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| author | Aseda Aboagye <aaboagye@google.com> | 2020-01-16 21:29:32 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-22 12:01:35 +0000 |
| commit | 5c95136c7fb3acdeaf182727d7417b2a02cdbdfb (patch) | |
| tree | 601f860f7f8284d0b804f436061a8a2a477c5e4a /include | |
| parent | be95f2907da12b1d7c94d4e194ac7e5bee185c40 (diff) | |
| download | chrome-ec-5c95136c7fb3acdeaf182727d7417b2a02cdbdfb.tar.gz | |
driver/tcpci: Add support for TCPCI Rev2 v1.0
The TCPCI Revision 2.0 made a couple major changes compared to the 1.0
revision. One of these changes was that the method in transmitting and
receiving messages from the TCPC had changed. The receive buffer
register is now comprised of three sets of registers:
READABLE_BYTE_COUNT, RX_BUF_FRAME_TYPE, and RX_BUF_BYTE_x. These
registers can only be accessed by reading at a common register address
30h.
Similarly, the transmit buffer register holds the I2C_WRITE_BYTE_COUNT
and the portion of the SOP* USB PD message payload (including the
header) in TX_BUF_BYTE_x. TX_BUF_BYTE_x is "hidden" and can only be
accessed by writing to register address 51h.
This commit adds support for TCPCI Rev2 v1.0 by adding the new
mechanisms for transmitting and receiving messages. A flag was
introduced to enable the TCPCI Rev2 handling, TCPC_FLAGS_TCPCI_V2_0. A
board should set this flag in their tcpc_config structs for those
TCPCI-compliant TCPCs which use TCPCI Rev2.
BUG=b:147716486
BRANCH=None
TEST=Enable TCPCI Rev2.0 on waddledoo, verify that PD messages are able
to be received and transmitted.
Change-Id: Ie0117adf56c95f85f9c67ed678cf1e367f83eb7e
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2006710
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/usb_pd_tcpm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/usb_pd_tcpm.h b/include/usb_pd_tcpm.h index 9d6cbec160..9a4140afb4 100644 --- a/include/usb_pd_tcpm.h +++ b/include/usb_pd_tcpm.h @@ -355,10 +355,12 @@ struct tcpm_drv { * Bit 0 --> Polarity for TCPC alert. Set to 1 if alert is active high. * Bit 1 --> Set to 1 if TCPC alert line is open-drain instead of push-pull. * Bit 2 --> Polarity for TCPC reset. Set to 1 if reset line is active high. + * Bit 3 --> Set to 1 if TCPC is using TCPCI Version 2.0 */ #define TCPC_FLAGS_ALERT_ACTIVE_HIGH BIT(0) #define TCPC_FLAGS_ALERT_OD BIT(1) #define TCPC_FLAGS_RESET_ACTIVE_HIGH BIT(2) +#define TCPC_FLAGS_TCPCI_V2_0 BIT(3) struct tcpc_config_t { enum ec_bus_type bus_type; /* enum ec_bus_type */ |