3 Sensoray s626 Comedi driver
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 Based on Sensoray Model 626 Linux driver Version 0.2
9 Copyright (C) 2002-2004 Sensoray Co., Inc.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 Description: Sensoray 626 driver
30 Devices: [Sensoray] 626 (s626)
31 Authors: Gianluca Palli <gpalli@deis.unibo.it>,
32 Updated: Fri, 15 Feb 2008 10:28:42 +0000
35 Configuration options:
36 [0] - PCI bus of device (optional)
37 [1] - PCI slot of device (optional)
38 If bus/slot is not specified, the first supported
39 PCI device found will be used.
41 INSN_CONFIG instructions:
49 s626 has 3 dio subdevices (2,3 and 4) each with 16 i/o channels
50 supported configuration options:
56 Every channel must be configured before reading.
60 insn.insn=INSN_CONFIG; //configuration instruction
61 insn.n=1; //number of operation (must be 1)
62 insn.data=&initialvalue; //initial value loaded into encoder
63 //during configuration
64 insn.subdev=5; //encoder subdevice
65 insn.chanspec=CR_PACK(encoder_channel,0,AREF_OTHER); //encoder_channel
68 comedi_do_insn(cf,&insn); //executing configuration
71 #include <linux/interrupt.h>
72 #include <linux/kernel.h>
73 #include <linux/types.h>
75 #include "../comedidev.h"
77 #include "comedi_fc.h"
80 #define PCI_VENDOR_ID_S626 0x1131
81 #define PCI_DEVICE_ID_S626 0x7146
82 #define PCI_SUBVENDOR_ID_S626 0x6000
83 #define PCI_SUBDEVICE_ID_S626 0x0272
100 static const struct s626_board s626_boards[] = {
103 .vendor_id = PCI_VENDOR_ID_S626,
104 .device_id = PCI_DEVICE_ID_S626,
105 .subvendor_id = PCI_SUBVENDOR_ID_S626,
106 .subdevice_id = PCI_SUBDEVICE_ID_S626,
107 .ai_chans = S626_ADC_CHANNELS,
109 .ao_chans = S626_DAC_CHANNELS,
111 .dio_chans = S626_DIO_CHANNELS,
112 .dio_banks = S626_DIO_BANKS,
113 .enc_chans = S626_ENCODER_CHANNELS,
117 #define thisboard ((const struct s626_board *)dev->board_ptr)
119 struct s626_private {
120 struct pci_dev *pdev;
121 void __iomem *base_addr;
124 uint8_t ai_cmd_running; /* ai_cmd is running */
125 uint8_t ai_continous; /* continous acquisition */
126 int ai_sample_count; /* number of samples to acquire */
127 unsigned int ai_sample_timer;
128 /* time between samples in units of the timer */
129 int ai_convert_count; /* conversion counter */
130 unsigned int ai_convert_timer;
131 /* time between conversion in units of the timer */
132 uint16_t CounterIntEnabs;
133 /* Counter interrupt enable mask for MISC2 register. */
134 uint8_t AdcItems; /* Number of items in ADC poll list. */
135 struct bufferDMA RPSBuf; /* DMA buffer used to hold ADC (RPS1) program. */
136 struct bufferDMA ANABuf;
137 /* DMA buffer used to receive ADC data and hold DAC data. */
139 /* Pointer to logical adrs of DMA buffer used to hold DAC data. */
140 uint16_t Dacpol; /* Image of DAC polarity register. */
141 uint8_t TrimSetpoint[12]; /* Images of TrimDAC setpoints */
142 uint16_t ChargeEnabled; /* Image of MISC2 Battery */
143 /* Charge Enabled (0 or WRMISC2_CHARGE_ENABLE). */
144 uint16_t WDInterval; /* Image of MISC2 watchdog interval control bits. */
146 /* I2C device address for onboard EEPROM (board rev dependent). */
148 unsigned int ao_readback[S626_DAC_CHANNELS];
163 static struct dio_private dio_private_A = {
165 .WRDOut = LP_WRDOUTA,
166 .RDEdgSel = LP_RDEDGSELA,
167 .WREdgSel = LP_WREDGSELA,
168 .RDCapSel = LP_RDCAPSELA,
169 .WRCapSel = LP_WRCAPSELA,
170 .RDCapFlg = LP_RDCAPFLGA,
171 .RDIntSel = LP_RDINTSELA,
172 .WRIntSel = LP_WRINTSELA,
175 static struct dio_private dio_private_B = {
177 .WRDOut = LP_WRDOUTB,
178 .RDEdgSel = LP_RDEDGSELB,
179 .WREdgSel = LP_WREDGSELB,
180 .RDCapSel = LP_RDCAPSELB,
181 .WRCapSel = LP_WRCAPSELB,
182 .RDCapFlg = LP_RDCAPFLGB,
183 .RDIntSel = LP_RDINTSELB,
184 .WRIntSel = LP_WRINTSELB,
187 static struct dio_private dio_private_C = {
189 .WRDOut = LP_WRDOUTC,
190 .RDEdgSel = LP_RDEDGSELC,
191 .WREdgSel = LP_WREDGSELC,
192 .RDCapSel = LP_RDCAPSELC,
193 .WRCapSel = LP_WRCAPSELC,
194 .RDCapFlg = LP_RDCAPFLGC,
195 .RDIntSel = LP_RDINTSELC,
196 .WRIntSel = LP_WRINTSELC,
199 /* to group dio devices (48 bits mask and data are not allowed ???)
200 static struct dio_private *dio_private_word[]={
207 #define devpriv ((struct s626_private *)dev->private)
208 #define diopriv ((struct dio_private *)s->private)
210 /* COUNTER OBJECT ------------------------------------------------ */
212 /* Pointers to functions that differ for A and B counters: */
213 uint16_t(*GetEnable) (struct comedi_device *dev, struct enc_private *); /* Return clock enable. */
214 uint16_t(*GetIntSrc) (struct comedi_device *dev, struct enc_private *); /* Return interrupt source. */
215 uint16_t(*GetLoadTrig) (struct comedi_device *dev, struct enc_private *); /* Return preload trigger source. */
216 uint16_t(*GetMode) (struct comedi_device *dev, struct enc_private *); /* Return standardized operating mode. */
217 void (*PulseIndex) (struct comedi_device *dev, struct enc_private *); /* Generate soft index strobe. */
218 void (*SetEnable) (struct comedi_device *dev, struct enc_private *, uint16_t enab); /* Program clock enable. */
219 void (*SetIntSrc) (struct comedi_device *dev, struct enc_private *, uint16_t IntSource); /* Program interrupt source. */
220 void (*SetLoadTrig) (struct comedi_device *dev, struct enc_private *, uint16_t Trig); /* Program preload trigger source. */
221 void (*SetMode) (struct comedi_device *dev, struct enc_private *, uint16_t Setup, uint16_t DisableIntSrc); /* Program standardized operating mode. */
222 void (*ResetCapFlags) (struct comedi_device *dev, struct enc_private *); /* Reset event capture flags. */
224 uint16_t MyCRA; /* Address of CRA register. */
225 uint16_t MyCRB; /* Address of CRB register. */
226 uint16_t MyLatchLsw; /* Address of Latch least-significant-word */
228 uint16_t MyEventBits[4]; /* Bit translations for IntSrc -->RDMISC2. */
231 #define encpriv ((struct enc_private *)(dev->subdevices+5)->private)
233 /* Counter overflow/index event flag masks for RDMISC2. */
234 #define INDXMASK(C) (1 << (((C) > 2) ? ((C) * 2 - 1) : ((C) * 2 + 4)))
235 #define OVERMASK(C) (1 << (((C) > 2) ? ((C) * 2 + 5) : ((C) * 2 + 10)))
236 #define EVBITS(C) { 0, OVERMASK(C), INDXMASK(C), OVERMASK(C) | INDXMASK(C) }
238 /* Translation table to map IntSrc into equivalent RDMISC2 event flag bits. */
239 /* static const uint16_t EventBits[][4] = { EVBITS(0), EVBITS(1), EVBITS(2), EVBITS(3), EVBITS(4), EVBITS(5) }; */
241 /* enab/disable a function or test status bit(s) that are accessed */
242 /* through Main Control Registers 1 or 2. */
243 #define MC_ENABLE(REGADRS, CTRLWORD) writel(((uint32_t)(CTRLWORD) << 16) | (uint32_t)(CTRLWORD), devpriv->base_addr+(REGADRS))
245 #define MC_DISABLE(REGADRS, CTRLWORD) writel((uint32_t)(CTRLWORD) << 16 , devpriv->base_addr+(REGADRS))
247 #define MC_TEST(REGADRS, CTRLWORD) ((readl(devpriv->base_addr+(REGADRS)) & CTRLWORD) != 0)
249 /* #define WR7146(REGARDS,CTRLWORD)
250 writel(CTRLWORD,(uint32_t)(devpriv->base_addr+(REGARDS))) */
251 #define WR7146(REGARDS, CTRLWORD) writel(CTRLWORD, devpriv->base_addr+(REGARDS))
253 /* #define RR7146(REGARDS)
254 readl((uint32_t)(devpriv->base_addr+(REGARDS))) */
255 #define RR7146(REGARDS) readl(devpriv->base_addr+(REGARDS))
257 #define BUGFIX_STREG(REGADRS) (REGADRS - 4)
259 /* Write a time slot control record to TSL2. */
260 #define VECTPORT(VECTNUM) (P_TSL2 + ((VECTNUM) << 2))
261 #define SETVECT(VECTNUM, VECTVAL) WR7146(VECTPORT(VECTNUM), (VECTVAL))
263 /* Code macros used for constructing I2C command bytes. */
264 #define I2C_B2(ATTR, VAL) (((ATTR) << 6) | ((VAL) << 24))
265 #define I2C_B1(ATTR, VAL) (((ATTR) << 4) | ((VAL) << 16))
266 #define I2C_B0(ATTR, VAL) (((ATTR) << 2) | ((VAL) << 8))
268 static const struct comedi_lrange s626_range_table = { 2, {
274 /* Execute a DEBI transfer. This must be called from within a */
275 /* critical section. */
276 static void DEBItransfer(struct comedi_device *dev)
278 /* Initiate upload of shadow RAM to DEBI control register. */
279 MC_ENABLE(P_MC2, MC2_UPLD_DEBI);
281 /* Wait for completion of upload from shadow RAM to DEBI control */
283 while (!MC_TEST(P_MC2, MC2_UPLD_DEBI))
286 /* Wait until DEBI transfer is done. */
287 while (RR7146(P_PSR) & PSR_DEBI_S)
291 /* Initialize the DEBI interface for all transfers. */
293 static uint16_t DEBIread(struct comedi_device *dev, uint16_t addr)
297 /* Set up DEBI control register value in shadow RAM. */
298 WR7146(P_DEBICMD, DEBI_CMD_RDWORD | addr);
300 /* Execute the DEBI transfer. */
303 /* Fetch target register value. */
304 retval = (uint16_t) RR7146(P_DEBIAD);
306 /* Return register value. */
310 /* Write a value to a gate array register. */
311 static void DEBIwrite(struct comedi_device *dev, uint16_t addr, uint16_t wdata)
314 /* Set up DEBI control register value in shadow RAM. */
315 WR7146(P_DEBICMD, DEBI_CMD_WRWORD | addr);
316 WR7146(P_DEBIAD, wdata);
318 /* Execute the DEBI transfer. */
322 /* Replace the specified bits in a gate array register. Imports: mask
323 * specifies bits that are to be preserved, wdata is new value to be
324 * or'd with the masked original.
326 static void DEBIreplace(struct comedi_device *dev, uint16_t addr, uint16_t mask,
330 /* Copy target gate array register into P_DEBIAD register. */
331 WR7146(P_DEBICMD, DEBI_CMD_RDWORD | addr);
332 /* Set up DEBI control reg value in shadow RAM. */
333 DEBItransfer(dev); /* Execute the DEBI Read transfer. */
335 /* Write back the modified image. */
336 WR7146(P_DEBICMD, DEBI_CMD_WRWORD | addr);
337 /* Set up DEBI control reg value in shadow RAM. */
339 WR7146(P_DEBIAD, wdata | ((uint16_t) RR7146(P_DEBIAD) & mask));
340 /* Modify the register image. */
341 DEBItransfer(dev); /* Execute the DEBI Write transfer. */
344 /* ************** EEPROM ACCESS FUNCTIONS ************** */
346 static uint32_t I2Chandshake(struct comedi_device *dev, uint32_t val)
348 /* Write I2C command to I2C Transfer Control shadow register. */
349 WR7146(P_I2CCTRL, val);
351 /* Upload I2C shadow registers into working registers and wait for */
352 /* upload confirmation. */
354 MC_ENABLE(P_MC2, MC2_UPLD_IIC);
355 while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
358 /* Wait until I2C bus transfer is finished or an error occurs. */
359 while ((RR7146(P_I2CCTRL) & (I2C_BUSY | I2C_ERR)) == I2C_BUSY)
362 /* Return non-zero if I2C error occurred. */
363 return RR7146(P_I2CCTRL) & I2C_ERR;
367 /* Read uint8_t from EEPROM. */
368 static uint8_t I2Cread(struct comedi_device *dev, uint8_t addr)
372 /* Send EEPROM target address. */
373 if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CW)
374 /* Byte2 = I2C command: write to I2C EEPROM device. */
375 | I2C_B1(I2C_ATTRSTOP, addr)
376 /* Byte1 = EEPROM internal target address. */
377 | I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
378 /* Abort function and declare error if handshake failed. */
381 /* Execute EEPROM read. */
382 if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CR)
386 /* from I2C EEPROM */
388 |I2C_B1(I2C_ATTRSTOP, 0)
393 |I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
395 /* Abort function and declare error if handshake failed. */
398 /* Return copy of EEPROM value. */
399 rtnval = (uint8_t) (RR7146(P_I2CCTRL) >> 16);
403 /* *********** DAC FUNCTIONS *********** */
405 /* Slot 0 base settings. */
406 #define VECT0 (XSD2 | RSD3 | SIB_A2)
407 /* Slot 0 always shifts in 0xFF and store it to FB_BUFFER2. */
409 /* TrimDac LogicalChan-to-PhysicalChan mapping table. */
410 static uint8_t trimchan[] = { 10, 9, 8, 3, 2, 7, 6, 1, 0, 5, 4 };
412 /* TrimDac LogicalChan-to-EepromAdrs mapping table. */
413 static uint8_t trimadrs[] = { 0x40, 0x41, 0x42, 0x50, 0x51, 0x52, 0x53, 0x60, 0x61, 0x62, 0x63 };
415 /* Private helper function: Transmit serial data to DAC via Audio
416 * channel 2. Assumes: (1) TSL2 slot records initialized, and (2)
417 * Dacpol contains valid target image.
