From f308d7d28ca8d1d06a9cdca928f06086dfd4e26c Mon Sep 17 00:00:00 2001
From: deadprogram <ron@hybridgroup.com>
Date: Fri, 20 May 2022 10:56:40 +0200
Subject: [PATCH] machine/badger2040: support for Badger 2040

Signed-off-by: deadprogram <ron@hybridgroup.com>
---
 src/machine/board_badger2040.go | 81 +++++++++++++++++++++++++++++++++
 targets/badger2040.json         | 11 +++++
 targets/badger2040.ld           | 10 ++++
 3 files changed, 102 insertions(+)
 create mode 100644 src/machine/board_badger2040.go
 create mode 100644 targets/badger2040.json
 create mode 100644 targets/badger2040.ld

diff --git a/src/machine/board_badger2040.go b/src/machine/board_badger2040.go
new file mode 100644
index 00000000..d2b41122
--- /dev/null
+++ b/src/machine/board_badger2040.go
@@ -0,0 +1,81 @@
+//go:build badger2040
+// +build badger2040
+
+// This contains the pin mappings for the Badger 2040 Connect board.
+//
+// For more information, see: https://shop.pimoroni.com/products/badger-2040
+// Also
+// - Badger 2040 schematic: https://cdn.shopify.com/s/files/1/0174/1800/files/badger_2040_schematic.pdf?v=1645702148
+//
+package machine
+
+const (
+	LED Pin = GPIO25
+
+	BUTTON_A    Pin = GPIO12
+	BUTTON_B    Pin = GPIO13
+	BUTTON_C    Pin = GPIO14
+	BUTTON_UP   Pin = GPIO15
+	BUTTON_DOWN Pin = GPIO11
+	BUTTON_USER Pin = GPIO23
+
+	EPD_BUSY_PIN  Pin = GPIO26
+	EPD_RESET_PIN Pin = GPIO21
+	EPD_DC_PIN    Pin = GPIO20
+	EPD_CS_PIN    Pin = GPIO17
+	EPD_SCK_PIN   Pin = GPIO18
+	EPD_SDO_PIN   Pin = GPIO19
+
+	VBUS_DETECT Pin = GPIO24
+	BATTERY     Pin = GPIO29
+	ENABLE_3V3  Pin = GPIO10
+)
+
+// I2C pins
+const (
+	I2C0_SDA_PIN Pin = GPIO4
+	I2C0_SCL_PIN Pin = GPIO5
+
+	I2C1_SDA_PIN Pin = NoPin
+	I2C1_SCL_PIN Pin = NoPin
+)
+
+// SPI pins.
+const (
+	SPI0_SCK_PIN Pin = GPIO18
+	SPI0_SDO_PIN Pin = GPIO19
+	SPI0_SDI_PIN Pin = GPIO16
+
+	SPI1_SCK_PIN Pin = NoPin
+	SPI1_SDO_PIN Pin = NoPin
+	SPI1_SDI_PIN Pin = NoPin
+)
+
+// QSPI pins¿?
+const (
+/* TODO
+SPI0_SD0_PIN Pin = QSPI_SD0
+SPI0_SD1_PIN Pin = QSPI_SD1
+SPI0_SD2_PIN Pin = QSPI_SD2
+SPI0_SD3_PIN Pin = QSPI_SD3
+SPI0_SCK_PIN Pin = QSPI_SCLKGPIO6
+SPI0_CS_PIN  Pin = QSPI_CS
+
+*/
+)
+
+// Onboard crystal oscillator frequency, in MHz.
+const (
+	xoscFreq = 12 // MHz
+)
+
+// USB CDC identifiers
+const (
+	usb_STRING_PRODUCT      = "Badger 2040"
+	usb_STRING_MANUFACTURER = "Pimoroni"
+)
+
+var (
+	usb_VID uint16 = 0x2e8a
+	usb_PID uint16 = 0x0003
+)
diff --git a/targets/badger2040.json b/targets/badger2040.json
new file mode 100644
index 00000000..340a8b5b
--- /dev/null
+++ b/targets/badger2040.json
@@ -0,0 +1,11 @@
+{
+    "inherits": [
+        "rp2040"
+    ],
+    "serial": "uart",
+    "build-tags": ["badger2040"],
+    "linkerscript": "targets/badger2040.ld",
+    "extra-files": [
+        "targets/pico-boot-stage2.S"
+    ]
+}
diff --git a/targets/badger2040.ld b/targets/badger2040.ld
new file mode 100644
index 00000000..7e06d7a0
--- /dev/null
+++ b/targets/badger2040.ld
@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    /* Reserve exactly 256 bytes at start of flash for second stage bootloader */
+    BOOT2_TEXT (rx) : ORIGIN = 0x10000000, LENGTH = 256
+    FLASH_TEXT (rx) : ORIGIN = 0x10000000 + 256, LENGTH = 1020K - 256
+    RAM (rwx)       : ORIGIN = 0x20000000, LENGTH = 256k
+}
+
+INCLUDE "targets/rp2040.ld"