[PATCH v2 3/4] spi: Add MFD for Macronix MX25F0A SPI controller driver
From: Mason Yang
Date: Mon Apr 08 2019 - 22:11:52 EST
Add a MFD driver for Macronix MX25F0A SPI controller.
Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx>
---
drivers/spi/spi-mxic.c | 275 +++++++++----------------------------------------
1 file changed, 49 insertions(+), 226 deletions(-)
diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c
index e41ae6e..f98f8e0 100644
--- a/drivers/spi/spi-mxic.c
+++ b/drivers/spi/spi-mxic.c
@@ -9,168 +9,13 @@
//
#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
+#include <linux/mfd/mxic-mx25f0a.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
-#define HC_CFG 0x0
-#define HC_CFG_IF_CFG(x) ((x) << 27)
-#define HC_CFG_DUAL_SLAVE BIT(31)
-#define HC_CFG_INDIVIDUAL BIT(30)
-#define HC_CFG_NIO(x) (((x) / 4) << 27)
-#define HC_CFG_TYPE(s, t) ((t) << (23 + ((s) * 2)))
-#define HC_CFG_TYPE_SPI_NOR 0
-#define HC_CFG_TYPE_SPI_NAND 1
-#define HC_CFG_TYPE_SPI_RAM 2
-#define HC_CFG_TYPE_RAW_NAND 3
-#define HC_CFG_SLV_ACT(x) ((x) << 21)
-#define HC_CFG_CLK_PH_EN BIT(20)
-#define HC_CFG_CLK_POL_INV BIT(19)
-#define HC_CFG_BIG_ENDIAN BIT(18)
-#define HC_CFG_DATA_PASS BIT(17)
-#define HC_CFG_IDLE_SIO_LVL(x) ((x) << 16)
-#define HC_CFG_MAN_START_EN BIT(3)
-#define HC_CFG_MAN_START BIT(2)
-#define HC_CFG_MAN_CS_EN BIT(1)
-#define HC_CFG_MAN_CS_ASSERT BIT(0)
-
-#define INT_STS 0x4
-#define INT_STS_EN 0x8
-#define INT_SIG_EN 0xc
-#define INT_STS_ALL GENMASK(31, 0)
-#define INT_RDY_PIN BIT(26)
-#define INT_RDY_SR BIT(25)
-#define INT_LNR_SUSP BIT(24)
-#define INT_ECC_ERR BIT(17)
-#define INT_CRC_ERR BIT(16)
-#define INT_LWR_DIS BIT(12)
-#define INT_LRD_DIS BIT(11)
-#define INT_SDMA_INT BIT(10)
-#define INT_DMA_FINISH BIT(9)
-#define INT_RX_NOT_FULL BIT(3)
-#define INT_RX_NOT_EMPTY BIT(2)
-#define INT_TX_NOT_FULL BIT(1)
-#define INT_TX_EMPTY BIT(0)
-
-#define HC_EN 0x10
-#define HC_EN_BIT BIT(0)
-
-#define TXD(x) (0x14 + ((x) * 4))
-#define RXD 0x24
-
-#define SS_CTRL(s) (0x30 + ((s) * 4))
-#define LRD_CFG 0x44
-#define LWR_CFG 0x80
-#define RWW_CFG 0x70
-#define OP_READ BIT(23)
-#define OP_DUMMY_CYC(x) ((x) << 17)
-#define OP_ADDR_BYTES(x) ((x) << 14)
-#define OP_CMD_BYTES(x) (((x) - 1) << 13)
-#define OP_OCTA_CRC_EN BIT(12)
-#define OP_DQS_EN BIT(11)
-#define OP_ENHC_EN BIT(10)
-#define OP_PREAMBLE_EN BIT(9)
-#define OP_DATA_DDR BIT(8)
-#define OP_DATA_BUSW(x) ((x) << 6)
-#define OP_ADDR_DDR BIT(5)
-#define OP_ADDR_BUSW(x) ((x) << 3)
-#define OP_CMD_DDR BIT(2)
-#define OP_CMD_BUSW(x) (x)
-#define OP_BUSW_1 0
-#define OP_BUSW_2 1
-#define OP_BUSW_4 2
-#define OP_BUSW_8 3
-
-#define OCTA_CRC 0x38
-#define OCTA_CRC_IN_EN(s) BIT(3 + ((s) * 16))
