# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1637430498 0
# Node ID 9f70dc110ad7152e6d16c3f2c77849622febb17a
# Parent  22ac331aa0f8a2819d961d1db71af15881c930e8
venus/src/usb: building blocks from DUART28

diff -r 22ac331aa0f8 -r 9f70dc110ad7 venus/src/usb/FT2232D_block.v
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/usb/FT2232D_block.v	Sat Nov 20 17:48:18 2021 +0000
@@ -0,0 +1,90 @@
+/*
+ * This module encapsulates the FT2232D chip and its immediate accessories:
+ * the oscillator crystal, the EEPROM, the AVCC filter and the cap on 3V3OUT.
+ */
+
+module FT2232D_block (GND, VCC, VCCIOA, VCCIOB,
+		      USBDP, USBDM, RESET, RSTOUT, PWREN,
+		      ADBUS, ACBUS, SI_WUA, BDBUS, BCBUS, SI_WUB);
+
+input GND, VCC, VCCIOA, VCCIOB;
+
+inout USBDP, USBDM;
+
+input RESET;
+output RSTOUT, PWREN;
+
+inout [7:0] ADBUS, BDBUS;
+inout [3:0] ACBUS, BCBUS;
+input SI_WUA, SI_WUB;
+
+/* FT2232D pins handled within this block */
+
+wire EECS, EESK, EEDATA;
+wire XTIN, XTOUT;
+wire AVCC, FTDI_3V3;
+
+/* instantiate the FT2232D */
+
+FT2232D_chip FT2232D   (.GND(GND),
+			.AGND(GND),
+			.VCC(VCC),
+			.AVCC(AVCC),
+			.VCCIOA(VCCIOA),
+			.VCCIOB(VCCIOB),
+			.OUT_3V3(FTDI_3V3),
+			.USBDP(USBDP),
+			.USBDM(USBDM),
+			.EECS(EECS),
+			.EESK(EESK),
+			.EEDATA(EEDATA),
+			.RESET(RESET),
+			.RSTOUT(RSTOUT),
+			.TEST(GND),
+			.PWREN(PWREN),
+			.XTIN(XTIN),
+			.XTOUT(XTOUT),
+			.ADBUS(ADBUS),
+			.ACBUS(ACBUS),
+			.SI_WUA(SI_WUA),
+			.BDBUS(BDBUS),
+			.BCBUS(BCBUS),
+			.SI_WUB(SI_WUB)
+	);
+
+/* VCCIO bypass caps */
+
+capacitor VCCIOA_bypass_cap (VCCIOA, GND);
+capacitor VCCIOB_bypass_cap (VCCIOB, GND);
+
+/* AVCC filter */
+
+resistor AVCC_filter_R (VCC, AVCC);
+capacitor AVCC_cap (AVCC, GND);
+
+/* 3V3OUT */
+
+capacitor FTDI_3V3_cap (FTDI_3V3, GND);
+
+/* crystal oscillator */
+
+xtal_2pin_pkg xtal (XTIN, XTOUT);
+capacitor XTIN_cap (XTIN, GND);
+capacitor XTOUT_cap (XTOUT, GND);
+
+/* serial EEPROM */
+
+wire EEPROM_DOUT;
+
+eeprom_93Cx6_16bit eeprom (.GND(GND),
+			   .VCC(VCC),
+			   .CS(EECS),
+			   .SK(EESK),
+			   .DIN(EEDATA),
+			   .DOUT(EEPROM_DOUT)
+	);
+
+resistor DOUT_series_R (EEPROM_DOUT, EEDATA);
+resistor DOUT_pullup_R (EEPROM_DOUT, VCC);
+
+endmodule
diff -r 22ac331aa0f8 -r 9f70dc110ad7 venus/src/usb/FT2232D_chip.v
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/usb/FT2232D_chip.v	Sat Nov 20 17:48:18 2021 +0000
@@ -0,0 +1,78 @@
+/*
+ * This module encapsulates the FT2232D chip and its pinout.
