[PATCH v4 6/7] usb: cdns3: add StarFive JH7110 USB driver.
Minda Chen
minda.chen at starfivetech.com
Wed Apr 5 18:52:15 PDT 2023
Adds Specific Glue layer to support USB peripherals on
StarFive JH7110 SoC.
There is a Cadence USB3 core for JH7110 SoCs, the cdns
core is the child of this USB wrapper module device.
Signed-off-by: Minda Chen <minda.chen at starfivetech.com>
---
MAINTAINERS | 7 +
drivers/usb/cdns3/Kconfig | 11 +
drivers/usb/cdns3/Makefile | 1 +
drivers/usb/cdns3/cdns3-starfive.c | 378 +++++++++++++++++++++++++++++
drivers/usb/cdns3/core.h | 3 +
5 files changed, 400 insertions(+)
create mode 100644 drivers/usb/cdns3/cdns3-starfive.c
diff --git a/MAINTAINERS b/MAINTAINERS
index d98b70d62fd4..0610bbf921bb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19977,6 +19977,13 @@ F: Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml
F: drivers/phy/starfive/phy-jh7110-pcie.c
F: drivers/phy/starfive/phy-jh7110-usb.c
+STARFIVE JH71X0 USB DRIVERS
+M: Emil Renner Berthing <kernel at esmil.dk>
+M: Minda Chen <minda.chen at starfivetech.com>
+S: Maintained
+F: Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml
+F: drivers/usb/cdns3/cdns3-starfive.c
+
STATIC BRANCH/CALL
M: Peter Zijlstra <peterz at infradead.org>
M: Josh Poimboeuf <jpoimboe at kernel.org>
diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig
index b98ca0a1352a..0a514b591527 100644
--- a/drivers/usb/cdns3/Kconfig
+++ b/drivers/usb/cdns3/Kconfig
@@ -78,6 +78,17 @@ config USB_CDNS3_IMX
For example, imx8qm and imx8qxp.
+config USB_CDNS3_STARFIVE
+ tristate "Cadence USB3 support on StarFive SoC platforms"
+ depends on ARCH_STARFIVE || COMPILE_TEST
+ help
+ Say 'Y' or 'M' here if you are building for StarFive SoCs
+ platforms that contain Cadence USB3 controller core.
+
+ e.g. JH7110.
+
+ If you choose to build this driver as module it will
+ be dynamically linked and module will be called cdns3-starfive.ko
endif
if USB_CDNS_SUPPORT
diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile
index 61edb2f89276..48dfae75b5aa 100644
--- a/drivers/usb/cdns3/Makefile
+++ b/drivers/usb/cdns3/Makefile
@@ -24,6 +24,7 @@ endif
obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o
obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o
obj-$(CONFIG_USB_CDNS3_IMX) += cdns3-imx.o
+obj-$(CONFIG_USB_CDNS3_STARFIVE) += cdns3-starfive.o
cdnsp-udc-pci-y := cdnsp-pci.o
diff --git a/drivers/usb/cdns3/cdns3-starfive.c b/drivers/usb/cdns3/cdns3-starfive.c
new file mode 100644
index 000000000000..925209a97bf9
--- /dev/null
+++ b/drivers/usb/cdns3/cdns3-starfive.c
@@ -0,0 +1,378 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * cdns3-starfive.c - StarFive specific Glue layer for Cadence USB Controller
+ *
+ * Copyright (C) 2022 Starfive, Inc.
