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: not applicable, uses PCI auto config
37 INSN_CONFIG instructions:
45 s626 has 3 dio subdevices (2,3 and 4) each with 16 i/o channels
46 supported configuration options:
52 Every channel must be configured before reading.
56 insn.insn=INSN_CONFIG; //configuration instruction
57 insn.n=1; //number of operation (must be 1)
58 insn.data=&initialvalue; //initial value loaded into encoder
59 //during configuration
60 insn.subdev=5; //encoder subdevice
61 insn.chanspec=CR_PACK(encoder_channel,0,AREF_OTHER); //encoder_channel
64 comedi_do_insn(cf,&insn); //executing configuration
67 #include <linux/interrupt.h>
68 #include <linux/kernel.h>
69 #include <linux/types.h>
71 #include "../comedidev.h"
73 #include "comedi_fc.h"
76 #define PCI_VENDOR_ID_S626 0x1131
77 #define PCI_DEVICE_ID_S626 0x7146
78 #define PCI_SUBVENDOR_ID_S626 0x6000
79 #define PCI_SUBDEVICE_ID_S626 0x0272
82 void __iomem *base_addr;
83 uint8_t ai_cmd_running; /* ai_cmd is running */
84 uint8_t ai_continous; /* continous acquisition */
85 int ai_sample_count; /* number of samples to acquire */
86 unsigned int ai_sample_timer;
87 /* time between samples in units of the timer */
88 int ai_convert_count; /* conversion counter */
89 unsigned int ai_convert_timer;
90 /* time between conversion in units of the timer */
91 uint16_t CounterIntEnabs;
92 /* Counter interrupt enable mask for MISC2 register. */
93 uint8_t AdcItems; /* Number of items in ADC poll list. */
94 struct bufferDMA RPSBuf; /* DMA buffer used to hold ADC (RPS1) program. */
95 struct bufferDMA ANABuf;
96 /* DMA buffer used to receive ADC data and hold DAC data. */
98 /* Pointer to logical adrs of DMA buffer used to hold DAC data. */
99 uint16_t Dacpol; /* Image of DAC polarity register. */
100 uint8_t TrimSetpoint[12]; /* Images of TrimDAC setpoints */
101 /* Charge Enabled (0 or WRMISC2_CHARGE_ENABLE). */
103 /* I2C device address for onboard EEPROM (board rev dependent). */
105 unsigned int ao_readback[S626_DAC_CHANNELS];
120 static struct dio_private dio_private_A = {
122 .WRDOut = LP_WRDOUTA,
123 .RDEdgSel = LP_RDEDGSELA,
124 .WREdgSel = LP_WREDGSELA,
125 .RDCapSel = LP_RDCAPSELA,
126 .WRCapSel = LP_WRCAPSELA,
127 .RDCapFlg = LP_RDCAPFLGA,
128 .RDIntSel = LP_RDINTSELA,
129 .WRIntSel = LP_WRINTSELA,
132 static struct dio_private dio_private_B = {
134 .WRDOut = LP_WRDOUTB,
135 .RDEdgSel = LP_RDEDGSELB,
136 .WREdgSel = LP_WREDGSELB,
137 .RDCapSel = LP_RDCAPSELB,
138 .WRCapSel = LP_WRCAPSELB,
139 .RDCapFlg = LP_RDCAPFLGB,
140 .RDIntSel = LP_RDINTSELB,
141 .WRIntSel = LP_WRINTSELB,
144 static struct dio_private dio_private_C = {
146 .WRDOut = LP_WRDOUTC,
147 .RDEdgSel = LP_RDEDGSELC,
148 .WREdgSel = LP_WREDGSELC,
149 .RDCapSel = LP_RDCAPSELC,
150 .WRCapSel = LP_WRCAPSELC,
151 .RDCapFlg = LP_RDCAPFLGC,
152 .RDIntSel = LP_RDINTSELC,
153 .WRIntSel = LP_WRINTSELC,
156 /* to group dio devices (48 bits mask and data are not allowed ???)
157 static struct dio_private *dio_private_word[]={
164 #define devpriv ((struct s626_private *)dev->private)
165 #define diopriv ((struct dio_private *)s->private)
167 /* COUNTER OBJECT ------------------------------------------------ */
169 /* Pointers to functions that differ for A and B counters: */
170 uint16_t(*GetEnable) (struct comedi_device *dev, struct enc_private *); /* Return clock enable. */
171 uint16_t(*GetIntSrc) (struct comedi_device *dev, struct enc_private *); /* Return interrupt source. */
172 uint16_t(*GetLoadTrig) (struct comedi_device *dev, struct enc_private *); /* Return preload trigger source. */
173 uint16_t(*GetMode) (struct comedi_device *dev, struct enc_private *); /* Return standardized operating mode. */
174 void (*PulseIndex) (struct comedi_device *dev, struct enc_private *); /* Generate soft index strobe. */
175 void (*SetEnable) (struct comedi_device *dev, struct enc_private *, uint16_t enab); /* Program clock enable. */
176 void (*SetIntSrc) (struct comedi_device *dev, struct enc_private *, uint16_t IntSource); /* Program interrupt source. */
177 void (*SetLoadTrig) (struct comedi_device *dev, struct enc_private *, uint16_t Trig); /* Program preload trigger source. */
178 void (*SetMode) (struct comedi_device *dev, struct enc_private *, uint16_t Setup, uint16_t DisableIntSrc); /* Program standardized operating mode. */
179 void (*ResetCapFlags) (struct comedi_device *dev, struct enc_private *); /* Reset event capture flags. */
181 uint16_t MyCRA; /* Address of CRA register. */
182 uint16_t MyCRB; /* Address of CRB register. */
183 uint16_t MyLatchLsw; /* Address of Latch least-significant-word */
185 uint16_t MyEventBits[4]; /* Bit translations for IntSrc -->RDMISC2. */
188 #define encpriv ((struct enc_private *)(dev->subdevices+5)->private)
190 /* Counter overflow/index event flag masks for RDMISC2. */
191 #define INDXMASK(C) (1 << (((C) > 2) ? ((C) * 2 - 1) : ((C) * 2 + 4)))
192 #define OVERMASK(C) (1 << (((C) > 2) ? ((C) * 2 + 5) : ((C) * 2 + 10)))
193 #define EVBITS(C) { 0, OVERMASK(C), INDXMASK(C), OVERMASK(C) | INDXMASK(C) }
195 /* Translation table to map IntSrc into equivalent RDMISC2 event flag bits. */
196 /* static const uint16_t EventBits[][4] = { EVBITS(0), EVBITS(1), EVBITS(2), EVBITS(3), EVBITS(4), EVBITS(5) }; */
198 /* enab/disable a function or test status bit(s) that are accessed */
199 /* through Main Control Registers 1 or 2. */
200 #define MC_ENABLE(REGADRS, CTRLWORD) writel(((uint32_t)(CTRLWORD) << 16) | (uint32_t)(CTRLWORD), devpriv->base_addr+(REGADRS))
202 #define MC_DISABLE(REGADRS, CTRLWORD) writel((uint32_t)(CTRLWORD) << 16 , devpriv->base_addr+(REGADRS))
204 #define MC_TEST(REGADRS, CTRLWORD) ((readl(devpriv->base_addr+(REGADRS)) & CTRLWORD) != 0)
206 /* #define WR7146(REGARDS,CTRLWORD)
207 writel(CTRLWORD,(uint32_t)(devpriv->base_addr+(REGARDS))) */
208 #define WR7146(REGARDS, CTRLWORD) writel(CTRLWORD, devpriv->base_addr+(REGARDS))
210 /* #define RR7146(REGARDS)
211 readl((uint32_t)(devpriv->base_addr+(REGARDS))) */
212 #define RR7146(REGARDS) readl(devpriv->base_addr+(REGARDS))
214 #define BUGFIX_STREG(REGADRS) (REGADRS - 4)
216 /* Write a time slot control record to TSL2. */
217 #define VECTPORT(VECTNUM) (P_TSL2 + ((VECTNUM) << 2))
218 #define SETVECT(VECTNUM, VECTVAL) WR7146(VECTPORT(VECTNUM), (VECTVAL))
220 /* Code macros used for constructing I2C command bytes. */
221 #define I2C_B2(ATTR, VAL) (((ATTR) << 6) | ((VAL) << 24))
222 #define I2C_B1(ATTR, VAL) (((ATTR) << 4) | ((VAL) << 16))
223 #define I2C_B0(ATTR, VAL) (((ATTR) << 2) | ((VAL) << 8))
225 static const struct comedi_lrange s626_range_table = { 2, {
231 /* Execute a DEBI transfer. This must be called from within a */
232 /* critical section. */
233 static void DEBItransfer(struct comedi_device *dev)
235 /* Initiate upload of shadow RAM to DEBI control register. */
236 MC_ENABLE(P_MC2, MC2_UPLD_DEBI);
238 /* Wait for completion of upload from shadow RAM to DEBI control */
240 while (!MC_TEST(P_MC2, MC2_UPLD_DEBI))
243 /* Wait until DEBI transfer is done. */
244 while (RR7146(P_PSR) & PSR_DEBI_S)
248 /* Initialize the DEBI interface for all transfers. */
250 static uint16_t DEBIread(struct comedi_device *dev, uint16_t addr)
254 /* Set up DEBI control register value in shadow RAM. */
255 WR7146(P_DEBICMD, DEBI_CMD_RDWORD | addr);
257 /* Execute the DEBI transfer. */
260 /* Fetch target register value. */
261 retval = (uint16_t) RR7146(P_DEBIAD);
263 /* Return register value. */
267 /* Write a value to a gate array register. */
268 static void DEBIwrite(struct comedi_device *dev, uint16_t addr, uint16_t wdata)
271 /* Set up DEBI control register value in shadow RAM. */
272 WR7146(P_DEBICMD, DEBI_CMD_WRWORD | addr);
273 WR7146(P_DEBIAD, wdata);
275 /* Execute the DEBI transfer. */
279 /* Replace the specified bits in a gate array register. Imports: mask
280 * specifies bits that are to be preserved, wdata is new value to be
281 * or'd with the masked original.
283 static void DEBIreplace(struct comedi_device *dev, uint16_t addr, uint16_t mask,
287 /* Copy target gate array register into P_DEBIAD register. */
288 WR7146(P_DEBICMD, DEBI_CMD_RDWORD | addr);
289 /* Set up DEBI control reg value in shadow RAM. */
290 DEBItransfer(dev); /* Execute the DEBI Read transfer. */
292 /* Write back the modified image. */
293 WR7146(P_DEBICMD, DEBI_CMD_WRWORD | addr);
294 /* Set up DEBI control reg value in shadow RAM. */
296 WR7146(P_DEBIAD, wdata | ((uint16_t) RR7146(P_DEBIAD) & mask));
297 /* Modify the register image. */
298 DEBItransfer(dev); /* Execute the DEBI Write transfer. */
301 /* ************** EEPROM ACCESS FUNCTIONS ************** */
303 static uint32_t I2Chandshake(struct comedi_device *dev, uint32_t val)
305 /* Write I2C command to I2C Transfer Control shadow register. */
306 WR7146(P_I2CCTRL, val);
308 /* Upload I2C shadow registers into working registers and wait for */
309 /* upload confirmation. */
311 MC_ENABLE(P_MC2, MC2_UPLD_IIC);
312 while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
315 /* Wait until I2C bus transfer is finished or an error occurs. */
316 while ((RR7146(P_I2CCTRL) & (I2C_BUSY | I2C_ERR)) == I2C_BUSY)
319 /* Return non-zero if I2C error occurred. */
320 return RR7146(P_I2CCTRL) & I2C_ERR;
324 /* Read uint8_t from EEPROM. */
325 static uint8_t I2Cread(struct comedi_device *dev, uint8_t addr)
329 /* Send EEPROM target address. */
330 if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CW)
331 /* Byte2 = I2C command: write to I2C EEPROM device. */
332 | I2C_B1(I2C_ATTRSTOP, addr)
333 /* Byte1 = EEPROM internal target address. */
334 | I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
335 /* Abort function and declare error if handshake failed. */
338 /* Execute EEPROM read. */
339 if (I2Chandshake(dev, I2C_B2(I2C_ATTRSTART, I2CR)
343 /* from I2C EEPROM */
345 |I2C_B1(I2C_ATTRSTOP, 0)
350 |I2C_B0(I2C_ATTRNOP, 0))) { /* Byte0 = Not sent. */
352 /* Abort function and declare error if handshake failed. */
355 /* Return copy of EEPROM value. */
356 rtnval = (uint8_t) (RR7146(P_I2CCTRL) >> 16);
360 /* *********** DAC FUNCTIONS *********** */
362 /* Slot 0 base settings. */
363 #define VECT0 (XSD2 | RSD3 | SIB_A2)
364 /* Slot 0 always shifts in 0xFF and store it to FB_BUFFER2. */
366 /* TrimDac LogicalChan-to-PhysicalChan mapping table. */
367 static uint8_t trimchan[] = { 10, 9, 8, 3, 2, 7, 6, 1, 0, 5, 4 };
369 /* TrimDac LogicalChan-to-EepromAdrs mapping table. */
370 static uint8_t trimadrs[] = { 0x40, 0x41, 0x42, 0x50, 0x51, 0x52, 0x53, 0x60, 0x61, 0x62, 0x63 };
372 /* Private helper function: Transmit serial data to DAC via Audio
373 * channel 2. Assumes: (1) TSL2 slot records initialized, and (2)
374 * Dacpol contains valid target image.
