u-boot/arch/arm/mach-tegra/tegra20/warmboot.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010 - 2011
* NVIDIA Corporation <www.nvidia.com>
*/
#include <common.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <asm/arch/clock.h>
#include <asm/arch/emc.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/sdram_param.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/apb_misc.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/fuse.h>
#include <asm/arch-tegra/warmboot.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_TEGRA_CLOCK_SCALING
#error "You must enable CONFIG_TEGRA_CLOCK_SCALING to use CONFIG_TEGRA_LP0"
#endif
/*
* This is the place in SRAM where the SDRAM parameters are stored. There
* are 4 blocks, one for each RAM code
*/
#define SDRAM_PARAMS_BASE (NV_PA_BASE_SRAM + 0x188)
/* TODO: If we later add support for the Misc GP controller, refactor this */
union xm2cfga_reg {
struct {
u32 reserved0:2;
u32 hsm_en:1;
u32 reserved1:2;
u32 preemp_en:1;
u32 vref_en:1;
u32 reserved2:5;
u32 cal_drvdn:5;
u32 reserved3:3;
u32 cal_drvup:5;
u32 reserved4:3;
u32 cal_drvdn_slwr:2;
u32 cal_drvup_slwf:2;
};
u32 word;
};
union xm2cfgd_reg {
struct {
u32 reserved0:2;
u32 hsm_en:1;
u32 schmt_en:1;
u32 lpmd:2;
u32 vref_en:1;
u32 reserved1:5;
u32 cal_drvdn:5;
u32 reserved2:3;
u32 cal_drvup:5;
u32 reserved3:3;
u32 cal_drvdn_slwr:2;
u32 cal_drvup_slwf:2;
};
u32 word;
};
/*
* TODO: This register is not documented in the TRM yet. We could move this
* into the EMC and give it a proper interface, but not while it is
* undocumented.
*/
union fbio_spare_reg {
struct {
u32 reserved:24;
u32 cfg_wb0:8;
};
u32 word;
};
/* We pack the resume information into these unions for later */
union scratch2_reg {
struct {
u32 pllm_base_divm:5;
u32 pllm_base_divn:10;
u32 pllm_base_divp:3;
u32 pllm_misc_lfcon:4;
u32 pllm_misc_cpcon:4;
u32 gp_xm2cfga_padctrl_preemp:1;
u32 gp_xm2cfgd_padctrl_schmt:1;
u32 osc_ctrl_xobp:1;
u32 memory_type:3;
};
u32 word;
};
union scratch4_reg {
struct {
u32 emc_clock_divider:8;
u32 pllm_stable_time:8;
u32 pllx_stable_time:8;
u32 emc_fbio_spare_cfg_wb0:8;
};
u32 word;
};
union scratch24_reg {
struct {
u32 emc_auto_cal_wait:8;
u32 emc_pin_program_wait:8;
u32 warmboot_wait:8;
u32 reserved:8;
};
u32 word;
};
int warmboot_save_sdram_params(void)
{
u32 ram_code;
struct sdram_params sdram;
struct apb_misc_pp_ctlr *apb_misc =
(struct apb_misc_pp_ctlr *)NV_PA_APB_MISC_BASE;
struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
struct apb_misc_gp_ctlr *gp =
(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
struct emc_ctlr *emc = emc_get_controller(gd->fdt_blob);
union scratch2_reg scratch2;
union scratch4_reg scratch4;
union scratch24_reg scratch24;
union xm2cfga_reg xm2cfga;
union xm2cfgd_reg xm2cfgd;
union fbio_spare_reg fbio_spare;
/* get ram code that is used as index to array sdram_params in BCT */
ram_code = (readl(&apb_misc->strapping_opt_a) >>
STRAP_OPT_A_RAM_CODE_SHIFT) & 3;
memcpy(&sdram,
(char *)((struct sdram_params *)SDRAM_PARAMS_BASE + ram_code),
sizeof(sdram));
xm2cfga.word = readl(&gp->xm2cfga);
xm2cfgd.word = readl(&gp->xm2cfgd);
scratch2.word = 0;
scratch2.osc_ctrl_xobp = clock_get_osc_bypass();
/* Get the memory PLL settings */
{
u32 divm, divn, divp, cpcon, lfcon;
if (clock_ll_read_pll(CLOCK_ID_MEMORY, &divm, &divn, &divp,
&cpcon, &lfcon))
return -1;
scratch2.pllm_base_divm = divm;
scratch2.pllm_base_divn = divn;
scratch2.pllm_base_divp = divp;
scratch2.pllm_misc_cpcon = cpcon;
scratch2.pllm_misc_lfcon = lfcon;
}
scratch2.gp_xm2cfga_padctrl_preemp = xm2cfga.preemp_en;
scratch2.gp_xm2cfgd_padctrl_schmt = xm2cfgd.schmt_en;
scratch2.memory_type = sdram.memory_type;
writel(scratch2.word, &pmc->pmc_scratch2);
/* collect data from various sources for pmc_scratch4 */
fbio_spare.word = readl(&emc->fbio_spare);
scratch4.word = 0;
scratch4.emc_fbio_spare_cfg_wb0 = fbio_spare.cfg_wb0;
scratch4.emc_clock_divider = sdram.emc_clock_divider;
scratch4.pllm_stable_time = -1;
scratch4.pllx_stable_time = -1;
writel(scratch4.word, &pmc->pmc_scratch4);
/* collect various data from sdram for pmc_scratch24 */
scratch24.word = 0;
scratch24.emc_pin_program_wait = sdram.emc_pin_program_wait;
scratch24.emc_auto_cal_wait = sdram.emc_auto_cal_wait;
scratch24.warmboot_wait = sdram.warm_boot_wait;
writel(scratch24.word, &pmc->pmc_scratch24);
return 0;
