diff options
Diffstat (limited to 'drivers/ddr/marvell/axp/ddr3_sdram.c')
| -rw-r--r-- | drivers/ddr/marvell/axp/ddr3_sdram.c | 669 |
1 files changed, 669 insertions, 0 deletions
diff --git a/drivers/ddr/marvell/axp/ddr3_sdram.c b/drivers/ddr/marvell/axp/ddr3_sdram.c new file mode 100644 index 0000000000..50c1bf8361 --- /dev/null +++ b/drivers/ddr/marvell/axp/ddr3_sdram.c @@ -0,0 +1,669 @@ +/* + * Copyright (C) Marvell International Ltd. and its affiliates + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <i2c.h> +#include <spl.h> +#include <asm/io.h> +#include <asm/arch/cpu.h> +#include <asm/arch/soc.h> + +#include "ddr3_hw_training.h" +#include "xor.h" +#include "xor_regs.h" + +static void ddr3_flush_l1_line(u32 line); + +extern u32 pbs_pattern[2][LEN_16BIT_PBS_PATTERN]; +extern u32 pbs_pattern_32b[2][LEN_PBS_PATTERN]; +#if defined(MV88F78X60) +extern u32 pbs_pattern_64b[2][LEN_PBS_PATTERN]; +#endif +extern u32 pbs_dq_mapping[PUP_NUM_64BIT][DQ_NUM]; + +#if defined(MV88F78X60) || defined(MV88F672X) +/* PBS locked dq (per pup) */ +u32 pbs_locked_dq[MAX_PUP_NUM][DQ_NUM] = { { 0 } }; +u32 pbs_locked_dm[MAX_PUP_NUM] = { 0 }; +u32 pbs_locked_value[MAX_PUP_NUM][DQ_NUM] = { { 0 } }; + +int per_bit_data[MAX_PUP_NUM][DQ_NUM]; +#endif + +static u32 sdram_data[LEN_KILLER_PATTERN] __aligned(32) = { 0 }; + +static struct crc_dma_desc dma_desc __aligned(32) = { 0 }; + +#define XOR_TIMEOUT 0x8000000 + +struct xor_channel_t { + struct crc_dma_desc *desc; + unsigned long desc_phys_addr; +}; + +#define XOR_CAUSE_DONE_MASK(chan) ((0x1 | 0x2) << (chan * 16)) + +void xor_waiton_eng(int chan) +{ + int timeout; + + timeout = 0; + while (!(reg_read(XOR_CAUSE_REG(XOR_UNIT(chan))) & + XOR_CAUSE_DONE_MASK(XOR_CHAN(chan)))) { + if (timeout > XOR_TIMEOUT) + goto timeout; + + timeout++; + } + + timeout = 0; + while (mv_xor_state_get(chan) != MV_IDLE) { + if (timeout > XOR_TIMEOUT) + goto timeout; + + timeout++; + } + + /* Clear int */ + reg_write(XOR_CAUSE_REG(XOR_UNIT(chan)), + ~(XOR_CAUSE_DONE_MASK(XOR_CHAN(chan)))); + +timeout: + return; +} + +static int special_compare_pattern(u32 uj) +{ + if ((uj == 30) || (uj == 31) || (uj == 61) || (uj == 62) || + (uj == 93) || (uj == 94) || (uj == 126) || (uj == 127)) + return 1; + + return 0; +} + +/* + * Compare code extracted as its used by multiple functions. This + * reduces code-size and makes it easier to maintain it. Additionally + * the code is not indented that much and therefore easier to read. + */ +static void compare_pattern_v1(u32 uj, u32 *pup, u32 *pattern, + u32 pup_groups, int debug_dqs) +{ + u32 val; + u32 uk; + u32 var1; + u32 var2; + __maybe_unused u32 dq; + + if (((sdram_data[uj]) != (pattern[uj])) && (*pup != 0xFF)) { + for (uk = 0; uk < PUP_NUM_32BIT; uk++) { + val = CMP_BYTE_SHIFT * uk; + var1 = ((sdram_data[uj] >> val) & CMP_BYTE_MASK); + var2 = ((pattern[uj] >> val) & CMP_BYTE_MASK); + + if (var1 != var2) { + *pup |= (1 << (uk + (PUP_NUM_32BIT * + (uj % pup_groups)))); + +#ifdef MV_DEBUG_DQS + if (!debug_dqs) + continue; + + for (dq = 0; dq < DQ_NUM; dq++) { + val = uk + (PUP_NUM_32BIT * + (uj % pup_groups)); + if (((var1 >> dq) & 0x1) != + ((var2 >> dq) & 0x1)) + per_bit_data[val][dq] = 1; + else + per_bit_data[val][dq] = 0; + } +#endif + } + } + } +} + +static void compare_pattern_v2(u32 uj, u32 *pup, u32 *pattern) +{ + u32 val; + u32 uk; + u32 var1; + u32 var2; + + if (((sdram_data[uj]) != (pattern[uj])) && (*pup != 0x3)) { + /* Found error */ + for (uk = 0; uk < PUP_NUM_32BIT; uk++) { + val = CMP_BYTE_SHIFT * uk; + var1 = (sdram_data[uj] >> val) & CMP_BYTE_MASK; + var2 = (pattern[uj] >> val) & CMP_BYTE_MASK; + if (var1 != var2) + *pup |= (1 << (uk % PUP_NUM_16BIT)); + } + } +} + +/* + * Name: ddr3_sdram_compare + * Desc: Execute compare per PUP + * Args: unlock_pup Bit array of the unlock pups + * new_locked_pup Output bit array of the pups with failed compare + * pattern Pattern to compare + * pattern_len Length of pattern (in bytes) + * sdram_offset offset address to the SDRAM + * write write to the SDRAM before read + * mask compare pattern with mask; + * mask_pattern Mask to compare pattern + * + * Notes: + * Returns: MV_OK if success, other error code if fail. + */ +int ddr3_sdram_compare(MV_DRAM_INFO *dram_info, u32 unlock_pup, + u32 *new_locked_pup, u32 *pattern, + u32 pattern_len, u32 sdram_offset, int write, + int mask, u32 *mask_pattern, + int special_compare) +{ + u32 uj; + __maybe_unused u32 pup_groups; + __maybe_unused u32 dq; + +#if !defined(MV88F67XX) + if (dram_info->num_of_std_pups == PUP_NUM_64BIT) + pup_groups = 2; + else + pup_groups = 1; +#endif + + ddr3_reset_phy_read_fifo(); + + /* Check if need to write to sdram before read */ + if (write == 1) + ddr3_dram_sram_burst((u32)pattern, sdram_offset, pattern_len); + + ddr3_dram_sram_burst(sdram_offset, (u32)sdram_data, pattern_len); + + /* Compare read result to write */ + for (uj = 0; uj < pattern_len; uj++) { + if (special_compare && special_compare_pattern(uj)) + continue; + +#if defined(MV88F78X60) || defined(MV88F672X) + compare_pattern_v1(uj, new_locked_pup, pattern, pup_groups, 1); +#elif defined(MV88F67XX) + compare_pattern_v2(uj, new_locked_pup, pattern); +#endif + } + + return MV_OK; +} + +#if defined(MV88F78X60) || defined(MV88F672X) +/* + * Name: ddr3_sdram_dm_compare + * Desc: Execute compare per PUP + * Args: unlock_pup Bit array of the unlock pups + * new_locked_pup Output bit array of the pups with failed compare + * pattern Pattern to compare + * pattern_len Length of pattern (in bytes) + * sdram_offset offset address to the SDRAM + * write