Release 4.12 drivers/spi/spi-dw.h
#ifndef DW_SPI_HEADER_H
#define DW_SPI_HEADER_H
#include <linux/io.h>
#include <linux/scatterlist.h>
#include <linux/gpio.h>
/* Register offsets */
#define DW_SPI_CTRL0 0x00
#define DW_SPI_CTRL1 0x04
#define DW_SPI_SSIENR 0x08
#define DW_SPI_MWCR 0x0c
#define DW_SPI_SER 0x10
#define DW_SPI_BAUDR 0x14
#define DW_SPI_TXFLTR 0x18
#define DW_SPI_RXFLTR 0x1c
#define DW_SPI_TXFLR 0x20
#define DW_SPI_RXFLR 0x24
#define DW_SPI_SR 0x28
#define DW_SPI_IMR 0x2c
#define DW_SPI_ISR 0x30
#define DW_SPI_RISR 0x34
#define DW_SPI_TXOICR 0x38
#define DW_SPI_RXOICR 0x3c
#define DW_SPI_RXUICR 0x40
#define DW_SPI_MSTICR 0x44
#define DW_SPI_ICR 0x48
#define DW_SPI_DMACR 0x4c
#define DW_SPI_DMATDLR 0x50
#define DW_SPI_DMARDLR 0x54
#define DW_SPI_IDR 0x58
#define DW_SPI_VERSION 0x5c
#define DW_SPI_DR 0x60
/* Bit fields in CTRLR0 */
#define SPI_DFS_OFFSET 0
#define SPI_FRF_OFFSET 4
#define SPI_FRF_SPI 0x0
#define SPI_FRF_SSP 0x1
#define SPI_FRF_MICROWIRE 0x2
#define SPI_FRF_RESV 0x3
#define SPI_MODE_OFFSET 6
#define SPI_SCPH_OFFSET 6
#define SPI_SCOL_OFFSET 7
#define SPI_TMOD_OFFSET 8
#define SPI_TMOD_MASK (0x3 << SPI_TMOD_OFFSET)
#define SPI_TMOD_TR 0x0
/* xmit & recv */
#define SPI_TMOD_TO 0x1
/* xmit only */
#define SPI_TMOD_RO 0x2
/* recv only */
#define SPI_TMOD_EPROMREAD 0x3
/* eeprom read mode */
#define SPI_SLVOE_OFFSET 10
#define SPI_SRL_OFFSET 11
#define SPI_CFS_OFFSET 12
/* Bit fields in SR, 7 bits */
#define SR_MASK 0x7f
/* cover 7 bits */
#define SR_BUSY (1 << 0)
#define SR_TF_NOT_FULL (1 << 1)
#define SR_TF_EMPT (1 << 2)
#define SR_RF_NOT_EMPT (1 << 3)
#define SR_RF_FULL (1 << 4)
#define SR_TX_ERR (1 << 5)
#define SR_DCOL (1 << 6)
/* Bit fields in ISR, IMR, RISR, 7 bits */
#define SPI_INT_TXEI (1 << 0)
#define SPI_INT_TXOI (1 << 1)
#define SPI_INT_RXUI (1 << 2)
#define SPI_INT_RXOI (1 << 3)
#define SPI_INT_RXFI (1 << 4)
#define SPI_INT_MSTI (1 << 5)
/* Bit fields in DMACR */
#define SPI_DMA_RDMAE (1 << 0)
#define SPI_DMA_TDMAE (1 << 1)
/* TX RX interrupt level threshold, max can be 256 */
#define SPI_INT_THRESHOLD 32
enum dw_ssi_type {
SSI_MOTO_SPI = 0,
SSI_TI_SSP,
SSI_NS_MICROWIRE,
};
struct dw_spi;
struct dw_spi_dma_ops {
int (*dma_init)(struct dw_spi *dws);
void (*dma_exit)(struct dw_spi *dws);
int (*dma_setup)(struct dw_spi *dws, struct spi_transfer *xfer);
bool (*can_dma)(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *xfer);
int (*dma_transfer)(struct dw_spi *dws, struct spi_transfer *xfer);
void (*dma_stop)(struct dw_spi *dws);
};
struct dw_spi {
struct spi_master *master;
enum dw_ssi_type type;
void __iomem *regs;
unsigned long paddr;
int irq;
u32 fifo_len; /* depth of the FIFO buffer */
u32 max_freq; /* max bus freq supported */
u32 reg_io_width; /* DR I/O width in bytes */
u16 bus_num;
u16 num_cs; /* supported slave numbers */
/* Current message transfer state info */
size_t len;
void *tx;
void *tx_end;
void *rx;
void *rx_end;
int dma_mapped;
u8 n_bytes; /* current is a 1/2 bytes op */
u32 dma_width;
irqreturn_t (*transfer_handler)(struct dw_spi *dws);
u32 current_freq; /* frequency in hz */
/* DMA info */
int dma_inited;
struct dma_chan *txchan;
struct dma_chan *rxchan;
unsigned long dma_chan_busy;
dma_addr_t dma_addr; /* phy address of the Data register */
const struct dw_spi_dma_ops *dma_ops;
void *dma_tx;
void *dma_rx;
/* Bus interface info */
void *priv;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
};
static inline u32 dw_readl(struct dw_spi *dws, u32 offset)
{
return __raw_readl(dws->regs + offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| H Hartley Sweeten | 21 | 84.00% | 1 | 50.00% |
| Feng Tang | 4 | 16.00% | 1 | 50.00% |
| Total | 25 | 100.00% | 2 | 100.00% |
static inline u16 dw_readw(struct dw_spi *dws, u32 offset)
{
return __raw_readw(dws->regs + offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael van der Westhuizen | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val)
{
__raw_writel(val, dws->regs + offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| H Hartley Sweeten | 23 | 79.31% | 1 | 50.00% |
| Feng Tang | 6 | 20.69% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val)
