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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: Heiko Stübner <heiko@sntech.de> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This commit is contained in:
Heiko Stübner
Florian Tobias Schandinat
parent
2c8304d312
commit
96b1d500e0
@ -2399,6 +2399,14 @@ config FB_AUO_K190X
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controller drivers. You will also have to enable the driver
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for the controller type used in your device.
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config FB_AUO_K1900
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tristate "AUO-K1900 EPD controller support"
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depends on FB && FB_AUO_K190X
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help
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This driver implements support for the AUO K1900 epd-controller.
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This controller can drive Sipix epaper displays but can only do
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serial updates, reducing the number of possible frames per second.
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config FB_JZ4740
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tristate "JZ4740 LCD framebuffer support"
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depends on FB && MACH_JZ4740
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@ -119,6 +119,7 @@ obj-$(CONFIG_FB_MAXINE) += maxinefb.o
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obj-$(CONFIG_FB_METRONOME) += metronomefb.o
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obj-$(CONFIG_FB_BROADSHEET) += broadsheetfb.o
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obj-$(CONFIG_FB_AUO_K190X) += auo_k190x.o
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obj-$(CONFIG_FB_AUO_K1900) += auo_k1900fb.o
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obj-$(CONFIG_FB_S1D13XXX) += s1d13xxxfb.o
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obj-$(CONFIG_FB_SH7760) += sh7760fb.o
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obj-$(CONFIG_FB_IMX) += imxfb.o
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198
drivers/video/auo_k1900fb.c
Normal file
198
drivers/video/auo_k1900fb.c
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@ -0,0 +1,198 @@
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/*
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* auok190xfb.c -- FB driver for AUO-K1900 controllers
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*
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* Copyright (C) 2011, 2012 Heiko Stuebner <heiko@sntech.de>
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*
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* based on broadsheetfb.c
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*
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* Copyright (C) 2008, Jaya Kumar
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
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*
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* This driver is written to be used with the AUO-K1900 display controller.
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*
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* It is intended to be architecture independent. A board specific driver
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* must be used to perform all the physical IO interactions.
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*
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* The controller supports different update modes:
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* mode0+1 16 step gray (4bit)
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* mode2 4 step gray (2bit) - FIXME: add strange refresh
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* mode3 2 step gray (1bit) - FIXME: add strange refresh
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* mode4 handwriting mode (strange behaviour)
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* mode5 automatic selection of update mode
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/list.h>
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#include <linux/firmware.h>
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#include <linux/gpio.h>
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#include <linux/pm_runtime.h>
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#include <video/auo_k190xfb.h>
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#include "auo_k190x.h"
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/*
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* AUO-K1900 specific commands
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*/
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#define AUOK1900_CMD_PARTIALDISP 0x1001
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#define AUOK1900_CMD_ROTATION 0x1006
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#define AUOK1900_CMD_LUT_STOP 0x1009
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#define AUOK1900_INIT_TEMP_AVERAGE (1 << 13)
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#define AUOK1900_INIT_ROTATE(_x) ((_x & 0x3) << 10)
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#define AUOK1900_INIT_RESOLUTION(_res) ((_res & 0x7) << 2)
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static void auok1900_init(struct auok190xfb_par *par)
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{
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struct auok190x_board *board = par->board;
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u16 init_param = 0;
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init_param |= AUOK1900_INIT_TEMP_AVERAGE;
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init_param |= AUOK1900_INIT_ROTATE(par->rotation);
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init_param |= AUOK190X_INIT_INVERSE_WHITE;
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init_param |= AUOK190X_INIT_FORMAT0;
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init_param |= AUOK1900_INIT_RESOLUTION(par->resolution);
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init_param |= AUOK190X_INIT_SHIFT_RIGHT;
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auok190x_send_cmdargs(par, AUOK190X_CMD_INIT, 1, &init_param);
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/* let the controller finish */
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board->wait_for_rdy(par);
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}
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static void auok1900_update_region(struct auok190xfb_par *par, int mode,
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u16 y1, u16 y2)
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{
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struct device *dev = par->info->device;
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unsigned char *buf = (unsigned char *)par->info->screen_base;
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int xres = par->info->var.xres;
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u16 args[4];
