Hi Jianguo,
On Fri, 2018-05-04 at 17:20 +0800, [email protected] wrote:
From: Jianguo Sun <[email protected]>
This commit adds support for HiSilicon STB xHCI host controller.
Signed-off-by: Jianguo Sun <[email protected]>
---
drivers/usb/host/Kconfig | 7 +
drivers/usb/host/Makefile | 1 +
drivers/usb/host/xhci-histb.c | 409 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 417 insertions(+)
create mode 100644 drivers/usb/host/xhci-histb.c
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 5d958da..c813fc4 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -52,6 +52,13 @@ config USB_XHCI_PLATFORM
If unsure, say N.
+config USB_XHCI_HISTB
+ tristate "xHCI support for HiSilicon STB SoCs"
+ depends on USB_XHCI_PLATFORM && (ARCH_HISI || COMPILE_TEST)
+ help
+ Say 'Y' to enable the support for the xHCI host controller
+ found in HiSilicon STB SoCs.
+
config USB_XHCI_MTK
tristate "xHCI support for MediaTek SoCs"
select MFD_SYSCON
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 8a8cffe..9b669c9 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -74,6 +74,7 @@ obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
+obj-$(CONFIG_USB_XHCI_HISTB) += xhci-histb.o
obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o
obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c
new file mode 100644
index 0000000..5ec549f
--- /dev/null
+++ b/drivers/usb/host/xhci-histb.c
@@ -0,0 +1,409 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xHCI host controller driver for HiSilicon STB SoCs
+ *
+ * Copyright (C) 2017-2018 HiSilicon Co., Ltd. http://www.hisilicon.com
+ *
+ * Authors: Jianguo Sun <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
No need anymore if SPDX-License-Identifier is provided
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
Not used
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
ditto
+#include <linux/reset.h>
+
+#include "xhci.h"
+
+#define GTXTHRCFG 0xc108
+#define GRXTHRCFG 0xc10c
+#define REG_GUSB2PHYCFG0 0xc200
+#define BIT_UTMI_8_16 BIT(3)
+#define BIT_UTMI_ULPI BIT(4)
+#define BIT_FREECLK_EXIST BIT(30)
+
+#define REG_GUSB3PIPECTL0 0xc2c0
+#define USB3_DEEMPHASIS_MASK GENMASK(2, 1)
+#define USB3_DEEMPHASIS0 BIT(1)
+#define USB3_TX_MARGIN1 BIT(4)
+
+struct xhci_hcd_histb {
+ struct device *dev;
+ struct usb_hcd *hcd;
+ void __iomem *ctrl;
+ struct clk *bus_clk;
+ struct clk *utmi_clk;
+ struct clk *pipe_clk;
+ struct clk *suspend_clk;
+ struct reset_control *soft_reset;
+};
+
+static inline struct xhci_hcd_histb *hcd_to_histb(struct usb_hcd *hcd)
+{
+ return dev_get_drvdata(hcd->self.controller);
+}
+
+static int xhci_histb_config(struct xhci_hcd_histb *histb)
+{
+ struct device_node *np = histb->dev->of_node;
+ u32 regval;
+
+ if (of_property_match_string(np, "phys-names", "inno") >= 0) {
+ /* USB2 PHY chose ulpi 8bit interface */
+ regval = readl(histb->ctrl + REG_GUSB2PHYCFG0);
+ regval &= ~BIT_UTMI_ULPI;
+ regval &= ~(BIT_UTMI_8_16);
+ regval &= ~BIT_FREECLK_EXIST;
+ writel(regval, histb->ctrl + REG_GUSB2PHYCFG0);
+ }
+
+ if (of_property_match_string(np, "phys-names", "combo") >= 0) {
+ /*
+ * write 0x010c0012 to GUSB3PIPECTL0
+ * GUSB3PIPECTL0[5:3] = 010 : Tx Margin = 900mV ,
+ * decrease TX voltage
+ * GUSB3PIPECTL0[2:1] = 01 : Tx Deemphasis = -3.5dB,
+ * refer to xHCI spec
+ */
+ regval = readl(histb->ctrl + REG_GUSB3PIPECTL0);
+ regval &= ~USB3_DEEMPHASIS_MASK;
+ regval |= USB3_DEEMPHASIS0;
+ regval |= USB3_TX_MARGIN1;
+ writel(regval, histb->ctrl + REG_GUSB3PIPECTL0);
+ }
+
+ writel(0x23100000, histb->ctrl + GTXTHRCFG);
+ writel(0x23100000, histb->ctrl + GRXTHRCFG);
+
+ return 0;
+}
+
+static int xhci_histb_clks_get(struct xhci_hcd_histb *histb)
+{
+ struct device *dev = histb->dev;
+
