1/*	$NetBSD: com_puc.c,v 1.18 2008/03/14 15:09:11 cube Exp $	*/
2
3/*
4 * Copyright (c) 1998 Christopher G. Demetriou.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *      This product includes software developed by Christopher G. Demetriou
17 *	for the NetBSD Project.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * Machine-independent ns16x50 serial port ('com') driver attachment to
35 * "PCI Universal Communications" controller driver.
36 *
37 * Author: Christopher G. Demetriou, May 17, 1998.
38 */
39
40#include <sys/cdefs.h>
41__KERNEL_RCSID(0, "$NetBSD: com_puc.c,v 1.18 2008/03/14 15:09:11 cube Exp $");
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/device.h>
46#include <sys/tty.h>
47
48#include <sys/bus.h>
49
50#include <dev/pci/pcivar.h>
51#include <dev/pci/pucvar.h>
52#include <dev/ic/comreg.h>
53#include <dev/ic/comvar.h>
54#include <dev/pci/cybervar.h>
55
56struct com_puc_softc {
57	struct com_softc sc_com;	/* real "com" softc */
58
59	/* puc-specific goo. */
60	void	*sc_ih;			/* interrupt handler */
61};
62
63static int
64com_puc_probe(device_t parent, cfdata_t match, void *aux)
65{
66	struct puc_attach_args *aa = aux;
67
68	/*
69	 * Locators already matched, just check the type.
70	 */
71	if (aa->type != PUC_PORT_TYPE_COM)
72		return (0);
73
74	return (1);
75}
76
77static void
78com_puc_attach(device_t parent, device_t self, void *aux)
79{
80	struct com_puc_softc *psc = device_private(self);
81	struct com_softc *sc = &psc->sc_com;
82	struct puc_attach_args *aa = aux;
83	const char *intrstr;
84
85	sc->sc_dev = self;
86
87	/*
88	 * XXX This driver assumes that 'com' ports attached to 'puc'
89	 * XXX can not be console.  That isn't unreasonable, because PCI
90	 * XXX devices are supposed to be dynamically mapped, and com
91	 * XXX console ports want fixed addresses.  When/if baseboard
92	 * XXX 'com' ports are identified as PCI/communications/serial
93	 * XXX devices and are known to be mapped at the standard
94	 * XXX addresses, if they can be the system console then we have
95	 * XXX to cope with doing the mapping right.  Then this will get
96	 * XXX really ugly.  Of course, by then we might know the real
97	 * XXX definition of PCI/communications/serial, and attach 'com'
98	 * XXX directly on PCI.
99	 */
100
101	aprint_naive(": Serial port\n");
102
103	COM_INIT_REGS(sc->sc_regs, aa->t, aa->h, aa->a);
104	sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
105
106	/* Enable Cyberserial 8X clock. */
107	if (aa->flags & (PUC_COM_SIIG10x|PUC_COM_SIIG20x)) {
108		int usrregno;
109
110		if	(aa->flags & PUC_PORT_USR3) usrregno = 3;
111		else if (aa->flags & PUC_PORT_USR2) usrregno = 2;
112		else if (aa->flags & PUC_PORT_USR1) usrregno = 1;
113		else /* (aa->flags & PUC_PORT_USR0) */ usrregno = 0;
114
115		if (aa->flags & PUC_COM_SIIG10x)
116			write_siig10x_usrreg(aa->pc, aa->tag, usrregno, 1);
117		else
118			write_siig20x_usrreg(aa->pc, aa->tag, usrregno, 1);
119	}
120
121	intrstr = pci_intr_string(aa->pc, aa->intrhandle);
122	psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
123	    comintr, sc);
124	if (psc->sc_ih == NULL) {
125		aprint_error(": couldn't establish interrupt");
126		if (intrstr != NULL)
127			aprint_error(" at %s", intrstr);
128		aprint_error("\n");
129		return;
130	}
131	aprint_normal(": interrupting at %s\n", intrstr);
132	aprint_normal("%s", device_xname(self));
133
134	com_attach_subr(sc);
135}
136
137CFATTACH_DECL_NEW(com_puc, sizeof(struct com_puc_softc),
138    com_puc_probe, com_puc_attach, NULL, NULL);
139