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![Matthew Garrett](/assets/img/avatar_default.png)
There may be multiple ways of controlling the backlight on a given machine. Allow drivers to expose the type of interface they are providing, making it possible for userspace to make appropriate policy decisions. Signed-off-by: Matthew Garrett <mjg@redhat.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: David Airlie <airlied@linux.ie> Cc: Alex Deucher <alexdeucher@gmail.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <lenb@kernel.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
924 lines
18 KiB
C
924 lines
18 KiB
C
/*
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* S6E63M0 AMOLED LCD panel driver.
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*
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* Author: InKi Dae <inki.dae@samsung.com>
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*
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* Derived from drivers/video/omap/lcd-apollon.c
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/wait.h>
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#include <linux/fb.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/spi/spi.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/lcd.h>
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#include <linux/backlight.h>
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#include "s6e63m0_gamma.h"
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#define SLEEPMSEC 0x1000
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#define ENDDEF 0x2000
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#define DEFMASK 0xFF00
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#define COMMAND_ONLY 0xFE
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#define DATA_ONLY 0xFF
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#define MIN_BRIGHTNESS 0
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#define MAX_BRIGHTNESS 10
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#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
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struct s6e63m0 {
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struct device *dev;
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struct spi_device *spi;
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unsigned int power;
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unsigned int current_brightness;
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unsigned int gamma_mode;
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unsigned int gamma_table_count;
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struct lcd_device *ld;
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struct backlight_device *bd;
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struct lcd_platform_data *lcd_pd;
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};
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static const unsigned short SEQ_PANEL_CONDITION_SET[] = {
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0xF8, 0x01,
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DATA_ONLY, 0x27,
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DATA_ONLY, 0x27,
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DATA_ONLY, 0x07,
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DATA_ONLY, 0x07,
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DATA_ONLY, 0x54,
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DATA_ONLY, 0x9f,
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DATA_ONLY, 0x63,
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DATA_ONLY, 0x86,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x33,
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DATA_ONLY, 0x0d,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_DISPLAY_CONDITION_SET[] = {
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0xf2, 0x02,
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DATA_ONLY, 0x03,
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DATA_ONLY, 0x1c,
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DATA_ONLY, 0x10,
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DATA_ONLY, 0x10,
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0xf7, 0x03,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_GAMMA_SETTING[] = {
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0xfa, 0x00,
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DATA_ONLY, 0x18,
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DATA_ONLY, 0x08,
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DATA_ONLY, 0x24,
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DATA_ONLY, 0x64,
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DATA_ONLY, 0x56,
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DATA_ONLY, 0x33,
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DATA_ONLY, 0xb6,
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DATA_ONLY, 0xba,
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DATA_ONLY, 0xa8,
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DATA_ONLY, 0xac,
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DATA_ONLY, 0xb1,
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DATA_ONLY, 0x9d,
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DATA_ONLY, 0xc1,
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DATA_ONLY, 0xc1,
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DATA_ONLY, 0xb7,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x9c,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x9f,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0xd6,
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0xfa, 0x01,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_ETC_CONDITION_SET[] = {
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0xf6, 0x00,
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DATA_ONLY, 0x8c,
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DATA_ONLY, 0x07,
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0xb3, 0xc,
