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qemu/hw/i2c/aspeed_i2c.c
Cédric Le Goater ce6c368d96 aspeed/i2c: Clean up local variable shadowing 
Remove superfluous local 'data' variable and use the one define at the
top of the routine. This fixes :

  ../hw/i2c/aspeed_i2c.c: In function ‘aspeed_i2c_bus_recv’:
  ../hw/i2c/aspeed_i2c.c:315:17: warning: declaration of ‘data’ shadows a previous local [-Wshadow=compatible-local]
    315 |         uint8_t data;
        |                 ^~~~
  ../hw/i2c/aspeed_i2c.c:288:13: note: shadowed declaration is here
    288 |     uint8_t data;
        |             ^~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230922155924.1172019-2-clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2023-09-29 10:07:19 +02:00

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/*
* ARM Aspeed I2C controller
*
* Copyright (C) 2016 IBM Corp.
*
* 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/>.
*
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qemu/cutils.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/i2c/aspeed_i2c.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "hw/registerfields.h"
#include "trace.h"
/* Enable SLAVE_ADDR_RX_MATCH always */
#define R_I2CD_INTR_STS_ALWAYS_ENABLE R_I2CD_INTR_STS_SLAVE_ADDR_RX_MATCH_MASK
static inline void aspeed_i2c_bus_raise_interrupt(AspeedI2CBus *bus)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
uint32_t intr_ctrl_reg = aspeed_i2c_bus_intr_ctrl_offset(bus);
uint32_t intr_ctrl_mask = bus->regs[intr_ctrl_reg] |
R_I2CD_INTR_STS_ALWAYS_ENABLE;
bool raise_irq;
if (trace_event_get_state_backends(TRACE_ASPEED_I2C_BUS_RAISE_INTERRUPT)) {
g_autofree char *buf = g_strdup_printf("%s%s%s%s%s%s%s",
aspeed_i2c_bus_pkt_mode_en(bus) &&
ARRAY_FIELD_EX32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE) ?
"pktdone|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, TX_NAK) ?
"nak|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, TX_ACK) ?
"ack|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, RX_DONE) ?
"done|" : "",
ARRAY_FIELD_EX32(bus->regs, I2CD_INTR_STS, SLAVE_ADDR_RX_MATCH) ?
"slave-match|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, NORMAL_STOP) ?
"stop|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, ABNORMAL) ?
"abnormal" : "");
trace_aspeed_i2c_bus_raise_interrupt(bus->regs[reg_intr_sts], buf);
}
raise_irq = bus->regs[reg_intr_sts] & intr_ctrl_mask ;
/* In packet mode we don't mask off INTR_STS */
if (!aspeed_i2c_bus_pkt_mode_en(bus)) {
bus->regs[reg_intr_sts] &= intr_ctrl_mask;
}
if (raise_irq) {
bus->controller->intr_status |= 1 << bus->id;
qemu_irq_raise(aic->bus_get_irq(bus));
}
}
static inline void aspeed_i2c_bus_raise_slave_interrupt(AspeedI2CBus *bus)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
if (!bus->regs[R_I2CS_INTR_STS]) {
return;
}
bus->controller->intr_status |= 1 << bus->id;
qemu_irq_raise(aic->bus_get_irq(bus));
}
static uint64_t aspeed_i2c_bus_old_read(AspeedI2CBus *bus, hwaddr offset,
unsigned size)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
uint64_t value = bus->regs[offset / sizeof(*bus->regs)];
switch (offset) {
case A_I2CD_FUN_CTRL:
case A_I2CD_AC_TIMING1:
case A_I2CD_AC_TIMING2:
case A_I2CD_INTR_CTRL:
case A_I2CD_INTR_STS:
case A_I2CD_DEV_ADDR:
case A_I2CD_POOL_CTRL:
case A_I2CD_BYTE_BUF:
/* Value is already set, don't do anything. */
break;
case A_I2CD_CMD:
value = SHARED_FIELD_DP32(value, BUS_BUSY_STS, i2c_bus_busy(bus->bus));
break;
case A_I2CD_DMA_ADDR:
if (!aic->has_dma) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
value = -1;
}
break;
case A_I2CD_DMA_LEN:
if (!aic->has_dma) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
value = -1;
}
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset);
value = -1;
break;
}
trace_aspeed_i2c_bus_read(bus->id, offset, size, value);
return value;
}
static uint64_t aspeed_i2c_bus_new_read(AspeedI2CBus *bus, hwaddr offset,
unsigned size)
{
uint64_t value = bus->regs[offset / sizeof(*bus->regs)];
switch (offset) {
case A_I2CC_FUN_CTRL:
case A_I2CC_AC_TIMING:
case A_I2CC_POOL_CTRL:
case A_I2CM_INTR_CTRL:
case A_I2CM_INTR_STS:
case A_I2CC_MS_TXRX_BYTE_BUF:
case A_I2CM_DMA_LEN:
case A_I2CM_DMA_TX_ADDR:
case A_I2CM_DMA_RX_ADDR:
case A_I2CM_DMA_LEN_STS:
case A_I2CC_DMA_ADDR:
case A_I2CC_DMA_LEN:
case A_I2CS_DEV_ADDR:
case A_I2CS_DMA_RX_ADDR:
case A_I2CS_DMA_LEN:
case A_I2CS_CMD:
case A_I2CS_INTR_CTRL:
case A_I2CS_DMA_LEN_STS:
/* Value is already set, don't do anything. */
break;
case A_I2CS_INTR_STS:
break;
case A_I2CM_CMD:
value = SHARED_FIELD_DP32(value, BUS_BUSY_STS, i2c_bus_busy(bus->bus));
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset);
value = -1;
break;
}
trace_aspeed_i2c_bus_read(bus->id, offset, size, value);
return value;
}
static uint64_t aspeed_i2c_bus_read(void *opaque, hwaddr offset,
unsigned size)
{
AspeedI2CBus *bus = opaque;
if (aspeed_i2c_is_new_mode(bus->controller)) {
return aspeed_i2c_bus_new_read(bus, offset, size);
}
return aspeed_i2c_bus_old_read(bus, offset, size);
}
static void aspeed_i2c_set_state(AspeedI2CBus *bus, uint8_t state)
{
if (aspeed_i2c_is_new_mode(bus->controller)) {
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF, TX_STATE,
state);
} else {
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CD_CMD, TX_STATE, state);
}
}
static uint8_t aspeed_i2c_get_state(AspeedI2CBus *bus)
{
if (aspeed_i2c_is_new_mode(bus->controller)) {
return SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF,
TX_STATE);
}
return SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD, TX_STATE);
}
static int aspeed_i2c_dma_read(AspeedI2CBus *bus, uint8_t *data)
{
MemTxResult result;
AspeedI2CState *s = bus->controller;
