static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_16_BITS
			| AT91C_DDRC2_MD_DDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9	/* 10 column bits */
			| AT91C_DDRC2_NR_14		/* 14 row bits(8K)*/
			| AT91C_DDRC2_CAS_3		/* CAS Latency 3 */
			| AT91C_DDRC2_EBISHARE		/* DQM is shared with other controller */
			| AT91C_DDRC2_DLL_RESET_DISABLED);	/* DLL not reset*/

	ddramc_config->rtr = 0x24B;

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)	/* 6 * 7.5 = 45 ns */
			| AT91C_DDRC2_TRCD_(2)		/* 2 * 7.5 = 22.5 ns */
			| AT91C_DDRC2_TWR_(2)		/* 2 * 7.5 = 15 ns */
			| AT91C_DDRC2_TRC_(8)		/* 8 * 7.5 = 75 ns */
			| AT91C_DDRC2_TRP_(2)		/* 2 * 7.5 = 22.5 ns */
			| AT91C_DDRC2_TRRD_(1)		/* 1 * 7.5 = 7.5 ns */
			| AT91C_DDRC2_TWTR_(1)		/* 1 clock cycle */
			| AT91C_DDRC2_TMRD_(2));	/* 2 clock cycles */

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)	/* 2 * 7.5 = 15 ns */
			| AT91C_DDRC2_TXSRD_(200)	/* 200 clock cycles */
			| AT91C_DDRC2_TXSNR_(16)	/* 16 * 7.5 = 120 ns */
			| AT91C_DDRC2_TRFC_(14));	/* 14 * 7.5 = 142 ns */

	ddramc_config->t2pr = (AT91C_DDRC2_TRTP_(1)	/* 1 * 7.5 = 7.5 ns */
			| AT91C_DDRC2_TRPA_(0)		/* 0 * 7.5 = 0 ns */
			| AT91C_DDRC2_TXARDS_(7)	/* 7 clock cycles */
			| AT91C_DDRC2_TXARD_(2));	/* 2 clock cycles */
}
Пример #2
0
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS |
			      AT91C_DDRC2_MD_DDR3_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9 |
			     AT91C_DDRC2_NR_14 |
			     AT91C_DDRC2_CAS_5 |
			     AT91C_DDRC2_DIS_DLL_DISABLED |
			     AT91C_DDRC2_WEAK_STRENGTH_RZQ7 |
			     AT91C_DDRC2_NB_BANKS_8 |
			     AT91C_DDRC2_DECOD_INTERLEAVED |
			     AT91C_DDRC2_UNAL_SUPPORTED);

	/*
	 * According to MT41K128M16 datasheet
	 * Maximum fresh period: 64ms, refresh count: 8k
	 */
#ifdef CONFIG_BUS_SPEED_166MHZ
	/* Refresh Timer is (64ms / 8k) * 166MHz = 1297(0x511) */
	ddramc_config->rtr = 0x511;

	/*
	 * According to the sama5d2 datasheet and the following values:
	 * T Sens = 0.75%/C, V Sens = 0.2%/mV, T driftrate = 1C/sec and V driftrate = 15 mV/s
	 * Warning: note that the values T driftrate and V driftrate are dependent on
	 * the application environment.
	 * ZQCS period is 1.5 / ((0.75 x 1) + (0.2 x 15)) = 0.4s
	 * If tref is 7.8us, we have: 400000 / 7.8 = 51282(0xC852)
	 * */
	ddramc_config->cal_mr4r = AT91C_DDRC2_COUNT_CAL(0xC852);

	/* DDR3 ZQCS */
	ddramc_config->tim_calr = AT91C_DDRC2_ZQCS(64);

