diff options
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; +} + |