| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * Copyright (c) 2025, Qualcomm Innovation Center, Inc. All rights reserved. |
| 4 | */ |
| 5 | |
| 6 | #define pr_fmt(fmt) "tlmm-test: " fmt |
| 7 | |
| 8 | #include <kunit/test.h> |
| 9 | #include <linux/delay.h> |
| 10 | #include <linux/gpio/consumer.h> |
| 11 | #include <linux/interrupt.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/of.h> |
| 15 | #include <linux/of_address.h> |
| 16 | #include <linux/of_irq.h> |
| 17 | #include <linux/pinctrl/consumer.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/slab.h> |
| 20 | |
| 21 | /* |
| 22 | * This TLMM test module serves the purpose of validating that the TLMM driver |
| 23 | * (pinctrl-msm) delivers expected number of interrupts in response to changing |
| 24 | * GPIO state. |
| 25 | * |
| 26 | * To achieve this without external equipment the test takes a module parameter |
| 27 | * "gpio", which the tester is expected to specify an unused and non-connected |
| 28 | * pin. The GPIO state is then driven by adjusting the bias of the pin, at |
| 29 | * suitable times through the different test cases. |
| 30 | * |
| 31 | * Upon execution, the test initialization will find the TLMM node (subject to |
| 32 | * tlmm_of_match[] allow listing) and create the necessary references |
| 33 | * dynamically, rather then relying on e.g. Devicetree and phandles. |
| 34 | */ |
| 35 | |
| 36 | #define MSM_PULL_MASK GENMASK(2, 0) |
| 37 | #define MSM_PULL_DOWN 1 |
| 38 | #define MSM_PULL_UP 3 |
| 39 | #define TLMM_REG_SIZE 0x1000 |
| 40 | |
| 41 | static int tlmm_test_gpio = -1; |
| 42 | static char *tlmm_reg_name = "default_region" ; |
| 43 | |
| 44 | module_param_named(gpio, tlmm_test_gpio, int, 0600); |
| 45 | module_param_named(name, tlmm_reg_name, charp, 0600); |
| 46 | |
| 47 | static struct { |
| 48 | void __iomem *base; |
| 49 | void __iomem *reg; |
| 50 | int irq; |
| 51 | |
| 52 | u32 low_val; |
| 53 | u32 high_val; |
| 54 | } tlmm_suite; |
| 55 | |
| 56 | /** |
| 57 | * struct tlmm_test_priv - Per-test context |
| 58 | * @intr_count: number of times hard handler was hit with TLMM_TEST_COUNT op set |
| 59 | * @thread_count: number of times thread handler was hit with TLMM_TEST_COUNT op set |
| 60 | * @intr_op: operations to be performed by the hard IRQ handler |
| 61 | * @intr_op_remain: number of times the TLMM_TEST_THEN_* operations should be |
| 62 | * performed by the hard IRQ handler |
| 63 | * @thread_op: operations to be performed by the threaded IRQ handler |
| 64 | * @thread_op_remain: number of times the TLMM_TEST_THEN_* operations should |
| 65 | * be performed by the threaded IRQ handler |
| 66 | */ |
| 67 | struct tlmm_test_priv { |
| 68 | atomic_t intr_count; |
| 69 | atomic_t thread_count; |
| 70 | |
| 71 | unsigned int intr_op; |
| 72 | atomic_t intr_op_remain; |
| 73 | |
| 74 | unsigned int thread_op; |
| 75 | atomic_t thread_op_remain; |
| 76 | }; |
| 77 | |
| 78 | /* Operation masks for @intr_op and @thread_op */ |
| 79 | #define TLMM_TEST_COUNT BIT(0) |
| 80 | #define TLMM_TEST_OUTPUT_LOW BIT(1) |
| 81 | #define TLMM_TEST_OUTPUT_HIGH BIT(2) |
| 82 | #define TLMM_TEST_THEN_HIGH BIT(3) |
| 83 | #define TLMM_TEST_THEN_LOW BIT(4) |
| 84 | #define TLMM_TEST_WAKE_THREAD BIT(5) |
| 85 | |
| 86 | static void tlmm_output_low(void) |
| 87 | { |
| 88 | writel(val: tlmm_suite.low_val, addr: tlmm_suite.reg); |
| 89 | readl(addr: tlmm_suite.reg); |
| 90 | } |
| 91 | |
| 92 | static void tlmm_output_high(void) |
