This adds more complete handling of VDMs and registration of
partner alternate modes, and introduces callbacks for
alternate mode operations.
Only DFP role is supported for now.
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
---
drivers/usb/typec/tcpm.c | 133 +++++++++++++++++++++++++++++++++++++++--------
1 file changed, 111 insertions(+), 22 deletions(-)
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index bfb843ebffa6..34bf5c1f4d81 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -158,13 +158,14 @@ enum pd_msg_request {
/* Alternate mode support */
#define SVID_DISCOVERY_MAX 16
+#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
struct pd_mode_data {
int svid_index; /* current SVID index */
int nsvids;
u16 svids[SVID_DISCOVERY_MAX];
int altmodes; /* number of alternate modes */
- struct typec_altmode_desc altmode_desc[SVID_DISCOVERY_MAX];
+ struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
};
struct tcpm_port {
@@ -280,8 +281,8 @@ struct tcpm_port {
/* Alternate mode data */
struct pd_mode_data mode_data;
- struct typec_altmode *partner_altmode[SVID_DISCOVERY_MAX * 6];
- struct typec_altmode *port_altmode[SVID_DISCOVERY_MAX * 6];
+ struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
+ struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
/* Deadline in jiffies to exit src_try_wait state */
unsigned long max_wait;
@@ -985,36 +986,53 @@ static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
pmdata->altmodes, paltmode->svid,
paltmode->mode, paltmode->vdo);
- port->partner_altmode[pmdata->altmodes] =
- typec_partner_register_altmode(port->partner, paltmode);
- if (!port->partner_altmode[pmdata->altmodes]) {
- tcpm_log(port,
- "Failed to register modes for SVID 0x%04x",
- paltmode->svid);
- return;
- }
pmdata->altmodes++;
}
}
+static void tcpm_register_partner_altmodes(struct tcpm_port *port)
+{
+ struct pd_mode_data *modep = &port->mode_data;
+ struct typec_altmode *altmode;
+ int i;
+
+ for (i = 0; i < modep->altmodes; i++) {
+ altmode = typec_partner_register_altmode(port->partner,
+ &modep->altmode_desc[i]);
+ if (!altmode)
+ tcpm_log(port, "Failed to register partner SVID 0x%04x",
+ modep->altmode_desc[i].svid);
+ port->partner_altmode[i] = altmode;
+ }
+}
+
#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
u32 *response)
{
- u32 p0 = le32_to_cpu(payload[0]);
- int cmd_type = PD_VDO_CMDT(p0);
- int cmd = PD_VDO_CMD(p0);
+ struct typec_altmode *altmode;
struct pd_mode_data *modep;
+ u32 p[PD_MAX_PAYLOAD];
int rlen = 0;
- u16 svid;
+ int cmd_type;
+ int cmd;
int i;
+ for (i = 0; i < cnt; i++)
+ p[i] = le32_to_cpu(payload[i]);
+
+ cmd_type = PD_VDO_CMDT(p[0]);
+ cmd = PD_VDO_CMD(p[0]);
+
tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
- p0, cmd_type, cmd, cnt);
+ p[0], cmd_type, cmd, cnt);
modep = &port->mode_data;
+ altmode = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
+ PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
+
switch (cmd_type) {
case CMDT_INIT:
switch (cmd) {
@@ -1036,17 +1054,21 @@ static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
case CMD_EXIT_MODE:
break;
case CMD_ATTENTION:
- break;
+ typec_altmode_attention(altmode, p[1]);
+ return 0;
default:
+ if (typec_altmode_vdm(altmode, p[0], &p[1], cnt) ==
+ VDM_OK)
+ return 0;
break;
}
if (rlen >= 1) {
- response[0] = p0 | VDO_CMDT(CMDT_RSP_ACK);
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
} else if (rlen == 0) {
- response[0] = p0 | VDO_CMDT(CMDT_RSP_NAK);
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
rlen = 1;
} else {
- response[0] = p0 | VDO_CMDT(CMDT_RSP_BUSY);
+ response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
rlen = 1;
}
break;
@@ -1079,20 +1101,26 @@ static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
svdm_consume_modes(port, payload, cnt);
modep->svid_index++;
if (modep->svid_index < modep->nsvids) {
- svid = modep->svids[modep->svid_index];
+ u16 svid = modep->svids[modep->svid_index];
response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
rlen = 1;
} else {
- /* enter alternate mode if/when implemented */
+ tcpm_register_partner_altmodes(port);
}
break;
case CMD_ENTER_MODE:
+ typec_altmode_enter(altmode);
+ break;
+ case CMD_EXIT_MODE:
+ typec_altmode_exit(altmode);
break;
default:
+ typec_altmode_vdm(altmode, p[0], &p[1], cnt);
break;
}
break;
default:
+ typec_altmode_vdm(altmode, p[0], &p[1], cnt);
break;
}
@@ -1352,6 +1380,47 @@ static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
return 0;
}
+static void tcpm_altmode_enter(struct typec_altmode *altmode)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ u32 header;
+
+ header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm(port, header, NULL, 0);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+}
+
+static void tcpm_altmode_exit(struct typec_altmode *altmode)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ u32 header;
+
+ header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm(port, header, NULL, 0);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+}
+
+static int tcpm_altmode_vdm(struct typec_altmode *altmode,
+ u32 header, const u32 *data, int count)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+
+ tcpm_queue_vdm(port, header, data, count - 1);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+
+ return 0;
+}
+
+static const struct typec_altmode_ops tcpm_altmode_ops = {
+ .enter = tcpm_altmode_enter,
+ .exit = tcpm_altmode_exit,
+ .vdm = tcpm_altmode_vdm,
+};
+
/*
* PD (data, control) command handling functions
*/
@@ -3479,6 +3548,23 @@ static void tcpm_init(struct tcpm_port *port)
tcpm_set_state(port, PORT_RESET, 0);
}
+static int tcpm_activate_mode(struct typec_altmode *alt, int activate)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(alt);
+ u32 header;
+
+ header = VDO(cpu_to_le16(alt->svid), 1,
+ activate ? CMD_ENTER_MODE : CMD_EXIT_MODE);
+ header |= VDO_OPOS(alt->mode);
+
+ mutex_lock(&port->lock);
+ tcpm_queue_vdm(port, header, NULL, 0);
+ mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
+ mutex_unlock(&port->lock);
+
+ return 0;
+}
+
static int tcpm_port_type_set(const struct typec_capability *cap,
enum typec_port_type type)
{
@@ -3671,6 +3757,7 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
port->typec_caps.pr_set = tcpm_pr_set;
port->typec_caps.vconn_set = tcpm_vconn_set;
port->typec_caps.try_role = tcpm_try_role;
+ port->typec_caps.activate_mode = tcpm_activate_mode;
port->typec_caps.port_type_set = tcpm_port_type_set;
port->partner_desc.identity = &port->partner_ident;
@@ -3703,6 +3790,8 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
dev_name(dev), paltmode->svid);
break;
}
+ typec_altmode_set_drvdata(alt, port);
+ typec_altmode_register_ops(alt, &tcpm_altmode_ops);
port->port_altmode[i] = alt;
i++;
paltmode++;
--
2.16.1
--
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