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Linux Control and Measurement Device Interface * Copyright (C) 2000 David A. Schleef <ds@schleef.org> * Copyright (C) 2000 Chris R. Baugher <baugher@enteract.com> * Copyright (C) 2001,2002 Frank Mori Hess <fmhess@users.sourceforge.net> */ /* * Driver: das16 * Description: DAS16 compatible boards * Author: Sam Moore, Warren Jasper, ds, Chris Baugher, Frank Hess, Roman Fietze * Devices: [Keithley Metrabyte] DAS-16 (das-16), DAS-16G (das-16g), * DAS-16F (das-16f), DAS-1201 (das-1201), DAS-1202 (das-1202), * DAS-1401 (das-1401), DAS-1402 (das-1402), DAS-1601 (das-1601), * DAS-1602 (das-1602), * [ComputerBoards] PC104-DAS16/JR (pc104-das16jr), * PC104-DAS16JR/16 (pc104-das16jr/16), CIO-DAS16 (cio-das16), * CIO-DAS16F (cio-das16/f), CIO-DAS16/JR (cio-das16/jr), * CIO-DAS16JR/16 (cio-das16jr/16), CIO-DAS1401/12 (cio-das1401/12), * CIO-DAS1402/12 (cio-das1402/12), CIO-DAS1402/16 (cio-das1402/16), * CIO-DAS1601/12 (cio-das1601/12), CIO-DAS1602/12 (cio-das1602/12), * CIO-DAS1602/16 (cio-das1602/16), CIO-DAS16/330 (cio-das16/330) * Status: works * Updated: 2003-10-12 * * A rewrite of the das16 and das1600 drivers. * * Options: * [0] - base io address * [1] - irq (does nothing, irq is not used anymore) * [2] - dma channel (optional, required for comedi_command support) * [3] - master clock speed in MHz (optional, 1 or 10, ignored if * board can probe clock, defaults to 1) * [4] - analog input range lowest voltage in microvolts (optional, * only useful if your board does not have software * programmable gain) * [5] - analog input range highest voltage in microvolts (optional, * only useful if board does not have software programmable * gain) * [6] - analog output range lowest voltage in microvolts (optional) * [7] - analog output range highest voltage in microvolts (optional) * * Passing a zero for an option is the same as leaving it unspecified. */ /* * Testing and debugging help provided by Daniel Koch. * * Keithley Manuals: * 2309.PDF (das16) * 4919.PDF (das1400, 1600) * 4922.PDF (das-1400) * 4923.PDF (das1200, 1400, 1600) * * Computer boards manuals also available from their website * www.measurementcomputing.com */ #include <linux/module.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/comedi/comedidev.h> #include <linux/comedi/comedi_8255.h> #include <linux/comedi/comedi_8254.h> #include <linux/comedi/comedi_isadma.h> #define DAS16_DMA_SIZE 0xff00 /* size in bytes of allocated dma buffer */ /* * Register I/O map */ #define DAS16_TRIG_REG 0x00 #define DAS16_AI_LSB_REG 0x00 #define DAS16_AI_MSB_REG 0x01 #define DAS16_MUX_REG 0x02 #define DAS16_DIO_REG 0x03 #define DAS16_AO_LSB_REG(x) ((x) ? 0x06 : 0x04) #define DAS16_AO_MSB_REG(x) ((x) ? 0x07 : 0x05) #define DAS16_STATUS_REG 0x08 #define DAS16_STATUS_BUSY BIT(7) #define DAS16_STATUS_UNIPOLAR BIT(6) #define DAS16_STATUS_MUXBIT BIT(5) #define DAS16_STATUS_INT BIT(4) #define DAS16_CTRL_REG 0x09 #define DAS16_CTRL_INTE BIT(7) #define DAS16_CTRL_IRQ(x) (((x) & 0x7) << 4) #define DAS16_CTRL_DMAE BIT(2) #define DAS16_CTRL_PACING_MASK (3 << 0) #define DAS16_CTRL_INT_PACER (3 << 0) #define DAS16_CTRL_EXT_PACER (2 << 0) #define DAS16_CTRL_SOFT_PACER (0 << 0) #define DAS16_PACER_REG 0x0a #define DAS16_PACER_BURST_LEN(x) (((x) & 0xf) << 4) #define DAS16_PACER_CTR0 BIT(1) #define DAS16_PACER_TRIG0 BIT(0) #define DAS16_GAIN_REG 0x0b #define DAS16_TIMER_BASE_REG 0x0c /* to 0x0f */ #define DAS1600_CONV_REG 0x404 #define DAS1600_CONV_DISABLE BIT(6) #define DAS1600_BURST_REG 0x405 #define DAS1600_BURST_VAL BIT(6) #define DAS1600_ENABLE_REG 0x406 #define DAS1600_ENABLE_VAL BIT(6) #define DAS1600_STATUS_REG 0x407 #define