543 строки
13 KiB
C
543 строки
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2021 MediaTek Inc.
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#include <linux/clk.h>
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#include <linux/iopoll.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/spmi.h>
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#define SWINF_IDLE 0x00
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#define SWINF_WFVLDCLR 0x06
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#define GET_SWINF(x) (((x) >> 1) & 0x7)
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#define PMIF_CMD_REG_0 0
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#define PMIF_CMD_REG 1
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#define PMIF_CMD_EXT_REG 2
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#define PMIF_CMD_EXT_REG_LONG 3
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#define PMIF_DELAY_US 10
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#define PMIF_TIMEOUT_US (10 * 1000)
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#define PMIF_CHAN_OFFSET 0x5
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#define PMIF_MAX_CLKS 3
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#define SPMI_OP_ST_BUSY 1
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struct ch_reg {
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u32 ch_sta;
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u32 wdata;
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u32 rdata;
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u32 ch_send;
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u32 ch_rdy;
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};
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struct pmif_data {
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const u32 *regs;
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const u32 *spmimst_regs;
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u32 soc_chan;
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};
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struct pmif {
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void __iomem *base;
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void __iomem *spmimst_base;
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struct ch_reg chan;
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struct clk_bulk_data clks[PMIF_MAX_CLKS];
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size_t nclks;
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const struct pmif_data *data;
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};
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static const char * const pmif_clock_names[] = {
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"pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux",
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};
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enum pmif_regs {
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PMIF_INIT_DONE,
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PMIF_INF_EN,
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PMIF_ARB_EN,
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PMIF_CMDISSUE_EN,
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PMIF_TIMER_CTRL,
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PMIF_SPI_MODE_CTRL,
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PMIF_IRQ_EVENT_EN_0,
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PMIF_IRQ_FLAG_0,
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PMIF_IRQ_CLR_0,
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PMIF_IRQ_EVENT_EN_1,
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PMIF_IRQ_FLAG_1,
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PMIF_IRQ_CLR_1,
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PMIF_IRQ_EVENT_EN_2,
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PMIF_IRQ_FLAG_2,
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PMIF_IRQ_CLR_2,
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PMIF_IRQ_EVENT_EN_3,
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PMIF_IRQ_FLAG_3,
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PMIF_IRQ_CLR_3,
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PMIF_IRQ_EVENT_EN_4,
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PMIF_IRQ_FLAG_4,
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PMIF_IRQ_CLR_4,
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PMIF_WDT_EVENT_EN_0,
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PMIF_WDT_FLAG_0,
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PMIF_WDT_EVENT_EN_1,
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PMIF_WDT_FLAG_1,
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PMIF_SWINF_0_STA,
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PMIF_SWINF_0_WDATA_31_0,
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PMIF_SWINF_0_RDATA_31_0,
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PMIF_SWINF_0_ACC,
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PMIF_SWINF_0_VLD_CLR,
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PMIF_SWINF_1_STA,
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PMIF_SWINF_1_WDATA_31_0,
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PMIF_SWINF_1_RDATA_31_0,
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PMIF_SWINF_1_ACC,
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PMIF_SWINF_1_VLD_CLR,
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PMIF_SWINF_2_STA,
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PMIF_SWINF_2_WDATA_31_0,
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PMIF_SWINF_2_RDATA_31_0,
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PMIF_SWINF_2_ACC,
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PMIF_SWINF_2_VLD_CLR,
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PMIF_SWINF_3_STA,
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PMIF_SWINF_3_WDATA_31_0,
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PMIF_SWINF_3_RDATA_31_0,
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PMIF_SWINF_3_ACC,
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PMIF_SWINF_3_VLD_CLR,
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};
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static const u32 mt6873_regs[] = {
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[PMIF_INIT_DONE] = 0x0000,
