X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=common%2Fcmd_tpm.c;h=add6bfb416e0ca7966652775acd684e50ac3e750;hb=19de81502be9e4dd1132b4b9641f66a587b8b0e2;hp=0294952e69a73849293d43a9974d1d2a1bbdecfc;hpb=326ea986ac150acdc7656d57fca647db80b50158;p=oweals%2Fu-boot.git

diff --git a/common/cmd_tpm.c b/common/cmd_tpm.c
index 0294952e69..add6bfb416 100644
--- a/common/cmd_tpm.c
+++ b/common/cmd_tpm.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <dm.h>
 #include <malloc.h>
 #include <tpm.h>
 #include <asm/unaligned.h>
@@ -57,6 +58,8 @@ static void *parse_byte_string(char *bytes, uint8_t *data, size_t *count_ptr)
 	size_t count, length;
 	int i;
 
+	if (!bytes)
+		return NULL;
 	length = strlen(bytes);
 	count = length / 2;
 
@@ -79,17 +82,19 @@ static void *parse_byte_string(char *bytes, uint8_t *data, size_t *count_ptr)
 }
 
 /**
- * Convert TPM command return code to U-Boot command error codes.
+ * report_return_code() - Report any error and return failure or success
  *
  * @param return_code	TPM command return code
  * @return value of enum command_ret_t
  */
-static int convert_return_code(uint32_t return_code)
+static int report_return_code(int return_code)
 {
-	if (return_code)
+	if (return_code) {
+		printf("Error: %d\n", return_code);
 		return CMD_RET_FAILURE;
-	else
+	} else {
 		return CMD_RET_SUCCESS;
+	}
 }
 
 /**
@@ -251,7 +256,7 @@ static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag,
 		return CMD_RET_FAILURE;
 	}
 
-	return convert_return_code(tpm_startup(mode));
+	return report_return_code(tpm_startup(mode));
 }
 
 static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
@@ -265,7 +270,7 @@ static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
 	perm = simple_strtoul(argv[2], NULL, 0);
 	size = simple_strtoul(argv[3], NULL, 0);
 
-	return convert_return_code(tpm_nv_define_space(index, perm, size));
+	return report_return_code(tpm_nv_define_space(index, perm, size));
 }
 
 static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
@@ -286,7 +291,7 @@ static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
 		print_byte_string(data, count);
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
@@ -308,7 +313,7 @@ static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
 	rc = tpm_nv_write_value(index, data, count);
 	free(data);
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
@@ -331,7 +336,7 @@ static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
 		print_byte_string(out_digest, sizeof(out_digest));
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
@@ -352,7 +357,7 @@ static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
 		print_byte_string(data, count);
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
@@ -364,7 +369,7 @@ static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
 		return CMD_RET_USAGE;
 	presence = (uint16_t)simple_strtoul(argv[1], NULL, 0);
 
-	return convert_return_code(tpm_tsc_physical_presence(presence));
+	return report_return_code(tpm_tsc_physical_presence(presence));
 }
 
 static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
@@ -384,7 +389,7 @@ static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
 		print_byte_string(data, count);
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
@@ -396,7 +401,7 @@ static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
 		return CMD_RET_USAGE;
 	state = (uint8_t)simple_strtoul(argv[1], NULL, 0);
 
-	return convert_return_code(tpm_physical_set_deactivated(state));
+	return report_return_code(tpm_physical_set_deactivated(state));
 }
 
 static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
@@ -419,7 +424,7 @@ static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
 		print_byte_string(cap, count);
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 #define TPM_COMMAND_NO_ARG(cmd)				\
@@ -428,7 +433,7 @@ static int do_##cmd(cmd_tbl_t *cmdtp, int flag,		\
 {							\
 	if (argc != 1)					\
 		return CMD_RET_USAGE;			\
-	return convert_return_code(cmd());		\
+	return report_return_code(cmd());		\
 }
 
 TPM_COMMAND_NO_ARG(tpm_init)
@@ -438,9 +443,43 @@ TPM_COMMAND_NO_ARG(tpm_force_clear)
 TPM_COMMAND_NO_ARG(tpm_physical_enable)
 TPM_COMMAND_NO_ARG(tpm_physical_disable)
 
