326 lines
8.7 KiB
Diff
326 lines
8.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Patrick Yavitz <pyavitz@armbian.com>
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Date: Fri, 21 Jun 2024 11:54:06 -0400
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Subject: add spacemit patch set
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source: https://gitee.com/bianbu-linux/linux-6.1
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Signed-off-by: Patrick Yavitz <pyavitz@armbian.com>
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---
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drivers/phy/Kconfig | 1 +
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drivers/phy/Makefile | 1 +
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drivers/phy/spacemit/Kconfig | 11 +
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drivers/phy/spacemit/Makefile | 2 +
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drivers/phy/spacemit/phy-spacemit-k1x-combphy.c | 252 ++++++++++
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5 files changed, 267 insertions(+)
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diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
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index 111111111111..222222222222 100644
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--- a/drivers/phy/Kconfig
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+++ b/drivers/phy/Kconfig
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@@ -96,5 +96,6 @@ source "drivers/phy/tegra/Kconfig"
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source "drivers/phy/ti/Kconfig"
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source "drivers/phy/intel/Kconfig"
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source "drivers/phy/xilinx/Kconfig"
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+source "drivers/phy/spacemit/Kconfig"
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endmenu
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diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
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index 111111111111..222222222222 100644
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--- a/drivers/phy/Makefile
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+++ b/drivers/phy/Makefile
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@@ -30,6 +30,7 @@ obj-y += allwinner/ \
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rockchip/ \
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samsung/ \
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socionext/ \
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+ spacemit/ \
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st/ \
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sunplus/ \
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tegra/ \
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diff --git a/drivers/phy/spacemit/Kconfig b/drivers/phy/spacemit/Kconfig
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new file mode 100644
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index 000000000000..111111111111
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--- /dev/null
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+++ b/drivers/phy/spacemit/Kconfig
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@@ -0,0 +1,11 @@
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+# SPDX-License-Identifier: GPL-2.0
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+#
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+# Phy drivers for Spacemit platforms
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+#
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+config PHY_SPACEMIT_K1X_COMBPHY
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+ tristate "Spacemit K1-x USB3&PCIE combo PHY driver"
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+ depends on OF
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+ select GENERIC_PHY
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+ default SOC_SPACEMIT_K1X && USB_DWC3_SPACEMIT
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+ help
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+ USB3 and PCIE Combo PHY Support for Spacemit k1-x Soc
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diff --git a/drivers/phy/spacemit/Makefile b/drivers/phy/spacemit/Makefile
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new file mode 100644
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index 000000000000..111111111111
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--- /dev/null
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+++ b/drivers/phy/spacemit/Makefile
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@@ -0,0 +1,2 @@
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+# SPDX-License-Identifier: GPL-2.0
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+obj-$(CONFIG_PHY_SPACEMIT_K1X_COMBPHY) += phy-spacemit-k1x-combphy.o
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diff --git a/drivers/phy/spacemit/phy-spacemit-k1x-combphy.c b/drivers/phy/spacemit/phy-spacemit-k1x-combphy.c
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new file mode 100644
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index 000000000000..111111111111
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--- /dev/null
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+++ b/drivers/phy/spacemit/phy-spacemit-k1x-combphy.c
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@@ -0,0 +1,252 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * phy-spacemit-k1x-combphy.c - Spacemit k1-x combo PHY for USB3 and PCIE
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+ *
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+ * Copyright (c) 2023 Spacemit Co., Ltd.