419 static void SendDAC(struct comedi_device *dev, uint32_t val)
422 /* START THE SERIAL CLOCK RUNNING ------------- */
424 /* Assert DAC polarity control and enable gating of DAC serial clock
425 * and audio bit stream signals. At this point in time we must be
426 * assured of being in time slot 0. If we are not in slot 0, the
427 * serial clock and audio stream signals will be disabled; this is
428 * because the following DEBIwrite statement (which enables signals
429 * to be passed through the gate array) would execute before the
430 * trailing edge of WS1/WS3 (which turns off the signals), thus
431 * causing the signals to be inactive during the DAC write.
433 DEBIwrite(dev, LP_DACPOL, devpriv->Dacpol);
435 /* TRANSFER OUTPUT DWORD VALUE INTO A2'S OUTPUT FIFO ---------------- */
437 /* Copy DAC setpoint value to DAC's output DMA buffer. */
439 /* WR7146( (uint32_t)devpriv->pDacWBuf, val ); */
440 *devpriv->pDacWBuf = val;
442 /* enab the output DMA transfer. This will cause the DMAC to copy
443 * the DAC's data value to A2's output FIFO. The DMA transfer will
444 * then immediately terminate because the protection address is
445 * reached upon transfer of the first DWORD value.
447 MC_ENABLE(P_MC1, MC1_A2OUT);
449 /* While the DMA transfer is executing ... */
451 /* Reset Audio2 output FIFO's underflow flag (along with any other
452 * FIFO underflow/overflow flags). When set, this flag will
453 * indicate that we have emerged from slot 0.
455 WR7146(P_ISR, ISR_AFOU);
457 /* Wait for the DMA transfer to finish so that there will be data
458 * available in the FIFO when time slot 1 tries to transfer a DWORD
459 * from the FIFO to the output buffer register. We test for DMA
460 * Done by polling the DMAC enable flag; this flag is automatically
461 * cleared when the transfer has finished.
463 while ((RR7146(P_MC1) & MC1_A2OUT) != 0)
466 /* START THE OUTPUT STREAM TO THE TARGET DAC -------------------- */
468 /* FIFO data is now available, so we enable execution of time slots
469 * 1 and higher by clearing the EOS flag in slot 0. Note that SD3
470 * will be shifted in and stored in FB_BUFFER2 for end-of-slot-list
473 SETVECT(0, XSD2 | RSD3 | SIB_A2);
475 /* Wait for slot 1 to execute to ensure that the Packet will be
476 * transmitted. This is detected by polling the Audio2 output FIFO
477 * underflow flag, which will be set when slot 1 execution has
478 * finished transferring the DAC's data DWORD from the output FIFO
479 * to the output buffer register.
481 while ((RR7146(P_SSR) & SSR_AF2_OUT) == 0)
484 /* Set up to trap execution at slot 0 when the TSL sequencer cycles
485 * back to slot 0 after executing the EOS in slot 5. Also,
486 * simultaneously shift out and in the 0x00 that is ALWAYS the value
487 * stored in the last byte to be shifted out of the FIFO's DWORD
490 SETVECT(0, XSD2 | XFIFO_2 | RSD2 | SIB_A2 | EOS);
492 /* WAIT FOR THE TRANSACTION TO FINISH ----------------------- */
494 /* Wait for the TSL to finish executing all time slots before
495 * exiting this function. We must do this so that the next DAC
496 * write doesn't start, thereby enabling clock/chip select signals:
498 * 1. Before the TSL sequence cycles back to slot 0, which disables
499 * the clock/cs signal gating and traps slot // list execution.
500 * we have not yet finished slot 5 then the clock/cs signals are
501 * still gated and we have not finished transmitting the stream.
503 * 2. While slots 2-5 are executing due to a late slot 0 trap. In
504 * this case, the slot sequence is currently repeating, but with
505 * clock/cs signals disabled. We must wait for slot 0 to trap
506 * execution before setting up the next DAC setpoint DMA transfer
507 * and enabling the clock/cs signals. To detect the end of slot 5,
508 * we test for the FB_BUFFER2 MSB contents to be equal to 0xFF. If
509 * the TSL has not yet finished executing slot 5 ...
511 if ((RR7146(P_FB_BUFFER2) & 0xFF000000) != 0) {
512 /* The trap was set on time and we are still executing somewhere
513 * in slots 2-5, so we now wait for slot 0 to execute and trap
514 * TSL execution. This is detected when FB_BUFFER2 MSB changes
515 * from 0xFF to 0x00, which slot 0 causes to happen by shifting
516 * out/in on SD2 the 0x00 that is always referenced by slot 5.
518 while ((RR7146(P_FB_BUFFER2) & 0xFF000000) != 0)
521 /* Either (1) we were too late setting the slot 0 trap; the TSL
522 * sequencer restarted slot 0 before we could set the EOS trap flag,
523 * or (2) we were not late and execution is now trapped at slot 0.
524 * In either case, we must now change slot 0 so that it will store
525 * value 0xFF (instead of 0x00) to FB_BUFFER2 next time it executes.
526 * In order to do this, we reprogram slot 0 so that it will shift in
527 * SD3, which is driven only by a pull-up resistor.
529 SETVECT(0, RSD3 | SIB_A2 | EOS);
531 /* Wait for slot 0 to execute, at which time the TSL is setup for
532 * the next DAC write. This is detected when FB_BUFFER2 MSB changes
535 while ((RR7146(P_FB_BUFFER2) & 0xFF000000) == 0)
539 /* Private helper function: Write setpoint to an application DAC channel. */
540 static void SetDAC(struct comedi_device *dev, uint16_t chan, short dacdata)
542 register uint16_t signmask;
543 register uint32_t WSImage;
545 /* Adjust DAC data polarity and set up Polarity Control Register */
547 signmask = 1 << chan;
550 devpriv->Dacpol |= signmask;
552 devpriv->Dacpol &= ~signmask;
554 /* Limit DAC setpoint value to valid range. */
555 if ((uint16_t) dacdata > 0x1FFF)
558 /* Set up TSL2 records (aka "vectors") for DAC update. Vectors V2
559 * and V3 transmit the setpoint to the target DAC. V4 and V5 send
560 * data to a non-existent TrimDac channel just to keep the clock
561 * running after sending data to the target DAC. This is necessary
562 * to eliminate the clock glitch that would otherwise occur at the
563 * end of the target DAC's serial data stream. When the sequence
564 * restarts at V0 (after executing V5), the gate array automatically
565 * disables gating for the DAC clock and all DAC chip selects.
568 WSImage = (chan & 2) ? WS1 : WS2;
569 /* Choose DAC chip select to be asserted. */
570 SETVECT(2, XSD2 | XFIFO_1 | WSImage);
571 /* Slot 2: Transmit high data byte to target DAC. */
572 SETVECT(3, XSD2 | XFIFO_0 | WSImage);
573 /* Slot 3: Transmit low data byte to target DAC. */
574 SETVECT(4, XSD2 | XFIFO_3 | WS3);
575 /* Slot 4: Transmit to non-existent TrimDac channel to keep clock */
576 SETVECT(5, XSD2 | XFIFO_2 | WS3 | EOS);
577 /* Slot 5: running after writing target DAC's low data byte. */
579 /* Construct and transmit target DAC's serial packet:
580 * ( A10D DDDD ),( DDDD DDDD ),( 0x0F ),( 0x00 ) where A is chan<0>,
581 * and D<12:0> is the DAC setpoint. Append a WORD value (that writes
582 * to a non-existent TrimDac channel) that serves to keep the clock
583 * running after the packet has been sent to the target DAC.
585 SendDAC(dev, 0x0F000000
586 /* Continue clock after target DAC data (write to non-existent trimdac). */
588 /* Address the two main dual-DAC devices (TSL's chip select enables
590 | ((uint32_t) (chan & 1) << 15)
591 /* Address the DAC channel within the device. */
592 | (uint32_t) dacdata); /* Include DAC setpoint data. */
596 static void WriteTrimDAC(struct comedi_device *dev, uint8_t LogicalChan,
601 /* Save the new setpoint in case the application needs to read it back later. */
602 devpriv->TrimSetpoint[LogicalChan] = (uint8_t) DacData;
604 /* Map logical channel number to physical channel number. */
605 chan = (uint32_t) trimchan[LogicalChan];
607 /* Set up TSL2 records for TrimDac write operation. All slots shift
608 * 0xFF in from pulled-up SD3 so that the end of the slot sequence
612 SETVECT(2, XSD2 | XFIFO_1 | WS3);
613 /* Slot 2: Send high uint8_t to target TrimDac. */
614 SETVECT(3, XSD2 | XFIFO_0 | WS3);
615 /* Slot 3: Send low uint8_t to target TrimDac. */
616 SETVECT(4, XSD2 | XFIFO_3 | WS1);
617 /* Slot 4: Send NOP high uint8_t to DAC0 to keep clock running. */
618 SETVECT(5, XSD2 | XFIFO_2 | WS1 | EOS);
619 /* Slot 5: Send NOP low uint8_t to DAC0. */
621 /* Construct and transmit target DAC's serial packet:
622 * ( 0000 AAAA ), ( DDDD DDDD ),( 0x00 ),( 0x00 ) where A<3:0> is the
623 * DAC channel's address, and D<7:0> is the DAC setpoint. Append a
624 * WORD value (that writes a channel 0 NOP command to a non-existent
625 * main DAC channel) that serves to keep the clock running after the
626 * packet has been sent to the target DAC.
629 /* Address the DAC channel within the trimdac device. */
630 SendDAC(dev, ((uint32_t) chan << 8)
631 | (uint32_t) DacData); /* Include DAC setpoint data. */
634 static void LoadTrimDACs(struct comedi_device *dev)
638 /* Copy TrimDac setpoint values from EEPROM to TrimDacs. */
639 for (i = 0; i < ARRAY_SIZE(trimchan); i++)
640 WriteTrimDAC(dev, i, I2Cread(dev, trimadrs[i]));
643 /* ****** COUNTER FUNCTIONS ******* */
644 /* All counter functions address a specific counter by means of the
645 * "Counter" argument, which is a logical counter number. The Counter
646 * argument may have any of the following legal values: 0=0A, 1=1A,
647 * 2=2A, 3=0B, 4=1B, 5=2B.
650 /* Read a counter's output latch. */
651 static uint32_t ReadLatch(struct comedi_device *dev, struct enc_private *k)
653 register uint32_t value;
655 /* Latch counts and fetch LSW of latched counts value. */
656 value = (uint32_t) DEBIread(dev, k->MyLatchLsw);
658 /* Fetch MSW of latched counts and combine with LSW. */
659 value |= ((uint32_t) DEBIread(dev, k->MyLatchLsw + 2) << 16);
661 /* Return latched counts. */
665 /* Return/set a counter pair's latch trigger source. 0: On read
666 * access, 1: A index latches A, 2: B index latches B, 3: A overflow
669 static void SetLatchSource(struct comedi_device *dev, struct enc_private *k,
672 DEBIreplace(dev, k->MyCRB,
673 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_LATCHSRC)),
674 (uint16_t) (value << CRBBIT_LATCHSRC));
677 /* Write value into counter preload register. */
678 static void Preload(struct comedi_device *dev, struct enc_private *k,
681 DEBIwrite(dev, (uint16_t) (k->MyLatchLsw), (uint16_t) value);
682 DEBIwrite(dev, (uint16_t) (k->MyLatchLsw + 2),
683 (uint16_t) (value >> 16));
686 static unsigned int s626_ai_reg_to_uint(int data)
688 unsigned int tempdata;
690 tempdata = (data >> 18);
691 if (tempdata & 0x2000)
694 tempdata += (1 << 13);
699 /* static unsigned int s626_uint_to_reg(struct comedi_subdevice *s, int data){ */
703 static int s626_dio_set_irq(struct comedi_device *dev, unsigned int chan)
706 unsigned int bitmask;
709 /* select dio bank */
711 bitmask = 1 << (chan - (16 * group));
713 /* set channel to capture positive edge */
714 status = DEBIread(dev,
715 ((struct dio_private *)(dev->subdevices + 2 +
716 group)->private)->RDEdgSel);
718 ((struct dio_private *)(dev->subdevices + 2 +
719 group)->private)->WREdgSel,
722 /* enable interrupt on selected channel */
723 status = DEBIread(dev,
724 ((struct dio_private *)(dev->subdevices + 2 +
725 group)->private)->RDIntSel);
727 ((struct dio_private *)(dev->subdevices + 2 +
728 group)->private)->WRIntSel,
731 /* enable edge capture write command */
732 DEBIwrite(dev, LP_MISC1, MISC1_EDCAP);
734 /* enable edge capture on selected channel */
735 status = DEBIread(dev,
736 ((struct dio_private *)(dev->subdevices + 2 +
737 group)->private)->RDCapSel);
739 ((struct dio_private *)(dev->subdevices + 2 +
740 group)->private)->WRCapSel,
746 static int s626_dio_reset_irq(struct comedi_device *dev, unsigned int group,
749 /* disable edge capture write command */
750 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
752 /* enable edge capture on selected channel */
754 ((struct dio_private *)(dev->subdevices + 2 +
755 group)->private)->WRCapSel, mask);
760 static int s626_dio_clear_irq(struct comedi_device *dev)
764 /* disable edge capture write command */
765 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
767 for (group = 0; group < S626_DIO_BANKS; group++) {
768 /* clear pending events and interrupt */
770 ((struct dio_private *)(dev->subdevices + 2 +
771 group)->private)->WRCapSel,
778 static irqreturn_t s626_irq_handler(int irq, void *d)
780 struct comedi_device *dev = d;
781 struct comedi_subdevice *s;
782 struct comedi_cmd *cmd;
783 struct enc_private *k;
786 uint32_t irqtype, irqstatus;
792 if (dev->attached == 0)
794 /* lock to avoid race with comedi_poll */
795 spin_lock_irqsave(&dev->spinlock, flags);
797 /* save interrupt enable register state */
798 irqstatus = readl(devpriv->base_addr + P_IER);
800 /* read interrupt type */
801 irqtype = readl(devpriv->base_addr + P_ISR);
803 /* disable master interrupt */
804 writel(0, devpriv->base_addr + P_IER);
806 /* clear interrupt */
807 writel(irqtype, devpriv->base_addr + P_ISR);
810 case IRQ_RPS1: /* end_of_scan occurs */
811 /* manage ai subdevice */
813 cmd = &(s->async->cmd);
815 /* Init ptr to DMA buffer that holds new ADC data. We skip the
816 * first uint16_t in the buffer because it contains junk data from
817 * the final ADC of the previous poll list scan.
