1 /* $OpenBSD: flash.c,v 1.3 2003/06/02 18:40:59 jason Exp $ */
2
3 /*
4 * Copyright (c) 1999 Jason L. Wright (jason@thought.net)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * Driver for the flash memory found on FORCE CPU-5V boards.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/errno.h>
37 #include <sys/ioctl.h>
38 #include <sys/syslog.h>
39 #include <sys/device.h>
40 #include <sys/malloc.h>
41
42 #include <machine/autoconf.h>
43 #include <sparc/cpu.h>
44 #include <sparc/sparc/cpuvar.h>
45
46 int flashmatch(struct device *, void *, void *);
47 void flashattach(struct device *, struct device *, void *);
48
49 int flashopen(dev_t, int, int, struct proc *p);
50 int flashclose(dev_t, int, int, struct proc *p);
51 int flashread(dev_t, struct uio *, int);
52 int flashwrite(dev_t, struct uio *, int);
53 int flashrw(dev_t, struct uio *, int);
54 int flashioctl(dev_t, u_long, caddr_t, int, struct proc *);
55
56 /*
57 * We see the flash-memory in 512k windows. The current window is
58 * changed in the sysconfig registers (FMPCR1), see scf.c.
59 */
60 #define FLASH_REGS_SIZE 0x80000
61
62 struct flash_regs {
63 u_int8_t regs[0x80000];
64 };
65
66 struct flash_softc {
67 struct device sc_dv;
68 struct flash_regs *sc_regs;
69 int sc_node;
70 int sc_open;
71 };
72
73 struct cfattach flash_ca = {
74 sizeof (struct flash_softc), flashmatch, flashattach
75 };
76
77 struct cfdriver flash_cd = {
78 NULL, "flash", DV_IFNET
79 };
80
81 int
flashmatch(parent,vcf,aux)82 flashmatch(parent, vcf, aux)
83 struct device *parent;
84 void *vcf, *aux;
85 {
86 struct confargs *ca = aux;
87 register struct romaux *ra = &ca->ca_ra;
88
89 if (strcmp("flash-memory", ra->ra_name))
90 return (0);
91 return (1);
92 }
93
94 void
flashattach(parent,self,aux)95 flashattach(parent, self, aux)
96 struct device *parent, *self;
97 void *aux;
98 {
99 struct confargs *ca = aux;
100 struct flash_softc *sc = (struct flash_softc *)self;
101
102 /* map registers */
103 if (ca->ca_ra.ra_nreg != 1) {
104 printf(": expected 1 register, got %d\n", ca->ca_ra.ra_nreg);
105 return;
106 }
107 sc->sc_regs = mapiodev(&(ca->ca_ra.ra_reg[0]), 0,
108 ca->ca_ra.ra_reg[0].rr_len);
109
110 sc->sc_node = ca->ca_ra.ra_node;
111
112 printf(": window 0x%x\n", ca->ca_ra.ra_reg[0].rr_len);
113 }
114
115 int
flashopen(dev,flags,mode,p)116 flashopen(dev, flags, mode, p)
117 dev_t dev;
118 int flags;
119 int mode;
120 struct proc *p;
121 {
122 struct flash_softc *sc;
123 int card = 0;
124
125 if (card >= flash_cd.cd_ndevs)
126 return (ENXIO);
127 sc = flash_cd.cd_devs[card];
128 if (sc->sc_open)
129 return (EBUSY);
130 sc->sc_open = 1;
131 return (0);
132 }
133
134 int
flashclose(dev,flags,mode,p)135 flashclose(dev, flags, mode, p)
136 dev_t dev;
137 int flags;
138 int mode;
139 struct proc *p;
140 {
141 struct flash_softc *sc = flash_cd.cd_devs[0];
142 sc->sc_open = 0;
143 return (0);
144 }
145
146 int
flashwrite(dev,uio,flags)147 flashwrite(dev, uio, flags)
148 dev_t dev;
149 struct uio *uio;
150 int flags;
151 {
152 return (flashrw(dev, uio, flags));
153 }
154
155 int
flashread(dev,uio,flags)156 flashread(dev, uio, flags)
157 dev_t dev;
158 struct uio *uio;
159 int flags;
160 {
161 return (flashrw(dev, uio, flags));
162 }
163
164 int
flashrw(dev,uio,flags)165 flashrw(dev, uio, flags)
166 dev_t dev;
167 struct uio *uio;
168 int flags;
169 {
170 struct flash_softc *sc = flash_cd.cd_devs[0];
171 u_int cnt;
172 int off;
173
174 off = uio->uio_offset;
175 if (off >= FLASH_REGS_SIZE)
176 return (EFAULT);
177
178 cnt = uio->uio_resid;
179 if (cnt > (FLASH_REGS_SIZE - off))
180 cnt = FLASH_REGS_SIZE - off;
181
182 return (uiomove(&sc->sc_regs->regs[0] + off, cnt, uio));
183 }
184
185 int
flashioctl(dev,cmd,data,flags,p)186 flashioctl(dev, cmd, data, flags, p)
187 dev_t dev;
188 u_long cmd;
189 caddr_t data;
190 int flags;
191 struct proc *p;
192 {
193 return (EINVAL);
194 }
195