[U-Boot] [PATCH 09/12] VIDEO: davinci: add framebuffer to da8xx
Stefano Babic
sbabic at denx.de
Wed Oct 5 11:43:36 CEST 2011
The patch is a port of the Linux driver da8xx-fb.c used
on davinci da8xx and OMAP-L138 boards.
Last commit seen on this driver used as base
for porting is 1db41e032d563eb47deab40dc5595be306b143ba
(video: da8xx-fb: fix section mismatch warning)
Signed-off-by: Stefano Babic <sbabic at denx.de>
CC: Sandeep Paulraj <s-paulraj at ti.com>
Cc: Anatolij Gustschin <agust at denx.de>
---
arch/arm/include/asm/arch-davinci/da8xx-fb.h | 122 ++++
drivers/video/Makefile | 1 +
drivers/video/da8xx-fb.c | 846 ++++++++++++++++++++++++++
3 files changed, 969 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/include/asm/arch-davinci/da8xx-fb.h
create mode 100644 drivers/video/da8xx-fb.c
diff --git a/arch/arm/include/asm/arch-davinci/da8xx-fb.h b/arch/arm/include/asm/arch-davinci/da8xx-fb.h
new file mode 100644
index 0000000..88613a5
--- /dev/null
+++ b/arch/arm/include/asm/arch-davinci/da8xx-fb.h
@@ -0,0 +1,122 @@
+/*
+ * Header file for TI DA8XX LCD controller platform data.
+ *
+ * Copyright (C) 2008-2009 MontaVista Software Inc.
+ * Copyright (C) 2008-2009 Texas Instruments Inc
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef DA8XX_FB_H
+#define DA8XX_FB_H
+
+enum panel_type {
+ QVGA = 0
+};
+
+enum panel_shade {
+ MONOCHROME = 0,
+ COLOR_ACTIVE,
+ COLOR_PASSIVE,
+};
+
+enum raster_load_mode {
+ LOAD_DATA = 1,
+ LOAD_PALETTE,
+};
+
+struct display_panel {
+ enum panel_type panel_type; /* QVGA */
+ int max_bpp;
+ int min_bpp;
+ enum panel_shade panel_shade;
+};
+
+struct da8xx_panel {
+ const char name[25]; /* Full name <vendor>_<model> */
+ unsigned short width;
+ unsigned short height;
+ int hfp; /* Horizontal front porch */
+ int hbp; /* Horizontal back porch */
+ int hsw; /* Horizontal Sync Pulse Width */
+ int vfp; /* Vertical front porch */
+ int vbp; /* Vertical back porch */
+ int vsw; /* Vertical Sync Pulse Width */
+ unsigned int pxl_clk; /* Pixel clock */
+ unsigned char invert_pxl_clk; /* Invert Pixel clock */
+};
+
+struct da8xx_lcdc_platform_data {
+ const char manu_name[10];
+ void *controller_data;
+ const char type[25];
+ void (*panel_power_ctrl)(int);
+};
+
+struct lcd_ctrl_config {
+ const struct display_panel *p_disp_panel;
+
+ /* AC Bias Pin Frequency */
+ int ac_bias;
+
+ /* AC Bias Pin Transitions per Interrupt */
+ int ac_bias_intrpt;
+
+ /* DMA burst size */
+ int dma_burst_sz;
+
+ /* Bits per pixel */
+ int bpp;
+
+ /* FIFO DMA Request Delay */
+ int fdd;
+
+ /* TFT Alternative Signal Mapping (Only for active) */
+ unsigned char tft_alt_mode;
+
+ /* 12 Bit Per Pixel (5-6-5) Mode (Only for passive) */
+ unsigned char stn_565_mode;
+
+ /* Mono 8-bit Mode: 1=D0-D7 or 0=D0-D3 */
+ unsigned char mono_8bit_mode;
+
+ /* Invert line clock */
+ unsigned char invert_line_clock;
+
+ /* Invert frame clock */
