Lines Matching refs:bus
339 static inline void npcm_i2c_select_bank(struct npcm_i2c *bus, in npcm_i2c_select_bank() argument
342 u8 i2cctl3 = ioread8(bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
348 iowrite8(i2cctl3, bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
351 static void npcm_i2c_init_params(struct npcm_i2c *bus) in npcm_i2c_init_params() argument
353 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_init_params()
354 bus->rd_size = 0; in npcm_i2c_init_params()
355 bus->wr_size = 0; in npcm_i2c_init_params()
356 bus->rd_ind = 0; in npcm_i2c_init_params()
357 bus->wr_ind = 0; in npcm_i2c_init_params()
358 bus->read_block_use = false; in npcm_i2c_init_params()
359 bus->int_time_stamp = 0; in npcm_i2c_init_params()
360 bus->PEC_use = false; in npcm_i2c_init_params()
361 bus->PEC_mask = 0; in npcm_i2c_init_params()
363 if (bus->slave) in npcm_i2c_init_params()
364 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_init_params()
368 static inline void npcm_i2c_wr_byte(struct npcm_i2c *bus, u8 data) in npcm_i2c_wr_byte() argument
370 iowrite8(data, bus->reg + NPCM_I2CSDA); in npcm_i2c_wr_byte()
373 static inline u8 npcm_i2c_rd_byte(struct npcm_i2c *bus) in npcm_i2c_rd_byte() argument
375 return ioread8(bus->reg + NPCM_I2CSDA); in npcm_i2c_rd_byte()
380 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_get_SCL() local
382 return !!(I2CCTL3_SCL_LVL & ioread8(bus->reg + NPCM_I2CCTL3)); in npcm_i2c_get_SCL()
387 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_get_SDA() local
389 return !!(I2CCTL3_SDA_LVL & ioread8(bus->reg + NPCM_I2CCTL3)); in npcm_i2c_get_SDA()
392 static inline u16 npcm_i2c_get_index(struct npcm_i2c *bus) in npcm_i2c_get_index() argument
394 if (bus->operation == I2C_READ_OPER) in npcm_i2c_get_index()
395 return bus->rd_ind; in npcm_i2c_get_index()
396 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_get_index()
397 return bus->wr_ind; in npcm_i2c_get_index()
402 static inline bool npcm_i2c_is_quick(struct npcm_i2c *bus) in npcm_i2c_is_quick() argument
404 return bus->wr_size == 0 && bus->rd_size == 0; in npcm_i2c_is_quick()
407 static void npcm_i2c_disable(struct npcm_i2c *bus) in npcm_i2c_disable() argument
416 iowrite8(0, bus->reg + npcm_i2caddr[i]); in npcm_i2c_disable()
420 i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2); in npcm_i2c_disable()
422 iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2); in npcm_i2c_disable()
424 bus->state = I2C_DISABLE; in npcm_i2c_disable()
427 static void npcm_i2c_enable(struct npcm_i2c *bus) in npcm_i2c_enable() argument
429 u8 i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2); in npcm_i2c_enable()
432 iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2); in npcm_i2c_enable()
433 bus->state = I2C_IDLE; in npcm_i2c_enable()
437 static inline void npcm_i2c_eob_int(struct npcm_i2c *bus, bool enable) in npcm_i2c_eob_int() argument
442 val = ioread8(bus->reg + NPCM_I2CCST3); in npcm_i2c_eob_int()
444 iowrite8(val, bus->reg + NPCM_I2CCST3); in npcm_i2c_eob_int()
446 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_eob_int()
452 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_eob_int()
455 static inline bool npcm_i2c_tx_fifo_empty(struct npcm_i2c *bus) in npcm_i2c_tx_fifo_empty() argument
459 tx_fifo_sts = ioread8(bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_tx_fifo_empty()
461 if ((tx_fifo_sts & bus->data->txf_sts_tx_bytes) == 0) in npcm_i2c_tx_fifo_empty()
468 static inline bool npcm_i2c_rx_fifo_full(struct npcm_i2c *bus) in npcm_i2c_rx_fifo_full() argument
472 rx_fifo_sts = ioread8(bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_rx_fifo_full()
474 if ((rx_fifo_sts & bus->data->rxf_sts_rx_bytes) == 0) in npcm_i2c_rx_fifo_full()
481 static inline void npcm_i2c_clear_fifo_int(struct npcm_i2c *bus) in npcm_i2c_clear_fifo_int() argument
485 val = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_clear_fifo_int()
487 iowrite8(val, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_clear_fifo_int()
490 static inline void npcm_i2c_clear_tx_fifo(struct npcm_i2c *bus) in npcm_i2c_clear_tx_fifo() argument
494 val = ioread8(bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_clear_tx_fifo()
496 iowrite8(val, bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_clear_tx_fifo()
499 static inline void npcm_i2c_clear_rx_fifo(struct npcm_i2c *bus) in npcm_i2c_clear_rx_fifo() argument
503 val = ioread8(bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_clear_rx_fifo()
505 iowrite8(val, bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_clear_rx_fifo()
508 static void npcm_i2c_int_enable(struct npcm_i2c *bus, bool enable) in npcm_i2c_int_enable() argument
512 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_int_enable()
518 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_int_enable()
521 static inline void npcm_i2c_master_start(struct npcm_i2c *bus) in npcm_i2c_master_start() argument
525 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_start()
528 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_start()
531 static inline void npcm_i2c_master_stop(struct npcm_i2c *bus) in npcm_i2c_master_stop() argument
541 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_stop()
544 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_stop()
546 if (!bus->fifo_use) in npcm_i2c_master_stop()
549 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_master_stop()
551 if (bus->operation == I2C_READ_OPER) in npcm_i2c_master_stop()
552 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_master_stop()
554 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_master_stop()
555 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_master_stop()
556 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_master_stop()
559 static inline void npcm_i2c_stall_after_start(struct npcm_i2c *bus, bool stall) in npcm_i2c_stall_after_start() argument
563 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_stall_after_start()
569 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_stall_after_start()
572 static inline void npcm_i2c_nack(struct npcm_i2c *bus) in npcm_i2c_nack() argument
576 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_nack()
579 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_nack()
