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Linux/drivers/staging/comedi/drivers/ke_counter.c

  1 /*
  2  * ke_counter.c
  3  * Comedi driver for Kolter-Electronic PCI Counter 1 Card
  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: ke_counter
 21  * Description: Driver for Kolter Electronic Counter Card
 22  * Devices: (Kolter Electronic) PCI Counter Card [ke_counter]
 23  * Author: Michael Hillmann
 24  * Updated: Mon, 14 Apr 2008 15:42:42 +0100
 25  * Status: tested
 26  *
 27  * Configuration Options: not applicable, uses PCI auto config
 28  */
 29 
 30 #include <linux/module.h>
 31 #include <linux/pci.h>
 32 
 33 #include "../comedidev.h"
 34 
 35 /*
 36  * PCI BAR 0 Register I/O map
 37  */
 38 #define KE_RESET_REG(x)                 (0x00 + ((x) * 0x20))
 39 #define KE_LATCH_REG(x)                 (0x00 + ((x) * 0x20))
 40 #define KE_LSB_REG(x)                   (0x04 + ((x) * 0x20))
 41 #define KE_MID_REG(x)                   (0x08 + ((x) * 0x20))
 42 #define KE_MSB_REG(x)                   (0x0c + ((x) * 0x20))
 43 #define KE_SIGN_REG(x)                  (0x10 + ((x) * 0x20))
 44 #define KE_OSC_SEL_REG                  0xf8
 45 #define KE_OSC_SEL_EXT                  (1 << 0)
 46 #define KE_OSC_SEL_4MHZ                 (2 << 0)
 47 #define KE_OSC_SEL_20MHZ                (3 << 0)
 48 #define KE_DO_REG                       0xfc
 49 
 50 static int ke_counter_insn_write(struct comedi_device *dev,
 51                                  struct comedi_subdevice *s,
 52                                  struct comedi_insn *insn,
 53                                  unsigned int *data)
 54 {
 55         unsigned int chan = CR_CHAN(insn->chanspec);
 56         unsigned int val;
 57         int i;
 58 
 59         for (i = 0; i < insn->n; i++) {
 60                 val = data[0];
 61 
 62                 /* Order matters */
 63                 outb((val >> 24) & 0xff, dev->iobase + KE_SIGN_REG(chan));
 64                 outb((val >> 16) & 0xff, dev->iobase + KE_MSB_REG(chan));
 65                 outb((val >> 8) & 0xff, dev->iobase + KE_MID_REG(chan));
 66                 outb((val >> 0) & 0xff, dev->iobase + KE_LSB_REG(chan));
 67         }
 68 
 69         return insn->n;
 70 }
 71 
 72 static int ke_counter_insn_read(struct comedi_device *dev,
 73                                 struct comedi_subdevice *s,
 74                                 struct comedi_insn *insn,
 75                                 unsigned int *data)
 76 {
 77         unsigned int chan = CR_CHAN(insn->chanspec);
 78         unsigned int val;
 79         int i;
 80 
 81         for (i = 0; i < insn->n; i++) {
 82                 /* Order matters */
 83                 inb(dev->iobase + KE_LATCH_REG(chan));
 84 
 85                 val = inb(dev->iobase + KE_LSB_REG(chan));
 86                 val |= (inb(dev->iobase + KE_MID_REG(chan)) << 8);
 87                 val |= (inb(dev->iobase + KE_MSB_REG(chan)) << 16);
 88                 val |= (inb(dev->iobase + KE_SIGN_REG(chan)) << 24);
 89 
 90                 data[i] = val;
 91         }
 92 
 93         return insn->n;
 94 }
 95 
 96 static void ke_counter_reset(struct comedi_device *dev)
 97 {
 98         unsigned int chan;
 99 
100         for (chan = 0; chan < 3; chan++)
101                 outb(0, dev->iobase + KE_RESET_REG(chan));
102 }
103 
104 static int ke_counter_insn_config(struct comedi_device *dev,
105                                   struct comedi_subdevice *s,
106                                   struct comedi_insn *insn,
107                                   unsigned int *data)
108 {
109         unsigned char src;
110 
111         switch (data[0]) {
112         case INSN_CONFIG_SET_CLOCK_SRC:
113                 switch (data[1]) {
114                 case KE_CLK_20MHZ:      /* default */
115                         src = KE_OSC_SEL_20MHZ;
116                         break;
117                 case KE_CLK_4MHZ:       /* option */
118                         src = KE_OSC_SEL_4MHZ;
119                         break;
120                 case KE_CLK_EXT:        /* Pin 21 on D-sub */
121                         src = KE_OSC_SEL_EXT;
122                         break;
123                 default:
124                         return -EINVAL;
125                 }
