Re: [PATCH 4/5] termios: Use IMFS nodes for new Termios devices

2016-09-19 Thread Chris Johns

On 16/09/2016 22:23, Sebastian Huber wrote:

However, the device file system should go away in the future.


Please raise a ticket if one does not exist.

Thanks
Chris
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Re: [PATCH 4/5] termios: Use IMFS nodes for new Termios devices

2016-09-19 Thread Sebastian Huber

On 19/09/16 09:44, Chris Johns wrote:

On 16/09/2016 22:23, Sebastian Huber wrote:

However, the device file system should go away in the future.


Please raise a ticket if one does not exist.


I added one:

https://devel.rtems.org/ticket/2786

--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.

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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Sebastian Huber
Please note that this is the first Termios device driver that is 
independent of a BSP, CPU architecture and console driver. It is 
currently work in progress and lacks support for interrupts. We will add 
this probably in one or two weeks.


--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.

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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Gedare Bloom
It will be good to have some documentation (BSP/driver manual) about
how to write these kind of termios drivers. Usually without it we will
see someone just copy-paste this one and modify until they get it
right... So lacking a plain english doc, this "first" implementation
should provide enough comments to make it easy to copy-paste-modify.

On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
 wrote:
> Please note that this is the first Termios device driver that is independent
> of a BSP, CPU architecture and console driver. It is currently work in
> progress and lacks support for interrupts. We will add this probably in one
> or two weeks.
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail  : sebastian.hu...@embedded-brains.de
> PGP : Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
>
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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Sebastian Huber
Hello Joel,

- Joel Sherrill  schrieb:
> Sebastian,
> 
> This is yet another style of serial port driver in recent history and
> the software tax hasn't been paid on the last round of changes.

this is not a new style of serial port drivers.  It uses the new Termios device 
driver model which I changed in the last patch set to use IMFS generic nodes.  
This particular serial device (NXP SC16IS752) is attached via an I2C or SPI 
bus.  So, this is highly board/application specific.  Adding such a device to a 
particular BSP would end up in a configuration nightmare.

> Merging this will result in three different styles of serial port drivers
> by my count.
> 
> I am not opposed to improvement but this is rapidly heading
> down the "old vs new PowerPC interrupt" path and that sucked
> for years.

With the recent change for the new Termios device driver model its easier to 
move the existing console drivers, since there is no need to maintain 
major/minor numbers anymore.  The drawback is that you have to use IMFS as the 
base file system.  However, its just a matter of doing it to strip down the 
IMFS to have similar size demands than the current devfs.

> 
> --joel
> 
> 
> On Mon, Sep 19, 2016 at 8:57 AM, Gedare Bloom  wrote:
> 
> > It will be good to have some documentation (BSP/driver manual) about
> > how to write these kind of termios drivers. Usually without it we will
> > see someone just copy-paste this one and modify until they get it
> > right... So lacking a plain english doc, this "first" implementation
> > should provide enough comments to make it easy to copy-paste-modify.
> >
> > On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
> >  wrote:
> > > Please note that this is the first Termios device driver that is
> > independent
> > > of a BSP, CPU architecture and console driver. It is currently work in
> > > progress and lacks support for interrupts. We will add this probably in
> > one
> > > or two weeks.
> > >
> > > --
> > > Sebastian Huber, embedded brains GmbH
> > >
> > > Address : Dornierstr. 4, D-82178 Puchheim, Germany
> > > Phone   : +49 89 189 47 41-16
> > > Fax : +49 89 189 47 41-09
> > > E-Mail  : sebastian.hu...@embedded-brains.de
> > > PGP : Public key available on request.
> > >
> > > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
> > >
> > >
> > > ___
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> > devel@rtems.org
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> >

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Alan Cudmore
I applied this patch and tried building the raspberrypi BSP and got this error:
../../../../../../../rtems-src/rtems/c/src/../../cpukit/dev/serial/nxp-sc16is752.c:17:27:
 fatal error: bsp/atsam-spi.h: No such file or directory
 #include 

Will this only build for the atsam BSP?

I am interested in this driver. The Raspberry Pi only has one usable UART. I 
have a SC16IS750 device I would like to use to add a couple of UARTs to my 
board so I could connect a GPS and keep the original UART free. 

To use this, we will have to supply the new Linux user API SPI driver for the 
Raspberry Pi similar to the spi driver in the atsam BSP, correct? 