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+ *
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+ */
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+
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+#include <dt-bindings/phy/phy.h>
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+#include <linux/phy/phy.h>
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+#include <linux/platform_device.h>
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+#include <linux/of_device.h>
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+#include <linux/clk.h>
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+#include <linux/reset.h>
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+#include <linux/delay.h>
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+
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+#define SPACEMIT_COMBPHY_WAIT_TIMEOUT 1000
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+#define SPACEMIT_COMBPHY_MODE_SEL BIT(3)
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+
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+// Registers for USB3 PHY
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+#define SPACEMIT_COMBPHY_USB_REG1 0x68
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+#define SPACEMIT_COMBPHY_USB_REG1_VAL 0x0
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+#define SPACEMIT_COMBPHY_USB_REG2 (0x12 << 2)
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+#define SPACEMIT_COMBPHY_USB_REG2_VAL 0x603a2276
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+#define SPACEMIT_COMBPHY_USB_REG3 (0x02 << 2)
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+#define SPACEMIT_COMBPHY_USB_REG3_VAL 0x97c
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+#define SPACEMIT_COMBPHY_USB_REG4 (0x06 << 2)
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+#define SPACEMIT_COMBPHY_USB_REG4_VAL 0x0
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+#define SPACEMIT_COMBPHY_USB_PLL_REG 0x8
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+#define SPACEMIT_COMBPHY_USB_PLL_MASK 0x1
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+#define SPACEMIT_COMBPHY_USB_PLL_VAL 0x1
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+
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+struct spacemit_combphy_priv;
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+
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+struct spacemit_combphy_priv {
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+ struct device *dev;
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+ int num_clks;
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+ struct clk_bulk_data *clks;
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+ struct reset_control *phy_rst;
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+ void __iomem *phy_sel;
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+ void __iomem *puphy_base;
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+ struct phy *phy;
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+ u8 type;
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+};
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+
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+static inline void spacemit_reg_updatel(void __iomem *reg, u32 offset, u32 mask,
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+ u32 val)
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+{
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+ u32 tmp;
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+ tmp = readl(reg + offset);
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+ tmp = (tmp & ~(mask)) | val;
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+ writel(tmp, reg + offset);
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+}
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+
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+static int spacemit_combphy_wait_ready(struct spacemit_combphy_priv *priv,
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+ u32 offset, u32 mask, u32 val)
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+{
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+ int timeout = SPACEMIT_COMBPHY_WAIT_TIMEOUT;
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+ while (((readl(priv->puphy_base + offset) & mask) != val) && --timeout)
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+ ;
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+ if (!timeout) {
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+ return -ETIMEDOUT;
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+ }
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+ dev_dbg(priv->dev, "phy init timeout remain: %d", timeout);
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+ return 0;
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+}
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+
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+static int spacemit_combphy_set_mode(struct spacemit_combphy_priv *priv)
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+{
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+ u8 mode = priv->type;
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+ if (mode == PHY_TYPE_USB3) {
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+ spacemit_reg_updatel(priv->phy_sel, 0, 0,
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+ SPACEMIT_COMBPHY_MODE_SEL);
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+ } else {
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+ dev_err(priv->dev, "PHY type %x not supported\n", mode);
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+ return -EINVAL;
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+ }
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+ return 0;
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+}
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+
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+static int spacemit_combphy_init_usb(struct spacemit_combphy_priv *priv)
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+{
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+ int ret;
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+ void __iomem *base = priv->puphy_base;
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+ dev_info(priv->dev, "USB3 PHY init.\n");
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+
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+ writel(SPACEMIT_COMBPHY_USB_REG1_VAL, base + SPACEMIT_COMBPHY_USB_REG1);
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+ writel(SPACEMIT_COMBPHY_USB_REG2_VAL, base + SPACEMIT_COMBPHY_USB_REG2);
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+ writel(SPACEMIT_COMBPHY_USB_REG3_VAL, base + SPACEMIT_COMBPHY_USB_REG3);
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+ writel(SPACEMIT_COMBPHY_USB_REG4_VAL, base + SPACEMIT_COMBPHY_USB_REG4);
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+
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+ ret = spacemit_combphy_wait_ready(priv, SPACEMIT_COMBPHY_USB_PLL_REG,
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+ SPACEMIT_COMBPHY_USB_PLL_MASK,
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+ SPACEMIT_COMBPHY_USB_PLL_VAL);
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+
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+ if (ret)
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+ dev_err(priv->dev, "USB3 PHY init timeout!\n");
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+
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+ return ret;
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+}
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+
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+static int spacemit_combphy_init(struct phy *phy)
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+{
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+ struct spacemit_combphy_priv *priv = phy_get_drvdata(phy);
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+ int ret;
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+
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+ ret = spacemit_combphy_set_mode(priv);
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+
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+ if (ret) {
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+ dev_err(priv->dev, "failed to set mode for PHY type %x\n",
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+ priv->type);
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+ goto out;
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+ }
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+
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+ ret = clk_bulk_prepare_enable(priv->num_clks, priv->clks);
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+ if (ret) {
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+ dev_err(priv->dev, "failed to enable clks\n");
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+ goto out;
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+ }
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+
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+ ret = reset_control_deassert(priv->phy_rst);
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+ if (ret) {
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+ dev_err(priv->dev, "failed to deassert rst\n");
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+ goto err_clk;
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+ }
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+
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+ switch (priv->type) {
