/* * Header file for the Atmel DDR/SDR SDRAM Controller * * Copyright (C) 2010 Atmel Corporation * Nicolas Ferre * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef AT91SAM9_DDRSDR_H #define AT91SAM9_DDRSDR_H #define AT91_DDRSDRC_MR 0x00 /* Mode Register */ #define AT91_DDRSDRC_MODE (0x7 << 0) /* Command Mode */ #define AT91_DDRSDRC_MODE_NORMAL 0 #define AT91_DDRSDRC_MODE_NOP 1 #define AT91_DDRSDRC_MODE_PRECHARGE 2 #define AT91_DDRSDRC_MODE_LMR 3 #define AT91_DDRSDRC_MODE_REFRESH 4 #define AT91_DDRSDRC_MODE_EXT_LMR 5 #define AT91_DDRSDRC_MODE_DEEP 6 #define AT91_DDRSDRC_RTR 0x04 /* Refresh Timer Register */ #define AT91_DDRSDRC_COUNT (0xfff << 0) /* Refresh Timer Counter */ #define AT91_DDRSDRC_CR 0x08 /* Configuration Register */ #define AT91_DDRSDRC_NC (3 << 0) /* Number of Column Bits */ #define AT91_DDRSDRC_NC_SDR8 (0 << 0) #define AT91_DDRSDRC_NC_SDR9 (1 << 0) #define AT91_DDRSDRC_NC_SDR10 (2 << 0) #define AT91_DDRSDRC_NC_SDR11 (3 << 0) #define AT91_DDRSDRC_NC_DDR9 (0 << 0) #define AT91_DDRSDRC_NC_DDR10 (1 << 0) #define AT91_DDRSDRC_NC_DDR11 (2 << 0) #define AT91_DDRSDRC_NC_DDR12 (3 << 0) #define AT91_DDRSDRC_NR (3 << 2) /* Number of Row Bits */ #define AT91_DDRSDRC_NR_11 (0 << 2) #define AT91_DDRSDRC_NR_12 (1 << 2) #define AT91_DDRSDRC_NR_13 (2 << 2) #define AT91_DDRSDRC_NR_14 (3 << 2) #define AT91_DDRSDRC_CAS (7 << 4) /* CAS Latency */ #define AT91_DDRSDRC_CAS_2 (2 << 4) #define AT91_DDRSDRC_CAS_3 (3 << 4) #define AT91_DDRSDRC_CAS_25 (6 << 4) #define AT91_DDRSDRC_RST_DLL (1 << 7) /* Reset DLL */ #define AT91_DDRSDRC_DICDS (1 << 8) /* Output impedance control */ #define AT91_DDRSDRC_DIS_DLL (1 << 9) /* Disable DLL [SAM9 Only] */ #define AT91_DDRSDRC_OCD (1 << 12) /* Off-Chip Driver [SAM9 Only] */ #define AT91_DDRSDRC_DQMS (1 << 16) /* Mask Data is Shared [SAM9 Only] */ #define AT91_DDRSDRC_ACTBST (1 << 18) /* Active Bank X to Burst Stop Read Access Bank Y [SAM9 Only] */ #define AT91_DDRSDRC_NB (1 << 20) /* Number of Banks [not SAM9G45] */ #define AT91_SDRAMC_NB_4 (0 << 20) #define AT91_SDRAMC_NB_8 (1 << 20) #define AT91_DDRSDRC_T0PR 0x0C /* Timing 0 Register */ #define AT91_DDRSDRC_TRAS (0xf << 0) /* Active to Precharge delay */ #define AT91_DDRSDRC_TRCD (0xf << 4) /* Row to Column delay */ #define AT91_DDRSDRC_TWR (0xf << 8) /* Write recovery delay */ #define AT91_DDRSDRC_TRC (0xf << 12) /* Row cycle delay */ #define AT91_DDRSDRC_TRP (0xf << 16) /* Row precharge delay */ #define AT91_DDRSDRC_TRRD (0xf << 20) /* Active BankA to BankB */ #define AT91_DDRSDRC_TWTR (0x7 << 24) /* Internal Write to Read delay */ #define AT91CAP9_DDRSDRC_TWTR (1 << 24) /* Internal Write to Read delay */ #define AT91_DDRSDRC_RED_WRRD (0x1 << 27) /* Reduce Write to Read Delay [SAM9 Only] */ #define AT91_DDRSDRC_TMRD (0xf << 28) /* Load mode to active/refresh delay */ #define AT91_DDRSDRC_T1PR 0x10 /* Timing 1 Register */ #define AT91_DDRSDRC_TRFC (0x1f << 0) /* Row Cycle Delay */ #define