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> 137733f6c3SPawel Laszczak #include "core.h" 147733f6c3SPawel Laszczak #include "drd.h" 155053691aSBen Dooks (Codethink) #include "host-export.h" 16b1234e3bSPeter Chen #include <linux/usb/hcd.h> 17ed227648SPeter Chen #include "../host/xhci.h" 18ed227648SPeter Chen #include "../host/xhci-plat.h" 19ed227648SPeter Chen 20ed227648SPeter Chen #define XECP_PORT_CAP_REG 0x8000 21ed227648SPeter Chen #define XECP_AUX_CTRL_REG1 0x8120 22ed227648SPeter Chen 23ed227648SPeter Chen #define CFG_RXDET_P3_EN BIT(15) 24ed227648SPeter Chen #define LPM_2_STB_SWITCH_EN BIT(25) 25ed227648SPeter Chen 26*88171f67SPawel Laszczak static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd); 27*88171f67SPawel Laszczak 28ed227648SPeter Chen static const struct xhci_plat_priv xhci_plat_cdns3_xhci = { 291cc6edd8SPeter Chen .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI, 30ed227648SPeter Chen .suspend_quirk = xhci_cdns3_suspend_quirk, 31ed227648SPeter Chen }; 327733f6c3SPawel Laszczak 330b490046SPawel Laszczak static int __cdns_host_init(struct cdns *cdns) 347733f6c3SPawel Laszczak { 357733f6c3SPawel Laszczak struct platform_device *xhci; 367733f6c3SPawel Laszczak int ret; 37b1234e3bSPeter Chen struct usb_hcd *hcd; 387733f6c3SPawel Laszczak 390b490046SPawel Laszczak cdns_drd_host_on(cdns); 407733f6c3SPawel Laszczak 417733f6c3SPawel Laszczak xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); 427733f6c3SPawel Laszczak if (!xhci) { 437733f6c3SPawel Laszczak dev_err(cdns->dev, "couldn't allocate xHCI device\n"); 447733f6c3SPawel Laszczak return -ENOMEM; 457733f6c3SPawel Laszczak } 467733f6c3SPawel Laszczak 477733f6c3SPawel Laszczak xhci->dev.parent = cdns->dev; 487733f6c3SPawel Laszczak cdns->host_dev = xhci; 497733f6c3SPawel Laszczak 507733f6c3SPawel Laszczak ret = platform_device_add_resources(xhci, cdns->xhci_res, 510b490046SPawel Laszczak CDNS_XHCI_RESOURCES_NUM); 527733f6c3SPawel Laszczak if (ret) { 537733f6c3SPawel Laszczak dev_err(cdns->dev, "couldn't add resources to xHCI device\n"); 547733f6c3SPawel Laszczak goto err1; 557733f6c3SPawel Laszczak } 567733f6c3SPawel Laszczak 577cea9657SPeter Chen cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci, 587cea9657SPeter Chen sizeof(struct xhci_plat_priv), GFP_KERNEL); 597cea9657SPeter Chen if (!cdns->xhci_plat_data) { 607cea9657SPeter Chen ret = -ENOMEM; 617cea9657SPeter Chen goto err1; 627cea9657SPeter Chen } 637cea9657SPeter Chen 64448373d9SRoger Quadros if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)) 657cea9657SPeter Chen cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW; 667cea9657SPeter Chen 677cea9657SPeter Chen ret = platform_device_add_data(xhci, cdns->xhci_plat_data, 68ed227648SPeter Chen sizeof(struct xhci_plat_priv)); 69ed227648SPeter Chen if (ret) 707cea9657SPeter Chen goto free_memory; 71ed227648SPeter Chen 727733f6c3SPawel Laszczak ret = platform_device_add(xhci); 737733f6c3SPawel Laszczak if (ret) { 747733f6c3SPawel Laszczak dev_err(cdns->dev, "failed to