diff options
Diffstat (limited to 'hw/char')
| -rw-r--r-- | hw/char/Makefile.objs | 1 | ||||
| -rw-r--r-- | hw/char/cadence_uart.c | 153 | ||||
| -rw-r--r-- | hw/char/digic-uart.c | 195 | ||||
| -rw-r--r-- | hw/char/exynos4210_uart.c | 6 | ||||
| -rw-r--r-- | hw/char/virtio-serial-bus.c | 33 |
5 files changed, 302 insertions, 86 deletions
diff --git a/hw/char/Makefile.objs b/hw/char/Makefile.objs index cbd6a006f4..be2a7d953a 100644 --- a/hw/char/Makefile.objs +++ b/hw/char/Makefile.objs @@ -14,6 +14,7 @@ obj-$(CONFIG_COLDFIRE) += mcf_uart.o obj-$(CONFIG_OMAP) += omap_uart.o obj-$(CONFIG_SH4) += sh_serial.o obj-$(CONFIG_PSERIES) += spapr_vty.o +obj-$(CONFIG_DIGIC) += digic-uart.o common-obj-$(CONFIG_ETRAXFS) += etraxfs_ser.o common-obj-$(CONFIG_ISA_DEBUG) += debugcon.o diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c index f18db53bca..1012f1ad64 100644 --- a/hw/char/cadence_uart.c +++ b/hw/char/cadence_uart.c @@ -34,6 +34,9 @@ #define UART_SR_INTR_RFUL 0x00000004 #define UART_SR_INTR_TEMPTY 0x00000008 #define UART_SR_INTR_TFUL 0x00000010 +/* somewhat awkwardly, TTRIG is misaligned between SR and ISR */ +#define UART_SR_TTRIG 0x00002000 +#define UART_INTR_TTRIG 0x00000400 /* bits fields in CSR that correlate to CISR. If any of these bits are set in * SR, then the same bit in CISR is set high too */ #define UART_SR_TO_CISR_MASK 0x0000001F @@ -43,6 +46,7 @@ #define UART_INTR_PARE 0x00000080 #define UART_INTR_TIMEOUT 0x00000100 #define UART_INTR_DMSI 0x00000200 +#define UART_INTR_TOVR 0x00001000 #define UART_SR_RACTIVE 0x00000400 #define UART_SR_TACTIVE 0x00000800 @@ -110,23 +114,37 @@ #define CADENCE_UART(obj) OBJECT_CHECK(UartState, (obj), TYPE_CADENCE_UART) typedef struct { + /*< private >*/ SysBusDevice parent_obj; + /*< public >*/ MemoryRegion iomem; uint32_t r[R_MAX]; - uint8_t r_fifo[RX_FIFO_SIZE]; + uint8_t rx_fifo[RX_FIFO_SIZE]; + uint8_t tx_fifo[TX_FIFO_SIZE]; uint32_t rx_wpos; uint32_t rx_count; + uint32_t tx_count; uint64_t char_tx_time; CharDriverState *chr; qemu_irq irq; QEMUTimer *fifo_trigger_handle; - QEMUTimer *tx_time_handle; } UartState; static void uart_update_status(UartState *s) { + s->r[R_SR] = 0; + + s->r[R_SR] |= s->rx_count == RX_FIFO_SIZE ? UART_SR_INTR_RFUL : 0; + s->r[R_SR] |= !s->rx_count ? UART_SR_INTR_REMPTY : 0; + s->r[R_SR] |= s->rx_count >= s->r[R_RTRIG] ? UART_SR_INTR_RTRIG : 0; + + s->r[R_SR] |= s->tx_count == TX_FIFO_SIZE ? UART_SR_INTR_TFUL : 0; + s->r[R_SR] |= !s->tx_count ? UART_SR_INTR_TEMPTY : 0; + s->r[R_SR] |= s->tx_count >= s->r[R_TTRIG] ? UART_SR_TTRIG : 0; + s->r[R_CISR] |= s->r[R_SR] & UART_SR_TO_CISR_MASK; + s->r[R_CISR] |= s->r[R_SR] & UART_SR_TTRIG ? UART_INTR_TTRIG : 0; qemu_set_irq(s->irq, !!(s->r[R_IMR] & s->r[R_CISR])); } @@ -139,24 +157,6 @@ static void fifo_trigger_update(void *opaque) uart_update_status(s); } -static void uart_tx_redo(UartState *s) -{ - uint64_t new_tx_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - - timer_mod(s->tx_time_handle, new_tx_time + s->char_tx_time); - - s->r[R_SR] |= UART_SR_INTR_TEMPTY; - - uart_update_status(s); -} - -static void uart_tx_write(void *opaque) -{ - UartState *s = (UartState *)opaque; - - uart_tx_redo(s); -} - static void uart_rx_reset(UartState *s) { s->rx_wpos = 0; @@ -164,15 +164,11 @@ static void uart_rx_reset(UartState *s) if (s->chr) { qemu_chr_accept_input(s->chr); } - - s->r[R_SR] |= UART_SR_INTR_REMPTY; - s->r[R_SR] &= ~UART_SR_INTR_RFUL; } static void uart_tx_reset(UartState *s) { - s->r[R_SR] |= UART_SR_INTR_TEMPTY; - s->r[R_SR] &= ~UART_SR_INTR_TFUL; + s->tx_count = 0; } static void uart_send_breaks(UartState *s) @@ -237,8 +233,16 @@ static void uart_parameters_setup(UartState *s) static int uart_can_receive(void *opaque) { UartState *s = (UartState *)opaque; + int ret = MAX(RX_FIFO_SIZE, TX_FIFO_SIZE); + uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE; - return RX_FIFO_SIZE - s->rx_count; + if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) { + ret = MIN(ret, RX_FIFO_SIZE - s->rx_count); + } + if (ch_mode == REMOTE_LOOPBACK || ch_mode == ECHO_MODE) { + ret = MIN(ret, TX_FIFO_SIZE - s->tx_count); + } + return ret; } static void uart_ctrl_update(UartState *s) @@ -253,10 +257,6 @@ static void uart_ctrl_update(UartState *s) s->r[R_CR] &= ~(UART_CR_TXRST | UART_CR_RXRST); - if ((s->r[R_CR] & UART_CR_TX_EN) && !(s->r[R_CR] & UART_CR_TX_DIS)) { - uart_tx_redo(s); - } - if (s->r[R_CR] & UART_CR_STARTBRK && !(s->r[R_CR] & UART_CR_STOPBRK)) { uart_send_breaks(s); } @@ -272,24 +272,13 @@ static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) return; } - s->r[R_SR] &= ~UART_SR_INTR_REMPTY; - if (s->rx_count == RX_FIFO_SIZE) { s->r[R_CISR] |= UART_INTR_ROVR; } else { for (i = 0; i < size; i++) { - s->r_fifo[s->rx_wpos] = buf[i]; + s->rx_fifo[s->rx_wpos] = buf[i]; s->rx_wpos = (s->rx_wpos + 1) % RX_FIFO_SIZE; s->rx_count++; - - if (s->rx_count == RX_FIFO_SIZE) { - s->r[R_SR] |= UART_SR_INTR_RFUL; - break; - } - - if (s->rx_count >= s->r[R_RTRIG]) { - s->r[R_SR] |= UART_SR_INTR_RTRIG; - } } timer_mod(s->fifo_trigger_handle, new_rx_time + (s->char_tx_time * 4)); @@ -297,13 +286,55 @@ static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) uart_update_status(s); } +static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond, + void *opaque) +{ + UartState *s = opaque; + int ret; + + /* instant drain the fifo when there's no back-end */ + if (!s->chr) { + s->tx_count = 0; + } + + if (!s->tx_count) { + return FALSE; + } + + ret = qemu_chr_fe_write(s->chr, s->tx_fifo, s->tx_count); + s->tx_count -= ret; + memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count); + + if (s->tx_count) { + int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT, cadence_uart_xmit, s); + assert(r); + } + + uart_update_status(s); + return FALSE; +} + static void uart_write_tx_fifo(UartState *s, const uint8_t *buf, int size) { if ((s->r[R_CR] & UART_CR_TX_DIS) || !(s->r[R_CR] & UART_CR_TX_EN)) { return; } - qemu_chr_fe_write_all(s->chr, buf, size); + if (size > TX_FIFO_SIZE - s->tx_count) { + size = TX_FIFO_SIZE - s->tx_count; + /* + * This can only be a guest error via a bad tx fifo register push, + * as can_receive() should stop remote loop and echo modes ever getting + * us to here. + */ + qemu_log_mask(LOG_GUEST_ERROR, "cadence_uart: TxFIFO overflow"); + s->r[R_CISR] |= UART_INTR_ROVR; + } + + memcpy(s->tx_fifo + s->tx_count, buf, size); + s->tx_count += size; + + cadence_uart_xmit(NULL, G_IO_OUT, s); } static void uart_receive(void *opaque, const uint8_t *buf, int size) @@ -337,26 +368,17 @@ static void uart_read_rx_fifo(UartState *s, uint32_t *c) return; } - s->r[R_SR] &= ~UART_SR_INTR_RFUL; - if (s->rx_count) { uint32_t rx_rpos = (RX_FIFO_SIZE + s->rx_wpos - s->rx_count) % RX_FIFO_SIZE; - *c = s->r_fifo[rx_rpos]; + *c = s->rx_fifo[rx_rpos]; s->rx_count--; - if (!s->rx_count) { - s->r[R_SR] |= UART_SR_INTR_REMPTY; - } qemu_chr_accept_input(s->chr); } else { *c = 0; - s->r[R_SR] |= UART_SR_INTR_REMPTY; } - if (s->rx_count < s->r[R_RTRIG]) { - s->r[R_SR] &= ~UART_SR_INTR_RTRIG; - } uart_update_status(s); } @@ -401,6 +423,7 @@ static void uart_write(void *opaque, hwaddr offset, uart_parameters_setup(s); break; } + uart_update_status(s); } static uint64_t uart_read(void *opaque, hwaddr offset, @@ -428,8 +451,10 @@ static const MemoryRegionOps uart_ops = { .endianness = DEVICE_NATIVE_ENDIAN, }; -static void cadence_uart_reset(UartState *s) +static void cadence_uart_reset(DeviceState *dev) { + UartState *s = CADENCE_UART(dev); + s->r[R_CR] = 0x00000128; s->r[R_IMR] = 0; s->r[R_CISR] = 0; @@ -440,8 +465,7 @@ static void cadence_uart_reset(UartState *s) uart_rx_reset(s); uart_tx_reset(s); - s->rx_count = 0; - s->rx_wpos = 0; + uart_update_status(s); } static int cadence_uart_init(SysBusDevice *dev) @@ -455,15 +479,10 @@ static int cadence_uart_init(SysBusDevice *dev) s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL, (QEMUTimerCB *)fifo_trigger_update, s); - s->tx_time_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL, - (QEMUTimerCB *)uart_tx_write, s); - s->char_tx_time = (get_ticks_per_sec() / 9600) * 10; s->chr = qemu_char_get_next_serial(); - cadence_uart_reset(s); - if (s->chr) { qemu_chr_add_handlers(s->chr, uart_can_receive, uart_receive, uart_event, s); @@ -483,17 +502,18 @@ static int cadence_uart_post_load(void *opaque, int version_id) static const VMStateDescription vmstate_cadence_uart = { .name = "cadence_uart", - .version_id = 1, - .minimum_version_id = 1, - .minimum_version_id_old = 1, + .version_id = 2, + .minimum_version_id = 2, + .minimum_version_id_old = 2, .post_load = cadence_uart_post_load, .fields = (VMStateField[]) { VMSTATE_UINT32_ARRAY(r, UartState, R_MAX), - VMSTATE_UINT8_ARRAY(r_fifo, UartState, RX_FIFO_SIZE), + VMSTATE_UINT8_ARRAY(rx_fifo, UartState, RX_FIFO_SIZE), + VMSTATE_UINT8_ARRAY(tx_fifo, UartState, RX_FIFO_SIZE), VMSTATE_UINT32(rx_count, UartState), + VMSTATE_UINT32(tx_count, UartState), VMSTATE_UINT32(rx_wpos, UartState), VMSTATE_TIMER(fifo_trigger_handle, UartState), - VMSTATE_TIMER(tx_time_handle, UartState), VMSTATE_END_OF_LIST() } }; @@ -505,6 +525,7 @@ static void cadence_uart_class_init(ObjectClass *klass, void *data) sdc->init = cadence_uart_init; dc->vmsd = &vmstate_cadence_uart; + dc->reset = cadence_uart_reset; } static const TypeInfo cadence_uart_info = { diff --git a/hw/char/digic-uart.c b/hw/char/digic-uart.c new file mode 100644 index 0000000000..fd8e07713d --- /dev/null +++ b/hw/char/digic-uart.c @@ -0,0 +1,195 @@ +/* + * QEMU model of the Canon DIGIC UART block. + * + * Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com> + * + * This model is based on reverse engineering efforts + * made by CHDK (http://chdk.wikia.com) and + * Magic Lantern (http://www.magiclantern.fm) projects + * contributors. + * + * See "Serial terminal" docs here: + * http://magiclantern.wikia.com/wiki/Register_Map#Misc_Registers + * + * The QEMU model of the Milkymist UART block by Michael Walle + * is used as a template. + * + * 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. + * + */ + +#include "hw/hw.h" +#include "hw/sysbus.h" +#include "sysemu/char.h" + +#include "hw/char/digic-uart.h" + +enum { + ST_RX_RDY = (1 << 0), + ST_TX_RDY = (1 << 1), +}; + +static uint64_t digic_uart_read(void *opaque, hwaddr addr, + unsigned size) +{ + DigicUartState *s = opaque; + uint64_t ret = 0; + + addr >>= 2; + + switch (addr) { + case R_RX: + s->reg_st &= ~(ST_RX_RDY); + ret = s->reg_rx; + break; + + case