1/*-
2 * Copyright (c) 2004-2006 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
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 ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2004-2006 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
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 ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
|
28__FBSDID("$FreeBSD: head/sys/dev/scc/scc_core.c 294883 2016-01-27 02:23:54Z jhibbits $");
| 28__FBSDID("$FreeBSD: head/sys/dev/scc/scc_core.c 296137 2016-02-27 03:38:01Z jhibbits $");
|
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/conf.h>
34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/queue.h>
37#include <sys/serial.h>
38
39#include <machine/bus.h>
40#include <machine/resource.h>
41#include <sys/rman.h>
42
43#include <dev/scc/scc_bfe.h>
44#include <dev/scc/scc_bus.h>
45
46#include "scc_if.h"
47
48devclass_t scc_devclass;
49const char scc_driver_name[] = "scc";
50
51static MALLOC_DEFINE(M_SCC, "SCC", "SCC driver");
52
53static int
54scc_bfe_intr(void *arg)
55{
56 struct scc_softc *sc = arg;
57 struct scc_chan *ch;
58 struct scc_class *cl;
59 struct scc_mode *m;
60 int c, i, ipend, isrc;
61
62 cl = sc->sc_class;
63 while (!sc->sc_leaving && (ipend = SCC_IPEND(sc)) != 0) {
64 i = 0, isrc = SER_INT_OVERRUN;
65 while (ipend) {
66 while (i < SCC_ISRCCNT && !(ipend & isrc))
67 i++, isrc <<= 1;
68 KASSERT(i < SCC_ISRCCNT, ("%s", __func__));
69 ipend &= ~isrc;
70 for (c = 0; c < cl->cl_channels; c++) {
71 ch = &sc->sc_chan[c];
72 if (!(ch->ch_ipend & isrc))
73 continue;
74 m = &ch->ch_mode[0];
75 if (m->ih_src[i] == NULL)
76 continue;
77 if ((*m->ih_src[i])(m->ih_arg))
78 ch->ch_ipend &= ~isrc;
79 }
80 }
81 for (c = 0; c < cl->cl_channels; c++) {
82 ch = &sc->sc_chan[c];
83 if (!ch->ch_ipend)
84 continue;
85 m = &ch->ch_mode[0];
86 if (m->ih != NULL)
87 (*m->ih)(m->ih_arg);
88 else
89 SCC_ICLEAR(sc, ch);
90 }
91 return (FILTER_HANDLED);
92 }
93 return (FILTER_STRAY);
94}
95
96int
97scc_bfe_attach(device_t dev, u_int ipc)
98{
99 struct resource_list_entry *rle;
100 struct scc_chan *ch;
101 struct scc_class *cl;
102 struct scc_mode *m;
103 struct scc_softc *sc, *sc0;
104 const char *sep;
105 bus_space_handle_t bh;
106 rman_res_t base, size, start, sz;
107 int c, error, mode, sysdev;
108
109 /*
110 * The sc_class field defines the type of SCC we're going to work
111 * with and thus the size of the softc. Replace the generic softc
112 * with one that matches the SCC now that we're certain we handle
113 * the device.
114 */
115 sc0 = device_get_softc(dev);
116 cl = sc0->sc_class;
117 if (cl->size > sizeof(*sc)) {
118 sc = malloc(cl->size, M_SCC, M_WAITOK|M_ZERO);
119 bcopy(sc0, sc, sizeof(*sc));
120 device_set_softc(dev, sc);
121 } else
122 sc = sc0;
123
124 size = abs(cl->cl_range) << sc->sc_bas.regshft;
125
126 mtx_init(&sc->sc_hwmtx, "scc_hwmtx", NULL, MTX_SPIN);
127
128 /*
129 * Re-allocate. We expect that the softc contains the information
130 * collected by scc_bfe_probe() intact.