write to the SDRAM before read + * mask compare pattern with mask; + * mask_pattern Mask to compare pattern + * + * Notes: + * Returns: MV_OK if success, other error code if fail. + */ +int ddr3_sdram_dm_compare(MV_DRAM_INFO *dram_info, u32 unlock_pup, + u32 *new_locked_pup, u32 *pattern, + u32 sdram_offset) +{ + u32 uj, uk, var1, var2, pup_groups; + u32 val; + u32 pup = 0; + + if (dram_info->num_of_std_pups == PUP_NUM_64BIT) + pup_groups = 2; + else + pup_groups = 1; + + ddr3_dram_sram_burst((u32)pattern, SDRAM_PBS_TX_OFFS, + LEN_PBS_PATTERN); + ddr3_dram_sram_burst(SDRAM_PBS_TX_OFFS, (u32)sdram_data, + LEN_PBS_PATTERN); + + /* Validate the correctness of the results */ + for (uj = 0; uj < LEN_PBS_PATTERN; uj++) + compare_pattern_v1(uj, &pup, pattern, pup_groups, 0); + + /* Test the DM Signals */ + *(u32 *)(SDRAM_PBS_TX_OFFS + 0x10) = 0x12345678; + *(u32 *)(SDRAM_PBS_TX_OFFS + 0x14) = 0x12345678; + + sdram_data[0] = *(u32 *)(SDRAM_PBS_TX_OFFS + 0x10); + sdram_data[1] = *(u32 *)(SDRAM_PBS_TX_OFFS + 0x14); + + for (uj = 0; uj < 2; uj++) { + if (((sdram_data[uj]) != (pattern[uj])) && + (*new_locked_pup != 0xFF)) { + for (uk = 0; uk < PUP_NUM_32BIT; uk++) { + val = CMP_BYTE_SHIFT * uk; + var1 = ((sdram_data[uj] >> val) & CMP_BYTE_MASK); + var2 = ((pattern[uj] >> val) & CMP_BYTE_MASK); + if (var1 != var2) { + *new_locked_pup |= (1 << (uk + + (PUP_NUM_32BIT * (uj % pup_groups)))); + *new_locked_pup |= pup; + } + } + } + } + + return MV_OK; +} + +/* + * Name: ddr3_sdram_pbs_compare + * Desc: Execute SRAM compare per PUP and DQ. + * Args: pup_locked bit array of locked pups + * is_tx Indicate whether Rx or Tx + * pbs_pattern_idx Index of PBS pattern + * pbs_curr_val The PBS value + * pbs_lock_val The value to set to locked PBS + * skew_array Global array to update with the compare results + * ai_unlock_pup_dq_array bit array of the locked / unlocked pups per dq. + * Notes: + * Returns: MV_OK if success, other error code if fail. + */ +int ddr3_sdram_pbs_compare(MV_DRAM_INFO *dram_info, u32 pup_locked, + int is_tx, u32 pbs_pattern_idx, + u32 pbs_curr_val, u32 pbs_lock_val, + u32 *skew_array, u8 *unlock_pup_dq_array, + u32 ecc) +{ + /* bit array failed dq per pup for current compare */ + u32 pbs_write_pup[DQ_NUM] = { 0 }; + u32 update_pup; /* pup as HW convention */ + u32 max_pup; /* maximal pup index */ + u32 pup_addr; + u32 ui, dq, pup; + int var1, var2; + u32 sdram_offset, pup_groups, tmp_pup; + u32 *pattern_ptr; + u32 val; + + /* Choose pattern */ + switch (dram_info->ddr_width) { +#if defined(MV88F672X) + case 16: + pattern_ptr = (u32 *)&pbs_pattern[pbs_pattern_idx]; + break; +#endif + case 32: + pattern_ptr = (u32 *)&pbs_pattern_32b[pbs_pattern_idx]; + break; +#if defined(MV88F78X60) + case 64: + pattern_ptr = (u32 *)&pbs_pattern_64b[pbs_pattern_idx]; + break; +#endif + default: + return MV_FAIL; + } + + max_pup = dram_info->num_of_std_pups; + + sdram_offset = SDRAM_PBS_I_OFFS + pbs_pattern_idx * SDRAM_PBS_NEXT_OFFS; + + if (dram_info->num_of_std_pups == PUP_NUM_64BIT) + pup_groups = 2; + else + pup_groups = 1; + + ddr3_reset_phy_read_fifo(); + + /* Check if need to write to sdram before read */ + if (is_tx == 1) { + ddr3_dram_sram_burst((u32)pattern_ptr, sdram_offset, + LEN_PBS_PATTERN); + } + + ddr3_dram_sram_read(sdram_offset, (u32)sdram_data, LEN_PBS_PATTERN); + + /* Compare read result to write */ + for (ui = 0; ui < LEN_PBS_PATTERN; ui++) { + if ((sdram_data[ui]) != (pattern_ptr[ui])) { + /* found error */ + /* error in low pup group */ + for (pup = 0; pup < PUP_NUM_32BIT; pup++) { + val = CMP_BYTE_SHIFT * pup; + var1 = ((sdram_data[ui] >> val) & + CMP_BYTE_MASK); + var2 = ((pattern_ptr[ui] >> val) & + CMP_BYTE_MASK); + + if (var1 != var2) { + if (dram_info->ddr_width > 16) { + tmp_pup = (pup + PUP_NUM_32BIT * + (ui % pup_groups)); + } else { + tmp_pup = (pup % PUP_NUM_16BIT); + } + + update_pup = (1 << tmp_pup); + if (ecc && (update_pup != 0x1)) + continue; + + /* + * Pup is failed - Go over all DQs and + * look for failures + */ + for (dq = 0; dq < DQ_NUM; dq++) { + val = tmp_pup * (1 - ecc) + + ecc * ECC_PUP; + if (((var1 >> dq) & 0x1) != + ((var2 >> dq) & 0x1)) { + if (pbs_locked_dq[val][dq] == 1 && + pbs_locked_value[val][dq] != pbs_curr_val) + continue; + + /* + * Activate write to + * update PBS to + * pbs_lock_val + */ + pbs_write_pup[dq] |= + update_pup; + + /* + * Update the + * unlock_pup_dq_array + */ + unlock_pup_dq_array[dq] &= + ~update_pup; + + /* + * Lock PBS value for + * failed bits in + * compare operation + */ + skew_array[tmp_pup * DQ_NUM + dq] = + pbs_curr_val; + } + } + } + } + } + } + + pup_addr = (is_tx == 1) ? PUP_PBS_TX : PUP_PBS_RX; + + /* Set last failed bits PBS to min / max pbs value */ + for (dq = 0; dq < DQ_NUM; dq++) { + for (pup = 0; pup < max_pup; pup++) { + if (pbs_write_pup[dq] & (1 << pup)) { + val = pup * (1 - ecc) + ecc * ECC_PUP; + if (pbs_locked_dq[val][dq] == 1 && + pbs_locked_value[val][dq] != pbs_curr_val) + continue; + + /* Mark the dq as locked */ + pbs_locked_dq[val][dq] = 1; + pbs_locked_value[val][dq] = pbs_curr_val; + ddr3_write_pup_reg(pup_addr + + pbs_dq_mapping[val][dq], + CS0, val, 0, pbs_lock_val); + } + } + } + + return MV_OK; +} +#endif + +/* + * Name: ddr3_sdram_direct_compare + * Desc: Execute compare per PUP without DMA (no burst mode) + * Args: unlock_pup Bit array of the unlock pups + * new_locked_pup Output bit array of the pups with failed compare + * pattern Pattern to compare + * pattern_len Length of pattern (in bytes) + * sdram_offset offset address to the SDRAM + * write write to the SDRAM before