X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fstaging%2Fcomedi%2Fdrivers%2Fpcl726.c;fp=kernel%2Fdrivers%2Fstaging%2Fcomedi%2Fdrivers%2Fpcl726.c;h=256850ccb6fa21d09389ed3ae341171716fb633c;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/staging/comedi/drivers/pcl726.c b/kernel/drivers/staging/comedi/drivers/pcl726.c new file mode 100644 index 000000000..256850ccb --- /dev/null +++ b/kernel/drivers/staging/comedi/drivers/pcl726.c @@ -0,0 +1,432 @@ +/* + * pcl726.c + * Comedi driver for 6/12-Channel D/A Output and DIO cards + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 1998 David A. Schleef + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * Driver: pcl726 + * Description: Advantech PCL-726 & compatibles + * Author: David A. Schleef + * Status: untested + * Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728), + * [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128) + * + * Configuration Options: + * [0] - IO Base + * [1] - IRQ (ACL-6126 only) + * [2] - D/A output range for channel 0 + * [3] - D/A output range for channel 1 + * + * Boards with > 2 analog output channels: + * [4] - D/A output range for channel 2 + * [5] - D/A output range for channel 3 + * [6] - D/A output range for channel 4 + * [7] - D/A output range for channel 5 + * + * Boards with > 6 analog output channels: + * [8] - D/A output range for channel 6 + * [9] - D/A output range for channel 7 + * [10] - D/A output range for channel 8 + * [11] - D/A output range for channel 9 + * [12] - D/A output range for channel 10 + * [13] - D/A output range for channel 11 + * + * For PCL-726 the D/A output ranges are: + * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: unknown + * + * For PCL-727: + * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: 4-20mA + * + * For PCL-728 and ACL-6128: + * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: 0-20mA + * + * For ACL-6126: + * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA + */ + +#include +#include + +#include "../comedidev.h" + +#define PCL726_AO_MSB_REG(x) (0x00 + ((x) * 2)) +#define PCL726_AO_LSB_REG(x) (0x01 + ((x) * 2)) +#define PCL726_DO_MSB_REG 0x0c +#define PCL726_DO_LSB_REG 0x0d +#define PCL726_DI_MSB_REG 0x0e +#define PCL726_DI_LSB_REG 0x0f + +#define PCL727_DI_MSB_REG 0x00 +#define PCL727_DI_LSB_REG 0x01 +#define PCL727_DO_MSB_REG 0x18 +#define PCL727_DO_LSB_REG 0x19 + +static const struct comedi_lrange *const rangelist_726[] = { + &range_unipolar5, + &range_unipolar10, + &range_bipolar5, + &range_bipolar10, + &range_4_20mA, + &range_unknown +}; + +static const struct comedi_lrange *const rangelist_727[] = { + &range_unipolar5, + &range_unipolar10, + &range_bipolar5, + &range_4_20mA +}; + +static const struct comedi_lrange *const rangelist_728[] = { + &range_unipolar5, + &range_unipolar10, + &range_bipolar5, + &range_bipolar10, + &range_4_20mA, + &range_0_20mA +}; + +struct pcl726_board { + const char *name; + unsigned long io_len; + unsigned int irq_mask; + const struct comedi_lrange *const *ao_ranges; + int ao_num_ranges; + int ao_nchan; + unsigned int have_dio:1; + unsigned int is_pcl727:1; +}; + +static const struct pcl726_board pcl726_boards[] = { + { + .name = "pcl726", + .io_len = 0x10, + .ao_ranges = &rangelist_726[0], + .ao_num_ranges = ARRAY_SIZE(rangelist_726), + .ao_nchan = 6, + .have_dio = 1, + }, { + .name = "pcl727", + .io_len = 0x20, + .ao_ranges = &rangelist_727[0], + .ao_num_ranges = ARRAY_SIZE(rangelist_727), + .ao_nchan = 12, + .have_dio = 1, + .is_pcl727 = 1, + }, { + .name = "pcl728", + .io_len = 0x08, + .ao_num_ranges = ARRAY_SIZE(rangelist_728), + .ao_ranges = &rangelist_728[0], + .ao_nchan = 2, + }, { + .name = "acl6126", + .io_len = 0x10, + .irq_mask = 0x96e8, + .ao_num_ranges = ARRAY_SIZE(rangelist_726), + .ao_ranges = &rangelist_726[0], + .ao_nchan = 6, + .have_dio = 1, + }, { + .name = "acl6128", + .io_len = 0x08, + .ao_num_ranges = ARRAY_SIZE(rangelist_728), + .ao_ranges = &rangelist_728[0], + .ao_nchan = 2, + }, +}; + +struct pcl726_private { + const struct comedi_lrange *rangelist[12]; + unsigned int cmd_running:1; +}; + +static int pcl726_intr_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + data[1] = 0; + return insn->n; +} + +static int pcl726_intr_cmdtest(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + int err = 0; + + /* Step 1 : check if triggers are trivially valid */ + + err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW); + err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT); + err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW); + err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); + err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE); + + if (err) + return 1; + + /* Step 2a : make sure trigger sources are unique */ + /* Step 2b : and mutually compatible */ + + /* 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); + err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0); + err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, + cmd->chanlist_len); + err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); + + if (err) + return 3; + + /* Step 4: fix up any arguments */ + + /* Step 5: check