// SPDX-License-Identifier: GPL-2.0 /* * comedi/drivers/pcl812.c * * Author: Michal Dobes * * hardware driver for Advantech cards * card: PCL-812, PCL-812PG, PCL-813, PCL-813B * driver: pcl812, pcl812pg, pcl813, pcl813b * and for ADlink cards * card: ACL-8112DG, ACL-8112HG, ACL-8112PG, ACL-8113, ACL-8216 * driver: acl8112dg, acl8112hg, acl8112pg, acl8113, acl8216 * and for ICP DAS cards * card: ISO-813, A-821PGH, A-821PGL, A-821PGL-NDA, A-822PGH, A-822PGL, * driver: iso813, a821pgh, a-821pgl, a-821pglnda, a822pgh, a822pgl, * card: A-823PGH, A-823PGL, A-826PG * driver: a823pgh, a823pgl, a826pg */ /* * Driver: pcl812 * Description: Advantech PCL-812/PG, PCL-813/B, * ADLink ACL-8112DG/HG/PG, ACL-8113, ACL-8216, * ICP DAS A-821PGH/PGL/PGL-NDA, A-822PGH/PGL, A-823PGH/PGL, A-826PG, * ICP DAS ISO-813 * Author: Michal Dobes * Devices: [Advantech] PCL-812 (pcl812), PCL-812PG (pcl812pg), * PCL-813 (pcl813), PCL-813B (pcl813b), [ADLink] ACL-8112DG (acl8112dg), * ACL-8112HG (acl8112hg), ACL-8113 (acl-8113), ACL-8216 (acl8216), * [ICP] ISO-813 (iso813), A-821PGH (a821pgh), A-821PGL (a821pgl), * A-821PGL-NDA (a821pclnda), A-822PGH (a822pgh), A-822PGL (a822pgl), * A-823PGH (a823pgh), A-823PGL (a823pgl), A-826PG (a826pg) * Updated: Mon, 06 Aug 2007 12:03:15 +0100 * Status: works (I hope. My board fire up under my hands * and I cann't test all features.) * * This driver supports insn and cmd interfaces. Some boards support only insn * because their hardware don't allow more (PCL-813/B, ACL-8113, ISO-813). * Data transfer over DMA is supported only when you measure only one * channel, this is too hardware limitation of these boards. * * Options for PCL-812: * [0] - IO Base * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15) * [2] - DMA (0=disable, 1, 3) * [3] - 0=trigger source is internal 8253 with 2MHz clock * 1=trigger source is external * [4] - 0=A/D input range is +/-10V * 1=A/D input range is +/-5V * 2=A/D input range is +/-2.5V * 3=A/D input range is +/-1.25V * 4=A/D input range is +/-0.625V * 5=A/D input range is +/-0.3125V * [5] - 0=D/A outputs 0-5V (internal reference -5V) * 1=D/A outputs 0-10V (internal reference -10V) * 2=D/A outputs unknown (external reference) * * Options for PCL-812PG, ACL-8112PG: * [0] - IO Base * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15) * [2] - DMA (0=disable, 1, 3) * [3] - 0=trigger source is internal 8253 with 2MHz clock * 1=trigger source is external * [4] - 0=A/D have max +/-5V input * 1=A/D have max +/-10V input * [5] - 0=D/A outputs 0-5V (internal reference -5V) * 1=D/A outputs 0-10V (internal reference -10V) * 2=D/A outputs unknown (external reference) * * Options for ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH, ACL-8216, A-826PG: * [0] - IO Base * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15) * [2] - DMA (0=disable, 1, 3) * [3] - 0=trigger source is internal 8253 with 2MHz clock * 1=trigger source is external * [4] - 0=A/D channels are S.E. * 1=A/D channels are DIFF * [5] - 0=D/A outputs 0-5V (internal reference -5V) * 1=D/A outputs 0-10V (internal reference -10V) * 2=D/A outputs unknown (external reference) * * Options for A-821PGL/PGH: * [0] - IO Base * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7) * [2] - 0=A/D channels are S.E. * 1=A/D channels are DIFF * [3] - 0=D/A output 0-5V (internal reference -5V) * 1=D/A output 0-10V (internal reference -10V) * * Options for A-821PGL-NDA: * [0] - IO Base * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7) * [2] - 0=A/D channels are S.E. * 1=A/D channels are DIFF * * Options for PCL-813: * [0] - IO