diff mbox series

[RFC,v3,24/24] test/unit: add unit tests for RT500's clock controller

Message ID 20240827064529.1246786-25-tavip@google.com (mailing list archive)
State New
Headers show
Series NXP i.MX RT595 | expand

Commit Message

Octavian Purdila Aug. 27, 2024, 6:45 a.m. UTC 
Add test to exercise clocks set and clear, system PLL initialization,
audio PLL initialization, systick and ostimer clock source selection.

Signed-off-by: Octavian Purdila <tavip@google.com>
---
 tests/qtest/rt500-clkctl-test.c | 195 ++++++++++++++++++++++++++++++++
 tests/qtest/meson.build         |   1 +
 2 files changed, 196 insertions(+)
 create mode 100644 tests/qtest/rt500-clkctl-test.c
diff mbox series

Patch

diff --git a/tests/qtest/rt500-clkctl-test.c b/tests/qtest/rt500-clkctl-test.c
new file mode 100644
index 0000000000..d5b83d81da
--- /dev/null
+++ b/tests/qtest/rt500-clkctl-test.c
@@ -0,0 +1,195 @@ 
+/*
+ * Copyright (c) 2024 Google LLC
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qemu/main-loop.h"
+#include "exec/memory.h"
+#include "hw/clock.h"
+#include "hw/irq.h"
+#include "hw/qdev-clock.h"
+#include "hw/qdev-properties.h"
+
+#include "hw/misc/rt500_clkctl0.h"
+#include "hw/misc/rt500_clkctl1.h"
+#include "hw/misc/rt500_clk_freqs.h"
+#include "hw/arm/svd/rt500.h"
+#include "reg-utils.h"
+
+#define SYSCLK_HZ 200000000
+#define CLKCTL0_NAME "/machine/soc/clkctl0"
+#define CLKCTL1_NAME "/machine/soc/clkctl1"
+
+static void pscctl_test(gconstpointer user_data)
+{
+    /* rom controller clock should be enabled at reset */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, PSCCTL0, ROM_CTRLR_CLK) == 1);
+
+    /* DSP clk is disabled at reset */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, PSCCTL0, DSP_CLK) == 0);
+
+    /* check PSCTL_SET functionality */
+    REG32_WRITE_FIELD_NOUPDATE(RT500_CLKCTL0, PSCCTL0_SET, DSP_CLK, 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, PSCCTL0, DSP_CLK) == 1);
+
+    /* check PSCTL_CLR functionality */
+    REG32_WRITE_FIELD_NOUPDATE(RT500_CLKCTL0, PSCCTL0_CLR, DSP_CLK, 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, PSCCTL0, DSP_CLK) == 0);
+
+    /* FLEXIO clk is disabled at reset */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, PSCCTL0, FlexIO) == 0);
+
+    /* check PSCTL_SET functionality */
+    REG32_WRITE_FIELD_NOUPDATE(RT500_CLKCTL1, PSCCTL0_SET, FlexIO, 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, PSCCTL0, FlexIO) == 1);
+
+    /* check PSCTL_CLR functionality */
+    REG32_WRITE_FIELD_NOUPDATE(RT500_CLKCTL1, PSCCTL0_CLR, FlexIO, 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, PSCCTL0, FlexIO) == 0);
+}
+
+static void audiopll0pfd_test(gconstpointer user_data)
+{
+    /*  audio plls are gated at boot */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD3_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD2_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD1_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD0_CLKGATE) == 1);
+
+    /*  ,,, and clocks are not ready */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD3_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD2_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD1_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD0_CLKRDY) == 0);
+
+    /* ungate all plls and check that clocks are ready */
+    REG32_WRITE_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD3_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD2_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD1_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD0_CLKGATE, 0);
+
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD3_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD2_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD1_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL1, AUDIOPLL0PFD, PFD0_CLKRDY) == 1);
+}
+
+static void syspll0pfd_test(gconstpointer user_data)
+{
+    /*  system plls are gated at boot */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD3_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD2_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD1_CLKGATE) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD0_CLKGATE) == 1);
+
+    /*  ,,, and clocks are not ready */
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD3_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD2_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD1_CLKRDY) == 0);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD0_CLKRDY) == 0);
