Lines Matching refs:bus
319 static inline void npcm_i2c_select_bank(struct npcm_i2c *bus, in npcm_i2c_select_bank() argument
322 u8 i2cctl3 = ioread8(bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
328 iowrite8(i2cctl3, bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
331 static void npcm_i2c_init_params(struct npcm_i2c *bus) in npcm_i2c_init_params() argument
333 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_init_params()
334 bus->rd_size = 0; in npcm_i2c_init_params()
335 bus->wr_size = 0; in npcm_i2c_init_params()
336 bus->rd_ind = 0; in npcm_i2c_init_params()
337 bus->wr_ind = 0; in npcm_i2c_init_params()
338 bus->read_block_use = false; in npcm_i2c_init_params()
339 bus->int_time_stamp = 0; in npcm_i2c_init_params()
340 bus->PEC_use = false; in npcm_i2c_init_params()
341 bus->PEC_mask = 0; in npcm_i2c_init_params()
343 if (bus->slave) in npcm_i2c_init_params()
344 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_init_params()
348 static inline void npcm_i2c_wr_byte(struct npcm_i2c *bus, u8 data) in npcm_i2c_wr_byte() argument
350 iowrite8(data, bus->reg + NPCM_I2CSDA); in npcm_i2c_wr_byte()
353 static inline u8 npcm_i2c_rd_byte(struct npcm_i2c *bus) in npcm_i2c_rd_byte() argument
355 return ioread8(bus->reg + NPCM_I2CSDA); in npcm_i2c_rd_byte()
360 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_get_SCL() local
362 return !!(I2CCTL3_SCL_LVL & ioread8(bus->reg + NPCM_I2CCTL3)); in npcm_i2c_get_SCL()
367 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_get_SDA() local
369 return !!(I2CCTL3_SDA_LVL & ioread8(bus->reg + NPCM_I2CCTL3)); in npcm_i2c_get_SDA()
372 static inline u16 npcm_i2c_get_index(struct npcm_i2c *bus) in npcm_i2c_get_index() argument
374 if (bus->operation == I2C_READ_OPER) in npcm_i2c_get_index()
375 return bus->rd_ind; in npcm_i2c_get_index()
376 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_get_index()
377 return bus->wr_ind; in npcm_i2c_get_index()
382 static inline bool npcm_i2c_is_quick(struct npcm_i2c *bus) in npcm_i2c_is_quick() argument
384 return bus->wr_size == 0 && bus->rd_size == 0; in npcm_i2c_is_quick()
387 static void npcm_i2c_disable(struct npcm_i2c *bus) in npcm_i2c_disable() argument
396 iowrite8(0, bus->reg + npcm_i2caddr[i]); in npcm_i2c_disable()
400 i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2); in npcm_i2c_disable()
402 iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2); in npcm_i2c_disable()
404 bus->state = I2C_DISABLE; in npcm_i2c_disable()
407 static void npcm_i2c_enable(struct npcm_i2c *bus) in npcm_i2c_enable() argument
409 u8 i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2); in npcm_i2c_enable()
412 iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2); in npcm_i2c_enable()
413 bus->state = I2C_IDLE; in npcm_i2c_enable()
417 static inline void npcm_i2c_eob_int(struct npcm_i2c *bus, bool enable) in npcm_i2c_eob_int() argument
422 val = ioread8(bus->reg + NPCM_I2CCST3); in npcm_i2c_eob_int()
424 iowrite8(val, bus->reg + NPCM_I2CCST3); in npcm_i2c_eob_int()
426 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_eob_int()
432 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_eob_int()
435 static inline bool npcm_i2c_tx_fifo_empty(struct npcm_i2c *bus) in npcm_i2c_tx_fifo_empty() argument
439 tx_fifo_sts = ioread8(bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_tx_fifo_empty()
448 static inline bool npcm_i2c_rx_fifo_full(struct npcm_i2c *bus) in npcm_i2c_rx_fifo_full() argument
452 rx_fifo_sts = ioread8(bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_rx_fifo_full()
461 static inline void npcm_i2c_clear_fifo_int(struct npcm_i2c *bus) in npcm_i2c_clear_fifo_int() argument
465 val = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_clear_fifo_int()
467 iowrite8(val, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_clear_fifo_int()
470 static inline void npcm_i2c_clear_tx_fifo(struct npcm_i2c *bus) in npcm_i2c_clear_tx_fifo() argument
474 val = ioread8(bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_clear_tx_fifo()
476 iowrite8(val, bus->reg + NPCM_I2CTXF_STS); in npcm_i2c_clear_tx_fifo()
479 static inline void npcm_i2c_clear_rx_fifo(struct npcm_i2c *bus) in npcm_i2c_clear_rx_fifo() argument
483 val = ioread8(bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_clear_rx_fifo()
485 iowrite8(val, bus->reg + NPCM_I2CRXF_STS); in npcm_i2c_clear_rx_fifo()
488 static void npcm_i2c_int_enable(struct npcm_i2c *bus, bool enable) in npcm_i2c_int_enable() argument
492 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_int_enable()
498 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_int_enable()
501 static inline void npcm_i2c_master_start(struct npcm_i2c *bus) in npcm_i2c_master_start() argument
505 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_start()
508 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_start()
511 static inline void npcm_i2c_master_stop(struct npcm_i2c *bus) in npcm_i2c_master_stop() argument
521 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_stop()
524 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_master_stop()
526 if (!bus->fifo_use) in npcm_i2c_master_stop()
529 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_master_stop()
531 if (bus->operation == I2C_READ_OPER) in npcm_i2c_master_stop()
532 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_master_stop()
534 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_master_stop()
535 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_master_stop()
536 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_master_stop()
539 static inline void npcm_i2c_stall_after_start(struct npcm_i2c *bus, bool stall) in npcm_i2c_stall_after_start() argument
543 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_stall_after_start()
549 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_stall_after_start()
552 static inline void npcm_i2c_nack(struct npcm_i2c *bus) in npcm_i2c_nack() argument
556 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_nack()
559 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_nack()