Base * * Options for PCL-813B: * [0] - IO Base * [1] - 0= bipolar inputs * 1= unipolar inputs * * Options for ACL-8113, ISO-813: * [0] - IO Base * [1] - 0= 10V bipolar inputs * 1= 10V unipolar inputs * 2= 20V bipolar inputs * 3= 20V unipolar inputs */ #include #include #include #include #include #include "../comedidev.h" #include "comedi_isadma.h" #include "comedi_8254.h" /* * Register I/O map */ #define PCL812_TIMER_BASE 0x00 #define PCL812_AI_LSB_REG 0x04 #define PCL812_AI_MSB_REG 0x05 #define PCL812_AI_MSB_DRDY BIT(4) #define PCL812_AO_LSB_REG(x) (0x04 + ((x) * 2)) #define PCL812_AO_MSB_REG(x) (0x05 + ((x) * 2)) #define PCL812_DI_LSB_REG 0x06 #define PCL812_DI_MSB_REG 0x07 #define PCL812_STATUS_REG 0x08 #define PCL812_STATUS_DRDY BIT(5) #define PCL812_RANGE_REG 0x09 #define PCL812_MUX_REG 0x0a #define PCL812_MUX_CHAN(x) ((x) << 0) #define PCL812_MUX_CS0 BIT(4) #define PCL812_MUX_CS1 BIT(5) #define PCL812_CTRL_REG 0x0b #define PCL812_CTRL_TRIG(x) (((x) & 0x7) << 0) #define PCL812_CTRL_DISABLE_TRIG PCL812_CTRL_TRIG(0) #define PCL812_CTRL_SOFT_TRIG PCL812_CTRL_TRIG(1) #define PCL812_CTRL_PACER_DMA_TRIG PCL812_CTRL_TRIG(2) #define PCL812_CTRL_PACER_EOC_TRIG PCL812_CTRL_TRIG(6) #define PCL812_SOFTTRIG_REG 0x0c #define PCL812_DO_LSB_REG 0x0d #define PCL812_DO_MSB_REG 0x0e #define MAX_CHANLIST_LEN 256 /* length of scan list */ static const struct comedi_lrange range_pcl812pg_ai = { 5, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625), BIP_RANGE(0.3125) } }; static const struct comedi_lrange range_pcl812pg2_ai = { 5, { BIP_RANGE(10), BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625) } }; static const struct comedi_lrange range812_bipolar1_25 = { 1, { BIP_RANGE(1.25) } }; static const struct comedi_lrange range812_bipolar0_625 = { 1, { BIP_RANGE(0.625) } }; static const struct comedi_lrange range812_bipolar0_3125 = { 1, { BIP_RANGE(0.3125) } }; static const struct comedi_lrange range_pcl813b_ai = { 4, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625) } }; static const struct comedi_lrange range_pcl813b2_ai = { 4, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25) } }; static const struct comedi_lrange range_iso813_1_ai = { 5, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625), BIP_RANGE(0.3125) } }; static const struct comedi_lrange range_iso813_1_2_ai = { 5, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25), UNI_RANGE(0.625) } }; static const struct comedi_lrange range_iso813_2_ai = { 4, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625) } }; static const struct comedi_lrange range_iso813_2_2_ai = { 4, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25) } }; static const struct comedi_lrange range_acl8113_1_ai = { 4, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625) } }; static const struct comedi_lrange range_acl8113_1_2_ai = { 4, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25) } }; static const struct comedi_lrange range_acl8113_2_ai = { 3, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25) } }; static const struct comedi_lrange range_acl8113_2_2_ai = { 3, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5) } }; static const struct comedi_lrange range_acl8112dg_ai = { 9, { BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25), BIP_RANGE(0.625), UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25), BIP_RANGE(10) } }; static const struct comedi_lrange range_acl8112hg_ai = { 12, { BIP_RANGE(5), BIP_RANGE(0.5), BIP_RANGE(0.05), BIP_RANGE(0.005), UNI_RANGE(10), UNI_RANGE(1), UNI_RANGE(0.1), UNI_RANGE(0.01), BIP_RANGE(10), BIP_RANGE(1), BIP_RANGE(0.1), BIP_RANGE(0.01) } }; static