Centos-kernel-stream-9/drivers/bcma
Jose Ignacio Tornos Martinez a4ba6e9bd3 bcma: Use PCI_HEADER_TYPE_MASK instead of literal
JIRA: https://issues.redhat.com/browse/RHEL-34696

commit ac586b8401c911df24019532a28b69a4257e53d5
Author: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date:   Fri Nov 24 11:09:18 2023 +0200

    bcma: Use PCI_HEADER_TYPE_MASK instead of literal
    
    Replace literal 0x7f with PCI_HEADER_TYPE_MASK.
    
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Signed-off-by: Kalle Valo <kvalo@kernel.org>
    Link: https://lore.kernel.org/r/20231124090919.23687-6-ilpo.jarvinen@linux.intel.com

Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
2024-06-17 09:18:22 +02:00
..
Kconfig
Makefile
README
TODO
bcma_private.h
core.c
driver_chipcommon.c bcma: cleanup comments 2023-05-09 08:15:47 +02:00
driver_chipcommon_b.c
driver_chipcommon_nflash.c mtd: rawnand: brcmnand: Add platform data structure for BCMA 2023-05-09 08:15:47 +02:00
driver_chipcommon_pflash.c
driver_chipcommon_pmu.c bcma: cleanup comments 2023-05-09 08:15:47 +02:00
driver_chipcommon_sflash.c
driver_gmac_cmn.c
driver_gpio.c bcma: gpio: Convert to immutable gpio irqchip 2023-05-09 08:15:49 +02:00
driver_mips.c bcma: remove unused mips_read32 function 2023-11-27 15:00:53 +01:00
driver_pci.c
driver_pci_host.c bcma: Use PCI_HEADER_TYPE_MASK instead of literal 2024-06-17 09:18:22 +02:00
driver_pcie2.c
host_pci.c
host_soc.c bcma: convert to platform remove callback returning void 2024-06-17 09:18:22 +02:00
main.c bcma: make bcma_bus_type const 2024-06-17 09:18:22 +02:00
scan.c bcma: Drop the unused parameter of bcma_scan_read32() 2023-05-09 08:15:46 +02:00
scan.h
sprom.c bcma: support SPROM rev 11 2023-05-09 08:15:48 +02:00

README

Broadcom introduced new bus as replacement for older SSB. It is based on AMBA,
however from programming point of view there is nothing AMBA specific we use.

Standard AMBA drivers are platform specific, have hardcoded addresses and use
AMBA standard fields like CID and PID.

In case of Broadcom's cards every device consists of:
1) Broadcom specific AMBA device. It is put on AMBA bus, but can not be treated
   as standard AMBA device. Reading it's CID or PID can cause machine lockup.
2) AMBA standard devices called ports or wrappers. They have CIDs (AMBA_CID)
   and PIDs (0x103BB369), but we do not use that info for anything. One of that
   devices is used for managing Broadcom specific core.

Addresses of AMBA devices are not hardcoded in driver and have to be read from
EPROM.

In this situation we decided to introduce separated bus. It can contain up to
16 devices identified by Broadcom specific fields: manufacturer, id, revision
and class.