| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <commonlib/bsd/clamp.h> |
| #include <console/console.h> |
| #include <console/usb.h> |
| #include <cpu/intel/model_206ax/model_206ax.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ops.h> |
| #include <northbridge/intel/sandybridge/chip.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| |
| #include "sandybridge.h" |
| #include "raminit_common.h" |
| #include "raminit_tables.h" |
| |
| #define SNB_MIN_DCLK_133_MULT 3 |
| #define SNB_MAX_DCLK_133_MULT 8 |
| #define IVB_MIN_DCLK_133_MULT 3 |
| #define IVB_MAX_DCLK_133_MULT 10 |
| #define IVB_MIN_DCLK_100_MULT 7 |
| #define IVB_MAX_DCLK_100_MULT 12 |
| |
| /* Frequency multiplier */ |
| static u32 get_FRQ(const ramctr_timing *ctrl) |
| { |
| const u32 FRQ = 256000 / (ctrl->tCK * ctrl->base_freq); |
| |
| if (IS_IVY_CPU(ctrl->cpu)) { |
| if (ctrl->base_freq == 100) |
| return clamp_u32(IVB_MIN_DCLK_100_MULT, FRQ, IVB_MAX_DCLK_100_MULT); |
| |
| if (ctrl->base_freq == 133) |
| return clamp_u32(IVB_MIN_DCLK_133_MULT, FRQ, IVB_MAX_DCLK_133_MULT); |
| |
| } else if (IS_SANDY_CPU(ctrl->cpu)) { |
| if (ctrl->base_freq == 133) |
| return clamp_u32(SNB_MIN_DCLK_133_MULT, FRQ, SNB_MAX_DCLK_133_MULT); |
| } |
| |
| die("Unsupported CPU or base frequency."); |
| } |
| |
| /* CAS write latency. To be programmed in MR2. See DDR3 SPEC for MR2 documentation. */ |
| static u8 get_CWL(u32 tCK) |
| { |
| /* Get CWL based on tCK using the following rule */ |
| switch (tCK) { |
| case TCK_1333MHZ: |
| return 12; |
| |
| case TCK_1200MHZ: |
| case TCK_1100MHZ: |
| return 11; |
| |
| case TCK_1066MHZ: |
| case TCK_1000MHZ: |
| return 10; |
| |
| case TCK_933MHZ: |
| case TCK_900MHZ: |
| return 9; |
| |
| case TCK_800MHZ: |
| case TCK_700MHZ: |
| return 8; |
| |
| case TCK_666MHZ: |
| return 7; |
| |
| case TCK_533MHZ: |
| return 6; |
| |
| default: |
| return 5; |
| } |
| } |
| |
| /* Get REFI based on frequency index, tREFI = 7.8usec */ |
| static u32 get_REFI(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_refi_map[1][FRQ - 7]; |
| |
| else |
| return frq_refi_map[0][FRQ - 3]; |
| } |
| |
| /* Get XSOffset based on frequency index, tXS-Offset: tXS = tRFC + 10ns */ |
| static u8 get_XSOffset(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_xs_map[1][FRQ - 7]; |
| |
| else |
| return frq_xs_map[0][FRQ - 3]; |
| } |
| |
| /* Get MOD based on frequency index */ |
| static u8 get_MOD(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_mod_map[1][FRQ - 7]; |
| |
| else |
| return frq_mod_map[0][FRQ - 3]; |
| } |
| |
| /* Get Write Leveling Output delay based on frequency index */ |
| static u8 get_WLO(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_wlo_map[1][FRQ - 7]; |
| |
| else |
| return frq_wlo_map[0][FRQ - 3]; |
| } |
| |
| /* Get CKE based on frequency index */ |
| static u8 get_CKE(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_cke_map[1][FRQ - 7]; |
