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u-boot/arch/arm/mach-stm32mp/fdt.c
Patrick Delaunay f91783edf2 arm: stm32mp: handle the OP-TEE nodes in DT with FIP support 
With FIP support in TF-A (when CONFIG_STM32MP15x_STM32IMAGE
is not activated), the DT nodes needed by OP-TEE are added by OP-TEE
firmware in U-Boot device tree, present in FIP.

These nodes are only required in trusted boot, when TF-A load the file
u-boot.stm32, including the U-Boot device tree with STM32IMAGE header,
in this case OP-TEE can't update the U-Boot device tree.

Moreover in trusted boot mode with FIP, as the OP-TEE nodes are present
in U-Boot device tree only when needed the function
stm32_fdt_disable_optee can be removed.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
2021-08-16 09:34:27 +02:00

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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2019-2020, STMicroelectronics - All Rights Reserved
*/
#define LOG_CATEGORY LOGC_ARCH
#include <common.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <log.h>
#include <tee.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
#define STM32_FDCAN_BASE 0x4400e000
#define STM32_CRYP2_BASE 0x4c005000
#define STM32_CRYP1_BASE 0x54001000
#define STM32_GPU_BASE 0x59000000
#define STM32_DSI_BASE 0x5a000000
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 */
STM32_CRYP1_BASE, /* 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 */
STM32_FDCAN_BASE, /* 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 */
STM32_CRYP2_BASE, /* 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;
fdt_addr_t regs;
for (node = fdt_first_subnode(fdt, offset);
node >= 0;
node = fdt_next_subnode(fdt, node)) {
regs = fdtdec_get_addr(fdt, node, "reg");
if (addr == regs) {
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, int soc_node)
{
const u32 *array;
int array_size, i;
int 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));
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];
log_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))
log_notice("ETZPC: 0x%08x node disabled, decprot %d=%d\n",
addr, i, status);
}
return 0;
}
/* deactivate all the cpu except core 0 */
static void stm32_fdt_fixup_cpu(void *blob, char *name)
{
int off;
u32 reg;
off = fdt_path_offset(blob, "/cpus");
if (off < 0) {
log_warning("%s: couldn't find /cpus node\n", __func__);
return;
}
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
while (off != -FDT_ERR_NOTFOUND) {
reg = fdtdec_get_addr(blob, off, "reg");
if (reg != 0) {
fdt_del_node(blob, off);
log_notice("FDT: cpu %d node remove for %s\n",
reg, name);
/* after delete we can't trust the offsets anymore */
off = -1;
}
off = fdt_node_offset_by_prop_value(blob, off,
"device_type", "cpu", 4);
}
}
static void stm32_fdt_disable(void *fdt, int offset, u32 addr,
const char *string, const char *name)
{
if (fdt_disable_subnode_by_address(fdt, offset, addr))
log_notice("FDT: %s@%08x node disabled for %s\n",
string, addr, name);
}
static void stm32_fdt_disable_optee(void *blob)
{
int off, node;
/* Delete "optee" firmware node */
off = fdt_node_offset_by_compatible(blob, -1, "linaro,optee-tz");
if (off >= 0 && fdtdec_get_is_enabled(blob, off))
fdt_del_node(blob, off);
/* Delete "optee@..." reserved-memory node */
off = fdt_path_offset(blob, "/reserved-memory/");
if (off < 0)
return;
for (node = fdt_first_subnode(blob, off);
node >= 0;
node = fdt_next_subnode(blob, node)) {
if (strncmp(fdt_get_name(blob, node, NULL), "optee@", 6))
continue;
if (fdt_del_node(blob, node))
printf("Failed to remove optee reserved-memory node\n");
}
}
/*
* 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, struct bd_info *bd)
{
int ret = 0;
int soc;
u32 pkg, cpu;
char name[SOC_NAME_SIZE];
soc = fdt_path_offset(blob, "/soc");
if (soc < 0)
return soc;
if (CONFIG_IS_ENABLED(STM32_ETZPC)) {
ret = stm32_fdt_fixup_etzpc(blob, soc);
if (ret)
return ret;
}
/* MPUs Part Numbers and name*/
cpu = get_cpu_type();
get_soc_name(name);
switch (cpu) {
case CPU_STM32MP151Fxx:
case CPU_STM32MP151Dxx:
case CPU_STM32MP151Cxx:
case CPU_STM32MP151Axx:
stm32_fdt_fixup_cpu(blob, name);
/* after cpu delete we can't trust the soc offsets anymore */
soc = fdt_path_offset(blob, "/soc");
stm32_fdt_disable(blob, soc, STM32_FDCAN_BASE, "can", name);
/* fall through */
case CPU_STM32MP153Fxx:
case CPU_STM32MP153Dxx:
case CPU_STM32MP153Cxx:
case CPU_STM32MP153Axx:
stm32_fdt_disable(blob, soc, STM32_GPU_BASE, "gpu", name);
stm32_fdt_disable(blob, soc, STM32_DSI_BASE, "dsi", name);
break;
default:
break;
}
switch (cpu) {
case CPU_STM32MP157Dxx:
case CPU_STM32MP157Axx:
case CPU_STM32MP153Dxx:
case CPU_STM32MP153Axx:
case CPU_STM32MP151Dxx:
case CPU_STM32MP151Axx:
stm32_fdt_disable(blob, soc, STM32_CRYP1_BASE, "cryp", name);
stm32_fdt_disable(blob, soc, STM32_CRYP2_BASE, "cryp", name);
break;
default:
break;
}
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);
}
/*
* TEMP: remove OP-TEE nodes in kernel device tree
* copied from U-Boot device tree by optee_copy_fdt_nodes
* when OP-TEE is not detected (probe failed)
* these OP-TEE nodes are present in <board>-u-boot.dtsi
* under CONFIG_STM32MP15x_STM32IMAGE only for compatibility
* when FIP is not used by TF-A
*/
if (CONFIG_IS_ENABLED(STM32MP15x_STM32IMAGE) &&
CONFIG_IS_ENABLED(OPTEE) &&
!tee_find_device(NULL, NULL, NULL, NULL))
stm32_fdt_disable_optee(blob);
return ret;
}
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