cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dt2811.c (17782B)


      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Comedi driver for Data Translation DT2811
      4 *
      5 * COMEDI - Linux Control and Measurement Device Interface
      6 * Copyright (C) David A. Schleef <ds@schleef.org>
      7 */
      8
      9/*
     10 * Driver: dt2811
     11 * Description: Data Translation DT2811
     12 * Author: ds
     13 * Devices: [Data Translation] DT2811-PGL (dt2811-pgl), DT2811-PGH (dt2811-pgh)
     14 * Status: works
     15 *
     16 * Configuration options:
     17 *   [0] - I/O port base address
     18 *   [1] - IRQ (optional, needed for async command support)
     19 *   [2] - A/D reference (# of analog inputs)
     20 *	   0 = single-ended (16 channels)
     21 *	   1 = differential (8 channels)
     22 *	   2 = pseudo-differential (16 channels)
     23 *   [3] - A/D range (deprecated, see below)
     24 *   [4] - D/A 0 range (deprecated, see below)
     25 *   [5] - D/A 1 range (deprecated, see below)
     26 *
     27 * Notes:
     28 *   - A/D ranges are not programmable but the gain is. The AI subdevice has
     29 *     a range_table containing all the possible analog input range/gain
     30 *     options for the dt2811-pgh or dt2811-pgl. Use the range that matches
     31 *     your board configuration and the desired gain to correctly convert
     32 *     between data values and physical units and to set the correct output
     33 *     gain.
     34 *   - D/A ranges are not programmable. The AO subdevice has a range_table
     35 *     containing all the possible analog output ranges. Use the range
     36 *     that matches your board configuration to convert between data
     37 *     values and physical units.
     38 */
     39
     40#include <linux/module.h>
     41#include <linux/interrupt.h>
     42#include <linux/delay.h>
     43#include <linux/comedi/comedidev.h>
     44
     45/*
     46 * Register I/O map
     47 */
     48#define DT2811_ADCSR_REG		0x00	/* r/w  A/D Control/Status */
     49#define DT2811_ADCSR_ADDONE		BIT(7)	/* r      1=A/D conv done */
     50#define DT2811_ADCSR_ADERROR		BIT(6)	/* r      1=A/D error */
     51#define DT2811_ADCSR_ADBUSY		BIT(5)	/* r      1=A/D busy */
     52#define DT2811_ADCSR_CLRERROR		BIT(4)
     53#define DT2811_ADCSR_DMAENB		BIT(3)	/* r/w    1=dma ena */
     54#define DT2811_ADCSR_INTENB		BIT(2)	/* r/w    1=interrupts ena */
     55#define DT2811_ADCSR_ADMODE(x)		(((x) & 0x3) << 0)
     56
     57#define DT2811_ADGCR_REG		0x01	/* r/w  A/D Gain/Channel */
     58#define DT2811_ADGCR_GAIN(x)		(((x) & 0x3) << 6)
     59#define DT2811_ADGCR_CHAN(x)		(((x) & 0xf) << 0)
     60
     61#define DT2811_ADDATA_LO_REG		0x02	/* r   A/D Data low byte */
     62#define DT2811_ADDATA_HI_REG		0x03	/* r   A/D Data high byte */
     63
     64#define DT2811_DADATA_LO_REG(x)		(0x02 + ((x) * 2)) /* w D/A Data low */
     65#define DT2811_DADATA_HI_REG(x)		(0x03 + ((x) * 2)) /* w D/A Data high */
     66
     67#define DT2811_DI_REG			0x06	/* r   Digital Input Port 0 */
     68#define DT2811_DO_REG			0x06	/* w   Digital Output Port 1 */
     69
     70#define DT2811_TMRCTR_REG		0x07	/* r/w  Timer/Counter */
     71#define DT2811_TMRCTR_MANTISSA(x)	(((x) & 0x7) << 3)
     72#define DT2811_TMRCTR_EXPONENT(x)	(((x) & 0x7) << 0)
     73
     74#define DT2811_OSC_BASE			1666	/* 600 kHz = 1666.6667ns */
     75
     76/*
     77 * Timer frequency control:
     78 *   DT2811_TMRCTR_MANTISSA	DT2811_TMRCTR_EXPONENT
     79 *   val  divisor  frequency	val  multiply divisor/divide frequency by
     80 *    0      1      600 kHz	 0   1
     81 *    1     10       60 kHz	 1   10
     82 *    2      2      300 kHz	 2   100
     83 *    3      3      200 kHz	 3   1000
     84 *    4      4      150 kHz	 4   10000
     85 *    5      5      120 kHz	 5   100000
     86 *    6      6      100 kHz	 6   1000000
     87 *    7     12       50 kHz	 7   10000000
     88 */
     89static const unsigned int dt2811_clk_dividers[] = {
     90	1, 10, 2, 3, 4, 5, 6, 12
     91};
     92
     93static const unsigned int dt2811_clk_multipliers[] = {
     94	1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
     95};
     96
     97/*
     98 * The Analog Input range is set using jumpers on the board.