+ histb->bus_clk = devm_clk_get(dev, "bus");
+ if (IS_ERR(histb->bus_clk)) {
+ dev_err(dev, "fail to get bus clk\n");
+ return PTR_ERR(histb->bus_clk);
+ }
+
+ histb->utmi_clk = devm_clk_get(dev, "utmi");
+ if (IS_ERR(histb->utmi_clk)) {
+ dev_err(dev, "fail to get utmi clk\n");
+ return PTR_ERR(histb->utmi_clk);
+ }
+
+ histb->pipe_clk = devm_clk_get(dev, "pipe");
+ if (IS_ERR(histb->pipe_clk)) {
+ dev_err(dev, "fail to get pipe clk\n");
+ return PTR_ERR(histb->pipe_clk);
+ }
+
+ histb->suspend_clk = devm_clk_get(dev, "suspend");
+ if (IS_ERR(histb->suspend_clk)) {
+ dev_err(dev, "fail to get suspend clk\n");
+ return PTR_ERR(histb->suspend_clk);
+ }
+
+ return 0;
+}
+
+static int xhci_histb_host_enable(struct xhci_hcd_histb *histb)
+{
+ int ret;
+
+ ret = clk_prepare_enable(histb->bus_clk);
+ if (ret) {
+ dev_err(histb->dev, "failed to enable bus clk\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(histb->utmi_clk);
+ if (ret) {
+ dev_err(histb->dev, "failed to enable utmi clk\n");
+ goto err_utmi_clk;
+ }
+
+ ret = clk_prepare_enable(histb->pipe_clk);
+ if (ret) {
+ dev_err(histb->dev, "failed to enable pipe clk\n");
+ goto err_pipe_clk;
+ }
+
+ ret = clk_prepare_enable(histb->suspend_clk);
+ if (ret) {
+ dev_err(histb->dev, "failed to enable suspend clk\n");
+ goto err_suspend_clk;
+ }
+
+ reset_control_deassert(histb->soft_reset);
+
+ return 0;
+
+err_suspend_clk:
+ clk_disable_unprepare(histb->pipe_clk);
+err_pipe_clk:
+ clk_disable_unprepare(histb->utmi_clk);
+err_utmi_clk:
+ clk_disable_unprepare(histb->bus_clk);
+
+ return ret;
+}
+
+static void xhci_histb_host_disable(struct xhci_hcd_histb *histb)
+{
+ reset_control_assert(histb->soft_reset);
+
+ clk_disable_unprepare(histb->suspend_clk);
+ clk_disable_unprepare(histb->pipe_clk);
+ clk_disable_unprepare(histb->utmi_clk);
+ clk_disable_unprepare(histb->bus_clk);
+}
+
+static void xhci_histb_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+ /*
+ * As of now platform drivers don't provide MSI support so we ensure
+ * here that the generic code does not try to make a pci_dev from our
+ * dev struct in order to setup MSI
+ */
+ xhci->quirks |= XHCI_PLAT;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_histb_setup(struct usb_hcd *hcd)
+{
+ struct xhci_hcd_histb *histb = hcd_to_histb(hcd);
+ int ret;
+
+ if (usb_hcd_is_primary_hcd(hcd)) {
+ ret = xhci_histb_config(histb);
+ if (ret)
+ return ret;
+ }
+
+ ret = xhci_gen_setup(hcd, xhci_histb_quirks);
+ if (ret)
+ return ret;
no need test @ret here
+
+ return ret;
+}
+
+static const struct xhci_driver_overrides xhci_histb_overrides __initconst = {
+ .reset = xhci_histb_setup,
+};
+
+static struct hc_driver __read_mostly xhci_histb_hc_driver;
+static int xhci_histb_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct xhci_hcd_histb *histb;
+ const struct hc_driver *driver;
+ struct usb_hcd *hcd;
+ struct xhci_hcd *xhci;
+ struct resource *res;
+ int irq;
+ int ret = -ENODEV;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ driver = &xhci_histb_hc_driver;
+ histb = devm_kzalloc(dev, sizeof(*histb), GFP_KERNEL);
+ if (!histb)
+ return -ENOMEM;
+
+ histb->dev = dev;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ histb->ctrl = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(histb->ctrl))
+ return PTR_ERR(histb->ctrl);
+
+ ret = xhci_histb_clks_get(histb);
+ if (ret)
+ return ret;
+
+ histb->soft_reset = devm_reset_control_get(dev, "soft");
+ if (IS_ERR(histb->soft_reset)) {
+ dev_err(dev, "failed to get soft reset\n");
+ return PTR_ERR(histb->soft_reset);
+ }
+
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+ device_enable_async_suspend(dev);
+
+ /* Initialize dma_mask and coherent_dma_mask to 32-bits */