const struct comedi_lrange range_a821pgh_ai = { 4, { BIP_RANGE(5), BIP_RANGE(0.5), BIP_RANGE(0.05), BIP_RANGE(0.005) } }; enum pcl812_boardtype { BOARD_PCL812PG = 0, /* and ACL-8112PG */ BOARD_PCL813B = 1, BOARD_PCL812 = 2, BOARD_PCL813 = 3, BOARD_ISO813 = 5, BOARD_ACL8113 = 6, BOARD_ACL8112 = 7, /* ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH */ BOARD_ACL8216 = 8, /* and ICP DAS A-826PG */ BOARD_A821 = 9, /* PGH, PGL, PGL/NDA versions */ }; struct pcl812_board { const char *name; enum pcl812_boardtype board_type; int n_aichan; int n_aochan; unsigned int ai_ns_min; const struct comedi_lrange *rangelist_ai; unsigned int irq_bits; unsigned int has_dma:1; unsigned int has_16bit_ai:1; unsigned int has_mpc508_mux:1; unsigned int has_dio:1; }; static const struct pcl812_board boardtypes[] = { { .name = "pcl812", .board_type = BOARD_PCL812, .n_aichan = 16, .n_aochan = 2, .ai_ns_min = 33000, .rangelist_ai = &range_bipolar10, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "pcl812pg", .board_type = BOARD_PCL812PG, .n_aichan = 16, .n_aochan = 2, .ai_ns_min = 33000, .rangelist_ai = &range_pcl812pg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "acl8112pg", .board_type = BOARD_PCL812PG, .n_aichan = 16, .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_pcl812pg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "acl8112dg", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_acl8112dg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_mpc508_mux = 1, .has_dio = 1, }, { .name = "acl8112hg", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_acl8112hg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_mpc508_mux = 1, .has_dio = 1, }, { .name = "a821pgl", .board_type = BOARD_A821, .n_aichan = 16, /* 8 differential */ .n_aochan = 1, .ai_ns_min = 10000, .rangelist_ai = &range_pcl813b_ai, .irq_bits = 0x000c, .has_dio = 1, }, { .name = "a821pglnda", .board_type = BOARD_A821, .n_aichan = 16, /* 8 differential */ .ai_ns_min = 10000, .rangelist_ai = &range_pcl813b_ai, .irq_bits = 0x000c, }, { .name = "a821pgh", .board_type = BOARD_A821, .n_aichan = 16, /* 8 differential */ .n_aochan = 1, .ai_ns_min = 10000, .rangelist_ai = &range_a821pgh_ai, .irq_bits = 0x000c, .has_dio = 1, }, { .name = "a822pgl", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_acl8112dg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "a822pgh", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_acl8112hg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "a823pgl", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 8000, .rangelist_ai = &range_acl8112dg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "a823pgh", .board_type = BOARD_ACL8112, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 8000, .rangelist_ai = &range_acl8112hg_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_dio = 1, }, { .name = "pcl813", .board_type = BOARD_PCL813, .n_aichan = 32, .rangelist_ai = &range_pcl813b_ai, }, { .name = "pcl813b", .board_type = BOARD_PCL813B, .n_aichan = 32, .rangelist_ai = &range_pcl813b_ai, }, { .name = "acl8113", .board_type = BOARD_ACL8113, .n_aichan = 32, .rangelist_ai = &range_acl8113_1_ai, }, { .name = "iso813", .board_type = BOARD_ISO813, .n_aichan = 32, .rangelist_ai = &range_iso813_1_ai, }, { .name = "acl8216", .board_type = BOARD_ACL8216, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_pcl813b2_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_16bit_ai = 1, .has_mpc508_mux = 1, .has_dio = 1, }, { .name = "a826pg", .board_type = BOARD_ACL8216, .n_aichan = 16, /* 