drivers/usb/host/xhci-rcar.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * drivers/usb/host/xhci-rcar.h
   4  *
   5  * Copyright (C) 2014 Renesas Electronics Corporation
   6  */
   7
   8 #ifndef _XHCI_RCAR_H
   9 #define _XHCI_RCAR_H
  10
  11 #define XHCI_RCAR_FIRMWARE_NAME_V1      "r8a779x_usb3_v1.dlmem"
  12 #define XHCI_RCAR_FIRMWARE_NAME_V2      "r8a779x_usb3_v2.dlmem"
  13 #define XHCI_RCAR_FIRMWARE_NAME_V3      "r8a779x_usb3_v3.dlmem"
  14
  15 #if IS_ENABLED(CONFIG_USB_XHCI_RCAR)
  16 void xhci_rcar_start(struct usb_hcd *hcd);
  17 int xhci_rcar_init_quirk(struct usb_hcd *hcd);
  18 int xhci_rcar_resume_quirk(struct usb_hcd *hcd);
  19 #else
  20 static inline void xhci_rcar_start(struct usb_hcd *hcd)
  21 {
  22 }
  23
  24 static inline int xhci_rcar_init_quirk(struct usb_hcd *hcd)
  25 {
  26         return 0;
  27 }
  28
  29 static inline int xhci_rcar_resume_quirk(struct usb_hcd *hcd)
  30 {
  31         return 0;
  32 }
  33 #endif
  34
  35 /*
  36  * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
  37  * to 1. However, these SoCs don't support 64-bit address memory
  38  * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
  39  * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
  40  * xhci_gen_setup() by using the XHCI_NO_64BIT_SUPPORT quirk.
  41  *
  42  * And, since the firmware/internal CPU control the USBSTS.STS_HALT
  43  * and the process speed is down when the roothub port enters U3,
  44  * long delay for the handshake of STS_HALT is neeed in xhci_suspend()
  45  * by using the XHCI_SLOW_SUSPEND quirk.
  46  */
  47 #define SET_XHCI_PLAT_PRIV_FOR_RCAR(firmware)                           \
  48         .firmware_name = firmware,                                      \
  49         .quirks = XHCI_NO_64BIT_SUPPORT | XHCI_TRUST_TX_LENGTH |        \
  50                   XHCI_SLOW_SUSPEND,                                    \
  51         .init_quirk = xhci_rcar_init_quirk,                             \
  52         .plat_start = xhci_rcar_start,                                  \
  53         .resume_quirk = xhci_rcar_resume_quirk,
  54
  55 #endif /* _XHCI_RCAR_H */