131 */
| 29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/conf.h>
34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/queue.h>
37#include <sys/serial.h>
38
39#include <machine/bus.h>
40#include <machine/resource.h>
41#include <sys/rman.h>
42
43#include <dev/scc/scc_bfe.h>
44#include <dev/scc/scc_bus.h>
45
46#include "scc_if.h"
47
48devclass_t scc_devclass;
49const char scc_driver_name[] = "scc";
50
51static MALLOC_DEFINE(M_SCC, "SCC", "SCC driver");
52
53static int
54scc_bfe_intr(void *arg)
55{
56 struct scc_softc *sc = arg;
57 struct scc_chan *ch;
58 struct scc_class *cl;
59 struct scc_mode *m;
60 int c, i, ipend, isrc;
61
62 cl = sc->sc_class;
63 while (!sc->sc_leaving && (ipend = SCC_IPEND(sc)) != 0) {
64 i = 0, isrc = SER_INT_OVERRUN;
65 while (ipend) {
66 while (i < SCC_ISRCCNT && !(ipend & isrc))
67 i++, isrc <<= 1;
68 KASSERT(i < SCC_ISRCCNT, ("%s", __func__));
69 ipend &= ~isrc;
70 for (c = 0; c < cl->cl_channels; c++) {
71 ch = &sc->sc_chan[c];
72 if (!(ch->ch_ipend & isrc))
73 continue;
74 m = &ch->ch_mode[0];
75 if (m->ih_src[i] == NULL)
76 continue;
77 if ((*m->ih_src[i])(m->ih_arg))
78 ch->ch_ipend &= ~isrc;
79 }
80 }
81 for (c = 0; c < cl->cl_channels; c++) {
82 ch = &sc->sc_chan[c];
83 if (!ch->ch_ipend)
84 continue;
85 m = &ch->ch_mode[0];
86 if (m->ih != NULL)
87 (*m->ih)(m->ih_arg);
88 else
89 SCC_ICLEAR(sc, ch);
90 }
91 return (FILTER_HANDLED);
92 }
93 return (FILTER_STRAY);
94}
95
96int
97scc_bfe_attach(device_t dev, u_int ipc)
98{
99 struct resource_list_entry *rle;
100 struct scc_chan *ch;
101 struct scc_class *cl;
102 struct scc_mode *m;
103 struct scc_softc *sc, *sc0;
104 const char *sep;
105 bus_space_handle_t bh;
106 rman_res_t base, size, start, sz;
107 int c, error, mode, sysdev;
108
109 /*
110 * The sc_class field defines the type of SCC we're going to work
111 * with and thus the size of the softc. Replace the generic softc
112 * with one that matches the SCC now that we're certain we handle
113 * the device.
114 */
115 sc0 = device_get_softc(dev);
116 cl = sc0->sc_class;
117 if (cl->size > sizeof(*sc)) {
118 sc = malloc(cl->size, M_SCC, M_WAITOK|M_ZERO);
119 bcopy(sc0, sc, sizeof(*sc));
120 device_set_softc(dev, sc);
121 } else
122 sc = sc0;
123
124 size = abs(cl->cl_range) << sc->sc_bas.regshft;
125
126 mtx_init(&sc->sc_hwmtx, "scc_hwmtx", NULL, MTX_SPIN);
127
128 /*
129 * Re-allocate. We expect that the softc contains the information
130 * collected by scc_bfe_probe() intact.
131 */
|
132 sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype, &sc->sc_rrid,
133 0, ~0, cl->cl_channels * size, RF_ACTIVE);
| 132 sc->sc_rres = bus_alloc_resource_anywhere(dev, sc->sc_rtype,
133 &sc->sc_rrid, cl->cl_channels * size, RF_ACTIVE);
|
134 if (sc->sc_rres == NULL)
135 return (ENXIO);
136 sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
137 sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
138
139 /*
140 * Allocate interrupt resources. There may be a different interrupt
141 * per channel. We allocate them all...
142 */
143 sc->sc_chan = malloc(sizeof(struct scc_chan) * cl->cl_channels,
144 M_SCC, M_WAITOK | M_ZERO);
145 for (c = 0; c < cl->cl_channels; c++) {
146 ch = &sc->sc_chan[c];
147 /*
148 * XXX temporary hack. If we have more than 1 interrupt
149 * per channel, allocate the first for the channel. At
150 * this time only the macio bus front-end has more than
151 * 1 interrupt per channel and we don't use the 2nd and
152 * 3rd, because we don't support DMA yet.
153 */
154 ch->ch_irid = c * ipc;
155 ch->ch_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
156 &ch->ch_irid, RF_ACTIVE | RF_SHAREABLE);
157 if (ipc == 0)
158 break;
159 }
160
161 /*
162 * Create the control structures for our children. Probe devices
163 * and query them to see if we can reset the hardware.
