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Commit 96b1d500 authored by Heiko Stübner's avatar Heiko Stübner Committed by Florian Tobias Schandinat
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video: auo_k190x: add driver for AUO-K1900 variant 



This controller only supports smaller resolutions and only serial
updates, i.e. it has to wait for an update to finish before
starting another one.

Signed-off-by: default avatarHeiko Stübner <heiko@sntech.de>
Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
parent 2c8304d3

drivers/video/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -2399,6 +2399,14 @@ config FB_AUO_K190X 
	  controller drivers. You will also have to enable the driver

	  for the controller type used in your device.



config FB_AUO_K1900

	tristate "AUO-K1900 EPD controller support"

	depends on FB && FB_AUO_K190X

	help

	  This driver implements support for the AUO K1900 epd-controller.

	  This controller can drive Sipix epaper displays but can only do

	  serial updates, reducing the number of possible frames per second.



config FB_JZ4740

	tristate "JZ4740 LCD framebuffer support"

	depends on FB && MACH_JZ4740

drivers/video/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ obj-$(CONFIG_FB_MAXINE) += maxinefb.o 
obj-$(CONFIG_FB_METRONOME)        += metronomefb.o

obj-$(CONFIG_FB_BROADSHEET)       += broadsheetfb.o

obj-$(CONFIG_FB_AUO_K190X)	  += auo_k190x.o

obj-$(CONFIG_FB_AUO_K1900)	  += auo_k1900fb.o

obj-$(CONFIG_FB_S1D13XXX)	  += s1d13xxxfb.o

obj-$(CONFIG_FB_SH7760)		  += sh7760fb.o

obj-$(CONFIG_FB_IMX)              += imxfb.o

drivers/video/auo_k1900fb.c

0 → 100644
+198 −0
Original line number Diff line number Diff line 
/*

 * auok190xfb.c -- FB driver for AUO-K1900 controllers

 *

 * Copyright (C) 2011, 2012 Heiko Stuebner <heiko@sntech.de>

 *

 * based on broadsheetfb.c

 *

 * Copyright (C) 2008, Jaya Kumar

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.

 *

 * This driver is written to be used with the AUO-K1900 display controller.

 *

 * It is intended to be architecture independent. A board specific driver

 * must be used to perform all the physical IO interactions.

 *

 * The controller supports different update modes:

 * mode0+1 16 step gray (4bit)

 * mode2 4 step gray (2bit) - FIXME: add strange refresh

 * mode3 2 step gray (1bit) - FIXME: add strange refresh

 * mode4 handwriting mode (strange behaviour)

 * mode5 automatic selection of update mode

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/string.h>

#include <linux/mm.h>

#include <linux/slab.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/fb.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/list.h>

#include <linux/firmware.h>

#include <linux/gpio.h>

#include <linux/pm_runtime.h>



#include <video/auo_k190xfb.h>



#include "auo_k190x.h"



/*

 * AUO-K1900 specific commands

 */



#define AUOK1900_CMD_PARTIALDISP	0x1001

#define AUOK1900_CMD_ROTATION		0x1006

#define AUOK1900_CMD_LUT_STOP		0x1009



#define AUOK1900_INIT_TEMP_AVERAGE	(1 << 13)

#define AUOK1900_INIT_ROTATE(_x)	((_x & 0x3) << 10)

#define AUOK1900_INIT_RESOLUTION(_res)	((_res & 0x7) << 2)



static void auok1900_init(struct auok190xfb_par *par)

{

	struct auok190x_board *board = par->board;

	u16 init_param = 0;



	init_param |= AUOK1900_INIT_TEMP_AVERAGE;

	init_param |= AUOK1900_INIT_ROTATE(par->rotation);

	init_param |= AUOK190X_INIT_INVERSE_WHITE;

	init_param |= AUOK190X_INIT_FORMAT0;

	init_param |= AUOK1900_INIT_RESOLUTION(par->resolution);

	init_param |= AUOK190X_INIT_SHIFT_RIGHT;



	auok190x_send_cmdargs(par, AUOK190X_CMD_INIT, 1, &init_param);



