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Linux/drivers/staging/comedi/drivers/ni_pcidio.c

  1 /*
  2     comedi/drivers/ni_pcidio.c
  3     driver for National Instruments PCI-DIO-32HS
  4 
  5     COMEDI - Linux Control and Measurement Device Interface
  6     Copyright (C) 1999,2002 David A. Schleef <ds@schleef.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 /*
 19 Driver: ni_pcidio
 20 Description: National Instruments PCI-DIO32HS, PCI-6533
 21 Author: ds
 22 Status: works
 23 Devices: [National Instruments] PCI-DIO-32HS (ni_pcidio)
 24          [National Instruments] PXI-6533, PCI-6533 (pxi-6533)
 25          [National Instruments] PCI-6534 (pci-6534)
 26 Updated: Mon, 09 Jan 2012 14:27:23 +0000
 27 
 28 The DIO32HS board appears as one subdevice, with 32 channels.
 29 Each channel is individually I/O configurable.  The channel order
 30 is 0=A0, 1=A1, 2=A2, ... 8=B0, 16=C0, 24=D0.  The driver only
 31 supports simple digital I/O; no handshaking is supported.
 32 
 33 DMA mostly works for the PCI-DIO32HS, but only in timed input mode.
 34 
 35 The PCI-DIO-32HS/PCI-6533 has a configurable external trigger. Setting
 36 scan_begin_arg to 0 or CR_EDGE triggers on the leading edge. Setting
 37 scan_begin_arg to CR_INVERT or (CR_EDGE | CR_INVERT) triggers on the
 38 trailing edge.
 39 
 40 This driver could be easily modified to support AT-MIO32HS and
 41 AT-MIO96.
 42 
 43 The PCI-6534 requires a firmware upload after power-up to work, the
 44 firmware data and instructions for loading it with comedi_config
 45 it are contained in the
 46 comedi_nonfree_firmware tarball available from http://www.comedi.org
 47 */
 48 
 49 #define USE_DMA
 50 
 51 #include <linux/module.h>
 52 #include <linux/delay.h>
 53 #include <linux/interrupt.h>
 54 #include <linux/sched.h>
 55 
 56 #include "../comedi_pci.h"
 57 
 58 #include "mite.h"
 59 
 60 /* defines for the PCI-DIO-32HS */
 61 
 62 #define Window_Address                  4       /* W */
 63 #define Interrupt_And_Window_Status     4       /* R */
 64 #define IntStatus1                              (1<<0)
 65 #define IntStatus2                              (1<<1)
 66 #define WindowAddressStatus_mask                0x7c
 67 
 68 #define Master_DMA_And_Interrupt_Control 5      /* W */
 69 #define InterruptLine(x)                        ((x)&3)
 70 #define OpenInt                         (1<<2)
 71 #define Group_Status                    5       /* R */
 72 #define DataLeft                                (1<<0)
 73 #define Req                                     (1<<2)
 74 #define StopTrig                                (1<<3)
 75 
 76 #define Group_1_Flags                   6       /* R */
 77 #define Group_2_Flags                   7       /* R */
 78 #define TransferReady                           (1<<0)
 79 #define CountExpired                            (1<<1)
 80 #define Waited                          (1<<5)
 81 #define PrimaryTC                               (1<<6)
 82 #define SecondaryTC                             (1<<7)
 83   /* #define SerialRose */
 84   /* #define ReqRose */
 85   /* #define Paused */
 86 
 87 #define Group_1_First_Clear             6       /* W */
 88 #define Group_2_First_Clear             7       /* W */
 89 #define ClearWaited                             (1<<3)
 90 #define ClearPrimaryTC                  (1<<4)
 91 #define ClearSecondaryTC                        (1<<5)
 92 #define DMAReset                                (1<<6)
 93 #define FIFOReset                               (1<<7)
 94 #define ClearAll                                0xf8
 95 
 96 #define Group_1_FIFO                    8       /* W */
 97 #define Group_2_FIFO                    12      /* W */
 98 
 99 #define Transfer_Count                  20
100 #define Chip_ID_D                       24
101 #define Chip_ID_I                       25
102 #define Chip_ID_O                       26
103 #define Chip_Version                    27
104 #define Port_IO(x)                      (28+(x))
105 #define Port_Pin_Directions(x)          (32+(x))
106 #define Port_Pin_Mask(x)                (36+(x))
107 #define Port_Pin_Polarities(x)          (40+(x))
108 
109 #define Master_Clock_Routing            45
110 #define RTSIClocking(x)                 (((x)&3)<<4)
111 
112 #define Group_1_Second_Clear            46      /* W */
113 #define Group_2_Second_Clear            47      /* W */
114 #define ClearExpired                            (1<<0)
115 
116 #define Port_Pattern(x)                 (48+(x))
117 
118 #define Data_Path                       64
119 #define FIFOEnableA             (1<<0)
120 #define FIFOEnableB             (1<<1)
121 #define FIFOEnableC             (1<<2)
122 #define FIFOEnableD             (1<<3)
123 #define Funneling(x)            (((x)&3)<<4)
124 #define GroupDirection  (1<<7)
125 
126 #define Protocol_Register_1             65
127 #define OpMode                          Protocol_Register_1
