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nuttx/arch/arm/src/lpc54xx/lpc54_lcd.c

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/****************************************************************************
* arch/arm/src/lpc54xx/lpc54_lcd.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* This driver derives from the LPC1788 LCD driver. The LPC1788 LCD is
* identical tot he LPC54628 LCD other than some minor clocking differences.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/video/fb.h>
#include "up_arch.h"
#include "chip/lpc54_syscon.h"
#include "chip/lpc54_pinmux.h"
#include "lpc54_config.h"
#include "lpc54_enableclk.h"
#include "lpc54_gpio.h"
#include "lpc54_reset.h"
#include "lpc54_lcd.h"
#include <arch/board/board.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define LPC54_LCD_CLK_PER_LINE \
(CONFIG_LPC54_LCD_HWIDTH + CONFIG_LPC54_LCD_HPULSE + \
CONFIG_LPC54_LCD_HFRONTPORCH + CONFIG_LPC54_LCD_HBACKPORCH)
#define LPC54_LCD_LINES_PER_FRAME \
(CONFIG_LPC54_LCD_VHEIGHT + CONFIG_LPC54_LCD_VPULSE + \
CONFIG_LPC54_LCD_VFRONTPORCH + CONFIG_LPC54_LCD_VBACKPORCH)
#define LPC54_LCD_PIXEL_CLOCK \
(LPC54_LCD_CLK_PER_LINE * LPC54_LCD_LINES_PER_FRAME * \
CONFIG_LPC54_LCD_REFRESH_FREQ)
/* Framebuffer characteristics in bytes */
#define LPC54_STRIDE ((CONFIG_LPC54_LCD_HWIDTH * LPC54_BPP + 7) / 8)
#define LPC54_FBSIZE (LPC54_STRIDE * CONFIG_LPC54_LCD_VHEIGHT)
/* Delays */
#define LPC54_LCD_PWRDIS_DELAY 10000
#define LPC54_LCD_PWREN_DELAY 10000
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Get information about the video controller configuration and the
* configuration of each color plane.
*/
static int lpc54_getvideoinfo(FAR struct fb_vtable_s *vtable,
FAR struct fb_videoinfo_s *vinfo);
static int lpc54_getplaneinfo(FAR struct fb_vtable_s *vtable, int planeno,
FAR struct fb_planeinfo_s *pinfo);
/* The following is provided only if the video hardware supports RGB color
* mapping
*/
#ifdef CONFIG_FB_CMAP
static int lpc54_getcmap(FAR struct fb_vtable_s *vtable,
FAR struct fb_cmap_s *cmap);
static int lpc54_putcmap(FAR struct fb_vtable_s *vtable,
FAR const struct fb_cmap_s *cmap);
#endif
/* The following is provided only if the video hardware supports a hardware
* cursor
*/
#ifdef CONFIG_FB_HWCURSOR
static int lpc54_getcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_cursorattrib_s *attrib);
static int lpc54_setcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_setcursor_s *settings);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/* This structure describes the video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = LPC54_COLOR_FMT,
.xres = CONFIG_LPC54_LCD_HWIDTH,
.yres = CONFIG_LPC54_LCD_VHEIGHT,
.nplanes = 1,
};
/* This structure describes the single color plane */
static const struct fb_planeinfo_s g_planeinfo =
{
.fbmem = (FAR void *)CONFIG_LPC54_LCD_VRAMBASE,
.fblen = LPC54_FBSIZE,
.stride = LPC54_STRIDE,
.display = 0,
.bpp = LPC54_BPP,
};
/* Current cursor position */
#ifdef CONFIG_FB_HWCURSOR
static struct fb_cursorpos_s g_cpos;
/* Current cursor size */
#ifdef CONFIG_FB_HWCURSORSIZE
static struct fb_cursorsize_s g_csize;
#endif
#endif
/* The framebuffer object -- There is no private state information in this
* framebuffer driver.
