diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/cb_pcidda.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/cb_pcidda.c | 421 |
1 files changed, 0 insertions, 421 deletions
diff --git a/drivers/staging/comedi/drivers/cb_pcidda.c b/drivers/staging/comedi/drivers/cb_pcidda.c deleted file mode 100644 index 78cf1603638c..000000000000 --- a/drivers/staging/comedi/drivers/cb_pcidda.c +++ /dev/null @@ -1,421 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * comedi/drivers/cb_pcidda.c - * Driver for the ComputerBoards / MeasurementComputing PCI-DDA series. - * - * Copyright (C) 2001 Ivan Martinez <ivanmr@altavista.com> - * Copyright (C) 2001 Frank Mori Hess <fmhess@users.sourceforge.net> - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 1997-8 David A. Schleef <ds@schleef.org> - */ - -/* - * Driver: cb_pcidda - * Description: MeasurementComputing PCI-DDA series - * Devices: [Measurement Computing] PCI-DDA08/12 (pci-dda08/12), - * PCI-DDA04/12 (pci-dda04/12), PCI-DDA02/12 (pci-dda02/12), - * PCI-DDA08/16 (pci-dda08/16), PCI-DDA04/16 (pci-dda04/16), - * PCI-DDA02/16 (pci-dda02/16) - * Author: Ivan Martinez <ivanmr@altavista.com> - * Frank Mori Hess <fmhess@users.sourceforge.net> - * Status: works - * - * Configuration options: not applicable, uses PCI auto config - * - * Only simple analog output writing is supported. - */ - -#include <linux/module.h> - -#include "../comedi_pci.h" - -#include "8255.h" - -#define EEPROM_SIZE 128 /* number of entries in eeprom */ -/* maximum number of ao channels for supported boards */ -#define MAX_AO_CHANNELS 8 - -/* Digital I/O registers */ -#define CB_DDA_DIO0_8255_BASE 0x00 -#define CB_DDA_DIO1_8255_BASE 0x04 - -/* DAC registers */ -#define CB_DDA_DA_CTRL_REG 0x00 /* D/A Control Register */ -#define CB_DDA_DA_CTRL_SU BIT(0) /* Simultaneous update */ -#define CB_DDA_DA_CTRL_EN BIT(1) /* Enable specified DAC */ -#define CB_DDA_DA_CTRL_DAC(x) ((x) << 2) /* Specify DAC channel */ -#define CB_DDA_DA_CTRL_RANGE2V5 (0 << 6) /* 2.5V range */ -#define CB_DDA_DA_CTRL_RANGE5V (2 << 6) /* 5V range */ -#define CB_DDA_DA_CTRL_RANGE10V (3 << 6) /* 10V range */ -#define CB_DDA_DA_CTRL_UNIP BIT(8) /* Unipolar range */ - -#define DACALIBRATION1 4 /* D/A CALIBRATION REGISTER 1 */ -/* write bits */ -/* serial data input for eeprom, caldacs, reference dac */ -#define SERIAL_IN_BIT 0x1 -#define CAL_CHANNEL_MASK (0x7 << 1) -#define CAL_CHANNEL_BITS(channel) (((channel) << 1) & CAL_CHANNEL_MASK) -/* read bits */ -#define CAL_COUNTER_MASK 0x1f -/* calibration counter overflow status bit */ -#define CAL_COUNTER_OVERFLOW_BIT 0x20 -/* analog output is less than reference dac voltage */ -#define AO_BELOW_REF_BIT 0x40 -#define SERIAL_OUT_BIT 0x80 /* serial data out, for reading from eeprom */ - -#define DACALIBRATION2 6 /* D/A CALIBRATION REGISTER 2 */ -#define SELECT_EEPROM_BIT 0x1 /* send serial data in to eeprom */ -/* don't send serial data to MAX542 reference dac */ -#define DESELECT_REF_DAC_BIT 0x2 -/* don't send serial data to caldac n */ -#define DESELECT_CALDAC_BIT(n) (0x4 << (n)) -/* manual says to set this bit with no explanation */ -#define DUMMY_BIT 0x40 - -#define