| /* |
| * Copyright (C) Marvell International Ltd. and its affiliates |
| * |
| * SPDX-License-Identifier: GPL-2.0 |
| */ |
| |
| #include <common.h> |
| #include <spl.h> |
| #include <asm/io.h> |
| #include <asm/arch/cpu.h> |
| #include <asm/arch/soc.h> |
| |
| #include "ddr3_init.h" |
| |
| /* List of allowed frequency listed in order of enum hws_ddr_freq */ |
| u32 freq_val[DDR_FREQ_LIMIT] = { |
| 0, /*DDR_FREQ_LOW_FREQ */ |
| 400, /*DDR_FREQ_400, */ |
| 533, /*DDR_FREQ_533, */ |
| 666, /*DDR_FREQ_667, */ |
| 800, /*DDR_FREQ_800, */ |
| 933, /*DDR_FREQ_933, */ |
| 1066, /*DDR_FREQ_1066, */ |
| 311, /*DDR_FREQ_311, */ |
| 333, /*DDR_FREQ_333, */ |
| 467, /*DDR_FREQ_467, */ |
| 850, /*DDR_FREQ_850, */ |
| 600, /*DDR_FREQ_600 */ |
| 300, /*DDR_FREQ_300 */ |
| 900, /*DDR_FREQ_900 */ |
| 360, /*DDR_FREQ_360 */ |
| 1000 /*DDR_FREQ_1000 */ |
| }; |
| |
| /* Table for CL values per frequency for each speed bin index */ |
| struct cl_val_per_freq cas_latency_table[] = { |
| /* |
| * 400M 667M 933M 311M 467M 600M 360 |
| * 100M 533M 800M 1066M 333M 850M 900 |
| * 1000 (the order is 100, 400, 533 etc.) |
| */ |
| /* DDR3-800D */ |
| { {6, 5, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 5, 0, 5, 0} }, |
| /* DDR3-800E */ |
| { {6, 6, 0, 0, 0, 0, 0, 6, 6, 0, 0, 0, 6, 0, 6, 0} }, |
| /* DDR3-1066E */ |
| { {6, 5, 6, 0, 0, 0, 0, 5, 5, 6, 0, 0, 5, 0, 5, 0} }, |
| /* DDR3-1066F */ |
| { {6, 6, 7, 0, 0, 0, 0, 6, 6, 7, 0, 0, 6, 0, 6, 0} }, |
| /* DDR3-1066G */ |
| { {6, 6, 8, 0, 0, 0, 0, 6, 6, 8, 0, 0, 6, 0, 6, 0} }, |
| /* DDR3-1333F* */ |
| { {6, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1333G */ |
| { {6, 5, 7, 8, 0, 0, 0, 5, 5, 7, 0, 8, 5, 0, 5, 0} }, |
| /* DDR3-1333H */ |
| { {6, 6, 8, 9, 0, 0, 0, 6, 6, 8, 0, 9, 6, 0, 6, 0} }, |
| /* DDR3-1333J* */ |
| { {6, 6, 8, 10, 0, 0, 0, 6, 6, 8, 0, 10, 6, 0, 6, 0} |
| /* DDR3-1600G* */}, |
| { {6, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600H */ |
| { {6, 5, 6, 8, 9, 0, 0, 5, 5, 6, 0, 8, 5, 0, 5, 0} }, |
| /* DDR3-1600J */ |
| { {6, 5, 7, 9, 10, 0, 0, 5, 5, 7, 0, 9, 5, 0, 5, 0} }, |
| /* DDR3-1600K */ |
| { {6, 6, 8, 10, 11, 0, 0, 6, 6, 8, 0, 10, 6, 0, 6, 0 } }, |
| /* DDR3-1866J* */ |
| { {6, 5, 6, 8, 9, 11, 0, 5, 5, 6, 11, 8, 5, 0, 5, 0} }, |
| /* DDR3-1866K */ |
| { {6, 5, 7, 8, 10, 11, 0, 5, 5, 7, 11, 8, 5, 11, 5, 11} }, |
| /* DDR3-1866L */ |
| { {6, 6, 7, 9, 11, 12, 0, 6, 6, 7, 12, 9, 6, 12, 6, 12} }, |
| /* DDR3-1866M* */ |
| { {6, 6, 8, 10, 11, 13, 0, 6, 6, 8, 13, 10, 6, 13, 6, 13} }, |
| /* DDR3-2133K* */ |
| { {6, 5, 6, 7, 9, 10, 11, 5, 5, 6, 10, 7, 5, 11, 5, 11} }, |
| /* DDR3-2133L */ |
| { {6, 5, 6, 8, 9, 11, 12, 5, 5, 6, 11, 8, 5, 12, 5, 12} }, |
| /* DDR3-2133M */ |
| { {6, 5, 7, 9, 10, 12, 13, 5, 5, 7, 12, 9, 5, 13, 5, 13} }, |
| /* DDR3-2133N* */ |
| { {6, 6, 7, 9, 11, 13, 14, 6, 6, 7, 13, 9, 6, 14, 6, 14} }, |
| /* DDR3-1333H-ext */ |
| { {6, 6, 7, 9, 0, 0, 0, 6, 6, 7, 0, 9, 6, 0, 6, 0} }, |
| /* DDR3-1600K-ext */ |
| { {6, 6, 7, 9, 11, 0, 0, 6, 6, 7, 0, 9, 6, 0, 6, 0} }, |
