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diff --git a/Marlin/src/sd/usb_flashdrive/lib-uhs2/max3421e.h b/Marlin/src/sd/usb_flashdrive/lib-uhs2/max3421e.h
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+/**
+ * Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Contact information
+ * -------------------
+ *
+ * Circuits At Home, LTD
+ * Web      :  https://www.circuitsathome.com
+ * e-mail   :  support@circuitsathome.com
+ */
+#pragma once
+
+#ifndef _usb_h_
+  #error "Never include max3421e.h directly; include Usb.h instead"
+#endif
+
+/* MAX3421E register/bit names and bitmasks */
+
+/* Arduino pin definitions */
+/* pin numbers to port numbers */
+
+#define SE0     0
+#define SE1     1
+#define FSHOST  2
+#define LSHOST  3
+
+/* MAX3421E command byte format: rrrrr0wa where 'r' is register number  */
+//
+// MAX3421E Registers in HOST mode.
+//
+#define rRCVFIFO    0x08    //1<<3
+#define rSNDFIFO    0x10    //2<<3
+#define rSUDFIFO    0x20    //4<<3
+#define rRCVBC      0x30    //6<<3
+#define rSNDBC      0x38    //7<<3
+
+#define rUSBIRQ     0x68    //13<<3
+/* USBIRQ Bits  */
+#define bmVBUSIRQ   0x40    //b6
+#define bmNOVBUSIRQ 0x20    //b5
+#define bmOSCOKIRQ  0x01    //b0
+
+#define rUSBIEN     0x70    //14<<3
+/* USBIEN Bits  */
+#define bmVBUSIE    0x40    //b6
+#define bmNOVBUSIE  0x20    //b5
+#define bmOSCOKIE   0x01    //b0
+
+#define rUSBCTL     0x78    //15<<3
+/* USBCTL Bits  */
+#define bmCHIPRES   0x20    //b5
+#define bmPWRDOWN   0x10    //b4
+
+#define rCPUCTL     0x80    //16<<3
+/* CPUCTL Bits  */
+#define bmPUSLEWID1 0x80    //b7
+#define bmPULSEWID0 0x40    //b6
+#define bmIE        0x01    //b0
+
+#define rPINCTL     0x88    //17<<3
+/* PINCTL Bits  */
+#define bmFDUPSPI   0x10    //b4
+#define bmINTLEVEL  0x08    //b3
+#define bmPOSINT    0x04    //b2
+#define bmGPXB      0x02    //b1
+#define bmGPXA      0x01    //b0
+// GPX pin selections
+#define GPX_OPERATE 0x00
+#define GPX_VBDET   0x01
+#define GPX_BUSACT  0x02
+#define GPX_SOF     0x03
+
+#define rREVISION   0x90    //18<<3
+
+#define rIOPINS1    0xA0    //20<<3
+
+/* IOPINS1 Bits */
+#define bmGPOUT0    0x01
+#define bmGPOUT1    0x02
+#define bmGPOUT2    0x04
+#define bmGPOUT3    0x08
+#define bmGPIN0     0x10
+#define bmGPIN1     0x20
+#define bmGPIN2     0x40
+#define bmGPIN3     0x80
+
+#define rIOPINS2    0xA8    //21<<3
+/* IOPINS2 Bits */
+#define bmGPOUT4    0x01
+#define bmGPOUT5    0x02
+#define bmGPOUT6    0x04
+#define bmGPOUT7    0x08
+#define bmGPIN4     0x10
+#define bmGPIN5     0x20
+#define bmGPIN6     0x40
+#define bmGPIN7     0x80
+
+#define rGPINIRQ    0xB0    //22<<3
+/* GPINIRQ Bits */
+#define bmGPINIRQ0 0x01
+#define bmGPINIRQ1 0x02
+#define bmGPINIRQ2 0x04
+#define bmGPINIRQ3 0x08
+#define bmGPINIRQ4 0x10
+#define bmGPINIRQ5 0x20
+#define bmGPINIRQ6 0x40
+#define bmGPINIRQ7 0x80
+
+#define rGPINIEN    0xB8    //23<<3
+/* GPINIEN Bits */
+#define bmGPINIEN0 0x01
+#define bmGPINIEN1 0x02
+#define bmGPINIEN2 0x04
+#define bmGPINIEN3 0x08
+#define bmGPINIEN4 0x10
+#define bmGPINIEN5 0x20
+#define bmGPINIEN6 0x40
+#define bmGPINIEN7 0x80
+
