diff options
| -rw-r--r-- | drivers/staging/comedi/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/staging/comedi/drivers/das1800.c | 81 |
2 files changed, 30 insertions, 52 deletions
diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig index fbff2fa31778..f088685b4287 100644 --- a/drivers/staging/comedi/Kconfig +++ b/drivers/staging/comedi/Kconfig @@ -316,6 +316,7 @@ config COMEDI_DAS800 config COMEDI_DAS1800 tristate "DAS1800 and compatible ISA card support" select COMEDI_ISADMA if ISA_DMA_API + select COMEDI_8254 ---help--- Enable support for DAS1800 and compatible ISA cards Keithley Metrabyte DAS-1701ST, DAS-1701ST-DA, DAS-1701/AO, diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c index 0790a28828de..3eb02e8d6103 100644 --- a/drivers/staging/comedi/drivers/das1800.c +++ b/drivers/staging/comedi/drivers/das1800.c @@ -103,7 +103,7 @@ TODO: #include "comedi_isadma.h" #include "comedi_fc.h" -#include "8253.h" +#include "comedi_8254.h" /* misc. defines */ #define DAS1800_SIZE 16 /* uses 16 io addresses */ @@ -422,8 +422,6 @@ static const struct das1800_board das1800_boards[] = { struct das1800_private { struct comedi_isadma *dma; - unsigned int divisor1; /* value to load into board's counter 1 for timed conversions */ - unsigned int divisor2; /* value to load into board's counter 2 for timed conversions */ int irq_dma_bits; /* bits for control register b */ /* dma bits for control register b, stored so that dma can be * turned on and off */ @@ -731,7 +729,6 @@ static int das1800_ai_do_cmdtest(struct comedi_device *dev, struct comedi_cmd *cmd) { const struct das1800_board *thisboard = dev->board_ptr; - struct das1800_private *devpriv = dev->private; int err = 0; unsigned int arg; @@ -795,35 +792,23 @@ static int das1800_ai_do_cmdtest(struct comedi_device *dev, cmd->convert_src == TRIG_TIMER) { /* we are not in burst mode */ arg = cmd->convert_arg; - i8253_cascade_ns_to_timer(I8254_OSC_BASE_5MHZ, - &devpriv->divisor1, - &devpriv->divisor2, - &cmd->convert_arg, cmd->flags); - if (arg != cmd->convert_arg) - err++; + comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); + err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg); } else if (cmd->convert_src == TRIG_TIMER) { /* we are in burst mode */ - arg = cmd->convert_arg; - cmd->convert_arg = burst_convert_arg(cmd->convert_arg, - cmd->flags); - if (arg != cmd->convert_arg) - err++; + arg = burst_convert_arg(cmd->convert_arg, cmd->flags); + err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg); if (cmd->scan_begin_src == TRIG_TIMER) { arg = cmd->convert_arg * cmd->chanlist_len; - if (arg > cmd->scan_begin_arg) { - cmd->scan_begin_arg = arg; - err++; - } + err |= cfc_check_trigger_arg_max(&cmd->scan_begin_arg, + arg); arg = cmd->scan_begin_arg; - i8253_cascade_ns_to_timer(I8254_OSC_BASE_5MHZ, - &devpriv->divisor1, - &devpriv->divisor2, - &cmd->scan_begin_arg, - cmd->flags); - if (arg != cmd->scan_begin_arg) - err++; + comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, + cmd->flags); + err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, + arg); } } @@ -910,31 +895,6 @@ static int control_c_bits(const struct comedi_cmd *cmd) return control_c; } -static void das1800_setup_counters(struct comedi_device *dev, - const struct comedi_cmd *cmd) -{ - struct das1800_private *devpriv = dev->private; - unsigned long timer_base = dev->iobase + DAS1800_COUNTER; - - /* setup cascaded counters for conversion/scan frequency */ - if ((cmd->scan_begin_src == TRIG_FOLLOW || - cmd->scan_begin_src == TRIG_TIMER) && - cmd->convert_src == TRIG_TIMER) { - i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY); - i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY); - - i8254_write(timer_base, 0, 1, devpriv->divisor1); - i8254_write(timer_base, 0, 2, devpriv->divisor2); - } - - /* setup counter 0 for 'about triggering' */ - if (cmd->stop_src == TRIG_EXT) { - i8254_set_mode(timer_base, 0, 0, I8254_MODE0 | I8254_BINARY); - - i8254_write(timer_base, 0, 0, 1); - } -} - static unsigned int das1800_ai_transfer_size(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int maxbytes, @@ -1053,7 +1013,19 @@ static int das1800_ai_do_cmd(struct comedi_device *dev, /* setup card and start */ program_chanlist(dev, cmd); - das1800_setup_counters(dev, cmd); + + /* setup cascaded counters for conversion/scan frequency */ + if ((cmd->scan_begin_src == TRIG_FOLLOW || + cmd->scan_begin_src == TRIG_TIMER) && + cmd->convert_src == TRIG_TIMER) { + comedi_8254_update_divisors(dev->pacer); + comedi_8254_pacer_enable(dev->pacer, 1, 2, true); + } + + /* setup counter 0 for 'about triggering' */ + if (cmd->stop_src == TRIG_EXT) + comedi_8254_load(dev->pacer, 0, 1, I8254_MODE0 | I8254_BINARY); + das1800_ai_setup_dma(dev, s); outb(control_c, dev->iobase + DAS1800_CONTROL_C); /* set conversion rate and length for burst mode */ @@ -1378,6 +1350,11 @@ static int das1800_attach(struct comedi_device *dev, if (!devpriv->fifo_buf) return -ENOMEM; + dev->pacer = comedi_8254_init(dev->iobase + DAS1800_COUNTER, + I8254_OSC_BASE_5MHZ, I8254_IO8, 0); + if (!dev->pacer) + return -ENOMEM; + ret = comedi_alloc_subdevices(dev, 4); if (ret) return ret; |