-#define OCTA_CRC_CHUNK(s, x) ((fls((x) / 32)) << (1 + ((s) * 16)))
-#define OCTA_CRC_OUT_EN(s) BIT(0 + ((s) * 16))
-
-#define ONFI_DIN_CNT(s) (0x3c + (s))
-
-#define LRD_CTRL 0x48
-#define RWW_CTRL 0x74
-#define LWR_CTRL 0x84
-#define LMODE_EN BIT(31)
-#define LMODE_SLV_ACT(x) ((x) << 21)
-#define LMODE_CMD1(x) ((x) << 8)
-#define LMODE_CMD0(x) (x)
-
-#define LRD_ADDR 0x4c
-#define LWR_ADDR 0x88
-#define LRD_RANGE 0x50
-#define LWR_RANGE 0x8c
-
-#define AXI_SLV_ADDR 0x54
-
-#define DMAC_RD_CFG 0x58
-#define DMAC_WR_CFG 0x94
-#define DMAC_CFG_PERIPH_EN BIT(31)
-#define DMAC_CFG_ALLFLUSH_EN BIT(30)
-#define DMAC_CFG_LASTFLUSH_EN BIT(29)
-#define DMAC_CFG_QE(x) (((x) + 1) << 16)
-#define DMAC_CFG_BURST_LEN(x) (((x) + 1) << 12)
-#define DMAC_CFG_BURST_SZ(x) ((x) << 8)
-#define DMAC_CFG_DIR_READ BIT(1)
-#define DMAC_CFG_START BIT(0)
-
-#define DMAC_RD_CNT 0x5c
-#define DMAC_WR_CNT 0x98
-
-#define SDMA_ADDR 0x60
-
-#define DMAM_CFG 0x64
-#define DMAM_CFG_START BIT(31)
-#define DMAM_CFG_CONT BIT(30)
-#define DMAM_CFG_SDMA_GAP(x) (fls((x) / 8192) << 2)
-#define DMAM_CFG_DIR_READ BIT(1)
-#define DMAM_CFG_EN BIT(0)
-
-#define DMAM_CNT 0x68
-
-#define LNR_TIMER_TH 0x6c
-
-#define RDM_CFG0 0x78
-#define RDM_CFG0_POLY(x) (x)
-
-#define RDM_CFG1 0x7c
-#define RDM_CFG1_RDM_EN BIT(31)
-#define RDM_CFG1_SEED(x) (x)
-
-#define LWR_SUSP_CTRL 0x90
-#define LWR_SUSP_CTRL_EN BIT(31)
-
-#define DMAS_CTRL 0x9c
-#define DMAS_CTRL_DIR_READ BIT(31)
-#define DMAS_CTRL_EN BIT(30)
-
-#define DATA_STROB 0xa0
-#define DATA_STROB_EDO_EN BIT(2)
-#define DATA_STROB_INV_POL BIT(1)
-#define DATA_STROB_DELAY_2CYC BIT(0)
-
-#define IDLY_CODE(x) (0xa4 + ((x) * 4))
-#define IDLY_CODE_VAL(x, v) ((v) << (((x) % 4) * 8))
-
-#define GPIO 0xc4
-#define GPIO_PT(x) BIT(3 + ((x) * 16))
-#define GPIO_RESET(x) BIT(2 + ((x) * 16))
-#define GPIO_HOLDB(x) BIT(1 + ((x) * 16))
-#define GPIO_WPB(x) BIT((x) * 16)
-
-#define HC_VER 0xd0
-
-#define HW_TEST(x) (0xe0 + ((x) * 4))
-
struct mxic_spi {
- struct clk *ps_clk;
- struct clk *send_clk;
- struct clk *send_dly_clk;
- void __iomem *regs;
+ struct mx25f0a_mfd *mfd;
u32 cur_speed_hz;
};
@@ -178,26 +23,26 @@ static int mxic_spi_clk_enable(struct mxic_spi *mxic)
{
int ret;
- ret = clk_prepare_enable(mxic->send_clk);
+ ret = clk_prepare_enable(mxic->mfd->send_clk);
if (ret)
return ret;
- ret = clk_prepare_enable(mxic->send_dly_clk);
+ ret = clk_prepare_enable(mxic->mfd->send_dly_clk);
if (ret)
goto err_send_dly_clk;
return ret;
err_send_dly_clk:
- clk_disable_unprepare(mxic->send_clk);
+ clk_disable_unprepare(mxic->mfd->send_clk);
return ret;
}
static void mxic_spi_clk_disable(struct mxic_spi *mxic)
{
- clk_disable_unprepare(mxic->send_clk);
