[PATCH 2/8] ppc asm: DDR headers
Renaud Barbier
renaud.barbier at ge.com
Tue Jun 25 06:45:31 EDT 2013
Definitions and structures have been added to record DIMM parameters
and configure memory options.
Signed-off-by: Renaud Barbier <renaud.barbier at ge.com>
---
arch/ppc/include/asm/fsl_ddr_dimm_params.h | 60 +++++++++++++
arch/ppc/include/asm/fsl_ddr_sdram.h | 131 +++++++++++++++++++++++++++-
2 files changed, 187 insertions(+), 4 deletions(-)
create mode 100644 arch/ppc/include/asm/fsl_ddr_dimm_params.h
diff --git a/arch/ppc/include/asm/fsl_ddr_dimm_params.h b/arch/ppc/include/asm/fsl_ddr_dimm_params.h
new file mode 100644
index 0000000..73c239b
--- /dev/null
+++ b/arch/ppc/include/asm/fsl_ddr_dimm_params.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ */
+
+#ifndef DDR2_DIMM_PARAMS_H
+#define DDR2_DIMM_PARAMS_H
+
+#define EDC_ECC 2
+
+/* Parameters for a DDR2 dimm computed from the SPD */
+struct dimm_params_s {
+ char mpart[19];
+ uint32_t n_ranks;
+ uint64_t rank_density;
+ uint64_t capacity;
+ uint32_t data_width;
+ uint32_t primary_sdram_width;
+ uint32_t ec_sdram_width;
+ uint32_t registered_dimm;
+ uint32_t n_row_addr;
+ uint32_t n_col_addr;
+ uint32_t edc_config; /* 0 = none, 1 = parity, 2 = ECC */
+ uint32_t n_banks_per_sdram_device;
+ uint32_t burst_lengths_bitmask; /* BL=4 bit 2, BL=8 = bit 3 */
+ uint32_t row_density;
+ uint64_t base_address;
+ /* SDRAM clock periods */
+ uint32_t tCKmin_X_ps;
+ uint32_t tCKmin_X_minus_1_ps;
+ uint32_t tCKmin_X_minus_2_ps;
+ uint32_t tCKmax_ps;
+ /* SPD-defined CAS latencies */
+ uint32_t caslat_X;
+ uint32_t caslat_X_minus_1;
+ uint32_t caslat_X_minus_2;
+ uint32_t caslat_lowest_derated;
+ /* basic timing parameters */
+ uint32_t tRCD_ps;
+ uint32_t tRP_ps;
+ uint32_t tRAS_ps;
+ uint32_t tWR_ps; /* maximum = 63750 ps */
+ uint32_t tWTR_ps; /* maximum = 63750 ps */
+ uint32_t tRFC_ps; /* max = 255 ns + 256 ns + .75 ns = 511750 ps */
+ uint32_t tRRD_ps; /* maximum = 63750 ps */
+ uint32_t tRC_ps; /* maximum = 254 ns + .75 ns = 254750 ps */
+ uint32_t refresh_rate_ps;
+ uint32_t tIS_ps; /* byte 32, spd->ca_setup */
+ uint32_t tIH_ps; /* byte 33, spd->ca_hold */
+ uint32_t tDS_ps; /* byte 34, spd->data_setup */
+ uint32_t tDH_ps; /* byte 35, spd->data_hold */
+ uint32_t tRTP_ps; /* byte 38, spd->trtp */
+ uint32_t tDQSQ_max_ps; /* byte 44, spd->tdqsq */
+ uint32_t tQHS_ps; /* byte 45, spd->tqhs */
+};
+
+#endif
diff --git a/arch/ppc/include/asm/fsl_ddr_sdram.h b/arch/ppc/include/asm/fsl_ddr_sdram.h
index ef793c9..444bcbc 100644
--- a/arch/ppc/include/asm/fsl_ddr_sdram.h
+++ b/arch/ppc/include/asm/fsl_ddr_sdram.h
@@ -10,9 +10,40 @@
#ifndef FSL_DDR_MEMCTL_H
#define FSL_DDR_MEMCTL_H
-/*
- * DDR_SDRAM_CFG - DDR SDRAM Control Configuration
- */
+#include <ddr_spd.h>
+
+/* Basic DDR Technology. */
+#define SDRAM_TYPE_DDR1 2
+#define SDRAM_TYPE_DDR2 3
+#define SDRAM_TYPE_LPDDR1 6
+#define SDRAM_TYPE_DDR3 7
+
+#define DDR_BL4 4
+#define DDR_BL8 8
+
+#define DDR2_RTT_OFF 0
+#define DDR2_RTT_75_OHM 1
+#define DDR2_RTT_150_OHM 2
+#define DDR2_RTT_50_OHM 3
+
+#if defined(CONFIG_FSL_DDR2)
+#define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR (3)
+typedef struct ddr2_spd_eeprom_s generic_spd_eeprom_t;
+#define FSL_SDRAM_TYPE SDRAM_TYPE_DDR2
+#endif
+
+#define FSL_DDR_ODT_NEVER 0x0
+#define FSL_DDR_ODT_CS 0x1
+#define FSL_DDR_ODT_ALL_OTHER_CS 0x2
