ARM: brcmstb: Add debug UART entry for 74165

BCM74165 uses the same address map as the 7278 family (v7 memory map)
therefore re-use that constant and shift down the other labels to keep
numerical or

ARM: brcmstb: Add debug UART entry for 74165

BCM74165 uses the same address map as the 7278 family (v7 memory map)
therefore re-use that constant and shift down the other labels to keep
numerical ordering.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Florian Fainelli <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 1)

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
un

treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 1)

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
under the terms of the gnu general public license as published by the
free software foundation version 2 this program is distributed as is
without any warranty of any kind whether express or implied without
even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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ARM: brcmstb: Add debug UART entry for 72116

72116 has the same memory map as 7255 and the same physical address for
the UART, alias the definition accordingly.

Reviewed-by: Linus Walleij <linus.wa

ARM: brcmstb: Add debug UART entry for 72116

72116 has the same memory map as 7255 and the same physical address for
the UART, alias the definition accordingly.

Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: 9004/1: debug: Split waituart to CTS and TXRDY

This patch was triggered by a remark from Russell that
introducing a call to the waituart (needed to fix debug prints
on the Qualcomm platforms) w

ARM: 9004/1: debug: Split waituart to CTS and TXRDY

This patch was triggered by a remark from Russell that
introducing a call to the waituart (needed to fix debug prints
on the Qualcomm platforms) was dangerous because in some cases
this will involve waiting for a modem CTS (clear to send)
signal, and debug messages would maybe not work on platforms
with no modem connected to the UART port: they will just
hang waiting for the modem to assert CTS and this might never
happen.

Looking through all UART debug drivers implementing the waituart
macro I discovered that all users except two actually use this
macro to check if the UART is ready for TX, let's call this
TXRDY.

Only two debug UART drivers actually check for CTS:
- arch/arm/include/debug/8250.S
- arch/arm/include/debug/tegra.S

The former is very significant since the 8250 is possibly
the most common UART on the planet.

We have the following problem: the semantics of waituart are
ambiguous making it dangerous to introduce the macro to debug
code fixing debug prints for Qualcomm. To start to pry this
problem apart, this patch does the following:

- Convert all debug UART drivers to define two macros:

- waituartcts with the clear semantic to wait for CTS
to be asserted

- waituarttxrdy with the clear semantic to wait for the TX
capability of the UART to be ready

- When doing this take care to assign the right function to
each drivers macro, so they now do exactly the above.

- Update the three sites in the kernel invoking the waituart
macro to call waituartcts/waituarttxrdy in sequence, so that
the functional impact on the kernel should be zero.

After this we can start to change the code sites using this
code to do the right thing.

Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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ARM: brcmstb: Add debug UART entry for 72615

72165 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Florian Fainelli <f.f

ARM: brcmstb: Add debug UART entry for 72615

72165 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add debug UART entry for 72614

72164 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Florian Fainelli <f.f

ARM: brcmstb: Add debug UART entry for 72614

72164 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add debug UART entry for 7216

7216 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Justin Chen <justinpopo

ARM: brcmstb: Add debug UART entry for 7216

7216 has the same memory map as 7278 and the same physical address for
the UART, alias the definition accordingly.

Signed-off-by: Justin Chen <[email protected]>
[florian: expand commit message]
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add entry for 7255

Add in BCM7255 entry and reorder entries to keep ascending order. Also
moved 7278 cause it was out of order.

Signed-off-by: Justin Chen <[email protected]>
Sign

ARM: brcmstb: Add entry for 7255

Add in BCM7255 entry and reorder entries to keep ascending order. Also
moved 7278 cause it was out of order.

Signed-off-by: Justin Chen <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add support for the V7 memory map

The 7278 device is the first device that includes support for the V7
memory map developed for use in 64-bit architecture brcmstb devices.
This map rel

ARM: brcmstb: Add support for the V7 memory map

The 7278 device is the first device that includes support for the V7
memory map developed for use in 64-bit architecture brcmstb devices.
This map relocates the register physical offset from 0xF0000000 to
0x0000000008000000.

Since the ARM PERIPHBASE value is also relocated in the V7 memory map
we can use its value to determine whether this device uses the new
V7 memory map and therefore where to look for the SUN_TOP_CTRL
register used to identify the chip family.

Signed-off-by: Doug Berger <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping

Building a big-endian kernel for ARCH_BRCMSTB revealed that we would not
be correctly polling for the right bit in the busyuart macro, tur

ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping

Building a big-endian kernel for ARCH_BRCMSTB revealed that we would not
be correctly polling for the right bit in the busyuart macro, turns out
there are a few transformations needed to work with big-endian kernels.
First we need to swap the value we read from SUN_TOP_CTRL to properly
compare it against our local tables. Then, just like 8250.S we need to
swap the value before storing it, and conversely swap it after a load.

Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add entry for 7260

BCM7260 has the same UART base address as 7268, order the entries by
ascending chip number and alias the 7268 definition to the 7260
definition.

Signed-off-by: Flor

ARM: brcmstb: Add entry for 7260

BCM7260 has the same UART base address as 7268, order the entries by
ascending chip number and alias the 7268 definition to the 7260
definition.

Signed-off-by: Florian Fainelli <[email protected]>

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ARM: brcmstb: Add earlyprintk support using run-time checks

The SUN_TOP_CTRL_FAMILY_ID register is at a fixed absolute address for
all of our supported chips, so utilize its value to determine what

ARM: brcmstb: Add earlyprintk support using run-time checks

The SUN_TOP_CTRL_FAMILY_ID register is at a fixed absolute address for
all of our supported chips, so utilize its value to determine what the
UARTA base address should be based on the value we read.

Since the code is called both during decompressor when the MMU is off,
and after the MMU has been turned on in the kernel, and we want to do
the lookup only once, we use the same technique as tegra.S and have a
shared storage location between the decompressor and the kernel.

Signed-off-by: Florian Fainelli <[email protected]>

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