summaryrefslogtreecommitdiffstats
path: root/qemu/hw/misc/zynq-xadc.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/hw/misc/zynq-xadc.c')
-rw-r--r--qemu/hw/misc/zynq-xadc.c303
1 files changed, 0 insertions, 303 deletions
diff --git a/qemu/hw/misc/zynq-xadc.c b/qemu/hw/misc/zynq-xadc.c
deleted file mode 100644
index 71fbccd79..000000000
--- a/qemu/hw/misc/zynq-xadc.c
+++ /dev/null
@@ -1,303 +0,0 @@
-/*
- * ADC registers for Xilinx Zynq Platform
- *
- * Copyright (c) 2015 Guenter Roeck
- * Based on hw/misc/zynq_slcr.c, written by Michal Simek
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "qemu/osdep.h"
-#include "hw/hw.h"
-#include "hw/misc/zynq-xadc.h"
-#include "qemu/timer.h"
-#include "sysemu/sysemu.h"
-
-enum {
- CFG = 0x000 / 4,
- INT_STS,
- INT_MASK,
- MSTS,
- CMDFIFO,
- RDFIFO,
- MCTL,
-};
-
-#define CFG_ENABLE BIT(31)
-#define CFG_CFIFOTH_SHIFT 20
-#define CFG_CFIFOTH_LENGTH 4
-#define CFG_DFIFOTH_SHIFT 16
-#define CFG_DFIFOTH_LENGTH 4
-#define CFG_WEDGE BIT(13)
-#define CFG_REDGE BIT(12)
-#define CFG_TCKRATE_SHIFT 8
-#define CFG_TCKRATE_LENGTH 2
-
-#define CFG_TCKRATE_DIV(x) (0x1 << (x - 1))
-
-#define CFG_IGAP_SHIFT 0
-#define CFG_IGAP_LENGTH 5
-
-#define INT_CFIFO_LTH BIT(9)
-#define INT_DFIFO_GTH BIT(8)
-#define INT_OT BIT(7)
-#define INT_ALM_SHIFT 0
-#define INT_ALM_LENGTH 7
-#define INT_ALM_MASK (((1 << INT_ALM_LENGTH) - 1) << INT_ALM_SHIFT)
-
-#define INT_ALL (INT_CFIFO_LTH | INT_DFIFO_GTH | INT_OT | INT_ALM_MASK)
-
-#define MSTS_CFIFO_LVL_SHIFT 16
-#define MSTS_CFIFO_LVL_LENGTH 4
-#define MSTS_DFIFO_LVL_SHIFT 12
-#define MSTS_DFIFO_LVL_LENGTH 4
-#define MSTS_CFIFOF BIT(11)
-#define MSTS_CFIFOE BIT(10)
-#define MSTS_DFIFOF BIT(9)
-#define MSTS_DFIFOE BIT(8)
-#define MSTS_OT BIT(7)
-#define MSTS_ALM_SHIFT 0
-#define MSTS_ALM_LENGTH 7
-
-#define MCTL_RESET BIT(4)
-
-#define CMD_NOP 0x00
-#define CMD_READ 0x01
-#define CMD_WRITE 0x02
-
-static void zynq_xadc_update_ints(ZynqXADCState *s)
-{
-
- /* We are fast, commands are actioned instantly so the CFIFO is always
- * empty (and below threshold).
- */
- s->regs[INT_STS] |= INT_CFIFO_LTH;
-
- if (s->xadc_dfifo_entries >
- extract32(s->regs[CFG], CFG_DFIFOTH_SHIFT, CFG_DFIFOTH_LENGTH)) {
- s->regs[INT_STS] |= INT_DFIFO_GTH;
- }
-
- qemu_set_irq(s->qemu_irq, !!(s->regs[INT_STS] & ~s->regs[INT_MASK]));
-}
-
-static void zynq_xadc_reset(DeviceState *d)
-{
- ZynqXADCState *s = ZYNQ_XADC(d);
-
- s->regs[CFG] = 0x14 << CFG_IGAP_SHIFT |
- CFG_TCKRATE_DIV(4) << CFG_TCKRATE_SHIFT | CFG_REDGE;
- s->regs[INT_STS] = INT_CFIFO_LTH;
- s->regs[INT_MASK] = 0xffffffff;
- s->regs[CMDFIFO] = 0;
- s->regs[RDFIFO] = 0;
- s->regs[MCTL] = MCTL_RESET;
-
- memset(s->xadc_regs, 0, sizeof(s->xadc_regs));
- memset(s->xadc_dfifo, 0, sizeof(s->xadc_dfifo));
- s->xadc_dfifo_entries = 0;
-
- zynq_xadc_update_ints(s);
-}
-
-static uint16_t xadc_pop_dfifo(ZynqXADCState *s)
-{
- uint16_t rv = s->xadc_dfifo[0];
- int i;
-
- if (s->xadc_dfifo_entries > 0) {
- s->xadc_dfifo_entries--;
- }
- for (i = 0; i < s->xadc_dfifo_entries; i++) {
- s->xadc_dfifo[i] = s->xadc_dfifo[i + 1];
- }
- s->xadc_dfifo[s->xadc_dfifo_entries] = 0;
- zynq_xadc_update_ints(s);
- return rv;
-}
-
-static void xadc_push_dfifo(ZynqXADCState *s, uint16_t regval)
-{
- if (s->xadc_dfifo_entries < ZYNQ_XADC_FIFO_DEPTH) {
- s->xadc_dfifo[s->xadc_dfifo_entries++] = s->xadc_read_reg_previous;
- }
- s->xadc_read_reg_previous = regval;
- zynq_xadc_update_ints(s);
-}
-
-static bool zynq_xadc_check_offset(hwaddr offset, bool rnw)
-{
- switch (offset) {
- case CFG:
- case INT_MASK:
- case INT_STS:
- case MCTL:
- return true;
- case RDFIFO:
- case MSTS:
- return rnw; /* read only */
- case CMDFIFO:
