diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/pcl818.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/pcl818.c | 1137 |
1 files changed, 0 insertions, 1137 deletions
diff --git a/drivers/staging/comedi/drivers/pcl818.c b/drivers/staging/comedi/drivers/pcl818.c deleted file mode 100644 index f4b4a686c710..000000000000 --- a/drivers/staging/comedi/drivers/pcl818.c +++ /dev/null @@ -1,1137 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * comedi/drivers/pcl818.c - * - * Driver: pcl818 - * Description: Advantech PCL-818 cards, PCL-718 - * Author: Michal Dobes <dobes@tesnet.cz> - * Devices: [Advantech] PCL-818L (pcl818l), PCL-818H (pcl818h), - * PCL-818HD (pcl818hd), PCL-818HG (pcl818hg), PCL-818 (pcl818), - * PCL-718 (pcl718) - * Status: works - * - * All cards have 16 SE/8 DIFF ADCs, one or two DACs, 16 DI and 16 DO. - * Differences are only at maximal sample speed, range list and FIFO - * support. - * The driver support AI mode 0, 1, 3 other subdevices (AO, DI, DO) support - * only mode 0. If DMA/FIFO/INT are disabled then AI support only mode 0. - * PCL-818HD and PCL-818HG support 1kword FIFO. Driver support this FIFO - * but this code is untested. - * A word or two about DMA. Driver support DMA operations at two ways: - * 1) DMA uses two buffers and after one is filled then is generated - * INT and DMA restart with second buffer. With this mode I'm unable run - * more that 80Ksamples/secs without data dropouts on K6/233. - * 2) DMA uses one buffer and run in autoinit mode and the data are - * from DMA buffer moved on the fly with 2kHz interrupts from RTC. - * This mode is used if the interrupt 8 is available for allocation. - * If not, then first DMA mode is used. With this I can run at - * full speed one card (100ksamples/secs) or two cards with - * 60ksamples/secs each (more is problem on account of ISA limitations). - * To use this mode you must have compiled kernel with disabled - * "Enhanced Real Time Clock Support". - * Maybe you can have problems if you use xntpd or similar. - * If you've data dropouts with DMA mode 2 then: - * a) disable IDE DMA - * b) switch text mode console to fb. - * - * Options for PCL-818L: - * [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 - * [4] - 0, 5=A/D input -5V.. +5V - * 1, 10=A/D input -10V..+10V - * [5] - 0, 5=D/A output 0-5V (internal reference -5V) - * 1, 10=D/A output 0-10V (internal reference -10V) - * 2 =D/A output unknown (external reference) - * - * Options for PCL-818, PCL-818H: - * [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 - * [4] - 0, 5=D/A output 0-5V (internal reference -5V) - * 1, 10=D/A output 0-10V (internal reference -10V) - * 2 =D/A output unknown (external reference) - * - * Options for PCL-818HD, PCL-818HG: - * [0] - IO Base - * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7) - * [2] - DMA/FIFO (-1=use FIFO, 0=disable both FIFO and DMA, - * 1=use DMA ch 1, 3=use DMA ch 3) - * [3] - 0, 10=10MHz clock for 8254 - * 1= 1MHz clock for 8254 - * [4] - 0, 5=D/A output 0-5V (internal reference -5V) - * 1, 10=D/A output 0-10V (internal reference -10V) - * 2 =D/A output unknown (external reference) - * - * Options for PCL-718: - * [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 - * [4] - 0=A/D Range is +/-10V - * 1= +/-5V - * 2= +/-2.5V - * 3= +/-1V - * 4= +/-0.5V - * 5= user defined bipolar - * 6= 0-10V - * 7= 0-5V - * 8= 