]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - sys/dev/adlink/adlink.c
Implement pci_enable_msi() and pci_disable_msi() in the LinuxKPI.
[FreeBSD/FreeBSD.git] / sys / dev / adlink / adlink.c
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 2003-2004 Poul-Henning Kamp
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The names of the authors may not be used to endorse or promote
16  *    products derived from this software without specific prior written
17  *    permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  *
31  * This is a device driver or the Adlink 9812 and 9810 ADC cards, mainly
32  * intended to support Software Defined Radio reception of timesignals
33  * in the VLF band.  See http://phk.freebsd.dk/loran-c
34  *
35  * The driver is configured with ioctls which define a ringbuffer with
36  * a given number of chunks in it.  The a control structure and the
37  * ringbuffer can then be mmap(2)'ed into userland and the application
38  * can operate on the data directly.
39  *
40  * Tested with 10MHz external clock, divisor of 2 (ie: 5MHz sampling),
41  * One channel active (ie: 2 bytes per sample = 10MB/sec) on a 660MHz
42  * Celeron PC.
43  *
44  */
45
46 #ifdef _KERNEL
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/malloc.h>
53 #include <sys/kernel.h>
54 #include <sys/module.h>
55 #include <sys/kthread.h>
56 #include <sys/conf.h>
57 #include <sys/bus.h>
58 #include <machine/bus.h>
59 #include <machine/resource.h>
60 #include <sys/rman.h>
61 #include <dev/pci/pcireg.h>
62 #include <dev/pci/pcivar.h>
63 #include <pci_if.h>
64 #include <vm/vm.h>
65 #include <vm/pmap.h>
66
67 #endif /* _KERNEL */
68
69 #include <sys/ioccom.h>
70
71 #define ADLINK_SETDIVISOR       _IOWR('A', 255, u_int)  /* divisor */
72 #define ADLINK_SETCHUNKSIZE     _IOWR('A', 254, u_int)  /* bytes */
73 #define ADLINK_SETRINGSIZE      _IOWR('A', 253, u_int)  /* bytes */
74 #define ADLINK_START            _IOWR('A', 252, u_int)  /* dummy */
75 #define ADLINK_STOP             _IOWR('A', 251, u_int)  /* dummy */
76 #define ADLINK_RESET            _IOWR('A', 250, u_int)  /* dummy */
77
78 struct page0 {
79         u_int                   version;
80         int                     state;
81 #         define STATE_RESET    -1
82 #         define STATE_RUN      0
83         u_int                   divisor;        /* int */
84         u_int                   chunksize;      /* bytes */
85         u_int                   ringsize;       /* chunks */
86         u_int                   o_sample;       /*
87                                                  * offset of ring generation
88                                                  * array
89                                                  */
90         u_int                   o_ring;         /* offset of ring */
91 };
92
93 #define PAGE0VERSION    20050219
94
95 #ifdef _KERNEL
96
97 struct pgstat {
98         uint64_t                *sample;
99         vm_paddr_t              phys;
100         void                    *virt;
101         struct pgstat           *next;
102 };
103
104 struct softc {
105         device_t                device;
106         void                    *intrhand;
107         struct resource         *res[3];
108         struct cdev             *dev;
109         off_t                   mapvir;
110         int                     error;
111         struct page0            *p0;
112         u_int                   nchunks;
113         struct pgstat           *chunks;
114         struct pgstat           *next;
115         uint64_t                sample;
116 };
117
118 static d_ioctl_t adlink_ioctl;
119 static d_mmap_t adlink_mmap;
120 static int adlink_intr(void *arg);
121
122 static struct cdevsw adlink_cdevsw = {
123         .d_version =    D_VERSION,
124         .d_flags =      D_NEEDGIANT,
125         .d_ioctl =      adlink_ioctl,
126         .d_mmap =       adlink_mmap,
127         .d_name =       "adlink",
128 };
129
130 static int
131 adlink_intr(void *arg)
132 {
133         struct softc *sc;
134         struct pgstat *pg;
135         uint32_t u;
136
137         sc = arg;
138         u = bus_read_4(sc->res[0], 0x38);
139         if (!(u & 0x00800000))
140                 return (FILTER_STRAY);
141         bus_write_4(sc->res[0], 0x38, u | 0x003f4000);
142
143         sc->sample += sc->p0->chunksize / 2;
144         pg = sc->next;
145         *(pg->sample) = sc->sample;
146
147         u = bus_read_4(sc->res[1], 0x18);
148         if (u & 1)
149                 sc->p0->state = EIO;
150
151         if (sc->p0->state != STATE_RUN) {
152                 printf("adlink: stopping %d\n", sc->p0->state);
153                 return (FILTER_STRAY);
154         }
155
156         pg = pg->next;
157         sc->next = pg;
158         *(pg->sample) = 0;
159         bus_write_4(sc->res[0], 0x24, pg->phys);
160         bus_write_4(sc->res[0], 0x28, sc->p0->chunksize);
161         wakeup(sc);
162         return (FILTER_HANDLED);
163 }
164
165 static int
166 adlink_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
167     int nprot, vm_memattr_t *memattr)
168 {
169         struct softc *sc;
170         vm_offset_t o;
171         int i;
172         struct pgstat *pg;
173
174         sc = dev->si_drv1;
175         if (nprot != VM_PROT_READ)
176                 return (-1);
177         if (offset == 0) {
178                 *paddr = vtophys(sc->p0);
179                 return (0);
180         }
181         o = PAGE_SIZE;
182         pg = sc->chunks;
183         for (i = 0; i < sc->nchunks; i++, pg++) {
184                 if (offset - o >= sc->p0->chunksize) {
185                         o += sc->p0->chunksize;
186                         continue;
187                 }
188                 *paddr = pg->phys + (offset - o);
189                 return (0);
190         }
191         return (-1);
192 }
193
194 static int
