On 5/10/17 8:58 PM, Jeremy Kerr wrote:
Hi Chris,
I don't think we'd want this per master. The lock is for the 'top'
master issuing commands. Only the top master can initiate any
transactions on the bus to any devices connected downstream. Downstream
masters such as hub masters, etc... cann
From: Jeremy Kerr
Add a `struct fsi_master` to represent a FSI master controller.
FSI master drivers register one of these structs to provide
device-specific of the standard operations: read/write/term/break and
link control.
Includes changes from Edward A. James & Jeremy Kerr
.
Signed-off-by
n request.
- Assign value of master->master.dev at probe time.
- Use get_optional interface for all optional GPIO pins.
Christopher Bostic (9):
drivers/fsi: Document FSI master sysfs files in ABI
drivers/fsi: Set up links for slave communication
drivers/fsi: Set slave SMODE to in
Set CFAM to appropriate ID so that the controlling master can manage
link memory ranges. Add slave engine register definitions.
Includes changes from Jeremy Kerr .
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 75
From: Jeremy Kerr
When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris
Enable each link and send a break command, and try to detect a slave by
reading from the SMODE register.
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 37 +++--
1 file changed, 35 insertions(+), 2 deletions(-)
diff
From: Jeremy Kerr
Introduce functions to perform reads/writes on the slave address space;
these simply pass the request on the slave's master with the correct
link and slave ID.
We implement these on top of similar helpers for the master.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Kerr
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
v7 - Move global spinlock to struct fsi_master_gpio
- Remove redundant checks for valid gpio descriptors
- Clarify 'active low' comments
- More descriptive comments for build_abs_ar_command()
- Test MTOE
From: Jeremy Kerr
Allow drivers to access the slave address ranges.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Christopher Bostic
---
drivers/fsi/fsi-core.c | 26 --
include/linux/fsi.h| 12
2 files changed, 32 insertions
Add an engine driver to expose a "hub" FSI master - which has a set of
control registers in the engine address space, and uses a chunk of the
slave address space for actual FSI communication.
Additional changes from Jeremy Kerr .
Signed-off-by: Christopher Bostic
Signed-off-by: J
From: Jeremy Kerr
For slaves that are behind a software-clocked master, we want FSI CFAMs
to run asynchronously to the FSI clock, so set up our slaves to be in
async mode.
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
---
drivers/fsi/fsi-core.c| 22
From: Jeremy Kerr
Trace low level input/output GPIO operations.
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
---
drivers/fsi/fsi-master-gpio.c | 9 +
include/trace/events/fsi_master_gpio.h | 68 ++
2 files changed, 77 insertions
From: Jeremy Kerr
This change implements error handling in the FSI core, by cleaning up
and retrying failed operations, using the SISC, TERM and BREAK
facilities.
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
---
drivers/fsi/fsi-core.c | 121
Create a simple SCOM engine device driver that reads and writes
its control registers via an FSI bus.
Includes changes from Edward A. James .
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
---
drivers/fsi/Kconfig
From: Chris Bostic
Add info for sysfs scan file in Documentaiton ABI/testing
Signed-off-by: Christopher Bostic
---
v7 - Rename scan file to 'rescan'
- Add 'raw' file details
- Add 'term' file details
- Add 'break' file details
- Upd
Add fsi master gpio device tree binding documentation.
Includes changes from Jeremy Kerr .
Signed-off-by: Christopher Bostic
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Acked-by: Rob Herring
---
.../devicetree/bindings/fsi/fsi-master-gpio.txt| 24 ++
1
From: Jeremy Kerr
Trace low level read and write FSI bus operations.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Christopher Bostic
---
drivers/fsi/fsi-core.c | 27 +++---
include/trace/events/fsi.h | 127 +
2
From: Jeremy Kerr
Implement fsi_slave_init: if we can read a chip ID, create fsi_slave
devices and register with the driver core.
Includes changes from Christopher Bostic .
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
v7 - Change warning
Add driver_register and driver_unregister wrappers for FSI.
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 17 +
include/linux/fsi.h| 12
2 files changed, 29 insertions(+)
diff --git a/drivers/fsi/fsi-core.c b
From: Jeremy Kerr
This change adds a 'raw' file for reads & writes, and a 'term' file for
the TERM command, and a 'break' file for issuing a BREAK.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Christopher Bostic
Allow a master to undo a previous scan. Should a master scan a bus
twice it will need to ensure it doesn't double register any
previously detected device.
