diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-dw-core.c | 31 | ||||
| -rw-r--r-- | drivers/spi/spi-dw.h | 64 |
2 files changed, 50 insertions, 45 deletions
diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c index 57bbffe6d6f9..b9f809989fda 100644 --- a/drivers/spi/spi-dw-core.c +++ b/drivers/spi/spi-dw-core.c @@ -5,6 +5,7 @@ * Copyright (c) 2009, Intel Corporation. */ +#include <linux/bitfield.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/module.h> @@ -254,7 +255,7 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id) { struct spi_controller *master = dev_id; struct dw_spi *dws = spi_controller_get_devdata(master); - u16 irq_status = dw_readl(dws, DW_SPI_ISR) & 0x3f; + u16 irq_status = dw_readl(dws, DW_SPI_ISR) & DW_SPI_INT_MASK; if (!irq_status) return IRQ_NONE; @@ -273,32 +274,38 @@ static u32 dw_spi_prepare_cr0(struct dw_spi *dws, struct spi_device *spi) if (!(dws->caps & DW_SPI_CAP_DWC_HSSI)) { /* CTRLR0[ 5: 4] Frame Format */ - cr0 |= DW_SPI_CTRLR0_FRF_MOTO_SPI << DW_PSSI_CTRLR0_FRF_OFFSET; + cr0 |= FIELD_PREP(DW_PSSI_CTRLR0_FRF_MASK, DW_SPI_CTRLR0_FRF_MOTO_SPI); /* * SPI mode (SCPOL|SCPH) * CTRLR0[ 6] Serial Clock Phase * CTRLR0[ 7] Serial Clock Polarity */ - cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DW_PSSI_CTRLR0_SCOL_OFFSET; - cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DW_PSSI_CTRLR0_SCPH_OFFSET; + if (spi->mode & SPI_CPOL) + cr0 |= DW_PSSI_CTRLR0_SCPOL; + if (spi->mode & SPI_CPHA) + cr0 |= DW_PSSI_CTRLR0_SCPHA; /* CTRLR0[11] Shift Register Loop */ - cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DW_PSSI_CTRLR0_SRL_OFFSET; + if (spi->mode & SPI_LOOP) + cr0 |= DW_PSSI_CTRLR0_SRL; } else { /* CTRLR0[ 7: 6] Frame Format */ - cr0 |= DW_SPI_CTRLR0_FRF_MOTO_SPI << DW_HSSI_CTRLR0_FRF_OFFSET; + cr0 |= FIELD_PREP(DW_HSSI_CTRLR0_FRF_MASK, DW_SPI_CTRLR0_FRF_MOTO_SPI); /* * SPI mode (SCPOL|SCPH) * CTRLR0[ 8] Serial Clock Phase * CTRLR0[ 9] Serial Clock Polarity */ - cr0 |= ((spi->mode & SPI_CPOL) ? 1 : 0) << DW_HSSI_CTRLR0_SCPOL_OFFSET; - cr0 |= ((spi->mode & SPI_CPHA) ? 1 : 0) << DW_HSSI_CTRLR0_SCPH_OFFSET; + if (spi->mode & SPI_CPOL) + cr0 |= DW_HSSI_CTRLR0_SCPOL; + if (spi->mode & SPI_CPHA) + cr0 |= DW_HSSI_CTRLR0_SCPHA; /* CTRLR0[13] Shift Register Loop */ - cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DW_HSSI_CTRLR0_SRL_OFFSET; + if (spi->mode & SPI_LOOP) + cr0 |= DW_HSSI_CTRLR0_SRL; if (dws->caps & DW_SPI_CAP_KEEMBAY_MST) cr0 |= DW_HSSI_CTRLR0_KEEMBAY_MST; @@ -320,10 +327,10 @@ void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi, if (!(dws->caps & DW_SPI_CAP_DWC_HSSI)) /* CTRLR0[ 9:8] Transfer Mode */ - cr0 |= cfg->tmode << DW_PSSI_CTRLR0_TMOD_OFFSET; + cr0 |= FIELD_PREP(DW_PSSI_CTRLR0_TMOD_MASK, cfg->tmode); else /* CTRLR0[11:10] Transfer Mode */ - cr0 |= cfg->tmode << DW_HSSI_CTRLR0_TMOD_OFFSET; + cr0 |= FIELD_PREP(DW_HSSI_CTRLR0_TMOD_MASK, cfg->tmode); dw_writel(dws, DW_SPI_CTRLR0, cr0); @@ -850,7 +857,7 @@ static void dw_spi_hw_init(struct device *dev, struct dw_spi *dws) if (!