0-2V - * 9= 0-1V - * 10= user defined unipolar - * [5] - 0, 5=D/A outputs 0-5V (internal reference -5V) - * 1, 10=D/A outputs 0-10V (internal reference -10V) - * 2=D/A outputs unknown (external reference) - * [6] - 0, 60=max 60kHz A/D sampling - * 1,100=max 100kHz A/D sampling (PCL-718 with Option 001 installed) - * - */ - -#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 PCL818_AI_LSB_REG 0x00 -#define PCL818_AI_MSB_REG 0x01 -#define PCL818_RANGE_REG 0x01 -#define PCL818_MUX_REG 0x02 -#define PCL818_MUX_SCAN(_first, _last) (((_last) << 4) | (_first)) -#define PCL818_DO_DI_LSB_REG 0x03 -#define PCL818_AO_LSB_REG(x) (0x04 + ((x) * 2)) -#define PCL818_AO_MSB_REG(x) (0x05 + ((x) * 2)) -#define PCL818_STATUS_REG 0x08 -#define PCL818_STATUS_NEXT_CHAN_MASK (0xf << 0) -#define PCL818_STATUS_INT BIT(4) -#define PCL818_STATUS_MUX BIT(5) -#define PCL818_STATUS_UNI BIT(6) -#define PCL818_STATUS_EOC BIT(7) -#define PCL818_CTRL_REG 0x09 -#define PCL818_CTRL_TRIG(x) (((x) & 0x3) << 0) -#define PCL818_CTRL_DISABLE_TRIG PCL818_CTRL_TRIG(0) -#define PCL818_CTRL_SOFT_TRIG PCL818_CTRL_TRIG(1) -#define PCL818_CTRL_EXT_TRIG PCL818_CTRL_TRIG(2) -#define PCL818_CTRL_PACER_TRIG PCL818_CTRL_TRIG(3) -#define PCL818_CTRL_DMAE BIT(2) -#define PCL818_CTRL_IRQ(x) ((x) << 4) -#define PCL818_CTRL_INTE BIT(7) -#define PCL818_CNTENABLE_REG 0x0a -#define PCL818_CNTENABLE_PACER_TRIG0 BIT(0) -#define PCL818_CNTENABLE_CNT0_INT_CLK BIT(1) /* 0=ext clk */ -#define PCL818_DO_DI_MSB_REG 0x0b -#define PCL818_TIMER_BASE 0x0c - -/* W: fifo enable/disable */ -#define PCL818_FI_ENABLE 6 -/* W: fifo interrupt clear */ -#define PCL818_FI_INTCLR 20 -/* W: fifo interrupt clear */ -#define PCL818_FI_FLUSH 25 -/* R: fifo status */ -#define PCL818_FI_STATUS 25 -/* R: one record from FIFO */ -#define PCL818_FI_DATALO 23 -#define PCL818_FI_DATAHI 24 - -#define MAGIC_DMA_WORD 0x5a5a - -static const struct comedi_lrange range_pcl818h_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_pcl818hg_ai = { - 10, { - 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_pcl818l_l_ai = { - 4, { - BIP_RANGE(5), - BIP_RANGE(2.5), - BIP_RANGE(1.25), - BIP_RANGE(0.625) - } -}; - -static const struct comedi_lrange range_pcl818l_h_ai = { - 4, { - BIP_RANGE(10), - BIP_RANGE(5), - BIP_RANGE(2.5), - BIP_RANGE(1.25) - } -}; - -static const struct comedi_lrange range718_bipolar1 = { - 1, { - BIP_RANGE(1) - } -}; - -static const struct comedi_lrange range718_bipolar0_5 = { - 1, { - BIP_RANGE(0.5) - } -}; - -static const struct comedi_lrange range718_unipolar2 = { - 1, { - UNI_RANGE(2) - } -}; - -static const struct comedi_lrange range718_unipolar1 = { - 1, { - BIP_RANGE(1) - } -}; - -struct pcl818_board { - const char *name; - unsigned int ns_min; - int n_aochan; - const struct comedi_lrange *ai_range_type; - unsigned int has_dma:1; - unsigned int has_fifo:1; - unsigned int is_818:1; -}; - -static const struct pcl818_board boardtypes[] = { - { - .name = "pcl818l", - .ns_min = 25000, - .n_aochan = 1, - .ai_range_type = &range_pcl818l_l_ai, - .has_dma = 1, - .is_818 = 1, - }, { - .name = "pcl818h", - .ns_min = 10000, - .n_aochan = 1, - .ai_range_type = &range_pcl818h_ai, - .has_dma = 1, - .is_818 = 1, - }, { - .name = "pcl818hd", - .ns_min = 10000, - .n_aochan = 1, - .ai_range_type = &range_pcl818h_ai, - .has_dma = 1, - .has_fifo = 1, - .is_818 = 1, - }, { - .name = "pcl818hg", - .ns_min = 