diff options
| author | Ruibin Chang <ruibin.chang@ite.com.tw> | 2020-07-21 14:32:35 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-07-23 06:58:02 +0000 |
| commit | 0f982a35e978febfc1bab45d1afc048e0c78968a (patch) | |
| tree | 3c28abbc9e7b59360f5bb4136b59a07de9fd459e /driver/tcpm/it8xxx2.c | |
| parent | 45563a8fc966d6ba9d6788d8ab04dcfdf71a669d (diff) | |
| download | chrome-ec-0f982a35e978febfc1bab45d1afc048e0c78968a.tar.gz | |
chip/it8320, it81202: Implement fast role swap function
Implement fast role swap function from initial SNK to new SRC
for chip it8320 and it81202.
BUG=none
BRANCH=none
TEST=1.When we detect FRS cc low signal, we can output properly
GPIO signal.
2.FRS false-positives test: PD traffic(ex.power nego,
data and power swap, soft and hard reset) on the CC line
after FRS is enabled.
Change-Id: I3a7bc6a684e57fb19e50c41305751b2fca1ffe2d
Signed-off-by: Ruibin Chang <Ruibin.Chang@ite.com.tw>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1786462
Reviewed-by: Diana Z <dzigterman@chromium.org>
Diffstat (limited to 'driver/tcpm/it8xxx2.c')
| -rw-r--r-- | driver/tcpm/it8xxx2.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/driver/tcpm/it8xxx2.c b/driver/tcpm/it8xxx2.c index 82a903a272..10ca883c10 100644 --- a/driver/tcpm/it8xxx2.c +++ b/driver/tcpm/it8xxx2.c @@ -585,6 +585,48 @@ static int it83xx_tcpm_get_chip_info(int port, int live, return EC_SUCCESS; } +#ifdef CONFIG_USB_PD_FRS_TCPC +static int it83xx_tcpm_set_frs_enable(int port, int enable) +{ + uint8_t mask = (USBPD_REG_FAST_SWAP_REQUEST_ENABLE | + USBPD_REG_FAST_SWAP_DETECT_ENABLE); + + if (enable) { + /* + * Disable HW auto turn off FRS requestion and detection + * when we receive soft or hard reset. + */ + IT83XX_USBPD_PDMSR(port) &= ~USBPD_REG_MASK_AUTO_FRS_DISABLE; + /* W/C status */ + IT83XX_USBPD_IFS(port) = 0x33; + /* Enable FRS detection (cc to GND) interrupt */ + IT83XX_USBPD_MIFS(port) &= ~(USBPD_REG_MASK_FAST_SWAP_ISR | + USBPD_REG_MASK_FAST_SWAP_DETECT_ISR); + /* Enable FRS detection (cc to GND) */ + IT83XX_USBPD_PDFSCR(port) = (IT83XX_USBPD_PDFSCR(port) & ~mask) + | USBPD_REG_FAST_SWAP_DETECT_ENABLE; + /* + * TODO(b/160210457): Enable HW auto trigger + * GPH3(port0)/GPH4(port1) output H/L after we detect FRS cc + * low signal. + */ + } else { + /* Disable FRS detection (cc to GND) interrupt */ + IT83XX_USBPD_MIFS(port) |= (USBPD_REG_MASK_FAST_SWAP_ISR | + USBPD_REG_MASK_FAST_SWAP_DETECT_ISR); + /* Disable FRS detection and requestion */ + IT83XX_USBPD_PDFSCR(port) &= ~mask; + /* + * TODO(b/160210457): Disable HW auto trigger + * GPH3(port0)/GPH4(port1) output H/L after we detect FRS cc + * low signal. + */ + } + + return EC_SUCCESS; +} +#endif + static void it83xx_init(enum usbpd_port port, int role) { uint8_t cc_config = (port == USBPD_PORT_C ? @@ -675,4 +717,7 @@ const struct tcpm_drv it83xx_tcpm_drv = { .get_message_raw = &it83xx_tcpm_get_message_raw, .transmit = &it83xx_tcpm_transmit, .get_chip_info = &it83xx_tcpm_get_chip_info, +#ifdef CONFIG_USB_PD_FRS_TCPC + .set_frs_enable = &it83xx_tcpm_set_frs_enable, +#endif }; |