+
+    /* ungate all plls and check that clocks are ready */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD3_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD2_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD1_CLKGATE, 0);
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD0_CLKGATE, 0);
+
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD3_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD2_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD1_CLKRDY) == 1);
+    g_assert(REG32_READ_FIELD(RT500_CLKCTL0, SYSPLL0PFD, PFD0_CLKRDY) == 1);
+}
+
+static void systick_clk_test(gconstpointer user_data)
+{
+    /* systick is not running at reset */
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"), ==, 0);
+
+    /* select divout no divisor */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSTICKFCLKSEL, SEL,
+                      SYSTICKFCLKSEL_DIVOUT);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"),
+                     ==, SYSCLK_HZ);
+
+    /* change divisor to 2 */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSTICKFCLKDIV, DIV, 1);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"),
+                     ==, SYSCLK_HZ / 2);
+
+    /* select lpsoc */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSTICKFCLKSEL, SEL,
+                      SYSTICKFCLKSEL_LPOSC);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"),
+                     ==, LPOSC_CLK_HZ);
+
+    /* select lpsoc */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSTICKFCLKSEL, SEL,
+                      SYSTICKFCLKSEL_32KHZRTC);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"),
+                     ==, RTC32KHZ_CLK_HZ);
+
+    /* disable clock */
+    REG32_WRITE_FIELD(RT500_CLKCTL0, SYSTICKFCLKSEL, SEL,
+                      SYSTICKFCLKSEL_NONE);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL0_NAME, "systick_clk"),
+                     ==, 0);
+}
+
+static void ostimer_clk_test(gconstpointer user_data)
+{
+    /* systick is not running at reset */
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL1_NAME, "ostimer_clk"), ==, 0);
+
+    /* select lpsoc */
+    REG32_WRITE_FIELD(RT500_CLKCTL1, OSEVENTTFCLKSEL, SEL,
+                      OSEVENTTFCLKSEL_LPOSC);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL1_NAME, "ostimer_clk"), ==,
+                     LPOSC_CLK_HZ);
+
+    /* select 32khz RTC */
+    REG32_WRITE_FIELD(RT500_CLKCTL1, OSEVENTTFCLKSEL, SEL,
+                      OSEVENTTFCLKSEL_32KHZRTC);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL1_NAME, "ostimer_clk"), ==,
+                     RTC32KHZ_CLK_HZ);
+
+    /* select hclk */
+    REG32_WRITE_FIELD(RT500_CLKCTL1, OSEVENTTFCLKSEL, SEL,
+                      OSEVENTTFCLKSEL_HCLK);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL1_NAME, "ostimer_clk"), ==,
+                     SYSCLK_HZ);
+
+    /* disable clock */
+    REG32_WRITE_FIELD(RT500_CLKCTL1, OSEVENTTFCLKSEL, SEL,
+                      OSEVENTTFCLKSEL_NONE);
+    g_assert_cmpuint(dev_clock_out_get_hz(CLKCTL1_NAME, "ostimer_clk"), ==, 0);
+}
+
+int main(int argc, char **argv)
+{
+    int ret;
+
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_data_func("/rt500-clkctl/pscctl-test", NULL, pscctl_test);
+    qtest_add_data_func("/rt500-clkctl/syspll0pfd-test", NULL,
+                        syspll0pfd_test);
+    qtest_add_data_func("/rt500-clkctl/audiopll0pfd-test", NULL,
+                        audiopll0pfd_test);
+    g_test_add_data_func("/rt500-clkctl/systick-test", NULL,
+                         systick_clk_test);
+    g_test_add_data_func("/rt500-clkctl/ostimer-clk-test", NULL,
+                         ostimer_clk_test);
+
+    qtest_start("-M rt595-evk");
+    ret = g_test_run();
+    qtest_end();
+
+    return ret;
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 7df88edeab..fa463251d6 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -230,6 +230,7 @@  qtests_arm = \
   (config_all_devices.has_key('CONFIG_STM32L4X5_SOC') and
    config_all_devices.has_key('CONFIG_DM163')? ['dm163-test'] : []) + \
   (config_all_devices.has_key('CONFIG_FLEXCOMM') ? ['flexcomm-test', 'flexcomm-usart-test', 'flexcomm-i2c-test', 'flexcomm-spi-test'] : []) + \
+  (config_all_devices.has_key('CONFIG_RT500_CLKCTL') ? ['rt500-clkctl-test'] : []) + \
   ['arm-cpu-features',
    'boot-serial-test']