Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
James Lo | 2548 | 99.92% | 2 | 66.67% |
Uwe Kleine-König | 2 | 0.08% | 1 | 33.33% |
Total | 2550 | 3 |
// SPDX-License-Identifier: GPL-2.0 // // Copyright (c) 2021 MediaTek Inc. #include <linux/clk.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/spmi.h> #define SWINF_IDLE 0x00 #define SWINF_WFVLDCLR 0x06 #define GET_SWINF(x) (((x) >> 1) & 0x7) #define PMIF_CMD_REG_0 0 #define PMIF_CMD_REG 1 #define PMIF_CMD_EXT_REG 2 #define PMIF_CMD_EXT_REG_LONG 3 #define PMIF_DELAY_US 10 #define PMIF_TIMEOUT_US (10 * 1000) #define PMIF_CHAN_OFFSET 0x5 #define PMIF_MAX_CLKS 3 #define SPMI_OP_ST_BUSY 1 struct ch_reg { u32 ch_sta; u32 wdata; u32 rdata; u32 ch_send; u32 ch_rdy; }; struct pmif_data { const u32 *regs; const u32 *spmimst_regs; u32 soc_chan; }; struct pmif { void __iomem *base; void __iomem *spmimst_base; struct ch_reg chan; struct clk_bulk_data clks[PMIF_MAX_CLKS]; size_t nclks; const struct pmif_data *data; }; static const char * const pmif_clock_names[] = { "pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux", }; enum pmif_regs { PMIF_INIT_DONE, PMIF_INF_EN, PMIF_ARB_EN, PMIF_CMDISSUE_EN, PMIF_TIMER_CTRL, PMIF_SPI_MODE_CTRL, PMIF_IRQ_EVENT_EN_0, PMIF_IRQ_FLAG_0, PMIF_IRQ_CLR_0, PMIF_IRQ_EVENT_EN_1, PMIF_IRQ_FLAG_1, PMIF_IRQ_CLR_1, PMIF_IRQ_EVENT_EN_2, PMIF_IRQ_FLAG_2, PMIF_IRQ_CLR_2, PMIF_IRQ_EVENT_EN_3, PMIF_IRQ_FLAG_3, PMIF_IRQ_CLR_3, PMIF_IRQ_EVENT_EN_4, PMIF_IRQ_FLAG_4, PMIF_IRQ_CLR_4, PMIF_WDT_EVENT_EN_0, PMIF_WDT_FLAG_0, PMIF_WDT_EVENT_EN_1, PMIF_WDT_FLAG_1, PMIF_SWINF_0_STA, PMIF_SWINF_0_WDATA_31_0, PMIF_SWINF_0_RDATA_31_0, PMIF_SWINF_0_ACC, PMIF_SWINF_0_VLD_CLR, PMIF_SWINF_1_STA, PMIF_SWINF_1_WDATA_31_0, PMIF_SWINF_1_RDATA_31_0, PMIF_SWINF_1_ACC, PMIF_SWINF_1_VLD_CLR, PMIF_SWINF_2_STA, PMIF_SWINF_2_WDATA_31_0, PMIF_SWINF_2_RDATA_31_0, PMIF_SWINF_2_ACC, PMIF_SWINF_2_VLD_CLR, PMIF_SWINF_3_STA, PMIF_SWINF_3_WDATA_31_0, PMIF_SWINF_3_RDATA_31_0, PMIF_SWINF_3_ACC, PMIF_SWINF_3_VLD_CLR, }; static const u32 mt6873_regs[] = { [PMIF_INIT_DONE] = 0x0000, [PMIF_INF_EN] = 0x0024, [PMIF_ARB_EN] = 0x0150, [PMIF_CMDISSUE_EN] = 0x03B4, [PMIF_TIMER_CTRL] = 0x03E0, [PMIF_SPI_MODE_CTRL] = 0x0400, [PMIF_IRQ_EVENT_EN_0] = 0x0418, [PMIF_IRQ_FLAG_0] = 0x0420, [PMIF_IRQ_CLR_0] = 0x0424, [PMIF_IRQ_EVENT_EN_1] = 0x0428, [PMIF_IRQ_FLAG_1] = 0x0430, [PMIF_IRQ_CLR_1] = 0x0434, [PMIF_IRQ_EVENT_EN_2] = 0x0438, [PMIF_IRQ_FLAG_2] = 0x0440, [PMIF_IRQ_CLR_2] = 0x0444, [PMIF_IRQ_EVENT_EN_3] = 0x0448, [PMIF_IRQ_FLAG_3] = 0x0450, [PMIF_IRQ_CLR_3] = 0x0454, [PMIF_IRQ_EVENT_EN_4] = 0x0458, [PMIF_IRQ_FLAG_4] = 