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-rw-r--r--hw/etraxfs_ser.c248
1 files changed, 0 insertions, 248 deletions
diff --git a/hw/etraxfs_ser.c b/hw/etraxfs_ser.c
deleted file mode 100644
index 7e24d34230..0000000000
--- a/hw/etraxfs_ser.c
+++ /dev/null
@@ -1,248 +0,0 @@
-/*
- * QEMU ETRAX System Emulator
- *
- * Copyright (c) 2007 Edgar E. Iglesias, Axis Communications AB.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "hw/sysbus.h"
-#include "char/char.h"
-#include "qemu/log.h"
-
-#define D(x)
-
-#define RW_TR_CTRL (0x00 / 4)
-#define RW_TR_DMA_EN (0x04 / 4)
-#define RW_REC_CTRL (0x08 / 4)
-#define RW_DOUT (0x1c / 4)
-#define RS_STAT_DIN (0x20 / 4)
-#define R_STAT_DIN (0x24 / 4)
-#define RW_INTR_MASK (0x2c / 4)
-#define RW_ACK_INTR (0x30 / 4)
-#define R_INTR (0x34 / 4)
-#define R_MASKED_INTR (0x38 / 4)
-#define R_MAX (0x3c / 4)
-
-#define STAT_DAV 16
-#define STAT_TR_IDLE 22
-#define STAT_TR_RDY 24
-
-struct etrax_serial
-{
- SysBusDevice busdev;
- MemoryRegion mmio;
- CharDriverState *chr;
- qemu_irq irq;
-
- int pending_tx;
-
- uint8_t rx_fifo[16];
- unsigned int rx_fifo_pos;
- unsigned int rx_fifo_len;
-
- /* Control registers. */
- uint32_t regs[R_MAX];
-};
-
-static void ser_update_irq(struct etrax_serial *s)
-{
-
- if (s->rx_fifo_len) {
- s->regs[R_INTR] |= 8;
- } else {
- s->regs[R_INTR] &= ~8;
- }
-
- s->regs[R_MASKED_INTR] = s->regs[R_INTR] & s->regs[RW_INTR_MASK];
- qemu_set_irq(s->irq, !!s->regs[R_MASKED_INTR]);
-}
-
-static uint64_t
-ser_read(void *opaque, hwaddr addr, unsigned int size)
-{
- struct etrax_serial *s = opaque;
- D(CPUCRISState *env = s->env);
- uint32_t r = 0;
-
- addr >>= 2;
- switch (addr)
- {
- case R_STAT_DIN:
- r = s->rx_fifo[(s->rx_fifo_pos - s->rx_fifo_len) & 15];
- if (s->rx_fifo_len) {
- r |= 1 << STAT_DAV;
- }
- r |= 1 << STAT_TR_RDY;
- r |= 1 << STAT_TR_IDLE;
- break;
- case RS_STAT_DIN:
- r = s->rx_fifo[(s->rx_fifo_pos - s->rx_fifo_len) & 15];
- if (s->rx_fifo_len) {
- r |= 1 << STAT_DAV;
- s->rx_fifo_len--;
- }
- r |= 1 << STAT_TR_RDY;
- r |= 1 << STAT_TR_IDLE;
- break;
- default:
- r = s->regs[addr];
- D(qemu_log("%s " TARGET_FMT_plx "=%x\n", __func__, addr, r));
- break;
- }
- return r;
-}
-
-static void
-ser_write(void *opaque, hwaddr addr,
- uint64_t val64, unsigned int size)
-{
- struct etrax_serial *s = opaque;
- uint32_t value = val64;
- unsigned char ch = val64;
- D(CPUCRISState *env = s->env);
-
- D(qemu_log("%s " TARGET_FMT_plx "=%x\n", __func__, addr, value));
- addr >>= 2;
- switch (addr)
- {
- case RW_DOUT:
- qemu_chr_fe_write(s->chr, &ch, 1);
- s->regs[R_INTR] |= 3;
- s->pending_tx = 1;
- s->regs[addr] = value;
- break;
- case RW_ACK_INTR:
- if (s->pending_tx) {
- value &= ~1;
- s->pending_tx = 0;
- D(qemu_log("fixedup value=%x r_intr=%x\n",
- value, s->regs[R_INTR]));
- }
- s->regs[addr] = value;
- s->regs[R_INTR] &= ~value;
- D(printf("r_intr=%x\n", s->regs[R_INTR]));
- break;
- default:
- s->regs[addr] = value;
- break;
- }
- ser_update_irq(s);
-}
-
-static const MemoryRegionOps ser_ops = {
- .read = ser_read,
- .write = ser_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4
- }
-};
-
-static void serial_receive(void *opaque, const uint8_t *buf, int size)
-{
- struct etrax_serial *s = opaque;
- int i;
-
- /* Got a byte. */
- if (s->rx_fifo_len >= 16) {
- qemu_log("WARNING: UART dropped char.\n");
- return;
- }
-
- for (i = 0; i < size; i++) {
- s->rx_fifo[s->rx_fifo_pos] = buf[i];
- s->rx_fifo_pos++;
- s->rx_fifo_pos &= 15;
- s->rx_fifo_len++;
- }
-
- ser_update_irq(s);
-}
-
-static int serial_can_receive(void *opaque)
-{
- struct etrax_serial *s = opaque;
- int r;
-
- /* Is the receiver enabled? */
- if (!(s->regs[RW_REC_CTRL] & (1 << 3))) {
- return 0;
- }
-
- r = sizeof(s->rx_fifo) - s->rx_fifo_len;
- return r;
-}
-
-static void serial_event(void *opaque, int event)
-{
-
-}
-
-static void etraxfs_ser_reset(DeviceState *d)
-{
- struct etrax_serial *s = container_of(d, typeof(*s), busdev.qdev);
-
- /* transmitter begins ready and idle. */
- s->regs[RS_STAT_DIN] |= (1 << STAT_TR_RDY);
- s->regs[RS_STAT_DIN] |= (1 << STAT_TR_IDLE);
-
- s->regs[RW_REC_CTRL] = 0x10000;
-
-}
-
-static int etraxfs_ser_init(SysBusDevice *dev)
-{
- struct etrax_serial *s = FROM_SYSBUS(typeof (*s), dev);
-
- sysbus_init_irq(dev, &s->irq);
- memory_region_init_io(&s->mmio, &ser_ops, s, "etraxfs-serial", R_MAX * 4);
- sysbus_init_mmio(dev, &s->mmio);
-
- s->chr = qemu_char_get_next_serial();
- if (s->chr)
- qemu_chr_add_handlers(s->chr,
- serial_can_receive, serial_receive,
- serial_event, s);
- return 0;
-}
-
-static void etraxfs_ser_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
-
- k->init = etraxfs_ser_init;
- dc->reset = etraxfs_ser_reset;
-}
-
-static const TypeInfo etraxfs_ser_info = {
- .name = "etraxfs,serial",
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(struct etrax_serial),
- .class_init = etraxfs_ser_class_init,
-};
-
-static void etraxfs_serial_register_types(void)
-{
- type_register_static(&etraxfs_ser_info);
-}
-
-type_init(etraxfs_serial_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-25 00:41:59 +0000