DAS1600_STATUS_BME BIT(6) #define DAS1600_STATUS_ME BIT(5) #define DAS1600_STATUS_CD BIT(4) #define DAS1600_STATUS_WS BIT(1) #define DAS1600_STATUS_CLK_10MHZ BIT(0) static const struct comedi_lrange range_das1x01_bip = { 4, { BIP_RANGE(10), BIP_RANGE(1), BIP_RANGE(0.1), BIP_RANGE(0.01) } }; static const struct comedi_lrange range_das1x01_unip = { 4, { UNI_RANGE(10), UNI_RANGE(1), UNI_RANGE(0.1), UNI_RANGE(0.01) } }; static const struct comedi_lrange range_das1x02_bip = { 4, { BIP_RANGE(10), BIP_RANGE(5), BIP_RANGE(2.5), BIP_RANGE(1.25) } }; static const struct comedi_lrange range_das1x02_unip = { 4, { UNI_RANGE(10), UNI_RANGE(5), UNI_RANGE(2.5), UNI_RANGE(1.25) } }; static const struct comedi_lrange range_das16jr = { 9, { BIP_RANGE(10), 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) } }; static const struct comedi_lrange range_das16jr_16 = { 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) } }; static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 }; static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 }; static const int das1600_gainlist[] = { 0, 1, 2, 3 }; enum { das16_pg_none = 0, das16_pg_16jr, das16_pg_16jr_16, das16_pg_1601, das16_pg_1602, }; static const int *const das16_gainlists[] = { NULL, das16jr_gainlist, das16jr_16_gainlist, das1600_gainlist, das1600_gainlist, }; static const struct comedi_lrange *const das16_ai_uni_lranges[] = { &range_unknown, &range_das16jr, &range_das16jr_16, &range_das1x01_unip, &range_das1x02_unip, }; static const struct comedi_lrange *const das16_ai_bip_lranges[] = { &range_unknown, &range_das16jr, &range_das16jr_16, &range_das1x01_bip, &range_das1x02_bip, }; struct das16_board { const char *name; unsigned int ai_maxdata; unsigned int ai_speed; /* max conversion speed in nanosec */ unsigned int ai_pg; unsigned int has_ao:1; unsigned int has_8255:1; unsigned int i8255_offset; unsigned int size; unsigned int id; }; static const struct das16_board das16_boards[] = { { .name = "das-16", .ai_maxdata = 0x0fff, .ai_speed = 15000, .ai_pg = das16_pg_none, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x10, .size = 0x14, .id = 0x00, }, { .name = "das-16g", .ai_maxdata = 0x0fff, .ai_speed = 15000, .ai_pg = das16_pg_none, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x10, .size = 0x14, .id = 0x00, }, { .name = "das-16f", .ai_maxdata = 0x0fff, .ai_speed = 8500, .ai_pg = das16_pg_none, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x10, .size = 0x14, .id = 0x00, }, { .name = "cio-das16", .ai_maxdata = 0x0fff, .ai_speed = 20000, .ai_pg = das16_pg_none, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x10, .size = 0x14, .id = 0x80, }, { .name = "cio-das16/f", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_none, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x10, .size = 0x14, .id = 0x80, }, { .name = "cio-das16/jr", .ai_maxdata = 0x0fff, .ai_speed = 7692, .ai_pg = das16_pg_16jr, .size = 0x10, .id = 0x00, }, { .name = "pc104-das16jr", .ai_maxdata = 0x0fff, .ai_speed = 3300, .ai_pg = das16_pg_16jr, .size = 0x10, .id = 0x00, }, { .name = "cio-das16jr/16", .ai_maxdata = 0xffff, .ai_speed = 10000, .ai_pg = das16_pg_16jr_16, .size = 0x10, .id = 0x00, }, { .name = "pc104-das16jr/16", .ai_maxdata = 0xffff, .ai_speed = 10000, .ai_pg = das16_pg_16jr_16, .size = 0x10, .id = 0x00, }, { .name = "das-1201", .ai_maxdata = 0x0fff, .ai_speed = 20000, .ai_pg = das16_pg_none, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0x20, }, { .name = "das-1202", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_none, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0x20, }, { .name = "das-1401", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_1601, .size = 0x408, .id = 0xc0, }, { .name = "das-1402", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_1602, .size = 0x408, .id = 0xc0, }, { .name = "das-1601", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_1601, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0xc0, }, { .name = "das-1602", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_1602, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1401/12", .ai_maxdata = 0x0fff, .ai_speed = 6250, .ai_pg = das16_pg_1601, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1402/12", .ai_maxdata = 0x0fff, .ai_speed = 6250, .ai_pg = das16_pg_1602, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1402/16", .ai_maxdata = 0xffff, .ai_speed = 10000, .ai_pg = das16_pg_1602, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1601/12", .ai_maxdata = 0x0fff, .ai_speed = 6250, .ai_pg = das16_pg_1601, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1602/12", .ai_maxdata = 0x0fff, .ai_speed = 10000, .ai_pg = das16_pg_1602, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0xc0, }, { .name = "cio-das1602/16", .ai_maxdata = 0xffff, .ai_speed = 10000, .ai_pg = das16_pg_1602, .has_ao = 1, .has_8255 = 1, .i8255_offset = 0x400, .size = 0x408, .id = 0xc0, }, { .name = "cio-das16/330", .ai_maxdata = 0x0fff, .ai_speed = 3030, .ai_pg = das16_pg_16jr, .size = 0x14, .id = 0xf0, }, }; /* * Period for timer interrupt in jiffies. It's a function * to deal with possibility of dynamic HZ patches */ static inline int timer_period(void) { return HZ / 20; } struct das16_private_struct { struct comedi_isadma *dma; struct comedi_device *dev; unsigned int clockbase; unsigned int ctrl_reg; unsigned int divisor1; unsigned int divisor2; struct timer_list timer; unsigned long extra_iobase; unsigned int can_burst:1; unsigned int timer_running:1; }; static void das16_ai_setup_dma(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int unread_samples) { struct das16_private_struct *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; /* * 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 das16_interrupt(struct comedi_device *dev) { struct das16_private_struct *devpriv = dev->private; struct comedi_subdevice *s = dev->read_subdev; struct comedi_async *async = s->async; struct comedi_cmd *cmd = &async->cmd; struct comedi_isadma *dma = devpriv->dma; struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma]; unsigned long spin_flags; unsigned int residue; unsigned int nbytes; unsigned int nsamples; spin_lock_irqsave(&dev->spinlock, spin_flags); if (!(devpriv->ctrl_reg & DAS16_CTRL_DMAE)) { spin_unlock_irqrestore(&dev->spinlock, spin_flags); return; } /* * The pc104-das16jr (at least) has problems if the dma * transfer is interrupted in the middle of transferring * a 16 bit sample. */ residue = comedi_isadma_disable_on_sample(desc->chan, comedi_bytes_per_sample(s)); /* figure out how many samples to read */ if (residue > desc->size) { dev_err(dev->class_dev, "residue > transfer size!\n"); async->events |= COMEDI_CB_ERROR; nbytes = 0; } else { nbytes = desc->size - residue; } nsamples = comedi_bytes_to_samples(s, nbytes); /* restart DMA if more samples are needed */ if (nsamples) { dma->cur_dma = 1 - dma->cur_dma; das16_ai_setup_dma(dev, s, nsamples); } spin_unlock_irqrestore(&dev->spinlock, spin_flags); comedi_buf_write_samples(s, desc->virt_addr, nsamples); if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg) async->events |= COMEDI_CB_EOA; comedi_handle_events(dev, s); } static void das16_timer_interrupt(struct timer_list *t) { struct das16_private_struct *devpriv = from_timer(devpriv, t, timer); struct comedi_device *dev = devpriv->dev; unsigned long