582 static inline void npcm_i2c_clear_master_status(struct npcm_i2c *bus) in npcm_i2c_clear_master_status() argument
588 iowrite8(val, bus->reg + NPCM_I2CST); in npcm_i2c_clear_master_status()
592 static void npcm_i2c_slave_int_enable(struct npcm_i2c *bus, bool enable) in npcm_i2c_slave_int_enable() argument
597 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_int_enable()
603 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_int_enable()
606 static int npcm_i2c_slave_enable(struct npcm_i2c *bus, enum i2c_addr addr_type, in npcm_i2c_slave_enable() argument
615 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_enable()
620 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_enable()
623 i2cctl3 = ioread8(bus->reg + NPCM_I2CCTL3); in npcm_i2c_slave_enable()
628 iowrite8(i2cctl3, bus->reg + NPCM_I2CCTL3); in npcm_i2c_slave_enable()
632 dev_err(bus->dev, "try to enable more than 2 SA not supported\n"); in npcm_i2c_slave_enable()
638 iowrite8(sa_reg, bus->reg + npcm_i2caddr[addr_type]); in npcm_i2c_slave_enable()
639 npcm_i2c_slave_int_enable(bus, enable); in npcm_i2c_slave_enable()
645 static void npcm_i2c_reset(struct npcm_i2c *bus) in npcm_i2c_reset() argument
656 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_reset()
658 npcm_i2c_disable(bus); in npcm_i2c_reset()
659 npcm_i2c_enable(bus); in npcm_i2c_reset()
663 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_reset()
666 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_reset()
667 iowrite8(0xFF, bus->reg + NPCM_I2CST); in npcm_i2c_reset()
670 npcm_i2c_eob_int(bus, false); in npcm_i2c_reset()
673 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_reset()
676 if (bus->slave) { in npcm_i2c_reset()
677 addr = bus->slave->addr; in npcm_i2c_reset()
678 npcm_i2c_slave_enable(bus, I2C_SLAVE_ADDR1, addr, true); in npcm_i2c_reset()
683 npcm_i2c_clear_master_status(bus); in npcm_i2c_reset()
685 bus->state = I2C_IDLE; in npcm_i2c_reset()
688 static inline bool npcm_i2c_is_master(struct npcm_i2c *bus) in npcm_i2c_is_master() argument
690 return !!FIELD_GET(NPCM_I2CST_MASTER, ioread8(bus->reg + NPCM_I2CST)); in npcm_i2c_is_master()
693 static void npcm_i2c_callback(struct npcm_i2c *bus, in npcm_i2c_callback() argument
699 msgs = bus->msgs; in npcm_i2c_callback()
700 msgs_num = bus->msgs_num; in npcm_i2c_callback()
708 if (completion_done(&bus->cmd_complete)) in npcm_i2c_callback()
713 bus->cmd_err = bus->msgs_num; in npcm_i2c_callback()
714 if (bus->tx_complete_cnt < ULLONG_MAX) in npcm_i2c_callback()
715 bus->tx_complete_cnt++; in npcm_i2c_callback()
719 if (bus->msgs) { in npcm_i2c_callback()
726 if (completion_done(&bus->cmd_complete) == false) in npcm_i2c_callback()
727 complete(&bus->cmd_complete); in npcm_i2c_callback()
732 bus->cmd_err = -ENXIO; in npcm_i2c_callback()
733 if (bus->master_or_slave == I2C_MASTER) in npcm_i2c_callback()
734 complete(&bus->cmd_complete); in npcm_i2c_callback()
739 bus->cmd_err = -EAGAIN; in npcm_i2c_callback()
740 if (bus->master_or_slave == I2C_MASTER) in npcm_i2c_callback()
741 complete(&bus->cmd_complete); in npcm_i2c_callback()
751 bus->operation = I2C_NO_OPER; in npcm_i2c_callback()
753 if (bus->slave) in npcm_i2c_callback()
754 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_callback()
758 static u8 npcm_i2c_fifo_usage(struct npcm_i2c *bus) in npcm_i2c_fifo_usage() argument
760 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_fifo_usage()
761 return (bus->data->txf_sts_tx_bytes & in npcm_i2c_fifo_usage()
762 ioread8(bus->reg + NPCM_I2CTXF_STS)); in npcm_i2c_fifo_usage()
763 if (bus->operation == I2C_READ_OPER) in npcm_i2c_fifo_usage()
764 return (bus->data->rxf_sts_rx_bytes & in npcm_i2c_fifo_usage()
765 ioread8(bus->reg + NPCM_I2CRXF_STS)); in npcm_i2c_fifo_usage()
769 static void npcm_i2c_write_to_fifo_master(struct npcm_i2c *bus, u16 max_bytes) in npcm_i2c_write_to_fifo_master() argument
777 size_free_fifo = bus->data->fifo_size - npcm_i2c_fifo_usage(bus); in npcm_i2c_write_to_fifo_master()
779 if (bus->wr_ind < bus->wr_size) in npcm_i2c_write_to_fifo_master()
780 npcm_i2c_wr_byte(bus, bus->wr_buf[bus->wr_ind++]); in npcm_i2c_write_to_fifo_master()
782 npcm_i2c_wr_byte(bus, 0xFF); in npcm_i2c_write_to_fifo_master()
783 size_free_fifo = bus->data->fifo_size - npcm_i2c_fifo_usage(bus); in npcm_i2c_write_to_fifo_master()
792 static void npcm_i2c_set_fifo(struct npcm_i2c *bus, int nread, int nwrite) in npcm_i2c_set_fifo() argument
796 if (!bus->fifo_use) in npcm_i2c_set_fifo()
798 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_set_fifo()
799 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_set_fifo()
800 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_set_fifo()
804 rxf_ctl = min_t(int, nread, bus->data->fifo_size); in npcm_i2c_set_fifo()
807 if (nread <= bus->data->fifo_size) in npcm_i2c_set_fifo()
808 rxf_ctl |= bus->data->rxf_ctl_last_pec; in npcm_i2c_set_fifo()
815 if (bus->rd_ind == 0 && bus->read_block_use) { in npcm_i2c_set_fifo()
821 iowrite8(rxf_ctl, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_set_fifo()
826 if (nwrite > bus->data->fifo_size) in npcm_i2c_set_fifo()
828 iowrite8(bus->data->fifo_size, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_set_fifo()
830 iowrite8(nwrite, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_set_fifo()
832 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_set_fifo()
836 static void npcm_i2c_read_fifo(struct npcm_i2c *bus, u8 bytes_in_fifo) in npcm_i2c_read_fifo() argument
841 data = npcm_i2c_rd_byte(bus); in npcm_i2c_read_fifo()
842 if (bus->rd_ind < bus->rd_size) in npcm_i2c_read_fifo()
843 bus->rd_buf[bus->rd_ind++] = data; in npcm_i2c_read_fifo()
847 static void npcm_i2c_master_abort(struct npcm_i2c *bus) in npcm_i2c_master_abort() argument
850 if (!npcm_i2c_is_master(bus)) in npcm_i2c_master_abort()
853 npcm_i2c_eob_int(bus, true); in npcm_i2c_master_abort()
854 npcm_i2c_master_stop(bus); in npcm_i2c_master_abort()
855 npcm_i2c_clear_master_status(bus); in npcm_i2c_master_abort()
859 static u8 npcm_i2c_get_slave_addr(struct npcm_i2c *bus, enum i2c_addr addr_type) in npcm_i2c_get_slave_addr() argument
864 dev_err(bus->dev, "get slave: try to use more than 2 SA not supported\n"); in npcm_i2c_get_slave_addr()
