From: H Hartley Sweeten Date: Mon, 23 Feb 2015 21:57:48 +0000 (-0700) Subject: staging: comedi: adv_pci_dio: refactor 's8254' boardinfo X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0275299f26ecde814c7e03f3fb5a6fa73c60acd9;p=deliverable%2Flinux.git staging: comedi: adv_pci_dio: refactor 's8254' boardinfo The boardinfo for the 8254 timer is overly complex. The 8254 timer always has 3 channels and the 'regs' and 'specflags' members of diosubd_data are not used. The only necessary information is the base 'addr' offset to the 8254 registers. Replace the 's8254' member with an unsigned long 'timer_regbase'. Use that to determine if the board has an 8254 timer during the attach of the driver. Save the 'timer_regbase' in the subdevice 'private' pointer to use in the subdevice functions. For aesthetics, absorb pci_dio_add_8254() into the driver attach function. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/adv_pci_dio.c b/drivers/staging/comedi/drivers/adv_pci_dio.c index 88244509beb7..fb9de3a33c52 100644 --- a/drivers/staging/comedi/drivers/adv_pci_dio.c +++ b/drivers/staging/comedi/drivers/adv_pci_dio.c @@ -224,7 +224,7 @@ struct diosubd_data { int chans; /* num of chans */ int addr; /* PCI address ofset */ int regs; /* number of registers to read or 8255 - subdevices or 8254 chips */ + subdevices */ unsigned int specflags; /* addon subdevice flags */ }; @@ -237,7 +237,7 @@ struct dio_boardtype { struct diosubd_data sdo[MAX_DO_SUBDEVS]; /* DO chans */ struct diosubd_data sdio[MAX_DIO_SUBDEVG]; /* DIO 8255 chans */ struct diosubd_data boardid; /* card supports board ID switch */ - struct diosubd_data s8254[1]; /* 8254 subdevices */ + unsigned long timer_regbase; enum hw_io_access io_access; }; @@ -280,7 +280,7 @@ static const struct dio_boardtype boardtypes[] = { .sdi[0] = { 32, PCI1735_DI, 4, 0, }, .sdo[0] = { 32, PCI1735_DO, 4, 0, }, .boardid = { 4, PCI1735_BOARDID, 1, SDF_INTERNAL, }, - .s8254[0] = { 3, PCI1735_C8254, 1, 0, }, + .timer_regbase = PCI1735_C8254, .io_access = IO_8b, }, [TYPE_PCI1736] = { @@ -316,7 +316,7 @@ static const struct dio_boardtype boardtypes[] = { .cardtype = TYPE_PCI1751, .nsubdevs = 3, .sdio[0] = { 48, PCI1751_DIO, 2, 0, }, - .s8254[0] = { 3, PCI1751_CNT, 1, 0, }, + .timer_regbase = PCI1751_CNT, .io_access = IO_8b, }, [TYPE_PCI1752] = { @@ -485,12 +485,12 @@ static int pci_8254_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { - const struct diosubd_data *d = (const struct diosubd_data *)s->private; + unsigned long timer_regbase = (unsigned long)s->private; unsigned int chan = CR_CHAN(insn->chanspec); unsigned long flags; spin_lock_irqsave(&s->spin_lock, flags); - data[0] = i8254_read(dev->iobase + d->addr, 0, chan); + data[0] = i8254_read(dev->iobase + timer_regbase, 0, chan); spin_unlock_irqrestore(&s->spin_lock, flags); return 1; } @@ -502,12 +502,12 @@ static int pci_8254_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { - const struct diosubd_data *d = (const struct diosubd_data *)s->private; + unsigned long timer_regbase = (unsigned long)s->private; unsigned int chan = CR_CHAN(insn->chanspec); unsigned long flags; spin_lock_irqsave(&s->spin_lock, flags); - i8254_write(dev->iobase + d->addr, 0, chan, data[0]); + i8254_write(dev->iobase + timer_regbase, 0, chan, data[0]); spin_unlock_irqrestore(&s->spin_lock, flags); return 1; } @@ -519,9 +519,9 @@ static int pci_8254_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { - const struct diosubd_data *d = (const struct diosubd_data *)s->private; + unsigned long timer_regbase = (unsigned long)s->private; + unsigned long iobase = dev->iobase + timer_regbase; unsigned int chan = CR_CHAN(insn->chanspec); - unsigned long iobase = dev->iobase + d->addr; int ret = 0; unsigned long flags; @@ -1011,26 +1011,6 @@ static int pci_dio_add_do(struct comedi_device *dev, return 0; } -/* -============================================================================== -*/ -static int pci_dio_add_8254(struct comedi_device *dev, - struct comedi_subdevice *s, - const struct diosubd_data *d) -{ - s->type = COMEDI_SUBD_COUNTER; - s->subdev_flags = SDF_WRITABLE | SDF_READABLE; - s->n_chan = d->chans; - s->maxdata = 65535; - s->len_chanlist = d->chans; - s->insn_read = pci_8254_insn_read; - s->insn_write = pci_8254_insn_write; - s->insn_config = pci_8254_insn_config; - s->private = (void *)d; - - return 0; -} - static unsigned long pci_dio_override_cardtype(struct pci_dev *pcidev, unsigned long cardtype) { @@ -1126,9 +1106,16 @@ static int pci_dio_auto_attach(struct comedi_device *dev, subdev++; } - if (this_board->s8254[0].chans) { + if (this_board->timer_regbase) { s = &dev->subdevices[subdev]; - pci_dio_add_8254(dev, s, &this_board->s8254[0]); + s->type = COMEDI_SUBD_COUNTER; + s->subdev_flags = SDF_WRITABLE | SDF_READABLE; + s->n_chan = 3; + s->maxdata = 65535; + s->insn_read = pci_8254_insn_read; + s->insn_write = pci_8254_insn_write; + s->insn_config = pci_8254_insn_config; + s->private = (void *)this_board->timer_regbase; subdev++; }