[23/25] tests/qtest: add tests for flexcomm spi

Commit Message

Octavian Purdila Sept. 18, 2024, 7:22 p.m. UTC

From: Sebastian Ene <[e-mail]>

Add master and loopback tests for flexcomm spi.

Signed-off-by: Sebastian Ene <[e-mail]>
[tavip: add master mode test, convert to qtest]
Signed-off-by: Octavian Purdila <[e-mail]>
---
 tests/qtest/flexcomm-spi-test.c | 145 ++++++++++++++++++++++++++++++++
 tests/qtest/meson.build         |   2 +-
 2 files changed, 146 insertions(+), 1 deletion(-)
 create mode 100644 tests/qtest/flexcomm-spi-test.c

Patch

diff --git a/tests/qtest/flexcomm-spi-test.c b/tests/qtest/flexcomm-spi-test.c
new file mode 100644
index 0000000000..4658835b8f
--- /dev/null
+++ b/tests/qtest/flexcomm-spi-test.c
@@ -0,0 +1,145 @@ 
+/*
+ * 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/config-file.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "qemu/sockets.h"
+#include "sysemu/sysemu.h"
+#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "exec/memory.h"
+#include "hw/irq.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-core.h"
+
+#include "hw/misc/flexcomm.h"
+#include "hw/arm/svd/flexcomm_spi.h"
+#include "hw/arm/svd/rt500.h"
+#include "reg-utils.h"
+
+/* The number of words sent on the SPI in loopback mode. */
+#define SEQ_LOOPBACK_MODE   (8)
+
+/* This value is used to set the cycle counter for the spi tester */
+#define SPI_TESTER_CONFIG (0x10)
+
+#define FLEXCOMM_BASE RT500_FLEXCOMM0_BASE
+#define FLEXCOMM_SPI_BASE RT500_FLEXCOMM0_BASE
+#define DEVICE_NAME "/machine/soc/flexcomm0"
+
+static void configure_spi(bool master, bool is_loopback_mode)
+{
+    uint32_t tmp;
+
+    /* Select and lock SPI */
+    tmp = FLEXCOMM_PERSEL_SPI;
+    FIELD_DP32(tmp, FLEXCOMM_PSELID, LOCK, 1);
+    REG32_WRITE(FLEXCOMM, PSELID, tmp);
+
+    /* Disable the FIFO */
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, ENABLE, 0);
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, FIFOCFG, ENABLETX, 0);
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, FIFOCFG, ENABLERX, 0);
+
+    if (is_loopback_mode) {
+        /* Set up SPI interface - loop mode, master mode */
+        REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, LOOP, 1);
+        g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, CFG, LOOP) == 1);
+    }
+
+    if (master) {
+        REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, MASTER, 1);
+        g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, CFG, MASTER) == 1);
+    } else {
+        REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, MASTER, 0);
+        g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, CFG, MASTER) == 0);
+    }
+
+    /* Enable the FIFO */
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, FIFOCFG, ENABLETX, 1);
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, FIFOCFG, ENABLERX, 1);
+
+    /* Enable the SPI */
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, ENABLE, 1);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, CFG, ENABLE) == 1);
+}
+
+/* The SPI controller running in master mode can run in loopback mode for */
+/* internal testing. Transmit and receive lines are connected together. */
+static void loopback_test(gconstpointer user_data)
+{
+    configure_spi(true, true);
+
+    /* Write a sequence */
+    for (int i = 0; i < SEQ_LOOPBACK_MODE; i++) {
+        REG32_WRITE(FLEXCOMM_SPI, FIFOWR, i);
+    }
+
+    /* Read the sequence back */
+    for (int i = 0; i < SEQ_LOOPBACK_MODE; i++) {
+        g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFORD, RXDATA) == i);
+    }
+}
+
+static void master_test(gconstpointer user_data)
+{
+    uint32_t tmp;
+
+    configure_spi(true, false);
+
+    REG32_WRITE_FIELD(FLEXCOMM_SPI, CFG, LSBF, 1);
+
+    /* single 16bit word transfer */
+
+    tmp = FIELD_DP32(0x1122, FLEXCOMM_SPI_FIFOWR, EOT, 1);
+    tmp = FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, TXSSEL0_N, 1);
+    tmp = FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, LEN, 0xF);
+    REG32_WRITE(FLEXCOMM_SPI, FIFOWR, tmp);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFOSTAT, RXNOTEMPTY) == 1);
+    g_assert_cmpuint(REG32_READ_FIELD(FLEXCOMM_SPI, FIFORD, RXDATA),
+                     ==, 0x1122);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFOSTAT, RXNOTEMPTY) == 0);
+
+    /* multi word 8 bits transfer */
+
+    tmp = FIELD_DP32(0x11, FLEXCOMM_SPI_FIFOWR, TXSSEL0_N, 1);
+    tmp = FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, LEN, 0x7);
+    REG32_WRITE(FLEXCOMM_SPI, FIFOWR, tmp);
+    tmp = 0x22;
+    FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, EOT, 1);
+    FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, TXSSEL0_N, 1);
+    FIELD_DP32(tmp, FLEXCOMM_SPI_FIFOWR, LEN, 0x7);
+    REG32_WRITE(FLEXCOMM_SPI, FIFOWR, tmp);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFOSTAT, RXNOTEMPTY) == 1);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFORD, RXDATA) == 0x11);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFOSTAT, RXNOTEMPTY) == 1);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFORD, RXDATA) == 0x22);
+    g_assert(REG32_READ_FIELD(FLEXCOMM_SPI, FIFOSTAT, RXNOTEMPTY) == 0);
+}
+
+int main(int argc, char **argv)
+{
+    int ret;
+
+    module_call_init(MODULE_INIT_QOM);
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_data_func("/flexcomm-spi/loopack", NULL, loopback_test);
+    qtest_add_data_func("/flexcomm-spi/master", NULL, master_test);
+
+    qtest_start("-M rt595-evk -device spi-tester,bus=/flexcomm0-spi");
+    ret = g_test_run();
+    qtest_end();
+
+    return ret;
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 74fef28551..2cb0fa08c0 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -231,7 +231,7 @@  qtests_arm = \
   (config_all_devices.has_key('CONFIG_FSI_APB2OPB_ASPEED') ? ['aspeed_fsi-test'] : []) + \
   (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'] : []) + \
+  (config_all_devices.has_key('CONFIG_FLEXCOMM') ? ['flexcomm-test', 'flexcomm-usart-test', 'flexcomm-i2c-test', 'flexcomm-spi-test'] : []) + \
   ['arm-cpu-features',
    'boot-serial-test']