| /* |
| * Copyright (c) 2011 The Chromium OS Authors. |
| * (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #ifndef _ARCH_EMC_H_ |
| #define _ARCH_EMC_H_ |
| |
| #include <asm/types.h> |
| |
| #define TEGRA_EMC_NUM_REGS 46 |
| |
| /* EMC Registers */ |
| struct emc_ctlr { |
| u32 cfg; /* 0x00: EMC_CFG */ |
| u32 reserved0[3]; /* 0x04 ~ 0x0C */ |
| u32 adr_cfg; /* 0x10: EMC_ADR_CFG */ |
| u32 adr_cfg1; /* 0x14: EMC_ADR_CFG_1 */ |
| u32 reserved1[2]; /* 0x18 ~ 0x18 */ |
| u32 refresh_ctrl; /* 0x20: EMC_REFCTRL */ |
| u32 pin; /* 0x24: EMC_PIN */ |
| u32 timing_ctrl; /* 0x28: EMC_TIMING_CONTROL */ |
| u32 rc; /* 0x2C: EMC_RC */ |
| u32 rfc; /* 0x30: EMC_RFC */ |
| u32 ras; /* 0x34: EMC_RAS */ |
| u32 rp; /* 0x38: EMC_RP */ |
| u32 r2w; /* 0x3C: EMC_R2W */ |
| u32 w2r; /* 0x40: EMC_W2R */ |
| u32 r2p; /* 0x44: EMC_R2P */ |
| u32 w2p; /* 0x48: EMC_W2P */ |
| u32 rd_rcd; /* 0x4C: EMC_RD_RCD */ |
| u32 wd_rcd; /* 0x50: EMC_WD_RCD */ |
| u32 rrd; /* 0x54: EMC_RRD */ |
| u32 rext; /* 0x58: EMC_REXT */ |
| u32 wdv; /* 0x5C: EMC_WDV */ |
| u32 quse; /* 0x60: EMC_QUSE */ |
| u32 qrst; /* 0x64: EMC_QRST */ |
| u32 qsafe; /* 0x68: EMC_QSAFE */ |
| u32 rdv; /* 0x6C: EMC_RDV */ |
| u32 refresh; /* 0x70: EMC_REFRESH */ |
| u32 burst_refresh_num; /* 0x74: EMC_BURST_REFRESH_NUM */ |
| u32 pdex2wr; /* 0x78: EMC_PDEX2WR */ |
| u32 pdex2rd; /* 0x7c: EMC_PDEX2RD */ |
| u32 pchg2pden; /* 0x80: EMC_PCHG2PDEN */ |
| u32 act2pden; /* 0x84: EMC_ACT2PDEN */ |
| u32 ar2pden; /* 0x88: EMC_AR2PDEN */ |
| u32 rw2pden; /* 0x8C: EMC_RW2PDEN */ |
| u32 txsr; /* 0x90: EMC_TXSR */ |
| u32 tcke; /* 0x94: EMC_TCKE */ |
| u32 tfaw; /* 0x98: EMC_TFAW */ |
| u32 trpab; /* 0x9C: EMC_TRPAB */ |
| u32 tclkstable; /* 0xA0: EMC_TCLKSTABLE */ |
| u32 tclkstop; /* 0xA4: EMC_TCLKSTOP */ |
| u32 trefbw; /* 0xA8: EMC_TREFBW */ |
| u32 quse_extra; /* 0xAC: EMC_QUSE_EXTRA */ |
| u32 odt_write; /* 0xB0: EMC_ODT_WRITE */ |
| u32 odt_read; /* 0xB4: EMC_ODT_READ */ |
| u32 reserved2[5]; /* 0xB8 ~ 0xC8 */ |
| u32 mrs; /* 0xCC: EMC_MRS */ |
| u32 emrs; /* 0xD0: EMC_EMRS */ |
| u32 ref; /* 0xD4: EMC_REF */ |
| u32 pre; /* 0xD8: EMC_PRE */ |
| u32 nop; /* 0xDC: EMC_NOP */ |
| u32 self_ref; /* 0xE0: EMC_SELF_REF */ |
| u32 dpd; /* 0xE4: EMC_DPD */ |
| u32 mrw; /* 0xE8: EMC_MRW */ |
| u32 mrr; /* 0xEC: EMC_MRR */ |
| u32 reserved3; /* 0xF0: */ |
| u32 fbio_cfg1; /* 0xF4: EMC_FBIO_CFG1 */ |
| u32 fbio_dqsib_dly; /* 0xF8: EMC_FBIO_DQSIB_DLY */ |
| u32 fbio_dqsib_dly_msb; /* 0xFC: EMC_FBIO_DQSIB_DLY_MSG */ |
| u32 fbio_spare; /* 0x100: SBIO_SPARE */ |
| /* There are more registers ... */ |
| }; |
| |
| /** |
| * Set up the EMC for the given rate. The timing parameters are retrieved |
| * from the device tree "nvidia,tegra20-emc" node and its |
| * "nvidia,tegra20-emc-table" sub-nodes. |
| * |
| * @param blob Device tree blob |
| * @param rate Clock speed of memory controller in Hz (=2x memory bus rate) |
| * @return 0 if ok, else -ve error code (look in emc.c to decode it) |
| */ |
| int tegra_set_emc(const void *blob, unsigned rate); |
| |
| /** |
| * Get a pointer to the EMC controller from the device tree. |
| * |
| * @param blob Device tree blob |
| * @return pointer to EMC controller |
| */ |
| struct emc_ctlr *emc_get_controller(const void *blob); |
| |
| #endif |