diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/ni_at_a2150.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_at_a2150.c | 782 |
1 files changed, 0 insertions, 782 deletions
diff --git a/drivers/staging/comedi/drivers/ni_at_a2150.c b/drivers/staging/comedi/drivers/ni_at_a2150.c deleted file mode 100644 index 10ad7b88713e..000000000000 --- a/drivers/staging/comedi/drivers/ni_at_a2150.c +++ /dev/null @@ -1,782 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Comedi driver for National Instruments AT-A2150 boards - * Copyright (C) 2001, 2002 Frank Mori Hess <fmhess@users.sourceforge.net> - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 2000 David A. Schleef <ds@schleef.org> - */ - -/* - * Driver: ni_at_a2150 - * Description: National Instruments AT-A2150 - * Author: Frank Mori Hess - * Status: works - * Devices: [National Instruments] AT-A2150C (at_a2150c), AT-2150S (at_a2150s) - * - * Configuration options: - * [0] - I/O port base address - * [1] - IRQ (optional, required for timed conversions) - * [2] - DMA (optional, required for timed conversions) - * - * Yet another driver for obsolete hardware brought to you by Frank Hess. - * Testing and debugging help provided by Dave Andruczyk. - * - * If you want to ac couple the board's inputs, use AREF_OTHER. - * - * The only difference in the boards is their master clock frequencies. - * - * References (from ftp://ftp.natinst.com/support/manuals): - * 320360.pdf AT-A2150 User Manual - * - * TODO: - * - analog level triggering - * - TRIG_WAKE_EOS - */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/slab.h> -#include <linux/io.h> - -#include "../comedidev.h" - -#include "comedi_isadma.h" -#include "comedi_8254.h" - -#define A2150_DMA_BUFFER_SIZE 0xff00 /* size in bytes of dma buffer */ - -/* Registers and bits */ -#define CONFIG_REG 0x0 -#define CHANNEL_BITS(x) ((x) & 0x7) -#define CHANNEL_MASK 0x7 -#define CLOCK_SELECT_BITS(x) (((x) & 0x3) << 3) -#define CLOCK_DIVISOR_BITS(x) (((x) & 0x3) << 5) -#define CLOCK_MASK (0xf << 3) -/* enable (don't internally ground) channels 0 and 1 */ -#define ENABLE0_BIT 0x80 -/* enable (don't internally ground) channels 2 and 3 */ -#define ENABLE1_BIT 0x100 -#define AC0_BIT 0x200 /* ac couple channels 0,1 */ -#define AC1_BIT 0x400 /* ac couple channels 2,3 */ -#define APD_BIT 0x800 /* analog power down */ -#define DPD_BIT 0x1000 /* digital power down */ -#define TRIGGER_REG 0x2 /* trigger config register */ -#define POST_TRIGGER_BITS 0x2 -#define DELAY_TRIGGER_BITS 0x3 -#define HW_TRIG_EN 0x10 /* enable hardware trigger */ -#define FIFO_START_REG 0x6 /* software start aquistion trigger */ -#define FIFO_RESET_REG 0x8 /* clears fifo + fifo flags */ -#define FIFO_DATA_REG 0xa /* read data */ -#define DMA_TC_CLEAR_REG 0xe /* clear dma terminal count interrupt */ -#define STATUS_REG 0x12 /* read only */ -#define FNE_BIT 0x1 /* fifo not empty */ -#define OVFL_BIT 0x8 /* fifo overflow */ -#define EDAQ_BIT 0x10 /* end of acquisition interrupt */ -#define DCAL_BIT 0x20 /* offset calibration in progress */ -#define INTR_BIT 0x40 /* interrupt has occurred */ -/* dma terminal count interrupt has occurred */ -#define DMA_TC_BIT 0x80 -#define ID_BITS(x) (((x) >> 8) & 0x3) -#define IRQ_DMA_CNTRL_REG 0x12 /* write only */ -#define DMA_CHAN_BITS(x) ((x) & 0x7) /* sets dma channel */ -#define DMA_EN_BIT 0x8 /* enables dma */ -#define IRQ_LVL_BITS(x) (((x) & 0xf) << 4) /* sets irq level */ -#define FIFO_INTR_EN_BIT 0x100 /* enable fifo interrupts */ -#define FIFO_INTR_FHF_BIT 0x200 /* interrupt fifo half full */ -/* enable interrupt on dma terminal count */ -#define DMA_INTR_EN_BIT 0x800 -#define DMA_DEM_EN_BIT 0x1000 /* enables demand mode dma */ -#define I8253_BASE_REG 0x14 - -struct a2150_board { - const char *name; - int clock[4]; /* master clock periods, in nanoseconds */ - int num_clocks; /* number of available master clock speeds */ - int ai_speed; /* maximum conversion rate in nanoseconds */ -}; - -/* analog input range */ -static const struct comedi_lrange range_a2150 = { - 1, { - BIP_RANGE(2.828) - } -}; - -/* enum must match board indices */ -enum { a2150_c, a2150_s }; -static const struct a2150_board a2150_boards[] = { - { - .name = "at-a2150c", - .clock = {31250, 22676, 20833, 19531}, - .num_clocks = 4, - .ai_speed = 19531, - }, - { - .name = "at-a2150s", - .clock = {62500, 50000, 41667, 0}, - .num_clocks = 3, - .ai_speed = 41667, - }, -}; - -struct a2150_private { - struct comedi_isadma *dma; - unsigned int count; /* number of data points left to be taken */ - int irq_dma_bits; /* irq/dma register bits */ - int config_bits; /* config register bits */ -}; - -/* interrupt service routine */ -static irqreturn_t a2150_interrupt(int irq, void *d) -{ - struct comedi_device *dev = d; - struct a2150_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[0]; - struct comedi_subdevice *s = dev->read_subdev; - struct comedi_async *async = s->async; - struct comedi_cmd *cmd = &async->cmd; - unsigned short *buf = desc->virt_addr; - unsigned int max_points, num_points, residue, leftover; - unsigned short dpnt; - int status; - int i; - - if (!dev->attached) - return IRQ_HANDLED; - - status = inw(dev->iobase + STATUS_REG); - if ((status & INTR_BIT) == 0) - return IRQ_NONE; - - if (status & OVFL_BIT) { - async->events |= COMEDI_CB_ERROR; - comedi_handle_events(dev, s); - } - - if ((status & DMA_TC_BIT) == 0) { - async->events |= COMEDI_CB_ERROR; - comedi_handle_events(dev, s); - return IRQ_HANDLED; - } - - /* - * residue is the number of bytes left to be done on the dma - * transfer. It should always be zero at this point unless - * the stop_src is set to external triggering. - */ - residue = comedi_isadma_disable(desc->chan); - - /* figure out how many points to read */ - max_points = comedi_bytes_to_samples(s, desc->size); - num_points = max_points - comedi_bytes_to_samples(s, residue); - if (devpriv->count < num_points && cmd->stop_src == TRIG_COUNT) - num_points = devpriv->count; - - /* figure out how many points will be stored next time */ - leftover = 0; - if (cmd->stop_src == TRIG_NONE) { - leftover = comedi_bytes_to_samples(s, desc->size); - } else if (devpriv->count > max_points) { - leftover = devpriv->count - max_points; - if (leftover > max_points) - leftover = max_points; - } - /* - * There should only be a residue if collection was stopped by having - * the stop_src set to an external trigger, in which case there - * will be no more data - */ - if (residue) - leftover = 0; - - for (i = 0; i < num_points; i++) { - /* write data point to comedi buffer */ - dpnt = buf[i]; - /* convert from 2's complement to unsigned coding */ - dpnt ^= 0x8000; - comedi_buf_write_samples(s, &dpnt, 1); - if (cmd->stop_src == TRIG_COUNT) { - if (--devpriv->count == 0) { /* end of acquisition */ - async->events |= COMEDI_CB_EOA; - break; - } - } - } - /* re-enable dma */ - if (leftover) { - desc->size = comedi_samples_to_bytes(s, leftover); - comedi_isadma_program(desc); - } - - comedi_handle_events(dev, s); - - /* clear interrupt */ - outw(0x00, dev->iobase + DMA_TC_CLEAR_REG); - - return IRQ_HANDLED; -} - -static int a2150_cancel(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct a2150_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[0]; - - /* disable dma on card */ - devpriv->irq_dma_bits &= ~DMA_INTR_EN_BIT & ~DMA_EN_BIT; - outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); - - /* disable computer's dma */ - comedi_isadma_disable(desc->chan); - - /* clear fifo and reset triggering circuitry */ - outw(0, dev->iobase + FIFO_RESET_REG); - - return 0; -} - -/* - * sets bits in devpriv->clock_bits to nearest approximation of requested - * period, adjusts requested period to actual timing. - */ -static int a2150_get_timing(struct comedi_device *dev, unsigned int *period, - unsigned int flags) -{ - const struct a2150_board *board = dev->board_ptr; - struct a2150_private *devpriv = dev->private; - int lub, glb, temp; - int lub_divisor_shift, lub_index, glb_divisor_shift, glb_index; - int i, j; - - /* initialize greatest lower and least upper bounds */ - lub_divisor_shift = 3; - lub_index = 0; - lub = board->clock[lub_index] * (1 << lub_divisor_shift); - glb_divisor_shift = 0; - glb_index = board->num_clocks - 1; - glb = board->clock[glb_index] * (1 << glb_divisor_shift); - - /* make sure period is in available range */ - if (*period < glb) - *period = glb; - if (*period > lub) - *period = lub; - - /* we can multiply period by 1, 2, 4, or 8, using (1 << i) */ - for (i = 0; i < 4; i++) { - /* there are a maximum of 4 master clocks */ - for (j = 0; j < board->num_clocks; j++) { - /* temp is the period in nanosec we are evaluating */ - temp = board->clock[j] * (1 << i); - /* if it is the best match yet */ - if (temp < lub && temp >= *period) { - lub_divisor_shift = i; - lub_index = j; - lub = temp; - } - if (temp > glb && temp <= *period) { - glb_divisor_shift = i; - glb_index = j; - glb = temp; - } - } - } - switch (flags & CMDF_ROUND_MASK) { - case CMDF_ROUND_NEAREST: - default: - /* if least upper bound is better approximation */ - if (lub - *period < *period - glb) - *period = lub; - else - *period = glb; - break; - case CMDF_ROUND_UP: - *period = lub; - break; - case CMDF_ROUND_DOWN: - *period = glb; - break; - } - - /* set clock bits for config register appropriately */ - devpriv->config_bits &= ~CLOCK_MASK; - if (*period == lub) { - devpriv->config_bits |= - CLOCK_SELECT_BITS(lub_index) | - CLOCK_DIVISOR_BITS(lub_divisor_shift); - } else { - devpriv->config_bits |= - CLOCK_SELECT_BITS(glb_index) | - CLOCK_DIVISOR_BITS(glb_divisor_shift); - } - - return 0; -} - -static int a2150_set_chanlist(struct comedi_device *dev, - unsigned int start_channel, - unsigned int num_channels) -{ - struct a2150_private *devpriv = dev->private; - - if (start_channel + num_channels > 4) - return -1; - - devpriv->config_bits &= ~CHANNEL_MASK; - - switch (num_channels) { - case 1: - devpriv->config_bits |= CHANNEL_BITS(0x4 | start_channel); - break; - case 2: - if (start_channel == 0) - devpriv->config_bits |= CHANNEL_BITS(0x2); - else if (start_channel == 2) - devpriv->config_bits |= CHANNEL_BITS(0x3); - else - return -1; - break; - case 4: - devpriv->config_bits |= CHANNEL_BITS(0x1); - break; - default: - return -1; - } - - return 0; -} - -static int a2150_ai_check_chanlist(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); - unsigned