/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2008 by Rob Purchase * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "config.h" #include "hwcompat.h" #include "kernel.h" #include "lcd.h" #include "system.h" #include "cpu.h" /* GPIO A pins for LCD panel SDI interface */ #define LTV250QV_CS (1<<24) #define LTV250QV_SCL (1<<25) #define LTV250QV_SDI (1<<26) /* LCD Controller registers */ #define LCDC_CTRL (*(volatile unsigned long *)0xF0000000) #define LCDC_CLKDIV (*(volatile unsigned long *)0xF0000008) #define LCDC_HTIME1 (*(volatile unsigned long *)0xF000000C) #define LCDC_HTIME2 (*(volatile unsigned long *)0xF0000010) #define LCDC_VTIME1 (*(volatile unsigned long *)0xF0000014) #define LCDC_VTIME2 (*(volatile unsigned long *)0xF0000018) #define LCDC_VTIME3 (*(volatile unsigned long *)0xF000001C) #define LCDC_VTIME4 (*(volatile unsigned long *)0xF0000020) #define LCDC_DS (*(volatile unsigned long *)0xF000005C) #define LCDC_I1CTRL (*(volatile unsigned long *)0xF000008C) #define LCDC_I1POS (*(volatile unsigned long *)0xF0000090) #define LCDC_I1SIZE (*(volatile unsigned long *)0xF0000094) #define LCDC_I1BASE (*(volatile unsigned long *)0xF0000098) #define LCDC_I1OFF (*(volatile unsigned long *)0xF00000A8) #define LCDC_I1SCALE (*(volatile unsigned long *)0xF00000AC) /* Power and display status */ static bool display_on = false; /* Is the display turned on? */ static unsigned lcd_yuv_options = 0; /* Framebuffer copy as seen by the hardware */ fb_data lcd_driver_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]; int lcd_default_contrast(void) { return 0x1f; } void lcd_set_contrast(int val) { /* TODO: This won't be implemented until the S6F2002 controller is better understood (nb: registers 16-23 control gamma). */ (void)val; } /* LTV250QV panel functions */ /* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */ static void delay_loop(void) { unsigned long x; for (x = (unsigned)(FREQ>>23); x; x--); } #define DELAY delay_loop() static void ltv250qv_write(unsigned int command) { int i; GPIOA_CLEAR = LTV250QV_CS; DELAY; for (i = 23; i >= 0; i--) { GPIOA_CLEAR = LTV250QV_SCL; DELAY; if ((command>>i) & 1) GPIOA_SET = LTV250QV_SDI; else GPIOA_CLEAR = LTV250QV_SDI; DELAY; GPIOA_SET = LTV250QV_SCL; } DELAY; GPIOA_SET = LTV250QV_CS; } static void lcd_write_reg(unsigned char reg, unsigned short val) { ltv250qv_write(0x740000 | reg); ltv250qv_write(0x760000 | val); } /* TEMP: Rough millisecond delay routine used by the LCD panel init sequence. PCK_TCT must first have been initialised to 2Mhz by calling clock_init(). */ static void sleep_ms(unsigned int ms) { /* disable timer */ TCFG1 = 0; /* set Timer1 reference value based on 125kHz tick */ TREF1 = ms * 125; /* single count, zero the counter, divider = 16 [2^(3+1)], enable */ TCFG1 = (1<<9) | (1<<8) | (3<<4) | 1; /* wait until Timer1 ref reached */ while (!