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servo_micro: default to UART3 enabled

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This sets power on defaults for UART3 to be routed to
the glados style uart-on-jtag pinout. This is pretty
standardized going forward.

BUG=None
BRANCH=servo-9040.b
TEST=miniterm.py /dev/google/Servo_Micro-2-1.2/serial/Servo_UART3

Change-Id: I397df8fc09da681eba28cae489e2f6eaef8a87d0
Signed-off-by: Nick Sanders <nsanders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/813180
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
This commit is contained in:
Nick Sanders
2017-12-06 16:04:00 -08:00
committed by chrome-bot
parent ab238235f8
commit ee3cb8c898
2 changed files with 23 additions and 6 deletions
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17
board/servo_micro/board.c
View File

@@ -271,5 +271,22 @@ static void board_init(void)
/* Structured enpoints */
usb_spi_enable(&usb_spi, 1);
/* Enable UARTs by default. */
gpio_set_level(GPIO_UART1_EN_L, 0);
gpio_set_level(GPIO_UART2_EN_L, 0);
/* Disable power output. */
gpio_set_level(GPIO_SPI1_VREF_18, 0);
gpio_set_level(GPIO_SPI1_VREF_33, 0);
gpio_set_level(GPIO_SPI2_VREF_18, 0);
gpio_set_level(GPIO_SPI2_VREF_33, 0);
/* Enable UART3 routing. */
gpio_set_level(GPIO_SPI1_MUX_SEL, 1);
gpio_set_level(GPIO_SPI1_BUF_EN_L, 1);
gpio_set_level(GPIO_JTAG_BUFIN_EN_L, 0);
gpio_set_level(GPIO_SERVO_JTAG_TDO_BUFFER_EN, 1);
gpio_set_level(GPIO_SERVO_JTAG_TDO_SEL, 1);
gpio_set_flags(GPIO_UART3_RX_JTAG_BUFFER_TO_SERVO_TDO, GPIO_ALTERNATE);
gpio_set_flags(GPIO_UART3_TX_SERVO_JTAG_TCK, GPIO_ALTERNATE);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);

12
board/servo_micro/gpio.inc
View File

@@ -20,17 +20,17 @@ GPIO(SERVO_JTAG_TRST_DIR, PIN(B, 6), GPIO_OUT_HIGH)
GPIO(SERVO_JTAG_TDI_DIR, PIN(B, 7), GPIO_OUT_HIGH)
GPIO(TCA6416_RESET_L, PIN(C, 13), GPIO_OUT_LOW)
GPIO(SPI1_MUX_SEL, PIN(A, 5), GPIO_OUT_LOW)
GPIO(SPI1_MUX_SEL, PIN(A, 5), GPIO_OUT_HIGH)
GPIO(SERVO_JTAG_TMS_DIR, PIN(C, 14), GPIO_OUT_LOW)
GPIO(SERVO_JTAG_TDO_SEL, PIN(C, 15), GPIO_OUT_LOW)
GPIO(SERVO_JTAG_TDO_SEL, PIN(C, 15), GPIO_OUT_HIGH)
GPIO(JTAG_BUFOUT_EN_L, PIN(F, 0), GPIO_OUT_HIGH)
GPIO(JTAG_BUFIN_EN_L, PIN(F, 1), GPIO_OUT_HIGH)
GPIO(JTAG_BUFIN_EN_L, PIN(F, 1), GPIO_OUT_LOW)
/* Inputs */
GPIO(SERVO_JTAG_TMS, PIN(A, 4), GPIO_INPUT)
GPIO(UART3_TX_SERVO_JTAG_TCK, PIN(A, 0), GPIO_INPUT)
GPIO(UART3_RX_JTAG_BUFFER_TO_SERVO_TDO, PIN(A, 1), GPIO_INPUT)
GPIO(SERVO_JTAG_TDO_BUFFER_EN, PIN(A, 6), GPIO_INPUT)
GPIO(UART3_TX_SERVO_JTAG_TCK, PIN(A, 0), GPIO_ALTERNATE)
GPIO(UART3_RX_JTAG_BUFFER_TO_SERVO_TDO, PIN(A, 1), GPIO_ALTERNATE)
GPIO(SERVO_JTAG_TDO_BUFFER_EN, PIN(A, 6), GPIO_OUT_HIGH)
GPIO(SERVO_JTAG_TDI, PIN(A, 7), GPIO_INPUT)
GPIO(SERVO_JTAG_RTCK, PIN(B, 1), GPIO_INPUT)