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6baef150 CC |
1 | /* |
2 | comedi/drivers/pcmuio.c | |
3 | Driver for Winsystems PC-104 based 48-channel and 96-channel DIO boards. | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 2006 Calin A. Culianu <calin@ajvar.org> | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | /* | |
23 | Driver: pcmuio | |
24 | Description: A driver for the PCM-UIO48A and PCM-UIO96A boards from Winsystems. | |
25 | Devices: [Winsystems] PCM-UIO48A (pcmuio48), PCM-UIO96A (pcmuio96) | |
26 | Author: Calin Culianu <calin@ajvar.org> | |
27 | Updated: Fri, 13 Jan 2006 12:01:01 -0500 | |
28 | Status: works | |
29 | ||
30 | A driver for the relatively straightforward-to-program PCM-UIO48A and | |
31 | PCM-UIO96A boards from Winsystems. These boards use either one or two | |
32 | (in the 96-DIO version) WS16C48 ASIC HighDensity I/O Chips (HDIO). | |
33 | This chip is interesting in that each I/O line is individually | |
34 | programmable for INPUT or OUTPUT (thus comedi_dio_config can be done | |
35 | on a per-channel basis). Also, each chip supports edge-triggered | |
36 | interrupts for the first 24 I/O lines. Of course, since the | |
37 | 96-channel version of the board has two ASICs, it can detect polarity | |
38 | changes on up to 48 I/O lines. Since this is essentially an (non-PnP) | |
39 | ISA board, I/O Address and IRQ selection are done through jumpers on | |
40 | the board. You need to pass that information to this driver as the | |
41 | first and second comedi_config option, respectively. Note that the | |
42 | 48-channel version uses 16 bytes of IO memory and the 96-channel | |
43 | version uses 32-bytes (in case you are worried about conflicts). The | |
44 | 48-channel board is split into two 24-channel comedi subdevices. | |
45 | The 96-channel board is split into 4 24-channel DIO subdevices. | |
46 | ||
47 | Note that IRQ support has been added, but it is untested. | |
48 | ||
49 | To use edge-detection IRQ support, pass the IRQs of both ASICS | |
50 | (for the 96 channel version) or just 1 ASIC (for 48-channel version). | |
51 | Then, use use comedi_commands with TRIG_NOW. | |
52 | Your callback will be called each time an edge is triggered, and the data | |
53 | values will be two sample_t's, which should be concatenated to form one | |
54 | 32-bit unsigned int. This value is the mask of channels that had | |
55 | edges detected from your channel list. Note that the bits positions | |
56 | in the mask correspond to positions in your chanlist when you specified | |
57 | the command and *not* channel id's! | |
58 | ||
59 | To set the polarity of the edge-detection interrupts pass a nonzero value for | |
60 | either CR_RANGE or CR_AREF for edge-up polarity, or a zero value for both | |
61 | CR_RANGE and CR_AREF if you want edge-down polarity. | |
62 | ||
63 | In the 48-channel version: | |
64 | ||
65 | On subdev 0, the first 24 channels channels are edge-detect channels. | |
66 | ||
67 | In the 96-channel board you have the collowing channels that can do edge detection: | |
68 | ||
69 | subdev 0, channels 0-24 (first 24 channels of 1st ASIC) | |
70 | subdev 2, channels 0-24 (first 24 channels of 2nd ASIC) | |
71 | ||
72 | Configuration Options: | |
73 | [0] - I/O port base address | |
74 | [1] - IRQ (for first ASIC, or first 24 channels) | |
75 | [2] - IRQ for second ASIC (pcmuio96 only - IRQ for chans 48-72 .. can be the same as first irq!) | |
76 | */ | |
77 | ||
25436dc9 | 78 | #include <linux/interrupt.h> |
6baef150 | 79 | #include "../comedidev.h" |
0b8f754a | 80 | #include "pcm_common.h" |
6baef150 CC |
81 | |
82 | #include <linux/pci.h> /* for PCI devices */ | |
83 | ||
6baef150 CC |
84 | #define CHANS_PER_PORT 8 |
85 | #define PORTS_PER_ASIC 6 | |
86 | #define INTR_PORTS_PER_ASIC 3 | |
87 | #define MAX_CHANS_PER_SUBDEV 24 /* number of channels per comedi subdevice */ | |
88 | #define PORTS_PER_SUBDEV (MAX_CHANS_PER_SUBDEV/CHANS_PER_PORT) | |
89 | #define CHANS_PER_ASIC (CHANS_PER_PORT*PORTS_PER_ASIC) | |
90 | #define INTR_CHANS_PER_ASIC 24 | |
91 | #define INTR_PORTS_PER_SUBDEV (INTR_CHANS_PER_ASIC/CHANS_PER_PORT) | |
92 | #define MAX_DIO_CHANS (PORTS_PER_ASIC*2*CHANS_PER_PORT) | |
93 | #define MAX_ASICS (MAX_DIO_CHANS/CHANS_PER_ASIC) | |
94 | #define SDEV_NO ((int)(s - dev->subdevices)) | |
95 | #define CALC_N_SUBDEVS(nchans) ((nchans)/MAX_CHANS_PER_SUBDEV + (!!((nchans)%MAX_CHANS_PER_SUBDEV)) /*+ (nchans > INTR_CHANS_PER_ASIC ? 2 : 1)*/) | |
96 | /* IO Memory sizes */ | |
97 | #define ASIC_IOSIZE (0x10) | |
98 | #define PCMUIO48_IOSIZE ASIC_IOSIZE | |
99 | #define PCMUIO96_IOSIZE (ASIC_IOSIZE*2) | |
100 | ||
101 | /* Some offsets - these are all in the 16byte IO memory offset from | |
102 | the base address. Note that there is a paging scheme to swap out | |
103 | offsets 0x8-0xA using the PAGELOCK register. See the table below. | |
