diff options
| -rw-r--r-- | drivers/parport/parport_pc.c | 20 | ||||
| -rw-r--r-- | include/uapi/linux/parport.h | 3 |
2 files changed, 19 insertions, 4 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index 88e125e36230..3bacbaf16f42 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -305,9 +305,15 @@ static size_t parport_pc_epp_read_data(struct parport *port, void *buf, } return got; } - if ((flags & PARPORT_EPP_FAST) && (length > 1)) { - if (!(((long)buf | length) & 0x03)) + if ((length > 1) && ((flags & PARPORT_EPP_FAST_32) + || flags & PARPORT_EPP_FAST_16 + || flags & PARPORT_EPP_FAST_8)) { + if ((flags & PARPORT_EPP_FAST_32) + && !(((long)buf | length) & 0x03)) insl(EPPDATA(port), buf, (length >> 2)); + else if ((flags & PARPORT_EPP_FAST_16) + && !(((long)buf | length) & 0x01)) + insw(EPPDATA(port), buf, length >> 1); else insb(EPPDATA(port), buf, length); if (inb(STATUS(port)) & 0x01) { @@ -334,9 +340,15 @@ static size_t parport_pc_epp_write_data(struct parport *port, const void *buf, { size_t written = 0; - if ((flags & PARPORT_EPP_FAST) && (length > 1)) { - if (!(((long)buf | length) & 0x03)) + if ((length > 1) && ((flags & PARPORT_EPP_FAST_32) + || flags & PARPORT_EPP_FAST_16 + || flags & PARPORT_EPP_FAST_8)) { + if ((flags & PARPORT_EPP_FAST_32) + && !(((long)buf | length) & 0x03)) outsl(EPPDATA(port), buf, (length >> 2)); + else if ((flags & PARPORT_EPP_FAST_16) + && !(((long)buf | length) & 0x01)) + outsw(EPPDATA(port), buf, length >> 1); else outsb(EPPDATA(port), buf, length); if (inb(STATUS(port)) & 0x01) { diff --git a/include/uapi/linux/parport.h b/include/uapi/linux/parport.h index f41388f88dc3..fe93e41fc205 100644 --- a/include/uapi/linux/parport.h +++ b/include/uapi/linux/parport.h @@ -90,6 +90,9 @@ typedef enum { /* Flags for block transfer operations. */ #define PARPORT_EPP_FAST (1<<0) /* Unreliable counts. */ #define PARPORT_W91284PIC (1<<1) /* have a Warp9 w91284pic in the device */ +#define PARPORT_EPP_FAST_32 PARPORT_EPP_FAST /* 32-bit EPP transfers */ +#define PARPORT_EPP_FAST_16 (1<<2) /* 16-bit EPP transfers */ +#define PARPORT_EPP_FAST_8 (1<<3) /* 8-bit EPP transfers */ /* The rest is for the kernel only */ #endif /* _UAPI_PARPORT_H_ */ |