128 #define RunMode(x)              ((x)&7)
129 #define Numbered                (1<<3)
130 
131 #define Protocol_Register_2             66
132 #define ClockReg                        Protocol_Register_2
133 #define ClockLine(x)            (((x)&3)<<5)
134 #define InvertStopTrig  (1<<7)
135 #define DataLatching(x)       (((x)&3)<<5)
136 
137 #define Protocol_Register_3             67
138 #define Sequence                        Protocol_Register_3
139 
140 #define Protocol_Register_14            68      /* 16 bit */
141 #define ClockSpeed                      Protocol_Register_14
142 
143 #define Protocol_Register_4             70
144 #define ReqReg                          Protocol_Register_4
145 #define ReqConditioning(x)      (((x)&7)<<3)
146 
147 #define Protocol_Register_5             71
148 #define BlockMode                       Protocol_Register_5
149 
150 #define FIFO_Control                    72
151 #define ReadyLevel(x)           ((x)&7)
152 
153 #define Protocol_Register_6             73
154 #define LinePolarities                  Protocol_Register_6
155 #define InvertAck               (1<<0)
156 #define InvertReq               (1<<1)
157 #define InvertClock             (1<<2)
158 #define InvertSerial            (1<<3)
159 #define OpenAck         (1<<4)
160 #define OpenClock               (1<<5)
161 
162 #define Protocol_Register_7             74
163 #define AckSer                          Protocol_Register_7
164 #define AckLine(x)              (((x)&3)<<2)
165 #define ExchangePins            (1<<7)
166 
167 #define Interrupt_Control               75
168   /* bits same as flags */
169 
170 #define DMA_Line_Control_Group1         76
171 #define DMA_Line_Control_Group2         108
172 /* channel zero is none */
173 static inline unsigned primary_DMAChannel_bits(unsigned channel)
174 {
175         return channel & 0x3;
176 }
177 
178 static inline unsigned secondary_DMAChannel_bits(unsigned channel)
179 {
180         return (channel << 2) & 0xc;
181 }
182 
183 #define Transfer_Size_Control           77
184 #define TransferWidth(x)        ((x)&3)
185 #define TransferLength(x)       (((x)&3)<<3)
186 #define RequireRLevel           (1<<5)
187 
188 #define Protocol_Register_15            79
189 #define DAQOptions                      Protocol_Register_15
190 #define StartSource(x)                  ((x)&0x3)
191 #define InvertStart                             (1<<2)
192 #define StopSource(x)                           (((x)&0x3)<<3)
193 #define ReqStart                                (1<<6)
194 #define PreStart                                (1<<7)
195 
196 #define Pattern_Detection               81
197 #define DetectionMethod                 (1<<0)
198 #define InvertMatch                             (1<<1)
199 #define IE_Pattern_Detection                    (1<<2)
200 
201 #define Protocol_Register_9             82
202 #define ReqDelay                        Protocol_Register_9
203 
204 #define Protocol_Register_10            83
205 #define ReqNotDelay                     Protocol_Register_10
206 
207 #define Protocol_Register_11            84
208 #define AckDelay                        Protocol_Register_11
209 
210 #define Protocol_Register_12            85
211 #define AckNotDelay                     Protocol_Register_12
212 
213 #define Protocol_Register_13            86
214 #define Data1Delay                      Protocol_Register_13
215 
216 #define Protocol_Register_8             88      /* 32 bit */
217 #define StartDelay                      Protocol_Register_8
218 
219 /* Firmware files for PCI-6524 */
220 #define FW_PCI_6534_MAIN                "ni6534a.bin"
221 #define FW_PCI_6534_SCARAB_DI           "niscrb01.bin"
222 #define FW_PCI_6534_SCARAB_DO           "niscrb02.bin"
223 MODULE_FIRMWARE(FW_PCI_6534_MAIN);
224 MODULE_FIRMWARE(FW_PCI_6534_SCARAB_DI);
225 MODULE_FIRMWARE(FW_PCI_6534_SCARAB_DO);
226 
227 enum pci_6534_firmware_registers {      /* 16 bit */
228         Firmware_Control_Register = 0x100,
229         Firmware_Status_Register = 0x104,
230         Firmware_Data_Register = 0x108,
231         Firmware_Mask_Register = 0x10c,
232         Firmware_Debug_Register = 0x110,
233 };
234 /* main fpga registers (32 bit)*/
235 enum pci_6534_fpga_registers {
236         FPGA_Control1_Register = 0x200,
237         FPGA_Control2_Register = 0x204,
238         FPGA_Irq_Mask_Register = 0x208,
239         FPGA_Status_Register = 0x20c,
240         FPGA_Signature_Register = 0x210,
241         FPGA_SCALS_Counter_Register = 0x280,    /*write-clear */
242         FPGA_SCAMS_Counter_Register = 0x284,    /*write-clear */
243         FPGA_SCBLS_Counter_Register = 0x288,    /*write-clear */
244         FPGA_SCBMS_Counter_Register = 0x28c,    /*write-clear */
245         FPGA_Temp_Control_Register = 0x2a0,
246         FPGA_DAR_Register = 0x2a8,
247         FPGA_ELC_Read_Register = 0x2b8,
248         FPGA_ELC_Write_Register = 0x2bc,
249 };
250 enum FPGA_Control_Bits {