+#define FSL_DDR_ODT_OTHER_DIMM 0x3
+#define FSL_DDR_ODT_ALL 0x4
+#define FSL_DDR_ODT_SAME_DIMM 0x5
+#define FSL_DDR_ODT_CS_AND_OTHER_DIMM 0x6
+#define FSL_DDR_ODT_OTHER_CS_ONSAMEDIMM 0x7
+
+#define SDRAM_CS_CONFIG_EN 0x80000000
+
+/* DDR_SDRAM_CFG - DDR SDRAM Control Configuration */
#define SDRAM_CFG_MEM_EN 0x80000000
#define SDRAM_CFG_SREN 0x40000000
#define SDRAM_CFG_ECC_EN 0x20000000
@@ -23,11 +54,103 @@
#define SDRAM_CFG_SDRAM_TYPE_SHIFT 24
#define SDRAM_CFG_DYN_PWR 0x00200000
#define SDRAM_CFG_32_BE 0x00080000
+#define SDRAM_CFG_16_BE 0x00100000
#define SDRAM_CFG_8_BE 0x00040000
#define SDRAM_CFG_NCAP 0x00020000
#define SDRAM_CFG_2T_EN 0x00008000
#define SDRAM_CFG_BI 0x00000001
-extern phys_size_t fixed_sdram(void);
+#define SDRAM_CFG2_D_INIT 0x00000010
+#define SDRAM_CFG2_ODT_CFG_MASK 0x00600000
+#define SDRAM_CFG2_ODT_NEVER 0
+#define SDRAM_CFG2_ODT_ONLY_WRITE 1
+#define SDRAM_CFG2_ODT_ONLY_READ 2
+#define SDRAM_CFG2_ODT_ALWAYS 3
+
+#define MAX_CHIP_SELECTS_PER_CTRL 4
+#define MAX_DIMM_SLOTS_PER_CTLR 4
+
+/*
+ * Memory controller characteristics and I2C parameters to
+ * read the SPD data.
+ */
+struct ddr_board_info_s {
+ uint32_t fsl_ddr_ver;
+ void __iomem *ddr_base;
+ uint32_t cs_per_ctrl;
+ uint32_t dimm_slots_per_ctrl;
+ uint32_t i2c_bus;
+ uint32_t i2c_slave;
+ uint32_t i2c_speed;
+ void __iomem *i2c_base;
+ uint8_t *spd_i2c_addr;
+};
+/*
+ * Generalized parameters for memory controller configuration,
+ * might be a little specific to the FSL memory controller
+ */
+struct memctl_options_s {
+ struct ddr_board_info_s *board_info;
+ uint32_t sdram_type;
+ /*
+ * Memory organization parameters
+ *
+ * if DIMM is present in the system
+ * where DIMMs are with respect to chip select
+ * where chip selects are with respect to memory boundaries
+ */
+ uint32_t registered_dimm_en;
+ /* Options local to a Chip Select */
+ struct cs_local_opts_s {
+ uint32_t auto_precharge;
+ uint32_t odt_rd_cfg;
+ uint32_t odt_wr_cfg;
+ uint32_t odt_rtt_norm;
+ uint32_t odt_rtt_wr;
+ } cs_local_opts[MAX_CHIP_SELECTS_PER_CTRL];
+ /* DLL reset disable */
+ uint32_t dll_rst_dis;
+ /* Operational mode parameters */
+ uint32_t ECC_mode;
+ uint32_t ECC_init_using_memctl;
+ uint32_t data_init;
+ /* Use DQS? maybe only with DDR2? */
+ uint32_t DQS_config;
+ uint32_t self_refresh_in_sleep;
+ uint32_t dynamic_power;
+ uint32_t data_bus_width;
+ uint32_t burst_length;
+ /* Global Timing Parameters */
+ uint32_t cas_latency_override;
+ uint32_t cas_latency_override_value;
+ uint32_t use_derated_caslat;
+ uint32_t additive_latency_override;
+ uint32_t additive_latency_override_value;
+ uint32_t clk_adjust;
+ uint32_t cpo_override;
+ uint32_t write_data_delay;
+ uint32_t half_strength_driver_enable;
+ uint32_t twoT_en;
+ uint32_t bstopre;
+ uint32_t tCKE_clock_pulse_width_ps;
+ uint32_t tFAW_window_four_activates_ps;
+ /* Rtt impedance */
+ uint32_t rtt_override;
+ uint32_t rtt_override_value;
+ /* Automatic self refresh */
+ uint32_t auto_self_refresh_en;
+ /* read-to-write turnaround */
+ uint32_t trwt_override;
+ uint32_t trwt;
+ /* Powerdon timings. */
+ uint32_t txp;
+ uint32_t taxpd;
+ uint32_t txard;
+ /* Load mode cycle time */
+ uint32_t tmrd;
+};
+
+extern phys_size_t fsl_ddr_sdram(void);
+extern phys_size_t fixed_sdram(void);
#endif
--
1.7.1
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