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[PMIF_INF_EN] = 0x0024,
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[PMIF_ARB_EN] = 0x0150,
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[PMIF_CMDISSUE_EN] = 0x03B4,
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[PMIF_TIMER_CTRL] = 0x03E0,
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[PMIF_SPI_MODE_CTRL] = 0x0400,
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[PMIF_IRQ_EVENT_EN_0] = 0x0418,
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[PMIF_IRQ_FLAG_0] = 0x0420,
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[PMIF_IRQ_CLR_0] = 0x0424,
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[PMIF_IRQ_EVENT_EN_1] = 0x0428,
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[PMIF_IRQ_FLAG_1] = 0x0430,
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[PMIF_IRQ_CLR_1] = 0x0434,
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[PMIF_IRQ_EVENT_EN_2] = 0x0438,
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[PMIF_IRQ_FLAG_2] = 0x0440,
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[PMIF_IRQ_CLR_2] = 0x0444,
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[PMIF_IRQ_EVENT_EN_3] = 0x0448,
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[PMIF_IRQ_FLAG_3] = 0x0450,
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[PMIF_IRQ_CLR_3] = 0x0454,
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[PMIF_IRQ_EVENT_EN_4] = 0x0458,
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[PMIF_IRQ_FLAG_4] = 0x0460,
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[PMIF_IRQ_CLR_4] = 0x0464,
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[PMIF_WDT_EVENT_EN_0] = 0x046C,
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[PMIF_WDT_FLAG_0] = 0x0470,
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[PMIF_WDT_EVENT_EN_1] = 0x0474,
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[PMIF_WDT_FLAG_1] = 0x0478,
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[PMIF_SWINF_0_ACC] = 0x0C00,
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[PMIF_SWINF_0_WDATA_31_0] = 0x0C04,
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[PMIF_SWINF_0_RDATA_31_0] = 0x0C14,
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[PMIF_SWINF_0_VLD_CLR] = 0x0C24,
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[PMIF_SWINF_0_STA] = 0x0C28,
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[PMIF_SWINF_1_ACC] = 0x0C40,
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[PMIF_SWINF_1_WDATA_31_0] = 0x0C44,
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[PMIF_SWINF_1_RDATA_31_0] = 0x0C54,
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[PMIF_SWINF_1_VLD_CLR] = 0x0C64,
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[PMIF_SWINF_1_STA] = 0x0C68,
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[PMIF_SWINF_2_ACC] = 0x0C80,
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[PMIF_SWINF_2_WDATA_31_0] = 0x0C84,
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[PMIF_SWINF_2_RDATA_31_0] = 0x0C94,
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[PMIF_SWINF_2_VLD_CLR] = 0x0CA4,
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[PMIF_SWINF_2_STA] = 0x0CA8,
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[PMIF_SWINF_3_ACC] = 0x0CC0,
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[PMIF_SWINF_3_WDATA_31_0] = 0x0CC4,
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[PMIF_SWINF_3_RDATA_31_0] = 0x0CD4,
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[PMIF_SWINF_3_VLD_CLR] = 0x0CE4,
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[PMIF_SWINF_3_STA] = 0x0CE8,
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};
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static const u32 mt8195_regs[] = {
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[PMIF_INIT_DONE] = 0x0000,
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[PMIF_INF_EN] = 0x0024,
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[PMIF_ARB_EN] = 0x0150,
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[PMIF_CMDISSUE_EN] = 0x03B8,
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[PMIF_TIMER_CTRL] = 0x03E4,
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[PMIF_SPI_MODE_CTRL] = 0x0408,
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[PMIF_IRQ_EVENT_EN_0] = 0x0420,
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[PMIF_IRQ_FLAG_0] = 0x0428,
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[PMIF_IRQ_CLR_0] = 0x042C,
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[PMIF_IRQ_EVENT_EN_1] = 0x0430,
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[PMIF_IRQ_FLAG_1] = 0x0438,
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[PMIF_IRQ_CLR_1] = 0x043C,
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[PMIF_IRQ_EVENT_EN_2] = 0x0440,
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[PMIF_IRQ_FLAG_2] = 0x0448,
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[PMIF_IRQ_CLR_2] = 0x044C,
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[PMIF_IRQ_EVENT_EN_3] = 0x0450,
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[PMIF_IRQ_FLAG_3] = 0x0458,
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[PMIF_IRQ_CLR_3] = 0x045C,
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[PMIF_IRQ_EVENT_EN_4] = 0x0460,
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[PMIF_IRQ_FLAG_4] = 0x0468,
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[PMIF_IRQ_CLR_4] = 0x046C,
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[PMIF_WDT_EVENT_EN_0] = 0x0474,
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[PMIF_WDT_FLAG_0] = 0x0478,
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[PMIF_WDT_EVENT_EN_1] = 0x047C,
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[PMIF_WDT_FLAG_1] = 0x0480,
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[PMIF_SWINF_0_ACC] = 0x0800,
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[PMIF_SWINF_0_WDATA_31_0] = 0x0804,
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[PMIF_SWINF_0_RDATA_31_0] = 0x0814,
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[PMIF_SWINF_0_VLD_CLR] = 0x0824,
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[PMIF_SWINF_0_STA] = 0x0828,
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[PMIF_SWINF_1_ACC] = 0x0840,
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[PMIF_SWINF_1_WDATA_31_0] = 0x0844,
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[PMIF_SWINF_1_RDATA_31_0] = 0x0854,
