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4.19.x+fslc
linux-brain/drivers/bcma
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Colin Ian King d5eda6cad0 bcma: fix incorrect update of BCMA_CORE_PCI_MDIO_DATA 
[ Upstream commit 420c20be08 ]

An earlier commit re-worked the setting of the bitmask and is now
assigning v with some bit flags rather than bitwise or-ing them
into v, consequently the earlier bit-settings of v are being lost.
Fix this by replacing an assignment with the bitwise or instead.

Addresses-Coverity: ("Unused value")
Fixes: 2be25cac84 ("bcma: add constants for PCI and use them")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:51:09 +01:00
..
bcma_private.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
core.c bcma: update core (en|dis)abling functions 2013-06-17 14:38:53 -04:00
driver_chipcommon_b.c bcma: define ChipCommon B MII registers 2016-07-19 21:13:10 +03:00
driver_chipcommon_nflash.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
driver_chipcommon_pflash.c bcma: move parallel flash support to separated file 2016-03-07 14:41:08 +02:00
driver_chipcommon_pmu.c bcma: Replace mdelay with usleep_range in bcma_pmu_resources_init 2018-02-27 15:52:13 +02:00
driver_chipcommon_sflash.c mtd: bcm47xxsflash: use ioremap_cache() instead of KSEG0ADDR() 2016-04-04 00:07:57 -07:00
driver_chipcommon.c Revert "bcma: init serial console directly from ChipCommon code" 2017-01-17 14:23:44 +02:00
driver_gmac_cmn.c Drivers: bcma: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
driver_gpio.c gpio: Move irqdomain into struct gpio_irq_chip 2017-11-08 14:06:21 +01:00
driver_mips.c bcma: fix buffer size caused crash in bcma_core_mips_print_irq() 2018-05-12 11:36:59 +03:00
driver_pci_host.c bcma: add missing includes 2015-03-03 15:26:38 +02:00
driver_pci.c bcma: fix incorrect update of BCMA_CORE_PCI_MDIO_DATA 2020-01-27 14:51:09 +01:00
driver_pcie2.c bcma: Adjust block comment 2017-12-07 15:33:02 +02:00
host_pci.c bcma: add HP Stream Notebook 2018-02-28 16:37:22 +02:00
host_soc.c bcma: use standard bus scanning during early register 2015-01-23 21:47:55 +02:00
Kconfig bcma: Allow selection of this driver when COMPILE_TEST=y 2018-07-18 09:34:19 +02:00
main.c drivers: remove force dma flag from buses 2018-05-03 16:25:08 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
README
scan.c bcma: support chipsets with PMU and GCI cores (devices) 2016-02-06 13:34:51 +02:00
scan.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sprom.c bcma: detect SPROM revision 11 2015-01-29 10:49:28 +02:00
TODO

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.