220 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_error()  local
229 	eifr = readb(&priv->regs->eifr);  in rcar_can_error()
231 		txerr = readb(&priv->regs->tecr);  in rcar_can_error()
232 		rxerr = readb(&priv->regs->recr);  in rcar_can_error()
243 		netdev_dbg(priv->ndev, "Bus error interrupt:\n");  in rcar_can_error()
247 		ecsr = readb(&priv->regs->ecsr);  in rcar_can_error()
249 			netdev_dbg(priv->ndev, "ACK Delimiter Error\n");  in rcar_can_error()
251 			writeb(~RCAR_CAN_ECSR_ADEF, &priv->regs->ecsr);  in rcar_can_error()
256 			netdev_dbg(priv->ndev, "Bit Error (dominant)\n");  in rcar_can_error()
258 			writeb(~RCAR_CAN_ECSR_BE0F, &priv->regs->ecsr);  in rcar_can_error()
263 			netdev_dbg(priv->ndev, "Bit Error (recessive)\n");  in rcar_can_error()
265 			writeb(~RCAR_CAN_ECSR_BE1F, &priv->regs->ecsr);  in rcar_can_error()
270 			netdev_dbg(priv->ndev, "CRC Error\n");  in rcar_can_error()
272 			writeb(~RCAR_CAN_ECSR_CEF, &priv->regs->ecsr);  in rcar_can_error()
277 			netdev_dbg(priv->ndev, "ACK Error\n");  in rcar_can_error()
279 			writeb(~RCAR_CAN_ECSR_AEF, &priv->regs->ecsr);  in rcar_can_error()
286 			netdev_dbg(priv->ndev, "Form Error\n");  in rcar_can_error()
288 			writeb(~RCAR_CAN_ECSR_FEF, &priv->regs->ecsr);  in rcar_can_error()
293 			netdev_dbg(priv->ndev, "Stuff Error\n");  in rcar_can_error()
295 			writeb(~RCAR_CAN_ECSR_SEF, &priv->regs->ecsr);  in rcar_can_error()
300 		priv->can.can_stats.bus_error++;  in rcar_can_error()
303 		writeb(~RCAR_CAN_EIFR_BEIF, &priv->regs->eifr);  in rcar_can_error()
306 		netdev_dbg(priv->ndev, "Error warning interrupt\n");  in rcar_can_error()
307 		priv->can.state = CAN_STATE_ERROR_WARNING;  in rcar_can_error()
308 		priv->can.can_stats.error_warning++;  in rcar_can_error()
310 		writeb(~RCAR_CAN_EIFR_EWIF, &priv->regs->eifr);  in rcar_can_error()
316 		netdev_dbg(priv->ndev, "Error passive interrupt\n");  in rcar_can_error()
317 		priv->can.state = CAN_STATE_ERROR_PASSIVE;  in rcar_can_error()
318 		priv->can.can_stats.error_passive++;  in rcar_can_error()
320 		writeb(~RCAR_CAN_EIFR_EPIF, &priv->regs->eifr);  in rcar_can_error()
326 		netdev_dbg(priv->ndev, "Bus-off entry interrupt\n");  in rcar_can_error()
328 		priv->ier = RCAR_CAN_IER_ERSIE;  in rcar_can_error()
329 		writeb(priv->ier, &priv->regs->ier);  in rcar_can_error()
330 		priv->can.state = CAN_STATE_BUS_OFF;  in rcar_can_error()
332 		writeb(~RCAR_CAN_EIFR_BOEIF, &priv->regs->eifr);  in rcar_can_error()
333 		priv->can.can_stats.bus_off++;  in rcar_can_error()
339 		netdev_dbg(priv->ndev, "Receive overrun error interrupt\n");  in rcar_can_error()
342 		writeb(~RCAR_CAN_EIFR_ORIF, &priv->regs->eifr);  in rcar_can_error()
349 		netdev_dbg(priv->ndev,  in rcar_can_error()
353 		writeb(~RCAR_CAN_EIFR_OLIF, &priv->regs->eifr);  in rcar_can_error()
369 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_tx_done()  local
374 		u8 unsent = readb(&priv->regs->tfcr);  in rcar_can_tx_done()
378 		if (priv->tx_head - priv->tx_tail <= unsent)  in rcar_can_tx_done()
381 		stats->tx_bytes += priv->tx_dlc[priv->tx_tail %  in rcar_can_tx_done()
383 		priv->tx_dlc[priv->tx_tail % RCAR_CAN_FIFO_DEPTH] = 0;  in rcar_can_tx_done()
384 		can_get_echo_skb(ndev, priv->tx_tail % RCAR_CAN_FIFO_DEPTH);  in rcar_can_tx_done()
385 		priv->tx_tail++;  in rcar_can_tx_done()
389 	isr = readb(&priv->regs->isr);  in rcar_can_tx_done()
390 	writeb(isr & ~RCAR_CAN_ISR_TXFF, &priv->regs->isr);  in rcar_can_tx_done()
397 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_interrupt()  local
400 	isr = readb(&priv->regs->isr);  in rcar_can_interrupt()
401 	if (!(isr & priv->ier))  in rcar_can_interrupt()
411 		if (napi_schedule_prep(&priv->napi)) {  in rcar_can_interrupt()
413 			priv->ier &= ~RCAR_CAN_IER_RXFIE;  in rcar_can_interrupt()
414 			writeb(priv->ier, &priv->regs->ier);  in rcar_can_interrupt()
