From: Rayhan Faizel <rayhan.faizel@gmail.com>
Simple testcase for validating proper operation of read and write for all
three BSC controllers.
Signed-off-by: Rayhan Faizel <rayhan.faizel@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240224191038.2409945-4-rayhan.faizel@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
tests/qtest/bcm2835-i2c-test.c | 115 +++++++++++++++++++++++++++++++++
tests/qtest/meson.build | 2 +-
2 files changed, 116 insertions(+), 1 deletion(-)
create mode 100644 tests/qtest/bcm2835-i2c-test.c
diff --git a/tests/qtest/bcm2835-i2c-test.c b/tests/qtest/bcm2835-i2c-test.c
new file mode 100644
index 00000000000..513ecce61dc
--- /dev/null
+++ b/tests/qtest/bcm2835-i2c-test.c
@@ -0,0 +1,115 @@
+/*
+ * QTest testcase for Broadcom Serial Controller (BSC)
+ *
+ * Copyright (c) 2024 Rayhan Faizel <rayhan.faizel@gmail.com>
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+
+#include "hw/i2c/bcm2835_i2c.h"
+#include "hw/sensor/tmp105_regs.h"
+
+static const uint32_t bsc_base_addrs[] = {
+ 0x3f205000, /* I2C0 */
+ 0x3f804000, /* I2C1 */
+ 0x3f805000, /* I2C2 */
+};
+
+static void bcm2835_i2c_init_transfer(uint32_t base_addr, bool read)
+{
+ /* read flag is bit 0 so we can write it directly */
+ int interrupt = read ? BCM2835_I2C_C_INTR : BCM2835_I2C_C_INTT;
+
+ writel(base_addr + BCM2835_I2C_C,
+ BCM2835_I2C_C_I2CEN | BCM2835_I2C_C_INTD |
+ BCM2835_I2C_C_ST | BCM2835_I2C_C_CLEAR | interrupt | read);
+}
+
+static void test_i2c_read_write(gconstpointer data)
+{
+ uint32_t i2cdata;
+ intptr_t index = (intptr_t) data;
+ uint32_t base_addr = bsc_base_addrs[index];
+
+ /* Write to TMP105 register */
+ writel(base_addr + BCM2835_I2C_A, 0x50);
+ writel(base_addr + BCM2835_I2C_DLEN, 3);
+
+ bcm2835_i2c_init_transfer(base_addr, 0);
+
+ writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
+ writel(base_addr + BCM2835_I2C_FIFO, 0xde);
+ writel(base_addr + BCM2835_I2C_FIFO, 0xad);
+
+ /* Clear flags */
+ writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
+ BCM2835_I2C_S_CLKT);
+
+ /* Read from TMP105 register */
+ writel(base_addr + BCM2835_I2C_A, 0x50);
+ writel(base_addr + BCM2835_I2C_DLEN, 1);
+
+ bcm2835_i2c_init_transfer(base_addr, 0);
+
+ writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
+
+ writel(base_addr + BCM2835_I2C_DLEN, 2);
+ bcm2835_i2c_init_transfer(base_addr, 1);
+
+ i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
+ g_assert_cmpint(i2cdata, ==, 0xde);
+
+ i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
+ g_assert_cmpint(i2cdata, ==, 0xad);
+
+ /* Clear flags */
+ writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
+ BCM2835_I2C_S_CLKT);
+
+}
+
+int main(int argc, char **argv)
+{
+ int ret;
+ int i;
+
+ g_test_init(&argc, &argv, NULL);
+
+ for (i = 0; i < 3; i++) {
+ g_autofree char *test_name =
+ g_strdup_printf("/bcm2835/bcm2835-i2c%d/read_write", i);
+ qtest_add_data_func(test_name, (void *)(intptr_t) i,
+ test_i2c_read_write);
+ }
+
+ /* Run I2C tests with TMP105 slaves on all three buses */
+ qtest_start("-M raspi3b "
+ "-device tmp105,address=0x50,bus=i2c-bus.0 "
+ "-device tmp105,address=0x50,bus=i2c-bus.1 "
+ "-device tmp105,address=0x50,bus=i2c-bus.2");
+ ret = g_test_run();
+ qtest_end();
+
+ return ret;
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 6ea77893f50..bdc8bba7a98 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -230,7 +230,7 @@ qtests_aarch64 = \
['tpm-tis-device-test', 'tpm-tis-device-swtpm-test'] : []) + \
(config_all_devices.has_key('CONFIG_XLNX_ZYNQMP_ARM') ? ['xlnx-can-test', 'fuzz-xlnx-dp-test'] : []) + \
(config_all_devices.has_key('CONFIG_XLNX_VERSAL') ? ['xlnx-canfd-test', 'xlnx-versal-trng-test'] : []) + \
- (config_all_devices.has_key('CONFIG_RASPI') ? ['bcm2835-dma-test'] : []) + \
+ (config_all_devices.has_key('CONFIG_RASPI') ? ['bcm2835-dma-test', 'bcm2835-i2c-test'] : []) + \
(config_all_accel.has_key('CONFIG_TCG') and \
config_all_devices.has_key('CONFIG_TPM_TIS_I2C') ? ['tpm-tis-i2c-test'] : []) + \
['arm-cpu-features',
--
2.34.1