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-rw-r--r--hw/char/lm32_uart.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/hw/char/lm32_uart.c b/hw/char/lm32_uart.c
deleted file mode 100644
index d8e0331..0000000
--- a/hw/char/lm32_uart.c
+++ /dev/null
@@ -1,314 +0,0 @@
-/*
- * QEMU model of the LatticeMico32 UART block.
- *
- * Copyright (c) 2010 Michael Walle <michael@walle.cc>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- *
- *
- * Specification available at:
- * http://www.latticesemi.com/documents/mico32uart.pdf
- */
-
-
-#include "qemu/osdep.h"
-#include "hw/irq.h"
-#include "hw/qdev-properties.h"
-#include "hw/qdev-properties-system.h"
-#include "hw/sysbus.h"
-#include "migration/vmstate.h"
-#include "trace.h"
-#include "chardev/char-fe.h"
-#include "qemu/error-report.h"
-#include "qemu/module.h"
-#include "qom/object.h"
-
-enum {
- R_RXTX = 0,
- R_IER,
- R_IIR,
- R_LCR,
- R_MCR,
- R_LSR,
- R_MSR,
- R_DIV,
- R_MAX
-};
-
-enum {
- IER_RBRI = (1<<0),
- IER_THRI = (1<<1),
- IER_RLSI = (1<<2),
- IER_MSI = (1<<3),
-};
-
-enum {
- IIR_STAT = (1<<0),
- IIR_ID0 = (1<<1),
- IIR_ID1 = (1<<2),
-};
-
-enum {
- LCR_WLS0 = (1<<0),
- LCR_WLS1 = (1<<1),
- LCR_STB = (1<<2),
- LCR_PEN = (1<<3),
- LCR_EPS = (1<<4),
- LCR_SP = (1<<5),
- LCR_SB = (1<<6),
-};
-
-enum {
- MCR_DTR = (1<<0),
- MCR_RTS = (1<<1),
-};
-
-enum {
- LSR_DR = (1<<0),
- LSR_OE = (1<<1),
- LSR_PE = (1<<2),
- LSR_FE = (1<<3),
- LSR_BI = (1<<4),
- LSR_THRE = (1<<5),
- LSR_TEMT = (1<<6),
-};
-
-enum {
- MSR_DCTS = (1<<0),
- MSR_DDSR = (1<<1),
- MSR_TERI = (1<<2),
- MSR_DDCD = (1<<3),
- MSR_CTS = (1<<4),
- MSR_DSR = (1<<5),
- MSR_RI = (1<<6),
- MSR_DCD = (1<<7),
-};
-
-#define TYPE_LM32_UART "lm32-uart"
-OBJECT_DECLARE_SIMPLE_TYPE(LM32UartState, LM32_UART)
-
-struct LM32UartState {
- SysBusDevice parent_obj;
-
- MemoryRegion iomem;
- CharBackend chr;
- qemu_irq irq;
-
- uint32_t regs[R_MAX];
-};
-
-static void uart_update_irq(LM32UartState *s)
-{
- unsigned int irq;
-
- if ((s->regs[R_LSR] & (LSR_OE | LSR_PE | LSR_FE | LSR_BI))
- && (s->regs[R_IER] & IER_RLSI)) {
- irq = 1;
- s->regs[R_IIR] = IIR_ID1 | IIR_ID0;
- } else if ((s->regs[R_LSR] & LSR_DR) && (s->regs[R_IER] & IER_RBRI)) {
- irq = 1;
- s->regs[R_IIR] = IIR_ID1;
- } else if ((s->regs[R_LSR] & LSR_THRE) && (s->regs[R_IER] & IER_THRI)) {
- irq = 1;
- s->regs[R_IIR] = IIR_ID0;
- } else if ((s->regs[R_MSR] & 0x0f) && (s->regs[R_IER] & IER_MSI)) {
- irq = 1;
- s->regs[R_IIR] = 0;
- } else {
- irq = 0;
- s->regs[R_IIR] = IIR_STAT;
- }
-
- trace_lm32_uart_irq_state(irq);
- qemu_set_irq(s->irq, irq);
-}
-
-static uint64_t uart_read(void *opaque, hwaddr addr,
- unsigned size)
-{
- LM32UartState *s = opaque;
- uint32_t r = 0;
-
- addr >>= 2;
- switch (addr) {
- case R_RXTX:
- r = s->regs[R_RXTX];
- s->regs[R_LSR] &= ~LSR_DR;
- uart_update_irq(s);
- qemu_chr_fe_accept_input(&s->chr);
- break;
- case R_IIR:
- case R_LSR:
- case R_MSR:
- r = s->regs[addr];
- break;
- case R_IER:
- case R_LCR:
- case R_MCR:
- case R_DIV:
- error_report("lm32_uart: read access to write only register 0x"
- TARGET_FMT_plx, addr << 2);
- break;
- default:
- error_report("lm32_uart: read access to unknown register 0x"
