1 /* $OpenBSD: siop_sgc.c,v 1.3 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
36 #define IO_II_INTEN 0x20000000
37 #define IO_II_PACKEN 0x10000000
38 #define IO_II_PREFETCHEN 0x08000000
39
40 int siop_sgc_match(struct device *, void *, void *);
41 void siop_sgc_attach(struct device *, struct device *, void *);
42 void siop_sgc_reset(struct siop_common_softc *);
43
44 u_int8_t siop_sgc_r1(void *, bus_space_handle_t, bus_size_t);
45 u_int16_t siop_sgc_r2(void *, bus_space_handle_t, bus_size_t);
46 void siop_sgc_w1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
47 void siop_sgc_w2(void *, bus_space_handle_t, bus_size_t, u_int16_t);
48
49 struct siop_sgc_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_gedoens_ca = {
57 sizeof(struct siop_sgc_softc), siop_sgc_match, siop_sgc_attach
58 };
59
60 int
siop_sgc_match(struct device * parent,void * match,void * aux)61 siop_sgc_match(struct device *parent, void *match, void *aux)
62 {
63 struct confargs *ca = aux;
64
65 if (ca->ca_type.iodc_type != HPPA_TYPE_ADMA ||
66 ca->ca_type.iodc_sv_model != HPPA_ADMA_FWSCSI)
67 return 0;
68
69 return 1;
70 }
71
72 void
siop_sgc_attach(struct device * parent,struct device * self,void * aux)73 siop_sgc_attach(struct device *parent, struct device *self, void *aux)
74 {
75 struct siop_sgc_softc *sc = (struct siop_sgc_softc *)self;
76 struct confargs *ca = aux;
77 volatile struct iomod *regs;
78
79 sc->sc_iot = ca->ca_iot;
80 if (bus_space_map(sc->sc_iot, ca->ca_hpa,
81 IOMOD_HPASIZE, 0, &sc->sc_ioh)) {
82 printf(": cannot map io space\n");
83 return;
84 }
85
86 sc->sc_bustag = *sc->sc_iot;
87 sc->sc_bustag.hbt_r1 = siop_sgc_r1;
88 sc->sc_bustag.hbt_r2 = siop_sgc_r2;
89 sc->sc_bustag.hbt_w1 = siop_sgc_w1;
90 sc->sc_bustag.hbt_w2 = siop_sgc_w2;
91
92 sc->sc_siop.sc_c.features = SF_CHIP_PF | SF_CHIP_BE | SF_BUS_WIDE;
93 sc->sc_siop.sc_c.maxburst = 4;
94 sc->sc_siop.sc_c.maxoff = 8;
95 sc->sc_siop.sc_c.clock_div = 3;
96 sc->sc_siop.sc_c.clock_period = 250;
97 sc->sc_siop.sc_c.ram_size = 0;
98
99 sc->sc_siop.sc_c.sc_reset = siop_sgc_reset;
100 sc->sc_siop.sc_c.sc_dmat = ca->ca_dmatag;
101
102 sc->sc_siop.sc_c.sc_rt = &sc->sc_bustag;
103 bus_space_subregion(sc->sc_iot, sc->sc_ioh, IOMOD_DEVOFFSET,
104 IOMOD_HPASIZE - IOMOD_DEVOFFSET, &sc->sc_siop.sc_c.sc_rh);
105
106 regs = bus_space_vaddr(sc->sc_iot, sc->sc_ioh);
107 regs->io_command = CMD_RESET;
108 while ((regs->io_status & IO_ERR_MEM_RY) == 0)
109 delay(100);
110 regs->io_ii_rw = IO_II_PACKEN | IO_II_PREFETCHEN;
111
112 siop_sgc_reset(&sc->sc_siop.sc_c);
113
114 regs->io_eim = cpu_gethpa(0) | (31 - ca->ca_irq);
115 regs->io_ii_rw |= IO_II_INTEN;
116 cpu_intr_establish(IPL_BIO, ca->ca_irq, siop_intr, sc,
117 sc->sc_siop.sc_c.sc_dev.dv_xname);
118
119 printf(": NCR53C720 rev %d\n", bus_space_read_1(sc->sc_siop.sc_c.sc_rt,
120 sc->sc_siop.sc_c.sc_rh, SIOP_CTEST3) >> 4);
121
122 siop_attach(&sc->sc_siop);
123 }
124
125 void
siop_sgc_reset(struct siop_common_softc * sc)126 siop_sgc_reset(struct siop_common_softc *sc)
127 {
128 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL, DCNTL_EA);
129 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST0, CTEST0_EHP);
130 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST4, CTEST4_MUX);
131
132 bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STIME0,
133 (0xc << STIME0_SEL_SHIFT));
134 }
135
136 u_int8_t
siop_sgc_r1(void * v,bus_space_handle_t h,bus_size_t o)137 siop_sgc_r1(void *v, bus_space_handle_t h, bus_size_t o)
138 {
139 return *(volatile u_int8_t *)(h + (o ^ 3));
140 }
141
142 u_int16_t
siop_sgc_r2(void * v,bus_space_handle_t h,bus_size_t o)143 siop_sgc_r2(void *v, bus_space_handle_t h, bus_size_t o)
144 {
145 if (o == SIOP_SIST0) {
146 u_int16_t reg;
147
148 reg = siop_sgc_r1(v, h, SIOP_SIST0);
149 reg |= siop_sgc_r1(v, h, SIOP_SIST1) << 8;
150 return reg;
151 }
152 return *(volatile u_int16_t *)(h + (o ^ 2));
153 }
154
155 void
siop_sgc_w1(void * v,bus_space_handle_t h,bus_size_t o,u_int8_t vv)156 siop_sgc_w1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t vv)
157 {
158 *(volatile u_int8_t *)(h + (o ^ 3)) = vv;
159 }
160
161 void
siop_sgc_w2(void * v,bus_space_handle_t h,bus_size_t o,u_int16_t vv)162 siop_sgc_w2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t vv)
163 {
164 *(volatile u_int16_t *)(h + (o ^ 2)) = vv;
165 }
166