     99 *
    100 * Input Range		W9  W10
    101 * -5V to +5V		In  Out
    102 * -2.5V to +2.5V	In  In
    103 * 0V to +5V		Out In
    104 *
    105 * The gain may be set to 1, 2, 4, or 8 (on the dt2811-pgh) or to
    106 * 1, 10, 100, 500 (on the dt2811-pgl).
    107 */
    108static const struct comedi_lrange dt2811_pgh_ai_ranges = {
    109	12, {
    110		BIP_RANGE(5),		/* range 0: gain=1 */
    111		BIP_RANGE(2.5),		/* range 1: gain=2 */
    112		BIP_RANGE(1.25),	/* range 2: gain=4 */
    113		BIP_RANGE(0.625),	/* range 3: gain=8 */
    114
    115		BIP_RANGE(2.5),		/* range 0+4: gain=1 */
    116		BIP_RANGE(1.25),	/* range 1+4: gain=2 */
    117		BIP_RANGE(0.625),	/* range 2+4: gain=4 */
    118		BIP_RANGE(0.3125),	/* range 3+4: gain=8 */
    119
    120		UNI_RANGE(5),		/* range 0+8: gain=1 */
    121		UNI_RANGE(2.5),		/* range 1+8: gain=2 */
    122		UNI_RANGE(1.25),	/* range 2+8: gain=4 */
    123		UNI_RANGE(0.625)	/* range 3+8: gain=8 */
    124	}
    125};
    126
    127static const struct comedi_lrange dt2811_pgl_ai_ranges = {
    128	12, {
    129		BIP_RANGE(5),		/* range 0: gain=1 */
    130		BIP_RANGE(0.5),		/* range 1: gain=10 */
    131		BIP_RANGE(0.05),	/* range 2: gain=100 */
    132		BIP_RANGE(0.01),	/* range 3: gain=500 */
    133
    134		BIP_RANGE(2.5),		/* range 0+4: gain=1 */
    135		BIP_RANGE(0.25),	/* range 1+4: gain=10 */
    136		BIP_RANGE(0.025),	/* range 2+4: gain=100 */
    137		BIP_RANGE(0.005),	/* range 3+4: gain=500 */
    138
    139		UNI_RANGE(5),		/* range 0+8: gain=1 */
    140		UNI_RANGE(0.5),		/* range 1+8: gain=10 */
    141		UNI_RANGE(0.05),	/* range 2+8: gain=100 */
    142		UNI_RANGE(0.01)		/* range 3+8: gain=500 */
    143	}
    144};
    145
    146/*
    147 * The Analog Output range is set per-channel using jumpers on the board.