read + * mask compare pattern with mask; + * auiMaskPatter Mask to compare pattern + * + * Notes: + * Returns: MV_OK if success, other error code if fail. + */ +int ddr3_sdram_direct_compare(MV_DRAM_INFO *dram_info, u32 unlock_pup, + u32 *new_locked_pup, u32 *pattern, + u32 pattern_len, u32 sdram_offset, + int write, int mask, u32 *mask_pattern) +{ + u32 uj, uk, pup_groups; + u32 *sdram_addr; /* used to read from SDRAM */ + + sdram_addr = (u32 *)sdram_offset; + + if (dram_info->num_of_std_pups == PUP_NUM_64BIT) + pup_groups = 2; + else + pup_groups = 1; + + /* Check if need to write before read */ + if (write == 1) { + for (uk = 0; uk < pattern_len; uk++) { + *sdram_addr = pattern[uk]; + sdram_addr++; + } + } + + sdram_addr = (u32 *)sdram_offset; + + for (uk = 0; uk < pattern_len; uk++) { + sdram_data[uk] = *sdram_addr; + sdram_addr++; + } + + /* Compare read result to write */ + for (uj = 0; uj < pattern_len; uj++) { + if (dram_info->ddr_width > 16) { + compare_pattern_v1(uj, new_locked_pup, pattern, + pup_groups, 0); + } else { + compare_pattern_v2(uj, new_locked_pup, pattern); + } + } + + return MV_OK; +} + +/* + * Name: ddr3_dram_sram_burst + * Desc: Read from the SDRAM in burst of 64 bytes + * Args: src + * dst + * Notes: Using the XOR mechanism + * Returns: MV_OK if success, other error code if fail. + */ +int ddr3_dram_sram_burst(u32 src, u32 dst, u32 len) +{ + u32 chan, byte_count, cs_num, byte; + struct xor_channel_t channel; + + chan = 0; + byte_count = len * 4; + + /* Wait for previous transfer completion */ + while (mv_xor_state_get(chan) != MV_IDLE) + ; + + /* Build the channel descriptor */ + channel.desc = &dma_desc; + + /* Enable Address Override and set correct src and dst */ + if (src < SRAM_BASE) { + /* src is DRAM CS, dst is SRAM */ + cs_num = (src / (1 + SDRAM_CS_SIZE)); + reg_write(XOR_ADDR_OVRD_REG(0, 0), + ((cs_num << 1) | (1 << 0))); + channel.desc->src_addr0 = (src % (1 + SDRAM_CS_SIZE)); + channel.desc->dst_addr = dst; + } else { + /* src is SRAM, dst is DRAM CS */ + cs_num = (dst / (1 + SDRAM_CS_SIZE)); + reg_write(XOR_ADDR_OVRD_REG(0, 0), + ((cs_num << 25) | (1 << 24))); + channel.desc->src_addr0 = (src); + channel.desc->dst_addr = (dst % (1 + SDRAM_CS_SIZE)); + channel.desc->src_addr0 = src; + channel.desc->dst_addr = (dst % (1 + SDRAM_CS_SIZE)); + } + + channel.desc->src_addr1 = 0; + channel.desc->byte_cnt = byte_count; + channel.desc->next_desc_ptr = 0; + channel.desc->status = 1 << 31; + channel.desc->desc_cmd = 0x0; + channel.desc_phys_addr = (unsigned long)&dma_desc; + + ddr3_flush_l1_line((u32)&dma_desc); + + /* Issue the transfer */ + if (mv_xor_transfer(chan, MV_DMA, channel.desc_phys_addr) != MV_OK) + return MV_FAIL; + + /* Wait for completion */ + xor_waiton_eng(chan); + + if (dst > SRAM_BASE) { + for (byte = 0; byte < byte_count; byte += 0x20) + cache_inv(dst + byte); + } + + return MV_OK; +} + +/* + * Name: ddr3_flush_l1_line + * Desc: + * Args: + * Notes: + * Returns: MV_OK if success, other error code if fail. + */ +static void ddr3_flush_l1_line(u32 line) +{ + u32 reg; + +#if defined(MV88F672X) + reg = 1; +#else + reg = reg_read(REG_SAMPLE_RESET_LOW_ADDR) & + (1 << REG_SAMPLE_RESET_CPU_ARCH_OFFS); +#ifdef MV88F67XX + reg = ~reg & (1 << REG_SAMPLE_RESET_CPU_ARCH_OFFS); +#endif +#endif + + if (reg) { + /* V7 Arch mode */ + flush_l1_v7(line); + flush_l1_v7(line + CACHE_LINE_SIZE); + } else { + /* V6 Arch mode */ + flush_l1_v6(line); + flush_l1_v6(line + CACHE_LINE_SIZE); + } +} + +int ddr3_dram_sram_read(u32 src, u32 dst, u32 len) +{ + u32 ui; + u32 *dst_ptr, *src_ptr; + + dst_ptr = (u32 *)dst; + src_ptr = (u32 *)src; + + for (ui = 0; ui < len; ui++) { + *dst_ptr = *src_ptr; + dst_ptr++; + src_ptr++; + } + + return MV_OK; +} + +int ddr3_sdram_dqs_compare(MV_DRAM_INFO *dram_info, u32 unlock_pup, + u32 *new_locked_pup, u32 *pattern, + u32 pattern_len, u32 sdram_offset, int write, + int mask, u32 *mask_pattern, + int special_compare) +{ + u32 uj, pup_groups; + + if (dram_info->num_of_std_pups == PUP_NUM_64BIT) + pup_groups = 2; + else + pup_groups = 1; + + ddr3_reset_phy_read_fifo(); + + /* Check if need to write to sdram before read */ + if (write == 1) + ddr3_dram_sram_burst((u32)pattern, sdram_offset, pattern_len); + + ddr3_dram_sram_burst(sdram_offset, (u32)sdram_data, pattern_len); + + /* Compare read result to write */ + for (uj = 0; uj < pattern_len; uj++) { + if (special_compare && special_compare_pattern(uj)) + continue; + + if (dram_info->ddr_width > 16) { + compare_pattern_v1(uj, new_locked_pup, pattern, + pup_groups, 1); + } else { + compare_pattern_v2(uj, new_locked_pup, pattern); + } + } + + return MV_OK; +} + +void ddr3_reset_phy_read_fifo(void) +{ + u32 reg; + + /* reset read FIFO */ + reg = reg_read(REG_DRAM_TRAINING_ADDR); + /* Start Auto Read Leveling procedure */ + reg |= (1 << REG_DRAM_TRAINING_RL_OFFS); + + /* 0x15B0 - Training Register */ + reg_write(REG_DRAM_TRAINING_ADDR, reg); + + reg = reg_read(REG_DRAM_TRAINING_2_ADDR); + reg |= ((1 << REG_DRAM_TRAINING_2_FIFO_RST_OFFS) + + (1 << REG_DRAM_TRAINING_2_SW_OVRD_OFFS)); + + /* [0] = 1 - Enable SW override, [4] = 1 - FIFO reset */ + /* 0x15B8 - Training SW 2 Register */ + reg_write(REG_DRAM_TRAINING_2_ADDR, reg); + + do { + reg = reg_read(REG_DRAM_TRAINING_2_ADDR) & + (1 << REG_DRAM_TRAINING_2_FIFO_RST_OFFS); + } while (reg); /* Wait for '0' */ + + reg = reg_read(REG_DRAM_TRAINING_ADDR); + + /* Clear Auto Read Leveling procedure */ + reg &= ~(1 << REG_DRAM_TRAINING_RL_OFFS); + + /* 0x15B0 - Training Register */ + reg_write(REG_DRAM_TRAINING_ADDR, reg); +} |