From 7f3986278b0bc214e83111ea55c8d12bac79c4fa Mon Sep 17 00:00:00 2001 From: Jean-Christophe Dubois Date: Mon, 7 Sep 2015 10:39:31 +0100 Subject: [PATCH] i.MX: Add qtest support for I2C device emulator. This is using a ds1338 RTC chip on the I2C bus. This RTC chip is not present on the real 3DS PDK board. Signed-off-by: Jean-Christophe Dubois Acked-by: Peter Crosthwaite Message-id: 05601683a2a95c881cbc9f22651a044d969bd0ae.1441057361.git.jcd@tribudubois.net Signed-off-by: Peter Maydell --- include/hw/arm/fsl-imx31.h | 1 + tests/Makefile | 3 + tests/ds1338-test.c | 78 +++++++++++++++++ tests/libqos/i2c-imx.c | 209 +++++++++++++++++++++++++++++++++++++++++++++ tests/libqos/i2c.h | 3 + 5 files changed, 294 insertions(+) create mode 100644 tests/ds1338-test.c create mode 100644 tests/libqos/i2c-imx.c diff --git a/include/hw/arm/fsl-imx31.h b/include/hw/arm/fsl-imx31.h index 09508e3960..128006fd75 100644 --- a/include/hw/arm/fsl-imx31.h +++ b/include/hw/arm/fsl-imx31.h @@ -23,6 +23,7 @@ #include "hw/char/imx_serial.h" #include "hw/timer/imx_gpt.h" #include "hw/timer/imx_epit.h" +#include "hw/i2c/imx_i2c.h" #include "exec/memory.h" #define TYPE_FSL_IMX31 "fsl,imx31" diff --git a/tests/Makefile b/tests/Makefile index b128e288e4..34c6136db3 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -201,6 +201,7 @@ check-qtest-sparc64-y = tests/endianness-test$(EXESUF) gcov-files-sparc-y += hw/timer/m48t59.c gcov-files-sparc64-y += hw/timer/m48t59.c check-qtest-arm-y = tests/tmp105-test$(EXESUF) +check-qtest-arm-y = tests/ds1338-test$(EXESUF) gcov-files-arm-y += hw/misc/tmp105.c check-qtest-arm-y += tests/virtio-blk-test$(EXESUF) gcov-files-arm-y += arm-softmmu/hw/block/virtio-blk.c @@ -358,6 +359,7 @@ libqos-pc-obj-y = $(libqos-obj-y) tests/libqos/pci-pc.o libqos-pc-obj-y += tests/libqos/malloc-pc.o tests/libqos/libqos-pc.o libqos-pc-obj-y += tests/libqos/ahci.o libqos-omap-obj-y = $(libqos-obj-y) tests/libqos/i2c-omap.o +libqos-imx-obj-y = $(libqos-obj-y) tests/libqos/i2c-imx.o libqos-usb-obj-y = $(libqos-pc-obj-y) tests/libqos/usb.o libqos-virtio-obj-y = $(libqos-pc-obj-y) tests/libqos/virtio.o tests/libqos/virtio-pci.o tests/libqos/virtio-mmio.o tests/libqos/malloc-generic.o @@ -372,6 +374,7 @@ tests/hd-geo-test$(EXESUF): tests/hd-geo-test.o tests/boot-order-test$(EXESUF): tests/boot-order-test.o $(libqos-obj-y) tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o $(libqos-obj-y) tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y) +tests/ds1338-test$(EXESUF): tests/ds1338-test.o $(libqos-imx-obj-y) tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y) tests/q35-test$(EXESUF): tests/q35-test.o $(libqos-pc-obj-y) tests/fw_cfg-test$(EXESUF): tests/fw_cfg-test.o $(libqos-pc-obj-y) diff --git a/tests/ds1338-test.c b/tests/ds1338-test.c new file mode 100644 index 0000000000..a7fb415353 --- /dev/null +++ b/tests/ds1338-test.c @@ -0,0 +1,78 @@ +/* + * QTest testcase for the DS1338 RTC + * + * Copyright (c) 2013 Jean-Christophe Dubois + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#include "libqtest.h" +#include "libqos/i2c.h" + +#include + +#define IMX25_I2C_0_BASE 0x43F80000 + +#define DS1338_ADDR 0x68 + +static I2CAdapter *i2c; +static uint8_t addr; + +static inline uint8_t bcd2bin(uint8_t x) +{ + return ((x) & 0x0f) + ((x) >> 4) * 10; +} + +static void send_and_receive(void) +{ + uint8_t cmd[1]; + uint8_t resp[7]; + time_t now = time(NULL); + struct tm *tm_ptr = gmtime(&now); + + /* reset the index in the RTC memory */ + cmd[0] = 0; + i2c_send(i2c, addr, cmd, 1); + + /* retrieve the date */ + i2c_recv(i2c, addr, resp, 7); + + /* check retrieved time againt local time */ + g_assert_cmpuint(bcd2bin(resp[4]), == , tm_ptr->tm_mday); + g_assert_cmpuint(bcd2bin(resp[5]), == , 1 + tm_ptr->tm_mon); + g_assert_cmpuint(2000 + bcd2bin(resp[6]), == , 1900 + tm_ptr->tm_year); +} + +int main(int argc, char **argv) +{ + QTestState *s = NULL; + int ret; + + g_test_init(&argc, &argv, NULL); + + s = qtest_start("-display none -machine imx25_pdk"); + i2c = imx_i2c_create(IMX25_I2C_0_BASE); + addr = DS1338_ADDR; + + qtest_add_func("/ds1338/tx-rx", send_and_receive); + + ret = g_test_run(); + + if (s) { + qtest_quit(s); + } + g_free(i2c); + + return ret; +} diff --git a/tests/libqos/i2c-imx.c b/tests/libqos/i2c-imx.c new file mode 100644 index 0000000000..b5cef66b94 --- /dev/null +++ b/tests/libqos/i2c-imx.c @@ -0,0 +1,209 @@ +/* + * QTest i.MX I2C driver + * + * Copyright (c) 2013 Jean-Christophe Dubois + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#include "libqos/i2c.h" + +#include +#include + +#include "qemu/osdep.h" +#include "libqtest.h" + +#include "hw/i2c/imx_i2c.h" + +enum IMXI2CDirection { + IMX_I2C_READ, + IMX_I2C_WRITE, +}; + +typedef struct IMXI2C { + I2CAdapter parent; + + uint64_t addr; +} IMXI2C; + + +static void imx_i2c_set_slave_addr(IMXI2C *s, uint8_t addr, + enum IMXI2CDirection direction) +{ + writeb(s->addr + I2DR_ADDR, (addr << 1) | + (direction == IMX_I2C_READ ? 