| /* |
| comedi/drivers/pcl816.c |
| |
| Author: Juan Grigera <juan@grigera.com.ar> |
| based on pcl818 by Michal Dobes <dobes@tesnet.cz> and bits of pcl812 |
| |
| hardware driver for Advantech cards: |
| card: PCL-816, PCL814B |
| driver: pcl816 |
| */ |
| /* |
| Driver: pcl816 |
| Description: Advantech PCL-816 cards, PCL-814 |
| Author: Juan Grigera <juan@grigera.com.ar> |
| Devices: [Advantech] PCL-816 (pcl816), PCL-814B (pcl814b) |
| 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 "../comedidev.h" |
| |
| #include <linux/gfp.h> |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| #include <asm/dma.h> |
| |
| #include "comedi_fc.h" |
| #include "8253.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_DISABLE_TRIG (0 << 0) |
| #define PCL816_CTRL_SOFT_TRIG (1 << 0) |
| #define PCL816_CTRL_PACER_TRIG (1 << 1) |
| #define PCL816_CTRL_EXT_TRIG (1 << 2) |
| #define PCL816_CTRL_POE (1 << 3) |
| #define PCL816_CTRL_DMAEN (1 << 4) |
| #define PCL816_CTRL_INTEN (1 << 5) |
| #define PCL816_CTRL_DMASRC_SLOT0 (0 << 6) |
| #define PCL816_CTRL_DMASRC_SLOT1 (1 << 6) |
| #define PCL816_CTRL_DMASRC_SLOT2 (2 << 6) |
| #define PCL816_STATUS_REG 0x0d |
| #define PCL816_STATUS_NEXT_CHAN_MASK (0xf << 0) |
| #define PCL816_STATUS_INTSRC_MASK (3 << 4) |
| #define PCL816_STATUS_INTSRC_SLOT0 (0 << 4) |
| #define PCL816_STATUS_INTSRC_SLOT1 (1 << 4) |
| #define PCL816_STATUS_INTSRC_SLOT2 (2 << 4) |
| #define PCL816_STATUS_INTSRC_DMA (3 << 4) |
| #define PCL816_STATUS_INTACT (1 << 6) |
| #define PCL816_STATUS_DRDY (1 << 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 ao_maxdata; |
| int ai_chanlist; |
| }; |
| |
| static const struct pcl816_board boardtypes[] = { |
| { |
| .name = "pcl816", |
| .ai_maxdata = 0xffff, |
| .ao_maxdata = 0xffff, |
| .ai_chanlist = 1024, |
| }, { |
| .name = "pcl814b", |
| .ai_maxdata = 0x3fff, |
| .ao_maxdata = 0x3fff, |
| .ai_chanlist = 1024, |
| }, |
| }; |
| |
| struct pcl816_private { |
| unsigned int dma; /* used DMA, 0=don't use DMA */ |
| unsigned int dmapages; |
| unsigned int hwdmasize; |
| unsigned long dmabuf[2]; /* pointers to begin of DMA buffers */ |
| unsigned int hwdmaptr[2]; /* hardware address of DMA buffers */ |
| int next_dma_buf; /* which DMA buffer will be used next round */ |
| long dma_runs_to_end; /* how many we must permorm DMA transfer to end of record */ |
| unsigned long last_dma_run; /* how many bytes we must transfer on last DMA page */ |
| int ai_act_scan; /* how many scans we finished */ |
| unsigned int ai_poll_ptr; /* how many sampes transfer poll */ |
| unsigned int divisor1; |
| unsigned int divisor2; |
| unsigned int ai_cmd_running:1; |
| unsigned int ai_cmd_canceled:1; |
| }; |
| |
| static int check_channel_list(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| unsigned int *chanlist, unsigned int chanlen); |
| |
| static void pcl816_start_pacer(struct comedi_device *dev, bool load_counters) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| unsigned long timer_base = dev->iobase + PCL816_TIMER_BASE; |
| |
| i8254_set_mode(timer_base, 0, 0, I8254_MODE1 | I8254_BINARY); |
| i8254_write(timer_base, 0, 0, 0x00ff); |
| udelay(1); |
| |
| i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY); |
| i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY); |
| udelay(1); |
| |
| if (load_counters) { |
| i8254_write(timer_base, 0, 2, devpriv->divisor2); |
| i8254_write(timer_base, 0, 1, devpriv->divisor1); |
| } |
| } |
| |
| static void pcl816_ai_setup_dma(struct comedi_device *dev, |