+ unsigned char invert_frm_clock;
+
+ /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
+ unsigned char sync_edge;
+
+ /* Horizontal and Vertical Sync: Control: 0=ignore */
+ unsigned char sync_ctrl;
+
+ /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
+ unsigned char raster_order;
+};
+
+struct lcd_sync_arg {
+ int back_porch;
+ int front_porch;
+ int pulse_width;
+};
+
+#if 0
+/* ioctls */
+#define FBIOGET_CONTRAST _IOR('F', 1, int)
+#define FBIOPUT_CONTRAST _IOW('F', 2, int)
+#define FBIGET_BRIGHTNESS _IOR('F', 3, int)
+#define FBIPUT_BRIGHTNESS _IOW('F', 3, int)
+#define FBIGET_COLOR _IOR('F', 5, int)
+#define FBIPUT_COLOR _IOW('F', 6, int)
+#define FBIPUT_HSYNC _IOW('F', 9, int)
+#define FBIPUT_VSYNC _IOW('F', 10, int)
+#endif
+
+void da8xx_video_init(const struct da8xx_panel *panel, int bits_pixel);
+
+#endif /* ifndef DA8XX_FB_H */
+
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 3790f91..7aafd8c 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -33,6 +33,7 @@ COBJS-$(CONFIG_S6E63D6) += s6e63d6.o
COBJS-$(CONFIG_SED156X) += sed156x.o
COBJS-$(CONFIG_VIDEO_AMBA) += amba.o
COBJS-$(CONFIG_VIDEO_CT69000) += ct69000.o videomodes.o
+COBJS-$(CONFIG_VIDEO_DA8XX) += da8xx-fb.o videomodes.o
COBJS-$(CONFIG_VIDEO_MB862xx) += mb862xx.o videomodes.o
COBJS-$(CONFIG_VIDEO_MB86R0xGDC) += mb86r0xgdc.o videomodes.o
COBJS-$(CONFIG_VIDEO_MX3) += mx3fb.o
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
new file mode 100644
index 0000000..bca9fb5
--- /dev/null
+++ b/drivers/video/da8xx-fb.c
@@ -0,0 +1,846 @@
+/*
+ * Porting to u-boot:
+ *
+ * (C) Copyright 2011
+ * Stefano Babic, DENX Software Engineering, sbabic at denx.de.
+ *
+ * Copyright (C) 2008-2009 MontaVista Software Inc.
+ * Copyright (C) 2008-2009 Texas Instruments Inc
+ *
+ * Based on the LCD driver for TI Avalanche processors written by
+ * Ajay Singh and Shalom Hai.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option)any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <video_fb.h>
+#include <linux/list.h>
+#include <linux/fb.h>
+
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+#include "videomodes.h"
+#include <asm/arch/da8xx-fb.h>
+
+#define DRIVER_NAME "da8xx_lcdc"
+
+/* LCD Status Register */
+#define LCD_END_OF_FRAME1 (1 << 9)
+#define LCD_END_OF_FRAME0 (1 << 8)
+#define LCD_PL_LOAD_DONE (1 << 6)
+#define LCD_FIFO_UNDERFLOW (1 << 5)
+#define LCD_SYNC_LOST (1 << 2)
+
+/* LCD DMA Control Register */
+#define LCD_DMA_BURST_SIZE(x) ((x) << 4)
+#define LCD_DMA_BURST_1 0x0
+#define LCD_DMA_BURST_2 0x1
+#define LCD_DMA_BURST_4 0x2
+#define LCD_DMA_BURST_8 0x3
+#define LCD_DMA_BURST_16 0x4
+#define LCD_END_OF_FRAME_INT_ENA (1 << 2)
+#define LCD_DUAL_FRAME_BUFFER_ENABLE (1 << 0)
+
+/* LCD Control Register */
+#define LCD_CLK_DIVISOR(x) ((x) << 8)
+#define LCD_RASTER_MODE 0x01
+
+/* LCD Raster Control Register */
