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| author | Pawel Laszczak <pawell@cadence.com> | 2020-12-07 11:32:24 +0100 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2020-12-29 12:36:13 +0800 |
| commit | 3d82904559f4f5a2622db1b21de3edf2eded7664 (patch) | |
| tree | a06f42704976fa6b5fed6178416fcea7cf9eee6e /drivers/usb/cdns3/core.c | |
| parent | e93e58d2740282d32c0278fab283eb0ae158bb59 (diff) | |
| download | linux-3d82904559f4f5a2622db1b21de3edf2eded7664.tar.gz linux-3d82904559f4f5a2622db1b21de3edf2eded7664.tar.bz2 linux-3d82904559f4f5a2622db1b21de3edf2eded7664.zip | |
usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver
This patch introduces the main part of Cadence USBSSP DRD driver
to Linux kernel.
To reduce the patch size a little bit, the header file gadget.h was
intentionally added as separate patch.
The Cadence USBSSP DRD Controller is a highly configurable IP Core which
can be instantiated as Dual-Role Device (DRD), Peripheral Only and
Host Only (XHCI)configurations.
The current driver has been validated with FPGA platform. We have
support for PCIe bus, which is used on FPGA prototyping.
The host side of USBSS DRD controller is compliant with XHCI.
The architecture for device side is almost the same as for host side,
and most of the XHCI specification can be used to understand how
this controller operates.
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb/cdns3/core.c')
| -rw-r--r-- | drivers/usb/cdns3/core.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index 85c491f4c6d5..199713769289 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Cadence USBSS DRD Driver. + * Cadence USBSS and USBSSP DRD Driver. * * Copyright (C) 2018-2019 Cadence. * Copyright (C) 2017-2018 NXP @@ -136,7 +136,14 @@ static int cdns_core_init_role(struct cdns *cdns) dr_mode = best_dr_mode; if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { - ret = cdns_host_init(cdns); + if ((cdns->version == CDNSP_CONTROLLER_V2 && + IS_ENABLED(CONFIG_USB_CDNSP_HOST)) || + (cdns->version < CDNSP_CONTROLLER_V2 && + IS_ENABLED(CONFIG_USB_CDNS3_HOST))) + ret = cdns_host_init(cdns); + else + ret = -ENXIO; + if (ret) { dev_err(dev, "Host initialization failed with %d\n", ret); |