376 static void SendDAC(struct comedi_device *dev, uint32_t val)
379 /* START THE SERIAL CLOCK RUNNING ------------- */
381 /* Assert DAC polarity control and enable gating of DAC serial clock
382 * and audio bit stream signals. At this point in time we must be
383 * assured of being in time slot 0. If we are not in slot 0, the
384 * serial clock and audio stream signals will be disabled; this is
385 * because the following DEBIwrite statement (which enables signals
386 * to be passed through the gate array) would execute before the
387 * trailing edge of WS1/WS3 (which turns off the signals), thus
388 * causing the signals to be inactive during the DAC write.
390 DEBIwrite(dev, LP_DACPOL, devpriv->Dacpol);
392 /* TRANSFER OUTPUT DWORD VALUE INTO A2'S OUTPUT FIFO ---------------- */
394 /* Copy DAC setpoint value to DAC's output DMA buffer. */
396 /* WR7146( (uint32_t)devpriv->pDacWBuf, val ); */
397 *devpriv->pDacWBuf = val;
399 /* enab the output DMA transfer. This will cause the DMAC to copy
400 * the DAC's data value to A2's output FIFO. The DMA transfer will
401 * then immediately terminate because the protection address is
402 * reached upon transfer of the first DWORD value.
404 MC_ENABLE(P_MC1, MC1_A2OUT);
406 /* While the DMA transfer is executing ... */
408 /* Reset Audio2 output FIFO's underflow flag (along with any other
409 * FIFO underflow/overflow flags). When set, this flag will
410 * indicate that we have emerged from slot 0.
412 WR7146(P_ISR, ISR_AFOU);
414 /* Wait for the DMA transfer to finish so that there will be data
415 * available in the FIFO when time slot 1 tries to transfer a DWORD
416 * from the FIFO to the output buffer register. We test for DMA
417 * Done by polling the DMAC enable flag; this flag is automatically
418 * cleared when the transfer has finished.
420 while ((RR7146(P_MC1) & MC1_A2OUT) != 0)
423 /* START THE OUTPUT STREAM TO THE TARGET DAC -------------------- */
425 /* FIFO data is now available, so we enable execution of time slots
426 * 1 and higher by clearing the EOS flag in slot 0. Note that SD3
427 * will be shifted in and stored in FB_BUFFER2 for end-of-slot-list
430 SETVECT(0, XSD2 | RSD3 | SIB_A2);
432 /* Wait for slot 1 to execute to ensure that the Packet will be
433 * transmitted. This is detected by polling the Audio2 output FIFO
434 * underflow flag, which will be set when slot 1 execution has
435 * finished transferring the DAC's data DWORD from the output FIFO
436 * to the output buffer register.
438 while ((RR7146(P_SSR) & SSR_AF2_OUT) == 0)
441 /* Set up to trap execution at slot 0 when the TSL sequencer cycles
442 * back to slot 0 after executing the EOS in slot 5. Also,
443 * simultaneously shift out and in the 0x00 that is ALWAYS the value
444 * stored in the last byte to be shifted out of the FIFO's DWORD
447 SETVECT(0, XSD2 | XFIFO_2 | RSD2 | SIB_A2 | EOS);
449 /* WAIT FOR THE TRANSACTION TO FINISH ----------------------- */
451 /* Wait for the TSL to finish executing all time slots before
452 * exiting this function. We must do this so that the next DAC
453 * write doesn't start, thereby enabling clock/chip select signals:
455 * 1. Before the TSL sequence cycles back to slot 0, which disables
456 * the clock/cs signal gating and traps slot // list execution.
457 * we have not yet finished slot 5 then the clock/cs signals are
458 * still gated and we have not finished transmitting the stream.
460 * 2. While slots 2-5 are executing due to a late slot 0 trap. In
461 * this case, the slot sequence is currently repeating, but with
462 * clock/cs signals disabled. We must wait for slot 0 to trap
463 * execution before setting up the next DAC setpoint DMA transfer
464 * and enabling the clock/cs signals. To detect the end of slot 5,
465 * we test for the FB_BUFFER2 MSB contents to be equal to 0xFF. If
466 * the TSL has not yet finished executing slot 5 ...
468 if ((RR7146(P_FB_BUFFER2) & 0xFF000000) != 0) {
469 /* The trap was set on time and we are still executing somewhere
470 * in slots 2-5, so we now wait for slot 0 to execute and trap
471 * TSL execution. This is detected when FB_BUFFER2 MSB changes
472 * from 0xFF to 0x00, which slot 0 causes to happen by shifting
473 * out/in on SD2 the 0x00 that is always referenced by slot 5.
475 while ((RR7146(P_FB_BUFFER2) & 0xFF000000) != 0)
478 /* Either (1) we were too late setting the slot 0 trap; the TSL
479 * sequencer restarted slot 0 before we could set the EOS trap flag,
480 * or (2) we were not late and execution is now trapped at slot 0.
481 * In either case, we must now change slot 0 so that it will store
482 * value 0xFF (instead of 0x00) to FB_BUFFER2 next time it executes.
483 * In order to do this, we reprogram slot 0 so that it will shift in
484 * SD3, which is driven only by a pull-up resistor.
486 SETVECT(0, RSD3 | SIB_A2 | EOS);
488 /* Wait for slot 0 to execute, at which time the TSL is setup for
489 * the next DAC write. This is detected when FB_BUFFER2 MSB changes
492 while ((RR7146(P_FB_BUFFER2) & 0xFF000000) == 0)
496 /* Private helper function: Write setpoint to an application DAC channel. */
497 static void SetDAC(struct comedi_device *dev, uint16_t chan, short dacdata)
499 register uint16_t signmask;
500 register uint32_t WSImage;
502 /* Adjust DAC data polarity and set up Polarity Control Register */
504 signmask = 1 << chan;
507 devpriv->Dacpol |= signmask;
509 devpriv->Dacpol &= ~signmask;
511 /* Limit DAC setpoint value to valid range. */
512 if ((uint16_t) dacdata > 0x1FFF)
515 /* Set up TSL2 records (aka "vectors") for DAC update. Vectors V2
516 * and V3 transmit the setpoint to the target DAC. V4 and V5 send
517 * data to a non-existent TrimDac channel just to keep the clock
518 * running after sending data to the target DAC. This is necessary
519 * to eliminate the clock glitch that would otherwise occur at the
520 * end of the target DAC's serial data stream. When the sequence
521 * restarts at V0 (after executing V5), the gate array automatically
522 * disables gating for the DAC clock and all DAC chip selects.
525 WSImage = (chan & 2) ? WS1 : WS2;
526 /* Choose DAC chip select to be asserted. */
527 SETVECT(2, XSD2 | XFIFO_1 | WSImage);
528 /* Slot 2: Transmit high data byte to target DAC. */
529 SETVECT(3, XSD2 | XFIFO_0 | WSImage);
530 /* Slot 3: Transmit low data byte to target DAC. */
531 SETVECT(4, XSD2 | XFIFO_3 | WS3);
532 /* Slot 4: Transmit to non-existent TrimDac channel to keep clock */
533 SETVECT(5, XSD2 | XFIFO_2 | WS3 | EOS);
534 /* Slot 5: running after writing target DAC's low data byte. */
536 /* Construct and transmit target DAC's serial packet:
537 * ( A10D DDDD ),( DDDD DDDD ),( 0x0F ),( 0x00 ) where A is chan<0>,
538 * and D<12:0> is the DAC setpoint. Append a WORD value (that writes
539 * to a non-existent TrimDac channel) that serves to keep the clock
540 * running after the packet has been sent to the target DAC.
542 SendDAC(dev, 0x0F000000
543 /* Continue clock after target DAC data (write to non-existent trimdac). */
545 /* Address the two main dual-DAC devices (TSL's chip select enables
547 | ((uint32_t) (chan & 1) << 15)
548 /* Address the DAC channel within the device. */
549 | (uint32_t) dacdata); /* Include DAC setpoint data. */
553 static void WriteTrimDAC(struct comedi_device *dev, uint8_t LogicalChan,
558 /* Save the new setpoint in case the application needs to read it back later. */
559 devpriv->TrimSetpoint[LogicalChan] = (uint8_t) DacData;
561 /* Map logical channel number to physical channel number. */
562 chan = (uint32_t) trimchan[LogicalChan];
564 /* Set up TSL2 records for TrimDac write operation. All slots shift
565 * 0xFF in from pulled-up SD3 so that the end of the slot sequence
569 SETVECT(2, XSD2 | XFIFO_1 | WS3);
570 /* Slot 2: Send high uint8_t to target TrimDac. */
571 SETVECT(3, XSD2 | XFIFO_0 | WS3);
572 /* Slot 3: Send low uint8_t to target TrimDac. */
573 SETVECT(4, XSD2 | XFIFO_3 | WS1);
574 /* Slot 4: Send NOP high uint8_t to DAC0 to keep clock running. */
575 SETVECT(5, XSD2 | XFIFO_2 | WS1 | EOS);
576 /* Slot 5: Send NOP low uint8_t to DAC0. */
578 /* Construct and transmit target DAC's serial packet:
579 * ( 0000 AAAA ), ( DDDD DDDD ),( 0x00 ),( 0x00 ) where A<3:0> is the
580 * DAC channel's address, and D<7:0> is the DAC setpoint. Append a
581 * WORD value (that writes a channel 0 NOP command to a non-existent
582 * main DAC channel) that serves to keep the clock running after the
583 * packet has been sent to the target DAC.
586 /* Address the DAC channel within the trimdac device. */
587 SendDAC(dev, ((uint32_t) chan << 8)
588 | (uint32_t) DacData); /* Include DAC setpoint data. */
591 static void LoadTrimDACs(struct comedi_device *dev)
595 /* Copy TrimDac setpoint values from EEPROM to TrimDacs. */
596 for (i = 0; i < ARRAY_SIZE(trimchan); i++)
597 WriteTrimDAC(dev, i, I2Cread(dev, trimadrs[i]));
600 /* ****** COUNTER FUNCTIONS ******* */
601 /* All counter functions address a specific counter by means of the
602 * "Counter" argument, which is a logical counter number. The Counter
603 * argument may have any of the following legal values: 0=0A, 1=1A,
604 * 2=2A, 3=0B, 4=1B, 5=2B.
607 /* Read a counter's output latch. */
608 static uint32_t ReadLatch(struct comedi_device *dev, struct enc_private *k)
610 register uint32_t value;
612 /* Latch counts and fetch LSW of latched counts value. */
613 value = (uint32_t) DEBIread(dev, k->MyLatchLsw);
615 /* Fetch MSW of latched counts and combine with LSW. */
616 value |= ((uint32_t) DEBIread(dev, k->MyLatchLsw + 2) << 16);
618 /* Return latched counts. */
622 /* Return/set a counter pair's latch trigger source. 0: On read
623 * access, 1: A index latches A, 2: B index latches B, 3: A overflow
626 static void SetLatchSource(struct comedi_device *dev, struct enc_private *k,
629 DEBIreplace(dev, k->MyCRB,
630 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_LATCHSRC)),
631 (uint16_t) (value << CRBBIT_LATCHSRC));
634 /* Write value into counter preload register. */
635 static void Preload(struct comedi_device *dev, struct enc_private *k,
638 DEBIwrite(dev, (uint16_t) (k->MyLatchLsw), (uint16_t) value);
639 DEBIwrite(dev, (uint16_t) (k->MyLatchLsw + 2),
640 (uint16_t) (value >> 16));
643 static unsigned int s626_ai_reg_to_uint(int data)
645 unsigned int tempdata;
647 tempdata = (data >> 18);
648 if (tempdata & 0x2000)
651 tempdata += (1 << 13);
656 /* static unsigned int s626_uint_to_reg(struct comedi_subdevice *s, int data){ */
660 static int s626_dio_set_irq(struct comedi_device *dev, unsigned int chan)
663 unsigned int bitmask;
666 /* select dio bank */
668 bitmask = 1 << (chan - (16 * group));
670 /* set channel to capture positive edge */
671 status = DEBIread(dev,
672 ((struct dio_private *)(dev->subdevices + 2 +
673 group)->private)->RDEdgSel);
675 ((struct dio_private *)(dev->subdevices + 2 +
676 group)->private)->WREdgSel,
679 /* enable interrupt on selected channel */
680 status = DEBIread(dev,
681 ((struct dio_private *)(dev->subdevices + 2 +
682 group)->private)->RDIntSel);
684 ((struct dio_private *)(dev->subdevices + 2 +
685 group)->private)->WRIntSel,
688 /* enable edge capture write command */
689 DEBIwrite(dev, LP_MISC1, MISC1_EDCAP);
691 /* enable edge capture on selected channel */
692 status = DEBIread(dev,
693 ((struct dio_private *)(dev->subdevices + 2 +
694 group)->private)->RDCapSel);
696 ((struct dio_private *)(dev->subdevices + 2 +
697 group)->private)->WRCapSel,
703 static int s626_dio_reset_irq(struct comedi_device *dev, unsigned int group,
706 /* disable edge capture write command */
707 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
709 /* enable edge capture on selected channel */
711 ((struct dio_private *)(dev->subdevices + 2 +
712 group)->private)->WRCapSel, mask);
717 static int s626_dio_clear_irq(struct comedi_device *dev)
721 /* disable edge capture write command */
722 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
724 for (group = 0; group < S626_DIO_BANKS; group++) {
725 /* clear pending events and interrupt */
727 ((struct dio_private *)(dev->subdevices + 2 +
728 group)->private)->WRCapSel,
735 static irqreturn_t s626_irq_handler(int irq, void *d)
737 struct comedi_device *dev = d;
738 struct comedi_subdevice *s;
739 struct comedi_cmd *cmd;
740 struct enc_private *k;
743 uint32_t irqtype, irqstatus;
749 if (dev->attached == 0)
751 /* lock to avoid race with comedi_poll */
752 spin_lock_irqsave(&dev->spinlock, flags);
754 /* save interrupt enable register state */
755 irqstatus = readl(devpriv->base_addr + P_IER);
757 /* read interrupt type */
758 irqtype = readl(devpriv->base_addr + P_ISR);
760 /* disable master interrupt */
761 writel(0, devpriv->base_addr + P_IER);
763 /* clear interrupt */
764 writel(irqtype, devpriv->base_addr + P_ISR);
767 case IRQ_RPS1: /* end_of_scan occurs */
768 /* manage ai subdevice */
770 cmd = &(s->async->cmd);
772 /* Init ptr to DMA buffer that holds new ADC data. We skip the
773 * first uint16_t in the buffer because it contains junk data from
774 * the final ADC of the previous poll list scan.