164 */
165 sysdev = 0;
166 base = rman_get_start(sc->sc_rres);
167 sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
168 start = base + ((cl->cl_range < 0) ? size * (cl->cl_channels - 1) : 0);
169 for (c = 0; c < cl->cl_channels; c++) {
170 ch = &sc->sc_chan[c];
171 resource_list_init(&ch->ch_rlist);
172 ch->ch_nr = c + 1;
173
174 if (!SCC_ENABLED(sc, ch))
175 goto next;
176
177 ch->ch_enabled = 1;
178 resource_list_add(&ch->ch_rlist, sc->sc_rtype, 0, start,
179 start + sz - 1, sz);
180 rle = resource_list_find(&ch->ch_rlist, sc->sc_rtype, 0);
181 rle->res = &ch->ch_rres;
182 bus_space_subregion(rman_get_bustag(sc->sc_rres),
183 rman_get_bushandle(sc->sc_rres), start - base, sz, &bh);
184 rman_set_bushandle(rle->res, bh);
185 rman_set_bustag(rle->res, rman_get_bustag(sc->sc_rres));
186
187 resource_list_add(&ch->ch_rlist, SYS_RES_IRQ, 0, c, c, 1);
188 rle = resource_list_find(&ch->ch_rlist, SYS_RES_IRQ, 0);
189 rle->res = (ch->ch_ires != NULL) ? ch->ch_ires :
190 sc->sc_chan[0].ch_ires;
191
192 for (mode = 0; mode < SCC_NMODES; mode++) {
193 m = &ch->ch_mode[mode];
194 m->m_chan = ch;
195 m->m_mode = 1U << mode;
196 if ((cl->cl_modes & m->m_mode) == 0 || ch->ch_sysdev)
197 continue;
198 m->m_dev = device_add_child(dev, NULL, -1);
199 device_set_ivars(m->m_dev, (void *)m);
200 error = device_probe_child(dev, m->m_dev);
201 if (!error) {
202 m->m_probed = 1;
203 m->m_sysdev = SERDEV_SYSDEV(m->m_dev) ? 1 : 0;
204 ch->ch_sysdev |= m->m_sysdev;
205 }
206 }
207
208 next:
209 start += (cl->cl_range < 0) ? -size : size;
210 sysdev |= ch->ch_sysdev;
211 }
212
213 /*
214 * Have the hardware driver initialize the hardware. Tell it
215 * whether or not a hardware reset should be performed.
216 */
217 if (bootverbose) {
218 device_printf(dev, "%sresetting hardware\n",
219 (sysdev) ? "not " : "");
220 }
221 error = SCC_ATTACH(sc, !sysdev);
222 if (error)
223 goto fail;
224
225 /*
226 * Setup our interrupt handler. Make it FAST under the assumption
227 * that our children's are fast as well. We make it MPSAFE as soon
228 * as a child sets up a MPSAFE interrupt handler.
229 * Of course, if we can't setup a fast handler, we make it MPSAFE
230 * right away.
231 */
232 for (c = 0; c < cl->cl_channels; c++) {
233 ch = &sc->sc_chan[c];
234 if (ch->ch_ires == NULL)
235 continue;
236 error = bus_setup_intr(dev, ch->ch_ires,
237 INTR_TYPE_TTY, scc_bfe_intr, NULL, sc,
238 &ch->ch_icookie);
239 if (error) {
240 error = bus_setup_intr(dev, ch->ch_ires,
241 INTR_TYPE_TTY | INTR_MPSAFE, NULL,
242 (driver_intr_t *)scc_bfe_intr, sc, &ch->ch_icookie);
243 } else
244 sc->sc_fastintr = 1;
245
246 if (error) {
247 device_printf(dev, "could not activate interrupt\n");
248 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
249 ch->ch_ires);
250 ch->ch_ires = NULL;
251 }
252 }
253 sc->sc_polled = 1;
254 for (c = 0; c < cl->cl_channels; c++) {
255 if (sc->sc_chan[0].ch_ires != NULL)
256 sc->sc_polled = 0;
257 }
258
259 /*
260 * Attach all child devices that were probed successfully.
261 */
262 for (c = 0; c < cl->cl_channels; c++) {
263 ch = &sc->sc_chan[c];
264 for (mode = 0; mode < SCC_NMODES; mode++) {
265 m = &ch->ch_mode[mode];
266 if (!m->m_probed)
267 continue;
268 error = device_attach(m->m_dev);
269 if (error)
270 continue;
271 m->m_attached = 1;
272 }
273 }
274
275 if (bootverbose && (sc->sc_fastintr || sc->sc_polled)) {
276 sep = "";
277 device_print_prettyname(dev);
278 if (sc->sc_fastintr) {
279 printf("%sfast interrupt", sep);
280 sep = ", ";
281 }
282 if (sc->sc_polled) {
283 printf("%spolled mode", sep);
284 sep = ", ";
285 }
286 printf("\n");
287 }
288
289 return (0);
290
291 fail:
292 for (c = 0; c < cl->cl_channels; c++) {
293 ch = &sc->sc_chan[c];
294 if (ch->ch_ires == NULL)
295 continue;
296 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
297 ch->ch_ires);
298 }
299 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
300 return (error);
301}
302
303int
304scc_bfe_detach(device_t dev)
305{
306 struct scc_chan *ch;
307 struct scc_class *cl;
308 struct scc_mode *m;
309 struct scc_softc *sc;
310 int chan, error, mode;
311
312 sc = device_get_softc(dev);
313 cl = sc->sc_class;
314
315 /* Detach our children. */
316 error = 0;
317 for (chan = 0; chan < cl->cl_channels; chan++) {
318 ch = &sc->sc_chan[chan];
319 for (mode = 0; mode < SCC_NMODES; mode++) {
320 m = &ch->ch_mode[mode];
321 if (!m->m_attached)
322 continue;
323 if (device_detach(m->m_dev) != 0)
324 error = ENXIO;
325 else
326 m->m_attached = 0;
327 }
328 }
329
330 if (error)
331 return (error);
332
333 for (chan = 0; chan < cl->cl_channels; chan++) {
334 ch = &sc->sc_chan[chan];
335 if (ch->ch_ires == NULL)
336 continue;
337 bus_teardown_intr(dev, ch->ch_ires, ch->ch_icookie);
338 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
339 ch->ch_ires);
340 }
341 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
342
343 free(sc->sc_chan, M_SCC);
344
345 mtx_destroy(&sc->sc_hwmtx);
346 return (0);
347}
348
349int
350scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid)
351{
352 struct scc_softc *sc;
353 struct scc_class *cl;
354 u_long size, sz;
355 int error;
356
357 /*
358 * Initialize the instance. Note that the instance (=softc) does
359 * not necessarily match the hardware specific softc. We can't do
360 * anything about it now, because we may not attach to the device.
