| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * pcl816.c |
| * Comedi driver for Advantech PCL-816 cards |
| * |
| * Author: Juan Grigera <juan@grigera.com.ar> |
| * based on pcl818 by Michal Dobes <dobes@tesnet.cz> and bits of pcl812 |
| */ |
| |
| /* |
| * Driver: pcl816 |
| * Description: Advantech PCL-816 cards, PCL-814 |
| * Devices: [Advantech] PCL-816 (pcl816), PCL-814B (pcl814b) |
| * Author: Juan Grigera <juan@grigera.com.ar> |
| * Status: works |
| * Updated: Tue, 2 Apr 2002 23:15:21 -0800 |
| * |
| * PCL 816 and 814B have 16 SE/DIFF ADCs, 16 DACs, 16 DI and 16 DO. |
| * Differences are at resolution (16 vs 12 bits). |
| * |
| * The driver support AI command mode, other subdevices not written. |
| * |
| * Analog output and digital input and output are not supported. |
| * |
| * Configuration Options: |
| * [0] - IO Base |
| * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7) |
| * [2] - DMA (0=disable, 1, 3) |
| * [3] - 0, 10=10MHz clock for 8254 |
| * 1= 1MHz clock for 8254 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/gfp.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| |
| #include "../comedidev.h" |
| |
| #include "comedi_isadma.h" |
| #include "comedi_8254.h" |
| |
| /* |
| * Register I/O map |
| */ |
| #define PCL816_DO_DI_LSB_REG 0x00 |
| #define PCL816_DO_DI_MSB_REG 0x01 |
| #define PCL816_TIMER_BASE 0x04 |
| #define PCL816_AI_LSB_REG 0x08 |
| #define PCL816_AI_MSB_REG 0x09 |
| #define PCL816_RANGE_REG 0x09 |
| #define PCL816_CLRINT_REG 0x0a |
| #define PCL816_MUX_REG 0x0b |
| #define PCL816_MUX_SCAN(_first, _last) (((_last) << 4) | (_first)) |
| #define PCL816_CTRL_REG 0x0c |
| #define PCL816_CTRL_SOFT_TRIG BIT(0) |
| #define PCL816_CTRL_PACER_TRIG BIT(1) |
| #define PCL816_CTRL_EXT_TRIG BIT(2) |
| #define PCL816_CTRL_POE BIT(3) |
| #define PCL816_CTRL_DMAEN BIT(4) |
| #define PCL816_CTRL_INTEN BIT(5) |
| #define PCL816_CTRL_DMASRC_SLOT(x) (((x) & 0x3) << 6) |
| #define PCL816_STATUS_REG 0x0d |
| #define PCL816_STATUS_NEXT_CHAN_MASK (0xf << 0) |
| #define PCL816_STATUS_INTSRC_SLOT(x) (((x) & 0x3) << 4) |
| #define PCL816_STATUS_INTSRC_DMA PCL816_STATUS_INTSRC_SLOT(3) |
| #define PCL816_STATUS_INTSRC_MASK PCL816_STATUS_INTSRC_SLOT(3) |
| #define PCL816_STATUS_INTACT BIT(6) |
| #define PCL816_STATUS_DRDY BIT(7) |
| |
| #define MAGIC_DMA_WORD 0x5a5a |
| |
| static const struct comedi_lrange range_pcl816 = { |
| 8, { |
| BIP_RANGE(10), |
| BIP_RANGE(5), |
| BIP_RANGE(2.5), |
| BIP_RANGE(1.25), |
| UNI_RANGE(10), |
| UNI_RANGE(5), |
| UNI_RANGE(2.5), |
| UNI_RANGE(1.25) |
| } |
| }; |
| |
| struct pcl816_board { |
| const char *name; |
| int ai_maxdata; |
| int ai_chanlist; |
| }; |
| |
| static const struct pcl816_board boardtypes[] = { |
| { |
| .name = "pcl816", |
| .ai_maxdata = 0xffff, |
| .ai_chanlist = 1024, |
| }, { |
| .name = "pcl814b", |
| .ai_maxdata = 0x3fff, |
| .ai_chanlist = 1024, |
| }, |
| }; |
| |
| struct pcl816_private { |
| struct comedi_isadma *dma; |
| unsigned int ai_poll_ptr; /* how many sampes transfer poll */ |
| unsigned int ai_cmd_running:1; |
| unsigned int ai_cmd_canceled:1; |
| }; |
| |
| static void pcl816_ai_setup_dma(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| unsigned int unread_samples) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_isadma *dma = devpriv->dma; |
| struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; |
| unsigned int max_samples = comedi_bytes_to_samples(s, desc->maxsize); |
| unsigned int nsamples; |
| |
| comedi_isadma_disable(dma->chan); |
| |
| /* |
| * Determine dma size based on the buffer maxsize 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 pcl816_ai_set_chan_range(struct comedi_device *dev, |
| unsigned int chan, |
| unsigned int range) |
| { |
| outb(chan, dev->iobase + PCL816_MUX_REG); |
| outb(range, dev->iobase + PCL816_RANGE_REG); |
| } |
| |
| static void pcl816_ai_set_chan_scan(struct comedi_device *dev, |
| unsigned int first_chan, |
| unsigned int last_chan) |
| { |
| outb(PCL816_MUX_SCAN(first_chan, last_chan), |
| dev->iobase + PCL816_MUX_REG); |
| } |
| |
| static void pcl816_ai_setup_chanlist(struct comedi_device *dev, |
| unsigned int *chanlist, |
| unsigned int seglen) |
| { |
| unsigned int first_chan = CR_CHAN(chanlist[0]); |
| unsigned int last_chan; |
| unsigned int range; |
| unsigned int i; |
| |
| /* store range list to card */ |
| for (i = 0; i < seglen; i++) { |
| last_chan = CR_CHAN(chanlist[i]); |
| range = CR_RANGE(chanlist[i]); |
| |
| pcl816_ai_set_chan_range(dev, last_chan, range); |
| } |
| |
| udelay(1); |
| |
| pcl816_ai_set_chan_scan(dev, first_chan, last_chan); |
| } |
| |
| static void pcl816_ai_clear_eoc(struct comedi_device *dev) |
| { |
| /* writing any value clears the interrupt request */ |
| outb(0, dev->iobase + PCL816_CLRINT_REG); |
| } |
| |
| static void pcl816_ai_soft_trig(struct comedi_device *dev) |
| { |
| /* writing any value triggers a software conversion */ |
| outb(0, dev->iobase + PCL816_AI_LSB_REG); |
| } |
| |
| static unsigned int pcl816_ai_get_sample(struct comedi_device *dev, |
| struct comedi_subdevice *s) |
| { |
| unsigned int val; |
| |
| val = inb(dev->iobase + PCL816_AI_MSB_REG) << 8; |
| val |= inb(dev->iobase + PCL816_AI_LSB_REG); |
| |
| return val & s->maxdata; |
| } |
| |
| static int pcl816_ai_eoc(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, |
| unsigned long context) |
| { |
| unsigned int status; |
| |
| status = inb(dev->iobase + PCL816_STATUS_REG); |
| if ((status & PCL816_STATUS_DRDY) == 0) |
| return 0; |
| return -EBUSY; |
| } |
| |
| static bool pcl816_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 transfer_from_dma_buf(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| unsigned short *ptr, |
| unsigned int bufptr, unsigned int len) |
| { |
| unsigned short val; |
| int i; |
| |
| for (i = 0; i < len; i++) { |
| val = ptr[bufptr++]; |
| comedi_buf_write_samples(s, &val, 1); |
| |
| if (!pcl816_ai_next_chan(dev, s)) |
| return; |
| } |
| } |
| |
| static irqreturn_t pcl816_interrupt(int irq, void *d) |
| { |
| struct comedi_device *dev = d; |
| struct comedi_subdevice *s = dev->read_subdev; |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_isadma *dma = devpriv->dma; |
| struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; |
| unsigned int nsamples; |
| unsigned int bufptr; |
| |
| if (!dev->attached || !devpriv->ai_cmd_running) { |
| pcl816_ai_clear_eoc(dev); |
| return IRQ_HANDLED; |
| } |
| |
| if (devpriv->ai_cmd_canceled) { |
| devpriv->ai_cmd_canceled = 0; |
| pcl816_ai_clear_eoc(dev); |