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0xb5, 0x2c,
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DATA_ONLY, 0x12,
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DATA_ONLY, 0x0c,
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DATA_ONLY, 0x0a,
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DATA_ONLY, 0x10,
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DATA_ONLY, 0x0e,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x13,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x2a,
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DATA_ONLY, 0x24,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1b,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x2b,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x3a,
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DATA_ONLY, 0x34,
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DATA_ONLY, 0x30,
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DATA_ONLY, 0x2c,
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DATA_ONLY, 0x29,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x25,
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DATA_ONLY, 0x23,
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DATA_ONLY, 0x21,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x1e,
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DATA_ONLY, 0x1e,
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0xb6, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x11,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x33,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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0xb7, 0x2c,
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DATA_ONLY, 0x12,
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DATA_ONLY, 0x0c,
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DATA_ONLY, 0x0a,
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DATA_ONLY, 0x10,
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DATA_ONLY, 0x0e,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x13,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x2a,
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DATA_ONLY, 0x24,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1b,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x2b,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x3a,
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DATA_ONLY, 0x34,
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DATA_ONLY, 0x30,
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DATA_ONLY, 0x2c,
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DATA_ONLY, 0x29,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x25,
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DATA_ONLY, 0x23,
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DATA_ONLY, 0x21,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x1e,
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DATA_ONLY, 0x1e,
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0xb8, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x11,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x33,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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0xb9, 0x2c,
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DATA_ONLY, 0x12,
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DATA_ONLY, 0x0c,
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DATA_ONLY, 0x0a,
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DATA_ONLY, 0x10,
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DATA_ONLY, 0x0e,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x13,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x2a,
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DATA_ONLY, 0x24,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x1b,
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DATA_ONLY, 0x1a,
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DATA_ONLY, 0x17,
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DATA_ONLY, 0x2b,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x3a,
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DATA_ONLY, 0x34,
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DATA_ONLY, 0x30,
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DATA_ONLY, 0x2c,
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DATA_ONLY, 0x29,
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DATA_ONLY, 0x26,
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DATA_ONLY, 0x25,
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DATA_ONLY, 0x23,
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DATA_ONLY, 0x21,
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DATA_ONLY, 0x20,
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DATA_ONLY, 0x1e,
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DATA_ONLY, 0x1e,
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0xba, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x11,
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DATA_ONLY, 0x22,
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DATA_ONLY, 0x33,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x44,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x55,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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DATA_ONLY, 0x66,
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0xc1, 0x4d,
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DATA_ONLY, 0x96,
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DATA_ONLY, 0x1d,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x01,
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DATA_ONLY, 0xdf,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x03,
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DATA_ONLY, 0x1f,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x00,
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DATA_ONLY, 0x03,
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DATA_ONLY, 0x06,
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DATA_ONLY, 0x09,
