/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2007 by Will Robertson * * 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 #include "inttypes.h" #include "config.h" #include "system.h" #include "cpu.h" #include "spi-imx31.h" #include "mc13783.h" #include "string.h" #include "lcd.h" #include "kernel.h" #include "lcd-target.h" #include "backlight-target.h" #define MAIN_LCD_IDMAC_CHANNEL 14 #define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)]) /* 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); static bool lcd_on = true; static bool lcd_powered = true; static unsigned lcd_yuv_options = 0; #if 0 /* Initialization data from OF bootloader. Identical to Gigabeat F/X. */ static const unsigned char lcd_init_data[50] = { /* Reg Val */ 0x0f, 0x01, 0x09, 0x06, 0x16, 0xa6, 0x1e, 0x49, 0x1f, 0x26, 0x0b, 0x2f, /* Set contrast 0-63 */ 0x0c, 0x2b, 0x19, 0x5e, 0x1a, 0x15, 0x1b, 0x15, 0x1d, 0x01, 0x00, 0x03, 0x01, 0x10, 0x02, 0x0a, 0x06, 0x04, /* Set the orientation 2=upside down, 4=normal */ 0x08, 0x2e, 0x24, 0x12, 0x25, 0x3f, 0x26, 0x0b, 0x27, 0x00, 0x28, 0x00, 0x29, 0xf6, 0x2a, 0x03, 0x2b, 0x0a, 0x04, 0x01, /* Display ON */ }; #endif static const struct spi_node lcd_spi_node = { /* Original firmware settings for LCD panel commication */ CSPI3_NUM, /* CSPI module 3 */ CSPI_CONREG_CHIP_SELECT_SS1 | /* Chip select 1 */ CSPI_CONREG_DRCTL_DONT_CARE | /* Don't care about CSPI_RDY */ CSPI_CONREG_DATA_RATE_DIV_16 | /* Clock = IPG_CLK/16 = 4,125,000Hz. */ CSPI_BITCOUNT(32-1) | /* All 32 bits are to be transferred */ CSPI_CONREG_SSPOL | /* SS active high */ CSPI_CONREG_PHA | /* Phase 1 operation */ CSPI_CONREG_POL | /* Active low polarity */ CSPI_CONREG_MODE, /* Master mode */ 0, /* SPI clock - no wait states */ }; static void lcd_write_reg(unsigned reg, unsigned val) { /* packet: |00|rr|01|vv| */ uint32_t packet = ((reg & 0xff) << 16) | 0x0100 | (val & 0xff); struct spi_transfer_desc xfer; xfer.node = &lcd_spi_node; xfer.txbuf = &packet; xfer.rxbuf = NULL; xfer.count = 1; xfer.callback = NULL; xfer.next = NULL; if (spi_transfer(&xfer)) { /* Just busy wait; the interface is not used very much */ while (!spi_transfer_complete(&xfer)); } } static void lcd_enable_interface(bool enable) { if (enable) { spi_enable_module(&lcd_spi_node); } else { spi_disable_module(&lcd_spi_node); } } static void lcd_set_power(bool powered) { if (powered) { lcd_powered = false; lcd_write_reg(0x04, 0x00); lcd_enable_interface(false); bitclr32(&GPIO3_DR, (1 << 12)); mc13783_clear(MC13783_REGULATOR_MODE1, MC13783_VCAMEN); } else { mc13783_set(MC13783_REGULATOR_MODE1, MC13783_VCAMEN); bitset32(&GPIO3_DR, (1 << 12)); lcd_enable_interface(true); lcd_write_reg(0x04, 0x01); lcd_powered = true; } } /* LCD init */ void INIT_ATTR lcd_init_device(void) { /* Move the framebuffer */ #ifdef BOOTLOADER /* Only do this once to avoid flicker */ memset(FRAME, 0x00, FRAME_SIZE); #endif IPU_IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3); IPU_IPU_IMA_DATA = FRAME_PHYS_ADDR; lcd_enable_interface(true); #ifdef HAVE_LCD_CONTRAST lcd_set_contrast(DEFAULT_CONTRAST_SETTING); #endif #ifdef HAVE_LCD_INVERT lcd_set_invert_display(false); #endif #ifdef HAVE_LCD_FLIP lcd_set_flip(false); #endif } /* Update a fraction of the display. */ void lcd_update_rect(int x, int y, int width, int height) { fb_data *dst, *src; if (!lcd_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 = (fb_data *)FRAME + LCD_WIDTH*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_sleep(void) { if (!lcd_powered) return; IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL); lcd_enable(false); lcd_set_power(false); _backlight_lcd_sleep(); } void lcd_enable(bool state) { if (state == lcd_on) return; if (state) { if (!lcd_powered) lcd_set_power(true); IPU_IDMAC_CHA_EN |= 1ul << MAIN_LCD_IDMAC_CHANNEL; sleep(HZ/50); lcd_on = true; lcd_update(); send_event(LCD_EVENT_ACTIVATION, NULL); } else { lcd_on = false; } } bool lcd_active(void) { return lcd_on; } /* Update the display. This must be called after all other LCD functions that change the display. */ void lcd_update(void) { if (!lcd_on) return; lcd_copy_buffer_rect((fb_data *)FRAME, &lcd_framebuffer[0][0], LCD_WIDTH*LCD_HEIGHT, 1); } 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 */ /* For the Gigabeat - show it rotated */ /* So the LCD_WIDTH is now the height */ 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) { /* Caches for chroma data so it only need be recaculated every other line */ unsigned char const * yuv_src[3]; off_t z; if (!lcd_on) return; /* Sorry, but width and height must be >= 2 or else */ width &= ~1; height >>= 1; y = LCD_WIDTH - 1 - y; fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + y; 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; 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; } while (--height > 0); } } #ifdef HAVE_LCD_CONTRAST void lcd_set_contrast(int val) { if (!lcd_on) return; lcd_write_reg(0x0b, val); } int lcd_default_contrast(void) { return DEFAULT_CONTRAST_SETTING; } #endif /* HAVE_LCD_CONTRAST */ #ifdef HAVE_LCD_INVERT void lcd_set_invert_display(bool yesno) { if (!lcd_on) return; lcd_write_reg(0x27, yesno ? 0x10 : 00); } #endif /* HAVE_LCD_INVERT */ #ifdef HAVE_LCD_FLIP void lcd_set_flip(bool yesno) { if (!lcd_on) return; lcd_write_reg(0x06, yesno ? 0x02 : 0x04); } #endif /* HAVE_LCD_FLIP */