uint32_t reg_dma_addr = aspeed_i2c_bus_dma_addr_offset(bus);
uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus);
result = address_space_read(&s->dram_as, bus->regs[reg_dma_addr],
MEMTXATTRS_UNSPECIFIED, data, 1);
if (result != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM read failed @%08x\n",
__func__, bus->regs[reg_dma_addr]);
return -1;
}
bus->regs[reg_dma_addr]++;
bus->regs[reg_dma_len]--;
return 0;
}
static int aspeed_i2c_bus_send(AspeedI2CBus *bus)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
int ret = -1;
int i;
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus);
uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus);
uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus);
int pool_tx_count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl,
TX_COUNT) + 1;
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) {
for (i = 0; i < pool_tx_count; i++) {
uint8_t *pool_base = aic->bus_pool_base(bus);
trace_aspeed_i2c_bus_send("BUF", i + 1, pool_tx_count,
pool_base[i]);
ret = i2c_send(bus->bus, pool_base[i]);
if (ret) {
break;
}
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, TX_BUFF_EN, 0);
} else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) {
/* In new mode, clear how many bytes we TXed */
if (aspeed_i2c_is_new_mode(bus->controller)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, TX_LEN, 0);
}
while (bus->regs[reg_dma_len]) {
uint8_t data;
aspeed_i2c_dma_read(bus, &data);
trace_aspeed_i2c_bus_send("DMA", bus->regs[reg_dma_len],
bus->regs[reg_dma_len], data);
ret = i2c_send(bus->bus, data);
if (ret) {
break;
}
/* In new mode, keep track of how many bytes we TXed */
if (aspeed_i2c_is_new_mode(bus->controller)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, TX_LEN,
ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN_STS,
TX_LEN) + 1);
}
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, TX_DMA_EN, 0);
} else {
trace_aspeed_i2c_bus_send("BYTE", 0, 1,
bus->regs[reg_byte_buf]);
ret = i2c_send(bus->bus, bus->regs[reg_byte_buf]);
}
return ret;
}
static void aspeed_i2c_bus_recv(AspeedI2CBus *bus)
{
AspeedI2CState *s = bus->controller;
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s);
uint8_t data;
int i;
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus);
uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus);
uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus);
uint32_t reg_dma_addr = aspeed_i2c_bus_dma_addr_offset(bus);
int pool_rx_count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl,
RX_SIZE) + 1;
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) {
uint8_t *pool_base = aic->bus_pool_base(bus);
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl,
BUF_ORGANIZATION)) {
pool_base += 16;
}
for (i = 0; i < pool_rx_count; i++) {
pool_base[i] = i2c_recv(bus->bus);
trace_aspeed_i2c_bus_recv("BUF", i + 1, pool_rx_count,
pool_base[i]);
}
/* Update RX count */
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_pool_ctrl, RX_COUNT, i & 0xff);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, RX_BUFF_EN, 0);
} else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN)) {
/* In new mode, clear how many bytes we RXed */
if (aspeed_i2c_is_new_mode(bus->controller)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, RX_LEN, 0);
}
while (bus->regs[reg_dma_len]) {
MemTxResult result;
data = i2c_recv(bus->bus);
trace_aspeed_i2c_bus_recv("DMA", bus->regs[reg_dma_len],
bus->regs[reg_dma_len], data);
result = address_space_write(&s->dram_as, bus->regs[reg_dma_addr],
MEMTXATTRS_UNSPECIFIED, &data, 1);
if (result != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: DRAM write failed @%08x\n",
__func__, bus->regs[reg_dma_addr]);
return;
}
bus->regs[reg_dma_addr]++;
bus->regs[reg_dma_len]--;
/* In new mode, keep track of how many bytes we RXed */
if (aspeed_i2c_is_new_mode(bus->controller)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, RX_LEN,
ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN_STS,
RX_LEN) + 1);
}
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, RX_DMA_EN, 0);
} else {
data = i2c_recv(bus->bus);
trace_aspeed_i2c_bus_recv("BYTE", 1, 1, bus->regs[reg_byte_buf]);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, data);
}
}
static void aspeed_i2c_handle_rx_cmd(AspeedI2CBus *bus)
{
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
aspeed_i2c_set_state(bus, I2CD_MRXD);
aspeed_i2c_bus_recv(bus);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1);
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST)) {
i2c_nack(bus->bus);
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_RX_CMD, 0);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_S_RX_CMD_LAST, 0);
aspeed_i2c_set_state(bus, I2CD_MACTIVE);
}
static uint8_t aspeed_i2c_get_addr(AspeedI2CBus *bus)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus);
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
if (aspeed_i2c_bus_pkt_mode_en(bus)) {
return (ARRAY_FIELD_EX32(bus->regs, I2CM_CMD, PKT_DEV_ADDR) << 1) |
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD);
}
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) {
uint8_t *pool_base = aic->bus_pool_base(bus);
return pool_base[0];
} else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) {
uint8_t data;
aspeed_i2c_dma_read(bus, &data);
return data;
} else {
return bus->regs[reg_byte_buf];
}
}
static bool aspeed_i2c_check_sram(AspeedI2CBus *bus)
{
AspeedI2CState *s = bus->controller;
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s);
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
bool dma_en = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN);
if (!aic->check_sram) {
return true;
}
/*
* AST2500: SRAM must be enabled before using the Buffer Pool or
* DMA mode.
