From ab759f3138e5ea798e93003e6ce0ffe66ac2970f Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Thu, 10 Jan 2019 17:58:06 +0000
Subject: [PATCH] firmware: raspberrypi: Report the fw variant during
 probe

The driver already reported the firmware build date during probe.
The mailbox calls have been extended to also report the variant
 1 = standard start.elf
 2 = start_x.elf (includes camera stack)
 3 = start_db.elf (includes assert logging)
 4 = start_cd.elf (cutdown version for smallest memory footprint).
Log the variant during probe.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

firmware: raspberrypi: Report the fw git hash during probe

The firmware can now report the git hash from which it was built
via the mailbox, so report it during probe.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
 drivers/firmware/raspberrypi.c             | 40 +++++++++++++++++++++-
 include/soc/bcm2835/raspberrypi-firmware.h |  2 ++
 2 files changed, 41 insertions(+), 1 deletion(-)

--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -234,6 +234,15 @@ rpi_firmware_print_firmware_revision(str
 {
 	time64_t date_and_time;
 	u32 packet;
+	static const char * const variant_strs[] = {
+		"unknown",
+		"start",
+		"start_x",
+		"start_db",
+		"start_cd",
+	};
+	const char *variant_str = "cmd unsupported";
+	u32 variant;
 	int ret = rpi_firmware_property(fw,
 					RPI_FIRMWARE_GET_FIRMWARE_REVISION,
 					&packet, sizeof(packet));
@@ -243,7 +252,35 @@ rpi_firmware_print_firmware_revision(str
 
 	/* This is not compatible with y2038 */
 	date_and_time = packet;
-	dev_info(fw->cl.dev, "Attached to firmware from %ptT\n", &date_and_time);
+
+	ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_FIRMWARE_VARIANT,
+				    &variant, sizeof(variant));
+
+	if (!ret) {
+		if (variant >= ARRAY_SIZE(variant_strs))
+			variant = 0;
+		variant_str = variant_strs[variant];
+	}
+
+	dev_info(fw->cl.dev,
+		 "Attached to firmware from %ptT, variant %s\n",
+		 &date_and_time, variant_str);
+}
+
+static void
+rpi_firmware_print_firmware_hash(struct rpi_firmware *fw)
+{
+	u32 hash[5];
+	int ret = rpi_firmware_property(fw,
+					RPI_FIRMWARE_GET_FIRMWARE_HASH,
+					hash, sizeof(hash));
+
+	if (ret)
+		return;
+
+	dev_info(fw->cl.dev,
+		 "Firmware hash is %08x%08x%08x%08x%08x\n",
+		 hash[0], hash[1], hash[2], hash[3], hash[4]);
 }
 
 static void
@@ -332,6 +369,7 @@ static int rpi_firmware_probe(struct pla
 	g_pdev = pdev;
 
 	rpi_firmware_print_firmware_revision(fw);
+	rpi_firmware_print_firmware_hash(fw);
 	rpi_register_hwmon_driver(dev, fw);
 	rpi_register_clk_driver(dev);
 
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -38,6 +38,8 @@ struct rpi_firmware_property_tag_header
 enum rpi_firmware_property_tag {
 	RPI_FIRMWARE_PROPERTY_END =                           0,
 	RPI_FIRMWARE_GET_FIRMWARE_REVISION =                  0x00000001,
+	RPI_FIRMWARE_GET_FIRMWARE_VARIANT =                   0x00000002,
+	RPI_FIRMWARE_GET_FIRMWARE_HASH =                      0x00000003,
 
 	RPI_FIRMWARE_SET_CURSOR_INFO =                        0x00008010,
 	RPI_FIRMWARE_SET_CURSOR_STATE =                       0x00008011,