- clk_disable_unprepare(mxic->send_dly_clk);
+ clk_disable_unprepare(mxic->mfd->send_clk);
+ clk_disable_unprepare(mxic->mfd->send_dly_clk);
}
static void mxic_spi_set_input_delay_dqs(struct mxic_spi *mxic, u8 idly_code)
@@ -206,23 +51,23 @@ static void mxic_spi_set_input_delay_dqs(struct mxic_spi *mxic, u8 idly_code)
IDLY_CODE_VAL(1, idly_code) |
IDLY_CODE_VAL(2, idly_code) |
IDLY_CODE_VAL(3, idly_code),
- mxic->regs + IDLY_CODE(0));
+ mxic->mfd->regs + IDLY_CODE(0));
writel(IDLY_CODE_VAL(4, idly_code) |
IDLY_CODE_VAL(5, idly_code) |
IDLY_CODE_VAL(6, idly_code) |
IDLY_CODE_VAL(7, idly_code),
- mxic->regs + IDLY_CODE(1));
+ mxic->mfd->regs + IDLY_CODE(1));
}
static int mxic_spi_clk_setup(struct mxic_spi *mxic, unsigned long freq)
{
int ret;
- ret = clk_set_rate(mxic->send_clk, freq);
+ ret = clk_set_rate(mxic->mfd->send_clk, freq);
if (ret)
return ret;
- ret = clk_set_rate(mxic->send_dly_clk, freq);
+ ret = clk_set_rate(mxic->mfd->send_dly_clk, freq);
if (ret)
return ret;
@@ -240,7 +85,7 @@ static int mxic_spi_clk_setup(struct mxic_spi *mxic, unsigned long freq)
* = 360 * freq * 1 sec / 1000000000
* = 9 * freq / 25000000
*/
- ret = clk_set_phase(mxic->send_dly_clk, 9 * freq / 25000000);
+ ret = clk_set_phase(mxic->mfd->send_dly_clk, 9 * freq / 25000000);
if (ret)
return ret;
@@ -270,14 +115,14 @@ static int mxic_spi_set_freq(struct mxic_spi *mxic, unsigned long freq)
static void mxic_spi_hw_init(struct mxic_spi *mxic)
{
- writel(0, mxic->regs + DATA_STROB);
- writel(INT_STS_ALL, mxic->regs + INT_STS_EN);
- writel(0, mxic->regs + HC_EN);
- writel(0, mxic->regs + LRD_CFG);
- writel(0, mxic->regs + LRD_CTRL);
+ writel(0, mxic->mfd->regs + DATA_STROB);
+ writel(INT_STS_ALL, mxic->mfd->regs + INT_STS_EN);
+ writel(0, mxic->mfd->regs + HC_EN);
+ writel(0, mxic->mfd->regs + LRD_CFG);
+ writel(0, mxic->mfd->regs + LRD_CTRL);
writel(HC_CFG_NIO(1) | HC_CFG_TYPE(0, HC_CFG_TYPE_SPI_NAND) |
HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN | HC_CFG_IDLE_SIO_LVL(1),
- mxic->regs + HC_CFG);
+ mxic->mfd->regs + HC_CFG);
}
static int mxic_spi_data_xfer(struct mxic_spi *mxic, const void *txbuf,
@@ -297,34 +142,35 @@ static int mxic_spi_data_xfer(struct mxic_spi *mxic, const void *txbuf,
if (txbuf)
memcpy(&data, txbuf + pos, nbytes);
- ret = readl_poll_timeout(mxic->regs + INT_STS, sts,
+ ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts,
sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
if (ret)
return ret;
- writel(data, mxic->regs + TXD(nbytes % 4));
+ writel(data, mxic->mfd->regs + TXD(nbytes % 4));
if (rxbuf) {
- ret = readl_poll_timeout(mxic->regs + INT_STS, sts,
+ ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts,
sts & INT_TX_EMPTY, 0,
