diff options
author | Christoph Hellwig <hch@lst.de> | 2005-08-19 18:57:13 +0200 |
---|---|---|
committer | James Bottomley <jejb@mulgrave.(none)> | 2005-09-04 19:46:07 -0500 |
commit | 1ff927306e08b356d764e605eff7c50079550bd2 (patch) | |
tree | e96b628ce6673694c615f57013fcc14f72a6677f /drivers/scsi/aic7xxx/aic79xx_proc.c | |
parent | 77d71d222e871670300f3e3092e2a06f20c842f0 (diff) | |
download | linux-stable-1ff927306e08b356d764e605eff7c50079550bd2.tar.gz linux-stable-1ff927306e08b356d764e605eff7c50079550bd2.tar.bz2 linux-stable-1ff927306e08b356d764e605eff7c50079550bd2.zip |
[SCSI] aic7xxx: remove aiclib.c
#include of C files and macro tricks to rename symbols are evil and just
cause trouble. Let's doublicate the two functions as they're going to
go away soon enough anyway.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/aic7xxx/aic79xx_proc.c')
-rw-r--r-- | drivers/scsi/aic7xxx/aic79xx_proc.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx_proc.c b/drivers/scsi/aic7xxx/aic79xx_proc.c index 32be1f55998c..39a27840fce6 100644 --- a/drivers/scsi/aic7xxx/aic79xx_proc.c +++ b/drivers/scsi/aic7xxx/aic79xx_proc.c @@ -53,6 +53,49 @@ static void ahd_dump_device_state(struct info_str *info, static int ahd_proc_write_seeprom(struct ahd_softc *ahd, char *buffer, int length); +/* + * Table of syncrates that don't follow the "divisible by 4" + * rule. This table will be expanded in future SCSI specs. + */ +static struct { + u_int period_factor; + u_int period; /* in 100ths of ns */ +} scsi_syncrates[] = { + { 0x08, 625 }, /* FAST-160 */ + { 0x09, 1250 }, /* FAST-80 */ + { 0x0a, 2500 }, /* FAST-40 40MHz */ + { 0x0b, 3030 }, /* FAST-40 33MHz */ + { 0x0c, 5000 } /* FAST-20 */ +}; + +/* + * Return the frequency in kHz corresponding to the given + * sync period factor. + */ +static u_int +ahd_calc_syncsrate(u_int period_factor) +{ + int i; + int num_syncrates; + + num_syncrates = sizeof(scsi_syncrates) / sizeof(scsi_syncrates[0]); + /* See if the period is in the "exception" table */ + for (i = 0; i < num_syncrates; i++) { + + if (period_factor == scsi_syncrates[i].period_factor) { + /* Period in kHz */ + return (100000000 / scsi_syncrates[i].period); + } + } + + /* + * Wasn't in the table, so use the standard + * 4 times conversion. + */ + return (10000000 / (period_factor * 4 * 10)); +} + + static void copy_mem_info(struct info_str *info, char *data, int len) { @@ -109,7 +152,7 @@ ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo) speed = 3300; freq = 0; if (tinfo->offset != 0) { - freq = aic_calc_syncsrate(tinfo->period); + freq = ahd_calc_syncsrate(tinfo->period); speed = freq; } speed *= (0x01 << tinfo->width); |