This patch implements Allwinner A10 SPI controller emulation.
Only master-mode functionality is implemented.
Since U-Boot and Linux SPI drivers for Allwinner A10 perform only
byte-wide CPU access (no DMA) to the transmit and receive registers of
the peripheral, the emulated controller does not implement DMA control,
and supports only byte-wide access to transmit and receive registers
(half-word and word accesses will be treated as byte accesses).
Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
---
hw/ssi/Kconfig | 4 +
hw/ssi/allwinner-a10-spi.c | 561 +++++++++++++++++++++++++++++
hw/ssi/meson.build | 1 +
hw/ssi/trace-events | 10 +
include/hw/ssi/allwinner-a10-spi.h | 57 +++
5 files changed, 633 insertions(+)
create mode 100644 hw/ssi/allwinner-a10-spi.c
create mode 100644 include/hw/ssi/allwinner-a10-spi.h
diff --git a/hw/ssi/Kconfig b/hw/ssi/Kconfig
index 8d180de7cf..1bd56463c1 100644
--- a/hw/ssi/Kconfig
+++ b/hw/ssi/Kconfig
@@ -28,3 +28,7 @@ config BCM2835_SPI
config PNV_SPI
bool
select SSI
+
+config ALLWINNER_A10_SPI
+ bool
+ select SSI
diff --git a/hw/ssi/allwinner-a10-spi.c b/hw/ssi/allwinner-a10-spi.c
new file mode 100644
index 0000000000..3eb50b44ac
--- /dev/null
+++ b/hw/ssi/allwinner-a10-spi.c
@@ -0,0 +1,561 @@
+/*
+ * Allwinner SPI Bus Serial Interface Emulation
+ *
+ * Copyright (C) 2024 Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
+ *
+ * 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.
+ *
+ * This program 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 General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/irq.h"
+#include "hw/ssi/allwinner-a10-spi.h"
+#include "migration/vmstate.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "trace.h"
+
+/* Allwinner SPI memory map */
+#define SPI_RXDATA_REG 0x00 /* receive data register */
+#define SPI_TXDATA_REG 0x04 /* transmit data register */
+#define SPI_CTL_REG 0x08 /* control register */
+#define SPI_INTCTL_REG 0x0c /* interrupt control register */
+#define SPI_INT_STA_REG 0x10 /* interrupt status register */
+#define SPI_DMACTL_REG 0x14 /* DMA control register */
+#define SPI_WAIT_REG 0x18 /* wait clock counter register */
+#define SPI_CCTL_REG 0x1c /* clock rate control register */
+#define SPI_BC_REG 0x20 /* burst control register */
+#define SPI_TC_REG 0x24 /* transmit counter register */
+#define SPI_FIFO_STA_REG 0x28 /* FIFO status register */
+
+/* Data register */
+#define SPI_DATA_RESET 0
+
+/* Control register */
+#define SPI_CTL_SDC (1 << 19)
+#define SPI_CTL_TP_EN (1 << 18)
+#define SPI_CTL_SS_LEVEL (1 << 17)
+#define SPI_CTL_SS_CTRL (1 << 16)
+#define SPI_CTL_DHB (1 << 15)
+#define SPI_CTL_DDB (1 << 14)
+#define SPI_CTL_SS (3 << 12)
+#define SPI_CTL_SS_SHIFT 12
+#define SPI_CTL_RPSM (1 << 11)
+#define SPI_CTL_XCH (1 << 10)
+#define SPI_CTL_RF_RST (1 << 9)
+#define SPI_CTL_TF_RST (1 << 8)
+#define SPI_CTL_SSCTL (1 << 7)
+#define SPI_CTL_LMTF (1 << 6)
+#define SPI_CTL_DMAMC (1 << 5)
+#define SPI_CTL_SSPOL (1 << 4)
+#define SPI_CTL_POL (1 << 3)
+#define SPI_CTL_PHA (1 << 2)
+#define SPI_CTL_MODE (1 << 1)
+#define SPI_CTL_EN (1 << 0)
+#define SPI_CTL_MASK 0xFFFFFu
+#define SPI_CTL_RESET 0x0002001Cu
+
+/* Interrupt control register */
+#define SPI_INTCTL_SS_INT_EN (1 << 17)
+#define SPI_INTCTL_TX_INT_EN (1 << 16)
