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https://github.com/Fishwaldo/linux-bl808.git
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8ffdff6a8c
The comedi code came into the kernel back in 2008, but traces its lifetime to much much earlier. It's been polished and buffed and there's really nothing preventing it from being part of the "real" portion of the kernel. So move it to drivers/comedi/ as it belongs there. Many thanks to the hundreds of developers who did the work to make this happen. Cc: Ian Abbott <abbotti@mev.co.uk> Cc: H Hartley Sweeten <hsweeten@visionengravers.com> Link: https://lore.kernel.org/r/YHauop4u3sP6lz8j@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* pcl724.c
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* Comedi driver for 8255 based ISA and PC/104 DIO boards
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*
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* Michal Dobes <dobes@tesnet.cz>
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*/
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/*
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* Driver: pcl724
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* Description: Comedi driver for 8255 based ISA DIO boards
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* Devices: [Advantech] PCL-724 (pcl724), PCL-722 (pcl722), PCL-731 (pcl731),
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* [ADLink] ACL-7122 (acl7122), ACL-7124 (acl7124), PET-48DIO (pet48dio),
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* [WinSystems] PCM-IO48 (pcmio48),
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* [Diamond Systems] ONYX-MM-DIO (onyx-mm-dio)
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* Author: Michal Dobes <dobes@tesnet.cz>
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* Status: untested
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*
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* Configuration options:
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* [0] - IO Base
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* [1] - IRQ (not supported)
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* [2] - number of DIO (pcl722 and acl7122 boards)
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* 0, 144: 144 DIO configuration
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* 1, 96: 96 DIO configuration
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*/
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#include <linux/module.h>
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#include "../comedidev.h"
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#include "8255.h"
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struct pcl724_board {
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const char *name;
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unsigned int io_range;
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unsigned int can_have96:1;
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unsigned int is_pet48:1;
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int numofports;
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};
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static const struct pcl724_board boardtypes[] = {
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{
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.name = "pcl724",
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.io_range = 0x04,
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.numofports = 1, /* 24 DIO channels */
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}, {
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.name = "pcl722",
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.io_range = 0x20,
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.can_have96 = 1,
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.numofports = 6, /* 144 (or 96) DIO channels */
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}, {
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.name = "pcl731",
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.io_range = 0x08,
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.numofports = 2, /* 48 DIO channels */
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}, {
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.name = "acl7122",
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.io_range = 0x20,
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.can_have96 = 1,
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.numofports = 6, /* 144 (or 96) DIO channels */
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}, {
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.name = "acl7124",
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.io_range = 0x04,
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.numofports = 1, /* 24 DIO channels */
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}, {
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.name = "pet48dio",
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.io_range = 0x02,
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.is_pet48 = 1,
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.numofports = 2, /* 48 DIO channels */
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}, {
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.name = "pcmio48",
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.io_range = 0x08,
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.numofports = 2, /* 48 DIO channels */
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}, {
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.name = "onyx-mm-dio",
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.io_range = 0x10,
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.numofports = 2, /* 48 DIO channels */
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},
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};
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static int pcl724_8255mapped_io(struct comedi_device *dev,
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int dir, int port, int data,
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unsigned long iobase)
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{
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int movport = I8255_SIZE * (iobase >> 12);
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iobase &= 0x0fff;
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outb(port + movport, iobase);
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if (dir) {
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outb(data, iobase + 1);
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return 0;
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}
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return inb(iobase + 1);
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}
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static int pcl724_attach(struct comedi_device *dev,
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struct comedi_devconfig *it)
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{
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const struct pcl724_board *board = dev->board_ptr;
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struct comedi_subdevice *s;
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unsigned long iobase;
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unsigned int iorange;
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int n_subdevices;
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int ret;
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int i;
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iorange = board->io_range;
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n_subdevices = board->numofports;
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/* Handle PCL-724 in 96 DIO configuration */
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if (board->can_have96 &&
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(it->options[2] == 1 || it->options[2] == 96)) {
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iorange = 0x10;
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n_subdevices = 4;
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}
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ret = comedi_request_region(dev, it->options[0], iorange);
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if (ret)
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return ret;
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ret = comedi_alloc_subdevices(dev, n_subdevices);
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if (ret)
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return ret;
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for (i = 0; i < dev->n_subdevices; i++) {
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s = &dev->subdevices[i];
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if (board->is_pet48) {
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iobase = dev->iobase + (i * 0x1000);
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ret = subdev_8255_init(dev, s, pcl724_8255mapped_io,
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iobase);
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} else {
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ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
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}
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if (ret)
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return ret;
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}
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return 0;
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}
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static struct comedi_driver pcl724_driver = {
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.driver_name = "pcl724",
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.module = THIS_MODULE,
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.attach = pcl724_attach,
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.detach = comedi_legacy_detach,
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.board_name = &boardtypes[0].name,
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.num_names = ARRAY_SIZE(boardtypes),
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.offset = sizeof(struct pcl724_board),
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};
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module_comedi_driver(pcl724_driver);
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MODULE_AUTHOR("Comedi https://www.comedi.org");
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MODULE_DESCRIPTION("Comedi driver for 8255 based ISA and PC/104 DIO boards");
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MODULE_LICENSE("GPL");
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