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author | Vincent Palatin <vpalatin@chromium.org> | 2015-06-15 16:55:08 -0700 |
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committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-06-24 00:04:42 +0000 |
commit | 5aadcd90d8ecb79d15dae6d5f0b4567a678e8d8c (patch) | |
tree | 6b3720be9d091a6beecdaf5a254cbe047a94dada /board/pdeval-stm32f072/usb_pd_policy.c | |
parent | 43db8410667de672369c794fd9b16e40fcded85c (diff) | |
download | chrome-ec-5aadcd90d8ecb79d15dae6d5f0b4567a678e8d8c.tar.gz |
Add board for USB PD chip evaluation
Base board configuration to evaluate USB PD interface chip by
connecting them a STM32F072 Discovery board.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=chrome-os-partner:41497
TEST=Flash the STM32F072 discovery using the following command:
make flash BOARD=pdeval-stm32f072
then connect to the EC console through the USB port.
Change-Id: Ie3f5dcd04c077be49fbacc020f7af4f298039e8a
Reviewed-on: https://chromium-review.googlesource.com/277713
Tested-by: Alec Berg <alecaberg@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Commit-Queue: Alec Berg <alecaberg@chromium.org>
Diffstat (limited to 'board/pdeval-stm32f072/usb_pd_policy.c')
-rw-r--r-- | board/pdeval-stm32f072/usb_pd_policy.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/board/pdeval-stm32f072/usb_pd_policy.c b/board/pdeval-stm32f072/usb_pd_policy.c new file mode 100644 index 0000000000..35762bde39 --- /dev/null +++ b/board/pdeval-stm32f072/usb_pd_policy.c @@ -0,0 +1,334 @@ +/* Copyright 2015 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 "common.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "registers.h" +#include "system.h" +#include "task.h" +#include "timer.h" +#include "util.h" +#include "usb_pd.h" + +#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args) +#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) + +#define PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP) + +/* Used to fake VBUS presence since no GPIO is available to read VBUS */ +static int vbus_present; + +const uint32_t pd_src_pdo[] = { + PDO_FIXED(5000, 1500, PDO_FIXED_FLAGS), +}; +const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo); + +const uint32_t pd_snk_pdo[] = { + PDO_FIXED(5000, 500, PDO_FIXED_FLAGS), + PDO_BATT(5000, 20000, 15000), + PDO_VAR(5000, 20000, 3000), +}; +const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo); + +int pd_is_valid_input_voltage(int mv) +{ + return 1; +} + +int pd_check_requested_voltage(uint32_t rdo) +{ + int max_ma = rdo & 0x3FF; + int op_ma = (rdo >> 10) & 0x3FF; + int idx = rdo >> 28; + uint32_t pdo; + uint32_t pdo_ma; + + if (!idx || idx > pd_src_pdo_cnt) + return EC_ERROR_INVAL; /* Invalid index */ + + /* check current ... */ + pdo = pd_src_pdo[idx - 1]; + pdo_ma = (pdo & 0x3ff); + if (op_ma > pdo_ma) + return EC_ERROR_INVAL; /* too much op current */ + if (max_ma > pdo_ma) + return EC_ERROR_INVAL; /* too much max current */ + + CPRINTF("Requested %d V %d mA (for %d/%d mA)\n", + ((pdo >> 10) & 0x3ff) * 50, (pdo & 0x3ff) * 10, + ((rdo >> 10) & 0x3ff) * 10, (rdo & 0x3ff) * 10); + + return EC_SUCCESS; +} + +void pd_transition_voltage(int idx) +{ + /* No-operation: we are always 5V */ +} + +int pd_set_power_supply_ready(int port) +{ + /* Turn on the "up" LED when we output VBUS */ + gpio_set_level(GPIO_LED_U, 1); + CPRINTS("Power supply ready/%d", port); + return EC_SUCCESS; /* we are ready */ +} + +void pd_power_supply_reset(int port) +{ + /* Turn off the "up" LED when we shutdown VBUS */ + gpio_set_level(GPIO_LED_U, 0); + /* Disable VBUS */ + CPRINTS("Disable VBUS", port); +} + +void pd_set_input_current_limit(int port, uint32_t max_ma, + uint32_t supply_voltage) +{ + CPRINTS("USBPD current limit port %d max %d mA %d mV", + port, max_ma, supply_voltage); + /* do some LED coding of the power we can sink */ + if (max_ma) { + if (supply_voltage > 6500) + gpio_set_level(GPIO_LED_R, 1); + else + gpio_set_level(GPIO_LED_L, 1); + } else { + gpio_set_level(GPIO_LED_L, 0); + gpio_set_level(GPIO_LED_R, 0); + } +} + +void typec_set_input_current_limit(int port, uint32_t max_ma, + uint32_t supply_voltage) +{ + CPRINTS("TYPEC current limit port %d max %d mA %d mV", + port, max_ma, supply_voltage); + gpio_set_level(GPIO_LED_R, !!max_ma); +} + +void button_event(enum gpio_signal signal) +{ + vbus_present = !vbus_present; + CPRINTS("VBUS %d", vbus_present); +} + +static int command_vbus_toggle(int argc, char **argv) +{ + vbus_present = !vbus_present; + CPRINTS("VBUS %d", vbus_present); + + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(vbus, command_vbus_toggle, + "", + "Toggle VBUS detected", + NULL); + +int pd_snk_is_vbus_provided(int port) +{ + return vbus_present; +} + +int pd_board_checks(void) +{ + return EC_SUCCESS; +} + +int pd_check_power_swap(int port) +{ + /* + * Allow power swap as long as we are acting as a dual role device, + * otherwise assume our role is fixed (not in S0 or console command + * to fix our role). + */ + return pd_get_dual_role() == PD_DRP_TOGGLE_ON ? 