104 | ||
105 | Register(s) Pages R/W? Description | |
106 | -------------------------------------------------------------- | |
107 | REG_PORTx All R/W Read/Write/Configure IO | |
108 | REG_INT_PENDING All ReadOnly Quickly see which INT_IDx has int. | |
109 | REG_PAGELOCK All WriteOnly Select a page | |
110 | REG_POLx Pg. 1 only WriteOnly Select edge-detection polarity | |
111 | REG_ENABx Pg. 2 only WriteOnly Enable/Disable edge-detect. int. | |
112 | REG_INT_IDx Pg. 3 only R/W See which ports/bits have ints. | |
113 | */ | |
114 | #define REG_PORT0 0x0 | |
115 | #define REG_PORT1 0x1 | |
116 | #define REG_PORT2 0x2 | |
117 | #define REG_PORT3 0x3 | |
118 | #define REG_PORT4 0x4 | |
119 | #define REG_PORT5 0x5 | |
120 | #define REG_INT_PENDING 0x6 | |
121 | #define REG_PAGELOCK 0x7 /* page selector register, upper 2 bits select a page | |
122 | and bits 0-5 are used to 'lock down' a particular | |
123 | port above to make it readonly. */ | |
124 | #define REG_POL0 0x8 | |
125 | #define REG_POL1 0x9 | |
126 | #define REG_POL2 0xA | |
127 | #define REG_ENAB0 0x8 | |
128 | #define REG_ENAB1 0x9 | |
129 | #define REG_ENAB2 0xA | |
130 | #define REG_INT_ID0 0x8 | |
131 | #define REG_INT_ID1 0x9 | |
132 | #define REG_INT_ID2 0xA | |
133 | ||
134 | #define NUM_PAGED_REGS 3 | |
135 | #define NUM_PAGES 4 | |
136 | #define FIRST_PAGED_REG 0x8 | |
137 | #define REG_PAGE_BITOFFSET 6 | |
138 | #define REG_LOCK_BITOFFSET 0 | |
139 | #define REG_PAGE_MASK (~((0x1<<REG_PAGE_BITOFFSET)-1)) | |
140 | #define REG_LOCK_MASK ~(REG_PAGE_MASK) | |
141 | #define PAGE_POL 1 | |
142 | #define PAGE_ENAB 2 | |
143 | #define PAGE_INT_ID 3 | |
144 | ||
145 | /* | |
146 | * Board descriptions for two imaginary boards. Describing the | |
147 | * boards in this way is optional, and completely driver-dependent. | |
148 | * Some drivers use arrays such as this, other do not. | |
149 | */ | |
70a6001a | 150 | struct pcmuio_board { |
6baef150 CC |
151 | const char *name; |
152 | const int num_asics; | |
153 | const int num_channels_per_port; | |
154 | const int num_ports; | |
70a6001a | 155 | }; |
6baef150 | 156 | |
70a6001a | 157 | static const struct pcmuio_board pcmuio_boards[] = { |
6baef150 | 158 | { |
68c3dbff BP |
159 | .name = "pcmuio48", |
160 | .num_asics = 1, | |
161 | .num_ports = 6, | |
6baef150 CC |
162 | }, |
163 | { | |
68c3dbff BP |
164 | .name = "pcmuio96", |
165 | .num_asics = 2, | |
166 | .num_ports = 12, | |
6baef150 CC |
167 | }, |
168 | }; | |
169 | ||
170 | /* | |
171 | * Useful for shorthand access to the particular board structure | |
172 | */ | |
70a6001a | 173 | #define thisboard ((const struct pcmuio_board *)dev->board_ptr) |
6baef150 CC |
174 | |
175 | /* this structure is for data unique to this subdevice. */ | |
e15849e5 | 176 | struct pcmuio_subdev_private { |
6baef150 CC |
177 | /* mapping of halfwords (bytes) in port/chanarray to iobase */ |
178 | unsigned long iobases[PORTS_PER_SUBDEV]; | |
179 | ||
180 | /* The below is only used for intr subdevices */ | |
181 | struct { | |
182 | int asic; /* if non-negative, this subdev has an interrupt asic */ | |
183 | int first_chan; /* if nonnegative, the first channel id for | |
184 | interrupts. */ | |
185 | int num_asic_chans; /* the number of asic channels in this subdev | |
186 | that have interrutps */ | |
187 | int asic_chan; /* if nonnegative, the first channel id with | |
188 | respect to the asic that has interrupts */ | |
189 | int enabled_mask; /* subdev-relative channel mask for channels | |
190 | we are interested in */ | |
191 | int active; | |
192 | int stop_count; | |
193 | int continuous; | |
194 | spinlock_t spinlock; | |
195 | } intr; | |
e15849e5 | 196 | }; |
6baef150 CC |
197 | |
198 | /* this structure is for data unique to this hardware driver. If | |
199 | several hardware drivers keep similar information in this structure, | |
71b5f4f1 | 200 | feel free to suggest moving the variable to the struct comedi_device struct. */ |
055f6636 | 201 | struct pcmuio_private { |
6baef150 CC |
202 | struct { |
203 | unsigned char pagelock; /* current page and lock */ | |
204 | unsigned char pol[NUM_PAGED_REGS]; /* shadow of POLx registers */ | |
205 | unsigned char enab[NUM_PAGED_REGS]; /* shadow of ENABx registers */ | |
206 | int num; | |
207 | unsigned long iobase; | |
208 | unsigned int irq; | |
209 | spinlock_t spinlock; | |
210 | } asics[MAX_ASICS]; | |
e15849e5 | 211 | struct pcmuio_subdev_private *sprivs; |
055f6636 | 212 | }; |
6baef150 CC |
213 | |
214 | /* | |
215 | * most drivers define the following macro to make it easy to | |
216 | * access the private structure. | |
217 | */ | |
055f6636 | 218 | #define devpriv ((struct pcmuio_private *)dev->private) |
e15849e5 | 219 | #define subpriv ((struct pcmuio_subdev_private *)s->private) |
6baef150 | 220 | /* |