*/
if (!FIELD_EX32(s->ctrl_global, I2C_CTRL_GLOBAL, SRAM_EN) && dma_en) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: SRAM is not enabled\n", __func__);
return false;
}
return true;
}
static void aspeed_i2c_bus_cmd_dump(AspeedI2CBus *bus)
{
g_autofree char *cmd_flags = NULL;
uint32_t count;
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
uint32_t reg_pool_ctrl = aspeed_i2c_bus_pool_ctrl_offset(bus);
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus);
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) {
count = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, TX_COUNT) + 1;
} else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN)) {
count = bus->regs[reg_dma_len];
} else { /* BYTE mode */
count = 1;
}
cmd_flags = g_strdup_printf("%s%s%s%s%s%s%s%s%s",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_START_CMD) ? "start|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN) ? "rxdma|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN) ? "txdma|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN) ? "rxbuf|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN) ? "txbuf|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_TX_CMD) ? "tx|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD) ? "rx|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST) ? "last|" : "",
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_STOP_CMD) ? "stop|" : "");
trace_aspeed_i2c_bus_cmd(bus->regs[reg_cmd], cmd_flags, count,
bus->regs[reg_intr_sts]);
}
/*
* The state machine needs some refinement. It is only used to track
* invalid STOP commands for the moment.
*/
static void aspeed_i2c_bus_handle_cmd(AspeedI2CBus *bus, uint64_t value)
{
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
uint32_t reg_cmd = aspeed_i2c_bus_cmd_offset(bus);
uint32_t reg_dma_len = aspeed_i2c_bus_dma_len_offset(bus);
if (!aspeed_i2c_check_sram(bus)) {
return;
}
if (trace_event_get_state_backends(TRACE_ASPEED_I2C_BUS_CMD)) {
aspeed_i2c_bus_cmd_dump(bus);
}
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_START_CMD)) {
uint8_t state = aspeed_i2c_get_state(bus) & I2CD_MACTIVE ?
I2CD_MSTARTR : I2CD_MSTART;
uint8_t addr;
aspeed_i2c_set_state(bus, state);
addr = aspeed_i2c_get_addr(bus);
if (i2c_start_transfer(bus->bus, extract32(addr, 1, 7),
extract32(addr, 0, 1))) {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_NAK, 1);
if (aspeed_i2c_bus_pkt_mode_en(bus)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1);
}
} else {
/* START doesn't set TX_ACK in packet mode */
if (!aspeed_i2c_bus_pkt_mode_en(bus)) {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_ACK, 1);
}
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_START_CMD, 0);
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_DMA_EN)) {
if (bus->regs[reg_dma_len] == 0) {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0);
}
} else if (!SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0);
}
/* No slave found */
if (!i2c_bus_busy(bus->bus)) {
if (aspeed_i2c_bus_pkt_mode_en(bus)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1);
ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE, 1);
}
return;
}
aspeed_i2c_set_state(bus, I2CD_MACTIVE);
}
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_TX_CMD)) {
aspeed_i2c_set_state(bus, I2CD_MTXD);
if (aspeed_i2c_bus_send(bus)) {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_NAK, 1);
i2c_end_transfer(bus->bus);
} else {
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, TX_ACK, 1);
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0);
aspeed_i2c_set_state(bus, I2CD_MACTIVE);
}
if ((SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_RX_CMD) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_S_RX_CMD_LAST)) &&
!SHARED_ARRAY_FIELD_EX32(bus->regs, reg_intr_sts, RX_DONE)) {
aspeed_i2c_handle_rx_cmd(bus);
}
if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, M_STOP_CMD)) {
if (!(aspeed_i2c_get_state(bus) & I2CD_MACTIVE)) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: abnormal stop\n", __func__);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, ABNORMAL, 1);
if (aspeed_i2c_bus_pkt_mode_en(bus)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_FAIL, 1);
}
} else {
aspeed_i2c_set_state(bus, I2CD_MSTOP);
i2c_end_transfer(bus->bus);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, NORMAL_STOP, 1);
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_STOP_CMD, 0);