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DATA_ONLY, 0x0d,
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DATA_ONLY, 0x0f,
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DATA_ONLY, 0x12,
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DATA_ONLY, 0x15,
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DATA_ONLY, 0x18,
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0xb2, 0x10,
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DATA_ONLY, 0x10,
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DATA_ONLY, 0x0b,
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DATA_ONLY, 0x05,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_ACL_ON[] = {
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/* ACL on */
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0xc0, 0x01,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_ACL_OFF[] = {
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/* ACL off */
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0xc0, 0x00,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_ELVSS_ON[] = {
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/* ELVSS on */
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0xb1, 0x0b,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_ELVSS_OFF[] = {
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/* ELVSS off */
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0xb1, 0x0a,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_STAND_BY_OFF[] = {
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0x11, COMMAND_ONLY,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_STAND_BY_ON[] = {
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0x10, COMMAND_ONLY,
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ENDDEF, 0x0000
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};
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static const unsigned short SEQ_DISPLAY_ON[] = {
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0x29, COMMAND_ONLY,
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ENDDEF, 0x0000
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};
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static int s6e63m0_spi_write_byte(struct s6e63m0 *lcd, int addr, int data)
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{
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u16 buf[1];
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struct spi_message msg;
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struct spi_transfer xfer = {
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.len = 2,
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.tx_buf = buf,
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};
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buf[0] = (addr << 8) | data;
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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return spi_sync(lcd->spi, &msg);
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}
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static int s6e63m0_spi_write(struct s6e63m0 *lcd, unsigned char address,
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unsigned char command)
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{
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int ret = 0;
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if (address != DATA_ONLY)
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ret = s6e63m0_spi_write_byte(lcd, 0x0, address);
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if (command != COMMAND_ONLY)
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ret = s6e63m0_spi_write_byte(lcd, 0x1, command);
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return ret;
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}
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static int s6e63m0_panel_send_sequence(struct s6e63m0 *lcd,
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const unsigned short *wbuf)
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{
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int ret = 0, i = 0;
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while ((wbuf[i] & DEFMASK) != ENDDEF) {
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if ((wbuf[i] & DEFMASK) != SLEEPMSEC) {
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ret = s6e63m0_spi_write(lcd, wbuf[i], wbuf[i+1]);
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if (ret)
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break;
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} else
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udelay(wbuf[i+1]*1000);
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i += 2;
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}
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return ret;
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}
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static int _s6e63m0_gamma_ctl(struct s6e63m0 *lcd, const unsigned int *gamma)
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{
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unsigned int i = 0;
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int ret = 0;
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/* disable gamma table updating. */
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ret = s6e63m0_spi_write(lcd, 0xfa, 0x00);
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if (ret) {
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dev_err(lcd->dev, "failed to disable gamma table updating.\n");
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goto gamma_err;
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}
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for (i = 0 ; i < GAMMA_TABLE_COUNT; i++) {
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ret = s6e63m0_spi_write(lcd, DATA_ONLY, gamma[i]);
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if (ret) {
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dev_err(lcd->dev, "failed to set gamma table.\n");
