On Fri, Feb 28, 2014 at 04:45:43PM -0800, Greg KH wrote:
> On Fri, Feb 28, 2014 at 03:57:19PM -0800, Ira W. Snyder wrote:
> > Commit 7808edcd306f22aeb23775d34e70b7fa2f58b852 "Basic support for
> > Moschip 9900 family I/O chips" broke support for the 98xx boards. This
> > is due to a missing check for the 99xx family inside the newly added
> > pci_netmos_9900_setup() function, which is now used for all boards in
> > the Moschip family.
> >
> > The code for skipping BARs is incorrect for the 98xx boards. Using it
> > causes two serial ports to be left undetected on my 9865 board.
> >
> > By checking for the 99xx boards and using the new code exclusively for
> > them, all of my serial ports are now detected.
> >
> > Signed-off-by: Ira W. Snyder <iws@xxxxxxxxxxxxxxxx>
> > ---
> >
> > Here is the lspci output for my 9865 board. On the 05:00.2 device, the
> > middle two serial ports (I/O ports 0x1010 and 0x1008) are left unused
> > and undetected without this patch.
> >
> > After the patch, they work perfectly.
> >
> > 05:00.0 Serial controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller (prog-if 02 [16550])
> > Subsystem: Device a000:1000
> > Flags: bus master, fast Back2Back, medium devsel, latency 32, IRQ 21
> > I/O ports at 1028 [size=8]
> > Memory at e0104000 (32-bit, non-prefetchable) [size=4K]
> > Memory at e0103000 (32-bit, non-prefetchable) [size=4K]
> > Capabilities: <access denied>
> > Kernel driver in use: serial
> > Kernel modules: parport_pc
> >
> > 05:00.1 Serial controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller (prog-if 02 [16550])
> > Subsystem: Device a000:1000
> > Flags: bus master, fast Back2Back, medium devsel, latency 32, IRQ 22
> > I/O ports at 1020 [size=8]
> > Memory at e0102000 (32-bit, non-prefetchable) [size=4K]
> > Memory at e0101000 (32-bit, non-prefetchable) [size=4K]
> > Capabilities: <access denied>
> > Kernel driver in use: serial
> > Kernel modules: parport_pc
> >
> > 05:00.2 Communication controller: MosChip Semiconductor Technology Ltd. PCI 9865 Multi-I/O Controller
> > Subsystem: Device a000:3004
> > Flags: bus master, fast Back2Back, medium devsel, latency 32, IRQ 23
> > I/O ports at 1018 [size=8]
> > I/O ports at 1010 [size=8]
> > I/O ports at 1008 [size=8]
> > I/O ports at 1000 [size=8]
> > Memory at e0100000 (32-bit, non-prefetchable) [size=4K]
> > Capabilities: <access denied>
> > Kernel driver in use: serial
> >
> > drivers/tty/serial/8250/8250_pci.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
> > index 50228eed3b6f..374551f196c5 100644
> > --- a/drivers/tty/serial/8250/8250_pci.c
> > +++ b/drivers/tty/serial/8250/8250_pci.c
> > @@ -783,7 +783,8 @@ static int pci_netmos_9900_setup(struct serial_private *priv,
> > {
> > unsigned int bar;
> >
> > - if ((priv->dev->subsystem_device & 0xff00) == 0x3000) {
> > + if ((priv->dev->subsystem_device & 0xff00) == 0x3000 &&
> > + (priv->dev->device & 0xff00) == 0x9900) {
> > /* netmos apparently orders BARs by datasheet layout, so serial
> > * ports get BARs 0 and 3 (or 1 and 4 for memmapped)
> > */
>
> This patch doesn't apply at all due to a change to this statement in
> 3.14-rc3. Actually, is the patch even needed after commit
> 333c085e4b0cd9df04b087d29f87969a4e26dfa9 went into Linus's tree? If so,
> please refresh it against the latest tree so I can apply it.
>
> thanks,
>
> greg k-h
Hi Greg,
This patch is no longer needed. The commit you mention accomplishes the
same thing.
Thanks,
Ira
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