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Linux/drivers/staging/comedi/drivers/amplc_pci224.c

  1 /*
  2  * comedi/drivers/amplc_pci224.c
  3  * Driver for Amplicon PCI224 and PCI234 AO boards.
  4  *
  5  * Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
  6  *
  7  * COMEDI - Linux Control and Measurement Device Interface
  8  * Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License as published by
 12  * the Free Software Foundation; either version 2 of the License, or
 13  * (at your option) any later version.
 14  *
 15  * This program is distributed in the hope that it will be useful,
 16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  * GNU General Public License for more details.
 19  */
 20 
 21 /*
 22  * Driver: amplc_pci224
 23  * Description: Amplicon PCI224, PCI234
 24  * Author: Ian Abbott <abbotti@mev.co.uk>
 25  * Devices: [Amplicon] PCI224 (amplc_pci224), PCI234
 26  * Updated: Thu, 31 Jul 2014 11:08:03 +0000
 27  * Status: works, but see caveats
 28  *
 29  * Supports:
 30  *
 31  *   - ao_insn read/write
 32  *   - ao_do_cmd mode with the following sources:
 33  *
 34  *     - start_src         TRIG_INT        TRIG_EXT
 35  *     - scan_begin_src    TRIG_TIMER      TRIG_EXT
 36  *     - convert_src       TRIG_NOW
 37  *     - scan_end_src      TRIG_COUNT
 38  *     - stop_src          TRIG_COUNT      TRIG_EXT        TRIG_NONE
 39  *
 40  *     The channel list must contain at least one channel with no repeated
 41  *     channels.  The scan end count must equal the number of channels in
 42  *     the channel list.
 43  *
 44  *     There is only one external trigger source so only one of start_src,
 45  *     scan_begin_src or stop_src may use TRIG_EXT.
 46  *
 47  * Configuration options:
 48  *   none
 49  *
 50  * Manual configuration of PCI cards is not supported; they are configured
 51  * automatically.
 52  *
 53  * Output range selection - PCI224:
 54  *
 55  *   Output ranges on PCI224 are partly software-selectable and partly
 56  *   hardware-selectable according to jumper LK1.  All channels are set
 57  *   to the same range:
 58  *
 59  *   - LK1 position 1-2 (factory default) corresponds to the following
 60  *     comedi ranges:
 61  *
 62  *       0: [-10V,+10V]; 1: [-5V,+5V]; 2: [-2.5V,+2.5V], 3: [-1.25V,+1.25V],
 63  *       4: [0,+10V],    5: [0,+5V],   6: [0,+2.5V],     7: [0,+1.25V]
 64  *
 65  *   - LK1 position 2-3 corresponds to the following Comedi ranges, using
 66  *     an external voltage reference:
 67  *
 68  *       0: [-Vext,+Vext],
 69  *       1: [0,+Vext]
 70  *
 71  * Output range selection - PCI234:
 72  *
 73  *   Output ranges on PCI234 are hardware-selectable according to jumper
 74  *   LK1 which affects all channels, and jumpers LK2, LK3, LK4 and LK5
 75  *   which affect channels 0, 1, 2 and 3 individually.  LK1 chooses between
 76  *   an internal 5V reference and an external voltage reference (Vext).
 77  *   LK2/3/4/5 choose (per channel) to double the reference or not according
 78  *   to the following table:
 79  *
 80  *     LK1 position   LK2/3/4/5 pos  Comedi range
 81  *     -------------  -------------  --------------
 82  *     2-3 (factory)  1-2 (factory)  0: [-10V,+10V]
 83  *     2-3 (factory)  2-3            1: [-5V,+5V]
 84  *     1-2            1-2 (factory)  2: [-2*Vext,+2*Vext]
 85  *     1-2            2-3            3: [-Vext,+Vext]
 86  *
 87  * Caveats:
 88  *
 89  *   1) All channels on the PCI224 share the same range.  Any change to the
 90  *      range as a result of insn_write or a streaming command will affect
 91  *      the output voltages of all channels, including those not specified
 92  *      by the instruction or command.
 93  *
 94  *   2) For the analog output command,  the first scan may be triggered
 95  *      falsely at the start of acquisition.  This occurs when the DAC scan
 96  *      trigger source is switched from 'none' to 'timer' (scan_begin_src =
 97  *      TRIG_TIMER) or 'external' (scan_begin_src == TRIG_EXT) at the start
 98  *      of acquisition and the trigger source is at logic level 1 at the
 99  *      time of the switch.  This is very likely for TRIG_TIMER.  For
100  *      TRIG_EXT, it depends on the state of the external line and whether
101  *      the CR_INVERT flag has been set.  The remaining scans are triggered
102  *      correctly.
103  */
104 
105 #include <linux/module.h>
106 #include <linux/interrupt.h>
107 #include <linux/slab.h>
108 
109 #include "../comedi_pci.h"
110 
111 #include "comedi_8254.h"
112 
113 /*
114  * PCI224/234 i/o space 1 (PCIBAR2) registers.
115  */
116 #define PCI224_Z2_BASE  0x14    /* 82C54 counter/timer */
117 #define PCI224_ZCLK_SCE 0x1A    /* Group Z Clock Configuration Register */
118 #define PCI224_ZGAT_SCE 0x1D    /* Group Z Gate Configuration Register */
119 #define PCI224_INT_SCE  0x1E    /* ISR Interrupt source mask register */
120                                 /* /Interrupt status */
121 
122 /*
123  * PCI224/234 i/o space 2 (PCIBAR3) 16-bit registers.
124  */
125 #define PCI224_DACDATA  0x00    /* (w-o) DAC FIFO data. */
126 #define PCI224_SOFTTRIG 0x00    /* (r-o) DAC software scan trigger. */
127 #define PCI224_DACCON   0x02    /* (r/w) DAC status/configuration. */
128 #define PCI224_FIFOSIZ  0x04    /* (w-o) FIFO size for wraparound mode. */
129 #define PCI224_DACCEN   0x06    /* (w-o) DAC channel enable register. */
130 
131 /*
132  * DACCON values.