*/
struct fb_vtable_s g_fbobject =
{
.getvideoinfo = lpc54_getvideoinfo,
.getplaneinfo = lpc54_getplaneinfo,
#ifdef CONFIG_FB_CMAP
.getcmap = lpc54_getcmap,
.putcmap = lpc54_putcmap,
#endif
#ifdef CONFIG_FB_HWCURSOR
.getcursor = lpc54_getcursor,
.setcursor = lpc54_setcursor,
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lpc54_getvideoinfo
****************************************************************************/
static int lpc54_getvideoinfo(FAR struct fb_vtable_s *vtable,
FAR struct fb_videoinfo_s *vinfo)
{
lcdinfo("vtable=%p vinfo=%p\n", vtable, vinfo);
if (vtable && vinfo)
{
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
return OK;
}
lcderr("ERROR: Returning EINVAL\n");
return -EINVAL;
}
/****************************************************************************
* Name: lpc54_getplaneinfo
****************************************************************************/
static int lpc54_getplaneinfo(FAR struct fb_vtable_s *vtable, int planeno,
FAR struct fb_planeinfo_s *pinfo)
{
lcdinfo("vtable=%p planeno=%d pinfo=%p\n", vtable, planeno, pinfo);
if (vtable && planeno == 0 && pinfo)
{
memcpy(pinfo, &g_planeinfo, sizeof(struct fb_planeinfo_s));
return OK;
}
lcderr("ERROR: Returning EINVAL\n");
return -EINVAL;
}
/****************************************************************************
* Name: lpc54_getcmap
****************************************************************************/
#ifdef CONFIG_FB_CMAP
static int lpc54_getcmap(FAR struct fb_vtable_s *vtable,
FAR struct fb_cmap_s *cmap)
{
uint32_t *pal;
uint32_t rgb;
int last;
int i;
lcdinfo("vtable=%p cmap=%p first=%d len=%d\n",
vtable, cmap, cmap->first, cmap->len);
DEBUGASSERT(vtable && cmap &&
cmap->first < 256 && (cmap->first + cmap->len) < 256);
pal = (uint32_t *)LPC54_LCD_PAL(cmap->first >> 1);
last = cmap->first + cmap->len;
/* Handle the case where the first color starts on an odd boundary */
i = cmap->first;
if ((i & 1) != 0)
{
rgb = *pal++;
i++;
/* Save the odd palette value */
cmap->red[i] = (rgb & LCD_PAL_R1_MASK) >> LCD_PAL_R1_SHIFT;
cmap->green[i] = (rgb & LCD_PAL_G1_MASK) >> LCD_PAL_G1_SHIFT;
cmap->blue[i] = (rgb & LCD_PAL_B1_MASK) >> LCD_PAL_B1_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i] = 0;
#endif
}
/* Handle even colors */
for (; i < last; i += 2)
{
rgb = *pal++;
/* Save the even palette value */
cmap->red[i] = (rgb & LCD_PAL_R0_MASK) >> LCD_PAL_R0_SHIFT;
cmap->green[i] = (rgb & LCD_PAL_G0_MASK) >> LCD_PAL_G0_SHIFT;
cmap->blue[i] = (rgb & LCD_PAL_B0_MASK) >> LCD_PAL_B0_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i] = 0;
#endif
/* Handle the case where the len ends on an odd boudary */
if ((i + 1) < last)
{
/* Save the even palette value */
cmap->red[i+1] = (rgb & LCD_PAL_R1_MASK) >> LCD_PAL_R1_SHIFT;
cmap->green[i+1] = (rgb & LCD_PAL_G1_MASK) >> LCD_PAL_G1_SHIFT;
cmap->blue[i+1] = (rgb & LCD_PAL_B1_MASK) >> LCD_PAL_B1_SHIFT;
#ifdef CONFIG_FB_TRANSPARENCY
cmap->transp[i+1] = 0;
#endif
}
}
return OK;
}
#endif
/****************************************************************************
* Name: lpc54_putcmap
****************************************************************************/
#ifdef CONFIG_FB_CMAP
static int lpc54_putcmap(FAR struct fb_vtable_s *vtable,
FAR const struct fb_cmap_s *cmap)
{
uint32_t *pal;
uint32_t rgb0;
uint32_t rgb1;
int last;
int i;
lcdinfo("vtable=%p cmap=%p first=%d len=%d\n",
