1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for Amplicon PCI263 relay board. 4 * 5 * Copyright (C) 2002 MEV Ltd. <https://www.mev.co.uk/> 6 * 7 * COMEDI - Linux Control and Measurement Device Interface 8 * Copyright (C) 2000 David A. Schleef <ds@schleef.org> 9 */ 10 11 /* 12 * Driver: amplc_pci263 13 * Description: Amplicon PCI263 14 * Author: Ian Abbott <abbotti@mev.co.uk> 15 * Devices: [Amplicon] PCI263 (amplc_pci263) 16 * Updated: Fri, 12 Apr 2013 15:19:36 +0100 17 * Status: works 18 * 19 * Configuration options: not applicable, uses PCI auto config 20 * 21 * The board appears as one subdevice, with 16 digital outputs, each 22 * connected to a reed-relay. Relay contacts are closed when output is 1. 23 * The state of the outputs can be read. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/comedi/comedi_pci.h> 28 29 /* PCI263 registers */ 30 #define PCI263_DO_0_7_REG 0x00 31 #define PCI263_DO_8_15_REG 0x01 32 33 static int pci263_do_insn_bits(struct comedi_device *dev, 34 struct comedi_subdevice *s, 35 struct comedi_insn *insn, 36 unsigned int *data) 37 { 38 if (comedi_dio_update_state(s, data)) { 39 outb(s->state & 0xff, dev->iobase + PCI263_DO_0_7_REG); 40 outb((s->state >> 8) & 0xff, dev->iobase + PCI263_DO_8_15_REG); 41 } 42 43 data[1] = s->state; 44 45 return insn->n; 46 } 47 48 static int pci263_auto_attach(struct comedi_device *dev, 49 unsigned long context_unused) 50 { 51 struct pci_dev *pci_dev = comedi_to_pci_dev(dev); 52 struct comedi_subdevice *s; 53 int ret; 54 55 ret = comedi_pci_enable(dev); 56 if (ret) 57 return ret; 58 59 dev->iobase = pci_resource_start(pci_dev, 2); 60 ret = comedi_alloc_subdevices(dev, 1); 61 if (ret) 62 return ret; 63 64 /* Digital Output subdevice */ 65 s = &dev->subdevices[0]; 66 s->type = COMEDI_SUBD_DO; 67 s->subdev_flags = SDF_WRITABLE; 68 s->n_chan = 16; 69 s->maxdata = 1; 70 s->range_table = &range_digital; 71 s->insn_bits = pci263_do_insn_bits; 72 73 /* read initial relay state */ 74 s->state = inb(dev->iobase + PCI263_DO_0_7_REG) | 75 (inb(dev->iobase + PCI263_DO_8_15_REG) << 8); 76 77 return 0; 78 } 79 80 static struct comedi_driver amplc_pci263_driver = { 81 .driver_name = "amplc_pci263", 82 .module = THIS_MODULE, 83 .auto_attach = pci263_auto_attach, 84 .detach = comedi_pci_detach, 85 }; 86 87 static const struct pci_device_id pci263_pci_table[] = { 88 { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x000c) }, 89 {0} 90 }; 91 MODULE_DEVICE_TABLE(pci, pci263_pci_table); 92 93 static int amplc_pci263_pci_probe(struct pci_dev *dev, 94 const struct pci_device_id *id) 95 { 96 return comedi_pci_auto_config(dev, &lc_pci263_driver, 97 id->driver_data); 98 } 99 100 static struct pci_driver amplc_pci263_pci_driver = { 101 .name = "amplc_pci263", 102 .id_table = pci263_pci_table, 103 .probe = &lc_pci263_pci_probe, 104 .remove = comedi_pci_auto_unconfig, 105 }; 106 module_comedi_pci_driver(amplc_pci263_driver, amplc_pci263_pci_driver); 107 108 MODULE_AUTHOR("Comedi https://www.comedi.org"); 109 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI263 relay board"); 110 MODULE_LICENSE("GPL"); 111