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/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include "sprdfb.h"
#include "sprdfb_panel.h"
#include "sprdfb_dispc_reg.h"
extern struct ops_i2c sprdfb_i2c_ops;
extern struct ops_spi sprdfb_spi_ops;
extern bool sprdfb_i2c_init(struct sprdfb_device *dev);
extern bool sprdfb_i2c_uninit(struct sprdfb_device *dev);
extern bool sprdfb_spi_init(struct sprdfb_device *dev);
extern bool sprdfb_spi_uninit(struct sprdfb_device *dev);
static uint32_t rgb_readid(struct panel_spec *self)
{
uint32_t id = 0;
struct info_rgb *rgb = self->info.rgb;
/* default id reg is 0 */
#ifdef CONFIG_I2C
if(SPRDFB_RGB_BUS_TYPE_I2C == rgb->cmd_bus_mode){
rgb->bus_info.i2c->ops->i2c_read_16bits(0x0, false, (uint16_t*)&id, false);
} else
#endif
{
rgb->bus_info.spi->ops->spi_send_cmd(0x0);
rgb->bus_info.spi->ops->spi_read(&id);
}
return id;
}
static void rgb_dispc_init_config(struct panel_spec *panel)
{
uint32_t reg_val = dispc_read(DISPC_DPI_CTRL);
pr_debug("sprdfb: [%s]\n", __FUNCTION__);
if(NULL == panel){
printk(KERN_ERR "sprdfb: [%s] fail.(Invalid Param)\n", __FUNCTION__);
return;
}
if (SPRDFB_PANEL_TYPE_RGB != panel->type &&
SPRDFB_PANEL_TYPE_LVDS != panel->type) {
printk(KERN_ERR "sprdfb: [%s] fail.(not mcu panel)\n", __FUNCTION__);
return;
}
/*use dpi as interface*/
dispc_clear_bits((3<<1), DISPC_CTRL);
/*h sync pol*/
if(SPRDFB_POLARITY_NEG == panel->info.rgb->h_sync_pol){
reg_val |= (1<<0);
}
/*v sync pol*/
if(SPRDFB_POLARITY_NEG == panel->info.rgb->v_sync_pol){
reg_val |= (1<<1);
}
/*de sync pol*/
if(SPRDFB_POLARITY_NEG == panel->info.rgb->de_pol){
reg_val |= (1<<2);
}
#ifdef CONFIG_DPI_SINGLE_RUN
/*single run mode*/
reg_val |= (1<<3);
#endif
/*dpi bits*/
switch(panel->info.rgb->video_bus_width){
case 16:
break;
case 18:
reg_val |= (1 << 6);
break;
case 24:
reg_val |= (2 << 6);
break;
default:
break;
}
dispc_write(reg_val, DISPC_DPI_CTRL);
pr_debug("sprdfb: [%s] DISPC_DPI_CTRL = %d\n", __FUNCTION__, dispc_read(DISPC_DPI_CTRL));
}
static void rgb_dispc_set_timing(struct sprdfb_device *dev)
{
pr_debug("sprdfb: [%s]\n", __FUNCTION__);
dispc_write(dev->panel_timing.rgb_timing[RGB_LCD_H_TIMING], DISPC_DPI_H_TIMING);
dispc_write(dev->panel_timing.rgb_timing[RGB_LCD_V_TIMING], DISPC_DPI_V_TIMING);
}
uint32_t rgb_calc_h_timing(struct timing_rgb *timing)
{
#if 0
uint32_t clk_rate;
uint32_t hsync, hbp, hfp;
struct clk * clk = NULL;
if(NULL == timing){
printk(KERN_ERR "sprdfb: [%s]: Invalid Param\n", __FUNCTION__);
return 0;
}
clk_get(NULL,"clk_dispc_dpi");
clk_rate = clk_get_rate(clk) / 1000000;
pr_debug(KERN_INFO "sprdfb: [%s] clk_rate: 0x%x\n", __FUNCTION__, clk_rate);
/********************************************************
* we assume : t = ? ns, dispc_dpi = ? MHz so
* 1ns need cycle : dispc_dpi /1000
* tns need cycles : t * dispc_dpi / 1000
*
********************************************************/
#define MAX_DPI_HSYNC_TIMING_VALUE 255
#define MAX_DPI_HBP_TIMING_VALUE 4095
#define MAX_DPI_HFP_TIMING_VALUE 4095
#define DPI_CYCLES(ns) (( (ns) * clk_rate + 1000 - 1)/ 1000)
/* ceiling*/
hsync = DPI_CYCLES(timing->hsync);
if (hsync > MAX_DPI_HSYNC_TIMING_VALUE) {
hsync = MAX_DPI_HSYNC_TIMING_VALUE ;
}
hbp = DPI_CYCLES(timing->hbp);
if (hbp > MAX_DPI_HSYNC_TIMING_VALUE) {
hbp = MAX_DPI_HSYNC_TIMING_VALUE ;
}
hfp = DPI_CYCLES (timing->hfp);
if (hfp > MAX_DPI_HFP_TIMING_VALUE) {
