diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/unioxx5.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/unioxx5.c | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/unioxx5.c b/drivers/staging/comedi/drivers/unioxx5.c new file mode 100644 index 000000000000..dd3b1119319b --- /dev/null +++ b/drivers/staging/comedi/drivers/unioxx5.c @@ -0,0 +1,515 @@ +/*************************************************************************** + * * + * comedi/drivers/unioxx5.c * + * Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. * + * * + * Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru] * + * * + * COMEDI - Linux Control and Measurement Device Interface * + * Copyright (C) 1998,2000 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: unioxx5 +Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. +Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru> +Status: unknown +Updated: 2006-10-09 +Devices: [Fastwel] UNIOxx-5 (unioxx5), + + This card supports digital and analog I/O. It written for g01 + subdevices only. + channels range: 0 .. 23 dio channels + and 0 .. 11 analog modules range + During attaching unioxx5 module displays modules identifiers + (see dmesg after comedi_config) in format: + | [module_number] module_id | + +*/ + +#include "../comedidev.h" +#include <linux/ioport.h> + +#define DRIVER_NAME "unioxx5" +#define UNIOXX5_SIZE 0x10 +#define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */ +#define UNIOXX5_SUBDEV_ODDS 0x400 + +/* modules types */ +#define MODULE_DIGITAL 0 +#define MODULE_OUTPUT_MASK 0x80 /* analog input/output */ + +/* constants for digital i/o */ +#define UNIOXX5_NUM_OF_CHANS 24 + +/* constants for analog i/o */ +#define TxBE 0x10 /* transmit buffer enable */ +#define RxCA 0x20 /* 1 receive character available */ +#define Rx2CA 0x40 /* 2 receive character available */ +#define Rx4CA 0x80 /* 4 receive character available */ + +/* bytes mask errors */ +#define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */ +#define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */ + +/* channel modes */ +#define ALL_2_INPUT 0 /* config all digital channels to input */ +#define ALL_2_OUTPUT 1 /* config all digital channels to output */ + +/* 'private' structure for each subdevice */ +struct unioxx5_subd_priv { + int usp_iobase; + unsigned char usp_module_type[12]; /* 12 modules. each can be 70L or 73L */ + unsigned char usp_extra_data[12][4]; /* for saving previous written value for analog modules */ + unsigned char usp_prev_wr_val[3]; /* previous written value */ + unsigned char usp_prev_cn_val[3]; /* previous channel value */ +}; + +static int unioxx5_attach(struct comedi_device * dev, struct comedi_devconfig * it); +static int unioxx5_subdev_write(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data); +static int unioxx5_subdev_read(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data); +static int unioxx5_insn_config(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data); +static int unioxx5_detach(struct comedi_device * dev); +static int __unioxx5_subdev_init(struct comedi_subdevice * subdev, int subdev_iobase, + int minor); +static int __unioxx5_digital_write(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor); +static int __unioxx5_digital_read(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor); +//static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); +static int __unioxx5_analog_write(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor); +static int __unioxx5_analog_read(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor); +static int __unioxx5_define_chan_offset(int chan_num); +static void __unioxx5_analog_config(struct unioxx5_subd_priv * usp, int channel); + +static struct comedi_driver unioxx5_driver = { + driver_name:DRIVER_NAME, + module:THIS_MODULE, + attach:unioxx5_attach, + detach:unioxx5_detach +}; + +COMEDI_INITCLEANUP(unioxx5_driver); + +static int unioxx5_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + int iobase, i, n_subd; + int id, num, ba; + + iobase = it->options[0]; + + dev->board_name = DRIVER_NAME; + dev->iobase = iobase; + iobase += UNIOXX5_SUBDEV_BASE; + + /* defining number of subdevices and getting they types (it must be 'g01') */ + for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) { + id = inb(ba + 0xE); + num = inb(ba + 0xF); + + if (id != 'g' || num != 1) + continue; + + n_subd++; + } + + /* unioxx5 can has from two to four subdevices */ + if (n_subd < 2) { + printk(KERN_ERR + "your card must has at least 2 'g01' subdevices\n"); + return -1; + } + + if (alloc_subdevices(dev, n_subd) < 0) { + printk(KERN_ERR "out of memory\n"); + return -ENOMEM; + } + + /* initializing each of for same subdevices */ + for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) { + if (__unioxx5_subdev_init(&dev->subdevices[i], iobase, + dev->minor) < 0) + return -1; + } + + printk("attached\n"); + return 0; +} + +static int unioxx5_subdev_read(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data) +{ + struct unioxx5_subd_priv *usp = subdev->private; + int channel, type; + + channel = CR_CHAN(insn->chanspec); + type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */ + + if (type == MODULE_DIGITAL) { + if (!