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usb: typec: ucsi: Register SOP/SOP' Discover Identity Responses
Register SOP and SOP' Discover Identity responses with the USB Type-C Connector Class as partner and cable identities, respectively. Discover Identity responses are requested from the PPM using the GET_PD_MESSAGE UCSI command. Signed-off-by: Jameson Thies <jthies@google.com> Reviewed-by: Benson Leung <bleung@chromium.org> Link: https://lore.kernel.org/r/20240305025804.1290919-4-jthies@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jameson Thies
Greg Kroah-Hartman
parent
38ca416597
commit
f896d5e872
@ -646,6 +646,108 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
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return ret;
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}
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static int ucsi_read_identity(struct ucsi_connector *con, u8 recipient,
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u8 offset, u8 bytes, void *resp)
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{
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struct ucsi *ucsi = con->ucsi;
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u64 command;
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int ret;
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command = UCSI_COMMAND(UCSI_GET_PD_MESSAGE) |
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UCSI_CONNECTOR_NUMBER(con->num);
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command |= UCSI_GET_PD_MESSAGE_RECIPIENT(recipient);
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command |= UCSI_GET_PD_MESSAGE_OFFSET(offset);
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command |= UCSI_GET_PD_MESSAGE_BYTES(bytes);
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command |= UCSI_GET_PD_MESSAGE_TYPE(UCSI_GET_PD_MESSAGE_TYPE_IDENTITY);
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ret = ucsi_send_command(ucsi, command, resp, bytes);
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if (ret < 0)
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dev_err(ucsi->dev, "UCSI_GET_PD_MESSAGE failed (%d)\n", ret);
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return ret;
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}
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static int ucsi_get_identity(struct ucsi_connector *con, u8 recipient,
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struct usb_pd_identity *id)
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{
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struct ucsi *ucsi = con->ucsi;
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struct ucsi_pd_message_disc_id resp = {};
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int ret;
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if (ucsi->version < UCSI_VERSION_2_0) {
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/*
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* Before UCSI v2.0, MESSAGE_IN is 16 bytes which cannot fit
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* the 28 byte identity response including the VDM header.
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* First request the VDM header, ID Header VDO, Cert Stat VDO
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* and Product VDO.
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*/
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ret = ucsi_read_identity(con, recipient, 0, 0x10, &resp);
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if (ret < 0)
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return ret;
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/* Then request Product Type VDO1 through Product Type VDO3. */
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ret = ucsi_read_identity(con, recipient, 0x10, 0xc,
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&resp.vdo[0]);
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if (ret < 0)
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return ret;
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} else {
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/*
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* In UCSI v2.0 and after, MESSAGE_IN is large enough to request
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* the large enough to request the full Discover Identity
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* response at once.
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*/
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ret = ucsi_read_identity(con, recipient, 0x0, 0x1c, &resp);
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if (ret < 0)
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return ret;
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}
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id->id_header = resp.id_header;
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id->cert_stat = resp.cert_stat;
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id->product = resp.product;
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id->vdo[0] = resp.vdo[0];
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id->vdo[1] = resp.vdo[1];
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id->vdo[2] = resp.vdo[2];
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return 0;
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}
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static int ucsi_get_partner_identity(struct ucsi_connector *con)
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{
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int ret;
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ret = ucsi_get_identity(con, UCSI_RECIPIENT_SOP,
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&con->partner_identity);
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if (ret < 0)
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return ret;
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ret = typec_partner_set_identity(con->partner);
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if (ret < 0) {
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dev_err(con->ucsi->dev, "Failed to set partner identity (%d)\n",
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ret);
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}
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return ret;
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}
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static int ucsi_get_cable_identity(struct ucsi_connector *con)
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{
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int ret;
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ret = ucsi_get_identity(con, UCSI_RECIPIENT_SOP_P,
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&con->cable_identity);
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if (ret < 0)
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return ret;
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ret = typec_cable_set_identity(con->cable);
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if (ret < 0) {
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dev_err(con->ucsi->dev, "Failed to set cable identity (%d)\n",
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ret);
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}
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return ret;
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}
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static int ucsi_check_altmodes(struct ucsi_connector *con)
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{
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int ret, num_partner_am;
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@ -754,6 +856,7 @@ static int ucsi_register_cable(struct ucsi_connector *con)
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break;
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}
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desc.identity = &con->cable_identity;
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desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE &
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con->cable_prop.flags);