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
v7 - Unscan when unregistering master
- Remove leading '
From: Jeremy Kerr
This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.
Includes contributions from Christopher Bostic
and Edward A. James .
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
Signed-off-by: Christ
From: Jeremy Kerr
Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.
Includes contributions from Christopher Bostic
.
Signed-off-by: Jeremy Kerr
Signed-off-by: Christopher Bostic
Signed-off-by: Joel Stanley
---
v7 - Use GEN_MASK for bitmask
From: Jeremy Kerr
Add a little helper for crc4 calculations. This works 4-bits-at-a-time,
using a simple table approach.
We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
From: Jeremy Kerr
Add the initial fsi slave device, which is private to the core code.
This will be a child of the master, and parent to endpoint devices.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 10 ++
1 file cha
On Tue, Jan 17, 2017 at 1:42 AM, Greg KH wrote:
> On Mon, Jan 16, 2017 at 03:22:48PM -0600, christopher.lee.bos...@gmail.com
> wrote:
>> From: Chris Bostic
>
>
>
> Only this, and patch 02/18 came through, did something get stuck on your
> end?
>
Hi Greg,
Yes had an issue with the server block
On Fri, Jan 13, 2017 at 1:15 AM, Greg KH wrote:
> On Thu, Jan 12, 2017 at 04:37:35PM -0600, christopher.lee.bos...@gmail.com
> wrote:
>> From: Chris Bostic
>>
>> Signed-off-by: Chris Bostic
>
> I can not accept patches that have no changelog text, and this one is
> very odd:
>
>> ---
>> driver
From: Jeremy Kerr
This change adds the initial (empty) fsi bus definition, and introduces
drivers/fsi/.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/Kconfig| 2 ++
drivers/Makefile | 1 +
drivers/fsi/Kconfig| 12
drivers/fsi/Makefile |
From: Jeremy Kerr
Add some helpers for the crc checks for the slave configuration table.
This works 4-bits-at-a-time, using a simple table approach.
We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.
Signed-off-by: Jeremy Kerr
From: Jeremy Kerr
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 28
drivers/fsi/fsi-master.h | 37 +
2 files changed, 65 insertions(+)
create mode 100644 drivers/fsi/fsi-master.h
diff --g
From: Jeremy Kerr
When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris
From: Jeremy Kerr
Driver bind to devices based on the engine types & (optional) versions.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 21 +
include/linux/fsi.h| 21 +++--
2 files changed, 40 insertions(+), 2 delet
From: Jeremy Kerr
Add the initial fsi slave device, which is private to the core code.
This will be a child of the master, and parent to endpoint devices.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 9 +
1 file changed, 9 insertions(+)
diff --g
From: Jeremy Kerr
Create fsi_slave devices during the master scan.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 56 --
1 file changed, 54 insertions(+), 2 deletions(-)
diff --git a/drivers/fsi/fsi-core.c b
From: Jeremy Kerr
This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.
Includes contributions from Chris Bostic
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 47 +++
From: Chris Bostic
Move master scan from automatic kick off early in kernel power up
to a scan file that can be invoked at any particular time based
on needs of a given platform.
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 15 +--
1 file changed, 13 insertions(+), 2 de
From: Chris Bostic
Set CFAM to appropriate ID so that the controlling master
can manage link memory ranges. Add slave engine register
definitions.
Signed-off-by: Chris Bostic
Signed-off-by: Jeremy Kerr
---
drivers/fsi/fsi-core.c | 90 +-
1 file
Introduction of the IBM 'Flexible Support Interface' (FSI) bus device
driver. FSI is a high fan out serial bus consisting of a clock and a serial
data line capable of running at speeds up to 166 MHz.
This set provides the basic framework to add FSI extensions to the
Linux bus and device models. Ma
From: Chris Bostic
Enable each link and send a break command in preparation
for scanning each link for slaves.
Signed-off-by: Chris Bostic
Signed-off-by: Jeremy Kerr
---
drivers/fsi/fsi-core.c | 38 --
drivers/fsi/fsi-master.h | 2 ++
2 files changed, 38
From: Chris Bostic
Add info for sysfs scan file in Documentaiton ABI/testing
Signed-off-by: Chris Bostic
---
Documentation/ABI/testing/sysfs-bus-fsi | 6 ++
1 file changed, 6 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-fsi
diff --git a/Documentation/ABI/testing/s
From: Chris Bostic
Define the device tree bindings for the GPIO master type.
