diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-09-19 15:25:30 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-09-03 12:06:41 +0300 |
| commit | 356b6c4ef5d62869f8e9ff9003ef6bd8db793539 (patch) | |
| tree | d7fd143147baa8433ba1e3043c799c49d2e2380c /drivers/thunderbolt/switch.c | |
| parent | 2ca3263a806d11d37387ae4cf79c2474b2a6f2dd (diff) | |
| download | lwn-356b6c4ef5d62869f8e9ff9003ef6bd8db793539.tar.gz lwn-356b6c4ef5d62869f8e9ff9003ef6bd8db793539.zip | |
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/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 21 |
1 files changed, 11 insertions, 10 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; |