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()
248 		ecsr = readb(&priv->regs->ecsr);  in rcar_can_error()
250 			netdev_dbg(priv->ndev, "ACK Delimiter Error\n");  in rcar_can_error()
252 			writeb(~RCAR_CAN_ECSR_ADEF, &priv->regs->ecsr);  in rcar_can_error()
257 			netdev_dbg(priv->ndev, "Bit Error (dominant)\n");  in rcar_can_error()
259 			writeb(~RCAR_CAN_ECSR_BE0F, &priv->regs->ecsr);  in rcar_can_error()
264 			netdev_dbg(priv->ndev, "Bit Error (recessive)\n");  in rcar_can_error()
266 			writeb(~RCAR_CAN_ECSR_BE1F, &priv->regs->ecsr);  in rcar_can_error()
271 			netdev_dbg(priv->ndev, "CRC Error\n");  in rcar_can_error()
273 			writeb(~RCAR_CAN_ECSR_CEF, &priv->regs->ecsr);  in rcar_can_error()
278 			netdev_dbg(priv->ndev, "ACK Error\n");  in rcar_can_error()
280 			writeb(~RCAR_CAN_ECSR_AEF, &priv->regs->ecsr);  in rcar_can_error()
287 			netdev_dbg(priv->ndev, "Form Error\n");  in rcar_can_error()
289 			writeb(~RCAR_CAN_ECSR_FEF, &priv->regs->ecsr);  in rcar_can_error()
294 			netdev_dbg(priv->ndev, "Stuff Error\n");  in rcar_can_error()
296 			writeb(~RCAR_CAN_ECSR_SEF, &priv->regs->ecsr);  in rcar_can_error()
301 		priv->can.can_stats.bus_error++;  in rcar_can_error()
304 		writeb(~RCAR_CAN_EIFR_BEIF, &priv->regs->eifr);  in rcar_can_error()
307 		netdev_dbg(priv->ndev, "Error warning interrupt\n");  in rcar_can_error()
308 		priv->can.state = CAN_STATE_ERROR_WARNING;  in rcar_can_error()
309 		priv->can.can_stats.error_warning++;  in rcar_can_error()
311 		writeb(~RCAR_CAN_EIFR_EWIF, &priv->regs->eifr);  in rcar_can_error()
317 		netdev_dbg(priv->ndev, "Error passive interrupt\n");  in rcar_can_error()
318 		priv->can.state = CAN_STATE_ERROR_PASSIVE;  in rcar_can_error()
319 		priv->can.can_stats.error_passive++;  in rcar_can_error()
321 		writeb(~RCAR_CAN_EIFR_EPIF, &priv->regs->eifr);  in rcar_can_error()
327 		netdev_dbg(priv->ndev, "Bus-off entry interrupt\n");  in rcar_can_error()
329 		priv->ier = RCAR_CAN_IER_ERSIE;  in rcar_can_error()
330 		writeb(priv->ier, &priv->regs->ier);  in rcar_can_error()
331 		priv->can.state = CAN_STATE_BUS_OFF;  in rcar_can_error()
333 		writeb(~RCAR_CAN_EIFR_BOEIF, &priv->regs->eifr);  in rcar_can_error()
334 		priv->can.can_stats.bus_off++;  in rcar_can_error()
340 		netdev_dbg(priv->ndev, "Receive overrun error interrupt\n");  in rcar_can_error()
343 		writeb(~RCAR_CAN_EIFR_ORIF, &priv->regs->eifr);  in rcar_can_error()
350 		netdev_dbg(priv->ndev,  in rcar_can_error()
354 		writeb(~RCAR_CAN_EIFR_OLIF, &priv->regs->eifr);  in rcar_can_error()
370 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_tx_done()  local
375 		u8 unsent = readb(&priv->regs->tfcr);  in rcar_can_tx_done()
379 		if (priv->tx_head - priv->tx_tail <= unsent)  in rcar_can_tx_done()
382 		stats->tx_bytes += priv->tx_dlc[priv->tx_tail %  in rcar_can_tx_done()
384 		priv->tx_dlc[priv->tx_tail % RCAR_CAN_FIFO_DEPTH] = 0;  in rcar_can_tx_done()
385 		can_get_echo_skb(ndev, priv->tx_tail % RCAR_CAN_FIFO_DEPTH);  in rcar_can_tx_done()
386 		priv->tx_tail++;  in rcar_can_tx_done()
390 	isr = readb(&priv->regs->isr);  in rcar_can_tx_done()
391 	writeb(isr & ~RCAR_CAN_ISR_TXFF, &priv->regs->isr);  in rcar_can_tx_done()
398 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_interrupt()  local
401 	isr = readb(&priv->regs->isr);  in rcar_can_interrupt()
402 	if (!(isr & priv->ier))  in rcar_can_interrupt()
412 		if (napi_schedule_prep(&priv->napi)) {  in rcar_can_interrupt()
414 			priv->ier &= ~RCAR_CAN_IER_RXFIE;  in rcar_can_interrupt()
415 			writeb(priv->ier, &priv->regs->ier);  in rcar_can_interrupt()
416 			__napi_schedule(&priv->napi);  in rcar_can_interrupt()
425 	struct rcar_can_priv *priv = netdev_priv(dev);  in rcar_can_set_bittiming()  local