channel list if it exists */ + + return 0; +} + +static int pcl726_intr_cmd(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct pcl726_private *devpriv = dev->private; + + devpriv->cmd_running = 1; + + return 0; +} + +static int pcl726_intr_cancel(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct pcl726_private *devpriv = dev->private; + + devpriv->cmd_running = 0; + + return 0; +} + +static irqreturn_t pcl726_interrupt(int irq, void *d) +{ + struct comedi_device *dev = d; + struct comedi_subdevice *s = dev->read_subdev; + struct pcl726_private *devpriv = dev->private; + + if (devpriv->cmd_running) { + pcl726_intr_cancel(dev, s); + + comedi_buf_write_samples(s, &s->state, 1); + comedi_handle_events(dev, s); + } + + return IRQ_HANDLED; +} + +static int pcl726_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 range = CR_RANGE(insn->chanspec); + int i; + + for (i = 0; i < insn->n; i++) { + unsigned int val = data[i]; + + s->readback[chan] = val; + + /* bipolar data to the DAC is two's complement */ + if (comedi_chan_range_is_bipolar(s, chan, range)) + val = comedi_offset_munge(s, val); + + /* order is important, MSB then LSB */ + outb((val >> 8) & 0xff, dev->iobase + PCL726_AO_MSB_REG(chan)); + outb(val & 0xff, dev->iobase + PCL726_AO_LSB_REG(chan)); + } + + return insn->n; +} + +static int pcl726_di_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + const struct pcl726_board *board = dev->board_ptr; + unsigned int val; + + if (board->is_pcl727) { + val = inb(dev->iobase + PCL727_DI_LSB_REG); + val |= (inb(dev->iobase + PCL727_DI_MSB_REG) << 8); + } else { + val = inb(dev->iobase + PCL726_DI_LSB_REG); + val |= (inb(dev->iobase + PCL726_DI_MSB_REG) << 8); + } + + data[1] = val; + + return insn->n; +} + +static int pcl726_do_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + const struct pcl726_board *board = dev->board_ptr; + unsigned long io = dev->iobase; + unsigned int mask; + + mask = comedi_dio_update_state(s, data); + if (mask) { + if (board->is_pcl727) { + if (mask & 0x00ff) + outb(s->state & 0xff, io + PCL727_DO_LSB_REG); + if (mask & 0xff00) + outb((s->state >> 8), io + PCL727_DO_MSB_REG); + } else { + if (mask & 0x00ff) + outb(s->state & 0xff, io + PCL726_DO_LSB_REG); + if (mask & 0xff00) + outb((s->state >> 8), io + PCL726_DO_MSB_REG); + } + } + + data[1] = s->state; + + return insn->n; +} + +static int pcl726_attach(struct comedi_device *dev, + struct comedi_devconfig *it) +{ + const struct pcl726_board *board = dev->board_ptr; + struct pcl726_private *devpriv; + struct comedi_subdevice *s; + int subdev; + int ret; + int i; + + ret = comedi_request_region(dev, it->options[0], board->io_len); + if (ret) + return ret; + + devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); + if (!devpriv) + return -ENOMEM; + + /* + * Hook up the external trigger source interrupt only if the + * user config option is valid and the board supports interrupts. + */ + if (it->options[1] && (board->irq_mask & (1 << it->options[1]))) { + ret = request_irq(it->options[1], pcl726_interrupt, 0, + dev->board_name, dev); + if (ret == 0) { + /* External trigger source is from Pin-17 of CN3 */ + dev->irq = it->options[1]; + } + } + + /* setup the per-channel analog output range_table_list */ + for (i = 0; i < 12; i++) { + unsigned int opt = it->options[2 + i]; + + if (opt < board->ao_num_ranges && i < board->ao_nchan) + devpriv->rangelist[i] = board->ao_ranges[opt]; + else + devpriv->rangelist[i] = &range_unknown; + } + + subdev = board->have_dio ? 3 : 1; + if (dev->irq) + subdev++; + ret = comedi_alloc_subdevices(dev, subdev); + if (ret) + return ret; + + subdev = 0; + + /* Analog Output subdevice */ + s = &dev->subdevices[subdev++]; + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITABLE | SDF_GROUND; + s->n_chan = board->ao_nchan; + s->maxdata = 0x0fff; + s->range_table_list = devpriv->rangelist; + s->insn_write = pcl726_ao_insn_write; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + if (board->have_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->insn_bits = pcl726_di_insn_bits; + s->range_table = &range_digital; + + /* 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->insn_bits = pcl726_do_insn_bits; + s->range_table = &range_digital; + } + + if (dev->irq) { + /* Digial Input subdevice - Interrupt support */ + s = &dev->subdevices[subdev++]; + dev->read_subdev = s; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE | SDF_CMD_READ; + s->n_chan = 1; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = pcl726_intr_insn_bits; + s->len_chanlist = 1; + s->do_cmdtest = pcl726_intr_cmdtest; + s->do_cmd = pcl726_intr_cmd; + s->cancel = pcl726_intr_cancel; + } + + return 0; +} + +static struct comedi_driver pcl726_driver = { + .driver_name = "pcl726", + .module = THIS_MODULE, + .attach = pcl726_attach, + .detach = comedi_legacy_detach, + .board_name = &pcl726_boards[0].name, + .num_names = ARRAY_SIZE(pcl726_boards), + .offset = sizeof(struct pcl726_board), +}; +module_comedi_driver(pcl726_driver); + +MODULE_AUTHOR("Comedi http://www.comedi.org"); +MODULE_DESCRIPTION("Comedi driver for Advantech PCL-726 & compatibles"); +MODULE_LICENSE("GPL");