776 readaddr = (int32_t *) devpriv->ANABuf.LogicalBase + 1;
778 /* get the data and hand it over to comedi */
779 for (i = 0; i < (s->async->cmd.chanlist_len); i++) {
780 /* Convert ADC data to 16-bit integer values and copy to application */
782 tempdata = s626_ai_reg_to_uint((int)*readaddr);
785 /* put data into read buffer */
786 /* comedi_buf_put(s->async, tempdata); */
787 if (cfc_write_to_buffer(s, tempdata) == 0)
789 ("s626_irq_handler: cfc_write_to_buffer error!\n");
792 /* end of scan occurs */
793 s->async->events |= COMEDI_CB_EOS;
795 if (!(devpriv->ai_continous))
796 devpriv->ai_sample_count--;
797 if (devpriv->ai_sample_count <= 0) {
798 devpriv->ai_cmd_running = 0;
800 /* Stop RPS program. */
801 MC_DISABLE(P_MC1, MC1_ERPS1);
803 /* send end of acquisition */
804 s->async->events |= COMEDI_CB_EOA;
806 /* disable master interrupt */
810 if (devpriv->ai_cmd_running && cmd->scan_begin_src == TRIG_EXT)
811 s626_dio_set_irq(dev, cmd->scan_begin_arg);
812 /* tell comedi that data is there */
813 comedi_event(dev, s);
815 case IRQ_GPIO3: /* check dio and conter interrupt */
816 /* manage ai subdevice */
818 cmd = &(s->async->cmd);
820 /* s626_dio_clear_irq(dev); */
822 for (group = 0; group < S626_DIO_BANKS; group++) {
824 /* read interrupt type */
825 irqbit = DEBIread(dev,
826 ((struct dio_private *)(dev->
832 /* check if interrupt is generated from dio channels */
834 s626_dio_reset_irq(dev, group, irqbit);
835 if (devpriv->ai_cmd_running) {
836 /* check if interrupt is an ai acquisition start trigger */
837 if ((irqbit >> (cmd->start_arg -
839 == 1 && cmd->start_src == TRIG_EXT) {
840 /* Start executing the RPS program. */
841 MC_ENABLE(P_MC1, MC1_ERPS1);
843 if (cmd->scan_begin_src ==
845 s626_dio_set_irq(dev,
846 cmd->scan_begin_arg);
849 if ((irqbit >> (cmd->scan_begin_arg -
852 && cmd->scan_begin_src ==
854 /* Trigger ADC scan loop start by setting RPS Signal 0. */
855 MC_ENABLE(P_MC2, MC2_ADC_RPS);
857 if (cmd->convert_src ==
859 devpriv->ai_convert_count
862 s626_dio_set_irq(dev,
866 if (cmd->convert_src ==
869 devpriv->ai_convert_count
875 if ((irqbit >> (cmd->convert_arg -
878 && cmd->convert_src == TRIG_EXT) {
879 /* Trigger ADC scan loop start by setting RPS Signal 0. */
880 MC_ENABLE(P_MC2, MC2_ADC_RPS);
882 devpriv->ai_convert_count--;
884 if (devpriv->ai_convert_count >
886 s626_dio_set_irq(dev,
895 /* read interrupt type */
896 irqbit = DEBIread(dev, LP_RDMISC2);
898 /* check interrupt on counters */
899 if (irqbit & IRQ_COINT1A) {
902 /* clear interrupt capture flag */
903 k->ResetCapFlags(dev, k);
905 if (irqbit & IRQ_COINT2A) {
908 /* clear interrupt capture flag */
909 k->ResetCapFlags(dev, k);
911 if (irqbit & IRQ_COINT3A) {
914 /* clear interrupt capture flag */
915 k->ResetCapFlags(dev, k);
917 if (irqbit & IRQ_COINT1B) {
920 /* clear interrupt capture flag */
921 k->ResetCapFlags(dev, k);
923 if (irqbit & IRQ_COINT2B) {
926 /* clear interrupt capture flag */
927 k->ResetCapFlags(dev, k);
929 if (devpriv->ai_convert_count > 0) {
930 devpriv->ai_convert_count--;
931 if (devpriv->ai_convert_count == 0)
932 k->SetEnable(dev, k, CLKENAB_INDEX);
934 if (cmd->convert_src == TRIG_TIMER) {
935 /* Trigger ADC scan loop start by setting RPS Signal 0. */
936 MC_ENABLE(P_MC2, MC2_ADC_RPS);
940 if (irqbit & IRQ_COINT3B) {
943 /* clear interrupt capture flag */
944 k->ResetCapFlags(dev, k);
946 if (cmd->scan_begin_src == TRIG_TIMER) {
947 /* Trigger ADC scan loop start by setting RPS Signal 0. */
948 MC_ENABLE(P_MC2, MC2_ADC_RPS);
951 if (cmd->convert_src == TRIG_TIMER) {
953 devpriv->ai_convert_count = cmd->chanlist_len;
954 k->SetEnable(dev, k, CLKENAB_ALWAYS);
959 /* enable interrupt */
960 writel(irqstatus, devpriv->base_addr + P_IER);
962 spin_unlock_irqrestore(&dev->spinlock, flags);
967 * this functions build the RPS program for hardware driven acquistion
969 static void ResetADC(struct comedi_device *dev, uint8_t *ppl)
971 register uint32_t *pRPS;
976 struct comedi_cmd *cmd = &(dev->subdevices->async->cmd);
978 /* Stop RPS program in case it is currently running. */
979 MC_DISABLE(P_MC1, MC1_ERPS1);
981 /* Set starting logical address to write RPS commands. */
982 pRPS = (uint32_t *) devpriv->RPSBuf.LogicalBase;
984 /* Initialize RPS instruction pointer. */
985 WR7146(P_RPSADDR1, (uint32_t) devpriv->RPSBuf.PhysicalBase);
987 /* Construct RPS program in RPSBuf DMA buffer */
989 if (cmd != NULL && cmd->scan_begin_src != TRIG_FOLLOW) {
990 /* Wait for Start trigger. */
991 *pRPS++ = RPS_PAUSE | RPS_SIGADC;
992 *pRPS++ = RPS_CLRSIGNAL | RPS_SIGADC;
995 /* SAA7146 BUG WORKAROUND Do a dummy DEBI Write. This is necessary
996 * because the first RPS DEBI Write following a non-RPS DEBI write
997 * seems to always fail. If we don't do this dummy write, the ADC
998 * gain might not be set to the value required for the first slot in
999 * the poll list; the ADC gain would instead remain unchanged from
1000 * the previously programmed value.
1002 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2);
1003 /* Write DEBI Write command and address to shadow RAM. */
1005 *pRPS++ = DEBI_CMD_WRWORD | LP_GSEL;
1006 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2);
1007 /* Write DEBI immediate data to shadow RAM: */
1009 *pRPS++ = GSEL_BIPOLAR5V;
1010 /* arbitrary immediate data value. */
1012 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI;
1013 /* Reset "shadow RAM uploaded" flag. */
1014 *pRPS++ = RPS_UPLOAD | RPS_DEBI; /* Invoke shadow RAM upload. */
1015 *pRPS++ = RPS_PAUSE | RPS_DEBI; /* Wait for shadow upload to finish. */
1017 /* Digitize all slots in the poll list. This is implemented as a
1018 * for loop to limit the slot count to 16 in case the application
1019 * forgot to set the EOPL flag in the final slot.
1021 for (devpriv->AdcItems = 0; devpriv->AdcItems < 16; devpriv->AdcItems++) {
1022 /* Convert application's poll list item to private board class
1023 * format. Each app poll list item is an uint8_t with form
1024 * (EOPL,x,x,RANGE,CHAN<3:0>), where RANGE code indicates 0 =
1025 * +-10V, 1 = +-5V, and EOPL = End of Poll List marker.
1028 (*ppl << 8) | (*ppl & 0x10 ? GSEL_BIPOLAR5V :
1031 /* Switch ADC analog gain. */
1032 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2); /* Write DEBI command */
1033 /* and address to */
1035 *pRPS++ = DEBI_CMD_WRWORD | LP_GSEL;
1036 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2); /* Write DEBI */
1037 /* immediate data to */
1040 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI; /* Reset "shadow RAM uploaded" */
1042 *pRPS++ = RPS_UPLOAD | RPS_DEBI; /* Invoke shadow RAM upload. */
1043 *pRPS++ = RPS_PAUSE | RPS_DEBI; /* Wait for shadow upload to */
1046 /* Select ADC analog input channel. */
1047 *pRPS++ = RPS_LDREG | (P_DEBICMD >> 2);
1048 /* Write DEBI command and address to shadow RAM. */
1049 *pRPS++ = DEBI_CMD_WRWORD | LP_ISEL;
1050 *pRPS++ = RPS_LDREG | (P_DEBIAD >> 2);
1051 /* Write DEBI immediate data to shadow RAM. */
1053 *pRPS++ = RPS_CLRSIGNAL | RPS_DEBI;
1054 /* Reset "shadow RAM uploaded" flag. */
1056 *pRPS++ = RPS_UPLOAD | RPS_DEBI;
1057 /* Invoke shadow RAM upload. */
1059 *pRPS++ = RPS_PAUSE | RPS_DEBI;
1060 /* Wait for shadow upload to finish. */
1062 /* Delay at least 10 microseconds for analog input settling.
1063 * Instead of padding with NOPs, we use RPS_JUMP instructions
1064 * here; this allows us to produce a longer delay than is
1065 * possible with NOPs because each RPS_JUMP flushes the RPS'
1066 * instruction prefetch pipeline.
1069 (uint32_t) devpriv->RPSBuf.PhysicalBase +
1070 (uint32_t) ((unsigned long)pRPS -
1071 (unsigned long)devpriv->RPSBuf.LogicalBase);
1072 for (i = 0; i < (10 * RPSCLK_PER_US / 2); i++) {
1073 JmpAdrs += 8; /* Repeat to implement time delay: */
1074 *pRPS++ = RPS_JUMP; /* Jump to next RPS instruction. */
1078 if (cmd != NULL && cmd->convert_src != TRIG_NOW) {
1079 /* Wait for Start trigger. */
1080 *pRPS++ = RPS_PAUSE | RPS_SIGADC;
1081 *pRPS++ = RPS_CLRSIGNAL | RPS_SIGADC;
1083 /* Start ADC by pulsing GPIO1. */
1084 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* Begin ADC Start pulse. */
1085 *pRPS++ = GPIO_BASE | GPIO1_LO;
1087 /* VERSION 2.03 CHANGE: STRETCH OUT ADC START PULSE. */
1088 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* End ADC Start pulse. */
1089 *pRPS++ = GPIO_BASE | GPIO1_HI;
1091 /* Wait for ADC to complete (GPIO2 is asserted high when ADC not
1092 * busy) and for data from previous conversion to shift into FB
1093 * BUFFER 1 register.
1095 *pRPS++ = RPS_PAUSE | RPS_GPIO2; /* Wait for ADC done. */
1097 /* Transfer ADC data from FB BUFFER 1 register to DMA buffer. */
1098 *pRPS++ = RPS_STREG | (BUGFIX_STREG(P_FB_BUFFER1) >> 2);
1100 (uint32_t) devpriv->ANABuf.PhysicalBase +
1101 (devpriv->AdcItems << 2);
1103 /* If this slot's EndOfPollList flag is set, all channels have */
1104 /* now been processed. */
1105 if (*ppl++ & EOPL) {
1106 devpriv->AdcItems++; /* Adjust poll list item count. */
1107 break; /* Exit poll list processing loop. */
1111 /* VERSION 2.01 CHANGE: DELAY CHANGED FROM 250NS to 2US. Allow the
1112 * ADC to stabilize for 2 microseconds before starting the final
1113 * (dummy) conversion. This delay is necessary to allow sufficient
1114 * time between last conversion finished and the start of the dummy
1115 * conversion. Without this delay, the last conversion's data value
1116 * is sometimes set to the previous conversion's data value.
