diff options
Diffstat (limited to '')
| -rw-r--r-- | plat/mediatek/mt8195/drivers/dfd/plat_dfd.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c new file mode 100644 index 0000000..c083318 --- /dev/null +++ b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c @@ -0,0 +1,156 @@ +/* + * Copyright (c) 2021, MediaTek Inc. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ +#include <arch_helpers.h> +#include <common/debug.h> +#include <lib/mmio.h> +#include <mtk_sip_svc.h> +#include <plat_dfd.h> + +static bool dfd_enabled; +static uint64_t dfd_base_addr; +static uint64_t dfd_chain_length; +static uint64_t dfd_cache_dump; + +static void dfd_setup(uint64_t base_addr, uint64_t chain_length, + uint64_t cache_dump) +{ + mmio_write_32(MTK_WDT_LATCH_CTL2, MTK_WDT_LATCH_CTL2_VAL); + mmio_write_32(MTK_WDT_INTERVAL, MTK_WDT_INTERVAL_VAL); + mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_VAL); + mmio_write_32(MTK_DRM_LATCH_CTL1, MTK_DRM_LATCH_CTL1_VAL); + + /* Bit[2] = 0 (default=1), disable dfd apb bus protect_en */ + mmio_clrbits_32(DFD_O_INTRF_MCU_PWR_CTL_MASK, 0x1 << 2); + + /* Bit[0] : enable?mcusys_vproc?external_off?dfd?trigger -> 1 */ + mmio_setbits_32(DFD_V50_GROUP_0_63_DIFF, 0x1); + + /* bit[0]: rg_rw_dfd_internal_dump_en -> 1 */ + /* bit[2]: rg_rw_dfd_clock_stop_en -> 1 */ + sync_writel(DFD_INTERNAL_CTL, 0x5); + + /* bit[13]: xreset_b_update_disable */ + mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 13); + + /* + * bit[10:3]: DFD trigger selection mask + * bit[3]: rg_rw_dfd_trigger_sel[0] = 1(enable wdt trigger) + * bit[4]: rg_rw_dfd_trigger_sel[1] = 1(enable HW trigger) + * bit[5]: rg_rw_dfd_trigger_sel[2] = 1(enable SW trigger) + * bit[6]: rg_rw_dfd_trigger_sel[3] = 1(enable SW non-security trigger) + * bit[7]: rg_rw_dfd_trigger_sel[4] = 1(enable timer trigger) + */ + mmio_setbits_32(DFD_INTERNAL_CTL, 0x1F << 3); + + /* + * bit[9] : rg_rw_dfd_trigger_sel[6] = 1(cpu_eb_sw_dfd_trigger) + * bit[10] : rg_rw_dfd_trigger_sel[7] = 1(cpu_eb_wdt_dfd_trigger) + */ + mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 9); + + /* bit[20:19]: rg_dfd_armpll_div_mux_sel switch to PLL2 for DFD */ + mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 19); + + /* + * bit[0]: rg_rw_dfd_auto_power_on = 1 + * bit[2:1]: rg_rw_dfd_auto_power_on_dely = 1(10us) + * bit[4:2]: rg_rw_dfd_power_on_wait_time = 1(20us) + */ + mmio_write_32(DFD_INTERNAL_PWR_ON, 0xB); + + /* longest scan chain length */ + mmio_write_32(DFD_CHAIN_LENGTH0, chain_length); + + /* bit[1:0]: rg_rw_dfd_shift_clock_ratio */ + mmio_write_32(DFD_INTERNAL_SHIFT_CLK_RATIO, 0x0); + + /* rg_dfd_test_so_over_64 */ + mmio_write_32(DFD_INTERNAL_TEST_SO_OVER_64, 0x1); + + /* DFD3.0 */ + mmio_write_32(DFD_TEST_SI_0, 0x0); + mmio_write_32(DFD_TEST_SI_1, 0x0); + mmio_write_32(DFD_TEST_SI_2, 0x0); + mmio_write_32(DFD_TEST_SI_3, 0x0); + + /* for iLDO feature */ + sync_writel(DFD_POWER_CTL, 0xF9); + + /* read offset */ + sync_writel(DFD_READ_ADDR, DFD_READ_ADDR_VAL); + + /* for DFD-3.0 setup */ + sync_writel(DFD_V30_CTL, 0xD); + + /* set base address */ + mmio_write_32(DFD_O_SET_BASEADDR_REG, base_addr >> 24); + mmio_write_32(DFD_O_REG_0, 0); + + /* setup global variables for suspend and resume */ + dfd_enabled = true; + dfd_base_addr = base_addr; + dfd_chain_length = chain_length; + dfd_cache_dump = cache_dump; + + if ((cache_dump & DFD_CACHE_DUMP_ENABLE) != 0UL) { + mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_CACHE_VAL); + sync_writel(DFD_V35_ENABLE, 0x1); + sync_writel(DFD_V35_TAP_NUMBER, 0xB); + sync_writel(DFD_V35_TAP_EN, DFD_V35_TAP_EN_VAL); + sync_writel(DFD_V35_SEQ0_0, DFD_V35_SEQ0_0_VAL); + + /* Cache dump only mode */ + sync_writel(DFD_V35_CTL, 0x1); + mmio_write_32(DFD_INTERNAL_NUM_OF_TEST_SO_GROUP, 0xF); + mmio_write_32(DFD_CHAIN_LENGTH0, DFD_CHAIN_LENGTH_VAL); + mmio_write_32(DFD_CHAIN_LENGTH1, DFD_CHAIN_LENGTH_VAL); + mmio_write_32(DFD_CHAIN_LENGTH2, DFD_CHAIN_LENGTH_VAL); + mmio_write_32(DFD_CHAIN_LENGTH3, DFD_CHAIN_LENGTH_VAL); + + if ((cache_dump & DFD_PARITY_ERR_TRIGGER) != 0UL) { + sync_writel(DFD_HW_TRIGGER_MASK, 0xC); + mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 4); + } + } + dsbsy(); +} + +void dfd_resume(void) +{ + if (dfd_enabled == true) { + dfd_setup(dfd_base_addr, dfd_chain_length, dfd_cache_dump); + } +} + +uint64_t dfd_smc_dispatcher(uint64_t arg0, uint64_t arg1, + uint64_t arg2, uint64_t arg3) +{ + uint64_t ret = 0L; + + switch (arg0) { + case PLAT_MTK_DFD_SETUP_MAGIC: + INFO("[%s] DFD setup call from kernel\n", __func__); + dfd_setup(arg1, arg2, arg3); + break; + case PLAT_MTK_DFD_READ_MAGIC: + /* only allow to access DFD register base + 0x200 */ + if (arg1 <= 0x200) { + ret = mmio_read_32(MISC1_CFG_BASE + arg1); + } + break; + case PLAT_MTK_DFD_WRITE_MAGIC: + /* only allow to access DFD register base + 0x200 */ + if (arg1 <= 0x200) { + sync_writel(MISC1_CFG_BASE + arg1, arg2); + } + break; + default: + ret = MTK_SIP_E_INVALID_PARAM; + break; + } + + return ret; +} |