133  */
134 /* (r/w) Scan trigger. */
135 #define PCI224_DACCON_TRIG(x)           (((x) & 0x7) << 0)
136 #define PCI224_DACCON_TRIG_MASK         PCI224_DACCON_TRIG(7)
137 #define PCI224_DACCON_TRIG_NONE         PCI224_DACCON_TRIG(0)   /* none */
138 #define PCI224_DACCON_TRIG_SW           PCI224_DACCON_TRIG(1)   /* soft trig */
139 #define PCI224_DACCON_TRIG_EXTP         PCI224_DACCON_TRIG(2)   /* ext + edge */
140 #define PCI224_DACCON_TRIG_EXTN         PCI224_DACCON_TRIG(3)   /* ext - edge */
141 #define PCI224_DACCON_TRIG_Z2CT0        PCI224_DACCON_TRIG(4)   /* Z2 CT0 out */
142 #define PCI224_DACCON_TRIG_Z2CT1        PCI224_DACCON_TRIG(5)   /* Z2 CT1 out */
143 #define PCI224_DACCON_TRIG_Z2CT2        PCI224_DACCON_TRIG(6)   /* Z2 CT2 out */
144 /* (r/w) Polarity (PCI224 only, PCI234 always bipolar!). */
145 #define PCI224_DACCON_POLAR(x)          (((x) & 0x1) << 3)
146 #define PCI224_DACCON_POLAR_MASK        PCI224_DACCON_POLAR(1)
147 #define PCI224_DACCON_POLAR_UNI         PCI224_DACCON_POLAR(0)  /* [0,+V] */
148 #define PCI224_DACCON_POLAR_BI          PCI224_DACCON_POLAR(1)  /* [-V,+V] */
149 /* (r/w) Internal Vref (PCI224 only, when LK1 in position 1-2). */
150 #define PCI224_DACCON_VREF(x)           (((x) & 0x3) << 4)
151 #define PCI224_DACCON_VREF_MASK         PCI224_DACCON_VREF(3)
152 #define PCI224_DACCON_VREF_1_25         PCI224_DACCON_VREF(0)   /* 1.25V */
153 #define PCI224_DACCON_VREF_2_5          PCI224_DACCON_VREF(1)   /* 2.5V */
154 #define PCI224_DACCON_VREF_5            PCI224_DACCON_VREF(2)   /* 5V */
155 #define PCI224_DACCON_VREF_10           PCI224_DACCON_VREF(3)   /* 10V */
156 /* (r/w) Wraparound mode enable (to play back stored waveform). */
157 #define PCI224_DACCON_FIFOWRAP          BIT(7)
158 /* (r/w) FIFO enable.  It MUST be set! */
159 #define PCI224_DACCON_FIFOENAB          BIT(8)
160 /* (r/w) FIFO interrupt trigger level (most values are not very useful). */
161 #define PCI224_DACCON_FIFOINTR(x)       (((x) & 0x7) << 9)
162 #define PCI224_DACCON_FIFOINTR_MASK     PCI224_DACCON_FIFOINTR(7)
163 #define PCI224_DACCON_FIFOINTR_EMPTY    PCI224_DACCON_FIFOINTR(0) /* empty */
164 #define PCI224_DACCON_FIFOINTR_NEMPTY   PCI224_DACCON_FIFOINTR(1) /* !empty */
165 #define PCI224_DACCON_FIFOINTR_NHALF    PCI224_DACCON_FIFOINTR(2) /* !half */
166 #define PCI224_DACCON_FIFOINTR_HALF     PCI224_DACCON_FIFOINTR(3) /* half */
167 #define PCI224_DACCON_FIFOINTR_NFULL    PCI224_DACCON_FIFOINTR(4) /* !full */
168 #define PCI224_DACCON_FIFOINTR_FULL     PCI224_DACCON_FIFOINTR(5) /* full */
169 /* (r-o) FIFO fill level. */
170 #define PCI224_DACCON_FIFOFL(x)         (((x) & 0x7) << 12)
171 #define PCI224_DACCON_FIFOFL_MASK       PCI224_DACCON_FIFOFL(7)
172 #define PCI224_DACCON_FIFOFL_EMPTY      PCI224_DACCON_FIFOFL(1) /* 0 */
173 #define PCI224_DACCON_FIFOFL_ONETOHALF  PCI224_DACCON_FIFOFL(0) /* 1-2048 */
174 #define PCI224_DACCON_FIFOFL_HALFTOFULL PCI224_DACCON_FIFOFL(4) /* 2049-4095 */
175 #define PCI224_DACCON_FIFOFL_FULL       PCI224_DACCON_FIFOFL(6) /* 4096 */
176 /* (r-o) DAC busy flag. */
177 #define PCI224_DACCON_BUSY              BIT(15)
178 /* (w-o) FIFO reset. */
179 #define PCI224_DACCON_FIFORESET         BIT(12)
180 /* (w-o) Global reset (not sure what it does). */
181 #define PCI224_DACCON_GLOBALRESET       BIT(13)
182 
183 /*
184  * DAC FIFO size.
185  */
186 #define PCI224_FIFO_SIZE        4096
187 
188 /*
189  * DAC FIFO guaranteed minimum room available, depending on reported fill level.
190  * The maximum room available depends on the reported fill level and how much
191  * has been written!
192  */
193 #define PCI224_FIFO_ROOM_EMPTY          PCI224_FIFO_SIZE
194 #define PCI224_FIFO_ROOM_ONETOHALF      (PCI224_FIFO_SIZE / 2)
195 #define PCI224_FIFO_ROOM_HALFTOFULL     1
196 #define PCI224_FIFO_ROOM_FULL           0
197 
198 /*
199  * Counter/timer clock input configuration sources.
200  */
201 #define CLK_CLK         0       /* reserved (channel-specific clock) */
202 #define CLK_10MHZ       1       /* internal 10 MHz clock */
203 #define CLK_1MHZ        2       /* internal 1 MHz clock */
204 #define CLK_100KHZ      3       /* internal 100 kHz clock */
205 #define CLK_10KHZ       4       /* internal 10 kHz clock */
206 #define CLK_1KHZ        5       /* internal 1 kHz clock */
207 #define CLK_OUTNM1      6       /* output of channel-1 modulo total */
208 #define CLK_EXT         7       /* external clock */
209 /* Macro to construct clock input configuration register value. */
210 #define CLK_CONFIG(chan, src)   ((((chan) & 3) << 3) | ((src) & 7))
211 
212 /*
213  * Counter/timer gate input configuration sources.