| |
| else |
| return frq_cke_map[0][FRQ - 3]; |
| } |
| |
| /* Get XPDLL based on frequency index */ |
| static u8 get_XPDLL(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_xpdll_map[1][FRQ - 7]; |
| |
| else |
| return frq_xpdll_map[0][FRQ - 3]; |
| } |
| |
| /* Get XP based on frequency index */ |
| static u8 get_XP(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_xp_map[1][FRQ - 7]; |
| |
| else |
| return frq_xp_map[0][FRQ - 3]; |
| } |
| |
| /* Get AONPD based on frequency index */ |
| static u8 get_AONPD(u32 FRQ, u8 base_freq) |
| { |
| if (base_freq == 100) |
| return frq_aonpd_map[1][FRQ - 7]; |
| |
| else |
| return frq_aonpd_map[0][FRQ - 3]; |
| } |
| |
| /* Get COMP2 based on CPU generation and clock speed */ |
| static u32 get_COMP2(const ramctr_timing *ctrl) |
| { |
| const bool is_ivybridge = IS_IVY_CPU(ctrl->cpu); |
| |
| if (ctrl->tCK <= TCK_1066MHZ) |
| return is_ivybridge ? 0x0C235924 : 0x0C21410C; |
| else if (ctrl->tCK <= TCK_933MHZ) |
| return is_ivybridge ? 0x0C446964 : 0x0C42514C; |
| else if (ctrl->tCK <= TCK_800MHZ) |
| return is_ivybridge ? 0x0C6671E4 : 0x0C6369CC; |
| else if (ctrl->tCK <= TCK_666MHZ) |
| return is_ivybridge ? 0x0CA8C264 : 0x0CA57A4C; |
| else if (ctrl->tCK <= TCK_533MHZ) |
| return is_ivybridge ? 0x0CEBDB64 : 0x0CE7C34C; |
| else |
| return is_ivybridge ? 0x0D6FF5E4 : 0x0D6BEDCC; |
| } |
| |
| /* Get updated COMP1 based on CPU generation and stepping */ |
| static u32 get_COMP1(ramctr_timing *ctrl, const int channel) |
| { |
| const union comp_ofst_1_reg orig_comp = { |
| .raw = mchbar_read32(CRCOMPOFST1_ch(channel)), |
| }; |
| |
| if (IS_SANDY_CPU(ctrl->cpu) && !IS_SANDY_CPU_D2(ctrl->cpu)) { |
| union comp_ofst_1_reg comp_ofst_1 = orig_comp; |
| |
| comp_ofst_1.clk_odt_up = 1; |
| comp_ofst_1.clk_drv_up = 1; |
| comp_ofst_1.ctl_drv_up = 1; |
| |
| return comp_ofst_1.raw; |
| } |
| |
| /* Fix PCODE COMP offset bug: revert to default values */ |
| union comp_ofst_1_reg comp_ofst_1 = { |
| .dq_odt_down = 4, |
| .dq_odt_up = 4, |
| .clk_odt_down = 4, |
| .clk_odt_up = orig_comp.clk_odt_up, |
| .dq_drv_down = 4, |
| .dq_drv_up = orig_comp.dq_drv_up, |
| .clk_drv_down = 4, |
| .clk_drv_up = orig_comp.clk_drv_up, |
| .ctl_drv_down = 4, |
| .ctl_drv_up = orig_comp.ctl_drv_up, |
| }; |
| |
| if (IS_IVY_CPU(ctrl->cpu)) |
| comp_ofst_1.dq_drv_up = 2; /* 28p6 ohms */ |
| |
| return comp_ofst_1.raw; |
| } |
| |
| static void normalize_tclk(ramctr_timing *ctrl, bool ref_100mhz_support) |
| { |
| if (ctrl->tCK <= TCK_1200MHZ) { |
| ctrl->tCK = TCK_1200MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_1100MHZ) { |
| ctrl->tCK = TCK_1100MHZ; |
| ctrl->base_freq = 100; |
| } else if (ctrl->tCK <= TCK_1066MHZ) { |
| ctrl->tCK = TCK_1066MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_1000MHZ) { |
| ctrl->tCK = TCK_1000MHZ; |
| ctrl->base_freq = 100; |
| } else if (ctrl->tCK <= TCK_933MHZ) { |
