u-boot/arch/arm/mach-imx/mx7/soc.c
Jun Nie bc7c9ed33c imx: mx7: Skip secure init in arch_cpu_init
Skip secure related initialization in arch_cpu_init if low level
init is skipped.  Because these should be done in early stage
firmware, such as ARM trusted firmware.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
2019-06-11 10:42:48 +02:00

390 lines
9.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/dma.h>
#include <asm/mach-imx/hab.h>
#include <asm/mach-imx/rdc-sema.h>
#include <asm/arch/imx-rdc.h>
#include <asm/arch/crm_regs.h>
#include <dm.h>
#include <imx_thermal.h>
#include <fsl_sec.h>
#include <asm/setup.h>
#define IOMUXC_GPR1 0x4
#define BM_IOMUXC_GPR1_IRQ 0x1000
#define GPC_LPCR_A7_BSC 0x0
#define GPC_LPCR_M4 0x8
#define GPC_SLPCR 0x14
#define GPC_PGC_ACK_SEL_A7 0x24
#define GPC_IMR1_CORE0 0x30
#define GPC_IMR1_CORE1 0x40
#define GPC_IMR1_M4 0x50
#define GPC_PGC_CPU_MAPPING 0xec
#define GPC_PGC_C0_PUPSCR 0x804
#define GPC_PGC_SCU_TIMING 0x890
#define GPC_PGC_C1_PUPSCR 0x844
#define BM_LPCR_A7_BSC_IRQ_SRC_A7_WAKEUP 0x70000000
#define BM_LPCR_A7_BSC_CPU_CLK_ON_LPM 0x4000
#define BM_LPCR_M4_MASK_DSM_TRIGGER 0x80000000
#define BM_SLPCR_EN_DSM 0x80000000
#define BM_SLPCR_RBC_EN 0x40000000
#define BM_SLPCR_REG_BYPASS_COUNT 0x3f000000
#define BM_SLPCR_VSTBY 0x4
#define BM_SLPCR_SBYOS 0x2
#define BM_SLPCR_BYPASS_PMIC_READY 0x1
#define BM_SLPCR_EN_A7_FASTWUP_WAIT_MODE 0x10000
#define BM_GPC_PGC_ACK_SEL_A7_DUMMY_PUP_ACK 0x80000000
#define BM_GPC_PGC_ACK_SEL_A7_DUMMY_PDN_ACK 0x8000
#define BM_GPC_PGC_CORE_PUPSCR 0x7fff80
#if defined(CONFIG_IMX_THERMAL)
static const struct imx_thermal_plat imx7_thermal_plat = {
.regs = (void *)ANATOP_BASE_ADDR,
.fuse_bank = 3,
.fuse_word = 3,
};
U_BOOT_DEVICE(imx7_thermal) = {
.name = "imx_thermal",
.platdata = &imx7_thermal_plat,
};
#endif
#if CONFIG_IS_ENABLED(IMX_RDC)
/*
* In current design, if any peripheral was assigned to both A7 and M4,
* it will receive ipg_stop or ipg_wait when any of the 2 platforms enter
* low power mode. So M4 sleep will cause some peripherals fail to work
* at A7 core side. At default, all resources are in domain 0 - 3.
*
* There are 26 peripherals impacted by this IC issue:
* SIM2(sim2/emvsim2)
* SIM1(sim1/emvsim1)
* UART1/UART2/UART3/UART4/UART5/UART6/UART7
* SAI1/SAI2/SAI3
* WDOG1/WDOG2/WDOG3/WDOG4
* GPT1/GPT2/GPT3/GPT4
* PWM1/PWM2/PWM3/PWM4
* ENET1/ENET2
* Software Workaround:
* Here we setup some resources to domain 0 where M4 codes will move
* the M4 out of this domain. Then M4 is not able to access them any longer.
* This is a workaround for ic issue. So the peripherals are not shared
* by them. This way requires the uboot implemented the RDC driver and
* set the 26 IPs above to domain 0 only. M4 code will assign resource
* to its own domain, if it want to use the resource.
