From: Meng Dongyang <daniel.meng@rock-chips.com>
Date: Fri, 30 Dec 2016 03:45:20 +0000 (+0800)
Subject: phy: rockchip-inno-usb2: add support of u2phy for rk3328
X-Git-Tag: firefly_0821_release~655
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=591482d01ff46fc1d031f104a3a9b22fbbd0d89d;ds=sidebyside

phy: rockchip-inno-usb2: add support of u2phy for rk3328

The u2phy driver of kernel 4.4 need add config and specific tuning
for rk3328. This patch add support of u2phy for rk3328.

Change-Id: Ie1bdfc0fde37d7d0b26d0f3aac136481bd6f4c44
Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
---

diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c
index bc376687fba3..f258c9007084 100644
--- a/drivers/phy/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/phy-rockchip-inno-usb2.c
@@ -1364,6 +1364,26 @@ disable_clks:
 	return ret;
 }
 
+static int rk3328_usb2phy_tuning(struct rockchip_usb2phy *rphy)
+{
+	int ret;
+
+	/* Open debug mode for tuning */
+	ret = regmap_write(rphy->grf, 0x2c, 0xffff0400);
+	if (ret)
+		return ret;
+
+	/*
+	 * Open HS pre-emphasize function to increase
+	 * HS slew rate for host port
+	 */
+	ret = regmap_write(rphy->grf, 0x30, 0xffff851d);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int rk3366_usb2phy_tuning(struct rockchip_usb2phy *rphy)
 {
 	unsigned int open_pre_emphasize = 0xffff851f;
@@ -1475,6 +1495,26 @@ static const struct dev_pm_ops rockchip_usb2phy_dev_pm_ops = {
 #define ROCKCHIP_USB2PHY_DEV_PM	NULL
 #endif /* CONFIG_PM_SLEEP */
 
+static const struct rockchip_usb2phy_cfg rk3328_phy_cfgs[] = {
+	{
+		.reg = 0x100,
+		.num_ports	= 2,
+		.phy_tuning	= rk3328_usb2phy_tuning,
+		.clkout_ctl	= { 0x108, 4, 4, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_HOST] = {
+				.phy_sus	= { 0x104, 15, 0, 0, 0x1d1 },
+				.ls_det_en	= { 0x110, 1, 1, 0, 1 },
+				.ls_det_st	= { 0x114, 1, 1, 0, 1 },
+				.ls_det_clr	= { 0x118, 1, 1, 0, 1 },
+				.utmi_ls	= { 0x120, 17, 16, 0, 1 },
+				.utmi_hstdet	= { 0x120, 19, 19, 0, 1 }
+			}
+		},
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rockchip_usb2phy_cfg rk3366_phy_cfgs[] = {
 	{
 		.reg = 0x700,
@@ -1584,6 +1624,7 @@ static const struct rockchip_usb2phy_cfg rk3399_phy_cfgs[] = {
 };
 
 static const struct of_device_id rockchip_usb2phy_dt_match[] = {
+	{ .compatible = "rockchip,rk3328-usb2phy", .data = &rk3328_phy_cfgs },
 	{ .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
 	{ .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
 	{}