u-boot/board/zipitz2/zipitz2.c

/*
 * Copyright (C) 2009
 * Marek Vasut <marek.vasut@gmail.com>
 *
 * Heavily based on pxa255_idp platform
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <command.h>
#include <serial.h>
#include <asm/arch/hardware.h>
#include <asm/arch/pxa.h>
#include <asm/arch/regs-mmc.h>
#include <spi.h>
#include <asm/io.h>

DECLARE_GLOBAL_DATA_PTR;

#ifdef	CONFIG_CMD_SPI
void lcd_start(void);
#else
inline void lcd_start(void) {};
#endif

/*
 * Miscelaneous platform dependent initialisations
 */

int board_init (void)
{
	/* We have RAM, disable cache */
	dcache_disable();
	icache_disable();

	/* arch number of Z2 */
	gd->bd->bi_arch_number = MACH_TYPE_ZIPIT2;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0xa0000100;

	/* Enable LCD */
	lcd_start();

	return 0;
}

int dram_init(void)
{
	pxa2xx_dram_init();
	gd->ram_size = PHYS_SDRAM_1_SIZE;
	return 0;
}

void dram_init_banksize(void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
}

#ifdef	CONFIG_CMD_MMC
int board_mmc_init(bd_t *bis)
{
	pxa_mmc_register(0);
	return 0;
}
#endif

#ifdef	CONFIG_CMD_SPI

struct {
	unsigned char	reg;
	unsigned short	data;
	unsigned char	mdelay;
} lcd_data[] = {
	{ 0x07,	0x0000,	0 },
	{ 0x13,	0x0000,	10 },
	{ 0x11,	0x3004,	0 },
	{ 0x14,	0x200F,	0 },
	{ 0x10,	0x1a20,	0 },
	{ 0x13,	0x0040,	50 },
	{ 0x13,	0x0060,	0 },
	{ 0x13,	0x0070,	200 },
	{ 0x01,	0x0127,	0 },
	{ 0x02,	0x0700,	0 },
	{ 0x03,	0x1030,	0 },
	{ 0x08,	0x0208,	0 },
	{ 0x0B,	0x0620,	0 },
	{ 0x0C,	0x0110,	0 },
	{ 0x30,	0x0120,	0 },
	{ 0x31,	0x0127,	0 },
	{ 0x32,	0x0000,	0 },
	{ 0x33,	0x0503,	0 },
	{ 0x34,	0x0727,	0 },
	{ 0x35,	0x0124,	0 },
	{ 0x36,	0x0706,	0 },
	{ 0x37,	0x0701,	0 },
	{ 0x38,	0x0F00,	0 },
	{ 0x39,	0x0F00,	0 },
	{ 0x40,	0x0000,	0 },
	{ 0x41,	0x0000,	0 },
	{ 0x42,	0x013f,	0 },
	{ 0x43,	0x0000,	0 },
	{ 0x44,	0x013f,	0 },
	{ 0x45,	0x0000,	0 },
	{ 0x46,	0xef00,	0 },
	{ 0x47,	0x013f,	0 },
	{ 0x48,	0x0000,	0 },
	{ 0x07,	0x0015,	30 },
	{ 0x07,	0x0017,	0 },
	{ 0x20,	0x0000,	0 },
	{ 0x21,	0x0000,	0 },
	{ 0x22,	0x0000,	0 },
};

void zipitz2_spi_sda(int set)
{
	/* GPIO 13 */
	if (set)
		writel((1 << 13), GPSR0);
	else
		writel((1 << 13), GPCR0);
}

void zipitz2_spi_scl(int set)
{
	/* GPIO 22 */
	if (set)
		writel((1 << 22), GPCR0);
	else
		writel((1 << 22), GPSR0);
}

unsigned char zipitz2_spi_read(void)
{
	/* GPIO 40 */
	return !!(readl(GPLR1) & (1 << 8));
}

int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
	/* Always valid */
	return 1;
}

void spi_cs_activate(struct spi_slave *slave)
{
	/* GPIO 88 low */
	writel((1 << 24), GPCR2);
}

void spi_cs_deactivate(struct spi_slave *slave)
{
	/* GPIO 88 high */
	writel((1 << 24), GPSR2);

}

void lcd_start(void)
{
	int i;
	unsigned char reg[3] = { 0x74, 0x00, 0 };
	unsigned char data[3] = { 0x76, 0, 0 };
	unsigned char dummy[3] = { 0, 0, 0 };

	/* PWM2 AF */
	writel(readl(GAFR0_L) | 0x00800000, GAFR0_L);
	/* Enable clock to all PWM */
	writel(readl(CKEN) | 0x3, CKEN);
	/* Configure PWM2 */
	writel(0x4f, PWM_CTRL2);
	writel(0x2ff, PWM_PWDUTY2);
	writel(792, PWM_PERVAL2);

	/* Toggle the reset pin to reset the LCD */
	writel((1 << 19), GPSR0);
	udelay(100000);
	writel((1 << 19), GPCR0);
	udelay(20000);
	writel((1 << 19), GPSR0);
	udelay(20000);

	/* Program the LCD init sequence */
	for (i = 0; i < sizeof(lcd_data) / sizeof(lcd_data[0]); i++) {
		reg[0] = 0x74;
		reg[1] = 0x0;
		reg[2] = lcd_data[i].reg;
		spi_xfer(NULL, 24, reg, dummy, SPI_XFER_BEGIN | SPI_XFER_END);

		data[0] = 0x76;
		data[1] = lcd_data[i].data >> 8;
		data[2] = lcd_data[i].data & 0xff;
		spi_xfer(NULL, 24, data, dummy, SPI_XFER_BEGIN | SPI_XFER_END);

		if (lcd_data[i].mdelay)
			udelay(lcd_data[i].mdelay * 1000);
	}

	writel((1 << 11), GPSR0);
}
#endif