Signed-off-by: Chris Bostic
---
.../devicetree/bindings/fsi/fsi-master-gpio.txt| 71 ++
1 file changed, 71 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fsi/fsi-master-gpi
From: Chris Bostic
Master will remove all previously scanned devices during an
unregister operation. This will be necessary should any master
attempt to register more than once.
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 14 ++
1 file changed, 14 insertions(+)
diff -
From: Chris Bostic
Implement a FSI master using GPIO. Will generate FSI protocol for
read and write commands to particular addresses. Sends master command
and waits for and decodes a slave response.
Includes Jeremy Kerr's original GPIO master base commit.
Signed-off-by: Jeremy Kerr
Signed-of
From: Chris Bostic
Add details on the basic functions of the FSI serial bus.
Signed-off-by: Chris Bostic
---
Documentation/devicetree/bindings/fsi/fsi.txt | 54 +++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fsi/fsi.txt
diff
From: Jeremy Kerr
Add structs for fsi devices & drivers, and struct device conversion
functions.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
include/linux/fsi.h | 11 +++
1 file changed, 11 insertions(+)
diff --git a/include/linux/fsi.h b/include/linux/fsi.h
index 47aa
From: Jeremy Kerr
Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.
Includes contributions from Chris Bostic
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 136 +++--
Introduction of the IBM 'Flexible Support Interface' (FSI) bus device
driver. FSI is a high fan out serial bus consisting of a clock and a serial
data line capable of running at speeds up to 166 MHz.
This set provides the basic framework to add FSI extensions to the
Linux bus and device models. Ma
On Wed, Jan 18, 2017 at 8:11 PM, Jeremy Kerr wrote:
> Hi Chris,
>
> From this:
>
>>> +
>>> +The standard FSI master node
>>> +
>>> +This node describes a FSI master implmemented fully in hardware
>>> +with dedicated input/output pins required for its function (i.e.
>>>
On Wed, Jan 18, 2017 at 3:57 PM, Rob Herring wrote:
> On Thu, Jan 12, 2017 at 04:35:43PM -0600, christopher.lee.bos...@gmail.com
> wrote:
>> From: Chris Bostic
>>
>> Define the device tree bindings for the GPIO master type.
>>
>> Signed-off-by: Chris Bostic
>>
>> ---
>>
>> V2 - Break out this d
On Thu, Dec 8, 2016 at 10:12 PM, Jeremy Kerr wrote:
> Hi Chris,
>
>> +static ssize_t store_scan(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf,
>> + size_t count)
>> +{
>> + struct
On Wed, Dec 7, 2016 at 5:33 PM, Jeremy Kerr wrote:
> Hi Greg,
>
>> Why not just create lib/crc4.c with these functions, like the other crc
>> functions in the kernel?
>
> Two (bad) reasons:
>
> - The crc4 implementation here is pretty specific to the FSI
>usage (only supporting 4-bit-sized ch
On Wed, Dec 7, 2016 at 3:06 AM, Greg KH wrote:
> On Tue, Dec 06, 2016 at 08:09:30PM -0600, Chris Bostic wrote:
>> From: Jeremy Kerr
>>
>> Signed-off-by: Jeremy Kerr
>> Signed-off-by: Chris Bostic
>> ---
>> drivers/fsi/fsi-core.c | 20
>> drivers/fsi/fsi-master.h | 37 +++
From: Chris Bostic
Add driver_register and driver_unregister wrappers for FSI.
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 17 +
include/linux/fsi.h| 12
2 files changed, 29 insertions(+)
diff --git a/drivers/fsi/fsi-c
From: Jeremy Kerr
Allow drivers to access the slave address ranges.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 26 --
include/linux/fsi.h| 12
2 files changed, 32 insertions(+), 6 de
Implementation of the IBM 'Flexible Support Interface' (FSI) bus device
driver. FSI is a high fan out serial bus consisting of a clock and a serial
data line capable of running at speeds up to 166 MHz.
This set provides the basic framework to add FSI extensions to the
Linux bus and device models.
From: Jeremy Kerr
Introduce functions to perform reads/writes on the slave address space;
these simply pass the request on the slave's master with the correct
link and slave ID.
We implement these on top of similar helpers for the master.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
From: Jeremy Kerr
Add trace points for key GPIO operations of the GPIO based FSI
master.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-master-gpio.c | 9 +
include/trace/events/fsi_master_gpio.h | 68 ++
2 files change
From: Jeremy Kerr
For slaves that are behind a software-clocked master, we want FSI CFAMs
to run asynchronously to the FSI clock, so set up our slaves to be in
async mode.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c| 22 +-
dri
From: Chris Bostic
Add an engine driver to expose a "hub" FSI master - which has a set of
control registers in the engine address space, and uses a chunk of the
slave address space for actual FSI communication.