aspeed_i2c_set_state(bus, I2CD_IDLE);
i2c_schedule_pending_master(bus->bus);
}
if (aspeed_i2c_bus_pkt_mode_en(bus)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_INTR_STS, PKT_CMD_DONE, 1);
}
}
static void aspeed_i2c_bus_new_write(AspeedI2CBus *bus, hwaddr offset,
uint64_t value, unsigned size)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
bool handle_rx;
bool w1t;
trace_aspeed_i2c_bus_write(bus->id, offset, size, value);
switch (offset) {
case A_I2CC_FUN_CTRL:
bus->regs[R_I2CC_FUN_CTRL] = value;
break;
case A_I2CC_AC_TIMING:
bus->regs[R_I2CC_AC_TIMING] = value & 0x1ffff0ff;
break;
case A_I2CC_MS_TXRX_BYTE_BUF:
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CC_MS_TXRX_BYTE_BUF, TX_BUF,
value);
break;
case A_I2CC_POOL_CTRL:
bus->regs[R_I2CC_POOL_CTRL] &= ~0xffffff;
bus->regs[R_I2CC_POOL_CTRL] |= (value & 0xffffff);
break;
case A_I2CM_INTR_CTRL:
bus->regs[R_I2CM_INTR_CTRL] = value & 0x0007f07f;
break;
case A_I2CM_INTR_STS:
handle_rx = SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_INTR_STS, RX_DONE)
&& SHARED_FIELD_EX32(value, RX_DONE);
/* In packet mode, clearing PKT_CMD_DONE clears other interrupts. */
if (aspeed_i2c_bus_pkt_mode_en(bus) &&
FIELD_EX32(value, I2CM_INTR_STS, PKT_CMD_DONE)) {
bus->regs[R_I2CM_INTR_STS] &= 0xf0001000;
if (!bus->regs[R_I2CM_INTR_STS]) {
bus->controller->intr_status &= ~(1 << bus->id);
qemu_irq_lower(aic->bus_get_irq(bus));
}
aspeed_i2c_bus_raise_slave_interrupt(bus);
break;
}
bus->regs[R_I2CM_INTR_STS] &= ~(value & 0xf007f07f);
if (!bus->regs[R_I2CM_INTR_STS]) {
bus->controller->intr_status &= ~(1 << bus->id);
qemu_irq_lower(aic->bus_get_irq(bus));
}
if (handle_rx && (SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_CMD,
M_RX_CMD) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CM_CMD,
M_S_RX_CMD_LAST))) {
aspeed_i2c_handle_rx_cmd(bus);
aspeed_i2c_bus_raise_interrupt(bus);
}
break;
case A_I2CM_CMD:
if (!aspeed_i2c_bus_is_enabled(bus)) {
break;
}
if (!aspeed_i2c_bus_is_master(bus)) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: Master mode is not enabled\n",
__func__);
break;
}
if (!aic->has_dma &&
(SHARED_FIELD_EX32(value, RX_DMA_EN) ||
SHARED_FIELD_EX32(value, TX_DMA_EN))) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
break;
}
if (bus->regs[R_I2CM_INTR_STS] & 0xffff0000) {
qemu_log_mask(LOG_UNIMP, "%s: Packet mode is not implemented\n",
__func__);
break;
}
value &= 0xff0ffbfb;
if (ARRAY_FIELD_EX32(bus->regs, I2CM_CMD, W1_CTRL)) {
bus->regs[R_I2CM_CMD] |= value;
} else {
bus->regs[R_I2CM_CMD] = value;
}
aspeed_i2c_bus_handle_cmd(bus, value);
aspeed_i2c_bus_raise_interrupt(bus);
break;
case A_I2CM_DMA_TX_ADDR:
bus->regs[R_I2CM_DMA_TX_ADDR] = FIELD_EX32(value, I2CM_DMA_TX_ADDR,
ADDR);
bus->regs[R_I2CC_DMA_ADDR] = FIELD_EX32(value, I2CM_DMA_TX_ADDR, ADDR);
bus->regs[R_I2CC_DMA_LEN] = ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN,
TX_BUF_LEN) + 1;
break;
case A_I2CM_DMA_RX_ADDR:
bus->regs[R_I2CM_DMA_RX_ADDR] = FIELD_EX32(value, I2CM_DMA_RX_ADDR,
ADDR);
bus->regs[R_I2CC_DMA_ADDR] = FIELD_EX32(value, I2CM_DMA_RX_ADDR, ADDR);
bus->regs[R_I2CC_DMA_LEN] = ARRAY_FIELD_EX32(bus->regs, I2CM_DMA_LEN,
RX_BUF_LEN) + 1;
break;
case A_I2CM_DMA_LEN:
w1t = FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN_W1T) ||
FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN_W1T);
/* If none of the w1t bits are set, just write to the reg as normal. */
if (!w1t) {
bus->regs[R_I2CM_DMA_LEN] = value;
break;
}
if (FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN_W1T)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN, RX_BUF_LEN,
FIELD_EX32(value, I2CM_DMA_LEN, RX_BUF_LEN));
}
if (FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN_W1T)) {
ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN, TX_BUF_LEN,
FIELD_EX32(value, I2CM_DMA_LEN, TX_BUF_LEN));
}
break;
case A_I2CM_DMA_LEN_STS:
/* Writes clear to 0 */
bus->regs[R_I2CM_DMA_LEN_STS] = 0;
break;
case A_I2CC_DMA_ADDR:
case A_I2CC_DMA_LEN:
/* RO */
break;
case A_I2CS_DEV_ADDR:
bus->regs[R_I2CS_DEV_ADDR] = value;
break;
case A_I2CS_DMA_RX_ADDR:
bus->regs[R_I2CS_DMA_RX_ADDR] = value;
break;
case A_I2CS_DMA_LEN:
assert(FIELD_EX32(value, I2CS_DMA_LEN, TX_BUF_LEN) == 0);
if (FIELD_EX32(value, I2CS_DMA_LEN, RX_BUF_LEN_W1T)) {
ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN, RX_BUF_LEN,
FIELD_EX32(value, I2CS_DMA_LEN, RX_BUF_LEN));
} else {