1 : 0; +} + +int pd_check_data_swap(int port, int data_role) +{ + /* Always allow data swap */ + return 1; +} + +void pd_execute_data_swap(int port, int data_role) +{ +} + +void pd_check_pr_role(int port, int pr_role, int flags) +{ +} + +void pd_check_dr_role(int port, int dr_role, int flags) +{ +} +/* ----------------- Vendor Defined Messages ------------------ */ +const struct svdm_response svdm_rsp = { + .identity = NULL, + .svids = NULL, + .modes = NULL, +}; + +int pd_custom_vdm(int port, int cnt, uint32_t *payload, + uint32_t **rpayload) +{ + int cmd = PD_VDO_CMD(payload[0]); + uint16_t dev_id = 0; + int is_rw; + + /* make sure we have some payload */ + if (cnt == 0) + return 0; + + switch (cmd) { + case VDO_CMD_VERSION: + /* guarantee last byte of payload is null character */ + *(payload + cnt - 1) = 0; + CPRINTF("version: %s\n", (char *)(payload+1)); + break; + case VDO_CMD_READ_INFO: + case VDO_CMD_SEND_INFO: + /* copy hash */ + if (cnt == 7) { + dev_id = VDO_INFO_HW_DEV_ID(payload[6]); + is_rw = VDO_INFO_IS_RW(payload[6]); + + CPRINTF("DevId:%d.%d SW:%d RW:%d\n", + HW_DEV_ID_MAJ(dev_id), + HW_DEV_ID_MIN(dev_id), + VDO_INFO_SW_DBG_VER(payload[6]), + is_rw); + } else if (cnt == 6) { + /* really old devices don't have last byte */ + pd_dev_store_rw_hash(port, dev_id, payload + 1, + SYSTEM_IMAGE_UNKNOWN); + } + break; + } + + return 0; +} + +#ifdef CONFIG_USB_PD_ALT_MODE_DFP +static int dp_flags[CONFIG_USB_PD_PORT_COUNT]; + +static void svdm_safe_dp_mode(int port) +{ + /* make DP interface safe until configure */ + dp_flags[port] = 0; + /* board_set_usb_mux(port, TYPEC_MUX_NONE, pd_get_polarity(port)); */ +} + +static int svdm_enter_dp_mode(int port, uint32_t mode_caps) +{ + /* Only enter mode if device is DFP_D capable */ + if (mode_caps & MODE_DP_SNK) { + svdm_safe_dp_mode(port); + return 0; + } + + return -1; +} + +static int svdm_dp_status(int port, uint32_t *payload) +{ + int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT); + payload[0] = VDO(USB_SID_DISPLAYPORT, 1, + CMD_DP_STATUS | VDO_OPOS(opos)); + payload[1] = VDO_DP_STATUS(0, /* HPD IRQ ... not applicable */ + 0, /* HPD level ... not applicable */ + 0, /* exit DP? ... no */ + 0, /* usb mode? ... no */ + 0, /* multi-function ... no */ + (!!(dp_flags[port] & DP_FLAGS_DP_ON)), + 0, /* power low? ... no */ + (!!(dp_flags[port] & DP_FLAGS_DP_ON))); + return 2; +}; + +static int svdm_dp_config(int port, uint32_t *payload) +{ + int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT); + /* board_set_usb_mux(port, TYPEC_MUX_DP, pd_get_polarity(port)); */ + payload[0] = VDO(USB_SID_DISPLAYPORT, 1, + CMD_DP_CONFIG | VDO_OPOS(opos)); + payload[1] = VDO_DP_CFG(MODE_DP_PIN_E, /* pin mode */ + 1, /* DPv1.3 signaling */ + 2); /* UFP connected */ + return 2; +}; + +static void svdm_dp_post_config(int port) +{ + dp_flags[port] |= DP_FLAGS_DP_ON; + if (!(dp_flags[port] & DP_FLAGS_HPD_HI_PENDING)) + return; +} + +static int svdm_dp_attention(int port, uint32_t *payload) +{ + /* ack */ + return 1; +} + +static void svdm_exit_dp_mode(int port) +{ + svdm_safe_dp_mode(port); + /* gpio_set_level(PORT_TO_HPD(port), 0); */ +} + +static int svdm_enter_gfu_mode(int port, uint32_t mode_caps) +{ + /* Always enter GFU mode */ + return 0; +} + +static void svdm_exit_gfu_mode(int port) +{ +} + +static int svdm_gfu_status(int port, uint32_t *payload) +{ + /* + * This is called after enter mode is successful, send unstructured + * VDM to read info. + */ + pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_READ_INFO, NULL, 0); + return 0; +} + +static int svdm_gfu_config(int port, uint32_t *payload) +{ + return 0; +} + +static int svdm_gfu_attention(int port, uint32_t *payload) +{ + return 0; +} + +const struct svdm_amode_fx supported_modes[] = { + { + .svid = USB_SID_DISPLAYPORT, + .enter = &svdm_enter_dp_mode, + .status = &svdm_dp_status, + .config = &svdm_dp_config, + .post_config = &svdm_dp_post_config, + .attention = &svdm_dp_attention, + .exit = &svdm_exit_dp_mode, + }, + { + .svid = USB_VID_GOOGLE, + .enter = &svdm_enter_gfu_mode, + .status = &svdm_gfu_status, + .config = &svdm_gfu_config, + .attention = &svdm_gfu_attention, + .exit = &svdm_exit_gfu_mode, + } +}; +const int supported_modes_cnt = ARRAY_SIZE(supported_modes); +#endif /* CONFIG_USB_PD_ALT_MODE_DFP */ |