+#define SPI_INTCTL_TF_UR_INT_EN (1 << 14)
+#define SPI_INTCTL_TF_OF_INT_EN (1 << 13)
+#define SPI_INTCTL_TF_E34_INT_EN (1 << 12)
+#define SPI_INTCTL_TF_E14_INT_EN (1 << 11)
+#define SPI_INTCTL_TF_FL_INT_EN (1 << 10)
+#define SPI_INTCTL_TF_HALF_EMP_INT_EN (1 << 9)
+#define SPI_INTCTL_TF_EMP_INT_EN (1 << 8)
+#define SPI_INTCTL_RF_UR_INT_EN (1 << 6)
+#define SPI_INTCTL_RF_OF_INT_EN (1 << 5)
+#define SPI_INTCTL_RF_E34_INT_EN (1 << 4)
+#define SPI_INTCTL_RF_E14_INT_EN (1 << 3)
+#define SPI_INTCTL_RF_FU_INT_EN (1 << 2)
+#define SPI_INTCTL_RF_HALF_FU_INT_EN (1 << 1)
+#define SPI_INTCTL_RF_RDY_INT_EN (1 << 0)
+#define SPI_INTCTL_MASK 0x37F7Fu
+#define SPI_INTCTL_RESET 0
+
+/* Interrupt status register */
+#define SPI_INT_STA_INT_CBF (1 << 31)
+#define SPI_INT_STA_SSI (1 << 17)
+#define SPI_INT_STA_TC (1 << 16)
+#define SPI_INT_STA_TU (1 << 14)
+#define SPI_INT_STA_TO (1 << 13)
+#define SPI_INT_STA_TE34 (1 << 12)
+#define SPI_INT_STA_TE14 (1 << 11)
+#define SPI_INT_STA_TF (1 << 10)
+#define SPI_INT_STA_THE (1 << 9)
+#define SPI_INT_STA_TE (1 << 8)
+#define SPI_INT_STA_RU (1 << 6)
+#define SPI_INT_STA_RO (1 << 5)
+#define SPI_INT_STA_RF34 (1 << 4)
+#define SPI_INT_STA_RF14 (1 << 3)
+#define SPI_INT_STA_RF (1 << 2)
+#define SPI_INT_STA_RHF (1 << 1)
+#define SPI_INT_STA_RR (1 << 0)
+#define SPI_INT_STA_MASK 0x80037F7Fu
+#define SPI_INT_STA_RESET 0x00001B00u
+
+/* DMA control register - not implemented */
+#define SPI_DMACTL_RESET 0
+
+/* Wait clock register */
+#define SPI_WAIT_REG_WCC_MASK 0xFFFFu
+#define SPI_WAIT_RESET 0
+
+/* Clock control register - not implemented */
+#define SPI_CCTL_RESET 2
+
+/* Burst count register */
+#define SPI_BC_BC_MASK 0xFFFFFFu
+#define SPI_BC_RESET 0
+
+/* Transmi counter register */
+#define SPI_TC_WTC_MASK 0xFFFFFFu
+#define SPI_TC_RESET 0
+
+/* FIFO status register */
+#define SPI_FIFO_STA_CNT_MASK 0x7F
+#define SPI_FIFO_STA_TF_CNT_SHIFT 16
+#define SPI_FIFO_STA_RF_CNT_SHIFT 0
+#define SPI_FIFO_STA_RESET 0
+
+#define REG_INDEX(offset) (offset / sizeof(uint32_t))
+
+
+static const char *allwinner_a10_spi_get_regname(unsigned offset)
+{
+ switch (offset) {
+ case SPI_RXDATA_REG:
+ return "RXDATA";
+ case SPI_TXDATA_REG:
+ return "TXDATA";
+ case SPI_CTL_REG:
+ return "CTL";
+ case SPI_INTCTL_REG:
+ return "INTCTL";
+ case SPI_INT_STA_REG:
+ return "INT_STA";
+ case SPI_DMACTL_REG:
+ return "DMACTL";
+ case SPI_WAIT_REG:
+ return "WAIT";
+ case SPI_CCTL_REG:
+ return "CCTL";
+ case SPI_BC_REG:
+ return "BC";
+ case SPI_TC_REG:
+ return "TC";
+ case SPI_FIFO_STA_REG:
+ return "FIFO_STA";
+ default:
+ return "[?]";
+ }
+}
+
+static bool allwinner_a10_spi_is_enabled(AWA10SPIState *s)
+{
+ return s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_EN;
+}
+
+static void allwinner_a10_spi_txfifo_reset(AWA10SPIState *s)
+{
+ fifo8_reset(&s->tx_fifo);
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= (SPI_INT_STA_TE | SPI_INT_STA_TE14 |
+ SPI_INT_STA_THE | SPI_INT_STA_TE34);
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~(SPI_INT_STA_TU | SPI_INT_STA_TO);
+}
+
+static void allwinner_a10_spi_rxfifo_reset(AWA10SPIState *s)
+{
+ fifo8_reset(&s->rx_fifo);
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &=
+ ~(SPI_INT_STA_RU | SPI_INT_STA_RO | SPI_INT_STA_RF | SPI_INT_STA_RR |
