cbi: add Second Source Factory Cache (SSFC) CBI field

SSFC field will be leveraged to record what second source is used in the
DUT by probing components in the factory or RMA.

Firmware code should refer to this field to judge what driver should be
configured for a specific component. For example, the board code can
arrange what sensor driver should be set into motion_sensors array if
there are multiple sources of base or lid sensor.

As the definition of FW_CONFIG, it describe which "features" the
firmware code should enable or disable. For example, whether lid / base
sensors should be enabled or not but not care about what second source
is in this DUT.

BRANCH=none
BUG=b:163285687
TEST=call `cbi-util` to create the cbi image with SSFC and show created
     content.
TEST=`make buildall -j`
TEST=`make runhosttests -j`

Change-Id: Icb4aa00ae47ab025198e7fd5edd6aab96a4bf53e
Signed-off-by: Marco Chen <marcochen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2344268
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Jett Rink <jettrink@chromium.org>
(cherry picked from commit 0212d4a3ce01452ddaba46f076f90e9a5e90e589)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3322221
Reviewed-by: Andrew McRae <amcrae@google.com>
Tested-by: Zick Wei <zick.wei@quanta.corp-partner.google.com>
Commit-Queue: Zick Wei <zick.wei@quanta.corp-partner.google.com>

6 files changed, 226 insertions, 2 deletions

diff --git a/common/cbi.c b/common/cbi.c
index 5263407441..64b78c817b 100644
--- a/common/cbi.c
+++ b/common/cbi.c
@@ -302,6 +302,14 @@ int cbi_get_fw_config(uint32_t *fw_config)
 				  &size);
 }
 
+int cbi_get_ssfc(uint32_t *ssfc)
+{
+	uint8_t size = sizeof(*ssfc);
+
+	return cbi_get_board_info(CBI_TAG_SSFC, (uint8_t *)ssfc,
+				  &size);
+}
+
 int cbi_get_pcb_supplier(uint32_t *pcb_supplier)
 {
 	uint8_t size = sizeof(*pcb_supplier);
@@ -426,6 +434,7 @@ static void dump_cbi(void)
 	print_tag("SKU_ID", cbi_get_sku_id(&val), &val);
 	print_tag("FW_CONFIG", cbi_get_fw_config(&val), &val);
 	print_tag("PCB_SUPPLIER", cbi_get_pcb_supplier(&val), &val);
+	print_tag("SSFC", cbi_get_ssfc(&val), &val);
 }
 
 static int cc_cbi(int argc, char **argv)
diff --git a/include/cros_board_info.h b/include/cros_board_info.h
index 25330779d5..35464d1020 100644
--- a/include/cros_board_info.h
+++ b/include/cros_board_info.h
@@ -44,7 +44,8 @@ struct cbi_data {
 /**
  * Board info accessors
  *
- * @param version/sku_id/oem_id/id/fw_config [OUT] Data read from EEPROM
+ * @param version/sku_id/oem_id/id/fw_config/pcb_supplier/ssfc [OUT] Data read
+ *        from EEPROM
  * @return EC_SUCCESS on success or EC_ERROR_* otherwise.
  *         EC_ERROR_BUSY to indicate data is not ready.
  */
@@ -54,6 +55,7 @@ int cbi_get_oem_id(uint32_t *oem_id);
 int cbi_get_model_id(uint32_t *id);
 int cbi_get_fw_config(uint32_t *fw_config);
 int cbi_get_pcb_supplier(uint32_t *pcb_supplier);
+int cbi_get_ssfc(uint32_t *ssfc);
 
