Broadcom Bcm94312hmg Driver Link Link

#define BCM94312_SHM_BASE 0x04000000 // Shared memory #define BCM94312_MAILBOX_TX 0x04001000 // TX doorbell #define BCM94312_MAILBOX_RX 0x04001004 // RX doorbell #define BCM94312_FW_STATUS 0x04001008 // Firmware ready flag #define BCM94312_DESC_RING_TX 0x04002000 // TX descriptor ring #define BCM94312_DESC_RING_RX 0x04002080 // RX descriptor ring

Broadcom cards are notorious for requiring proprietary firmware on Linux. broadcom bcm94312hmg driver