USEC_PER_SEC);
if (ret)
return ret;
- ret = readl_poll_timeout(mxic->regs + INT_STS, sts,
+ ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts,
sts & INT_RX_NOT_EMPTY, 0,
USEC_PER_SEC);
if (ret)
return ret;
- data = readl(mxic->regs + RXD);
+ data = readl(mxic->mfd->regs + RXD);
data >>= (8 * (4 - nbytes));
memcpy(rxbuf + pos, &data, nbytes);
- WARN_ON(readl(mxic->regs + INT_STS) & INT_RX_NOT_EMPTY);
+ WARN_ON(readl(mxic->mfd->regs + INT_STS) &
+ INT_RX_NOT_EMPTY);
} else {
- readl(mxic->regs + RXD);
+ readl(mxic->mfd->regs + RXD);
}
- WARN_ON(readl(mxic->regs + INT_STS) & INT_RX_NOT_EMPTY);
+ WARN_ON(readl(mxic->mfd->regs + INT_STS) & INT_RX_NOT_EMPTY);
pos += nbytes;
}
@@ -370,8 +216,8 @@ static int mxic_spi_mem_exec_op(struct spi_mem *mem,
HC_CFG_TYPE(mem->spi->chip_select, HC_CFG_TYPE_SPI_NOR) |
HC_CFG_SLV_ACT(mem->spi->chip_select) | HC_CFG_IDLE_SIO_LVL(1) |
HC_CFG_MAN_CS_EN,
- mxic->regs + HC_CFG);
- writel(HC_EN_BIT, mxic->regs + HC_EN);
+ mxic->mfd->regs + HC_CFG);
+ writel(HC_EN_BIT, mxic->mfd->regs + HC_EN);
ss_ctrl = OP_CMD_BYTES(1) | OP_CMD_BUSW(fls(op->cmd.buswidth) - 1);
@@ -388,10 +234,10 @@ static int mxic_spi_mem_exec_op(struct spi_mem *mem,
ss_ctrl |= OP_READ;
}
- writel(ss_ctrl, mxic->regs + SS_CTRL(mem->spi->chip_select));
+ writel(ss_ctrl, mxic->mfd->regs + SS_CTRL(mem->spi->chip_select));
- writel(readl(mxic->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT,
- mxic->regs + HC_CFG);
+ writel(readl(mxic->mfd->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT,
+ mxic->mfd->regs + HC_CFG);
ret = mxic_spi_data_xfer(mxic, &op->cmd.opcode, NULL, 1);
if (ret)
@@ -416,9 +262,9 @@ static int mxic_spi_mem_exec_op(struct spi_mem *mem,
op->data.nbytes);
out:
- writel(readl(mxic->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT,
- mxic->regs + HC_CFG);
- writel(0, mxic->regs + HC_EN);
+ writel(readl(mxic->mfd->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT,
+ mxic->mfd->regs + HC_CFG);
+ writel(0, mxic->mfd->regs + HC_EN);
return ret;
}
@@ -433,15 +279,15 @@ static void mxic_spi_set_cs(struct spi_device *spi, bool lvl)
struct mxic_spi *mxic = spi_master_get_devdata(spi->master);
if (!lvl) {
- writel(readl(mxic->regs + HC_CFG) | HC_CFG_MAN_CS_EN,
- mxic->regs + HC_CFG);
- writel(HC_EN_BIT, mxic->regs + HC_EN);
- writel(readl(mxic->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT,
- mxic->regs + HC_CFG);
+ writel(readl(mxic->mfd->regs + HC_CFG) | HC_CFG_MAN_CS_EN,
+ mxic->mfd->regs + HC_CFG);
+ writel(HC_EN_BIT, mxic->mfd->regs + HC_EN);
+ writel(readl(mxic->mfd->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT,
+ mxic->mfd->regs + HC_CFG);
} else {
- writel(readl(mxic->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT,
