From e0b7a88f586d746c72da1fedfbeda3156faf4d73 Mon Sep 17 00:00:00 2001 From: Karthikeyan Ramasubramanian Date: Mon, 20 Apr 2020 13:43:29 -0600 Subject: soc/intel/jasperlake: Add support to generate ACPI GPIO operations Add support to generate ACPI operations to get/set/clear RX/TX GPIOs. BUG=b:152936541 TEST=Build and boot the mainboard. Ensure that there are no errors in the coreboot logs regarding unsupported ACPI GPIO operations. Change-Id: Ibc4846fbd9baf4f22c48c82acefed960669ed7d4 Signed-off-by: Karthikeyan Ramasubramanian Reviewed-on: https://review.coreboot.org/c/coreboot/+/40536 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- src/soc/intel/jasperlake/acpi.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'src/soc') diff --git a/src/soc/intel/jasperlake/acpi.c b/src/soc/intel/jasperlake/acpi.c index 4acd8a6131..b390968708 100644 --- a/src/soc/intel/jasperlake/acpi.c +++ b/src/soc/intel/jasperlake/acpi.c @@ -330,3 +330,40 @@ int soc_madt_sci_irq_polarity(int sci) { return MP_IRQ_POLARITY_HIGH; } + +static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num) +{ + /* op (gpio_num) */ + acpigen_emit_namestring(op); + acpigen_write_integer(gpio_num); + return 0; +} + +static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num) +{ + /* Store (op (gpio_num), Local0) */ + acpigen_write_store(); + acpigen_soc_gpio_op(op, gpio_num); + acpigen_emit_byte(LOCAL0_OP); + return 0; +} + +int acpigen_soc_read_rx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_get_gpio_state("\\_SB.PCI0.GRXS", gpio_num); +} + +int acpigen_soc_get_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_get_gpio_state("\\_SB.PCI0.GTXS", gpio_num); +} + +int acpigen_soc_set_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_gpio_op("\\_SB.PCI0.STXS", gpio_num); +} + +int acpigen_soc_clear_tx_gpio(unsigned int gpio_num) +{ + return acpigen_soc_gpio_op("\\_SB.PCI0.CTXS", gpio_num); +} -- cgit v1.2.3