866 slave_add = ioread8(bus->reg + npcm_i2caddr[(int)addr_type]); in npcm_i2c_get_slave_addr()
871 static int npcm_i2c_remove_slave_addr(struct npcm_i2c *bus, u8 slave_add) in npcm_i2c_remove_slave_addr() argument
879 if (ioread8(bus->reg + npcm_i2caddr[i]) == slave_add) in npcm_i2c_remove_slave_addr()
880 iowrite8(0, bus->reg + npcm_i2caddr[i]); in npcm_i2c_remove_slave_addr()
886 static void npcm_i2c_write_fifo_slave(struct npcm_i2c *bus, u16 max_bytes) in npcm_i2c_write_fifo_slave() argument
892 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_write_fifo_slave()
893 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_write_fifo_slave()
894 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_write_fifo_slave()
895 while (max_bytes-- && bus->data->fifo_size != npcm_i2c_fifo_usage(bus)) { in npcm_i2c_write_fifo_slave()
896 if (bus->slv_wr_size <= 0) in npcm_i2c_write_fifo_slave()
898 bus->slv_wr_ind = bus->slv_wr_ind & (bus->data->fifo_size - 1); in npcm_i2c_write_fifo_slave()
899 npcm_i2c_wr_byte(bus, bus->slv_wr_buf[bus->slv_wr_ind]); in npcm_i2c_write_fifo_slave()
900 bus->slv_wr_ind++; in npcm_i2c_write_fifo_slave()
901 bus->slv_wr_ind = bus->slv_wr_ind & (bus->data->fifo_size - 1); in npcm_i2c_write_fifo_slave()
902 bus->slv_wr_size--; in npcm_i2c_write_fifo_slave()
906 static void npcm_i2c_read_fifo_slave(struct npcm_i2c *bus, u8 bytes_in_fifo) in npcm_i2c_read_fifo_slave() argument
910 if (!bus->slave) in npcm_i2c_read_fifo_slave()
914 data = npcm_i2c_rd_byte(bus); in npcm_i2c_read_fifo_slave()
916 bus->slv_rd_ind = bus->slv_rd_ind & (bus->data->fifo_size - 1); in npcm_i2c_read_fifo_slave()
917 bus->slv_rd_buf[bus->slv_rd_ind] = data; in npcm_i2c_read_fifo_slave()
918 bus->slv_rd_ind++; in npcm_i2c_read_fifo_slave()
921 if (bus->slv_rd_ind == 1 && bus->read_block_use) in npcm_i2c_read_fifo_slave()
922 bus->slv_rd_size = data + bus->PEC_use + 1; in npcm_i2c_read_fifo_slave()
926 static int npcm_i2c_slave_get_wr_buf(struct npcm_i2c *bus) in npcm_i2c_slave_get_wr_buf() argument
931 int ret = bus->slv_wr_ind; in npcm_i2c_slave_get_wr_buf()
934 for (i = 0; i < bus->data->fifo_size; i++) { in npcm_i2c_slave_get_wr_buf()
935 if (bus->slv_wr_size >= bus->data->fifo_size) in npcm_i2c_slave_get_wr_buf()
937 if (bus->state == I2C_SLAVE_MATCH) { in npcm_i2c_slave_get_wr_buf()
938 i2c_slave_event(bus->slave, I2C_SLAVE_READ_REQUESTED, &value); in npcm_i2c_slave_get_wr_buf()
939 bus->state = I2C_OPER_STARTED; in npcm_i2c_slave_get_wr_buf()
941 i2c_slave_event(bus->slave, I2C_SLAVE_READ_PROCESSED, &value); in npcm_i2c_slave_get_wr_buf()
943 ind = (bus->slv_wr_ind + bus->slv_wr_size) & (bus->data->fifo_size - 1); in npcm_i2c_slave_get_wr_buf()
944 bus->slv_wr_buf[ind] = value; in npcm_i2c_slave_get_wr_buf()
945 bus->slv_wr_size++; in npcm_i2c_slave_get_wr_buf()
947 return bus->data->fifo_size - ret; in npcm_i2c_slave_get_wr_buf()
950 static void npcm_i2c_slave_send_rd_buf(struct npcm_i2c *bus) in npcm_i2c_slave_send_rd_buf() argument
954 for (i = 0; i < bus->slv_rd_ind; i++) in npcm_i2c_slave_send_rd_buf()
955 i2c_slave_event(bus->slave, I2C_SLAVE_WRITE_RECEIVED, in npcm_i2c_slave_send_rd_buf()
956 &bus->slv_rd_buf[i]); in npcm_i2c_slave_send_rd_buf()
961 if (bus->slv_rd_ind) { in npcm_i2c_slave_send_rd_buf()
962 bus->slv_wr_size = 0; in npcm_i2c_slave_send_rd_buf()
963 bus->slv_wr_ind = 0; in npcm_i2c_slave_send_rd_buf()
966 bus->slv_rd_ind = 0; in npcm_i2c_slave_send_rd_buf()
967 bus->slv_rd_size = bus->adap.quirks->max_read_len; in npcm_i2c_slave_send_rd_buf()
969 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_slave_send_rd_buf()
970 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_slave_send_rd_buf()
973 static void npcm_i2c_slave_receive(struct npcm_i2c *bus, u16 nread, in npcm_i2c_slave_receive() argument
976 bus->state = I2C_OPER_STARTED; in npcm_i2c_slave_receive()
977 bus->operation = I2C_READ_OPER; in npcm_i2c_slave_receive()
978 bus->slv_rd_size = nread; in npcm_i2c_slave_receive()
979 bus->slv_rd_ind = 0; in npcm_i2c_slave_receive()
981 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_slave_receive()
982 iowrite8(bus->data->fifo_size, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_slave_receive()
983 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_slave_receive()
984 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_slave_receive()
987 static void npcm_i2c_slave_xmit(struct npcm_i2c *bus, u16 nwrite, in npcm_i2c_slave_xmit() argument
993 bus->operation = I2C_WRITE_OPER; in npcm_i2c_slave_xmit()
996 npcm_i2c_slave_get_wr_buf(bus); in npcm_i2c_slave_xmit()
997 npcm_i2c_write_fifo_slave(bus, nwrite); in npcm_i2c_slave_xmit()
1011 static void npcm_i2c_slave_wr_buf_sync(struct npcm_i2c *bus) in npcm_i2c_slave_wr_buf_sync() argument
1015 left_in_fifo = bus->data->txf_sts_tx_bytes & in npcm_i2c_slave_wr_buf_sync()
1016 ioread8(bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_slave_wr_buf_sync()
1019 if (left_in_fifo >= bus->data->fifo_size || in npcm_i2c_slave_wr_buf_sync()
1020 bus->slv_wr_size >= bus->data->fifo_size) in npcm_i2c_slave_wr_buf_sync()
1024 bus->slv_wr_ind = bus->slv_wr_ind - left_in_fifo; in npcm_i2c_slave_wr_buf_sync()
1025 bus->slv_wr_size = bus->slv_wr_size + left_in_fifo; in npcm_i2c_slave_wr_buf_sync()
1027 if (bus->slv_wr_ind < 0) in npcm_i2c_slave_wr_buf_sync()
1028 bus->slv_wr_ind += bus->data->fifo_size; in npcm_i2c_slave_wr_buf_sync()
1031 static void npcm_i2c_slave_rd_wr(struct npcm_i2c *bus) in npcm_i2c_slave_rd_wr() argument
1033 if (NPCM_I2CST_XMIT & ioread8(bus->reg + NPCM_I2CST)) { in npcm_i2c_slave_rd_wr()
1038 bus->operation = I2C_WRITE_OPER; in npcm_i2c_slave_rd_wr()
1039 npcm_i2c_slave_xmit(bus, bus->adap.quirks->max_write_len, in npcm_i2c_slave_rd_wr()
1040 bus->slv_wr_buf); in npcm_i2c_slave_rd_wr()
1048 bus->operation = I2C_READ_OPER; in npcm_i2c_slave_rd_wr()
1049 npcm_i2c_read_fifo_slave(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_slave_rd_wr()
1050 bus->stop_ind = I2C_SLAVE_RCV_IND; in npcm_i2c_slave_rd_wr()
1051 npcm_i2c_slave_send_rd_buf(bus); in npcm_i2c_slave_rd_wr()
1052 npcm_i2c_slave_receive(bus, bus->adap.quirks->max_read_len, in npcm_i2c_slave_rd_wr()
1053 bus->slv_rd_buf); in npcm_i2c_slave_rd_wr()
