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Diffstat (limited to 'drivers/staging/comedi/drivers/comedi_parport.c')
-rw-r--r--drivers/staging/comedi/drivers/comedi_parport.c306
1 files changed, 0 insertions, 306 deletions
diff --git a/drivers/staging/comedi/drivers/comedi_parport.c b/drivers/staging/comedi/drivers/comedi_parport.c
deleted file mode 100644
index 5338b5eea440..000000000000
--- a/drivers/staging/comedi/drivers/comedi_parport.c
+++ /dev/null
@@ -1,306 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * comedi_parport.c
- * Comedi driver for standard parallel port
- *
- * For more information see:
- * http://retired.beyondlogic.org/spp/parallel.htm
- *
- * COMEDI - Linux Control and Measurement Device Interface
- * Copyright (C) 1998,2001 David A. Schleef <ds@schleef.org>
- */
-
-/*
- * Driver: comedi_parport
- * Description: Standard PC parallel port
- * Author: ds
- * Status: works in immediate mode
- * Devices: [standard] parallel port (comedi_parport)
- * Updated: Tue, 30 Apr 2002 21:11:45 -0700
- *
- * A cheap and easy way to get a few more digital I/O lines. Steal
- * additional parallel ports from old computers or your neighbors'
- * computers.
- *
- * Option list:
- * 0: I/O port base for the parallel port.
- * 1: IRQ (optional)
- *
- * Parallel Port Lines:
- *
- * pin subdev chan type name
- * ----- ------ ---- ---- --------------
- * 1 2 0 DO strobe
- * 2 0 0 DIO data 0
- * 3 0 1 DIO data 1
- * 4 0 2 DIO data 2
- * 5 0 3 DIO data 3
- * 6 0 4 DIO data 4
- * 7 0 5 DIO data 5
- * 8 0 6 DIO data 6
- * 9 0 7 DIO data 7
- * 10 1 3 DI ack
- * 11 1 4 DI busy
- * 12 1 2 DI paper out
- * 13 1 1 DI select in
- * 14 2 1 DO auto LF
- * 15 1 0 DI error
- * 16 2 2 DO init
- * 17 2 3 DO select printer
- * 18-25 ground
- *
- * When an IRQ is configured subdevice 3 pretends to be a digital
- * input subdevice, but it always returns 0 when read. However, if
- * you run a command with scan_begin_src=TRIG_EXT, it uses pin 10
- * as a external trigger, which can be used to wake up tasks.
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-
-#include "../comedidev.h"
-
-/*
- * Register map
- */
-#define PARPORT_DATA_REG 0x00
-#define PARPORT_STATUS_REG 0x01
-#define PARPORT_CTRL_REG 0x02
-#define PARPORT_CTRL_IRQ_ENA BIT(4)
-#define PARPORT_CTRL_BIDIR_ENA BIT(5)
-
-static int parport_data_reg_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- if (comedi_dio_update_state(s, data))
- outb(s->state, dev->iobase + PARPORT_DATA_REG);
-
- data[1] = inb(dev->iobase + PARPORT_DATA_REG);
-
- return insn->n;
-}
-
-static int parport_data_reg_insn_config(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- unsigned int ctrl;
- int ret;
-
- ret = comedi_dio_insn_config(dev, s, insn, data, 0xff);
- if (ret)
- return ret;
-
- ctrl = inb(dev->iobase + PARPORT_CTRL_REG);
- if (s->io_bits)
- ctrl &= ~PARPORT_CTRL_BIDIR_ENA;
- else
- ctrl |= PARPORT_CTRL_BIDIR_ENA;
- outb(ctrl, dev->iobase + PARPORT_CTRL_REG);
-
- return insn->n;
-}
-
-static int parport_status_reg_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- data[1] = inb(dev->iobase + PARPORT_STATUS_REG) >> 3;
-
- return insn->n;
-}
-
-static int parport_ctrl_reg_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- unsigned int ctrl;
-
- if (comedi_dio_update_state(s, data)) {
- ctrl = inb(dev->iobase + PARPORT_CTRL_REG);
- ctrl &= (PARPORT_CTRL_IRQ_ENA | PARPORT_CTRL_BIDIR_ENA);
- ctrl |= s->state;
- outb(ctrl, dev->iobase + PARPORT_CTRL_REG);
- }
-
- data[1] = s->state;
-
- return insn->n;
-}
-
-static int parport_intr_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- data[1] = 0;
- return insn->n;
-}
-
-static int parport_intr_cmdtest(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_cmd *cmd)
-{
- int err = 0;
-
- /* Step 1 : check if triggers are trivially valid */
-
- err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
- err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