| /* DDR3-1866M-ext */ |
| { {6, 6, 7, 9, 11, 13, 0, 6, 6, 7, 13, 9, 6, 13, 6, 13} }, |
| }; |
| |
| /* Table for CWL values per speedbin index */ |
| struct cl_val_per_freq cas_write_latency_table[] = { |
| /* |
| * 400M 667M 933M 311M 467M 600M 360 |
| * 100M 533M 800M 1066M 333M 850M 900 |
| * (the order is 100, 400, 533 etc.) |
| */ |
| /* DDR3-800D */ |
| { {5, 5, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 5, 0, 5, 0} }, |
| /* DDR3-800E */ |
| { {5, 5, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 5, 0, 5, 0} }, |
| /* DDR3-1066E */ |
| { {5, 5, 6, 0, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1066F */ |
| { {5, 5, 6, 0, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1066G */ |
| { {5, 5, 6, 0, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1333F* */ |
| { {5, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1333G */ |
| { {5, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1333H */ |
| { {5, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1333J* */ |
| { {5, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600G* */ |
| { {5, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600H */ |
| { {5, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600J */ |
| { {5, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600K */ |
| { {5, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1866J* */ |
| { {5, 5, 6, 7, 8, 9, 0, 5, 5, 6, 9, 7, 5, 0, 5, 0} }, |
| /* DDR3-1866K */ |
| { {5, 5, 6, 7, 8, 9, 0, 5, 5, 6, 9, 7, 5, 0, 5, 0} }, |
| /* DDR3-1866L */ |
| { {5, 5, 6, 7, 8, 9, 0, 5, 5, 6, 9, 7, 5, 9, 5, 9} }, |
| /* DDR3-1866M* */ |
| { {5, 5, 6, 7, 8, 9, 0, 5, 5, 6, 9, 7, 5, 9, 5, 9} }, |
| /* DDR3-2133K* */ |
| { {5, 5, 6, 7, 8, 9, 10, 5, 5, 6, 9, 7, 5, 9, 5, 10} }, |
| /* DDR3-2133L */ |
| { {5, 5, 6, 7, 8, 9, 10, 5, 5, 6, 9, 7, 5, 9, 5, 10} }, |
| /* DDR3-2133M */ |
| { {5, 5, 6, 7, 8, 9, 10, 5, 5, 6, 9, 7, 5, 9, 5, 10} }, |
| /* DDR3-2133N* */ |
| { {5, 5, 6, 7, 8, 9, 10, 5, 5, 6, 9, 7, 5, 9, 5, 10} }, |
| /* DDR3-1333H-ext */ |
| { {5, 5, 6, 7, 0, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1600K-ext */ |
| { {5, 5, 6, 7, 8, 0, 0, 5, 5, 6, 0, 7, 5, 0, 5, 0} }, |
| /* DDR3-1866M-ext */ |
| { {5, 5, 6, 7, 8, 9, 0, 5, 5, 6, 9, 7, 5, 9, 5, 9} }, |
| }; |
| |
| u8 twr_mask_table[] = { |
| 10, |
| 10, |
| 10, |
| 10, |
| 10, |
| 1, /*5*/ |
| 2, /*6*/ |
| 3, /*7*/ |
| 4, /*8*/ |
| 10, |
| 5, /*10*/ |
| 10, |
| 6, /*12*/ |
| 10, |
| 7, /*14*/ |
| 10, |
| 0 /*16*/ |
| }; |
| |
| u8 cl_mask_table[] = { |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0x2, |
| 0x4, |
| 0x6, |
| 0x8, |
| 0xa, |
| 0xc, |
| 0xe, |
| 0x1, |
| 0x3, |
| 0x5, |
| 0x5 |
| }; |
| |
| u8 cwl_mask_table[] = { |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0x1, |
| 0x2, |
| 0x3, |
| 0x4, |
| 0x5, |
| 0x6, |
| 0x7, |
| 0x8, |
| 0x9, |
| 0x9 |
| }; |
| |
| /* RFC values (in ns) */ |
| u16 rfc_table[] = { |
| 90, /* 512M */ |
| 110, /* 1G */ |
| 160, /* 2G */ |
| 260, /* 4G */ |
| 350 /* 8G */ |
| }; |
