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Introduce devm_cpm_muram_alloc() and devm_cpm_muram_alloc_fixed(), the
resource-managed version of cpm_muram_alloc and cpm_muram_alloc_fixed().
These resource-managed versions simplify the user avoiding the need to
call cpm_muram_free(). Indeed, the allocated area returned by these
functions will be automatically freed on driver detach.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-33-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles the CPM1 version of QMC.
In order to prepare the support for the QUICC Engine (QE) version of
QMC, introduce qmc_version to identify versions. This will enable the
code to make the distinction between several QMC implementations.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-32-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles CPM1 version of QMC. Even if GSMRL is specific to
the CPM1 version, the exact same purpose and format register (GUMRL) is
present in the QUICC Engine (QE) version of QMC. Compared to the QE
version, the values defined for the mode bitfield are different and the
0x0A value defined for the QMC mode is CPM1 specific.
In order to prepare the support for the QE version, rename this bitfield
value to clearly identify it as CPM1 specific.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-31-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles the CPM1 version of QMC, RPACK does not need to
be initialized. This is not the case in the QUICC Engine (QE) version.
In preparation of the support for QE, initialize the RPACK register
when the receiver is initialized and each time it is restarted.
This additional RPACK initialization has no impact in the CPM1 version
of QMC.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-30-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles CPM1 version of QMC and qmc_chan_command() is
clearly CPM1 specific.
In order to prepare the support for the QUICC Engine (QE) version,
rename qmc_chan_command() to reflect that point.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-29-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles the CPM1 version of QMC and initialize the QMC used
SCC. The QUICC Engine (QE) version uses an UCC (Unified Communication
Controllers) instead of the SCC (Serial Communication Controllers) used
in the CPM1 version. These controllers serve the same purpose and are
used in the same way but their inializations are slightly different.
In order to prepare the support for QE version of QMC, introduce
qmc_init_xcc() to initialize theses controllers (UCC in QE and SCC in
CPM1) and isolate the CPM1 specific SCC initialization in a specific
function.
Also introduce qmc_exit_xcc() for consistency to revert operations done
in qmc_init_xcc().
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-28-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles the CPM1 version of QMC. Resources initialisations
(i.e. retrieving base addresses and offsets of different parts) will
be slightly different in the QUICC Engine (QE) version. Indeed, in QE
version, some resources need to be allocated and are no more "staticaly"
defined.
In order to prepare the support for QE version, introduce
qmc_init_resource() to initialize those resources and isolate the CPM1
specific operations in a specific function.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-27-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles CPM1 version of QMC. In the QUICC Engine (QE)
version, some operations done at probe() need to be done in a different
order.
In order to prepare the support for the QE version, changed the sequence
of operation done at probe():
- Retrieve the tsa_serial earlier, before initializing resources.
- Group SCC initialisation and do this initialization when it is really
needed in the probe() sequence.
Having the QE compatible sequence in the CPM1 version does not lead to
any issue and works correctly without any regressions.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-26-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Current code handles CPM1 version of QMC. Some hardcoded values are used
several times to initialize the QMC state machine. In the QUICC Engine
(QE) version of QMC, these values are different.
In order to prepare the support for the QE version of QMC and avoid the
copy of the hardcoded values, introduce the qmc_data structure to define
these version specific values.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-25-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
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Herve Codina