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path: root/drivers/staging/comedi/drivers/serial2002.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/serial2002.c')
-rw-r--r--drivers/staging/comedi/drivers/serial2002.c798
1 files changed, 798 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/serial2002.c b/drivers/staging/comedi/drivers/serial2002.c
new file mode 100644
index 000000000..304ebff11
--- /dev/null
+++ b/drivers/staging/comedi/drivers/serial2002.c
@@ -0,0 +1,798 @@
+/*
+ comedi/drivers/serial2002.c
+ Skeleton code for a Comedi driver
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 2002 Anders Blomdell <anders.blomdell@control.lth.se>
+
+ 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.
+*/
+
+/*
+Driver: serial2002
+Description: Driver for serial connected hardware
+Devices:
+Author: Anders Blomdell
+Updated: Fri, 7 Jun 2002 12:56:45 -0700
+Status: in development
+
+*/
+
+#include <linux/module.h>
+#include "../comedidev.h"
+
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <linux/termios.h>
+#include <asm/ioctls.h>
+#include <linux/serial.h>
+#include <linux/poll.h>
+
+struct serial2002_range_table_t {
+ /* HACK... */
+ int length;
+ struct comedi_krange range;
+};
+
+struct serial2002_private {
+ int port; /* /dev/ttyS<port> */
+ int speed; /* baudrate */
+ struct file *tty;
+ unsigned int ao_readback[32];
+ unsigned char digital_in_mapping[32];
+ unsigned char digital_out_mapping[32];
+ unsigned char analog_in_mapping[32];
+ unsigned char analog_out_mapping[32];
+ unsigned char encoder_in_mapping[32];
+ struct serial2002_range_table_t in_range[32], out_range[32];
+};
+
+struct serial_data {
+ enum { is_invalid, is_digital, is_channel } kind;
+ int index;
+ unsigned long value;
+};
+
+/*
+ * The configuration serial_data.value read from the device is
+ * a bitmask that defines specific options of a channel:
+ *
+ * 4:0 - the channel to configure
+ * 7:5 - the kind of channel
+ * 9:8 - the command used to configure the channel
+ *
+ * The remaining bits vary in use depending on the command:
+ *
+ * BITS 15:10 - the channel bits (maxdata)
+ * MIN/MAX 12:10 - the units multiplier for the scale
+ * 13 - the sign of the scale
+ * 33:14 - the base value for the range
+ */
+#define S2002_CFG_CHAN(x) ((x) & 0x1f)
+#define S2002_CFG_KIND(x) (((x) >> 5) & 0x7)
+#define S2002_CFG_KIND_INVALID 0
+#define S2002_CFG_KIND_DIGITAL_IN 1
+#define S2002_CFG_KIND_DIGITAL_OUT 2
+#define S2002_CFG_KIND_ANALOG_IN 3
+#define S2002_CFG_KIND_ANALOG_OUT 4
+#define S2002_CFG_KIND_ENCODER_IN 5
+#define S2002_CFG_CMD(x) (((x) >> 8) & 0x3)
+#define S2002_CFG_CMD_BITS 0
+#define S2002_CFG_CMD_MIN 1
+#define S2002_CFG_CMD_MAX 2
+#define S2002_CFG_BITS(x) (((x) >> 10) & 0x3f)
+#define S2002_CFG_UNITS(x) (((x) >> 10) & 0x7)
+#define S2002_CFG_SIGN(x) (((x) >> 13) & 0x1)
+#define S2002_CFG_BASE(x) (((x) >> 14) & 0xfffff)
+
+static long serial2002_tty_ioctl(struct file *f, unsigned op,
+ unsigned long param)
+{
+ if (f->f_op->unlocked_ioctl)
+ return f->f_op->unlocked_ioctl(f, op, param);
+
+ return -ENOSYS;
+}
+
+static int serial2002_tty_write(struct file *f, unsigned char *buf, int count)
+{
+ const char __user *p = (__force const char __user *)buf;
+ int result;
+ loff_t offset = 0;
+ mm_segment_t oldfs;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ result = __vfs_write(f, p, count, &offset);
+ set_fs(oldfs);
+ return result;
+}
+
+static void serial2002_tty_read_poll_wait(struct file *f, int timeout)
+{
+ struct poll_wqueues table;