{
__raw_writew(val, dws->regs + offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael van der Westhuizen | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
static inline u32 dw_read_io_reg(struct dw_spi *dws, u32 offset)
{
switch (dws->reg_io_width) {
case 2:
return dw_readw(dws, offset);
case 4:
default:
return dw_readl(dws, offset);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael van der Westhuizen | 46 | 100.00% | 1 | 100.00% |
| Total | 46 | 100.00% | 1 | 100.00% |
static inline void dw_write_io_reg(struct dw_spi *dws, u32 offset, u32 val)
{
switch (dws->reg_io_width) {
case 2:
dw_writew(dws, offset, val);
break;
case 4:
default:
dw_writel(dws, offset, val);
break;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael van der Westhuizen | 53 | 100.00% | 1 | 100.00% |
| Total | 53 | 100.00% | 1 | 100.00% |
static inline void spi_enable_chip(struct dw_spi *dws, int enable)
{
dw_writel(dws, DW_SPI_SSIENR, (enable ? 1 : 0));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Feng Tang | 29 | 96.67% | 1 | 50.00% |
| H Hartley Sweeten | 1 | 3.33% | 1 | 50.00% |
| Total | 30 | 100.00% | 2 | 100.00% |
static inline void spi_set_clk(struct dw_spi *dws, u16 div)
{
dw_writel(dws, DW_SPI_BAUDR, div);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Feng Tang | 23 | 95.83% | 1 | 50.00% |
| H Hartley Sweeten | 1 | 4.17% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
/* Disable IRQ bits */
static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
{
u32 new_mask;
new_mask = dw_readl(dws, DW_SPI_IMR) & ~mask;
dw_writel(dws, DW_SPI_IMR, new_mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Feng Tang | 37 | 94.87% | 1 | 50.00% |
| H Hartley Sweeten | 2 | 5.13% | 1 | 50.00% |
| Total | 39 | 100.00% | 2 | 100.00% |
/* Enable IRQ bits */
static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
{
u32 new_mask;
new_mask = dw_readl(dws, DW_SPI_IMR) | mask;
dw_writel(dws, DW_SPI_IMR, new_mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Feng Tang | 36 | 94.74% | 1 | 50.00% |
| H Hartley Sweeten | 2 | 5.26% | 1 | 50.00% |
| Total | 38 | 100.00% | 2 | 100.00% |
/*
* This does disable the SPI controller, interrupts, and re-enable the
* controller back. Transmit and receive FIFO buffers are cleared when the
* device is disabled.
*/
static inline void spi_reset_chip(struct dw_spi *dws)
{
spi_enable_chip(dws, 0);
spi_mask_intr(dws, 0xff);
spi_enable_chip(dws, 1);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Shevchenko | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
static inline void spi_shutdown_chip(struct dw_spi *dws)
{
spi_enable_chip(dws, 0);
spi_set_clk(dws, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Shevchenko | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
/*
* Each SPI slave device to work with dw_api controller should
* has such a structure claiming its working mode (poll or PIO/DMA),
* which can be save in the "controller_data" member of the
* struct spi_device.
*/
struct dw_spi_chip {
u8 poll_mode; /* 1 for controller polling mode */
u8 type; /* SPI/SSP/MicroWire */
void (*cs_control)(u32 command);
};
extern int dw_spi_add_host(struct device *dev, struct dw_spi *dws);
extern void dw_spi_remove_host(struct dw_spi *dws);
extern int dw_spi_suspend_host(struct dw_spi *dws);
extern int dw_spi_resume_host(struct dw_spi *dws);
/* platform related setup */
extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */
#endif /* DW_SPI_HEADER_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Feng Tang | 542 | 53.98% | 4 | 19.05% |
| Michael van der Westhuizen | 157 | 15.64% | 1 | 4.76% |
| H Hartley Sweeten | 151 | 15.04% | 1 | 4.76% |
| Andy Shevchenko | 137 | 13.65% | 9 | 42.86% |
| Baruch Siach | 8 | 0.80% | 2 | 9.52% |
| Matthias Seidel | 4 | 0.40% | 1 | 4.76% |
| Jiri Slaby | 3 | 0.30% | 1 | 4.76% |
| Lucas De Marchi | 1 | 0.10% | 1 | 4.76% |
| Julia Lawall | 1 | 0.10% | 1 | 4.76% |
| Total | 1004 | 100.00% | 21 | 100.00% |
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