cy_pci.c revision 1.17 
1/*	$NetBSD: cy_pci.c,v 1.17 2003/01/31 00:07:41 thorpej Exp $	*/
2
3/*
4 * cy_pci.c
5 *
6 * Driver for Cyclades Cyclom-8/16/32 multiport serial cards
7 * (currently not tested with Cyclom-32 cards)
8 *
9 * Timo Rossi, 1996
10 */
11
12#include <sys/cdefs.h>
13__KERNEL_RCSID(0, "$NetBSD: cy_pci.c,v 1.17 2003/01/31 00:07:41 thorpej Exp $");
14
15#include <sys/param.h>
16#include <sys/systm.h>
17#include <sys/device.h>
18
19#include <machine/bus.h>
20#include <machine/intr.h>
21
22#include <dev/pci/pcivar.h>
23#include <dev/pci/pcireg.h>
24#include <dev/pci/pcidevs.h>
25
26#include <dev/ic/cd1400reg.h>
27#include <dev/ic/cyreg.h>
28#include <dev/ic/cyvar.h>
29
30struct cy_pci_softc {
31	struct cy_softc sc_cy;		/* real cy softc */
32
33	bus_space_tag_t sc_iot;		/* PLX runtime i/o tag */
34	bus_space_handle_t sc_ioh;	/* PLX runtime i/o handle */
35};
36
37int	cy_pci_match(struct device *, struct cfdata *, void *);
38void	cy_pci_attach(struct device *, struct device *, void *);
39
40CFATTACH_DECL(cy_pci, sizeof(struct cy_pci_softc),
41    cy_pci_match, cy_pci_attach, NULL, NULL);
42
43static const struct cy_pci_product {
44	pci_product_id_t cp_product;	/* product ID */
45	pcireg_t cp_memtype;		/* memory type */
46} cy_pci_products[] = {
47	{ PCI_PRODUCT_CYCLADES_CYCLOMY_1,
48	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
49	{ PCI_PRODUCT_CYCLADES_CYCLOM4Y_1,
50	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
51	{ PCI_PRODUCT_CYCLADES_CYCLOM8Y_1,
52	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
53
54	{ PCI_PRODUCT_CYCLADES_CYCLOMY_2,
55	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
56	{ PCI_PRODUCT_CYCLADES_CYCLOM4Y_2,
57	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
58	{ PCI_PRODUCT_CYCLADES_CYCLOM8Y_2,
59	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
60
61	{ 0,
62	  0 },
63};
64static const int cy_pci_nproducts =
65    sizeof(cy_pci_products) / sizeof(cy_pci_products[0]);
66
67static const struct cy_pci_product *
68cy_pci_lookup(const struct pci_attach_args *pa)
69{
70	const struct cy_pci_product *cp;
71	int i;
72
73	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_CYCLADES)
74		return (NULL);
75
76	for (i = 0; i < cy_pci_nproducts; i++) {
77		cp = &cy_pci_products[i];
78		if (PCI_PRODUCT(pa->pa_id) == cp->cp_product)
79			return (cp);
80	}
81	return (NULL);
82}
83
84int
85cy_pci_match(struct device *parent, struct cfdata *match, void *aux)
86{
87	struct pci_attach_args *pa = aux;
88
89	return (cy_pci_lookup(pa) != NULL);
90}
91
92void
93cy_pci_attach(struct device *parent, struct device *self, void *aux)
94{
95	struct cy_pci_softc *psc = (void *) self;
96	struct cy_softc *sc = (void *) &psc->sc_cy;
97	struct pci_attach_args *pa = aux;
98	pci_intr_handle_t ih;
99	const struct cy_pci_product *cp;
100	const char *intrstr;
101	int plx_ver;
102
103	aprint_naive(": Multi-port serial controller\n");
104
105	sc->sc_bustype = CY_BUSTYPE_PCI;
106
107	cp = cy_pci_lookup(pa);
108	if (cp == NULL)
109		panic("cy_pci_attach: impossible");
110
111	aprint_normal(": Cyclades-Y multiport serial\n");
112
113	if (pci_mapreg_map(pa, 0x14, PCI_MAPREG_TYPE_IO, 0,
114	    &psc->sc_iot, &psc->sc_ioh, NULL, NULL) != 0) {
115		aprint_error("%s: unable to map PLX registers\n",
116		    sc->sc_dev.dv_xname);
117		return;
118	}
119
120	if (pci_mapreg_map(pa, 0x18, cp->cp_memtype, 0,
121	    &sc->sc_memt, &sc->sc_bsh, NULL, NULL) != 0) {
122		aprint_error("%s: unable to map device registers\n",
123		    sc->sc_dev.dv_xname);
124		return;
125	}
126
127	if (cy_find(sc) == 0) {
128		aprint_error("%s: unable to find CD1400s\n",
129		    sc->sc_dev.dv_xname);
130		return;
131	}
132
133	/*
134	 * XXX Like the Cyclades-Z, we should really check the EEPROM to
135	 * determine the "poll or interrupt" setting.  For now, we always
136	 * map the interrupt and enable it in the PLX.
137	 */
138
139	/* Map and establish the interrupt. */
140	if (pci_intr_map(pa, &ih) != 0) {
141		aprint_error(": unable to map interrupt\n");
142		return;
143	}
144	intrstr = pci_intr_string(pa->pa_pc, ih);
145	sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_TTY, cy_intr, sc);
146	if (sc->sc_ih == NULL) {
147		aprint_error(": unable to establish interrupt");
148		if (intrstr != NULL)
149			aprint_normal(" at %s", intrstr);
150		aprint_normal("\n");
151		return;
152	}
153	aprint_normal("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
154
155	cy_attach(sc);
156
157	plx_ver = bus_space_read_1(sc->sc_memt, sc->sc_bsh, CY_PLX_VER) & 0x0f;
158
159	/* Enable PCI card interrupts */
160	switch (plx_ver) {
161	case CY_PLX_9050:
162		bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA_9050,
163		    bus_space_read_2(psc->sc_iot, psc->sc_ioh,
164		    CY_PCI_INTENA_9050) | 0x40);
165		break;
166
167	case CY_PLX_9060:
168	case CY_PLX_9080:
169	default:
170		bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA,
171		    bus_space_read_2(psc->sc_iot, psc->sc_ioh,
172		    CY_PCI_INTENA) | 0x900);
173	}
174}
175