mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-24 12:03:39 +00:00
361 lines
9.7 KiB
C
361 lines
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Freescale i.MX28 RAM init
|
|
*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
* on behalf of DENX Software Engineering GmbH
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <init.h>
|
|
#include <log.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <linux/compiler.h>
|
|
|
|
#include "mxs_init.h"
|
|
|
|
__weak uint32_t mxs_dram_vals[] = {
|
|
/*
|
|
* i.MX28 DDR2 at 200MHz
|
|
*/
|
|
#if defined(CONFIG_MX28)
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000100, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00010101, 0x01010101,
|
|
0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101,
|
|
0x00000100, 0x00000100, 0x00000000, 0x00000002,
|
|
0x01010000, 0x07080403, 0x06005003, 0x0a0000c8,
|
|
0x02009c40, 0x0002030c, 0x0036a609, 0x031a0612,
|
|
0x02030202, 0x00c8001c, 0x00000000, 0x00000000,
|
|
0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
|
|
0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
|
|
0x00000003, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000612, 0x01000F02,
|
|
0x06120612, 0x00000200, 0x00020007, 0xf4004a27,
|
|
0xf4004a27, 0xf4004a27, 0xf4004a27, 0x07000300,
|
|
0x07000300, 0x07400300, 0x07400300, 0x00000005,
|
|
0x00000000, 0x00000000, 0x01000000, 0x01020408,
|
|
0x08040201, 0x000f1133, 0x00000000, 0x00001f04,
|
|
0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
|
|
0x00001f04, 0x00001f04, 0x00001f04, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00010000, 0x00030404,
|
|
0x00000003, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0x00000000, 0x00000000, 0x01010000,
|
|
0x01000000, 0x03030000, 0x00010303, 0x01020202,
|
|
0x00000000, 0x02040303, 0x21002103, 0x00061200,
|
|
0x06120612, 0x04420442, 0x04420442, 0x00040004,
|
|
0x00040004, 0x00000000, 0x00000000, 0x00000000,
|
|
0x00000000, 0xffffffff
|
|
|
|
/*
|
|
* i.MX23 DDR at 133MHz
|
|
*/
|
|
#elif defined(CONFIG_MX23)
|
|
0x01010001, 0x00010100, 0x01000101, 0x00000001,
|
|
0x00000101, 0x00000000, 0x00010000, 0x01000001,
|
|
0x00000000, 0x00000001, 0x07000200, 0x00070202,
|
|
0x02020000, 0x04040a01, 0x00000201, 0x02040000,
|
|
0x02000000, 0x19000f08, 0x0d0d0000, 0x02021313,
|
|
0x02061521, 0x0000000a, 0x00080008, 0x00200020,
|
|
0x00200020, 0x00200020, 0x000003f7, 0x00000000,
|
|
0x00000000, 0x00000020, 0x00000020, 0x00c80000,
|
|
0x000a23cd, 0x000000c8, 0x00006665, 0x00000000,
|
|
0x00000101, 0x00040001, 0x00000000, 0x00000000,
|
|
0x00010000
|
|
#else
|
|
#error Unsupported memory initialization
|
|
#endif
|
|
};
|
|
|
|
__weak void mxs_adjust_memory_params(uint32_t *dram_vals)
|
|
{
|
|
debug("SPL: Using default SDRAM parameters\n");
|
|
}
|
|
|
|
#ifdef CONFIG_MX28
|
|
static void initialize_dram_values(void)
|
|
{
|
|
int i;
|
|
|
|
debug("SPL: Setting mx28 board specific SDRAM parameters\n");
|
|
mxs_adjust_memory_params(mxs_dram_vals);
|
|
|
|
debug("SPL: Applying SDRAM parameters\n");
|
|
for (i = 0; i < ARRAY_SIZE(mxs_dram_vals); i++)
|
|
writel(mxs_dram_vals[i], MXS_DRAM_BASE + (4 * i));
|
|
}
|
|
#else
|
|
static void initialize_dram_values(void)
|
|
{
|
|
int i;
|
|
|
|
debug("SPL: Setting mx23 board specific SDRAM parameters\n");
|
|
mxs_adjust_memory_params(mxs_dram_vals);
|
|
|
|
/*
|
|
* HW_DRAM_CTL27, HW_DRAM_CTL28 and HW_DRAM_CTL35 are not initialized as
|
|
* per FSL bootlets code.
|
|
*
|
|
* mx23 Reference Manual marks HW_DRAM_CTL27 and HW_DRAM_CTL28 as
|
|
* "reserved".
|
|
* HW_DRAM_CTL8 is setup as the last element.
|
|
* So skip the initialization of these HW_DRAM_CTL registers.