	/* Assume timings for 8ns min clock period */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6) |
			       AT91C_DDRC2_TRCD_(3) |
			       AT91C_DDRC2_TWR_(4) |
			       AT91C_DDRC2_TRC_(9) |
			       AT91C_DDRC2_TRP_(3) |
			       AT91C_DDRC2_TRRD_(4) |
			       AT91C_DDRC2_TWTR_(4) |
			       AT91C_DDRC2_TMRD_(4));

	ddramc_config->t1pr = (AT91C_DDRC2_TRFC_(27) |
			       AT91C_DDRC2_TXSNR_(29) |
			       AT91C_DDRC2_TXSRD_(0) |
			       AT91C_DDRC2_TXP_(3));

	ddramc_config->t2pr = (AT91C_DDRC2_TXARD_(0) |
			       AT91C_DDRC2_TXARDS_(0) |
			       AT91C_DDRC2_TRPA_(0) |
			       AT91C_DDRC2_TRTP_(4) |
			       AT91C_DDRC2_TFAW_(7));
#else
#error "No CLK setting defined"
#endif
}
/* Using the Micron MT47H64M16HR-3 */
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_16_BITS
			| AT91C_DDRC2_MD_DDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9 /* 10 column bits(1K) */
			| AT91C_DDRC2_NR_13              /* 13 row bits (8K) */
			| AT91C_DDRC2_CAS_3              /* CAS Latency 3 */
			| AT91C_DDRC2_NB_BANKS_8         /* 8 banks */
			| AT91C_DDRC2_DLL_RESET_DISABLED /* DLL not reset */
			| AT91C_DDRC2_DECOD_INTERLEAVED);/*Interleaved decode*/

	/*
	 * Make sure to uncomment the following line if the DDR controller
	 * shares the EBI with another memory controller (SMC, NAND,..).
	 * For instance, AT91C_DDRC2_EBISHARE shall be set if NAND flash
	 * data line 0 is positioned on EBI data line 0 (AT91C_EBI_NFD0_ON_D16 bit
	 * cleared in CCFG_EBICSA register).
	 *
	 * For Atmel AT91SAM9x5-EK revision B onwards, this AT91C_DDRC2_EBISHARE bit
	 * is cleared because the NAND flash data line 0 is positioned on EBI
	 * data line number 16 (AT91C_EBI_NFD0_ON_D16 bit set in CCFG_EBICSA
	 * register). Only the DDR controller function is thus used on lower
	 * EBI data lines.
	 */
	//ddramc_config->cr |= AT91C_DDRC2_EBISHARE;       /* DQM is shared with other controller */


	/*
	 * The DDR2-SDRAM device requires a refresh every 15.625 us or 7.81 us.
	 * With a 133 MHz frequency, the refresh timer count register must to be
	 * set with (15.625 x 133 MHz) ~ 2084 i.e. 0x824
	 * or (7.81 x 133 MHz) ~ 1040 i.e. 0x410.
	 */
	ddramc_config->rtr = 0x411;     /* Refresh timer: 7.8125us */

	/* One clock cycle @ 133 MHz = 7.5 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)	/* 6 * 7.5 = 45 ns */
			| AT91C_DDRC2_TRCD_(2)		/* 2 * 7.5 = 22.5 ns */
			| AT91C_DDRC2_TWR_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TRC_(8)		/* 8 * 7.5 = 75   ns */
			| AT91C_DDRC2_TRP_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TRRD_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TWTR_(2)		/* 2 clock cycles min */
			| AT91C_DDRC2_TMRD_(2));	/* 2 clock cycles */

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)	/*  2 clock cycles */
			| AT91C_DDRC2_TXSRD_(200)	/* 200 clock cycles */
			| AT91C_DDRC2_TXSNR_(19)	/* 19 * 7.5 = 142.5 ns*/
			| AT91C_DDRC2_TRFC_(18));	/* 18 * 7.5 = 135 ns */

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(7)	/* 7 * 7.5 = 52.5 ns */
			| AT91C_DDRC2_TRTP_(2)		/* 2 clock cycles min */
			| AT91C_DDRC2_TRPA_(3)		/* 3 * 7.5 = 22.5 ns */
			| AT91C_DDRC2_TXARDS_(7)	/* 7 clock cycles */
			| AT91C_DDRC2_TXARD_(2));	/* 2 clock cycles */
}
static void lpddr2_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS |
			      AT91C_DDRC2_MD_LPDDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9 |
			     AT91C_DDRC2_NR_14 |
			     AT91C_DDRC2_CAS_3 |
			     AT91C_DDRC2_ZQ_SHORT |
			     AT91C_DDRC2_NB_BANKS_8 |
			     AT91C_DDRC2_UNAL_SUPPORTED);

	ddramc_config->lpddr2_lpr = AT91C_LPDDRC2_DS(0x03);

