1 files changed, 98 insertions, 0 deletions
diff --git a/roms/skiboot/platforms/astbmc/pnor.c b/roms/skiboot/platforms/astbmc/pnor.c
new file mode 100644
index 000000000..64f2249d1
--- /dev/null
+++ b/roms/skiboot/platforms/astbmc/pnor.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+/* Copyright 2013-2019 IBM Corp. */
+
+#include <skiboot.h>
+#include <device.h>
+#include <console.h>
+#include <opal.h>
+#include <libflash/ipmi-hiomap.h>
+#include <libflash/mbox-flash.h>
+#include <libflash/libflash.h>
+#include <libflash/libffs.h>
+#include <libflash/blocklevel.h>
+#include <ast.h>
+
+#include "astbmc.h"
+
+enum ast_flash_style {
+    raw_flash,
+    raw_mem,
+    ipmi_hiomap,
+    mbox_hiomap,
+};
+
+static enum ast_flash_style ast_flash_get_fallback_style(void)
+{
+    if (ast_lpc_fw_mbox_hiomap())
+	return mbox_hiomap;
+
+    if (ast_lpc_fw_maps_flash())
+	return raw_flash;
+
+    return raw_mem;
+}
+
+int pnor_init(void)
+{
+	struct spi_flash_ctrl *pnor_ctrl = NULL;
+	struct blocklevel_device *bl = NULL;
+	enum ast_flash_style style;
+	int rc = 0;
+
+	if (ast_lpc_fw_ipmi_hiomap()) {
+		style = ipmi_hiomap;
+		rc = ipmi_hiomap_init(&bl);
+	}
+
+	if (!ast_lpc_fw_ipmi_hiomap() || rc) {
+		if (!ast_sio_is_enabled())
+			return -ENODEV;
+
+		style = ast_flash_get_fallback_style();
+		if (style == mbox_hiomap)
+			rc = mbox_flash_init(&bl);
+		else if (style == raw_flash)
+			rc = ast_sf_open(AST_SF_TYPE_PNOR, &pnor_ctrl);
+		else if (style == raw_mem)
+			rc = ast_sf_open(AST_SF_TYPE_MEM, &pnor_ctrl);
+		else {
+			prerror("Unhandled flash mode: %d\n", style);
+			return -ENODEV;
+		}
+	}
+
+	if (rc) {
+		prerror("PLAT: Failed to init PNOR driver\n");
+		goto fail;
+	}
+
+	if (style == raw_flash || style == raw_mem) {
+	    rc = flash_init(pnor_ctrl, &bl, NULL);
+	    if (rc)
+		goto fail;
+	}
+
+	rc = flash_register(bl);
+	if (!rc)
+		return 0;
+
+fail:
+	if (bl) {
+		switch (style) {
+		case raw_flash:
+		case raw_mem:
+			flash_exit(bl);
+			break;
+		case ipmi_hiomap:
+			ipmi_hiomap_exit(bl);
+			break;
+		case mbox_hiomap:
+			mbox_flash_exit(bl);
+			break;
+		}
+	}
+	if (pnor_ctrl)
+		ast_sf_close(pnor_ctrl);
+
+	return rc;
+}