+ SPI_INT_STA_RHF | SPI_INT_STA_RF14 | SPI_INT_STA_RF34);
+}
+
+static uint8_t allwinner_a10_spi_selected_channel(AWA10SPIState *s)
+{
+ return (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_SS) >> SPI_CTL_SS_SHIFT;
+}
+
+static void allwinner_a10_spi_reset_hold(Object *obj, ResetType type)
+{
+ AWA10SPIState *s = AW_A10_SPI(obj);
+
+ s->regs[REG_INDEX(SPI_RXDATA_REG)] = SPI_DATA_RESET;
+ s->regs[REG_INDEX(SPI_TXDATA_REG)] = SPI_DATA_RESET;
+ s->regs[REG_INDEX(SPI_CTL_REG)] = SPI_CTL_RESET;
+ s->regs[REG_INDEX(SPI_INTCTL_REG)] = SPI_INTCTL_RESET;
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] = SPI_INT_STA_RESET;
+ s->regs[REG_INDEX(SPI_DMACTL_REG)] = SPI_DMACTL_RESET;
+ s->regs[REG_INDEX(SPI_WAIT_REG)] = SPI_WAIT_RESET;
+ s->regs[REG_INDEX(SPI_CCTL_REG)] = SPI_CCTL_RESET;
+ s->regs[REG_INDEX(SPI_BC_REG)] = SPI_BC_RESET;
+ s->regs[REG_INDEX(SPI_TC_REG)] = SPI_TC_RESET;
+ s->regs[REG_INDEX(SPI_FIFO_STA_REG)] = SPI_FIFO_STA_RESET;
+
+ allwinner_a10_spi_txfifo_reset(s);
+ allwinner_a10_spi_rxfifo_reset(s);
+}
+
+static void allwinner_a10_spi_update_irq(AWA10SPIState *s)
+{
+ bool level;
+
+ if (fifo8_is_empty(&s->rx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_RR;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RR;
+ }
+
+ if (fifo8_num_used(&s->rx_fifo) >= (AW_A10_SPI_FIFO_SIZE >> 2)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RF14;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_RF14;
+ }
+
+ if (fifo8_num_used(&s->rx_fifo) >= (AW_A10_SPI_FIFO_SIZE >> 1)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RHF;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_RHF;
+ }
+
+ if (fifo8_num_free(&s->rx_fifo) <= (AW_A10_SPI_FIFO_SIZE >> 2)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RF34;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_RF34;
+ }
+
+ if (fifo8_is_full(&s->rx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RF;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_RF;
+ }
+
+ if (fifo8_is_empty(&s->tx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TE;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_TE;
+ }
+
+ if (fifo8_num_free(&s->tx_fifo) >= (AW_A10_SPI_FIFO_SIZE >> 2)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TE14;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_TE14;
+ }
+
+ if (fifo8_num_free(&s->tx_fifo) >= (AW_A10_SPI_FIFO_SIZE >> 1)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_THE;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_THE;
+ }
+
+ if (fifo8_num_used(&s->tx_fifo) <= (AW_A10_SPI_FIFO_SIZE >> 2)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TE34;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_TE34;
+ }
+
+ if (fifo8_is_full(&s->rx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TF;
+ } else {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~SPI_INT_STA_TF;
+ }
+
+ level = (s->regs[REG_INDEX(SPI_INT_STA_REG)] &
+ s->regs[REG_INDEX(SPI_INTCTL_REG)]) != 0;
+
+ qemu_set_irq(s->irq, level);
+
+ trace_allwinner_a10_spi_update_irq(level);
+}
+
+static void allwinner_a10_spi_flush_txfifo(AWA10SPIState *s)
+{
+ uint32_t burst_count = s->regs[REG_INDEX(SPI_BC_REG)];
+ uint32_t tx_burst = s->regs[REG_INDEX(SPI_TC_REG)];
+ trace_allwinner_a10_spi_burst_length(tx_burst);
+
+ trace_allwinner_a10_spi_flush_txfifo_begin(fifo8_num_used(&s->tx_fifo),
