![Ingo Molnar](/assets/img/avatar_default.png)
Use the freshly introduced, reduced size <linux/mm_types_task.h> header instead. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
1197 lines
28 KiB
C
1197 lines
28 KiB
C
/*
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* Common code for AUO-K190X framebuffer drivers
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*
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* Copyright (C) 2012 Heiko Stuebner <heiko@sntech.de>
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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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#include <linux/module.h>
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#include <linux/sched/mm.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/fb.h>
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#include <linux/delay.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/regulator/consumer.h>
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#include <video/auo_k190xfb.h>
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#include "auo_k190x.h"
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struct panel_info {
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int w;
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int h;
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};
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/* table of panel specific parameters to be indexed into by the board drivers */
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static struct panel_info panel_table[] = {
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/* standard 6" */
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[AUOK190X_RESOLUTION_800_600] = {
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.w = 800,
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.h = 600,
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},
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/* standard 9" */
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[AUOK190X_RESOLUTION_1024_768] = {
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.w = 1024,
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.h = 768,
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},
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[AUOK190X_RESOLUTION_600_800] = {
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.w = 600,
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.h = 800,
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},
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[AUOK190X_RESOLUTION_768_1024] = {
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.w = 768,
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.h = 1024,
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},
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};
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/*
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* private I80 interface to the board driver
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*/
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static void auok190x_issue_data(struct auok190xfb_par *par, u16 data)
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{
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par->board->set_ctl(par, AUOK190X_I80_WR, 0);
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par->board->set_hdb(par, data);
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par->board->set_ctl(par, AUOK190X_I80_WR, 1);
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}
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static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data)
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{
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par->board->set_ctl(par, AUOK190X_I80_DC, 0);
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auok190x_issue_data(par, data);
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par->board->set_ctl(par, AUOK190X_I80_DC, 1);
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}
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/**
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* Conversion of 16bit color to 4bit grayscale
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* does roughly (0.3 * R + 0.6 G + 0.1 B) / 2
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*/
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static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var)
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{
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return ((((data & 0xF800) >> var->red.offset) * 77 +
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((data & 0x07E0) >> (var->green.offset + 1)) * 151 +
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((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1);
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}
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static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size,
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u16 *data)
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{
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struct fb_var_screeninfo *var = &par->info->var;
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struct device *dev = par->info->device;
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int i;
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u16 tmp;
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if (size & 7) {
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dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n",
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size);
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return -EINVAL;
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}
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for (i = 0; i < (size >> 2); i++) {
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par->board->set_ctl(par, AUOK190X_I80_WR, 0);
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tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F);
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tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0;
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tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00;
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tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000;
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par->board->set_hdb(par, tmp);
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par->board->set_ctl(par, AUOK190X_I80_WR, 1);
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}
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return 0;
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}
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static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size,
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u16 *data)
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{
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struct device *dev = par->info->device;
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int i;
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u16 tmp;
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if (size & 3) {
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dev_err(dev, "issue_pixels: size %d must be a multiple of 4\n",
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size);
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return -EINVAL;
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}
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for (i = 0; i < (size >> 1); i++) {
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par->board->set_ctl(par, AUOK190X_I80_WR, 0);
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/* simple reduction of 8bit staticgray to 4bit gray
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* combines 4 * 4bit pixel values into a 16bit value
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*/
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tmp = (data[2*i] & 0xF0) >> 4;
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tmp |= (data[2*i] & 0xF000) >> 8;
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tmp |= (data[2*i+1] & 0xF0) << 4;
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tmp |= (data[2*i+1] & 0xF000);
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par->board->set_hdb(par, tmp);
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par->board->set_ctl(par, AUOK190X_I80_WR, 1);
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}
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return 0;
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}
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static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
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u16 *data)
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{
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struct fb_info *info = par->info;
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struct device *dev = par->info->device;
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if (info->var.bits_per_pixel == 8 && info->var.grayscale)
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auok190x_issue_pixels_gray8(par, size, data);
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else if (info->var.bits_per_pixel == 16)
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auok190x_issue_pixels_rgb565(par, size, data);
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else
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dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n",
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info->var.bits_per_pixel, info->var.grayscale);
