From 4ffe2b25732be9cd68ec305f4c727da75462fcd4 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 23 Feb 2015 14:57:52 -0700 Subject: [PATCH] staging: comedi: das16: convert driver to use the comedi_8254 module This driver uses an 8254 timer to generate the pacer clock used for analog input data conversion. Convert it to use the comedi_8254 module to provide support for the 8254 timer. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/Kconfig | 1 + drivers/staging/comedi/drivers/das16.c | 44 +++++++++----------------- 2 files changed, 16 insertions(+), 29 deletions(-) diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig index 77c1c99b1116..30951a3286f6 100644 --- a/drivers/staging/comedi/Kconfig +++ b/drivers/staging/comedi/Kconfig @@ -287,6 +287,7 @@ config COMEDI_DAS08_ISA config COMEDI_DAS16 tristate "DAS-16 compatible ISA and PC/104 card support" select COMEDI_ISADMA if ISA_DMA_API + select COMEDI_8254 select COMEDI_8255 ---help--- Enable support for Keithley Metrabyte/ComputerBoards DAS16 diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c index 2c20311120f1..4b3bdade6596 100644 --- a/drivers/staging/comedi/drivers/das16.c +++ b/drivers/staging/comedi/drivers/das16.c @@ -77,7 +77,7 @@ #include "comedi_isadma.h" #include "comedi_fc.h" -#include "8253.h" +#include "comedi_8254.h" #include "8255.h" #define DAS16_DMA_SIZE 0xff00 /* size in bytes of allocated dma buffer */ @@ -663,18 +663,12 @@ static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s, /* step 4: fix up arguments */ if (cmd->scan_begin_src == TRIG_TIMER) { arg = cmd->scan_begin_arg; - i8253_cascade_ns_to_timer(devpriv->clockbase, - &devpriv->divisor1, - &devpriv->divisor2, - &arg, cmd->flags); + comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg); } if (cmd->convert_src == TRIG_TIMER) { arg = cmd->convert_arg; - i8253_cascade_ns_to_timer(devpriv->clockbase, - &devpriv->divisor1, - &devpriv->divisor2, - &arg, cmd->flags); + comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags); err |= cfc_check_trigger_arg_is(&cmd->convert_arg, arg); } if (err) @@ -693,17 +687,9 @@ static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s, static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns, unsigned int flags) { - struct das16_private_struct *devpriv = dev->private; - unsigned long timer_base = dev->iobase + DAS16_TIMER_BASE_REG; - - i8253_cascade_ns_to_timer(devpriv->clockbase, - &devpriv->divisor1, &devpriv->divisor2, - &ns, flags); - - 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); + comedi_8254_cascade_ns_to_timer(dev->pacer, &ns, flags); + comedi_8254_update_divisors(dev->pacer); + comedi_8254_pacer_enable(dev->pacer, 1, 2, true); return ns; } @@ -935,7 +921,6 @@ static void das16_reset(struct comedi_device *dev) outb(0, dev->iobase + DAS16_STATUS_REG); outb(0, dev->iobase + DAS16_CTRL_REG); outb(0, dev->iobase + DAS16_PACER_REG); - outb(0, dev->iobase + DAS16_TIMER_BASE_REG + i8254_control_reg); } static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) @@ -1039,6 +1024,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it) const struct das16_board *board = dev->board_ptr; struct das16_private_struct *devpriv; struct comedi_subdevice *s; + unsigned int osc_base; unsigned int status; int ret; @@ -1078,21 +1064,21 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it) return -EINVAL; /* get master clock speed */ + osc_base = I8254_OSC_BASE_1MHZ; if (devpriv->can_burst) { status = inb(dev->iobase + DAS1600_STATUS_REG); - if (status & DAS1600_STATUS_CLK_10MHZ) - devpriv->clockbase = I8254_OSC_BASE_10MHZ; - else - devpriv->clockbase = I8254_OSC_BASE_1MHZ; + osc_base = I8254_OSC_BASE_10MHZ; } else { if (it->options[3]) - devpriv->clockbase = I8254_OSC_BASE_1MHZ / - it->options[3]; - else - devpriv->clockbase = I8254_OSC_BASE_1MHZ; + osc_base = I8254_OSC_BASE_1MHZ / it->options[3]; } + dev->pacer = comedi_8254_init(dev->iobase + DAS16_TIMER_BASE_REG, + osc_base, I8254_IO8, 0); + if (!dev->pacer) + return -ENOMEM; + das16_alloc_dma(dev, it->options[2]); ret = comedi_alloc_subdevices(dev, 4 + board->has_8255); -- 2.39.5