1// SPDX-License-Identifier: GPL-2.0-or-later
  2//
  3// ohci-serdes-test.c - An application of Kunit to check serialization/deserialization of data in
  4//			buffers and registers defined in 1394 OHCI specification.
  5//
  6// Copyright (c) 2024 Takashi Sakamoto
  7
  8#include <kunit/test.h>
  9
 10#include "ohci.h"
 11
 12
 13static void test_self_id_count_register_deserialization(struct kunit *test)
 14{
 15	const u32 expected = 0x803d0594;
 16
 17	bool is_error = ohci1394_self_id_count_is_error(expected);
 18	u8 generation = ohci1394_self_id_count_get_generation(expected);
 19	u32 size = ohci1394_self_id_count_get_size(expected);
 20
 21	KUNIT_EXPECT_TRUE(test, is_error);
 22	KUNIT_EXPECT_EQ(test, 0x3d, generation);
 23	KUNIT_EXPECT_EQ(test, 0x165, size);
 24}
 25
 26static void test_self_id_receive_buffer_deserialization(struct kunit *test)
 27{
 28	const u32 buffer[] = {
 29		0x0006f38b,
 30		0x807fcc56,
 31		0x7f8033a9,
 32		0x8145cc5e,
 33		0x7eba33a1,
 34	};
 35
 36	u8 generation = ohci1394_self_id_receive_q0_get_generation(buffer[0]);
 37	u16 timestamp = ohci1394_self_id_receive_q0_get_timestamp(buffer[0]);
 38
 39	KUNIT_EXPECT_EQ(test, 0x6, generation);
 40	KUNIT_EXPECT_EQ(test, 0xf38b, timestamp);
 41}
 42
 43static void test_at_data_serdes(struct kunit *test)
 44{
 45	static const __le32 expected[] = {
 46		cpu_to_le32(0x00020e80),
 47		cpu_to_le32(0xffc2ffff),
 48		cpu_to_le32(0xe0000000),
 49	};
 50	__le32 quadlets[] = {0, 0, 0};
 51	bool has_src_bus_id = ohci1394_at_data_get_src_bus_id(expected);
 52	unsigned int speed = ohci1394_at_data_get_speed(expected);
 53	unsigned int tlabel = ohci1394_at_data_get_tlabel(expected);
 54	unsigned int retry = ohci1394_at_data_get_retry(expected);
 55	unsigned int tcode = ohci1394_at_data_get_tcode(expected);
 56	unsigned int destination_id = ohci1394_at_data_get_destination_id(expected);
 57	u64 destination_offset = ohci1394_at_data_get_destination_offset(expected);
 58
 59	KUNIT_EXPECT_FALSE(test, has_src_bus_id);
 60	KUNIT_EXPECT_EQ(test, 0x02, speed);
 61	KUNIT_EXPECT_EQ(test, 0x03, tlabel);
 62	KUNIT_EXPECT_EQ(test, 0x02, retry);
 63	KUNIT_EXPECT_EQ(test, 0x08, tcode);
 64
 65	ohci1394_at_data_set_src_bus_id(quadlets, has_src_bus_id);
 66	ohci1394_at_data_set_speed(quadlets, speed);
 67	ohci1394_at_data_set_tlabel(quadlets, tlabel);
 68	ohci1394_at_data_set_retry(quadlets, retry);
 69	ohci1394_at_data_set_tcode(quadlets, tcode);
 70	ohci1394_at_data_set_destination_id(quadlets, destination_id);
 71	ohci1394_at_data_set_destination_offset(quadlets, destination_offset);
 72
 73	KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
 74}
 75
 76static void test_it_data_serdes(struct kunit *test)
 77{
 78	static const __le32 expected[] = {
 79		cpu_to_le32(0x000349a7),
 80		cpu_to_le32(0x02300000),
 81	};
 82	__le32 quadlets[] = {0, 0};
 83	unsigned int scode = ohci1394_it_data_get_speed(expected);
 84	unsigned int tag = ohci1394_it_data_get_tag(expected);
 85	unsigned int channel = ohci1394_it_data_get_channel(expected);
 86	unsigned int tcode = ohci1394_it_data_get_tcode(expected);
 87	unsigned int sync = ohci1394_it_data_get_sync(expected);
 88	unsigned int data_length = ohci1394_it_data_get_data_length(expected);
 89
 90	KUNIT_EXPECT_EQ(test, 0x03, scode);
 91	KUNIT_EXPECT_EQ(test, 0x01, tag);
 92	KUNIT_EXPECT_EQ(test, 0x09, channel);
 93	KUNIT_EXPECT_EQ(test, 0x0a, tcode);
 94	KUNIT_EXPECT_EQ(test, 0x7, sync);
 95	KUNIT_EXPECT_EQ(test, 0x0230, data_length);
 96
 97	ohci1394_it_data_set_speed(quadlets, scode);
 98	ohci1394_it_data_set_tag(quadlets, tag);
 99	ohci1394_it_data_set_channel(quadlets, channel);
100	ohci1394_it_data_set_tcode(quadlets, tcode);
101	ohci1394_it_data_set_sync(quadlets, sync);
102	ohci1394_it_data_set_data_length(quadlets, data_length);
103
104	KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
105}
106
107static struct kunit_case ohci_serdes_test_cases[] = {
108	KUNIT_CASE(test_self_id_count_register_deserialization),
109	KUNIT_CASE(test_self_id_receive_buffer_deserialization),
110	KUNIT_CASE(test_at_data_serdes),
111	KUNIT_CASE(test_it_data_serdes),
112	{}
113};
114
115static struct kunit_suite ohci_serdes_test_suite = {
116	.name = "firewire-ohci-serdes",
117	.test_cases = ohci_serdes_test_cases,
118};
119kunit_test_suite(ohci_serdes_test_suite);
120
121MODULE_DESCRIPTION("FireWire buffers and registers serialization/deserialization unit test suite");
122MODULE_LICENSE("GPL");