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/*
* (C) Copyright 2011, 2012, 2013
* Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
* Alexander Potashev, Emcraft Systems, aspotashev@emcraft.com
* Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
* Pavel Boldin, Emcraft Systems, paboldin@emcraft.com
*
* (C) Copyright 2015
* Kamil Lulko, <rev13@wp.pl>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/armv7m.h>
#include <asm/arch/stm32.h>
#include <asm/arch/gpio.h>
#include <asm/arch/fmc.h>
DECLARE_GLOBAL_DATA_PTR;
const struct stm32_gpio_ctl gpio_ctl_gpout = {
.mode = STM32_GPIO_MODE_OUT,
.otype = STM32_GPIO_OTYPE_PP,
.speed = STM32_GPIO_SPEED_50M,
.pupd = STM32_GPIO_PUPD_NO,
.af = STM32_GPIO_AF0
};
const struct stm32_gpio_ctl gpio_ctl_usart = {
.mode = STM32_GPIO_MODE_AF,
.otype = STM32_GPIO_OTYPE_PP,
.speed = STM32_GPIO_SPEED_50M,
.pupd = STM32_GPIO_PUPD_UP,
.af = STM32_GPIO_USART
};
static const struct stm32_gpio_dsc usart_gpio[] = {
{STM32_GPIO_PORT_X, STM32_GPIO_PIN_TX}, /* TX */
{STM32_GPIO_PORT_X, STM32_GPIO_PIN_RX}, /* RX */
};
int uart_setup_gpio(void)
{
int i;
int rv = 0;
for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) {
rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart);
if (rv)
goto out;
}
out:
return rv;
}
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_B, STM32_GPIO_PIN_6}, /* 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_C, STM32_GPIO_PIN_0}, /* 26, SDRAM_NWE */
{STM32_GPIO_PORT_B, STM32_GPIO_PIN_5}, /* 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;
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 STM32_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(14) - 1)
#define SDRAM_TRCD (NS2CLK(15) - 1)
#define SDRAM_TRP (NS2CLK(15) - 1)
#define SDRAM_TRAS (NS2CLK(42) - 1)
#define SDRAM_TRC (NS2CLK(63) - 1)
#define SDRAM_TRFC (NS2CLK(63) - 1)
#define SDRAM_TCDL (1 - 1)
#define SDRAM_TRDL (2 - 1)
#define SDRAM_TBDL (1 - 1)
#define SDRAM_TREF 1386
#define SDRAM_TCCD (1 - 1)
#define SDRAM_TXSR (NS2CLK(70) - 1)/* Row cycle time after precharge */
#define SDRAM_TMRD (3 - 1) /* Page 10, Mode Register Set */
/* Last data-in to row precharge, need also comply ineq from RM 37.7.5 */
#define SDRAM_TWR max(\
(int)max((int)SDRAM_TRDL, (int)(SDRAM_TRAS - SDRAM_TRCD - 1)), \
(int)(SDRAM_TRC - SDRAM_TRCD - SDRAM_TRP - 2)\
)
#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(&STM32_RCC->ahb3enr, STM32_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_RPIPE << FMC_SDCR_RPIPE_SHIFT
| SDRAM_RBURST << FMC_SDCR_RBURST_SHIFT,
&STM32_SDRAM_FMC->sdcr1);
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->sdcr2);
writel(SDRAM_TRP << FMC_SDTR_TRP_SHIFT
| SDRAM_TRC << FMC_SDTR_TRC_SHIFT,
&STM32_SDRAM_FMC->sdtr1);
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->sdtr2);
writel(FMC_SDCMR_BANK_2 | 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_2 | FMC_SDCMR_MODE_PRECHARGE,
&STM32_SDRAM_FMC->sdcmr);
udelay(100);
FMC_BUSY_WAIT();
writel((FMC_SDCMR_BANK_2 | FMC_SDCMR_MODE_AUTOREFRESH
| 7 << FMC_SDCMR_NRFS_SHIFT), &STM32_SDRAM_FMC->sdcmr);
udelay(100);
FMC_BUSY_WAIT();
writel(FMC_SDCMR_BANK_2 | (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_2 | 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;
}
u32 get_board_rev(void)
{
return 0;
}
int board_early_init_f(void)
{
int res;
res = uart_setup_gpio();
if (res)
return res;
return 0;
}
int board_init(void)
{
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
return 0;
}
|
