inteltool: Add option to show differences in GPIO setup

This adds an option -G, --gpio-diffs to inteltool, which shows GPIO settings
that differ from platform defaults. For differing registers, the current,
the default, and an xor of the default and the current value is printed. A
follow-up commit will add defaults for the Cougar/Panther Point platform
controller hubs. If you specify both, -g and -G on the command line, all
GPIO registers will be printed interleaved with the diff.

Here's a preview:

$ ./inteltool -G
CPU: Processor Type: 0, Family 6, Model 3a, Stepping 9
Northbridge: 8086:0150 (unknown)
Southbridge: 8086:1e4a (H77)

========== GPIO DIFFS ===========

GPIOBASE = 0x0500 (IO)

gpiobase+0x0000: 0xb96ba1fb (GPIO_USE_SEL)
gpiobase+0x0000: 0xb96ba1ff (GPIO_USE_SEL) DEFAULT
gpiobase+0x0000: 0x00000004 (GPIO_USE_SEL) DIFF

gpiobase+0x0004: 0x06ff6efb (GP_IO_SEL)
gpiobase+0x0004: 0xeeff6eff (GP_IO_SEL) DEFAULT
gpiobase+0x0004: 0xe8000004 (GP_IO_SEL) DIFF

gpiobase+0x000c: 0xe1f17f7e (GP_LVL)
gpiobase+0x000c: 0x02fe0100 (GP_LVL) DEFAULT
gpiobase+0x000c: 0xe30f7e7e (GP_LVL) DIFF

gpiobase+0x002c: 0x00002000 (GPI_INV)
gpiobase+0x002c: 0x00000000 (GPI_INV) DEFAULT
gpiobase+0x002c: 0x00002000 (GPI_INV) DIFF

gpiobase+0x0030: 0x0aff70ff (GPIO_USE_SEL2)
gpiobase+0x0030: 0x020300ff (GPIO_USE_SEL2) DEFAULT
gpiobase+0x0030: 0x08fc7000 (GPIO_USE_SEL2) DIFF

gpiobase+0x0034: 0x15038ff2 (GP_IO_SEL2)
gpiobase+0x0034: 0x1f57fff4 (GP_IO_SEL2) DEFAULT
gpiobase+0x0034: 0x0a547006 (GP_IO_SEL2) DIFF

gpiobase+0x0038: 0xb65e7f4f (GP_LVL2)
gpiobase+0x0038: 0xa4aa0007 (GP_LVL2) DEFAULT
gpiobase+0x0038: 0x12f47f48 (GP_LVL2) DIFF

gpiobase+0x0040: 0x000001f3 (GPIO_USE_SEL3)
gpiobase+0x0040: 0x00000130 (GPIO_USE_SEL3) DEFAULT
gpiobase+0x0040: 0x000000c3 (GPIO_USE_SEL3) DIFF

gpiobase+0x0044: 0x00000ef3 (GPIO_SEL3)
gpiobase+0x0044: 0x00000ff0 (GPIO_SEL3) DEFAULT
gpiobase+0x0044: 0x00000103 (GPIO_SEL3) DIFF

gpiobase+0x0048: 0x00000dfc (GPIO_LVL3)
gpiobase+0x0048: 0x000000c0 (GPIO_LVL3) DEFAULT
gpiobase+0x0048: 0x00000d3c (GPIO_LVL3) DIFF

gpiobase+0x0060: 0x00000000 (GP_RST_SEL1)
gpiobase+0x0060: 0x01000000 (GP_RST_SEL1) DEFAULT
gpiobase+0x0060: 0x01000000 (GP_RST_SEL1) DIFF

$ ./inteltool -gG
CPU: Processor Type: 0, Family 6, Model 3a, Stepping 9
Northbridge: 8086:0150 (unknown)
Southbridge: 8086:1e4a (H77)