- err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
- err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
- err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
-
- if (err)
- return 1;
-
- /* Step 2a : make sure trigger sources are unique */
- /* Step 2b : and mutually compatible */
-
- /* Step 3: check if arguments are trivially valid */
-
- err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
- err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
- err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
- err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
- cmd->chanlist_len);
- err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
-
- if (err)
- return 3;
-
- /* Step 4: fix up any arguments */
-
- /* Step 5: check channel list if it exists */
-
- return 0;
-}
-
-static int parport_intr_cmd(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- unsigned int ctrl;
-
- ctrl = inb(dev->iobase + PARPORT_CTRL_REG);
- ctrl |= PARPORT_CTRL_IRQ_ENA;
- outb(ctrl, dev->iobase + PARPORT_CTRL_REG);
-
- return 0;
-}
-
-static int parport_intr_cancel(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- unsigned int ctrl;
-
- ctrl = inb(dev->iobase + PARPORT_CTRL_REG);
- ctrl &= ~PARPORT_CTRL_IRQ_ENA;
- outb(ctrl, dev->iobase + PARPORT_CTRL_REG);
-
- return 0;
-}
-
-static irqreturn_t parport_interrupt(int irq, void *d)
-{
- struct comedi_device *dev = d;
- struct comedi_subdevice *s = dev->read_subdev;
- unsigned int ctrl;
- unsigned short val = 0;
-
- ctrl = inb(dev->iobase + PARPORT_CTRL_REG);
- if (!(ctrl & PARPORT_CTRL_IRQ_ENA))
- return IRQ_NONE;
-
- comedi_buf_write_samples(s, &val, 1);
- comedi_handle_events(dev, s);
-
- return IRQ_HANDLED;
-}
-
-static int parport_attach(struct comedi_device *dev,
- struct comedi_devconfig *it)
-{
- struct comedi_subdevice *s;
- int ret;
-
- ret = comedi_request_region(dev, it->options[0], 0x03);
- if (ret)
- return ret;
-
- if (it->options[1]) {
- ret = request_irq(it->options[1], parport_interrupt, 0,
- dev->board_name, dev);
- if (ret == 0)
- dev->irq = it->options[1];
- }
-
- ret = comedi_alloc_subdevices(dev, dev->irq ? 4 : 3);
- if (ret)
- return ret;
-
- /* Digial I/O subdevice - Parallel port DATA register */
- s = &dev->subdevices[0];
- s->type = COMEDI_SUBD_DIO;
- s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
- s->n_chan = 8;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = parport_data_reg_insn_bits;
- s->insn_config = parport_data_reg_insn_config;
-
- /* Digial Input subdevice - Parallel port STATUS register */
- s = &dev->subdevices[1];
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE;
- s->n_chan = 5;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = parport_status_reg_insn_bits;
-
- /* Digial Output subdevice - Parallel port CONTROL register */
- s = &dev->subdevices[2];
- s->type = COMEDI_SUBD_DO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 4;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = parport_ctrl_reg_insn_bits;
-
- if (dev->irq) {
- /* Digial Input subdevice - Interrupt support */
- s = &dev->subdevices[3];
- dev->read_subdev = s;
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
- s->n_chan = 1;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = parport_intr_insn_bits;
- s->len_chanlist = 1;
- s->do_cmdtest = parport_intr_cmdtest;
- s->do_cmd = parport_intr_cmd;
- s->cancel = parport_intr_cancel;
- }
-
- outb(0, dev->iobase + PARPORT_DATA_REG);
- outb(0, dev->iobase + PARPORT_CTRL_REG);
-
- return 0;
-}
-
-static struct comedi_driver parport_driver = {
- .driver_name = "comedi_parport",
- .module = THIS_MODULE,
- .attach = parport_attach,
- .detach = comedi_legacy_detach,
-};
-module_comedi_driver(parport_driver);
-
-MODULE_AUTHOR("Comedi https://www.comedi.org");
-MODULE_DESCRIPTION("Comedi: Standard parallel port driver");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-06-13 10:04:01 +0000