This is a note to let you know that I've just added the patch titled
staging: comedi: 8255_pci: initialize MITE data window
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
staging-comedi-8255_pci-initialize-mite-data-window.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 268d1e799663b795cba15c64f5d29407786a9dd4 Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@xxxxxxxxx>
Date: Thu, 13 Mar 2014 15:30:39 +0000
Subject: staging: comedi: 8255_pci: initialize MITE data window
From: Ian Abbott <abbotti@xxxxxxxxx>
commit 268d1e799663b795cba15c64f5d29407786a9dd4 upstream.
According to National Instruments' PCI-DIO-96/PXI-6508/PCI-6503 User
Manual, the physical address in PCI BAR1 needs to be OR'ed with 0x80 and
written to register offset 0xC0 in the "MITE" registers (BAR0). Do so
during initialization of the National Instruments boards handled by the
"8255_pci" driver. The boards were previously handled by the
"ni_pcidio" driver, where the initialization was done by `mite_setup()`
in the "mite" module. The "mite" module comes with too much extra
baggage for the "8255_pci" driver to deal with so use a local, simpler
initialization function.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/8255_pci.c | 34 ++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
--- a/drivers/staging/comedi/drivers/8255_pci.c
+++ b/drivers/staging/comedi/drivers/8255_pci.c
@@ -56,6 +56,7 @@ Configuration Options: not applicable, u
#include "../comedidev.h"
#include "8255.h"
+#include "mite.h"
enum pci_8255_boardid {
BOARD_ADLINK_PCI7224,
@@ -79,6 +80,7 @@ struct pci_8255_boardinfo {
const char *name;
int dio_badr;
int n_8255;
+ unsigned int has_mite:1;
};
static const struct pci_8255_boardinfo pci_8255_boards[] = {
@@ -126,36 +128,43 @@ static const struct pci_8255_boardinfo p
.name = "ni_pci-dio-96",
.dio_badr = 1,
.n_8255 = 4,
+ .has_mite = 1,
},
[BOARD_NI_PCIDIO96B] = {
.name = "ni_pci-dio-96b",
.dio_badr = 1,
.n_8255 = 4,
+ .has_mite = 1,
},
[BOARD_NI_PXI6508] = {
.name = "ni_pxi-6508",
.dio_badr = 1,
.n_8255 = 4,
+ .has_mite = 1,
},
[BOARD_NI_PCI6503] = {
.name = "ni_pci-6503",
.dio_badr = 1,
.n_8255 = 1,
+ .has_mite = 1,
},
[BOARD_NI_PCI6503B] = {
.name = "ni_pci-6503b",
.dio_badr = 1,
.n_8255 = 1,
+ .has_mite = 1,
},
[BOARD_NI_PCI6503X] = {
.name = "ni_pci-6503x",
.dio_badr = 1,
.n_8255 = 1,
+ .has_mite = 1,
},
[BOARD_NI_PXI_6503] = {
.name = "ni_pxi-6503",
.dio_badr = 1,
.n_8255 = 1,
+ .has_mite = 1,
},
};
@@ -163,6 +172,25 @@ struct pci_8255_private {
void __iomem *mmio_base;
};
+static int pci_8255_mite_init(struct pci_dev *pcidev)
+{
+ void __iomem *mite_base;
+ u32 main_phys_addr;
+
+ /* ioremap the MITE registers (BAR 0) temporarily */
+ mite_base = pci_ioremap_bar(pcidev, 0);
+ if (!mite_base)
+ return -ENOMEM;
+
+ /* set data window to main registers (BAR 1) */
+ main_phys_addr = pci_resource_start(pcidev, 1);
+ writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
+
+ /* finished with MITE registers */
+ iounmap(mite_base);
+ return 0;
+}
+
static int pci_8255_mmio(int dir, int port, int data, unsigned long iobase)
{
void __iomem *mmio_base = (void __iomem *)iobase;
@@ -201,6 +229,12 @@ static int pci_8255_auto_attach(struct c
if (ret)
return ret;
+ if (board->has_mite) {
+ ret = pci_8255_mite_init(pcidev);
+ if (ret)
+ return ret;
+ }
+
is_mmio = (pci_resource_flags(pcidev, board->dio_badr) &
IORESOURCE_MEM) != 0;
if (is_mmio) {
Patches currently in stable-queue which might be from abbotti@xxxxxxxxx are
queue-3.13/staging-comedi-8255_pci-initialize-mite-data-window.patch
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