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[189.204.159.168]) by smtp.gmail.com with ESMTPSA id r23sm2391176otg.49.2019.05.31.06.43.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 31 May 2019 06:43:29 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 31 May 2019 08:42:59 -0500 Message-Id: <20190531134315.4109-8-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190531134315.4109-1-richard.henderson@linaro.org> References: <20190531134315.4109-1-richard.henderson@linaro.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::336 Subject: [Qemu-devel] [PATCH v16 07/23] hw/char: RX62N serial communication interface (SCI) 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: philmd@redhat.com, ysato@users.sourceforge.jp Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Yoshinori Sato This module supported only non FIFO type. Hardware manual. https://www.renesas.com/us/en/doc/products/mpumcu/doc/rx_family/r01uh0033ej0140_rx62n.pdf Signed-off-by: Yoshinori Sato Reviewed-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20190516055244.95559-8-ysato@users.sourceforge.jp> Signed-off-by: Richard Henderson --- include/hw/char/renesas_sci.h | 45 +++++ hw/char/renesas_sci.c | 340 ++++++++++++++++++++++++++++++++++ hw/char/Kconfig | 3 + hw/char/Makefile.objs | 1 + 4 files changed, 389 insertions(+) create mode 100644 include/hw/char/renesas_sci.h create mode 100644 hw/char/renesas_sci.c -- 2.17.1 diff --git a/include/hw/char/renesas_sci.h b/include/hw/char/renesas_sci.h new file mode 100644 index 0000000000..50d1336944 --- /dev/null +++ b/include/hw/char/renesas_sci.h @@ -0,0 +1,45 @@ +/* + * Renesas Serial Communication Interface + * + * Copyright (c) 2018 Yoshinori Sato + * + * This code is licensed under the GPL version 2 or later. + * + */ + +#include "chardev/char-fe.h" +#include "qemu/timer.h" +#include "hw/sysbus.h" + +#define TYPE_RENESAS_SCI "renesas-sci" +#define RSCI(obj) OBJECT_CHECK(RSCIState, (obj), TYPE_RENESAS_SCI) + +enum { + ERI = 0, + RXI = 1, + TXI = 2, + TEI = 3, + SCI_NR_IRQ = 4, +}; + +typedef struct { + SysBusDevice parent_obj; + MemoryRegion memory; + + uint8_t smr; + uint8_t brr; + uint8_t scr; + uint8_t tdr; + uint8_t ssr; + uint8_t rdr; + uint8_t scmr; + uint8_t semr; + + uint8_t read_ssr; + int64_t trtime; + int64_t rx_next; + QEMUTimer *timer; + CharBackend chr; + uint64_t input_freq; + qemu_irq irq[SCI_NR_IRQ]; +} RSCIState; diff --git a/hw/char/renesas_sci.c b/hw/char/renesas_sci.c new file mode 100644 index 0000000000..6298cbf43a --- /dev/null +++ b/hw/char/renesas_sci.c @@ -0,0 +1,340 @@ +/* + * Renesas Serial Communication Interface + * + * Datasheet: RX62N Group, RX621 Group User's Manual: Hardware + * (Rev.1.40 R01UH0033EJ0140) + * + * Copyright (c) 2019 Yoshinori Sato + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 "qemu/osdep.h" +#include "qemu/log.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "cpu.h" +#include "hw/hw.h" +#include "hw/sysbus.h" +#include "hw/registerfields.h" +#include "hw/char/renesas_sci.h" +#include "qemu/error-report.h" + +/* SCI register map */ +REG8(SMR, 0) + FIELD(SMR, CKS, 0, 2) + FIELD(SMR, MP, 2, 1) + FIELD(SMR, STOP, 3, 1) + FIELD(SMR, PM, 4, 1) + FIELD(SMR, PE, 5, 1) + FIELD(SMR, CHR, 6, 1) + FIELD(SMR, CM, 7, 1) +REG8(BRR, 1) +REG8(SCR, 2) + FIELD(SCR, CKE, 0, 2) + FIELD(SCR, TEIE, 2, 1) + FIELD(SCR, MPIE, 3, 1) + FIELD(SCR, RE, 4, 1) + FIELD(SCR, TE, 5, 1) + FIELD(SCR, RIE, 6, 1) + FIELD(SCR, TIE, 7, 1) +REG8(TDR, 3) +REG8(SSR, 4) + FIELD(SSR, MPBT, 0, 1) + FIELD(SSR, MPB, 1, 1) + FIELD(SSR, TEND, 2, 1) + FIELD(SSR, ERR, 3, 3) + FIELD(SSR, PER, 3, 1) + FIELD(SSR, FER, 4, 1) + FIELD(SSR, ORER, 5, 1) + FIELD(SSR, RDRF, 6, 