251         FPGA_Enable_Bit = 0x8000,
252 };
253 
254 #define TIMER_BASE 50           /* nanoseconds */
255 
256 #ifdef USE_DMA
257 #define IntEn (CountExpired|Waited|PrimaryTC|SecondaryTC)
258 #else
259 #define IntEn (TransferReady|CountExpired|Waited|PrimaryTC|SecondaryTC)
260 #endif
261 
262 enum nidio_boardid {
263         BOARD_PCIDIO_32HS,
264         BOARD_PXI6533,
265         BOARD_PCI6534,
266 };
267 
268 struct nidio_board {
269         const char *name;
270         unsigned int uses_firmware:1;
271 };
272 
273 static const struct nidio_board nidio_boards[] = {
274         [BOARD_PCIDIO_32HS] = {
275                 .name           = "pci-dio-32hs",
276         },
277         [BOARD_PXI6533] = {
278                 .name           = "pxi-6533",
279         },
280         [BOARD_PCI6534] = {
281                 .name           = "pci-6534",
282                 .uses_firmware  = 1,
283         },
284 };
285 
286 struct nidio96_private {
287         struct mite_struct *mite;
288         int boardtype;
289         int dio;
290         unsigned short OpModeBits;
291         struct mite_channel *di_mite_chan;
292         struct mite_dma_descriptor_ring *di_mite_ring;
293         spinlock_t mite_channel_lock;
294 };
295 
296 static int ni_pcidio_request_di_mite_channel(struct comedi_device *dev)
297 {
298         struct nidio96_private *devpriv = dev->private;
299         unsigned long flags;
300 
301         spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
302         BUG_ON(devpriv->di_mite_chan);
303         devpriv->di_mite_chan =
304             mite_request_channel_in_range(devpriv->mite,
305                                           devpriv->di_mite_ring, 1, 2);
306         if (!devpriv->di_mite_chan) {
307                 spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
308                 dev_err(dev->class_dev, "failed to reserve mite dma channel\n");
309                 return -EBUSY;
310         }
311         devpriv->di_mite_chan->dir = COMEDI_INPUT;
312         writeb(primary_DMAChannel_bits(devpriv->di_mite_chan->channel) |
313                secondary_DMAChannel_bits(devpriv->di_mite_chan->channel),
314                dev->mmio + DMA_Line_Control_Group1);
315         mmiowb();
316         spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
317         return 0;
318 }
319 
320 static void ni_pcidio_release_di_mite_channel(struct comedi_device *dev)
321 {
322         struct nidio96_private *devpriv = dev->private;
323         unsigned long flags;
324 
325         spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
326         if (devpriv->di_mite_chan) {
327                 mite_dma_disarm(devpriv->di_mite_chan);
328                 mite_dma_reset(devpriv->di_mite_chan);
329                 mite_release_channel(devpriv->di_mite_chan);
330                 devpriv->di_mite_chan = NULL;
331                 writeb(primary_DMAChannel_bits(0) |
332                        secondary_DMAChannel_bits(0),
333                        dev->mmio + DMA_Line_Control_Group1);
334                 mmiowb();
335         }
336         spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
337 }
338 
339 static int setup_mite_dma(struct comedi_device *dev, struct comedi_subdevice *s)
340 {
341         struct nidio96_private *devpriv = dev->private;
342         int retval;
343         unsigned long flags;
344 
345         retval = ni_pcidio_request_di_mite_channel(dev);
346         if (retval)
347                 return retval;
348 
349         /* write alloc the entire buffer */
350         comedi_buf_write_alloc(s, s->async->prealloc_bufsz);
351 
352         spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
353         if (devpriv->di_mite_chan) {
354                 mite_prep_dma(devpriv->di_mite_chan, 32, 32);
355                 mite_dma_arm(devpriv->di_mite_chan);
356         } else {
357                 retval = -EIO;
358         }
359         spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
360 
361         return retval;
362 }
363 
364 static int ni_pcidio_poll(struct comedi_device *dev, struct comedi_subdevice *s)
365 {
366         struct nidio96_private *devpriv = dev->private;
367         unsigned long irq_flags;
368         int count;
369 
370         spin_lock_irqsave(&dev->spinlock, irq_flags);
371         spin_lock(&devpriv->mite_channel_lock);
372         if (devpriv->di_mite_chan)
373                 mite_sync_input_dma(devpriv->di_mite_chan, s);
374         spin_unlock(&devpriv->mite_channel_lock);
375         count = comedi_buf_n_bytes_ready(s);
376         spin_unlock_irqrestore(&dev->spinlock, irq_flags);
377         return count;
378 }
379 
380 static irqreturn_t nidio_interrupt(int irq, void *d)
381 {
382         struct comedi_device *dev = d;
383         struct nidio96_private *devpriv = dev->private;
384         struct comedi_subdevice *s = dev->read_subdev;
385         struct comedi_async *async = s->async;