1118 for (n = 0; n < (2 * RPSCLK_PER_US); n++)
1121 /* Start a dummy conversion to cause the data from the last
1122 * conversion of interest to be shifted in.
1124 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* Begin ADC Start pulse. */
1125 *pRPS++ = GPIO_BASE | GPIO1_LO;
1127 /* VERSION 2.03 CHANGE: STRETCH OUT ADC START PULSE. */
1128 *pRPS++ = RPS_LDREG | (P_GPIO >> 2); /* End ADC Start pulse. */
1129 *pRPS++ = GPIO_BASE | GPIO1_HI;
1131 /* Wait for the data from the last conversion of interest to arrive
1132 * in FB BUFFER 1 register.
1134 *pRPS++ = RPS_PAUSE | RPS_GPIO2; /* Wait for ADC done. */
1136 /* Transfer final ADC data from FB BUFFER 1 register to DMA buffer. */
1137 *pRPS++ = RPS_STREG | (BUGFIX_STREG(P_FB_BUFFER1) >> 2); /* */
1139 (uint32_t) devpriv->ANABuf.PhysicalBase + (devpriv->AdcItems << 2);
1141 /* Indicate ADC scan loop is finished. */
1142 /* *pRPS++= RPS_CLRSIGNAL | RPS_SIGADC ; // Signal ReadADC() that scan is done. */
1144 /* invoke interrupt */
1145 if (devpriv->ai_cmd_running == 1) {
1148 /* Restart RPS program at its beginning. */
1149 *pRPS++ = RPS_JUMP; /* Branch to start of RPS program. */
1150 *pRPS++ = (uint32_t) devpriv->RPSBuf.PhysicalBase;
1152 /* End of RPS program build */
1155 /* TO COMPLETE, IF NECESSARY */
1156 static int s626_ai_insn_config(struct comedi_device *dev,
1157 struct comedi_subdevice *s,
1158 struct comedi_insn *insn, unsigned int *data)
1164 /* static int s626_ai_rinsn(struct comedi_device *dev,struct comedi_subdevice *s,struct comedi_insn *insn,unsigned int *data) */
1166 /* register uint8_t i; */
1167 /* register int32_t *readaddr; */
1169 /* Trigger ADC scan loop start by setting RPS Signal 0. */
1170 /* MC_ENABLE( P_MC2, MC2_ADC_RPS ); */
1172 /* Wait until ADC scan loop is finished (RPS Signal 0 reset). */
1173 /* while ( MC_TEST( P_MC2, MC2_ADC_RPS ) ); */
1175 /* Init ptr to DMA buffer that holds new ADC data. We skip the
1176 * first uint16_t in the buffer because it contains junk data from
1177 * the final ADC of the previous poll list scan.
1179 /* readaddr = (uint32_t *)devpriv->ANABuf.LogicalBase + 1; */
1181 /* Convert ADC data to 16-bit integer values and copy to application buffer. */
1182 /* for ( i = 0; i < devpriv->AdcItems; i++ ) { */
1183 /* *data = s626_ai_reg_to_uint( *readaddr++ ); */
1190 static int s626_ai_insn_read(struct comedi_device *dev,
1191 struct comedi_subdevice *s,
1192 struct comedi_insn *insn, unsigned int *data)
1194 uint16_t chan = CR_CHAN(insn->chanspec);
1195 uint16_t range = CR_RANGE(insn->chanspec);
1196 uint16_t AdcSpec = 0;
1200 /* interrupt call test */
1201 /* writel(IRQ_GPIO3,devpriv->base_addr+P_PSR); */
1202 /* Writing a logical 1 into any of the RPS_PSR bits causes the
1203 * corresponding interrupt to be generated if enabled
1206 /* Convert application's ADC specification into form
1207 * appropriate for register programming.
1210 AdcSpec = (chan << 8) | (GSEL_BIPOLAR5V);
1212 AdcSpec = (chan << 8) | (GSEL_BIPOLAR10V);
1214 /* Switch ADC analog gain. */
1215 DEBIwrite(dev, LP_GSEL, AdcSpec); /* Set gain. */
1217 /* Select ADC analog input channel. */
1218 DEBIwrite(dev, LP_ISEL, AdcSpec); /* Select channel. */
1220 for (n = 0; n < insn->n; n++) {
1222 /* Delay 10 microseconds for analog input settling. */
1225 /* Start ADC by pulsing GPIO1 low. */
1226 GpioImage = RR7146(P_GPIO);
1227 /* Assert ADC Start command */
1228 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1229 /* and stretch it out. */
1230 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1231 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1232 /* Negate ADC Start command. */
1233 WR7146(P_GPIO, GpioImage | GPIO1_HI);
1235 /* Wait for ADC to complete (GPIO2 is asserted high when */
1236 /* ADC not busy) and for data from previous conversion to */
1237 /* shift into FB BUFFER 1 register. */
1239 /* Wait for ADC done. */
1240 while (!(RR7146(P_PSR) & PSR_GPIO2))
1243 /* Fetch ADC data. */
1245 data[n - 1] = s626_ai_reg_to_uint(RR7146(P_FB_BUFFER1));
1247 /* Allow the ADC to stabilize for 4 microseconds before
1248 * starting the next (final) conversion. This delay is
1249 * necessary to allow sufficient time between last
1250 * conversion finished and the start of the next
1251 * conversion. Without this delay, the last conversion's
1252 * data value is sometimes set to the previous
1253 * conversion's data value.
1258 /* Start a dummy conversion to cause the data from the
1259 * previous conversion to be shifted in. */
1260 GpioImage = RR7146(P_GPIO);
1262 /* Assert ADC Start command */
1263 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1264 /* and stretch it out. */
1265 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1266 WR7146(P_GPIO, GpioImage & ~GPIO1_HI);
1267 /* Negate ADC Start command. */
1268 WR7146(P_GPIO, GpioImage | GPIO1_HI);
1270 /* Wait for the data to arrive in FB BUFFER 1 register. */
1272 /* Wait for ADC done. */
1273 while (!(RR7146(P_PSR) & PSR_GPIO2))
1276 /* Fetch ADC data from audio interface's input shift register. */
1278 /* Fetch ADC data. */
1280 data[n - 1] = s626_ai_reg_to_uint(RR7146(P_FB_BUFFER1));
1285 static int s626_ai_load_polllist(uint8_t *ppl, struct comedi_cmd *cmd)
1290 for (n = 0; n < cmd->chanlist_len; n++) {
1291 if (CR_RANGE((cmd->chanlist)[n]) == 0)
1292 ppl[n] = (CR_CHAN((cmd->chanlist)[n])) | (RANGE_5V);
1294 ppl[n] = (CR_CHAN((cmd->chanlist)[n])) | (RANGE_10V);
1302 static int s626_ai_inttrig(struct comedi_device *dev,
1303 struct comedi_subdevice *s, unsigned int trignum)
1308 /* Start executing the RPS program. */
1309 MC_ENABLE(P_MC1, MC1_ERPS1);
1311 s->async->inttrig = NULL;
1316 /* This function doesn't require a particular form, this is just what
1317 * happens to be used in some of the drivers. It should convert ns
1318 * nanoseconds to a counter value suitable for programming the device.
1319 * Also, it should adjust ns so that it cooresponds to the actual time
1320 * that the device will use. */
1321 static int s626_ns_to_timer(int *nanosec, int round_mode)
1325 base = 500; /* 2MHz internal clock */
1327 switch (round_mode) {
1328 case TRIG_ROUND_NEAREST:
1330 divider = (*nanosec + base / 2) / base;
1332 case TRIG_ROUND_DOWN:
1333 divider = (*nanosec) / base;
1336 divider = (*nanosec + base - 1) / base;
1340 *nanosec = base * divider;
1344 static void s626_timer_load(struct comedi_device *dev, struct enc_private *k,
1347 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
1349 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
1350 (CLKSRC_TIMER << BF_CLKSRC) | /* Operating mode is Timer. */
1351 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
1352 (CNTDIR_DOWN << BF_CLKPOL) | /* Count direction is Down. */
1353 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
1354 (CLKENAB_INDEX << BF_CLKENAB);
1355 uint16_t valueSrclatch = LATCHSRC_A_INDXA;
1356 /* uint16_t enab=CLKENAB_ALWAYS; */
1358 k->SetMode(dev, k, Setup, FALSE);
1360 /* Set the preload register */
1361 Preload(dev, k, tick);
1363 /* Software index pulse forces the preload register to load */
1364 /* into the counter */
1365 k->SetLoadTrig(dev, k, 0);
1366 k->PulseIndex(dev, k);
1368 /* set reload on counter overflow */
1369 k->SetLoadTrig(dev, k, 1);
1371 /* set interrupt on overflow */
1372 k->SetIntSrc(dev, k, INTSRC_OVER);
1374 SetLatchSource(dev, k, valueSrclatch);
1375 /* k->SetEnable(dev,k,(uint16_t)(enab != 0)); */
1379 static int s626_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1383 struct comedi_cmd *cmd = &s->async->cmd;
1384 struct enc_private *k;
1387 if (devpriv->ai_cmd_running) {
1388 printk(KERN_ERR "s626_ai_cmd: Another ai_cmd is running %d\n",
1392 /* disable interrupt */
1393 writel(0, devpriv->base_addr + P_IER);
1395 /* clear interrupt request */
1396 writel(IRQ_RPS1 | IRQ_GPIO3, devpriv->base_addr + P_ISR);
1398 /* clear any pending interrupt */
1399 s626_dio_clear_irq(dev);
1400 /* s626_enc_clear_irq(dev); */
1402 /* reset ai_cmd_running flag */
1403 devpriv->ai_cmd_running = 0;
1405 /* test if cmd is valid */
1409 if (dev->irq == 0) {
1411 "s626_ai_cmd: cannot run command without an irq");
1415 s626_ai_load_polllist(ppl, cmd);
1416 devpriv->ai_cmd_running = 1;
1417 devpriv->ai_convert_count = 0;
1419 switch (cmd->scan_begin_src) {
1423 /* set a conter to generate adc trigger at scan_begin_arg interval */
1425 tick = s626_ns_to_timer((int *)&cmd->scan_begin_arg,
1426 cmd->flags & TRIG_ROUND_MASK);
1428 /* load timer value and enable interrupt */
1429 s626_timer_load(dev, k, tick);
1430 k->SetEnable(dev, k, CLKENAB_ALWAYS);
1433 /* set the digital line and interrupt for scan trigger */
1434 if (cmd->start_src != TRIG_EXT)
1435 s626_dio_set_irq(dev, cmd->scan_begin_arg);
1439 switch (cmd->convert_src) {
1443 /* set a conter to generate adc trigger at convert_arg interval */
1445 tick = s626_ns_to_timer((int *)&cmd->convert_arg,
1446 cmd->flags & TRIG_ROUND_MASK);
1448 /* load timer value and enable interrupt */
1449 s626_timer_load(dev, k, tick);
1450 k->SetEnable(dev, k, CLKENAB_INDEX);
1453 /* set the digital line and interrupt for convert trigger */
1454 if (cmd->scan_begin_src != TRIG_EXT
1455 && cmd->start_src == TRIG_EXT)
1456 s626_dio_set_irq(dev, cmd->convert_arg);
1460 switch (cmd->stop_src) {
1462 /* data arrives as one packet */
1463 devpriv->ai_sample_count = cmd->stop_arg;
1464 devpriv->ai_continous = 0;
1467 /* continous acquisition */
1468 devpriv->ai_continous = 1;
1469 devpriv->ai_sample_count = 0;
1475 switch (cmd->start_src) {
1477 /* Trigger ADC scan loop start by setting RPS Signal 0. */
1478 /* MC_ENABLE( P_MC2, MC2_ADC_RPS ); */
1480 /* Start executing the RPS program. */
1481 MC_ENABLE(P_MC1, MC1_ERPS1);
1483 s->async->inttrig = NULL;
1486 /* configure DIO channel for acquisition trigger */
1487 s626_dio_set_irq(dev, cmd->start_arg);
1489 s->async->inttrig = NULL;
1492 s->async->inttrig = s626_ai_inttrig;
1496 /* enable interrupt */
1497 writel(IRQ_GPIO3 | IRQ_RPS1, devpriv->base_addr + P_IER);
1502 static int s626_ai_cmdtest(struct comedi_device *dev,
1503 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1508 /* Step 1 : check if triggers are trivially valid */
1510 err |= cfc_check_trigger_src(&cmd->start_src,
1511 TRIG_NOW | TRIG_INT | TRIG_EXT);
1512 err |= cfc_check_trigger_src(&cmd->scan_begin_src,
1513 TRIG_TIMER | TRIG_EXT | TRIG_FOLLOW);
1514 err |= cfc_check_trigger_src(&cmd->convert_src,
1515 TRIG_TIMER | TRIG_EXT | TRIG_NOW);
1516 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1517 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
1522 /* Step 2a : make sure trigger sources are unique */
1524 err |= cfc_check_trigger_is_unique(cmd->start_src);
1525 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
1526 err |= cfc_check_trigger_is_unique(cmd->convert_src);
1527 err |= cfc_check_trigger_is_unique(cmd->stop_src);
1529 /* Step 2b : and mutually compatible */
1534 /* step 3: make sure arguments are trivially compatible */
1536 if (cmd->start_src != TRIG_EXT && cmd->start_arg != 0) {
1541 if (cmd->start_src == TRIG_EXT && cmd->start_arg > 39) {
1542 cmd->start_arg = 39;
1546 if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg > 39) {
1547 cmd->scan_begin_arg = 39;
1551 if (cmd->convert_src == TRIG_EXT && cmd->convert_arg > 39) {
1552 cmd->convert_arg = 39;
1555 #define MAX_SPEED 200000 /* in nanoseconds */
1556 #define MIN_SPEED 2000000000 /* in nanoseconds */
1558 if (cmd->scan_begin_src == TRIG_TIMER) {
1559 if (cmd->scan_begin_arg < MAX_SPEED) {
1560 cmd->scan_begin_arg = MAX_SPEED;
1563 if (cmd->scan_begin_arg > MIN_SPEED) {
1564 cmd->scan_begin_arg = MIN_SPEED;
1568 /* external trigger */
1569 /* should be level/edge, hi/lo specification here */
1570 /* should specify multiple external triggers */
1571 /* if(cmd->scan_begin_arg>9){ */
1572 /* cmd->scan_begin_arg=9; */
1576 if (cmd->convert_src == TRIG_TIMER) {
1577 if (cmd->convert_arg < MAX_SPEED) {
1578 cmd->convert_arg = MAX_SPEED;
1581 if (cmd->convert_arg > MIN_SPEED) {