| struct comedi_subdevice *s) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_cmd *cmd = &s->async->cmd; |
| unsigned int dma_flags; |
| unsigned int bytes; |
| |
| bytes = devpriv->hwdmasize; |
| if (cmd->stop_src == TRIG_COUNT) { |
| /* how many */ |
| bytes = s->async->cmd.chanlist_len * |
| s->async->cmd.chanlist_len * |
| sizeof(short); |
| |
| /* how many DMA pages we must fill */ |
| devpriv->dma_runs_to_end = bytes / devpriv->hwdmasize; |
| |
| /* on last dma transfer must be moved */ |
| devpriv->last_dma_run = bytes % devpriv->hwdmasize; |
| devpriv->dma_runs_to_end--; |
| if (devpriv->dma_runs_to_end >= 0) |
| bytes = devpriv->hwdmasize; |
| } else |
| devpriv->dma_runs_to_end = -1; |
| |
| devpriv->next_dma_buf = 0; |
| set_dma_mode(devpriv->dma, DMA_MODE_READ); |
| dma_flags = claim_dma_lock(); |
| clear_dma_ff(devpriv->dma); |
| set_dma_addr(devpriv->dma, devpriv->hwdmaptr[0]); |
| set_dma_count(devpriv->dma, bytes); |
| release_dma_lock(dma_flags); |
| enable_dma(devpriv->dma); |
| } |
| |
| static void pcl816_ai_setup_next_dma(struct comedi_device *dev, |
| struct comedi_subdevice *s) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| struct comedi_cmd *cmd = &s->async->cmd; |
| unsigned long dma_flags; |
| |
| disable_dma(devpriv->dma); |
| if (devpriv->dma_runs_to_end > -1 || cmd->stop_src == TRIG_NONE) { |
| /* switch dma bufs */ |
| devpriv->next_dma_buf = 1 - devpriv->next_dma_buf; |
| set_dma_mode(devpriv->dma, DMA_MODE_READ); |
| dma_flags = claim_dma_lock(); |
| set_dma_addr(devpriv->dma, |
| devpriv->hwdmaptr[devpriv->next_dma_buf]); |
| if (devpriv->dma_runs_to_end) |
| set_dma_count(devpriv->dma, devpriv->hwdmasize); |
| else |
| set_dma_count(devpriv->dma, devpriv->last_dma_run); |
| release_dma_lock(dma_flags); |
| enable_dma(devpriv->dma); |
| } |
| |
| devpriv->dma_runs_to_end--; |
| } |
| |
| 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 pcl816_private *devpriv = dev->private; |
| struct comedi_cmd *cmd = &s->async->cmd; |
| |
| s->async->events |= COMEDI_CB_BLOCK; |
| |
| s->async->cur_chan++; |
| if (s->async->cur_chan >= cmd->chanlist_len) { |
| s->async->cur_chan = 0; |
| devpriv->ai_act_scan++; |
| s->async->events |= COMEDI_CB_EOS; |
| } |
| |
| if (cmd->stop_src == TRIG_COUNT && |
| devpriv->ai_act_scan >= cmd->stop_arg) { |
| /* all data sampled */ |
| 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) |
| { |
| int i; |
| |
| for (i = 0; i < len; i++) { |
| comedi_buf_put(s->async, ptr[bufptr++]); |
| |
| 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; |
| unsigned short *ptr; |
| unsigned int bufptr; |
| unsigned int len; |
| |
| 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; |
| } |
| |
| ptr = (unsigned short *)devpriv->dmabuf[devpriv->next_dma_buf]; |
| |
| pcl816_ai_setup_next_dma(dev, s); |
| |
| len = (devpriv->hwdmasize >> 1) - devpriv->ai_poll_ptr; |
| bufptr = devpriv->ai_poll_ptr; |
| devpriv->ai_poll_ptr = 0; |
| |
| transfer_from_dma_buf(dev, s, ptr, bufptr, len); |
| |
| pcl816_ai_clear_eoc(dev); |
| |
| cfc_handle_events(dev, s); |
| return IRQ_HANDLED; |
| } |
| |
| static int pcl816_ai_cmdtest(struct comedi_device *dev, |
| struct comedi_subdevice *s, struct comedi_cmd *cmd) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| int err = 0; |
| int tmp; |
| |
| /* Step 1 : check if triggers are trivially valid */ |
| |
| err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW); |
| err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW); |
