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Diffstat (limited to 'drivers/staging/comedi/drivers/mpc624.c')
-rw-r--r--drivers/staging/comedi/drivers/mpc624.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/drivers/staging/comedi/drivers/mpc624.c b/drivers/staging/comedi/drivers/mpc624.c
deleted file mode 100644
index 646f4c086204..000000000000
--- a/drivers/staging/comedi/drivers/mpc624.c
+++ /dev/null
@@ -1,311 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * mpc624.c
- * Hardware driver for a Micro/sys inc. MPC-624 PC/104 board
- *
- * COMEDI - Linux Control and Measurement Device Interface
- * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
- */
-
-/*
- * Driver: mpc624
- * Description: Micro/sys MPC-624 PC/104 board
- * Devices: [Micro/sys] MPC-624 (mpc624)
- * Author: Stanislaw Raczynski <sraczynski@op.pl>
- * Updated: Thu, 15 Sep 2005 12:01:18 +0200
- * Status: working
- *
- * The Micro/sys MPC-624 board is based on the LTC2440 24-bit sigma-delta
- * ADC chip.
- *
- * Subdevices supported by the driver:
- * - Analog In: supported
- * - Digital I/O: not supported
- * - LEDs: not supported
- * - EEPROM: not supported
- *
- * Configuration Options:
- * [0] - I/O base address
- * [1] - conversion rate
- * Conversion rate RMS noise Effective Number Of Bits
- * 0 3.52kHz 23uV 17
- * 1 1.76kHz 3.5uV 20
- * 2 880Hz 2uV 21.3
- * 3 440Hz 1.4uV 21.8
- * 4 220Hz 1uV 22.4
- * 5 110Hz 750uV 22.9
- * 6 55Hz 510nV 23.4
- * 7 27.5Hz 375nV 24
- * 8 13.75Hz 250nV 24.4
- * 9 6.875Hz 200nV 24.6
- * [2] - voltage range
- * 0 -1.01V .. +1.01V
- * 1 -10.1V .. +10.1V
- */
-
-#include <linux/module.h>
-#include "../comedidev.h"
-
-#include <linux/delay.h>
-
-/* Offsets of different ports */
-#define MPC624_MASTER_CONTROL 0 /* not used */
-#define MPC624_GNMUXCH 1 /* Gain, Mux, Channel of ADC */
-#define MPC624_ADC 2 /* read/write to/from ADC */
-#define MPC624_EE 3 /* read/write to/from serial EEPROM via I2C */
-#define MPC624_LEDS 4 /* write to LEDs */
-#define MPC624_DIO 5 /* read/write to/from digital I/O ports */
-#define MPC624_IRQ_MASK 6 /* IRQ masking enable/disable */
-
-/* Register bits' names */
-#define MPC624_ADBUSY BIT(5)
-#define MPC624_ADSDO BIT(4)
-#define MPC624_ADFO BIT(3)
-#define MPC624_ADCS BIT(2)
-#define MPC624_ADSCK BIT(1)
-#define MPC624_ADSDI BIT(0)
-
-/* 32-bit output value bits' names */
-#define MPC624_EOC_BIT BIT(31)
-#define MPC624_DMY_BIT BIT(30)
-#define MPC624_SGN_BIT BIT(29)
-
-/* SDI Speed/Resolution Programming bits */
-#define MPC624_OSR(x) (((x) & 0x1f) << 27)
-#define MPC624_SPEED_3_52_KHZ MPC624_OSR(0x11)
-#define MPC624_SPEED_1_76_KHZ MPC624_OSR(0x12)
-#define MPC624_SPEED_880_HZ MPC624_OSR(0x13)
-#define MPC624_SPEED_440_HZ MPC624_OSR(0x14)
-#define MPC624_SPEED_220_HZ MPC624_OSR(0x15)
-#define MPC624_SPEED_110_HZ MPC624_OSR(0x16)
-#define MPC624_SPEED_55_HZ MPC624_OSR(0x17)
-#define MPC624_SPEED_27_5_HZ MPC624_OSR(0x18)
-#define MPC624_SPEED_13_75_HZ MPC624_OSR(0x19)
-#define MPC624_SPEED_6_875_HZ MPC624_OSR(0x1f)
-
-struct mpc624_private {
- unsigned int ai_speed;
-};
-
-/* -------------------------------------------------------------------------- */
-static const struct comedi_lrange range_mpc624_bipolar1 = {
- 1,
- {
-/* BIP_RANGE(1.01) this is correct, */
- /* but my MPC-624 actually seems to have a range of 2.02 */
- BIP_RANGE(2.02)
- }
-};
-
-static const struct comedi_lrange range_mpc624_bipolar10 = {
- 1,
- {
-/* BIP_RANGE(10.1) this is correct, */
- /* but my MPC-624 actually seems to have a range of 20.2 */
- BIP_RANGE(20.2)
- }
-};
-
-static unsigned int mpc624_ai_get_sample(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- struct mpc624_private *devpriv = dev->private;
- unsigned int data_out = devpriv->ai_speed;
- unsigned int data_in = 0;
- unsigned int bit;
- int i;
-
- /* Start reading data */
- udelay(1);
- for (i = 0; i < 32; i++) {
- /* Set the clock low */
- outb(0, dev->iobase + MPC624_ADC);
- udelay(1);
-
- /* Set the ADSDI line for the next bit (send to MPC624) */
- bit = (data_out & BIT(31)) ? MPC624_ADSDI : 0;
- outb(bit, dev->iobase + MPC624_ADC);
- udelay(1);
-
- /* Set the clock high */
- outb(MPC624_ADSCK | bit, dev->iobase + MPC624_ADC);
- udelay(1);
-
- /* Read ADSDO on high clock (receive from MPC624) */
- data_in <<= 1;
- data_in |= (inb(dev->iobase + MPC624_ADC) & MPC624_ADSDO) >> 4;
- udelay(1);
-
- data_out <<= 1;
- }
-
- /*
- * Received 32-bit long value consist of:
- * 31: EOC - (End Of Transmission) bit - should be 0
- * 30: DMY - (Dummy) bit - should be 0
- * 29: SIG - (Sign) bit - 1 if positive, 0 if negative
- * 28: MSB - (Most Significant Bit) - the first bit of the
- * conversion result
- * ....
