| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2015-2020, NVIDIA CORPORATION. All rights reserved. |
| */ |
| |
| #include <linux/bitfield.h> |
| #include <linux/clk.h> |
| #include <linux/clk/tegra.h> |
| #include <linux/debugfs.h> |
| #include <linux/delay.h> |
| #include <linux/kernel.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/module.h> |
| #include <linux/of_reserved_mem.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/thermal.h> |
| #include <soc/tegra/fuse.h> |
| #include <soc/tegra/mc.h> |
| |
| #include "tegra210-emc.h" |
| #include "tegra210-mc.h" |
| |
| /* CLK_RST_CONTROLLER_CLK_SOURCE_EMC */ |
| #define EMC_CLK_EMC_2X_CLK_SRC_SHIFT 29 |
| #define EMC_CLK_EMC_2X_CLK_SRC_MASK \ |
| (0x7 << EMC_CLK_EMC_2X_CLK_SRC_SHIFT) |
| #define EMC_CLK_SOURCE_PLLM_LJ 0x4 |
| #define EMC_CLK_SOURCE_PLLMB_LJ 0x5 |
| #define EMC_CLK_FORCE_CC_TRIGGER BIT(27) |
| #define EMC_CLK_MC_EMC_SAME_FREQ BIT(16) |
| #define EMC_CLK_EMC_2X_CLK_DIVISOR_SHIFT 0 |
| #define EMC_CLK_EMC_2X_CLK_DIVISOR_MASK \ |
| (0xff << EMC_CLK_EMC_2X_CLK_DIVISOR_SHIFT) |
| |
| /* CLK_RST_CONTROLLER_CLK_SOURCE_EMC_DLL */ |
| #define DLL_CLK_EMC_DLL_CLK_SRC_SHIFT 29 |
| #define DLL_CLK_EMC_DLL_CLK_SRC_MASK \ |
| (0x7 << DLL_CLK_EMC_DLL_CLK_SRC_SHIFT) |
| #define DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT 10 |
| #define DLL_CLK_EMC_DLL_DDLL_CLK_SEL_MASK \ |
| (0x3 << DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT) |
| #define PLLM_VCOA 0 |
| #define PLLM_VCOB 1 |
| #define EMC_DLL_SWITCH_OUT 2 |
| #define DLL_CLK_EMC_DLL_CLK_DIVISOR_SHIFT 0 |
| #define DLL_CLK_EMC_DLL_CLK_DIVISOR_MASK \ |
| (0xff << DLL_CLK_EMC_DLL_CLK_DIVISOR_SHIFT) |
| |
| /* MC_EMEM_ARB_MISC0 */ |
| #define MC_EMEM_ARB_MISC0_EMC_SAME_FREQ BIT(27) |
| |
| /* EMC_DATA_BRLSHFT_X */ |
| #define EMC0_EMC_DATA_BRLSHFT_0_INDEX 2 |
| #define EMC1_EMC_DATA_BRLSHFT_0_INDEX 3 |
| #define EMC0_EMC_DATA_BRLSHFT_1_INDEX 4 |
| #define EMC1_EMC_DATA_BRLSHFT_1_INDEX 5 |
| |
| #define TRIM_REG(chan, rank, reg, byte) \ |
| (((EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ## reg ## \ |
| _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte ## _MASK & \ |
| next->trim_regs[EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## \ |
| rank ## _ ## reg ## _INDEX]) >> \ |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ## reg ## \ |
| _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte ## _SHIFT) \ |
| + \ |
| (((EMC_DATA_BRLSHFT_ ## rank ## _RANK ## rank ## _BYTE ## \ |
| byte ## _DATA_BRLSHFT_MASK & \ |
| next->trim_perch_regs[EMC ## chan ## \ |
| _EMC_DATA_BRLSHFT_ ## rank ## _INDEX]) >> \ |
| EMC_DATA_BRLSHFT_ ## rank ## _RANK ## rank ## _BYTE ## \ |
| byte ## _DATA_BRLSHFT_SHIFT) * 64)) |
| |
| #define CALC_TEMP(rank, reg, byte1, byte2, n) \ |
| (((new[n] << EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ## \ |
| reg ## _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte1 ## _SHIFT) & \ |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ## reg ## \ |
| _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte1 ## _MASK) \ |
| | \ |
| ((new[n + 1] << EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ##\ |
| reg ## _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte2 ## _SHIFT) & \ |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK ## rank ## _ ## reg ## \ |
| _OB_DDLL_LONG_DQ_RANK ## rank ## _BYTE ## byte2 ## _MASK)) |
| |
| #define REFRESH_SPEEDUP(value, speedup) \ |
| (((value) & 0xffff0000) | ((value) & 0xffff) * (speedup)) |
| |
| #define LPDDR2_MR4_SRR GENMASK(2, 0) |
| |
| static const struct tegra210_emc_sequence *tegra210_emc_sequences[] = { |
| &tegra210_emc_r21021, |
| }; |
| |
| static const struct tegra210_emc_table_register_offsets |
| tegra210_emc_table_register_offsets = { |
| .burst = { |
| EMC_RC, |
| EMC_RFC, |
| EMC_RFCPB, |
| EMC_REFCTRL2, |
| EMC_RFC_SLR, |
| EMC_RAS, |
| EMC_RP, |
| EMC_R2W, |
| EMC_W2R, |
| EMC_R2P, |
| EMC_W2P, |
| EMC_R2R, |
| EMC_TPPD, |
| EMC_CCDMW, |
| EMC_RD_RCD, |
| EMC_WR_RCD, |
| EMC_RRD, |
| EMC_REXT, |
| EMC_WEXT, |
| EMC_WDV_CHK, |
| EMC_WDV, |
| EMC_WSV, |
| EMC_WEV, |
| EMC_WDV_MASK, |
| EMC_WS_DURATION, |
| EMC_WE_DURATION, |
| EMC_QUSE, |
| EMC_QUSE_WIDTH, |
| EMC_IBDLY, |
| EMC_OBDLY, |
| EMC_EINPUT, |
| EMC_MRW6, |
| EMC_EINPUT_DURATION, |
| EMC_PUTERM_EXTRA, |
| EMC_PUTERM_WIDTH, |
| EMC_QRST, |
| EMC_QSAFE, |
| EMC_RDV, |
| EMC_RDV_MASK, |
| EMC_RDV_EARLY, |
| EMC_RDV_EARLY_MASK, |
| EMC_REFRESH, |
| EMC_BURST_REFRESH_NUM, |
| EMC_PRE_REFRESH_REQ_CNT, |
| EMC_PDEX2WR, |
| EMC_PDEX2RD, |
| EMC_PCHG2PDEN, |
| EMC_ACT2PDEN, |
| EMC_AR2PDEN, |
| EMC_RW2PDEN, |
| EMC_CKE2PDEN, |
| EMC_PDEX2CKE, |
| EMC_PDEX2MRR, |
| EMC_TXSR, |
| EMC_TXSRDLL, |
| EMC_TCKE, |
| EMC_TCKESR, |
| EMC_TPD, |
| EMC_TFAW, |
| EMC_TRPAB, |
| EMC_TCLKSTABLE, |
| EMC_TCLKSTOP, |
| EMC_MRW7, |
| EMC_TREFBW, |
| EMC_ODT_WRITE, |
| EMC_FBIO_CFG5, |
| EMC_FBIO_CFG7, |
| EMC_CFG_DIG_DLL, |
| EMC_CFG_DIG_DLL_PERIOD, |
| EMC_PMACRO_IB_RXRT, |
| EMC_CFG_PIPE_1, |
| EMC_CFG_PIPE_2, |
| EMC_PMACRO_QUSE_DDLL_RANK0_4, |
| EMC_PMACRO_QUSE_DDLL_RANK0_5, |
| EMC_PMACRO_QUSE_DDLL_RANK1_4, |
| EMC_PMACRO_QUSE_DDLL_RANK1_5, |
| EMC_MRW8, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_4, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_5, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_0, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_1, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_2, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_3, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_4, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK0_5, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_0, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_1, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_2, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_3, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_4, |
| EMC_PMACRO_OB_DDLL_LONG_DQS_RANK1_5, |
| EMC_PMACRO_DDLL_LONG_CMD_0, |
| EMC_PMACRO_DDLL_LONG_CMD_1, |
| EMC_PMACRO_DDLL_LONG_CMD_2, |
| EMC_PMACRO_DDLL_LONG_CMD_3, |
| EMC_PMACRO_DDLL_LONG_CMD_4, |
| EMC_PMACRO_DDLL_SHORT_CMD_0, |
| EMC_PMACRO_DDLL_SHORT_CMD_1, |
| EMC_PMACRO_DDLL_SHORT_CMD_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE0_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE1_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE2_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE3_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE4_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE5_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE6_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE7_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD0_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD1_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD2_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD3_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE0_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE1_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE2_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE3_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE4_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE5_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE6_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE7_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD0_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD0_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD0_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD0_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD1_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD1_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD1_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD1_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD2_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD2_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD2_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD2_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD3_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD3_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD3_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_CMD3_3, |