386         struct mite_struct *mite = devpriv->mite;
387         unsigned int auxdata;
388         int flags;
389         int status;
390         int work = 0;
391         unsigned int m_status = 0;
392 
393         /* interrupcions parasites */
394         if (!dev->attached) {
395                 /* assume it's from another card */
396                 return IRQ_NONE;
397         }
398 
399         /* Lock to avoid race with comedi_poll */
400         spin_lock(&dev->spinlock);
401 
402         status = readb(dev->mmio + Interrupt_And_Window_Status);
403         flags = readb(dev->mmio + Group_1_Flags);
404 
405         spin_lock(&devpriv->mite_channel_lock);
406         if (devpriv->di_mite_chan)
407                 m_status = mite_get_status(devpriv->di_mite_chan);
408 
409         if (m_status & CHSR_INT) {
410                 if (m_status & CHSR_LINKC) {
411                         writel(CHOR_CLRLC,
412                                mite->mite_io_addr +
413                                MITE_CHOR(devpriv->di_mite_chan->channel));
414                         mite_sync_input_dma(devpriv->di_mite_chan, s);
415                         /* XXX need to byteswap */
416                 }
417                 if (m_status & ~(CHSR_INT | CHSR_LINKC | CHSR_DONE | CHSR_DRDY |
418                                  CHSR_DRQ1 | CHSR_MRDY)) {
419                         dev_dbg(dev->class_dev,
420                                 "unknown mite interrupt, disabling IRQ\n");
421                         async->events |= COMEDI_CB_ERROR;
422                         disable_irq(dev->irq);
423                 }
424         }
425         spin_unlock(&devpriv->mite_channel_lock);
426 
427         while (status & DataLeft) {
428                 work++;
429                 if (work > 20) {
430                         dev_dbg(dev->class_dev, "too much work in interrupt\n");
431                         writeb(0x00,
432                                dev->mmio + Master_DMA_And_Interrupt_Control);
433                         break;
434                 }
435 
436                 flags &= IntEn;
437 
438                 if (flags & TransferReady) {
439                         while (flags & TransferReady) {
440                                 work++;
441                                 if (work > 100) {
442                                         dev_dbg(dev->class_dev,
443                                                 "too much work in interrupt\n");
444                                         writeb(0x00, dev->mmio +
445                                                Master_DMA_And_Interrupt_Control
446                                               );
447                                         goto out;
448                                 }
449                                 auxdata = readl(dev->mmio + Group_1_FIFO);
450                                 comedi_buf_write_samples(s, &auxdata, 1);
451                                 flags = readb(dev->mmio + Group_1_Flags);
452                         }
453                 }
454 
455                 if (flags & CountExpired) {
456                         writeb(ClearExpired, dev->mmio + Group_1_Second_Clear);
457                         async->events |= COMEDI_CB_EOA;
458 
459                         writeb(0x00, dev->mmio + OpMode);
460                         break;
461                 } else if (flags & Waited) {
462                         writeb(ClearWaited, dev->mmio + Group_1_First_Clear);
463                         async->events |= COMEDI_CB_ERROR;
464                         break;
465                 } else if (flags & PrimaryTC) {
466                         writeb(ClearPrimaryTC,
467                                dev->mmio + Group_1_First_Clear);
468                         async->events |= COMEDI_CB_EOA;
469                 } else if (flags & SecondaryTC) {
470                         writeb(ClearSecondaryTC,
471                                dev->mmio + Group_1_First_Clear);
472                         async->events |= COMEDI_CB_EOA;
473                 }
474 
475                 flags = readb(dev->mmio + Group_1_Flags);
476                 status = readb(dev->mmio + Interrupt_And_Window_Status);
477         }
478 
479 out:
480         comedi_handle_events(dev, s);
481 #if 0
482         if (!tag)
483                 writeb(0x03, dev->mmio + Master_DMA_And_Interrupt_Control);
484 #endif
485 
486         spin_unlock(&dev->spinlock);
487         return IRQ_HANDLED;
488 }
489 
490 static int ni_pcidio_insn_config(struct comedi_device *dev,
491                                  struct comedi_subdevice *s,
492                                  struct comedi_insn *insn,
493                                  unsigned int *data)
494 {
495         int ret;
496 
497         ret = comedi_dio_insn_config(dev, s, insn, data, 0);
498         if (ret)
499                 return ret;
500 
501         writel(s->io_bits, dev->mmio + Port_Pin_Directions(0));
502 
