245 	struct spi_device *spi;  member
275 static inline int mcp251x_is_##_model(struct spi_device *spi) \
277 	struct mcp251x_priv *priv = spi_get_drvdata(spi); \
311 static int mcp251x_spi_trans(struct spi_device *spi, int len)  in mcp251x_spi_trans()  argument
313 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_spi_trans()
333 	ret = spi_sync(spi, &m);  in mcp251x_spi_trans()
335 		dev_err(&spi->dev, "spi transfer failed: ret = %d\n", ret);  in mcp251x_spi_trans()
339 static u8 mcp251x_read_reg(struct spi_device *spi, uint8_t reg)  in mcp251x_read_reg()  argument
341 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_read_reg()
347 	mcp251x_spi_trans(spi, 3);  in mcp251x_read_reg()
353 static void mcp251x_read_2regs(struct spi_device *spi, uint8_t reg,  in mcp251x_read_2regs()  argument
356 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_read_2regs()
361 	mcp251x_spi_trans(spi, 4);  in mcp251x_read_2regs()
367 static void mcp251x_write_reg(struct spi_device *spi, u8 reg, uint8_t val)  in mcp251x_write_reg()  argument
369 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_write_reg()
375 	mcp251x_spi_trans(spi, 3);  in mcp251x_write_reg()
378 static void mcp251x_write_bits(struct spi_device *spi, u8 reg,  in mcp251x_write_bits()  argument
381 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_write_bits()
388 	mcp251x_spi_trans(spi, 4);  in mcp251x_write_bits()
391 static void mcp251x_hw_tx_frame(struct spi_device *spi, u8 *buf,  in mcp251x_hw_tx_frame()  argument
394 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_tx_frame()
396 	if (mcp251x_is_2510(spi)) {  in mcp251x_hw_tx_frame()
400 			mcp251x_write_reg(spi, TXBCTRL(tx_buf_idx) + i,  in mcp251x_hw_tx_frame()
404 		mcp251x_spi_trans(spi, TXBDAT_OFF + len);  in mcp251x_hw_tx_frame()
408 static void mcp251x_hw_tx(struct spi_device *spi, struct can_frame *frame,  in mcp251x_hw_tx()  argument
411 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_tx()
432 	mcp251x_hw_tx_frame(spi, buf, frame->can_dlc, tx_buf_idx);  in mcp251x_hw_tx()
436 	mcp251x_spi_trans(priv->spi, 1);  in mcp251x_hw_tx()
439 static void mcp251x_hw_rx_frame(struct spi_device *spi, u8 *buf,  in mcp251x_hw_rx_frame()  argument
442 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_rx_frame()
444 	if (mcp251x_is_2510(spi)) {  in mcp251x_hw_rx_frame()
448 			buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i);  in mcp251x_hw_rx_frame()
452 			buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i);  in mcp251x_hw_rx_frame()
455 		mcp251x_spi_trans(spi, SPI_TRANSFER_BUF_LEN);  in mcp251x_hw_rx_frame()
460 static void mcp251x_hw_rx(struct spi_device *spi, int buf_idx)  in mcp251x_hw_rx()  argument
462 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_rx()
469 		dev_err(&spi->dev, "cannot allocate RX skb\n");  in mcp251x_hw_rx()
474 	mcp251x_hw_rx_frame(spi, buf, buf_idx);  in mcp251x_hw_rx()
509 static void mcp251x_hw_sleep(struct spi_device *spi)  in mcp251x_hw_sleep()  argument
511 	mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_SLEEP);  in mcp251x_hw_sleep()
518 	struct spi_device *spi = priv->spi;  in mcp251x_hard_start_xmit()  local
521 		dev_warn(&spi->dev, "hard_xmit called while tx busy\n");  in mcp251x_hard_start_xmit()