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[PMIF_SWINF_1_VLD_CLR] = 0x0864,
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[PMIF_SWINF_1_STA] = 0x0868,
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[PMIF_SWINF_2_ACC] = 0x0880,
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[PMIF_SWINF_2_WDATA_31_0] = 0x0884,
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[PMIF_SWINF_2_RDATA_31_0] = 0x0894,
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[PMIF_SWINF_2_VLD_CLR] = 0x08A4,
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[PMIF_SWINF_2_STA] = 0x08A8,
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[PMIF_SWINF_3_ACC] = 0x08C0,
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[PMIF_SWINF_3_WDATA_31_0] = 0x08C4,
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[PMIF_SWINF_3_RDATA_31_0] = 0x08D4,
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[PMIF_SWINF_3_VLD_CLR] = 0x08E4,
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[PMIF_SWINF_3_STA] = 0x08E8,
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};
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enum spmi_regs {
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SPMI_OP_ST_CTRL,
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SPMI_GRP_ID_EN,
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SPMI_OP_ST_STA,
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SPMI_MST_SAMPL,
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SPMI_MST_REQ_EN,
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SPMI_REC_CTRL,
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SPMI_REC0,
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SPMI_REC1,
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SPMI_REC2,
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SPMI_REC3,
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SPMI_REC4,
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SPMI_MST_DBG,
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/* MT8195 spmi regs */
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SPMI_MST_RCS_CTRL,
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SPMI_SLV_3_0_EINT,
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SPMI_SLV_7_4_EINT,
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SPMI_SLV_B_8_EINT,
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SPMI_SLV_F_C_EINT,
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SPMI_REC_CMD_DEC,
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SPMI_DEC_DBG,
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};
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static const u32 mt6873_spmi_regs[] = {
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[SPMI_OP_ST_CTRL] = 0x0000,
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[SPMI_GRP_ID_EN] = 0x0004,
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[SPMI_OP_ST_STA] = 0x0008,
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[SPMI_MST_SAMPL] = 0x000c,
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[SPMI_MST_REQ_EN] = 0x0010,
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[SPMI_REC_CTRL] = 0x0040,
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[SPMI_REC0] = 0x0044,
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[SPMI_REC1] = 0x0048,
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[SPMI_REC2] = 0x004c,
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[SPMI_REC3] = 0x0050,
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[SPMI_REC4] = 0x0054,
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[SPMI_MST_DBG] = 0x00fc,
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};
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static const u32 mt8195_spmi_regs[] = {
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[SPMI_OP_ST_CTRL] = 0x0000,
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[SPMI_GRP_ID_EN] = 0x0004,
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[SPMI_OP_ST_STA] = 0x0008,
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[SPMI_MST_SAMPL] = 0x000C,
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[SPMI_MST_REQ_EN] = 0x0010,
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[SPMI_MST_RCS_CTRL] = 0x0014,
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[SPMI_SLV_3_0_EINT] = 0x0020,
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[SPMI_SLV_7_4_EINT] = 0x0024,
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[SPMI_SLV_B_8_EINT] = 0x0028,
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[SPMI_SLV_F_C_EINT] = 0x002C,
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[SPMI_REC_CTRL] = 0x0040,
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[SPMI_REC0] = 0x0044,
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[SPMI_REC1] = 0x0048,
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[SPMI_REC2] = 0x004C,
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[SPMI_REC3] = 0x0050,
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[SPMI_REC4] = 0x0054,
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[SPMI_REC_CMD_DEC] = 0x005C,
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[SPMI_DEC_DBG] = 0x00F8,
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[SPMI_MST_DBG] = 0x00FC,
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};
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static u32 pmif_readl(struct pmif *arb, enum pmif_regs reg)
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{
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return readl(arb->base + arb->data->regs[reg]);
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}
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static void pmif_writel(struct pmif *arb, u32 val, enum pmif_regs reg)
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{
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writel(val, arb->base + arb->data->regs[reg]);
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}
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static void mtk_spmi_writel(struct pmif *arb, u32 val, enum spmi_regs reg)
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{
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writel(val, arb->spmimst_base + arb->data->spmimst_regs[reg]);
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}
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static bool pmif_is_fsm_vldclr(struct pmif *arb)
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{
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u32 reg_rdata;