361 * Hardware drivers cannot use any of the class specific fields
362 * while probing.
363 */
364 sc = device_get_softc(dev);
365 cl = sc->sc_class;
366 kobj_init((kobj_t)sc, (kobj_class_t)cl);
367 sc->sc_dev = dev;
368 if (device_get_desc(dev) == NULL)
369 device_set_desc(dev, cl->name);
370
371 size = abs(cl->cl_range) << regshft;
372
373 /*
374 * Allocate the register resource. We assume that all SCCs have a
375 * single register window in either I/O port space or memory mapped
376 * I/O space. Any SCC that needs multiple windows will consequently
377 * not be supported by this driver as-is.
378 */
379 sc->sc_rrid = rid;
380 sc->sc_rtype = SYS_RES_MEMORY;
| 134 if (sc->sc_rres == NULL)
135 return (ENXIO);
136 sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
137 sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
138
139 /*
140 * Allocate interrupt resources. There may be a different interrupt
141 * per channel. We allocate them all...
142 */
143 sc->sc_chan = malloc(sizeof(struct scc_chan) * cl->cl_channels,
144 M_SCC, M_WAITOK | M_ZERO);
145 for (c = 0; c < cl->cl_channels; c++) {
146 ch = &sc->sc_chan[c];
147 /*
148 * XXX temporary hack. If we have more than 1 interrupt
149 * per channel, allocate the first for the channel. At
150 * this time only the macio bus front-end has more than
151 * 1 interrupt per channel and we don't use the 2nd and
152 * 3rd, because we don't support DMA yet.
153 */
154 ch->ch_irid = c * ipc;
155 ch->ch_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
156 &ch->ch_irid, RF_ACTIVE | RF_SHAREABLE);
157 if (ipc == 0)
158 break;
159 }
160
161 /*
162 * Create the control structures for our children. Probe devices
163 * and query them to see if we can reset the hardware.
164 */
165 sysdev = 0;
166 base = rman_get_start(sc->sc_rres);
167 sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
168 start = base + ((cl->cl_range < 0) ? size * (cl->cl_channels - 1) : 0);
169 for (c = 0; c < cl->cl_channels; c++) {
170 ch = &sc->sc_chan[c];
171 resource_list_init(&ch->ch_rlist);
172 ch->ch_nr = c + 1;
173
174 if (!SCC_ENABLED(sc, ch))
175 goto next;
176
177 ch->ch_enabled = 1;
178 resource_list_add(&ch->ch_rlist, sc->sc_rtype, 0, start,
179 start + sz - 1, sz);
180 rle = resource_list_find(&ch->ch_rlist, sc->sc_rtype, 0);
181 rle->res = &ch->ch_rres;
182 bus_space_subregion(rman_get_bustag(sc->sc_rres),
183 rman_get_bushandle(sc->sc_rres), start - base, sz, &bh);
184 rman_set_bushandle(rle->res, bh);
185 rman_set_bustag(rle->res, rman_get_bustag(sc->sc_rres));
186
187 resource_list_add(&ch->ch_rlist, SYS_RES_IRQ, 0, c, c, 1);
188 rle = resource_list_find(&ch->ch_rlist, SYS_RES_IRQ, 0);
189 rle->res = (ch->ch_ires != NULL) ? ch->ch_ires :
190 sc->sc_chan[0].ch_ires;
191
192 for (mode = 0; mode < SCC_NMODES; mode++) {
193 m = &ch->ch_mode[mode];
194 m->m_chan = ch;
195 m->m_mode = 1U << mode;
196 if ((cl->cl_modes & m->m_mode) == 0 || ch->ch_sysdev)
197 continue;
198 m->m_dev = device_add_child(dev, NULL, -1);
199 device_set_ivars(m->m_dev, (void *)m);
200 error = device_probe_child(dev, m->m_dev);
201 if (!error) {
202 m->m_probed = 1;
203 m->m_sysdev = SERDEV_SYSDEV(m->m_dev) ? 1 : 0;
204 ch->ch_sysdev |= m->m_sysdev;
205 }
206 }
207
208 next:
209 start += (cl->cl_range < 0) ? -size : size;
210 sysdev |= ch->ch_sysdev;
211 }
212
213 /*
214 * Have the hardware driver initialize the hardware. Tell it
215 * whether or not a hardware reset should be performed.