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desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(
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@ -777,6 +880,7 @@ static void ucsi_unregister_cable(struct ucsi_connector *con)
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return;
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typec_unregister_cable(con->cable);
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memset(&con->cable_identity, 0, sizeof(con->cable_identity));
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con->cable = NULL;
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}
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@ -827,6 +931,7 @@ static int ucsi_register_partner(struct ucsi_connector *con)
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break;
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}
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desc.identity = &con->partner_identity;
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desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
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desc.pd_revision = UCSI_CONCAP_FLAG_PARTNER_PD_MAJOR_REV_AS_BCD(con->cap.flags);
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@ -855,6 +960,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
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ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
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ucsi_unregister_cable(con);
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typec_unregister_partner(con->partner);
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memset(&con->partner_identity, 0, sizeof(con->partner_identity));
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con->partner = NULL;
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}
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@ -975,6 +1081,10 @@ static int ucsi_check_cable(struct ucsi_connector *con)
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if (ret < 0)
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return ret;
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ret = ucsi_get_cable_identity(con);
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if (ret < 0)
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return ret;
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return 0;
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}
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@ -1019,6 +1129,7 @@ static void ucsi_handle_connector_change(struct work_struct *work)
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ucsi_register_partner(con);
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ucsi_partner_task(con, ucsi_check_connection, 1, HZ);
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ucsi_partner_task(con, ucsi_check_connector_capability, 1, HZ);
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ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ);
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ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
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if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
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@ -1418,6 +1529,7 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
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ucsi_register_partner(con);
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ucsi_pwr_opmode_change(con);
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ucsi_port_psy_changed(con);
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ucsi_get_partner_identity(con);
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ucsi_check_cable(con);
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}
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@ -106,6 +106,7 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
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#define UCSI_GET_CABLE_PROPERTY 0x11
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#define UCSI_GET_CONNECTOR_STATUS 0x12
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#define UCSI_GET_ERROR_STATUS 0x13
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#define UCSI_GET_PD_MESSAGE 0x15
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#define UCSI_CONNECTOR_NUMBER(_num_) ((u64)(_num_) << 16)
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#define UCSI_COMMAND(_cmd_) ((_cmd_) & 0xff)
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@ -159,6 +160,18 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num);
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#define UCSI_MAX_PDOS (4)
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#define UCSI_GET_PDOS_SRC_PDOS ((u64)1 << 34)
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/* GET_PD_MESSAGE command bits */
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#define UCSI_GET_PD_MESSAGE_RECIPIENT(_r_) ((u64)(_r_) << 23)
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#define UCSI_GET_PD_MESSAGE_OFFSET(_r_) ((u64)(_r_) << 26)
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#define UCSI_GET_PD_MESSAGE_BYTES(_r_) ((u64)(_r_) << 34)
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#define UCSI_GET_PD_MESSAGE_TYPE(_r_) ((u64)(_r_) << 42)
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#define UCSI_GET_PD_MESSAGE_TYPE_SNK_CAP_EXT 0
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#define UCSI_GET_PD_MESSAGE_TYPE_SRC_CAP_EXT 1
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#define UCSI_GET_PD_MESSAGE_TYPE_BAT_CAP 2
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#define UCSI_GET_PD_MESSAGE_TYPE_BAT_STAT 3
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#define UCSI_GET_PD_MESSAGE_TYPE_IDENTITY 4
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#define UCSI_GET_PD_MESSAGE_TYPE_REVISION 5
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/* -------------------------------------------------------------------------- */
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/* Error information returned by PPM in response to GET_ERROR_STATUS command. */
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@ -338,6 +351,18 @@ struct ucsi_connector_status {
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((get_unaligned_le32(&(_p_)[5]) & GENMASK(16, 1)) >> 1)
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} __packed;
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/*
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* Data structure filled by PPM in response to GET_PD_MESSAGE command with the
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* Response Message Type set to Discover Identity Response.
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*/
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struct ucsi_pd_message_disc_id {
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u32 vdm_header;
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u32 id_header;
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u32 cert_stat;
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u32 product;
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u32 vdo[3];
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} __packed;
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/* -------------------------------------------------------------------------- */
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struct ucsi_debugfs_entry {
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@ -428,6 +453,10 @@ struct ucsi_connector {
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struct usb_power_delivery_capabilities *partner_sink_caps;
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struct usb_role_switch *usb_role_sw;
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/* USB PD identity */
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struct usb_pd_identity partner_identity;
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struct usb_pd_identity cable_identity;
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};
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int ucsi_send_command(struct ucsi *ucsi, u64 command,
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