xref: /netbsd-src/sys/arch/alpha/pci/sio.c (revision 4472dbe5e3bd91ef2540bada7a7ca7384627ff9b)
1 /* $NetBSD: sio.c,v 1.29 2000/06/05 21:47:28 thorpej Exp $ */
2 
3 /*
4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5  * All rights reserved.
6  *
7  * Author: Chris G. Demetriou
8  *
9  * Permission to use, copy, modify and distribute this software and
10  * its documentation is hereby granted, provided that both the copyright
11  * notice and this permission notice appear in all copies of the
12  * software, derivative works or modified versions, and any portions
13  * thereof, and that both notices appear in supporting documentation.
14  *
15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18  *
19  * Carnegie Mellon requests users of this software to return to
20  *
21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22  *  School of Computer Science
23  *  Carnegie Mellon University
24  *  Pittsburgh PA 15213-3890
25  *
26  * any improvements or extensions that they make and grant Carnegie the
27  * rights to redistribute these changes.
28  */
29 
30 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
31 
32 __KERNEL_RCSID(0, "$NetBSD: sio.c,v 1.29 2000/06/05 21:47:28 thorpej Exp $");
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/device.h>
38 
39 #include <machine/intr.h>
40 #include <machine/bus.h>
41 
42 #include <dev/isa/isavar.h>
43 #include <dev/eisa/eisavar.h>
44 
45 #include <dev/pci/pcireg.h>
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pcidevs.h>
48 
49 #include <alpha/pci/siovar.h>
50 
51 struct sio_softc {
52 	struct device	sc_dv;
53 
54 	bus_space_tag_t sc_iot, sc_memt;
55 	bus_dma_tag_t	sc_parent_dmat;
56 	int		sc_haseisa;
57 	int		sc_is82c693;
58 
59 	/* ISA chipset must persist; it's used after autoconfig. */
60 	struct alpha_isa_chipset sc_isa_chipset;
61 };
62 
63 int	siomatch __P((struct device *, struct cfdata *, void *));
64 void	sioattach __P((struct device *, struct device *, void *));
65 
66 struct cfattach sio_ca = {
67 	sizeof(struct sio_softc), siomatch, sioattach,
68 };
69 
70 int	pcebmatch __P((struct device *, struct cfdata *, void *));
71 
72 struct cfattach pceb_ca = {
73 	sizeof(struct sio_softc), pcebmatch, sioattach,
74 };
75 
76 union sio_attach_args {
77 	const char *sa_name;			/* XXX should be common */
78 	struct isabus_attach_args sa_iba;
79 	struct eisabus_attach_args sa_eba;
80 };
81 
82 int	sioprint __P((void *, const char *pnp));
83 void	sio_isa_attach_hook __P((struct device *, struct device *,
84 	    struct isabus_attach_args *));
85 void	sio_eisa_attach_hook __P((struct device *, struct device *,
86 	    struct eisabus_attach_args *));
87 int	sio_eisa_maxslots __P((void *));
88 int	sio_eisa_intr_map __P((void *, u_int, eisa_intr_handle_t *));
89 
90 void	sio_bridge_callback __P((struct device *));
91 
92 int
93 siomatch(parent, match, aux)
94 	struct device *parent;
95 	struct cfdata *match;
96 	void *aux;
97 {
98 	struct pci_attach_args *pa = aux;
99 
100 	/*
101 	 * The Cypress 82C693 is more-or-less an SIO, but with
102 	 * indirect register access.  (XXX for everything, or
103 	 * just the ELCR?)