| 93 | { |
| 94 | writel(val: tlmm_suite.high_val, addr: tlmm_suite.reg); |
| 95 | readl(addr: tlmm_suite.reg); |
| 96 | } |
| 97 | |
| 98 | static irqreturn_t tlmm_test_intr_fn(int irq, void *dev_id) |
| 99 | { |
| 100 | struct tlmm_test_priv *priv = dev_id; |
| 101 | |
| 102 | if (priv->intr_op & TLMM_TEST_COUNT) |
| 103 | atomic_inc(v: &priv->intr_count); |
| 104 | |
| 105 | if (priv->intr_op & TLMM_TEST_OUTPUT_LOW) |
| 106 | tlmm_output_low(); |
| 107 | if (priv->intr_op & TLMM_TEST_OUTPUT_HIGH) |
| 108 | tlmm_output_high(); |
| 109 | |
| 110 | if (atomic_dec_if_positive(v: &priv->intr_op_remain) > 0) { |
| 111 | udelay(usec: 1); |
| 112 | |
| 113 | if (priv->intr_op & TLMM_TEST_THEN_LOW) |
| 114 | tlmm_output_low(); |
| 115 | if (priv->intr_op & TLMM_TEST_THEN_HIGH) |
| 116 | tlmm_output_high(); |
| 117 | } |
| 118 | |
| 119 | return priv->intr_op & TLMM_TEST_WAKE_THREAD ? IRQ_WAKE_THREAD : IRQ_HANDLED; |
| 120 | } |
| 121 | |
| 122 | static irqreturn_t tlmm_test_intr_thread_fn(int irq, void *dev_id) |
| 123 | { |
| 124 | struct tlmm_test_priv *priv = dev_id; |
| 125 | |
| 126 | if (priv->thread_op & TLMM_TEST_COUNT) |
| 127 | atomic_inc(v: &priv->thread_count); |
| 128 | |
| 129 | if (priv->thread_op & TLMM_TEST_OUTPUT_LOW) |
| 130 | tlmm_output_low(); |
| 131 | if (priv->thread_op & TLMM_TEST_OUTPUT_HIGH) |
| 132 | tlmm_output_high(); |
| 133 | |
| 134 | if (atomic_dec_if_positive(v: &priv->thread_op_remain) > 0) { |
| 135 | udelay(usec: 1); |
| 136 | if (priv->thread_op & TLMM_TEST_THEN_LOW) |
| 137 | tlmm_output_low(); |
| 138 | if (priv->thread_op & TLMM_TEST_THEN_HIGH) |
| 139 | tlmm_output_high(); |
| 140 | } |
| 141 | |
| 142 | return IRQ_HANDLED; |
| 143 | } |
| 144 | |
| 145 | static void tlmm_test_request_hard_irq(struct kunit *test, unsigned long irqflags) |
| 146 | { |
| 147 | struct tlmm_test_priv *priv = test->priv; |
| 148 | int ret; |
| 149 | |
| 150 | ret = request_irq(irq: tlmm_suite.irq, handler: tlmm_test_intr_fn, flags: irqflags, name: test->name, dev: priv); |
| 151 | KUNIT_EXPECT_EQ(test, ret, 0); |
| 152 | } |
| 153 | |
| 154 | static void tlmm_test_request_threaded_irq(struct kunit *test, unsigned long irqflags) |
| 155 | { |
| 156 | struct tlmm_test_priv *priv = test->priv; |
| 157 | int ret; |
| 158 | |
| 159 | ret = request_threaded_irq(irq: tlmm_suite.irq, |
| 160 | handler: tlmm_test_intr_fn, thread_fn: tlmm_test_intr_thread_fn, |
| 161 | flags: irqflags, name: test->name, dev: priv); |
| 162 | |
| 163 | KUNIT_EXPECT_EQ(test, ret, 0); |
| 164 | } |
| 165 | |
| 166 | static void tlmm_test_silent(struct kunit *test, unsigned long irqflags) |
| 167 | { |
| 168 | struct tlmm_test_priv *priv = test->priv; |
| 169 | |
| 170 | priv->intr_op = TLMM_TEST_COUNT; |
| 171 | |
| 172 | /* GPIO line at non-triggering level */ |
| 173 | if (irqflags == IRQF_TRIGGER_LOW || irqflags == IRQF_TRIGGER_FALLING) |
| 174 | tlmm_output_high(); |
| 175 | else |
| 176 | tlmm_output_low(); |
| 177 | |
| 178 | tlmm_test_request_hard_irq(test, irqflags); |
| 179 | msleep(msecs: 100); |
| 180 | free_irq(tlmm_suite.irq, priv); |
| 181 | |
| 182 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 0); |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * Test that no RISING interrupts are triggered on a silent pin |
| 187 | */ |
| 188 | static void tlmm_test_silent_rising(struct kunit *test) |
| 189 | { |
| 190 | tlmm_test_silent(test, IRQF_TRIGGER_RISING); |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Test that no FALLING interrupts are triggered on a silent pin |