139dfbdf | 221 | * The struct comedi_driver structure tells the Comedi core module |
6baef150 CC |
222 | * which functions to call to configure/deconfigure (attach/detach) |
223 | * the board, and also about the kernel module that contains | |
224 | * the device code. | |
225 | */ | |
da91b269 BP |
226 | static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
227 | static int pcmuio_detach(struct comedi_device *dev); | |
6baef150 | 228 | |
139dfbdf | 229 | static struct comedi_driver driver = { |
68c3dbff BP |
230 | .driver_name = "pcmuio", |
231 | .module = THIS_MODULE, | |
232 | .attach = pcmuio_attach, | |
233 | .detach = pcmuio_detach, | |
6baef150 CC |
234 | /* It is not necessary to implement the following members if you are |
235 | * writing a driver for a ISA PnP or PCI card */ | |
236 | /* Most drivers will support multiple types of boards by | |
237 | * having an array of board structures. These were defined | |
238 | * in pcmuio_boards[] above. Note that the element 'name' | |
239 | * was first in the structure -- Comedi uses this fact to | |
240 | * extract the name of the board without knowing any details | |
241 | * about the structure except for its length. | |
242 | * When a device is attached (by comedi_config), the name | |
243 | * of the device is given to Comedi, and Comedi tries to | |
244 | * match it by going through the list of board names. If | |
245 | * there is a match, the address of the pointer is put | |
246 | * into dev->board_ptr and driver->attach() is called. | |
247 | * | |
248 | * Note that these are not necessary if you can determine | |
249 | * the type of board in software. ISA PnP, PCI, and PCMCIA | |
250 | * devices are such boards. | |
251 | */ | |
68c3dbff BP |
252 | .board_name = &pcmuio_boards[0].name, |
253 | .offset = sizeof(struct pcmuio_board), | |
8629efa4 | 254 | .num_names = ARRAY_SIZE(pcmuio_boards), |
6baef150 CC |
255 | }; |
256 | ||
814900c9 BP |
257 | static int pcmuio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
258 | struct comedi_insn *insn, unsigned int *data); | |
259 | static int pcmuio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, | |
260 | struct comedi_insn *insn, unsigned int *data); | |
6baef150 | 261 | |
70265d24 | 262 | static irqreturn_t interrupt_pcmuio(int irq, void *d); |
34c43922 | 263 | static void pcmuio_stop_intr(struct comedi_device *, struct comedi_subdevice *); |
814900c9 BP |
264 | static int pcmuio_cancel(struct comedi_device *dev, struct comedi_subdevice *s); |
265 | static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s); | |
266 | static int pcmuio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, | |
267 | struct comedi_cmd *cmd); | |
6baef150 CC |
268 | |
269 | /* some helper functions to deal with specifics of this device's registers */ | |
814900c9 BP |
270 | static void init_asics(struct comedi_device *dev); /* sets up/clears ASIC chips to defaults */ |
271 | static void switch_page(struct comedi_device *dev, int asic, int page); | |
6baef150 | 272 | #ifdef notused |
814900c9 BP |
273 | static void lock_port(struct comedi_device *dev, int asic, int port); |
274 | static void unlock_port(struct comedi_device *dev, int asic, int port); | |
6baef150 CC |
275 | #endif |
276 | ||
277 | /* | |
278 | * Attach is called by the Comedi core to configure the driver | |
279 | * for a particular board. If you specified a board_name array | |
280 | * in the driver structure, dev->board_ptr contains that | |
281 | * address. | |
282 | */ | |
da91b269 | 283 | static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
6baef150 | 284 | { |
34c43922 | 285 | struct comedi_subdevice *s; |
6baef150 CC |
286 | int sdev_no, chans_left, n_subdevs, port, asic, thisasic_chanct = 0; |
287 | unsigned long iobase; | |
288 | unsigned int irq[MAX_ASICS]; | |
289 | ||
290 | iobase = it->options[0]; | |
291 | irq[0] = it->options[1]; | |
292 | irq[1] = it->options[2]; | |
293 | ||
294 | printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name, | |
295 | iobase); | |
296 | ||
297 | dev->iobase = iobase; | |
298 | ||
299 | if (!iobase || !request_region(iobase, | |
300 | thisboard->num_asics * ASIC_IOSIZE, | |
301 | driver.driver_name)) { | |
302 | printk("I/O port conflict\n"); | |
303 | return -EIO; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Initialize dev->board_name. Note that we can use the "thisboard" | |
308 | * macro now, since we just initialized it in the last line. | |
309 | */ | |
310 | dev->board_name = thisboard->name; | |
311 | ||
312 | /* | |
313 | * Allocate the private structure area. alloc_private() is a | |
314 | * convenient macro defined in comedidev.h. | |
315 | */ | |
055f6636 | 316 | if (alloc_private(dev, sizeof(struct pcmuio_private)) < 0) { |
6baef150 CC |
317 | printk("cannot allocate private data structure\n"); |
318 | return -ENOMEM; | |
319 | } | |
320 | ||
