Clean: harmonizing & header-commenting code

src/drivers/ata.h

@@ -1,8 +1,34 @@
+// ATA PIO driver implementation header
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https//github.com/xamidev/blankos
+
 #ifndef ATA_H
 #define ATA_H
 
 #include <stdint.h>
 
+#define ATA_PRIMARY_IO 		0x1F0
+#define ATA_PRIMARY_CTRL 	0x3F6
+#define ATA_CMD_READ_PIO	0x20
+#define ATA_CMD_WRITE_PIO 	0x30
+#define ATA_IDENTIFY 		0xEC
+
+#define ATA_REG_DATA 		0x00
+#define ATA_REG_ERROR 		0x01
+#define ATA_REG_SECCOUNT0 	0x02
+#define ATA_REG_LBA0 		0x03
+#define ATA_REG_LBA1 		0x04
+#define ATA_REG_LBA2 		0x05
+#define ATA_REG_HDDEVSEL 	0x06
+#define ATA_REG_COMMAND 	0x07
+#define ATA_REG_STATUS 		0x07
+
+#define ATA_SR_BSY 		    0x80
+#define ATA_SR_DRDY 		0x40
+#define ATA_SR_DRQ 		    0x08
+#define ATA_SR_ERR 		    0x01
+
 void ata_read_sector(uint32_t lba, uint8_t* buffer);
 void test_read_sector();