503         return insn->n;
504 }
505 
506 static int ni_pcidio_insn_bits(struct comedi_device *dev,
507                                struct comedi_subdevice *s,
508                                struct comedi_insn *insn,
509                                unsigned int *data)
510 {
511         if (comedi_dio_update_state(s, data))
512                 writel(s->state, dev->mmio + Port_IO(0));
513 
514         data[1] = readl(dev->mmio + Port_IO(0));
515 
516         return insn->n;
517 }
518 
519 static int ni_pcidio_ns_to_timer(int *nanosec, unsigned int flags)
520 {
521         int divider, base;
522 
523         base = TIMER_BASE;
524 
525         switch (flags & CMDF_ROUND_MASK) {
526         case CMDF_ROUND_NEAREST:
527         default:
528                 divider = (*nanosec + base / 2) / base;
529                 break;
530         case CMDF_ROUND_DOWN:
531                 divider = (*nanosec) / base;
532                 break;
533         case CMDF_ROUND_UP:
534                 divider = (*nanosec + base - 1) / base;
535                 break;
536         }
537 
538         *nanosec = base * divider;
539         return divider;
540 }
541 
542 static int ni_pcidio_cmdtest(struct comedi_device *dev,
543                              struct comedi_subdevice *s, struct comedi_cmd *cmd)
544 {
545         int err = 0;
546         unsigned int arg;
547 
548         /* Step 1 : check if triggers are trivially valid */
549 
550         err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
551         err |= comedi_check_trigger_src(&cmd->scan_begin_src,
552                                         TRIG_TIMER | TRIG_EXT);
553         err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
554         err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
555         err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
556 
557         if (err)
558                 return 1;
559 
560         /* Step 2a : make sure trigger sources are unique */
561 
562         err |= comedi_check_trigger_is_unique(cmd->start_src);
563         err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
564         err |= comedi_check_trigger_is_unique(cmd->stop_src);
565 
566         /* Step 2b : and mutually compatible */
567 
568         if (err)
569                 return 2;
570 
571         /* Step 3: check if arguments are trivially valid */
572 
573         err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
574 
575 #define MAX_SPEED       (TIMER_BASE)    /* in nanoseconds */
576 
577         if (cmd->scan_begin_src == TRIG_TIMER) {
578                 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
579                                                     MAX_SPEED);
580                 /* no minimum speed */
581         } else {
582                 /* TRIG_EXT */
583                 /* should be level/edge, hi/lo specification here */
584                 if ((cmd->scan_begin_arg & ~(CR_EDGE | CR_INVERT)) != 0) {
585                         cmd->scan_begin_arg &= (CR_EDGE | CR_INVERT);
586                         err |= -EINVAL;
587                 }
588         }
589 
590         err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
591         err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
592                                            cmd->chanlist_len);
593 
594         if (cmd->stop_src == TRIG_COUNT)
595                 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
596         else    /* TRIG_NONE */
597                 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
598 
599         if (err)
600                 return 3;
601 
602         /* step 4: fix up any arguments */
603 
604         if (cmd->scan_begin_src == TRIG_TIMER) {
605                 arg = cmd->scan_begin_arg;
606                 ni_pcidio_ns_to_timer(&arg, cmd->flags);
607                 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
608         }
609 
610         if (err)
611                 return 4;
612 
613         return 0;
614 }
615 
616 static int ni_pcidio_inttrig(struct comedi_device *dev,
617                              struct comedi_subdevice *s,
618                              unsigned int trig_num)
619 {
620         struct nidio96_private *devpriv = dev->private;
621         struct comedi_cmd *cmd = &s->async->cmd;
622 
623         if (trig_num != cmd->start_arg)
624                 return -EINVAL;
625 
626         writeb(devpriv->OpModeBits, dev->mmio + OpMode);
627         s->async->inttrig = NULL;
628 
629         return 1;
630 }
631 
632 static int ni_pcidio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
633 {
634         struct nidio96_private *devpriv = dev->private;
635         struct comedi_cmd *cmd = &s->async->cmd;
636 
637         /* XXX configure ports for input */
638         writel(0x0000, dev->mmio + Port_Pin_Directions(0));
639 
640         if (1) {
641                 /* enable fifos A B C D */
642                 writeb(0x0f, dev->mmio + Data_Path);