556 static int mcp251x_set_normal_mode(struct spi_device *spi)  in mcp251x_set_normal_mode()  argument
558 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_set_normal_mode()
562 	mcp251x_write_reg(spi, CANINTE,  in mcp251x_set_normal_mode()
568 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LOOPBACK);  in mcp251x_set_normal_mode()
571 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LISTEN_ONLY);  in mcp251x_set_normal_mode()
574 		mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL);  in mcp251x_set_normal_mode()
578 		while (mcp251x_read_reg(spi, CANSTAT) & CANCTRL_REQOP_MASK) {  in mcp251x_set_normal_mode()
581 				dev_err(&spi->dev, "MCP251x didn't"  in mcp251x_set_normal_mode()
595 	struct spi_device *spi = priv->spi;  in mcp251x_do_set_bittiming()  local
597 	mcp251x_write_reg(spi, CNF1, ((bt->sjw - 1) << CNF1_SJW_SHIFT) |  in mcp251x_do_set_bittiming()
599 	mcp251x_write_reg(spi, CNF2, CNF2_BTLMODE |  in mcp251x_do_set_bittiming()
604 	mcp251x_write_bits(spi, CNF3, CNF3_PHSEG2_MASK,  in mcp251x_do_set_bittiming()
606 	dev_dbg(&spi->dev, "CNF: 0x%02x 0x%02x 0x%02x\n",  in mcp251x_do_set_bittiming()
607 		mcp251x_read_reg(spi, CNF1),  in mcp251x_do_set_bittiming()
608 		mcp251x_read_reg(spi, CNF2),  in mcp251x_do_set_bittiming()
609 		mcp251x_read_reg(spi, CNF3));  in mcp251x_do_set_bittiming()
615 			 struct spi_device *spi)  in mcp251x_setup()  argument
619 	mcp251x_write_reg(spi, RXBCTRL(0),  in mcp251x_setup()
621 	mcp251x_write_reg(spi, RXBCTRL(1),  in mcp251x_setup()
626 static int mcp251x_hw_reset(struct spi_device *spi)  in mcp251x_hw_reset()  argument
628 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_hw_reset()
636 	ret = mcp251x_spi_trans(spi, 1);  in mcp251x_hw_reset()
643 	reg = mcp251x_read_reg(spi, CANSTAT);  in mcp251x_hw_reset()
650 static int mcp251x_hw_probe(struct spi_device *spi)  in mcp251x_hw_probe()  argument
655 	ret = mcp251x_hw_reset(spi);  in mcp251x_hw_probe()
659 	ctrl = mcp251x_read_reg(spi, CANCTRL);  in mcp251x_hw_probe()
661 	dev_dbg(&spi->dev, "CANCTRL 0x%02x\n", ctrl);  in mcp251x_hw_probe()
684 	struct spi_device *spi = priv->spi;  in mcp251x_open_clean()  local
686 	free_irq(spi->irq, priv);  in mcp251x_open_clean()
687 	mcp251x_hw_sleep(spi);  in mcp251x_open_clean()
695 	struct spi_device *spi = priv->spi;  in mcp251x_stop()  local
700 	free_irq(spi->irq, priv);  in mcp251x_stop()
707 	mcp251x_write_reg(spi, CANINTE, 0x00);  in mcp251x_stop()
708 	mcp251x_write_reg(spi, CANINTF, 0x00);  in mcp251x_stop()
710 	mcp251x_write_reg(spi, TXBCTRL(0), 0);  in mcp251x_stop()
713 	mcp251x_hw_sleep(spi);  in mcp251x_stop()
745 	struct spi_device *spi = priv->spi;  in mcp251x_tx_work_handler()  local
758 			mcp251x_hw_tx(spi, frame, 0);  in mcp251x_tx_work_handler()
771 	struct spi_device *spi = priv->spi;  in mcp251x_restart_work_handler()  local
776 		mcp251x_hw_reset(spi);  in mcp251x_restart_work_handler()
777 		mcp251x_setup(net, priv, spi);  in mcp251x_restart_work_handler()
779 			mcp251x_set_normal_mode(spi);  in mcp251x_restart_work_handler()
783 			mcp251x_set_normal_mode(spi);  in mcp251x_restart_work_handler()
786 			mcp251x_hw_sleep(spi);  in mcp251x_restart_work_handler()
794 		mcp251x_write_reg(spi, TXBCTRL(0), 0);  in mcp251x_restart_work_handler()
805 	struct spi_device *spi = priv->spi;  in mcp251x_can_ist()  local
