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From 2c5234135015cd090d5a440bf9fca2c7142c2b6c Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Tue, 3 Oct 2017 20:09:14 +0900
Subject: [PATCH 0237/1795] usb: renesas_usbhs: add support for R-Car D3
This patch adds support for R-Car D3. This SoC needs to release
the PLL reset by the UGCTRL register. So, since this is not the same
as other R-Car Gen3 SoCs, this patch adds a new type as
"USBHS_TYPE_RCAR_GEN3_WITH_PLL".
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
(cherry picked from commit 0f38672c629b79fa2b929d2c391bc063a08279eb)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
.../devicetree/bindings/usb/renesas_usbhs.txt | 1 +
drivers/usb/renesas_usbhs/common.c | 10 +++-
drivers/usb/renesas_usbhs/rcar3.c | 48 +++++++++++++++++++
drivers/usb/renesas_usbhs/rcar3.h | 1 +
include/linux/usb/renesas_usbhs.h | 5 +-
5 files changed, 62 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
index 9e18e000339e..e79f6e43061a 100644
--- a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
+++ b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
@@ -10,6 +10,7 @@ Required properties:
- "renesas,usbhs-r8a7794" for r8a7794 (R-Car E2) compatible device
- "renesas,usbhs-r8a7795" for r8a7795 (R-Car H3) compatible device
- "renesas,usbhs-r8a7796" for r8a7796 (R-Car M3-W) compatible device
+ - "renesas,usbhs-r8a77995" for r8a77995 (R-Car D3) compatible device
- "renesas,rcar-gen2-usbhs" for R-Car Gen2 compatible device
- "renesas,rcar-gen3-usbhs" for R-Car Gen3 compatible device
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 8392de20cac1..c0dcb1b1a37d 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -486,6 +486,10 @@ static const struct of_device_id usbhs_of_match[] = {
.compatible = "renesas,usbhs-r8a7796",
.data = (void *)USBHS_TYPE_RCAR_GEN3,
},
+ {
+ .compatible = "renesas,usbhs-r8a77995",
+ .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
+ },
{
.compatible = "renesas,rcar-gen2-usbhs",
.data = (void *)USBHS_TYPE_RCAR_GEN2,
@@ -520,7 +524,8 @@ static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
dparam->enable_gpio = gpio;
if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
- dparam->type == USBHS_TYPE_RCAR_GEN3) {
+ dparam->type == USBHS_TYPE_RCAR_GEN3 ||
+ dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) {
dparam->has_usb_dmac = 1;
dparam->pipe_configs = usbhsc_new_pipe;
dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
@@ -585,6 +590,9 @@ static int usbhs_probe(struct platform_device *pdev)
case USBHS_TYPE_RCAR_GEN3:
priv->pfunc = usbhs_rcar3_ops;
break;
+ case USBHS_TYPE_RCAR_GEN3_WITH_PLL:
+ priv->pfunc = usbhs_rcar3_with_pll_ops;
+ break;
default:
if (!info->platform_callback.get_id) {
dev_err(&pdev->dev, "no platform callbacks");
diff --git a/drivers/usb/renesas_usbhs/rcar3.c b/drivers/usb/renesas_usbhs/rcar3.c
index 0857d0d0abcd..11a13887a71d 100644
--- a/drivers/usb/renesas_usbhs/rcar3.c
+++ b/drivers/usb/renesas_usbhs/rcar3.c
@@ -16,24 +16,39 @@
#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_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 int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
void __iomem *base, int enable)
{
@@ -53,6 +68,34 @@ static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
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;
+
+ if (enable) {
+ usbhs_write32(priv, UGCTRL, 0); /* release PLLRESET */
+ usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 |
+ UGCTRL2_USB0SEL_HSUSB);
+
+ 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;
@@ -62,3 +105,8 @@ 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,
+};
diff --git a/drivers/usb/renesas_usbhs/rcar3.h b/drivers/usb/renesas_usbhs/rcar3.h
index 5f850b23ff18..7fe98175f94f 100644
--- a/drivers/usb/renesas_usbhs/rcar3.h
+++ b/drivers/usb/renesas_usbhs/rcar3.h
@@ -1,3 +1,4 @@
#include "common.h"
extern const struct renesas_usbhs_platform_callback usbhs_rcar3_ops;
+extern const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops;
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h
index 88b002252551..67102f3d59d4 100644
--- a/include/linux/usb/renesas_usbhs.h
+++ b/include/linux/usb/renesas_usbhs.h
@@ -184,8 +184,9 @@ struct renesas_usbhs_driver_param {
#define USBHS_USB_DMAC_XFER_SIZE 32 /* hardcode the xfer size */
};
-#define USBHS_TYPE_RCAR_GEN2 1
-#define USBHS_TYPE_RCAR_GEN3 2
+#define USBHS_TYPE_RCAR_GEN2 1
+#define USBHS_TYPE_RCAR_GEN3 2
+#define USBHS_TYPE_RCAR_GEN3_WITH_PLL 3
/*
* option:
--
2.19.0
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