+ * Author: Yanhong Wang <yanhong.wang at starfivetech.com>
+ * Author: Mason Huo <mason.huo at starfivetech.com>
+ * Author: Minda Chen <minda.chen at starfivetech.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/usb/otg.h>
+#include "core.h"
+
+#define USB_STRAP_HOST BIT(17)
+#define USB_STRAP_DEVICE BIT(18)
+#define USB_STRAP_MASK GENMASK(18, 16)
+
+#define USB_SUSPENDM_HOST BIT(19)
+#define USB_SUSPENDM_MASK BIT(19)
+#define CDNS_IRQ_WAKEUP_INDEX 3
+
+struct cdns_starfive {
+ struct device *dev;
+ struct phy *usb2_phy;
+ struct phy *usb3_phy;
+ struct regmap *stg_syscon;
+ struct reset_control *resets;
+ struct clk_bulk_data *clks;
+ int num_clks;
+ enum phy_mode phy_mode;
+ u32 stg_usb_mode;
+};
+
+static int set_phy_power_on(struct cdns_starfive *data)
+{
+ int ret;
+
+ ret = phy_power_on(data->usb2_phy);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(data->usb3_phy);
+ if (ret)
+ phy_power_off(data->usb2_phy);
+
+ return ret;
+}
+
+static void set_phy_power_off(struct cdns_starfive *data)
+{
+ phy_power_off(data->usb3_phy);
+ phy_power_off(data->usb2_phy);
+}
+
+static void cdns_mode_init(struct platform_device *pdev,
+ struct cdns_starfive *data)
+{
+ enum usb_dr_mode mode;
+
+ mode = usb_get_dr_mode(&pdev->dev);
+
+ switch (mode) {
+ case USB_DR_MODE_HOST:
+ regmap_update_bits(data->stg_syscon,
+ data->stg_usb_mode,
+ USB_STRAP_MASK,
+ USB_STRAP_HOST);
+ regmap_update_bits(data->stg_syscon,
+ data->stg_usb_mode,
+ USB_SUSPENDM_MASK,
+ USB_SUSPENDM_HOST);
+ data->phy_mode = PHY_MODE_USB_HOST;
+ break;
+
+ case USB_DR_MODE_PERIPHERAL:
+ regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
+ USB_STRAP_MASK, USB_STRAP_DEVICE);
+ regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
+ USB_SUSPENDM_MASK, 0);
+ data->phy_mode = PHY_MODE_USB_DEVICE;
+ break;
+
+ case USB_DR_MODE_OTG:
+ data->phy_mode = PHY_MODE_USB_OTG;
+ default:
+ break;
+ }
+}
+
+static int cdns_clk_rst_init(struct cdns_starfive *data)
+{
+ int ret;
+
+ data->num_clks = devm_clk_bulk_get_all(data->dev, &data->clks);
+ if (data->num_clks < 0)
+ return dev_err_probe(data->dev, -ENODEV,
+ "Failed to get clocks\n");
+
+ data->resets = devm_reset_control_array_get_exclusive(data->dev);
+ if (IS_ERR(data->resets)) {
+ return dev_err_probe(data->dev, PTR_ERR(data->resets),
+ "Failed to get resets");
+ }
+
+ ret = clk_bulk_prepare_enable(data->num_clks, data->clks);
+ if (ret)
+ return dev_err_probe(data->dev, ret,
+ "failed to enable clocks\n");
+
+ ret = reset_control_deassert(data->resets);
+ if (ret) {
+ ret = dev_err_probe(data->dev, ret,
+ "failed to reset clocks\n");
+ goto err_clk_init;
+ }
+
+ return ret;
+
+err_clk_init:
+ clk_bulk_disable_unprepare(data->num_clks, data->clks);
+ return ret;
+}
+
+static int cdns3_starfive_phy_init(struct device *dev, struct cdns_starfive *data)
+{
+ int ret;
+
+ ret = phy_init(data->usb2_phy);
+ if (ret)
+ return ret;
+
+ ret = phy_init(data->usb3_phy);
+ if (ret)
+ goto err_phy3_init;
+
+ ret = set_phy_power_on(data);
+ if (ret)
+ goto err_phy_power_on;
+
+ phy_set_mode(data->usb2_phy, data->phy_mode);
