vbe: Add a bootmeth driver for abrec

Add a VBE-ABrec bootmeth so that the VBE state can be accessed. Series-changes: 2 - Add new patch with a bootmeth driver for abrec Signed-off-by: Simon Glass <sjg@chromium.org>
2025-02-08 14:27:15 -07:00
parent 768b87d25b
commit f893dfc3a9
1 changed files with 99 additions and 0 deletions
--- a/boot/vbe_abrec.c
+++ b/boot/vbe_abrec.c
@@ -8,6 +8,7 @@

 #define LOG_CATEGORY LOGC_BOOT

+#include <bootmeth.h>
 #include <dm.h>
 #include <memalign.h>
 #include <mmc.h>
@@ -81,3 +82,101 @@ int abrec_read_state(struct udevice *dev, struct abrec_state *state)

 	return 0;
 }
+
+static int vbe_abrec_get_state_desc(struct udevice *dev, char *buf,
+				    int maxsize)
+{
+	struct abrec_state state;
+	int ret;
+
+	ret = abrec_read_state(dev, &state);
+	if (ret)
+		return log_msg_ret("read", ret);
+
+	if (maxsize < 30)
+		return -ENOSPC;
+	snprintf(buf, maxsize, "Version: %s\nVernum: %x/%x", state.fw_version,
+		 state.fw_vernum >> FWVER_KEY_SHIFT,
+		 state.fw_vernum & FWVER_FW_MASK);
+
+	return 0;
+}
+
+static int vbe_abrec_read_bootflow(struct udevice *dev, struct bootflow *bflow)
+{
+	int ret;
+
+	if (CONFIG_IS_ENABLED(BOOTMETH_VBE_ABREC_FW)) {
+		if (vbe_phase() == VBE_PHASE_FIRMWARE) {
+			ret = abrec_read_bootflow_fw(dev, bflow);
+			if (ret)
+				return log_msg_ret("fw", ret);
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int vbe_abrec_read_file(struct udevice *dev, struct bootflow *bflow,
+			       const char *file_path, ulong addr,
+			       enum bootflow_img_t type, ulong *sizep)
+{
+	int ret;
+
+	if (vbe_phase() == VBE_PHASE_OS) {
+		ret = bootmeth_common_read_file(dev, bflow, file_path, addr,
+						type, sizep);
+		if (ret)
+			return log_msg_ret("os", ret);
+	}
+
+	/* To be implemented */
+	return -EINVAL;
+}
+
+static struct bootmeth_ops bootmeth_vbe_abrec_ops = {
+	.get_state_desc	= vbe_abrec_get_state_desc,
+	.read_bootflow	= vbe_abrec_read_bootflow,
+	.read_file	= vbe_abrec_read_file,
+};
+
+static int bootmeth_vbe_abrec_probe(struct udevice *dev)
+{
+	struct abrec_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = abrec_read_priv(dev_ofnode(dev), priv);
+	if (ret)
+		return log_msg_ret("abp", ret);
+
+	return 0;
+}
+
+static int bootmeth_vbe_abrec_bind(struct udevice *dev)
+{
+	struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
+
+	plat->desc = "VBE A/B/recovery";
+	plat->flags = BOOTMETHF_GLOBAL;
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_REAL)
+static const struct udevice_id generic_simple_vbe_abrec_ids[] = {
+	{ .compatible = "fwupd,vbe-abrec" },
+	{ }
+};
+#endif
+
+U_BOOT_DRIVER(vbe_abrec) = {
+	.name	= "vbe_abrec",
+	.id	= UCLASS_BOOTMETH,
+	.of_match = of_match_ptr(generic_simple_vbe_abrec_ids),
+	.ops	= &bootmeth_vbe_abrec_ops,
+	.bind	= bootmeth_vbe_abrec_bind,
+	.probe	= bootmeth_vbe_abrec_probe,
+	.flags	= DM_FLAG_PRE_RELOC,
+	.priv_auto	= sizeof(struct abrec_priv),
+};