aboutsummaryrefslogtreecommitdiff
path: root/hw/net/milkymist-minimac2.c
diff options
context:
space:
mode:
Diffstat (limited to 'hw/net/milkymist-minimac2.c')
-rw-r--r--hw/net/milkymist-minimac2.c547
1 files changed, 0 insertions, 547 deletions
diff --git a/hw/net/milkymist-minimac2.c b/hw/net/milkymist-minimac2.c
deleted file mode 100644
index 5826944..0000000
--- a/hw/net/milkymist-minimac2.c
+++ /dev/null
@@ -1,547 +0,0 @@
-/*
- * QEMU model of the Milkymist minimac2 block.
- *
- * Copyright (c) 2011 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:
- * not available yet
- *
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qom/object.h"
-#include "cpu.h" /* FIXME: why does this use TARGET_PAGE_ALIGN? */
-#include "hw/irq.h"
-#include "hw/qdev-properties.h"
-#include "hw/sysbus.h"
-#include "migration/vmstate.h"
-#include "trace.h"
-#include "net/net.h"
-#include "qemu/log.h"
-#include "qemu/module.h"
-#include "qemu/error-report.h"
-
-#include <zlib.h>
-
-enum {
- R_SETUP = 0,
- R_MDIO,
- R_STATE0,
- R_COUNT0,
- R_STATE1,
- R_COUNT1,
- R_TXCOUNT,
- R_MAX
-};
-
-enum {
- SETUP_PHY_RST = (1<<0),
-};
-
-enum {
- MDIO_DO = (1<<0),
- MDIO_DI = (1<<1),
- MDIO_OE = (1<<2),
- MDIO_CLK = (1<<3),
-};
-
-enum {
- STATE_EMPTY = 0,
- STATE_LOADED = 1,
- STATE_PENDING = 2,
-};
-
-enum {
- MDIO_OP_WRITE = 1,
- MDIO_OP_READ = 2,
-};
-
-enum mdio_state {
- MDIO_STATE_IDLE,
- MDIO_STATE_READING,
- MDIO_STATE_WRITING,
-};
-
-enum {
- R_PHY_ID1 = 2,
- R_PHY_ID2 = 3,
- R_PHY_MAX = 32
-};
-
-#define MINIMAC2_MTU 1530
-#define MINIMAC2_BUFFER_SIZE 2048
-
-struct MilkymistMinimac2MdioState {
- int last_clk;
- int count;
- uint32_t data;
- uint16_t data_out;
- int state;
-
- uint8_t phy_addr;
- uint8_t reg_addr;
-};
-typedef struct MilkymistMinimac2MdioState MilkymistMinimac2MdioState;
-
-#define TYPE_MILKYMIST_MINIMAC2 "milkymist-minimac2"
-OBJECT_DECLARE_SIMPLE_TYPE(MilkymistMinimac2State, MILKYMIST_MINIMAC2)
-
-struct MilkymistMinimac2State {
- SysBusDevice parent_obj;
-
- NICState *nic;
- NICConf conf;
- char *phy_model;
- MemoryRegion buffers;
- MemoryRegion regs_region;
-
- qemu_irq rx_irq;
- qemu_irq tx_irq;
-
- uint32_t regs[R_MAX];
-
- MilkymistMinimac2MdioState mdio;
-
- uint16_t phy_regs[R_PHY_MAX];
-
- uint8_t *rx0_buf;
- uint8_t *rx1_buf;
- uint8_t *tx_buf;
-};
-
-static const uint8_t preamble_sfd[] = {
- 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0xd5
-};
-
-static void minimac2_mdio_write_reg(MilkymistMinimac2State *s,
- uint8_t phy_addr, uint8_t reg_addr, uint16_t value)
-{
- trace_milkymist_minimac2_mdio_write(phy_addr, reg_addr, value);
-
- /* nop */
-}
-
-static uint16_t minimac2_mdio_read_reg(MilkymistMinimac2State *s,
- uint8_t phy_addr, uint8_t reg_addr)
-{
- uint16_t r = s->phy_regs[reg_addr];
-
- trace_milkymist_minimac2_mdio_read(phy_addr, reg_addr, r);
-
- return r;
-}
-
-static void minimac2_update_mdio(MilkymistMinimac2State *s)
-{
- MilkymistMinimac2MdioState *m = &s->mdio;
-
- /* detect rising clk edge */
- if (m->last_clk == 0 && (s->regs[R_MDIO] & MDIO_CLK)) {
- /* shift data in */
- int bit = ((s->regs[R_MDIO] & MDIO_DO)
- && (s->regs[R_MDIO] & MDIO_OE)) ? 1 : 0;
- m->data = (m->data << 1) | bit;
