Staging: comedi: add ni_670x driver

Driver for National Instruments 670x

From: Bart Joris <bjoris@advalvas.be>
Cc: David Schleef <ds@schleef.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/comedi/drivers/ni_670x.c b/drivers/staging/comedi/drivers/ni_670x.c
new file mode 100644 (file)
index 0000000..f622e34
--- /dev/null
+++ b/drivers/staging/comedi/drivers/ni_670x.c
@@ -0,0 +1,334 @@
+/*
+    comedi/drivers/ni_670x.c
+    Hardware driver for NI 670x devices
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+/*
+Driver: ni_670x
+Description: National Instruments 670x
+Author: Bart Joris <bjoris@advalvas.be>
+Updated: Wed, 11 Dec 2002 18:25:35 -0800
+Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
+Status: unknown
+
+Commands are not supported.
+*/
+
+/*
+       Bart Joris <bjoris@advalvas.be> Last updated on 20/08/2001
+
+       Manuals:
+
+       322110a.pdf     PCI/PXI-6704 User Manual
+       322110b.pdf     PCI/PXI-6703/6704 User Manual
+
+*/
+
+#include "../comedidev.h"
+
+#include "mite.h"
+
+#define PCI_VENDOR_ID_NATINST  0x1093
+
+#define AO_VALUE_OFFSET                        0x00
+#define        AO_CHAN_OFFSET                  0x0c
+#define        AO_STATUS_OFFSET                0x10
+#define AO_CONTROL_OFFSET              0x10
+#define        DIO_PORT0_DIR_OFFSET    0x20
+#define        DIO_PORT0_DATA_OFFSET   0x24
+#define        DIO_PORT1_DIR_OFFSET    0x28
+#define        DIO_PORT1_DATA_OFFSET   0x2c
+#define        MISC_STATUS_OFFSET              0x14
+#define        MISC_CONTROL_OFFSET             0x14
+
+/* Board description*/
+
+typedef struct ni_670x_board_struct {
+       unsigned short dev_id;
+       const char *name;
+       unsigned short ao_chans;
+       unsigned short ao_bits;
+} ni_670x_board;
+static const ni_670x_board ni_670x_boards[] = {
+       {
+             dev_id:   0x2c90,
+             name:     "PCI-6703",
+             ao_chans:16,
+             ao_bits:  16,
+               },
+       {
+             dev_id:   0x1920,
+             name:     "PXI-6704",
+             ao_chans:32,
+             ao_bits:  16,
+               },
+       {
+             dev_id:   0x1290,
+             name:     "PCI-6704",
+             ao_chans:32,
+             ao_bits:  16,
+               },
+};
+
+static DEFINE_PCI_DEVICE_TABLE(ni_670x_pci_table) = {
+       {PCI_VENDOR_ID_NATINST, 0x2c90, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+       {PCI_VENDOR_ID_NATINST, 0x1920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+       //{ PCI_VENDOR_ID_NATINST, 0x0000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+       {0}
+};
+
+MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
+
+#define thisboard ((ni_670x_board *)dev->board_ptr)
+
+typedef struct {
+       struct mite_struct *mite;
+       int boardtype;
+       int dio;
+       lsampl_t ao_readback[32];
+} ni_670x_private;
+
+#define devpriv ((ni_670x_private *)dev->private)
+#define n_ni_670x_boards (sizeof(ni_670x_boards)/sizeof(ni_670x_boards[0]))
+
+static int ni_670x_attach(comedi_device * dev, comedi_devconfig * it);
+static int ni_670x_detach(comedi_device * dev);
+
+static comedi_driver driver_ni_670x = {
+      driver_name:"ni_670x",
+      module:THIS_MODULE,
+      attach:ni_670x_attach,
+      detach:ni_670x_detach,
+};
+
+COMEDI_PCI_INITCLEANUP(driver_ni_670x, ni_670x_pci_table);
+
+static comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };
+
+static int ni_670x_find_device(comedi_device * dev, int bus, int slot);
+
+static int ni_670x_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data);
+static int ni_670x_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data);
+static int ni_670x_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data);
+static int ni_670x_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data);
+
+static int ni_670x_attach(comedi_device * dev, comedi_devconfig * it)
+{
+       comedi_subdevice *s;
+       int ret;
+       int i;
+
+       printk("comedi%d: ni_670x: ", dev->minor);
+
+       if ((ret = alloc_private(dev, sizeof(ni_670x_private))) < 0)
+               return ret;
+
+       ret = ni_670x_find_device(dev, it->options[0], it->options[1]);
+       if (ret < 0)
+               return ret;
+
+       ret = mite_setup(devpriv->mite);
+       if (ret < 0) {
+               printk("error setting up mite\n");
+               return ret;
+       }
+       dev->board_name = thisboard->name;
+       dev->irq = mite_irq(devpriv->mite);
+       printk(" %s", dev->board_name);
+
+       if (alloc_subdevices(dev, 2) < 0)
+               return -ENOMEM;
+
+       s = dev->subdevices + 0;
+       /* analog output subdevice */
+       s->type = COMEDI_SUBD_AO;
+       s->subdev_flags = SDF_WRITABLE;
+       s->n_chan = thisboard->ao_chans;
+       s->maxdata = 0xffff;
+       if (s->n_chan == 32) {
+               const comedi_lrange **range_table_list;
+
+               range_table_list = kmalloc(sizeof(comedi_lrange *) * 32,
+                       GFP_KERNEL);
+               if (!range_table_list)
+                       return -ENOMEM;
+               s->range_table_list = range_table_list;