+ fifo8_num_used(&s->rx_fifo));
+
+ while (!fifo8_is_empty(&s->tx_fifo)) {
+ uint8_t tx = fifo8_pop(&s->tx_fifo);
+ uint8_t rx = 0;
+ bool fill_rx = true;
+
+ trace_allwinner_a10_spi_tx(tx);
+
+ /* Write one byte at a time */
+ rx = ssi_transfer(s->bus, tx);
+
+ trace_allwinner_a10_spi_rx(rx);
+
+ /* Check DHB here to determine if RX bytes should be stored */
+ if (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_DHB) {
+ /* Store rx bytes only after WTC transfers */
+ if (tx_burst > 0u) {
+ fill_rx = false;
+ tx_burst--;
+ }
+ }
+
+ if (fill_rx) {
+ if (fifo8_is_full(&s->rx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_RF;
+ } else {
+ fifo8_push(&s->rx_fifo, rx);
+ }
+ }
+
+ allwinner_a10_spi_update_irq(s);
+
+ burst_count--;
+
+ if (burst_count == 0) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TC;
+ s->regs[REG_INDEX(SPI_CTL_REG)] &= ~SPI_CTL_XCH;
+ break;
+ }
+ }
+
+ if (fifo8_is_empty(&s->tx_fifo)) {
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] |= SPI_INT_STA_TC;
+ s->regs[REG_INDEX(SPI_CTL_REG)] &= ~SPI_CTL_XCH;
+ }
+
+ trace_allwinner_a10_spi_flush_txfifo_end(fifo8_num_used(&s->tx_fifo),
+ fifo8_num_used(&s->rx_fifo));
+}
+
+static uint64_t allwinner_a10_spi_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ uint32_t value = 0;
+ AWA10SPIState *s = opaque;
+ uint32_t index = offset >> 2;
+
+ if (offset > SPI_FIFO_STA_REG) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "[%s]%s: Bad register at offset 0x%" HWADDR_PRIx "\n",
+ TYPE_AW_A10_SPI, __func__, offset);
+ return 0;
+ }
+
+ value = s->regs[index];
+
+ if (allwinner_a10_spi_is_enabled(s)) {
+ switch (offset) {
+ case SPI_RXDATA_REG:
+ if (fifo8_is_empty(&s->rx_fifo)) {
+ /* value is undefined */
+ value = 0xdeadbeef;
+ } else {
+ /* read from the RX FIFO */
+ value = fifo8_pop(&s->rx_fifo);
+ }
+ break;
+ case SPI_TXDATA_REG:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "[%s]%s: Trying to read from TX FIFO\n",
+ TYPE_AW_A10_SPI, __func__);
+
+ /* Reading from TXDATA gives 0 */
+ break;
+ case SPI_FIFO_STA_REG:
+ /* Read current tx/rx fifo data count */
+ value = fifo8_num_used(&s->tx_fifo) << SPI_FIFO_STA_TF_CNT_SHIFT |
+ fifo8_num_used(&s->rx_fifo) << SPI_FIFO_STA_RF_CNT_SHIFT;
+ break;
+ case SPI_CTL_REG:
+ case SPI_INTCTL_REG:
+ case SPI_INT_STA_REG:
+ case SPI_DMACTL_REG:
+ case SPI_WAIT_REG:
+ case SPI_CCTL_REG:
+ case SPI_BC_REG:
+ case SPI_TC_REG:
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: bad offset 0x%x\n", __func__,
+ (uint32_t)offset);
+ break;
+ }
+
+ allwinner_a10_spi_update_irq(s);
+ }
+ trace_allwinner_a10_spi_read(allwinner_a10_spi_get_regname(offset), value);
+
+ return value;
+}
+
+static bool allwinner_a10_spi_update_cs_level(AWA10SPIState *s, int cs_line_nr)
+{
+ if (cs_line_nr == allwinner_a10_spi_selected_channel(s)) {
+ return (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_SS_LEVEL) != 0;
+ } else {
+ return (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_SSPOL) != 0;
+ }
+}
+
+static void allwinner_a10_spi_write(void *opaque, hwaddr offset, uint64_t value,
+ unsigned size)
+{
+ AWA10SPIState *s = opaque;
+ uint32_t index = offset >> 2;
+ int i = 0;
+
+ if (offset > SPI_FIFO_STA_REG) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "[%s]%s: Bad register at offset 0x%" HWADDR_PRIx "\n",
