1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2008-2010 Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>
7  *	Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
8  *	Copyright (C) 2008 Sebastian Haas <haas@ems-wuensche.com>
17 #include <linux/pci.h>
26 MODULE_DESCRIPTION("Socket-CAN driver for PLX90xx PCI-bridge cards with "
28 MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "
29 			"Adlink PCI-7841/cPCI-7841 SE, "
30 			"Marathon CAN-bus-PCI, "
31 			"Marathon CAN-bus-PCIe, "
33 			"esd CAN-PCI/CPCI/PCI104/200, "
34 			"esd CAN-PCI/PMC/266, "
35 			"esd CAN-PCIe/2000, "
36 			"Connect Tech Inc. CANpro/104-Plus Opto (CRG001), "
37 			"IXXAT PC-I 04/PCI, "
38 			"ELCUS CAN-200-PCI, "
39 			"ASEM DUAL CAN-RAW")
49 	/* Pointer to device-dependent reset function */
66 #define PLX_PCI_INT_EN	(1 << 6)	/* PCI Interrupt Enable */
67 #define PLX_PCI_RESET	(1 << 30)	/* PCI Adapter Software Reset */
83  * This means normal output mode, push-pull and the correct polarity.
161 	u32 size;		/* 0x00 - auto, e.g. length of entire bar */
177 	/* Pointer to device-dependent reset function */
182 	"Adlink PCI-7841/cPCI-7841", 2,
186 	/* based on PLX9052 */
190 	"Adlink PCI-7841/cPCI-7841 SE", 2,
194 	/* based on PLX9052 */
198 	"esd CAN-PCI/CPCI/PCI104/200", 2,
202 	/* based on PLX9030/9050 */
206 	"esd CAN-PCI/PMC/266", 2,
210 	/* based on PLX9056 */
214 	"esd CAN-PCIe/2000", 2,
218 	/* based on PEX8311 */
222 	"IXXAT PC-I 04/PCI", 2,
226 	/* based on PLX9050 */
230 	"Marathon CAN-bus-PCI", 2,
234 	/* based on PLX9052 */
238 	"Marathon CAN-bus-PCIe", 2,
242 	/* based on PEX8311 */
250 	/* based on PLX9030 */
254 	"Connect Tech Inc. CANpro/104-Plus Opto (CRG001)", 2,
258 	/* based on PLX9030 */
262 	"Eclus CAN-200-PCI", 2,
266 	/* based on PLX9030 */
274 	 /* based on PLX9052 */
278 	"ASEM Dual CAN raw PCI", 2,
282 	/* based on PLX9030 */
287 		/* Adlink PCI-7841/cPCI-7841 */
294 		/* Adlink PCI-7841/cPCI-7841 SE */
301 		/* esd CAN-PCI/200 */
308 		/* esd CAN-CPCI/200 */
315 		/* esd CAN-PCI104/200 */
322 		/* esd CAN-PCI/266 */
329 		/* esd CAN-PMC/266 */
336 		/* esd CAN-PCIE/2000 */
343 		/* IXXAT PC-I 04/PCI card */
350 		/* Marathon CAN-bus-PCI card */
357 		/* Marathon CAN-bus-PCIe card */
371 		/* Connect Tech Inc. CANpro/104-Plus Opto (CRG001) card */
378 		/* Elcus CAN-200-PCI */
399 		/* ASEM Dual CAN raw -new model */
407 MODULE_DEVICE_TABLE(pci, plx_pci_tbl);
411 	return ioread8(priv->reg_base + port);  in plx_pci_read_reg()
416 	iowrite8(val, priv->reg_base + port);  in plx_pci_write_reg()
432 	if ((priv->read_reg(priv, REG_CR) & REG_CR_BASICCAN_INITIAL_MASK) ==  in plx_pci_check_sja1000()
434 	    (priv->read_reg(priv, SJA1000_SR) == REG_SR_BASICCAN_INITIAL) &&  in plx_pci_check_sja1000()