bus->regs[R_I2CS_DMA_LEN] = value;
}
break;
case A_I2CS_CMD:
if (FIELD_EX32(value, I2CS_CMD, W1_CTRL)) {
bus->regs[R_I2CS_CMD] |= value;
} else {
bus->regs[R_I2CS_CMD] = value;
}
i2c_slave_set_address(bus->slave, bus->regs[R_I2CS_DEV_ADDR]);
break;
case A_I2CS_INTR_CTRL:
bus->regs[R_I2CS_INTR_CTRL] = value;
break;
case A_I2CS_INTR_STS:
if (ARRAY_FIELD_EX32(bus->regs, I2CS_INTR_CTRL, PKT_CMD_DONE)) {
if (ARRAY_FIELD_EX32(bus->regs, I2CS_INTR_STS, PKT_CMD_DONE) &&
FIELD_EX32(value, I2CS_INTR_STS, PKT_CMD_DONE)) {
bus->regs[R_I2CS_INTR_STS] &= 0xfffc0000;
}
} else {
bus->regs[R_I2CS_INTR_STS] &= ~value;
}
if (!bus->regs[R_I2CS_INTR_STS]) {
bus->controller->intr_status &= ~(1 << bus->id);
qemu_irq_lower(aic->bus_get_irq(bus));
}
aspeed_i2c_bus_raise_interrupt(bus);
break;
case A_I2CS_DMA_LEN_STS:
bus->regs[R_I2CS_DMA_LEN_STS] = 0;
break;
case A_I2CS_DMA_TX_ADDR:
qemu_log_mask(LOG_UNIMP, "%s: Slave mode DMA TX is not implemented\n",
__func__);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
}
}
static void aspeed_i2c_bus_old_write(AspeedI2CBus *bus, hwaddr offset,
uint64_t value, unsigned size)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
bool handle_rx;
trace_aspeed_i2c_bus_write(bus->id, offset, size, value);
switch (offset) {
case A_I2CD_FUN_CTRL:
if (SHARED_FIELD_EX32(value, SLAVE_EN)) {
i2c_slave_set_address(bus->slave, bus->regs[R_I2CD_DEV_ADDR]);
}
bus->regs[R_I2CD_FUN_CTRL] = value & 0x0071C3FF;
break;
case A_I2CD_AC_TIMING1:
bus->regs[R_I2CD_AC_TIMING1] = value & 0xFFFFF0F;
break;
case A_I2CD_AC_TIMING2:
bus->regs[R_I2CD_AC_TIMING2] = value & 0x7;
break;
case A_I2CD_INTR_CTRL:
bus->regs[R_I2CD_INTR_CTRL] = value & 0x7FFF;
break;
case A_I2CD_INTR_STS:
handle_rx = SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_INTR_STS, RX_DONE)
&& SHARED_FIELD_EX32(value, RX_DONE);
bus->regs[R_I2CD_INTR_STS] &= ~(value & 0x7FFF);
if (!bus->regs[R_I2CD_INTR_STS]) {
bus->controller->intr_status &= ~(1 << bus->id);
qemu_irq_lower(aic->bus_get_irq(bus));
}
if (handle_rx) {
if (SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD, M_RX_CMD) ||
SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CD_CMD,
M_S_RX_CMD_LAST)) {
aspeed_i2c_handle_rx_cmd(bus);
aspeed_i2c_bus_raise_interrupt(bus);
} else if (aspeed_i2c_get_state(bus) == I2CD_STXD) {
i2c_ack(bus->bus);
}
}
break;
case A_I2CD_DEV_ADDR:
bus->regs[R_I2CD_DEV_ADDR] = value;
break;
case A_I2CD_POOL_CTRL:
bus->regs[R_I2CD_POOL_CTRL] &= ~0xffffff;
bus->regs[R_I2CD_POOL_CTRL] |= (value & 0xffffff);
break;
case A_I2CD_BYTE_BUF:
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CD_BYTE_BUF, TX_BUF, value);
break;
case A_I2CD_CMD:
if (!aspeed_i2c_bus_is_enabled(bus)) {
break;
}
if (!aspeed_i2c_bus_is_master(bus)) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: Master mode is not enabled\n",
__func__);
break;
}
if (!aic->has_dma &&
(SHARED_FIELD_EX32(value, RX_DMA_EN) ||
SHARED_FIELD_EX32(value, TX_DMA_EN))) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
break;
}
bus->regs[R_I2CD_CMD] &= ~0xFFFF;
bus->regs[R_I2CD_CMD] |= value & 0xFFFF;
aspeed_i2c_bus_handle_cmd(bus, value);
aspeed_i2c_bus_raise_interrupt(bus);
break;
case A_I2CD_DMA_ADDR:
if (!aic->has_dma) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
break;
}
bus->regs[R_I2CD_DMA_ADDR] = value & 0x3ffffffc;
break;
case A_I2CD_DMA_LEN:
if (!aic->has_dma) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: No DMA support\n", __func__);
break;
}
bus->regs[R_I2CD_DMA_LEN] = value & 0xfff;
if (!bus->regs[R_I2CD_DMA_LEN]) {
qemu_log_mask(LOG_UNIMP, "%s: invalid DMA length\n", __func__);
}
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
}
}
static void aspeed_i2c_bus_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
AspeedI2CBus *bus = opaque;
if (aspeed_i2c_is_new_mode(bus->controller)) {
aspeed_i2c_bus_new_write(bus, offset, value, size);
} else {
aspeed_i2c_bus_old_write(bus, offset, value, size);
}
}
static uint64_t aspeed_i2c_ctrl_read(void *opaque, hwaddr offset,
unsigned size)
{
AspeedI2CState *s = opaque;
switch (offset) {
case A_I2C_CTRL_STATUS:
return s->intr_status;
case A_I2C_CTRL_GLOBAL:
return s->ctrl_global;
case A_I2C_CTRL_NEW_CLK_DIVIDER:
if (aspeed_i2c_is_new_mode(s)) {
return s->new_clk_divider;
}
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
break;
}
return -1;
}
static void aspeed_i2c_ctrl_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
AspeedI2CState *s = opaque;
