1 /*
2  * QTest testcase for STM32L4x5_SYSCFG
3  *
4  * Copyright (c) 2024 Arnaud Minier <arnaud.minier@telecom-paris.fr>
5  * Copyright (c) 2024 Inès Varhol <ines.varhol@telecom-paris.fr>
6  *
7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
8  * See the COPYING file in the top-level directory.
9  */
10 
11 #include "qemu/osdep.h"
12 #include "libqtest-single.h"
13 
14 #define SYSCFG_BASE_ADDR 0x40010000
15 #define SYSCFG_MEMRMP 0x00
16 #define SYSCFG_CFGR1 0x04
17 #define SYSCFG_EXTICR1 0x08
18 #define SYSCFG_EXTICR2 0x0C
19 #define SYSCFG_EXTICR3 0x10
20 #define SYSCFG_EXTICR4 0x14
21 #define SYSCFG_SCSR 0x18
22 #define SYSCFG_CFGR2 0x1C
23 #define SYSCFG_SWPR 0x20
24 #define SYSCFG_SKR 0x24
25 #define SYSCFG_SWPR2 0x28
26 #define INVALID_ADDR 0x2C
27 
28 /* SoC forwards GPIOs to SysCfg */
29 #define SYSCFG "/machine/soc"
30 #define EXTI "/machine/soc/exti"
31 
32 static void syscfg_writel(unsigned int offset, uint32_t value)
33 {
34     writel(SYSCFG_BASE_ADDR + offset, value);
35 }
36 
37 static uint32_t syscfg_readl(unsigned int offset)
38 {
39     return readl(SYSCFG_BASE_ADDR + offset);
40 }
41 
42 static void syscfg_set_irq(int num, int level)
43 {
44    qtest_set_irq_in(global_qtest, SYSCFG, NULL, num, level);
45 }
46 
47 static void system_reset(void)
48 {
49     QDict *response;
50     response = qtest_qmp(global_qtest, "{'execute': 'system_reset'}");
51     g_assert(qdict_haskey(response, "return"));
52     qobject_unref(response);
53 }
54 
55 static void test_reset(void)
56 {
57     /*
58      * Test that registers are initialized at the correct values
59      */
60     g_assert_cmphex(syscfg_readl(SYSCFG_MEMRMP), ==, 0x00000000);
61 
62     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR1), ==, 0x7C000001);
63 
64     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR1), ==, 0x00000000);
65 
66     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR2), ==, 0x00000000);
67 
68     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR3), ==, 0x00000000);
69 
70     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR4), ==, 0x00000000);
71 
72     g_assert_cmphex(syscfg_readl(SYSCFG_SCSR), ==, 0x00000000);
73 
74     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR2), ==, 0x00000000);
75 
76     g_assert_cmphex(syscfg_readl(SYSCFG_SWPR), ==, 0x00000000);
77 
78     g_assert_cmphex(syscfg_readl(SYSCFG_SKR), ==, 0x00000000);
79 
80     g_assert_cmphex(syscfg_readl(SYSCFG_SWPR2), ==, 0x00000000);
81 }
82 
83 static void test_reserved_bits(void)
84 {
85     /*
86      * Test that reserved bits stay at reset value
87      * (which is 0 for all of them) by writing '1'
88      * in all reserved bits (keeping reset value for
89      * other bits) and checking that the
90      * register is still at reset value
91      */
92     syscfg_writel(SYSCFG_MEMRMP, 0xFFFFFEF8);
93     g_assert_cmphex(syscfg_readl(SYSCFG_MEMRMP), ==, 0x00000000);
94 
95     syscfg_writel(SYSCFG_CFGR1, 0x7F00FEFF);
96     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR1), ==, 0x7C000001);
97 
98     syscfg_writel(SYSCFG_EXTICR1, 0xFFFF0000);
99     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR1), ==, 0x00000000);
100 
101     syscfg_writel(SYSCFG_EXTICR2, 0xFFFF0000);
102     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR2), ==, 0x00000000);
103 
104     syscfg_writel(SYSCFG_EXTICR3, 0xFFFF0000);
105     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR3), ==, 0x00000000);
106 
107     syscfg_writel(SYSCFG_EXTICR4, 0xFFFF0000);
108     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR4), ==, 0x00000000);
109 
110     syscfg_writel(SYSCFG_SKR, 0xFFFFFF00);
