1 /* $OpenBSD: siop_gsc.c,v 1.6 2024/05/22 14:25:47 jsg Exp $ */
2
3 /*
4 * Copyright (c) 2007 Mark Kettenis
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/device.h>
21 #include <sys/systm.h>
22
23 #include <machine/autoconf.h>
24 #include <machine/bus.h>
25 #include <machine/iomod.h>
26
27 #include <scsi/scsi_all.h>
28 #include <scsi/scsiconf.h>
29
30 #include <dev/ic/siopreg.h>
31 #include <dev/ic/siopvar_common.h>
32 #include <dev/ic/siopvar.h>
33
34 #include <hppa/dev/cpudevs.h>
35 #include <hppa/gsc/gscbusvar.h>
36
37 #define SIOP_GSC_RESET 0x0000
38 #define SIOP_GSC_OFFSET 0x0100
39
40 int siop_gsc_match(struct device *, void *, void *);
41 void siop_gsc_attach(struct device *, struct device *, void *);
42 void siop_gsc_reset(struct siop_common_softc *);
43
44 u_int8_t siop_gsc_r1(void *, bus_space_handle_t, bus_size_t);
45 u_int16_t siop_gsc_r2(void *, bus_space_handle_t, bus_size_t);
46 void siop_gsc_w1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
47 void siop_gsc_w2(void *, bus_space_handle_t, bus_size_t, u_int16_t);
48
49 struct siop_gsc_softc {
50 struct siop_softc sc_siop;
51 bus_space_tag_t sc_iot;
52 bus_space_handle_t sc_ioh;
53 struct hppa_bus_space_tag sc_bustag;
54 };
55
56 const struct cfattach siop_gsc_ca = {
57 sizeof(struct siop_gsc_softc), siop_gsc_match, siop_gsc_attach
58 };
59
60 int
siop_gsc_match(struct device * parent,void * match,void * aux)61 siop_gsc_match(struct device *parent, void *match, void *aux)
62 {
63 struct gsc_attach_args *ga = aux;
64
65 if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
66 ga->ga_type.iodc_sv_model != HPPA_FIO_FWSCSI)
67 return 0;
68
69 return 1;
70 }
71
72 void
siop_gsc_attach(struct device * parent,struct device * self,void * aux)73 siop_gsc_attach(struct device *parent, struct device *self, void *aux)
74 {
75 struct siop_gsc_softc *sc = (struct siop_gsc_softc *)self;
76 struct gsc_attach_args *ga = aux;
77
78 sc->sc_iot = ga->ga_iot;
79 if (bus_space_map(sc->sc_iot, ga->ga_hpa,
80 IOMOD_HPASIZE, 0, &sc->sc_ioh)) {
81 printf(": cannot map io space\n");
82 return;
83 }
84
85 sc->sc_bustag = *sc->sc_iot;
86 sc->sc_bustag.hbt_r1 = siop_gsc_r1;
87 sc->sc_bustag.hbt_r2 = siop_gsc_r2;
88 sc->sc_bustag.hbt_w1 = siop_gsc_w1;
89 sc->sc_bustag.hbt_w2 = siop_gsc_w2;
90
91 sc->sc_siop.sc_c.features = SF_CHIP_PF | SF_CHIP_BE | SF_BUS_WIDE;
92 sc->sc_siop.sc_c.maxburst = 4;
93 sc->sc_siop.sc_c.maxoff = 8;
94 sc->sc_siop.sc_c.clock_div = 3;
95 sc->sc_siop.sc_c.clock_period = 250;
96 sc->sc_siop.sc_c.ram_size = 0;
97
98 sc->sc_siop.sc_c.sc_reset = siop_gsc_reset;
99 sc->sc_siop.sc_c.sc_dmat = ga->ga_dmatag;
100
101 sc->sc_siop.sc_c.sc_rt = &sc->sc_bustag;
102 bus_space_subregion(sc->sc_iot, sc->sc_ioh, SIOP_GSC_OFFSET,
103 IOMOD_HPASIZE - SIOP_GSC_OFFSET, &sc->sc_siop.sc_c.sc_rh);
104
105 /*
106 * Reset the SCSI subsystem.
107 */
108 bus_space_write_1(sc->sc_iot, sc->sc_ioh, SIOP_GSC_RESET, 0);
109 DELAY(1000);
110 siop_gsc_reset(&sc->sc_siop.sc_c);
111
112 gsc_intr_establish((struct gsc_softc *)parent, ga->ga_irq,
113 IPL_BIO, siop_intr, sc, sc->sc_siop.sc_c.sc_dev.dv_xname);
114
115 printf(": NCR53C720 rev %d\n", bus_space_read_1(sc->sc_siop.sc_c.sc_rt,
116 sc->sc_siop.sc_c.sc_rh, SIOP_CTEST3) >> 4);
117
118 siop_attach(&sc->sc_siop);
119 }
120
121 void
siop_gsc_reset(struct siop_common_softc * sc)122 siop_gsc_reset(struct siop_common_softc *sc)
123 {
124 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL, DCNTL_EA);
125 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST0, CTEST0_EHP);
126 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4, CTEST4_MUX);
127
128 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STIME0,
129 (0xc << STIME0_SEL_SHIFT));
130 }
131
132 u_int8_t
siop_gsc_r1(void * v,bus_space_handle_t h,bus_size_t o)133 siop_gsc_r1(void *v, bus_space_handle_t h, bus_size_t o)
134 {
135 return *(volatile u_int8_t *)(h + (o ^ 3));
136 }
137
138 u_int16_t
siop_gsc_r2(void * v,bus_space_handle_t h,bus_size_t o)139 siop_gsc_r2(void *v, bus_space_handle_t h, bus_size_t o)
140 {
141 if (o == SIOP_SIST0) {
142 u_int16_t reg;
143
144 reg = siop_gsc_r1(v, h, SIOP_SIST0);
145 reg |= siop_gsc_r1(v, h, SIOP_SIST1) << 8;
146 return reg;
147 }
148 return *(volatile u_int16_t *)(h + (o ^ 2));
149 }
150
151 void
siop_gsc_w1(void * v,bus_space_handle_t h,bus_size_t o,u_int8_t vv)152 siop_gsc_w1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t vv)
153 {
154 *(volatile u_int8_t *)(h + (o ^ 3)) = vv;
155 }
156
157 void
siop_gsc_w2(void * v,bus_space_handle_t h,bus_size_t o,u_int16_t vv)158 siop_gsc_w2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t vv)
159 {
160 *(volatile u_int16_t *)(h + (o ^ 2)) = vv;
161 }
162