- mxic->regs + HC_CFG);
- writel(0, mxic->regs + HC_EN);
+ writel(readl(mxic->mfd->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT,
+ mxic->mfd->regs + HC_CFG);
+ writel(0, mxic->mfd->regs + HC_EN);
}
}
@@ -479,7 +325,7 @@ static int mxic_spi_transfer_one(struct spi_master *master,
writel(OP_CMD_BYTES(1) | OP_CMD_BUSW(busw) |
OP_DATA_BUSW(busw) | (t->rx_buf ? OP_READ : 0),
- mxic->regs + SS_CTRL(0));
+ mxic->mfd->regs + SS_CTRL(0));
ret = mxic_spi_data_xfer(mxic, t->tx_buf, t->rx_buf, t->len);
if (ret)
@@ -497,7 +343,7 @@ static int __maybe_unused mxic_spi_runtime_suspend(struct device *dev)
struct mxic_spi *mxic = spi_master_get_devdata(master);
mxic_spi_clk_disable(mxic);
- clk_disable_unprepare(mxic->ps_clk);
+ clk_disable_unprepare(mxic->mfd->ps_clk);
return 0;
}
@@ -509,7 +355,7 @@ static int __maybe_unused mxic_spi_runtime_resume(struct device *dev)
struct mxic_spi *mxic = spi_master_get_devdata(master);
int ret;
- ret = clk_prepare_enable(mxic->ps_clk);
+ ret = clk_prepare_enable(mxic->mfd->ps_clk);
if (ret) {
dev_err(dev, "Cannot enable ps_clock.\n");
return ret;
@@ -525,8 +371,8 @@ static int __maybe_unused mxic_spi_runtime_resume(struct device *dev)
static int mxic_spi_probe(struct platform_device *pdev)
{
+ struct mx25f0a_mfd *mfd = dev_get_drvdata(pdev->dev.parent);
struct spi_master *master;
- struct resource *res;
struct mxic_spi *mxic;
int ret;
@@ -538,24 +384,8 @@ static int mxic_spi_probe(struct platform_device *pdev)
mxic = spi_master_get_devdata(master);
- master->dev.of_node = pdev->dev.of_node;
-
- mxic->ps_clk = devm_clk_get(&pdev->dev, "ps_clk");
- if (IS_ERR(mxic->ps_clk))
- return PTR_ERR(mxic->ps_clk);
-
- mxic->send_clk = devm_clk_get(&pdev->dev, "send_clk");
- if (IS_ERR(mxic->send_clk))
- return PTR_ERR(mxic->send_clk);
-
- mxic->send_dly_clk = devm_clk_get(&pdev->dev, "send_dly_clk");
- if (IS_ERR(mxic->send_dly_clk))
- return PTR_ERR(mxic->send_dly_clk);
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
- mxic->regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mxic->regs))
- return PTR_ERR(mxic->regs);
+ master->dev.of_node = pdev->dev.parent->of_node;
+ mxic->mfd = mfd;
pm_runtime_enable(&pdev->dev);
master->auto_runtime_pm = true;
@@ -597,18 +427,11 @@ static int mxic_spi_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id mxic_spi_of_ids[] = {
- { .compatible = "mxicy,mx25f0a-spi", },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, mxic_spi_of_ids);
-
static struct platform_driver mxic_spi_driver = {
.probe = mxic_spi_probe,
.remove = mxic_spi_remove,
.driver = {
.name = "mxic-spi",
- .of_match_table = mxic_spi_of_ids,
.pm = &mxic_spi_dev_pm_ops,
},
};
--
1.9.1