815 		mcp251x_read_2regs(spi, CANINTF, &intf, &eflag);  in mcp251x_can_ist()
822 			mcp251x_hw_rx(spi, 0);  in mcp251x_can_ist()
827 			if (mcp251x_is_2510(spi))  in mcp251x_can_ist()
828 				mcp251x_write_bits(spi, CANINTF, CANINTF_RX0IF, 0x00);  in mcp251x_can_ist()
833 			mcp251x_hw_rx(spi, 1);  in mcp251x_can_ist()
835 			if (mcp251x_is_2510(spi))  in mcp251x_can_ist()
843 			mcp251x_write_bits(spi, CANINTF, clear_intf, 0x00);  in mcp251x_can_ist()
846 			mcp251x_write_bits(spi, EFLG, eflag, 0x00);  in mcp251x_can_ist()
910 				mcp251x_hw_sleep(spi);  in mcp251x_can_ist()
937 	struct spi_device *spi = priv->spi;  in mcp251x_open()  local
943 		dev_err(&spi->dev, "unable to set initial baudrate!\n");  in mcp251x_open()
954 	ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,  in mcp251x_open()
957 		dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);  in mcp251x_open()
967 	ret = mcp251x_hw_reset(spi);  in mcp251x_open()
972 	ret = mcp251x_setup(net, priv, spi);  in mcp251x_open()
977 	ret = mcp251x_set_normal_mode(spi);  in mcp251x_open()
1023 MODULE_DEVICE_TABLE(spi, mcp251x_id_table);
1025 static int mcp251x_can_probe(struct spi_device *spi)  in mcp251x_can_probe()  argument
1028 							   &spi->dev);  in mcp251x_can_probe()
1029 	struct mcp251x_platform_data *pdata = dev_get_platdata(&spi->dev);  in mcp251x_can_probe()
1035 	clk = devm_clk_get(&spi->dev, NULL);  in mcp251x_can_probe()
1072 		priv->model = spi_get_device_id(spi)->driver_data;  in mcp251x_can_probe()
1076 	spi_set_drvdata(spi, priv);  in mcp251x_can_probe()
1079 	spi->bits_per_word = 8;  in mcp251x_can_probe()
1080 	if (mcp251x_is_2510(spi))  in mcp251x_can_probe()
1081 		spi->max_speed_hz = spi->max_speed_hz ? : 5 * 1000 * 1000;  in mcp251x_can_probe()
1083 		spi->max_speed_hz = spi->max_speed_hz ? : 10 * 1000 * 1000;  in mcp251x_can_probe()
1084 	ret = spi_setup(spi);  in mcp251x_can_probe()
1088 	priv->power = devm_regulator_get(&spi->dev, "vdd");  in mcp251x_can_probe()
1089 	priv->transceiver = devm_regulator_get(&spi->dev, "xceiver");  in mcp251x_can_probe()
1100 	priv->spi = spi;  in mcp251x_can_probe()
1105 		spi->dev.coherent_dma_mask = ~0;  in mcp251x_can_probe()
1111 		priv->spi_tx_buf = dmam_alloc_coherent(&spi->dev,  in mcp251x_can_probe()
1128 		priv->spi_tx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,  in mcp251x_can_probe()
1134 		priv->spi_rx_buf = devm_kzalloc(&spi->dev, SPI_TRANSFER_BUF_LEN,  in mcp251x_can_probe()
1142 	SET_NETDEV_DEV(net, &spi->dev);  in mcp251x_can_probe()
1145 	ret = mcp251x_hw_probe(spi);  in mcp251x_can_probe()
1149 	mcp251x_hw_sleep(spi);  in mcp251x_can_probe()
1172 static int mcp251x_can_remove(struct spi_device *spi)  in mcp251x_can_remove()  argument
1174 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_remove()
1191 	struct spi_device *spi = to_spi_device(dev);  in mcp251x_can_suspend()  local
1192 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_suspend()
1196 	disable_irq(spi->irq);  in mcp251x_can_suspend()
1204 		mcp251x_hw_sleep(spi);  in mcp251x_can_suspend()
1221 	struct spi_device *spi = to_spi_device(dev);  in mcp251x_can_resume()  local
1222 	struct mcp251x_priv *priv = spi_get_drvdata(spi);  in mcp251x_can_resume()
1235 	enable_irq(spi->irq);  in mcp251x_can_resume()