1057 static irqreturn_t npcm_i2c_int_slave_handler(struct npcm_i2c *bus) in npcm_i2c_int_slave_handler() argument
1061 u8 i2cst = ioread8(bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1065 bus->stop_ind = I2C_NACK_IND; in npcm_i2c_int_slave_handler()
1066 npcm_i2c_slave_wr_buf_sync(bus); in npcm_i2c_int_slave_handler()
1067 if (bus->fifo_use) in npcm_i2c_int_slave_handler()
1070 bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1073 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_int_slave_handler()
1074 bus->operation = I2C_NO_OPER; in npcm_i2c_int_slave_handler()
1075 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1081 iowrite8(NPCM_I2CST_NEGACK, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1092 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_int_slave_handler()
1095 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1097 bus->state = I2C_IDLE; in npcm_i2c_int_slave_handler()
1103 if (completion_done(&bus->cmd_complete) == false) { in npcm_i2c_int_slave_handler()
1104 bus->cmd_err = -EIO; in npcm_i2c_int_slave_handler()
1105 complete(&bus->cmd_complete); in npcm_i2c_int_slave_handler()
1107 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1108 iowrite8(NPCM_I2CST_BER, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1114 u8 bytes_in_fifo = npcm_i2c_fifo_usage(bus); in npcm_i2c_int_slave_handler()
1116 bus->stop_ind = I2C_SLAVE_DONE_IND; in npcm_i2c_int_slave_handler()
1118 if (bus->operation == I2C_READ_OPER) in npcm_i2c_int_slave_handler()
1119 npcm_i2c_read_fifo_slave(bus, bytes_in_fifo); in npcm_i2c_int_slave_handler()
1122 npcm_i2c_slave_send_rd_buf(bus); in npcm_i2c_int_slave_handler()
1125 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_int_slave_handler()
1132 bus->operation = I2C_NO_OPER; in npcm_i2c_int_slave_handler()
1133 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1134 i2c_slave_event(bus->slave, I2C_SLAVE_STOP, 0); in npcm_i2c_int_slave_handler()
1135 iowrite8(NPCM_I2CST_SLVSTP, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1136 if (bus->fifo_use) { in npcm_i2c_int_slave_handler()
1137 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_int_slave_handler()
1138 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_int_slave_handler()
1139 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_int_slave_handler()
1142 bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1144 bus->state = I2C_IDLE; in npcm_i2c_int_slave_handler()
1149 if (bus->fifo_use && FIELD_GET(NPCM_I2CFIF_CTS_SLVRSTR, in npcm_i2c_int_slave_handler()
1150 ioread8(bus->reg + NPCM_I2CFIF_CTS))) { in npcm_i2c_int_slave_handler()
1151 bus->stop_ind = I2C_SLAVE_RESTART_IND; in npcm_i2c_int_slave_handler()
1152 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_int_slave_handler()
1153 if (bus->operation == I2C_READ_OPER) in npcm_i2c_int_slave_handler()
1154 npcm_i2c_read_fifo_slave(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_int_slave_handler()
1155 bus->operation = I2C_WRITE_OPER; in npcm_i2c_int_slave_handler()
1156 iowrite8(0, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_int_slave_handler()
1159 iowrite8(val, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1160 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1169 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_int_slave_handler()
1170 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_int_slave_handler()
1171 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_int_slave_handler()
1172 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_int_slave_handler()
1173 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_int_slave_handler()
1174 iowrite8(bus->data->fifo_size, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_int_slave_handler()
1176 bus->operation = I2C_WRITE_OPER; in npcm_i2c_int_slave_handler()
1178 i2c_slave_event(bus->slave, I2C_SLAVE_WRITE_REQUESTED, in npcm_i2c_int_slave_handler()
1180 bus->operation = I2C_READ_OPER; in npcm_i2c_int_slave_handler()
1182 if (bus->own_slave_addr == 0xFF) { in npcm_i2c_int_slave_handler()
1184 val = ioread8(bus->reg + NPCM_I2CCST); in npcm_i2c_int_slave_handler()
1191 i2ccst3 = ioread8(bus->reg + NPCM_I2CCST3); in npcm_i2c_int_slave_handler()
1192 i2ccst2 = ioread8(bus->reg + NPCM_I2CCST2); in npcm_i2c_int_slave_handler()
1203 addr = npcm_i2c_get_slave_addr(bus, eaddr); in npcm_i2c_int_slave_handler()
1205 bus->own_slave_addr = addr; in npcm_i2c_int_slave_handler()
1206 if (bus->PEC_mask & BIT(info)) in npcm_i2c_int_slave_handler()
1207 bus->PEC_use = true; in npcm_i2c_int_slave_handler()
1209 bus->PEC_use = false; in npcm_i2c_int_slave_handler()
1212 bus->own_slave_addr = 0; in npcm_i2c_int_slave_handler()
1214 bus->own_slave_addr = 0x61; in npcm_i2c_int_slave_handler()
1225 if ((bus->state == I2C_OPER_STARTED && in npcm_i2c_int_slave_handler()
1226 bus->operation == I2C_READ_OPER && in npcm_i2c_int_slave_handler()
1227 bus->stop_ind == I2C_SLAVE_XMIT_IND) || in npcm_i2c_int_slave_handler()
1228 bus->stop_ind == I2C_SLAVE_RCV_IND) { in npcm_i2c_int_slave_handler()
1230 bus->stop_ind = I2C_SLAVE_RESTART_IND; in npcm_i2c_int_slave_handler()
1235 bus->stop_ind = I2C_SLAVE_XMIT_IND; in npcm_i2c_int_slave_handler()
1237 bus->stop_ind = I2C_SLAVE_RCV_IND; in npcm_i2c_int_slave_handler()
1238 bus->state = I2C_SLAVE_MATCH; in npcm_i2c_int_slave_handler()
1239 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1240 iowrite8(NPCM_I2CST_NMATCH, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1246 (bus->fifo_use && in npcm_i2c_int_slave_handler()
1247 (npcm_i2c_tx_fifo_empty(bus) || npcm_i2c_rx_fifo_full(bus)))) { in npcm_i2c_int_slave_handler()
1248 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1249 iowrite8(NPCM_I2CST_SDAST, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1258 npcm_i2c_eob_int(bus, false); in npcm_i2c_int_slave_handler()
1259 npcm_i2c_clear_master_status(bus); in npcm_i2c_int_slave_handler()
1268 struct npcm_i2c *bus = i2c_get_adapdata(client->adapter); in npcm_i2c_reg_slave() local
1270 bus->slave = client; in npcm_i2c_reg_slave()
1272 if (!bus->slave) in npcm_i2c_reg_slave()
1278 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_reg_slave()
1280 npcm_i2c_init_params(bus); in npcm_i2c_reg_slave()
1281 bus->slv_rd_size = 0; in npcm_i2c_reg_slave()
