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-rw-r--r--drivers/usb/cdns3/host.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
new file mode 100644
index 000000000..6164fc4c9
--- /dev/null
+++ b/drivers/usb/cdns3/host.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence USBSS and USBSSP DRD Driver - host side
+ *
+ * Copyright (C) 2018-2019 Cadence Design Systems.
+ * Copyright (C) 2017-2018 NXP
+ *
+ * Authors: Peter Chen <peter.chen@nxp.com>
+ * Pawel Laszczak <pawell@cadence.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include "core.h"
+#include "drd.h"
+#include "host-export.h"
+#include <linux/usb/hcd.h>
+#include "../host/xhci.h"
+#include "../host/xhci-plat.h"
+
+#define XECP_PORT_CAP_REG 0x8000
+#define XECP_AUX_CTRL_REG1 0x8120
+
+#define CFG_RXDET_P3_EN BIT(15)
+#define LPM_2_STB_SWITCH_EN BIT(25)
+
+static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ u32 value;
+
+ /* set usbcmd.EU3S */
+ value = readl(&xhci->op_regs->command);
+ value |= CMD_PM_INDEX;
+ writel(value, &xhci->op_regs->command);
+
+ if (hcd->regs) {
+ value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
+ value |= CFG_RXDET_P3_EN;
+ writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
+
+ value = readl(hcd->regs + XECP_PORT_CAP_REG);
+ value |= LPM_2_STB_SWITCH_EN;
+ writel(value, hcd->regs + XECP_PORT_CAP_REG);
+ }
+}
+
+static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
+{
+ xhci_cdns3_plat_start(hcd);
+ return 0;
+}
+
+static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
+ .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
+ .plat_start = xhci_cdns3_plat_start,
+ .resume_quirk = xhci_cdns3_resume_quirk,
+};
+
+static int __cdns_host_init(struct cdns *cdns)
+{
+ struct platform_device *xhci;
+ int ret;
+ struct usb_hcd *hcd;
+
+ cdns_drd_host_on(cdns);
+
+ xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+ if (!xhci) {
+ dev_err(cdns->dev, "couldn't allocate xHCI device\n");
+ return -ENOMEM;
+ }
+
+ xhci->dev.parent = cdns->dev;
+ cdns->host_dev = xhci;
+
+ ret = platform_device_add_resources(xhci, cdns->xhci_res,
+ CDNS_XHCI_RESOURCES_NUM);
+ if (ret) {
+ dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
+ goto err1;
+ }
+
+ cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
+ sizeof(struct xhci_plat_priv), GFP_KERNEL);
+ if (!cdns->xhci_plat_data) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
+ cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
+
+ ret = platform_device_add_data(xhci, cdns->xhci_plat_data,
+ sizeof(struct xhci_plat_priv));
+ if (ret)
+ goto free_memory;
+
+ ret = platform_device_add(xhci);
+ if (ret) {
+ dev_err(cdns->dev, "failed to register xHCI device\n");
+ goto free_memory;
+ }
+
+ /* Glue needs to access xHCI region register for Power management */
+ hcd = platform_get_drvdata(xhci);
+ if (hcd)
+ cdns->xhci_regs = hcd->regs;
+
+ return 0;
+
+free_memory:
+ kfree(cdns->xhci_plat_data);
+err1:
+ platform_device_put(xhci);
+ return ret;
+}
+
+static void cdns_host_exit(struct cdns *cdns)
+{
+ kfree(cdns->xhci_plat_data);
+ platform_device_unregister(cdns->host_dev);
+ cdns->host_dev = NULL;
+ cdns_drd_host_off(cdns);
+}
+
+int cdns_host_init(struct cdns *cdns)
+{
+ struct cdns_role_driver *rdrv;
+
+ rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
+ if (!rdrv)
+ return -ENOMEM;
+
+ rdrv->start = __cdns_host_init;
+ rdrv->stop = cdns_host_exit;
+ rdrv->state = CDNS_ROLE_STATE_INACTIVE;
+ rdrv->name = "host";
+
+ cdns->roles[USB_ROLE_HOST] = rdrv;
+
+ return 0;
+}