| return IRQ_HANDLED; |
| } |
| |
| 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; |
| pcl816_ai_setup_dma(dev, s, nsamples); |
| |
| transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples); |
| |
| pcl816_ai_clear_eoc(dev); |
| |
| comedi_handle_events(dev, s); |
| return IRQ_HANDLED; |
| } |
| |
| static int check_channel_list(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| unsigned int *chanlist, |
| unsigned int chanlen) |
| { |
| unsigned int chansegment[16]; |
| unsigned int i, nowmustbechan, seglen; |
| |
| /* correct channel and range number check itself comedi/range.c */ |
| if (chanlen < 1) { |
| dev_err(dev->class_dev, "range/channel list is empty!\n"); |
| return 0; |
| } |
| |
| if (chanlen > 1) { |
| /* first channel is every time ok */ |
| chansegment[0] = chanlist[0]; |
| for (i = 1, seglen = 1; i < chanlen; i++, seglen++) { |
| /* we detect loop, this must by finish */ |
| if (chanlist[0] == chanlist[i]) |
| break; |
| nowmustbechan = |
| (CR_CHAN(chansegment[i - 1]) + 1) % chanlen; |
| if (nowmustbechan != CR_CHAN(chanlist[i])) { |
| /* channel list isn't continuous :-( */ |
| dev_dbg(dev->class_dev, |
| "channel list must be continuous! chanlist[%i]=%d but must be %d or %d!\n", |
| i, CR_CHAN(chanlist[i]), nowmustbechan, |
| CR_CHAN(chanlist[0])); |
| return 0; |
| } |
| /* well, this is next correct channel in list */ |
| chansegment[i] = chanlist[i]; |
| } |
| |
| /* check whole chanlist */ |
| for (i = 0; i < chanlen; i++) { |
| if (chanlist[i] != chansegment[i % seglen]) { |
| dev_dbg(dev->class_dev, |
| "bad channel or range number! chanlist[%i]=%d,%d,%d and not %d,%d,%d!\n", |
| i, CR_CHAN(chansegment[i]), |
| CR_RANGE(chansegment[i]), |
| CR_AREF(chansegment[i]), |
| CR_CHAN(chanlist[i % seglen]), |
| CR_RANGE(chanlist[i % seglen]), |
| CR_AREF(chansegment[i % seglen])); |
| return 0; /* chan/gain list is strange */ |
| } |
| } |
| } else { |
| seglen = 1; |
| } |
| |
| return seglen; /* we can serve this with MUX logic */ |
| } |
| |
| static int pcl816_ai_cmdtest(struct comedi_device *dev, |
| struct comedi_subdevice *s, struct comedi_cmd *cmd) |
| { |
| int err = 0; |
| |
| /* 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); |
| err |= comedi_check_trigger_src(&cmd->convert_src, |
| TRIG_EXT | TRIG_TIMER); |
| 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->convert_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); |
| 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, 10000); |
| else /* TRIG_EXT */ |
| err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); |
| |
| 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; |
| |
| /* step 5: complain about special chanlist considerations */ |
| |
| if (cmd->chanlist) { |
| if (!check_channel_list(dev, s, cmd->chanlist, |
| cmd->chanlist_len)) |
| return 5; /* incorrect channels list */ |
| } |
| |
| return 0; |
| } |
| |
| static int pcl816_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_isadma *dma = devpriv->dma; |
| struct comedi_cmd *cmd = &s->async->cmd; |
| unsigned int ctrl; |
| unsigned int seglen; |
| |
| if (devpriv->ai_cmd_running) |
| return -EBUSY; |
| |
| seglen = check_channel_list(dev, s, cmd->chanlist, cmd->chanlist_len); |
| if (seglen < 1) |
| return -EINVAL; |
