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/* Copyright 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.
*
* Test USB PD module.
*/
#include "common.h"
#include "crc.h"
#include "task.h"
#include "test_util.h"
#include "timer.h"
#include "usb_pd.h"
#include "usb_pd_test_util.h"
#include "util.h"
#define PORT0 0
#define PORT1 1
struct pd_port_t {
int host_mode;
int has_vbus;
int msg_tx_id;
int msg_rx_id;
int polarity;
int partner_role; /* -1 for none */
int partner_polarity;
} pd_port[CONFIG_USB_PD_PORT_COUNT];
static int give_back_called;
/* Mock functions */
int pd_adc_read(int port, int cc)
{
if (pd_port[port].host_mode &&
pd_port[port].partner_role == PD_ROLE_SINK)
/* we are source connected to sink, return Rd/Open */
return (pd_port[port].partner_polarity == cc) ? 400 : 3000;
else if (!pd_port[port].host_mode &&
pd_port[port].partner_role == PD_ROLE_SOURCE)
/* we are sink connected to source, return Rp/Open */
return (pd_port[port].partner_polarity == cc) ? 1700 : 0;
else if (pd_port[port].host_mode)
/* no sink on the other side, both CC are opened */
return 3000;
else if (!pd_port[port].host_mode)
/* no source on the other side, both CC are opened */
return 0;
/* should never get here */
return 0;
}
int pd_snk_is_vbus_provided(int port)
{
return pd_port[port].has_vbus;
}
void pd_set_host_mode(int port, int enable)
{
pd_port[port].host_mode = enable;
}
void pd_select_polarity(int port, int polarity)
{
pd_port[port].polarity = polarity;
}
int pd_vdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload)
{
return 0;
}
int board_select_rp_value(int port, int rp)
{
return 0;
}
/* Tests */
void inc_tx_id(int port)
{
pd_port[port].msg_tx_id = (pd_port[port].msg_tx_id + 1) % 7;
}
void inc_rx_id(int port)
{
pd_port[port].msg_rx_id = (pd_port[port].msg_rx_id + 1) % 7;
}
static void init_ports(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; ++i) {
pd_port[i].host_mode = 0;
pd_port[i].partner_role = -1;
pd_port[i].has_vbus = 0;
}
}
static void simulate_rx_msg(int port, uint16_t header, int cnt,
const uint32_t *data)
{
int i;
pd_test_rx_set_preamble(port, 1);
pd_test_rx_msg_append_sop(port);
pd_test_rx_msg_append_short(port, header);
crc32_init();
crc32_hash16(header);
for (i = 0; i < cnt; ++i) {
pd_test_rx_msg_append_word(port, data[i]);
crc32_hash32(data[i]);
}
pd_test_rx_msg_append_word(port, crc32_result());
pd_test_rx_msg_append_eop(port);
pd_test_rx_msg_append_last_edge(port);
pd_simulate_rx(port);
}
static void simulate_wait(int port)
{
uint16_t header = PD_HEADER(PD_CTRL_WAIT, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id,
0);
simulate_rx_msg(port, header, 0, NULL);
}
static void simulate_accept(int port)
{
uint16_t header = PD_HEADER(PD_CTRL_ACCEPT, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id,
0);
simulate_rx_msg(port, header, 0, NULL);
}
static void simulate_reject(int port)
{
uint16_t header = PD_HEADER(PD_CTRL_REJECT, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id,
0);
simulate_rx_msg(port, header, 0, NULL);
}
static void simulate_source_cap(int port, uint32_t cnt)
{
uint32_t src_pdo_cnt = (cnt == 0) ? 1 : pd_src_pdo_cnt;
uint16_t header = PD_HEADER(PD_DATA_SOURCE_CAP, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id,
src_pdo_cnt);
simulate_rx_msg(port, header, src_pdo_cnt, pd_src_pdo);
}
static void simulate_goodcrc(int port, int role, int id)
{
simulate_rx_msg(port, PD_HEADER(PD_CTRL_GOOD_CRC, role, role, id, 0),
0, NULL);
}
static int verify_goodcrc(int port, int role, int id)
{
return pd_test_tx_msg_verify_sop(port) &&
pd_test_tx_msg_verify_short(port, PD_HEADER(PD_CTRL_GOOD_CRC,
role, role, id, 0)) &&
pd_test_tx_msg_verify_crc(port) &&
pd_test_tx_msg_verify_eop(port);
}
static void plug_in_source(int port, int polarity)
{
pd_port[port].has_vbus = 1;
pd_port[port].partner_role = PD_ROLE_SOURCE;
pd_port[port].partner_polarity = polarity;
}
static void plug_in_sink(int port, int polarity)
