From: H Hartley Sweeten Date: Tue, 4 Mar 2014 18:30:22 +0000 (-0700) Subject: staging: comedi: pcl818: cleanup ai_cmd() X-Git-Tag: firefly_0821_release~176^2~4193^2~621 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d5f874367ae5e448860ce7df3f63db16246ac980;p=firefly-linux-kernel-4.4.55.git staging: comedi: pcl818: cleanup ai_cmd() Rename this function so it has namespace associated with the driver. The cmd->scan_begin_src is always TRIG_FOLLOW and the only valid cmd->convert_src is TRIG_TIMER or TRIG_EXT so pcl818_ai_cmd_mode() is always called with a 'mode' of 1 or 3. The 'mode' actually indicates the trigger source. Absorb pcl818_ai_cmd_mode() into this function and simplify the code. This also removes the need for a forward declaration. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/pcl818.c b/drivers/staging/comedi/drivers/pcl818.c index c4f9d54ca0a6..84faf38b8c9f 100644 --- a/drivers/staging/comedi/drivers/pcl818.c +++ b/drivers/staging/comedi/drivers/pcl818.c @@ -322,10 +322,6 @@ struct pcl818_private { unsigned int ai_cmd_canceled:1; }; -static int check_channel_list(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned int *chanlist, unsigned int n_chan); - static void pcl818_start_pacer(struct comedi_device *dev, bool load_counters) { struct pcl818_private *devpriv = dev->private; @@ -677,58 +673,6 @@ static irqreturn_t pcl818_interrupt(int irq, void *d) return IRQ_HANDLED; } -static int pcl818_ai_cmd_mode(int mode, struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcl818_private *devpriv = dev->private; - struct comedi_cmd *cmd = &s->async->cmd; - unsigned int ctrl = 0; - unsigned int seglen; - - if (devpriv->ai_cmd_running) - return -EBUSY; - - pcl818_start_pacer(dev, false); - - seglen = check_channel_list(dev, s, cmd->chanlist, cmd->chanlist_len); - if (seglen < 1) - return -EINVAL; - pcl818_ai_setup_chanlist(dev, cmd->chanlist, seglen); - - udelay(1); - - devpriv->ai_act_scan = cmd->stop_arg; - devpriv->ai_act_chan = 0; - devpriv->ai_cmd_running = 1; - devpriv->ai_cmd_canceled = 0; - devpriv->act_chanlist_pos = 0; - devpriv->dma_runs_to_end = 0; - - outb(0, dev->iobase + PCL818_CNTENABLE); /* enable pacer */ - - if (mode == 1) - ctrl |= PCL818_CTRL_PACER_TRIG; - else - ctrl |= PCL818_CTRL_EXT_TRIG; - - if (devpriv->dma) { - pcl818_ai_setup_dma(dev, s); - - ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq) | - PCL818_CTRL_DMAE; - } else if (devpriv->usefifo) { - /* enable FIFO */ - outb(1, dev->iobase + PCL818_FI_ENABLE); - } else { - ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq); - } - outb(ctrl, dev->iobase + PCL818_CTRL_REG); - - pcl818_start_pacer(dev, mode == 1); - - return 0; -} - static int check_channel_list(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int *chanlist, unsigned int n_chan) @@ -869,25 +813,56 @@ static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, return 0; } -static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) +static int pcl818_ai_cmd(struct comedi_device *dev, + struct comedi_subdevice *s) { struct pcl818_private *devpriv = dev->private; struct comedi_cmd *cmd = &s->async->cmd; - int retval; + unsigned int ctrl = 0; + unsigned int seglen; + + if (devpriv->ai_cmd_running) + return -EBUSY; + + pcl818_start_pacer(dev, false); + + seglen = check_channel_list(dev, s, cmd->chanlist, cmd->chanlist_len); + if (seglen < 1) + return -EINVAL; + pcl818_ai_setup_chanlist(dev, cmd->chanlist, seglen); devpriv->ai_data_len = s->async->prealloc_bufsz; + devpriv->ai_act_scan = cmd->stop_arg; + devpriv->ai_act_chan = 0; + devpriv->ai_cmd_running = 1; + devpriv->ai_cmd_canceled = 0; + devpriv->act_chanlist_pos = 0; + devpriv->dma_runs_to_end = 0; - if (cmd->scan_begin_src == TRIG_FOLLOW) { /* mode 1, 3 */ - if (cmd->convert_src == TRIG_TIMER) { /* mode 1 */ - retval = pcl818_ai_cmd_mode(1, dev, s); - return retval; - } - if (cmd->convert_src == TRIG_EXT) { /* mode 3 */ - return pcl818_ai_cmd_mode(3, dev, s); - } + if (cmd->convert_src == TRIG_TIMER) + ctrl |= PCL818_CTRL_PACER_TRIG; + else + ctrl |= PCL818_CTRL_EXT_TRIG; + + outb(0, dev->iobase + PCL818_CNTENABLE); /* enable pacer */ + + if (devpriv->dma) { + pcl818_ai_setup_dma(dev, s); + + ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq) | + PCL818_CTRL_DMAE; + } else if (devpriv->usefifo) { + /* enable FIFO */ + outb(1, dev->iobase + PCL818_FI_ENABLE); + } else { + ctrl |= PCL818_CTRL_INTE | PCL818_CTRL_IRQ(dev->irq); } + outb(ctrl, dev->iobase + PCL818_CTRL_REG); - return -1; + if (cmd->convert_src == TRIG_TIMER) + pcl818_start_pacer(dev, true); + + return 0; } static int pcl818_ai_cancel(struct comedi_device *dev, @@ -1188,7 +1163,7 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it) s->subdev_flags |= SDF_CMD_READ; s->len_chanlist = s->n_chan; s->do_cmdtest = ai_cmdtest; - s->do_cmd = ai_cmd; + s->do_cmd = pcl818_ai_cmd; s->cancel = pcl818_ai_cancel; }