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author | Anup Patel <apatel@ventanamicro.com> | 2022-05-13 06:57:23 +0300 |
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committer | Anup Patel <anup@brainfault.org> | 2022-05-13 06:57:23 +0300 |
commit | 9a7a677d5f7e3fbc9707683b5d07b7cb2b1aa499 (patch) | |
tree | 4b2371957b2e2c47265ba83327c976de7aaf984c /platform/generic/sifive_fu740.c | |
parent | a3a3c60b6615ca51dbab7a5d0893e98bc89a8411 (diff) | |
download | opensbi-9a7a677d5f7e3fbc9707683b5d07b7cb2b1aa499.tar.xz |
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>
Diffstat (limited to 'platform/generic/sifive_fu740.c')
-rw-r--r-- | platform/generic/sifive_fu740.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/platform/generic/sifive_fu740.c b/platform/generic/sifive_fu740.c deleted file mode 100644 index f595c04..0000000 --- a/platform/generic/sifive_fu740.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * SPDX-License-Identifier: BSD-2-Clause - * - * Copyright (c) 2021 SiFive - * Copyright (c) 2021 YADRO - * - * Authors: - * David Abdurachmanov <david.abdurachmanov@sifive.com> - * Nikita Shubin <n.shubin@yadro.com> - */ - -#include <platform_override.h> -#include <libfdt.h> -#include <sbi/sbi_error.h> -#include <sbi/sbi_hart.h> -#include <sbi/sbi_system.h> -#include <sbi/sbi_console.h> -#include <sbi_utils/fdt/fdt_helper.h> -#include <sbi_utils/fdt/fdt_fixup.h> -#include <sbi_utils/reset/fdt_reset.h> -#include <sbi_utils/i2c/fdt_i2c.h> - -#define DA9063_REG_PAGE_CON 0x00 -#define DA9063_REG_CONTROL_A 0x0e -#define DA9063_REG_CONTROL_D 0x11 -#define DA9063_REG_CONTROL_F 0x13 -#define DA9063_REG_DEVICE_ID 0x81 - -#define DA9063_CONTROL_A_M_POWER1_EN (1 << 6) -#define DA9063_CONTROL_A_M_POWER_EN (1 << 5) -#define DA9063_CONTROL_A_STANDBY (1 << 3) - -#define DA9063_CONTROL_D_TWDSCALE_MASK 0x07 - -#define DA9063_CONTROL_F_WAKEUP (1 << 2) -#define DA9063_CONTROL_F_SHUTDOWN (1 << 1) - -#define PMIC_CHIP_ID_DA9063 0x61 - -static struct { - struct i2c_adapter *adapter; - uint32_t reg; -} da9063; - -static int da9063_system_reset_check(u32 type, u32 reason) -{ - switch (type) { - case SBI_SRST_RESET_TYPE_SHUTDOWN: - return 1; - case SBI_SRST_RESET_TYPE_COLD_REBOOT: - case SBI_SRST_RESET_TYPE_WARM_REBOOT: - return 255; - } - - return 0; -} - -static inline int da9063_sanity_check(struct i2c_adapter *adap, uint32_t reg) -{ - uint8_t val; - int rc = i2c_adapter_reg_write(adap, reg, DA9063_REG_PAGE_CON, 0x02); - - if (rc) - return rc; - - /* check set page*/ - rc = i2c_adapter_reg_read(adap, reg, 0x0, &val); - if (rc) - return rc; - - if (val != 0x02) - return SBI_ENODEV; - - /* read and check device id */ - rc = i2c_adapter_reg_read(adap, reg, DA9063_REG_DEVICE_ID, &val); - if (rc) - return rc; - - if (val != PMIC_CHIP_ID_DA9063) - return SBI_ENODEV; - - return 0; -} - -static inline int da9063_stop_watchdog(struct i2c_adapter *adap, uint32_t reg) -{ - uint8_t val; - int rc = i2c_adapter_reg_write(adap, reg, - DA9063_REG_PAGE_CON, 0x00); - - if (rc) - return rc; - - rc = i2c_adapter_reg_read(adap, reg, DA9063_REG_CONTROL_D, &val); - if (rc) - return rc; - - if ((val & DA9063_CONTROL_D_TWDSCALE_MASK) == 0) - return 0; - - val &= ~DA9063_CONTROL_D_TWDSCALE_MASK; - - return i2c_adapter_reg_write(adap, reg, DA9063_REG_CONTROL_D, val); -} - -static inline int da9063_shutdown(struct i2c_adapter *adap, uint32_t reg) -{ - int rc = i2c_adapter_reg_write(adap, reg, - DA9063_REG_PAGE_CON, 0x00); - - if (rc) - return rc; - - return i2c_adapter_reg_write(adap, reg, - DA9063_REG_CONTROL_F, - DA9063_CONTROL_F_SHUTDOWN); -} - -static inline int da9063_reset(struct i2c_adapter *adap, uint32_t reg) -{ - int rc = i2c_adapter_reg_write(adap, reg, - DA9063_REG_PAGE_CON, 0x00); - - if (rc) - return rc; - - rc = i2c_adapter_reg_write(adap, reg, - DA9063_REG_CONTROL_F, - DA9063_CONTROL_F_WAKEUP); - if (rc) - return rc; - - return i2c_adapter_reg_write(adap, reg, - DA9063_REG_CONTROL_A, - DA9063_CONTROL_A_M_POWER1_EN | - DA9063_CONTROL_A_M_POWER_EN | - DA9063_CONTROL_A_STANDBY); -} - -static void da9063_system_reset(u32 type, u32 reason) -{ - struct i2c_adapter *adap = da9063.adapter; - uint32_t reg = da9063.reg; - int rc; - - if (adap) { - /* sanity check */ - rc = da9063_sanity_check(adap, reg); - if (rc) { - sbi_printf("%s: chip is not da9063 PMIC\n", __func__); - goto skip_reset; - } - - switch (type) { - case SBI_SRST_RESET_TYPE_SHUTDOWN: - da9063_shutdown(adap, reg); - break; - case SBI_SRST_RESET_TYPE_COLD_REBOOT: - case SBI_SRST_RESET_TYPE_WARM_REBOOT: - da9063_stop_watchdog(adap, reg); - da9063_reset(adap, reg); - break; - } - } - -skip_reset: - sbi_hart_hang(); -} - -static struct sbi_system_reset_device da9063_reset_i2c = { - .name = "da9063-reset", - .system_reset_check = da9063_system_reset_check, - .system_reset = da9063_system_reset -}; - -static int da9063_reset_init(void *fdt, int nodeoff, - const struct fdt_match *match) -{ - int rc, i2c_bus; - struct i2c_adapter *adapter; - uint64_t addr; - - /* we are dlg,da9063 node */ - rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL); - if (rc) - return rc; - - da9063.reg = addr; - - /* find i2c bus parent node */ - i2c_bus = fdt_parent_offset(fdt, nodeoff); - if (i2c_bus < 0) - return i2c_bus; - - /* i2c adapter get */ - rc = fdt_i2c_adapter_get(fdt, i2c_bus, &adapter); - if (rc) - return rc; - - da9063.adapter = adapter; - - sbi_system_reset_add_device(&da9063_reset_i2c); - - return 0; -} - -static const struct fdt_match da9063_reset_match[] = { - { .compatible = "dlg,da9063", .data = (void *)TRUE }, - { }, -}; - -struct fdt_reset fdt_reset_da9063 = { - .match_table = da9063_reset_match, - .init = da9063_reset_init, -}; - -static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match) -{ - /* - * Needed to address CIP-1200 errata on SiFive FU740 - * Title: Instruction TLB can fail to respect a non-global SFENCE - * Workaround: Flush the TLB using SFENCE.VMA x0, x0 - * See Errata_FU740-C000_20210205 from - * https://www.sifive.com/boards/hifive-unmatched - */ - return 0; -} - -static int sifive_fu740_final_init(bool cold_boot, - const struct fdt_match *match) -{ - int rc; - void *fdt = fdt_get_address(); - - if (cold_boot) { - rc = fdt_reset_driver_init(fdt, &fdt_reset_da9063); - if (rc) - sbi_printf("%s: failed to find da9063 for reset\n", - __func__); - } - - return 0; -} - -static const struct fdt_match sifive_fu740_match[] = { - { .compatible = "sifive,fu740" }, - { .compatible = "sifive,fu740-c000" }, - { .compatible = "sifive,hifive-unmatched-a00" }, - { }, -}; - -const struct platform_override sifive_fu740 = { - .match_table = sifive_fu740_match, - .tlbr_flush_limit = sifive_fu740_tlbr_flush_limit, - .final_init = sifive_fu740_final_init, -}; |