kernel-brax3-ubuntu-touch/drivers/spmi/spmi-mtk-pmif.c
erascape f319b992b1 kernel-5.15: Initial import brax3 UT kernel
* halium configs enabled

Signed-off-by: erascape <erascape@proton.me>
2025-09-23 15:17:10 +00:00

584 lines
14 KiB
C

// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 MediaTek Inc.
#include <linux/clk.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.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 (10 * 1000)
#define PMIF_CHAN_OFFSET 0x5
#define SPMI_OP_ST_BUSY 1
struct ch_reg {
u32 ch_sta;
u32 wdata;
u32 rdata;
u32 ch_send;
u32 ch_rdy;
};
struct pmif {
void __iomem *base;
const u32 *regs;
void __iomem *spmimst_base;
const u32 *spmimst_regs;
u32 soc_chan;
int grpid;
raw_spinlock_t lock;
struct clk *pmif_sys_ck;
struct clk *pmif_tmr_ck;
struct clk *spmimst_clk_mux;
struct ch_reg chan;
};
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 mt6853_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] = 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 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,
};
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,
/* MT6853 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 mt6853_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 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 u32 pmif_readl(struct pmif *arb, enum pmif_regs reg)
{
return readl(arb->base + arb->regs[reg]);
}
static void pmif_writel(struct pmif *arb, u32 val, enum pmif_regs reg)
{
writel(val, arb->base + arb->regs[reg]);
}
static void mtk_spmi_writel(struct pmif *arb, u32 val, enum spmi_regs reg)
{
writel(val, arb->spmimst_base + arb->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;
u8 cmd;
int ret;
/* Check the opcode */
if (opc == SPMI_CMD_RESET)
cmd = 0;
else if (opc == SPMI_CMD_SLEEP)
cmd = 1;
else if (opc == SPMI_CMD_SHUTDOWN)
cmd = 2;
else if (opc == SPMI_CMD_WAKEUP)
cmd = 3;
else
return -EINVAL;
mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL);
ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->spmimst_regs[SPMI_OP_ST_STA],
rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY,
PMIF_DELAY_US, PMIF_TIMEOUT);
if (ret < 0)
dev_err(&ctrl->dev, "timeout, err = %d\r\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 = NULL;
int ret;
u32 data = 0;
u8 bc = len - 1;
unsigned long flags;
/* Check for argument validation. */
if (sid & ~(0xf))
return -EINVAL;
if (!arb)
return -EINVAL;
inf_reg = &arb->chan;
/* Check the opcode */
if (opc >= 0x60 && opc <= 0x7f)
opc = PMIF_CMD_REG;
else if (opc >= 0x20 && opc <= 0x2f)
opc = PMIF_CMD_EXT_REG_LONG;
else if (opc >= 0x38 && opc <= 0x3f)
opc = PMIF_CMD_EXT_REG_LONG;
else
return -EINVAL;
raw_spin_lock_irqsave(&arb->lock, flags);
/* Wait for Software Interface FSM state to be IDLE. */
ret = readl_poll_timeout_atomic(arb->base + arb->regs[inf_reg->ch_sta],
data, GET_SWINF(data) == SWINF_IDLE,
PMIF_DELAY_US, PMIF_TIMEOUT);
if (ret < 0) {
dev_err(&ctrl->dev, "check IDLE timeout, read 0x%x, sta=0x%x, SPMI_DBG=0x%x\n",
addr, pmif_readl(arb, inf_reg->ch_sta),
readl(arb->spmimst_base + arb->spmimst_regs[SPMI_MST_DBG]));
/* set channel ready if the data has transferred */
if (pmif_is_fsm_vldclr(arb))
pmif_writel(arb, 1, inf_reg->ch_rdy);
raw_spin_unlock_irqrestore(&arb->lock, flags);
return ret;
}
/* Send the command. */
pmif_writel(arb,
(opc << 30) | (sid << 24) | (bc << 16) | addr,
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->regs[inf_reg->ch_sta],
data, GET_SWINF(data) == SWINF_WFVLDCLR,
PMIF_DELAY_US, PMIF_TIMEOUT);
if (ret < 0) {
dev_err(&ctrl->dev, "check WFVLDCLR timeout, read 0x%x, sta=0x%x, SPMI_DBG=0x%x\n",
addr, pmif_readl(arb, inf_reg->ch_sta),
readl(arb->spmimst_base + arb->spmimst_regs[SPMI_MST_DBG]));
raw_spin_unlock_irqrestore(&arb->lock, flags);
return ret;
}
data = pmif_readl(arb, inf_reg->rdata);
memcpy(buf, &data, (bc & 3) + 1);
pmif_writel(arb, 1, inf_reg->ch_rdy);
raw_spin_unlock_irqrestore(&arb->lock, flags);
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 = NULL;
int ret;
u32 data = 0;
u8 bc = len - 1;
unsigned long flags = 0;
/* Check for argument validation. */
if (sid & ~(0xf))
return -EINVAL;
if (!arb)
return -EINVAL;
inf_reg = &arb->chan;