flags; das16_interrupt(dev); spin_lock_irqsave(&dev->spinlock, flags); if (devpriv->timer_running) mod_timer(&devpriv->timer, jiffies + timer_period()); spin_unlock_irqrestore(&dev->spinlock, flags); } static void das16_ai_set_mux_range(struct comedi_device *dev, unsigned int first_chan, unsigned int last_chan, unsigned int range) { const struct das16_board *board = dev->board_ptr; /* set multiplexer */ outb(first_chan | (last_chan << 4), dev->iobase + DAS16_MUX_REG); /* some boards do not have programmable gain */ if (board->ai_pg == das16_pg_none) return; /* * Set gain (this is also burst rate register but according to * computer boards manual, burst rate does nothing, even on * keithley cards). */ outb((das16_gainlists[board->ai_pg])[range], dev->iobase + DAS16_GAIN_REG); } static int das16_ai_check_chanlist(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); unsigned int range0 = CR_RANGE(cmd->chanlist[0]); int i; for (i = 1; i < cmd->chanlist_len; i++) { unsigned int chan = CR_CHAN(cmd->chanlist[i]); unsigned int range = CR_RANGE(cmd->chanlist[i]); if (chan != ((chan0 + i) % s->n_chan)) { dev_dbg(dev->class_dev, "entries in chanlist must be consecutive channels, counting upwards\n"); return -EINVAL; } if (range != range0) { dev_dbg(dev->class_dev, "entries in chanlist must all have the same gain\n"); return -EINVAL; } } return 0; } static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { const struct das16_board *board = dev->board_ptr; struct das16_private_struct *devpriv = dev->private; int err = 0; unsigned int trig_mask; unsigned int arg; /* Step 1 : check if triggers are trivially valid */ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); trig_mask = TRIG_FOLLOW; if (devpriv->can_burst) trig_mask |= TRIG_TIMER | TRIG_EXT; err |= comedi_check_trigger_src(&cmd->scan_begin_src, trig_mask); trig_mask = TRIG_TIMER | TRIG_EXT; if (devpriv->can_burst) trig_mask |= TRIG_NOW; err |= comedi_check_trigger_src(&cmd->convert_src, trig_mask); 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->scan_begin_src); err |= comedi_check_trigger_is_unique(cmd->convert_src); err |= comedi_check_trigger_is_unique(cmd->stop_src); /* Step 2b : and mutually compatible */ /* make sure scan_begin_src and convert_src don't conflict */ if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW) err |= -EINVAL; if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW) err |= -EINVAL; if (err) return 2; /* Step 3: check if arguments are trivially valid */ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len); /* check against maximum frequency */ if (cmd->scan_begin_src == TRIG_TIMER) { err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, board->ai_speed * cmd->chanlist_len); } if (cmd->convert_src == TRIG_TIMER) { err |= comedi_check_trigger_arg_min(&cmd->convert_arg, board->ai_speed); } 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 arguments */ if (cmd->scan_begin_src == TRIG_TIMER) { arg = cmd->scan_begin_arg; comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg); } if (cmd->convert_src == TRIG_TIMER) { 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: check channel list if it exists */ if (cmd->chanlist && cmd->chanlist_len > 0) err |= das16_ai_check_chanlist(dev, s, cmd); if (err) return 5; return 0; } static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns, unsigned int flags) { comedi_8254_cascade_ns_to_timer(dev->pacer, &ns, flags); comedi_8254_update_divisors(dev->pacer); comedi_8254_pacer_enable(dev->pacer, 1, 2, true); return ns; } static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s) { struct das16_private_struct *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; struct