+#define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
+#define PALETTE_AND_DATA 0x00
+#define PALETTE_ONLY 0x01
+#define DATA_ONLY 0x02
+
+#define LCD_MONO_8BIT_MODE (1 << 9)
+#define LCD_RASTER_ORDER (1 << 8)
+#define LCD_TFT_MODE (1 << 7)
+#define LCD_UNDERFLOW_INT_ENA (1 << 6)
+#define LCD_PL_ENABLE (1 << 4)
+#define LCD_MONOCHROME_MODE (1 << 1)
+#define LCD_RASTER_ENABLE (1 << 0)
+#define LCD_TFT_ALT_ENABLE (1 << 23)
+#define LCD_STN_565_ENABLE (1 << 24)
+
+/* LCD Raster Timing 2 Register */
+#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
+#define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
+#define LCD_SYNC_CTRL (1 << 25)
+#define LCD_SYNC_EDGE (1 << 24)
+#define LCD_INVERT_PIXEL_CLOCK (1 << 22)
+#define LCD_INVERT_LINE_CLOCK (1 << 21)
+#define LCD_INVERT_FRAME_CLOCK (1 << 20)
+
+/* LCD Block */
+struct da8xx_lcd_regs {
+ u32 revid;
+ u32 ctrl;
+ u32 stat;
+ u32 lidd_ctrl;
+ u32 lidd_cs0_conf;
+ u32 lidd_cs0_addr;
+ u32 lidd_cs0_data;
+ u32 lidd_cs1_conf;
+ u32 lidd_cs1_addr;
+ u32 lidd_cs1_data;
+ u32 raster_ctrl;
+ u32 raster_timing_0;
+ u32 raster_timing_1;
+ u32 raster_timing_2;
+ u32 raster_subpanel;
+ u32 reserved;
+ u32 dma_ctrl;
+ u32 dma_frm_buf_base_addr_0;
+ u32 dma_frm_buf_ceiling_addr_0;
+ u32 dma_frm_buf_base_addr_1;
+ u32 dma_frm_buf_ceiling_addr_1;
+};
+
+#define LCD_NUM_BUFFERS 1
+
+#define WSI_TIMEOUT 50
+#define PALETTE_SIZE 256
+#define LEFT_MARGIN 64
+#define RIGHT_MARGIN 64
+#define UPPER_MARGIN 32
+#define LOWER_MARGIN 32
+
+#define calc_fbsize() (panel.plnSizeX * panel.plnSizeY * panel.gdfBytesPP)
+#define mdelay(n) ({unsigned long msec = (n); while (msec--) udelay(1000); })
+
+static struct da8xx_lcd_regs *da8xx_fb_reg_base;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* graphics setup */
+static GraphicDevice gpanel;
+static const struct da8xx_panel *lcd_panel;
+static struct fb_info *da8xx_fb_info;
+static int bits_x_pixel;
+
+static inline unsigned int lcdc_read(u32 *addr)
+{
+ return (unsigned int)readl(addr);
+}
+
+static inline void lcdc_write(unsigned int val, u32 *addr)
+{
+ writel(val, addr);
+}
+
+struct da8xx_fb_par {
+ u32 p_palette_base;
+ unsigned char *v_palette_base;
+ dma_addr_t vram_phys;
+ unsigned long vram_size;
+ void *vram_virt;
+ unsigned int dma_start;
+ unsigned int dma_end;
+ struct clk *lcdc_clk;
+ int irq;
+ unsigned short pseudo_palette[16];
+ unsigned int palette_sz;
+ unsigned int pxl_clk;
+ int blank;
+ int vsync_flag;
+ int vsync_timeout;
+};
+
+
+/* Variable Screen Information */
+static struct fb_var_screeninfo da8xx_fb_var = {
+ .xoffset = 0,
+ .yoffset = 0,
+ .transp = {0, 0, 0},
+ .nonstd = 0,
+ .activate = 0,
+ .height = -1,
+ .width = -1,
+ .pixclock = 46666, /* 46us - AUO display */
+ .accel_flags = 0,
+ .left_margin = LEFT_MARGIN,
+ .right_margin = RIGHT_MARGIN,
+ .upper_margin = UPPER_MARGIN,
+ .lower_margin = LOWER_MARGIN,
+ .sync = 0,