vtable, cmap, cmap->first, cmap->len);
DEBUGASSERT(vtable && cmap);
pal = (uint32_t *)LPC54_LCD_PAL(cmap->first >> 1);
last = cmap->first + cmap->len;
/* Handle the case where the first color starts on an odd boundary */
i = cmap->first;
if ((i & 1) != 0)
{
rgb0 = *pal;
rgb0 &= (LCD_PAL_R0_MASK | LCD_PAL_G0_MASK | LCD_PAL_B0_MASK | LCD_PAL_I0);
rgb1 |= ((uint32_t)cmap->red[i] << LCD_PAL_R0_SHIFT |
(uint32_t)cmap->green[i] << LCD_PAL_G0_SHIFT |
(uint32_t)cmap->blue[i] << LCD_PAL_B0_SHIFT);
/* Save the new palette value */
*pal++ = (rgb0 | rgb1);
i++;
}
/* Handle even colors */
for (; i < last; i += 2)
{
uint32_t rgb0 = ((uint32_t)cmap->red[i] << LCD_PAL_R0_SHIFT |
(uint32_t)cmap->green[i] << LCD_PAL_G0_SHIFT |
(uint32_t)cmap->blue[i] << LCD_PAL_B0_SHIFT);
/* Handle the case where the len ends on an odd boudary */
if ((i + 1) >= last)
{
rgb1 = *pal;
rgb1 &= (LCD_PAL_R1_MASK | LCD_PAL_G1_MASK | LCD_PAL_B1_MASK | LCD_PAL_I1);
}
else
{
rgb1 = ((uint32_t)cmap->red[i+1] << LCD_PAL_R1_SHIFT |
(uint32_t)cmap->green[i+1] << LCD_PAL_G1_SHIFT |
(uint32_t)cmap->blue[i+1] << LCD_PAL_B1_SHIFT);
}
/* Save the new pallete value */
*pal++ = (rgb0 | rgb1);
}
return OK;
}
#endif
/****************************************************************************
* Name: lpc54_getcursor
****************************************************************************/
#ifdef CONFIG_FB_HWCURSOR
static int lpc54_getcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_cursorattrib_s *attrib)
{
lcdinfo("vtable=%p attrib=%p\n", vtable, attrib);
if (vtable && attrib)
{
#ifdef CONFIG_FB_HWCURSORIMAGE
attrib->fmt = LPC54_COLOR_FMT;
#endif
lcdinfo("pos: (x=%d, y=%d)\n", g_cpos.x, g_cpos.y);
attrib->pos = g_cpos;
#ifdef CONFIG_FB_HWCURSORSIZE
attrib->mxsize.h = CONFIG_LPC54_LCD_VHEIGHT;
attrib->mxsize.w = CONFIG_LPC54_LCD_HWIDTH;
lcdinfo("size: (h=%d, w=%d)\n", g_csize.h, g_csize.w);
attrib->size = g_csize;
#endif
return OK;
}
lcderr("ERROR: Returning EINVAL\n");
return -EINVAL;
}
#endif
/****************************************************************************
* Name: lpc54_setcursor
****************************************************************************/
#ifdef CONFIG_FB_HWCURSOR
static int lpc54_setcursor(FAR struct fb_vtable_s *vtable,
FAR struct fb_setcursor_s *settings)
{
lcdinfo("vtable=%p settings=%p\n", vtable, settings);
if (vtable && settings)
{
lcdinfo("flags: %02x\n", settings->flags);
if ((flags & FB_CUR_SETPOSITION) != 0)
{
g_cpos = settings->pos;
lcdinfo("pos: (h:%d, w:%d)\n", g_cpos.x, g_cpos.y);
}
#ifdef CONFIG_FB_HWCURSORSIZE
if ((flags & FB_CUR_SETSIZE) != 0)
{
g_csize = settings->size;
lcdinfo("size: (h:%d, w:%d)\n", g_csize.h, g_csize.w);
}
#endif
#ifdef CONFIG_FB_HWCURSORIMAGE
if ((flags & FB_CUR_SETIMAGE) != 0)
{
lcdinfo("image: (h:%d, w:%d) @ %p\n",
settings->img.height, settings->img.width,
settings->img.image);
}
#endif
return OK;
}
lcderr("ERROR: Returning EINVAL\n");
return -EINVAL;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_fbinitialize
*
* Description:
* Initialize the framebuffer video hardware associated with the display.
*
* Input parameters:
* display - In the case of hardware with multiple displays, this
* specifies the display. Normally this is zero.
*
* Returned Value:
* Zero is returned on success; a negated errno value is returned on any
* failure.