}
static u32 get_major_version(void)
{
u32 major_id;
struct apb_misc_gp_ctlr *gp =
(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
major_id = (readl(&gp->hidrev) & HIDREV_MAJORPREV_MASK) >>
HIDREV_MAJORPREV_SHIFT;
return major_id;
}
static int is_production_mode_fuse_set(struct fuse_regs *fuse)
{
return readl(&fuse->production_mode);
}
static int is_odm_production_mode_fuse_set(struct fuse_regs *fuse)
{
return readl(&fuse->security_mode);
}
static int is_failure_analysis_mode(struct fuse_regs *fuse)
{
return readl(&fuse->fa);
}
static int ap20_is_odm_production_mode(void)
{
struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;
if (!is_failure_analysis_mode(fuse) &&
is_odm_production_mode_fuse_set(fuse))
return 1;
else
return 0;
}
static int ap20_is_production_mode(void)
{
struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;
if (get_major_version() == 0)
return 1;
if (!is_failure_analysis_mode(fuse) &&
is_production_mode_fuse_set(fuse) &&
!is_odm_production_mode_fuse_set(fuse))
return 1;
else
return 0;
}
static enum fuse_operating_mode fuse_get_operation_mode(void)
{
u32 chip_id;
struct apb_misc_gp_ctlr *gp =
(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
chip_id = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >>
HIDREV_CHIPID_SHIFT;
if (chip_id == CHIPID_TEGRA20) {
if (ap20_is_odm_production_mode()) {
printf("!! odm_production_mode is not supported !!\n");
return MODE_UNDEFINED;
} else
if (ap20_is_production_mode())
return MODE_PRODUCTION;
else
return MODE_UNDEFINED;
}
return MODE_UNDEFINED;
}
static void determine_crypto_options(int *is_encrypted, int *is_signed,
int *use_zero_key)
{
switch (fuse_get_operation_mode()) {
case MODE_PRODUCTION:
*is_encrypted = 0;
*is_signed = 1;
*use_zero_key = 1;
break;
case MODE_UNDEFINED:
default:
*is_encrypted = 0;
*is_signed = 0;
*use_zero_key = 0;
break;
}
}
static int sign_wb_code(u32 start, u32 length, int use_zero_key)
{
int err;
u8 *source; /* Pointer to source */
u8 *hash;
/* Calculate AES block parameters. */
source = (u8 *)(start + offsetof(struct wb_header, random_aes_block));
length -= offsetof(struct wb_header, random_aes_block);
hash = (u8 *)(start + offsetof(struct wb_header, hash));
err = sign_data_block(source, length, hash);
return err;
}
int warmboot_prepare_code(u32 seg_address, u32 seg_length)
{
int err = 0;
u32 length; /* length of the signed/encrypt code */
struct wb_header *dst_header; /* Pointer to dest WB header */
int is_encrypted; /* Segment is encrypted */
int is_signed; /* Segment is signed */
int use_zero_key; /* Use key of all zeros */
/* Determine crypto options. */
determine_crypto_options(&is_encrypted, &is_signed, &use_zero_key);
/* Get the actual code limits. */
length = roundup(((u32)wb_end - (u32)wb_start), 16);
/*
* The region specified by seg_address must be in SDRAM and must be
* nonzero in length.
*/
if (seg_length == 0 || seg_address < NV_PA_SDRAM_BASE ||
seg_address + seg_length >= NV_PA_SDRAM_BASE + gd->ram_size) {
err = -EFAULT;
goto fail;
}
/* Things must be 16-byte aligned. */
if ((seg_length & 0xF) || (seg_address & 0xF)) {
err = -EINVAL;
goto fail;
}
/* Will the code fit? (destination includes wb_header + wb code) */
if (seg_length < (length + sizeof(struct wb_header))) {
err = -EINVAL;
goto fail;
}
dst_header = (struct wb_header *)seg_address;
memset((char *)dst_header, 0, sizeof(struct wb_header));
/* Populate the random_aes_block as requested. */
{
u32 *aes_block = (u32 *)&(dst_header->random_aes_block);
u32 *end = (u32 *)(((u32)aes_block) +
sizeof(dst_header->random_aes_block));
do {
*aes_block++ = 0;
} while (aes_block < end);
}
/* Populate the header. */
dst_header->length_insecure = length + sizeof(struct wb_header);
dst_header->length_secure = length + sizeof(struct wb_header);
dst_header->destination = NV_WB_RUN_ADDRESS;
dst_header->entry_point = NV_WB_RUN_ADDRESS;
dst_header->code_length = length;
if (is_encrypted) {
printf("!!!! Encryption is not supported !!!!\n");
dst_header->length_insecure = 0;
err = -EACCES;
goto fail;
} else
/* copy the wb code directly following dst_header. */
memcpy((char *)(dst_header+1), (char *)wb_start, length);
if (is_signed)
err = sign_wb_code(seg_address, dst_header->length_insecure,
use_zero_key);
fail:
if (err)
printf("Warning: warmboot code copy failed (error=%d)\n", err);
return err;
}