643 
644                 /* set transfer width a 32 bits */
645                 writeb(TransferWidth(0) | TransferLength(0),
646                        dev->mmio + Transfer_Size_Control);
647         } else {
648                 writeb(0x03, dev->mmio + Data_Path);
649                 writeb(TransferWidth(3) | TransferLength(0),
650                        dev->mmio + Transfer_Size_Control);
651         }
652 
653         /* protocol configuration */
654         if (cmd->scan_begin_src == TRIG_TIMER) {
655                 /* page 4-5, "input with internal REQs" */
656                 writeb(0, dev->mmio + OpMode);
657                 writeb(0x00, dev->mmio + ClockReg);
658                 writeb(1, dev->mmio + Sequence);
659                 writeb(0x04, dev->mmio + ReqReg);
660                 writeb(4, dev->mmio + BlockMode);
661                 writeb(3, dev->mmio + LinePolarities);
662                 writeb(0xc0, dev->mmio + AckSer);
663                 writel(ni_pcidio_ns_to_timer(&cmd->scan_begin_arg,
664                                              CMDF_ROUND_NEAREST),
665                        dev->mmio + StartDelay);
666                 writeb(1, dev->mmio + ReqDelay);
667                 writeb(1, dev->mmio + ReqNotDelay);
668                 writeb(1, dev->mmio + AckDelay);
669                 writeb(0x0b, dev->mmio + AckNotDelay);
670                 writeb(0x01, dev->mmio + Data1Delay);
671                 /* manual, page 4-5: ClockSpeed comment is incorrectly listed
672                  * on DAQOptions */
673                 writew(0, dev->mmio + ClockSpeed);
674                 writeb(0, dev->mmio + DAQOptions);
675         } else {
676                 /* TRIG_EXT */
677                 /* page 4-5, "input with external REQs" */
678                 writeb(0, dev->mmio + OpMode);
679                 writeb(0x00, dev->mmio + ClockReg);
680                 writeb(0, dev->mmio + Sequence);
681                 writeb(0x00, dev->mmio + ReqReg);
682                 writeb(4, dev->mmio + BlockMode);
683                 if (!(cmd->scan_begin_arg & CR_INVERT)) /* Leading Edge */
684                         writeb(0, dev->mmio + LinePolarities);
685                 else                                    /* Trailing Edge */
686                         writeb(2, dev->mmio + LinePolarities);
687                 writeb(0x00, dev->mmio + AckSer);
688                 writel(1, dev->mmio + StartDelay);
689                 writeb(1, dev->mmio + ReqDelay);
690                 writeb(1, dev->mmio + ReqNotDelay);
691                 writeb(1, dev->mmio + AckDelay);
692                 writeb(0x0C, dev->mmio + AckNotDelay);
693                 writeb(0x10, dev->mmio + Data1Delay);
694                 writew(0, dev->mmio + ClockSpeed);
695                 writeb(0x60, dev->mmio + DAQOptions);
696         }
697 
698         if (cmd->stop_src == TRIG_COUNT) {
699                 writel(cmd->stop_arg,
700                        dev->mmio + Transfer_Count);
701         } else {
702                 /* XXX */
703         }
704 
705 #ifdef USE_DMA
706         writeb(ClearPrimaryTC | ClearSecondaryTC,
707                dev->mmio + Group_1_First_Clear);
708 
709         {
710                 int retval = setup_mite_dma(dev, s);
711 
712                 if (retval)
713                         return retval;
714         }
715 #else
716         writeb(0x00, dev->mmio + DMA_Line_Control_Group1);
717 #endif
718         writeb(0x00, dev->mmio + DMA_Line_Control_Group2);
719 
720         /* clear and enable interrupts */
721         writeb(0xff, dev->mmio + Group_1_First_Clear);
722         /* writeb(ClearExpired, dev->mmio+Group_1_Second_Clear); */
723 
724         writeb(IntEn, dev->mmio + Interrupt_Control);
725         writeb(0x03, dev->mmio + Master_DMA_And_Interrupt_Control);
726 
727         if (cmd->stop_src == TRIG_NONE) {
728                 devpriv->OpModeBits = DataLatching(0) | RunMode(7);
729         } else {                /* TRIG_TIMER */
730                 devpriv->OpModeBits = Numbered | RunMode(7);
731         }
732         if (cmd->start_src == TRIG_NOW) {
733                 /* start */
734                 writeb(devpriv->OpModeBits, dev->mmio + OpMode);
735                 s->async->inttrig = NULL;
736         } else {
737                 /* TRIG_INT */
738                 s->async->inttrig = ni_pcidio_inttrig;
739         }
740 
741         return 0;
742 }
743 
744 static int ni_pcidio_cancel(struct comedi_device *dev,
745                             struct comedi_subdevice *s)
746 {
747         writeb(0x00, dev->mmio + Master_DMA_And_Interrupt_Control);
748         ni_pcidio_release_di_mite_channel(dev);
749 
750         return 0;
751 }
752 
753 static int ni_pcidio_change(struct comedi_device *dev,
754                             struct comedi_subdevice *s)
755 {
756         struct nidio96_private *devpriv = dev->private;
757         int ret;
758 