int aref0 = CR_AREF(cmd->chanlist[0]); - int i; - - if (cmd->chanlist_len == 2 && (chan0 == 1 || chan0 == 3)) { - dev_dbg(dev->class_dev, - "length 2 chanlist must be channels 0,1 or channels 2,3\n"); - return -EINVAL; - } - - if (cmd->chanlist_len == 3) { - dev_dbg(dev->class_dev, - "chanlist must have 1,2 or 4 channels\n"); - return -EINVAL; - } - - for (i = 1; i < cmd->chanlist_len; i++) { - unsigned int chan = CR_CHAN(cmd->chanlist[i]); - unsigned int aref = CR_AREF(cmd->chanlist[i]); - - if (chan != (chan0 + i)) { - dev_dbg(dev->class_dev, - "entries in chanlist must be consecutive channels, counting upwards\n"); - return -EINVAL; - } - - if (chan == 2) - aref0 = aref; - if (aref != aref0) { - dev_dbg(dev->class_dev, - "channels 0/1 and 2/3 must have the same analog reference\n"); - return -EINVAL; - } - } - - return 0; -} - -static int a2150_ai_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, struct comedi_cmd *cmd) -{ - const struct a2150_board *board = dev->board_ptr; - int err = 0; - unsigned int arg; - - /* Step 1 : check if triggers are trivially valid */ - - err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT); - err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER); - err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW); - 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->start_src); - 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); - - if (cmd->convert_src == TRIG_TIMER) { - err |= comedi_check_trigger_arg_min(&cmd->convert_arg, - board->ai_speed); - } - - 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->scan_begin_src == TRIG_TIMER) { - arg = cmd->scan_begin_arg; - a2150_get_timing(dev, &arg, cmd->flags); - err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg); - } - - if (err) - return 4; - - /* Step 5: check channel list if it exists */ - if (cmd->chanlist && cmd->chanlist_len > 0) - err |= a2150_ai_check_chanlist(dev, s, cmd); - - if (err) - return 5; - - return 0; -} - -static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) -{ - struct a2150_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[0]; - struct comedi_async *async = s->async; - struct comedi_cmd *cmd = &async->cmd; - unsigned int old_config_bits = devpriv->config_bits; - unsigned int trigger_bits; - - if (cmd->flags & CMDF_PRIORITY) { - dev_err(dev->class_dev, - "dma incompatible with hard real-time interrupt (CMDF_PRIORITY), aborting\n"); - return -1; - } - /* clear fifo and reset triggering circuitry */ - outw(0, dev->iobase + FIFO_RESET_REG); - - /* setup chanlist */ - if (a2150_set_chanlist(dev, CR_CHAN(cmd->chanlist[0]), - cmd->chanlist_len) < 0) - return -1; - - /* setup ac/dc coupling */ - if (CR_AREF(cmd->chanlist[0]) == AREF_OTHER) - devpriv->config_bits |= AC0_BIT; - else - devpriv->config_bits &= ~AC0_BIT; - if (CR_AREF(cmd->chanlist[2]) == AREF_OTHER) - devpriv->config_bits |= AC1_BIT; - else - devpriv->config_bits &= ~AC1_BIT; - - /* setup timing */ - a2150_get_timing(dev, &cmd->scan_begin_arg, cmd->flags); - - /* send timing, channel, config bits */ - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - - /* initialize number of samples remaining */ - devpriv->count = cmd->stop_arg * cmd->chanlist_len; - - comedi_isadma_disable(desc->chan); - - /* set size of transfer to fill in 1/3 second */ -#define ONE_THIRD_SECOND 333333333 - desc->size = comedi_bytes_per_sample(s) * cmd->chanlist_len * - ONE_THIRD_SECOND / cmd->scan_begin_arg; - if (desc->size > desc->maxsize) - desc->size = desc->maxsize; - if (desc->size < comedi_bytes_per_sample(s)) - desc->size = comedi_bytes_per_sample(s); - desc->size -= desc->size % comedi_bytes_per_sample(s); - - comedi_isadma_program(desc); - - /* - * Clear dma interrupt before enabling it, to try and get rid of - * that one spurious interrupt that has been happening. - */ - outw(0x00, dev->iobase + DMA_TC_CLEAR_REG); - - /* enable dma on card */ - devpriv->irq_dma_bits |= DMA_INTR_EN_BIT | DMA_EN_BIT; - outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); - - /* may need to wait 72 sampling periods if timing was changed */ - comedi_8254_load(dev->pacer, 2, 72, I8254_MODE0 | I8254_BINARY); - - /* setup start triggering */ - trigger_bits = 0; - /* decide if we need to wait 72 periods for valid data */ - if (cmd->start_src == TRIG_NOW && - (old_config_bits & CLOCK_MASK) != - (devpriv->config_bits & CLOCK_MASK)) { - /* set trigger source to delay trigger */ - trigger_bits |= DELAY_TRIGGER_BITS; - } else { - /* otherwise no delay */ - trigger_bits |= POST_TRIGGER_BITS; - } - /* enable external hardware trigger */ - if (cmd->start_src == TRIG_EXT) { - trigger_bits |= HW_TRIG_EN; - } else if (cmd->start_src == TRIG_OTHER) { - /* - * XXX add support for level/slope start trigger - * using TRIG_OTHER - */ - dev_err(dev->class_dev, "you shouldn't see this?\n"); - } - /* send trigger config bits */ - outw(trigger_bits, dev->iobase + TRIGGER_REG); - - /* start acquisition for soft trigger */ - if (cmd->start_src == TRIG_NOW) - outw(0, dev->iobase + FIFO_START_REG); - - return 0; -} - -static int a2150_ai_eoc(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned int status; - - status = inw(dev->iobase + STATUS_REG); - if (status & FNE_BIT) - return 0; - return -EBUSY; -} - -static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data) -{ - struct a2150_private *devpriv = dev->private; - unsigned int n; - int ret; - - /* clear fifo and reset triggering circuitry */ - outw(0, dev->iobase + FIFO_RESET_REG); - - /* setup chanlist */ - if (a2150_set_chanlist(dev, CR_CHAN(insn->chanspec), 1) < 0) - return -1; - - /* set dc coupling */ - devpriv->config_bits &= ~AC0_BIT; - devpriv->config_bits &= ~AC1_BIT; - - /* send timing, channel, config bits */ - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - - /* disable dma on card */ - devpriv->irq_dma_bits &= ~DMA_INTR_EN_BIT & ~DMA_EN_BIT; - outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); - - /* setup start triggering */ - outw(0, dev->iobase + TRIGGER_REG); - - /* start acquisition for soft trigger */ - outw(0, dev->iobase + FIFO_START_REG); - - /* - * there is a 35.6 sample delay for data to get through the - * antialias filter - */ - for (n = 0; n < 36; n++) { - ret = comedi_timeout(dev, s, insn, a2150_ai_eoc, 0); - if (ret) - return ret; - - inw(dev->iobase + FIFO_DATA_REG); - } - - /* read data */ - for (n = 0; n < insn->n; n++) { - ret = comedi_timeout(dev, s, insn, a2150_ai_eoc, 0); - if (ret) - return ret; - - data[n] = inw(dev->iobase + FIFO_DATA_REG); - data[n] ^= 0x8000; - } - - /* clear fifo and reset triggering circuitry */ - outw(0, dev->iobase + FIFO_RESET_REG); - - return n; -} - -static void a2150_alloc_irq_and_dma(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct a2150_private *devpriv = dev->private; - unsigned int irq_num = it->options[1]; - unsigned int dma_chan = it->options[2]; - - /* - * Only IRQs 15, 14, 12-9, and 7-3 are valid. - * Only DMA channels 7-5 and 3-0 are valid. - */ - if (irq_num > 15 || dma_chan > 7 || - !