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Message-ID: <20250611081804.1196397-3-inochiama@gmail.com>
Date: Wed, 11 Jun 2025 16:18:03 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Chen Wang <unicorn_wang@...look.com>,
Inochi Amaoto <inochiama@...il.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Alexandre Ghiti <alex@...ti.fr>
Cc: linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org,
sophgo@...ts.linux.dev,
linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org,
Yixun Lan <dlan@...too.org>,
Longbin Li <looong.bin@...il.com>
Subject: [PATCH v4 2/2] phy: sophgo: Add USB 2.0 PHY driver for Sophgo CV18XX/SG200X
Add USB 2.0 PHY driver for Sophgo CV18XX/SG200X. Currently
this driver does not support OTG mode as lack of document.
Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/sophgo/Kconfig | 19 +++
drivers/phy/sophgo/Makefile | 2 +
drivers/phy/sophgo/phy-cv1800-usb2.c | 222 +++++++++++++++++++++++++++
5 files changed, 245 insertions(+)
create mode 100644 drivers/phy/sophgo/Kconfig
create mode 100644 drivers/phy/sophgo/Makefile
create mode 100644 drivers/phy/sophgo/phy-cv1800-usb2.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 58c911e1b2d2..678dd0452f0a 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -122,6 +122,7 @@ source "drivers/phy/renesas/Kconfig"
source "drivers/phy/rockchip/Kconfig"
source "drivers/phy/samsung/Kconfig"
source "drivers/phy/socionext/Kconfig"
+source "drivers/phy/sophgo/Kconfig"
source "drivers/phy/st/Kconfig"
source "drivers/phy/starfive/Kconfig"
source "drivers/phy/sunplus/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index c670a8dac468..bfb27fb5a494 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -35,6 +35,7 @@ obj-y += allwinner/ \
rockchip/ \
samsung/ \
socionext/ \
+ sophgo/ \
st/ \
starfive/ \
sunplus/ \
diff --git a/drivers/phy/sophgo/Kconfig b/drivers/phy/sophgo/Kconfig
new file mode 100644
index 000000000000..2c943bbe1f81
--- /dev/null
+++ b/drivers/phy/sophgo/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Phy drivers for Sophgo platforms
+#
+
+if ARCH_SOPHGO || COMPILE_TEST
+
+config PHY_SOPHGO_CV1800_USB2
+ tristate "Sophgo CV18XX/SG200X USB 2.0 PHY support"
+ depends on MFD_SYSCON
+ depends on USB_SUPPORT
+ select GENERIC_PHY
+ help
+ Enable this to support the USB 2.0 PHY used with
+ the DWC2 USB controller in Sophgo CV18XX/SG200X
+ series SoC.
+ If unsure, say N.
+
+endif # ARCH_SOPHGO || COMPILE_TEST
diff --git a/drivers/phy/sophgo/Makefile b/drivers/phy/sophgo/Makefile
new file mode 100644
index 000000000000..318060661759
--- /dev/null
+++ b/drivers/phy/sophgo/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_SOPHGO_CV1800_USB2) += phy-cv1800-usb2.o
diff --git a/drivers/phy/sophgo/phy-cv1800-usb2.c b/drivers/phy/sophgo/phy-cv1800-usb2.c
new file mode 100644
index 000000000000..1d21db7f875b
--- /dev/null
+++ b/drivers/phy/sophgo/phy-cv1800-usb2.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Inochi Amaoto <inochiama@...look.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/bitfield.h>
+#include <linux/debugfs.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+
+#define REG_USB_PHY_CTRL 0x048
+
+#define PHY_ID_OVERWRITE_EN BIT(6)
+#define PHY_ID_OVERWRITE_MODE BIT(7)
+#define PHY_ID_OVERWRITE_MODE_HOST FIELD_PREP(BIT(7), 0)
+#define PHY_ID_OVERWRITE_MODE_DEVICE FIELD_PREP(BIT(7), 1)
+
+#define PHY_APP_CLK_RATE 125000000
+#define PHY_LPM_CLK_RATE 12000000
+#define PHY_STB_CLK_RATE 333334
+
+struct cv1800_usb_phy {
+ struct phy *phy;
+ struct regmap *syscon;
+ spinlock_t lock;
+ struct clk *usb_app_clk;
+ struct clk *usb_lpm_clk;
+ struct clk *usb_stb_clk;
+ bool support_otg;
+};
+
+static int cv1800_usb_phy_set_mode(struct phy *_phy,
+ enum phy_mode mode, int submode)
+{
+ struct cv1800_usb_phy *phy = phy_get_drvdata(_phy);
+ unsigned int regval = 0;
+ int ret;
+
+ switch (mode) {
+ case PHY_MODE_USB_DEVICE:
+ regval = PHY_ID_OVERWRITE_EN | PHY_ID_OVERWRITE_MODE_DEVICE;
+ break;
+ case PHY_MODE_USB_HOST:
+ regval = PHY_ID_OVERWRITE_EN | PHY_ID_OVERWRITE_MODE_HOST;