759         ret = mite_buf_change(devpriv->di_mite_ring, s);
760         if (ret < 0)
761                 return ret;
762 
763         memset(s->async->prealloc_buf, 0xaa, s->async->prealloc_bufsz);
764 
765         return 0;
766 }
767 
768 static int pci_6534_load_fpga(struct comedi_device *dev,
769                               const u8 *data, size_t data_len,
770                               unsigned long context)
771 {
772         static const int timeout = 1000;
773         int fpga_index = context;
774         int i;
775         size_t j;
776 
777         writew(0x80 | fpga_index, dev->mmio + Firmware_Control_Register);
778         writew(0xc0 | fpga_index, dev->mmio + Firmware_Control_Register);
779         for (i = 0;
780              (readw(dev->mmio + Firmware_Status_Register) & 0x2) == 0 &&
781              i < timeout; ++i) {
782                 udelay(1);
783         }
784         if (i == timeout) {
785                 dev_warn(dev->class_dev,
786                          "ni_pcidio: failed to load fpga %i, waiting for status 0x2\n",
787                          fpga_index);
788                 return -EIO;
789         }
790         writew(0x80 | fpga_index, dev->mmio + Firmware_Control_Register);
791         for (i = 0;
792              readw(dev->mmio + Firmware_Status_Register) != 0x3 &&
793              i < timeout; ++i) {
794                 udelay(1);
795         }
796         if (i == timeout) {
797                 dev_warn(dev->class_dev,
798                          "ni_pcidio: failed to load fpga %i, waiting for status 0x3\n",
799                          fpga_index);
800                 return -EIO;
801         }
802         for (j = 0; j + 1 < data_len;) {
803                 unsigned int value = data[j++];
804 
805                 value |= data[j++] << 8;
806                 writew(value, dev->mmio + Firmware_Data_Register);
807                 for (i = 0;
808                      (readw(dev->mmio + Firmware_Status_Register) & 0x2) == 0
809                      && i < timeout; ++i) {
810                         udelay(1);
811                 }
812                 if (i == timeout) {
813                         dev_warn(dev->class_dev,
814                                  "ni_pcidio: failed to load word into fpga %i\n",
815                                  fpga_index);
816                         return -EIO;
817                 }
818                 if (need_resched())
819                         schedule();
820         }
821         writew(0x0, dev->mmio + Firmware_Control_Register);
822         return 0;
823 }
824 
825 static int pci_6534_reset_fpga(struct comedi_device *dev, int fpga_index)
826 {
827         return pci_6534_load_fpga(dev, NULL, 0, fpga_index);
828 }
829 
830 static int pci_6534_reset_fpgas(struct comedi_device *dev)
831 {
832         int ret;
833         int i;
834 
835         writew(0x0, dev->mmio + Firmware_Control_Register);
836         for (i = 0; i < 3; ++i) {
837                 ret = pci_6534_reset_fpga(dev, i);
838                 if (ret < 0)
839                         break;
840         }
841         writew(0x0, dev->mmio + Firmware_Mask_Register);
842         return ret;
843 }
844 
845 static void pci_6534_init_main_fpga(struct comedi_device *dev)
846 {
847         writel(0, dev->mmio + FPGA_Control1_Register);
848         writel(0, dev->mmio + FPGA_Control2_Register);
849         writel(0, dev->mmio + FPGA_SCALS_Counter_Register);
850         writel(0, dev->mmio + FPGA_SCAMS_Counter_Register);
851         writel(0, dev->mmio + FPGA_SCBLS_Counter_Register);
852         writel(0, dev->mmio + FPGA_SCBMS_Counter_Register);
853 }
854 
855 static int pci_6534_upload_firmware(struct comedi_device *dev)
856 {
857         struct nidio96_private *devpriv = dev->private;
858         static const char *const fw_file[3] = {
859                 FW_PCI_6534_SCARAB_DI,  /* loaded into scarab A for DI */
860                 FW_PCI_6534_SCARAB_DO,  /* loaded into scarab B for DO */
861                 FW_PCI_6534_MAIN,       /* loaded into main FPGA */
862         };
863         int ret;
864         int n;
865 
866         ret = pci_6534_reset_fpgas(dev);
867         if (ret < 0)
868                 return ret;
869         /* load main FPGA first, then the two scarabs */
870         for (n = 2; n >= 0; n--) {
871                 ret = comedi_load_firmware(dev, &devpriv->mite->pcidev->dev,
872                                            fw_file[n],
873                                            pci_6534_load_fpga, n);
874                 if (ret == 0 && n == 2)
875                         pci_6534_init_main_fpga(dev);
876                 if (ret < 0)
877                         break;
878         }
879         return ret;
880 }
881 
882 static void nidio_reset_board(struct comedi_device *dev)
883 {
884         writel(0, dev->mmio + Port_IO(0));
885         writel(0, dev->mmio + Port_Pin_Directions(0));
