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authorMatthew Wilcox <matthew@wil.cx>2006-02-07 07:54:46 -0700
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-02-27 22:55:09 -0600
commit6ea3c0b2dac0d6a857d6bc010e544f4c901fff78 (patch)
tree0650d6e8b5be747eb192e558dd90e875ca7a13fb /drivers/scsi/scsi_transport_spi.c
parentb0dc1db15225d5801bf3105966c9ce12c5142013 (diff)
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[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.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 97f4be62f748..c0051a432a97 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",