- return !rnw; /* write only */
- default:
- return false;
- }
-}
-
-static uint64_t zynq_xadc_read(void *opaque, hwaddr offset, unsigned size)
-{
- ZynqXADCState *s = opaque;
- int reg = offset / 4;
- uint32_t rv = 0;
-
- if (!zynq_xadc_check_offset(reg, true)) {
- qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Invalid read access to "
- "addr %" HWADDR_PRIx "\n", offset);
- return 0;
- }
-
- switch (reg) {
- case CFG:
- case INT_MASK:
- case INT_STS:
- case MCTL:
- rv = s->regs[reg];
- break;
- case MSTS:
- rv = MSTS_CFIFOE;
- rv |= s->xadc_dfifo_entries << MSTS_DFIFO_LVL_SHIFT;
- if (!s->xadc_dfifo_entries) {
- rv |= MSTS_DFIFOE;
- } else if (s->xadc_dfifo_entries == ZYNQ_XADC_FIFO_DEPTH) {
- rv |= MSTS_DFIFOF;
- }
- break;
- case RDFIFO:
- rv = xadc_pop_dfifo(s);
- break;
- }
- return rv;
-}
-
-static void zynq_xadc_write(void *opaque, hwaddr offset, uint64_t val,
- unsigned size)
-{
- ZynqXADCState *s = (ZynqXADCState *)opaque;
- int reg = offset / 4;
- int xadc_reg;
- int xadc_cmd;
- int xadc_data;
-
- if (!zynq_xadc_check_offset(reg, false)) {
- qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Invalid write access "
- "to addr %" HWADDR_PRIx "\n", offset);
- return;
- }
-
- switch (reg) {
- case CFG:
- s->regs[CFG] = val;
- break;
- case INT_STS:
- s->regs[INT_STS] &= ~val;
- break;
- case INT_MASK:
- s->regs[INT_MASK] = val & INT_ALL;
- break;
- case CMDFIFO:
- xadc_cmd = extract32(val, 26, 4);
- xadc_reg = extract32(val, 16, 10);
- xadc_data = extract32(val, 0, 16);
-
- if (s->regs[MCTL] & MCTL_RESET) {
- qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Sending command "
- "while comm channel held in reset: %" PRIx32 "\n",
- (uint32_t) val);
- break;
- }
-
- if (xadc_reg >= ZYNQ_XADC_NUM_ADC_REGS && xadc_cmd != CMD_NOP) {
- qemu_log_mask(LOG_GUEST_ERROR, "read/write op to invalid xadc "
- "reg 0x%x\n", xadc_reg);
- break;
- }
-
- switch (xadc_cmd) {
- case CMD_READ:
- xadc_push_dfifo(s, s->xadc_regs[xadc_reg]);
- break;
- case CMD_WRITE:
- s->xadc_regs[xadc_reg] = xadc_data;
- /* fallthrough */
- case CMD_NOP:
- xadc_push_dfifo(s, 0);
- break;
- }
- break;
- case MCTL:
- s->regs[MCTL] = val & 0x00fffeff;
- break;
- }
- zynq_xadc_update_ints(s);
-}
-
-static const MemoryRegionOps xadc_ops = {
- .read = zynq_xadc_read,
- .write = zynq_xadc_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static void zynq_xadc_init(Object *obj)
-{
- SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
- ZynqXADCState *s = ZYNQ_XADC(obj);
-
- memory_region_init_io(&s->iomem, obj, &xadc_ops, s, "zynq-xadc",
- ZYNQ_XADC_MMIO_SIZE);
- sysbus_init_mmio(sbd, &s->iomem);
- sysbus_init_irq(sbd, &s->qemu_irq);
-}
-
-static const VMStateDescription vmstate_zynq_xadc = {
- .name = "zynq-xadc",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32_ARRAY(regs, ZynqXADCState, ZYNQ_XADC_NUM_IO_REGS),
- VMSTATE_UINT16_ARRAY(xadc_regs, ZynqXADCState,
- ZYNQ_XADC_NUM_ADC_REGS),
- VMSTATE_UINT16_ARRAY(xadc_dfifo, ZynqXADCState,
- ZYNQ_XADC_FIFO_DEPTH),
- VMSTATE_UINT16(xadc_read_reg_previous, ZynqXADCState),
- VMSTATE_UINT16(xadc_dfifo_entries, ZynqXADCState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static void zynq_xadc_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- dc->vmsd = &vmstate_zynq_xadc;
- dc->reset = zynq_xadc_reset;
-}
-
-static const TypeInfo zynq_xadc_info = {
- .class_init = zynq_xadc_class_init,
- .name = TYPE_ZYNQ_XADC,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(ZynqXADCState),
- .instance_init = zynq_xadc_init,
-};
-
-static void zynq_xadc_register_types(void)
-{
- type_register_static(&zynq_xadc_info);
-}
-
-type_init(zynq_xadc_register_types)