214  */
215 #define GAT_VCC         0       /* VCC (i.e. enabled) */
216 #define GAT_GND         1       /* GND (i.e. disabled) */
217 #define GAT_EXT         2       /* reserved (external gate input) */
218 #define GAT_NOUTNM2     3       /* inverted output of channel-2 modulo total */
219 /* Macro to construct gate input configuration register value. */
220 #define GAT_CONFIG(chan, src)   ((((chan) & 3) << 3) | ((src) & 7))
221 
222 /*
223  * Summary of CLK_OUTNM1 and GAT_NOUTNM2 connections for PCI224 and PCI234:
224  *
225  *              Channel's       Channel's
226  *              clock input     gate input
227  * Channel      CLK_OUTNM1      GAT_NOUTNM2
228  * -------      ----------      -----------
229  * Z2-CT0       Z2-CT2-OUT      /Z2-CT1-OUT
230  * Z2-CT1       Z2-CT0-OUT      /Z2-CT2-OUT
231  * Z2-CT2       Z2-CT1-OUT      /Z2-CT0-OUT
232  */
233 
234 /*
235  * Interrupt enable/status bits
236  */
237 #define PCI224_INTR_EXT         0x01    /* rising edge on external input */
238 #define PCI224_INTR_DAC         0x04    /* DAC (FIFO) interrupt */
239 #define PCI224_INTR_Z2CT1       0x20    /* rising edge on Z2-CT1 output */
240 
241 #define PCI224_INTR_EDGE_BITS   (PCI224_INTR_EXT | PCI224_INTR_Z2CT1)
242 #define PCI224_INTR_LEVEL_BITS  PCI224_INTR_DACFIFO
243 
244 /*
245  * Handy macros.
246  */
247 
248 /* Combine old and new bits. */
249 #define COMBINE(old, new, mask) (((old) & ~(mask)) | ((new) & (mask)))
250 
251 /* Current CPU.  XXX should this be hard_smp_processor_id()? */
252 #define THISCPU         smp_processor_id()
253 
254 /* State bits for use with atomic bit operations. */
255 #define AO_CMD_STARTED  0
256 
257 /*
258  * Range tables.
259  */
260 
261 /*
262  * The ranges for PCI224.
263  *
264  * These are partly hardware-selectable by jumper LK1 and partly
265  * software-selectable.
266  *
267  * All channels share the same hardware range.
268  */
269 static const struct comedi_lrange range_pci224 = {
270         10, {
271                 /* jumper LK1 in position 1-2 (factory default) */
272                 BIP_RANGE(10),
273                 BIP_RANGE(5),
274                 BIP_RANGE(2.5),
275                 BIP_RANGE(1.25),
276                 UNI_RANGE(10),
277                 UNI_RANGE(5),
278                 UNI_RANGE(2.5),
279                 UNI_RANGE(1.25),
280                 /* jumper LK1 in position 2-3 */
281                 RANGE_ext(-1, 1),       /* bipolar [-Vext,+Vext] */
282                 RANGE_ext(0, 1),        /* unipolar [0,+Vext] */
283         }
284 };
285 
286 static const unsigned short hwrange_pci224[10] = {
287         /* jumper LK1 in position 1-2 (factory default) */
288         PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_10,
289         PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_5,
290         PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_2_5,
291         PCI224_DACCON_POLAR_BI | PCI224_DACCON_VREF_1_25,
292         PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_10,
293         PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_5,
294         PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_2_5,
295         PCI224_DACCON_POLAR_UNI | PCI224_DACCON_VREF_1_25,
296         /* jumper LK1 in position 2-3 */
297         PCI224_DACCON_POLAR_BI,
298         PCI224_DACCON_POLAR_UNI,
299 };
300 
301 /* Used to check all channels set to the same range on PCI224. */
302 static const unsigned char range_check_pci224[10] = {
303         0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
304 };
305 
306 /*
307  * The ranges for PCI234.
308  *
309  * These are all hardware-selectable by jumper LK1 affecting all channels,
310  * and jumpers LK2, LK3, LK4 and LK5 affecting channels 0, 1, 2 and 3
311  * individually.
312  */
313 static const struct comedi_lrange range_pci234 = {
314         4, {
315                 /* LK1: 1-2 (fact def), LK2/3/4/5: 2-3 (fac def) */
316                 BIP_RANGE(10),
317                 /* LK1: 1-2 (fact def), LK2/3/4/5: 1-2 */
318                 BIP_RANGE(5),
319                 /* LK1: 2-3, LK2/3/4/5: 2-3 (fac def) */
320                 RANGE_ext(-2, 2),       /* bipolar [-2*Vext,+2*Vext] */
321                 /* LK1: 2-3, LK2/3/4/5: 1-2 */
322                 RANGE_ext(-1, 1),       /* bipolar [-Vext,+Vext] */
323         }
324 };
325 
326 /* N.B. PCI234 ignores the polarity bit, but software uses it. */
327 static const unsigned short hwrange_pci234[4] = {
328         PCI224_DACCON_POLAR_BI,
329         PCI224_DACCON_POLAR_BI,
330         PCI224_DACCON_POLAR_BI,
331         PCI224_DACCON_POLAR_BI,
332 };
333 
334 /* Used to check all channels use same LK1 setting on PCI234. */
335 static const unsigned char range_check_pci234[4] = {
336         0, 0, 1, 1,
337 };
338 
339 /*
340  * Board descriptions.
341  */
342 
343 enum pci224_model { pci224_model, pci234_model };
344 
345 struct pci224_board {
346         const char *name;
347         unsigned int ao_chans;
348         unsigned int ao_bits;
349         const struct comedi_lrange *ao_range;
350         const unsigned short *ao_hwrange;
351         const unsigned char *ao_range_check;
352 };
353 
354 static const struct pci224_board pci224_boards[] = {
355         [pci224_model] = {
356                 .name           = "pci224",
357                 .ao_chans       = 16,
358                 .ao_bits        = 12,
359                 .ao_range       = &range_pci224,
360                 .ao_hwrange     = &hwrange_pci224[0],
361                 .ao_range_check = &range_check_pci224[0],
362         },
363         [pci234_model] = {
364                 .name           = "pci234",
365                 .ao_chans       = 4,
366                 .ao_bits        = 16,
367                 .ao_range       = &range_pci234,
368                 .ao_hwrange     = &hwrange_pci234[0],
369                 .ao_range_check = &range_check_pci234[0],
370         },
371 };
372 
373 struct pci224_private {
374         unsigned long iobase1;
375         unsigned long state;
376         spinlock_t ao_spinlock; /* spinlock for AO command handling */
377         unsigned short *ao_scan_vals;
378         unsigned char *ao_scan_order;
379         int intr_cpuid;
380         short intr_running;
381         unsigned short daccon;
382         unsigned short ao_enab; /* max 16 channels so 'short' will do */
383         unsigned char intsce;
384 };
385 
386 /*
387  * Called from the 'insn_write' function to perform a single write.