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return 0;
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}
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static u16 auok190x_read_data(struct auok190xfb_par *par)
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{
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u16 data;
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par->board->set_ctl(par, AUOK190X_I80_OE, 0);
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data = par->board->get_hdb(par);
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par->board->set_ctl(par, AUOK190X_I80_OE, 1);
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return data;
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}
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/*
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* Command interface for the controller drivers
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*/
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void auok190x_send_command_nowait(struct auok190xfb_par *par, u16 data)
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{
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par->board->set_ctl(par, AUOK190X_I80_CS, 0);
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auok190x_issue_cmd(par, data);
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par->board->set_ctl(par, AUOK190X_I80_CS, 1);
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}
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EXPORT_SYMBOL_GPL(auok190x_send_command_nowait);
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void auok190x_send_cmdargs_nowait(struct auok190xfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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int i;
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par->board->set_ctl(par, AUOK190X_I80_CS, 0);
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auok190x_issue_cmd(par, cmd);
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for (i = 0; i < argc; i++)
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auok190x_issue_data(par, argv[i]);
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par->board->set_ctl(par, AUOK190X_I80_CS, 1);
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}
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EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_nowait);
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int auok190x_send_command(struct auok190xfb_par *par, u16 data)
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{
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int ret;
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ret = par->board->wait_for_rdy(par);
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if (ret)
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return ret;
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auok190x_send_command_nowait(par, data);
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return 0;
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}
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EXPORT_SYMBOL_GPL(auok190x_send_command);
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int auok190x_send_cmdargs(struct auok190xfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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int ret;
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ret = par->board->wait_for_rdy(par);
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if (ret)
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return ret;
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auok190x_send_cmdargs_nowait(par, cmd, argc, argv);
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return 0;
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}
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EXPORT_SYMBOL_GPL(auok190x_send_cmdargs);
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int auok190x_read_cmdargs(struct auok190xfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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int i, ret;
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ret = par->board->wait_for_rdy(par);
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if (ret)
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return ret;
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par->board->set_ctl(par, AUOK190X_I80_CS, 0);
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auok190x_issue_cmd(par, cmd);
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for (i = 0; i < argc; i++)
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argv[i] = auok190x_read_data(par);
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par->board->set_ctl(par, AUOK190X_I80_CS, 1);
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return 0;
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}
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EXPORT_SYMBOL_GPL(auok190x_read_cmdargs);
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void auok190x_send_cmdargs_pixels_nowait(struct auok190xfb_par *par, u16 cmd,
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int argc, u16 *argv, int size, u16 *data)
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{
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int i;
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par->board->set_ctl(par, AUOK190X_I80_CS, 0);
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auok190x_issue_cmd(par, cmd);
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for (i = 0; i < argc; i++)
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auok190x_issue_data(par, argv[i]);
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auok190x_issue_pixels(par, size, data);
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par->board->set_ctl(par, AUOK190X_I80_CS, 1);
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}
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EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels_nowait);
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int auok190x_send_cmdargs_pixels(struct auok190xfb_par *par, u16 cmd,
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int argc, u16 *argv, int size, u16 *data)
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{
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int ret;
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ret = par->board->wait_for_rdy(par);
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if (ret)
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return ret;
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auok190x_send_cmdargs_pixels_nowait(par, cmd, argc, argv, size, data);
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return 0;
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}
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EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels);
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/*
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* fbdefio callbacks - common on both controllers.
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*/
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static void auok190xfb_dpy_first_io(struct fb_info *info)
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{
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/* tell runtime-pm that we wish to use the device in a short time */
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pm_runtime_get(info->device);
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}
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/* this is called back from the deferred io workqueue */
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static void auok190xfb_dpy_deferred_io(struct fb_info *info,
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struct list_head *pagelist)
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{
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struct fb_deferred_io *fbdefio = info->fbdefio;
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struct auok190xfb_par *par = info->par;
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u16 line_length = info->fix.line_length;
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u16 yres = info->var.yres;
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u16 y1 = 0, h = 0;
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int prev_index = -1;
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struct page *cur;
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int h_inc;
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int threshold;
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if (!list_empty(pagelist))
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/* the device resume should've been requested through first_io,
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* if the resume did not finish until now, wait for it.
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*/
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pm_runtime_barrier(info->device);
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else
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/* We reached this via the fsync or some other way.
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* In either case the first_io function did not run,
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* so we runtime_resume the device here synchronously.
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*/
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pm_runtime_get_sync(info->device);
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/* Do a full screen update every n updates to prevent
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* excessive darkening of the Sipix display.
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* If we do this, there is no need to walk the pages.