| EMC_TXDSRVTTGEN, |
| EMC_FDPD_CTRL_DQ, |
| EMC_FDPD_CTRL_CMD, |
| EMC_FBIO_SPARE, |
| EMC_ZCAL_INTERVAL, |
| EMC_ZCAL_WAIT_CNT, |
| EMC_MRS_WAIT_CNT, |
| EMC_MRS_WAIT_CNT2, |
| EMC_AUTO_CAL_CHANNEL, |
| EMC_DLL_CFG_0, |
| EMC_DLL_CFG_1, |
| EMC_PMACRO_AUTOCAL_CFG_COMMON, |
| EMC_PMACRO_ZCTRL, |
| EMC_CFG, |
| EMC_CFG_PIPE, |
| EMC_DYN_SELF_REF_CONTROL, |
| EMC_QPOP, |
| EMC_DQS_BRLSHFT_0, |
| EMC_DQS_BRLSHFT_1, |
| EMC_CMD_BRLSHFT_2, |
| EMC_CMD_BRLSHFT_3, |
| EMC_PMACRO_PAD_CFG_CTRL, |
| EMC_PMACRO_DATA_PAD_RX_CTRL, |
| EMC_PMACRO_CMD_PAD_RX_CTRL, |
| EMC_PMACRO_DATA_RX_TERM_MODE, |
| EMC_PMACRO_CMD_RX_TERM_MODE, |
| EMC_PMACRO_CMD_PAD_TX_CTRL, |
| EMC_PMACRO_DATA_PAD_TX_CTRL, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, |
| EMC_PMACRO_VTTGEN_CTRL_0, |
| EMC_PMACRO_VTTGEN_CTRL_1, |
| EMC_PMACRO_VTTGEN_CTRL_2, |
| EMC_PMACRO_BRICK_CTRL_RFU1, |
| EMC_PMACRO_CMD_BRICK_CTRL_FDPD, |
| EMC_PMACRO_BRICK_CTRL_RFU2, |
| EMC_PMACRO_DATA_BRICK_CTRL_FDPD, |
| EMC_PMACRO_BG_BIAS_CTRL_0, |
| EMC_CFG_3, |
| EMC_PMACRO_TX_PWRD_0, |
| EMC_PMACRO_TX_PWRD_1, |
| EMC_PMACRO_TX_PWRD_2, |
| EMC_PMACRO_TX_PWRD_3, |
| EMC_PMACRO_TX_PWRD_4, |
| EMC_PMACRO_TX_PWRD_5, |
| EMC_CONFIG_SAMPLE_DELAY, |
| EMC_PMACRO_TX_SEL_CLK_SRC_0, |
| EMC_PMACRO_TX_SEL_CLK_SRC_1, |
| EMC_PMACRO_TX_SEL_CLK_SRC_2, |
| EMC_PMACRO_TX_SEL_CLK_SRC_3, |
| EMC_PMACRO_TX_SEL_CLK_SRC_4, |
| EMC_PMACRO_TX_SEL_CLK_SRC_5, |
| EMC_PMACRO_DDLL_BYPASS, |
| EMC_PMACRO_DDLL_PWRD_0, |
| EMC_PMACRO_DDLL_PWRD_1, |
| EMC_PMACRO_DDLL_PWRD_2, |
| EMC_PMACRO_CMD_CTRL_0, |
| EMC_PMACRO_CMD_CTRL_1, |
| EMC_PMACRO_CMD_CTRL_2, |
| EMC_TR_TIMING_0, |
| EMC_TR_DVFS, |
| EMC_TR_CTRL_1, |
| EMC_TR_RDV, |
| EMC_TR_QPOP, |
| EMC_TR_RDV_MASK, |
| EMC_MRW14, |
| EMC_TR_QSAFE, |
| EMC_TR_QRST, |
| EMC_TRAINING_CTRL, |
| EMC_TRAINING_SETTLE, |
| EMC_TRAINING_VREF_SETTLE, |
| EMC_TRAINING_CA_FINE_CTRL, |
| EMC_TRAINING_CA_CTRL_MISC, |
| EMC_TRAINING_CA_CTRL_MISC1, |
| EMC_TRAINING_CA_VREF_CTRL, |
| EMC_TRAINING_QUSE_CORS_CTRL, |
| EMC_TRAINING_QUSE_FINE_CTRL, |
| EMC_TRAINING_QUSE_CTRL_MISC, |
| EMC_TRAINING_QUSE_VREF_CTRL, |
| EMC_TRAINING_READ_FINE_CTRL, |
| EMC_TRAINING_READ_CTRL_MISC, |
| EMC_TRAINING_READ_VREF_CTRL, |
| EMC_TRAINING_WRITE_FINE_CTRL, |
| EMC_TRAINING_WRITE_CTRL_MISC, |
| EMC_TRAINING_WRITE_VREF_CTRL, |
| EMC_TRAINING_MPC, |
| EMC_MRW15, |
| }, |
| .trim = { |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK0_0, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK0_1, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK0_2, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK0_3, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK1_0, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK1_1, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK1_2, |
| EMC_PMACRO_IB_DDLL_LONG_DQS_RANK1_3, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE0_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE0_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE0_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE1_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE1_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE1_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE2_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE2_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE2_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE3_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE3_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE3_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE4_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE4_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE4_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE5_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE5_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE5_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE6_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE6_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE6_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE7_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE7_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK0_BYTE7_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE0_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE0_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE0_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE1_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE1_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE1_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE2_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE2_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE2_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE3_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE3_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE3_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE4_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE4_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE4_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE5_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE5_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE5_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE6_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE6_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE6_2, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE7_0, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE7_1, |
| EMC_PMACRO_IB_DDLL_SHORT_DQ_RANK1_BYTE7_2, |
| EMC_PMACRO_IB_VREF_DQS_0, |
| EMC_PMACRO_IB_VREF_DQS_1, |
| EMC_PMACRO_IB_VREF_DQ_0, |
| EMC_PMACRO_IB_VREF_DQ_1, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_4, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_5, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2, |
| EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE0_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE0_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE0_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE1_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE1_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE1_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE2_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE2_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE2_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE3_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE3_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE3_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE4_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE4_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE4_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE5_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE5_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE5_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE6_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE6_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE6_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE7_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE7_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_BYTE7_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD0_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD0_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD0_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD1_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD1_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD1_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD2_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD2_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD2_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD3_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD3_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK0_CMD3_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE0_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE0_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE0_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE1_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE1_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE1_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE2_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE2_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE2_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE3_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE3_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE3_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE4_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE4_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE4_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE5_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE5_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE5_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE6_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE6_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE6_2, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE7_0, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE7_1, |