0x0460, [PMIF_IRQ_CLR_4] = 0x0464, [PMIF_WDT_EVENT_EN_0] = 0x046C, [PMIF_WDT_FLAG_0] = 0x0470, [PMIF_WDT_EVENT_EN_1] = 0x0474, [PMIF_WDT_FLAG_1] = 0x0478, [PMIF_SWINF_0_ACC] = 0x0C00, [PMIF_SWINF_0_WDATA_31_0] = 0x0C04, [PMIF_SWINF_0_RDATA_31_0] = 0x0C14, [PMIF_SWINF_0_VLD_CLR] = 0x0C24, [PMIF_SWINF_0_STA] = 0x0C28, [PMIF_SWINF_1_ACC] = 0x0C40, [PMIF_SWINF_1_WDATA_31_0] = 0x0C44, [PMIF_SWINF_1_RDATA_31_0] = 0x0C54, [PMIF_SWINF_1_VLD_CLR] = 0x0C64, [PMIF_SWINF_1_STA] = 0x0C68, [PMIF_SWINF_2_ACC] = 0x0C80, [PMIF_SWINF_2_WDATA_31_0] = 0x0C84, [PMIF_SWINF_2_RDATA_31_0] = 0x0C94, [PMIF_SWINF_2_VLD_CLR] = 0x0CA4, [PMIF_SWINF_2_STA] = 0x0CA8, [PMIF_SWINF_3_ACC] = 0x0CC0, [PMIF_SWINF_3_WDATA_31_0] = 0x0CC4, [PMIF_SWINF_3_RDATA_31_0] = 0x0CD4, [PMIF_SWINF_3_VLD_CLR] = 0x0CE4, [PMIF_SWINF_3_STA] = 0x0CE8, }; static const u32 mt8195_regs[] = { [PMIF_INIT_DONE] = 0x0000, [PMIF_INF_EN] = 0x0024, [PMIF_ARB_EN] = 0x0150, [PMIF_CMDISSUE_EN] = 0x03B8, [PMIF_TIMER_CTRL] = 0x03E4, [PMIF_SPI_MODE_CTRL] = 0x0408, [PMIF_IRQ_EVENT_EN_0] = 0x0420, [PMIF_IRQ_FLAG_0] = 0x0428, [PMIF_IRQ_CLR_0] = 0x042C, [PMIF_IRQ_EVENT_EN_1] = 0x0430, [PMIF_IRQ_FLAG_1] = 0x0438, [PMIF_IRQ_CLR_1] = 0x043C, [PMIF_IRQ_EVENT_EN_2] = 0x0440, [PMIF_IRQ_FLAG_2] = 0x0448, [PMIF_IRQ_CLR_2] = 0x044C, [PMIF_IRQ_EVENT_EN_3] = 0x0450, [PMIF_IRQ_FLAG_3] = 0x0458, [PMIF_IRQ_CLR_3] = 0x045C, [PMIF_IRQ_EVENT_EN_4] = 0x0460, [PMIF_IRQ_FLAG_4] = 0x0468, [PMIF_IRQ_CLR_4] = 0x046C, [PMIF_WDT_EVENT_EN_0] = 0x0474, [PMIF_WDT_FLAG_0] = 0x0478, [PMIF_WDT_EVENT_EN_1] = 0x047C, [PMIF_WDT_FLAG_1] = 0x0480, [PMIF_SWINF_0_ACC] = 0x0800, [PMIF_SWINF_0_WDATA_31_0] = 0x0804, [PMIF_SWINF_0_RDATA_31_0] = 0x0814, [PMIF_SWINF_0_VLD_CLR] = 0x0824, [PMIF_SWINF_0_STA] = 0x0828, [PMIF_SWINF_1_ACC] = 0x0840, [PMIF_SWINF_1_WDATA_31_0] = 0x0844, [PMIF_SWINF_1_RDATA_31_0] = 0x0854, [PMIF_SWINF_1_VLD_CLR] = 0x0864, [PMIF_SWINF_1_STA] = 0x0868, [PMIF_SWINF_2_ACC] = 0x0880, [PMIF_SWINF_2_WDATA_31_0] = 0x0884, [PMIF_SWINF_2_RDATA_31_0] = 0x0894, [PMIF_SWINF_2_VLD_CLR] = 0x08A4, [PMIF_SWINF_2_STA] = 0x08A8, [PMIF_SWINF_3_ACC] = 0x08C0, [PMIF_SWINF_3_WDATA_31_0] = 0x08C4, [PMIF_SWINF_3_RDATA_31_0] = 0x08D4, [PMIF_SWINF_3_VLD_CLR] = 0x08E4, [PMIF_SWINF_3_STA] = 0x08E8, }; enum spmi_regs { SPMI_OP_ST_CTRL, SPMI_GRP_ID_EN, SPMI_OP_ST_STA, SPMI_MST_SAMPL, SPMI_MST_REQ_EN, SPMI_REC_CTRL, SPMI_REC0, SPMI_REC1, SPMI_REC2, SPMI_REC3, SPMI_REC4, SPMI_MST_DBG, /* MT8195 spmi regs */ SPMI_MST_RCS_CTRL, SPMI_SLV_3_0_EINT, SPMI_SLV_7_4_EINT, SPMI_SLV_B_8_EINT, SPMI_SLV_F_C_EINT, SPMI_REC_CMD_DEC, SPMI_DEC_DBG, }; static const u32 mt6873_spmi_regs[] = { [SPMI_OP_ST_CTRL] = 