From d1fc832c527699265c7d04517010cc4b0ea6aabd Mon Sep 17 00:00:00 2001 From: Sugnan Prabhu S Date: Tue, 31 Aug 2021 07:11:35 +0530 Subject: wifi: Add support for per-platform antenna gain Add support for the PPAG ACPI BIOS configuration table as per the connectivity document: 559910_Intel_Connectivity_Platforms_BIOS_Guidelines_Rev6_4.pdf BUG=b:193665559 TEST=Generated SAR file with the PPAG related configuration values and verified that the SSDT has the PPAG ACPI table. Change-Id: Ie8d25113feeeb4a4242cfd7d72a5091d2d5fb389 Signed-off-by: Sugnan Prabhu S Reviewed-on: https://review.coreboot.org/c/coreboot/+/57060 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- src/drivers/wifi/generic/acpi.c | 52 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'src/drivers/wifi') diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c index aa49be35e2..ed5b632216 100644 --- a/src/drivers/wifi/generic/acpi.c +++ b/src/drivers/wifi/generic/acpi.c @@ -42,6 +42,13 @@ static const uint8_t *wgds_fetch_set(struct geo_profile *wgds, size_t set_num) return wgds_table + (wgds->bands_count * set_num); } +static const uint8_t *ppag_fetch_set(struct gain_profile *ppag, size_t set_num) +{ + const uint8_t *ppag_table = &ppag->ppag_table[0]; + + return ppag_table + (ppag->bands_count * set_num); +} + static void sar_emit_wrds(const struct sar_profile *sar) { int i; @@ -216,6 +223,50 @@ static void sar_emit_wgds(struct geo_profile *wgds) acpigen_write_package_end(); } +static void sar_emit_ppag(struct gain_profile *ppag) +{ + int i; + size_t package_size, set_num; + const uint8_t *set; + + if (ppag == NULL) + return; + + /* + * Name ("PPAG", Package () { + * Revision, + * Package () { + * Domain Type, // 0x7:WiFi + * PPAG Mode, // Defines the mode of ANT_gain control to be used + * ANT_gain Table Chain A // Defines the ANT_gain in dBi for chain A + * ANT_gain Table Chain B // Defines the ANT_gain in dBi for chain B + * } + * }) + */ + if (ppag->revision > MAX_ANT_GAINS_REVISION) { + printk(BIOS_ERR, "Invalid PPAG revision: %d\n", ppag->revision); + return; + } + + package_size = 1 + 1 + ppag->chains_count * ppag->bands_count; + + acpigen_write_name("PPAG"); + acpigen_write_package(2); + acpigen_write_dword(ppag->revision); + acpigen_write_package(package_size); + acpigen_write_dword(DOMAIN_TYPE_WIFI); + acpigen_write_dword(ppag->mode); + + for (set_num = 0; set_num < ppag->chains_count; set_num++) { + set = ppag_fetch_set(ppag, set_num); + for (i = 0; i < ppag->bands_count; i++) + acpigen_write_byte(set[i]); + } + + acpigen_write_package_end(); + acpigen_write_package_end(); +} + static void emit_sar_acpi_structures(const struct device *dev) { union wifi_sar_limits sar_limits; @@ -236,6 +287,7 @@ static void emit_sar_acpi_structures(const struct device *dev) sar_emit_wrds(sar_limits.sar); sar_emit_ewrd(sar_limits.sar); sar_emit_wgds(sar_limits.wgds); + sar_emit_ppag(sar_limits.ppag); free(sar_limits.sar); } -- cgit v1.2.3