+               for (i = 0; i < 16; i++) {
+                       range_table_list[i] = &range_bipolar10;
+                       range_table_list[16 + i] = &range_0_20mA;
+               }
+       } else {
+               s->range_table = &range_bipolar10;
+       }
+       s->insn_write = &ni_670x_ao_winsn;
+       s->insn_read = &ni_670x_ao_rinsn;
+
+       s = dev->subdevices + 1;
+       /* digital i/o subdevice */
+       s->type = COMEDI_SUBD_DIO;
+       s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+       s->n_chan = 8;
+       s->maxdata = 1;
+       s->range_table = &range_digital;
+       s->insn_bits = ni_670x_dio_insn_bits;
+       s->insn_config = ni_670x_dio_insn_config;
+
+       writel(0x10, devpriv->mite->daq_io_addr + MISC_CONTROL_OFFSET); /* Config of misc registers */
+       writel(0x00, devpriv->mite->daq_io_addr + AO_CONTROL_OFFSET);   /* Config of ao registers */
+
+       printk("attached\n");
+
+       return 1;
+}
+
+static int ni_670x_detach(comedi_device * dev)
+{
+       printk("comedi%d: ni_670x: remove\n", dev->minor);
+
+       if (dev->subdevices[0].range_table_list) {
+               kfree(dev->subdevices[0].range_table_list);
+       }
+       if (dev->private && devpriv->mite)
+               mite_unsetup(devpriv->mite);
+
+       if (dev->irq)
+               comedi_free_irq(dev->irq, dev);
+
+       return 0;
+}
+
+static int ni_670x_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data)
+{
+       int i;
+       int chan = CR_CHAN(insn->chanspec);
+
+       /* Channel number mapping :
+
+          NI 6703/ NI 6704     | NI 6704 Only
+          ----------------------------------------------------
+          vch(0)       :       0       | ich(16)       :       1
+          vch(1)       :       2       | ich(17)       :       3
+          .    :       .       |   .                   .
+          .    :       .       |   .                   .
+          .    :       .       |   .                   .
+          vch(15)      :       30      | ich(31)       :       31      */
+
+       for (i = 0; i < insn->n; i++) {
+               writel(((chan & 15) << 1) | ((chan & 16) >> 4), devpriv->mite->daq_io_addr + AO_CHAN_OFFSET);   /* First write in channel register which channel to use */
+               writel(data[i], devpriv->mite->daq_io_addr + AO_VALUE_OFFSET);  /* write channel value */
+               devpriv->ao_readback[chan] = data[i];
+       }
+
+       return i;
+}
+
+static int ni_670x_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data)
+{
+       int i;
+       int chan = CR_CHAN(insn->chanspec);
+
+       for (i = 0; i < insn->n; i++)
+               data[i] = devpriv->ao_readback[chan];
+
+       return i;
+}
+
+static int ni_670x_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data)
+{
+       if (insn->n != 2)
+               return -EINVAL;
+
+       /* The insn data is a mask in data[0] and the new data
+        * in data[1], each channel cooresponding to a bit. */
+       if (data[0]) {
+               s->state &= ~data[0];
+               s->state |= data[0] & data[1];
+               writel(s->state,
+                       devpriv->mite->daq_io_addr + DIO_PORT0_DATA_OFFSET);
+       }
+
+       /* on return, data[1] contains the value of the digital
+        * input lines. */
+       data[1] = readl(devpriv->mite->daq_io_addr + DIO_PORT0_DATA_OFFSET);
+
+       return 2;
+}
+
+static int ni_670x_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+       comedi_insn * insn, lsampl_t * data)
+{
+       int chan = CR_CHAN(insn->chanspec);
+
+       switch (data[0]) {
+       case INSN_CONFIG_DIO_OUTPUT:
+               s->io_bits |= 1 << chan;
+               break;
+       case INSN_CONFIG_DIO_INPUT:
+               s->io_bits &= ~(1 << chan);
+               break;
+       case INSN_CONFIG_DIO_QUERY:
+               data[1] =
+                       (s->
+                       io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
+               return insn->n;
+               break;
+       default:
+               return -EINVAL;
+               break;
+       }
+       writel(s->io_bits, devpriv->mite->daq_io_addr + DIO_PORT0_DIR_OFFSET);
+
+       return insn->n;
+}
+
+static int ni_670x_find_device(comedi_device * dev, int bus, int slot)
+{
+       struct mite_struct *mite;
+       int i;
+
+       for (mite = mite_devices; mite; mite = mite->next) {
+               if (mite->used)
+                       continue;
+               if (bus || slot) {
+                       if (bus != mite->pcidev->bus->number
+                               || slot != PCI_SLOT(mite->pcidev->devfn))
+                               continue;
+               }
+
+               for (i = 0; i < n_ni_670x_boards; i++) {
+                       if (mite_device_id(mite) == ni_670x_boards[i].dev_id) {
+                               dev->board_ptr = ni_670x_boards + i;
+                               devpriv->mite = mite;
+
+                               return 0;
+                       }
+               }
+       }
+       printk("no device found\n");
+       mite_list_devices();
+       return -EIO;
+}