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New SPI IOCTL modi - R,W,RB,WB,RWB

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This commit is contained in:
igor-m
2014-04-17 19:49:40 +02:00
parent 249b5716bb
commit 4783836659
2 changed files with 100 additions and 3 deletions
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13
sys/include/spi.h
View File

@@ -15,10 +15,23 @@
#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 */
#define SPICTL_IO8(n) _ION('p', 3, n) /* transfer n*8 bits */
#define SPICTL_IO16(n) _ION('p', 4, n) /* transfer n*16 bits */
#define SPICTL_IO32(n) _ION('p', 5, n) /* transfer n*32 bits */
#define SPICTL_IO8R(n) _ION('p', 6, n) /* transfer R n*8 bits */
#define SPICTL_IO16R(n) _ION('p', 7, n) /* transfer R n*16 bits */
#define SPICTL_IO32R(n) _ION('p', 8, n) /* transfer R n*32 bits */
#define SPICTL_IO8W(n) _ION('p', 9, n) /* transfer W n*8 bits */
#define SPICTL_IO16W(n) _ION('p', 10, n) /* transfer W n*16 bits */
#define SPICTL_IO32W(n) _ION('p', 11, n) /* transfer W n*32 bits */
#define SPICTL_IO32B(n) _ION('p', 12, n) /* transfer BE n*32 bits */
#define SPICTL_IO32RB(n) _ION('p', 13, n) /* transfer RBE n*32 bits */
#define SPICTL_IO32WB(n) _ION('p', 14, n) /* transfer WBE n*32 bits */
#ifdef KERNEL
#include "conf.h"

90
sys/pic32/spi.c
View File

@@ -101,9 +101,18 @@ int spidev_write (dev_t dev, struct uio *uio, int flag)
* - SPICTL_SETMODE - set clock polarity and phase
* - SPICTL_SETRATE - set data rate in kHz
* - SPICTL_SETSELPIN - set select pin
* - SPICTL_IO8(n) - n*8 bit transaction
* - SPICTL_IO16(n) - n*16 bit transaction
* - SPICTL_IO32(n) - n*32 bit transaction
* - SPICTL_IO8(n) - n*8 bit RW transaction
* - SPICTL_IO16(n) - n*16 bit RW transaction
* - SPICTL_IO32(n) - n*32 bit RW transaction
* - SPICTL_IO8R(n) - n*8 bit R transaction
* - SPICTL_IO16R(n) - n*16 bit R transaction
* - SPICTL_IO32R(n) - n*32 bit R transaction
* - SPICTL_IO8W(n) - n*8 bit W transaction
* - SPICTL_IO16W(n) - n*16 bit W transaction
* - SPICTL_IO32W(n) - n*32 bit W transaction
* - SPICTL_IO32RB(n) - n*32 bit RB transaction (B - swaps byte's order)
* - SPICTL_IO32WB(n) - n*32 bit WB transaction
* - SPICTL_IO32B(n) - n*32 bit B transaction
*/
int spidev_ioctl (dev_t dev, u_int cmd, caddr_t addr, int flag)
{
@@ -173,6 +182,81 @@ int spidev_ioctl (dev_t dev, u_int cmd, caddr_t addr, int flag)
return EFAULT;
spi_bulk_rw_32(spi_fd[channel], nelem<<2, (char *)addr);
break;
// IM: added R and W and BE modes
case SPICTL_IO8R(0): /* transfer n*8 bits */
spi_select(spi_fd[channel]);
nelem = (cmd >> 16) & IOCPARM_MASK;
if (baduaddr (addr) || baduaddr (addr + nelem - 1))
return EFAULT;
spi_bulk_read(spi_fd[channel], nelem, cval);
spi_deselect(spi_fd[channel]);
break;
case SPICTL_IO16R(0): /* transfer n*16 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 1) ||
baduaddr (addr) || baduaddr (addr + nelem*2 - 1))
return EFAULT;
spi_bulk_read_16(spi_fd[channel], nelem<<1, (char *)addr);
break;
case SPICTL_IO32R(0): /* transfer n*32 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 3) ||
baduaddr (addr) || baduaddr (addr + nelem*4 - 1))
return EFAULT;
spi_bulk_read_32(spi_fd[channel], nelem<<2, (char *)addr);
break;
case SPICTL_IO8W(0): /* transfer n*8 bits */
spi_select(spi_fd[channel]);
nelem = (cmd >> 16) & IOCPARM_MASK;
if (baduaddr (addr) || baduaddr (addr + nelem - 1))
return EFAULT;
spi_bulk_write(spi_fd[channel], nelem, cval);
spi_deselect(spi_fd[channel]);
break;
case SPICTL_IO16W(0): /* transfer n*16 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 1) ||
baduaddr (addr) || baduaddr (addr + nelem*2 - 1))
return EFAULT;
spi_bulk_write_16(spi_fd[channel], nelem<<1, (char *)addr);
break;
case SPICTL_IO32W(0): /* transfer n*32 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 3) ||
baduaddr (addr) || baduaddr (addr + nelem*4 - 1))
return EFAULT;
spi_bulk_write_32(spi_fd[channel], nelem<<2, (char *)addr);
break;
case SPICTL_IO32RB(0): /* transfer n*32 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 3) ||
baduaddr (addr) || baduaddr (addr + nelem*4 - 1))
return EFAULT;
spi_bulk_read_32_be(spi_fd[channel], nelem<<2, (char *)addr);
break;
case SPICTL_IO32WB(0): /* transfer n*32 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 3) ||
baduaddr (addr) || baduaddr (addr + nelem*4 - 1))
return EFAULT;
spi_bulk_write_32_be(spi_fd[channel], nelem<<2, (char *)addr);
break;
case SPICTL_IO32B(0): /* transfer n*32 bits */
nelem = (cmd >> 16) & IOCPARM_MASK;
if (((unsigned) addr & 3) ||
baduaddr (addr) || baduaddr (addr + nelem*4 - 1))
return EFAULT;
spi_bulk_write_32_be(spi_fd[channel], nelem<<2, (char *)addr);
break;
//
}
return 0;
}