| EMC_PMACRO_OB_DDLL_SHORT_DQ_RANK1_BYTE7_2, |
| EMC_PMACRO_QUSE_DDLL_RANK0_0, |
| EMC_PMACRO_QUSE_DDLL_RANK0_1, |
| EMC_PMACRO_QUSE_DDLL_RANK0_2, |
| EMC_PMACRO_QUSE_DDLL_RANK0_3, |
| EMC_PMACRO_QUSE_DDLL_RANK1_0, |
| EMC_PMACRO_QUSE_DDLL_RANK1_1, |
| EMC_PMACRO_QUSE_DDLL_RANK1_2, |
| EMC_PMACRO_QUSE_DDLL_RANK1_3 |
| }, |
| .burst_mc = { |
| MC_EMEM_ARB_CFG, |
| MC_EMEM_ARB_OUTSTANDING_REQ, |
| MC_EMEM_ARB_REFPB_HP_CTRL, |
| MC_EMEM_ARB_REFPB_BANK_CTRL, |
| MC_EMEM_ARB_TIMING_RCD, |
| MC_EMEM_ARB_TIMING_RP, |
| MC_EMEM_ARB_TIMING_RC, |
| MC_EMEM_ARB_TIMING_RAS, |
| MC_EMEM_ARB_TIMING_FAW, |
| MC_EMEM_ARB_TIMING_RRD, |
| MC_EMEM_ARB_TIMING_RAP2PRE, |
| MC_EMEM_ARB_TIMING_WAP2PRE, |
| MC_EMEM_ARB_TIMING_R2R, |
| MC_EMEM_ARB_TIMING_W2W, |
| MC_EMEM_ARB_TIMING_R2W, |
| MC_EMEM_ARB_TIMING_CCDMW, |
| MC_EMEM_ARB_TIMING_W2R, |
| MC_EMEM_ARB_TIMING_RFCPB, |
| MC_EMEM_ARB_DA_TURNS, |
| MC_EMEM_ARB_DA_COVERS, |
| MC_EMEM_ARB_MISC0, |
| MC_EMEM_ARB_MISC1, |
| MC_EMEM_ARB_MISC2, |
| MC_EMEM_ARB_RING1_THROTTLE, |
| MC_EMEM_ARB_DHYST_CTRL, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_0, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_1, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_2, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_3, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_4, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_5, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_6, |
| MC_EMEM_ARB_DHYST_TIMEOUT_UTIL_7, |
| }, |
| .la_scale = { |
| MC_MLL_MPCORER_PTSA_RATE, |
| MC_FTOP_PTSA_RATE, |
| MC_PTSA_GRANT_DECREMENT, |
| MC_LATENCY_ALLOWANCE_XUSB_0, |
| MC_LATENCY_ALLOWANCE_XUSB_1, |
| MC_LATENCY_ALLOWANCE_TSEC_0, |
| MC_LATENCY_ALLOWANCE_SDMMCA_0, |
| MC_LATENCY_ALLOWANCE_SDMMCAA_0, |
| MC_LATENCY_ALLOWANCE_SDMMC_0, |
| MC_LATENCY_ALLOWANCE_SDMMCAB_0, |
| MC_LATENCY_ALLOWANCE_PPCS_0, |
| MC_LATENCY_ALLOWANCE_PPCS_1, |
| MC_LATENCY_ALLOWANCE_MPCORE_0, |
| MC_LATENCY_ALLOWANCE_HC_0, |
| MC_LATENCY_ALLOWANCE_HC_1, |
| MC_LATENCY_ALLOWANCE_AVPC_0, |
| MC_LATENCY_ALLOWANCE_GPU_0, |
| MC_LATENCY_ALLOWANCE_GPU2_0, |
| MC_LATENCY_ALLOWANCE_NVENC_0, |
| MC_LATENCY_ALLOWANCE_NVDEC_0, |
| MC_LATENCY_ALLOWANCE_VIC_0, |
| MC_LATENCY_ALLOWANCE_VI2_0, |
| MC_LATENCY_ALLOWANCE_ISP2_0, |
| MC_LATENCY_ALLOWANCE_ISP2_1, |
| }, |
| .burst_per_channel = { |
| { .bank = 0, .offset = EMC_MRW10, }, |
| { .bank = 1, .offset = EMC_MRW10, }, |
| { .bank = 0, .offset = EMC_MRW11, }, |
| { .bank = 1, .offset = EMC_MRW11, }, |
| { .bank = 0, .offset = EMC_MRW12, }, |
| { .bank = 1, .offset = EMC_MRW12, }, |
| { .bank = 0, .offset = EMC_MRW13, }, |
| { .bank = 1, .offset = EMC_MRW13, }, |
| }, |
| .trim_per_channel = { |
| { .bank = 0, .offset = EMC_CMD_BRLSHFT_0, }, |
| { .bank = 1, .offset = EMC_CMD_BRLSHFT_1, }, |
| { .bank = 0, .offset = EMC_DATA_BRLSHFT_0, }, |
| { .bank = 1, .offset = EMC_DATA_BRLSHFT_0, }, |
| { .bank = 0, .offset = EMC_DATA_BRLSHFT_1, }, |
| { .bank = 1, .offset = EMC_DATA_BRLSHFT_1, }, |
| { .bank = 0, .offset = EMC_QUSE_BRLSHFT_0, }, |
| { .bank = 1, .offset = EMC_QUSE_BRLSHFT_1, }, |
| { .bank = 0, .offset = EMC_QUSE_BRLSHFT_2, }, |
| { .bank = 1, .offset = EMC_QUSE_BRLSHFT_3, }, |
| }, |
| .vref_per_channel = { |
| { |
| .bank = 0, |
| .offset = EMC_TRAINING_OPT_DQS_IB_VREF_RANK0, |
| }, { |
| .bank = 1, |
| .offset = EMC_TRAINING_OPT_DQS_IB_VREF_RANK0, |
| }, { |
| .bank = 0, |
| .offset = EMC_TRAINING_OPT_DQS_IB_VREF_RANK1, |
| }, { |
| .bank = 1, |
| .offset = EMC_TRAINING_OPT_DQS_IB_VREF_RANK1, |
| }, |
| }, |
| }; |
| |
| static void tegra210_emc_train(struct timer_list *timer) |
| { |
| struct tegra210_emc *emc = from_timer(emc, timer, training); |
| unsigned long flags; |
| |
| if (!emc->last) |
| return; |
| |
| spin_lock_irqsave(&emc->lock, flags); |
| |
| if (emc->sequence->periodic_compensation) |
| emc->sequence->periodic_compensation(emc); |
| |
| spin_unlock_irqrestore(&emc->lock, flags); |
| |
| mod_timer(&emc->training, |
| jiffies + msecs_to_jiffies(emc->training_interval)); |
| } |
| |
| static void tegra210_emc_training_start(struct tegra210_emc *emc) |
| { |
| mod_timer(&emc->training, |
| jiffies + msecs_to_jiffies(emc->training_interval)); |
| } |
| |
| static void tegra210_emc_training_stop(struct tegra210_emc *emc) |
| { |
| del_timer(&emc->training); |
| } |
| |
| static unsigned int tegra210_emc_get_temperature(struct tegra210_emc *emc) |
| { |
| unsigned long flags; |
| u32 value, max = 0; |
| unsigned int i; |
| |
| spin_lock_irqsave(&emc->lock, flags); |
| |
| for (i = 0; i < emc->num_devices; i++) { |
| value = tegra210_emc_mrr_read(emc, i, 4); |
| |
| if (value & BIT(7)) |
| dev_dbg(emc->dev, |
| "sensor reading changed for device %u: %08x\n", |
| i, value); |
| |
| value = FIELD_GET(LPDDR2_MR4_SRR, value); |
| if (value > max) |
| max = value; |
| } |
| |
| spin_unlock_irqrestore(&emc->lock, flags); |
| |
| return max; |
| } |
| |
| static void tegra210_emc_poll_refresh(struct timer_list *timer) |
| { |
| struct tegra210_emc *emc = from_timer(emc, timer, refresh_timer); |
| unsigned int temperature; |
| |
| if (!emc->debugfs.temperature) |
| temperature = tegra210_emc_get_temperature(emc); |
| else |
| temperature = emc->debugfs.temperature; |
| |
| if (temperature == emc->temperature) |
| goto reset; |
| |
| switch (temperature) { |
| case 0 ... 3: |
| /* temperature is fine, using regular refresh */ |
| dev_dbg(emc->dev, "switching to nominal refresh...\n"); |
| tegra210_emc_set_refresh(emc, TEGRA210_EMC_REFRESH_NOMINAL); |
| break; |
| |
| case 4: |
| dev_dbg(emc->dev, "switching to 2x refresh...\n"); |
| tegra210_emc_set_refresh(emc, TEGRA210_EMC_REFRESH_2X); |
| break; |
| |
| case 5: |
| dev_dbg(emc->dev, "switching to 4x refresh...\n"); |
| tegra210_emc_set_refresh(emc, TEGRA210_EMC_REFRESH_4X); |
| break; |
| |
| case 6 ... 7: |
| dev_dbg(emc->dev, "switching to throttle refresh...\n"); |
| tegra210_emc_set_refresh(emc, TEGRA210_EMC_REFRESH_THROTTLE); |
| break; |
| |
| default: |
| WARN(1, "invalid DRAM temperature state %u\n", temperature); |
| return; |
| } |
| |
| emc->temperature = temperature; |
| |
| reset: |
| if (atomic_read(&emc->refresh_poll) > 0) { |
| unsigned int interval = emc->refresh_poll_interval; |
| unsigned int timeout = msecs_to_jiffies(interval); |
| |
| mod_timer(&emc->refresh_timer, jiffies + timeout); |
| } |
| } |
| |
| static void tegra210_emc_poll_refresh_stop(struct tegra210_emc *emc) |
| { |
| atomic_set(&emc->refresh_poll, 0); |
| del_timer_sync(&emc->refresh_timer); |
| } |
| |
| static void tegra210_emc_poll_refresh_start(struct tegra210_emc *emc) |
| { |
| atomic_set(&emc->refresh_poll, 1); |
| |
| mod_timer(&emc->refresh_timer, |
| jiffies + msecs_to_jiffies(emc->refresh_poll_interval)); |
| } |
| |
| static int tegra210_emc_cd_max_state(struct thermal_cooling_device *cd, |
| unsigned long *state) |
| { |
| *state = 1; |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_cd_get_state(struct thermal_cooling_device *cd, |