+ .vmode = FB_VMODE_NONINTERLACED
+};
+
+static struct fb_fix_screeninfo da8xx_fb_fix = {
+ .id = "DA8xx FB Drv",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .type_aux = 0,
+ .visual = FB_VISUAL_PSEUDOCOLOR,
+ .xpanstep = 0,
+ .ypanstep = 1,
+ .ywrapstep = 0,
+ .accel = FB_ACCEL_NONE
+};
+
+static const struct display_panel disp_panel = {
+ QVGA,
+ 16,
+ 16,
+ COLOR_ACTIVE,
+};
+
+static const struct lcd_ctrl_config lcd_cfg = {
+ &disp_panel,
+ .ac_bias = 255,
+ .ac_bias_intrpt = 0,
+ .dma_burst_sz = 16,
+ .bpp = 16,
+ .fdd = 255,
+ .tft_alt_mode = 0,
+ .stn_565_mode = 0,
+ .mono_8bit_mode = 0,
+ .invert_line_clock = 1,
+ .invert_frm_clock = 1,
+ .sync_edge = 0,
+ .sync_ctrl = 1,
+ .raster_order = 0,
+};
+
+/* Enable the Raster Engine of the LCD Controller */
+static inline void lcd_enable_raster(void)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
+ if (!(reg & LCD_RASTER_ENABLE))
+ lcdc_write(reg | LCD_RASTER_ENABLE,
+ &da8xx_fb_reg_base->raster_ctrl);
+}
+
+/* Disable the Raster Engine of the LCD Controller */
+static inline void lcd_disable_raster(void)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
+ if (reg & LCD_RASTER_ENABLE)
+ lcdc_write(reg & ~LCD_RASTER_ENABLE,
+ &da8xx_fb_reg_base->raster_ctrl);
+}
+
+static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
+{
+ u32 start;
+ u32 end;
+ u32 reg_ras;
+ u32 reg_dma;
+
+ /* init reg to clear PLM (loading mode) fields */
+ reg_ras = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
+ reg_ras &= ~(3 << 20);
+
+ reg_dma = lcdc_read(&da8xx_fb_reg_base->dma_ctrl);
+
+ if (load_mode == LOAD_DATA) {
+ start = par->dma_start;
+ end = par->dma_end;
+
+ reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
+ reg_dma |= LCD_END_OF_FRAME_INT_ENA;
+
+#if (LCD_NUM_BUFFERS == 2)
+ reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
+ lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
+ lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
+ lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
+ lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
+#else
+ reg_dma &= ~LCD_DUAL_FRAME_BUFFER_ENABLE;
+ lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
+ lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
+ lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
+ lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
+#endif
+
+ } else if (load_mode == LOAD_PALETTE) {
+ start = par->p_palette_base;
+ end = start + par->palette_sz - 1;
+
+ reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
+ reg_ras |= LCD_PL_ENABLE;
+
+ lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
+ lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
+ }
+
+ lcdc_write(reg_dma, &da8xx_fb_reg_base->dma_ctrl);
+ lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
+
+ /*
+ * The Raster enable bit must be set after all other control fields are
+ * set.
