From 5d3b0d1859722a855b0310fcdc34c2e545cc1c7d Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Fri, 1 Jun 2012 17:31:45 +0100 Subject: [PATCH] staging: comedi: amplc_pci230: Remove forward declarations 4 Move these functions and remove their forward declarations: pci230_ai_stop(), pci230_handle_ai(). Also move pci230_ai_cancel() for aesthetic reasons. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/amplc_pci230.c | 310 +++++++++--------- 1 file changed, 146 insertions(+), 164 deletions(-) diff --git a/drivers/staging/comedi/drivers/amplc_pci230.c b/drivers/staging/comedi/drivers/amplc_pci230.c index 0e9c4ba6e6c0..30487be11650 100644 --- a/drivers/staging/comedi/drivers/amplc_pci230.c +++ b/drivers/staging/comedi/drivers/amplc_pci230.c @@ -579,11 +579,6 @@ static const struct comedi_lrange pci230_ao_range = { 2, { /* PCI230 daccon bipolar flag for each analogue output range. */ static const unsigned char pci230_ao_bipolar[2] = { 0, 1 }; -static void pci230_ai_stop(struct comedi_device *dev, - struct comedi_subdevice *s); -static void pci230_handle_ai(struct comedi_device *dev, - struct comedi_subdevice *s); - static short pci230_ai_read(struct comedi_device *dev) { const struct pci230_board *thisboard = comedi_board(dev); @@ -2103,6 +2098,52 @@ static int pci230_ai_inttrig_scan_begin(struct comedi_device *dev, return 1; } +static void pci230_ai_stop(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct pci230_private *devpriv = dev->private; + unsigned long irqflags; + struct comedi_cmd *cmd; + int started; + + spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags); + started = test_and_clear_bit(AI_CMD_STARTED, &devpriv->state); + spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags); + if (!started) + return; + cmd = &s->async->cmd; + if (cmd->convert_src == TRIG_TIMER) { + /* Stop conversion rate generator. */ + pci230_cancel_ct(dev, 2); + } + if (cmd->scan_begin_src != TRIG_FOLLOW) { + /* Stop scan period monostable. */ + pci230_cancel_ct(dev, 0); + } + spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); + /* Disable ADC interrupt and wait for interrupt routine to finish + * running unless we are called from the interrupt routine. */ + devpriv->int_en &= ~PCI230_INT_ADC; + while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) { + spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); + spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); + } + if (devpriv->ier != devpriv->int_en) { + devpriv->ier = devpriv->int_en; + outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE); + } + spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); + /* Reset FIFO, disable FIFO and set start conversion source to none. + * Keep se/diff and bip/uni settings */ + devpriv->adccon = (devpriv->adccon & (PCI230_ADC_IR_MASK + | PCI230_ADC_IM_MASK)) | + PCI230_ADC_TRIG_NONE; + outw(devpriv->adccon | PCI230_ADC_FIFO_RESET, + dev->iobase + PCI230_ADCCON); + /* Release resources. */ + put_all_resources(dev, OWNER_AICMD); +} + static void pci230_ai_start(struct comedi_device *dev, struct comedi_subdevice *s) { @@ -2255,6 +2296,99 @@ static int pci230_ai_inttrig_start(struct comedi_device *dev, return 1; } +static void pci230_handle_ai(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + struct pci230_private *devpriv = dev->private; + unsigned int events = 0; + unsigned int status_fifo; + unsigned int i; + unsigned int todo; + unsigned int fifoamount; + struct comedi_async *async = s->async; + unsigned int scanlen = async->cmd.scan_end_arg; + + /* Determine number of samples to read. */ + if (devpriv->ai_continuous) { + todo = PCI230_ADC_FIFOLEVEL_HALFFULL; + } else if (devpriv->ai_scan_count == 0) { + todo = 