CB_DDA_DA_DATA_REG(x) (0x08 + ((x) * 2)) - -/* Offsets for the caldac channels */ -#define CB_DDA_CALDAC_FINE_GAIN 0 -#define CB_DDA_CALDAC_COURSE_GAIN 1 -#define CB_DDA_CALDAC_COURSE_OFFSET 2 -#define CB_DDA_CALDAC_FINE_OFFSET 3 - -static const struct comedi_lrange cb_pcidda_ranges = { - 6, { - BIP_RANGE(10), - BIP_RANGE(5), - BIP_RANGE(2.5), - UNI_RANGE(10), - UNI_RANGE(5), - UNI_RANGE(2.5) - } -}; - -enum cb_pcidda_boardid { - BOARD_DDA02_12, - BOARD_DDA04_12, - BOARD_DDA08_12, - BOARD_DDA02_16, - BOARD_DDA04_16, - BOARD_DDA08_16, -}; - -struct cb_pcidda_board { - const char *name; - int ao_chans; - int ao_bits; -}; - -static const struct cb_pcidda_board cb_pcidda_boards[] = { - [BOARD_DDA02_12] = { - .name = "pci-dda02/12", - .ao_chans = 2, - .ao_bits = 12, - }, - [BOARD_DDA04_12] = { - .name = "pci-dda04/12", - .ao_chans = 4, - .ao_bits = 12, - }, - [BOARD_DDA08_12] = { - .name = "pci-dda08/12", - .ao_chans = 8, - .ao_bits = 12, - }, - [BOARD_DDA02_16] = { - .name = "pci-dda02/16", - .ao_chans = 2, - .ao_bits = 16, - }, - [BOARD_DDA04_16] = { - .name = "pci-dda04/16", - .ao_chans = 4, - .ao_bits = 16, - }, - [BOARD_DDA08_16] = { - .name = "pci-dda08/16", - .ao_chans = 8, - .ao_bits = 16, - }, -}; - -struct cb_pcidda_private { - unsigned long daqio; - /* bits last written to da calibration register 1 */ - unsigned int dac_cal1_bits; - /* current range settings for output channels */ - unsigned int ao_range[MAX_AO_CHANNELS]; - u16 eeprom_data[EEPROM_SIZE]; /* software copy of board's eeprom */ -}; - -/* lowlevel read from eeprom */ -static unsigned int cb_pcidda_serial_in(struct comedi_device *dev) -{ - struct cb_pcidda_private *devpriv = dev->private; - unsigned int value = 0; - int i; - const int value_width = 16; /* number of bits wide values are */ - - for (i = 1; i <= value_width; i++) { - /* read bits most significant bit first */ - if (inw_p(devpriv->daqio + DACALIBRATION1) & SERIAL_OUT_BIT) - value |= 1 << (value_width - i); - } - - return value; -} - -/* lowlevel write to eeprom/dac */ -static void cb_pcidda_serial_out(struct comedi_device *dev, unsigned int value, - unsigned int num_bits) -{ - struct cb_pcidda_private *devpriv = dev->private; - int i; - - for (i = 1; i <= num_bits; i++) { - /* send bits most significant bit first */ - if (value & (1 << (num_bits - i))) - devpriv->dac_cal1_bits |= SERIAL_IN_BIT; - else - devpriv->dac_cal1_bits &= ~SERIAL_IN_BIT; - outw_p(devpriv->dac_cal1_bits, devpriv->daqio + DACALIBRATION1); - } -} - -/* reads a 16 bit value from board's eeprom */ -static unsigned int cb_pcidda_read_eeprom(struct comedi_device *dev, - unsigned int address) -{ - struct cb_pcidda_private *devpriv = dev->private; - unsigned int i; - unsigned int cal2_bits; - unsigned int value; - /* one caldac for every two dac channels */ - const int max_num_caldacs = 4; - /* bits to send to tell eeprom we want to read */ - const int read_instruction = 0x6; - const int instruction_length = 3; - const int address_length = 8; - - /* send serial output stream to eeprom */ - cal2_bits = SELECT_EEPROM_BIT | DESELECT_REF_DAC_BIT | DUMMY_BIT; - /* deactivate caldacs (one caldac for every