216 */
217 if (bootverbose) {
218 device_printf(dev, "%sresetting hardware\n",
219 (sysdev) ? "not " : "");
220 }
221 error = SCC_ATTACH(sc, !sysdev);
222 if (error)
223 goto fail;
224
225 /*
226 * Setup our interrupt handler. Make it FAST under the assumption
227 * that our children's are fast as well. We make it MPSAFE as soon
228 * as a child sets up a MPSAFE interrupt handler.
229 * Of course, if we can't setup a fast handler, we make it MPSAFE
230 * right away.
231 */
232 for (c = 0; c < cl->cl_channels; c++) {
233 ch = &sc->sc_chan[c];
234 if (ch->ch_ires == NULL)
235 continue;
236 error = bus_setup_intr(dev, ch->ch_ires,
237 INTR_TYPE_TTY, scc_bfe_intr, NULL, sc,
238 &ch->ch_icookie);
239 if (error) {
240 error = bus_setup_intr(dev, ch->ch_ires,
241 INTR_TYPE_TTY | INTR_MPSAFE, NULL,
242 (driver_intr_t *)scc_bfe_intr, sc, &ch->ch_icookie);
243 } else
244 sc->sc_fastintr = 1;
245
246 if (error) {
247 device_printf(dev, "could not activate interrupt\n");
248 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
249 ch->ch_ires);
250 ch->ch_ires = NULL;
251 }
252 }
253 sc->sc_polled = 1;
254 for (c = 0; c < cl->cl_channels; c++) {
255 if (sc->sc_chan[0].ch_ires != NULL)
256 sc->sc_polled = 0;
257 }
258
259 /*
260 * Attach all child devices that were probed successfully.
261 */
262 for (c = 0; c < cl->cl_channels; c++) {
263 ch = &sc->sc_chan[c];
264 for (mode = 0; mode < SCC_NMODES; mode++) {
265 m = &ch->ch_mode[mode];
266 if (!m->m_probed)
267 continue;
268 error = device_attach(m->m_dev);
269 if (error)
270 continue;
271 m->m_attached = 1;
272 }
273 }
274
275 if (bootverbose && (sc->sc_fastintr || sc->sc_polled)) {
276 sep = "";
277 device_print_prettyname(dev);
278 if (sc->sc_fastintr) {
279 printf("%sfast interrupt", sep);
280 sep = ", ";
281 }
282 if (sc->sc_polled) {
283 printf("%spolled mode", sep);
284 sep = ", ";
285 }
286 printf("\n");
287 }
288
289 return (0);
290
291 fail:
292 for (c = 0; c < cl->cl_channels; c++) {
293 ch = &sc->sc_chan[c];
294 if (ch->ch_ires == NULL)
295 continue;
296 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
297 ch->ch_ires);
298 }
299 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
300 return (error);
301}
302
303int
304scc_bfe_detach(device_t dev)
305{
306 struct scc_chan *ch;
307 struct scc_class *cl;
308 struct scc_mode *m;
309 struct scc_softc *sc;
310 int chan, error, mode;
311
312 sc = device_get_softc(dev);
313 cl = sc->sc_class;
314
315 /* Detach our children. */
316 error = 0;
317 for (chan = 0; chan < cl->cl_channels; chan++) {
318 ch = &sc->sc_chan[chan];
319 for (mode = 0; mode < SCC_NMODES; mode++) {
320 m = &ch->ch_mode[mode];
321 if (!m->m_attached)
322 continue;
323 if (device_detach(m->m_dev) != 0)
324 error = ENXIO;
325 else
326 m->m_attached = 0;
327 }
328 }
329
330 if (error)
331 return (error);
332
333 for (chan = 0; chan < cl->cl_channels; chan++) {
334 ch = &sc->sc_chan[chan];
335 if (ch->ch_ires == NULL)
336 continue;
337 bus_teardown_intr(dev, ch->ch_ires, ch->ch_icookie);
338 bus_release_resource(dev, SYS_RES_IRQ, ch->ch_irid,
339 ch->ch_ires);
340 }
341 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
342
343 free(sc->sc_chan, M_SCC);
344
345 mtx_destroy(&sc->sc_hwmtx);
346 return (0);
347}
348
349int
350scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid)
351{
352 struct scc_softc *sc;
353 struct scc_class *cl;
354 u_long size, sz;
355 int error;
356
357 /*
358 * Initialize the instance. Note that the instance (=softc) does
359 * not necessarily match the hardware specific softc. We can't do
360 * anything about it now, because we may not attach to the device.
