// SPDX-License-Identifier: GPL-2.0
/*
* comedi/drivers/pcl812.c
*
* Author: Michal Dobes <dobes@tesnet.cz>
*
* hardware driver for Advantech cards
* card: PCL-812, PCL-812PG, PCL-813, PCL-813B
* driver: pcl812, pcl812pg, pcl813, pcl813b
* and for ADlink cards
* card: ACL-8112DG, ACL-8112HG, ACL-8112PG, ACL-8113, ACL-8216
* driver: acl8112dg, acl8112hg, acl8112pg, acl8113, acl8216
* and for ICP DAS cards
* card: ISO-813, A-821PGH, A-821PGL, A-821PGL-NDA, A-822PGH, A-822PGL,
* driver: iso813, a821pgh, a-821pgl, a-821pglnda, a822pgh, a822pgl,
* card: A-823PGH, A-823PGL, A-826PG
* driver: a823pgh, a823pgl, a826pg
*/
/*
* Driver: pcl812
* Description: Advantech PCL-812/PG, PCL-813/B,
* ADLink ACL-8112DG/HG/PG, ACL-8113, ACL-8216,
* ICP DAS A-821PGH/PGL/PGL-NDA, A-822PGH/PGL, A-823PGH/PGL, A-826PG,
* ICP DAS ISO-813
* Author: Michal Dobes <dobes@tesnet.cz>
* Devices: [Advantech] PCL-812 (pcl812), PCL-812PG (pcl812pg),
* PCL-813 (pcl813), PCL-813B (pcl813b), [ADLink] ACL-8112DG (acl8112dg),
* ACL-8112HG (acl8112hg), ACL-8113 (acl-8113), ACL-8216 (acl8216),
* [ICP] ISO-813 (iso813), A-821PGH (a821pgh), A-821PGL (a821pgl),
* A-821PGL-NDA (a821pclnda), A-822PGH (a822pgh), A-822PGL (a822pgl),
* A-823PGH (a823pgh), A-823PGL (a823pgl), A-826PG (a826pg)
* Updated: Mon, 06 Aug 2007 12:03:15 +0100
* Status: works (I hope. My board fire up under my hands
* and I cann't test all features.)
*
* This driver supports insn and cmd interfaces. Some boards support only insn
* because their hardware don't allow more (PCL-813/B, ACL-8113, ISO-813).
* Data transfer over DMA is supported only when you measure only one
* channel, this is too hardware limitation of these boards.
*
* Options for PCL-812:
* [0] - IO Base
* [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
* [2] - DMA (0=disable, 1, 3)
* [3] - 0=trigger source is internal 8253 with 2MHz clock
* 1=trigger source is external
* [4] - 0=A/D input range is +/-10V
* 1=A/D input range is +/-5V
* 2=A/D input range is +/-2.5V
* 3=A/D input range is +/-1.25V
* 4=A/D input range is +/-0.625V
* 5=A/D input range is +/-0.3125V
* [5] - 0=D/A outputs 0-5V (internal reference -5V)
* 1=D/A outputs 0-10V (internal reference -10V)
* 2=D/A outputs unknown (external reference)
*
* Options for PCL-812PG, ACL-8112PG:
* [0] - IO Base
* [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
* [2] - DMA (0=disable, 1, 3)
* [3] - 0=trigger source is internal 8253 with 2MHz clock
* 1=trigger source is external
* [4] - 0=A/D have max +/-5V input
* 1=A/D have max +/-10V input
* [5] - 0=D/A outputs 0-5V (internal reference -5V)
* 1=D/A outputs 0-10V (internal reference -10V)
* 2=D/A outputs unknown (external reference)
*
* Options for ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH, ACL-8216, A-826PG:
* [0] - IO Base
* [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
* [2] - DMA (0=disable, 1, 3)
* [3] - 0=trigger source is internal 8253 with 2MHz clock
* 1=trigger source is external
* [4] - 0=A/D channels are S.E.
* 1=A/D channels are DIFF
* [5] - 0=D/A outputs 0-5V (internal reference -5V)
* 1=D/A outputs 0-10V (internal reference -10V)
* 2=D/A outputs unknown (external reference)
*
* Options for A-821PGL/PGH:
* [0] - IO Base
* [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
* [2] - 0=A/D channels are S.E.
* 1=A/D channels are DIFF
* [3] - 0=D/A output 0-5V (internal reference -5V)
* 1=D/A output 0-10V (internal reference -10V)
*
* Options for A-821PGL-NDA:
* [0] - IO Base
* [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
* [2] - 0=A/D channels are S.E.