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*/
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if (par->need_refresh(par)) {
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par->update_all(par);
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goto out;
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}
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/* height increment is fixed per page */
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h_inc = DIV_ROUND_UP(PAGE_SIZE , line_length);
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/* calculate number of pages from pixel height */
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threshold = par->consecutive_threshold / h_inc;
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if (threshold < 1)
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threshold = 1;
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/* walk the written page list and swizzle the data */
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list_for_each_entry(cur, &fbdefio->pagelist, lru) {
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if (prev_index < 0) {
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/* just starting so assign first page */
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y1 = (cur->index << PAGE_SHIFT) / line_length;
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h = h_inc;
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} else if ((cur->index - prev_index) <= threshold) {
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/* page is within our threshold for single updates */
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h += h_inc * (cur->index - prev_index);
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} else {
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/* page not consecutive, issue previous update first */
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par->update_partial(par, y1, y1 + h);
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/* start over with our non consecutive page */
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y1 = (cur->index << PAGE_SHIFT) / line_length;
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h = h_inc;
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}
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prev_index = cur->index;
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}
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/* if we still have any pages to update we do so now */
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if (h >= yres)
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/* its a full screen update, just do it */
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par->update_all(par);
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else
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par->update_partial(par, y1, min((u16) (y1 + h), yres));
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out:
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pm_runtime_mark_last_busy(info->device);
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pm_runtime_put_autosuspend(info->device);
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}
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/*
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* framebuffer operations
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*/
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/*
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* this is the slow path from userspace. they can seek and write to
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* the fb. it's inefficient to do anything less than a full screen draw
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*/
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static ssize_t auok190xfb_write(struct fb_info *info, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct auok190xfb_par *par = info->par;
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unsigned long p = *ppos;
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void *dst;
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int err = 0;
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unsigned long total_size;
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if (info->state != FBINFO_STATE_RUNNING)
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return -EPERM;
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total_size = info->fix.smem_len;
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if (p > total_size)
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return -EFBIG;
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if (count > total_size) {
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err = -EFBIG;
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count = total_size;
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}
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if (count + p > total_size) {
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if (!err)
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err = -ENOSPC;
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count = total_size - p;
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}
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dst = (void *)(info->screen_base + p);
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if (copy_from_user(dst, buf, count))
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err = -EFAULT;
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if (!err)
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*ppos += count;
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par->update_all(par);
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return (err) ? err : count;
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}
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static void auok190xfb_fillrect(struct fb_info *info,
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const struct fb_fillrect *rect)
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{
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struct auok190xfb_par *par = info->par;
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sys_fillrect(info, rect);
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par->update_all(par);
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}
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static void auok190xfb_copyarea(struct fb_info *info,
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const struct fb_copyarea *area)
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{
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struct auok190xfb_par *par = info->par;
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sys_copyarea(info, area);
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par->update_all(par);
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}
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static void auok190xfb_imageblit(struct fb_info *info,
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const struct fb_image *image)
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{
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struct auok190xfb_par *par = info->par;
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sys_imageblit(info, image);
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par->update_all(par);
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}
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static int auok190xfb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct device *dev = info->device;
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struct auok190xfb_par *par = info->par;
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struct panel_info *panel = &panel_table[par->resolution];
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int size;
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/*
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* Color depth
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*/
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if (var->bits_per_pixel == 8 && var->grayscale == 1) {
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/*
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* For 8-bit grayscale, R, G, and B offset are equal.
