Lines Matching refs:id
131 #define cdns_i2c_readreg(offset) readl_relaxed(id->membase + offset)
132 #define cdns_i2c_writereg(val, offset) writel_relaxed(val, id->membase + offset)
226 static void cdns_i2c_clear_bus_hold(struct cdns_i2c *id) in cdns_i2c_clear_bus_hold() argument
233 static inline bool cdns_is_holdquirk(struct cdns_i2c *id, bool hold_wrkaround) in cdns_is_holdquirk() argument
236 (id->curr_recv_count == CDNS_I2C_FIFO_DEPTH + 1)); in cdns_is_holdquirk()
240 static void cdns_i2c_set_mode(enum cdns_i2c_mode mode, struct cdns_i2c *id) in cdns_i2c_set_mode() argument
249 id->dev_mode = mode; in cdns_i2c_set_mode()
250 id->slave_state = CDNS_I2C_SLAVE_STATE_IDLE; in cdns_i2c_set_mode()
255 cdns_i2c_writereg(id->ctrl_reg_diva_divb | in cdns_i2c_set_mode()
268 cdns_i2c_writereg(id->ctrl_reg_diva_divb & in cdns_i2c_set_mode()
273 cdns_i2c_writereg(id->slave->addr & CDNS_I2C_ADDR_MASK, in cdns_i2c_set_mode()
283 static void cdns_i2c_slave_rcv_data(struct cdns_i2c *id) in cdns_i2c_slave_rcv_data() argument
289 if (id->slave_state == CDNS_I2C_SLAVE_STATE_IDLE) { in cdns_i2c_slave_rcv_data()
290 id->slave_state = CDNS_I2C_SLAVE_STATE_RECV; in cdns_i2c_slave_rcv_data()
291 i2c_slave_event(id->slave, I2C_SLAVE_WRITE_REQUESTED, NULL); in cdns_i2c_slave_rcv_data()
300 i2c_slave_event(id->slave, I2C_SLAVE_WRITE_RECEIVED, &data); in cdns_i2c_slave_rcv_data()
304 static void cdns_i2c_slave_send_data(struct cdns_i2c *id) in cdns_i2c_slave_send_data() argument
309 if (id->slave_state == CDNS_I2C_SLAVE_STATE_IDLE) { in cdns_i2c_slave_send_data()
310 id->slave_state = CDNS_I2C_SLAVE_STATE_SEND; in cdns_i2c_slave_send_data()
311 i2c_slave_event(id->slave, I2C_SLAVE_READ_REQUESTED, &data); in cdns_i2c_slave_send_data()
313 i2c_slave_event(id->slave, I2C_SLAVE_READ_PROCESSED, &data); in cdns_i2c_slave_send_data()
331 struct cdns_i2c *id = ptr; in cdns_i2c_slave_isr() local
348 cdns_i2c_slave_send_data(id); in cdns_i2c_slave_isr()
351 id->slave_state = CDNS_I2C_SLAVE_STATE_IDLE; in cdns_i2c_slave_isr()
352 i2c_slave_event(id->slave, I2C_SLAVE_STOP, NULL); in cdns_i2c_slave_isr()
357 cdns_i2c_slave_rcv_data(id); in cdns_i2c_slave_isr()
360 cdns_i2c_slave_rcv_data(id); in cdns_i2c_slave_isr()
361 id->slave_state = CDNS_I2C_SLAVE_STATE_IDLE; in cdns_i2c_slave_isr()
362 i2c_slave_event(id->slave, I2C_SLAVE_STOP, NULL); in cdns_i2c_slave_isr()
369 id->slave_state = CDNS_I2C_SLAVE_STATE_IDLE; in cdns_i2c_slave_isr()
370 i2c_slave_event(id->slave, I2C_SLAVE_STOP, NULL); in cdns_i2c_slave_isr()
392 struct cdns_i2c *id = ptr; in cdns_i2c_master_isr() local
399 id->err_status = 0; in cdns_i2c_master_isr()
412 if (id->recv_count > id->curr_recv_count) in cdns_i2c_master_isr()
415 hold_quirk = (id->quirks & CDNS_I2C_BROKEN_HOLD_BIT) && updatetx; in cdns_i2c_master_isr()
418 if (id->p_recv_buf && in cdns_i2c_master_isr()
424 if (id->recv_count > 0) { in cdns_i2c_master_isr()
425 *(id->p_recv_buf)++ = in cdns_i2c_master_isr()
427 id->recv_count--; in cdns_i2c_master_isr()
428 id->curr_recv_count--; in cdns_i2c_master_isr()
435 if (id->recv_count <= CDNS_I2C_FIFO_DEPTH && in cdns_i2c_master_isr()
436 !id->bus_hold_flag) in cdns_i2c_master_isr()
437 cdns_i2c_clear_bus_hold(id); in cdns_i2c_master_isr()
440 dev_err(id->adap.dev.parent, in cdns_i2c_master_isr()
442 id->err_status |= CDNS_I2C_IXR_TO; in cdns_i2c_master_isr()
446 if (cdns_is_holdquirk(id, hold_quirk)) in cdns_i2c_master_isr()
457 if (cdns_is_holdquirk(id, hold_quirk)) { in cdns_i2c_master_isr()
460 (id->curr_recv_count - CDNS_I2C_FIFO_DEPTH)) in cdns_i2c_master_isr()
467 if (((int)(id->recv_count) - CDNS_I2C_FIFO_DEPTH) > in cdns_i2c_master_isr()
471 id->curr_recv_count = CDNS_I2C_TRANSFER_SIZE + in cdns_i2c_master_isr()
474 cdns_i2c_writereg(id->recv_count - in cdns_i2c_master_isr()
477 id->curr_recv_count = id->recv_count; in cdns_i2c_master_isr()
479 } else if (id->recv_count && !hold_quirk && in cdns_i2c_master_isr()
480 !id->curr_recv_count) { in cdns_i2c_master_isr()
483 cdns_i2c_writereg(id->p_msg->addr & CDNS_I2C_ADDR_MASK, in cdns_i2c_master_isr()
486 if (id->recv_count > CDNS_I2C_TRANSFER_SIZE) { in cdns_i2c_master_isr()
489 id->curr_recv_count = CDNS_I2C_TRANSFER_SIZE; in cdns_i2c_master_isr()
491 cdns_i2c_writereg(id->recv_count, in cdns_i2c_master_isr()
493 id->curr_recv_count = id->recv_count; in cdns_i2c_master_isr()
498 if ((isr_status & CDNS_I2C_IXR_COMP) && !id->recv_count) { in cdns_i2c_master_isr()
499 if (!id->bus_hold_flag) in cdns_i2c_master_isr()
500 cdns_i2c_clear_bus_hold(id); in cdns_i2c_master_isr()
508 if ((isr_status & CDNS_I2C_IXR_COMP) && !id->p_recv_buf) { in cdns_i2c_master_isr()
513 if (id->send_count) { in cdns_i2c_master_isr()
516 if (id->send_count > avail_bytes) in cdns_i2c_master_isr()
519 bytes_to_send = id->send_count; in cdns_i2c_master_isr()
523 (*(id->p_send_buf)++), in cdns_i2c_master_isr()
525 id->send_count--; in cdns_i2c_master_isr()
535 if (!id->send_count && !id->bus_hold_flag) in cdns_i2c_master_isr()
536 cdns_i2c_clear_bus_hold(id); in cdns_i2c_master_isr()
542 id->err_status |= isr_status & CDNS_I2C_IXR_ERR_INTR_MASK; in cdns_i2c_master_isr()
543 if (id->err_status) in cdns_i2c_master_isr()
547 complete(&id->xfer_done); in cdns_i2c_master_isr()
565 struct cdns_i2c *id = ptr; in cdns_i2c_isr() local
567 if (id->dev_mode == CDNS_I2C_MODE_SLAVE) in cdns_i2c_isr()
577 static void cdns_i2c_mrecv(struct cdns_i2c *id) in cdns_i2c_mrecv() argument
582 id->p_recv_buf = id->p_msg->buf; in cdns_i2c_mrecv()
583 id->recv_count = id->p_msg->len; in cdns_i2c_mrecv()
589 if (id->p_msg->flags & I2C_M_RECV_LEN) in cdns_i2c_mrecv()
590 id->recv_count = I2C_SMBUS_BLOCK_MAX + 1; in cdns_i2c_mrecv()
592 id->curr_recv_count = id->recv_count; in cdns_i2c_mrecv()
598 if (id->recv_count > CDNS_I2C_FIFO_DEPTH) in cdns_i2c_mrecv()
613 if (id->recv_count > CDNS_I2C_TRANSFER_SIZE) { in cdns_i2c_mrecv()
616 id->curr_recv_count = CDNS_I2C_TRANSFER_SIZE; in cdns_i2c_mrecv()
618 cdns_i2c_writereg(id->recv_count, CDNS_I2C_XFER_SIZE_OFFSET); in cdns_i2c_mrecv()
622 cdns_i2c_writereg(id->p_msg->addr & CDNS_I2C_ADDR_MASK, in cdns_i2c_mrecv()
625 if (!id->bus_hold_flag && in cdns_i2c_mrecv()
626 ((id->p_msg->flags & I2C_M_RECV_LEN) != I2C_M_RECV_LEN) && in cdns_i2c_mrecv()
627 (id->recv_count <= CDNS_I2C_FIFO_DEPTH)) in cdns_i2c_mrecv()
628 cdns_i2c_clear_bus_hold(id); in cdns_i2c_mrecv()
636 static void cdns_i2c_msend(struct cdns_i2c *id) in cdns_i2c_msend() argument
643 id->p_recv_buf = NULL; in cdns_i2c_msend()
644 id->p_send_buf = id->p_msg->buf; in cdns_i2c_msend()
645 id->send_count = id->p_msg->len; in cdns_i2c_msend()
656 if (id->send_count > CDNS_I2C_FIFO_DEPTH) in cdns_i2c_msend()
672 if (id->send_count > avail_bytes) in cdns_i2c_msend()
675 bytes_to_send = id->send_count; in cdns_i2c_msend()
678 cdns_i2c_writereg((*(id->p_send_buf)++), CDNS_I2C_DATA_OFFSET); in cdns_i2c_msend()
679 id->send_count--; in cdns_i2c_msend()
686 if (!id->bus_hold_flag && !id->send_count) in cdns_i2c_msend()
687 cdns_i2c_clear_bus_hold(id); in cdns_i2c_msend()
689 cdns_i2c_writereg(id->p_msg->addr & CDNS_I2C_ADDR_MASK, in cdns_i2c_msend()
704 struct cdns_i2c *id = adap->algo_data; in cdns_i2c_master_reset() local
724 static int cdns_i2c_process_msg(struct cdns_i2c *id, struct i2c_msg *msg, in cdns_i2c_process_msg() argument
730 id->p_msg = msg; in cdns_i2c_process_msg()
731 id->err_status = 0; in cdns_i2c_process_msg()
732 reinit_completion(&id->xfer_done); in cdns_i2c_process_msg()
748 cdns_i2c_mrecv(id); in cdns_i2c_process_msg()
750 cdns_i2c_msend(id); in cdns_i2c_process_msg()
753 time_left = wait_for_completion_timeout(&id->xfer_done, adap->timeout); in cdns_i2c_process_msg()
756 dev_err(id->adap.dev.parent, in cdns_i2c_process_msg()
765 if (id->err_status & CDNS_I2C_IXR_ARB_LOST) in cdns_i2c_process_msg()
786 struct cdns_i2c *id = adap->algo_data; in cdns_i2c_master_xfer() local
792 ret = pm_runtime_resume_and_get(id->dev); in cdns_i2c_master_xfer()
798 if (id->dev_mode == CDNS_I2C_MODE_SLAVE) { in cdns_i2c_master_xfer()
799 if (id->slave_state != CDNS_I2C_SLAVE_STATE_IDLE) in cdns_i2c_master_xfer()
803 cdns_i2c_set_mode(CDNS_I2C_MODE_MASTER, id); in cdns_i2c_master_xfer()
816 hold_quirk = !!(id->quirks & CDNS_I2C_BROKEN_HOLD_BIT); in cdns_i2c_master_xfer()
837 id->bus_hold_flag = 1; in cdns_i2c_master_xfer()
842 id->bus_hold_flag = 0; in cdns_i2c_master_xfer()
848 id->bus_hold_flag = 0; in cdns_i2c_master_xfer()
850 ret = cdns_i2c_process_msg(id, msgs, adap); in cdns_i2c_master_xfer()
855 if (id->err_status) { in cdns_i2c_master_xfer()
858 if (id->err_status & CDNS_I2C_IXR_NACK) { in cdns_i2c_master_xfer()
874 cdns_i2c_set_mode(CDNS_I2C_MODE_SLAVE, id); in cdns_i2c_master_xfer()
877 pm_runtime_mark_last_busy(id->dev); in cdns_i2c_master_xfer()
878 pm_runtime_put_autosuspend(id->dev); in cdns_i2c_master_xfer()
905 struct cdns_i2c *id = container_of(slave->adapter, struct cdns_i2c, in cdns_reg_slave() local
908 if (id->slave) in cdns_reg_slave()
914 ret = pm_runtime_resume_and_get(id->dev); in cdns_reg_slave()
919 id->slave = slave; in cdns_reg_slave()
922 cdns_i2c_set_mode(CDNS_I2C_MODE_SLAVE, id); in cdns_reg_slave()
929 struct cdns_i2c *id = container_of(slave->adapter, struct cdns_i2c, in cdns_unreg_slave() local
932 pm_runtime_put(id->dev); in cdns_unreg_slave()
935 id->slave = NULL; in cdns_unreg_slave()
938 cdns_i2c_set_mode(CDNS_I2C_MODE_MASTER, id); in cdns_unreg_slave()
1029 static int cdns_i2c_setclk(unsigned long clk_in, struct cdns_i2c *id) in cdns_i2c_setclk() argument
1034 unsigned long fscl = id->i2c_clk; in cdns_i2c_setclk()
1046 id->ctrl_reg_diva_divb = ctrl_reg & (CDNS_I2C_CR_DIVA_MASK | in cdns_i2c_setclk()
1072 struct cdns_i2c *id = to_cdns_i2c(nb); in cdns_i2c_clk_notifier_cb() local
1074 if (pm_runtime_suspended(id->dev)) in cdns_i2c_clk_notifier_cb()
1081 unsigned long fscl = id->i2c_clk; in cdns_i2c_clk_notifier_cb()
1087 dev_warn(id->adap.dev.parent, in cdns_i2c_clk_notifier_cb()
1094 cdns_i2c_setclk(ndata->new_rate, id); in cdns_i2c_clk_notifier_cb()
1099 id->input_clk = ndata->new_rate; in cdns_i2c_clk_notifier_cb()
1102 cdns_i2c_setclk(ndata->new_rate, id); in cdns_i2c_clk_notifier_cb()
1107 cdns_i2c_setclk(ndata->old_rate, id); in cdns_i2c_clk_notifier_cb()
1182 struct cdns_i2c *id; in cdns_i2c_probe() local
1186 id = devm_kzalloc(&pdev->dev, sizeof(*id), GFP_KERNEL); in cdns_i2c_probe()
1187 if (!id) in cdns_i2c_probe()
1190 id->dev = &pdev->dev; in cdns_i2c_probe()
1191 platform_set_drvdata(pdev, id); in cdns_i2c_probe()
1196 id->quirks = data->quirks; in cdns_i2c_probe()
1199 id->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &r_mem); in cdns_i2c_probe()