| unsigned long *state) |
| { |
| struct tegra210_emc *emc = cd->devdata; |
| |
| *state = atomic_read(&emc->refresh_poll); |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_cd_set_state(struct thermal_cooling_device *cd, |
| unsigned long state) |
| { |
| struct tegra210_emc *emc = cd->devdata; |
| |
| if (state == atomic_read(&emc->refresh_poll)) |
| return 0; |
| |
| if (state) |
| tegra210_emc_poll_refresh_start(emc); |
| else |
| tegra210_emc_poll_refresh_stop(emc); |
| |
| return 0; |
| } |
| |
| static const struct thermal_cooling_device_ops tegra210_emc_cd_ops = { |
| .get_max_state = tegra210_emc_cd_max_state, |
| .get_cur_state = tegra210_emc_cd_get_state, |
| .set_cur_state = tegra210_emc_cd_set_state, |
| }; |
| |
| static void tegra210_emc_set_clock(struct tegra210_emc *emc, u32 clksrc) |
| { |
| emc->sequence->set_clock(emc, clksrc); |
| |
| if (emc->next->periodic_training) |
| tegra210_emc_training_start(emc); |
| else |
| tegra210_emc_training_stop(emc); |
| } |
| |
| static void tegra210_change_dll_src(struct tegra210_emc *emc, |
| u32 clksrc) |
| { |
| u32 dll_setting = emc->next->dll_clk_src; |
| u32 emc_clk_src; |
| u32 emc_clk_div; |
| |
| emc_clk_src = (clksrc & EMC_CLK_EMC_2X_CLK_SRC_MASK) >> |
| EMC_CLK_EMC_2X_CLK_SRC_SHIFT; |
| emc_clk_div = (clksrc & EMC_CLK_EMC_2X_CLK_DIVISOR_MASK) >> |
| EMC_CLK_EMC_2X_CLK_DIVISOR_SHIFT; |
| |
| dll_setting &= ~(DLL_CLK_EMC_DLL_CLK_SRC_MASK | |
| DLL_CLK_EMC_DLL_CLK_DIVISOR_MASK); |
| dll_setting |= emc_clk_src << DLL_CLK_EMC_DLL_CLK_SRC_SHIFT; |
| dll_setting |= emc_clk_div << DLL_CLK_EMC_DLL_CLK_DIVISOR_SHIFT; |
| |
| dll_setting &= ~DLL_CLK_EMC_DLL_DDLL_CLK_SEL_MASK; |
| if (emc_clk_src == EMC_CLK_SOURCE_PLLMB_LJ) |
| dll_setting |= (PLLM_VCOB << |
| DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT); |
| else if (emc_clk_src == EMC_CLK_SOURCE_PLLM_LJ) |
| dll_setting |= (PLLM_VCOA << |
| DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT); |
| else |
| dll_setting |= (EMC_DLL_SWITCH_OUT << |
| DLL_CLK_EMC_DLL_DDLL_CLK_SEL_SHIFT); |
| |
| tegra210_clk_emc_dll_update_setting(dll_setting); |
| |
| if (emc->next->clk_out_enb_x_0_clk_enb_emc_dll) |
| tegra210_clk_emc_dll_enable(true); |
| else |
| tegra210_clk_emc_dll_enable(false); |
| } |
| |
| int tegra210_emc_set_refresh(struct tegra210_emc *emc, |
| enum tegra210_emc_refresh refresh) |
| { |
| struct tegra210_emc_timing *timings; |
| unsigned long flags; |
| |
| if ((emc->dram_type != DRAM_TYPE_LPDDR2 && |
| emc->dram_type != DRAM_TYPE_LPDDR4) || |
| !emc->last) |
| return -ENODEV; |
| |
| if (refresh > TEGRA210_EMC_REFRESH_THROTTLE) |
| return -EINVAL; |
| |
| if (refresh == emc->refresh) |
| return 0; |
| |
| spin_lock_irqsave(&emc->lock, flags); |
| |
| if (refresh == TEGRA210_EMC_REFRESH_THROTTLE && emc->derated) |
| timings = emc->derated; |
| else |
| timings = emc->nominal; |
| |
| if (timings != emc->timings) { |
| unsigned int index = emc->last - emc->timings; |
| u32 clksrc; |
| |
| clksrc = emc->provider.configs[index].value | |
| EMC_CLK_FORCE_CC_TRIGGER; |
| |
| emc->next = &timings[index]; |
| emc->timings = timings; |
| |
| tegra210_emc_set_clock(emc, clksrc); |
| } else { |
| tegra210_emc_adjust_timing(emc, emc->last); |
| tegra210_emc_timing_update(emc); |
| |
| if (refresh != TEGRA210_EMC_REFRESH_NOMINAL) |
| emc_writel(emc, EMC_REF_REF_CMD, EMC_REF); |
| } |
| |
| spin_unlock_irqrestore(&emc->lock, flags); |
| |
| return 0; |
| } |
| |
| u32 tegra210_emc_mrr_read(struct tegra210_emc *emc, unsigned int chip, |
| unsigned int address) |
| { |
| u32 value, ret = 0; |
| unsigned int i; |
| |
| value = (chip & EMC_MRR_DEV_SEL_MASK) << EMC_MRR_DEV_SEL_SHIFT | |
| (address & EMC_MRR_MA_MASK) << EMC_MRR_MA_SHIFT; |
| emc_writel(emc, value, EMC_MRR); |
| |
| for (i = 0; i < emc->num_channels; i++) |
| WARN(tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS, |
| EMC_EMC_STATUS_MRR_DIVLD, 1), |
| "Timed out waiting for MRR %u (ch=%u)\n", address, i); |
| |
| for (i = 0; i < emc->num_channels; i++) { |
| value = emc_channel_readl(emc, i, EMC_MRR); |
| value &= EMC_MRR_DATA_MASK; |
| |
| ret = (ret << 16) | value; |
| } |
| |
| return ret; |
| } |
| |
| void tegra210_emc_do_clock_change(struct tegra210_emc *emc, u32 clksrc) |
| { |
| int err; |
| |
| mc_readl(emc->mc, MC_EMEM_ADR_CFG); |
| emc_readl(emc, EMC_INTSTATUS); |
| |
| tegra210_clk_emc_update_setting(clksrc); |
| |
| err = tegra210_emc_wait_for_update(emc, 0, EMC_INTSTATUS, |
| EMC_INTSTATUS_CLKCHANGE_COMPLETE, |
| true); |
| if (err) |
| dev_warn(emc->dev, "clock change completion error: %d\n", err); |
| } |
| |
| struct tegra210_emc_timing *tegra210_emc_find_timing(struct tegra210_emc *emc, |
| unsigned long rate) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < emc->num_timings; i++) |
| if (emc->timings[i].rate * 1000UL == rate) |
| return &emc->timings[i]; |
| |
| return NULL; |
| } |
| |
| int tegra210_emc_wait_for_update(struct tegra210_emc *emc, unsigned int channel, |
| unsigned int offset, u32 bit_mask, bool state) |
| { |
| unsigned int i; |
| u32 value; |
| |
| for (i = 0; i < EMC_STATUS_UPDATE_TIMEOUT; i++) { |
| value = emc_channel_readl(emc, channel, offset); |
| if (!!(value & bit_mask) == state) |
| return 0; |
| |
| udelay(1); |
| } |
| |
| return -ETIMEDOUT; |
| } |
| |
| void tegra210_emc_set_shadow_bypass(struct tegra210_emc *emc, int set) |
| { |
| u32 emc_dbg = emc_readl(emc, EMC_DBG); |
| |
| if (set) |
| emc_writel(emc, emc_dbg | EMC_DBG_WRITE_MUX_ACTIVE, EMC_DBG); |
| else |
| emc_writel(emc, emc_dbg & ~EMC_DBG_WRITE_MUX_ACTIVE, EMC_DBG); |
| } |
| |
| u32 tegra210_emc_get_dll_state(struct tegra210_emc_timing *next) |
| { |
| if (next->emc_emrs & 0x1) |
| return 0; |
| |
| return 1; |
| } |
| |
| void tegra210_emc_timing_update(struct tegra210_emc *emc) |
| { |
| unsigned int i; |
| int err = 0; |
| |
| emc_writel(emc, 0x1, EMC_TIMING_CONTROL); |
| |
| for (i = 0; i < emc->num_channels; i++) { |
| err |= tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS, |
| EMC_EMC_STATUS_TIMING_UPDATE_STALLED, |
| false); |
| } |
| |
| if (err) |
| dev_warn(emc->dev, "timing update error: %d\n", err); |
| } |
| |
| unsigned long tegra210_emc_actual_osc_clocks(u32 in) |
| { |
| if (in < 0x40) |
| return in * 16; |
| else if (in < 0x80) |
| return 2048; |
| else if (in < 0xc0) |
| return 4096; |
| else |
| return 8192; |
| } |
| |
| void tegra210_emc_start_periodic_compensation(struct tegra210_emc *emc) |
| { |
| u32 mpc_req = 0x4b; |
| |
| emc_writel(emc, mpc_req, EMC_MPC); |
| mpc_req = emc_readl(emc, EMC_MPC); |
| } |
| |
| u32 tegra210_emc_compensate(struct tegra210_emc_timing *next, u32 offset) |
| { |
| u32 temp = 0, rate = next->rate / 1000; |
| s32 delta[4], delta_taps[4]; |
| s32 new[] = { |
| TRIM_REG(0, 0, 0, 0), |
| TRIM_REG(0, 0, 0, 1), |
| TRIM_REG(0, 0, 1, 2), |
| TRIM_REG(0, 0, 1, 3), |
| |
| TRIM_REG(1, 0, 2, 4), |
| TRIM_REG(1, 0, 2, 5), |
| TRIM_REG(1, 0, 3, 6), |
| TRIM_REG(1, 0, 3, 7), |
| |
| TRIM_REG(0, 1, 0, 0), |
| TRIM_REG(0, 1, 0, 1), |
| TRIM_REG(0, 1, 1, 2), |
| TRIM_REG(0, 1, 1, 3), |
| |
| TRIM_REG(1, 1, 2, 4), |
| TRIM_REG(1, 1, 2, 5), |
| TRIM_REG(1, 1, 3, 6), |
| TRIM_REG(1, 1, 3, 7) |
| }; |
| unsigned i; |
| |
| switch (offset) { |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3: |
| case EMC_DATA_BRLSHFT_0: |
| delta[0] = 128 * (next->current_dram_clktree[C0D0U0] - |
| next->trained_dram_clktree[C0D0U0]); |
| delta[1] = 128 * (next->current_dram_clktree[C0D0U1] - |
| next->trained_dram_clktree[C0D0U1]); |
| delta[2] = 128 * (next->current_dram_clktree[C1D0U0] - |
| next->trained_dram_clktree[C1D0U0]); |
| delta[3] = 128 * (next->current_dram_clktree[C1D0U1] - |
| next->trained_dram_clktree[C1D0U1]); |
| |
| delta_taps[0] = (delta[0] * (s32)rate) / 1000000; |
| delta_taps[1] = (delta[1] * (s32)rate) / 1000000; |
| delta_taps[2] = (delta[2] * (s32)rate) / 1000000; |
| delta_taps[3] = (delta[3] * (s32)rate) / 1000000; |
| |
| for (i = 0; i < 4; i++) { |
| if ((delta_taps[i] > next->tree_margin) || |
