forked from Mirrors/opensbi
platform: generic: Move Sifive platform overrides into own directory
Let us move SiFive platform overrides for FU540 and FU740 into a separate directory so better maintainability. Other SoC vendors can also create their own directory under platform/generic. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
256
platform/generic/sifive/fu740.c
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256
platform/generic/sifive/fu740.c
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/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 SiFive
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* Copyright (c) 2021 YADRO
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*
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* Authors:
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* David Abdurachmanov <david.abdurachmanov@sifive.com>
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* Nikita Shubin <n.shubin@yadro.com>
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*/
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#include <platform_override.h>
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#include <libfdt.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_hart.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_console.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/fdt/fdt_fixup.h>
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#include <sbi_utils/reset/fdt_reset.h>
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#include <sbi_utils/i2c/fdt_i2c.h>
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#define DA9063_REG_PAGE_CON 0x00
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#define DA9063_REG_CONTROL_A 0x0e
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#define DA9063_REG_CONTROL_D 0x11
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#define DA9063_REG_CONTROL_F 0x13
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#define DA9063_REG_DEVICE_ID 0x81
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#define DA9063_CONTROL_A_M_POWER1_EN (1 << 6)
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#define DA9063_CONTROL_A_M_POWER_EN (1 << 5)
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#define DA9063_CONTROL_A_STANDBY (1 << 3)
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#define DA9063_CONTROL_D_TWDSCALE_MASK 0x07
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#define DA9063_CONTROL_F_WAKEUP (1 << 2)
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#define DA9063_CONTROL_F_SHUTDOWN (1 << 1)
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#define PMIC_CHIP_ID_DA9063 0x61
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static struct {
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struct i2c_adapter *adapter;
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uint32_t reg;
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} da9063;
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static int da9063_system_reset_check(u32 type, u32 reason)
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{
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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return 1;
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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return 255;
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}
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return 0;
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}
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static inline int da9063_sanity_check(struct i2c_adapter *adap, uint32_t reg)
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{
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uint8_t val;
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int rc = i2c_adapter_reg_write(adap, reg, DA9063_REG_PAGE_CON, 0x02);
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if (rc)
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return rc;
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/* check set page*/
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rc = i2c_adapter_reg_read(adap, reg, 0x0, &val);
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if (rc)
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return rc;
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if (val != 0x02)
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return SBI_ENODEV;
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/* read and check device id */
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rc = i2c_adapter_reg_read(adap, reg, DA9063_REG_DEVICE_ID, &val);
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if (rc)
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return rc;
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if (val != PMIC_CHIP_ID_DA9063)
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return SBI_ENODEV;
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return 0;
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}
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static inline int da9063_stop_watchdog(struct i2c_adapter *adap, uint32_t reg)
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{
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uint8_t val;
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int rc = i2c_adapter_reg_write(adap, reg,
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DA9063_REG_PAGE_CON, 0x00);
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if (rc)
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return rc;
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rc = i2c_adapter_reg_read(adap, reg, DA9063_REG_CONTROL_D, &val);
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if (rc)
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return rc;
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if ((val & DA9063_CONTROL_D_TWDSCALE_MASK) == 0)
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return 0;
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val &= ~DA9063_CONTROL_D_TWDSCALE_MASK;
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return i2c_adapter_reg_write(adap, reg, DA9063_REG_CONTROL_D, val);
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}
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static inline int da9063_shutdown(struct i2c_adapter *adap, uint32_t reg)
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{
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int rc = i2c_adapter_reg_write(adap, reg,
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DA9063_REG_PAGE_CON, 0x00);
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if (rc)
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return rc;
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return i2c_adapter_reg_write(adap, reg,
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DA9063_REG_CONTROL_F,
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DA9063_CONTROL_F_SHUTDOWN);
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}
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static inline int da9063_reset(struct i2c_adapter *adap, uint32_t reg)
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{
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int rc = i2c_adapter_reg_write(adap, reg,
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DA9063_REG_PAGE_CON, 0x00);
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if (rc)
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return rc;
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rc = i2c_adapter_reg_write(adap, reg,
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DA9063_REG_CONTROL_F,
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DA9063_CONTROL_F_WAKEUP);
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if (rc)
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return rc;
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return i2c_adapter_reg_write(adap, reg,