562 static inline void npcm_i2c_clear_master_status(struct npcm_i2c *bus) in npcm_i2c_clear_master_status() argument
568 iowrite8(val, bus->reg + NPCM_I2CST); in npcm_i2c_clear_master_status()
572 static void npcm_i2c_slave_int_enable(struct npcm_i2c *bus, bool enable) in npcm_i2c_slave_int_enable() argument
577 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_int_enable()
583 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_int_enable()
586 static int npcm_i2c_slave_enable(struct npcm_i2c *bus, enum i2c_addr addr_type, in npcm_i2c_slave_enable() argument
595 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_enable()
600 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_slave_enable()
603 i2cctl3 = ioread8(bus->reg + NPCM_I2CCTL3); in npcm_i2c_slave_enable()
608 iowrite8(i2cctl3, bus->reg + NPCM_I2CCTL3); in npcm_i2c_slave_enable()
612 dev_err(bus->dev, "try to enable more than 2 SA not supported\n"); in npcm_i2c_slave_enable()
618 iowrite8(sa_reg, bus->reg + npcm_i2caddr[addr_type]); in npcm_i2c_slave_enable()
619 npcm_i2c_slave_int_enable(bus, enable); in npcm_i2c_slave_enable()
625 static void npcm_i2c_reset(struct npcm_i2c *bus) in npcm_i2c_reset() argument
636 i2cctl1 = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_reset()
638 npcm_i2c_disable(bus); in npcm_i2c_reset()
639 npcm_i2c_enable(bus); in npcm_i2c_reset()
643 iowrite8(i2cctl1, bus->reg + NPCM_I2CCTL1); in npcm_i2c_reset()
646 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_reset()
647 iowrite8(0xFF, bus->reg + NPCM_I2CST); in npcm_i2c_reset()
650 npcm_i2c_eob_int(bus, false); in npcm_i2c_reset()
653 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_reset()
656 if (bus->slave) { in npcm_i2c_reset()
657 addr = bus->slave->addr; in npcm_i2c_reset()
658 npcm_i2c_slave_enable(bus, I2C_SLAVE_ADDR1, addr, true); in npcm_i2c_reset()
663 npcm_i2c_clear_master_status(bus); in npcm_i2c_reset()
665 bus->state = I2C_IDLE; in npcm_i2c_reset()
668 static inline bool npcm_i2c_is_master(struct npcm_i2c *bus) in npcm_i2c_is_master() argument
670 return !!FIELD_GET(NPCM_I2CST_MASTER, ioread8(bus->reg + NPCM_I2CST)); in npcm_i2c_is_master()
673 static void npcm_i2c_callback(struct npcm_i2c *bus, in npcm_i2c_callback() argument
679 msgs = bus->msgs; in npcm_i2c_callback()
680 msgs_num = bus->msgs_num; in npcm_i2c_callback()
688 if (completion_done(&bus->cmd_complete)) in npcm_i2c_callback()
693 bus->cmd_err = bus->msgs_num; in npcm_i2c_callback()
697 if (bus->msgs) { in npcm_i2c_callback()
704 if (completion_done(&bus->cmd_complete) == false) in npcm_i2c_callback()
705 complete(&bus->cmd_complete); in npcm_i2c_callback()
710 bus->cmd_err = -ENXIO; in npcm_i2c_callback()
711 if (bus->master_or_slave == I2C_MASTER) in npcm_i2c_callback()
712 complete(&bus->cmd_complete); in npcm_i2c_callback()
717 bus->cmd_err = -EAGAIN; in npcm_i2c_callback()
718 if (bus->master_or_slave == I2C_MASTER) in npcm_i2c_callback()
719 complete(&bus->cmd_complete); in npcm_i2c_callback()
729 bus->operation = I2C_NO_OPER; in npcm_i2c_callback()
731 if (bus->slave) in npcm_i2c_callback()
732 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_callback()
736 static u8 npcm_i2c_fifo_usage(struct npcm_i2c *bus) in npcm_i2c_fifo_usage() argument
738 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_fifo_usage()
740 ioread8(bus->reg + NPCM_I2CTXF_STS)); in npcm_i2c_fifo_usage()
741 if (bus->operation == I2C_READ_OPER) in npcm_i2c_fifo_usage()
743 ioread8(bus->reg + NPCM_I2CRXF_STS)); in npcm_i2c_fifo_usage()
747 static void npcm_i2c_write_to_fifo_master(struct npcm_i2c *bus, u16 max_bytes) in npcm_i2c_write_to_fifo_master() argument
755 size_free_fifo = I2C_HW_FIFO_SIZE - npcm_i2c_fifo_usage(bus); in npcm_i2c_write_to_fifo_master()
757 if (bus->wr_ind < bus->wr_size) in npcm_i2c_write_to_fifo_master()
758 npcm_i2c_wr_byte(bus, bus->wr_buf[bus->wr_ind++]); in npcm_i2c_write_to_fifo_master()
760 npcm_i2c_wr_byte(bus, 0xFF); in npcm_i2c_write_to_fifo_master()
761 size_free_fifo = I2C_HW_FIFO_SIZE - npcm_i2c_fifo_usage(bus); in npcm_i2c_write_to_fifo_master()
770 static void npcm_i2c_set_fifo(struct npcm_i2c *bus, int nread, int nwrite) in npcm_i2c_set_fifo() argument
774 if (!bus->fifo_use) in npcm_i2c_set_fifo()
776 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_set_fifo()
777 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_set_fifo()
778 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_set_fifo()
793 if (bus->rd_ind == 0 && bus->read_block_use) { in npcm_i2c_set_fifo()
799 iowrite8(rxf_ctl, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_set_fifo()
806 iowrite8(I2C_HW_FIFO_SIZE, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_set_fifo()
808 iowrite8(nwrite, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_set_fifo()
810 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_set_fifo()
814 static void npcm_i2c_read_fifo(struct npcm_i2c *bus, u8 bytes_in_fifo) in npcm_i2c_read_fifo() argument
819 data = npcm_i2c_rd_byte(bus); in npcm_i2c_read_fifo()
820 if (bus->rd_ind < bus->rd_size) in npcm_i2c_read_fifo()
821 bus->rd_buf[bus->rd_ind++] = data; in npcm_i2c_read_fifo()
825 static void npcm_i2c_master_abort(struct npcm_i2c *bus) in npcm_i2c_master_abort() argument
828 if (!npcm_i2c_is_master(bus)) in npcm_i2c_master_abort()
831 npcm_i2c_eob_int(bus, true); in npcm_i2c_master_abort()
832 npcm_i2c_master_stop(bus); in npcm_i2c_master_abort()
833 npcm_i2c_clear_master_status(bus); in npcm_i2c_master_abort()
837 static u8 npcm_i2c_get_slave_addr(struct npcm_i2c *bus, enum i2c_addr addr_type) in npcm_i2c_get_slave_addr() argument
842 dev_err(bus->dev, "get slave: try to use more than 2 SA not supported\n"); in npcm_i2c_get_slave_addr()
844 slave_add = ioread8(bus->reg + npcm_i2caddr[(int)addr_type]); in npcm_i2c_get_slave_addr()
849 static int npcm_i2c_remove_slave_addr(struct npcm_i2c *bus, u8 slave_add) in npcm_i2c_remove_slave_addr() argument
857 if (ioread8(bus->reg + npcm_i2caddr[i]) == slave_add) in npcm_i2c_remove_slave_addr()
