1 /* 2 * QTest testcase for the CMSDK APB dualtimer device 3 * 4 * Copyright (c) 2021 Linaro Limited 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * for more details. 15 */ 16 17 #include "qemu/osdep.h" 18 #include "libqtest-single.h" 19 20 /* IoTKit/ARMSSE dualtimer; driven at 25MHz in mps2-an385, so 40ns per tick */ 21 #define TIMER_BASE 0x40002000 22 23 #define TIMER1LOAD 0 24 #define TIMER1VALUE 4 25 #define TIMER1CONTROL 8 26 #define TIMER1INTCLR 0xc 27 #define TIMER1RIS 0x10 28 #define TIMER1MIS 0x14 29 #define TIMER1BGLOAD 0x18 30 31 #define TIMER2LOAD 0x20 32 #define TIMER2VALUE 0x24 33 #define TIMER2CONTROL 0x28 34 #define TIMER2INTCLR 0x2c 35 #define TIMER2RIS 0x30 36 #define TIMER2MIS 0x34 37 #define TIMER2BGLOAD 0x38 38 39 #define CTRL_ENABLE (1 << 7) 40 #define CTRL_PERIODIC (1 << 6) 41 #define CTRL_INTEN (1 << 5) 42 #define CTRL_PRESCALE_1 (0 << 2) 43 #define CTRL_PRESCALE_16 (1 << 2) 44 #define CTRL_PRESCALE_256 (2 << 2) 45 #define CTRL_32BIT (1 << 1) 46 #define CTRL_ONESHOT (1 << 0) 47 48 static void test_dualtimer(void) 49 { 50 g_assert_true(readl(TIMER_BASE + TIMER1RIS) == 0); 51 52 /* Start timer: will fire after 40000 ns */ 53 writel(TIMER_BASE + TIMER1LOAD, 1000); 54 /* enable in free-running, wrapping, interrupt mode */ 55 writel(TIMER_BASE + TIMER1CONTROL, CTRL_ENABLE | CTRL_INTEN); 56 57 /* Step to just past the 500th tick and check VALUE */ 58 clock_step(500 * 40 + 1); 59 g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 0); 60 g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 500); 61 62 /* Just past the 1000th tick: timer should have fired */ 63 clock_step(500 * 40); 64 g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 1); 65 g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 0); 66 67 /* 68 * We are in free-running wrapping 16-bit mode, so on the following 69 * tick VALUE should have wrapped round to 0xffff. 70 */ 71 clock_step(40); 72 g_assert_cmpuint(readl(TIMER_BASE + TIMER1VALUE), ==, 0xffff); 73 74 /* Check that any write to INTCLR clears interrupt */ 75 writel(TIMER_BASE + TIMER1INTCLR, 1); 76 g_assert_cmpuint(readl(TIMER_BASE + TIMER1RIS), ==, 0); 77 78 /* Turn off the timer */ 79 writel(TIMER_BASE + TIMER1CONTROL, 0); 80 } 81 82 static void test_prescale(void) 83 { 84 g_assert_true(readl(TIMER_BASE + TIMER2RIS) == 0); 85 86 /* Start timer: will fire after 40 * 256 * 1000 == 1024000 ns */ 87 writel(TIMER_BASE + TIMER2LOAD, 1000); 88 /* enable in periodic, wrapping, interrupt mode, prescale 256 */ 89 writel(TIMER_BASE + TIMER2CONTROL, 90 CTRL_ENABLE | CTRL_INTEN | CTRL_PERIODIC | CTRL_PRESCALE_256); 91 92 /* Step to just past the 500th tick and check VALUE */ 93 clock_step(40 * 256 * 501); 94 g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 0); 95 g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 500); 96 97 /* Just past the 1000th tick: timer should have fired */ 98 clock_step(40 * 256 * 500); 99 g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 1); 100 g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 0); 101 102 /* In periodic mode the tick VALUE now reloads */ 103 clock_step(40 * 256); 104 g_assert_cmpuint(readl(TIMER_BASE + TIMER2VALUE), ==, 1000); 105 106 /* Check that any write to INTCLR clears interrupt */ 107 writel(TIMER_BASE + TIMER2INTCLR, 1); 108 g_assert_cmpuint(readl(TIMER_BASE + TIMER2RIS), ==, 0); 109 110 /* Turn off the timer */ 111 writel(TIMER_BASE + TIMER2CONTROL, 0); 112 } 113 114 int main(int argc, char **argv) 115 { 116 int r; 117 118 g_test_init(&argc, &argv, NULL); 119 120 qtest_start("-machine mps2-an385"); 121 122 qtest_add_func("/cmsdk-apb-dualtimer/dualtimer", test_dualtimer); 123 qtest_add_func("/cmsdk-apb-dualtimer/prescale", test_prescale); 124 125 r = g_test_run(); 126 127 qtest_end(); 128 129 return r; 130 } 131