1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright (C) 2012 Stephane Grosjean <s.grosjean@peak-system.com>
8  * Copyright (C) 2001-2006  PEAK System-Technik GmbH
19 #include <linux/i2c-algo-bit.h>
25 MODULE_AUTHOR("Stephane Grosjean <s.grosjean@peak-system.com>");
26 MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI family cards");
62 #define PEAK_PC_104P_DEVICE_ID	0x0006	/* PCAN-PC/104+ cards */
63 #define PEAK_PCI_104E_DEVICE_ID	0x0007	/* PCAN-PCI/104 Express cards */
65 #define PEAK_PCIE_OEM_ID	0x0009	/* PCAN-PCI Express OEM */
66 #define PEAK_PCIEC34_DEVICE_ID	0x000A	/* PCAN-PCI Express 34 (one channel) */
77 		.driver_data = (kernel_ulong_t)"PCAN-PCI",
80 		.driver_data = (kernel_ulong_t)"PCAN-PCI Express",
83 		.driver_data = (kernel_ulong_t)"PCAN-miniPCI",
86 		.driver_data = (kernel_ulong_t)"PCAN-miniPCIe",
89 		.driver_data = (kernel_ulong_t)"PCAN-PC/104-Plus Quad",
92 		.driver_data = (kernel_ulong_t)"PCAN-PCI/104-Express",
95 		.driver_data = (kernel_ulong_t)"PCAN-cPCI",
98 		.driver_data = (kernel_ulong_t)"PCAN-Chip PCIe",
103 		.driver_data = (kernel_ulong_t)"PCAN-ExpressCard",
106 		.driver_data = (kernel_ulong_t)"PCAN-ExpressCard 34",
115 /* PCAN-ExpressCard needs I2C bit-banging configuration option. */
180 	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SCL;  in pita_set_scl_highz()
182 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);  in pita_set_scl_highz()
187 	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SDA;  in pita_set_sda_highz()
189 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);  in pita_set_sda_highz()
194 	/* raise SCL & SDA GPIOs to high-Z */  in peak_pciec_init_pita_gpio()
205 	gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SDA;  in pita_setsda()
206 	writeb(gp_out, card->cfg_base + PITA_GPOUT);  in pita_setsda()
209 	gp_outen = readb(card->cfg_base + PITA_GPOEN);  in pita_setsda()
215 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);  in pita_setsda()
224 	gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SCL;  in pita_setscl()
225 	writeb(gp_out, card->cfg_base + PITA_GPOUT);  in pita_setscl()
228 	gp_outen = readb(card->cfg_base + PITA_GPOEN);  in pita_setscl()
234 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);  in pita_setscl()
244 	return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SDA) ? 1 : 0;  in pita_getsda()
254 	return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SCL) ? 1 : 0;  in pita_getscl()
257 /* write commands to the LED chip though the I2C-bus of the PCAN-PCIeC */
273 	if (offset == 5 && data == card->led_cache)  in peak_pciec_write_pca9553()
276 	ret = i2c_transfer(&card->led_chip, &msg, 1);  in peak_pciec_write_pca9553()
281 		card->led_cache = data;  in peak_pciec_write_pca9553()
292 	u8 new_led = card->led_cache;  in peak_pciec_led_work()
296 	for (i = 0; i < card->chan_count; i++) {  in peak_pciec_led_work()
301 		netdev = card->channel[i].netdev;  in peak_pciec_led_work()
302 		if (!netdev || !(netdev->flags & IFF_UP))  in peak_pciec_led_work()
312 		if (netdev->stats.rx_bytes != card->channel[i].prev_rx_bytes) {  in peak_pciec_led_work()
