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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), PCI-6216
 23  * Author: nsyeow <nsyeow@pd.jaring.my>
 24  * Updated: Wed, 11 Feb 2015 11:37:18 +0000
 25  * Status: untested
 26  *
 27  * Configuration Options: not applicable, uses PCI auto config
 28  *
 29  * All supported devices share the same PCI device ID and are treated as a
 30  * PCI-6216 with 16 analog output channels.  On a PCI-6208, the upper 8
 31  * channels exist in registers, but don't go to DAC chips.
 32  */
 33 
 34 #include <linux/module.h>
 35 #include <linux/delay.h>
 36 
 37 #include "../comedi_pci.h"
 38 
 39 /*
 40  * PCI-6208/6216-GL register map
 41  */
 42 #define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
 43 #define PCI6208_AO_STATUS               0x00
 44 #define PCI6208_AO_STATUS_DATA_SEND     (1 << 0)
 45 #define PCI6208_DIO                     0x40
 46 #define PCI6208_DIO_DO_MASK             (0x0f)
 47 #define PCI6208_DIO_DO_SHIFT            (0)
 48 #define PCI6208_DIO_DI_MASK             (0xf0)
 49 #define PCI6208_DIO_DI_SHIFT            (4)
 50 
 51 static int pci6208_ao_eoc(struct comedi_device *dev,
 52                           struct comedi_subdevice *s,
 53                           struct comedi_insn *insn,
 54                           unsigned long context)
 55 {
 56         unsigned int status;
 57 
 58         status = inw(dev->iobase + PCI6208_AO_STATUS);
 59         if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
 60                 return 0;
 61         return -EBUSY;
 62 }
 63 
 64 static int pci6208_ao_insn_write(struct comedi_device *dev,
 65                                  struct comedi_subdevice *s,
 66                                  struct comedi_insn *insn,
 67                                  unsigned int *data)
 68 {
 69         unsigned int chan = CR_CHAN(insn->chanspec);
 70         unsigned int val = s->readback[chan];
 71         int ret;
 72         int i;
 73 
 74         for (i = 0; i < insn->n; i++) {
 75                 val = data[i];
 76 
 77                 /* D/A transfer rate is 2.2us */
 78                 ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
 79                 if (ret)
 80                         return ret;
 81 
 82                 /* the hardware expects two's complement values */
 83                 outw(comedi_offset_munge(s, val),
 84                      dev->iobase + PCI6208_AO_CONTROL(chan));
 85 
 86                 s->readback[chan] = val;
 87         }
 88 
 89         return insn->n;
 90 }
 91 
 92 static int pci6208_di_insn_bits(struct comedi_device *dev,
 93                                 struct comedi_subdevice *s,
 94                                 struct comedi_insn *insn,
 95                                 unsigned int *data)
 96 {
 97         unsigned int val;
 98 
 99         val = inw(dev->iobase + PCI6208_DIO);
100         val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
101 
102         data[1] = val;
103 
104         return insn->n;
105 }
106 
107 static int pci6208_do_insn_bits(struct comedi_device *dev,
108                                 struct comedi_subdevice *s,
109                                 struct comedi_insn *insn,
110                                 unsigned int *data)
111 {
112         if (comedi_dio_update_state(s, data))
113                 outw(s->state, dev->iobase + PCI6208_DIO);
114 
115         data[1] = s->state;
116 
117         return insn->n;
118 }
119 
120 static int pci6208_auto_attach(struct comedi_device *dev,
121                                unsigned long context_unused)
122 {
123         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
124         struct comedi_subdevice *s;
125         unsigned int val;
126         int ret;
127 
128         ret = comedi_pci_enable(dev);
129         if (ret)
130                 return ret;
131         dev->iobase = pci_resource_start(pcidev, 2);
132 
133         ret = comedi_alloc_subdevices(dev, 3);
134         if (ret)
135                 return ret;
136 
137         s = &dev->subdevices[0];
138         /* analog output subdevice */
139         s->type         = COMEDI_SUBD_AO;
140         s->subdev_flags = SDF_WRITABLE;
141         s->n_chan       = 16;   /* Only 8 usable on PCI-6208 */
142         s->maxdata      = 0xffff;
143         s->range_table  = &range_bipolar10;
144         s->insn_write   = pci6208_ao_insn_write;
145 
146         ret = comedi_alloc_subdev_readback(s);
147         if (ret)
148                 return ret;
149 
150         s = &dev->subdevices[1];
151         /* digital input subdevice */
152         s->type         = COMEDI_SUBD_DI;
153         s->subdev_flags = SDF_READABLE;
154         s->n_chan       = 4;
155         s->maxdata      = 1;
156         s->range_table  = &range_digital;
157         s->insn_bits    = pci6208_di_insn_bits;
158 
159         s = &dev->subdevices[2];
160         /* digital output subdevice */
161         s->type         = COMEDI_SUBD_DO;
162         s->subdev_flags = SDF_WRITABLE;
163         s->n_chan       = 4;
164         s->maxdata      = 1;
165         s->range_table  = &range_digital;
166         s->insn_bits    = pci6208_do_insn_bits;
167 
168         /*
169          * Get the read back signals from the digital outputs
170          * and save it as the initial state for the subdevice.
171          */
172         val = inw(dev->iobase + PCI6208_DIO);
173         val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
174         s->state        = val;
175 
176         return 0;
177 }
178 
179 static struct comedi_driver adl_pci6208_driver = {
180         .driver_name    = "adl_pci6208",
181         .module         = THIS_MODULE,
182         .auto_attach    = pci6208_auto_attach,
183         .detach         = comedi_pci_detach,
184 };
185 
186 static int adl_pci6208_pci_probe(struct pci_dev *dev,
187                                  const struct pci_device_id *id)
188 {
189         return comedi_pci_auto_config(dev, &adl_pci6208_driver,
190                                       id->driver_data);
191 }
192 
193 static const struct pci_device_id adl_pci6208_pci_table[] = {
194         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x6208) },
195         { PCI_DEVICE_SUB(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
196                          0x9999, 0x6208) },
197         { 0 }
198 };
199 MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
200 
201 static struct pci_driver adl_pci6208_pci_driver = {
202         .name           = "adl_pci6208",
203         .id_table       = adl_pci6208_pci_table,
204         .probe          = adl_pci6208_pci_probe,
205         .remove         = comedi_pci_auto_unconfig,
206 };
207 module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
208 
209 MODULE_AUTHOR("Comedi http://www.comedi.org");
210 MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
211 MODULE_LICENSE("GPL");
212 

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