| (delta_taps[i] < (-1 * next->tree_margin))) { |
| new[i * 2] = new[i * 2] + delta_taps[i]; |
| new[i * 2 + 1] = new[i * 2 + 1] + |
| delta_taps[i]; |
| } |
| } |
| |
| if (offset == EMC_DATA_BRLSHFT_0) { |
| for (i = 0; i < 8; i++) |
| new[i] = new[i] / 64; |
| } else { |
| for (i = 0; i < 8; i++) |
| new[i] = new[i] % 64; |
| } |
| |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2: |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3: |
| case EMC_DATA_BRLSHFT_1: |
| delta[0] = 128 * (next->current_dram_clktree[C0D1U0] - |
| next->trained_dram_clktree[C0D1U0]); |
| delta[1] = 128 * (next->current_dram_clktree[C0D1U1] - |
| next->trained_dram_clktree[C0D1U1]); |
| delta[2] = 128 * (next->current_dram_clktree[C1D1U0] - |
| next->trained_dram_clktree[C1D1U0]); |
| delta[3] = 128 * (next->current_dram_clktree[C1D1U1] - |
| next->trained_dram_clktree[C1D1U1]); |
| |
| delta_taps[0] = (delta[0] * (s32)rate) / 1000000; |
| delta_taps[1] = (delta[1] * (s32)rate) / 1000000; |
| delta_taps[2] = (delta[2] * (s32)rate) / 1000000; |
| delta_taps[3] = (delta[3] * (s32)rate) / 1000000; |
| |
| for (i = 0; i < 4; i++) { |
| if ((delta_taps[i] > next->tree_margin) || |
| (delta_taps[i] < (-1 * next->tree_margin))) { |
| new[8 + i * 2] = new[8 + i * 2] + |
| delta_taps[i]; |
| new[8 + i * 2 + 1] = new[8 + i * 2 + 1] + |
| delta_taps[i]; |
| } |
| } |
| |
| if (offset == EMC_DATA_BRLSHFT_1) { |
| for (i = 0; i < 8; i++) |
| new[i + 8] = new[i + 8] / 64; |
| } else { |
| for (i = 0; i < 8; i++) |
| new[i + 8] = new[i + 8] % 64; |
| } |
| |
| break; |
| } |
| |
| switch (offset) { |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_0: |
| temp = CALC_TEMP(0, 0, 0, 1, 0); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_1: |
| temp = CALC_TEMP(0, 1, 2, 3, 2); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_2: |
| temp = CALC_TEMP(0, 2, 4, 5, 4); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK0_3: |
| temp = CALC_TEMP(0, 3, 6, 7, 6); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_0: |
| temp = CALC_TEMP(1, 0, 0, 1, 8); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_1: |
| temp = CALC_TEMP(1, 1, 2, 3, 10); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_2: |
| temp = CALC_TEMP(1, 2, 4, 5, 12); |
| break; |
| |
| case EMC_PMACRO_OB_DDLL_LONG_DQ_RANK1_3: |
| temp = CALC_TEMP(1, 3, 6, 7, 14); |
| break; |
| |
| case EMC_DATA_BRLSHFT_0: |
| temp = ((new[0] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE0_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE0_DATA_BRLSHFT_MASK) | |
| ((new[1] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE1_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE1_DATA_BRLSHFT_MASK) | |
| ((new[2] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE2_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE2_DATA_BRLSHFT_MASK) | |
| ((new[3] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE3_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE3_DATA_BRLSHFT_MASK) | |
| ((new[4] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE4_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE4_DATA_BRLSHFT_MASK) | |
| ((new[5] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE5_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE5_DATA_BRLSHFT_MASK) | |
| ((new[6] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE6_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE6_DATA_BRLSHFT_MASK) | |
| ((new[7] << |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE7_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_0_RANK0_BYTE7_DATA_BRLSHFT_MASK); |
| break; |
| |
| case EMC_DATA_BRLSHFT_1: |
| temp = ((new[8] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE0_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE0_DATA_BRLSHFT_MASK) | |
| ((new[9] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE1_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE1_DATA_BRLSHFT_MASK) | |
| ((new[10] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE2_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE2_DATA_BRLSHFT_MASK) | |
| ((new[11] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE3_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE3_DATA_BRLSHFT_MASK) | |
| ((new[12] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE4_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE4_DATA_BRLSHFT_MASK) | |
| ((new[13] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE5_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE5_DATA_BRLSHFT_MASK) | |
| ((new[14] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE6_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE6_DATA_BRLSHFT_MASK) | |
| ((new[15] << |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE7_DATA_BRLSHFT_SHIFT) & |
| EMC_DATA_BRLSHFT_1_RANK1_BYTE7_DATA_BRLSHFT_MASK); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return temp; |
| } |
| |
| u32 tegra210_emc_dll_prelock(struct tegra210_emc *emc, u32 clksrc) |
| { |
| unsigned int i; |
| u32 value; |
| |
| value = emc_readl(emc, EMC_CFG_DIG_DLL); |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_LOCK_LIMIT_MASK; |
| value |= (3 << EMC_CFG_DIG_DLL_CFG_DLL_LOCK_LIMIT_SHIFT); |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_EN; |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_MODE_MASK; |
| value |= (3 << EMC_CFG_DIG_DLL_CFG_DLL_MODE_SHIFT); |
| value |= EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_TRAFFIC; |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_RW_UNTIL_LOCK; |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_STALL_ALL_UNTIL_LOCK; |
| emc_writel(emc, value, EMC_CFG_DIG_DLL); |
| emc_writel(emc, 1, EMC_TIMING_CONTROL); |
| |
| for (i = 0; i < emc->num_channels; i++) |
| tegra210_emc_wait_for_update(emc, i, EMC_EMC_STATUS, |
| EMC_EMC_STATUS_TIMING_UPDATE_STALLED, |
| 0); |
| |
| for (i = 0; i < emc->num_channels; i++) { |
| while (true) { |
| value = emc_channel_readl(emc, i, EMC_CFG_DIG_DLL); |
| if ((value & EMC_CFG_DIG_DLL_CFG_DLL_EN) == 0) |
| break; |
| } |
| } |
| |
| value = emc->next->burst_regs[EMC_DLL_CFG_0_INDEX]; |
| emc_writel(emc, value, EMC_DLL_CFG_0); |
| |
| value = emc_readl(emc, EMC_DLL_CFG_1); |
| value &= EMC_DLL_CFG_1_DDLLCAL_CTRL_START_TRIM_MASK; |
| |
| if (emc->next->rate >= 400000 && emc->next->rate < 600000) |
| value |= 150; |
| else if (emc->next->rate >= 600000 && emc->next->rate < 800000) |
| value |= 100; |
| else if (emc->next->rate >= 800000 && emc->next->rate < 1000000) |
| value |= 70; |
| else if (emc->next->rate >= 1000000 && emc->next->rate < 1200000) |
| value |= 30; |
| else |
| value |= 20; |
| |
| emc_writel(emc, value, EMC_DLL_CFG_1); |
| |
| tegra210_change_dll_src(emc, clksrc); |
| |
| value = emc_readl(emc, EMC_CFG_DIG_DLL); |
| value |= EMC_CFG_DIG_DLL_CFG_DLL_EN; |
| emc_writel(emc, value, EMC_CFG_DIG_DLL); |
| |
| tegra210_emc_timing_update(emc); |
| |
| for (i = 0; i < emc->num_channels; i++) { |
| while (true) { |
| value = emc_channel_readl(emc, 0, EMC_CFG_DIG_DLL); |
| if (value & EMC_CFG_DIG_DLL_CFG_DLL_EN) |
| break; |
| } |
| } |
| |
| while (true) { |
| value = emc_readl(emc, EMC_DIG_DLL_STATUS); |
| |
| if ((value & EMC_DIG_DLL_STATUS_DLL_PRIV_UPDATED) == 0) |
| continue; |
| |
| if ((value & EMC_DIG_DLL_STATUS_DLL_LOCK) == 0) |
| continue; |
| |
| break; |
| } |
| |
| value = emc_readl(emc, EMC_DIG_DLL_STATUS); |
| |
| return value & EMC_DIG_DLL_STATUS_DLL_OUT_MASK; |
| } |
| |
| u32 tegra210_emc_dvfs_power_ramp_up(struct tegra210_emc *emc, u32 clk, |
| bool flip_backward) |
| { |
| u32 cmd_pad, dq_pad, rfu1, cfg5, common_tx, ramp_up_wait = 0; |
| const struct tegra210_emc_timing *timing; |
| |
| if (flip_backward) |
| timing = emc->last; |
| else |
| timing = emc->next; |
| |
| cmd_pad = timing->burst_regs[EMC_PMACRO_CMD_PAD_TX_CTRL_INDEX]; |
| dq_pad = timing->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX]; |
| rfu1 = timing->burst_regs[EMC_PMACRO_BRICK_CTRL_RFU1_INDEX]; |
| cfg5 = timing->burst_regs[EMC_FBIO_CFG5_INDEX]; |
| common_tx = timing->burst_regs[EMC_PMACRO_COMMON_PAD_TX_CTRL_INDEX]; |
| |
