ni_daq_dio24.c revision 112215012f42e2db1f7e2965e25936c4809e89b1
1/* 2 comedi/drivers/ni_daq_dio24.c 3 Driver for National Instruments PCMCIA DAQ-Card DIO-24 4 Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es> 5 6 PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13 7 from the pcmcia package. 8 The initial developer of the pcmcia dummy_cs.c code is David A. Hinds 9 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 10 are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 11 12 This program is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 2 of the License, or 15 (at your option) any later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 26************************************************************************ 27*/ 28/* 29Driver: ni_daq_dio24 30Description: National Instruments PCMCIA DAQ-Card DIO-24 31Author: Daniel Vecino Castel <dvecino@able.es> 32Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24) 33Status: ? 34Updated: Thu, 07 Nov 2002 21:53:06 -0800 35 36This is just a wrapper around the 8255.o driver to properly handle 37the PCMCIA interface. 38*/ 39 40 /* #define LABPC_DEBUG *//* enable debugging messages */ 41#undef LABPC_DEBUG 42 43#include <linux/interrupt.h> 44#include <linux/slab.h> 45#include "../comedidev.h" 46 47#include <linux/ioport.h> 48 49#include "8255.h" 50 51#include <pcmcia/cistpl.h> 52#include <pcmcia/cisreg.h> 53#include <pcmcia/ds.h> 54 55static struct pcmcia_device *pcmcia_cur_dev; 56 57#define DIO24_SIZE 4 /* size of io region used by board */ 58 59static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it); 60static void dio24_detach(struct comedi_device *dev); 61 62enum dio24_bustype { pcmcia_bustype }; 63 64struct dio24_board_struct { 65 const char *name; 66 int device_id; /* device id for pcmcia board */ 67 enum dio24_bustype bustype; /* PCMCIA */ 68 int have_dio; /* have 8255 chip */ 69 /* function pointers so we can use inb/outb or readb/writeb as appropriate */ 70 unsigned int (*read_byte) (unsigned int address); 71 void (*write_byte) (unsigned int byte, unsigned int address); 72}; 73 74static const struct dio24_board_struct dio24_boards[] = { 75 { 76 .name = "daqcard-dio24", 77 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 78 .bustype = pcmcia_bustype, 79 .have_dio = 1, 80 }, 81 { 82 .name = "ni_daq_dio24", 83 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */ 84 .bustype = pcmcia_bustype, 85 .have_dio = 1, 86 }, 87}; 88 89/* 90 * Useful for shorthand access to the particular board structure 91 */ 92#define thisboard ((const struct dio24_board_struct *)dev->board_ptr) 93 94struct dio24_private { 95 96 int data; /* number of data points left to be taken */ 97}; 98 99static struct comedi_driver driver_dio24 = { 100 .driver_name = "ni_daq_dio24", 101 .module = THIS_MODULE, 102 .attach = dio24_attach, 103 .detach = dio24_detach, 104 .num_names = ARRAY_SIZE(dio24_boards), 105 .board_name = &dio24_boards[0].name, 106 .offset = sizeof(struct dio24_board_struct), 107}; 108 109static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it) 110{ 111 struct dio24_private *devpriv; 112 struct comedi_subdevice *s; 113 unsigned long iobase = 0; 114#ifdef incomplete 115 unsigned int irq = 0; 116#endif 117 struct pcmcia_device *link; 118 int ret; 119 120 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL); 121 if (!devpriv) 122 return -ENOMEM; 123 dev->private = devpriv; 124 125 /* get base address, irq etc. based on bustype */ 126 switch (thisboard->bustype) { 127 case pcmcia_bustype: 128 link = pcmcia_cur_dev; /* XXX hack */ 129 if (!link) 130 return -EIO; 131 iobase = link->resource[0]->start; 132#ifdef incomplete 133 irq = link->irq; 134#endif 135 break; 136 default: 137 pr_err("bug! couldn't determine board type\n"); 138 return -EINVAL; 139 break; 140 } 141 pr_debug("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor, 142 thisboard->name, iobase); 143#ifdef incomplete 144 if (irq) 145 pr_debug("irq %u\n", irq); 146#endif 147 148 if (iobase == 0) { 149 pr_err("io base address is zero!\n"); 150 return -EINVAL; 151 } 152 153 dev->iobase = iobase; 154 155#ifdef incomplete 156 /* grab our IRQ */ 157 dev->irq = irq; 158#endif 159 160 dev->board_name = thisboard->name; 161 162 ret = comedi_alloc_subdevices(dev, 1); 163 if (ret) 164 return ret; 165 166 /* 8255 dio */ 167 s = &dev->subdevices[0]; 168 subdev_8255_init(dev, s, NULL, dev->iobase); 169 170 return 0; 171}; 172 173static void dio24_detach(struct comedi_device *dev) 174{ 175 struct comedi_subdevice *s; 176 177 if (dev->subdevices) { 178 s = &dev->subdevices[0]; 179 subdev_8255_cleanup(dev, s); 180 } 181 if (thisboard->bustype != pcmcia_bustype && dev->iobase) 182 release_region(dev->iobase, DIO24_SIZE); 183 if (dev->irq) 184 free_irq(dev->irq, dev); 185}; 186 187static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev, 188 void *priv_data) 189{ 190 if (p_dev->config_index == 0) 191 return -EINVAL; 192 193 return pcmcia_request_io(p_dev); 194} 195 196static int dio24_cs_attach(struct pcmcia_device *link) 197{ 198 int ret; 199 200 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO | 201 CONF_AUTO_SET_IO; 202 203 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL); 204 if (ret) { 205 dev_warn(&link->dev, "no configuration found\n"); 206 goto failed; 207 } 208 209 if (!link->irq) 210 goto failed; 211 212 ret = pcmcia_enable_device(link); 213 if (ret) 214 goto failed; 215 216 pcmcia_cur_dev = link; 217 218 return 0; 219 220failed: 221 pcmcia_disable_device(link); 222 return ret; 223} 224 225static void dio24_cs_detach(struct pcmcia_device *link) 226{ 227 pcmcia_disable_device(link); 228} 229 230static const struct pcmcia_device_id dio24_cs_ids[] = { 231 /* N.B. These IDs should match those in dio24_boards */ 232 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */ 233 PCMCIA_DEVICE_NULL 234}; 235MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids); 236 237static struct pcmcia_driver dio24_cs_driver = { 238 .name = "ni_daq_dio24", 239 .owner = THIS_MODULE, 240 .id_table = dio24_cs_ids, 241 .probe = dio24_cs_attach, 242 .remove = dio24_cs_detach, 243}; 244module_comedi_pcmcia_driver(driver_dio24, dio24_cs_driver); 245 246MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>"); 247MODULE_DESCRIPTION( 248 "Comedi driver for National Instruments PCMCIA DAQ-Card DIO-24"); 249MODULE_LICENSE("GPL"); 250