diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/quatech_daqp_cs.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/quatech_daqp_cs.c | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c b/drivers/staging/comedi/drivers/quatech_daqp_cs.c index 8b274b708259..a91db6c42028 100644 --- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c +++ b/drivers/staging/comedi/drivers/quatech_daqp_cs.c @@ -56,6 +56,8 @@ Devices: [Quatech] DAQP-208 (daqp), DAQP-308 #include <pcmcia/cisreg.h> #include <pcmcia/ds.h> +#include <linux/completion.h> + /* Maximum number of separate DAQP devices we'll allow */ #define MAX_DEV 4 @@ -67,7 +69,7 @@ struct local_info_t { enum { semaphore, buffer } interrupt_mode; - struct semaphore eos; + struct completion eos; struct comedi_device *dev; struct comedi_subdevice *s; @@ -238,14 +240,13 @@ static int daqp_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) /* Interrupt handler * * Operates in one of two modes. If local->interrupt_mode is - * 'semaphore', just signal the local->eos semaphore and return + * 'semaphore', just signal the local->eos completion and return * (one-shot mode). Otherwise (continuous mode), read data in from * the card, transfer it to the buffer provided by the higher-level * comedi kernel module, and signal various comedi callback routines, * which run pretty quick. */ - -static void daqp_interrupt(int irq, void *dev_id) +static enum irqreturn daqp_interrupt(int irq, void *dev_id) { struct local_info_t *local = (struct local_info_t *)dev_id; struct comedi_device *dev; @@ -256,39 +257,39 @@ static void daqp_interrupt(int irq, void *dev_id) if (local == NULL) { printk(KERN_WARNING "daqp_interrupt(): irq %d for unknown device.\n", irq); - return; + return IRQ_NONE; } dev = local->dev; if (dev == NULL) { printk(KERN_WARNING "daqp_interrupt(): NULL comedi_device.\n"); - return; + return IRQ_NONE; } if (!dev->attached) { printk(KERN_WARNING "daqp_interrupt(): struct comedi_device not yet attached.\n"); - return; + return IRQ_NONE; } s = local->s; if (s == NULL) { printk(KERN_WARNING "daqp_interrupt(): NULL comedi_subdevice.\n"); - return; + return IRQ_NONE; } if ((struct local_info_t *)s->private != local) { printk(KERN_WARNING "daqp_interrupt(): invalid comedi_subdevice.\n"); - return; + return IRQ_NONE; } switch (local->interrupt_mode) { case semaphore: - up(&local->eos); + complete(&local->eos); break; case buffer: @@ -340,6 +341,7 @@ static void daqp_interrupt(int irq, void *dev_id) comedi_event(dev, s); } + return IRQ_HANDLED; } /* One-shot analog data acquisition routine */ @@ -401,8 +403,7 @@ static int daqp_ai_insn_read(struct comedi_device *dev, return -1; } - /* Make sure semaphore is blocked */ - sema_init(&local->eos, 0); + init_completion(&local->eos); local->interrupt_mode = semaphore; local->dev = dev; local->s = s; @@ -413,9 +414,9 @@ static int daqp_ai_insn_read(struct comedi_device *dev, outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, dev->iobase + DAQP_COMMAND); - /* Wait for interrupt service routine to unblock semaphore */ + /* Wait for interrupt service routine to unblock completion */ /* Maybe could use a timeout here, but it's interruptible */ - if (down_interruptible(&local->eos)) + if (wait_for_completion_interruptible(&local->eos)) return -EINTR; data[i] = inb(dev->iobase + DAQP_FIFO); @@ -580,7 +581,7 @@ static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { struct local_info_t *local = (struct local_info_t *)s->private; struct comedi_cmd *cmd = &s->async->cmd; - int counter = 100; + int counter; int scanlist_start_on_every_entry; int threshold; @@ -613,14 +614,14 @@ static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) */ if (cmd->convert_src == TRIG_TIMER) { - int counter = daqp_ns_to_timer(&cmd->convert_arg, + counter = daqp_ns_to_timer(&cmd->convert_arg, cmd->flags & TRIG_ROUND_MASK); outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); scanlist_start_on_every_entry = 1; } else { - int counter = daqp_ns_to_timer(&cmd->scan_begin_arg, + counter = daqp_ns_to_timer(&cmd->scan_begin_arg, cmd->flags & TRIG_ROUND_MASK); outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); @@ -755,7 +756,7 @@ static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) /* Reset any pending interrupts (my card has a tendancy to require * require multiple reads on the status register to achieve this) */ - + counter = 100; while (--counter && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; if (!counter) { @@ -1215,8 +1216,11 @@ static struct pcmcia_device_id daqp_cs_id_table[] = { }; MODULE_DEVICE_TABLE(pcmcia, daqp_cs_id_table); +MODULE_AUTHOR("Brent Baccala <baccala@freesoft.org>"); +MODULE_DESCRIPTION("Comedi driver for Quatech DAQP PCMCIA data capture cards"); +MODULE_LICENSE("GPL"); -struct pcmcia_driver daqp_cs_driver = { +static struct pcmcia_driver daqp_cs_driver = { .probe = daqp_cs_attach, .remove = daqp_cs_detach, .suspend = daqp_cs_suspend, |