1282 bus->slv_wr_size = 0; in npcm_i2c_reg_slave()
1283 bus->slv_rd_ind = 0; in npcm_i2c_reg_slave()
1284 bus->slv_wr_ind = 0; in npcm_i2c_reg_slave()
1286 bus->PEC_use = true; in npcm_i2c_reg_slave()
1288 dev_info(bus->dev, "i2c%d register slave SA=0x%x, PEC=%d\n", bus->num, in npcm_i2c_reg_slave()
1289 client->addr, bus->PEC_use); in npcm_i2c_reg_slave()
1291 npcm_i2c_slave_enable(bus, I2C_SLAVE_ADDR1, client->addr, true); in npcm_i2c_reg_slave()
1292 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_reg_slave()
1293 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_reg_slave()
1294 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_reg_slave()
1295 npcm_i2c_slave_int_enable(bus, true); in npcm_i2c_reg_slave()
1297 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_reg_slave()
1303 struct npcm_i2c *bus = client->adapter->algo_data; in npcm_i2c_unreg_slave() local
1306 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1307 if (!bus->slave) { in npcm_i2c_unreg_slave()
1308 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1311 npcm_i2c_slave_int_enable(bus, false); in npcm_i2c_unreg_slave()
1312 npcm_i2c_remove_slave_addr(bus, client->addr); in npcm_i2c_unreg_slave()
1313 bus->slave = NULL; in npcm_i2c_unreg_slave()
1314 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1319 static void npcm_i2c_master_fifo_read(struct npcm_i2c *bus) in npcm_i2c_master_fifo_read() argument
1325 fifo_bytes = npcm_i2c_fifo_usage(bus); in npcm_i2c_master_fifo_read()
1326 rcount = bus->rd_size - bus->rd_ind; in npcm_i2c_master_fifo_read()
1335 if (rcount < (2 * bus->data->fifo_size) && rcount > bus->data->fifo_size) in npcm_i2c_master_fifo_read()
1336 fifo_bytes = rcount - bus->data->fifo_size; in npcm_i2c_master_fifo_read()
1340 bus->state = I2C_STOP_PENDING; in npcm_i2c_master_fifo_read()
1341 bus->stop_ind = ind; in npcm_i2c_master_fifo_read()
1342 npcm_i2c_eob_int(bus, true); in npcm_i2c_master_fifo_read()
1344 npcm_i2c_master_stop(bus); in npcm_i2c_master_fifo_read()
1345 npcm_i2c_read_fifo(bus, fifo_bytes); in npcm_i2c_master_fifo_read()
1347 npcm_i2c_read_fifo(bus, fifo_bytes); in npcm_i2c_master_fifo_read()
1348 rcount = bus->rd_size - bus->rd_ind; in npcm_i2c_master_fifo_read()
1349 npcm_i2c_set_fifo(bus, rcount, -1); in npcm_i2c_master_fifo_read()
1353 static void npcm_i2c_irq_master_handler_write(struct npcm_i2c *bus) in npcm_i2c_irq_master_handler_write() argument
1357 if (bus->fifo_use) in npcm_i2c_irq_master_handler_write()
1358 npcm_i2c_clear_tx_fifo(bus); /* clear the TX fifo status bit */ in npcm_i2c_irq_master_handler_write()
1361 if (bus->wr_ind == bus->wr_size) { in npcm_i2c_irq_master_handler_write()
1362 if (bus->fifo_use && npcm_i2c_fifo_usage(bus) > 0) in npcm_i2c_irq_master_handler_write()
1372 if (bus->rd_size == 0) { in npcm_i2c_irq_master_handler_write()
1374 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_master_handler_write()
1375 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_master_handler_write()
1376 bus->stop_ind = I2C_MASTER_DONE_IND; in npcm_i2c_irq_master_handler_write()
1377 npcm_i2c_master_stop(bus); in npcm_i2c_irq_master_handler_write()
1379 npcm_i2c_wr_byte(bus, 0xFF); in npcm_i2c_irq_master_handler_write()
1383 npcm_i2c_set_fifo(bus, bus->rd_size, -1); in npcm_i2c_irq_master_handler_write()
1385 npcm_i2c_master_start(bus); in npcm_i2c_irq_master_handler_write()
1393 if (bus->rd_size == 1) in npcm_i2c_irq_master_handler_write()
1394 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_master_handler_write()
1397 bus->operation = I2C_READ_OPER; in npcm_i2c_irq_master_handler_write()
1399 npcm_i2c_wr_byte(bus, bus->dest_addr | 0x1); in npcm_i2c_irq_master_handler_write()
1403 if (!bus->fifo_use || bus->wr_size == 1) { in npcm_i2c_irq_master_handler_write()
1404 npcm_i2c_wr_byte(bus, bus->wr_buf[bus->wr_ind++]); in npcm_i2c_irq_master_handler_write()
1406 wcount = bus->wr_size - bus->wr_ind; in npcm_i2c_irq_master_handler_write()
1407 npcm_i2c_set_fifo(bus, -1, wcount); in npcm_i2c_irq_master_handler_write()
1409 npcm_i2c_write_to_fifo_master(bus, wcount); in npcm_i2c_irq_master_handler_write()
1414 static void npcm_i2c_irq_master_handler_read(struct npcm_i2c *bus) in npcm_i2c_irq_master_handler_read() argument
1420 block_extra_bytes_size = bus->read_block_use + bus->PEC_use; in npcm_i2c_irq_master_handler_read()
1426 if (bus->rd_ind == 0) { /* first byte handling: */ in npcm_i2c_irq_master_handler_read()
1427 if (bus->read_block_use) { in npcm_i2c_irq_master_handler_read()
1429 data = npcm_i2c_rd_byte(bus); in npcm_i2c_irq_master_handler_read()
1431 bus->rd_size = data + block_extra_bytes_size; in npcm_i2c_irq_master_handler_read()
1432 bus->rd_buf[bus->rd_ind++] = data; in npcm_i2c_irq_master_handler_read()
1435 if (bus->fifo_use) { in npcm_i2c_irq_master_handler_read()
1436 data = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_master_handler_read()
1438 iowrite8(data, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_master_handler_read()
1441 npcm_i2c_set_fifo(bus, bus->rd_size - 1, -1); in npcm_i2c_irq_master_handler_read()
1442 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_master_handler_read()
1444 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_irq_master_handler_read()
1445 npcm_i2c_master_fifo_read(bus); in npcm_i2c_irq_master_handler_read()
1448 if (bus->rd_size == block_extra_bytes_size && in npcm_i2c_irq_master_handler_read()
1449 bus->read_block_use) { in npcm_i2c_irq_master_handler_read()
1450 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_master_handler_read()
1451 bus->stop_ind = I2C_BLOCK_BYTES_ERR_IND; in npcm_i2c_irq_master_handler_read()
1452 bus->cmd_err = -EIO; in npcm_i2c_irq_master_handler_read()
1453 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_master_handler_read()
1454 npcm_i2c_master_stop(bus); in npcm_i2c_irq_master_handler_read()
1455 npcm_i2c_read_fifo(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_irq_master_handler_read()
1457 npcm_i2c_master_fifo_read(bus); in npcm_i2c_irq_master_handler_read()
1462 static void npcm_i2c_irq_handle_nmatch(struct npcm_i2c *bus) in npcm_i2c_irq_handle_nmatch() argument
1464 iowrite8(NPCM_I2CST_NMATCH, bus->reg + NPCM_I2CST); in npcm_i2c_irq_handle_nmatch()
