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| author | Lee Leahy <leroy.p.leahy@intel.com> | 2016-05-30 15:01:06 -0700 |
|---|---|---|
| committer | Leroy P Leahy <leroy.p.leahy@intel.com> | 2016-05-31 22:11:51 +0200 |
| commit | bc518d5cab4234a0d0d06a7d3829bbca9e318ba6 (patch) | |
| tree | 09eb5cf6c3476c17ca34fde7164d14c2f2ec3b0b /src/mainboard/intel/galileo/gen2.h | |
| parent | ac78db3a53a7653a73409936455d68c754291e9d (diff) | |
| download | coreboot-bc518d5cab4234a0d0d06a7d3829bbca9e318ba6.tar.xz | |
quark: Enable HSUART0 as console
The use of HSUART0 on galileo requires early initialization of the I2C
GPIO expanders to direct the RXD and TXD signals to DIGITAL 0 and 1
on the expansion connector.
TEST=None
Change-Id: I11195d79e954c1f6bc91eafe257d7ddc1310b2e7
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/15010
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/mainboard/intel/galileo/gen2.h')
| -rw-r--r-- | src/mainboard/intel/galileo/gen2.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/mainboard/intel/galileo/gen2.h b/src/mainboard/intel/galileo/gen2.h index 8eee744392..10c832198e 100644 --- a/src/mainboard/intel/galileo/gen2.h +++ b/src/mainboard/intel/galileo/gen2.h @@ -52,6 +52,28 @@ static const struct reg_script gen2_gpio_init[] = { REG_SCRIPT_END }; +static const struct reg_script gen2_hsuart0[] = { + /* Route UART0_TXD to MUX7_Y -> BUF_IO1 -> IO1 -> DIGITAL 1 + * Set MUX7_SEL (EXP1.P1_5) high + * Configure MUX7_SEL (EXP1.P1_5) as an output + * Set LVL_B_OE6_N (EXP0.P1_4) low + * Configure LVL_B_OE6_N (EXP0.P1_4) as an output + */ + REG_I2C_OR(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_OUTPUT1, BIT5), + REG_I2C_AND(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_CONFIG1, ~BIT5), + REG_I2C_AND(GEN2_I2C_GPIO_EXP0, GEN2_GPIO_EXP_OUTPUT1, ~BIT4), + REG_I2C_AND(GEN2_I2C_GPIO_EXP0, GEN2_GPIO_EXP_CONFIG1, ~BIT4), + + /* Route DIGITAL 0 -> IO0 -> UART0_RXD + * Set LVL_C_OE0_N (EXP1.P0_0) high + * Configure LVL_C_OE0_N (EXP1.P0_0) as an output + */ + REG_I2C_OR(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_OUTPUT0, BIT0), + REG_I2C_AND(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_CONFIG0, ~BIT0), + + REG_SCRIPT_END +}; + static const struct reg_script gen2_i2c_init[] = { /* Route I2C to Arduino Shield connector: * Set AMUX1_IN (EXP2.P1_4) low |