| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/mmio.h> |
| #include <soc/pmic_wrap.h> |
| #include <timer.h> |
| |
| u32 wait_for_state_idle(u32 timeout_us, void *wacs_register, |
| void *wacs_vldclr_register, u32 *read_reg) |
| { |
| u32 reg_rdata; |
| |
| struct stopwatch sw; |
| |
| stopwatch_init_usecs_expire(&sw, timeout_us); |
| do { |
| reg_rdata = read32((wacs_register)); |
| /* if last read command timeout,clear vldclr bit |
| read command state machine:FSM_REQ-->wfdle-->WFVLDCLR; |
| write:FSM_REQ-->idle */ |
| switch (((reg_rdata >> RDATA_WACS_FSM_SHIFT) & |
| RDATA_WACS_FSM_MASK)) { |
| case WACS_FSM_WFVLDCLR: |
| write32(wacs_vldclr_register, 1); |
| pwrap_err("WACS_FSM = PMIC_WRAP_WACS_VLDCLR\n"); |
| break; |
| case WACS_FSM_WFDLE: |
| pwrap_err("WACS_FSM = WACS_FSM_WFDLE\n"); |
| break; |
| case WACS_FSM_REQ: |
| pwrap_err("WACS_FSM = WACS_FSM_REQ\n"); |
| break; |
| default: |
| break; |
| } |
| |
| if (stopwatch_expired(&sw)) |
| return E_PWR_WAIT_IDLE_TIMEOUT; |
| |
| } while (((reg_rdata >> RDATA_WACS_FSM_SHIFT) & RDATA_WACS_FSM_MASK) != |
| WACS_FSM_IDLE); /* IDLE State */ |
| if (read_reg) |
| *read_reg = reg_rdata; |
| return 0; |
| } |
| |
| u32 wait_for_state_ready(loop_condition_fp fp, u32 timeout_us, |
| void *wacs_register, u32 *read_reg) |
| { |
| u32 reg_rdata; |
| struct stopwatch sw; |
| |
| stopwatch_init_usecs_expire(&sw, timeout_us); |
| do { |
| reg_rdata = read32((wacs_register)); |
| |
| if (stopwatch_expired(&sw)) { |
| pwrap_err("timeout when waiting for idle\n"); |
| return E_PWR_WAIT_IDLE_TIMEOUT; |
| } |
| } while (fp(reg_rdata)); /* IDLE State */ |
| if (read_reg) |
| *read_reg = reg_rdata; |
| return 0; |
| } |
| |
| s32 pwrap_reset_spislv(void) |
| { |
| u32 ret = 0; |
| |
| write32(&mtk_pwrap->hiprio_arb_en, 0); |
| write32(&mtk_pwrap->wrap_en, 0); |
| write32(&mtk_pwrap->mux_sel, 1); |
| write32(&mtk_pwrap->man_en, 1); |
| write32(&mtk_pwrap->dio_en, 0); |
| |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_CSL << 8)); |
| /* Reset counter */ |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8)); |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_CSH << 8)); |
| /* |
| * In order to pull CSN signal to PMIC, |
| * PMIC will count it then reset spi slave |
| */ |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8)); |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8)); |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8)); |
| write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8)); |
| |
| if (wait_for_state_ready(wait_for_sync, TIMEOUT_WAIT_IDLE_US, |
| &mtk_pwrap->wacs2_rdata, 0)) |
| ret = E_PWR_TIMEOUT; |
| |
| write32(&mtk_pwrap->man_en, 0); |
| write32(&mtk_pwrap->mux_sel, 0); |
| |
| return ret; |
| } |
| |
| s32 pwrap_wacs2(u32 write, u16 addr, u16 wdata, u16 *rdata, u32 init_check) |
| { |
| u32 reg_rdata = 0; |
| u32 wacs_write = 0; |
| u32 wacs_addr = 0; |
| u32 wacs_cmd = 0; |
| u32 wait_result = 0; |
| |
| if (init_check) { |
| reg_rdata = read32(&mtk_pwrap->wacs2_rdata); |
| /* Prevent someone to use pwrap before pwrap init */ |
| if (((reg_rdata >> RDATA_INIT_DONE_SHIFT) & |
| RDATA_INIT_DONE_MASK) != WACS_INIT_DONE) { |
| pwrap_err("Pwrap initialization isn't finished\n"); |
| return E_PWR_NOT_INIT_DONE; |
| } |
| } |
| reg_rdata = 0; |
| /* Check IDLE in advance */ |
| wait_result = wait_for_state_idle(TIMEOUT_WAIT_IDLE_US, |
| &mtk_pwrap->wacs2_rdata, |
| &mtk_pwrap->wacs2_vldclr, |
| 0); |
| if (wait_result != 0) { |
| pwrap_err("wait_for_fsm_idle fail,wait_result=%d\n", |
| wait_result); |
| return E_PWR_WAIT_IDLE_TIMEOUT; |
| } |
| wacs_write = write << 31; |
| wacs_addr = (addr >> 1) << 16; |
| wacs_cmd = wacs_write | wacs_addr | wdata; |
| |
| write32(&mtk_pwrap->wacs2_cmd, wacs_cmd); |
| if (write == 0) { |
| if (rdata == NULL) { |
| pwrap_err("rdata is a NULL pointer\n"); |
| return E_PWR_INVALID_ARG; |
| } |
| wait_result = wait_for_state_ready(wait_for_fsm_vldclr, |
| TIMEOUT_READ_US, |
| &mtk_pwrap->wacs2_rdata, |
| ®_rdata); |
| if (wait_result != 0) { |
| pwrap_err("wait_for_fsm_vldclr fail,wait_result=%d\n", |
| wait_result); |
| return E_PWR_WAIT_IDLE_TIMEOUT_READ; |
| } |
| *rdata = ((reg_rdata >> RDATA_WACS_RDATA_SHIFT) |
| & RDATA_WACS_RDATA_MASK); |
| write32(&mtk_pwrap->wacs2_vldclr, 1); |
| } |
| |
| return 0; |
| } |