| ctrl->tCK = TCK_933MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_900MHZ) { |
| ctrl->tCK = TCK_900MHZ; |
| ctrl->base_freq = 100; |
| } else if (ctrl->tCK <= TCK_800MHZ) { |
| ctrl->tCK = TCK_800MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_700MHZ) { |
| ctrl->tCK = TCK_700MHZ; |
| ctrl->base_freq = 100; |
| } else if (ctrl->tCK <= TCK_666MHZ) { |
| ctrl->tCK = TCK_666MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_533MHZ) { |
| ctrl->tCK = TCK_533MHZ; |
| ctrl->base_freq = 133; |
| } else if (ctrl->tCK <= TCK_400MHZ) { |
| ctrl->tCK = TCK_400MHZ; |
| ctrl->base_freq = 133; |
| } else { |
| ctrl->tCK = 0; |
| return; |
| } |
| |
| if (!ref_100mhz_support && ctrl->base_freq == 100) { |
| /* Skip unsupported frequency */ |
| ctrl->tCK++; |
| normalize_tclk(ctrl, ref_100mhz_support); |
| } |
| } |
| |
| #define DEFAULT_TCK TCK_800MHZ |
| |
| static unsigned int get_mem_min_tck(void) |
| { |
| u32 reg32; |
| u8 rev; |
| const struct northbridge_intel_sandybridge_config *cfg = NULL; |
| |
| /* Actually, config of MCH or Host Bridge */ |
| cfg = config_of_soc(); |
| |
| /* If non-zero, it was set in the devicetree */ |
| if (cfg->max_mem_clock_mhz) { |
| |
| if (cfg->max_mem_clock_mhz >= 1066) |
| return TCK_1066MHZ; |
| |
| else if (cfg->max_mem_clock_mhz >= 933) |
| return TCK_933MHZ; |
| |
| else if (cfg->max_mem_clock_mhz >= 800) |
| return TCK_800MHZ; |
| |
| else if (cfg->max_mem_clock_mhz >= 666) |
| return TCK_666MHZ; |
| |
| else if (cfg->max_mem_clock_mhz >= 533) |
| return TCK_533MHZ; |
| |
| else |
| return TCK_400MHZ; |
| } |
| |
| if (CONFIG(NATIVE_RAMINIT_IGNORE_MAX_MEM_FUSES)) |
| return TCK_1333MHZ; |
| |
| rev = pci_read_config8(HOST_BRIDGE, PCI_DEVICE_ID); |
| |
| if ((rev & BASE_REV_MASK) == BASE_REV_SNB) { |
| /* Read Capabilities A Register DMFC bits */ |
| reg32 = pci_read_config32(HOST_BRIDGE, CAPID0_A); |
| reg32 &= 0x7; |
| |
| switch (reg32) { |
| case 7: return TCK_533MHZ; |
| case 6: return TCK_666MHZ; |
| case 5: return TCK_800MHZ; |
| /* Reserved */ |
| default: |
| break; |
| } |
| } else { |
| /* Read Capabilities B Register DMFC bits */ |
| reg32 = pci_read_config32(HOST_BRIDGE, CAPID0_B); |
| reg32 = (reg32 >> 4) & 0x7; |
| |
| switch (reg32) { |
| case 7: return TCK_533MHZ; |
| case 6: return TCK_666MHZ; |
| case 5: return TCK_800MHZ; |
| case 4: return TCK_933MHZ; |
| case 3: return TCK_1066MHZ; |
| case 2: return TCK_1200MHZ; |
| case 1: return TCK_1333MHZ; |
| /* Reserved */ |
| default: |
| break; |
| } |
| } |
| return DEFAULT_TCK; |
| } |
| |
| static void find_cas_tck(ramctr_timing *ctrl) |
| { |
| u8 val; |
| u32 reg32; |
| u8 ref_100mhz_support; |
| |
| /* 100 MHz reference clock supported */ |
| reg32 = pci_read_config32(HOST_BRIDGE, CAPID0_B); |
| ref_100mhz_support = (reg32 >> 21) & 0x7; |
| printk(BIOS_DEBUG, "100MHz reference clock support: %s\n", ref_100mhz_support ? "yes" |