1) + FIELD(SSR, TDRE, 7, 1) +REG8(RDR, 5) +REG8(SCMR, 6) + FIELD(SCMR, SMIF, 0, 1) + FIELD(SCMR, SINV, 2, 1) + FIELD(SCMR, SDIR, 3, 1) + FIELD(SCMR, BCP2, 7, 1) +REG8(SEMR, 7) + FIELD(SEMR, ACS0, 0, 1) + FIELD(SEMR, ABCS, 4, 1) + +static int can_receive(void *opaque) +{ + RSCIState *sci = RSCI(opaque); + if (sci->rx_next > qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) { + return 0; + } else { + return FIELD_EX8(sci->scr, SCR, RE); + } +} + +static void receive(void *opaque, const uint8_t *buf, int size) +{ + RSCIState *sci = RSCI(opaque); + sci->rx_next = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + sci->trtime; + if (FIELD_EX8(sci->ssr, SSR, RDRF) || size > 1) { + sci->ssr = FIELD_DP8(sci->ssr, SSR, ORER, 1); + if (FIELD_EX8(sci->scr, SCR, RIE)) { + qemu_set_irq(sci->irq[ERI], 1); + } + } else { + sci->rdr = buf[0]; + sci->ssr = FIELD_DP8(sci->ssr, SSR, RDRF, 1); + if (FIELD_EX8(sci->scr, SCR, RIE)) { + qemu_irq_pulse(sci->irq[RXI]); + } + } +} + +static void send_byte(RSCIState *sci) +{ + if (qemu_chr_fe_backend_connected(&sci->chr)) { + qemu_chr_fe_write_all(&sci->chr, &sci->tdr, 1); + } + timer_mod(sci->timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + sci->trtime); + sci->ssr = FIELD_DP8(sci->ssr, SSR, TEND, 0); + sci->ssr = FIELD_DP8(sci->ssr, SSR, TDRE, 1); + qemu_set_irq(sci->irq[TEI], 0); + if (FIELD_EX8(sci->scr, SCR, TIE)) { + qemu_irq_pulse(sci->irq[TXI]); + } +} + +static void txend(void *opaque) +{ + RSCIState *sci = RSCI(opaque); + if (!FIELD_EX8(sci->ssr, SSR, TDRE)) { + send_byte(sci); + } else { + sci->ssr = FIELD_DP8(sci->ssr, SSR, TEND, 1); + if (FIELD_EX8(sci->scr, SCR, TEIE)) { + qemu_set_irq(sci->irq[TEI], 1); + } + } +} + +static void update_trtime(RSCIState *sci) +{ + /* char per bits */ + sci->trtime = 8 - FIELD_EX8(sci->smr, SMR, CHR); + sci->trtime += FIELD_EX8(sci->smr, SMR, PE); + sci->trtime += FIELD_EX8(sci->smr, SMR, STOP) + 1; + /* x bit transmit time (32 * divrate * brr) / base freq */ + sci->trtime *= 32 * sci->brr; + sci->trtime *= 1 << (2 * FIELD_EX8(sci->smr, SMR, CKS)); + sci->trtime *= NANOSECONDS_PER_SECOND; + sci->trtime /= sci->input_freq; +} + +#define IS_TR_ENABLED(scr) \ + (FIELD_EX8(scr, SCR, TE) || FIELD_EX8(scr, SCR, RE)) + +static void sci_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) +{ + hwaddr offset = addr & 0x07; + RSCIState *sci = RSCI(opaque); + + switch (offset) { + case A_SMR: + if (!IS_TR_ENABLED(sci->scr)) { + sci->smr = val; + update_trtime(sci); + } + break; + case A_BRR: + if (!IS_TR_ENABLED(sci->scr)) { + sci->brr = val; + update_trtime(sci); + } + break; + case A_SCR: + sci->scr = val; + if (FIELD_EX8(sci->scr, SCR, TE)) { + sci->ssr = FIELD_DP8(sci->ssr, SSR, TDRE, 1); + sci->ssr = FIELD_DP8(sci->ssr, SSR, TEND, 1); + if (FIELD_EX8(sci->scr, SCR, TIE)) { + qemu_irq_pulse(sci->irq[TXI]); + } + } + if (!FIELD_EX8(sci->scr, SCR, TEIE)) { + qemu_set_irq(sci->irq[TEI], 0); + } + if (!FIELD_EX8(sci->scr, SCR, RIE)) { + qemu_set_irq(sci->irq[ERI], 0); + } + break; + case A_TDR: + sci->tdr = val; + if (FIELD_EX8(sci->ssr, SSR, TEND)) { + send_byte(sci); + } else { + sci->ssr = FIELD_DP8(sci->ssr, SSR, TDRE, 0); + } + break; + case A_SSR: + sci->ssr = FIELD_DP8(sci->ssr, SSR, MPBT, + FIELD_EX8(val, SSR, MPBT)); + sci->ssr = FIELD_DP8(sci->ssr, SSR, ERR, + FIELD_EX8(val, SSR, ERR) & 0x07); + if (FIELD_EX8(sci->read_ssr, SSR, ERR) && + FIELD_EX8(sci->ssr, SSR, ERR) == 0) { + qemu_set_irq(sci->irq[ERI], 0); + } + break; + case A_RDR: + qemu_log_mask(LOG_GUEST_ERROR, "reneas_sci: RDR is read only.