8 differential */ .n_aochan = 2, .ai_ns_min = 10000, .rangelist_ai = &range_pcl813b2_ai, .irq_bits = 0xdcfc, .has_dma = 1, .has_16bit_ai = 1, .has_dio = 1, }, }; struct pcl812_private { struct comedi_isadma *dma; unsigned char range_correction; /* =1 we must add 1 to range number */ unsigned int last_ai_chanspec; unsigned char mode_reg_int; /* stored INT number for some cards */ unsigned int ai_poll_ptr; /* how many samples transfer poll */ unsigned int max_812_ai_mode0_rangewait; /* settling time for gain */ unsigned int use_diff:1; unsigned int use_mpc508:1; unsigned int use_ext_trg:1; unsigned int ai_dma:1; unsigned int ai_eos:1; }; static void pcl812_ai_setup_dma(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int unread_samples) { struct pcl812_private *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; unsigned int bytes; unsigned int max_samples; unsigned int nsamples; comedi_isadma_disable(dma->chan); /* if using EOS, adapt DMA buffer to one scan */ bytes = devpriv->ai_eos ? comedi_bytes_per_scan(s) : desc->maxsize; max_samples = comedi_bytes_to_samples(s, bytes); /* * Determine dma size based on the buffer size plus the number of * unread samples and the number of samples remaining in the command. */ nsamples = comedi_nsamples_left(s, max_samples + unread_samples); if (nsamples > unread_samples) { nsamples -= unread_samples; desc->size = comedi_samples_to_bytes(s, nsamples); comedi_isadma_program(desc); } } static void pcl812_ai_set_chan_range(struct comedi_device *dev, unsigned int chanspec, char wait) { struct pcl812_private *devpriv = dev->private; unsigned int chan = CR_CHAN(chanspec); unsigned int range = CR_RANGE(chanspec); unsigned int mux = 0; if (chanspec == devpriv->last_ai_chanspec) return; devpriv->last_ai_chanspec = chanspec; if (devpriv->use_mpc508) { if (devpriv->use_diff) { mux |= PCL812_MUX_CS0 | PCL812_MUX_CS1; } else { if (chan < 8) mux |= PCL812_MUX_CS0; else mux |= PCL812_MUX_CS1; } } outb(mux | PCL812_MUX_CHAN(chan), dev->iobase + PCL812_MUX_REG); outb(range + devpriv->range_correction, dev->iobase + PCL812_RANGE_REG); if (wait) /* * XXX this depends on selected range and can be very long for * some high gain ranges! */ udelay(devpriv->max_812_ai_mode0_rangewait); } static void pcl812_ai_clear_eoc(struct comedi_device *dev) { /* writing any value clears the interrupt request */ outb(0, dev->iobase + PCL812_STATUS_REG); } static void pcl812_ai_soft_trig(struct comedi_device *dev) { /* writing any value triggers a software conversion */ outb(255, dev->iobase + PCL812_SOFTTRIG_REG); } static unsigned int pcl812_ai_get_sample(struct comedi_device *dev, struct comedi_subdevice *s) { unsigned int val; val = inb(dev->iobase + PCL812_AI_MSB_REG) << 8; val |= inb(dev->iobase + PCL812_AI_LSB_REG); return val & s->maxdata; } static int pcl812_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { unsigned int status; if (s->maxdata > 0x0fff) { status = inb(dev->iobase + PCL812_STATUS_REG); if ((status & PCL812_STATUS_DRDY) == 0) return 0; } else { status = inb(dev->iobase + PCL812_AI_MSB_REG); if ((status & PCL812_AI_MSB_DRDY) == 0) return 0; } return -EBUSY; } static int pcl812_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { const struct pcl812_board *board = dev->board_ptr; struct pcl812_private *devpriv = dev->private; int err = 0; unsigned int flags; /* Step 1 : check if triggers are trivially valid */ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW); if (devpriv->use_ext_trg) flags = TRIG_EXT; else flags = TRIG_TIMER; err |= comedi_check_trigger_src(&cmd->convert_src, flags); err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); if (err) return 1; /* Step 2a : make sure trigger sources are unique */ err |= comedi_check_trigger_is_unique(cmd->stop_src); /* Step 2b : and mutually compatible */ if (err) return 2; /* Step 3: check if arguments are trivially valid */ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); if (cmd->convert_src == TRIG_TIMER) { err |= comedi_check_trigger_arg_min(&cmd->convert_arg, board->ai_ns_min); } else { /* TRIG_EXT */ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); } err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1); err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len); if (cmd->stop_src == TRIG_COUNT) err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); else /* TRIG_NONE */ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); if (err) return 3; /* step 4: fix up any arguments */ if (cmd->convert_src == TRIG_TIMER) { unsigned int arg = cmd->convert_arg; comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg); } if (err) return 4; return 0; } static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { struct pcl812_private *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; struct comedi_cmd *cmd = &s->async->cmd; unsigned int ctrl = 0; unsigned int i; pcl812_ai_set_chan_range(dev, cmd->chanlist[0], 1); if (dma) { /* check if we can use DMA transfer */ devpriv->ai_dma = 1; for (i = 1; i < cmd->chanlist_len; i++) if (cmd->chanlist[0] != cmd->chanlist[i]) { /* we cann't use DMA :-( */ devpriv->ai_dma = 0; break; } } else { devpriv->ai_dma = 0; } devpriv->ai_poll_ptr = 0; /* don't we want wake up every scan? */ if (cmd->flags & CMDF_WAKE_EOS) { devpriv->ai_eos = 1; /* DMA is useless for this situation */ if (cmd->chanlist_len == 1) devpriv->ai_dma = 0; } if (devpriv->ai_dma) { /* setup and enable dma for the first buffer */ dma->cur_dma = 0; pcl812_ai_setup_dma(dev, s, 0); } switch (cmd->convert_src) { case TRIG_TIMER: comedi_8254_update_divisors(dev->pacer); comedi_8254_pacer_enable(dev->pacer, 1, 2, true); break; } if (devpriv->ai_dma) ctrl |= PCL812_CTRL_PACER_DMA_TRIG; else ctrl |= PCL812_CTRL_PACER_EOC_TRIG; outb(devpriv->mode_reg_int | ctrl, dev->iobase + PCL812_CTRL_REG); return 0; } static bool pcl812_ai_next_chan(struct comedi_device *dev, struct comedi_subdevice *s) { struct comedi_cmd *cmd = &s->async->cmd; if (cmd->stop_src == TRIG_COUNT && s->async->scans_done >= cmd->stop_arg) { s->async->events |= COMEDI_CB_EOA; return false; } return true; } static void pcl812_handle_eoc(struct comedi_device *dev, struct comedi_subdevice *s) { struct comedi_cmd *cmd = &s->async->cmd; unsigned int chan = s->async->cur_chan; unsigned int next_chan; unsigned short val; if (pcl812_ai_eoc(dev, s, NULL, 0)) { dev_dbg(dev->class_dev, "A/D cmd IRQ without DRDY!\n"); s->async->events |= COMEDI_CB_ERROR; return; } val = pcl812_ai_get_sample(dev, s); comedi_buf_write_samples(s, &val, 1); /* Set up next channel. Added by abbotti 2010-01-20, but untested. */ next_chan = s->async->cur_chan; if (cmd->chanlist[chan] != cmd->chanlist[next_chan]) pcl812_ai_set_chan_range(dev, cmd->chanlist[next_chan], 0); pcl812_ai_next_chan(dev, s); } static void transfer_from_dma_buf(struct comedi_device *dev, struct comedi_subdevice *s, unsigned short *ptr, unsigned int bufptr, unsigned int len) { unsigned int i; unsigned short val; for (i = len; i; i--) { val = ptr[bufptr++]; comedi_buf_write_samples(s, &val, 1); if (!pcl812_ai_next_chan(dev, s)) break; } } static void pcl812_handle_dma(struct comedi_device *dev, struct comedi_subdevice *s) { struct pcl812_private *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; unsigned int nsamples; int bufptr; nsamples = comedi_bytes_to_samples(s, desc->size) - devpriv->ai_poll_ptr; bufptr = devpriv->ai_poll_ptr; devpriv->ai_poll_ptr = 0; /* restart dma with the next buffer */ dma->cur_dma = 1 - dma->cur_dma; pcl812_ai_setup_dma(dev, s, nsamples); transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples); } static irqreturn_t pcl812_interrupt(int irq, void *d) { struct comedi_device *dev = d; struct comedi_subdevice *s = dev->read_subdev; struct pcl812_private *devpriv = dev->private; if (!dev->attached) { pcl812_ai_clear_eoc(dev); return IRQ_HANDLED; } if (devpriv->ai_dma) pcl812_handle_dma(dev, s); else pcl812_handle_eoc(dev, s); pcl812_ai_clear_eoc(dev); comedi_handle_events(dev, s); return IRQ_HANDLED; } static int pcl812_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s) { struct pcl812_private *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; struct comedi_isadma_desc *desc; unsigned long flags; unsigned int poll; int ret; /* poll is valid only for DMA transfer */ if (!devpriv->ai_dma) return 0; spin_lock_irqsave(&dev->spinlock, flags); poll = comedi_isadma_poll(dma); poll = comedi_bytes_to_samples(s, poll); if (poll > devpriv->ai_poll_ptr) { desc = &dma->desc[dma->cur_dma]; transfer_from_dma_buf(dev, s, desc->virt_addr, devpriv->ai_poll_ptr, poll - devpriv->ai_poll_ptr); /* new buffer position */ devpriv->ai_poll_ptr = poll; ret = comedi_buf_n_bytes_ready(s); } else { /* no new samples */ ret = 0; } spin_unlock_irqrestore(&dev->spinlock, flags); return ret; } static int pcl812_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { struct pcl812_private *devpriv = dev->private; if (devpriv->ai_dma) comedi_isadma_disable(devpriv->dma->chan); outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG, dev->iobase + PCL812_CTRL_REG); comedi_8254_pacer_enable(dev->pacer, 1, 2, false); pcl812_ai_clear_eoc(dev); return 0; } static int pcl812_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct pcl812_private *devpriv = dev->private; int ret = 0; int i; outb(devpriv->mode_reg_int | PCL812_CTRL_SOFT_TRIG, dev->iobase + PCL812_CTRL_REG); pcl812_ai_set_chan_range(dev, insn->chanspec, 1); for (i = 0; i < insn->n; i++) { pcl812_ai_clear_eoc(dev); pcl812_ai_soft_trig(dev); ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0); if (ret) break; data[i] = pcl812_ai_get_sample(dev, s); } outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG, dev->iobase + PCL812_CTRL_REG); pcl812_ai_clear_eoc(dev); return ret ? ret : insn->n; } static int pcl812_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { unsigned int chan = CR_CHAN(insn->chanspec); unsigned int val = s->readback[chan]; int i; for (i = 0; i < insn->n; i++) { val = data[i]; outb(val & 0xff, dev->iobase + PCL812_AO_LSB_REG(chan)); outb((val >> 8) & 0x0f, dev->iobase + PCL812_AO_MSB_REG(chan)); } s->readback[chan] = val; return insn->n; } static int pcl812_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { data[1] = inb(dev->iobase + PCL812_DI_LSB_REG) | (inb(dev->iobase + PCL812_DI_MSB_REG) << 8); return insn->n; } static int pcl812_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { if (comedi_dio_update_state(s, data)) { outb(s->state & 0xff, dev->iobase + PCL812_DO_LSB_REG); outb((s->state >> 8), dev->iobase + PCL812_DO_MSB_REG); } data[1] = s->state; return insn->n; } static void pcl812_reset(struct comedi_device *dev) { const struct pcl812_board *board = dev->board_ptr; struct pcl812_private *devpriv = dev->private; unsigned