|
|
*/
|
|
debug("SPL: Applying SDRAM parameters\n");
|
|
for (i = 0; i < ARRAY_SIZE(mxs_dram_vals); i++) {
|
|
if (i == 8 || i == 27 || i == 28 || i == 35)
|
|
continue;
|
|
writel(mxs_dram_vals[i], MXS_DRAM_BASE + (4 * i));
|
|
}
|
|
|
|
/*
|
|
* Enable tRAS lockout in HW_DRAM_CTL08 ; it must be the last
|
|
* element to be set
|
|
*/
|
|
writel((1 << 24), MXS_DRAM_BASE + (4 * 8));
|
|
}
|
|
#endif
|
|
|
|
static void mxs_mem_init_clock(void)
|
|
{
|
|
struct mxs_clkctrl_regs *clkctrl_regs =
|
|
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
|
|
#if defined(CONFIG_MX23)
|
|
/* Fractional divider for ref_emi is 33 ; 480 * 18 / 33 = 266MHz */
|
|
const unsigned char divider = 33;
|
|
#elif defined(CONFIG_MX28)
|
|
/* Fractional divider for ref_emi is 21 ; 480 * 18 / 21 = 411MHz */
|
|
const unsigned char divider = 21;
|
|
#endif
|
|
|
|
debug("SPL: Initialising FRAC0\n");
|
|
|
|
/* Gate EMI clock */
|
|
writeb(CLKCTRL_FRAC_CLKGATE,
|
|
&clkctrl_regs->hw_clkctrl_frac0_set[CLKCTRL_FRAC0_EMI]);
|
|
|
|
/* Set fractional divider for ref_emi */
|
|
writeb(CLKCTRL_FRAC_CLKGATE | (divider & CLKCTRL_FRAC_FRAC_MASK),
|
|
&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_EMI]);
|
|
|
|
/* Ungate EMI clock */
|
|
writeb(CLKCTRL_FRAC_CLKGATE,
|
|
&clkctrl_regs->hw_clkctrl_frac0_clr[CLKCTRL_FRAC0_EMI]);
|
|
|
|
early_delay(11000);
|
|
|
|
/* Set EMI clock divider for EMI clock to 411 / 2 = 205MHz */
|
|
writel((2 << CLKCTRL_EMI_DIV_EMI_OFFSET) |
|
|
(1 << CLKCTRL_EMI_DIV_XTAL_OFFSET),
|
|
&clkctrl_regs->hw_clkctrl_emi);
|
|
|
|
/* Unbypass EMI */
|
|
writel(CLKCTRL_CLKSEQ_BYPASS_EMI,
|
|
&clkctrl_regs->hw_clkctrl_clkseq_clr);
|
|
|
|
early_delay(10000);
|
|
debug("SPL: FRAC0 Initialised\n");
|
|
}
|
|
|
|
static void mxs_mem_setup_cpu_and_hbus(void)
|
|
{
|
|
struct mxs_clkctrl_regs *clkctrl_regs =
|
|
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
|
|
|
|
debug("SPL: Setting CPU and HBUS clock frequencies\n");
|
|
|
|
/* Set fractional divider for ref_cpu to 480 * 18 / 19 = 454MHz
|
|
* and ungate CPU clock */
|
|
writeb(19 & CLKCTRL_FRAC_FRAC_MASK,
|
|
(uint8_t *)&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_CPU]);
|
|
|
|
/* Set CPU bypass */
|
|
writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
|
|
&clkctrl_regs->hw_clkctrl_clkseq_set);
|
|
|
|
/* HBUS = 151MHz */
|
|
writel(CLKCTRL_HBUS_DIV_MASK, &clkctrl_regs->hw_clkctrl_hbus_set);
|
|
writel(((~3) << CLKCTRL_HBUS_DIV_OFFSET) & CLKCTRL_HBUS_DIV_MASK,
|
|
&clkctrl_regs->hw_clkctrl_hbus_clr);
|
|
|
|
early_delay(10000);
|
|
|
|
/* CPU clock divider = 1 */
|
|
clrsetbits_le32(&clkctrl_regs->hw_clkctrl_cpu,
|
|
CLKCTRL_CPU_DIV_CPU_MASK, 1);
|
|
|
|
/* Disable CPU bypass */
|
|
writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
|
|
&clkctrl_regs->hw_clkctrl_clkseq_clr);
|
|
|
|
early_delay(15000);
|
|
}
|
|
|
|
static void mxs_mem_setup_vdda(void)
|
|
{
|
|
struct mxs_power_regs *power_regs =
|
|
(struct mxs_power_regs *)MXS_POWER_BASE;
|
|
|
|
debug("SPL: Configuring VDDA\n");
|
|
|
|
writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
|
|
(0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
|
|
POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
|
|
&power_regs->hw_power_vddactrl);
|
|
}
|
|
|
|
