1 /* $NetBSD: cy_pci.c,v 1.26 2018/12/09 11:14:02 jdolecek 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 1.26 2018/12/09 11:14:02 jdolecek 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
30 struct 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
37 static 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 };
58 static const int cy_pci_nproducts =
59 sizeof(cy_pci_products) / sizeof(cy_pci_products[0]);
60
61 static const struct cy_pci_product *
cy_pci_lookup(const struct pci_attach_args * pa)62 cy_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
78 static int
cy_pci_match(device_t parent,cfdata_t match,void * aux)79 cy_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
86 static void
cy_pci_attach(device_t parent,device_t self,void * aux)87 cy_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 char intrbuf[PCI_INTRSTR_LEN];
97
98 sc->sc_dev = self;
99
100 aprint_naive(": Multi-port serial controller\n");
101
102 sc->sc_bustype = CY_BUSTYPE_PCI;
103
104 cp = cy_pci_lookup(pa);
105 if (cp == NULL)
106 panic("cy_pci_attach: impossible");
107
108 aprint_normal(": Cyclades-Y multiport serial\n");
109
110 if (pci_mapreg_map(pa, 0x14, PCI_MAPREG_TYPE_IO, 0,
111 &psc->sc_iot, &psc->sc_ioh, NULL, NULL) != 0) {
112 aprint_error_dev(sc->sc_dev, "unable to map PLX registers\n");
113 return;
114 }
115
116 if (pci_mapreg_map(pa, 0x18, cp->cp_memtype, 0,
117 &sc->sc_memt, &sc->sc_bsh, NULL, NULL) != 0) {
118 aprint_error_dev(sc->sc_dev,
119 "unable to map device registers\n");
120 return;
121 }
122
123 if (cy_find(sc) == 0) {
124 aprint_error_dev(sc->sc_dev, "unable to find CD1400s\n");
125 return;
126 }
127
128 /*
129 * XXX Like the Cyclades-Z, we should really check the EEPROM to
130 * determine the "poll or interrupt" setting. For now, we always
131 * map the interrupt and enable it in the PLX.
132 */
133
134 /* Map and establish the interrupt. */
135 if (pci_intr_map(pa, &ih) != 0) {
136 aprint_error_dev(sc->sc_dev, "unable to map interrupt\n");
137 return;
138 }
139 intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));
140 sc->sc_ih = pci_intr_establish_xname(pa->pa_pc, ih, IPL_TTY, cy_intr,
141 sc, device_xname(self));
142 if (sc->sc_ih == NULL) {
143 aprint_error_dev(sc->sc_dev, "unable to establish interrupt");
144 if (intrstr != NULL)
145 aprint_error(" at %s", intrstr);
146 aprint_error("\n");
147 return;
148 }
149 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);
150
151 cy_attach(sc);
152
153 plx_ver = bus_space_read_1(sc->sc_memt, sc->sc_bsh, CY_PLX_VER) & 0x0f;
154
155 /* Enable PCI card interrupts */
156 switch (plx_ver) {
157 case CY_PLX_9050:
158 bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA_9050,
159 bus_space_read_2(psc->sc_iot, psc->sc_ioh,
160 CY_PCI_INTENA_9050) | 0x40);
161 break;
162
163 case CY_PLX_9060:
164 case CY_PLX_9080:
165 default:
166 bus_space_write_2(psc->sc_iot, psc->sc_ioh, CY_PCI_INTENA,
167 bus_space_read_2(psc->sc_iot, psc->sc_ioh,
168 CY_PCI_INTENA) | 0x900);
169 }
170 }
171
172 CFATTACH_DECL_NEW(cy_pci, sizeof(struct cy_pci_softc),
173 cy_pci_match, cy_pci_attach, NULL, NULL);
174