switch (offset) {
case A_I2C_CTRL_GLOBAL:
s->ctrl_global = value;
break;
case A_I2C_CTRL_NEW_CLK_DIVIDER:
if (aspeed_i2c_is_new_mode(s)) {
s->new_clk_divider = value;
} else {
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx
"\n", __func__, offset);
}
break;
case A_I2C_CTRL_STATUS:
default:
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
break;
}
}
static const MemoryRegionOps aspeed_i2c_bus_ops = {
.read = aspeed_i2c_bus_read,
.write = aspeed_i2c_bus_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps aspeed_i2c_ctrl_ops = {
.read = aspeed_i2c_ctrl_read,
.write = aspeed_i2c_ctrl_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static uint64_t aspeed_i2c_pool_read(void *opaque, hwaddr offset,
unsigned size)
{
AspeedI2CState *s = opaque;
uint64_t ret = 0;
int i;
for (i = 0; i < size; i++) {
ret |= (uint64_t) s->pool[offset + i] << (8 * i);
}
return ret;
}
static void aspeed_i2c_pool_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
AspeedI2CState *s = opaque;
int i;
for (i = 0; i < size; i++) {
s->pool[offset + i] = (value >> (8 * i)) & 0xFF;
}
}
static const MemoryRegionOps aspeed_i2c_pool_ops = {
.read = aspeed_i2c_pool_read,
.write = aspeed_i2c_pool_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
static const VMStateDescription aspeed_i2c_bus_vmstate = {
.name = TYPE_ASPEED_I2C,
.version_id = 5,
.minimum_version_id = 5,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, AspeedI2CBus, ASPEED_I2C_NEW_NUM_REG),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription aspeed_i2c_vmstate = {
.name = TYPE_ASPEED_I2C,
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_UINT32(intr_status, AspeedI2CState),
VMSTATE_STRUCT_ARRAY(busses, AspeedI2CState,
ASPEED_I2C_NR_BUSSES, 1, aspeed_i2c_bus_vmstate,
AspeedI2CBus),
VMSTATE_UINT8_ARRAY(pool, AspeedI2CState, ASPEED_I2C_MAX_POOL_SIZE),
VMSTATE_END_OF_LIST()
}
};
static void aspeed_i2c_reset(DeviceState *dev)
{
AspeedI2CState *s = ASPEED_I2C(dev);
s->intr_status = 0;
}
static void aspeed_i2c_instance_init(Object *obj)
{
AspeedI2CState *s = ASPEED_I2C(obj);
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s);
int i;
for (i = 0; i < aic->num_busses; i++) {
object_initialize_child(obj, "bus[*]", &s->busses[i],
TYPE_ASPEED_I2C_BUS);
}
}
/*
* Address Definitions (AST2400 and AST2500)
*
* 0x000 ... 0x03F: Global Register
* 0x040 ... 0x07F: Device 1
* 0x080 ... 0x0BF: Device 2
* 0x0C0 ... 0x0FF: Device 3
* 0x100 ... 0x13F: Device 4
* 0x140 ... 0x17F: Device 5
* 0x180 ... 0x1BF: Device 6
* 0x1C0 ... 0x1FF: Device 7
* 0x200 ... 0x2FF: Buffer Pool (unused in linux driver)
* 0x300 ... 0x33F: Device 8
* 0x340 ... 0x37F: Device 9
* 0x380 ... 0x3BF: Device 10
* 0x3C0 ... 0x3FF: Device 11
* 0x400 ... 0x43F: Device 12
* 0x440 ... 0x47F: Device 13
* 0x480 ... 0x4BF: Device 14
* 0x800 ... 0xFFF: Buffer Pool (unused in linux driver)
*/
static void aspeed_i2c_realize(DeviceState *dev, Error **errp)
{
int i;
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
AspeedI2CState *s = ASPEED_I2C(dev);
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s);
sysbus_init_irq(sbd, &s->irq);
memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_i2c_ctrl_ops, s,
"aspeed.i2c", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
for (i = 0; i < aic->num_busses; i++) {
Object *bus = OBJECT(&s->busses[i]);
int offset = i < aic->gap ? 1 : 5;
if (!object_property_set_link(bus, "controller", OBJECT(s), errp)) {
return;
}
if (!object_property_set_uint(bus, "bus-id", i, errp)) {
return;
}
if (!sysbus_realize(SYS_BUS_DEVICE(bus), errp)) {
return;
}
memory_region_add_subregion(&s->iomem, aic->reg_size * (i + offset),
&s->busses[i].mr);
}
memory_region_init_io(&s->pool_iomem, OBJECT(s), &aspeed_i2c_pool_ops, s,
"aspeed.i2c-pool", aic->pool_size);
memory_region_add_subregion(&s->iomem, aic->pool_base, &s->pool_iomem);
if (aic->has_dma) {
if (!s->dram_mr) {
error_setg(errp, TYPE_ASPEED_I2C ": 'dram' link not set");
return;
}
address_space_init(&s->dram_as, s->dram_mr,
TYPE_ASPEED_I2C "-dma-dram");
}
}
static Property aspeed_i2c_properties[] = {
DEFINE_PROP_LINK("dram", AspeedI2CState, dram_mr,
TYPE_MEMORY_REGION, MemoryRegion *),
DEFINE_PROP_END_OF_LIST(),
};
static void aspeed_i2c_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &aspeed_i2c_vmstate;
dc->reset = aspeed_i2c_reset;
device_class_set_props(dc, aspeed_i2c_properties);
dc->realize = aspeed_i2c_realize;