Thanks,
Alan


> On Sep 19, 2016, at 12:13 PM, Sebastian Huber 
>  wrote:
> 
> Hello Joel,
> 
> - Joel Sherrill  schrieb:
>> Sebastian,
>> 
>> This is yet another style of serial port driver in recent history and
>> the software tax hasn't been paid on the last round of changes.
> 
> this is not a new style of serial port drivers.  It uses the new Termios 
> device driver model which I changed in the last patch set to use IMFS generic 
> nodes.  This particular serial device (NXP SC16IS752) is attached via an I2C 
> or SPI bus.  So, this is highly board/application specific.  Adding such a 
> device to a particular BSP would end up in a configuration nightmare.
> 
>> Merging this will result in three different styles of serial port drivers
>> by my count.
>> 
>> I am not opposed to improvement but this is rapidly heading
>> down the "old vs new PowerPC interrupt" path and that sucked
>> for years.
> 
> With the recent change for the new Termios device driver model its easier to 
> move the existing console drivers, since there is no need to maintain 
> major/minor numbers anymore.  The drawback is that you have to use IMFS as 
> the base file system.  However, its just a matter of doing it to strip down 
> the IMFS to have similar size demands than the current devfs.
> 
>> 
>> --joel
>> 
>> 
>> On Mon, Sep 19, 2016 at 8:57 AM, Gedare Bloom  wrote:
>> 
>>> It will be good to have some documentation (BSP/driver manual) about
>>> how to write these kind of termios drivers. Usually without it we will
>>> see someone just copy-paste this one and modify until they get it
>>> right... So lacking a plain english doc, this "first" implementation
>>> should provide enough comments to make it easy to copy-paste-modify.
>>> 
>>> On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
>>>  wrote:
 Please note that this is the first Termios device driver that is
>>> independent
 of a BSP, CPU architecture and console driver. It is currently work in
 progress and lacks support for interrupts. We will add this probably in
>>> one
 or two weeks.
 
 --
 Sebastian Huber, embedded brains GmbH
 
 Address : Dornierstr. 4, D-82178 Puchheim, Germany
 Phone   : +49 89 189 47 41-16
 Fax : +49 89 189 47 41-09
 E-Mail  : sebastian.hu...@embedded-brains.de
 PGP : Public key available on request.
 
 Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
 
 
 ___
 devel mailing list
 devel@rtems.org
 http://lists.rtems.org/mailman/listinfo/devel
>>> ___
>>> devel mailing list
>>> devel@rtems.org
>>> http://lists.rtems.org/mailman/listinfo/devel
>>> 
> 
> -- 
> Sebastian Huber, embedded brains GmbH
> 
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
> PGP : Public key available on request.
> 
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
> ___
> devel mailing list
> devel@rtems.org
> http://lists.rtems.org/mailman/listinfo/devel

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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Sebastian Huber
Sorry, this is a bug in the driver.  We will fix this before we commit it.

- Am 19. Sep 2016 um 20:53 schrieb Alan Cudmore alan.cudm...@gmail.com:

> I applied this patch and tried building the raspberrypi BSP and got this 
> error:
> ../../../../../../../rtems-src/rtems/c/src/../../cpukit/dev/serial/nxp-sc16is752.c:17:27:
> fatal error: bsp/atsam-spi.h: No such file or directory
> #include 
> 
> Will this only build for the atsam BSP?
> 
> I am interested in this driver. The Raspberry Pi only has one usable UART. I
> have a SC16IS750 device I would like to use to add a couple of UARTs to my
> board so I could connect a GPS and keep the original UART free.
> 
> To use this, we will have to supply the new Linux user API SPI driver for the
> Raspberry Pi similar to the spi driver in the atsam BSP, correct?
> 
> Thanks,
> Alan
> 
> 
>> On Sep 19, 2016, at 12:13 PM, Sebastian Huber
>>  wrote:
>> 
>> Hello Joel,
>> 
>> - Joel Sherrill  schrieb:
>>> Sebastian,
>>> 
>>> This is yet another style of serial port driver in recent history and
>>> the software tax hasn't been paid on the last round of changes.
>> 
>> this is not a new style of serial port drivers.  It uses the new Termios 
>> device
>> driver model which I changed in the last patch set to use IMFS generic nodes.
>> This particular serial device (NXP SC16IS752) is attached via an I2C or SPI
>> bus.  So, this is highly board/application specific.  Adding such a device 
>> to a
>> particular BSP would end up in a configuration nightmare.
>> 
>>> Merging this will result in three different styles of serial port drivers
>>> by my count.
>>> 
>>> I am not opposed to improvement but this is rapidly heading
>>> down the "old vs new PowerPC interrupt" path and that sucked
>>> for years.
>> 
>> With the recent change for the new Termios device driver model its easier to
>> move the existing console drivers, since there is no need to maintain
>> major/minor numbers anymore.  The drawback is that you have to use IMFS as 
>> the
>> base file system.  However, its just a matter of doing it to strip down the
>> IMFS to have similar size demands than the current devfs.
>> 
>>> 
>>> --joel
>>> 
>>> 
>>> On Mon, Sep 19, 2016 at 8:57 AM, Gedare Bloom  wrote:
>>> 
 It will be good to have some documentation (BSP/driver manual) about
 how to write these kind of termios drivers. Usually without it we will
 see someone just copy-paste this one and modify until they get it
 right... So lacking a plain english doc, this "first" implementation
 should provide enough comments to make it easy to copy-paste-modify.
 
