diff options
Diffstat (limited to 'board/st/stm32f746-disco/stm32f746-disco.c')
-rw-r--r-- | board/st/stm32f746-disco/stm32f746-disco.c | 239 |
1 files changed, 223 insertions, 16 deletions
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c index 0e04d14..47aa058 100644 --- a/board/st/stm32f746-disco/stm32f746-disco.c +++ b/board/st/stm32f746-disco/stm32f746-disco.c @@ -10,6 +10,8 @@ #include <asm/armv7m.h> #include <asm/arch/stm32.h> #include <asm/arch/gpio.h> +#include <asm/arch/rcc.h> +#include <asm/arch/fmc.h> #include <dm/platdata.h> #include <dm/platform_data/serial_stm32x7.h> #include <asm/arch/stm32_periph.h> @@ -30,12 +32,227 @@ const struct stm32_gpio_ctl gpio_ctl_usart = { .otype = STM32_GPIO_OTYPE_PP, .speed = STM32_GPIO_SPEED_50M, .pupd = STM32_GPIO_PUPD_UP, - .af = STM32_GPIO_AF7 + .af = STM32_GPIO_AF8 }; +const struct stm32_gpio_ctl gpio_ctl_fmc = { + .mode = STM32_GPIO_MODE_AF, + .otype = STM32_GPIO_OTYPE_PP, + .speed = STM32_GPIO_SPEED_100M, + .pupd = STM32_GPIO_PUPD_NO, + .af = STM32_GPIO_AF12 +}; + +static const struct stm32_gpio_dsc ext_ram_fmc_gpio[] = { + /* Chip is LQFP144, see DM00077036.pdf for details */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_10}, /* 79, FMC_D15 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_9}, /* 78, FMC_D14 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_8}, /* 77, FMC_D13 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_15}, /* 68, FMC_D12 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_14}, /* 67, FMC_D11 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_13}, /* 66, FMC_D10 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_12}, /* 65, FMC_D9 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_11}, /* 64, FMC_D8 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_10}, /* 63, FMC_D7 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_9}, /* 60, FMC_D6 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_8}, /* 59, FMC_D5 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_7}, /* 58, FMC_D4 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_1}, /* 115, FMC_D3 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_0}, /* 114, FMC_D2 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_15}, /* 86, FMC_D1 */ + {STM32_GPIO_PORT_D, STM32_GPIO_PIN_14}, /* 85, FMC_D0 */ + + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_1}, /* 142, FMC_NBL1 */ + {STM32_GPIO_PORT_E, STM32_GPIO_PIN_0}, /* 141, FMC_NBL0 */ + + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_5}, /* 90, FMC_A15, BA1 */ + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_4}, /* 89, FMC_A14, BA0 */ + + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_1}, /* 57, FMC_A11 */ + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_0}, /* 56, FMC_A10 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_15}, /* 55, FMC_A9 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_14}, /* 54, FMC_A8 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_13}, /* 53, FMC_A7 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_12}, /* 50, FMC_A6 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_5}, /* 15, FMC_A5 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_4}, /* 14, FMC_A4 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_3}, /* 13, FMC_A3 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_2}, /* 12, FMC_A2 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_1}, /* 11, FMC_A1 */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_0}, /* 10, FMC_A0 */ + + {STM32_GPIO_PORT_H, STM32_GPIO_PIN_3}, /* 136, SDRAM_NE */ + {STM32_GPIO_PORT_F, STM32_GPIO_PIN_11}, /* 49, SDRAM_NRAS */ + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_15}, /* 132, SDRAM_NCAS */ + {STM32_GPIO_PORT_H, STM32_GPIO_PIN_5}, /* 26, SDRAM_NWE */ + {STM32_GPIO_PORT_C, STM32_GPIO_PIN_3}, /* 135, SDRAM_CKE */ + + {STM32_GPIO_PORT_G, STM32_GPIO_PIN_8}, /* 93, SDRAM_CLK */ +}; + +static int fmc_setup_gpio(void) +{ + int rv = 0; + int i; + + clock_setup(GPIO_B_CLOCK_CFG); + clock_setup(GPIO_C_CLOCK_CFG); + clock_setup(GPIO_D_CLOCK_CFG); + clock_setup(GPIO_E_CLOCK_CFG); + clock_setup(GPIO_F_CLOCK_CFG); + clock_setup(GPIO_G_CLOCK_CFG); + clock_setup(GPIO_H_CLOCK_CFG); + + for (i = 0; i < ARRAY_SIZE(ext_ram_fmc_gpio); i++) { + rv = stm32_gpio_config(&ext_ram_fmc_gpio[i], + &gpio_ctl_fmc); + if (rv) + goto out; + } + +out: + return rv; +} + +/* + * STM32 RCC FMC specific definitions + */ +#define RCC_ENR_FMC (1 << 0) /* FMC module clock */ + +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(); + if (rv) + return rv; + + setbits_le32(RCC_BASE + RCC_AHB3ENR, RCC_ENR_FMC); + + /* + * 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); + + /* + * Fill in global info with description of SRAM configuration + */ + gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE; + gd->bd->bi_dram[0].size = CONFIG_SYS_RAM_SIZE; + + gd->ram_size = CONFIG_SYS_RAM_SIZE; + + return rv; +} + static const struct stm32_gpio_dsc usart_gpio[] = { - {STM32_GPIO_PORT_A, STM32_GPIO_PIN_9}, /* TX */ - {STM32_GPIO_PORT_B, STM32_GPIO_PIN_7}, /* RX */ + {STM32_GPIO_PORT_C, STM32_GPIO_PIN_6}, /* TX */ + {STM32_GPIO_PORT_C, STM32_GPIO_PIN_7}, /* RX */ }; int uart_setup_gpio(void) @@ -43,8 +260,7 @@ int uart_setup_gpio(void) int i; int rv = 0; - clock_setup(GPIO_A_CLOCK_CFG); - clock_setup(GPIO_B_CLOCK_CFG); + clock_setup(GPIO_C_CLOCK_CFG); for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) { rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart); if (rv) @@ -56,7 +272,7 @@ out: } static const struct stm32x7_serial_platdata serial_platdata = { - .base = (struct stm32_usart *)USART1_BASE, + .base = (struct stm32_usart *)USART6_BASE, .clock = CONFIG_SYS_CLK_FREQ, }; @@ -75,7 +291,7 @@ int board_early_init_f(void) int res; res = uart_setup_gpio(); - clock_setup(USART1_CLOCK_CFG); + clock_setup(USART6_CLOCK_CFG); if (res) return res; @@ -88,12 +304,3 @@ int board_init(void) return 0; } - -int dram_init(void) -{ - gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE; - gd->bd->bi_dram[0].size = CONFIG_SYS_RAM_SIZE; - - gd->ram_size = CONFIG_SYS_RAM_SIZE; - return 0; -} |