1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/arch/arm/mach-pxa/pxa2xx.c
 4 *
 5 * code specific to pxa2xx
 6 *
 7 * Copyright (C) 2008 Dmitry Baryshkov
 8 */
 9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/device.h>
13#include <linux/io.h>
14
15#include "pxa2xx-regs.h"
16#include "mfp-pxa25x.h"
17#include "generic.h"
18#include "reset.h"
19#include "smemc.h"
20#include <linux/soc/pxa/smemc.h>
21
22void pxa2xx_clear_reset_status(unsigned int mask)
23{
24	/* RESET_STATUS_* has a 1:1 mapping with RCSR */
25	RCSR = mask;
26}
27
28#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
29#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
30
31int pxa2xx_smemc_get_sdram_rows(void)
32{
33	static int sdram_rows;
34	unsigned int drac2 = 0, drac0 = 0;
35	u32 mdcnfg;
36
37	if (sdram_rows)
38		return sdram_rows;
39
40	mdcnfg = readl_relaxed(MDCNFG);
41
42	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
43		drac2 = MDCNFG_DRAC2(mdcnfg);
44
45	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
46		drac0 = MDCNFG_DRAC0(mdcnfg);
47
48	sdram_rows = 1 << (11 + max(drac0, drac2));
49	return sdram_rows;
50}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/arch/arm/mach-pxa/pxa2xx.c
 4 *
 5 * code specific to pxa2xx
 6 *
 7 * Copyright (C) 2008 Dmitry Baryshkov
 8 */
 9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/device.h>
13#include <linux/io.h>
14
15#include "pxa2xx-regs.h"
16#include "mfp-pxa25x.h"
17#include "generic.h"
18#include "reset.h"
19#include "smemc.h"
20#include <linux/soc/pxa/smemc.h>
21
22void pxa2xx_clear_reset_status(unsigned int mask)
23{
24	/* RESET_STATUS_* has a 1:1 mapping with RCSR */
25	RCSR = mask;
26}
27
28#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
29#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
30
31int pxa2xx_smemc_get_sdram_rows(void)
32{
33	static int sdram_rows;
34	unsigned int drac2 = 0, drac0 = 0;
35	u32 mdcnfg;
36
37	if (sdram_rows)
38		return sdram_rows;
39
40	mdcnfg = readl_relaxed(MDCNFG);
41
42	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
43		drac2 = MDCNFG_DRAC2(mdcnfg);
44
45	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
46		drac0 = MDCNFG_DRAC0(mdcnfg);
47
48	sdram_rows = 1 << (11 + max(drac0, drac2));
49	return sdram_rows;
50}