 On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
  wrote:
> Please note that this is the first Termios device driver that is
 independent
> of a BSP, CPU architecture and console driver. It is currently work in
> progress and lacks support for interrupts. We will add this probably in
 one
> or two weeks.
> 
> --
> Sebastian Huber, embedded brains GmbH
> 
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail  : sebastian.hu...@embedded-brains.de
> PGP : Public key available on request.
> 
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
> 
> 
> ___
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> devel@rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
 ___
 devel mailing list
 devel@rtems.org
 http://lists.rtems.org/mailman/listinfo/devel
 
>> 
>> --
>> Sebastian Huber, embedded brains GmbH
>> 
>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>> Phone   : +49 89 189 47 41-16
>> Fax : +49 89 189 47 41-09
>> E-Mail  : sebastian.huber at embedded-brains.de
>> PGP : Public key available on request.
>> 
>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>> ___
>> devel mailing list
>> devel@rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Alan Cudmore
Thanks.. No hurry, I need to implement the new SPI api for the Pi anyway,

Alan

> On Sep 19, 2016, at 2:56 PM, Sebastian Huber 
>  wrote:
> 
> Sorry, this is a bug in the driver.  We will fix this before we commit it.
> 
> - Am 19. Sep 2016 um 20:53 schrieb Alan Cudmore alan.cudm...@gmail.com:
> 
>> I applied this patch and tried building the raspberrypi BSP and got this 
>> error:
>> ../../../../../../../rtems-src/rtems/c/src/../../cpukit/dev/serial/nxp-sc16is752.c:17:27:
>> fatal error: bsp/atsam-spi.h: No such file or directory
>> #include 
>> 
>> Will this only build for the atsam BSP?
>> 
>> I am interested in this driver. The Raspberry Pi only has one usable UART. I
>> have a SC16IS750 device I would like to use to add a couple of UARTs to my
>> board so I could connect a GPS and keep the original UART free.
>> 
>> To use this, we will have to supply the new Linux user API SPI driver for the
>> Raspberry Pi similar to the spi driver in the atsam BSP, correct?
>> 
>> Thanks,
>> Alan
>> 
>> 
>>> On Sep 19, 2016, at 12:13 PM, Sebastian Huber
>>>  wrote:
>>> 
>>> Hello Joel,
>>> 
>>> - Joel Sherrill  schrieb:
 Sebastian,
 
 This is yet another style of serial port driver in recent history and
 the software tax hasn't been paid on the last round of changes.
>>> 
>>> this is not a new style of serial port drivers.  It uses the new Termios 
>>> device
>>> driver model which I changed in the last patch set to use IMFS generic 
>>> nodes.
>>> This particular serial device (NXP SC16IS752) is attached via an I2C or SPI
>>> bus.  So, this is highly board/application specific.  Adding such a device 
>>> to a
>>> particular BSP would end up in a configuration nightmare.
>>> 
 Merging this will result in three different styles of serial port drivers
 by my count.
 
 I am not opposed to improvement but this is rapidly heading
 down the "old vs new PowerPC interrupt" path and that sucked
 for years.
>>> 
>>> With the recent change for the new Termios device driver model its easier to
>>> move the existing console drivers, since there is no need to maintain
>>> major/minor numbers anymore.  The drawback is that you have to use IMFS as 
>>> the
>>> base file system.  However, its just a matter of doing it to strip down the
>>> IMFS to have similar size demands than the current devfs.
>>> 
 
 --joel
 
 
 On Mon, Sep 19, 2016 at 8:57 AM, Gedare Bloom  wrote:
 
> It will be good to have some documentation (BSP/driver manual) about
> how to write these kind of termios drivers. Usually without it we will
> see someone just copy-paste this one and modify until they get it
> right... So lacking a plain english doc, this "first" implementation
> should provide enough comments to make it easy to copy-paste-modify.
> 
> On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
>  wrote:
>> Please note that this is the first Termios device driver that is
> independent
>> of a BSP, CPU architecture and console driver. It is currently work in
>> progress and lacks support for interrupts. We will add this probably in
> one
>> or two weeks.
>> 
>> --
>> Sebastian Huber, embedded brains GmbH
>> 
>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>> Phone   : +49 89 189 47 41-16
>> Fax : +49 89 189 47 41-09
>> E-Mail  : sebastian.hu...@embedded-brains.de
>> PGP : Public key available on request.
>> 
>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>> 
>> 
>> ___
>> devel mailing list
>> devel@rtems.org
>> http://lists.rtems.org/mailman/listinfo/devel
> ___
> devel mailing list
> devel@rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
> 
>>> 
>>> --
>>> Sebastian Huber, embedded brains GmbH
>>> 
>>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>>> Phone   : +49 89 189 47 41-16
>>> Fax : +49 89 189 47 41-09
>>> E-Mail  : sebastian.huber at embedded-brains.de
>>> PGP : Public key available on request.
>>> 
>>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>>> ___
>>> devel mailing list
>>> devel@rtems.org
>>> http://lists.rtems.org/mailman/listinfo/devel

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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Sebastian Huber

Ok, it will be probably next week, since Alex is on holiday.

