refactor common parts into inc/ch375.h and add win9x, linux drivers

1 files changed, 76 insertions, 0 deletions

diff --git a/linux/ch375lnx.h b/linux/ch375lnx.h
new file mode 100644
index 0000000..e9309a2
--- /dev/null
+++ b/linux/ch375lnx.h
@@ -0,0 +1,76 @@
+/*
+ * CHU - IO routines to CH375 from a Linux kernel module
+ * Copyright (C) 2026 Javier S. Pedro
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef CH375LNX_H
+#define CH375LNX_H
+
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <asm/io.h>
+#define _Packed __attribute__ ((packed))
+typedef enum {
+	false = 0,
+	true = 1
+} bool;
+
+#include <ch375.h>
+
+struct ch375 {
+	uint16_t io_base;
+	uint16_t sec_size;
+};
+
+static inline uint8_t ch375_read_data(struct ch375 *dev)
+{
+	return inb(dev->io_base + CH375_PORT_DATA);
+}
+
+static inline void ch375_write_data(struct ch375 *dev, uint8_t data)
+{
+	outb(data, dev->io_base + CH375_PORT_DATA);
+}
+
+static inline void ch375_send_command(struct ch375 *dev, enum ch375_command cmd)
+{
+	outb(cmd, dev->io_base + CH375_PORT_CMD);
+}
+
+/// True if interrupt line is currently active (i.e. low)
+static inline bool ch375_poll_interrupt(struct ch375 *dev)
+{
+	return !(inb(dev->io_base + CH375_PORT_CMD) & 0x80);
+}
+
+/** Reads one transfer block (64 bytes max). */
+static uint8_t ch375_read_data_block(struct ch375 *dev, uint8_t *buffer)
+{
+	uint8_t n = ch375_read_data(dev);
+
+	insb(dev->io_base + CH375_PORT_DATA, buffer, n);
+
+	return n;
+}
+
+static void ch375_write_data_block(struct ch375 *dev, uint8_t * buffer, uint8_t n)
+{
+	ch375_write_data(dev, n);
+
+	outsb(dev->io_base + CH375_PORT_DATA, buffer, n);
+}
+
+#endif // CH375LNX_H