819 readaddr = (int32_t *) devpriv->ANABuf.LogicalBase + 1;
821 /* get the data and hand it over to comedi */
822 for (i = 0; i < (s->async->cmd.chanlist_len); i++) {
823 /* Convert ADC data to 16-bit integer values and copy to application */
825 tempdata = s626_ai_reg_to_uint((int)*readaddr);
828 /* put data into read buffer */
829 /* comedi_buf_put(s->async, tempdata); */
830 if (cfc_write_to_buffer(s, tempdata) == 0)
832 ("s626_irq_handler: cfc_write_to_buffer error!\n");
835 /* end of scan occurs */
836 s->async->events |= COMEDI_CB_EOS;
838 if (!(devpriv->ai_continous))
839 devpriv->ai_sample_count--;
840 if (devpriv->ai_sample_count <= 0) {
841 devpriv->ai_cmd_running = 0;
843 /* Stop RPS program. */
844 MC_DISABLE(P_MC1, MC1_ERPS1);
846 /* send end of acquisition */
847 s->async->events |= COMEDI_CB_EOA;
849 /* disable master interrupt */
853 if (devpriv->ai_cmd_running && cmd->scan_begin_src == TRIG_EXT)
854 s626_dio_set_irq(dev, cmd->scan_begin_arg);
855 /* tell comedi that data is there */
856 comedi_event(dev, s);
858 case IRQ_GPIO3: /* check dio and conter interrupt */
859 /* manage ai subdevice */
861 cmd = &(s->async->cmd);
863 /* s626_dio_clear_irq(dev); */
865 for (group = 0; group < S626_DIO_BANKS; group++) {
867 /* read interrupt type */
868 irqbit = DEBIread(dev,
869 ((struct dio_private *)(dev->
875 /* check if interrupt is generated from dio channels */
877 s626_dio_reset_irq(dev, group, irqbit);
878 if (devpriv->ai_cmd_running) {
879 /* check if interrupt is an ai acquisition start trigger */
880 if ((irqbit >> (cmd->start_arg -
882 == 1 && cmd->start_src == TRIG_EXT) {
883 /* Start executing the RPS program. */
884 MC_ENABLE(P_MC1, MC1_ERPS1);
886 if (cmd->scan_begin_src ==
888 s626_dio_set_irq(dev,
889 cmd->scan_begin_arg);
892 if ((irqbit >> (cmd->scan_begin_arg -
895 && cmd->scan_begin_src ==
897 /* Trigger ADC scan loop start by setting RPS Signal 0. */
898 MC_ENABLE(P_MC2, MC2_ADC_RPS);
900 if (cmd->convert_src ==
902 devpriv->ai_convert_count
905 s626_dio_set_irq(dev,
909 if (cmd->convert_src ==
912 devpriv->ai_convert_count
918 if ((irqbit >> (cmd->convert_arg -
921 && cmd->convert_src == TRIG_EXT) {
922 /* Trigger ADC scan loop start by setting RPS Signal 0. */
923 MC_ENABLE(P_MC2, MC2_ADC_RPS);
925 devpriv->ai_convert_count--;
927 if (devpriv->ai_convert_count >
929 s626_dio_set_irq(dev,
938 /* read interrupt type */
939 irqbit = DEBIread(dev, LP_RDMISC2);
941 /* check interrupt on counters */
942 if (irqbit & IRQ_COINT1A) {
945 /* clear interrupt capture flag */
946 k->ResetCapFlags(dev, k);
948 if (irqbit & IRQ_COINT2A) {
951 /* clear interrupt capture flag */
952 k->ResetCapFlags(dev, k);
954 if (irqbit & IRQ_COINT3A) {
957 /* clear interrupt capture flag */
958 k->ResetCapFlags(dev, k);
960 if (irqbit & IRQ_COINT1B) {
963 /* clear interrupt capture flag */
964 k->ResetCapFlags(dev, k);
966 if (irqbit & IRQ_COINT2B) {
969 /* clear interrupt capture flag */
970 k->ResetCapFlags(dev, k);
972 if (devpriv->ai_convert_count > 0) {
973 devpriv->ai_convert_count--;
974 if (devpriv->ai_convert_count == 0)
975 k->SetEnable(dev, k, CLKENAB_INDEX);
977 if (cmd->convert_src == TRIG_TIMER) {
978 /* Trigger ADC scan loop start by setting RPS Signal 0. */
979 MC_ENABLE(P_MC2, MC2_ADC_RPS);
983 if (irqbit & IRQ_COINT3B) {
986 /* clear interrupt capture flag */
987 k->ResetCapFlags(dev, k);
989 if (cmd->scan_begin_src == TRIG_TIMER) {
990 /* Trigger ADC scan loop start by setting RPS Signal 0. */
991 MC_ENABLE(P_MC2, MC2_ADC_RPS);
994 if (cmd->convert_src == TRIG_TIMER) {
996 devpriv->ai_convert_count = cmd->chanlist_len;
997 k->SetEnable(dev, k, CLKENAB_ALWAYS);
1002 /* enable interrupt */
1003 writel(irqstatus, devpriv->base_addr + P_IER);
1005 spin_unlock_irqrestore(&dev->spinlock, flags);
1010 * this functions build the RPS program for hardware driven acquistion
1012 static void ResetADC(struct comedi_device *dev, uint8_t *ppl)
1014 register uint32_t *pRPS;
1019 struct comedi_cmd *cmd = &(dev->subdevices->async->cmd);
1021 /* Stop RPS program in case it is currently running. */
1022 MC_DISABLE(P_MC1, MC1_ERPS1);
1024 /* Set starting logical address to write RPS commands. */
1025 pRPS = (uint32_t *) devpriv->RPSBuf.LogicalBase;
1027 /* Initialize RPS instruction pointer. */
1028 WR7146(P_RPSADDR1, (uint32_t) devpriv->RPSBuf.PhysicalBase);
1030 /* Construct RPS program in RPSBuf DMA buffer */
1032 if (cmd != NULL && cmd->scan_begin_src != TRIG_FOLLOW) {
1033 /* Wait for Start trigger. */
1034 *pRPS++ = RPS_PAUSE | RPS_SIGADC;
1035 *pRPS++ = RPS_CLRSIGNAL | RPS_SIGADC;
1038 /* SAA7146 BUG WORKAROUND Do a dummy DEBI Write. This is necessary
1039 * because the first RPS DEBI Write following a non-RPS DEBI write
1040 * seems to always fail. If we don't do this dummy write, the ADC
1041 * gain might not be set to the value required for the first slot in
1042 * the poll list; the ADC gain would instead remain unchanged from
1043 * the previously programmed value.
1045 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2);
1046 /* Write DEBI Write command and address to shadow RAM. */
1048 *pRPS++ = DEBI_CMD_WRWORD | LP_GSEL;
1049 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2);
1050 /* Write DEBI immediate data to shadow RAM: */
1052 *pRPS++ = GSEL_BIPOLAR5V;
1053 /* arbitrary immediate data value. */
1055 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI;
1056 /* Reset "shadow RAM uploaded" flag. */
1057 *pRPS++ = RPS_UPLOAD | RPS_DEBI; /* Invoke shadow RAM upload. */
1058 *pRPS++ = RPS_PAUSE | RPS_DEBI; /* Wait for shadow upload to finish. */
1060 /* Digitize all slots in the poll list. This is implemented as a
1061 * for loop to limit the slot count to 16 in case the application
1062 * forgot to set the EOPL flag in the final slot.
1064 for (devpriv->AdcItems = 0; devpriv->AdcItems < 16; devpriv->AdcItems++) {
1065 /* Convert application's poll list item to private board class
1066 * format. Each app poll list item is an uint8_t with form
1067 * (EOPL,x,x,RANGE,CHAN<3:0>), where RANGE code indicates 0 =
1068 * +-10V, 1 = +-5V, and EOPL = End of Poll List marker.
1071 (*ppl << 8) | (*ppl & 0x10 ? GSEL_BIPOLAR5V :
1074 /* Switch ADC analog gain. */
1075 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2); /* Write DEBI command */
1076 /* and address to */
1078 *pRPS++ = DEBI_CMD_WRWORD | LP_GSEL;
1079 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2); /* Write DEBI */
1080 /* immediate data to */
1083 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI; /* Reset "shadow RAM uploaded" */
1085 *pRPS++ = RPS_UPLOAD | RPS_DEBI; /* Invoke shadow RAM upload. */
1086 *pRPS++ = RPS_PAUSE | RPS_DEBI; /* Wait for shadow upload to */
1089 /* Select ADC analog input channel. */
1090 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2);
1091 /* Write DEBI command and address to shadow RAM. */
1092 *pRPS++ = DEBI_CMD_WRWORD | LP_ISEL;
1093 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2);
1094 /* Write DEBI immediate data to shadow RAM. */
1096 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI;
1097 /* Reset "shadow RAM uploaded" flag. */
1099 *pRPS++ = RPS_UPLOAD | RPS_DEBI;
1100 /* Invoke shadow RAM upload. */
1102 *pRPS++ = RPS_PAUSE | RPS_DEBI;
1103 /* Wait for shadow upload to finish. */
1105 /* Delay at least 10 microseconds for analog input settling.
1106 * Instead of padding with NOPs, we use RPS_JUMP instructions
1107 * here; this allows us to produce a longer delay than is
1108 * possible with NOPs because each RPS_JUMP flushes the RPS'
1109 * instruction prefetch pipeline.
1112 (uint32_t) devpriv->RPSBuf.PhysicalBase +
1113 (uint32_t) ((unsigned long)pRPS -
1114 (unsigned long)devpriv->RPSBuf.LogicalBase);
1115 for (i = 0; i < (10 * RPSCLK_PER_US / 2); i++) {
1116 JmpAdrs += 8; /* Repeat to implement time delay: */
1117 *pRPS++ = RPS_JUMP; /* Jump to next RPS instruction. */
1121 if (cmd != NULL && cmd->convert_src != TRIG_NOW) {
1122 /* Wait for Start trigger. */
1123 *pRPS++ = RPS_PAUSE | RPS_SIGADC;
1124 *pRPS++ = RPS_CLRSIGNAL | RPS_SIGADC;
1126 /* Start ADC by pulsing GPIO1. */
1127 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* Begin ADC Start pulse. */
1128 *pRPS++ = GPIO_BASE | GPIO1_LO;
1130 /* VERSION 2.03 CHANGE: STRETCH OUT ADC START PULSE. */
1131 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* End ADC Start pulse. */
1132 *pRPS++ = GPIO_BASE | GPIO1_HI;
1134 /* Wait for ADC to complete (GPIO2 is asserted high when ADC not
1135 * busy) and for data from previous conversion to shift into FB
1136 * BUFFER 1 register.
1138 *pRPS++ = RPS_PAUSE | RPS_GPIO2; /* Wait for ADC done. */
1140 /* Transfer ADC data from FB BUFFER 1 register to DMA buffer. */
1141 *pRPS++ = RPS_STREG | (BUGFIX_STREG(P_FB_BUFFER1) >> 2);
1143 (uint32_t) devpriv->ANABuf.PhysicalBase +
1144 (devpriv->AdcItems << 2);
1146 /* If this slot's EndOfPollList flag is set, all channels have */
1147 /* now been processed. */
1148 if (*ppl++ & EOPL) {
1149 devpriv->AdcItems++; /* Adjust poll list item count. */
1150 break; /* Exit poll list processing loop. */
1154 /* VERSION 2.01 CHANGE: DELAY CHANGED FROM 250NS to 2US. Allow the
1155 * ADC to stabilize for 2 microseconds before starting the final
1156 * (dummy) conversion. This delay is necessary to allow sufficient
1157 * time between last conversion finished and the start of the dummy
1158 * conversion. Without this delay, the last conversion's data value
1159 * is sometimes set to the previous conversion's data value.
1161 for (n = 0; n < (2 * RPSCLK_PER_US); n++)
1164 /* Start a dummy conversion to cause the data from the last
1165 * conversion of interest to be shifted in.
1167 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* Begin ADC Start pulse. */
1168 *pRPS++ = GPIO_BASE | GPIO1_LO;
1170 /* VERSION 2.03 CHANGE: STRETCH OUT ADC START PULSE. */
1171 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* End ADC Start pulse. */
1172 *pRPS++ = GPIO_BASE | GPIO1_HI;
1174 /* Wait for the data from the last conversion of interest to arrive
1175 * in FB BUFFER 1 register.