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*/
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var->red.length = 8;
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var->red.offset = 0;
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var->red.msb_right = 0;
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var->green.length = 8;
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var->green.offset = 0;
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var->green.msb_right = 0;
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var->blue.length = 8;
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var->blue.offset = 0;
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var->blue.msb_right = 0;
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var->transp.length = 0;
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var->transp.offset = 0;
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var->transp.msb_right = 0;
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} else if (var->bits_per_pixel == 16) {
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var->red.length = 5;
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var->red.offset = 11;
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var->red.msb_right = 0;
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var->green.length = 6;
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var->green.offset = 5;
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var->green.msb_right = 0;
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var->blue.length = 5;
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var->blue.offset = 0;
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var->blue.msb_right = 0;
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var->transp.length = 0;
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var->transp.offset = 0;
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var->transp.msb_right = 0;
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} else {
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dev_warn(dev, "unsupported color mode (bits: %d, grayscale: %d)\n",
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info->var.bits_per_pixel, info->var.grayscale);
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return -EINVAL;
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}
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/*
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* Dimensions
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*/
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switch (var->rotate) {
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case FB_ROTATE_UR:
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case FB_ROTATE_UD:
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var->xres = panel->w;
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var->yres = panel->h;
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break;
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case FB_ROTATE_CW:
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case FB_ROTATE_CCW:
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var->xres = panel->h;
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var->yres = panel->w;
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break;
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default:
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dev_dbg(dev, "Invalid rotation request\n");
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|
return -EINVAL;
|
|
}
|
|
|
|
var->xres_virtual = var->xres;
|
|
var->yres_virtual = var->yres;
|
|
|
|
/*
|
|
* Memory limit
|
|
*/
|
|
|
|
size = var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8;
|
|
if (size > info->fix.smem_len) {
|
|
dev_err(dev, "Memory limit exceeded, requested %dK\n",
|
|
size >> 10);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int auok190xfb_set_fix(struct fb_info *info)
|
|
{
|
|
struct fb_fix_screeninfo *fix = &info->fix;
|
|
struct fb_var_screeninfo *var = &info->var;
|
|
|
|
fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
|
|
|
|
fix->type = FB_TYPE_PACKED_PIXELS;
|
|
fix->accel = FB_ACCEL_NONE;
|
|
fix->visual = (var->grayscale) ? FB_VISUAL_STATIC_PSEUDOCOLOR
|
|
: FB_VISUAL_TRUECOLOR;
|
|
fix->xpanstep = 0;
|
|
fix->ypanstep = 0;
|
|
fix->ywrapstep = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int auok190xfb_set_par(struct fb_info *info)
|
|
{
|
|
struct auok190xfb_par *par = info->par;
|
|
|
|
par->rotation = info->var.rotate;
|
|
auok190xfb_set_fix(info);
|
|
|
|
/* reinit the controller to honor the rotation */
|
|
par->init(par);
|
|
|
|
/* wait for init to complete */
|
|
par->board->wait_for_rdy(par);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops auok190xfb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_read = fb_sys_read,
|
|
.fb_write = auok190xfb_write,
|
|
.fb_fillrect = auok190xfb_fillrect,
|
|
.fb_copyarea = auok190xfb_copyarea,
|
|
.fb_imageblit = auok190xfb_imageblit,
|
|
.fb_check_var = auok190xfb_check_var,
|
|
.fb_set_par = auok190xfb_set_par,
|
|
};
|
|
|
|
/*
|
|
* Controller-functions common to both K1900 and K1901
|
|
*/
|
|
|
|
static int auok190x_read_temperature(struct auok190xfb_par *par)
|
|
{
|
|
struct device *dev = par->info->device;
|
|
u16 data[4];
|
|
int temp;
|
|
|
|
pm_runtime_get_sync(dev);