| |
| u32 speed_bin_table_t_rc[] = { |
| 50000, |
| 52500, |
| 48750, |
| 50625, |
| 52500, |
| 46500, |
| 48000, |
| 49500, |
| 51000, |
| 45000, |
| 46250, |
| 47500, |
| 48750, |
| 44700, |
| 45770, |
| 46840, |
| 47910, |
| 43285, |
| 44220, |
| 45155, |
| 46900 |
| }; |
| |
| u32 speed_bin_table_t_rcd_t_rp[] = { |
| 12500, |
| 15000, |
| 11250, |
| 13125, |
| 15000, |
| 10500, |
| 12000, |
| 13500, |
| 15000, |
| 10000, |
| 11250, |
| 12500, |
| 13750, |
| 10700, |
| 11770, |
| 12840, |
| 13910, |
| 10285, |
| 11022, |
| 12155, |
| 13090, |
| }; |
| |
| enum { |
| PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_AGGRESSOR = 0, |
| PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM |
| }; |
| |
| static u8 pattern_killer_pattern_table_map[KILLER_PATTERN_LENGTH * 2][2] = { |
| /*Aggressor / Victim */ |
| {1, 0}, |
| {0, 0}, |
| {1, 0}, |
| {1, 1}, |
| {0, 1}, |
| {0, 1}, |
| {1, 0}, |
| {0, 1}, |
| {1, 0}, |
| {0, 1}, |
| {1, 0}, |
| {1, 0}, |
| {0, 1}, |
| {1, 0}, |
| {0, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {1, 0}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {0, 0}, |
| {0, 0}, |
| {0, 1}, |
| {0, 1}, |
| {1, 1}, |
| {0, 0}, |
| {0, 0}, |
| {1, 1}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {1, 1}, |
| {0, 0}, |
| {0, 0}, |
| {1, 1}, |
| {0, 0}, |
| {1, 1}, |
| {0, 1}, |
| {0, 0}, |
| {0, 1}, |
| {0, 1}, |
| {0, 0}, |
| {1, 1}, |
| {1, 1}, |
| {1, 0}, |
| {1, 0}, |
| {1, 1}, |
| {1, 1}, |
| {1, 1}, |
| {1, 1}, |
| {1, 1}, |
| {1, 1}, |
| {1, 1} |
| }; |
| |
| static u8 pattern_vref_pattern_table_map[] = { |
| /* 1 means 0xffffffff, 0 is 0x0 */ |
| 0xb8, |
| 0x52, |
| 0x55, |
| 0x8a, |
| 0x33, |
| 0xa6, |
| 0x6d, |
| 0xfe |
| }; |
| |
| /* Return speed Bin value for selected index and t* element */ |
| u32 speed_bin_table(u8 index, enum speed_bin_table_elements element) |
| { |
| u32 result = 0; |
| |
| switch (element) { |
| case SPEED_BIN_TRCD: |
| case SPEED_BIN_TRP: |
| result = speed_bin_table_t_rcd_t_rp[index]; |
| break; |
| case SPEED_BIN_TRAS: |
| if (index < 6) |
| result = 37500; |
| else if (index < 10) |
| result = 36000; |
| else if (index < 14) |
| result = 35000; |
| else if (index < 18) |
| result = 34000; |
| else |
| result = 33000; |
| break; |
| case SPEED_BIN_TRC: |
| result = speed_bin_table_t_rc[index]; |
| break; |
| case SPEED_BIN_TRRD1K: |
| if (index < 3) |
| result = 10000; |
| else if (index < 6) |
| result = 7005; |
| else if (index < 14) |
| result = 6000; |
| else |
| result = 5000; |
| break; |
| case SPEED_BIN_TRRD2K: |
| if (index < 6) |
| result = 10000; |
| else if (index < 14) |
| result = 7005; |
| else |
| result = 6000; |
| break; |
| case SPEED_BIN_TPD: |
| if (index < 3) |
| result = 7500; |
| else if (index < 10) |
| result = 5625; |
| else |
| result = 5000; |
| break; |
| case SPEED_BIN_TFAW1K: |
| if (index < 3) |
| result = 40000; |
| else if (index < 6) |
| result = 37500; |
| else if (index < 14) |
| result = 30000; |
| else if (index < 18) |
