ssb: Look for SPROM at different offset on higher rev CC

Our offset handling becomes even a little more hackish now. For some reason I
do not understand all offsets as inrelative. It assumes base offset is 0x1000
but it will work for now as we make offsets relative anyway by removing base
0x1000. Should be cleaner however.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 9 insertions, 4 deletions

diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c
index a4b2b99f2c8..5bb1278759c 100644
--- a/drivers/ssb/pci.c
+++ b/drivers/ssb/pci.c
@@ -167,7 +167,7 @@ err_pci:
 }
 
 /* Get the word-offset for a SSB_SPROM_XXX define. */
-#define SPOFF(offset)   (((offset) - SSB_SPROM_BASE) / sizeof(u16))
+#define SPOFF(offset)   (((offset) - SSB_SPROM_BASE1) / sizeof(u16))
 /* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
 #define SPEX16(_outvar, _offset, _mask, _shift) \
         out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
@@ -253,7 +253,7 @@ static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
         int i;
 
         for (i = 0; i < bus->sprom_size; i++)
-                sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
+                sprom[i] = ioread16(bus->mmio + bus->sprom_offset + (i * 2));
 
         return 0;
 }
@@ -284,7 +284,7 @@ static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
                         ssb_printk("75%%");
                 else if (i % 2)
                         ssb_printk(".");
-                writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
+                writew(sprom[i], bus->mmio + bus->sprom_offset + (i * 2));
                 mmiowb();
                 msleep(20);
         }
@@ -625,6 +625,9 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus,
                 return -ENODEV;
         }
 
+        bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ?
+                SSB_SPROM_BASE1 : SSB_SPROM_BASE31;
+
         buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
         if (!buf)
                 goto out;
diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index 3b4da233e31..a2608bff9c7 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -305,6 +305,7 @@ struct ssb_bus {
         /* ID information about the Chip. */
         u16 chip_id;
         u16 chip_rev;
+        u16 sprom_offset;
         u16 sprom_size;         /* number of words in sprom */
         u8 chip_package;
 
diff --git a/include/linux/ssb/ssb_regs.h b/include/linux/ssb/ssb_regs.h
index 9ae9082eaeb..b8be23ce191 100644
--- a/include/linux/ssb/ssb_regs.h
+++ b/include/linux/ssb/ssb_regs.h
@@ -170,7 +170,8 @@
 #define SSB_SPROMSIZE_WORDS_R4          220
 #define SSB_SPROMSIZE_BYTES_R123        (SSB_SPROMSIZE_WORDS_R123 * sizeof(u16))
 #define SSB_SPROMSIZE_BYTES_R4          (SSB_SPROMSIZE_WORDS_R4 * sizeof(u16))
-#define SSB_SPROM_BASE                  0x1000
+#define SSB_SPROM_BASE1                 0x1000
+#define SSB_SPROM_BASE31                0x0800
 #define SSB_SPROM_REVISION              0x107E
 #define  SSB_SPROM_REVISION_REV         0x00FF  /* SPROM Revision number */
 #define  SSB_SPROM_REVISION_CRC         0xFF00  /* SPROM CRC8 value */