From 635bee2d21704fd76d066be0f66ce2c70ebaacb7 Mon Sep 17 00:00:00 2001
From: Ian McIntyre <me@mciantyre.dev>
Date: Sun, 30 Nov 2025 19:56:39 -0500
Subject: First commit

---
 src/flash/winbond.rs | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/flash/winbond.rs

(limited to 'src/flash/winbond.rs')

diff --git a/src/flash/winbond.rs b/src/flash/winbond.rs
new file mode 100644
index 0000000..afac605
--- /dev/null
+++ b/src/flash/winbond.rs
@@ -0,0 +1,92 @@
+//! Winbond Serial NOR Flash.
+
+use super::*;
+use crate::{ImxrtFlashAlgorithm, sequences::common as sequences};
+
+pub type W25q64 = Winbond<{ 64 / 8 * 1024 * 1024 }>;
+
+/// A Winbond serial NOR flash driver.
+pub struct Winbond<const FLASH_CAPACITY_BYTES: usize>;
+
+impl<const FLASH_CAPACITY_BYTES: usize> ImxrtFlashAlgorithm for Winbond<FLASH_CAPACITY_BYTES> {
+    const FLASH_CAPACITY_BYTES: usize = FLASH_CAPACITY_BYTES;
+    const FLASH_PAGE_SIZE_BYTES: usize = 256;
+    const FLASH_SECTOR_SIZE_BYTES: usize = 4096;
+
+    fn initialize(flexspi: imxrt_drivers_flexspi::Instance) {
+        defmt::assert_eq!(
+            READ,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                READ.seq_id,
+                &[sequences::seq_fast_read_quad_io(6)],
+            ))
+        );
+
+        defmt::assert_eq!(
+            SET_READ_PARAMS,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                SET_READ_PARAMS.seq_id,
+                &[sequences::SEQ_SET_READ_PARAMS_VOL]
+            ))
+        );
+
+        defmt::assert_eq!(
+            WRITE_ENABLE,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                WRITE_ENABLE.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE]
+            ))
+        );
+
+        defmt::assert_eq!(
+            ERASE_SECTOR,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                ERASE_SECTOR.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_SECTOR]
+            ))
+        );
+
+        defmt::assert_eq!(
+            READ_STATUS,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                READ_STATUS.seq_id,
+                &[sequences::SEQ_READ_STATUS]
+            ))
+        );
+
+        defmt::assert_eq!(
+            PAGE_PROGRAM,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                PAGE_PROGRAM.seq_id,
+                &[
+                    sequences::SEQ_WRITE_ENABLE,
+                    sequences::SEQ_PAGE_PROGRAM_QUAD_INPUT
+                ]
+            ))
+        );
+
+        defmt::assert_eq!(
+            CHIP_ERASE,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                CHIP_ERASE.seq_id,
+                &[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_CHIP]
+            ))
+        );
+
+        defmt::assert_eq!(
+            RESET,
+            defmt::unwrap!(crate::install_ip_cmd(
+                flexspi,
+                RESET.seq_id,
+                &[sequences::SEQ_RSTEN, sequences::SEQ_RST]
+            ))
+        );
+    }
+}
-- 
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