1 // SPDX-License-Identifier: GPL-2.0+
4  * Driver for the ComputerBoards / MeasurementComputing PCI-DDA series.
9  * COMEDI - Linux Control and Measurement Device Interface
10  * Copyright (C) 1997-8 David A. Schleef <ds@schleef.org>
15  * Description: MeasurementComputing PCI-DDA series
16  * Devices: [Measurement Computing] PCI-DDA08/12 (pci-dda08/12),
17  *   PCI-DDA04/12 (pci-dda04/12), PCI-DDA02/12 (pci-dda02/12),
18  *   PCI-DDA08/16 (pci-dda08/16), PCI-DDA04/16 (pci-dda04/16),
19  *   PCI-DDA02/16 (pci-dda02/16)
45 #define CB_DDA_DA_CTRL_DAC(x)		((x) << 2) /*  Specify DAC channel  */
56 #define	CAL_CHANNEL_BITS(channel)	(((channel) << 1) & CAL_CHANNEL_MASK)  argument
110 		.name		= "pci-dda02/12",
115 		.name		= "pci-dda04/12",
120 		.name		= "pci-dda08/12",
125 		.name		= "pci-dda02/16",
130 		.name		= "pci-dda04/16",
135 		.name		= "pci-dda08/16",
153 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_serial_in()
160 		if (inw_p(devpriv->daqio + DACALIBRATION1) & SERIAL_OUT_BIT)  in cb_pcidda_serial_in()
161 			value |= 1 << (value_width - i);  in cb_pcidda_serial_in()
171 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_serial_out()
176 		if (value & (1 << (num_bits - i)))  in cb_pcidda_serial_out()
177 			devpriv->dac_cal1_bits |= SERIAL_IN_BIT;  in cb_pcidda_serial_out()
179 			devpriv->dac_cal1_bits &= ~SERIAL_IN_BIT;  in cb_pcidda_serial_out()
180 		outw_p(devpriv->dac_cal1_bits, devpriv->daqio + DACALIBRATION1);  in cb_pcidda_serial_out()
188 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_read_eeprom()
192 	/* one caldac for every two dac channels */  in cb_pcidda_read_eeprom()
201 	/*  deactivate caldacs (one caldac for every two channels) */  in cb_pcidda_read_eeprom()
204 	outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2);  in cb_pcidda_read_eeprom()
215 	outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2);  in cb_pcidda_read_eeprom()
222 				   unsigned int caldac, unsigned int channel,  in cb_pcidda_write_caldac()  argument
225 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_write_caldac()
228 	/* caldacs use 3 bit channel specification */  in cb_pcidda_write_caldac()
231 	/* one caldac for every two dac channels */  in cb_pcidda_write_caldac()
234 	/* write 3 bit channel */  in cb_pcidda_write_caldac()
235 	cb_pcidda_serial_out(dev, channel, num_channel_bits);  in cb_pcidda_write_caldac()
243 	/*  deactivate caldacs (one caldac for every two channels) */  in cb_pcidda_write_caldac()
248 	outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2);  in cb_pcidda_write_caldac()
251 	outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2);  in cb_pcidda_write_caldac()
254 /* set caldacs to eeprom values for given channel and range */
255 static void cb_pcidda_calibrate(struct comedi_device *dev, unsigned int channel,  in cb_pcidda_calibrate()  argument
258 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_calibrate()
259 	unsigned int caldac = channel / 2;	/* two caldacs per channel */  in cb_pcidda_calibrate()
260 	unsigned int chan = 4 * (channel % 2);	/* caldac channel base */  in cb_pcidda_calibrate()
261 	unsigned int index = 2 * range + 12 * channel;  in cb_pcidda_calibrate()
266 	devpriv->ao_range[channel] = range;  in cb_pcidda_calibrate()
269 	offset = devpriv->eeprom_data[0x7 + index];  in cb_pcidda_calibrate()
270 	gain = devpriv->eeprom_data[0x8 + index];  in cb_pcidda_calibrate()
288 	struct cb_pcidda_private *devpriv = dev->private;  in cb_pcidda_ao_insn_write()
289 	unsigned int channel = CR_CHAN(insn->chanspec);  in cb_pcidda_ao_insn_write()  local
290 	unsigned int range = CR_RANGE(insn->chanspec);  in cb_pcidda_ao_insn_write()
294 	if (range != devpriv->ao_range[channel])  in cb_pcidda_ao_insn_write()
295 		cb_pcidda_calibrate(dev, channel, range);  in cb_pcidda_ao_insn_write()
297 	ctrl = CB_DDA_DA_CTRL_EN | CB_DDA_DA_CTRL_DAC(channel);  in cb_pcidda_ao_insn_write()
317 	outw(ctrl, devpriv->daqio + CB_DDA_DA_CTRL_REG);  in cb_pcidda_ao_insn_write()
319 	for (i = 0; i < insn->n; i++)  in cb_pcidda_ao_insn_write()
320 		outw(data[i], devpriv->daqio + CB_DDA_DA_DATA_REG(channel));  in cb_pcidda_ao_insn_write()
322 	return insn->n;  in cb_pcidda_ao_insn_write()
338 		return -ENODEV;  in cb_pcidda_auto_attach()
339 	dev->board_ptr = board;  in cb_pcidda_auto_attach()
340 	dev->board_name = board->name;  in cb_pcidda_auto_attach()
344 		return -ENOMEM;  in cb_pcidda_auto_attach()
349 	dev->iobase = pci_resource_start(pcidev, 2);  in cb_pcidda_auto_attach()
350 	devpriv->daqio = pci_resource_start(pcidev, 3);  in cb_pcidda_auto_attach()
356 	s = &dev->subdevices[0];  in cb_pcidda_auto_attach()
358 	s->type = COMEDI_SUBD_AO;  in cb_pcidda_auto_attach()
359 	s->subdev_flags = SDF_WRITABLE;  in cb_pcidda_auto_attach()
360 	s->n_chan = board->ao_chans;  in cb_pcidda_auto_attach()
361 	s->maxdata = (1 << board->ao_bits) - 1;  in cb_pcidda_auto_attach()
362 	s->range_table = &cb_pcidda_ranges;  in cb_pcidda_auto_attach()
363 	s->insn_write = cb_pcidda_ao_insn_write;  in cb_pcidda_auto_attach()
365 	/* two 8255 digital io subdevices */  in cb_pcidda_auto_attach()
367 		s = &dev->subdevices[1 + i];  in cb_pcidda_auto_attach()
375 		devpriv->eeprom_data[i] = cb_pcidda_read_eeprom(dev, i);  in cb_pcidda_auto_attach()
378 	for (i = 0; i < board->ao_chans; i++)  in cb_pcidda_auto_attach()
379 		cb_pcidda_calibrate(dev, i, devpriv->ao_range[i]);  in cb_pcidda_auto_attach()
395 				      id->driver_data);  in cb_pcidda_pci_probe()
418 MODULE_DESCRIPTION("Comedi low-level driver");