17733f6c3SPawel Laszczak // SPDX-License-Identifier: GPL-2.0
27733f6c3SPawel Laszczak /*
30b490046SPawel Laszczak * Cadence USBSS and USBSSP DRD Driver - host side
47733f6c3SPawel Laszczak *
57733f6c3SPawel Laszczak * Copyright (C) 2018-2019 Cadence Design Systems.
67733f6c3SPawel Laszczak * Copyright (C) 2017-2018 NXP
77733f6c3SPawel Laszczak *
87733f6c3SPawel Laszczak * Authors: Peter Chen <peter.chen@nxp.com>
97733f6c3SPawel Laszczak * Pawel Laszczak <pawell@cadence.com>
107733f6c3SPawel Laszczak */
117733f6c3SPawel Laszczak
127733f6c3SPawel Laszczak #include <linux/platform_device.h>
138581fd40SJakub Kicinski #include <linux/slab.h>
147733f6c3SPawel Laszczak #include "core.h"
157733f6c3SPawel Laszczak #include "drd.h"
165053691aSBen Dooks (Codethink) #include "host-export.h"
17b1234e3bSPeter Chen #include <linux/usb/hcd.h>
18ed227648SPeter Chen #include "../host/xhci.h"
19ed227648SPeter Chen #include "../host/xhci-plat.h"
20ed227648SPeter Chen
21*a92de026SPawel Laszczak /*
22*a92de026SPawel Laszczak * The XECP_PORT_CAP_REG and XECP_AUX_CTRL_REG1 exist only
23*a92de026SPawel Laszczak * in Cadence USB3 dual-role controller, so it can't be used
24*a92de026SPawel Laszczak * with Cadence CDNSP dual-role controller.
25*a92de026SPawel Laszczak */
26ed227648SPeter Chen #define XECP_PORT_CAP_REG 0x8000
27ed227648SPeter Chen #define XECP_AUX_CTRL_REG1 0x8120
28ed227648SPeter Chen
29ed227648SPeter Chen #define CFG_RXDET_P3_EN BIT(15)
30ed227648SPeter Chen #define LPM_2_STB_SWITCH_EN BIT(25)
31ed227648SPeter Chen
xhci_cdns3_plat_start(struct usb_hcd * hcd)329d5333c9SLi Jun static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
339d5333c9SLi Jun {
349d5333c9SLi Jun struct xhci_hcd *xhci = hcd_to_xhci(hcd);
359d5333c9SLi Jun u32 value;
369d5333c9SLi Jun
379d5333c9SLi Jun /* set usbcmd.EU3S */
389d5333c9SLi Jun value = readl(&xhci->op_regs->command);
399d5333c9SLi Jun value |= CMD_PM_INDEX;
409d5333c9SLi Jun writel(value, &xhci->op_regs->command);
419d5333c9SLi Jun
429d5333c9SLi Jun if (hcd->regs) {
439d5333c9SLi Jun value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
449d5333c9SLi Jun value |= CFG_RXDET_P3_EN;
459d5333c9SLi Jun writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
469d5333c9SLi Jun
479d5333c9SLi Jun value = readl(hcd->regs + XECP_PORT_CAP_REG);
489d5333c9SLi Jun value |= LPM_2_STB_SWITCH_EN;
499d5333c9SLi Jun writel(value, hcd->regs + XECP_PORT_CAP_REG);
509d5333c9SLi Jun }
519d5333c9SLi Jun }
529d5333c9SLi Jun
xhci_cdns3_resume_quirk(struct usb_hcd * hcd)539d5333c9SLi Jun static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
549d5333c9SLi Jun {
559d5333c9SLi Jun xhci_cdns3_plat_start(hcd);
569d5333c9SLi Jun return 0;
579d5333c9SLi Jun }
5888171f67SPawel Laszczak
59ed227648SPeter Chen static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
601cc6edd8SPeter Chen .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
619d5333c9SLi Jun .plat_start = xhci_cdns3_plat_start,
629d5333c9SLi Jun .resume_quirk = xhci_cdns3_resume_quirk,
63ed227648SPeter Chen };
647733f6c3SPawel Laszczak
65*a92de026SPawel Laszczak static const struct xhci_plat_priv xhci_plat_cdnsp_xhci;
66*a92de026SPawel Laszczak
__cdns_host_init(struct cdns * cdns)670b490046SPawel Laszczak static int __cdns_host_init(struct cdns *cdns)
687733f6c3SPawel Laszczak {
697733f6c3SPawel Laszczak struct platform_device *xhci;
707733f6c3SPawel Laszczak int ret;
71b1234e3bSPeter Chen struct usb_hcd *hcd;
727733f6c3SPawel Laszczak
730b490046SPawel Laszczak cdns_drd_host_on(cdns);
747733f6c3SPawel Laszczak
757733f6c3SPawel Laszczak xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
767733f6c3SPawel Laszczak if (!xhci) {
777733f6c3SPawel Laszczak dev_err(cdns->dev, "couldn't allocate xHCI device\n");
