From: Ian Abbott Date: Mon, 1 Sep 2014 11:03:58 +0000 (+0100) Subject: staging: comedi: amplc_pci230: reduce indentation in pci230_ai_start() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=39455e17fa9c453c3671b34ca67d79904fafccb8;p=linux-beck.git staging: comedi: amplc_pci230: reduce indentation in pci230_ai_start() Signed-off-by: Ian Abbott Reviewed-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/amplc_pci230.c b/drivers/staging/comedi/drivers/amplc_pci230.c index b0313c8d4836..27ff5bec8bc7 100644 --- a/drivers/staging/comedi/drivers/amplc_pci230.c +++ b/drivers/staging/comedi/drivers/amplc_pci230.c @@ -1928,139 +1928,134 @@ static void pci230_ai_start(struct comedi_device *dev, async->events |= COMEDI_CB_EOA; pci230_ai_stop(dev, s); comedi_event(dev, s); - } else { - /* Enable ADC FIFO trigger level interrupt. */ - spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); - devpriv->int_en |= PCI230_INT_ADC; - devpriv->ier |= PCI230_INT_ADC; - outb(devpriv->ier, dev->iobase + PCI230_INT_SCE); - spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); + return; + } - /* - * Update conversion trigger source which is currently set - * to CT2 output, which is currently stuck high. - */ - switch (cmd->convert_src) { - default: - conv = PCI230_ADC_TRIG_NONE; - break; - case TRIG_TIMER: - /* Using CT2 output. */ - conv = PCI230_ADC_TRIG_Z2CT2; - break; - case TRIG_EXT: - if (cmd->convert_arg & CR_EDGE) { - if ((cmd->convert_arg & CR_INVERT) == 0) { - /* Trigger on +ve edge. */ - conv = PCI230_ADC_TRIG_EXTP; - } else { - /* Trigger on -ve edge. */ - conv = PCI230_ADC_TRIG_EXTN; - } + /* Enable ADC FIFO trigger level interrupt. */ + spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); + devpriv->int_en |= PCI230_INT_ADC; + devpriv->ier |= PCI230_INT_ADC; + outb(devpriv->ier, dev->iobase + PCI230_INT_SCE); + spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); + + /* + * Update conversion trigger source which is currently set + * to CT2 output, which is currently stuck high. + */ + switch (cmd->convert_src) { + default: + conv = PCI230_ADC_TRIG_NONE; + break; + case TRIG_TIMER: + /* Using CT2 output. */ + conv = PCI230_ADC_TRIG_Z2CT2; + break; + case TRIG_EXT: + if (cmd->convert_arg & CR_EDGE) { + if ((cmd->convert_arg & CR_INVERT) == 0) { + /* Trigger on +ve edge. */ + conv = PCI230_ADC_TRIG_EXTP; } else { - /* Backwards compatibility. */ - if (cmd->convert_arg) { - /* Trigger on +ve edge. */ - conv = PCI230_ADC_TRIG_EXTP; - } else { - /* Trigger on -ve edge. */ - conv = PCI230_ADC_TRIG_EXTN; - } + /* Trigger on -ve edge. */ + conv = PCI230_ADC_TRIG_EXTN; + } + } else { + /* Backwards compatibility. */ + if (cmd->convert_arg) { + /* Trigger on +ve edge. */ + conv = PCI230_ADC_TRIG_EXTP; + } else { + /* Trigger on -ve edge. */ + conv = PCI230_ADC_TRIG_EXTN; } - break; - case TRIG_INT: - /* - * Use CT2 output for software trigger due to problems - * in differential mode on PCI230/260. - */ - conv = PCI230_ADC_TRIG_Z2CT2; - break; } - devpriv->adccon = - (devpriv->adccon & ~PCI230_ADC_TRIG_MASK) | conv; - outw(devpriv->adccon, devpriv->daqio + PCI230_ADCCON); - if (cmd->convert_src == TRIG_INT) - async->inttrig = pci230_ai_inttrig_convert; - + break; + case TRIG_INT: /* - * Update FIFO interrupt trigger level, which is currently - * set to "full". + * Use CT2 output for software trigger due to problems + * in differential mode on PCI230/260. */ - pci230_ai_update_fifo_trigger_level(dev, s); - if (cmd->convert_src == TRIG_TIMER) { - /* Update timer gates. */ - unsigned char zgat; + conv = PCI230_ADC_TRIG_Z2CT2; + break; + } + devpriv->adccon = (devpriv->adccon & ~PCI230_ADC_TRIG_MASK) | conv; + outw(devpriv->adccon, devpriv->daqio + PCI230_ADCCON); + if (cmd->convert_src == TRIG_INT) + async->inttrig = pci230_ai_inttrig_convert; + + /* + * Update FIFO interrupt trigger level, which is currently + * set to "full". + */ + pci230_ai_update_fifo_trigger_level(dev, s); + if (cmd->convert_src == TRIG_TIMER) { + /* Update timer gates. */ + unsigned char zgat; - if (cmd->scan_begin_src != TRIG_FOLLOW) { + if (cmd->scan_begin_src != TRIG_FOLLOW) { + /* + * Conversion timer CT2 needs to be gated by + * inverted output of monostable CT2. + */ + zgat = GAT_CONFIG(2, GAT_NOUTNM2); + } else { + /* + * Conversion timer CT2 needs to be gated on + * continuously. + */ + zgat = GAT_CONFIG(2, GAT_VCC); + } + outb(zgat, dev->iobase + PCI230_ZGAT_SCE); + if (cmd->scan_begin_src != TRIG_FOLLOW) { + /* Set monostable CT0 trigger source. */ + switch (cmd->scan_begin_src) { + default: + zgat = GAT_CONFIG(0, GAT_VCC); + break; + case TRIG_EXT: /* - * Conversion timer CT2 needs to be gated by - * inverted output of monostable CT2. + * For CT0 on PCI230, the external trigger + * (gate) signal comes from PPC0, which is + * channel 16 of the DIO subdevice. The + * application needs to configure this as an + * input in order to use it as an external scan + * trigger. */ - zgat = GAT_CONFIG(2, GAT_NOUTNM2); - } else { + zgat = GAT_CONFIG(0, GAT_EXT); + break; + case TRIG_TIMER: /* - * Conversion timer CT2 needs to be gated on - * continuously. + * Monostable CT0 triggered by rising edge on + * inverted output of CT1 (falling edge on CT1). */ - zgat = GAT_CONFIG(2, GAT_VCC); + zgat = GAT_CONFIG(0, GAT_NOUTNM2); + break; + case TRIG_INT: + /* + * Monostable CT0 is triggered by inttrig + * function waggling the CT0 gate source. + */ + zgat = GAT_CONFIG(0, GAT_VCC); + break; } outb(zgat, dev->iobase + PCI230_ZGAT_SCE); - if (cmd->scan_begin_src != TRIG_FOLLOW) { - /* Set monostable CT0 trigger source. */ - switch (cmd->scan_begin_src) { - default: - zgat = GAT_CONFIG(0, GAT_VCC); - break; - case TRIG_EXT: - /* - * For CT0 on PCI230, the external - * trigger (gate) signal comes from - * PPC0, which is channel 16 of the DIO - * subdevice. The application needs to - * configure this as an input in order - * to use it as an external scan - * trigger. - */ - zgat = GAT_CONFIG(0, GAT_EXT); - break; - case TRIG_TIMER: - /* - * Monostable CT0 triggered by rising - * edge on inverted output of CT1 - * (falling edge on CT1). - */ - zgat = GAT_CONFIG(0, GAT_NOUTNM2); - break; - case TRIG_INT: - /* - * Monostable CT0 is triggered by - * inttrig function waggling the CT0 - * gate source. - */ - zgat = GAT_CONFIG(0, GAT_VCC); - break; - } + switch (cmd->scan_begin_src) { + case TRIG_TIMER: + /* + * Scan period timer CT1 needs to be + * gated on to start counting. + */ + zgat = GAT_CONFIG(1, GAT_VCC); outb(zgat, dev->iobase + PCI230_ZGAT_SCE); - switch (cmd->scan_begin_src) { - case TRIG_TIMER: - /* - * Scan period timer CT1 needs to be - * gated on to start counting. - */ - zgat = GAT_CONFIG(1, GAT_VCC); - outb(zgat, - dev->iobase + PCI230_ZGAT_SCE); - break; - case TRIG_INT: - async->inttrig = - pci230_ai_inttrig_scan_begin; - break; - } + break; + case TRIG_INT: + async->inttrig = pci230_ai_inttrig_scan_begin; + break; } - } else if (cmd->convert_src != TRIG_INT) { - /* No longer need Z2-CT2. */ - pci230_release_shared(dev, RES_Z2CT2, OWNER_AICMD); } + } else if (cmd->convert_src != TRIG_INT) { + /* No longer need Z2-CT2. */ + pci230_release_shared(dev, RES_Z2CT2, OWNER_AICMD); } }