126                 outb(src, dev->iobase + KE_OSC_SEL_REG);
127                 break;
128         case INSN_CONFIG_GET_CLOCK_SRC:
129                 src = inb(dev->iobase + KE_OSC_SEL_REG);
130                 switch (src) {
131                 case KE_OSC_SEL_20MHZ:
132                         data[1] = KE_CLK_20MHZ;
133                         data[2] = 50;   /* 50ns */
134                         break;
135                 case KE_OSC_SEL_4MHZ:
136                         data[1] = KE_CLK_4MHZ;
137                         data[2] = 250;  /* 250ns */
138                         break;
139                 case KE_OSC_SEL_EXT:
140                         data[1] = KE_CLK_EXT;
141                         data[2] = 0;    /* Unknown */
142                         break;
143                 default:
144                         return -EINVAL;
145                 }
146                 break;
147         case INSN_CONFIG_RESET:
148                 ke_counter_reset(dev);
149                 break;
150         default:
151                 return -EINVAL;
152         }
153 
154         return insn->n;
155 }
156 
157 static int ke_counter_do_insn_bits(struct comedi_device *dev,
158                                    struct comedi_subdevice *s,
159                                    struct comedi_insn *insn,
160                                    unsigned int *data)
161 {
162         if (comedi_dio_update_state(s, data))
163                 outb(s->state, dev->iobase + KE_DO_REG);
164 
165         data[1] = s->state;
166 
167         return insn->n;
168 }
169 
170 static int ke_counter_auto_attach(struct comedi_device *dev,
171                                   unsigned long context_unused)
172 {
173         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
174         struct comedi_subdevice *s;
175         int ret;
176 
177         ret = comedi_pci_enable(dev);
178         if (ret)
179                 return ret;
180         dev->iobase = pci_resource_start(pcidev, 0);
181 
182         ret = comedi_alloc_subdevices(dev, 2);
183         if (ret)
184                 return ret;
185 
186         s = &dev->subdevices[0];
187         s->type         = COMEDI_SUBD_COUNTER;
188         s->subdev_flags = SDF_READABLE;
189         s->n_chan       = 3;
190         s->maxdata      = 0x01ffffff;
191         s->range_table  = &range_unknown;
192         s->insn_read    = ke_counter_insn_read;
193         s->insn_write   = ke_counter_insn_write;
194         s->insn_config  = ke_counter_insn_config;
195 
196         s = &dev->subdevices[1];
197         s->type         = COMEDI_SUBD_DO;
198         s->subdev_flags = SDF_WRITABLE;
199         s->n_chan       = 3;
200         s->maxdata      = 1;
201         s->range_table  = &range_digital;
202         s->insn_bits    = ke_counter_do_insn_bits;
203 
204         outb(KE_OSC_SEL_20MHZ, dev->iobase + KE_OSC_SEL_REG);
205 
206         ke_counter_reset(dev);
207 
208         return 0;
209 }
210 
211 static struct comedi_driver ke_counter_driver = {
212         .driver_name    = "ke_counter",
213         .module         = THIS_MODULE,
214         .auto_attach    = ke_counter_auto_attach,
215         .detach         = comedi_pci_disable,
216 };
217 
218 static int ke_counter_pci_probe(struct pci_dev *dev,
219                                 const struct pci_device_id *id)
220 {
221         return comedi_pci_auto_config(dev, &ke_counter_driver,
222                                       id->driver_data);
223 }
224 
225 static const struct pci_device_id ke_counter_pci_table[] = {
226         { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, 0x0014) },
227         { 0 }
228 };
229 MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
230 
231 static struct pci_driver ke_counter_pci_driver = {
232         .name           = "ke_counter",
233         .id_table       = ke_counter_pci_table,
234         .probe          = ke_counter_pci_probe,
235         .remove         = comedi_pci_auto_unconfig,
236 };
237 module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
238 
239 MODULE_AUTHOR("Comedi http://www.comedi.org");
240 MODULE_DESCRIPTION("Comedi driver for Kolter Electronic Counter Card");
241 MODULE_LICENSE("GPL");
242 

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