4e8320d2ec
Might as well rename spi_enable_module to spi_enable_node for consistency as well so long as I'm being picky. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31442 a1c6a512-1295-4272-9138-f99709370657
244 lines
5.8 KiB
C
244 lines
5.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Will Robertson
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifdef BOOTLOADER
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#include <string.h> /* memset */
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#endif
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#include "config.h"
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#include "system.h"
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#include "lcd.h"
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#include "lcd-target.h"
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#include "backlight-target.h"
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#include "spi-imx31.h"
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#include "mc13783.h"
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#define MAIN_LCD_IDMAC_CHANNEL 14
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extern bool lcd_on; /* lcd-memframe.c */
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static bool lcd_powered = true;
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/* Settings shadow regs */
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#ifdef HAVE_LCD_CONTRAST
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static uint8_t reg0x0b = 0x2f;
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#endif
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#ifdef HAVE_LCD_INVERT
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static uint8_t reg0x27 = 0x00;
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#endif
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#ifdef HAVE_LCD_FLIP
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static uint8_t reg0x06 = 0x04;
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#endif
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#if 0
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/* Initialization data from OF bootloader. Identical to Gigabeat F/X. */
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static const unsigned char lcd_init_data[50] =
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{
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/* Reg Val */
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0x0f, 0x01,
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0x09, 0x06,
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0x16, 0xa6,
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0x1e, 0x49,
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0x1f, 0x26,
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0x0b, 0x2f, /* Set contrast 0-63 */
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0x0c, 0x2b,
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0x19, 0x5e,
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0x1a, 0x15,
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0x1b, 0x15,
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0x1d, 0x01,
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0x00, 0x03,
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0x01, 0x10,
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0x02, 0x0a,
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0x06, 0x04, /* Set the orientation 0x02=upside down, 0x04=normal */
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0x08, 0x2e,
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0x24, 0x12,
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0x25, 0x3f,
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0x26, 0x0b,
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0x27, 0x00, /* Invert display 0x00=normal, 0x10=inverted */
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0x28, 0x00,
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0x29, 0xf6,
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0x2a, 0x03,
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0x2b, 0x0a,
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0x04, 0x01, /* Display ON */
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};
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#endif
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static const struct spi_node lcd_spi_node =
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{
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/* Original firmware settings for LCD panel communication */
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CSPI3_NUM, /* CSPI module 3 */
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CSPI_CONREG_CHIP_SELECT_SS1 | /* Chip select 1 */
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CSPI_CONREG_DRCTL_DONT_CARE | /* Don't care about CSPI_RDY */
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CSPI_CONREG_DATA_RATE_DIV_16 | /* Clock = IPG_CLK/16 = 4,125,000Hz. */
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CSPI_BITCOUNT(32-1) | /* All 32 bits are to be transferred */
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CSPI_CONREG_SSPOL | /* SS active high */
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CSPI_CONREG_PHA | /* Phase 1 operation */
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CSPI_CONREG_POL | /* Active low polarity */
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CSPI_CONREG_MODE, /* Master mode */
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0, /* SPI clock - no wait states */
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};
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static void lcd_write_reg(unsigned reg, unsigned val)
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{
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/* packet: |00|rr|01|vv| */
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uint32_t packet = ((reg & 0xff) << 16) | 0x0100 | (val & 0xff);
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struct spi_transfer_desc xfer;
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xfer.node = &lcd_spi_node;
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xfer.txbuf = &packet;
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xfer.rxbuf = NULL;
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xfer.count = 1;
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xfer.callback = NULL;
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xfer.next = NULL;
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if (spi_transfer(&xfer))
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{
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/* Just busy wait; the interface is not used very much */
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while (!spi_transfer_complete(&xfer));
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}
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}
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static void lcd_enable_interface(bool enable)
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{
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spi_enable_node(&lcd_spi_node, enable);
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}
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static void lcd_set_power(bool powered)
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{
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if (powered)
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{
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lcd_powered = false;
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lcd_write_reg(0x04, 0x00);
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lcd_enable_interface(false);
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bitclr32(&GPIO3_DR, (1 << 12));
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mc13783_clear(MC13783_REGULATOR_MODE1, MC13783_VCAMEN);
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}
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else
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{
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mc13783_set(MC13783_REGULATOR_MODE1, MC13783_VCAMEN);
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bitset32(&GPIO3_DR, (1 << 12));
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lcd_enable_interface(true);
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lcd_write_reg(0x04, 0x01);
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lcd_powered = true;
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}
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}
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static void lcd_sync_settings(void)
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{
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#ifdef HAVE_LCD_CONTRAST
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lcd_write_reg(0x0b, reg0x0b);
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#endif
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#ifdef HAVE_LCD_INVERT
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lcd_write_reg(0x27, reg0x27);
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#endif
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#ifdef HAVE_LCD_FLIP
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lcd_write_reg(0x06, reg0x06);
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#endif
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}
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/* LCD init */
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void INIT_ATTR lcd_init_device(void)
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{
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/* Move the framebuffer */
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#ifdef BOOTLOADER
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/* Only do this once to avoid flicker */
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memset(FRAME, 0x00, FRAME_SIZE);
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#endif
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IPU_IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3);
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IPU_IPU_IMA_DATA = FRAME_PHYS_ADDR;
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lcd_on = true;
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lcd_enable_interface(true);
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lcd_sync_settings();
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}
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void lcd_sleep(void)
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{
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if (!lcd_powered)
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return;
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IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
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lcd_enable(false);
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lcd_set_power(false);
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_backlight_lcd_sleep();
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}
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void lcd_enable(bool state)
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{
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if (state == lcd_on)
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return;
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if (state)
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{
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if (!lcd_powered)
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lcd_set_power(true);
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IPU_IDMAC_CHA_EN |= 1ul << MAIN_LCD_IDMAC_CHANNEL;
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lcd_sync_settings();
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sleep(HZ/50);
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lcd_on = true;
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lcd_update();
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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else
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{
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lcd_on = false;
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}
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}
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#ifdef HAVE_LCD_CONTRAST
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void lcd_set_contrast(int val)
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{
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reg0x0b = val & 0x3f;
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if (!lcd_on)
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return;
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lcd_write_reg(0x0b, reg0x0b);
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}
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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#endif /* HAVE_LCD_CONTRAST */
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#ifdef HAVE_LCD_INVERT
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void lcd_set_invert_display(bool yesno)
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{
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reg0x27 = yesno ? 0x10 : 0x00;
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if (!lcd_on)
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return;
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lcd_write_reg(0x27, reg0x27);
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}
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#endif /* HAVE_LCD_INVERT */
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#ifdef HAVE_LCD_FLIP
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void lcd_set_flip(bool yesno)
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{
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reg0x06 = yesno ? 0x02 : 0x04;
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if (!lcd_on)
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return;
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lcd_write_reg(0x06, reg0x06);
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}
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#endif /* HAVE_LCD_FLIP */
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