	/* let the controller finish */

	board->wait_for_rdy(par);

}



static void auok1900_update_region(struct auok190xfb_par *par, int mode,

						u16 y1, u16 y2)

{

	struct device *dev = par->info->device;

	unsigned char *buf = (unsigned char *)par->info->screen_base;

	int xres = par->info->var.xres;

	u16 args[4];



	pm_runtime_get_sync(dev);



	mutex_lock(&(par->io_lock));



	/* y1 and y2 must be a multiple of 2 so drop the lowest bit */

	y1 &= 0xfffe;

	y2 &= 0xfffe;



	dev_dbg(dev, "update (x,y,w,h,mode)=(%d,%d,%d,%d,%d)\n",

		1, y1+1, xres, y2-y1, mode);



	/* to FIX handle different partial update modes */

	args[0] = mode | 1;

	args[1] = y1 + 1;

	args[2] = xres;

	args[3] = y2 - y1;

	buf += y1 * xres;

	auok190x_send_cmdargs_pixels(par, AUOK1900_CMD_PARTIALDISP, 4, args,

				     ((y2 - y1) * xres)/2, (u16 *) buf);

	auok190x_send_command(par, AUOK190X_CMD_DATA_STOP);



	par->update_cnt++;



	mutex_unlock(&(par->io_lock));



	pm_runtime_mark_last_busy(dev);

	pm_runtime_put_autosuspend(dev);

}



static void auok1900fb_dpy_update_pages(struct auok190xfb_par *par,

						u16 y1, u16 y2)

{

	int mode;



	if (par->update_mode < 0) {

		mode = AUOK190X_UPDATE_MODE(1);

		par->last_mode = -1;

	} else {

		mode = AUOK190X_UPDATE_MODE(par->update_mode);

		par->last_mode = par->update_mode;

	}



	if (par->flash)

		mode |= AUOK190X_UPDATE_NONFLASH;



	auok1900_update_region(par, mode, y1, y2);

}



static void auok1900fb_dpy_update(struct auok190xfb_par *par)

{

	int mode;



	if (par->update_mode < 0) {

		mode = AUOK190X_UPDATE_MODE(0);

		par->last_mode = -1;

	} else {

		mode = AUOK190X_UPDATE_MODE(par->update_mode);

		par->last_mode = par->update_mode;

	}



	if (par->flash)

		mode |= AUOK190X_UPDATE_NONFLASH;



	auok1900_update_region(par, mode, 0, par->info->var.yres);

	par->update_cnt = 0;

}



static bool auok1900fb_need_refresh(struct auok190xfb_par *par)

{

	return (par->update_cnt > 10);

}



static int __devinit auok1900fb_probe(struct platform_device *pdev)

{

	struct auok190x_init_data init;

	struct auok190x_board *board;



	/* pick up board specific routines */

	board = pdev->dev.platform_data;

	if (!board)

		return -EINVAL;



	/* fill temporary init struct for common init */

	init.id = "auo_k1900fb";

	init.board = board;

	init.update_partial = auok1900fb_dpy_update_pages;

	init.update_all = auok1900fb_dpy_update;

	init.need_refresh = auok1900fb_need_refresh;

	init.init = auok1900_init;



	return auok190x_common_probe(pdev, &init);

}



static int __devexit auok1900fb_remove(struct platform_device *pdev)

{

	return auok190x_common_remove(pdev);

}



static struct platform_driver auok1900fb_driver = {

	.probe	= auok1900fb_probe,

	.remove = __devexit_p(auok1900fb_remove),

	.driver	= {

		.owner	= THIS_MODULE,

		.name	= "auo_k1900fb",

		.pm = &auok190x_pm,

	},

};

module_platform_driver(auok1900fb_driver);



MODULE_DESCRIPTION("framebuffer driver for the AUO-K1900 EPD controller");

MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");

MODULE_LICENSE("GPL");