diff options
author | Todd Broch <tbroch@chromium.org> | 2014-09-11 15:42:38 -0700 |
---|---|---|
committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-09-23 06:28:48 +0000 |
commit | 53b6a345c8f7fecd8c8f8ea1e23870308dafdf44 (patch) | |
tree | 7c6f5d55c66fc3f42cad7c64f9ff6be9efb36204 /board/hoho/usb_pd_policy.c | |
parent | 4fda01ca91f8e4c50ecddb904b4794df40e4d49f (diff) | |
download | chrome-ec-53b6a345c8f7fecd8c8f8ea1e23870308dafdf44.tar.gz |
hoho: Enable USB PD support.
CL to allow hoho to receive initial USB PD communication (source
capabilities payload).
BRANCH=none
BUG=chrome-os-partner:31192
TEST=manual,
When attaching hoho to fruitpie and configured via
'pd dualrole source'
I see on hoho side:
--- UART initialized after reboot ---
[Reset cause: reset-pin power-on]
[Image: RO, hoho_v1.1.2213-2bf6a29-dirty 2014-09-15 12:10:22 tbroch@brisket.mtv.corp.google.com]
[0.000466 Inits done]
C0 st2
Console is enabled; type HELP for help.
> [0.250678 USB PD initialized]
C0 st3
[0.264629 PD TMOUT RX 1/1]
RX ERR (-1)
Request [1] 5V 3000mA
C0 st4
C0 st5
C0 st6
> pd 0 state
Port C0, Enabled - Role: SNK Polarity: CC2 State: SNK_READY
Change-Id: Ic5871946425f0ff12d717fbbbbb9e81c6b67cc6f
Signed-off-by: Todd Broch <tbroch@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/217977
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Diffstat (limited to 'board/hoho/usb_pd_policy.c')
-rw-r--r-- | board/hoho/usb_pd_policy.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/board/hoho/usb_pd_policy.c b/board/hoho/usb_pd_policy.c new file mode 100644 index 0000000000..57099a960d --- /dev/null +++ b/board/hoho/usb_pd_policy.c @@ -0,0 +1,90 @@ +/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "adc.h" +#include "board.h" +#include "common.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "registers.h" +#include "task.h" +#include "timer.h" +#include "util.h" +#include "usb_pd.h" + +#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) + +/* Source PDOs */ +const uint32_t pd_src_pdo[] = {}; +const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo); + +/* Fake PDOs : we just want our pre-defined voltages */ +const uint32_t pd_snk_pdo[] = { + PDO_FIXED(5000, 500, 0), +}; +const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo); + +/* Desired voltage requested as a sink (in millivolts) */ +static unsigned select_mv = 5000; + +int pd_choose_voltage(int cnt, uint32_t *src_caps, uint32_t *rdo) +{ + int i; + int ma; + int set_mv = select_mv; + + /* Default to 5V */ + if (set_mv <= 0) + set_mv = 5000; + + /* Get the selected voltage */ + for (i = cnt; i >= 0; i--) { + int mv = ((src_caps[i] >> 10) & 0x3FF) * 50; + int type = src_caps[i] & PDO_TYPE_MASK; + if ((mv == set_mv) && (type == PDO_TYPE_FIXED)) + break; + } + if (i < 0) + return -EC_ERROR_UNKNOWN; + + /* request all the power ... */ + ma = 10 * (src_caps[i] & 0x3FF); + *rdo = RDO_FIXED(i + 1, ma, ma, 0); + ccprintf("Request [%d] %dV %dmA\n", i, set_mv/1000, ma); + return ma; +} + +void pd_set_input_current_limit(uint32_t max_ma) +{ + /* No battery, nothing to do */ + return; +} + +void pd_set_max_voltage(unsigned mv) +{ + select_mv = mv; +} + +int requested_voltage_idx; +int pd_request_voltage(uint32_t rdo) +{ + return EC_SUCCESS; +} + +int pd_set_power_supply_ready(int port) +{ + return EC_SUCCESS; +} + +void pd_power_supply_reset(int port) +{ +} + +int pd_board_checks(void) +{ + return EC_SUCCESS; +} + |