| err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_EXT | TRIG_TIMER); |
| err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); |
| err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); |
| |
| if (err) |
| return 1; |
| |
| /* Step 2a : make sure trigger sources are unique */ |
| |
| err |= cfc_check_trigger_is_unique(cmd->convert_src); |
| err |= cfc_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 |= cfc_check_trigger_arg_is(&cmd->start_arg, 0); |
| err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0); |
| |
| if (cmd->convert_src == TRIG_TIMER) |
| err |= cfc_check_trigger_arg_min(&cmd->convert_arg, 10000); |
| else /* TRIG_EXT */ |
| err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0); |
| |
| err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len); |
| |
| if (cmd->stop_src == TRIG_COUNT) |
| err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1); |
| else /* TRIG_NONE */ |
| err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0); |
| |
| if (err) |
| return 3; |
| |
| |
| /* step 4: fix up any arguments */ |
| if (cmd->convert_src == TRIG_TIMER) { |
| tmp = cmd->convert_arg; |
| i8253_cascade_ns_to_timer(I8254_OSC_BASE_10MHZ, |
| &devpriv->divisor1, |
| &devpriv->divisor2, |
| &cmd->convert_arg, cmd->flags); |
| if (cmd->convert_arg < 10000) |
| cmd->convert_arg = 10000; |
| if (tmp != cmd->convert_arg) |
| err++; |
| } |
| |
| 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_cmd *cmd = &s->async->cmd; |
| unsigned int ctrl; |
| unsigned int seglen; |
| |
| if (devpriv->ai_cmd_running) |
| return -EBUSY; |
| |
| pcl816_start_pacer(dev, false); |
| |
| 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_act_scan = 0; |
| s->async->cur_chan = 0; |
| devpriv->ai_cmd_running = 1; |
| devpriv->ai_poll_ptr = 0; |
| devpriv->ai_cmd_canceled = 0; |
| |
| pcl816_ai_setup_dma(dev, s); |
| |
| pcl816_start_pacer(dev, true); |
| |
| ctrl = PCL816_CTRL_INTEN | PCL816_CTRL_DMAEN | PCL816_CTRL_DMASRC_SLOT0; |
| 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((devpriv->dma << 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; |
| unsigned long flags; |
| unsigned int top1, top2, i; |
| |
| spin_lock_irqsave(&dev->spinlock, flags); |
| |
| for (i = 0; i < 20; i++) { |
| top1 = get_dma_residue(devpriv->dma); /* where is now DMA */ |
| top2 = get_dma_residue(devpriv->dma); |
| if (top1 == top2) |
| break; |
| } |
| if (top1 != top2) { |
| spin_unlock_irqrestore(&dev->spinlock, flags); |
| return 0; |
| } |
| |
| /* where is now DMA in buffer */ |
| top1 = devpriv->hwdmasize - top1; |
| top1 >>= 1; /* sample position */ |
| top2 = top1 - devpriv->ai_poll_ptr; |
| if (top2 < 1) { /* no new samples */ |
| spin_unlock_irqrestore(&dev->spinlock, flags); |
| return 0; |
| } |
| |
| transfer_from_dma_buf(dev, s, |
| (unsigned short *)devpriv->dmabuf[devpriv-> |
| next_dma_buf], |
| devpriv->ai_poll_ptr, top2); |
| |
| devpriv->ai_poll_ptr = top1; /* new buffer position */ |
| spin_unlock_irqrestore(&dev->spinlock, flags); |
| |
| cfc_handle_events(dev, s); |
| |
| return s->async->buf_write_count - s->async->buf_read_count; |
| } |
| |
| 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(PCL816_CTRL_DISABLE_TRIG, dev->iobase + PCL816_CTRL_REG); |
| pcl816_ai_clear_eoc(dev); |
| |
| /* Stop pacer */ |
| i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0, |
| 2, I8254_MODE0 | I8254_BINARY); |
| i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0, |
