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 <machine/bus_pio.h>
56 #include <machine/bus_memio.h>
57 #include <sys/rman.h>
58
59 #include <isa/isavar.h>
60 #include "isa_if.h"
61
62 #include <dev/ic/hd64570.h>
63 #include <dev/ar/if_arregs.h>
64
65 #ifdef TRACE
66 #define TRC(x) x
67 #else
68 #define TRC(x)
69 #endif
70
71 #define TRCL(x) x
72
73 static int ar_isa_probe (device_t);
74 static int ar_isa_attach (device_t);
75
76 static struct isa_pnp_id ar_ids[] = {
77 {0, NULL}
78 };
79
80 static device_method_t ar_methods[] = {
81 DEVMETHOD(device_probe, ar_isa_probe),
82 DEVMETHOD(device_attach, ar_isa_attach),
83 DEVMETHOD(device_detach, ar_detach),
84 { 0, 0 }
85 };
86
87 static driver_t ar_isa_driver = {
88 "ar",
89 ar_methods,
90 sizeof (struct ar_hardc)
91 };
92
93 DRIVER_MODULE(ar, isa, ar_isa_driver, ar_devclass, 0, 0);
94 MODULE_DEPEND(ar, isa, 1, 1, 1);
95
96 /*
97 * Probe to see if it is there.
98 * Get its information and fill it in.
99 */
100 static int
101 ar_isa_probe(device_t device)
102 {
103 int error;
104 u_long membase, memsize;
105 struct ar_hardc *hc;
106
107 error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
108 if(error == ENXIO || error == 0)
109 return (error);
110
111 hc = (struct ar_hardc *)device_get_softc(device);
112
113 if((error = ar_allocate_ioport(device, 0, ARC_IO_SIZ))) {
114 return (ENXIO);
115 }
116
117 /*
118 * Now see if the card is realy there.
119 *
120 * XXX For now I just check the undocumented ports
121 * for "570". We will probably have to do more checking.
122 */
123 if((ar_inb(hc, AR_ID_5) != '5') ||
124 (ar_inb(hc, AR_ID_7) != '7') ||
125 (ar_inb(hc, AR_ID_0) != '')) {
126 ar_deallocate_resources(device);
127 return (ENXIO);
128 }
129 membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
130 memsize = ar_inb(hc, AR_REV);
131 memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
132 memsize *= ARC_WIN_SIZ;
133 error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
134 ar_deallocate_resources(device);
135
136 return (error);
137 }
138
139 /*
140 * Malloc memory for the softc structures.
141 * Reset the card to put it in a known state.
142 * Register the ports on the adapter.
143 * Fill in the info for each port.
144 * Attach each port to sppp and bpf.
145 */
146 static int
147 ar_isa_attach(device_t device)
148 {
149 u_int tmp;
150 u_long irq, junk;
151 struct ar_hardc *hc;
152
153 hc = (struct ar_hardc *)device_get_softc(device);
154 if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
155 return (ENXIO);
156
157 tmp = ar_inb(hc, AR_BMI);
158 hc->bustype = tmp & AR_BUS_MSK;
159 hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
160 hc->memsize = 1 << hc->memsize;
161 hc->memsize <<= 16;
162 hc->interface[0] = (tmp & AR_IFACE_MSK);
163 hc->interface[1] = hc->interface[0];
164 hc->interface[2] = hc->interface[0];
165 hc->interface[3] = hc->interface[0];
166 tmp = ar_inb(hc, AR_REV);
167 hc->revision = tmp & AR_REV_MSK;
168 hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
169 hc->winsize *= ARC_WIN_SIZ;
170 hc->winmsk = hc->winsize - 1;
171 hc->numports = ar_inb(hc, AR_PNUM);
172 hc->handshake = ar_inb(hc, AR_HNDSH);
173
174 if(ar_allocate_memory(device, 0, hc->winsize))
175 return (ENXIO);
176
177 hc->mem_start = rman_get_virtual(hc->res_memory);
178 hc->mem_end = hc->mem_start + hc->winsize;
179 hc->cunit = device_get_unit(device);
180
181 switch(hc->interface[0]) {
182 case AR_IFACE_EIA_232:
183 printf("ar%d: The EIA 232 interface is not supported.\n",
184 hc->cunit);
185 ar_deallocate_resources(device);
186 return (ENXIO);
187 case AR_IFACE_V_35:
188 break;
189 case AR_IFACE_EIA_530:
190 printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
191 hc->cunit);
192 break;
193 case AR_IFACE_X_21:
194 break;
195 case AR_IFACE_COMBO:
196 printf("ar%d: WARNING: The COMBO interface is untested.\n",
197 hc->cunit);
198 break;
199 }
200
201 /*
202 * Do a little sanity check.
203 */
204 if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
205 ar_deallocate_resources(device);
206 return (ENXIO);
207 }
208
209 if(ar_allocate_irq(device, 0, 1))
210 return (ENXIO);
211
212 if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
213 ar_deallocate_resources(device);
214 return (ENXIO);
215 }
216 hc->isa_irq = irq;
217
218 if(ar_attach(device)) {
219 ar_deallocate_resources(device);
220 return (ENXIO);
221 }
222
223 return (0);
224 }
225
226 /*
227 ********************************* END ************************************
228 */
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