1465 npcm_i2c_nack(bus); in npcm_i2c_irq_handle_nmatch()
1466 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_irq_handle_nmatch()
1467 npcm_i2c_callback(bus, bus->stop_ind, npcm_i2c_get_index(bus)); in npcm_i2c_irq_handle_nmatch()
1471 static void npcm_i2c_irq_handle_nack(struct npcm_i2c *bus) in npcm_i2c_irq_handle_nack() argument
1475 if (bus->nack_cnt < ULLONG_MAX) in npcm_i2c_irq_handle_nack()
1476 bus->nack_cnt++; in npcm_i2c_irq_handle_nack()
1478 if (bus->fifo_use) { in npcm_i2c_irq_handle_nack()
1483 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_irq_handle_nack()
1484 bus->wr_ind -= npcm_i2c_fifo_usage(bus); in npcm_i2c_irq_handle_nack()
1487 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_nack()
1491 bus->stop_ind = I2C_NACK_IND; in npcm_i2c_irq_handle_nack()
1493 if (npcm_i2c_is_master(bus)) { in npcm_i2c_irq_handle_nack()
1495 npcm_i2c_eob_int(bus, false); in npcm_i2c_irq_handle_nack()
1496 npcm_i2c_master_stop(bus); in npcm_i2c_irq_handle_nack()
1499 npcm_i2c_rd_byte(bus); in npcm_i2c_irq_handle_nack()
1505 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_nack()
1506 readx_poll_timeout_atomic(ioread8, bus->reg + NPCM_I2CCST, val, in npcm_i2c_irq_handle_nack()
1509 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_nack()
1511 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_nack()
1518 npcm_i2c_callback(bus, bus->stop_ind, bus->wr_ind); in npcm_i2c_irq_handle_nack()
1522 static void npcm_i2c_irq_handle_ber(struct npcm_i2c *bus) in npcm_i2c_irq_handle_ber() argument
1524 if (bus->ber_cnt < ULLONG_MAX) in npcm_i2c_irq_handle_ber()
1525 bus->ber_cnt++; in npcm_i2c_irq_handle_ber()
1526 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_irq_handle_ber()
1527 if (npcm_i2c_is_master(bus)) { in npcm_i2c_irq_handle_ber()
1528 npcm_i2c_master_abort(bus); in npcm_i2c_irq_handle_ber()
1530 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_ber()
1533 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_irq_handle_ber()
1535 bus->cmd_err = -EAGAIN; in npcm_i2c_irq_handle_ber()
1536 npcm_i2c_callback(bus, bus->stop_ind, npcm_i2c_get_index(bus)); in npcm_i2c_irq_handle_ber()
1538 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_ber()
1542 static void npcm_i2c_irq_handle_eob(struct npcm_i2c *bus) in npcm_i2c_irq_handle_eob() argument
1544 npcm_i2c_eob_int(bus, false); in npcm_i2c_irq_handle_eob()
1545 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_eob()
1546 npcm_i2c_callback(bus, bus->stop_ind, bus->rd_ind); in npcm_i2c_irq_handle_eob()
1550 static void npcm_i2c_irq_handle_stall_after_start(struct npcm_i2c *bus) in npcm_i2c_irq_handle_stall_after_start() argument
1552 if (npcm_i2c_is_quick(bus)) { in npcm_i2c_irq_handle_stall_after_start()
1553 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_handle_stall_after_start()
1554 bus->stop_ind = I2C_MASTER_DONE_IND; in npcm_i2c_irq_handle_stall_after_start()
1555 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_handle_stall_after_start()
1556 npcm_i2c_master_stop(bus); in npcm_i2c_irq_handle_stall_after_start()
1557 } else if ((bus->rd_size == 1) && !bus->read_block_use) { in npcm_i2c_irq_handle_stall_after_start()
1562 npcm_i2c_nack(bus); in npcm_i2c_irq_handle_stall_after_start()
1566 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_handle_stall_after_start()
1569 iowrite8(NPCM_I2CST_STASTR, bus->reg + NPCM_I2CST); in npcm_i2c_irq_handle_stall_after_start()
1573 static void npcm_i2c_irq_handle_sda(struct npcm_i2c *bus, u8 i2cst) in npcm_i2c_irq_handle_sda() argument
1577 if (!npcm_i2c_is_master(bus)) in npcm_i2c_irq_handle_sda()
1580 if (bus->state == I2C_IDLE) { in npcm_i2c_irq_handle_sda()
1581 bus->stop_ind = I2C_WAKE_UP_IND; in npcm_i2c_irq_handle_sda()
1583 if (npcm_i2c_is_quick(bus) || bus->read_block_use) in npcm_i2c_irq_handle_sda()
1588 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_handle_sda()
1590 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_handle_sda()
1598 if (bus->wr_size == 0 && bus->rd_size == 1) in npcm_i2c_irq_handle_sda()
1599 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_handle_sda()
1604 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_irq_handle_sda()
1606 fif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1611 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1615 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1624 if (bus->wr_size) in npcm_i2c_irq_handle_sda()
1625 npcm_i2c_set_fifo(bus, -1, bus->wr_size); in npcm_i2c_irq_handle_sda()
1627 npcm_i2c_set_fifo(bus, bus->rd_size, -1); in npcm_i2c_irq_handle_sda()
1629 bus->state = I2C_OPER_STARTED; in npcm_i2c_irq_handle_sda()
1631 if (npcm_i2c_is_quick(bus) || bus->wr_size) in npcm_i2c_irq_handle_sda()
1632 npcm_i2c_wr_byte(bus, bus->dest_addr); in npcm_i2c_irq_handle_sda()
1634 npcm_i2c_wr_byte(bus, bus->dest_addr | BIT(0)); in npcm_i2c_irq_handle_sda()
1638 bus->operation = I2C_WRITE_OPER; in npcm_i2c_irq_handle_sda()
1639 npcm_i2c_irq_master_handler_write(bus); in npcm_i2c_irq_handle_sda()
1641 bus->operation = I2C_READ_OPER; in npcm_i2c_irq_handle_sda()
1642 npcm_i2c_irq_master_handler_read(bus); in npcm_i2c_irq_handle_sda()
1647 static int npcm_i2c_int_master_handler(struct npcm_i2c *bus) in npcm_i2c_int_master_handler() argument
1652 i2cst = ioread8(bus->reg + NPCM_I2CST); in npcm_i2c_int_master_handler()
1655 npcm_i2c_irq_handle_nmatch(bus); in npcm_i2c_int_master_handler()
1660 npcm_i2c_irq_handle_nack(bus); in npcm_i2c_int_master_handler()
1666 npcm_i2c_irq_handle_ber(bus); in npcm_i2c_int_master_handler()
1672 ioread8(bus->reg + NPCM_I2CCTL1)) == 1) && in npcm_i2c_int_master_handler()
1674 ioread8(bus->reg + NPCM_I2CCST3)))) { in npcm_i2c_int_master_handler()
1675 npcm_i2c_irq_handle_eob(bus); in npcm_i2c_int_master_handler()
1681 npcm_i2c_irq_handle_stall_after_start(bus); in npcm_i2c_int_master_handler()
1687 (bus->fifo_use && in npcm_i2c_int_master_handler()
1688 (npcm_i2c_tx_fifo_empty(bus) || npcm_i2c_rx_fifo_full(bus)))) { in npcm_i2c_int_master_handler()
1689 npcm_i2c_irq_handle_sda(bus, i2cst); in npcm_i2c_int_master_handler()
1703 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_recovery_tgclk() local
1708 dev_dbg(bus->dev, "bus%d-0x%x recovery skipped, bus not stuck", in npcm_i2c_recovery_tgclk()