* 1=A/D channels are DIFF
*
* Options for PCL-813:
* [0] - IO Base
*
* Options for PCL-813B:
* [0] - IO Base
* [1] - 0= bipolar inputs
* 1= unipolar inputs
*
* Options for ACL-8113, ISO-813:
* [0] - IO Base
* [1] - 0= 10V bipolar inputs
* 1= 10V unipolar inputs
* 2= 20V bipolar inputs
* 3= 20V unipolar inputs
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/gfp.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/comedi/comedidev.h>
#include <linux/comedi/comedi_8254.h>
#include <linux/comedi/comedi_isadma.h>
/*
* Register I/O map
*/
#define PCL812_TIMER_BASE
0x00
#define PCL812_AI_LSB_REG
0x04
#define PCL812_AI_MSB_REG
0x05
#define PCL812_AI_MSB_DRDY BIT(
4)
#define PCL812_AO_LSB_REG(x) (
0x04 + ((x) *
2))
#define PCL812_AO_MSB_REG(x) (
0x05 + ((x) *
2))
#define PCL812_DI_LSB_REG
0x06
#define PCL812_DI_MSB_REG
0x07
#define PCL812_STATUS_REG
0x08
#define PCL812_STATUS_DRDY BIT(
5)
#define PCL812_RANGE_REG
0x09
#define PCL812_MUX_REG
0x0a
#define PCL812_MUX_CHAN(x) ((x) <<
0)
#define PCL812_MUX_CS0 BIT(
4)
#define PCL812_MUX_CS1 BIT(
5)
#define PCL812_CTRL_REG
0x0b
#define PCL812_CTRL_TRIG(x) (((x) &
0x7) <<
0)
#define PCL812_CTRL_DISABLE_TRIG PCL812_CTRL_TRIG(
0)
#define PCL812_CTRL_SOFT_TRIG PCL812_CTRL_TRIG(
1)
#define PCL812_CTRL_PACER_DMA_TRIG PCL812_CTRL_TRIG(
2)
#define PCL812_CTRL_PACER_EOC_TRIG PCL812_CTRL_TRIG(
6)
#define PCL812_SOFTTRIG_REG
0x0c
#define PCL812_DO_LSB_REG
0x0d
#define PCL812_DO_MSB_REG
0x0e
#define MAX_CHANLIST_LEN
256 /* length of scan list */
static const struct comedi_lrange range_pcl812pg_ai = {
5, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625),
BIP_RANGE(
0.
3125)
}
};
static const struct comedi_lrange range_pcl812pg2_ai = {
5, {
BIP_RANGE(
10),
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625)
}
};
static const struct comedi_lrange range812_bipolar1_25 = {
1, {
BIP_RANGE(
1.
25)
}
};
static const struct comedi_lrange range812_bipolar0_625 = {
1, {
BIP_RANGE(
0.
625)
}
};
static const struct comedi_lrange range812_bipolar0_3125 = {
1, {
BIP_RANGE(
0.
3125)
}
};
static const struct comedi_lrange range_pcl813b_ai = {
4, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625)
}
};
static const struct comedi_lrange range_pcl813b2_ai = {
4, {
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5),
UNI_RANGE(
1.
25)
}
};
static const struct comedi_lrange range_iso813_1_ai = {
5, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625),
BIP_RANGE(
0.
3125)
}
};
static const struct comedi_lrange range_iso813_1_2_ai = {
5, {
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5),
UNI_RANGE(
1.
25),
UNI_RANGE(
0.
625)
}
};
static const struct comedi_lrange range_iso813_2_ai = {
4, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625)
}
};
static const struct comedi_lrange range_iso813_2_2_ai = {
4, {
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5),
UNI_RANGE(
1.
25)
}
};
static const struct comedi_lrange range_acl8113_1_ai = {
4, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625)
}
};
static const struct comedi_lrange range_acl8113_1_2_ai = {
4, {
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5),
UNI_RANGE(
1.
25)
}
};
static const struct comedi_lrange range_acl8113_2_ai = {
3, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25)
}
};
static const struct comedi_lrange range_acl8113_2_2_ai = {
3, {
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5)
}
};
static const struct comedi_lrange range_acl8112dg_ai = {
9, {
BIP_RANGE(
5),
BIP_RANGE(
2.
5),
BIP_RANGE(
1.
25),
BIP_RANGE(
0.
625),
UNI_RANGE(
10),
UNI_RANGE(
5),
UNI_RANGE(
2.
