diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/multiq3.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/multiq3.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/drivers/staging/comedi/drivers/multiq3.c b/drivers/staging/comedi/drivers/multiq3.c deleted file mode 100644 index c1897aee9a9a..000000000000 --- a/drivers/staging/comedi/drivers/multiq3.c +++ /dev/null @@ -1,332 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * multiq3.c - * Hardware driver for Quanser Consulting MultiQ-3 board - * - * COMEDI - Linux Control and Measurement Device Interface - * Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se> - */ - -/* - * Driver: multiq3 - * Description: Quanser Consulting MultiQ-3 - * Devices: [Quanser Consulting] MultiQ-3 (multiq3) - * Author: Anders Blomdell <anders.blomdell@control.lth.se> - * Status: works - * - * Configuration Options: - * [0] - I/O port base address - * [1] - IRQ (not used) - * [2] - Number of optional encoder chips installed on board - * 0 = none - * 1 = 2 inputs (Model -2E) - * 2 = 4 inputs (Model -4E) - * 3 = 6 inputs (Model -6E) - * 4 = 8 inputs (Model -8E) - */ - -#include <linux/module.h> - -#include "../comedidev.h" - -/* - * Register map - */ -#define MULTIQ3_DI_REG 0x00 -#define MULTIQ3_DO_REG 0x00 -#define MULTIQ3_AO_REG 0x02 -#define MULTIQ3_AI_REG 0x04 -#define MULTIQ3_AI_CONV_REG 0x04 -#define MULTIQ3_STATUS_REG 0x06 -#define MULTIQ3_STATUS_EOC BIT(3) -#define MULTIQ3_STATUS_EOC_I BIT(4) -#define MULTIQ3_CTRL_REG 0x06 -#define MULTIQ3_CTRL_AO_CHAN(x) (((x) & 0x7) << 0) -#define MULTIQ3_CTRL_RC(x) (((x) & 0x3) << 0) -#define MULTIQ3_CTRL_AI_CHAN(x) (((x) & 0x7) << 3) -#define MULTIQ3_CTRL_E_CHAN(x) (((x) & 0x7) << 3) -#define MULTIQ3_CTRL_EN BIT(6) -#define MULTIQ3_CTRL_AZ BIT(7) -#define MULTIQ3_CTRL_CAL BIT(8) -#define MULTIQ3_CTRL_SH BIT(9) -#define MULTIQ3_CTRL_CLK BIT(10) -#define MULTIQ3_CTRL_LD (3 << 11) -#define MULTIQ3_CLK_REG 0x08 -#define MULTIQ3_ENC_DATA_REG 0x0c -#define MULTIQ3_ENC_CTRL_REG 0x0e - -/* - * Encoder chip commands (from the programming manual) - */ -#define MULTIQ3_CLOCK_DATA 0x00 /* FCK frequency divider */ -#define MULTIQ3_CLOCK_SETUP 0x18 /* xfer PR0 to PSC */ -#define MULTIQ3_INPUT_SETUP 0x41 /* enable inputs A and B */ -#define MULTIQ3_QUAD_X4 0x38 /* quadrature */ -#define MULTIQ3_BP_RESET 0x01 /* reset byte pointer */ -#define MULTIQ3_CNTR_RESET 0x02 /* reset counter */ -#define MULTIQ3_TRSFRPR_CTR 0x08 /* xfre preset reg to counter */ -#define MULTIQ3_TRSFRCNTR_OL 0x10 /* xfer CNTR to OL (x and y) */ -#define MULTIQ3_EFLAG_RESET 0x06 /* reset E bit of flag reg */ - -static void multiq3_set_ctrl(struct comedi_device *dev, unsigned int bits) -{ - /* - * According to the programming manual, the SH and CLK bits should - * be kept high at all times. - */ - outw(MULTIQ3_CTRL_SH | MULTIQ3_CTRL_CLK | bits, - dev->iobase + MULTIQ3_CTRL_REG); -} - -static int multiq3_ai_status(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned long context) -{ - unsigned int status; - - status = inw(dev->iobase + MULTIQ3_STATUS_REG); - if (status & context) - return 0; - return -EBUSY; -} - -static int multiq3_ai_insn_read(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int val; - int ret; - int i; - - multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN | MULTIQ3_CTRL_AI_CHAN(chan)); - - ret = comedi_timeout(dev, s, insn, multiq3_ai_status, - MULTIQ3_STATUS_EOC); - if (ret) - return ret; - - for (i = 0; i < insn->n; i++) { - outw(0, dev->iobase + MULTIQ3_AI_CONV_REG); - - ret = comedi_timeout(dev, s, insn, multiq3_ai_status, - MULTIQ3_STATUS_EOC_I); - if (ret) - return ret; - - /* get a 16-bit sample; mask it to the subdevice resolution */ - val = inb(dev->iobase + MULTIQ3_AI_REG) << 8; - val |= inb(dev->iobase + MULTIQ3_AI_REG); - val &= s->maxdata; - - /* munge the 2's complement value to offset binary */ - data[i] = comedi_offset_munge(s, val); - } - - return insn->n; -} - -static int multiq3_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 val = s->readback[chan]; - int i; - - for (i = 0; i < insn->n; i++) { - val = data[i]; - multiq3_set_ctrl(dev, MULTIQ3_CTRL_LD | - MULTIQ3_CTRL_AO_CHAN(chan)); - outw(val, dev->iobase + MULTIQ3_AO_REG); - multiq3_set_ctrl(dev, 0); - } - s->readback[chan] = val; - - return insn->n; -} - -static int multiq3_di_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data) -{ - data[1] = inw(dev->iobase + MULTIQ3_DI_REG); - - return insn->n; -} - -static int multiq3_do_insn_bits(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - if (comedi_dio_update_state(s, data)) - outw(s->state, dev->iobase + MULTIQ3_DO_REG); - - data[1] = s->state; - - return insn->n; -} - -static int multiq3_encoder_insn_read(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned int chan = CR_CHAN(insn->chanspec); - unsigned int val; - int i; - - for (i = 0; i < insn->n; i++) { - /* select encoder channel */ - multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN | - MULTIQ3_CTRL_E_CHAN(chan)); - - /* reset the byte pointer */ - outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG); - - /* latch the data */ - outb(MULTIQ3_TRSFRCNTR_OL, dev->iobase + MULTIQ3_ENC_CTRL_REG); - - /* read the 24-bit encoder data (lsb/mid/msb) */ - val = inb(dev->iobase + MULTIQ3_ENC_DATA_REG); - val |= (inb(dev->iobase + MULTIQ3_ENC_DATA_REG) << 8); - val |= (inb(dev->iobase + MULTIQ3_ENC_DATA_REG) << 16); - - /* - * Munge the data so that the reset value is in the middle - * of the maxdata range, i.e.: - * - * real value comedi value - * 0xffffff 0x7fffff 1 negative count - * 0x000000 0x800000 reset value - * 0x000001 0x800001 1 positive count - * - * It's possible for the 24-bit counter to overflow but it - * would normally take _quite_ a few turns. A 2000 line - * encoder in quadrature results in 8000 counts/rev. So about - * 1048 turns in either direction can be measured without - * an overflow. - */ - data[i] = (val + ((s->maxdata + 1) >> 1)) & s->maxdata; - } - - return insn->n; -} - -static void multiq3_encoder_reset(struct comedi_device *dev, - unsigned int chan) -{ - multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN | MULTIQ3_CTRL_E_CHAN(chan)); - outb(MULTIQ3_EFLAG_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG); - outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG); - outb(MULTIQ3_CLOCK_DATA, dev->iobase + MULTIQ3_ENC_DATA_REG); - outb(MULTIQ3_CLOCK_SETUP, dev->iobase + MULTIQ3_ENC_CTRL_REG); - outb(MULTIQ3_INPUT_SETUP, dev->iobase + MULTIQ3_ENC_CTRL_REG); - outb(MULTIQ3_QUAD_X4, dev->iobase + MULTIQ3_ENC_CTRL_REG); - outb(MULTIQ3_CNTR_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG); -} - -static int multiq3_encoder_insn_config(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, - unsigned int *data) -{ - unsigned int chan = CR_CHAN(insn->chanspec); - - switch (data[0]) { - case INSN_CONFIG_RESET: - multiq3_encoder_reset(dev, chan); - break; - default: - return -EINVAL; - } - - return insn->n; -} - -static int multiq3_attach(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct comedi_subdevice *s; - int ret; - int i; - - ret = comedi_request_region(dev, it->options[0], 0x10); - if (ret) - return ret; - - ret = comedi_alloc_subdevices(dev, 5); - if (ret) - return ret; - - /* Analog Input subdevice */ - s = &dev->subdevices[0]; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND; - s->n_chan = 8; - s->maxdata = 0x1fff; - s->range_table = &range_bipolar5; - s->insn_read = multiq3_ai_insn_read; - - /* Analog Output subdevice */ - s = &dev->subdevices[1]; - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_WRITABLE; - s->n_chan = 8; - s->maxdata = 0x0fff; - s->range_table = &range_bipolar5; - s->insn_write = multiq3_ao_insn_write; - - ret = comedi_alloc_subdev_readback(s); - if (ret) - return ret; - - /* Digital Input subdevice */ - s = &dev->subdevices[2]; - s->type = COMEDI_SUBD_DI; - s->subdev_flags = SDF_READABLE; - s->n_chan = 16; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = multiq3_di_insn_bits; - - /* Digital Output subdevice */ - s = &dev->subdevices[3]; - s->type = COMEDI_SUBD_DO; - s->subdev_flags = SDF_WRITABLE; - s->n_chan = 16; - s->maxdata = 1; - s->range_table = &range_digital; - s->insn_bits = multiq3_do_insn_bits; - - /* Encoder (Counter) subdevice */ - s = &dev->subdevices[4]; - s->type = COMEDI_SUBD_COUNTER; - s->subdev_flags = SDF_READABLE | SDF_LSAMPL; - s->n_chan = it->options[2] * 2; - s->maxdata = 0x00ffffff; - s->range_table = &range_unknown; - s->insn_read = multiq3_encoder_insn_read; - s->insn_config = multiq3_encoder_insn_config; - - for (i = 0; i < s->n_chan; i++) - multiq3_encoder_reset(dev, i); - - return 0; -} - -static struct comedi_driver multiq3_driver = { - .driver_name = "multiq3", - .module = THIS_MODULE, - .attach = multiq3_attach, - .detach = comedi_legacy_detach, -}; -module_comedi_driver(multiq3_driver); - -MODULE_AUTHOR("Comedi https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi driver for Quanser Consulting MultiQ-3 board"); -MODULE_LICENSE("GPL"); |