388  */
389 static void
390 pci224_ao_set_data(struct comedi_device *dev, int chan, int range,
391                    unsigned int data)
392 {
393         const struct pci224_board *board = dev->board_ptr;
394         struct pci224_private *devpriv = dev->private;
395         unsigned short mangled;
396 
397         /* Enable the channel. */
398         outw(1 << chan, dev->iobase + PCI224_DACCEN);
399         /* Set range and reset FIFO. */
400         devpriv->daccon = COMBINE(devpriv->daccon, board->ao_hwrange[range],
401                                   PCI224_DACCON_POLAR_MASK |
402                                   PCI224_DACCON_VREF_MASK);
403         outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
404              dev->iobase + PCI224_DACCON);
405         /*
406          * Mangle the data.  The hardware expects:
407          * - bipolar: 16-bit 2's complement
408          * - unipolar: 16-bit unsigned
409          */
410         mangled = (unsigned short)data << (16 - board->ao_bits);
411         if ((devpriv->daccon & PCI224_DACCON_POLAR_MASK) ==
412             PCI224_DACCON_POLAR_BI) {
413                 mangled ^= 0x8000;
414         }
415         /* Write mangled data to the FIFO. */
416         outw(mangled, dev->iobase + PCI224_DACDATA);
417         /* Trigger the conversion. */
418         inw(dev->iobase + PCI224_SOFTTRIG);
419 }
420 
421 static int pci224_ao_insn_write(struct comedi_device *dev,
422                                 struct comedi_subdevice *s,
423                                 struct comedi_insn *insn,
424                                 unsigned int *data)
425 {
426         unsigned int chan = CR_CHAN(insn->chanspec);
427         unsigned int range = CR_RANGE(insn->chanspec);
428         unsigned int val = s->readback[chan];
429         int i;
430 
431         for (i = 0; i < insn->n; i++) {
432                 val = data[i];
433                 pci224_ao_set_data(dev, chan, range, val);
434         }
435         s->readback[chan] = val;
436 
437         return insn->n;
438 }
439 
440 /*
441  * Kills a command running on the AO subdevice.
442  */
443 static void pci224_ao_stop(struct comedi_device *dev,
444                            struct comedi_subdevice *s)
445 {
446         struct pci224_private *devpriv = dev->private;
447         unsigned long flags;
448 
449         if (!test_and_clear_bit(AO_CMD_STARTED, &devpriv->state))
450                 return;
451 
452         spin_lock_irqsave(&devpriv->ao_spinlock, flags);
453         /* Kill the interrupts. */
454         devpriv->intsce = 0;
455         outb(0, devpriv->iobase1 + PCI224_INT_SCE);
456         /*
457          * Interrupt routine may or may not be running.  We may or may not
458          * have been called from the interrupt routine (directly or
459          * indirectly via a comedi_events() callback routine).  It's highly
460          * unlikely that we've been called from some other interrupt routine
461          * but who knows what strange things coders get up to!
462          *
463          * If the interrupt routine is currently running, wait for it to
464          * finish, unless we appear to have been called via the interrupt
465          * routine.
466          */
467         while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) {
468                 spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
469                 spin_lock_irqsave(&devpriv->ao_spinlock, flags);
470         }
471         spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
472         /* Reconfigure DAC for insn_write usage. */
473         outw(0, dev->iobase + PCI224_DACCEN);   /* Disable channels. */
474         devpriv->daccon =
475              COMBINE(devpriv->daccon,
476                      PCI224_DACCON_TRIG_SW | PCI224_DACCON_FIFOINTR_EMPTY,
477                      PCI224_DACCON_TRIG_MASK | PCI224_DACCON_FIFOINTR_MASK);
478         outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
479              dev->iobase + PCI224_DACCON);
480 }
481 
482 /*
483  * Handles start of acquisition for the AO subdevice.
484  */
485 static void pci224_ao_start(struct comedi_device *dev,
486                             struct comedi_subdevice *s)
487 {
488         struct pci224_private *devpriv = dev->private;
489         struct comedi_cmd *cmd = &s->async->cmd;
490         unsigned long flags;
491 
492         set_bit(AO_CMD_STARTED, &devpriv->state);
493 
494         /* Enable interrupts. */
495         spin_lock_irqsave(&devpriv->ao_spinlock, flags);
496         if (cmd->stop_src == TRIG_EXT)
497                 devpriv->intsce = PCI224_INTR_EXT | PCI224_INTR_DAC;
498         else
499                 devpriv->intsce = PCI224_INTR_DAC;
500 
501         outb(devpriv->intsce, devpriv->iobase1 + PCI224_INT_SCE);
502         spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
503 }
504 
505 /*
506  * Handles interrupts from the DAC FIFO.
