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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id b18sm97910681wrw.83.2019.01.28.10.10.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 28 Jan 2019 10:10:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=HVtry8pW5gd4EFWPYzQSKt6Lm5EYVqOWAnwCAHgbRU8=; b=Kjz385sA+AFbqrQFTwI6b4y5jpg4SrUQatXpAwap2twCR7COOTwOhtqdnuj5HRmgqS R2r+YYfhGnV84AK3fPVHkxfJTJt6K2zC6oogHpFTIpPNNRwA56S6f07axXCVPIVa+l/l MnNCe7l2MGLb7OV2ygjdBYiahiHSIA6i/fJcU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HVtry8pW5gd4EFWPYzQSKt6Lm5EYVqOWAnwCAHgbRU8=; b=bBS0N4+bRKEvYl+jv+ynouTT91yuJ180BSgJQCFDQ1jDpvuk8Tmsn6etQX9+ut+qiw s9OU4WHQ/5bj77ssN5GxbWiUb+7oz4Wui9RPsytKDAbIki5Q4qWYfAhv0Gi2Ye/n7/Lq K7Ss+EDxgV8kzr+k8JMJLNhaP3TJrnYL+bNRYdM5BAzvDMw8HwmZkmMgC9obVZXj3daB Yr67PtDLeEc0dTWZhANgoZi6+vfyfnqVoRlAzUBeAy7Mgmx1l5bxsEdB98AD87cEoig1 cteNl3u+rx1sY6rwirYCY9soegbuLV/vuDMMk/vd0bKY5c+480Pbleh74EsXHyF2dVu0 F/aA== X-Gm-Message-State: AJcUukeKbVUtE3p92tPGVd7K+Agtr2T/d5FCXTIHlzfnwY4Jx/gAyxOq Qs5iYuc0LzcrKThDQOkLG0nRbrvsBh/QpA== X-Google-Smtp-Source: ALg8bN7kNiGK1Lq6L+Z6lHeJLzO2OSV8oupYZHSR1WBztsOefgV0xpYSblFMEAcNP68/TaLKMtCnmg== X-Received: by 2002:a1c:c543:: with SMTP id v64mr17240613wmf.123.1548699056286; Mon, 28 Jan 2019 10:10:56 -0800 (PST) From: Peter Maydell To: qemu-devel@nongnu.org Date: Mon, 28 Jan 2019 18:10:26 +0000 Message-Id: <20190128181047.20781-6-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190128181047.20781-1-peter.maydell@linaro.org> References: <20190128181047.20781-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::329 Subject: [Qemu-devel] [PULL 05/26] tests/microbit-test: add TWI stub device test X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Stefan Hajnoczi This test verifies that we read back the expected I2C WHO_AM_I register values for the accelerometer/magnetometer. Signed-off-by: Stefan Hajnoczi Message-id: 20190110094020.18354-3-stefanha@redhat.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- tests/microbit-test.c | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/tests/microbit-test.c b/tests/microbit-test.c index 0c125535f64..dcdc0cd41a5 100644 --- a/tests/microbit-test.c +++ b/tests/microbit-test.c @@ -21,6 +21,49 @@ #include "hw/arm/nrf51.h" #include "hw/gpio/nrf51_gpio.h" #include "hw/timer/nrf51_timer.h" +#include "hw/i2c/microbit_i2c.h" + +/* Read a byte from I2C device at @addr from register @reg */ +static uint32_t i2c_read_byte(uint32_t addr, uint32_t reg) +{ + uint32_t val; + + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ADDRESS, addr); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STARTTX, 1); + writel(NRF51_TWI_BASE + NRF51_TWI_REG_TXD, reg); + val =3D readl(NRF51_TWI_BASE + NRF51_TWI_EVENT_TXDSENT); + g_assert_cmpuint(val, =3D=3D, 1); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STOP, 1); + + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STARTRX, 1); + val =3D readl(NRF51_TWI_BASE + NRF51_TWI_EVENT_RXDREADY); + g_assert_cmpuint(val, =3D=3D, 1); + val =3D readl(NRF51_TWI_BASE + NRF51_TWI_REG_RXD); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STOP, 1); + + return val; +} + +static void test_microbit_i2c(void) +{ + uint32_t val; + + /* We don't program pins/irqs but at least enable the device */ + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ENABLE, 5); + + /* MMA8653 magnetometer detection */ + val =3D i2c_read_byte(0x3A, 0x0D); + g_assert_cmpuint(val, =3D=3D, 0x5A); + + val =3D i2c_read_byte(0x3A, 0x0D); + g_assert_cmpuint(val, =3D=3D, 0x5A); + + /* LSM303 accelerometer detection */ + val =3D i2c_read_byte(0x3C, 0x4F); + g_assert_cmpuint(val, =3D=3D, 0x40); + + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ENABLE, 0); +} =20 static void test_nrf51_gpio(void) { @@ -247,6 +290,7 @@ int main(int argc, char **argv) =20 qtest_add_func("/microbit/nrf51/gpio", test_nrf51_gpio); qtest_add_func("/microbit/nrf51/timer", test_nrf51_timer); + qtest_add_func("/microbit/microbit/i2c", test_microbit_i2c); =20 ret =3D g_test_run(); =20 --=20 2.20.1