1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
55 static char *hw;	/* pointer to hw=xxx command line string */
59 /* PC Control Register */
62 #define PCR_VPM    2     /* Enable VPM - needed if using RAM above 1 MB */
64 #define PCR_BUS16  8     /* 16-bit bus */
78 /* Modem Control Reg */
102 	u8 phy_node;		/* physical port # - 0 or 1 */
114 	u8 irq;			/* IRQ (3-15) */
116 	port_t ports[2];  member
123 #define sca_reg(reg, card) (0x8000 | (card)->io | \
130 #define port_to_card(port)		((port)->card)
131 #define log_node(port)			((port)->log_node)
132 #define phy_node(port)			((port)->phy_node)
134 #define winbase(card)      	     	((card)->winbase)
135 #define get_port(card, port)		((card)->ports[port].valid ? \
136 					 &(card)->ports[port] : NULL)
140 	return inb(card->io + N2_PSR) & PSR_PAGEBITS;  in sca_get_page()
145 	u8 psr = inb(card->io + N2_PSR);  in openwin()
147 	outb((psr & ~PSR_PAGEBITS) | page, card->io + N2_PSR);  in openwin()
154 	card_t *card = port->card;  in n2_set_iface()
155 	int io = card->io;  in n2_set_iface()
158 	u8 rxs = port->rxs & CLK_BRG_MASK;  in n2_set_iface()
159 	u8 txs = port->txs & CLK_BRG_MASK;  in n2_set_iface()
161 	switch (port->settings.clock_type) {  in n2_set_iface()
163 		mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;  in n2_set_iface()
169 		mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;  in n2_set_iface()
175 		mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;  in n2_set_iface()
181 		mcr &= port->phy_node ? ~CLOCK_OUT_PORT1 : ~CLOCK_OUT_PORT0;  in n2_set_iface()
187 	port->rxs = rxs;  in n2_set_iface()
188 	port->txs = txs;  in n2_set_iface()
197 	int io = port->card->io;  in n2_open()
199 		(port->phy_node ? TX422_PORT1 : TX422_PORT0);  in n2_open()
206 	mcr &= port->phy_node ? ~DTR_PORT1 : ~DTR_PORT0; /* set DTR ON */  in n2_open()
219 	int io = port->card->io;  in n2_close()
221 		(port->phy_node ? TX422_PORT1 : TX422_PORT0);  in n2_close()
224 	mcr |= port->phy_node ? DTR_PORT1 : DTR_PORT0; /* set DTR OFF */  in n2_close()
239 	return -EOPNOTSUPP;  in n2_siocdevprivate()
246 	sync_serial_settings __user *line = ifs->ifs_ifsu.sync;  in n2_ioctl()  local
249 	switch (ifs->type) {  in n2_ioctl()
251 		ifs->type = IF_IFACE_SYNC_SERIAL;  in n2_ioctl()
252 		if (ifs->size < size) {  in n2_ioctl()
253 			ifs->size = size; /* data size wanted */  in n2_ioctl()
254 			return -ENOBUFS;  in n2_ioctl()
256 		if (copy_to_user(line, &port->settings, size))  in n2_ioctl()
257 			return -EFAULT;  in n2_ioctl()
262 			return -EPERM;  in n2_ioctl()
264 		if (copy_from_user(&new_line, line, size))  in n2_ioctl()
265 			return -EFAULT;  in n2_ioctl()
271 			return -EINVAL;	/* No such clock setting */  in n2_ioctl()
274 			return -EINVAL;  in n2_ioctl()
276 		memcpy(&port->settings, &new_line, size); /* Update settings */  in n2_ioctl()
290 		if (card->ports[cnt].card) {  in n2_destroy_card()
291 			struct net_device *dev = port_to_dev(&card->ports[cnt]);  in n2_destroy_card()
296 	if (card->irq)  in n2_destroy_card()
297 		free_irq(card->irq, card);  in n2_destroy_card()
299 	if (card->winbase) {  in n2_destroy_card()