858 iowrite8(0, bus->reg + npcm_i2caddr[i]); in npcm_i2c_remove_slave_addr()
864 static void npcm_i2c_write_fifo_slave(struct npcm_i2c *bus, u16 max_bytes) in npcm_i2c_write_fifo_slave() argument
870 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_write_fifo_slave()
871 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_write_fifo_slave()
872 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_write_fifo_slave()
873 while (max_bytes-- && I2C_HW_FIFO_SIZE != npcm_i2c_fifo_usage(bus)) { in npcm_i2c_write_fifo_slave()
874 if (bus->slv_wr_size <= 0) in npcm_i2c_write_fifo_slave()
876 bus->slv_wr_ind = bus->slv_wr_ind % I2C_HW_FIFO_SIZE; in npcm_i2c_write_fifo_slave()
877 npcm_i2c_wr_byte(bus, bus->slv_wr_buf[bus->slv_wr_ind]); in npcm_i2c_write_fifo_slave()
878 bus->slv_wr_ind++; in npcm_i2c_write_fifo_slave()
879 bus->slv_wr_ind = bus->slv_wr_ind % I2C_HW_FIFO_SIZE; in npcm_i2c_write_fifo_slave()
880 bus->slv_wr_size--; in npcm_i2c_write_fifo_slave()
884 static void npcm_i2c_read_fifo_slave(struct npcm_i2c *bus, u8 bytes_in_fifo) in npcm_i2c_read_fifo_slave() argument
888 if (!bus->slave) in npcm_i2c_read_fifo_slave()
892 data = npcm_i2c_rd_byte(bus); in npcm_i2c_read_fifo_slave()
894 bus->slv_rd_ind = bus->slv_rd_ind % I2C_HW_FIFO_SIZE; in npcm_i2c_read_fifo_slave()
895 bus->slv_rd_buf[bus->slv_rd_ind] = data; in npcm_i2c_read_fifo_slave()
896 bus->slv_rd_ind++; in npcm_i2c_read_fifo_slave()
899 if (bus->slv_rd_ind == 1 && bus->read_block_use) in npcm_i2c_read_fifo_slave()
900 bus->slv_rd_size = data + bus->PEC_use + 1; in npcm_i2c_read_fifo_slave()
904 static int npcm_i2c_slave_get_wr_buf(struct npcm_i2c *bus) in npcm_i2c_slave_get_wr_buf() argument
909 int ret = bus->slv_wr_ind; in npcm_i2c_slave_get_wr_buf()
913 if (bus->slv_wr_size >= I2C_HW_FIFO_SIZE) in npcm_i2c_slave_get_wr_buf()
915 if (bus->state == I2C_SLAVE_MATCH) { in npcm_i2c_slave_get_wr_buf()
916 i2c_slave_event(bus->slave, I2C_SLAVE_READ_REQUESTED, &value); in npcm_i2c_slave_get_wr_buf()
917 bus->state = I2C_OPER_STARTED; in npcm_i2c_slave_get_wr_buf()
919 i2c_slave_event(bus->slave, I2C_SLAVE_READ_PROCESSED, &value); in npcm_i2c_slave_get_wr_buf()
921 ind = (bus->slv_wr_ind + bus->slv_wr_size) % I2C_HW_FIFO_SIZE; in npcm_i2c_slave_get_wr_buf()
922 bus->slv_wr_buf[ind] = value; in npcm_i2c_slave_get_wr_buf()
923 bus->slv_wr_size++; in npcm_i2c_slave_get_wr_buf()
928 static void npcm_i2c_slave_send_rd_buf(struct npcm_i2c *bus) in npcm_i2c_slave_send_rd_buf() argument
932 for (i = 0; i < bus->slv_rd_ind; i++) in npcm_i2c_slave_send_rd_buf()
933 i2c_slave_event(bus->slave, I2C_SLAVE_WRITE_RECEIVED, in npcm_i2c_slave_send_rd_buf()
934 &bus->slv_rd_buf[i]); in npcm_i2c_slave_send_rd_buf()
939 if (bus->slv_rd_ind) { in npcm_i2c_slave_send_rd_buf()
940 bus->slv_wr_size = 0; in npcm_i2c_slave_send_rd_buf()
941 bus->slv_wr_ind = 0; in npcm_i2c_slave_send_rd_buf()
944 bus->slv_rd_ind = 0; in npcm_i2c_slave_send_rd_buf()
945 bus->slv_rd_size = bus->adap.quirks->max_read_len; in npcm_i2c_slave_send_rd_buf()
947 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_slave_send_rd_buf()
948 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_slave_send_rd_buf()
951 static void npcm_i2c_slave_receive(struct npcm_i2c *bus, u16 nread, in npcm_i2c_slave_receive() argument
954 bus->state = I2C_OPER_STARTED; in npcm_i2c_slave_receive()
955 bus->operation = I2C_READ_OPER; in npcm_i2c_slave_receive()
956 bus->slv_rd_size = nread; in npcm_i2c_slave_receive()
957 bus->slv_rd_ind = 0; in npcm_i2c_slave_receive()
959 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_slave_receive()
960 iowrite8(I2C_HW_FIFO_SIZE, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_slave_receive()
961 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_slave_receive()
962 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_slave_receive()
965 static void npcm_i2c_slave_xmit(struct npcm_i2c *bus, u16 nwrite, in npcm_i2c_slave_xmit() argument
971 bus->operation = I2C_WRITE_OPER; in npcm_i2c_slave_xmit()
974 npcm_i2c_slave_get_wr_buf(bus); in npcm_i2c_slave_xmit()
975 npcm_i2c_write_fifo_slave(bus, nwrite); in npcm_i2c_slave_xmit()
989 static void npcm_i2c_slave_wr_buf_sync(struct npcm_i2c *bus) in npcm_i2c_slave_wr_buf_sync() argument
994 ioread8(bus->reg + NPCM_I2CTXF_STS)); in npcm_i2c_slave_wr_buf_sync()
998 bus->slv_wr_size >= I2C_HW_FIFO_SIZE) in npcm_i2c_slave_wr_buf_sync()
1002 bus->slv_wr_ind = bus->slv_wr_ind - left_in_fifo; in npcm_i2c_slave_wr_buf_sync()
1003 bus->slv_wr_size = bus->slv_wr_size + left_in_fifo; in npcm_i2c_slave_wr_buf_sync()
1005 if (bus->slv_wr_ind < 0) in npcm_i2c_slave_wr_buf_sync()
1006 bus->slv_wr_ind += I2C_HW_FIFO_SIZE; in npcm_i2c_slave_wr_buf_sync()
1009 static void npcm_i2c_slave_rd_wr(struct npcm_i2c *bus) in npcm_i2c_slave_rd_wr() argument
1011 if (NPCM_I2CST_XMIT & ioread8(bus->reg + NPCM_I2CST)) { in npcm_i2c_slave_rd_wr()
1016 bus->operation = I2C_WRITE_OPER; in npcm_i2c_slave_rd_wr()
1017 npcm_i2c_slave_xmit(bus, bus->adap.quirks->max_write_len, in npcm_i2c_slave_rd_wr()
1018 bus->slv_wr_buf); in npcm_i2c_slave_rd_wr()
1026 bus->operation = I2C_READ_OPER; in npcm_i2c_slave_rd_wr()
1027 npcm_i2c_read_fifo_slave(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_slave_rd_wr()
1028 bus->stop_ind = I2C_SLAVE_RCV_IND; in npcm_i2c_slave_rd_wr()
1029 npcm_i2c_slave_send_rd_buf(bus); in npcm_i2c_slave_rd_wr()
1030 npcm_i2c_slave_receive(bus, bus->adap.quirks->max_read_len, in npcm_i2c_slave_rd_wr()
1031 bus->slv_rd_buf); in npcm_i2c_slave_rd_wr()
1035 static irqreturn_t npcm_i2c_int_slave_handler(struct npcm_i2c *bus) in npcm_i2c_int_slave_handler() argument
1039 u8 i2cst = ioread8(bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1043 bus->stop_ind = I2C_NACK_IND; in npcm_i2c_int_slave_handler()
1044 npcm_i2c_slave_wr_buf_sync(bus); in npcm_i2c_int_slave_handler()
1045 if (bus->fifo_use) in npcm_i2c_int_slave_handler()
1048 bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1051 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_int_slave_handler()