+ struct timeval start, now;
+
+ do_gettimeofday(&start);
+ poll_initwait(&table);
+ while (1) {
+ long elapsed;
+ int mask;
+
+ mask = f->f_op->poll(f, &table.pt);
+ if (mask & (POLLRDNORM | POLLRDBAND | POLLIN |
+ POLLHUP | POLLERR)) {
+ break;
+ }
+ do_gettimeofday(&now);
+ elapsed = 1000000 * (now.tv_sec - start.tv_sec) +
+ now.tv_usec - start.tv_usec;
+ if (elapsed > timeout)
+ break;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(((timeout - elapsed) * HZ) / 10000);
+ }
+ poll_freewait(&table);
+}
+
+static int serial2002_tty_read(struct file *f, int timeout)
+{
+ unsigned char ch;
+ int result;
+
+ result = -1;
+ if (!IS_ERR(f)) {
+ mm_segment_t oldfs;
+ char __user *p = (__force char __user *)&ch;
+ loff_t offset = 0;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ if (f->f_op->poll) {
+ serial2002_tty_read_poll_wait(f, timeout);
+
+ if (__vfs_read(f, p, 1, &offset) == 1)
+ result = ch;
+ } else {
+ /* Device does not support poll, busy wait */
+ int retries = 0;
+
+ while (1) {
+ retries++;
+ if (retries >= timeout)
+ break;
+
+ if (__vfs_read(f, p, 1, &offset) == 1) {
+ result = ch;
+ break;
+ }
+ udelay(100);
+ }
+ }
+ set_fs(oldfs);
+ }
+ return result;
+}
+
+static void serial2002_tty_setspeed(struct file *f, int speed)
+{
+ struct termios termios;
+ struct serial_struct serial;
+ mm_segment_t oldfs;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+
+ /* Set speed */
+ serial2002_tty_ioctl(f, TCGETS, (unsigned long)&termios);
+ termios.c_iflag = 0;
+ termios.c_oflag = 0;
+ termios.c_lflag = 0;
+ termios.c_cflag = CLOCAL | CS8 | CREAD;
+ termios.c_cc[VMIN] = 0;
+ termios.c_cc[VTIME] = 0;
+ switch (speed) {
+ case 2400:
+ termios.c_cflag |= B2400;
+ break;
+ case 4800:
+ termios.c_cflag |= B4800;
+ break;
+ case 9600:
+ termios.c_cflag |= B9600;
+ break;
+ case 19200:
+ termios.c_cflag |= B19200;
+ break;
+ case 38400:
+ termios.c_cflag |= B38400;
+ break;
+ case 57600:
+ termios.c_cflag |= B57600;
+ break;
+ case 115200:
+ termios.c_cflag |= B115200;
+ break;
+ default:
+ termios.c_cflag |= B9600;
+ break;
+ }
+ serial2002_tty_ioctl(f, TCSETS, (unsigned long)&termios);
+
+ /* Set low latency */
+ serial2002_tty_ioctl(f, TIOCGSERIAL, (unsigned long)&serial);
+ serial.flags |= ASYNC_LOW_LATENCY;
+ serial2002_tty_ioctl(f, TIOCSSERIAL, (unsigned long)&serial);
+
+ set_fs(oldfs);
+}
+
+static void serial2002_poll_digital(struct file *f, int channel)
+{
+ char cmd;
+
+ cmd = 0x40 | (channel & 0x1f);
+ serial2002_tty_write(f, &cmd, 1);
+}
+
+static void serial2002_poll_channel(struct file *f, int channel)
+{
+ char cmd;
+
+ cmd = 0x60 | (channel & 0x1f);
+ serial2002_tty_write(f, &cmd, 1);
+}
+
+static struct serial_data serial2002_read(struct file *f, int timeout)
+{
+ struct serial_data result;
+ int length;
+
+ result.kind = is_invalid;
+ result.index = 0;
+ result.value = 0;
+ length = 0;
+ while (1) {
+ int data = serial2002_tty_read(f, timeout);
+
+ length++;
+ if (data < 0) {
+ break;
+ } else if (data & 0x80) {
+ result.value = (result.value << 7) | (data & 0x7f);
+ } else {
+ if (length == 1) {
+ switch ((data >> 5) & 0x03) {
+ case 0:
+ result.value = 0;
+ result.kind = is_digital;
+ break;
+ case 1:
+ result.value = 1;
+ result.kind = is_digital;
+ break;
+ }
+ } else {
+ result.value =
+ (result.value << 2) | ((data & 0x60) >> 5);
+ result.kind = is_channel;
+ }
+ result.index = data & 0x1f;
+ break;
+ }
+ }
+ return result;
+}
+
+static void serial2002_write(struct file *f, struct serial_data data)
+{
+ if (data.kind == is_digital) {