1 : 0)); +} + +static void imx_i2c_send(I2CAdapter *i2c, uint8_t addr, + const uint8_t *buf, uint16_t len) +{ + IMXI2C *s = (IMXI2C *)i2c; + uint8_t data; + uint8_t status; + uint16_t size = 0; + + if (!len) { + return; + } + + /* set the bus for write */ + data = I2CR_IEN | + I2CR_IIEN | + I2CR_MSTA | + I2CR_MTX | + I2CR_TXAK; + + writeb(s->addr + I2CR_ADDR, data); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) != 0); + + /* set the slave address */ + imx_i2c_set_slave_addr(s, addr, IMX_I2C_WRITE); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) != 0); + g_assert((status & I2SR_RXAK) == 0); + + /* ack the interrupt */ + writeb(s->addr + I2SR_ADDR, 0); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) == 0); + + while (size < len) { + /* check we are still busy */ + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) != 0); + + /* write the data */ + writeb(s->addr + I2DR_ADDR, buf[size]); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) != 0); + g_assert((status & I2SR_RXAK) == 0); + + /* ack the interrupt */ + writeb(s->addr + I2SR_ADDR, 0); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) == 0); + + size++; + } + + /* release the bus */ + data &= ~(I2CR_MSTA | I2CR_MTX); + writeb(s->addr + I2CR_ADDR, data); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) == 0); +} + +static void imx_i2c_recv(I2CAdapter *i2c, uint8_t addr, + uint8_t *buf, uint16_t len) +{ + IMXI2C *s = (IMXI2C *)i2c; + uint8_t data; + uint8_t status; + uint16_t size = 0; + + if (!len) { + return; + } + + /* set the bus for write */ + data = I2CR_IEN | + I2CR_IIEN | + I2CR_MSTA | + I2CR_MTX | + I2CR_TXAK; + + writeb(s->addr + I2CR_ADDR, data); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) != 0); + + /* set the slave address */ + imx_i2c_set_slave_addr(s, addr, IMX_I2C_READ); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) != 0); + g_assert((status & I2SR_RXAK) == 0); + + /* ack the interrupt */ + writeb(s->addr + I2SR_ADDR, 0); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) == 0); + + /* set the bus for read */ + data &= ~I2CR_MTX; + /* if only one byte don't ack */ + if (len != 1) { + data &= ~I2CR_TXAK; + } + writeb(s->addr + I2CR_ADDR, data); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) != 0); + + /* dummy read */ + readb(s->addr + I2DR_ADDR); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) != 0); + + /* ack the interrupt */ + writeb(s->addr + I2SR_ADDR, 0); + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) == 0); + + while (size < len) { + /* check we are still busy */ + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) != 0); + + if (size == (len - 1)) { + /* stop the read transaction */ + data &= ~(I2CR_MSTA | I2CR_MTX); + } else { + /* ack the data read */ + data |= I2CR_TXAK; + } + writeb(s->addr + I2CR_ADDR, data); + + /* read the data */ + buf[size] = readb(s->addr + I2DR_ADDR); + + if (size != (len - 1)) { + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) != 0); + + /* ack the interrupt */ + writeb(s->addr + I2SR_ADDR, 0); + } + + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IIF) == 0); + + size++; + } + + status = readb(s->addr + I2SR_ADDR); + g_assert((status & I2SR_IBB) == 0); +} + +I2CAdapter *imx_i2c_create(uint64_t addr) +{ + IMXI2C *s = g_malloc0(sizeof(*s)); + I2CAdapter *i2c = (I2CAdapter *)s; + + s->addr = addr; + + i2c->send = imx_i2c_send; + i2c->recv = imx_i2c_recv; + + return i2c; +} diff --git a/tests/libqos/i2c.h b/tests/libqos/i2c.h index 1ce9af4053..c21f1dcbd5 100644 --- a/tests/libqos/i2c.h +++ b/tests/libqos/i2c.h @@ -27,4 +27,7 @@ void i2c_recv(I2CAdapter *i2c, uint8_t addr, /* libi2c-omap.c */ I2CAdapter *omap_i2c_create(uint64_t addr); +/* libi2c-imx.c */ +I2CAdapter *imx_i2c_create(uint64_t addr); + #endif -- 2.11.4.GIT