    148 *
    149 *			DAC0 Jumpers		DAC1 Jumpers
    150 * Output Range		W5  W6  W7  W8		W1  W2  W3  W4
    151 * -5V to +5V		In  Out In  Out		In  Out In  Out
    152 * -2.5V to +2.5V	In  Out Out In		In  Out Out In
    153 * 0 to +5V		Out In  Out In		Out In  Out In
    154 */
    155static const struct comedi_lrange dt2811_ao_ranges = {
    156	3, {
    157		BIP_RANGE(5),	/* default setting from factory */
    158		BIP_RANGE(2.5),
    159		UNI_RANGE(5)
    160	}
    161};
    162
    163struct dt2811_board {
    164	const char *name;
    165	unsigned int is_pgh:1;
    166};
    167
    168static const struct dt2811_board dt2811_boards[] = {
    169	{
    170		.name		= "dt2811-pgh",
    171		.is_pgh		= 1,
    172	}, {
    173		.name		= "dt2811-pgl",
    174	},
    175};
    176
    177struct dt2811_private {
    178	unsigned int ai_divisor;
    179};
    180
    181static unsigned int dt2811_ai_read_sample(struct comedi_device *dev,
    182					  struct comedi_subdevice *s)
    183{
    184	unsigned int val;
    185
    186	val = inb(dev->iobase + DT2811_ADDATA_LO_REG) |
    187	      (inb(dev->iobase + DT2811_ADDATA_HI_REG) << 8);
    188
    189	return val & s->maxdata;
    190}
    191
    192static irqreturn_t dt2811_interrupt(int irq, void *d)
    193{
    194	struct comedi_device *dev = d;
    195	struct comedi_subdevice *s = dev->read_subdev;
    196	struct comedi_async *async = s->async;
    197	struct comedi_cmd *cmd = &async->cmd;
    198	unsigned int status;
    199
    200	if (!dev->attached)
    201		return IRQ_NONE;
    202
    203	status = inb(dev->iobase + DT2811_ADCSR_REG);
    204
    205	if (status & DT2811_ADCSR_ADERROR) {
    206		async->events |= COMEDI_CB_OVERFLOW;
    207
    208		outb(status | DT2811_ADCSR_CLRERROR,
    209		     dev->iobase + DT2811_ADCSR_REG);
    210	}
    211
    212	if (status & DT2811_ADCSR_ADDONE) {
    213		unsigned short val;
    214
    215		val = dt2811_ai_read_sample(dev, s);
    216		comedi_buf_write_samples(s, &val, 1);
    217	}
    218
    219	if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
    220		async->events |= COMEDI_CB_EOA;
    221
    222	comedi_handle_events(dev, s);
    223
    224	return IRQ_HANDLED;
    225}
    226
    227static int dt2811_ai_cancel(struct comedi_device *dev,
    228			    struct comedi_subdevice *s)
    229{
    230	/*
    231	 * Mode 0
    232	 * Single conversion
    233	 *
    234	 * Loading a chanspec will trigger a conversion.
    235	 */
    236	outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
    237
    238	return 0;
    239}
    240
    241static void dt2811_ai_set_chanspec(struct comedi_device *dev,
    242				   unsigned int chanspec)
    243{
    244	unsigned int chan = CR_CHAN(chanspec);
    245	unsigned int range = CR_RANGE(chanspec);
    246
    247	outb(DT2811_ADGCR_CHAN(chan) | DT2811_ADGCR_GAIN(range),
    248	     dev->iobase + DT2811_ADGCR_REG);
    249}
    250
    251static int dt2811_ai_cmd(struct comedi_device *dev,
    252			 struct comedi_subdevice *s)
    253{
    254	struct dt2811_private *devpriv = dev->private;
    255	struct comedi_cmd *cmd = &s->async->cmd;
    256	unsigned int mode;
    257
    258	if (cmd->start_src == TRIG_NOW) {
    259		/*
    260		 * Mode 1
    261		 * Continuous conversion, internal trigger and clock
    262		 *
    263		 * This resets the trigger flip-flop, disabling A/D strobes.
    264		 * The timer/counter register is loaded with the division
    265		 * ratio which will give the required sample rate.
    266		 *
    267		 * Loading the first chanspec sets the trigger flip-flop,
    268		 * enabling the timer/counter. A/D strobes are then generated
    269		 * at the rate set by the internal clock/divider.
    270		 */
    271		mode = DT2811_ADCSR_ADMODE(1);
    272	} else { /* TRIG_EXT */
    273		if (cmd->convert_src == TRIG_TIMER) {
    274			/*
    275			 * Mode 2
    276			 * Continuous conversion, external trigger
    277			 *
    278			 * Similar to Mode 1, with the exception that the
    279			 * trigger flip-flop must be set by a negative edge
    280			 * on the external trigger input.
    281			 */
    282			mode = DT2811_ADCSR_ADMODE(2);
    283		} else { /* TRIG_EXT */
    284			/*
    285			 * Mode 3
    286			 * Continuous conversion, external trigger, clock
    287			 *
    288			 * Similar to Mode 2, with the exception that the
    289			 * conversion rate is set by the frequency on the
    290			 * external clock/divider.
