0820e097fa
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>
116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
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* QTest testcase for Broadcom Serial Controller (BSC)
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*
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* Copyright (c) 2024 Rayhan Faizel <rayhan.faizel@gmail.com>
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "libqtest-single.h"
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#include "hw/i2c/bcm2835_i2c.h"
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#include "hw/sensor/tmp105_regs.h"
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static const uint32_t bsc_base_addrs[] = {
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0x3f205000, /* I2C0 */
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0x3f804000, /* I2C1 */
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0x3f805000, /* I2C2 */
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};
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static void bcm2835_i2c_init_transfer(uint32_t base_addr, bool read)
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{
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/* read flag is bit 0 so we can write it directly */
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int interrupt = read ? BCM2835_I2C_C_INTR : BCM2835_I2C_C_INTT;
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writel(base_addr + BCM2835_I2C_C,
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BCM2835_I2C_C_I2CEN | BCM2835_I2C_C_INTD |
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BCM2835_I2C_C_ST | BCM2835_I2C_C_CLEAR | interrupt | read);
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}
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static void test_i2c_read_write(gconstpointer data)
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{
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uint32_t i2cdata;
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intptr_t index = (intptr_t) data;
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uint32_t base_addr = bsc_base_addrs[index];
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/* Write to TMP105 register */
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writel(base_addr + BCM2835_I2C_A, 0x50);
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writel(base_addr + BCM2835_I2C_DLEN, 3);
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bcm2835_i2c_init_transfer(base_addr, 0);
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writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
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writel(base_addr + BCM2835_I2C_FIFO, 0xde);
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writel(base_addr + BCM2835_I2C_FIFO, 0xad);
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/* Clear flags */
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writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
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BCM2835_I2C_S_CLKT);
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/* Read from TMP105 register */
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writel(base_addr + BCM2835_I2C_A, 0x50);
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writel(base_addr + BCM2835_I2C_DLEN, 1);
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bcm2835_i2c_init_transfer(base_addr, 0);
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writel(base_addr + BCM2835_I2C_FIFO, TMP105_REG_T_HIGH);
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writel(base_addr + BCM2835_I2C_DLEN, 2);
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bcm2835_i2c_init_transfer(base_addr, 1);
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i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
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g_assert_cmpint(i2cdata, ==, 0xde);
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i2cdata = readl(base_addr + BCM2835_I2C_FIFO);
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g_assert_cmpint(i2cdata, ==, 0xad);
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/* Clear flags */
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writel(base_addr + BCM2835_I2C_S, BCM2835_I2C_S_DONE | BCM2835_I2C_S_ERR |
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BCM2835_I2C_S_CLKT);
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}
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int main(int argc, char **argv)
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{
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int ret;
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int i;
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g_test_init(&argc, &argv, NULL);
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for (i = 0; i < 3; i++) {
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g_autofree char *test_name =
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g_strdup_printf("/bcm2835/bcm2835-i2c%d/read_write", i);
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qtest_add_data_func(test_name, (void *)(intptr_t) i,
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test_i2c_read_write);
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}
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/* Run I2C tests with TMP105 slaves on all three buses */
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qtest_start("-M raspi3b "
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"-device tmp105,address=0x50,bus=i2c-bus.0 "
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"-device tmp105,address=0x50,bus=i2c-bus.1 "
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"-device tmp105,address=0x50,bus=i2c-bus.2");
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ret = g_test_run();
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qtest_end();
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return ret;
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}
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