-
- /* check for sync */
- if (m->data == 0xffffffff) {
- m->count = 32;
- }
-
- if (m->count == 16) {
- uint8_t start = (m->data >> 14) & 0x3;
- uint8_t op = (m->data >> 12) & 0x3;
- uint8_t ta = (m->data) & 0x3;
-
- if (start == 1 && op == MDIO_OP_WRITE && ta == 2) {
- m->state = MDIO_STATE_WRITING;
- } else if (start == 1 && op == MDIO_OP_READ && (ta & 1) == 0) {
- m->state = MDIO_STATE_READING;
- } else {
- m->state = MDIO_STATE_IDLE;
- }
-
- if (m->state != MDIO_STATE_IDLE) {
- m->phy_addr = (m->data >> 7) & 0x1f;
- m->reg_addr = (m->data >> 2) & 0x1f;
- }
-
- if (m->state == MDIO_STATE_READING) {
- m->data_out = minimac2_mdio_read_reg(s, m->phy_addr,
- m->reg_addr);
- }
- }
-
- if (m->count < 16 && m->state == MDIO_STATE_READING) {
- int bit = (m->data_out & 0x8000) ? 1 : 0;
- m->data_out <<= 1;
-
- if (bit) {
- s->regs[R_MDIO] |= MDIO_DI;
- } else {
- s->regs[R_MDIO] &= ~MDIO_DI;
- }
- }
-
- if (m->count == 0 && m->state) {
- if (m->state == MDIO_STATE_WRITING) {
- uint16_t data = m->data & 0xffff;
- minimac2_mdio_write_reg(s, m->phy_addr, m->reg_addr, data);
- }
- m->state = MDIO_STATE_IDLE;
- }
- m->count--;
- }
-
- m->last_clk = (s->regs[R_MDIO] & MDIO_CLK) ? 1 : 0;
-}
-
-static size_t assemble_frame(uint8_t *buf, size_t size,
- const uint8_t *payload, size_t payload_size)
-{
- uint32_t crc;
-
- if (size < payload_size + 12) {
- qemu_log_mask(LOG_GUEST_ERROR, "milkymist_minimac2: frame too big "
- "(%zd bytes)\n", payload_size);
- return 0;
- }
-
- /* prepend preamble and sfd */
- memcpy(buf, preamble_sfd, 8);
-
- /* now copy the payload */
- memcpy(buf + 8, payload, payload_size);
-
- /* pad frame if needed */
- if (payload_size < 60) {
- memset(buf + payload_size + 8, 0, 60 - payload_size);
- payload_size = 60;
- }
-
- /* append fcs */
- crc = cpu_to_le32(crc32(0, buf + 8, payload_size));
- memcpy(buf + payload_size + 8, &crc, 4);
-
- return payload_size + 12;
-}
-
-static void minimac2_tx(MilkymistMinimac2State *s)
-{
- uint32_t txcount = s->regs[R_TXCOUNT];
- uint8_t *buf = s->tx_buf;
-
- if (txcount < 64) {
- error_report("milkymist_minimac2: ethernet frame too small (%u < %u)",
- txcount, 64);
- goto err;
- }
-
- if (txcount > MINIMAC2_MTU) {
- error_report("milkymist_minimac2: MTU exceeded (%u > %u)",
- txcount, MINIMAC2_MTU);
- goto err;
- }
-
- if (memcmp(buf, preamble_sfd, 8) != 0) {
- error_report("milkymist_minimac2: frame doesn't contain the preamble "
- "and/or the SFD (%02x %02x %02x %02x %02x %02x %02x %02x)",
- buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]);
- goto err;
- }
-
- trace_milkymist_minimac2_tx_frame(txcount - 12);
-
- /* send packet, skipping preamble and sfd */
- qemu_send_packet_raw(qemu_get_queue(s->nic), buf + 8, txcount - 12);
-
- s->regs[R_TXCOUNT] = 0;
-
-err:
- trace_milkymist_minimac2_pulse_irq_tx();
- qemu_irq_pulse(s->tx_irq);
-}
-
-static void update_rx_interrupt(MilkymistMinimac2State *s)
-{
- if (s->regs[R_STATE0] == STATE_PENDING
- || s->regs[R_STATE1] == STATE_PENDING) {
- trace_milkymist_minimac2_raise_irq_rx();
- qemu_irq_raise(s->rx_irq);
- } else {
- trace_milkymist_minimac2_lower_irq_rx();
- qemu_irq_lower(s->rx_irq);
- }
-}
-
-static ssize_t minimac2_rx(NetClientState *nc, const uint8_t *buf, size_t size)
-{
- MilkymistMinimac2State *s = qemu_get_nic_opaque(nc);
-
- uint32_t r_count;
- uint32_t r_state;
- uint8_t *rx_buf;
-
- size_t frame_size;
-
- trace_milkymist_minimac2_rx_frame(buf, size);
-
- /* choose appropriate slot */
- if (s->regs[R_STATE0] == STATE_LOADED) {
- r_count = R_COUNT0;
- r_state = R_STATE0;
- rx_buf = s->rx0_buf;
- } else if (s->regs[R_STATE1] == STATE_LOADED) {
- r_count = R_COUNT1;
- r_state = R_STATE1;
- rx_buf = s->rx1_buf;
- } else {
- return 0;
- }
-
- /* assemble frame */
- frame_size = assemble_frame(rx_buf, MINIMAC2_BUFFER_SIZE, buf, size);
-
- if (frame_size == 0) {
- return size;
- }
-
- trace_milkymist_minimac2_rx_transfer(rx_buf, frame_size);
-
- /* update slot */
- s->regs[r_count] = frame_size;
- s->regs[r_state] = STATE_PENDING;
-
- update_rx_interrupt(s);
-
- return size;
-}
-
-static uint64_t
-minimac2_read(void *opaque, hwaddr addr, unsigned size)
-{
- MilkymistMinimac2State *s = opaque;
- uint32_t r = 0;
-
- addr >>= 2;
- switch (addr) {
- case R_SETUP:
- case R_MDIO:
- case R_STATE0:
- case R_COUNT0:
- case R_STATE1:
- case R_COUNT1:
- case R_TXCOUNT:
- r = s->regs[addr];
- break;
-
- default:
- qemu_log_mask(LOG_GUEST_ERROR,
- "milkymist_minimac2_rd%d: 0x%" HWADDR_PRIx "\n",
- size, addr << 2);
- break;
- }
-
- trace_milkymist_minimac2_memory_read(addr << 2, r);
-
- return r;
-}
-
-static int minimac2_can_rx(MilkymistMinimac2State *s)
-{
- if (s->regs[R_STATE0] == STATE_LOADED) {
- return 1;
- }
- if (s->regs[R_STATE1] == STATE_LOADED) {
- return 1;
- }
-
- return 0;
-}
-
-static void
-minimac2_write(void *opaque, hwaddr addr, uint64_t value,
- unsigned size)
-{
- MilkymistMinimac2State *s = opaque;
-
- trace_milkymist_minimac2_memory_write(addr, value);
-
- addr >>= 2;
- switch (addr) {
- case R_MDIO:
- {
- /* MDIO_DI is read only */
- int mdio_di = (s->regs[R_MDIO] & MDIO_DI);
- s->regs[R_MDIO] = value;
- if (mdio_di) {
- s->regs[R_MDIO] |= mdio_di;
- } else {
- s->regs[R_MDIO] &= ~mdio_di;
- }
-
- minimac2_update_mdio(s);
- } break;
- case R_TXCOUNT:
- s->regs[addr] = value;
- if (value > 0) {
- minimac2_tx(s);
- }
- break;
- case R_STATE0:
- case R_STATE1:
- s->regs[addr] = value;
- update_rx_interrupt(s);
- if (minimac2_can_rx(s)) {
- qemu_flush_queued_packets(qemu_get_queue(s->nic));
- }
- break;
- case R_SETUP:
- case R_COUNT0:
- case R_COUNT1:
- s->regs[addr] = value;
- break;
-
- default:
- qemu_log_mask(LOG_GUEST_ERROR,
- "milkymist_minimac2_wr%d: 0x%" HWADDR_PRIx
- " = 0x%" PRIx64 "\n",
- size, addr << 2, value);
- break;
- }
-}
-
-static const MemoryRegionOps minimac2_ops = {
- .read = minimac2_read,
- .write = minimac2_write,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- },
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static void milkymist_minimac2_reset(DeviceState *d)
-{
- MilkymistMinimac2State *s = MILKYMIST_MINIMAC2(d);
- int i;
-
- for (i = 0; i < R_MAX; i++) {
- s->regs[i] = 0;
- }
- for (i = 0; i < R_PHY_MAX; i++) {
- s->phy_regs[i] = 0;
- }
-
- /* defaults */
- s->phy_regs[R_PHY_ID1] = 0x0022; /* Micrel KSZ8001L */
- s->phy_regs[R_PHY_ID2] = 0x161a;
-}
-
