1 | /* $NetBSD: pcmcom.c,v 1.40 2012/10/27 17:18:37 chs Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1998, 2000, 2004 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by RedBack Networks, Inc. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Device driver for multi-port PCMCIA serial cards, written by |
34 | * Jason R. Thorpe for RedBack Networks, Inc. |
35 | * |
36 | * Most of these cards are simply multiple UARTs sharing a single interrupt |
37 | * line, and rely on the fact that PCMCIA level-triggered interrupts can |
38 | * be shared. There are no special interrupt registers on them, as there |
39 | * are on most ISA multi-port serial cards. |
40 | * |
41 | * If there are other cards that have interrupt registers, they should not |
42 | * be glued into this driver. Rather, separate drivers should be written |
43 | * for those devices, as we have in the ISA multi-port serial card case. |
44 | */ |
45 | |
46 | #include <sys/cdefs.h> |
47 | __KERNEL_RCSID(0, "$NetBSD: pcmcom.c,v 1.40 2012/10/27 17:18:37 chs Exp $" ); |
48 | |
49 | #include <sys/param.h> |
50 | #include <sys/systm.h> |
51 | #include <sys/device.h> |
52 | #include <sys/termios.h> |
53 | #include <sys/malloc.h> |
54 | |
55 | #include <sys/bus.h> |
56 | #include <sys/intr.h> |
57 | |
58 | #include <dev/ic/comreg.h> |
59 | #include <dev/ic/comvar.h> |
60 | |
61 | #include <dev/pcmcia/pcmciavar.h> |
62 | #include <dev/pcmcia/pcmciareg.h> |
63 | #include <dev/pcmcia/pcmciadevs.h> |
64 | |
65 | #include "com.h" |
66 | #include "pcmcom.h" |
67 | |
68 | #include "locators.h" |
69 | |
70 | struct pcmcom_softc { |
71 | device_t sc_dev; /* generic device glue */ |
72 | |
73 | struct pcmcia_function *sc_pf; /* our PCMCIA function */ |
74 | void *sc_ih; /* interrupt handle */ |
75 | int sc_enabled_count; /* enabled count */ |
76 | |
77 | #define NSLAVES 8 |
78 | device_t sc_slaves[NSLAVES]; /* slave info */ |
79 | int sc_nslaves; /* slave count */ |
80 | |
81 | int sc_state; |
82 | #define PCMCOM_ATTACHED 3 |
83 | }; |
84 | |
85 | struct pcmcom_attach_args { |
86 | bus_space_tag_t pca_iot; /* I/O tag */ |
87 | bus_space_handle_t pca_ioh; /* I/O handle */ |
88 | int pca_slave; /* slave # */ |
89 | }; |
90 | |
91 | int pcmcom_match(device_t, cfdata_t, void *); |
92 | int pcmcom_validate_config(struct pcmcia_config_entry *); |
93 | void pcmcom_attach(device_t, device_t, void *); |
94 | int pcmcom_detach(device_t, int); |
95 | void pcmcom_childdet(device_t, device_t); |
96 | |
97 | CFATTACH_DECL_NEW(pcmcom, sizeof(struct pcmcom_softc), |
98 | pcmcom_match, pcmcom_attach, pcmcom_detach, NULL); |
99 | |
100 | const struct pcmcia_product pcmcom_products[] = { |
101 | { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232, |
102 | PCMCIA_CIS_INVALID }, |
103 | #if 0 /* does not work */ |
104 | { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232_A, |
105 | PCMCIA_CIS_INVALID }, |
106 | #endif |
107 | }; |
108 | const size_t pcmcom_nproducts = __arraycount(pcmcom_products); |
109 | |
110 | int pcmcom_print(void *, const char *); |
111 | |
112 | int pcmcom_enable(struct pcmcom_softc *); |
113 | void pcmcom_disable(struct pcmcom_softc *); |