+ */
+ lcd_enable_raster();
+}
+
+/* Configure the Burst Size of DMA */
+static int lcd_cfg_dma(int burst_size)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->dma_ctrl) & 0x00000001;
+ switch (burst_size) {
+ case 1:
+ reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
+ break;
+ case 2:
+ reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
+ break;
+ case 4:
+ reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
+ break;
+ case 8:
+ reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
+ break;
+ case 16:
+ reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
+ break;
+ default:
+ return -EINVAL;
+ }
+ lcdc_write(reg, &da8xx_fb_reg_base->dma_ctrl);
+
+ return 0;
+}
+
+static void lcd_cfg_ac_bias(int period, int transitions_per_int)
+{
+ u32 reg;
+
+ /* Set the AC Bias Period and Number of Transisitons per Interrupt */
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2) & 0xFFF00000;
+ reg |= LCD_AC_BIAS_FREQUENCY(period) |
+ LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
+}
+
+static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
+ int front_porch)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0) & 0xf;
+ reg |= ((back_porch & 0xff) << 24)
+ | ((front_porch & 0xff) << 16)
+ | ((pulse_width & 0x3f) << 10);
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
+}
+
+static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
+ int front_porch)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1) & 0x3ff;
+ reg |= ((back_porch & 0xff) << 24)
+ | ((front_porch & 0xff) << 16)
+ | ((pulse_width & 0x3f) << 10);
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
+}
+
+static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
+{
+ u32 reg;
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(LCD_TFT_MODE |
+ LCD_MONO_8BIT_MODE |
+ LCD_MONOCHROME_MODE);
+
+ switch (cfg->p_disp_panel->panel_shade) {
+ case MONOCHROME:
+ reg |= LCD_MONOCHROME_MODE;
+ if (cfg->mono_8bit_mode)
+ reg |= LCD_MONO_8BIT_MODE;
+ break;
+ case COLOR_ACTIVE:
+ reg |= LCD_TFT_MODE;
+ if (cfg->tft_alt_mode)
+ reg |= LCD_TFT_ALT_ENABLE;
+ break;
+
+ case COLOR_PASSIVE:
+ if (cfg->stn_565_mode)
+ reg |= LCD_STN_565_ENABLE;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ /* enable additional interrupts here */
+ reg |= LCD_UNDERFLOW_INT_ENA;
+
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
+
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2);
+
+ if (cfg->sync_ctrl)
+ reg |= LCD_SYNC_CTRL;
+ else
+ reg &= ~LCD_SYNC_CTRL;
+
+ if (cfg->sync_edge)
+ reg |= LCD_SYNC_EDGE;
+ else
+ reg &= ~LCD_SYNC_EDGE;
+
+ if (cfg->invert_line_clock)
+ reg |= LCD_INVERT_LINE_CLOCK;
+ else
+ reg &= ~LCD_INVERT_LINE_CLOCK;
+
+ if (cfg->invert_frm_clock)
+ reg |= LCD_INVERT_FRAME_CLOCK;
+ else
+ reg &= ~LCD_INVERT_FRAME_CLOCK;
+
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
+
+ return 0;
+}
+
+static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
+ u32 bpp, u32 raster_order)
+{
+ u32 reg;
+
+ /* Set the Panel Width */
+ /* Pixels per line = (PPL + 1)*16 */
+ /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
+ width &= 0x3f0;
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0);
+ reg &= 0xfffffc00;
+ reg |= ((width >> 4) - 1) << 4;
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
+
+ /* Set the Panel Height */
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1);
+ reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
+
+ /* Set the Raster Order of the Frame Buffer */
+ reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(1 << 8);
+ if (raster_order)
+ reg |= LCD_RASTER_ORDER;
+ lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
+
+ switch (bpp) {
+ case 1:
+ case 2:
+ case 4:
+ case 16:
+ par->palette_sz = 16 * 2;
+ break;
+
+ case 8:
+ par->palette_sz = 256 * 2;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ struct da8xx_fb_par *par = info->par;
+ unsigned short *palette = (unsigned short *) par->v_palette_base;
+ u_short pal;
+ int update_hw = 0;
+
+ if (regno > 255)