300 		iounmap(card->winbase);  in n2_destroy_card()
301 		release_mem_region(card->phy_winbase, USE_WINDOWSIZE);  in n2_destroy_card()
304 	if (card->io)  in n2_destroy_card()
305 		release_region(card->io, N2_IOPORTS);  in n2_destroy_card()
306 	if (card->ports[0].dev)  in n2_destroy_card()
307 		free_netdev(card->ports[0].dev);  in n2_destroy_card()
308 	if (card->ports[1].dev)  in n2_destroy_card()
309 		free_netdev(card->ports[1].dev);  in n2_destroy_card()
330 		return -ENODEV;  in n2_run()
335 		return -ENODEV;  in n2_run()
340 		return -ENODEV;  in n2_run()
345 		return -ENOBUFS;  in n2_run()
347 	card->ports[0].dev = alloc_hdlcdev(&card->ports[0]);  in n2_run()
348 	card->ports[1].dev = alloc_hdlcdev(&card->ports[1]);  in n2_run()
349 	if (!card->ports[0].dev || !card->ports[1].dev) {  in n2_run()
352 		return -ENOMEM;  in n2_run()
358 		return -EBUSY;  in n2_run()
360 	card->io = io;  in n2_run()
365 		return -EBUSY;  in n2_run()
367 	card->irq = irq;  in n2_run()
372 		return -EBUSY;  in n2_run()
374 	card->phy_winbase = winbase;  in n2_run()
375 	card->winbase = ioremap(winbase, USE_WINDOWSIZE);  in n2_run()
376 	if (!card->winbase) {  in n2_run()
379 		return -EFAULT;  in n2_run()
401 		return -ENODEV;  in n2_run()
407 	card->ram_size = sca_detect_ram(card, card->winbase, MAX_RAM_SIZE);  in n2_run()
410 	i = card->ram_size / ((valid0 + valid1) * (sizeof(pkt_desc) +  in n2_run()
413 	card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);  in n2_run()
414 	card->rx_ring_buffers = i - card->tx_ring_buffers;  in n2_run()
416 	card->buff_offset = (valid0 + valid1) * sizeof(pkt_desc) *  in n2_run()
417 		(card->tx_ring_buffers + card->rx_ring_buffers);  in n2_run()
420 		card->ram_size / 1024, card->irq,  in n2_run()
421 		card->tx_ring_buffers, card->rx_ring_buffers);  in n2_run()
423 	if (card->tx_ring_buffers < 1) {  in n2_run()
426 		return -EIO;  in n2_run()
435 		port_t *port = &card->ports[cnt];  in n2_run()
442 		port->phy_node = cnt;  in n2_run()
443 		port->valid = 1;  in n2_run()
446 			port->log_node = 1;  in n2_run()
448 		spin_lock_init(&port->lock);  in n2_run()
449 		dev->irq = irq;  in n2_run()
450 		dev->mem_start = winbase;  in n2_run()
451 		dev->mem_end = winbase + USE_WINDOWSIZE - 1;  in n2_run()
452 		dev->tx_queue_len = 50;  in n2_run()
453 		dev->netdev_ops = &n2_ops;  in n2_run()
454 		hdlc->attach = sca_attach;  in n2_run()
455 		hdlc->xmit = sca_xmit;  in n2_run()
456 		port->settings.clock_type = CLOCK_EXT;  in n2_run()
457 		port->card = card;  in n2_run()
461 			port->card = NULL;  in n2_run()
463 			return -ENOBUFS;  in n2_run()
467 		netdev_info(dev, "RISCom/N2 node %d\n", port->phy_node);  in n2_run()
471 	new_card = &card->next_card;  in n2_run()
482 		return -EINVAL;	/* no parameters specified, abort */  in n2_init()
489 		long valid[2] = { 0, 0 }; /* Default = both ports disabled */  in n2_init()
520 			return first_card ? 0 : -EINVAL;  in n2_init()
524 	return first_card ? 0 : -EINVAL;  in n2_init()
534 		card = card->next_card;  in n2_cleanup()
546 MODULE_PARM_DESC(hw, "io,irq,ram,ports:io,irq,...");