| cmd_pad |= EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_DRVFORCEON; |
| |
| if (clk < 1000000 / DVFS_FGCG_MID_SPEED_THRESHOLD) { |
| ccfifo_writel(emc, common_tx & 0xa, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, common_tx & 0xf, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, |
| (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| } else { |
| ccfifo_writel(emc, common_tx | 0x8, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, 0); |
| } |
| |
| if (clk < 1000000 / DVFS_FGCG_HIGH_SPEED_THRESHOLD) { |
| if (clk < 1000000 / IOBRICK_DCC_THRESHOLD) { |
| cmd_pad |= |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSP_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSN_TX_E_DCC; |
| cmd_pad &= |
| ~(EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_CMD_TX_E_DCC); |
| ccfifo_writel(emc, cmd_pad, |
| EMC_PMACRO_CMD_PAD_TX_CTRL, |
| (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| |
| dq_pad |= |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSP_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSN_TX_E_DCC; |
| dq_pad &= |
| ~(EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_CMD_TX_E_DCC); |
| ccfifo_writel(emc, dq_pad, |
| EMC_PMACRO_DATA_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, rfu1 & 0xfe40fe40, |
| EMC_PMACRO_BRICK_CTRL_RFU1, 0); |
| } else { |
| ccfifo_writel(emc, rfu1 & 0xfe40fe40, |
| EMC_PMACRO_BRICK_CTRL_RFU1, |
| (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| } |
| |
| ccfifo_writel(emc, rfu1 & 0xfeedfeed, |
| EMC_PMACRO_BRICK_CTRL_RFU1, (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| |
| if (clk < 1000000 / IOBRICK_DCC_THRESHOLD) { |
| cmd_pad |= |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSP_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSN_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_CMD_TX_E_DCC; |
| ccfifo_writel(emc, cmd_pad, |
| EMC_PMACRO_CMD_PAD_TX_CTRL, |
| (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| |
| dq_pad |= |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSP_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSN_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_CMD_TX_E_DCC; |
| ccfifo_writel(emc, dq_pad, |
| EMC_PMACRO_DATA_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, rfu1, |
| EMC_PMACRO_BRICK_CTRL_RFU1, 0); |
| } else { |
| ccfifo_writel(emc, rfu1, |
| EMC_PMACRO_BRICK_CTRL_RFU1, |
| (100000 / clk) + 1); |
| ramp_up_wait += 100000; |
| } |
| |
| ccfifo_writel(emc, cfg5 & ~EMC_FBIO_CFG5_CMD_TX_DIS, |
| EMC_FBIO_CFG5, (100000 / clk) + 10); |
| ramp_up_wait += 100000 + (10 * clk); |
| } else if (clk < 1000000 / DVFS_FGCG_MID_SPEED_THRESHOLD) { |
| ccfifo_writel(emc, rfu1 | 0x06000600, |
| EMC_PMACRO_BRICK_CTRL_RFU1, (100000 / clk) + 1); |
| ccfifo_writel(emc, cfg5 & ~EMC_FBIO_CFG5_CMD_TX_DIS, |
| EMC_FBIO_CFG5, (100000 / clk) + 10); |
| ramp_up_wait += 100000 + 10 * clk; |
| } else { |
| ccfifo_writel(emc, rfu1 | 0x00000600, |
| EMC_PMACRO_BRICK_CTRL_RFU1, 0); |
| ccfifo_writel(emc, cfg5 & ~EMC_FBIO_CFG5_CMD_TX_DIS, |
| EMC_FBIO_CFG5, 12); |
| ramp_up_wait += 12 * clk; |
| } |
| |
| cmd_pad &= ~EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_DRVFORCEON; |
| ccfifo_writel(emc, cmd_pad, EMC_PMACRO_CMD_PAD_TX_CTRL, 5); |
| |
| return ramp_up_wait; |
| } |
| |
| u32 tegra210_emc_dvfs_power_ramp_down(struct tegra210_emc *emc, u32 clk, |
| bool flip_backward) |
| { |
| u32 ramp_down_wait = 0, cmd_pad, dq_pad, rfu1, cfg5, common_tx; |
| const struct tegra210_emc_timing *entry; |
| u32 seq_wait; |
| |
| if (flip_backward) |
| entry = emc->next; |
| else |
| entry = emc->last; |
| |
| cmd_pad = entry->burst_regs[EMC_PMACRO_CMD_PAD_TX_CTRL_INDEX]; |
| dq_pad = entry->burst_regs[EMC_PMACRO_DATA_PAD_TX_CTRL_INDEX]; |
| rfu1 = entry->burst_regs[EMC_PMACRO_BRICK_CTRL_RFU1_INDEX]; |
| cfg5 = entry->burst_regs[EMC_FBIO_CFG5_INDEX]; |
| common_tx = entry->burst_regs[EMC_PMACRO_COMMON_PAD_TX_CTRL_INDEX]; |
| |
| cmd_pad |= EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_DRVFORCEON; |
| |
| ccfifo_writel(emc, cmd_pad, EMC_PMACRO_CMD_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, cfg5 | EMC_FBIO_CFG5_CMD_TX_DIS, |
| EMC_FBIO_CFG5, 12); |
| ramp_down_wait = 12 * clk; |
| |
| seq_wait = (100000 / clk) + 1; |
| |
| if (clk < (1000000 / DVFS_FGCG_HIGH_SPEED_THRESHOLD)) { |
| if (clk < (1000000 / IOBRICK_DCC_THRESHOLD)) { |
| cmd_pad &= |
| ~(EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_CMD_TX_E_DCC); |
| cmd_pad |= |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSP_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSN_TX_E_DCC; |
| ccfifo_writel(emc, cmd_pad, |
| EMC_PMACRO_CMD_PAD_TX_CTRL, seq_wait); |
| ramp_down_wait += 100000; |
| |
| dq_pad &= |
| ~(EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_CMD_TX_E_DCC); |
| dq_pad |= |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSP_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSN_TX_E_DCC; |
| ccfifo_writel(emc, dq_pad, |
| EMC_PMACRO_DATA_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, rfu1 & ~0x01120112, |
| EMC_PMACRO_BRICK_CTRL_RFU1, 0); |
| } else { |
| ccfifo_writel(emc, rfu1 & ~0x01120112, |
| EMC_PMACRO_BRICK_CTRL_RFU1, seq_wait); |
| ramp_down_wait += 100000; |
| } |
| |
| ccfifo_writel(emc, rfu1 & ~0x01bf01bf, |
| EMC_PMACRO_BRICK_CTRL_RFU1, seq_wait); |
| ramp_down_wait += 100000; |
| |
| if (clk < (1000000 / IOBRICK_DCC_THRESHOLD)) { |
| cmd_pad &= |
| ~(EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQ_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_CMD_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSP_TX_E_DCC | |
| EMC_PMACRO_CMD_PAD_TX_CTRL_CMD_DQSN_TX_E_DCC); |
| ccfifo_writel(emc, cmd_pad, |
| EMC_PMACRO_CMD_PAD_TX_CTRL, seq_wait); |
| ramp_down_wait += 100000; |
| |
| dq_pad &= |
| ~(EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQ_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_CMD_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSP_TX_E_DCC | |
| EMC_PMACRO_DATA_PAD_TX_CTRL_DATA_DQSN_TX_E_DCC); |
| ccfifo_writel(emc, dq_pad, |
| EMC_PMACRO_DATA_PAD_TX_CTRL, 0); |
| ccfifo_writel(emc, rfu1 & ~0x07ff07ff, |
| EMC_PMACRO_BRICK_CTRL_RFU1, 0); |
| } else { |
| ccfifo_writel(emc, rfu1 & ~0x07ff07ff, |
| EMC_PMACRO_BRICK_CTRL_RFU1, seq_wait); |
| ramp_down_wait += 100000; |
| } |
| } else { |
| ccfifo_writel(emc, rfu1 & ~0xffff07ff, |
| EMC_PMACRO_BRICK_CTRL_RFU1, seq_wait + 19); |
| ramp_down_wait += 100000 + (20 * clk); |
| } |
| |
| if (clk < (1000000 / DVFS_FGCG_MID_SPEED_THRESHOLD)) { |
| ramp_down_wait += 100000; |
| ccfifo_writel(emc, common_tx & ~0x5, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, seq_wait); |
| ramp_down_wait += 100000; |
| ccfifo_writel(emc, common_tx & ~0xf, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, seq_wait); |
| ramp_down_wait += 100000; |
| ccfifo_writel(emc, 0, 0, seq_wait); |
| ramp_down_wait += 100000; |
| } else { |
| ccfifo_writel(emc, common_tx & ~0xf, |
| EMC_PMACRO_COMMON_PAD_TX_CTRL, seq_wait); |
| } |
| |
| return ramp_down_wait; |
| } |
| |
| void tegra210_emc_reset_dram_clktree_values(struct tegra210_emc_timing *timing) |
| { |
| timing->current_dram_clktree[C0D0U0] = |
| timing->trained_dram_clktree[C0D0U0]; |
| timing->current_dram_clktree[C0D0U1] = |
| timing->trained_dram_clktree[C0D0U1]; |
| timing->current_dram_clktree[C1D0U0] = |
| timing->trained_dram_clktree[C1D0U0]; |
| timing->current_dram_clktree[C1D0U1] = |
| timing->trained_dram_clktree[C1D0U1]; |
| timing->current_dram_clktree[C1D1U0] = |
| timing->trained_dram_clktree[C1D1U0]; |
| timing->current_dram_clktree[C1D1U1] = |
| timing->trained_dram_clktree[C1D1U1]; |
| } |
| |
| static void update_dll_control(struct tegra210_emc *emc, u32 value, bool state) |
| { |
| unsigned int i; |
| |
| emc_writel(emc, value, EMC_CFG_DIG_DLL); |
| tegra210_emc_timing_update(emc); |
| |
| for (i = 0; i < emc->num_channels; i++) |
| tegra210_emc_wait_for_update(emc, i, EMC_CFG_DIG_DLL, |
| EMC_CFG_DIG_DLL_CFG_DLL_EN, |
| state); |
| } |
| |
| void tegra210_emc_dll_disable(struct tegra210_emc *emc) |
| { |