0; + } else if ((devpriv->ai_scan_count > PCI230_ADC_FIFOLEVEL_HALFFULL) + || (scanlen > PCI230_ADC_FIFOLEVEL_HALFFULL)) { + todo = PCI230_ADC_FIFOLEVEL_HALFFULL; + } else { + todo = (devpriv->ai_scan_count * scanlen) + - devpriv->ai_scan_pos; + if (todo > PCI230_ADC_FIFOLEVEL_HALFFULL) + todo = PCI230_ADC_FIFOLEVEL_HALFFULL; + } + if (todo == 0) + return; + fifoamount = 0; + for (i = 0; i < todo; i++) { + if (fifoamount == 0) { + /* Read FIFO state. */ + status_fifo = inw(dev->iobase + PCI230_ADCCON); + if ((status_fifo & PCI230_ADC_FIFO_FULL_LATCHED) != 0) { + /* Report error otherwise FIFO overruns will go + * unnoticed by the caller. */ + comedi_error(dev, "AI FIFO overrun"); + events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR; + break; + } else if ((status_fifo & PCI230_ADC_FIFO_EMPTY) != 0) { + /* FIFO empty. */ + break; + } else if ((status_fifo & PCI230_ADC_FIFO_HALF) != 0) { + /* FIFO half full. */ + fifoamount = PCI230_ADC_FIFOLEVEL_HALFFULL; + } else { + /* FIFO not empty. */ + if (devpriv->hwver > 0) { + /* Read PCI230+/260+ ADC FIFO level. */ + fifoamount = inw(dev->iobase + + PCI230P_ADCFFLEV); + if (fifoamount == 0) { + /* Shouldn't happen. */ + break; + } + } else { + fifoamount = 1; + } + } + } + /* Read sample and store in Comedi's circular buffer. */ + if (comedi_buf_put(async, pci230_ai_read(dev)) == 0) { + events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW; + comedi_error(dev, "AI buffer overflow"); + break; + } + fifoamount--; + devpriv->ai_scan_pos++; + if (devpriv->ai_scan_pos == scanlen) { + /* End of scan. */ + devpriv->ai_scan_pos = 0; + devpriv->ai_scan_count--; + async->events |= COMEDI_CB_EOS; + } + } + if (!devpriv->ai_continuous && (devpriv->ai_scan_count == 0)) { + /* End of acquisition. */ + events |= COMEDI_CB_EOA; + } else { + /* More samples required, tell Comedi to block. */ + events |= COMEDI_CB_BLOCK; + } + async->events |= events; + if ((async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR | + COMEDI_CB_OVERFLOW)) != 0) { + /* disable hardware conversions */ + pci230_ai_stop(dev, s); + } else { + /* update FIFO interrupt trigger level */ + pci230_ai_update_fifo_trigger_level(dev, s); + } +} + static int pci230_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { struct pci230_private *devpriv = dev->private; @@ -2449,6 +2583,13 @@ static int pci230_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) return 0; } +static int pci230_ai_cancel(struct comedi_device *dev, + struct comedi_subdevice *s) +{ + pci230_ai_stop(dev, s); + return 0; +} + /* Interrupt handler */ static irqreturn_t pci230_interrupt(int irq, void *d) { @@ -2514,165 +2655,6 @@ static irqreturn_t pci230_interrupt(int irq, void *d) return IRQ_HANDLED; } -static void pci230_handle_ai(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pci230_private *devpriv = dev->private; - unsigned int events = 0; - unsigned int status_fifo; - unsigned int i; - unsigned int todo; - unsigned int fifoamount; - struct comedi_async *async = s->async; - unsigned int scanlen = async->cmd.scan_end_arg; - - /* Determine number of samples to read. */ - if (devpriv->ai_continuous) { - todo = PCI230_ADC_FIFOLEVEL_HALFFULL; - } else if (devpriv->ai_scan_count == 0) { - todo = 0; - } else if ((devpriv->ai_scan_count > PCI230_ADC_FIFOLEVEL_HALFFULL) - || (scanlen > PCI230_ADC_FIFOLEVEL_HALFFULL)) { - todo = PCI230_ADC_FIFOLEVEL_HALFFULL; - } else { - todo = (devpriv->ai_scan_count * scanlen) - - devpriv->ai_scan_pos; - if (todo > PCI230_ADC_FIFOLEVEL_HALFFULL) - todo = PCI230_ADC_FIFOLEVEL_HALFFULL; - - } - - if (todo == 0) - return; - - - fifoamount = 0; - for (i = 0; i < todo; i++) { - if (fifoamount == 0) { - /* Read