diff options
| author | James Bottomley <James.Bottomley@steeleye.com> | 2005-11-29 16:24:52 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-12-16 09:51:01 -0800 |
| commit | 8f23d475581adac949315e3339421e12554932c9 (patch) | |
| tree | 30e68e2f1f48b39e0dd0da382d1297d321f817f9 /drivers/scsi | |
| parent | ef72582e7a02e1069c6e6bf5eecf6f388b1467c6 (diff) | |
[SCSI] 53c700: update endian processing macros
This update now allows this driver to be used on big endian bus
machines that aren't parisc. To do that, the driver must set a
CONFIG_53C700_BE_BUS in Kconfig to compile the right macro versions.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/53c700.h | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/scsi/53c700.h b/drivers/scsi/53c700.h index 362d78483d0..a8c83bb0363 100644 --- a/drivers/scsi/53c700.h +++ b/drivers/scsi/53c700.h @@ -238,21 +238,23 @@ struct NCR_700_Host_Parameters { #ifdef CONFIG_53C700_LE_ON_BE #define bE (hostdata->force_le_on_be ? 0 : 3) #define bSWAP (hostdata->force_le_on_be) -/* This is terrible, but there's no raw version of ioread32. That means - * that on a be board we swap twice (once in ioread32 and once again to - * get the value correct) */ -#define bS_to_io(x) ((hostdata->force_le_on_be) ? (x) : cpu_to_le32(x)) +#define bEBus (!hostdata->force_le_on_be) #elif defined(__BIG_ENDIAN) #define bE 3 #define bSWAP 0 -#define bS_to_io(x) (x) #elif defined(__LITTLE_ENDIAN) #define bE 0 #define bSWAP 0 -#define bS_to_io(x) (x) #else #error "__BIG_ENDIAN or __LITTLE_ENDIAN must be defined, did you include byteorder.h?" #endif +#ifndef bEBus +#ifdef CONFIG_53C700_BE_BUS +#define bEBus 1 +#else +#define bEBus 0 +#endif +#endif #define bS_to_cpu(x) (bSWAP ? le32_to_cpu(x) : (x)) #define bS_to_host(x) (bSWAP ? cpu_to_le32(x) : (x)) @@ -466,14 +468,15 @@ NCR_700_readl(struct Scsi_Host *host, __u32 reg) { const struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)host->hostdata[0]; - __u32 value = ioread32(hostdata->base + reg); + __u32 value = bEBus ? ioread32be(hostdata->base + reg) : + ioread32(hostdata->base + reg); #if 1 /* sanity check the register */ if((reg & 0x3) != 0) BUG(); #endif - return bS_to_io(value); + return value; } static inline void @@ -497,7 +500,8 @@ NCR_700_writel(__u32 value, struct Scsi_Host *host, __u32 reg) BUG(); #endif - iowrite32(bS_to_io(value), hostdata->base + reg); + bEBus ? iowrite32be(value, hostdata->base + reg): + iowrite32(value, hostdata->base + reg); } #endif |