1052 bus->operation = I2C_NO_OPER; in npcm_i2c_int_slave_handler()
1053 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1059 iowrite8(NPCM_I2CST_NEGACK, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1070 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_int_slave_handler()
1073 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1075 bus->state = I2C_IDLE; in npcm_i2c_int_slave_handler()
1081 if (completion_done(&bus->cmd_complete) == false) { in npcm_i2c_int_slave_handler()
1082 bus->cmd_err = -EIO; in npcm_i2c_int_slave_handler()
1083 complete(&bus->cmd_complete); in npcm_i2c_int_slave_handler()
1085 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1086 iowrite8(NPCM_I2CST_BER, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1092 u8 bytes_in_fifo = npcm_i2c_fifo_usage(bus); in npcm_i2c_int_slave_handler()
1094 bus->stop_ind = I2C_SLAVE_DONE_IND; in npcm_i2c_int_slave_handler()
1096 if (bus->operation == I2C_READ_OPER) in npcm_i2c_int_slave_handler()
1097 npcm_i2c_read_fifo_slave(bus, bytes_in_fifo); in npcm_i2c_int_slave_handler()
1100 npcm_i2c_slave_send_rd_buf(bus); in npcm_i2c_int_slave_handler()
1103 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_int_slave_handler()
1110 bus->operation = I2C_NO_OPER; in npcm_i2c_int_slave_handler()
1111 bus->own_slave_addr = 0xFF; in npcm_i2c_int_slave_handler()
1112 i2c_slave_event(bus->slave, I2C_SLAVE_STOP, 0); in npcm_i2c_int_slave_handler()
1113 iowrite8(NPCM_I2CST_SLVSTP, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1114 if (bus->fifo_use) { in npcm_i2c_int_slave_handler()
1115 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_int_slave_handler()
1116 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_int_slave_handler()
1117 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_int_slave_handler()
1120 bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1122 bus->state = I2C_IDLE; in npcm_i2c_int_slave_handler()
1127 if (bus->fifo_use && FIELD_GET(NPCM_I2CFIF_CTS_SLVRSTR, in npcm_i2c_int_slave_handler()
1128 ioread8(bus->reg + NPCM_I2CFIF_CTS))) { in npcm_i2c_int_slave_handler()
1129 bus->stop_ind = I2C_SLAVE_RESTART_IND; in npcm_i2c_int_slave_handler()
1130 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_int_slave_handler()
1131 if (bus->operation == I2C_READ_OPER) in npcm_i2c_int_slave_handler()
1132 npcm_i2c_read_fifo_slave(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_int_slave_handler()
1133 bus->operation = I2C_WRITE_OPER; in npcm_i2c_int_slave_handler()
1134 iowrite8(0, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_int_slave_handler()
1137 iowrite8(val, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_int_slave_handler()
1138 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1147 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_int_slave_handler()
1148 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_int_slave_handler()
1149 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_int_slave_handler()
1150 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_int_slave_handler()
1151 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_int_slave_handler()
1152 iowrite8(I2C_HW_FIFO_SIZE, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_int_slave_handler()
1154 bus->operation = I2C_WRITE_OPER; in npcm_i2c_int_slave_handler()
1156 i2c_slave_event(bus->slave, I2C_SLAVE_WRITE_REQUESTED, in npcm_i2c_int_slave_handler()
1158 bus->operation = I2C_READ_OPER; in npcm_i2c_int_slave_handler()
1160 if (bus->own_slave_addr == 0xFF) { in npcm_i2c_int_slave_handler()
1162 val = ioread8(bus->reg + NPCM_I2CCST); in npcm_i2c_int_slave_handler()
1169 i2ccst3 = ioread8(bus->reg + NPCM_I2CCST3); in npcm_i2c_int_slave_handler()
1170 i2ccst2 = ioread8(bus->reg + NPCM_I2CCST2); in npcm_i2c_int_slave_handler()
1181 addr = npcm_i2c_get_slave_addr(bus, eaddr); in npcm_i2c_int_slave_handler()
1183 bus->own_slave_addr = addr; in npcm_i2c_int_slave_handler()
1184 if (bus->PEC_mask & BIT(info)) in npcm_i2c_int_slave_handler()
1185 bus->PEC_use = true; in npcm_i2c_int_slave_handler()
1187 bus->PEC_use = false; in npcm_i2c_int_slave_handler()
1190 bus->own_slave_addr = 0; in npcm_i2c_int_slave_handler()
1192 bus->own_slave_addr = 0x61; in npcm_i2c_int_slave_handler()
1203 if ((bus->state == I2C_OPER_STARTED && in npcm_i2c_int_slave_handler()
1204 bus->operation == I2C_READ_OPER && in npcm_i2c_int_slave_handler()
1205 bus->stop_ind == I2C_SLAVE_XMIT_IND) || in npcm_i2c_int_slave_handler()
1206 bus->stop_ind == I2C_SLAVE_RCV_IND) { in npcm_i2c_int_slave_handler()
1208 bus->stop_ind = I2C_SLAVE_RESTART_IND; in npcm_i2c_int_slave_handler()
1213 bus->stop_ind = I2C_SLAVE_XMIT_IND; in npcm_i2c_int_slave_handler()
1215 bus->stop_ind = I2C_SLAVE_RCV_IND; in npcm_i2c_int_slave_handler()
1216 bus->state = I2C_SLAVE_MATCH; in npcm_i2c_int_slave_handler()
1217 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1218 iowrite8(NPCM_I2CST_NMATCH, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1224 (bus->fifo_use && in npcm_i2c_int_slave_handler()
1225 (npcm_i2c_tx_fifo_empty(bus) || npcm_i2c_rx_fifo_full(bus)))) { in npcm_i2c_int_slave_handler()
1226 npcm_i2c_slave_rd_wr(bus); in npcm_i2c_int_slave_handler()
1227 iowrite8(NPCM_I2CST_SDAST, bus->reg + NPCM_I2CST); in npcm_i2c_int_slave_handler()
1236 npcm_i2c_eob_int(bus, false); in npcm_i2c_int_slave_handler()
1237 npcm_i2c_clear_master_status(bus); in npcm_i2c_int_slave_handler()
1246 struct npcm_i2c *bus = i2c_get_adapdata(client->adapter); in npcm_i2c_reg_slave() local
1248 bus->slave = client; in npcm_i2c_reg_slave()
1250 if (!bus->slave) in npcm_i2c_reg_slave()
1256 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_reg_slave()
1258 npcm_i2c_init_params(bus); in npcm_i2c_reg_slave()
1259 bus->slv_rd_size = 0; in npcm_i2c_reg_slave()
1260 bus->slv_wr_size = 0; in npcm_i2c_reg_slave()
1261 bus->slv_rd_ind = 0; in npcm_i2c_reg_slave()
1262 bus->slv_wr_ind = 0; in npcm_i2c_reg_slave()
1264 bus->PEC_use = true; in npcm_i2c_reg_slave()
1266 dev_info(bus->dev, "i2c%d register slave SA=0x%x, PEC=%d\n", bus->num, in npcm_i2c_reg_slave()