426 	struct can_bittiming *bt = &priv->can.bittiming;  in rcar_can_set_bittiming()
436 	writel((bcr << 8) | priv->clock_select, &priv->regs->bcr);  in rcar_can_set_bittiming()
441 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_start()  local
451 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_start()
453 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
456 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
458 		if (readw(&priv->regs->str) & RCAR_CAN_STR_RSTST)  in rcar_can_start()
467 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_start()
470 	writel(0, &priv->regs->mkr_2_9[6]);  in rcar_can_start()
471 	writel(0, &priv->regs->mkr_2_9[7]);  in rcar_can_start()
473 	writel(0, &priv->regs->mkivlr1);  in rcar_can_start()
475 	writel(0, &priv->regs->fidcr[0]);  in rcar_can_start()
476 	writel(RCAR_CAN_FIDCR_IDE | RCAR_CAN_FIDCR_RTR, &priv->regs->fidcr[1]);  in rcar_can_start()
478 	writel(RCAR_CAN_MIER1_RXFIE | RCAR_CAN_MIER1_TXFIE, &priv->regs->mier1);  in rcar_can_start()
480 	priv->ier = RCAR_CAN_IER_ERSIE | RCAR_CAN_IER_RXFIE |  in rcar_can_start()
482 	writeb(priv->ier, &priv->regs->ier);  in rcar_can_start()
485 	writeb(RCAR_CAN_ECSR_EDPM, &priv->regs->ecsr);  in rcar_can_start()
488 	       (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING ?  in rcar_can_start()
490 	       RCAR_CAN_EIER_OLIE, &priv->regs->eier);  in rcar_can_start()
491 	priv->can.state = CAN_STATE_ERROR_ACTIVE;  in rcar_can_start()
494 	writew(ctlr & ~RCAR_CAN_CTLR_CANM, &priv->regs->ctlr);  in rcar_can_start()
496 		if (!(readw(&priv->regs->str) & RCAR_CAN_STR_RSTST))  in rcar_can_start()
500 	writeb(RCAR_CAN_RFCR_RFE, &priv->regs->rfcr);  in rcar_can_start()
501 	writeb(RCAR_CAN_TFCR_TFE, &priv->regs->tfcr);  in rcar_can_start()
506 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_open()  local
509 	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()
537 	napi_disable(&priv->napi);  in rcar_can_open()
540 	clk_disable_unprepare(priv->can_clk);  in rcar_can_open()
542 	clk_disable_unprepare(priv->clk);  in rcar_can_open()
549 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_stop()  local
554 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_stop()
556 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_stop()
558 		if (readw(&priv->regs->str) & RCAR_CAN_STR_RSTST)  in rcar_can_stop()
561 	writel(0, &priv->regs->mier0);  in rcar_can_stop()
562 	writel(0, &priv->regs->mier1);  in rcar_can_stop()
563 	writeb(0, &priv->regs->ier);  in rcar_can_stop()
564 	writeb(0, &priv->regs->eier);  in rcar_can_stop()
567 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_stop()
568 	priv->can.state = CAN_STATE_STOPPED;  in rcar_can_stop()
573 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_close()  local
578 	napi_disable(&priv->napi);  in rcar_can_close()
579 	clk_disable_unprepare(priv->can_clk);  in rcar_can_close()
580 	clk_disable_unprepare(priv->clk);  in rcar_can_close()
589 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_start_xmit()  local
606 			       &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].data[i]);  in rcar_can_start_xmit()
609 	writel(data, &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].id);  in rcar_can_start_xmit()
611 	writeb(cf->can_dlc, &priv->regs->mb[RCAR_CAN_TX_FIFO_MBX].dlc);  in rcar_can_start_xmit()
613 	priv->tx_dlc[priv->tx_head % RCAR_CAN_FIFO_DEPTH] = cf->can_dlc;  in rcar_can_start_xmit()
614 	can_put_echo_skb(skb, ndev, priv->tx_head % RCAR_CAN_FIFO_DEPTH);  in rcar_can_start_xmit()
615 	priv->tx_head++;  in rcar_can_start_xmit()
620 	writeb(0xff, &priv->regs->tfpcr);  in rcar_can_start_xmit()
