/* * ASPEED AST2400 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, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef ASPEED_I2C_H #define ASPEED_I2C_H #include "hw/i2c/i2c.h" #include "hw/sysbus.h" #include "hw/registerfields.h" #include "qom/object.h" #define TYPE_ASPEED_I2C "aspeed.i2c" #define TYPE_ASPEED_2400_I2C TYPE_ASPEED_I2C "-ast2400" #define TYPE_ASPEED_2500_I2C TYPE_ASPEED_I2C "-ast2500" #define TYPE_ASPEED_2600_I2C TYPE_ASPEED_I2C "-ast2600" #define TYPE_ASPEED_1030_I2C TYPE_ASPEED_I2C "-ast1030" OBJECT_DECLARE_TYPE(AspeedI2CState, AspeedI2CClass, ASPEED_I2C) #define ASPEED_I2C_NR_BUSSES 16 #define ASPEED_I2C_MAX_POOL_SIZE 0x800 #define ASPEED_I2C_OLD_NUM_REG 11 #define ASPEED_I2C_NEW_NUM_REG 22 /* Tx State Machine */ #define I2CD_TX_STATE_MASK 0xf #define I2CD_IDLE 0x0 #define I2CD_MACTIVE 0x8 #define I2CD_MSTART 0x9 #define I2CD_MSTARTR 0xa #define I2CD_MSTOP 0xb #define I2CD_MTXD 0xc #define I2CD_MRXACK 0xd #define I2CD_MRXD 0xe #define I2CD_MTXACK 0xf #define I2CD_SWAIT 0x1 #define I2CD_SRXD 0x4 #define I2CD_STXACK 0x5 #define I2CD_STXD 0x6 #define I2CD_SRXACK 0x7 #define I2CD_RECOVER 0x3 /* I2C Global Register */ REG32(I2C_CTRL_STATUS, 0x0) /* Device Interrupt Status */ REG32(I2C_CTRL_ASSIGN, 0x8) /* Device Interrupt Target Assignment */ REG32(I2C_CTRL_GLOBAL, 0xC) /* Global Control Register */ FIELD(I2C_CTRL_GLOBAL, REG_MODE, 2, 1) FIELD(I2C_CTRL_GLOBAL, SRAM_EN, 0, 1) REG32(I2C_CTRL_NEW_CLK_DIVIDER, 0x10) /* New mode clock divider */ /* I2C Old Mode Device (Bus) Register */ REG32(I2CD_FUN_CTRL, 0x0) /* I2CD Function Control */ FIELD(I2CD_FUN_CTRL, POOL_PAGE_SEL, 20, 3) /* AST2400 */ SHARED_FIELD(M_SDA_LOCK_EN, 16, 1) SHARED_FIELD(MULTI_MASTER_DIS, 15, 1) SHARED_FIELD(M_SCL_DRIVE_EN, 14, 1) SHARED_FIELD(MSB_STS, 9, 1) SHARED_FIELD(SDA_DRIVE_IT_EN, 8, 1) SHARED_FIELD(M_SDA_DRIVE_IT_EN, 7, 1) SHARED_FIELD(M_HIGH_SPEED_EN, 6, 1) SHARED_FIELD(DEF_ADDR_EN, 5, 1) SHARED_FIELD(DEF_ALERT_EN, 4, 1) SHARED_FIELD(DEF_ARP_EN, 3, 1) SHARED_FIELD(DEF_GCALL_EN, 2, 1) SHARED_FIELD(SLAVE_EN, 1, 1) SHARED_FIELD(MASTER_EN, 0, 1) REG32(I2CD_AC_TIMING1, 0x04) /* Clock and AC Timing Control #1 */ REG32(I2CD_AC_TIMING2, 0x08) /* Clock and AC Timing Control #2 */ REG32(I2CD_INTR_CTRL, 0x0C) /* I2CD Interrupt Control */ REG32(I2CD_INTR_STS, 0x10) /* I2CD Interrupt Status */ SHARED_FIELD(SLAVE_ADDR_MATCH, 31, 1) /* 0: addr1 1: addr2 */ SHARED_FIELD(SLAVE_ADDR_RX_PENDING, 29, 1) SHARED_FIELD(SLAVE_INACTIVE_TIMEOUT, 15, 1) SHARED_FIELD(SDA_DL_TIMEOUT, 14, 1) SHARED_FIELD(BUS_RECOVER_DONE, 13, 1) SHARED_FIELD(SMBUS_ALERT, 12, 1) /* Bus [0-3] only */ FIELD(I2CD_INTR_STS, SMBUS_ARP_ADDR, 11, 1) /* Removed */ FIELD(I2CD_INTR_STS, SMBUS_DEV_ALERT_ADDR, 10, 1) /* Removed */ FIELD(I2CD_INTR_STS, SMBUS_DEF_ADDR, 9, 1) /* Removed */ FIELD(I2CD_INTR_STS, GCALL_ADDR, 8, 1) /* Removed */ FIELD(I2CD_INTR_STS, SLAVE_ADDR_RX_MATCH, 7, 1) /* use RX_DONE */ SHARED_FIELD(SCL_TIMEOUT, 6, 1) SHARED_FIELD(ABNORMAL, 5, 1) SHARED_FIELD(NORMAL_STOP, 4, 1) SHARED_FIELD(ARBIT_LOSS, 3, 1) SHARED_FIELD(RX_DONE, 2, 1) SHARED_FIELD(TX_NAK, 1, 1) SHARED_FIELD(TX_ACK, 0, 1) REG32(I2CD_CMD, 0x14) /* I2CD Command/Status */ SHARED_FIELD(SDA_OE, 28, 1) SHARED_FIELD(SDA_O, 27, 1) SHARED_FIELD(SCL_OE, 26, 1) SHARED_FIELD(SCL_O, 25, 1) SHARED_FIELD(TX_TIMING, 23, 2) SHARED_FIELD(TX_STATE, 19, 4) SHARED_FIELD(SCL_LINE_STS, 18, 1) SHARED_FIELD(SDA_LINE_STS, 17, 1) SHARED_FIELD(BUS_BUSY_STS, 16, 1) SHARED_FIELD(SDA_OE_OUT_DIR, 15, 1) SHARED_FIELD(SDA_O_OUT_DIR, 14, 1) SHARED_FIELD(SCL_OE_OUT_DIR, 13, 1) SHARED_FIELD(SCL_O_OUT_DIR, 12, 1) SHARED_FIELD(BUS_RECOVER_CMD_EN, 11, 1) SHARED_FIELD(S_ALT_EN, 10, 1) /* Command Bits */ SHARED_FIELD(RX_DMA_EN, 9, 1) SHARED_FIELD(TX_DMA_EN, 8, 1) SHARED_FIELD(RX_BUFF_EN, 7, 1) SHARED_FIELD(TX_BUFF_EN, 6, 1) SHARED_FIELD(M_STOP_CMD, 5, 1) SHARED_FIELD(M_S_RX_CMD_LAST, 4, 1) SHARED_FIELD(M_RX_CMD, 3, 1) SHARED_FIELD(S_TX_CMD, 2, 1) SHARED_FIELD(M_TX_CMD, 1, 1) SHARED_FIELD(M_START_CMD, 0, 1) REG32(I2CD_DEV_ADDR, 0x18) /* Slave Device Address */ SHARED_FIELD(SLAVE_DEV_ADDR1, 0, 7) REG32(I2CD_POOL_CTRL, 0x1C) /* Pool Buffer Control */ SHARED_FIELD(RX_COUNT, 24, 5) SHARED_FIELD(RX_SIZE, 16, 5) SHARED_FIELD(TX_COUNT, 9, 5) FIELD(I2CD_POOL_CTRL, OFFSET, 2, 6) /* AST2400 */ REG32(I2CD_BYTE_BUF, 0x20) /* Transmit/Receive Byte Buffer */ SHARED_FIELD(RX_BUF, 8, 8) SHARED_FIELD(TX_BUF, 0, 8) REG32(I2CD_DMA_ADDR, 0x24) /* DMA Buffer Address */ REG32(I2CD_DMA_LEN, 0x28) /* DMA Transfer Length < 4KB */ /* I2C New Mode Device (Bus) Register */ REG32(I2CC_FUN_CTRL, 0x0) FIELD(I2CC_FUN_CTRL, RB_EARLY_DONE_EN, 22, 1) FIELD(I2CC_FUN_CTRL, DMA_DIS_AUTO_RECOVER, 21, 1) FIELD(I2CC_FUN_CTRL, S_SAVE_ADDR, 20, 1) FIELD(I2CC_FUN_CTRL, M_PKT_RETRY_CNT, 18, 2) /* 17:0 shared with I2CD_FUN_CTRL[17:0] */ REG32(I2CC_AC_TIMING, 0x04) REG32(I2CC_MS_TXRX_BYTE_BUF, 0x08) /* 31:16 shared with I2CD_CMD[31:16] */ /* 15:0 shared with I2CD_BYTE_BUF[15:0] */ REG32(I2CC_POOL_CTRL, 0x0c) /* 31:0 shared with I2CD_POOL_CTRL[31:0] */ REG32(I2CM_INTR_CTRL, 0x10) REG32(I2CM_INTR_STS, 0x14) FIELD(I2CM_INTR_STS, PKT_STATE, 28, 4) FIELD(I2CM_INTR_STS, PKT_CMD_TIMEOUT, 18, 1) FIELD(I2CM_INTR_STS, PKT_CMD_FAIL, 17, 1) FIELD(I2CM_INTR_STS, PKT_CMD_DONE, 16, 1) FIELD(I2CM_INTR_STS, BUS_RECOVER_FAIL, 