/* * video.c - run splash screen on lcd * * Copyright (c) 2007-2008 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #include <stdarg.h> #include <common.h> #include <config.h> #include <malloc.h> #include <asm/blackfin.h> #include <asm/gpio.h> #include <asm/portmux.h> #include <asm/mach-common/bits/dma.h> #include <i2c.h> #include <linux/types.h> #include <stdio_dev.h> #define DMA_SIZE16 2 #include <asm/mach-common/bits/eppi.h> #include <asm/bfin_logo_230x230.h> #define LCD_X_RES 480 /*Horizontal Resolution */ #define LCD_Y_RES 272 /* Vertical Resolution */ #define LCD_BPP 24 /* Bit Per Pixel */ #define LCD_PIXEL_SIZE (LCD_BPP / 8) #define DMA_BUS_SIZE 32 #define ACTIVE_VIDEO_MEM_OFFSET 0 /* -- Horizontal synchronizing -- * * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet * (LCY-W-06602A Page 9 of 22) * * Clock Frequency 1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz * * Period TH - 525 - Clock * Pulse width THp - 41 - Clock * Horizontal period THd - 480 - Clock * Back porch THb - 2 - Clock * Front porch THf - 2 - Clock * * -- Vertical synchronizing -- * Period TV - 286 - Line * Pulse width TVp - 10 - Line * Vertical period TVd - 272 - Line * Back porch TVb - 2 - Line * Front porch TVf - 2 - Line */ #define LCD_CLK (8*1000*1000) /* 8MHz */ /* # active data to transfer after Horizontal Delay clock */ #define EPPI_HCOUNT LCD_X_RES /* # active lines to transfer after Vertical Delay clock */ #define EPPI_VCOUNT LCD_Y_RES /* Samples per Line = 480 (active data) + 45 (padding) */ #define EPPI_LINE 525 /* Lines per Frame = 272 (active data) + 14 (padding) */ #define EPPI_FRAME 286 /* FS1 (Hsync) Width (Typical)*/ #define EPPI_FS1W_HBL 41 /* FS1 (Hsync) Period (Typical) */ #define EPPI_FS1P_AVPL EPPI_LINE /* Horizontal Delay clock after assertion of Hsync (Typical) */ #define EPPI_HDELAY 43 /* FS2 (Vsync) Width = FS1 (Hsync) Period * 10 */ #define EPPI_FS2W_LVB (EPPI_LINE * 10) /* FS2 (Vsync) Period = FS1 (Hsync) Period * Lines per Frame */ #define EPPI_FS2P_LAVF (EPPI_LINE * EPPI_FRAME) /* Vertical Delay after assertion of Vsync (2 Lines) */ #define EPPI_VDELAY 12 #define EPPI_CLIP 0xFF00FF00 /* EPPI Control register configuration value for RGB out * - EPPI as Output * GP 2 frame sync mode, * Internal Clock generation disabled, Internal FS generation enabled, * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge, * FS1 & FS2 are active high, * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out) * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled * Swapping Enabled, * One (DMA) Channel Mode, * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output * Regular watermark - when FIFO is 100% full, * Urgent watermark - when FIFO is 75% full */ #define EPPI_CONTROL (0x20136E2E) static inline u16 get_eppi_clkdiv(u32 target_ppi_clk) { u32 sclk = get_sclk(); /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */ return (((sclk / target_ppi_clk) / 2) - 1); } void Init_PPI(void) { u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK); bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL); bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL); bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB); bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF); bfin_write_EPPI0_CLIP(EPPI_CLIP); bfin_write_EPPI0_FRAME(EPPI_FRAME); bfin_write_EPPI0_LINE(EPPI_LINE); bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT); bfin_write_EPPI0_HDELAY(EPPI_HDELAY); bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT); bfin_write_EPPI0_VDELAY(EPPI_VDELAY); bfin_write_EPPI0_CLKDIV(eppi_clkdiv); /* * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out) * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output */ #if defined(CONFIG_VIDEO_RGB666) bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 | RGB_FMT_EN); #else bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) & ~RGB_FMT_EN); #endif } #define DEB2_URGENT 0x2000 /* DEB2 Urgent */ void Init_DMA(void *dst) { #if defined(CONFIG_DEB_DMA_URGENT) bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | DEB2_URGENT); #endif