| result = 27000; |
| else |
| result = 25000; |
| break; |
| case SPEED_BIN_TFAW2K: |
| if (index < 6) |
| result = 50000; |
| else if (index < 10) |
| result = 45000; |
| else if (index < 14) |
| result = 40000; |
| else |
| result = 35000; |
| break; |
| case SPEED_BIN_TWTR: |
| result = 7500; |
| break; |
| case SPEED_BIN_TRTP: |
| result = 7500; |
| break; |
| case SPEED_BIN_TWR: |
| result = 15000; |
| break; |
| case SPEED_BIN_TMOD: |
| result = 15000; |
| break; |
| case SPEED_BIN_TXPDLL: |
| result = 24000; |
| break; |
| default: |
| break; |
| } |
| |
| return result; |
| } |
| |
| static inline u32 pattern_table_get_killer_word(u8 dqs, u8 index) |
| { |
| u8 i, byte = 0; |
| u8 role; |
| |
| for (i = 0; i < 8; i++) { |
| role = (i == dqs) ? |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_AGGRESSOR) : |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM); |
| byte |= pattern_killer_pattern_table_map[index][role] << i; |
| } |
| |
| return byte | (byte << 8) | (byte << 16) | (byte << 24); |
| } |
| |
| static inline u32 pattern_table_get_killer_word16(u8 dqs, u8 index) |
| { |
| u8 i, byte0 = 0, byte1 = 0; |
| u8 role; |
| |
| for (i = 0; i < 8; i++) { |
| role = (i == dqs) ? |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_AGGRESSOR) : |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM); |
| byte0 |= pattern_killer_pattern_table_map[index * 2][role] << i; |
| } |
| |
| for (i = 0; i < 8; i++) { |
| role = (i == dqs) ? |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_AGGRESSOR) : |
| (PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM); |
| byte1 |= pattern_killer_pattern_table_map |
| [index * 2 + 1][role] << i; |
| } |
| |
| return byte0 | (byte0 << 8) | (byte1 << 16) | (byte1 << 24); |
| } |
| |
| static inline u32 pattern_table_get_sso_word(u8 sso, u8 index) |
| { |
| u8 step = sso + 1; |
| |
| if (0 == ((index / step) & 1)) |
| return 0x0; |
| else |
| return 0xffffffff; |
| } |
| |
| static inline u32 pattern_table_get_vref_word(u8 index) |
| { |
| if (0 == ((pattern_vref_pattern_table_map[index / 8] >> |
| (index % 8)) & 1)) |
| return 0x0; |
| else |
| return 0xffffffff; |
| } |
| |
| static inline u32 pattern_table_get_vref_word16(u8 index) |
| { |
| if (0 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2] && |
| 0 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2 + 1]) |
| return 0x00000000; |
| else if (1 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2] && |
| 0 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2 + 1]) |
| return 0xffff0000; |
| else if (0 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2] && |
| 1 == pattern_killer_pattern_table_map |
| [PATTERN_KILLER_PATTERN_TABLE_MAP_ROLE_VICTIM][index * 2 + 1]) |
| return 0x0000ffff; |
| else |
| return 0xffffffff; |
| } |
| |
| static inline u32 pattern_table_get_static_pbs_word(u8 index) |
| { |
| u16 temp; |
| |
| temp = ((0x00ff << (index / 3)) & 0xff00) >> 8; |
| |
| return temp | (temp << 8) | (temp << 16) | (temp << 24); |