*
****************************************************************************/
int up_fbinitialize(int display)
{
uint32_t regval;
uint32_t bcd;
uint32_t pcd;
int i;
/* Configure pins */
/* LCD panel data. Pins used depend on the panel configuration:
*
* STN 4BPP: VD0-VD3 (single panel)
* VD0-VD3, VD8-VD11 (dual panel)
* STN 8BPP: VD0-VD7 (single panel)
* VD0-VD15 (dual panel)
* TFT 12BPP: VD4-VD7, VD12-VD15, VD20-VD23
* TFT 16BPP: VD3-VD7, VD10-VD15, VD19-VD23
* TFT 24BPP: VD0-VD23
*/
lcdinfo("Configuring pins\n");
#if !defined(CONFIG_LPC54_LCD_BPP16_565) && !defined(CONFIG_LPC54_LCD_BPP12_444)
lpc54_gpio_config(GPIO_LCD_VD0);
lpc54_gpio_config(GPIO_LCD_VD1);
lpc54_gpio_config(GPIO_LCD_VD2);
#endif
#ifndef CONFIG_LPC54_LCD_BPP12_444
lpc54_gpio_config(GPIO_LCD_VD3);
#endif
lpc54_gpio_config(GPIO_LCD_VD4);
lpc54_gpio_config(GPIO_LCD_VD5);
lpc54_gpio_config(GPIO_LCD_VD6);
lpc54_gpio_config(GPIO_LCD_VD7);
#if LPC54_BPP > 8 /* Or STN 8-BPP Dual panel */
#if !defined(CONFIG_LPC54_LCD_BPP16_565) && !defined(CONFIG_LPC54_LCD_BPP12_444)
lpc54_gpio_config(GPIO_LCD_VD8);
lpc54_gpio_config(GPIO_LCD_VD9);
#endif
#ifndef CONFIG_LPC54_LCD_BPP12_444
lpc54_gpio_config(GPIO_LCD_VD10);
lpc54_gpio_config(GPIO_LCD_VD11);
#endif
lpc54_gpio_config(GPIO_LCD_VD12);
lpc54_gpio_config(GPIO_LCD_VD13);
lpc54_gpio_config(GPIO_LCD_VD14);
lpc54_gpio_config(GPIO_LCD_VD15);
#endif
#if LPC54_BPP > 16 || defined(CONFIG_LPC54_LCD_TFTPANEL)
#if !defined(CONFIG_LPC54_LCD_BPP16_565) && !defined(CONFIG_LPC54_LCD_BPP12_444)
lpc54_gpio_config(GPIO_LCD_VD16);
lpc54_gpio_config(GPIO_LCD_VD17);
lpc54_gpio_config(GPIO_LCD_VD18);
#endif
#ifndef CONFIG_LPC54_LCD_BPP12_444
lpc54_gpio_config(GPIO_LCD_VD19);
#endif
lpc54_gpio_config(GPIO_LCD_VD20);
lpc54_gpio_config(GPIO_LCD_VD21);
lpc54_gpio_config(GPIO_LCD_VD22);
lpc54_gpio_config(GPIO_LCD_VD23);
#endif
/* Other pins */
lpc54_gpio_config(GPIO_LCD_AC); /* STN AC bias drive or TFT data enable output */
lpc54_gpio_config(GPIO_LCD_DCLK); /* LCD panel clock */
lpc54_gpio_config(GPIO_LCD_FP); /* Frame pulse (STN).
* Vertical synchronization pulse (TFT) */
lpc54_gpio_config(GPIO_LCD_LE); /* Line end signal */
lpc54_gpio_config(GPIO_LCD_LP); /* Line synchronization pulse (STN).