R_ST: + ret = s->reg_st; + break; + + default: + qemu_log_mask(LOG_UNIMP, + "digic-uart: read access to unknown register 0x" + TARGET_FMT_plx, addr << 2); + } + + return ret; +} + +static void digic_uart_write(void *opaque, hwaddr addr, uint64_t value, + unsigned size) +{ + DigicUartState *s = opaque; + unsigned char ch = value; + + addr >>= 2; + + switch (addr) { + case R_TX: + if (s->chr) { + qemu_chr_fe_write_all(s->chr, &ch, 1); + } + break; + + case R_ST: + /* + * Ignore write to R_ST. + * + * The point is that this register is actively used + * during receiving and transmitting symbols, + * but we don't know the function of most of bits. + * + * Ignoring writes to R_ST is only a simplification + * of the model. It has no perceptible side effects + * for existing guests. + */ + break; + + default: + qemu_log_mask(LOG_UNIMP, + "digic-uart: write access to unknown register 0x" + TARGET_FMT_plx, addr << 2); + } +} + +static const MemoryRegionOps uart_mmio_ops = { + .read = digic_uart_read, + .write = digic_uart_write, + .valid = { + .min_access_size = 4, + .max_access_size = 4, + }, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static int uart_can_rx(void *opaque) +{ + DigicUartState *s = opaque; + + return !(s->reg_st & ST_RX_RDY); +} + +static void uart_rx(void *opaque, const uint8_t *buf, int size) +{ + DigicUartState *s = opaque; + + assert(uart_can_rx(opaque)); + + s->reg_st |= ST_RX_RDY; + s->reg_rx = *buf; +} + +static void uart_event(void *opaque, int event) +{ +} + +static void digic_uart_reset(DeviceState *d) +{ + DigicUartState *s = DIGIC_UART(d); + + s->reg_rx = 0; + s->reg_st = ST_TX_RDY; +} + +static void digic_uart_realize(DeviceState *dev, Error **errp) +{ + DigicUartState *s = DIGIC_UART(dev); + + s->chr = qemu_char_get_next_serial(); + if (s->chr) { + qemu_chr_add_handlers(s->chr, uart_can_rx, uart_rx, uart_event, s); + } +} + +static void digic_uart_init(Object *obj) +{ + DigicUartState *s = DIGIC_UART(obj); + + memory_region_init_io(&s->regs_region, OBJECT(s), &uart_mmio_ops, s, + TYPE_DIGIC_UART, 0x18); + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->regs_region); +} + +static const VMStateDescription vmstate_digic_uart = { + .name = "digic-uart", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(reg_rx, DigicUartState), + VMSTATE_UINT32(reg_st, DigicUartState), + VMSTATE_END_OF_LIST() + } +}; + +static void digic_uart_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = digic_uart_realize; + dc->reset = digic_uart_reset; + dc->vmsd = &vmstate_digic_uart; +} + +static const TypeInfo digic_uart_info = { + .name = TYPE_DIGIC_UART, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(DigicUartState), + .instance_init = digic_uart_init, + .class_init = digic_uart_class_init, +}; + +static void digic_uart_register_types(void) +{ + type_register_static(&digic_uart_info); +} + +type_init(digic_uart_register_types) diff --git a/hw/char/exynos4210_uart.c b/hw/char/exynos4210_uart.c index eef23a0ccc..19b59ccddb 100644 --- a/hw/char/exynos4210_uart.c +++ b/hw/char/exynos4210_uart.c @@ -192,10 +192,9 @@ typedef struct Exynos4210UartState { static const char *exynos4210_uart_regname(hwaddr offset) { - int regs_number = sizeof(exynos4210_uart_regs) / sizeof(Exynos4210UartReg); int i; - for (i = 0; i < regs_number; i++) { + for (i = 0; i < ARRAY_SIZE(exynos4210_uart_regs); i++) { if (offset == exynos4210_uart_regs[i].offset) { return exynos4210_uart_regs[i].name; } @@ -544,10 +543,9 @@ static void exynos4210_uart_event(void *opaque, int event) static void exynos4210_uart_reset(DeviceState *dev) { Exynos4210UartState *s = EXYNOS4210_UART(dev); - int regs_number = sizeof(exynos4210_uart_regs)/sizeof(Exynos4210UartReg); int i; - for (i = 0; i < regs_number; i++) { + for (i = 0; i < ARRAY_SIZE(exynos4210_uart_regs); i++) { s->reg[I_(exynos4210_uart_regs[i].offset)] = exynos4210_uart_regs[i].reset_value; } diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index 703f026370..226e9f9a3c 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -889,22 +889,24 @@ static int virtser_port_qdev_exit(DeviceState *qdev) return 0; } -static int virtio_serial_device_init(VirtIODevice *vdev) +static void virtio_serial_device_realize(DeviceState *dev, Error **errp) { - DeviceState *qdev = DEVICE(vdev); - VirtIOSerial *vser = VIRTIO_SERIAL(vdev); + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VirtIOSerial *vser = VIRTIO_SERIAL(dev); + BusState *bus; uint32_t i, max_supported_ports; if (!vser->serial.max_virtserial_ports) { - return -1; + error_setg(errp, "Maximum number of serial ports not specified"); + return; } /* Each port takes 2 queues, and one pair is for the control queue */ max_supported_ports = VIRTIO_PCI_QUEUE_MAX / 2 - 1; if (vser->serial.max_virtserial_ports > max_supported_ports) { - error_report("maximum ports supported: %u", max_supported_ports); - return -1; + error_setg(errp, "maximum ports supported: %u", max_supported_ports); + return; } virtio_init(vdev, "virtio-serial", VIRTIO_ID_CONSOLE, @@ -912,8 +914,9 @@ static int virtio_serial_device_init(VirtIODevice *vdev) /* Spawn a new virtio-serial bus on which the ports will ride as devices */ qbus_create_inplace(&vser->bus, sizeof(vser->bus), TYPE_VIRTIO_SERIAL_BUS, - qdev, vdev->bus_name); - vser->bus.qbus.allow_hotplug = 1; + dev, vdev->bus_name); + bus = BUS(&vser->bus); + bus->allow_hotplug = 1; vser->bus.vser = vser; QTAILQ_INIT(&vser->ports); @@ -961,10 +964,8 @@ static int virtio_serial_device_init(VirtIODevice *vdev) * Register for the savevm section with the virtio-console name * to preserve backward compat */ - register_savevm(qdev, "virtio-console", -1, 3, virtio_serial_save, + register_savevm(dev, "virtio-console", -1, 3, virtio_serial_save, virtio_serial_load, vser); - - return 0; } static void virtio_serial_port_class_init(ObjectClass *klass, void *data) @@ -987,10 +988,10 @@ static const TypeInfo virtio_serial_port_type_info = { .class_init = virtio_serial_port_class_init, }; -static int virtio_serial_device_exit(DeviceState *dev) +static void virtio_serial_device_unrealize(DeviceState *dev, Error **errp) { - VirtIOSerial *vser = VIRTIO_SERIAL(dev); VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VirtIOSerial *vser = VIRTIO_SERIAL(dev); unregister_savevm(dev, "virtio-console", vser); @@ -1004,7 +1005,6 @@ static int virtio_serial_device_exit(DeviceState *dev) g_free(vser->post_load); } virtio_cleanup(vdev); - return 0; } static Property virtio_serial_properties[] = { @@ -1016,10 +1016,11 @@ static void virtio_serial_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); - dc->exit = virtio_serial_device_exit; + dc->props = virtio_serial_properties; set_bit(DEVICE_CATEGORY_INPUT, dc->categories); - vdc->init = virtio_serial_device_init; + vdc->realize = virtio_serial_device_realize; + vdc->unrealize = virtio_serial_device_unrealize; vdc->get_features = get_features; vdc->get_config = get_config; vdc->set_config = set_config; |