((1 << irq_num) & 0xdef8) || !((1 << dma_chan) & 0xef)) - return; - - if (request_irq(irq_num, a2150_interrupt, 0, dev->board_name, dev)) - return; - - /* DMA uses 1 buffer */ - devpriv->dma = comedi_isadma_alloc(dev, 1, dma_chan, dma_chan, - A2150_DMA_BUFFER_SIZE, - COMEDI_ISADMA_READ); - if (!devpriv->dma) { - free_irq(irq_num, dev); - } else { - dev->irq = irq_num; - devpriv->irq_dma_bits = IRQ_LVL_BITS(irq_num) | - DMA_CHAN_BITS(dma_chan); - } -} - -static void a2150_free_dma(struct comedi_device *dev) -{ - struct a2150_private *devpriv = dev->private; - - if (devpriv) - comedi_isadma_free(devpriv->dma); -} - -static const struct a2150_board *a2150_probe(struct comedi_device *dev) -{ - int id = ID_BITS(inw(dev->iobase + STATUS_REG)); - - if (id >= ARRAY_SIZE(a2150_boards)) - return NULL; - - return &a2150_boards[id]; -} - -static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it) -{ - const struct a2150_board *board; - struct a2150_private *devpriv; - struct comedi_subdevice *s; - static const int timeout = 2000; - int i; - int ret; - - devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); - if (!devpriv) - return -ENOMEM; - - ret = comedi_request_region(dev, it->options[0], 0x1c); - if (ret) - return ret; - - board = a2150_probe(dev); - if (!board) - return -ENODEV; - dev->board_ptr = board; - dev->board_name = board->name; - - /* an IRQ and DMA are required to support async commands */ - a2150_alloc_irq_and_dma(dev, it); - - dev->pacer = comedi_8254_init(dev->iobase + I8253_BASE_REG, - 0, I8254_IO8, 0); - if (!dev->pacer) - return -ENOMEM; - - ret = comedi_alloc_subdevices(dev, 1); - if (ret) - return ret; - - /* analog input subdevice */ - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_OTHER; - s->n_chan = 4; - s->maxdata = 0xffff; - s->range_table = &range_a2150; - s->insn_read = a2150_ai_rinsn; - if (dev->irq) { - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ; - s->len_chanlist = s->n_chan; - s->do_cmd = a2150_ai_cmd; - s->do_cmdtest = a2150_ai_cmdtest; - s->cancel = a2150_cancel; - } - - /* set card's irq and dma levels */ - outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); - - /* reset and sync adc clock circuitry */ - outw_p(DPD_BIT | APD_BIT, dev->iobase + CONFIG_REG); - outw_p(DPD_BIT, dev->iobase + CONFIG_REG); - /* initialize configuration register */ - devpriv->config_bits = 0; - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - /* wait until offset calibration is done, then enable analog inputs */ - for (i = 0; i < timeout; i++) { - if ((DCAL_BIT & inw(dev->iobase + STATUS_REG)) == 0) - break; - usleep_range(1000, 3000); - } - if (i == timeout) { - dev_err(dev->class_dev, - "timed out waiting for offset calibration to complete\n"); - return -ETIME; - } - devpriv->config_bits |= ENABLE0_BIT | ENABLE1_BIT; - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - - return 0; -}; - -static void a2150_detach(struct comedi_device *dev) -{ - if (dev->iobase) - outw(APD_BIT | DPD_BIT, dev->iobase + CONFIG_REG); - a2150_free_dma(dev); - comedi_legacy_detach(dev); -}; - -static struct comedi_driver ni_at_a2150_driver = { - .driver_name = "ni_at_a2150", - .module = THIS_MODULE, - .attach = a2150_attach, - .detach = a2150_detach, -}; -module_comedi_driver(ni_at_a2150_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi low-level driver"); -MODULE_LICENSE("GPL"); |