1200 if (IS_ERR(id->membase)) in cdns_i2c_probe()
1201 return PTR_ERR(id->membase); in cdns_i2c_probe()
1206 id->irq = ret; in cdns_i2c_probe()
1208 id->adap.owner = THIS_MODULE; in cdns_i2c_probe()
1209 id->adap.dev.of_node = pdev->dev.of_node; in cdns_i2c_probe()
1210 id->adap.algo = &cdns_i2c_algo; in cdns_i2c_probe()
1211 id->adap.timeout = CDNS_I2C_TIMEOUT; in cdns_i2c_probe()
1212 id->adap.retries = 3; /* Default retry value. */ in cdns_i2c_probe()
1213 id->adap.algo_data = id; in cdns_i2c_probe()
1214 id->adap.dev.parent = &pdev->dev; in cdns_i2c_probe()
1215 init_completion(&id->xfer_done); in cdns_i2c_probe()
1216 snprintf(id->adap.name, sizeof(id->adap.name), in cdns_i2c_probe()
1219 id->clk = devm_clk_get(&pdev->dev, NULL); in cdns_i2c_probe()
1220 if (IS_ERR(id->clk)) { in cdns_i2c_probe()
1221 if (PTR_ERR(id->clk) != -EPROBE_DEFER) in cdns_i2c_probe()
1223 return PTR_ERR(id->clk); in cdns_i2c_probe()
1225 ret = clk_prepare_enable(id->clk); in cdns_i2c_probe()
1229 pm_runtime_set_autosuspend_delay(id->dev, CNDS_I2C_PM_TIMEOUT); in cdns_i2c_probe()
1230 pm_runtime_use_autosuspend(id->dev); in cdns_i2c_probe()
1231 pm_runtime_set_active(id->dev); in cdns_i2c_probe()
1232 pm_runtime_enable(id->dev); in cdns_i2c_probe()
1234 id->clk_rate_change_nb.notifier_call = cdns_i2c_clk_notifier_cb; in cdns_i2c_probe()
1235 if (clk_notifier_register(id->clk, &id->clk_rate_change_nb)) in cdns_i2c_probe()
1237 id->input_clk = clk_get_rate(id->clk); in cdns_i2c_probe()
1240 &id->i2c_clk); in cdns_i2c_probe()
1241 if (ret || (id->i2c_clk > I2C_MAX_FAST_MODE_FREQ)) in cdns_i2c_probe()
1242 id->i2c_clk = I2C_MAX_STANDARD_MODE_FREQ; in cdns_i2c_probe()
1246 id->dev_mode = CDNS_I2C_MODE_MASTER; in cdns_i2c_probe()
1247 id->slave_state = CDNS_I2C_SLAVE_STATE_IDLE; in cdns_i2c_probe()
1251 ret = cdns_i2c_setclk(id->input_clk, id); in cdns_i2c_probe()
1253 dev_err(&pdev->dev, "invalid SCL clock: %u Hz\n", id->i2c_clk); in cdns_i2c_probe()
1258 ret = devm_request_irq(&pdev->dev, id->irq, cdns_i2c_isr, 0, in cdns_i2c_probe()
1259 DRIVER_NAME, id); in cdns_i2c_probe()
1261 dev_err(&pdev->dev, "cannot get irq %d\n", id->irq); in cdns_i2c_probe()
1274 ret = i2c_add_adapter(&id->adap); in cdns_i2c_probe()
1279 id->i2c_clk / 1000, (unsigned long)r_mem->start, id->irq); in cdns_i2c_probe()
1284 clk_disable_unprepare(id->clk); in cdns_i2c_probe()
1300 struct cdns_i2c *id = platform_get_drvdata(pdev); in cdns_i2c_remove() local
1306 i2c_del_adapter(&id->adap); in cdns_i2c_remove()
1307 clk_notifier_unregister(id->clk, &id->clk_rate_change_nb); in cdns_i2c_remove()
1308 clk_disable_unprepare(id->clk); in cdns_i2c_remove()