* Horizontal synchronization pulse (TFT) */
lpc54_gpio_config(GPIO_LCD_PWR); /* LCD panel power enable */
#ifdef CONFIG_LPC54_LCD_USE_CLKIN
lpc54_gpio_config(GPIO_LCD_CLKIN); /* Optional clock input */
#endif
lcdinfo("Enable clocking to the LCD controller\n");
/* Enable clocking to the LCD peripheral */
lpc54_lcd_enableclk();
/* Route Main clock (or LCK CLKIN) to the LCD. */
#ifdef CONFIG_LPC54_LCD_USE_CLKIN
putreg32(SYSCON_LCDCLKSEL_LCDCLKIN, LPC54_SYSCON_LCDCLKSEL);
#else
putreg32(SYSCON_LCDCLKSEL_MAINCLK, LPC54_SYSCON_LCDCLKSEL);
#endif
/* Set the LCD clock divider to one. */
putreg32(SYSCON_LCDCLKDIV_DIV(1), LPC54_SYSCON_LCDCLKDIV);
putreg32(SYSCON_LCDCLKDIV_DIV(1) | SYSCON_LCDCLKDIV_REQFLAG,
LPC54_SYSCON_LCDCLKDIV);
/* Reset the LCD */
lpc54_reset_lcd();
lcdinfo("Configuring the LCD controller\n");
/* Disable the cursor */
regval = getreg32(LPC54_LCD_CRSR_CRTL);
regval &= ~LCD_CRSR_CTRL_CRSON;
putreg32(regval, LPC54_LCD_CRSR_CRTL);
/* Clear any pending interrupts */
putreg32(LCD_INTCLR_ALL, LPC54_LCD_INTCLR);
/* Disable the LCD controller */
putreg32(0, LPC54_LCD_CTRL);
/* Set the bits per pixel */
regval = getreg32(LPC54_LCD_CTRL);
regval &= ~LCD_CTRL_LCDBPP_MASK;
#if defined(CONFIG_LPC54_LCD_BPP1)
regval |= LCD_CTRL_LCDBPP_1; /* 1 bpp */
#elif defined(CONFIG_LPC54_LCD_BPP2)
regval |= LCD_CTRL_LCDBPP_2; /* 2 bpp */
#elif defined(CONFIG_LPC54_LCD_BPP4)
regval |= LCD_CTRL_LCDBPP_4; /* 4 bpp */
#elif defined(CONFIG_LPC54_LCD_BPP8)
regval |= LCD_CTRL_LCDBPP_8; /* 8 bpp */
#elif defined(CONFIG_LPC54_LCD_BPP16)
regval |= LCD_CTRL_LCDBPP_16; /* 16 bpp */
#elif defined(CONFIG_LPC54_LCD_BPP24)
regval |= LCD_CTRL_LCDBPP_24; /* 24-bit TFT panel only */
#elif defined(CONFIG_LPC54_LCD_BPP16_565)
regval |= LCD_CTRL_LCDBPP_565; /* 16 bpp, 5:6:5 mode */
#else /* defined(CONFIG_LPC54_LCD_BPP12_444) */
regval |= LCD_CTRL_LCDBPP_444; /* 12 bpp, 4:4:4 mode */
#endif
#ifdef CONFIG_LPC54_LCD_TFTPANEL
/* TFT panel */
regval |= LCD_CTRL_LCDTFT;
#else
/* STN panel */
regval &= ~LCD_CTRL_LCDTFT;
#endif
#ifdef CONFIG_LPC54_LCD_BGR
/* Swap red and blue. The colors will be 0x00RRGGBB, not 0x00BBGGRR. */
regval |= LCD_CTRL_BGR;
#else
regval &= ~LCD_CTRL_BGR;
#endif
/* Single panel */
regval &= ~LCD_CTRL_LCDDUAL;
/* Select monochrome or color LCD */
#ifdef CONFIG_LPC54_LCD_MONOCHROME
/* Select monochrome LCD */
regval &= ~LCD_CTRL_BGR;
/* Select 4- or 8-bit monochrome interface */
#if LPC54_BPP > 4
regval |= LCD_CTRL_LCDMONO8;
#else
regval &= ~LCD_CTRL_LCDMONO8;
#endif
#else
/* Select color LCD */
regval &= ~(LCD_CTRL_LCDBW | LCD_CTRL_LCDMONO8);
#endif /* CONFIG_LPC54_LCD_MONOCHROME */
/* Little endian byte order */
regval &= ~LCD_CTRL_BEBO;
/* Little endian pixel order */
regval &= ~LCD_CTRL_BEPO;
putreg32(regval, LPC54_LCD_CTRL);
/* Initialize horizontal timing */
putreg32(0, LPC54_LCD_TIMH);
regval = (((CONFIG_LPC54_LCD_HWIDTH/16) - 1) << LCD_TIMH_PPL_SHIFT |
(CONFIG_LPC54_LCD_HPULSE - 1) << LCD_TIMH_HSW_SHIFT |
(CONFIG_LPC54_LCD_HFRONTPORCH - 1) << LCD_TIMH_HFP_SHIFT |
(CONFIG_LPC54_LCD_HBACKPORCH - 1) << LCD_TIMH_HBP_SHIFT);
