diff options
Diffstat (limited to 'hw/i2c/aspeed_i2c.c')
| -rw-r--r-- | hw/i2c/aspeed_i2c.c | 1424 |
1 files changed, 1424 insertions, 0 deletions
diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c new file mode 100644 index 00000000..c166fd20 --- /dev/null +++ b/hw/i2c/aspeed_i2c.c @@ -0,0 +1,1424 @@ +/* + * 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, uint8_t pool_start) +{ + 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); + + if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) { + for (i = pool_start; 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", pool_start, 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_COUNT); + + if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_BUFF_EN)) { + uint8_t *pool_base = aic->bus_pool_base(bus); + + 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)) { + uint8_t data; + /* 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); + } 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) +{ + uint8_t pool_start = 0; + 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_pool_ctrl = aspeed_i2c_bus_pool_ctrl_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); + + /* + * The START command is also a TX command, as the slave + * address is sent on the bus. Drop the TX flag if nothing + * else needs to be sent in this sequence. + */ + if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, TX_BUFF_EN)) { + if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_pool_ctrl, TX_COUNT) + == 1) { + SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_TX_CMD, 0); + } else { + /* + * Increase the start index in the TX pool buffer to + * skip the address byte. + */ + pool_start++; + } + } else 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 { + 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, pool_start)) { + 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); + } + + 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; +} |