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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <fdt_support.h>
#include <asm/arch/sys_proto.h>
#include <dt-bindings/pinctrl/stm32-pinfunc.h>
#include <linux/io.h>
#define ETZPC_DECPROT(n) (STM32_ETZPC_BASE + 0x10 + 4 * (n))
#define ETZPC_DECPROT_NB 6
#define DECPROT_MASK 0x03
#define NB_PROT_PER_REG 0x10
#define DECPROT_NB_BITS 2
#define DECPROT_SECURED 0x00
#define DECPROT_WRITE_SECURE 0x01
#define DECPROT_MCU_ISOLATION 0x02
#define DECPROT_NON_SECURED 0x03
#define ETZPC_RESERVED 0xffffffff
static const u32 stm32mp1_ip_addr[] = {
0x5c008000, /* 00 stgenc */
0x54000000, /* 01 bkpsram */
0x5c003000, /* 02 iwdg1 */
0x5c000000, /* 03 usart1 */
0x5c001000, /* 04 spi6 */
0x5c002000, /* 05 i2c4 */
ETZPC_RESERVED, /* 06 reserved */
0x54003000, /* 07 rng1 */
0x54002000, /* 08 hash1 */
0x54001000, /* 09 cryp1 */
0x5a003000, /* 0A ddrctrl */
0x5a004000, /* 0B ddrphyc */
0x5c009000, /* 0C i2c6 */
ETZPC_RESERVED, /* 0D reserved */
ETZPC_RESERVED, /* 0E reserved */
ETZPC_RESERVED, /* 0F reserved */
0x40000000, /* 10 tim2 */
0x40001000, /* 11 tim3 */
0x40002000, /* 12 tim4 */
0x40003000, /* 13 tim5 */
0x40004000, /* 14 tim6 */
0x40005000, /* 15 tim7 */
0x40006000, /* 16 tim12 */
0x40007000, /* 17 tim13 */
0x40008000, /* 18 tim14 */
0x40009000, /* 19 lptim1 */
0x4000a000, /* 1A wwdg1 */
0x4000b000, /* 1B spi2 */
0x4000c000, /* 1C spi3 */
0x4000d000, /* 1D spdifrx */
0x4000e000, /* 1E usart2 */
0x4000f000, /* 1F usart3 */
0x40010000, /* 20 uart4 */
0x40011000, /* 21 uart5 */
0x40012000, /* 22 i2c1 */
0x40013000, /* 23 i2c2 */
0x40014000, /* 24 i2c3 */
0x40015000, /* 25 i2c5 */
0x40016000, /* 26 cec */
0x40017000, /* 27 dac */
0x40018000, /* 28 uart7 */
0x40019000, /* 29 uart8 */
ETZPC_RESERVED, /* 2A reserved */
ETZPC_RESERVED, /* 2B reserved */
0x4001c000, /* 2C mdios */
ETZPC_RESERVED, /* 2D reserved */
ETZPC_RESERVED, /* 2E reserved */
ETZPC_RESERVED, /* 2F reserved */
0x44000000, /* 30 tim1 */
0x44001000, /* 31 tim8 */
ETZPC_RESERVED, /* 32 reserved */
0x44003000, /* 33 usart6 */
0x44004000, /* 34 spi1 */
0x44005000, /* 35 spi4 */
0x44006000, /* 36 tim15 */
0x44007000, /* 37 tim16 */
0x44008000, /* 38 tim17 */
0x44009000, /* 39 spi5 */
0x4400a000, /* 3A sai1 */
0x4400b000, /* 3B sai2 */
0x4400c000, /* 3C sai3 */
0x4400d000, /* 3D dfsdm */
0x4400e000, /* 3E tt_fdcan */
ETZPC_RESERVED, /* 3F reserved */
0x50021000, /* 40 lptim2 */
0x50022000, /* 41 lptim3 */
0x50023000, /* 42 lptim4 */
0x50024000, /* 43 lptim5 */
0x50027000, /* 44 sai4 */
0x50025000, /* 45 vrefbuf */
0x4c006000, /* 46 dcmi */
0x4c004000, /* 47 crc2 */
0x48003000, /* 48 adc */
0x4c002000, /* 49 hash2 */