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goto gamma_err;
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}
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}
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/* update gamma table. */
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ret = s6e63m0_spi_write(lcd, 0xfa, 0x01);
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if (ret)
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dev_err(lcd->dev, "failed to update gamma table.\n");
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gamma_err:
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return ret;
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}
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static int s6e63m0_gamma_ctl(struct s6e63m0 *lcd, int gamma)
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{
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int ret = 0;
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ret = _s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]);
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return ret;
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}
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static int s6e63m0_ldi_init(struct s6e63m0 *lcd)
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{
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int ret, i;
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const unsigned short *init_seq[] = {
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SEQ_PANEL_CONDITION_SET,
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SEQ_DISPLAY_CONDITION_SET,
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SEQ_GAMMA_SETTING,
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SEQ_ETC_CONDITION_SET,
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SEQ_ACL_ON,
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SEQ_ELVSS_ON,
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};
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for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
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ret = s6e63m0_panel_send_sequence(lcd, init_seq[i]);
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if (ret)
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break;
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}
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return ret;
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}
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static int s6e63m0_ldi_enable(struct s6e63m0 *lcd)
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{
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int ret = 0, i;
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const unsigned short *enable_seq[] = {
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SEQ_STAND_BY_OFF,
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SEQ_DISPLAY_ON,
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};
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for (i = 0; i < ARRAY_SIZE(enable_seq); i++) {
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ret = s6e63m0_panel_send_sequence(lcd, enable_seq[i]);
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if (ret)
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break;
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}
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return ret;
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}
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static int s6e63m0_ldi_disable(struct s6e63m0 *lcd)
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{
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int ret;
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ret = s6e63m0_panel_send_sequence(lcd, SEQ_STAND_BY_ON);
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return ret;
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}
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static int s6e63m0_power_on(struct s6e63m0 *lcd)
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{
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int ret = 0;
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struct lcd_platform_data *pd = NULL;
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struct backlight_device *bd = NULL;
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pd = lcd->lcd_pd;
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if (!pd) {
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dev_err(lcd->dev, "platform data is NULL.\n");
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return -EFAULT;
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}
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bd = lcd->bd;
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if (!bd) {
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dev_err(lcd->dev, "backlight device is NULL.\n");
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return -EFAULT;
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}
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if (!pd->power_on) {
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dev_err(lcd->dev, "power_on is NULL.\n");
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return -EFAULT;
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} else {
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pd->power_on(lcd->ld, 1);
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mdelay(pd->power_on_delay);
|
|
}
|
|
|
|
if (!pd->reset) {
|
|
dev_err(lcd->dev, "reset is NULL.\n");
|
|
return -EFAULT;
|
|
} else {
|
|
pd->reset(lcd->ld);
|
|
mdelay(pd->reset_delay);
|
|
}
|
|
|
|
ret = s6e63m0_ldi_init(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "failed to initialize ldi.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = s6e63m0_ldi_enable(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "failed to enable ldi.\n");
|
|
return ret;
|
|
}
|
|
|
|
/* set brightness to current value after power on or resume. */
|
|
ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "lcd gamma setting failed.\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s6e63m0_power_off(struct s6e63m0 *lcd)
|
|
{
|
|
int ret = 0;
|
|
struct lcd_platform_data *pd = NULL;
|
|
|
|
pd = lcd->lcd_pd;
|
|
if (!pd) {
|
|
dev_err(lcd->dev, "platform data is NULL.\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
ret = s6e63m0_ldi_disable(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "lcd setting failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
mdelay(pd->power_off_delay);
|
|
|
|
if (!pd->power_on) {
|
|
dev_err(lcd->dev, "power_on is NULL.\n");
|
|
return -EFAULT;
|
|
} else
|
|
pd->power_on(lcd->ld, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s6e63m0_power(struct s6e63m0 *lcd, int power)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
|
|
ret = s6e63m0_power_on(lcd);
|
|
else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
|
|
ret = s6e63m0_power_off(lcd);
|
|
|
|
if (!ret)
|
|
lcd->power = power;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int s6e63m0_set_power(struct lcd_device *ld, int power)
|
|
{
|
|
struct s6e63m0 *lcd = lcd_get_data(ld);
|
|
|
|
if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
|
|
power != FB_BLANK_NORMAL) {
|
|
dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return s6e63m0_power(lcd, power);
|
|
}
|
|
|
|
static int s6e63m0_get_power(struct lcd_device *ld)
|
|
{
|
|
struct s6e63m0 *lcd = lcd_get_data(ld);
|
|
|
|
return lcd->power;
|
|
}
|
|
|
|
static int s6e63m0_get_brightness(struct backlight_device *bd)
|
|
{
|
|
return bd->props.brightness;
|
|
}
|
|
|
|
static int s6e63m0_set_brightness(struct backlight_device *bd)
|
|
{
|
|
int ret = 0, brightness = bd->props.brightness;
|
|
struct s6e63m0 *lcd = bl_get_data(bd);
|
|
|
|
if (brightness < MIN_BRIGHTNESS ||
|
|
brightness > bd->props.max_brightness) {
|
|
dev_err(&bd->dev, "lcd brightness should be %d to %d.\n",
|
|
MIN_BRIGHTNESS, MAX_BRIGHTNESS);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = s6e63m0_gamma_ctl(lcd, bd->props.brightness);
|
|
if (ret) {
|
|
dev_err(&bd->dev, "lcd brightness setting failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct lcd_ops s6e63m0_lcd_ops = {
|
|
.set_power = s6e63m0_set_power,
|
|
.get_power = s6e63m0_get_power,
|
|
};
|
|
|
|
static const struct backlight_ops s6e63m0_backlight_ops = {
|
|
.get_brightness = s6e63m0_get_brightness,
|
|
.update_status = s6e63m0_set_brightness,
|
|
};
|
|
|
|
static ssize_t s6e63m0_sysfs_show_gamma_mode(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct s6e63m0 *lcd = dev_get_drvdata(dev);
|
|
char temp[10];
|
|
|
|
switch (lcd->gamma_mode) {
|
|
case 0:
|
|
sprintf(temp, "2.2 mode\n");
|
|
strcat(buf, temp);
|
|
break;
|
|
case 1:
|
|
sprintf(temp, "1.9 mode\n");
|
|
strcat(buf, temp);
|
|
break;
|
|
case 2:
|
|
sprintf(temp, "1.7 mode\n");
|
|
strcat(buf, temp);
|
|
break;
|
|
default:
|
|
dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7)n");
|
|
break;
|
|
}
|
|
|
|
return strlen(buf);
|
|
}
|
|
|
|
static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct s6e63m0 *lcd = dev_get_drvdata(dev);
|
|
struct backlight_device *bd = NULL;
|
|
int brightness, rc;
|
|
|
|
rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
bd = lcd->bd;
|
|
|
|
brightness = bd->props.brightness;
|
|
|
|
switch (lcd->gamma_mode) {
|
|
case 0:
|
|
_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]);
|
|
break;
|
|
case 1:
|
|
_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_19_table[brightness]);
|
|
break;
|
|
case 2:
|
|
_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_17_table[brightness]);
|
|
break;
|
|
default:
|
|
dev_info(dev, "gamma mode could be 0:2.2, 1:1.9 or 2:1.7\n");
|
|
_s6e63m0_gamma_ctl(lcd, gamma_table.gamma_22_table[brightness]);
|
|
break;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static DEVICE_ATTR(gamma_mode, 0644,
|
|
s6e63m0_sysfs_show_gamma_mode, s6e63m0_sysfs_store_gamma_mode);
|
|
|
|
static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct s6e63m0 *lcd = dev_get_drvdata(dev);
|
|
char temp[3];
|
|
|
|
sprintf(temp, "%d\n", lcd->gamma_table_count);
|
|
strcpy(buf, temp);
|
|
|
|
return strlen(buf);
|
|
}
|
|
static DEVICE_ATTR(gamma_table, 0444,
|
|
s6e63m0_sysfs_show_gamma_table, NULL);
|
|
|
|
static int __devinit s6e63m0_probe(struct spi_device *spi)
|
|
{
|
|
int ret = 0;
|
|
struct s6e63m0 *lcd = NULL;
|
|
struct lcd_device *ld = NULL;
|
|
struct backlight_device *bd = NULL;
|
|
|
|
lcd = kzalloc(sizeof(struct s6e63m0), GFP_KERNEL);
|
|
if (!lcd)
|
|
return -ENOMEM;
|
|
|
|
/* s6e63m0 lcd panel uses 3-wire 9bits SPI Mode. */
|
|
spi->bits_per_word = 9;
|
|
|
|
ret = spi_setup(spi);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "spi setup failed.\n");
|
|
goto out_free_lcd;
|
|
}
|
|
|
|
lcd->spi = spi;
|
|
lcd->dev = &spi->dev;
|
|
|
|
lcd->lcd_pd = (struct lcd_platform_data *)spi->dev.platform_data;
|
|
if (!lcd->lcd_pd) {
|
|
dev_err(&spi->dev, "platform data is NULL.\n");
|
|
goto out_free_lcd;
|
|
}
|
|
|
|
ld = lcd_device_register("s6e63m0", &spi->dev, lcd, &s6e63m0_lcd_ops);
|
|
if (IS_ERR(ld)) {
|
|
ret = PTR_ERR(ld);
|
|
goto out_free_lcd;
|
|
}
|
|
|
|
lcd->ld = ld;
|
|
|
|
bd = backlight_device_register("s6e63m0bl-bl", &spi->dev, lcd,
|
|
&s6e63m0_backlight_ops, NULL);
|
|
if (IS_ERR(bd)) {
|
|
ret = PTR_ERR(bd);
|
|
goto out_lcd_unregister;
|
|
}
|
|
|
|
bd->props.max_brightness = MAX_BRIGHTNESS;
|
|
bd->props.brightness = MAX_BRIGHTNESS;
|
|
bd->props.type = BACKLIGHT_RAW;
|
|
lcd->bd = bd;
|
|
|
|
/*
|
|
* it gets gamma table count available so it gets user
|
|
* know that.
|
|
*/
|
|
lcd->gamma_table_count =
|
|
sizeof(gamma_table) / (MAX_GAMMA_LEVEL * sizeof(int));
|
|
|
|
ret = device_create_file(&(spi->dev), &dev_attr_gamma_mode);
|
|
if (ret < 0)
|
|
dev_err(&(spi->dev), "failed to add sysfs entries\n");
|
|
|
|
ret = device_create_file(&(spi->dev), &dev_attr_gamma_table);
|
|
if (ret < 0)
|
|
dev_err(&(spi->dev), "failed to add sysfs entries\n");
|
|
|
|
/*
|
|
* if lcd panel was on from bootloader like u-boot then
|
|
* do not lcd on.
