246 	struct spi_device *spi;  member
276 static inline int mcp251x_is_##_model(struct spi_device *spi) \
278 	struct mcp251x_priv *priv = spi_get_drvdata(spi); \
312 static int mcp251x_spi_trans(struct spi_device *spi, int len)  in mcp251x_spi_trans()  argument
314 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_spi_trans()
334 	ret = spi_sync(spi, &m);  in mcp251x_spi_trans()
336 		dev_err(&spi->dev, "spi transfer failed: ret = %d\n", ret);  in mcp251x_spi_trans()
340 static u8 mcp251x_read_reg(struct spi_device *spi, uint8_t reg)  in mcp251x_read_reg()  argument
342 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_read_reg()
348 	mcp251x_spi_trans(spi, 3);  in mcp251x_read_reg()
354 static void mcp251x_read_2regs(struct spi_device *spi, uint8_t reg,  in mcp251x_read_2regs()  argument
357 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_read_2regs()
362 	mcp251x_spi_trans(spi, 4);  in mcp251x_read_2regs()
368 static void mcp251x_write_reg(struct spi_device *spi, u8 reg, uint8_t val)  in mcp251x_write_reg()  argument
370 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_write_reg()
376 	mcp251x_spi_trans(spi, 3);  in mcp251x_write_reg()
379 static void mcp251x_write_bits(struct spi_device *spi, u8 reg,  in mcp251x_write_bits()  argument
382 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_write_bits()
389 	mcp251x_spi_trans(spi, 4);  in mcp251x_write_bits()
392 static void mcp251x_hw_tx_frame(struct spi_device *spi, u8 *buf,  in mcp251x_hw_tx_frame()  argument
395 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_tx_frame()
397 	if (mcp251x_is_2510(spi)) {  in mcp251x_hw_tx_frame()
401 			mcp251x_write_reg(spi, TXBCTRL(tx_buf_idx) + i,  in mcp251x_hw_tx_frame()
405 		mcp251x_spi_trans(spi, TXBDAT_OFF + len);  in mcp251x_hw_tx_frame()
409 static void mcp251x_hw_tx(struct spi_device *spi, struct can_frame *frame,  in mcp251x_hw_tx()  argument
412 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_tx()
433 	mcp251x_hw_tx_frame(spi, buf, frame->can_dlc, tx_buf_idx);  in mcp251x_hw_tx()
437 	mcp251x_spi_trans(priv->spi, 1);  in mcp251x_hw_tx()
440 static void mcp251x_hw_rx_frame(struct spi_device *spi, u8 *buf,  in mcp251x_hw_rx_frame()  argument
443 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_rx_frame()
445 	if (mcp251x_is_2510(spi)) {  in mcp251x_hw_rx_frame()
449 			buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i);  in mcp251x_hw_rx_frame()
453 			buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i);  in mcp251x_hw_rx_frame()
456 		mcp251x_spi_trans(spi, SPI_TRANSFER_BUF_LEN);  in mcp251x_hw_rx_frame()
461 static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx)  in mcp251x_hw_rx()  argument
463 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_rx()
470 		dev_err(&spi->dev, "cannot allocate RX skb\n");  in mcp251x_hw_rx()
475 	mcp251x_hw_rx_frame(spi, buf, buf_idx);  in mcp251x_hw_rx()
510 static void mcp251x_hw_sleep(struct spi_device *spi)  in mcp251x_hw_sleep()  argument
512 	mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_SLEEP);  in mcp251x_hw_sleep()
519 	struct spi_device *spi = priv->spi;  in mcp251x_hard_start_xmit()  local
522 		dev_warn(&spi->dev, "hard_xmit called while tx busy\n");  in mcp251x_hard_start_xmit()