0x0000, [SPMI_GRP_ID_EN] = 0x0004, [SPMI_OP_ST_STA] = 0x0008, [SPMI_MST_SAMPL] = 0x000c, [SPMI_MST_REQ_EN] = 0x0010, [SPMI_REC_CTRL] = 0x0040, [SPMI_REC0] = 0x0044, [SPMI_REC1] = 0x0048, [SPMI_REC2] = 0x004c, [SPMI_REC3] = 0x0050, [SPMI_REC4] = 0x0054, [SPMI_MST_DBG] = 0x00fc, }; static const u32 mt8195_spmi_regs[] = { [SPMI_OP_ST_CTRL] = 0x0000, [SPMI_GRP_ID_EN] = 0x0004, [SPMI_OP_ST_STA] = 0x0008, [SPMI_MST_SAMPL] = 0x000C, [SPMI_MST_REQ_EN] = 0x0010, [SPMI_MST_RCS_CTRL] = 0x0014, [SPMI_SLV_3_0_EINT] = 0x0020, [SPMI_SLV_7_4_EINT] = 0x0024, [SPMI_SLV_B_8_EINT] = 0x0028, [SPMI_SLV_F_C_EINT] = 0x002C, [SPMI_REC_CTRL] = 0x0040, [SPMI_REC0] = 0x0044, [SPMI_REC1] = 0x0048, [SPMI_REC2] = 0x004C, [SPMI_REC3] = 0x0050, [SPMI_REC4] = 0x0054, [SPMI_REC_CMD_DEC] = 0x005C, [SPMI_DEC_DBG] = 0x00F8, [SPMI_MST_DBG] = 0x00FC, }; static u32 pmif_readl(struct pmif *arb, enum pmif_regs reg) { return readl(arb->base + arb->data->regs[reg]); } static void pmif_writel(struct pmif *arb, u32 val, enum pmif_regs reg) { writel(val, arb->base + arb->data->regs[reg]); } static void mtk_spmi_writel(struct pmif *arb, u32 val, enum spmi_regs reg) { writel(val, arb->spmimst_base + arb->data->spmimst_regs[reg]); } static bool pmif_is_fsm_vldclr(struct pmif *arb) { u32 reg_rdata; reg_rdata = pmif_readl(arb, arb->chan.ch_sta); return GET_SWINF(reg_rdata) == SWINF_WFVLDCLR; } static int pmif_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid) { struct pmif *arb = spmi_controller_get_drvdata(ctrl); u32 rdata, cmd; int ret; /* Check the opcode */ if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP) return -EINVAL; cmd = opc - SPMI_CMD_RESET; mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL); ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->data->spmimst_regs[SPMI_OP_ST_STA], rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY, PMIF_DELAY_US, PMIF_TIMEOUT_US); if (ret < 0) dev_err(&ctrl->dev, "timeout, err = %d\n", ret); return ret; } static int pmif_spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, u16 addr, u8 *buf, size_t len) { struct pmif *arb = spmi_controller_get_drvdata(ctrl); struct ch_reg *inf_reg; int ret; u32 data, cmd; /* Check for argument validation. */ if (sid & ~0xf) { dev_err(&ctrl->dev, "exceed the max slv id\n"); return -EINVAL; } if (len > 4) { dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len); return -EINVAL; } if (opc >= 0x60 && opc <= 0x7f) opc = PMIF_CMD_REG; else if ((opc >= 0x20 && opc <= 0x2f) || (opc >= 0x38 && opc <= 0x3f)) opc = PMIF_CMD_EXT_REG_LONG; else return -EINVAL; /* Wait for Software