#ifdef CONFIG_BUS_SPEED_166MHZ
	/*
	 * The MT42128M32 refresh window: 32ms
	 * Required number of REFRESH commands(MIN): 8192
	 * (32ms / 8192) * 166MHz = 0x288.
	 */
	ddramc_config->rtr = 0x288;
	/* 90n short calibration: ZQCS */
	ddramc_config->tim_calr = AT91C_DDRC2_ZQCS(12);

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(7) |
			       AT91C_DDRC2_TRCD_(3) |
			       AT91C_DDRC2_TWR_(3) |
			       AT91C_DDRC2_TRC_(11) |
			       AT91C_DDRC2_TRP_(4) |
			       AT91C_DDRC2_TRRD_(2) |
			       AT91C_DDRC2_TWTR_(2) |
			       AT91C_DDRC2_TMRD_(3));

	ddramc_config->t1pr = (AT91C_DDRC2_TRFC_(35) |
				AT91C_DDRC2_TXSNR_(37) |
				AT91C_DDRC2_TXSRD_(0) |
				AT91C_DDRC2_TXP_(2));

	ddramc_config->t2pr = (AT91C_DDRC2_TXARD_(0) |
			       AT91C_DDRC2_TXARDS_(0) |
			       AT91C_DDRC2_TRPA_(0) |
			       AT91C_DDRC2_TRTP_(2) |
			       AT91C_DDRC2_TFAW_(9));
#else
#error "No CLK setting defined"
#endif
}
Пример #5
0
static void lpddr1_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS |
			      AT91C_DDRC2_MD_LP_DDR_SDRAM);

	/* 14 Row bits, 10 Column bits */
	ddramc_config->cr = (AT91C_DDRC2_NC_DDR11_SDR10 |
			     AT91C_DDRC2_NR_14 |
			     AT91C_DDRC2_CAS_3 |
			     AT91C_DDRC2_NDQS_DISABLED |
			     AT91C_DDRC2_UNAL_SUPPORTED);

	ddramc_config->lpr = 0;

	/*
	 * According to MT46H128M16LF-5 IT datasheet
	 * Maximum fresh period: 64ms, refresh count: 8k
	 */
#ifdef CONFIG_BUS_SPEED_166MHZ
	/* Refresh Timer is (64ms / 8k) * 166MHz = 1297(0x511) */
	ddramc_config->rtr = 0x511;

	/* Assume the timings for 6ns min clock period */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(7) |
			       AT91C_DDRC2_TRCD_(3) |
			       AT91C_DDRC2_TWR_(3) |
			       AT91C_DDRC2_TRC_(10) |
			       AT91C_DDRC2_TRP_(3) |
			       AT91C_DDRC2_TRRD_(2) |
			       AT91C_DDRC2_TWTR_(2) |
			       AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TRFC_(12)  |
			       AT91C_DDRC2_TXSNR_(19) |
			       AT91C_DDRC2_TXSRD_(0) |
			       AT91C_DDRC2_TXP_(2));

	ddramc_config->t2pr = (AT91C_DDRC2_TXARD_(0) |
			       AT91C_DDRC2_TXARDS_(0) |
			       AT91C_DDRC2_TRPA_(0) |
			       AT91C_DDRC2_TRTP_(0) |
			       AT91C_DDRC2_TFAW_(0));
#else
#error "No CLK setting defined"
#endif
}
Пример #6
0
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS
				| AT91C_DDRC2_MD_DDR3_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9
				| AT91C_DDRC2_NR_14
				| AT91C_DDRC2_CAS_5
				| AT91C_DDRC2_DIS_DLL_DISABLED
				| AT91C_DDRC2_WEAK_STRENGTH_RZQ7
				| AT91C_DDRC2_NB_BANKS_8
				| AT91C_DDRC2_DECOD_INTERLEAVED
				| AT91C_DDRC2_UNAL_SUPPORTED);

	/*
	 * According to MT41K128M16 datasheet
	 * Maximum fresh period: 64ms, refresh count: 8k
	 */
#ifdef CONFIG_BUS_SPEED_166MHZ
	/* Refresh Timer is (64ms / 8k) * 166MHz = 1297(0x511) */
	ddramc_config->rtr = 0x511;