============= GPIOS =============

GPIOBASE = 0x0500 (IO)

gpiobase+0x0000: 0xb96ba1fb (GPIO_USE_SEL)
gpiobase+0x0000: 0xb96ba1ff (GPIO_USE_SEL) DEFAULT
gpiobase+0x0000: 0x00000004 (GPIO_USE_SEL) DIFF
gpiobase+0x0004: 0x06ff6efb (GP_IO_SEL)
gpiobase+0x0004: 0xeeff6eff (GP_IO_SEL) DEFAULT
gpiobase+0x0004: 0xe8000004 (GP_IO_SEL) DIFF
gpiobase+0x0008: 0x00000000 (RESERVED)
gpiobase+0x000c: 0xe1f17f7e (GP_LVL)
gpiobase+0x000c: 0x02fe0100 (GP_LVL) DEFAULT
gpiobase+0x000c: 0xe30f7e7e (GP_LVL) DIFF
gpiobase+0x0010: 0x00000000 (RESERVED)
gpiobase+0x0014: 0x00000000 (RESERVED)
gpiobase+0x0018: 0x00040000 (GPO_BLINK)
gpiobase+0x001c: 0x00000000 (GP_SER_BLINK)
gpiobase+0x0020: 0x00080000 (GP_SB_CMDSTS)
gpiobase+0x0024: 0x00000000 (GP_SB_DATA)
gpiobase+0x0028: 0x0000     (GPI_NMI_EN)
gpiobase+0x002a: 0x0000     (GPI_NMI_STS)
gpiobase+0x002c: 0x00002000 (GPI_INV)
gpiobase+0x002c: 0x00000000 (GPI_INV) DEFAULT
gpiobase+0x002c: 0x00002000 (GPI_INV) DIFF
gpiobase+0x0030: 0x0aff70ff (GPIO_USE_SEL2)
gpiobase+0x0030: 0x020300ff (GPIO_USE_SEL2) DEFAULT
gpiobase+0x0030: 0x08fc7000 (GPIO_USE_SEL2) DIFF
gpiobase+0x0034: 0x15038ff2 (GP_IO_SEL2)
gpiobase+0x0034: 0x1f57fff4 (GP_IO_SEL2) DEFAULT
gpiobase+0x0034: 0x0a547006 (GP_IO_SEL2) DIFF
gpiobase+0x0038: 0xb65e7f4f (GP_LVL2)
gpiobase+0x0038: 0xa4aa0007 (GP_LVL2) DEFAULT
gpiobase+0x0038: 0x12f47f48 (GP_LVL2) DIFF
gpiobase+0x003c: 0x00000000 (RESERVED)
gpiobase+0x0040: 0x000001f3 (GPIO_USE_SEL3)
gpiobase+0x0040: 0x00000130 (GPIO_USE_SEL3) DEFAULT
gpiobase+0x0040: 0x000000c3 (GPIO_USE_SEL3) DIFF
gpiobase+0x0044: 0x00000ef3 (GPIO_SEL3)
gpiobase+0x0044: 0x00000ff0 (GPIO_SEL3) DEFAULT
gpiobase+0x0044: 0x00000103 (GPIO_SEL3) DIFF
gpiobase+0x0048: 0x00000dfc (GPIO_LVL3)
gpiobase+0x0048: 0x000000c0 (GPIO_LVL3) DEFAULT
gpiobase+0x0048: 0x00000d3c (GPIO_LVL3) DIFF
gpiobase+0x004c: 0x00000000 (RESERVED)
gpiobase+0x0050: 0x00000000 (RESERVED)
gpiobase+0x0054: 0x00000000 (RESERVED)
gpiobase+0x0058: 0x00000000 (RESERVED)
gpiobase+0x005c: 0x00000000 (RESERVED)
gpiobase+0x0060: 0x00000000 (GP_RST_SEL1)
gpiobase+0x0060: 0x01000000 (GP_RST_SEL1) DEFAULT
gpiobase+0x0060: 0x01000000 (GP_RST_SEL1) DIFF
gpiobase+0x0064: 0x00000000 (GP_RST_SEL2)
gpiobase+0x0068: 0x00000000 (GP_RST_SEL3)
gpiobase+0x006c: 0x00000000 (RESERVED)
gpiobase+0x0070: 0x00000000 (RESERVED)
gpiobase+0x0074: 0x00000000 (RESERVED)
gpiobase+0x0078: 0x00000000 (RESERVED)
gpiobase+0x007c: 0x00000000 (RESERVED)

