leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ram: stm32: add stm32h7 support

Browse Source 
STM32F7 and H7 shared the same SDRAM control block.
On STM32H7 few control bits has been added.
The current driver need some minor adaptation as FMC block
enable/disable for H7.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2017-07-18 17:37:29 +02:00 committed by Tom Rini
parent 4eefb0070d
commit 7016651eac
1 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/ram/stm32_sdram.c
View File

@ -54,6 +54,12 @@ struct stm32_fmc_regs {
u32 sdsr; /* SDRAM Status register */
};
/*
* NOR/PSRAM Control register BCR1
* FMC controller Enable, only availabe for H7
*/
#define FMC_BCR1_FMCEN BIT(31)
/* Control register SDCR */
#define FMC_SDCR_RPIPE_SHIFT 13 /* RPIPE bit shift */
#define FMC_SDCR_RBURST_SHIFT 12 /* RBURST bit shift */
@ -123,6 +129,11 @@ enum stm32_fmc_bank {
MAX_SDRAM_BANK,
};
enum stm32_fmc_family {
STM32F7_FMC,
STM32H7_FMC,
};
struct bank_params {
struct stm32_sdram_control *sdram_control;
struct stm32_sdram_timing *sdram_timing;
@ -134,6 +145,7 @@ struct stm32_sdram_params {
struct stm32_fmc_regs *base;
u8 no_sdram_banks;
struct bank_params bank_params[MAX_SDRAM_BANK];
enum stm32_fmc_family family;
};
#define SDRAM_MODE_BL_SHIFT 0
@ -151,6 +163,10 @@ int stm32_sdram_init(struct udevice *dev)
u32 ref_count;
u8 i;
/* disable the FMC controller */
if (params->family == STM32H7_FMC)
clrbits_le32(&regs->bcr1, FMC_BCR1_FMCEN);
for (i = 0; i < params->no_sdram_banks; i++) {
control = params->bank_params[i].sdram_control;
timing = params->bank_params[i].sdram_timing;
@ -193,6 +209,7 @@ int stm32_sdram_init(struct udevice *dev)
| timing->txsr << FMC_SDTR_TXSR_SHIFT
| timing->tmrd << FMC_SDTR_TMRD_SHIFT,
&regs->sdtr2);
if (target_bank == SDRAM_BANK1)
ctb = FMC_SDCMR_BANK_1;
else
@ -225,6 +242,10 @@ int stm32_sdram_init(struct udevice *dev)
writel(ref_count << 1, &regs->sdrtr);
}
/* enable the FMC controller */
if (params->family == STM32H7_FMC)
setbits_le32(&regs->bcr1, FMC_BCR1_FMCEN);
return 0;
}
@ -305,6 +326,7 @@ static int stm32_fmc_probe(struct udevice *dev)
return -EINVAL;
params->base = (struct stm32_fmc_regs *)addr;
params->family = dev_get_driver_data(dev);
#ifdef CONFIG_CLK
struct clk clk;
@ -337,7 +359,8 @@ static struct ram_ops stm32_fmc_ops = {
};
static const struct udevice_id stm32_fmc_ids[] = {
{ .compatible = "st,stm32-fmc" },
{ .compatible = "st,stm32-fmc", .data = STM32F7_FMC },
{ .compatible = "st,stm32h7-fmc", .data = STM32H7_FMC },
{ }
};