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Linux/drivers/staging/comedi/drivers/adl_pci6208.c

  1 /*
  2  * adl_pci6208.c
  3  * Comedi driver for ADLink 6208 series cards
  4  *
  5  * COMEDI - Linux Control and Measurement Device Interface
  6  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License as published by
 10  * the Free Software Foundation; either version 2 of the License, or
 11  * (at your option) any later version.
 12  *
 13  * This program is distributed in the hope that it will be useful,
 14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  * GNU General Public License for more details.
 17  */
 18 
 19 /*
 20  * Driver: adl_pci6208
 21  * Description: ADLink PCI-6208/6216 Series Multi-channel Analog Output Cards
 22  * Devices: (ADLink) PCI-6208 [adl_pci6208]
 23  *          (ADLink) PCI-6216 [adl_pci6216]
 24  * Author: nsyeow <nsyeow@pd.jaring.my>
 25  * Updated: Fri, 30 Jan 2004 14:44:27 +0800
 26  * Status: untested
 27  *
 28  * Configuration Options: not applicable, uses PCI auto config
 29  */
 30 
 31 #include <linux/module.h>
 32 #include <linux/delay.h>
 33 #include <linux/pci.h>
 34 
 35 #include "../comedidev.h"
 36 
 37 /*
 38  * PCI-6208/6216-GL register map
 39  */
 40 #define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
 41 #define PCI6208_AO_STATUS               0x00
 42 #define PCI6208_AO_STATUS_DATA_SEND     (1 << 0)
 43 #define PCI6208_DIO                     0x40
 44 #define PCI6208_DIO_DO_MASK             (0x0f)
 45 #define PCI6208_DIO_DO_SHIFT            (0)
 46 #define PCI6208_DIO_DI_MASK             (0xf0)
 47 #define PCI6208_DIO_DI_SHIFT            (4)
 48 
 49 enum pci6208_boardid {
 50         BOARD_PCI6208,
 51         BOARD_PCI6216,
 52 };
 53 
 54 struct pci6208_board {
 55         const char *name;
 56         int ao_chans;
 57 };
 58 
 59 static const struct pci6208_board pci6208_boards[] = {
 60         [BOARD_PCI6208] = {
 61                 .name           = "adl_pci6208",
 62                 .ao_chans       = 8,
 63         },
 64         [BOARD_PCI6216] = {
 65                 .name           = "adl_pci6216",
 66                 .ao_chans       = 16,
 67         },
 68 };
 69 
 70 static int pci6208_ao_eoc(struct comedi_device *dev,
 71                           struct comedi_subdevice *s,
 72                           struct comedi_insn *insn,
 73                           unsigned long context)
 74 {
 75         unsigned int status;
 76 
 77         status = inw(dev->iobase + PCI6208_AO_STATUS);
 78         if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
 79                 return 0;
 80         return -EBUSY;
 81 }
 82 
 83 static int pci6208_ao_insn_write(struct comedi_device *dev,
 84                                  struct comedi_subdevice *s,
 85                                  struct comedi_insn *insn,
 86                                  unsigned int *data)
 87 {
 88         unsigned int chan = CR_CHAN(insn->chanspec);
 89         unsigned int val = s->readback[chan];
 90         int ret;
 91         int i;
 92 
 93         for (i = 0; i < insn->n; i++) {
 94                 val = data[i];
 95 
 96                 /* D/A transfer rate is 2.2us */
 97                 ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
 98                 if (ret)
 99                         return ret;
100 
101                 /* the hardware expects two's complement values */
102                 outw(comedi_offset_munge(s, val),
103                      dev->iobase + PCI6208_AO_CONTROL(chan));
104 
105                 s->readback[chan] = val;
106         }
107 
108         return insn->n;
109 }
110 
111 static int pci6208_di_insn_bits(struct comedi_device *dev,
112                                 struct comedi_subdevice *s,
113                                 struct comedi_insn *insn,
114                                 unsigned int *data)
115 {
116         unsigned int val;
117 
118         val = inw(dev->iobase + PCI6208_DIO);
119         val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
120 
121         data[1] = val;
122 
123         return insn->n;
124 }
125 
126 static int pci6208_do_insn_bits(struct comedi_device *dev,
