1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright (C) 2010 Markus Plessing <plessing@ems-wuensche.com>
22 MODULE_AUTHOR("Markus Plessing <plessing@ems-wuensche.com>");
23 MODULE_DESCRIPTION("Socket-CAN driver for EMS CPC-CARD cards");
39  * RX1 is connected to ground.
40  * TX1 is not connected.
41  * CLKO is not connected.
43  * This means  normal output mode , push-pull and the correct polarity.
54 #define EMS_PCMCIA_MEM_SIZE 4096 /* Size of the remapped io-memory */
63 	PCMCIA_DEVICE_PROD_ID123("EMS_T_W", "CPC-Card", "V2.0", 0xeab1ea23,
72 	return readb(priv->reg_base + port);  in ems_pcmcia_read_reg()
78 	writeb(val, priv->reg_base + port);  in ems_pcmcia_write_reg()
89 	if (readw(card->base_addr) != 0xAA55)  in ems_pcmcia_interrupt()
96 		for (i = 0; i < card->channels; i++) {  in ems_pcmcia_interrupt()
97 			dev = card->net_dev[i];  in ems_pcmcia_interrupt()
123 	/* read reset-values */  in ems_pcmcia_check_chan()
132 	struct ems_pcmcia_card *card = pdev->priv;  in ems_pcmcia_del_card()
136 	free_irq(pdev->irq, card);  in ems_pcmcia_del_card()
138 	for (i = 0; i < card->channels; i++) {  in ems_pcmcia_del_card()
139 		dev = card->net_dev[i];  in ems_pcmcia_del_card()
144 		       DRV_NAME, dev->name, i);  in ems_pcmcia_del_card()
149 	writeb(EMS_CMD_UMAP, card->base_addr);  in ems_pcmcia_del_card()
150 	iounmap(card->base_addr);  in ems_pcmcia_del_card()
153 	pdev->priv = NULL;  in ems_pcmcia_del_card()
158  * CAN channel to SJA1000 Socket-CAN subsystem.
170 		return -ENOMEM;  in ems_pcmcia_add_card()
172 	pdev->priv = card;  in ems_pcmcia_add_card()
173 	card->channels = 0;  in ems_pcmcia_add_card()
175 	card->base_addr = ioremap(base, EMS_PCMCIA_MEM_SIZE);  in ems_pcmcia_add_card()
176 	if (!card->base_addr) {  in ems_pcmcia_add_card()
177 		err = -ENOMEM;  in ems_pcmcia_add_card()
182 	if (readw(card->base_addr) != 0xAA55) {  in ems_pcmcia_add_card()
183 		err = -ENODEV;  in ems_pcmcia_add_card()
188 	writeb(EMS_CMD_RESET, card->base_addr);  in ems_pcmcia_add_card()
191 	writeb(EMS_CMD_MAP, card->base_addr);  in ems_pcmcia_add_card()
197 			err = -ENOMEM;  in ems_pcmcia_add_card()
201 		card->net_dev[i] = dev;  in ems_pcmcia_add_card()
203 		priv->priv = card;  in ems_pcmcia_add_card()
204 		SET_NETDEV_DEV(dev, &pdev->dev);  in ems_pcmcia_add_card()
205 		dev->dev_id = i;  in ems_pcmcia_add_card()
207 		priv->irq_flags = IRQF_SHARED;  in ems_pcmcia_add_card()
208 		dev->irq = pdev->irq;  in ems_pcmcia_add_card()
209 		priv->reg_base = card->base_addr + EMS_PCMCIA_CAN_BASE_OFFSET +  in ems_pcmcia_add_card()
214 			priv->read_reg  = ems_pcmcia_read_reg;  in ems_pcmcia_add_card()
215 			priv->write_reg = ems_pcmcia_write_reg;  in ems_pcmcia_add_card()
216 			priv->can.clock.freq = EMS_PCMCIA_CAN_CLOCK;  in ems_pcmcia_add_card()
217 			priv->ocr = EMS_PCMCIA_OCR;  in ems_pcmcia_add_card()
218 			priv->cdr = EMS_PCMCIA_CDR;  in ems_pcmcia_add_card()
219 			priv->flags |= SJA1000_CUSTOM_IRQ_HANDLER;  in ems_pcmcia_add_card()
228 			card->channels++;  in ems_pcmcia_add_card()
231 			       "#%d at 0x%p, irq %d\n", DRV_NAME, dev->name,  in ems_pcmcia_add_card()
232 			       i, priv->reg_base, dev->irq);  in ems_pcmcia_add_card()
237 	if (!card->channels) {  in ems_pcmcia_add_card()
238 		err = -ENODEV;  in ems_pcmcia_add_card()
242 	err = request_irq(pdev->irq, &ems_pcmcia_interrupt, IRQF_SHARED,  in ems_pcmcia_add_card()
253  * Setup PCMCIA socket and probe for EMS CPC-CARD
260 	dev->config_flags |= CONF_ENABLE_IRQ;  in ems_pcmcia_probe()
261 	dev->config_index = 1;  in ems_pcmcia_probe()
262 	dev->config_regs = PRESENT_OPTION;  in ems_pcmcia_probe()
265 	dev->resource[0]->end = 16;  in ems_pcmcia_probe()
266 	dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;  in ems_pcmcia_probe()
267 	dev->resource[1]->end = 16;  in ems_pcmcia_probe()
268 	dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;  in ems_pcmcia_probe()
269 	dev->io_lines = 5;  in ems_pcmcia_probe()
272 	dev->resource[2]->flags =  in ems_pcmcia_probe()
274 	dev->resource[2]->start = dev->resource[2]->end = 0;  in ems_pcmcia_probe()
276 	csval = pcmcia_request_window(dev, dev->resource[2], 0);  in ems_pcmcia_probe()
278 		dev_err(&dev->dev, "pcmcia_request_window failed (err=%d)\n",  in ems_pcmcia_probe()
283 	csval = pcmcia_map_mem_page(dev, dev->resource[2], dev->config_base);  in ems_pcmcia_probe()
285 		dev_err(&dev->dev, "pcmcia_map_mem_page failed (err=%d)\n",  in ems_pcmcia_probe()
292 		dev_err(&dev->dev, "pcmcia_enable_device failed (err=%d)\n",  in ems_pcmcia_probe()
297 	ems_pcmcia_add_card(dev, dev->resource[2]->start);  in ems_pcmcia_probe()