    291			 */
    292			mode = DT2811_ADCSR_ADMODE(3);
    293		}
    294	}
    295	outb(mode | DT2811_ADCSR_INTENB, dev->iobase + DT2811_ADCSR_REG);
    296
    297	/* load timer */
    298	outb(devpriv->ai_divisor, dev->iobase + DT2811_TMRCTR_REG);
    299
    300	/* load chanspec - enables timer */
    301	dt2811_ai_set_chanspec(dev, cmd->chanlist[0]);
    302
    303	return 0;
    304}
    305
    306static unsigned int dt2811_ns_to_timer(unsigned int *nanosec,
    307				       unsigned int flags)
    308{
    309	unsigned long long ns;
    310	unsigned int ns_lo = COMEDI_MIN_SPEED;
    311	unsigned int ns_hi = 0;
    312	unsigned int divisor_hi = 0;
    313	unsigned int divisor_lo = 0;
    314	unsigned int _div;
    315	unsigned int _mult;
    316
    317	/*
    318	 * Work through all the divider/multiplier values to find the two
    319	 * closest divisors to generate the requested nanosecond timing.
    320	 */
    321	for (_div = 0; _div <= 7; _div++) {
    322		for (_mult = 0; _mult <= 7; _mult++) {
    323			unsigned int div = dt2811_clk_dividers[_div];
    324			unsigned int mult = dt2811_clk_multipliers[_mult];
    325			unsigned long long divider = div * mult;
    326			unsigned int divisor = DT2811_TMRCTR_MANTISSA(_div) |
    327					       DT2811_TMRCTR_EXPONENT(_mult);
    328
    329			/*
    330			 * The timer can be configured to run at a slowest
    331			 * speed of 0.005hz (600 Khz/120000000), which requires
    332			 * 37-bits to represent the nanosecond value. Limit the
    333			 * slowest timing to what comedi handles (32-bits).
    334			 */
    335			ns = divider * DT2811_OSC_BASE;
    336			if (ns > COMEDI_MIN_SPEED)
    337				continue;
    338
    339			/* Check for fastest found timing */
    340			if (ns <= *nanosec && ns > ns_hi) {
    341				ns_hi = ns;
    342				divisor_hi = divisor;
    343			}
    344			/* Check for slowest found timing */
    345			if (ns >= *nanosec && ns < ns_lo) {
    346				ns_lo = ns;
    347				divisor_lo = divisor;
    348			}
    349		}
    350	}
    351
    352	/*
    353	 * The slowest found timing will be invalid if the requested timing
    354	 * is faster than what can be generated by the timer. Fix it so that
    355	 * CMDF_ROUND_UP returns valid timing.
    356	 */
    357	if (ns_lo == COMEDI_MIN_SPEED) {
    358		ns_lo = ns_hi;
    359		divisor_lo = divisor_hi;
    360	}
    361	/*
    362	 * The fastest found timing will be invalid if the requested timing
    363	 * is less than what can be generated by the timer. Fix it so that
    364	 * CMDF_ROUND_NEAREST and CMDF_ROUND_DOWN return valid timing.
    365	 */
    366	if (ns_hi == 0) {
    367		ns_hi = ns_lo;
    368		divisor_hi = divisor_lo;
    369	}
    370
    371	switch (flags & CMDF_ROUND_MASK) {
    372	case CMDF_ROUND_NEAREST:
    373	default:
    374		if (ns_hi - *nanosec < *nanosec - ns_lo) {
    375			*nanosec = ns_lo;
    376			return divisor_lo;
    377		}
    378		*nanosec = ns_hi;
    379		return divisor_hi;
    380	case CMDF_ROUND_UP:
    381		*nanosec = ns_lo;
    382		return divisor_lo;
    383	case CMDF_ROUND_DOWN:
    384		*nanosec = ns_hi;
    385		return divisor_hi;
    386	}
    387}
    388
    389static int dt2811_ai_cmdtest(struct comedi_device *dev,
    390			     struct comedi_subdevice *s,
    391			     struct comedi_cmd *cmd)
    392{
    393	struct dt2811_private *devpriv = dev->private;
    394	unsigned int arg;
    395	int err = 0;
    396
    397	/* Step 1 : check if triggers are trivially valid */
    398
    399	err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
    400	err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
    401	err |= comedi_check_trigger_src(&cmd->convert_src,
    402					TRIG_TIMER | TRIG_EXT);
    403	err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
    404	err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
