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/*
* (C) Copyright 2010-2011
* NVIDIA Corporation <www.nvidia.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* Tegra AP (Application Processor) code */
#include <common.h>
#include <asm/io.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/clock.h>
#include <asm/arch-tegra/fuse.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/scu.h>
#include <asm/arch-tegra/tegra.h>
#include <asm/arch-tegra/warmboot.h>
int tegra_get_chip(void)
{
int rev;
struct apb_misc_gp_ctlr *gp =
(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
/*
* This is undocumented, Chip ID is bits 15:8 of the register
* APB_MISC + 0x804, and has value 0x20 for Tegra20, 0x30 for
* Tegra30, and 0x35 for T114.
*/
rev = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >> HIDREV_CHIPID_SHIFT;
debug("%s: CHIPID is 0x%02X\n", __func__, rev);
return rev;
}
int tegra_get_sku_info(void)
{
int sku_id;
struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;
sku_id = readl(&fuse->sku_info) & 0xff;
debug("%s: SKU info byte is 0x%02X\n", __func__, sku_id);
return sku_id;
}
int tegra_get_chip_sku(void)
{
uint sku_id, chip_id;
chip_id = tegra_get_chip();
sku_id = tegra_get_sku_info();
switch (chip_id) {
case CHIPID_TEGRA20:
switch (sku_id) {
case SKU_ID_T20_7:
case SKU_ID_T20:
return TEGRA_SOC_T20;
case SKU_ID_T25SE:
case SKU_ID_AP25:
case SKU_ID_T25:
case SKU_ID_AP25E:
case SKU_ID_T25E:
return TEGRA_SOC_T25;
}
break;
case CHIPID_TEGRA30:
switch (sku_id) {
case SKU_ID_T33:
case SKU_ID_T30:
return TEGRA_SOC_T30;
}
break;
case CHIPID_TEGRA114:
switch (sku_id) {
case SKU_ID_T114_ENG:
case SKU_ID_T114_1:
return TEGRA_SOC_T114;
}
break;
}
/* unknown chip/sku id */
printf("%s: ERROR: UNKNOWN CHIP/SKU ID COMBO (0x%02X/0x%02X)\n",
__func__, chip_id, sku_id);
return TEGRA_SOC_UNKNOWN;
}
static void enable_scu(void)
{
struct scu_ctlr *scu = (struct scu_ctlr *)NV_PA_ARM_PERIPHBASE;
u32 reg;
/* Only enable the SCU on T20/T25 */
if (tegra_get_chip() != CHIPID_TEGRA20)
return;
/* If SCU already setup/enabled, return */
if (readl(&scu->scu_ctrl) & SCU_CTRL_ENABLE)
return;
/* Invalidate all ways for all processors */
writel(0xFFFF, &scu->scu_inv_all);
/* Enable SCU - bit 0 */
reg = readl(&scu->scu_ctrl);
reg |= SCU_CTRL_ENABLE;
writel(reg, &scu->scu_ctrl);
}
static u32 get_odmdata(void)
{
/*
* ODMDATA is stored in the BCT in IRAM by the BootROM.
* The BCT start and size are stored in the BIT in IRAM.
* Read the data @ bct_start + (bct_size - 12). This works
* on T20 and T30 BCTs, which are locked down. If this changes
* in new chips (T114, etc.), we can revisit this algorithm.
*/
u32 bct_start, odmdata;
bct_start = readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BCTPTR);
odmdata = readl(bct_start + BCT_ODMDATA_OFFSET);
return odmdata;
}
static void init_pmc_scratch(void)
{
struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
u32 odmdata;
int i;
/* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */
for (i = 0; i < 23; i++)
writel(0, &pmc->pmc_scratch1+i);
/* ODMDATA is for kernel use to determine RAM size, LP config, etc. */
odmdata = get_odmdata();
writel(odmdata, &pmc->pmc_scratch20);
}
void s_init(void)
{
/* Init PMC scratch memory */
init_pmc_scratch();
enable_scu();
/* init the cache */
config_cache();
}
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