diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/adv_pci1720.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/adv_pci1720.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/adv_pci1720.c b/drivers/staging/comedi/drivers/adv_pci1720.c new file mode 100644 index 000000000000..4830a1c93d15 --- /dev/null +++ b/drivers/staging/comedi/drivers/adv_pci1720.c @@ -0,0 +1,195 @@ +/* + * COMEDI driver for Advantech PCI-1720U + * Copyright (c) 2015 H Hartley Sweeten <hsweeten@visionengravers.com> + * + * Separated from the adv_pci1710 driver written by: + * Michal Dobes <dobes@tesnet.cz> + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 2000 David A. Schleef <ds@schleef.org> + * + * 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: adv_pci1720 + * Description: 4-channel Isolated D/A Output board + * Devices: [Advantech] PCI-7120U (adv_pci1720) + * Author: H Hartley Sweeten <hsweeten@visionengravers.com> + * Updated: Fri, 29 Oct 2015 17:19:35 -0700 + * Status: untested + * + * Configuration options: not applicable, uses PCI auto config + * + * The PCI-1720 has 4 isolated 12-bit analog output channels with multiple + * output ranges. It also has a BoardID switch to allow differentiating + * multiple boards in the system. + * + * The analog outputs can operate in two modes, immediate and synchronized. + * This driver currently does not support the synchronized output mode. + * + * Jumpers JP1 to JP4 are used to set the current sink ranges for each + * analog output channel. In order to use the current sink ranges, the + * unipolar 5V range must be used. The voltage output and sink output for + * each channel is available on the connector as separate pins. + * + * Jumper JP5 controls the "hot" reset state of the analog outputs. + * Depending on its setting, the analog outputs will either keep the + * last settings and output values or reset to the default state after + * a "hot" reset. The default state for all channels is uniploar 5V range + * and all the output values are 0V. To allow this feature to work, the + * analog outputs are not "reset" when the driver attaches. + */ + +#include <linux/module.h> +#include <linux/delay.h> + +#include "../comedi_pci.h" + +/* + * PCI BAR2 Register map (dev->iobase) + */ +#define PCI1720_AO_LSB_REG(x) (0x00 + ((x) * 2)) +#define PCI1720_AO_MSB_REG(x) (0x01 + ((x) * 2)) +#define PCI1720_AO_RANGE_REG 0x08 +#define PCI1720_AO_RANGE(c, r) (((r) & 0x3) << ((c) * 2)) +#define PCI1720_AO_RANGE_MASK(c) PCI1720_AO_RANGE((c), 0x3) +#define PCI1720_SYNC_REG 0x09 +#define PCI1720_SYNC_CTRL_REG 0x0f +#define PCI1720_SYNC_CTRL_SC0 BIT(0) +#define PCI1720_BOARDID_REG 0x14 + +static const struct comedi_lrange pci1720_ao_range = { + 4, { + UNI_RANGE(5), + UNI_RANGE(10), + BIP_RANGE(5), + BIP_RANGE(10) + } +}; + +static int pci1720_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); + unsigned int val; + int i; + + /* set the channel range and polarity */ + val = inb(dev->iobase + PCI1720_AO_RANGE_REG); + val &= ~PCI1720_AO_RANGE_MASK(chan); + val |= PCI1720_AO_RANGE(chan, range); + outb(val, dev->iobase + PCI1720_AO_RANGE_REG); + + val = s->readback[chan]; + for (i = 0; i < insn->n; i++) { + val = data[i]; + + outb(val & 0xff, dev->iobase + PCI1720_AO_LSB_REG(chan)); + outb((val >> 8) & 0xff, dev->iobase + PCI1720_AO_MSB_REG(chan)); + + /* conversion time is 2us (500 kHz throughput) */ + usleep_range(2, 100); + } + + s->readback[chan] = val; + + return insn->n; +} + +static int pci1720_di_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + data[1] = inb(dev->iobase + PCI1720_BOARDID_REG); + + return insn->n; +} + +static int pci1720_auto_attach(struct comedi_device *dev, + unsigned long context) +{ + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + struct comedi_subdevice *s; + int ret; + + ret = comedi_pci_enable(dev); + if (ret) + return ret; + dev->iobase = pci_resource_start(pcidev, 2); + + ret = comedi_alloc_subdevices(dev, 2); + if (ret) + return ret; + + /* Analog Output subdevice */ + s = &dev->subdevices[0]; + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITABLE; + s->n_chan = 4; + s->maxdata = 0x0fff; + s->range_table = &pci1720_ao_range; + s->insn_write = pci1720_ao_insn_write; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + /* Digital Input subdevice (BoardID SW1) */ + s = &dev->subdevices[1]; + 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 = pci1720_di_insn_bits; + + /* disable synchronized output, channels update when written */ + outb(0, dev->iobase + PCI1720_SYNC_CTRL_REG); + + return 0; +} + +static struct comedi_driver adv_pci1720_driver = { + .driver_name = "adv_pci1720", + .module = THIS_MODULE, + .auto_attach = pci1720_auto_attach, + .detach = comedi_pci_detach, +}; + +static int adv_pci1720_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + return comedi_pci_auto_config(dev, &adv_pci1720_driver, + id->driver_data); +} + +static const struct pci_device_id adv_pci1720_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1720) }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, adv_pci1720_pci_table); + +static struct pci_driver adv_pci1720_pci_driver = { + .name = "adv_pci1720", + .id_table = adv_pci1720_pci_table, + .probe = adv_pci1720_pci_probe, + .remove = comedi_pci_auto_unconfig, +}; +module_comedi_pci_driver(adv_pci1720_driver, adv_pci1720_pci_driver); + +MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>"); +MODULE_DESCRIPTION("Comedi driver for Advantech PCI-1720 Analog Output board"); +MODULE_LICENSE("GPL"); |