| pcl816_ai_setup_chanlist(dev, cmd->chanlist, seglen); |
| udelay(1); |
| |
| devpriv->ai_cmd_running = 1; |
| devpriv->ai_poll_ptr = 0; |
| devpriv->ai_cmd_canceled = 0; |
| |
| /* setup and enable dma for the first buffer */ |
| dma->cur_dma = 0; |
| pcl816_ai_setup_dma(dev, s, 0); |
| |
| comedi_8254_set_mode(dev->pacer, 0, I8254_MODE1 | I8254_BINARY); |
| comedi_8254_write(dev->pacer, 0, 0x0ff); |
| udelay(1); |
| comedi_8254_update_divisors(dev->pacer); |
| comedi_8254_pacer_enable(dev->pacer, 1, 2, true); |
| |
| ctrl = PCL816_CTRL_INTEN | PCL816_CTRL_DMAEN | |
| PCL816_CTRL_DMASRC_SLOT(0); |
| if (cmd->convert_src == TRIG_TIMER) |
| ctrl |= PCL816_CTRL_PACER_TRIG; |
| else /* TRIG_EXT */ |
| ctrl |= PCL816_CTRL_EXT_TRIG; |
| |
| outb(ctrl, dev->iobase + PCL816_CTRL_REG); |
| outb((dma->chan << 4) | dev->irq, |
| dev->iobase + PCL816_STATUS_REG); |
| |
| return 0; |
| } |
| |
| static int pcl816_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_isadma *dma = devpriv->dma; |
| struct comedi_isadma_desc *desc; |
| unsigned long flags; |
| unsigned int poll; |
| int ret; |
| |
| 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; |
| |
| comedi_handle_events(dev, s); |
| |
| ret = comedi_buf_n_bytes_ready(s); |
| } else { |
| /* no new samples */ |
| ret = 0; |
| } |
| spin_unlock_irqrestore(&dev->spinlock, flags); |
| |
| return ret; |
| } |
| |
| static int pcl816_ai_cancel(struct comedi_device *dev, |
| struct comedi_subdevice *s) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| |
| if (!devpriv->ai_cmd_running) |
| return 0; |
| |
| outb(0, dev->iobase + PCL816_CTRL_REG); |
| pcl816_ai_clear_eoc(dev); |
| |
| comedi_8254_pacer_enable(dev->pacer, 1, 2, false); |
| |
| devpriv->ai_cmd_running = 0; |
| devpriv->ai_cmd_canceled = 1; |
| |
| return 0; |
| } |
| |
| static int pcl816_ai_insn_read(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, |
| unsigned int *data) |
| { |
| unsigned int chan = CR_CHAN(insn->chanspec); |
| unsigned int range = CR_RANGE(insn->chanspec); |
| int ret = 0; |
| int i; |
| |
| outb(PCL816_CTRL_SOFT_TRIG, dev->iobase + PCL816_CTRL_REG); |
| |
| pcl816_ai_set_chan_range(dev, chan, range); |
| pcl816_ai_set_chan_scan(dev, chan, chan); |
| |
| for (i = 0; i < insn->n; i++) { |
| pcl816_ai_clear_eoc(dev); |
| pcl816_ai_soft_trig(dev); |
| |
| ret = comedi_timeout(dev, s, insn, pcl816_ai_eoc, 0); |
| if (ret) |
| break; |
| |
| data[i] = pcl816_ai_get_sample(dev, s); |
| } |
| outb(0, dev->iobase + PCL816_CTRL_REG); |
| pcl816_ai_clear_eoc(dev); |
| |
| return ret ? ret : insn->n; |
| } |
| |
| static int pcl816_di_insn_bits(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, |
| unsigned int *data) |
| { |
| data[1] = inb(dev->iobase + PCL816_DO_DI_LSB_REG) | |
| (inb(dev->iobase + PCL816_DO_DI_MSB_REG) << 8); |
| |
| return insn->n; |
| } |
| |
| static int pcl816_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 + PCL816_DO_DI_LSB_REG); |
| outb((s->state >> 8), dev->iobase + PCL816_DO_DI_MSB_REG); |
| } |
| |
| data[1] = s->state; |
| |
| return insn->n; |
| } |
| |
| static void pcl816_reset(struct comedi_device *dev) |
| { |
| outb(0, dev->iobase + PCL816_CTRL_REG); |
| pcl816_ai_set_chan_range(dev, 0, 0); |
| pcl816_ai_clear_eoc(dev); |
| |