{
pd_port[port].has_vbus = 0;
pd_port[port].partner_role = PD_ROLE_SINK;
pd_port[port].partner_polarity = polarity;
}
static void unplug(int port)
{
pd_port[port].msg_tx_id = 0;
pd_port[port].msg_rx_id = 0;
pd_port[port].has_vbus = 0;
pd_port[port].partner_role = -1;
task_wake(PD_PORT_TO_TASK_ID(port));
usleep(30 * MSEC);
}
void pd_snk_give_back(int port, uint32_t * const ma, uint32_t * const mv)
{
if (*ma == 3000)
give_back_called = 1;
}
static void simulate_ps_rdy(int port)
{
uint16_t header = PD_HEADER(PD_CTRL_PS_RDY, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id,
0);
simulate_rx_msg(port, header, 0, NULL);
}
static void simulate_goto_min(int port)
{
uint16_t header = PD_HEADER(PD_CTRL_GOTO_MIN, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_rx_id, 0);
simulate_rx_msg(port, header, 0, NULL);
}
static int test_request_with_wait_and_contract(void)
{
#ifdef CONFIG_USB_PD_GIVE_BACK
uint32_t expected_rdo =
RDO_FIXED(2, 3000, PD_MIN_CURRENT_MA, RDO_GIVE_BACK);
#else
uint32_t expected_rdo = RDO_FIXED(2, 3000, 3000, 0);
#endif
uint8_t port = PORT0;
plug_in_source(port, 0);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(2 * PD_T_CC_DEBOUNCE + 100 * MSEC);
TEST_ASSERT(pd_port[port].polarity == 0);
/* We're in SNK_DISCOVERY now. Let's send the source cap. */
simulate_source_cap(port, 1);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port, PD_ROLE_SINK,
pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request was good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're in SNK_REQUESTED. Send accept */
simulate_accept(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
/*
* We're in SNK_TRANSITION.
* And we have an explicit power contract.
*/
simulate_source_cap(port, 1);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port, PD_ROLE_SINK,
pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request was good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're in SNK_REQUESTED. Send wait */
simulate_wait(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
/* PD_T_SINK_REQUEST. Request is sent again after 100 ms */
task_wait_event(100 * MSEC);
inc_rx_id(port);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* We had an explicit contract. So request should have been resent. */
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request was good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're in SNK_REQUESTED. Send accept */
simulate_accept(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
/* We're in SNK_TRANSITION. Send ps_rdy */
simulate_ps_rdy(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
/* We're in SNK_READY. Send goto_min */
simulate_goto_min(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
#ifdef CONFIG_USB_PD_GIVE_BACK
TEST_ASSERT(give_back_called);
#else
TEST_ASSERT(!give_back_called);
#endif
/* We're done */
unplug(port);
return EC_SUCCESS;
}
static int test_request_with_wait(void)
{
#ifdef CONFIG_USB_PD_GIVE_BACK
uint32_t expected_rdo = RDO_FIXED(1, 900, PD_MIN_CURRENT_MA,
RDO_CAP_MISMATCH | RDO_GIVE_BACK);
#else
uint32_t expected_rdo = RDO_FIXED(1, 900, 900, RDO_CAP_MISMATCH);
#endif
uint8_t port = PORT0;
plug_in_source(port, 0);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(2 * PD_T_CC_DEBOUNCE + 100 * MSEC);
TEST_ASSERT(pd_port[port].polarity == 0);
/* We're in SNK_DISCOVERY now. Let's send the source cap. */
simulate_source_cap(port, 0);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port,
PD_ROLE_SINK, pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request is good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(0));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're in SNK_REQUESTED. Send wait */
simulate_wait(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
/* We didn't have an explicit contract. So we're in SNK_DISCOVERY. */
/* Resend Source Cap. */
simulate_source_cap(port, 0);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port,
