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https://github.com/AsahiLinux/u-boot
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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
155 lines
3.3 KiB
C
155 lines
3.3 KiB
C
/*
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* (C) Copyright 2010-2011
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* NVIDIA Corporation <www.nvidia.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* Tegra AP (Application Processor) code */
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/gp_padctrl.h>
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#include <asm/arch-tegra/ap.h>
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#include <asm/arch-tegra/clock.h>
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#include <asm/arch-tegra/fuse.h>
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#include <asm/arch-tegra/pmc.h>
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#include <asm/arch-tegra/scu.h>
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#include <asm/arch-tegra/tegra.h>
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#include <asm/arch-tegra/warmboot.h>
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int tegra_get_chip(void)
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{
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int rev;
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struct apb_misc_gp_ctlr *gp =
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(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
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/*
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* This is undocumented, Chip ID is bits 15:8 of the register
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* APB_MISC + 0x804, and has value 0x20 for Tegra20, 0x30 for
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* Tegra30, and 0x35 for T114.
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*/
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rev = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >> HIDREV_CHIPID_SHIFT;
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debug("%s: CHIPID is 0x%02X\n", __func__, rev);
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return rev;
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}
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int tegra_get_sku_info(void)
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{
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int sku_id;
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struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;
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sku_id = readl(&fuse->sku_info) & 0xff;
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debug("%s: SKU info byte is 0x%02X\n", __func__, sku_id);
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return sku_id;
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}
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int tegra_get_chip_sku(void)
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{
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uint sku_id, chip_id;
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chip_id = tegra_get_chip();
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sku_id = tegra_get_sku_info();
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switch (chip_id) {
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case CHIPID_TEGRA20:
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switch (sku_id) {
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case SKU_ID_T20_7:
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case SKU_ID_T20:
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return TEGRA_SOC_T20;
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case SKU_ID_T25SE:
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case SKU_ID_AP25:
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case SKU_ID_T25:
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case SKU_ID_AP25E:
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case SKU_ID_T25E:
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return TEGRA_SOC_T25;
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}
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break;
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case CHIPID_TEGRA30:
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switch (sku_id) {
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case SKU_ID_T33:
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case SKU_ID_T30:
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return TEGRA_SOC_T30;
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}
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break;
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case CHIPID_TEGRA114:
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switch (sku_id) {
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case SKU_ID_T114_ENG:
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case SKU_ID_T114_1:
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return TEGRA_SOC_T114;
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}
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break;
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}
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/* unknown chip/sku id */
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printf("%s: ERROR: UNKNOWN CHIP/SKU ID COMBO (0x%02X/0x%02X)\n",
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__func__, chip_id, sku_id);
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return TEGRA_SOC_UNKNOWN;
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}
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static void enable_scu(void)
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{
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struct scu_ctlr *scu = (struct scu_ctlr *)NV_PA_ARM_PERIPHBASE;
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u32 reg;
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/* Only enable the SCU on T20/T25 */
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if (tegra_get_chip() != CHIPID_TEGRA20)
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return;
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/* If SCU already setup/enabled, return */
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if (readl(&scu->scu_ctrl) & SCU_CTRL_ENABLE)
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return;
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/* Invalidate all ways for all processors */
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writel(0xFFFF, &scu->scu_inv_all);
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/* Enable SCU - bit 0 */
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reg = readl(&scu->scu_ctrl);
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reg |= SCU_CTRL_ENABLE;
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writel(reg, &scu->scu_ctrl);
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}
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static u32 get_odmdata(void)
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{
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/*
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* ODMDATA is stored in the BCT in IRAM by the BootROM.
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* The BCT start and size are stored in the BIT in IRAM.
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* Read the data @ bct_start + (bct_size - 12). This works
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* on T20 and T30 BCTs, which are locked down. If this changes
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* in new chips (T114, etc.), we can revisit this algorithm.
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*/
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u32 bct_start, odmdata;
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bct_start = readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BCTPTR);
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odmdata = readl(bct_start + BCT_ODMDATA_OFFSET);
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return odmdata;
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}
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static void init_pmc_scratch(void)
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{
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struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
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u32 odmdata;
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int i;
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/* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */
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for (i = 0; i < 23; i++)
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writel(0, &pmc->pmc_scratch1+i);
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/* ODMDATA is for kernel use to determine RAM size, LP config, etc. */
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odmdata = get_odmdata();
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writel(odmdata, &pmc->pmc_scratch20);
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}
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void s_init(void)
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{
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/* Init PMC scratch memory */
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init_pmc_scratch();
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enable_scu();
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/* init the cache */
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config_cache();
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}
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