For an example SPI driver see

https://git.rtems.org/rtems/tree/c/src/lib/libbsp/arm/atsam/spi/atsam_spi_bus.c

The main part of the driver is the bus transfer handler, e.g.

|static int atsam_spi_transfer( spi_bus *base, const spi_ioc_transfer 
*msgs, uint32_t msg_count ) { int rv; atsam_spi_bus *bus = 
(atsam_spi_bus *)base; if (msg_count == 0) { return 0; } bus->msgs = 
&msgs[0]; bus->msg_todo = msg_count; bus->task_id = rtems_task_self(); 
rv = atsam_spi_setup_transfer(bus); return rv; }|



On 19/09/16 21:29, Alan Cudmore wrote:

Thanks.. No hurry, I need to implement the new SPI api for the Pi anyway,

Alan


On Sep 19, 2016, at 2:56 PM, Sebastian Huber 
 wrote:

Sorry, this is a bug in the driver.  We will fix this before we commit it.

- Am 19. Sep 2016 um 20:53 schrieb Alan Cudmore alan.cudm...@gmail.com:


I applied this patch and tried building the raspberrypi BSP and got this error:
../../../../../../../rtems-src/rtems/c/src/../../cpukit/dev/serial/nxp-sc16is752.c:17:27:
fatal error: bsp/atsam-spi.h: No such file or directory
#include 

Will this only build for the atsam BSP?

I am interested in this driver. The Raspberry Pi only has one usable UART. I
have a SC16IS750 device I would like to use to add a couple of UARTs to my
board so I could connect a GPS and keep the original UART free.

To use this, we will have to supply the new Linux user API SPI driver for the
Raspberry Pi similar to the spi driver in the atsam BSP, correct?

Thanks,
Alan



On Sep 19, 2016, at 12:13 PM, Sebastian Huber
 wrote:

Hello Joel,

- Joel Sherrill  schrieb:

Sebastian,

This is yet another style of serial port driver in recent history and
the software tax hasn't been paid on the last round of changes.

this is not a new style of serial port drivers.  It uses the new Termios device
driver model which I changed in the last patch set to use IMFS generic nodes.
This particular serial device (NXP SC16IS752) is attached via an I2C or SPI
bus.  So, this is highly board/application specific.  Adding such a device to a
particular BSP would end up in a configuration nightmare.


Merging this will result in three different styles of serial port drivers
by my count.

I am not opposed to improvement but this is rapidly heading
down the "old vs new PowerPC interrupt" path and that sucked
for years.

With the recent change for the new Termios device driver model its easier to
move the existing console drivers, since there is no need to maintain
major/minor numbers anymore.  The drawback is that you have to use IMFS as the
base file system.  However, its just a matter of doing it to strip down the
IMFS to have similar size demands than the current devfs.


--joel


On Mon, Sep 19, 2016 at 8:57 AM, Gedare Bloom  wrote:


It will be good to have some documentation (BSP/driver manual) about
how to write these kind of termios drivers. Usually without it we will
see someone just copy-paste this one and modify until they get it
right... So lacking a plain english doc, this "first" implementation
should provide enough comments to make it easy to copy-paste-modify.

On Mon, Sep 19, 2016 at 4:11 AM, Sebastian Huber
 wrote:

Please note that this is the first Termios device driver that is

independent

of a BSP, CPU architecture and console driver. It is currently work in
progress and lacks support for interrupts. We will add this probably in

one

or two weeks.

--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.


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--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail  : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.

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Re: [PATCH] cpukit: Add nxp-sc16is752 serial device driver

2016-09-19 Thread Chris Johns

On 20/09/2016 02:13, Sebastian Huber wrote:


With the recent change for the new Termios device driver model its easier to 
move the existing console drivers, since there is no need to maintain 
major/minor numbers anymore.  The drawback is that you have to use IMFS as the 
base file system.  However, its just a matter of doing it to strip down the 
IMFS to have similar size demands than the current devfs.



Is there a guide or something we can use to see how to do this? If 
something existed that gives some hints, issues etc I am sure it would help.


Thanks
Chris
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