Commit 7f398627 authored by Jean-Christophe Dubois's avatar Jean-Christophe Dubois Committed by Peter Maydell
Browse files

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: default avatarJean-Christophe Dubois <jcd@tribudubois.net>
Acked-by: default avatarPeter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: 05601683a2a95c881cbc9f22651a044d969bd0ae.1441057361.git.jcd@tribudubois.net
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 65f57c43

include/hw/arm/fsl-imx31.h

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Original line number Diff line number Diff line
@@ -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"

tests/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -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)

tests/ds1338-test.c

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+78 −0
Original line number Diff line number Diff line 
/*

 * 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 <http://www.gnu.org/licenses/>.

 */



#include "libqtest.h"

#include "libqos/i2c.h"



#include <glib.h>



#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;

}

tests/libqos/i2c-imx.c

0 → 100644
+209 −0
Original line number Diff line number Diff line 
/*

 * 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 <http://www.gnu.org/licenses/>.

 */



#include "libqos/i2c.h"



#include <glib.h>

#include <string.h>



#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;

}

tests/libqos/i2c.h

+3 −0
Original line number Diff line number Diff line
@@ -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