| 195 | */ |
| 196 | static void tlmm_test_silent_falling(struct kunit *test) |
| 197 | { |
| 198 | tlmm_test_silent(test, IRQF_TRIGGER_FALLING); |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * Test that no LOW interrupts are triggered on a silent pin |
| 203 | */ |
| 204 | static void tlmm_test_silent_low(struct kunit *test) |
| 205 | { |
| 206 | tlmm_test_silent(test, IRQF_TRIGGER_LOW); |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Test that no HIGH interrupts are triggered on a silent pin |
| 211 | */ |
| 212 | static void tlmm_test_silent_high(struct kunit *test) |
| 213 | { |
| 214 | tlmm_test_silent(test, IRQF_TRIGGER_HIGH); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Square wave with 10 high pulses, assert that we get 10 rising interrupts |
| 219 | */ |
| 220 | static void tlmm_test_rising(struct kunit *test) |
| 221 | { |
| 222 | struct tlmm_test_priv *priv = test->priv; |
| 223 | int i; |
| 224 | |
| 225 | priv->intr_op = TLMM_TEST_COUNT; |
| 226 | |
| 227 | tlmm_output_low(); |
| 228 | |
| 229 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_RISING); |
| 230 | for (i = 0; i < 10; i++) { |
| 231 | tlmm_output_low(); |
| 232 | msleep(msecs: 20); |
| 233 | tlmm_output_high(); |
| 234 | msleep(msecs: 20); |
| 235 | } |
| 236 | |
| 237 | free_irq(tlmm_suite.irq, priv); |
| 238 | |
| 239 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Square wave with 10 low pulses, assert that we get 10 falling interrupts |
| 244 | */ |
| 245 | static void tlmm_test_falling(struct kunit *test) |
| 246 | { |
| 247 | struct tlmm_test_priv *priv = test->priv; |
| 248 | int i; |
| 249 | |
| 250 | priv->intr_op = TLMM_TEST_COUNT; |
| 251 | |
| 252 | tlmm_output_high(); |
| 253 | |
| 254 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_FALLING); |
| 255 | for (i = 0; i < 10; i++) { |
| 256 | tlmm_output_high(); |
| 257 | msleep(msecs: 20); |
| 258 | tlmm_output_low(); |
| 259 | msleep(msecs: 20); |
| 260 | } |
| 261 | free_irq(tlmm_suite.irq, priv); |
| 262 | |
| 263 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Drive line low 10 times, handler drives it high to "clear the interrupt |
| 268 | * source", assert we get 10 interrupts |
| 269 | */ |
| 270 | static void tlmm_test_low(struct kunit *test) |
| 271 | { |
| 272 | struct tlmm_test_priv *priv = test->priv; |
| 273 | int i; |
| 274 | |
| 275 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_HIGH; |
| 276 | atomic_set(v: &priv->intr_op_remain, i: 9); |
| 277 | |
| 278 | tlmm_output_high(); |
| 279 | |
| 280 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_LOW); |
| 281 | for (i = 0; i < 10; i++) { |
| 282 | msleep(msecs: 20); |
| 283 | tlmm_output_low(); |
| 284 | } |
| 285 | msleep(msecs: 100); |
| 286 | free_irq(tlmm_suite.irq, priv); |
| 287 | |
| 288 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Drive line high 10 times, handler drives it low to "clear the interrupt |
| 293 | * source", assert we get 10 interrupts |
| 294 | */ |
| 295 | static void tlmm_test_high(struct kunit *test) |
| 296 | { |
| 297 | struct tlmm_test_priv *priv = test->priv; |
| 298 | int i; |
| 299 | |
| 300 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_LOW; |
| 301 | atomic_set(v: &priv->intr_op_remain, i: 9); |
| 302 | |
| 303 | tlmm_output_low(); |
| 304 | |
| 305 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_HIGH); |
| 306 | for (i = 0; i < 10; i++) { |
