FreeBSD/Linux Kernel Cross Reference
sys/dev/ar/if_ar_isa.c
1 /*-
2 * Copyright (c) 1995 - 2001 John Hay. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the author nor the names of any co-contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY John Hay ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL John Hay BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 /*
33 * Programming assumptions and other issues.
34 *
35 * The descriptors of a DMA channel will fit in a 16K memory window.
36 *
37 * The buffers of a transmit DMA channel will fit in a 16K memory window.
38 *
39 * Only the ISA bus cards with X.21 and V.35 is tested.
40 *
41 * When interface is going up, handshaking is set and it is only cleared
42 * when the interface is down'ed.
43 *
44 * There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
45 * internal/external clock, etc.....
46 */
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
51 #include <sys/module.h>
52 #include <sys/bus.h>
53 #include <machine/bus.h>
54 #include <machine/resource.h>
55 #include <sys/rman.h>
56
57 #include <isa/isavar.h>
58 #include "isa_if.h"
59
60 #include <dev/ic/hd64570.h>
61 #include <dev/ar/if_arregs.h>
62
63 #ifdef TRACE
64 #define TRC(x) x
65 #else
66 #define TRC(x)
67 #endif
68
69 #define TRCL(x) x
70
71 static int ar_isa_probe (device_t);
72 static int ar_isa_attach (device_t);
73
74 static struct isa_pnp_id ar_ids[] = {
75 {0, NULL}
76 };
77
78 static device_method_t ar_methods[] = {
79 DEVMETHOD(device_probe, ar_isa_probe),
80 DEVMETHOD(device_attach, ar_isa_attach),
81 DEVMETHOD(device_detach, ar_detach),
82 { 0, 0 }
83 };
84
85 static driver_t ar_isa_driver = {
86 "ar",
87 ar_methods,
88 sizeof (struct ar_hardc)
89 };
90
91 DRIVER_MODULE(ar, isa, ar_isa_driver, ar_devclass, 0, 0);
92 MODULE_DEPEND(ar, isa, 1, 1, 1);
93
94 /*
95 * Probe to see if it is there.
96 * Get its information and fill it in.
97 */
98 static int
99 ar_isa_probe(device_t device)
100 {
101 int error;
102 u_long membase, memsize;
103 struct ar_hardc *hc;
104
105 error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
106 if(error == ENXIO || error == 0)
107 return (error);
108
109 hc = (struct ar_hardc *)device_get_softc(device);
110
111 if((error = ar_allocate_ioport(device, 0, ARC_IO_SIZ))) {
112 return (ENXIO);
113 }
114
115 /*
116 * Now see if the card is realy there.
117 *
118 * XXX For now I just check the undocumented ports
119 * for "570". We will probably have to do more checking.
120 */
121 if((ar_inb(hc, AR_ID_5) != '5') ||
122 (ar_inb(hc, AR_ID_7) != '7') ||
123 (ar_inb(hc, AR_ID_0) != '')) {
124 ar_deallocate_resources(device);
125 return (ENXIO);
126 }
127 membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
128 memsize = ar_inb(hc, AR_REV);
129 memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
130 memsize *= ARC_WIN_SIZ;
131 error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
132 ar_deallocate_resources(device);
133
134 return (error);
135 }
136
137 /*
138 * Malloc memory for the softc structures.
139 * Reset the card to put it in a known state.
140 * Register the ports on the adapter.
141 * Fill in the info for each port.
142 * Attach each port to sppp and bpf.
143 */
144 static int
145 ar_isa_attach(device_t device)
146 {
147 u_int tmp;
148 u_long irq, junk;
149 struct ar_hardc *hc;
150
151 hc = (struct ar_hardc *)device_get_softc(device);
152 if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
153 return (ENXIO);
154
155 tmp = ar_inb(hc, AR_BMI);
156 hc->bustype = tmp & AR_BUS_MSK;
157 hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
158 hc->memsize = 1 << hc->memsize;
159 hc->memsize <<= 16;
160 hc->interface[0] = (tmp & AR_IFACE_MSK);
161 hc->interface[1] = hc->interface[0];
162 hc->interface[2] = hc->interface[0];
163 hc->interface[3] = hc->interface[0];
164 tmp = ar_inb(hc, AR_REV);
165 hc->revision = tmp & AR_REV_MSK;
166 hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
167 hc->winsize *= ARC_WIN_SIZ;
168 hc->winmsk = hc->winsize - 1;
169 hc->numports = ar_inb(hc, AR_PNUM);
170 hc->handshake = ar_inb(hc, AR_HNDSH);
171
172 if(ar_allocate_memory(device, 0, hc->winsize))
173 return (ENXIO);
174
175 hc->mem_start = rman_get_virtual(hc->res_memory);
176 hc->mem_end = hc->mem_start + hc->winsize;
177 hc->cunit = device_get_unit(device);
178
179 switch(hc->interface[0]) {
180 case AR_IFACE_EIA_232:
181 printf("ar%d: The EIA 232 interface is not supported.\n",
182 hc->cunit);
183 ar_deallocate_resources(device);
184 return (ENXIO);
185 case AR_IFACE_V_35:
186 break;
187 case AR_IFACE_EIA_530:
188 printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
189 hc->cunit);
190 break;
191 case AR_IFACE_X_21:
192 break;
193 case AR_IFACE_COMBO:
194 printf("ar%d: WARNING: The COMBO interface is untested.\n",
195 hc->cunit);
196 break;
197 }
198
199 /*
200 * Do a little sanity check.
201 */
202 if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
203 ar_deallocate_resources(device);
204 return (ENXIO);
205 }
206
207 if(ar_allocate_irq(device, 0, 1))
208 return (ENXIO);
209
210 if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
211 ar_deallocate_resources(device);
212 return (ENXIO);
213 }
214 hc->isa_irq = irq;
215
216 if(ar_attach(device)) {
217 ar_deallocate_resources(device);
218 return (ENXIO);
219 }
220
221 return (0);
222 }
223
224 /*
225 ********************************* END ************************************
226 */
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