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+ case PHY_TYPE_USB3:
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+ ret = spacemit_combphy_init_usb(priv);
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+ break;
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+ default:
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+ dev_err(priv->dev, "PHY type %x not supported\n", priv->type);
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+ ret = -EINVAL;
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+ break;
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+ }
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+
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+ if (ret)
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+ goto err_rst;
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+
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+ return 0;
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+
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+err_rst:
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+ reset_control_assert(priv->phy_rst);
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+err_clk:
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+ clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
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+out:
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+ return ret;
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+}
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+
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+static int spacemit_combphy_exit(struct phy *phy)
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+{
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+ struct spacemit_combphy_priv *priv = phy_get_drvdata(phy);
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+
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+ clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
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+ reset_control_assert(priv->phy_rst);
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+
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+ return 0;
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+}
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+
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+static struct phy *spacemit_combphy_xlate(struct device *dev,
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+ struct of_phandle_args *args)
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+{
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+ struct spacemit_combphy_priv *priv = dev_get_drvdata(dev);
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+
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+ if (args->args_count != 1) {
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+ dev_err(dev, "invalid number of arguments\n");
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+ return ERR_PTR(-EINVAL);
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+ }
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+
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+ if (priv->type != PHY_NONE && priv->type != args->args[0])
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+ dev_warn(dev, "PHY type %d is selected to override %d\n",
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+ args->args[0], priv->type);
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+
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+ priv->type = args->args[0];
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+
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+ if (args->args_count > 1) {
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+ dev_dbg(dev, "combo phy idx: %d selected", args->args[1]);
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+ }
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+
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+ return priv->phy;
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+}
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+
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+static const struct phy_ops spacemit_combphy_ops = {
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+ .init = spacemit_combphy_init,
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+ .exit = spacemit_combphy_exit,
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+ .owner = THIS_MODULE,
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+};
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+
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+static int spacemit_combphy_probe(struct platform_device *pdev)
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+{
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+ struct phy_provider *phy_provider;
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+ struct device *dev = &pdev->dev;
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+ struct spacemit_combphy_priv *priv;
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+ int ret;
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+
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+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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+ if (!priv)
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+ return -ENOMEM;
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+
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+ priv->puphy_base = devm_platform_ioremap_resource_byname(pdev, "puphy");
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+ if (IS_ERR(priv->puphy_base)) {
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+ ret = PTR_ERR(priv->puphy_base);
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+ return ret;
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+ }
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+
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+ priv->phy_sel = devm_platform_ioremap_resource_byname(pdev, "phy_sel");
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+ if (IS_ERR(priv->phy_sel)) {
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+ ret = PTR_ERR(priv->phy_sel);
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+ return ret;
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+ }
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+
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+ priv->dev = dev;
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+ priv->type = PHY_NONE;
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+
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+ priv->num_clks = devm_clk_bulk_get_all(dev, &priv->clks);
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+
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+ priv->phy_rst = devm_reset_control_array_get_shared(dev);
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+ if (IS_ERR(priv->phy_rst))
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+ return dev_err_probe(dev, PTR_ERR(priv->phy_rst),
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+ "failed to get phy reset\n");
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+
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+ priv->phy = devm_phy_create(dev, NULL, &spacemit_combphy_ops);
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+ if (IS_ERR(priv->phy)) {
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+ dev_err(dev, "failed to create combphy\n");
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+ return PTR_ERR(priv->phy);
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+ }
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+
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+ dev_set_drvdata(dev, priv);
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+ phy_set_drvdata(priv->phy, priv);
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+
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+ phy_provider =
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+ devm_of_phy_provider_register(dev, spacemit_combphy_xlate);
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+
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+ return PTR_ERR_OR_ZERO(phy_provider);
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+}
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+
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+static const struct of_device_id spacemit_combphy_of_match[] = {
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+ {
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+ .compatible = "spacemit,k1x-combphy",
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+ },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, spacemit_combphy_of_match);
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+
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+static struct platform_driver spacemit_combphy_driver = {
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+ .probe = spacemit_combphy_probe,
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+ .driver = {
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+ .name = "spacemit-k1x-combphy",
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+ .of_match_table = spacemit_combphy_of_match,
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+ },
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+};
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+module_platform_driver(spacemit_combphy_driver);
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--
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Armbian
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