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Linux/drivers/staging/comedi/drivers/ni_670x.c

  1 /*
  2     comedi/drivers/ni_670x.c
  3     Hardware driver for NI 670x devices
  4 
  5     COMEDI - Linux Control and Measurement Device Interface
  6     Copyright (C) 1997-2001 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 Driver: ni_670x
 20 Description: National Instruments 670x
 21 Author: Bart Joris <bjoris@advalvas.be>
 22 Updated: Wed, 11 Dec 2002 18:25:35 -0800
 23 Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
 24 Status: unknown
 25 
 26 Commands are not supported.
 27 */
 28 
 29 /*
 30         Bart Joris <bjoris@advalvas.be> Last updated on 20/08/2001
 31 
 32         Manuals:
 33 
 34         322110a.pdf     PCI/PXI-6704 User Manual
 35         322110b.pdf     PCI/PXI-6703/6704 User Manual
 36 
 37 */
 38 
 39 #include <linux/module.h>
 40 #include <linux/interrupt.h>
 41 #include <linux/slab.h>
 42 
 43 #include "../comedi_pci.h"
 44 
 45 #define AO_VALUE_OFFSET                 0x00
 46 #define AO_CHAN_OFFSET                  0x0c
 47 #define AO_STATUS_OFFSET                0x10
 48 #define AO_CONTROL_OFFSET               0x10
 49 #define DIO_PORT0_DIR_OFFSET    0x20
 50 #define DIO_PORT0_DATA_OFFSET   0x24
 51 #define DIO_PORT1_DIR_OFFSET    0x28
 52 #define DIO_PORT1_DATA_OFFSET   0x2c
 53 #define MISC_STATUS_OFFSET              0x14
 54 #define MISC_CONTROL_OFFSET             0x14
 55 
 56 enum ni_670x_boardid {
 57         BOARD_PCI6703,
 58         BOARD_PXI6704,
 59         BOARD_PCI6704,
 60 };
 61 
 62 struct ni_670x_board {
 63         const char *name;
 64         unsigned short ao_chans;
 65 };
 66 
 67 static const struct ni_670x_board ni_670x_boards[] = {
 68         [BOARD_PCI6703] = {
 69                 .name           = "PCI-6703",
 70                 .ao_chans       = 16,
 71         },
 72         [BOARD_PXI6704] = {
 73                 .name           = "PXI-6704",
 74                 .ao_chans       = 32,
 75         },
 76         [BOARD_PCI6704] = {
 77                 .name           = "PCI-6704",
 78                 .ao_chans       = 32,
 79         },
 80 };
 81 
 82 struct ni_670x_private {
 83         int boardtype;
 84         int dio;
 85 };
 86 
 87 static int ni_670x_ao_insn_write(struct comedi_device *dev,
 88                                  struct comedi_subdevice *s,
 89                                  struct comedi_insn *insn,
 90                                  unsigned int *data)
 91 {
 92         unsigned int chan = CR_CHAN(insn->chanspec);
 93         unsigned int val = s->readback[chan];
 94         int i;
 95 
 96         /*
 97          * Channel number mapping:
 98          *
 99          * NI 6703/ NI 6704 | NI 6704 Only
100          * -------------------------------
101          * vch(0)  :  0     | ich(16) :  1
102          * vch(1)  :  2     | ich(17) :  3
103          * ...              | ...
104          * vch(15) : 30     | ich(31) : 31
105          */
106         for (i = 0; i < insn->n; i++) {
107                 val = data[i];
108                 /* First write in channel register which channel to use */
109                 writel(((chan & 15) << 1) | ((chan & 16) >> 4),
110                        dev->mmio + AO_CHAN_OFFSET);
111                 /* write channel value */
112                 writel(val, dev->mmio + AO_VALUE_OFFSET);
113         }
114         s->readback[chan] = val;
115 
116         return insn->n;
117 }
118 
119 static int ni_670x_dio_insn_bits(struct comedi_device *dev,
120                                  struct comedi_subdevice *s,
121                                  struct comedi_insn *insn,
122                                  unsigned int *data)
123 {
124         if (comedi_dio_update_state(s, data))
125                 writel(s->state, dev->mmio + DIO_PORT0_DATA_OFFSET);
126 
127         data[1] = readl(dev->mmio + DIO_PORT0_DATA_OFFSET);
128 
129         return insn->n;
130 }
131 
132 static int ni_670x_dio_insn_config(struct comedi_device *dev,
133                                    struct comedi_subdevice *s,
134                                    struct comedi_insn *insn,
135                                    unsigned int *data)
136 {
137         int ret;
138 
139         ret = comedi_dio_insn_config(dev, s, insn, data, 0);
140         if (ret)
141                 return ret;
142 
143         writel(s->io_bits, dev->mmio + DIO_PORT0_DIR_OFFSET);
144 
145         return insn->n;
146 }
147 
148 /* ripped from mite.h and mite_setup2() to avoid mite dependency */
149 #define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
150 #define WENAB           (1 << 7) /* window enable */
151 
152 static int ni_670x_mite_init(struct pci_dev *pcidev)
153 {
154         void __iomem *mite_base;
155         u32 main_phys_addr;
156 
157         /* ioremap the MITE registers (BAR 0) temporarily */
158         mite_base = pci_ioremap_bar(pcidev, 0);