1709 bus->num, bus->dest_addr); in npcm_i2c_recovery_tgclk()
1710 npcm_i2c_reset(bus); in npcm_i2c_recovery_tgclk()
1714 npcm_i2c_int_enable(bus, false); in npcm_i2c_recovery_tgclk()
1715 npcm_i2c_disable(bus); in npcm_i2c_recovery_tgclk()
1716 npcm_i2c_enable(bus); in npcm_i2c_recovery_tgclk()
1717 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_recovery_tgclk()
1718 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_recovery_tgclk()
1719 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_recovery_tgclk()
1720 iowrite8(0, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_recovery_tgclk()
1721 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_recovery_tgclk()
1722 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_recovery_tgclk()
1725 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_recovery_tgclk()
1728 fif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_recovery_tgclk()
1731 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_recovery_tgclk()
1732 npcm_i2c_set_fifo(bus, -1, 0); in npcm_i2c_recovery_tgclk()
1737 iowrite8(NPCM_I2CCST_TGSCL, bus->reg + NPCM_I2CCST); in npcm_i2c_recovery_tgclk()
1749 npcm_i2c_wr_byte(bus, bus->dest_addr); in npcm_i2c_recovery_tgclk()
1750 npcm_i2c_master_start(bus); in npcm_i2c_recovery_tgclk()
1755 if (npcm_i2c_is_master(bus) > 0) { in npcm_i2c_recovery_tgclk()
1757 npcm_i2c_master_stop(bus); in npcm_i2c_recovery_tgclk()
1761 npcm_i2c_reset(bus); in npcm_i2c_recovery_tgclk()
1762 npcm_i2c_int_enable(bus, true); in npcm_i2c_recovery_tgclk()
1769 if (bus->rec_fail_cnt < ULLONG_MAX) in npcm_i2c_recovery_tgclk()
1770 bus->rec_fail_cnt++; in npcm_i2c_recovery_tgclk()
1772 if (bus->rec_succ_cnt < ULLONG_MAX) in npcm_i2c_recovery_tgclk()
1773 bus->rec_succ_cnt++; in npcm_i2c_recovery_tgclk()
1781 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_recovery_init() local
1782 struct i2c_bus_recovery_info *rinfo = &bus->rinfo; in npcm_i2c_recovery_init()
1811 static int npcm_i2c_init_clk(struct npcm_i2c *bus, u32 bus_freq_hz) in npcm_i2c_init_clk() argument
1822 src_clk_khz = bus->apb_clk / 1000; in npcm_i2c_init_clk()
1824 bus->bus_freq = bus_freq_hz; in npcm_i2c_init_clk()
1905 bus->reg + NPCM_I2CCTL2); in npcm_i2c_init_clk()
1909 bus->reg + NPCM_I2CCTL3); in npcm_i2c_init_clk()
1912 npcm_i2c_select_bank(bus, I2C_BANK_0); in npcm_i2c_init_clk()
1920 iowrite8(k1 / 2, bus->reg + NPCM_I2CSCLLT); in npcm_i2c_init_clk()
1921 iowrite8(k2 / 2, bus->reg + NPCM_I2CSCLHT); in npcm_i2c_init_clk()
1923 iowrite8(dbnct, bus->reg + NPCM_I2CCTL5); in npcm_i2c_init_clk()
1926 iowrite8(hldt, bus->reg + NPCM_I2CCTL4); in npcm_i2c_init_clk()
1929 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_init_clk()
1934 static int npcm_i2c_init_module(struct npcm_i2c *bus, enum i2c_mode mode, in npcm_i2c_init_module() argument
1941 if ((bus->state != I2C_DISABLE && bus->state != I2C_IDLE) || in npcm_i2c_init_module()
1945 npcm_i2c_int_enable(bus, false); in npcm_i2c_init_module()
1946 npcm_i2c_disable(bus); in npcm_i2c_init_module()
1949 if (FIELD_GET(I2C_VER_FIFO_EN, ioread8(bus->reg + I2C_VER))) { in npcm_i2c_init_module()
1950 bus->fifo_use = true; in npcm_i2c_init_module()
1951 npcm_i2c_select_bank(bus, I2C_BANK_0); in npcm_i2c_init_module()
1952 val = ioread8(bus->reg + NPCM_I2CFIF_CTL); in npcm_i2c_init_module()
1954 iowrite8(val, bus->reg + NPCM_I2CFIF_CTL); in npcm_i2c_init_module()
1955 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_init_module()
1957 bus->fifo_use = false; in npcm_i2c_init_module()
1961 ret = npcm_i2c_init_clk(bus, bus_freq_hz); in npcm_i2c_init_module()
1963 dev_err(bus->dev, "npcm_i2c_init_clk failed\n"); in npcm_i2c_init_module()
1968 npcm_i2c_enable(bus); in npcm_i2c_init_module()
1969 bus->state = I2C_IDLE; in npcm_i2c_init_module()
1970 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_init_module()
1972 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_init_module()
1974 npcm_i2c_reset(bus); in npcm_i2c_init_module()
1977 if ((npcm_i2c_get_SDA(&bus->adap) == 0) || (npcm_i2c_get_SCL(&bus->adap) == 0)) { in npcm_i2c_init_module()
1978 dev_err(bus->dev, "I2C%d init fail: lines are low\n", bus->num); in npcm_i2c_init_module()
1979 dev_err(bus->dev, "SDA=%d SCL=%d\n", npcm_i2c_get_SDA(&bus->adap), in npcm_i2c_init_module()
1980 npcm_i2c_get_SCL(&bus->adap)); in npcm_i2c_init_module()
1984 npcm_i2c_int_enable(bus, true); in npcm_i2c_init_module()
1988 static int __npcm_i2c_init(struct npcm_i2c *bus, struct platform_device *pdev) in __npcm_i2c_init() argument
1994 bus->state = I2C_DISABLE; in __npcm_i2c_init()
1995 bus->master_or_slave = I2C_SLAVE; in __npcm_i2c_init()
1996 bus->int_time_stamp = 0; in __npcm_i2c_init()
1998 bus->slave = NULL; in __npcm_i2c_init()
2008 ret = npcm_i2c_init_module(bus, I2C_MASTER, clk_freq_hz); in __npcm_i2c_init()
2019 struct npcm_i2c *bus = dev_id; in npcm_i2c_bus_irq() local
2021 if (npcm_i2c_is_master(bus)) in npcm_i2c_bus_irq()
2022 bus->master_or_slave = I2C_MASTER; in npcm_i2c_bus_irq()
2024 if (bus->master_or_slave == I2C_MASTER) { in npcm_i2c_bus_irq()
2025 bus->int_time_stamp = jiffies; in npcm_i2c_bus_irq()
2026 if (!npcm_i2c_int_master_handler(bus)) in npcm_i2c_bus_irq()
2030 if (bus->slave) { in npcm_i2c_bus_irq()
2031 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_bus_irq()
2032 if (npcm_i2c_int_slave_handler(bus)) in npcm_i2c_bus_irq()
2037 npcm_i2c_clear_master_status(bus); in npcm_i2c_bus_irq()
2042 static bool npcm_i2c_master_start_xmit(struct npcm_i2c *bus, in npcm_i2c_master_start_xmit() argument
2047 if (bus->state != I2C_IDLE) { in npcm_i2c_master_start_xmit()
2048 bus->cmd_err = -EBUSY; in npcm_i2c_master_start_xmit()
2051 bus->dest_addr = slave_addr << 1; in npcm_i2c_master_start_xmit()
2052 bus->wr_buf = write_data; in npcm_i2c_master_start_xmit()
2053 bus->wr_size = nwrite; in npcm_i2c_master_start_xmit()
2054 bus->wr_ind = 0; in npcm_i2c_master_start_xmit()
2055 bus->rd_buf = read_data; in npcm_i2c_master_start_xmit()
2056 bus->rd_size = nread; in npcm_i2c_master_start_xmit()
2057 bus->rd_ind = 0; in npcm_i2c_master_start_xmit()
2058 bus->PEC_use = 0; in npcm_i2c_master_start_xmit()
2062 bus->PEC_use = use_PEC; in npcm_i2c_master_start_xmit()
