more ata stuff

kernel/drivers/atapi/ata.c

@@ -0,0 +1,42 @@
+#include "drivers/atapi/ata.h"
+
+#include "lib/print.h"
+
+#include <stddef.h>
+
+uint8_t selected_drive_primary = 0;
+uint8_t selected_drive_secondary = 0;
+
+uint8_t primary_master_info_buffer[512];
+uint8_t primary_slave_info_buffer[512];
+uint8_t secondary_master_info_buffer[512];
+uint8_t secondary_slave_info_buffer[512];
+
+ide_device_t ide_devices[4];
+
+void fix_ata_string(char* buf, size_t sz) {
+    if ((sz % 2) != 0) return;
+    for (size_t i = 0; i < sz; i += 2) {
+        char tmp = buf[i];
+        buf[i] = buf[i + 1];
+        buf[i + 1] = tmp;
+    }
+    buf[sz-1] = '\0'; 
+}
+
+void scan_drives() {
+    uint8_t type = ident_device(IDE_SECONDARY_IO_BASE, IDE_DRIVE_MASTER, secondary_master_info_buffer);
+    if (type == 2) {
+        ide_devices[0].bus = IDE_SECONDARY_IO_BASE;
+        ide_devices[0].device = IDE_DRIVE_MASTER;
+        ide_devices->type = type;
+
+        atapi_identify_data_t* ident_result = (atapi_identify_data_t*)secondary_master_info_buffer;
+        ide_devices->ident_info_struct = (void*)ident_result;
+
+        kprintf("Detected ATAPI master device on secondary bus\n");
+
+        fix_ata_string(ident_result->model_num, 40);
+        kprintf("Model Number: %s\n", ident_result->model_num);
+    }
+}