 /**
  * Get data from CBI store
diff --git a/include/ec_commands.h b/include/ec_commands.h
index f07dbd7e68..1f1b5efc26 100644
--- a/include/ec_commands.h
+++ b/include/ec_commands.h
@@ -5762,6 +5762,8 @@ enum cbi_data_tag {
 	CBI_TAG_MODEL_ID = 5,      /* uint32_t or smaller */
 	CBI_TAG_FW_CONFIG = 6,     /* uint32_t bit field */
 	CBI_TAG_PCB_SUPPLIER = 7,  /* uint32_t or smaller */
+	/* Second Source Factory Cache */
+	CBI_TAG_SSFC = 8,          /* uint32_t bit field */
 	CBI_TAG_COUNT,
 };
 
diff --git a/test/cbi.c b/test/cbi.c
new file mode 100644
index 0000000000..936dc204b8
--- /dev/null
+++ b/test/cbi.c
@@ -0,0 +1,199 @@
+/* Copyright 2020 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Test CBI
+ */
+
+#include "common.h"
+#include "console.h"
+#include "cros_board_info.h"
+#include "gpio.h"
+#include "i2c.h"
+#include "test_util.h"
+#include "util.h"
+
+void before_test(void)
+{
+	cbi_create();
+	cbi_write();
+}
+
+static int test_uint8(void)
+{
+	uint8_t d8;
+	uint32_t d32;
+	uint8_t size;
+	const int tag = 0xff;
+
+	/* Set & get uint8_t */
+	d8 = 0xa5;
+	TEST_ASSERT(cbi_set_board_info(tag, &d8, sizeof(d8)) == EC_SUCCESS);
+	size = 1;
+	TEST_ASSERT(cbi_get_board_info(tag, &d8, &size) == EC_SUCCESS);
+	TEST_EQ(d8, 0xa5, "0x%x");
+	TEST_EQ(size, 1, "%x");
+
+	/* Size-up */
+	d32 = 0x1234abcd;
+	TEST_ASSERT(cbi_set_board_info(tag, (void *)&d32, sizeof(d32))
+		    == EC_SUCCESS);
+	size = 4;
+	TEST_ASSERT(cbi_get_board_info(tag, (void *)&d32, &size) == EC_SUCCESS);
+	TEST_EQ(d32, 0x1234abcd, "0x%x");
+	TEST_EQ(size, 4, "%u");
+
+	return EC_SUCCESS;
+}
+
+static int test_uint32(void)
+{
+	uint8_t d8;
+	uint32_t d32;
+	uint8_t size;
+	const int tag = 0xff;
+
+	/* Set & get uint32_t */
+	d32 = 0x1234abcd;
+	TEST_ASSERT(cbi_set_board_info(tag, (void *)&d32, sizeof(d32))
+			== EC_SUCCESS);
+	size = 4;
+	TEST_ASSERT(cbi_get_board_info(tag, (void *)&d32, &size) == EC_SUCCESS);
+	TEST_EQ(d32, 0x1234abcd, "0x%x");
+	TEST_EQ(size, 4, "%u");
+
+	/* Size-down */
+	d8 = 0xa5;
+	TEST_ASSERT(cbi_set_board_info(tag, &d8, sizeof(d8)) == EC_SUCCESS);
+	size = 1;
+	TEST_ASSERT(cbi_get_board_info(tag, &d8, &size) == EC_SUCCESS);
+	TEST_EQ(d8, 0xa5, "0x%x");
+	TEST_EQ(size, 1, "%u");
+
+	return EC_SUCCESS;
+}
+
+static int test_string(void)
+{
+	const uint8_t string[] = "abcdefghijklmn";
+	uint8_t buf[32];
+	uint8_t size;
+	const int tag = 0xff;
+
+	/* Set & get string */
+	TEST_ASSERT(cbi_set_board_info(tag, string, sizeof(string))
+		    == EC_SUCCESS);
+	size = sizeof(buf);
+	TEST_ASSERT(cbi_get_board_info(tag, buf, &size) == EC_SUCCESS);
+	TEST_ASSERT(strncmp(buf, string, sizeof(string)) == 0);
+	/* Size contains null byte */
+	TEST_EQ((size_t)size - 1, strlen(buf), "%zu");
+
+	/* Read buffer too small */
+	size = 4;
+	TEST_ASSERT(cbi_get_board_info(tag, buf, &size) == EC_ERROR_INVAL);
+
+	return EC_SUCCESS;
+}
+
+static int test_not_found(void)
+{
+	uint8_t d8;
+	const int tag = 0xff;
+	uint8_t size;
+
+	size = 1;
+	TEST_ASSERT(cbi_get_board_info(tag, &d8, &size) == EC_ERROR_UNKNOWN);
+
+	return EC_SUCCESS;
