1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004-2005 M. Warner Losh <[email protected]>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/bio.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/lock.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/rman.h>
37 #include <sys/systm.h>
38
39 #include <machine/bus.h>
40
41 #include <dev/fdc/fdcvar.h>
42
43 #include <isa/isavar.h>
44 #include <isa/isareg.h>
45
46 static int fdc_isa_probe(device_t);
47
48 static struct isa_pnp_id fdc_ids[] = {
49 {0x0007d041, "PC standard floppy controller"}, /* PNP0700 */
50 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
51 {0}
52 };
53
54 /*
55 * On standard ISA, we don't just use an 8 port range
56 * (e.g. 0x3f0-0x3f7) since that covers an IDE control register at
57 * 0x3f6. So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7.
58 * However, some BIOSs omit the control port, while others start at
59 * 0x3f2. Of the latter, sometimes we have two resources, other times
60 * we have one. We have to deal with the following cases:
61 *
62 * 1: 0x3f0-0x3f5 # very rare
63 * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7
64 * 3: 0x3f0-0x3f5,0x3f7 # Most common
65 * 4: 0x3f2-0x3f5,0x3f7 # Second most common
66 * 5: 0x3f2-0x3f5 # implies 0x3f7 too.
67 * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common
68 * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare
69 * 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7
70 * 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7
71 *
72 * The following code is generic for any value of 0x3fx. It is also
73 * generic for all the above cases, as well as cases where things are
74 * even weirder.
75 */
76 int
fdc_isa_alloc_resources(device_t dev,struct fdc_data * fdc)77 fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc)
78 {
79 struct resource *res;
80 int i, j, rid, newrid, nport;
81 u_long port;
82
83 fdc->fdc_dev = dev;
84 rid = 0;
85 for (i = 0; i < FDC_MAXREG; i++)
86 fdc->resio[i] = NULL;
87
88 nport = isa_get_logicalid(dev) ? 1 : 6;
89 for (rid = 0; ; rid++) {
90 newrid = rid;
91 res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &newrid,
92 rid == 0 ? nport : 1, RF_ACTIVE);
93 if (res == NULL)
94 break;
95 /*
96 * Mask off the upper bits of the register, and sanity
97 * check resource ranges.
98 */
99 i = rman_get_start(res) & 0x7;
100 if (i + rman_get_size(res) - 1 > FDC_MAXREG) {
101 bus_release_resource(dev, SYS_RES_IOPORT, newrid, res);
102 return (ENXIO);
103 }
104 for (j = 0; j < rman_get_size(res); j++) {
105 fdc->resio[i + j] = res;
106 fdc->ridio[i + j] = newrid;
107 fdc->ioff[i + j] = j;
108 fdc->ioh[i + j] = rman_get_bushandle(res);
109 }
110 }
111 if (fdc->resio[2] == NULL) {
112 device_printf(dev, "No FDOUT register!\n");
113 return (ENXIO);
114 }
115 fdc->iot = rman_get_bustag(fdc->resio[2]);
116 if (fdc->resio[7] == NULL) {
117 port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7;
118 newrid = rid;
119 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port,
120 port, 1, RF_ACTIVE);
121 if (res == NULL) {
122 device_printf(dev, "Faking up FDCTL\n");
123 fdc->resio[7] = fdc->resio[2];
124 fdc->ridio[7] = fdc->ridio[2];
125 fdc->ioff[7] = fdc->ioff[2] + 5;
126 fdc->ioh[7] = fdc->ioh[2];
127 } else {
128 fdc->resio[7] = res;
129 fdc->ridio[7] = newrid;
130 fdc->ioff[7] = rman_get_start(res) & 7;
131 fdc->ioh[7] = rman_get_bushandle(res);
132 }
133 }
134
135 fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq,
136 RF_ACTIVE | RF_SHAREABLE);
137 if (fdc->res_irq == NULL) {
138 device_printf(dev, "cannot reserve interrupt line\n");
139 return (ENXIO);
140 }
141
142 if ((fdc->flags & FDC_NODMA) == 0) {
143 fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
144 &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE);
145 if (fdc->res_drq == NULL) {
146 device_printf(dev, "cannot reserve DMA request line\n");
147 /* This is broken and doesn't work for ISA case */
148 fdc->flags |= FDC_NODMA;
149 } else
150 fdc->dmachan = rman_get_start(fdc->res_drq);
151 }
152
153 return (0);
154 }
155
156 static int
fdc_isa_probe(device_t dev)157 fdc_isa_probe(device_t dev)
158 {
159 int error;
160 struct fdc_data *fdc;
161
162 fdc = device_get_softc(dev);
163 fdc->fdc_dev = dev;
164
165 /* Check pnp ids */
166 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
167 if (error == ENXIO)
168 return (ENXIO);
169
170 /* Attempt to allocate our resources for the duration of the probe */
171 error = fdc_isa_alloc_resources(dev, fdc);
172 if (error == 0)
173 error = fdc_initial_reset(dev, fdc);
174
175 fdc_release_resources(fdc);
176 return (error);
177 }
178
179 static int
fdc_isa_attach(device_t dev)180 fdc_isa_attach(device_t dev)
181 {
182 struct fdc_data *fdc;
183 int error;
184
185 fdc = device_get_softc(dev);
186 fdc->fdc_dev = dev;
187 error = fdc_isa_alloc_resources(dev, fdc);
188 if (error == 0)
189 error = fdc_attach(dev);
190 if (error == 0)
191 error = fdc_hints_probe(dev);
192 if (error == 0)
193 fdc_start_worker(dev);
194 else
195 fdc_release_resources(fdc);
196 return (error);
197 }
198
199 static device_method_t fdc_methods[] = {
200 /* Device interface */
201 DEVMETHOD(device_probe, fdc_isa_probe),
202 DEVMETHOD(device_attach, fdc_isa_attach),
203 DEVMETHOD(device_detach, fdc_detach),
204 DEVMETHOD(device_shutdown, bus_generic_shutdown),
205 DEVMETHOD(device_suspend, bus_generic_suspend),
206 DEVMETHOD(device_resume, bus_generic_resume),
207
208 /* Bus interface */
209 DEVMETHOD(bus_print_child, fdc_print_child),
210 DEVMETHOD(bus_read_ivar, fdc_read_ivar),
211 DEVMETHOD(bus_write_ivar, fdc_write_ivar),
212 /* Our children never use any other bus interface methods. */
213
214 { 0, 0 }
215 };
216
217 static driver_t fdc_driver = {
218 "fdc",
219 fdc_methods,
220 sizeof(struct fdc_data)
221 };
222
223 DRIVER_MODULE(fdc, isa, fdc_driver, 0, 0);
224 ISA_PNP_INFO(fdc_ids);
225