1267 client->addr, bus->PEC_use); in npcm_i2c_reg_slave()
1269 npcm_i2c_slave_enable(bus, I2C_SLAVE_ADDR1, client->addr, true); in npcm_i2c_reg_slave()
1270 npcm_i2c_clear_fifo_int(bus); in npcm_i2c_reg_slave()
1271 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_reg_slave()
1272 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_reg_slave()
1273 npcm_i2c_slave_int_enable(bus, true); in npcm_i2c_reg_slave()
1275 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_reg_slave()
1281 struct npcm_i2c *bus = client->adapter->algo_data; in npcm_i2c_unreg_slave() local
1284 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1285 if (!bus->slave) { in npcm_i2c_unreg_slave()
1286 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1289 npcm_i2c_slave_int_enable(bus, false); in npcm_i2c_unreg_slave()
1290 npcm_i2c_remove_slave_addr(bus, client->addr); in npcm_i2c_unreg_slave()
1291 bus->slave = NULL; in npcm_i2c_unreg_slave()
1292 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_unreg_slave()
1297 static void npcm_i2c_master_fifo_read(struct npcm_i2c *bus) in npcm_i2c_master_fifo_read() argument
1303 fifo_bytes = npcm_i2c_fifo_usage(bus); in npcm_i2c_master_fifo_read()
1304 rcount = bus->rd_size - bus->rd_ind; in npcm_i2c_master_fifo_read()
1318 bus->state = I2C_STOP_PENDING; in npcm_i2c_master_fifo_read()
1319 bus->stop_ind = ind; in npcm_i2c_master_fifo_read()
1320 npcm_i2c_eob_int(bus, true); in npcm_i2c_master_fifo_read()
1322 npcm_i2c_master_stop(bus); in npcm_i2c_master_fifo_read()
1323 npcm_i2c_read_fifo(bus, fifo_bytes); in npcm_i2c_master_fifo_read()
1325 npcm_i2c_read_fifo(bus, fifo_bytes); in npcm_i2c_master_fifo_read()
1326 rcount = bus->rd_size - bus->rd_ind; in npcm_i2c_master_fifo_read()
1327 npcm_i2c_set_fifo(bus, rcount, -1); in npcm_i2c_master_fifo_read()
1331 static void npcm_i2c_irq_master_handler_write(struct npcm_i2c *bus) in npcm_i2c_irq_master_handler_write() argument
1335 if (bus->fifo_use) in npcm_i2c_irq_master_handler_write()
1336 npcm_i2c_clear_tx_fifo(bus); /* clear the TX fifo status bit */ in npcm_i2c_irq_master_handler_write()
1339 if (bus->wr_ind == bus->wr_size) { in npcm_i2c_irq_master_handler_write()
1340 if (bus->fifo_use && npcm_i2c_fifo_usage(bus) > 0) in npcm_i2c_irq_master_handler_write()
1350 if (bus->rd_size == 0) { in npcm_i2c_irq_master_handler_write()
1352 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_master_handler_write()
1353 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_master_handler_write()
1354 bus->stop_ind = I2C_MASTER_DONE_IND; in npcm_i2c_irq_master_handler_write()
1355 npcm_i2c_master_stop(bus); in npcm_i2c_irq_master_handler_write()
1357 npcm_i2c_wr_byte(bus, 0xFF); in npcm_i2c_irq_master_handler_write()
1361 npcm_i2c_set_fifo(bus, bus->rd_size, -1); in npcm_i2c_irq_master_handler_write()
1363 npcm_i2c_master_start(bus); in npcm_i2c_irq_master_handler_write()
1371 if (bus->rd_size == 1) in npcm_i2c_irq_master_handler_write()
1372 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_master_handler_write()
1375 bus->operation = I2C_READ_OPER; in npcm_i2c_irq_master_handler_write()
1377 npcm_i2c_wr_byte(bus, bus->dest_addr | 0x1); in npcm_i2c_irq_master_handler_write()
1381 if (!bus->fifo_use || bus->wr_size == 1) { in npcm_i2c_irq_master_handler_write()
1382 npcm_i2c_wr_byte(bus, bus->wr_buf[bus->wr_ind++]); in npcm_i2c_irq_master_handler_write()
1384 wcount = bus->wr_size - bus->wr_ind; in npcm_i2c_irq_master_handler_write()
1385 npcm_i2c_set_fifo(bus, -1, wcount); in npcm_i2c_irq_master_handler_write()
1387 npcm_i2c_write_to_fifo_master(bus, wcount); in npcm_i2c_irq_master_handler_write()
1392 static void npcm_i2c_irq_master_handler_read(struct npcm_i2c *bus) in npcm_i2c_irq_master_handler_read() argument
1398 block_extra_bytes_size = bus->read_block_use + bus->PEC_use; in npcm_i2c_irq_master_handler_read()
1404 if (bus->rd_ind == 0) { /* first byte handling: */ in npcm_i2c_irq_master_handler_read()
1405 if (bus->read_block_use) { in npcm_i2c_irq_master_handler_read()
1407 data = npcm_i2c_rd_byte(bus); in npcm_i2c_irq_master_handler_read()
1409 bus->rd_size = data + block_extra_bytes_size; in npcm_i2c_irq_master_handler_read()
1410 bus->rd_buf[bus->rd_ind++] = data; in npcm_i2c_irq_master_handler_read()
1413 if (bus->fifo_use) { in npcm_i2c_irq_master_handler_read()
1414 data = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_master_handler_read()
1416 iowrite8(data, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_master_handler_read()
1419 npcm_i2c_set_fifo(bus, bus->rd_size - 1, -1); in npcm_i2c_irq_master_handler_read()
1420 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_master_handler_read()
1422 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_irq_master_handler_read()
1423 npcm_i2c_master_fifo_read(bus); in npcm_i2c_irq_master_handler_read()
1426 if (bus->rd_size == block_extra_bytes_size && in npcm_i2c_irq_master_handler_read()
1427 bus->read_block_use) { in npcm_i2c_irq_master_handler_read()
1428 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_master_handler_read()
1429 bus->stop_ind = I2C_BLOCK_BYTES_ERR_IND; in npcm_i2c_irq_master_handler_read()
1430 bus->cmd_err = -EIO; in npcm_i2c_irq_master_handler_read()
1431 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_master_handler_read()
1432 npcm_i2c_master_stop(bus); in npcm_i2c_irq_master_handler_read()
1433 npcm_i2c_read_fifo(bus, npcm_i2c_fifo_usage(bus)); in npcm_i2c_irq_master_handler_read()
1435 npcm_i2c_master_fifo_read(bus); in npcm_i2c_irq_master_handler_read()
1440 static void npcm_i2c_irq_handle_nmatch(struct npcm_i2c *bus) in npcm_i2c_irq_handle_nmatch() argument
1442 iowrite8(NPCM_I2CST_NMATCH, bus->reg + NPCM_I2CST); in npcm_i2c_irq_handle_nmatch()
1443 npcm_i2c_nack(bus); in npcm_i2c_irq_handle_nmatch()
1444 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_irq_handle_nmatch()
1445 npcm_i2c_callback(bus, bus->stop_ind, npcm_i2c_get_index(bus)); in npcm_i2c_irq_handle_nmatch()