Additional changes from Jeremy Kerr .
Signed-off-by: Chris Bostic
Signed-off-by: Je
From: Chris Bostic
Create a simple SCOM engine device driver that reads and writes
its control registers via an FSI bus.
Includes changes from Edward A. James .
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
---
drivers/fsi
From: Chris Bostic
Add info for sysfs scan file in Documentaiton ABI/testing
Signed-off-by: Chris Bostic
---
Documentation/ABI/testing/sysfs-bus-fsi | 6 ++
1 file changed, 6 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-fsi
diff --git a/Documentation/ABI/testing/s
From: Chris Bostic
Implement a FSI master using GPIO. Will generate FSI protocol for
read and write commands to particular addresses. Sends master command
and waits for and decodes a slave response.
Includes changes from Edward A. James and Jeremy
Kerr .
Signed-off-by: Edward A. James
Signe
From: Jeremy Kerr
This change implements error handling in the FSI core, by cleaning up
and retrying failed operations, using the SISC, TERM and BREAK
facilities.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 121 ++
From: Jeremy Kerr
This change adds a 'raw' file for reads & writes, and a 'term' file for
the TERM command, and a 'break' file for issuing a BREAK.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 116
From: Chris Bostic
Add fsi master gpio device tree binding documentation
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
.../devicetree/bindings/fsi/fsi-master-gpio.txt| 24 ++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bi
From: Jeremy Kerr
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 27 +++---
include/trace/events/fsi.h | 127 +
2 files changed, 148 insertions(+), 6 deletions(-)
create mode
From: Chris Bostic
Allow a master to undo a previous scan. Should a master scan a bus
twice it will need to ensure it doesn't double register any
previously detected device.
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 40 ++
From: Jeremy Kerr
Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.
Includes contributions from Chris Bostic
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 127
From: Jeremy Kerr
Implement fsi_slave_init: if we can read a chip ID, create fsi_slave
devices and register with the driver core.
Includes changes from Chris Bostic .
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 66 +
From: Chris Bostic
Enable each link and send a break command, and try to detect a slave by
reading from the SMODE register.
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 37 +++--
1 file changed, 35 insertions(+), 2 deleti
From: Jeremy Kerr
This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.
Includes contributions from Chris Bostic
and Edward A. James .
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off
From: Chris Bostic
Set CFAM to appropriate ID so that the controlling master can manage
link memory ranges. Add slave engine register definitions.
Includes changes from Jeremy Kerr .
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core
From: Jeremy Kerr
This change adds a 'raw' file for reads & writes, and a 'term' file for
the TERM command, and a 'break' file for issuing a BREAK.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 116
From: Jeremy Kerr
Add some helpers for the crc checks for the slave configuration table.
This works 4-bits-at-a-time, using a simple table approach.
We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.
We add this to the fsi code
From: Jeremy Kerr
Add a `struct fsi_master` to represent a FSI master controller.
FSI master drivers register one of these structs to provide
device-specific of the standard operations: read/write/term/break and
link control.
Includes changes from Edward A. James & Jeremy Kerr
.
Signed-off-by
From: Jeremy Kerr
When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris
From: Jeremy Kerr
Add the initial fsi slave device, which is private to the core code.
This will be a child of the master, and parent to endpoint devices.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 10 ++
1 file cha
On 3/30/17 3:50 PM, Benjamin Herrenschmidt wrote:
On Thu, 2017-03-30 at 13:15 -0500, Christopher Bostic wrote:
+static void serial_in(struct fsi_master_gpio *master, struct fsi_gpio_msg *msg,
+ uint8_t num_bits)
+{
+ uint8_t bit, in_bit;
+
+ set_sda_input
v4.11-rc4 next-20170330]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
https://github.com/0day-ci/linux/commits/Christopher-Bostic/FSI-device-driver-implementation/20170330-184914
:: branch date: 5 hours ago
:: commit date: 5 hour
On 4/4/17 5:19 PM, Benjamin Herrenschmidt wrote:
On Tue, 2017-04-04 at 12:32 -0500, Christopher Bostic wrote:
Agreed that there is room for improvement. I intend to look further
into your suggestions from here and our private conversation on the
matter and make changes as appropriate. I
From: Jeremy Kerr
Add a `struct fsi_master` to represent a FSI master controller.