15, 1) /* 14:0 shared with I2CD_INTR_STS[14:0] */ REG32(I2CM_CMD, 0x18) FIELD(I2CM_CMD, W1_CTRL, 31, 1) FIELD(I2CM_CMD, PKT_DEV_ADDR, 24, 7) FIELD(I2CM_CMD, HS_MASTER_MODE_LSB, 17, 3) FIELD(I2CM_CMD, PKT_OP_EN, 16, 1) /* 15:0 shared with I2CD_CMD[15:0] */ REG32(I2CM_DMA_LEN, 0x1c) FIELD(I2CM_DMA_LEN, RX_BUF_LEN_W1T, 31, 1) FIELD(I2CM_DMA_LEN, RX_BUF_LEN, 16, 11) FIELD(I2CM_DMA_LEN, TX_BUF_LEN_W1T, 15, 1) FIELD(I2CM_DMA_LEN, TX_BUF_LEN, 0, 11) REG32(I2CS_INTR_CTRL, 0x20) FIELD(I2CS_INTR_CTRL, PKT_CMD_FAIL, 17, 1) FIELD(I2CS_INTR_CTRL, PKT_CMD_DONE, 16, 1) REG32(I2CS_INTR_STS, 0x24) /* 31:29 shared with I2CD_INTR_STS[31:29] */ FIELD(I2CS_INTR_STS, SLAVE_PARKING_STS, 24, 2) FIELD(I2CS_INTR_STS, SLAVE_ADDR3_NAK, 22, 1) FIELD(I2CS_INTR_STS, SLAVE_ADDR2_NAK, 21, 1) FIELD(I2CS_INTR_STS, SLAVE_ADDR1_NAK, 20, 1) FIELD(I2CS_INTR_STS, SLAVE_ADDR_INDICATOR, 18, 2) FIELD(I2CS_INTR_STS, PKT_CMD_FAIL, 17, 1) FIELD(I2CS_INTR_STS, PKT_CMD_DONE, 16, 1) /* 14:0 shared with I2CD_INTR_STS[14:0] */ FIELD(I2CS_INTR_STS, SLAVE_ADDR_RX_MATCH, 7, 1) REG32(I2CS_CMD, 0x28) FIELD(I2CS_CMD, W1_CTRL, 31, 1) FIELD(I2CS_CMD, PKT_MODE_ACTIVE_ADDR, 17, 2) FIELD(I2CS_CMD, PKT_MODE_EN, 16, 1) FIELD(I2CS_CMD, AUTO_NAK_INACTIVE_ADDR, 15, 1) FIELD(I2CS_CMD, AUTO_NAK_ACTIVE_ADDR, 14, 1) /* 13:0 shared with I2CD_CMD[13:0] */ REG32(I2CS_DMA_LEN, 0x2c) FIELD(I2CS_DMA_LEN, RX_BUF_LEN_W1T, 31, 1) FIELD(I2CS_DMA_LEN, RX_BUF_LEN, 16, 11) FIELD(I2CS_DMA_LEN, TX_BUF_LEN_W1T, 15, 1) FIELD(I2CS_DMA_LEN, TX_BUF_LEN, 0, 11) REG32(I2CM_DMA_TX_ADDR, 0x30) FIELD(I2CM_DMA_TX_ADDR, ADDR, 0, 31) REG32(I2CM_DMA_RX_ADDR, 0x34) FIELD(I2CM_DMA_RX_ADDR, ADDR, 0, 31) REG32(I2CS_DMA_TX_ADDR, 0x38) FIELD(I2CS_DMA_TX_ADDR, ADDR, 0, 31) REG32(I2CS_DMA_RX_ADDR, 0x3c) FIELD(I2CS_DMA_RX_ADDR, ADDR, 0, 31) REG32(I2CS_DEV_ADDR, 0x40) REG32(I2CM_DMA_LEN_STS, 0x48) FIELD(I2CM_DMA_LEN_STS, RX_LEN, 16, 13) FIELD(I2CM_DMA_LEN_STS, TX_LEN, 0, 13) REG32(I2CS_DMA_LEN_STS, 0x4c) FIELD(I2CS_DMA_LEN_STS, RX_LEN, 16, 13) FIELD(I2CS_DMA_LEN_STS, TX_LEN, 0, 13) REG32(I2CC_DMA_ADDR, 0x50) REG32(I2CC_DMA_LEN, 0x54) struct AspeedI2CState; #define TYPE_ASPEED_I2C_BUS "aspeed.i2c.bus" OBJECT_DECLARE_SIMPLE_TYPE(AspeedI2CBus, ASPEED_I2C_BUS) struct AspeedI2CBus { SysBusDevice parent_obj; struct AspeedI2CState *controller; /* slave mode */ I2CSlave *slave; MemoryRegion mr; I2CBus *bus; uint8_t id; qemu_irq irq; uint32_t regs[ASPEED_I2C_NEW_NUM_REG]; }; struct AspeedI2CState { SysBusDevice parent_obj; MemoryRegion iomem; qemu_irq irq; uint32_t intr_status; uint32_t ctrl_global; uint32_t new_clk_divider; MemoryRegion pool_iomem; uint8_t