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drivers/wifi: Support Drive Strength BRI Rsp Table

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Drive Strength BRI Rsp Object provides information from the OEM
platforms if they have replaced the Bluetooth Radio Interface resistor
to overcome the potential STEP errors on their designs. Based on
configuration, CNV firmware shall adjust the BRI Rsp line drive
strength.

The bri_resistor_value is encoded as follow:

|  Bit | Val | Description                                 | Default |
|------+-----+---------------------------------------------+---------|
|    0 |   0 | Device FW default values                    |       1 |
|      |   1 | Override device FW default values           |         |
|  3:1 |   0 | Reserved (shall be set to 0)                |       0 |
|  7:4 |   0 | DSBR override values (only if bit 0 is set) |     0xf |
| 31:7 |   0 | Reserved (shall be set to 0)                |       0 |

Possible values:
- 0xf1 (default): indicates that the resistor on board is 33 Ohm
- 0x0 or 0xb1: indicates that the resistor on board is 10 Ohm

The implementation follows document 559910 Intel Connectivity
Platforms BIOS Guideline revision 9.2 specification.

BUG=b:346600091
TEST=DSBR methods are added to the wifi device and bluetooth companion
     device and they return the data supplied by the SAR binary blob

Change-Id: Iebe95815c944d045f4cf686abcd1874a8a45e300
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85017
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jeremy Compostella 2024-11-01 14:15:42 -07:00 • committed by Jérémy Compostella
commit 83fb3b70f0
3 changed files with 57 additions and 3 deletions
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9
src/vendorcode/google/chromeos/sar.c
View file

@ -178,6 +178,14 @@ static size_t wpfc_table_size(const struct wpfc_profile *wpfc)
return sizeof(struct wpfc_profile);
}
static size_t dsbr_table_size(const struct dsbr_profile *dsbr)
{
if (dsbr == NULL)
return 0;
return sizeof(struct dsbr_profile);
}
static bool valid_legacy_length(size_t bin_len)
{
if (bin_len == LEGACY_SAR_WGDS_BIN_SIZE)
@ -239,6 +247,7 @@ static int fill_wifi_sar_limits(union wifi_sar_limits *sar_limits, const uint8_t
expected_sar_bin_size += bdmm_table_size(sar_limits->bdmm);
expected_sar_bin_size += ebrd_table_size(sar_limits->ebrd);
expected_sar_bin_size += wpfc_table_size(sar_limits->wpfc);
expected_sar_bin_size += dsbr_table_size(sar_limits->dsbr);
if (sar_bin_size != expected_sar_bin_size) {
printk(BIOS_ERR, "Invalid SAR size, expected: %zu, obtained: %zu\n",