10000, - .n_aochan = 1, - .ai_range_type = &range_pcl818hg_ai, - .has_dma = 1, - .has_fifo = 1, - .is_818 = 1, - }, { - .name = "pcl818", - .ns_min = 10000, - .n_aochan = 2, - .ai_range_type = &range_pcl818h_ai, - .has_dma = 1, - .is_818 = 1, - }, { - .name = "pcl718", - .ns_min = 16000, - .n_aochan = 2, - .ai_range_type = &range_unipolar5, - .has_dma = 1, - }, { - .name = "pcm3718", - .ns_min = 10000, - .ai_range_type = &range_pcl818h_ai, - .has_dma = 1, - .is_818 = 1, - }, -}; - -struct pcl818_private { - struct comedi_isadma *dma; - /* manimal allowed delay between samples (in us) for actual card */ - unsigned int ns_min; - /* MUX setting for actual AI operations */ - unsigned int act_chanlist[16]; - unsigned int act_chanlist_len; /* how long is actual MUX list */ - unsigned int act_chanlist_pos; /* actual position in MUX list */ - unsigned int usefifo:1; - unsigned int ai_cmd_running:1; - unsigned int ai_cmd_canceled:1; -}; - -static void pcl818_ai_setup_dma(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int unread_samples) -{ - struct pcl818_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 pcl818_ai_set_chan_range(struct comedi_device *dev, - unsigned int chan, - unsigned int range) -{ - outb(chan, dev->iobase + PCL818_MUX_REG); - outb(range, dev->iobase + PCL818_RANGE_REG); -} - -static void pcl818_ai_set_chan_scan(struct comedi_device *dev, - unsigned int first_chan, - unsigned int last_chan) -{ - outb(PCL818_MUX_SCAN(first_chan, last_chan), - dev->iobase + PCL818_MUX_REG); -} - -static void pcl818_ai_setup_chanlist(struct comedi_device *dev, - unsigned int *chanlist, - unsigned int seglen) -{ - struct pcl818_private *devpriv = dev->private; - unsigned int first_chan = CR_CHAN(chanlist[0]); - unsigned int last_chan; - unsigned int range; - int i; - - devpriv->act_chanlist_len = seglen; - devpriv->act_chanlist_pos = 0; - - /* store range list to card */ - for (i = 0; i < seglen; i++) { - last_chan = CR_CHAN(chanlist[i]); - range = CR_RANGE(chanlist[i]); - - devpriv->act_chanlist[i] = last_chan; - - pcl818_ai_set_chan_range(dev, last_chan, range); - } - - udelay(1); - - pcl818_ai_set_chan_scan(dev, first_chan, last_chan); -} - -static void pcl818_ai_clear_eoc(struct comedi_device *dev) -{ - /* writing any value clears the interrupt request */ - outb(0, dev->iobase + PCL818_STATUS_REG); -} - -static void pcl818_ai_soft_trig(struct comedi_device *dev) -{ - /* writing any value triggers a software conversion */ - outb(0, dev->iobase + PCL818_AI_LSB_REG); -} - -static unsigned int pcl818_ai_get_fifo_sample(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int *chan) -{ - unsigned int val; - - val = inb(dev->iobase + PCL818_FI_DATALO); - val |= (inb(dev->iobase + PCL818_FI_DATAHI) << 8); - - if (chan) - *chan = val & 0xf; - - return (val >> 4) & s->maxdata; -} - -static unsigned int pcl818_ai_get_sample(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int *chan) -{ - unsigned int val; - - val = inb(dev->iobase + PCL818_AI_MSB_REG) << 8; - val |= inb(dev->iobase + PCL818_AI_LSB_REG); - - if (chan) - *chan = val & 0xf; - - return (val >> 4) & s->maxdata; -} - -static int pcl818_ai_eoc(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned int status; - - status = inb(dev->iobase + PCL818_STATUS_REG); - if (status & PCL818_STATUS_INT) - return 0; - return -EBUSY; -} - -static bool pcl818_ai_write_sample(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int chan, unsigned short val) -{ - struct pcl818_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned int expected_chan; - - expected_chan = devpriv->act_chanlist[devpriv->act_chanlist_pos]; - if (chan != expected_chan) { - dev_dbg(dev->class_dev, - "A/D mode1/3 %s - channel dropout %d!