AT91_DDRSDRC_TXSNR (0xff << 8) /* Exit self-refresh to non-read */ #define AT91_DDRSDRC_TXSRD (0xff << 16) /* Exit self-refresh to read */ #define AT91_DDRSDRC_TXP (0xf << 24) /* Exit power-down delay */ #define AT91_DDRSDRC_T2PR 0x14 /* Timing 2 Register [SAM9 Only] */ #define AT91_DDRSDRC_TXARD (0xf << 0) /* Exit active power down delay to read command in mode "Fast Exit" */ #define AT91_DDRSDRC_TXARDS (0xf << 4) /* Exit active power down delay to read command in mode "Slow Exit" */ #define AT91_DDRSDRC_TRPA (0xf << 8) /* Row Precharge All delay */ #define AT91_DDRSDRC_TRTP (0x7 << 12) /* Read to Precharge delay */ #define AT91_DDRSDRC_LPR 0x1C /* Low Power Register */ #define AT91CAP9_DDRSDRC_LPR 0x18 /* Low Power Register */ #define AT91_DDRSDRC_LPCB (3 << 0) /* Low-power Configurations */ #define AT91_DDRSDRC_LPCB_DISABLE 0 #define AT91_DDRSDRC_LPCB_SELF_REFRESH 1 #define AT91_DDRSDRC_LPCB_POWER_DOWN 2 #define AT91_DDRSDRC_LPCB_DEEP_POWER_DOWN 3 #define AT91_DDRSDRC_CLKFR (1 << 2) /* Clock Frozen */ #define AT91_DDRSDRC_PASR (7 << 4) /* Partial Array Self Refresh */ #define AT91_DDRSDRC_TCSR (3 << 8) /* Temperature Compensated Self Refresh */ #define AT91_DDRSDRC_DS (3 << 10) /* Drive Strength */ #define AT91_DDRSDRC_TIMEOUT (3 << 12) /* Time to define when Low Power Mode is enabled */ #define AT91_DDRSDRC_TIMEOUT_0_CLK_CYCLES (0 << 12) #define AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES (1 << 12) #define AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES (2 << 12) #define AT91_DDRSDRC_APDE (1 << 16) /* Active power down exit time */ #define AT91_DDRSDRC_UPD_MR (3 << 20) /* Update load mode register and extended mode register */ #define AT91_DDRSDRC_MDR 0x20 /* Memory Device Register */ #define AT91CAP9_DDRSDRC_MDR 0x1C /* Memory Device Register */ #define AT91_DDRSDRC_MD (3 << 0) /* Memory Device Type */ #define AT91_DDRSDRC_MD_SDR 0 #define AT91_DDRSDRC_MD_LOW_POWER_SDR 1 #define AT91CAP9_DDRSDRC_MD_DDR 2 #define AT91_DDRSDRC_MD_LOW_POWER_DDR 3 #define AT91_DDRSDRC_MD_DDR2 6 /* [SAM9 Only] */ #define AT91_DDRSDRC_DBW (1 << 4) /* Data Bus Width */ #define AT91_DDRSDRC_DBW_32BITS (0 << 4) #define AT91_DDRSDRC_DBW_16BITS (1 << 4) #define AT91_DDRSDRC_DLL 0x24 /* DLL Information Register */ #define AT91CAP9_DDRSDRC_DLL 0x20 /* DLL Information Register */ #define AT91_DDRSDRC_MDINC (1 << 0) /* Master Delay increment */ #define AT91_DDRSDRC_MDDEC (1 << 1) /* Master Delay decrement */ #define AT91_DDRSDRC_MDOVF (1 << 2) /* Master Delay Overflow */ #define AT91CAP9_DDRSDRC_SDCOVF (1 << 3) /* Slave Delay Correction Overflow */ #define AT91CAP9_DDRSDRC_SDCUDF (1 << 4) /* Slave Delay Correction Underflow */ #define AT91CAP9_DDRSDRC_SDERF (1 << 5) /* Slave Delay Correction error */ #define AT91_DDRSDRC_MDVAL (0xff << 8) /* Master Delay value */ #define AT91CAP9_DDRSDRC_SDVAL (0xff << 16) /* Slave Delay value */ #define AT91CAP9_DDRSDRC_SDCVAL (0xff << 24) /* Slave