| 307 | msleep(msecs: 20); |
| 308 | tlmm_output_high(); |
| 309 | } |
| 310 | msleep(msecs: 100); |
| 311 | free_irq(tlmm_suite.irq, priv); |
| 312 | |
| 313 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Handler drives GPIO high to "clear the interrupt source", then low to |
| 318 | * simulate a new interrupt, repeated 10 times, assert we get 10 interrupts |
| 319 | */ |
| 320 | static void tlmm_test_falling_in_handler(struct kunit *test) |
| 321 | { |
| 322 | struct tlmm_test_priv *priv = test->priv; |
| 323 | |
| 324 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_HIGH | TLMM_TEST_THEN_LOW; |
| 325 | atomic_set(v: &priv->intr_op_remain, i: 10); |
| 326 | |
| 327 | tlmm_output_high(); |
| 328 | |
| 329 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_FALLING); |
| 330 | msleep(msecs: 20); |
| 331 | tlmm_output_low(); |
| 332 | msleep(msecs: 100); |
| 333 | free_irq(tlmm_suite.irq, priv); |
| 334 | |
| 335 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Handler drives GPIO low to "clear the interrupt source", then high to |
| 340 | * simulate a new interrupt, repeated 10 times, assert we get 10 interrupts |
| 341 | */ |
| 342 | static void tlmm_test_rising_in_handler(struct kunit *test) |
| 343 | { |
| 344 | struct tlmm_test_priv *priv = test->priv; |
| 345 | |
| 346 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_LOW | TLMM_TEST_THEN_HIGH; |
| 347 | atomic_set(v: &priv->intr_op_remain, i: 10); |
| 348 | |
| 349 | tlmm_output_low(); |
| 350 | |
| 351 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_RISING); |
| 352 | msleep(msecs: 20); |
| 353 | tlmm_output_high(); |
| 354 | msleep(msecs: 100); |
| 355 | free_irq(tlmm_suite.irq, priv); |
| 356 | |
| 357 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 358 | } |
| 359 | |
| 360 | /* |
| 361 | * Square wave with 10 high pulses, assert that we get 10 rising hard and |
| 362 | * 10 threaded interrupts |
| 363 | */ |
| 364 | static void tlmm_test_thread_rising(struct kunit *test) |
| 365 | { |
| 366 | struct tlmm_test_priv *priv = test->priv; |
| 367 | int i; |
| 368 | |
| 369 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_WAKE_THREAD; |
| 370 | priv->thread_op = TLMM_TEST_COUNT; |
| 371 | |
| 372 | tlmm_output_low(); |
| 373 | |
| 374 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_RISING); |
| 375 | for (i = 0; i < 10; i++) { |
| 376 | tlmm_output_low(); |
| 377 | msleep(msecs: 20); |
| 378 | tlmm_output_high(); |
| 379 | msleep(msecs: 20); |
| 380 | } |
| 381 | free_irq(tlmm_suite.irq, priv); |
| 382 | |
| 383 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 384 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * Square wave with 10 low pulses, assert that we get 10 falling interrupts |
| 389 | */ |
| 390 | static void tlmm_test_thread_falling(struct kunit *test) |
| 391 | { |
| 392 | struct tlmm_test_priv *priv = test->priv; |
| 393 | int i; |
| 394 | |
| 395 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_WAKE_THREAD; |
| 396 | priv->thread_op = TLMM_TEST_COUNT; |
| 397 | |
| 398 | tlmm_output_high(); |
| 399 | |
| 400 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_FALLING); |
| 401 | for (i = 0; i < 10; i++) { |
| 402 | tlmm_output_high(); |
| 403 | msleep(msecs: 20); |
| 404 | tlmm_output_low(); |
| 405 | msleep(msecs: 20); |
| 406 | } |
| 407 | free_irq(tlmm_suite.irq, priv); |
| 408 | |