uint32_t mxs_mem_get_size(void)
|
|
{
|
|
uint32_t sz, da;
|
|
uint32_t *vt = (uint32_t *)0x20;
|
|
/* The following is "subs pc, r14, #4", used as return from DABT. */
|
|
const uint32_t data_abort_memdetect_handler = 0xe25ef004;
|
|
|
|
/* Replace the DABT handler. */
|
|
da = vt[4];
|
|
vt[4] = data_abort_memdetect_handler;
|
|
|
|
sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
|
|
|
|
/* Restore the old DABT handler. */
|
|
vt[4] = da;
|
|
|
|
return sz;
|
|
}
|
|
|
|
#ifdef CONFIG_MX23
|
|
static void mx23_mem_setup_vddmem(void)
|
|
{
|
|
struct mxs_power_regs *power_regs =
|
|
(struct mxs_power_regs *)MXS_POWER_BASE;
|
|
|
|
debug("SPL: Setting mx23 VDDMEM\n");
|
|
|
|
/* We must wait before and after disabling the current limiter! */
|
|
early_delay(10000);
|
|
|
|
clrbits_le32(&power_regs->hw_power_vddmemctrl,
|
|
POWER_VDDMEMCTRL_ENABLE_ILIMIT);
|
|
|
|
early_delay(10000);
|
|
|
|
}
|
|
|
|
static void mx23_mem_init(void)
|
|
{
|
|
debug("SPL: Initialising mx23 SDRAM Controller\n");
|
|
|
|
/*
|
|
* Reset/ungate the EMI block. This is essential, otherwise the system
|
|
* suffers from memory instability. This thing is mx23 specific and is
|
|
* no longer present on mx28.
|
|
*/
|
|
mxs_reset_block((struct mxs_register_32 *)MXS_EMI_BASE);
|
|
|
|
mx23_mem_setup_vddmem();
|
|
|
|
/*
|
|
* Configure the DRAM registers
|
|
*/
|
|
|
|
/* Clear START and SREFRESH bit from DRAM_CTL8 */
|
|
clrbits_le32(MXS_DRAM_BASE + 0x20, (1 << 16) | (1 << 8));
|
|
|
|
initialize_dram_values();
|
|
|
|
/* Set START bit in DRAM_CTL8 */
|
|
setbits_le32(MXS_DRAM_BASE + 0x20, 1 << 16);
|
|
|
|
clrbits_le32(MXS_DRAM_BASE + 0x40, 1 << 17);
|
|
|
|
/* Wait for EMI_STAT bit DRAM_HALTED */
|
|
for (;;) {
|
|
if (!(readl(MXS_EMI_BASE + 0x10) & (1 << 1)))
|
|
break;
|
|
early_delay(1000);
|
|
}
|
|
|
|
/* Adjust EMI port priority. */
|
|
clrsetbits_le32(0x80020000, 0x1f << 16, 0x2);
|
|
early_delay(20000);
|
|
|
|
setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 19);
|
|
setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 11);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_MX28
|
|
static void mx28_mem_init(void)
|
|
{
|
|
struct mxs_pinctrl_regs *pinctrl_regs =
|
|
(struct mxs_pinctrl_regs *)MXS_PINCTRL_BASE;
|
|
|
|
debug("SPL: Initialising mx28 SDRAM Controller\n");
|
|
|
|
/* Set DDR2 mode */
|
|
writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
|
|
&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
|
|
|
|
/*
|
|
* Configure the DRAM registers
|
|
*/
|
|
|
|
/* Clear START bit from DRAM_CTL16 */
|
|
clrbits_le32(MXS_DRAM_BASE + 0x40, 1);
|
|
|
|
initialize_dram_values();
|
|
|
|
/* Clear SREFRESH bit from DRAM_CTL17 */
|
|
clrbits_le32(MXS_DRAM_BASE + 0x44, 1);
|
|
|
|
/* Set START bit in DRAM_CTL16 */
|
|
setbits_le32(MXS_DRAM_BASE + 0x40, 1);
|
|
|
|
/* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */
|
|
while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
|
|
;
|
|
}
|
|
#endif
|
|
|
|
void mxs_mem_init(void)
|
|
{
|
|
early_delay(11000);
|
|
|
|
mxs_mem_init_clock();
|
|
|
|
mxs_mem_setup_vdda();
|
|
|
|
#if defined(CONFIG_MX23)
|
|
mx23_mem_init();
|
|
#elif defined(CONFIG_MX28)
|
|
mx28_mem_init();
|
|
#endif
|
|
|
|
early_delay(10000);
|
|
|
|
mxs_mem_setup_cpu_and_hbus();
|
|
}
|