+	iounmap(immap);
+	return 0;
+}