diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/ni_at_a2150.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_at_a2150.c | 360 |
1 files changed, 168 insertions, 192 deletions
diff --git a/drivers/staging/comedi/drivers/ni_at_a2150.c b/drivers/staging/comedi/drivers/ni_at_a2150.c index c25e44c1905e..ae896a094150 100644 --- a/drivers/staging/comedi/drivers/ni_at_a2150.c +++ b/drivers/staging/comedi/drivers/ni_at_a2150.c @@ -171,46 +171,13 @@ struct a2150_private { #define devpriv ((struct a2150_private *)dev->private) -static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it); -static int a2150_detach(struct comedi_device *dev); static int a2150_cancel(struct comedi_device *dev, struct comedi_subdevice *s); -static struct comedi_driver driver_a2150 = { - .driver_name = "ni_at_a2150", - .module = THIS_MODULE, - .attach = a2150_attach, - .detach = a2150_detach, -}; - -static irqreturn_t a2150_interrupt(int irq, void *d); -static int a2150_ai_cmdtest(struct comedi_device *dev, - struct comedi_subdevice *s, struct comedi_cmd *cmd); -static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s); -static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data); static int a2150_get_timing(struct comedi_device *dev, unsigned int *period, int flags); -static int a2150_probe(struct comedi_device *dev); static int a2150_set_chanlist(struct comedi_device *dev, unsigned int start_channel, unsigned int num_channels); -/* - * A convenient macro that defines init_module() and cleanup_module(), - * as necessary. - */ -static int __init driver_a2150_init_module(void) -{ - return comedi_driver_register(&driver_a2150); -} - -static void __exit driver_a2150_cleanup_module(void) -{ - comedi_driver_unregister(&driver_a2150); -} - -module_init(driver_a2150_init_module); -module_exit(driver_a2150_cleanup_module); - #ifdef A2150_DEBUG static void ni_dump_regs(struct comedi_device *dev) @@ -331,161 +298,6 @@ static irqreturn_t a2150_interrupt(int irq, void *d) return IRQ_HANDLED; } -/* probes board type, returns offset */ -static int a2150_probe(struct comedi_device *dev) -{ - int status = inw(dev->iobase + STATUS_REG); - return ID_BITS(status); -} - -static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it) -{ - struct comedi_subdevice *s; - unsigned long iobase = it->options[0]; - unsigned int irq = it->options[1]; - unsigned int dma = it->options[2]; - static const int timeout = 2000; - int i; - - printk("comedi%d: %s: io 0x%lx", dev->minor, driver_a2150.driver_name, - iobase); - if (irq) { - printk(", irq %u", irq); - } else { - printk(", no irq"); - } - if (dma) { - printk(", dma %u", dma); - } else { - printk(", no dma"); - } - printk("\n"); - - /* allocate and initialize dev->private */ - if (alloc_private(dev, sizeof(struct a2150_private)) < 0) - return -ENOMEM; - - if (iobase == 0) { - printk(" io base address required\n"); - return -EINVAL; - } - - /* check if io addresses are available */ - if (!request_region(iobase, A2150_SIZE, driver_a2150.driver_name)) { - printk(" I/O port conflict\n"); - return -EIO; - } - dev->iobase = iobase; - - /* grab our IRQ */ - if (irq) { - /* check that irq is supported */ - if (irq < 3 || irq == 8 || irq == 13 || irq > 15) { - printk(" invalid irq line %u\n", irq); - return -EINVAL; - } - if (request_irq(irq, a2150_interrupt, 0, - driver_a2150.driver_name, dev)) { - printk("unable to allocate irq %u\n", irq); - return -EINVAL; - } - devpriv->irq_dma_bits |= IRQ_LVL_BITS(irq); - dev->irq = irq; - } - /* initialize dma */ - if (dma) { - if (dma == 4 || dma > 7) { - printk(" invalid dma channel %u\n", dma); - return -EINVAL; - } - if (request_dma(dma, driver_a2150.driver_name)) { - printk(" failed to allocate dma channel %u\n", dma); - return -EINVAL; - } - devpriv->dma = dma; - devpriv->dma_buffer = - kmalloc(A2150_DMA_BUFFER_SIZE, GFP_KERNEL | GFP_DMA); - if (devpriv->dma_buffer == NULL) - return -ENOMEM; - - disable_dma(dma); - set_dma_mode(dma, DMA_MODE_READ); - - devpriv->irq_dma_bits |= DMA_CHAN_BITS(dma); - } - - dev->board_ptr = a2150_boards + a2150_probe(dev); - dev->board_name = thisboard->name; - - if (alloc_subdevices(dev, 1) < 0) - return -ENOMEM; - - /* analog input subdevice */ - s = dev->subdevices + 0; - dev->read_subdev = s; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_OTHER | SDF_CMD_READ; - s->n_chan = 4; - s->len_chanlist = 4; - s->maxdata = 0xffff; - s->range_table = &range_a2150; - s->do_cmd = a2150_ai_cmd; - s->do_cmdtest = a2150_ai_cmdtest; - s->insn_read = a2150_ai_rinsn; - s->cancel = a2150_cancel; - - /* need to do this for software counting of completed conversions, to - * prevent hardware count from stopping acquisition */ - outw(HW_COUNT_DISABLE, dev->iobase + I8253_MODE_REG); - - /* set card's irq and dma levels */ - outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); - - /* reset and sync adc clock circuitry */ - outw_p(DPD_BIT | APD_BIT, dev->iobase + CONFIG_REG); - outw_p(DPD_BIT, dev->iobase + CONFIG_REG); - /* initialize configuration register */ - devpriv->config_bits = 0; - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - /* wait until offset calibration is done, then enable analog inputs */ - for (i = 0; i < timeout; i++) { - if ((DCAL_BIT & inw(dev->iobase + STATUS_REG)) == 0) - break; - udelay(1000); - } - if (i == timeout) { - printk - (" timed out waiting for offset calibration to complete\n"); - return -ETIME; - } - devpriv->config_bits |= ENABLE0_BIT | ENABLE1_BIT; - outw(devpriv->config_bits, dev->iobase + CONFIG_REG); - - return 0; -}; - -static int a2150_detach(struct comedi_device *dev) -{ - printk("comedi%d: %s: remove\n", dev->minor, driver_a2150.driver_name); - - /* only free stuff if it has been allocated by _attach */ - if (dev->iobase) { - /* put board in power-down mode */ - outw(APD_BIT | DPD_BIT, dev->iobase + CONFIG_REG); - release_region(dev->iobase, A2150_SIZE); - } - - if (dev->irq) - free_irq(dev->irq, dev); - if (devpriv) { - if (devpriv->dma) - free_dma(devpriv->dma); - kfree(devpriv->dma_buffer); - } - - return 0; -}; - static int a2150_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { /* disable dma on card */ @@ -539,7 +351,10 @@ static int a2150_ai_cmdtest(struct comedi_device *dev, if (err) return 1; - /* step 2: make sure trigger sources are unique and mutually compatible */ + /* + * step 2: make sure trigger sources are unique and mutually + * compatible + */ if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT) err++; @@ -771,7 +586,10 @@ static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, /* start acquisition for soft trigger */ outw(0, dev->iobase + FIFO_START_REG); - /* there is a 35.6 sample delay for data to get through the antialias filter */ + /* + * there is a 35.6 sample delay for data to get through the + * antialias filter + */ for (n = 0; n < filter_delay; n++) { for (i = 0; i < timeout; i++) { if (inw(dev->iobase + STATUS_REG) & FNE_BIT) @@ -812,8 +630,10 @@ static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, return n; } -/* sets bits in devpriv->clock_bits to nearest approximation of requested period, - * adjusts requested period to actual timing. */ +/* + * sets bits in devpriv->clock_bits to nearest approximation of requested + * period, adjusts requested period to actual timing. + */ static int a2150_get_timing(struct comedi_device *dev, unsigned int *period, int flags) { @@ -920,6 +740,162 @@ static int a2150_set_chanlist(struct comedi_device *dev, return 0; } +/* probes board type, returns offset */ +static int a2150_probe(struct comedi_device *dev) +{ + int status = inw(dev->iobase + STATUS_REG); + return ID_BITS(status); +} + +static int a2150_attach(struct comedi_device *dev, struct comedi_devconfig *it) +{ + struct comedi_subdevice *s; + unsigned long iobase = it->options[0]; + unsigned int irq = it->options[1]; + unsigned int dma = it->options[2]; + static const int timeout = 2000; + int i; + + printk("comedi%d: %s: io 0x%lx", dev->minor, dev->driver->driver_name, + iobase); + if (irq) { + printk(", irq %u", irq); + } else { + printk(", no irq"); + } + if (dma) { + printk(", dma %u", dma); + } else { + printk(", no dma"); + } + printk("\n"); + + /* allocate and initialize dev->private */ + if (alloc_private(dev, sizeof(struct a2150_private)) < 0) + return -ENOMEM; + + if (iobase == 0) { + printk(" io base address required\n"); + return -EINVAL; + } + + /* check if io addresses are available */ + if (!request_region(iobase, A2150_SIZE, dev->driver->driver_name)) { + printk(" I/O port conflict\n"); + return -EIO; + } + dev->iobase = iobase; + + /* grab our IRQ */ + if (irq) { + /* check that irq is supported */ + if (irq < 3 || irq == 8 || irq == 13 || irq > 15) { + printk(" invalid irq line %u\n", irq); + return -EINVAL; + } + if (request_irq(irq, a2150_interrupt, 0, + dev->driver->driver_name, dev)) { + printk("unable to allocate irq %u\n", irq); + return -EINVAL; + } + devpriv->irq_dma_bits |= IRQ_LVL_BITS(irq); + dev->irq = irq; + } + /* initialize dma */ + if (dma) { + if (dma == 4 || dma > 7) { + printk(" invalid dma channel %u\n", dma); + return -EINVAL; + } + if (request_dma(dma, dev->driver->driver_name)) { + printk(" failed to allocate dma channel %u\n", dma); + return -EINVAL; + } + devpriv->dma = dma; + devpriv->dma_buffer = + kmalloc(A2150_DMA_BUFFER_SIZE, GFP_KERNEL | GFP_DMA); + if (devpriv->dma_buffer == NULL) + return -ENOMEM; + + disable_dma(dma); + set_dma_mode(dma, DMA_MODE_READ); + + devpriv->irq_dma_bits |= DMA_CHAN_BITS(dma); + } + + dev->board_ptr = a2150_boards + a2150_probe(dev); + dev->board_name = thisboard->name; + + if (alloc_subdevices(dev, 1) < 0) + return -ENOMEM; + + /* analog input subdevice */ + s = dev->subdevices + 0; + dev->read_subdev = s; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_OTHER | SDF_CMD_READ; + s->n_chan = 4; + s->len_chanlist = 4; + s->maxdata = 0xffff; + s->range_table = &range_a2150; + s->do_cmd = a2150_ai_cmd; + s->do_cmdtest = a2150_ai_cmdtest; + s->insn_read = a2150_ai_rinsn; + s->cancel = a2150_cancel; + + /* need to do this for software counting of completed conversions, to + * prevent hardware count from stopping acquisition */ + outw(HW_COUNT_DISABLE, dev->iobase + I8253_MODE_REG); + + /* set card's irq and dma levels */ + outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG); + + /* reset and sync adc clock circuitry */ + outw_p(DPD_BIT | APD_BIT, dev->iobase + CONFIG_REG); + outw_p(DPD_BIT, dev->iobase + CONFIG_REG); + /* initialize configuration register */ + devpriv->config_bits = 0; + outw(devpriv->config_bits, dev->iobase + CONFIG_REG); + /* wait until offset calibration is done, then enable analog inputs */ + for (i = 0; i < timeout; i++) { + if ((DCAL_BIT & inw(dev->iobase + STATUS_REG)) == 0) + break; + udelay(1000); + } + if (i == timeout) { + printk + (" timed out waiting for offset calibration to complete\n"); + return -ETIME; + } + devpriv->config_bits |= ENABLE0_BIT | ENABLE1_BIT; + outw(devpriv->config_bits, dev->iobase + CONFIG_REG); + + return 0; +}; + +static void a2150_detach(struct comedi_device *dev) +{ + if (dev->iobase) { + outw(APD_BIT | DPD_BIT, dev->iobase + CONFIG_REG); + release_region(dev->iobase, A2150_SIZE); + } + if (dev->irq) + free_irq(dev->irq, dev); + if (devpriv) { + if (devpriv->dma) + free_dma(devpriv->dma); + kfree(devpriv->dma_buffer); + } +}; + +static struct comedi_driver ni_at_a2150_driver = { + .driver_name = "ni_at_a2150", + .module = THIS_MODULE, + .attach = a2150_attach, + .detach = a2150_detach, +}; +module_comedi_driver(ni_at_a2150_driver); + MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL"); |