From bf1ae4426b89bd8b3e036e012acc4bc88fec4c6e Mon Sep 17 00:00:00 2001 From: Vikas Manocha Date: Mon, 10 Apr 2017 15:02:51 -0700 Subject: stm32f7: sdram: move sdram driver code to ram drivers area Signed-off-by: Vikas Manocha cc: Christophe KERELLO --- board/st/stm32f746-disco/stm32f746-disco.c | 113 +---------------------------- 1 file changed, 1 insertion(+), 112 deletions(-) (limited to 'board/st') diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c index fdad8d13a7c..15693588137 100644 --- a/board/st/stm32f746-disco/stm32f746-disco.c +++ b/board/st/stm32f746-disco/stm32f746-disco.c @@ -10,7 +10,6 @@ #include #include #include -#include #include #include #include @@ -106,57 +105,8 @@ out: return rv; } -static inline u32 _ns2clk(u32 ns, u32 freq) -{ - u32 tmp = freq/1000000; - return (tmp * ns) / 1000; -} - -#define NS2CLK(ns) (_ns2clk(ns, freq)) - -/* - * Following are timings for IS42S16400J, from corresponding datasheet - */ -#define SDRAM_CAS 3 /* 3 cycles */ -#define SDRAM_NB 1 /* Number of banks */ -#define SDRAM_MWID 1 /* 16 bit memory */ - -#define SDRAM_NR 0x1 /* 12-bit row */ -#define SDRAM_NC 0x0 /* 8-bit col */ -#define SDRAM_RBURST 0x1 /* Single read requests always as bursts */ -#define SDRAM_RPIPE 0x0 /* No HCLK clock cycle delay */ - -#define SDRAM_TRRD NS2CLK(12) -#define SDRAM_TRCD NS2CLK(18) -#define SDRAM_TRP NS2CLK(18) -#define SDRAM_TRAS NS2CLK(42) -#define SDRAM_TRC NS2CLK(60) -#define SDRAM_TRFC NS2CLK(60) -#define SDRAM_TCDL (1 - 1) -#define SDRAM_TRDL NS2CLK(12) -#define SDRAM_TBDL (1 - 1) -#define SDRAM_TREF (NS2CLK(64000000 / 8192) - 20) -#define SDRAM_TCCD (1 - 1) - -#define SDRAM_TXSR SDRAM_TRFC /* Row cycle time after precharge */ -#define SDRAM_TMRD 1 /* Page 10, Mode Register Set */ - - -/* Last data in to row precharge, need also comply ineq on page 1648 */ -#define SDRAM_TWR max(\ - (int)max((int)SDRAM_TRDL, (int)(SDRAM_TRAS - SDRAM_TRCD)), \ - (int)(SDRAM_TRC - SDRAM_TRCD - SDRAM_TRP)\ -) - - -#define SDRAM_MODE_BL_SHIFT 0 -#define SDRAM_MODE_CAS_SHIFT 4 -#define SDRAM_MODE_BL 0 -#define SDRAM_MODE_CAS SDRAM_CAS - int dram_init(void) { - u32 freq; int rv; rv = fmc_setup_gpio(); @@ -164,67 +114,7 @@ int dram_init(void) return rv; clock_setup(FMC_CLOCK_CFG); - - /* - * Get frequency for NS2CLK calculation. - */ - freq = clock_get(CLOCK_AHB) / CONFIG_SYS_RAM_FREQ_DIV; - - writel( - CONFIG_SYS_RAM_FREQ_DIV << FMC_SDCR_SDCLK_SHIFT - | SDRAM_CAS << FMC_SDCR_CAS_SHIFT - | SDRAM_NB << FMC_SDCR_NB_SHIFT - | SDRAM_MWID << FMC_SDCR_MWID_SHIFT - | SDRAM_NR << FMC_SDCR_NR_SHIFT - | SDRAM_NC << FMC_SDCR_NC_SHIFT - | SDRAM_RPIPE << FMC_SDCR_RPIPE_SHIFT - | SDRAM_RBURST << FMC_SDCR_RBURST_SHIFT, - &STM32_SDRAM_FMC->sdcr1); - - writel( - SDRAM_TRCD << FMC_SDTR_TRCD_SHIFT - | SDRAM_TRP << FMC_SDTR_TRP_SHIFT - | SDRAM_TWR << FMC_SDTR_TWR_SHIFT - | SDRAM_TRC << FMC_SDTR_TRC_SHIFT - | SDRAM_TRAS << FMC_SDTR_TRAS_SHIFT - | SDRAM_TXSR << FMC_SDTR_TXSR_SHIFT - | SDRAM_TMRD << FMC_SDTR_TMRD_SHIFT, - &STM32_SDRAM_FMC->sdtr1); - - writel(FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_START_CLOCK, - &STM32_SDRAM_FMC->sdcmr); - - udelay(200); /* 200 us delay, page 10, "Power-Up" */ - FMC_BUSY_WAIT(); - - writel(FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_PRECHARGE, - &STM32_SDRAM_FMC->sdcmr); - - udelay(100); - FMC_BUSY_WAIT(); - - writel((FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_AUTOREFRESH - | 7 << FMC_SDCMR_NRFS_SHIFT), &STM32_SDRAM_FMC->sdcmr); - - udelay(100); - FMC_BUSY_WAIT(); - - writel(FMC_SDCMR_BANK_1 | (SDRAM_MODE_BL << SDRAM_MODE_BL_SHIFT - | SDRAM_MODE_CAS << SDRAM_MODE_CAS_SHIFT) - << FMC_SDCMR_MODE_REGISTER_SHIFT | FMC_SDCMR_MODE_WRITE_MODE, - &STM32_SDRAM_FMC->sdcmr); - - udelay(100); - - FMC_BUSY_WAIT(); - - writel(FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_NORMAL, - &STM32_SDRAM_FMC->sdcmr); - - FMC_BUSY_WAIT(); - - /* Refresh timer */ - writel(SDRAM_TREF, &STM32_SDRAM_FMC->sdrtr); + stm32_sdram_init(); /* * Fill in global info with description of SRAM configuration @@ -233,7 +123,6 @@ int dram_init(void) gd->bd->bi_dram[0].size = CONFIG_SYS_RAM_SIZE; gd->ram_size = CONFIG_SYS_RAM_SIZE; - return rv; } -- cgit v1.2.3