ec: Add Inventory command

Add command that list supported features by the firmware.
Also let the firmware indicates if more features are expected in the RW
version.

This will help the cros_ec framework load the right driver(s) for
exposing information via sysfs.

BUG=chromium:428364
BRANCH=none
TEST=Test on samus on both ec and pd:
localhost ~ # ectool inventory
EC supported features:
1   : Flash support
2   : Direct Fan power management support
3   : Keyboard backlight support
4   : Lightbar support
6   : Motion Sensors support
7   : Keyboard support
9   : BIOS Port 80h access support
10  : Thermal management support
11  : Switch backlight on/off support
12  : Switch wifi on/off support
13  : Host event support
14  : GPIO support
15  : I2C master support
16  : Charger support
17  : Simple Battery support
18  : Smart Battery support
21  : Control downstream MCU support
localhost ~ # ectool --name cros_pd inventory
EC supported features:
1   : Flash support
14  : GPIO support
15  : I2C master support
22  : USB Cros Power Delievery support

Change-Id: Ib6eaac91fda86835e754c5316ecf81fbc27786e5
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/263463
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Sameer Nanda <snanda@chromium.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/util/ectool.c b/util/ectool.c
index c809464d92..9470600029 100644
--- a/util/ectool.c
+++ b/util/ectool.c
@@ -127,6 +127,8 @@ const char help_str[] =
 	"      Perform I2C transfer on EC's I2C bus\n"
 	"  infopddev <port>\n"
 	"      Get info about USB type-C accessory attached to port\n"
+	"  inventory\n"
+	"      Return the list of supported features\n"
 	"  keyscan <beat_us> <filename>\n"
 	"      Test low-level key scanning\n"
 	"  led <name> <query | auto | off | <color> | <color>=<value>...>\n"
@@ -392,6 +394,58 @@ int cmd_s5(int argc, char *argv[])
 	return rv < 0;
 }
 
+static const char * const ec_feature_names[] = {
+	[EC_FEATURE_LIMITED] = "Limited image, load RW for more",
+	[EC_FEATURE_FLASH] = "Flash",
+	[EC_FEATURE_PWM_FAN] = "Direct Fan power management",
+	[EC_FEATURE_PWM_KEYB] = "Keyboard backlight",
+	[EC_FEATURE_LIGHTBAR] = "Lightbar",
+	[EC_FEATURE_LED] = "LED",
+	[EC_FEATURE_MOTION_SENSE] = "Motion Sensors",
+	[EC_FEATURE_KEYB] = "Keyboard",
+	[EC_FEATURE_PSTORE] = "Host Permanent Storage",
+	[EC_FEATURE_PORT80] = "BIOS Port 80h access",
+	[EC_FEATURE_THERMAL] = "Thermal management",
+	[EC_FEATURE_BKLIGHT_SWITCH] = "Switch backlight on/off",
+	[EC_FEATURE_WIFI_SWITCH] = "Switch wifi on/off",
+	[EC_FEATURE_HOST_EVENTS] = "Host event",
+	[EC_FEATURE_GPIO] = "GPIO",
+	[EC_FEATURE_I2C] = "I2C master",
+	[EC_FEATURE_CHARGER] = "Charger",
+	[EC_FEATURE_BATTERY] = "Simple Battery",
+	[EC_FEATURE_SMART_BATTERY] = "Smart Battery",
+	[EC_FEATURE_HANG_DETECT] = "Host hang detection",
+	[EC_FEATURE_PMU] = "Power Management",
+	[EC_FEATURE_SUB_MCU] = "Control downstream MCU",
+	[EC_FEATURE_USB_PD] = "USB Cros Power Delievery",
+	[EC_FEATURE_USB_MUX] = "USB Multiplexer",
+};
+
+int cmd_inventory(int argc, char *argv[])
+{
+	struct ec_response_get_features r;
+	int rv, i, j, idx;
+
+	rv = ec_command(EC_CMD_GET_FEATURES, 0, NULL, 0, &r, sizeof(r));
+	if (rv < 0)
+		return rv;
+
+	printf("EC supported features:\n");
+	for (i = 0, idx = 0; i < 2; i++) {
+		for (j = 0; j < 32; j++, idx++) {
+			if (r.flags[i] & (1 << j)) {
+				if (idx >= ARRAY_SIZE(ec_feature_names) ||
+				    strlen(ec_feature_names[idx]) == 0)
+					printf("%-4d: Unknown feature\n", idx);
+				else
+					printf("%-4d: %s support\n",
+					       idx, ec_feature_names[idx]);
+			}
+		}
+	}
+	return 0;
+}
+
 
 int cmd_cmdversions(int argc, char *argv[])
 {
@@ -6155,6 +6209,7 @@ const struct command commands[] = {
 	{"i2cwrite", cmd_i2c_write},
 	{"i2cxfer", cmd_i2c_xfer},
 	{"infopddev", cmd_pd_device_info},
+	{"inventory", cmd_inventory},
 	{"led", cmd_led},
 	{"lightbar", cmd_lightbar},
 	{"keyconfig", cmd_keyconfig},