diff options
Diffstat (limited to 'plat/marvell/armada/a8k/a80x0/board/dram_port.c')
| -rw-r--r-- | plat/marvell/armada/a8k/a80x0/board/dram_port.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/plat/marvell/armada/a8k/a80x0/board/dram_port.c b/plat/marvell/armada/a8k/a80x0/board/dram_port.c new file mode 100644 index 0000000..47bc0a8 --- /dev/null +++ b/plat/marvell/armada/a8k/a80x0/board/dram_port.c @@ -0,0 +1,147 @@ +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * SPDX-License-Identifier: BSD-3-Clause + * https://spdx.org/licenses + */ + +#include <arch_helpers.h> +#include <common/debug.h> +#include <drivers/mentor/mi2cv.h> +#include <lib/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 */ +#if DDR32 + MV_DDR_32BIT_ECC_PUP8_BUS_MASK, /* subphys mask */ +#else + MV_DDR_64BIT_ECC_PUP8_BUS_MASK, /* subphys mask */ +#endif + MV_DDR_CFG_SPD, /* ddr configuration data source */ + NOT_COMBINED, /* ddr twin-die combined*/ + { {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, 0); + + /* read data from spd */ + i2c_read(I2C_SPD_ADDR, 0x0, 1, tm->spd_data.all_bytes, + sizeof(tm->spd_data.all_bytes)); + } +} |