dc->desc = "Aspeed I2C Controller";
}
static const TypeInfo aspeed_i2c_info = {
.name = TYPE_ASPEED_I2C,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_init = aspeed_i2c_instance_init,
.instance_size = sizeof(AspeedI2CState),
.class_init = aspeed_i2c_class_init,
.class_size = sizeof(AspeedI2CClass),
.abstract = true,
};
static int aspeed_i2c_bus_new_slave_event(AspeedI2CBus *bus,
enum i2c_event event)
{
switch (event) {
case I2C_START_SEND_ASYNC:
if (!SHARED_ARRAY_FIELD_EX32(bus->regs, R_I2CS_CMD, RX_DMA_EN)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Slave mode RX DMA is not enabled\n", __func__);
return -1;
}
ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN, 0);
bus->regs[R_I2CC_DMA_ADDR] =
ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_RX_ADDR, ADDR);
bus->regs[R_I2CC_DMA_LEN] =
ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_LEN, RX_BUF_LEN) + 1;
i2c_ack(bus->bus);
break;
case I2C_FINISH:
ARRAY_FIELD_DP32(bus->regs, I2CS_INTR_STS, PKT_CMD_DONE, 1);
ARRAY_FIELD_DP32(bus->regs, I2CS_INTR_STS, SLAVE_ADDR_RX_MATCH, 1);
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CS_INTR_STS, NORMAL_STOP, 1);
SHARED_ARRAY_FIELD_DP32(bus->regs, R_I2CS_INTR_STS, RX_DONE, 1);
aspeed_i2c_bus_raise_slave_interrupt(bus);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: i2c event %d unimplemented\n",
__func__, event);
return -1;
}
return 0;
}
static int aspeed_i2c_bus_slave_event(I2CSlave *slave, enum i2c_event event)
{
BusState *qbus = qdev_get_parent_bus(DEVICE(slave));
AspeedI2CBus *bus = ASPEED_I2C_BUS(qbus->parent);
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus);
uint32_t reg_dev_addr = aspeed_i2c_bus_dev_addr_offset(bus);
uint32_t dev_addr = SHARED_ARRAY_FIELD_EX32(bus->regs, reg_dev_addr,
SLAVE_DEV_ADDR1);
if (aspeed_i2c_is_new_mode(bus->controller)) {
return aspeed_i2c_bus_new_slave_event(bus, event);
}
switch (event) {
case I2C_START_SEND_ASYNC:
/* Bit[0] == 0 indicates "send". */
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, dev_addr << 1);
ARRAY_FIELD_DP32(bus->regs, I2CD_INTR_STS, SLAVE_ADDR_RX_MATCH, 1);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1);
aspeed_i2c_set_state(bus, I2CD_STXD);
break;
case I2C_FINISH:
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, NORMAL_STOP, 1);
aspeed_i2c_set_state(bus, I2CD_IDLE);
break;
default:
return -1;
}
aspeed_i2c_bus_raise_interrupt(bus);
return 0;
}
static void aspeed_i2c_bus_new_slave_send_async(AspeedI2CBus *bus, uint8_t data)
{
assert(address_space_write(&bus->controller->dram_as,
bus->regs[R_I2CC_DMA_ADDR],
MEMTXATTRS_UNSPECIFIED, &data, 1) == MEMTX_OK);
bus->regs[R_I2CC_DMA_ADDR]++;
bus->regs[R_I2CC_DMA_LEN]--;
ARRAY_FIELD_DP32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN,
ARRAY_FIELD_EX32(bus->regs, I2CS_DMA_LEN_STS, RX_LEN) + 1);
i2c_ack(bus->bus);
}
static void aspeed_i2c_bus_slave_send_async(I2CSlave *slave, uint8_t data)
{
BusState *qbus = qdev_get_parent_bus(DEVICE(slave));
AspeedI2CBus *bus = ASPEED_I2C_BUS(qbus->parent);
uint32_t reg_intr_sts = aspeed_i2c_bus_intr_sts_offset(bus);
uint32_t reg_byte_buf = aspeed_i2c_bus_byte_buf_offset(bus);
if (aspeed_i2c_is_new_mode(bus->controller)) {
return aspeed_i2c_bus_new_slave_send_async(bus, data);
}
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_byte_buf, RX_BUF, data);
SHARED_ARRAY_FIELD_DP32(bus->regs, reg_intr_sts, RX_DONE, 1);
aspeed_i2c_bus_raise_interrupt(bus);
}
static void aspeed_i2c_bus_slave_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
dc->desc = "Aspeed I2C Bus Slave";
sc->event = aspeed_i2c_bus_slave_event;
sc->send_async = aspeed_i2c_bus_slave_send_async;
}
static const TypeInfo aspeed_i2c_bus_slave_info = {
.name = TYPE_ASPEED_I2C_BUS_SLAVE,
.parent = TYPE_I2C_SLAVE,
.instance_size = sizeof(AspeedI2CBusSlave),
.class_init = aspeed_i2c_bus_slave_class_init,
};
static void aspeed_i2c_bus_reset(DeviceState *dev)
{
AspeedI2CBus *s = ASPEED_I2C_BUS(dev);
memset(s->regs, 0, sizeof(s->regs));
i2c_end_transfer(s->bus);
}
static void aspeed_i2c_bus_realize(DeviceState *dev, Error **errp)
{
AspeedI2CBus *s = ASPEED_I2C_BUS(dev);
AspeedI2CClass *aic;
g_autofree char *name = g_strdup_printf(TYPE_ASPEED_I2C_BUS ".%d", s->id);
if (!s->controller) {
error_setg(errp, TYPE_ASPEED_I2C_BUS ": 'controller' link not set");
return;
}
aic = ASPEED_I2C_GET_CLASS(s->controller);
sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