| : "no"); |
| |
| printk(BIOS_DEBUG, "PLL_REF100_CFG value: 0x%x\n", ref_100mhz_support); |
| |
| ctrl->tCK = get_mem_min_tck(); |
| |
| /* Find CAS latency */ |
| while (1) { |
| /* |
| * Normalising tCK before computing clock could potentially |
| * result in a lower selected CAS, which is desired. |
| */ |
| normalize_tclk(ctrl, ref_100mhz_support); |
| if (!(ctrl->tCK)) |
| die("Couldn't find compatible clock / CAS settings\n"); |
| |
| val = DIV_ROUND_UP(ctrl->tAA, ctrl->tCK); |
| printk(BIOS_DEBUG, "Trying CAS %u, tCK %u.\n", val, ctrl->tCK); |
| for (; val <= MAX_CAS; val++) |
| if ((ctrl->cas_supported >> (val - MIN_CAS)) & 1) |
| break; |
| |
| if (val == (MAX_CAS + 1)) { |
| ctrl->tCK++; |
| continue; |
| } else { |
| printk(BIOS_DEBUG, "Found compatible clock, CAS pair.\n"); |
| break; |
| } |
| } |
| |
| /* Frequency multiplier */ |
| ctrl->FRQ = get_FRQ(ctrl); |
| |
| printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", NS2MHZ_DIV256 / ctrl->tCK); |
| printk(BIOS_DEBUG, "Selected CAS latency : %uT\n", val); |
| ctrl->CAS = val; |
| } |
| |
| static void dram_timing(ramctr_timing *ctrl) |
| { |
| /* |
| * On Sandy Bridge, the maximum supported DDR3 frequency is 1066MHz (DDR3 2133). |
| * Cap it for faster DIMMs, and align it to the closest JEDEC standard frequency. |
| */ |
| /* |
| * On Ivy Bridge, the maximum supported DDR3 frequency is 1400MHz (DDR3 2800). |
| * Cap it at 1200MHz (DDR3 2400), and align it to the closest JEDEC standard frequency. |
| */ |
| if (ctrl->tCK == TCK_1200MHZ) { |
| ctrl->edge_offset[0] = 18; //XXX: guessed |
| ctrl->edge_offset[1] = 8; |
| ctrl->edge_offset[2] = 8; |
| ctrl->tx_dq_offset[0] = 20; //XXX: guessed |
| ctrl->tx_dq_offset[1] = 8; |
| ctrl->tx_dq_offset[2] = 8; |
| ctrl->pi_coding_threshold = 10; |
| |
| } else if (ctrl->tCK == TCK_1100MHZ) { |
| ctrl->edge_offset[0] = 17; //XXX: guessed |
| ctrl->edge_offset[1] = 7; |
| ctrl->edge_offset[2] = 7; |
| ctrl->tx_dq_offset[0] = 19; //XXX: guessed |
| ctrl->tx_dq_offset[1] = 7; |
| ctrl->tx_dq_offset[2] = 7; |
| ctrl->pi_coding_threshold = 13; |
| |
| } else if (ctrl->tCK == TCK_1066MHZ) { |
| ctrl->edge_offset[0] = 16; |
| ctrl->edge_offset[1] = 7; |
| ctrl->edge_offset[2] = 7; |
| ctrl->tx_dq_offset[0] = 18; |
| ctrl->tx_dq_offset[1] = 7; |
| ctrl->tx_dq_offset[2] = 7; |
| ctrl->pi_coding_threshold = 13; |
| |
| } else if (ctrl->tCK == TCK_1000MHZ) { |
| ctrl->edge_offset[0] = 15; //XXX: guessed |
| ctrl->edge_offset[1] = 6; |
| ctrl->edge_offset[2] = 6; |
| ctrl->tx_dq_offset[0] = 17; //XXX: guessed |
| ctrl->tx_dq_offset[1] = 6; |
| ctrl->tx_dq_offset[2] = 6; |
| ctrl->pi_coding_threshold = 13; |
| |
| } else if (ctrl->tCK == TCK_933MHZ) { |
| ctrl->edge_offset[0] = 14; |
| ctrl->edge_offset[1] = 6; |
| ctrl->edge_offset[2] = 6; |
| ctrl->tx_dq_offset[0] = 15; |
| ctrl->tx_dq_offset[1] = 6; |
| ctrl->tx_dq_offset[2] = 6; |