507  */
508 static void pci224_ao_handle_fifo(struct comedi_device *dev,
509                                   struct comedi_subdevice *s)
510 {
511         struct pci224_private *devpriv = dev->private;
512         struct comedi_cmd *cmd = &s->async->cmd;
513         unsigned int num_scans = comedi_nscans_left(s, 0);
514         unsigned int room;
515         unsigned short dacstat;
516         unsigned int i, n;
517 
518         /* Determine how much room is in the FIFO (in samples). */
519         dacstat = inw(dev->iobase + PCI224_DACCON);
520         switch (dacstat & PCI224_DACCON_FIFOFL_MASK) {
521         case PCI224_DACCON_FIFOFL_EMPTY:
522                 room = PCI224_FIFO_ROOM_EMPTY;
523                 if (cmd->stop_src == TRIG_COUNT &&
524                     s->async->scans_done >= cmd->stop_arg) {
525                         /* FIFO empty at end of counted acquisition. */
526                         s->async->events |= COMEDI_CB_EOA;
527                         comedi_handle_events(dev, s);
528                         return;
529                 }
530                 break;
531         case PCI224_DACCON_FIFOFL_ONETOHALF:
532                 room = PCI224_FIFO_ROOM_ONETOHALF;
533                 break;
534         case PCI224_DACCON_FIFOFL_HALFTOFULL:
535                 room = PCI224_FIFO_ROOM_HALFTOFULL;
536                 break;
537         default:
538                 room = PCI224_FIFO_ROOM_FULL;
539                 break;
540         }
541         if (room >= PCI224_FIFO_ROOM_ONETOHALF) {
542                 /* FIFO is less than half-full. */
543                 if (num_scans == 0) {
544                         /* Nothing left to put in the FIFO. */
545                         dev_err(dev->class_dev, "AO buffer underrun\n");
546                         s->async->events |= COMEDI_CB_OVERFLOW;
547                 }
548         }
549         /* Determine how many new scans can be put in the FIFO. */
550         room /= cmd->chanlist_len;
551 
552         /* Determine how many scans to process. */
553         if (num_scans > room)
554                 num_scans = room;
555 
556         /* Process scans. */
557         for (n = 0; n < num_scans; n++) {
558                 comedi_buf_read_samples(s, &devpriv->ao_scan_vals[0],
559                                         cmd->chanlist_len);
560                 for (i = 0; i < cmd->chanlist_len; i++) {
561                         outw(devpriv->ao_scan_vals[devpriv->ao_scan_order[i]],
562                              dev->iobase + PCI224_DACDATA);
563                 }
564         }
565         if (cmd->stop_src == TRIG_COUNT &&
566             s->async->scans_done >= cmd->stop_arg) {
567                 /*
568                  * Change FIFO interrupt trigger level to wait
569                  * until FIFO is empty.
570                  */
571                 devpriv->daccon = COMBINE(devpriv->daccon,
572                                           PCI224_DACCON_FIFOINTR_EMPTY,
573                                           PCI224_DACCON_FIFOINTR_MASK);
574                 outw(devpriv->daccon, dev->iobase + PCI224_DACCON);
575         }
576         if ((devpriv->daccon & PCI224_DACCON_TRIG_MASK) ==
577             PCI224_DACCON_TRIG_NONE) {
578                 unsigned short trig;
579 
580                 /*
581                  * This is the initial DAC FIFO interrupt at the
582                  * start of the acquisition.  The DAC's scan trigger
583                  * has been set to 'none' up until now.
584                  *
585                  * Now that data has been written to the FIFO, the
586                  * DAC's scan trigger source can be set to the
587                  * correct value.
588                  *
589                  * BUG: The first scan will be triggered immediately
590                  * if the scan trigger source is at logic level 1.
591                  */
592                 if (cmd->scan_begin_src == TRIG_TIMER) {
593                         trig = PCI224_DACCON_TRIG_Z2CT0;
594                 } else {
595                         /* cmd->scan_begin_src == TRIG_EXT */
596                         if (cmd->scan_begin_arg & CR_INVERT)
597                                 trig = PCI224_DACCON_TRIG_EXTN;
598                         else
599                                 trig = PCI224_DACCON_TRIG_EXTP;
600                 }
601                 devpriv->daccon =
602                     COMBINE(devpriv->daccon, trig, PCI224_DACCON_TRIG_MASK);
603                 outw(devpriv->daccon, dev->iobase + PCI224_DACCON);
604         }
605 
606         comedi_handle_events(dev, s);
607 }
608 
609 static int pci224_ao_inttrig_start(struct comedi_device *dev,
610                                    struct comedi_subdevice *s,
611                                    unsigned int trig_num)
612 {
613         struct comedi_cmd *cmd = &s->async->cmd;
614 
615         if (trig_num != cmd->start_arg)
616                 return -EINVAL;
617 
618         s->async->inttrig = NULL;
619         pci224_ao_start(dev, s);
620 
621         return 1;
622 }
623 
624 static int pci224_ao_check_chanlist(struct comedi_device *dev,
625                                     struct comedi_subdevice *s,
626                                     struct comedi_cmd *cmd)
627 {
628         const struct pci224_board *board = dev->board_ptr;
629         unsigned int range_check_0;
630         unsigned int chan_mask = 0;
631         int i;
632 
633         range_check_0 = board->ao_range_check[CR_RANGE(cmd->chanlist[0])];
634         for (i = 0; i < cmd->chanlist_len; i++) {
635                 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
636 
637                 if (chan_mask & (1 << chan)) {
638                         dev_dbg(dev->class_dev,
639                                 "%s: entries in chanlist must contain no duplicate channels\n",
640                                 __func__);
641                         return -EINVAL;
642                 }
643                 chan_mask |= 1 << chan;
644 
645                 if (board->ao_range_check[CR_RANGE(cmd->chanlist[i])] !=
646                     range_check_0) {
647                         dev_dbg(dev->class_dev,
648                                 "%s: entries in chanlist have incompatible ranges\n",
649                                 __func__);
650                         return -EINVAL;
651                 }
652         }
653 
654         return 0;
655 }
656 
657 #define MAX_SCAN_PERIOD         0xFFFFFFFFU
658 #define MIN_SCAN_PERIOD         2500
659 #define CONVERT_PERIOD          625
660 
661 /*
662  * 'do_cmdtest' function for AO subdevice.
663  */
664 static int
665 pci224_ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
666                   struct comedi_cmd *cmd)
667 {
668         int err = 0;
669         unsigned int arg;
670 
671         /* Step 1 : check if triggers are trivially valid */
672 
673         err |= comedi_check_trigger_src(&cmd->start_src, TRIG_INT | TRIG_EXT);
674         err |= comedi_check_trigger_src(&cmd->scan_begin_src,
675                                         TRIG_EXT | TRIG_TIMER);
676         err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
677         err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
678         err |= comedi_check_trigger_src(&cmd->stop_src,
679                                         TRIG_COUNT | TRIG_EXT | TRIG_NONE);
680 
681         if (err)
682                 return 1;
683 
684         /* Step 2a : make sure trigger sources are unique */
685 
686         err |= comedi_check_trigger_is_unique(cmd->start_src);
687         err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
688         err |= comedi_check_trigger_is_unique(cmd->stop_src);
689 
690         /* Step 2b : and mutually compatible */
691 
692         /*
693          * There's only one external trigger signal (which makes these
694          * tests easier).  Only one thing can use it.