	/* Assume timings for 8ns min clock period */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(4)
			| AT91C_DDRC2_TRC_(9)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(4)
			| AT91C_DDRC2_TWTR_(4)
			| AT91C_DDRC2_TMRD_(4));

	ddramc_config->t1pr = (AT91C_DDRC2_TRFC_(27)
			| AT91C_DDRC2_TXSNR_(29)
			| AT91C_DDRC2_TXSRD_(0)
			| AT91C_DDRC2_TXP_(3));

	ddramc_config->t2pr = (AT91C_DDRC2_TXARD_(0)
			| AT91C_DDRC2_TXARDS_(0)
			| AT91C_DDRC2_TRPA_(0)
			| AT91C_DDRC2_TRTP_(4)
			| AT91C_DDRC2_TFAW_(7));
#else
#error "No CLK setting defined"
#endif
}
Пример #7
0
static void lpddr2_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS
				| AT91C_DDRC2_MD_LPDDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9
				| AT91C_DDRC2_NR_14
				| AT91C_DDRC2_CAS_3
				| AT91C_DDRC2_ZQ_SHORT
				| AT91C_DDRC2_NB_BANKS_8
				| AT91C_DDRC2_UNAL_SUPPORTED);

	ddramc_config->lpddr2_lpr = AT91C_LPDDRC2_DS(0x03);
	/* 90n short calibration: ZQCS */
	ddramc_config->tim_calr = AT91C_DDRC2_ZQCS(12);

	/*
	 * The MT42128M32 refresh window: 32ms
	 * Required number of REFRESH commands(MIN): 8192
	 * (32ms / 8192) * 132MHz = 514 i.e. 0x202
	 */
	ddramc_config->rtr = 0x202;

	ddramc_config->cal_mr4r = AT91C_DDRC2_COUNT_CAL(0xC852);

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)
			| AT91C_DDRC2_TRCD_(2)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(8)
			| AT91C_DDRC2_TRP_(2)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(3));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSNR_(18)
			| AT91C_DDRC2_TRFC_(17));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(8)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(3)
			| AT91C_DDRC2_TXARDS_(1)
			| AT91C_DDRC2_TXARD_(1));
}
Пример #8
0
static void lpddr3_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS |
			      AT91C_DDRC2_MD_LPDDR3_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9 |
			     AT91C_DDRC2_NR_14 |
			     AT91C_DDRC2_CAS_3 |
			     AT91C_DDRC2_ZQ_INIT |
			     AT91C_DDRC2_NB_BANKS_8 |
			     AT91C_DDRC2_DECOD_SEQUENTIAL |
			     AT91C_DDRC2_UNAL_SUPPORTED);

	ddramc_config->lpddr2_lpr = AT91C_LPDDRC2_DS(0x04);

#ifdef CONFIG_BUS_SPEED_166MHZ
	/* The low-power DDR3-SDRAM device requires a refresh every 3.9 us.*/
	ddramc_config->rtr = 0x288;

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(7) |
			       AT91C_DDRC2_TRCD_(3) |
			       AT91C_DDRC2_TWR_(3) |
			       AT91C_DDRC2_TRC_(11) |
			       AT91C_DDRC2_TRP_(4) |
			       AT91C_DDRC2_TRRD_(2) |
			       AT91C_DDRC2_TWTR_(4) |
			       AT91C_DDRC2_TMRD_(10));

	ddramc_config->t1pr = (AT91C_DDRC2_TRFC_(35) |
			       AT91C_DDRC2_TXSNR_(37) |
			       AT91C_DDRC2_TXSRD_(0) |
			       AT91C_DDRC2_TXP_(2));

	ddramc_config->t2pr = (AT91C_DDRC2_TXARD_(0) |
			       AT91C_DDRC2_TXARDS_(0) |
			       AT91C_DDRC2_TRPA_(0) |
			       AT91C_DDRC2_TRTP_(4) |
			       AT91C_DDRC2_TFAW_(9));
#else
#error "No CLK setting defined"
#endif
}
Пример #9
0
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS
				| AT91C_DDRC2_MD_DDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9
				| AT91C_DDRC2_NR_14
				| AT91C_DDRC2_CAS_3
				| AT91C_DDRC2_DLL_RESET_DISABLED
				| AT91C_DDRC2_DIS_DLL_DISABLED
				| AT91C_DDRC2_NB_BANKS_8
				| AT91C_DDRC2_DECOD_INTERLEAVED
				| AT91C_DDRC2_UNAL_SUPPORTED);


