diff options
Diffstat (limited to 'drivers/comedi/drivers/adv_pci1724.c')
| -rw-r--r-- | drivers/comedi/drivers/adv_pci1724.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/adv_pci1724.c b/drivers/comedi/drivers/adv_pci1724.c new file mode 100644 index 000000000000..e8ab573c839f --- /dev/null +++ b/drivers/comedi/drivers/adv_pci1724.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * adv_pci1724.c + * Comedi driver for the Advantech PCI-1724U card. + * + * Author: Frank Mori Hess <fmh6jj@gmail.com> + * Copyright (C) 2013 GnuBIO Inc + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 1997-8 David A. Schleef <ds@schleef.org> + */ + +/* + * Driver: adv_pci1724 + * Description: Advantech PCI-1724U + * Devices: [Advantech] PCI-1724U (adv_pci1724) + * Author: Frank Mori Hess <fmh6jj@gmail.com> + * Updated: 2013-02-09 + * Status: works + * + * Configuration Options: not applicable, uses comedi PCI auto config + * + * Subdevice 0 is the analog output. + * Subdevice 1 is the offset calibration for the analog output. + * Subdevice 2 is the gain calibration for the analog output. + * + * The calibration offset and gains have quite a large effect on the + * analog output, so it is possible to adjust the analog output to + * have an output range significantly different from the board's + * nominal output ranges. For a calibrated +/-10V range, the analog + * output's offset will be set somewhere near mid-range (0x2000) and + * its gain will be near maximum (0x3fff). + * + * There is really no difference between the board's documented 0-20mA + * versus 4-20mA output ranges. To pick one or the other is simply a + * matter of adjusting the offset and gain calibration until the board + * outputs in the desired range. + */ + +#include <linux/module.h> + +#include "../comedi_pci.h" + +/* + * PCI bar 2 Register I/O map (dev->iobase) + */ +#define PCI1724_DAC_CTRL_REG 0x00 +#define PCI1724_DAC_CTRL_GX(x) BIT(20 + ((x) / 8)) +#define PCI1724_DAC_CTRL_CX(x) (((x) % 8) << 16) +#define PCI1724_DAC_CTRL_MODE(x) (((x) & 0x3) << 14) +#define PCI1724_DAC_CTRL_MODE_GAIN PCI1724_DAC_CTRL_MODE(1) +#define PCI1724_DAC_CTRL_MODE_OFFSET PCI1724_DAC_CTRL_MODE(2) +#define PCI1724_DAC_CTRL_MODE_NORMAL PCI1724_DAC_CTRL_MODE(3) +#define PCI1724_DAC_CTRL_MODE_MASK PCI1724_DAC_CTRL_MODE(3) +#define PCI1724_DAC_CTRL_DATA(x) (((x) & 0x3fff) << 0) +#define PCI1724_SYNC_CTRL_REG 0x04 +#define PCI1724_SYNC_CTRL_DACSTAT BIT(1) +#define PCI1724_SYNC_CTRL_SYN BIT(0) +#define PCI1724_EEPROM_CTRL_REG 0x08 +#define PCI1724_SYNC_TRIG_REG 0x0c /* any value works */ +#define PCI1724_BOARD_ID_REG 0x10 +#define PCI1724_BOARD_ID_MASK (0xf << 0) + +static const struct comedi_lrange adv_pci1724_ao_ranges = { + 4, { + BIP_RANGE(10), + RANGE_mA(0, 20), + RANGE_mA(4, 20), + RANGE_unitless(0, 1) + } +}; + +static int adv_pci1724_dac_idle(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned long context) +{ + unsigned int status; + + status = inl(dev->iobase + PCI1724_SYNC_CTRL_REG); + if ((status & PCI1724_SYNC_CTRL_DACSTAT) == 0) + return 0; + return -EBUSY; +} + +static int adv_pci1724_insn_write(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned long mode = (unsigned long)s->private; + unsigned int chan = CR_CHAN(insn->chanspec); + unsigned int ctrl; + int ret; + int i; + + ctrl = PCI1724_DAC_CTRL_GX(chan) | PCI1724_DAC_CTRL_CX(chan) | mode; + + /* turn off synchronous mode */ + outl(0, dev->iobase + PCI1724_SYNC_CTRL_REG); + + for (i = 0; i < insn->n; ++i) { + unsigned int val = data[i]; + + ret = comedi_timeout(dev, s, insn, adv_pci1724_dac_idle, 0); + if (ret) + return ret; + + outl(ctrl | PCI1724_DAC_CTRL_DATA(val), + dev->iobase + PCI1724_DAC_CTRL_REG); + + s->readback[chan] = val; + } + + return insn->n; +} + +static int adv_pci1724_auto_attach(struct comedi_device *dev, + unsigned long context_unused) +{ + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + struct comedi_subdevice *s; + unsigned int board_id; + int ret; + + ret = comedi_pci_enable(dev); + if (ret) + return ret; + + dev->iobase = pci_resource_start(pcidev, 2); + board_id = inl(dev->iobase + PCI1724_BOARD_ID_REG); + dev_info(dev->class_dev, "board id: %d\n", + board_id & PCI1724_BOARD_ID_MASK); + + ret = comedi_alloc_subdevices(dev, 3); + if (ret) + return ret; + + /* Analog Output subdevice */ + s = &dev->subdevices[0]; + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_GROUND; + s->n_chan = 32; + s->maxdata = 0x3fff; + s->range_table = &adv_pci1724_ao_ranges; + s->insn_write = adv_pci1724_insn_write; + s->private = (void *)PCI1724_DAC_CTRL_MODE_NORMAL; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + /* Offset Calibration subdevice */ + s = &dev->subdevices[1]; + s->type = COMEDI_SUBD_CALIB; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; + s->n_chan = 32; + s->maxdata = 0x3fff; + s->insn_write = adv_pci1724_insn_write; + s->private = (void *)PCI1724_DAC_CTRL_MODE_OFFSET; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; + + /* Gain Calibration subdevice */ + s = &dev->subdevices[2]; + s->type = COMEDI_SUBD_CALIB; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; + s->n_chan = 32; + s->maxdata = 0x3fff; + s->insn_write = adv_pci1724_insn_write; + s->private = (void *)PCI1724_DAC_CTRL_MODE_GAIN; + + return comedi_alloc_subdev_readback(s); +} + +static struct comedi_driver adv_pci1724_driver = { + .driver_name = "adv_pci1724", + .module = THIS_MODULE, + .auto_attach = adv_pci1724_auto_attach, + .detach = comedi_pci_detach, +}; + +static int adv_pci1724_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + return comedi_pci_auto_config(dev, &adv_pci1724_driver, + id->driver_data); +} + +static const struct pci_device_id adv_pci1724_pci_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1724) }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, adv_pci1724_pci_table); + +static struct pci_driver adv_pci1724_pci_driver = { + .name = "adv_pci1724", + .id_table = adv_pci1724_pci_table, + .probe = adv_pci1724_pci_probe, + .remove = comedi_pci_auto_unconfig, +}; +module_comedi_pci_driver(adv_pci1724_driver, adv_pci1724_pci_driver); + +MODULE_AUTHOR("Frank Mori Hess <fmh6jj@gmail.com>"); +MODULE_DESCRIPTION("Advantech PCI-1724U Comedi driver"); +MODULE_LICENSE("GPL"); |