5),
UNI_RANGE(
1.
25),
BIP_RANGE(
10)
}
};
static const struct comedi_lrange range_acl8112hg_ai = {
12, {
BIP_RANGE(
5),
BIP_RANGE(
0.
5),
BIP_RANGE(
0.
05),
BIP_RANGE(
0.
005),
UNI_RANGE(
10),
UNI_RANGE(
1),
UNI_RANGE(
0.
1),
UNI_RANGE(
0.
01),
BIP_RANGE(
10),
BIP_RANGE(
1),
BIP_RANGE(
0.
1),
BIP_RANGE(
0.
01)
}
};
static const struct comedi_lrange range_a821pgh_ai = {
4, {
BIP_RANGE(
5),
BIP_RANGE(
0.
5),
BIP_RANGE(
0.
05),
BIP_RANGE(
0.
005)
}
};
enum pcl812_boardtype {
BOARD_PCL812PG =
0,
/* and ACL-8112PG */
BOARD_PCL813B =
1,
BOARD_PCL812 =
2,
BOARD_PCL813 =
3,
BOARD_ISO813 =
5,
BOARD_ACL8113 =
6,
BOARD_ACL8112 =
7,
/* ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH */
BOARD_ACL8216 =
8,
/* and ICP DAS A-826PG */
BOARD_A821 =
9,
/* PGH, PGL, PGL/NDA versions */
};
struct pcl812_board {
const char *name;
enum pcl812_boardtype board_type;
int n_aichan;
int n_aochan;
unsigned int ai_ns_min;
const struct comedi_lrange *rangelist_ai;
unsigned int irq_bits;
unsigned int has_dma:
1;
unsigned int has_16bit_ai:
1;
unsigned int has_mpc508_mux:
1;
unsigned int has_dio:
1;
};
static const struct pcl812_board boardtypes[] = {
{
.name =
"pcl812",
.board_type = BOARD_PCL812,
.n_aichan =
16,
.n_aochan =
2,
.ai_ns_min =
33000,
.rangelist_ai = &range_bipolar10,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"pcl812pg",
.board_type = BOARD_PCL812PG,
.n_aichan =
16,
.n_aochan =
2,
.ai_ns_min =
33000,
.rangelist_ai = &range_pcl812pg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"acl8112pg",
.board_type = BOARD_PCL812PG,
.n_aichan =
16,
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_pcl812pg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"acl8112dg",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_acl8112dg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_mpc508_mux =
1,
.has_dio =
1,
}, {
.name =
"acl8112hg",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_acl8112hg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_mpc508_mux =
1,
.has_dio =
1,
}, {
.name =
"a821pgl",
.board_type = BOARD_A821,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
1,
.ai_ns_min =
10000,
.rangelist_ai = &range_pcl813b_ai,
.irq_bits =
0x000c,
.has_dio =
1,
}, {
.name =
"a821pglnda",
.board_type = BOARD_A821,
.n_aichan =
16,
/* 8 differential */
.ai_ns_min =
10000,
.rangelist_ai = &range_pcl813b_ai,
.irq_bits =
0x000c,
}, {
.name =
"a821pgh",
.board_type = BOARD_A821,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
1,
.ai_ns_min =
10000,
.rangelist_ai = &range_a821pgh_ai,
.irq_bits =
0x000c,
.has_dio =
1,
}, {
.name =
"a822pgl",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_acl8112dg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"a822pgh",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_acl8112hg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"a823pgl",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
8000,
.rangelist_ai = &range_acl8112dg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"a823pgh",
.board_type = BOARD_ACL8112,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
8000,
.rangelist_ai = &range_acl8112hg_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_dio =
1,
}, {
.name =
"pcl813",
.board_type = BOARD_PCL813,
.n_aichan =
32,
.rangelist_ai = &range_pcl813b_ai,
}, {
.name =
"pcl813b",
.board_type = BOARD_PCL813B,
.n_aichan =
32,
.rangelist_ai = &range_pcl813b_ai,
}, {
.name =
"acl8113",
.board_type = BOARD_ACL8113,
.n_aichan =
32,
.rangelist_ai = &range_acl8113_1_ai,
}, {
.name =
"iso813",
.board_type = BOARD_ISO813,
.n_aichan =
32,
.rangelist_ai = &range_iso813_1_ai,
}, {
.name =
"acl8216",
.board_type = BOARD_ACL8216,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_pcl813b2_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_16bit_ai =