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DA9063_REG_CONTROL_A,
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DA9063_CONTROL_A_M_POWER1_EN |
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DA9063_CONTROL_A_M_POWER_EN |
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DA9063_CONTROL_A_STANDBY);
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}
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static void da9063_system_reset(u32 type, u32 reason)
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{
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struct i2c_adapter *adap = da9063.adapter;
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uint32_t reg = da9063.reg;
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int rc;
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if (adap) {
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/* sanity check */
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rc = da9063_sanity_check(adap, reg);
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if (rc) {
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sbi_printf("%s: chip is not da9063 PMIC\n", __func__);
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goto skip_reset;
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}
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switch (type) {
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case SBI_SRST_RESET_TYPE_SHUTDOWN:
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da9063_shutdown(adap, reg);
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break;
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case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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da9063_stop_watchdog(adap, reg);
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da9063_reset(adap, reg);
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break;
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}
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}
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skip_reset:
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sbi_hart_hang();
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}
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static struct sbi_system_reset_device da9063_reset_i2c = {
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.name = "da9063-reset",
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.system_reset_check = da9063_system_reset_check,
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.system_reset = da9063_system_reset
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};
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static int da9063_reset_init(void *fdt, int nodeoff,
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const struct fdt_match *match)
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{
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int rc, i2c_bus;
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struct i2c_adapter *adapter;
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uint64_t addr;
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/* we are dlg,da9063 node */
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rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL);
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if (rc)
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return rc;
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da9063.reg = addr;
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/* find i2c bus parent node */
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i2c_bus = fdt_parent_offset(fdt, nodeoff);
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if (i2c_bus < 0)
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return i2c_bus;
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/* i2c adapter get */
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rc = fdt_i2c_adapter_get(fdt, i2c_bus, &adapter);
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if (rc)
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return rc;
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da9063.adapter = adapter;
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sbi_system_reset_add_device(&da9063_reset_i2c);
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return 0;
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}
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static const struct fdt_match da9063_reset_match[] = {
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{ .compatible = "dlg,da9063", .data = (void *)TRUE },
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{ },
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};
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struct fdt_reset fdt_reset_da9063 = {
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.match_table = da9063_reset_match,
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.init = da9063_reset_init,
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};
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static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match)
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{
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/*
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* Needed to address CIP-1200 errata on SiFive FU740
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* Title: Instruction TLB can fail to respect a non-global SFENCE
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* Workaround: Flush the TLB using SFENCE.VMA x0, x0
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* See Errata_FU740-C000_20210205 from
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* https://www.sifive.com/boards/hifive-unmatched
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*/
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return 0;
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}
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static int sifive_fu740_final_init(bool cold_boot,
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const struct fdt_match *match)
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{
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int rc;
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void *fdt = fdt_get_address();
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if (cold_boot) {
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rc = fdt_reset_driver_init(fdt, &fdt_reset_da9063);
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if (rc)
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sbi_printf("%s: failed to find da9063 for reset\n",
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__func__);
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}
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return 0;
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}
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static const struct fdt_match sifive_fu740_match[] = {
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{ .compatible = "sifive,fu740" },
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{ .compatible = "sifive,fu740-c000" },
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{ .compatible = "sifive,hifive-unmatched-a00" },
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{ },
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};
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const struct platform_override sifive_fu740 = {
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.match_table = sifive_fu740_match,
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.tlbr_flush_limit = sifive_fu740_tlbr_flush_limit,
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.final_init = sifive_fu740_final_init,
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};
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