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/*
* Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
*
* (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
*
* Copyright (C) 2011, Stefano Babic <sbabic@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/iomux-mx35.h>
#include <i2c.h>
#include <linux/types.h>
#include <asm/gpio.h>
#include <asm/arch/sys_proto.h>
#include <netdev.h>
#ifndef CONFIG_BOARD_EARLY_INIT_F
#error "CONFIG_BOARD_EARLY_INIT_F must be set for this board"
#endif
#define CCM_CCMR_CONFIG 0x003F4208
#define ESDCTL_DDR2_CONFIG 0x007FFC3F
#define ESDCTL_0x92220000 0x92220000
#define ESDCTL_0xA2220000 0xA2220000
#define ESDCTL_0xB2220000 0xB2220000
#define ESDCTL_0x82228080 0x82228080
#define ESDCTL_DDR2_EMR2 0x04000000
#define ESDCTL_DDR2_EMR3 0x06000000
#define ESDCTL_PRECHARGE 0x00000400
#define ESDCTL_DDR2_EN_DLL 0x02000400
#define ESDCTL_DDR2_RESET_DLL 0x00000333
#define ESDCTL_DDR2_MR 0x00000233
#define ESDCTL_DDR2_OCD_DEFAULT 0x02000780
#define ESDCTL_DELAY_LINE5 0x00F49F00
static inline void dram_wait(unsigned int count)
{
volatile unsigned int wait = count;
while (wait--)
;
}
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1,
PHYS_SDRAM_1_SIZE);
return 0;
}
static void board_setup_sdram_bank(u32 start_address)
{
struct esdc_regs *esdc = (struct esdc_regs *)ESDCTL_BASE_ADDR;
u32 *cfg_reg, *ctl_reg;
u32 val;
switch (start_address) {
case CSD0_BASE_ADDR:
cfg_reg = &esdc->esdcfg0;
ctl_reg = &esdc->esdctl0;
break;
case CSD1_BASE_ADDR:
cfg_reg = &esdc->esdcfg1;
ctl_reg = &esdc->esdctl1;
break;
default:
return;
}
/* Initialize MISC register for DDR2 */
val = ESDC_MISC_RST | ESDC_MISC_MDDR_EN | ESDC_MISC_MDDR_DL_RST |
ESDC_MISC_DDR_EN | ESDC_MISC_DDR2_EN;
writel(val, &esdc->esdmisc);
val &= ~(ESDC_MISC_RST | ESDC_MISC_MDDR_DL_RST);
writel(val, &esdc->esdmisc);
/*
* according to DDR2 specs, wait a while before
* the PRECHARGE_ALL command
*/
dram_wait(0x20000);
/* Load DDR2 config and timing */
writel(ESDCTL_DDR2_CONFIG, cfg_reg);
/* Precharge ALL */
writel(ESDCTL_0x92220000,
ctl_reg);
writel(0xda, start_address + ESDCTL_PRECHARGE);
/* Load mode */
writel(ESDCTL_0xB2220000,
ctl_reg);
writeb(0xda, start_address + ESDCTL_DDR2_EMR2); /* EMRS2 */
writeb(0xda, start_address + ESDCTL_DDR2_EMR3); /* EMRS3 */
writeb(0xda, start_address + ESDCTL_DDR2_EN_DLL); /* Enable DLL */
writeb(0xda, start_address + ESDCTL_DDR2_RESET_DLL); /* Reset DLL */
/* Precharge ALL */
writel(ESDCTL_0x92220000,
ctl_reg);
writel(0xda, start_address + ESDCTL_PRECHARGE);
/* Set mode auto refresh : at least two refresh are required */
writel(ESDCTL_0xA2220000,
ctl_reg);
writel(0xda, start_address);
writel(0xda, start_address);
writel(ESDCTL_0xB2220000,
ctl_reg);
writeb(0xda, start_address + ESDCTL_DDR2_MR);
writeb(0xda, start_address + ESDCTL_DDR2_OCD_DEFAULT);
/* OCD mode exit */
writeb(0xda, start_address + ESDCTL_DDR2_EN_DLL); /* Enable DLL */
/* Set normal mode */
writel(ESDCTL_0x82228080,
ctl_reg);
dram_wait(0x20000);
/* Do not set delay lines, only for MDDR */
}
static void board_setup_sdram(void)
{
struct esdc_regs *esdc = (struct esdc_regs *)ESDCTL_BASE_ADDR;
/* Initialize with default values both CSD0/1 */