321 | for (asic = 0; asic < MAX_ASICS; ++asic) { | |
322 | devpriv->asics[asic].num = asic; | |
323 | devpriv->asics[asic].iobase = dev->iobase + asic * ASIC_IOSIZE; | |
324 | devpriv->asics[asic].irq = 0; /* this gets actually set at the end of | |
325 | this function when we | |
5f74ea14 | 326 | request_irqs */ |
6baef150 CC |
327 | spin_lock_init(&devpriv->asics[asic].spinlock); |
328 | } | |
329 | ||
330 | chans_left = CHANS_PER_ASIC * thisboard->num_asics; | |
331 | n_subdevs = CALC_N_SUBDEVS(chans_left); | |
332 | devpriv->sprivs = | |
e15849e5 | 333 | kcalloc(n_subdevs, sizeof(struct pcmuio_subdev_private), GFP_KERNEL); |
6baef150 CC |
334 | if (!devpriv->sprivs) { |
335 | printk("cannot allocate subdevice private data structures\n"); | |
336 | return -ENOMEM; | |
337 | } | |
338 | /* | |
339 | * Allocate the subdevice structures. alloc_subdevice() is a | |
340 | * convenient macro defined in comedidev.h. | |
341 | * | |
342 | * Allocate 2 subdevs (32 + 16 DIO lines) or 3 32 DIO subdevs for the | |
343 | * 96-channel version of the board. | |
344 | */ | |
345 | if (alloc_subdevices(dev, n_subdevs) < 0) { | |
346 | printk("cannot allocate subdevice data structures\n"); | |
347 | return -ENOMEM; | |
348 | } | |
349 | ||
350 | port = 0; | |
351 | asic = 0; | |
352 | for (sdev_no = 0; sdev_no < (int)dev->n_subdevices; ++sdev_no) { | |
353 | int byte_no; | |
354 | ||
355 | s = dev->subdevices + sdev_no; | |
356 | s->private = devpriv->sprivs + sdev_no; | |
357 | s->maxdata = 1; | |
358 | s->range_table = &range_digital; | |
359 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; | |
360 | s->type = COMEDI_SUBD_DIO; | |
361 | s->insn_bits = pcmuio_dio_insn_bits; | |
362 | s->insn_config = pcmuio_dio_insn_config; | |
214e7b5c | 363 | s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV); |
6baef150 CC |
364 | subpriv->intr.asic = -1; |
365 | subpriv->intr.first_chan = -1; | |
366 | subpriv->intr.asic_chan = -1; | |
367 | subpriv->intr.num_asic_chans = -1; | |
368 | subpriv->intr.active = 0; | |
369 | s->len_chanlist = 1; | |
370 | ||
371 | /* save the ioport address for each 'port' of 8 channels in the | |
372 | subdevice */ | |
373 | for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) { | |
374 | if (port >= PORTS_PER_ASIC) { | |
375 | port = 0; | |
376 | ++asic; | |
377 | thisasic_chanct = 0; | |
378 | } | |
379 | subpriv->iobases[byte_no] = | |
380 | devpriv->asics[asic].iobase + port; | |
381 | ||
382 | if (thisasic_chanct < | |
383 | CHANS_PER_PORT * INTR_PORTS_PER_ASIC | |
384 | && subpriv->intr.asic < 0) { | |
385 | /* this is an interrupt subdevice, so setup the struct */ | |
386 | subpriv->intr.asic = asic; | |
387 | subpriv->intr.active = 0; | |
388 | subpriv->intr.stop_count = 0; | |
389 | subpriv->intr.first_chan = byte_no * 8; | |
390 | subpriv->intr.asic_chan = thisasic_chanct; | |
391 | subpriv->intr.num_asic_chans = | |
392 | s->n_chan - subpriv->intr.first_chan; | |
393 | dev->read_subdev = s; | |
394 | s->subdev_flags |= SDF_CMD_READ; | |
395 | s->cancel = pcmuio_cancel; | |
396 | s->do_cmd = pcmuio_cmd; | |
397 | s->do_cmdtest = pcmuio_cmdtest; | |
398 | s->len_chanlist = subpriv->intr.num_asic_chans; | |
399 | } | |
400 | thisasic_chanct += CHANS_PER_PORT; | |
401 | } | |
402 | spin_lock_init(&subpriv->intr.spinlock); | |
403 | ||
404 | chans_left -= s->n_chan; | |
405 | ||
406 | if (!chans_left) { | |
407 | asic = 0; /* reset the asic to our first asic, to do intr subdevs */ | |
408 | port = 0; | |
409 | } | |
410 | ||
411 | } | |
412 | ||
413 | init_asics(dev); /* clear out all the registers, basically */ | |
414 | ||
415 | for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) { | |
416 | if (irq[asic] | |
5f74ea14 | 417 | && request_irq(irq[asic], interrupt_pcmuio, |
6baef150 CC |
418 | IRQF_SHARED, thisboard->name, dev)) { |
419 | int i; | |
420 | /* unroll the allocated irqs.. */ | |
421 | for (i = asic - 1; i >= 0; --i) { | |
5f74ea14 | 422 | free_irq(irq[i], dev); |
6baef150 CC |
423 | devpriv->asics[i].irq = irq[i] = 0; |
424 | } | |
425 | irq[asic] = 0; | |
426 | } | |
427 | devpriv->asics[asic].irq = irq[asic]; | |
428 | } | |
429 | ||
430 | dev->irq = irq[0]; /* grr.. wish comedi dev struct supported multiple | |
431 | irqs.. */ | |
432 | ||
433 | if (irq[0]) { | |
434 | printk("irq: %u ", irq[0]); | |
435 | if (irq[1] && thisboard->num_asics == 2) | |
436 | printk("second ASIC irq: %u ", irq[1]); | |
437 | } else { | |
438 | printk("(IRQ mode disabled) "); | |
439 | } | |
440 | ||
441 | printk("attached\n"); | |
442 | ||
443 | return 1; | |
444 | } | |
445 | ||
446 | /* | |
447 | * _detach is called to deconfigure a device. It should deallocate | |
448 | * resources. | |
449 | * This function is also called when _attach() fails, so it should be | |
450 | * careful not to release resources that were not necessarily | |