putreg32(regval, LPC54_LCD_TIMH);
/* Initialize vertical timing */
putreg32(0, LPC54_LCD_TIMV);
regval = ((CONFIG_LPC54_LCD_VHEIGHT - 1) << LCD_TIMV_LPP_SHIFT |
(CONFIG_LPC54_LCD_VPULSE - 1) << LCD_TIMV_VSW_SHIFT |
(CONFIG_LPC54_LCD_VFRONTPORCH) << LCD_TIMV_VFP_SHIFT |
(CONFIG_LPC54_LCD_VBACKPORCH) << LCD_TIMV_VBP_SHIFT);
putreg32(regval, LPC54_LCD_TIMV);
/* Get the pixel clock divider */
#ifdef CONFIG_LPC54_LCD_USE_CLKIN
pcd = ((uint32_t)CONFIG_LPC54_LCD_CLKIN_FREQUENCY /
(uint32_t)LPC54_LCD_PIXEL_CLOCK) + 1;
#else
pcd = ((uint32_t)BOARD_MAIN_CLK / (uint32_t)LPC54_LCD_PIXEL_CLOCK);
#endif
/* Check the range of pcd */
bcd = 0;
#ifndef CONFIG_LPC54_LCD_TFTPANEL
DEBUGASSERT(pcd >= 2);
#else
if (pcd <= 1)
{
/* Just bypass the LCD divider */
pcd = 0;
bcd = LCD_POL_BCD;
}
else
#endif
{
/* The register value is PCD - 2 */
pcd -= 2;
}
/* Initialize clock and signal polarity.
*
* REVISIT: These need to be configurable.
*/
regval = getreg32(LPC54_LCD_POL);
/* LCDFP pin is active LOW and inactive HIGH */
regval |= LCD_POL_IVS;
/* LCDLP pin is active LOW and inactive HIGH */
regval |= LCD_POL_IHS;
/* Data is driven out into the LCD on the falling edge */
regval &= ~LCD_POL_IPC;
/* Set number of clocks per line */
regval &= ~LCD_POL_CPL_MASK;
#if defined(CONFIG_LPC54_LCD_TFTPANEL)
/* TFT panel */
regval |= LCD_POL_CPL(CONFIG_LPC54_LCD_HWIDTH - 1);
#else
/* STN panel */
#if defined(CONFIG_LPC54_LCD_BPP8)
/* 8-bit monochrome STN panel */
regval |= LCD_POL_CPL((CONFIG_LPC54_LCD_HWIDTH / 8) - 1);
#elif defined(CONFIG_LPC54_LCD_BPP4)
/* 4-bit monochrome STN panel */
regval |= LCD_POL_CPL((CONFIG_LPC54_LCD_HWIDTH / 4) - 1);
#else
/* Color STN panel. */
regval |= LCD_POL_CPL(((CONFIG_LPC54_LCD_HWIDTH * 3) / 8) - 1);
#endif
#endif /* CONFIG_LPC54_LCD_TFTPANEL */
/* Set pixel clock divisor (or bypass) */
regval &= ~(LCD_POL_PCDLO_MASK | LCD_POL_PCDHI_MASK | LCD_POL_BCD);
regval |= LCD_POL_PCDLO(pcd) & LCD_POL_PCDLO_MASK;
regval |= LCD_POL_PCDHI(pcd >> 5) & LCD_POL_PCDHI_MASK;
regval |= bcd;
/* LCD_ENAB_M is active high */
regval &= ~LCD_POL_IOE;
putreg32(regval, LPC54_LCD_POL);
/* Frame base address doubleword aligned */
putreg32(CONFIG_LPC54_LCD_VRAMBASE & ~7, LPC54_LCD_UPBASE);
putreg32(CONFIG_LPC54_LCD_VRAMBASE & ~7, LPC54_LCD_LPBASE);
/* Clear the display */
lpc54_lcdclear(CONFIG_LPC54_LCD_BACKCOLOR);
#ifdef CONFIG_LPC54_LCD_BACKLIGHT
/* Turn on the back light */
lpc54_backlight(true);
#endif
putreg32(0, LPC54_LCD_INTMSK);
lcdinfo("Enabling the display\n");
for (i = LPC54_LCD_PWREN_DELAY; i; i--)
{
}
/* Enable LCD */
regval = getreg32(LPC54_LCD_CTRL);
regval |= LCD_CTRL_LCDEN;
putreg32(regval, LPC54_LCD_CTRL);
/* Enable LCD power */
for (i = LPC54_LCD_PWREN_DELAY; i; i--)
{
}
regval = getreg32(LPC54_LCD_CTRL);
regval |= LCD_CTRL_LCDPWR;
putreg32(regval, LPC54_LCD_CTRL);
return OK;
}
/****************************************************************************
* Name: up_fbgetvplane
*
* Description:
* Return a a reference to the framebuffer object for the specified video
* plane of the specified plane. Many OSDs support multiple planes of video.