| ctrl->pi_coding_threshold = 15; |
| |
| } else if (ctrl->tCK == TCK_900MHZ) { |
| ctrl->edge_offset[0] = 14; //XXX: guessed |
| ctrl->edge_offset[1] = 6; |
| ctrl->edge_offset[2] = 6; |
| ctrl->tx_dq_offset[0] = 15; //XXX: guessed |
| ctrl->tx_dq_offset[1] = 6; |
| ctrl->tx_dq_offset[2] = 6; |
| ctrl->pi_coding_threshold = 12; |
| |
| } else if (ctrl->tCK == TCK_800MHZ) { |
| ctrl->edge_offset[0] = 13; |
| ctrl->edge_offset[1] = 5; |
| ctrl->edge_offset[2] = 5; |
| ctrl->tx_dq_offset[0] = 14; |
| ctrl->tx_dq_offset[1] = 5; |
| ctrl->tx_dq_offset[2] = 5; |
| ctrl->pi_coding_threshold = 15; |
| |
| } else if (ctrl->tCK == TCK_700MHZ) { |
| ctrl->edge_offset[0] = 13; //XXX: guessed |
| ctrl->edge_offset[1] = 5; |
| ctrl->edge_offset[2] = 5; |
| ctrl->tx_dq_offset[0] = 14; //XXX: guessed |
| ctrl->tx_dq_offset[1] = 5; |
| ctrl->tx_dq_offset[2] = 5; |
| ctrl->pi_coding_threshold = 16; |
| |
| } else if (ctrl->tCK == TCK_666MHZ) { |
| ctrl->edge_offset[0] = 10; |
| ctrl->edge_offset[1] = 4; |
| ctrl->edge_offset[2] = 4; |
| ctrl->tx_dq_offset[0] = 11; |
| ctrl->tx_dq_offset[1] = 4; |
| ctrl->tx_dq_offset[2] = 4; |
| ctrl->pi_coding_threshold = 16; |
| |
| } else if (ctrl->tCK == TCK_533MHZ) { |
| ctrl->edge_offset[0] = 8; |
| ctrl->edge_offset[1] = 3; |
| ctrl->edge_offset[2] = 3; |
| ctrl->tx_dq_offset[0] = 9; |
| ctrl->tx_dq_offset[1] = 3; |
| ctrl->tx_dq_offset[2] = 3; |
| ctrl->pi_coding_threshold = 17; |
| |
| } else { /* TCK_400MHZ */ |
| ctrl->edge_offset[0] = 6; |
| ctrl->edge_offset[1] = 2; |
| ctrl->edge_offset[2] = 2; |
| ctrl->tx_dq_offset[0] = 6; |
| ctrl->tx_dq_offset[1] = 2; |
| ctrl->tx_dq_offset[2] = 2; |
| ctrl->pi_coding_threshold = 17; |
| } |
| |
| /* Initial phase between CLK/CMD pins */ |
| ctrl->pi_code_offset = (256000 / ctrl->tCK) / 66; |
| |
| /* DLL_CONFIG_MDLL_W_TIMER */ |
| ctrl->mdll_wake_delay = (128000 / ctrl->tCK) + 3; |
| |
| if (ctrl->tCWL) |
| ctrl->CWL = DIV_ROUND_UP(ctrl->tCWL, ctrl->tCK); |
| else |
| ctrl->CWL = get_CWL(ctrl->tCK); |
| |
| ctrl->tRCD = DIV_ROUND_UP(ctrl->tRCD, ctrl->tCK); |
| ctrl->tRP = DIV_ROUND_UP(ctrl->tRP, ctrl->tCK); |
| ctrl->tRAS = DIV_ROUND_UP(ctrl->tRAS, ctrl->tCK); |
| ctrl->tWR = DIV_ROUND_UP(ctrl->tWR, ctrl->tCK); |
| ctrl->tFAW = DIV_ROUND_UP(ctrl->tFAW, ctrl->tCK); |
| ctrl->tRRD = DIV_ROUND_UP(ctrl->tRRD, ctrl->tCK); |
| ctrl->tRTP = DIV_ROUND_UP(ctrl->tRTP, ctrl->tCK); |
| ctrl->tWTR = DIV_ROUND_UP(ctrl->tWTR, ctrl->tCK); |
| ctrl->tRFC = DIV_ROUND_UP(ctrl->tRFC, ctrl->tCK); |
| |
| ctrl->tREFI = get_REFI(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tMOD = get_MOD(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tXSOffset = get_XSOffset(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tWLO = get_WLO(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tCKE = get_CKE(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tXPDLL = get_XPDLL(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tXP = get_XP(ctrl->FRQ, ctrl->base_freq); |