    405
    406	if (err)
    407		return 1;
    408
    409	/* Step 2a : make sure trigger sources are unique */
    410
    411	err |= comedi_check_trigger_is_unique(cmd->start_src);
    412	err |= comedi_check_trigger_is_unique(cmd->convert_src);
    413	err |= comedi_check_trigger_is_unique(cmd->stop_src);
    414
    415	/* Step 2b : and mutually compatible */
    416
    417	if (cmd->convert_src == TRIG_EXT && cmd->start_src != TRIG_EXT)
    418		err |= -EINVAL;
    419
    420	if (err)
    421		return 2;
    422
    423	/* Step 3: check if arguments are trivially valid */
    424
    425	err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
    426	err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
    427	if (cmd->convert_src == TRIG_TIMER)
    428		err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 12500);
    429	err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
    430					   cmd->chanlist_len);
    431	if (cmd->stop_src == TRIG_COUNT)
    432		err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
    433	else	/* TRIG_NONE */
    434		err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
    435
    436	if (err)
    437		return 3;
    438
    439	/* Step 4: fix up any arguments */
    440
    441	if (cmd->convert_src == TRIG_TIMER) {
    442		arg = cmd->convert_arg;
    443		devpriv->ai_divisor = dt2811_ns_to_timer(&arg, cmd->flags);
    444		err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
    445	} else { /* TRIG_EXT */
    446		/* The convert_arg is used to set the divisor. */
    447		devpriv->ai_divisor = cmd->convert_arg;
    448	}
    449
    450	if (err)
    451		return 4;
    452
    453	/* Step 5: check channel list if it exists */
    454
    455	return 0;
    456}
    457
    458static int dt2811_ai_eoc(struct comedi_device *dev,
    459			 struct comedi_subdevice *s,
    460			 struct comedi_insn *insn,
    461			 unsigned long context)
    462{
    463	unsigned int status;
    464
    465	status = inb(dev->iobase + DT2811_ADCSR_REG);
    466	if ((status & DT2811_ADCSR_ADBUSY) == 0)
    467		return 0;
    468	return -EBUSY;
    469}
    470
    471static int dt2811_ai_insn_read(struct comedi_device *dev,
    472			       struct comedi_subdevice *s,
    473			       struct comedi_insn *insn,
    474			       unsigned int *data)
    475{
    476	int ret;
    477	int i;
    478
    479	/* We will already be in Mode 0 */
    480	for (i = 0; i < insn->n; i++) {
    481		/* load chanspec and trigger conversion */
    482		dt2811_ai_set_chanspec(dev, insn->chanspec);
    483
    484		ret = comedi_timeout(dev, s, insn, dt2811_ai_eoc, 0);
    485		if (ret)
    486			return ret;
    487
    488		data[i] = dt2811_ai_read_sample(dev, s);
    489	}
    490
    491	return insn->n;
    492}
    493
    494static int dt2811_ao_insn_write(struct comedi_device *dev,
    495				struct comedi_subdevice *s,
    496				struct comedi_insn *insn,
    497				unsigned int *data)
    498{
    499	unsigned int chan = CR_CHAN(insn->chanspec);
    500	unsigned int val = s->readback[chan];
    501	int i;
    502
    503	for (i = 0; i < insn->n; i++) {
    504		val = data[i];
    505		outb(val & 0xff, dev->iobase + DT2811_DADATA_LO_REG(chan));
    506		outb((val >> 8) & 0xff,
    507		     dev->iobase + DT2811_DADATA_HI_REG(chan));
    508	}
    509	s->readback[chan] = val;
    510
    511	return insn->n;
    512}
    513
    514static int dt2811_di_insn_bits(struct comedi_device *dev,
    515			       struct comedi_subdevice *s,
    516			       struct comedi_insn *insn,
    517			       unsigned int *data)
    518{
    519	data[1] = inb(dev->iobase + DT2811_DI_REG);
    520
    521	return insn->n;
    522}
    523
    524static int dt2811_do_insn_bits(struct comedi_device *dev,
    525			       struct comedi_subdevice *s,
    526			       struct comedi_insn *insn,
    527			       unsigned int *data)
