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/*
* 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;
}
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