+ TYPE_AW_A10_SPI, __func__, offset);
+ return;
+ }
+
+ trace_allwinner_a10_spi_write(allwinner_a10_spi_get_regname(offset),
+ (uint32_t)value);
+
+ if (!allwinner_a10_spi_is_enabled(s)) {
+ /* Block is disabled */
+ if (offset != SPI_CTL_REG) {
+ /* Ignore access */
+ return;
+ }
+ }
+
+ switch (offset) {
+ case SPI_RXDATA_REG:
+ qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Trying to write to RX FIFO\n",
+ TYPE_AW_A10_SPI, __func__);
+ break;
+ case SPI_TXDATA_REG:
+ if (fifo8_is_full(&s->tx_fifo)) {
+ /* Ignore writes if queue is full */
+ break;
+ }
+
+ fifo8_push(&s->tx_fifo, (uint8_t)value);
+
+ break;
+ case SPI_INT_STA_REG:
+ /* Handle W1C bits - everything except SPI_INT_STA_INT_CBF. */
+ value &= ~SPI_INT_STA_INT_CBF;
+ s->regs[REG_INDEX(SPI_INT_STA_REG)] &= ~(value & SPI_INT_STA_MASK);
+ break;
+ case SPI_CTL_REG:
+ s->regs[REG_INDEX(SPI_CTL_REG)] = value;
+
+ for (i = 0; i < AW_A10_SPI_CS_LINES_NR; i++) {
+ qemu_set_irq(
+ s->cs_lines[i],
+ allwinner_a10_spi_update_cs_level(s, i));
+ }
+
+ if (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_XCH) {
+ /* Request to start emitting */
+ allwinner_a10_spi_flush_txfifo(s);
+ }
+ if (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_TF_RST) {
+ allwinner_a10_spi_txfifo_reset(s);
+ s->regs[REG_INDEX(SPI_CTL_REG)] &= ~SPI_CTL_TF_RST;
+ }
+ if (s->regs[REG_INDEX(SPI_CTL_REG)] & SPI_CTL_RF_RST) {
+ allwinner_a10_spi_rxfifo_reset(s);
+ s->regs[REG_INDEX(SPI_CTL_REG)] &= ~SPI_CTL_RF_RST;
+ }
+ break;
+ case SPI_INTCTL_REG:
+ case SPI_DMACTL_REG:
+ case SPI_WAIT_REG:
+ case SPI_CCTL_REG:
+ case SPI_BC_REG:
+ case SPI_TC_REG:
+ case SPI_FIFO_STA_REG:
+ s->regs[index] = value;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: bad offset 0x%x\n", __func__,
+ (uint32_t)offset);
+ break;
+ }
+
+ allwinner_a10_spi_update_irq(s);
+}
+
+static const MemoryRegionOps allwinner_a10_spi_ops = {
+ .read = allwinner_a10_spi_read,
+ .write = allwinner_a10_spi_write,
+ .valid.min_access_size = 1,
+ .valid.max_access_size = 4,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static const VMStateDescription allwinner_a10_spi_vmstate = {
+ .name = TYPE_AW_A10_SPI,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (const VMStateField[]) {
+ VMSTATE_FIFO8(tx_fifo, AWA10SPIState),
+ VMSTATE_FIFO8(rx_fifo, AWA10SPIState),
+ VMSTATE_UINT32_ARRAY(regs, AWA10SPIState, AW_A10_SPI_REGS_NUM),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void allwinner_a10_spi_realize(DeviceState *dev, Error **errp)
+{
+ AWA10SPIState *s = AW_A10_SPI(dev);
+ int i = 0;
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_a10_spi_ops, s,
+ TYPE_AW_A10_SPI, AW_A10_SPI_IOSIZE);
+ sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
+
+ s->bus = ssi_create_bus(dev, "spi");
+ for (i = 0; i < AW_A10_SPI_CS_LINES_NR; i++) {
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->cs_lines[i]);
+ }
+ fifo8_create(&s->tx_fifo, AW_A10_SPI_FIFO_SIZE);
+ fifo8_create(&s->rx_fifo, AW_A10_SPI_FIFO_SIZE);
+}
+
+static void allwinner_a10_spi_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+
+ rc->phases.hold = allwinner_a10_spi_reset_hold;
+ dc->vmsd = &allwinner_a10_spi_vmstate;
+ dc->realize = allwinner_a10_spi_realize;
+ dc->desc = "Allwinner A10 SPI Controller";
