Commit beae540c authored by Vladimir Khusainov's avatar Vladimir Khusainov
Browse files

RT92026 Skeleton U-Boot port for the STM32F429 Discovery board.

The port tested on the Emcraft STM32F4 SOM Rev 1A.
parent ec7d8898
......@@ -3243,9 +3243,12 @@ stm-som-1a_config : unconfig
{ echo "#define CONFIG_SYS_BOARD_REV 0x1A" >>$(obj)include/config.h ; \
echo "...for STM-SOM Rev 1A" ; \
}
@$(MKCONFIG) -a stm-som arm arm_cortexm3 stm-som emcraft stm32
stm32f429-discovery_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm_cortexm3 stm32f429-discovery \
stm stm32
stm3220g-eval_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm_cortexm3 stm3220g-eval stm stm32
......
#
# (C) Copyright 2011,2012,2013
#
# Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
# Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
#
# See file CREDITS for list of people who contributed to this
# project.
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
LIB = $(obj)lib$(BOARD).a
COBJS := board.o
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
$(LIB): $(obj).depend $(OBJS)
$(AR) $(ARFLAGS) $@ $(OBJS)
clean:
rm -f $(OBJS)
distclean: clean
rm -f $(LIB) core *.bak $(obj).depend
#########################################################################
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
/*
* (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
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Board specific code for the STmicro STM32F429 Discovery board
*/
#include <common.h>
#include <netdev.h>
#include <ili932x.h>
#include <asm/arch/stm32.h>
#include <asm/arch/stm32f2_gpio.h>
#if CONFIG_SYS_BOARD_REV == 0x2A
# include <asm/arch/fmc.h>
# include <flash.h>
# include <asm/io.h>
# include <asm/system.h>
#endif
#include <asm/arch/fsmc.h>
#if CONFIG_SYS_BOARD_REV == 0x1A && (CONFIG_NR_DRAM_BANKS > 0)
/*
* Check if RAM configured
*/
# if !defined(CONFIG_SYS_RAM_CS) || !defined(CONFIG_SYS_FSMC_PSRAM_BCR) || \
!defined(CONFIG_SYS_FSMC_PSRAM_BTR)
# error "Incorrect PSRAM FSMC configuration."
# endif
#endif /* CONFIG_NR_DRAM_BANKS */
DECLARE_GLOBAL_DATA_PTR;
static const struct stm32f2_gpio_dsc ext_ram_fsmc_fmc_gpio[] = {
/* Chip is UFBGA176, see DM00077036.pdf for details */
/* N15, FMC_D15 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_10},
/* P14, FMC_D14 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_9},
/* P15, FMC_D13 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_8},
/* R11, FMC_D12 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_15},
/* P11, FMC_D11 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_14},
/* N11, FMC_D10 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_13},
/* R10, FMC_D9 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_12},
/* P10, FMC_D8 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_11},
/* R9, FMC_D7 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_10},
/* P9, FMC_D6 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_9},
/* P8, FMC_D5 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_8},
/* R8, FMC_D4 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_7},
/* C12, FMC_D3 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_1},
/* B12, FMC_D2 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_0},
/* L14, FMC_D1 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_15},
/* M14, FMC_D0 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_14},
/* A3, FMC_NBL1 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_1},
/* A4, FMC_NBL0 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_0},
/* D10, FMC_NOE */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_4},
/* C11, FMC_NWE */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_5},
/* B3, FMC_A22 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_6},
/* B2, FMC_A21 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_5},
/* B1, FMC_A20 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_4},
/* A1, FMC_A19 */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_3},
/* M15, FMC_A18 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_13},
/* N13, FMC_A17 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_12},
/* N14, FMC_A16 */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_11},
/* K13, FMC_A15, BA1 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_5},
/* K14, FMC_A14, BA0 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_4},
/* K15, FMC_A13 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_3},
