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drivers/intel/usb4: Add Type-C port device attachment check

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When fwupd Retimer firmware update is enabled, it needs to
differentiate the Type-C port NDA and USB/DP/TBT/USB4 DA scenarios.
This change adds support to query devices attachment. If DA, it
deasserts the Retimer power and promptly returns -1 accordingly without
impacting the flow of Retimer firmware update under NDA. Additionally,
this patch deasserts the Retimer power during error conditions.

BUG=b:212235056, 224923449, 211790542
TEST=Validated Retimer firmware update under NDA and TBT3 docks
enumeration on Type-C ports under DA.

Change-Id: I5392d0d3a947dbf172cadfe03fc708f6e2e87210
Signed-off-by: John Zhao <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63848
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
John
2022-04-21 17:58:16 -07:00
committed by Felix Held
parent 3d51519685
commit 1dfed8fe38
2 changed files with 51 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
src/drivers/intel/usb4/retimer/retimer.c
View File

@@ -27,7 +27,8 @@ static const char *usb4_retimer_path_arg(const char *arg)
/* Each polling cycle takes up to 25 ms with a total of 12 of these iterations */
#define USB4_RETIMER_ITERATION_NUM 12
#define USB4_RETIMER_POLL_CYCLE_MS 25
static void usb4_retimer_execute_ec_cmd(uint8_t port, uint8_t cmd, uint8_t expected_value)
static void usb4_retimer_execute_ec_cmd(uint8_t port, uint8_t cmd, uint8_t expected_value,
struct acpi_gpio *power_gpio)
{
const char *RFWU = ec_retimer_fw_update_path();
const uint8_t data = cmd << USB_RETIMER_FW_UPDATE_OP_SHIFT | port;
@@ -36,6 +37,7 @@ static void usb4_retimer_execute_ec_cmd(uint8_t port, uint8_t cmd, uint8_t expec
ec_retimer_fw_update(data);
/* If RFWU has return value 0xfe, return error -1 */
acpigen_write_if_lequal_namestr_int(RFWU, USB_RETIMER_FW_UPDATE_ERROR);
acpigen_disable_tx_gpio(power_gpio);
acpigen_write_return_integer(-1);
acpigen_pop_len(); /* If */
@@ -49,7 +51,27 @@ static void usb4_retimer_execute_ec_cmd(uint8_t port, uint8_t cmd, uint8_t expec
acpigen_emit_byte(BREAK_OP);
acpigen_pop_len(); /* If */
if (cmd == USB_RETIMER_FW_UPDATE_SET_TBT) {
if (cmd == USB_RETIMER_FW_UPDATE_GET_MUX) {
acpigen_write_if_lequal_namestr_int(RFWU, USB_RETIMER_FW_UPDATE_INVALID_MUX);
acpigen_write_sleep(USB4_RETIMER_POLL_CYCLE_MS);
acpigen_emit_byte(DECREMENT_OP);
acpigen_emit_byte(LOCAL2_OP);
acpigen_emit_byte(CONTINUE_OP);
acpigen_pop_len(); /* If */
acpigen_emit_byte(AND_OP);
acpigen_emit_namestring(RFWU);
acpigen_write_integer(USB_RETIMER_FW_UPDATE_MUX_MASK);
acpigen_emit_byte(LOCAL3_OP);
acpigen_write_if();
acpigen_emit_byte(LNOT_OP);
acpigen_emit_byte(LEQUAL_OP);
acpigen_emit_byte(LOCAL3_OP);
acpigen_emit_byte(0);
acpigen_disable_tx_gpio(power_gpio);
acpigen_write_return_integer(-1);
acpigen_pop_len(); /* If */
} else if (cmd == USB_RETIMER_FW_UPDATE_SET_TBT) {
/*
* EC return either USB_PD_MUX_USB4_ENABLED or USB_PD_MUX_TBT_COMPAT_ENABLED
* to RFWU after the USB_RETIMER_FW_UPDATE_SET_TBT command execution. It is
@@ -70,6 +92,7 @@ static void usb4_retimer_execute_ec_cmd(uint8_t port, uint8_t cmd, uint8_t expec
* Return: -1 if timeout error occurring
*/
acpigen_write_if_lequal_op_int(LOCAL2_OP, 0);
acpigen_disable_tx_gpio(power_gpio);
acpigen_write_return_integer(-1);
acpigen_pop_len(); /* If */
}
@@ -97,7 +120,8 @@ static void enable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gp
* Otherwise proceed Retimer firmware upgrade operation.
*/
expected_value = USB_PD_MUX_NONE;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_GET_MUX, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_GET_MUX, expected_value,
power_gpio);
/*
* Suspend PD
@@ -105,7 +129,8 @@ static void enable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gp
* Expect return value: 0
*/
expected_value = 0;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SUSPEND_PD, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SUSPEND_PD, expected_value,
power_gpio);
/*
* Set MUX USB Mode
@@ -113,7 +138,8 @@ static void enable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gp
* Expect return value: USB_PD_MUX_USB_ENABLED
*/
expected_value = USB_PD_MUX_USB_ENABLED;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_USB, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_USB, expected_value,
power_gpio);
/*
* Set MUX Safe Mode
@@ -121,7 +147,8 @@ static void enable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gp
* Expect return value: USB_PD_MUX_SAFE_MODE
*/
expected_value = USB_PD_MUX_SAFE_MODE;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_SAFE, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_SAFE, expected_value,
power_gpio);
/*
* Set MUX TBT Mode
@@ -129,7 +156,8 @@ static void enable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gp
* Expect return value: USB_PD_MUX_USB4_ENABLED or USB_PD_MUX_TBT_COMPAT_ENABLED
*/
expected_value = USB_PD_MUX_USB4_ENABLED;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_TBT, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_SET_TBT, expected_value,
power_gpio);
}
static void disable_retimer_online_state(uint8_t port, struct acpi_gpio *power_gpio)
@@ -149,7 +177,8 @@ static void disable_retimer_online_state(uint8_t port, struct acpi_gpio *power_g
* Expect return value: 0
*/
expected_value = 0;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_DISCONNECT, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_DISCONNECT, expected_value,
power_gpio);
/*
* Resume PD
@@ -157,7 +186,8 @@ static void disable_retimer_online_state(uint8_t port, struct acpi_gpio *power_g
* Expect return value: 1
*/
expected_value = 1;
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_RESUME_PD, expected_value);
usb4_retimer_execute_ec_cmd(port, USB_RETIMER_FW_UPDATE_RESUME_PD, expected_value,
power_gpio);
/* Force power off */
acpigen_disable_tx_gpio(power_gpio);