| ctrl->tAONPD = get_AONPD(ctrl->FRQ, ctrl->base_freq); |
| |
| printk(BIOS_DEBUG, "Selected CWL latency : %uT\n", ctrl->CWL); |
| printk(BIOS_DEBUG, "Selected tRCD : %uT\n", ctrl->tRCD); |
| printk(BIOS_DEBUG, "Selected tRP : %uT\n", ctrl->tRP); |
| printk(BIOS_DEBUG, "Selected tRAS : %uT\n", ctrl->tRAS); |
| printk(BIOS_DEBUG, "Selected tWR : %uT\n", ctrl->tWR); |
| printk(BIOS_DEBUG, "Selected tFAW : %uT\n", ctrl->tFAW); |
| printk(BIOS_DEBUG, "Selected tRRD : %uT\n", ctrl->tRRD); |
| printk(BIOS_DEBUG, "Selected tRTP : %uT\n", ctrl->tRTP); |
| printk(BIOS_DEBUG, "Selected tWTR : %uT\n", ctrl->tWTR); |
| printk(BIOS_DEBUG, "Selected tRFC : %uT\n", ctrl->tRFC); |
| } |
| |
| static void dram_freq(ramctr_timing *ctrl) |
| { |
| if (ctrl->tCK > TCK_400MHZ) { |
| printk(BIOS_ERR, |
| "DRAM frequency is under lowest supported frequency (400 MHz). " |
| "Increasing to 400 MHz as last resort.\n"); |
| ctrl->tCK = TCK_400MHZ; |
| } |
| |
| while (1) { |
| u8 val2; |
| u32 reg1 = 0; |
| |
| /* Step 1 - Determine target MPLL frequency */ |
| find_cas_tck(ctrl); |
| |
| /* |
| * The MPLL will never lock if the requested frequency is already set. |
| * Exit early to prevent a system hang. |
| */ |
| reg1 = mchbar_read32(MC_BIOS_DATA); |
| val2 = (u8)reg1; |
| if (val2) |
| return; |
| |
| /* Step 2 - Request MPLL frequency through the PCU */ |
| reg1 = ctrl->FRQ; |
| if (ctrl->base_freq == 100) |
| reg1 |= (1 << 8); /* Use 100MHz reference clock */ |
| |
| reg1 |= (1 << 31); /* Set running bit */ |
| mchbar_write32(MC_BIOS_REQ, reg1); |
| int i = 0; |
| printk(BIOS_DEBUG, "MPLL busy... "); |
| while (reg1 & (1 << 31)) { |
| udelay(10); |
| i++; |
| reg1 = mchbar_read32(MC_BIOS_REQ); |
| } |
| printk(BIOS_DEBUG, "done in %d us\n", i * 10); |
| |
| /* Step 3 - Verify lock frequency */ |
| reg1 = mchbar_read32(MC_BIOS_DATA); |
| val2 = (u8)reg1; |
| if (val2 >= ctrl->FRQ) { |
| printk(BIOS_DEBUG, "MPLL frequency is set at : %d MHz\n", |
| (1000 << 8) / ctrl->tCK); |
| return; |
| } |
| printk(BIOS_DEBUG, "MPLL didn't lock. Retrying at lower frequency\n"); |
| ctrl->tCK++; |
| } |
| } |
| |
| static void dram_ioregs(ramctr_timing *ctrl) |
| { |
| int channel; |
| |
| /* IO clock */ |
| FOR_ALL_CHANNELS { |
| mchbar_write32(GDCRCLKRANKSUSED_ch(channel), ctrl->rankmap[channel]); |
| } |
| |
| /* IO command */ |
| FOR_ALL_CHANNELS { |
| mchbar_write32(GDCRCTLRANKSUSED_ch(channel), ctrl->rankmap[channel]); |
| } |
| |
| /* IO control */ |
| FOR_ALL_POPULATED_CHANNELS { |
| program_timings(ctrl, channel); |
| } |
| |
| /* Perform RCOMP */ |
| printram("RCOMP..."); |
| while (!(mchbar_read32(RCOMP_TIMER) & (1 << 16))) |
| ; |
| |
| printram("done\n"); |
| |
| /* Set COMP2 */ |
| mchbar_write32(CRCOMPOFST2, get_COMP2(ctrl)); |
| printram("COMP2 done\n"); |
| |
| /* Set COMP1 */ |
