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| author | Li Jun <B47624@freescale.com> | 2014-02-27 07:38:19 +0800 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-03-07 10:03:25 -0600 |
| commit | 8bebbe8dc6145303db05964fb09657aac2a7e909 (patch) | |
| tree | 9c47b026a82c8a2a01900ef38c81009f9f77d7de /drivers/usb | |
| parent | 716fb91dfe1777bd6d5e598f3d3572214b3ed296 (diff) | |
| download | linux-8bebbe8dc6145303db05964fb09657aac2a7e909.tar.gz linux-8bebbe8dc6145303db05964fb09657aac2a7e909.tar.bz2 linux-8bebbe8dc6145303db05964fb09657aac2a7e909.zip | |
usb: phy: fsm: update OTG HNP state transition conditions according to OTG and EH 2.0 spec.
According to:"On-The-Go and Embedded Host Supplement to the USB Revision 2.0
Specification July 27, 2012 Revision 2.0 version 1.1a"
- From a_host to a_wait_bcon if !b_conn
- Add transition from a_host to a_wait_vfall if id state is high or a_bus_drop
- From a_wait_vfall to a_idle if a_wait_vfall_tmout
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/phy/phy-fsm-usb.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c index 7aa314ef4a8a..c47e5a6edde2 100644 --- a/drivers/usb/phy/phy-fsm-usb.c +++ b/drivers/usb/phy/phy-fsm-usb.c @@ -317,10 +317,12 @@ int otg_statemachine(struct otg_fsm *fsm) otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); break; case OTG_STATE_A_HOST: - if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && + if (fsm->id || fsm->a_bus_drop) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && fsm->otg->host->b_hnp_enable) otg_set_state(fsm, OTG_STATE_A_SUSPEND); - else if (fsm->id || !fsm->b_conn || fsm->a_bus_drop) + else if (!fsm->b_conn) otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); else if (!fsm->a_vbus_vld) otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); @@ -346,8 +348,7 @@ int otg_statemachine(struct otg_fsm *fsm) otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); break; case OTG_STATE_A_WAIT_VFALL: - if (fsm->a_wait_vfall_tmout || fsm->id || fsm->a_bus_req || - (!fsm->a_sess_vld && !fsm->b_conn)) + if (fsm->a_wait_vfall_tmout) otg_set_state(fsm, OTG_STATE_A_IDLE); break; case OTG_STATE_A_VBUS_ERR: |