695          */
696         arg = 0;
697         if (cmd->start_src & TRIG_EXT)
698                 arg++;
699         if (cmd->scan_begin_src & TRIG_EXT)
700                 arg++;
701         if (cmd->stop_src & TRIG_EXT)
702                 arg++;
703         if (arg > 1)
704                 err |= -EINVAL;
705 
706         if (err)
707                 return 2;
708 
709         /* Step 3: check if arguments are trivially valid */
710 
711         switch (cmd->start_src) {
712         case TRIG_INT:
713                 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
714                 break;
715         case TRIG_EXT:
716                 /* Force to external trigger 0. */
717                 if (cmd->start_arg & ~CR_FLAGS_MASK) {
718                         cmd->start_arg =
719                             COMBINE(cmd->start_arg, 0, ~CR_FLAGS_MASK);
720                         err |= -EINVAL;
721                 }
722                 /* The only flag allowed is CR_EDGE, which is ignored. */
723                 if (cmd->start_arg & CR_FLAGS_MASK & ~CR_EDGE) {
724                         cmd->start_arg = COMBINE(cmd->start_arg, 0,
725                                                  CR_FLAGS_MASK & ~CR_EDGE);
726                         err |= -EINVAL;
727                 }
728                 break;
729         }
730 
731         switch (cmd->scan_begin_src) {
732         case TRIG_TIMER:
733                 err |= comedi_check_trigger_arg_max(&cmd->scan_begin_arg,
734                                                     MAX_SCAN_PERIOD);
735 
736                 arg = cmd->chanlist_len * CONVERT_PERIOD;
737                 if (arg < MIN_SCAN_PERIOD)
738                         arg = MIN_SCAN_PERIOD;
739                 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, arg);
740                 break;
741         case TRIG_EXT:
742                 /* Force to external trigger 0. */
743                 if (cmd->scan_begin_arg & ~CR_FLAGS_MASK) {
744                         cmd->scan_begin_arg =
745                             COMBINE(cmd->scan_begin_arg, 0, ~CR_FLAGS_MASK);
746                         err |= -EINVAL;
747                 }
748                 /* Only allow flags CR_EDGE and CR_INVERT.  Ignore CR_EDGE. */
749                 if (cmd->scan_begin_arg & CR_FLAGS_MASK &
750                     ~(CR_EDGE | CR_INVERT)) {
751                         cmd->scan_begin_arg =
752                             COMBINE(cmd->scan_begin_arg, 0,
753                                     CR_FLAGS_MASK & ~(CR_EDGE | CR_INVERT));
754                         err |= -EINVAL;
755                 }
756                 break;
757         }
758 
759         err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
760         err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
761                                            cmd->chanlist_len);
762 
763         switch (cmd->stop_src) {
764         case TRIG_COUNT:
765                 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
766                 break;
767         case TRIG_EXT:
768                 /* Force to external trigger 0. */
769                 if (cmd->stop_arg & ~CR_FLAGS_MASK) {
770                         cmd->stop_arg =
771                             COMBINE(cmd->stop_arg, 0, ~CR_FLAGS_MASK);
772                         err |= -EINVAL;
773                 }
774                 /* The only flag allowed is CR_EDGE, which is ignored. */
775                 if (cmd->stop_arg & CR_FLAGS_MASK & ~CR_EDGE) {
776                         cmd->stop_arg =
777                             COMBINE(cmd->stop_arg, 0, CR_FLAGS_MASK & ~CR_EDGE);
778                 }
779                 break;
780         case TRIG_NONE:
781                 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
782                 break;
783         }
784 
785         if (err)
786                 return 3;
787 
788         /* Step 4: fix up any arguments. */
789 
790         if (cmd->scan_begin_src == TRIG_TIMER) {
791                 arg = cmd->scan_begin_arg;
792                 /* Use two timers. */
793                 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
794                 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
795         }
796 
797         if (err)
798                 return 4;
799 
800         /* Step 5: check channel list if it exists */
801         if (cmd->chanlist && cmd->chanlist_len > 0)
802                 err |= pci224_ao_check_chanlist(dev, s, cmd);
803 
804         if (err)
805                 return 5;
806 
807         return 0;
808 }
809 
810 static void pci224_ao_start_pacer(struct comedi_device *dev,
811                                   struct comedi_subdevice *s)
812 {
813         struct pci224_private *devpriv = dev->private;
814 
815         /*
816          * The output of timer Z2-0 will be used as the scan trigger
817          * source.
818          */
819         /* Make sure Z2-0 is gated on.  */
820         outb(GAT_CONFIG(0, GAT_VCC), devpriv->iobase1 + PCI224_ZGAT_SCE);
821         /* Cascading with Z2-2. */
822         /* Make sure Z2-2 is gated on.  */
823         outb(GAT_CONFIG(2, GAT_VCC), devpriv->iobase1 + PCI224_ZGAT_SCE);
824         /* Z2-2 needs 10 MHz clock. */
825         outb(CLK_CONFIG(2, CLK_10MHZ), devpriv->iobase1 + PCI224_ZCLK_SCE);
826         /* Z2-0 is clocked from Z2-2's output. */
827         outb(CLK_CONFIG(0, CLK_OUTNM1), devpriv->iobase1 + PCI224_ZCLK_SCE);
828 
829         comedi_8254_pacer_enable(dev->pacer, 2, 0, false);
830 }
831 
832 static int pci224_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
833 {
834         const struct pci224_board *board = dev->board_ptr;
835         struct pci224_private *devpriv = dev->private;
836         struct comedi_cmd *cmd = &s->async->cmd;
837         int range;
838         unsigned int i, j;
839         unsigned int ch;
840         unsigned int rank;
841         unsigned long flags;
842 
843         /* Cannot handle null/empty chanlist. */
844         if (!cmd->chanlist || cmd->chanlist_len == 0)
845                 return -EINVAL;
846 
847         /* Determine which channels are enabled and their load order.  */
848         devpriv->ao_enab = 0;
849 
850         for (i = 0; i < cmd->chanlist_len; i++) {
851                 ch = CR_CHAN(cmd->chanlist[i]);
852                 devpriv->ao_enab |= 1U << ch;
853                 rank = 0;
854                 for (j = 0; j < cmd->chanlist_len; j++) {
855                         if (CR_CHAN(cmd->chanlist[j]) < ch)
856                                 rank++;
857                 }
858                 devpriv->ao_scan_order[rank] = i;
859         }
860 
861         /* Set enabled channels. */
862         outw(devpriv->ao_enab, dev->iobase + PCI224_DACCEN);
863 
864         /* Determine range and polarity.  All channels the same.  */
865         range = CR_RANGE(cmd->chanlist[0]);
866 
867         /*
868          * Set DAC range and polarity.