| FOR_ALL_POPULATED_CHANNELS { |
| mchbar_write32(CRCOMPOFST1_ch(channel), get_COMP1(ctrl, channel)); |
| } |
| printram("COMP1 done\n"); |
| |
| printram("FORCE RCOMP and wait 20us..."); |
| mchbar_setbits32(M_COMP, 1 << 8); |
| udelay(20); |
| printram("done\n"); |
| } |
| |
| int try_init_dram_ddr3(ramctr_timing *ctrl, int fast_boot, int s3resume, int me_uma_size) |
| { |
| int err; |
| |
| printk(BIOS_DEBUG, "Starting %s Bridge RAM training (%s).\n", |
| IS_SANDY_CPU(ctrl->cpu) ? "Sandy" : "Ivy", |
| fast_boot ? "fast boot" : "full initialization"); |
| |
| if (!fast_boot) { |
| /* Find fastest common supported parameters */ |
| dram_find_common_params(ctrl); |
| |
| dram_dimm_mapping(ctrl); |
| } |
| |
| /* Set MPLL frequency */ |
| dram_freq(ctrl); |
| |
| if (!fast_boot) { |
| /* Calculate timings */ |
| dram_timing(ctrl); |
| } |
| |
| /* Set version register */ |
| mchbar_write32(MRC_REVISION, 0xc04eb002); |
| |
| /* Enable crossover */ |
| dram_xover(ctrl); |
| |
| /* Set timing and refresh registers */ |
| dram_timing_regs(ctrl); |
| |
| /* Power mode preset */ |
| mchbar_write32(PM_THML_STAT, 0x5500); |
| |
| /* Set scheduler chicken bits */ |
| mchbar_write32(SCHED_CBIT, 0x10100005); |
| |
| /* Set up watermarks and starvation counter */ |
| set_wmm_behavior(ctrl->cpu); |
| |
| /* Clear IO reset bit */ |
| mchbar_clrbits32(MC_INIT_STATE_G, 1 << 5); |
| |
| /* Set MAD-DIMM registers */ |
| dram_dimm_set_mapping(ctrl, 1); |
| printk(BIOS_DEBUG, "Done dimm mapping\n"); |
| |
| /* Zone config */ |
| dram_zones(ctrl, 1); |
| |
| /* Set memory map */ |
| dram_memorymap(ctrl, me_uma_size); |
| printk(BIOS_DEBUG, "Done memory map\n"); |
| |
| /* Set IO registers */ |
| dram_ioregs(ctrl); |
| printk(BIOS_DEBUG, "Done io registers\n"); |
| |
| udelay(1); |
| |
| if (fast_boot) { |
| restore_timings(ctrl); |
| } else { |
| /* Do JEDEC DDR3 reset sequence */ |
| dram_jedecreset(ctrl); |
| printk(BIOS_DEBUG, "Done jedec reset\n"); |
| |
| /* MRS commands */ |
| dram_mrscommands(ctrl); |
| printk(BIOS_DEBUG, "Done MRS commands\n"); |
| |
| /* Prepare for memory training */ |
| prepare_training(ctrl); |
| |
| err = receive_enable_calibration(ctrl); |
| if (err) |
| return err; |
| |
| err = read_mpr_training(ctrl); |
| if (err) |
| return err; |
| |
| err = write_training(ctrl); |
| if (err) |
| return err; |
| |
| printram("CP5a\n"); |
| |
| printram("CP5b\n"); |
| |
| err = command_training(ctrl); |
| if (err) |
| return err; |
| |
| printram("CP5c\n"); |
| |
| err = aggressive_read_training(ctrl); |
| if (err) |
| return err; |
| |
| err = aggressive_write_training(ctrl); |
| if (err) |
| return err; |
| |
| normalize_training(ctrl); |
| } |
| |
| set_read_write_timings(ctrl); |
| |
| if (!s3resume) { |
| err = channel_test(ctrl); |
| if (err) |
| return err; |
| } |
| |
| /* Set MAD-DIMM registers */ |
| dram_dimm_set_mapping(ctrl, 0); |
| |
| return 0; |
| } |