114 | |
115 | int pcmcom_intr(void *); |
116 | |
117 | int |
118 | pcmcom_match(device_t parent, cfdata_t cf, void *aux) |
119 | { |
120 | struct pcmcia_attach_args *pa = aux; |
121 | |
122 | if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, |
123 | sizeof(pcmcom_products[0]), NULL)) |
124 | return (2); /* beat com_pcmcia */ |
125 | return (0); |
126 | } |
127 | |
128 | int |
129 | pcmcom_validate_config(struct pcmcia_config_entry *cfe) |
130 | { |
131 | if (cfe->iftype != PCMCIA_IFTYPE_IO || |
132 | cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) |
133 | return (EINVAL); |
134 | return (0); |
135 | } |
136 | |
137 | void |
138 | pcmcom_attach(device_t parent, device_t self, void *aux) |
139 | { |
140 | struct pcmcom_softc *sc = device_private(self); |
141 | struct pcmcia_attach_args *pa = aux; |
142 | struct pcmcia_config_entry *cfe; |
143 | int slave; |
144 | int error; |
145 | int locs[PCMCOMCF_NLOCS]; |
146 | |
147 | sc->sc_dev = self; |
148 | |
149 | sc->sc_pf = pa->pf; |
150 | |
151 | error = pcmcia_function_configure(pa->pf, pcmcom_validate_config); |
152 | if (error) { |
153 | aprint_error_dev(self, "configure failed, error=%d\n" , error); |
154 | return; |
155 | } |
156 | |
157 | cfe = pa->pf->cfe; |
158 | sc->sc_nslaves = cfe->num_iospace; |
159 | |
160 | error = pcmcom_enable(sc); |
161 | if (error) |
162 | goto fail; |
163 | |
164 | /* Attach the children. */ |
165 | for (slave = 0; slave < sc->sc_nslaves; slave++) { |
166 | struct pcmcom_attach_args pca; |
167 | |
168 | printf("%s: slave %d\n" , device_xname(self), slave); |
169 | |
170 | pca.pca_iot = cfe->iospace[slave].handle.iot; |
171 | pca.pca_ioh = cfe->iospace[slave].handle.ioh; |
172 | pca.pca_slave = slave; |
173 | |
174 | locs[PCMCOMCF_SLAVE] = slave; |
175 | |
176 | sc->sc_slaves[slave] = config_found_sm_loc(sc->sc_dev, |
177 | "pcmcom" , locs, |
178 | &pca, pcmcom_print, config_stdsubmatch); |
179 | } |
180 | |
181 | pcmcom_disable(sc); |
182 | sc->sc_state = PCMCOM_ATTACHED; |
183 | return; |
184 | |
185 | fail: |
186 | pcmcia_function_unconfigure(pa->pf); |
187 | } |
188 | |
189 | void |
190 | pcmcom_childdet(device_t self, device_t child) |
191 | { |
192 | struct pcmcom_softc *sc = device_private(self); |
193 | int slave; |
194 | |
195 | for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { |
196 | if (sc->sc_slaves[slave] == child) |
197 | sc->sc_slaves[slave] = NULL; |
198 | } |
199 | } |
200 | |
201 | int |
202 | pcmcom_detach(device_t self, int flags) |
203 | { |
204 | struct pcmcom_softc *sc = device_private(self); |
205 | int slave, error; |
206 | |
207 | if (sc->sc_state != PCMCOM_ATTACHED) |
208 | return (0); |
209 | |
210 | for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { |
211 | if (sc->sc_slaves[slave]) { |
212 | /* Detach the child. */ |
213 | error = config_detach(sc->sc_slaves[slave], flags); |
214 | if (error) |
215 | return (error); |
216 | } |
217 | } |
218 | |
219 | pcmcia_function_unconfigure(sc->sc_pf); |
220 | |
221 | return (0); |
222 | } |
223 | |
224 | int |
225 | pcmcom_print(void *aux, const char *pnp) |
226 | { |
227 | struct pcmcom_attach_args *pca = aux; |
228 | |