FIFO state. */ - status_fifo = inw(dev->iobase + PCI230_ADCCON); - - if ((status_fifo & PCI230_ADC_FIFO_FULL_LATCHED) != 0) { - /* Report error otherwise FIFO overruns will go - * unnoticed by the caller. */ - comedi_error(dev, "AI FIFO overrun"); - events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR; - break; - } else if ((status_fifo & PCI230_ADC_FIFO_EMPTY) != 0) { - /* FIFO empty. */ - break; - } else if ((status_fifo & PCI230_ADC_FIFO_HALF) != 0) { - /* FIFO half full. */ - fifoamount = PCI230_ADC_FIFOLEVEL_HALFFULL; - } else { - /* FIFO not empty. */ - if (devpriv->hwver > 0) { - /* Read PCI230+/260+ ADC FIFO level. */ - fifoamount = inw(dev->iobase - + PCI230P_ADCFFLEV); - if (fifoamount == 0) { - /* Shouldn't happen. */ - break; - } - } else { - fifoamount = 1; - } - } - } - - /* Read sample and store in Comedi's circular buffer. */ - if (comedi_buf_put(async, pci230_ai_read(dev)) == 0) { - events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW; - comedi_error(dev, "AI buffer overflow"); - break; - } - fifoamount--; - devpriv->ai_scan_pos++; - if (devpriv->ai_scan_pos == scanlen) { - /* End of scan. */ - devpriv->ai_scan_pos = 0; - devpriv->ai_scan_count--; - async->events |= COMEDI_CB_EOS; - } - } - - if (!devpriv->ai_continuous && (devpriv->ai_scan_count == 0)) { - /* End of acquisition. */ - events |= COMEDI_CB_EOA; - } else { - /* More samples required, tell Comedi to block. */ - events |= COMEDI_CB_BLOCK; - } - async->events |= events; - - if ((async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR | - COMEDI_CB_OVERFLOW)) != 0) { - /* disable hardware conversions */ - pci230_ai_stop(dev, s); - } else { - /* update FIFO interrupt trigger level */ - pci230_ai_update_fifo_trigger_level(dev, s); - } -} - -static void pci230_ai_stop(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pci230_private *devpriv = dev->private; - unsigned long irqflags; - struct comedi_cmd *cmd; - int started; - - spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags); - started = test_and_clear_bit(AI_CMD_STARTED, &devpriv->state); - spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags); - if (!started) - return; - - - cmd = &s->async->cmd; - if (cmd->convert_src == TRIG_TIMER) { - /* Stop conversion rate generator. */ - pci230_cancel_ct(dev, 2); - } - if (cmd->scan_begin_src != TRIG_FOLLOW) { - /* Stop scan period monostable. */ - pci230_cancel_ct(dev, 0); - } - - spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); - /* Disable ADC interrupt and wait for interrupt routine to finish - * running unless we are called from the interrupt routine. */ - devpriv->int_en &= ~PCI230_INT_ADC; - while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) { - spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); - spin_lock_irqsave(&devpriv->isr_spinlock, irqflags); - } - if (devpriv->ier != devpriv->int_en) { - devpriv->ier = devpriv->int_en; - outb(devpriv->ier, devpriv->iobase1 + PCI230_INT_SCE); - } - spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags); - - /* Reset FIFO, disable FIFO and set start conversion source to none. - * Keep se/diff and bip/uni settings */ - devpriv->adccon = (devpriv->adccon & (PCI230_ADC_IR_MASK - | PCI230_ADC_IM_MASK)) | - PCI230_ADC_TRIG_NONE; - outw(devpriv->adccon | PCI230_ADC_FIFO_RESET, - dev->iobase + PCI230_ADCCON); - - /* Release resources. */ - put_all_resources(dev, OWNER_AICMD); -} - -static int pci230_ai_cancel(struct comedi_device *dev, - struct comedi_subdevice *s) -{ - pci230_ai_stop(dev, s); - return 0; -} - /* Check if PCI device matches a specific board. */ static bool pci230_match_pci_board(const struct pci230_board *board, struct pci_dev *pci_dev) -- 2.39.5