(cr0 & DW_PSSI_CTRLR0_DFS_MASK)) { dws->caps |= DW_SPI_CAP_DFS32; - dws->dfs_offset = DW_PSSI_CTRLR0_DFS32_OFFSET; + dws->dfs_offset = __bf_shf(DW_PSSI_CTRLR0_DFS32_MASK); dev_dbg(dev, "Detected 32-bits max data frame size\n"); } } else { diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 893b78c43a50..634085eadad1 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -41,39 +41,36 @@ #define DW_SPI_CS_OVERRIDE 0xf4 /* Bit fields in CTRLR0 (DWC APB SSI) */ -#define DW_PSSI_CTRLR0_DFS_OFFSET 0 #define DW_PSSI_CTRLR0_DFS_MASK GENMASK(3, 0) -#define DW_PSSI_CTRLR0_DFS32_OFFSET 16 +#define DW_PSSI_CTRLR0_DFS32_MASK GENMASK(20, 16) -#define DW_PSSI_CTRLR0_FRF_OFFSET 4 +#define DW_PSSI_CTRLR0_FRF_MASK GENMASK(5, 4) #define DW_SPI_CTRLR0_FRF_MOTO_SPI 0x0 #define DW_SPI_CTRLR0_FRF_TI_SSP 0x1 #define DW_SPI_CTRLR0_FRF_NS_MICROWIRE 0x2 #define DW_SPI_CTRLR0_FRF_RESV 0x3 -#define DW_PSSI_CTRLR0_MODE_OFFSET 6 -#define DW_PSSI_CTRLR0_SCPH_OFFSET 6 -#define DW_PSSI_CTRLR0_SCOL_OFFSET 7 +#define DW_PSSI_CTRLR0_MODE_MASK GENMASK(7, 6) +#define DW_PSSI_CTRLR0_SCPHA BIT(6) +#define DW_PSSI_CTRLR0_SCPOL BIT(7) -#define DW_PSSI_CTRLR0_TMOD_OFFSET 8 -#define DW_PSSI_CTRLR0_TMOD_MASK (0x3 << DW_PSSI_CTRLR0_TMOD_OFFSET) +#define DW_PSSI_CTRLR0_TMOD_MASK GENMASK(9, 8) #define DW_SPI_CTRLR0_TMOD_TR 0x0 /* xmit & recv */ #define DW_SPI_CTRLR0_TMOD_TO 0x1 /* xmit only */ #define DW_SPI_CTRLR0_TMOD_RO 0x2 /* recv only */ #define DW_SPI_CTRLR0_TMOD_EPROMREAD 0x3 /* eeprom read mode */ -#define DW_PSSI_CTRLR0_SLVOE_OFFSET 10 -#define DW_PSSI_CTRLR0_SRL_OFFSET 11 -#define DW_PSSI_CTRLR0_CFS_OFFSET 12 +#define DW_PSSI_CTRLR0_SLV_OE BIT(10) +#define DW_PSSI_CTRLR0_SRL BIT(11) +#define DW_PSSI_CTRLR0_CFS BIT(12) /* Bit fields in CTRLR0 (DWC SSI with AHB interface) */ -#define DW_HSSI_CTRLR0_SRL_OFFSET 13 -#define DW_HSSI_CTRLR0_TMOD_OFFSET 10 +#define DW_HSSI_CTRLR0_DFS_MASK GENMASK(4, 0) +#define DW_HSSI_CTRLR0_FRF_MASK GENMASK(7, 6) +#define DW_HSSI_CTRLR0_SCPHA BIT(8) +#define DW_HSSI_CTRLR0_SCPOL BIT(9) #define DW_HSSI_CTRLR0_TMOD_MASK GENMASK(11, 10) -#define DW_HSSI_CTRLR0_SCPOL_OFFSET 9 -#define DW_HSSI_CTRLR0_SCPH_OFFSET 8 -#define DW_HSSI_CTRLR0_FRF_OFFSET 6 -#define DW_HSSI_CTRLR0_DFS_OFFSET 0 +#define DW_HSSI_CTRLR0_SRL BIT(13) /* * For Keem Bay, CTRLR0[31] is used to select controller mode. @@ -86,26 +83,27 @@ #define DW_SPI_NDF_MASK GENMASK(15, 0) /* Bit fields in SR, 7 bits */ -#define DW_SPI_SR_MASK 0x7f /* cover 7 bits */ -#define DW_SPI_SR_BUSY (1 << 0) -#define DW_SPI_SR_TF_NOT_FULL (1 << 1) -#define DW_SPI_SR_TF_EMPT (1 << 2) -#define DW_SPI_SR_RF_NOT_EMPT (1 << 3) -#define DW_SPI_SR_RF_FULL (1 << 4) -#define DW_SPI_SR_TX_ERR (1 << 5) -#define DW_SPI_SR_DCOL (1 << 6) +#define DW_SPI_SR_MASK GENMASK(6, 0) +#define DW_SPI_SR_BUSY BIT(0) +#define DW_SPI_SR_TF_NOT_FULL BIT(1) +#define DW_SPI_SR_TF_EMPT BIT(2) +#define DW_SPI_SR_RF_NOT_EMPT BIT(3) +#define DW_SPI_SR_RF_FULL BIT(4) +#define DW_SPI_SR_TX_ERR BIT(5) +#define DW_SPI_SR_DCOL BIT(6) /* Bit fields in ISR, IMR, RISR, 7 bits */ -#define DW_SPI_INT_TXEI (1 << 0) -#define DW_SPI_INT_TXOI (1 << 1) -#define DW_SPI_INT_RXUI (1 << 2) -#define DW_SPI_INT_RXOI (1 << 3) -#define DW_SPI_INT_RXFI (1 << 4) -#define DW_SPI_INT_MSTI (1 << 5) +#define DW_SPI_INT_MASK GENMASK(5, 0) +#define DW_SPI_INT_TXEI BIT(0) +#define DW_SPI_INT_TXOI BIT(1) +#define DW_SPI_INT_RXUI BIT(2) +#define DW_SPI_INT_RXOI BIT(3) +#define DW_SPI_INT_RXFI BIT(4) +#define DW_SPI_INT_MSTI BIT(5) /* Bit fields in DMACR */ -#define DW_SPI_DMACR_RDMAE (1 << 0) -#define DW_SPI_DMACR_TDMAE (1 << 1) +#define DW_SPI_DMACR_RDMAE BIT(0) +#define DW_SPI_DMACR_TDMAE BIT(1) /* Mem/DMA operations helpers */ #define DW_SPI_WAIT_RETRIES 5 |