From nobody Mon Feb 9 14:37:59 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1547113542785391.05545651437296; Thu, 10 Jan 2019 01:45:42 -0800 (PST) Received: from localhost ([127.0.0.1]:42250 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ghWuD-0003ZF-OS for importer@patchew.org; Thu, 10 Jan 2019 04:45:41 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40354) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ghWpK-0000IW-BB for qemu-devel@nongnu.org; Thu, 10 Jan 2019 04:40:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ghWpJ-0007aY-9w for qemu-devel@nongnu.org; Thu, 10 Jan 2019 04:40:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34512) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ghWpF-0007Ug-Pt; Thu, 10 Jan 2019 04:40:33 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6C85F80F95; Thu, 10 Jan 2019 09:40:32 +0000 (UTC) Received: from localhost (ovpn-116-67.ams2.redhat.com [10.36.116.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id AF5CF17CFB; Thu, 10 Jan 2019 09:40:29 +0000 (UTC) From: Stefan Hajnoczi To: Date: Thu, 10 Jan 2019 09:40:20 +0000 Message-Id: <20190110094020.18354-3-stefanha@redhat.com> In-Reply-To: <20190110094020.18354-1-stefanha@redhat.com> References: <20190110094020.18354-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 10 Jan 2019 09:40:32 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 2/2] 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: , Cc: Laurent Vivier , Peter Maydell , jim@groklearning.com, contrib@steffen-goertz.de, Thomas Huth , qemu-arm@nongnu.org, Joel Stanley , Stefan Hajnoczi , Paolo Bonzini , jusual@mail.ru Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" This test verifies that we read back the expected I2C WHO_AM_I register values for the accelerometer/magnetometer. Signed-off-by: Stefan Hajnoczi --- tests/microbit-test.c | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/tests/microbit-test.c b/tests/microbit-test.c index 0c125535f6..dcdc0cd41a 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