writel(0x2000, &esdc->esdctl0);
writel(0x2000, &esdc->esdctl1);
board_setup_sdram_bank(CSD0_BASE_ADDR);
}
static void setup_iomux_uart3(void)
{
static const iomux_v3_cfg_t uart3_pads[] = {
MX35_PAD_RTS2__UART3_RXD_MUX,
MX35_PAD_CTS2__UART3_TXD_MUX,
};
imx_iomux_v3_setup_multiple_pads(uart3_pads, ARRAY_SIZE(uart3_pads));
}
#define I2C_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PUS_100K_DOWN | PAD_CTL_ODE)
static void setup_iomux_i2c(void)
{
static const iomux_v3_cfg_t i2c_pads[] = {
NEW_PAD_CTRL(MX35_PAD_I2C1_CLK__I2C1_SCL, I2C_PAD_CTRL),
NEW_PAD_CTRL(MX35_PAD_I2C1_DAT__I2C1_SDA, I2C_PAD_CTRL),
NEW_PAD_CTRL(MX35_PAD_TX3_RX2__I2C3_SCL, I2C_PAD_CTRL),
NEW_PAD_CTRL(MX35_PAD_TX2_RX3__I2C3_SDA, I2C_PAD_CTRL),
};
imx_iomux_v3_setup_multiple_pads(i2c_pads, ARRAY_SIZE(i2c_pads));
}
static void setup_iomux_spi(void)
{
static const iomux_v3_cfg_t spi_pads[] = {
MX35_PAD_CSPI1_MOSI__CSPI1_MOSI,
MX35_PAD_CSPI1_MISO__CSPI1_MISO,
MX35_PAD_CSPI1_SS0__CSPI1_SS0,
MX35_PAD_CSPI1_SS1__CSPI1_SS1,
MX35_PAD_CSPI1_SCLK__CSPI1_SCLK,
};
imx_iomux_v3_setup_multiple_pads(spi_pads, ARRAY_SIZE(spi_pads));
}
static void setup_iomux_fec(void)
{
static const iomux_v3_cfg_t fec_pads[] = {
MX35_PAD_FEC_TX_CLK__FEC_TX_CLK,
MX35_PAD_FEC_RX_CLK__FEC_RX_CLK,
MX35_PAD_FEC_RX_DV__FEC_RX_DV,
MX35_PAD_FEC_COL__FEC_COL,
MX35_PAD_FEC_RDATA0__FEC_RDATA_0,
MX35_PAD_FEC_TDATA0__FEC_TDATA_0,
MX35_PAD_FEC_TX_EN__FEC_TX_EN,
MX35_PAD_FEC_MDC__FEC_MDC,
MX35_PAD_FEC_MDIO__FEC_MDIO,
MX35_PAD_FEC_TX_ERR__FEC_TX_ERR,
MX35_PAD_FEC_RX_ERR__FEC_RX_ERR,
MX35_PAD_FEC_CRS__FEC_CRS,
MX35_PAD_FEC_RDATA1__FEC_RDATA_1,
MX35_PAD_FEC_TDATA1__FEC_TDATA_1,
MX35_PAD_FEC_RDATA2__FEC_RDATA_2,
MX35_PAD_FEC_TDATA2__FEC_TDATA_2,
MX35_PAD_FEC_RDATA3__FEC_RDATA_3,
MX35_PAD_FEC_TDATA3__FEC_TDATA_3,
};
/* setup pins for FEC */
imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
}
int board_early_init_f(void)
{
struct ccm_regs *ccm =
(struct ccm_regs *)IMX_CCM_BASE;
/* setup GPIO3_1 to set HighVCore signal */
imx_iomux_v3_setup_pad(MX35_PAD_ATA_DA1__GPIO3_1);
gpio_direction_output(65, 1);
/* initialize PLL and clock configuration */
writel(CCM_CCMR_CONFIG, &ccm->ccmr);
writel(CCM_MPLL_532_HZ, &ccm->mpctl);
writel(CCM_PPLL_300_HZ, &ccm->ppctl);
/* Set the core to run at 532 Mhz */
writel(0x00001000, &ccm->pdr0);
/* Set-up RAM */
board_setup_sdram();
/* enable clocks */
writel(readl(&ccm->cgr0) |
MXC_CCM_CGR0_EMI_MASK |
MXC_CCM_CGR0_EDIO_MASK |
MXC_CCM_CGR0_EPIT1_MASK,
&ccm->cgr0);
writel(readl(&ccm->cgr1) |
MXC_CCM_CGR1_FEC_MASK |
MXC_CCM_CGR1_GPIO1_MASK |
MXC_CCM_CGR1_GPIO2_MASK |
MXC_CCM_CGR1_GPIO3_MASK |
MXC_CCM_CGR1_I2C1_MASK |
MXC_CCM_CGR1_I2C2_MASK |
MXC_CCM_CGR1_I2C3_MASK,
&ccm->cgr1);
/* Set-up NAND */
__raw_writel(readl(&ccm->rcsr) | MXC_CCM_RCSR_NFC_FMS, &ccm->rcsr);
/* Set pinmux for the required peripherals */
setup_iomux_uart3();
setup_iomux_i2c();
setup_iomux_fec();
setup_iomux_spi();
return 0;
}
int board_init(void)
{
/* address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
return 0;
}
u32 get_board_rev(void)
{
int rev = 0;
return (get_cpu_rev() & ~(0xF << 8)) | (rev & 0xF) << 8;
}
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