1449 static void npcm_i2c_irq_handle_nack(struct npcm_i2c *bus) in npcm_i2c_irq_handle_nack() argument
1453 if (bus->nack_cnt < ULLONG_MAX) in npcm_i2c_irq_handle_nack()
1454 bus->nack_cnt++; in npcm_i2c_irq_handle_nack()
1456 if (bus->fifo_use) { in npcm_i2c_irq_handle_nack()
1461 if (bus->operation == I2C_WRITE_OPER) in npcm_i2c_irq_handle_nack()
1462 bus->wr_ind -= npcm_i2c_fifo_usage(bus); in npcm_i2c_irq_handle_nack()
1465 iowrite8(NPCM_I2CFIF_CTS_CLR_FIFO, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_nack()
1469 bus->stop_ind = I2C_NACK_IND; in npcm_i2c_irq_handle_nack()
1471 if (npcm_i2c_is_master(bus)) { in npcm_i2c_irq_handle_nack()
1473 npcm_i2c_eob_int(bus, false); in npcm_i2c_irq_handle_nack()
1474 npcm_i2c_master_stop(bus); in npcm_i2c_irq_handle_nack()
1477 npcm_i2c_rd_byte(bus); in npcm_i2c_irq_handle_nack()
1483 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_nack()
1484 readx_poll_timeout_atomic(ioread8, bus->reg + NPCM_I2CCST, val, in npcm_i2c_irq_handle_nack()
1487 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_nack()
1489 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_nack()
1496 npcm_i2c_callback(bus, bus->stop_ind, bus->wr_ind); in npcm_i2c_irq_handle_nack()
1500 static void npcm_i2c_irq_handle_ber(struct npcm_i2c *bus) in npcm_i2c_irq_handle_ber() argument
1502 if (bus->ber_cnt < ULLONG_MAX) in npcm_i2c_irq_handle_ber()
1503 bus->ber_cnt++; in npcm_i2c_irq_handle_ber()
1504 bus->stop_ind = I2C_BUS_ERR_IND; in npcm_i2c_irq_handle_ber()
1505 if (npcm_i2c_is_master(bus)) { in npcm_i2c_irq_handle_ber()
1506 npcm_i2c_master_abort(bus); in npcm_i2c_irq_handle_ber()
1508 npcm_i2c_clear_master_status(bus); in npcm_i2c_irq_handle_ber()
1511 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_irq_handle_ber()
1513 bus->cmd_err = -EAGAIN; in npcm_i2c_irq_handle_ber()
1514 npcm_i2c_callback(bus, bus->stop_ind, npcm_i2c_get_index(bus)); in npcm_i2c_irq_handle_ber()
1516 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_ber()
1520 static void npcm_i2c_irq_handle_eob(struct npcm_i2c *bus) in npcm_i2c_irq_handle_eob() argument
1522 npcm_i2c_eob_int(bus, false); in npcm_i2c_irq_handle_eob()
1523 bus->state = I2C_IDLE; in npcm_i2c_irq_handle_eob()
1524 npcm_i2c_callback(bus, bus->stop_ind, bus->rd_ind); in npcm_i2c_irq_handle_eob()
1528 static void npcm_i2c_irq_handle_stall_after_start(struct npcm_i2c *bus) in npcm_i2c_irq_handle_stall_after_start() argument
1530 if (npcm_i2c_is_quick(bus)) { in npcm_i2c_irq_handle_stall_after_start()
1531 bus->state = I2C_STOP_PENDING; in npcm_i2c_irq_handle_stall_after_start()
1532 bus->stop_ind = I2C_MASTER_DONE_IND; in npcm_i2c_irq_handle_stall_after_start()
1533 npcm_i2c_eob_int(bus, true); in npcm_i2c_irq_handle_stall_after_start()
1534 npcm_i2c_master_stop(bus); in npcm_i2c_irq_handle_stall_after_start()
1535 } else if ((bus->rd_size == 1) && !bus->read_block_use) { in npcm_i2c_irq_handle_stall_after_start()
1540 npcm_i2c_nack(bus); in npcm_i2c_irq_handle_stall_after_start()
1544 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_handle_stall_after_start()
1547 iowrite8(NPCM_I2CST_STASTR, bus->reg + NPCM_I2CST); in npcm_i2c_irq_handle_stall_after_start()
1551 static void npcm_i2c_irq_handle_sda(struct npcm_i2c *bus, u8 i2cst) in npcm_i2c_irq_handle_sda() argument
1555 if (!npcm_i2c_is_master(bus)) in npcm_i2c_irq_handle_sda()
1558 if (bus->state == I2C_IDLE) { in npcm_i2c_irq_handle_sda()
1559 bus->stop_ind = I2C_WAKE_UP_IND; in npcm_i2c_irq_handle_sda()
1561 if (npcm_i2c_is_quick(bus) || bus->read_block_use) in npcm_i2c_irq_handle_sda()
1566 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_handle_sda()
1568 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_irq_handle_sda()
1576 if (bus->wr_size == 0 && bus->rd_size == 1) in npcm_i2c_irq_handle_sda()
1577 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_irq_handle_sda()
1582 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_irq_handle_sda()
1584 fif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1589 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1593 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_irq_handle_sda()
1602 if (bus->wr_size) in npcm_i2c_irq_handle_sda()
1603 npcm_i2c_set_fifo(bus, -1, bus->wr_size); in npcm_i2c_irq_handle_sda()
1605 npcm_i2c_set_fifo(bus, bus->rd_size, -1); in npcm_i2c_irq_handle_sda()
1607 bus->state = I2C_OPER_STARTED; in npcm_i2c_irq_handle_sda()
1609 if (npcm_i2c_is_quick(bus) || bus->wr_size) in npcm_i2c_irq_handle_sda()
1610 npcm_i2c_wr_byte(bus, bus->dest_addr); in npcm_i2c_irq_handle_sda()
1612 npcm_i2c_wr_byte(bus, bus->dest_addr | BIT(0)); in npcm_i2c_irq_handle_sda()
1616 bus->operation = I2C_WRITE_OPER; in npcm_i2c_irq_handle_sda()
1617 npcm_i2c_irq_master_handler_write(bus); in npcm_i2c_irq_handle_sda()
1619 bus->operation = I2C_READ_OPER; in npcm_i2c_irq_handle_sda()
1620 npcm_i2c_irq_master_handler_read(bus); in npcm_i2c_irq_handle_sda()
1625 static int npcm_i2c_int_master_handler(struct npcm_i2c *bus) in npcm_i2c_int_master_handler() argument
1630 i2cst = ioread8(bus->reg + NPCM_I2CST); in npcm_i2c_int_master_handler()
1633 npcm_i2c_irq_handle_nmatch(bus); in npcm_i2c_int_master_handler()
1638 npcm_i2c_irq_handle_nack(bus); in npcm_i2c_int_master_handler()
1644 npcm_i2c_irq_handle_ber(bus); in npcm_i2c_int_master_handler()
1650 ioread8(bus->reg + NPCM_I2CCTL1)) == 1) && in npcm_i2c_int_master_handler()
1652 ioread8(bus->reg + NPCM_I2CCST3)))) { in npcm_i2c_int_master_handler()
1653 npcm_i2c_irq_handle_eob(bus); in npcm_i2c_int_master_handler()
1659 npcm_i2c_irq_handle_stall_after_start(bus); in npcm_i2c_int_master_handler()
1665 (bus->fifo_use && in npcm_i2c_int_master_handler()
1666 (npcm_i2c_tx_fifo_empty(bus) || npcm_i2c_rx_fifo_full(bus)))) { in npcm_i2c_int_master_handler()
1667 npcm_i2c_irq_handle_sda(bus, i2cst); in npcm_i2c_int_master_handler()
1681 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_recovery_tgclk() local
1686 dev_dbg(bus->dev, "bus%d-0x%x recovery skipped, bus not stuck", in npcm_i2c_recovery_tgclk()
1687 bus->num, bus->dest_addr); in npcm_i2c_recovery_tgclk()
