arch/arm/mach-pxa/pxa2xx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/arch/arm/mach-pxa/pxa2xx.c
 *
 * code specific to pxa2xx
 *
 * Copyright (C) 2008 Dmitry Baryshkov
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/io.h>

#include "pxa2xx-regs.h"
#include "mfp-pxa25x.h"
#include "generic.h"
#include "reset.h"
#include "smemc.h"
#include <linux/soc/pxa/smemc.h>
#include <linux/platform_data/irda-pxaficp.h>

void pxa2xx_clear_reset_status(unsigned int mask)
{
	/* RESET_STATUS_* has a 1:1 mapping with RCSR */
	RCSR = mask;
}

static unsigned long pxa2xx_mfp_fir[] = {
	GPIO46_FICP_RXD,
	GPIO47_FICP_TXD,
};

static unsigned long pxa2xx_mfp_sir[] = {
	GPIO46_STUART_RXD,
	GPIO47_STUART_TXD,
};

static unsigned long pxa2xx_mfp_off[] = {
	GPIO46_GPIO | MFP_LPM_DRIVE_LOW,
	GPIO47_GPIO | MFP_LPM_DRIVE_LOW,
};

void pxa2xx_transceiver_mode(struct device *dev, int mode)
{
	if (mode & IR_OFF) {
		pxa2xx_mfp_config(pxa2xx_mfp_off, ARRAY_SIZE(pxa2xx_mfp_off));
	} else if (mode & IR_SIRMODE) {
		pxa2xx_mfp_config(pxa2xx_mfp_sir, ARRAY_SIZE(pxa2xx_mfp_sir));
	} else if (mode & IR_FIRMODE) {
		pxa2xx_mfp_config(pxa2xx_mfp_fir, ARRAY_SIZE(pxa2xx_mfp_fir));
	} else
		BUG();
}
EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode);

#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)

int pxa2xx_smemc_get_sdram_rows(void)
{
	static int sdram_rows;
	unsigned int drac2 = 0, drac0 = 0;
	u32 mdcnfg;

	if (sdram_rows)
		return sdram_rows;

	mdcnfg = readl_relaxed(MDCNFG);

	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
		drac2 = MDCNFG_DRAC2(mdcnfg);

	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
		drac0 = MDCNFG_DRAC0(mdcnfg);

	sdram_rows = 1 << (11 + max(drac0, drac2));
	return sdram_rows;
}