| /* |
| * 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_share_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->share_pool[offset + i] << (8 * i); |
| } |
| |
| return ret; |
| } |
| |
| static void aspeed_i2c_share_pool_write(void *opaque, hwaddr offset, |
| uint64_t value, unsigned size) |
| { |
| AspeedI2CState *s = opaque; |
| int i; |
| |
| for (i = 0; i < size; i++) { |
| s->share_pool[offset + i] = (value >> (8 * i)) & 0xFF; |
| } |
| } |
| |
| static const MemoryRegionOps aspeed_i2c_share_pool_ops = { |
| .read = aspeed_i2c_share_pool_read, |
| .write = aspeed_i2c_share_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 = (const 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 = 3, |
| .minimum_version_id = 3, |
| .fields = (const VMStateField[]) { |
| VMSTATE_UINT32(intr_status, AspeedI2CState), |
| VMSTATE_STRUCT_ARRAY(busses, AspeedI2CState, |
| ASPEED_I2C_NR_BUSSES, 1, aspeed_i2c_bus_vmstate, |
| AspeedI2CBus), |
| VMSTATE_UINT8_ARRAY(share_pool, AspeedI2CState, |
| ASPEED_I2C_SHARE_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 (AST2500 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 (AST2400 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", aic->mem_size); |
| 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_share_pool_ops, s, |
| "aspeed.i2c-share-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; |
| device_class_set_legacy_reset(dc, 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; |
| device_class_set_legacy_reset(dc, 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->share_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; |
| aic->mem_size = 0x1000; |
| } |
| |
| 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->share_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; |
| aic->mem_size = 0x1000; |
| } |
| |
| 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->share_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; |
| aic->mem_size = 0x1000; |
| } |
| |
| 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; |
| aic->mem_size = 0x10000; |
| } |
| |
| 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; |
| } |