\n"); + break; + case A_SCMR: + sci->scmr = val; break; + case A_SEMR: /* SEMR */ + sci->semr = val; break; + default: + qemu_log_mask(LOG_UNIMP, "renesas_sci: Register 0x%" HWADDR_PRIX + " not implemented\n", offset); + } +} + +static uint64_t sci_read(void *opaque, hwaddr addr, unsigned size) +{ + hwaddr offset = addr & 0x07; + RSCIState *sci = RSCI(opaque); + + switch (offset) { + case A_SMR: + return sci->smr; + case A_BRR: + return sci->brr; + case A_SCR: + return sci->scr; + case A_TDR: + return sci->tdr; + case A_SSR: + sci->read_ssr = sci->ssr; + return sci->ssr; + case A_RDR: + sci->ssr = FIELD_DP8(sci->ssr, SSR, RDRF, 0); + return sci->rdr; + case A_SCMR: + return sci->scmr; + case A_SEMR: + return sci->semr; + default: + qemu_log_mask(LOG_UNIMP, "renesas_sci: Register 0x%" HWADDR_PRIX + " not implemented.\n", offset); + } + return UINT64_MAX; +} + +static const MemoryRegionOps sci_ops = { + .write = sci_write, + .read = sci_read, + .endianness = DEVICE_NATIVE_ENDIAN, + .impl = { + .max_access_size = 1, + }, +}; + +static void rsci_reset(DeviceState *dev) +{ + RSCIState *sci = RSCI(dev); + sci->smr = sci->scr = 0x00; + sci->brr = 0xff; + sci->tdr = 0xff; + sci->rdr = 0x00; + sci->ssr = 0x84; + sci->scmr = 0x00; + sci->semr = 0x00; + sci->rx_next = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); +} + +static void sci_event(void *opaque, int event) +{ + RSCIState *sci = RSCI(opaque); + if (event == CHR_EVENT_BREAK) { + sci->ssr = FIELD_DP8(sci->ssr, SSR, FER, 1); + if (FIELD_EX8(sci->scr, SCR, RIE)) { + qemu_set_irq(sci->irq[ERI], 1); + } + } +} + +static void rsci_realize(DeviceState *dev, Error **errp) +{ + RSCIState *sci = RSCI(dev); + + if (sci->input_freq == 0) { + qemu_log_mask(LOG_GUEST_ERROR, + "renesas_sci: input-freq property must be set."); + return; + } + qemu_chr_fe_set_handlers(&sci->chr, can_receive, receive, + sci_event, NULL, sci, NULL, true); +} + +static void rsci_init(Object *obj) +{ + SysBusDevice *d = SYS_BUS_DEVICE(obj); + RSCIState *sci = RSCI(obj); + int i; + + memory_region_init_io(&sci->memory, OBJECT(sci), &sci_ops, + sci, "renesas-sci", 0x8); + sysbus_init_mmio(d, &sci->memory); + + for (i = 0; i < SCI_NR_IRQ; i++) { + sysbus_init_irq(d, &sci->irq[i]); + } + sci->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, txend, sci); +} + +static const VMStateDescription vmstate_rcmt = { + .name = "renesas-sci", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_END_OF_LIST() + } +}; + +static Property rsci_properties[] = { + DEFINE_PROP_UINT64("input-freq", RSCIState, input_freq, 0), + DEFINE_PROP_CHR("chardev", RSCIState, chr), + DEFINE_PROP_END_OF_LIST(), +}; + +static void rsci_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = rsci_realize; + dc->props = rsci_properties; + dc->vmsd = &vmstate_rcmt; + dc->reset = rsci_reset; +} + +static const TypeInfo rsci_info = { + .name = TYPE_RENESAS_SCI, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(RSCIState), + .instance_init = rsci_init, + .class_init = rsci_class_init, +}; + +static void rsci_register_types(void) +{ + type_register_static(&rsci_info); +} + +type_init(rsci_register_types) diff --git a/hw/char/Kconfig b/hw/char/Kconfig index 40e7a8b8bb..874627520c 100644 --- a/hw/char/Kconfig +++ b/hw/char/Kconfig @@ -46,3 +46,6 @@ config SCLPCONSOLE config TERMINAL3270 bool + +config RENESAS_SCI + bool diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs index 02d8a66925..4472d563b5 100644 --- a/hw/char/Makefile.objs +++ b/hw/char/Makefile.objs @@ -21,6 +21,7 @@ obj-$(CONFIG_PSERIES) += spapr_vty.o obj-$(CONFIG_DIGIC) += digic-uart.o obj-$(CONFIG_STM32F2XX_USART) += stm32f2xx_usart.o obj-$(CONFIG_RASPI) += bcm2835_aux.o +obj-$(CONFIG_RENESAS_SCI) += renesas_sci.o common-obj-$(CONFIG_CMSDK_APB_UART) += cmsdk-apb-uart.o common-obj-$(CONFIG_ETRAXFS) += etraxfs_ser.o