0x4c003000, /* 4A rng2 */
0x4c005000, /* 4B cryp2 */
ETZPC_RESERVED, /* 4C reserved */
ETZPC_RESERVED, /* 4D reserved */
ETZPC_RESERVED, /* 4E reserved */
ETZPC_RESERVED, /* 4F reserved */
ETZPC_RESERVED, /* 50 sram1 */
ETZPC_RESERVED, /* 51 sram2 */
ETZPC_RESERVED, /* 52 sram3 */
ETZPC_RESERVED, /* 53 sram4 */
ETZPC_RESERVED, /* 54 retram */
0x49000000, /* 55 otg */
0x48004000, /* 56 sdmmc3 */
0x48005000, /* 57 dlybsd3 */
0x48000000, /* 58 dma1 */
0x48001000, /* 59 dma2 */
0x48002000, /* 5A dmamux */
0x58002000, /* 5B fmc */
0x58003000, /* 5C qspi */
0x58004000, /* 5D dlybq */
0x5800a000, /* 5E eth */
ETZPC_RESERVED, /* 5F reserved */
};
/* fdt helper */
static bool fdt_disable_subnode_by_address(void *fdt, int offset, u32 addr)
{
int node;
for (node = fdt_first_subnode(fdt, offset);
node >= 0;
node = fdt_next_subnode(fdt, node)) {
if (addr == (u32)fdt_getprop(fdt, node, "reg", 0)) {
if (fdtdec_get_is_enabled(fdt, node)) {
fdt_status_disabled(fdt, node);
return true;
}
return false;
}
}
return false;
}
static int stm32_fdt_fixup_etzpc(void *fdt)
{
const u32 *array;
int array_size, i;
int soc_node, offset, shift;
u32 addr, status, decprot[ETZPC_DECPROT_NB];
array = stm32mp1_ip_addr;
array_size = ARRAY_SIZE(stm32mp1_ip_addr);
for (i = 0; i < ETZPC_DECPROT_NB; i++)
decprot[i] = readl(ETZPC_DECPROT(i));
soc_node = fdt_path_offset(fdt, "/soc");
if (soc_node < 0)
return soc_node;
for (i = 0; i < array_size; i++) {
offset = i / NB_PROT_PER_REG;
shift = (i % NB_PROT_PER_REG) * DECPROT_NB_BITS;
status = (decprot[offset] >> shift) & DECPROT_MASK;
addr = array[i];
debug("ETZPC: 0x%08x decprot %d=%d\n", addr, i, status);
if (addr == ETZPC_RESERVED ||
status == DECPROT_NON_SECURED)
continue;
if (fdt_disable_subnode_by_address(fdt, soc_node, addr))
printf("ETZPC: 0x%08x node disabled, decprot %d=%d\n",
addr, i, status);
}
return 0;
}
/*
* This function is called right before the kernel is booted. "blob" is the
* device tree that will be passed to the kernel.
*/
int ft_system_setup(void *blob, bd_t *bd)
{
int ret = 0;
u32 pkg;
if (CONFIG_IS_ENABLED(STM32_ETZPC)) {
ret = stm32_fdt_fixup_etzpc(blob);
if (ret)
return ret;
}
switch (get_cpu_package()) {
case PKG_AA_LBGA448:
pkg = STM32MP_PKG_AA;
break;
case PKG_AB_LBGA354:
pkg = STM32MP_PKG_AB;
break;
case PKG_AC_TFBGA361:
pkg = STM32MP_PKG_AC;
break;
case PKG_AD_TFBGA257:
pkg = STM32MP_PKG_AD;
break;
default:
pkg = 0;
break;
}
if (pkg) {
do_fixup_by_compat_u32(blob, "st,stm32mp157-pinctrl",
"st,package", pkg, false);
do_fixup_by_compat_u32(blob, "st,stm32mp157-z-pinctrl",
"st,package", pkg, false);
}
return ret;
}
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