sfdp: Only read page size when basic table is 11+ DWORDs

src/target/sfdp.c

@@ -71,6 +71,7 @@ static spi_parameters_s sfdp_read_basic_parameter_table(
 	sfdp_basic_parameter_table_s parameter_table;
 	const size_t table_length = MIN(sizeof(sfdp_basic_parameter_table_s), length);
 	spi_read(target, SPI_FLASH_CMD_READ_SFDP, address, &parameter_table, table_length);
+	sfdp_debug_print(address, &parameter_table, table_length);
 
 	spi_parameters_s result = {0};
 	result.capacity = sfdp_memory_density_to_capacity_bits(parameter_table.memory_density) >> 3U;
@@ -82,7 +83,14 @@ static spi_parameters_s sfdp_read_basic_parameter_table(
 			break;
 		}
 	}
-	result.page_size = SFDP_PAGE_SIZE(parameter_table);
+	// The timing and page size DWORD was added in JESD216A. Before then, the
+	// table is 9 DWORDs and we default to page size 256.
+	if (length >= 4 * 11) {
+		result.page_size = SFDP_PAGE_SIZE(parameter_table);
+	} else {
+		result.page_size = 256;
+	}
+
 	return result;
 }