+ unsigned char ch =
+ ((data.value << 5) & 0x20) | (data.index & 0x1f);
+ serial2002_tty_write(f, &ch, 1);
+ } else {
+ unsigned char ch[6];
+ int i = 0;
+
+ if (data.value >= (1L << 30)) {
+ ch[i] = 0x80 | ((data.value >> 30) & 0x03);
+ i++;
+ }
+ if (data.value >= (1L << 23)) {
+ ch[i] = 0x80 | ((data.value >> 23) & 0x7f);
+ i++;
+ }
+ if (data.value >= (1L << 16)) {
+ ch[i] = 0x80 | ((data.value >> 16) & 0x7f);
+ i++;
+ }
+ if (data.value >= (1L << 9)) {
+ ch[i] = 0x80 | ((data.value >> 9) & 0x7f);
+ i++;
+ }
+ ch[i] = 0x80 | ((data.value >> 2) & 0x7f);
+ i++;
+ ch[i] = ((data.value << 5) & 0x60) | (data.index & 0x1f);
+ i++;
+ serial2002_tty_write(f, ch, i);
+ }
+}
+
+struct config_t {
+ short int kind;
+ short int bits;
+ int min;
+ int max;
+};
+
+static int serial2002_setup_subdevice(struct comedi_subdevice *s,
+ struct config_t *cfg,
+ struct serial2002_range_table_t *range,
+ unsigned char *mapping,
+ int kind)
+{
+ const struct comedi_lrange **range_table_list = NULL;
+ unsigned int *maxdata_list;
+ int j, chan;
+
+ for (chan = 0, j = 0; j < 32; j++) {
+ if (cfg[j].kind == kind)
+ chan++;
+ }
+ s->n_chan = chan;
+ s->maxdata = 0;
+ kfree(s->maxdata_list);
+ maxdata_list = kmalloc_array(s->n_chan, sizeof(unsigned int),
+ GFP_KERNEL);
+ if (!maxdata_list)
+ return -ENOMEM;
+ s->maxdata_list = maxdata_list;
+ kfree(s->range_table_list);
+ s->range_table = NULL;
+ s->range_table_list = NULL;
+ if (kind == 1 || kind == 2) {
+ s->range_table = &range_digital;
+ } else if (range) {
+ range_table_list = kmalloc_array(s->n_chan, sizeof(*range),
+ GFP_KERNEL);
+ if (!range_table_list)
+ return -ENOMEM;
+ s->range_table_list = range_table_list;
+ }
+ for (chan = 0, j = 0; j < 32; j++) {
+ if (cfg[j].kind == kind) {
+ if (mapping)
+ mapping[chan] = j;
+ if (range) {
+ range[j].length = 1;
+ range[j].range.min = cfg[j].min;
+ range[j].range.max = cfg[j].max;
+ range_table_list[chan] =
+ (const struct comedi_lrange *)&range[j];
+ }
+ maxdata_list[chan] = ((long long)1 << cfg[j].bits) - 1;
+ chan++;
+ }
+ }
+ return 0;
+}
+
+static int serial2002_setup_subdevs(struct comedi_device *dev)
+{
+ struct serial2002_private *devpriv = dev->private;
+ struct config_t *di_cfg;
+ struct config_t *do_cfg;
+ struct config_t *ai_cfg;
+ struct config_t *ao_cfg;
+ struct config_t *cfg;
+ struct comedi_subdevice *s;
+ int result = 0;
+ int i;
+
+ /* Allocate the temporary structs to hold the configuration data */
+ di_cfg = kcalloc(32, sizeof(*cfg), GFP_KERNEL);
+ do_cfg = kcalloc(32, sizeof(*cfg), GFP_KERNEL);
+ ai_cfg = kcalloc(32, sizeof(*cfg), GFP_KERNEL);
+ ao_cfg = kcalloc(32, sizeof(*cfg), GFP_KERNEL);
+ if (!di_cfg || !do_cfg || !ai_cfg || !ao_cfg) {
+ result = -ENOMEM;
+ goto err_alloc_configs;
+ }
+
+ /* Read the configuration from the connected device */
+ serial2002_tty_setspeed(devpriv->tty, devpriv->speed);
+ serial2002_poll_channel(devpriv->tty, 31);
+ while (1) {
+ struct serial_data data = serial2002_read(devpriv->tty, 1000);
+ int kind = S2002_CFG_KIND(data.value);
+ int channel = S2002_CFG_CHAN(data.value);
+ int range = S2002_CFG_BASE(data.value);
+ int cmd = S2002_CFG_CMD(data.value);
+
+ if (data.kind != is_channel || data.index != 31 ||
+ kind == S2002_CFG_KIND_INVALID)
+ break;
+
+ switch (kind) {
+ case S2002_CFG_KIND_DIGITAL_IN:
+ cfg = di_cfg;
+ break;
+ case S2002_CFG_KIND_DIGITAL_OUT:
+ cfg = do_cfg;
+ break;
+ case S2002_CFG_KIND_ANALOG_IN:
+ cfg = ai_cfg;
+ break;
+ case S2002_CFG_KIND_ANALOG_OUT:
+ cfg = ao_cfg;
+ break;
+ case S2002_CFG_KIND_ENCODER_IN:
+ cfg = ai_cfg;
+ break;
+ default:
+ cfg = NULL;
+ break;
+ }
+ if (!cfg)
+ continue; /* unknown kind, skip it */
+
+ cfg[channel].kind = kind;
+
+ switch (cmd) {
+ case S2002_CFG_CMD_BITS:
+ cfg[channel].bits = S2002_CFG_BITS(data.value);
+ break;
+ case S2002_CFG_CMD_MIN:
+ case S2002_CFG_CMD_MAX:
+ switch (S2002_CFG_UNITS(data.value)) {
+ case 0:
+ range *= 1000000;
+ break;
+ case 1:
+ range *= 1000;
+ break;
+ case 2:
+ range *= 1;
+ break;
+ }
+ if (S2002_CFG_SIGN(data.value))
+ range = -range;
+ if (cmd == S2002_CFG_CMD_MIN)
+ cfg[channel].min = range;
+ else
+ cfg[channel].max = range;
+ break;
+ }
+ }
+
+ /* Fill in subdevice data */
+ for (i = 0; i <= 4; i++) {
+ unsigned char *mapping = NULL;
+ struct serial2002_range_table_t *range = NULL;
+ int kind = 0;
+
+ s = &dev->subdevices[i];
+
+ switch (i) {
+ case 0:
+ cfg = di_cfg;
+ mapping = devpriv->digital_in_mapping;
+ kind = S2002_CFG_KIND_DIGITAL_IN;
+ break;
+ case 1:
+ cfg = do_cfg;
+ mapping = devpriv->digital_out_mapping;
+ kind = S2002_CFG_KIND_DIGITAL_OUT;
+ break;
+ case 2:
+ cfg = ai_cfg;
+ mapping = devpriv->analog_in_mapping;
+ range = devpriv->in_range;
+ kind = S2002_CFG_KIND_ANALOG_IN;
+ break;
+ case 3:
+ cfg = ao_cfg;
+ mapping = devpriv->analog_out_mapping;
+ range = devpriv->out_range;
+ kind = S2002_CFG_KIND_ANALOG_OUT;
+ break;
+ case 4:
+ cfg = ai_cfg;
+ mapping = devpriv->encoder_in_mapping;
+ range = devpriv->in_range;
+ kind = S2002_CFG_KIND_ENCODER_IN;
+ break;
+ }
+
+ if (serial2002_setup_subdevice(s, cfg, range, mapping, kind))
+ break; /* err handled below */
+ }
+ if (i <= 4) {
+ /*
+ * Failed to allocate maxdata_list or range_table_list
+ * for a subdevice that needed it.
+ */
+ result = -ENOMEM;
+ for (i = 0; i <= 4; i++) {
+ s = &dev->subdevices[i];
+ kfree(s->maxdata_list);
+ s->maxdata_list = NULL;
+ kfree(s->range_table_list);
+ s->range_table_list = NULL;
+ }
+ }
+
+err_alloc_configs:
+ kfree(di_cfg);
+ kfree(do_cfg);
+ kfree(ai_cfg);
+ kfree(ao_cfg);
+
+ if (result) {
+ if (devpriv->tty) {
+ filp_close(devpriv->tty, NULL);
+ devpriv->tty = NULL;
+ }
+ }
+
+ return result;
+}
+
+static int serial2002_open(struct comedi_device *dev)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int result;
+ char port[20];
+
+ sprintf(port, "/dev/ttyS%d", devpriv->port);
+ devpriv->tty = filp_open(port, O_RDWR, 0);
+ if (IS_ERR(devpriv->tty)) {
+ result = (int)PTR_ERR(devpriv->tty);
+ dev_err(dev->class_dev, "file open error = %d\n", result);
+ } else {
+ result = serial2002_setup_subdevs(dev);
+ }
+ return result;
+}
+
+static void serial2002_close(struct comedi_device *dev)
+{
+ struct serial2002_private *devpriv = dev->private;
+
+ if (!IS_ERR(devpriv->tty) && devpriv->tty)
+ filp_close(devpriv->tty, NULL);
+}
+
+static int serial2002_di_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan;
+
+ chan = devpriv->digital_in_mapping[CR_CHAN(insn->chanspec)];
+ for (n = 0; n < insn->n; n++) {
+ struct serial_data read;
+
+ serial2002_poll_digital(devpriv->tty, chan);
+ while (1) {
+ read = serial2002_read(devpriv->tty, 1000);
+ if (read.kind != is_digital || read.index == chan)
+ break;
+ }
+ data[n] = read.value;
+ }
+ return n;
+}
+
+static int serial2002_do_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan;
+
+ chan = devpriv->digital_out_mapping[CR_CHAN(insn->chanspec)];
+ for (n = 0; n < insn->n; n++) {
+ struct serial_data write;
+
+ write.kind = is_digital;
+ write.index = chan;
+ write.value = data[n];
+ serial2002_write(devpriv->tty, write);