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
|
|
auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data);
|
|
|
|
mutex_unlock(&(par->io_lock));
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
|
|
/* sanitize and split of half-degrees for now */
|
|
temp = ((data[0] & AUOK190X_VERSION_TEMP_MASK) >> 1);
|
|
|
|
/* handle positive and negative temperatures */
|
|
if (temp >= 201)
|
|
return (255 - temp + 1) * (-1);
|
|
else
|
|
return temp;
|
|
}
|
|
|
|
static void auok190x_identify(struct auok190xfb_par *par)
|
|
{
|
|
struct device *dev = par->info->device;
|
|
u16 data[4];
|
|
|
|
pm_runtime_get_sync(dev);
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
|
|
auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data);
|
|
|
|
mutex_unlock(&(par->io_lock));
|
|
|
|
par->epd_type = data[1] & AUOK190X_VERSION_TEMP_MASK;
|
|
|
|
par->panel_size_int = AUOK190X_VERSION_SIZE_INT(data[2]);
|
|
par->panel_size_float = AUOK190X_VERSION_SIZE_FLOAT(data[2]);
|
|
par->panel_model = AUOK190X_VERSION_MODEL(data[2]);
|
|
|
|
par->tcon_version = AUOK190X_VERSION_TCON(data[3]);
|
|
par->lut_version = AUOK190X_VERSION_LUT(data[3]);
|
|
|
|
dev_dbg(dev, "panel %d.%din, model 0x%x, EPD 0x%x TCON-rev 0x%x, LUT-rev 0x%x",
|
|
par->panel_size_int, par->panel_size_float, par->panel_model,
|
|
par->epd_type, par->tcon_version, par->lut_version);
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
}
|
|
|
|
/*
|
|
* Sysfs functions
|
|
*/
|
|
|
|
static ssize_t update_mode_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct auok190xfb_par *par = info->par;
|
|
|
|
return sprintf(buf, "%d\n", par->update_mode);
|
|
}
|
|
|
|
static ssize_t update_mode_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct auok190xfb_par *par = info->par;
|
|
int mode, ret;
|
|
|
|
ret = kstrtoint(buf, 10, &mode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
par->update_mode = mode;
|
|
|
|
/* if we enter a better mode, do a full update */
|
|
if (par->last_mode > 1 && mode < par->last_mode)
|
|
par->update_all(par);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t flash_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct auok190xfb_par *par = info->par;
|
|
|
|
return sprintf(buf, "%d\n", par->flash);
|
|
}
|
|
|
|
static ssize_t flash_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct auok190xfb_par *par = info->par;
|
|
int flash, ret;
|
|
|
|
ret = kstrtoint(buf, 10, &flash);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (flash > 0)
|
|
par->flash = 1;
|
|
else
|
|
par->flash = 0;
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct auok190xfb_par *par = info->par;
|
|
int temp;
|
|
|
|
temp = auok190x_read_temperature(par);
|
|
return sprintf(buf, "%d\n", temp);
|
|
}
|
|
|
|
static DEVICE_ATTR(update_mode, 0644, update_mode_show, update_mode_store);
|
|
static DEVICE_ATTR(flash, 0644, flash_show, flash_store);
|
|
static DEVICE_ATTR(temp, 0644, temp_show, NULL);
|
|
|
|
static struct attribute *auok190x_attributes[] = {
|
|
&dev_attr_update_mode.attr,
|
|
&dev_attr_flash.attr,
|
|
&dev_attr_temp.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group auok190x_attr_group = {
|
|
.attrs = auok190x_attributes,
|
|
};
|
|
|
|
static int auok190x_power(struct auok190xfb_par *par, bool on)
|
|
{
|
|
struct auok190x_board *board = par->board;
|
|
int ret;
|
|
|
|
if (on) {
|
|
/* We should maintain POWER up for at least 80ms before set
|
|
* RST_N and SLP_N to high (TCON spec 20100803_v35 p59)
|
|
*/
|
|
ret = regulator_enable(par->regulator);
|
|
if (ret)
|
|
return ret;
|
|
|
|
msleep(200);
|
|
gpio_set_value(board->gpio_nrst, 1);
|
|
gpio_set_value(board->gpio_nsleep, 1);
|
|
msleep(200);
|
|
} else {
|
|
regulator_disable(par->regulator);
|
|
gpio_set_value(board->gpio_nrst, 0);
|
|
gpio_set_value(board->gpio_nsleep, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Recovery - powercycle the controller
|
|
*/
|
|
|
|
static void auok190x_recover(struct auok190xfb_par *par)
|
|
{
|
|
struct device *dev = par->info->device;
|
|
|
|
auok190x_power(par, 0);
|
|
msleep(100);
|
|
auok190x_power(par, 1);
|
|
|
|
/* after powercycling the device, it's always active */
|
|
pm_runtime_set_active(dev);
|
|
par->standby = 0;
|
|
|
|
par->init(par);
|
|
|
|
/* wait for init to complete */
|
|
par->board->wait_for_rdy(par);
|
|
}
|
|
|
|
/*
|
|
* Power-management
|
|
*/
|
|
static int __maybe_unused auok190x_runtime_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct auok190xfb_par *par = info->par;
|
|
struct auok190x_board *board = par->board;
|
|
u16 standby_param;
|
|
|
|
/* take and keep the lock until we are resumed, as the controller
|
|
* will never reach the non-busy state when in standby mode
|
|
*/
|
|
mutex_lock(&(par->io_lock));
|
|
|
|
if (par->standby) {
|
|
dev_warn(dev, "already in standby, runtime-pm pairing mismatch\n");
|
|
mutex_unlock(&(par->io_lock));
|
|
return 0;
|
|
}
|
|
|
|
/* according to runtime_pm.txt runtime_suspend only means, that the
|
|
* device will not process data and will not communicate with the CPU
|
|
* As we hold the lock, this stays true even without standby
|
|
*/
|
|
if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
|
|
dev_dbg(dev, "runtime suspend without standby\n");
|
|
goto finish;
|
|
} else if (board->quirks & AUOK190X_QUIRK_STANDBYPARAM) {
|
|
/* for some TCON versions STANDBY expects a parameter (0) but
|
|
* it seems the real tcon version has to be determined yet.
