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18a6be6743
host.c file has some parts of code that were introduced for CDNS3 driver
and should not be used with CDNSP driver.
This patch blocks using these parts of codes by CDNSP driver.
These elements include:
- xhci_plat_cdns3_xhci object
- cdns3 specific XECP_PORT_CAP_REG register
- cdns3 specific XECP_AUX_CTRL_REG1 register
cc: stable@vger.kernel.org
Fixes: 3d82904559 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20240206104018.48272-1-pawell@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Cadence USBSS and USBSSP DRD Driver - host side
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*
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* Copyright (C) 2018-2019 Cadence Design Systems.
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* Copyright (C) 2017-2018 NXP
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*
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* Authors: Peter Chen <peter.chen@nxp.com>
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* Pawel Laszczak <pawell@cadence.com>
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*/
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "core.h"
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#include "drd.h"
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#include "host-export.h"
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#include <linux/usb/hcd.h>
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#include "../host/xhci.h"
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#include "../host/xhci-plat.h"
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/*
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* The XECP_PORT_CAP_REG and XECP_AUX_CTRL_REG1 exist only
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* in Cadence USB3 dual-role controller, so it can't be used
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* with Cadence CDNSP dual-role controller.
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*/
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#define XECP_PORT_CAP_REG 0x8000
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#define XECP_AUX_CTRL_REG1 0x8120
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#define CFG_RXDET_P3_EN BIT(15)
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#define LPM_2_STB_SWITCH_EN BIT(25)
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static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
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{
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struct xhci_hcd *xhci = hcd_to_xhci(hcd);
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u32 value;
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/* set usbcmd.EU3S */
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value = readl(&xhci->op_regs->command);
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value |= CMD_PM_INDEX;
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writel(value, &xhci->op_regs->command);
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if (hcd->regs) {
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value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
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value |= CFG_RXDET_P3_EN;
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writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
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value = readl(hcd->regs + XECP_PORT_CAP_REG);
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value |= LPM_2_STB_SWITCH_EN;
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writel(value, hcd->regs + XECP_PORT_CAP_REG);
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}
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}
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static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
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{
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xhci_cdns3_plat_start(hcd);
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return 0;
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}
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static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
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.quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
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.plat_start = xhci_cdns3_plat_start,
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.resume_quirk = xhci_cdns3_resume_quirk,
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};
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static const struct xhci_plat_priv xhci_plat_cdnsp_xhci;
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static int __cdns_host_init(struct cdns *cdns)
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{
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struct platform_device *xhci;
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int ret;
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struct usb_hcd *hcd;
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cdns_drd_host_on(cdns);
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xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
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if (!xhci) {
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dev_err(cdns->dev, "couldn't allocate xHCI device\n");
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return -ENOMEM;
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}
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xhci->dev.parent = cdns->dev;
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cdns->host_dev = xhci;
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ret = platform_device_add_resources(xhci, cdns->xhci_res,
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CDNS_XHCI_RESOURCES_NUM);
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if (ret) {
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dev_err(cdns->dev, "couldn't add resources to xHCI device\n");
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goto err1;
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}
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if (cdns->version < CDNSP_CONTROLLER_V2)
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cdns->xhci_plat_data = kmemdup(&xhci_plat_cdns3_xhci,
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sizeof(struct xhci_plat_priv), GFP_KERNEL);
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else
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cdns->xhci_plat_data = kmemdup(&xhci_plat_cdnsp_xhci,
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sizeof(struct xhci_plat_priv), GFP_KERNEL);
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if (!cdns->xhci_plat_data) {
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ret = -ENOMEM;
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goto err1;
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}
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if (cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW))
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cdns->xhci_plat_data->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
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ret = platform_device_add_data(xhci, cdns->xhci_plat_data,
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sizeof(struct xhci_plat_priv));
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if (ret)
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goto free_memory;
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ret = platform_device_add(xhci);
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if (ret) {
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dev_err(cdns->dev, "failed to register xHCI device\n");
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goto free_memory;
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}
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/* Glue needs to access xHCI region register for Power management */
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hcd = platform_get_drvdata(xhci);
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if (hcd)
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cdns->xhci_regs = hcd->regs;
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return 0;
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free_memory:
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kfree(cdns->xhci_plat_data);
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err1:
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platform_device_put(xhci);
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return ret;
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}
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static void cdns_host_exit(struct cdns *cdns)
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{
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kfree(cdns->xhci_plat_data);
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platform_device_unregister(cdns->host_dev);
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cdns->host_dev = NULL;
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cdns_drd_host_off(cdns);
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}
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int cdns_host_init(struct cdns *cdns)
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{
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struct cdns_role_driver *rdrv;
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rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);
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if (!rdrv)
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return -ENOMEM;
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rdrv->start = __cdns_host_init;
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rdrv->stop = cdns_host_exit;
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rdrv->state = CDNS_ROLE_STATE_INACTIVE;
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rdrv->name = "host";
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cdns->roles[USB_ROLE_HOST] = rdrv;
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return 0;
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}
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