869          * Set DAC scan trigger source to 'none'.
870          * Set DAC FIFO interrupt trigger level to 'not half full'.
871          * Reset DAC FIFO.
872          *
873          * N.B. DAC FIFO interrupts are currently disabled.
874          */
875         devpriv->daccon =
876             COMBINE(devpriv->daccon,
877                     board->ao_hwrange[range] | PCI224_DACCON_TRIG_NONE |
878                     PCI224_DACCON_FIFOINTR_NHALF,
879                     PCI224_DACCON_POLAR_MASK | PCI224_DACCON_VREF_MASK |
880                     PCI224_DACCON_TRIG_MASK | PCI224_DACCON_FIFOINTR_MASK);
881         outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
882              dev->iobase + PCI224_DACCON);
883 
884         if (cmd->scan_begin_src == TRIG_TIMER) {
885                 comedi_8254_update_divisors(dev->pacer);
886                 pci224_ao_start_pacer(dev, s);
887         }
888 
889         spin_lock_irqsave(&devpriv->ao_spinlock, flags);
890         if (cmd->start_src == TRIG_INT) {
891                 s->async->inttrig = pci224_ao_inttrig_start;
892         } else {        /* TRIG_EXT */
893                 /* Enable external interrupt trigger to start acquisition. */
894                 devpriv->intsce |= PCI224_INTR_EXT;
895                 outb(devpriv->intsce, devpriv->iobase1 + PCI224_INT_SCE);
896         }
897         spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
898 
899         return 0;
900 }
901 
902 /*
903  * 'cancel' function for AO subdevice.
904  */
905 static int pci224_ao_cancel(struct comedi_device *dev,
906                             struct comedi_subdevice *s)
907 {
908         pci224_ao_stop(dev, s);
909         return 0;
910 }
911 
912 /*
913  * 'munge' data for AO command.
914  */
915 static void
916 pci224_ao_munge(struct comedi_device *dev, struct comedi_subdevice *s,
917                 void *data, unsigned int num_bytes, unsigned int chan_index)
918 {
919         const struct pci224_board *board = dev->board_ptr;
920         struct comedi_cmd *cmd = &s->async->cmd;
921         unsigned short *array = data;
922         unsigned int length = num_bytes / sizeof(*array);
923         unsigned int offset;
924         unsigned int shift;
925         unsigned int i;
926 
927         /* The hardware expects 16-bit numbers. */
928         shift = 16 - board->ao_bits;
929         /* Channels will be all bipolar or all unipolar. */
930         if ((board->ao_hwrange[CR_RANGE(cmd->chanlist[0])] &
931              PCI224_DACCON_POLAR_MASK) == PCI224_DACCON_POLAR_UNI) {
932                 /* Unipolar */
933                 offset = 0;
934         } else {
935                 /* Bipolar */
936                 offset = 32768;
937         }
938         /* Munge the data. */
939         for (i = 0; i < length; i++)
940                 array[i] = (array[i] << shift) - offset;
941 }
942 
943 /*
944  * Interrupt handler.
945  */
946 static irqreturn_t pci224_interrupt(int irq, void *d)
947 {
948         struct comedi_device *dev = d;
949         struct pci224_private *devpriv = dev->private;
950         struct comedi_subdevice *s = dev->write_subdev;
951         struct comedi_cmd *cmd;
952         unsigned char intstat, valid_intstat;
953         unsigned char curenab;
954         int retval = 0;
955         unsigned long flags;
956 
957         intstat = inb(devpriv->iobase1 + PCI224_INT_SCE) & 0x3F;
958         if (intstat) {
959                 retval = 1;
960                 spin_lock_irqsave(&devpriv->ao_spinlock, flags);
961                 valid_intstat = devpriv->intsce & intstat;
962                 /* Temporarily disable interrupt sources. */
963                 curenab = devpriv->intsce & ~intstat;
964                 outb(curenab, devpriv->iobase1 + PCI224_INT_SCE);
965                 devpriv->intr_running = 1;
966                 devpriv->intr_cpuid = THISCPU;
967                 spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
968                 if (valid_intstat) {
969                         cmd = &s->async->cmd;
970                         if (valid_intstat & PCI224_INTR_EXT) {
971                                 devpriv->intsce &= ~PCI224_INTR_EXT;
972                                 if (cmd->start_src == TRIG_EXT)
973                                         pci224_ao_start(dev, s);
974                                 else if (cmd->stop_src == TRIG_EXT)
975                                         pci224_ao_stop(dev, s);
976                         }
977                         if (valid_intstat & PCI224_INTR_DAC)
978                                 pci224_ao_handle_fifo(dev, s);
979                 }
980                 /* Reenable interrupt sources. */
981                 spin_lock_irqsave(&devpriv->ao_spinlock, flags);
982                 if (curenab != devpriv->intsce) {
983                         outb(devpriv->intsce,
984                              devpriv->iobase1 + PCI224_INT_SCE);
985                 }
986                 devpriv->intr_running = 0;
987                 spin_unlock_irqrestore(&devpriv->ao_spinlock, flags);
988         }
989         return IRQ_RETVAL(retval);
990 }
991 
992 static int
993 pci224_auto_attach(struct comedi_device *dev, unsigned long context_model)
994 {
995         struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
996         const struct pci224_board *board = NULL;
997         struct pci224_private *devpriv;
998         struct comedi_subdevice *s;
999         unsigned int irq;
1000         int ret;
1001 
1002         if (context_model < ARRAY_SIZE(pci224_boards))
1003                 board = &pci224_boards[context_model];
1004         if (!board || !board->name) {
1005                 dev_err(dev->class_dev,