+ return 1;
+
+ if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
+ return 1;
+
+ if (info->var.bits_per_pixel == 8) {
+ red >>= 4;
+ green >>= 8;
+ blue >>= 12;
+
+ pal = (red & 0x0f00);
+ pal |= (green & 0x00f0);
+ pal |= (blue & 0x000f);
+
+ if (palette[regno] != pal) {
+ update_hw = 1;
+ palette[regno] = pal;
+ }
+ } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
+ red >>= (16 - info->var.red.length);
+ red <<= info->var.red.offset;
+
+ green >>= (16 - info->var.green.length);
+ green <<= info->var.green.offset;
+
+ blue >>= (16 - info->var.blue.length);
+ blue <<= info->var.blue.offset;
+
+ par->pseudo_palette[regno] = red | green | blue;
+
+ if (palette[0] != 0x4000) {
+ update_hw = 1;
+ palette[0] = 0x4000;
+ }
+ }
+
+ /* Update the palette in the h/w as needed. */
+ if (update_hw)
+ lcd_blit(LOAD_PALETTE, par);
+
+ return 0;
+}
+
+static void lcd_reset(struct da8xx_fb_par *par)
+{
+ /* Disable the Raster if previously Enabled */
+ lcd_disable_raster();
+
+ /* DMA has to be disabled */
+ lcdc_write(0, &da8xx_fb_reg_base->dma_ctrl);
+ lcdc_write(0, &da8xx_fb_reg_base->raster_ctrl);
+}
+
+static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
+{
+ unsigned int lcd_clk, div;
+
+ /* Get clock from sysclk2 */
+ lcd_clk = clk_get(2);
+
+ div = lcd_clk / par->pxl_clk;
+ debug("LCD Clock: 0x%x Divider: 0x%x PixClk: 0x%x\n",
+ lcd_clk, div, par->pxl_clk);
+
+ /* Configure the LCD clock divisor. */
+ lcdc_write(LCD_CLK_DIVISOR(div) |
+ (LCD_RASTER_MODE & 0x1), &da8xx_fb_reg_base->ctrl);
+}
+
+static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
+ const struct da8xx_panel *panel)
+{
+ u32 bpp;
+ int ret = 0;
+
+ lcd_reset(par);
+
+ /* Calculate the divider */
+ lcd_calc_clk_divider(par);
+
+ if (panel->invert_pxl_clk)
+ lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) |
+ LCD_INVERT_PIXEL_CLOCK),
+ &da8xx_fb_reg_base->raster_timing_2);
+ else
+ lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) &
+ ~LCD_INVERT_PIXEL_CLOCK),
+ &da8xx_fb_reg_base->raster_timing_2);
+
+ /* Configure the DMA burst size. */
+ ret = lcd_cfg_dma(cfg->dma_burst_sz);
+ if (ret < 0)
+ return ret;
+
+ /* Configure the AC bias properties. */
+ lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
+
+ /* Configure the vertical and horizontal sync properties. */
+ lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
+ lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
+
+ /* Configure for disply */
+ ret = lcd_cfg_display(cfg);
+ if (ret < 0)
+ return ret;
+
+ if (QVGA != cfg->p_disp_panel->panel_type)
+ return -EINVAL;
+
+ if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
+ cfg->bpp >= cfg->p_disp_panel->min_bpp)
+ bpp = cfg->bpp;
+ else
+ bpp = cfg->p_disp_panel->max_bpp;
+ if (bpp == 12)
+ bpp = 16;
+ ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
+ (unsigned int)panel->height, bpp,
+ cfg->raster_order);
+ if (ret < 0)
+ return ret;
+
+ /* Configure FDD */
+ lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & 0xfff00fff) |
+ (cfg->fdd << 12), &da8xx_fb_reg_base->raster_ctrl);
+
+ return 0;
+}
+
+static void lcdc_dma_start(void)
+{
+ struct da8xx_fb_par *par = da8xx_fb_info->par;
+ lcdc_write(par->dma_start,
+ &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
+ lcdc_write(par->dma_end,
+ &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
+ lcdc_write(0,
+ &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
+ lcdc_write(0,
+ &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
+}
+
+static u32 lcdc_irq_handler(void)
+{
+ struct da8xx_fb_par *par = da8xx_fb_info->par;
+ u32 stat = lcdc_read(&da8xx_fb_reg_base->stat);
+ u32 reg_ras;
+
+ if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
+ debug("LCD_SYNC_LOST\n");
+ lcd_disable_raster();
+ lcdc_write(stat, &da8xx_fb_reg_base->stat);
+ lcd_enable_raster();
+ return LCD_SYNC_LOST;
+ } else if (stat & LCD_PL_LOAD_DONE) {
+ debug("LCD_PL_LOAD_DONE\n");
+ /*
+ * Must disable raster before changing state of any control bit.