1177 *pRPS++ = RPS_PAUSE | RPS_GPIO2; /* Wait for ADC done. */
1179 /* Transfer final ADC data from FB BUFFER 1 register to DMA buffer. */
1180 *pRPS++ = RPS_STREG | (BUGFIX_STREG(P_FB_BUFFER1) >> 2); /* */
1182 (uint32_t) devpriv->ANABuf.PhysicalBase + (devpriv->AdcItems << 2);
1184 /* Indicate ADC scan loop is finished. */
1185 /* *pRPS++= RPS_CLRSIGNAL | RPS_SIGADC ; // Signal ReadADC() that scan is done. */
1187 /* invoke interrupt */
1188 if (devpriv->ai_cmd_running == 1) {
1191 /* Restart RPS program at its beginning. */
1192 *pRPS++ = RPS_JUMP; /* Branch to start of RPS program. */
1193 *pRPS++ = (uint32_t) devpriv->RPSBuf.PhysicalBase;
1195 /* End of RPS program build */
1198 /* TO COMPLETE, IF NECESSARY */
1199 static int s626_ai_insn_config(struct comedi_device *dev,
1200 struct comedi_subdevice *s,
1201 struct comedi_insn *insn, unsigned int *data)
1207 /* static int s626_ai_rinsn(struct comedi_device *dev,struct comedi_subdevice *s,struct comedi_insn *insn,unsigned int *data) */
1209 /* register uint8_t i; */
1210 /* register int32_t *readaddr; */
1212 /* Trigger ADC scan loop start by setting RPS Signal 0. */
1213 /* MC_ENABLE( P_MC2, MC2_ADC_RPS ); */
1215 /* Wait until ADC scan loop is finished (RPS Signal 0 reset). */
1216 /* while ( MC_TEST( P_MC2, MC2_ADC_RPS ) ); */
1218 /* Init ptr to DMA buffer that holds new ADC data. We skip the
1219 * first uint16_t in the buffer because it contains junk data from
1220 * the final ADC of the previous poll list scan.
1222 /* readaddr = (uint32_t *)devpriv->ANABuf.LogicalBase + 1; */
1224 /* Convert ADC data to 16-bit integer values and copy to application buffer. */
1225 /* for ( i = 0; i < devpriv->AdcItems; i++ ) { */
1226 /* *data = s626_ai_reg_to_uint( *readaddr++ ); */
1233 static int s626_ai_insn_read(struct comedi_device *dev,
1234 struct comedi_subdevice *s,
1235 struct comedi_insn *insn, unsigned int *data)
1237 uint16_t chan = CR_CHAN(insn->chanspec);
1238 uint16_t range = CR_RANGE(insn->chanspec);
1239 uint16_t AdcSpec = 0;
1243 /* interrupt call test */
1244 /* writel(IRQ_GPIO3,devpriv->base_addr+P_PSR); */
1245 /* Writing a logical 1 into any of the RPS_PSR bits causes the
1246 * corresponding interrupt to be generated if enabled
1249 /* Convert application's ADC specification into form
1250 * appropriate for register programming.
1253 AdcSpec = (chan << 8) | (GSEL_BIPOLAR5V);
1255 AdcSpec = (chan << 8) | (GSEL_BIPOLAR10V);
1257 /* Switch ADC analog gain. */
1258 DEBIwrite(dev, LP_GSEL, AdcSpec); /* Set gain. */
1260 /* Select ADC analog input channel. */
1261 DEBIwrite(dev, LP_ISEL, AdcSpec); /* Select channel. */
1263 for (n = 0; n < insn->n; n++) {
1265 /* Delay 10 microseconds for analog input settling. */
1268 /* Start ADC by pulsing GPIO1 low. */
1269 GpioImage = RR7146(P_GPIO);
1270 /* Assert ADC Start command */
1271 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1272 /* and stretch it out. */
1273 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1274 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1275 /* Negate ADC Start command. */
1276 WR7146(P_GPIO, GpioImage | GPIO1_HI);
1278 /* Wait for ADC to complete (GPIO2 is asserted high when */
1279 /* ADC not busy) and for data from previous conversion to */
1280 /* shift into FB BUFFER 1 register. */
1282 /* Wait for ADC done. */
1283 while (!(RR7146(P_PSR) & PSR_GPIO2))
1286 /* Fetch ADC data. */
1288 data[n - 1] = s626_ai_reg_to_uint(RR7146(P_FB_BUFFER1));
1290 /* Allow the ADC to stabilize for 4 microseconds before
1291 * starting the next (final) conversion. This delay is
1292 * necessary to allow sufficient time between last
1293 * conversion finished and the start of the next
1294 * conversion. Without this delay, the last conversion's
1295 * data value is sometimes set to the previous
1296 * conversion's data value.
1301 /* Start a dummy conversion to cause the data from the
1302 * previous conversion to be shifted in. */
1303 GpioImage = RR7146(P_GPIO);
1305 /* Assert ADC Start command */
1306 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1307 /* and stretch it out. */
1308 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1309 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1310 /* Negate ADC Start command. */
1311 WR7146(P_GPIO, GpioImage | GPIO1_HI);
1313 /* Wait for the data to arrive in FB BUFFER 1 register. */
1315 /* Wait for ADC done. */
1316 while (!(RR7146(P_PSR) & PSR_GPIO2))
1319 /* Fetch ADC data from audio interface's input shift register. */
1321 /* Fetch ADC data. */
1323 data[n - 1] = s626_ai_reg_to_uint(RR7146(P_FB_BUFFER1));
1328 static int s626_ai_load_polllist(uint8_t *ppl, struct comedi_cmd *cmd)
1333 for (n = 0; n < cmd->chanlist_len; n++) {
1334 if (CR_RANGE((cmd->chanlist)[n]) == 0)
1335 ppl[n] = (CR_CHAN((cmd->chanlist)[n])) | (RANGE_5V);
1337 ppl[n] = (CR_CHAN((cmd->chanlist)[n])) | (RANGE_10V);
1345 static int s626_ai_inttrig(struct comedi_device *dev,
1346 struct comedi_subdevice *s, unsigned int trignum)
1351 /* Start executing the RPS program. */
1352 MC_ENABLE(P_MC1, MC1_ERPS1);
1354 s->async->inttrig = NULL;
1359 /* This function doesn't require a particular form, this is just what
1360 * happens to be used in some of the drivers. It should convert ns
1361 * nanoseconds to a counter value suitable for programming the device.
1362 * Also, it should adjust ns so that it cooresponds to the actual time
1363 * that the device will use. */
1364 static int s626_ns_to_timer(int *nanosec, int round_mode)
1368 base = 500; /* 2MHz internal clock */
1370 switch (round_mode) {
1371 case TRIG_ROUND_NEAREST:
1373 divider = (*nanosec + base / 2) / base;
1375 case TRIG_ROUND_DOWN:
1376 divider = (*nanosec) / base;
1379 divider = (*nanosec + base - 1) / base;
1383 *nanosec = base * divider;
1387 static void s626_timer_load(struct comedi_device *dev, struct enc_private *k,
1390 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
1392 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
1393 (CLKSRC_TIMER << BF_CLKSRC) | /* Operating mode is Timer. */
1394 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
1395 (CNTDIR_DOWN << BF_CLKPOL) | /* Count direction is Down. */
1396 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
1397 (CLKENAB_INDEX << BF_CLKENAB);
1398 uint16_t valueSrclatch = LATCHSRC_A_INDXA;
1399 /* uint16_t enab=CLKENAB_ALWAYS; */
1401 k->SetMode(dev, k, Setup, FALSE);
1403 /* Set the preload register */
1404 Preload(dev, k, tick);
1406 /* Software index pulse forces the preload register to load */
1407 /* into the counter */
1408 k->SetLoadTrig(dev, k, 0);
1409 k->PulseIndex(dev, k);
1411 /* set reload on counter overflow */
1412 k->SetLoadTrig(dev, k, 1);
1414 /* set interrupt on overflow */
1415 k->SetIntSrc(dev, k, INTSRC_OVER);
1417 SetLatchSource(dev, k, valueSrclatch);
1418 /* k->SetEnable(dev,k,(uint16_t)(enab != 0)); */
1422 static int s626_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1426 struct comedi_cmd *cmd = &s->async->cmd;
1427 struct enc_private *k;
1430 if (devpriv->ai_cmd_running) {
1431 printk(KERN_ERR "s626_ai_cmd: Another ai_cmd is running %d\n",
1435 /* disable interrupt */
1436 writel(0, devpriv->base_addr + P_IER);
1438 /* clear interrupt request */
1439 writel(IRQ_RPS1 | IRQ_GPIO3, devpriv->base_addr + P_ISR);
1441 /* clear any pending interrupt */
1442 s626_dio_clear_irq(dev);
1443 /* s626_enc_clear_irq(dev); */
1445 /* reset ai_cmd_running flag */
1446 devpriv->ai_cmd_running = 0;
1448 /* test if cmd is valid */
1452 if (dev->irq == 0) {
1454 "s626_ai_cmd: cannot run command without an irq");
1458 s626_ai_load_polllist(ppl, cmd);
1459 devpriv->ai_cmd_running = 1;
1460 devpriv->ai_convert_count = 0;
1462 switch (cmd->scan_begin_src) {
1466 /* set a conter to generate adc trigger at scan_begin_arg interval */
1468 tick = s626_ns_to_timer((int *)&cmd->scan_begin_arg,
1469 cmd->flags & TRIG_ROUND_MASK);
1471 /* load timer value and enable interrupt */
1472 s626_timer_load(dev, k, tick);
1473 k->SetEnable(dev, k, CLKENAB_ALWAYS);
1476 /* set the digital line and interrupt for scan trigger */
1477 if (cmd->start_src != TRIG_EXT)
1478 s626_dio_set_irq(dev, cmd->scan_begin_arg);
1482 switch (cmd->convert_src) {
1486 /* set a conter to generate adc trigger at convert_arg interval */
1488 tick = s626_ns_to_timer((int *)&cmd->convert_arg,
1489 cmd->flags & TRIG_ROUND_MASK);
1491 /* load timer value and enable interrupt */
1492 s626_timer_load(dev, k, tick);
1493 k->SetEnable(dev, k, CLKENAB_INDEX);
1496 /* set the digital line and interrupt for convert trigger */
1497 if (cmd->scan_begin_src != TRIG_EXT
1498 && cmd->start_src == TRIG_EXT)
1499 s626_dio_set_irq(dev, cmd->convert_arg);
1503 switch (cmd->stop_src) {
1505 /* data arrives as one packet */
1506 devpriv->ai_sample_count = cmd->stop_arg;
1507 devpriv->ai_continous = 0;
1510 /* continous acquisition */
1511 devpriv->ai_continous = 1;
1512 devpriv->ai_sample_count = 0;
1518 switch (cmd->start_src) {
1520 /* Trigger ADC scan loop start by setting RPS Signal 0. */
1521 /* MC_ENABLE( P_MC2, MC2_ADC_RPS ); */
1523 /* Start executing the RPS program. */
1524 MC_ENABLE(P_MC1, MC1_ERPS1);
1526 s->async->inttrig = NULL;
1529 /* configure DIO channel for acquisition trigger */
1530 s626_dio_set_irq(dev, cmd->start_arg);
1532 s->async->inttrig = NULL;
1535 s->async->inttrig = s626_ai_inttrig;
1539 /* enable interrupt */
1540 writel(IRQ_GPIO3 | IRQ_RPS1, devpriv->base_addr + P_IER);
1545 static int s626_ai_cmdtest(struct comedi_device *dev,
1546 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1551 /* cmdtest tests a particular command to see if it is valid. Using
1552 * the cmdtest ioctl, a user can create a valid cmd and then have it
1553 * executes by the cmd ioctl.
