[SCSI] Move scsi_print_msg to SPI class

scsi_print_msg() is an SPI-specific concept.  This patch moves it from
constants.c to scsi_transport_spi.c and updates the Kconfig to link in
the SPI class for the drivers which use scsi_print_msg().

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 4002a98ab16f..00a73fc23fcc 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -18,6 +18,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#include <linux/config.h>
 #include <linux/ctype.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -1047,6 +1048,114 @@ void spi_display_xfer_agreement(struct scsi_target *starget)
 }
 EXPORT_SYMBOL(spi_display_xfer_agreement);
 
+#ifdef CONFIG_SCSI_CONSTANTS
+static const char * const one_byte_msgs[] = {
+/* 0x00 */ "Command Complete", NULL, "Save Pointers",
+/* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", 
+/* 0x06 */ "Abort", "Message Reject", "Nop", "Message Parity Error",
+/* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag",
+/* 0x0c */ "Bus device reset", "Abort Tag", "Clear Queue", 
+/* 0x0f */ "Initiate Recovery", "Release Recovery"
+};
+#define NO_ONE_BYTE_MSGS (sizeof(one_byte_msgs)  / sizeof (const char *))
+
+static const char * const two_byte_msgs[] = {
+/* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag"
+/* 0x23 */ "Ignore Wide Residue"
+};
+#define NO_TWO_BYTE_MSGS (sizeof(two_byte_msgs)  / sizeof (const char *))
+
+static const char * const extended_msgs[] = {
+/* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request",
+/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request"
+};
+#define NO_EXTENDED_MSGS (sizeof(two_byte_msgs)  / sizeof (const char *))
+
+
+int scsi_print_msg (const unsigned char *msg)
+{
+        int len = 0, i;
+        if (msg[0] == EXTENDED_MESSAGE) {
+                len = 3 + msg[1];
+                if (msg[2] < NO_EXTENDED_MSGS)
+                        printk ("%s ", extended_msgs[msg[2]]); 
+                else 
+                        printk ("Extended Message, reserved code (0x%02x) ",
+                                (int) msg[2]);
+                switch (msg[2]) {
+                case EXTENDED_MODIFY_DATA_POINTER:
+                        printk("pointer = %d", (int) (msg[3] << 24) |
+                                (msg[4] << 16) | (msg[5] << 8) | msg[6]);
+                        break;
+                case EXTENDED_SDTR:
+                        printk("period = %d ns, offset = %d",
+                                (int) msg[3] * 4, (int) msg[4]);
+                        break;
+                case EXTENDED_WDTR:
+                        printk("width = 2^%d bytes", msg[3]);
+                        break;
+                default:
+                for (i = 2; i < len; ++i) 
+                        printk("%02x ", msg[i]);
+                }
+        /* Identify */
+        } else if (msg[0] & 0x80) {
+                printk("Identify disconnect %sallowed %s %d ",
+                        (msg[0] & 0x40) ? "" : "not ",
+                        (msg[0] & 0x20) ? "target routine" : "lun",
+                        msg[0] & 0x7);
+                len = 1;
+        /* Normal One byte */
+        } else if (msg[0] < 0x1f) {
+                if (msg[0] < NO_ONE_BYTE_MSGS)
+                        printk(one_byte_msgs[msg[0]]);
+                else
+                        printk("reserved (%02x) ", msg[0]);
+                len = 1;
+        /* Two byte */
+        } else if (msg[0] <= 0x2f) {
+                if ((msg[0] - 0x20) < NO_TWO_BYTE_MSGS)
+                        printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], 
+                                msg[1]);
+                else 
+                        printk("reserved two byte (%02x %02x) ", 
+                                msg[0], msg[1]);
+                len = 2;
+        } else 
+                printk("reserved");
+        return len;
+}
+EXPORT_SYMBOL(scsi_print_msg);
+
+#else  /* ifndef CONFIG_SCSI_CONSTANTS */
+
+int scsi_print_msg (const unsigned char *msg)
+{
+        int len = 0, i;
+
+        if (msg[0] == EXTENDED_MESSAGE) {
+                len = 3 + msg[1];
+                for (i = 0; i < len; ++i)
+                        printk("%02x ", msg[i]);
+        /* Identify */
+        } else if (msg[0] & 0x80) {
+                printk("%02x ", msg[0]);
+                len = 1;
+        /* Normal One byte */
+        } else if (msg[0] < 0x1f) {
+                printk("%02x ", msg[0]);
+                len = 1;
+        /* Two byte */
+        } else if (msg[0] <= 0x2f) {
+                printk("%02x %02x", msg[0], msg[1]);
+                len = 2;
+        } else 
+                printk("%02x ", msg[0]);
+        return len;
+}
+EXPORT_SYMBOL(scsi_print_msg);
+#endif /* ! CONFIG_SCSI_CONSTANTS */
+
 #define SETUP_ATTRIBUTE(field)                                          \
         i->private_attrs[count] = class_device_attr_##field;            \
         if (!i->f->set_##field) {                                       \