/* * COMEDI driver for generic PCI based 8255 digital i/o boards * Copyright (C) 2012 H Hartley Sweeten * * Based on the tested adl_pci7296 driver written by: * Jon Grierson * and the experimental cb_pcidio driver written by: * Yoshiya Matsuzaka * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 2000 David A. Schleef * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Driver: 8255_pci Description: Generic PCI based 8255 Digital I/O boards Devices: (ADLink) PCI-7224 [adl_pci-7224] - 24 channels (ADLink) PCI-7248 [adl_pci-7248] - 48 channels (ADLink) PCI-7296 [adl_pci-7296] - 96 channels (Measurement Computing) PCI-DIO24 [cb_pci-dio24] - 24 channels (Measurement Computing) PCI-DIO24H [cb_pci-dio24h] - 24 channels (Measurement Computing) PCI-DIO48H [cb_pci-dio48h] - 48 channels (Measurement Computing) PCI-DIO96H [cb_pci-dio96h] - 96 channels (National Instruments) PCI-DIO-96 [ni_pci-dio-96] - 96 channels (National Instruments) PCI-DIO-96B [ni_pci-dio-96b] - 96 channels (National Instruments) PXI-6508 [ni_pxi-6508] - 96 channels (National Instruments) PCI-6503 [ni_pci-6503] - 24 channels (National Instruments) PCI-6503B [ni_pci-6503b] - 24 channels (National Instruments) PCI-6503X [ni_pci-6503x] - 24 channels (National Instruments) PXI-6503 [ni_pxi-6503] - 24 channels Author: H Hartley Sweeten Updated: Wed, 12 Sep 2012 11:52:01 -0700 Status: untested Some of these boards also have an 8254 programmable timer/counter chip. This chip is not currently supported by this driver. Interrupt support for these boards is also not currently supported. Configuration Options: not applicable, uses PCI auto config */ #include #include "../comedidev.h" #include "8255.h" enum pci_8255_boardid { BOARD_ADLINK_PCI7224, BOARD_ADLINK_PCI7248, BOARD_ADLINK_PCI7296, BOARD_CB_PCIDIO24, BOARD_CB_PCIDIO24H, BOARD_CB_PCIDIO48H_OLD, BOARD_CB_PCIDIO48H_NEW, BOARD_CB_PCIDIO96H, BOARD_NI_PCIDIO96, BOARD_NI_PCIDIO96B, BOARD_NI_PXI6508, BOARD_NI_PCI6503, BOARD_NI_PCI6503B, BOARD_NI_PCI6503X, BOARD_NI_PXI_6503, }; struct pci_8255_boardinfo { const char *name; int dio_badr; int n_8255; }; static const struct pci_8255_boardinfo pci_8255_boards[] = { [BOARD_ADLINK_PCI7224] = { .name = "adl_pci-7224", .dio_badr = 2, .n_8255 = 1, }, [BOARD_ADLINK_PCI7248] = { .name = "adl_pci-7248", .dio_badr = 2, .n_8255 = 2, }, [BOARD_ADLINK_PCI7296] = { .name = "adl_pci-7296", .dio_badr = 2, .n_8255 = 4, }, [BOARD_CB_PCIDIO24] = { .name = "cb_pci-dio24", .dio_badr = 2, .n_8255 = 1, }, [BOARD_CB_PCIDIO24H] = { .name = "cb_pci-dio24h", .dio_badr = 2, .n_8255 = 1, }, [BOARD_CB_PCIDIO48H_OLD] = { .name = "cb_pci-dio48h", .dio_badr = 1, .n_8255 = 2, }, [BOARD_CB_PCIDIO48H_NEW] = { .name = "cb_pci-dio48h", .dio_badr = 2, .n_8255 = 2, }, [BOARD_CB_PCIDIO96H] = { .name = "cb_pci-dio96h", .dio_badr = 2, .n_8255 = 4, }, [BOARD_NI_PCIDIO96] = { .name = "ni_pci-dio-96", .dio_badr = 1, .n_8255 = 4, }, [BOARD_NI_PCIDIO96B] = { .name = "ni_pci-dio-96b", .dio_badr = 1, .n_8255 = 4, }, [BOARD_NI_PXI6508] = { .name = "ni_pxi-6508", .dio_badr = 1, .n_8255 = 4, }, [BOARD_NI_PCI6503] = { .name = "ni_pci-6503", .dio_badr = 1, .n_8255 = 1, }, [BOARD_NI_PCI6503B] = { .name = "ni_pci-6503b", .dio_badr = 1, .n_8255 = 1, }, [BOARD_NI_PCI6503X] = { .name = "ni_pci-6503x", .dio_badr = 1, .n_8255 = 1, }, [BOARD_NI_PXI_6503] = { .name = "ni_pxi-6503", .dio_badr = 1, .n_8255 = 1, }, }; struct pci_8255_private { void __iomem *mmio_base; }; static int pci_8255_mmio(int dir, int port, int data, unsigned long iobase) { void __iomem *mmio_base = (void __iomem *)iobase; if (dir) { writeb(data, mmio_base + port); return 