[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>
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 97f4be62..c0051a4 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -1051,6 +1051,39 @@
}
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",
