can/sja1000/tscan1.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * tscan1.c: driver for Technologic Systems TS-CAN1 PC104 boards
9  * - Getting started with TS-CAN1, Technologic Systems, Feb 2022
10  *	https://docs.embeddedts.com/TS-CAN1
21 MODULE_DESCRIPTION("Driver for Technologic Systems TS-CAN1 PC104 boards");
41 /* PLD mode register SJA1000 IO enable bit */
68 	return inb((unsigned long)priv->reg_base + reg);  in tscan1_read()
74 	outb(val, (unsigned long)priv->reg_base + reg);  in tscan1_write()
77 /* Probe for a TS-CAN1 board with JP2:JP1 jumper setting ID */
87 		return -EBUSY;  in tscan1_probe()
92 		return -ENODEV;  in tscan1_probe()
108 		return -EINVAL;  in tscan1_probe()
114 		return -ENOMEM;  in tscan1_probe()
120 	netdev->base_addr = pld_base;  in tscan1_probe()
121 	netdev->irq = irq;  in tscan1_probe()
124 	priv->read_reg = tscan1_read;  in tscan1_probe()
125 	priv->write_reg = tscan1_write;  in tscan1_probe()
126 	priv->can.clock.freq = TSCAN1_SJA1000_XTAL / 2;  in tscan1_probe()
127 	priv->cdr = CDR_CBP | CDR_CLK_OFF;  in tscan1_probe()
128 	priv->ocr = OCR_TX0_PUSHPULL;  in tscan1_probe()
140 		priv->reg_base = (void __iomem *)sja1000_base;  in tscan1_probe()
144 			netdev_info(netdev, "TS-CAN1 at 0x%lx 0x%lx irq %d\n",  in tscan1_probe()
158 	return -ENXIO;  in tscan1_probe()
172 	pld_base = netdev->base_addr;  in tscan1_remove()
173 	sja1000_base = (unsigned long)priv->reg_base;  in tscan1_remove()