1,
.has_mpc508_mux =
1,
.has_dio =
1,
}, {
.name =
"a826pg",
.board_type = BOARD_ACL8216,
.n_aichan =
16,
/* 8 differential */
.n_aochan =
2,
.ai_ns_min =
10000,
.rangelist_ai = &range_pcl813b2_ai,
.irq_bits =
0xdcfc,
.has_dma =
1,
.has_16bit_ai =
1,
.has_dio =
1,
},
};
struct pcl812_private {
struct comedi_isadma *dma;
unsigned char range_correction;
/* =1 we must add 1 to range number */
unsigned int last_ai_chanspec;
unsigned char mode_reg_int;
/* stored INT number for some cards */
unsigned int ai_poll_ptr;
/* how many samples transfer poll */
unsigned int max_812_ai_mode0_rangewait;
/* settling time for gain */
unsigned int use_diff:
1;
unsigned int use_mpc508:
1;
unsigned int use_ext_trg:
1;
unsigned int ai_dma:
1;
unsigned int ai_eos:
1;
};
static void pcl812_ai_setup_dma(
struct comedi_device *dev,
struct comedi_subdevice *s,
unsigned int unread_samples)
{
struct pcl812_private *devpriv = dev->
private;
struct comedi_isadma *dma = devpriv->dma;
struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
unsigned int bytes;
unsigned int max_samples;
unsigned int nsamples;
comedi_isadma_disable(dma->chan);
/* if using EOS, adapt DMA buffer to one scan */
bytes = devpriv->ai_eos ? comedi_bytes_per_scan(s) : desc->maxsize;
max_samples = comedi_bytes_to_samples(s, bytes);
/*
* Determine dma size based on the buffer size plus the number of
* unread samples and the number of samples remaining in the command.
*/
nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
if (nsamples > unread_samples) {
nsamples -= unread_samples;
desc->size = comedi_samples_to_bytes(s, nsamples);
comedi_isadma_program(desc);
}
}
static void pcl812_ai_set_chan_range(
struct comedi_device *dev,
unsigned int chanspec,
char wait)
{
struct pcl812_private *devpriv = dev->
private;
unsigned int chan = CR_CHAN(chanspec);
unsigned int range = CR_RANGE(chanspec);
unsigned int mux =
0;
if (chanspec == devpriv->last_ai_chanspec)
return;
devpriv->last_ai_chanspec = chanspec;
if (devpriv->use_mpc508) {
if (devpriv->use_diff) {
mux |= PCL812_MUX_CS0 | PCL812_MUX_CS1;
}
else {
if (chan <
8)
mux |= PCL812_MUX_CS0;
else
mux |= PCL812_MUX_CS1;
}
}
outb(mux | PCL812_MUX_CHAN(chan), dev->iobase + PCL812_MUX_REG);
outb(range + devpriv->range_correction, dev->iobase + PCL812_RANGE_REG);
if (wait)
/*
* XXX this depends on selected range and can be very long for
* some high gain ranges!
*/
udelay(devpriv->max_812_ai_mode0_rangewait);
}
static void pcl812_ai_clear_eoc(
struct comedi_device *dev)
{
/* writing any value clears the interrupt request */
outb(
0, dev->iobase + PCL812_STATUS_REG);
}
static void pcl812_ai_soft_trig(
struct comedi_device *dev)
{
/* writing any value triggers a software conversion */
outb(
255, dev->iobase + PCL812_SOFTTRIG_REG);
}
static unsigned int pcl812_ai_get_sample(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
unsigned int val;
val = inb(dev->iobase + PCL812_AI_MSB_REG) <<
8;
val |= inb(dev->iobase + PCL812_AI_LSB_REG);
return val & s->maxdata;
}
static int pcl812_ai_eoc(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
if (s->maxdata >
0x0fff) {
status = inb(dev->iobase + PCL812_STATUS_REG);
if ((status & PCL812_STATUS_DRDY) ==
0)
return 0;
}
else {
status = inb(dev->iobase + PCL812_AI_MSB_REG);
if ((status & PCL812_AI_MSB_DRDY) ==
0)
return 0;
}
return -EBUSY;
}
static int pcl812_ai_cmdtest(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
const struct pcl812_board *board = dev->board_ptr;
struct pcl812_private *devpriv = dev->
private;
int err =
0;
unsigned int flags;
/* Step 1 : check if triggers are trivially valid */
err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
if (devpriv->use_ext_trg)
flags = TRIG_EXT;
else
flags = TRIG_TIMER;
err |= comedi_check_trigger_src(&cmd->convert_src, flags);