1582 cmd->convert_arg = MIN_SPEED;
1586 /* external trigger */
1588 /* if(cmd->convert_arg>9){ */
1589 /* cmd->convert_arg=9; */
1594 if (cmd->scan_end_arg != cmd->chanlist_len) {
1595 cmd->scan_end_arg = cmd->chanlist_len;
1598 if (cmd->stop_src == TRIG_COUNT) {
1599 if (cmd->stop_arg > 0x00ffffff) {
1600 cmd->stop_arg = 0x00ffffff;
1605 if (cmd->stop_arg != 0) {
1614 /* step 4: fix up any arguments */
1616 if (cmd->scan_begin_src == TRIG_TIMER) {
1617 tmp = cmd->scan_begin_arg;
1618 s626_ns_to_timer((int *)&cmd->scan_begin_arg,
1619 cmd->flags & TRIG_ROUND_MASK);
1620 if (tmp != cmd->scan_begin_arg)
1623 if (cmd->convert_src == TRIG_TIMER) {
1624 tmp = cmd->convert_arg;
1625 s626_ns_to_timer((int *)&cmd->convert_arg,
1626 cmd->flags & TRIG_ROUND_MASK);
1627 if (tmp != cmd->convert_arg)
1629 if (cmd->scan_begin_src == TRIG_TIMER &&
1630 cmd->scan_begin_arg <
1631 cmd->convert_arg * cmd->scan_end_arg) {
1632 cmd->scan_begin_arg =
1633 cmd->convert_arg * cmd->scan_end_arg;
1644 static int s626_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
1646 /* Stop RPS program in case it is currently running. */
1647 MC_DISABLE(P_MC1, MC1_ERPS1);
1649 /* disable master interrupt */
1650 writel(0, devpriv->base_addr + P_IER);
1652 devpriv->ai_cmd_running = 0;
1657 static int s626_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
1658 struct comedi_insn *insn, unsigned int *data)
1662 uint16_t chan = CR_CHAN(insn->chanspec);
1665 for (i = 0; i < insn->n; i++) {
1666 dacdata = (int16_t) data[i];
1667 devpriv->ao_readback[CR_CHAN(insn->chanspec)] = data[i];
1668 dacdata -= (0x1fff);
1670 SetDAC(dev, chan, dacdata);
1676 static int s626_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1677 struct comedi_insn *insn, unsigned int *data)
1681 for (i = 0; i < insn->n; i++)
1682 data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
1687 /* *************** DIGITAL I/O FUNCTIONS ***************
1688 * All DIO functions address a group of DIO channels by means of
1689 * "group" argument. group may be 0, 1 or 2, which correspond to DIO
1690 * ports A, B and C, respectively.
1693 static void s626_dio_init(struct comedi_device *dev)
1696 struct comedi_subdevice *s;
1698 /* Prepare to treat writes to WRCapSel as capture disables. */
1699 DEBIwrite(dev, LP_MISC1, MISC1_NOEDCAP);
1701 /* For each group of sixteen channels ... */
1702 for (group = 0; group < S626_DIO_BANKS; group++) {
1703 s = dev->subdevices + 2 + group;
1704 DEBIwrite(dev, diopriv->WRIntSel, 0); /* Disable all interrupts. */
1705 DEBIwrite(dev, diopriv->WRCapSel, 0xFFFF); /* Disable all event */
1707 DEBIwrite(dev, diopriv->WREdgSel, 0); /* Init all DIOs to */
1710 DEBIwrite(dev, diopriv->WRDOut, 0); /* Program all outputs */
1711 /* to inactive state. */
1715 /* DIO devices are slightly special. Although it is possible to
1716 * implement the insn_read/insn_write interface, it is much more
1717 * useful to applications if you implement the insn_bits interface.
1718 * This allows packed reading/writing of the DIO channels. The comedi
1719 * core can convert between insn_bits and insn_read/write */
1721 static int s626_dio_insn_bits(struct comedi_device *dev,
1722 struct comedi_subdevice *s,
1723 struct comedi_insn *insn, unsigned int *data)
1726 * The insn data consists of a mask in data[0] and the new data in
1727 * data[1]. The mask defines which bits we are concerning about.
1728 * The new data must be anded with the mask. Each channel
1729 * corresponds to a bit.
1732 /* Check if requested ports are configured for output */
1733 if ((s->io_bits & data[0]) != data[0])
1736 s->state &= ~data[0];
1737 s->state |= data[0] & data[1];
1739 /* Write out the new digital output lines */
1741 DEBIwrite(dev, diopriv->WRDOut, s->state);
1743 data[1] = DEBIread(dev, diopriv->RDDIn);
1748 static int s626_dio_insn_config(struct comedi_device *dev,
1749 struct comedi_subdevice *s,
1750 struct comedi_insn *insn, unsigned int *data)
1754 case INSN_CONFIG_DIO_QUERY:
1757 io_bits & (1 << CR_CHAN(insn->chanspec))) ? COMEDI_OUTPUT :
1762 s->io_bits &= ~(1 << CR_CHAN(insn->chanspec));
1765 s->io_bits |= 1 << CR_CHAN(insn->chanspec);
1771 DEBIwrite(dev, diopriv->WRDOut, s->io_bits);
1776 /* Now this function initializes the value of the counter (data[0])
1777 and set the subdevice. To complete with trigger and interrupt
1779 /* FIXME: data[0] is supposed to be an INSN_CONFIG_xxx constant indicating
1780 * what is being configured, but this function appears to be using data[0]
1782 static int s626_enc_insn_config(struct comedi_device *dev,
1783 struct comedi_subdevice *s,
1784 struct comedi_insn *insn, unsigned int *data)
1786 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
1788 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
1789 (CLKSRC_COUNTER << BF_CLKSRC) | /* Operating mode is Counter. */
1790 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
1791 /* ( CNTDIR_UP << BF_CLKPOL ) | // Count direction is Down. */
1792 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
1793 (CLKENAB_INDEX << BF_CLKENAB);
1794 /* uint16_t DisableIntSrc=TRUE; */
1795 /* uint32_t Preloadvalue; //Counter initial value */
1796 uint16_t valueSrclatch = LATCHSRC_AB_READ;
1797 uint16_t enab = CLKENAB_ALWAYS;
1798 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1800 /* (data==NULL) ? (Preloadvalue=0) : (Preloadvalue=data[0]); */
1802 k->SetMode(dev, k, Setup, TRUE);
1803 Preload(dev, k, data[0]);
1804 k->PulseIndex(dev, k);
1805 SetLatchSource(dev, k, valueSrclatch);
1806 k->SetEnable(dev, k, (uint16_t) (enab != 0));
1811 static int s626_enc_insn_read(struct comedi_device *dev,
1812 struct comedi_subdevice *s,
1813 struct comedi_insn *insn, unsigned int *data)
1817 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1819 for (n = 0; n < insn->n; n++)
1820 data[n] = ReadLatch(dev, k);
1825 static int s626_enc_insn_write(struct comedi_device *dev,
1826 struct comedi_subdevice *s,
1827 struct comedi_insn *insn, unsigned int *data)
1830 struct enc_private *k = &encpriv[CR_CHAN(insn->chanspec)];
1832 /* Set the preload register */
1833 Preload(dev, k, data[0]);
1835 /* Software index pulse forces the preload register to load */
1836 /* into the counter */
1837 k->SetLoadTrig(dev, k, 0);
1838 k->PulseIndex(dev, k);
1839 k->SetLoadTrig(dev, k, 2);
1844 static void WriteMISC2(struct comedi_device *dev, uint16_t NewImage)
1846 DEBIwrite(dev, LP_MISC1, MISC1_WENABLE); /* enab writes to */
1847 /* MISC2 register. */
1848 DEBIwrite(dev, LP_WRMISC2, NewImage); /* Write new image to MISC2. */
1849 DEBIwrite(dev, LP_MISC1, MISC1_WDISABLE); /* Disable writes to MISC2. */
1852 static void CloseDMAB(struct comedi_device *dev, struct bufferDMA *pdma,
1855 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1861 /* find the matching allocation from the board struct */
1863 vbptr = pdma->LogicalBase;
1864 vpptr = pdma->PhysicalBase;
1866 pci_free_consistent(pcidev, bsize, vbptr, vpptr);
1867 pdma->LogicalBase = NULL;
1868 pdma->PhysicalBase = 0;
1872 /* ****** PRIVATE COUNTER FUNCTIONS ****** */
1874 /* Reset a counter's index and overflow event capture flags. */
1876 static void ResetCapFlags_A(struct comedi_device *dev, struct enc_private *k)
1878 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
1879 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A);
1882 static void ResetCapFlags_B(struct comedi_device *dev, struct enc_private *k)
1884 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
1885 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B);
1888 /* Return counter setup in a format (COUNTER_SETUP) that is consistent */
1889 /* for both A and B counters. */
1891 static uint16_t GetMode_A(struct comedi_device *dev, struct enc_private *k)
1893 register uint16_t cra;
1894 register uint16_t crb;
1895 register uint16_t setup;
1897 /* Fetch CRA and CRB register images. */
1898 cra = DEBIread(dev, k->MyCRA);
1899 crb = DEBIread(dev, k->MyCRB);
1901 /* Populate the standardized counter setup bit fields. Note: */
1902 /* IndexSrc is restricted to ENC_X or IndxPol. */
1903 setup = ((cra & STDMSK_LOADSRC) /* LoadSrc = LoadSrcA. */
1904 |((crb << (STDBIT_LATCHSRC - CRBBIT_LATCHSRC)) & STDMSK_LATCHSRC) /* LatchSrc = LatchSrcA. */
1905 |((cra << (STDBIT_INTSRC - CRABIT_INTSRC_A)) & STDMSK_INTSRC) /* IntSrc = IntSrcA. */
1906 |((cra << (STDBIT_INDXSRC - (CRABIT_INDXSRC_A + 1))) & STDMSK_INDXSRC) /* IndxSrc = IndxSrcA<1>. */
1907 |((cra >> (CRABIT_INDXPOL_A - STDBIT_INDXPOL)) & STDMSK_INDXPOL) /* IndxPol = IndxPolA. */
1908 |((crb >> (CRBBIT_CLKENAB_A - STDBIT_CLKENAB)) & STDMSK_CLKENAB)); /* ClkEnab = ClkEnabA. */
1910 /* Adjust mode-dependent parameters. */
1911 if (cra & (2 << CRABIT_CLKSRC_A)) /* If Timer mode (ClkSrcA<1> == 1): */
1912 setup |= ((CLKSRC_TIMER << STDBIT_CLKSRC) /* Indicate Timer mode. */
1913 |((cra << (STDBIT_CLKPOL - CRABIT_CLKSRC_A)) & STDMSK_CLKPOL) /* Set ClkPol to indicate count direction (ClkSrcA<0>). */
1914 |(MULT_X1 << STDBIT_CLKMULT)); /* ClkMult must be 1x in Timer mode. */
1916 else /* If Counter mode (ClkSrcA<1> == 0): */
1917 setup |= ((CLKSRC_COUNTER << STDBIT_CLKSRC) /* Indicate Counter mode. */
1918 |((cra >> (CRABIT_CLKPOL_A - STDBIT_CLKPOL)) & STDMSK_CLKPOL) /* Pass through ClkPol. */
1919 |(((cra & CRAMSK_CLKMULT_A) == (MULT_X0 << CRABIT_CLKMULT_A)) ? /* Force ClkMult to 1x if not legal, else pass through. */
1920 (MULT_X1 << STDBIT_CLKMULT) :
1921 ((cra >> (CRABIT_CLKMULT_A -
1922 STDBIT_CLKMULT)) & STDMSK_CLKMULT)));
1924 /* Return adjusted counter setup. */
1928 static uint16_t GetMode_B(struct comedi_device *dev, struct enc_private *k)
1930 register uint16_t cra;
1931 register uint16_t crb;
1932 register uint16_t setup;
1934 /* Fetch CRA and CRB register images. */
1935 cra = DEBIread(dev, k->MyCRA);
1936 crb = DEBIread(dev, k->MyCRB);
1938 /* Populate the standardized counter setup bit fields. Note: */
1939 /* IndexSrc is restricted to ENC_X or IndxPol. */
1940 setup = (((crb << (STDBIT_INTSRC - CRBBIT_INTSRC_B)) & STDMSK_INTSRC) /* IntSrc = IntSrcB. */
1941 |((crb << (STDBIT_LATCHSRC - CRBBIT_LATCHSRC)) & STDMSK_LATCHSRC) /* LatchSrc = LatchSrcB. */
1942 |((crb << (STDBIT_LOADSRC - CRBBIT_LOADSRC_B)) & STDMSK_LOADSRC) /* LoadSrc = LoadSrcB. */
1943 |((crb << (STDBIT_INDXPOL - CRBBIT_INDXPOL_B)) & STDMSK_INDXPOL) /* IndxPol = IndxPolB. */
1944 |((crb >> (CRBBIT_CLKENAB_B - STDBIT_CLKENAB)) & STDMSK_CLKENAB) /* ClkEnab = ClkEnabB. */
1945 |((cra >> ((CRABIT_INDXSRC_B + 1) - STDBIT_INDXSRC)) & STDMSK_INDXSRC)); /* IndxSrc = IndxSrcB<1>. */
1947 /* Adjust mode-dependent parameters. */
1948 if ((crb & CRBMSK_CLKMULT_B) == (MULT_X0 << CRBBIT_CLKMULT_B)) /* If Extender mode (ClkMultB == MULT_X0): */
1949 setup |= ((CLKSRC_EXTENDER << STDBIT_CLKSRC) /* Indicate Extender mode. */
1950 |(MULT_X1 << STDBIT_CLKMULT) /* Indicate multiplier is 1x. */
1951 |((cra >> (CRABIT_CLKSRC_B - STDBIT_CLKPOL)) & STDMSK_CLKPOL)); /* Set ClkPol equal to Timer count direction (ClkSrcB<0>). */
1953 else if (cra & (2 << CRABIT_CLKSRC_B)) /* If Timer mode (ClkSrcB<1> == 1): */
1954 setup |= ((CLKSRC_TIMER << STDBIT_CLKSRC) /* Indicate Timer mode. */
1955 |(MULT_X1 << STDBIT_CLKMULT) /* Indicate multiplier is 1x. */
1956 |((cra >> (CRABIT_CLKSRC_B - STDBIT_CLKPOL)) & STDMSK_CLKPOL)); /* Set ClkPol equal to Timer count direction (ClkSrcB<0>). */
1958 else /* If Counter mode (ClkSrcB<1> == 0): */
1959 setup |= ((CLKSRC_COUNTER << STDBIT_CLKSRC) /* Indicate Timer mode. */
1960 |((crb >> (CRBBIT_CLKMULT_B - STDBIT_CLKMULT)) & STDMSK_CLKMULT) /* Clock multiplier is passed through. */
1961 |((crb << (STDBIT_CLKPOL - CRBBIT_CLKPOL_B)) & STDMSK_CLKPOL)); /* Clock polarity is passed through. */
1963 /* Return adjusted counter setup. */
1968 * Set the operating mode for the specified counter. The setup
1969 * parameter is treated as a COUNTER_SETUP data type. The following
1970 * parameters are programmable (all other parms are ignored): ClkMult,
1971 * ClkPol, ClkEnab, IndexSrc, IndexPol, LoadSrc.