+ */
+
+module FT2232D_chip (GND, AGND, VCC, AVCC, VCCIOA, VCCIOB, OUT_3V3,
+		USBDP, USBDM, EECS, EESK, EEDATA, RESET, RSTOUT, TEST, PWREN,
+		XTIN, XTOUT, ADBUS, ACBUS, SI_WUA, BDBUS, BCBUS, SI_WUB);
+
+input GND, AGND, VCC, AVCC, VCCIOA, VCCIOB;
+output OUT_3V3;
+
+inout USBDP, USBDM;
+output EECS, EESK;
+inout EEDATA;
+
+input RESET, TEST;
+output RSTOUT, PWREN;
+
+input XTIN;
+output XTOUT;
+
+inout [7:0] ADBUS, BDBUS;
+inout [3:0] ACBUS, BCBUS;
+input SI_WUA, SI_WUB;
+
+/* instantiate the package; the mapping of signals to pins is defined here */
+
+pkg_LQFP48 pkg (.pin_1(EESK),
+		.pin_2(EEDATA),
+		.pin_3(VCC),
+		.pin_4(RESET),
+		.pin_5(RSTOUT),
+		.pin_6(OUT_3V3),
+		.pin_7(USBDP),
+		.pin_8(USBDM),
+		.pin_9(GND),
+		.pin_10(SI_WUA),
+		.pin_11(ACBUS[3]),
+		.pin_12(ACBUS[2]),
+		.pin_13(ACBUS[1]),
+		.pin_14(VCCIOA),
+		.pin_15(ACBUS[0]),
+		.pin_16(ADBUS[7]),
+		.pin_17(ADBUS[6]),
+		.pin_18(GND),
+		.pin_19(ADBUS[5]),
+		.pin_20(ADBUS[4]),
+		.pin_21(ADBUS[3]),
+		.pin_22(ADBUS[2]),
+		.pin_23(ADBUS[1]),
+		.pin_24(ADBUS[0]),
+		.pin_25(GND),
+		.pin_26(SI_WUB),
+		.pin_27(BCBUS[3]),
+		.pin_28(BCBUS[2]),
+		.pin_29(BCBUS[1]),
+		.pin_30(BCBUS[0]),
+		.pin_31(VCCIOB),
+		.pin_32(BDBUS[7]),
+		.pin_33(BDBUS[6]),
+		.pin_34(GND),
+		.pin_35(BDBUS[5]),
+		.pin_36(BDBUS[4]),
+		.pin_37(BDBUS[3]),
+		.pin_38(BDBUS[2]),
+		.pin_39(BDBUS[1]),
+		.pin_40(BDBUS[0]),
+		.pin_41(PWREN),
+		.pin_42(VCC),
+		.pin_43(XTIN),
+		.pin_44(XTOUT),
+		.pin_45(AGND),
+		.pin_46(AVCC),
+		.pin_47(TEST),
+		.pin_48(EECS)
+	);
+
+endmodule
diff -r 22ac331aa0f8 -r 9f70dc110ad7 venus/src/usb/eeprom_93Cx6_16bit.v
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/usb/eeprom_93Cx6_16bit.v	Sat Nov 20 17:48:18 2021 +0000
@@ -0,0 +1,19 @@
+module eeprom_93Cx6_16bit (GND, VCC, CS, SK, DIN, DOUT);
+
+input GND, VCC;
+input CS, SK, DIN;
+output DOUT;
+
+/* instantiate the package; the mapping of signals to pins is defined here */
+
+pkg_IC_8pin pkg (.pin_1(CS),
+		 .pin_2(SK),
+		 .pin_3(DIN),
+		 .pin_4(DOUT),
+		 .pin_5(GND),
+		 .pin_6(VCC),	/* ORG input on some 93Cx6 variants */
+		 .pin_7(),	/* no connect */
+		 .pin_8(VCC)
+	);
+
+endmodule
diff -r 22ac331aa0f8 -r 9f70dc110ad7 venus/src/usb/regulator_ic.v
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/usb/regulator_ic.v	Sat Nov 20 17:48:18 2021 +0000
@@ -0,0 +1,13 @@
+module regulator_ic (IN, OUT, GND, EN);
+
+input IN, GND, EN;
+output OUT;
+
+pkg_IC_5pin pkg (.pin_1(IN),
+		 .pin_2(GND),
+		 .pin_3(EN),
+		 .pin_4(),	/* no connect */
+		 .pin_5(OUT)
+	);
+
+endmodule
diff -r 22ac331aa0f8 -r 9f70dc110ad7 venus/src/usb/usb_conn.v
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/usb/usb_conn.v	Sat Nov 20 17:48:18 2021 +0000
@@ -0,0 +1,21 @@
+/*
+ * This module captures the mini-USB connector.
+ */
+
+module usb_conn (GND, VBUS, Dminus, Dplus, ID);
+
+inout GND, VBUS, Dminus, Dplus, ID;
+
+conn_miniUSB_plus4 conn (.pin_1(VBUS),
+			 .pin_2(Dminus),
+			 .pin_3(Dplus),
+			 .pin_4(ID),
+			 .pin_5(GND),
+			 /* mounting pads */
+			 .pin_6(GND),
+			 .pin_7(GND),
+			 .pin_8(GND),
+			 .pin_9(GND)
+	);
+
+endmodule