622 	if (priv->tx_head - priv->tx_tail >= RCAR_CAN_FIFO_DEPTH)  in rcar_can_start_xmit()
635 static void rcar_can_rx_pkt(struct rcar_can_priv *priv)  in rcar_can_rx_pkt()  argument
637 	struct net_device_stats *stats = &priv->ndev->stats;  in rcar_can_rx_pkt()
643 	skb = alloc_can_skb(priv->ndev, &cf);  in rcar_can_rx_pkt()
649 	data = readl(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].id);  in rcar_can_rx_pkt()
655 	dlc = readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].dlc);  in rcar_can_rx_pkt()
662 			readb(&priv->regs->mb[RCAR_CAN_RX_FIFO_MBX].data[dlc]);  in rcar_can_rx_pkt()
665 	can_led_event(priv->ndev, CAN_LED_EVENT_RX);  in rcar_can_rx_pkt()
674 	struct rcar_can_priv *priv = container_of(napi,  in rcar_can_rx_poll()  local
681 		isr = readb(&priv->regs->isr);  in rcar_can_rx_poll()
684 			writeb(isr & ~RCAR_CAN_ISR_RXFF, &priv->regs->isr);  in rcar_can_rx_poll()
685 		rfcr = readb(&priv->regs->rfcr);  in rcar_can_rx_poll()
688 		rcar_can_rx_pkt(priv);  in rcar_can_rx_poll()
693 		writeb(0xff, &priv->regs->rfpcr);  in rcar_can_rx_poll()
698 		priv->ier |= RCAR_CAN_IER_RXFIE;  in rcar_can_rx_poll()
699 		writeb(priv->ier, &priv->regs->ier);  in rcar_can_rx_poll()
719 	struct rcar_can_priv *priv = netdev_priv(dev);  in rcar_can_get_berr_counter()  local
722 	err = clk_prepare_enable(priv->clk);  in rcar_can_get_berr_counter()
725 	bec->txerr = readb(&priv->regs->tecr);  in rcar_can_get_berr_counter()
726 	bec->rxerr = readb(&priv->regs->recr);  in rcar_can_get_berr_counter()
727 	clk_disable_unprepare(priv->clk);  in rcar_can_get_berr_counter()
740 	struct rcar_can_priv *priv;  in rcar_can_probe()  local
781 	priv = netdev_priv(ndev);  in rcar_can_probe()
783 	priv->clk = devm_clk_get(&pdev->dev, "clkp1");  in rcar_can_probe()
784 	if (IS_ERR(priv->clk)) {  in rcar_can_probe()
785 		err = PTR_ERR(priv->clk);  in rcar_can_probe()
795 	priv->can_clk = devm_clk_get(&pdev->dev, clock_names[clock_select]);  in rcar_can_probe()
796 	if (IS_ERR(priv->can_clk)) {  in rcar_can_probe()
797 		err = PTR_ERR(priv->can_clk);  in rcar_can_probe()
805 	priv->ndev = ndev;  in rcar_can_probe()
806 	priv->regs = addr;  in rcar_can_probe()
807 	priv->clock_select = clock_select;  in rcar_can_probe()
808 	priv->can.clock.freq = clk_get_rate(priv->can_clk);  in rcar_can_probe()
809 	priv->can.bittiming_const = &rcar_can_bittiming_const;  in rcar_can_probe()
810 	priv->can.do_set_mode = rcar_can_do_set_mode;  in rcar_can_probe()
811 	priv->can.do_get_berr_counter = rcar_can_get_berr_counter;  in rcar_can_probe()
812 	priv->can.ctrlmode_supported = CAN_CTRLMODE_BERR_REPORTING;  in rcar_can_probe()
816 	netif_napi_add(ndev, &priv->napi, rcar_can_rx_poll,  in rcar_can_probe()
828 		 priv->regs, ndev->irq);  in rcar_can_probe()
832 	netif_napi_del(&priv->napi);  in rcar_can_probe()
842 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_remove()  local
845 	netif_napi_del(&priv->napi);  in rcar_can_remove()
853 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_suspend()  local
860 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_suspend()
862 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_suspend()
864 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_suspend()
865 	priv->can.state = CAN_STATE_SLEEPING;  in rcar_can_suspend()
867 	clk_disable(priv->clk);  in rcar_can_suspend()
874 	struct rcar_can_priv *priv = netdev_priv(ndev);  in rcar_can_resume()  local
878 	err = clk_enable(priv->clk);  in rcar_can_resume()
884 	ctlr = readw(&priv->regs->ctlr);  in rcar_can_resume()
886 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_resume()
888 	writew(ctlr, &priv->regs->ctlr);  in rcar_can_resume()
889 	priv->can.state = CAN_STATE_ERROR_ACTIVE;  in rcar_can_resume()