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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2019 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <log.h>
#include <asm/arch/iomap.h>
#include <asm/arch/fsp/fsp_configs.h>
#include <asm/arch/fsp/fsp_m_upd.h>
#include <asm/fsp2/fsp_internal.h>
#include <dm/uclass-internal.h>
/*
* ODT settings:
* If ODT PIN to LP4 DRAM is pulled HIGH for ODT_A and HIGH for ODT_B,
* choose ODT_A_B_HIGH_HIGH. If ODT PIN to LP4 DRAM is pulled HIGH for ODT_A
* and LOW for ODT_B, choose ODT_A_B_HIGH_LOW.
*
* Note that the enum values correspond to the interpreted UPD fields
* within Ch[3:0]_OdtConfig parameters.
*/
enum {
ODT_A_B_HIGH_LOW = 0 << 1,
ODT_A_B_HIGH_HIGH = 1 << 1,
N_WR_24 = 1 << 5,
};
/*
* LPDDR4 helper routines for configuring the memory UPD for LPDDR4 operation.
* There are four physical LPDDR4 channels, each 32-bits wide. There are two
* logical channels using two physical channels together to form a 64-bit
* interface to memory for each logical channel.
*/
enum {
LP4_PHYS_CH0A,
LP4_PHYS_CH0B,
LP4_PHYS_CH1A,
LP4_PHYS_CH1B,
LP4_NUM_PHYS_CHANNELS,
};
/*
* The DQs within a physical channel can be bit-swizzled within each byte.
* Within a channel the bytes can be swapped, but the DQs need to be routed
* with the corresponding DQS (strobe).
*/
enum {
LP4_DQS0,
LP4_DQS1,
LP4_DQS2,
LP4_DQS3,
LP4_NUM_BYTE_LANES,
DQ_BITS_PER_DQS = 8,
};
/* Provide bit swizzling per DQS and byte swapping within a channel */
struct lpddr4_chan_swizzle_cfg {
u8 dqs[LP4_NUM_BYTE_LANES][DQ_BITS_PER_DQS];
};
struct lpddr4_swizzle_cfg {
struct lpddr4_chan_swizzle_cfg phys[LP4_NUM_PHYS_CHANNELS];
};
static void setup_sdram(struct fsp_m_config *cfg,
const struct lpddr4_swizzle_cfg *swizzle_cfg)
{
const struct lpddr4_chan_swizzle_cfg *sch;
/* Number of bytes to copy per DQS */
const size_t sz = DQ_BITS_PER_DQS;
int chan;
cfg->memory_down = 1;
cfg->scrambler_support = 1;
cfg->channel_hash_mask = 0x36;
cfg->slice_hash_mask = 9;
cfg->interleaved_mode = 2;
cfg->channels_slices_enable = 0;
cfg->min_ref_rate2x_enable = 0;
cfg->dual_rank_support_enable = 1;
/* LPDDR4 is memory down so no SPD addresses */
cfg->dimm0_spd_address = 0;
cfg->dimm1_spd_address = 0;
for (chan = 0; chan < 4; chan++) {
struct fsp_ram_channel *ch = &cfg->chan[chan];
ch->rank_enable = 1;
ch->device_width = 1;
ch->dram_density = 2;
ch->option = 3;
ch->odt_config = ODT_A_B_HIGH_HIGH;
}
/*
* CH0_DQB byte lanes in the bit swizzle configuration field are
* not 1:1. The mapping within the swizzling field is:
* indices [0:7] - byte lane 1 (DQS1) DQ[8:15]
* indices [8:15] - byte lane 0 (DQS0) DQ[0:7]
* indices [16:23] - byte lane 3 (DQS3) DQ[24:31]
* indices [24:31] - byte lane 2 (DQS2) DQ[16:23]
*/
sch = &swizzle_cfg->phys[LP4_PHYS_CH0B];
memcpy(&cfg->ch_bit_swizzling[0][0], &sch->dqs[LP4_DQS1], sz);
memcpy(&cfg->ch_bit_swizzling[0][8], &sch->dqs[LP4_DQS0], sz);
memcpy(&cfg->ch_bit_swizzling[0][16], &sch->dqs[LP4_DQS3], sz);
memcpy(&cfg->ch_bit_swizzling[0][24], &sch->dqs[LP4_DQS2], sz);
/*
* CH0_DQA byte lanes in the bit swizzle configuration field are 1:1.
