cy_pci.c revision 1.23 
1/*	$NetBSD: cy_pci.c,v 1.23 2008/03/26 17:50:32 matt 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 1.23 2008/03/26 17:50:32 matt Exp $");
14
15#include <sys/param.h>
16#include <sys/systm.h>
17#include <sys/device.h>
18
19#include <sys/bus.h>
20#include <sys/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
37static const struct cy_pci_product {
38	pci_product_id_t cp_product;	/* product ID */
39	pcireg_t cp_memtype;		/* memory type */
40} cy_pci_products[] = {
41	{ PCI_PRODUCT_CYCLADES_CYCLOMY_1,
42	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
43	{ PCI_PRODUCT_CYCLADES_CYCLOM4Y_1,
44	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
45	{ PCI_PRODUCT_CYCLADES_CYCLOM8Y_1,
46	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT_1M },
47
48	{ PCI_PRODUCT_CYCLADES_CYCLOMY_2,
49	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
50	{ PCI_PRODUCT_CYCLADES_CYCLOM4Y_2,
51	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
52	{ PCI_PRODUCT_CYCLADES_CYCLOM8Y_2,
53	  PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT },
54
55	{ 0,
56	  0 },
57};
58static const int cy_pci_nproducts =
59    sizeof(cy_pci_products) / sizeof(cy_pci_products[0]);
60
61static const struct cy_pci_product *
62cy_pci_lookup(const struct pci_attach_args *pa)
63{
64	const struct cy_pci_product *cp;
65	int i;
66
67	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_CYCLADES)
68		return (NULL);
69
70	for (i = 0; i < cy_pci_nproducts; i++) {
71		cp = &cy_pci_products[i];
72		if (PCI_PRODUCT(pa->pa_id) == cp->cp_product)
73			return (cp);
74	}
75	return (NULL);
76}
77
78static int
79cy_pci_match(device_t parent, cfdata_t match, void *aux)
80{
81	struct pci_attach_args *pa = aux;
82
83	return (cy_pci_lookup(pa) != NULL);
84}
85
86static void
87cy_pci_attach(device_t parent, device_t self, void *aux)
88{
89	struct cy_pci_softc *psc = device_private(self);
90	struct cy_softc *sc = &psc->sc_cy;
91	struct pci_attach_args *pa = aux;
92	pci_intr_handle_t ih;
93	const struct cy_pci_product *cp;
94	const char *intrstr;
95	int plx_ver;
96
97	sc->sc_dev = self;
98
99	aprint_naive(": Multi-port serial controller\n");
100
101	sc->sc_bustype = CY_BUSTYPE_PCI;
102
103	cp = cy_pci_lookup(pa);
104	if (cp == NULL)
105		panic("cy_pci_attach: impossible");
106
107	aprint_normal(": Cyclades-Y multiport serial\n");
108
109	if (pci_mapreg_map(pa, 0x14, PCI_MAPREG_TYPE_IO, 0,
110	    &psc->sc_iot, &psc->sc_ioh, NULL, NULL) != 0) {
111		aprint_error_dev(sc->sc_dev, "unable to map PLX registers\n");
112		return;
113	}
114
115	if (pci_mapreg_map(pa, 0x18, cp->cp_memtype, 0,
116	    &sc->sc_memt, &sc->sc_bsh, NULL, NULL) != 0) {
117		aprint_error_dev(sc->sc_dev,"unable to map device registers\n");
118		return;
119	}
120
121	if (cy_find(sc) == 0) {
122		aprint_error_dev(sc->sc_dev, "unable to find CD1400s\n");
123		return;
124	}
125
126	/*
127	 * XXX Like the Cyclades-Z, we should really check the EEPROM to
128	 * determine the "poll or interrupt" setting.  For now, we always
129	 * map the interrupt and enable it in the PLX.
130	 */
131
132	/* Map and establish the interrupt. */
133	if (pci_intr_map(pa, &ih) != 0) {
134		aprint_error_dev(sc->sc_dev, "unable to map interrupt\n");
135		return;
136	}
137	intrstr = pci_intr_string(pa->pa_pc, ih);
138	sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_TTY, cy_intr, sc);
139	if (sc->sc_ih == NULL) {
140		aprint_error_dev(sc->sc_dev, "unable to establish interrupt");
141		if (intrstr != NULL)
142			aprint_error(" at %s", intrstr);
143		aprint_error("\n");
144		return;
145	}
146	aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);
147
148	cy_attach(sc);
149
150	plx_ver = bus_space_read_1(sc->sc_memt, sc->sc_bsh, CY_PLX_VER) & 0x0f;
151
152	/* Enable PCI card interrupts */
153	switch (plx_ver) {
154	case CY_PLX_9050:
155		bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA_9050,
156		    bus_space_read_2(psc->sc_iot, psc->sc_ioh,
157		    CY_PCI_INTENA_9050) | 0x40);
158		break;
159
160	case CY_PLX_9060:
161	case CY_PLX_9080:
162	default:
163		bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA,
164		    bus_space_read_2(psc->sc_iot, psc->sc_ioh,
165		    CY_PCI_INTENA) | 0x900);
166	}
167}
168
169CFATTACH_DECL_NEW(cy_pci, sizeof(struct cy_pci_softc),
170    cy_pci_match, cy_pci_attach, NULL, NULL);
171