Add initial support for flashing some NVIDIA graphics cards

The new option is '-p gfxnvidia', rest of the interface is as usual.

I tested a successful identify and read on a "RIVA TNT2 Model 64/Model 64 Pro"
card for now, erase and write did NOT work properly so far!

Please do not attempt to write/erase cards yet, unless you can recover!

In addition to the NVIDIA handling code it was required to call
programmer_shutdown() in a lot more places, otherwise the graphics card
will be disabled in the init function, but never enabled again as the
shutdown function is not called.
The shutdown handling may be changed to use atexit() later.

Corresponding to flashrom svn r737.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Luc Verhaegen <libv@skynet.be>

flashrom.c

@@ -92,6 +92,25 @@ const struct programmer_entry programmer_table[] = {
 	},
 #endif
 
+#if GFXNVIDIA_SUPPORT == 1
+	{
+		.name			= "gfxnvidia",
+		.init			= gfxnvidia_init,
+		.shutdown		= gfxnvidia_shutdown,
+		.map_flash_region	= fallback_map,
+		.unmap_flash_region	= fallback_unmap,
+		.chip_readb		= gfxnvidia_chip_readb,
+		.chip_readw		= fallback_chip_readw,
+		.chip_readl		= fallback_chip_readl,
+		.chip_readn		= fallback_chip_readn,
+		.chip_writeb		= gfxnvidia_chip_writeb,
+		.chip_writew		= fallback_chip_writew,
+		.chip_writel		= fallback_chip_writel,
+		.chip_writen		= fallback_chip_writen,
+		.delay			= internal_delay,
+	},
+#endif
+
 #if DRKAISER_SUPPORT == 1
 	{
 		.name			= "drkaiser",
@@ -824,6 +843,9 @@ int main(int argc, char *argv[])
 #if NIC3COM_SUPPORT == 1
 		print_supported_pcidevs(nics_3com);
 #endif
+#if GFXNVIDIA_SUPPORT == 1
+		print_supported_pcidevs(gfx_nvidia);
+#endif
 #if DRKAISER_SUPPORT == 1
 		print_supported_pcidevs(drkaiser_pcidev);
 #endif
@@ -868,6 +890,7 @@ int main(int argc, char *argv[])
 		for (i = 0; i < ARRAY_SIZE(flashes) && flashes[i]; i++)
 			printf(" %s", flashes[i]->name);
 		printf("\nPlease specify which chip to use with the -c <chipname> option.\n");
+		programmer_shutdown();
 		exit(1);
 	} else if (!flashes[0]) {
 		printf("No EEPROM/flash device found.\n");
@@ -890,6 +913,7 @@ int main(int argc, char *argv[])
 			return read_flash(flashes[0], filename);
 		}
 		// FIXME: flash writes stay enabled!
+		programmer_shutdown();
 		exit(1);
 	}
 
@@ -935,12 +959,14 @@ int main(int argc, char *argv[])
 	if (!(read_it | write_it | verify_it | erase_it)) {
 		printf("No operations were specified.\n");
 		// FIXME: flash writes stay enabled!
+		programmer_shutdown();
 		exit(1);
 	}
 
 	if (!filename && !erase_it) {
 		printf("Error: No filename specified.\n");
 		// FIXME: flash writes stay enabled!
+		programmer_shutdown();
 		exit(1);
 	}
 
@@ -956,6 +982,7 @@ int main(int argc, char *argv[])
 			fprintf(stderr, "Erase is not working on this chip. ");
 			if (!force) {
 				fprintf(stderr, "Aborting.\n");
+				programmer_shutdown();
 				return 1;
 			} else {
 				fprintf(stderr, "Continuing anyway.\n");
@@ -963,11 +990,14 @@ int main(int argc, char *argv[])
 		}
 		if (erase_flash(flash)) {
 			emergency_help_message();
+			programmer_shutdown();
 			return 1;
 		}
 	} else if (read_it) {
-		if (read_flash(flash, filename))
+		if (read_flash(flash, filename)) {
+			programmer_shutdown();
 			return 1;
+		}
 	} else {
 		struct stat image_stat;
 
@@ -976,6 +1006,7 @@ int main(int argc, char *argv[])
 				"and erase is needed for write. ");
 			if (!force) {
 				fprintf(stderr, "Aborting.\n");
+				programmer_shutdown();
 				return 1;
 			} else {
 				fprintf(stderr, "Continuing anyway.\n");
@@ -985,6 +1016,7 @@ int main(int argc, char *argv[])
 			fprintf(stderr, "Write is not working on this chip. ");
 			if (!force) {
 				fprintf(stderr, "Aborting.\n");
+				programmer_shutdown();
 				return 1;
 			} else {
 				fprintf(stderr, "Continuing anyway.\n");
@@ -992,14 +1024,17 @@ int main(int argc, char *argv[])
 		}
 		if ((image = fopen(filename, "r")) == NULL) {
 			perror(filename);
+			programmer_shutdown();
 			exit(1);
 		}
 		if (fstat(fileno(image), &image_stat) != 0) {
 			perror(filename);
+			programmer_shutdown();
 			exit(1);
 		}
 		if (image_stat.st_size != flash->total_size * 1024) {
 			fprintf(stderr, "Error: Image size doesn't match\n");
+			programmer_shutdown();
 			exit(1);
 		}
 
@@ -1008,6 +1043,7 @@ int main(int argc, char *argv[])
 		fclose(image);
 		if (numbytes != size) {
 			fprintf(stderr, "Error: Failed to read file. Got %ld bytes, wanted %ld!\n", numbytes, size);
+			programmer_shutdown();
 			return 1;
 		}
 	}
@@ -1022,12 +1058,14 @@ int main(int argc, char *argv[])
 		printf("Writing flash chip... ");
 		if (!flash->write) {
 			fprintf(stderr, "Error: flashrom has no write function for this flash chip.\n");
+			programmer_shutdown();
 			return 1;
 		}
 		ret = flash->write(flash, buf);
 		if (ret) {
 			fprintf(stderr, "FAILED!\n");
 			emergency_help_message();
+			programmer_shutdown();
 			return 1;
 		} else {
 			printf("COMPLETE.\n");