1555 * cmdtest returns 1,2,3,4 or 0, depending on which tests the
1556 * command passes. */
1558 /* step 1: make sure trigger sources are trivially valid */
1560 tmp = cmd->start_src;
1561 cmd->start_src &= TRIG_NOW | TRIG_INT | TRIG_EXT;
1562 if (!cmd->start_src || tmp != cmd->start_src)
1565 tmp = cmd->scan_begin_src;
1566 cmd->scan_begin_src &= TRIG_TIMER | TRIG_EXT | TRIG_FOLLOW;
1567 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
1570 tmp = cmd->convert_src;
1571 cmd->convert_src &= TRIG_TIMER | TRIG_EXT | TRIG_NOW;
1572 if (!cmd->convert_src || tmp != cmd->convert_src)
1575 tmp = cmd->scan_end_src;
1576 cmd->scan_end_src &= TRIG_COUNT;
1577 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
1580 tmp = cmd->stop_src;
1581 cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
1582 if (!cmd->stop_src || tmp != cmd->stop_src)
1588 /* step 2: make sure trigger sources are unique and mutually
1591 /* note that mutual compatibility is not an issue here */
1592 if (cmd->scan_begin_src != TRIG_TIMER &&
1593 cmd->scan_begin_src != TRIG_EXT
1594 && cmd->scan_begin_src != TRIG_FOLLOW)
1596 if (cmd->convert_src != TRIG_TIMER &&
1597 cmd->convert_src != TRIG_EXT && cmd->convert_src != TRIG_NOW)
1599 if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
1605 /* step 3: make sure arguments are trivially compatible */
1607 if (cmd->start_src != TRIG_EXT && cmd->start_arg != 0) {
1612 if (cmd->start_src == TRIG_EXT && cmd->start_arg > 39) {
1613 cmd->start_arg = 39;
1617 if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg > 39) {
1618 cmd->scan_begin_arg = 39;
1622 if (cmd->convert_src == TRIG_EXT && cmd->convert_arg > 39) {
1623 cmd->convert_arg = 39;
1626 #define MAX_SPEED 200000 /* in nanoseconds */
1627 #define MIN_SPEED 2000000000 /* in nanoseconds */
1629 if (cmd->scan_begin_src == TRIG_TIMER) {
1630 if (cmd->scan_begin_arg < MAX_SPEED) {
1631 cmd->scan_begin_arg = MAX_SPEED;
1634 if (cmd->scan_begin_arg > MIN_SPEED) {
1635 cmd->scan_begin_arg = MIN_SPEED;
1639 /* external trigger */
1640 /* should be level/edge, hi/lo specification here */
1641 /* should specify multiple external triggers */
1642 /* if(cmd->scan_begin_arg>9){ */
1643 /* cmd->scan_begin_arg=9; */
1647 if (cmd->convert_src == TRIG_TIMER) {
1648 if (cmd->convert_arg < MAX_SPEED) {
1649 cmd->convert_arg = MAX_SPEED;
1652 if (cmd->convert_arg > MIN_SPEED) {
1653 cmd->convert_arg = MIN_SPEED;
1657 /* external trigger */
1659 /* if(cmd->convert_arg>9){ */
1660 /* cmd->convert_arg=9; */
1665 if (cmd->scan_end_arg != cmd->chanlist_len) {
1666 cmd->scan_end_arg = cmd->chanlist_len;
1669 if (cmd->stop_src == TRIG_COUNT) {
1670 if (cmd->stop_arg > 0x00ffffff) {
1671 cmd->stop_arg = 0x00ffffff;
1676 if (cmd->stop_arg != 0) {
1685 /* step 4: fix up any arguments */
1687 if (cmd->scan_begin_src == TRIG_TIMER) {
1688 tmp = cmd->scan_begin_arg;
1689 s626_ns_to_timer((int *)&cmd->scan_begin_arg,
1690 cmd->flags & TRIG_ROUND_MASK);
1691 if (tmp != cmd->scan_begin_arg)
1694 if (cmd->convert_src == TRIG_TIMER) {
1695 tmp = cmd->convert_arg;
1696 s626_ns_to_timer((int *)&cmd->convert_arg,
1697 cmd->flags & TRIG_ROUND_MASK);
1698 if (tmp != cmd->convert_arg)
1700 if (cmd->scan_begin_src == TRIG_TIMER &&
1701 cmd->scan_begin_arg <
1702 cmd->convert_arg * cmd->scan_end_arg) {
1703 cmd->scan_begin_arg =
1704 cmd->convert_arg * cmd->scan_end_arg;
1715 static int s626_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
1717 /* Stop RPS program in case it is currently running. */
1718 MC_DISABLE(P_MC1, MC1_ERPS1);
1720 /* disable master interrupt */
1721 writel(0, devpriv->base_addr + P_IER);
1723 devpriv->ai_cmd_running = 0;
1728 static int s626_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
1729 struct comedi_insn *insn, unsigned int *data)
1733 uint16_t chan = CR_CHAN(insn->chanspec);
1736 for (i = 0; i < insn->n; i++) {
1737 dacdata = (int16_t) data[i];
1738 devpriv->ao_readback[CR_CHAN(insn->chanspec)] = data[i];
1739 dacdata -= (0x1fff);
1741 SetDAC(dev, chan, dacdata);
1747 static int s626_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1748 struct comedi_insn *insn, unsigned int *data)
1752 for (i = 0; i < insn->n; i++)
1753 data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
1758 /* *************** DIGITAL I/O FUNCTIONS ***************
1759 * All DIO functions address a group of DIO channels by means of
1760 * "group" argument. group may be 0, 1 or 2, which correspond to DIO
1761 * ports A, B and C, respectively.
1764 static void s626_dio_init(struct comedi_device *dev)
1767 struct comedi_subdevice *s;
1769 /* Prepare to treat writes to WRCapSel as capture disables. */
1770 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
1772 /* For each group of sixteen channels ... */
1773 for (group = 0; group < S626_DIO_BANKS; group++) {
1774 s = dev->subdevices + 2 + group;
1775 DEBIwrite(dev, diopriv->WRIntSel, 0); /* Disable all interrupts. */
1776 DEBIwrite(dev, diopriv->WRCapSel, 0xFFFF); /* Disable all event */
1778 DEBIwrite(dev, diopriv->WREdgSel, 0); /* Init all DIOs to */
1781 DEBIwrite(dev, diopriv->WRDOut, 0); /* Program all outputs */
1782 /* to inactive state. */
1786 /* DIO devices are slightly special. Although it is possible to
1787 * implement the insn_read/insn_write interface, it is much more
1788 * useful to applications if you implement the insn_bits interface.
1789 * This allows packed reading/writing of the DIO channels. The comedi
1790 * core can convert between insn_bits and insn_read/write */
1792 static int s626_dio_insn_bits(struct comedi_device *dev,
1793 struct comedi_subdevice *s,
1794 struct comedi_insn *insn, unsigned int *data)
1797 * The insn data consists of a mask in data[0] and the new data in
1798 * data[1]. The mask defines which bits we are concerning about.
1799 * The new data must be anded with the mask. Each channel
1800 * corresponds to a bit.
1803 /* Check if requested ports are configured for output */
1804 if ((s->io_bits & data[0]) != data[0])
1807 s->state &= ~data[0];
1808 s->state |= data[0] & data[1];
1810 /* Write out the new digital output lines */
1812 DEBIwrite(dev, diopriv->WRDOut, s->state);
1814 data[1] = DEBIread(dev, diopriv->RDDIn);
1819 static int s626_dio_insn_config(struct comedi_device *dev,
1820 struct comedi_subdevice *s,
1821 struct comedi_insn *insn, unsigned int *data)
1825 case INSN_CONFIG_DIO_QUERY:
1828 io_bits & (1 << CR_CHAN(insn->chanspec))) ? COMEDI_OUTPUT :
1833 s->io_bits &= ~(1 << CR_CHAN(insn->chanspec));
1836 s->io_bits |= 1 << CR_CHAN(insn->chanspec);
1842 DEBIwrite(dev, diopriv->WRDOut, s->io_bits);
1847 /* Now this function initializes the value of the counter (data[0])
1848 and set the subdevice. To complete with trigger and interrupt
1850 static int s626_enc_insn_config(struct comedi_device *dev,
1851 struct comedi_subdevice *s,
1852 struct comedi_insn *insn, unsigned int *data)
1854 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
1856 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
1857 (CLKSRC_COUNTER << BF_CLKSRC) | /* Operating mode is Counter. */
1858 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
1859 /* ( CNTDIR_UP << BF_CLKPOL ) | // Count direction is Down. */
1860 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
1861 (CLKENAB_INDEX << BF_CLKENAB);
1862 /* uint16_t DisableIntSrc=TRUE; */
1863 /* uint32_t Preloadvalue; //Counter initial value */
1864 uint16_t valueSrclatch = LATCHSRC_AB_READ;
1865 uint16_t enab = CLKENAB_ALWAYS;
1866 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1868 /* (data==NULL) ? (Preloadvalue=0) : (Preloadvalue=data[0]); */
1870 k->SetMode(dev, k, Setup, TRUE);
1871 Preload(dev, k, *(insn->data));
1872 k->PulseIndex(dev, k);
1873 SetLatchSource(dev, k, valueSrclatch);
1874 k->SetEnable(dev, k, (uint16_t) (enab != 0));
1879 static int s626_enc_insn_read(struct comedi_device *dev,
1880 struct comedi_subdevice *s,
1881 struct comedi_insn *insn, unsigned int *data)
1885 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1887 for (n = 0; n < insn->n; n++)
1888 data[n] = ReadLatch(dev, k);
1893 static int s626_enc_insn_write(struct comedi_device *dev,
1894 struct comedi_subdevice *s,
1895 struct comedi_insn *insn, unsigned int *data)
1898 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1900 /* Set the preload register */
1901 Preload(dev, k, data[0]);
1903 /* Software index pulse forces the preload register to load */
1904 /* into the counter */
1905 k->SetLoadTrig(dev, k, 0);
1906 k->PulseIndex(dev, k);
1907 k->SetLoadTrig(dev, k, 2);
1912 static void WriteMISC2(struct comedi_device *dev, uint16_t NewImage)
1914 DEBIwrite(dev, LP_MISC1, MISC1_WENABLE); /* enab writes to */
1915 /* MISC2 register. */
1916 DEBIwrite(dev, LP_WRMISC2, NewImage); /* Write new image to MISC2. */
1917 DEBIwrite(dev, LP_MISC1, MISC1_WDISABLE); /* Disable writes to MISC2. */
1920 static void CloseDMAB(struct comedi_device *dev, struct bufferDMA *pdma,
1928 /* find the matching allocation from the board struct */
1930 vbptr = pdma->LogicalBase;
1931 vpptr = pdma->PhysicalBase;
1933 pci_free_consistent(devpriv->pdev, bsize, vbptr, vpptr);
1934 pdma->LogicalBase = NULL;
1935 pdma->PhysicalBase = 0;
1939 /* ****** PRIVATE COUNTER FUNCTIONS ****** */
1941 /* Reset a counter's index and overflow event capture flags. */
1943 static void ResetCapFlags_A(struct comedi_device *dev, struct enc_private *k)
1945 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
1946 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A);
1949 static void ResetCapFlags_B(struct comedi_device *dev, struct enc_private *k)
1951 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
1952 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B);
1955 /* Return counter setup in a format (COUNTER_SETUP) that is consistent */
1956 /* for both A and B counters. */
1958 static uint16_t GetMode_A(struct comedi_device *dev, struct enc_private *k)
1960 register uint16_t cra;
1961 register uint16_t crb;
1962 register uint16_t setup;
1964 /* Fetch CRA and CRB register images. */
1965 cra = DEBIread(dev, k->MyCRA);
1966 crb = DEBIread(dev, k->MyCRB);
1968 /* Populate the standardized counter setup bit fields. Note: */
1969 /* IndexSrc is restricted to ENC_X or IndxPol. */
1970 setup = ((cra & STDMSK_LOADSRC) /* LoadSrc = LoadSrcA. */
1971 |((crb << (STDBIT_LATCHSRC - CRBBIT_LATCHSRC)) & STDMSK_LATCHSRC) /* LatchSrc = LatchSrcA. */
1972 |((cra << (STDBIT_INTSRC - CRABIT_INTSRC_A)) & STDMSK_INTSRC) /* IntSrc = IntSrcA. */
1973 |((cra << (STDBIT_INDXSRC - (CRABIT_INDXSRC_A + 1))) & STDMSK_INDXSRC) /* IndxSrc = IndxSrcA<1>. */
1974 |((cra >> (CRABIT_INDXPOL_A - STDBIT_INDXPOL)) & STDMSK_INDXPOL) /* IndxPol = IndxPolA. */
1975 |((crb >> (CRBBIT_CLKENAB_A - STDBIT_CLKENAB)) & STDMSK_CLKENAB)); /* ClkEnab = ClkEnabA. */
1977 /* Adjust mode-dependent parameters. */
1978 if (cra & (2 << CRABIT_CLKSRC_A)) /* If Timer mode (ClkSrcA<1> == 1): */
1979 setup |= ((CLKSRC_TIMER << STDBIT_CLKSRC) /* Indicate Timer mode. */
1980 |((cra << (STDBIT_CLKPOL - CRABIT_CLKSRC_A)) & STDMSK_CLKPOL) /* Set ClkPol to indicate count direction (ClkSrcA<0>). */
1981 |(MULT_X1 << STDBIT_CLKMULT)); /* ClkMult must be 1x in Timer mode. */
1983 else /* If Counter mode (ClkSrcA<1> == 0): */
1984 setup |= ((CLKSRC_COUNTER << STDBIT_CLKSRC) /* Indicate Counter mode. */
1985 |((cra >> (CRABIT_CLKPOL_A - STDBIT_CLKPOL)) & STDMSK_CLKPOL) /* Pass through ClkPol. */
1986 |(((cra & CRAMSK_CLKMULT_A) == (MULT_X0 << CRABIT_CLKMULT_A)) ? /* Force ClkMult to 1x if not legal, else pass through. */
1987 (MULT_X1 << STDBIT_CLKMULT) :
1988 ((cra >> (CRABIT_CLKMULT_A -
1989 STDBIT_CLKMULT)) & STDMSK_CLKMULT)));
1991 /* Return adjusted counter setup. */
1995 static uint16_t GetMode_B(struct comedi_device *dev, struct enc_private *k)
1997 register uint16_t cra;
1998 register uint16_t crb;
1999 register uint16_t setup;
2001 /* Fetch CRA and CRB register images. */
2002 cra = DEBIread(dev, k->MyCRA);
2003 crb = DEBIread(dev, k->MyCRB);
2005 /* Populate the standardized counter setup bit fields. Note: */
2006 /* IndexSrc is restricted to ENC_X or IndxPol. */
2007 setup = (((crb << (STDBIT_INTSRC - CRBBIT_INTSRC_B)) & STDMSK_INTSRC) /* IntSrc = IntSrcB. */
2008 |((crb << (STDBIT_LATCHSRC - CRBBIT_LATCHSRC)) & STDMSK_LATCHSRC) /* LatchSrc = LatchSrcB. */
2009 |((crb << (STDBIT_LOADSRC - CRBBIT_LOADSRC_B)) & STDMSK_LOADSRC) /* LoadSrc = LoadSrcB. */
2010 |((crb << (STDBIT_INDXPOL - CRBBIT_INDXPOL_B)) & STDMSK_INDXPOL) /* IndxPol = IndxPolB. */
2011 |((crb >> (CRBBIT_CLKENAB_B - STDBIT_CLKENAB)) & STDMSK_CLKENAB) /* ClkEnab = ClkEnabB. */
2012 |((cra >> ((CRABIT_INDXSRC_B + 1) - STDBIT_INDXSRC)) & STDMSK_INDXSRC)); /* IndxSrc = IndxSrcB<1>. */
2014 /* Adjust mode-dependent parameters. */
2015 if ((crb & CRBMSK_CLKMULT_B) == (MULT_X0 << CRBBIT_CLKMULT_B)) /* If Extender mode (ClkMultB == MULT_X0): */
2016 setup |= ((CLKSRC_EXTENDER << STDBIT_CLKSRC) /* Indicate Extender mode. */
2017 |(MULT_X1 << STDBIT_CLKMULT) /* Indicate multiplier is 1x. */
2018 |((cra >> (CRABIT_CLKSRC_B - STDBIT_CLKPOL)) & STDMSK_CLKPOL)); /* Set ClkPol equal to Timer count direction (ClkSrcB<0>). */
2020 else if (cra & (2 << CRABIT_CLKSRC_B)) /* If Timer mode (ClkSrcB<1> == 1): */
2021 setup |= ((CLKSRC_TIMER << STDBIT_CLKSRC) /* Indicate Timer mode. */
2022 |(MULT_X1 << STDBIT_CLKMULT) /* Indicate multiplier is 1x. */
2023 |((cra >> (CRABIT_CLKSRC_B - STDBIT_CLKPOL)) & STDMSK_CLKPOL)); /* Set ClkPol equal to Timer count direction (ClkSrcB<0>). */
2025 else /* If Counter mode (ClkSrcB<1> == 0): */
2026 setup |= ((CLKSRC_COUNTER << STDBIT_CLKSRC) /* Indicate Timer mode. */
2027 |((crb >> (CRBBIT_CLKMULT_B - STDBIT_CLKMULT)) & STDMSK_CLKMULT) /* Clock multiplier is passed through. */
2028 |((crb << (STDBIT_CLKPOL - CRBBIT_CLKPOL_B)) & STDMSK_CLKPOL)); /* Clock polarity is passed through. */
2030 /* Return adjusted counter setup. */
2035 * Set the operating mode for the specified counter. The setup
2036 * parameter is treated as a COUNTER_SETUP data type. The following
2037 * parameters are programmable (all other parms are ignored): ClkMult,
2038 * ClkPol, ClkEnab, IndexSrc, IndexPol, LoadSrc.