229 | /* only com's can attach to pcmcom's; easy... */ |
230 | if (pnp) |
231 | aprint_normal("com at %s" , pnp); |
232 | |
233 | aprint_normal(" slave %d" , pca->pca_slave); |
234 | |
235 | return (UNCONF); |
236 | } |
237 | |
238 | int |
239 | pcmcom_intr(void *arg) |
240 | { |
241 | #if NCOM > 0 |
242 | struct pcmcom_softc *sc = arg; |
243 | int i, rval = 0; |
244 | |
245 | if (sc->sc_enabled_count == 0) |
246 | return (0); |
247 | |
248 | for (i = 0; i < sc->sc_nslaves; i++) { |
249 | if (sc->sc_slaves[i]) |
250 | rval |= comintr(sc->sc_slaves[i]); |
251 | } |
252 | |
253 | return (rval); |
254 | #else |
255 | return (0); |
256 | #endif /* NCOM > 0 */ |
257 | } |
258 | |
259 | int |
260 | pcmcom_enable(struct pcmcom_softc *sc) |
261 | { |
262 | int error; |
263 | |
264 | if (sc->sc_enabled_count++ != 0) |
265 | return (0); |
266 | |
267 | /* Establish the interrupt. */ |
268 | sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, |
269 | pcmcom_intr, sc); |
270 | if (!sc->sc_ih) |
271 | return (EIO); |
272 | |
273 | error = pcmcia_function_enable(sc->sc_pf); |
274 | if (error) { |
275 | pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); |
276 | sc->sc_ih = 0; |
277 | } |
278 | |
279 | return (error); |
280 | } |
281 | |
282 | void |
283 | pcmcom_disable(struct pcmcom_softc *sc) |
284 | { |
285 | |
286 | if (--sc->sc_enabled_count != 0) |
287 | return; |
288 | |
289 | pcmcia_function_disable(sc->sc_pf); |
290 | pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); |
291 | sc->sc_ih = 0; |
292 | } |
293 | |
294 | /****** Here begins the com attachment code. ******/ |
295 | |
296 | #if NCOM_PCMCOM > 0 |
297 | int com_pcmcom_match(device_t, cfdata_t , void *); |
298 | void com_pcmcom_attach(device_t, device_t, void *); |
299 | |
300 | /* No pcmcom-specific goo in the softc; it's all in the parent. */ |
301 | CFATTACH_DECL_NEW(com_pcmcom, sizeof(struct com_softc), |
302 | com_pcmcom_match, com_pcmcom_attach, com_detach, NULL); |
303 | |
304 | int com_pcmcom_enable(struct com_softc *); |
305 | void com_pcmcom_disable(struct com_softc *); |
306 | |
307 | int |
308 | com_pcmcom_match(device_t parent, cfdata_t cf, void *aux) |
309 | { |
310 | |
311 | /* Device is always present. */ |
312 | return (1); |
313 | } |
314 | |
315 | void |
316 | com_pcmcom_attach(device_t parent, device_t self, void *aux) |
317 | { |
318 | struct com_softc *sc = device_private(self); |
319 | struct pcmcom_attach_args *pca = aux; |
320 | |
321 | sc->sc_dev = self; |
322 | COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); |
323 | sc->enabled = 1; |
324 | |
325 | sc->sc_frequency = COM_FREQ; |
326 | |
327 | sc->enable = com_pcmcom_enable; |
328 | sc->disable = com_pcmcom_disable; |
329 | |
330 | com_attach_subr(sc); |
331 | |
332 | sc->enabled = 0; |
333 | } |
334 | |
335 | int |
336 | com_pcmcom_enable(struct com_softc *sc) |
337 | { |
338 | return pcmcom_enable(device_private(device_parent(sc->sc_dev))); |
339 | } |
340 | |
341 | void |
342 | com_pcmcom_disable(struct com_softc *sc) |
343 | { |
344 | |
345 | pcmcom_disable(device_private(device_parent(sc->sc_dev))); |
346 | } |
347 | #endif /* NCOM_PCMCOM > 0 */ |
348 | |