    528{
    529	if (comedi_dio_update_state(s, data))
    530		outb(s->state, dev->iobase + DT2811_DO_REG);
    531
    532	data[1] = s->state;
    533
    534	return insn->n;
    535}
    536
    537static void dt2811_reset(struct comedi_device *dev)
    538{
    539	/* This is the initialization sequence from the users manual */
    540	outb(DT2811_ADCSR_ADMODE(0), dev->iobase + DT2811_ADCSR_REG);
    541	usleep_range(100, 1000);
    542	inb(dev->iobase + DT2811_ADDATA_LO_REG);
    543	inb(dev->iobase + DT2811_ADDATA_HI_REG);
    544	outb(DT2811_ADCSR_ADMODE(0) | DT2811_ADCSR_CLRERROR,
    545	     dev->iobase + DT2811_ADCSR_REG);
    546}
    547
    548static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
    549{
    550	const struct dt2811_board *board = dev->board_ptr;
    551	struct dt2811_private *devpriv;
    552	struct comedi_subdevice *s;
    553	int ret;
    554
    555	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
    556	if (!devpriv)
    557		return -ENOMEM;
    558
    559	ret = comedi_request_region(dev, it->options[0], 0x8);
    560	if (ret)
    561		return ret;
    562
    563	dt2811_reset(dev);
    564
    565	/* IRQ's 2,3,5,7 are valid for async command support */
    566	if (it->options[1] <= 7  && (BIT(it->options[1]) & 0xac)) {
    567		ret = request_irq(it->options[1], dt2811_interrupt, 0,
    568				  dev->board_name, dev);
    569		if (ret == 0)
    570			dev->irq = it->options[1];
    571	}
    572
    573	ret = comedi_alloc_subdevices(dev, 4);
    574	if (ret)
    575		return ret;
    576
    577	/* Analog Input subdevice */
    578	s = &dev->subdevices[0];
    579	s->type		= COMEDI_SUBD_AI;
    580	s->subdev_flags	= SDF_READABLE |
    581			  ((it->options[2] == 1) ? SDF_DIFF :
    582			   (it->options[2] == 2) ? SDF_COMMON : SDF_GROUND);
    583	s->n_chan	= (it->options[2] == 1) ? 8 : 16;
    584	s->maxdata	= 0x0fff;
    585	s->range_table	= board->is_pgh ? &dt2811_pgh_ai_ranges
    586					: &dt2811_pgl_ai_ranges;
    587	s->insn_read	= dt2811_ai_insn_read;
    588	if (dev->irq) {
    589		dev->read_subdev = s;
    590		s->subdev_flags	|= SDF_CMD_READ;
    591		s->len_chanlist	= 1;
    592		s->do_cmdtest	= dt2811_ai_cmdtest;
    593		s->do_cmd	= dt2811_ai_cmd;
    594		s->cancel	= dt2811_ai_cancel;
    595	}
    596
    597	/* Analog Output subdevice */
    598	s = &dev->subdevices[1];
    599	s->type		= COMEDI_SUBD_AO;
    600	s->subdev_flags	= SDF_WRITABLE;
    601	s->n_chan	= 2;
    602	s->maxdata	= 0x0fff;
    603	s->range_table	= &dt2811_ao_ranges;
    604	s->insn_write	= dt2811_ao_insn_write;
    605
    606	ret = comedi_alloc_subdev_readback(s);
    607	if (ret)
    608		return ret;
    609
    610	/* Digital Input subdevice */
    611	s = &dev->subdevices[2];
    612	s->type		= COMEDI_SUBD_DI;
    613	s->subdev_flags	= SDF_READABLE;
    614	s->n_chan	= 8;
    615	s->maxdata	= 1;
    616	s->range_table	= &range_digital;
    617	s->insn_bits	= dt2811_di_insn_bits;
    618
    619	/* Digital Output subdevice */
    620	s = &dev->subdevices[3];
    621	s->type		= COMEDI_SUBD_DO;
    622	s->subdev_flags	= SDF_WRITABLE;
    623	s->n_chan	= 8;
    624	s->maxdata	= 1;
    625	s->range_table	= &range_digital;
    626	s->insn_bits	= dt2811_do_insn_bits;
    627
    628	return 0;
    629}
    630
    631static struct comedi_driver dt2811_driver = {
    632	.driver_name	= "dt2811",
    633	.module		= THIS_MODULE,
    634	.attach		= dt2811_attach,
    635	.detach		= comedi_legacy_detach,
    636	.board_name	= &dt2811_boards[0].name,
    637	.num_names	= ARRAY_SIZE(dt2811_boards),
    638	.offset		= sizeof(struct dt2811_board),
    639};
    640module_comedi_driver(dt2811_driver);
    641
    642MODULE_AUTHOR("Comedi https://www.comedi.org");
    643MODULE_DESCRIPTION("Comedi driver for Data Translation DT2811 series boards");
    644MODULE_LICENSE("GPL");