*
* Input parameters:
* display - In the case of hardware with multiple displays, this
* specifies the display. Normally this is zero.
* vplane - Identifies the plane being queried.
*
* Returned Value:
* A non-NULL pointer to the frame buffer access structure is returned on
* success; NULL is returned on any failure.
*
****************************************************************************/
FAR struct fb_vtable_s *up_fbgetvplane(int display, int vplane)
{
lcdinfo("vplane: %d\n", vplane);
if (vplane == 0)
{
return &g_fbobject;
}
else
{
return NULL;
}
}
/****************************************************************************
* Name: up_fbuninitialize
*
* Description:
* Uninitialize the framebuffer support for the specified display.
*
* Input Parameters:
* display - In the case of hardware with multiple displays, this
* specifies the display. Normally this is zero.
*
* Returned Value:
* None
*
****************************************************************************/
void up_fbuninitialize(int display)
{
uint32_t regval;
int i;
/* We assume there is only one use of the LCD and so we do not need to
* worry about mutually exclusive access to the LCD hardware.
*/
#ifdef CONFIG_LPC54_LCD_BACKLIGHT
/* Turn off the back light */
lpc54_backlight(false);
#endif
/* Disable the LCD controller */
regval = getreg32(LPC54_LCD_CTRL);
regval &= ~LCD_CTRL_LCDPWR;
putreg32(regval, LPC54_LCD_CTRL);
for (i = LPC54_LCD_PWRDIS_DELAY; i; i--)
{
}
regval &= ~LCD_CTRL_LCDEN;
putreg32(regval, LPC54_LCD_CTRL);
/* Turn off clocking to the LCD. modifyreg32() can do this atomically. */
putreg32(SYSCON_LCDCLKSEL_NONE, LPC54_SYSCON_LCDCLKSEL);
/* Disable clocking to the LCD peripheral */
lpc54_lcd_disableclk();
}
/****************************************************************************
* Name: lpc54_lcdclear
*
* Description:
* This is a non-standard LCD interface just for the LPC54xx. Clearing
* the display in the normal way by writing a sequences of runs that
* covers the entire display can be slow. Here the dispaly is cleared by
* simply setting all VRAM memory to the specified color.
*
****************************************************************************/
void lpc54_lcdclear(nxgl_mxpixel_t color)
{
int i;
#if LPC54_BPP > 16
uint32_t *dest = (uint32_t *)CONFIG_LPC54_LCD_VRAMBASE;
lcdinfo("Clearing display: color=%08x VRAM=%08x size=%d\n",
color, CONFIG_LPC54_LCD_VRAMBASE,
CONFIG_LPC54_LCD_HWIDTH * CONFIG_LPC54_LCD_VHEIGHT * sizeof(uint32_t));
#else
uint16_t *dest = (uint16_t *)CONFIG_LPC54_LCD_VRAMBASE;
lcdinfo("Clearing display: color=%08x VRAM=%08x size=%d\n",
color, CONFIG_LPC54_LCD_VRAMBASE,
CONFIG_LPC54_LCD_HWIDTH * CONFIG_LPC54_LCD_VHEIGHT * sizeof(uint16_t));
#endif
for (i = 0; i < (CONFIG_LPC54_LCD_HWIDTH * CONFIG_LPC54_LCD_VHEIGHT); i++)
{
*dest++ = color;
}
}
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