Interface FSM state to be IDLE. */ inf_reg = &arb->chan; ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta], data, GET_SWINF(data) == SWINF_IDLE, PMIF_DELAY_US, PMIF_TIMEOUT_US); if (ret < 0) { /* set channel ready if the data has transferred */ if (pmif_is_fsm_vldclr(arb)) pmif_writel(arb, 1, inf_reg->ch_rdy); dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n"); return ret; } /* Send the command. */ cmd = (opc << 30) | (sid << 24) | ((len - 1) << 16) | addr; pmif_writel(arb, cmd, inf_reg->ch_send); /* * Wait for Software Interface FSM state to be WFVLDCLR, * read the data and clear the valid flag. */ ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta], data, GET_SWINF(data) == SWINF_WFVLDCLR, PMIF_DELAY_US, PMIF_TIMEOUT_US); if (ret < 0) { dev_err(&ctrl->dev, "failed to wait for SWINF_WFVLDCLR\n"); return ret; } data = pmif_readl(arb, inf_reg->rdata); memcpy(buf, &data, len); pmif_writel(arb, 1, inf_reg->ch_rdy); return 0; } static int pmif_spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, u16 addr, const u8 *buf, size_t len) { struct pmif *arb = spmi_controller_get_drvdata(ctrl); struct ch_reg *inf_reg; int ret; u32 data, cmd; if (len > 4) { dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len); return -EINVAL; } /* Check the opcode */ if (opc >= 0x40 && opc <= 0x5F) opc = PMIF_CMD_REG; else if ((opc <= 0xF) || (opc >= 0x30 && opc <= 0x37)) opc = PMIF_CMD_EXT_REG_LONG; else if (opc >= 0x80) opc = PMIF_CMD_REG_0; else return -EINVAL; /* Wait for Software Interface FSM state to be IDLE. */ inf_reg = &arb->chan; ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta], data, GET_SWINF(data) == SWINF_IDLE, PMIF_DELAY_US, PMIF_TIMEOUT_US); if (ret < 0) { /* set channel ready if the data has transferred */ if (pmif_is_fsm_vldclr(arb)) pmif_writel(arb, 1, inf_reg->ch_rdy); dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n"); return ret; } /* Set the write data. */ memcpy(&data, buf, len); pmif_writel(arb, data, inf_reg->wdata); /* Send the command. */ cmd = (opc << 30) | BIT(29) | (sid << 24) | ((len - 1) << 16) | addr; pmif_writel(arb, cmd, inf_reg->ch_send); return 0; } static const struct pmif_data mt6873_pmif_arb = { .regs = mt6873_regs, .spmimst_regs = mt6873_spmi_regs, .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 void 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); } 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 = mtk_spmi_match_table, }, .probe = mtk_spmi_probe, .remove_new = 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");
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