1974 static void SetMode_A(struct comedi_device *dev, struct enc_private *k,
1975 uint16_t Setup, uint16_t DisableIntSrc)
1977 register uint16_t cra;
1978 register uint16_t crb;
1979 register uint16_t setup = Setup; /* Cache the Standard Setup. */
1981 /* Initialize CRA and CRB images. */
1982 cra = ((setup & CRAMSK_LOADSRC_A) /* Preload trigger is passed through. */
1983 |((setup & STDMSK_INDXSRC) >> (STDBIT_INDXSRC - (CRABIT_INDXSRC_A + 1)))); /* IndexSrc is restricted to ENC_X or IndxPol. */
1985 crb = (CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A /* Reset any pending CounterA event captures. */
1986 | ((setup & STDMSK_CLKENAB) << (CRBBIT_CLKENAB_A - STDBIT_CLKENAB))); /* Clock enable is passed through. */
1988 /* Force IntSrc to Disabled if DisableIntSrc is asserted. */
1990 cra |= ((setup & STDMSK_INTSRC) >> (STDBIT_INTSRC -
1993 /* Populate all mode-dependent attributes of CRA & CRB images. */
1994 switch ((setup & STDMSK_CLKSRC) >> STDBIT_CLKSRC) {
1995 case CLKSRC_EXTENDER: /* Extender Mode: Force to Timer mode */
1996 /* (Extender valid only for B counters). */
1998 case CLKSRC_TIMER: /* Timer Mode: */
1999 cra |= ((2 << CRABIT_CLKSRC_A) /* ClkSrcA<1> selects system clock */
2000 |((setup & STDMSK_CLKPOL) >> (STDBIT_CLKPOL - CRABIT_CLKSRC_A)) /* with count direction (ClkSrcA<0>) obtained from ClkPol. */
2001 |(1 << CRABIT_CLKPOL_A) /* ClkPolA behaves as always-on clock enable. */
2002 |(MULT_X1 << CRABIT_CLKMULT_A)); /* ClkMult must be 1x. */
2005 default: /* Counter Mode: */
2006 cra |= (CLKSRC_COUNTER /* Select ENC_C and ENC_D as clock/direction inputs. */
2007 | ((setup & STDMSK_CLKPOL) << (CRABIT_CLKPOL_A - STDBIT_CLKPOL)) /* Clock polarity is passed through. */
2008 |(((setup & STDMSK_CLKMULT) == (MULT_X0 << STDBIT_CLKMULT)) ? /* Force multiplier to x1 if not legal, otherwise pass through. */
2009 (MULT_X1 << CRABIT_CLKMULT_A) :
2010 ((setup & STDMSK_CLKMULT) << (CRABIT_CLKMULT_A -
2014 /* Force positive index polarity if IndxSrc is software-driven only, */
2015 /* otherwise pass it through. */
2016 if (~setup & STDMSK_INDXSRC)
2017 cra |= ((setup & STDMSK_INDXPOL) << (CRABIT_INDXPOL_A -
2020 /* If IntSrc has been forced to Disabled, update the MISC2 interrupt */
2021 /* enable mask to indicate the counter interrupt is disabled. */
2023 devpriv->CounterIntEnabs &= ~k->MyEventBits[3];
2025 /* While retaining CounterB and LatchSrc configurations, program the */
2026 /* new counter operating mode. */
2027 DEBIreplace(dev, k->MyCRA, CRAMSK_INDXSRC_B | CRAMSK_CLKSRC_B, cra);
2028 DEBIreplace(dev, k->MyCRB,
2029 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_A)), crb);
2032 static void SetMode_B(struct comedi_device *dev, struct enc_private *k,
2033 uint16_t Setup, uint16_t DisableIntSrc)
2035 register uint16_t cra;
2036 register uint16_t crb;
2037 register uint16_t setup = Setup; /* Cache the Standard Setup. */
2039 /* Initialize CRA and CRB images. */
2040 cra = ((setup & STDMSK_INDXSRC) << ((CRABIT_INDXSRC_B + 1) - STDBIT_INDXSRC)); /* IndexSrc field is restricted to ENC_X or IndxPol. */
2042 crb = (CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B /* Reset event captures and disable interrupts. */
2043 | ((setup & STDMSK_CLKENAB) << (CRBBIT_CLKENAB_B - STDBIT_CLKENAB)) /* Clock enable is passed through. */
2044 |((setup & STDMSK_LOADSRC) >> (STDBIT_LOADSRC - CRBBIT_LOADSRC_B))); /* Preload trigger source is passed through. */
2046 /* Force IntSrc to Disabled if DisableIntSrc is asserted. */
2048 crb |= ((setup & STDMSK_INTSRC) >> (STDBIT_INTSRC -
2051 /* Populate all mode-dependent attributes of CRA & CRB images. */
2052 switch ((setup & STDMSK_CLKSRC) >> STDBIT_CLKSRC) {
2053 case CLKSRC_TIMER: /* Timer Mode: */
2054 cra |= ((2 << CRABIT_CLKSRC_B) /* ClkSrcB<1> selects system clock */
2055 |((setup & STDMSK_CLKPOL) << (CRABIT_CLKSRC_B - STDBIT_CLKPOL))); /* with direction (ClkSrcB<0>) obtained from ClkPol. */
2056 crb |= ((1 << CRBBIT_CLKPOL_B) /* ClkPolB behaves as always-on clock enable. */
2057 |(MULT_X1 << CRBBIT_CLKMULT_B)); /* ClkMultB must be 1x. */
2060 case CLKSRC_EXTENDER: /* Extender Mode: */
2061 cra |= ((2 << CRABIT_CLKSRC_B) /* ClkSrcB source is OverflowA (same as "timer") */
2062 |((setup & STDMSK_CLKPOL) << (CRABIT_CLKSRC_B - STDBIT_CLKPOL))); /* with direction obtained from ClkPol. */
2063 crb |= ((1 << CRBBIT_CLKPOL_B) /* ClkPolB controls IndexB -- always set to active. */
2064 |(MULT_X0 << CRBBIT_CLKMULT_B)); /* ClkMultB selects OverflowA as the clock source. */
2067 default: /* Counter Mode: */
2068 cra |= (CLKSRC_COUNTER << CRABIT_CLKSRC_B); /* Select ENC_C and ENC_D as clock/direction inputs. */
2069 crb |= (((setup & STDMSK_CLKPOL) >> (STDBIT_CLKPOL - CRBBIT_CLKPOL_B)) /* ClkPol is passed through. */
2070 |(((setup & STDMSK_CLKMULT) == (MULT_X0 << STDBIT_CLKMULT)) ? /* Force ClkMult to x1 if not legal, otherwise pass through. */
2071 (MULT_X1 << CRBBIT_CLKMULT_B) :
2072 ((setup & STDMSK_CLKMULT) << (CRBBIT_CLKMULT_B -
2076 /* Force positive index polarity if IndxSrc is software-driven only, */
2077 /* otherwise pass it through. */
2078 if (~setup & STDMSK_INDXSRC)
2079 crb |= ((setup & STDMSK_INDXPOL) >> (STDBIT_INDXPOL -
2082 /* If IntSrc has been forced to Disabled, update the MISC2 interrupt */
2083 /* enable mask to indicate the counter interrupt is disabled. */
2085 devpriv->CounterIntEnabs &= ~k->MyEventBits[3];
2087 /* While retaining CounterA and LatchSrc configurations, program the */
2088 /* new counter operating mode. */
2089 DEBIreplace(dev, k->MyCRA,
2090 (uint16_t) (~(CRAMSK_INDXSRC_B | CRAMSK_CLKSRC_B)), cra);
2091 DEBIreplace(dev, k->MyCRB, CRBMSK_CLKENAB_A | CRBMSK_LATCHSRC, crb);
2094 /* Return/set a counter's enable. enab: 0=always enabled, 1=enabled by index. */
2096 static void SetEnable_A(struct comedi_device *dev, struct enc_private *k,
2099 DEBIreplace(dev, k->MyCRB,
2100 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_A)),
2101 (uint16_t) (enab << CRBBIT_CLKENAB_A));
2104 static void SetEnable_B(struct comedi_device *dev, struct enc_private *k,
2107 DEBIreplace(dev, k->MyCRB,
2108 (uint16_t) (~(CRBMSK_INTCTRL | CRBMSK_CLKENAB_B)),
2109 (uint16_t) (enab << CRBBIT_CLKENAB_B));
2112 static uint16_t GetEnable_A(struct comedi_device *dev, struct enc_private *k)
2114 return (DEBIread(dev, k->MyCRB) >> CRBBIT_CLKENAB_A) & 1;
2117 static uint16_t GetEnable_B(struct comedi_device *dev, struct enc_private *k)
2119 return (DEBIread(dev, k->MyCRB) >> CRBBIT_CLKENAB_B) & 1;
2123 * static uint16_t GetLatchSource(struct comedi_device *dev, struct enc_private *k )
2125 * return ( DEBIread( dev, k->MyCRB) >> CRBBIT_LATCHSRC ) & 3;
2130 * Return/set the event that will trigger transfer of the preload
2131 * register into the counter. 0=ThisCntr_Index, 1=ThisCntr_Overflow,
2132 * 2=OverflowA (B counters only), 3=disabled.
