diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/comedi_test.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/comedi_test.c | 373 |
1 files changed, 166 insertions, 207 deletions
diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c index a804742b8022..873e37450bba 100644 --- a/drivers/staging/comedi/drivers/comedi_test.c +++ b/drivers/staging/comedi/drivers/comedi_test.c @@ -67,15 +67,6 @@ struct waveform_board { #define N_CHANS 8 -static const struct waveform_board waveform_boards[] = { - { - .name = "comedi_test", - .ai_chans = N_CHANS, - .ai_bits = 16, - .have_dio = 0, - }, -}; - #define thisboard ((const struct waveform_board *)dev->board_ptr) /* Data unique to this driver */ @@ -94,54 +85,6 @@ struct waveform_private { }; #define devpriv ((struct waveform_private *)dev->private) -static int waveform_attach(struct comedi_device *dev, - struct comedi_devconfig *it); -static int waveform_detach(struct comedi_device *dev); -static struct comedi_driver driver_waveform = { - .driver_name = "comedi_test", - .module = THIS_MODULE, - .attach = waveform_attach, - .detach = waveform_detach, - .board_name = &waveform_boards[0].name, - .offset = sizeof(struct waveform_board), - .num_names = ARRAY_SIZE(waveform_boards), -}; - -static int __init driver_waveform_init_module(void) -{ - return comedi_driver_register(&driver_waveform); -} - -static void __exit driver_waveform_cleanup_module(void) -{ - comedi_driver_unregister(&driver_waveform); -} - -module_init(driver_waveform_init_module); -module_exit(driver_waveform_cleanup_module); - -static int waveform_ai_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_cmd *cmd); -static int waveform_ai_cmd(struct comedi_device *dev, - struct comedi_subdevice *s); -static int waveform_ai_cancel(struct comedi_device *dev, - struct comedi_subdevice *s); -static int waveform_ai_insn_read(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data); -static int waveform_ao_insn_write(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data); -static short fake_sawtooth(struct comedi_device *dev, unsigned int range, - unsigned long current_time); -static short fake_squarewave(struct comedi_device *dev, unsigned int range, - unsigned long current_time); -static short fake_flatline(struct comedi_device *dev, unsigned int range, - unsigned long current_time); -static short fake_waveform(struct comedi_device *dev, unsigned int channel, - unsigned int range, unsigned long current_time); - /* 1000 nanosec in a microsec */ static const int nano_per_micro = 1000; @@ -154,6 +97,78 @@ static const struct comedi_lrange waveform_ai_ranges = { } }; +static short fake_sawtooth(struct comedi_device *dev, unsigned int range_index, + unsigned long current_time) +{ + struct comedi_subdevice *s = dev->read_subdev; + unsigned int offset = s->maxdata / 2; + u64 value; + const struct comedi_krange *krange = + &s->range_table->range[range_index]; + u64 binary_amplitude; + + binary_amplitude = s->maxdata; + binary_amplitude *= devpriv->uvolt_amplitude; + do_div(binary_amplitude, krange->max - krange->min); + + current_time %= devpriv->usec_period; + value = current_time; + value *= binary_amplitude * 2; + do_div(value, devpriv->usec_period); + value -= binary_amplitude; /* get rid of sawtooth's dc offset */ + + return offset + value; +} + +static short fake_squarewave(struct comedi_device *dev, + unsigned int range_index, + unsigned long current_time) +{ + struct comedi_subdevice *s = dev->read_subdev; + unsigned int offset = s->maxdata / 2; + u64 value; + const struct comedi_krange *krange = + &s->range_table->range[range_index]; + current_time %= devpriv->usec_period; + + value = s->maxdata; + value *= devpriv->uvolt_amplitude; + do_div(value, krange->max - krange->min); + + if (current_time < devpriv->usec_period / 2) + value *= -1; + + return offset + value; +} + +static short fake_flatline(struct comedi_device *dev, unsigned int range_index, + unsigned