10
src/drivers/intel/usb4/retimer/retimer.h
View File

@@ -6,12 +6,22 @@
/* Flags representing mux state */
#define USB_PD_MUX_NONE 0 /* Open switch */
#define USB_PD_MUX_USB_ENABLED BIT(0) /* USB connected */
#define USB_PD_MUX_DP_ENABLED BIT(1) /* DP connected */
#define USB_PD_MUX_SAFE_MODE BIT(5) /* DP is in safe mode */
#define USB_PD_MUX_TBT_COMPAT_ENABLED BIT(6) /* TBT compat enabled */
#define USB_PD_MUX_USB4_ENABLED BIT(7) /* USB4 enabled */
/* USB Retimer firmware update mux mask */
#define USB_RETIMER_FW_UPDATE_MUX_MASK (USB_PD_MUX_USB_ENABLED | \
USB_PD_MUX_DP_ENABLED | \
USB_PD_MUX_SAFE_MODE | \
USB_PD_MUX_TBT_COMPAT_ENABLED | \
USB_PD_MUX_USB4_ENABLED)
#define USB_RETIMER_FW_UPDATE_OP_SHIFT 4
#define USB_RETIMER_FW_UPDATE_ERROR 0xfe
#define USB_RETIMER_FW_UPDATE_INVALID_MUX 0xff
/* Retimer firmware update operations */
#define USB_RETIMER_FW_UPDATE_SUSPEND_PD 1 /* Suspend PD port */
#define USB_RETIMER_FW_UPDATE_RESUME_PD 2 /* Resume PD port */