787733f6c3SPawel Laszczak return -ENOMEM;
797733f6c3SPawel Laszczak }
807733f6c3SPawel Laszczak
817733f6c3SPawel Laszczak xhci->dev.parent = cdns->dev;
827733f6c3SPawel Laszczak cdns->host_dev = xhci;
837733f6c3SPawel Laszczak
847733f6c3SPawel Laszczak ret = platform_device_add_resources(xhci, cdns->xhci_res,
850b490046SPawel Laszczak CDNS_XHCI_RESOURCES_NUM);
867733f6c3SPawel Laszczak if (ret) {
877733f6c3SPawel Laszczak dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
887733f6c3SPawel Laszczak goto err1;
897733f6c3SPawel Laszczak }
907733f6c3SPawel Laszczak
91*a92de026SPawel Laszczak if (cdns->version < CDNSP_CONTROLLER_V2)
927cea9657SPeter Chen cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
937cea9657SPeter Chen sizeof(struct xhci_plat_priv), GFP_KERNEL);
94*a92de026SPawel Laszczak else
95*a92de026SPawel Laszczak cdns->xhci_plat_data = kmemdup(&xhci_plat_cdnsp_xhci,
96*a92de026SPawel Laszczak sizeof(struct xhci_plat_priv), GFP_KERNEL);
97*a92de026SPawel Laszczak
987cea9657SPeter Chen if (!cdns->xhci_plat_data) {
997cea9657SPeter Chen ret = -ENOMEM;
1007cea9657SPeter Chen goto err1;
1017cea9657SPeter Chen }
1027cea9657SPeter Chen
103448373d9SRoger Quadros if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
1047cea9657SPeter Chen cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
1057cea9657SPeter Chen
1067cea9657SPeter Chen ret = platform_device_add_data(xhci, cdns->xhci_plat_data,
107ed227648SPeter Chen sizeof(struct xhci_plat_priv));
108ed227648SPeter Chen if (ret)
1097cea9657SPeter Chen goto free_memory;
110ed227648SPeter Chen
1117733f6c3SPawel Laszczak ret = platform_device_add(xhci);
1127733f6c3SPawel Laszczak if (ret) {
1137733f6c3SPawel Laszczak dev_err(cdns->dev, "failed to register xHCI device\n");
1147cea9657SPeter Chen goto free_memory;
1157733f6c3SPawel Laszczak }
1167733f6c3SPawel Laszczak
117b1234e3bSPeter Chen /* Glue needs to access xHCI region register for Power management */
118b1234e3bSPeter Chen hcd = platform_get_drvdata(xhci);
119b1234e3bSPeter Chen if (hcd)
120b1234e3bSPeter Chen cdns->xhci_regs = hcd->regs;
121b1234e3bSPeter Chen
1227733f6c3SPawel Laszczak return 0;
1237cea9657SPeter Chen
1247cea9657SPeter Chen free_memory:
1257cea9657SPeter Chen kfree(cdns->xhci_plat_data);
1267733f6c3SPawel Laszczak err1:
1277733f6c3SPawel Laszczak platform_device_put(xhci);
1287733f6c3SPawel Laszczak return ret;
1297733f6c3SPawel Laszczak }
1307733f6c3SPawel Laszczak
cdns_host_exit(struct cdns * cdns)1310b490046SPawel Laszczak static void cdns_host_exit(struct cdns *cdns)
1327733f6c3SPawel Laszczak {
1337cea9657SPeter Chen kfree(cdns->xhci_plat_data);
1347733f6c3SPawel Laszczak platform_device_unregister(cdns->host_dev);
1357733f6c3SPawel Laszczak cdns->host_dev = NULL;
1360b490046SPawel Laszczak cdns_drd_host_off(cdns);
1377733f6c3SPawel Laszczak }
1387733f6c3SPawel Laszczak
cdns_host_init(struct cdns * cdns)1390b490046SPawel Laszczak int cdns_host_init(struct cdns *cdns)
1407733f6c3SPawel Laszczak {
1410b490046SPawel Laszczak struct cdns_role_driver *rdrv;
1427733f6c3SPawel Laszczak
1437733f6c3SPawel Laszczak rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
1447733f6c3SPawel Laszczak if (!rdrv)
1457733f6c3SPawel Laszczak return -ENOMEM;
1467733f6c3SPawel Laszczak
1470b490046SPawel Laszczak rdrv->start = __cdns_host_init;
1480b490046SPawel Laszczak rdrv->stop = cdns_host_exit;
1490b490046SPawel Laszczak rdrv->state = CDNS_ROLE_STATE_INACTIVE;
1507733f6c3SPawel Laszczak rdrv->name = "host";
1517733f6c3SPawel Laszczak
1527733f6c3SPawel Laszczak cdns->roles[USB_ROLE_HOST] = rdrv;
1537733f6c3SPawel Laszczak
1547733f6c3SPawel Laszczak return 0;
1557733f6c3SPawel Laszczak }
156