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reg_rdata = pmif_readl(arb, arb->chan.ch_sta);
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return GET_SWINF(reg_rdata) == SWINF_WFVLDCLR;
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}
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static int pmif_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
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{
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struct pmif *arb = spmi_controller_get_drvdata(ctrl);
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u32 rdata, cmd;
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int ret;
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/* Check the opcode */
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if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
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return -EINVAL;
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cmd = opc - SPMI_CMD_RESET;
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mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL);
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ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->data->spmimst_regs[SPMI_OP_ST_STA],
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rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY,
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PMIF_DELAY_US, PMIF_TIMEOUT_US);
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if (ret < 0)
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dev_err(&ctrl->dev, "timeout, err = %d\n", ret);
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return ret;
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}
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static int pmif_spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
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u16 addr, u8 *buf, size_t len)
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{
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struct pmif *arb = spmi_controller_get_drvdata(ctrl);
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struct ch_reg *inf_reg;
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int ret;
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u32 data, cmd;
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/* Check for argument validation. */
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if (sid & ~0xf) {
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dev_err(&ctrl->dev, "exceed the max slv id\n");
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return -EINVAL;
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}
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if (len > 4) {
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dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
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return -EINVAL;
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}
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if (opc >= 0x60 && opc <= 0x7f)
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opc = PMIF_CMD_REG;
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else if ((opc >= 0x20 && opc <= 0x2f) || (opc >= 0x38 && opc <= 0x3f))
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opc = PMIF_CMD_EXT_REG_LONG;
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else
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return -EINVAL;
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/* Wait for Software Interface FSM state to be IDLE. */
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inf_reg = &arb->chan;
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ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
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data, GET_SWINF(data) == SWINF_IDLE,
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PMIF_DELAY_US, PMIF_TIMEOUT_US);
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if (ret < 0) {
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/* set channel ready if the data has transferred */
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if (pmif_is_fsm_vldclr(arb))
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pmif_writel(arb, 1, inf_reg->ch_rdy);
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dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
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return ret;
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}
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/* Send the command. */
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cmd = (opc << 30) | (sid << 24) | ((len - 1) << 16) | addr;
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pmif_writel(arb, cmd, inf_reg->ch_send);
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/*
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* Wait for Software Interface FSM state to be WFVLDCLR,
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* read the data and clear the valid flag.
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*/
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ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
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data, GET_SWINF(data) == SWINF_WFVLDCLR,
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PMIF_DELAY_US, PMIF_TIMEOUT_US);
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if (ret < 0) {
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dev_err(&ctrl->dev, "failed to wait for SWINF_WFVLDCLR\n");
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return ret;
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}
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data = pmif_readl(arb, inf_reg->rdata);
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memcpy(buf, &data, len);
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pmif_writel(arb, 1, inf_reg->ch_rdy);
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return 0;
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}
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static int pmif_spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
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u16 addr, const u8 *buf, size_t len)
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{
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struct pmif *arb = spmi_controller_get_drvdata(ctrl);
