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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __MACH_IMX28_H
#define __MACH_IMX28_H
#include <linux/bitfield.h>
#include <io.h>
#define DRAM_CTL29_CS0_EN BIT(24)
#define DRAM_CTL29_CS1_EN BIT(25)
#define DRAM_CTL29_COLUMNS_DIFF GENMASK(18, 16)
#define DRAM_CTL29_ROWS_DIFF GENMASK(10, 8)
#define DRAM_CTL31_EIGHT_BANKS BIT(16)
#define DRAM_CTL(n) (IMX_SDRAMC_BASE + 4 * (n))
static inline u32 imx28_get_memsize(void)
{
u32 ctl29 = readl(DRAM_CTL(29));
u32 ctl31 = readl(DRAM_CTL(31));
int rows, columns, banks, cs0, cs1;
columns = 12 - FIELD_GET(DRAM_CTL29_COLUMNS_DIFF, ctl29);
rows = 15 - FIELD_GET(DRAM_CTL29_ROWS_DIFF, ctl29);
banks = FIELD_GET(DRAM_CTL31_EIGHT_BANKS, ctl31) ? 8 : 4;
cs0 = FIELD_GET(DRAM_CTL29_CS0_EN, ctl29);
cs1 = FIELD_GET(DRAM_CTL29_CS1_EN, ctl29);
return (1 << columns) * (1 << rows) * banks * (cs0 + cs1);
}
#endif /* __MACH_IMX28_H */
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