err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
if (err)
return 1;
/* Step 2a : make sure trigger sources are unique */
err |= comedi_check_trigger_is_unique(cmd->stop_src);
/* Step 2b : and mutually compatible */
if (err)
return 2;
/* Step 3: check if arguments are trivially valid */
err |= comedi_check_trigger_arg_is(&cmd->start_arg,
0);
err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg,
0);
if (cmd->convert_src == TRIG_TIMER) {
err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
board->ai_ns_min);
}
else {
/* TRIG_EXT */
err |= comedi_check_trigger_arg_is(&cmd->convert_arg,
0);
}
err |= comedi_check_trigger_arg_min(&cmd->chanlist_len,
1);
err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
cmd->chanlist_len);
if (cmd->stop_src == TRIG_COUNT)
err |= comedi_check_trigger_arg_min(&cmd->stop_arg,
1);
else /* TRIG_NONE */
err |= comedi_check_trigger_arg_is(&cmd->stop_arg,
0);
if (err)
return 3;
/* step 4: fix up any arguments */
if (cmd->convert_src == TRIG_TIMER) {
unsigned int arg = cmd->convert_arg;
comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
}
if (err)
return 4;
return 0;
}
static int pcl812_ai_cmd(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct pcl812_private *devpriv = dev->
private;
struct comedi_isadma *dma = devpriv->dma;
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int ctrl =
0;
unsigned int i;
pcl812_ai_set_chan_range(dev, cmd->chanlist[
0],
1);
if (dma) {
/* check if we can use DMA transfer */
devpriv->ai_dma =
1;
for (i =
1; i < cmd->chanlist_len; i++)
if (cmd->chanlist[
0] != cmd->chanlist[i]) {
/* we cann't use DMA :-( */
devpriv->ai_dma =
0;
break;
}
}
else {
devpriv->ai_dma =
0;
}
devpriv->ai_poll_ptr =
0;
/* don't we want wake up every scan? */
if (cmd->flags & CMDF_WAKE_EOS) {
devpriv->ai_eos =
1;
/* DMA is useless for this situation */
if (cmd->chanlist_len ==
1)
devpriv->ai_dma =
0;
}
if (devpriv->ai_dma) {
/* setup and enable dma for the first buffer */
dma->cur_dma =
0;
pcl812_ai_setup_dma(dev, s,
0);
}
switch (cmd->convert_src) {
case TRIG_TIMER:
comedi_8254_update_divisors(dev->pacer);
comedi_8254_pacer_enable(dev->pacer,
1,
2,
true);
break;
}
if (devpriv->ai_dma)
ctrl |= PCL812_CTRL_PACER_DMA_TRIG;
else
ctrl |= PCL812_CTRL_PACER_EOC_TRIG;
outb(devpriv->mode_reg_int | ctrl, dev->iobase + PCL812_CTRL_REG);
return 0;
}
static bool pcl812_ai_next_chan(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct comedi_cmd *cmd = &s->async->cmd;
if (cmd->stop_src == TRIG_COUNT &&
s->async->scans_done >= cmd->stop_arg) {
s->async->events |= COMEDI_CB_EOA;
return false;
}
return true;
}
static void pcl812_handle_eoc(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct comedi_cmd *cmd = &s->async->cmd;
unsigned int chan = s->async->cur_chan;
unsigned int next_chan;
unsigned short val;
if (pcl812_ai_eoc(dev, s, NULL,
0)) {
dev_dbg(dev->class_dev,
"A/D cmd IRQ without DRDY!\n");
s->async->events |= COMEDI_CB_ERROR;
return;
}
val = pcl812_ai_get_sample(dev, s);
comedi_buf_write_samples(s, &val,
1);
/* Set up next channel. Added by abbotti 2010-01-20, but untested. */
next_chan = s->async->cur_chan;
if (cmd->chanlist[chan] != cmd->chanlist[next_chan])
pcl812_ai_set_chan_range(dev, cmd->chanlist[next_chan],
0);
pcl812_ai_next_chan(dev, s);
}
static void transfer_from_dma_buf(
struct comedi_device *dev,
struct comedi_subdevice *s,
unsigned short *ptr,
unsigned int bufptr,
unsigned int len)
{
unsigned int i;
unsigned short val;
for (i = len; i; i--) {
val = ptr[bufptr++];
comedi_buf_write_samples(s, &val,
1);
if (!pcl812_ai_next_chan(dev, s))
break;
}
}
static void pcl812_handle_dma(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct pcl812_private *devpriv = dev->
private;
struct comedi_isadma *dma = devpriv->dma;
struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
unsigned int nsamples;
int bufptr;
nsamples = comedi_bytes_to_samples(s, desc->size) -
devpriv->ai_poll_ptr;
bufptr = devpriv->ai_poll_ptr;
devpriv->ai_poll_ptr =
0;
/* restart dma with the next buffer */
dma->cur_dma =
1 - dma->cur_dma;
pcl812_ai_setup_dma(dev, s, nsamples);
transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples);
}
static irqreturn_t pcl812_interrupt(
int irq,
void *d)
{
struct comedi_device *dev = d;
struct comedi_subdevice *s = dev->read_subdev;
struct pcl812_private *devpriv = dev->
private;
if (!dev->attached) {
pcl812_ai_clear_eoc(dev);
return IRQ_HANDLED;
}
if (devpriv->ai_dma)
pcl812_handle_dma(dev, s);
else
pcl812_handle_eoc(dev, s);
pcl812_ai_clear_eoc(dev);
comedi_handle_events(dev, s);
return IRQ_HANDLED;
}
static int pcl812_ai_poll(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct pcl812_private *devpriv = dev->
private;
struct comedi_isadma *dma = devpriv->dma;
struct comedi_isadma_desc *desc;
unsigned long flags;
unsigned int poll;
int ret;
/* poll is valid only for DMA transfer */
if (!devpriv->ai_dma)
return 0;
spin_lock_irqsave(&dev->spinlock, flags);
poll = comedi_isadma_poll(dma);
poll = comedi_bytes_to_samples(s, poll);
if (poll > devpriv->ai_poll_ptr) {
desc = &dma->desc[dma->cur_dma];
transfer_from_dma_buf(dev, s, desc->virt_addr,
devpriv->ai_poll_ptr,
poll - devpriv->ai_poll_ptr);
/* new buffer position */
devpriv->ai_poll_ptr = poll;
ret = comedi_buf_n_bytes_ready(s);
}
else {
/* no new samples */
ret =
0;
}
spin_unlock_irqrestore(&dev->spinlock, flags);
return ret;
}
static int pcl812_ai_cancel(
struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct pcl812_private *devpriv = dev->
private;
if (devpriv->ai_dma)
comedi_isadma_disable(devpriv->dma->chan);
outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
dev->iobase + PCL812_CTRL_REG);
comedi_8254_pacer_enable(dev->pacer,
1,
2,
false);
pcl812_ai_clear_eoc(dev);
return 0;
}
static int pcl812_ai_insn_read(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct pcl812_private *devpriv = dev->
private;
int ret =
0;
int i;
outb(devpriv->mode_reg_int | PCL812_CTRL_SOFT_TRIG,
dev->iobase + PCL812_CTRL_REG);
pcl812_ai_set_chan_range(dev, insn->chanspec,
1);
for (i =
0; i < insn->n; i++) {
pcl812_ai_clear_eoc(dev);
pcl812_ai_soft_trig(dev);
ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc,
0);
if (ret)
break;
data[i] = pcl812_ai_get_sample(dev, s);
}
outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
dev->iobase + PCL812_CTRL_REG);
pcl812_ai_clear_eoc(dev);
return ret ? ret : insn->n;
}
static int pcl812_ao_insn_write(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
int i;
for (i =
0; i < insn->n; i++) {
val = data[i];
outb(val &
0xff, dev->iobase + PCL812_AO_LSB_REG(chan));
outb((val >>
8) &
0x0f, dev->iobase + PCL812_AO_MSB_REG(chan));
}
s->readback[chan] = val;
return insn->n;
}
static int pcl812_di_insn_bits(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
data[
1] = inb(dev->iobase + PCL812_DI_LSB_REG) |
(inb(dev->iobase + PCL812_DI_MSB_REG) <<
8);
return insn->n;
}
static int pcl812_do_insn_bits(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
if (comedi_dio_update_state(s, data)) {
outb(s->state &
0xff, dev->iobase + PCL812_DO_LSB_REG);
outb((s->state >>
8), dev->iobase + PCL812_DO_MSB_REG);
}
data[
1] = s->state;
return insn->n;
}
static void pcl812_reset(
struct comedi_device *dev)
{
const struct pcl812_board *board = dev->board_ptr;
struct pcl812_private *devpriv = dev->
private;
unsigned int chan;
/* disable analog input trigger */
outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
dev->iobase + PCL812_CTRL_REG);
pcl812_ai_clear_eoc(dev);
/*
* Invalidate last_ai_chanspec then set analog input to
* known channel/range.
