Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 134 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/rcar3.c b/drivers/usb/renesas_usbhs/rcar3.c
new file mode 100644
index 000000000..d0ea4ff89
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/rcar3.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas USB driver R-Car Gen. 3 initialization and power control
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include "common.h"
+#include "rcar3.h"
+
+#define LPSTS		0x102
+#define UGCTRL		0x180	/* 32-bit register */
+#define UGCTRL2		0x184	/* 32-bit register */
+#define UGSTS		0x188	/* 32-bit register */
+
+/* Low Power Status register (LPSTS) */
+#define LPSTS_SUSPM	0x4000
+
+/* R-Car D3 only: USB General control register (UGCTRL) */
+#define UGCTRL_PLLRESET		0x00000001
+#define UGCTRL_CONNECT		0x00000004
+
+/*
+ * USB General control register 2 (UGCTRL2)
+ * Remarks: bit[31:11] and bit[9:6] should be 0
+ */
+#define UGCTRL2_RESERVED_3	0x00000001	/* bit[3:0] should be B'0001 */
+#define UGCTRL2_USB0SEL_EHCI	0x00000010
+#define UGCTRL2_USB0SEL_HSUSB	0x00000020
+#define UGCTRL2_USB0SEL_OTG	0x00000030
+#define UGCTRL2_VBUSSEL		0x00000400
+
+/* R-Car D3 only: USB General status register (UGSTS) */
+#define UGSTS_LOCK		0x00000100
+
+static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
+{
+	iowrite32(data, priv->base + reg);
+}
+
+static u32 usbhs_read32(struct usbhs_priv *priv, u32 reg)
+{
+	return ioread32(priv->base + reg);
+}
+
+static void usbhs_rcar3_set_ugctrl2(struct usbhs_priv *priv, u32 val)
+{
+	usbhs_write32(priv, UGCTRL2, val | UGCTRL2_RESERVED_3);
+}
+
+static void usbhs_rcar3_set_usbsel(struct usbhs_priv *priv, bool ehci)
+{
+	if (ehci)
+		usbhs_rcar3_set_ugctrl2(priv, UGCTRL2_USB0SEL_EHCI);
+	else
+		usbhs_rcar3_set_ugctrl2(priv, UGCTRL2_USB0SEL_HSUSB);
+}
+
+static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
+				void __iomem *base, int enable)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+
+	usbhs_rcar3_set_ugctrl2(priv, UGCTRL2_USB0SEL_OTG | UGCTRL2_VBUSSEL);
+
+	if (enable) {
+		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
+		/* The controller on R-Car Gen3 needs to wait up to 45 usec */
+		udelay(45);
+	} else {
+		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
+	}
+
+	return 0;
+}
+
+/* R-Car D3 needs to release UGCTRL.PLLRESET */
+static int usbhs_rcar3_power_and_pll_ctrl(struct platform_device *pdev,
+					  void __iomem *base, int enable)
+{
+	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+	u32 val;
+	int timeout = 1000;
+	bool is_host = false;
+
+	if (enable) {
+		usbhs_write32(priv, UGCTRL, 0);	/* release PLLRESET */
+		if (priv->edev)
+			is_host = extcon_get_state(priv->edev, EXTCON_USB_HOST);
+
+		usbhs_rcar3_set_usbsel(priv, is_host);
+
+		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
+		do {
+			val = usbhs_read32(priv, UGSTS);
+			udelay(1);
+		} while (!(val & UGSTS_LOCK) && timeout--);
+		usbhs_write32(priv, UGCTRL, UGCTRL_CONNECT);
+	} else {
+		usbhs_write32(priv, UGCTRL, 0);
+		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
+		usbhs_write32(priv, UGCTRL, UGCTRL_PLLRESET);
+	}
+
+	return 0;
+}
+
+static int usbhs_rcar3_get_id(struct platform_device *pdev)
+{
+	return USBHS_GADGET;
+}
+
+static int usbhs_rcar3_notifier(struct notifier_block *nb, unsigned long event,
+				void *data)
+{
+	struct usbhs_priv *priv = container_of(nb, struct usbhs_priv, nb);
+
+	usbhs_rcar3_set_usbsel(priv, !!event);
+
+	return NOTIFY_DONE;
+}
+
+const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {
+	.power_ctrl = usbhs_rcar3_power_ctrl,
+	.get_id = usbhs_rcar3_get_id,
+};
+
+const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops = {
+	.power_ctrl = usbhs_rcar3_power_and_pll_ctrl,
+	.get_id = usbhs_rcar3_get_id,
+	.notifier = usbhs_rcar3_notifier,
+};