1 /* $NetBSD: com_puc.c,v 1.27 2021/03/25 05:33:59 rin 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 1.27 2021/03/25 05:33:59 rin 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
56 struct 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
63 /* Interface field in PCI Class register */
64 static const char *serialtype[] = {
65 "Generic XT",
66 "16450",
67 "16550",
68 "16650",
69 "16750",
70 "16850",
71 "16950",
72 };
73
74 static int
com_puc_probe(device_t parent,cfdata_t match,void * aux)75 com_puc_probe(device_t parent, cfdata_t match, void *aux)
76 {
77 struct puc_attach_args *aa = aux;
78
79 /*
80 * Locators already matched, just check the type.
81 */
82 if (aa->type != PUC_PORT_TYPE_COM)
83 return (0);
84
85 return (1);
86 }
87
88 static void
com_puc_attach(device_t parent,device_t self,void * aux)89 com_puc_attach(device_t parent, device_t self, void *aux)
90 {
91 struct com_puc_softc *psc = device_private(self);
92 struct com_softc *sc = &psc->sc_com;
93 struct puc_attach_args *aa = aux;
94 const char *intrstr = NULL;
95 char intrbuf[PCI_INTRSTR_LEN];
96 unsigned int iface;
97
98 sc->sc_dev = self;
99
100 iface = PCI_INTERFACE(pci_conf_read(aa->pc, aa->tag, PCI_CLASS_REG));
101 aprint_naive(": Serial port");
102 if (iface < __arraycount(serialtype))
103 aprint_normal(" (%s-compatible)", serialtype[iface]);
104 aprint_normal(": ");
105
106 com_init_regs(&sc->sc_regs, aa->t, aa->h, aa->a);
107 sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
108
109 if (!aa->poll) {
110 intrstr = pci_intr_string(aa->pc, aa->intrhandle, intrbuf,
111 sizeof(intrbuf));
112 psc->sc_ih = pci_intr_establish_xname(aa->pc, aa->intrhandle,
113 IPL_SERIAL, comintr, sc, device_xname(self));
114 if (psc->sc_ih == NULL) {
115 aprint_error("couldn't establish interrupt");
116 if (intrstr != NULL)
117 aprint_error(" at %s", intrstr);
118 aprint_error("\n");
119 return;
120 }
121 } else {
122 sc->sc_poll_ticks = 1;
123 }
124
125 #if defined(amd64) || defined(i386)
126 /*
127 * Since puc(4) serial ports are typically not identified in the
128 * BIOS COM[1234] table, the I/O address must be manually set using
129 * installboot(8) in order to enable a serial console.
130 * Print the address here so the user doesn't have to dig through
131 * PCI configuration space to find it.
132 */
133 if (aa->h < 0x10000)
134 aprint_normal("ioaddr 0x%04lx, ", aa->h);
135 #endif
136 if (!aa->poll)
137 aprint_normal("interrupting at %s\n", intrstr);
138 else
139 aprint_normal("polling\n");
140
141 /* Enable Cyberserial 8X clock. */
142 if (aa->flags & (PUC_COM_SIIG10x|PUC_COM_SIIG20x)) {
143 int usrregno;
144
145 if (aa->flags & PUC_PORT_USR3) usrregno = 3;
146 else if (aa->flags & PUC_PORT_USR2) usrregno = 2;
147 else if (aa->flags & PUC_PORT_USR1) usrregno = 1;
148 else /* (aa->flags & PUC_PORT_USR0) */ usrregno = 0;
149
150 if (aa->flags & PUC_COM_SIIG10x)
151 write_siig10x_usrreg(aa->pc, aa->tag, usrregno, 1);
152 else
153 write_siig20x_usrreg(aa->pc, aa->tag, usrregno, 1);
154 } else {
155 if (!pmf_device_register(self, NULL, com_resume))
156 aprint_error_dev(self,
157 "couldn't establish power handler\n");
158 }
159
160 aprint_normal("%s", device_xname(self));
161 com_attach_subr(sc);
162 }
163
164 CFATTACH_DECL_NEW(com_puc, sizeof(struct com_puc_softc),
165 com_puc_probe, com_puc_attach, NULL, NULL);
166