int chan; /* disable analog input trigger */ outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG, dev->iobase + PCL812_CTRL_REG); pcl812_ai_clear_eoc(dev); /* * Invalidate last_ai_chanspec then set analog input to * known channel/range. */ devpriv->last_ai_chanspec = CR_PACK(16, 0, 0); pcl812_ai_set_chan_range(dev, CR_PACK(0, 0, 0), 0); /* set analog output channels to 0V */ for (chan = 0; chan < board->n_aochan; chan++) { outb(0, dev->iobase + PCL812_AO_LSB_REG(chan)); outb(0, dev->iobase + PCL812_AO_MSB_REG(chan)); } /* set all digital outputs low */ if (board->has_dio) { outb(0, dev->iobase + PCL812_DO_MSB_REG); outb(0, dev->iobase + PCL812_DO_LSB_REG); } } static void pcl812_set_ai_range_table(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_devconfig *it) { const struct pcl812_board *board = dev->board_ptr; struct pcl812_private *devpriv = dev->private; switch (board->board_type) { case BOARD_PCL812PG: if (it->options[4] == 1) s->range_table = &range_pcl812pg2_ai; else s->range_table = board->rangelist_ai; break; case BOARD_PCL812: switch (it->options[4]) { case 0: s->range_table = &range_bipolar10; break; case 1: s->range_table = &range_bipolar5; break; case 2: s->range_table = &range_bipolar2_5; break; case 3: s->range_table = &range812_bipolar1_25; break; case 4: s->range_table = &range812_bipolar0_625; break; case 5: s->range_table = &range812_bipolar0_3125; break; default: s->range_table = &range_bipolar10; break; } break; case BOARD_PCL813B: if (it->options[1] == 1) s->range_table = &range_pcl813b2_ai; else s->range_table = board->rangelist_ai; break; case BOARD_ISO813: switch (it->options[1]) { case 0: s->range_table = &range_iso813_1_ai; break; case 1: s->range_table = &range_iso813_1_2_ai; break; case 2: s->range_table = &range_iso813_2_ai; devpriv->range_correction = 1; break; case 3: s->range_table = &range_iso813_2_2_ai; devpriv->range_correction = 1; break; default: s->range_table = &range_iso813_1_ai; break; } break; case BOARD_ACL8113: switch (it->options[1]) { case 0: s->range_table = &range_acl8113_1_ai; break; case 1: s->range_table = &range_acl8113_1_2_ai; break; case 2: s->range_table = &range_acl8113_2_ai; devpriv->range_correction = 1; break; case 3: s->range_table = &range_acl8113_2_2_ai; devpriv->range_correction = 1; break; default: s->range_table = &range_acl8113_1_ai; break; } break; default: s->range_table = board->rangelist_ai; break; } } static void pcl812_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) { struct pcl812_private *devpriv = dev->private; /* only DMA channels 3 and 1 are valid */ if (!(dma_chan == 3 || dma_chan == 1)) return; /* DMA uses two 8K buffers */ devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan, PAGE_SIZE * 2, COMEDI_ISADMA_READ); } static void pcl812_free_dma(struct comedi_device *dev) { struct pcl812_private *devpriv = dev->private; if (devpriv) comedi_isadma_free(devpriv->dma); } static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it) { const struct pcl812_board *board = dev->board_ptr; struct pcl812_private *devpriv; struct comedi_subdevice *s; int n_subdevices; int subdev; int ret; devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; ret = comedi_request_region(dev, it->options[0], 0x10); if (ret) return ret; if (board->irq_bits) { dev->pacer = comedi_8254_init(dev->iobase + PCL812_TIMER_BASE, I8254_OSC_BASE_2MHZ, I8254_IO8, 0); if (!dev->pacer) return -ENOMEM; if ((1 << it->options[1]) & board->irq_bits) { ret = request_irq(it->options[1], pcl812_interrupt, 0, dev->board_name, dev); if (ret == 0) dev->irq = it->options[1]; } } /* we need an IRQ to do DMA on channel 3 or 1 */ if (dev->irq && board->has_dma) pcl812_alloc_dma(dev, it->options[2]); /* differential analog inputs? */ switch (board->board_type) { case BOARD_A821: if (it->options[2] == 1) devpriv->use_diff = 1; break; case BOARD_ACL8112: case BOARD_ACL8216: if (it->options[4] == 1) devpriv->use_diff = 1; break; default: break; } n_subdevices = 1; /* all boardtypes have analog inputs */ if (board->n_aochan > 0) n_subdevices++; if (board->has_dio) n_subdevices += 2; ret = comedi_alloc_subdevices(dev, n_subdevices); if (ret) return ret; subdev = 0; /* Analog Input subdevice */ s = &dev->subdevices[subdev]; s->type = COMEDI_SUBD_AI; s->subdev_flags = SDF_READABLE; if (devpriv->use_diff) { s->subdev_flags |= SDF_DIFF; s->n_chan = board->n_aichan / 2; } else { s->subdev_flags |= SDF_GROUND; s->n_chan = board->n_aichan; } s->maxdata = board->has_16bit_ai ? 0xffff : 0x0fff; pcl812_set_ai_range_table(dev, s, it); s->insn_read = pcl812_ai_insn_read; if (dev->irq) { dev->read_subdev = s; s->subdev_flags |= SDF_CMD_READ; s->len_chanlist = MAX_CHANLIST_LEN; s->do_cmdtest = pcl812_ai_cmdtest; s->do_cmd = pcl812_ai_cmd; s->poll = pcl812_ai_poll; s->cancel = pcl812_ai_cancel; } devpriv->use_mpc508 = board->has_mpc508_mux; subdev++; /* analog output */ if (board->n_aochan > 0) { s = &dev->subdevices[subdev]; s->type = COMEDI_SUBD_AO; s->subdev_flags = SDF_WRITABLE | SDF_GROUND; s->n_chan = board->n_aochan; s->maxdata = 0xfff; switch (board->board_type) { case BOARD_A821: if (it->options[3] == 1) s->range_table = &range_unipolar10; else s->range_table = &range_unipolar5; break; case BOARD_PCL812: case BOARD_ACL8112: case BOARD_PCL812PG: case BOARD_ACL8216: switch (it->options[5]) { case 1: s->range_table = &range_unipolar10; break; case 2: s->range_table = &range_unknown; break; default: s->range_table = &range_unipolar5; break; } break; default: s->range_table = &range_unipolar5; break; } s->insn_write = pcl812_ao_insn_write; ret = comedi_alloc_subdev_readback(s); if (ret) return ret; subdev++; } if (board->has_dio) { /* Digital Input subdevice */ s = &dev->subdevices[subdev]; s->type = COMEDI_SUBD_DI; s->subdev_flags = SDF_READABLE; s->n_chan = 16; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = pcl812_di_insn_bits; subdev++; /* Digital Output subdevice */ s = &dev->subdevices[subdev]; s->type = COMEDI_SUBD_DO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 16; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = pcl812_do_insn_bits; subdev++; } switch (board->board_type) { case BOARD_ACL8216: case BOARD_PCL812PG: case BOARD_PCL812: case BOARD_ACL8112: devpriv->max_812_ai_mode0_rangewait = 1; if (it->options[3] > 0) /* we use external trigger */ devpriv->use_ext_trg = 1; break; case BOARD_A821: devpriv->max_812_ai_mode0_rangewait = 1; devpriv->mode_reg_int = (dev->irq << 4) & 0xf0; break; case BOARD_PCL813B: case BOARD_PCL813: case BOARD_ISO813: case BOARD_ACL8113: /* maybe there must by greatest timeout */ devpriv->max_812_ai_mode0_rangewait = 5; break; } pcl812_reset(dev); return 0; } static void pcl812_detach(struct comedi_device *dev) { pcl812_free_dma(dev); comedi_legacy_detach(dev); } static struct comedi_driver pcl812_driver = { .driver_name = "pcl812", .module = THIS_MODULE, .attach = pcl812_attach, .detach = pcl812_detach, .board_name = &boardtypes[0].name, .num_names = ARRAY_SIZE(boardtypes), .offset = sizeof(struct pcl812_board), }; module_comedi_driver(pcl812_driver); MODULE_AUTHOR("Comedi https://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL");