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-rw-r--r--hw/sd/milkymist-memcard.c335
1 files changed, 0 insertions, 335 deletions
diff --git a/hw/sd/milkymist-memcard.c b/hw/sd/milkymist-memcard.c
deleted file mode 100644
index a1235aa..0000000
--- a/hw/sd/milkymist-memcard.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/*
- * QEMU model of the Milkymist SD Card Controller.
- *
- * 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://milkymist.walle.cc/socdoc/memcard.pdf
- */
-
-#include "qemu/osdep.h"
-#include "qemu/log.h"
-#include "qemu/module.h"
-#include "hw/sysbus.h"
-#include "migration/vmstate.h"
-#include "trace.h"
-#include "qapi/error.h"
-#include "sysemu/block-backend.h"
-#include "sysemu/blockdev.h"
-#include "hw/qdev-properties.h"
-#include "hw/sd/sd.h"
-#include "qom/object.h"
-
-enum {
- ENABLE_CMD_TX = (1<<0),
- ENABLE_CMD_RX = (1<<1),
- ENABLE_DAT_TX = (1<<2),
- ENABLE_DAT_RX = (1<<3),
-};
-
-enum {
- PENDING_CMD_TX = (1<<0),
- PENDING_CMD_RX = (1<<1),
- PENDING_DAT_TX = (1<<2),
- PENDING_DAT_RX = (1<<3),
-};
-
-enum {
- START_CMD_TX = (1<<0),
- START_DAT_RX = (1<<1),
-};
-
-enum {
- R_CLK2XDIV = 0,
- R_ENABLE,
- R_PENDING,
- R_START,
- R_CMD,
- R_DAT,
- R_MAX
-};
-
-#define TYPE_MILKYMIST_MEMCARD "milkymist-memcard"
-OBJECT_DECLARE_SIMPLE_TYPE(MilkymistMemcardState, MILKYMIST_MEMCARD)
-
-#define TYPE_MILKYMIST_SDBUS "milkymist-sdbus"
-
-struct MilkymistMemcardState {
- SysBusDevice parent_obj;
-
- MemoryRegion regs_region;
- SDBus sdbus;
-
- int command_write_ptr;
- int response_read_ptr;
- int response_len;
- int ignore_next_cmd;
- int enabled;
- uint8_t command[6];
- uint8_t response[17];
- uint32_t regs[R_MAX];
-};
-
-static void update_pending_bits(MilkymistMemcardState *s)
-{
- /* transmits are instantaneous, thus tx pending bits are never set */
- s->regs[R_PENDING] = 0;
- /* if rx is enabled the corresponding pending bits are always set */
- if (s->regs[R_ENABLE] & ENABLE_CMD_RX) {
- s->regs[R_PENDING] |= PENDING_CMD_RX;
- }
- if (s->regs[R_ENABLE] & ENABLE_DAT_RX) {
- s->regs[R_PENDING] |= PENDING_DAT_RX;
- }
-}
-
-static void memcard_sd_command(MilkymistMemcardState *s)
-{
- SDRequest req;
-
- req.cmd = s->command[0] & 0x3f;
- req.arg = ldl_be_p(s->command + 1);
- req.crc = s->command[5];
-
- s->response[0] = req.cmd;
- s->response_len = sdbus_do_command(&s->sdbus, &req, s->response + 1);
- s->response_read_ptr = 0;
-
- if (s->response_len == 16) {
- /* R2 response */
- s->response[0] = 0x3f;
- s->response_len += 1;
- } else if (s->response_len == 4) {
- /* no crc calculation, insert dummy byte */
- s->response[5] = 0;
- s->response_len += 2;
- }
-
- if (req.cmd == 0) {
- /* next write is a dummy byte to clock the initialization of the sd
- * card */
- s->ignore_next_cmd = 1;
- }
-}
-
-static uint64_t memcard_read(void *opaque, hwaddr addr,
- unsigned size)
-{
- MilkymistMemcardState *s = opaque;
- uint32_t r = 0;
-
- addr >>= 2;
- switch (addr) {
- case R_CMD:
- if (!s->enabled) {
- r = 0xff;
- } else {
- r = s->response[s->response_read_ptr++];
- if (s->response_read_ptr > s->response_len) {
- qemu_log_mask(LOG_GUEST_ERROR, "milkymist_memcard: "
- "read more cmd bytes than available: clipping\n");
- s->response_read_ptr = 0;
- }
- }
- break;
- case R_DAT:
- if (!s->enabled) {
- r = 0xffffffff;
- } else {
- sdbus_read_data(&s->sdbus, &r, sizeof(r));
- be32_to_cpus(&r);
- }
- break;
- case R_CLK2XDIV:
- case R_ENABLE:
- case R_PENDING:
- case R_START:
- r = s->regs[addr];
- break;
-
- default:
- qemu_log_mask(LOG_UNIMP, "milkymist_memcard: "
- "read access to unknown register 0x%" HWADDR_PRIx "\n",
- addr << 2);
- break;
- }
-
- trace_milkymist_memcard_memory_read(addr << 2, r);
-
- return r;
-}
-
-static void memcard_write(void *opaque, hwaddr addr, uint64_t value,
- unsigned size)
-{
- MilkymistMemcardState *s = opaque;
- uint32_t val32;
-
- trace_milkymist_memcard_memory_write(addr, value);
-
- addr >>= 2;
- switch (addr) {
- case R_PENDING:
- /* clear rx pending bits */
- s->regs[R_PENDING] &= ~(value & (PENDING_CMD_RX | PENDING_DAT_RX));
- update_pending_bits(s);
- break;
- case R_CMD:
- if (!s->enabled) {
- break;
- }
- if (s->ignore_next_cmd) {
- s->ignore_next_cmd = 0;
- break;
- }
- s->command[s->command_write_ptr] = value & 0xff;
- s->command_write_ptr = (s->command_write_ptr + 1) % 6;
- if (s->command_write_ptr == 0) {
- memcard_sd_command(s);
- }
- break;
- case R_DAT:
- if (!s->enabled) {
- break;
- }
- val32 = cpu_to_be32(value);
- sdbus_write_data(&s->sdbus, &val32, sizeof(val32));
- break;
- case R_ENABLE:
- s->regs[addr] = value;
- update_pending_bits(s);
- break;
- case R_CLK2XDIV:
- case R_START:
- s->regs[addr] = value;
- break;
-
- default:
- qemu_log_mask(LOG_UNIMP, "milkymist_memcard: "
- "write access to unknown register 0x%" HWADDR_PRIx " "
- "(value 0x%" PRIx64 ")\n", addr << 2, value);
- break;
- }
-}
-
-static const MemoryRegionOps memcard_mmio_ops = {
- .read = memcard_read,
- .write = memcard_write,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- },
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static void milkymist_memcard_reset(DeviceState *d)
-{
- MilkymistMemcardState *s = MILKYMIST_MEMCARD(d);
- int i;
-
- s->command_write_ptr = 0;
- s->response_read_ptr = 0;
- s->response_len = 0;
-
- for (i = 0; i < R_MAX; i++) {
- s->regs[i] = 0;
- }
-}
-
-static void milkymist_memcard_set_readonly(DeviceState *dev, bool level)
-{
- qemu_log_mask(LOG_UNIMP,
- "milkymist_memcard: read-only mode not supported\n");
-}
-
-static void milkymist_memcard_set_inserted(DeviceState *dev, bool level)
-{
- MilkymistMemcardState *s = MILKYMIST_MEMCARD(dev);
-
- s->enabled = !!level;
-}
-
-static void milkymist_memcard_init(Object *obj)
-{
- MilkymistMemcardState *s = MILKYMIST_MEMCARD(obj);
- SysBusDevice *dev = SYS_BUS_DEVICE(obj);
-
- memory_region_init_io(&s->regs_region, OBJECT(s), &memcard_mmio_ops, s,
- "milkymist-memcard", R_MAX * 4);
- sysbus_init_mmio(dev, &s->regs_region);
-
- qbus_create_inplace(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS,
- DEVICE(obj), "sd-bus");
-}
-
-static const VMStateDescription vmstate_milkymist_memcard = {
- .name = "milkymist-memcard",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_INT32(command_write_ptr, MilkymistMemcardState),
- VMSTATE_INT32(response_read_ptr, MilkymistMemcardState),
- VMSTATE_INT32(response_len, MilkymistMemcardState),
- VMSTATE_INT32(ignore_next_cmd, MilkymistMemcardState),
- VMSTATE_INT32(enabled, MilkymistMemcardState),
- VMSTATE_UINT8_ARRAY(command, MilkymistMemcardState, 6),
- VMSTATE_UINT8_ARRAY(response, MilkymistMemcardState, 17),
- VMSTATE_UINT32_ARRAY(regs, MilkymistMemcardState, R_MAX),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static void milkymist_memcard_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- dc->reset = milkymist_memcard_reset;
- dc->vmsd = &vmstate_milkymist_memcard;
- /* Reason: output IRQs should be wired up */
- dc->user_creatable = false;
-}
-
-static const TypeInfo milkymist_memcard_info = {
- .name = TYPE_MILKYMIST_MEMCARD,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(MilkymistMemcardState),
- .instance_init = milkymist_memcard_init,
- .class_init = milkymist_memcard_class_init,
-};
-
-static void milkymist_sdbus_class_init(ObjectClass *klass, void *data)
-{
- SDBusClass *sbc = SD_BUS_CLASS(klass);
-
- sbc->set_inserted = milkymist_memcard_set_inserted;
- sbc->set_readonly = milkymist_memcard_set_readonly;
-}
-
-static const TypeInfo milkymist_sdbus_info = {
- .name = TYPE_MILKYMIST_SDBUS,
- .parent = TYPE_SD_BUS,
- .instance_size = sizeof(SDBus),
- .class_init = milkymist_sdbus_class_init,
-};
-
-static void milkymist_memcard_register_types(void)
-{
- type_register_static(&milkymist_memcard_info);
- type_register_static(&milkymist_sdbus_info);
-}
-
-type_init(milkymist_memcard_register_types)
generated by cgit v1.1 at 2024-12-24 03:00:57 +0000