- * 05: LSB - (Least Significant Bit)- the last bit of the
- * conversion result
- * 04-00: sub-LSB - sub-LSBs are basically noise, but when
- * averaged properly, they can increase
- * conversion precision up to 29 bits;
- * they can be discarded without loss of
- * resolution.
- */
- if (data_in & MPC624_EOC_BIT)
- dev_dbg(dev->class_dev, "EOC bit is set!");
- if (data_in & MPC624_DMY_BIT)
- dev_dbg(dev->class_dev, "DMY bit is set!");
-
- if (data_in & MPC624_SGN_BIT) {
- /*
- * Voltage is positive
- *
- * comedi operates on unsigned numbers, so mask off EOC
- * and DMY and don't clear the SGN bit
- */
- data_in &= 0x3fffffff;
- } else {
- /*
- * The voltage is negative
- *
- * data_in contains a number in 30-bit two's complement
- * code and we must deal with it
- */
- data_in |= MPC624_SGN_BIT;
- data_in = ~data_in;
- data_in += 1;
- /* clear EOC and DMY bits */
- data_in &= ~(MPC624_EOC_BIT | MPC624_DMY_BIT);
- data_in = 0x20000000 - data_in;
- }
- return data_in;
-}
-
-static int mpc624_ai_eoc(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned long context)
-{
- unsigned char status;
-
- status = inb(dev->iobase + MPC624_ADC);
- if ((status & MPC624_ADBUSY) == 0)
- return 0;
- return -EBUSY;
-}
-
-static int mpc624_ai_insn_read(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- int ret;
- int i;
-
- /*
- * WARNING:
- * We always write 0 to GNSWA bit, so the channel range is +-/10.1Vdc
- */
- outb(insn->chanspec, dev->iobase + MPC624_GNMUXCH);
-
- for (i = 0; i < insn->n; i++) {
- /* Trigger the conversion */
- outb(MPC624_ADSCK, dev->iobase + MPC624_ADC);
- udelay(1);
- outb(MPC624_ADCS | MPC624_ADSCK, dev->iobase + MPC624_ADC);
- udelay(1);
- outb(0, dev->iobase + MPC624_ADC);
- udelay(1);
-
- /* Wait for the conversion to end */
- ret = comedi_timeout(dev, s, insn, mpc624_ai_eoc, 0);
- if (ret)
- return ret;
-
- data[i] = mpc624_ai_get_sample(dev, s);
- }
-
- return insn->n;
-}
-
-static int mpc624_attach(struct comedi_device *dev, struct comedi_devconfig *it)
-{
- struct mpc624_private *devpriv;
- struct comedi_subdevice *s;
- int ret;
-
- ret = comedi_request_region(dev, it->options[0], 0x10);
- if (ret)
- return ret;
-
- devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
- if (!devpriv)
- return -ENOMEM;
-
- switch (it->options[1]) {
- case 0:
- devpriv->ai_speed = MPC624_SPEED_3_52_KHZ;
- break;
- case 1:
- devpriv->ai_speed = MPC624_SPEED_1_76_KHZ;
- break;
- case 2:
- devpriv->ai_speed = MPC624_SPEED_880_HZ;
- break;
- case 3:
- devpriv->ai_speed = MPC624_SPEED_440_HZ;
- break;
- case 4:
- devpriv->ai_speed = MPC624_SPEED_220_HZ;
- break;
- case 5:
- devpriv->ai_speed = MPC624_SPEED_110_HZ;
- break;
- case 6:
- devpriv->ai_speed = MPC624_SPEED_55_HZ;
- break;
- case 7:
- devpriv->ai_speed = MPC624_SPEED_27_5_HZ;
- break;
- case 8:
- devpriv->ai_speed = MPC624_SPEED_13_75_HZ;
- break;
- case 9:
- devpriv->ai_speed = MPC624_SPEED_6_875_HZ;
- break;
- default:
- devpriv->ai_speed = MPC624_SPEED_3_52_KHZ;
- }
-
- ret = comedi_alloc_subdevices(dev, 1);
- if (ret)
- return ret;
-
- /* Analog Input subdevice */
- s = &dev->subdevices[0];
- s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_DIFF;
- s->n_chan = 4;
- s->maxdata = 0x3fffffff;
- s->range_table = (it->options[1] == 0) ? &range_mpc624_bipolar1
- : &range_mpc624_bipolar10;
- s->insn_read = mpc624_ai_insn_read;
-
- return 0;
-}
-
-static struct comedi_driver mpc624_driver = {
- .driver_name = "mpc624",
- .module = THIS_MODULE,
- .attach = mpc624_attach,
- .detach = comedi_legacy_detach,
-};
-module_comedi_driver(mpc624_driver);
-
-MODULE_AUTHOR("Comedi https://www.comedi.org");
-MODULE_DESCRIPTION("Comedi driver for Micro/sys MPC-624 PC/104 board");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-06-12 23:20:01 +0000