thunderbolt: Move LC specific functionality into a separate file

We will be adding more link controller functionality in subsequent
patches and it does not make sense to keep all that in switch.c, so
separate LC functionality into its own file.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

1 files changed, 10 insertions, 11 deletions

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 1e29c06947af..63ff4c753d89 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1182,6 +1182,10 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
         }
         sw->cap_plug_events = cap;
 
+        cap = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
+        if (cap > 0)
+                sw->cap_lc = cap;
+
         /* Root switch is always authorized */
         if (!route)
                 sw->authorized = true;
@@ -1278,22 +1282,17 @@ int tb_switch_configure(struct tb_switch *sw)
 static int tb_switch_set_uuid(struct tb_switch *sw)
 {
         u32 uuid[4];
-        int cap, ret;
+        int ret;
 
-        ret = 0;
         if (sw->uuid)
-                return ret;
+                return 0;
 
         /*
          * The newer controllers include fused UUID as part of link
          * controller specific registers
          */
-        cap = tb_switch_find_vse_cap(sw, TB_VSE_CAP_LINK_CONTROLLER);
-        if (cap > 0) {
-                ret = tb_sw_read(sw, uuid, TB_CFG_SWITCH, cap + 3, 4);
-                if (ret)
-                        return ret;
-        } else {
+        ret = tb_lc_read_uuid(sw, uuid);
+        if (ret) {
                 /*
                  * ICM generates UUID based on UID and fills the upper
                  * two words with ones. This is not strictly following
@@ -1308,8 +1307,8 @@ static int tb_switch_set_uuid(struct tb_switch *sw)
 
         sw->uuid = kmemdup(uuid, sizeof(uuid), GFP_KERNEL);
         if (!sw->uuid)
-                ret = -ENOMEM;
-        return ret;
+                return -ENOMEM;
+        return 0;
 }
 
 static int tb_switch_add_dma_port(struct tb_switch *sw)