| u32 value; |
| |
| value = emc_readl(emc, EMC_CFG_DIG_DLL); |
| value &= ~EMC_CFG_DIG_DLL_CFG_DLL_EN; |
| |
| update_dll_control(emc, value, false); |
| } |
| |
| void tegra210_emc_dll_enable(struct tegra210_emc *emc) |
| { |
| u32 value; |
| |
| value = emc_readl(emc, EMC_CFG_DIG_DLL); |
| value |= EMC_CFG_DIG_DLL_CFG_DLL_EN; |
| |
| update_dll_control(emc, value, true); |
| } |
| |
| void tegra210_emc_adjust_timing(struct tegra210_emc *emc, |
| struct tegra210_emc_timing *timing) |
| { |
| u32 dsr_cntrl = timing->burst_regs[EMC_DYN_SELF_REF_CONTROL_INDEX]; |
| u32 pre_ref = timing->burst_regs[EMC_PRE_REFRESH_REQ_CNT_INDEX]; |
| u32 ref = timing->burst_regs[EMC_REFRESH_INDEX]; |
| |
| switch (emc->refresh) { |
| case TEGRA210_EMC_REFRESH_NOMINAL: |
| case TEGRA210_EMC_REFRESH_THROTTLE: |
| break; |
| |
| case TEGRA210_EMC_REFRESH_2X: |
| ref = REFRESH_SPEEDUP(ref, 2); |
| pre_ref = REFRESH_SPEEDUP(pre_ref, 2); |
| dsr_cntrl = REFRESH_SPEEDUP(dsr_cntrl, 2); |
| break; |
| |
| case TEGRA210_EMC_REFRESH_4X: |
| ref = REFRESH_SPEEDUP(ref, 4); |
| pre_ref = REFRESH_SPEEDUP(pre_ref, 4); |
| dsr_cntrl = REFRESH_SPEEDUP(dsr_cntrl, 4); |
| break; |
| |
| default: |
| dev_warn(emc->dev, "failed to set refresh: %d\n", emc->refresh); |
| return; |
| } |
| |
| emc_writel(emc, ref, emc->offsets->burst[EMC_REFRESH_INDEX]); |
| emc_writel(emc, pre_ref, |
| emc->offsets->burst[EMC_PRE_REFRESH_REQ_CNT_INDEX]); |
| emc_writel(emc, dsr_cntrl, |
| emc->offsets->burst[EMC_DYN_SELF_REF_CONTROL_INDEX]); |
| } |
| |
| static int tegra210_emc_set_rate(struct device *dev, |
| const struct tegra210_clk_emc_config *config) |
| { |
| struct tegra210_emc *emc = dev_get_drvdata(dev); |
| struct tegra210_emc_timing *timing = NULL; |
| unsigned long rate = config->rate; |
| s64 last_change_delay; |
| unsigned long flags; |
| unsigned int i; |
| |
| if (rate == emc->last->rate * 1000UL) |
| return 0; |
| |
| for (i = 0; i < emc->num_timings; i++) { |
| if (emc->timings[i].rate * 1000UL == rate) { |
| timing = &emc->timings[i]; |
| break; |
| } |
| } |
| |
| if (!timing) |
| return -EINVAL; |
| |
| if (rate > 204000000 && !timing->trained) |
| return -EINVAL; |
| |
| emc->next = timing; |
| last_change_delay = ktime_us_delta(ktime_get(), emc->clkchange_time); |
| |
| /* XXX use non-busy-looping sleep? */ |
| if ((last_change_delay >= 0) && |
| (last_change_delay < emc->clkchange_delay)) |
| udelay(emc->clkchange_delay - (int)last_change_delay); |
| |
| spin_lock_irqsave(&emc->lock, flags); |
| tegra210_emc_set_clock(emc, config->value); |
| emc->clkchange_time = ktime_get(); |
| emc->last = timing; |
| spin_unlock_irqrestore(&emc->lock, flags); |
| |
| return 0; |
| } |
| |
| /* |
| * debugfs interface |
| * |
| * The memory controller driver exposes some files in debugfs that can be used |
| * to control the EMC frequency. The top-level directory can be found here: |
| * |
| * /sys/kernel/debug/emc |
| * |
| * It contains the following files: |
| * |
| * - available_rates: This file contains a list of valid, space-separated |
| * EMC frequencies. |
| * |
| * - min_rate: Writing a value to this file sets the given frequency as the |
| * floor of the permitted range. If this is higher than the currently |
| * configured EMC frequency, this will cause the frequency to be |
| * increased so that it stays within the valid range. |
| * |
| * - max_rate: Similarily to the min_rate file, writing a value to this file |
| * sets the given frequency as the ceiling of the permitted range. If |
| * the value is lower than the currently configured EMC frequency, this |
| * will cause the frequency to be decreased so that it stays within the |
| * valid range. |
| */ |
| |
| static bool tegra210_emc_validate_rate(struct tegra210_emc *emc, |
| unsigned long rate) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < emc->num_timings; i++) |
| if (rate == emc->timings[i].rate * 1000UL) |
| return true; |
| |
| return false; |
| } |
| |
| static int tegra210_emc_debug_available_rates_show(struct seq_file *s, |
| void *data) |
| { |
| struct tegra210_emc *emc = s->private; |
| const char *prefix = ""; |
| unsigned int i; |
| |
| for (i = 0; i < emc->num_timings; i++) { |
| seq_printf(s, "%s%u", prefix, emc->timings[i].rate * 1000); |
| prefix = " "; |
| } |
| |
| seq_puts(s, "\n"); |
| |
| return 0; |
| } |
| DEFINE_SHOW_ATTRIBUTE(tegra210_emc_debug_available_rates); |
| |
| static int tegra210_emc_debug_min_rate_get(void *data, u64 *rate) |
| { |
| struct tegra210_emc *emc = data; |
| |
| *rate = emc->debugfs.min_rate; |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_debug_min_rate_set(void *data, u64 rate) |
| { |
| struct tegra210_emc *emc = data; |
| int err; |
| |
| if (!tegra210_emc_validate_rate(emc, rate)) |
| return -EINVAL; |
| |
| err = clk_set_min_rate(emc->clk, rate); |
| if (err < 0) |
| return err; |
| |
| emc->debugfs.min_rate = rate; |
| |
| return 0; |
| } |
| |
| DEFINE_DEBUGFS_ATTRIBUTE(tegra210_emc_debug_min_rate_fops, |
| tegra210_emc_debug_min_rate_get, |
| tegra210_emc_debug_min_rate_set, "%llu\n"); |
| |
| static int tegra210_emc_debug_max_rate_get(void *data, u64 *rate) |
| { |
| struct tegra210_emc *emc = data; |
| |
| *rate = emc->debugfs.max_rate; |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_debug_max_rate_set(void *data, u64 rate) |
| { |
| struct tegra210_emc *emc = data; |
| int err; |
| |
| if (!tegra210_emc_validate_rate(emc, rate)) |
| return -EINVAL; |
| |
| err = clk_set_max_rate(emc->clk, rate); |
| if (err < 0) |
| return err; |
| |
| emc->debugfs.max_rate = rate; |
| |
| return 0; |
| } |
| |
| DEFINE_DEBUGFS_ATTRIBUTE(tegra210_emc_debug_max_rate_fops, |
| tegra210_emc_debug_max_rate_get, |
| tegra210_emc_debug_max_rate_set, "%llu\n"); |
| |
| static int tegra210_emc_debug_temperature_get(void *data, u64 *temperature) |
| { |
| struct tegra210_emc *emc = data; |
| unsigned int value; |
| |
| if (!emc->debugfs.temperature) |
| value = tegra210_emc_get_temperature(emc); |
| else |
| value = emc->debugfs.temperature; |
| |
| *temperature = value; |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_debug_temperature_set(void *data, u64 temperature) |
| { |
| struct tegra210_emc *emc = data; |
| |
| if (temperature > 7) |
| return -EINVAL; |
| |
| emc->debugfs.temperature = temperature; |
| |
| return 0; |
| } |
| |
| DEFINE_DEBUGFS_ATTRIBUTE(tegra210_emc_debug_temperature_fops, |
| tegra210_emc_debug_temperature_get, |
| tegra210_emc_debug_temperature_set, "%llu\n"); |
| |
| static void tegra210_emc_debugfs_init(struct tegra210_emc *emc) |
| { |
| struct device *dev = emc->dev; |
| unsigned int i; |
| int err; |
| |
| emc->debugfs.min_rate = ULONG_MAX; |
| emc->debugfs.max_rate = 0; |
| |
| for (i = 0; i < emc->num_timings; i++) { |
| if (emc->timings[i].rate * 1000UL < emc->debugfs.min_rate) |
| emc->debugfs.min_rate = emc->timings[i].rate * 1000UL; |
| |
| if (emc->timings[i].rate * 1000UL > emc->debugfs.max_rate) |
| emc->debugfs.max_rate = emc->timings[i].rate * 1000UL; |
| } |
| |
| if (!emc->num_timings) { |
| emc->debugfs.min_rate = clk_get_rate(emc->clk); |
| emc->debugfs.max_rate = emc->debugfs.min_rate; |
| } |
| |
| err = clk_set_rate_range(emc->clk, emc->debugfs.min_rate, |
| emc->debugfs.max_rate); |
| if (err < 0) { |
| dev_err(dev, "failed to set rate range [%lu-%lu] for %pC\n", |
| emc->debugfs.min_rate, emc->debugfs.max_rate, |
| emc->clk); |
| return; |
| } |
| |
| emc->debugfs.root = debugfs_create_dir("emc", NULL); |
| |
| debugfs_create_file("available_rates", 0444, emc->debugfs.root, emc, |
| &tegra210_emc_debug_available_rates_fops); |
| debugfs_create_file("min_rate", 0644, emc->debugfs.root, emc, |
| &tegra210_emc_debug_min_rate_fops); |
| debugfs_create_file("max_rate", 0644, emc->debugfs.root, emc, |
| &tegra210_emc_debug_max_rate_fops); |
| debugfs_create_file("temperature", 0644, emc->debugfs.root, emc, |
| &tegra210_emc_debug_temperature_fops); |
| } |
| |
| static void tegra210_emc_detect(struct tegra210_emc *emc) |
| { |
| u32 value; |
| |
| /* probe the number of connected DRAM devices */ |