1688 npcm_i2c_reset(bus); in npcm_i2c_recovery_tgclk()
1692 npcm_i2c_int_enable(bus, false); in npcm_i2c_recovery_tgclk()
1693 npcm_i2c_disable(bus); in npcm_i2c_recovery_tgclk()
1694 npcm_i2c_enable(bus); in npcm_i2c_recovery_tgclk()
1695 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_recovery_tgclk()
1696 npcm_i2c_clear_tx_fifo(bus); in npcm_i2c_recovery_tgclk()
1697 npcm_i2c_clear_rx_fifo(bus); in npcm_i2c_recovery_tgclk()
1698 iowrite8(0, bus->reg + NPCM_I2CRXF_CTL); in npcm_i2c_recovery_tgclk()
1699 iowrite8(0, bus->reg + NPCM_I2CTXF_CTL); in npcm_i2c_recovery_tgclk()
1700 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_recovery_tgclk()
1703 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_recovery_tgclk()
1706 fif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_recovery_tgclk()
1709 iowrite8(fif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_recovery_tgclk()
1710 npcm_i2c_set_fifo(bus, -1, 0); in npcm_i2c_recovery_tgclk()
1715 iowrite8(NPCM_I2CCST_TGSCL, bus->reg + NPCM_I2CCST); in npcm_i2c_recovery_tgclk()
1727 npcm_i2c_wr_byte(bus, bus->dest_addr); in npcm_i2c_recovery_tgclk()
1728 npcm_i2c_master_start(bus); in npcm_i2c_recovery_tgclk()
1733 if (npcm_i2c_is_master(bus) > 0) { in npcm_i2c_recovery_tgclk()
1735 npcm_i2c_master_stop(bus); in npcm_i2c_recovery_tgclk()
1739 npcm_i2c_reset(bus); in npcm_i2c_recovery_tgclk()
1740 npcm_i2c_int_enable(bus, true); in npcm_i2c_recovery_tgclk()
1747 if (bus->rec_fail_cnt < ULLONG_MAX) in npcm_i2c_recovery_tgclk()
1748 bus->rec_fail_cnt++; in npcm_i2c_recovery_tgclk()
1750 if (bus->rec_succ_cnt < ULLONG_MAX) in npcm_i2c_recovery_tgclk()
1751 bus->rec_succ_cnt++; in npcm_i2c_recovery_tgclk()
1759 struct npcm_i2c *bus = container_of(_adap, struct npcm_i2c, adap); in npcm_i2c_recovery_init() local
1760 struct i2c_bus_recovery_info *rinfo = &bus->rinfo; in npcm_i2c_recovery_init()
1789 static int npcm_i2c_init_clk(struct npcm_i2c *bus, u32 bus_freq_hz) in npcm_i2c_init_clk() argument
1800 src_clk_khz = bus->apb_clk / 1000; in npcm_i2c_init_clk()
1802 bus->bus_freq = bus_freq_hz; in npcm_i2c_init_clk()
1883 bus->reg + NPCM_I2CCTL2); in npcm_i2c_init_clk()
1887 bus->reg + NPCM_I2CCTL3); in npcm_i2c_init_clk()
1890 npcm_i2c_select_bank(bus, I2C_BANK_0); in npcm_i2c_init_clk()
1898 iowrite8(k1 / 2, bus->reg + NPCM_I2CSCLLT); in npcm_i2c_init_clk()
1899 iowrite8(k2 / 2, bus->reg + NPCM_I2CSCLHT); in npcm_i2c_init_clk()
1901 iowrite8(dbnct, bus->reg + NPCM_I2CCTL5); in npcm_i2c_init_clk()
1904 iowrite8(hldt, bus->reg + NPCM_I2CCTL4); in npcm_i2c_init_clk()
1907 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_init_clk()
1912 static int npcm_i2c_init_module(struct npcm_i2c *bus, enum i2c_mode mode, in npcm_i2c_init_module() argument
1919 if ((bus->state != I2C_DISABLE && bus->state != I2C_IDLE) || in npcm_i2c_init_module()
1923 npcm_i2c_int_enable(bus, false); in npcm_i2c_init_module()
1924 npcm_i2c_disable(bus); in npcm_i2c_init_module()
1927 if (FIELD_GET(I2C_VER_FIFO_EN, ioread8(bus->reg + I2C_VER))) { in npcm_i2c_init_module()
1928 bus->fifo_use = true; in npcm_i2c_init_module()
1929 npcm_i2c_select_bank(bus, I2C_BANK_0); in npcm_i2c_init_module()
1930 val = ioread8(bus->reg + NPCM_I2CFIF_CTL); in npcm_i2c_init_module()
1932 iowrite8(val, bus->reg + NPCM_I2CFIF_CTL); in npcm_i2c_init_module()
1933 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_init_module()
1935 bus->fifo_use = false; in npcm_i2c_init_module()
1939 ret = npcm_i2c_init_clk(bus, bus_freq_hz); in npcm_i2c_init_module()
1941 dev_err(bus->dev, "npcm_i2c_init_clk failed\n"); in npcm_i2c_init_module()
1946 npcm_i2c_enable(bus); in npcm_i2c_init_module()
1947 bus->state = I2C_IDLE; in npcm_i2c_init_module()
1948 val = ioread8(bus->reg + NPCM_I2CCTL1); in npcm_i2c_init_module()
1950 iowrite8(val, bus->reg + NPCM_I2CCTL1); in npcm_i2c_init_module()
1952 npcm_i2c_reset(bus); in npcm_i2c_init_module()
1955 if ((npcm_i2c_get_SDA(&bus->adap) == 0) || (npcm_i2c_get_SCL(&bus->adap) == 0)) { in npcm_i2c_init_module()
1956 dev_err(bus->dev, "I2C%d init fail: lines are low\n", bus->num); in npcm_i2c_init_module()
1957 dev_err(bus->dev, "SDA=%d SCL=%d\n", npcm_i2c_get_SDA(&bus->adap), in npcm_i2c_init_module()
1958 npcm_i2c_get_SCL(&bus->adap)); in npcm_i2c_init_module()
1962 npcm_i2c_int_enable(bus, true); in npcm_i2c_init_module()
1966 static int __npcm_i2c_init(struct npcm_i2c *bus, struct platform_device *pdev) in __npcm_i2c_init() argument
1972 bus->state = I2C_DISABLE; in __npcm_i2c_init()
1973 bus->master_or_slave = I2C_SLAVE; in __npcm_i2c_init()
1974 bus->int_time_stamp = 0; in __npcm_i2c_init()
1976 bus->slave = NULL; in __npcm_i2c_init()
1986 ret = npcm_i2c_init_module(bus, I2C_MASTER, clk_freq_hz); in __npcm_i2c_init()
1997 struct npcm_i2c *bus = dev_id; in npcm_i2c_bus_irq() local
1999 if (npcm_i2c_is_master(bus)) in npcm_i2c_bus_irq()
2000 bus->master_or_slave = I2C_MASTER; in npcm_i2c_bus_irq()
2002 if (bus->master_or_slave == I2C_MASTER) { in npcm_i2c_bus_irq()
2003 bus->int_time_stamp = jiffies; in npcm_i2c_bus_irq()
2004 if (!npcm_i2c_int_master_handler(bus)) in npcm_i2c_bus_irq()
2008 if (bus->slave) { in npcm_i2c_bus_irq()
2009 bus->master_or_slave = I2C_SLAVE; in npcm_i2c_bus_irq()
2010 if (npcm_i2c_int_slave_handler(bus)) in npcm_i2c_bus_irq()
2015 npcm_i2c_clear_master_status(bus); in npcm_i2c_bus_irq()
2020 static bool npcm_i2c_master_start_xmit(struct npcm_i2c *bus, in npcm_i2c_master_start_xmit() argument
2025 if (bus->state != I2C_IDLE) { in npcm_i2c_master_start_xmit()
2026 bus->cmd_err = -EBUSY; in npcm_i2c_master_start_xmit()
2029 bus->dest_addr = slave_addr << 1; in npcm_i2c_master_start_xmit()
2030 bus->wr_buf = write_data; in npcm_i2c_master_start_xmit()
2031 bus->wr_size = nwrite; in npcm_i2c_master_start_xmit()
2032 bus->wr_ind = 0; in npcm_i2c_master_start_xmit()
2033 bus->rd_buf = read_data; in npcm_i2c_master_start_xmit()
2034 bus->rd_size = nread; in npcm_i2c_master_start_xmit()
2035 bus->rd_ind = 0; in npcm_i2c_master_start_xmit()
2036 bus->PEC_use = 0; in npcm_i2c_master_start_xmit()
2040 bus->PEC_use = use_PEC; in npcm_i2c_master_start_xmit()
2042 bus->read_block_use = use_read_block; in npcm_i2c_master_start_xmit()
2044 bus->operation = I2C_READ_OPER; in npcm_i2c_master_start_xmit()
2046 bus->operation = I2C_WRITE_OPER; in npcm_i2c_master_start_xmit()
2047 if (bus->fifo_use) { in npcm_i2c_master_start_xmit()
2050 npcm_i2c_select_bank(bus, I2C_BANK_1); in npcm_i2c_master_start_xmit()
2052 i2cfif_cts = ioread8(bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_master_start_xmit()
2055 iowrite8(i2cfif_cts, bus->reg + NPCM_I2CFIF_CTS); in npcm_i2c_master_start_xmit()
2058 bus->state = I2C_IDLE; in npcm_i2c_master_start_xmit()
2059 npcm_i2c_stall_after_start(bus, true); in npcm_i2c_master_start_xmit()
2060 npcm_i2c_master_start(bus); in npcm_i2c_master_start_xmit()
2067 struct npcm_i2c *bus = container_of(adap, struct npcm_i2c, adap); in npcm_i2c_master_xfer() local
2079 if (bus->state == I2C_DISABLE) { in npcm_i2c_master_xfer()
2080 dev_err(bus->dev, "I2C%d module is disabled", bus->num); in npcm_i2c_master_xfer()
2123 timeout_usec = (2 * 9 * USEC_PER_SEC / bus->bus_freq) * (2 + nread + nwrite); in npcm_i2c_master_xfer()
2124 timeout = max_t(unsigned long, bus->adap.timeout, usecs_to_jiffies(timeout_usec)); in npcm_i2c_master_xfer()
2126 dev_err(bus->dev, "i2c%d buffer too big\n", bus->num); in npcm_i2c_master_xfer()
2137 spin_lock_irqsave(&bus->lock, flags); in npcm_i2c_master_xfer()
2138 bus_busy = ioread8(bus->reg + NPCM_I2CCST) & NPCM_I2CCST_BB; in npcm_i2c_master_xfer()
2140 if (!bus_busy && bus->slave) in npcm_i2c_master_xfer()
2141 iowrite8((bus->slave->addr & 0x7F), in npcm_i2c_master_xfer()
2142 bus->reg + NPCM_I2CADDR1); in npcm_i2c_master_xfer()
2144 spin_unlock_irqrestore(&bus->lock, flags); in npcm_i2c_master_xfer()
2149 iowrite8(NPCM_I2CCST_BB, bus->reg + NPCM_I2CCST); in npcm_i2c_master_xfer()
2150 npcm_i2c_reset(bus); in npcm_i2c_master_xfer()
2155 npcm_i2c_init_params(bus); in npcm_i2c_master_xfer()
2156 bus->dest_addr = slave_addr; in npcm_i2c_master_xfer()
2157 bus->msgs = msgs; in npcm_i2c_master_xfer()
2158 bus->msgs_num = num; in npcm_i2c_master_xfer()
2159 bus->cmd_err = 0; in npcm_i2c_master_xfer()
2160 bus->read_block_use = read_block; in npcm_i2c_master_xfer()
2162 reinit_completion(&bus->cmd_complete); in npcm_i2c_master_xfer()
2164 npcm_i2c_int_enable(bus, true); in npcm_i2c_master_xfer()
2166 if (npcm_i2c_master_start_xmit(bus, slave_addr, nwrite, nread, in npcm_i2c_master_xfer()
2169 time_left = wait_for_completion_timeout(&bus->cmd_complete, in npcm_i2c_master_xfer()
2173 if (bus->timeout_cnt < ULLONG_MAX) in npcm_i2c_master_xfer()
2174 bus->timeout_cnt++; in npcm_i2c_master_xfer()
2175 if (bus->master_or_slave == I2C_MASTER) { in npcm_i2c_master_xfer()
2177 bus->cmd_err = -EIO; in npcm_i2c_master_xfer()
2178 bus->state = I2C_IDLE; in npcm_i2c_master_xfer()
2184 if (bus->cmd_err == -EAGAIN) in npcm_i2c_master_xfer()
2185 bus->cmd_err = i2c_recover_bus(adap); in npcm_i2c_master_xfer()
2192 else if (bus->cmd_err && in npcm_i2c_master_xfer()
2193 (NPCM_I2CRXF_CTL_LAST_PEC & ioread8(bus->reg + NPCM_I2CRXF_CTL))) in npcm_i2c_master_xfer()
2194 npcm_i2c_reset(bus); in npcm_i2c_master_xfer()
2197 npcm_i2c_stall_after_start(bus, false); in npcm_i2c_master_xfer()
2198 npcm_i2c_eob_int(bus, false); in npcm_i2c_master_xfer()
2202 if (bus->slave) in npcm_i2c_master_xfer()
2203 iowrite8((bus->slave->addr & 0x7F) | NPCM_I2CADDR_SAEN, in npcm_i2c_master_xfer()
2204 bus->reg + NPCM_I2CADDR1); in npcm_i2c_master_xfer()
2206 npcm_i2c_int_enable(bus, false); in npcm_i2c_master_xfer()
2208 return bus->cmd_err; in npcm_i2c_master_xfer()
2239 struct npcm_i2c *bus) in npcm_i2c_init_debugfs() argument
2248 debugfs_create_u64("ber_cnt", 0444, d, &bus->ber_cnt); in npcm_i2c_init_debugfs()
2249 debugfs_create_u64("nack_cnt", 0444, d, &bus->nack_cnt); in npcm_i2c_init_debugfs()
2250 debugfs_create_u64("rec_succ_cnt", 0444, d, &bus->rec_succ_cnt); in npcm_i2c_init_debugfs()
2251 debugfs_create_u64("rec_fail_cnt", 0444, d, &bus->rec_fail_cnt); in npcm_i2c_init_debugfs()
2252 debugfs_create_u64("timeout_cnt", 0444, d, &bus->timeout_cnt); in npcm_i2c_init_debugfs()
2254 bus->debugfs = d; in npcm_i2c_init_debugfs()
2259 struct npcm_i2c *bus; in npcm_i2c_probe_bus() local
2267 bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL); in npcm_i2c_probe_bus()
2268 if (!bus) in npcm_i2c_probe_bus()
2271 bus->dev = &pdev->dev; in npcm_i2c_probe_bus()
2273 bus->num = of_alias_get_id(pdev->dev.of_node, "i2c"); in npcm_i2c_probe_bus()
2278 bus->apb_clk = clk_get_rate(i2c_clk); in npcm_i2c_probe_bus()
2289 bus->reg = devm_platform_ioremap_resource(pdev, 0); in npcm_i2c_probe_bus()
2290 if (IS_ERR(bus->reg)) in npcm_i2c_probe_bus()
2291 return PTR_ERR(bus->reg); in npcm_i2c_probe_bus()
2293 spin_lock_init(&bus->lock); in npcm_i2c_probe_bus()
2294 init_completion(&bus->cmd_complete); in npcm_i2c_probe_bus()
2296 adap = &bus->adap; in npcm_i2c_probe_bus()
2302 adap->algo_data = bus; in npcm_i2c_probe_bus()
2311 ret = devm_request_irq(bus->dev, irq, npcm_i2c_bus_irq, 0, in npcm_i2c_probe_bus()
2312 dev_name(bus->dev), bus); in npcm_i2c_probe_bus()
2316 ret = __npcm_i2c_init(bus, pdev); in npcm_i2c_probe_bus()
2322 i2c_set_adapdata(adap, bus); in npcm_i2c_probe_bus()
2324 snprintf(bus->adap.name, sizeof(bus->adap.name), "npcm_i2c_%d", in npcm_i2c_probe_bus()
2325 bus->num); in npcm_i2c_probe_bus()
2326 ret = i2c_add_numbered_adapter(&bus->adap); in npcm_i2c_probe_bus()
2330 platform_set_drvdata(pdev, bus); in npcm_i2c_probe_bus()
2331 npcm_i2c_init_debugfs(pdev, bus); in npcm_i2c_probe_bus()
2338 struct npcm_i2c *bus = platform_get_drvdata(pdev); in npcm_i2c_remove_bus() local
2340 debugfs_remove_recursive(bus->debugfs); in npcm_i2c_remove_bus()
2341 spin_lock_irqsave(&bus->lock, lock_flags); in npcm_i2c_remove_bus()
2342 npcm_i2c_disable(bus); in npcm_i2c_remove_bus()
2343 spin_unlock_irqrestore(&bus->lock, lock_flags); in npcm_i2c_remove_bus()
2344 i2c_del_adapter(&bus->adap); in npcm_i2c_remove_bus()