+ phy_set_mode(data->usb3_phy, data->phy_mode);
+
+ return 0;
+
+err_phy_power_on:
+ phy_exit(data->usb3_phy);
+err_phy3_init:
+ phy_exit(data->usb2_phy);
+ return ret;
+}
+
+static int cdns3_starfive_platform_device_add(struct platform_device *pdev,
+ struct cdns_starfive *data)
+{
+ struct platform_device *cdns3;
+ struct resource cdns_res[CDNS_RESOURCES_NUM], *res;
+ struct device *dev = &pdev->dev;
+ const char *reg_name[CDNS_IOMEM_RESOURCES_NUM] = {"otg", "xhci", "dev"};
+ const char *irq_name[CDNS_IRQ_RESOURCES_NUM] = {"host", "peripheral", "otg", "wakeup"};
+ int i, ret, res_idx = 0;
+
+ cdns3 = platform_device_alloc("cdns-usb3", PLATFORM_DEVID_AUTO);
+ if (!cdns3)
+ return dev_err_probe(dev, -ENOMEM,
+ "couldn't alloc cdns3 usb device\n");
+
+ cdns3->dev.parent = dev;
+ memset(cdns_res, 0, sizeof(cdns_res));
+
+ for (i = 0; i < CDNS_IOMEM_RESOURCES_NUM; i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, reg_name[i]);
+ if (!res) {
+ ret = dev_err_probe(dev,
+ -ENXIO, "couldn't get %s reg resource\n", reg_name[i]);
+ goto free_memory;
+ }
+ cdns_res[res_idx] = *res;
+ res_idx++;
+ }
+
+ for (i = 0; i < CDNS_IRQ_RESOURCES_NUM; i++) {
+ if (i == CDNS_IRQ_WAKEUP_INDEX) {
+ ret = platform_get_irq_byname_optional(pdev, irq_name[i]);
+ if (ret < 0)
+ continue;
+ } else {
+ ret = platform_get_irq_byname(pdev, irq_name[i]);
+ if (ret < 0) {
+ dev_err(dev, "couldn't get %s irq\n", irq_name[i]);
+ goto free_memory;
+ }
+ }
+ cdns_res[res_idx].start = ret;
+ cdns_res[res_idx].end = ret;
+ cdns_res[res_idx].flags = IORESOURCE_IRQ;
+ cdns_res[res_idx].name = irq_name[i];
+ res_idx++;
+ }
+
+ ret = platform_device_add_resources(cdns3, cdns_res, res_idx);
+ if (ret) {
+ dev_err(dev, "couldn't add res to cdns3 device\n");
+ goto free_memory;
+ }
+
+ ret = platform_device_add(cdns3);
+ if (ret) {
+ dev_err(dev, "failed to register cdns3 device\n");
+ goto free_memory;
+ }
+
+ return ret;
+free_memory:
+ platform_device_put(cdns3);
+ return ret;
+}
+
+static int cdns_starfive_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cdns_starfive *data;
+ unsigned int args;
+ int ret;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, data);
+
+ data->dev = dev;
+
+ data->stg_syscon = syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node,
+ "starfive,stg-syscon", 1, &args);
+
+ if (IS_ERR(data->stg_syscon))
+ return dev_err_probe(dev, PTR_ERR(data->stg_syscon),
+ "Failed to parse starfive,stg-syscon\n");
+
+ data->stg_usb_mode = args;
+
+ cdns_mode_init(pdev, data);
+
+ ret = cdns_clk_rst_init(data);
+ if (ret)
+ return ret;
+
+ data->usb2_phy = devm_phy_optional_get(dev, "usb2-phy");
+ if (IS_ERR(data->usb2_phy))
+ return dev_err_probe(dev, PTR_ERR(data->usb2_phy),
+ "Failed to parse usb2 phy\n");
+
+ data->usb3_phy = devm_phy_optional_get(dev, "usb3-phy");
+ if (IS_ERR(data->usb3_phy))
+ return dev_err_probe(dev, PTR_ERR(data->usb3_phy),
+ "Failed to parse usb3 phy\n");
+
+ cdns3_starfive_phy_init(dev, data);
+
+ ret = cdns3_starfive_platform_device_add(pdev, data);
+ if (ret) {
+ set_phy_power_off(data);
+ phy_exit(data->usb3_phy);
+ phy_exit(data->usb2_phy);