111     g_assert_cmphex(syscfg_readl(SYSCFG_SKR), ==, 0x00000000);
112 }
113 
114 static void test_set_and_clear(void)
115 {
116     /*
117      * Test that regular bits can be set and cleared
118      */
119     syscfg_writel(SYSCFG_MEMRMP, 0x00000107);
120     g_assert_cmphex(syscfg_readl(SYSCFG_MEMRMP), ==, 0x00000107);
121     syscfg_writel(SYSCFG_MEMRMP, 0x00000000);
122     g_assert_cmphex(syscfg_readl(SYSCFG_MEMRMP), ==, 0x00000000);
123 
124     /* cfgr1 bit 0 is clear only so we keep it set */
125     syscfg_writel(SYSCFG_CFGR1, 0xFCFF0101);
126     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR1), ==, 0xFCFF0101);
127     syscfg_writel(SYSCFG_CFGR1, 0x00000001);
128     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR1), ==, 0x00000001);
129 
130     syscfg_writel(SYSCFG_EXTICR1, 0x0000FFFF);
131     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR1), ==, 0x0000FFFF);
132     syscfg_writel(SYSCFG_EXTICR1, 0x00000000);
133     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR1), ==, 0x00000000);
134 
135     syscfg_writel(SYSCFG_EXTICR2, 0x0000FFFF);
136     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR2), ==, 0x0000FFFF);
137     syscfg_writel(SYSCFG_EXTICR2, 0x00000000);
138     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR2), ==, 0x00000000);
139 
140     syscfg_writel(SYSCFG_EXTICR3, 0x0000FFFF);
141     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR3), ==, 0x0000FFFF);
142     syscfg_writel(SYSCFG_EXTICR3, 0x00000000);
143     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR3), ==, 0x00000000);
144 
145     syscfg_writel(SYSCFG_EXTICR4, 0x0000FFFF);
146     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR4), ==, 0x0000FFFF);
147     syscfg_writel(SYSCFG_EXTICR4, 0x00000000);
148     g_assert_cmphex(syscfg_readl(SYSCFG_EXTICR4), ==, 0x00000000);
149 
150     syscfg_writel(SYSCFG_SKR, 0x000000FF);
151     g_assert_cmphex(syscfg_readl(SYSCFG_SKR), ==, 0x000000FF);
152     syscfg_writel(SYSCFG_SKR, 0x00000000);
153     g_assert_cmphex(syscfg_readl(SYSCFG_SKR), ==, 0x00000000);
154 }
155 
156 static void test_clear_by_writing_1(void)
157 {
158     /*
159      * Test that writing '1' doesn't set the bit
160      */
161     syscfg_writel(SYSCFG_CFGR2, 0x00000100);
162     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR2), ==, 0x00000000);
163 }
164 
165 static void test_set_only_bits(void)
166 {
167     /*
168      * Test that set only bits stay can't be cleared
169      */
170     syscfg_writel(SYSCFG_CFGR2, 0x0000000F);
171     syscfg_writel(SYSCFG_CFGR2, 0x00000000);
172     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR2), ==, 0x0000000F);
173 
174     syscfg_writel(SYSCFG_SWPR, 0xFFFFFFFF);
175     syscfg_writel(SYSCFG_SWPR, 0x00000000);
176     g_assert_cmphex(syscfg_readl(SYSCFG_SWPR), ==, 0xFFFFFFFF);
177 
178     syscfg_writel(SYSCFG_SWPR2, 0xFFFFFFFF);
179     syscfg_writel(SYSCFG_SWPR2, 0x00000000);
180     g_assert_cmphex(syscfg_readl(SYSCFG_SWPR2), ==, 0xFFFFFFFF);
181 
182     system_reset();
183 }
184 
185 static void test_clear_only_bits(void)
186 {
187     /*
188      * Test that clear only bits stay can't be set
189      */
190     syscfg_writel(SYSCFG_CFGR1, 0x00000000);
191     syscfg_writel(SYSCFG_CFGR1, 0x00000001);
192     g_assert_cmphex(syscfg_readl(SYSCFG_CFGR1), ==, 0x00000000);
193 
194     system_reset();
195 }
196 
197 static void test_interrupt(void)
198 {
199     /*
200      * Test that GPIO rising lines result in an irq
201      * with the right configuration
202      */
203     qtest_irq_intercept_in(global_qtest, EXTI);
204 
205     /* GPIOA is the default source for EXTI lines 0 to 15 */
206 
207     syscfg_set_irq(0, 1);
208 