361 * Hardware drivers cannot use any of the class specific fields
362 * while probing.
363 */
364 sc = device_get_softc(dev);
365 cl = sc->sc_class;
366 kobj_init((kobj_t)sc, (kobj_class_t)cl);
367 sc->sc_dev = dev;
368 if (device_get_desc(dev) == NULL)
369 device_set_desc(dev, cl->name);
370
371 size = abs(cl->cl_range) << regshft;
372
373 /*
374 * Allocate the register resource. We assume that all SCCs have a
375 * single register window in either I/O port space or memory mapped
376 * I/O space. Any SCC that needs multiple windows will consequently
377 * not be supported by this driver as-is.
378 */
379 sc->sc_rrid = rid;
380 sc->sc_rtype = SYS_RES_MEMORY;
|
381 sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype, &sc->sc_rrid,
382 0, ~0, cl->cl_channels * size, RF_ACTIVE);
| 381 sc->sc_rres = bus_alloc_resource_anywhere(dev, sc->sc_rtype,
382 &sc->sc_rrid, cl->cl_channels * size, RF_ACTIVE);
|
383 if (sc->sc_rres == NULL) {
384 sc->sc_rrid = rid;
385 sc->sc_rtype = SYS_RES_IOPORT;
| 383 if (sc->sc_rres == NULL) {
384 sc->sc_rrid = rid;
385 sc->sc_rtype = SYS_RES_IOPORT;
|
386 sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype,
387 &sc->sc_rrid, 0, ~0, cl->cl_channels * size, RF_ACTIVE);
| 386 sc->sc_rres = bus_alloc_resource_anywhere(dev, sc->sc_rtype,
387 &sc->sc_rrid, cl->cl_channels * size, RF_ACTIVE);
|
388 if (sc->sc_rres == NULL)
389 return (ENXIO);
390 }
391
392 /*
393 * Fill in the bus access structure and call the hardware specific
394 * probe method.
395 */
396 sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
397 sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
398 sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
399 sc->sc_bas.range = sz;
400 sc->sc_bas.rclk = rclk;
401 sc->sc_bas.regshft = regshft;
402
403 error = SCC_PROBE(sc);
404 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
405 return ((error == 0) ? BUS_PROBE_DEFAULT : error);
406}
407
408struct resource *
409scc_bus_alloc_resource(device_t dev, device_t child, int type, int *rid,
410 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
411{
412 struct resource_list_entry *rle;
413 struct scc_chan *ch;
414 struct scc_mode *m;
415
416 if (device_get_parent(child) != dev)
417 return (NULL);
418
419 /* We only support default allocations. */
420 if (start != 0UL || end != ~0UL)
421 return (NULL);
422
423 m = device_get_ivars(child);
424 ch = m->m_chan;
425 rle = resource_list_find(&ch->ch_rlist, type, 0);
426 if (rle == NULL)
427 return (NULL);
428 *rid = 0;
429 return (rle->res);
430}
431
432int
433scc_bus_get_resource(device_t dev, device_t child, int type, int rid,
434 rman_res_t *startp, rman_res_t *countp)
435{
436 struct resource_list_entry *rle;
437 struct scc_chan *ch;
438 struct scc_mode *m;
439
440 if (device_get_parent(child) != dev)
441 return (EINVAL);
442
443 m = device_get_ivars(child);
444 ch = m->m_chan;
445 rle = resource_list_find(&ch->ch_rlist, type, rid);
446 if (rle == NULL)
447 return (EINVAL);
448
449 if (startp != NULL)
450 *startp = rle->start;
451 if (countp != NULL)
452 *countp = rle->count;
453 return (0);
454}
455
456int
457scc_bus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