(TIREQ & TF1)) {}; } static void lcd_display_on(void) { /* power on sequence as per the D2 firmware */ GPIOA_SET = (1<<16); sleep_ms(10); lcd_write_reg(1, 0x1D); lcd_write_reg(2, 0x0); lcd_write_reg(3, 0x0); lcd_write_reg(4, 0x0); lcd_write_reg(5, 0x40A3); lcd_write_reg(6, 0x0); lcd_write_reg(7, 0x0); lcd_write_reg(8, 0x0); lcd_write_reg(9, 0x0); lcd_write_reg(10, 0x0); lcd_write_reg(16, 0x0); lcd_write_reg(17, 0x0); lcd_write_reg(18, 0x0); lcd_write_reg(19, 0x0); lcd_write_reg(20, 0x0); lcd_write_reg(21, 0x0); lcd_write_reg(22, 0x0); lcd_write_reg(23, 0x0); lcd_write_reg(24, 0x0); lcd_write_reg(25, 0x0); sleep_ms(10); lcd_write_reg(9, 0x4055); lcd_write_reg(10, 0x0); sleep_ms(40); lcd_write_reg(10, 0x2000); sleep_ms(40); lcd_write_reg(1, 0xC01D); lcd_write_reg(2, 0x204); lcd_write_reg(3, 0xE100); lcd_write_reg(4, 0x1000); lcd_write_reg(5, 0x5033); lcd_write_reg(6, 0x2); /* vertical back porch adjusted from 0x4 in OF */ lcd_write_reg(7, 0x30); lcd_write_reg(8, 0x41C); lcd_write_reg(16, 0x207); lcd_write_reg(17, 0x702); lcd_write_reg(18, 0xB05); lcd_write_reg(19, 0xB05); lcd_write_reg(20, 0x707); lcd_write_reg(21, 0x507); lcd_write_reg(22, 0x103); lcd_write_reg(23, 0x406); lcd_write_reg(24, 0x2); lcd_write_reg(25, 0x0); sleep_ms(60); lcd_write_reg(9, 0xA55); lcd_write_reg(10, 0x111F); sleep_ms(10); /* tell that we're on now */ display_on = true; } static void lcd_display_off(void) { /* block drawing operations and changing of first */ display_on = false; /* LQV shutdown sequence */ lcd_write_reg(9, 0x55); lcd_write_reg(10, 0x1417); lcd_write_reg(5, 0x4003); sleep_ms(10); lcd_write_reg(9, 0x0); sleep_ms(10); /* kill power to LCD panel (unconfirmed) */ GPIOA_CLEAR = (1<<16); } void lcd_enable(bool on) { if (on == display_on) return; if (on) { lcd_display_on(); LCDC_CTRL |= 1; /* controller enable */ lcd_update(); /* Resync display */ lcd_call_enable_hook(); } else { LCDC_CTRL &= ~1; /* controller disable */ lcd_display_off(); } } bool lcd_enabled(void) { return display_on; } /* TODO: implement lcd_sleep() and separate out the power on/off functions */ void lcd_init_device(void) { BCLKCTR |= 4; /* enable LCD bus clock */ /* set PCK_LCD to 108Mhz */ PCLK_LCD &= ~PCK_EN; PCLK_LCD = PCK_EN | (CKSEL_PLL1<<24) | 1; /* source = PLL1, divided by 2 */ /* reset the LCD controller */ SWRESET |= 4; SWRESET &= ~4; /* set port configuration */ PORTCFG1 &= ~0xC0000000; PORTCFG1 &= ~0x3FC0; PORTCFG2 &= ~0x100; /* set physical display size */ LCDC_DS = (LCD_HEIGHT<<16) | LCD_WIDTH; LCDC_HTIME1 = (0x2d<<16) | 0x3bf; LCDC_HTIME2 = (1<<16) | 1; LCDC_VTIME1 = LCDC_VTIME3 = (0<<16) | 239; LCDC_VTIME2 = LCDC_VTIME4 = (1<<16) | 3; LCDC_I1BASE = (unsigned int)lcd_driver_framebuffer; LCDC_I1SIZE = (LCD_HEIGHT<<16) | LCD_WIDTH; /* image 1 size */ LCDC_I1POS = (0<<16) | 0; /* position */ LCDC_I1OFF = 0; /* address offset */ LCDC_I1SCALE = 0; /* scaling */ LCDC_I1CTRL = 5; /* 565bpp (7 = 888bpp) */ LCDC_CTRL &= ~(1<<28); LCDC_CLKDIV = (LCDC_CLKDIV &~ 0xFF00FF) | (1<<16) | 2; /* and this means? */ /* set and clear various flags - not investigated yet */ LCDC_CTRL &~ 0x090006AA; /* clear bits 1,3,5,7,9,10,24,27 */ LCDC_CTRL |= 0x02800144; /* set bits 2,6,8,25,23 */ LCDC_CTRL = (LCDC_CTRL &~ 0xF0000) | 0x20000; LCDC_CTRL = (LCDC_CTRL &~ 0x700000) | 0x700000; /* enable LCD controller */ LCDC_CTRL |= 1; /* enable LTV250QV panel */ lcd_display_on(); } /*** Update functions ***/ /* Copies a rectangle from one framebuffer