=%d !\n", - (devpriv->dma) ? "DMA" : - (devpriv->usefifo) ? "FIFO" : "IRQ", - chan, expected_chan); - s->async->events |= COMEDI_CB_ERROR; - return false; - } - - comedi_buf_write_samples(s, &val, 1); - - devpriv->act_chanlist_pos++; - if (devpriv->act_chanlist_pos >= devpriv->act_chanlist_len) - devpriv->act_chanlist_pos = 0; - - 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 pcl818_handle_eoc(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - unsigned int chan; - unsigned int val; - - if (pcl818_ai_eoc(dev, s, NULL, 0)) { - dev_err(dev->class_dev, "A/D mode1/3 IRQ without DRDY!\n"); - s->async->events |= COMEDI_CB_ERROR; - return; - } - - val = pcl818_ai_get_sample(dev, s, &chan); - pcl818_ai_write_sample(dev, s, chan, val); -} - -static void pcl818_handle_dma(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcl818_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; - unsigned short *ptr = desc->virt_addr; - unsigned int nsamples = comedi_bytes_to_samples(s, desc->size); - unsigned int chan; - unsigned int val; - int i; - - /* restart dma with the next buffer */ - dma->cur_dma = 1 - dma->cur_dma; - pcl818_ai_setup_dma(dev, s, nsamples); - - for (i = 0; i < nsamples; i++) { - val = ptr[i]; - chan = val & 0xf; - val = (val >> 4) & s->maxdata; - if (!pcl818_ai_write_sample(dev, s, chan, val)) - break; - } -} - -static void pcl818_handle_fifo(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - unsigned int status; - unsigned int chan; - unsigned int val; - int i, len; - - status = inb(dev->iobase + PCL818_FI_STATUS); - - if (status & 4) { - dev_err(dev->class_dev, "A/D mode1/3 FIFO overflow!\n"); - s->async->events |= COMEDI_CB_ERROR; - return; - } - - if (status & 1) { - dev_err(dev->class_dev, - "A/D mode1/3 FIFO interrupt without data!\n"); - s->async->events |= COMEDI_CB_ERROR; - return; - } - - if (status & 2) - len = 512; - else - len = 0; - - for (i = 0; i < len; i++) { - val = pcl818_ai_get_fifo_sample(dev, s, &chan); - if (!pcl818_ai_write_sample(dev, s, chan, val)) - break; - } -} - -static irqreturn_t pcl818_interrupt(int irq, void *d) -{ - struct comedi_device *dev = d; - struct pcl818_private *devpriv = dev->private; - struct comedi_subdevice *s = dev->read_subdev; - struct comedi_cmd *cmd = &s->async->cmd; - - if (!dev->attached || !devpriv->ai_cmd_running) { - pcl818_ai_clear_eoc(dev); - return IRQ_HANDLED; - } - - if (devpriv->ai_cmd_canceled) { - /* - * The cleanup from ai_cancel() has been delayed - * until now because the card doesn't seem to like - * being reprogrammed while a DMA transfer is in - * progress. - */ - s->async->scans_done = cmd->stop_arg; - s->cancel(dev, s); - return IRQ_HANDLED; - } - - if (devpriv->dma) - pcl818_handle_dma(dev, s); - else if (devpriv->usefifo) - pcl818_handle_fifo(dev, s); - else - pcl818_handle_eoc(dev, s); - - pcl818_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 n_chan) -{ - unsigned int chansegment[16]; - unsigned int i, nowmustbechan, seglen; - - /* correct channel and range number check itself comedi/range.c */ - if (n_chan < 1) { - dev_err(dev->class_dev, "range/channel list is empty!