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usb: pd: Add support to notify plug orientation via extcon

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Policy engine needs to provide the plug orientation upon
type-c cable plug in. qmp phy driver needs to program phy
lane based upon this information.

Change-Id: Idd236136c9f0a9163b4ae7a8405c412f1d69ca9e
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2016-05-12 16:07:40 -07:00 • committed by Kyle Yan
parent 20b1701b73
commit 77f6fd8044
1 changed files with 49 additions and 1 deletions
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50
drivers/usb/pd/policy_engine.c
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@ -118,6 +118,12 @@ enum usbpd_data_msg_type {
MSG_VDM = 0xF,
};
enum plug_orientation {
ORIENTATION_NONE,
ORIENTATION_CC1,
ORIENTATION_CC2,
};
/* Timeouts (in ms) */
#define ERROR_RECOVERY_TIME 25
#define SENDER_RESPONSE_TIME 30
@ -239,10 +245,41 @@ static LIST_HEAD(_usbpd); /* useful for debugging */
static const unsigned int usbpd_extcon_cable[] = {
EXTCON_USB,
EXTCON_USB_HOST,
EXTCON_USB_CC,
EXTCON_NONE,
};
static const u32 usbpd_extcon_exclusive[] = {0xffffffff, 0};
/* EXTCON_USB and EXTCON_USB_HOST are mutually exclusive */
static const u32 usbpd_extcon_exclusive[] = {0x3, 0};
static enum plug_orientation usbpd_get_plug_orientation(struct usbpd *pd)
{
int ret;
union power_supply_propval val;
ret = power_supply_get_property(pd->usb_psy,
POWER_SUPPLY_PROP_TYPEC_CC_ORIENTATION, &val);
if (ret)
return ORIENTATION_NONE;
return val.intval;
}
static bool is_cable_flipped(struct usbpd *pd)
{
enum plug_orientation cc;
cc = usbpd_get_plug_orientation(pd);
if (cc == ORIENTATION_CC2)
return true;
/*
* ORIENTATION_CC1 or ORIENTATION_NONE.
* Return value for ORIENTATION_NONE is
* "dont care" as disconnect handles it.
*/
return false;
}
static int set_power_role(struct usbpd *pd, enum power_role pr)
{
@ -611,6 +648,9 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state)
if (pd->psy_type == POWER_SUPPLY_TYPE_USB ||
pd->psy_type == POWER_SUPPLY_TYPE_USB_CDP)
extcon_set_cable_state_(pd->extcon,
EXTCON_USB_CC,
is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon,
EXTCON_USB, 1);
}
@ -705,6 +745,8 @@ static void usbpd_set_state(struct usbpd *pd, enum usbpd_state next_state)
extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 0);
pd->current_dr = DR_UFP;
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1);
pd_phy_update_roles(pd->current_dr, pd->current_pr);
}
@ -739,10 +781,14 @@ static void dr_swap(struct usbpd *pd)
{
if (pd->current_dr == DR_DFP) {
extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 0);
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon, EXTCON_USB, 1);
pd->current_dr = DR_UFP;
} else if (pd->current_dr == DR_UFP) {
extcon_set_cable_state_(pd->extcon, EXTCON_USB, 0);
extcon_set_cable_state_(pd->extcon, EXTCON_USB_CC,
is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon, EXTCON_USB_HOST, 1);
pd->current_dr = DR_DFP;
}
@ -864,6 +910,8 @@ static void usbpd_sm(struct work_struct *w)
if (pd->caps_count == 5 && pd->current_dr == DR_DFP) {
/* Likely not PD-capable, start host now */
extcon_set_cable_state_(pd->extcon,
EXTCON_USB_CC, is_cable_flipped(pd));
extcon_set_cable_state_(pd->extcon,
EXTCON_USB_HOST, 1);
} else if (pd->caps_count >= PD_CAPS_COUNT) {