451 | * allocated by _attach(). dev->private and dev->subdevices are | |
452 | * deallocated automatically by the core. | |
453 | */ | |
da91b269 | 454 | static int pcmuio_detach(struct comedi_device *dev) |
6baef150 CC |
455 | { |
456 | int i; | |
457 | ||
458 | printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name); | |
459 | if (dev->iobase) | |
460 | release_region(dev->iobase, ASIC_IOSIZE * thisboard->num_asics); | |
461 | ||
462 | for (i = 0; i < MAX_ASICS; ++i) { | |
463 | if (devpriv->asics[i].irq) | |
5f74ea14 | 464 | free_irq(devpriv->asics[i].irq, dev); |
6baef150 CC |
465 | } |
466 | ||
467 | if (devpriv && devpriv->sprivs) | |
468 | kfree(devpriv->sprivs); | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /* DIO devices are slightly special. Although it is possible to | |
474 | * implement the insn_read/insn_write interface, it is much more | |
475 | * useful to applications if you implement the insn_bits interface. | |
476 | * This allows packed reading/writing of the DIO channels. The | |
477 | * comedi core can convert between insn_bits and insn_read/write */ | |
da91b269 BP |
478 | static int pcmuio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, |
479 | struct comedi_insn *insn, unsigned int *data) | |
6baef150 CC |
480 | { |
481 | int byte_no; | |
482 | if (insn->n != 2) | |
483 | return -EINVAL; | |
484 | ||
485 | /* NOTE: | |
486 | reading a 0 means this channel was high | |
487 | writine a 0 sets the channel high | |
488 | reading a 1 means this channel was low | |
489 | writing a 1 means set this channel low | |
490 | ||
491 | Therefore everything is always inverted. */ | |
492 | ||
493 | /* The insn data is a mask in data[0] and the new data | |
494 | * in data[1], each channel cooresponding to a bit. */ | |
495 | ||
496 | #ifdef DAMMIT_ITS_BROKEN | |
497 | /* DEBUG */ | |
498 | printk("write mask: %08x data: %08x\n", data[0], data[1]); | |
499 | #endif | |
500 | ||
501 | s->state = 0; | |
502 | ||
503 | for (byte_no = 0; byte_no < s->n_chan / CHANS_PER_PORT; ++byte_no) { | |
504 | /* address of 8-bit port */ | |
505 | unsigned long ioaddr = subpriv->iobases[byte_no], | |
506 | /* bit offset of port in 32-bit doubleword */ | |
507 | offset = byte_no * 8; | |
508 | /* this 8-bit port's data */ | |
509 | unsigned char byte = 0, | |
510 | /* The write mask for this port (if any) */ | |
511 | write_mask_byte = (data[0] >> offset) & 0xff, | |
512 | /* The data byte for this port */ | |
513 | data_byte = (data[1] >> offset) & 0xff; | |
514 | ||
515 | byte = inb(ioaddr); /* read all 8-bits for this port */ | |
516 | ||
517 | #ifdef DAMMIT_ITS_BROKEN | |
518 | /* DEBUG */ | |
519 | printk("byte %d wmb %02x db %02x offset %02d io %04x, data_in %02x ", byte_no, (unsigned)write_mask_byte, (unsigned)data_byte, offset, ioaddr, (unsigned)byte); | |
520 | #endif | |
521 | ||
522 | if (write_mask_byte) { | |
523 | /* this byte has some write_bits -- so set the output lines */ | |
524 | byte &= ~write_mask_byte; /* clear bits for write mask */ | |
525 | byte |= ~data_byte & write_mask_byte; /* set to inverted data_byte */ | |
526 | /* Write out the new digital output state */ | |
527 | outb(byte, ioaddr); | |
528 | } | |
529 | #ifdef DAMMIT_ITS_BROKEN | |
530 | /* DEBUG */ | |
531 | printk("data_out_byte %02x\n", (unsigned)byte); | |
532 | #endif | |
533 | /* save the digital input lines for this byte.. */ | |
534 | s->state |= ((unsigned int)byte) << offset; | |
535 | } | |
536 | ||
537 | /* now return the DIO lines to data[1] - note they came inverted! */ | |
538 | data[1] = ~s->state; | |
539 | ||
540 | #ifdef DAMMIT_ITS_BROKEN | |
541 | /* DEBUG */ | |
542 | printk("s->state %08x data_out %08x\n", s->state, data[1]); | |
543 | #endif | |
544 | ||
545 | return 2; | |
546 | } | |
547 | ||
548 | /* The input or output configuration of each digital line is | |
549 | * configured by a special insn_config instruction. chanspec | |
550 | * contains the channel to be changed, and data[0] contains the | |
551 | * value COMEDI_INPUT or COMEDI_OUTPUT. */ | |
da91b269 BP |
552 | static int pcmuio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, |
553 | struct comedi_insn *insn, unsigned int *data) | |
6baef150 CC |
554 | { |
555 | int chan = CR_CHAN(insn->chanspec), byte_no = chan / 8, bit_no = | |
556 | chan % 8; | |
557 | unsigned long ioaddr; | |
558 | unsigned char byte; | |
559 | ||
560 | /* Compute ioaddr for this channel */ | |
561 | ioaddr = subpriv->iobases[byte_no]; | |
562 | ||
563 | /* NOTE: | |
564 | writing a 0 an IO channel's bit sets the channel to INPUT | |
565 | and pulls the line high as well | |
566 | ||
567 | writing a 1 to an IO channel's bit pulls the line low | |
568 | ||
569 | All channels are implicitly always in OUTPUT mode -- but when | |
570 | they are high they can be considered to be in INPUT mode.. | |
571 | ||