435 	    (priv->read_reg(priv, SJA1000_IR) == REG_IR_BASICCAN_INITIAL))  in plx_pci_check_sja1000()
439 	priv->write_reg(priv, SJA1000_CDR, CDR_PELICAN);  in plx_pci_check_sja1000()
445 	if (priv->read_reg(priv, SJA1000_MOD) == REG_MOD_PELICAN_INITIAL &&  in plx_pci_check_sja1000()
446 	    priv->read_reg(priv, SJA1000_SR) == REG_SR_PELICAN_INITIAL &&  in plx_pci_check_sja1000()
447 	    priv->read_reg(priv, SJA1000_IR) == REG_IR_PELICAN_INITIAL)  in plx_pci_check_sja1000()
463 	cntrl = ioread32(card->conf_addr + PLX_CNTRL);  in plx_pci_reset_common()
465 	iowrite32(cntrl, card->conf_addr + PLX_CNTRL);  in plx_pci_reset_common()
468 	iowrite32(cntrl, card->conf_addr + PLX_CNTRL);  in plx_pci_reset_common()
481 	cntrl = ioread32(card->conf_addr + PLX9056_CNTRL);  in plx9056_pci_reset_common()
483 	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);  in plx9056_pci_reset_common()
486 	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);  in plx9056_pci_reset_common()
490 	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);  in plx9056_pci_reset_common()
500 	iowrite32(cntrl, card->conf_addr + PLX9056_CNTRL);  in plx9056_pci_reset_common()
503 /* Special reset function for Marathon CAN-bus-PCI card */
515 			dev_err(&pdev->dev, "Failed to remap reset "  in plx_pci_reset_marathon_pci()
526 /* Special reset function for Marathon CAN-bus-PCIe card */
538 		addr = pci_iomap(pdev, chan_map->bar, chan_map->size);  in plx_pci_reset_marathon_pcie()
540 			dev_err(&pdev->dev, "Failed to remap reset "  in plx_pci_reset_marathon_pcie()
541 				"space %d (BAR%d)\n", i, chan_map->bar);  in plx_pci_reset_marathon_pcie()
545 			reset_addr = addr + chan_map->offset +  in plx_pci_reset_marathon_pcie()
564 		dev_err(&pdev->dev, "Failed to remap reset space 0 (BAR0)\n");  in plx_pci_reset_asem_dual_can_raw()
587 		dev = card->net_dev[i];  in plx_pci_del_card()
591 		dev_info(&pdev->dev, "Removing %s\n", dev->name);  in plx_pci_del_card()
594 		if (priv->reg_base)  in plx_pci_del_card()
595 			pci_iounmap(pdev, priv->reg_base);  in plx_pci_del_card()
599 	card->reset_func(pdev);  in plx_pci_del_card()
602 	 * Disable interrupts from PCI-card and disable local  in plx_pci_del_card()
605 	if (pdev->device != PCI_DEVICE_ID_PLX_9056 &&  in plx_pci_del_card()
606 	    pdev->device != MARATHON_PCIE_DEVICE_ID)  in plx_pci_del_card()
607 		iowrite32(0x0, card->conf_addr + PLX_INTCSR);  in plx_pci_del_card()
609 		iowrite32(0x0, card->conf_addr + PLX9056_INTCSR);  in plx_pci_del_card()
611 	if (card->conf_addr)  in plx_pci_del_card()
612 		pci_iounmap(pdev, card->conf_addr);  in plx_pci_del_card()
620  * Probe PLX90xx based device for the SJA1000 chips and register each
621  * available CAN channel to SJA1000 Socket-CAN subsystem.