313 			card->channel[i].prev_rx_bytes = netdev->stats.rx_bytes;  in peak_pciec_led_work()
317 		if (netdev->stats.tx_bytes != card->channel[i].prev_tx_bytes) {  in peak_pciec_led_work()
318 			card->channel[i].prev_tx_bytes = netdev->stats.tx_bytes;  in peak_pciec_led_work()
329 		schedule_delayed_work(&card->led_work, HZ);  in peak_pciec_led_work()
335 	u8 new_led = card->led_cache;  in peak_pciec_set_leds()
339 	for (i = 0; i < card->chan_count; i++)  in peak_pciec_set_leds()
352 	schedule_delayed_work(&card->led_work, HZ);  in peak_pciec_start_led_work()
358 	cancel_delayed_work_sync(&card->led_work);  in peak_pciec_stop_led_work()
361 /* initialize the PCA9553 4-bit I2C-bus LED chip */
403 	struct peak_pci_chan *chan = priv->priv;  in peak_pciec_write_reg()
404 	struct peak_pciec_card *card = chan->pciec_card;  in peak_pciec_write_reg()
405 	int c = (priv->reg_base - card->reg_base) / PEAK_PCI_CHAN_SIZE;  in peak_pciec_write_reg()
439 	struct peak_pci_chan *chan = priv->priv;  in peak_pciec_probe()
444 	if (chan->prev_dev) {  in peak_pciec_probe()
445 		struct sja1000_priv *prev_priv = netdev_priv(chan->prev_dev);  in peak_pciec_probe()
446 		struct peak_pci_chan *prev_chan = prev_priv->priv;  in peak_pciec_probe()
448 		card = prev_chan->pciec_card;  in peak_pciec_probe()
450 			return -ENODEV;  in peak_pciec_probe()
457 			return -ENOMEM;  in peak_pciec_probe()
459 		card->cfg_base = chan->cfg_base;  in peak_pciec_probe()
460 		card->reg_base = priv->reg_base;  in peak_pciec_probe()
462 		card->led_chip.owner = THIS_MODULE;  in peak_pciec_probe()
463 		card->led_chip.dev.parent = &pdev->dev;  in peak_pciec_probe()
464 		card->led_chip.algo_data = &card->i2c_bit;  in peak_pciec_probe()
465 		strscpy(card->led_chip.name, "peak_i2c",  in peak_pciec_probe()
466 			sizeof(card->led_chip.name));  in peak_pciec_probe()
468 		card->i2c_bit = peak_pciec_i2c_bit_ops;  in peak_pciec_probe()
469 		card->i2c_bit.udelay = 10;  in peak_pciec_probe()
470 		card->i2c_bit.timeout = HZ;  in peak_pciec_probe()
471 		card->i2c_bit.data = card;  in peak_pciec_probe()
475 		err = i2c_bit_add_bus(&card->led_chip);  in peak_pciec_probe()
477 			dev_err(&pdev->dev, "i2c init failed\n");  in peak_pciec_probe()
483 			dev_err(&pdev->dev, "leds hardware init failed\n");  in peak_pciec_probe()
487 		INIT_DELAYED_WORK(&card->led_work, peak_pciec_led_work);  in peak_pciec_probe()
488 		/* PCAN-ExpressCard needs its own callback for leds */  in peak_pciec_probe()
489 		priv->write_reg = peak_pciec_write_reg;  in peak_pciec_probe()
492 	chan->pciec_card = card;  in peak_pciec_probe()
493 	card->channel[card->chan_count++].netdev = dev;  in peak_pciec_probe()
498 	i2c_del_adapter(&card->led_chip);  in peak_pciec_probe()
511 	i2c_del_adapter(&card->led_chip);  in peak_pciec_remove()
518 /* Placebo functions when PCAN-ExpressCard support is not selected */
521 	return -ENODEV;  in peak_pciec_probe()
531 	return readb(priv->reg_base + (port << 2));  in peak_pci_read_reg()
537 	writeb(val, priv->reg_base + (port << 2));  in peak_pci_write_reg()
542 	struct peak_pci_chan *chan = priv->priv;  in peak_pci_post_irq()
546 	icr = readw(chan->cfg_base + PITA_ICR);  in peak_pci_post_irq()