458{
459 struct scc_chan *ch;
460 struct scc_class *cl;
461 struct scc_mode *m;
462 struct scc_softc *sc;
463
464 if (device_get_parent(child) != dev)
465 return (EINVAL);
466
467 sc = device_get_softc(dev);
468 cl = sc->sc_class;
469 m = device_get_ivars(child);
470 ch = m->m_chan;
471
472 switch (index) {
473 case SCC_IVAR_CHANNEL:
474 *result = ch->ch_nr;
475 break;
476 case SCC_IVAR_CLASS:
477 *result = cl->cl_class;
478 break;
479 case SCC_IVAR_CLOCK:
480 *result = sc->sc_bas.rclk;
481 break;
482 case SCC_IVAR_MODE:
483 *result = m->m_mode;
484 break;
485 case SCC_IVAR_REGSHFT:
486 *result = sc->sc_bas.regshft;
487 break;
488 case SCC_IVAR_HWMTX:
489 *result = (uintptr_t)&sc->sc_hwmtx;
490 break;
491 default:
492 return (EINVAL);
493 }
494 return (0);
495}
496
497int
498scc_bus_release_resource(device_t dev, device_t child, int type, int rid,
499 struct resource *res)
500{
501 struct resource_list_entry *rle;
502 struct scc_chan *ch;
503 struct scc_mode *m;
504
505 if (device_get_parent(child) != dev)
506 return (EINVAL);
507
508 m = device_get_ivars(child);
509 ch = m->m_chan;
510 rle = resource_list_find(&ch->ch_rlist, type, rid);
511 return ((rle == NULL) ? EINVAL : 0);
512}
513
514int
515scc_bus_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
516 driver_filter_t *filt, void (*ihand)(void *), void *arg, void **cookiep)
517{
518 struct scc_chan *ch;
519 struct scc_mode *m;
520 struct scc_softc *sc;
521 int c, i, isrc;
522
523 if (device_get_parent(child) != dev)
524 return (EINVAL);
525
526 /* Interrupt handlers must be FAST or MPSAFE. */
527 if (filt == NULL && !(flags & INTR_MPSAFE))
528 return (EINVAL);
529
530 sc = device_get_softc(dev);
531 if (sc->sc_polled)
532 return (ENXIO);
533
534 if (sc->sc_fastintr && filt == NULL) {
535 sc->sc_fastintr = 0;
536 for (c = 0; c < sc->sc_class->cl_channels; c++) {
537 ch = &sc->sc_chan[c];
538 if (ch->ch_ires == NULL)
539 continue;
540 bus_teardown_intr(dev, ch->ch_ires, ch->ch_icookie);
541 bus_setup_intr(dev, ch->ch_ires,
542 INTR_TYPE_TTY | INTR_MPSAFE, NULL,
543 (driver_intr_t *)scc_bfe_intr, sc, &ch->ch_icookie);
544 }
545 }
546
547 m = device_get_ivars(child);
548 m->m_hasintr = 1;
549 m->m_fastintr = (filt != NULL) ? 1 : 0;
550 m->ih = (filt != NULL) ? filt : (driver_filter_t *)ihand;
551 m->ih_arg = arg;
552
553 i = 0, isrc = SER_INT_OVERRUN;
554 while (i < SCC_ISRCCNT) {
555 m->ih_src[i] = SERDEV_IHAND(child, isrc);
556 if (m->ih_src[i] != NULL)
557 m->ih = NULL;
558 i++, isrc <<= 1;
559 }
560 return (0);
561}
562
563int
564scc_bus_teardown_intr(device_t dev, device_t child, struct resource *r,
565 void *cookie)
566{
567 struct scc_mode *m;
568 int i;
569
570 if (device_get_parent(child) != dev)
571 return (EINVAL);
572
573 m = device_get_ivars(child);
574 if (!m->m_hasintr)
575 return (EINVAL);
576
577 m->m_hasintr = 0;
578 m->m_fastintr = 0;
579 m->ih = NULL;
580 m->ih_arg = NULL;
581 for (i = 0; i < SCC_ISRCCNT; i++)
582 m->ih_src[i] = NULL;
583 return (0);
584}
| 388 if (sc->sc_rres == NULL)
389 return (ENXIO);
390 }
391
392 /*
393 * Fill in the bus access structure and call the hardware specific
394 * probe method.