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pm_runtime_get_sync(dev);
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mutex_lock(&(par->io_lock));
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/* y1 and y2 must be a multiple of 2 so drop the lowest bit */
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y1 &= 0xfffe;
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y2 &= 0xfffe;
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dev_dbg(dev, "update (x,y,w,h,mode)=(%d,%d,%d,%d,%d)\n",
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1, y1+1, xres, y2-y1, mode);
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/* to FIX handle different partial update modes */
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args[0] = mode | 1;
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args[1] = y1 + 1;
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args[2] = xres;
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args[3] = y2 - y1;
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buf += y1 * xres;
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auok190x_send_cmdargs_pixels(par, AUOK1900_CMD_PARTIALDISP, 4, args,
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((y2 - y1) * xres)/2, (u16 *) buf);
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auok190x_send_command(par, AUOK190X_CMD_DATA_STOP);
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par->update_cnt++;
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mutex_unlock(&(par->io_lock));
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pm_runtime_mark_last_busy(dev);
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pm_runtime_put_autosuspend(dev);
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}
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static void auok1900fb_dpy_update_pages(struct auok190xfb_par *par,
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u16 y1, u16 y2)
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{
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int mode;
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if (par->update_mode < 0) {
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mode = AUOK190X_UPDATE_MODE(1);
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par->last_mode = -1;
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} else {
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mode = AUOK190X_UPDATE_MODE(par->update_mode);
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par->last_mode = par->update_mode;
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}
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if (par->flash)
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mode |= AUOK190X_UPDATE_NONFLASH;
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auok1900_update_region(par, mode, y1, y2);
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}
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static void auok1900fb_dpy_update(struct auok190xfb_par *par)
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{
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int mode;
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if (par->update_mode < 0) {
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mode = AUOK190X_UPDATE_MODE(0);
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par->last_mode = -1;
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} else {
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mode = AUOK190X_UPDATE_MODE(par->update_mode);
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par->last_mode = par->update_mode;
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}
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if (par->flash)
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mode |= AUOK190X_UPDATE_NONFLASH;
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auok1900_update_region(par, mode, 0, par->info->var.yres);
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par->update_cnt = 0;
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}
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static bool auok1900fb_need_refresh(struct auok190xfb_par *par)
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{
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return (par->update_cnt > 10);
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}
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static int __devinit auok1900fb_probe(struct platform_device *pdev)
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{
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struct auok190x_init_data init;
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struct auok190x_board *board;
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/* pick up board specific routines */
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board = pdev->dev.platform_data;
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if (!board)
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return -EINVAL;
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/* fill temporary init struct for common init */
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init.id = "auo_k1900fb";
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init.board = board;
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init.update_partial = auok1900fb_dpy_update_pages;
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init.update_all = auok1900fb_dpy_update;
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init.need_refresh = auok1900fb_need_refresh;
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init.init = auok1900_init;
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return auok190x_common_probe(pdev, &init);
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}
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static int __devexit auok1900fb_remove(struct platform_device *pdev)
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{
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return auok190x_common_remove(pdev);
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}
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static struct platform_driver auok1900fb_driver = {
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.probe = auok1900fb_probe,
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.remove = __devexit_p(auok1900fb_remove),
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.driver = {
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.owner = THIS_MODULE,
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.name = "auo_k1900fb",
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.pm = &auok190x_pm,
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},
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};
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module_platform_driver(auok1900fb_driver);
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MODULE_DESCRIPTION("framebuffer driver for the AUO-K1900 EPD controller");
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MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
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MODULE_LICENSE("GPL");
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