| 409 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 410 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * Drive line high 10 times, threaded handler drives it low to "clear the |
| 415 | * interrupt source", assert we get 10 interrupts |
| 416 | */ |
| 417 | static void tlmm_test_thread_high(struct kunit *test) |
| 418 | { |
| 419 | struct tlmm_test_priv *priv = test->priv; |
| 420 | int i; |
| 421 | |
| 422 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_WAKE_THREAD; |
| 423 | priv->thread_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_LOW; |
| 424 | |
| 425 | tlmm_output_low(); |
| 426 | |
| 427 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_HIGH | IRQF_ONESHOT); |
| 428 | for (i = 0; i < 10; i++) { |
| 429 | tlmm_output_high(); |
| 430 | msleep(msecs: 20); |
| 431 | } |
| 432 | free_irq(tlmm_suite.irq, priv); |
| 433 | |
| 434 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 435 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Drive line low 10 times, threaded handler drives it high to "clear the |
| 440 | * interrupt source", assert we get 10 interrupts |
| 441 | */ |
| 442 | static void tlmm_test_thread_low(struct kunit *test) |
| 443 | { |
| 444 | struct tlmm_test_priv *priv = test->priv; |
| 445 | int i; |
| 446 | |
| 447 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_WAKE_THREAD; |
| 448 | priv->thread_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_HIGH; |
| 449 | |
| 450 | tlmm_output_high(); |
| 451 | |
| 452 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_LOW | IRQF_ONESHOT); |
| 453 | for (i = 0; i < 10; i++) { |
| 454 | tlmm_output_low(); |
| 455 | msleep(msecs: 20); |
| 456 | } |
| 457 | free_irq(tlmm_suite.irq, priv); |
| 458 | |
| 459 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 460 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 461 | } |
| 462 | |
| 463 | /* |
| 464 | * Handler drives GPIO low to "clear the interrupt source", then high in the |
| 465 | * threaded handler to simulate a new interrupt, repeated 10 times, assert we |
| 466 | * get 10 interrupts |
| 467 | */ |
| 468 | static void tlmm_test_thread_rising_in_handler(struct kunit *test) |
| 469 | { |
| 470 | struct tlmm_test_priv *priv = test->priv; |
| 471 | |
| 472 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_LOW | TLMM_TEST_WAKE_THREAD; |
| 473 | priv->thread_op = TLMM_TEST_COUNT | TLMM_TEST_THEN_HIGH; |
| 474 | atomic_set(v: &priv->thread_op_remain, i: 10); |
| 475 | |
| 476 | tlmm_output_low(); |
| 477 | |
| 478 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_RISING); |
| 479 | msleep(msecs: 20); |
| 480 | tlmm_output_high(); |
| 481 | msleep(msecs: 100); |
| 482 | free_irq(tlmm_suite.irq, priv); |
| 483 | |
| 484 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 485 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Handler drives GPIO high to "clear the interrupt source", then low in the |
| 490 | * threaded handler to simulate a new interrupt, repeated 10 times, assert we |
| 491 | * get 10 interrupts |
| 492 | */ |
| 493 | static void tlmm_test_thread_falling_in_handler(struct kunit *test) |
| 494 | { |
| 495 | struct tlmm_test_priv *priv = test->priv; |
| 496 | |
| 497 | priv->intr_op = TLMM_TEST_COUNT | TLMM_TEST_OUTPUT_HIGH | TLMM_TEST_WAKE_THREAD; |
| 498 | priv->thread_op = TLMM_TEST_COUNT | TLMM_TEST_THEN_LOW; |
| 499 | atomic_set(v: &priv->thread_op_remain, i: 10); |
| 500 | |
| 501 | tlmm_output_high(); |
| 502 | |
| 503 | tlmm_test_request_threaded_irq(test, IRQF_TRIGGER_FALLING); |
| 504 | msleep(msecs: 20); |