195 adlink_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
196 {
197         struct softc *sc;
198         int i, error;
199         u_int u;
200         struct pgstat *pg;
201         uint64_t *sample;
202         
203         sc = dev->si_drv1;
204         u = *(u_int*)data;
205         error = 0;
206         switch (cmd) {
207         case ADLINK_SETDIVISOR:
208                 if (sc->p0->state == STATE_RUN)
209                         return (EBUSY);
210                 if (u & 1)
211                         return (EINVAL);
212                 sc->p0->divisor = u;
213                 break;
214         case ADLINK_SETCHUNKSIZE:
215                 if (sc->p0->state != STATE_RESET)
216                         return (EBUSY);
217                 if (u % PAGE_SIZE)
218                         return (EINVAL);
219                 if (sc->p0->ringsize != 0 && sc->p0->ringsize % u)
220                         return (EINVAL);
221                 sc->p0->chunksize = u;
222                 break;
223         case ADLINK_SETRINGSIZE:
224                 if (sc->p0->state != STATE_RESET)
225                         return (EBUSY);
226                 if (u % PAGE_SIZE)
227                         return (EINVAL);
228                 if (sc->p0->chunksize != 0 && u % sc->p0->chunksize)
229                         return (EINVAL);
230                 sc->p0->ringsize = u;
231                 break;
232         case ADLINK_START:
233                 if (sc->p0->state == STATE_RUN)
234                         return (EBUSY);
235                 if (sc->p0->state == STATE_RESET) {
236                         
237                         if (sc->p0->chunksize == 0)
238                                 sc->p0->chunksize = 4 * PAGE_SIZE;
239                         if (sc->p0->ringsize == 0)
240                                 sc->p0->ringsize = 16 * sc->p0->chunksize;
241                         if (sc->p0->divisor == 0)
242                                 sc->p0->divisor = 4;
243
244                         sc->nchunks = sc->p0->ringsize / sc->p0->chunksize;
245                         if (sc->nchunks * sizeof (*pg->sample) +
246                             sizeof *sc->p0 > PAGE_SIZE)
247                                 return (EINVAL);
248                         sc->p0->o_ring = PAGE_SIZE;
249                         sample = (uint64_t *)(sc->p0 + 1);
250                         sc->p0->o_sample =
251                             (uintptr_t)sample - (uintptr_t)(sc->p0);
252                         pg = malloc(sizeof *pg * sc->nchunks,
253                             M_DEVBUF, M_WAITOK | M_ZERO);
254                         sc->chunks = pg;
255                         for (i = 0; i < sc->nchunks; i++) {
256                                 pg->sample = sample;
257                                 *pg->sample = 0;
258                                 sample++;
259                                 pg->virt = contigmalloc(sc->p0->chunksize,
260                                     M_DEVBUF, M_WAITOK,
261                                     0ul, 0xfffffffful,
262                                     PAGE_SIZE, 0);
263                                 pg->phys = vtophys(pg->virt);
264                                 if (i == sc->nchunks - 1)
265                                         pg->next = sc->chunks;
266                                 else
267                                         pg->next = pg + 1;
268                                 pg++;
269                         }
270                         sc->next = sc->chunks;
271                 }
272
273                 /* Reset generation numbers */
274                 pg = sc->chunks;
275                 for (i = 0; i < sc->nchunks; i++) {
276                         *pg->sample = 0;
277                         pg++;
278                 }
279
280                 /* Enable interrupts on write complete */
281                 bus_write_4(sc->res[0], 0x38, 0x00004000);
282
283                 /* Sample CH0 only */
284                 bus_write_4(sc->res[1], 0x00, 1);
285
286                 /* Divide clock by four */
287                 bus_write_4(sc->res[1], 0x04, sc->p0->divisor);
288
289                 /* Software trigger mode: software */
290                 bus_write_4(sc->res[1], 0x08, 0);
291
292                 /* Trigger level zero */
293                 bus_write_4(sc->res[1], 0x0c, 0);
294
295                 /* Trigger source CH0 (not used) */
296                 bus_write_4(sc->res[1], 0x10, 0);
297
298                 /* Fifo control/status: flush */
299                 bus_write_4(sc->res[1], 0x18, 3);
300
301                 /* Clock source: external sine */
302                 bus_write_4(sc->res[1], 0x20, 2);
303
304                 /* Chipmunks are go! */
305                 sc->p0->state = STATE_RUN;
306
307                 /* Set up Write DMA */
308                 pg = sc->next = sc->chunks;
309                 *(pg->sample) = 0;
310                 bus_write_4(sc->res[0], 0x24, pg->phys);
311                 bus_write_4(sc->res[0], 0x28, sc->p0->chunksize);
312                 u = bus_read_4(sc->res[0], 0x3c);
313                 bus_write_4(sc->res[0], 0x3c, u | 0x00000600);
314
315                 /* Acquisition Enable Register: go! */
316                 bus_write_4(sc->res[1], 0x1c, 1);
317
318                 break;
319         case ADLINK_STOP:
320                 if (sc->p0->state == STATE_RESET)
321                         break;
322                 sc->p0->state = EINTR;  
323                 while (*(sc->next->sample) == 0)
324                         tsleep(sc, PUSER | PCATCH, "adstop", 1);
325                 break;
326 #ifdef notyet
327         /*
328          * I'm not sure we can actually do this.  How do we revoke
329          * the mmap'ed pages from any process having them mmapped ?
