Add a little program to output the stepping information for several chipsets.

src/reg_dumper/.gitignore

@@ -1 +1,3 @@
+intel_idle
 intel_reg_dumper
+intel_stepping

src/reg_dumper/Makefile.am

@@ -1,4 +1,4 @@
-noinst_PROGRAMS = intel_reg_dumper intel_idle
+noinst_PROGRAMS = intel_reg_dumper intel_idle intel_stepping
 
 intel_reg_dumper_SOURCES = \
 	main.c \
@@ -12,9 +12,12 @@ intel_idle_SOURCES = \
 	xprintf.c \
 	../i830_debug.c
 
-intel_reg_dumper_LDADD = $(PCIACCESS_LIBS)
+intel_stepping_SOURCES = \
+	stepping.c
 
+intel_reg_dumper_LDADD = $(PCIACCESS_LIBS)
 intel_idle_LDADD = $(PCIACCESS_LIBS)
+intel_stepping_LDADD = $(PCIACCESS_LIBS)
 
 AM_CFLAGS = $(PCIACCESS_CFLAGS) $(WARN_CFLAGS) \
 	-I$(srcdir)/.. -DREG_DUMPER

src/reg_dumper/stepping.c

@@ -0,0 +1,137 @@
+/*
+ * Copyright © 2007 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <pciaccess.h>
+#include <err.h>
+#include "common.h"
+
+int main(int argc, char **argv)
+{
+    struct pci_device *dev, *bridge;
+    int err;
+    uint8_t stepping;
+    char *step_desc = "??";
+
+    err = pci_system_init();
+    if (err != 0) {
+	fprintf(stderr, "Couldn't initialize PCI system: %s\n", strerror(err));
+	exit(1);
+    }
+
+    /* Grab the graphics card */
+    dev = pci_device_find_by_slot(0, 0, 2, 0);
+    if (dev == NULL)
+	errx(1, "Couldn't find graphics card");
+
+    err = pci_device_probe(dev);
+    if (err != 0) {
+	fprintf(stderr, "Couldn't probe graphics card: %s\n", strerror(err));
+	exit(1);
+    }
+
+    if (dev->vendor_id != 0x8086)
+	errx(1, "Graphics card is non-intel");
+
+    bridge = pci_device_find_by_slot(0, 0, 0, 0);
+    if (dev == NULL)
+	errx(1, "Couldn't bridge");
+
+    err = pci_device_cfg_read_u8(bridge, &stepping, 8);
+    if (err != 0) {
+	fprintf(stderr, "Couldn't read revision ID: %s\n", strerror(err));
+	exit(1);
+    }
+
+    switch (dev->device_id) {
+    case PCI_CHIP_I915_G:
+	if (stepping < 0x04)
+	    step_desc = "<B1";
+	else if (stepping == 0x04)
+	    step_desc = "B1";
+	else if (stepping == 0x0e)
+	    step_desc = "C2";
+	else if (stepping > 0x0e)
+	    step_desc = ">C2";
+	else
+	    step_desc = ">B1 <C2";
+	break;
+    case PCI_CHIP_I915_GM:
+	if (stepping < 0x03)
+	    step_desc = "<B1";
+	else if (stepping == 0x03)
+	    step_desc = "B1/C0";
+	else if (stepping == 0x04)
+	    step_desc = "C1/C2";
+	else
+	    step_desc = ">C2";
+	break;
+    case PCI_CHIP_I945_GM:
+	if (stepping < 0x03)
+	    step_desc = "<A3";
+	else if (stepping == 0x03)
+	    step_desc = "A3";
+	else
+	    step_desc = ">A3";
+	break;
+    case PCI_CHIP_I965_G:
+    case PCI_CHIP_I965_Q:
+	if (stepping < 0x02)
+	    step_desc = "<C1";
+	else if (stepping == 0x02)
+	    step_desc = "C1/C2";
+	else
+	    step_desc = ">C2";
+	break;
+    case PCI_CHIP_I965_GM:
+	if (stepping < 0x03)
+	    step_desc = "<C0";
+	else if (stepping == 0x03)
+	    step_desc = "C0";
+	else
+	    step_desc = ">C0";
+	break;
+    case PCI_CHIP_G35_G:
+	if (stepping < 0x03)
+	    step_desc = "<E0";
+	else if (stepping == 0x03)
+	    step_desc = "E0";
+	else
+	    step_desc = ">E0";
+	break;
+    }
+
+    printf("Vendor: 0x%04x, Device: 0x%04x, Revision: 0x%02x (%s)\n",
+	   dev->vendor_id,
+	   dev->device_id,
+	   stepping,
+	   step_desc);
+    return 0;
+}