+ break;
+ case PHY_MODE_USB_OTG:
+ if (!phy->support_otg)
+ return 0;
+
+ ret = regmap_read(phy->syscon, REG_USB_PHY_CTRL, ®val);
+ if (ret)
+ return ret;
+
+ regval = FIELD_GET(PHY_ID_OVERWRITE_MODE, regval);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(phy->syscon, REG_USB_PHY_CTRL,
+ PHY_ID_OVERWRITE_EN | PHY_ID_OVERWRITE_MODE,
+ regval);
+}
+
+static ssize_t dr_mode_write(struct file *file, const char __user *_buf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *seq = file->private_data;
+ struct cv1800_usb_phy *phy = seq->private;
+ enum phy_mode mode;
+ char buf[16];
+
+ if (copy_from_user(&buf, _buf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (sysfs_streq(buf, "host"))
+ mode = PHY_MODE_USB_DEVICE;
+ else if (sysfs_streq(buf, "peripheral"))
+ mode = PHY_MODE_USB_DEVICE;
+ else if (sysfs_streq(buf, "otg"))
+ mode = PHY_MODE_USB_OTG;
+ else
+ return -EINVAL;
+
+ return cv1800_usb_phy_set_mode(phy->phy, mode, 0);
+}
+
+static int dr_mode_show(struct seq_file *seq, void *v)
+{
+ struct cv1800_usb_phy *phy = seq->private;
+ unsigned long flags;
+ unsigned int regval;
+ bool is_host = true;
+ int ret;
+
+ spin_lock_irqsave(&phy->lock, flags);
+ ret = regmap_read(phy->syscon, REG_USB_PHY_CTRL, ®val);
+ spin_unlock_irqrestore(&phy->lock, flags);
+
+ if (ret)
+ return ret;
+
+ if (regval & PHY_ID_OVERWRITE_MODE)
+ is_host = false;
+
+ if (!(regval & PHY_ID_OVERWRITE_EN))
+ seq_puts(seq, "otg: ");
+
+ seq_puts(seq, is_host ? "host\n" : "peripheral\n");
+
+ return 0;
+}
+
+DEFINE_SHOW_STORE_ATTRIBUTE(dr_mode);
+
+static int cv1800_usb_phy_set_clock(struct cv1800_usb_phy *phy)
+{
+ int ret;
+
+ ret = clk_set_rate(phy->usb_app_clk, PHY_APP_CLK_RATE);
+ if (ret)
+ return ret;
+
+ ret = clk_set_rate(phy->usb_lpm_clk, PHY_LPM_CLK_RATE);
+ if (ret)
+ return ret;
+
+ ret = clk_set_rate(phy->usb_stb_clk, PHY_STB_CLK_RATE);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct phy_ops cv1800_usb_phy_ops = {
+ .set_mode = cv1800_usb_phy_set_mode,
+ .owner = THIS_MODULE,
+};
+
+static int cv1800_usb_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device *parent = dev->parent;
+ struct cv1800_usb_phy *phy;
+ struct phy_provider *phy_provider;
+ int ret;
+
+ if (!parent)
+ return -ENODEV;
+
+ phy = devm_kmalloc(dev, sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ phy->syscon = syscon_node_to_regmap(parent->of_node);
+ if (IS_ERR_OR_NULL(phy->syscon))
+ return -ENODEV;
+
+ phy->support_otg = false;
+
+ spin_lock_init(&phy->lock);
+
+ phy->usb_app_clk = devm_clk_get_enabled(dev, "app");
+ if (IS_ERR(phy->usb_app_clk))
+ return dev_err_probe(dev, PTR_ERR(phy->usb_app_clk),
+ "Failed to get app clock\n");
+
+ phy->usb_lpm_clk = devm_clk_get_enabled(dev, "lpm");
+ if (IS_ERR(phy->usb_lpm_clk))
+ return dev_err_probe(dev, PTR_ERR(phy->usb_lpm_clk),
+ "Failed to get lpm clock\n");
+
+ phy->usb_stb_clk = devm_clk_get_enabled(dev, "stb");
+ if (IS_ERR(phy->usb_stb_clk))
+ return dev_err_probe(dev, PTR_ERR(phy->usb_stb_clk),
+ "Failed to get stb clock\n");
+
+ phy->phy = devm_phy_create(dev, NULL, &cv1800_usb_phy_ops);
+ if (IS_ERR(phy->phy))
+ return dev_err_probe(dev, PTR_ERR(phy->phy),
+ "Failed to create phy\n");
+
+ ret = cv1800_usb_phy_set_clock(phy);
+ if (ret)
+ return ret;
+
+ debugfs_create_file("dr_mode", 0644, phy->phy->debugfs,
+ phy, &dr_mode_fops);
+
+ phy_set_drvdata(phy->phy, phy);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id cv1800_usb_phy_ids[] = {
+ { .compatible = "sophgo,cv1800b-usb2-phy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, cv1800_usb_phy_ids);
+
+static struct platform_driver cv1800_usb_phy_driver = {
+ .probe = cv1800_usb_phy_probe,
+ .driver = {
+ .name = "cv1800-usb2-phy",
+ .of_match_table = cv1800_usb_phy_ids,
+ },
+};
+module_platform_driver(cv1800_usb_phy_driver);
+
+MODULE_AUTHOR("Inochi Amaoto <inochiama@...look.com>");
+MODULE_DESCRIPTION("CV1800/SG2000 SoC USB 2.0 PHY driver");
+MODULE_LICENSE("GPL");
--
2.49.0
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