572 | Thus, we only force channels low if the config request was INPUT, | |
573 | otherwise we do nothing to the hardware. */ | |
574 | ||
575 | switch (data[0]) { | |
576 | case INSN_CONFIG_DIO_OUTPUT: | |
577 | /* save to io_bits -- don't actually do anything since | |
578 | all input channels are also output channels... */ | |
579 | s->io_bits |= 1 << chan; | |
580 | break; | |
581 | case INSN_CONFIG_DIO_INPUT: | |
582 | /* write a 0 to the actual register representing the channel | |
583 | to set it to 'input'. 0 means "float high". */ | |
584 | byte = inb(ioaddr); | |
585 | byte &= ~(1 << bit_no); | |
586 | /**< set input channel to '0' */ | |
587 | ||
588 | /* write out byte -- this is the only time we actually affect the | |
589 | hardware as all channels are implicitly output -- but input | |
590 | channels are set to float-high */ | |
591 | outb(byte, ioaddr); | |
592 | ||
593 | /* save to io_bits */ | |
594 | s->io_bits &= ~(1 << chan); | |
595 | break; | |
596 | ||
597 | case INSN_CONFIG_DIO_QUERY: | |
598 | /* retreive from shadow register */ | |
599 | data[1] = | |
600 | (s-> | |
601 | io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; | |
602 | return insn->n; | |
603 | break; | |
604 | ||
605 | default: | |
606 | return -EINVAL; | |
607 | break; | |
608 | } | |
609 | ||
610 | return insn->n; | |
611 | } | |
612 | ||
da91b269 | 613 | static void init_asics(struct comedi_device *dev) |
6baef150 CC |
614 | { /* sets up an |
615 | ASIC chip to defaults */ | |
616 | int asic; | |
617 | ||
618 | for (asic = 0; asic < thisboard->num_asics; ++asic) { | |
619 | int port, page; | |
620 | unsigned long baseaddr = dev->iobase + asic * ASIC_IOSIZE; | |
621 | ||
622 | switch_page(dev, asic, 0); /* switch back to page 0 */ | |
623 | ||
624 | /* first, clear all the DIO port bits */ | |
625 | for (port = 0; port < PORTS_PER_ASIC; ++port) | |
626 | outb(0, baseaddr + REG_PORT0 + port); | |
627 | ||
628 | /* Next, clear all the paged registers for each page */ | |
629 | for (page = 1; page < NUM_PAGES; ++page) { | |
630 | int reg; | |
631 | /* now clear all the paged registers */ | |
632 | switch_page(dev, asic, page); | |
633 | for (reg = FIRST_PAGED_REG; | |
634 | reg < FIRST_PAGED_REG + NUM_PAGED_REGS; ++reg) | |
635 | outb(0, baseaddr + reg); | |
636 | } | |
637 | ||
638 | /* DEBUG set rising edge interrupts on port0 of both asics */ | |
639 | /*switch_page(dev, asic, PAGE_POL); | |
640 | outb(0xff, baseaddr + REG_POL0); | |
641 | switch_page(dev, asic, PAGE_ENAB); | |
642 | outb(0xff, baseaddr + REG_ENAB0); */ | |
643 | /* END DEBUG */ | |
644 | ||
645 | switch_page(dev, asic, 0); /* switch back to default page 0 */ | |
646 | ||
647 | } | |
648 | } | |
649 | ||
da91b269 | 650 | static void switch_page(struct comedi_device *dev, int asic, int page) |
6baef150 CC |
651 | { |
652 | if (asic < 0 || asic >= thisboard->num_asics) | |
653 | return; /* paranoia */ | |
654 | if (page < 0 || page >= NUM_PAGES) | |
655 | return; /* more paranoia */ | |
656 | ||
657 | devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK; | |
658 | devpriv->asics[asic].pagelock |= page << REG_PAGE_BITOFFSET; | |
659 | ||
660 | /* now write out the shadow register */ | |
661 | outb(devpriv->asics[asic].pagelock, | |
662 | dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK); | |
663 | } | |
664 | ||
665 | #ifdef notused | |
da91b269 | 666 | static void lock_port(struct comedi_device *dev, int asic, int port) |
6baef150 CC |
667 | { |
668 | if (asic < 0 || asic >= thisboard->num_asics) | |
669 | return; /* paranoia */ | |
670 | if (port < 0 || port >= PORTS_PER_ASIC) | |
671 | return; /* more paranoia */ | |
672 | ||
673 | devpriv->asics[asic].pagelock |= 0x1 << port; | |
674 | /* now write out the shadow register */ | |
675 | outb(devpriv->asics[asic].pagelock, | |
676 | dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK); | |
677 | } | |
678 | ||
da91b269 | 679 | static void unlock_port(struct comedi_device *dev, int asic, int port) |
6baef150 CC |
680 | { |
681 | if (asic < 0 || asic >= thisboard->num_asics) | |
682 | return; /* paranoia */ | |
683 | if (port < 0 || port >= PORTS_PER_ASIC) | |
684 | return; /* more paranoia */ | |
685 | devpriv->asics[asic].pagelock &= ~(0x1 << port) | REG_LOCK_MASK; | |
686 | /* now write out the shadow register */ | |
687 | outb(devpriv->asics[asic].pagelock, | |
688 | dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK); | |
689 | } | |
690 | #endif /* notused */ | |
691 | ||
70265d24 | 692 | static irqreturn_t interrupt_pcmuio(int irq, void *d) |
6baef150 CC |
693 | { |
694 | int asic, got1 = 0; | |
71b5f4f1 | 695 | struct comedi_device *dev = (struct comedi_device *) d; |
6baef150 CC |
696 | |
697 | for (asic = 0; asic < MAX_ASICS; ++asic) { | |
698 | if (irq == devpriv->asics[asic].irq) { | |
699 | unsigned long flags; | |