| 1, I8254_MODE0 | I8254_BINARY); |
| |
| devpriv->ai_cmd_running = 0; |
| devpriv->ai_cmd_canceled = 1; |
| |
| return 0; |
| } |
| |
| 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, segpos; |
| |
| /* correct channel and range number check itself comedi/range.c */ |
| if (chanlen < 1) { |
| comedi_error(dev, "range/channel list is empty!"); |
| 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, segpos = 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_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(PCL816_CTRL_DISABLE_TRIG, 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) |
| { |
| unsigned long timer_base = dev->iobase + PCL816_TIMER_BASE; |
| |
| outb(PCL816_CTRL_DISABLE_TRIG, dev->iobase + PCL816_CTRL_REG); |
| pcl816_ai_set_chan_range(dev, 0, 0); |
| pcl816_ai_clear_eoc(dev); |
| |
| /* Stop pacer */ |
| i8254_set_mode(timer_base, 0, 2, I8254_MODE0 | I8254_BINARY); |
| i8254_set_mode(timer_base, 0, 1, I8254_MODE0 | I8254_BINARY); |
| i8254_set_mode(timer_base, 0, 0, I8254_MODE0 | I8254_BINARY); |
| |
| /* set all digital outputs low */ |
| outb(0, dev->iobase + PCL816_DO_DI_LSB_REG); |
| outb(0, dev->iobase + PCL816_DO_DI_MSB_REG); |
| } |
| |
| static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
| { |
| const struct pcl816_board *board = comedi_board(dev); |
| struct pcl816_private *devpriv; |
| struct comedi_subdevice *s; |
| int ret; |
| int i; |
| |
| devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); |
| if (!devpriv) |
| return -ENOMEM; |
| |
| ret = comedi_request_region(dev, it->options[0], 0x10); |
| if (ret) |
| return ret; |
| |
| /* we can use IRQ 2-7 for async command support */ |
| if (it->options[1] >= 2 && it->options[1] <= 7) { |
| ret = request_irq(it->options[1], pcl816_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 && (it->options[2] == 3 || it->options[2] == 1)) { |
| ret = request_dma(it->options[2], dev->board_name); |
| if (ret) { |
| dev_err(dev->class_dev, |
| "unable to request DMA channel %d\n", |
| it->options[2]); |
| return -EBUSY; |
| } |
| devpriv->dma = it->options[2]; |
| |
| devpriv->dmapages = 2; /* we need 16KB */ |
| devpriv->hwdmasize = (1 << devpriv->dmapages) * PAGE_SIZE; |
| |
| for (i = 0; i < 2; i++) { |
| unsigned long dmabuf; |
| |
| dmabuf = __get_dma_pages(GFP_KERNEL, devpriv->dmapages); |
| if (!dmabuf) |
| return -ENOMEM; |
| |
| devpriv->dmabuf[i] = dmabuf; |
| devpriv->hwdmaptr[i] = virt_to_bus((void *)dmabuf); |
| } |
| } |
| |
| 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 (devpriv->dma) { |
| 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; |
| } |
| |
| /* Analog OUtput subdevice */ |
| s = &dev->subdevices[2]; |
| s->type = COMEDI_SUBD_UNUSED; |
| #if 0 |
| subdevs[1] = COMEDI_SUBD_AO; |
| s->subdev_flags = SDF_WRITABLE | SDF_GROUND; |
| s->n_chan = 1; |
| s->maxdata = board->ao_maxdata; |
| s->range_table = &range_pcl816; |
| #endif |
| |
| /* 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) |
| { |
| struct pcl816_private *devpriv = dev->private; |
| |
| if (dev->private) { |
| pcl816_ai_cancel(dev, dev->read_subdev); |
| pcl816_reset(dev); |
| if (devpriv->dma) |
| free_dma(devpriv->dma); |
| if (devpriv->dmabuf[0]) |
| free_pages(devpriv->dmabuf[0], devpriv->dmapages); |
| if (devpriv->dmabuf[1]) |
| free_pages(devpriv->dmabuf[1], devpriv->dmapages); |
| } |
| 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 http://www.comedi.org"); |
| MODULE_DESCRIPTION("Comedi low-level driver"); |
| MODULE_LICENSE("GPL"); |