+}
+
+static int test_too_large(void)
+{
+	uint8_t buf[CBI_EEPROM_SIZE-1];
+	const int tag = 0xff;
+
+	/* Data too large */
+	memset(buf, 0xa5, sizeof(buf));
+	TEST_ASSERT(cbi_set_board_info(tag, buf, sizeof(buf))
+		    == EC_ERROR_OVERFLOW);
+
+	return EC_SUCCESS;
+}
+
+static int test_all_tags(void)
+{
+	uint8_t d8;
+	uint32_t d32;
+
+	/* Populate all data and read out */
+	d8 = 0x12;
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_BOARD_VERSION, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_OEM_ID, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_SKU_ID, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_MODEL_ID, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_FW_CONFIG, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_PCB_SUPPLIER, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_set_board_info(CBI_TAG_SSFC, &d8, sizeof(d8))
+		    == EC_SUCCESS);
+	TEST_ASSERT(cbi_get_board_version(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_oem_id(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_sku_id(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_model_id(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_fw_config(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_pcb_supplier(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+	TEST_ASSERT(cbi_get_ssfc(&d32) == EC_SUCCESS);
+	TEST_EQ(d32, d8, "0x%x");
+
+	/* Write protect */
+	gpio_set_level(GPIO_WP, 1);
+	TEST_ASSERT(cbi_write() == EC_ERROR_ACCESS_DENIED);
+
+	return EC_SUCCESS;
+}
+
+static int test_bad_crc(void)
+{
+	uint8_t d8;
+	const int tag = 0xff;
+	uint8_t size;
+	int crc;
+
+	/* Bad CRC */
+	d8 = 0xa5;
+	TEST_ASSERT(cbi_set_board_info(tag, &d8, sizeof(d8)) == EC_SUCCESS);
+	i2c_read8(I2C_PORT_EEPROM, I2C_ADDR_EEPROM_FLAGS,
+		   offsetof(struct cbi_header, crc), &crc);
+	i2c_write8(I2C_PORT_EEPROM, I2C_ADDR_EEPROM_FLAGS,
+		   offsetof(struct cbi_header, crc), ++crc);
+	cbi_invalidate_cache();
+	size = sizeof(d8);
+	TEST_ASSERT(cbi_get_board_info(tag, &d8, &size) == EC_ERROR_UNKNOWN);
+
+	return EC_SUCCESS;
+}
+
+void run_test(int argc, char **argv)
+{
+	RUN_TEST(test_uint8);
+	RUN_TEST(test_uint32);
+	RUN_TEST(test_string);
+	RUN_TEST(test_not_found);
+	RUN_TEST(test_too_large);
+	RUN_TEST(test_all_tags);
+	RUN_TEST(test_bad_crc);
+
+	test_print_result();
+}
diff --git a/util/cbi-util.c b/util/cbi-util.c
index 06dc909c20..3626b52859 100644
--- a/util/cbi-util.c
+++ b/util/cbi-util.c
@@ -39,6 +39,7 @@ enum {
 	OPT_MODEL_ID,
 	OPT_FW_CONFIG,
 	OPT_PCB_SUPPLIER,
+	OPT_SSFC,
 	OPT_SIZE,
 	OPT_ERASE_BYTE,
 	OPT_SHOW_ALL,
@@ -55,6 +56,7 @@ static const struct option opts_create[] = {
 	{"model_id", 1, 0, OPT_MODEL_ID},
 	{"fw_config", 1, 0, OPT_FW_CONFIG},
 	{"pcb_supplier", 1, 0, OPT_PCB_SUPPLIER},
+	{"ssfc", 1, 0, OPT_SSFC},
 	{"size", 1, 0, OPT_SIZE},
 	{"erase_byte", 1, 0, OPT_ERASE_BYTE},
 	{NULL, 0, 0, 0}
@@ -76,6 +78,7 @@ static const char *field_name[] = {
 	"MODEL_ID",
 	"FW_CONFIG",
 	"PCB_SUPPLIER",
+	"SSFC",
 };
 BUILD_ASSERT(ARRAY_SIZE(field_name) == CBI_TAG_COUNT);
 
