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Message-ID: <DC148C5AA1CEBA4E87973D432B1C2D8825E04EF4@P3PWEX4MB008.ex4.secureserver.net>
Date: Wed, 16 Apr 2014 21:54:58 +0000
From: Hartley Sweeten <HartleyS@...ionengravers.com>
To: Chase Southwood <chase.southwood@...oo.com>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "abbotti@....co.uk" <abbotti@....co.uk>,
"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/2 v2] staging: comedi: addi_apci_1564: fixup and
absorb apci1564_reset()
On Tuesday, April 15, 2014 11:58 PM, Chase Southwood wrote:
> We can remove this function from the boardinfo and move the code from
> hwdrv_apci1564.c into addi_apci_1564.c since it is the only reset function
> used by the driver. The function was also messy and failed to reset a few
> registers, these issues were fixed on the move.
>
> Signed-off-by: Chase Southwood <chase.southwood@...oo.com>
> ---
> 2: *Changed order of register accesses for digital input registers back to
> original ordering.
> *Removed read of digital output status register and reordered the accesses
> of digital output registers to agree with the order found in addi_apci_2032.
> *Fixed copy/paste error in the counter register reset lines.
>
> Ian, I addressed your comments as above.
> Chase
> .../comedi/drivers/addi-data/hwdrv_apci1564.c | 28 ---------------
> drivers/staging/comedi/drivers/addi_apci_1564.c | 40 +++++++++++++++++++++-
> 2 files changed, 39 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> index 4db3bea..45617cf 100644
> --- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> +++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> @@ -576,31 +576,3 @@ static void apci1564_interrupt(int irq, void *d)
> }
> return;
> }
> -
> -static int apci1564_reset(struct comedi_device *dev)
> -{
> - struct addi_private *devpriv = dev->private;
> -
> - /* disable the interrupts */
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_IRQ_REG);
> - /* Reset the interrupt status register */
> - inl(devpriv->i_IobaseAmcc + APCI1564_DI_INT_STATUS_REG);
> - /* Disable the and/or interrupt */
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_INT_MODE1_REG);
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_INT_MODE2_REG);
> - devpriv->b_DigitalOutputRegister = 0;
> - ui_Type = 0;
> - /* Resets the output channels */
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DO_REG);
> - /* Disables the interrupt. */
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DO_INT_CTRL_REG);
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_WDOG_RELOAD_REG);
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_TIMER_REG);
> - outl(0x0, devpriv->i_IobaseAmcc + APCI1564_TIMER_CTRL_REG);
> -
> - outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER1));
> - outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER2));
> - outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER3));
> - outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER4));
> - return 0;
> -}
> diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c b/drivers/staging/comedi/drivers/addi_apci_1564.c
> index 11aa0bd..546dad7 100644
> --- a/drivers/staging/comedi/drivers/addi_apci_1564.c
> +++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
> @@ -4,6 +4,7 @@
> #include "../comedidev.h"
> #include "comedi_fc.h"
> #include "amcc_s5933.h"
> +#include "addi_watchdog.h"
>
> #include "addi-data/addi_common.h"
>
> @@ -22,7 +23,6 @@ static const struct addi_board apci1564_boardtypes[] = {
> .i_DoMaxdata = 0xffffffff,
> .i_Timer = 1,
> .interrupt = apci1564_interrupt,
> - .reset = apci1564_reset,
You can't do this yet.
The addi_acpi_1564 driver needs to be separated from addi_common.c before you
can start ripping the callbacks out of this struct.
If you compile test this you will see:
CC [M] drivers/staging/comedi/drivers/addi_apci_1564.o
In file included from drivers/staging/comedi/drivers/addi_apci_1564.c:11:0:
drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c:581:12: warning: 'apci1564_reset' defined but not used [-Wunused-function]
> .di_config = apci1564_di_config,
> .di_bits = apci1564_di_insn_bits,
> .do_config = apci1564_do_config,
> @@ -34,6 +34,44 @@ static const struct addi_board apci1564_boardtypes[] = {
> },
> };
>
> +static int apci1564_reset(struct comedi_device *dev)
> +{
> + struct addi_private *devpriv = dev->private;
> +
> + ui_Type = 0;
> +
> + /* Disable the input interrupts and reset status register */
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_IRQ_REG);
> + inl(devpriv->i_IobaseAmcc + APCI1564_DI_INT_STATUS_REG);
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_INT_MODE1_REG);
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DI_INT_MODE2_REG);
> +
> + /* Reset the output channels and disable interrupts */
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DO_IRQ_REG);
This register is read only. Bit 0 is set if there is a digital output IRQ pending.
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DO_REG);
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_DO_INT_CTRL_REG);
> +
> + /* Reset the watchdog registers */
> + addi_watchdog_reset(devpriv->i_IobaseAmcc + APCI1564_WDOG_REG);
> +
> + /* Reset the timer registers */
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_TIMER_CTRL_REG);
> + outl(0x0, devpriv->i_IobaseAmcc + APCI1564_TIMER_RELOAD_REG);
> +
> + /* Reset the counter registers */
> + outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER1));
> + outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER2));
> + outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER3));
> + outl(0x0, dev->iobase + APCI1564_TCW_CTRL_REG(APCI1564_COUNTER4));
> +
> + outl(0x0, dev->iobase + APCI1564_TCW_RELOAD_REG(APCI1564_COUNTER1));
> + outl(0x0, dev->iobase + APCI1564_TCW_RELOAD_REG(APCI1564_COUNTER2));
> + outl(0x0, dev->iobase + APCI1564_TCW_RELOAD_REG(APCI1564_COUNTER3));
> + outl(0x0, dev->iobase + APCI1564_TCW_RELOAD_REG(APCI1564_COUNTER4));
It's probably not necessary to clear the reload values since you have disabled all the timers.
But, it shouldn't hurt anything.
> +
> + return 0;
> +}
> +
> static int apci1564_auto_attach(struct comedi_device *dev,
> unsigned long context)
> {
Regards,
Hartley
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