s->bus = i2c_init_bus(dev, name);
s->slave = i2c_slave_create_simple(s->bus, TYPE_ASPEED_I2C_BUS_SLAVE,
0xff);
memory_region_init_io(&s->mr, OBJECT(s), &aspeed_i2c_bus_ops,
s, name, aic->reg_size);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr);
}
static Property aspeed_i2c_bus_properties[] = {
DEFINE_PROP_UINT8("bus-id", AspeedI2CBus, id, 0),
DEFINE_PROP_LINK("controller", AspeedI2CBus, controller, TYPE_ASPEED_I2C,
AspeedI2CState *),
DEFINE_PROP_END_OF_LIST(),
};
static void aspeed_i2c_bus_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Aspeed I2C Bus";
dc->realize = aspeed_i2c_bus_realize;
dc->reset = aspeed_i2c_bus_reset;
device_class_set_props(dc, aspeed_i2c_bus_properties);
}
static const TypeInfo aspeed_i2c_bus_info = {
.name = TYPE_ASPEED_I2C_BUS,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AspeedI2CBus),
.class_init = aspeed_i2c_bus_class_init,
};
static qemu_irq aspeed_2400_i2c_bus_get_irq(AspeedI2CBus *bus)
{
return bus->controller->irq;
}
static uint8_t *aspeed_2400_i2c_bus_pool_base(AspeedI2CBus *bus)
{
uint8_t *pool_page =
&bus->controller->pool[ARRAY_FIELD_EX32(bus->regs, I2CD_FUN_CTRL,
POOL_PAGE_SEL) * 0x100];
return &pool_page[ARRAY_FIELD_EX32(bus->regs, I2CD_POOL_CTRL, OFFSET)];
}
static void aspeed_2400_i2c_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
dc->desc = "ASPEED 2400 I2C Controller";
aic->num_busses = 14;
aic->reg_size = 0x40;
aic->gap = 7;
aic->bus_get_irq = aspeed_2400_i2c_bus_get_irq;
aic->pool_size = 0x800;
aic->pool_base = 0x800;
aic->bus_pool_base = aspeed_2400_i2c_bus_pool_base;
}
static const TypeInfo aspeed_2400_i2c_info = {
.name = TYPE_ASPEED_2400_I2C,
.parent = TYPE_ASPEED_I2C,
.class_init = aspeed_2400_i2c_class_init,
};
static qemu_irq aspeed_2500_i2c_bus_get_irq(AspeedI2CBus *bus)
{
return bus->controller->irq;
}
static uint8_t *aspeed_2500_i2c_bus_pool_base(AspeedI2CBus *bus)
{
return &bus->controller->pool[bus->id * 0x10];
}
static void aspeed_2500_i2c_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
dc->desc = "ASPEED 2500 I2C Controller";
aic->num_busses = 14;
aic->reg_size = 0x40;
aic->gap = 7;
aic->bus_get_irq = aspeed_2500_i2c_bus_get_irq;
aic->pool_size = 0x100;
aic->pool_base = 0x200;
aic->bus_pool_base = aspeed_2500_i2c_bus_pool_base;
aic->check_sram = true;
aic->has_dma = true;
}
static const TypeInfo aspeed_2500_i2c_info = {
.name = TYPE_ASPEED_2500_I2C,
.parent = TYPE_ASPEED_I2C,
.class_init = aspeed_2500_i2c_class_init,
};
static qemu_irq aspeed_2600_i2c_bus_get_irq(AspeedI2CBus *bus)
{
return bus->irq;
}
static uint8_t *aspeed_2600_i2c_bus_pool_base(AspeedI2CBus *bus)
{
return &bus->controller->pool[bus->id * 0x20];
}
static void aspeed_2600_i2c_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
dc->desc = "ASPEED 2600 I2C Controller";
aic->num_busses = 16;
aic->reg_size = 0x80;
aic->gap = -1; /* no gap */
aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq;
aic->pool_size = 0x200;
aic->pool_base = 0xC00;
aic->bus_pool_base = aspeed_2600_i2c_bus_pool_base;
aic->has_dma = true;
}
static const TypeInfo aspeed_2600_i2c_info = {
.name = TYPE_ASPEED_2600_I2C,
.parent = TYPE_ASPEED_I2C,
.class_init = aspeed_2600_i2c_class_init,
};
static void aspeed_1030_i2c_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
dc->desc = "ASPEED 1030 I2C Controller";
aic->num_busses = 14;
aic->reg_size = 0x80;
aic->gap = -1; /* no gap */
aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq;
aic->pool_size = 0x200;
aic->pool_base = 0xC00;
aic->bus_pool_base = aspeed_2600_i2c_bus_pool_base;
aic->has_dma = true;
}
static const TypeInfo aspeed_1030_i2c_info = {
.name = TYPE_ASPEED_1030_I2C,
.parent = TYPE_ASPEED_I2C,
.class_init = aspeed_1030_i2c_class_init,
};
static void aspeed_i2c_register_types(void)
{
type_register_static(&aspeed_i2c_bus_info);
type_register_static(&aspeed_i2c_bus_slave_info);
type_register_static(&aspeed_i2c_info);
type_register_static(&aspeed_2400_i2c_info);
type_register_static(&aspeed_2500_i2c_info);
type_register_static(&aspeed_2600_i2c_info);
type_register_static(&aspeed_1030_i2c_info);
}
type_init(aspeed_i2c_register_types)
I2CBus *aspeed_i2c_get_bus(AspeedI2CState *s, int busnr)
{
AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(s);
I2CBus *bus = NULL;
if (busnr >= 0 && busnr < aic->num_busses) {
bus = s->busses[busnr].bus;
}
return bus;
}
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