diff options
Diffstat (limited to 'plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c')
-rw-r--r-- | plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c b/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c new file mode 100644 index 0000000..82ce07b --- /dev/null +++ b/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c @@ -0,0 +1,158 @@ +/* + * 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_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 + */ +struct mv_ddr_iface dram_iface_ap0 = { + .ap_base = MVEBU_REGS_BASE_AP(0), + .state = MV_DDR_IFACE_NRDY, + .validation = MV_DDR_MEMORY_CHECK, + .sscg = SSCG_EN, + .id = 0, + .iface_base_addr = 0, + .tm = { + DEBUG_LEVEL_ERROR, + 0x1, /* active interfaces */ + /* cs_mask, mirror, dqs_swap, ck_swap X subphys */ + { { { {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}, + {0x1, 0x0, 0, 0} }, + 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 src */ + 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 */ + { /* rtt_park 1cs */ + MV_DDR_RTT_NOM_PARK_RZQ_DIV4, + /* rtt_park 2cs */ + MV_DDR_RTT_NOM_PARK_RZQ_DIV1 + }, + { /* rtt_wr 1cs */ + MV_DDR_RTT_WR_DYN_ODT_OFF, + /* rtt_wr 2cs */ + MV_DDR_RTT_WR_RZQ_DIV2 + }, + 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 */ + }, + }, + }, +}; + +/* Pointer to the first DRAM interface in the system */ +struct mv_ddr_iface *ptr_iface = &dram_iface_ap0; + +struct mv_ddr_iface *mv_ddr_iface_get(void) +{ + /* Return current ddr interface */ + return ptr_iface; +} + +struct mv_ddr_topology_map *mv_ddr_topology_map_get(void) +{ + /* Return the board topology as defined in the board code */ + return &ptr_iface->tm; +} + +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)); + } +} |