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ hcd = usb_create_hcd(driver, dev, dev_name(dev));
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto disable_pm;
+ }
+
+ hcd->regs = histb->ctrl;
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ histb->hcd = hcd;
+ dev_set_drvdata(hcd->self.controller, histb);
+
+ ret = xhci_histb_host_enable(histb);
+ if (ret)
+ goto put_hcd;
+
+ xhci = hcd_to_xhci(hcd);
+
+ device_wakeup_enable(hcd->self.controller);
+
+ xhci->main_hcd = hcd;
+ xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev),
+ hcd);
+ if (!xhci->shared_hcd) {
+ ret = -ENOMEM;
+ goto disable_host;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto put_usb3_hcd;
+
+ if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+ xhci->shared_hcd->can_do_streams = 1;
+
+ ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto dealloc_usb2_hcd;
+
+ device_enable_async_suspend(dev);
+ pm_runtime_put_noidle(dev);
+
+ /*
+ * Prevent runtime pm from being on as default, users should enable
+ * runtime pm using power/control in sysfs.
+ */
+ pm_runtime_forbid(dev);
+
Are you sure make use of the default value xhci->imod_interval == 0 ?
+ return 0;
+
+dealloc_usb2_hcd:
+ usb_remove_hcd(hcd);
+put_usb3_hcd:
+ usb_put_hcd(xhci->shared_hcd);
+disable_host:
+ xhci_histb_host_disable(histb);
+put_hcd:
+ usb_put_hcd(hcd);
+disable_pm:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+
+ return ret;
+}
+
+static int xhci_histb_remove(struct platform_device *dev)
+{
+ struct xhci_hcd_histb *histb = platform_get_drvdata(dev);
+ struct usb_hcd *hcd = histb->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ xhci->xhc_state |= XHCI_STATE_REMOVING;
+
+ usb_remove_hcd(xhci->shared_hcd);
+ device_wakeup_disable(&dev->dev);
+
+ usb_remove_hcd(hcd);
+ usb_put_hcd(xhci->shared_hcd);
+
+ xhci_histb_host_disable(histb);
+ usb_put_hcd(hcd);
+ pm_runtime_put_sync(&dev->dev);
+ pm_runtime_disable(&dev->dev);
+
+ return 0;
+}
+
+static int __maybe_unused xhci_histb_suspend(struct device *dev)
+{
+ struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+ struct usb_hcd *hcd = histb->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ int ret;
+
+ ret = xhci_suspend(xhci, device_may_wakeup(dev));
+
+ if (!device_may_wakeup(dev))
+ xhci_histb_host_disable(histb);
+
+ return ret;
+}
+
+static int __maybe_unused xhci_histb_resume(struct device *dev)
+{
+ struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+ struct usb_hcd *hcd = histb->hcd;
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ if (!device_may_wakeup(dev))
+ xhci_histb_host_enable(histb);
+
+ return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_histb_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xhci_histb_suspend, xhci_histb_resume)
+};
+#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_histb_pm_ops : NULL)
+
+#ifdef CONFIG_OF
+static const struct of_device_id histb_xhci_of_match[] = {
+ { .compatible = "hisilicon,hi3798cv200-xhci"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, histb_xhci_of_match);
+#endif
+
+static struct platform_driver histb_xhci_driver = {
+ .probe = xhci_histb_probe,
+ .remove = xhci_histb_remove,
+ .driver = {
+ .name = "xhci-histb",
+ .pm = DEV_PM_OPS,
+ .of_match_table = of_match_ptr(histb_xhci_of_match),
+ },
+};
+MODULE_ALIAS("platform:xhci-histb");
+
+static int __init xhci_histb_init(void)
+{
+ xhci_init_driver(&xhci_histb_hc_driver, &xhci_histb_overrides);
+ return platform_driver_register(&histb_xhci_driver);
+}
+module_init(xhci_histb_init);
+
+static void __exit xhci_histb_exit(void)
+{
+ platform_driver_unregister(&histb_xhci_driver);
+}
+module_exit(xhci_histb_exit);
+
+MODULE_DESCRIPTION("HiSilicon STB xHCI Host Controller Driver");
+MODULE_LICENSE("GPL v2");