634 	ci = (struct plx_pci_card_info *)ent->driver_data;  in plx_pci_add_card()
637 		dev_err(&pdev->dev, "Failed to enable PCI device\n");  in plx_pci_add_card()
638 		return -ENODEV;  in plx_pci_add_card()
641 	dev_info(&pdev->dev, "Detected \"%s\" card at slot #%i\n",  in plx_pci_add_card()
642 		 ci->name, PCI_SLOT(pdev->devfn));  in plx_pci_add_card()
648 		return -ENOMEM;  in plx_pci_add_card()
653 	card->channels = 0;  in plx_pci_add_card()
656 	addr = pci_iomap(pdev, ci->conf_map.bar, ci->conf_map.size);  in plx_pci_add_card()
658 		err = -ENOMEM;  in plx_pci_add_card()
659 		dev_err(&pdev->dev, "Failed to remap configuration space "  in plx_pci_add_card()
660 			"(BAR%d)\n", ci->conf_map.bar);  in plx_pci_add_card()
663 	card->conf_addr = addr + ci->conf_map.offset;  in plx_pci_add_card()
665 	ci->reset_func(pdev);  in plx_pci_add_card()
666 	card->reset_func = ci->reset_func;  in plx_pci_add_card()
669 	for (i = 0; i < ci->channel_count; i++) {  in plx_pci_add_card()
670 		struct plx_pci_channel_map *cm = &ci->chan_map_tbl[i];  in plx_pci_add_card()
674 			err = -ENOMEM;  in plx_pci_add_card()
678 		card->net_dev[i] = dev;  in plx_pci_add_card()
680 		priv->priv = card;  in plx_pci_add_card()
681 		priv->irq_flags = IRQF_SHARED;  in plx_pci_add_card()
683 		dev->irq = pdev->irq;  in plx_pci_add_card()
687 		 * This is device-dependent mapping  in plx_pci_add_card()
689 		addr = pci_iomap(pdev, cm->bar, cm->size);  in plx_pci_add_card()
691 			err = -ENOMEM;  in plx_pci_add_card()
692 			dev_err(&pdev->dev, "Failed to remap BAR%d\n", cm->bar);  in plx_pci_add_card()
696 		priv->reg_base = addr + cm->offset;  in plx_pci_add_card()
697 		priv->read_reg = plx_pci_read_reg;  in plx_pci_add_card()
698 		priv->write_reg = plx_pci_write_reg;  in plx_pci_add_card()
702 			priv->can.clock.freq = ci->can_clock;  in plx_pci_add_card()
703 			priv->ocr = ci->ocr;  in plx_pci_add_card()
704 			priv->cdr = ci->cdr;  in plx_pci_add_card()
706 			SET_NETDEV_DEV(dev, &pdev->dev);  in plx_pci_add_card()
707 			dev->dev_id = i;  in plx_pci_add_card()
712 				dev_err(&pdev->dev, "Registering device failed "  in plx_pci_add_card()
717 			card->channels++;  in plx_pci_add_card()
719 			dev_info(&pdev->dev, "Channel #%d at 0x%p, irq %d "  in plx_pci_add_card()
720 				 "registered as %s\n", i + 1, priv->reg_base,  in plx_pci_add_card()
721 				 dev->irq, dev->name);  in plx_pci_add_card()
723 			dev_err(&pdev->dev, "Channel #%d not detected\n",  in plx_pci_add_card()
726 			card->net_dev[i] = NULL;  in plx_pci_add_card()
730 	if (!card->channels) {  in plx_pci_add_card()
731 		err = -ENODEV;  in plx_pci_add_card()
736 	 * Enable interrupts from PCI-card (PLX90xx) and enable Local_1,  in plx_pci_add_card()
739 	if (pdev->device != PCI_DEVICE_ID_PLX_9056 &&  in plx_pci_add_card()
740 	    pdev->device != MARATHON_PCIE_DEVICE_ID) {  in plx_pci_add_card()
741 		val = ioread32(card->conf_addr + PLX_INTCSR);  in plx_pci_add_card()
742 		if (pdev->subsystem_vendor == PCI_VENDOR_ID_ESDGMBH)  in plx_pci_add_card()
746 		iowrite32(val, card->conf_addr + PLX_INTCSR);  in plx_pci_add_card()
749 			  card->conf_addr + PLX9056_INTCSR);  in plx_pci_add_card()
754 	dev_err(&pdev->dev, "Error: %d. Cleaning Up.\n", err);  in plx_pci_add_card()