FSI master drivers register one of these structs to provide
device-specific of the standard operations: read/write/term/break and
link control.
Includes changes from Edward A. James & Jeremy Kerr
.
Signed-off-by
Implementation of the IBM 'Flexible Support Interface' (FSI) bus device
driver. FSI is a high fan out serial bus consisting of a clock and a serial
data line capable of running at speeds up to 166 MHz.
This set provides the basic framework to add FSI extensions to the
Linux bus and device models.
From: Jeremy Kerr
When a new fsi master is added, we will need to scan its links, and
slaves attached to those links. This change introduces a little shell to
iterate the links, which we will populate with the actual slave scan in
a later change.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris
From: Jeremy Kerr
Introduce functions to perform reads/writes on the slave address space;
these simply pass the request on the slave's master with the correct
link and slave ID.
We implement these on top of similar helpers for the master.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
From: Jeremy Kerr
Add some helpers for the crc checks for the slave configuration table.
This works 4-bits-at-a-time, using a simple table approach.
We will need this in the FSI core code, as well as any master
implementations that need to calculate CRCs in software.
We add this to the fsi code
From: Jeremy Kerr
Add the initial fsi slave device, which is private to the core code.
This will be a child of the master, and parent to endpoint devices.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 10 ++
1 file cha
From: Jeremy Kerr
Now that we have fsi_slave devices, scan each for endpoints, and
register them on the fsi bus.
Includes contributions from Chris Bostic
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 127
From: Jeremy Kerr
Implement fsi_slave_init: if we can read a chip ID, create fsi_slave
devices and register with the driver core.
Includes changes from Chris Bostic .
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 66 +
From: Chris Bostic
Enable each link and send a break command, and try to detect a slave by
reading from the SMODE register.
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 37 +++--
1 file changed, 35 insertions(+), 2 deleti
From: Chris Bostic
Set CFAM to appropriate ID so that the controlling master can manage
link memory ranges. Add slave engine register definitions.
Includes changes from Jeremy Kerr .
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core
From: Jeremy Kerr
This change introduces the fsi device API: simple read, write and peek
accessors for the devices' address spaces.
Includes contributions from Chris Bostic
and Edward A. James .
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
Signed-off
From: Chris Bostic
Add fsi master gpio device tree binding documentation
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
Acked-by: Rob Herring
---
.../devicetree/bindings/fsi/fsi-master-gpio.txt| 24 ++
1 file changed, 24 insertions(+)
create mode 100644 Docu
From: Chris Bostic
Add driver_register and driver_unregister wrappers for FSI.
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
---
drivers/fsi/fsi-core.c | 17 +
include/linux/fsi.h| 12
2 files changed, 29 insertions(+)
diff --git a/drivers/fsi/fsi-c
From: Jeremy Kerr
This change adds a 'raw' file for reads & writes, and a 'term' file for
the TERM command, and a 'break' file for issuing a BREAK.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 116
From: Jeremy Kerr
Allow drivers to access the slave address ranges.
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 26 --
include/linux/fsi.h| 12
2 files changed, 32 insertions(+), 6 de
From: Jeremy Kerr
Signed-off-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 27 +++---
include/trace/events/fsi.h | 127 +
2 files changed, 148 insertions(+), 6 deletions(-)
create mode
From: Jeremy Kerr
This change implements error handling in the FSI core, by cleaning up
and retrying failed operations, using the SISC, TERM and BREAK
facilities.
Signed-off-by: Jeremy Kerr
Signed-off-by: Chris Bostic
---
drivers/fsi/fsi-core.c | 121 ++
From: Chris Bostic
Add info for sysfs scan file in Documentaiton ABI/testing
Signed-off-by: Chris Bostic
---
Documentation/ABI/testing/sysfs-bus-fsi | 6 ++
1 file changed, 6 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-fsi
diff --git a/Documentation/ABI/testing/s
From: Chris Bostic
Create a simple SCOM engine device driver that reads and writes
its control registers via an FSI bus.
Includes changes from Edward A. James .
Signed-off-by: Chris Bostic
Signed-off-by: Joel Stanley
Signed-off-by: Edward A. James
Signed-off-by: Jeremy Kerr
---
drivers/fsi
From: Chris Bostic
Implement a FSI master using GPIO. Will generate FSI protocol for
read and write commands to particular addresses. Sends master command
and waits for and decodes a slave response.
Includes changes from Edward A. James and Jeremy
Kerr .
Signed-off-by: Edward A. James
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