2041 static void SetMode_A(struct comedi_device *dev, struct enc_private *k,
2042 uint16_t Setup, uint16_t DisableIntSrc)
2044 register uint16_t cra;
2045 register uint16_t crb;
2046 register uint16_t setup = Setup; /* Cache the Standard Setup. */
2048 /* Initialize CRA and CRB images. */
2049 cra = ((setup & CRAMSK_LOADSRC_A) /* Preload trigger is passed through. */
2050 |((setup & STDMSK_INDXSRC) >> (STDBIT_INDXSRC - (CRABIT_INDXSRC_A + 1)))); /* IndexSrc is restricted to ENC_X or IndxPol. */
2052 crb = (CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A /* Reset any pending CounterA event captures. */
2053 | ((setup & STDMSK_CLKENAB) << (CRBBIT_CLKENAB_A - STDBIT_CLKENAB))); /* Clock enable is passed through. */
2055 /* Force IntSrc to Disabled if DisableIntSrc is asserted. */
2057 cra |= ((setup & STDMSK_INTSRC) >> (STDBIT_INTSRC -
2060 /* Populate all mode-dependent attributes of CRA & CRB images. */
2061 switch ((setup & STDMSK_CLKSRC) >> STDBIT_CLKSRC) {
2062 case CLKSRC_EXTENDER: /* Extender Mode: Force to Timer mode */
2063 /* (Extender valid only for B counters). */
2065 case CLKSRC_TIMER: /* Timer Mode: */
2066 cra |= ((2 << CRABIT_CLKSRC_A) /* ClkSrcA<1> selects system clock */
2067 |((setup & STDMSK_CLKPOL) >> (STDBIT_CLKPOL - CRABIT_CLKSRC_A)) /* with count direction (ClkSrcA<0>) obtained from ClkPol. */
2068 |(1 << CRABIT_CLKPOL_A) /* ClkPolA behaves as always-on clock enable. */
2069 |(MULT_X1 << CRABIT_CLKMULT_A)); /* ClkMult must be 1x. */
2072 default: /* Counter Mode: */
2073 cra |= (CLKSRC_COUNTER /* Select ENC_C and ENC_D as clock/direction inputs. */
2074 | ((setup & STDMSK_CLKPOL) << (CRABIT_CLKPOL_A - STDBIT_CLKPOL)) /* Clock polarity is passed through. */
2075 |(((setup & STDMSK_CLKMULT) == (MULT_X0 << STDBIT_CLKMULT)) ? /* Force multiplier to x1 if not legal, otherwise pass through. */
2076 (MULT_X1 << CRABIT_CLKMULT_A) :
2077 ((setup & STDMSK_CLKMULT) << (CRABIT_CLKMULT_A -
2081 /* Force positive index polarity if IndxSrc is software-driven only, */
2082 /* otherwise pass it through. */
2083 if (~setup & STDMSK_INDXSRC)
2084 cra |= ((setup & STDMSK_INDXPOL) << (CRABIT_INDXPOL_A -
2087 /* If IntSrc has been forced to Disabled, update the MISC2 interrupt */
2088 /* enable mask to indicate the counter interrupt is disabled. */
2090 devpriv->CounterIntEnabs &= ~k->MyEventBits[3];
2092 /* While retaining CounterB and LatchSrc configurations, program the */
2093 /* new counter operating mode. */
2094 DEBIreplace(dev, k->MyCRA, CRAMSK_INDXSRC_B | CRAMSK_CLKSRC_B, cra);
2095 DEBIreplace(dev, k->MyCRB,
2096 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_A)), crb);
2099 static void SetMode_B(struct comedi_device *dev, struct enc_private *k,
2100 uint16_t Setup, uint16_t DisableIntSrc)
2102 register uint16_t cra;
2103 register uint16_t crb;
2104 register uint16_t setup = Setup; /* Cache the Standard Setup. */
2106 /* Initialize CRA and CRB images. */
2107 cra = ((setup & STDMSK_INDXSRC) << ((CRABIT_INDXSRC_B + 1) - STDBIT_INDXSRC)); /* IndexSrc field is restricted to ENC_X or IndxPol. */
2109 crb = (CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B /* Reset event captures and disable interrupts. */
2110 | ((setup & STDMSK_CLKENAB) << (CRBBIT_CLKENAB_B - STDBIT_CLKENAB)) /* Clock enable is passed through. */
2111 |((setup & STDMSK_LOADSRC) >> (STDBIT_LOADSRC - CRBBIT_LOADSRC_B))); /* Preload trigger source is passed through. */
2113 /* Force IntSrc to Disabled if DisableIntSrc is asserted. */
2115 crb |= ((setup & STDMSK_INTSRC) >> (STDBIT_INTSRC -
2118 /* Populate all mode-dependent attributes of CRA & CRB images. */
2119 switch ((setup & STDMSK_CLKSRC) >> STDBIT_CLKSRC) {
2120 case CLKSRC_TIMER: /* Timer Mode: */
2121 cra |= ((2 << CRABIT_CLKSRC_B) /* ClkSrcB<1> selects system clock */
2122 |((setup & STDMSK_CLKPOL) << (CRABIT_CLKSRC_B - STDBIT_CLKPOL))); /* with direction (ClkSrcB<0>) obtained from ClkPol. */
2123 crb |= ((1 << CRBBIT_CLKPOL_B) /* ClkPolB behaves as always-on clock enable. */
2124 |(MULT_X1 << CRBBIT_CLKMULT_B)); /* ClkMultB must be 1x. */
2127 case CLKSRC_EXTENDER: /* Extender Mode: */
2128 cra |= ((2 << CRABIT_CLKSRC_B) /* ClkSrcB source is OverflowA (same as "timer") */
2129 |((setup & STDMSK_CLKPOL) << (CRABIT_CLKSRC_B - STDBIT_CLKPOL))); /* with direction obtained from ClkPol. */
2130 crb |= ((1 << CRBBIT_CLKPOL_B) /* ClkPolB controls IndexB -- always set to active. */
2131 |(MULT_X0 << CRBBIT_CLKMULT_B)); /* ClkMultB selects OverflowA as the clock source. */
2134 default: /* Counter Mode: */
2135 cra |= (CLKSRC_COUNTER << CRABIT_CLKSRC_B); /* Select ENC_C and ENC_D as clock/direction inputs. */
2136 crb |= (((setup & STDMSK_CLKPOL) >> (STDBIT_CLKPOL - CRBBIT_CLKPOL_B)) /* ClkPol is passed through. */
2137 |(((setup & STDMSK_CLKMULT) == (MULT_X0 << STDBIT_CLKMULT)) ? /* Force ClkMult to x1 if not legal, otherwise pass through. */
2138 (MULT_X1 << CRBBIT_CLKMULT_B) :
2139 ((setup & STDMSK_CLKMULT) << (CRBBIT_CLKMULT_B -
2143 /* Force positive index polarity if IndxSrc is software-driven only, */
2144 /* otherwise pass it through. */
2145 if (~setup & STDMSK_INDXSRC)
2146 crb |= ((setup & STDMSK_INDXPOL) >> (STDBIT_INDXPOL -
2149 /* If IntSrc has been forced to Disabled, update the MISC2 interrupt */
2150 /* enable mask to indicate the counter interrupt is disabled. */
2152 devpriv->CounterIntEnabs &= ~k->MyEventBits[3];
2154 /* While retaining CounterA and LatchSrc configurations, program the */
2155 /* new counter operating mode. */
2156 DEBIreplace(dev, k->MyCRA,
2157 (uint16_t) (~(CRAMSK_INDXSRC_B | CRAMSK_CLKSRC_B)), cra);
2158 DEBIreplace(dev, k->MyCRB, CRBMSK_CLKENAB_A | CRBMSK_LATCHSRC, crb);
2161 /* Return/set a counter's enable. enab: 0=always enabled, 1=enabled by index. */
2163 static void SetEnable_A(struct comedi_device *dev, struct enc_private *k,
2166 DEBIreplace(dev, k->MyCRB,
2167 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_A)),
2168 (uint16_t) (enab << CRBBIT_CLKENAB_A));
2171 static void SetEnable_B(struct comedi_device *dev, struct enc_private *k,
2174 DEBIreplace(dev, k->MyCRB,
2175 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_B)),
2176 (uint16_t) (enab << CRBBIT_CLKENAB_B));
2179 static uint16_t GetEnable_A(struct comedi_device *dev, struct enc_private *k)
2181 return (DEBIread(dev, k->MyCRB) >> CRBBIT_CLKENAB_A) & 1;
2184 static uint16_t GetEnable_B(struct comedi_device *dev, struct enc_private *k)
2186 return (DEBIread(dev, k->MyCRB) >> CRBBIT_CLKENAB_B) & 1;
2190 * static uint16_t GetLatchSource(struct comedi_device *dev, struct enc_private *k )
2192 * return ( DEBIread( dev, k->MyCRB) >> CRBBIT_LATCHSRC ) & 3;
2197 * Return/set the event that will trigger transfer of the preload
2198 * register into the counter. 0=ThisCntr_Index, 1=ThisCntr_Overflow,
2199 * 2=OverflowA (B counters only), 3=disabled.
2202 static void SetLoadTrig_A(struct comedi_device *dev, struct enc_private *k,
2205 DEBIreplace(dev, k->MyCRA, (uint16_t) (~CRAMSK_LOADSRC_A),
2206 (uint16_t) (Trig << CRABIT_LOADSRC_A));
2209 static void SetLoadTrig_B(struct comedi_device *dev, struct enc_private *k,
2212 DEBIreplace(dev, k->MyCRB,
2213 (uint16_t) (~(CRBMSK_LOADSRC_B | CRBMSK_INTCTRL)),
2214 (uint16_t) (Trig << CRBBIT_LOADSRC_B));
2217 static uint16_t GetLoadTrig_A(struct comedi_device *dev, struct enc_private *k)
2219 return (DEBIread(dev, k->MyCRA) >> CRABIT_LOADSRC_A) & 3;
2222 static uint16_t GetLoadTrig_B(struct comedi_device *dev, struct enc_private *k)
2224 return (DEBIread(dev, k->MyCRB) >> CRBBIT_LOADSRC_B) & 3;
2227 /* Return/set counter interrupt source and clear any captured
2228 * index/overflow events. IntSource: 0=Disabled, 1=OverflowOnly,
2229 * 2=IndexOnly, 3=IndexAndOverflow.