comedi_async *async = s->async; struct comedi_cmd *cmd = &async->cmd; unsigned int first_chan = CR_CHAN(cmd->chanlist[0]); unsigned int last_chan = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]); unsigned int range = CR_RANGE(cmd->chanlist[0]); unsigned int byte; unsigned long flags; if (cmd->flags & CMDF_PRIORITY) { dev_err(dev->class_dev, "isa dma transfers cannot be performed with CMDF_PRIORITY, aborting\n"); return -1; } if (devpriv->can_burst) outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV_REG); /* set mux and range for chanlist scan */ das16_ai_set_mux_range(dev, first_chan, last_chan, range); /* set counter mode and counts */ cmd->convert_arg = das16_set_pacer(dev, cmd->convert_arg, cmd->flags); /* enable counters */ byte = 0; if (devpriv->can_burst) { if (cmd->convert_src == TRIG_NOW) { outb(DAS1600_BURST_VAL, dev->iobase + DAS1600_BURST_REG); /* set burst length */ byte |= DAS16_PACER_BURST_LEN(cmd->chanlist_len - 1); } else { outb(0, dev->iobase + DAS1600_BURST_REG); } } outb(byte, dev->iobase + DAS16_PACER_REG); /* set up dma transfer */ dma->cur_dma = 0; das16_ai_setup_dma(dev, s, 0); /* set up timer */ spin_lock_irqsave(&dev->spinlock, flags); devpriv->timer_running = 1; devpriv->timer.expires = jiffies + timer_period(); add_timer(&devpriv->timer); /* enable DMA interrupt with external or internal pacing */ devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_PACING_MASK); devpriv->ctrl_reg |= DAS16_CTRL_DMAE; if (cmd->convert_src == TRIG_EXT) devpriv->ctrl_reg |= DAS16_CTRL_EXT_PACER; else devpriv->ctrl_reg |= DAS16_CTRL_INT_PACER; outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG); if (devpriv->can_burst) outb(0, dev->iobase + DAS1600_CONV_REG); spin_unlock_irqrestore(&dev->spinlock, flags); return 0; } static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { struct das16_private_struct *devpriv = dev->private; struct comedi_isadma *dma = devpriv->dma; unsigned long flags; spin_lock_irqsave(&dev->spinlock, flags); /* disable interrupts, dma and pacer clocked conversions */ devpriv->ctrl_reg &= ~(DAS16_CTRL_INTE | DAS16_CTRL_DMAE | DAS16_CTRL_PACING_MASK); outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG); comedi_isadma_disable(dma->chan); /* disable SW timer */ if (devpriv->timer_running) { devpriv->timer_running = 0; del_timer(&devpriv->timer); } if (devpriv->can_burst) outb(0, dev->iobase + DAS1600_BURST_REG); spin_unlock_irqrestore(&dev->spinlock, flags); return 0; } static void das16_ai_munge(struct comedi_device *dev, struct comedi_subdevice *s, void *array, unsigned int num_bytes, unsigned int start_chan_index) { unsigned short *data = array; unsigned int num_samples = comedi_bytes_to_samples(s, num_bytes); unsigned int i; __le16 *buf = array; for (i = 0; i < num_samples; i++) { data[i] = le16_to_cpu(buf[i]); if (s->maxdata == 0x0fff) data[i] >>= 4; data[i] &= s->maxdata; } } static int das16_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { unsigned int status; status = inb(dev->iobase + DAS16_STATUS_REG); if ((status & DAS16_STATUS_BUSY) == 0) return 0; return -EBUSY; } static int das16_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); unsigned int val; int ret; int i; /* set mux and range for single channel */ das16_ai_set_mux_range(dev, chan, chan, range); for (i = 0; i < insn->n; i++) { /* trigger conversion */ outb_p(0, dev->iobase + DAS16_TRIG_REG); ret = comedi_timeout(dev, s, insn, das16_ai_eoc, 0); if (ret) return ret; val = inb(dev->iobase + DAS16_AI_MSB_REG) << 8; val |= inb(dev->iobase + DAS16_AI_LSB_REG); if (s->maxdata == 0x0fff) val >>= 4; val &= s->maxdata; data[i] = val; } return insn->n; } static int