From 4dbc6a4ef06d6a79ff91be6fc2e90f8660031ce0 Mon Sep 17 00:00:00 2001 From: "K V, Abhilash" Date: Thu, 23 Apr 2020 16:20:57 +0300 Subject: [PATCH] usb: typec: ucsi: save power data objects in PD mode When connected to a PD-capable power-source, read & save all partner power data objects (PDOs) by using GET_PDOS UCSI command. Also, save the current power contract in request data object (RDO) for that connector. Signed-off-by: K V, Abhilash Signed-off-by: Heikki Krogerus Link: https://lore.kernel.org/r/20200423132058.6972-6-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/ucsi/ucsi.c | 26 ++++++++++++++++++++++++++ drivers/usb/typec/ucsi/ucsi.h | 9 +++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 0c7c3f9b1b50..ffea795da815 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -492,19 +492,45 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient) } } +static void ucsi_get_pdos(struct ucsi_connector *con, int is_partner) +{ + struct ucsi *ucsi = con->ucsi; + u64 command; + int ret; + + command = UCSI_COMMAND(UCSI_GET_PDOS) | UCSI_CONNECTOR_NUMBER(con->num); + command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner); + command |= UCSI_GET_PDOS_NUM_PDOS(UCSI_MAX_PDOS - 1); + command |= UCSI_GET_PDOS_SRC_PDOS; + ret = ucsi_run_command(ucsi, command, con->src_pdos, + sizeof(con->src_pdos)); + if (ret < 0) { + dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret); + return; + } + con->num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */ + if (ret == 0) + dev_warn(ucsi->dev, "UCSI_GET_PDOS returned 0 bytes\n"); +} + static void ucsi_pwr_opmode_change(struct ucsi_connector *con) { switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { case UCSI_CONSTAT_PWR_OPMODE_PD: + con->rdo = con->status.request_data_obj; typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD); + ucsi_get_pdos(con, 1); break; case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5: + con->rdo = 0; typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_1_5A); break; case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0: + con->rdo = 0; typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_3_0A); break; default: + con->rdo = 0; typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_USB); break; } diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h index f068356cc325..28e21a1e6b61 100644 --- a/drivers/usb/typec/ucsi/ucsi.h +++ b/drivers/usb/typec/ucsi/ucsi.h @@ -130,6 +130,11 @@ void ucsi_connector_change(struct ucsi *ucsi, u8 num); #define UCSI_GET_ALTMODE_OFFSET(_r_) ((u64)(_r_) << 32) #define UCSI_GET_ALTMODE_NUM_ALTMODES(_r_) ((u64)(_r_) << 40) +/* GET_PDOS command bits */ +#define UCSI_GET_PDOS_PARTNER_PDO(_r_) ((u64)(_r_) << 23) +#define UCSI_GET_PDOS_NUM_PDOS(_r_) ((u64)(_r_) << 32) +#define UCSI_GET_PDOS_SRC_PDOS ((u64)1 << 34) + /* -------------------------------------------------------------------------- */ /* Error information returned by PPM in response to GET_ERROR_STATUS command. */ @@ -294,6 +299,7 @@ struct ucsi { #define UCSI_MAX_SVID 5 #define UCSI_MAX_ALTMODES (UCSI_MAX_SVID * 6) +#define UCSI_MAX_PDOS (4) struct ucsi_connector { int num; @@ -313,6 +319,9 @@ struct ucsi_connector { struct ucsi_connector_status status; struct ucsi_connector_capability cap; + u32 rdo; + u32 src_pdos[UCSI_MAX_PDOS]; + int num_pdos; }; int ucsi_send_command(struct ucsi *ucsi, u64 command, -- 2.11.0