547 	if (icr & chan->icr_mask)  in peak_pci_post_irq()
548 		writew(chan->icr_mask, chan->cfg_base + PITA_ICR);  in peak_pci_post_irq()
551 static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)  in peak_pci_probe()  argument
573 	dev_dbg(&pdev->dev, "probing device %04x:%04x:%04x\n",  in peak_pci_probe()
574 		pdev->vendor, pdev->device, sub_sys_id);  in peak_pci_probe()
591 		dev_err(&pdev->dev, "failed to map PCI resource #0\n");  in peak_pci_probe()
592 		err = -ENOMEM;  in peak_pci_probe()
598 		dev_err(&pdev->dev, "failed to map PCI resource #1\n");  in peak_pci_probe()
599 		err = -ENOMEM;  in peak_pci_probe()
625 	dev_info(&pdev->dev, "%ux CAN %s%s\n",  in peak_pci_probe()
626 		 channels, (const char *)ent->driver_data, fw_str);  in peak_pci_probe()
633 			err = -ENOMEM;  in peak_pci_probe()
638 		chan = priv->priv;  in peak_pci_probe()
640 		chan->cfg_base = cfg_base;  in peak_pci_probe()
641 		priv->reg_base = reg_base + i * PEAK_PCI_CHAN_SIZE;  in peak_pci_probe()
643 		priv->read_reg = peak_pci_read_reg;  in peak_pci_probe()
644 		priv->write_reg = peak_pci_write_reg;  in peak_pci_probe()
645 		priv->post_irq = peak_pci_post_irq;  in peak_pci_probe()
647 		priv->can.clock.freq = PEAK_PCI_CAN_CLOCK;  in peak_pci_probe()
648 		priv->ocr = PEAK_PCI_OCR;  in peak_pci_probe()
649 		priv->cdr = PEAK_PCI_CDR;  in peak_pci_probe()
652 			priv->cdr |= CDR_CLK_OFF;  in peak_pci_probe()
655 		priv->irq_flags = IRQF_SHARED;  in peak_pci_probe()
656 		dev->irq = pdev->irq;  in peak_pci_probe()
658 		chan->icr_mask = peak_pci_icr_masks[i];  in peak_pci_probe()
659 		icr |= chan->icr_mask;  in peak_pci_probe()
661 		SET_NETDEV_DEV(dev, &pdev->dev);  in peak_pci_probe()
662 		dev->dev_id = i;  in peak_pci_probe()
665 		chan->prev_dev = pci_get_drvdata(pdev);  in peak_pci_probe()
668 		/* PCAN-ExpressCard needs some additional i2c init.  in peak_pci_probe()
672 		if (pdev->device == PEAK_PCIEC_DEVICE_ID ||  in peak_pci_probe()
673 		    pdev->device == PEAK_PCIEC34_DEVICE_ID) {  in peak_pci_probe()
676 				dev_err(&pdev->dev,  in peak_pci_probe()
685 			dev_err(&pdev->dev, "failed to register device\n");  in peak_pci_probe()
689 		dev_info(&pdev->dev,  in peak_pci_probe()
691 			 dev->name, priv->reg_base, chan->cfg_base, dev->irq);  in peak_pci_probe()
700 	pci_set_drvdata(pdev, chan->prev_dev);  in peak_pci_probe()
710 		chan = priv->priv;  in peak_pci_probe()
711 		prev_dev = chan->prev_dev;  in peak_pci_probe()
718 	if (chan && chan->pciec_card)  in peak_pci_probe()
719 		peak_pciec_remove(chan->pciec_card);  in peak_pci_probe()
743 	struct peak_pci_chan *chan = priv->priv;  in peak_pci_remove()
744 	void __iomem *cfg_base = chan->cfg_base;  in peak_pci_remove()
745 	void __iomem *reg_base = priv->reg_base;  in peak_pci_remove()
752 		struct net_device *prev_dev = chan->prev_dev;  in peak_pci_remove()
754 		dev_info(&pdev->dev, "removing device %s\n", dev->name);  in peak_pci_remove()
756 		if (!prev_dev && chan->pciec_card)  in peak_pci_remove()
757 			peak_pciec_remove(chan->pciec_card);  in peak_pci_remove()
765 		chan = priv->priv;  in peak_pci_remove()