| } |
| |
| inline u32 pattern_table_get_word(u32 dev_num, enum hws_pattern type, u8 index) |
| { |
| u32 pattern; |
| struct hws_topology_map *tm = ddr3_get_topology_map(); |
| |
| if (DDR3_IS_16BIT_DRAM_MODE(tm->bus_act_mask) == 0) { |
| /* 32bit patterns */ |
| switch (type) { |
| case PATTERN_PBS1: |
| case PATTERN_PBS2: |
| if (index == 0 || index == 2 || index == 5 || |
| index == 7) |
| pattern = PATTERN_55; |
| else |
| pattern = PATTERN_AA; |
| break; |
| case PATTERN_PBS3: |
| if (0 == (index & 1)) |
| pattern = PATTERN_55; |
| else |
| pattern = PATTERN_AA; |
| break; |
| case PATTERN_RL: |
| if (index < 6) |
| pattern = PATTERN_00; |
| else |
| pattern = PATTERN_80; |
| break; |
| case PATTERN_STATIC_PBS: |
| pattern = pattern_table_get_static_pbs_word(index); |
| break; |
| case PATTERN_KILLER_DQ0: |
| case PATTERN_KILLER_DQ1: |
| case PATTERN_KILLER_DQ2: |
| case PATTERN_KILLER_DQ3: |
| case PATTERN_KILLER_DQ4: |
| case PATTERN_KILLER_DQ5: |
| case PATTERN_KILLER_DQ6: |
| case PATTERN_KILLER_DQ7: |
| pattern = pattern_table_get_killer_word( |
| (u8)(type - PATTERN_KILLER_DQ0), index); |
| break; |
| case PATTERN_RL2: |
| if (index < 6) |
| pattern = PATTERN_00; |
| else |
| pattern = PATTERN_01; |
| break; |
| case PATTERN_TEST: |
| if (index > 1 && index < 6) |
| pattern = PATTERN_20; |
| else |
| pattern = PATTERN_00; |
| break; |
| case PATTERN_FULL_SSO0: |
| case PATTERN_FULL_SSO1: |
| case PATTERN_FULL_SSO2: |
| case PATTERN_FULL_SSO3: |
| pattern = pattern_table_get_sso_word( |
| (u8)(type - PATTERN_FULL_SSO0), index); |
| break; |
| case PATTERN_VREF: |
| pattern = pattern_table_get_vref_word(index); |
| break; |
| default: |
| pattern = 0; |
| break; |
| } |
| } else { |
| /* 16bit patterns */ |
| switch (type) { |
| case PATTERN_PBS1: |
| case PATTERN_PBS2: |
| case PATTERN_PBS3: |
| pattern = PATTERN_55AA; |
| break; |
| case PATTERN_RL: |
| if (index < 3) |
| pattern = PATTERN_00; |
| else |
| pattern = PATTERN_80; |
| break; |
| case PATTERN_STATIC_PBS: |
| pattern = PATTERN_00FF; |
| break; |
| case PATTERN_KILLER_DQ0: |
| case PATTERN_KILLER_DQ1: |
| case PATTERN_KILLER_DQ2: |
| case PATTERN_KILLER_DQ3: |
| case PATTERN_KILLER_DQ4: |
| case PATTERN_KILLER_DQ5: |
| case PATTERN_KILLER_DQ6: |
| case PATTERN_KILLER_DQ7: |
| pattern = pattern_table_get_killer_word16( |
| (u8)(type - PATTERN_KILLER_DQ0), index); |
| break; |
| case PATTERN_RL2: |
| if (index < 3) |
| pattern = PATTERN_00; |
| else |
| pattern = PATTERN_01; |
| break; |
| case PATTERN_TEST: |
| pattern = PATTERN_0080; |
| break; |
| case PATTERN_FULL_SSO0: |
| pattern = 0x0000ffff; |
| break; |
| case PATTERN_FULL_SSO1: |
| case PATTERN_FULL_SSO2: |
| case PATTERN_FULL_SSO3: |
| pattern = pattern_table_get_sso_word( |
| (u8)(type - PATTERN_FULL_SSO1), index); |
| break; |
| case PATTERN_VREF: |
| pattern = pattern_table_get_vref_word16(index); |
| break; |
| default: |
| pattern = 0; |
| break; |
| } |
| } |
| |
| return pattern; |
| } |