Commit ab47d5cd authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

media: smiapp: Calculate CCS limit offsets and limit buffer size 



Calculate the limit offsets and the size of the limit buffer. CCS limits
are read into this buffer, and the offsets are helpful in accessing the
information in it.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 82731a19

drivers/media/i2c/smiapp/Makefile

+1 −1
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0-only

smiapp-objs			+= smiapp-core.o smiapp-regs.o \

				   smiapp-quirk.o smiapp-limits.o

				   smiapp-quirk.o smiapp-limits.o ccs-limits.o

obj-$(CONFIG_VIDEO_SMIAPP)	+= smiapp.o



ccflags-y += -I $(srctree)/drivers/media/i2c

drivers/media/i2c/smiapp/smiapp-core.c

+39 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <media/v4l2-fwnode.h>

#include <media/v4l2-device.h>



#include "ccs-limits.h"

#include "smiapp.h"



#define SMIAPP_ALIGN_DIM(dim, flags)	\
@@ -34,6 +35,11 @@ 
	 ? ALIGN((dim), 2)		\

	 : (dim) & ~1)



static struct ccs_limit_offset {

	u16	lim;

	u16	info;

} ccs_limit_offsets[CCS_L_LAST + 1];



/*

 * smiapp_module_idents - supported camera modules

 */
@@ -3166,7 +3172,39 @@ static struct i2c_driver smiapp_i2c_driver = { 
	.id_table = smiapp_id_table,

};



module_i2c_driver(smiapp_i2c_driver);

static int smiapp_module_init(void)

{

	unsigned int i, l;



	for (i = 0, l = 0; ccs_limits[i].size && l < CCS_L_LAST; i++) {

		if (!(ccs_limits[i].flags & CCS_L_FL_SAME_REG)) {

			ccs_limit_offsets[l + 1].lim =

				ALIGN(ccs_limit_offsets[l].lim +

				      ccs_limits[i].size,

				      ccs_reg_width(ccs_limits[i + 1].reg));

			ccs_limit_offsets[l].info = i;

			l++;

		} else {

			ccs_limit_offsets[l].lim += ccs_limits[i].size;

		}

	}



	if (WARN_ON(ccs_limits[i].size))

		return -EINVAL;



	if (WARN_ON(l != CCS_L_LAST))

		return -EINVAL;



	return i2c_register_driver(THIS_MODULE, &smiapp_i2c_driver);

}



static void smiapp_module_cleanup(void)

{

	i2c_del_driver(&smiapp_i2c_driver);

}



module_init(smiapp_module_init);

module_exit(smiapp_module_cleanup);



MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");

MODULE_DESCRIPTION("Generic SMIA/SMIA++ camera module driver");