\n"); - return 0; - } - - if (n_chan > 1) { - /* first channel is every time ok */ - chansegment[0] = chanlist[0]; - /* build part of chanlist */ - for (i = 1, seglen = 1; i < n_chan; i++, seglen++) { - /* we detect loop, this must by finish */ - - if (chanlist[0] == chanlist[i]) - break; - nowmustbechan = - (CR_CHAN(chansegment[i - 1]) + 1) % s->n_chan; - 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 < n_chan; 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; -} - -static int check_single_ended(unsigned int port) -{ - if (inb(port + PCL818_STATUS_REG) & PCL818_STATUS_MUX) - return 1; - return 0; -} - -static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, - struct comedi_cmd *cmd) -{ - const struct pcl818_board *board = dev->board_ptr; - 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_TIMER | TRIG_EXT); - 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, - board->ns_min); - } 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 pcl818_ai_cmd(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcl818_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned int ctrl = 0; - 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; - pcl818_ai_setup_chanlist(dev, cmd->chanlist, seglen); - - devpriv->ai_cmd_running = 1; - devpriv->ai_cmd_canceled = 0; - devpriv->act_chanlist_pos = 0; - - if (cmd->convert_src == TRIG_TIMER) - ctrl |= PCL818_CTRL_PACER_TRIG; - else - ctrl |= PCL818_CTRL_EXT_TRIG; - - outb(0, dev->iobase + PCL818_CNTENABLE_REG); - - if (dma) { - /* setup and enable dma for the first buffer */ - dma->cur_dma = 0; - pcl818_ai_setup_dma(dev, s, 0); - - ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq) | - PCL818_CTRL_DMAE; - } else if (devpriv->usefifo) { - /* enable FIFO */ - outb(1, dev->iobase + PCL818_FI_ENABLE); - } else { - ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq); - } - outb(ctrl, dev->iobase + PCL818_CTRL_REG); - - if (cmd->convert_src == TRIG_TIMER) { - comedi_8254_update_divisors(dev->pacer); - comedi_8254_pacer_enable(dev->pacer, 1, 2, true); - } - - return 0; -} - -static int pcl818_ai_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcl818_private *devpriv = dev->private; - struct comedi_isadma *dma = devpriv->dma; - struct comedi_cmd *cmd = &s->async->cmd; - - if (!devpriv->ai_cmd_running) - return 0; - - if (dma) { - if (cmd->stop_src == TRIG_NONE || - (cmd->stop_src == TRIG_COUNT && - s->async->scans_done < cmd->stop_arg)) { - if (!devpriv->ai_cmd_canceled) { - /* - * Wait for running dma transfer to end, - * do cleanup in interrupt. - */ - devpriv->ai_cmd_canceled = 1; - return 0; - } - } - comedi_isadma_disable(dma->chan); - } - - outb(PCL818_CTRL_DISABLE_TRIG, dev->iobase + PCL818_CTRL_REG); - comedi_8254_pacer_enable(dev->pacer, 1, 2, false); - pcl818_ai_clear_eoc(dev); - - if (devpriv->usefifo) { /* FIFO shutdown */ - outb(0, dev->iobase + PCL818_FI_INTCLR); - outb(0, dev->iobase + PCL818_FI_FLUSH); - outb(0, dev->iobase + PCL818_FI_ENABLE); - } - devpriv->ai_cmd_running = 0; - devpriv->ai_cmd_canceled = 0; - - return 0; -} - -static int pcl818_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(PCL818_CTRL_SOFT_TRIG, dev->iobase + PCL818_CTRL_REG); - - pcl818_ai_set_chan_range(dev, chan, range); - pcl818_ai_set_chan_scan(dev, chan, chan); - - for (i = 0; i < insn->n; i++) { - pcl818_ai_clear_eoc(dev); - pcl818_ai_soft_trig(dev); - - ret = comedi_timeout(dev, s, insn, pcl818_ai_eoc, 0); - if (ret) - break; - - data[i] = pcl818_ai_get_sample(dev, s, NULL); - } - pcl818_ai_clear_eoc(dev); - - return ret ? ret : insn->n; -} - -static int pcl818_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 & 0x000f) << 4, - dev->iobase + PCL818_AO_LSB_REG(chan)); - outb((val & 0x0ff0) >> 4, - dev->iobase + PCL818_AO_MSB_REG(chan)); - } - s->readback[chan] = val; - - return insn->n; -} - -static int pcl818_di_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - data[1] = inb(dev->iobase + PCL818_DO_DI_LSB_REG) | - (inb(dev->iobase + PCL818_DO_DI_MSB_REG) << 8); - - return insn->n; -} - -static int pcl818_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 + PCL818_DO_DI_LSB_REG); - outb((s->state >> 8), dev->iobase + PCL818_DO_DI_MSB_REG); - } - - data[1] = s->state; - - return insn->n; -} - -static void pcl818_reset(struct comedi_device *dev) -{ - const struct pcl818_board *board = dev->board_ptr; - unsigned int chan; - - /* flush and disable the FIFO */ - if (board->has_fifo) { - outb(0, dev->iobase + PCL818_FI_INTCLR); - outb(0, dev->iobase + PCL818_FI_FLUSH); - outb(0, dev->iobase + PCL818_FI_ENABLE); - } - - /* disable analog input trigger */ - outb(PCL818_CTRL_DISABLE_TRIG, dev->iobase + PCL818_CTRL_REG); - pcl818_ai_clear_eoc(dev); - - pcl818_ai_set_chan_range(dev, 0, 0); - - /* stop pacer */ - outb(0, dev->iobase + PCL818_CNTENABLE_REG); - - /* set analog output channels to 0V */ - for (chan = 0; chan < board->n_aochan; chan++) { - outb(0, dev->iobase + PCL818_AO_LSB_REG(chan)); - outb(0, dev->iobase + PCL818_AO_MSB_REG(chan)); - } - - /* set all digital outputs low */ - outb(0, dev->iobase + PCL818_DO_DI_MSB_REG); - outb(0, dev->iobase + PCL818_DO_DI_LSB_REG); -} - -static void pcl818_set_ai_range_table(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_devconfig *it) -{ - const struct pcl818_board *board = dev->board_ptr; - - /* default to the range table from the boardinfo */ - s->range_table = board->ai_range_type; - - /* now check the user config option based on the boardtype */ - if (board->is_818) { - if (it->options[4] == 1 || it->options[4] == 10) { - /* secondary range list jumper selectable */ - s->range_table = &range_pcl818l_h_ai; - } - } else { - 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 = &range718_bipolar1; - break; - case 4: - s->range_table = &range718_bipolar0_5; - break; - case 6: - s->range_table = &range_unipolar10; - break; - case 7: - s->range_table = &range_unipolar5; - break; - case 8: - s->range_table = &range718_unipolar2; - break; - case 9: - s->range_table = &range718_unipolar1; - break; - default: - s->range_table = &range_unknown; - break; - } - } -} - -static void pcl818_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) -{ - struct pcl818_private *devpriv = dev->private; - - /* only DMA channels 3 and 1 are valid */ - if (!(dma_chan == 3 || dma_chan == 1)) - return; - - /* DMA uses two 16K buffers */ - devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan, - PAGE_SIZE * 4, COMEDI_ISADMA_READ); -} - -static void pcl818_free_dma(struct comedi_device *dev) -{ - struct pcl818_private *devpriv = dev->private; - - if (devpriv) - comedi_isadma_free(devpriv->dma); -} - -static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it) -{ - const struct pcl818_board *board = dev->board_ptr; - struct pcl818_private *devpriv; - struct comedi_subdevice *s; - unsigned int osc_base; - int ret; - - devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); - if (!devpriv) - return -ENOMEM; - - ret = comedi_request_region(dev, it->options[0], - board->has_fifo ? 