2064 bus->read_block_use = use_read_block; in npcm_i2c_master_start_xmit()
2066 bus->operation = I2C_READ_OPER; in npcm_i2c_master_start_xmit()
2068 bus->operation = I2C_WRITE_OPER; in npcm_i2c_master_start_xmit()
2069 if (bus->fifo_use) { in npcm_i2c_master_start_xmit()
2072 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_master_start_xmit()
2074 i2cfif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_master_start_xmit()
2077 iowrite8(i2cfif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_master_start_xmit()
2080 bus->state = I2C_IDLE; in npcm_i2c_master_start_xmit()
2081 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_master_start_xmit()
2082 npcm_i2c_master_start(bus); in npcm_i2c_master_start_xmit()
2089 struct npcm_i2c *bus = container_of(adap, struct npcm_i2c, adap); in npcm_i2c_master_xfer() local
2101 if (bus->state == I2C_DISABLE) { in npcm_i2c_master_xfer()
2102 dev_err(bus->dev, "I2C%d module is disabled", bus->num); in npcm_i2c_master_xfer()
2145 timeout_usec = (2 * 9 * USEC_PER_SEC / bus->bus_freq) * (2 + nread + nwrite); in npcm_i2c_master_xfer()
2146 timeout = max_t(unsigned long, bus->adap.timeout, usecs_to_jiffies(timeout_usec)); in npcm_i2c_master_xfer()
2148 dev_err(bus->dev, "i2c%d buffer too big\n", bus->num); in npcm_i2c_master_xfer()
2159 spin_lock_irqsave(&bus->lock, flags); in npcm_i2c_master_xfer()
2160 bus_busy = ioread8(bus->reg + NPCM_I2CCST) & NPCM_I2CCST_BB; in npcm_i2c_master_xfer()
2162 if (!bus_busy && bus->slave) in npcm_i2c_master_xfer()
2163 iowrite8((bus->slave->addr & 0x7F), in npcm_i2c_master_xfer()
2164 bus->reg + NPCM_I2CADDR1); in npcm_i2c_master_xfer()
2166 spin_unlock_irqrestore(&bus->lock, flags); in npcm_i2c_master_xfer()
2171 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_master_xfer()
2172 npcm_i2c_reset(bus); in npcm_i2c_master_xfer()
2177 npcm_i2c_init_params(bus); in npcm_i2c_master_xfer()
2178 bus->dest_addr = slave_addr; in npcm_i2c_master_xfer()
2179 bus->msgs = msgs; in npcm_i2c_master_xfer()
2180 bus->msgs_num = num; in npcm_i2c_master_xfer()
2181 bus->cmd_err = 0; in npcm_i2c_master_xfer()
2182 bus->read_block_use = read_block; in npcm_i2c_master_xfer()
2184 reinit_completion(&bus->cmd_complete); in npcm_i2c_master_xfer()
2186 npcm_i2c_int_enable(bus, true); in npcm_i2c_master_xfer()
2188 if (npcm_i2c_master_start_xmit(bus, slave_addr, nwrite, nread, in npcm_i2c_master_xfer()
2191 time_left = wait_for_completion_timeout(&bus->cmd_complete, in npcm_i2c_master_xfer()
2195 if (bus->timeout_cnt < ULLONG_MAX) in npcm_i2c_master_xfer()
2196 bus->timeout_cnt++; in npcm_i2c_master_xfer()
2197 if (bus->master_or_slave == I2C_MASTER) { in npcm_i2c_master_xfer()
2199 bus->cmd_err = -EIO; in npcm_i2c_master_xfer()
2200 bus->state = I2C_IDLE; in npcm_i2c_master_xfer()
2206 if (bus->cmd_err == -EAGAIN) in npcm_i2c_master_xfer()
2207 bus->cmd_err = i2c_recover_bus(adap); in npcm_i2c_master_xfer()
2214 else if (bus->cmd_err && in npcm_i2c_master_xfer()
2215 (bus->data->rxf_ctl_last_pec & ioread8(bus->reg + NPCM_I2CRXF_CTL))) in npcm_i2c_master_xfer()
2216 npcm_i2c_reset(bus); in npcm_i2c_master_xfer()
2219 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_master_xfer()
2220 npcm_i2c_eob_int(bus, false); in npcm_i2c_master_xfer()
2224 if (bus->slave) in npcm_i2c_master_xfer()
2225 iowrite8((bus->slave->addr & 0x7F) | NPCM_I2CADDR_SAEN, in npcm_i2c_master_xfer()
2226 bus->reg + NPCM_I2CADDR1); in npcm_i2c_master_xfer()
2228 npcm_i2c_int_enable(bus, false); in npcm_i2c_master_xfer()
2230 return bus->cmd_err; in npcm_i2c_master_xfer()
2261 struct npcm_i2c *bus) in npcm_i2c_init_debugfs() argument
2270 debugfs_create_u64("ber_cnt", 0444, d, &bus->ber_cnt); in npcm_i2c_init_debugfs()
2271 debugfs_create_u64("nack_cnt", 0444, d, &bus->nack_cnt); in npcm_i2c_init_debugfs()
2272 debugfs_create_u64("rec_succ_cnt", 0444, d, &bus->rec_succ_cnt); in npcm_i2c_init_debugfs()
2273 debugfs_create_u64("rec_fail_cnt", 0444, d, &bus->rec_fail_cnt); in npcm_i2c_init_debugfs()
2274 debugfs_create_u64("timeout_cnt", 0444, d, &bus->timeout_cnt); in npcm_i2c_init_debugfs()
2275 debugfs_create_u64("tx_complete_cnt", 0444, d, &bus->tx_complete_cnt); in npcm_i2c_init_debugfs()
2277 bus->debugfs = d; in npcm_i2c_init_debugfs()
2286 struct npcm_i2c *bus; in npcm_i2c_probe_bus() local
2291 bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL); in npcm_i2c_probe_bus()
2292 if (!bus) in npcm_i2c_probe_bus()
2295 bus->dev = &pdev->dev; in npcm_i2c_probe_bus()
2297 bus->data = of_device_get_match_data(dev); in npcm_i2c_probe_bus()
2298 if (!bus->data) { in npcm_i2c_probe_bus()
2303 bus->num = of_alias_get_id(pdev->dev.of_node, "i2c"); in npcm_i2c_probe_bus()
2308 bus->apb_clk = clk_get_rate(i2c_clk); in npcm_i2c_probe_bus()
2316 regmap_write(gcr_regmap, NPCM_I2CSEGCTL, bus->data->segctl_init_val); in npcm_i2c_probe_bus()
2318 bus->reg = devm_platform_ioremap_resource(pdev, 0); in npcm_i2c_probe_bus()
2319 if (IS_ERR(bus->reg)) in npcm_i2c_probe_bus()
2320 return PTR_ERR(bus->reg); in npcm_i2c_probe_bus()
2322 spin_lock_init(&bus->lock); in npcm_i2c_probe_bus()
2323 init_completion(&bus->cmd_complete); in npcm_i2c_probe_bus()
2325 adap = &bus->adap; in npcm_i2c_probe_bus()
2331 adap->algo_data = bus; in npcm_i2c_probe_bus()
2340 ret = devm_request_irq(bus->dev, irq, npcm_i2c_bus_irq, 0, in npcm_i2c_probe_bus()
2341 dev_name(bus->dev), bus); in npcm_i2c_probe_bus()
2345 ret = __npcm_i2c_init(bus, pdev); in npcm_i2c_probe_bus()
2351 i2c_set_adapdata(adap, bus); in npcm_i2c_probe_bus()
2353 snprintf(bus->adap.name, sizeof(bus->adap.name), "npcm_i2c_%d", in npcm_i2c_probe_bus()
2354 bus->num); in npcm_i2c_probe_bus()
2355 ret = i2c_add_numbered_adapter(&bus->adap); in npcm_i2c_probe_bus()
2359 platform_set_drvdata(pdev, bus); in npcm_i2c_probe_bus()
2360 npcm_i2c_init_debugfs(pdev, bus); in npcm_i2c_probe_bus()
2367 struct npcm_i2c *bus = platform_get_drvdata(pdev); in npcm_i2c_remove_bus() local
2369 debugfs_remove_recursive(bus->debugfs); in npcm_i2c_remove_bus()
2370 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_remove_bus()
2371 npcm_i2c_disable(bus); in npcm_i2c_remove_bus()
2372 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_remove_bus()
2373 i2c_del_adapter(&bus->adap); in npcm_i2c_remove_bus()