+#define rGPINPOL    0xC0    //24<<3
+/* GPINPOL Bits */
+#define bmGPINPOL0 0x01
+#define bmGPINPOL1 0x02
+#define bmGPINPOL2 0x04
+#define bmGPINPOL3 0x08
+#define bmGPINPOL4 0x10
+#define bmGPINPOL5 0x20
+#define bmGPINPOL6 0x40
+#define bmGPINPOL7 0x80
+
+#define rHIRQ       0xC8    //25<<3
+/* HIRQ Bits */
+#define bmBUSEVENTIRQ   0x01   // indicates BUS Reset Done or BUS Resume
+#define bmRWUIRQ        0x02
+#define bmRCVDAVIRQ     0x04
+#define bmSNDBAVIRQ     0x08
+#define bmSUSDNIRQ      0x10
+#define bmCONDETIRQ     0x20
+#define bmFRAMEIRQ      0x40
+#define bmHXFRDNIRQ     0x80
+
+#define rHIEN           0xD0    //26<<3
+
+/* HIEN Bits */
+#define bmBUSEVENTIE    0x01
+#define bmRWUIE         0x02
+#define bmRCVDAVIE      0x04
+#define bmSNDBAVIE      0x08
+#define bmSUSDNIE       0x10
+#define bmCONDETIE      0x20
+#define bmFRAMEIE       0x40
+#define bmHXFRDNIE      0x80
+
+#define rMODE           0xD8    //27<<3
+
+/* MODE Bits */
+#define bmHOST          0x01
+#define bmLOWSPEED      0x02
+#define bmHUBPRE        0x04
+#define bmSOFKAENAB     0x08
+#define bmSEPIRQ        0x10
+#define bmDELAYISO      0x20
+#define bmDMPULLDN      0x40
+#define bmDPPULLDN      0x80
+
+#define rPERADDR    0xE0    //28<<3
+
+#define rHCTL       0xE8    //29<<3
+/* HCTL Bits */
+#define bmBUSRST        0x01
+#define bmFRMRST        0x02
+#define bmSAMPLEBUS     0x04
+#define bmSIGRSM        0x08
+#define bmRCVTOG0       0x10
+#define bmRCVTOG1       0x20
+#define bmSNDTOG0       0x40
+#define bmSNDTOG1       0x80
+
+#define rHXFR       0xF0    //30<<3
+
+#undef tokSETUP
+#undef tokIN
+#undef tokOUT
+#undef tokINHS
+#undef tokOUTHS
+#undef tokISOIN
+#undef tokISOOUT
+
+/* Host transfer token values for writing the HXFR register (R30)   */
+/* OR this bit field with the endpoint number in bits 3:0               */
+#define tokSETUP  0x10  // HS=0, ISO=0, OUTNIN=0, SETUP=1
+#define tokIN     0x00  // HS=0, ISO=0, OUTNIN=0, SETUP=0
+#define tokOUT    0x20  // HS=0, ISO=0, OUTNIN=1, SETUP=0
+#define tokINHS   0x80  // HS=1, ISO=0, OUTNIN=0, SETUP=0
+#define tokOUTHS  0xA0  // HS=1, ISO=0, OUTNIN=1, SETUP=0
+#define tokISOIN  0x40  // HS=0, ISO=1, OUTNIN=0, SETUP=0
+#define tokISOOUT 0x60  // HS=0, ISO=1, OUTNIN=1, SETUP=0
+
+#define rHRSL       0xF8    //31<<3
+
+/* HRSL Bits */
+#define bmRCVTOGRD  0x10
+#define bmSNDTOGRD  0x20
+#define bmKSTATUS   0x40
+#define bmJSTATUS   0x80
+#define bmSE0       0x00    //SE0 - disconnect state
+#define bmSE1       0xC0    //SE1 - illegal state
+
+/* Host error result codes, the 4 LSB's in the HRSL register */
+#define hrSUCCESS   0x00
+#define hrBUSY      0x01
+#define hrBADREQ    0x02
+#define hrUNDEF     0x03
+#define hrNAK       0x04
+#define hrSTALL     0x05
+#define hrTOGERR    0x06
+#define hrWRONGPID  0x07
+#define hrBADBC     0x08
+#define hrPIDERR    0x09
+#define hrPKTERR    0x0A
+#define hrCRCERR    0x0B
+#define hrKERR      0x0C
+#define hrJERR      0x0D
+#define hrTIMEOUT   0x0E
+#define hrBABBLE    0x0F
+
+#define MODE_FS_HOST    (bmDPPULLDN|bmDMPULLDN|bmHOST|bmSOFKAENAB)
+#define MODE_LS_HOST    (bmDPPULLDN|bmDMPULLDN|bmHOST|bmLOWSPEED|bmSOFKAENAB)