__unioxx5_digital_read(usp, data, channel, dev->minor)) + return -1; + } else { + if (!__unioxx5_analog_read(usp, data, channel, dev->minor)) + return -1; + } + + return 1; +} + +static int unioxx5_subdev_write(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data) +{ + struct unioxx5_subd_priv *usp = subdev->private; + int channel, type; + + channel = CR_CHAN(insn->chanspec); + type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */ + + if (type == MODULE_DIGITAL) { + if (!__unioxx5_digital_write(usp, data, channel, dev->minor)) + return -1; + } else { + if (!__unioxx5_analog_write(usp, data, channel, dev->minor)) + return -1; + } + + return 1; +} + +/* for digital modules only */ +static int unioxx5_insn_config(struct comedi_device * dev, struct comedi_subdevice * subdev, + struct comedi_insn * insn, unsigned int * data) +{ + int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type; + struct unioxx5_subd_priv *usp = subdev->private; + int mask = 1 << (channel & 0x07); + + type = usp->usp_module_type[channel / 2]; + + if (type != MODULE_DIGITAL) { + printk(KERN_ERR + "comedi%d: channel configuration accessible only for digital modules\n", + dev->minor); + return -1; + } + + if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { + printk(KERN_ERR + "comedi%d: undefined channel %d. channel range is 0 .. 23\n", + dev->minor, channel); + return -1; + } + + /* gets previously written value */ + flags = usp->usp_prev_cn_val[channel_offset - 1]; + + switch (*data) { + case COMEDI_INPUT: + flags &= ~mask; + break; + case COMEDI_OUTPUT: + flags |= mask; + break; + default: + printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor); + return -1; + } + + /* *\ + * sets channels buffer to 1(after this we are allowed to * + * change channel type on input or output) * + \* */ + outb(1, usp->usp_iobase + 0); + outb(flags, usp->usp_iobase + channel_offset); /* changes type of _one_ channel */ + outb(0, usp->usp_iobase + 0); /* sets channels bank to 0(allows directly input/output) */ + usp->usp_prev_cn_val[channel_offset - 1] = flags; /* saves written value */ + + return 0; +} + +static int unioxx5_detach(struct comedi_device * dev) +{ + int i; + struct comedi_subdevice *subdev; + struct unioxx5_subd_priv *usp; + + for (i = 0; i < dev->n_subdevices; i++) { + subdev = &dev->subdevices[i]; + usp = subdev->private; + release_region(usp->usp_iobase, UNIOXX5_SIZE); + kfree(subdev->private); + } + + return 0; +} + +/* initializing subdevice with given address */ +static int __unioxx5_subdev_init(struct comedi_subdevice * subdev, int subdev_iobase, + int minor) +{ + struct unioxx5_subd_priv *usp; + int i, to, ndef_flag = 0; + + if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) { + printk(KERN_ERR "comedi%d: I/O port conflict\n", minor); + return -EIO; + } + + if ((usp = (struct unioxx5_subd_priv *) kzalloc(sizeof(*usp), + GFP_KERNEL)) == NULL) { + printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor); + return -1; + } + + usp->usp_iobase = subdev_iobase; + printk("comedi%d: |", minor); + + /* defining modules types */ + for (i = 0; i < 12; i++) { + to = 10000; + + __unioxx5_analog_config(usp, i * 2); + outb(i + 1, subdev_iobase + 5); /* sends channel number to card */ + outb('H', subdev_iobase + 6); /* requests EEPROM world */ + while (!(inb(subdev_iobase + 0) & TxBE)) ; /* waits while writting will be allowed */ + outb(0, subdev_iobase + 6); + + /* waits while reading of two bytes will be allowed */ + while (!(inb(subdev_iobase + 0) & Rx2CA)) { + if (--to <= 0) { + ndef_flag = 1; + break; + } + } + + if (ndef_flag) { + usp->usp_module_type[i] = 0; + ndef_flag = 0; + } else + usp->usp_module_type[i] = inb(subdev_iobase + 6); + + printk(" [%d] 0x%02x |", i, usp->usp_module_type[i]); + comedi_udelay(1); + } + + printk("\n"); + + /* initial subdevice for digital or analog i/o */ + subdev->type = COMEDI_SUBD_DIO; + subdev->private = usp; + subdev->subdev_flags = SDF_READABLE | SDF_WRITABLE; + subdev->n_chan = UNIOXX5_NUM_OF_CHANS; + subdev->maxdata = 0xFFF; + subdev->range_table = &range_digital; + subdev->insn_read = unioxx5_subdev_read; + subdev->insn_write = unioxx5_subdev_write; + subdev->insn_config = unioxx5_insn_config; /* for digital modules only!!! */ + + printk("subdevice configured\n"); + + return 0; +} + +static int __unioxx5_digital_write(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor) +{ + int channel_offset, val; + int mask = 1 << (channel & 0x07); + + if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { + printk(KERN_ERR + "comedi%d: undefined channel %d. channel range is 0 .. 