162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * linux/arch/arm/mach-pxa/pxa2xx.c 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * code specific to pxa2xx 662306a36Sopenharmony_ci * 762306a36Sopenharmony_ci * Copyright (C) 2008 Dmitry Baryshkov 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#include <linux/module.h> 1162306a36Sopenharmony_ci#include <linux/kernel.h> 1262306a36Sopenharmony_ci#include <linux/device.h> 1362306a36Sopenharmony_ci#include <linux/io.h> 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci#include "pxa2xx-regs.h" 1662306a36Sopenharmony_ci#include "mfp-pxa25x.h" 1762306a36Sopenharmony_ci#include "generic.h" 1862306a36Sopenharmony_ci#include "reset.h" 1962306a36Sopenharmony_ci#include "smemc.h" 2062306a36Sopenharmony_ci#include <linux/soc/pxa/smemc.h> 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_civoid pxa2xx_clear_reset_status(unsigned int mask) 2362306a36Sopenharmony_ci{ 2462306a36Sopenharmony_ci /* RESET_STATUS_* has a 1:1 mapping with RCSR */ 2562306a36Sopenharmony_ci RCSR = mask; 2662306a36Sopenharmony_ci} 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3) 2962306a36Sopenharmony_ci#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3) 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ciint pxa2xx_smemc_get_sdram_rows(void) 3262306a36Sopenharmony_ci{ 3362306a36Sopenharmony_ci static int sdram_rows; 3462306a36Sopenharmony_ci unsigned int drac2 = 0, drac0 = 0; 3562306a36Sopenharmony_ci u32 mdcnfg; 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci if (sdram_rows) 3862306a36Sopenharmony_ci return sdram_rows; 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci mdcnfg = readl_relaxed(MDCNFG); 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3)) 4362306a36Sopenharmony_ci drac2 = MDCNFG_DRAC2(mdcnfg); 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ci if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1)) 4662306a36Sopenharmony_ci drac0 = MDCNFG_DRAC0(mdcnfg); 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci sdram_rows = 1 << (11 + max(drac0, drac2)); 4962306a36Sopenharmony_ci return sdram_rows; 5062306a36Sopenharmony_ci} 51