0; } else { return readb(mmio_base + port); } } static int pci_8255_auto_attach(struct comedi_device *dev, unsigned long context) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); const struct pci_8255_boardinfo *board = NULL; struct pci_8255_private *devpriv; struct comedi_subdevice *s; bool is_mmio; int ret; int i; if (context < ARRAY_SIZE(pci_8255_boards)) board = &pci_8255_boards[context]; if (!board) return -ENODEV; dev->board_ptr = board; dev->board_name = board->name; devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL); if (!devpriv) return -ENOMEM; dev->private = devpriv; ret = comedi_pci_enable(dev); if (ret) return ret; is_mmio = (pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM) != 0; if (is_mmio) { devpriv->mmio_base = pci_ioremap_bar(pcidev, board->dio_badr); if (!devpriv->mmio_base) return -ENOMEM; } else { dev->iobase = pci_resource_start(pcidev, board->dio_badr); } /* * One, two, or four subdevices are setup by this driver depending * on the number of channels provided by the board. Each subdevice * has 24 channels supported by the 8255 module. */ ret = comedi_alloc_subdevices(dev, board->n_8255); if (ret) return ret; for (i = 0; i < board->n_8255; i++) { unsigned long iobase; s = &dev->subdevices[i]; if (is_mmio) { iobase = (unsigned long)(devpriv->mmio_base + (i * 4)); ret = subdev_8255_init(dev, s, pci_8255_mmio, iobase); } else { iobase = dev->iobase + (i * 4); ret = subdev_8255_init(dev, s, NULL, iobase); } if (ret) return ret; } dev_info(dev->class_dev, "%s attached (%d digital i/o channels)\n", dev->board_name, board->n_8255 * 24); return 0; } static void pci_8255_detach(struct comedi_device *dev) { struct pci_8255_private *devpriv = dev->private; int i; for (i = 0; i < dev->n_subdevices; i++) comedi_spriv_free(dev, i); if (devpriv && devpriv->mmio_base) iounmap(devpriv->mmio_base); comedi_pci_disable(dev); } static struct comedi_driver pci_8255_driver = { .driver_name = "8255_pci", .module = THIS_MODULE, .auto_attach = pci_8255_auto_attach, .detach = pci_8255_detach, }; static int pci_8255_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data); } static DEFINE_PCI_DEVICE_TABLE(pci_8255_pci_table) = { { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 }, { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 }, { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 }, { PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 }, { PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H }, { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, 0x0000, 0x0000), .driver_data = BOARD_CB_PCIDIO48H_OLD }, { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b), .driver_data = BOARD_CB_PCIDIO48H_NEW }, { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H }, { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 }, { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B }, { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 }, { PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 }, { PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B }, { PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X }, { PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 }, { 0 } }; MODULE_DEVICE_TABLE(pci, pci_8255_pci_table); static struct pci_driver pci_8255_pci_driver = { .name = "8255_pci", .id_table = pci_8255_pci_table, .probe = pci_8255_pci_probe, .remove = comedi_pci_auto_unconfig, }; module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver); MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards"); MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_LICENSE("GPL");