1006                         "amplc_pci224: BUG! cannot determine board type!\n");
1007                 return -EINVAL;
1008         }
1009         dev->board_ptr = board;
1010         dev->board_name = board->name;
1011 
1012         dev_info(dev->class_dev, "amplc_pci224: attach pci %s - %s\n",
1013                  pci_name(pci_dev), dev->board_name);
1014 
1015         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1016         if (!devpriv)
1017                 return -ENOMEM;
1018 
1019         ret = comedi_pci_enable(dev);
1020         if (ret)
1021                 return ret;
1022 
1023         spin_lock_init(&devpriv->ao_spinlock);
1024 
1025         devpriv->iobase1 = pci_resource_start(pci_dev, 2);
1026         dev->iobase = pci_resource_start(pci_dev, 3);
1027         irq = pci_dev->irq;
1028 
1029         /* Allocate buffer to hold values for AO channel scan. */
1030         devpriv->ao_scan_vals = kmalloc_array(board->ao_chans,
1031                                               sizeof(devpriv->ao_scan_vals[0]),
1032                                               GFP_KERNEL);
1033         if (!devpriv->ao_scan_vals)
1034                 return -ENOMEM;
1035 
1036         /* Allocate buffer to hold AO channel scan order. */
1037         devpriv->ao_scan_order =
1038                                 kmalloc_array(board->ao_chans,
1039                                               sizeof(devpriv->ao_scan_order[0]),
1040                                               GFP_KERNEL);
1041         if (!devpriv->ao_scan_order)
1042                 return -ENOMEM;
1043 
1044         /* Disable interrupt sources. */
1045         devpriv->intsce = 0;
1046         outb(0, devpriv->iobase1 + PCI224_INT_SCE);
1047 
1048         /* Initialize the DAC hardware. */
1049         outw(PCI224_DACCON_GLOBALRESET, dev->iobase + PCI224_DACCON);
1050         outw(0, dev->iobase + PCI224_DACCEN);
1051         outw(0, dev->iobase + PCI224_FIFOSIZ);
1052         devpriv->daccon = PCI224_DACCON_TRIG_SW | PCI224_DACCON_POLAR_BI |
1053                           PCI224_DACCON_FIFOENAB | PCI224_DACCON_FIFOINTR_EMPTY;
1054         outw(devpriv->daccon | PCI224_DACCON_FIFORESET,
1055              dev->iobase + PCI224_DACCON);
1056 
1057         dev->pacer = comedi_8254_init(devpriv->iobase1 + PCI224_Z2_BASE,
1058                                       I8254_OSC_BASE_10MHZ, I8254_IO8, 0);
1059         if (!dev->pacer)
1060                 return -ENOMEM;
1061 
1062         ret = comedi_alloc_subdevices(dev, 1);
1063         if (ret)
1064                 return ret;
1065 
1066         s = &dev->subdevices[0];
1067         /* Analog output subdevice. */
1068         s->type = COMEDI_SUBD_AO;
1069         s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1070         s->n_chan = board->ao_chans;
1071         s->maxdata = (1 << board->ao_bits) - 1;
1072         s->range_table = board->ao_range;
1073         s->insn_write = pci224_ao_insn_write;
1074         s->len_chanlist = s->n_chan;
1075         dev->write_subdev = s;
1076         s->do_cmd = pci224_ao_cmd;
1077         s->do_cmdtest = pci224_ao_cmdtest;
1078         s->cancel = pci224_ao_cancel;
1079         s->munge = pci224_ao_munge;
1080 
1081         ret = comedi_alloc_subdev_readback(s);
1082         if (ret)
1083                 return ret;
1084 
1085         if (irq) {
1086                 ret = request_irq(irq, pci224_interrupt, IRQF_SHARED,
1087                                   dev->board_name, dev);
1088                 if (ret < 0) {
1089                         dev_err(dev->class_dev,
1090                                 "error! unable to allocate irq %u\n", irq);
1091                         return ret;
1092                 }
1093                 dev->irq = irq;
1094         }
1095 
1096         return 0;
1097 }
1098 
1099 static void pci224_detach(struct comedi_device *dev)
1100 {
1101         struct pci224_private *devpriv = dev->private;
1102 
1103         comedi_pci_detach(dev);
1104         if (devpriv) {
1105                 kfree(devpriv->ao_scan_vals);
1106                 kfree(devpriv->ao_scan_order);
1107         }
1108 }
1109 
1110 static struct comedi_driver amplc_pci224_driver = {
1111         .driver_name    = "amplc_pci224",
1112         .module         = THIS_MODULE,
1113         .detach         = pci224_detach,
1114         .auto_attach    = pci224_auto_attach,
1115         .board_name     = &pci224_boards[0].name,
1116         .offset         = sizeof(struct pci224_board),
1117         .num_names      = ARRAY_SIZE(pci224_boards),
1118 };
1119 
1120 static int amplc_pci224_pci_probe(struct pci_dev *dev,
1121                                   const struct pci_device_id *id)
1122 {
1123         return comedi_pci_auto_config(dev, &amplc_pci224_driver,
1124                                       id->driver_data);
1125 }
1126 
1127 static const struct pci_device_id amplc_pci224_pci_table[] = {
1128         { PCI_VDEVICE(AMPLICON, 0x0007), pci224_model },
1129         { PCI_VDEVICE(AMPLICON, 0x0008), pci234_model },
1130         { 0 }
1131 };
1132 MODULE_DEVICE_TABLE(pci, amplc_pci224_pci_table);
1133 
1134 static struct pci_driver amplc_pci224_pci_driver = {
1135         .name           = "amplc_pci224",
1136         .id_table       = amplc_pci224_pci_table,
1137         .probe          = amplc_pci224_pci_probe,
1138         .remove         = comedi_pci_auto_unconfig,
1139 };
1140 module_comedi_pci_driver(amplc_pci224_driver, amplc_pci224_pci_driver);
1141 
1142 MODULE_AUTHOR("Comedi http://www.comedi.org");
1143 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI224 and PCI234 AO boards");
1144 MODULE_LICENSE("GPL");
1145 

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