Change-Id: Ic77474c4bc0871e95103ddecd9f6a9406c8f016d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: http://review.coreboot.org/3000
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 13 insertions, 3 deletions

diff --git a/util/inteltool/inteltool.c b/util/inteltool/inteltool.c
index d56d0580fa..2396eb04a2 100644
--- a/util/inteltool/inteltool.c
+++ b/util/inteltool/inteltool.c
@@ -197,11 +197,12 @@ void print_version(void)
 
 void print_usage(const char *name)
 {
-	printf("usage: %s [-vh?grpmedPMa]\n", name);
+	printf("usage: %s [-vh?gGrpmedPMa]\n", name);
 	printf("\n"
 	     "   -v | --version:                   print the version\n"
 	     "   -h | --help:                      print this help\n\n"
 	     "   -g | --gpio:                      dump soutbridge GPIO registers\n"
+	     "   -G | --gpio-diffs:                show GPIO differences from defaults\n"
 	     "   -r | --rcba:                      dump soutbridge RCBA registers\n"
 	     "   -p | --pmbase:                    dump soutbridge Power Management registers\n\n"
 	     "   -m | --mchbar:                    dump northbridge Memory Controller registers\n"
@@ -227,11 +228,13 @@ int main(int argc, char *argv[])
 	int dump_gpios = 0, dump_mchbar = 0, dump_rcba = 0;
 	int dump_pmbase = 0, dump_epbar = 0, dump_dmibar = 0;
 	int dump_pciexbar = 0, dump_coremsrs = 0, dump_ambs = 0;
+	int show_gpio_diffs = 0;
 
 	static struct option long_options[] = {
 		{"version", 0, 0, 'v'},
 		{"help", 0, 0, 'h'},
 		{"gpios", 0, 0, 'g'},
+		{"gpio-diffs", 0, 0, 'G'},
 		{"mchbar", 0, 0, 'm'},
 		{"rcba", 0, 0, 'r'},
 		{"pmbase", 0, 0, 'p'},
@@ -244,7 +247,7 @@ int main(int argc, char *argv[])
 		{0, 0, 0, 0}
 	};
 
-	while ((opt = getopt_long(argc, argv, "vh?grpmedPMaA",
+	while ((opt = getopt_long(argc, argv, "vh?gGrpmedPMaA",
                                   long_options, &option_index)) != EOF) {
 		switch (opt) {
 		case 'v':
@@ -254,6 +257,9 @@ int main(int argc, char *argv[])
 		case 'g':
 			dump_gpios = 1;
 			break;
+		case 'G':
+			show_gpio_diffs = 1;
+			break;
 		case 'm':
 			dump_mchbar = 1;
 			break;
@@ -277,6 +283,7 @@ int main(int argc, char *argv[])
 			break;
 		case 'a':
 			dump_gpios = 1;
+			show_gpio_diffs = 1;
 			dump_mchbar = 1;
 			dump_rcba = 1;
 			dump_pmbase = 1;
@@ -393,7 +400,10 @@ int main(int argc, char *argv[])
 	/* Now do the deed */
 
 	if (dump_gpios) {
-		print_gpios(sb);
+		print_gpios(sb, 1, show_gpio_diffs);
+		printf("\n\n");
+	} else if (show_gpio_diffs) {
+		print_gpios(sb, 0, show_gpio_diffs);
 		printf("\n\n");
 	}