to another. Can be used in single transfer mode with width = num pixels, and height = 1 which allows a full-width rectangle to be copied more efficiently. */ extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src, int width, int height); /* Update the display. This must be called after all other LCD functions that change the display. */ void lcd_update(void) ICODE_ATTR; void lcd_update(void) { if (!display_on) return; lcd_copy_buffer_rect(&lcd_driver_framebuffer[0][0], &lcd_framebuffer[0][0], LCD_WIDTH*LCD_HEIGHT, 1); } /* Update a fraction of the display. */ void lcd_update_rect(int, int, int, int) ICODE_ATTR; void lcd_update_rect(int x, int y, int width, int height) { fb_data *dst, *src; if (!display_on) return; if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; /* Clip right */ if (x < 0) width += x, x = 0; /* Clip left */ if (width <= 0) return; /* nothing left to do */ if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; /* Clip bottom */ if (y < 0) height += y, y = 0; /* Clip top */ if (height <= 0) return; /* nothing left to do */ /* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer * and lcd_framebuffer */ dst = &lcd_driver_framebuffer[y][x]; src = &lcd_framebuffer[y][x]; /* Copy part of the Rockbox framebuffer to the second framebuffer */ if (width < LCD_WIDTH) { /* Not full width - do line-by-line */ lcd_copy_buffer_rect(dst, src, width, height); } else { /* Full width - copy as one line */ lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1); } } void lcd_set_flip(bool yesno) { // TODO (void)yesno; } void lcd_set_invert_display(bool yesno) { // TODO (void)yesno; } void lcd_yuv_set_options(unsigned options) { lcd_yuv_options = options; } /* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */ extern void lcd_write_yuv420_lines(fb_data *dst, unsigned char const * const src[3], int width, int stride); extern void lcd_write_yuv420_lines_odither(fb_data *dst, unsigned char const * const src[3], int width, int stride, int x_screen, /* To align dither pattern */ int y_screen); /* Performance function to blit a YUV bitmap directly to the LCD */ void lcd_blit_yuv(unsigned char * const src[3], int src_x, int src_y, int stride, int x, int y, int width, int height) { unsigned char const * yuv_src[3]; off_t z; if (!display_on) return; /* Sorry, but width and height must be >= 2 or else */ width &= ~1; height >>= 1; fb_data *dst = &lcd_driver_framebuffer[y][x]; z = stride*src_y; yuv_src[0] = src[0] + z + src_x; yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1); yuv_src[2] = src[2] + (yuv_src[1] - src[1]); if (lcd_yuv_options & LCD_YUV_DITHER) { do { lcd_write_yuv420_lines_odither(dst, yuv_src, width, stride, y, x); yuv_src[0] += stride << 1; /* Skip down two luma lines */ yuv_src[1] += stride >> 1; /* Skip down one chroma line */ yuv_src[2] += stride >> 1; dst += 2*LCD_FBWIDTH; y -= 2; } while (--height > 0); } else { do { lcd_write_yuv420_lines(dst, yuv_src, width, stride); yuv_src[0] += stride << 1; /* Skip down two luma lines */ yuv_src[1] += stride >> 1; /* Skip down one chroma line */ yuv_src[2] += stride >> 1; dst += 2*LCD_FBWIDTH; } while (--height > 0); } }