557 static int mcp251x_set_normal_mode(struct spi_device *spi)  in mcp251x_set_normal_mode()  argument
559 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_set_normal_mode()
563 	mcp251x_write_reg(spi, CANINTE,  in mcp251x_set_normal_mode()
569 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LOOPBACK);  in mcp251x_set_normal_mode()
572 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LISTEN_ONLY);  in mcp251x_set_normal_mode()
575 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL);  in mcp251x_set_normal_mode()
579 		while (mcp251x_read_reg(spi, CANSTAT) & CANCTRL_REQOP_MASK) {  in mcp251x_set_normal_mode()
582 				dev_err(&spi->dev, "MCP251x didn't"  in mcp251x_set_normal_mode()
596 	struct spi_device *spi = priv->spi;  in mcp251x_do_set_bittiming()  local
598 	mcp251x_write_reg(spi, CNF1, ((bt->sjw - 1) << CNF1_SJW_SHIFT) |  in mcp251x_do_set_bittiming()
600 	mcp251x_write_reg(spi, CNF2, CNF2_BTLMODE |  in mcp251x_do_set_bittiming()
605 	mcp251x_write_bits(spi, CNF3, CNF3_PHSEG2_MASK,  in mcp251x_do_set_bittiming()
607 	dev_dbg(&spi->dev, "CNF: 0x%02x 0x%02x 0x%02x\n",  in mcp251x_do_set_bittiming()
608 		mcp251x_read_reg(spi, CNF1),  in mcp251x_do_set_bittiming()
609 		mcp251x_read_reg(spi, CNF2),  in mcp251x_do_set_bittiming()
610 		mcp251x_read_reg(spi, CNF3));  in mcp251x_do_set_bittiming()
616 			 struct spi_device *spi)  in mcp251x_setup()  argument
620 	mcp251x_write_reg(spi, RXBCTRL(0),  in mcp251x_setup()
622 	mcp251x_write_reg(spi, RXBCTRL(1),  in mcp251x_setup()
627 static int mcp251x_hw_reset(struct spi_device *spi)  in mcp251x_hw_reset()  argument
629 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_reset()
637 	ret = mcp251x_spi_trans(spi, 1);  in mcp251x_hw_reset()
644 	reg = mcp251x_read_reg(spi, CANSTAT);  in mcp251x_hw_reset()
651 static int mcp251x_hw_probe(struct spi_device *spi)  in mcp251x_hw_probe()  argument
656 	ret = mcp251x_hw_reset(spi);  in mcp251x_hw_probe()
660 	ctrl = mcp251x_read_reg(spi, CANCTRL);  in mcp251x_hw_probe()
662 	dev_dbg(&spi->dev, "CANCTRL 0x%02x\n", ctrl);  in mcp251x_hw_probe()
685 	struct spi_device *spi = priv->spi;  in mcp251x_open_clean()  local
687 	free_irq(spi->irq, priv);  in mcp251x_open_clean()
688 	mcp251x_hw_sleep(spi);  in mcp251x_open_clean()
696 	struct spi_device *spi = priv->spi;  in mcp251x_stop()  local
701 	free_irq(spi->irq, priv);  in mcp251x_stop()
708 	mcp251x_write_reg(spi, CANINTE, 0x00);  in mcp251x_stop()
709 	mcp251x_write_reg(spi, CANINTF, 0x00);  in mcp251x_stop()
711 	mcp251x_write_reg(spi, TXBCTRL(0), 0);  in mcp251x_stop()
714 	mcp251x_hw_sleep(spi);  in mcp251x_stop()
746 	struct spi_device *spi = priv->spi;  in mcp251x_tx_work_handler()  local
759 			mcp251x_hw_tx(spi, frame, 0);  in mcp251x_tx_work_handler()
772 	struct spi_device *spi = priv->spi;  in mcp251x_restart_work_handler()  local
777 		mcp251x_hw_reset(spi);  in mcp251x_restart_work_handler()
778 		mcp251x_setup(net, priv, spi);  in mcp251x_restart_work_handler()
780 			mcp251x_set_normal_mode(spi);  in mcp251x_restart_work_handler()
784 			mcp251x_set_normal_mode(spi);  in mcp251x_restart_work_handler()
787 			mcp251x_hw_sleep(spi);  in mcp251x_restart_work_handler()
795 		mcp251x_write_reg(spi, TXBCTRL(0), 0);  in mcp251x_restart_work_handler()
806 	struct spi_device *spi = priv->spi;  in mcp251x_can_ist()  local
