xref: /openbmc/u-boot/arch/arm/mach-aspeed/ast2400/board_common.c (revision 43e9f5a67df026ac596a04e3326e66898d8fbee5)

// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <dm.h>
#include <ram.h>
#include <timer.h>
#include <asm/io.h>
#include <asm/arch/platform.h>
#include <asm/arch/scu_ast2400.h>
#include <asm/arch/timer.h>
#include <linux/err.h>
#include <dm/uclass.h>

DECLARE_GLOBAL_DATA_PTR;

#define AST_LPC_HICR5 0x080
# define LPC_HICR5_ENFWH BIT(10)
#define AST_LPC_HICRB 0x100
# define LPC_HICRB_SIO_ILPC2AHB_DIS BIT(6)

#define AST_SDMC_PROTECT 0x00
# define SDRAM_UNLOCK_KEY 0xfc600309
#define AST_SDMC_GFX_PROT 0x08
# define SDMC_GFX_PROT_VGA_CURSOR BIT(0)
# define SDMC_GFX_PROT_VGA_CG_READ BIT(1)
# define SDMC_GFX_PROT_VGA_ASCII_READ BIT(2)
# define SDMC_GFX_PROT_VGA_CRT BIT(3)
# define SDMC_GFX_PROT_PCIE BIT(16)
# define SDMC_GFX_PROT_XDMA BIT(17)

static void isolate_bmc(void)
{
	bool sdmc_unlocked;
	u32 val;

	/* iLPC2AHB */
#if !defined(CONFIG_ASPEED_ENABLE_SUPERIO)
	val = readl(ASPEED_HW_STRAP1);
	val |= SCU_HWSTRAP_LPC_SIO_DEC_DIS;
	writel(val, ASPEED_HW_STRAP1);
#endif

	val = readl(ASPEED_LPC_CTRL + AST_LPC_HICRB);
	val |= LPC_HICRB_SIO_ILPC2AHB_DIS;
	writel(val, ASPEED_LPC_CTRL + AST_LPC_HICRB);

	/* P2A, PCIe BMC */
	val = readl(ASPEED_PCIE_CONFIG_SET);
	val &= ~(SCU_PCIE_CONFIG_SET_BMC_DMA
	         | SCU_PCIE_CONFIG_SET_BMC_MMIO
	         | SCU_PCIE_CONFIG_SET_BMC_EN
	         | SCU_PCIE_CONFIG_SET_VGA_MMIO);
	writel(val, ASPEED_PCIE_CONFIG_SET);

	/* X-DMA */
	sdmc_unlocked = readl(ASPEED_SDRAM_CTRL + AST_SDMC_PROTECT);
	if (!sdmc_unlocked)
		writel(SDRAM_UNLOCK_KEY, ASPEED_SDRAM_CTRL + AST_SDMC_PROTECT);

	val = readl(ASPEED_SDRAM_CTRL + AST_SDMC_GFX_PROT);
	val |= (SDMC_GFX_PROT_VGA_CURSOR
	        | SDMC_GFX_PROT_VGA_CG_READ
	        | SDMC_GFX_PROT_VGA_ASCII_READ
	        | SDMC_GFX_PROT_VGA_CRT
	        | SDMC_GFX_PROT_PCIE
	        | SDMC_GFX_PROT_XDMA);
	writel(val, ASPEED_SDRAM_CTRL + AST_SDMC_GFX_PROT);

	if (!sdmc_unlocked)
		writel(~SDRAM_UNLOCK_KEY, ASPEED_SDRAM_CTRL + AST_SDMC_PROTECT);

	/* LPC2AHB */
	val = readl(ASPEED_LPC_CTRL + AST_LPC_HICR5);
	val &= ~LPC_HICR5_ENFWH;
	writel(val, ASPEED_LPC_CTRL + AST_LPC_HICR5);
}

__weak int board_init(void)
{
	isolate_bmc();

	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;

	return 0;
}

#define SDMC_CONFIG_VRAM_GET(x)         ((x >> 2) & 0x3)
#define SDMC_CONFIG_MEM_GET(x)          (x & 0x3)

static const u32 ast2400_dram_table[] = {
	0x04000000,     //64MB
	0x08000000,     //128MB
	0x10000000, 	//256MB
	0x20000000,     //512MB
};

u32
ast_sdmc_get_mem_size(void)
{
	u32 size = 0;
	u32 size_conf = SDMC_CONFIG_MEM_GET(readl(0x1e6e0004));

	size = ast2400_dram_table[size_conf];

	return size;
}


static const u32 aspeed_vram_table[] = {
	0x00800000,     //8MB
	0x01000000,     //16MB
	0x02000000,     //32MB
	0x04000000,     //64MB
};

u32
ast_sdmc_get_vram_size(void)
{
	u32 size_conf = SDMC_CONFIG_VRAM_GET(readl(0x1e6e0004));
	return aspeed_vram_table[size_conf];
}

__weak int dram_init(void)
{
#if 0
	struct udevice *dev;
	struct ram_info ram;
	int ret;

	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
	if (ret) {
		debug("DRAM FAIL1\r\n");
		return ret;
	}

	ret = ram_get_info(dev, &ram);
	if (ret) {
		debug("DRAM FAIL2\r\n");
		return ret;
	}

	gd->ram_size = ram.size;
#else
	u32 vga = ast_sdmc_get_vram_size();
	u32 dram = ast_sdmc_get_mem_size();
	gd->ram_size = (dram - vga);
#endif
	return 0;
}