700 | unsigned triggered = 0; | |
701 | unsigned long iobase = devpriv->asics[asic].iobase; | |
702 | /* it is an interrupt for ASIC #asic */ | |
703 | unsigned char int_pend; | |
704 | ||
5f74ea14 | 705 | spin_lock_irqsave(&devpriv->asics[asic].spinlock, flags); |
6baef150 CC |
706 | |
707 | int_pend = inb(iobase + REG_INT_PENDING) & 0x07; | |
708 | ||
709 | if (int_pend) { | |
710 | int port; | |
711 | for (port = 0; port < INTR_PORTS_PER_ASIC; | |
712 | ++port) { | |
713 | if (int_pend & (0x1 << port)) { | |
714 | unsigned char | |
715 | io_lines_with_edges = 0; | |
716 | switch_page(dev, asic, | |
717 | PAGE_INT_ID); | |
718 | io_lines_with_edges = | |
719 | inb(iobase + | |
720 | REG_INT_ID0 + port); | |
721 | ||
722 | if (io_lines_with_edges) | |
723 | /* clear pending interrupt */ | |
724 | outb(0, iobase + | |
725 | REG_INT_ID0 + | |
726 | port); | |
727 | ||
728 | triggered |= | |
729 | io_lines_with_edges << | |
730 | port * 8; | |
731 | } | |
732 | } | |
733 | ||
734 | ++got1; | |
735 | } | |
736 | ||
5f74ea14 | 737 | spin_unlock_irqrestore(&devpriv->asics[asic].spinlock, flags); |
6baef150 CC |
738 | |
739 | if (triggered) { | |
34c43922 | 740 | struct comedi_subdevice *s; |
6baef150 CC |
741 | /* TODO here: dispatch io lines to subdevs with commands.. */ |
742 | printk("PCMUIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", irq, asic, triggered); | |
743 | for (s = dev->subdevices; | |
744 | s < dev->subdevices + dev->n_subdevices; | |
745 | ++s) { | |
746 | if (subpriv->intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */ | |
747 | unsigned long flags; | |
748 | unsigned oldevents; | |
749 | ||
5f74ea14 | 750 | spin_lock_irqsave (&subpriv->intr.spinlock, flags); |
6baef150 CC |
751 | |
752 | oldevents = s->async->events; | |
753 | ||
754 | if (subpriv->intr.active) { | |
755 | unsigned mytrig = | |
756 | ((triggered >> | |
757 | subpriv-> | |
758 | intr. | |
759 | asic_chan) | |
760 | & ((0x1 << subpriv->intr.num_asic_chans) - 1)) << subpriv->intr.first_chan; | |
761 | if (mytrig & subpriv-> | |
762 | intr. | |
763 | enabled_mask) { | |
790c5541 | 764 | unsigned int val = |
6baef150 CC |
765 | 0; |
766 | unsigned int n, | |
767 | ch, len; | |
768 | ||
769 | len = s->async-> | |
770 | cmd. | |
771 | chanlist_len; | |
772 | for (n = 0; | |
773 | n < len; | |
774 | n++) { | |
775 | ch = CR_CHAN(s->async->cmd.chanlist[n]); | |
776 | if (mytrig & (1U << ch)) { | |
777 | val |= (1U << n); | |
778 | } | |
779 | } | |
780 | /* Write the scan to the buffer. */ | |
9b9bcba0 | 781 | if (comedi_buf_put(s->async, ((short *) &val)[0]) |
6baef150 CC |
782 | && |
783 | comedi_buf_put | |
9b9bcba0 | 784 | (s->async, ((short *) &val)[1])) { |
6baef150 CC |
785 | s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS); |
786 | } else { | |
787 | /* Overflow! Stop acquisition!! */ | |
788 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ | |
789 | pcmuio_stop_intr | |
790 | (dev, | |
791 | s); | |
792 | } | |
793 | ||
794 | /* Check for end of acquisition. */ | |
795 | if (!subpriv-> | |
796 | intr. | |
797 | continuous) | |
798 | { | |
799 | /* stop_src == TRIG_COUNT */ | |
800 | if (subpriv->intr.stop_count > 0) { | |
801 | subpriv-> | |
802 | intr. | |
803 | stop_count--; | |
804 | if (subpriv->intr.stop_count == 0) { | |
805 | s->async->events |= COMEDI_CB_EOA; | |
806 | /* TODO: STOP_ACQUISITION_CALL_HERE!! */ | |
807 | pcmuio_stop_intr | |
808 | (dev, | |
809 | s); | |
810 | } | |
811 | } | |
812 | } | |
813 | } | |
814 | } | |
815 | ||
5f74ea14 | 816 | spin_unlock_irqrestore(&subpriv->intr.spinlock, flags); |
6baef150 CC |
817 | |
818 | if (oldevents != | |
819 | s->async->events) { | |
820 | comedi_event(dev, s); | |
821 | } | |
822 | ||
823 | } | |
824 | ||
825 | } | |
826 | } | |
827 | ||
828 | } | |
829 | } | |
830 | if (!got1) | |
831 | return IRQ_NONE; /* interrupt from other source */ | |
832 | return IRQ_HANDLED; | |
833 | } | |
834 | ||
da91b269 | 835 | static void pcmuio_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s) |
6baef150 CC |
836 | { |
837 | int nports, firstport, asic, port; | |
838 | ||
c3744138 BP |
839 | asic = subpriv->intr.asic; |
840 | if (asic < 0) | |
6baef150 CC |
841 | return; /* not an interrupt subdev */ |
842 | ||
843 | subpriv->intr.enabled_mask = 0; | |
844 | subpriv->intr.active = 0; | |
845 | s->async->inttrig = 0; | |
846 | nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT; | |
847 | firstport = subpriv->intr.asic_chan / CHANS_PER_PORT; | |
848 | switch_page(dev, asic, PAGE_ENAB); | |
849 | for (port = firstport; port < firstport + nports; ++port) { | |
850 | /* disable all intrs for this subdev.. */ | |
851 | outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port); | |
852 | } | |
853 | } | |
854 | ||
da91b269 | 855 | static int pcmuio_start_intr(struct comedi_device *dev, struct comedi_subdevice *s) |
