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tcpm: anx74xx: Initialize regs for proper CC cye diagram

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BUG=chrome-os-partner:56788
BRANCH=None
TEST=Verify CC eye diagram looks better.

Change-Id: I4880e81b0a4737a303027513e77c9a66845472e2
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/380352
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Kevin K Wong <kevin.k.wong@intel.com>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-09-02 11:16:12 -07:00
committed by chrome-bot
parent 838babebd9
commit a87663f6dc
2 changed files with 23 additions and 2 deletions
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24
driver/tcpm/anx74xx.c
View File

@@ -150,10 +150,17 @@ static int anx74xx_tcpm_mux_exit(int port)
rv = tcpc_read(port, ANX74XX_REG_ANALOG_CTRL_2, &reg);
if (rv)
return EC_ERROR_UNKNOWN;
rv |= tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_2, reg | ANX74XX_REG_MODE_TRANS);
/* Clear Bit[7:0] R_SWITCH */
rv |= tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_1, 0x0);
rv |= tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_5, 0x04);
/* Clear Bit[7:4] R_SWITCH_H */
rv |= tcpc_read(port, ANX74XX_REG_ANALOG_CTRL_5, &reg);
if (rv)
return EC_ERROR_UNKNOWN;
rv |= tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_5, (reg & 0x0f));
rv |= tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_2, reg & 0x09);
if (rv)
return EC_ERROR_UNKNOWN;
@@ -845,6 +852,14 @@ int anx74xx_tcpm_init(int port)
/* HPD pin output enable*/
rv |= tcpc_write(port, ANX74XX_REG_HPD_CTRL_0, ANX74XX_REG_HPD_DEFAULT);
if (rv)
return EC_ERROR_UNKNOWN;
/* Set AVDD10_BMC to 1.08 */
rv |= tcpc_read(port, ANX74XX_REG_ANALOG_CTRL_5, &reg);
if (rv)
return EC_ERROR_UNKNOWN;
rv = tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_5, (reg & 0xf3));
if (rv)
return EC_ERROR_UNKNOWN;
@@ -856,6 +871,11 @@ int anx74xx_tcpm_init(int port)
if (rv)
return EC_ERROR_UNKNOWN;
/* Set BMC TX cap slew rate to 400ns */
rv = tcpc_write(port, ANX74XX_REG_ANALOG_CTRL_12, 0x4);
if (rv)
return EC_ERROR_UNKNOWN;
#ifdef CONFIG_USB_PD_TCPC_FW_VERSION
board_print_tcpc_fw_version(port);
#endif

1
driver/tcpm/anx74xx.h
View File

@@ -82,6 +82,7 @@
#define ANX74XX_REG_AUX_SWAP_SET_CC2 0xc0
#define ANX74XX_REG_ANALOG_CTRL_11 0x4c
#define ANX74XX_REG_ANALOG_CTRL_12 0x4d
#define ANX74XX_REG_MUX_DP_MODE_ACE_CC1 0x49
#define ANX74XX_REG_MUX_DP_MODE_ACE_CC2 0x86