hfp = MAX_DPI_HFP_TIMING_VALUE ;
}
return (hsync | (hbp << 8) | (hfp << 20));
#else
return (timing->hsync | (timing->hbp << 8) | (timing->hfp << 20));
#endif
}
uint32_t rgb_calc_v_timing(struct timing_rgb *timing)
{
return (timing->vsync| (timing->vbp << 8) | (timing->vfp << 20));
}
static int32_t sprdfb_rgb_panel_check(struct panel_spec *panel)
{
if(NULL == panel){
printk("sprdfb: [%s] fail. (Invalid param)\n", __FUNCTION__);
return false;
}
if(SPRDFB_PANEL_TYPE_RGB != panel->type &&
SPRDFB_PANEL_TYPE_LVDS != panel->type) {
printk("sprdfb: [%s] fail. (not rgb or lvds param)\n", __FUNCTION__);
return false;
}
pr_debug("sprdfb: [%s]\n",__FUNCTION__);
return true;
}
static void sprdfb_rgb_panel_mount(struct sprdfb_device *dev)
{
if((NULL == dev) || (NULL == dev->panel)){
printk(KERN_ERR "sprdfb: [%s]: Invalid Param\n", __FUNCTION__);
return;
}
pr_debug(KERN_INFO "sprdfb: [%s], dev_id = %d\n",__FUNCTION__, dev->dev_id);
dev->panel_if_type = SPRDFB_PANEL_IF_DPI;
if(SPRDFB_RGB_BUS_TYPE_I2C == dev->panel->info.rgb->cmd_bus_mode){
dev->panel->info.rgb->bus_info.i2c->ops = &sprdfb_i2c_ops;
} else {
if (dev->panel->info.rgb->bus_info.spi)
dev->panel->info.rgb->bus_info.spi->ops = &sprdfb_spi_ops;
}
if(NULL == dev->panel->ops->panel_readid){
dev->panel->ops->panel_readid = rgb_readid;
}
dev->panel_timing.rgb_timing[RGB_LCD_H_TIMING] = rgb_calc_h_timing(dev->panel->info.rgb->timing);
dev->panel_timing.rgb_timing[RGB_LCD_V_TIMING] = rgb_calc_v_timing(dev->panel->info.rgb->timing);
}
static bool sprdfb_rgb_panel_init(struct sprdfb_device *dev)
{
bool ret = false;
if(SPRDFB_RGB_BUS_TYPE_I2C == dev->panel->info.rgb->cmd_bus_mode){
ret = sprdfb_i2c_init(dev);
}else if (SPRDFB_RGB_BUS_TYPE_SPI == dev->panel->info.rgb->cmd_bus_mode) {
ret = sprdfb_spi_init(dev);
}
if (dev->panel->info.rgb->cmd_bus_mode == SPRDFB_RGB_BUS_TYPE_LVDS) {
ret = true;
}
if(!ret) {
printk(KERN_ERR "sprdfb: [%s]: bus init fail!\n", __FUNCTION__);
return false;
}
rgb_dispc_init_config(dev->panel);
rgb_dispc_set_timing(dev);
if(! dev->panel_ready){
/*Nt35516 need vsync before panel init*/
dispc_set_bits(BIT(4), DISPC_CTRL);
udelay(100);
dispc_clear_bits(BIT(4), DISPC_CTRL);
}
#ifdef SPRDFB_SUPPORT_LVDS_PANEL
if (dev->panel->type == SPRDFB_PANEL_TYPE_LVDS) {
pr_info("sprdfb: [%s]: Now initialize LVDS mode\n", __FUNCTION__);
/* bit[16] clk from LVDS TX (need set when in LVDS mode) */
__raw_writel(BIT(16), REG_AP_CLK_DISPC0_DPI_CFG);
/* a4, bit[0]: LVDS AP select */
/* 60, bit[0]: LVDS TX power down (active '1') */
__raw_writel(BIT(0), REG_PMU_APB_LVDSDIS_PLL_REL_CFG);
__raw_writel(BIT(0), REG_AON_APB_LVDS_CFG);
/* '0': R/G/B[1:0] sent by lan3; '1': RGB[7:6] sent by lan3 */
dispc_set_bits(BIT(21), DISPC_CTRL + 0x18);
}
#endif
return true;
}
static void sprdfb_rgb_panel_uninit(struct sprdfb_device *dev)
{
if (SPRDFB_RGB_BUS_TYPE_I2C == dev->panel->info.rgb->cmd_bus_mode) {
sprdfb_i2c_uninit(dev);
} else if (SPRDFB_RGB_BUS_TYPE_SPI == dev->panel->info.rgb->cmd_bus_mode) {
sprdfb_spi_uninit(dev);
}
}
struct panel_if_ctrl sprdfb_rgb_ctrl = {
.if_name = "rgb",
.panel_if_check = sprdfb_rgb_panel_check,
.panel_if_mount = sprdfb_rgb_panel_mount,
.panel_if_init = sprdfb_rgb_panel_init,
.panel_if_uninit = sprdfb_rgb_panel_uninit,
.panel_if_before_refresh = NULL,
.panel_if_after_refresh = NULL,
};
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