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/*
* Copyright (C) 2018 Marvell International Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
* https://spdx.org/licenses
*/
#include <arch_helpers.h>
#include <a8k_i2c.h>
#include <debug.h>
#include <mmio.h>
#include <mv_ddr_if.h>
#include <mvebu_def.h>
#include <plat_marvell.h>
#define MVEBU_AP_MPP_CTRL0_7_REG MVEBU_AP_MPP_REGS(0)
#define MVEBU_AP_MPP_CTRL4_OFFS 16
#define MVEBU_AP_MPP_CTRL5_OFFS 20
#define MVEBU_AP_MPP_CTRL4_I2C0_SDA_ENA 0x3
#define MVEBU_AP_MPP_CTRL5_I2C0_SCK_ENA 0x3
#define MVEBU_CP_MPP_CTRL37_OFFS 20
#define MVEBU_CP_MPP_CTRL38_OFFS 24
#define MVEBU_CP_MPP_CTRL37_I2C0_SCK_ENA 0x2
#define MVEBU_CP_MPP_CTRL38_I2C0_SDA_ENA 0x2
#define MVEBU_MPP_CTRL_MASK 0xf
/*
* This struct provides the DRAM training code with
* the appropriate board DRAM configuration
*/
static struct mv_ddr_topology_map board_topology_map = {
/* MISL board with 1CS 8Gb x4 devices of Micron 2400T */
DEBUG_LEVEL_ERROR,
0x1, /* active interfaces */
/* cs_mask, mirror, dqs_swap, ck_swap X subphys */
{ { { {0x1, 0x0, 0, 0}, /* FIXME: change the cs mask for all 64 bit */
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0},
{0x1, 0x0, 0, 0} },
/* TODO: double check if the speed bin is 2400T */
SPEED_BIN_DDR_2400T, /* speed_bin */
MV_DDR_DEV_WIDTH_8BIT, /* sdram device width */
MV_DDR_DIE_CAP_8GBIT, /* die capacity */
MV_DDR_FREQ_SAR, /* frequency */
0, 0, /* cas_l, cas_wl */
MV_DDR_TEMP_LOW} }, /* temperature */
MV_DDR_64BIT_ECC_PUP8_BUS_MASK, /* subphys mask */
MV_DDR_CFG_SPD, /* ddr configuration data source */
{ {0} }, /* raw spd data */
{0}, /* timing parameters */
{ /* electrical configuration */
{ /* memory electrical configuration */
MV_DDR_RTT_NOM_PARK_RZQ_DISABLE, /* rtt_nom */
{
MV_DDR_RTT_NOM_PARK_RZQ_DIV4, /* rtt_park 1cs */
MV_DDR_RTT_NOM_PARK_RZQ_DIV1 /* rtt_park 2cs */
},
{
MV_DDR_RTT_WR_DYN_ODT_OFF, /* rtt_wr 1cs */
MV_DDR_RTT_WR_RZQ_DIV2 /* rtt_wr 2cs */
},
MV_DDR_DIC_RZQ_DIV7 /* dic */
},
{ /* phy electrical configuration */
MV_DDR_OHM_30, /* data_drv_p */
MV_DDR_OHM_30, /* data_drv_n */
MV_DDR_OHM_30, /* ctrl_drv_p */
MV_DDR_OHM_30, /* ctrl_drv_n */
{
MV_DDR_OHM_60, /* odt_p 1cs */
MV_DDR_OHM_120 /* odt_p 2cs */
},
{
MV_DDR_OHM_60, /* odt_n 1cs */
MV_DDR_OHM_120 /* odt_n 2cs */
},
},
{ /* mac electrical configuration */
MV_DDR_ODT_CFG_NORMAL, /* odtcfg_pattern */
MV_DDR_ODT_CFG_ALWAYS_ON, /* odtcfg_write */
MV_DDR_ODT_CFG_NORMAL, /* odtcfg_read */
},
}
};
struct mv_ddr_topology_map *mv_ddr_topology_map_get(void)
{
/* Return the board topology as defined in the board code */
return &board_topology_map;
}
static void mpp_config(void)
{
uintptr_t reg;
uint32_t val;
reg = MVEBU_CP_MPP_REGS(0, 4);
/* configure CP0 MPP 37 and 38 to i2c */
val = mmio_read_32(reg);
val &= ~((MVEBU_MPP_CTRL_MASK << MVEBU_CP_MPP_CTRL37_OFFS) |
(MVEBU_MPP_CTRL_MASK << MVEBU_CP_MPP_CTRL38_OFFS));
val |= (MVEBU_CP_MPP_CTRL37_I2C0_SCK_ENA <<
MVEBU_CP_MPP_CTRL37_OFFS) |
(MVEBU_CP_MPP_CTRL38_I2C0_SDA_ENA <<
MVEBU_CP_MPP_CTRL38_OFFS);
mmio_write_32(reg, val);
}
/*
* This function may modify the default DRAM parameters
* based on information received from SPD or bootloader
* configuration located on non volatile storage
*/
void plat_marvell_dram_update_topology(void)
{
struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
INFO("Gathering DRAM information\n");
if (tm->cfg_src == MV_DDR_CFG_SPD) {
/* configure MPPs to enable i2c */
mpp_config();
/* initialize i2c */
i2c_init((void *)MVEBU_CP0_I2C_BASE);
/* select SPD memory page 0 to access DRAM configuration */
i2c_write(I2C_SPD_P0_ADDR, 0x0, 1, tm->spd_data.all_bytes, 1);
/* read data from spd */
i2c_read(I2C_SPD_ADDR, 0x0, 1, tm->spd_data.all_bytes,
sizeof(tm->spd_data.all_bytes));
}
}
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