*/
static rdc_peri_cfg_t const resources[] = {
(RDC_PER_SIM1 | RDC_DOMAIN(0)),
(RDC_PER_SIM2 | RDC_DOMAIN(0)),
(RDC_PER_UART1 | RDC_DOMAIN(0)),
(RDC_PER_UART2 | RDC_DOMAIN(0)),
(RDC_PER_UART3 | RDC_DOMAIN(0)),
(RDC_PER_UART4 | RDC_DOMAIN(0)),
(RDC_PER_UART5 | RDC_DOMAIN(0)),
(RDC_PER_UART6 | RDC_DOMAIN(0)),
(RDC_PER_UART7 | RDC_DOMAIN(0)),
(RDC_PER_SAI1 | RDC_DOMAIN(0)),
(RDC_PER_SAI2 | RDC_DOMAIN(0)),
(RDC_PER_SAI3 | RDC_DOMAIN(0)),
(RDC_PER_WDOG1 | RDC_DOMAIN(0)),
(RDC_PER_WDOG2 | RDC_DOMAIN(0)),
(RDC_PER_WDOG3 | RDC_DOMAIN(0)),
(RDC_PER_WDOG4 | RDC_DOMAIN(0)),
(RDC_PER_GPT1 | RDC_DOMAIN(0)),
(RDC_PER_GPT2 | RDC_DOMAIN(0)),
(RDC_PER_GPT3 | RDC_DOMAIN(0)),
(RDC_PER_GPT4 | RDC_DOMAIN(0)),
(RDC_PER_PWM1 | RDC_DOMAIN(0)),
(RDC_PER_PWM2 | RDC_DOMAIN(0)),
(RDC_PER_PWM3 | RDC_DOMAIN(0)),
(RDC_PER_PWM4 | RDC_DOMAIN(0)),
(RDC_PER_ENET1 | RDC_DOMAIN(0)),
(RDC_PER_ENET2 | RDC_DOMAIN(0)),
};
static void isolate_resource(void)
{
imx_rdc_setup_peripherals(resources, ARRAY_SIZE(resources));
}
#endif
#if defined(CONFIG_SECURE_BOOT)
struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
.bank = 1,
.word = 3,
};
#endif
static bool is_mx7d(void)
{
struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
struct fuse_bank *bank = &ocotp->bank[1];
struct fuse_bank1_regs *fuse =
(struct fuse_bank1_regs *)bank->fuse_regs;
int val;
val = readl(&fuse->tester4);
if (val & 1)
return false;
else
return true;
}
u32 get_cpu_rev(void)
{
struct mxc_ccm_anatop_reg *ccm_anatop = (struct mxc_ccm_anatop_reg *)
ANATOP_BASE_ADDR;
u32 reg = readl(&ccm_anatop->digprog);
u32 type = (reg >> 16) & 0xff;
if (!is_mx7d())
type = MXC_CPU_MX7S;
reg &= 0xff;
return (type << 12) | reg;
}
#ifdef CONFIG_REVISION_TAG
u32 __weak get_board_rev(void)
{
return get_cpu_rev();
}
#endif
static void imx_enet_mdio_fixup(void)
{
struct iomuxc_gpr_base_regs *gpr_regs =
(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
/*
* The management data input/output (MDIO) requires open-drain,
* i.MX7D TO1.0 ENET MDIO pin has no open drain, but TO1.1 supports
* this feature. So to TO1.1, need to enable open drain by setting
* bits GPR0[8:7].
*/
if (soc_rev() >= CHIP_REV_1_1) {
setbits_le32(&gpr_regs->gpr[0],
IOMUXC_GPR_GPR0_ENET_MDIO_OPEN_DRAIN_MASK);
}
}
static void init_cpu_basic(void)
{
imx_enet_mdio_fixup();
#ifdef CONFIG_APBH_DMA
/* Start APBH DMA */
mxs_dma_init();
#endif
}
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
/* enable all periherial can be accessed in nosec mode */
static void init_csu(void)
{
int i = 0;
for (i = 0; i < CSU_NUM_REGS; i++)
writel(CSU_INIT_SEC_LEVEL0, CSU_IPS_BASE_ADDR + i * 4);
}
static void imx_gpcv2_init(void)
{
u32 val, i;
/*
* Force IOMUXC irq pending, so that the interrupt to GPC can be
* used to deassert dsm_request signal when the signal gets
* asserted unexpectedly.