0x20 : 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], pcl818_interrupt, 0, - dev->board_name, dev); - if (ret == 0) - dev->irq = it->options[1]; - } - - /* should we use the FIFO? */ - if (dev->irq && board->has_fifo && it->options[2] == -1) - devpriv->usefifo = 1; - - /* we need an IRQ to do DMA on channel 3 or 1 */ - if (dev->irq && board->has_dma) - pcl818_alloc_dma(dev, it->options[2]); - - /* use 1MHz or 10MHz oscilator */ - if ((it->options[3] == 0) || (it->options[3] == 10)) - osc_base = I8254_OSC_BASE_10MHZ; - else - osc_base = I8254_OSC_BASE_1MHZ; - - dev->pacer = comedi_8254_init(dev->iobase + PCL818_TIMER_BASE, - osc_base, I8254_IO8, 0); - if (!dev->pacer) - return -ENOMEM; - - /* max sampling speed */ - devpriv->ns_min = board->ns_min; - if (!board->is_818) { - /* extended PCL718 to 100kHz DAC */ - if ((it->options[6] == 1) || (it->options[6] == 100)) - devpriv->ns_min = 10000; - } - - ret = comedi_alloc_subdevices(dev, 4); - if (ret) - return ret; - - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE; - if (check_single_ended(dev->iobase)) { - s->n_chan = 16; - s->subdev_flags |= SDF_COMMON | SDF_GROUND; - } else { - s->n_chan = 8; - s->subdev_flags |= SDF_DIFF; - } - s->maxdata = 0x0fff; - - pcl818_set_ai_range_table(dev, s, it); - - s->insn_read = pcl818_ai_insn_read; - if (dev->irq) { - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ; - s->len_chanlist = s->n_chan; - s->do_cmdtest = ai_cmdtest; - s->do_cmd = pcl818_ai_cmd; - s->cancel = pcl818_ai_cancel; - } - - /* Analog Output subdevice */ - s = &dev->subdevices[1]; - if (board->n_aochan) { - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_WRITABLE | SDF_GROUND; - s->n_chan = board->n_aochan; - s->maxdata = 0x0fff; - s->range_table = &range_unipolar5; - if (board->is_818) { - if ((it->options[4] == 1) || (it->options[4] == 10)) - s->range_table = &range_unipolar10; - if (it->options[4] == 2) - s->range_table = &range_unknown; - } else { - if ((it->options[5] == 1) || (it->options[5] == 10)) - s->range_table = &range_unipolar10; - if (it->options[5] == 2) - s->range_table = &range_unknown; - } - s->insn_write = pcl818_ao_insn_write; - - ret = comedi_alloc_subdev_readback(s); - if (ret) - return ret; - } else { - 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 = pcl818_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 = pcl818_do_insn_bits; - - pcl818_reset(dev); - - return 0; -} - -static void pcl818_detach(struct comedi_device *dev) -{ - struct pcl818_private *devpriv = dev->private; - - if (devpriv) { - pcl818_ai_cancel(dev, dev->read_subdev); - pcl818_reset(dev); - } - pcl818_free_dma(dev); - comedi_legacy_detach(dev); -} - -static struct comedi_driver pcl818_driver = { - .driver_name = "pcl818", - .module = THIS_MODULE, - .attach = pcl818_attach, - .detach = pcl818_detach, - .board_name = &boardtypes[0].name, - .num_names = ARRAY_SIZE(boardtypes), - .offset = sizeof(struct pcl818_board), -}; -module_comedi_driver(pcl818_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi low-level driver"); -MODULE_LICENSE("GPL"); |