104 	 */
105 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CONTAQ &&
106 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CONTAQ_82C693 &&
107 	    pa->pa_function == 0)
108 		return (1);
109 
110 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
111 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_SIO)
112 		return (1);
113 
114 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI &&
115 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ALI_M1543)
116 		return (1);
117 
118 	return (0);
119 }
120 
121 int
122 pcebmatch(parent, match, aux)
123 	struct device *parent;
124 	struct cfdata *match;
125 	void *aux;
126 {
127 	struct pci_attach_args *pa = aux;
128 
129 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
130 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PCEB)
131 		return (1);
132 
133 	return (0);
134 }
135 
136 void
137 sioattach(parent, self, aux)
138 	struct device *parent, *self;
139 	void *aux;
140 {
141 	struct sio_softc *sc = (struct sio_softc *)self;
142 	struct pci_attach_args *pa = aux;
143 	char devinfo[256];
144 
145 	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
146 	printf(": %s (rev. 0x%02x)\n", devinfo,
147 	    PCI_REVISION(pa->pa_class));
148 
149 	sc->sc_iot = pa->pa_iot;
150 	sc->sc_memt = pa->pa_memt;
151 	sc->sc_parent_dmat = pa->pa_dmat;
152 	sc->sc_haseisa = (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
153 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PCEB);
154 	sc->sc_is82c693 = (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CONTAQ &&
155 	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CONTAQ_82C693);
156 
157 	config_defer(self, sio_bridge_callback);
158 }
159 
160 void
161 sio_bridge_callback(self)
162 	struct device *self;
163 {
164 	struct sio_softc *sc = (struct sio_softc *)self;
165 	struct alpha_eisa_chipset ec;
166 	union sio_attach_args sa;
167 
168 	if (sc->sc_haseisa) {
169 		ec.ec_v = NULL;
170 		ec.ec_attach_hook = sio_eisa_attach_hook;
171 		ec.ec_maxslots = sio_eisa_maxslots;
172 		ec.ec_intr_map = sio_eisa_intr_map;
173 		ec.ec_intr_string = sio_intr_string;
174 		ec.ec_intr_evcnt = sio_intr_evcnt;
175 		ec.ec_intr_establish = sio_intr_establish;
176 		ec.ec_intr_disestablish = sio_intr_disestablish;
177 
178 		sa.sa_eba.eba_busname = "eisa";
179 		sa.sa_eba.eba_iot = sc->sc_iot;
180 		sa.sa_eba.eba_memt = sc->sc_memt;
181 		sa.sa_eba.eba_dmat =
182 		    alphabus_dma_get_tag(sc->sc_parent_dmat, ALPHA_BUS_EISA);
183 		sa.sa_eba.eba_ec = &ec;
184 		config_found(&sc->sc_dv, &sa.sa_eba, sioprint);
185 	}
186 
187 	sc->sc_isa_chipset.ic_v = NULL;
188 	sc->sc_isa_chipset.ic_attach_hook = sio_isa_attach_hook;
189 	sc->sc_isa_chipset.ic_intr_evcnt = sio_intr_evcnt;
190 	sc->sc_isa_chipset.ic_intr_establish = sio_intr_establish;
191 	sc->sc_isa_chipset.ic_intr_disestablish = sio_intr_disestablish;
192 	sc->sc_isa_chipset.ic_intr_alloc = sio_intr_alloc;
193 
194 	sa.sa_iba.iba_busname = "isa";
195 	sa.sa_iba.iba_iot = sc->sc_iot;
196 	sa.sa_iba.iba_memt = sc->sc_memt;
197 	sa.sa_iba.iba_dmat =
198 	    alphabus_dma_get_tag(sc->sc_parent_dmat, ALPHA_BUS_ISA);
199 	sa.sa_iba.iba_ic = &sc->sc_isa_chipset;
200 	config_found(&sc->sc_dv, &sa.sa_iba, sioprint);
201 }
202 
203 int
204 sioprint(aux, pnp)
205 	void *aux;
206 	const char *pnp;
207 {
208         register union sio_attach_args *sa = aux;
209 
210         if (pnp)
211                 printf("%s at %s", sa->sa_name, pnp);
212         return (UNCONF);
213 }
214 
215 void
216 sio_isa_attach_hook(parent, self, iba)
217 	struct device *parent, *self;
218 	struct isabus_attach_args *iba;
219 {
220 
221 	/* Nothing to do. */
222 }
223 
224 void
225 sio_eisa_attach_hook(parent, self, eba)
226 	struct device *parent, *self;
227 	struct eisabus_attach_args *eba;
228 {
229 
230 	/* Nothing to do. */
231 }
232 
233 int
234 sio_eisa_maxslots(v)
235 	void *v;
236 {
237 
238 	return 16;		/* as good a number as any.  only 8, maybe? */
239 }
240 
241 int
242 sio_eisa_intr_map(v, irq, ihp)
243 	void *v;
244 	u_int irq;
245 	eisa_intr_handle_t *ihp;
246 {
247 
248 #define	ICU_LEN		16	/* number of ISA IRQs (XXX) */
249 
250 	if (irq >= ICU_LEN) {
251 		printf("sio_eisa_intr_map: bad IRQ %d\n", irq);
252 		*ihp = -1;
253 		return 1;
254 	}
255 	if (irq == 2) {
256 		printf("sio_eisa_intr_map: changed IRQ 2 to IRQ 9\n");
257 		irq = 9;
258 	}
259 
260 	*ihp = irq;
261 	return 0;
262 }
263