/* L15, FMC_A12 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_2},
/* M7, FMC_A11 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_1},
/* N7, FMC_A10 */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_0},
/* P7, FMC_A9 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_15},
/* R7, FMC_A8 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_14},
/* N6, FMC_A7 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_13},
/* P6, FMC_A6 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_12},
/* K3, FMC_A5 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_5},
/* J3, FMC_A4 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_4},
/* J2, FMC_A3 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_3},
/* H2, FMC_A2 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_2},
/* H3, FMC_A1 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_1},
/* E2, FMC_A0 */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_0},
#if CONFIG_SYS_BOARD_REV == 0x2A
/* SDRAM only, Revision 0x2A */
/* M4, SDRAM_NE */
{STM32F2_GPIO_PORT_C, STM32F2_GPIO_PIN_2},
/* R6, SDRAM_NRAS */
{STM32F2_GPIO_PORT_F, STM32F2_GPIO_PIN_11},
/* B7, SDRAM_NCAS */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_15},
/* J4, SDRAM_NWE */
{STM32F2_GPIO_PORT_H, STM32F2_GPIO_PIN_5},
/* M5, SDRAM_CKE */
{STM32F2_GPIO_PORT_C, STM32F2_GPIO_PIN_3},
/* H14, SDRAM_CLK */
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_8},
#endif /* CONFIG_SYS_BOARD_REV == 0x2A */
#if CONFIG_SYS_BOARD_REV == 0x1A
/* PSRAM only */
/* B11, FMC_NWAIT */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_6},
/* A2, FMC_CRE */
{STM32F2_GPIO_PORT_E, STM32F2_GPIO_PIN_2},
/* B5, FMC_NL */
{STM32F2_GPIO_PORT_B, STM32F2_GPIO_PIN_7},
/* D11, FMC_CLK */
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_3},
#endif /* CONFIG_SYS_BOARD_REV == 0x1A */
#ifdef CONFIG_FSMC_NOR_PSRAM_CS1_ENABLE
{STM32F2_GPIO_PORT_D, STM32F2_GPIO_PIN_7},
#endif
#ifdef CONFIG_FSMC_NOR_PSRAM_CS2_ENABLE
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_9},
#endif
#ifdef CONFIG_FSMC_NOR_PSRAM_CS3_ENABLE
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_10},
#endif
#ifdef CONFIG_FSMC_NOR_PSRAM_CS4_ENABLE
{STM32F2_GPIO_PORT_G, STM32F2_GPIO_PIN_12},
#endif
};
/*
* Init FMC/FSMC GPIOs based
*/
static int fmc_fsmc_setup_gpio(void)
{
int rv = 0;
int i;
/*
* Connect GPIOs to FMC controller
*/
for (i = 0; i < ARRAY_SIZE(ext_ram_fsmc_fmc_gpio); i++) {
rv = stm32f2_gpio_config(&ext_ram_fsmc_fmc_gpio[i],
STM32F2_GPIO_ROLE_FMC);
if (rv)
goto out;
}
fsmc_gpio_init_done = 1;
out:
return rv;
}
/*
* Early hardware init.
*/
int board_init(void)
{
int rv;
#if CONFIG_SYS_BOARD_REV == 0x2A
int i;
char v;
#endif
rv = fmc_fsmc_setup_gpio();
if (rv)
return rv;
#if !defined(CONFIG_SYS_NO_FLASH)
#if CONFIG_SYS_BOARD_REV == 0x2A
/* Disable first bank */
fsmc_nor_psram_init(1, 0, 0, 0);
fsmc_nor_psram_init(3, 0, 0, 0);
fsmc_nor_psram_init(4, 0, 0, 0);
/*
* Put SDRAM in Self-refresh mode to workaround
* bug with Flash/SDRAM accessing,
* see errata 2.8.7
*/
STM32_RCC->ahb3enr |= 1;
__asm__ __volatile__ ("dsb" : : : "memory");
STM32_SDRAM_FMC->sdcr1 =
CONFIG_SYS_RAM_FREQ_DIV << FMC_SDCR_SDCLK_SHIFT;
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_START_CLOCK;
FMC_BUSY_WAIT();
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_SELFREFRESH;
FMC_BUSY_WAIT();
udelay(60);
#endif
if ((rv = fsmc_nor_psram_init(CONFIG_SYS_FLASH_CS, CONFIG_SYS_FSMC_FLASH_BCR,
CONFIG_SYS_FSMC_FLASH_BTR,
CONFIG_SYS_FSMC_FLASH_BWTR)))
return rv;
#if CONFIG_SYS_BOARD_REV == 0x2A
for (i = 1; i < 0x1000000; i <<= 1) {
v = *(volatile char*)(0x64000000 + i);
v = *(volatile char*)(0x64000000 + i - 1);
nop(); nop();
nop(); nop();
nop(); nop();
}
#endif
#endif
return 0;
}
/*
* Dump pertinent info to the console.
*/
int checkboard(void)
{
printf("Board: STM-SOM Rev %s, www.emcraft.com\n",
CONFIG_SYS_BOARD_REV_STR);
return 0;
}
#if CONFIG_SYS_BOARD_REV == 0x1A
/*
* Setup external RAM.
*/
int dram_init(void)
{
static struct stm32f2_gpio_dsc ctrl_gpio = {STM32F2_GPIO_PORT_I,
STM32F2_GPIO_PIN_9};
int rv = 0;
rv = fsmc_nor_psram_init(CONFIG_SYS_RAM_CS,
CONFIG_SYS_FSMC_PSRAM_BCR,
CONFIG_SYS_FSMC_PSRAM_BTR,
#ifdef CONFIG_SYS_FSMC_PSRAM_BWTR
CONFIG_SYS_FSMC_PSRAM_BWTR
#else
(u32)-1
#endif
);
if (rv != 0)
goto out;
rv = stm32f2_gpio_config(&ctrl_gpio, STM32F2_GPIO_ROLE_GPOUT);
if (rv != 0)
goto out;
# if defined(CONFIG_SYS_RAM_BURST)
/*
* FIXME: all this hardcoded stuff.