*/
devpriv->last_ai_chanspec = CR_PACK(
16,
0,
0);
pcl812_ai_set_chan_range(dev, CR_PACK(
0,
0,
0),
0);
/* set analog output channels to 0V */
for (chan =
0; chan < board->n_aochan; chan++) {
outb(
0, dev->iobase + PCL812_AO_LSB_REG(chan));
outb(
0, dev->iobase + PCL812_AO_MSB_REG(chan));
}
/* set all digital outputs low */
if (board->has_dio) {
outb(
0, dev->iobase + PCL812_DO_MSB_REG);
outb(
0, dev->iobase + PCL812_DO_LSB_REG);
}
}
static void pcl812_set_ai_range_table(
struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_devconfig *it)
{
const struct pcl812_board *board = dev->board_ptr;
struct pcl812_private *devpriv = dev->
private;
switch (board->board_type) {
case BOARD_PCL812PG:
if (it->options[
4] ==
1)
s->range_table = &range_pcl812pg2_ai;
else
s->range_table = board->rangelist_ai;
break;
case BOARD_PCL812:
switch (it->options[
4]) {
case 0:
s->range_table = &range_bipolar10;
break;
case 1:
s->range_table = &range_bipolar5;
break;
case 2:
s->range_table = &range_bipolar2_5;
break;
case 3:
s->range_table = &range812_bipolar1_25;
break;
case 4:
s->range_table = &range812_bipolar0_625;
break;
case 5:
s->range_table = &range812_bipolar0_3125;
break;
default:
s->range_table = &range_bipolar10;
break;
}
break;
case BOARD_PCL813B:
if (it->options[
1] ==
1)
s->range_table = &range_pcl813b2_ai;
else
s->range_table = board->rangelist_ai;
break;
case BOARD_ISO813:
switch (it->options[
1]) {
case 0:
s->range_table = &range_iso813_1_ai;
break;
case 1:
s->range_table = &range_iso813_1_2_ai;
break;
case 2:
s->range_table = &range_iso813_2_ai;
devpriv->range_correction =
1;
break;
case 3:
s->range_table = &range_iso813_2_2_ai;
devpriv->range_correction =
1;
break;
default:
s->range_table = &range_iso813_1_ai;
break;
}
break;
case BOARD_ACL8113:
switch (it->options[
1]) {
case 0:
s->range_table = &range_acl8113_1_ai;
break;
case 1:
s->range_table = &range_acl8113_1_2_ai;
break;
case 2:
s->range_table = &range_acl8113_2_ai;
devpriv->range_correction =
1;
break;
case 3:
s->range_table = &range_acl8113_2_2_ai;
devpriv->range_correction =
1;
break;
default:
s->range_table = &range_acl8113_1_ai;
break;
}
break;
default:
s->range_table = board->rangelist_ai;
break;
}
}
static void pcl812_alloc_dma(
struct comedi_device *dev,
unsigned int dma_chan)
{
struct pcl812_private *devpriv = dev->
private;
/* only DMA channels 3 and 1 are valid */
if (!(dma_chan ==
3 || dma_chan ==
1))
return;
/* DMA uses two 8K buffers */
devpriv->dma = comedi_isadma_alloc(dev,
2, dma_chan, dma_chan,
PAGE_SIZE *
2, COMEDI_ISADMA_READ);
}
static void pcl812_free_dma(
struct comedi_device *dev)
{
struct pcl812_private *devpriv = dev->
private;
if (devpriv)
comedi_isadma_free(devpriv->dma);
}
static int pcl812_attach(
struct comedi_device *dev,
struct comedi_devconfig *it)
{
const struct pcl812_board *board = dev->board_ptr;
struct pcl812_private *devpriv;
struct comedi_subdevice *s;
int n_subdevices;
int subdev;
int ret;
devpriv = comedi_alloc_devpriv(dev,
sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
ret = comedi_request_region(dev, it->options[
0],
0x10);
if (ret)
return ret;
if (board->irq_bits) {
dev->pacer =
comedi_8254_io_alloc(dev->iobase + PCL812_TIMER_BASE,
I8254_OSC_BASE_2MHZ, I8254_IO8,
0);
if (IS_ERR(dev->pacer))
return PTR_ERR(dev->pacer);
if (it->options[
1] >
0 && it->options[
1] <
16 &&
(
1 << it->options[
1]) & board->irq_bits) {
ret = request_irq(it->options[
1], pcl812_interrupt,
0,
dev->board_name, dev);
if (ret ==
0)
dev->irq = it->options[
1];
}
}
/* we need an IRQ to do DMA on channel 3 or 1 */
if (dev->irq && board->has_dma)
pcl812_alloc_dma(dev, it->options[
2]);
/* differential analog inputs? */
switch (board->board_type) {
case BOARD_A821:
if (it->options[
2] ==
1)
devpriv->use_diff =
1;
break;
case BOARD_ACL8112:
case BOARD_ACL8216:
if (it->options[
4] ==
1)
devpriv->use_diff =
1;
break;
default:
break;
}
n_subdevices =
1;
/* all boardtypes have analog inputs */
if (board->n_aochan >
0)
n_subdevices++;
if (board->has_dio)
n_subdevices +=
2;
ret = comedi_alloc_subdevices(dev, n_subdevices);
if (ret)
return ret;
subdev =
0;
/* Analog Input subdevice */
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE;
if (devpriv->use_diff) {
s->subdev_flags |= SDF_DIFF;
s->n_chan = board->n_aichan /
2;
}
else {
s->subdev_flags |= SDF_GROUND;
s->n_chan = board->n_aichan;
}
s->maxdata = board->has_16bit_ai ?