bfin_write_DMA12_START_ADDR(dst); /* X count */ bfin_write_DMA12_X_COUNT((LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE); bfin_write_DMA12_X_MODIFY(DMA_BUS_SIZE / 8); /* Y count */ bfin_write_DMA12_Y_COUNT(LCD_Y_RES); bfin_write_DMA12_Y_MODIFY(DMA_BUS_SIZE / 8); /* DMA Config */ bfin_write_DMA12_CONFIG( WDSIZE_32 | /* 32 bit DMA */ DMA2D | /* 2D DMA */ FLOW_AUTO /* autobuffer mode */ ); } void Init_Ports(void) { const unsigned short pins[] = { P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, #if !defined(CONFIG_VIDEO_RGB666) P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, #endif P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, 0, }; peripheral_request_list(pins, "lcd"); gpio_request(GPIO_PE3, "lcd-disp"); gpio_direction_output(GPIO_PE3, 1); } void EnableDMA(void) { bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() | DMAEN); } void DisableDMA(void) { bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() & ~DMAEN); } /* enable and disable PPI functions */ void EnablePPI(void) { bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); } void DisablePPI(void) { bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN); } int video_init(void *dst) { Init_Ports(); Init_DMA(dst); EnableDMA(); Init_PPI(); EnablePPI(); return 0; } void video_stop(void) { DisablePPI(); DisableDMA(); } static void dma_bitblit(void *dst, fastimage_t *logo, int x, int y) { if (dcache_status()) blackfin_dcache_flush_range(logo->data, logo->data + logo->size); bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); /* Setup destination start address */ bfin_write_MDMA_D0_START_ADDR(dst + ((x & -2) * LCD_PIXEL_SIZE) + (y * LCD_X_RES * LCD_PIXEL_SIZE)); /* Setup destination xcount */ bfin_write_MDMA_D0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16); /* Setup destination xmodify */ bfin_write_MDMA_D0_X_MODIFY(DMA_SIZE16); /* Setup destination ycount */ bfin_write_MDMA_D0_Y_COUNT(logo->height); /* Setup destination ymodify */ bfin_write_MDMA_D0_Y_MODIFY((LCD_X_RES - logo->width) * LCD_PIXEL_SIZE + DMA_SIZE16); /* Setup Source start address */ bfin_write_MDMA_S0_START_ADDR(logo->data); /* Setup Source xcount */ bfin_write_MDMA_S0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16); /* Setup Source xmodify */ bfin_write_MDMA_S0_X_MODIFY(DMA_SIZE16); /* Setup Source ycount */ bfin_write_MDMA_S0_Y_COUNT(logo->height); /* Setup Source ymodify */ bfin_write_MDMA_S0_Y_MODIFY(DMA_SIZE16); /* Enable source DMA */ bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16 | DMA2D); SSYNC(); bfin_write_MDMA_D0_CONFIG(WNR | DMAEN | WDSIZE_16 | DMA2D); while (bfin_read_MDMA_D0_IRQ_STATUS() & DMA_RUN); bfin_write_MDMA_S0_IRQ_STATUS(bfin_read_MDMA_S0_IRQ_STATUS() | DMA_DONE | DMA_ERR); bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() | DMA_DONE | DMA_ERR); } void video_putc(const char c) { } void video_puts(const char *s) { } int drv_video_init(void) { int error, devices = 1; struct stdio_dev videodev; u8 *dst; u32 fbmem_size = LCD_X_RES * LCD_Y_RES * LCD_PIXEL_SIZE + ACTIVE_VIDEO_MEM_OFFSET; dst = malloc(fbmem_size); if (dst == NULL) { printf("Failed to alloc FB memory\n"); return -1; } #ifdef EASYLOGO_ENABLE_GZIP unsigned char *data = EASYLOGO_DECOMP_BUFFER; unsigned long src_len = EASYLOGO_ENABLE_GZIP; if (gunzip(data, bfin_logo.size, bfin_logo.data, &src_len)) { puts("Failed to decompress logo\n"); free(dst); return -1; } bfin_logo.data = data; #endif memset(dst + ACTIVE_VIDEO_MEM_OFFSET, bfin_logo.data[0], fbmem_size - ACTIVE_VIDEO_MEM_OFFSET); dma_bitblit(dst + ACTIVE_VIDEO_MEM_OFFSET, &bfin_logo, (LCD_X_RES - bfin_logo.width) / 2, (LCD_Y_RES - bfin_logo.height) / 2); video_init(dst); /* Video initialization */ memset(&videodev, 0, sizeof(videodev)); strcpy(videodev.name, "video"); videodev.ext = DEV_EXT_VIDEO; /* Video extensions */ videodev.flags = DEV_FLAGS_SYSTEM; /* No Output */ videodev.putc = video_putc; /* 'putc' function */ videodev.puts = video_puts; /* 'puts' function */ error = stdio_register(&videodev); return (error == 0) ? devices : error; }