*/
val = readl(IOMUXC_GPR_BASE_ADDR + IOMUXC_GPR1);
val |= BM_IOMUXC_GPR1_IRQ;
writel(val, IOMUXC_GPR_BASE_ADDR + IOMUXC_GPR1);
/* Initially mask all interrupts */
for (i = 0; i < 4; i++) {
writel(~0, GPC_IPS_BASE_ADDR + GPC_IMR1_CORE0 + i * 4);
writel(~0, GPC_IPS_BASE_ADDR + GPC_IMR1_CORE1 + i * 4);
writel(~0, GPC_IPS_BASE_ADDR + GPC_IMR1_M4 + i * 4);
}
/* set SCU timing */
writel((0x59 << 10) | 0x5B | (0x2 << 20),
GPC_IPS_BASE_ADDR + GPC_PGC_SCU_TIMING);
/* only external IRQs to wake up LPM and core 0/1 */
val = readl(GPC_IPS_BASE_ADDR + GPC_LPCR_A7_BSC);
val |= BM_LPCR_A7_BSC_IRQ_SRC_A7_WAKEUP;
writel(val, GPC_IPS_BASE_ADDR + GPC_LPCR_A7_BSC);
/* set C0 power up timming per design requirement */
val = readl(GPC_IPS_BASE_ADDR + GPC_PGC_C0_PUPSCR);
val &= ~BM_GPC_PGC_CORE_PUPSCR;
val |= (0x1A << 7);
writel(val, GPC_IPS_BASE_ADDR + GPC_PGC_C0_PUPSCR);
/* set C1 power up timming per design requirement */
val = readl(GPC_IPS_BASE_ADDR + GPC_PGC_C1_PUPSCR);
val &= ~BM_GPC_PGC_CORE_PUPSCR;
val |= (0x1A << 7);
writel(val, GPC_IPS_BASE_ADDR + GPC_PGC_C1_PUPSCR);
/* dummy ack for time slot by default */
writel(BM_GPC_PGC_ACK_SEL_A7_DUMMY_PUP_ACK |
BM_GPC_PGC_ACK_SEL_A7_DUMMY_PDN_ACK,
GPC_IPS_BASE_ADDR + GPC_PGC_ACK_SEL_A7);
/* mask M4 DSM trigger */
writel(readl(GPC_IPS_BASE_ADDR + GPC_LPCR_M4) |
BM_LPCR_M4_MASK_DSM_TRIGGER,
GPC_IPS_BASE_ADDR + GPC_LPCR_M4);
/* set mega/fast mix in A7 domain */
writel(0x1, GPC_IPS_BASE_ADDR + GPC_PGC_CPU_MAPPING);
/* DSM related settings */
val = readl(GPC_IPS_BASE_ADDR + GPC_SLPCR);
val &= ~(BM_SLPCR_EN_DSM | BM_SLPCR_VSTBY | BM_SLPCR_RBC_EN |
BM_SLPCR_SBYOS | BM_SLPCR_BYPASS_PMIC_READY |
BM_SLPCR_REG_BYPASS_COUNT);
val |= BM_SLPCR_EN_A7_FASTWUP_WAIT_MODE;
writel(val, GPC_IPS_BASE_ADDR + GPC_SLPCR);
/*
* disabling RBC need to delay at least 2 cycles of CKIL(32K)
* due to hardware design requirement, which is
* ~61us, here we use 65us for safe
*/
udelay(65);
}
int arch_cpu_init(void)
{
init_aips();
init_csu();
/* Disable PDE bit of WMCR register */
imx_wdog_disable_powerdown();
init_cpu_basic();
#if CONFIG_IS_ENABLED(IMX_RDC)
isolate_resource();
#endif
init_snvs();
imx_gpcv2_init();
return 0;
}
#else
int arch_cpu_init(void)
{
init_cpu_basic();
return 0;
}
#endif
#ifdef CONFIG_ARCH_MISC_INIT
int arch_misc_init(void)
{
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
if (is_mx7d())
env_set("soc", "imx7d");
else
env_set("soc", "imx7s");
#endif
#ifdef CONFIG_FSL_CAAM
sec_init();
#endif
return 0;
}
#endif
#ifdef CONFIG_SERIAL_TAG
/*
* OCOTP_TESTER
* i.MX 7Solo Applications Processor Reference Manual, Rev. 0.1, 08/2016
* OCOTP_TESTER describes a unique ID based on silicon wafer
* and die X/Y position
*
* OCOTOP_TESTER offset 0x410
* 31:0 fuse 0
* FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
*
* OCOTP_TESTER1 offset 0x420
* 31:24 fuse 1
* The X-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
* 23:16 fuse 1
* The Y-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
* 15:11 fuse 1
* The wafer number of the wafer on which the device was fabricated/SJC
* CHALLENGE/ Unique ID
* 10:0 fuse 1
* FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
*/
void get_board_serial(struct tag_serialnr *serialnr)
{
struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
struct fuse_bank *bank = &ocotp->bank[0];
struct fuse_bank0_regs *fuse =
(struct fuse_bank0_regs *)bank->fuse_regs;
serialnr->low = fuse->tester0;
serialnr->high = fuse->tester1;
}
#endif
void set_wdog_reset(struct wdog_regs *wdog)
{
u32 reg = readw(&wdog->wcr);
/*
* Output WDOG_B signal to reset external pmic or POR_B decided by
* the board desgin. Without external reset, the peripherals/DDR/
* PMIC are not reset, that may cause system working abnormal.
*/
reg = readw(&wdog->wcr);
reg |= 1 << 3;
/*
* WDZST bit is write-once only bit. Align this bit in kernel,
* otherwise kernel code will have no chance to set this bit.
*/
reg |= 1 << 0;
writew(reg, &wdog->wcr);
}
void s_init(void)
{
/* clock configuration. */
clock_init();
return;
}
void reset_misc(void)
{
#ifndef CONFIG_SPL_BUILD
#ifdef CONFIG_VIDEO_MXS
lcdif_power_down();
#endif
#endif
}