127                                 struct comedi_subdevice *s,
128                                 struct comedi_insn *insn,
129                                 unsigned int *data)
130 {
131         if (comedi_dio_update_state(s, data))
132                 outw(s->state, dev->iobase + PCI6208_DIO);
133 
134         data[1] = s->state;
135 
136         return insn->n;
137 }
138 
139 static int pci6208_auto_attach(struct comedi_device *dev,
140                                unsigned long context)
141 {
142         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
143         const struct pci6208_board *boardinfo = NULL;
144         struct comedi_subdevice *s;
145         unsigned int val;
146         int ret;
147 
148         if (context < ARRAY_SIZE(pci6208_boards))
149                 boardinfo = &pci6208_boards[context];
150         if (!boardinfo)
151                 return -ENODEV;
152         dev->board_ptr = boardinfo;
153         dev->board_name = boardinfo->name;
154 
155         ret = comedi_pci_enable(dev);
156         if (ret)
157                 return ret;
158         dev->iobase = pci_resource_start(pcidev, 2);
159 
160         ret = comedi_alloc_subdevices(dev, 3);
161         if (ret)
162                 return ret;
163 
164         s = &dev->subdevices[0];
165         /* analog output subdevice */
166         s->type         = COMEDI_SUBD_AO;
167         s->subdev_flags = SDF_WRITABLE;
168         s->n_chan       = boardinfo->ao_chans;
169         s->maxdata      = 0xffff;
170         s->range_table  = &range_bipolar10;
171         s->insn_write   = pci6208_ao_insn_write;
172         s->insn_read    = comedi_readback_insn_read;
173 
174         ret = comedi_alloc_subdev_readback(s);
175         if (ret)
176                 return ret;
177 
178         s = &dev->subdevices[1];
179         /* digital input subdevice */
180         s->type         = COMEDI_SUBD_DI;
181         s->subdev_flags = SDF_READABLE;
182         s->n_chan       = 4;
183         s->maxdata      = 1;
184         s->range_table  = &range_digital;
185         s->insn_bits    = pci6208_di_insn_bits;
186 
187         s = &dev->subdevices[2];
188         /* digital output subdevice */
189         s->type         = COMEDI_SUBD_DO;
190         s->subdev_flags = SDF_WRITABLE;
191         s->n_chan       = 4;
192         s->maxdata      = 1;
193         s->range_table  = &range_digital;
194         s->insn_bits    = pci6208_do_insn_bits;
195 
196         /*
197          * Get the read back signals from the digital outputs
198          * and save it as the initial state for the subdevice.
199          */
200         val = inw(dev->iobase + PCI6208_DIO);
201         val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
202         s->state        = val;
203 
204         return 0;
205 }
206 
207 static struct comedi_driver adl_pci6208_driver = {
208         .driver_name    = "adl_pci6208",
209         .module         = THIS_MODULE,
210         .auto_attach    = pci6208_auto_attach,
211         .detach         = comedi_pci_detach,
212 };
213 
214 static int adl_pci6208_pci_probe(struct pci_dev *dev,
215                                  const struct pci_device_id *id)
216 {
217         return comedi_pci_auto_config(dev, &adl_pci6208_driver,
218                                       id->driver_data);
219 }
220 
221 static const struct pci_device_id adl_pci6208_pci_table[] = {
222         { PCI_VDEVICE(ADLINK, 0x6208), BOARD_PCI6208 },
223         { PCI_VDEVICE(ADLINK, 0x6216), BOARD_PCI6216 },
224         { 0 }
225 };
226 MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
227 
228 static struct pci_driver adl_pci6208_pci_driver = {
229         .name           = "adl_pci6208",
230         .id_table       = adl_pci6208_pci_table,
231         .probe          = adl_pci6208_pci_probe,
232         .remove         = comedi_pci_auto_unconfig,
233 };
234 module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
235 
236 MODULE_AUTHOR("Comedi http://www.comedi.org");
237 MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
238 MODULE_LICENSE("GPL");
239 

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