|
|
*/
|
|
dev_dbg(dev, "runtime suspend with additional empty param\n");
|
|
standby_param = 0;
|
|
auok190x_send_cmdargs(par, AUOK190X_CMD_STANDBY, 1,
|
|
&standby_param);
|
|
} else {
|
|
dev_dbg(dev, "runtime suspend without param\n");
|
|
auok190x_send_command(par, AUOK190X_CMD_STANDBY);
|
|
}
|
|
|
|
msleep(64);
|
|
|
|
finish:
|
|
par->standby = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused auok190x_runtime_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct auok190xfb_par *par = info->par;
|
|
struct auok190x_board *board = par->board;
|
|
|
|
if (!par->standby) {
|
|
dev_warn(dev, "not in standby, runtime-pm pairing mismatch\n");
|
|
return 0;
|
|
}
|
|
|
|
if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
|
|
dev_dbg(dev, "runtime resume without standby\n");
|
|
} else {
|
|
/* when in standby, controller is always busy
|
|
* and only accepts the wakeup command
|
|
*/
|
|
dev_dbg(dev, "runtime resume from standby\n");
|
|
auok190x_send_command_nowait(par, AUOK190X_CMD_WAKEUP);
|
|
|
|
msleep(160);
|
|
|
|
/* wait for the controller to be ready and release the lock */
|
|
board->wait_for_rdy(par);
|
|
}
|
|
|
|
par->standby = 0;
|
|
|
|
mutex_unlock(&(par->io_lock));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused auok190x_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct auok190xfb_par *par = info->par;
|
|
struct auok190x_board *board = par->board;
|
|
int ret;
|
|
|
|
dev_dbg(dev, "suspend\n");
|
|
if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
|
|
/* suspend via powering off the ic */
|
|
dev_dbg(dev, "suspend with broken standby\n");
|
|
|
|
auok190x_power(par, 0);
|
|
} else {
|
|
dev_dbg(dev, "suspend using sleep\n");
|
|
|
|
/* the sleep state can only be entered from the standby state.
|
|
* pm_runtime_get_noresume gets called before the suspend call.
|
|
* So the devices usage count is >0 but it is not necessarily
|
|
* active.
|
|
*/
|
|
if (!pm_runtime_status_suspended(dev)) {
|
|
ret = auok190x_runtime_suspend(dev);
|
|
if (ret < 0) {
|
|
dev_err(dev, "auok190x_runtime_suspend failed with %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
par->manual_standby = 1;
|
|
}
|
|
|
|
gpio_direction_output(board->gpio_nsleep, 0);
|
|
}
|
|
|
|
msleep(100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused auok190x_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct auok190xfb_par *par = info->par;
|
|
struct auok190x_board *board = par->board;
|
|
|
|
dev_dbg(dev, "resume\n");
|
|
if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
|
|
dev_dbg(dev, "resume with broken standby\n");
|
|
|
|
auok190x_power(par, 1);
|
|
|
|
par->init(par);
|
|
} else {
|
|
dev_dbg(dev, "resume from sleep\n");
|
|
|
|
/* device should be in runtime suspend when we were suspended
|
|
* and pm_runtime_put_sync gets called after this function.
|
|
* So there is no need to touch the standby mode here at all.
