media: ccs: Use V4L2 CCI for accessing sensor registers

Use V4L2 CCI for accessing device's registers. The 8-bit compatibility
read option is removed but this is supported by regmap through other
means.

Also the CCS register definitions are re-generated with V4L2 CCI
definitions. The older SMIA++ register definitions have been manually
converted.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: ccs: Better separate CCS static data access

Separate CCS static data read-only register access in ccs-reg-access.c by
naming them differently.

The code in this file generally deals with reading and writing registers
where as static data (when it comes to ccs_static_data_read_ro_reg())
contains the read-only register values but no hardware registers are
accessed in that case.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: ccs: Switch from standard integer types to kernel ones

The preferred integer types in the kernel are the Linux specific ones,
switch from standard C types to u32 and alike.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Add debug prints for MSR registers

Also print out MSR registers written to the sensor. This isn't entirely
optimal as the debug strings are produced even if they're not used but
that isn't really a grave issue --- the I²C bus is very slow anyway.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Print written register values

This helps debugging register writes.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Use static data read-only registers

Access read-only registers from CCS static data.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Add support for manufacturer regs from sensor and module files

Write manufacturer specific registers (MSRs) from file to the sensor on
sensor power-on.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Allow range in between I²C retries

Make the delay between I²C access retries a range between 1 and 2 ms. Also
make the number of retries 10 instead of 5, in order not to reduce the
total amount of time.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Change my e-mail address

Use my @linux.intel.com e-mail address in the CCS driver.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Read ireal numbers correctly

Some limit values are available in q16.q16 format, referred to as 32-bit
unsigned ireal in CCS. Read these correctly.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Make real to integer number conversion optional

The limit values will be raw soon, and the conversion takes place later
on. Prepare for that.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Refactor register reading a little

Rework quirk and 8-bit only access functions with a single function that
takes arguments. This is later extensible to support yet more flags.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: smiapp: Rename as "ccs"

Rename the "smiapp" driver as "ccs". MIPI CCS is the contemporary standard
for raw Bayer camera sensors. The driver retains support for the SMIA++
and SMIA compliant camera sensors. A module alias is added for old user
space using "smiapp" module name.

Add Intel copyright while at it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>