PD_ROLE_SINK, pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request was good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're done */
unplug(port);
return EC_SUCCESS;
}
static int test_request_with_reject(void)
{
#ifdef CONFIG_USB_PD_GIVE_BACK
uint32_t expected_rdo = RDO_FIXED(1, 900, PD_MIN_CURRENT_MA,
RDO_CAP_MISMATCH | RDO_GIVE_BACK);
#else
uint32_t expected_rdo = RDO_FIXED(1, 900, 900, RDO_CAP_MISMATCH);
#endif
uint8_t port = PORT0;
plug_in_source(port, 0);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(2 * PD_T_CC_DEBOUNCE + 100 * MSEC);
TEST_ASSERT(pd_port[port].polarity == 0);
/* We're in SNK_DISCOVERY now. Let's send the source cap. */
simulate_source_cap(port, 0);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port,
PD_ROLE_SINK, pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request is good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(0));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're in SNK_REQUESTED. Send reject */
simulate_reject(port);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(0, PD_ROLE_SINK, pd_port[port].msg_rx_id));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_rx_id(port);
/* We're in SNK_READY. Send source cap. again. */
simulate_source_cap(port, 0);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port,
PD_ROLE_SINK, pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
/* We're done */
unplug(port);
return EC_SUCCESS;
}
static int test_request(void)
{
#ifdef CONFIG_USB_PD_GIVE_BACK
uint32_t expected_rdo = RDO_FIXED(1, 900, PD_MIN_CURRENT_MA,
RDO_CAP_MISMATCH | RDO_GIVE_BACK);
#else
uint32_t expected_rdo = RDO_FIXED(1, 900, 900, RDO_CAP_MISMATCH);
#endif
uint8_t port = PORT0;
plug_in_source(port, 0);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(2 * PD_T_CC_DEBOUNCE + 100 * MSEC);
TEST_ASSERT(pd_port[port].polarity == 0);
/* We're in SNK_DISCOVERY now. Let's send the source cap. */
simulate_source_cap(port, 0);
task_wait_event(30 * MSEC);
TEST_ASSERT(verify_goodcrc(port,
PD_ROLE_SINK, pd_port[port].msg_rx_id));
/* Wait for the power request */
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(35 * MSEC); /* tSenderResponse: 24~30 ms */
inc_rx_id(port);
/* Process the request */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_REQUEST, PD_ROLE_SINK, PD_ROLE_UFP,
pd_port[port].msg_tx_id, 1)));
TEST_ASSERT(pd_test_tx_msg_verify_word(port, expected_rdo));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
/* Request was good. Send GoodCRC */
simulate_goodcrc(port, PD_ROLE_SOURCE, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(30 * MSEC);
inc_tx_id(port);
/* We're done */
unplug(port);
return EC_SUCCESS;
}
static int test_sink(void)
{
int i;
uint8_t port = PORT1;
plug_in_sink(port, 1);
task_wake(PD_PORT_TO_TASK_ID(port));
task_wait_event(250 * MSEC); /* tTypeCSinkWaitCap: 210~250 ms */
TEST_ASSERT(pd_port[port].polarity == 1);
/* The source cap should be sent */
TEST_ASSERT(pd_test_tx_msg_verify_sop(port));
TEST_ASSERT(pd_test_tx_msg_verify_short(port,
PD_HEADER(PD_DATA_SOURCE_CAP, PD_ROLE_SOURCE,
PD_ROLE_DFP, pd_port[port].msg_tx_id,
pd_src_pdo_cnt)));
for (i = 0; i < pd_src_pdo_cnt; ++i)
TEST_ASSERT(pd_test_tx_msg_verify_word(port, pd_src_pdo[i]));
TEST_ASSERT(pd_test_tx_msg_verify_crc(port));
TEST_ASSERT(pd_test_tx_msg_verify_eop(port));
/* Looks good. Ack the source cap. */
simulate_goodcrc(port, PD_ROLE_SINK, pd_port[port].msg_tx_id);
task_wake(PD_PORT_TO_TASK_ID(port));
usleep(30 * MSEC);
inc_tx_id(port);
/* We're done */
unplug(port);
return EC_SUCCESS;
}
void run_test(void)
{
test_reset();
init_ports();
pd_set_dual_role(PD_DRP_TOGGLE_ON);
RUN_TEST(test_request);
RUN_TEST(test_sink);
RUN_TEST(test_request_with_wait);
RUN_TEST(test_request_with_wait_and_contract);
RUN_TEST(test_request_with_reject);
test_print_result();
}
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