1 /* $NetBSD: com_puc.c,v 1.17 2007/10/19 12:00:41 ad 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 1.17 2007/10/19 12:00:41 ad 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(struct device *parent, struct cfdata *match, 65 void *aux) 66 { 67 struct puc_attach_args *aa = aux; 68 69 /* 70 * Locators already matched, just check the type. 71 */ 72 if (aa->type != PUC_PORT_TYPE_COM) 73 return (0); 74 75 return (1); 76 } 77 78 static void 79 com_puc_attach(struct device *parent, struct device *self, void *aux) 80 { 81 struct com_puc_softc *psc = (void *)self; 82 struct com_softc *sc = &psc->sc_com; 83 struct puc_attach_args *aa = aux; 84 const char *intrstr; 85 86 /* 87 * XXX This driver assumes that 'com' ports attached to 'puc' 88 * XXX can not be console. That isn't unreasonable, because PCI 89 * XXX devices are supposed to be dynamically mapped, and com 90 * XXX console ports want fixed addresses. When/if baseboard 91 * XXX 'com' ports are identified as PCI/communications/serial 92 * XXX devices and are known to be mapped at the standard 93 * XXX addresses, if they can be the system console then we have 94 * XXX to cope with doing the mapping right. Then this will get 95 * XXX really ugly. Of course, by then we might know the real 96 * XXX definition of PCI/communications/serial, and attach 'com' 97 * XXX directly on PCI. 98 */ 99 100 aprint_naive(": Serial port\n"); 101 102 COM_INIT_REGS(sc->sc_regs, aa->t, aa->h, aa->a); 103 sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK; 104 105 /* Enable Cyberserial 8X clock. */ 106 if (aa->flags & (PUC_COM_SIIG10x|PUC_COM_SIIG20x)) { 107 int usrregno; 108 109 if (aa->flags & PUC_PORT_USR3) usrregno = 3; 110 else if (aa->flags & PUC_PORT_USR2) usrregno = 2; 111 else if (aa->flags & PUC_PORT_USR1) usrregno = 1; 112 else /* (aa->flags & PUC_PORT_USR0) */ usrregno = 0; 113 114 if (aa->flags & PUC_COM_SIIG10x) 115 write_siig10x_usrreg(aa->pc, aa->tag, usrregno, 1); 116 else 117 write_siig20x_usrreg(aa->pc, aa->tag, usrregno, 1); 118 } 119 120 intrstr = pci_intr_string(aa->pc, aa->intrhandle); 121 psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL, 122 comintr, sc); 123 if (psc->sc_ih == NULL) { 124 aprint_error(": couldn't establish interrupt"); 125 if (intrstr != NULL) 126 aprint_normal(" at %s", intrstr); 127 aprint_normal("\n"); 128 return; 129 } 130 aprint_normal(": interrupting at %s\n", intrstr); 131 aprint_normal("%s", sc->sc_dev.dv_xname); 132 133 com_attach_subr(sc); 134 } 135 136 CFATTACH_DECL(com_puc, sizeof(struct com_puc_softc), 137 com_puc_probe, com_puc_attach, NULL, NULL); 138