209     g_assert_true(get_irq(0));
210 
211 
212     syscfg_set_irq(15, 1);
213 
214     g_assert_true(get_irq(15));
215 
216     /* Configure GPIOB[1] as the source input for EXTI1 */
217     syscfg_writel(SYSCFG_EXTICR1, 0x00000010);
218 
219     syscfg_set_irq(17, 1);
220 
221     g_assert_true(get_irq(1));
222 
223     /* Clean the test */
224     syscfg_writel(SYSCFG_EXTICR1, 0x00000000);
225     syscfg_set_irq(0, 0);
226     syscfg_set_irq(15, 0);
227     syscfg_set_irq(17, 0);
228 }
229 
230 static void test_irq_pin_multiplexer(void)
231 {
232     /*
233      * Test that syscfg irq sets the right exti irq
234      */
235 
236     qtest_irq_intercept_in(global_qtest, EXTI);
237 
238     syscfg_set_irq(0, 1);
239 
240     /* Check that irq 0 was set and irq 15 wasn't */
241     g_assert_true(get_irq(0));
242     g_assert_false(get_irq(15));
243 
244     /* Clean the test */
245     syscfg_set_irq(0, 0);
246 
247     syscfg_set_irq(15, 1);
248 
249     /* Check that irq 15 was set and irq 0 wasn't */
250     g_assert_true(get_irq(15));
251     g_assert_false(get_irq(0));
252 
253     /* Clean the test */
254     syscfg_set_irq(15, 0);
255 }
256 
257 static void test_irq_gpio_multiplexer(void)
258 {
259     /*
260      * Test that an irq is generated only by the right GPIO
261      */
262 
263     qtest_irq_intercept_in(global_qtest, EXTI);
264 
265     /* GPIOA is the default source for EXTI lines 0 to 15 */
266 
267     /* Check that setting rising pin GPIOA[0] generates an irq */
268     syscfg_set_irq(0, 1);
269 
270     g_assert_true(get_irq(0));
271 
272     /* Clean the test */
273     syscfg_set_irq(0, 0);
274 
275     /* Check that setting rising pin GPIOB[0] doesn't generate an irq */
276     syscfg_set_irq(16, 1);
277 
278     g_assert_false(get_irq(0));
279 
280     /* Clean the test */
281     syscfg_set_irq(16, 0);
282 
283     /* Configure GPIOB[0] as the source input for EXTI0 */
284     syscfg_writel(SYSCFG_EXTICR1, 0x00000001);
285 
286     /* Check that setting rising pin GPIOA[0] doesn't generate an irq */
287     syscfg_set_irq(0, 1);
288 
289     g_assert_false(get_irq(0));
290 
291     /* Clean the test */
292     syscfg_set_irq(0, 0);
293 
294     /* Check that setting rising pin GPIOB[0] generates an irq */
295     syscfg_set_irq(16, 1);
296 
297     g_assert_true(get_irq(0));
298 
299     /* Clean the test */
300     syscfg_set_irq(16, 0);
301     syscfg_writel(SYSCFG_EXTICR1, 0x00000000);
302 }
303 
304 int main(int argc, char **argv)
305 {
306     int ret;
307 
308     g_test_init(&argc, &argv, NULL);
309     g_test_set_nonfatal_assertions();
310 
311     qtest_add_func("stm32l4x5/syscfg/test_reset", test_reset);
312     qtest_add_func("stm32l4x5/syscfg/test_reserved_bits",
313                    test_reserved_bits);
314     qtest_add_func("stm32l4x5/syscfg/test_set_and_clear",
315                    test_set_and_clear);
316     qtest_add_func("stm32l4x5/syscfg/test_clear_by_writing_1",
317                    test_clear_by_writing_1);
318     qtest_add_func("stm32l4x5/syscfg/test_set_only_bits",
319                    test_set_only_bits);
320     qtest_add_func("stm32l4x5/syscfg/test_clear_only_bits",
321                    test_clear_only_bits);
322     qtest_add_func("stm32l4x5/syscfg/test_interrupt",
323                    test_interrupt);
324     qtest_add_func("stm32l4x5/syscfg/test_irq_pin_multiplexer",
325                    test_irq_pin_multiplexer);
326     qtest_add_func("stm32l4x5/syscfg/test_irq_gpio_multiplexer",
327                    test_irq_gpio_multiplexer);
328 
329     qtest_start("-machine b-l475e-iot01a");
330     ret = g_test_run();
331     qtest_end();
332 
333     return ret;
334 }
335