*/
/* Step.2 */
stm32f2_gpout_set(&ctrl_gpio, 1);
/* Step.3 */
*(volatile u16 *)(CONFIG_SYS_RAM_BASE + 0x0010223E) = 0;
/* Step.4-5 */
stm32f2_gpout_set(&ctrl_gpio, 0);
/* Step.6 */
fsmc_nor_psram_init(CONFIG_SYS_RAM_CS, 0x00083115,
0x0010FFFF, -1);
/* Step.7 */
rv = *(volatile u16 *)(CONFIG_SYS_RAM_BASE + 0x000000);
/* Step.8 */
fsmc_nor_psram_init(CONFIG_SYS_RAM_CS, 0x00005059,
0x10000702, 0x10000602);
/* Step.9 */
stm32f2_gpout_set(&ctrl_gpio, 1);
/* Step.10 */
*(volatile u16 *)(CONFIG_SYS_RAM_BASE + 0x0110223E) = 0;
/* Step.11 */
stm32f2_gpout_set(&ctrl_gpio, 0);
/* Step.12 */
fsmc_nor_psram_init(CONFIG_SYS_RAM_CS, 0x00083115,
0x0010FFFF, -1);
/* Step.13 */
rv = *(volatile u16 *)(CONFIG_SYS_RAM_BASE + 0x01000000);
# else
/*
* Switch PSRAM in the Asyncronous Read/Write Mode
*/
stm32f2_gpout_set(&ctrl_gpio, 0);
# endif /* CONFIG_SYS_RAM_BURST */
/*
* 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;
rv = 0;
out:
return rv;
}
#endif /* CONFIG_SYS_BOARD_REV == 0x1A */
#if CONFIG_SYS_BOARD_REV == 0x2A
/*
* STM32 RCC FMC specific definitions
*/
#define STM32_RCC_ENR_FMC (1 << 0) /* FMC module clock */
static int dram_initialized = 0;
static inline u32 _ns2clk(u32 ns, u32 freq)
{
uint32_t tmp = freq/1000000;
return (tmp * ns) / 1000;
}
#define NS2CLK(ns) (_ns2clk(ns, freq))
/*
* Following are timings for M12L2561616A-6BI, from corresponding datasheet
*/
#define SDRAM_CAS 3
#define SDRAM_NB 1 /* Number of banks */
#define SDRAM_MWID 1 /* 16 bit memory */
#define SDRAM_NR 0x2 /* 13-bit row */
#define SDRAM_NC 0x1 /* 9-bit col */
#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 (3 - 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)\
)
int dram_init(void)
{
u32 freq;
int rv;
/*
* Enable FMC interface clock
*/
STM32_RCC->ahb3enr |= STM32_RCC_ENR_FMC;
/*
* Get frequency for NS2CLK calculation.
*/
freq = clock_get(CLOCK_HCLK) / CONFIG_SYS_RAM_FREQ_DIV;
STM32_SDRAM_FMC->sdcr1 = (
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 |
0 << FMC_SDCR_RPIPE_SHIFT |
1 << FMC_SDCR_RBURST_SHIFT
);
STM32_SDRAM_FMC->sdtr1 = (
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->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_START_CLOCK;
udelay(200); /* 200 us delay, page 10, "Power-Up" */
FMC_BUSY_WAIT();
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_PRECHARGE;
udelay(100);
FMC_BUSY_WAIT();
STM32_SDRAM_FMC->sdcmr = (
FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_AUTOREFRESH |
7 << FMC_SDCMR_NRFS_SHIFT
);
udelay(100);
FMC_BUSY_WAIT();
#define SDRAM_MODE_BL_SHIFT 0
#define SDRAM_MODE_CAS_SHIFT 4
#define SDRAM_MODE_BL 0
#define SDRAM_MODE_CAS SDRAM_CAS
STM32_SDRAM_FMC->sdcmr = 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;
udelay(100);
FMC_BUSY_WAIT();
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_NORMAL;
FMC_BUSY_WAIT();
/* Refresh timer */
STM32_SDRAM_FMC->sdrtr = SDRAM_TREF;
/*
* 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;
rv = 0;
cortex_m3_mpu_full_access();
dram_initialized = 1;
return rv;
}
/*
* STM32 Flash bug workaround.
*/
extern char _mem_ram_buf_base, _mem_ram_buf_size;
#define SOC_RAM_BUFFER_BASE (ulong)(&_mem_ram_buf_base)
#define SOC_RAM_BUFFER_SIZE (ulong)((&_mem_ram_buf_size) - 0x100)
void stop_ram(void)
{
if (!dram_initialized)
return;
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_SELFREFRESH;
FMC_BUSY_WAIT();
}
void start_ram(void)
{
if (!dram_initialized)
return;
/*
* Precharge according to chip requirement, page 12.
*/
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_PRECHARGE;
FMC_BUSY_WAIT();
STM32_SDRAM_FMC->sdcmr = FMC_SDCMR_BANK_1 | FMC_SDCMR_MODE_NORMAL;
FMC_BUSY_WAIT();
udelay(60);
}
#define NOP10() do { nop(); nop(); nop(); nop(); nop(); \
nop(); nop(); nop(); nop(); nop(); \
} while(0);
u16 flash_read16(void *addr)
{
u16 value;
stop_ram();
value = __raw_readw(addr);
NOP10();
start_ram();