2135 static void SetLoadTrig_A(struct comedi_device *dev, struct enc_private *k,
2138 DEBIreplace(dev, k->MyCRA, (uint16_t) (~CRAMSK_LOADSRC_A),
2139 (uint16_t) (Trig << CRABIT_LOADSRC_A));
2142 static void SetLoadTrig_B(struct comedi_device *dev, struct enc_private *k,
2145 DEBIreplace(dev, k->MyCRB,
2146 (uint16_t) (~(CRBMSK_LOADSRC_B | CRBMSK_INTCTRL)),
2147 (uint16_t) (Trig << CRBBIT_LOADSRC_B));
2150 static uint16_t GetLoadTrig_A(struct comedi_device *dev, struct enc_private *k)
2152 return (DEBIread(dev, k->MyCRA) >> CRABIT_LOADSRC_A) & 3;
2155 static uint16_t GetLoadTrig_B(struct comedi_device *dev, struct enc_private *k)
2157 return (DEBIread(dev, k->MyCRB) >> CRBBIT_LOADSRC_B) & 3;
2160 /* Return/set counter interrupt source and clear any captured
2161 * index/overflow events. IntSource: 0=Disabled, 1=OverflowOnly,
2162 * 2=IndexOnly, 3=IndexAndOverflow.
2165 static void SetIntSrc_A(struct comedi_device *dev, struct enc_private *k,
2168 /* Reset any pending counter overflow or index captures. */
2169 DEBIreplace(dev, k->MyCRB, (uint16_t) (~CRBMSK_INTCTRL),
2170 CRBMSK_INTRESETCMD | CRBMSK_INTRESET_A);
2172 /* Program counter interrupt source. */
2173 DEBIreplace(dev, k->MyCRA, ~CRAMSK_INTSRC_A,
2174 (uint16_t) (IntSource << CRABIT_INTSRC_A));
2176 /* Update MISC2 interrupt enable mask. */
2177 devpriv->CounterIntEnabs =
2178 (devpriv->CounterIntEnabs & ~k->
2179 MyEventBits[3]) | k->MyEventBits[IntSource];
2182 static void SetIntSrc_B(struct comedi_device *dev, struct enc_private *k,
2187 /* Cache writeable CRB register image. */
2188 crb = DEBIread(dev, k->MyCRB) & ~CRBMSK_INTCTRL;
2190 /* Reset any pending counter overflow or index captures. */
2191 DEBIwrite(dev, k->MyCRB,
2192 (uint16_t) (crb | CRBMSK_INTRESETCMD | CRBMSK_INTRESET_B));
2194 /* Program counter interrupt source. */
2195 DEBIwrite(dev, k->MyCRB,
2196 (uint16_t) ((crb & ~CRBMSK_INTSRC_B) | (IntSource <<
2199 /* Update MISC2 interrupt enable mask. */
2200 devpriv->CounterIntEnabs =
2201 (devpriv->CounterIntEnabs & ~k->
2202 MyEventBits[3]) | k->MyEventBits[IntSource];
2205 static uint16_t GetIntSrc_A(struct comedi_device *dev, struct enc_private *k)
2207 return (DEBIread(dev, k->MyCRA) >> CRABIT_INTSRC_A) & 3;
2210 static uint16_t GetIntSrc_B(struct comedi_device *dev, struct enc_private *k)
2212 return (DEBIread(dev, k->MyCRB) >> CRBBIT_INTSRC_B) & 3;
2215 /* Return/set the clock multiplier. */
2217 /* static void SetClkMult(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2219 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKMULT ) | ( value << STDBIT_CLKMULT ) ), FALSE ); */
2222 /* static uint16_t GetClkMult(struct comedi_device *dev, struct enc_private *k ) */
2224 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKMULT ) & 3; */
2227 /* Return/set the clock polarity. */
2229 /* static void SetClkPol( struct comedi_device *dev,struct enc_private *k, uint16_t value ) */
2231 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKPOL ) | ( value << STDBIT_CLKPOL ) ), FALSE ); */
2234 /* static uint16_t GetClkPol(struct comedi_device *dev, struct enc_private *k ) */
2236 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKPOL ) & 1; */
2239 /* Return/set the clock source. */
2241 /* static void SetClkSrc( struct comedi_device *dev,struct enc_private *k, uint16_t value ) */
2243 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_CLKSRC ) | ( value << STDBIT_CLKSRC ) ), FALSE ); */
2246 /* static uint16_t GetClkSrc( struct comedi_device *dev,struct enc_private *k ) */
2248 /* return ( k->GetMode(dev, k ) >> STDBIT_CLKSRC ) & 3; */
2251 /* Return/set the index polarity. */
2253 /* static void SetIndexPol(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2255 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_INDXPOL ) | ( (value != 0) << STDBIT_INDXPOL ) ), FALSE ); */
2258 /* static uint16_t GetIndexPol(struct comedi_device *dev, struct enc_private *k ) */
2260 /* return ( k->GetMode(dev, k ) >> STDBIT_INDXPOL ) & 1; */
2263 /* Return/set the index source. */
2265 /* static void SetIndexSrc(struct comedi_device *dev, struct enc_private *k, uint16_t value ) */
2267 /* k->SetMode(dev, k, (uint16_t)( ( k->GetMode(dev, k ) & ~STDMSK_INDXSRC ) | ( (value != 0) << STDBIT_INDXSRC ) ), FALSE ); */
2270 /* static uint16_t GetIndexSrc(struct comedi_device *dev, struct enc_private *k ) */
2272 /* return ( k->GetMode(dev, k ) >> STDBIT_INDXSRC ) & 1; */
2275 /* Generate an index pulse. */
2277 static void PulseIndex_A(struct comedi_device *dev, struct enc_private *k)
2279 register uint16_t cra;
2281 cra = DEBIread(dev, k->MyCRA); /* Pulse index. */
2282 DEBIwrite(dev, k->MyCRA, (uint16_t) (cra ^ CRAMSK_INDXPOL_A));
2283 DEBIwrite(dev, k->MyCRA, cra);
2286 static void PulseIndex_B(struct comedi_device *dev, struct enc_private *k)
2288 register uint16_t crb;
2290 crb = DEBIread(dev, k->MyCRB) & ~CRBMSK_INTCTRL; /* Pulse index. */
2291 DEBIwrite(dev, k->MyCRB, (uint16_t) (crb ^ CRBMSK_INDXPOL_B));
2292 DEBIwrite(dev, k->MyCRB, crb);
2295 static struct enc_private enc_private_data[] = {
2297 .GetEnable = GetEnable_A,
2298 .GetIntSrc = GetIntSrc_A,
2299 .GetLoadTrig = GetLoadTrig_A,
2300 .GetMode = GetMode_A,
2301 .PulseIndex = PulseIndex_A,
2302 .SetEnable = SetEnable_A,
2303 .SetIntSrc = SetIntSrc_A,
2304 .SetLoadTrig = SetLoadTrig_A,
2305 .SetMode = SetMode_A,
2306 .ResetCapFlags = ResetCapFlags_A,
2309 .MyLatchLsw = LP_CNTR0ALSW,
2310 .MyEventBits = EVBITS(0),
2312 .GetEnable = GetEnable_A,
2313 .GetIntSrc = GetIntSrc_A,
2314 .GetLoadTrig = GetLoadTrig_A,
2315 .GetMode = GetMode_A,
2316 .PulseIndex = PulseIndex_A,
2317 .SetEnable = SetEnable_A,
2318 .SetIntSrc = SetIntSrc_A,
2319 .SetLoadTrig = SetLoadTrig_A,
2320 .SetMode = SetMode_A,
2321 .ResetCapFlags = ResetCapFlags_A,
2324 .MyLatchLsw = LP_CNTR1ALSW,
2325 .MyEventBits = EVBITS(1),
2327 .GetEnable = GetEnable_A,
2328 .GetIntSrc = GetIntSrc_A,
2329 .GetLoadTrig = GetLoadTrig_A,
2330 .GetMode = GetMode_A,
2331 .PulseIndex = PulseIndex_A,
2332 .SetEnable = SetEnable_A,
2333 .SetIntSrc = SetIntSrc_A,
2334 .SetLoadTrig = SetLoadTrig_A,
2335 .SetMode = SetMode_A,
2336 .ResetCapFlags = ResetCapFlags_A,
2339 .MyLatchLsw = LP_CNTR2ALSW,
2340 .MyEventBits = EVBITS(2),
2342 .GetEnable = GetEnable_B,
2343 .GetIntSrc = GetIntSrc_B,
2344 .GetLoadTrig = GetLoadTrig_B,
2345 .GetMode = GetMode_B,
2346 .PulseIndex = PulseIndex_B,
2347 .SetEnable = SetEnable_B,
2348 .SetIntSrc = SetIntSrc_B,
2349 .SetLoadTrig = SetLoadTrig_B,
2350 .SetMode = SetMode_B,
2351 .ResetCapFlags = ResetCapFlags_B,
2354 .MyLatchLsw = LP_CNTR0BLSW,
2355 .MyEventBits = EVBITS(3),
2357 .GetEnable = GetEnable_B,
2358 .GetIntSrc = GetIntSrc_B,
2359 .GetLoadTrig = GetLoadTrig_B,
2360 .GetMode = GetMode_B,
2361 .PulseIndex = PulseIndex_B,
2362 .SetEnable = SetEnable_B,
2363 .SetIntSrc = SetIntSrc_B,
2364 .SetLoadTrig = SetLoadTrig_B,
2365 .SetMode = SetMode_B,
2366 .ResetCapFlags = ResetCapFlags_B,
2369 .MyLatchLsw = LP_CNTR1BLSW,
2370 .MyEventBits = EVBITS(4),
2372 .GetEnable = GetEnable_B,
2373 .GetIntSrc = GetIntSrc_B,
2374 .GetLoadTrig = GetLoadTrig_B,
2375 .GetMode = GetMode_B,
2376 .PulseIndex = PulseIndex_B,
2377 .SetEnable = SetEnable_B,
2378 .SetIntSrc = SetIntSrc_B,
2379 .SetLoadTrig = SetLoadTrig_B,
2380 .SetMode = SetMode_B,
2381 .ResetCapFlags = ResetCapFlags_B,
2384 .MyLatchLsw = LP_CNTR2BLSW,
2385 .MyEventBits = EVBITS(5),
2389 static void CountersInit(struct comedi_device *dev)
2392 struct enc_private *k;
2393 uint16_t Setup = (LOADSRC_INDX << BF_LOADSRC) | /* Preload upon */
2395 (INDXSRC_SOFT << BF_INDXSRC) | /* Disable hardware index. */
2396 (CLKSRC_COUNTER << BF_CLKSRC) | /* Operating mode is counter. */
2397 (CLKPOL_POS << BF_CLKPOL) | /* Active high clock. */
2398 (CNTDIR_UP << BF_CLKPOL) | /* Count direction is up. */
2399 (CLKMULT_1X << BF_CLKMULT) | /* Clock multiplier is 1x. */
2400 (CLKENAB_INDEX << BF_CLKENAB); /* Enabled by index */
2402 /* Disable all counter interrupts and clear any captured counter events. */
2403 for (chan = 0; chan < S626_ENCODER_CHANNELS; chan++) {
2405 k->SetMode(dev, k, Setup, TRUE);
2406 k->SetIntSrc(dev, k, 0);
2407 k->ResetCapFlags(dev, k);
2408 k->SetEnable(dev, k, CLKENAB_ALWAYS);
2412 static int s626_allocate_dma_buffers(struct comedi_device *dev)
2414 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
2418 addr = pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma);
2421 devpriv->ANABuf.LogicalBase = addr;
2422 devpriv->ANABuf.PhysicalBase = appdma;
2424 addr = pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma);
2427 devpriv->RPSBuf.LogicalBase = addr;
2428 devpriv->RPSBuf.PhysicalBase = appdma;
2433 static void s626_initialize(struct comedi_device *dev)
2435 dma_addr_t pPhysBuf;
2439 /* Enable DEBI and audio pins, enable I2C interface */
2440 MC_ENABLE(P_MC1, MC1_DEBI | MC1_AUDIO | MC1_I2C);
2443 * Configure DEBI operating mode
2445 * Local bus is 16 bits wide
2446 * Declare DEBI transfer timeout interval
2447 * Set up byte lane steering
2448 * Intel-compatible local bus (DEBI never times out)
2450 WR7146(P_DEBICFG, DEBI_CFG_SLAVE16 |
2451 (DEBI_TOUT << DEBI_CFG_TOUT_BIT) |
2452 DEBI_SWAP | DEBI_CFG_INTEL);
2454 /* Disable MMU paging */
2455 WR7146(P_DEBIPAGE, DEBI_PAGE_DISABLE);
2457 /* Init GPIO so that ADC Start* is negated */
2458 WR7146(P_GPIO, GPIO_BASE | GPIO1_HI);
2460 /* I2C device address for onboard eeprom (revb) */
2461 devpriv->I2CAdrs = 0xA0;
2464 * Issue an I2C ABORT command to halt any I2C
2465 * operation in progress and reset BUSY flag.
2467 WR7146(P_I2CSTAT, I2C_CLKSEL | I2C_ABORT);
2468 MC_ENABLE(P_MC2, MC2_UPLD_IIC);
2469 while ((RR7146(P_MC2) & MC2_UPLD_IIC) == 0)
2473 * Per SAA7146 data sheet, write to STATUS
2474 * reg twice to reset all I2C error flags.