long current_time) +{ + return dev->read_subdev->maxdata / 2; +} + +/* generates a different waveform depending on what channel is read */ +static short fake_waveform(struct comedi_device *dev, unsigned int channel, + unsigned int range, unsigned long current_time) +{ + enum { + SAWTOOTH_CHAN, + SQUARE_CHAN, + }; + switch (channel) { + case SAWTOOTH_CHAN: + return fake_sawtooth(dev, range, current_time); + break; + case SQUARE_CHAN: + return fake_squarewave(dev, range, current_time); + break; + default: + break; + } + + return fake_flatline(dev, range, current_time); +} + /* This is the background routine used to generate arbitrary data. It should run in the background; therefore it is scheduled by @@ -217,84 +232,6 @@ static void waveform_ai_interrupt(unsigned long arg) comedi_event(dev, dev->read_subdev); } -static int waveform_attach(struct comedi_device *dev, - struct comedi_devconfig *it) -{ - struct comedi_subdevice *s; - int amplitude = it->options[0]; - int period = it->options[1]; - int i; - - dev->board_name = thisboard->name; - - if (alloc_private(dev, sizeof(struct waveform_private)) < 0) - return -ENOMEM; - - /* set default amplitude and period */ - if (amplitude <= 0) - amplitude = 1000000; /* 1 volt */ - if (period <= 0) - period = 100000; /* 0.1 sec */ - - devpriv->uvolt_amplitude = amplitude; - devpriv->usec_period = period; - - dev->n_subdevices = 2; - if (alloc_subdevices(dev, dev->n_subdevices) < 0) - return -ENOMEM; - - s = dev->subdevices + 0; - dev->read_subdev = s; - /* analog input subdevice */ - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; - s->n_chan = thisboard->ai_chans; - s->maxdata = (1 << thisboard->ai_bits) - 1; - s->range_table = &waveform_ai_ranges; - s->len_chanlist = s->n_chan * 2; - s->insn_read = waveform_ai_insn_read; - s->do_cmd = waveform_ai_cmd; - s->do_cmdtest = waveform_ai_cmdtest; - s->cancel = waveform_ai_cancel; - - s = dev->subdevices + 1; - dev->write_subdev = s; - /* analog output subdevice (loopback) */ - s->type = COMEDI_SUBD_AO; - s->subdev_flags = SDF_WRITEABLE | SDF_GROUND; - s->n_chan = thisboard->ai_chans; - s->maxdata = (1 << thisboard->ai_bits) - 1; - s->range_table = &waveform_ai_ranges; - s->len_chanlist = s->n_chan * 2; - s->insn_write = waveform_ao_insn_write; - s->do_cmd = NULL; - s->do_cmdtest = NULL; - s->cancel = NULL; - - /* Our default loopback value is just a 0V flatline */ - for (i = 0; i < s->n_chan; i++) - devpriv->ao_loopbacks[i] = s->maxdata / 2; - - init_timer(&(devpriv->timer)); - devpriv->timer.function = waveform_ai_interrupt; - devpriv->timer.data = (unsigned long)dev; - - printk(KERN_INFO "comedi%d: comedi_test: " - "%i microvolt, %li microsecond waveform attached\n", dev->minor, - devpriv->uvolt_amplitude, devpriv->usec_period); - return 1; -} - -static int waveform_detach(struct comedi_device *dev) -{ - printk("comedi%d: comedi_test: remove\n", dev->minor); - - if (dev->private) - waveform_ai_cancel(dev, dev->read_subdev); - - return 0; -} - static int waveform_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) @@ -465,78 +402,6 @@ static int waveform_ai_cancel(struct comedi_device *dev, return 0; } -static short fake_sawtooth(struct comedi_device *dev, unsigned int range_index, - unsigned long current_time) -{ - struct comedi_subdevice *s = dev->read_subdev; - unsigned int offset = s->maxdata / 2; - u64 value; - const struct comedi_krange *krange = - &s->range_table->range[range_index]; - u64 binary_amplitude; - - binary_amplitude = s->maxdata; - binary_amplitude *= devpriv->uvolt_amplitude; - do_div(binary_amplitude, krange->max - krange->min); - - current_time %= devpriv->usec_period; - value = current_time; - value *= binary_amplitude * 2; - do_div(value, devpriv->usec_period); - value -= binary_amplitude; /* get rid of sawtooth's dc offset */ - - return offset + value; -} - -static short fake_squarewave(struct comedi_device *dev, - unsigned int range_index, - unsigned