#if defined(CONFIG_BUS_SPEED_133MHZ)

	ddramc_config->rtr = 0x208;

	/* One clock cycle @ 133 MHz = 7.5 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)
			| AT91C_DDRC2_TRCD_(2)
			| AT91C_DDRC2_TWR_(2)
			| AT91C_DDRC2_TRC_(8)
			| AT91C_DDRC2_TRP_(2)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(19)
			| AT91C_DDRC2_TRFC_(17));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(5)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(2)
			| AT91C_DDRC2_TXARDS_(2)
			| AT91C_DDRC2_TXARD_(8));

#elif defined(CONFIG_BUS_SPEED_148MHZ)

	ddramc_config->rtr = 0x243;

	/* One clock cycle @ 148 MHz = 6.7 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(7)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(9)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(31)
			| AT91C_DDRC2_TRFC_(30));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(7)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(3)
			| AT91C_DDRC2_TXARDS_(8)
			| AT91C_DDRC2_TXARD_(8));

#elif defined(CONFIG_BUS_SPEED_170MHZ)

	ddramc_config->rtr = 0x229;

	/* One clock cycle @ 170 MHz = 5.9 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(7)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(10)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(24)
			| AT91C_DDRC2_TRFC_(22));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(6)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(3)
			| AT91C_DDRC2_TXARDS_(2)
			| AT91C_DDRC2_TXARD_(8));

#elif defined(CONFIG_BUS_SPEED_176MHZ)

	ddramc_config->rtr = 0x2b0;

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(8)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(10)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(25)
			| AT91C_DDRC2_TRFC_(23));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(7)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(3)
			| AT91C_DDRC2_TXARDS_(2)
			| AT91C_DDRC2_TXARD_(8));

#else
#error "No CLK setting defined"
#endif
}
Пример #10
0
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_32_BITS
				| AT91C_DDRC2_MD_DDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9
				| AT91C_DDRC2_NR_13
				| AT91C_DDRC2_CAS_3
				| AT91C_DDRC2_DLL_RESET_DISABLED
				| AT91C_DDRC2_DIS_DLL_DISABLED
				| AT91C_DDRC2_ENRDM_ENABLE
				| AT91C_DDRC2_NB_BANKS_8
				| AT91C_DDRC2_NDQS_DISABLED
				| AT91C_DDRC2_DECOD_INTERLEAVED
				| AT91C_DDRC2_UNAL_SUPPORTED);

#if defined(CONFIG_BUS_SPEED_133MHZ)
	/*
	 * The DDR2-SDRAM device requires a refresh every 15.625 us or 7.81 us.
	 * With a 133 MHz frequency, the refresh timer count register must to be
	 * set with (15.625 x 133 MHz) ~ 2084 i.e. 0x824
	 * or (7.81 x 133 MHz) ~ 1039 i.e. 0x40F.
	 */
	ddramc_config->rtr = 0x40F;     /* Refresh timer: 7.812us */

	/* One clock cycle @ 133 MHz = 7.5 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(6)	/* 6 * 7.5 = 45 ns */
			| AT91C_DDRC2_TRCD_(2)		/* 2 * 7.5 = 22.5 ns */
			| AT91C_DDRC2_TWR_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TRC_(8)		/* 8 * 7.5 = 75   ns */
			| AT91C_DDRC2_TRP_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TRRD_(2)		/* 2 * 7.5 = 15   ns */
			| AT91C_DDRC2_TWTR_(2)		/* 2 clock cycles min */
			| AT91C_DDRC2_TMRD_(2));	/* 2 clock cycles */

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)	/* 2 clock cycles */
			| AT91C_DDRC2_TXSRD_(200)	/* 200 clock cycles */
			| AT91C_DDRC2_TXSNR_(19)	/* 19 * 7.5 = 142.5 ns */
			| AT91C_DDRC2_TRFC_(17));	/* 17 * 7.5 = 127.5 ns */

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(6)	/* 6 * 7.5 = 45 ns */
			| AT91C_DDRC2_TRTP_(2)		/* 2 clock cycles min */
			| AT91C_DDRC2_TRPA_(2)		/* 2 * 7.5 = 15 ns */
			| AT91C_DDRC2_TXARDS_(8)	/* = TXARD */
			| AT91C_DDRC2_TXARD_(8));	/* MR12 = 1 */

