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 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 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
Indexes created Tue Sep 23 23:09:58 GMT 2025