diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2006-02-07 07:54:46 -0700 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-02-27 22:55:09 -0600 |
| commit | 6ea3c0b2dac0d6a857d6bc010e544f4c901fff78 (patch) | |
| tree | 0650d6e8b5be747eb192e558dd90e875ca7a13fb /drivers/scsi/scsi_transport_spi.c | |
| parent | b0dc1db15225d5801bf3105966c9ce12c5142013 (diff) | |
[SCSI] Add spi_populate_*_msg functions
Introduce new helpers:
- spi_populate_width_msg()
- spi_populate_sync_msg()
- spi_populate_ppr_msg()
and use them in drivers which already enable the SPI transport.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_spi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_spi.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 97f4be62f74..c0051a432a9 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -1051,6 +1051,39 @@ void spi_display_xfer_agreement(struct scsi_target *starget) } EXPORT_SYMBOL(spi_display_xfer_agreement); +int spi_populate_width_msg(unsigned char *msg, int width) +{ + msg[0] = EXTENDED_MESSAGE; + msg[1] = 2; + msg[2] = EXTENDED_WDTR; + msg[3] = width; + return 4; +} + +int spi_populate_sync_msg(unsigned char *msg, int period, int offset) +{ + msg[0] = EXTENDED_MESSAGE; + msg[1] = 3; + msg[2] = EXTENDED_SDTR; + msg[3] = period; + msg[4] = offset; + return 5; +} + +int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, + int width, int options) +{ + msg[0] = EXTENDED_MESSAGE; + msg[1] = 6; + msg[2] = EXTENDED_PPR; + msg[3] = period; + msg[4] = 0; + msg[5] = offset; + msg[6] = width; + msg[7] = options; + return 8; +} + #ifdef CONFIG_SCSI_CONSTANTS static const char * const one_byte_msgs[] = { /* 0x00 */ "Command Complete", NULL, "Save Pointers", |