erebion/coreboot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

drivers/wifi: Support Drive Strength BRI Rsp Table

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

9
src/include/sar.h
View file

@ -9,7 +9,7 @@
#define MAX_DENYLIST_ENTRY 16
#define MAX_DSAR_SET_COUNT 3
#define MAX_GEO_OFFSET_REVISION 3
#define MAX_PROFILE_COUNT 15
#define MAX_PROFILE_COUNT 16
#define MAX_SAR_REVISION 2
#define MAX_BSAR_REVISION 2
#define WBEM_REVISION 0
@ -21,6 +21,7 @@
#define BDMM_REVISION 1
#define EBRD_REVISION 1
#define WPFC_REVISION 0
#define DSBR_REVISION 0
#define REVISION_SIZE 1
#define SAR_REV0_CHAINS_COUNT 2
#define SAR_REV0_SUBBANDS_COUNT 5
@ -153,6 +154,11 @@ struct wpfc_profile {
uint8_t filter_cfg_chain_d;
} __packed;
struct dsbr_profile {
uint8_t revision;
uint32_t bri_resistor_value;
} __packed;
struct sar_header {
char marker[SAR_STR_PREFIX_SIZE];
uint8_t version;
@ -177,6 +183,7 @@ union wifi_sar_limits {
struct bdmm_profile *bdmm;
struct ebrd_profile *ebrd;
struct wpfc_profile *wpfc;
struct dsbr_profile *dsbr;
};
void *profile[MAX_PROFILE_COUNT];
};