summaryrefslogtreecommitdiffstats
path: root/arch/arm/cpu/arm926ejs/pantheon/dram.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/cpu/arm926ejs/pantheon/dram.c')
-rw-r--r--arch/arm/cpu/arm926ejs/pantheon/dram.c117
1 files changed, 0 insertions, 117 deletions
diff --git a/arch/arm/cpu/arm926ejs/pantheon/dram.c b/arch/arm/cpu/arm926ejs/pantheon/dram.c
deleted file mode 100644
index f77e3d0ab5..0000000000
--- a/arch/arm/cpu/arm926ejs/pantheon/dram.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * (C) Copyright 2011
- * Marvell Semiconductor <www.marvell.com>
- * Written-by: Lei Wen <leiwen@marvell.com>,
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/arch/pantheon.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/*
- * Pantheon DRAM controller supports upto 8 banks
- * for chip select 0 and 1
- */
-
-/*
- * DDR Memory Control Registers
- * Refer Datasheet 4.4
- */
-struct panthddr_map_registers {
- u32 cs; /* Memory Address Map Register -CS */
- u32 pad[3];
-};
-
-struct panthddr_registers {
- u8 pad[0x100 - 0x000];
- struct panthddr_map_registers mmap[2];
-};
-
-/*
- * panth_sdram_base - reads SDRAM Base Address Register
- */
-u32 panth_sdram_base(int chip_sel)
-{
- struct panthddr_registers *ddr_regs =
- (struct panthddr_registers *)PANTHEON_DRAM_BASE;
- u32 result = 0;
- u32 CS_valid = 0x01 & readl(&ddr_regs->mmap[chip_sel].cs);
-
- if (!CS_valid)
- return 0;
-
- result = readl(&ddr_regs->mmap[chip_sel].cs) & 0xFF800000;
- return result;
-}
-
-/*
- * panth_sdram_size - reads SDRAM size
- */
-u32 panth_sdram_size(int chip_sel)
-{
- struct panthddr_registers *ddr_regs =
- (struct panthddr_registers *)PANTHEON_DRAM_BASE;
- u32 result = 0;
- u32 CS_valid = 0x01 & readl(&ddr_regs->mmap[chip_sel].cs);
-
- if (!CS_valid)
- return 0;
-
- result = readl(&ddr_regs->mmap[chip_sel].cs);
- result = (result >> 16) & 0xF;
- if (result < 0x7) {
- printf("Unknown DRAM Size\n");
- return -1;
- } else {
- return ((0x8 << (result - 0x7)) * 1024 * 1024);
- }
-}
-
-#ifndef CONFIG_SYS_BOARD_DRAM_INIT
-int dram_init(void)
-{
- int i;
-
- gd->ram_size = 0;
- for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
- gd->bd->bi_dram[i].start = panth_sdram_base(i);
- gd->bd->bi_dram[i].size = panth_sdram_size(i);
- /*
- * It is assumed that all memory banks are consecutive
- * and without gaps.
- * If the gap is found, ram_size will be reported for
- * consecutive memory only
- */
- if (gd->bd->bi_dram[i].start != gd->ram_size)
- break;
-
- gd->ram_size += gd->bd->bi_dram[i].size;
-
- }
-
- for (; i < CONFIG_NR_DRAM_BANKS; i++) {
- /*
- * If above loop terminated prematurely, we need to set
- * remaining banks' start address & size as 0. Otherwise other
- * u-boot functions and Linux kernel gets wrong values which
- * could result in crash
- */
- gd->bd->bi_dram[i].start = 0;
- gd->bd->bi_dram[i].size = 0;
- }
- return 0;
-}
-
-/*
- * If this function is not defined here,
- * board.c alters dram bank zero configuration defined above.
- */
-void dram_init_banksize(void)
-{
- dram_init();
-}
-#endif /* CONFIG_SYS_BOARD_DRAM_INIT */
OpenPOWER on IntegriCloud