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authorMika Westerberg <mika.westerberg@linux.intel.com>2019-09-19 15:25:30 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2020-09-03 12:06:41 +0300
commit356b6c4ef5d62869f8e9ff9003ef6bd8db793539 (patch)
treed7fd143147baa8433ba1e3043c799c49d2e2380c /drivers/thunderbolt
parent2ca3263a806d11d37387ae4cf79c2474b2a6f2dd (diff)
downloadlinux-356b6c4ef5d62869f8e9ff9003ef6bd8db793539.tar.bz2
thunderbolt: Send reset only to first generation routers
First generation routers may need the reset command upon resume but it is not supported by newer generations. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt')
-rw-r--r--drivers/thunderbolt/switch.c21
-rw-r--r--drivers/thunderbolt/tb.c2
-rw-r--r--drivers/thunderbolt/tb.h2
3 files changed, 13 insertions, 12 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 7ffb3b00b54f..55ed8bcc60c3 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1233,23 +1233,24 @@ static void tb_dump_switch(const struct tb *tb, const struct tb_switch *sw)
/**
* reset_switch() - reconfigure route, enable and send TB_CFG_PKG_RESET
+ * @sw: Switch to reset
*
* Return: Returns 0 on success or an error code on failure.
*/
-int tb_switch_reset(struct tb *tb, u64 route)
+int tb_switch_reset(struct tb_switch *sw)
{
struct tb_cfg_result res;
- struct tb_regs_switch_header header = {
- header.route_hi = route >> 32,
- header.route_lo = route,
- header.enabled = true,
- };
- tb_dbg(tb, "resetting switch at %llx\n", route);
- res.err = tb_cfg_write(tb->ctl, ((u32 *) &header) + 2, route,
- 0, 2, 2, 2);
+
+ if (sw->generation > 1)
+ return 0;
+
+ tb_sw_dbg(sw, "resetting switch\n");
+
+ res.err = tb_sw_write(sw, ((u32 *) &sw->config) + 2,
+ TB_CFG_SWITCH, 2, 2);
if (res.err)
return res.err;
- res = tb_cfg_reset(tb->ctl, route, TB_CFG_DEFAULT_TIMEOUT);
+ res = tb_cfg_reset(sw->tb->ctl, tb_route(sw), TB_CFG_DEFAULT_TIMEOUT);
if (res.err > 0)
return -EIO;
return res.err;
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 98f268a818a0..a6da2d0567ae 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -1258,7 +1258,7 @@ static int tb_resume_noirq(struct tb *tb)
tb_dbg(tb, "resuming...\n");
/* remove any pci devices the firmware might have setup */
- tb_switch_reset(tb, 0);
+ tb_switch_reset(tb->root_switch);
tb_switch_resume(tb->root_switch);
tb_free_invalid_tunnels(tb);
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index a413d55b5f8b..b16d290690f3 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -634,7 +634,7 @@ int tb_switch_add(struct tb_switch *sw);
void tb_switch_remove(struct tb_switch *sw);
void tb_switch_suspend(struct tb_switch *sw);
int tb_switch_resume(struct tb_switch *sw);
-int tb_switch_reset(struct tb *tb, u64 route);
+int tb_switch_reset(struct tb_switch *sw);
void tb_sw_set_unplugged(struct tb_switch *sw);
struct tb_port *tb_switch_find_port(struct tb_switch *sw,
enum tb_port_type type);