886         writel(0, dev->mmio + Port_Pin_Mask(0));
887 
888         /* disable interrupts on board */
889         writeb(0, dev->mmio + Master_DMA_And_Interrupt_Control);
890 }
891 
892 static int nidio_auto_attach(struct comedi_device *dev,
893                              unsigned long context)
894 {
895         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
896         const struct nidio_board *board = NULL;
897         struct nidio96_private *devpriv;
898         struct comedi_subdevice *s;
899         int ret;
900         unsigned int irq;
901 
902         if (context < ARRAY_SIZE(nidio_boards))
903                 board = &nidio_boards[context];
904         if (!board)
905                 return -ENODEV;
906         dev->board_ptr = board;
907         dev->board_name = board->name;
908 
909         ret = comedi_pci_enable(dev);
910         if (ret)
911                 return ret;
912 
913         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
914         if (!devpriv)
915                 return -ENOMEM;
916 
917         spin_lock_init(&devpriv->mite_channel_lock);
918 
919         devpriv->mite = mite_alloc(pcidev);
920         if (!devpriv->mite)
921                 return -ENOMEM;
922 
923         ret = mite_setup(dev, devpriv->mite);
924         if (ret < 0)
925                 return ret;
926 
927         devpriv->di_mite_ring = mite_alloc_ring(devpriv->mite);
928         if (!devpriv->di_mite_ring)
929                 return -ENOMEM;
930 
931         if (board->uses_firmware) {
932                 ret = pci_6534_upload_firmware(dev);
933                 if (ret < 0)
934                         return ret;
935         }
936 
937         nidio_reset_board(dev);
938 
939         ret = comedi_alloc_subdevices(dev, 1);
940         if (ret)
941                 return ret;
942 
943         dev_info(dev->class_dev, "%s rev=%d\n", dev->board_name,
944                  readb(dev->mmio + Chip_Version));
945 
946         s = &dev->subdevices[0];
947 
948         dev->read_subdev = s;
949         s->type = COMEDI_SUBD_DIO;
950         s->subdev_flags =
951                 SDF_READABLE | SDF_WRITABLE | SDF_LSAMPL | SDF_PACKED |
952                 SDF_CMD_READ;
953         s->n_chan = 32;
954         s->range_table = &range_digital;
955         s->maxdata = 1;
956         s->insn_config = &ni_pcidio_insn_config;
957         s->insn_bits = &ni_pcidio_insn_bits;
958         s->do_cmd = &ni_pcidio_cmd;
959         s->do_cmdtest = &ni_pcidio_cmdtest;
960         s->cancel = &ni_pcidio_cancel;
961         s->len_chanlist = 32;   /* XXX */
962         s->buf_change = &ni_pcidio_change;
963         s->async_dma_dir = DMA_BIDIRECTIONAL;
964         s->poll = &ni_pcidio_poll;
965 
966         irq = pcidev->irq;
967         if (irq) {
968                 ret = request_irq(irq, nidio_interrupt, IRQF_SHARED,
969                                   dev->board_name, dev);
970                 if (ret == 0)
971                         dev->irq = irq;
972         }
973 
974         return 0;
975 }
976 
977 static void nidio_detach(struct comedi_device *dev)
978 {
979         struct nidio96_private *devpriv = dev->private;
980 
981         if (dev->irq)
982                 free_irq(dev->irq, dev);
983         if (devpriv) {
984                 if (devpriv->di_mite_ring) {
985                         mite_free_ring(devpriv->di_mite_ring);
986                         devpriv->di_mite_ring = NULL;
987                 }
988                 mite_detach(devpriv->mite);
989         }
990         if (dev->mmio)
991                 iounmap(dev->mmio);
992         comedi_pci_disable(dev);
993 }
994 
995 static struct comedi_driver ni_pcidio_driver = {
996         .driver_name    = "ni_pcidio",
997         .module         = THIS_MODULE,
998         .auto_attach    = nidio_auto_attach,
999         .detach         = nidio_detach,
1000 };
1001 
1002 static int ni_pcidio_pci_probe(struct pci_dev *dev,
1003                                const struct pci_device_id *id)
1004 {
1005         return comedi_pci_auto_config(dev, &ni_pcidio_driver, id->driver_data);
1006 }
1007 
1008 static const struct pci_device_id ni_pcidio_pci_table[] = {
1009         { PCI_VDEVICE(NI, 0x1150), BOARD_PCIDIO_32HS },
1010         { PCI_VDEVICE(NI, 0x12b0), BOARD_PCI6534 },
1011         { PCI_VDEVICE(NI, 0x1320), BOARD_PXI6533 },
1012         { 0 }
1013 };
1014 MODULE_DEVICE_TABLE(pci, ni_pcidio_pci_table);
1015 
1016 static struct pci_driver ni_pcidio_pci_driver = {
1017         .name           = "ni_pcidio",
1018         .id_table       = ni_pcidio_pci_table,
1019         .probe          = ni_pcidio_pci_probe,
1020         .remove         = comedi_pci_auto_unconfig,
1021 };
1022 module_comedi_pci_driver(ni_pcidio_driver, ni_pcidio_pci_driver);
1023 
1024 MODULE_AUTHOR("Comedi http://www.comedi.org");
1025 MODULE_DESCRIPTION("Comedi low-level driver");
1026 MODULE_LICENSE("GPL");
1027 

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