+ }
+ return n;
+}
+
+static int serial2002_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan;
+
+ chan = devpriv->analog_in_mapping[CR_CHAN(insn->chanspec)];
+ for (n = 0; n < insn->n; n++) {
+ struct serial_data read;
+
+ serial2002_poll_channel(devpriv->tty, chan);
+ while (1) {
+ read = serial2002_read(devpriv->tty, 1000);
+ if (read.kind != is_channel || read.index == chan)
+ break;
+ }
+ data[n] = read.value;
+ }
+ return n;
+}
+
+static int serial2002_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan;
+
+ chan = devpriv->analog_out_mapping[CR_CHAN(insn->chanspec)];
+ for (n = 0; n < insn->n; n++) {
+ struct serial_data write;
+
+ write.kind = is_channel;
+ write.index = chan;
+ write.value = data[n];
+ serial2002_write(devpriv->tty, write);
+ devpriv->ao_readback[chan] = data[n];
+ }
+ return n;
+}
+
+static int serial2002_ao_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (n = 0; n < insn->n; n++)
+ data[n] = devpriv->ao_readback[chan];
+
+ return n;
+}
+
+static int serial2002_encoder_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct serial2002_private *devpriv = dev->private;
+ int n;
+ int chan;
+
+ chan = devpriv->encoder_in_mapping[CR_CHAN(insn->chanspec)];
+ for (n = 0; n < insn->n; n++) {
+ struct serial_data read;
+
+ serial2002_poll_channel(devpriv->tty, chan);
+ while (1) {
+ read = serial2002_read(devpriv->tty, 1000);
+ if (read.kind != is_channel || read.index == chan)
+ break;
+ }
+ data[n] = read.value;
+ }
+ return n;
+}
+
+static int serial2002_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ struct serial2002_private *devpriv;
+ struct comedi_subdevice *s;
+ int ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ devpriv->port = it->options[0];
+ devpriv->speed = it->options[1];
+
+ ret = comedi_alloc_subdevices(dev, 5);
+ if (ret)
+ return ret;
+
+ /* digital input subdevice */
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 0;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_read = serial2002_di_insn_read;
+
+ /* digital output subdevice */
+ s = &dev->subdevices[1];
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 0;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_write = serial2002_do_insn_write;
+
+ /* analog input subdevice */
+ s = &dev->subdevices[2];
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 0;
+ s->maxdata = 1;
+ s->range_table = NULL;
+ s->insn_read = serial2002_ai_insn_read;
+
+ /* analog output subdevice */
+ s = &dev->subdevices[3];
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 0;
+ s->maxdata = 1;
+ s->range_table = NULL;
+ s->insn_write = serial2002_ao_insn_write;
+ s->insn_read = serial2002_ao_insn_read;
+
+ /* encoder input subdevice */
+ s = &dev->subdevices[4];
+ s->type = COMEDI_SUBD_COUNTER;
+ s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
+ s->n_chan = 0;
+ s->maxdata = 1;
+ s->range_table = NULL;
+ s->insn_read = serial2002_encoder_insn_read;
+
+ dev->open = serial2002_open;
+ dev->close = serial2002_close;
+
+ return 0;
+}
+
+static void serial2002_detach(struct comedi_device *dev)
+{
+ struct comedi_subdevice *s;
+ int i;
+
+ for (i = 0; i < dev->n_subdevices; i++) {
+ s = &dev->subdevices[i];
+ kfree(s->maxdata_list);
+ kfree(s->range_table_list);
+ }
+}
+
+static struct comedi_driver serial2002_driver = {
+ .driver_name = "serial2002",
+ .module = THIS_MODULE,
+ .attach = serial2002_attach,
+ .detach = serial2002_detach,
+};
+module_comedi_driver(serial2002_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-02 14:12:43 +0000