+static int get_tpm(struct udevice **devp)
+{
+	int rc;
+
+	rc = uclass_first_device(UCLASS_TPM, devp);
+	if (rc) {
+		printf("Could not find TPM (ret=%d)\n", rc);
+		return CMD_RET_FAILURE;
+	}
+
+	return 0;
+}
+
+static int do_tpm_info(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char *const argv[])
+{
+	struct udevice *dev;
+	char buf[80];
+	int rc;
+
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+	rc = tpm_get_desc(dev, buf, sizeof(buf));
+	if (rc < 0) {
+		printf("Couldn't get TPM info (%d)\n", rc);
+		return CMD_RET_FAILURE;
+	}
+	printf("%s\n", buf);
+
+	return 0;
+}
+
 static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
 		int argc, char * const argv[])
 {
+	struct udevice *dev;
 	void *command;
 	uint8_t response[1024];
 	size_t count, response_length = sizeof(response);
@@ -452,14 +491,18 @@ static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
 		return CMD_RET_FAILURE;
 	}
 
-	rc = tis_sendrecv(command, count, response, &response_length);
+	rc = get_tpm(&dev);
+	if (rc)
+		return rc;
+
+	rc = tpm_xfer(dev, command, count, response, &response_length);
 	free(command);
 	if (!rc) {
 		puts("tpm response:\n");
 		print_byte_string(response, response_length);
 	}
 
-	return convert_return_code(rc);
+	return report_return_code(rc);
 }
 
 static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
@@ -477,7 +520,7 @@ static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
 	index = simple_strtoul(argv[2], NULL, 0);
 	perm = simple_strtoul(argv[3], NULL, 0);
 
-	return convert_return_code(tpm_nv_define_space(index, perm, size));
+	return report_return_code(tpm_nv_define_space(index, perm, size));
 }
 
 static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
@@ -506,7 +549,7 @@ static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
 	}
 	free(data);
 
-	return convert_return_code(err);
+	return report_return_code(err);
 }
 
 static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
@@ -534,7 +577,7 @@ static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
 	err = tpm_nv_write_value(index, data, count);
 	free(data);
 
-	return convert_return_code(err);
+	return report_return_code(err);
 }
 
 #ifdef CONFIG_TPM_AUTH_SESSIONS
@@ -546,7 +589,7 @@ static int do_tpm_oiap(cmd_tbl_t *cmdtp, int flag,
 
 	err = tpm_oiap(&auth_handle);
 
-	return convert_return_code(err);
+	return report_return_code(err);
 }
 
 static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag,
@@ -571,7 +614,7 @@ static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag,
 	if (!err)
 		printf("Key handle is 0x%x\n", key_handle);
 
-	return convert_return_code(err);
+	return report_return_code(err);
 }
 
 static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag,
@@ -596,7 +639,7 @@ static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag,
 		printf("dump of received pub key structure:\n");
 		print_byte_string(pub_key_buffer, pub_key_len);
 	}
-	return convert_return_code(err);
+	return report_return_code(err);
 }
 
 TPM_COMMAND_NO_ARG(tpm_end_oiap)
@@ -607,6 +650,7 @@ TPM_COMMAND_NO_ARG(tpm_end_oiap)
 	U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "")
 
 static cmd_tbl_t tpm_commands[] = {
+	U_BOOT_CMD_MKENT(info, 0, 1, do_tpm_info, "", ""),
 	U_BOOT_CMD_MKENT(init, 0, 1,
 			do_tpm_init, "", ""),
 	U_BOOT_CMD_MKENT(startup, 0, 1,
@@ -677,6 +721,7 @@ U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm,
 "cmd args...\n"
 "    - Issue TPM command <cmd> with arguments <args...>.\n"
 "Admin Startup and State Commands:\n"
+"  info - Show information about the TPM\n"
 "  init\n"
 "    - Put TPM into a state where it waits for 'startup' command.\n"
 "  startup mode\n"