+}
+
+static const TypeInfo allwinner_a10_spi_type_info = {
+ .name = TYPE_AW_A10_SPI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AWA10SPIState),
+ .class_init = allwinner_a10_spi_class_init,
+};
+
+static void allwinner_a10_spi_register_types(void)
+{
+ type_register_static(&allwinner_a10_spi_type_info);
+}
+
+type_init(allwinner_a10_spi_register_types)
diff --git a/hw/ssi/meson.build b/hw/ssi/meson.build
index b7ad7fca3b..0fb0b68617 100644
--- a/hw/ssi/meson.build
+++ b/hw/ssi/meson.build
@@ -1,3 +1,4 @@
+system_ss.add(when: 'CONFIG_ALLWINNER_A10_SPI', if_true: files('allwinner-a10-spi.c'))
system_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_smc.c'))
system_ss.add(when: 'CONFIG_MSF2', if_true: files('mss-spi.c'))
system_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_fiu.c', 'npcm_pspi.c'))
diff --git a/hw/ssi/trace-events b/hw/ssi/trace-events
index 089d269994..2f36cf96b8 100644
--- a/hw/ssi/trace-events
+++ b/hw/ssi/trace-events
@@ -53,3 +53,13 @@ pnv_spi_rx_read_N2frame(void) ""
pnv_spi_shift_rx(uint8_t byte, uint32_t index) "byte = 0x%2.2x into RDR from payload index %d"
pnv_spi_sequencer_stop_requested(const char* reason) "due to %s"
pnv_spi_RDR_match(const char* result) "%s"
+
+# allwinner_a10_spi.c
+allwinner_a10_spi_update_irq(uint32_t level) "IRQ level is %d"
+allwinner_a10_spi_flush_txfifo_begin(uint32_t tx, uint32_t rx) "Begin: TX Fifo Size = %d, RX Fifo Size = %d"
+allwinner_a10_spi_flush_txfifo_end(uint32_t tx, uint32_t rx) "End: TX Fifo Size = %d, RX Fifo Size = %d"
+allwinner_a10_spi_burst_length(uint32_t len) "Burst length = %d"
+allwinner_a10_spi_tx(uint8_t byte) "write 0x%02x"
+allwinner_a10_spi_rx(uint8_t byte) "read 0x%02x"
+allwinner_a10_spi_read(const char* regname, uint32_t value) "reg[%s] => 0x%08x"
+allwinner_a10_spi_write(const char* regname, uint32_t value) "reg[%s] <= 0x%08x"
diff --git a/include/hw/ssi/allwinner-a10-spi.h b/include/hw/ssi/allwinner-a10-spi.h
new file mode 100644
index 0000000000..da46e29a27
--- /dev/null
+++ b/include/hw/ssi/allwinner-a10-spi.h
@@ -0,0 +1,57 @@
+/*
+ * Allwinner SPI Bus Serial Interface registers definition
+ *
+ * Copyright (C) 2024 Strahinja Jankovic. <strahinja.p.jankovic@gmail.com>
+ *
+ * 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.
+ *
+ * This program 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 General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef ALLWINNER_A10_SPI_H
+#define ALLWINNER_A10_SPI_H
+
+#include "hw/ssi/ssi.h"
+#include "hw/sysbus.h"
+#include "qemu/fifo8.h"
+#include "qom/object.h"
+
+/** Size of register I/O address space used by SPI device */
+#define AW_A10_SPI_IOSIZE (0x1000)
+
+/** Total number of known registers */
+#define AW_A10_SPI_REGS_NUM (AW_A10_SPI_IOSIZE / sizeof(uint32_t))
+#define AW_A10_SPI_FIFO_SIZE (64)
+#define AW_A10_SPI_CS_LINES_NR (4)
+
+#define TYPE_AW_A10_SPI "allwinner.spi"
+OBJECT_DECLARE_SIMPLE_TYPE(AWA10SPIState, AW_A10_SPI)
+
+struct AWA10SPIState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion iomem;
+ SSIBus *bus;
+ qemu_irq irq;
+ qemu_irq cs_lines[AW_A10_SPI_CS_LINES_NR];
+
+ uint32_t regs[AW_A10_SPI_REGS_NUM];
+
+ Fifo8 rx_fifo;
+ Fifo8 tx_fifo;
+};
+
+#endif /* ALLWINNER_A10_SPI_H */
--
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