816 		mcp251x_read_2regs(spi, CANINTF, &intf, &eflag);  in mcp251x_can_ist()
823 			mcp251x_hw_rx(spi, 0);  in mcp251x_can_ist()
828 			if (mcp251x_is_2510(spi))  in mcp251x_can_ist()
829 				mcp251x_write_bits(spi, CANINTF, CANINTF_RX0IF, 0x00);  in mcp251x_can_ist()
834 			mcp251x_hw_rx(spi, 1);  in mcp251x_can_ist()
836 			if (mcp251x_is_2510(spi))  in mcp251x_can_ist()
844 			mcp251x_write_bits(spi, CANINTF, clear_intf, 0x00);  in mcp251x_can_ist()
847 			mcp251x_write_bits(spi, EFLG, eflag, 0x00);  in mcp251x_can_ist()
911 				mcp251x_hw_sleep(spi);  in mcp251x_can_ist()
938 	struct spi_device *spi = priv->spi;  in mcp251x_open()  local
944 		dev_err(&spi->dev, "unable to set initial baudrate!\n");  in mcp251x_open()
955 	ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,  in mcp251x_open()
958 		dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);  in mcp251x_open()
968 	ret = mcp251x_hw_reset(spi);  in mcp251x_open()
973 	ret = mcp251x_setup(net, priv, spi);  in mcp251x_open()
978 	ret = mcp251x_set_normal_mode(spi);  in mcp251x_open()
1024 MODULE_DEVICE_TABLE(spi, mcp251x_id_table);
1026 static int mcp251x_can_probe(struct spi_device *spi)  in mcp251x_can_probe()  argument
1029 							   &spi->dev);  in mcp251x_can_probe()
1030 	struct mcp251x_platform_data *pdata = dev_get_platdata(&spi->dev);  in mcp251x_can_probe()
1036 	clk = devm_clk_get(&spi->dev, NULL);  in mcp251x_can_probe()
1073 		priv->model = spi_get_device_id(spi)->driver_data;  in mcp251x_can_probe()
1077 	spi_set_drvdata(spi, priv);  in mcp251x_can_probe()
1080 	spi->bits_per_word = 8;  in mcp251x_can_probe()
1081 	if (mcp251x_is_2510(spi))  in mcp251x_can_probe()
1082 		spi->max_speed_hz = spi->max_speed_hz ? : 5 * 1000 * 1000;  in mcp251x_can_probe()
1084 		spi->max_speed_hz = spi->max_speed_hz ? : 10 * 1000 * 1000;  in mcp251x_can_probe()
1085 	ret = spi_setup(spi);  in mcp251x_can_probe()
1089 	priv->power = devm_regulator_get_optional(&spi->dev, "vdd");  in mcp251x_can_probe()
1090 	priv->transceiver = devm_regulator_get_optional(&spi->dev, "xceiver");  in mcp251x_can_probe()
1101 	priv->spi = spi;  in mcp251x_can_probe()
1106 		spi->dev.coherent_dma_mask = ~0;  in mcp251x_can_probe()
1112 		priv->spi_tx_buf = dmam_alloc_coherent(&spi->dev,  in mcp251x_can_probe()
1129 		priv->spi_tx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,  in mcp251x_can_probe()
1135 		priv->spi_rx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,  in mcp251x_can_probe()
1143 	SET_NETDEV_DEV(net, &spi->dev);  in mcp251x_can_probe()
1146 	ret = mcp251x_hw_probe(spi);  in mcp251x_can_probe()
1150 	mcp251x_hw_sleep(spi);  in mcp251x_can_probe()
1173 static int mcp251x_can_remove(struct spi_device *spi)  in mcp251x_can_remove()  argument
1175 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_remove()
1192 	struct spi_device *spi = to_spi_device(dev);  in mcp251x_can_suspend()  local
1193 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_suspend()
1197 	disable_irq(spi->irq);  in mcp251x_can_suspend()
1205 		mcp251x_hw_sleep(spi);  in mcp251x_can_suspend()
1222 	struct spi_device *spi = to_spi_device(dev);  in mcp251x_can_resume()  local
1223 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_resume()
1236 	enable_irq(spi->irq);  in mcp251x_can_resume()