das16_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); int i; for (i = 0; i < insn->n; i++) { unsigned int val = data[i]; s->readback[chan] = val; val <<= 4; outb(val & 0xff, dev->iobase + DAS16_AO_LSB_REG(chan)); outb((val >> 8) & 0xff, dev->iobase + DAS16_AO_MSB_REG(chan)); } return insn->n; } static int das16_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { data[1] = inb(dev->iobase + DAS16_DIO_REG) & 0xf; return insn->n; } static int das16_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, dev->iobase + DAS16_DIO_REG); data[1] = s->state; return insn->n; } static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it) { const struct das16_board *board = dev->board_ptr; int diobits; /* diobits indicates boards */ diobits = inb(dev->iobase + DAS16_DIO_REG) & 0xf0; if (board->id != diobits) { dev_err(dev->class_dev, "requested board's id bits are incorrect (0x%x != 0x%x)\n", board->id, diobits); return -EINVAL; } return 0; } static void das16_reset(struct comedi_device *dev) { outb(0, dev->iobase + DAS16_STATUS_REG); outb(0, dev->iobase + DAS16_CTRL_REG); outb(0, dev->iobase + DAS16_PACER_REG); } static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) { struct das16_private_struct *devpriv = dev->private; timer_setup(&devpriv->timer, das16_timer_interrupt, 0); /* only DMA channels 3 and 1 are valid */ if (!(dma_chan == 1 || dma_chan == 3)) return; /* DMA uses two buffers */ devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan, DAS16_DMA_SIZE, COMEDI_ISADMA_READ); } static void das16_free_dma(struct comedi_device *dev) { struct das16_private_struct *devpriv = dev->private; if (devpriv) { del_timer_sync(&devpriv->timer); comedi_isadma_free(devpriv->dma); } } static const struct comedi_lrange *das16_ai_range(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_devconfig *it, unsigned int pg_type, unsigned int status) { unsigned int min = it->options[4]; unsigned int max = it->options[5]; /* get any user-defined input range */ if (pg_type == das16_pg_none && (min || max)) { struct comedi_lrange *lrange; struct comedi_krange *krange; /* allocate single-range range table */ lrange = comedi_alloc_spriv(s, struct_size(lrange, range, 1)); if (!lrange) return &range_unknown; /* initialize ai range */ lrange->length = 1; krange = lrange->range; krange->min = min; krange->max = max; krange->flags = UNIT_volt; return lrange; } /* use software programmable range */ if (status & DAS16_STATUS_UNIPOLAR) return das16_ai_uni_lranges[pg_type]; return das16_ai_bip_lranges[pg_type]; } static const struct comedi_lrange *das16_ao_range(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_devconfig *it) { unsigned int min = it->options[6]; unsigned int max = it->options[7]; /* get any user-defined output range */ if (min || max) { struct comedi_lrange *lrange; struct comedi_krange *krange; /* allocate single-range range table */ lrange = comedi_alloc_spriv(s, struct_size(lrange, range, 1)); if (!lrange) return &range_unknown; /* initialize ao range */ lrange->length = 1; krange = lrange->range; krange->min = min; krange->max = max; krange->flags = UNIT_volt; return lrange; } return &range_unknown; } static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it) { const struct das16_board *board = dev->board_ptr; struct das16_private_struct *devpriv; struct comedi_subdevice *s; unsigned int osc_base; unsigned int status; int ret; /* check that clock setting is valid */ if (it->options[3]) { if (it->options[3] != 1 && it->options[3] != 10) { dev_err(dev->class_dev, "Invalid option. Master clock must be set to 1 or 10 (MHz)\n"); return -EINVAL; } } devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; devpriv->dev = dev; if (board->size < 0x400) { ret = comedi_request_region(dev, it->options[0], board->size); if (ret) return ret; } else { ret = comedi_request_region(dev, it->options[0], 0x10); if (ret) return ret; /* Request an additional region for the 8255 */ ret = __comedi_request_region(dev, dev->iobase + 0x400, board->size & 0x3ff); if (ret) return ret; devpriv->extra_iobase = dev->iobase + 0x400; devpriv->can_burst = 1; } /* probe id bits to make sure they are consistent */ if (das16_probe(dev, it)) return -EINVAL; /* get master clock speed */ osc_base = I8254_OSC_BASE_1MHZ; if (devpriv->can_burst) { status = inb(dev->iobase + DAS1600_STATUS_REG); if (status & DAS1600_STATUS_CLK_10MHZ) osc_base = I8254_OSC_BASE_10MHZ; } else { if (it->options[3]) osc_base = I8254_OSC_BASE_1MHZ / it->options[3]; } dev->pacer = comedi_8254_io_alloc(dev->iobase + DAS16_TIMER_BASE_REG, osc_base, I8254_IO8, 0); if (IS_ERR(dev->pacer)) return PTR_ERR(dev->pacer); das16_alloc_dma(dev, it->options[2]); ret = comedi_alloc_subdevices(dev, 4 + board->has_8255); if (ret) return ret; status = inb(dev->iobase + DAS16_STATUS_REG); /* Analog Input subdevice */ s = &dev->subdevices[0]; s->type = COMEDI_SUBD_AI; s->subdev_flags = SDF_READABLE; if (status & DAS16_STATUS_MUXBIT) { s->subdev_flags |= SDF_GROUND; s->n_chan = 16; } else { s->subdev_flags |= SDF_DIFF; s->n_chan = 8; } s->len_chanlist = s->n_chan; s->maxdata = board->ai_maxdata; s->range_table = das16_ai_range(dev, s, it, board->ai_pg, status); s->insn_read = das16_ai_insn_read; if (devpriv->dma) { dev->read_subdev = s; s->subdev_flags |= SDF_CMD_READ; s->do_cmdtest = das16_cmd_test; s->do_cmd = das16_cmd_exec; s->cancel = das16_cancel; s->munge = das16_ai_munge; } /* Analog Output subdevice */ s = &dev->subdevices[1]; if (board->has_ao) { s->type = COMEDI_SUBD_AO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 2; s->maxdata = 0x0fff; s->range_table = das16_ao_range(dev, s, it); s->insn_write = das16_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 = 4; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = das16_di_insn_bits; /* Digital Output subdevice */ s = &dev->subdevices[3]; s->type = COMEDI_SUBD_DO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 4; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = das16_do_insn_bits; /* initialize digital output lines */ outb(s->state, dev->iobase + DAS16_DIO_REG); /* 8255 Digital I/O subdevice */ if (board->has_8255) { s = &dev->subdevices[4]; ret = subdev_8255_io_init(dev, s, board->i8255_offset); if (ret) return ret; } das16_reset(dev); /* set the interrupt level */ devpriv->ctrl_reg = DAS16_CTRL_IRQ(dev->irq); outb(devpriv->ctrl_reg, dev->iobase + DAS16_CTRL_REG); if (devpriv->can_burst) { outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE_REG); outb(0, dev->iobase + DAS1600_CONV_REG); outb(0, dev->iobase + DAS1600_BURST_REG); } return 0; } static void das16_detach(struct comedi_device *dev) { const struct das16_board *board = dev->board_ptr; struct das16_private_struct *devpriv = dev->private; if (devpriv) { if (dev->iobase) das16_reset(dev); das16_free_dma(dev); if (devpriv->extra_iobase) release_region(devpriv->extra_iobase, board->size & 0x3ff); } comedi_legacy_detach(dev); } static struct comedi_driver das16_driver = { .driver_name = "das16", .module = THIS_MODULE, .attach = das16_attach, .detach = das16_detach, .board_name = &das16_boards[0].name, .num_names = ARRAY_SIZE(das16_boards), .offset = sizeof(das16_boards[0]), }; module_comedi_driver(das16_driver); MODULE_AUTHOR("Comedi https://www.comedi.org"); MODULE_DESCRIPTION("Comedi driver for DAS16 compatible boards"); MODULE_LICENSE("GPL"); |