415 			__napi_schedule(&priv->napi);  in rcar_can_interrupt()
424 	struct rcar_can_priv *priv = netdev_priv(dev);  in rcar_can_set_bittiming()  local
425 	struct can_bittiming *bt = &priv->can.bittiming;  in rcar_can_set_bittiming()
435 	writel((bcr << 8) | priv->clock_select, &priv->regs->bcr);  in rcar_can_set_bittiming()
440 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_start()  local
450 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_start()
452 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
455 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
457 		if (readw(&priv->regs->str) & RCAR_CAN_STR_RSTST)  in rcar_can_start()
466 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
469 	writel(0, &priv->regs->mkr_2_9[6]);  in rcar_can_start()
470 	writel(0, &priv->regs->mkr_2_9[7]);  in rcar_can_start()
472 	writel(0, &priv->regs->mkivlr1);  in rcar_can_start()
474 	writel(0, &priv->regs->fidcr[0]);  in rcar_can_start()
475 	writel(RCAR_CAN_FIDCR_IDE | RCAR_CAN_FIDCR_RTR, &priv->regs->fidcr[1]);  in rcar_can_start()
477 	writel(RCAR_CAN_MIER1_RXFIE | RCAR_CAN_MIER1_TXFIE, &priv->regs->mier1);  in rcar_can_start()
479 	priv->ier = RCAR_CAN_IER_ERSIE | RCAR_CAN_IER_RXFIE |  in rcar_can_start()
481 	writeb(priv->ier, &priv->regs->ier);  in rcar_can_start()
484 	writeb(RCAR_CAN_ECSR_EDPM, &priv->regs->ecsr);  in rcar_can_start()
487 	       (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING ?  in rcar_can_start()
489 	       RCAR_CAN_EIER_OLIE, &priv->regs->eier);  in rcar_can_start()
490 	priv->can.state = CAN_STATE_ERROR_ACTIVE;  in rcar_can_start()
493 	writew(ctlr & ~RCAR_CAN_CTLR_CANM, &priv->regs->ctlr);  in rcar_can_start()
495 		if (!(readw(&priv->regs->str) & RCAR_CAN_STR_RSTST))  in rcar_can_start()
499 	writeb(RCAR_CAN_RFCR_RFE, &priv->regs->rfcr);  in rcar_can_start()
500 	writeb(RCAR_CAN_TFCR_TFE, &priv->regs->tfcr);  in rcar_can_start()
505 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_open()  local
508 	err = clk_prepare_enable(priv->clk);  in rcar_can_open()
515 	err = clk_prepare_enable(priv->can_clk);  in rcar_can_open()
526 	napi_enable(&priv->napi);  in rcar_can_open()
538 	napi_disable(&priv->napi);  in rcar_can_open()
541 	clk_disable_unprepare(priv->can_clk);  in rcar_can_open()
543 	clk_disable_unprepare(priv->clk);  in rcar_can_open()
550 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_stop()  local
555 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_stop()
557 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_stop()
559 		if (readw(&priv->regs->str) & RCAR_CAN_STR_RSTST)  in rcar_can_stop()
562 	writel(0, &priv->regs->mier0);  in rcar_can_stop()
563 	writel(0, &priv->regs->mier1);  in rcar_can_stop()
564 	writeb(0, &priv->regs->ier);  in rcar_can_stop()
565 	writeb(0, &priv->regs->eier);  in rcar_can_stop()
568 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_stop()
569 	priv->can.state = CAN_STATE_STOPPED;  in rcar_can_stop()
574 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_close()  local
579 	napi_disable(&priv->napi);  in rcar_can_close()
580 	clk_disable_unprepare(priv->can_clk);  in rcar_can_close()
581 	clk_disable_unprepare(priv->clk);  in rcar_can_close()
590 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_start_xmit()  local
607 			       &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].data[i]);  in rcar_can_start_xmit()
610 	writel(data, &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].id);  in rcar_can_start_xmit()
612 	writeb(cf->can_dlc, &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].dlc);  in rcar_can_start_xmit()
614 	priv->tx_dlc[priv->tx_head % RCAR_CAN_FIFO_DEPTH] = cf->can_dlc;  in rcar_can_start_xmit()
615 	can_put_echo_skb(skb, ndev, priv->tx_head % RCAR_CAN_FIFO_DEPTH);  in rcar_can_start_xmit()
616 	priv->tx_head++;  in rcar_can_start_xmit()