2476 for (i = 0; i < 2; i++) {
2477 WR7146(P_I2CSTAT, I2C_CLKSEL);
2478 MC_ENABLE(P_MC2, MC2_UPLD_IIC);
2479 while (!MC_TEST(P_MC2, MC2_UPLD_IIC))
2484 * Init audio interface functional attributes: set DAC/ADC
2485 * serial clock rates, invert DAC serial clock so that
2486 * DAC data setup times are satisfied, enable DAC serial
2489 WR7146(P_ACON2, ACON2_INIT);
2492 * Set up TSL1 slot list, which is used to control the
2493 * accumulation of ADC data: RSD1 = shift data in on SD1.
2494 * SIB_A1 = store data uint8_t at next available location
2495 * in FB BUFFER1 register.
2497 WR7146(P_TSL1, RSD1 | SIB_A1);
2498 WR7146(P_TSL1 + 4, RSD1 | SIB_A1 | EOS);
2500 /* Enable TSL1 slot list so that it executes all the time */
2501 WR7146(P_ACON1, ACON1_ADCSTART);
2504 * Initialize RPS registers used for ADC
2507 /* Physical start of RPS program */
2508 WR7146(P_RPSADDR1, (uint32_t)devpriv->RPSBuf.PhysicalBase);
2509 /* RPS program performs no explicit mem writes */
2510 WR7146(P_RPSPAGE1, 0);
2511 /* Disable RPS timeouts */
2512 WR7146(P_RPS1_TOUT, 0);
2516 * SAA7146 BUG WORKAROUND
2518 * Initialize SAA7146 ADC interface to a known state by
2519 * invoking ADCs until FB BUFFER 1 register shows that it
2520 * is correctly receiving ADC data. This is necessary
2521 * because the SAA7146 ADC interface does not start up in
2522 * a defined state after a PCI reset.
2530 unsigned int data[16];
2532 /* Create a simple polling list for analog input channel 0 */
2534 ResetADC(dev, &PollList);
2536 /* Get initial ADC value */
2537 s626_ai_rinsn(dev, dev->subdevices, NULL, data);
2541 * VERSION 2.01 CHANGE: TIMEOUT ADDED TO PREVENT HANGED EXECUTION.
2543 * Invoke ADCs until the new ADC value differs from the initial
2544 * value or a timeout occurs. The timeout protects against the
2545 * possibility that the driver is restarting and the ADC data is a
2546 * fixed value resulting from the applied ADC analog input being
2547 * unusually quiet or at the rail.
2549 for (index = 0; index < 500; index++) {
2550 s626_ai_rinsn(dev, dev->subdevices, NULL, data);
2552 if (AdcData != StartVal)
2557 #endif /* SAA7146 BUG WORKAROUND */
2560 * Initialize the DAC interface
2564 * Init Audio2's output DMAC attributes:
2565 * burst length = 1 DWORD
2566 * threshold = 1 DWORD.
2568 WR7146(P_PCI_BT_A, 0);
2571 * Init Audio2's output DMA physical addresses. The protection
2572 * address is set to 1 DWORD past the base address so that a
2573 * single DWORD will be transferred each time a DMA transfer is
2576 pPhysBuf = devpriv->ANABuf.PhysicalBase +
2577 (DAC_WDMABUF_OS * sizeof(uint32_t));
2578 WR7146(P_BASEA2_OUT, (uint32_t) pPhysBuf);
2579 WR7146(P_PROTA2_OUT, (uint32_t) (pPhysBuf + sizeof(uint32_t)));
2582 * Cache Audio2's output DMA buffer logical address. This is
2583 * where DAC data is buffered for A2 output DMA transfers.
2585 devpriv->pDacWBuf = (uint32_t *)devpriv->ANABuf.LogicalBase +
2589 * Audio2's output channels does not use paging. The
2590 * protection violation handling bit is set so that the
2591 * DMAC will automatically halt and its PCI address pointer
2592 * will be reset when the protection address is reached.
2594 WR7146(P_PAGEA2_OUT, 8);
2597 * Initialize time slot list 2 (TSL2), which is used to control
2598 * the clock generation for and serialization of data to be sent
2599 * to the DAC devices. Slot 0 is a NOP that is used to trap TSL
2600 * execution; this permits other slots to be safely modified
2601 * without first turning off the TSL sequencer (which is
2602 * apparently impossible to do). Also, SD3 (which is driven by a
2603 * pull-up resistor) is shifted in and stored to the MSB of
2604 * FB_BUFFER2 to be used as evidence that the slot sequence has
2605 * not yet finished executing.
2608 /* Slot 0: Trap TSL execution, shift 0xFF into FB_BUFFER2 */
2609 SETVECT(0, XSD2 | RSD3 | SIB_A2 | EOS);
2612 * Initialize slot 1, which is constant. Slot 1 causes a
2613 * DWORD to be transferred from audio channel 2's output FIFO
2614 * to the FIFO's output buffer so that it can be serialized
2615 * and sent to the DAC during subsequent slots. All remaining
2616 * slots are dynamically populated as required by the target
2620 /* Slot 1: Fetch DWORD from Audio2's output FIFO */
2623 /* Start DAC's audio interface (TSL2) running */
2624 WR7146(P_ACON1, ACON1_DACSTART);
2627 * Init Trim DACs to calibrated values. Do it twice because the
2628 * SAA7146 audio channel does not always reset properly and
2629 * sometimes causes the first few TrimDAC writes to malfunction.
2635 * Manually init all gate array hardware in case this is a soft
2636 * reset (we have no way of determining whether this is a warm
2637 * or cold start). This is necessary because the gate array will
2638 * reset only in response to a PCI hard reset; there is no soft
2643 * Init all DAC outputs to 0V and init all DAC setpoint and
2646 for (chan = 0; chan < S626_DAC_CHANNELS; chan++)
2647 SetDAC(dev, chan, 0);
2653 * Without modifying the state of the Battery Backup enab, disable
2654 * the watchdog timer, set DIO channels 0-5 to operate in the
2655 * standard DIO (vs. counter overflow) mode, disable the battery
2656 * charger, and reset the watchdog interval selector to zero.
2658 WriteMISC2(dev, (uint16_t)(DEBIread(dev, LP_RDMISC2) &
2659 MISC2_BATT_ENABLE));
2661 /* Initialize the digital I/O subsystem */
2664 /* enable interrupt test */
2665 /* writel(IRQ_GPIO3 | IRQ_RPS1, devpriv->base_addr + P_IER); */
2668 static int s626_attach_pci(struct comedi_device *dev, struct pci_dev *pcidev)
2670 struct comedi_subdevice *s;
2673 comedi_set_hw_dev(dev, &pcidev->dev);
2674 dev->board_name = dev->driver->driver_name;
2676 if (alloc_private(dev, sizeof(struct s626_private)) < 0)
2679 ret = comedi_pci_enable(pcidev, dev->board_name);
2682 dev->iobase = 1; /* detach needs this */
2684 devpriv->base_addr = ioremap(pci_resource_start(pcidev, 0),
2685 pci_resource_len(pcidev, 0));
2686 if (!devpriv->base_addr)
2689 /* disable master interrupt */
2690 writel(0, devpriv->base_addr + P_IER);
2693 writel(MC1_SOFT_RESET, devpriv->base_addr + P_MC1);
2695 /* DMA FIXME DMA// */
2697 ret = s626_allocate_dma_buffers(dev);
2702 ret = request_irq(pcidev->irq, s626_irq_handler, IRQF_SHARED,
2703 dev->board_name, dev);
2706 dev->irq = pcidev->irq;
2709 ret = comedi_alloc_subdevices(dev, 6);
2713 s = dev->subdevices + 0;
2714 /* analog input subdevice */
2715 dev->read_subdev = s;
2716 /* we support single-ended (ground) and differential */
2717 s->type = COMEDI_SUBD_AI;
2718 s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_CMD_READ;
2719 s->n_chan = S626_ADC_CHANNELS;
2720 s->maxdata = (0xffff >> 2);
2721 s->range_table = &s626_range_table;
2722 s->len_chanlist = S626_ADC_CHANNELS;
2723 s->insn_config = s626_ai_insn_config;
2724 s->insn_read = s626_ai_insn_read;
2725 s->do_cmd = s626_ai_cmd;
2726 s->do_cmdtest = s626_ai_cmdtest;
2727 s->cancel = s626_ai_cancel;
2729 s = dev->subdevices + 1;
2730 /* analog output subdevice */
2731 s->type = COMEDI_SUBD_AO;
2732 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2733 s->n_chan = S626_DAC_CHANNELS;
2734 s->maxdata = (0x3fff);
2735 s->range_table = &range_bipolar10;
2736 s->insn_write = s626_ao_winsn;
2737 s->insn_read = s626_ao_rinsn;
2739 s = dev->subdevices + 2;
2740 /* digital I/O subdevice */
2741 s->type = COMEDI_SUBD_DIO;
2742 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2745 s->io_bits = 0xffff;
2746 s->private = &dio_private_A;
2747 s->range_table = &range_digital;
2748 s->insn_config = s626_dio_insn_config;
2749 s->insn_bits = s626_dio_insn_bits;
2751 s = dev->subdevices + 3;
2752 /* digital I/O subdevice */
2753 s->type = COMEDI_SUBD_DIO;
2754 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2757 s->io_bits = 0xffff;
2758 s->private = &dio_private_B;
2759 s->range_table = &range_digital;
2760 s->insn_config = s626_dio_insn_config;
2761 s->insn_bits = s626_dio_insn_bits;
2763 s = dev->subdevices + 4;
2764 /* digital I/O subdevice */
2765 s->type = COMEDI_SUBD_DIO;
2766 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2769 s->io_bits = 0xffff;
2770 s->private = &dio_private_C;
2771 s->range_table = &range_digital;
2772 s->insn_config = s626_dio_insn_config;
2773 s->insn_bits = s626_dio_insn_bits;
2775 s = dev->subdevices + 5;
2776 /* encoder (counter) subdevice */
2777 s->type = COMEDI_SUBD_COUNTER;
2778 s->subdev_flags = SDF_WRITABLE | SDF_READABLE | SDF_LSAMPL;
2779 s->n_chan = S626_ENCODER_CHANNELS;
2780 s->private = enc_private_data;
2781 s->insn_config = s626_enc_insn_config;
2782 s->insn_read = s626_enc_insn_read;
2783 s->insn_write = s626_enc_insn_write;
2784 s->maxdata = 0xffffff;
2785 s->range_table = &range_unknown;
2787 s626_initialize(dev);
2789 dev_info(dev->class_dev, "%s attached\n", dev->board_name);
2794 static void s626_detach(struct comedi_device *dev)
2796 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
2799 /* stop ai_command */
2800 devpriv->ai_cmd_running = 0;
2802 if (devpriv->base_addr) {
2803 /* interrupt mask */
2804 WR7146(P_IER, 0); /* Disable master interrupt. */
2805 WR7146(P_ISR, IRQ_GPIO3 | IRQ_RPS1); /* Clear board's IRQ status flag. */
2807 /* Disable the watchdog timer and battery charger. */
2810 /* Close all interfaces on 7146 device. */
2811 WR7146(P_MC1, MC1_SHUTDOWN);
2812 WR7146(P_ACON1, ACON1_BASE);
2814 CloseDMAB(dev, &devpriv->RPSBuf, DMABUF_SIZE);
2815 CloseDMAB(dev, &devpriv->ANABuf, DMABUF_SIZE);
2819 free_irq(dev->irq, dev);
2820 if (devpriv->base_addr)
2821 iounmap(devpriv->base_addr);
2825 comedi_pci_disable(pcidev);
2829 static struct comedi_driver s626_driver = {
2830 .driver_name = "s626",
2831 .module = THIS_MODULE,
2832 .attach_pci = s626_attach_pci,
2833 .detach = s626_detach,
2836 static int __devinit s626_pci_probe(struct pci_dev *dev,
2837 const struct pci_device_id *ent)
2839 return comedi_pci_auto_config(dev, &s626_driver);
2842 static void __devexit s626_pci_remove(struct pci_dev *dev)
2844 comedi_pci_auto_unconfig(dev);
2848 * For devices with vendor:device id == 0x1131:0x7146 you must specify
2849 * also subvendor:subdevice ids, because otherwise it will conflict with
2850 * Philips SAA7146 media/dvb based cards.
2852 static DEFINE_PCI_DEVICE_TABLE(s626_pci_table) = {
2853 { PCI_VENDOR_ID_S626, PCI_DEVICE_ID_S626,
2854 PCI_SUBVENDOR_ID_S626, PCI_SUBDEVICE_ID_S626, 0, 0, 0 },
2857 MODULE_DEVICE_TABLE(pci, s626_pci_table);
2859 static struct pci_driver s626_pci_driver = {
2861 .id_table = s626_pci_table,
2862 .probe = s626_pci_probe,
2863 .remove = __devexit_p(s626_pci_remove),
2865 module_comedi_pci_driver(s626_driver, s626_pci_driver);
2867 MODULE_AUTHOR("Gianluca Palli <gpalli@deis.unibo.it>");
2868 MODULE_DESCRIPTION("Sensoray 626 Comedi driver module");
2869 MODULE_LICENSE("GPL");