+ reset_control_assert(data->resets);
+ clk_bulk_disable_unprepare(data->num_clks, data->clks);
+ return dev_err_probe(dev, ret, "Failed to create children\n");
+ }
+
+ device_set_wakeup_capable(dev, true);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ dev_info(dev, "usb mode %d probe success\n", data->phy_mode);
+
+ return 0;
+}
+
+static int cdns_starfive_remove_core(struct device *dev, void *c)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ platform_device_unregister(pdev);
+
+ return 0;
+}
+
+static int cdns_starfive_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cdns_starfive *data = dev_get_drvdata(dev);
+
+ pm_runtime_get_sync(dev);
+ device_for_each_child(dev, NULL, cdns_starfive_remove_core);
+
+ set_phy_power_off(data);
+ phy_exit(data->usb2_phy);
+ phy_exit(data->usb3_phy);
+
+ reset_control_assert(data->resets);
+ clk_bulk_disable_unprepare(data->num_clks, data->clks);
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int cdns_starfive_resume(struct device *dev)
+{
+ struct cdns_starfive *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_bulk_prepare_enable(data->num_clks, data->clks);
+ if (ret)
+ return ret;
+
+ ret = reset_control_deassert(data->resets);
+ if (ret)
+ return ret;
+
+ ret = cdns3_starfive_phy_init(dev, data);
+
+ return ret;
+}
+
+static int cdns_starfive_suspend(struct device *dev)
+{
+ struct cdns_starfive *data = dev_get_drvdata(dev);
+
+ set_phy_power_off(data);
+ phy_exit(data->usb2_phy);
+ phy_exit(data->usb3_phy);
+ reset_control_assert(data->resets);
+ clk_bulk_disable_unprepare(data->num_clks, data->clks);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops cdns_starfive_pm_ops = {
+ SET_RUNTIME_PM_OPS(cdns_starfive_suspend, cdns_starfive_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(cdns_starfive_suspend, cdns_starfive_resume)
+};
+
+static const struct of_device_id cdns_starfive_of_match[] = {
+ { .compatible = "starfive,jh7110-usb", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, cdns_starfive_of_match);
+
+static struct platform_driver cdns_starfive_driver = {
+ .probe = cdns_starfive_probe,
+ .remove = cdns_starfive_remove,
+ .driver = {
+ .name = "cdns3-starfive",
+ .of_match_table = cdns_starfive_of_match,
+ .pm = &cdns_starfive_pm_ops,
+ },
+};
+module_platform_driver(cdns_starfive_driver);
+
+MODULE_ALIAS("platform:cdns3-starfive");
+MODULE_AUTHOR("YanHong Wang <yanhong.wang at starfivetech.com>");
+MODULE_AUTHOR("Mason Huo <mason.huo at starfivetech.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Cadence USB3 StarFive Glue Layer");
diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
index 2d332a788871..8d44ab504898 100644
--- a/drivers/usb/cdns3/core.h
+++ b/drivers/usb/cdns3/core.h
@@ -38,6 +38,9 @@ struct cdns_role_driver {
};
#define CDNS_XHCI_RESOURCES_NUM 2
+#define CDNS_IOMEM_RESOURCES_NUM 3
+#define CDNS_IRQ_RESOURCES_NUM 4
+#define CDNS_RESOURCES_NUM (CDNS_IOMEM_RESOURCES_NUM + CDNS_IRQ_RESOURCES_NUM)
struct cdns3_platform_data {
int (*platform_suspend)(struct device *dev,
--
2.17.1
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