0xffff :
0x0fff;
pcl812_set_ai_range_table(dev, s, it);
s->insn_read = pcl812_ai_insn_read;
if (dev->irq) {
dev->read_subdev = s;
s->subdev_flags |= SDF_CMD_READ;
s->len_chanlist = MAX_CHANLIST_LEN;
s->do_cmdtest = pcl812_ai_cmdtest;
s->do_cmd = pcl812_ai_cmd;
s->poll = pcl812_ai_poll;
s->cancel = pcl812_ai_cancel;
}
devpriv->use_mpc508 = board->has_mpc508_mux;
subdev++;
/* analog output */
if (board->n_aochan >
0) {
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
s->n_chan = board->n_aochan;
s->maxdata =
0xfff;
switch (board->board_type) {
case BOARD_A821:
if (it->options[
3] ==
1)
s->range_table = &range_unipolar10;
else
s->range_table = &range_unipolar5;
break;
case BOARD_PCL812:
case BOARD_ACL8112:
case BOARD_PCL812PG:
case BOARD_ACL8216:
switch (it->options[
5]) {
case 1:
s->range_table = &range_unipolar10;
break;
case 2:
s->range_table = &range_unknown;
break;
default:
s->range_table = &range_unipolar5;
break;
}
break;
default:
s->range_table = &range_unipolar5;
break;
}
s->insn_write = pcl812_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
subdev++;
}
if (board->has_dio) {
/* Digital Input subdevice */
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan =
16;
s->maxdata =
1;
s->range_table = &range_digital;
s->insn_bits = pcl812_di_insn_bits;
subdev++;
/* Digital Output subdevice */
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan =
16;
s->maxdata =
1;
s->range_table = &range_digital;
s->insn_bits = pcl812_do_insn_bits;
subdev++;
}
switch (board->board_type) {
case BOARD_ACL8216:
case BOARD_PCL812PG:
case BOARD_PCL812:
case BOARD_ACL8112:
devpriv->max_812_ai_mode0_rangewait =
1;
if (it->options[
3] >
0)
/* we use external trigger */
devpriv->use_ext_trg =
1;
break;
case BOARD_A821:
devpriv->max_812_ai_mode0_rangewait =
1;
devpriv->mode_reg_int = (dev->irq <<
4) &
0xf0;
break;
case BOARD_PCL813B:
case BOARD_PCL813:
case BOARD_ISO813:
case BOARD_ACL8113:
/* maybe there must by greatest timeout */
devpriv->max_812_ai_mode0_rangewait =
5;
break;
}
pcl812_reset(dev);
return 0;
}
static void pcl812_detach(
struct comedi_device *dev)
{
pcl812_free_dma(dev);
comedi_legacy_detach(dev);
}
static struct comedi_driver pcl812_driver = {
.driver_name =
"pcl812",
.module = THIS_MODULE,
.attach = pcl812_attach,
.detach = pcl812_detach,
.board_name = &boardtypes[
0].name,
.num_names = ARRAY_SIZE(boardtypes),
.offset =
sizeof(
struct pcl812_board),
};
module_comedi_driver(pcl812_driver);
MODULE_AUTHOR(
"Comedi https://www.comedi.org");
MODULE_DESCRIPTION(
"Comedi low-level driver");
MODULE_LICENSE(
"GPL");