+ * And also must be disabled before clearing the PL loading
+ * interrupt via the following write to the status register. If
+ * this is done after then one gets multiple PL done interrupts.
+ */
+ lcd_disable_raster();
+
+ lcdc_write(stat, &da8xx_fb_reg_base->stat);
+
+ /* Disable PL completion inerrupt */
+ reg_ras = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
+ reg_ras &= ~LCD_PL_ENABLE;
+ lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
+
+ /* Setup and start data loading mode */
+ lcd_blit(LOAD_DATA, par);
+ return LCD_PL_LOAD_DONE;
+ } else {
+ lcdc_write(stat, &da8xx_fb_reg_base->stat);
+
+ if (stat & LCD_END_OF_FRAME0)
+ debug("LCD_END_OF_FRAME0\n");
+
+ lcdc_write(par->dma_start,
+ &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
+ lcdc_write(par->dma_end,
+ &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
+ par->vsync_flag = 1;
+ return LCD_END_OF_FRAME0;
+ }
+ return stat;
+}
+
+static u32 wait_for_event(u32 event)
+{
+ u32 timeout = 50000;
+ u32 ret;
+
+ do {
+ ret = lcdc_irq_handler();
+ udelay(1000);
+ } while (!(ret & event));
+
+ if (timeout <= 0) {
+ printf("%s: event %d not hit\n", __func__, event);
+ return -1;
+ }
+
+ return 0;
+
+}
+
+void *video_hw_init(void)
+{
+ struct da8xx_fb_par *par;
+ int ret;
+ u32 size;
+ char *p;
+
+ if (!lcd_panel) {
+ printf("Display not initialized\n");
+ return NULL;
+ }
+ gpanel.winSizeX = lcd_panel->width;
+ gpanel.winSizeY = lcd_panel->height;
+ gpanel.plnSizeX = lcd_panel->width;
+ gpanel.plnSizeY = lcd_panel->height;
+
+ switch (bits_x_pixel) {
+ case 24:
+ gpanel.gdfBytesPP = 4;
+ gpanel.gdfIndex = GDF_32BIT_X888RGB;
+ break;
+ case 16:
+ gpanel.gdfBytesPP = 2;
+ gpanel.gdfIndex = GDF_16BIT_565RGB;
+ break;
+ default:
+ gpanel.gdfBytesPP = 1;
+ gpanel.gdfIndex = GDF__8BIT_INDEX;
+ break;
+ }
+
+ da8xx_fb_reg_base = (struct da8xx_lcd_regs *)DAVINCI_LCD_CNTL_BASE;
+
+ debug("Resolution: %dx%d %x\n",
+ gpanel.winSizeX,
+ gpanel.winSizeY,
+ lcd_cfg.bpp);
+
+ size = sizeof(struct fb_info) + sizeof(struct da8xx_fb_par);
+ da8xx_fb_info = malloc(size);
+ debug("da8xx_fb_info at %x\n", (unsigned int)da8xx_fb_info);
+
+ if (!da8xx_fb_info) {
+ printf("Memory allocation failed for fb_info\n");
+ return NULL;
+ }
+ memset(da8xx_fb_info, 0, size);
+ p = (char *)da8xx_fb_info;
+ da8xx_fb_info->par = p + sizeof(struct fb_info);
+ debug("da8xx_par at %x\n", (unsigned int)da8xx_fb_info->par);
+
+ par = da8xx_fb_info->par;
+ par->pxl_clk = lcd_panel->pxl_clk;
+
+ if (lcd_init(par, &lcd_cfg, lcd_panel) < 0) {
+ printf("lcd_init failed\n");
+ ret = -EFAULT;
+ goto err_release_fb;
+ }
+
+ /* allocate frame buffer */
+ par->vram_size = lcd_panel->width * lcd_panel->height * lcd_cfg.bpp;
+ par->vram_size = par->vram_size * LCD_NUM_BUFFERS / 8;
+