| value = mc_readl(emc->mc, MC_EMEM_ADR_CFG); |
| |
| if (value & MC_EMEM_ADR_CFG_EMEM_NUMDEV) |
| emc->num_devices = 2; |
| else |
| emc->num_devices = 1; |
| |
| /* probe the type of DRAM */ |
| value = emc_readl(emc, EMC_FBIO_CFG5); |
| emc->dram_type = value & 0x3; |
| |
| /* probe the number of channels */ |
| value = emc_readl(emc, EMC_FBIO_CFG7); |
| |
| if ((value & EMC_FBIO_CFG7_CH1_ENABLE) && |
| (value & EMC_FBIO_CFG7_CH0_ENABLE)) |
| emc->num_channels = 2; |
| else |
| emc->num_channels = 1; |
| } |
| |
| static int tegra210_emc_validate_timings(struct tegra210_emc *emc, |
| struct tegra210_emc_timing *timings, |
| unsigned int num_timings) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < num_timings; i++) { |
| u32 min_volt = timings[i].min_volt; |
| u32 rate = timings[i].rate; |
| |
| if (!rate) |
| return -EINVAL; |
| |
| if ((i > 0) && ((rate <= timings[i - 1].rate) || |
| (min_volt < timings[i - 1].min_volt))) |
| return -EINVAL; |
| |
| if (timings[i].revision != timings[0].revision) |
| continue; |
| } |
| |
| return 0; |
| } |
| |
| static int tegra210_emc_probe(struct platform_device *pdev) |
| { |
| struct thermal_cooling_device *cd; |
| unsigned long current_rate; |
| struct tegra210_emc *emc; |
| struct device_node *np; |
| unsigned int i; |
| int err; |
| |
| emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL); |
| if (!emc) |
| return -ENOMEM; |
| |
| emc->clk = devm_clk_get(&pdev->dev, "emc"); |
| if (IS_ERR(emc->clk)) |
| return PTR_ERR(emc->clk); |
| |
| platform_set_drvdata(pdev, emc); |
| spin_lock_init(&emc->lock); |
| emc->dev = &pdev->dev; |
| |
| emc->mc = devm_tegra_memory_controller_get(&pdev->dev); |
| if (IS_ERR(emc->mc)) |
| return PTR_ERR(emc->mc); |
| |
| emc->regs = devm_platform_ioremap_resource(pdev, 0); |
| if (IS_ERR(emc->regs)) |
| return PTR_ERR(emc->regs); |
| |
| for (i = 0; i < 2; i++) { |
| emc->channel[i] = devm_platform_ioremap_resource(pdev, 1 + i); |
| if (IS_ERR(emc->channel[i])) |
| return PTR_ERR(emc->channel[i]); |
| |
| } |
| |
| tegra210_emc_detect(emc); |
| np = pdev->dev.of_node; |
| |
| /* attach to the nominal and (optional) derated tables */ |
| err = of_reserved_mem_device_init_by_name(emc->dev, np, "nominal"); |
| if (err < 0) { |
| dev_err(emc->dev, "failed to get nominal EMC table: %d\n", err); |
| return err; |
| } |
| |
| err = of_reserved_mem_device_init_by_name(emc->dev, np, "derated"); |
| if (err < 0 && err != -ENODEV) { |
| dev_err(emc->dev, "failed to get derated EMC table: %d\n", err); |
| goto release; |
| } |
| |
| /* validate the tables */ |
| if (emc->nominal) { |
| err = tegra210_emc_validate_timings(emc, emc->nominal, |
| emc->num_timings); |
| if (err < 0) |
| goto release; |
| } |
| |
| if (emc->derated) { |
| err = tegra210_emc_validate_timings(emc, emc->derated, |
| emc->num_timings); |
| if (err < 0) |
| goto release; |
| } |
| |
| /* default to the nominal table */ |
| emc->timings = emc->nominal; |
| |
| /* pick the current timing based on the current EMC clock rate */ |
| current_rate = clk_get_rate(emc->clk) / 1000; |
| |
| for (i = 0; i < emc->num_timings; i++) { |
| if (emc->timings[i].rate == current_rate) { |
| emc->last = &emc->timings[i]; |
| break; |
| } |
| } |
| |
| if (i == emc->num_timings) { |
| dev_err(emc->dev, "no EMC table entry found for %lu kHz\n", |
| current_rate); |
| err = -ENOENT; |
| goto release; |
| } |
| |
| /* pick a compatible clock change sequence for the EMC table */ |
| for (i = 0; i < ARRAY_SIZE(tegra210_emc_sequences); i++) { |
| const struct tegra210_emc_sequence *sequence = |
| tegra210_emc_sequences[i]; |
| |
| if (emc->timings[0].revision == sequence->revision) { |
| emc->sequence = sequence; |
| break; |
| } |
| } |
| |
| if (!emc->sequence) { |
| dev_err(&pdev->dev, "sequence %u not supported\n", |
| emc->timings[0].revision); |
| err = -ENOTSUPP; |
| goto release; |
| } |
| |
| emc->offsets = &tegra210_emc_table_register_offsets; |
| emc->refresh = TEGRA210_EMC_REFRESH_NOMINAL; |
| |
| emc->provider.owner = THIS_MODULE; |
| emc->provider.dev = &pdev->dev; |
| emc->provider.set_rate = tegra210_emc_set_rate; |
| |
| emc->provider.configs = devm_kcalloc(&pdev->dev, emc->num_timings, |
| sizeof(*emc->provider.configs), |
| GFP_KERNEL); |
| if (!emc->provider.configs) { |
| err = -ENOMEM; |
| goto release; |
| } |
| |
| emc->provider.num_configs = emc->num_timings; |
| |
| for (i = 0; i < emc->provider.num_configs; i++) { |
| struct tegra210_emc_timing *timing = &emc->timings[i]; |
| struct tegra210_clk_emc_config *config = |
| &emc->provider.configs[i]; |
| u32 value; |
| |
| config->rate = timing->rate * 1000UL; |
| config->value = timing->clk_src_emc; |
| |
| value = timing->burst_mc_regs[MC_EMEM_ARB_MISC0_INDEX]; |
| |
| if ((value & MC_EMEM_ARB_MISC0_EMC_SAME_FREQ) == 0) |
| config->same_freq = false; |
| else |
| config->same_freq = true; |
| } |
| |
| err = tegra210_clk_emc_attach(emc->clk, &emc->provider); |
| if (err < 0) { |
| dev_err(&pdev->dev, "failed to attach to EMC clock: %d\n", err); |
| goto release; |
| } |
| |
| emc->clkchange_delay = 100; |
| emc->training_interval = 100; |
| dev_set_drvdata(emc->dev, emc); |
| |
| timer_setup(&emc->refresh_timer, tegra210_emc_poll_refresh, |
| TIMER_DEFERRABLE); |
| atomic_set(&emc->refresh_poll, 0); |
| emc->refresh_poll_interval = 1000; |
| |
| timer_setup(&emc->training, tegra210_emc_train, 0); |
| |
| tegra210_emc_debugfs_init(emc); |
| |
| cd = devm_thermal_of_cooling_device_register(emc->dev, np, "emc", emc, |
| &tegra210_emc_cd_ops); |
| if (IS_ERR(cd)) { |
| err = PTR_ERR(cd); |
| dev_err(emc->dev, "failed to register cooling device: %d\n", |
| err); |
| goto detach; |
| } |
| |
| return 0; |
| |
| detach: |
| debugfs_remove_recursive(emc->debugfs.root); |
| tegra210_clk_emc_detach(emc->clk); |
| release: |
| of_reserved_mem_device_release(emc->dev); |
| |
| return err; |
| } |
| |
| static void tegra210_emc_remove(struct platform_device *pdev) |
| { |
| struct tegra210_emc *emc = platform_get_drvdata(pdev); |
| |
| debugfs_remove_recursive(emc->debugfs.root); |
| tegra210_clk_emc_detach(emc->clk); |
| of_reserved_mem_device_release(emc->dev); |
| } |
| |
| static int __maybe_unused tegra210_emc_suspend(struct device *dev) |
| { |
| struct tegra210_emc *emc = dev_get_drvdata(dev); |
| int err; |
| |
| err = clk_rate_exclusive_get(emc->clk); |
| if (err < 0) { |
| dev_err(emc->dev, "failed to acquire clock: %d\n", err); |
| return err; |
| } |
| |
| emc->resume_rate = clk_get_rate(emc->clk); |
| |
| clk_set_rate(emc->clk, 204000000); |
| tegra210_clk_emc_detach(emc->clk); |
| |
| dev_dbg(dev, "suspending at %lu Hz\n", clk_get_rate(emc->clk)); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused tegra210_emc_resume(struct device *dev) |
| { |
| struct tegra210_emc *emc = dev_get_drvdata(dev); |
| int err; |
| |
| err = tegra210_clk_emc_attach(emc->clk, &emc->provider); |
| if (err < 0) { |
| dev_err(dev, "failed to attach to EMC clock: %d\n", err); |
| return err; |
| } |
| |
| clk_set_rate(emc->clk, emc->resume_rate); |
| clk_rate_exclusive_put(emc->clk); |
| |
| dev_dbg(dev, "resuming at %lu Hz\n", clk_get_rate(emc->clk)); |
| |
| return 0; |
| } |
| |
| static const struct dev_pm_ops tegra210_emc_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(tegra210_emc_suspend, tegra210_emc_resume) |
| }; |
| |
| static const struct of_device_id tegra210_emc_of_match[] = { |
| { .compatible = "nvidia,tegra210-emc", }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, tegra210_emc_of_match); |
| |
| static struct platform_driver tegra210_emc_driver = { |
| .driver = { |
| .name = "tegra210-emc", |
| .of_match_table = tegra210_emc_of_match, |
| .pm = &tegra210_emc_pm_ops, |
| }, |
| .probe = tegra210_emc_probe, |
| .remove_new = tegra210_emc_remove, |
| }; |
| |
| module_platform_driver(tegra210_emc_driver); |
| |
| MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); |
| MODULE_AUTHOR("Joseph Lo <josephl@nvidia.com>"); |
| MODULE_DESCRIPTION("NVIDIA Tegra210 EMC driver"); |
| MODULE_LICENSE("GPL v2"); |