| 505 | tlmm_output_low(); |
| 506 | msleep(msecs: 100); |
| 507 | free_irq(tlmm_suite.irq, priv); |
| 508 | |
| 509 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 10); |
| 510 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->thread_count), 10); |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * Validate that edge interrupts occurring while irq is disabled is delivered |
| 515 | * once the interrupt is reenabled. |
| 516 | */ |
| 517 | static void tlmm_test_rising_while_disabled(struct kunit *test) |
| 518 | { |
| 519 | struct tlmm_test_priv *priv = test->priv; |
| 520 | unsigned int after_edge; |
| 521 | unsigned int before_edge; |
| 522 | |
| 523 | priv->intr_op = TLMM_TEST_COUNT; |
| 524 | atomic_set(v: &priv->thread_op_remain, i: 10); |
| 525 | |
| 526 | tlmm_output_low(); |
| 527 | |
| 528 | tlmm_test_request_hard_irq(test, IRQF_TRIGGER_RISING); |
| 529 | msleep(msecs: 20); |
| 530 | |
| 531 | disable_irq(irq: tlmm_suite.irq); |
| 532 | before_edge = atomic_read(v: &priv->intr_count); |
| 533 | |
| 534 | tlmm_output_high(); |
| 535 | msleep(msecs: 20); |
| 536 | after_edge = atomic_read(v: &priv->intr_count); |
| 537 | |
| 538 | msleep(msecs: 20); |
| 539 | enable_irq(irq: tlmm_suite.irq); |
| 540 | msleep(msecs: 20); |
| 541 | |
| 542 | free_irq(tlmm_suite.irq, priv); |
| 543 | |
| 544 | KUNIT_ASSERT_EQ(test, before_edge, 0); |
| 545 | KUNIT_ASSERT_EQ(test, after_edge, 0); |
| 546 | KUNIT_ASSERT_EQ(test, atomic_read(&priv->intr_count), 1); |
| 547 | } |
| 548 | |
| 549 | static int tlmm_test_init(struct kunit *test) |
| 550 | { |
| 551 | struct tlmm_test_priv *priv; |
| 552 | |
| 553 | priv = kunit_kzalloc(test, size: sizeof(*priv), GFP_KERNEL); |
| 554 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv); |
| 555 | |
| 556 | atomic_set(v: &priv->intr_count, i: 0); |
| 557 | atomic_set(v: &priv->thread_count, i: 0); |
| 558 | |
| 559 | atomic_set(v: &priv->intr_op_remain, i: 0); |
| 560 | atomic_set(v: &priv->thread_op_remain, i: 0); |
| 561 | |
| 562 | test->priv = priv; |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * NOTE: When adding compatibles to this list, ensure that TLMM_REG_SIZE and |
| 569 | * pull configuration values are supported and correct. |
| 570 | */ |
| 571 | static const struct of_device_id tlmm_of_match[] = { |
| 572 | { .compatible = "qcom,sc8280xp-tlmm" }, |
| 573 | { .compatible = "qcom,x1e80100-tlmm" }, |
| 574 | {} |
| 575 | }; |
| 576 | |
| 577 | static int tlmm_reg_base(struct device_node *tlmm, struct resource *res) |
| 578 | { |
| 579 | const char **reg_names; |
| 580 | int count; |
| 581 | int ret; |
| 582 | int i; |
| 583 | |
| 584 | count = of_property_count_strings(np: tlmm, propname: "reg-names" ); |
| 585 | if (count <= 0) { |
| 586 | pr_err("failed to find tlmm reg name\n" ); |
| 587 | return count; |
| 588 | } |
| 589 | |
| 590 | reg_names = kcalloc(count, sizeof(char *), GFP_KERNEL); |
| 591 | if (!reg_names) |
| 592 | return -ENOMEM; |
| 593 | |
| 594 | ret = of_property_read_string_array(np: tlmm, propname: "reg-names" , out_strs: reg_names, sz: count); |
| 595 | if (ret != count) { |
| 596 | kfree(objp: reg_names); |
| 597 | return -EINVAL; |
| 598 | } |
| 599 | |
| 600 | if (!strcmp(tlmm_reg_name, "default_region" )) { |
| 601 | ret = of_address_to_resource(dev: tlmm, index: 0, r: res); |
| 602 | } else { |
| 603 | for (i = 0; i < count; i++) { |
| 604 | if (!strcmp(reg_names[i], tlmm_reg_name)) { |
| 605 | ret = of_address_to_resource(dev: tlmm, index: i, r: res); |