|
|
*/
|
|
if (!lcd->lcd_pd->lcd_enabled) {
|
|
/*
|
|
* if lcd panel was off from bootloader then
|
|
* current lcd status is powerdown and then
|
|
* it enables lcd panel.
|
|
*/
|
|
lcd->power = FB_BLANK_POWERDOWN;
|
|
|
|
s6e63m0_power(lcd, FB_BLANK_UNBLANK);
|
|
} else
|
|
lcd->power = FB_BLANK_UNBLANK;
|
|
|
|
dev_set_drvdata(&spi->dev, lcd);
|
|
|
|
dev_info(&spi->dev, "s6e63m0 panel driver has been probed.\n");
|
|
|
|
return 0;
|
|
|
|
out_lcd_unregister:
|
|
lcd_device_unregister(ld);
|
|
out_free_lcd:
|
|
kfree(lcd);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit s6e63m0_remove(struct spi_device *spi)
|
|
{
|
|
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
|
|
|
|
s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
|
|
device_remove_file(&spi->dev, &dev_attr_gamma_table);
|
|
device_remove_file(&spi->dev, &dev_attr_gamma_mode);
|
|
backlight_device_unregister(lcd->bd);
|
|
lcd_device_unregister(lcd->ld);
|
|
kfree(lcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_PM)
|
|
unsigned int before_power;
|
|
|
|
static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
|
|
{
|
|
int ret = 0;
|
|
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
|
|
|
|
dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
|
|
|
|
before_power = lcd->power;
|
|
|
|
/*
|
|
* when lcd panel is suspend, lcd panel becomes off
|
|
* regardless of status.
|
|
*/
|
|
ret = s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int s6e63m0_resume(struct spi_device *spi)
|
|
{
|
|
int ret = 0;
|
|
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
|
|
|
|
/*
|
|
* after suspended, if lcd panel status is FB_BLANK_UNBLANK
|
|
* (at that time, before_power is FB_BLANK_UNBLANK) then
|
|
* it changes that status to FB_BLANK_POWERDOWN to get lcd on.
|
|
*/
|
|
if (before_power == FB_BLANK_UNBLANK)
|
|
lcd->power = FB_BLANK_POWERDOWN;
|
|
|
|
dev_dbg(&spi->dev, "before_power = %d\n", before_power);
|
|
|
|
ret = s6e63m0_power(lcd, before_power);
|
|
|
|
return ret;
|
|
}
|
|
#else
|
|
#define s6e63m0_suspend NULL
|
|
#define s6e63m0_resume NULL
|
|
#endif
|
|
|
|
/* Power down all displays on reboot, poweroff or halt. */
|
|
static void s6e63m0_shutdown(struct spi_device *spi)
|
|
{
|
|
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
|
|
|
|
s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
|
|
}
|
|
|
|
static struct spi_driver s6e63m0_driver = {
|
|
.driver = {
|
|
.name = "s6e63m0",
|
|
.bus = &spi_bus_type,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = s6e63m0_probe,
|
|
.remove = __devexit_p(s6e63m0_remove),
|
|
.shutdown = s6e63m0_shutdown,
|
|
.suspend = s6e63m0_suspend,
|
|
.resume = s6e63m0_resume,
|
|
};
|
|
|
|
static int __init s6e63m0_init(void)
|
|
{
|
|
return spi_register_driver(&s6e63m0_driver);
|
|
}
|
|
|
|
static void __exit s6e63m0_exit(void)
|
|
{
|
|
spi_unregister_driver(&s6e63m0_driver);
|
|
}
|
|
|
|
module_init(s6e63m0_init);
|
|
module_exit(s6e63m0_exit);
|
|
|
|
MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
|
|
MODULE_DESCRIPTION("S6E63M0 LCD Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|