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struct ch_reg *inf_reg;
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int ret;
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u32 data, cmd;
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if (len > 4) {
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dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
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return -EINVAL;
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}
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/* Check the opcode */
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if (opc >= 0x40 && opc <= 0x5F)
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opc = PMIF_CMD_REG;
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else if ((opc <= 0xF) || (opc >= 0x30 && opc <= 0x37))
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opc = PMIF_CMD_EXT_REG_LONG;
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else if (opc >= 0x80)
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opc = PMIF_CMD_REG_0;
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else
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return -EINVAL;
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/* Wait for Software Interface FSM state to be IDLE. */
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inf_reg = &arb->chan;
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ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
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data, GET_SWINF(data) == SWINF_IDLE,
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PMIF_DELAY_US, PMIF_TIMEOUT_US);
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if (ret < 0) {
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/* set channel ready if the data has transferred */
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if (pmif_is_fsm_vldclr(arb))
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pmif_writel(arb, 1, inf_reg->ch_rdy);
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dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
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return ret;
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}
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/* Set the write data. */
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memcpy(&data, buf, len);
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pmif_writel(arb, data, inf_reg->wdata);
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/* Send the command. */
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cmd = (opc << 30) | BIT(29) | (sid << 24) | ((len - 1) << 16) | addr;
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pmif_writel(arb, cmd, inf_reg->ch_send);
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return 0;
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}
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static const struct pmif_data mt6873_pmif_arb = {
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.regs = mt6873_regs,
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.spmimst_regs = mt6873_spmi_regs,
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|
.soc_chan = 2,
|
|
};
|
|
|
|
static const struct pmif_data mt8195_pmif_arb = {
|
|
.regs = mt8195_regs,
|
|
.spmimst_regs = mt8195_spmi_regs,
|
|
.soc_chan = 2,
|
|
};
|
|
|
|
static int mtk_spmi_probe(struct platform_device *pdev)
|
|
{
|
|
struct pmif *arb;
|
|
struct spmi_controller *ctrl;
|
|
int err, i;
|
|
u32 chan_offset;
|
|
|
|
ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*arb));
|
|
if (!ctrl)
|
|
return -ENOMEM;
|
|
|
|
arb = spmi_controller_get_drvdata(ctrl);
|
|
arb->data = device_get_match_data(&pdev->dev);
|
|
if (!arb->data) {
|
|
err = -EINVAL;
|
|
dev_err(&pdev->dev, "Cannot get drv_data\n");
|
|
goto err_put_ctrl;
|
|
}
|
|
|
|
arb->base = devm_platform_ioremap_resource_byname(pdev, "pmif");
|
|
if (IS_ERR(arb->base)) {
|
|
err = PTR_ERR(arb->base);
|
|
goto err_put_ctrl;
|
|
}
|
|
|
|
arb->spmimst_base = devm_platform_ioremap_resource_byname(pdev, "spmimst");
|
|
if (IS_ERR(arb->spmimst_base)) {
|
|
err = PTR_ERR(arb->spmimst_base);
|
|
goto err_put_ctrl;
|
|
}
|
|
|
|
arb->nclks = ARRAY_SIZE(pmif_clock_names);
|
|
for (i = 0; i < arb->nclks; i++)
|
|
arb->clks[i].id = pmif_clock_names[i];
|
|
|
|
err = devm_clk_bulk_get(&pdev->dev, arb->nclks, arb->clks);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to get clocks: %d\n", err);
|
|
goto err_put_ctrl;
|
|
}
|
|
|
|
err = clk_bulk_prepare_enable(arb->nclks, arb->clks);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to enable clocks: %d\n", err);
|
|
goto err_put_ctrl;
|
|
}
|
|
|
|
ctrl->cmd = pmif_arb_cmd;
|
|
ctrl->read_cmd = pmif_spmi_read_cmd;
|
|
ctrl->write_cmd = pmif_spmi_write_cmd;
|
|
|
|
chan_offset = PMIF_CHAN_OFFSET * arb->data->soc_chan;
|
|
arb->chan.ch_sta = PMIF_SWINF_0_STA + chan_offset;
|
|
arb->chan.wdata = PMIF_SWINF_0_WDATA_31_0 + chan_offset;
|
|
arb->chan.rdata = PMIF_SWINF_0_RDATA_31_0 + chan_offset;
|
|
arb->chan.ch_send = PMIF_SWINF_0_ACC + chan_offset;
|
|
arb->chan.ch_rdy = PMIF_SWINF_0_VLD_CLR + chan_offset;
|
|
|
|
platform_set_drvdata(pdev, ctrl);
|
|
|
|
err = spmi_controller_add(ctrl);
|
|
if (err)
|
|
goto err_domain_remove;
|
|
|
|
return 0;
|
|
|
|
err_domain_remove:
|
|
clk_bulk_disable_unprepare(arb->nclks, arb->clks);
|
|
err_put_ctrl:
|
|
spmi_controller_put(ctrl);
|
|
return err;
|
|
}
|
|
|
|
static int mtk_spmi_remove(struct platform_device *pdev)
|
|
{
|
|
struct spmi_controller *ctrl = platform_get_drvdata(pdev);
|
|
struct pmif *arb = spmi_controller_get_drvdata(ctrl);
|
|
|
|
clk_bulk_disable_unprepare(arb->nclks, arb->clks);
|
|
spmi_controller_remove(ctrl);
|
|
spmi_controller_put(ctrl);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mtk_spmi_match_table[] = {
|
|
{
|
|
.compatible = "mediatek,mt6873-spmi",
|
|
.data = &mt6873_pmif_arb,
|
|
}, {
|
|
.compatible = "mediatek,mt8195-spmi",
|
|
.data = &mt8195_pmif_arb,
|
|
}, {
|
|
/* sentinel */
|
|
},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mtk_spmi_match_table);
|
|
|
|
static struct platform_driver mtk_spmi_driver = {
|
|
.driver = {
|
|
.name = "spmi-mtk",
|
|
.of_match_table = of_match_ptr(mtk_spmi_match_table),
|
|
},
|
|
.probe = mtk_spmi_probe,
|
|
.remove = mtk_spmi_remove,
|
|
};
|
|
module_platform_driver(mtk_spmi_driver);
|
|
|
|
MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
|
|
MODULE_DESCRIPTION("MediaTek SPMI Driver");
|
|
MODULE_LICENSE("GPL");
|