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Simplify the SPI driver.

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This commit is contained in:
Serge Vakulenko
2015-09-20 22:01:19 -07:00
parent a36504720c
commit 80ab2d4721
9 changed files with 321 additions and 524 deletions
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sys/include/spi.h
+45 -1
View File
@@ -12,6 +12,9 @@
#include <sys/ioctl.h>
/*
* User-level interface to the SPI port.
*/
#define SPICTL_SETMODE _IO ('p', 0) /* set SPI mode */
#define SPICTL_SETRATE _IO ('p', 1) /* set clock rate, kHz */
#define SPICTL_SETSELPIN _IO ('p', 2) /* set select pin */
@@ -35,13 +38,54 @@
#ifdef KERNEL
#include "conf.h"
extern const struct devspec spidevs[];
/*
* Kernel-level interface to the SPI port.
*/
struct spiio {
struct spireg *bus;
unsigned int *cs_tris;
unsigned int cs_pin;
unsigned int baud;
unsigned int mode;
};
extern int spi_setup(struct spiio *io, int channel, unsigned int *tris, unsigned int pin);
extern void spi_set_cspin(struct spiio *io, unsigned int *tris, unsigned int pin);
extern void spi_select(struct spiio *io);
extern void spi_deselect(struct spiio *io);
extern void spi_set(struct spiio *io, unsigned int set);
extern void spi_clr(struct spiio *io, unsigned int set);
extern unsigned int spi_status(struct spiio *io);
extern unsigned char spi_transfer(struct spiio *io, unsigned char data);
extern void spi_bulk_write_32_be(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_write_32(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_write_16(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_write(struct spiio *io, unsigned int len, unsigned char *data);
extern void spi_bulk_read_32_be(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_read_32(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_read_16(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_read(struct spiio *io, unsigned int len, unsigned char *data);
extern void spi_bulk_rw_32_be(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_rw_32(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_rw_16(struct spiio *io, unsigned int len, char *data);
extern void spi_bulk_rw(struct spiio *io, unsigned int len, unsigned char *data);
extern void spi_brg(struct spiio *io, unsigned int baud);
extern char *spi_name(struct spiio *io);
extern char spi_csname(struct spiio *io);
extern int spi_cspin(struct spiio *io);
extern unsigned int spi_get_brg(struct spiio *io);
/*
* Routines of the SPI device driver.
*/
int spidev_open (dev_t dev, int flag, int mode);
int spidev_close (dev_t dev, int flag, int mode);
int spidev_read (dev_t dev, struct uio *uio, int flag);
int spidev_write (dev_t dev, struct uio *uio, int flag);
int spidev_ioctl (dev_t dev, u_int cmd, caddr_t addr, int flag);
extern const struct devspec spidevs[];
#endif
#endif
sys/include/spi_bus.h
-62
View File
@@ -1,62 +0,0 @@
#ifndef _SPI_BUS_H
#define _SPI_BUS_H
#ifdef KERNEL
struct spireg {
volatile unsigned con; /* Control */
volatile unsigned conclr;
volatile unsigned conset;
volatile unsigned coninv;
volatile unsigned stat; /* Status */
volatile unsigned statclr;
volatile unsigned statset;
volatile unsigned statinv;
volatile unsigned buf; /* Transmit and receive buffer */
volatile unsigned unused1;
volatile unsigned unused2;
volatile unsigned unused3;
volatile unsigned brg; /* Baud rate generator */
volatile unsigned brgclr;
volatile unsigned brgset;
volatile unsigned brginv;
};
struct spi_dev {
struct spireg *bus;
unsigned int *cs_tris;
unsigned int cs_pin;
unsigned int baud;
unsigned int mode;
};
extern int spi_open(unsigned int bus, unsigned int *tris, unsigned int pin);
extern void spi_close(int dno);
extern void spi_set_cspin(int dno, unsigned int *tris, unsigned int pin);
extern void spi_select(int dno);
extern void spi_deselect(int dno);
extern void spi_set(int dno, unsigned int set);
extern void spi_clr(int dno, unsigned int set);
extern unsigned int spi_status(int dno);
extern unsigned char spi_transfer(int dno, unsigned char data);
extern void spi_bulk_write_32_be(int dno, unsigned int len, char *data);
extern void spi_bulk_write_32(int dno, unsigned int len, char *data);
extern void spi_bulk_write_16(int dno, unsigned int len, char *data);
extern void spi_bulk_write(int dno, unsigned int len, unsigned char *data);
extern void spi_bulk_read_32_be(int dno, unsigned int len, char *data);
extern void spi_bulk_read_32(int dno, unsigned int len, char *data);
extern void spi_bulk_read_16(int dno, unsigned int len, char *data);
extern void spi_bulk_read(int dno, unsigned int len, unsigned char *data);
extern void spi_bulk_rw_32_be(int dno, unsigned int len, char *data);
extern void spi_bulk_rw_32(int dno, unsigned int len, char *data);
extern void spi_bulk_rw_16(int dno, unsigned int len, char *data);
extern void spi_bulk_rw(int dno, unsigned int len, unsigned char *data);
extern void spi_brg(int dno, unsigned int baud);
extern char *spi_name(int dno);
extern char spi_csname(int dno);
extern int spi_cspin(int dno);
extern unsigned int spi_get_brg(int dno);
#endif
#endif