23\n", + minor, channel); + return 0; + } + + val = usp->usp_prev_wr_val[channel_offset - 1]; /* getting previous written value */ + + if (*data) + val |= mask; + else + val &= ~mask; + + outb(val, usp->usp_iobase + channel_offset); + usp->usp_prev_wr_val[channel_offset - 1] = val; /* saving new written value */ + + return 1; +} + +/* function for digital reading */ +static int __unioxx5_digital_read(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor) +{ + int channel_offset, mask = 1 << (channel & 0x07); + + if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { + printk(KERN_ERR + "comedi%d: undefined channel %d. channel range is 0 .. 23\n", + minor, channel); + return 0; + } + + *data = inb(usp->usp_iobase + channel_offset); + *data &= mask; + + if (channel_offset > 1) + channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */ + + *data >>= channel; + return 1; +} + +#if 0 /* not used? */ +static void __unioxx5_digital_config(struct unioxx5_subd_priv * usp, int mode) +{ + int i, mask; + + mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00; + printk("COMEDI: mode = %d\n", mask); + + outb(1, usp->usp_iobase + 0); + + for (i = 0; i < 3; i++) + outb(mask, usp->usp_iobase + i); + + outb(0, usp->usp_iobase + 0); +} +#endif + +static int __unioxx5_analog_write(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor) +{ + int module, i; + + module = channel / 2; /* definig module number(0 .. 11) */ + i = (channel % 2) << 1; /* depends on type of channel (A or B) */ + + /* defining if given module can work on output */ + if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) { + printk(KERN_ERR + "comedi%d: module in position %d with id 0x%0x is for input only!\n", + minor, module, usp->usp_module_type[module]); + return 0; + } + + __unioxx5_analog_config(usp, channel); + /* saving minor byte */ + usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF); + /* saving major byte */ + usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8); + + //while(!((inb(usp->usp_iobase + 0)) & TxBE)); + outb(module + 1, usp->usp_iobase + 5); /* sending module number to card(1 .. 12) */ + outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */ + + /* sending for bytes to module(one byte per cycle iteration) */ + for (i = 0; i < 4; i++) { + while (!((inb(usp->usp_iobase + 0)) & TxBE)) ; /* waits while writting will be allowed */ + outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6); + } + + return 1; +} + +static int __unioxx5_analog_read(struct unioxx5_subd_priv * usp, unsigned int * data, + int channel, int minor) +{ + int module_no, read_ch; + char control; + + module_no = channel / 2; + read_ch = channel % 2; /* depend on type of channel (A or B) */ + + /* defining if given module can work on input */ + if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) { + printk(KERN_ERR + "comedi%d: module in position %d with id 0x%02x is for output only", + minor, module_no, usp->usp_module_type[module_no]); + return 0; + } + + __unioxx5_analog_config(usp, channel); + outb(module_no + 1, usp->usp_iobase + 5); /* sends module number to card(1 .. 12) */ + outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */ + control = inb(usp->usp_iobase); /* get control register byte */ + + /* waits while reading four bytes will be allowed */ + while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA)) ; + + /* if four bytes readding error occurs - return 0(false) */ + if ((control & Rx4CA_ERR_MASK)) { + printk("COMEDI: 4 bytes error\n"); + return 0; + } + + if (read_ch) + *data = inw(usp->usp_iobase + 6); /* channel B */ + else + *data = inw(usp->usp_iobase + 4); /* channel A */ + + return 1; +} + +/* configure channels for analog i/o (even to output, odd to input) */ +static void __unioxx5_analog_config(struct unioxx5_subd_priv * usp, int channel) +{ + int chan_a, chan_b, conf, channel_offset; + + channel_offset = __unioxx5_define_chan_offset(channel); + conf = usp->usp_prev_cn_val[channel_offset - 1]; + chan_a = chan_b = 1; + + /* setting channel A and channel B mask */ + if (channel % 2 == 0) { + chan_a <<= channel & 0x07; + chan_b <<= (channel + 1) & 0x07; + } else { + chan_a <<= (channel - 1) & 0x07; + chan_b <<= channel & 0x07; + } + + conf |= chan_a; /* even channel ot output */ + conf &= ~chan_b; /* odd channel to input */ + + outb(1, usp->usp_iobase + 0); + outb(conf, usp->usp_iobase + channel_offset); + outb(0, usp->usp_iobase + 0); + + usp->usp_prev_cn_val[channel_offset - 1] = conf; +} + +/* *\ + * this function defines if the given channel number * + * enters in default numeric interspace(from 0 to 23) * + * and it returns address offset for usage needed * + * channel. * +\* */ + +static int __unioxx5_define_chan_offset(int chan_num) +{ + + if (chan_num < 0 || chan_num > 23) + return -1; + + return (chan_num >> 3) + 1; +} |