621 	writeb(0xff, &priv->regs->tfpcr);  in rcar_can_start_xmit()
623 	if (priv->tx_head - priv->tx_tail >= RCAR_CAN_FIFO_DEPTH)  in rcar_can_start_xmit()
636 static void rcar_can_rx_pkt(struct rcar_can_priv *priv)  in rcar_can_rx_pkt()  argument
638 	struct net_device_stats *stats = &priv->ndev->stats;  in rcar_can_rx_pkt()
644 	skb = alloc_can_skb(priv->ndev, &cf);  in rcar_can_rx_pkt()
650 	data = readl(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].id);  in rcar_can_rx_pkt()
656 	dlc = readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].dlc);  in rcar_can_rx_pkt()
663 			readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].data[dlc]);  in rcar_can_rx_pkt()
666 	can_led_event(priv->ndev, CAN_LED_EVENT_RX);  in rcar_can_rx_pkt()
675 	struct rcar_can_priv *priv = container_of(napi,  in rcar_can_rx_poll()  local
682 		isr = readb(&priv->regs->isr);  in rcar_can_rx_poll()
685 			writeb(isr & ~RCAR_CAN_ISR_RXFF, &priv->regs->isr);  in rcar_can_rx_poll()
686 		rfcr = readb(&priv->regs->rfcr);  in rcar_can_rx_poll()
689 		rcar_can_rx_pkt(priv);  in rcar_can_rx_poll()
694 		writeb(0xff, &priv->regs->rfpcr);  in rcar_can_rx_poll()
699 		priv->ier |= RCAR_CAN_IER_RXFIE;  in rcar_can_rx_poll()
700 		writeb(priv->ier, &priv->regs->ier);  in rcar_can_rx_poll()
720 	struct rcar_can_priv *priv = netdev_priv(dev);  in rcar_can_get_berr_counter()  local
723 	err = clk_prepare_enable(priv->clk);  in rcar_can_get_berr_counter()
726 	bec->txerr = readb(&priv->regs->tecr);  in rcar_can_get_berr_counter()
727 	bec->rxerr = readb(&priv->regs->recr);  in rcar_can_get_berr_counter()
728 	clk_disable_unprepare(priv->clk);  in rcar_can_get_berr_counter()
741 	struct rcar_can_priv *priv;  in rcar_can_probe()  local
782 	priv = netdev_priv(ndev);  in rcar_can_probe()
784 	priv->clk = devm_clk_get(&pdev->dev, "clkp1");  in rcar_can_probe()
785 	if (IS_ERR(priv->clk)) {  in rcar_can_probe()
786 		err = PTR_ERR(priv->clk);  in rcar_can_probe()
797 	priv->can_clk = devm_clk_get(&pdev->dev, clock_names[clock_select]);  in rcar_can_probe()
798 	if (IS_ERR(priv->can_clk)) {  in rcar_can_probe()
799 		err = PTR_ERR(priv->can_clk);  in rcar_can_probe()
807 	priv->ndev = ndev;  in rcar_can_probe()
808 	priv->regs = addr;  in rcar_can_probe()
809 	priv->clock_select = clock_select;  in rcar_can_probe()
810 	priv->can.clock.freq = clk_get_rate(priv->can_clk);  in rcar_can_probe()
811 	priv->can.bittiming_const = &rcar_can_bittiming_const;  in rcar_can_probe()
812 	priv->can.do_set_mode = rcar_can_do_set_mode;  in rcar_can_probe()
813 	priv->can.do_get_berr_counter = rcar_can_get_berr_counter;  in rcar_can_probe()
814 	priv->can.ctrlmode_supported = CAN_CTRLMODE_BERR_REPORTING;  in rcar_can_probe()
818 	netif_napi_add(ndev, &priv->napi, rcar_can_rx_poll,  in rcar_can_probe()
830 		 priv->regs, ndev->irq);  in rcar_can_probe()
834 	netif_napi_del(&priv->napi);  in rcar_can_probe()
844 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_remove()  local
847 	netif_napi_del(&priv->napi);  in rcar_can_remove()
855 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_suspend()  local
862 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_suspend()
864 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_suspend()
866 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_suspend()
867 	priv->can.state = CAN_STATE_SLEEPING;  in rcar_can_suspend()
869 	clk_disable(priv->clk);  in rcar_can_suspend()
876 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_resume()  local
880 	err = clk_enable(priv->clk);  in rcar_can_resume()
886 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_resume()
888 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_resume()
890 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_resume()
891 	priv->can.state = CAN_STATE_ERROR_ACTIVE;  in rcar_can_resume()