330          */
331         case ADLINK_RESET:
332                 if (sc->p0->state == STATE_RESET)
333                         break;
334                 sc->p0->state = EINTR;  
335                 while (*(sc->next->samp) == 0)
336                         tsleep(sc, PUSER | PCATCH, "adreset", 1);
337                 /* deallocate ring buffer */
338                 break;
339 #endif
340         default:
341                 error = ENOIOCTL;
342                 break;
343         }
344         return (error);
345 }
346
347 static devclass_t adlink_devclass;
348
349 struct pci_id
350 {
351         uint16_t        vendor;
352         uint16_t        device;
353         const char      *desc;
354 } adlink_id[] = {
355         { .vendor = 0x10e8, .device = 0x80da,
356           .desc ="Adlink PCI-9812 4 ch 12 bit 20 msps" }
357 };
358
359 static int
360 adlink_probe(device_t self)
361 {
362         int i;
363         uint16_t vendor, device;
364
365         vendor = pci_get_vendor(self);
366         device = pci_get_device(self);
367         for (i = 0; i < nitems(adlink_id); i++) {
368                 if (adlink_id[i].vendor == vendor &&
369                     adlink_id[i].device == device) {
370                         device_set_desc(self, adlink_id[i].desc);
371                         return (BUS_PROBE_DEFAULT);
372                 }
373         }
374         return (ENXIO);
375 }
376
377 static struct resource_spec adlink_res_spec[] = {
378         { SYS_RES_IOPORT,       PCIR_BAR(0),    RF_ACTIVE},
379         { SYS_RES_IOPORT,       PCIR_BAR(1),    RF_ACTIVE},
380         { SYS_RES_IRQ,          0,              RF_ACTIVE | RF_SHAREABLE},
381         { -1, 0, 0 }
382 };
383
384 static int
385 adlink_attach(device_t self)
386 {
387         struct softc *sc;
388         int i, error;
389
390         sc = device_get_softc(self);
391         bzero(sc, sizeof *sc);
392         sc->device = self;
393
394         error = bus_alloc_resources(self, adlink_res_spec, sc->res);
395         if (error)
396                 return (error);
397
398         i = bus_setup_intr(self, sc->res[2], INTR_TYPE_MISC,
399             adlink_intr, NULL, sc, &sc->intrhand);
400         if (i) {
401                 printf("adlink: Couldn't get FAST intr\n");
402                 i = bus_setup_intr(self, sc->res[2],
403                     INTR_MPSAFE | INTR_TYPE_MISC,
404                     NULL, (driver_intr_t *)adlink_intr, sc, &sc->intrhand);
405         }
406
407         if (i) {
408                 bus_release_resources(self, adlink_res_spec, sc->res);
409                 return (ENODEV);
410         }
411
412         sc->p0 = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK | M_ZERO);
413         sc->p0->version = PAGE0VERSION;
414         sc->p0->state = STATE_RESET;
415
416         sc->dev = make_dev(&adlink_cdevsw, device_get_unit(self),
417             UID_ROOT, GID_WHEEL, 0444, "adlink%d", device_get_unit(self));
418         sc->dev->si_drv1 = sc;
419
420         return (0);
421 }
422
423 static device_method_t adlink_methods[] = {
424         /* Device interface */
425         DEVMETHOD(device_probe,         adlink_probe),
426         DEVMETHOD(device_attach,        adlink_attach),
427         DEVMETHOD(device_suspend,       bus_generic_suspend),
428         DEVMETHOD(device_resume,        bus_generic_resume),
429         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
430
431         DEVMETHOD_END
432 };
433  
434 static driver_t adlink_driver = {
435         "adlink",
436         adlink_methods,
437         sizeof(struct softc)
438 };
439
440 DRIVER_MODULE(adlink, pci, adlink_driver, adlink_devclass, 0, 0);
441 MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, adlink, adlink_id,
442     nitems(adlink_id));
443 #endif /* _KERNEL */