6baef150 CC |
856 | { |
857 | if (!subpriv->intr.continuous && subpriv->intr.stop_count == 0) { | |
858 | /* An empty acquisition! */ | |
859 | s->async->events |= COMEDI_CB_EOA; | |
860 | subpriv->intr.active = 0; | |
861 | return 1; | |
862 | } else { | |
863 | unsigned bits = 0, pol_bits = 0, n; | |
864 | int nports, firstport, asic, port; | |
ea6d0d4c | 865 | struct comedi_cmd *cmd = &s->async->cmd; |
6baef150 | 866 | |
c3744138 BP |
867 | asic = subpriv->intr.asic; |
868 | if (asic < 0) | |
6baef150 CC |
869 | return 1; /* not an interrupt |
870 | subdev */ | |
871 | subpriv->intr.enabled_mask = 0; | |
872 | subpriv->intr.active = 1; | |
873 | nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT; | |
874 | firstport = subpriv->intr.asic_chan / CHANS_PER_PORT; | |
875 | if (cmd->chanlist) { | |
876 | for (n = 0; n < cmd->chanlist_len; n++) { | |
877 | bits |= (1U << CR_CHAN(cmd->chanlist[n])); | |
878 | pol_bits |= (CR_AREF(cmd->chanlist[n]) | |
879 | || CR_RANGE(cmd->chanlist[n]) ? 1U : 0U) | |
880 | << CR_CHAN(cmd->chanlist[n]); | |
881 | } | |
882 | } | |
883 | bits &= ((0x1 << subpriv->intr.num_asic_chans) - | |
884 | 1) << subpriv->intr.first_chan; | |
885 | subpriv->intr.enabled_mask = bits; | |
886 | ||
887 | switch_page(dev, asic, PAGE_ENAB); | |
888 | for (port = firstport; port < firstport + nports; ++port) { | |
889 | unsigned enab = | |
890 | bits >> (subpriv->intr.first_chan + (port - | |
891 | firstport) * 8) & 0xff, pol = | |
892 | pol_bits >> (subpriv->intr.first_chan + (port - | |
893 | firstport) * 8) & 0xff; | |
894 | /* set enab intrs for this subdev.. */ | |
895 | outb(enab, | |
896 | devpriv->asics[asic].iobase + REG_ENAB0 + port); | |
897 | switch_page(dev, asic, PAGE_POL); | |
898 | outb(pol, | |
899 | devpriv->asics[asic].iobase + REG_ENAB0 + port); | |
900 | } | |
901 | } | |
902 | return 0; | |
903 | } | |
904 | ||
da91b269 | 905 | static int pcmuio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
6baef150 CC |
906 | { |
907 | unsigned long flags; | |
908 | ||
5f74ea14 | 909 | spin_lock_irqsave(&subpriv->intr.spinlock, flags); |
6baef150 CC |
910 | if (subpriv->intr.active) |
911 | pcmuio_stop_intr(dev, s); | |
5f74ea14 | 912 | spin_unlock_irqrestore(&subpriv->intr.spinlock, flags); |
6baef150 CC |
913 | |
914 | return 0; | |
915 | } | |
916 | ||
917 | /* | |
918 | * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice. | |
919 | */ | |
920 | static int | |
da91b269 | 921 | pcmuio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s, |
6baef150 CC |
922 | unsigned int trignum) |
923 | { | |
924 | unsigned long flags; | |
925 | int event = 0; | |
926 | ||
927 | if (trignum != 0) | |
928 | return -EINVAL; | |
929 | ||
5f74ea14 | 930 | spin_lock_irqsave(&subpriv->intr.spinlock, flags); |
6baef150 CC |
931 | s->async->inttrig = 0; |
932 | if (subpriv->intr.active) { | |
933 | event = pcmuio_start_intr(dev, s); | |
934 | } | |
5f74ea14 | 935 | spin_unlock_irqrestore(&subpriv->intr.spinlock, flags); |
6baef150 CC |
936 | |
937 | if (event) { | |
938 | comedi_event(dev, s); | |
939 | } | |
940 | ||
941 | return 1; | |
942 | } | |
943 | ||
944 | /* | |
945 | * 'do_cmd' function for an 'INTERRUPT' subdevice. | |
946 | */ | |
da91b269 | 947 | static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
6baef150 | 948 | { |
ea6d0d4c | 949 | struct comedi_cmd *cmd = &s->async->cmd; |
6baef150 CC |
950 | unsigned long flags; |
951 | int event = 0; | |
952 | ||
5f74ea14 | 953 | spin_lock_irqsave(&subpriv->intr.spinlock, flags); |
6baef150 CC |
954 | subpriv->intr.active = 1; |
955 | ||
956 | /* Set up end of acquisition. */ | |
957 | switch (cmd->stop_src) { | |
958 | case TRIG_COUNT: | |
959 | subpriv->intr.continuous = 0; | |
960 | subpriv->intr.stop_count = cmd->stop_arg; | |
961 | break; | |
962 | default: | |
963 | /* TRIG_NONE */ | |
964 | subpriv->intr.continuous = 1; | |
965 | subpriv->intr.stop_count = 0; | |
966 | break; | |
967 | } | |
968 | ||
969 | /* Set up start of acquisition. */ | |
970 | switch (cmd->start_src) { | |
971 | case TRIG_INT: | |
972 | s->async->inttrig = pcmuio_inttrig_start_intr; | |
973 | break; | |
974 | default: | |
975 | /* TRIG_NOW */ | |
976 | event = pcmuio_start_intr(dev, s); | |
977 | break; | |
978 | } | |
5f74ea14 | 979 | spin_unlock_irqrestore(&subpriv->intr.spinlock, flags); |
6baef150 CC |
980 | |
981 | if (event) { | |
982 | comedi_event(dev, s); | |
983 | } | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
6baef150 | 988 | static int |
da91b269 | 989 | pcmuio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) |
6baef150 | 990 | { |
0b8f754a | 991 | return comedi_pcm_cmdtest(dev, s, cmd); |
6baef150 CC |
992 | } |
993 | ||
994 | /* | |
995 | * A convenient macro that defines init_module() and cleanup_module(), | |
996 | * as necessary. | |
997 | */ | |
998 | COMEDI_INITCLEANUP(driver); |