#elif defined(CONFIG_BUS_SPEED_166MHZ)
	/*
	 * The DDR2-SDRAM device requires a refresh of all rows every 64ms.
	 * ((64ms) / 8192) * 166MHz = 1296 i.e. 0x510
	 */
	ddramc_config->rtr = 0x510;

	/* One clock cycle @ 166 MHz = 6.0 ns */
	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(8)	/* 8 * 6 = 48 ns */
			| AT91C_DDRC2_TRCD_(3)		/* 3 * 6 = 18 ns */
			| AT91C_DDRC2_TWR_(3)		/* 3 * 6 = 18 ns */
			| AT91C_DDRC2_TRC_(10)		/* 10 * 6 = 60 ns */
			| AT91C_DDRC2_TRP_(3)		/* 3 * 6 = 18 ns */
			| AT91C_DDRC2_TRRD_(2)		/* 2 * 6 = 12 ns */
			| AT91C_DDRC2_TWTR_(2)		/* 2 clock cycles */
			| AT91C_DDRC2_TMRD_(2));	/* 2 clock cycles */

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)	/* 2 * 6 = 12ns */
			| AT91C_DDRC2_TXSRD_(200)	/* 200 clock cycles */
			| AT91C_DDRC2_TXSNR_(23)	/* 23 * 6 = 138 ns */
			| AT91C_DDRC2_TRFC_(22));	/* 22 * 6 = 132 ns */

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(8)	/* 45 ns */
			| AT91C_DDRC2_TRTP_(2)		/* 2 * 6 = 15ns */
			| AT91C_DDRC2_TRPA_(3)		/* 15 ns */
			| AT91C_DDRC2_TXARDS_(8)	/* = TXARD */
			| AT91C_DDRC2_TXARD_(8));	/* 8 clock cycles */

#else
#error "No bus clock provided!"
#endif
}
Пример #11
0
static void ddramc_reg_config(struct ddramc_register *ddramc_config)
{
	ddramc_config->mdr = (AT91C_DDRC2_DBW_16_BITS
				| AT91C_DDRC2_MD_DDR2_SDRAM);

	ddramc_config->cr = (AT91C_DDRC2_NC_DDR10_SDR9 /* 10 colum bit */
				| AT91C_DDRC2_NR_13
				| AT91C_DDRC2_CAS_3
				| AT91C_DDRC2_DLL_RESET_DISABLED
				| AT91C_DDRC2_DIS_DLL_DISABLED
				| AT91C_DDRC2_NB_BANKS_4
				| AT91C_DDRC2_DECOD_INTERLEAVED
				| AT91C_DDRC2_UNAL_SUPPORTED);

#if defined(CONFIG_BUS_SPEED_176MHZ)

	ddramc_config->rtr = 0x55f;

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(8)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(10)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(21)
			| AT91C_DDRC2_TRFC_(19));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(8)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(3)
			| AT91C_DDRC2_TXARDS_(8)
			| AT91C_DDRC2_TXARD_(8));

#elif defined(CONFIG_BUS_SPEED_200MHZ)

	ddramc_config->rtr = 0x61b;

	ddramc_config->t0pr = (AT91C_DDRC2_TRAS_(9)
			| AT91C_DDRC2_TRCD_(3)
			| AT91C_DDRC2_TWR_(3)
			| AT91C_DDRC2_TRC_(11)
			| AT91C_DDRC2_TRP_(3)
			| AT91C_DDRC2_TRRD_(2)
			| AT91C_DDRC2_TWTR_(2)
			| AT91C_DDRC2_TMRD_(2));

	ddramc_config->t1pr = (AT91C_DDRC2_TXP_(2)
			| AT91C_DDRC2_TXSRD_(200)
			| AT91C_DDRC2_TXSNR_(23)
			| AT91C_DDRC2_TRFC_(21));

	ddramc_config->t2pr = (AT91C_DDRC2_TFAW_(10)
			| AT91C_DDRC2_TRTP_(2)
			| AT91C_DDRC2_TRPA_(4)
			| AT91C_DDRC2_TXARDS_(8)
			| AT91C_DDRC2_TXARD_(2));

#else
#error "No CLK setting defined"
#endif
}