+ par->vram_virt = malloc(par->vram_size);
+
+ par->vram_phys = (dma_addr_t) par->vram_virt;
+ debug("Requesting 0x%x bytes for framebuffer at 0x%x\n",
+ (unsigned int)par->vram_size,
+ (unsigned int)par->vram_virt);
+ if (!par->vram_virt) {
+ printf("GLCD: malloc for frame buffer failed\n");
+ ret = -EINVAL;
+ goto err_release_fb;
+ }
+
+ gpanel.frameAdrs = (unsigned int)par->vram_virt;
+ da8xx_fb_info->screen_base = (char *) par->vram_virt;
+ da8xx_fb_fix.smem_start = gpanel.frameAdrs;
+ da8xx_fb_fix.smem_len = par->vram_size;
+ da8xx_fb_fix.line_length = (lcd_panel->width * lcd_cfg.bpp) / 8;
+
+ par->dma_start = par->vram_phys;
+ par->dma_end = par->dma_start + lcd_panel->height *
+ da8xx_fb_fix.line_length - 1;
+
+ /* allocate palette buffer */
+ par->v_palette_base = malloc(PALETTE_SIZE);
+ if (!par->v_palette_base) {
+ printf("GLCD: malloc for palette buffer failed\n");
+ goto err_release_fb_mem;
+ }
+ memset(par->v_palette_base, 0, PALETTE_SIZE);
+ par->p_palette_base = (unsigned int)par->v_palette_base;
+
+ /* Initialize par */
+ da8xx_fb_info->var.bits_per_pixel = lcd_cfg.bpp;
+
+ da8xx_fb_var.xres = lcd_panel->width;
+ da8xx_fb_var.xres_virtual = lcd_panel->width;
+
+ da8xx_fb_var.yres = lcd_panel->height;
+ da8xx_fb_var.yres_virtual = lcd_panel->height * LCD_NUM_BUFFERS;
+
+ da8xx_fb_var.grayscale =
+ lcd_cfg.p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
+ da8xx_fb_var.bits_per_pixel = lcd_cfg.bpp;
+
+ da8xx_fb_var.hsync_len = lcd_panel->hsw;
+ da8xx_fb_var.vsync_len = lcd_panel->vsw;
+
+ /* Initialize fbinfo */
+ da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
+ da8xx_fb_info->fix = da8xx_fb_fix;
+ da8xx_fb_info->var = da8xx_fb_var;
+ da8xx_fb_info->pseudo_palette = par->pseudo_palette;
+ da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+
+ /* Clear interrupt */
+ memset((void *)par->vram_virt, 0, par->vram_size);
+ lcd_disable_raster();
+ lcdc_write(0xFFFF, &da8xx_fb_reg_base->stat);
+ debug("Palette at 0x%x size %d\n", par->p_palette_base,
+ par->palette_sz);
+ lcdc_dma_start();
+
+ /* Load a default palette */
+ fb_setcolreg(0, 0, 0, 0, 0xffff, da8xx_fb_info);
+
+ /* Check that the palette is loaded */
+ wait_for_event(LCD_PL_LOAD_DONE);
+
+ /* Wait until DMA is working */
+ wait_for_event(LCD_END_OF_FRAME0);
+
+ return (void *)&gpanel;
+
+err_release_fb_mem:
+ free(par->vram_virt);
+
+err_release_fb:
+ free(da8xx_fb_info);
+
+ return NULL;
+}
+
+void video_set_lut(unsigned int index, /* color number */
+ unsigned char r, /* red */
+ unsigned char g, /* green */
+ unsigned char b /* blue */
+ )
+{
+
+ return;
+}
+
+void da8xx_video_init(const struct da8xx_panel *panel, int bits_pixel)
+{
+ lcd_panel = panel;
+ bits_x_pixel = bits_pixel;
+}
--
1.7.1
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