From nobody Tue Nov 4 18:29:24 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1530598247007156.06877049745924; Mon, 2 Jul 2018 23:10:47 -0700 (PDT) Received: from localhost ([::1]:37996 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1faEWU-00044t-8z for importer@patchew.org; Tue, 03 Jul 2018 02:10:46 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39900) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1faEKY-0002sv-HE for qemu-devel@nongnu.org; Tue, 03 Jul 2018 01:58:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1faEKW-00072f-7X for qemu-devel@nongnu.org; Tue, 03 Jul 2018 01:58:26 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:35507) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1faEKV-0006yO-CA; Tue, 03 Jul 2018 01:58:24 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 41KYMC32slz9sBt; Tue, 3 Jul 2018 15:58:14 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1530597495; bh=nith9nKuXdbyko6bChCbi3C3URiTtG0WAv5vsboNjHk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cnvuah31JERQ+29S+Ng5SdL+Stuc4kTKQKT8qlUUf3TaoKRbqfDTpbLYaWO0j24rG 1iMCwcv1B9Nhtb+d1X9FyCBeiJ1ucq87r0KlQ2N3SevG/dZZEyfjTJKbfDeuOoXsCk /gFW0OXQKpZQnT4ZH5RWPKYMQDVke2wqjKbAnNv8= From: David Gibson To: peter.maydell@linaro.org Date: Tue, 3 Jul 2018 15:57:56 +1000 Message-Id: <20180703055804.13449-28-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180703055804.13449-1-david@gibson.dropbear.id.au> References: <20180703055804.13449-1-david@gibson.dropbear.id.au> 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: 2401:3900:2:1::2 Subject: [Qemu-devel] [PULL 27/35] hw/timer: Add basic M41T80 emulation 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: qemu-devel@nongnu.org, mdroth@linux.vnet.ibm.com, agraf@suse.de, aik@ozlabs.ru, groug@kaod.org, qemu-ppc@nongnu.org, clg@kaod.org, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" From: BALATON Zoltan Basic emulation of the M41T80 serial (I2C) RTC chip. Only getting time of day is implemented. Setting time and RTC alarm are not supported. Signed-off-by: BALATON Zoltan Reviewed-by: C=C3=A9dric Le Goater Signed-off-by: David Gibson --- MAINTAINERS | 1 + default-configs/ppc-softmmu.mak | 1 + hw/timer/Makefile.objs | 1 + hw/timer/m41t80.c | 117 ++++++++++++++++++++++++++++++++ 4 files changed, 120 insertions(+) create mode 100644 hw/timer/m41t80.c diff --git a/MAINTAINERS b/MAINTAINERS index 42a1892d6a..6630d691d1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -851,6 +851,7 @@ M: BALATON Zoltan L: qemu-ppc@nongnu.org S: Maintained F: hw/ide/sii3112.c +F: hw/timer/m41t80.c =20 SH4 Machines ------------ diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.= mak index 475120bda2..7e1a3d8135 100644 --- a/default-configs/ppc-softmmu.mak +++ b/default-configs/ppc-softmmu.mak @@ -28,6 +28,7 @@ CONFIG_SM501=3Dy CONFIG_IDE_SII3112=3Dy CONFIG_I2C=3Dy CONFIG_BITBANG_I2C=3Dy +CONFIG_M41T80=3Dy =20 # For Macs CONFIG_MAC=3Dy diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs index 8b27a4b7ef..e16b2b913c 100644 --- a/hw/timer/Makefile.objs +++ b/hw/timer/Makefile.objs @@ -6,6 +6,7 @@ common-obj-$(CONFIG_CADENCE) +=3D cadence_ttc.o common-obj-$(CONFIG_DS1338) +=3D ds1338.o common-obj-$(CONFIG_HPET) +=3D hpet.o common-obj-$(CONFIG_I8254) +=3D i8254_common.o i8254.o +common-obj-$(CONFIG_M41T80) +=3D m41t80.o common-obj-$(CONFIG_M48T59) +=3D m48t59.o ifeq ($(CONFIG_ISA_BUS),y) common-obj-$(CONFIG_M48T59) +=3D m48t59-isa.o diff --git a/hw/timer/m41t80.c b/hw/timer/m41t80.c new file mode 100644 index 0000000000..734d7d95fc --- /dev/null +++ b/hw/timer/m41t80.c @@ -0,0 +1,117 @@ +/* + * M41T80 serial rtc emulation + * + * Copyright (c) 2018 BALATON Zoltan + * + * This work is licensed under the GNU GPL license version 2 or later. + * + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/timer.h" +#include "qemu/bcd.h" +#include "hw/i2c/i2c.h" + +#define TYPE_M41T80 "m41t80" +#define M41T80(obj) OBJECT_CHECK(M41t80State, (obj), TYPE_M41T80) + +typedef struct M41t80State { + I2CSlave parent_obj; + int8_t addr; +} M41t80State; + +static void m41t80_realize(DeviceState *dev, Error **errp) +{ + M41t80State *s =3D M41T80(dev); + + s->addr =3D -1; +} + +static int m41t80_send(I2CSlave *i2c, uint8_t data) +{ + M41t80State *s =3D M41T80(i2c); + + if (s->addr < 0) { + s->addr =3D data; + } else { + s->addr++; + } + return 0; +} + +static int m41t80_recv(I2CSlave *i2c) +{ + M41t80State *s =3D M41T80(i2c); + struct tm now; + qemu_timeval tv; + + if (s->addr < 0) { + s->addr =3D 0; + } + if (s->addr >=3D 1 && s->addr <=3D 7) { + qemu_get_timedate(&now, -1); + } + switch (s->addr++) { + case 0: + qemu_gettimeofday(&tv); + return to_bcd(tv.tv_usec / 10000); + case 1: + return to_bcd(now.tm_sec); + case 2: + return to_bcd(now.tm_min); + case 3: + return to_bcd(now.tm_hour); + case 4: + return to_bcd(now.tm_wday); + case 5: + return to_bcd(now.tm_mday); + case 6: + return to_bcd(now.tm_mon + 1); + case 7: + return to_bcd(now.tm_year % 100); + case 8 ... 19: + qemu_log_mask(LOG_UNIMP, "%s: unimplemented register: %d\n", + __func__, s->addr - 1); + return 0; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register: %d\n", + __func__, s->addr - 1); + return 0; + } +} + +static int m41t80_event(I2CSlave *i2c, enum i2c_event event) +{ + M41t80State *s =3D M41T80(i2c); + + if (event =3D=3D I2C_START_SEND) { + s->addr =3D -1; + } + return 0; +} + +static void m41t80_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + I2CSlaveClass *sc =3D I2C_SLAVE_CLASS(klass); + + dc->realize =3D m41t80_realize; + sc->send =3D m41t80_send; + sc->recv =3D m41t80_recv; + sc->event =3D m41t80_event; +} + +static const TypeInfo m41t80_info =3D { + .name =3D TYPE_M41T80, + .parent =3D TYPE_I2C_SLAVE, + .instance_size =3D sizeof(M41t80State), + .class_init =3D m41t80_class_init, +}; + +static void m41t80_register_types(void) +{ + type_register_static(&m41t80_info); +} + +type_init(m41t80_register_types) --=20 2.17.1