long current_time) -{ - struct comedi_subdevice *s = dev->read_subdev; - unsigned int offset = s->maxdata / 2; - u64 value; - const struct comedi_krange *krange = - &s->range_table->range[range_index]; - current_time %= devpriv->usec_period; - - value = s->maxdata; - value *= devpriv->uvolt_amplitude; - do_div(value, krange->max - krange->min); - - if (current_time < devpriv->usec_period / 2) - value *= -1; - - return offset + value; -} - -static short fake_flatline(struct comedi_device *dev, unsigned int range_index, - unsigned long current_time) -{ - return dev->read_subdev->maxdata / 2; -} - -/* generates a different waveform depending on what channel is read */ -static short fake_waveform(struct comedi_device *dev, unsigned int channel, - unsigned int range, unsigned long current_time) -{ - enum { - SAWTOOTH_CHAN, - SQUARE_CHAN, - }; - switch (channel) { - case SAWTOOTH_CHAN: - return fake_sawtooth(dev, range, current_time); - break; - case SQUARE_CHAN: - return fake_squarewave(dev, range, current_time); - break; - default: - break; - } - - return fake_flatline(dev, range, current_time); -} - static int waveform_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) @@ -561,6 +426,100 @@ static int waveform_ao_insn_write(struct comedi_device *dev, return insn->n; } +static int waveform_attach(struct comedi_device *dev, + struct comedi_devconfig *it) +{ + struct comedi_subdevice *s; + int amplitude = it->options[0]; + int period = it->options[1]; + int i; + + dev->board_name = thisboard->name; + + if (alloc_private(dev, sizeof(struct waveform_private)) < 0) + return -ENOMEM; + + /* set default amplitude and period */ + if (amplitude <= 0) + amplitude = 1000000; /* 1 volt */ + if (period <= 0) + period = 100000; /* 0.1 sec */ + + devpriv->uvolt_amplitude = amplitude; + devpriv->usec_period = period; + + dev->n_subdevices = 2; + if (alloc_subdevices(dev, dev->n_subdevices) < 0) + return -ENOMEM; + + s = dev->subdevices + 0; + dev->read_subdev = s; + /* analog input subdevice */ + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; + s->n_chan = thisboard->ai_chans; + s->maxdata = (1 << thisboard->ai_bits) - 1; + s->range_table = &waveform_ai_ranges; + s->len_chanlist = s->n_chan * 2; + s->insn_read = waveform_ai_insn_read; + s->do_cmd = waveform_ai_cmd; + s->do_cmdtest = waveform_ai_cmdtest; + s->cancel = waveform_ai_cancel; + + s = dev->subdevices + 1; + dev->write_subdev = s; + /* analog output subdevice (loopback) */ + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITEABLE | SDF_GROUND; + s->n_chan = thisboard->ai_chans; + s->maxdata = (1 << thisboard->ai_bits) - 1; + s->range_table = &waveform_ai_ranges; + s->len_chanlist = s->n_chan * 2; + s->insn_write = waveform_ao_insn_write; + s->do_cmd = NULL; + s->do_cmdtest = NULL; + s->cancel = NULL; + + /* Our default loopback value is just a 0V flatline */ + for (i = 0; i < s->n_chan; i++) + devpriv->ao_loopbacks[i] = s->maxdata / 2; + + init_timer(&(devpriv->timer)); + devpriv->timer.function = waveform_ai_interrupt; + devpriv->timer.data = (unsigned long)dev; + + printk(KERN_INFO "comedi%d: comedi_test: " + "%i microvolt, %li microsecond waveform attached\n", dev->minor, + devpriv->uvolt_amplitude, devpriv->usec_period); + return 1; +} + +static void waveform_detach(struct comedi_device *dev) +{ + if (dev->private) + waveform_ai_cancel(dev, dev->read_subdev); +} + +static const struct waveform_board waveform_boards[] = { + { + .name = "comedi_test", + .ai_chans = N_CHANS, + .ai_bits = 16, + .have_dio = 0, + }, +}; + +static struct comedi_driver waveform_driver = { + .driver_name = "comedi_test", + .module = THIS_MODULE, + .attach = waveform_attach, + .detach = waveform_detach, + .board_name = &waveform_boards[0].name, + .offset = sizeof(struct waveform_board), + .num_names = ARRAY_SIZE(waveform_boards), +}; +module_comedi_driver(waveform_driver); + MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL"); |