| /* set all digital outputs low */ |
| outb(0, dev->iobase + PCL816_DO_DI_LSB_REG); |
| outb(0, dev->iobase + PCL816_DO_DI_MSB_REG); |
| } |
| |
| static void pcl816_alloc_irq_and_dma(struct comedi_device *dev, |
| struct comedi_devconfig *it) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| unsigned int irq_num = it->options[1]; |
| unsigned int dma_chan = it->options[2]; |
| |
| /* only IRQs 2-7 and DMA channels 3 and 1 are valid */ |
| if (!(irq_num >= 2 && irq_num <= 7) || |
| !(dma_chan == 3 || dma_chan == 1)) |
| return; |
| |
| if (request_irq(irq_num, pcl816_interrupt, 0, dev->board_name, dev)) |
| return; |
| |
| /* DMA uses two 16K buffers */ |
| devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan, |
| PAGE_SIZE * 4, COMEDI_ISADMA_READ); |
| if (!devpriv->dma) |
| free_irq(irq_num, dev); |
| else |
| dev->irq = irq_num; |
| } |
| |
| static void pcl816_free_dma(struct comedi_device *dev) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| |
| if (devpriv) |
| comedi_isadma_free(devpriv->dma); |
| } |
| |
| static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
| { |
| const struct pcl816_board *board = dev->board_ptr; |
| struct pcl816_private *devpriv; |
| struct comedi_subdevice *s; |
| 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; |
| |
| /* an IRQ and DMA are required to support async commands */ |
| pcl816_alloc_irq_and_dma(dev, it); |
| |
| dev->pacer = comedi_8254_init(dev->iobase + PCL816_TIMER_BASE, |
| I8254_OSC_BASE_10MHZ, I8254_IO8, 0); |
| if (!dev->pacer) |
| return -ENOMEM; |
| |
| ret = comedi_alloc_subdevices(dev, 4); |
| if (ret) |
| return ret; |
| |
| s = &dev->subdevices[0]; |
| s->type = COMEDI_SUBD_AI; |
| s->subdev_flags = SDF_CMD_READ | SDF_DIFF; |
| s->n_chan = 16; |
| s->maxdata = board->ai_maxdata; |
| s->range_table = &range_pcl816; |
| s->insn_read = pcl816_ai_insn_read; |
| if (dev->irq) { |
| dev->read_subdev = s; |
| s->subdev_flags |= SDF_CMD_READ; |
| s->len_chanlist = board->ai_chanlist; |
| s->do_cmdtest = pcl816_ai_cmdtest; |
| s->do_cmd = pcl816_ai_cmd; |
| s->poll = pcl816_ai_poll; |
| s->cancel = pcl816_ai_cancel; |
| } |
| |
| /* Piggyback Slot1 subdevice */ |
| s = &dev->subdevices[1]; |
| s->type = COMEDI_SUBD_UNUSED; |
| |
| /* Digital Input subdevice */ |
| s = &dev->subdevices[2]; |
| 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 = pcl816_di_insn_bits; |
| |
| /* Digital Output subdevice */ |
| s = &dev->subdevices[3]; |
| 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 = pcl816_do_insn_bits; |
| |
| pcl816_reset(dev); |
| |
| return 0; |
| } |
| |
| static void pcl816_detach(struct comedi_device *dev) |
| { |
| if (dev->private) { |
| pcl816_ai_cancel(dev, dev->read_subdev); |
| pcl816_reset(dev); |
| } |
| pcl816_free_dma(dev); |
| comedi_legacy_detach(dev); |
| } |
| |
| static struct comedi_driver pcl816_driver = { |
| .driver_name = "pcl816", |
| .module = THIS_MODULE, |
| .attach = pcl816_attach, |
| .detach = pcl816_detach, |
| .board_name = &boardtypes[0].name, |
| .num_names = ARRAY_SIZE(boardtypes), |
| .offset = sizeof(struct pcl816_board), |
| }; |
| module_comedi_driver(pcl816_driver); |
| |
| MODULE_AUTHOR("Comedi https://www.comedi.org"); |
| MODULE_DESCRIPTION("Comedi low-level driver"); |
| MODULE_LICENSE("GPL"); |