2232 static void SetIntSrc_A(struct comedi_device *dev, struct enc_private *k,
2235 /* Reset any pending counter overflow or index captures. */
2236 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
2237 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A);
2239 /* Program counter interrupt source. */
2240 DEBIreplace(dev, k->MyCRA, ~CRAMSK_INTSRC_A,
2241 (uint16_t) (IntSource << CRABIT_INTSRC_A));
2243 /* Update MISC2 interrupt enable mask. */
2244 devpriv->CounterIntEnabs =
2245 (devpriv->CounterIntEnabs & ~k->
2246 MyEventBits[3]) | k->MyEventBits[IntSource];
2249 static void SetIntSrc_B(struct comedi_device *dev, struct enc_private *k,
2254 /* Cache writeable CRB register image. */
2255 crb = DEBIread(dev, k->MyCRB) & ~CRBMSK_INTCTRL;
2257 /* Reset any pending counter overflow or index captures. */
2258 DEBIwrite(dev, k->MyCRB,
2259 (uint16_t) (crb | CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B));
2261 /* Program counter interrupt source. */
2262 DEBIwrite(dev, k->MyCRB,
2263 (uint16_t) ((crb & ~CRBMSK_INTSRC_B) | (IntSource <<
2266 /* Update MISC2 interrupt enable mask. */
2267 devpriv->CounterIntEnabs =
2268 (devpriv->CounterIntEnabs & ~k->
2269 MyEventBits[3]) | k->MyEventBits[IntSource];
2272 static uint16_t GetIntSrc_A(struct comedi_device *dev, struct enc_private *k)
2274 return (DEBIread(dev, k->MyCRA) >> CRABIT_INTSRC_A) & 3;
2277 static uint16_t GetIntSrc_B(struct comedi_device *dev, struct enc_private *k)
2279 return (DEBIread(dev, k->MyCRB) >> CRBBIT_INTSRC_B) & 3;
2282 /* Return/set the clock multiplier. */
2284 /* static void SetClkMult(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2286 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKMULT ) | ( value << STDBIT_CLKMULT ) ), FALSE ); */
2289 /* static uint16_t GetClkMult(struct comedi_device *dev, struct enc_private *k ) */
2291 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKMULT ) & 3; */
2294 /* Return/set the clock polarity. */
2296 /* static void SetClkPol( struct comedi_device *dev,struct enc_private *k, uint16_t value ) */
2298 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKPOL ) | ( value << STDBIT_CLKPOL ) ), FALSE ); */
2301 /* static uint16_t GetClkPol(struct comedi_device *dev, struct enc_private *k ) */
2303 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKPOL ) & 1; */
2306 /* Return/set the clock source. */
2308 /* static void SetClkSrc( struct comedi_device *dev,struct enc_private *k, uint16_t value ) */
2310 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKSRC ) | ( value << STDBIT_CLKSRC ) ), FALSE ); */
2313 /* static uint16_t GetClkSrc( struct comedi_device *dev,struct enc_private *k ) */
2315 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKSRC ) & 3; */
2318 /* Return/set the index polarity. */
2320 /* static void SetIndexPol(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2322 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_INDXPOL ) | ( (value != 0) << STDBIT_INDXPOL ) ), FALSE ); */
2325 /* static uint16_t GetIndexPol(struct comedi_device *dev, struct enc_private *k ) */
2327 /* return ( k->GetMode(dev, k ) >> STDBIT_INDXPOL ) & 1; */
2330 /* Return/set the index source. */
2332 /* static void SetIndexSrc(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2334 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_INDXSRC ) | ( (value != 0) << STDBIT_INDXSRC ) ), FALSE ); */
2337 /* static uint16_t GetIndexSrc(struct comedi_device *dev, struct enc_private *k ) */
2339 /* return ( k->GetMode(dev, k ) >> STDBIT_INDXSRC ) & 1; */
2342 /* Generate an index pulse. */
2344 static void PulseIndex_A(struct comedi_device *dev, struct enc_private *k)
2346 register uint16_t cra;
2348 cra = DEBIread(dev, k->MyCRA); /* Pulse index. */
2349 DEBIwrite(dev, k->MyCRA, (uint16_t) (cra ^ CRAMSK_INDXPOL_A));
2350 DEBIwrite(dev, k->MyCRA, cra);
2353 static void PulseIndex_B(struct comedi_device *dev, struct enc_private *k)
2355 register uint16_t crb;
2357 crb = DEBIread(dev, k->MyCRB) & ~CRBMSK_INTCTRL; /* Pulse index. */
2358 DEBIwrite(dev, k->MyCRB, (uint16_t) (crb ^ CRBMSK_INDXPOL_B));
2359 DEBIwrite(dev, k->MyCRB, crb);
2362 static struct enc_private enc_private_data[] = {
2364 .GetEnable = GetEnable_A,
2365 .GetIntSrc = GetIntSrc_A,
2366 .GetLoadTrig = GetLoadTrig_A,
2367 .GetMode = GetMode_A,
2368 .PulseIndex = PulseIndex_A,
2369 .SetEnable = SetEnable_A,
2370 .SetIntSrc = SetIntSrc_A,
2371 .SetLoadTrig = SetLoadTrig_A,
2372 .SetMode = SetMode_A,
2373 .ResetCapFlags = ResetCapFlags_A,
2376 .MyLatchLsw = LP_CNTR0ALSW,
2377 .MyEventBits = EVBITS(0),
2379 .GetEnable = GetEnable_A,
2380 .GetIntSrc = GetIntSrc_A,
2381 .GetLoadTrig = GetLoadTrig_A,
2382 .GetMode = GetMode_A,
2383 .PulseIndex = PulseIndex_A,
2384 .SetEnable = SetEnable_A,
2385 .SetIntSrc = SetIntSrc_A,
2386 .SetLoadTrig = SetLoadTrig_A,
2387 .SetMode = SetMode_A,
2388 .ResetCapFlags = ResetCapFlags_A,
2391 .MyLatchLsw = LP_CNTR1ALSW,
2392 .MyEventBits = EVBITS(1),
2394 .GetEnable = GetEnable_A,
2395 .GetIntSrc = GetIntSrc_A,
2396 .GetLoadTrig = GetLoadTrig_A,
2397 .GetMode = GetMode_A,
2398 .PulseIndex = PulseIndex_A,
2399 .SetEnable = SetEnable_A,
2400 .SetIntSrc = SetIntSrc_A,
2401 .SetLoadTrig = SetLoadTrig_A,
2402 .SetMode = SetMode_A,
2403 .ResetCapFlags = ResetCapFlags_A,
2406 .MyLatchLsw = LP_CNTR2ALSW,
2407 .MyEventBits = EVBITS(2),
2409 .GetEnable = GetEnable_B,
2410 .GetIntSrc = GetIntSrc_B,
2411 .GetLoadTrig = GetLoadTrig_B,
2412 .GetMode = GetMode_B,
2413 .PulseIndex = PulseIndex_B,
2414 .SetEnable = SetEnable_B,
2415 .SetIntSrc = SetIntSrc_B,
2416 .SetLoadTrig = SetLoadTrig_B,
2417 .SetMode = SetMode_B,
2418 .ResetCapFlags = ResetCapFlags_B,
2421 .MyLatchLsw = LP_CNTR0BLSW,
2422 .MyEventBits = EVBITS(3),
2424 .GetEnable = GetEnable_B,
2425 .GetIntSrc = GetIntSrc_B,
2426 .GetLoadTrig = GetLoadTrig_B,
2427 .GetMode = GetMode_B,
2428 .PulseIndex = PulseIndex_B,
2429 .SetEnable = SetEnable_B,
2430 .SetIntSrc = SetIntSrc_B,
2431 .SetLoadTrig = SetLoadTrig_B,
2432 .SetMode = SetMode_B,
2433 .ResetCapFlags = ResetCapFlags_B,
2436 .MyLatchLsw = LP_CNTR1BLSW,
2437 .MyEventBits = EVBITS(4),
2439 .GetEnable = GetEnable_B,
2440 .GetIntSrc = GetIntSrc_B,
2441 .GetLoadTrig = GetLoadTrig_B,
2442 .GetMode = GetMode_B,
2443 .PulseIndex = PulseIndex_B,
2444 .SetEnable = SetEnable_B,
2445 .SetIntSrc = SetIntSrc_B,
2446 .SetLoadTrig = SetLoadTrig_B,
2447 .SetMode = SetMode_B,
2448 .ResetCapFlags = ResetCapFlags_B,
2451 .MyLatchLsw = LP_CNTR2BLSW,
2452 .MyEventBits = EVBITS(5),
2456 static void CountersInit(struct comedi_device *dev)
2459 struct enc_private *k;
2460 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
2462 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
2463 (CLKSRC_COUNTER << BF_CLKSRC) | /* Operating mode is counter. */
2464 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
2465 (CNTDIR_UP << BF_CLKPOL) | /* Count direction is up. */
2466 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
2467 (CLKENAB_INDEX << BF_CLKENAB); /* Enabled by index */
2469 /* Disable all counter interrupts and clear any captured counter events. */
2470 for (chan = 0; chan < S626_ENCODER_CHANNELS; chan++) {
2472 k->SetMode(dev, k, Setup, TRUE);
2473 k->SetIntSrc(dev, k, 0);
2474 k->ResetCapFlags(dev, k);
2475 k->SetEnable(dev, k, CLKENAB_ALWAYS);
2479 static struct pci_dev *s626_find_pci(struct comedi_device *dev,
2480 struct comedi_devconfig *it)
2482 struct pci_dev *pcidev = NULL;
2483 int bus = it->options[0];
2484 int slot = it->options[1];
2487 for (i = 0; i < ARRAY_SIZE(s626_boards) && !pcidev; i++) {
2489 pcidev = pci_get_subsys(s626_boards[i].vendor_id,
2490 s626_boards[i].device_id,
2491 s626_boards[i].subvendor_id,
2492 s626_boards[i].subdevice_id,
2495 if ((bus || slot) && pcidev) {
2496 /* matches requested bus/slot */
2497 if (pcidev->bus->number == bus &&
2498 PCI_SLOT(pcidev->devfn) == slot)
2508 static int s626_attach(struct comedi_device *dev, struct comedi_devconfig *it)
2510 /* uint8_t PollList; */
2511 /* uint16_t AdcData; */
2512 /* uint16_t StartVal; */
2513 /* uint16_t index; */
2514 /* unsigned int data[16]; */
2518 resource_size_t resourceStart;
2520 struct comedi_subdevice *s;
2522 if (alloc_private(dev, sizeof(struct s626_private)) < 0)
2525 devpriv->pdev = s626_find_pci(dev, it);
2526 if (!devpriv->pdev) {
2527 printk(KERN_ERR "s626_attach: Board not present!!!\n");
2531 result = comedi_pci_enable(devpriv->pdev, "s626");
2533 printk(KERN_ERR "s626_attach: comedi_pci_enable fails\n");
2536 devpriv->got_regions = 1;
2538 resourceStart = pci_resource_start(devpriv->pdev, 0);
2540 devpriv->base_addr = ioremap(resourceStart, SIZEOF_ADDRESS_SPACE);
2541 if (devpriv->base_addr == NULL) {
2542 printk(KERN_ERR "s626_attach: IOREMAP failed\n");
2546 if (devpriv->base_addr) {
2547 /* disable master interrupt */
2548 writel(0, devpriv->base_addr + P_IER);
2551 writel(MC1_SOFT_RESET, devpriv->base_addr + P_MC1);
2553 /* DMA FIXME DMA// */
2555 /* adc buffer allocation */
2556 devpriv->allocatedBuf = 0;
2558 devpriv->ANABuf.LogicalBase =
2559 pci_alloc_consistent(devpriv->pdev, DMABUF_SIZE, &appdma);
2561 if (devpriv->ANABuf.LogicalBase == NULL) {
2562 printk(KERN_ERR "s626_attach: DMA Memory mapping error\n");
2566 devpriv->ANABuf.PhysicalBase = appdma;
2568 devpriv->allocatedBuf++;
2570 devpriv->RPSBuf.LogicalBase =
2571 pci_alloc_consistent(devpriv->pdev, DMABUF_SIZE, &appdma);
2573 if (devpriv->RPSBuf.LogicalBase == NULL) {
2574 printk(KERN_ERR "s626_attach: DMA Memory mapping error\n");
2578 devpriv->RPSBuf.PhysicalBase = appdma;
2580 devpriv->allocatedBuf++;
2584 dev->board_ptr = s626_boards;
2585 dev->board_name = thisboard->name;
2587 ret = comedi_alloc_subdevices(dev, 6);
2591 dev->iobase = (unsigned long)devpriv->base_addr;
2592 dev->irq = devpriv->pdev->irq;
2594 /* set up interrupt handler */
2595 if (dev->irq == 0) {
2596 printk(KERN_ERR " unknown irq (bad)\n");
2598 ret = request_irq(dev->irq, s626_irq_handler, IRQF_SHARED,
2602 printk(KERN_ERR " irq not available\n");
2607 s = dev->subdevices + 0;
2608 /* analog input subdevice */
2609 dev->read_subdev = s;
2610 /* we support single-ended (ground) and differential */
2611 s->type = COMEDI_SUBD_AI;
2612 s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_CMD_READ;
2613 s->n_chan = thisboard->ai_chans;
2614 s->maxdata = (0xffff >> 2);
2615 s->range_table = &s626_range_table;
2616 s->len_chanlist = thisboard->ai_chans; /* This is the maximum chanlist
2617 length that the board can
2619 s->insn_config = s626_ai_insn_config;
2620 s->insn_read = s626_ai_insn_read;
2621 s->do_cmd = s626_ai_cmd;
2622 s->do_cmdtest = s626_ai_cmdtest;
2623 s->cancel = s626_ai_cancel;
2625 s = dev->subdevices + 1;
2626 /* analog output subdevice */
2627 s->type = COMEDI_SUBD_AO;
2628 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2629 s->n_chan = thisboard->ao_chans;
2630 s->maxdata = (0x3fff);
2631 s->range_table = &range_bipolar10;
2632 s->insn_write = s626_ao_winsn;
2633 s->insn_read = s626_ao_rinsn;
2635 s = dev->subdevices + 2;
2636 /* digital I/O subdevice */
2637 s->type = COMEDI_SUBD_DIO;
2638 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2641 s->io_bits = 0xffff;
2642 s->private = &dio_private_A;
2643 s->range_table = &range_digital;
2644 s->insn_config = s626_dio_insn_config;
2645 s->insn_bits = s626_dio_insn_bits;
2647 s = dev->subdevices + 3;
2648 /* digital I/O subdevice */
2649 s->type = COMEDI_SUBD_DIO;
2650 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2653 s->io_bits = 0xffff;
2654 s->private = &dio_private_B;
2655 s->range_table = &range_digital;
2656 s->insn_config = s626_dio_insn_config;
2657 s->insn_bits = s626_dio_insn_bits;
2659 s = dev->subdevices + 4;
2660 /* digital I/O subdevice */
2661 s->type = COMEDI_SUBD_DIO;
2662 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2665 s->io_bits = 0xffff;
2666 s->private = &dio_private_C;
2667 s->range_table = &range_digital;
2668 s->insn_config = s626_dio_insn_config;
2669 s->insn_bits = s626_dio_insn_bits;
2671 s = dev->subdevices + 5;
2672 /* encoder (counter) subdevice */
2673 s->type = COMEDI_SUBD_COUNTER;
2674 s->subdev_flags = SDF_WRITABLE | SDF_READABLE | SDF_LSAMPL;
2675 s->n_chan = thisboard->enc_chans;
2676 s->private = enc_private_data;
2677 s->insn_config = s626_enc_insn_config;
2678 s->insn_read = s626_enc_insn_read;
2679 s->insn_write = s626_enc_insn_write;
2680 s->maxdata = 0xffffff;
2681 s->range_table = &range_unknown;
2683 /* stop ai_command */
2684 devpriv->ai_cmd_running = 0;
2686 if (devpriv->base_addr && (devpriv->allocatedBuf == 2)) {
2687 dma_addr_t pPhysBuf;
2690 /* enab DEBI and audio pins, enable I2C interface. */
2691 MC_ENABLE(P_MC1, MC1_DEBI | MC1_AUDIO | MC1_I2C);
2692 /* Configure DEBI operating mode. */
2693 WR7146(P_DEBICFG, DEBI_CFG_SLAVE16 /* Local bus is 16 */
2695 | (DEBI_TOUT << DEBI_CFG_TOUT_BIT)
2698 /* transfer timeout */
2700 |DEBI_SWAP /* Set up byte lane */
2702 | DEBI_CFG_INTEL); /* Intel-compatible */
2703 /* local bus (DEBI */
2704 /* never times out). */
2706 /* DEBI INIT S626 WR7146( P_DEBICFG, DEBI_CFG_INTEL | DEBI_CFG_TOQ */
2707 /* | DEBI_CFG_INCQ| DEBI_CFG_16Q); //end */
2709 /* Paging is disabled. */
2710 WR7146(P_DEBIPAGE, DEBI_PAGE_DISABLE); /* Disable MMU paging. */
2712 /* Init GPIO so that ADC Start* is negated. */
2713 WR7146(P_GPIO, GPIO_BASE | GPIO1_HI);
2715 /* IsBoardRevA is a boolean that indicates whether the board is RevA.