@@ -97,6 +100,7 @@ const char help_create[] =
 	"  --model_id <value>         Model ID\n"
 	"  --fw_config <value>        Firmware configuration bit-field\n"
 	"  --pcb_supplier <value>     PCB supplier\n"
+	"  --ssfc <value>             Second Source Factory Cache bit-field\n"
 	"\n"
 	"<value> must be a positive integer <= 0XFFFFFFFF and field size can\n"
 	"    be optionally specified by <value:size> notation: e.g. 0xabcd:4.\n"
@@ -256,6 +260,7 @@ static int cmd_create(int argc, char **argv)
 		struct integer_field model;
 		struct integer_field fw_config;
 		struct integer_field pcb_supplier;
+		struct integer_field ssfc;
 		const char *dram_part_num;
 		const char *oem_name;
 	} bi;
@@ -332,6 +337,10 @@ static int cmd_create(int argc, char **argv)
 			if (parse_integer_field(optarg, &bi.pcb_supplier))
 				return -1;
 			break;
+		case OPT_SSFC:
+			if (parse_integer_field(optarg, &bi.ssfc))
+				return -1;
+			break;
 		}
 	}
 
@@ -362,6 +371,7 @@ static int cmd_create(int argc, char **argv)
 			 bi.fw_config.size);
 	p = cbi_set_data(p, CBI_TAG_PCB_SUPPLIER, &bi.pcb_supplier.val,
 			bi.pcb_supplier.size);
+	p = cbi_set_data(p, CBI_TAG_SSFC, &bi.ssfc.val, bi.ssfc.size);
 	p = cbi_set_string(p, CBI_TAG_DRAM_PART_NUM, bi.dram_part_num);
 	p = cbi_set_string(p, CBI_TAG_OEM_NAME, bi.oem_name);
 
@@ -488,9 +498,10 @@ static int cmd_show(int argc, char **argv)
 	print_integer(buf, CBI_TAG_SKU_ID);
 	print_integer(buf, CBI_TAG_MODEL_ID);
 	print_integer(buf, CBI_TAG_FW_CONFIG);
+	print_integer(buf, CBI_TAG_PCB_SUPPLIER);
+	print_integer(buf, CBI_TAG_SSFC);
 	print_string(buf, CBI_TAG_DRAM_PART_NUM);
 	print_string(buf, CBI_TAG_OEM_NAME);
-	print_integer(buf, CBI_TAG_PCB_SUPPLIER);
 
 	free(buf);
 
diff --git a/util/ectool.c b/util/ectool.c
index b76dc3aecd..fb18d55dab 100755
--- a/util/ectool.c
+++ b/util/ectool.c
@@ -7848,6 +7848,7 @@ static void cmd_cbi_help(char *cmd)
 	"      5: MODEL_ID\n"
 	"      6: FW_CONFIG\n"
 	"      7: PCB_VENDOR\n"
+	"      8: SSFC\n"
 	"    <size> is the size of the data in byte. It should be zero for\n"
 	"      string types.\n"
 	"    <value/string> is an integer or a string to be set\n"