- TARGET_FMT_plx, addr << 2);
- break;
- }
-
- trace_lm32_uart_memory_read(addr << 2, r);
- return r;
-}
-
-static void uart_write(void *opaque, hwaddr addr,
- uint64_t value, unsigned size)
-{
- LM32UartState *s = opaque;
- unsigned char ch = value;
-
- trace_lm32_uart_memory_write(addr, value);
-
- addr >>= 2;
- switch (addr) {
- case R_RXTX:
- /* XXX this blocks entire thread. Rewrite to use
- * qemu_chr_fe_write and background I/O callbacks */
- qemu_chr_fe_write_all(&s->chr, &ch, 1);
- break;
- case R_IER:
- case R_LCR:
- case R_MCR:
- case R_DIV:
- s->regs[addr] = value;
- break;
- case R_IIR:
- case R_LSR:
- case R_MSR:
- error_report("lm32_uart: write access to read only register 0x"
- TARGET_FMT_plx, addr << 2);
- break;
- default:
- error_report("lm32_uart: write access to unknown register 0x"
- TARGET_FMT_plx, addr << 2);
- break;
- }
- uart_update_irq(s);
-}
-
-static const MemoryRegionOps uart_ops = {
- .read = uart_read,
- .write = uart_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- },
-};
-
-static void uart_rx(void *opaque, const uint8_t *buf, int size)
-{
- LM32UartState *s = opaque;
-
- if (s->regs[R_LSR] & LSR_DR) {
- s->regs[R_LSR] |= LSR_OE;
- }
-
- s->regs[R_LSR] |= LSR_DR;
- s->regs[R_RXTX] = *buf;
-
- uart_update_irq(s);
-}
-
-static int uart_can_rx(void *opaque)
-{
- LM32UartState *s = opaque;
-
- return !(s->regs[R_LSR] & LSR_DR);
-}
-
-static void uart_event(void *opaque, QEMUChrEvent event)
-{
-}
-
-static void uart_reset(DeviceState *d)
-{
- LM32UartState *s = LM32_UART(d);
- int i;
-
- for (i = 0; i < R_MAX; i++) {
- s->regs[i] = 0;
- }
-
- /* defaults */
- s->regs[R_LSR] = LSR_THRE | LSR_TEMT;
-}
-
-static void lm32_uart_init(Object *obj)
-{
- LM32UartState *s = LM32_UART(obj);
- SysBusDevice *dev = SYS_BUS_DEVICE(obj);
-
- sysbus_init_irq(dev, &s->irq);
-
- memory_region_init_io(&s->iomem, obj, &uart_ops, s,
- "uart", R_MAX * 4);
- sysbus_init_mmio(dev, &s->iomem);
-}
-
-static void lm32_uart_realize(DeviceState *dev, Error **errp)
-{
- LM32UartState *s = LM32_UART(dev);
-
- qemu_chr_fe_set_handlers(&s->chr, uart_can_rx, uart_rx,
- uart_event, NULL, s, NULL, true);
-}
-
-static const VMStateDescription vmstate_lm32_uart = {
- .name = "lm32-uart",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32_ARRAY(regs, LM32UartState, R_MAX),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static Property lm32_uart_properties[] = {
- DEFINE_PROP_CHR("chardev", LM32UartState, chr),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void lm32_uart_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- dc->reset = uart_reset;
- dc->vmsd = &vmstate_lm32_uart;
- device_class_set_props(dc, lm32_uart_properties);
- dc->realize = lm32_uart_realize;
-}
-
-static const TypeInfo lm32_uart_info = {
- .name = TYPE_LM32_UART,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(LM32UartState),
- .instance_init = lm32_uart_init,
- .class_init = lm32_uart_class_init,
-};
-
-static void lm32_uart_register_types(void)
-{
- type_register_static(&lm32_uart_info);
-}
-
-type_init(lm32_uart_register_types)
generated by cgit v1.1 at 2024-12-25 13:50:33 +0000