-static NetClientInfo net_milkymist_minimac2_info = {
- .type = NET_CLIENT_DRIVER_NIC,
- .size = sizeof(NICState),
- .receive = minimac2_rx,
-};
-
-static void milkymist_minimac2_realize(DeviceState *dev, Error **errp)
-{
- SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
- MilkymistMinimac2State *s = MILKYMIST_MINIMAC2(dev);
- size_t buffers_size = TARGET_PAGE_ALIGN(3 * MINIMAC2_BUFFER_SIZE);
-
- sysbus_init_irq(sbd, &s->rx_irq);
- sysbus_init_irq(sbd, &s->tx_irq);
-
- memory_region_init_io(&s->regs_region, OBJECT(dev), &minimac2_ops, s,
- "milkymist-minimac2", R_MAX * 4);
- sysbus_init_mmio(sbd, &s->regs_region);
-
- /* register buffers memory */
- memory_region_init_ram_nomigrate(&s->buffers, OBJECT(dev), "milkymist-minimac2.buffers",
- buffers_size, &error_fatal);
- vmstate_register_ram_global(&s->buffers);
- s->rx0_buf = memory_region_get_ram_ptr(&s->buffers);
- s->rx1_buf = s->rx0_buf + MINIMAC2_BUFFER_SIZE;
- s->tx_buf = s->rx1_buf + MINIMAC2_BUFFER_SIZE;
-
- sysbus_init_mmio(sbd, &s->buffers);
-
- qemu_macaddr_default_if_unset(&s->conf.macaddr);
- s->nic = qemu_new_nic(&net_milkymist_minimac2_info, &s->conf,
- object_get_typename(OBJECT(dev)), dev->id, s);
- qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
-}
-
-static const VMStateDescription vmstate_milkymist_minimac2_mdio = {
- .name = "milkymist-minimac2-mdio",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_INT32(last_clk, MilkymistMinimac2MdioState),
- VMSTATE_INT32(count, MilkymistMinimac2MdioState),
- VMSTATE_UINT32(data, MilkymistMinimac2MdioState),
- VMSTATE_UINT16(data_out, MilkymistMinimac2MdioState),
- VMSTATE_INT32(state, MilkymistMinimac2MdioState),
- VMSTATE_UINT8(phy_addr, MilkymistMinimac2MdioState),
- VMSTATE_UINT8(reg_addr, MilkymistMinimac2MdioState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static const VMStateDescription vmstate_milkymist_minimac2 = {
- .name = "milkymist-minimac2",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32_ARRAY(regs, MilkymistMinimac2State, R_MAX),
- VMSTATE_UINT16_ARRAY(phy_regs, MilkymistMinimac2State, R_PHY_MAX),
- VMSTATE_STRUCT(mdio, MilkymistMinimac2State, 0,
- vmstate_milkymist_minimac2_mdio, MilkymistMinimac2MdioState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static Property milkymist_minimac2_properties[] = {
- DEFINE_NIC_PROPERTIES(MilkymistMinimac2State, conf),
- DEFINE_PROP_STRING("phy_model", MilkymistMinimac2State, phy_model),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void milkymist_minimac2_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- dc->realize = milkymist_minimac2_realize;
- dc->reset = milkymist_minimac2_reset;
- dc->vmsd = &vmstate_milkymist_minimac2;
- device_class_set_props(dc, milkymist_minimac2_properties);
-}
-
-static const TypeInfo milkymist_minimac2_info = {
- .name = TYPE_MILKYMIST_MINIMAC2,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(MilkymistMinimac2State),
- .class_init = milkymist_minimac2_class_init,
-};
-
-static void milkymist_minimac2_register_types(void)
-{
- type_register_static(&milkymist_minimac2_info);
-}
-
-type_init(milkymist_minimac2_register_types)
generated by cgit v1.1 at 2024-12-24 03:36:21 +0000