159         if (!mite_base)
160                 return -ENOMEM;
161 
162         /* set data window to main registers (BAR 1) */
163         main_phys_addr = pci_resource_start(pcidev, 1);
164         writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
165 
166         /* finished with MITE registers */
167         iounmap(mite_base);
168         return 0;
169 }
170 
171 static int ni_670x_auto_attach(struct comedi_device *dev,
172                                unsigned long context)
173 {
174         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
175         const struct ni_670x_board *thisboard = NULL;
176         struct ni_670x_private *devpriv;
177         struct comedi_subdevice *s;
178         int ret;
179         int i;
180 
181         if (context < ARRAY_SIZE(ni_670x_boards))
182                 thisboard = &ni_670x_boards[context];
183         if (!thisboard)
184                 return -ENODEV;
185         dev->board_ptr = thisboard;
186         dev->board_name = thisboard->name;
187 
188         ret = comedi_pci_enable(dev);
189         if (ret)
190                 return ret;
191 
192         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
193         if (!devpriv)
194                 return -ENOMEM;
195 
196         ret = ni_670x_mite_init(pcidev);
197         if (ret)
198                 return ret;
199 
200         dev->mmio = pci_ioremap_bar(pcidev, 1);
201         if (!dev->mmio)
202                 return -ENOMEM;
203 
204         ret = comedi_alloc_subdevices(dev, 2);
205         if (ret)
206                 return ret;
207 
208         s = &dev->subdevices[0];
209         /* analog output subdevice */
210         s->type = COMEDI_SUBD_AO;
211         s->subdev_flags = SDF_WRITABLE;
212         s->n_chan = thisboard->ao_chans;
213         s->maxdata = 0xffff;
214         if (s->n_chan == 32) {
215                 const struct comedi_lrange **range_table_list;
216 
217                 range_table_list = kmalloc(sizeof(struct comedi_lrange *) * 32,
218                                            GFP_KERNEL);
219                 if (!range_table_list)
220                         return -ENOMEM;
221                 s->range_table_list = range_table_list;
222                 for (i = 0; i < 16; i++) {
223                         range_table_list[i] = &range_bipolar10;
224                         range_table_list[16 + i] = &range_0_20mA;
225                 }
226         } else {
227                 s->range_table = &range_bipolar10;
228         }
229         s->insn_write = ni_670x_ao_insn_write;
230 
231         ret = comedi_alloc_subdev_readback(s);
232         if (ret)
233                 return ret;
234 
235         s = &dev->subdevices[1];
236         /* digital i/o subdevice */
237         s->type = COMEDI_SUBD_DIO;
238         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
239         s->n_chan = 8;
240         s->maxdata = 1;
241         s->range_table = &range_digital;
242         s->insn_bits = ni_670x_dio_insn_bits;
243         s->insn_config = ni_670x_dio_insn_config;
244 
245         /* Config of misc registers */
246         writel(0x10, dev->mmio + MISC_CONTROL_OFFSET);
247         /* Config of ao registers */
248         writel(0x00, dev->mmio + AO_CONTROL_OFFSET);
249 
250         return 0;
251 }
252 
253 static void ni_670x_detach(struct comedi_device *dev)
254 {
255         struct comedi_subdevice *s;
256 
257         comedi_pci_detach(dev);
258         if (dev->n_subdevices) {
259                 s = &dev->subdevices[0];
260                 if (s)
261                         kfree(s->range_table_list);
262         }
263 }
264 
265 static struct comedi_driver ni_670x_driver = {
266         .driver_name    = "ni_670x",
267         .module         = THIS_MODULE,
268         .auto_attach    = ni_670x_auto_attach,
269         .detach         = ni_670x_detach,
270 };
271 
272 static int ni_670x_pci_probe(struct pci_dev *dev,
273                              const struct pci_device_id *id)
274 {
275         return comedi_pci_auto_config(dev, &ni_670x_driver, id->driver_data);
276 }
277 
278 static const struct pci_device_id ni_670x_pci_table[] = {
279         { PCI_VDEVICE(NI, 0x1290), BOARD_PCI6704 },
280         { PCI_VDEVICE(NI, 0x1920), BOARD_PXI6704 },
281         { PCI_VDEVICE(NI, 0x2c90), BOARD_PCI6703 },
282         { 0 }
283 };
284 MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
285 
286 static struct pci_driver ni_670x_pci_driver = {
287         .name           = "ni_670x",
288         .id_table       = ni_670x_pci_table,
289         .probe          = ni_670x_pci_probe,
290         .remove         = comedi_pci_auto_unconfig,
291 };
292 module_comedi_pci_driver(ni_670x_driver, ni_670x_pci_driver);
293 
294 MODULE_AUTHOR("Comedi http://www.comedi.org");
295 MODULE_DESCRIPTION("Comedi low-level driver");
296 MODULE_LICENSE("GPL");
297 

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