Delay Correction value */ #define AT91_DDRSDRC_HS 0x2C /* High Speed Register [SAM9 Only] */ #define AT91_DDRSDRC_DIS_ATCP_RD (1 << 2) /* Anticip read access is disabled */ #define AT91_DDRSDRC_DELAY(n) (0x30 + (0x4 * (n))) /* Delay I/O Register n */ #define AT91_DDRSDRC_WPMR 0xE4 /* Write Protect Mode Register [SAM9 Only] */ #define AT91_DDRSDRC_WP (1 << 0) /* Write protect enable */ #define AT91_DDRSDRC_WPKEY (0xffffff << 8) /* Write protect key */ #define AT91_DDRSDRC_KEY (0x444452 << 8) /* Write protect key = "DDR" */ #define AT91_DDRSDRC_WPSR 0xE8 /* Write Protect Status Register [SAM9 Only] */ #define AT91_DDRSDRC_WPVS (1 << 0) /* Write protect violation status */ #define AT91_DDRSDRC_WPVSRC (0xffff << 8) /* Write protect violation source */ #ifndef __ASSEMBLY__ #include static inline u32 at91_get_ddram_size(void * __iomem base, bool is_nb) { u32 cr; u32 mdr; u32 size; bool is_sdram; cr = __raw_readl(base + AT91_DDRSDRC_CR); mdr = __raw_readl(base + AT91_DDRSDRC_MDR); is_sdram = (mdr & AT91_DDRSDRC_MD) <= AT91_DDRSDRC_MD_LOW_POWER_SDR; /* Formula: * size = bank << (col + row + 1); * if (bandwidth == 32 bits) * size <<= 1; */ size = 1; /* COL */ size += (cr & AT91_DDRSDRC_NC) + 8; if (!is_sdram) size ++; /* ROW */ size += ((cr & AT91_DDRSDRC_NR) >> 2) + 11; /* BANK */ if (is_nb) size = ((cr & AT91_DDRSDRC_NB) ? 8 : 4) << size; else size = 4 << size; /* bandwidth */ if (!(mdr & AT91_DDRSDRC_DBW)) size <<= 1; return size; } #ifdef CONFIG_SOC_AT91SAM9G45 static inline u32 at91sam9g45_get_ddram_size(int bank) { switch (bank) { case 0: return at91_get_ddram_size(IOMEM(AT91SAM9G45_BASE_DDRSDRC0), false); case 1: return at91_get_ddram_size(IOMEM(AT91SAM9G45_BASE_DDRSDRC1), false); default: return 0; } } #else static inline u32 at91sam9g45_get_ddram_size(int bank) { return 0; } #endif #ifdef CONFIG_SOC_AT91SAM9X5 static inline u32 at91sam9x5_get_ddram_size(void) { return at91_get_ddram_size(IOMEM(AT91SAM9X5_BASE_DDRSDRC0), true); } #else static inline u32 at91sam9x5_get_ddram_size(void) { return 0; } #endif #ifdef CONFIG_SOC_AT91SAM9N12 static inline u32 at91sam9n12_get_ddram_size(void) { return at91_get_ddram_size(IOMEM(AT91SAM9N12_BASE_DDRSDRC0), true); } #else static inline u32 at91sam9n12_get_ddram_size(void) { return 0; } #endif #ifdef CONFIG_SOC_SAMA5 static inline u32 at91sama5_get_ddram_size(void) { u32 cr; u32 mdr; u32 size; void * __iomem base = IOMEM(SAMA5D3_BASE_MPDDRC); cr = __raw_readl(base + AT91_DDRSDRC_CR); mdr = __raw_readl(base + AT91_DDRSDRC_MDR); /* Formula: * size = bank << (col + row + 1); * if (bandwidth == 32 bits) * size <<= 1; */ size = 1; /* COL */ size += (cr & AT91_DDRSDRC_NC) + 9; /* ROW */ size += ((cr & AT91_DDRSDRC_NR) >> 2) + 11; /* BANK */ size = ((cr & AT91_DDRSDRC_NB) ? 8 : 4) << size; /* bandwidth */ if (!(mdr & AT91_DDRSDRC_DBW)) size <<= 1; return size; } #else static inline u32 at91sama5_get_ddram_size(void) { return 0; } #endif #endif #endif