/* Check the opcode */
if (opc >= 0x40 && opc <= 0x5F)
opc = PMIF_CMD_REG;
else if (opc <= 0x0F)
opc = PMIF_CMD_EXT_REG_LONG;
else if (opc >= 0x30 && opc <= 0x37)
opc = PMIF_CMD_EXT_REG_LONG;
else if (opc >= 0x80)
opc = PMIF_CMD_REG_0;
else
return -EINVAL;
raw_spin_lock_irqsave(&arb->lock, flags);
/* Wait for Software Interface FSM state to be IDLE. */
ret = readl_poll_timeout_atomic(arb->base + arb->regs[inf_reg->ch_sta],
data, GET_SWINF(data) == SWINF_IDLE,
PMIF_DELAY_US, PMIF_TIMEOUT);
if (ret < 0) {
dev_err(&ctrl->dev, "check IDLE timeout, read 0x%x, sta=0x%x, SPMI_DBG=0x%x\n",
addr, pmif_readl(arb, inf_reg->ch_sta),
readl(arb->spmimst_base + arb->spmimst_regs[SPMI_MST_DBG]));
/* set channel ready if the data has transferred */
if (pmif_is_fsm_vldclr(arb))
pmif_writel(arb, 1, inf_reg->ch_rdy);
raw_spin_unlock_irqrestore(&arb->lock, flags);
return ret;
}
/* Set the write data. */
memcpy(&data, buf, (bc & 3) + 1);
pmif_writel(arb, data, inf_reg->wdata);
/* Send the command. */
pmif_writel(arb,
(opc << 30) | BIT(29) | (sid << 24) | (bc << 16) | addr,
inf_reg->ch_send);
raw_spin_unlock_irqrestore(&arb->lock, flags);
return 0;
}
static struct pmif mt6853_pmif_arb[] = {
{
.regs = mt6853_regs,
.spmimst_regs = mt6853_spmi_regs,
.soc_chan = 2,
},
};
static struct pmif mt6873_pmif_arb[] = {
{
.regs = mt6873_regs,
.spmimst_regs = mt6873_spmi_regs,
.soc_chan = 2,
},
};
static struct pmif mt6893_pmif_arb[] = {
{
.regs = mt6873_regs,
.spmimst_regs = mt6873_spmi_regs,
.soc_chan = 2,
},
};
static int mtk_spmi_probe(struct platform_device *pdev)
{
struct pmif *arb;
struct resource *res;
struct spmi_controller *ctrl;
int err = 0;
ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*arb));
if (!ctrl)
return -ENOMEM;
ctrl->cmd = pmif_arb_cmd;
ctrl->read_cmd = pmif_spmi_read_cmd;
ctrl->write_cmd = pmif_spmi_write_cmd;
/* re-assign of_id->data */
spmi_controller_set_drvdata(ctrl, (void *)of_device_get_match_data(&pdev->dev));
arb = spmi_controller_get_drvdata(ctrl);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmif");
arb->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(arb->base)) {
err = PTR_ERR(arb->base);
goto err_put_ctrl;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spmimst");
arb->spmimst_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(arb->spmimst_base)) {
err = PTR_ERR(arb->spmimst_base);
goto err_put_ctrl;
}
arb->pmif_sys_ck = devm_clk_get(&pdev->dev, "pmif_sys_ck");
if (IS_ERR(arb->pmif_sys_ck)) {
dev_err(&pdev->dev, "[PMIF]:failed to get ap clock: %ld\n",
PTR_ERR(arb->pmif_sys_ck));
goto err_put_ctrl;
}
arb->pmif_tmr_ck = devm_clk_get(&pdev->dev, "pmif_tmr_ck");
if (IS_ERR(arb->pmif_tmr_ck)) {
dev_err(&pdev->dev, "[PMIF]:failed to get tmr clock: %ld\n",
PTR_ERR(arb->pmif_tmr_ck));
goto err_put_ctrl;
}
arb->spmimst_clk_mux = devm_clk_get(&pdev->dev, "spmimst_clk_mux");
if (IS_ERR(arb->spmimst_clk_mux)) {
dev_err(&pdev->dev, "[SPMIMST]:failed to get clock: %ld\n",
PTR_ERR(arb->spmimst_clk_mux));
goto err_put_ctrl;
}
err = clk_prepare_enable(arb->spmimst_clk_mux);
if (err) {
dev_err(&pdev->dev, "[PMIF]:failed to enable spmi master clk.\n");
goto err_put_ctrl;
}
arb->chan.ch_sta = PMIF_SWINF_0_STA + (PMIF_CHAN_OFFSET * arb->soc_chan);
arb->chan.wdata = PMIF_SWINF_0_WDATA_31_0 + (PMIF_CHAN_OFFSET * arb->soc_chan);
arb->chan.rdata = PMIF_SWINF_0_RDATA_31_0 + (PMIF_CHAN_OFFSET * arb->soc_chan);
arb->chan.ch_send = PMIF_SWINF_0_ACC + (PMIF_CHAN_OFFSET * arb->soc_chan);
arb->chan.ch_rdy = PMIF_SWINF_0_VLD_CLR + (PMIF_CHAN_OFFSET * arb->soc_chan);
raw_spin_lock_init(&arb->lock);
platform_set_drvdata(pdev, ctrl);
err = spmi_controller_add(ctrl);
if (err)
goto err_domain_remove;
return 0;
err_domain_remove:
clk_disable_unprepare(arb->spmimst_clk_mux);
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);
spmi_controller_remove(ctrl);
spmi_controller_put(ctrl);
return 0;
}
static const struct of_device_id mtk_spmi_match_table[] = {
{
.compatible = "mediatek,mt6853-spmi",
.data = &mt6853_pmif_arb,
}, {
.compatible = "mediatek,mt6873-spmi",
.data = &mt6873_pmif_arb,
}, {
.compatible = "mediatek,mt6893-spmi",
.data = &mt6893_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");