register xHCI device\n"); 757cea9657SPeter Chen goto free_memory; 767733f6c3SPawel Laszczak } 777733f6c3SPawel Laszczak 78b1234e3bSPeter Chen /* Glue needs to access xHCI region register for Power management */ 79b1234e3bSPeter Chen hcd = platform_get_drvdata(xhci); 80b1234e3bSPeter Chen if (hcd) 81b1234e3bSPeter Chen cdns->xhci_regs = hcd->regs; 82b1234e3bSPeter Chen 837733f6c3SPawel Laszczak return 0; 847cea9657SPeter Chen 857cea9657SPeter Chen free_memory: 867cea9657SPeter Chen kfree(cdns->xhci_plat_data); 877733f6c3SPawel Laszczak err1: 887733f6c3SPawel Laszczak platform_device_put(xhci); 897733f6c3SPawel Laszczak return ret; 907733f6c3SPawel Laszczak } 917733f6c3SPawel Laszczak 92*88171f67SPawel Laszczak static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd) 93ed227648SPeter Chen { 94ed227648SPeter Chen struct xhci_hcd *xhci = hcd_to_xhci(hcd); 95ed227648SPeter Chen u32 value; 96ed227648SPeter Chen 97ed227648SPeter Chen if (pm_runtime_status_suspended(hcd->self.controller)) 98ed227648SPeter Chen return 0; 99ed227648SPeter Chen 100ed227648SPeter Chen /* set usbcmd.EU3S */ 101ed227648SPeter Chen value = readl(&xhci->op_regs->command); 102ed227648SPeter Chen value |= CMD_PM_INDEX; 103ed227648SPeter Chen writel(value, &xhci->op_regs->command); 104ed227648SPeter Chen 105ed227648SPeter Chen if (hcd->regs) { 106ed227648SPeter Chen value = readl(hcd->regs + XECP_AUX_CTRL_REG1); 107ed227648SPeter Chen value |= CFG_RXDET_P3_EN; 108ed227648SPeter Chen writel(value, hcd->regs + XECP_AUX_CTRL_REG1); 109ed227648SPeter Chen 110ed227648SPeter Chen value = readl(hcd->regs + XECP_PORT_CAP_REG); 111ed227648SPeter Chen value |= LPM_2_STB_SWITCH_EN; 112ed227648SPeter Chen writel(value, hcd->regs + XECP_PORT_CAP_REG); 113ed227648SPeter Chen } 114ed227648SPeter Chen 115ed227648SPeter Chen return 0; 116ed227648SPeter Chen } 117ed227648SPeter Chen 1180b490046SPawel Laszczak static void cdns_host_exit(struct cdns *cdns) 1197733f6c3SPawel Laszczak { 1207cea9657SPeter Chen kfree(cdns->xhci_plat_data); 1217733f6c3SPawel Laszczak platform_device_unregister(cdns->host_dev); 1227733f6c3SPawel Laszczak cdns->host_dev = NULL; 1230b490046SPawel Laszczak cdns_drd_host_off(cdns); 1247733f6c3SPawel Laszczak } 1257733f6c3SPawel Laszczak 1260b490046SPawel Laszczak int cdns_host_init(struct cdns *cdns) 1277733f6c3SPawel Laszczak { 1280b490046SPawel Laszczak struct cdns_role_driver *rdrv; 1297733f6c3SPawel Laszczak 1307733f6c3SPawel Laszczak rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); 1317733f6c3SPawel Laszczak if (!rdrv) 1327733f6c3SPawel Laszczak return -ENOMEM; 1337733f6c3SPawel Laszczak 1340b490046SPawel Laszczak rdrv->start = __cdns_host_init; 1350b490046SPawel Laszczak rdrv->stop = cdns_host_exit; 1360b490046SPawel Laszczak rdrv->state = CDNS_ROLE_STATE_INACTIVE; 1377733f6c3SPawel Laszczak rdrv->name = "host"; 1387733f6c3SPawel Laszczak 1397733f6c3SPawel Laszczak cdns->roles[USB_ROLE_HOST] = rdrv; 1407733f6c3SPawel Laszczak 1417733f6c3SPawel Laszczak return 0; 1427733f6c3SPawel Laszczak } 143