| 606 | break; |
| 607 | } |
| 608 | } |
| 609 | if (i == count) |
| 610 | ret = -EINVAL; |
| 611 | } |
| 612 | |
| 613 | kfree(objp: reg_names); |
| 614 | |
| 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | static int tlmm_test_init_suite(struct kunit_suite *suite) |
| 619 | { |
| 620 | struct of_phandle_args args = {}; |
| 621 | struct resource res; |
| 622 | int ret; |
| 623 | u32 val; |
| 624 | |
| 625 | if (tlmm_test_gpio < 0) { |
| 626 | pr_err("use the tlmm-test.gpio module parameter to specify which GPIO to use\n" ); |
| 627 | return -EINVAL; |
| 628 | } |
| 629 | |
| 630 | struct device_node *tlmm __free(device_node) = of_find_matching_node(NULL, matches: tlmm_of_match); |
| 631 | if (!tlmm) { |
| 632 | pr_err("failed to find tlmm node\n" ); |
| 633 | return -EINVAL; |
| 634 | } |
| 635 | |
| 636 | ret = tlmm_reg_base(tlmm, res: &res); |
| 637 | if (ret < 0) |
| 638 | return ret; |
| 639 | |
| 640 | tlmm_suite.base = ioremap(offset: res.start, size: resource_size(res: &res)); |
| 641 | if (!tlmm_suite.base) |
| 642 | return -ENOMEM; |
| 643 | |
| 644 | args.np = tlmm; |
| 645 | args.args_count = 2; |
| 646 | args.args[0] = tlmm_test_gpio; |
| 647 | args.args[1] = 0; |
| 648 | |
| 649 | tlmm_suite.irq = irq_create_of_mapping(irq_data: &args); |
| 650 | if (!tlmm_suite.irq) { |
| 651 | pr_err("failed to map TLMM irq %d\n" , args.args[0]); |
| 652 | goto err_unmap; |
| 653 | } |
| 654 | |
| 655 | tlmm_suite.reg = tlmm_suite.base + tlmm_test_gpio * TLMM_REG_SIZE; |
| 656 | val = readl(addr: tlmm_suite.reg) & ~MSM_PULL_MASK; |
| 657 | tlmm_suite.low_val = val | MSM_PULL_DOWN; |
| 658 | tlmm_suite.high_val = val | MSM_PULL_UP; |
| 659 | |
| 660 | return 0; |
| 661 | |
| 662 | err_unmap: |
| 663 | iounmap(addr: tlmm_suite.base); |
| 664 | tlmm_suite.base = NULL; |
| 665 | return -EINVAL; |
| 666 | } |
| 667 | |
| 668 | static void tlmm_test_exit_suite(struct kunit_suite *suite) |
| 669 | { |
| 670 | irq_dispose_mapping(virq: tlmm_suite.irq); |
| 671 | iounmap(addr: tlmm_suite.base); |
| 672 | |
| 673 | tlmm_suite.base = NULL; |
| 674 | tlmm_suite.irq = -1; |
| 675 | } |
| 676 | |
| 677 | static struct kunit_case tlmm_test_cases[] = { |
| 678 | KUNIT_CASE(tlmm_test_silent_rising), |
| 679 | KUNIT_CASE(tlmm_test_silent_falling), |
| 680 | KUNIT_CASE(tlmm_test_silent_low), |
| 681 | KUNIT_CASE(tlmm_test_silent_high), |
| 682 | KUNIT_CASE(tlmm_test_rising), |
| 683 | KUNIT_CASE(tlmm_test_falling), |
| 684 | KUNIT_CASE(tlmm_test_high), |
| 685 | KUNIT_CASE(tlmm_test_low), |
| 686 | KUNIT_CASE(tlmm_test_rising_in_handler), |
| 687 | KUNIT_CASE(tlmm_test_falling_in_handler), |
| 688 | KUNIT_CASE(tlmm_test_thread_rising), |
| 689 | KUNIT_CASE(tlmm_test_thread_falling), |
| 690 | KUNIT_CASE(tlmm_test_thread_high), |
| 691 | KUNIT_CASE(tlmm_test_thread_low), |
| 692 | KUNIT_CASE(tlmm_test_thread_rising_in_handler), |
| 693 | KUNIT_CASE(tlmm_test_thread_falling_in_handler), |
| 694 | KUNIT_CASE(tlmm_test_rising_while_disabled), |
| 695 | {} |
| 696 | }; |
| 697 | |
| 698 | static struct kunit_suite tlmm_test_suite = { |
| 699 | .name = "tlmm-test" , |
| 700 | .init = tlmm_test_init, |
| 701 | .suite_init = tlmm_test_init_suite, |
| 702 | .suite_exit = tlmm_test_exit_suite, |
| 703 | .test_cases = tlmm_test_cases, |
| 704 | }; |
| 705 | |
| 706 | kunit_test_suites(&tlmm_test_suite); |
| 707 | |
| 708 | MODULE_DESCRIPTION("Qualcomm TLMM test" ); |
| 709 | MODULE_LICENSE("GPL" ); |
| 710 | |