two channels) */ - for (i = 0; i < max_num_caldacs; i++) - cal2_bits |= DESELECT_CALDAC_BIT(i); - outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2); - - /* tell eeprom we want to read */ - cb_pcidda_serial_out(dev, read_instruction, instruction_length); - /* send address we want to read from */ - cb_pcidda_serial_out(dev, address, address_length); - - value = cb_pcidda_serial_in(dev); - - /* deactivate eeprom */ - cal2_bits &= ~SELECT_EEPROM_BIT; - outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2); - - return value; -} - -/* writes to 8 bit calibration dacs */ -static void cb_pcidda_write_caldac(struct comedi_device *dev, - unsigned int caldac, unsigned int channel, - unsigned int value) -{ - struct cb_pcidda_private *devpriv = dev->private; - unsigned int cal2_bits; - unsigned int i; - /* caldacs use 3 bit channel specification */ - const int num_channel_bits = 3; - const int num_caldac_bits = 8; /* 8 bit calibration dacs */ - /* one caldac for every two dac channels */ - const int max_num_caldacs = 4; - - /* write 3 bit channel */ - cb_pcidda_serial_out(dev, channel, num_channel_bits); - /* write 8 bit caldac value */ - cb_pcidda_serial_out(dev, value, num_caldac_bits); - -/* - * latch stream into appropriate caldac deselect reference dac - */ - cal2_bits = DESELECT_REF_DAC_BIT | DUMMY_BIT; - /* deactivate caldacs (one caldac for every two channels) */ - for (i = 0; i < max_num_caldacs; i++) - cal2_bits |= DESELECT_CALDAC_BIT(i); - /* activate the caldac we want */ - cal2_bits &= ~DESELECT_CALDAC_BIT(caldac); - outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2); - /* deactivate caldac */ - cal2_bits |= DESELECT_CALDAC_BIT(caldac); - outw_p(cal2_bits, devpriv->daqio + DACALIBRATION2); -} - -/* set caldacs to eeprom values for given channel and range */ -static void cb_pcidda_calibrate(struct comedi_device *dev, unsigned int channel, - unsigned int range) -{ - struct cb_pcidda_private *devpriv = dev->private; - unsigned int caldac = channel / 2; /* two caldacs per channel */ - unsigned int chan = 4 * (channel % 2); /* caldac channel base */ - unsigned int index = 2 * range + 12 * channel; - unsigned int offset; - unsigned int gain; - - /* save range so we can tell when we need to readjust calibration */ - devpriv->ao_range[channel] = range; - - /* get values from eeprom data */ - offset = devpriv->eeprom_data[0x7 + index]; - gain = devpriv->eeprom_data[0x8 + index]; - - /* set caldacs */ - cb_pcidda_write_caldac(dev, caldac, chan + CB_DDA_CALDAC_COURSE_OFFSET, - (offset >> 8) & 0xff); - cb_pcidda_write_caldac(dev, caldac, chan + CB_DDA_CALDAC_FINE_OFFSET, - offset & 0xff); - cb_pcidda_write_caldac(dev, caldac, chan + CB_DDA_CALDAC_COURSE_GAIN, - (gain >> 8) & 0xff); - cb_pcidda_write_caldac(dev, caldac, chan + CB_DDA_CALDAC_FINE_GAIN, - gain & 0xff); -} - -static int cb_pcidda_ao_insn_write(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - struct cb_pcidda_private *devpriv = dev->private; - unsigned int channel = CR_CHAN(insn->chanspec); - unsigned int range = CR_RANGE(insn->chanspec); - unsigned int ctrl; - unsigned int i; - - if (range != devpriv->ao_range[channel]) - cb_pcidda_calibrate(dev, channel, range); - - ctrl = CB_DDA_DA_CTRL_EN | CB_DDA_DA_CTRL_DAC(channel); - - switch (range) { - case 0: - case 3: - ctrl |= CB_DDA_DA_CTRL_RANGE10V; - break; - case 1: - case 4: - ctrl |= CB_DDA_DA_CTRL_RANGE5V; - break; - case 2: - case 5: - ctrl |= CB_DDA_DA_CTRL_RANGE2V5; - break; - } - - if (range > 2) - ctrl |= CB_DDA_DA_CTRL_UNIP; - - outw(ctrl, devpriv->daqio + CB_DDA_DA_CTRL_REG); - - for (i = 0; i < insn->n; i++) - outw(data[i], devpriv->daqio + CB_DDA_DA_DATA_REG(channel)); - - return insn->n; -} - -static int cb_pcidda_auto_attach(struct comedi_device *dev, - unsigned long context) -{ - struct pci_dev *pcidev = comedi_to_pci_dev(dev); - const struct cb_pcidda_board *board = NULL; - struct cb_pcidda_private *devpriv; - struct comedi_subdevice *s; - int i; - int ret; - - if (context < ARRAY_SIZE(cb_pcidda_boards)) - board = &cb_pcidda_boards[context]; - if (!board) - return -ENODEV; - dev->board_ptr = board; - dev->board_name = board->name; - - devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); - if (!devpriv) - return -ENOMEM; - - ret = comedi_pci_enable(dev); - if (ret) - return ret; - dev->iobase = pci_resource_start(pcidev, 2); - devpriv->daqio = pci_resource_start(pcidev, 3); - - ret = comedi_alloc_subdevices(dev, 3); - if (ret) - return ret; - - s = &dev->subdevices[0]; - /* analog output subdevice */ - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_WRITABLE; - s->n_chan = board->ao_chans; - s->maxdata = (1 << board->ao_bits) - 1; - s->range_table = &cb_pcidda_ranges; - s->insn_write = cb_pcidda_ao_insn_write; - - /* two 8255 digital io subdevices */ - for (i = 0; i < 2; i++) { - s = &dev->subdevices[1 + i]; - ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE); - if (ret) - return ret; - } - - /* Read the caldac eeprom data */ - for (i = 0; i < EEPROM_SIZE; i++) - devpriv->eeprom_data[i] = cb_pcidda_read_eeprom(dev, i); - - /* set calibrations dacs */ - for (i = 0; i < board->ao_chans; i++) - cb_pcidda_calibrate(dev, i, devpriv->ao_range[i]); - - return 0; -} - -static struct comedi_driver cb_pcidda_driver = { - .driver_name = "cb_pcidda", - .module = THIS_MODULE, - .auto_attach = cb_pcidda_auto_attach, - .detach = comedi_pci_detach, -}; - -static int cb_pcidda_pci_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - return comedi_pci_auto_config(dev, &cb_pcidda_driver, - id->driver_data); -} - -static const struct pci_device_id cb_pcidda_pci_table[] = { - { PCI_VDEVICE(CB, 0x0020), BOARD_DDA02_12 }, - { PCI_VDEVICE(CB, 0x0021), BOARD_DDA04_12 }, - { PCI_VDEVICE(CB, 0x0022), BOARD_DDA08_12 }, - { PCI_VDEVICE(CB, 0x0023), BOARD_DDA02_16 }, - { PCI_VDEVICE(CB, 0x0024), BOARD_DDA04_16 }, - { PCI_VDEVICE(CB, 0x0025), BOARD_DDA08_16 }, - { 0 } -}; -MODULE_DEVICE_TABLE(pci, cb_pcidda_pci_table); - -static struct pci_driver cb_pcidda_pci_driver = { - .name = "cb_pcidda", - .id_table = cb_pcidda_pci_table, - .probe = cb_pcidda_pci_probe, - .remove = comedi_pci_auto_unconfig, -}; -module_comedi_pci_driver(cb_pcidda_driver, cb_pcidda_pci_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi low-level driver"); -MODULE_LICENSE("GPL"); |