1 /* $NetBSD: com_puc.c,v 1.19 2009/11/26 15:17:09 njoly 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 1.19 2009/11/26 15:17:09 njoly 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 static int 64 com_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 77 static void 78 com_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 } 136 137 CFATTACH_DECL_NEW(com_puc, sizeof(struct com_puc_softc), 138 com_puc_probe, com_puc_attach, NULL, NULL); 139