pool[ASPEED_I2C_MAX_POOL_SIZE]; AspeedI2CBus busses[ASPEED_I2C_NR_BUSSES]; MemoryRegion *dram_mr; AddressSpace dram_as; }; #define TYPE_ASPEED_I2C_BUS_SLAVE "aspeed.i2c.slave" OBJECT_DECLARE_SIMPLE_TYPE(AspeedI2CBusSlave, ASPEED_I2C_BUS_SLAVE) struct AspeedI2CBusSlave { I2CSlave i2c; }; struct AspeedI2CClass { SysBusDeviceClass parent_class; uint8_t num_busses; uint8_t reg_size; uint8_t gap; qemu_irq (*bus_get_irq)(AspeedI2CBus *); uint64_t pool_size; hwaddr pool_base; uint8_t *(*bus_pool_base)(AspeedI2CBus *); bool check_sram; bool has_dma; }; static inline bool aspeed_i2c_is_new_mode(AspeedI2CState *s) { return FIELD_EX32(s->ctrl_global, I2C_CTRL_GLOBAL, REG_MODE); } static inline bool aspeed_i2c_bus_pkt_mode_en(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return ARRAY_FIELD_EX32(bus->regs, I2CM_CMD, PKT_OP_EN); } return false; } static inline uint32_t aspeed_i2c_bus_ctrl_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CC_FUN_CTRL; } return R_I2CD_FUN_CTRL; } static inline uint32_t aspeed_i2c_bus_cmd_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CM_CMD; } return R_I2CD_CMD; } static inline uint32_t aspeed_i2c_bus_dev_addr_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CS_DEV_ADDR; } return R_I2CD_DEV_ADDR; } static inline uint32_t aspeed_i2c_bus_intr_ctrl_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CM_INTR_CTRL; } return R_I2CD_INTR_CTRL; } static inline uint32_t aspeed_i2c_bus_intr_sts_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CM_INTR_STS; } return R_I2CD_INTR_STS; } static inline uint32_t aspeed_i2c_bus_pool_ctrl_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CC_POOL_CTRL; } return R_I2CD_POOL_CTRL; } static inline uint32_t aspeed_i2c_bus_byte_buf_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CC_MS_TXRX_BYTE_BUF; } return R_I2CD_BYTE_BUF; } static inline uint32_t aspeed_i2c_bus_dma_len_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CC_DMA_LEN; } return R_I2CD_DMA_LEN; } static inline uint32_t aspeed_i2c_bus_dma_addr_offset(AspeedI2CBus *bus) { if (aspeed_i2c_is_new_mode(bus->controller)) { return R_I2CC_DMA_ADDR; } return R_I2CD_DMA_ADDR; } static inline bool aspeed_i2c_bus_is_master(AspeedI2CBus *bus) { return SHARED_ARRAY_FIELD_EX32(bus->regs, aspeed_i2c_bus_ctrl_offset(bus), MASTER_EN); } static inline bool aspeed_i2c_bus_is_enabled(AspeedI2CBus *bus) { uint32_t ctrl_reg = aspeed_i2c_bus_ctrl_offset(bus); return SHARED_ARRAY_FIELD_EX32(bus->regs, ctrl_reg, MASTER_EN) || SHARED_ARRAY_FIELD_EX32(bus->regs, ctrl_reg, SLAVE_EN); } I2CBus *aspeed_i2c_get_bus(AspeedI2CState *s, int busnr); #endif /* ASPEED_I2C_H */