2717 * VERSION 2.01 CHANGE: REV A & B BOARDS NOW SUPPORTED BY DYNAMIC
2718 * EEPROM ADDRESS SELECTION. Initialize the I2C interface, which
2719 * is used to access the onboard serial EEPROM. The EEPROM's I2C
2720 * DeviceAddress is hardwired to a value that is dependent on the
2721 * 626 board revision. On all board revisions, the EEPROM stores
2722 * TrimDAC calibration constants for analog I/O. On RevB and
2723 * higher boards, the DeviceAddress is hardwired to 0 to enable
2724 * the EEPROM to also store the PCI SubVendorID and SubDeviceID;
2725 * this is the address at which the SAA7146 expects a
2726 * configuration EEPROM to reside. On RevA boards, the EEPROM
2727 * device address, which is hardwired to 4, prevents the SAA7146
2728 * from retrieving PCI sub-IDs, so the SAA7146 uses its built-in
2729 * default values, instead.
2732 /* devpriv->I2Cards= IsBoardRevA ? 0xA8 : 0xA0; // Set I2C EEPROM */
2733 /* DeviceType (0xA0) */
2734 /* and DeviceAddress<<1. */
2736 devpriv->I2CAdrs = 0xA0; /* I2C device address for onboard */
2739 /* Issue an I2C ABORT command to halt any I2C operation in */
2740 /* progress and reset BUSY flag. */
2741 WR7146(P_I2CSTAT, I2C_CLKSEL | I2C_ABORT);
2742 /* Write I2C control: abort any I2C activity. */
2743 MC_ENABLE(P_MC2, MC2_UPLD_IIC);
2744 /* Invoke command upload */
2745 while ((RR7146(P_MC2) & MC2_UPLD_IIC) == 0)
2747 /* and wait for upload to complete. */
2749 /* Per SAA7146 data sheet, write to STATUS reg twice to
2750 * reset all I2C error flags. */
2751 for (i = 0; i < 2; i++) {
2752 WR7146(P_I2CSTAT, I2C_CLKSEL);
2753 /* Write I2C control: reset error flags. */
2754 MC_ENABLE(P_MC2, MC2_UPLD_IIC); /* Invoke command upload */
2755 while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
2757 /* and wait for upload to complete. */
2760 /* Init audio interface functional attributes: set DAC/ADC
2761 * serial clock rates, invert DAC serial clock so that
2762 * DAC data setup times are satisfied, enable DAC serial
2766 WR7146(P_ACON2, ACON2_INIT);
2768 /* Set up TSL1 slot list, which is used to control the
2769 * accumulation of ADC data: RSD1 = shift data in on SD1.
2770 * SIB_A1 = store data uint8_t at next available location in
2771 * FB BUFFER1 register. */
2772 WR7146(P_TSL1, RSD1 | SIB_A1);
2773 /* Fetch ADC high data uint8_t. */
2774 WR7146(P_TSL1 + 4, RSD1 | SIB_A1 | EOS);
2775 /* Fetch ADC low data uint8_t; end of TSL1. */
2777 /* enab TSL1 slot list so that it executes all the time. */
2778 WR7146(P_ACON1, ACON1_ADCSTART);
2780 /* Initialize RPS registers used for ADC. */
2782 /* Physical start of RPS program. */
2783 WR7146(P_RPSADDR1, (uint32_t) devpriv->RPSBuf.PhysicalBase);
2785 WR7146(P_RPSPAGE1, 0);
2786 /* RPS program performs no explicit mem writes. */
2787 WR7146(P_RPS1_TOUT, 0); /* Disable RPS timeouts. */
2789 /* SAA7146 BUG WORKAROUND. Initialize SAA7146 ADC interface
2790 * to a known state by invoking ADCs until FB BUFFER 1
2791 * register shows that it is correctly receiving ADC data.
2792 * This is necessary because the SAA7146 ADC interface does
2793 * not start up in a defined state after a PCI reset.
2796 /* PollList = EOPL; // Create a simple polling */
2797 /* // list for analog input */
2799 /* ResetADC( dev, &PollList ); */
2801 /* s626_ai_rinsn(dev,dev->subdevices,NULL,data); //( &AdcData ); // */
2802 /* //Get initial ADC */
2805 /* StartVal = data[0]; */
2807 /* // VERSION 2.01 CHANGE: TIMEOUT ADDED TO PREVENT HANGED EXECUTION. */
2808 /* // Invoke ADCs until the new ADC value differs from the initial */
2809 /* // value or a timeout occurs. The timeout protects against the */
2810 /* // possibility that the driver is restarting and the ADC data is a */
2811 /* // fixed value resulting from the applied ADC analog input being */
2812 /* // unusually quiet or at the rail. */
2814 /* for ( index = 0; index < 500; index++ ) */
2816 /* s626_ai_rinsn(dev,dev->subdevices,NULL,data); */
2817 /* AdcData = data[0]; //ReadADC( &AdcData ); */
2818 /* if ( AdcData != StartVal ) */
2824 /* init the DAC interface */
2826 /* Init Audio2's output DMAC attributes: burst length = 1
2827 * DWORD, threshold = 1 DWORD.
2829 WR7146(P_PCI_BT_A, 0);
2831 /* Init Audio2's output DMA physical addresses. The protection
2832 * address is set to 1 DWORD past the base address so that a
2833 * single DWORD will be transferred each time a DMA transfer is
2837 devpriv->ANABuf.PhysicalBase +
2838 (DAC_WDMABUF_OS * sizeof(uint32_t));
2840 WR7146(P_BASEA2_OUT, (uint32_t) pPhysBuf); /* Buffer base adrs. */
2841 WR7146(P_PROTA2_OUT, (uint32_t) (pPhysBuf + sizeof(uint32_t))); /* Protection address. */
2843 /* Cache Audio2's output DMA buffer logical address. This is
2844 * where DAC data is buffered for A2 output DMA transfers. */
2846 (uint32_t *) devpriv->ANABuf.LogicalBase + DAC_WDMABUF_OS;
2848 /* Audio2's output channels does not use paging. The protection
2849 * violation handling bit is set so that the DMAC will
2850 * automatically halt and its PCI address pointer will be reset
2851 * when the protection address is reached. */
2853 WR7146(P_PAGEA2_OUT, 8);
2855 /* Initialize time slot list 2 (TSL2), which is used to control
2856 * the clock generation for and serialization of data to be sent
2857 * to the DAC devices. Slot 0 is a NOP that is used to trap TSL
2858 * execution; this permits other slots to be safely modified
2859 * without first turning off the TSL sequencer (which is
2860 * apparently impossible to do). Also, SD3 (which is driven by a
2861 * pull-up resistor) is shifted in and stored to the MSB of
2862 * FB_BUFFER2 to be used as evidence that the slot sequence has
2863 * not yet finished executing.
2866 SETVECT(0, XSD2 | RSD3 | SIB_A2 | EOS);
2867 /* Slot 0: Trap TSL execution, shift 0xFF into FB_BUFFER2. */
2869 /* Initialize slot 1, which is constant. Slot 1 causes a
2870 * DWORD to be transferred from audio channel 2's output FIFO
2871 * to the FIFO's output buffer so that it can be serialized
2872 * and sent to the DAC during subsequent slots. All remaining
2873 * slots are dynamically populated as required by the target
2877 /* Slot 1: Fetch DWORD from Audio2's output FIFO. */
2879 /* Start DAC's audio interface (TSL2) running. */
2880 WR7146(P_ACON1, ACON1_DACSTART);
2882 /* end init DAC interface */
2884 /* Init Trim DACs to calibrated values. Do it twice because the
2885 * SAA7146 audio channel does not always reset properly and
2886 * sometimes causes the first few TrimDAC writes to malfunction.
2890 LoadTrimDACs(dev); /* Insurance. */
2892 /* Manually init all gate array hardware in case this is a soft
2893 * reset (we have no way of determining whether this is a warm
2894 * or cold start). This is necessary because the gate array will
2895 * reset only in response to a PCI hard reset; there is no soft
2896 * reset function. */
2898 /* Init all DAC outputs to 0V and init all DAC setpoint and
2901 for (chan = 0; chan < S626_DAC_CHANNELS; chan++)
2902 SetDAC(dev, chan, 0);
2904 /* Init image of WRMISC2 Battery Charger Enabled control bit.
2905 * This image is used when the state of the charger control bit,
2906 * which has no direct hardware readback mechanism, is queried.
2908 devpriv->ChargeEnabled = 0;
2910 /* Init image of watchdog timer interval in WRMISC2. This image
2911 * maintains the value of the control bits of MISC2 are
2912 * continuously reset to zero as long as the WD timer is disabled.
2914 devpriv->WDInterval = 0;
2916 /* Init Counter Interrupt enab mask for RDMISC2. This mask is
2917 * applied against MISC2 when testing to determine which timer
2918 * events are requesting interrupt service.
2920 devpriv->CounterIntEnabs = 0;
2922 /* Init counters. */
2925 /* Without modifying the state of the Battery Backup enab, disable
2926 * the watchdog timer, set DIO channels 0-5 to operate in the
2927 * standard DIO (vs. counter overflow) mode, disable the battery
2928 * charger, and reset the watchdog interval selector to zero.
2930 WriteMISC2(dev, (uint16_t) (DEBIread(dev,
2932 MISC2_BATT_ENABLE));
2934 /* Initialize the digital I/O subsystem. */
2937 /* enable interrupt test */
2938 /* writel(IRQ_GPIO3 | IRQ_RPS1,devpriv->base_addr+P_IER); */
2944 static void s626_detach(struct comedi_device *dev)
2947 /* stop ai_command */
2948 devpriv->ai_cmd_running = 0;
2950 if (devpriv->base_addr) {
2951 /* interrupt mask */
2952 WR7146(P_IER, 0); /* Disable master interrupt. */
2953 WR7146(P_ISR, IRQ_GPIO3 | IRQ_RPS1); /* Clear board's IRQ status flag. */
2955 /* Disable the watchdog timer and battery charger. */
2958 /* Close all interfaces on 7146 device. */
2959 WR7146(P_MC1, MC1_SHUTDOWN);
2960 WR7146(P_ACON1, ACON1_BASE);
2962 CloseDMAB(dev, &devpriv->RPSBuf, DMABUF_SIZE);
2963 CloseDMAB(dev, &devpriv->ANABuf, DMABUF_SIZE);
2967 free_irq(dev->irq, dev);
2968 if (devpriv->base_addr)
2969 iounmap(devpriv->base_addr);
2970 if (devpriv->pdev) {
2971 if (devpriv->got_regions)
2972 comedi_pci_disable(devpriv->pdev);
2973 pci_dev_put(devpriv->pdev);
2978 static struct comedi_driver s626_driver = {
2979 .driver_name = "s626",
2980 .module = THIS_MODULE,
2981 .attach = s626_attach,
2982 .detach = s626_detach,
2985 static int __devinit s626_pci_probe(struct pci_dev *dev,
2986 const struct pci_device_id *ent)
2988 return comedi_pci_auto_config(dev, &s626_driver);
2991 static void __devexit s626_pci_remove(struct pci_dev *dev)
2993 comedi_pci_auto_unconfig(dev);
2997 * For devices with vendor:device id == 0x1131:0x7146 you must specify
2998 * also subvendor:subdevice ids, because otherwise it will conflict with
2999 * Philips SAA7146 media/dvb based cards.
3001 static DEFINE_PCI_DEVICE_TABLE(s626_pci_table) = {
3002 { PCI_VENDOR_ID_S626, PCI_DEVICE_ID_S626,
3003 PCI_SUBVENDOR_ID_S626, PCI_SUBDEVICE_ID_S626, 0, 0, 0 },
3006 MODULE_DEVICE_TABLE(pci, s626_pci_table);
3008 static struct pci_driver s626_pci_driver = {
3010 .id_table = s626_pci_table,
3011 .probe = s626_pci_probe,
3012 .remove = __devexit_p(s626_pci_remove),
3014 module_comedi_pci_driver(s626_driver, s626_pci_driver);
3016 MODULE_AUTHOR("Gianluca Palli <gpalli@deis.unibo.it>");
3017 MODULE_DESCRIPTION("Sensoray 626 Comedi driver module");
3018 MODULE_LICENSE("GPL");