|
|
*/
|
|
gpio_direction_output(board->gpio_nsleep, 1);
|
|
msleep(100);
|
|
|
|
/* an additional init call seems to be necessary after sleep */
|
|
auok190x_runtime_resume(dev);
|
|
par->init(par);
|
|
|
|
/* if we were runtime-suspended before, suspend again*/
|
|
if (!par->manual_standby)
|
|
auok190x_runtime_suspend(dev);
|
|
else
|
|
par->manual_standby = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct dev_pm_ops auok190x_pm = {
|
|
SET_RUNTIME_PM_OPS(auok190x_runtime_suspend, auok190x_runtime_resume,
|
|
NULL)
|
|
SET_SYSTEM_SLEEP_PM_OPS(auok190x_suspend, auok190x_resume)
|
|
};
|
|
EXPORT_SYMBOL_GPL(auok190x_pm);
|
|
|
|
/*
|
|
* Common probe and remove code
|
|
*/
|
|
|
|
int auok190x_common_probe(struct platform_device *pdev,
|
|
struct auok190x_init_data *init)
|
|
{
|
|
struct auok190x_board *board = init->board;
|
|
struct auok190xfb_par *par;
|
|
struct fb_info *info;
|
|
struct panel_info *panel;
|
|
int videomemorysize, ret;
|
|
unsigned char *videomemory;
|
|
|
|
/* check board contents */
|
|
if (!board->init || !board->cleanup || !board->wait_for_rdy
|
|
|| !board->set_ctl || !board->set_hdb || !board->get_hdb
|
|
|| !board->setup_irq)
|
|
return -EINVAL;
|
|
|
|
info = framebuffer_alloc(sizeof(struct auok190xfb_par), &pdev->dev);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
par = info->par;
|
|
par->info = info;
|
|
par->board = board;
|
|
par->recover = auok190x_recover;
|
|
par->update_partial = init->update_partial;
|
|
par->update_all = init->update_all;
|
|
par->need_refresh = init->need_refresh;
|
|
par->init = init->init;
|
|
|
|
/* init update modes */
|
|
par->update_cnt = 0;
|
|
par->update_mode = -1;
|
|
par->last_mode = -1;
|
|
par->flash = 0;
|
|
|
|
par->regulator = regulator_get(info->device, "vdd");
|
|
if (IS_ERR(par->regulator)) {
|
|
ret = PTR_ERR(par->regulator);
|
|
dev_err(info->device, "Failed to get regulator: %d\n", ret);
|
|
goto err_reg;
|
|
}
|
|
|
|
ret = board->init(par);
|
|
if (ret) {
|
|
dev_err(info->device, "board init failed, %d\n", ret);
|
|
goto err_board;
|
|
}
|
|
|
|
ret = gpio_request(board->gpio_nsleep, "AUOK190x sleep");
|
|
if (ret) {
|
|
dev_err(info->device, "could not request sleep gpio, %d\n",
|
|
ret);
|
|
goto err_gpio1;
|
|
}
|
|
|
|
ret = gpio_direction_output(board->gpio_nsleep, 0);
|
|
if (ret) {
|
|
dev_err(info->device, "could not set sleep gpio, %d\n", ret);
|
|
goto err_gpio2;
|
|
}
|
|
|
|
ret = gpio_request(board->gpio_nrst, "AUOK190x reset");
|
|
if (ret) {
|
|
dev_err(info->device, "could not request reset gpio, %d\n",
|
|
ret);
|
|
goto err_gpio2;
|
|
}
|
|
|
|
ret = gpio_direction_output(board->gpio_nrst, 0);
|
|
if (ret) {
|
|
dev_err(info->device, "could not set reset gpio, %d\n", ret);
|
|
goto err_gpio3;
|
|
}
|
|
|
|
ret = auok190x_power(par, 1);
|
|
if (ret) {
|
|
dev_err(info->device, "could not power on the device, %d\n",
|
|
ret);
|
|
goto err_gpio3;
|
|
}
|
|
|
|
mutex_init(&par->io_lock);
|
|
|
|
init_waitqueue_head(&par->waitq);
|
|
|
|
ret = par->board->setup_irq(par->info);
|
|
if (ret) {
|
|
dev_err(info->device, "could not setup ready-irq, %d\n", ret);
|
|
goto err_irq;
|
|
}
|
|
|
|
/* wait for init to complete */
|
|
par->board->wait_for_rdy(par);
|
|
|
|
/*
|
|
* From here on the controller can talk to us
|
|
*/
|
|
|
|
/* initialise fix, var, resolution and rotation */
|
|
|
|
strlcpy(info->fix.id, init->id, 16);
|
|
info->var.bits_per_pixel = 8;
|
|
info->var.grayscale = 1;
|
|
|
|
panel = &panel_table[board->resolution];
|
|
|
|
par->resolution = board->resolution;
|
|
par->rotation = 0;
|
|
|
|
/* videomemory handling */
|
|
|
|
videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE);
|
|
videomemory = vmalloc(videomemorysize);
|
|
if (!videomemory) {
|
|
ret = -ENOMEM;
|
|
goto err_irq;
|
|
}
|
|
|
|
memset(videomemory, 0, videomemorysize);
|
|
info->screen_base = (char *)videomemory;
|
|
info->fix.smem_len = videomemorysize;
|
|
|
|
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
|
|
info->fbops = &auok190xfb_ops;
|
|
|
|
ret = auok190xfb_check_var(&info->var, info);
|
|
if (ret)
|
|
goto err_defio;
|
|
|
|
auok190xfb_set_fix(info);
|
|
|
|
/* deferred io init */
|
|
|
|
info->fbdefio = devm_kzalloc(info->device,
|
|
sizeof(struct fb_deferred_io),
|
|
GFP_KERNEL);
|
|
if (!info->fbdefio) {
|
|
dev_err(info->device, "Failed to allocate memory\n");
|
|
ret = -ENOMEM;
|
|
goto err_defio;
|
|
}
|
|
|
|
dev_dbg(info->device, "targeting %d frames per second\n", board->fps);
|
|
info->fbdefio->delay = HZ / board->fps;
|
|
info->fbdefio->first_io = auok190xfb_dpy_first_io,
|
|
info->fbdefio->deferred_io = auok190xfb_dpy_deferred_io,
|
|
fb_deferred_io_init(info);
|
|
|
|
/* color map */
|
|
|
|
ret = fb_alloc_cmap(&info->cmap, 256, 0);
|
|
if (ret < 0) {
|
|
dev_err(info->device, "Failed to allocate colormap\n");
|
|
goto err_cmap;
|
|
}
|
|
|
|
/* controller init */
|
|
|
|
par->consecutive_threshold = 100;
|
|
par->init(par);
|
|
auok190x_identify(par);
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
ret = register_framebuffer(info);
|
|
if (ret < 0)
|
|
goto err_regfb;
|
|
|
|
ret = sysfs_create_group(&info->device->kobj, &auok190x_attr_group);
|
|
if (ret)
|
|
goto err_sysfs;
|
|
|
|
dev_info(info->device, "fb%d: %dx%d using %dK of video memory\n",
|
|
info->node, info->var.xres, info->var.yres,
|
|
videomemorysize >> 10);
|
|
|
|
/* increase autosuspend_delay when we use alternative methods
|
|
* for runtime_pm
|
|
*/
|
|
par->autosuspend_delay = (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN)
|
|
? 1000 : 200;
|
|
|
|
pm_runtime_set_active(info->device);
|
|
pm_runtime_enable(info->device);
|
|
pm_runtime_set_autosuspend_delay(info->device, par->autosuspend_delay);
|
|
pm_runtime_use_autosuspend(info->device);
|
|
|
|
return 0;
|
|
|
|
err_sysfs:
|
|
unregister_framebuffer(info);
|
|
err_regfb:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
err_cmap:
|
|
fb_deferred_io_cleanup(info);
|
|
err_defio:
|
|
vfree((void *)info->screen_base);
|
|
err_irq:
|
|
auok190x_power(par, 0);
|
|
err_gpio3:
|
|
gpio_free(board->gpio_nrst);
|
|
err_gpio2:
|
|
gpio_free(board->gpio_nsleep);
|
|
err_gpio1:
|
|
board->cleanup(par);
|
|
err_board:
|
|
regulator_put(par->regulator);
|
|
err_reg:
|
|
framebuffer_release(info);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(auok190x_common_probe);
|
|
|
|
int auok190x_common_remove(struct platform_device *pdev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
struct auok190xfb_par *par = info->par;
|
|
struct auok190x_board *board = par->board;
|
|
|
|
pm_runtime_disable(info->device);
|
|
|
|
sysfs_remove_group(&info->device->kobj, &auok190x_attr_group);
|
|
|
|
unregister_framebuffer(info);
|
|
|
|
fb_dealloc_cmap(&info->cmap);
|
|
|
|
fb_deferred_io_cleanup(info);
|
|
|
|
vfree((void *)info->screen_base);
|
|
|
|
auok190x_power(par, 0);
|
|
|
|
gpio_free(board->gpio_nrst);
|
|
gpio_free(board->gpio_nsleep);
|
|
|
|
board->cleanup(par);
|
|
|
|
regulator_put(par->regulator);
|
|
|
|
framebuffer_release(info);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(auok190x_common_remove);
|
|
|
|
MODULE_DESCRIPTION("Common code for AUO-K190X controllers");
|
|
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
|
|
MODULE_LICENSE("GPL");
|