*/
sch = &swizzle_cfg->phys[LP4_PHYS_CH0A];
memcpy(&cfg->ch_bit_swizzling[1][0], &sch->dqs[LP4_DQS0], sz);
memcpy(&cfg->ch_bit_swizzling[1][8], &sch->dqs[LP4_DQS1], sz);
memcpy(&cfg->ch_bit_swizzling[1][16], &sch->dqs[LP4_DQS2], sz);
memcpy(&cfg->ch_bit_swizzling[1][24], &sch->dqs[LP4_DQS3], sz);
sch = &swizzle_cfg->phys[LP4_PHYS_CH1B];
memcpy(&cfg->ch_bit_swizzling[2][0], &sch->dqs[LP4_DQS1], sz);
memcpy(&cfg->ch_bit_swizzling[2][8], &sch->dqs[LP4_DQS0], sz);
memcpy(&cfg->ch_bit_swizzling[2][16], &sch->dqs[LP4_DQS3], sz);
memcpy(&cfg->ch_bit_swizzling[2][24], &sch->dqs[LP4_DQS2], sz);
/*
* CH0_DQA byte lanes in the bit swizzle configuration field are 1:1.
*/
sch = &swizzle_cfg->phys[LP4_PHYS_CH1A];
memcpy(&cfg->ch_bit_swizzling[3][0], &sch->dqs[LP4_DQS0], sz);
memcpy(&cfg->ch_bit_swizzling[3][8], &sch->dqs[LP4_DQS1], sz);
memcpy(&cfg->ch_bit_swizzling[3][16], &sch->dqs[LP4_DQS2], sz);
memcpy(&cfg->ch_bit_swizzling[3][24], &sch->dqs[LP4_DQS3], sz);
}
int fspm_update_config(struct udevice *dev, struct fspm_upd *upd)
{
struct fsp_m_config *cfg = &upd->config;
struct fspm_arch_upd *arch = &upd->arch;
arch->nvs_buffer_ptr = NULL;
prepare_mrc_cache(upd);
arch->stack_base = (void *)0xfef96000;
arch->boot_loader_tolum_size = 0;
arch->boot_mode = FSP_BOOT_WITH_FULL_CONFIGURATION;
cfg->serial_debug_port_type = 2;
cfg->serial_debug_port_device = 2;
cfg->serial_debug_port_stride_size = 2;
cfg->serial_debug_port_address = 0;
cfg->package = 1;
/* Don't enforce a memory size limit */
cfg->memory_size_limit = 0;
cfg->low_memory_max_value = 2048; /* 2 GB */
/* No restrictions on memory above 4GiB */
cfg->high_memory_max_value = 0;
/* Always default to attempt to use saved training data */
cfg->disable_fast_boot = 0;
const u8 *swizzle_data;
swizzle_data = dev_read_u8_array_ptr(dev, "lpddr4-swizzle",
LP4_NUM_BYTE_LANES *
DQ_BITS_PER_DQS *
LP4_NUM_PHYS_CHANNELS);
if (!swizzle_data)
return log_msg_ret("Cannot read swizzel data", -EINVAL);
setup_sdram(cfg, (struct lpddr4_swizzle_cfg *)swizzle_data);
cfg->pre_mem_gpio_table_ptr = 0;
cfg->profile = 0xb;
cfg->msg_level_mask = 0;
/* other */
cfg->skip_cse_rbp = 1;
cfg->periodic_retraining_disable = 0;
cfg->enable_s3_heci2 = 0;
return 0;
}
/*
* The FSP-M binary appears to break the SPI controller. It can be fixed by
* writing the BAR again, so do that here
*/
int fspm_done(struct udevice *dev)
{
struct udevice *spi;
int ret;
/* Don't probe the device, since that reads the BAR */
ret = uclass_find_first_device(UCLASS_SPI, &spi);
if (ret)
return log_msg_ret("SPI", ret);
if (!spi)
return log_msg_ret("no SPI", -ENODEV);
dm_pci_write_config32(spi, PCI_BASE_ADDRESS_0,
IOMAP_SPI_BASE | PCI_BASE_ADDRESS_SPACE_MEMORY);
return 0;
}
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