395 */
396 sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
397 sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
398 sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
399 sc->sc_bas.range = sz;
400 sc->sc_bas.rclk = rclk;
401 sc->sc_bas.regshft = regshft;
402
403 error = SCC_PROBE(sc);
404 bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
405 return ((error == 0) ? BUS_PROBE_DEFAULT : error);
406}
407
408struct resource *
409scc_bus_alloc_resource(device_t dev, device_t child, int type, int *rid,
410 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
411{
412 struct resource_list_entry *rle;
413 struct scc_chan *ch;
414 struct scc_mode *m;
415
416 if (device_get_parent(child) != dev)
417 return (NULL);
418
419 /* We only support default allocations. */
420 if (start != 0UL || end != ~0UL)
421 return (NULL);
422
423 m = device_get_ivars(child);
424 ch = m->m_chan;
425 rle = resource_list_find(&ch->ch_rlist, type, 0);
426 if (rle == NULL)
427 return (NULL);
428 *rid = 0;
429 return (rle->res);
430}
431
432int
433scc_bus_get_resource(device_t dev, device_t child, int type, int rid,
434 rman_res_t *startp, rman_res_t *countp)
435{
436 struct resource_list_entry *rle;
437 struct scc_chan *ch;
438 struct scc_mode *m;
439
440 if (device_get_parent(child) != dev)
441 return (EINVAL);
442
443 m = device_get_ivars(child);
444 ch = m->m_chan;
445 rle = resource_list_find(&ch->ch_rlist, type, rid);
446 if (rle == NULL)
447 return (EINVAL);
448
449 if (startp != NULL)
450 *startp = rle->start;
451 if (countp != NULL)
452 *countp = rle->count;
453 return (0);
454}
455
456int
457scc_bus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
458{
459 struct scc_chan *ch;
460 struct scc_class *cl;
461 struct scc_mode *m;
462 struct scc_softc *sc;
463
464 if (device_get_parent(child) != dev)
465 return (EINVAL);
466
467 sc = device_get_softc(dev);
468 cl = sc->sc_class;
469 m = device_get_ivars(child);
470 ch = m->m_chan;
471
472 switch (index) {
473 case SCC_IVAR_CHANNEL:
474 *result = ch->ch_nr;
475 break;
476 case SCC_IVAR_CLASS:
477 *result = cl->cl_class;
478 break;
479 case SCC_IVAR_CLOCK:
480 *result = sc->sc_bas.rclk;
481 break;
482 case SCC_IVAR_MODE:
483 *result = m->m_mode;
484 break;
485 case SCC_IVAR_REGSHFT:
486 *result = sc->sc_bas.regshft;
487 break;
488 case SCC_IVAR_HWMTX:
489 *result = (uintptr_t)&sc->sc_hwmtx;
490 break;
491 default:
492 return (EINVAL);
493 }
494 return (0);
495}
496
497int
498scc_bus_release_resource(device_t dev, device_t child, int type, int rid,
499 struct resource *res)
500{
501 struct resource_list_entry *rle;
502 struct scc_chan *ch;
503 struct scc_mode *m;
504
505 if (device_get_parent(child) != dev)
506 return (EINVAL);
507
508 m = device_get_ivars(child);
509 ch = m->m_chan;
510 rle = resource_list_find(&ch->ch_rlist, type, rid);
511 return ((rle == NULL) ? EINVAL : 0);
512}
513
514int
515scc_bus_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
516 driver_filter_t *filt, void (*ihand)(void *), void *arg, void **cookiep)
517{
518 struct scc_chan *ch;
519 struct scc_mode *m;
520 struct scc_softc *sc;
521 int c, i, isrc;
522
523 if (device_get_parent(child) != dev)
524 return (EINVAL);
525
526 /* Interrupt handlers must be FAST or MPSAFE. */
527 if (filt == NULL && !(flags & INTR_MPSAFE))
528 return (EINVAL);
529
530 sc = device_get_softc(dev);
531 if (sc->sc_polled)
532 return (ENXIO);
533
534 if (sc->sc_fastintr && filt == NULL) {
535 sc->sc_fastintr = 0;
536 for (c = 0; c < sc->sc_class->cl_channels; c++) {
537 ch = &sc->sc_chan[c];
538 if (ch->ch_ires == NULL)
539 continue;
540 bus_teardown_intr(dev, ch->ch_ires, ch->ch_icookie);
541 bus_setup_intr(dev, ch->ch_ires,
542 INTR_TYPE_TTY | INTR_MPSAFE, NULL,
543 (driver_intr_t *)scc_bfe_intr, sc, &ch->ch_icookie);
544 }
545 }
546
547 m = device_get_ivars(child);
548 m->m_hasintr = 1;
549 m->m_fastintr = (filt != NULL) ? 1 : 0;
550 m->ih = (filt != NULL) ? filt : (driver_filter_t *)ihand;
551 m->ih_arg = arg;
552
553 i = 0, isrc = SER_INT_OVERRUN;
554 while (i < SCC_ISRCCNT) {
555 m->ih_src[i] = SERDEV_IHAND(child, isrc);
556 if (m->ih_src[i] != NULL)
557 m->ih = NULL;
558 i++, isrc <<= 1;
559 }
560 return (0);
561}
562
563int
564scc_bus_teardown_intr(device_t dev, device_t child, struct resource *r,
565 void *cookie)
566{
567 struct scc_mode *m;
568 int i;
569
570 if (device_get_parent(child) != dev)
571 return (EINVAL);
572
573 m = device_get_ivars(child);
574 if (!m->m_hasintr)
575 return (EINVAL);
576
577 m->m_hasintr = 0;
578 m->m_fastintr = 0;
579 m->ih = NULL;
580 m->ih_arg = NULL;
581 for (i = 0; i < SCC_ISRCCNT; i++)
582 m->ih_src[i] = NULL;
583 return (0);
584}
|