diff options
Diffstat (limited to 'arch/arm/boards/tqmls1046a/lowlevel.c')
| -rw-r--r-- | arch/arm/boards/tqmls1046a/lowlevel.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/arch/arm/boards/tqmls1046a/lowlevel.c b/arch/arm/boards/tqmls1046a/lowlevel.c new file mode 100644 index 0000000000..044d6a418d --- /dev/null +++ b/arch/arm/boards/tqmls1046a/lowlevel.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0+ +#include <common.h> +#include <debug_ll.h> +#include <platform_data/mmc-esdhc-imx.h> +#include <soc/fsl/fsl_ddr_sdram.h> +#include <soc/fsl/immap_lsch2.h> +#include <asm/barebox-arm-head.h> +#include <asm/barebox-arm.h> +#include <asm/syscounter.h> +#include <asm/cache.h> +#include <mach/errata.h> +#include <mach/lowlevel.h> +#include <mach/xload.h> +#include <mach/layerscape.h> + +struct board_specific_parameters { + u32 n_ranks; + u32 datarate_mhz_high; + u32 rank_gb; + u32 clk_adjust; + u32 wrlvl_start; + u32 wrlvl_ctl_2; + u32 wrlvl_ctl_3; +}; + +/* + * These tables contain all valid speeds we want to override with board + * specific parameters. datarate_mhz_high values need to be in ascending order + * for each n_ranks group. + */ +static const struct board_specific_parameters udimm0[] = { + /* + * memory controller 0 + * num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T + * ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay | + */ + {1, 2100, 0, 8, 9, 0x09080806, 0x07060606,}, + {} +}; + +static const struct board_specific_parameters *udimms[] = { + udimm0, +}; + +static void ddr_board_options(memctl_options_t *popts, + struct dimm_params *pdimm, + struct fsl_ddr_controller *c) +{ + const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; + unsigned long ddr_freq; + + if (!pdimm->n_ranks) + return; + + pbsp = udimms[0]; + + /* + * Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr + * freqency and n_banks specified in board_specific_parameters table. + */ + ddr_freq = c->ddr_freq / 1000000; + while (pbsp->datarate_mhz_high) { + if (pbsp->n_ranks == pdimm->n_ranks) { + if (ddr_freq <= pbsp->datarate_mhz_high) { + popts->clk_adjust = pbsp->clk_adjust; + popts->wrlvl_start = pbsp->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + goto found; + } + pbsp_highest = pbsp; + } + pbsp++; + } + + if (pbsp_highest) { + printf("Error: board specific timing not found for %lu MT/s\n", + ddr_freq); + printf("Trying to use the highest speed (%u) parameters\n", + pbsp_highest->datarate_mhz_high); + popts->clk_adjust = pbsp_highest->clk_adjust; + popts->wrlvl_start = pbsp_highest->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + } else { + panic("DIMM is not supported by this board"); + } +found: + debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n", + pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb); + + popts->data_bus_width = 0; /* 64-bit data bus */ + popts->bstopre = 0; /* enable auto precharge */ + + /* + * Factors to consider for half-strength driver enable: + * - number of DIMMs installed + */ + popts->half_strength_driver_enable = 0; + /* + * Write leveling override + */ + popts->wrlvl_override = 1; + popts->wrlvl_sample = 0xf; + + /* + * Rtt and Rtt_WR override + */ + popts->rtt_override = 0; + + /* Enable ZQ calibration */ + popts->zq_en = 1; + + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR4_CDR_ODT_60ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR4_CDR_ODT_60ohm) | + DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2; + + /* optimize cpo for erratum A-009942 */ + popts->cpo_sample = 0x61; +} + +static struct dimm_params dimm_params[] = { + { + .n_ranks = 1, + .rank_density = 2147483648u, + .capacity = 2147483648u, + .primary_sdram_width = 64, + .ec_sdram_width = 8, + .registered_dimm = 0, + .mirrored_dimm = 0, + .n_row_addr = 15, + .n_col_addr = 10, + .bank_addr_bits = 2, + .bank_group_bits = 0, + .edc_config = 2, + .burst_lengths_bitmask = 0x0c, + + .tckmin_x_ps = 833, + .tckmax_ps = 1900, + .caslat_x = 0x000DFA00, // + .taa_ps = 13320, + .trcd_ps = 13320, + .trp_ps = 13320, + .tras_ps = 32000, + .trc_ps = 45320, + .trfc1_ps = 260000, + .trfc2_ps = 160000, + .trfc4_ps = 110000, + .tfaw_ps = 21000, + .trrds_ps = 3300, + .trrdl_ps = 4900, + .tccdl_ps = 5000, + .trfc_slr_ps = 3500000, + .refresh_rate_ps = 7800000, + }, +}; + +static struct fsl_ddr_controller ddrc[] = { + { + .dimm_slots_per_ctrl = ARRAY_SIZE(dimm_params), + .dimm_params = dimm_params, + .memctl_opts.ddrtype = SDRAM_TYPE_DDR4, + .base = IOMEM(LSCH2_DDR_ADDR), + .ddr_freq = LS1046A_DDR_FREQ, + .erratum_A008511 = 1, + .erratum_A009803 = 1, + .erratum_A010165 = 1, + .erratum_A009801 = 1, + .erratum_A009942 = 1, + .chip_selects_per_ctrl = 4, + .board_options = ddr_board_options, + }, +}; + +static struct fsl_ddr_info ls1046a_info = { + .num_ctrls = ARRAY_SIZE(ddrc), + .c = ddrc, +}; + +extern char __dtb_fsl_tqmls1046a_mbls10xxa_start[]; + +static noinline __noreturn void tqmls1046a_r_entry(unsigned long memsize) +{ + unsigned long membase = LS1046A_DDR_SDRAM_BASE; + + if (get_pc() >= membase) { + if (memsize + membase >= 0x100000000) + memsize = 0x100000000 - membase; + + barebox_arm_entry(membase, 0x80000000, + __dtb_fsl_tqmls1046a_mbls10xxa_start); + } + + arm_cpu_lowlevel_init(); + debug_ll_init(); + ls1046a_init_lowlevel(); + + memsize = fsl_ddr_sdram(&ls1046a_info); + + ls1046a_errata_post_ddr(); + + ls1046a_esdhc_start_image(memsize, 0, 0); + + pr_err("Booting failed\n"); + + while (1); +} + +void tqmls1046a_entry(unsigned long r0, unsigned long r1, unsigned long r2); + +__noreturn void tqmls1046a_entry(unsigned long r0, unsigned long r1, unsigned long r2) +{ + relocate_to_current_adr(); + setup_c(); + + tqmls1046a_r_entry(r0); +} |